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openwrtv4/target/linux/avr32/patches/100-git_sync.patch
Matteo Croce b0fa59bef2 avr32: upgrade to 2.6.25.6 
SVN-Revision: 11450
2008-06-12 21:13:40 +00:00

50639 lines
1.4 MiB
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diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/at91cap9_devices.c avr32-2.6/arch/arm/mach-at91/at91cap9_devices.c
--- linux-2.6.25.6/arch/arm/mach-at91/at91cap9_devices.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/at91cap9_devices.c 2008-06-12 15:09:38.603815938 +0200
@@ -278,20 +278,25 @@
* -------------------------------------------------------------------- */
#if defined(CONFIG_MTD_NAND_AT91) || defined(CONFIG_MTD_NAND_AT91_MODULE)
-static struct at91_nand_data nand_data;
+static struct atmel_nand_data nand_data;
#define NAND_BASE AT91_CHIPSELECT_3
static struct resource nand_resources[] = {
- {
+ [0] = {
.start = NAND_BASE,
.end = NAND_BASE + SZ_256M - 1,
.flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = AT91_BASE_SYS + AT91_ECC,
+ .end = AT91_BASE_SYS + AT91_ECC + SZ_512 - 1,
+ .flags = IORESOURCE_MEM,
}
};
static struct platform_device at91cap9_nand_device = {
- .name = "at91_nand",
+ .name = "atmel_nand",
.id = -1,
.dev = {
.platform_data = &nand_data,
@@ -300,7 +305,7 @@
.num_resources = ARRAY_SIZE(nand_resources),
};
-void __init at91_add_device_nand(struct at91_nand_data *data)
+void __init at91_add_device_nand(struct atmel_nand_data *data)
{
unsigned long csa, mode;
@@ -341,7 +346,7 @@
platform_device_register(&at91cap9_nand_device);
}
#else
-void __init at91_add_device_nand(struct at91_nand_data *data) {}
+void __init at91_add_device_nand(struct atmel_nand_data *data) {}
#endif
/* --------------------------------------------------------------------
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/at91rm9200_devices.c avr32-2.6/arch/arm/mach-at91/at91rm9200_devices.c
--- linux-2.6.25.6/arch/arm/mach-at91/at91rm9200_devices.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/at91rm9200_devices.c 2008-06-12 15:09:38.603815938 +0200
@@ -369,7 +369,7 @@
* -------------------------------------------------------------------- */
#if defined(CONFIG_MTD_NAND_AT91) || defined(CONFIG_MTD_NAND_AT91_MODULE)
-static struct at91_nand_data nand_data;
+static struct atmel_nand_data nand_data;
#define NAND_BASE AT91_CHIPSELECT_3
@@ -382,7 +382,7 @@
};
static struct platform_device at91rm9200_nand_device = {
- .name = "at91_nand",
+ .name = "atmel_nand",
.id = -1,
.dev = {
.platform_data = &nand_data,
@@ -391,7 +391,7 @@
.num_resources = ARRAY_SIZE(nand_resources),
};
-void __init at91_add_device_nand(struct at91_nand_data *data)
+void __init at91_add_device_nand(struct atmel_nand_data *data)
{
unsigned int csa;
@@ -429,7 +429,7 @@
platform_device_register(&at91rm9200_nand_device);
}
#else
-void __init at91_add_device_nand(struct at91_nand_data *data) {}
+void __init at91_add_device_nand(struct atmel_nand_data *data) {}
#endif
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/at91sam9260_devices.c avr32-2.6/arch/arm/mach-at91/at91sam9260_devices.c
--- linux-2.6.25.6/arch/arm/mach-at91/at91sam9260_devices.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/at91sam9260_devices.c 2008-06-12 15:09:38.603815938 +0200
@@ -283,20 +283,25 @@
* -------------------------------------------------------------------- */
#if defined(CONFIG_MTD_NAND_AT91) || defined(CONFIG_MTD_NAND_AT91_MODULE)
-static struct at91_nand_data nand_data;
+static struct atmel_nand_data nand_data;
#define NAND_BASE AT91_CHIPSELECT_3
static struct resource nand_resources[] = {
- {
+ [0] = {
.start = NAND_BASE,
.end = NAND_BASE + SZ_256M - 1,
.flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = AT91_BASE_SYS + AT91_ECC,
+ .end = AT91_BASE_SYS + AT91_ECC + SZ_512 - 1,
+ .flags = IORESOURCE_MEM,
}
};
static struct platform_device at91sam9260_nand_device = {
- .name = "at91_nand",
+ .name = "atmel_nand",
.id = -1,
.dev = {
.platform_data = &nand_data,
@@ -305,7 +310,7 @@
.num_resources = ARRAY_SIZE(nand_resources),
};
-void __init at91_add_device_nand(struct at91_nand_data *data)
+void __init at91_add_device_nand(struct atmel_nand_data *data)
{
unsigned long csa, mode;
@@ -346,7 +351,7 @@
platform_device_register(&at91sam9260_nand_device);
}
#else
-void __init at91_add_device_nand(struct at91_nand_data *data) {}
+void __init at91_add_device_nand(struct atmel_nand_data *data) {}
#endif
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/at91sam9261_devices.c avr32-2.6/arch/arm/mach-at91/at91sam9261_devices.c
--- linux-2.6.25.6/arch/arm/mach-at91/at91sam9261_devices.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/at91sam9261_devices.c 2008-06-12 15:09:38.607815889 +0200
@@ -199,7 +199,7 @@
* -------------------------------------------------------------------- */
#if defined(CONFIG_MTD_NAND_AT91) || defined(CONFIG_MTD_NAND_AT91_MODULE)
-static struct at91_nand_data nand_data;
+static struct atmel_nand_data nand_data;
#define NAND_BASE AT91_CHIPSELECT_3
@@ -211,8 +211,8 @@
}
};
-static struct platform_device at91_nand_device = {
- .name = "at91_nand",
+static struct platform_device atmel_nand_device = {
+ .name = "atmel_nand",
.id = -1,
.dev = {
.platform_data = &nand_data,
@@ -221,7 +221,7 @@
.num_resources = ARRAY_SIZE(nand_resources),
};
-void __init at91_add_device_nand(struct at91_nand_data *data)
+void __init at91_add_device_nand(struct atmel_nand_data *data)
{
unsigned long csa, mode;
@@ -262,11 +262,11 @@
at91_set_A_periph(AT91_PIN_PC1, 0); /* NANDWE */
nand_data = *data;
- platform_device_register(&at91_nand_device);
+ platform_device_register(&atmel_nand_device);
}
#else
-void __init at91_add_device_nand(struct at91_nand_data *data) {}
+void __init at91_add_device_nand(struct atmel_nand_data *data) {}
#endif
@@ -539,6 +539,20 @@
at91_set_B_periph(AT91_PIN_PB28, 0); /* LCDD23 */
#endif
+#ifdef CONFIG_FB_INTSRAM
+ {
+ void __iomem *fb;
+ struct resource *fb_res = &lcdc_resources[2];
+ size_t fb_len = fb_res->end - fb_res->start + 1;
+
+ fb = ioremap_writecombine(fb_res->start, fb_len);
+ if (fb) {
+ memset(fb, 0, fb_len);
+ iounmap(fb, fb_len);
+ }
+ }
+#endif
+
lcdc_data = *data;
platform_device_register(&at91_lcdc_device);
}
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/at91sam9263_devices.c avr32-2.6/arch/arm/mach-at91/at91sam9263_devices.c
--- linux-2.6.25.6/arch/arm/mach-at91/at91sam9263_devices.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/at91sam9263_devices.c 2008-06-12 15:09:38.607815889 +0200
@@ -353,20 +353,25 @@
* -------------------------------------------------------------------- */
#if defined(CONFIG_MTD_NAND_AT91) || defined(CONFIG_MTD_NAND_AT91_MODULE)
-static struct at91_nand_data nand_data;
+static struct atmel_nand_data nand_data;
#define NAND_BASE AT91_CHIPSELECT_3
static struct resource nand_resources[] = {
- {
+ [0] = {
.start = NAND_BASE,
.end = NAND_BASE + SZ_256M - 1,
.flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = AT91_BASE_SYS + AT91_ECC0,
+ .end = AT91_BASE_SYS + AT91_ECC0 + SZ_512 - 1,
+ .flags = IORESOURCE_MEM,
}
};
static struct platform_device at91sam9263_nand_device = {
- .name = "at91_nand",
+ .name = "atmel_nand",
.id = -1,
.dev = {
.platform_data = &nand_data,
@@ -375,7 +380,7 @@
.num_resources = ARRAY_SIZE(nand_resources),
};
-void __init at91_add_device_nand(struct at91_nand_data *data)
+void __init at91_add_device_nand(struct atmel_nand_data *data)
{
unsigned long csa, mode;
@@ -416,7 +421,7 @@
platform_device_register(&at91sam9263_nand_device);
}
#else
-void __init at91_add_device_nand(struct at91_nand_data *data) {}
+void __init at91_add_device_nand(struct atmel_nand_data *data) {}
#endif
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/at91sam9rl_devices.c avr32-2.6/arch/arm/mach-at91/at91sam9rl_devices.c
--- linux-2.6.25.6/arch/arm/mach-at91/at91sam9rl_devices.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/at91sam9rl_devices.c 2008-06-12 15:09:38.607815889 +0200
@@ -100,20 +100,25 @@
* -------------------------------------------------------------------- */
#if defined(CONFIG_MTD_NAND_AT91) || defined(CONFIG_MTD_NAND_AT91_MODULE)
-static struct at91_nand_data nand_data;
+static struct atmel_nand_data nand_data;
#define NAND_BASE AT91_CHIPSELECT_3
static struct resource nand_resources[] = {
- {
+ [0] = {
.start = NAND_BASE,
.end = NAND_BASE + SZ_256M - 1,
.flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = AT91_BASE_SYS + AT91_ECC,
+ .end = AT91_BASE_SYS + AT91_ECC + SZ_512 - 1,
+ .flags = IORESOURCE_MEM,
}
};
-static struct platform_device at91_nand_device = {
- .name = "at91_nand",
+static struct platform_device atmel_nand_device = {
+ .name = "atmel_nand",
.id = -1,
.dev = {
.platform_data = &nand_data,
@@ -122,7 +127,7 @@
.num_resources = ARRAY_SIZE(nand_resources),
};
-void __init at91_add_device_nand(struct at91_nand_data *data)
+void __init at91_add_device_nand(struct atmel_nand_data *data)
{
unsigned long csa;
@@ -159,11 +164,11 @@
at91_set_A_periph(AT91_PIN_PB5, 0); /* NANDWE */
nand_data = *data;
- platform_device_register(&at91_nand_device);
+ platform_device_register(&atmel_nand_device);
}
#else
-void __init at91_add_device_nand(struct at91_nand_data *data) {}
+void __init at91_add_device_nand(struct atmel_nand_data *data) {}
#endif
@@ -376,6 +381,20 @@
at91_set_B_periph(AT91_PIN_PC24, 0); /* LCDD22 */
at91_set_B_periph(AT91_PIN_PC25, 0); /* LCDD23 */
+#ifdef CONFIG_FB_INTSRAM
+ {
+ void __iomem *fb;
+ struct resource *fb_res = &lcdc_resources[2];
+ size_t fb_len = fb_res->end - fb_res->start + 1;
+
+ fb = ioremap_writecombine(fb_res->start, fb_len);
+ if (fb) {
+ memset(fb, 0, fb_len);
+ iounmap(fb, fb_len);
+ }
+ }
+#endif
+
lcdc_data = *data;
platform_device_register(&at91_lcdc_device);
}
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/board-cap9adk.c avr32-2.6/arch/arm/mach-at91/board-cap9adk.c
--- linux-2.6.25.6/arch/arm/mach-at91/board-cap9adk.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/board-cap9adk.c 2008-06-12 15:09:38.607815889 +0200
@@ -175,7 +175,7 @@
return cap9adk_nand_partitions;
}
-static struct at91_nand_data __initdata cap9adk_nand_data = {
+static struct atmel_nand_data __initdata cap9adk_nand_data = {
.ale = 21,
.cle = 22,
// .det_pin = ... not connected
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/board-dk.c avr32-2.6/arch/arm/mach-at91/board-dk.c
--- linux-2.6.25.6/arch/arm/mach-at91/board-dk.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/board-dk.c 2008-06-12 15:09:38.611815840 +0200
@@ -151,7 +151,7 @@
return dk_nand_partition;
}
-static struct at91_nand_data __initdata dk_nand_data = {
+static struct atmel_nand_data __initdata dk_nand_data = {
.ale = 22,
.cle = 21,
.det_pin = AT91_PIN_PB1,
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/board-kb9202.c avr32-2.6/arch/arm/mach-at91/board-kb9202.c
--- linux-2.6.25.6/arch/arm/mach-at91/board-kb9202.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/board-kb9202.c 2008-06-12 15:09:38.611815840 +0200
@@ -102,7 +102,7 @@
return kb9202_nand_partition;
}
-static struct at91_nand_data __initdata kb9202_nand_data = {
+static struct atmel_nand_data __initdata kb9202_nand_data = {
.ale = 22,
.cle = 21,
// .det_pin = ... not there
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/board-sam9260ek.c avr32-2.6/arch/arm/mach-at91/board-sam9260ek.c
--- linux-2.6.25.6/arch/arm/mach-at91/board-sam9260ek.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/board-sam9260ek.c 2008-06-12 15:09:38.611815840 +0200
@@ -146,7 +146,7 @@
return ek_nand_partition;
}
-static struct at91_nand_data __initdata ek_nand_data = {
+static struct atmel_nand_data __initdata ek_nand_data = {
.ale = 21,
.cle = 22,
// .det_pin = ... not connected
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/board-sam9261ek.c avr32-2.6/arch/arm/mach-at91/board-sam9261ek.c
--- linux-2.6.25.6/arch/arm/mach-at91/board-sam9261ek.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/board-sam9261ek.c 2008-06-12 15:09:38.611815840 +0200
@@ -189,7 +189,7 @@
return ek_nand_partition;
}
-static struct at91_nand_data __initdata ek_nand_data = {
+static struct atmel_nand_data __initdata ek_nand_data = {
.ale = 22,
.cle = 21,
// .det_pin = ... not connected
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/board-sam9263ek.c avr32-2.6/arch/arm/mach-at91/board-sam9263ek.c
--- linux-2.6.25.6/arch/arm/mach-at91/board-sam9263ek.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/board-sam9263ek.c 2008-06-12 15:09:38.611815840 +0200
@@ -192,7 +192,7 @@
return ek_nand_partition;
}
-static struct at91_nand_data __initdata ek_nand_data = {
+static struct atmel_nand_data __initdata ek_nand_data = {
.ale = 21,
.cle = 22,
// .det_pin = ... not connected
diff --exclude=.git -urN linux-2.6.25.6/arch/arm/mach-at91/board-sam9rlek.c avr32-2.6/arch/arm/mach-at91/board-sam9rlek.c
--- linux-2.6.25.6/arch/arm/mach-at91/board-sam9rlek.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/arm/mach-at91/board-sam9rlek.c 2008-06-12 15:09:38.611815840 +0200
@@ -93,7 +93,7 @@
return ek_nand_partition;
}
-static struct at91_nand_data __initdata ek_nand_data = {
+static struct atmel_nand_data __initdata ek_nand_data = {
.ale = 21,
.cle = 22,
// .det_pin = ... not connected
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/boards/atngw100/Kconfig avr32-2.6/arch/avr32/boards/atngw100/Kconfig
--- linux-2.6.25.6/arch/avr32/boards/atngw100/Kconfig 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/boards/atngw100/Kconfig 2008-06-12 15:09:38.711815728 +0200
@@ -0,0 +1,12 @@
+# NGW100 customization
+
+config BOARD_ATNGW100_I2C_GPIO
+ bool "Use GPIO for i2c instead of built-in TWI module"
+ help
+ The driver for the built-in TWI module has been plagued by
+ various problems, while the i2c-gpio driver is based on the
+ trusty old i2c-algo-bit bitbanging engine, making it work
+ on pretty much any setup.
+
+ Choose 'Y' here if you're having i2c-related problems and
+ want to rule out the i2c bus driver.
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/boards/atngw100/setup.c avr32-2.6/arch/avr32/boards/atngw100/setup.c
--- linux-2.6.25.6/arch/avr32/boards/atngw100/setup.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/boards/atngw100/setup.c 2008-06-12 15:09:38.711815728 +0200
@@ -25,6 +25,13 @@
#include <asm/arch/init.h>
#include <asm/arch/portmux.h>
+/* Oscillator frequencies. These are board-specific */
+unsigned long at32_board_osc_rates[3] = {
+ [0] = 32768, /* 32.768 kHz on RTC osc */
+ [1] = 20000000, /* 20 MHz on osc0 */
+ [2] = 12000000, /* 12 MHz on osc1 */
+};
+
/* Initialized by bootloader-specific startup code. */
struct tag *bootloader_tags __initdata;
@@ -37,11 +44,16 @@
static struct spi_board_info spi0_board_info[] __initdata = {
{
.modalias = "mtd_dataflash",
- .max_speed_hz = 10000000,
+ .max_speed_hz = 8000000,
.chip_select = 0,
},
};
+static struct mci_platform_data __initdata mci0_data = {
+ .detect_pin = GPIO_PIN_PC(25),
+ .wp_pin = GPIO_PIN_PE(0),
+};
+
/*
* The next two functions should go away as the boot loader is
* supposed to initialize the macb address registers with a valid
@@ -124,6 +136,7 @@
}
};
+#ifdef CONFIG_BOARD_ATNGW100_I2C_GPIO
static struct i2c_gpio_platform_data i2c_gpio_data = {
.sda_pin = GPIO_PIN_PA(6),
.scl_pin = GPIO_PIN_PA(7),
@@ -139,6 +152,7 @@
.platform_data = &i2c_gpio_data,
},
};
+#endif
static int __init atngw100_init(void)
{
@@ -157,6 +171,7 @@
set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
+ at32_add_device_mci(0, &mci0_data);
at32_add_device_usba(0, NULL);
for (i = 0; i < ARRAY_SIZE(ngw_leds); i++) {
@@ -165,11 +180,15 @@
}
platform_device_register(&ngw_gpio_leds);
+#ifdef CONFIG_BOARD_ATNGW100_I2C_GPIO
at32_select_gpio(i2c_gpio_data.sda_pin,
AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
at32_select_gpio(i2c_gpio_data.scl_pin,
AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
platform_device_register(&i2c_gpio_device);
+#else
+ at32_add_device_twi(0, NULL, 0);
+#endif
return 0;
}
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/boards/atstk1000/atstk1002.c avr32-2.6/arch/avr32/boards/atstk1000/atstk1002.c
--- linux-2.6.25.6/arch/avr32/boards/atstk1000/atstk1002.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/boards/atstk1000/atstk1002.c 2008-06-12 15:09:38.711815728 +0200
@@ -1,7 +1,7 @@
/*
- * ATSTK1002 daughterboard-specific init code
+ * ATSTK1002/ATSTK1006 daughterboard-specific init code
*
- * Copyright (C) 2005-2006 Atmel Corporation
+ * Copyright (C) 2005-2007 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -28,6 +28,80 @@
#include "atstk1000.h"
+/* Oscillator frequencies. These are board specific */
+unsigned long at32_board_osc_rates[3] = {
+ [0] = 32768, /* 32.768 kHz on RTC osc */
+ [1] = 20000000, /* 20 MHz on osc0 */
+ [2] = 12000000, /* 12 MHz on osc1 */
+};
+
+/*
+ * The ATSTK1006 daughterboard is very similar to the ATSTK1002. Both
+ * have the AT32AP7000 chip on board; the difference is that the
+ * STK1006 has 128 MB SDRAM (the STK1002 uses the 8 MB SDRAM chip on
+ * the STK1000 motherboard) and 256 MB NAND flash (the STK1002 has
+ * none.)
+ *
+ * The RAM difference is handled by the boot loader, so the only
+ * difference we end up handling here is the NAND flash.
+ */
+#ifdef CONFIG_BOARD_ATSTK1006
+#include <linux/mtd/partitions.h>
+#include <asm/arch/smc.h>
+
+static struct smc_timing nand_timing __initdata = {
+ .ncs_read_setup = 0,
+ .nrd_setup = 10,
+ .ncs_write_setup = 0,
+ .nwe_setup = 10,
+
+ .ncs_read_pulse = 30,
+ .nrd_pulse = 15,
+ .ncs_write_pulse = 30,
+ .nwe_pulse = 15,
+
+ .read_cycle = 30,
+ .write_cycle = 30,
+
+ .ncs_read_recover = 0,
+ .nrd_recover = 15,
+ .ncs_write_recover = 0,
+ /* WE# high -> RE# low min 60 ns */
+ .nwe_recover = 50,
+};
+
+static struct smc_config nand_config __initdata = {
+ .bus_width = 1,
+ .nrd_controlled = 1,
+ .nwe_controlled = 1,
+ .nwait_mode = 0,
+ .byte_write = 0,
+ .tdf_cycles = 2,
+ .tdf_mode = 0,
+};
+
+static struct mtd_partition nand_partitions[] = {
+ {
+ .name = "main",
+ .offset = 0x00000000,
+ .size = MTDPART_SIZ_FULL,
+ },
+};
+
+static struct mtd_partition *nand_part_info(int size, int *num_partitions)
+{
+ *num_partitions = ARRAY_SIZE(nand_partitions);
+ return nand_partitions;
+}
+
+static struct atmel_nand_data atstk1006_nand_data __initdata = {
+ .cle = 21,
+ .ale = 22,
+ .rdy_pin = GPIO_PIN_PB(30),
+ .enable_pin = GPIO_PIN_PB(29),
+ .partition_info = nand_part_info,
+};
+#endif
struct eth_addr {
u8 addr[6];
@@ -83,6 +157,19 @@
} };
#endif
+static struct cf_platform_data __initdata cf0_data = {
+#ifdef CONFIG_BOARD_ATSTK1000_CF_HACKS
+ .detect_pin = CONFIG_BOARD_ATSTK1000_CF_DETECT_PIN,
+ .reset_pin = CONFIG_BOARD_ATSTK1000_CF_RESET_PIN,
+#else
+ .detect_pin = GPIO_PIN_NONE,
+ .reset_pin = GPIO_PIN_NONE,
+#endif
+ .vcc_pin = GPIO_PIN_NONE,
+ .ready_pin = GPIO_PIN_PB(27),
+ .cs = 4,
+};
+
/*
* The next two functions should go away as the boot loader is
* supposed to initialize the macb address registers with a valid
@@ -212,6 +299,12 @@
at32_add_system_devices();
+#ifdef CONFIG_BOARD_ATSTK1006
+ smc_set_timing(&nand_config, &nand_timing);
+ smc_set_configuration(3, &nand_config);
+ at32_add_device_nand(0, &atstk1006_nand_data);
+#endif
+
#ifdef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
at32_add_device_usart(1);
#else
@@ -228,16 +321,30 @@
#ifdef CONFIG_BOARD_ATSTK100X_SPI1
at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
#endif
+ at32_add_device_twi(0, NULL, 0);
+#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
+ at32_add_device_mci(0, NULL);
+#endif
#ifdef CONFIG_BOARD_ATSTK1002_SW5_CUSTOM
set_hw_addr(at32_add_device_eth(1, &eth_data[1]));
#else
at32_add_device_lcdc(0, &atstk1000_lcdc_data,
- fbmem_start, fbmem_size);
+ fbmem_start, fbmem_size, 0);
#endif
at32_add_device_usba(0, NULL);
+#ifdef CONFIG_BOARD_ATSTK100X_ENABLE_AC97
+ at32_add_device_ac97c(0);
+#else
+ at32_add_device_abdac(0);
+#endif
#ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
at32_add_device_ssc(0, ATMEL_SSC_TX);
#endif
+ at32_add_device_cf(0, 2, &cf0_data);
+#ifdef CONFIG_BOARD_ATSTK100X_ENABLE_PSIF
+ at32_add_device_psif(0);
+ at32_add_device_psif(1);
+#endif
atstk1000_setup_j2_leds();
atstk1002_setup_extdac();
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/boards/atstk1000/atstk1003.c avr32-2.6/arch/avr32/boards/atstk1000/atstk1003.c
--- linux-2.6.25.6/arch/avr32/boards/atstk1000/atstk1003.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/boards/atstk1000/atstk1003.c 2008-06-12 15:09:38.711815728 +0200
@@ -27,6 +27,13 @@
#include "atstk1000.h"
+/* Oscillator frequencies. These are board specific */
+unsigned long at32_board_osc_rates[3] = {
+ [0] = 32768, /* 32.768 kHz on RTC osc */
+ [1] = 20000000, /* 20 MHz on osc0 */
+ [2] = 12000000, /* 12 MHz on osc1 */
+};
+
#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
static struct at73c213_board_info at73c213_data = {
.ssc_id = 0,
@@ -59,6 +66,19 @@
} };
#endif
+static struct cf_platform_data __initdata cf0_data = {
+#ifdef CONFIG_BOARD_ATSTK1000_CF_HACKS
+ .detect_pin = CONFIG_BOARD_ATSTK1000_CF_DETECT_PIN,
+ .reset_pin = CONFIG_BOARD_ATSTK1000_CF_RESET_PIN,
+#else
+ .detect_pin = GPIO_PIN_NONE,
+ .reset_pin = GPIO_PIN_NONE,
+#endif
+ .vcc_pin = GPIO_PIN_NONE,
+ .ready_pin = GPIO_PIN_PB(27),
+ .cs = 4,
+};
+
#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
static void __init atstk1003_setup_extdac(void)
{
@@ -147,12 +167,22 @@
at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
#endif
#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
- at32_add_device_mci(0);
+ at32_add_device_mci(0, NULL);
#endif
at32_add_device_usba(0, NULL);
+#ifdef CONFIG_BOARD_ATSTK100X_ENABLE_AC97
+ at32_add_device_ac97c(0);
+#else
+ at32_add_device_abdac(0);
+#endif
#ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
at32_add_device_ssc(0, ATMEL_SSC_TX);
#endif
+ at32_add_device_cf(0, 2, &cf0_data);
+#ifdef CONFIG_BOARD_ATSTK100X_ENABLE_PSIF
+ at32_add_device_psif(0);
+ at32_add_device_psif(1);
+#endif
atstk1000_setup_j2_leds();
atstk1003_setup_extdac();
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/boards/atstk1000/atstk1004.c avr32-2.6/arch/avr32/boards/atstk1000/atstk1004.c
--- linux-2.6.25.6/arch/avr32/boards/atstk1000/atstk1004.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/boards/atstk1000/atstk1004.c 2008-06-12 15:09:38.715815679 +0200
@@ -29,6 +29,13 @@
#include "atstk1000.h"
+/* Oscillator frequencies. These are board specific */
+unsigned long at32_board_osc_rates[3] = {
+ [0] = 32768, /* 32.768 kHz on RTC osc */
+ [1] = 20000000, /* 20 MHz on osc0 */
+ [2] = 12000000, /* 12 MHz on osc1 */
+};
+
#ifdef CONFIG_BOARD_ATSTK1000_EXTDAC
static struct at73c213_board_info at73c213_data = {
.ssc_id = 0,
@@ -130,14 +137,23 @@
at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
#endif
#ifndef CONFIG_BOARD_ATSTK100X_SW2_CUSTOM
- at32_add_device_mci(0);
+ at32_add_device_mci(0, NULL);
#endif
at32_add_device_lcdc(0, &atstk1000_lcdc_data,
- fbmem_start, fbmem_size);
+ fbmem_start, fbmem_size, 0);
at32_add_device_usba(0, NULL);
+#ifdef CONFIG_BOARD_ATSTK100X_ENABLE_AC97
+ at32_add_device_ac97c(0);
+#else
+ at32_add_device_abdac(0);
+#endif
#ifndef CONFIG_BOARD_ATSTK100X_SW3_CUSTOM
at32_add_device_ssc(0, ATMEL_SSC_TX);
#endif
+#ifdef CONFIG_BOARD_ATSTK100X_ENABLE_PSIF
+ at32_add_device_psif(0);
+ at32_add_device_psif(1);
+#endif
atstk1000_setup_j2_leds();
atstk1004_setup_extdac();
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/boards/atstk1000/Kconfig avr32-2.6/arch/avr32/boards/atstk1000/Kconfig
--- linux-2.6.25.6/arch/avr32/boards/atstk1000/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/boards/atstk1000/Kconfig 2008-06-12 15:09:38.711815728 +0200
@@ -18,6 +18,10 @@
bool "ATSTK1004"
select CPU_AT32AP7002
+config BOARD_ATSTK1006
+ bool "ATSTK1006"
+ select CPU_AT32AP7000
+
endchoice
@@ -102,4 +106,60 @@
depends on !BOARD_ATSTK100X_SW1_CUSTOM && !BOARD_ATSTK100X_SW3_CUSTOM
default y
+config BOARD_ATSTK100X_ENABLE_AC97
+ bool "Use AC97C instead of ABDAC"
+ help
+ Select this if you want to use the built-in AC97 controller
+ instead of the built-in Audio Bitstream DAC. These share
+ the same I/O pins on the AP7000, so both can't be enabled
+ at the same time.
+
+ Note that the STK1000 kit doesn't ship with an AC97 codec on
+ board, so say N unless you've got an expansion board with an
+ AC97 codec on it that you want to use.
+
+config BOARD_ATSTK1000_CF_HACKS
+ bool "ATSTK1000 CompactFlash hacks"
+ depends on !BOARD_ATSTK100X_SW4_CUSTOM
+ help
+ Select this if you have re-routed the CompactFlash RESET and
+ CD signals to GPIOs on your STK1000. This is necessary for
+ reset and card detection to work properly, although some CF
+ cards may be able to cope without reset.
+
+config BOARD_ATSTK1000_CF_RESET_PIN
+ hex "CompactFlash RESET pin"
+ default 0x30
+ depends on BOARD_ATSTK1000_CF_HACKS
+ help
+ Select which GPIO pin to use for the CompactFlash RESET
+ signal. This is specified as a hexadecimal number and should
+ be defined as 0x20 * gpio_port + pin.
+
+ The default is 0x30, which is pin 16 on PIOB, aka GPIO14.
+
+config BOARD_ATSTK1000_CF_DETECT_PIN
+ hex "CompactFlash DETECT pin"
+ default 0x3e
+ depends on BOARD_ATSTK1000_CF_HACKS
+ help
+ Select which GPIO pin to use for the CompactFlash CD
+ signal. This is specified as a hexadecimal number and should
+ be defined as 0x20 * gpio_port + pin.
+
+ The default is 0x3e, which is pin 30 on PIOB, aka GPIO15.
+
+config BOARD_ATSTK100X_ENABLE_PSIF
+ bool "Enable PSIF peripheral (PS/2 support)"
+ default n
+ help
+ Select this if you want to use the PSIF peripheral to hook up PS/2
+ devices to your STK1000. This will require a hardware modification to
+ work correctly, since PS/2 devices require 5 volt power and signals,
+ while the STK1000 only provides 3.3 volt.
+
+ Say N if you have not modified the hardware to boost the voltage, say
+ Y if you have level convertion hardware or a PS/2 device capable of
+ operating on 3.3 volt.
+
endif # stk 1000
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/boards/atstk1000/Makefile avr32-2.6/arch/avr32/boards/atstk1000/Makefile
--- linux-2.6.25.6/arch/avr32/boards/atstk1000/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/boards/atstk1000/Makefile 2008-06-12 15:09:38.711815728 +0200
@@ -2,3 +2,4 @@
obj-$(CONFIG_BOARD_ATSTK1002) += atstk1002.o
obj-$(CONFIG_BOARD_ATSTK1003) += atstk1003.o
obj-$(CONFIG_BOARD_ATSTK1004) += atstk1004.o
+obj-$(CONFIG_BOARD_ATSTK1006) += atstk1002.o
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/configs/atngw100_defconfig avr32-2.6/arch/avr32/configs/atngw100_defconfig
--- linux-2.6.25.6/arch/avr32/configs/atngw100_defconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/configs/atngw100_defconfig 2008-06-12 15:09:38.715815679 +0200
@@ -1,7 +1,7 @@
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.24-rc7
-# Wed Jan 9 23:20:41 2008
+# Linux kernel version: 2.6.25.4
+# Wed Jun 11 15:23:36 2008
#
CONFIG_AVR32=y
CONFIG_GENERIC_GPIO=y
@@ -13,10 +13,10 @@
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
CONFIG_GENERIC_TIME=y
+CONFIG_GENERIC_CLOCKEVENTS=y
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
-CONFIG_ARCH_SUPPORTS_OPROFILE=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_BUG=y
@@ -37,17 +37,15 @@
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
# CONFIG_TASKSTATS is not set
-# CONFIG_USER_NS is not set
-# CONFIG_PID_NS is not set
# CONFIG_AUDIT is not set
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=14
# CONFIG_CGROUPS is not set
-CONFIG_FAIR_GROUP_SCHED=y
-CONFIG_FAIR_USER_SCHED=y
-# CONFIG_FAIR_CGROUP_SCHED is not set
+# CONFIG_GROUP_SCHED is not set
CONFIG_SYSFS_DEPRECATED=y
+CONFIG_SYSFS_DEPRECATED_V2=y
# CONFIG_RELAY is not set
+# CONFIG_NAMESPACES is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
@@ -61,11 +59,13 @@
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
+# CONFIG_COMPAT_BRK is not set
# CONFIG_BASE_FULL is not set
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
+CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
@@ -73,6 +73,14 @@
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
+CONFIG_PROFILING=y
+# CONFIG_MARKERS is not set
+CONFIG_OPROFILE=m
+CONFIG_HAVE_OPROFILE=y
+CONFIG_KPROBES=y
+CONFIG_HAVE_KPROBES=y
+# CONFIG_HAVE_KRETPROBES is not set
+CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
@@ -101,10 +109,15 @@
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
+CONFIG_CLASSIC_RCU=y
#
# System Type and features
#
+CONFIG_TICK_ONESHOT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SUBARCH_AVR32B=y
CONFIG_MMU=y
CONFIG_PERFORMANCE_COUNTERS=y
@@ -113,6 +126,7 @@
CONFIG_CPU_AT32AP7000=y
# CONFIG_BOARD_ATSTK1000 is not set
CONFIG_BOARD_ATNGW100=y
+CONFIG_BOARD_ATNGW100_I2C_GPIO=y
CONFIG_LOADER_U_BOOT=y
#
@@ -121,6 +135,7 @@
# CONFIG_AP700X_32_BIT_SMC is not set
CONFIG_AP700X_16_BIT_SMC=y
# CONFIG_AP700X_8_BIT_SMC is not set
+CONFIG_GPIO_DEV=y
CONFIG_LOAD_ADDRESS=0x10000000
CONFIG_ENTRY_ADDRESS=0x90000000
CONFIG_PHYS_OFFSET=0x10000000
@@ -146,16 +161,26 @@
CONFIG_ZONE_DMA_FLAG=0
CONFIG_VIRT_TO_BUS=y
# CONFIG_OWNERSHIP_TRACE is not set
+CONFIG_NMI_DEBUGGING=y
+CONFIG_DW_DMAC=y
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
+# CONFIG_SCHED_HRTICK is not set
CONFIG_CMDLINE=""
#
# Power management options
#
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_PM=y
+# CONFIG_PM_LEGACY is not set
+# CONFIG_PM_DEBUG is not set
+CONFIG_PM_SLEEP=y
+CONFIG_SUSPEND=y
+CONFIG_SUSPEND_FREEZER=y
#
# CPU Frequency scaling
@@ -164,9 +189,9 @@
CONFIG_CPU_FREQ_TABLE=y
# CONFIG_CPU_FREQ_DEBUG is not set
# CONFIG_CPU_FREQ_STAT is not set
-CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
-# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
@@ -202,6 +227,7 @@
CONFIG_XFRM_USER=y
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
+# CONFIG_XFRM_STATISTICS is not set
CONFIG_NET_KEY=y
# CONFIG_NET_KEY_MIGRATE is not set
CONFIG_INET=y
@@ -260,82 +286,33 @@
# CONFIG_NETWORK_SECMARK is not set
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
-CONFIG_BRIDGE_NETFILTER=y
+# CONFIG_NETFILTER_ADVANCED is not set
#
# Core Netfilter Configuration
#
-# CONFIG_NETFILTER_NETLINK is not set
-CONFIG_NF_CONNTRACK_ENABLED=m
+CONFIG_NETFILTER_NETLINK=m
+CONFIG_NETFILTER_NETLINK_LOG=m
CONFIG_NF_CONNTRACK=m
-CONFIG_NF_CT_ACCT=y
-CONFIG_NF_CONNTRACK_MARK=y
-# CONFIG_NF_CONNTRACK_EVENTS is not set
-CONFIG_NF_CT_PROTO_GRE=m
-# CONFIG_NF_CT_PROTO_SCTP is not set
-# CONFIG_NF_CT_PROTO_UDPLITE is not set
-CONFIG_NF_CONNTRACK_AMANDA=m
CONFIG_NF_CONNTRACK_FTP=m
-CONFIG_NF_CONNTRACK_H323=m
CONFIG_NF_CONNTRACK_IRC=m
-CONFIG_NF_CONNTRACK_NETBIOS_NS=m
-CONFIG_NF_CONNTRACK_PPTP=m
-CONFIG_NF_CONNTRACK_SANE=m
CONFIG_NF_CONNTRACK_SIP=m
-CONFIG_NF_CONNTRACK_TFTP=m
+CONFIG_NF_CT_NETLINK=m
CONFIG_NETFILTER_XTABLES=y
-CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
-# CONFIG_NETFILTER_XT_TARGET_CONNMARK is not set
-# CONFIG_NETFILTER_XT_TARGET_DSCP is not set
CONFIG_NETFILTER_XT_TARGET_MARK=m
-CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m
CONFIG_NETFILTER_XT_TARGET_NFLOG=m
-# CONFIG_NETFILTER_XT_TARGET_NOTRACK is not set
-# CONFIG_NETFILTER_XT_TARGET_TRACE is not set
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
-CONFIG_NETFILTER_XT_MATCH_COMMENT=m
-CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m
-# CONFIG_NETFILTER_XT_MATCH_CONNLIMIT is not set
-CONFIG_NETFILTER_XT_MATCH_CONNMARK=m
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
-# CONFIG_NETFILTER_XT_MATCH_DCCP is not set
-# CONFIG_NETFILTER_XT_MATCH_DSCP is not set
-CONFIG_NETFILTER_XT_MATCH_ESP=m
-CONFIG_NETFILTER_XT_MATCH_HELPER=m
-CONFIG_NETFILTER_XT_MATCH_LENGTH=m
-CONFIG_NETFILTER_XT_MATCH_LIMIT=m
-CONFIG_NETFILTER_XT_MATCH_MAC=m
CONFIG_NETFILTER_XT_MATCH_MARK=m
CONFIG_NETFILTER_XT_MATCH_POLICY=m
-CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m
-# CONFIG_NETFILTER_XT_MATCH_PHYSDEV is not set
-CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m
-CONFIG_NETFILTER_XT_MATCH_QUOTA=m
-CONFIG_NETFILTER_XT_MATCH_REALM=m
-# CONFIG_NETFILTER_XT_MATCH_SCTP is not set
CONFIG_NETFILTER_XT_MATCH_STATE=m
-CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
-CONFIG_NETFILTER_XT_MATCH_STRING=m
-CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
-# CONFIG_NETFILTER_XT_MATCH_TIME is not set
-# CONFIG_NETFILTER_XT_MATCH_U32 is not set
-CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m
#
# IP: Netfilter Configuration
#
CONFIG_NF_CONNTRACK_IPV4=m
CONFIG_NF_CONNTRACK_PROC_COMPAT=y
-# CONFIG_IP_NF_QUEUE is not set
CONFIG_IP_NF_IPTABLES=m
-CONFIG_IP_NF_MATCH_IPRANGE=m
-CONFIG_IP_NF_MATCH_TOS=m
-CONFIG_IP_NF_MATCH_RECENT=m
-CONFIG_IP_NF_MATCH_ECN=m
-CONFIG_IP_NF_MATCH_AH=m
-CONFIG_IP_NF_MATCH_TTL=m
-CONFIG_IP_NF_MATCH_OWNER=m
-CONFIG_IP_NF_MATCH_ADDRTYPE=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_LOG=m
@@ -343,54 +320,25 @@
CONFIG_NF_NAT=m
CONFIG_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=m
-CONFIG_IP_NF_TARGET_REDIRECT=m
-CONFIG_IP_NF_TARGET_NETMAP=m
-CONFIG_IP_NF_TARGET_SAME=m
-CONFIG_NF_NAT_SNMP_BASIC=m
-CONFIG_NF_NAT_PROTO_GRE=m
CONFIG_NF_NAT_FTP=m
CONFIG_NF_NAT_IRC=m
-CONFIG_NF_NAT_TFTP=m
-CONFIG_NF_NAT_AMANDA=m
-CONFIG_NF_NAT_PPTP=m
-CONFIG_NF_NAT_H323=m
+# CONFIG_NF_NAT_TFTP is not set
+# CONFIG_NF_NAT_AMANDA is not set
+# CONFIG_NF_NAT_PPTP is not set
+# CONFIG_NF_NAT_H323 is not set
CONFIG_NF_NAT_SIP=m
CONFIG_IP_NF_MANGLE=m
-CONFIG_IP_NF_TARGET_TOS=m
-CONFIG_IP_NF_TARGET_ECN=m
-CONFIG_IP_NF_TARGET_TTL=m
-CONFIG_IP_NF_TARGET_CLUSTERIP=m
-CONFIG_IP_NF_RAW=m
-CONFIG_IP_NF_ARPTABLES=m
-CONFIG_IP_NF_ARPFILTER=m
-CONFIG_IP_NF_ARP_MANGLE=m
#
-# IPv6: Netfilter Configuration (EXPERIMENTAL)
+# IPv6: Netfilter Configuration
#
CONFIG_NF_CONNTRACK_IPV6=m
-CONFIG_IP6_NF_QUEUE=m
CONFIG_IP6_NF_IPTABLES=m
-CONFIG_IP6_NF_MATCH_RT=m
-CONFIG_IP6_NF_MATCH_OPTS=m
-CONFIG_IP6_NF_MATCH_FRAG=m
-CONFIG_IP6_NF_MATCH_HL=m
-CONFIG_IP6_NF_MATCH_OWNER=m
CONFIG_IP6_NF_MATCH_IPV6HEADER=m
-CONFIG_IP6_NF_MATCH_AH=m
-CONFIG_IP6_NF_MATCH_MH=m
-CONFIG_IP6_NF_MATCH_EUI64=m
CONFIG_IP6_NF_FILTER=m
CONFIG_IP6_NF_TARGET_LOG=m
CONFIG_IP6_NF_TARGET_REJECT=m
CONFIG_IP6_NF_MANGLE=m
-CONFIG_IP6_NF_TARGET_HL=m
-CONFIG_IP6_NF_RAW=m
-
-#
-# Bridge: Netfilter Configuration
-#
-# CONFIG_BRIDGE_NF_EBTABLES is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_TIPC is not set
@@ -407,7 +355,6 @@
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_SCHED is not set
-CONFIG_NET_CLS_ROUTE=y
#
# Network testing
@@ -415,6 +362,7 @@
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_TCPPROBE is not set
# CONFIG_HAMRADIO is not set
+# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
@@ -531,11 +479,18 @@
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=4096
-CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024
+# CONFIG_BLK_DEV_XIP is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
-# CONFIG_MISC_DEVICES is not set
-# CONFIG_IDE is not set
+CONFIG_MISC_DEVICES=y
+# CONFIG_ATMEL_PWM is not set
+CONFIG_ATMEL_TCLIB=y
+CONFIG_ATMEL_TCB_CLKSRC=y
+CONFIG_ATMEL_TCB_CLKSRC_BLOCK=0
+# CONFIG_EEPROM_93CX6 is not set
+# CONFIG_ATMEL_SSC is not set
+# CONFIG_ENCLOSURE_SERVICES is not set
+# CONFIG_HAVE_IDE is not set
#
# SCSI device support
@@ -568,11 +523,13 @@
# CONFIG_SMSC_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_ICPLUS_PHY is not set
+# CONFIG_REALTEK_PHY is not set
# CONFIG_FIXED_PHY is not set
# CONFIG_MDIO_BITBANG is not set
CONFIG_NET_ETHERNET=y
# CONFIG_MII is not set
CONFIG_MACB=y
+# CONFIG_ENC28J60 is not set
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
@@ -599,7 +556,6 @@
# CONFIG_PPPOL2TP is not set
# CONFIG_SLIP is not set
CONFIG_SLHC=m
-# CONFIG_SHAPER is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
@@ -633,6 +589,7 @@
#
CONFIG_SERIAL_ATMEL=y
CONFIG_SERIAL_ATMEL_CONSOLE=y
+CONFIG_SERIAL_ATMEL_PDC=y
# CONFIG_SERIAL_ATMEL_TTYAT is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
@@ -640,8 +597,6 @@
# CONFIG_LEGACY_PTYS is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
-# CONFIG_RTC is not set
-# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
@@ -659,6 +614,7 @@
#
# I2C Hardware Bus support
#
+CONFIG_I2C_ATMELTWI=m
CONFIG_I2C_GPIO=m
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
@@ -669,13 +625,12 @@
#
# Miscellaneous I2C Chip support
#
-# CONFIG_SENSORS_DS1337 is not set
-# CONFIG_SENSORS_DS1374 is not set
# CONFIG_DS1682 is not set
# CONFIG_SENSORS_EEPROM is not set
# CONFIG_SENSORS_PCF8574 is not set
-# CONFIG_SENSORS_PCA9539 is not set
+# CONFIG_PCF8575 is not set
# CONFIG_SENSORS_PCF8591 is not set
+# CONFIG_TPS65010 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
@@ -702,9 +657,27 @@
# CONFIG_SPI_AT25 is not set
CONFIG_SPI_SPIDEV=m
# CONFIG_SPI_TLE62X0 is not set
+CONFIG_HAVE_GPIO_LIB=y
+
+#
+# GPIO Support
+#
+# CONFIG_DEBUG_GPIO is not set
+
+#
+# I2C GPIO expanders:
+#
+# CONFIG_GPIO_PCA953X is not set
+# CONFIG_GPIO_PCF857X is not set
+
+#
+# SPI GPIO expanders:
+#
+# CONFIG_GPIO_MCP23S08 is not set
# CONFIG_W1 is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
+# CONFIG_THERMAL is not set
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
@@ -757,10 +730,6 @@
#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#
-
-#
-# USB Gadget Support
-#
CONFIG_USB_GADGET=y
# CONFIG_USB_GADGET_DEBUG is not set
# CONFIG_USB_GADGET_DEBUG_FILES is not set
@@ -787,21 +756,24 @@
# CONFIG_USB_FILE_STORAGE_TEST is not set
CONFIG_USB_G_SERIAL=m
# CONFIG_USB_MIDI_GADGET is not set
-CONFIG_MMC=m
+# CONFIG_USB_G_PRINTER is not set
+CONFIG_MMC=y
# CONFIG_MMC_DEBUG is not set
# CONFIG_MMC_UNSAFE_RESUME is not set
#
# MMC/SD Card Drivers
#
-CONFIG_MMC_BLOCK=m
+CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_BOUNCE=y
# CONFIG_SDIO_UART is not set
#
# MMC/SD Host Controller Drivers
#
+CONFIG_MMC_ATMELMCI=y
CONFIG_MMC_SPI=m
+# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y
@@ -844,19 +816,22 @@
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
+# CONFIG_RTC_DRV_S35390A is not set
#
# SPI RTC drivers
#
-# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
+# CONFIG_RTC_DRV_R9701 is not set
+# CONFIG_RTC_DRV_RS5C348 is not set
#
# Platform RTC drivers
#
+# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
-# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_DS1742 is not set
+# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_V3020 is not set
@@ -874,25 +849,23 @@
#
# File systems
#
-CONFIG_EXT2_FS=m
+CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
-CONFIG_EXT3_FS=m
+CONFIG_EXT3_FS=y
# CONFIG_EXT3_FS_XATTR is not set
# CONFIG_EXT4DEV_FS is not set
-CONFIG_JBD=m
+CONFIG_JBD=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_FS_POSIX_ACL is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
-# CONFIG_MINIX_FS is not set
-# CONFIG_ROMFS_FS is not set
+# CONFIG_DNOTIFY is not set
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
-# CONFIG_DNOTIFY is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
CONFIG_FUSE_FS=m
@@ -923,7 +896,7 @@
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_HUGETLB_PAGE is not set
-CONFIG_CONFIGFS_FS=m
+CONFIG_CONFIGFS_FS=y
#
# Miscellaneous filesystems
@@ -948,8 +921,10 @@
# CONFIG_JFFS2_RUBIN is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
+# CONFIG_MINIX_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
+# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
@@ -1030,11 +1005,6 @@
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=m
# CONFIG_DLM is not set
-CONFIG_INSTRUMENTATION=y
-CONFIG_PROFILING=y
-CONFIG_OPROFILE=m
-CONFIG_KPROBES=y
-# CONFIG_MARKERS is not set
#
# Kernel hacking
@@ -1053,6 +1023,7 @@
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
# CONFIG_SLUB_DEBUG_ON is not set
+# CONFIG_SLUB_STATS is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
@@ -1069,9 +1040,10 @@
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_SG is not set
CONFIG_FRAME_POINTER=y
-# CONFIG_FORCED_INLINING is not set
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
+# CONFIG_KPROBES_SANITY_TEST is not set
+# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_LKDTM is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_SAMPLES is not set
@@ -1084,7 +1056,9 @@
# CONFIG_SECURITY_FILE_CAPABILITIES is not set
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
+CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_BLKCIPHER=y
+# CONFIG_CRYPTO_SEQIV is not set
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_HMAC=y
@@ -1103,6 +1077,9 @@
CONFIG_CRYPTO_PCBC=m
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_XTS is not set
+# CONFIG_CRYPTO_CTR is not set
+# CONFIG_CRYPTO_GCM is not set
+# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_DES=y
# CONFIG_CRYPTO_FCRYPT is not set
@@ -1117,12 +1094,14 @@
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_SEED is not set
+# CONFIG_CRYPTO_SALSA20 is not set
CONFIG_CRYPTO_DEFLATE=y
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_TEST is not set
-# CONFIG_CRYPTO_AUTHENC is not set
+CONFIG_CRYPTO_AUTHENC=y
+# CONFIG_CRYPTO_LZO is not set
CONFIG_CRYPTO_HW=y
#
@@ -1137,10 +1116,7 @@
# CONFIG_LIBCRC32C is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
-CONFIG_TEXTSEARCH=y
-CONFIG_TEXTSEARCH_KMP=m
-CONFIG_TEXTSEARCH_BM=m
-CONFIG_TEXTSEARCH_FSM=m
+CONFIG_GENERIC_ALLOCATOR=y
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/configs/atstk1002_defconfig avr32-2.6/arch/avr32/configs/atstk1002_defconfig
--- linux-2.6.25.6/arch/avr32/configs/atstk1002_defconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/configs/atstk1002_defconfig 2008-06-12 15:09:38.715815679 +0200
@@ -1,7 +1,7 @@
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.24-rc7
-# Wed Jan 9 23:07:43 2008
+# Linux kernel version: 2.6.25.4
+# Wed Jun 11 15:29:18 2008
#
CONFIG_AVR32=y
CONFIG_GENERIC_GPIO=y
@@ -13,10 +13,10 @@
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
CONFIG_GENERIC_TIME=y
+CONFIG_GENERIC_CLOCKEVENTS=y
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
-CONFIG_ARCH_SUPPORTS_OPROFILE=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_BUG=y
@@ -36,15 +36,15 @@
CONFIG_POSIX_MQUEUE=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
-# CONFIG_USER_NS is not set
-# CONFIG_PID_NS is not set
# CONFIG_AUDIT is not set
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=14
# CONFIG_CGROUPS is not set
-# CONFIG_FAIR_GROUP_SCHED is not set
+# CONFIG_GROUP_SCHED is not set
CONFIG_SYSFS_DEPRECATED=y
+CONFIG_SYSFS_DEPRECATED_V2=y
CONFIG_RELAY=y
+# CONFIG_NAMESPACES is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
@@ -58,11 +58,13 @@
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
+# CONFIG_COMPAT_BRK is not set
# CONFIG_BASE_FULL is not set
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
+CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
@@ -70,6 +72,14 @@
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
+CONFIG_PROFILING=y
+# CONFIG_MARKERS is not set
+CONFIG_OPROFILE=m
+CONFIG_HAVE_OPROFILE=y
+CONFIG_KPROBES=y
+CONFIG_HAVE_KPROBES=y
+# CONFIG_HAVE_KRETPROBES is not set
+CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
@@ -98,10 +108,15 @@
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
+CONFIG_CLASSIC_RCU=y
#
# System Type and features
#
+CONFIG_TICK_ONESHOT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SUBARCH_AVR32B=y
CONFIG_MMU=y
CONFIG_PERFORMANCE_COUNTERS=y
@@ -113,12 +128,16 @@
CONFIG_BOARD_ATSTK1002=y
# CONFIG_BOARD_ATSTK1003 is not set
# CONFIG_BOARD_ATSTK1004 is not set
+# CONFIG_BOARD_ATSTK1006 is not set
# CONFIG_BOARD_ATSTK100X_CUSTOM is not set
# CONFIG_BOARD_ATSTK100X_SPI1 is not set
# CONFIG_BOARD_ATSTK1000_J2_LED is not set
# CONFIG_BOARD_ATSTK1000_J2_LED8 is not set
# CONFIG_BOARD_ATSTK1000_J2_RGB is not set
CONFIG_BOARD_ATSTK1000_EXTDAC=y
+# CONFIG_BOARD_ATSTK100X_ENABLE_AC97 is not set
+# CONFIG_BOARD_ATSTK1000_CF_HACKS is not set
+# CONFIG_BOARD_ATSTK100X_ENABLE_PSIF is not set
CONFIG_LOADER_U_BOOT=y
#
@@ -127,6 +146,7 @@
# CONFIG_AP700X_32_BIT_SMC is not set
CONFIG_AP700X_16_BIT_SMC=y
# CONFIG_AP700X_8_BIT_SMC is not set
+CONFIG_GPIO_DEV=y
CONFIG_LOAD_ADDRESS=0x10000000
CONFIG_ENTRY_ADDRESS=0x90000000
CONFIG_PHYS_OFFSET=0x10000000
@@ -152,16 +172,26 @@
CONFIG_ZONE_DMA_FLAG=0
CONFIG_VIRT_TO_BUS=y
# CONFIG_OWNERSHIP_TRACE is not set
+CONFIG_NMI_DEBUGGING=y
+CONFIG_DW_DMAC=y
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
+# CONFIG_SCHED_HRTICK is not set
CONFIG_CMDLINE=""
#
# Power management options
#
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_PM=y
+# CONFIG_PM_LEGACY is not set
+# CONFIG_PM_DEBUG is not set
+CONFIG_PM_SLEEP=y
+CONFIG_SUSPEND=y
+CONFIG_SUSPEND_FREEZER=y
#
# CPU Frequency scaling
@@ -170,9 +200,9 @@
CONFIG_CPU_FREQ_TABLE=y
# CONFIG_CPU_FREQ_DEBUG is not set
# CONFIG_CPU_FREQ_STAT is not set
-CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
-# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
@@ -208,6 +238,7 @@
CONFIG_XFRM_USER=m
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
+# CONFIG_XFRM_STATISTICS is not set
CONFIG_NET_KEY=m
# CONFIG_NET_KEY_MIGRATE is not set
CONFIG_INET=y
@@ -279,6 +310,7 @@
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_TCPPROBE is not set
# CONFIG_HAMRADIO is not set
+# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
@@ -395,13 +427,18 @@
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=4096
-CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024
+# CONFIG_BLK_DEV_XIP is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
CONFIG_MISC_DEVICES=y
+CONFIG_ATMEL_PWM=m
+CONFIG_ATMEL_TCLIB=y
+CONFIG_ATMEL_TCB_CLKSRC=y
+CONFIG_ATMEL_TCB_CLKSRC_BLOCK=0
# CONFIG_EEPROM_93CX6 is not set
CONFIG_ATMEL_SSC=m
-# CONFIG_IDE is not set
+# CONFIG_ENCLOSURE_SERVICES is not set
+# CONFIG_HAVE_IDE is not set
#
# SCSI device support
@@ -444,6 +481,7 @@
# CONFIG_SCSI_LOWLEVEL is not set
CONFIG_ATA=m
# CONFIG_ATA_NONSTANDARD is not set
+# CONFIG_SATA_MV is not set
CONFIG_PATA_AT32=m
# CONFIG_PATA_PLATFORM is not set
# CONFIG_MD is not set
@@ -469,11 +507,13 @@
# CONFIG_SMSC_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_ICPLUS_PHY is not set
+# CONFIG_REALTEK_PHY is not set
# CONFIG_FIXED_PHY is not set
# CONFIG_MDIO_BITBANG is not set
CONFIG_NET_ETHERNET=y
# CONFIG_MII is not set
CONFIG_MACB=y
+# CONFIG_ENC28J60 is not set
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
@@ -500,7 +540,6 @@
# CONFIG_PPPOL2TP is not set
# CONFIG_SLIP is not set
CONFIG_SLHC=m
-# CONFIG_SHAPER is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
@@ -568,6 +607,7 @@
#
CONFIG_SERIAL_ATMEL=y
CONFIG_SERIAL_ATMEL_CONSOLE=y
+CONFIG_SERIAL_ATMEL_PDC=y
# CONFIG_SERIAL_ATMEL_TTYAT is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
@@ -575,8 +615,6 @@
# CONFIG_LEGACY_PTYS is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
-# CONFIG_RTC is not set
-# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
@@ -594,6 +632,7 @@
#
# I2C Hardware Bus support
#
+CONFIG_I2C_ATMELTWI=m
CONFIG_I2C_GPIO=m
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
@@ -604,13 +643,12 @@
#
# Miscellaneous I2C Chip support
#
-# CONFIG_SENSORS_DS1337 is not set
-# CONFIG_SENSORS_DS1374 is not set
# CONFIG_DS1682 is not set
# CONFIG_SENSORS_EEPROM is not set
# CONFIG_SENSORS_PCF8574 is not set
-# CONFIG_SENSORS_PCA9539 is not set
+# CONFIG_PCF8575 is not set
# CONFIG_SENSORS_PCF8591 is not set
+# CONFIG_TPS65010 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
@@ -637,9 +675,27 @@
# CONFIG_SPI_AT25 is not set
CONFIG_SPI_SPIDEV=m
# CONFIG_SPI_TLE62X0 is not set
+CONFIG_HAVE_GPIO_LIB=y
+
+#
+# GPIO Support
+#
+# CONFIG_DEBUG_GPIO is not set
+
+#
+# I2C GPIO expanders:
+#
+# CONFIG_GPIO_PCA953X is not set
+# CONFIG_GPIO_PCF857X is not set
+
+#
+# SPI GPIO expanders:
+#
+# CONFIG_GPIO_MCP23S08 is not set
# CONFIG_W1 is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
+# CONFIG_THERMAL is not set
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
@@ -732,12 +788,18 @@
#
# Generic devices
#
+CONFIG_SND_AC97_CODEC=m
# CONFIG_SND_DUMMY is not set
# CONFIG_SND_MTPAV is not set
# CONFIG_SND_SERIAL_U16550 is not set
# CONFIG_SND_MPU401 is not set
#
+# AVR32 devices
+#
+CONFIG_SND_ATMEL_AC97=m
+
+#
# SPI devices
#
CONFIG_SND_AT73C213=m
@@ -753,9 +815,14 @@
#
#
+# ALSA SoC audio for Freescale SOCs
+#
+
+#
# Open Sound System
#
# CONFIG_SOUND_PRIME is not set
+CONFIG_AC97_BUS=m
# CONFIG_HID_SUPPORT is not set
CONFIG_USB_SUPPORT=y
# CONFIG_USB_ARCH_HAS_HCD is not set
@@ -765,10 +832,6 @@
#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#
-
-#
-# USB Gadget Support
-#
CONFIG_USB_GADGET=y
# CONFIG_USB_GADGET_DEBUG is not set
# CONFIG_USB_GADGET_DEBUG_FILES is not set
@@ -796,27 +859,31 @@
# CONFIG_USB_FILE_STORAGE_TEST is not set
CONFIG_USB_G_SERIAL=m
# CONFIG_USB_MIDI_GADGET is not set
-CONFIG_MMC=m
+# CONFIG_USB_G_PRINTER is not set
+CONFIG_MMC=y
# CONFIG_MMC_DEBUG is not set
# CONFIG_MMC_UNSAFE_RESUME is not set
#
# MMC/SD Card Drivers
#
-CONFIG_MMC_BLOCK=m
+CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_BOUNCE=y
# CONFIG_SDIO_UART is not set
#
# MMC/SD Host Controller Drivers
#
+CONFIG_MMC_ATMELMCI=y
CONFIG_MMC_SPI=m
+# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=m
#
# LED drivers
#
+CONFIG_LEDS_ATMEL_PWM=m
CONFIG_LEDS_GPIO=m
#
@@ -853,19 +920,22 @@
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
+# CONFIG_RTC_DRV_S35390A is not set
#
# SPI RTC drivers
#
-# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
+# CONFIG_RTC_DRV_R9701 is not set
+# CONFIG_RTC_DRV_RS5C348 is not set
#
# Platform RTC drivers
#
+# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
-# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_DS1742 is not set
+# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_V3020 is not set
@@ -883,13 +953,13 @@
#
# File systems
#
-CONFIG_EXT2_FS=m
+CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
-CONFIG_EXT3_FS=m
+CONFIG_EXT3_FS=y
# CONFIG_EXT3_FS_XATTR is not set
# CONFIG_EXT4DEV_FS is not set
-CONFIG_JBD=m
+CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
@@ -897,12 +967,10 @@
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
-CONFIG_MINIX_FS=m
-# CONFIG_ROMFS_FS is not set
+# CONFIG_DNOTIFY is not set
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
-# CONFIG_DNOTIFY is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
CONFIG_FUSE_FS=m
@@ -933,7 +1001,7 @@
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_HUGETLB_PAGE is not set
-# CONFIG_CONFIGFS_FS is not set
+CONFIG_CONFIGFS_FS=y
#
# Miscellaneous filesystems
@@ -957,8 +1025,10 @@
# CONFIG_JFFS2_RUBIN is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
+CONFIG_MINIX_FS=m
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
+# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
@@ -1028,11 +1098,6 @@
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=m
# CONFIG_DLM is not set
-CONFIG_INSTRUMENTATION=y
-CONFIG_PROFILING=y
-CONFIG_OPROFILE=m
-CONFIG_KPROBES=y
-# CONFIG_MARKERS is not set
#
# Kernel hacking
@@ -1051,6 +1116,7 @@
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
# CONFIG_SLUB_DEBUG_ON is not set
+# CONFIG_SLUB_STATS is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
@@ -1067,9 +1133,10 @@
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_SG is not set
CONFIG_FRAME_POINTER=y
-CONFIG_FORCED_INLINING=y
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
+# CONFIG_KPROBES_SANITY_TEST is not set
+# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_LKDTM is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_SAMPLES is not set
@@ -1082,7 +1149,9 @@
# CONFIG_SECURITY_FILE_CAPABILITIES is not set
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=m
+CONFIG_CRYPTO_AEAD=m
CONFIG_CRYPTO_BLKCIPHER=m
+# CONFIG_CRYPTO_SEQIV is not set
CONFIG_CRYPTO_HASH=m
CONFIG_CRYPTO_MANAGER=m
CONFIG_CRYPTO_HMAC=m
@@ -1101,6 +1170,9 @@
# CONFIG_CRYPTO_PCBC is not set
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_XTS is not set
+# CONFIG_CRYPTO_CTR is not set
+# CONFIG_CRYPTO_GCM is not set
+# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_DES=m
# CONFIG_CRYPTO_FCRYPT is not set
@@ -1115,12 +1187,14 @@
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_SEED is not set
+# CONFIG_CRYPTO_SALSA20 is not set
CONFIG_CRYPTO_DEFLATE=m
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_TEST is not set
-# CONFIG_CRYPTO_AUTHENC is not set
+CONFIG_CRYPTO_AUTHENC=m
+# CONFIG_CRYPTO_LZO is not set
# CONFIG_CRYPTO_HW is not set
#
@@ -1135,6 +1209,7 @@
# CONFIG_LIBCRC32C is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
+CONFIG_GENERIC_ALLOCATOR=y
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/configs/atstk1003_defconfig avr32-2.6/arch/avr32/configs/atstk1003_defconfig
--- linux-2.6.25.6/arch/avr32/configs/atstk1003_defconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/configs/atstk1003_defconfig 2008-06-12 15:09:38.715815679 +0200
@@ -1,7 +1,7 @@
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.24-rc7
-# Wed Jan 9 22:54:34 2008
+# Linux kernel version: 2.6.25.4
+# Wed Jun 11 15:33:36 2008
#
CONFIG_AVR32=y
CONFIG_GENERIC_GPIO=y
@@ -13,10 +13,10 @@
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
CONFIG_GENERIC_TIME=y
+CONFIG_GENERIC_CLOCKEVENTS=y
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
-CONFIG_ARCH_SUPPORTS_OPROFILE=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_BUG=y
@@ -39,17 +39,15 @@
CONFIG_TASKSTATS=y
CONFIG_TASK_DELAY_ACCT=y
# CONFIG_TASK_XACCT is not set
-# CONFIG_USER_NS is not set
-# CONFIG_PID_NS is not set
CONFIG_AUDIT=y
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=14
# CONFIG_CGROUPS is not set
-CONFIG_FAIR_GROUP_SCHED=y
-CONFIG_FAIR_USER_SCHED=y
-# CONFIG_FAIR_CGROUP_SCHED is not set
+# CONFIG_GROUP_SCHED is not set
CONFIG_SYSFS_DEPRECATED=y
+CONFIG_SYSFS_DEPRECATED_V2=y
CONFIG_RELAY=y
+# CONFIG_NAMESPACES is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
@@ -63,11 +61,13 @@
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
+# CONFIG_COMPAT_BRK is not set
# CONFIG_BASE_FULL is not set
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
+CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
@@ -75,6 +75,14 @@
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
+CONFIG_PROFILING=y
+# CONFIG_MARKERS is not set
+CONFIG_OPROFILE=m
+CONFIG_HAVE_OPROFILE=y
+CONFIG_KPROBES=y
+CONFIG_HAVE_KPROBES=y
+# CONFIG_HAVE_KRETPROBES is not set
+CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
@@ -103,10 +111,15 @@
CONFIG_DEFAULT_CFQ=y
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="cfq"
+CONFIG_CLASSIC_RCU=y
#
# System Type and features
#
+CONFIG_TICK_ONESHOT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SUBARCH_AVR32B=y
CONFIG_MMU=y
CONFIG_PERFORMANCE_COUNTERS=y
@@ -118,12 +131,16 @@
# CONFIG_BOARD_ATSTK1002 is not set
CONFIG_BOARD_ATSTK1003=y
# CONFIG_BOARD_ATSTK1004 is not set
+# CONFIG_BOARD_ATSTK1006 is not set
# CONFIG_BOARD_ATSTK100X_CUSTOM is not set
# CONFIG_BOARD_ATSTK100X_SPI1 is not set
# CONFIG_BOARD_ATSTK1000_J2_LED is not set
# CONFIG_BOARD_ATSTK1000_J2_LED8 is not set
# CONFIG_BOARD_ATSTK1000_J2_RGB is not set
CONFIG_BOARD_ATSTK1000_EXTDAC=y
+# CONFIG_BOARD_ATSTK100X_ENABLE_AC97 is not set
+# CONFIG_BOARD_ATSTK1000_CF_HACKS is not set
+# CONFIG_BOARD_ATSTK100X_ENABLE_PSIF is not set
CONFIG_LOADER_U_BOOT=y
#
@@ -132,6 +149,7 @@
# CONFIG_AP700X_32_BIT_SMC is not set
CONFIG_AP700X_16_BIT_SMC=y
# CONFIG_AP700X_8_BIT_SMC is not set
+CONFIG_GPIO_DEV=y
CONFIG_LOAD_ADDRESS=0x10000000
CONFIG_ENTRY_ADDRESS=0x90000000
CONFIG_PHYS_OFFSET=0x10000000
@@ -157,16 +175,26 @@
CONFIG_ZONE_DMA_FLAG=0
CONFIG_VIRT_TO_BUS=y
# CONFIG_OWNERSHIP_TRACE is not set
+CONFIG_NMI_DEBUGGING=y
+CONFIG_DW_DMAC=y
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
+# CONFIG_SCHED_HRTICK is not set
CONFIG_CMDLINE=""
#
# Power management options
#
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_PM=y
+# CONFIG_PM_LEGACY is not set
+# CONFIG_PM_DEBUG is not set
+CONFIG_PM_SLEEP=y
+CONFIG_SUSPEND=y
+CONFIG_SUSPEND_FREEZER=y
#
# CPU Frequency scaling
@@ -175,9 +203,9 @@
CONFIG_CPU_FREQ_TABLE=y
# CONFIG_CPU_FREQ_DEBUG is not set
# CONFIG_CPU_FREQ_STAT is not set
-CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
-# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
@@ -260,6 +288,7 @@
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_TCPPROBE is not set
# CONFIG_HAMRADIO is not set
+# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
@@ -376,13 +405,18 @@
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=4096
-CONFIG_BLK_DEV_RAM_BLOCKSIZE=1024
+# CONFIG_BLK_DEV_XIP is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
CONFIG_MISC_DEVICES=y
+CONFIG_ATMEL_PWM=m
+CONFIG_ATMEL_TCLIB=y
+CONFIG_ATMEL_TCB_CLKSRC=y
+CONFIG_ATMEL_TCB_CLKSRC_BLOCK=0
# CONFIG_EEPROM_93CX6 is not set
CONFIG_ATMEL_SSC=m
-# CONFIG_IDE is not set
+# CONFIG_ENCLOSURE_SERVICES is not set
+# CONFIG_HAVE_IDE is not set
#
# SCSI device support
@@ -427,6 +461,7 @@
# CONFIG_SCSI_DEBUG is not set
CONFIG_ATA=m
# CONFIG_ATA_NONSTANDARD is not set
+# CONFIG_SATA_MV is not set
CONFIG_PATA_AT32=m
# CONFIG_PATA_PLATFORM is not set
# CONFIG_MD is not set
@@ -460,7 +495,6 @@
# CONFIG_PPPOL2TP is not set
# CONFIG_SLIP is not set
CONFIG_SLHC=m
-# CONFIG_SHAPER is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
@@ -528,6 +562,7 @@
#
CONFIG_SERIAL_ATMEL=y
CONFIG_SERIAL_ATMEL_CONSOLE=y
+CONFIG_SERIAL_ATMEL_PDC=y
# CONFIG_SERIAL_ATMEL_TTYAT is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
@@ -535,8 +570,6 @@
# CONFIG_LEGACY_PTYS is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
-# CONFIG_RTC is not set
-# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
@@ -554,6 +587,7 @@
#
# I2C Hardware Bus support
#
+CONFIG_I2C_ATMELTWI=m
CONFIG_I2C_GPIO=m
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
@@ -564,13 +598,12 @@
#
# Miscellaneous I2C Chip support
#
-# CONFIG_SENSORS_DS1337 is not set
-# CONFIG_SENSORS_DS1374 is not set
# CONFIG_DS1682 is not set
# CONFIG_SENSORS_EEPROM is not set
# CONFIG_SENSORS_PCF8574 is not set
-# CONFIG_SENSORS_PCA9539 is not set
+# CONFIG_PCF8575 is not set
# CONFIG_SENSORS_PCF8591 is not set
+# CONFIG_TPS65010 is not set
# CONFIG_SENSORS_MAX6875 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
@@ -597,9 +630,27 @@
# CONFIG_SPI_AT25 is not set
CONFIG_SPI_SPIDEV=m
# CONFIG_SPI_TLE62X0 is not set
+CONFIG_HAVE_GPIO_LIB=y
+
+#
+# GPIO Support
+#
+# CONFIG_DEBUG_GPIO is not set
+
+#
+# I2C GPIO expanders:
+#
+# CONFIG_GPIO_PCA953X is not set
+# CONFIG_GPIO_PCF857X is not set
+
+#
+# SPI GPIO expanders:
+#
+# CONFIG_GPIO_MCP23S08 is not set
# CONFIG_W1 is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
+# CONFIG_THERMAL is not set
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
@@ -665,12 +716,18 @@
#
# Generic devices
#
+CONFIG_SND_AC97_CODEC=m
# CONFIG_SND_DUMMY is not set
# CONFIG_SND_MTPAV is not set
# CONFIG_SND_SERIAL_U16550 is not set
# CONFIG_SND_MPU401 is not set
#
+# AVR32 devices
+#
+CONFIG_SND_ATMEL_AC97=m
+
+#
# SPI devices
#
CONFIG_SND_AT73C213=m
@@ -686,9 +743,14 @@
#
#
+# ALSA SoC audio for Freescale SOCs
+#
+
+#
# Open Sound System
#
# CONFIG_SOUND_PRIME is not set
+CONFIG_AC97_BUS=m
# CONFIG_HID_SUPPORT is not set
CONFIG_USB_SUPPORT=y
# CONFIG_USB_ARCH_HAS_HCD is not set
@@ -698,10 +760,6 @@
#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#
-
-#
-# USB Gadget Support
-#
CONFIG_USB_GADGET=y
# CONFIG_USB_GADGET_DEBUG is not set
# CONFIG_USB_GADGET_DEBUG_FILES is not set
@@ -729,27 +787,31 @@
# CONFIG_USB_FILE_STORAGE_TEST is not set
CONFIG_USB_G_SERIAL=m
# CONFIG_USB_MIDI_GADGET is not set
-CONFIG_MMC=m
+# CONFIG_USB_G_PRINTER is not set
+CONFIG_MMC=y
# CONFIG_MMC_DEBUG is not set
# CONFIG_MMC_UNSAFE_RESUME is not set
#
# MMC/SD Card Drivers
#
-CONFIG_MMC_BLOCK=m
+CONFIG_MMC_BLOCK=y
# CONFIG_MMC_BLOCK_BOUNCE is not set
# CONFIG_SDIO_UART is not set
#
# MMC/SD Host Controller Drivers
#
+CONFIG_MMC_ATMELMCI=y
CONFIG_MMC_SPI=m
+# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y
#
# LED drivers
#
+CONFIG_LEDS_ATMEL_PWM=m
CONFIG_LEDS_GPIO=y
#
@@ -786,19 +848,22 @@
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
+# CONFIG_RTC_DRV_S35390A is not set
#
# SPI RTC drivers
#
-# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
+# CONFIG_RTC_DRV_R9701 is not set
+# CONFIG_RTC_DRV_RS5C348 is not set
#
# Platform RTC drivers
#
+# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
-# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_DS1742 is not set
+# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_V3020 is not set
@@ -816,13 +881,13 @@
#
# File systems
#
-CONFIG_EXT2_FS=m
+CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
-CONFIG_EXT3_FS=m
+CONFIG_EXT3_FS=y
# CONFIG_EXT3_FS_XATTR is not set
# CONFIG_EXT4DEV_FS is not set
-CONFIG_JBD=m
+CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
@@ -830,12 +895,10 @@
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
-# CONFIG_MINIX_FS is not set
-# CONFIG_ROMFS_FS is not set
+# CONFIG_DNOTIFY is not set
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
-# CONFIG_DNOTIFY is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
CONFIG_FUSE_FS=m
@@ -866,7 +929,7 @@
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_HUGETLB_PAGE is not set
-CONFIG_CONFIGFS_FS=m
+CONFIG_CONFIGFS_FS=y
#
# Miscellaneous filesystems
@@ -891,8 +954,10 @@
# CONFIG_JFFS2_RUBIN is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
+# CONFIG_MINIX_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
+# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_NETWORK_FILESYSTEMS is not set
@@ -943,11 +1008,6 @@
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=m
# CONFIG_DLM is not set
-CONFIG_INSTRUMENTATION=y
-CONFIG_PROFILING=y
-CONFIG_OPROFILE=m
-CONFIG_KPROBES=y
-# CONFIG_MARKERS is not set
#
# Kernel hacking
@@ -965,6 +1025,7 @@
CONFIG_SCHED_DEBUG=y
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
+# CONFIG_SLUB_STATS is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
@@ -981,9 +1042,10 @@
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_SG is not set
CONFIG_FRAME_POINTER=y
-CONFIG_FORCED_INLINING=y
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
+# CONFIG_KPROBES_SANITY_TEST is not set
+# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_LKDTM is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_SAMPLES is not set
@@ -1009,6 +1071,7 @@
CONFIG_AUDIT_GENERIC=y
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
+CONFIG_GENERIC_ALLOCATOR=y
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/configs/atstk1004_defconfig avr32-2.6/arch/avr32/configs/atstk1004_defconfig
--- linux-2.6.25.6/arch/avr32/configs/atstk1004_defconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/configs/atstk1004_defconfig 2008-06-12 15:09:38.719815350 +0200
@@ -1,7 +1,7 @@
#
# Automatically generated make config: don't edit
-# Linux kernel version: 2.6.24-rc7
-# Wed Jan 9 23:04:20 2008
+# Linux kernel version: 2.6.25.4
+# Wed Jun 11 15:37:49 2008
#
CONFIG_AVR32=y
CONFIG_GENERIC_GPIO=y
@@ -13,10 +13,10 @@
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
CONFIG_GENERIC_TIME=y
+CONFIG_GENERIC_CLOCKEVENTS=y
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
-CONFIG_ARCH_SUPPORTS_OPROFILE=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_GENERIC_BUG=y
@@ -34,15 +34,15 @@
# CONFIG_POSIX_MQUEUE is not set
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
-# CONFIG_USER_NS is not set
-# CONFIG_PID_NS is not set
# CONFIG_AUDIT is not set
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=14
# CONFIG_CGROUPS is not set
-# CONFIG_FAIR_GROUP_SCHED is not set
+# CONFIG_GROUP_SCHED is not set
CONFIG_SYSFS_DEPRECATED=y
+CONFIG_SYSFS_DEPRECATED_V2=y
# CONFIG_RELAY is not set
+# CONFIG_NAMESPACES is not set
# CONFIG_BLK_DEV_INITRD is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
@@ -54,24 +54,37 @@
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
+# CONFIG_COMPAT_BRK is not set
# CONFIG_BASE_FULL is not set
# CONFIG_FUTEX is not set
# CONFIG_EPOLL is not set
# CONFIG_SIGNALFD is not set
+# CONFIG_TIMERFD is not set
# CONFIG_EVENTFD is not set
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
# CONFIG_SLAB is not set
# CONFIG_SLUB is not set
CONFIG_SLOB=y
+# CONFIG_PROFILING is not set
+# CONFIG_MARKERS is not set
+CONFIG_HAVE_OPROFILE=y
+CONFIG_HAVE_KPROBES=y
+# CONFIG_HAVE_KRETPROBES is not set
+# CONFIG_PROC_PAGE_MONITOR is not set
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=1
# CONFIG_MODULES is not set
# CONFIG_BLOCK is not set
+CONFIG_CLASSIC_RCU=y
#
# System Type and features
#
+# CONFIG_TICK_ONESHOT is not set
+# CONFIG_NO_HZ is not set
+# CONFIG_HIGH_RES_TIMERS is not set
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SUBARCH_AVR32B=y
CONFIG_MMU=y
CONFIG_PERFORMANCE_COUNTERS=y
@@ -83,10 +96,14 @@
# CONFIG_BOARD_ATSTK1002 is not set
# CONFIG_BOARD_ATSTK1003 is not set
CONFIG_BOARD_ATSTK1004=y
+# CONFIG_BOARD_ATSTK1006 is not set
# CONFIG_BOARD_ATSTK100X_CUSTOM is not set
# CONFIG_BOARD_ATSTK100X_SPI1 is not set
# CONFIG_BOARD_ATSTK1000_J2_LED is not set
CONFIG_BOARD_ATSTK1000_EXTDAC=y
+# CONFIG_BOARD_ATSTK100X_ENABLE_AC97 is not set
+# CONFIG_BOARD_ATSTK1000_CF_HACKS is not set
+# CONFIG_BOARD_ATSTK100X_ENABLE_PSIF is not set
CONFIG_LOADER_U_BOOT=y
#
@@ -95,6 +112,7 @@
# CONFIG_AP700X_32_BIT_SMC is not set
CONFIG_AP700X_16_BIT_SMC=y
# CONFIG_AP700X_8_BIT_SMC is not set
+# CONFIG_GPIO_DEV is not set
CONFIG_LOAD_ADDRESS=0x10000000
CONFIG_ENTRY_ADDRESS=0x90000000
CONFIG_PHYS_OFFSET=0x10000000
@@ -120,34 +138,26 @@
CONFIG_ZONE_DMA_FLAG=0
CONFIG_VIRT_TO_BUS=y
# CONFIG_OWNERSHIP_TRACE is not set
+# CONFIG_NMI_DEBUGGING is not set
+CONFIG_DW_DMAC=y
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
+# CONFIG_SCHED_HRTICK is not set
CONFIG_CMDLINE=""
#
# Power management options
#
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+# CONFIG_PM is not set
#
# CPU Frequency scaling
#
-CONFIG_CPU_FREQ=y
-CONFIG_CPU_FREQ_TABLE=y
-# CONFIG_CPU_FREQ_DEBUG is not set
-# CONFIG_CPU_FREQ_STAT is not set
-CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE=y
-# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
-# CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND is not set
-# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
-CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
-# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
-CONFIG_CPU_FREQ_GOV_USERSPACE=y
-CONFIG_CPU_FREQ_GOV_ONDEMAND=y
-# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
-CONFIG_CPU_FREQ_AT32AP=y
+# CONFIG_CPU_FREQ is not set
#
# Bus options
@@ -222,6 +232,7 @@
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
+# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
@@ -321,6 +332,7 @@
# CONFIG_MTD_UBI is not set
# CONFIG_PARPORT is not set
# CONFIG_MISC_DEVICES is not set
+# CONFIG_HAVE_IDE is not set
#
# SCSI device support
@@ -358,6 +370,7 @@
#
CONFIG_SERIAL_ATMEL=y
CONFIG_SERIAL_ATMEL_CONSOLE=y
+# CONFIG_SERIAL_ATMEL_PDC is not set
# CONFIG_SERIAL_ATMEL_TTYAT is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
@@ -365,8 +378,6 @@
# CONFIG_LEGACY_PTYS is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
-# CONFIG_RTC is not set
-# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_TCG_TPM is not set
# CONFIG_I2C is not set
@@ -389,9 +400,24 @@
# CONFIG_SPI_AT25 is not set
# CONFIG_SPI_SPIDEV is not set
# CONFIG_SPI_TLE62X0 is not set
+CONFIG_HAVE_GPIO_LIB=y
+
+#
+# GPIO Support
+#
+
+#
+# I2C GPIO expanders:
+#
+
+#
+# SPI GPIO expanders:
+#
+# CONFIG_GPIO_MCP23S08 is not set
# CONFIG_W1 is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
+# CONFIG_THERMAL is not set
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
@@ -471,10 +497,6 @@
#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#
-
-#
-# USB Gadget Support
-#
CONFIG_USB_GADGET=y
# CONFIG_USB_GADGET_DEBUG_FILES is not set
CONFIG_USB_GADGET_SELECTED=y
@@ -499,7 +521,9 @@
# CONFIG_USB_FILE_STORAGE is not set
# CONFIG_USB_G_SERIAL is not set
# CONFIG_USB_MIDI_GADGET is not set
+# CONFIG_USB_G_PRINTER is not set
# CONFIG_MMC is not set
+# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
@@ -519,15 +543,17 @@
#
# SPI RTC drivers
#
-# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
+# CONFIG_RTC_DRV_R9701 is not set
+# CONFIG_RTC_DRV_RS5C348 is not set
#
# Platform RTC drivers
#
+# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
-# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_DS1742 is not set
+# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_V3020 is not set
@@ -545,9 +571,9 @@
#
# File systems
#
+# CONFIG_DNOTIFY is not set
# CONFIG_INOTIFY is not set
# CONFIG_QUOTA is not set
-# CONFIG_DNOTIFY is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set
@@ -580,7 +606,6 @@
# CONFIG_NETWORK_FILESYSTEMS is not set
# CONFIG_NLS is not set
# CONFIG_DLM is not set
-# CONFIG_INSTRUMENTATION is not set
#
# Kernel hacking
@@ -616,6 +641,7 @@
# CONFIG_LIBCRC32C is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
+CONFIG_GENERIC_ALLOCATOR=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/configs/atstk1006_defconfig avr32-2.6/arch/avr32/configs/atstk1006_defconfig
--- linux-2.6.25.6/arch/avr32/configs/atstk1006_defconfig 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/configs/atstk1006_defconfig 2008-06-12 15:09:38.719815350 +0200
@@ -0,0 +1,1235 @@
+#
+# Automatically generated make config: don't edit
+# Linux kernel version: 2.6.25.4
+# Wed Jun 11 15:40:45 2008
+#
+CONFIG_AVR32=y
+CONFIG_GENERIC_GPIO=y
+CONFIG_GENERIC_HARDIRQS=y
+CONFIG_STACKTRACE_SUPPORT=y
+CONFIG_LOCKDEP_SUPPORT=y
+CONFIG_TRACE_IRQFLAGS_SUPPORT=y
+CONFIG_HARDIRQS_SW_RESEND=y
+CONFIG_GENERIC_IRQ_PROBE=y
+CONFIG_RWSEM_GENERIC_SPINLOCK=y
+CONFIG_GENERIC_TIME=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
+# CONFIG_ARCH_HAS_ILOG2_U32 is not set
+# CONFIG_ARCH_HAS_ILOG2_U64 is not set
+CONFIG_GENERIC_HWEIGHT=y
+CONFIG_GENERIC_CALIBRATE_DELAY=y
+CONFIG_GENERIC_BUG=y
+CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
+
+#
+# General setup
+#
+CONFIG_EXPERIMENTAL=y
+CONFIG_BROKEN_ON_SMP=y
+CONFIG_INIT_ENV_ARG_LIMIT=32
+CONFIG_LOCALVERSION=""
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_SWAP=y
+CONFIG_SYSVIPC=y
+CONFIG_SYSVIPC_SYSCTL=y
+CONFIG_POSIX_MQUEUE=y
+# CONFIG_BSD_PROCESS_ACCT is not set
+# CONFIG_TASKSTATS is not set
+# CONFIG_AUDIT is not set
+# CONFIG_IKCONFIG is not set
+CONFIG_LOG_BUF_SHIFT=14
+# CONFIG_CGROUPS is not set
+# CONFIG_GROUP_SCHED is not set
+CONFIG_SYSFS_DEPRECATED=y
+CONFIG_SYSFS_DEPRECATED_V2=y
+CONFIG_RELAY=y
+# CONFIG_NAMESPACES is not set
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_INITRAMFS_SOURCE=""
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_SYSCTL=y
+CONFIG_EMBEDDED=y
+# CONFIG_SYSCTL_SYSCALL is not set
+CONFIG_KALLSYMS=y
+# CONFIG_KALLSYMS_ALL is not set
+# CONFIG_KALLSYMS_EXTRA_PASS is not set
+CONFIG_HOTPLUG=y
+CONFIG_PRINTK=y
+CONFIG_BUG=y
+CONFIG_ELF_CORE=y
+# CONFIG_COMPAT_BRK is not set
+# CONFIG_BASE_FULL is not set
+CONFIG_FUTEX=y
+CONFIG_ANON_INODES=y
+CONFIG_EPOLL=y
+CONFIG_SIGNALFD=y
+CONFIG_TIMERFD=y
+CONFIG_EVENTFD=y
+CONFIG_SHMEM=y
+CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_SLUB_DEBUG=y
+# CONFIG_SLAB is not set
+CONFIG_SLUB=y
+# CONFIG_SLOB is not set
+CONFIG_PROFILING=y
+# CONFIG_MARKERS is not set
+CONFIG_OPROFILE=m
+CONFIG_HAVE_OPROFILE=y
+CONFIG_KPROBES=y
+CONFIG_HAVE_KPROBES=y
+# CONFIG_HAVE_KRETPROBES is not set
+CONFIG_PROC_PAGE_MONITOR=y
+CONFIG_SLABINFO=y
+CONFIG_RT_MUTEXES=y
+# CONFIG_TINY_SHMEM is not set
+CONFIG_BASE_SMALL=1
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_MODULE_FORCE_UNLOAD is not set
+# CONFIG_MODVERSIONS is not set
+# CONFIG_MODULE_SRCVERSION_ALL is not set
+# CONFIG_KMOD is not set
+CONFIG_BLOCK=y
+# CONFIG_LBD is not set
+# CONFIG_BLK_DEV_IO_TRACE is not set
+# CONFIG_LSF is not set
+# CONFIG_BLK_DEV_BSG is not set
+
+#
+# IO Schedulers
+#
+CONFIG_IOSCHED_NOOP=y
+# CONFIG_IOSCHED_AS is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+CONFIG_IOSCHED_CFQ=y
+# CONFIG_DEFAULT_AS is not set
+# CONFIG_DEFAULT_DEADLINE is not set
+CONFIG_DEFAULT_CFQ=y
+# CONFIG_DEFAULT_NOOP is not set
+CONFIG_DEFAULT_IOSCHED="cfq"
+CONFIG_CLASSIC_RCU=y
+
+#
+# System Type and features
+#
+CONFIG_TICK_ONESHOT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
+CONFIG_SUBARCH_AVR32B=y
+CONFIG_MMU=y
+CONFIG_PERFORMANCE_COUNTERS=y
+CONFIG_PLATFORM_AT32AP=y
+CONFIG_CPU_AT32AP700X=y
+CONFIG_CPU_AT32AP7000=y
+CONFIG_BOARD_ATSTK1000=y
+# CONFIG_BOARD_ATNGW100 is not set
+# CONFIG_BOARD_ATSTK1002 is not set
+# CONFIG_BOARD_ATSTK1003 is not set
+# CONFIG_BOARD_ATSTK1004 is not set
+CONFIG_BOARD_ATSTK1006=y
+# CONFIG_BOARD_ATSTK100X_CUSTOM is not set
+# CONFIG_BOARD_ATSTK100X_SPI1 is not set
+# CONFIG_BOARD_ATSTK1000_J2_LED is not set
+# CONFIG_BOARD_ATSTK1000_J2_LED8 is not set
+# CONFIG_BOARD_ATSTK1000_J2_RGB is not set
+CONFIG_BOARD_ATSTK1000_EXTDAC=y
+# CONFIG_BOARD_ATSTK100X_ENABLE_AC97 is not set
+# CONFIG_BOARD_ATSTK1000_CF_HACKS is not set
+# CONFIG_BOARD_ATSTK100X_ENABLE_PSIF is not set
+CONFIG_LOADER_U_BOOT=y
+
+#
+# Atmel AVR32 AP options
+#
+# CONFIG_AP700X_32_BIT_SMC is not set
+CONFIG_AP700X_16_BIT_SMC=y
+# CONFIG_AP700X_8_BIT_SMC is not set
+CONFIG_GPIO_DEV=y
+CONFIG_LOAD_ADDRESS=0x10000000
+CONFIG_ENTRY_ADDRESS=0x90000000
+CONFIG_PHYS_OFFSET=0x10000000
+CONFIG_PREEMPT_NONE=y
+# CONFIG_PREEMPT_VOLUNTARY is not set
+# CONFIG_PREEMPT is not set
+# CONFIG_HAVE_ARCH_BOOTMEM_NODE is not set
+# CONFIG_ARCH_HAVE_MEMORY_PRESENT is not set
+# CONFIG_NEED_NODE_MEMMAP_SIZE is not set
+CONFIG_ARCH_FLATMEM_ENABLE=y
+# CONFIG_ARCH_DISCONTIGMEM_ENABLE is not set
+# CONFIG_ARCH_SPARSEMEM_ENABLE is not set
+CONFIG_SELECT_MEMORY_MODEL=y
+CONFIG_FLATMEM_MANUAL=y
+# CONFIG_DISCONTIGMEM_MANUAL is not set
+# CONFIG_SPARSEMEM_MANUAL is not set
+CONFIG_FLATMEM=y
+CONFIG_FLAT_NODE_MEM_MAP=y
+# CONFIG_SPARSEMEM_STATIC is not set
+# CONFIG_SPARSEMEM_VMEMMAP_ENABLE is not set
+CONFIG_SPLIT_PTLOCK_CPUS=4
+# CONFIG_RESOURCES_64BIT is not set
+CONFIG_ZONE_DMA_FLAG=0
+CONFIG_VIRT_TO_BUS=y
+# CONFIG_OWNERSHIP_TRACE is not set
+CONFIG_NMI_DEBUGGING=y
+CONFIG_DW_DMAC=y
+# CONFIG_HZ_100 is not set
+CONFIG_HZ_250=y
+# CONFIG_HZ_300 is not set
+# CONFIG_HZ_1000 is not set
+CONFIG_HZ=250
+# CONFIG_SCHED_HRTICK is not set
+CONFIG_CMDLINE=""
+
+#
+# Power management options
+#
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_PM=y
+# CONFIG_PM_LEGACY is not set
+# CONFIG_PM_DEBUG is not set
+CONFIG_PM_SLEEP=y
+CONFIG_SUSPEND=y
+CONFIG_SUSPEND_FREEZER=y
+
+#
+# CPU Frequency scaling
+#
+CONFIG_CPU_FREQ=y
+CONFIG_CPU_FREQ_TABLE=y
+# CONFIG_CPU_FREQ_DEBUG is not set
+# CONFIG_CPU_FREQ_STAT is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
+# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
+CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
+# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
+CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
+# CONFIG_CPU_FREQ_GOV_POWERSAVE is not set
+CONFIG_CPU_FREQ_GOV_USERSPACE=y
+CONFIG_CPU_FREQ_GOV_ONDEMAND=y
+# CONFIG_CPU_FREQ_GOV_CONSERVATIVE is not set
+CONFIG_CPU_FREQ_AT32AP=y
+
+#
+# Bus options
+#
+# CONFIG_ARCH_SUPPORTS_MSI is not set
+# CONFIG_PCCARD is not set
+
+#
+# Executable file formats
+#
+CONFIG_BINFMT_ELF=y
+# CONFIG_BINFMT_MISC is not set
+
+#
+# Networking
+#
+CONFIG_NET=y
+
+#
+# Networking options
+#
+CONFIG_PACKET=y
+CONFIG_PACKET_MMAP=y
+CONFIG_UNIX=y
+CONFIG_XFRM=y
+CONFIG_XFRM_USER=m
+# CONFIG_XFRM_SUB_POLICY is not set
+# CONFIG_XFRM_MIGRATE is not set
+# CONFIG_XFRM_STATISTICS is not set
+CONFIG_NET_KEY=m
+# CONFIG_NET_KEY_MIGRATE is not set
+CONFIG_INET=y
+# CONFIG_IP_MULTICAST is not set
+# CONFIG_IP_ADVANCED_ROUTER is not set
+CONFIG_IP_FIB_HASH=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_DHCP=y
+# CONFIG_IP_PNP_BOOTP is not set
+# CONFIG_IP_PNP_RARP is not set
+CONFIG_NET_IPIP=m
+CONFIG_NET_IPGRE=m
+# CONFIG_ARPD is not set
+# CONFIG_SYN_COOKIES is not set
+CONFIG_INET_AH=m
+CONFIG_INET_ESP=m
+# CONFIG_INET_IPCOMP is not set
+# CONFIG_INET_XFRM_TUNNEL is not set
+CONFIG_INET_TUNNEL=m
+CONFIG_INET_XFRM_MODE_TRANSPORT=m
+CONFIG_INET_XFRM_MODE_TUNNEL=m
+CONFIG_INET_XFRM_MODE_BEET=m
+# CONFIG_INET_LRO is not set
+CONFIG_INET_DIAG=y
+CONFIG_INET_TCP_DIAG=y
+# CONFIG_TCP_CONG_ADVANCED is not set
+CONFIG_TCP_CONG_CUBIC=y
+CONFIG_DEFAULT_TCP_CONG="cubic"
+# CONFIG_TCP_MD5SIG is not set
+CONFIG_IPV6=m
+# CONFIG_IPV6_PRIVACY is not set
+# CONFIG_IPV6_ROUTER_PREF is not set
+# CONFIG_IPV6_OPTIMISTIC_DAD is not set
+CONFIG_INET6_AH=m
+CONFIG_INET6_ESP=m
+CONFIG_INET6_IPCOMP=m
+# CONFIG_IPV6_MIP6 is not set
+CONFIG_INET6_XFRM_TUNNEL=m
+CONFIG_INET6_TUNNEL=m
+CONFIG_INET6_XFRM_MODE_TRANSPORT=m
+CONFIG_INET6_XFRM_MODE_TUNNEL=m
+CONFIG_INET6_XFRM_MODE_BEET=m
+# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
+CONFIG_IPV6_SIT=m
+CONFIG_IPV6_TUNNEL=m
+# CONFIG_IPV6_MULTIPLE_TABLES is not set
+# CONFIG_NETWORK_SECMARK is not set
+# CONFIG_NETFILTER is not set
+# CONFIG_IP_DCCP is not set
+# CONFIG_IP_SCTP is not set
+# CONFIG_TIPC is not set
+# CONFIG_ATM is not set
+CONFIG_BRIDGE=m
+# CONFIG_VLAN_8021Q is not set
+# CONFIG_DECNET is not set
+CONFIG_LLC=m
+# CONFIG_LLC2 is not set
+# CONFIG_IPX is not set
+# CONFIG_ATALK is not set
+# CONFIG_X25 is not set
+# CONFIG_LAPB is not set
+# CONFIG_ECONET is not set
+# CONFIG_WAN_ROUTER is not set
+# CONFIG_NET_SCHED is not set
+
+#
+# Network testing
+#
+# CONFIG_NET_PKTGEN is not set
+# CONFIG_NET_TCPPROBE is not set
+# CONFIG_HAMRADIO is not set
+# CONFIG_CAN is not set
+# CONFIG_IRDA is not set
+# CONFIG_BT is not set
+# CONFIG_AF_RXRPC is not set
+
+#
+# Wireless
+#
+# CONFIG_CFG80211 is not set
+# CONFIG_WIRELESS_EXT is not set
+# CONFIG_MAC80211 is not set
+# CONFIG_IEEE80211 is not set
+# CONFIG_RFKILL is not set
+# CONFIG_NET_9P is not set
+
+#
+# Device Drivers
+#
+
+#
+# Generic Driver Options
+#
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_STANDALONE=y
+# CONFIG_PREVENT_FIRMWARE_BUILD is not set
+# CONFIG_FW_LOADER is not set
+# CONFIG_DEBUG_DRIVER is not set
+# CONFIG_DEBUG_DEVRES is not set
+# CONFIG_SYS_HYPERVISOR is not set
+# CONFIG_CONNECTOR is not set
+CONFIG_MTD=y
+# CONFIG_MTD_DEBUG is not set
+# CONFIG_MTD_CONCAT is not set
+CONFIG_MTD_PARTITIONS=y
+# CONFIG_MTD_REDBOOT_PARTS is not set
+CONFIG_MTD_CMDLINE_PARTS=y
+
+#
+# User Modules And Translation Layers
+#
+CONFIG_MTD_CHAR=y
+CONFIG_MTD_BLKDEVS=y
+CONFIG_MTD_BLOCK=y
+# CONFIG_FTL is not set
+# CONFIG_NFTL is not set
+# CONFIG_INFTL is not set
+# CONFIG_RFD_FTL is not set
+# CONFIG_SSFDC is not set
+# CONFIG_MTD_OOPS is not set
+
+#
+# RAM/ROM/Flash chip drivers
+#
+CONFIG_MTD_CFI=y
+# CONFIG_MTD_JEDECPROBE is not set
+CONFIG_MTD_GEN_PROBE=y
+# CONFIG_MTD_CFI_ADV_OPTIONS is not set
+CONFIG_MTD_MAP_BANK_WIDTH_1=y
+CONFIG_MTD_MAP_BANK_WIDTH_2=y
+CONFIG_MTD_MAP_BANK_WIDTH_4=y
+# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
+# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
+# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
+CONFIG_MTD_CFI_I1=y
+CONFIG_MTD_CFI_I2=y
+# CONFIG_MTD_CFI_I4 is not set
+# CONFIG_MTD_CFI_I8 is not set
+# CONFIG_MTD_CFI_INTELEXT is not set
+CONFIG_MTD_CFI_AMDSTD=y
+# CONFIG_MTD_CFI_STAA is not set
+CONFIG_MTD_CFI_UTIL=y
+# CONFIG_MTD_RAM is not set
+# CONFIG_MTD_ROM is not set
+# CONFIG_MTD_ABSENT is not set
+
+#
+# Mapping drivers for chip access
+#
+# CONFIG_MTD_COMPLEX_MAPPINGS is not set
+CONFIG_MTD_PHYSMAP=y
+CONFIG_MTD_PHYSMAP_START=0x8000000
+CONFIG_MTD_PHYSMAP_LEN=0x0
+CONFIG_MTD_PHYSMAP_BANKWIDTH=2
+# CONFIG_MTD_PLATRAM is not set
+
+#
+# Self-contained MTD device drivers
+#
+CONFIG_MTD_DATAFLASH=m
+CONFIG_MTD_M25P80=m
+# CONFIG_MTD_SLRAM is not set
+# CONFIG_MTD_PHRAM is not set
+# CONFIG_MTD_MTDRAM is not set
+# CONFIG_MTD_BLOCK2MTD is not set
+
+#
+# Disk-On-Chip Device Drivers
+#
+# CONFIG_MTD_DOC2000 is not set
+# CONFIG_MTD_DOC2001 is not set
+# CONFIG_MTD_DOC2001PLUS is not set
+CONFIG_MTD_NAND=y
+# CONFIG_MTD_NAND_VERIFY_WRITE is not set
+# CONFIG_MTD_NAND_ECC_SMC is not set
+# CONFIG_MTD_NAND_MUSEUM_IDS is not set
+CONFIG_MTD_NAND_IDS=y
+# CONFIG_MTD_NAND_DISKONCHIP is not set
+CONFIG_MTD_NAND_ATMEL=y
+CONFIG_MTD_NAND_ATMEL_ECC_HW=y
+# CONFIG_MTD_NAND_ATMEL_ECC_SOFT is not set
+# CONFIG_MTD_NAND_ATMEL_ECC_NONE is not set
+# CONFIG_MTD_NAND_NANDSIM is not set
+# CONFIG_MTD_NAND_PLATFORM is not set
+# CONFIG_MTD_ONENAND is not set
+
+#
+# UBI - Unsorted block images
+#
+CONFIG_MTD_UBI=m
+CONFIG_MTD_UBI_WL_THRESHOLD=4096
+CONFIG_MTD_UBI_BEB_RESERVE=1
+CONFIG_MTD_UBI_GLUEBI=y
+
+#
+# UBI debugging options
+#
+# CONFIG_MTD_UBI_DEBUG is not set
+# CONFIG_PARPORT is not set
+CONFIG_BLK_DEV=y
+# CONFIG_BLK_DEV_COW_COMMON is not set
+CONFIG_BLK_DEV_LOOP=m
+# CONFIG_BLK_DEV_CRYPTOLOOP is not set
+CONFIG_BLK_DEV_NBD=m
+CONFIG_BLK_DEV_RAM=m
+CONFIG_BLK_DEV_RAM_COUNT=16
+CONFIG_BLK_DEV_RAM_SIZE=4096
+# CONFIG_BLK_DEV_XIP is not set
+# CONFIG_CDROM_PKTCDVD is not set
+# CONFIG_ATA_OVER_ETH is not set
+CONFIG_MISC_DEVICES=y
+CONFIG_ATMEL_PWM=m
+CONFIG_ATMEL_TCLIB=y
+CONFIG_ATMEL_TCB_CLKSRC=y
+CONFIG_ATMEL_TCB_CLKSRC_BLOCK=0
+# CONFIG_EEPROM_93CX6 is not set
+CONFIG_ATMEL_SSC=m
+# CONFIG_ENCLOSURE_SERVICES is not set
+# CONFIG_HAVE_IDE is not set
+
+#
+# SCSI device support
+#
+# CONFIG_RAID_ATTRS is not set
+CONFIG_SCSI=m
+CONFIG_SCSI_DMA=y
+# CONFIG_SCSI_TGT is not set
+# CONFIG_SCSI_NETLINK is not set
+# CONFIG_SCSI_PROC_FS is not set
+
+#
+# SCSI support type (disk, tape, CD-ROM)
+#
+CONFIG_BLK_DEV_SD=m
+# CONFIG_CHR_DEV_ST is not set
+# CONFIG_CHR_DEV_OSST is not set
+CONFIG_BLK_DEV_SR=m
+# CONFIG_BLK_DEV_SR_VENDOR is not set
+# CONFIG_CHR_DEV_SG is not set
+# CONFIG_CHR_DEV_SCH is not set
+
+#
+# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
+#
+# CONFIG_SCSI_MULTI_LUN is not set
+# CONFIG_SCSI_CONSTANTS is not set
+# CONFIG_SCSI_LOGGING is not set
+# CONFIG_SCSI_SCAN_ASYNC is not set
+CONFIG_SCSI_WAIT_SCAN=m
+
+#
+# SCSI Transports
+#
+# CONFIG_SCSI_SPI_ATTRS is not set
+# CONFIG_SCSI_FC_ATTRS is not set
+# CONFIG_SCSI_ISCSI_ATTRS is not set
+# CONFIG_SCSI_SAS_LIBSAS is not set
+# CONFIG_SCSI_SRP_ATTRS is not set
+# CONFIG_SCSI_LOWLEVEL is not set
+CONFIG_ATA=m
+# CONFIG_ATA_NONSTANDARD is not set
+# CONFIG_SATA_MV is not set
+CONFIG_PATA_AT32=m
+# CONFIG_PATA_PLATFORM is not set
+# CONFIG_MD is not set
+CONFIG_NETDEVICES=y
+# CONFIG_NETDEVICES_MULTIQUEUE is not set
+# CONFIG_DUMMY is not set
+# CONFIG_BONDING is not set
+# CONFIG_MACVLAN is not set
+# CONFIG_EQUALIZER is not set
+CONFIG_TUN=m
+# CONFIG_VETH is not set
+CONFIG_PHYLIB=y
+
+#
+# MII PHY device drivers
+#
+# CONFIG_MARVELL_PHY is not set
+# CONFIG_DAVICOM_PHY is not set
+# CONFIG_QSEMI_PHY is not set
+# CONFIG_LXT_PHY is not set
+# CONFIG_CICADA_PHY is not set
+# CONFIG_VITESSE_PHY is not set
+# CONFIG_SMSC_PHY is not set
+# CONFIG_BROADCOM_PHY is not set
+# CONFIG_ICPLUS_PHY is not set
+# CONFIG_REALTEK_PHY is not set
+# CONFIG_FIXED_PHY is not set
+# CONFIG_MDIO_BITBANG is not set
+CONFIG_NET_ETHERNET=y
+# CONFIG_MII is not set
+CONFIG_MACB=y
+# CONFIG_ENC28J60 is not set
+# CONFIG_IBM_NEW_EMAC_ZMII is not set
+# CONFIG_IBM_NEW_EMAC_RGMII is not set
+# CONFIG_IBM_NEW_EMAC_TAH is not set
+# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
+# CONFIG_B44 is not set
+# CONFIG_NETDEV_1000 is not set
+# CONFIG_NETDEV_10000 is not set
+
+#
+# Wireless LAN
+#
+# CONFIG_WLAN_PRE80211 is not set
+# CONFIG_WLAN_80211 is not set
+# CONFIG_WAN is not set
+CONFIG_PPP=m
+# CONFIG_PPP_MULTILINK is not set
+# CONFIG_PPP_FILTER is not set
+CONFIG_PPP_ASYNC=m
+# CONFIG_PPP_SYNC_TTY is not set
+CONFIG_PPP_DEFLATE=m
+CONFIG_PPP_BSDCOMP=m
+# CONFIG_PPP_MPPE is not set
+# CONFIG_PPPOE is not set
+# CONFIG_PPPOL2TP is not set
+# CONFIG_SLIP is not set
+CONFIG_SLHC=m
+# CONFIG_NETCONSOLE is not set
+# CONFIG_NETPOLL is not set
+# CONFIG_NET_POLL_CONTROLLER is not set
+# CONFIG_ISDN is not set
+# CONFIG_PHONE is not set
+
+#
+# Input device support
+#
+CONFIG_INPUT=m
+# CONFIG_INPUT_FF_MEMLESS is not set
+CONFIG_INPUT_POLLDEV=m
+
+#
+# Userland interfaces
+#
+CONFIG_INPUT_MOUSEDEV=m
+CONFIG_INPUT_MOUSEDEV_PSAUX=y
+CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
+CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
+# CONFIG_INPUT_JOYDEV is not set
+CONFIG_INPUT_EVDEV=m
+# CONFIG_INPUT_EVBUG is not set
+
+#
+# Input Device Drivers
+#
+CONFIG_INPUT_KEYBOARD=y
+# CONFIG_KEYBOARD_ATKBD is not set
+# CONFIG_KEYBOARD_SUNKBD is not set
+# CONFIG_KEYBOARD_LKKBD is not set
+# CONFIG_KEYBOARD_XTKBD is not set
+# CONFIG_KEYBOARD_NEWTON is not set
+# CONFIG_KEYBOARD_STOWAWAY is not set
+CONFIG_KEYBOARD_GPIO=m
+CONFIG_INPUT_MOUSE=y
+# CONFIG_MOUSE_PS2 is not set
+# CONFIG_MOUSE_SERIAL is not set
+# CONFIG_MOUSE_VSXXXAA is not set
+CONFIG_MOUSE_GPIO=m
+# CONFIG_INPUT_JOYSTICK is not set
+# CONFIG_INPUT_TABLET is not set
+# CONFIG_INPUT_TOUCHSCREEN is not set
+# CONFIG_INPUT_MISC is not set
+
+#
+# Hardware I/O ports
+#
+# CONFIG_SERIO is not set
+# CONFIG_GAMEPORT is not set
+
+#
+# Character devices
+#
+# CONFIG_VT is not set
+# CONFIG_SERIAL_NONSTANDARD is not set
+
+#
+# Serial drivers
+#
+# CONFIG_SERIAL_8250 is not set
+
+#
+# Non-8250 serial port support
+#
+CONFIG_SERIAL_ATMEL=y
+CONFIG_SERIAL_ATMEL_CONSOLE=y
+CONFIG_SERIAL_ATMEL_PDC=y
+# CONFIG_SERIAL_ATMEL_TTYAT is not set
+CONFIG_SERIAL_CORE=y
+CONFIG_SERIAL_CORE_CONSOLE=y
+CONFIG_UNIX98_PTYS=y
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_IPMI_HANDLER is not set
+# CONFIG_HW_RANDOM is not set
+# CONFIG_R3964 is not set
+# CONFIG_RAW_DRIVER is not set
+# CONFIG_TCG_TPM is not set
+CONFIG_I2C=m
+CONFIG_I2C_BOARDINFO=y
+CONFIG_I2C_CHARDEV=m
+
+#
+# I2C Algorithms
+#
+CONFIG_I2C_ALGOBIT=m
+# CONFIG_I2C_ALGOPCF is not set
+# CONFIG_I2C_ALGOPCA is not set
+
+#
+# I2C Hardware Bus support
+#
+CONFIG_I2C_ATMELTWI=m
+CONFIG_I2C_GPIO=m
+# CONFIG_I2C_OCORES is not set
+# CONFIG_I2C_PARPORT_LIGHT is not set
+# CONFIG_I2C_SIMTEC is not set
+# CONFIG_I2C_TAOS_EVM is not set
+# CONFIG_I2C_STUB is not set
+
+#
+# Miscellaneous I2C Chip support
+#
+# CONFIG_DS1682 is not set
+# CONFIG_SENSORS_EEPROM is not set
+# CONFIG_SENSORS_PCF8574 is not set
+# CONFIG_PCF8575 is not set
+# CONFIG_SENSORS_PCF8591 is not set
+# CONFIG_TPS65010 is not set
+# CONFIG_SENSORS_MAX6875 is not set
+# CONFIG_SENSORS_TSL2550 is not set
+# CONFIG_I2C_DEBUG_CORE is not set
+# CONFIG_I2C_DEBUG_ALGO is not set
+# CONFIG_I2C_DEBUG_BUS is not set
+# CONFIG_I2C_DEBUG_CHIP is not set
+
+#
+# SPI support
+#
+CONFIG_SPI=y
+# CONFIG_SPI_DEBUG is not set
+CONFIG_SPI_MASTER=y
+
+#
+# SPI Master Controller Drivers
+#
+CONFIG_SPI_ATMEL=y
+# CONFIG_SPI_BITBANG is not set
+
+#
+# SPI Protocol Masters
+#
+# CONFIG_SPI_AT25 is not set
+CONFIG_SPI_SPIDEV=m
+# CONFIG_SPI_TLE62X0 is not set
+CONFIG_HAVE_GPIO_LIB=y
+
+#
+# GPIO Support
+#
+# CONFIG_DEBUG_GPIO is not set
+
+#
+# I2C GPIO expanders:
+#
+# CONFIG_GPIO_PCA953X is not set
+# CONFIG_GPIO_PCF857X is not set
+
+#
+# SPI GPIO expanders:
+#
+# CONFIG_GPIO_MCP23S08 is not set
+# CONFIG_W1 is not set
+# CONFIG_POWER_SUPPLY is not set
+# CONFIG_HWMON is not set
+# CONFIG_THERMAL is not set
+CONFIG_WATCHDOG=y
+# CONFIG_WATCHDOG_NOWAYOUT is not set
+
+#
+# Watchdog Device Drivers
+#
+# CONFIG_SOFT_WATCHDOG is not set
+CONFIG_AT32AP700X_WDT=y
+
+#
+# Sonics Silicon Backplane
+#
+CONFIG_SSB_POSSIBLE=y
+# CONFIG_SSB is not set
+
+#
+# Multifunction device drivers
+#
+# CONFIG_MFD_SM501 is not set
+
+#
+# Multimedia devices
+#
+# CONFIG_VIDEO_DEV is not set
+# CONFIG_DVB_CORE is not set
+# CONFIG_DAB is not set
+
+#
+# Graphics support
+#
+# CONFIG_VGASTATE is not set
+# CONFIG_VIDEO_OUTPUT_CONTROL is not set
+CONFIG_FB=y
+# CONFIG_FIRMWARE_EDID is not set
+# CONFIG_FB_DDC is not set
+CONFIG_FB_CFB_FILLRECT=y
+CONFIG_FB_CFB_COPYAREA=y
+CONFIG_FB_CFB_IMAGEBLIT=y
+# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
+# CONFIG_FB_SYS_FILLRECT is not set
+# CONFIG_FB_SYS_COPYAREA is not set
+# CONFIG_FB_SYS_IMAGEBLIT is not set
+# CONFIG_FB_SYS_FOPS is not set
+CONFIG_FB_DEFERRED_IO=y
+# CONFIG_FB_SVGALIB is not set
+# CONFIG_FB_MACMODES is not set
+# CONFIG_FB_BACKLIGHT is not set
+# CONFIG_FB_MODE_HELPERS is not set
+# CONFIG_FB_TILEBLITTING is not set
+
+#
+# Frame buffer hardware drivers
+#
+# CONFIG_FB_S1D13XXX is not set
+CONFIG_FB_ATMEL=y
+# CONFIG_FB_VIRTUAL is not set
+CONFIG_BACKLIGHT_LCD_SUPPORT=y
+CONFIG_LCD_CLASS_DEVICE=y
+CONFIG_LCD_LTV350QV=y
+# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
+
+#
+# Display device support
+#
+# CONFIG_DISPLAY_SUPPORT is not set
+# CONFIG_LOGO is not set
+
+#
+# Sound
+#
+CONFIG_SOUND=m
+
+#
+# Advanced Linux Sound Architecture
+#
+CONFIG_SND=m
+CONFIG_SND_TIMER=m
+CONFIG_SND_PCM=m
+# CONFIG_SND_SEQUENCER is not set
+CONFIG_SND_OSSEMUL=y
+CONFIG_SND_MIXER_OSS=m
+CONFIG_SND_PCM_OSS=m
+CONFIG_SND_PCM_OSS_PLUGINS=y
+# CONFIG_SND_DYNAMIC_MINORS is not set
+# CONFIG_SND_SUPPORT_OLD_API is not set
+# CONFIG_SND_VERBOSE_PROCFS is not set
+# CONFIG_SND_VERBOSE_PRINTK is not set
+# CONFIG_SND_DEBUG is not set
+
+#
+# Generic devices
+#
+CONFIG_SND_AC97_CODEC=m
+# CONFIG_SND_DUMMY is not set
+# CONFIG_SND_MTPAV is not set
+# CONFIG_SND_SERIAL_U16550 is not set
+# CONFIG_SND_MPU401 is not set
+
+#
+# AVR32 devices
+#
+CONFIG_SND_ATMEL_AC97=m
+
+#
+# SPI devices
+#
+CONFIG_SND_AT73C213=m
+CONFIG_SND_AT73C213_TARGET_BITRATE=48000
+
+#
+# System on Chip audio support
+#
+# CONFIG_SND_SOC is not set
+
+#
+# SoC Audio support for SuperH
+#
+
+#
+# ALSA SoC audio for Freescale SOCs
+#
+
+#
+# Open Sound System
+#
+# CONFIG_SOUND_PRIME is not set
+CONFIG_AC97_BUS=m
+# CONFIG_HID_SUPPORT is not set
+CONFIG_USB_SUPPORT=y
+# CONFIG_USB_ARCH_HAS_HCD is not set
+# CONFIG_USB_ARCH_HAS_OHCI is not set
+# CONFIG_USB_ARCH_HAS_EHCI is not set
+
+#
+# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
+#
+CONFIG_USB_GADGET=y
+# CONFIG_USB_GADGET_DEBUG is not set
+# CONFIG_USB_GADGET_DEBUG_FILES is not set
+# CONFIG_USB_GADGET_DEBUG_FS is not set
+CONFIG_USB_GADGET_SELECTED=y
+# CONFIG_USB_GADGET_AMD5536UDC is not set
+CONFIG_USB_GADGET_ATMEL_USBA=y
+CONFIG_USB_ATMEL_USBA=y
+# CONFIG_USB_GADGET_FSL_USB2 is not set
+# CONFIG_USB_GADGET_NET2280 is not set
+# CONFIG_USB_GADGET_PXA2XX is not set
+# CONFIG_USB_GADGET_M66592 is not set
+# CONFIG_USB_GADGET_GOKU is not set
+# CONFIG_USB_GADGET_LH7A40X is not set
+# CONFIG_USB_GADGET_OMAP is not set
+# CONFIG_USB_GADGET_S3C2410 is not set
+# CONFIG_USB_GADGET_AT91 is not set
+# CONFIG_USB_GADGET_DUMMY_HCD is not set
+CONFIG_USB_GADGET_DUALSPEED=y
+CONFIG_USB_ZERO=m
+CONFIG_USB_ETH=m
+CONFIG_USB_ETH_RNDIS=y
+CONFIG_USB_GADGETFS=m
+CONFIG_USB_FILE_STORAGE=m
+# CONFIG_USB_FILE_STORAGE_TEST is not set
+CONFIG_USB_G_SERIAL=m
+# CONFIG_USB_MIDI_GADGET is not set
+# CONFIG_USB_G_PRINTER is not set
+CONFIG_MMC=y
+# CONFIG_MMC_DEBUG is not set
+# CONFIG_MMC_UNSAFE_RESUME is not set
+
+#
+# MMC/SD Card Drivers
+#
+CONFIG_MMC_BLOCK=y
+CONFIG_MMC_BLOCK_BOUNCE=y
+# CONFIG_SDIO_UART is not set
+
+#
+# MMC/SD Host Controller Drivers
+#
+CONFIG_MMC_ATMELMCI=y
+CONFIG_MMC_SPI=m
+# CONFIG_MEMSTICK is not set
+CONFIG_NEW_LEDS=y
+CONFIG_LEDS_CLASS=m
+
+#
+# LED drivers
+#
+CONFIG_LEDS_ATMEL_PWM=m
+CONFIG_LEDS_GPIO=m
+
+#
+# LED Triggers
+#
+CONFIG_LEDS_TRIGGERS=y
+CONFIG_LEDS_TRIGGER_TIMER=m
+CONFIG_LEDS_TRIGGER_HEARTBEAT=m
+CONFIG_RTC_LIB=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_HCTOSYS=y
+CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
+# CONFIG_RTC_DEBUG is not set
+
+#
+# RTC interfaces
+#
+CONFIG_RTC_INTF_SYSFS=y
+CONFIG_RTC_INTF_PROC=y
+CONFIG_RTC_INTF_DEV=y
+# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
+# CONFIG_RTC_DRV_TEST is not set
+
+#
+# I2C RTC drivers
+#
+# CONFIG_RTC_DRV_DS1307 is not set
+# CONFIG_RTC_DRV_DS1374 is not set
+# CONFIG_RTC_DRV_DS1672 is not set
+# CONFIG_RTC_DRV_MAX6900 is not set
+# CONFIG_RTC_DRV_RS5C372 is not set
+# CONFIG_RTC_DRV_ISL1208 is not set
+# CONFIG_RTC_DRV_X1205 is not set
+# CONFIG_RTC_DRV_PCF8563 is not set
+# CONFIG_RTC_DRV_PCF8583 is not set
+# CONFIG_RTC_DRV_M41T80 is not set
+# CONFIG_RTC_DRV_S35390A is not set
+
+#
+# SPI RTC drivers
+#
+# CONFIG_RTC_DRV_MAX6902 is not set
+# CONFIG_RTC_DRV_R9701 is not set
+# CONFIG_RTC_DRV_RS5C348 is not set
+
+#
+# Platform RTC drivers
+#
+# CONFIG_RTC_DRV_DS1511 is not set
+# CONFIG_RTC_DRV_DS1553 is not set
+# CONFIG_RTC_DRV_DS1742 is not set
+# CONFIG_RTC_DRV_STK17TA8 is not set
+# CONFIG_RTC_DRV_M48T86 is not set
+# CONFIG_RTC_DRV_M48T59 is not set
+# CONFIG_RTC_DRV_V3020 is not set
+
+#
+# on-CPU RTC drivers
+#
+CONFIG_RTC_DRV_AT32AP700X=y
+
+#
+# Userspace I/O
+#
+# CONFIG_UIO is not set
+
+#
+# File systems
+#
+CONFIG_EXT2_FS=y
+# CONFIG_EXT2_FS_XATTR is not set
+# CONFIG_EXT2_FS_XIP is not set
+CONFIG_EXT3_FS=y
+# CONFIG_EXT3_FS_XATTR is not set
+# CONFIG_EXT4DEV_FS is not set
+CONFIG_JBD=y
+# CONFIG_JBD_DEBUG is not set
+# CONFIG_REISERFS_FS is not set
+# CONFIG_JFS_FS is not set
+# CONFIG_FS_POSIX_ACL is not set
+# CONFIG_XFS_FS is not set
+# CONFIG_GFS2_FS is not set
+# CONFIG_OCFS2_FS is not set
+# CONFIG_DNOTIFY is not set
+CONFIG_INOTIFY=y
+CONFIG_INOTIFY_USER=y
+# CONFIG_QUOTA is not set
+# CONFIG_AUTOFS_FS is not set
+# CONFIG_AUTOFS4_FS is not set
+CONFIG_FUSE_FS=m
+
+#
+# CD-ROM/DVD Filesystems
+#
+# CONFIG_ISO9660_FS is not set
+# CONFIG_UDF_FS is not set
+
+#
+# DOS/FAT/NT Filesystems
+#
+CONFIG_FAT_FS=m
+CONFIG_MSDOS_FS=m
+CONFIG_VFAT_FS=m
+CONFIG_FAT_DEFAULT_CODEPAGE=437
+CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
+# CONFIG_NTFS_FS is not set
+
+#
+# Pseudo filesystems
+#
+CONFIG_PROC_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_PROC_SYSCTL=y
+CONFIG_SYSFS=y
+CONFIG_TMPFS=y
+# CONFIG_TMPFS_POSIX_ACL is not set
+# CONFIG_HUGETLB_PAGE is not set
+CONFIG_CONFIGFS_FS=y
+
+#
+# Miscellaneous filesystems
+#
+# CONFIG_ADFS_FS is not set
+# CONFIG_AFFS_FS is not set
+# CONFIG_HFS_FS is not set
+# CONFIG_HFSPLUS_FS is not set
+# CONFIG_BEFS_FS is not set
+# CONFIG_BFS_FS is not set
+# CONFIG_EFS_FS is not set
+CONFIG_JFFS2_FS=y
+CONFIG_JFFS2_FS_DEBUG=0
+# CONFIG_JFFS2_FS_WRITEBUFFER is not set
+# CONFIG_JFFS2_SUMMARY is not set
+# CONFIG_JFFS2_FS_XATTR is not set
+# CONFIG_JFFS2_COMPRESSION_OPTIONS is not set
+CONFIG_JFFS2_ZLIB=y
+# CONFIG_JFFS2_LZO is not set
+CONFIG_JFFS2_RTIME=y
+# CONFIG_JFFS2_RUBIN is not set
+# CONFIG_CRAMFS is not set
+# CONFIG_VXFS_FS is not set
+CONFIG_MINIX_FS=m
+# CONFIG_HPFS_FS is not set
+# CONFIG_QNX4FS_FS is not set
+# CONFIG_ROMFS_FS is not set
+# CONFIG_SYSV_FS is not set
+# CONFIG_UFS_FS is not set
+CONFIG_NETWORK_FILESYSTEMS=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V3=y
+# CONFIG_NFS_V3_ACL is not set
+# CONFIG_NFS_V4 is not set
+# CONFIG_NFS_DIRECTIO is not set
+# CONFIG_NFSD is not set
+CONFIG_ROOT_NFS=y
+CONFIG_LOCKD=y
+CONFIG_LOCKD_V4=y
+CONFIG_NFS_COMMON=y
+CONFIG_SUNRPC=y
+# CONFIG_SUNRPC_BIND34 is not set
+# CONFIG_RPCSEC_GSS_KRB5 is not set
+# CONFIG_RPCSEC_GSS_SPKM3 is not set
+# CONFIG_SMB_FS is not set
+# CONFIG_CIFS is not set
+# CONFIG_NCP_FS is not set
+# CONFIG_CODA_FS is not set
+# CONFIG_AFS_FS is not set
+
+#
+# Partition Types
+#
+# CONFIG_PARTITION_ADVANCED is not set
+CONFIG_MSDOS_PARTITION=y
+CONFIG_NLS=m
+CONFIG_NLS_DEFAULT="iso8859-1"
+CONFIG_NLS_CODEPAGE_437=m
+# CONFIG_NLS_CODEPAGE_737 is not set
+# CONFIG_NLS_CODEPAGE_775 is not set
+# CONFIG_NLS_CODEPAGE_850 is not set
+# CONFIG_NLS_CODEPAGE_852 is not set
+# CONFIG_NLS_CODEPAGE_855 is not set
+# CONFIG_NLS_CODEPAGE_857 is not set
+# CONFIG_NLS_CODEPAGE_860 is not set
+# CONFIG_NLS_CODEPAGE_861 is not set
+# CONFIG_NLS_CODEPAGE_862 is not set
+# CONFIG_NLS_CODEPAGE_863 is not set
+# CONFIG_NLS_CODEPAGE_864 is not set
+# CONFIG_NLS_CODEPAGE_865 is not set
+# CONFIG_NLS_CODEPAGE_866 is not set
+# CONFIG_NLS_CODEPAGE_869 is not set
+# CONFIG_NLS_CODEPAGE_936 is not set
+# CONFIG_NLS_CODEPAGE_950 is not set
+# CONFIG_NLS_CODEPAGE_932 is not set
+# CONFIG_NLS_CODEPAGE_949 is not set
+# CONFIG_NLS_CODEPAGE_874 is not set
+# CONFIG_NLS_ISO8859_8 is not set
+# CONFIG_NLS_CODEPAGE_1250 is not set
+# CONFIG_NLS_CODEPAGE_1251 is not set
+# CONFIG_NLS_ASCII is not set
+CONFIG_NLS_ISO8859_1=m
+# CONFIG_NLS_ISO8859_2 is not set
+# CONFIG_NLS_ISO8859_3 is not set
+# CONFIG_NLS_ISO8859_4 is not set
+# CONFIG_NLS_ISO8859_5 is not set
+# CONFIG_NLS_ISO8859_6 is not set
+# CONFIG_NLS_ISO8859_7 is not set
+# CONFIG_NLS_ISO8859_9 is not set
+# CONFIG_NLS_ISO8859_13 is not set
+# CONFIG_NLS_ISO8859_14 is not set
+# CONFIG_NLS_ISO8859_15 is not set
+# CONFIG_NLS_KOI8_R is not set
+# CONFIG_NLS_KOI8_U is not set
+CONFIG_NLS_UTF8=m
+# CONFIG_DLM is not set
+
+#
+# Kernel hacking
+#
+# CONFIG_PRINTK_TIME is not set
+CONFIG_ENABLE_WARN_DEPRECATED=y
+CONFIG_ENABLE_MUST_CHECK=y
+CONFIG_MAGIC_SYSRQ=y
+# CONFIG_UNUSED_SYMBOLS is not set
+CONFIG_DEBUG_FS=y
+# CONFIG_HEADERS_CHECK is not set
+CONFIG_DEBUG_KERNEL=y
+# CONFIG_DEBUG_SHIRQ is not set
+CONFIG_DETECT_SOFTLOCKUP=y
+CONFIG_SCHED_DEBUG=y
+# CONFIG_SCHEDSTATS is not set
+# CONFIG_TIMER_STATS is not set
+# CONFIG_SLUB_DEBUG_ON is not set
+# CONFIG_SLUB_STATS is not set
+# CONFIG_DEBUG_RT_MUTEXES is not set
+# CONFIG_RT_MUTEX_TESTER is not set
+# CONFIG_DEBUG_SPINLOCK is not set
+# CONFIG_DEBUG_MUTEXES is not set
+# CONFIG_DEBUG_LOCK_ALLOC is not set
+# CONFIG_PROVE_LOCKING is not set
+# CONFIG_LOCK_STAT is not set
+# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
+# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
+# CONFIG_DEBUG_KOBJECT is not set
+CONFIG_DEBUG_BUGVERBOSE=y
+# CONFIG_DEBUG_INFO is not set
+# CONFIG_DEBUG_VM is not set
+# CONFIG_DEBUG_LIST is not set
+# CONFIG_DEBUG_SG is not set
+CONFIG_FRAME_POINTER=y
+# CONFIG_BOOT_PRINTK_DELAY is not set
+# CONFIG_RCU_TORTURE_TEST is not set
+# CONFIG_KPROBES_SANITY_TEST is not set
+# CONFIG_BACKTRACE_SELF_TEST is not set
+# CONFIG_LKDTM is not set
+# CONFIG_FAULT_INJECTION is not set
+# CONFIG_SAMPLES is not set
+
+#
+# Security options
+#
+# CONFIG_KEYS is not set
+# CONFIG_SECURITY is not set
+# CONFIG_SECURITY_FILE_CAPABILITIES is not set
+CONFIG_CRYPTO=y
+CONFIG_CRYPTO_ALGAPI=m
+CONFIG_CRYPTO_AEAD=m
+CONFIG_CRYPTO_BLKCIPHER=m
+# CONFIG_CRYPTO_SEQIV is not set
+CONFIG_CRYPTO_HASH=m
+CONFIG_CRYPTO_MANAGER=m
+CONFIG_CRYPTO_HMAC=m
+# CONFIG_CRYPTO_XCBC is not set
+# CONFIG_CRYPTO_NULL is not set
+# CONFIG_CRYPTO_MD4 is not set
+CONFIG_CRYPTO_MD5=m
+CONFIG_CRYPTO_SHA1=m
+# CONFIG_CRYPTO_SHA256 is not set
+# CONFIG_CRYPTO_SHA512 is not set
+# CONFIG_CRYPTO_WP512 is not set
+# CONFIG_CRYPTO_TGR192 is not set
+# CONFIG_CRYPTO_GF128MUL is not set
+# CONFIG_CRYPTO_ECB is not set
+CONFIG_CRYPTO_CBC=m
+# CONFIG_CRYPTO_PCBC is not set
+# CONFIG_CRYPTO_LRW is not set
+# CONFIG_CRYPTO_XTS is not set
+# CONFIG_CRYPTO_CTR is not set
+# CONFIG_CRYPTO_GCM is not set
+# CONFIG_CRYPTO_CCM is not set
+# CONFIG_CRYPTO_CRYPTD is not set
+CONFIG_CRYPTO_DES=m
+# CONFIG_CRYPTO_FCRYPT is not set
+# CONFIG_CRYPTO_BLOWFISH is not set
+# CONFIG_CRYPTO_TWOFISH is not set
+# CONFIG_CRYPTO_SERPENT is not set
+# CONFIG_CRYPTO_AES is not set
+# CONFIG_CRYPTO_CAST5 is not set
+# CONFIG_CRYPTO_CAST6 is not set
+# CONFIG_CRYPTO_TEA is not set
+# CONFIG_CRYPTO_ARC4 is not set
+# CONFIG_CRYPTO_KHAZAD is not set
+# CONFIG_CRYPTO_ANUBIS is not set
+# CONFIG_CRYPTO_SEED is not set
+# CONFIG_CRYPTO_SALSA20 is not set
+CONFIG_CRYPTO_DEFLATE=m
+# CONFIG_CRYPTO_MICHAEL_MIC is not set
+# CONFIG_CRYPTO_CRC32C is not set
+# CONFIG_CRYPTO_CAMELLIA is not set
+# CONFIG_CRYPTO_TEST is not set
+CONFIG_CRYPTO_AUTHENC=m
+# CONFIG_CRYPTO_LZO is not set
+# CONFIG_CRYPTO_HW is not set
+
+#
+# Library routines
+#
+CONFIG_BITREVERSE=y
+CONFIG_CRC_CCITT=m
+# CONFIG_CRC16 is not set
+CONFIG_CRC_ITU_T=m
+CONFIG_CRC32=y
+CONFIG_CRC7=m
+# CONFIG_LIBCRC32C is not set
+CONFIG_ZLIB_INFLATE=y
+CONFIG_ZLIB_DEFLATE=y
+CONFIG_GENERIC_ALLOCATOR=y
+CONFIG_PLIST=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT=y
+CONFIG_HAS_DMA=y
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/drivers/dw-dmac.c avr32-2.6/arch/avr32/drivers/dw-dmac.c
--- linux-2.6.25.6/arch/avr32/drivers/dw-dmac.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/drivers/dw-dmac.c 2008-06-12 15:09:38.719815350 +0200
@@ -0,0 +1,761 @@
+/*
+ * Driver for the Synopsys DesignWare DMA Controller
+ *
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmapool.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <asm/dma-controller.h>
+#include <asm/io.h>
+
+#include "dw-dmac.h"
+
+#define DMAC_NR_CHANNELS 3
+#define DMAC_MAX_BLOCKSIZE 4095
+
+enum {
+ CH_STATE_FREE = 0,
+ CH_STATE_ALLOCATED,
+ CH_STATE_BUSY,
+};
+
+struct dw_dma_lli {
+ dma_addr_t sar;
+ dma_addr_t dar;
+ dma_addr_t llp;
+ u32 ctllo;
+ u32 ctlhi;
+ u32 sstat;
+ u32 dstat;
+};
+
+struct dw_dma_block {
+ struct dw_dma_lli *lli_vaddr;
+ dma_addr_t lli_dma_addr;
+};
+
+struct dw_dma_channel {
+ unsigned int state;
+ int is_cyclic;
+ struct dma_request_sg *req_sg;
+ struct dma_request_cyclic *req_cyclic;
+ unsigned int nr_blocks;
+ int direction;
+ struct dw_dma_block *block;
+};
+
+struct dw_dma_controller {
+ spinlock_t lock;
+ void * __iomem regs;
+ struct dma_pool *lli_pool;
+ struct clk *hclk;
+ struct dma_controller dma;
+ struct dw_dma_channel channel[DMAC_NR_CHANNELS];
+};
+#define to_dw_dmac(dmac) container_of(dmac, struct dw_dma_controller, dma)
+
+#define dmac_writel_hi(dmac, reg, value) \
+ __raw_writel((value), (dmac)->regs + DW_DMAC_##reg + 4)
+#define dmac_readl_hi(dmac, reg) \
+ __raw_readl((dmac)->regs + DW_DMAC_##reg + 4)
+#define dmac_writel_lo(dmac, reg, value) \
+ __raw_writel((value), (dmac)->regs + DW_DMAC_##reg)
+#define dmac_readl_lo(dmac, reg) \
+ __raw_readl((dmac)->regs + DW_DMAC_##reg)
+#define dmac_chan_writel_hi(dmac, chan, reg, value) \
+ __raw_writel((value), ((dmac)->regs + 0x58 * (chan) \
+ + DW_DMAC_CHAN_##reg + 4))
+#define dmac_chan_readl_hi(dmac, chan, reg) \
+ __raw_readl((dmac)->regs + 0x58 * (chan) + DW_DMAC_CHAN_##reg + 4)
+#define dmac_chan_writel_lo(dmac, chan, reg, value) \
+ __raw_writel((value), (dmac)->regs + 0x58 * (chan) + DW_DMAC_CHAN_##reg)
+#define dmac_chan_readl_lo(dmac, chan, reg) \
+ __raw_readl((dmac)->regs + 0x58 * (chan) + DW_DMAC_CHAN_##reg)
+#define set_channel_bit(dmac, reg, chan) \
+ dmac_writel_lo(dmac, reg, (1 << (chan)) | (1 << ((chan) + 8)))
+#define clear_channel_bit(dmac, reg, chan) \
+ dmac_writel_lo(dmac, reg, (0 << (chan)) | (1 << ((chan) + 8)))
+
+static int dmac_alloc_channel(struct dma_controller *_dmac)
+{
+ struct dw_dma_controller *dmac = to_dw_dmac(_dmac);
+ struct dw_dma_channel *chan;
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&dmac->lock, flags);
+ for (i = 0; i < DMAC_NR_CHANNELS; i++)
+ if (dmac->channel[i].state == CH_STATE_FREE)
+ break;
+
+ if (i < DMAC_NR_CHANNELS) {
+ chan = &dmac->channel[i];
+ chan->state = CH_STATE_ALLOCATED;
+ } else {
+ i = -EBUSY;
+ }
+
+ spin_unlock_irqrestore(&dmac->lock, flags);
+
+ return i;
+}
+
+static void dmac_release_channel(struct dma_controller *_dmac, int channel)
+{
+ struct dw_dma_controller *dmac = to_dw_dmac(_dmac);
+
+ BUG_ON(channel >= DMAC_NR_CHANNELS
+ || dmac->channel[channel].state != CH_STATE_ALLOCATED);
+
+ dmac->channel[channel].state = CH_STATE_FREE;
+}
+
+static struct dw_dma_block *allocate_blocks(struct dw_dma_controller *dmac,
+ unsigned int nr_blocks)
+{
+ struct dw_dma_block *block;
+ void *p;
+ unsigned int i;
+
+ block = kmalloc(nr_blocks * sizeof(*block),
+ GFP_KERNEL);
+ if (unlikely(!block))
+ return NULL;
+
+ for (i = 0; i < nr_blocks; i++) {
+ p = dma_pool_alloc(dmac->lli_pool, GFP_KERNEL,
+ &block[i].lli_dma_addr);
+ block[i].lli_vaddr = p;
+ if (unlikely(!p))
+ goto fail;
+ }
+
+ return block;
+
+fail:
+ for (i = 0; i < nr_blocks; i++) {
+ if (!block[i].lli_vaddr)
+ break;
+ dma_pool_free(dmac->lli_pool, block[i].lli_vaddr,
+ block[i].lli_dma_addr);
+ }
+ kfree(block);
+ return NULL;
+}
+
+static void cleanup_channel(struct dw_dma_controller *dmac,
+ struct dw_dma_channel *chan)
+{
+ unsigned int i;
+
+ if (chan->nr_blocks > 1) {
+ for (i = 0; i < chan->nr_blocks; i++)
+ dma_pool_free(dmac->lli_pool, chan->block[i].lli_vaddr,
+ chan->block[i].lli_dma_addr);
+ kfree(chan->block);
+ }
+
+ chan->state = CH_STATE_ALLOCATED;
+}
+
+static int dmac_prepare_request_sg(struct dma_controller *_dmac,
+ struct dma_request_sg *req)
+{
+ struct dw_dma_controller *dmac = to_dw_dmac(_dmac);
+ struct dw_dma_channel *chan;
+ unsigned long ctlhi, ctllo, cfghi, cfglo;
+ unsigned long block_size;
+ unsigned int nr_blocks;
+ int ret, i, direction;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dmac->lock, flags);
+
+ ret = -EINVAL;
+ if (req->req.channel >= DMAC_NR_CHANNELS
+ || dmac->channel[req->req.channel].state != CH_STATE_ALLOCATED
+ || req->block_size > DMAC_MAX_BLOCKSIZE) {
+ spin_unlock_irqrestore(&dmac->lock, flags);
+ return -EINVAL;
+ }
+
+ chan = &dmac->channel[req->req.channel];
+ chan->state = CH_STATE_BUSY;
+ chan->req_sg = req;
+ chan->is_cyclic = 0;
+
+ /*
+ * We have marked the channel as busy, so no need to keep the
+ * lock as long as we only touch the channel-specific
+ * registers
+ */
+ spin_unlock_irqrestore(&dmac->lock, flags);
+
+ /*
+ * There may be limitations in the driver and/or the DMA
+ * controller that prevents us from sending a whole
+ * scatterlist item in one go. Taking this into account,
+ * calculate the number of block transfers we need to set up.
+ *
+ * FIXME: Let the peripheral driver know about the maximum
+ * block size we support. We really don't want to use a
+ * different block size than what was suggested by the
+ * peripheral.
+ *
+ * Each block will get its own Linked List Item (LLI) below.
+ */
+ block_size = req->block_size;
+ nr_blocks = req->nr_blocks;
+ pr_debug("block_size %lu, nr_blocks %u nr_sg = %u\n",
+ block_size, nr_blocks, req->nr_sg);
+
+ BUG_ON(nr_blocks == 0);
+ chan->nr_blocks = nr_blocks;
+
+ ret = -EINVAL;
+ cfglo = cfghi = 0;
+ switch (req->direction) {
+ case DMA_DIR_MEM_TO_PERIPH:
+ direction = DMA_TO_DEVICE;
+ cfghi = req->periph_id << (43 - 32);
+ break;
+
+ case DMA_DIR_PERIPH_TO_MEM:
+ direction = DMA_FROM_DEVICE;
+ cfghi = req->periph_id << (39 - 32);
+ break;
+ default:
+ goto out_unclaim_channel;
+ }
+
+ chan->direction = direction;
+
+ dmac_chan_writel_hi(dmac, req->req.channel, CFG, cfghi);
+ dmac_chan_writel_lo(dmac, req->req.channel, CFG, cfglo);
+
+ ctlhi = block_size >> req->width;
+ ctllo = ((req->direction << 20)
+ // | (1 << 14) | (1 << 11) // source/dest burst trans len
+ | (req->width << 4) | (req->width << 1)
+ | (1 << 0)); // interrupt enable
+
+ if (nr_blocks == 1) {
+ /* Only one block: No need to use block chaining */
+ if (direction == DMA_TO_DEVICE) {
+ dmac_chan_writel_lo(dmac, req->req.channel, SAR,
+ req->sg->dma_address);
+ dmac_chan_writel_lo(dmac, req->req.channel, DAR,
+ req->data_reg);
+ ctllo |= 2 << 7; // no dst increment
+ } else {
+ dmac_chan_writel_lo(dmac, req->req.channel, SAR,
+ req->data_reg);
+ dmac_chan_writel_lo(dmac, req->req.channel, DAR,
+ req->sg->dma_address);
+ ctllo |= 2 << 9; // no src increment
+ }
+ dmac_chan_writel_lo(dmac, req->req.channel, CTL, ctllo);
+ dmac_chan_writel_hi(dmac, req->req.channel, CTL, ctlhi);
+ pr_debug("ctl hi:lo 0x%lx:%lx\n", ctlhi, ctllo);
+ } else {
+ struct dw_dma_lli *lli, *lli_prev = NULL;
+ int j = 0, offset = 0;
+
+ ret = -ENOMEM;
+ chan->block = allocate_blocks(dmac, nr_blocks);
+ if (!chan->block)
+ goto out_unclaim_channel;
+
+ if (direction == DMA_TO_DEVICE)
+ ctllo |= 1 << 28 | 1 << 27 | 2 << 7;
+ else
+ ctllo |= 1 << 28 | 1 << 27 | 2 << 9;
+
+ /*
+ * Map scatterlist items to blocks. One scatterlist
+ * item may need more than one block for the reasons
+ * mentioned above.
+ */
+ for (i = 0; i < nr_blocks; i++) {
+ lli = chan->block[i].lli_vaddr;
+ if (lli_prev) {
+ lli_prev->llp = chan->block[i].lli_dma_addr;
+ pr_debug("lli[%d] (0x%p/0x%x): 0x%x 0x%x 0x%x 0x%x 0x%x\n",
+ i - 1, chan->block[i - 1].lli_vaddr,
+ chan->block[i - 1].lli_dma_addr,
+ lli_prev->sar, lli_prev->dar, lli_prev->llp,
+ lli_prev->ctllo, lli_prev->ctlhi);
+ }
+ lli->llp = 0;
+ lli->ctllo = ctllo;
+ lli->ctlhi = ctlhi;
+ if (direction == DMA_TO_DEVICE) {
+ lli->sar = req->sg[j].dma_address + offset;
+ lli->dar = req->data_reg;
+ } else {
+ lli->sar = req->data_reg;
+ lli->dar = req->sg[j].dma_address + offset;
+ }
+ lli_prev = lli;
+
+ offset += block_size;
+ if (offset > req->sg[j].length) {
+ j++;
+ offset = 0;
+ }
+ }
+
+ pr_debug("lli[%d] (0x%p/0x%x): 0x%x 0x%x 0x%x 0x%x 0x%x\n",
+ i - 1, chan->block[i - 1].lli_vaddr,
+ chan->block[i - 1].lli_dma_addr, lli_prev->sar,
+ lli_prev->dar, lli_prev->llp,
+ lli_prev->ctllo, lli_prev->ctlhi);
+
+ /*
+ * SAR, DAR and CTL are initialized from the LLI. We
+ * only have to enable the LLI bits in CTL.
+ */
+ dmac_chan_writel_hi(dmac, req->req.channel, CTL, 0);
+ dmac_chan_writel_lo(dmac, req->req.channel, LLP,
+ chan->block[0].lli_dma_addr);
+ dmac_chan_writel_lo(dmac, req->req.channel, CTL, 1 << 28 | 1 << 27);
+ }
+
+ set_channel_bit(dmac, MASK_XFER, req->req.channel);
+ set_channel_bit(dmac, MASK_ERROR, req->req.channel);
+ if (req->req.block_complete)
+ set_channel_bit(dmac, MASK_BLOCK, req->req.channel);
+ else
+ clear_channel_bit(dmac, MASK_BLOCK, req->req.channel);
+
+ return 0;
+
+out_unclaim_channel:
+ chan->state = CH_STATE_ALLOCATED;
+ return ret;
+}
+
+static int dmac_prepare_request_cyclic(struct dma_controller *_dmac,
+ struct dma_request_cyclic *req)
+{
+ struct dw_dma_controller *dmac = to_dw_dmac(_dmac);
+ struct dw_dma_channel *chan;
+ unsigned long ctlhi, ctllo, cfghi, cfglo;
+ unsigned long block_size;
+ int ret, i, direction;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dmac->lock, flags);
+
+ block_size = (req->buffer_size/req->periods) >> req->width;
+
+ ret = -EINVAL;
+ if (req->req.channel >= DMAC_NR_CHANNELS
+ || dmac->channel[req->req.channel].state != CH_STATE_ALLOCATED
+ || (req->periods == 0)
+ || block_size > DMAC_MAX_BLOCKSIZE) {
+ spin_unlock_irqrestore(&dmac->lock, flags);
+ return -EINVAL;
+ }
+
+ chan = &dmac->channel[req->req.channel];
+ chan->state = CH_STATE_BUSY;
+ chan->is_cyclic = 1;
+ chan->req_cyclic = req;
+
+ /*
+ * We have marked the channel as busy, so no need to keep the
+ * lock as long as we only touch the channel-specific
+ * registers
+ */
+ spin_unlock_irqrestore(&dmac->lock, flags);
+
+ /*
+ Setup
+ */
+ BUG_ON(req->buffer_size % req->periods);
+ /* printk(KERN_INFO "block_size = %lu, periods = %u\n", block_size, req->periods); */
+
+ chan->nr_blocks = req->periods;
+
+ ret = -EINVAL;
+ cfglo = cfghi = 0;
+ switch (req->direction) {
+ case DMA_DIR_MEM_TO_PERIPH:
+ direction = DMA_TO_DEVICE;
+ cfghi = req->periph_id << (43 - 32);
+ break;
+
+ case DMA_DIR_PERIPH_TO_MEM:
+ direction = DMA_FROM_DEVICE;
+ cfghi = req->periph_id << (39 - 32);
+ break;
+ default:
+ goto out_unclaim_channel;
+ }
+
+ chan->direction = direction;
+
+ dmac_chan_writel_hi(dmac, req->req.channel, CFG, cfghi);
+ dmac_chan_writel_lo(dmac, req->req.channel, CFG, cfglo);
+
+ ctlhi = block_size;
+ ctllo = ((req->direction << 20)
+ | (req->width << 4) | (req->width << 1)
+ | (1 << 0)); // interrupt enable
+
+ {
+ struct dw_dma_lli *lli = NULL, *lli_prev = NULL;
+
+ ret = -ENOMEM;
+ chan->block = allocate_blocks(dmac, req->periods);
+ if (!chan->block)
+ goto out_unclaim_channel;
+
+ if (direction == DMA_TO_DEVICE)
+ ctllo |= 1 << 28 | 1 << 27 | 2 << 7;
+ else
+ ctllo |= 1 << 28 | 1 << 27 | 2 << 9;
+
+ /*
+ * Set up a linked list items where each period gets
+ * an item. The linked list item for the last period
+ * points back to the star of the buffer making a
+ * cyclic buffer.
+ */
+ for (i = 0; i < req->periods; i++) {
+ lli = chan->block[i].lli_vaddr;
+ if (lli_prev) {
+ lli_prev->llp = chan->block[i].lli_dma_addr;
+ /* printk(KERN_INFO "lli[%d] (0x%p/0x%x): 0x%x 0x%x 0x%x 0x%x 0x%x\n",
+ i - 1, chan->block[i - 1].lli_vaddr,
+ chan->block[i - 1].lli_dma_addr,
+ lli_prev->sar, lli_prev->dar, lli_prev->llp,
+ lli_prev->ctllo, lli_prev->ctlhi);*/
+ }
+ lli->llp = 0;
+ lli->ctllo = ctllo;
+ lli->ctlhi = ctlhi;
+ if (direction == DMA_TO_DEVICE) {
+ lli->sar = req->buffer_start + i*(block_size << req->width);
+ lli->dar = req->data_reg;
+ } else {
+ lli->sar = req->data_reg;
+ lli->dar = req->buffer_start + i*(block_size << req->width);
+ }
+ lli_prev = lli;
+ }
+ lli->llp = chan->block[0].lli_dma_addr;
+
+ /*printk(KERN_INFO "lli[%d] (0x%p/0x%x): 0x%x 0x%x 0x%x 0x%x 0x%x\n",
+ i - 1, chan->block[i - 1].lli_vaddr,
+ chan->block[i - 1].lli_dma_addr, lli_prev->sar,
+ lli_prev->dar, lli_prev->llp,
+ lli_prev->ctllo, lli_prev->ctlhi); */
+
+ /*
+ * SAR, DAR and CTL are initialized from the LLI. We
+ * only have to enable the LLI bits in CTL.
+ */
+ dmac_chan_writel_lo(dmac, req->req.channel, LLP,
+ chan->block[0].lli_dma_addr);
+ dmac_chan_writel_lo(dmac, req->req.channel, CTL, 1 << 28 | 1 << 27);
+ }
+
+ clear_channel_bit(dmac, MASK_XFER, req->req.channel);
+ set_channel_bit(dmac, MASK_ERROR, req->req.channel);
+ if (req->req.block_complete)
+ set_channel_bit(dmac, MASK_BLOCK, req->req.channel);
+ else
+ clear_channel_bit(dmac, MASK_BLOCK, req->req.channel);
+
+ return 0;
+
+out_unclaim_channel:
+ chan->state = CH_STATE_ALLOCATED;
+ return ret;
+}
+
+static int dmac_start_request(struct dma_controller *_dmac,
+ unsigned int channel)
+{
+ struct dw_dma_controller *dmac = to_dw_dmac(_dmac);
+
+ BUG_ON(channel >= DMAC_NR_CHANNELS);
+
+ set_channel_bit(dmac, CH_EN, channel);
+
+ return 0;
+}
+
+static dma_addr_t dmac_get_current_pos(struct dma_controller *_dmac,
+ unsigned int channel)
+{
+ struct dw_dma_controller *dmac = to_dw_dmac(_dmac);
+ struct dw_dma_channel *chan;
+ dma_addr_t current_pos;
+
+ BUG_ON(channel >= DMAC_NR_CHANNELS);
+
+ chan = &dmac->channel[channel];
+
+ switch (chan->direction) {
+ case DMA_TO_DEVICE:
+ current_pos = dmac_chan_readl_lo(dmac, channel, SAR);
+ break;
+ case DMA_FROM_DEVICE:
+ current_pos = dmac_chan_readl_lo(dmac, channel, DAR);
+ break;
+ default:
+ return 0;
+ }
+
+
+ if (!current_pos) {
+ if (chan->is_cyclic) {
+ current_pos = chan->req_cyclic->buffer_start;
+ } else {
+ current_pos = chan->req_sg->sg->dma_address;
+ }
+ }
+
+ return current_pos;
+}
+
+
+static int dmac_stop_request(struct dma_controller *_dmac,
+ unsigned int channel)
+{
+ struct dw_dma_controller *dmac = to_dw_dmac(_dmac);
+ struct dw_dma_channel *chan;
+
+ BUG_ON(channel >= DMAC_NR_CHANNELS);
+
+ chan = &dmac->channel[channel];
+ pr_debug("stop: st%u s%08x d%08x l%08x ctl0x%08x:0x%08x\n",
+ chan->state, dmac_chan_readl_lo(dmac, channel, SAR),
+ dmac_chan_readl_lo(dmac, channel, DAR),
+ dmac_chan_readl_lo(dmac, channel, LLP),
+ dmac_chan_readl_hi(dmac, channel, CTL),
+ dmac_chan_readl_lo(dmac, channel, CTL));
+
+ if (chan->state == CH_STATE_BUSY) {
+ clear_channel_bit(dmac, CH_EN, channel);
+ cleanup_channel(dmac, &dmac->channel[channel]);
+ }
+
+ return 0;
+}
+
+
+static void dmac_block_complete(struct dw_dma_controller *dmac)
+{
+ struct dw_dma_channel *chan;
+ unsigned long status, chanid;
+
+ status = dmac_readl_lo(dmac, STATUS_BLOCK);
+
+ while (status) {
+ struct dma_request *req;
+ chanid = __ffs(status);
+ chan = &dmac->channel[chanid];
+
+ if (chan->is_cyclic) {
+ BUG_ON(!chan->req_cyclic
+ || !chan->req_cyclic->req.block_complete);
+ req = &chan->req_cyclic->req;
+ } else {
+ BUG_ON(!chan->req_sg || !chan->req_sg->req.block_complete);
+ req = &chan->req_sg->req;
+ }
+ dmac_writel_lo(dmac, CLEAR_BLOCK, 1 << chanid);
+ req->block_complete(req);
+ status = dmac_readl_lo(dmac, STATUS_BLOCK);
+ }
+}
+
+static void dmac_xfer_complete(struct dw_dma_controller *dmac)
+{
+ struct dw_dma_channel *chan;
+ struct dma_request *req;
+ unsigned long status, chanid;
+
+ status = dmac_readl_lo(dmac, STATUS_XFER);
+
+ while (status) {
+ chanid = __ffs(status);
+ chan = &dmac->channel[chanid];
+
+ dmac_writel_lo(dmac, CLEAR_XFER, 1 << chanid);
+
+ req = &chan->req_sg->req;
+ BUG_ON(!req);
+ cleanup_channel(dmac, chan);
+ if (req->xfer_complete)
+ req->xfer_complete(req);
+
+ status = dmac_readl_lo(dmac, STATUS_XFER);
+ }
+}
+
+static void dmac_error(struct dw_dma_controller *dmac)
+{
+ struct dw_dma_channel *chan;
+ unsigned long status, chanid;
+
+ status = dmac_readl_lo(dmac, STATUS_ERROR);
+
+ while (status) {
+ struct dma_request *req;
+
+ chanid = __ffs(status);
+ chan = &dmac->channel[chanid];
+
+ dmac_writel_lo(dmac, CLEAR_ERROR, 1 << chanid);
+ clear_channel_bit(dmac, CH_EN, chanid);
+
+ if (chan->is_cyclic) {
+ BUG_ON(!chan->req_cyclic);
+ req = &chan->req_cyclic->req;
+ } else {
+ BUG_ON(!chan->req_sg);
+ req = &chan->req_sg->req;
+ }
+
+ cleanup_channel(dmac, chan);
+ if (req->error)
+ req->error(req);
+
+ status = dmac_readl_lo(dmac, STATUS_XFER);
+ }
+}
+
+static irqreturn_t dmac_interrupt(int irq, void *dev_id)
+{
+ struct dw_dma_controller *dmac = dev_id;
+ unsigned long status;
+ int ret = IRQ_NONE;
+
+ spin_lock(&dmac->lock);
+
+ status = dmac_readl_lo(dmac, STATUS_INT);
+
+ while (status) {
+ ret = IRQ_HANDLED;
+ if (status & 0x10)
+ dmac_error(dmac);
+ if (status & 0x02)
+ dmac_block_complete(dmac);
+ if (status & 0x01)
+ dmac_xfer_complete(dmac);
+
+ status = dmac_readl_lo(dmac, STATUS_INT);
+ }
+
+ spin_unlock(&dmac->lock);
+ return ret;
+}
+
+static int __devinit dmac_probe(struct platform_device *pdev)
+{
+ struct dw_dma_controller *dmac;
+ struct resource *regs;
+ int ret;
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs)
+ return -ENXIO;
+
+ dmac = kmalloc(sizeof(*dmac), GFP_KERNEL);
+ if (!dmac)
+ return -ENOMEM;
+ memset(dmac, 0, sizeof(*dmac));
+
+ dmac->hclk = clk_get(&pdev->dev, "hclk");
+ if (IS_ERR(dmac->hclk)) {
+ ret = PTR_ERR(dmac->hclk);
+ goto out_free_dmac;
+ }
+ clk_enable(dmac->hclk);
+
+ ret = -ENOMEM;
+ dmac->lli_pool = dma_pool_create("dmac", &pdev->dev,
+ sizeof(struct dw_dma_lli), 4, 0);
+ if (!dmac->lli_pool)
+ goto out_disable_clk;
+
+ spin_lock_init(&dmac->lock);
+ dmac->dma.dev = &pdev->dev;
+ dmac->dma.alloc_channel = dmac_alloc_channel;
+ dmac->dma.release_channel = dmac_release_channel;
+ dmac->dma.prepare_request_sg = dmac_prepare_request_sg;
+ dmac->dma.prepare_request_cyclic = dmac_prepare_request_cyclic;
+ dmac->dma.start_request = dmac_start_request;
+ dmac->dma.stop_request = dmac_stop_request;
+ dmac->dma.get_current_pos = dmac_get_current_pos;
+
+ dmac->regs = ioremap(regs->start, regs->end - regs->start + 1);
+ if (!dmac->regs)
+ goto out_free_pool;
+
+ ret = request_irq(platform_get_irq(pdev, 0), dmac_interrupt,
+ IRQF_SAMPLE_RANDOM, pdev->name, dmac);
+ if (ret)
+ goto out_unmap_regs;
+
+ /* Enable the DMA controller */
+ dmac_writel_lo(dmac, CFG, 1);
+
+ register_dma_controller(&dmac->dma);
+
+ printk(KERN_INFO
+ "dmac%d: DesignWare DMA controller at 0x%p irq %d\n",
+ dmac->dma.id, dmac->regs, platform_get_irq(pdev, 0));
+
+ return 0;
+
+out_unmap_regs:
+ iounmap(dmac->regs);
+out_free_pool:
+ dma_pool_destroy(dmac->lli_pool);
+out_disable_clk:
+ clk_disable(dmac->hclk);
+ clk_put(dmac->hclk);
+out_free_dmac:
+ kfree(dmac);
+ return ret;
+}
+
+static struct platform_driver dmac_driver = {
+ .probe = dmac_probe,
+ .driver = {
+ .name = "dmaca",
+ },
+};
+
+static int __init dmac_init(void)
+{
+ return platform_driver_register(&dmac_driver);
+}
+subsys_initcall(dmac_init);
+
+static void __exit dmac_exit(void)
+{
+ platform_driver_unregister(&dmac_driver);
+}
+module_exit(dmac_exit);
+
+MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller driver");
+MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
+MODULE_LICENSE("GPL");
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/drivers/dw-dmac.h avr32-2.6/arch/avr32/drivers/dw-dmac.h
--- linux-2.6.25.6/arch/avr32/drivers/dw-dmac.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/drivers/dw-dmac.h 2008-06-12 15:09:38.719815350 +0200
@@ -0,0 +1,42 @@
+/*
+ * Driver for the Synopsys DesignWare DMA Controller
+ *
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __AVR32_DW_DMAC_H__
+#define __AVR32_DW_DMAC_H__
+
+#define DW_DMAC_CFG 0x398
+#define DW_DMAC_CH_EN 0x3a0
+
+#define DW_DMAC_STATUS_XFER 0x2e8
+#define DW_DMAC_STATUS_BLOCK 0x2f0
+#define DW_DMAC_STATUS_ERROR 0x308
+
+#define DW_DMAC_MASK_XFER 0x310
+#define DW_DMAC_MASK_BLOCK 0x318
+#define DW_DMAC_MASK_ERROR 0x330
+
+#define DW_DMAC_CLEAR_XFER 0x338
+#define DW_DMAC_CLEAR_BLOCK 0x340
+#define DW_DMAC_CLEAR_ERROR 0x358
+
+#define DW_DMAC_STATUS_INT 0x360
+
+#define DW_DMAC_CHAN_SAR 0x000
+#define DW_DMAC_CHAN_DAR 0x008
+#define DW_DMAC_CHAN_LLP 0x010
+#define DW_DMAC_CHAN_CTL 0x018
+#define DW_DMAC_CHAN_SSTAT 0x020
+#define DW_DMAC_CHAN_DSTAT 0x028
+#define DW_DMAC_CHAN_SSTATAR 0x030
+#define DW_DMAC_CHAN_DSTATAR 0x038
+#define DW_DMAC_CHAN_CFG 0x040
+#define DW_DMAC_CHAN_SGR 0x048
+#define DW_DMAC_CHAN_DSR 0x050
+
+#endif /* __AVR32_DW_DMAC_H__ */
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/drivers/Makefile avr32-2.6/arch/avr32/drivers/Makefile
--- linux-2.6.25.6/arch/avr32/drivers/Makefile 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/drivers/Makefile 2008-06-12 15:09:38.719815350 +0200
@@ -0,0 +1 @@
+obj-$(CONFIG_DW_DMAC) += dw-dmac.o
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/Kconfig avr32-2.6/arch/avr32/Kconfig
--- linux-2.6.25.6/arch/avr32/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/Kconfig 2008-06-12 15:09:38.711815728 +0200
@@ -47,6 +47,9 @@
config GENERIC_TIME
def_bool y
+config GENERIC_CLOCKEVENTS
+ def_bool y
+
config RWSEM_XCHGADD_ALGORITHM
def_bool n
@@ -70,6 +73,8 @@
menu "System Type and features"
+source "kernel/time/Kconfig"
+
config SUBARCH_AVR32B
bool
config MMU
@@ -83,6 +88,7 @@
select MMU
select PERFORMANCE_COUNTERS
select HAVE_GPIO_LIB
+ select GENERIC_ALLOCATOR
#
# CPU types
@@ -117,6 +123,9 @@
if BOARD_ATSTK1000
source "arch/avr32/boards/atstk1000/Kconfig"
endif
+if BOARD_ATNGW100
+source "arch/avr32/boards/atngw100/Kconfig"
+endif
choice
prompt "Boot loader type"
@@ -180,6 +189,10 @@
be dumped to the console when a Non-Maskable Interrupt
happens.
+config DW_DMAC
+ tristate "Synopsys DesignWare DMA Controller support"
+ default y if CPU_AT32AP7000
+
# FPU emulation goes here
source "kernel/Kconfig.hz"
@@ -196,6 +209,11 @@
menu "Power management options"
+config ARCH_SUSPEND_POSSIBLE
+ def_bool y
+
+source "kernel/power/Kconfig"
+
menu "CPU Frequency scaling"
source "drivers/cpufreq/Kconfig"
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/kernel/avr32_ksyms.c avr32-2.6/arch/avr32/kernel/avr32_ksyms.c
--- linux-2.6.25.6/arch/avr32/kernel/avr32_ksyms.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/kernel/avr32_ksyms.c 2008-06-12 15:03:55.883815569 +0200
@@ -29,7 +29,9 @@
*/
EXPORT_SYMBOL(memset);
EXPORT_SYMBOL(memcpy);
+
EXPORT_SYMBOL(clear_page);
+EXPORT_SYMBOL(copy_page);
/*
* Userspace access stuff.
@@ -41,6 +43,8 @@
EXPORT_SYMBOL(__strncpy_from_user);
EXPORT_SYMBOL(clear_user);
EXPORT_SYMBOL(__clear_user);
+EXPORT_SYMBOL(strnlen_user);
+
EXPORT_SYMBOL(csum_partial);
EXPORT_SYMBOL(csum_partial_copy_generic);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/kernel/dma-controller.c avr32-2.6/arch/avr32/kernel/dma-controller.c
--- linux-2.6.25.6/arch/avr32/kernel/dma-controller.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/kernel/dma-controller.c 2008-06-12 15:09:38.719815350 +0200
@@ -0,0 +1,34 @@
+/*
+ * Preliminary DMA controller framework for AVR32
+ *
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <asm/dma-controller.h>
+
+static LIST_HEAD(controllers);
+
+int register_dma_controller(struct dma_controller *dmac)
+{
+ static int next_id;
+
+ dmac->id = next_id++;
+ list_add_tail(&dmac->list, &controllers);
+
+ return 0;
+}
+EXPORT_SYMBOL(register_dma_controller);
+
+struct dma_controller *find_dma_controller(int id)
+{
+ struct dma_controller *dmac;
+
+ list_for_each_entry(dmac, &controllers, list)
+ if (dmac->id == id)
+ return dmac;
+ return NULL;
+}
+EXPORT_SYMBOL(find_dma_controller);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/kernel/entry-avr32b.S avr32-2.6/arch/avr32/kernel/entry-avr32b.S
--- linux-2.6.25.6/arch/avr32/kernel/entry-avr32b.S 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/kernel/entry-avr32b.S 2008-06-12 15:03:55.883815569 +0200
@@ -741,26 +741,6 @@
.section .irq.text,"ax",@progbits
-.global cpu_idle_sleep
-cpu_idle_sleep:
- mask_interrupts
- get_thread_info r8
- ld.w r9, r8[TI_flags]
- bld r9, TIF_NEED_RESCHED
- brcs cpu_idle_enable_int_and_exit
- sbr r9, TIF_CPU_GOING_TO_SLEEP
- st.w r8[TI_flags], r9
- unmask_interrupts
- sleep 0
-cpu_idle_skip_sleep:
- mask_interrupts
- ld.w r9, r8[TI_flags]
- cbr r9, TIF_CPU_GOING_TO_SLEEP
- st.w r8[TI_flags], r9
-cpu_idle_enable_int_and_exit:
- unmask_interrupts
- retal r12
-
.global irq_level0
.global irq_level1
.global irq_level2
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/kernel/Makefile avr32-2.6/arch/avr32/kernel/Makefile
--- linux-2.6.25.6/arch/avr32/kernel/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/kernel/Makefile 2008-06-12 15:09:38.719815350 +0200
@@ -9,6 +9,7 @@
obj-y += setup.o traps.o semaphore.o ocd.o ptrace.o
obj-y += signal.o sys_avr32.o process.o time.o
obj-y += init_task.o switch_to.o cpu.o
+obj-y += dma-controller.o
obj-$(CONFIG_MODULES) += module.o avr32_ksyms.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/kernel/process.c avr32-2.6/arch/avr32/kernel/process.c
--- linux-2.6.25.6/arch/avr32/kernel/process.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/kernel/process.c 2008-06-12 15:03:55.887814682 +0200
@@ -18,11 +18,11 @@
#include <asm/sysreg.h>
#include <asm/ocd.h>
+#include <asm/arch/pm.h>
+
void (*pm_power_off)(void) = NULL;
EXPORT_SYMBOL(pm_power_off);
-extern void cpu_idle_sleep(void);
-
/*
* This file handles the architecture-dependent parts of process handling..
*/
@@ -54,6 +54,8 @@
void machine_power_off(void)
{
+ if (pm_power_off)
+ pm_power_off();
}
void machine_restart(char *cmd)
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/kernel/setup.c avr32-2.6/arch/avr32/kernel/setup.c
--- linux-2.6.25.6/arch/avr32/kernel/setup.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/kernel/setup.c 2008-06-12 15:03:55.887814682 +0200
@@ -274,6 +274,8 @@
printk(KERN_WARNING
"Failed to allocate framebuffer memory\n");
fbmem_size = 0;
+ } else {
+ memset(__va(fbmem_start), 0, fbmem_size);
}
}
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/kernel/signal.c avr32-2.6/arch/avr32/kernel/signal.c
--- linux-2.6.25.6/arch/avr32/kernel/signal.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/kernel/signal.c 2008-06-12 15:09:38.719815350 +0200
@@ -93,6 +93,9 @@
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
+ if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
+ goto badframe;
+
pr_debug("Context restored: pc = %08lx, lr = %08lx, sp = %08lx\n",
regs->pc, regs->lr, regs->sp);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/kernel/time.c avr32-2.6/arch/avr32/kernel/time.c
--- linux-2.6.25.6/arch/avr32/kernel/time.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/kernel/time.c 2008-06-12 15:03:55.887814682 +0200
@@ -1,16 +1,12 @@
/*
* Copyright (C) 2004-2007 Atmel Corporation
*
- * Based on MIPS implementation arch/mips/kernel/time.c
- * Copyright 2001 MontaVista Software Inc.
- *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-
#include <linux/clk.h>
-#include <linux/clocksource.h>
+#include <linux/clockchips.h>
#include <linux/time.h>
#include <linux/module.h>
#include <linux/interrupt.h>
@@ -27,207 +23,133 @@
#include <asm/io.h>
#include <asm/sections.h>
-/* how many counter cycles in a jiffy? */
-static u32 cycles_per_jiffy;
+#include <asm/arch/pm.h>
-/* the count value for the next timer interrupt */
-static u32 expirelo;
-cycle_t __weak read_cycle_count(void)
+static cycle_t read_cycle_count(void)
{
return (cycle_t)sysreg_read(COUNT);
}
-struct clocksource __weak clocksource_avr32 = {
- .name = "avr32",
- .rating = 350,
+/*
+ * The architectural cycle count registers are a fine clocksource unless
+ * the system idle loop use sleep states like "idle": the CPU cycles
+ * measured by COUNT (and COMPARE) don't happen during sleep states.
+ * Their duration also changes if cpufreq changes the CPU clock rate.
+ * So we rate the clocksource using COUNT as very low quality.
+ */
+static struct clocksource counter = {
+ .name = "avr32_counter",
+ .rating = 50,
.read = read_cycle_count,
.mask = CLOCKSOURCE_MASK(32),
.shift = 16,
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-irqreturn_t __weak timer_interrupt(int irq, void *dev_id);
-
-struct irqaction timer_irqaction = {
- .handler = timer_interrupt,
- .flags = IRQF_DISABLED,
- .name = "timer",
-};
-
-/*
- * By default we provide the null RTC ops
- */
-static unsigned long null_rtc_get_time(void)
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
{
- return mktime(2007, 1, 1, 0, 0, 0);
-}
-
-static int null_rtc_set_time(unsigned long sec)
-{
- return 0;
-}
+ struct clock_event_device *evdev = dev_id;
-static unsigned long (*rtc_get_time)(void) = null_rtc_get_time;
-static int (*rtc_set_time)(unsigned long) = null_rtc_set_time;
-
-static void avr32_timer_ack(void)
-{
- u32 count;
-
- /* Ack this timer interrupt and set the next one */
- expirelo += cycles_per_jiffy;
- /* setting COMPARE to 0 stops the COUNT-COMPARE */
- if (expirelo == 0) {
- sysreg_write(COMPARE, expirelo + 1);
- } else {
- sysreg_write(COMPARE, expirelo);
- }
+ /*
+ * Disable the interrupt until the clockevent subsystem
+ * reprograms it.
+ */
+ sysreg_write(COMPARE, 0);
- /* Check to see if we have missed any timer interrupts */
- count = sysreg_read(COUNT);
- if ((count - expirelo) < 0x7fffffff) {
- expirelo = count + cycles_per_jiffy;
- sysreg_write(COMPARE, expirelo);
- }
+ evdev->event_handler(evdev);
+ return IRQ_HANDLED;
}
-int __weak avr32_hpt_init(void)
-{
- int ret;
- unsigned long mult, shift, count_hz;
-
- count_hz = clk_get_rate(boot_cpu_data.clk);
- shift = clocksource_avr32.shift;
- mult = clocksource_hz2mult(count_hz, shift);
- clocksource_avr32.mult = mult;
-
- {
- u64 tmp;
-
- tmp = TICK_NSEC;
- tmp <<= shift;
- tmp += mult / 2;
- do_div(tmp, mult);
-
- cycles_per_jiffy = tmp;
- }
+static struct irqaction timer_irqaction = {
+ .handler = timer_interrupt,
+ .flags = IRQF_TIMER | IRQF_DISABLED,
+ .name = "avr32_comparator",
+};
- ret = setup_irq(0, &timer_irqaction);
- if (ret) {
- pr_debug("timer: could not request IRQ 0: %d\n", ret);
- return -ENODEV;
- }
+static int comparator_next_event(unsigned long delta,
+ struct clock_event_device *evdev)
+{
+ unsigned long flags;
- printk(KERN_INFO "timer: AT32AP COUNT-COMPARE at irq 0, "
- "%lu.%03lu MHz\n",
- ((count_hz + 500) / 1000) / 1000,
- ((count_hz + 500) / 1000) % 1000);
+ raw_local_irq_save(flags);
- return 0;
-}
+ /* The time to read COUNT then update COMPARE must be less
+ * than the min_delta_ns value for this clockevent source.
+ */
+ sysreg_write(COMPARE, (sysreg_read(COUNT) + delta) ? : 1);
-/*
- * Taken from MIPS c0_hpt_timer_init().
- *
- * The reason COUNT is written twice is probably to make sure we don't get any
- * timer interrupts while we are messing with the counter.
- */
-int __weak avr32_hpt_start(void)
-{
- u32 count = sysreg_read(COUNT);
- expirelo = (count / cycles_per_jiffy + 1) * cycles_per_jiffy;
- sysreg_write(COUNT, expirelo - cycles_per_jiffy);
- sysreg_write(COMPARE, expirelo);
- sysreg_write(COUNT, count);
+ raw_local_irq_restore(flags);
return 0;
}
-/*
- * local_timer_interrupt() does profiling and process accounting on a
- * per-CPU basis.
- *
- * In UP mode, it is invoked from the (global) timer_interrupt.
- */
-void local_timer_interrupt(int irq, void *dev_id)
+static void comparator_mode(enum clock_event_mode mode,
+ struct clock_event_device *evdev)
{
- if (current->pid)
- profile_tick(CPU_PROFILING);
- update_process_times(user_mode(get_irq_regs()));
+ switch (mode) {
+ case CLOCK_EVT_MODE_ONESHOT:
+ pr_debug("%s: start\n", evdev->name);
+ /* FALLTHROUGH */
+ case CLOCK_EVT_MODE_RESUME:
+ cpu_disable_idle_sleep();
+ break;
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ sysreg_write(COMPARE, 0);
+ pr_debug("%s: stop\n", evdev->name);
+ cpu_enable_idle_sleep();
+ break;
+ default:
+ BUG();
+ }
}
-irqreturn_t __weak timer_interrupt(int irq, void *dev_id)
-{
- /* ack timer interrupt and try to set next interrupt */
- avr32_timer_ack();
-
- /*
- * Call the generic timer interrupt handler
- */
- write_seqlock(&xtime_lock);
- do_timer(1);
- write_sequnlock(&xtime_lock);
-
- /*
- * In UP mode, we call local_timer_interrupt() to do profiling
- * and process accounting.
- *
- * SMP is not supported yet.
- */
- local_timer_interrupt(irq, dev_id);
-
- return IRQ_HANDLED;
-}
+static struct clock_event_device comparator = {
+ .name = "avr32_comparator",
+ .features = CLOCK_EVT_FEAT_ONESHOT,
+ .shift = 16,
+ .rating = 50,
+ .cpumask = CPU_MASK_CPU0,
+ .set_next_event = comparator_next_event,
+ .set_mode = comparator_mode,
+};
void __init time_init(void)
{
+ unsigned long counter_hz;
int ret;
- /*
- * Make sure we don't get any COMPARE interrupts before we can
- * handle them.
- */
- sysreg_write(COMPARE, 0);
-
- xtime.tv_sec = rtc_get_time();
+ xtime.tv_sec = mktime(2007, 1, 1, 0, 0, 0);
xtime.tv_nsec = 0;
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
- ret = avr32_hpt_init();
- if (ret) {
- pr_debug("timer: failed setup: %d\n", ret);
- return;
- }
+ /* figure rate for counter */
+ counter_hz = clk_get_rate(boot_cpu_data.clk);
+ counter.mult = clocksource_hz2mult(counter_hz, counter.shift);
- ret = clocksource_register(&clocksource_avr32);
+ ret = clocksource_register(&counter);
if (ret)
pr_debug("timer: could not register clocksource: %d\n", ret);
- ret = avr32_hpt_start();
- if (ret) {
- pr_debug("timer: failed starting: %d\n", ret);
- return;
- }
-}
+ /* setup COMPARE clockevent */
+ comparator.mult = div_sc(counter_hz, NSEC_PER_SEC, comparator.shift);
+ comparator.max_delta_ns = clockevent_delta2ns((u32)~0, &comparator);
+ comparator.min_delta_ns = clockevent_delta2ns(50, &comparator) + 1;
-static struct sysdev_class timer_class = {
- .name = "timer",
-};
+ sysreg_write(COMPARE, 0);
+ timer_irqaction.dev_id = &comparator;
-static struct sys_device timer_device = {
- .id = 0,
- .cls = &timer_class,
-};
+ ret = setup_irq(0, &timer_irqaction);
+ if (ret)
+ pr_debug("timer: could not request IRQ 0: %d\n", ret);
+ else {
+ clockevents_register_device(&comparator);
-static int __init init_timer_sysfs(void)
-{
- int err = sysdev_class_register(&timer_class);
- if (!err)
- err = sysdev_register(&timer_device);
- return err;
+ pr_info("%s: irq 0, %lu.%03lu MHz\n", comparator.name,
+ ((counter_hz + 500) / 1000) / 1000,
+ ((counter_hz + 500) / 1000) % 1000);
+ }
}
-
-device_initcall(init_timer_sysfs);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/lib/io-readsb.S avr32-2.6/arch/avr32/lib/io-readsb.S
--- linux-2.6.25.6/arch/avr32/lib/io-readsb.S 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/lib/io-readsb.S 2008-06-12 15:09:38.719815350 +0200
@@ -41,7 +41,7 @@
2: sub r10, -4
reteq r12
-3: ld.uh r8, r12[0]
+3: ld.ub r8, r12[0]
sub r10, 1
st.b r11++, r8
brne 3b
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/at32ap700x.c avr32-2.6/arch/avr32/mach-at32ap/at32ap700x.c
--- linux-2.6.25.6/arch/avr32/mach-at32ap/at32ap700x.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/mach-at32ap/at32ap700x.c 2008-06-12 15:09:38.723815860 +0200
@@ -6,11 +6,13 @@
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
+#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/spi/spi.h>
+#include <linux/usb/atmel_usba_udc.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -18,6 +20,7 @@
#include <asm/arch/at32ap700x.h>
#include <asm/arch/board.h>
#include <asm/arch/portmux.h>
+#include <asm/arch/sram.h>
#include <video/atmel_lcdc.h>
@@ -91,25 +94,18 @@
static DEFINE_SPINLOCK(pm_lock);
-unsigned long at32ap7000_osc_rates[3] = {
- [0] = 32768,
- /* FIXME: these are ATSTK1002-specific */
- [1] = 20000000,
- [2] = 12000000,
-};
+static struct clk osc0;
+static struct clk osc1;
static unsigned long osc_get_rate(struct clk *clk)
{
- return at32ap7000_osc_rates[clk->index];
+ return at32_board_osc_rates[clk->index];
}
static unsigned long pll_get_rate(struct clk *clk, unsigned long control)
{
unsigned long div, mul, rate;
- if (!(control & PM_BIT(PLLEN)))
- return 0;
-
div = PM_BFEXT(PLLDIV, control) + 1;
mul = PM_BFEXT(PLLMUL, control) + 1;
@@ -120,6 +116,71 @@
return rate;
}
+static long pll_set_rate(struct clk *clk, unsigned long rate,
+ u32 *pll_ctrl)
+{
+ unsigned long mul;
+ unsigned long mul_best_fit = 0;
+ unsigned long div;
+ unsigned long div_min;
+ unsigned long div_max;
+ unsigned long div_best_fit = 0;
+ unsigned long base;
+ unsigned long pll_in;
+ unsigned long actual = 0;
+ unsigned long rate_error;
+ unsigned long rate_error_prev = ~0UL;
+ u32 ctrl;
+
+ /* Rate must be between 80 MHz and 200 Mhz. */
+ if (rate < 80000000UL || rate > 200000000UL)
+ return -EINVAL;
+
+ ctrl = PM_BF(PLLOPT, 4);
+ base = clk->parent->get_rate(clk->parent);
+
+ /* PLL input frequency must be between 6 MHz and 32 MHz. */
+ div_min = DIV_ROUND_UP(base, 32000000UL);
+ div_max = base / 6000000UL;
+
+ if (div_max < div_min)
+ return -EINVAL;
+
+ for (div = div_min; div <= div_max; div++) {
+ pll_in = (base + div / 2) / div;
+ mul = (rate + pll_in / 2) / pll_in;
+
+ if (mul == 0)
+ continue;
+
+ actual = pll_in * mul;
+ rate_error = abs(actual - rate);
+
+ if (rate_error < rate_error_prev) {
+ mul_best_fit = mul;
+ div_best_fit = div;
+ rate_error_prev = rate_error;
+ }
+
+ if (rate_error == 0)
+ break;
+ }
+
+ if (div_best_fit == 0)
+ return -EINVAL;
+
+ ctrl |= PM_BF(PLLMUL, mul_best_fit - 1);
+ ctrl |= PM_BF(PLLDIV, div_best_fit - 1);
+ ctrl |= PM_BF(PLLCOUNT, 16);
+
+ if (clk->parent == &osc1)
+ ctrl |= PM_BIT(PLLOSC);
+
+ *pll_ctrl = ctrl;
+
+ return actual;
+}
+
static unsigned long pll0_get_rate(struct clk *clk)
{
u32 control;
@@ -129,6 +190,41 @@
return pll_get_rate(clk, control);
}
+static void pll1_mode(struct clk *clk, int enabled)
+{
+ unsigned long timeout;
+ u32 status;
+ u32 ctrl;
+
+ ctrl = pm_readl(PLL1);
+
+ if (enabled) {
+ if (!PM_BFEXT(PLLMUL, ctrl) && !PM_BFEXT(PLLDIV, ctrl)) {
+ pr_debug("clk %s: failed to enable, rate not set\n",
+ clk->name);
+ return;
+ }
+
+ ctrl |= PM_BIT(PLLEN);
+ pm_writel(PLL1, ctrl);
+
+ /* Wait for PLL lock. */
+ for (timeout = 10000; timeout; timeout--) {
+ status = pm_readl(ISR);
+ if (status & PM_BIT(LOCK1))
+ break;
+ udelay(10);
+ }
+
+ if (!(status & PM_BIT(LOCK1)))
+ printk(KERN_ERR "clk %s: timeout waiting for lock\n",
+ clk->name);
+ } else {
+ ctrl &= ~PM_BIT(PLLEN);
+ pm_writel(PLL1, ctrl);
+ }
+}
+
static unsigned long pll1_get_rate(struct clk *clk)
{
u32 control;
@@ -138,6 +234,49 @@
return pll_get_rate(clk, control);
}
+static long pll1_set_rate(struct clk *clk, unsigned long rate, int apply)
+{
+ u32 ctrl = 0;
+ unsigned long actual_rate;
+
+ actual_rate = pll_set_rate(clk, rate, &ctrl);
+
+ if (apply) {
+ if (actual_rate != rate)
+ return -EINVAL;
+ if (clk->users > 0)
+ return -EBUSY;
+ pr_debug(KERN_INFO "clk %s: new rate %lu (actual rate %lu)\n",
+ clk->name, rate, actual_rate);
+ pm_writel(PLL1, ctrl);
+ }
+
+ return actual_rate;
+}
+
+static int pll1_set_parent(struct clk *clk, struct clk *parent)
+{
+ u32 ctrl;
+
+ if (clk->users > 0)
+ return -EBUSY;
+
+ ctrl = pm_readl(PLL1);
+ WARN_ON(ctrl & PM_BIT(PLLEN));
+
+ if (parent == &osc0)
+ ctrl &= ~PM_BIT(PLLOSC);
+ else if (parent == &osc1)
+ ctrl |= PM_BIT(PLLOSC);
+ else
+ return -EINVAL;
+
+ pm_writel(PLL1, ctrl);
+ clk->parent = parent;
+
+ return 0;
+}
+
/*
* The AT32AP7000 has five primary clock sources: One 32kHz
* oscillator, two crystal oscillators and two PLLs.
@@ -166,7 +305,10 @@
};
static struct clk pll1 = {
.name = "pll1",
+ .mode = pll1_mode,
.get_rate = pll1_get_rate,
+ .set_rate = pll1_set_rate,
+ .set_parent = pll1_set_parent,
.parent = &osc0,
};
@@ -534,6 +676,14 @@
.users = 1,
.index = 3,
};
+static struct clk sdramc_clk = {
+ .name = "sdramc_clk",
+ .parent = &pbb_clk,
+ .mode = pbb_clk_mode,
+ .get_rate = pbb_clk_get_rate,
+ .users = 1,
+ .index = 14,
+};
static struct resource smc0_resource[] = {
PBMEM(0xfff03400),
@@ -605,19 +755,32 @@
}
/* --------------------------------------------------------------------
- * System Timer/Counter (TC)
+ * Timer/Counter (TC)
* -------------------------------------------------------------------- */
-static struct resource at32_systc0_resource[] = {
+
+static struct resource at32_tcb0_resource[] = {
PBMEM(0xfff00c00),
IRQ(22),
};
-struct platform_device at32_systc0_device = {
- .name = "systc",
+static struct platform_device at32_tcb0_device = {
+ .name = "atmel_tcb",
.id = 0,
- .resource = at32_systc0_resource,
- .num_resources = ARRAY_SIZE(at32_systc0_resource),
+ .resource = at32_tcb0_resource,
+ .num_resources = ARRAY_SIZE(at32_tcb0_resource),
};
-DEV_CLK(pclk, at32_systc0, pbb, 3);
+DEV_CLK(t0_clk, at32_tcb0, pbb, 3);
+
+static struct resource at32_tcb1_resource[] = {
+ PBMEM(0xfff01000),
+ IRQ(23),
+};
+static struct platform_device at32_tcb1_device = {
+ .name = "atmel_tcb",
+ .id = 1,
+ .resource = at32_tcb1_resource,
+ .num_resources = ARRAY_SIZE(at32_tcb1_resource),
+};
+DEV_CLK(t0_clk, at32_tcb1, pbb, 4);
/* --------------------------------------------------------------------
* PIO
@@ -669,7 +832,8 @@
platform_device_register(&pdc_device);
platform_device_register(&dmaca0_device);
- platform_device_register(&at32_systc0_device);
+ platform_device_register(&at32_tcb0_device);
+ platform_device_register(&at32_tcb1_device);
platform_device_register(&pio0_device);
platform_device_register(&pio1_device);
@@ -679,6 +843,81 @@
}
/* --------------------------------------------------------------------
+ * PSIF
+ * -------------------------------------------------------------------- */
+static struct resource atmel_psif0_resource[] __initdata = {
+ {
+ .start = 0xffe03c00,
+ .end = 0xffe03cff,
+ .flags = IORESOURCE_MEM,
+ },
+ IRQ(18),
+};
+static struct clk atmel_psif0_pclk = {
+ .name = "pclk",
+ .parent = &pba_clk,
+ .mode = pba_clk_mode,
+ .get_rate = pba_clk_get_rate,
+ .index = 15,
+};
+
+static struct resource atmel_psif1_resource[] __initdata = {
+ {
+ .start = 0xffe03d00,
+ .end = 0xffe03dff,
+ .flags = IORESOURCE_MEM,
+ },
+ IRQ(18),
+};
+static struct clk atmel_psif1_pclk = {
+ .name = "pclk",
+ .parent = &pba_clk,
+ .mode = pba_clk_mode,
+ .get_rate = pba_clk_get_rate,
+ .index = 15,
+};
+
+struct platform_device *__init at32_add_device_psif(unsigned int id)
+{
+ struct platform_device *pdev;
+
+ if (!(id == 0 || id == 1))
+ return NULL;
+
+ pdev = platform_device_alloc("atmel_psif", id);
+ if (!pdev)
+ return NULL;
+
+ switch (id) {
+ case 0:
+ if (platform_device_add_resources(pdev, atmel_psif0_resource,
+ ARRAY_SIZE(atmel_psif0_resource)))
+ goto err_add_resources;
+ atmel_psif0_pclk.dev = &pdev->dev;
+ select_peripheral(PA(8), PERIPH_A, 0); /* CLOCK */
+ select_peripheral(PA(9), PERIPH_A, 0); /* DATA */
+ break;
+ case 1:
+ if (platform_device_add_resources(pdev, atmel_psif1_resource,
+ ARRAY_SIZE(atmel_psif1_resource)))
+ goto err_add_resources;
+ atmel_psif1_pclk.dev = &pdev->dev;
+ select_peripheral(PB(11), PERIPH_A, 0); /* CLOCK */
+ select_peripheral(PB(12), PERIPH_A, 0); /* DATA */
+ break;
+ default:
+ return NULL;
+ }
+
+ platform_device_add(pdev);
+ return pdev;
+
+err_add_resources:
+ platform_device_put(pdev);
+ return NULL;
+}
+
+/* --------------------------------------------------------------------
* USART
* -------------------------------------------------------------------- */
@@ -989,7 +1228,9 @@
.index = 2,
};
-struct platform_device *__init at32_add_device_twi(unsigned int id)
+struct platform_device *__init at32_add_device_twi(unsigned int id,
+ struct i2c_board_info *b,
+ unsigned int n)
{
struct platform_device *pdev;
@@ -1009,6 +1250,9 @@
atmel_twi0_pclk.dev = &pdev->dev;
+ if (b)
+ i2c_register_board_info(id, b, n);
+
platform_device_add(pdev);
return pdev;
@@ -1032,7 +1276,8 @@
.index = 9,
};
-struct platform_device *__init at32_add_device_mci(unsigned int id)
+struct platform_device *__init
+at32_add_device_mci(unsigned int id, struct mci_platform_data *data)
{
struct platform_device *pdev;
@@ -1041,11 +1286,15 @@
pdev = platform_device_alloc("atmel_mci", id);
if (!pdev)
- return NULL;
+ goto fail;
if (platform_device_add_resources(pdev, atmel_mci0_resource,
ARRAY_SIZE(atmel_mci0_resource)))
- goto err_add_resources;
+ goto fail;
+
+ if (data && platform_device_add_data(pdev, data,
+ sizeof(struct mci_platform_data)))
+ goto fail;
select_peripheral(PA(10), PERIPH_A, 0); /* CLK */
select_peripheral(PA(11), PERIPH_A, 0); /* CMD */
@@ -1054,12 +1303,19 @@
select_peripheral(PA(14), PERIPH_A, 0); /* DATA2 */
select_peripheral(PA(15), PERIPH_A, 0); /* DATA3 */
+ if (data) {
+ if (data->detect_pin != GPIO_PIN_NONE)
+ at32_select_gpio(data->detect_pin, 0);
+ if (data->wp_pin != GPIO_PIN_NONE)
+ at32_select_gpio(data->wp_pin, 0);
+ }
+
atmel_mci0_pclk.dev = &pdev->dev;
platform_device_add(pdev);
return pdev;
-err_add_resources:
+fail:
platform_device_put(pdev);
return NULL;
}
@@ -1097,7 +1353,8 @@
struct platform_device *__init
at32_add_device_lcdc(unsigned int id, struct atmel_lcdfb_info *data,
- unsigned long fbmem_start, unsigned long fbmem_len)
+ unsigned long fbmem_start, unsigned long fbmem_len,
+ unsigned int pin_config)
{
struct platform_device *pdev;
struct atmel_lcdfb_info *info;
@@ -1124,37 +1381,77 @@
switch (id) {
case 0:
pdev = &atmel_lcdfb0_device;
- select_peripheral(PC(19), PERIPH_A, 0); /* CC */
- select_peripheral(PC(20), PERIPH_A, 0); /* HSYNC */
- select_peripheral(PC(21), PERIPH_A, 0); /* PCLK */
- select_peripheral(PC(22), PERIPH_A, 0); /* VSYNC */
- select_peripheral(PC(23), PERIPH_A, 0); /* DVAL */
- select_peripheral(PC(24), PERIPH_A, 0); /* MODE */
- select_peripheral(PC(25), PERIPH_A, 0); /* PWR */
- select_peripheral(PC(26), PERIPH_A, 0); /* DATA0 */
- select_peripheral(PC(27), PERIPH_A, 0); /* DATA1 */
- select_peripheral(PC(28), PERIPH_A, 0); /* DATA2 */
- select_peripheral(PC(29), PERIPH_A, 0); /* DATA3 */
- select_peripheral(PC(30), PERIPH_A, 0); /* DATA4 */
- select_peripheral(PC(31), PERIPH_A, 0); /* DATA5 */
- select_peripheral(PD(0), PERIPH_A, 0); /* DATA6 */
- select_peripheral(PD(1), PERIPH_A, 0); /* DATA7 */
- select_peripheral(PD(2), PERIPH_A, 0); /* DATA8 */
- select_peripheral(PD(3), PERIPH_A, 0); /* DATA9 */
- select_peripheral(PD(4), PERIPH_A, 0); /* DATA10 */
- select_peripheral(PD(5), PERIPH_A, 0); /* DATA11 */
- select_peripheral(PD(6), PERIPH_A, 0); /* DATA12 */
- select_peripheral(PD(7), PERIPH_A, 0); /* DATA13 */
- select_peripheral(PD(8), PERIPH_A, 0); /* DATA14 */
- select_peripheral(PD(9), PERIPH_A, 0); /* DATA15 */
- select_peripheral(PD(10), PERIPH_A, 0); /* DATA16 */
- select_peripheral(PD(11), PERIPH_A, 0); /* DATA17 */
- select_peripheral(PD(12), PERIPH_A, 0); /* DATA18 */
- select_peripheral(PD(13), PERIPH_A, 0); /* DATA19 */
- select_peripheral(PD(14), PERIPH_A, 0); /* DATA20 */
- select_peripheral(PD(15), PERIPH_A, 0); /* DATA21 */
- select_peripheral(PD(16), PERIPH_A, 0); /* DATA22 */
- select_peripheral(PD(17), PERIPH_A, 0); /* DATA23 */
+
+ switch (pin_config) {
+ case 0:
+ select_peripheral(PC(19), PERIPH_A, 0); /* CC */
+ select_peripheral(PC(20), PERIPH_A, 0); /* HSYNC */
+ select_peripheral(PC(21), PERIPH_A, 0); /* PCLK */
+ select_peripheral(PC(22), PERIPH_A, 0); /* VSYNC */
+ select_peripheral(PC(23), PERIPH_A, 0); /* DVAL */
+ select_peripheral(PC(24), PERIPH_A, 0); /* MODE */
+ select_peripheral(PC(25), PERIPH_A, 0); /* PWR */
+ select_peripheral(PC(26), PERIPH_A, 0); /* DATA0 */
+ select_peripheral(PC(27), PERIPH_A, 0); /* DATA1 */
+ select_peripheral(PC(28), PERIPH_A, 0); /* DATA2 */
+ select_peripheral(PC(29), PERIPH_A, 0); /* DATA3 */
+ select_peripheral(PC(30), PERIPH_A, 0); /* DATA4 */
+ select_peripheral(PC(31), PERIPH_A, 0); /* DATA5 */
+ select_peripheral(PD(0), PERIPH_A, 0); /* DATA6 */
+ select_peripheral(PD(1), PERIPH_A, 0); /* DATA7 */
+ select_peripheral(PD(2), PERIPH_A, 0); /* DATA8 */
+ select_peripheral(PD(3), PERIPH_A, 0); /* DATA9 */
+ select_peripheral(PD(4), PERIPH_A, 0); /* DATA10 */
+ select_peripheral(PD(5), PERIPH_A, 0); /* DATA11 */
+ select_peripheral(PD(6), PERIPH_A, 0); /* DATA12 */
+ select_peripheral(PD(7), PERIPH_A, 0); /* DATA13 */
+ select_peripheral(PD(8), PERIPH_A, 0); /* DATA14 */
+ select_peripheral(PD(9), PERIPH_A, 0); /* DATA15 */
+ select_peripheral(PD(10), PERIPH_A, 0); /* DATA16 */
+ select_peripheral(PD(11), PERIPH_A, 0); /* DATA17 */
+ select_peripheral(PD(12), PERIPH_A, 0); /* DATA18 */
+ select_peripheral(PD(13), PERIPH_A, 0); /* DATA19 */
+ select_peripheral(PD(14), PERIPH_A, 0); /* DATA20 */
+ select_peripheral(PD(15), PERIPH_A, 0); /* DATA21 */
+ select_peripheral(PD(16), PERIPH_A, 0); /* DATA22 */
+ select_peripheral(PD(17), PERIPH_A, 0); /* DATA23 */
+ break;
+ case 1:
+ select_peripheral(PE(0), PERIPH_B, 0); /* CC */
+ select_peripheral(PC(20), PERIPH_A, 0); /* HSYNC */
+ select_peripheral(PC(21), PERIPH_A, 0); /* PCLK */
+ select_peripheral(PC(22), PERIPH_A, 0); /* VSYNC */
+ select_peripheral(PE(1), PERIPH_B, 0); /* DVAL */
+ select_peripheral(PE(2), PERIPH_B, 0); /* MODE */
+ select_peripheral(PC(25), PERIPH_A, 0); /* PWR */
+ select_peripheral(PE(3), PERIPH_B, 0); /* DATA0 */
+ select_peripheral(PE(4), PERIPH_B, 0); /* DATA1 */
+ select_peripheral(PE(5), PERIPH_B, 0); /* DATA2 */
+ select_peripheral(PE(6), PERIPH_B, 0); /* DATA3 */
+ select_peripheral(PE(7), PERIPH_B, 0); /* DATA4 */
+ select_peripheral(PC(31), PERIPH_A, 0); /* DATA5 */
+ select_peripheral(PD(0), PERIPH_A, 0); /* DATA6 */
+ select_peripheral(PD(1), PERIPH_A, 0); /* DATA7 */
+ select_peripheral(PE(8), PERIPH_B, 0); /* DATA8 */
+ select_peripheral(PE(9), PERIPH_B, 0); /* DATA9 */
+ select_peripheral(PE(10), PERIPH_B, 0); /* DATA10 */
+ select_peripheral(PE(11), PERIPH_B, 0); /* DATA11 */
+ select_peripheral(PE(12), PERIPH_B, 0); /* DATA12 */
+ select_peripheral(PD(7), PERIPH_A, 0); /* DATA13 */
+ select_peripheral(PD(8), PERIPH_A, 0); /* DATA14 */
+ select_peripheral(PD(9), PERIPH_A, 0); /* DATA15 */
+ select_peripheral(PE(13), PERIPH_B, 0); /* DATA16 */
+ select_peripheral(PE(14), PERIPH_B, 0); /* DATA17 */
+ select_peripheral(PE(15), PERIPH_B, 0); /* DATA18 */
+ select_peripheral(PE(16), PERIPH_B, 0); /* DATA19 */
+ select_peripheral(PE(17), PERIPH_B, 0); /* DATA20 */
+ select_peripheral(PE(18), PERIPH_B, 0); /* DATA21 */
+ select_peripheral(PD(16), PERIPH_A, 0); /* DATA22 */
+ select_peripheral(PD(17), PERIPH_A, 0); /* DATA23 */
+ break;
+ default:
+ goto err_invalid_id;
+ }
clk_set_parent(&atmel_lcdfb0_pixclk, &pll0);
clk_set_rate(&atmel_lcdfb0_pixclk, clk_get_rate(&pll0));
@@ -1351,9 +1648,39 @@
.index = 6,
};
+#define EP(nam, idx, maxpkt, maxbk, dma, isoc) \
+ [idx] = { \
+ .name = nam, \
+ .index = idx, \
+ .fifo_size = maxpkt, \
+ .nr_banks = maxbk, \
+ .can_dma = dma, \
+ .can_isoc = isoc, \
+ }
+
+static struct usba_ep_data at32_usba_ep[] __initdata = {
+ EP("ep0", 0, 64, 1, 0, 0),
+ EP("ep1", 1, 512, 2, 1, 1),
+ EP("ep2", 2, 512, 2, 1, 1),
+ EP("ep3-int", 3, 64, 3, 1, 0),
+ EP("ep4-int", 4, 64, 3, 1, 0),
+ EP("ep5", 5, 1024, 3, 1, 1),
+ EP("ep6", 6, 1024, 3, 1, 1),
+};
+
+#undef EP
+
struct platform_device *__init
at32_add_device_usba(unsigned int id, struct usba_platform_data *data)
{
+ /*
+ * pdata doesn't have room for any endpoints, so we need to
+ * append room for the ones we need right after it.
+ */
+ struct {
+ struct usba_platform_data pdata;
+ struct usba_ep_data ep[7];
+ } usba_data;
struct platform_device *pdev;
if (id != 0)
@@ -1367,13 +1694,20 @@
ARRAY_SIZE(usba0_resource)))
goto out_free_pdev;
- if (data) {
- if (platform_device_add_data(pdev, data, sizeof(*data)))
- goto out_free_pdev;
+ if (data)
+ usba_data.pdata.vbus_pin = data->vbus_pin;
+ else
+ usba_data.pdata.vbus_pin = -EINVAL;
- if (data->vbus_pin != GPIO_PIN_NONE)
- at32_select_gpio(data->vbus_pin, 0);
- }
+ data = &usba_data.pdata;
+ data->num_ep = ARRAY_SIZE(at32_usba_ep);
+ memcpy(data->ep, at32_usba_ep, sizeof(at32_usba_ep));
+
+ if (platform_device_add_data(pdev, data, sizeof(usba_data)))
+ goto out_free_pdev;
+
+ if (data->vbus_pin >= 0)
+ at32_select_gpio(data->vbus_pin, 0);
usba0_pclk.dev = &pdev->dev;
usba0_hclk.dev = &pdev->dev;
@@ -1526,6 +1860,58 @@
#endif
/* --------------------------------------------------------------------
+ * NAND Flash / SmartMedia
+ * -------------------------------------------------------------------- */
+static struct resource smc_cs3_resource[] __initdata = {
+ {
+ .start = 0x0c000000,
+ .end = 0x0fffffff,
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = 0xfff03c00,
+ .end = 0xfff03fff,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+struct platform_device *__init
+at32_add_device_nand(unsigned int id, struct atmel_nand_data *data)
+{
+ struct platform_device *pdev;
+
+ if (id != 0 || !data)
+ return NULL;
+
+ pdev = platform_device_alloc("atmel_nand", id);
+ if (!pdev)
+ goto fail;
+
+ if (platform_device_add_resources(pdev, smc_cs3_resource,
+ ARRAY_SIZE(smc_cs3_resource)))
+ goto fail;
+
+ if (platform_device_add_data(pdev, data,
+ sizeof(struct atmel_nand_data)))
+ goto fail;
+
+ set_ebi_sfr_bits(HMATRIX_BIT(CS3A));
+ if (data->enable_pin)
+ at32_select_gpio(data->enable_pin,
+ AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+ if (data->rdy_pin)
+ at32_select_gpio(data->rdy_pin, 0);
+ if (data->det_pin)
+ at32_select_gpio(data->det_pin, 0);
+
+ platform_device_add(pdev);
+ return pdev;
+
+fail:
+ platform_device_put(pdev);
+ return NULL;
+}
+
+/* --------------------------------------------------------------------
* AC97C
* -------------------------------------------------------------------- */
static struct resource atmel_ac97c0_resource[] __initdata = {
@@ -1683,6 +2069,7 @@
&hmatrix_clk,
&ebi_clk,
&hramc_clk,
+ &sdramc_clk,
&smc0_pclk,
&smc0_mck,
&pdc_hclk,
@@ -1694,7 +2081,10 @@
&pio2_mck,
&pio3_mck,
&pio4_mck,
- &at32_systc0_pclk,
+ &at32_tcb0_t0_clk,
+ &at32_tcb1_t0_clk,
+ &atmel_psif0_pclk,
+ &atmel_psif1_pclk,
&atmel_usart0_usart,
&atmel_usart1_usart,
&atmel_usart2_usart,
@@ -1730,16 +2120,7 @@
};
unsigned int at32_nr_clocks = ARRAY_SIZE(at32_clock_list);
-void __init at32_portmux_init(void)
-{
- at32_init_pio(&pio0_device);
- at32_init_pio(&pio1_device);
- at32_init_pio(&pio2_device);
- at32_init_pio(&pio3_device);
- at32_init_pio(&pio4_device);
-}
-
-void __init at32_clock_init(void)
+void __init setup_platform(void)
{
u32 cpu_mask = 0, hsb_mask = 0, pba_mask = 0, pbb_mask = 0;
int i;
@@ -1794,4 +2175,36 @@
pm_writel(HSB_MASK, hsb_mask);
pm_writel(PBA_MASK, pba_mask);
pm_writel(PBB_MASK, pbb_mask);
+
+ /* Initialize the port muxes */
+ at32_init_pio(&pio0_device);
+ at32_init_pio(&pio1_device);
+ at32_init_pio(&pio2_device);
+ at32_init_pio(&pio3_device);
+ at32_init_pio(&pio4_device);
+}
+
+struct gen_pool *sram_pool;
+
+static int __init sram_init(void)
+{
+ struct gen_pool *pool;
+
+ /* 1KiB granularity */
+ pool = gen_pool_create(10, -1);
+ if (!pool)
+ goto fail;
+
+ if (gen_pool_add(pool, 0x24000000, 0x8000, -1))
+ goto err_pool_add;
+
+ sram_pool = pool;
+ return 0;
+
+err_pool_add:
+ gen_pool_destroy(pool);
+fail:
+ pr_err("Failed to create SRAM pool\n");
+ return -ENOMEM;
}
+core_initcall(sram_init);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/at32ap.c avr32-2.6/arch/avr32/mach-at32ap/at32ap.c
--- linux-2.6.25.6/arch/avr32/mach-at32ap/at32ap.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/mach-at32ap/at32ap.c 1970-01-01 01:00:00.000000000 +0100
@@ -1,56 +0,0 @@
-/*
- * Copyright (C) 2006 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-
-#include <asm/arch/init.h>
-
-void __init setup_platform(void)
-{
- at32_clock_init();
- at32_portmux_init();
-}
-
-static int __init pdc_probe(struct platform_device *pdev)
-{
- struct clk *pclk, *hclk;
-
- pclk = clk_get(&pdev->dev, "pclk");
- if (IS_ERR(pclk)) {
- dev_err(&pdev->dev, "no pclk defined\n");
- return PTR_ERR(pclk);
- }
- hclk = clk_get(&pdev->dev, "hclk");
- if (IS_ERR(hclk)) {
- dev_err(&pdev->dev, "no hclk defined\n");
- clk_put(pclk);
- return PTR_ERR(hclk);
- }
-
- clk_enable(pclk);
- clk_enable(hclk);
-
- dev_info(&pdev->dev, "Atmel Peripheral DMA Controller enabled\n");
- return 0;
-}
-
-static struct platform_driver pdc_driver = {
- .probe = pdc_probe,
- .driver = {
- .name = "pdc",
- },
-};
-
-static int __init pdc_init(void)
-{
- return platform_driver_register(&pdc_driver);
-}
-arch_initcall(pdc_init);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/cpufreq.c avr32-2.6/arch/avr32/mach-at32ap/cpufreq.c
--- linux-2.6.25.6/arch/avr32/mach-at32ap/cpufreq.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/mach-at32ap/cpufreq.c 2008-06-12 15:03:55.891816030 +0200
@@ -108,5 +108,4 @@
{
return cpufreq_register_driver(&at32_driver);
}
-
-arch_initcall(at32_cpufreq_init);
+late_initcall(at32_cpufreq_init);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/gpio-dev.c avr32-2.6/arch/avr32/mach-at32ap/gpio-dev.c
--- linux-2.6.25.6/arch/avr32/mach-at32ap/gpio-dev.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/mach-at32ap/gpio-dev.c 2008-06-12 15:09:38.723815860 +0200
@@ -0,0 +1,573 @@
+/*
+ * GPIO /dev and configfs interface
+ *
+ * Copyright (C) 2006-2007 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/configfs.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/poll.h>
+#include <linux/uaccess.h>
+#include <linux/wait.h>
+
+#include <asm/gpio.h>
+#include <asm/arch/portmux.h>
+
+#define GPIO_DEV_MAX 8
+
+static struct class *gpio_dev_class;
+static dev_t gpio_devt;
+
+struct gpio_item {
+ spinlock_t lock;
+
+ int enabled;
+ int initialized;
+ int port;
+ u32 pin_mask;
+ u32 oe_mask;
+
+ /* Pin state last time we read it (for blocking reads) */
+ u32 pin_state;
+ int changed;
+
+ wait_queue_head_t change_wq;
+ struct fasync_struct *async_queue;
+
+ int id;
+ struct class_device *gpio_dev;
+ struct cdev char_dev;
+ struct config_item item;
+};
+
+struct gpio_attribute {
+ struct configfs_attribute attr;
+ ssize_t (*show)(struct gpio_item *, char *);
+ ssize_t (*store)(struct gpio_item *, const char *, size_t);
+};
+
+static irqreturn_t gpio_dev_interrupt(int irq, void *dev_id)
+{
+ struct gpio_item *gpio = dev_id;
+ u32 old_state, new_state;
+
+ old_state = gpio->pin_state;
+ new_state = at32_gpio_get_value_multiple(gpio->port, gpio->pin_mask);
+ gpio->pin_state = new_state;
+
+ if (new_state != old_state) {
+ gpio->changed = 1;
+ wake_up_interruptible(&gpio->change_wq);
+
+ if (gpio->async_queue)
+ kill_fasync(&gpio->async_queue, SIGIO, POLL_IN);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int gpio_dev_open(struct inode *inode, struct file *file)
+{
+ struct gpio_item *gpio = container_of(inode->i_cdev,
+ struct gpio_item,
+ char_dev);
+ unsigned int irq;
+ unsigned int i;
+ int ret;
+
+ nonseekable_open(inode, file);
+ config_item_get(&gpio->item);
+ file->private_data = gpio;
+
+ gpio->pin_state = at32_gpio_get_value_multiple(gpio->port,
+ gpio->pin_mask);
+ gpio->changed = 1;
+
+ for (i = 0; i < 32; i++) {
+ if (gpio->pin_mask & (1 << i)) {
+ irq = gpio_to_irq(32 * gpio->port + i);
+ ret = request_irq(irq, gpio_dev_interrupt, 0,
+ "gpio-dev", gpio);
+ if (ret)
+ goto err_irq;
+ }
+ }
+
+ return 0;
+
+err_irq:
+ while (i--) {
+ if (gpio->pin_mask & (1 << i)) {
+ irq = gpio_to_irq(32 * gpio->port + i);
+ free_irq(irq, gpio);
+ }
+ }
+
+ config_item_put(&gpio->item);
+
+ return ret;
+}
+
+static int gpio_dev_fasync(int fd, struct file *file, int mode)
+{
+ struct gpio_item *gpio = file->private_data;
+
+ return fasync_helper(fd, file, mode, &gpio->async_queue);
+}
+
+static int gpio_dev_release(struct inode *inode, struct file *file)
+{
+ struct gpio_item *gpio = file->private_data;
+ unsigned int irq;
+ unsigned int i;
+
+ gpio_dev_fasync(-1, file, 0);
+
+ for (i = 0; i < 32; i++) {
+ if (gpio->pin_mask & (1 << i)) {
+ irq = gpio_to_irq(32 * gpio->port + i);
+ free_irq(irq, gpio);
+ }
+ }
+
+ config_item_put(&gpio->item);
+
+ return 0;
+}
+
+static unsigned int gpio_dev_poll(struct file *file, poll_table *wait)
+{
+ struct gpio_item *gpio = file->private_data;
+ unsigned int mask = 0;
+
+ poll_wait(file, &gpio->change_wq, wait);
+ if (gpio->changed)
+ mask |= POLLIN | POLLRDNORM;
+
+ return mask;
+}
+
+static ssize_t gpio_dev_read(struct file *file, char __user *buf,
+ size_t count, loff_t *offset)
+{
+ struct gpio_item *gpio = file->private_data;
+ u32 value;
+
+ spin_lock_irq(&gpio->lock);
+ while (!gpio->changed) {
+ spin_unlock_irq(&gpio->lock);
+
+ if (file->f_flags & O_NONBLOCK)
+ return -EAGAIN;
+
+ if (wait_event_interruptible(gpio->change_wq, gpio->changed))
+ return -ERESTARTSYS;
+
+ spin_lock_irq(&gpio->lock);
+ }
+
+ gpio->changed = 0;
+ value = at32_gpio_get_value_multiple(gpio->port, gpio->pin_mask);
+
+ spin_unlock_irq(&gpio->lock);
+
+ count = min(count, (size_t)4);
+ if (copy_to_user(buf, &value, count))
+ return -EFAULT;
+
+ return count;
+}
+
+static ssize_t gpio_dev_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *offset)
+{
+ struct gpio_item *gpio = file->private_data;
+ u32 value = 0;
+ u32 mask = ~0UL;
+
+ count = min(count, (size_t)4);
+ if (copy_from_user(&value, buf, count))
+ return -EFAULT;
+
+ /* Assuming big endian */
+ mask <<= (4 - count) * 8;
+ mask &= gpio->pin_mask;
+
+ at32_gpio_set_value_multiple(gpio->port, value, mask);
+
+ return count;
+}
+
+static struct file_operations gpio_dev_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .open = gpio_dev_open,
+ .release = gpio_dev_release,
+ .fasync = gpio_dev_fasync,
+ .poll = gpio_dev_poll,
+ .read = gpio_dev_read,
+ .write = gpio_dev_write,
+};
+
+static struct gpio_item *to_gpio_item(struct config_item *item)
+{
+ return item ? container_of(item, struct gpio_item, item) : NULL;
+}
+
+static ssize_t gpio_show_gpio_id(struct gpio_item *gpio, char *page)
+{
+ return sprintf(page, "%d\n", gpio->port);
+}
+
+static ssize_t gpio_store_gpio_id(struct gpio_item *gpio,
+ const char *page, size_t count)
+{
+ unsigned long id;
+ char *p = (char *)page;
+ ssize_t ret = -EINVAL;
+
+ id = simple_strtoul(p, &p, 0);
+ if (!p || (*p && (*p != '\n')))
+ return -EINVAL;
+
+ /* Switching PIO is not allowed when live... */
+ spin_lock(&gpio->lock);
+ if (!gpio->enabled) {
+ ret = -ENXIO;
+ if (at32_gpio_port_is_valid(id)) {
+ gpio->port = id;
+ ret = count;
+ }
+ }
+ spin_unlock(&gpio->lock);
+
+ return ret;
+}
+
+static ssize_t gpio_show_pin_mask(struct gpio_item *gpio, char *page)
+{
+ return sprintf(page, "0x%08x\n", gpio->pin_mask);
+}
+
+static ssize_t gpio_store_pin_mask(struct gpio_item *gpio,
+ const char *page, size_t count)
+{
+ u32 new_mask;
+ char *p = (char *)page;
+ ssize_t ret = -EINVAL;
+
+ new_mask = simple_strtoul(p, &p, 0);
+ if (!p || (*p && (*p != '\n')))
+ return -EINVAL;
+
+ /* Can't update the pin mask while live. */
+ spin_lock(&gpio->lock);
+ if (!gpio->enabled) {
+ gpio->oe_mask &= new_mask;
+ gpio->pin_mask = new_mask;
+ ret = count;
+ }
+ spin_unlock(&gpio->lock);
+
+ return ret;
+}
+
+static ssize_t gpio_show_oe_mask(struct gpio_item *gpio, char *page)
+{
+ return sprintf(page, "0x%08x\n", gpio->oe_mask);
+}
+
+static ssize_t gpio_store_oe_mask(struct gpio_item *gpio,
+ const char *page, size_t count)
+{
+ u32 mask;
+ char *p = (char *)page;
+ ssize_t ret = -EINVAL;
+
+ mask = simple_strtoul(p, &p, 0);
+ if (!p || (*p && (*p != '\n')))
+ return -EINVAL;
+
+ spin_lock(&gpio->lock);
+ if (!gpio->enabled) {
+ gpio->oe_mask = mask & gpio->pin_mask;
+ ret = count;
+ }
+ spin_unlock(&gpio->lock);
+
+ return ret;
+}
+
+static ssize_t gpio_show_enabled(struct gpio_item *gpio, char *page)
+{
+ return sprintf(page, "%d\n", gpio->enabled);
+}
+
+static ssize_t gpio_store_enabled(struct gpio_item *gpio,
+ const char *page, size_t count)
+{
+ char *p = (char *)page;
+ int enabled;
+ int ret;
+
+ enabled = simple_strtoul(p, &p, 0);
+ if (!p || (*p && (*p != '\n')))
+ return -EINVAL;
+
+ /* make it a boolean value */
+ enabled = !!enabled;
+
+ if (gpio->enabled == enabled)
+ /* No change; do nothing. */
+ return count;
+
+ BUG_ON(gpio->id >= GPIO_DEV_MAX);
+
+ if (!enabled) {
+ class_device_unregister(gpio->gpio_dev);
+ cdev_del(&gpio->char_dev);
+ at32_deselect_pins(gpio->port, gpio->pin_mask);
+ gpio->initialized = 0;
+ } else {
+ if (gpio->port < 0 || !gpio->pin_mask)
+ return -ENODEV;
+ }
+
+ /* Disallow any updates to gpio_id or pin_mask */
+ spin_lock(&gpio->lock);
+ gpio->enabled = enabled;
+ spin_unlock(&gpio->lock);
+
+ if (!enabled)
+ return count;
+
+ /* Now, try to allocate the pins */
+ ret = at32_select_gpio_pins(gpio->port, gpio->pin_mask, gpio->oe_mask);
+ if (ret)
+ goto err_alloc_pins;
+
+ gpio->initialized = 1;
+
+ cdev_init(&gpio->char_dev, &gpio_dev_fops);
+ gpio->char_dev.owner = THIS_MODULE;
+ ret = cdev_add(&gpio->char_dev, MKDEV(MAJOR(gpio_devt), gpio->id), 1);
+ if (ret < 0)
+ goto err_cdev_add;
+ gpio->gpio_dev = class_device_create(gpio_dev_class, NULL,
+ MKDEV(MAJOR(gpio_devt), gpio->id),
+ NULL,
+ "gpio%d", gpio->id);
+ if (IS_ERR(gpio->gpio_dev)) {
+ printk(KERN_ERR "failed to create gpio%d\n", gpio->id);
+ ret = PTR_ERR(gpio->gpio_dev);
+ goto err_class_dev;
+ }
+
+ printk(KERN_INFO "created gpio%d (port%d/0x%08x) as (%d:%d)\n",
+ gpio->id, gpio->port, gpio->pin_mask,
+ MAJOR(gpio->gpio_dev->devt), MINOR(gpio->gpio_dev->devt));
+
+ return 0;
+
+err_class_dev:
+ cdev_del(&gpio->char_dev);
+err_cdev_add:
+ at32_deselect_pins(gpio->port, gpio->pin_mask);
+ gpio->initialized = 0;
+err_alloc_pins:
+ spin_lock(&gpio->lock);
+ gpio->enabled = 0;
+ spin_unlock(&gpio->lock);
+
+ return ret;
+}
+
+static struct gpio_attribute gpio_item_attr_gpio_id = {
+ .attr = {
+ .ca_owner = THIS_MODULE,
+ .ca_name = "gpio_id",
+ .ca_mode = S_IRUGO | S_IWUSR,
+ },
+ .show = gpio_show_gpio_id,
+ .store = gpio_store_gpio_id,
+};
+static struct gpio_attribute gpio_item_attr_pin_mask = {
+ .attr = {
+ .ca_owner = THIS_MODULE,
+ .ca_name = "pin_mask",
+ .ca_mode = S_IRUGO | S_IWUSR,
+ },
+ .show = gpio_show_pin_mask,
+ .store = gpio_store_pin_mask,
+};
+static struct gpio_attribute gpio_item_attr_oe_mask = {
+ .attr = {
+ .ca_owner = THIS_MODULE,
+ .ca_name = "oe_mask",
+ .ca_mode = S_IRUGO | S_IWUSR,
+ },
+ .show = gpio_show_oe_mask,
+ .store = gpio_store_oe_mask,
+};
+static struct gpio_attribute gpio_item_attr_enabled = {
+ .attr = {
+ .ca_owner = THIS_MODULE,
+ .ca_name = "enabled",
+ .ca_mode = S_IRUGO | S_IWUSR,
+ },
+ .show = gpio_show_enabled,
+ .store = gpio_store_enabled,
+};
+
+static struct configfs_attribute *gpio_item_attrs[] = {
+ &gpio_item_attr_gpio_id.attr,
+ &gpio_item_attr_pin_mask.attr,
+ &gpio_item_attr_oe_mask.attr,
+ &gpio_item_attr_enabled.attr,
+ NULL,
+};
+
+static ssize_t gpio_show_attr(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ struct gpio_item *gpio_item = to_gpio_item(item);
+ struct gpio_attribute *gpio_attr
+ = container_of(attr, struct gpio_attribute, attr);
+ ssize_t ret = 0;
+
+ if (gpio_attr->show)
+ ret = gpio_attr->show(gpio_item, page);
+ return ret;
+}
+
+static ssize_t gpio_store_attr(struct config_item *item,
+ struct configfs_attribute *attr,
+ const char *page, size_t count)
+{
+ struct gpio_item *gpio_item = to_gpio_item(item);
+ struct gpio_attribute *gpio_attr
+ = container_of(attr, struct gpio_attribute, attr);
+ ssize_t ret = -EINVAL;
+
+ if (gpio_attr->store)
+ ret = gpio_attr->store(gpio_item, page, count);
+ return ret;
+}
+
+static void gpio_release(struct config_item *item)
+{
+ kfree(to_gpio_item(item));
+}
+
+static struct configfs_item_operations gpio_item_ops = {
+ .release = gpio_release,
+ .show_attribute = gpio_show_attr,
+ .store_attribute = gpio_store_attr,
+};
+
+static struct config_item_type gpio_item_type = {
+ .ct_item_ops = &gpio_item_ops,
+ .ct_attrs = gpio_item_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item *gpio_make_item(struct config_group *group,
+ const char *name)
+{
+ static int next_id;
+ struct gpio_item *gpio;
+
+ if (next_id >= GPIO_DEV_MAX)
+ return NULL;
+
+ gpio = kzalloc(sizeof(struct gpio_item), GFP_KERNEL);
+ if (!gpio)
+ return NULL;
+
+ gpio->id = next_id++;
+ config_item_init_type_name(&gpio->item, name, &gpio_item_type);
+ spin_lock_init(&gpio->lock);
+ init_waitqueue_head(&gpio->change_wq);
+
+ return &gpio->item;
+}
+
+static void gpio_drop_item(struct config_group *group,
+ struct config_item *item)
+{
+ struct gpio_item *gpio = to_gpio_item(item);
+
+ spin_lock(&gpio->lock);
+ if (gpio->enabled) {
+ class_device_unregister(gpio->gpio_dev);
+ cdev_del(&gpio->char_dev);
+ }
+
+ if (gpio->initialized) {
+ at32_deselect_pins(gpio->port, gpio->pin_mask);
+ gpio->initialized = 0;
+ gpio->enabled = 0;
+ }
+ spin_unlock(&gpio->lock);
+}
+
+static struct configfs_group_operations gpio_group_ops = {
+ .make_item = gpio_make_item,
+ .drop_item = gpio_drop_item,
+};
+
+static struct config_item_type gpio_group_type = {
+ .ct_group_ops = &gpio_group_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct configfs_subsystem gpio_subsys = {
+ .su_group = {
+ .cg_item = {
+ .ci_namebuf = "gpio",
+ .ci_type = &gpio_group_type,
+ },
+ },
+};
+
+static int __init gpio_dev_init(void)
+{
+ int err;
+
+ gpio_dev_class = class_create(THIS_MODULE, "gpio-dev");
+ if (IS_ERR(gpio_dev_class)) {
+ err = PTR_ERR(gpio_dev_class);
+ goto err_class_create;
+ }
+
+ err = alloc_chrdev_region(&gpio_devt, 0, GPIO_DEV_MAX, "gpio");
+ if (err < 0)
+ goto err_alloc_chrdev;
+
+ /* Configfs initialization */
+ config_group_init(&gpio_subsys.su_group);
+ mutex_init(&gpio_subsys.su_mutex);
+ err = configfs_register_subsystem(&gpio_subsys);
+ if (err)
+ goto err_register_subsys;
+
+ return 0;
+
+err_register_subsys:
+ unregister_chrdev_region(gpio_devt, GPIO_DEV_MAX);
+err_alloc_chrdev:
+ class_destroy(gpio_dev_class);
+err_class_create:
+ printk(KERN_WARNING "Failed to initialize gpio /dev interface\n");
+ return err;
+}
+late_initcall(gpio_dev_init);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/hsmc.c avr32-2.6/arch/avr32/mach-at32ap/hsmc.c
--- linux-2.6.25.6/arch/avr32/mach-at32ap/hsmc.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/mach-at32ap/hsmc.c 2008-06-12 15:09:38.723815860 +0200
@@ -278,4 +278,4 @@
{
return platform_driver_register(&hsmc_driver);
}
-arch_initcall(hsmc_init);
+core_initcall(hsmc_init);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/intc.c avr32-2.6/arch/avr32/mach-at32ap/intc.c
--- linux-2.6.25.6/arch/avr32/mach-at32ap/intc.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/mach-at32ap/intc.c 2008-06-12 15:09:38.723815860 +0200
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2006 Atmel Corporation
+ * Copyright (C) 2006, 2008 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -12,15 +12,20 @@
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
+#include <linux/sysdev.h>
-#include <asm/intc.h>
#include <asm/io.h>
#include "intc.h"
struct intc {
- void __iomem *regs;
- struct irq_chip chip;
+ void __iomem *regs;
+ struct irq_chip chip;
+ struct sys_device sysdev;
+#ifdef CONFIG_PM
+ unsigned long suspend_ipr;
+ unsigned long saved_ipr[64];
+#endif
};
extern struct platform_device at32_intc0_device;
@@ -137,6 +142,74 @@
panic("Interrupt controller initialization failed!\n");
}
+#ifdef CONFIG_PM
+void intc_set_suspend_handler(unsigned long offset)
+{
+ intc0.suspend_ipr = offset;
+}
+
+static int intc_suspend(struct sys_device *sdev, pm_message_t state)
+{
+ struct intc *intc = container_of(sdev, struct intc, sysdev);
+ int i;
+
+ if (unlikely(!irqs_disabled())) {
+ pr_err("intc_suspend: called with interrupts enabled\n");
+ return -EINVAL;
+ }
+
+ if (unlikely(!intc->suspend_ipr)) {
+ pr_err("intc_suspend: suspend_ipr not initialized\n");
+ return -EINVAL;
+ }
+
+ for (i = 0; i < 64; i++) {
+ intc->saved_ipr[i] = intc_readl(intc, INTPR0 + 4 * i);
+ intc_writel(intc, INTPR0 + 4 * i, intc->suspend_ipr);
+ }
+
+ return 0;
+}
+
+static int intc_resume(struct sys_device *sdev)
+{
+ struct intc *intc = container_of(sdev, struct intc, sysdev);
+ int i;
+
+ WARN_ON(!irqs_disabled());
+
+ for (i = 0; i < 64; i++)
+ intc_writel(intc, INTPR0 + 4 * i, intc->saved_ipr[i]);
+
+ return 0;
+}
+#else
+#define intc_suspend NULL
+#define intc_resume NULL
+#endif
+
+static struct sysdev_class intc_class = {
+ .name = "intc",
+ .suspend = intc_suspend,
+ .resume = intc_resume,
+};
+
+static int __init intc_init_sysdev(void)
+{
+ int ret;
+
+ ret = sysdev_class_register(&intc_class);
+ if (ret)
+ return ret;
+
+ intc0.sysdev.id = 0;
+ intc0.sysdev.cls = &intc_class;
+ ret = sysdev_register(&intc0.sysdev);
+
+ return ret;
+}
+device_initcall(intc_init_sysdev);
+
unsigned long intc_get_pending(unsigned int group)
{
return intc_readl(&intc0, INTREQ0 + 4 * group);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/Kconfig avr32-2.6/arch/avr32/mach-at32ap/Kconfig
--- linux-2.6.25.6/arch/avr32/mach-at32ap/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/mach-at32ap/Kconfig 2008-06-12 15:09:38.719815350 +0200
@@ -26,6 +26,13 @@
endchoice
+config GPIO_DEV
+ bool "GPIO /dev interface"
+ select CONFIGFS_FS
+ default n
+ help
+ Say `Y' to enable a /dev interface to the GPIO pins.
+
endmenu
endif # PLATFORM_AT32AP
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/Makefile avr32-2.6/arch/avr32/mach-at32ap/Makefile
--- linux-2.6.25.6/arch/avr32/mach-at32ap/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/mach-at32ap/Makefile 2008-06-12 15:09:38.719815350 +0200
@@ -1,4 +1,9 @@
-obj-y += at32ap.o clock.o intc.o extint.o pio.o hsmc.o
-obj-$(CONFIG_CPU_AT32AP700X) += at32ap700x.o
-obj-$(CONFIG_CPU_AT32AP700X) += time-tc.o
+obj-y += pdc.o clock.o intc.o extint.o pio.o hsmc.o
+obj-$(CONFIG_CPU_AT32AP700X) += at32ap700x.o pm-at32ap700x.o
obj-$(CONFIG_CPU_FREQ_AT32AP) += cpufreq.o
+obj-$(CONFIG_GPIO_DEV) += gpio-dev.o
+obj-$(CONFIG_PM) += pm.o
+
+ifeq ($(CONFIG_PM_DEBUG),y)
+CFLAGS_pm.o += -DDEBUG
+endif
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/pdc.c avr32-2.6/arch/avr32/mach-at32ap/pdc.c
--- linux-2.6.25.6/arch/avr32/mach-at32ap/pdc.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/mach-at32ap/pdc.c 2008-06-12 15:09:38.723815860 +0200
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+static int __init pdc_probe(struct platform_device *pdev)
+{
+ struct clk *pclk, *hclk;
+
+ pclk = clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(pclk)) {
+ dev_err(&pdev->dev, "no pclk defined\n");
+ return PTR_ERR(pclk);
+ }
+ hclk = clk_get(&pdev->dev, "hclk");
+ if (IS_ERR(hclk)) {
+ dev_err(&pdev->dev, "no hclk defined\n");
+ clk_put(pclk);
+ return PTR_ERR(hclk);
+ }
+
+ clk_enable(pclk);
+ clk_enable(hclk);
+
+ dev_info(&pdev->dev, "Atmel Peripheral DMA Controller enabled\n");
+ return 0;
+}
+
+static struct platform_driver pdc_driver = {
+ .probe = pdc_probe,
+ .driver = {
+ .name = "pdc",
+ },
+};
+
+static int __init pdc_init(void)
+{
+ return platform_driver_register(&pdc_driver);
+}
+arch_initcall(pdc_init);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/pio.c avr32-2.6/arch/avr32/mach-at32ap/pio.c
--- linux-2.6.25.6/arch/avr32/mach-at32ap/pio.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/mach-at32ap/pio.c 2008-06-12 15:09:38.723815860 +0200
@@ -157,6 +157,82 @@
dump_stack();
}
+#ifdef CONFIG_GPIO_DEV
+
+/* Gang allocators and accessors; used by the GPIO /dev driver */
+int at32_gpio_port_is_valid(unsigned int port)
+{
+ return port < MAX_NR_PIO_DEVICES && pio_dev[port].regs != NULL;
+}
+
+int at32_select_gpio_pins(unsigned int port, u32 pins, u32 oe_mask)
+{
+ struct pio_device *pio;
+ u32 old, new;
+
+ pio = &pio_dev[port];
+ BUG_ON(port > ARRAY_SIZE(pio_dev) || !pio->regs || (oe_mask & ~pins));
+
+ /* Try to allocate the pins */
+ do {
+ old = pio->pinmux_mask;
+ if (old & pins)
+ return -EBUSY;
+
+ new = old | pins;
+ } while (cmpxchg(&pio->pinmux_mask, old, new) != old);
+
+ /* That went well, now configure the port */
+ pio_writel(pio, OER, oe_mask);
+ pio_writel(pio, PER, pins);
+
+ return 0;
+}
+
+void at32_deselect_pins(unsigned int port, u32 pins)
+{
+ struct pio_device *pio;
+ u32 old, new;
+
+ pio = &pio_dev[port];
+ BUG_ON(port > ARRAY_SIZE(pio_dev) || !pio->regs);
+
+ /* Return to a "safe" mux configuration */
+ pio_writel(pio, PUER, pins);
+ pio_writel(pio, ODR, pins);
+
+ /* Deallocate the pins */
+ do {
+ old = pio->pinmux_mask;
+ new = old & ~pins;
+ } while (cmpxchg(&pio->pinmux_mask, old, new) != old);
+}
+
+u32 at32_gpio_get_value_multiple(unsigned int port, u32 pins)
+{
+ struct pio_device *pio;
+
+ pio = &pio_dev[port];
+ BUG_ON(port > ARRAY_SIZE(pio_dev) || !pio->regs);
+
+ return pio_readl(pio, PDSR) & pins;
+}
+
+void at32_gpio_set_value_multiple(unsigned int port, u32 value, u32 mask)
+{
+ struct pio_device *pio;
+
+ pio = &pio_dev[port];
+ BUG_ON(port > ARRAY_SIZE(pio_dev) || !pio->regs);
+
+ /* No atomic updates for now... */
+ pio_writel(pio, CODR, ~value & mask);
+ pio_writel(pio, SODR, value & mask);
+}
+
+#endif /* CONFIG_GPIO_DEV */
+
+
/*--------------------------------------------------------------------------*/
/* GPIO API */
@@ -318,6 +394,8 @@
const char *label;
label = gpiochip_is_requested(chip, i);
+ if (!label && (imr & mask))
+ label = "[irq]";
if (!label)
continue;
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/pm-at32ap700x.S avr32-2.6/arch/avr32/mach-at32ap/pm-at32ap700x.S
--- linux-2.6.25.6/arch/avr32/mach-at32ap/pm-at32ap700x.S 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/mach-at32ap/pm-at32ap700x.S 2008-06-12 15:09:38.723815860 +0200
@@ -0,0 +1,174 @@
+/*
+ * Low-level Power Management code.
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <asm/asm.h>
+#include <asm/asm-offsets.h>
+#include <asm/thread_info.h>
+#include <asm/arch/pm.h>
+
+#include "pm.h"
+#include "sdramc.h"
+
+/* Same as 0xfff00000 but fits in a 21 bit signed immediate */
+#define PM_BASE -0x100000
+
+ .section .bss, "wa", @nobits
+ .global disable_idle_sleep
+ .type disable_idle_sleep, @object
+disable_idle_sleep:
+ .int 4
+ .size disable_idle_sleep, . - disable_idle_sleep
+
+ /* Keep this close to the irq handlers */
+ .section .irq.text, "ax", @progbits
+
+ /*
+ * void cpu_enter_idle(void)
+ *
+ * Put the CPU into "idle" mode, in which it will consume
+ * significantly less power.
+ *
+ * If an interrupt comes along in the window between
+ * unmask_interrupts and the sleep instruction below, the
+ * interrupt code will adjust the return address so that we
+ * never execute the sleep instruction. This is required
+ * because the AP7000 doesn't unmask interrupts when entering
+ * sleep modes; later CPUs may not need this workaround.
+ */
+ .global cpu_enter_idle
+ .type cpu_enter_idle, @function
+cpu_enter_idle:
+ mask_interrupts
+ get_thread_info r8
+ ld.w r9, r8[TI_flags]
+ bld r9, TIF_NEED_RESCHED
+ brcs .Lret_from_sleep
+ sbr r9, TIF_CPU_GOING_TO_SLEEP
+ st.w r8[TI_flags], r9
+ unmask_interrupts
+ sleep CPU_SLEEP_IDLE
+ .size cpu_idle_sleep, . - cpu_idle_sleep
+
+ /*
+ * Common return path for PM functions that don't run from
+ * SRAM.
+ */
+ .global cpu_idle_skip_sleep
+ .type cpu_idle_skip_sleep, @function
+cpu_idle_skip_sleep:
+ mask_interrupts
+ ld.w r9, r8[TI_flags]
+ cbr r9, TIF_CPU_GOING_TO_SLEEP
+ st.w r8[TI_flags], r9
+.Lret_from_sleep:
+ unmask_interrupts
+ retal r12
+ .size cpu_idle_skip_sleep, . - cpu_idle_skip_sleep
+
+#ifdef CONFIG_PM
+ .section .init.text, "ax", @progbits
+
+ .global pm_exception
+ .type pm_exception, @function
+pm_exception:
+ /*
+ * Exceptions are masked when we switch to this handler, so
+ * we'll only get "unrecoverable" exceptions (offset 0.)
+ */
+ sub r12, pc, . - .Lpanic_msg
+ lddpc pc, .Lpanic_addr
+
+ .align 2
+.Lpanic_addr:
+ .long panic
+.Lpanic_msg:
+ .asciz "Unrecoverable exception during suspend\n"
+ .size pm_exception, . - pm_exception
+
+ .global pm_irq0
+ .type pm_irq0, @function
+pm_irq0:
+ /* Disable interrupts and return after the sleep instruction */
+ mfsr r9, SYSREG_RSR_INT0
+ mtsr SYSREG_RAR_INT0, r8
+ sbr r9, SYSREG_GM_OFFSET
+ mtsr SYSREG_RSR_INT0, r9
+ rete
+
+ /*
+ * void cpu_enter_standby(unsigned long sdramc_base)
+ *
+ * Enter PM_SUSPEND_STANDBY mode. At this point, all drivers
+ * are suspended and interrupts are disabled. Interrupts
+ * marked as 'wakeup' event sources may still come along and
+ * get us out of here.
+ *
+ * The SDRAM will be put into self-refresh mode (which does
+ * not require a clock from the CPU), and the CPU will be put
+ * into "frozen" mode (HSB bus stopped). The SDRAM controller
+ * will automatically bring the SDRAM into normal mode on the
+ * first access, and the power manager will automatically
+ * start the HSB and CPU clocks upon a wakeup event.
+ *
+ * This code uses the same "skip sleep" technique as above.
+ * It is very important that we jump directly to
+ * cpu_after_sleep after the sleep instruction since that's
+ * where we'll end up if the interrupt handler decides that we
+ * need to skip the sleep instruction.
+ */
+ .global pm_standby
+ .type pm_standby, @function
+pm_standby:
+ /*
+ * interrupts are already masked at this point, and EVBA
+ * points to pm_exception above.
+ */
+ ld.w r10, r12[SDRAMC_LPR]
+ sub r8, pc, . - 1f /* return address for irq handler */
+ mov r11, SDRAMC_LPR_LPCB_SELF_RFR
+ bfins r10, r11, 0, 2 /* LPCB <- self Refresh */
+ sync 0 /* flush write buffer */
+ st.w r12[SDRAMC_LPR], r11 /* put SDRAM in self-refresh mode */
+ ld.w r11, r12[SDRAMC_LPR]
+ unmask_interrupts
+ sleep CPU_SLEEP_FROZEN
+1: mask_interrupts
+ retal r12
+ .size pm_standby, . - pm_standby
+
+ .global pm_suspend_to_ram
+ .type pm_suspend_to_ram, @function
+pm_suspend_to_ram:
+ /*
+ * interrupts are already masked at this point, and EVBA
+ * points to pm_exception above.
+ */
+ mov r11, 0
+ cache r11[2], 8 /* clean all dcache lines */
+ sync 0 /* flush write buffer */
+ ld.w r10, r12[SDRAMC_LPR]
+ sub r8, pc, . - 1f /* return address for irq handler */
+ mov r11, SDRAMC_LPR_LPCB_SELF_RFR
+ bfins r10, r11, 0, 2 /* LPCB <- self refresh */
+ st.w r12[SDRAMC_LPR], r10 /* put SDRAM in self-refresh mode */
+ ld.w r11, r12[SDRAMC_LPR]
+
+ unmask_interrupts
+ sleep CPU_SLEEP_STOP
+1: mask_interrupts
+
+ retal r12
+ .size pm_suspend_to_ram, . - pm_suspend_to_ram
+
+ .global pm_sram_end
+ .type pm_sram_end, @function
+pm_sram_end:
+ .size pm_sram_end, 0
+
+#endif /* CONFIG_PM */
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/pm.c avr32-2.6/arch/avr32/mach-at32ap/pm.c
--- linux-2.6.25.6/arch/avr32/mach-at32ap/pm.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/mach-at32ap/pm.c 2008-06-12 15:09:38.723815860 +0200
@@ -0,0 +1,245 @@
+/*
+ * AVR32 AP Power Management
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+#include <linux/io.h>
+#include <linux/suspend.h>
+#include <linux/vmalloc.h>
+
+#include <asm/cacheflush.h>
+#include <asm/sysreg.h>
+
+#include <asm/arch/pm.h>
+#include <asm/arch/sram.h>
+
+/* FIXME: This is only valid for AP7000 */
+#define SDRAMC_BASE 0xfff03800
+
+#include "sdramc.h"
+
+#define SRAM_PAGE_FLAGS (SYSREG_BIT(TLBELO_D) | SYSREG_BF(SZ, 1) \
+ | SYSREG_BF(AP, 3) | SYSREG_BIT(G))
+
+
+static unsigned long pm_sram_start;
+static size_t pm_sram_size;
+static struct vm_struct *pm_sram_area;
+
+static void (*avr32_pm_enter_standby)(unsigned long sdramc_base);
+static void (*avr32_pm_enter_str)(unsigned long sdramc_base);
+
+/*
+ * Must be called with interrupts disabled. Exceptions will be masked
+ * on return (i.e. all exceptions will be "unrecoverable".)
+ */
+static void *avr32_pm_map_sram(void)
+{
+ unsigned long vaddr;
+ unsigned long page_addr;
+ u32 tlbehi;
+ u32 mmucr;
+
+ vaddr = (unsigned long)pm_sram_area->addr;
+ page_addr = pm_sram_start & PAGE_MASK;
+
+ /*
+ * Mask exceptions and grab the first TLB entry. We won't be
+ * needing it while sleeping.
+ */
+ asm volatile("ssrf %0" : : "i"(SYSREG_EM_OFFSET) : "memory");
+
+ mmucr = sysreg_read(MMUCR);
+ tlbehi = sysreg_read(TLBEHI);
+ sysreg_write(MMUCR, SYSREG_BFINS(DRP, 0, mmucr));
+
+ tlbehi = SYSREG_BF(ASID, SYSREG_BFEXT(ASID, tlbehi));
+ tlbehi |= vaddr & PAGE_MASK;
+ tlbehi |= SYSREG_BIT(TLBEHI_V);
+
+ sysreg_write(TLBELO, page_addr | SRAM_PAGE_FLAGS);
+ sysreg_write(TLBEHI, tlbehi);
+ __builtin_tlbw();
+
+ return (void *)(vaddr + pm_sram_start - page_addr);
+}
+
+/*
+ * Must be called with interrupts disabled. Exceptions will be
+ * unmasked on return.
+ */
+static void avr32_pm_unmap_sram(void)
+{
+ u32 mmucr;
+ u32 tlbehi;
+ u32 tlbarlo;
+
+ /* Going to update TLB entry at index 0 */
+ mmucr = sysreg_read(MMUCR);
+ tlbehi = sysreg_read(TLBEHI);
+ sysreg_write(MMUCR, SYSREG_BFINS(DRP, 0, mmucr));
+
+ /* Clear the "valid" bit */
+ tlbehi = SYSREG_BF(ASID, SYSREG_BFEXT(ASID, tlbehi));
+ sysreg_write(TLBEHI, tlbehi);
+
+ /* Mark it as "not accessed" */
+ tlbarlo = sysreg_read(TLBARLO);
+ sysreg_write(TLBARLO, tlbarlo | 0x80000000U);
+
+ /* Update the TLB */
+ __builtin_tlbw();
+
+ /* Unmask exceptions */
+ asm volatile("csrf %0" : : "i"(SYSREG_EM_OFFSET) : "memory");
+}
+
+static int avr32_pm_valid_state(suspend_state_t state)
+{
+ switch (state) {
+ case PM_SUSPEND_ON:
+ case PM_SUSPEND_STANDBY:
+ case PM_SUSPEND_MEM:
+ return 1;
+
+ default:
+ return 0;
+ }
+}
+
+static int avr32_pm_enter(suspend_state_t state)
+{
+ u32 lpr_saved;
+ u32 evba_saved;
+ void *sram;
+
+ switch (state) {
+ case PM_SUSPEND_STANDBY:
+ sram = avr32_pm_map_sram();
+
+ /* Switch to in-sram exception handlers */
+ evba_saved = sysreg_read(EVBA);
+ sysreg_write(EVBA, (unsigned long)sram);
+
+ /*
+ * Save the LPR register so that we can re-enable
+ * SDRAM Low Power mode on resume.
+ */
+ lpr_saved = sdramc_readl(LPR);
+ pr_debug("%s: Entering standby...\n", __func__);
+ avr32_pm_enter_standby(SDRAMC_BASE);
+ sdramc_writel(LPR, lpr_saved);
+
+ /* Switch back to regular exception handlers */
+ sysreg_write(EVBA, evba_saved);
+
+ avr32_pm_unmap_sram();
+ break;
+
+ case PM_SUSPEND_MEM:
+ sram = avr32_pm_map_sram();
+
+ /* Switch to in-sram exception handlers */
+ evba_saved = sysreg_read(EVBA);
+ sysreg_write(EVBA, (unsigned long)sram);
+
+ /*
+ * Save the LPR register so that we can re-enable
+ * SDRAM Low Power mode on resume.
+ */
+ lpr_saved = sdramc_readl(LPR);
+ pr_debug("%s: Entering suspend-to-ram...\n", __func__);
+ avr32_pm_enter_str(SDRAMC_BASE);
+ sdramc_writel(LPR, lpr_saved);
+
+ /* Switch back to regular exception handlers */
+ sysreg_write(EVBA, evba_saved);
+
+ avr32_pm_unmap_sram();
+ break;
+
+ case PM_SUSPEND_ON:
+ pr_debug("%s: Entering idle...\n", __func__);
+ cpu_enter_idle();
+ break;
+
+ default:
+ pr_debug("%s: Invalid suspend state %d\n", __func__, state);
+ goto out;
+ }
+
+ pr_debug("%s: wakeup\n", __func__);
+
+out:
+ return 0;
+}
+
+static struct platform_suspend_ops avr32_pm_ops = {
+ .valid = avr32_pm_valid_state,
+ .enter = avr32_pm_enter,
+};
+
+static unsigned long avr32_pm_offset(void *symbol)
+{
+ extern u8 pm_exception[];
+
+ return (unsigned long)symbol - (unsigned long)pm_exception;
+}
+
+static int __init avr32_pm_init(void)
+{
+ extern u8 pm_exception[];
+ extern u8 pm_irq0[];
+ extern u8 pm_standby[];
+ extern u8 pm_suspend_to_ram[];
+ extern u8 pm_sram_end[];
+ void *dst;
+
+ /*
+ * To keep things simple, we depend on not needing more than a
+ * single page.
+ */
+ pm_sram_size = avr32_pm_offset(pm_sram_end);
+ if (pm_sram_size > PAGE_SIZE)
+ goto err;
+
+ pm_sram_start = sram_alloc(pm_sram_size);
+ if (!pm_sram_start)
+ goto err_alloc_sram;
+
+ /* Grab a virtual area we can use later on. */
+ pm_sram_area = get_vm_area(pm_sram_size, VM_IOREMAP);
+ if (!pm_sram_area)
+ goto err_vm_area;
+ pm_sram_area->phys_addr = pm_sram_start;
+
+ local_irq_disable();
+ dst = avr32_pm_map_sram();
+ memcpy(dst, pm_exception, pm_sram_size);
+ flush_dcache_region(dst, pm_sram_size);
+ invalidate_icache_region(dst, pm_sram_size);
+ avr32_pm_unmap_sram();
+ local_irq_enable();
+
+ avr32_pm_enter_standby = dst + avr32_pm_offset(pm_standby);
+ avr32_pm_enter_str = dst + avr32_pm_offset(pm_suspend_to_ram);
+ intc_set_suspend_handler(avr32_pm_offset(pm_irq0));
+
+ suspend_set_ops(&avr32_pm_ops);
+
+ printk("AVR32 AP Power Management enabled\n");
+
+ return 0;
+
+err_vm_area:
+ sram_free(pm_sram_start, pm_sram_size);
+err_alloc_sram:
+err:
+ pr_err("AVR32 Power Management initialization failed\n");
+ return -ENOMEM;
+}
+arch_initcall(avr32_pm_init);
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/sdramc.h avr32-2.6/arch/avr32/mach-at32ap/sdramc.h
--- linux-2.6.25.6/arch/avr32/mach-at32ap/sdramc.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/arch/avr32/mach-at32ap/sdramc.h 2008-06-12 15:09:38.723815860 +0200
@@ -0,0 +1,76 @@
+/*
+ * Register definitions for the AT32AP SDRAM Controller
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+/* Register offsets */
+#define SDRAMC_MR 0x0000
+#define SDRAMC_TR 0x0004
+#define SDRAMC_CR 0x0008
+#define SDRAMC_HSR 0x000c
+#define SDRAMC_LPR 0x0010
+#define SDRAMC_IER 0x0014
+#define SDRAMC_IDR 0x0018
+#define SDRAMC_IMR 0x001c
+#define SDRAMC_ISR 0x0020
+#define SDRAMC_MDR 0x0024
+
+/* MR - Mode Register */
+#define SDRAMC_MR_MODE_NORMAL ( 0 << 0)
+#define SDRAMC_MR_MODE_NOP ( 1 << 0)
+#define SDRAMC_MR_MODE_BANKS_PRECHARGE ( 2 << 0)
+#define SDRAMC_MR_MODE_LOAD_MODE ( 3 << 0)
+#define SDRAMC_MR_MODE_AUTO_REFRESH ( 4 << 0)
+#define SDRAMC_MR_MODE_EXT_LOAD_MODE ( 5 << 0)
+#define SDRAMC_MR_MODE_POWER_DOWN ( 6 << 0)
+
+/* CR - Configuration Register */
+#define SDRAMC_CR_NC_8_BITS ( 0 << 0)
+#define SDRAMC_CR_NC_9_BITS ( 1 << 0)
+#define SDRAMC_CR_NC_10_BITS ( 2 << 0)
+#define SDRAMC_CR_NC_11_BITS ( 3 << 0)
+#define SDRAMC_CR_NR_11_BITS ( 0 << 2)
+#define SDRAMC_CR_NR_12_BITS ( 1 << 2)
+#define SDRAMC_CR_NR_13_BITS ( 2 << 2)
+#define SDRAMC_CR_NB_2_BANKS ( 0 << 4)
+#define SDRAMC_CR_NB_4_BANKS ( 1 << 4)
+#define SDRAMC_CR_CAS(x) ((x) << 5)
+#define SDRAMC_CR_DBW_32_BITS ( 0 << 7)
+#define SDRAMC_CR_DBW_16_BITS ( 1 << 7)
+#define SDRAMC_CR_TWR(x) ((x) << 8)
+#define SDRAMC_CR_TRC(x) ((x) << 12)
+#define SDRAMC_CR_TRP(x) ((x) << 16)
+#define SDRAMC_CR_TRCD(x) ((x) << 20)
+#define SDRAMC_CR_TRAS(x) ((x) << 24)
+#define SDRAMC_CR_TXSR(x) ((x) << 28)
+
+/* HSR - High Speed Register */
+#define SDRAMC_HSR_DA ( 1 << 0)
+
+/* LPR - Low Power Register */
+#define SDRAMC_LPR_LPCB_INHIBIT ( 0 << 0)
+#define SDRAMC_LPR_LPCB_SELF_RFR ( 1 << 0)
+#define SDRAMC_LPR_LPCB_PDOWN ( 2 << 0)
+#define SDRAMC_LPR_LPCB_DEEP_PDOWN ( 3 << 0)
+#define SDRAMC_LPR_PASR(x) ((x) << 4)
+#define SDRAMC_LPR_TCSR(x) ((x) << 8)
+#define SDRAMC_LPR_DS(x) ((x) << 10)
+#define SDRAMC_LPR_TIMEOUT(x) ((x) << 12)
+
+/* IER/IDR/IMR/ISR - Interrupt Enable/Disable/Mask/Status Register */
+#define SDRAMC_ISR_RES ( 1 << 0)
+
+/* MDR - Memory Device Register */
+#define SDRAMC_MDR_MD_SDRAM ( 0 << 0)
+#define SDRAMC_MDR_MD_LOW_PWR_SDRAM ( 1 << 0)
+
+/* Register access macros */
+#define sdramc_readl(reg) \
+ __raw_readl((void __iomem __force *)SDRAMC_BASE + SDRAMC_##reg)
+#define sdramc_writel(reg, value) \
+ __raw_writel(value, (void __iomem __force *)SDRAMC_BASE + SDRAMC_##reg)
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mach-at32ap/time-tc.c avr32-2.6/arch/avr32/mach-at32ap/time-tc.c
--- linux-2.6.25.6/arch/avr32/mach-at32ap/time-tc.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/mach-at32ap/time-tc.c 1970-01-01 01:00:00.000000000 +0100
@@ -1,218 +0,0 @@
-/*
- * Copyright (C) 2004-2007 Atmel Corporation
- *
- * Based on MIPS implementation arch/mips/kernel/time.c
- * Copyright 2001 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/clk.h>
-#include <linux/clocksource.h>
-#include <linux/time.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/kernel_stat.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/profile.h>
-#include <linux/sysdev.h>
-#include <linux/err.h>
-
-#include <asm/div64.h>
-#include <asm/sysreg.h>
-#include <asm/io.h>
-#include <asm/sections.h>
-
-#include <asm/arch/time.h>
-
-/* how many counter cycles in a jiffy? */
-static u32 cycles_per_jiffy;
-
-/* the count value for the next timer interrupt */
-static u32 expirelo;
-
-/* the I/O registers of the TC module */
-static void __iomem *ioregs;
-
-cycle_t read_cycle_count(void)
-{
- return (cycle_t)timer_read(ioregs, 0, CV);
-}
-
-struct clocksource clocksource_avr32 = {
- .name = "avr32",
- .rating = 342,
- .read = read_cycle_count,
- .mask = CLOCKSOURCE_MASK(16),
- .shift = 16,
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static void avr32_timer_ack(void)
-{
- u16 count = expirelo;
-
- /* Ack this timer interrupt and set the next one, use a u16
- * variable so it will wrap around correctly */
- count += cycles_per_jiffy;
- expirelo = count;
- timer_write(ioregs, 0, RC, expirelo);
-
- /* Check to see if we have missed any timer interrupts */
- count = timer_read(ioregs, 0, CV);
- if ((count - expirelo) < 0x7fff) {
- expirelo = count + cycles_per_jiffy;
- timer_write(ioregs, 0, RC, expirelo);
- }
-}
-
-u32 avr32_hpt_read(void)
-{
- return timer_read(ioregs, 0, CV);
-}
-
-static int avr32_timer_calc_div_and_set_jiffies(struct clk *pclk)
-{
- unsigned int cycles_max = (clocksource_avr32.mask + 1) / 2;
- unsigned int divs[] = { 4, 8, 16, 32 };
- int divs_size = ARRAY_SIZE(divs);
- int i = 0;
- unsigned long count_hz;
- unsigned long shift;
- unsigned long mult;
- int clock_div = -1;
- u64 tmp;
-
- shift = clocksource_avr32.shift;
-
- do {
- count_hz = clk_get_rate(pclk) / divs[i];
- mult = clocksource_hz2mult(count_hz, shift);
- clocksource_avr32.mult = mult;
-
- tmp = TICK_NSEC;
- tmp <<= shift;
- tmp += mult / 2;
- do_div(tmp, mult);
-
- cycles_per_jiffy = tmp;
- } while (cycles_per_jiffy > cycles_max && ++i < divs_size);
-
- clock_div = i + 1;
-
- if (clock_div > divs_size) {
- pr_debug("timer: could not calculate clock divider\n");
- return -EFAULT;
- }
-
- /* Set the clock divider */
- timer_write(ioregs, 0, CMR, TIMER_BF(CMR_TCCLKS, clock_div));
-
- return 0;
-}
-
-int avr32_hpt_init(unsigned int count)
-{
- struct resource *regs;
- struct clk *pclk;
- int irq = -1;
- int ret = 0;
-
- ret = -ENXIO;
-
- irq = platform_get_irq(&at32_systc0_device, 0);
- if (irq < 0) {
- pr_debug("timer: could not get irq\n");
- goto out_error;
- }
-
- pclk = clk_get(&at32_systc0_device.dev, "pclk");
- if (IS_ERR(pclk)) {
- pr_debug("timer: could not get clk: %ld\n", PTR_ERR(pclk));
- goto out_error;
- }
- clk_enable(pclk);
-
- regs = platform_get_resource(&at32_systc0_device, IORESOURCE_MEM, 0);
- if (!regs) {
- pr_debug("timer: could not get resource\n");
- goto out_error_clk;
- }
-
- ioregs = ioremap(regs->start, regs->end - regs->start + 1);
- if (!ioregs) {
- pr_debug("timer: could not get ioregs\n");
- goto out_error_clk;
- }
-
- ret = avr32_timer_calc_div_and_set_jiffies(pclk);
- if (ret)
- goto out_error_io;
-
- ret = setup_irq(irq, &timer_irqaction);
- if (ret) {
- pr_debug("timer: could not request irq %d: %d\n",
- irq, ret);
- goto out_error_io;
- }
-
- expirelo = (timer_read(ioregs, 0, CV) / cycles_per_jiffy + 1)
- * cycles_per_jiffy;
-
- /* Enable clock and interrupts on RC compare */
- timer_write(ioregs, 0, CCR, TIMER_BIT(CCR_CLKEN));
- timer_write(ioregs, 0, IER, TIMER_BIT(IER_CPCS));
- /* Set cycles to first interrupt */
- timer_write(ioregs, 0, RC, expirelo);
-
- printk(KERN_INFO "timer: AT32AP system timer/counter at 0x%p irq %d\n",
- ioregs, irq);
-
- return 0;
-
-out_error_io:
- iounmap(ioregs);
-out_error_clk:
- clk_put(pclk);
-out_error:
- return ret;
-}
-
-int avr32_hpt_start(void)
-{
- timer_write(ioregs, 0, CCR, TIMER_BIT(CCR_SWTRG));
- return 0;
-}
-
-irqreturn_t timer_interrupt(int irq, void *dev_id)
-{
- unsigned int sr = timer_read(ioregs, 0, SR);
-
- if (sr & TIMER_BIT(SR_CPCS)) {
- /* ack timer interrupt and try to set next interrupt */
- avr32_timer_ack();
-
- /*
- * Call the generic timer interrupt handler
- */
- write_seqlock(&xtime_lock);
- do_timer(1);
- write_sequnlock(&xtime_lock);
-
- /*
- * In UP mode, we call local_timer_interrupt() to do profiling
- * and process accounting.
- *
- * SMP is not supported yet.
- */
- local_timer_interrupt(irq, dev_id);
-
- return IRQ_HANDLED;
- }
-
- return IRQ_NONE;
-}
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/Makefile avr32-2.6/arch/avr32/Makefile
--- linux-2.6.25.6/arch/avr32/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/Makefile 2008-06-12 15:09:38.711815728 +0200
@@ -32,6 +32,7 @@
core-y += arch/avr32/kernel/
core-y += arch/avr32/mm/
drivers-$(CONFIG_OPROFILE) += arch/avr32/oprofile/
+drivers-y += arch/avr32/drivers/
libs-y += arch/avr32/lib/
archincdir-$(CONFIG_PLATFORM_AT32AP) := arch-at32ap
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/mm/init.c avr32-2.6/arch/avr32/mm/init.c
--- linux-2.6.25.6/arch/avr32/mm/init.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/mm/init.c 2008-06-12 15:09:38.727815811 +0200
@@ -11,6 +11,7 @@
#include <linux/swap.h>
#include <linux/init.h>
#include <linux/mmzone.h>
+#include <linux/module.h>
#include <linux/bootmem.h>
#include <linux/pagemap.h>
#include <linux/nodemask.h>
@@ -28,15 +29,13 @@
pgd_t swapper_pg_dir[PTRS_PER_PGD];
struct page *empty_zero_page;
+EXPORT_SYMBOL(empty_zero_page);
/*
* Cache of MMU context last used.
*/
unsigned long mmu_context_cache = NO_CONTEXT;
-#define START_PFN (NODE_DATA(0)->bdata->node_boot_start >> PAGE_SHIFT)
-#define MAX_LOW_PFN (NODE_DATA(0)->bdata->node_low_pfn)
-
void show_mem(void)
{
int total = 0, reserved = 0, cached = 0;
diff --exclude=.git -urN linux-2.6.25.6/arch/avr32/oprofile/op_model_avr32.c avr32-2.6/arch/avr32/oprofile/op_model_avr32.c
--- linux-2.6.25.6/arch/avr32/oprofile/op_model_avr32.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/arch/avr32/oprofile/op_model_avr32.c 2008-06-12 15:03:55.895816260 +0200
@@ -16,7 +16,6 @@
#include <linux/sched.h>
#include <linux/types.h>
-#include <asm/intc.h>
#include <asm/sysreg.h>
#include <asm/system.h>
diff --exclude=.git -urN linux-2.6.25.6/Documentation/ABI/stable/sysfs-class-ubi avr32-2.6/Documentation/ABI/stable/sysfs-class-ubi
--- linux-2.6.25.6/Documentation/ABI/stable/sysfs-class-ubi 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/Documentation/ABI/stable/sysfs-class-ubi 2008-06-12 15:03:55.427814470 +0200
@@ -0,0 +1,212 @@
+What: /sys/class/ubi/
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ The ubi/ class sub-directory belongs to the UBI subsystem and
+ provides general UBI information, per-UBI device information
+ and per-UBI volume information.
+
+What: /sys/class/ubi/version
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ This file contains version of the latest supported UBI on-media
+ format. Currently it is 1, and there is no plan to change this.
+ However, if in the future UBI needs on-flash format changes
+ which cannot be done in a compatible manner, a new format
+ version will be added. So this is a mechanism for possible
+ future backward-compatible (but forward-incompatible)
+ improvements.
+
+What: /sys/class/ubiX/
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ The /sys/class/ubi0, /sys/class/ubi1, etc directories describe
+ UBI devices (UBI device 0, 1, etc). They contain general UBI
+ device information and per UBI volume information (each UBI
+ device may have many UBI volumes)
+
+What: /sys/class/ubi/ubiX/avail_eraseblocks
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Amount of available logical eraseblock. For example, one may
+ create a new UBI volume which has this amount of logical
+ eraseblocks.
+
+What: /sys/class/ubi/ubiX/bad_peb_count
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Count of bad physical eraseblocks on the underlying MTD device.
+
+What: /sys/class/ubi/ubiX/bgt_enabled
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Contains ASCII "0\n" if the UBI background thread is disabled,
+ and ASCII "1\n" if it is enabled.
+
+What: /sys/class/ubi/ubiX/dev
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Major and minor numbers of the character device corresponding
+ to this UBI device (in <major>:<minor> format).
+
+What: /sys/class/ubi/ubiX/eraseblock_size
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Maximum logical eraseblock size this UBI device may provide. UBI
+ volumes may have smaller logical eraseblock size because of their
+ alignment.
+
+What: /sys/class/ubi/ubiX/max_ec
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Maximum physical eraseblock erase counter value.
+
+What: /sys/class/ubi/ubiX/max_vol_count
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Maximum number of volumes which this UBI device may have.
+
+What: /sys/class/ubi/ubiX/min_io_size
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Minimum input/output unit size. All the I/O may only be done
+ in fractions of the contained number.
+
+What: /sys/class/ubi/ubiX/mtd_num
+Date: January 2008
+KernelVersion: 2.6.25
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Number of the underlying MTD device.
+
+What: /sys/class/ubi/ubiX/reserved_for_bad
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Number of physical eraseblocks reserved for bad block handling.
+
+What: /sys/class/ubi/ubiX/total_eraseblocks
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Total number of good (not marked as bad) physical eraseblocks on
+ the underlying MTD device.
+
+What: /sys/class/ubi/ubiX/volumes_count
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Count of volumes on this UBI device.
+
+What: /sys/class/ubi/ubiX/ubiX_Y/
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ The /sys/class/ubi/ubiX/ubiX_0/, /sys/class/ubi/ubiX/ubiX_1/,
+ etc directories describe UBI volumes on UBI device X (volumes
+ 0, 1, etc).
+
+What: /sys/class/ubi/ubiX/ubiX_Y/alignment
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Volume alignment - the value the logical eraseblock size of
+ this volume has to be aligned on. For example, 2048 means that
+ logical eraseblock size is multiple of 2048. In other words,
+ volume logical eraseblock size is UBI device logical eraseblock
+ size aligned to the alignment value.
+
+What: /sys/class/ubi/ubiX/ubiX_Y/corrupted
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Contains ASCII "0\n" if the UBI volume is OK, and ASCII "1\n"
+ if it is corrupted (e.g., due to an interrupted volume update).
+
+What: /sys/class/ubi/ubiX/ubiX_Y/data_bytes
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ The amount of data this volume contains. This value makes sense
+ only for static volumes, and for dynamic volume it equivalent
+ to the total volume size in bytes.
+
+What: /sys/class/ubi/ubiX/ubiX_Y/dev
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Major and minor numbers of the character device corresponding
+ to this UBI volume (in <major>:<minor> format).
+
+What: /sys/class/ubi/ubiX/ubiX_Y/name
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Volume name.
+
+What: /sys/class/ubi/ubiX/ubiX_Y/reserved_ebs
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Count of physical eraseblock reserved for this volume.
+ Equivalent to the volume size in logical eraseblocks.
+
+What: /sys/class/ubi/ubiX/ubiX_Y/type
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Volume type. Contains ASCII "dynamic\n" for dynamic volumes and
+ "static\n" for static volumes.
+
+What: /sys/class/ubi/ubiX/ubiX_Y/upd_marker
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Contains ASCII "0\n" if the update marker is not set for this
+ volume, and "1\n" if it is set. The update marker is set when
+ volume update starts, and cleaned when it ends. So the presence
+ of the update marker indicates that the volume is being updated
+ at the moment of the update was interrupted. The later may be
+ checked using the "corrupted" sysfs file.
+
+What: /sys/class/ubi/ubiX/ubiX_Y/usable_eb_size
+Date: July 2006
+KernelVersion: 2.6.22
+Contact: Artem Bityutskiy <dedekind@infradead.org>
+Description:
+ Logical eraseblock size of this volume. Equivalent to logical
+ eraseblock size of the device aligned on the volume alignment
+ value.
diff --exclude=.git -urN linux-2.6.25.6/Documentation/filesystems/ubifs.txt avr32-2.6/Documentation/filesystems/ubifs.txt
--- linux-2.6.25.6/Documentation/filesystems/ubifs.txt 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/Documentation/filesystems/ubifs.txt 2008-06-12 15:09:38.451815572 +0200
@@ -0,0 +1,163 @@
+Introduction
+=============
+
+UBIFS file-system stands for UBI File System. UBI stands for "Unsorted
+Block Images". UBIFS is a flash file system, which means it is designed
+to work with flash devices. It is important to understand, that UBIFS
+is completely different to any traditional file-system in Linux, like
+Ext2, XFS, JFS, etc. UBIFS represents a separate class of file-systems
+which work with MTD devices, not block devices. The other Linux
+file-system of this class is JFFS2.
+
+To make it more clear, here is a small comparison of MTD devices and
+block devices.
+
+1 MTD devices represent flash devices and they consist of eraseblocks of
+ rather large size, typically about 128KiB. Block devices consist of
+ small blocks, typically 512 bytes.
+2 MTD devices support 3 main operations - read from some offset within an
+ eraseblock, write to some offset within an eraseblock, and erase a whole
+ eraseblock. Block devices support 2 main operations - read a whole
+ block and write a whole block.
+3 The whole eraseblock has to be erased before it becomes possible to
+ re-write its contents. Blocks may be just re-written.
+4 Eraseblocks become worn out after some number of erase cycles -
+ typically 100K-1G for SLC NAND and NOR flashes, and 1K-10K for MLC
+ NAND flashes. Blocks do not have the wear-out property.
+5 Eraseblocks may become bad (only on NAND flashes) and software should
+ deal with this. Blocks on hard drives typically do not become bad,
+ because hardware has mechanisms to substitute bad blocks, at least in
+ modern LBA disks.
+
+It should be quite obvious why UBIFS is very different to traditional
+file-systems.
+
+UBIFS works on top of UBI. UBI is a separate software layer which may be
+found in drivers/mtd/ubi. UBI is basically a volume management and
+wear-leveling layer. It provides so called UBI volumes which is a higher
+level abstraction than a MTD device. The programming model of UBI devices
+is very similar to MTD devices - they still consist of large eraseblocks,
+they have read/write/erase operations, but UBI devices are devoid of
+limitations like wear and bad blocks (items 4 and 5 in the above list).
+
+In a sense, UBIFS is a next generation of JFFS2 file-system, but it is
+very different and incompatible to JFFS2. The following are the main
+differences.
+
+* JFFS2 works on top of MTD devices, UBIFS depends on UBI and works on
+ top of UBI volumes.
+* JFFS2 does not have on-media index and has to build it while mounting,
+ which requires full media scan. UBIFS maintains the FS indexing
+ information on the flash media and does not require full media scan,
+ so it mounts many times faster than JFFS2.
+* JFFS2 is a write-through file-system, while UBIFS supports write-back,
+ which makes UBIFS much faster on writes.
+
+Similarly to JFFS2, UBIFS supports on-the-flight compression which makes
+it possible to fit quite a lot of data to the flash.
+
+Similarly to JFFS2, UBIFS is tolerant of unclean reboots and power-cuts.
+It does not need stuff like ckfs.ext2. UBIFS automatically replays its
+journal and recovers from crashes, ensuring that the on-flash data
+structures are consistent.
+
+UBIFS scales logarithmically (most of the data structures it uses are
+trees), so the mount time and memory consumption do not linearly depend
+on the flash size, like in case of JFFS2. This is because UBIFS
+maintains the FS index on the flash media. However, UBIFS depends on
+UBI, which scales linearly. So overall UBI/UBIFS stack scales linearly.
+Nevertheless, UBI/UBIFS scales considerably better than JFFS2.
+
+The authors of UBIFS believe, that it is possible to develop UBI2 which
+would scale logarithmically as well. UBI2 would support the same API as UBI,
+but it would be binary incompatible to UBI. So UBIFS would not need to be
+changed to use UBI2
+
+
+Mount options
+=============
+
+(*) == default.
+
+norm_unmount (*) commit on unmount; the journal is committed
+ when the file-system is unmounted so that the
+ next mount does not have to replay the journal
+ and it becomes very fast;
+fast_unmount do not commit on unmount; this option makes
+ unmount faster, but the next mount slower
+ because of the need to replay the journal.
+
+
+Quick usage instructions
+========================
+
+The UBI volume to mount is specified using "ubiX_Y" or "ubiX:NAME" syntax,
+where "X" is UBI device number, "Y" is UBI volume number, and "NAME" is
+UBI volume name.
+
+Mount volume 0 on UBI device 0 to /mnt/ubifs:
+$ mount -t ubifs ubi0_0 /mnt/ubifs
+
+Mount "rootfs" volume of UBI device 0 to /mnt/ubifs ("rootfs" is volume
+name):
+$ mount -t ubifs ubi0:rootfs /mnt/ubifs
+
+The following is an example of the kernel boot arguments to attach mtd0
+to UBI and mount volume "rootfs":
+ubi.mtd=0 root=ubi0:rootfs rootfstype=ubifs
+
+
+Module Parameters for Debugging
+===============================
+
+When UBIFS has been compiled with debugging enabled, there are 3 module
+parameters that are available to control aspects of testing and debugging.
+The parameters are unsigned integers where each bit controls an option.
+The parameters are:
+
+debug_msgs Selects which debug messages to display, as follows:
+
+ Message Type Flag value
+
+ General messages 1
+ Journal messages 2
+ Mount messages 4
+ Commit messages 8
+ LEB search messages 16
+ Budgeting messages 32
+ Garbage collection messages 64
+ Tree Node Cache (TNC) messages 128
+ LEB properties (lprops) messages 256
+ Input/output messages 512
+ Log messages 1024
+ Scan messages 2048
+ Recovery messages 4096
+
+debug_chks Selects extra checks that UBIFS can do while running:
+
+ Check Flag value
+
+ General checks 1
+ Check Tree Node Cache (TNC) 2
+ Check indexing tree size 4
+ Check orphan area 8
+ Check old indexing tree 16
+ Check LEB properties (lprops) 32
+
+debug_tsts Selects a mode of testing, as follows:
+
+ Test mode Flag value
+
+ Force in-the-gaps method 2
+ Failure mode for recovery testing 4
+
+For example, set debug_msgs to 5 to display General messages and Mount
+messages.
+
+
+References
+==========
+
+UBIFS documentation and FAQ/HOWTO at the MTD web site:
+http://www.linux-mtd.infradead.org/doc/ubifs.html
+http://www.linux-mtd.infradead.org/faq/ubifs.html
diff --exclude=.git -urN linux-2.6.25.6/drivers/char/Kconfig avr32-2.6/drivers/char/Kconfig
--- linux-2.6.25.6/drivers/char/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/char/Kconfig 2008-06-12 15:09:40.071816052 +0200
@@ -706,7 +706,7 @@
config RTC
tristate "Enhanced Real Time Clock Support"
- depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC && !FRV && !ARM && !SUPERH && !S390
+ depends on !PPC && !PARISC && !IA64 && !M68K && !SPARC && !FRV && !ARM && !SUPERH && !S390 && !AVR32
---help---
If you say Y here and create a character special file /dev/rtc with
major number 10 and minor number 135 using mknod ("man mknod"), you
@@ -776,7 +776,7 @@
config GEN_RTC
tristate "Generic /dev/rtc emulation"
- depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH
+ depends on RTC!=y && !IA64 && !ARM && !M32R && !MIPS && !SPARC && !FRV && !S390 && !SUPERH && !AVR32
---help---
If you say Y here and create a character special file /dev/rtc with
major number 10 and minor number 135 using mknod ("man mknod"), you
diff --exclude=.git -urN linux-2.6.25.6/drivers/char/keyboard.c avr32-2.6/drivers/char/keyboard.c
--- linux-2.6.25.6/drivers/char/keyboard.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/char/keyboard.c 2008-06-12 15:09:40.243816452 +0200
@@ -1033,7 +1033,8 @@
#if defined(CONFIG_X86) || defined(CONFIG_IA64) || defined(CONFIG_ALPHA) ||\
defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) ||\
defined(CONFIG_PARISC) || defined(CONFIG_SUPERH) ||\
- (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC))
+ (defined(CONFIG_ARM) && defined(CONFIG_KEYBOARD_ATKBD) && !defined(CONFIG_ARCH_RPC)) ||\
+ defined(CONFIG_AVR32)
#define HW_RAW(dev) (test_bit(EV_MSC, dev->evbit) && test_bit(MSC_RAW, dev->mscbit) &&\
((dev)->id.bustype == BUS_I8042) && ((dev)->id.vendor == 0x0001) && ((dev)->id.product == 0x0001))
diff --exclude=.git -urN linux-2.6.25.6/drivers/clocksource/Makefile avr32-2.6/drivers/clocksource/Makefile
--- linux-2.6.25.6/drivers/clocksource/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/clocksource/Makefile 2008-06-12 15:03:58.475816394 +0200
@@ -1,3 +1,4 @@
+obj-$(CONFIG_ATMEL_TCB_CLKSRC) += tcb_clksrc.o
obj-$(CONFIG_X86_CYCLONE_TIMER) += cyclone.o
obj-$(CONFIG_X86_PM_TIMER) += acpi_pm.o
obj-$(CONFIG_SCx200HR_TIMER) += scx200_hrt.o
diff --exclude=.git -urN linux-2.6.25.6/drivers/clocksource/tcb_clksrc.c avr32-2.6/drivers/clocksource/tcb_clksrc.c
--- linux-2.6.25.6/drivers/clocksource/tcb_clksrc.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/clocksource/tcb_clksrc.c 2008-06-12 15:03:58.479814669 +0200
@@ -0,0 +1,302 @@
+#include <linux/init.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/ioport.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/atmel_tc.h>
+
+
+/*
+ * We're configured to use a specific TC block, one that's not hooked
+ * up to external hardware, to provide a time solution:
+ *
+ * - Two channels combine to create a free-running 32 bit counter
+ * with a base rate of 5+ MHz, packaged as a clocksource (with
+ * resolution better than 200 nsec).
+ *
+ * - The third channel may be used to provide a 16-bit clockevent
+ * source, used in either periodic or oneshot mode. This runs
+ * at 32 KiHZ, and can handle delays of up to two seconds.
+ *
+ * A boot clocksource and clockevent source are also currently needed,
+ * unless the relevant platforms (ARM/AT91, AVR32/AT32) are changed so
+ * this code can be used when init_timers() is called, well before most
+ * devices are set up. (Some low end AT91 parts, which can run uClinux,
+ * have only the timers in one TC block... they currently don't support
+ * the tclib code, because of that initialization issue.)
+ *
+ * REVISIT behavior during system suspend states... we should disable
+ * all clocks and save the power. Easily done for clockevent devices,
+ * but clocksources won't necessarily get the needed notifications.
+ * For deeper system sleep states, this will be mandatory...
+ */
+
+static void __iomem *tcaddr;
+
+static cycle_t tc_get_cycles(void)
+{
+ unsigned long flags;
+ u32 lower, upper;
+
+ raw_local_irq_save(flags);
+ do {
+ upper = __raw_readl(tcaddr + ATMEL_TC_REG(1, CV));
+ lower = __raw_readl(tcaddr + ATMEL_TC_REG(0, CV));
+ } while (upper != __raw_readl(tcaddr + ATMEL_TC_REG(1, CV)));
+
+ raw_local_irq_restore(flags);
+ return (upper << 16) | lower;
+}
+
+static struct clocksource clksrc = {
+ .name = "tcb_clksrc",
+ .rating = 200,
+ .read = tc_get_cycles,
+ .mask = CLOCKSOURCE_MASK(32),
+ .shift = 18,
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+#ifdef CONFIG_GENERIC_CLOCKEVENTS
+
+struct tc_clkevt_device {
+ struct clock_event_device clkevt;
+ struct clk *clk;
+ void __iomem *regs;
+};
+
+static struct tc_clkevt_device *to_tc_clkevt(struct clock_event_device *clkevt)
+{
+ return container_of(clkevt, struct tc_clkevt_device, clkevt);
+}
+
+/* For now, we always use the 32K clock ... this optimizes for NO_HZ,
+ * because using one of the divided clocks would usually mean the
+ * tick rate can never be less than several dozen Hz (vs 0.5 Hz).
+ *
+ * A divided clock could be good for high resolution timers, since
+ * 30.5 usec resolution can seem "low".
+ */
+static u32 timer_clock;
+
+static void tc_mode(enum clock_event_mode m, struct clock_event_device *d)
+{
+ struct tc_clkevt_device *tcd = to_tc_clkevt(d);
+ void __iomem *regs = tcd->regs;
+
+ if (tcd->clkevt.mode == CLOCK_EVT_MODE_PERIODIC
+ || tcd->clkevt.mode == CLOCK_EVT_MODE_ONESHOT) {
+ __raw_writel(0xff, regs + ATMEL_TC_REG(2, IDR));
+ __raw_writel(ATMEL_TC_CLKDIS, regs + ATMEL_TC_REG(2, CCR));
+ clk_disable(tcd->clk);
+ }
+
+ switch (m) {
+
+ /* By not making the gentime core emulate periodic mode on top
+ * of oneshot, we get lower overhead and improved accuracy.
+ */
+ case CLOCK_EVT_MODE_PERIODIC:
+ clk_enable(tcd->clk);
+
+ /* slow clock, count up to RC, then irq and restart */
+ __raw_writel(timer_clock
+ | ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP_AUTO,
+ regs + ATMEL_TC_REG(2, CMR));
+ __raw_writel((32768 + HZ/2) / HZ, tcaddr + ATMEL_TC_REG(2, RC));
+
+ /* Enable clock and interrupts on RC compare */
+ __raw_writel(ATMEL_TC_CPCS, regs + ATMEL_TC_REG(2, IER));
+
+ /* go go gadget! */
+ __raw_writel(ATMEL_TC_CLKEN | ATMEL_TC_SWTRG,
+ regs + ATMEL_TC_REG(2, CCR));
+ break;
+
+ case CLOCK_EVT_MODE_ONESHOT:
+ clk_enable(tcd->clk);
+
+ /* slow clock, count up to RC, then irq and stop */
+ __raw_writel(timer_clock | ATMEL_TC_CPCSTOP
+ | ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP_AUTO,
+ regs + ATMEL_TC_REG(2, CMR));
+ __raw_writel(ATMEL_TC_CPCS, regs + ATMEL_TC_REG(2, IER));
+
+ /* set_next_event() configures and starts the timer */
+ break;
+
+ default:
+ break;
+ }
+}
+
+static int tc_next_event(unsigned long delta, struct clock_event_device *d)
+{
+ __raw_writel(delta, tcaddr + ATMEL_TC_REG(2, RC));
+
+ /* go go gadget! */
+ __raw_writel(ATMEL_TC_CLKEN | ATMEL_TC_SWTRG,
+ tcaddr + ATMEL_TC_REG(2, CCR));
+ return 0;
+}
+
+static struct tc_clkevt_device clkevt = {
+ .clkevt = {
+ .name = "tc_clkevt",
+ .features = CLOCK_EVT_FEAT_PERIODIC
+ | CLOCK_EVT_FEAT_ONESHOT,
+ .shift = 32,
+ /* Should be lower than at91rm9200's system timer */
+ .rating = 125,
+ .cpumask = CPU_MASK_CPU0,
+ .set_next_event = tc_next_event,
+ .set_mode = tc_mode,
+ },
+};
+
+static irqreturn_t ch2_irq(int irq, void *handle)
+{
+ struct tc_clkevt_device *dev = handle;
+ unsigned int sr;
+
+ sr = __raw_readl(dev->regs + ATMEL_TC_REG(2, SR));
+ if (sr & ATMEL_TC_CPCS) {
+ dev->clkevt.event_handler(&dev->clkevt);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static struct irqaction tc_irqaction = {
+ .name = "tc_clkevt",
+ .flags = IRQF_TIMER | IRQF_DISABLED,
+ .handler = ch2_irq,
+};
+
+static void __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx)
+{
+ struct clk *t2_clk = tc->clk[2];
+ int irq = tc->irq[2];
+
+ clkevt.regs = tc->regs;
+ clkevt.clk = t2_clk;
+ tc_irqaction.dev_id = &clkevt;
+
+ timer_clock = clk32k_divisor_idx;
+
+ clkevt.clkevt.mult = div_sc(32768, NSEC_PER_SEC, clkevt.clkevt.shift);
+ clkevt.clkevt.max_delta_ns
+ = clockevent_delta2ns(0xffff, &clkevt.clkevt);
+ clkevt.clkevt.min_delta_ns = clockevent_delta2ns(1, &clkevt.clkevt) + 1;
+
+ setup_irq(irq, &tc_irqaction);
+
+ clockevents_register_device(&clkevt.clkevt);
+}
+
+#else /* !CONFIG_GENERIC_CLOCKEVENTS */
+
+static void __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx)
+{
+ /* NOTHING */
+}
+
+#endif
+
+static int __init tcb_clksrc_init(void)
+{
+ static char bootinfo[] __initdata
+ = KERN_DEBUG "%s: tc%d at %d.%03d MHz\n";
+
+ struct platform_device *pdev;
+ struct atmel_tc *tc;
+ struct clk *t0_clk;
+ u32 rate, divided_rate = 0;
+ int best_divisor_idx = -1;
+ int clk32k_divisor_idx = -1;
+ int i;
+
+ tc = atmel_tc_alloc(CONFIG_ATMEL_TCB_CLKSRC_BLOCK, clksrc.name);
+ if (!tc) {
+ pr_debug("can't alloc TC for clocksource\n");
+ return -ENODEV;
+ }
+ tcaddr = tc->regs;
+ pdev = tc->pdev;
+
+ t0_clk = tc->clk[0];
+ clk_enable(t0_clk);
+
+ /* How fast will we be counting? Pick something over 5 MHz. */
+ rate = (u32) clk_get_rate(t0_clk);
+ for (i = 0; i < 5; i++) {
+ unsigned divisor = atmel_tc_divisors[i];
+ unsigned tmp;
+
+ /* remember 32 KiHz clock for later */
+ if (!divisor) {
+ clk32k_divisor_idx = i;
+ continue;
+ }
+
+ tmp = rate / divisor;
+ pr_debug("TC: %u / %-3u [%d] --> %u\n", rate, divisor, i, tmp);
+ if (best_divisor_idx > 0) {
+ if (tmp < 5 * 1000 * 1000)
+ continue;
+ }
+ divided_rate = tmp;
+ best_divisor_idx = i;
+ }
+
+ clksrc.mult = clocksource_hz2mult(divided_rate, clksrc.shift);
+
+ printk(bootinfo, clksrc.name, CONFIG_ATMEL_TCB_CLKSRC_BLOCK,
+ divided_rate / 1000000,
+ ((divided_rate + 500000) % 1000000) / 1000);
+
+ /* tclib will give us three clocks no matter what the
+ * underlying platform supports.
+ */
+ clk_enable(tc->clk[1]);
+
+ /* channel 0: waveform mode, input mclk/8, clock TIOA0 on overflow */
+ __raw_writel(best_divisor_idx /* likely divide-by-8 */
+ | ATMEL_TC_WAVE
+ | ATMEL_TC_WAVESEL_UP /* free-run */
+ | ATMEL_TC_ACPA_SET /* TIOA0 rises at 0 */
+ | ATMEL_TC_ACPC_CLEAR, /* (duty cycle 50%) */
+ tcaddr + ATMEL_TC_REG(0, CMR));
+ __raw_writel(0x0000, tcaddr + ATMEL_TC_REG(0, RA));
+ __raw_writel(0x8000, tcaddr + ATMEL_TC_REG(0, RC));
+ __raw_writel(0xff, tcaddr + ATMEL_TC_REG(0, IDR)); /* no irqs */
+ __raw_writel(ATMEL_TC_CLKEN, tcaddr + ATMEL_TC_REG(0, CCR));
+
+ /* channel 1: waveform mode, input TIOA0 */
+ __raw_writel(ATMEL_TC_XC1 /* input: TIOA0 */
+ | ATMEL_TC_WAVE
+ | ATMEL_TC_WAVESEL_UP, /* free-run */
+ tcaddr + ATMEL_TC_REG(1, CMR));
+ __raw_writel(0xff, tcaddr + ATMEL_TC_REG(1, IDR)); /* no irqs */
+ __raw_writel(ATMEL_TC_CLKEN, tcaddr + ATMEL_TC_REG(1, CCR));
+
+ /* chain channel 0 to channel 1, then reset all the timers */
+ __raw_writel(ATMEL_TC_TC1XC1S_TIOA0, tcaddr + ATMEL_TC_BMR);
+ __raw_writel(ATMEL_TC_SYNC, tcaddr + ATMEL_TC_BCR);
+
+ /* and away we go! */
+ clocksource_register(&clksrc);
+
+ /* channel 2: periodic and oneshot timer support */
+ setup_clkevents(tc, clk32k_divisor_idx);
+
+ return 0;
+}
+arch_initcall(tcb_clksrc_init);
diff --exclude=.git -urN linux-2.6.25.6/drivers/i2c/busses/i2c-atmeltwi.c avr32-2.6/drivers/i2c/busses/i2c-atmeltwi.c
--- linux-2.6.25.6/drivers/i2c/busses/i2c-atmeltwi.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/i2c/busses/i2c-atmeltwi.c 2008-06-12 15:09:40.391816588 +0200
@@ -0,0 +1,436 @@
+/*
+ * i2c Support for Atmel's Two-Wire Interface (TWI)
+ *
+ * Based on the work of Copyright (C) 2004 Rick Bronson
+ * Converted to 2.6 by Andrew Victor <andrew at sanpeople.com>
+ * Ported to AVR32 and heavily modified by Espen Krangnes
+ * <ekrangnes at atmel.com>
+ *
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * Borrowed heavily from the original work by:
+ * Copyright (C) 2000 Philip Edelbrock <phil at stimpy.netroedge.com>
+ *
+ * Partialy rewriten by Karel Hojdar <cmkaho at seznam.cz>
+ * bugs removed, interrupt routine markedly rewritten
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+#undef VERBOSE_DEBUG
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/completion.h>
+#include <linux/io.h>
+
+#include "i2c-atmeltwi.h"
+
+static unsigned int baudrate = 100 * 1000;
+module_param(baudrate, uint, S_IRUGO);
+MODULE_PARM_DESC(baudrate, "The TWI baudrate");
+
+
+struct atmel_twi {
+ void __iomem *regs;
+ struct i2c_adapter adapter;
+ struct clk *pclk;
+ struct completion comp;
+ u32 mask;
+ u8 *buf;
+ u16 len;
+ u16 acks_left;
+ int status;
+ unsigned int irq;
+
+};
+#define to_atmel_twi(adap) container_of(adap, struct atmel_twi, adapter)
+
+/*
+ * (Re)Initialize the TWI hardware registers.
+ */
+static int twi_hwinit(struct atmel_twi *twi)
+{
+ unsigned long cdiv, ckdiv = 0;
+
+ /* REVISIT: wait till SCL is high before resetting; otherwise,
+ * some versions will wedge forever.
+ */
+
+ twi_writel(twi, IDR, ~0UL);
+ twi_writel(twi, CR, TWI_BIT(SWRST)); /*Reset peripheral*/
+ twi_readl(twi, SR);
+
+ cdiv = (clk_get_rate(twi->pclk) / (2 * baudrate)) - 4;
+
+ while (cdiv > 255) {
+ ckdiv++;
+ cdiv = cdiv >> 1;
+ }
+
+ /* REVISIT: there are various errata to consider re CDIV and CHDIV
+ * here, at least on at91 parts.
+ */
+
+ if (ckdiv > 7)
+ return -EINVAL;
+ else
+ twi_writel(twi, CWGR, TWI_BF(CKDIV, ckdiv)
+ | TWI_BF(CHDIV, cdiv)
+ | TWI_BF(CLDIV, cdiv));
+ return 0;
+}
+
+/*
+ * Waits for the i2c status register to set the specified bitmask
+ * Returns 0 if timed out ... ~100ms is much longer than the SMBus
+ * limit, but I2C has no limit at all.
+ */
+static int twi_complete(struct atmel_twi *twi, u32 mask)
+{
+ int timeout = msecs_to_jiffies(100);
+
+ mask |= TWI_BIT(TXCOMP);
+ twi->mask = mask | TWI_BIT(NACK) | TWI_BIT(OVRE);
+ init_completion(&twi->comp);
+
+ twi_writel(twi, IER, mask);
+
+ if (!wait_for_completion_timeout(&twi->comp, timeout)) {
+ /* RESET TWI interface */
+ twi_writel(twi, CR, TWI_BIT(SWRST));
+
+ /* Reinitialize TWI */
+ twi_hwinit(twi);
+
+ return -ETIMEDOUT;
+ }
+ return 0;
+}
+
+/*
+ * Generic i2c master transfer entrypoint.
+ */
+static int twi_xfer(struct i2c_adapter *adap, struct i2c_msg *pmsg, int num)
+{
+ struct atmel_twi *twi = to_atmel_twi(adap);
+ int i;
+
+ dev_dbg(&adap->dev, "twi_xfer: processing %d messages:\n", num);
+
+ twi->status = 0;
+ for (i = 0; i < num; i++, pmsg++) {
+ twi->len = pmsg->len;
+ twi->buf = pmsg->buf;
+ twi->acks_left = pmsg->len;
+ twi_writel(twi, MMR, TWI_BF(DADR, pmsg->addr) |
+ (pmsg->flags & I2C_M_RD ? TWI_BIT(MREAD) : 0));
+ twi_writel(twi, IADR, TWI_BF(IADR, pmsg->addr));
+
+ dev_dbg(&adap->dev,
+ "#%d: %s %d byte%s %s dev 0x%02x\n",
+ i,
+ pmsg->flags & I2C_M_RD ? "reading" : "writing",
+ pmsg->len,
+ pmsg->len > 1 ? "s" : "",
+ pmsg->flags & I2C_M_RD ? "from" : "to", pmsg->addr);
+
+ /* enable */
+ twi_writel(twi, CR, TWI_BIT(MSEN));
+
+ if (pmsg->flags & I2C_M_RD) {
+ /* cleanup after previous RX overruns */
+ while (twi_readl(twi, SR) & TWI_BIT(RXRDY))
+ twi_readl(twi, RHR);
+
+ if (twi->len == 1)
+ twi_writel(twi, CR,
+ TWI_BIT(START) | TWI_BIT(STOP));
+ else
+ twi_writel(twi, CR, TWI_BIT(START));
+
+ if (twi_complete(twi, TWI_BIT(RXRDY)) == -ETIMEDOUT) {
+ dev_dbg(&adap->dev, "RX[%d] timeout. "
+ "Stopped with %d bytes left\n",
+ i, twi->acks_left);
+ return -ETIMEDOUT;
+ }
+ } else {
+ twi_writel(twi, THR, twi->buf[0]);
+ twi->acks_left--;
+ /* REVISIT: some chips don't start automagically:
+ * twi_writel(twi, CR, TWI_BIT(START));
+ */
+ if (twi_complete(twi, TWI_BIT(TXRDY)) == -ETIMEDOUT) {
+ dev_dbg(&adap->dev, "TX[%d] timeout. "
+ "Stopped with %d bytes left\n",
+ i, twi->acks_left);
+ return -ETIMEDOUT;
+ }
+ /* REVISIT: an erratum workaround may be needed here;
+ * see sam9261 "STOP not generated" (START either).
+ */
+ }
+
+ /* Disable TWI interface */
+ twi_writel(twi, CR, TWI_BIT(MSDIS));
+
+ if (twi->status)
+ return twi->status;
+
+ /* WARNING: This driver lies about properly supporting
+ * repeated start, or it would *ALWAYS* return here. It
+ * has issued a STOP. Continuing is a false claim -- that
+ * a second (or third, etc.) message is part of the same
+ * "combined" (no STOPs between parts) message.
+ */
+
+ } /* end cur msg */
+
+ return i;
+}
+
+
+static irqreturn_t twi_interrupt(int irq, void *dev_id)
+{
+ struct atmel_twi *twi = dev_id;
+ int status = twi_readl(twi, SR);
+
+ /* Save state for later debug prints */
+ int old_status = status;
+
+ if (twi->mask & status) {
+
+ status &= twi->mask;
+
+ if (status & TWI_BIT(RXRDY)) {
+ if ((status & TWI_BIT(OVRE)) && twi->acks_left) {
+ /* Note weakness in fault reporting model:
+ * we can't say "the first N of these data
+ * bytes are valid".
+ */
+ dev_err(&twi->adapter.dev,
+ "OVERRUN RX! %04x, lost %d\n",
+ old_status, twi->acks_left);
+ twi->acks_left = 0;
+ twi_writel(twi, CR, TWI_BIT(STOP));
+ twi->status = -EOVERFLOW;
+ } else if (twi->acks_left > 0) {
+ twi->buf[twi->len - twi->acks_left] =
+ twi_readl(twi, RHR);
+ twi->acks_left--;
+ }
+ if (status & TWI_BIT(TXCOMP))
+ goto done;
+ if (twi->acks_left == 1)
+ twi_writel(twi, CR, TWI_BIT(STOP));
+
+ } else if (status & (TWI_BIT(NACK) | TWI_BIT(TXCOMP))) {
+ goto done;
+
+ } else if (status & TWI_BIT(TXRDY)) {
+ if (twi->acks_left > 0) {
+ twi_writel(twi, THR,
+ twi->buf[twi->len - twi->acks_left]);
+ twi->acks_left--;
+ } else
+ twi_writel(twi, CR, TWI_BIT(STOP));
+ }
+
+ if (twi->acks_left == 0)
+ twi_writel(twi, IDR, ~TWI_BIT(TXCOMP));
+ }
+
+ /* enabling this message helps trigger overruns/underruns ... */
+ dev_vdbg(&twi->adapter.dev,
+ "ISR: SR 0x%04X, mask 0x%04X, acks %i\n",
+ old_status,
+ twi->acks_left ? twi->mask : TWI_BIT(TXCOMP),
+ twi->acks_left);
+
+ return IRQ_HANDLED;
+
+done:
+ /* Note weak fault reporting model: we can't report how many
+ * bytes we sent before the NAK, or let upper layers choose
+ * whether to continue. The I2C stack doesn't allow that...
+ */
+ if (status & TWI_BIT(NACK)) {
+ dev_dbg(&twi->adapter.dev, "NACK received! %d to go\n",
+ twi->acks_left);
+ twi->status = -EPIPE;
+
+ /* TX underrun morphs automagically into a premature STOP;
+ * we'll probably observe UVRE even when it's not documented.
+ */
+ } else if (twi->acks_left && (twi->mask & TWI_BIT(TXRDY))) {
+ dev_err(&twi->adapter.dev, "UNDERRUN TX! %04x, %d to go\n",
+ old_status, twi->acks_left);
+ twi->status = -ENOSR;
+ }
+
+ twi_writel(twi, IDR, ~0UL);
+ complete(&twi->comp);
+
+ dev_dbg(&twi->adapter.dev, "ISR: SR 0x%04X, acks %i --> %d\n",
+ old_status, twi->acks_left, twi->status);
+
+ return IRQ_HANDLED;
+}
+
+
+/*
+ * Return list of supported functionality.
+ *
+ * NOTE: see warning above about repeated starts; this driver is falsely
+ * claiming to support "combined" transfers. The mid-message STOPs mean
+ * some slaves will never work with this driver. (Use i2c-gpio...)
+ */
+static u32 twi_func(struct i2c_adapter *adapter)
+{
+ return (I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL)
+ & ~I2C_FUNC_SMBUS_QUICK;
+}
+
+static struct i2c_algorithm twi_algorithm = {
+ .master_xfer = twi_xfer,
+ .functionality = twi_func,
+};
+
+/*
+ * Main initialization routine.
+ */
+static int __init twi_probe(struct platform_device *pdev)
+{
+ struct atmel_twi *twi;
+ struct resource *regs;
+ struct clk *pclk;
+ struct i2c_adapter *adapter;
+ int rc, irq;
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs)
+ return -ENXIO;
+
+ pclk = clk_get(&pdev->dev, "twi_pclk");
+ if (IS_ERR(pclk))
+ return PTR_ERR(pclk);
+ clk_enable(pclk);
+
+ rc = -ENOMEM;
+ twi = kzalloc(sizeof(struct atmel_twi), GFP_KERNEL);
+ if (!twi) {
+ dev_dbg(&pdev->dev, "can't allocate interface!\n");
+ goto err_alloc_twi;
+ }
+
+ twi->pclk = pclk;
+ twi->regs = ioremap(regs->start, regs->end - regs->start + 1);
+ if (!twi->regs)
+ goto err_ioremap;
+
+ irq = platform_get_irq(pdev, 0);
+ rc = request_irq(irq, twi_interrupt, 0, "twi", twi);
+ if (rc) {
+ dev_dbg(&pdev->dev, "can't bind irq!\n");
+ goto err_irq;
+ }
+ twi->irq = irq;
+
+ rc = twi_hwinit(twi);
+ if (rc) {
+ dev_err(&pdev->dev, "Unable to set baudrate\n");
+ goto err_hw_init;
+ }
+
+ adapter = &twi->adapter;
+ sprintf(adapter->name, "TWI");
+ adapter->algo = &twi_algorithm;
+ adapter->class = I2C_CLASS_ALL;
+ adapter->nr = pdev->id;
+ adapter->dev.parent = &pdev->dev;
+
+ platform_set_drvdata(pdev, twi);
+
+ rc = i2c_add_numbered_adapter(adapter);
+ if (rc) {
+ dev_dbg(&pdev->dev, "Adapter %s registration failed\n",
+ adapter->name);
+ goto err_register;
+ }
+
+ dev_info(&pdev->dev,
+ "Atmel TWI/I2C adapter (baudrate %dk) at 0x%08lx.\n",
+ baudrate/1000, (unsigned long)regs->start);
+
+ return 0;
+
+
+err_register:
+ platform_set_drvdata(pdev, NULL);
+
+err_hw_init:
+ free_irq(irq, twi);
+
+err_irq:
+ iounmap(twi->regs);
+
+err_ioremap:
+ kfree(twi);
+
+err_alloc_twi:
+ clk_disable(pclk);
+ clk_put(pclk);
+
+ return rc;
+}
+
+static int __exit twi_remove(struct platform_device *pdev)
+{
+ struct atmel_twi *twi = platform_get_drvdata(pdev);
+ int res;
+
+ platform_set_drvdata(pdev, NULL);
+ res = i2c_del_adapter(&twi->adapter);
+ twi_writel(twi, CR, TWI_BIT(MSDIS));
+ iounmap(twi->regs);
+ clk_disable(twi->pclk);
+ clk_put(twi->pclk);
+ free_irq(twi->irq, twi);
+ kfree(twi);
+
+ return res;
+}
+
+static struct platform_driver twi_driver = {
+ .remove = __exit_p(twi_remove),
+ .driver = {
+ .name = "atmel_twi",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init atmel_twi_init(void)
+{
+ return platform_driver_probe(&twi_driver, twi_probe);
+}
+
+static void __exit atmel_twi_exit(void)
+{
+ platform_driver_unregister(&twi_driver);
+}
+
+module_init(atmel_twi_init);
+module_exit(atmel_twi_exit);
+
+MODULE_AUTHOR("Espen Krangnes");
+MODULE_DESCRIPTION("I2C driver for Atmel TWI");
+MODULE_LICENSE("GPL");
diff --exclude=.git -urN linux-2.6.25.6/drivers/i2c/busses/i2c-atmeltwi.h avr32-2.6/drivers/i2c/busses/i2c-atmeltwi.h
--- linux-2.6.25.6/drivers/i2c/busses/i2c-atmeltwi.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/i2c/busses/i2c-atmeltwi.h 2008-06-12 15:09:40.391816588 +0200
@@ -0,0 +1,117 @@
+/*
+ * Register definitions for the Atmel Two-Wire Interface
+ */
+
+#ifndef __ATMELTWI_H__
+#define __ATMELTWI_H__
+
+/* TWI register offsets */
+#define TWI_CR 0x0000
+#define TWI_MMR 0x0004
+#define TWI_SMR 0x0008
+#define TWI_IADR 0x000c
+#define TWI_CWGR 0x0010
+#define TWI_SR 0x0020
+#define TWI_IER 0x0024
+#define TWI_IDR 0x0028
+#define TWI_IMR 0x002c
+#define TWI_RHR 0x0030
+#define TWI_THR 0x0034
+
+/* Bitfields in CR */
+#define TWI_START_OFFSET 0
+#define TWI_START_SIZE 1
+#define TWI_STOP_OFFSET 1
+#define TWI_STOP_SIZE 1
+#define TWI_MSEN_OFFSET 2
+#define TWI_MSEN_SIZE 1
+#define TWI_MSDIS_OFFSET 3
+#define TWI_MSDIS_SIZE 1
+#define TWI_SVEN_OFFSET 4
+#define TWI_SVEN_SIZE 1
+#define TWI_SVDIS_OFFSET 5
+#define TWI_SVDIS_SIZE 1
+#define TWI_SWRST_OFFSET 7
+#define TWI_SWRST_SIZE 1
+
+/* Bitfields in MMR */
+#define TWI_IADRSZ_OFFSET 8
+#define TWI_IADRSZ_SIZE 2
+#define TWI_MREAD_OFFSET 12
+#define TWI_MREAD_SIZE 1
+#define TWI_DADR_OFFSET 16
+#define TWI_DADR_SIZE 7
+
+/* Bitfields in SMR */
+#define TWI_SADR_OFFSET 16
+#define TWI_SADR_SIZE 7
+
+/* Bitfields in IADR */
+#define TWI_IADR_OFFSET 0
+#define TWI_IADR_SIZE 24
+
+/* Bitfields in CWGR */
+#define TWI_CLDIV_OFFSET 0
+#define TWI_CLDIV_SIZE 8
+#define TWI_CHDIV_OFFSET 8
+#define TWI_CHDIV_SIZE 8
+#define TWI_CKDIV_OFFSET 16
+#define TWI_CKDIV_SIZE 3
+
+/* Bitfields in SR */
+#define TWI_TXCOMP_OFFSET 0
+#define TWI_TXCOMP_SIZE 1
+#define TWI_RXRDY_OFFSET 1
+#define TWI_RXRDY_SIZE 1
+#define TWI_TXRDY_OFFSET 2
+#define TWI_TXRDY_SIZE 1
+#define TWI_SVDIR_OFFSET 3
+#define TWI_SVDIR_SIZE 1
+#define TWI_SVACC_OFFSET 4
+#define TWI_SVACC_SIZE 1
+#define TWI_GCACC_OFFSET 5
+#define TWI_GCACC_SIZE 1
+#define TWI_OVRE_OFFSET 6
+#define TWI_OVRE_SIZE 1
+#define TWI_UNRE_OFFSET 7
+#define TWI_UNRE_SIZE 1
+#define TWI_NACK_OFFSET 8
+#define TWI_NACK_SIZE 1
+#define TWI_ARBLST_OFFSET 9
+#define TWI_ARBLST_SIZE 1
+
+/* Bitfields in RHR */
+#define TWI_RXDATA_OFFSET 0
+#define TWI_RXDATA_SIZE 8
+
+/* Bitfields in THR */
+#define TWI_TXDATA_OFFSET 0
+#define TWI_TXDATA_SIZE 8
+
+/* Constants for IADRSZ */
+#define TWI_IADRSZ_NO_ADDR 0
+#define TWI_IADRSZ_ONE_BYTE 1
+#define TWI_IADRSZ_TWO_BYTES 2
+#define TWI_IADRSZ_THREE_BYTES 3
+
+/* Bit manipulation macros */
+#define TWI_BIT(name) \
+ (1 << TWI_##name##_OFFSET)
+#define TWI_BF(name, value) \
+ (((value) & ((1 << TWI_##name##_SIZE) - 1)) \
+ << TWI_##name##_OFFSET)
+#define TWI_BFEXT(name, value) \
+ (((value) >> TWI_##name##_OFFSET) \
+ & ((1 << TWI_##name##_SIZE) - 1))
+#define TWI_BFINS(name, value, old) \
+ (((old) & ~(((1 << TWI_##name##_SIZE) - 1) \
+ << TWI_##name##_OFFSET)) \
+ | TWI_BF(name, (value)))
+
+/* Register access macros */
+#define twi_readl(port, reg) \
+ __raw_readl((port)->regs + TWI_##reg)
+#define twi_writel(port, reg, value) \
+ __raw_writel((value), (port)->regs + TWI_##reg)
+
+#endif /* __ATMELTWI_H__ */
diff --exclude=.git -urN linux-2.6.25.6/drivers/i2c/busses/Kconfig avr32-2.6/drivers/i2c/busses/Kconfig
--- linux-2.6.25.6/drivers/i2c/busses/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/i2c/busses/Kconfig 2008-06-12 15:09:40.383816128 +0200
@@ -88,6 +88,14 @@
to support combined I2C messages. Use the i2c-gpio driver
unless your system can cope with those limitations.
+config I2C_ATMELTWI
+ tristate "Atmel Two-Wire Interface (TWI)"
+ depends on I2C && (ARCH_AT91 || PLATFORM_AT32AP)
+ help
+ Atmel on-chip TWI controller. Say Y if you have an AT32 or
+ AT91-based device and want to use its built-in TWI
+ functionality.
+
config I2C_AU1550
tristate "Au1550/Au1200 SMBus interface"
depends on SOC_AU1550 || SOC_AU1200
diff --exclude=.git -urN linux-2.6.25.6/drivers/i2c/busses/Makefile avr32-2.6/drivers/i2c/busses/Makefile
--- linux-2.6.25.6/drivers/i2c/busses/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/i2c/busses/Makefile 2008-06-12 15:09:40.383816128 +0200
@@ -52,6 +52,7 @@
obj-$(CONFIG_I2C_VOODOO3) += i2c-voodoo3.o
obj-$(CONFIG_SCx200_ACB) += scx200_acb.o
obj-$(CONFIG_SCx200_I2C) += scx200_i2c.o
+obj-$(CONFIG_I2C_ATMELTWI) += i2c-atmeltwi.o
ifeq ($(CONFIG_I2C_DEBUG_BUS),y)
EXTRA_CFLAGS += -DDEBUG
diff --exclude=.git -urN linux-2.6.25.6/drivers/input/serio/at32psif.c avr32-2.6/drivers/input/serio/at32psif.c
--- linux-2.6.25.6/drivers/input/serio/at32psif.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/input/serio/at32psif.c 2008-06-12 15:09:40.619816021 +0200
@@ -0,0 +1,351 @@
+/*
+ * Copyright (C) 2007 Atmel Corporation
+ *
+ * Driver for the AT32AP700X PS/2 controller (PSIF).
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/serio.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+
+#include "at32psif.h"
+
+#define PSIF_BUF_SIZE 16
+
+#define ring_is_empty(_psif) (_psif->head == _psif->tail)
+#define ring_next_head(_psif) ((_psif->head + 1) & (PSIF_BUF_SIZE - 1))
+#define ring_next_tail(_psif) ((_psif->tail + 1) & (PSIF_BUF_SIZE - 1))
+
+struct psif {
+ struct platform_device *pdev;
+ struct clk *pclk;
+ struct serio *io;
+ struct timer_list tx_timer;
+ void __iomem *regs;
+ unsigned int irq;
+ unsigned int open;
+ /* Prevent concurrent writes to circular buffer. */
+ spinlock_t lock;
+ unsigned int head;
+ unsigned int tail;
+ unsigned char buffer[PSIF_BUF_SIZE];
+};
+
+static irqreturn_t psif_interrupt(int irq, void *_ptr)
+{
+ struct psif *psif = _ptr;
+ int retval = IRQ_NONE;
+ unsigned int io_flags = 0;
+ unsigned long status;
+
+ status = psif_readl(psif, SR);
+
+ if (status & PSIF_BIT(RXRDY)) {
+ unsigned char val = (unsigned char) psif_readl(psif, RHR);
+
+ if (status & PSIF_BIT(PARITY))
+ io_flags |= SERIO_PARITY;
+ if (status & PSIF_BIT(OVRUN))
+ dev_err(&psif->pdev->dev, "overrun read error\n");
+
+ serio_interrupt(psif->io, val, io_flags);
+
+ retval = IRQ_HANDLED;
+ }
+
+ spin_lock(&psif->lock);
+
+ if (status & PSIF_BIT(TXEMPTY)) {
+ if (status & PSIF_BIT(NACK))
+ dev_err(&psif->pdev->dev, "NACK error\n");
+
+ psif_writel(psif, IDR, PSIF_BIT(TXEMPTY));
+
+ if (!ring_is_empty(psif))
+ mod_timer(&psif->tx_timer,
+ jiffies + msecs_to_jiffies(1));
+
+ retval = IRQ_HANDLED;
+ }
+
+ spin_unlock(&psif->lock);
+
+ return retval;
+}
+
+static void psif_transmit_data(unsigned long data)
+{
+ struct psif *psif = (struct psif *)data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&psif->lock, flags);
+
+ psif_writel(psif, THR, psif->buffer[psif->tail]);
+ psif->tail = ring_next_tail(psif);
+
+ if (!ring_is_empty(psif))
+ psif_writel(psif, IER, PSIF_BIT(TXEMPTY));
+
+ spin_unlock_irqrestore(&psif->lock, flags);
+}
+
+static int psif_write(struct serio *io, unsigned char val)
+{
+ struct psif *psif = io->port_data;
+ unsigned long flags;
+ unsigned int head;
+
+ spin_lock_irqsave(&psif->lock, flags);
+
+ head = ring_next_head(psif);
+
+ if (head != psif->tail) {
+ psif->buffer[psif->head] = val;
+ psif->head = head;
+ } else {
+ dev_err(&psif->pdev->dev, "underrun write error\n");
+ }
+
+ spin_unlock_irqrestore(&psif->lock, flags);
+
+ /* Make sure TXEMPTY interrupt is enabled. */
+ psif_writel(psif, IER, PSIF_BIT(TXEMPTY));
+
+ return 0;
+}
+
+static int psif_open(struct serio *io)
+{
+ struct psif *psif = io->port_data;
+ int retval;
+
+ retval = clk_enable(psif->pclk);
+ if (retval)
+ goto out;
+
+ psif_writel(psif, CR, PSIF_BIT(CR_TXEN) | PSIF_BIT(CR_RXEN));
+ psif_writel(psif, IER, PSIF_BIT(RXRDY));
+
+ psif->open = 1;
+out:
+ return retval;
+}
+
+static void psif_close(struct serio *io)
+{
+ struct psif *psif = io->port_data;
+
+ psif->open = 0;
+
+ psif_writel(psif, IDR, ~0UL);
+ psif_writel(psif, CR, PSIF_BIT(CR_TXDIS) | PSIF_BIT(CR_RXDIS));
+
+ clk_disable(psif->pclk);
+}
+
+static void psif_set_prescaler(struct psif *psif)
+{
+ unsigned long prscv;
+ unsigned long rate = clk_get_rate(psif->pclk);
+
+ /* PRSCV = Pulse length (100 us) * PSIF module frequency. */
+ prscv = 100 * (rate / 1000000UL);
+
+ if (prscv > ((1<<PSIF_PSR_PRSCV_SIZE) - 1)) {
+ prscv = (1<<PSIF_PSR_PRSCV_SIZE) - 1;
+ dev_dbg(&psif->pdev->dev, "pclk too fast, "
+ "prescaler set to max\n");
+ }
+
+ clk_enable(psif->pclk);
+ psif_writel(psif, PSR, prscv);
+ clk_disable(psif->pclk);
+}
+
+static int __init psif_probe(struct platform_device *pdev)
+{
+ struct resource *regs;
+ struct psif *psif;
+ struct serio *io;
+ struct clk *pclk;
+ int irq;
+ int ret;
+
+ psif = kzalloc(sizeof(struct psif), GFP_KERNEL);
+ if (!psif) {
+ dev_dbg(&pdev->dev, "out of memory\n");
+ ret = -ENOMEM;
+ goto out;
+ }
+ psif->pdev = pdev;
+
+ io = kzalloc(sizeof(struct serio), GFP_KERNEL);
+ if (!io) {
+ dev_dbg(&pdev->dev, "out of memory\n");
+ ret = -ENOMEM;
+ goto out_free_psif;
+ }
+ psif->io = io;
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs) {
+ dev_dbg(&pdev->dev, "no mmio resources defined\n");
+ ret = -ENOMEM;
+ goto out_free_io;
+ }
+
+ psif->regs = ioremap(regs->start, regs->end - regs->start + 1);
+ if (!psif->regs) {
+ ret = -ENOMEM;
+ dev_dbg(&pdev->dev, "could not map I/O memory\n");
+ goto out_free_io;
+ }
+
+ pclk = clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(pclk)) {
+ dev_dbg(&pdev->dev, "could not get peripheral clock\n");
+ ret = PTR_ERR(pclk);
+ goto out_iounmap;
+ }
+ psif->pclk = pclk;
+
+ /* Reset the PSIF to enter at a known state. */
+ ret = clk_enable(pclk);
+ if (ret) {
+ dev_dbg(&pdev->dev, "could not enable pclk\n");
+ goto out_put_clk;
+ }
+ psif_writel(psif, CR, PSIF_BIT(CR_SWRST));
+ clk_disable(pclk);
+
+ setup_timer(&psif->tx_timer, psif_transmit_data, (unsigned long)psif);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_dbg(&pdev->dev, "could not get irq\n");
+ ret = -ENXIO;
+ goto out_put_clk;
+ }
+ ret = request_irq(irq, psif_interrupt, IRQF_SHARED, "at32psif", psif);
+ if (ret) {
+ dev_dbg(&pdev->dev, "could not request irq %d\n", irq);
+ goto out_put_clk;
+ }
+ psif->irq = irq;
+
+ io->id.type = SERIO_8042;
+ io->write = psif_write;
+ io->open = psif_open;
+ io->close = psif_close;
+ strlcpy(io->name, pdev->dev.bus_id, sizeof(io->name));
+ strlcpy(io->phys, pdev->dev.bus_id, sizeof(io->phys));
+ io->port_data = psif;
+ io->dev.parent = &pdev->dev;
+
+ psif_set_prescaler(psif);
+
+ spin_lock_init(&psif->lock);
+ serio_register_port(psif->io);
+ platform_set_drvdata(pdev, psif);
+
+ dev_info(&pdev->dev, "Atmel AVR32 PSIF PS/2 driver on 0x%08x irq %d\n",
+ (int)psif->regs, psif->irq);
+
+ return 0;
+
+out_put_clk:
+ clk_put(psif->pclk);
+out_iounmap:
+ iounmap(psif->regs);
+out_free_io:
+ kfree(io);
+out_free_psif:
+ kfree(psif);
+out:
+ return ret;
+}
+
+static int __exit psif_remove(struct platform_device *pdev)
+{
+ struct psif *psif = platform_get_drvdata(pdev);
+
+ psif_writel(psif, IDR, ~0UL);
+ psif_writel(psif, CR, PSIF_BIT(CR_TXDIS) | PSIF_BIT(CR_RXDIS));
+
+ serio_unregister_port(psif->io);
+ iounmap(psif->regs);
+ free_irq(psif->irq, psif);
+ clk_put(psif->pclk);
+ kfree(psif);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int psif_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct psif *psif = platform_get_drvdata(pdev);
+
+ if (psif->open) {
+ psif_writel(psif, CR, PSIF_BIT(CR_RXDIS) | PSIF_BIT(CR_TXDIS));
+ clk_disable(psif->pclk);
+ }
+
+ return 0;
+}
+
+static int psif_resume(struct platform_device *pdev)
+{
+ struct psif *psif = platform_get_drvdata(pdev);
+
+ if (psif->open) {
+ clk_enable(psif->pclk);
+ psif_set_prescaler(psif);
+ psif_writel(psif, CR, PSIF_BIT(CR_RXEN) | PSIF_BIT(CR_TXEN));
+ }
+
+ return 0;
+}
+#else
+#define psif_suspend NULL
+#define psif_resume NULL
+#endif
+
+static struct platform_driver psif_driver = {
+ .remove = __exit_p(psif_remove),
+ .driver = {
+ .name = "atmel_psif",
+ },
+ .suspend = psif_suspend,
+ .resume = psif_resume,
+};
+
+static int __init psif_init(void)
+{
+ return platform_driver_probe(&psif_driver, psif_probe);
+}
+
+static void __exit psif_exit(void)
+{
+ platform_driver_unregister(&psif_driver);
+}
+
+module_init(psif_init);
+module_exit(psif_exit);
+
+MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
+MODULE_DESCRIPTION("Atmel AVR32 PSIF PS/2 driver");
+MODULE_LICENSE("GPL");
diff --exclude=.git -urN linux-2.6.25.6/drivers/input/serio/at32psif.h avr32-2.6/drivers/input/serio/at32psif.h
--- linux-2.6.25.6/drivers/input/serio/at32psif.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/input/serio/at32psif.h 2008-06-12 15:09:40.619816021 +0200
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2007 Atmel Corporation
+ *
+ * Driver for the AT32AP700X PS/2 controller (PSIF).
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#ifndef _AT32PSIF_H
+#define _AT32PSIF_H
+
+/* PSIF register offsets */
+#define PSIF_CR 0x00
+#define PSIF_RHR 0x04
+#define PSIF_THR 0x08
+#define PSIF_SR 0x10
+#define PSIF_IER 0x14
+#define PSIF_IDR 0x18
+#define PSIF_IMR 0x1c
+#define PSIF_PSR 0x24
+
+/* Bitfields in control register. */
+#define PSIF_CR_RXDIS_OFFSET 1
+#define PSIF_CR_RXDIS_SIZE 1
+#define PSIF_CR_RXEN_OFFSET 0
+#define PSIF_CR_RXEN_SIZE 1
+#define PSIF_CR_SWRST_OFFSET 15
+#define PSIF_CR_SWRST_SIZE 1
+#define PSIF_CR_TXDIS_OFFSET 9
+#define PSIF_CR_TXDIS_SIZE 1
+#define PSIF_CR_TXEN_OFFSET 8
+#define PSIF_CR_TXEN_SIZE 1
+
+/* Bitfields in interrupt disable, enable, mask and status register. */
+#define PSIF_NACK_OFFSET 8
+#define PSIF_NACK_SIZE 1
+#define PSIF_OVRUN_OFFSET 5
+#define PSIF_OVRUN_SIZE 1
+#define PSIF_PARITY_OFFSET 9
+#define PSIF_PARITY_SIZE 1
+#define PSIF_RXRDY_OFFSET 4
+#define PSIF_RXRDY_SIZE 1
+#define PSIF_TXEMPTY_OFFSET 1
+#define PSIF_TXEMPTY_SIZE 1
+#define PSIF_TXRDY_OFFSET 0
+#define PSIF_TXRDY_SIZE 1
+
+/* Bitfields in prescale register. */
+#define PSIF_PSR_PRSCV_OFFSET 0
+#define PSIF_PSR_PRSCV_SIZE 12
+
+/* Bitfields in receive hold register. */
+#define PSIF_RHR_RXDATA_OFFSET 0
+#define PSIF_RHR_RXDATA_SIZE 8
+
+/* Bitfields in transmit hold register. */
+#define PSIF_THR_TXDATA_OFFSET 0
+#define PSIF_THR_TXDATA_SIZE 8
+
+/* Bit manipulation macros */
+#define PSIF_BIT(name) \
+ (1 << PSIF_##name##_OFFSET)
+#define PSIF_BF(name, value) \
+ (((value) & ((1 << PSIF_##name##_SIZE) - 1)) \
+ << PSIF_##name##_OFFSET)
+#define PSIF_BFEXT(name, value)\
+ (((value) >> PSIF_##name##_OFFSET) \
+ & ((1 << PSIF_##name##_SIZE) - 1))
+#define PSIF_BFINS(name, value, old) \
+ (((old) & ~(((1 << PSIF_##name##_SIZE) - 1) \
+ << PSIF_##name##_OFFSET)) \
+ | PSIF_BF(name, value))
+
+/* Register access macros */
+#define psif_readl(port, reg) \
+ __raw_readl((port)->regs + PSIF_##reg)
+#define psif_writel(port, reg, value) \
+ __raw_writel((value), (port)->regs + PSIF_##reg)
+
+#endif /* _AT32PSIF_H */
diff --exclude=.git -urN linux-2.6.25.6/drivers/input/serio/Kconfig avr32-2.6/drivers/input/serio/Kconfig
--- linux-2.6.25.6/drivers/input/serio/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/input/serio/Kconfig 2008-06-12 15:09:40.615815791 +0200
@@ -88,6 +88,17 @@
To compile this driver as a module, choose M here: the
module will be called rpckbd.
+config SERIO_AT32PSIF
+ tristate "AVR32 PSIF PS/2 keyboard and mouse controller"
+ depends on AVR32
+ default n
+ help
+ Say Y here if you want to use the PSIF peripheral on AVR32 devices
+ and connect a PS/2 keyboard and/or mouse to it.
+
+ To compile this driver as a module, choose M here: the module will
+ be called at32psif.
+
config SERIO_AMBAKMI
tristate "AMBA KMI keyboard controller"
depends on ARM_AMBA
diff --exclude=.git -urN linux-2.6.25.6/drivers/input/serio/Makefile avr32-2.6/drivers/input/serio/Makefile
--- linux-2.6.25.6/drivers/input/serio/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/input/serio/Makefile 2008-06-12 15:03:58.919815686 +0200
@@ -12,6 +12,7 @@
obj-$(CONFIG_SERIO_RPCKBD) += rpckbd.o
obj-$(CONFIG_SERIO_SA1111) += sa1111ps2.o
obj-$(CONFIG_SERIO_AMBAKMI) += ambakmi.o
+obj-$(CONFIG_SERIO_AT32PSIF) += at32psif.o
obj-$(CONFIG_SERIO_Q40KBD) += q40kbd.o
obj-$(CONFIG_SERIO_GSCPS2) += gscps2.o
obj-$(CONFIG_HP_SDC) += hp_sdc.o
diff --exclude=.git -urN linux-2.6.25.6/drivers/misc/atmel_tclib.c avr32-2.6/drivers/misc/atmel_tclib.c
--- linux-2.6.25.6/drivers/misc/atmel_tclib.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/misc/atmel_tclib.c 2008-06-12 15:03:59.515815344 +0200
@@ -0,0 +1,161 @@
+#include <linux/atmel_tc.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+
+/* Number of bytes to reserve for the iomem resource */
+#define ATMEL_TC_IOMEM_SIZE 256
+
+
+/*
+ * This is a thin library to solve the problem of how to portably allocate
+ * one of the TC blocks. For simplicity, it doesn't currently expect to
+ * share individual timers between different drivers.
+ */
+
+#if defined(CONFIG_AVR32)
+/* AVR32 has these divide PBB */
+const u8 atmel_tc_divisors[5] = { 0, 4, 8, 16, 32, };
+EXPORT_SYMBOL(atmel_tc_divisors);
+
+#elif defined(CONFIG_ARCH_AT91)
+/* AT91 has these divide MCK */
+const u8 atmel_tc_divisors[5] = { 2, 8, 32, 128, 0, };
+EXPORT_SYMBOL(atmel_tc_divisors);
+
+#endif
+
+static DEFINE_SPINLOCK(tc_list_lock);
+static LIST_HEAD(tc_list);
+
+/**
+ * atmel_tc_alloc - allocate a specified TC block
+ * @block: which block to allocate
+ * @name: name to be associated with the iomem resource
+ *
+ * Caller allocates a block. If it is available, a pointer to a
+ * pre-initialized struct atmel_tc is returned. The caller can access
+ * the registers directly through the "regs" field.
+ */
+struct atmel_tc *atmel_tc_alloc(unsigned block, const char *name)
+{
+ struct atmel_tc *tc;
+ struct platform_device *pdev = NULL;
+ struct resource *r;
+
+ spin_lock(&tc_list_lock);
+ list_for_each_entry(tc, &tc_list, node) {
+ if (tc->pdev->id == block) {
+ pdev = tc->pdev;
+ break;
+ }
+ }
+
+ if (!pdev || tc->iomem)
+ goto fail;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ r = request_mem_region(r->start, ATMEL_TC_IOMEM_SIZE, name);
+ if (!r)
+ goto fail;
+
+ tc->regs = ioremap(r->start, ATMEL_TC_IOMEM_SIZE);
+ if (!tc->regs)
+ goto fail_ioremap;
+
+ tc->iomem = r;
+
+out:
+ spin_unlock(&tc_list_lock);
+ return tc;
+
+fail_ioremap:
+ release_resource(r);
+fail:
+ tc = NULL;
+ goto out;
+}
+EXPORT_SYMBOL_GPL(atmel_tc_alloc);
+
+/**
+ * atmel_tc_free - release a specified TC block
+ * @tc: Timer/counter block that was returned by atmel_tc_alloc()
+ *
+ * This reverses the effect of atmel_tc_alloc(), unmapping the I/O
+ * registers, invalidating the resource returned by that routine and
+ * making the TC available to other drivers.
+ */
+void atmel_tc_free(struct atmel_tc *tc)
+{
+ spin_lock(&tc_list_lock);
+ if (tc->regs) {
+ iounmap(tc->regs);
+ release_resource(tc->iomem);
+ tc->regs = NULL;
+ tc->iomem = NULL;
+ }
+ spin_unlock(&tc_list_lock);
+}
+EXPORT_SYMBOL_GPL(atmel_tc_free);
+
+static int __init tc_probe(struct platform_device *pdev)
+{
+ struct atmel_tc *tc;
+ struct clk *clk;
+ int irq;
+
+ if (!platform_get_resource(pdev, IORESOURCE_MEM, 0))
+ return -EINVAL;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return -EINVAL;
+
+ tc = kzalloc(sizeof(struct atmel_tc), GFP_KERNEL);
+ if (!tc)
+ return -ENOMEM;
+
+ tc->pdev = pdev;
+
+ clk = clk_get(&pdev->dev, "t0_clk");
+ if (IS_ERR(clk)) {
+ kfree(tc);
+ return -EINVAL;
+ }
+
+ tc->clk[0] = clk;
+ tc->clk[1] = clk_get(&pdev->dev, "t1_clk");
+ if (IS_ERR(tc->clk[1]))
+ tc->clk[1] = clk;
+ tc->clk[2] = clk_get(&pdev->dev, "t2_clk");
+ if (IS_ERR(tc->clk[2]))
+ tc->clk[2] = clk;
+
+ tc->irq[0] = irq;
+ tc->irq[1] = platform_get_irq(pdev, 1);
+ if (tc->irq[1] < 0)
+ tc->irq[1] = irq;
+ tc->irq[2] = platform_get_irq(pdev, 2);
+ if (tc->irq[2] < 0)
+ tc->irq[2] = irq;
+
+ spin_lock(&tc_list_lock);
+ list_add_tail(&tc->node, &tc_list);
+ spin_unlock(&tc_list_lock);
+
+ return 0;
+}
+
+static struct platform_driver tc_driver = {
+ .driver.name = "atmel_tcb",
+};
+
+static int __init tc_init(void)
+{
+ return platform_driver_probe(&tc_driver, tc_probe);
+}
+arch_initcall(tc_init);
diff --exclude=.git -urN linux-2.6.25.6/drivers/misc/Kconfig avr32-2.6/drivers/misc/Kconfig
--- linux-2.6.25.6/drivers/misc/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/misc/Kconfig 2008-06-12 15:09:41.067816939 +0200
@@ -22,6 +22,39 @@
purposes including software controlled power-efficent backlights
on LCD displays, motor control, and waveform generation.
+config ATMEL_TCLIB
+ bool "Atmel AT32/AT91 Timer/Counter Library"
+ depends on (AVR32 || ARCH_AT91)
+ help
+ Select this if you want a library to allocate the Timer/Counter
+ blocks found on many Atmel processors. This facilitates using
+ these blocks by different drivers despite processor differences.
+
+config ATMEL_TCB_CLKSRC
+ bool "TC Block Clocksource"
+ depends on ATMEL_TCLIB && GENERIC_TIME
+ default y
+ help
+ Select this to get a high precision clocksource based on a
+ TC block with a 5+ MHz base clock rate. Two timer channels
+ are combined to make a single 32-bit timer.
+
+ When GENERIC_CLOCKEVENTS is defined, the third timer channel
+ may be used as a clock event device supporting oneshot mode
+ (delays of up to two seconds) based on the 32 KiHz clock.
+
+config ATMEL_TCB_CLKSRC_BLOCK
+ int
+ depends on ATMEL_TCB_CLKSRC
+ prompt "TC Block" if ARCH_AT91RM9200 || ARCH_AT91SAM9260 || CPU_AT32AP700X
+ default 0
+ range 0 1
+ help
+ Some chips provide more than one TC block, so you have the
+ choice of which one to use for the clock framework. The other
+ TC can be used for other purposes, such as PWM generation and
+ interval timing.
+
config IBM_ASM
tristate "Device driver for IBM RSA service processor"
depends on X86 && PCI && INPUT && EXPERIMENTAL
diff --exclude=.git -urN linux-2.6.25.6/drivers/misc/Makefile avr32-2.6/drivers/misc/Makefile
--- linux-2.6.25.6/drivers/misc/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/misc/Makefile 2008-06-12 15:09:41.067816939 +0200
@@ -10,6 +10,7 @@
obj-$(CONFIG_ASUS_LAPTOP) += asus-laptop.o
obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o
obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o
+obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o
obj-$(CONFIG_TC1100_WMI) += tc1100-wmi.o
obj-$(CONFIG_LKDTM) += lkdtm.o
obj-$(CONFIG_TIFM_CORE) += tifm_core.o
diff --exclude=.git -urN linux-2.6.25.6/drivers/mmc/host/atmel-mci.c avr32-2.6/drivers/mmc/host/atmel-mci.c
--- linux-2.6.25.6/drivers/mmc/host/atmel-mci.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/mmc/host/atmel-mci.c 2008-06-12 15:09:41.083816184 +0200
@@ -0,0 +1,1220 @@
+/*
+ * Atmel MultiMedia Card Interface driver
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/blkdev.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <linux/mmc/host.h>
+
+#include <asm/dma-controller.h>
+#include <asm/io.h>
+#include <asm/arch/board.h>
+#include <asm/arch/gpio.h>
+
+#include "atmel-mci.h"
+
+#define DRIVER_NAME "atmel_mci"
+
+#define MCI_DATA_ERROR_FLAGS (MCI_BIT(DCRCE) | MCI_BIT(DTOE) | \
+ MCI_BIT(OVRE) | MCI_BIT(UNRE))
+
+enum {
+ EVENT_CMD_COMPLETE = 0,
+ EVENT_DATA_COMPLETE,
+ EVENT_DATA_ERROR,
+ EVENT_STOP_SENT,
+ EVENT_STOP_COMPLETE,
+ EVENT_DMA_COMPLETE,
+ EVENT_DMA_ERROR,
+};
+
+struct atmel_mci_dma {
+ struct dma_request_sg req;
+ unsigned short rx_periph_id;
+ unsigned short tx_periph_id;
+};
+
+struct atmel_mci {
+ struct mmc_host *mmc;
+ void __iomem *regs;
+ struct atmel_mci_dma dma;
+
+ struct mmc_request *mrq;
+ struct mmc_command *cmd;
+ struct mmc_data *data;
+
+ u32 cmd_status;
+ u32 data_status;
+ u32 stop_status;
+ u32 stop_cmdr;
+
+ struct tasklet_struct tasklet;
+ unsigned long pending_events;
+ unsigned long completed_events;
+
+ int present;
+ int detect_pin;
+ int wp_pin;
+
+ /* For detect pin debouncing */
+ struct timer_list detect_timer;
+
+ unsigned long bus_hz;
+ unsigned long mapbase;
+ struct clk *mck;
+ struct platform_device *pdev;
+
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *debugfs_root;
+ struct dentry *debugfs_regs;
+ struct dentry *debugfs_req;
+ struct dentry *debugfs_pending_events;
+ struct dentry *debugfs_completed_events;
+#endif
+};
+
+/* Those printks take an awful lot of time... */
+#ifndef DEBUG
+static unsigned int fmax = 15000000U;
+#else
+static unsigned int fmax = 1000000U;
+#endif
+module_param(fmax, uint, 0444);
+MODULE_PARM_DESC(fmax, "Max frequency in Hz of the MMC bus clock");
+
+/* Test bit macros for completed events */
+#define mci_cmd_is_complete(host) \
+ test_bit(EVENT_CMD_COMPLETE, &host->completed_events)
+#define mci_data_is_complete(host) \
+ test_bit(EVENT_DATA_COMPLETE, &host->completed_events)
+#define mci_data_error_is_complete(host) \
+ test_bit(EVENT_DATA_ERROR, &host->completed_events)
+#define mci_stop_sent_is_complete(host) \
+ test_bit(EVENT_STOP_SENT, &host->completed_events)
+#define mci_stop_is_complete(host) \
+ test_bit(EVENT_STOP_COMPLETE, &host->completed_events)
+#define mci_dma_is_complete(host) \
+ test_bit(EVENT_DMA_COMPLETE, &host->completed_events)
+#define mci_dma_error_is_complete(host) \
+ test_bit(EVENT_DMA_ERROR, &host->completed_events)
+
+/* Test and clear bit macros for pending events */
+#define mci_clear_cmd_is_pending(host) \
+ test_and_clear_bit(EVENT_CMD_COMPLETE, &host->pending_events)
+#define mci_clear_data_is_pending(host) \
+ test_and_clear_bit(EVENT_DATA_COMPLETE, &host->pending_events)
+#define mci_clear_data_error_is_pending(host) \
+ test_and_clear_bit(EVENT_DATA_ERROR, &host->pending_events)
+#define mci_clear_stop_sent_is_pending(host) \
+ test_and_clear_bit(EVENT_STOP_SENT, &host->pending_events)
+#define mci_clear_stop_is_pending(host) \
+ test_and_clear_bit(EVENT_STOP_COMPLETE, &host->pending_events)
+#define mci_clear_dma_error_is_pending(host) \
+ test_and_clear_bit(EVENT_DMA_ERROR, &host->pending_events)
+
+/* Test and set bit macros for completed events */
+#define mci_set_cmd_is_completed(host) \
+ test_and_set_bit(EVENT_CMD_COMPLETE, &host->completed_events)
+#define mci_set_data_is_completed(host) \
+ test_and_set_bit(EVENT_DATA_COMPLETE, &host->completed_events)
+#define mci_set_data_error_is_completed(host) \
+ test_and_set_bit(EVENT_DATA_ERROR, &host->completed_events)
+#define mci_set_stop_sent_is_completed(host) \
+ test_and_set_bit(EVENT_STOP_SENT, &host->completed_events)
+#define mci_set_stop_is_completed(host) \
+ test_and_set_bit(EVENT_STOP_COMPLETE, &host->completed_events)
+#define mci_set_dma_error_is_completed(host) \
+ test_and_set_bit(EVENT_DMA_ERROR, &host->completed_events)
+
+/* Set bit macros for completed events */
+#define mci_set_cmd_complete(host) \
+ set_bit(EVENT_CMD_COMPLETE, &host->completed_events)
+#define mci_set_data_complete(host) \
+ set_bit(EVENT_DATA_COMPLETE, &host->completed_events)
+#define mci_set_data_error_complete(host) \
+ set_bit(EVENT_DATA_ERROR, &host->completed_events)
+#define mci_set_stop_sent_complete(host) \
+ set_bit(EVENT_STOP_SENT, &host->completed_events)
+#define mci_set_stop_complete(host) \
+ set_bit(EVENT_STOP_COMPLETE, &host->completed_events)
+#define mci_set_dma_complete(host) \
+ set_bit(EVENT_DMA_COMPLETE, &host->completed_events)
+#define mci_set_dma_error_complete(host) \
+ set_bit(EVENT_DMA_ERROR, &host->completed_events)
+
+/* Set bit macros for pending events */
+#define mci_set_cmd_pending(host) \
+ set_bit(EVENT_CMD_COMPLETE, &host->pending_events)
+#define mci_set_data_pending(host) \
+ set_bit(EVENT_DATA_COMPLETE, &host->pending_events)
+#define mci_set_data_error_pending(host) \
+ set_bit(EVENT_DATA_ERROR, &host->pending_events)
+#define mci_set_stop_sent_pending(host) \
+ set_bit(EVENT_STOP_SENT, &host->pending_events)
+#define mci_set_stop_pending(host) \
+ set_bit(EVENT_STOP_COMPLETE, &host->pending_events)
+#define mci_set_dma_error_pending(host) \
+ set_bit(EVENT_DMA_ERROR, &host->pending_events)
+
+/* Clear bit macros for pending events */
+#define mci_clear_cmd_pending(host) \
+ clear_bit(EVENT_CMD_COMPLETE, &host->pending_events)
+#define mci_clear_data_pending(host) \
+ clear_bit(EVENT_DATA_COMPLETE, &host->pending_events)
+#define mci_clear_data_error_pending(host) \
+ clear_bit(EVENT_DATA_ERROR, &host->pending_events)
+#define mci_clear_stop_sent_pending(host) \
+ clear_bit(EVENT_STOP_SENT, &host->pending_events)
+#define mci_clear_stop_pending(host) \
+ clear_bit(EVENT_STOP_COMPLETE, &host->pending_events)
+#define mci_clear_dma_error_pending(host) \
+ clear_bit(EVENT_DMA_ERROR, &host->pending_events)
+
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+
+#define DBG_REQ_BUF_SIZE (4096 - sizeof(unsigned int))
+
+struct req_dbg_data {
+ unsigned int nbytes;
+ char str[DBG_REQ_BUF_SIZE];
+};
+
+static int req_dbg_open(struct inode *inode, struct file *file)
+{
+ struct atmel_mci *host;
+ struct mmc_request *mrq;
+ struct mmc_command *cmd, *stop;
+ struct mmc_data *data;
+ struct req_dbg_data *priv;
+ char *str;
+ unsigned long n = 0;
+
+ priv = kzalloc(DBG_REQ_BUF_SIZE, GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ str = priv->str;
+
+ mutex_lock(&inode->i_mutex);
+ host = inode->i_private;
+
+ spin_lock_irq(&host->mmc->lock);
+ mrq = host->mrq;
+ if (mrq) {
+ cmd = mrq->cmd;
+ data = mrq->data;
+ stop = mrq->stop;
+ n = snprintf(str, DBG_REQ_BUF_SIZE,
+ "CMD%u(0x%x) %x %x %x %x %x (err %u)\n",
+ cmd->opcode, cmd->arg, cmd->flags,
+ cmd->resp[0], cmd->resp[1], cmd->resp[2],
+ cmd->resp[3], cmd->error);
+ if (n < DBG_REQ_BUF_SIZE && data)
+ n += snprintf(str + n, DBG_REQ_BUF_SIZE - n,
+ "DATA %u * %u (%u) %x (err %u)\n",
+ data->blocks, data->blksz,
+ data->bytes_xfered, data->flags,
+ data->error);
+ if (n < DBG_REQ_BUF_SIZE && stop)
+ n += snprintf(str + n, DBG_REQ_BUF_SIZE - n,
+ "CMD%u(0x%x) %x %x %x %x %x (err %u)\n",
+ stop->opcode, stop->arg, stop->flags,
+ stop->resp[0], stop->resp[1],
+ stop->resp[2], stop->resp[3],
+ stop->error);
+ }
+ spin_unlock_irq(&host->mmc->lock);
+ mutex_unlock(&inode->i_mutex);
+
+ priv->nbytes = min(n, DBG_REQ_BUF_SIZE);
+ file->private_data = priv;
+
+ return 0;
+}
+
+static ssize_t req_dbg_read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ struct req_dbg_data *priv = file->private_data;
+
+ return simple_read_from_buffer(buf, nbytes, ppos,
+ priv->str, priv->nbytes);
+}
+
+static int req_dbg_release(struct inode *inode, struct file *file)
+{
+ kfree(file->private_data);
+ return 0;
+}
+
+static const struct file_operations req_dbg_fops = {
+ .owner = THIS_MODULE,
+ .open = req_dbg_open,
+ .llseek = no_llseek,
+ .read = req_dbg_read,
+ .release = req_dbg_release,
+};
+
+static int regs_dbg_open(struct inode *inode, struct file *file)
+{
+ struct atmel_mci *host;
+ unsigned int i;
+ u32 *data;
+ int ret = -ENOMEM;
+
+ mutex_lock(&inode->i_mutex);
+ host = inode->i_private;
+ data = kmalloc(inode->i_size, GFP_KERNEL);
+ if (!data)
+ goto out;
+
+ spin_lock_irq(&host->mmc->lock);
+ for (i = 0; i < inode->i_size / 4; i++)
+ data[i] = __raw_readl(host->regs + i * 4);
+ spin_unlock_irq(&host->mmc->lock);
+
+ file->private_data = data;
+ ret = 0;
+
+out:
+ mutex_unlock(&inode->i_mutex);
+
+ return ret;
+}
+
+static ssize_t regs_dbg_read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ int ret;
+
+ mutex_lock(&inode->i_mutex);
+ ret = simple_read_from_buffer(buf, nbytes, ppos,
+ file->private_data,
+ file->f_dentry->d_inode->i_size);
+ mutex_unlock(&inode->i_mutex);
+
+ return ret;
+}
+
+static int regs_dbg_release(struct inode *inode, struct file *file)
+{
+ kfree(file->private_data);
+ return 0;
+}
+
+static const struct file_operations regs_dbg_fops = {
+ .owner = THIS_MODULE,
+ .open = regs_dbg_open,
+ .llseek = generic_file_llseek,
+ .read = regs_dbg_read,
+ .release = regs_dbg_release,
+};
+
+static void atmci_init_debugfs(struct atmel_mci *host)
+{
+ struct mmc_host *mmc;
+ struct dentry *root, *regs;
+ struct resource *res;
+
+ mmc = host->mmc;
+ root = debugfs_create_dir(mmc_hostname(mmc), NULL);
+ if (IS_ERR(root) || !root)
+ goto err_root;
+ host->debugfs_root = root;
+
+ regs = debugfs_create_file("regs", 0400, root, host, &regs_dbg_fops);
+ if (!regs)
+ goto err_regs;
+
+ res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0);
+ regs->d_inode->i_size = res->end - res->start + 1;
+ host->debugfs_regs = regs;
+
+ host->debugfs_req = debugfs_create_file("req", 0400, root,
+ host, &req_dbg_fops);
+ if (!host->debugfs_req)
+ goto err_req;
+
+ host->debugfs_pending_events
+ = debugfs_create_u32("pending_events", 0400, root,
+ (u32 *)&host->pending_events);
+ if (!host->debugfs_pending_events)
+ goto err_pending_events;
+
+ host->debugfs_completed_events
+ = debugfs_create_u32("completed_events", 0400, root,
+ (u32 *)&host->completed_events);
+ if (!host->debugfs_completed_events)
+ goto err_completed_events;
+
+ return;
+
+err_completed_events:
+ debugfs_remove(host->debugfs_pending_events);
+err_pending_events:
+ debugfs_remove(host->debugfs_req);
+err_req:
+ debugfs_remove(host->debugfs_regs);
+err_regs:
+ debugfs_remove(host->debugfs_root);
+err_root:
+ host->debugfs_root = NULL;
+ dev_err(&host->pdev->dev,
+ "failed to initialize debugfs for %s\n",
+ mmc_hostname(mmc));
+}
+
+static void atmci_cleanup_debugfs(struct atmel_mci *host)
+{
+ if (host->debugfs_root) {
+ debugfs_remove(host->debugfs_completed_events);
+ debugfs_remove(host->debugfs_pending_events);
+ debugfs_remove(host->debugfs_req);
+ debugfs_remove(host->debugfs_regs);
+ debugfs_remove(host->debugfs_root);
+ host->debugfs_root = NULL;
+ }
+}
+#else
+static inline void atmci_init_debugfs(struct atmel_mci *host)
+{
+
+}
+
+static inline void atmci_cleanup_debugfs(struct atmel_mci *host)
+{
+
+}
+#endif /* CONFIG_DEBUG_FS */
+
+static inline unsigned int ns_to_clocks(struct atmel_mci *host,
+ unsigned int ns)
+{
+ return (ns * (host->bus_hz / 1000000) + 999) / 1000;
+}
+
+static void atmci_set_timeout(struct atmel_mci *host,
+ struct mmc_data *data)
+{
+ static unsigned dtomul_to_shift[] = {
+ 0, 4, 7, 8, 10, 12, 16, 20
+ };
+ unsigned timeout;
+ unsigned dtocyc, dtomul;
+
+ timeout = ns_to_clocks(host, data->timeout_ns) + data->timeout_clks;
+
+ for (dtomul = 0; dtomul < 8; dtomul++) {
+ unsigned shift = dtomul_to_shift[dtomul];
+ dtocyc = (timeout + (1 << shift) - 1) >> shift;
+ if (dtocyc < 15)
+ break;
+ }
+
+ if (dtomul >= 8) {
+ dtomul = 7;
+ dtocyc = 15;
+ }
+
+ dev_dbg(&host->mmc->class_dev, "setting timeout to %u cycles\n",
+ dtocyc << dtomul_to_shift[dtomul]);
+ mci_writel(host, DTOR, (MCI_BF(DTOMUL, dtomul)
+ | MCI_BF(DTOCYC, dtocyc)));
+}
+
+/*
+ * Return mask with command flags to be enabled for this command.
+ */
+static u32 atmci_prepare_command(struct mmc_host *mmc,
+ struct mmc_command *cmd)
+{
+ u32 cmdr;
+
+ cmd->error = 0;
+
+ cmdr = MCI_BF(CMDNB, cmd->opcode);
+
+ if (cmd->flags & MMC_RSP_PRESENT) {
+ if (cmd->flags & MMC_RSP_136)
+ cmdr |= MCI_BF(RSPTYP, MCI_RSPTYP_136_BIT);
+ else
+ cmdr |= MCI_BF(RSPTYP, MCI_RSPTYP_48_BIT);
+ }
+
+ /*
+ * This should really be MAXLAT_5 for CMD2 and ACMD41, but
+ * it's too difficult to determine whether this is an ACMD or
+ * not. Better make it 64.
+ */
+ cmdr |= MCI_BIT(MAXLAT);
+
+ if (mmc->ios.bus_mode == MMC_BUSMODE_OPENDRAIN)
+ cmdr |= MCI_BIT(OPDCMD);
+
+ dev_dbg(&mmc->class_dev,
+ "cmd: op %02x arg %08x flags %08x, cmdflags %08lx\n",
+ cmd->opcode, cmd->arg, cmd->flags, (unsigned long)cmdr);
+
+ return cmdr;
+}
+
+static void atmci_start_command(struct atmel_mci *host,
+ struct mmc_command *cmd,
+ u32 cmd_flags)
+{
+ WARN_ON(host->cmd);
+ host->cmd = cmd;
+
+ mci_writel(host, ARGR, cmd->arg);
+ mci_writel(host, CMDR, cmd_flags);
+
+ if (cmd->data)
+ dma_start_request(host->dma.req.req.dmac,
+ host->dma.req.req.channel);
+}
+
+/*
+ * Returns a mask of flags to be set in the command register when the
+ * command to start the transfer is to be sent.
+ */
+static u32 atmci_prepare_data(struct mmc_host *mmc, struct mmc_data *data)
+{
+ struct atmel_mci *host = mmc_priv(mmc);
+ u32 cmd_flags;
+
+ WARN_ON(host->data);
+ host->data = data;
+
+ atmci_set_timeout(host, data);
+ mci_writel(host, BLKR, (MCI_BF(BCNT, data->blocks)
+ | MCI_BF(BLKLEN, data->blksz)));
+ host->dma.req.block_size = data->blksz;
+ host->dma.req.nr_blocks = data->blocks;
+
+ cmd_flags = MCI_BF(TRCMD, MCI_TRCMD_START_TRANS);
+ if (data->flags & MMC_DATA_STREAM)
+ cmd_flags |= MCI_BF(TRTYP, MCI_TRTYP_STREAM);
+ else if (data->blocks > 1)
+ cmd_flags |= MCI_BF(TRTYP, MCI_TRTYP_MULTI_BLOCK);
+ else
+ cmd_flags |= MCI_BF(TRTYP, MCI_TRTYP_BLOCK);
+
+ if (data->flags & MMC_DATA_READ) {
+ cmd_flags |= MCI_BIT(TRDIR);
+ host->dma.req.nr_sg
+ = dma_map_sg(&host->pdev->dev, data->sg,
+ data->sg_len, DMA_FROM_DEVICE);
+ host->dma.req.periph_id = host->dma.rx_periph_id;
+ host->dma.req.direction = DMA_DIR_PERIPH_TO_MEM;
+ host->dma.req.data_reg = host->mapbase + MCI_RDR;
+ } else {
+ host->dma.req.nr_sg
+ = dma_map_sg(&host->pdev->dev, data->sg,
+ data->sg_len, DMA_TO_DEVICE);
+ host->dma.req.periph_id = host->dma.tx_periph_id;
+ host->dma.req.direction = DMA_DIR_MEM_TO_PERIPH;
+ host->dma.req.data_reg = host->mapbase + MCI_TDR;
+ }
+ host->dma.req.sg = data->sg;
+
+ dma_prepare_request_sg(host->dma.req.req.dmac, &host->dma.req);
+
+ return cmd_flags;
+}
+
+static void atmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct atmel_mci *host = mmc_priv(mmc);
+ struct mmc_data *data = mrq->data;
+ u32 iflags;
+ u32 cmdflags = 0;
+
+ iflags = mci_readl(host, IMR);
+ if (iflags)
+ dev_warn(&mmc->class_dev, "WARNING: IMR=0x%08x\n",
+ mci_readl(host, IMR));
+
+ WARN_ON(host->mrq != NULL);
+
+ /*
+ * We may "know" the card is gone even though there's still an
+ * electrical connection. If so, we really need to communicate
+ * this to the MMC core since there won't be any more
+ * interrupts as the card is completely removed. Otherwise,
+ * the MMC core might believe the card is still there even
+ * though the card was just removed very slowly.
+ */
+ if (!host->present) {
+ mrq->cmd->error = -ENOMEDIUM;
+ mmc_request_done(mmc, mrq);
+ return;
+ }
+
+ host->mrq = mrq;
+ host->pending_events = 0;
+ host->completed_events = 0;
+
+ iflags = MCI_BIT(CMDRDY);
+ cmdflags = atmci_prepare_command(mmc, mrq->cmd);
+
+ if (mrq->stop) {
+ WARN_ON(!data);
+
+ host->stop_cmdr = atmci_prepare_command(mmc, mrq->stop);
+ host->stop_cmdr |= MCI_BF(TRCMD, MCI_TRCMD_STOP_TRANS);
+ if (!(data->flags & MMC_DATA_WRITE))
+ host->stop_cmdr |= MCI_BIT(TRDIR);
+ if (data->flags & MMC_DATA_STREAM)
+ host->stop_cmdr |= MCI_BF(TRTYP, MCI_TRTYP_STREAM);
+ else
+ host->stop_cmdr |= MCI_BF(TRTYP, MCI_TRTYP_MULTI_BLOCK);
+ }
+ if (data) {
+ cmdflags |= atmci_prepare_data(mmc, data);
+ iflags |= MCI_DATA_ERROR_FLAGS;
+ }
+
+ atmci_start_command(host, mrq->cmd, cmdflags);
+ mci_writel(host, IER, iflags);
+}
+
+static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{
+ struct atmel_mci *host = mmc_priv(mmc);
+ u32 mr;
+
+ if (ios->clock) {
+ u32 clkdiv;
+
+ /* Set clock rate */
+ clkdiv = DIV_ROUND_UP(host->bus_hz, 2 * ios->clock) - 1;
+ if (clkdiv > 255) {
+ dev_warn(&mmc->class_dev,
+ "clock %u too slow; using %lu\n",
+ ios->clock, host->bus_hz / (2 * 256));
+ clkdiv = 255;
+ }
+
+ mr = mci_readl(host, MR);
+ mr = MCI_BFINS(CLKDIV, clkdiv, mr)
+ | MCI_BIT(WRPROOF) | MCI_BIT(RDPROOF);
+ mci_writel(host, MR, mr);
+
+ /* Enable the MCI controller */
+ mci_writel(host, CR, MCI_BIT(MCIEN));
+ } else {
+ /* Disable the MCI controller */
+ mci_writel(host, CR, MCI_BIT(MCIDIS));
+ }
+
+ switch (ios->bus_width) {
+ case MMC_BUS_WIDTH_1:
+ mci_writel(host, SDCR, 0);
+ break;
+ case MMC_BUS_WIDTH_4:
+ mci_writel(host, SDCR, MCI_BIT(SDCBUS));
+ break;
+ }
+
+ switch (ios->power_mode) {
+ case MMC_POWER_ON:
+ /* Send init sequence (74 clock cycles) */
+ mci_writel(host, IDR, ~0UL);
+ mci_writel(host, CMDR, MCI_BF(SPCMD, MCI_SPCMD_INIT_CMD));
+ while (!(mci_readl(host, SR) & MCI_BIT(CMDRDY)))
+ cpu_relax();
+ break;
+ default:
+ /*
+ * TODO: None of the currently available AVR32-based
+ * boards allow MMC power to be turned off. Implement
+ * power control when this can be tested properly.
+ */
+ break;
+ }
+}
+
+static int atmci_get_ro(struct mmc_host *mmc)
+{
+ int read_only = 0;
+ struct atmel_mci *host = mmc_priv(mmc);
+
+ if (host->wp_pin >= 0) {
+ read_only = gpio_get_value(host->wp_pin);
+ dev_dbg(&mmc->class_dev, "card is %s\n",
+ read_only ? "read-only" : "read-write");
+ } else {
+ dev_dbg(&mmc->class_dev,
+ "no pin for checking read-only switch."
+ " Assuming write-enable.\n");
+ }
+
+ return read_only;
+}
+
+static struct mmc_host_ops atmci_ops = {
+ .request = atmci_request,
+ .set_ios = atmci_set_ios,
+ .get_ro = atmci_get_ro,
+};
+
+static void atmci_request_end(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ struct atmel_mci *host = mmc_priv(mmc);
+
+ WARN_ON(host->cmd || host->data);
+ host->mrq = NULL;
+
+ mmc_request_done(mmc, mrq);
+}
+
+static void send_stop_cmd(struct mmc_host *mmc, struct mmc_data *data,
+ u32 flags)
+{
+ struct atmel_mci *host = mmc_priv(mmc);
+
+ atmci_start_command(host, data->stop, host->stop_cmdr | flags);
+ mci_writel(host, IER, MCI_BIT(CMDRDY));
+}
+
+static void atmci_data_complete(struct atmel_mci *host, struct mmc_data *data)
+{
+ host->data = NULL;
+ dma_unmap_sg(&host->pdev->dev, data->sg, host->dma.req.nr_sg,
+ ((data->flags & MMC_DATA_WRITE)
+ ? DMA_TO_DEVICE : DMA_FROM_DEVICE));
+
+ /*
+ * Data might complete before command for very short transfers
+ * (like READ_SCR)
+ */
+ if (mci_cmd_is_complete(host)
+ && (!data->stop || mci_stop_is_complete(host)))
+ atmci_request_end(host->mmc, data->mrq);
+}
+
+static void atmci_command_complete(struct atmel_mci *host,
+ struct mmc_command *cmd, u32 status)
+{
+ if (status & MCI_BIT(RTOE))
+ cmd->error = -ETIMEDOUT;
+ else if ((cmd->flags & MMC_RSP_CRC)
+ && (status & MCI_BIT(RCRCE)))
+ cmd->error = -EILSEQ;
+ else if (status & (MCI_BIT(RINDE) | MCI_BIT(RDIRE) | MCI_BIT(RENDE)))
+ cmd->error = -EIO;
+
+ if (cmd->error) {
+ dev_dbg(&host->mmc->class_dev,
+ "command error: op=0x%x status=0x%08x\n",
+ cmd->opcode, status);
+
+ if (cmd->data) {
+ dma_stop_request(host->dma.req.req.dmac,
+ host->dma.req.req.channel);
+ mci_writel(host, IDR, MCI_BIT(NOTBUSY)
+ | MCI_DATA_ERROR_FLAGS);
+ host->data = NULL;
+ }
+ }
+}
+
+static void atmci_detect_change(unsigned long data)
+{
+ struct atmel_mci *host = (struct atmel_mci *)data;
+ struct mmc_request *mrq = host->mrq;
+ int present;
+
+ /*
+ * atmci_remove() sets detect_pin to -1 before freeing the
+ * interrupt. We must not re-enable the interrupt if it has
+ * been freed.
+ */
+ smp_rmb();
+ if (host->detect_pin < 0)
+ return;
+
+ enable_irq(gpio_to_irq(host->detect_pin));
+ present = !gpio_get_value(host->detect_pin);
+
+ dev_vdbg(&host->pdev->dev, "detect change: %d (was %d)\n",
+ present, host->present);
+
+ if (present != host->present) {
+ dev_dbg(&host->mmc->class_dev, "card %s\n",
+ present ? "inserted" : "removed");
+ host->present = present;
+
+ /* Reset controller if card is gone */
+ if (!present) {
+ mci_writel(host, CR, MCI_BIT(SWRST));
+ mci_writel(host, IDR, ~0UL);
+ mci_writel(host, CR, MCI_BIT(MCIEN));
+ }
+
+ /* Clean up queue if present */
+ if (mrq) {
+ if (!mci_cmd_is_complete(host))
+ mrq->cmd->error = -ENOMEDIUM;
+ if (mrq->data && !mci_data_is_complete(host)
+ && !mci_data_error_is_complete(host)) {
+ dma_stop_request(host->dma.req.req.dmac,
+ host->dma.req.req.channel);
+ host->data->error = -ENOMEDIUM;
+ atmci_data_complete(host, host->data);
+ }
+ if (mrq->stop && !mci_stop_is_complete(host))
+ mrq->stop->error = -ENOMEDIUM;
+
+ host->cmd = NULL;
+ atmci_request_end(host->mmc, mrq);
+ }
+
+ mmc_detect_change(host->mmc, 0);
+ }
+}
+
+static void atmci_tasklet_func(unsigned long priv)
+{
+ struct mmc_host *mmc = (struct mmc_host *)priv;
+ struct atmel_mci *host = mmc_priv(mmc);
+ struct mmc_request *mrq = host->mrq;
+ struct mmc_data *data = host->data;
+
+ dev_vdbg(&mmc->class_dev,
+ "tasklet: pending/completed/mask %lx/%lx/%x\n",
+ host->pending_events, host->completed_events,
+ mci_readl(host, IMR));
+
+ if (mci_clear_cmd_is_pending(host)) {
+ mci_set_cmd_complete(host);
+ atmci_command_complete(host, mrq->cmd, host->cmd_status);
+ if (!host->data || mci_data_is_complete(host)
+ || mci_data_error_is_complete(host))
+ atmci_request_end(mmc, mrq);
+ }
+ if (mci_clear_stop_is_pending(host)) {
+ mci_set_stop_complete(host);
+ atmci_command_complete(host, mrq->stop, host->stop_status);
+ if (mci_data_is_complete(host)
+ || mci_data_error_is_complete(host))
+ atmci_request_end(mmc, mrq);
+ }
+ if (mci_clear_dma_error_is_pending(host)) {
+ mci_set_dma_error_complete(host);
+ mci_clear_data_pending(host);
+
+ /* DMA controller got bus error => invalid address */
+ data->error = -EIO;
+
+ dev_dbg(&mmc->class_dev, "dma error after %u bytes xfered\n",
+ host->data->bytes_xfered);
+
+ if (data->stop
+ && !mci_set_stop_sent_is_completed(host))
+ /* TODO: Check if card is still present */
+ send_stop_cmd(host->mmc, data, 0);
+
+ atmci_data_complete(host, data);
+ }
+ if (mci_clear_data_error_is_pending(host)) {
+ u32 status = host->data_status;
+
+ mci_set_data_error_complete(host);
+ mci_clear_data_pending(host);
+
+ dma_stop_request(host->dma.req.req.dmac,
+ host->dma.req.req.channel);
+
+ if (status & MCI_BIT(DCRCE)) {
+ dev_dbg(&mmc->class_dev, "data CRC error\n");
+ data->error = -EILSEQ;
+ } else if (status & MCI_BIT(DTOE)) {
+ dev_dbg(&mmc->class_dev, "data timeout error\n");
+ data->error = -ETIMEDOUT;
+ } else {
+ dev_dbg(&mmc->class_dev, "data FIFO error\n");
+ data->error = -EIO;
+ }
+ dev_dbg(&mmc->class_dev, "bytes xfered: %u\n",
+ data->bytes_xfered);
+
+ if (data->stop
+ && !mci_set_stop_sent_is_completed(host))
+ /* TODO: Check if card is still present */
+ send_stop_cmd(host->mmc, data, 0);
+
+ atmci_data_complete(host, data);
+ }
+ if (mci_clear_data_is_pending(host)) {
+ mci_set_data_complete(host);
+ data->bytes_xfered = data->blocks * data->blksz;
+ atmci_data_complete(host, data);
+ }
+}
+
+static void atmci_cmd_interrupt(struct mmc_host *mmc, u32 status)
+{
+ struct atmel_mci *host = mmc_priv(mmc);
+ struct mmc_command *cmd = host->cmd;
+
+ /*
+ * Read the response now so that we're free to send a new
+ * command immediately.
+ */
+ cmd->resp[0] = mci_readl(host, RSPR);
+ cmd->resp[1] = mci_readl(host, RSPR);
+ cmd->resp[2] = mci_readl(host, RSPR);
+ cmd->resp[3] = mci_readl(host, RSPR);
+
+ mci_writel(host, IDR, MCI_BIT(CMDRDY));
+ host->cmd = NULL;
+
+ if (mci_stop_sent_is_complete(host)) {
+ host->stop_status = status;
+ mci_set_stop_pending(host);
+ } else {
+ struct mmc_request *mrq = host->mrq;
+
+ if (mrq->stop && mci_dma_is_complete(host)
+ && !mci_set_stop_sent_is_completed(host))
+ send_stop_cmd(host->mmc, mrq->data, 0);
+ host->cmd_status = status;
+ mci_set_cmd_pending(host);
+ }
+
+ tasklet_schedule(&host->tasklet);
+}
+
+static void atmci_xfer_complete(struct dma_request *_req)
+{
+ struct dma_request_sg *req = to_dma_request_sg(_req);
+ struct atmel_mci_dma *dma;
+ struct atmel_mci *host;
+ struct mmc_data *data;
+
+ dma = container_of(req, struct atmel_mci_dma, req);
+ host = container_of(dma, struct atmel_mci, dma);
+ data = host->data;
+
+ /*
+ * This callback may be called before we see the CMDRDY
+ * interrupt under heavy irq load (possibly caused by other
+ * drivers) or when interrupts are disabled for a long time.
+ */
+ mci_set_dma_complete(host);
+ if (data->stop && mci_cmd_is_complete(host)
+ && !mci_set_stop_sent_is_completed(host))
+ send_stop_cmd(host->mmc, data, 0);
+
+ /*
+ * Regardless of what the documentation says, we have to wait
+ * for NOTBUSY even after block read operations.
+ *
+ * When the DMA transfer is complete, the controller may still
+ * be reading the CRC from the card, i.e. the data transfer is
+ * still in progress and we haven't seen all the potential
+ * error bits yet.
+ */
+ mci_writel(host, IER, MCI_BIT(NOTBUSY));
+}
+
+static void atmci_dma_error(struct dma_request *_req)
+{
+ struct dma_request_sg *req = to_dma_request_sg(_req);
+ struct atmel_mci_dma *dma;
+ struct atmel_mci *host;
+
+ dma = container_of(req, struct atmel_mci_dma, req);
+ host = container_of(dma, struct atmel_mci, dma);
+
+ mci_writel(host, IDR, (MCI_BIT(NOTBUSY)
+ | MCI_DATA_ERROR_FLAGS));
+
+ mci_set_dma_error_pending(host);
+ tasklet_schedule(&host->tasklet);
+}
+
+static irqreturn_t atmci_interrupt(int irq, void *dev_id)
+{
+ struct mmc_host *mmc = dev_id;
+ struct atmel_mci *host = mmc_priv(mmc);
+ u32 status, mask, pending;
+
+ spin_lock(&mmc->lock);
+
+ status = mci_readl(host, SR);
+ mask = mci_readl(host, IMR);
+ pending = status & mask;
+
+ do {
+ if (pending & MCI_DATA_ERROR_FLAGS) {
+ mci_writel(host, IDR, (MCI_BIT(NOTBUSY)
+ | MCI_DATA_ERROR_FLAGS));
+ host->data_status = status;
+ mci_set_data_error_pending(host);
+ tasklet_schedule(&host->tasklet);
+ break;
+ }
+ if (pending & MCI_BIT(CMDRDY))
+ atmci_cmd_interrupt(mmc, status);
+ if (pending & MCI_BIT(NOTBUSY)) {
+ mci_writel(host, IDR, (MCI_BIT(NOTBUSY)
+ | MCI_DATA_ERROR_FLAGS));
+ mci_set_data_pending(host);
+ tasklet_schedule(&host->tasklet);
+ }
+
+ status = mci_readl(host, SR);
+ mask = mci_readl(host, IMR);
+ pending = status & mask;
+ } while (pending);
+
+ spin_unlock(&mmc->lock);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t atmci_detect_interrupt(int irq, void *dev_id)
+{
+ struct mmc_host *mmc = dev_id;
+ struct atmel_mci *host = mmc_priv(mmc);
+
+ /*
+ * Disable interrupts until the pin has stabilized and check
+ * the state then. Use mod_timer() since we may be in the
+ * middle of the timer routine when this interrupt triggers.
+ */
+ disable_irq_nosync(irq);
+ mod_timer(&host->detect_timer, jiffies + msecs_to_jiffies(20));
+
+ return IRQ_HANDLED;
+}
+
+static int __devinit atmci_probe(struct platform_device *pdev)
+{
+ struct mci_platform_data *board;
+ struct atmel_mci *host;
+ struct mmc_host *mmc;
+ struct resource *regs;
+ int irq;
+ int ret;
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs)
+ return -ENXIO;
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ board = pdev->dev.platform_data;
+
+ mmc = mmc_alloc_host(sizeof(struct atmel_mci), &pdev->dev);
+ if (!mmc)
+ return -ENOMEM;
+
+ host = mmc_priv(mmc);
+ host->pdev = pdev;
+ host->mmc = mmc;
+ if (board) {
+ host->detect_pin = board->detect_pin;
+ host->wp_pin = board->wp_pin;
+ } else {
+ host->detect_pin = -1;
+ host->wp_pin = -1;
+ }
+
+ host->mck = clk_get(&pdev->dev, "mci_clk");
+ if (IS_ERR(host->mck)) {
+ ret = PTR_ERR(host->mck);
+ goto out_free_host;
+ }
+ clk_enable(host->mck);
+
+ ret = -ENOMEM;
+ host->regs = ioremap(regs->start, regs->end - regs->start + 1);
+ if (!host->regs)
+ goto out_disable_clk;
+
+ host->bus_hz = clk_get_rate(host->mck);
+ host->mapbase = regs->start;
+
+ mmc->ops = &atmci_ops;
+ mmc->f_min = (host->bus_hz + 511) / 512;
+ mmc->f_max = min((unsigned int)(host->bus_hz / 2), fmax);
+ mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
+ mmc->caps |= MMC_CAP_4_BIT_DATA;
+
+ tasklet_init(&host->tasklet, atmci_tasklet_func, (unsigned long)mmc);
+
+ ret = request_irq(irq, atmci_interrupt, 0, "mmci", mmc);
+ if (ret)
+ goto out_unmap;
+
+ /* Assume card is present if we don't have a detect pin */
+ host->present = 1;
+ if (host->detect_pin >= 0) {
+ if (gpio_request(host->detect_pin, "mmc_detect")) {
+ dev_dbg(&mmc->class_dev, "no detect pin available\n");
+ host->detect_pin = -1;
+ } else {
+ host->present = !gpio_get_value(host->detect_pin);
+ }
+ }
+ if (host->wp_pin >= 0) {
+ if (gpio_request(host->wp_pin, "mmc_wp")) {
+ dev_dbg(&mmc->class_dev, "no WP pin available\n");
+ host->wp_pin = -1;
+ }
+ }
+
+ /* TODO: Get this information from platform data */
+ ret = -ENOMEM;
+ host->dma.req.req.dmac = find_dma_controller(0);
+ if (!host->dma.req.req.dmac) {
+ dev_dbg(&mmc->class_dev, "no DMA controller available\n");
+ goto out_free_irq;
+ }
+ ret = dma_alloc_channel(host->dma.req.req.dmac);
+ if (ret < 0) {
+ dev_dbg(&mmc->class_dev, "unable to allocate DMA channel\n");
+ goto out_free_irq;
+ }
+ host->dma.req.req.channel = ret;
+ host->dma.req.width = DMA_WIDTH_32BIT;
+ host->dma.req.req.xfer_complete = atmci_xfer_complete;
+ host->dma.req.req.block_complete = NULL; // atmci_block_complete;
+ host->dma.req.req.error = atmci_dma_error;
+ host->dma.rx_periph_id = 0;
+ host->dma.tx_periph_id = 1;
+
+ mci_writel(host, CR, MCI_BIT(SWRST));
+ mci_writel(host, IDR, ~0UL);
+
+ platform_set_drvdata(pdev, host);
+
+ mmc_add_host(mmc);
+
+ if (host->detect_pin >= 0) {
+ setup_timer(&host->detect_timer, atmci_detect_change,
+ (unsigned long)host);
+
+ ret = request_irq(gpio_to_irq(host->detect_pin),
+ atmci_detect_interrupt,
+ IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
+ DRIVER_NAME, mmc);
+ if (ret) {
+ dev_dbg(&mmc->class_dev,
+ "could not request IRQ %d for detect pin\n",
+ gpio_to_irq(host->detect_pin));
+ gpio_free(host->detect_pin);
+ host->detect_pin = -1;
+ }
+ }
+
+ dev_info(&mmc->class_dev, "Atmel MCI controller at 0x%08lx irq %d\n",
+ host->mapbase, irq);
+
+ atmci_init_debugfs(host);
+
+ return 0;
+
+out_free_irq:
+ if (host->detect_pin >= 0)
+ gpio_free(host->detect_pin);
+ if (host->wp_pin >= 0)
+ gpio_free(host->wp_pin);
+ free_irq(irq, mmc);
+out_unmap:
+ iounmap(host->regs);
+out_disable_clk:
+ clk_disable(host->mck);
+ clk_put(host->mck);
+out_free_host:
+ mmc_free_host(mmc);
+ return ret;
+}
+
+static int __devexit atmci_remove(struct platform_device *pdev)
+{
+ struct atmel_mci *host = platform_get_drvdata(pdev);
+
+ platform_set_drvdata(pdev, NULL);
+
+ if (host) {
+ atmci_cleanup_debugfs(host);
+
+ if (host->detect_pin >= 0) {
+ int pin = host->detect_pin;
+
+ /* Make sure our timer doesn't enable the interrupt */
+ host->detect_pin = -1;
+ smp_wmb();
+
+ free_irq(gpio_to_irq(pin), host->mmc);
+ del_timer_sync(&host->detect_timer);
+ cancel_delayed_work(&host->mmc->detect);
+ gpio_free(pin);
+ }
+
+ mmc_remove_host(host->mmc);
+
+ mci_writel(host, IDR, ~0UL);
+ mci_writel(host, CR, MCI_BIT(MCIDIS));
+ mci_readl(host, SR);
+
+ dma_release_channel(host->dma.req.req.dmac,
+ host->dma.req.req.channel);
+
+ if (host->wp_pin >= 0)
+ gpio_free(host->wp_pin);
+
+ free_irq(platform_get_irq(pdev, 0), host->mmc);
+ iounmap(host->regs);
+
+ clk_disable(host->mck);
+ clk_put(host->mck);
+
+ mmc_free_host(host->mmc);
+ }
+ return 0;
+}
+
+static struct platform_driver atmci_driver = {
+ .probe = atmci_probe,
+ .remove = __devexit_p(atmci_remove),
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+
+static int __init atmci_init(void)
+{
+ return platform_driver_register(&atmci_driver);
+}
+
+static void __exit atmci_exit(void)
+{
+ platform_driver_unregister(&atmci_driver);
+}
+
+module_init(atmci_init);
+module_exit(atmci_exit);
+
+MODULE_DESCRIPTION("Atmel Multimedia Card Interface driver");
+MODULE_LICENSE("GPL");
diff --exclude=.git -urN linux-2.6.25.6/drivers/mmc/host/atmel-mci.h avr32-2.6/drivers/mmc/host/atmel-mci.h
--- linux-2.6.25.6/drivers/mmc/host/atmel-mci.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/mmc/host/atmel-mci.h 2008-06-12 15:09:41.083816184 +0200
@@ -0,0 +1,192 @@
+/*
+ * Atmel MultiMedia Card Interface driver
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __DRIVERS_MMC_ATMEL_MCI_H__
+#define __DRIVERS_MMC_ATMEL_MCI_H__
+
+/* MCI register offsets */
+#define MCI_CR 0x0000
+#define MCI_MR 0x0004
+#define MCI_DTOR 0x0008
+#define MCI_SDCR 0x000c
+#define MCI_ARGR 0x0010
+#define MCI_CMDR 0x0014
+#define MCI_BLKR 0x0018
+#define MCI_RSPR 0x0020
+#define MCI_RSPR1 0x0024
+#define MCI_RSPR2 0x0028
+#define MCI_RSPR3 0x002c
+#define MCI_RDR 0x0030
+#define MCI_TDR 0x0034
+#define MCI_SR 0x0040
+#define MCI_IER 0x0044
+#define MCI_IDR 0x0048
+#define MCI_IMR 0x004c
+
+/* Bitfields in CR */
+#define MCI_MCIEN_OFFSET 0
+#define MCI_MCIEN_SIZE 1
+#define MCI_MCIDIS_OFFSET 1
+#define MCI_MCIDIS_SIZE 1
+#define MCI_PWSEN_OFFSET 2
+#define MCI_PWSEN_SIZE 1
+#define MCI_PWSDIS_OFFSET 3
+#define MCI_PWSDIS_SIZE 1
+#define MCI_SWRST_OFFSET 7
+#define MCI_SWRST_SIZE 1
+
+/* Bitfields in MR */
+#define MCI_CLKDIV_OFFSET 0
+#define MCI_CLKDIV_SIZE 8
+#define MCI_PWSDIV_OFFSET 8
+#define MCI_PWSDIV_SIZE 3
+#define MCI_RDPROOF_OFFSET 11
+#define MCI_RDPROOF_SIZE 1
+#define MCI_WRPROOF_OFFSET 12
+#define MCI_WRPROOF_SIZE 1
+#define MCI_DMAPADV_OFFSET 14
+#define MCI_DMAPADV_SIZE 1
+#define MCI_BLKLEN_OFFSET 16
+#define MCI_BLKLEN_SIZE 16
+
+/* Bitfields in DTOR */
+#define MCI_DTOCYC_OFFSET 0
+#define MCI_DTOCYC_SIZE 4
+#define MCI_DTOMUL_OFFSET 4
+#define MCI_DTOMUL_SIZE 3
+
+/* Bitfields in SDCR */
+#define MCI_SDCSEL_OFFSET 0
+#define MCI_SDCSEL_SIZE 4
+#define MCI_SDCBUS_OFFSET 7
+#define MCI_SDCBUS_SIZE 1
+
+/* Bitfields in ARGR */
+#define MCI_ARG_OFFSET 0
+#define MCI_ARG_SIZE 32
+
+/* Bitfields in CMDR */
+#define MCI_CMDNB_OFFSET 0
+#define MCI_CMDNB_SIZE 6
+#define MCI_RSPTYP_OFFSET 6
+#define MCI_RSPTYP_SIZE 2
+#define MCI_SPCMD_OFFSET 8
+#define MCI_SPCMD_SIZE 3
+#define MCI_OPDCMD_OFFSET 11
+#define MCI_OPDCMD_SIZE 1
+#define MCI_MAXLAT_OFFSET 12
+#define MCI_MAXLAT_SIZE 1
+#define MCI_TRCMD_OFFSET 16
+#define MCI_TRCMD_SIZE 2
+#define MCI_TRDIR_OFFSET 18
+#define MCI_TRDIR_SIZE 1
+#define MCI_TRTYP_OFFSET 19
+#define MCI_TRTYP_SIZE 2
+
+/* Bitfields in BLKR */
+#define MCI_BCNT_OFFSET 0
+#define MCI_BCNT_SIZE 16
+
+/* Bitfields in RSPRn */
+#define MCI_RSP_OFFSET 0
+#define MCI_RSP_SIZE 32
+
+/* Bitfields in SR/IER/IDR/IMR */
+#define MCI_CMDRDY_OFFSET 0
+#define MCI_CMDRDY_SIZE 1
+#define MCI_RXRDY_OFFSET 1
+#define MCI_RXRDY_SIZE 1
+#define MCI_TXRDY_OFFSET 2
+#define MCI_TXRDY_SIZE 1
+#define MCI_BLKE_OFFSET 3
+#define MCI_BLKE_SIZE 1
+#define MCI_DTIP_OFFSET 4
+#define MCI_DTIP_SIZE 1
+#define MCI_NOTBUSY_OFFSET 5
+#define MCI_NOTBUSY_SIZE 1
+#define MCI_ENDRX_OFFSET 6
+#define MCI_ENDRX_SIZE 1
+#define MCI_ENDTX_OFFSET 7
+#define MCI_ENDTX_SIZE 1
+#define MCI_RXBUFF_OFFSET 14
+#define MCI_RXBUFF_SIZE 1
+#define MCI_TXBUFE_OFFSET 15
+#define MCI_TXBUFE_SIZE 1
+#define MCI_RINDE_OFFSET 16
+#define MCI_RINDE_SIZE 1
+#define MCI_RDIRE_OFFSET 17
+#define MCI_RDIRE_SIZE 1
+#define MCI_RCRCE_OFFSET 18
+#define MCI_RCRCE_SIZE 1
+#define MCI_RENDE_OFFSET 19
+#define MCI_RENDE_SIZE 1
+#define MCI_RTOE_OFFSET 20
+#define MCI_RTOE_SIZE 1
+#define MCI_DCRCE_OFFSET 21
+#define MCI_DCRCE_SIZE 1
+#define MCI_DTOE_OFFSET 22
+#define MCI_DTOE_SIZE 1
+#define MCI_OVRE_OFFSET 30
+#define MCI_OVRE_SIZE 1
+#define MCI_UNRE_OFFSET 31
+#define MCI_UNRE_SIZE 1
+
+/* Constants for DTOMUL */
+#define MCI_DTOMUL_1_CYCLE 0
+#define MCI_DTOMUL_16_CYCLES 1
+#define MCI_DTOMUL_128_CYCLES 2
+#define MCI_DTOMUL_256_CYCLES 3
+#define MCI_DTOMUL_1024_CYCLES 4
+#define MCI_DTOMUL_4096_CYCLES 5
+#define MCI_DTOMUL_65536_CYCLES 6
+#define MCI_DTOMUL_1048576_CYCLES 7
+
+/* Constants for RSPTYP */
+#define MCI_RSPTYP_NO_RESP 0
+#define MCI_RSPTYP_48_BIT 1
+#define MCI_RSPTYP_136_BIT 2
+
+/* Constants for SPCMD */
+#define MCI_SPCMD_NO_SPEC_CMD 0
+#define MCI_SPCMD_INIT_CMD 1
+#define MCI_SPCMD_SYNC_CMD 2
+#define MCI_SPCMD_INT_CMD 4
+#define MCI_SPCMD_INT_RESP 5
+
+/* Constants for TRCMD */
+#define MCI_TRCMD_NO_TRANS 0
+#define MCI_TRCMD_START_TRANS 1
+#define MCI_TRCMD_STOP_TRANS 2
+
+/* Constants for TRTYP */
+#define MCI_TRTYP_BLOCK 0
+#define MCI_TRTYP_MULTI_BLOCK 1
+#define MCI_TRTYP_STREAM 2
+
+/* Bit manipulation macros */
+#define MCI_BIT(name) \
+ (1 << MCI_##name##_OFFSET)
+#define MCI_BF(name,value) \
+ (((value) & ((1 << MCI_##name##_SIZE) - 1)) \
+ << MCI_##name##_OFFSET)
+#define MCI_BFEXT(name,value) \
+ (((value) >> MCI_##name##_OFFSET) \
+ & ((1 << MCI_##name##_SIZE) - 1))
+#define MCI_BFINS(name,value,old) \
+ (((old) & ~(((1 << MCI_##name##_SIZE) - 1) \
+ << MCI_##name##_OFFSET)) \
+ | MCI_BF(name,value))
+
+/* Register access macros */
+#define mci_readl(port,reg) \
+ __raw_readl((port)->regs + MCI_##reg)
+#define mci_writel(port,reg,value) \
+ __raw_writel((value), (port)->regs + MCI_##reg)
+
+#endif /* __DRIVERS_MMC_ATMEL_MCI_H__ */
diff --exclude=.git -urN linux-2.6.25.6/drivers/mmc/host/Kconfig avr32-2.6/drivers/mmc/host/Kconfig
--- linux-2.6.25.6/drivers/mmc/host/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mmc/host/Kconfig 2008-06-12 15:09:41.083816184 +0200
@@ -91,6 +91,16 @@
If unsure, say N.
+config MMC_ATMELMCI
+ tristate "Atmel Multimedia Card Interface support"
+ depends on AVR32 && MMC
+ help
+ This selects the Atmel Multimedia Card Interface. If you have
+ a AT91 (ARM) or AT32 (AVR32) platform with a Multimedia Card
+ slot, say Y or M here.
+
+ If unsure, say N.
+
config MMC_IMX
tristate "Motorola i.MX Multimedia Card Interface support"
depends on ARCH_IMX
diff --exclude=.git -urN linux-2.6.25.6/drivers/mmc/host/Makefile avr32-2.6/drivers/mmc/host/Makefile
--- linux-2.6.25.6/drivers/mmc/host/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mmc/host/Makefile 2008-06-12 15:09:41.083816184 +0200
@@ -15,6 +15,7 @@
obj-$(CONFIG_MMC_AU1X) += au1xmmc.o
obj-$(CONFIG_MMC_OMAP) += omap.o
obj-$(CONFIG_MMC_AT91) += at91_mci.o
+obj-$(CONFIG_MMC_ATMELMCI) += atmel-mci.o
obj-$(CONFIG_MMC_TIFM_SD) += tifm_sd.o
obj-$(CONFIG_MMC_SPI) += mmc_spi.o
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/nand/at91_nand.c avr32-2.6/drivers/mtd/nand/at91_nand.c
--- linux-2.6.25.6/drivers/mtd/nand/at91_nand.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/nand/at91_nand.c 1970-01-01 01:00:00.000000000 +0100
@@ -1,236 +0,0 @@
-/*
- * drivers/mtd/nand/at91_nand.c
- *
- * Copyright (C) 2003 Rick Bronson
- *
- * Derived from drivers/mtd/nand/autcpu12.c
- * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
- *
- * Derived from drivers/mtd/spia.c
- * Copyright (C) 2000 Steven J. Hill (sjhill@cotw.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/partitions.h>
-
-#include <asm/io.h>
-#include <asm/sizes.h>
-
-#include <asm/hardware.h>
-#include <asm/arch/board.h>
-#include <asm/arch/gpio.h>
-
-struct at91_nand_host {
- struct nand_chip nand_chip;
- struct mtd_info mtd;
- void __iomem *io_base;
- struct at91_nand_data *board;
-};
-
-/*
- * Hardware specific access to control-lines
- */
-static void at91_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct at91_nand_host *host = nand_chip->priv;
-
- if (cmd == NAND_CMD_NONE)
- return;
-
- if (ctrl & NAND_CLE)
- writeb(cmd, host->io_base + (1 << host->board->cle));
- else
- writeb(cmd, host->io_base + (1 << host->board->ale));
-}
-
-/*
- * Read the Device Ready pin.
- */
-static int at91_nand_device_ready(struct mtd_info *mtd)
-{
- struct nand_chip *nand_chip = mtd->priv;
- struct at91_nand_host *host = nand_chip->priv;
-
- return at91_get_gpio_value(host->board->rdy_pin);
-}
-
-/*
- * Enable NAND.
- */
-static void at91_nand_enable(struct at91_nand_host *host)
-{
- if (host->board->enable_pin)
- at91_set_gpio_value(host->board->enable_pin, 0);
-}
-
-/*
- * Disable NAND.
- */
-static void at91_nand_disable(struct at91_nand_host *host)
-{
- if (host->board->enable_pin)
- at91_set_gpio_value(host->board->enable_pin, 1);
-}
-
-#ifdef CONFIG_MTD_PARTITIONS
-const char *part_probes[] = { "cmdlinepart", NULL };
-#endif
-
-/*
- * Probe for the NAND device.
- */
-static int __init at91_nand_probe(struct platform_device *pdev)
-{
- struct at91_nand_host *host;
- struct mtd_info *mtd;
- struct nand_chip *nand_chip;
- int res;
-
-#ifdef CONFIG_MTD_PARTITIONS
- struct mtd_partition *partitions = NULL;
- int num_partitions = 0;
-#endif
-
- /* Allocate memory for the device structure (and zero it) */
- host = kzalloc(sizeof(struct at91_nand_host), GFP_KERNEL);
- if (!host) {
- printk(KERN_ERR "at91_nand: failed to allocate device structure.\n");
- return -ENOMEM;
- }
-
- host->io_base = ioremap(pdev->resource[0].start,
- pdev->resource[0].end - pdev->resource[0].start + 1);
- if (host->io_base == NULL) {
- printk(KERN_ERR "at91_nand: ioremap failed\n");
- kfree(host);
- return -EIO;
- }
-
- mtd = &host->mtd;
- nand_chip = &host->nand_chip;
- host->board = pdev->dev.platform_data;
-
- nand_chip->priv = host; /* link the private data structures */
- mtd->priv = nand_chip;
- mtd->owner = THIS_MODULE;
-
- /* Set address of NAND IO lines */
- nand_chip->IO_ADDR_R = host->io_base;
- nand_chip->IO_ADDR_W = host->io_base;
- nand_chip->cmd_ctrl = at91_nand_cmd_ctrl;
-
- if (host->board->rdy_pin)
- nand_chip->dev_ready = at91_nand_device_ready;
-
- nand_chip->ecc.mode = NAND_ECC_SOFT; /* enable ECC */
- nand_chip->chip_delay = 20; /* 20us command delay time */
-
- if (host->board->bus_width_16) /* 16-bit bus width */
- nand_chip->options |= NAND_BUSWIDTH_16;
-
- platform_set_drvdata(pdev, host);
- at91_nand_enable(host);
-
- if (host->board->det_pin) {
- if (at91_get_gpio_value(host->board->det_pin)) {
- printk ("No SmartMedia card inserted.\n");
- res = ENXIO;
- goto out;
- }
- }
-
- /* Scan to find existance of the device */
- if (nand_scan(mtd, 1)) {
- res = -ENXIO;
- goto out;
- }
-
-#ifdef CONFIG_MTD_PARTITIONS
-#ifdef CONFIG_MTD_CMDLINE_PARTS
- mtd->name = "at91_nand";
- num_partitions = parse_mtd_partitions(mtd, part_probes,
- &partitions, 0);
-#endif
- if (num_partitions <= 0 && host->board->partition_info)
- partitions = host->board->partition_info(mtd->size,
- &num_partitions);
-
- if ((!partitions) || (num_partitions == 0)) {
- printk(KERN_ERR "at91_nand: No parititions defined, or unsupported device.\n");
- res = ENXIO;
- goto release;
- }
-
- res = add_mtd_partitions(mtd, partitions, num_partitions);
-#else
- res = add_mtd_device(mtd);
-#endif
-
- if (!res)
- return res;
-
-release:
- nand_release(mtd);
-out:
- at91_nand_disable(host);
- platform_set_drvdata(pdev, NULL);
- iounmap(host->io_base);
- kfree(host);
- return res;
-}
-
-/*
- * Remove a NAND device.
- */
-static int __devexit at91_nand_remove(struct platform_device *pdev)
-{
- struct at91_nand_host *host = platform_get_drvdata(pdev);
- struct mtd_info *mtd = &host->mtd;
-
- nand_release(mtd);
-
- at91_nand_disable(host);
-
- iounmap(host->io_base);
- kfree(host);
-
- return 0;
-}
-
-static struct platform_driver at91_nand_driver = {
- .probe = at91_nand_probe,
- .remove = at91_nand_remove,
- .driver = {
- .name = "at91_nand",
- .owner = THIS_MODULE,
- },
-};
-
-static int __init at91_nand_init(void)
-{
- return platform_driver_register(&at91_nand_driver);
-}
-
-
-static void __exit at91_nand_exit(void)
-{
- platform_driver_unregister(&at91_nand_driver);
-}
-
-
-module_init(at91_nand_init);
-module_exit(at91_nand_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Rick Bronson");
-MODULE_DESCRIPTION("NAND/SmartMedia driver for AT91RM9200");
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/nand/atmel_nand.c avr32-2.6/drivers/mtd/nand/atmel_nand.c
--- linux-2.6.25.6/drivers/mtd/nand/atmel_nand.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/mtd/nand/atmel_nand.c 2008-06-12 15:09:41.107815889 +0200
@@ -0,0 +1,650 @@
+/*
+ * Copyright (C) 2003 Rick Bronson
+ *
+ * Derived from drivers/mtd/nand/autcpu12.c
+ * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
+ *
+ * Derived from drivers/mtd/spia.c
+ * Copyright (C) 2000 Steven J. Hill (sjhill@cotw.com)
+ *
+ *
+ * Add Hardware ECC support for AT91SAM9260 / AT91SAM9263
+ * Richard Genoud (richard.genoud@gmail.com), Adeneo Copyright (C) 2007
+ *
+ * Derived from Das U-Boot source code
+ * (u-boot-1.1.5/board/atmel/at91sam9263ek/nand.c)
+ * (C) Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+
+#include <linux/gpio.h>
+#include <linux/io.h>
+
+#include <asm/arch/board.h>
+#include <asm/arch/cpu.h>
+
+#ifdef CONFIG_MTD_NAND_ATMEL_ECC_HW
+#define hard_ecc 1
+#else
+#define hard_ecc 0
+#endif
+
+#ifdef CONFIG_MTD_NAND_ATMEL_ECC_NONE
+#define no_ecc 1
+#else
+#define no_ecc 0
+#endif
+
+/* Register access macros */
+#define ecc_readl(add, reg) \
+ __raw_readl(add + ATMEL_ECC_##reg)
+#define ecc_writel(add, reg, value) \
+ __raw_writel((value), add + ATMEL_ECC_##reg)
+
+#include "atmel_nand_ecc.h" /* Hardware ECC registers */
+
+/* oob layout for large page size
+ * bad block info is on bytes 0 and 1
+ * the bytes have to be consecutives to avoid
+ * several NAND_CMD_RNDOUT during read
+ */
+static struct nand_ecclayout atmel_oobinfo_large = {
+ .eccbytes = 4,
+ .eccpos = {60, 61, 62, 63},
+ .oobfree = {
+ {2, 58}
+ },
+};
+
+/* oob layout for small page size
+ * bad block info is on bytes 4 and 5
+ * the bytes have to be consecutives to avoid
+ * several NAND_CMD_RNDOUT during read
+ */
+static struct nand_ecclayout atmel_oobinfo_small = {
+ .eccbytes = 4,
+ .eccpos = {0, 1, 2, 3},
+ .oobfree = {
+ {6, 10}
+ },
+};
+
+struct atmel_nand_host {
+ struct nand_chip nand_chip;
+ struct mtd_info mtd;
+ void __iomem *io_base;
+ struct atmel_nand_data *board;
+ struct device *dev;
+ void __iomem *ecc;
+};
+
+/*
+ * Enable NAND.
+ */
+static void atmel_nand_enable(struct atmel_nand_host *host)
+{
+ if (host->board->enable_pin)
+ gpio_set_value(host->board->enable_pin, 0);
+}
+
+/*
+ * Disable NAND.
+ */
+static void atmel_nand_disable(struct atmel_nand_host *host)
+{
+ if (host->board->enable_pin)
+ gpio_set_value(host->board->enable_pin, 1);
+}
+
+/*
+ * Hardware specific access to control-lines
+ */
+static void atmel_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct atmel_nand_host *host = nand_chip->priv;
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+ if (ctrl & NAND_NCE)
+ atmel_nand_enable(host);
+ else
+ atmel_nand_disable(host);
+ }
+ if (cmd == NAND_CMD_NONE)
+ return;
+
+ if (ctrl & NAND_CLE)
+ writeb(cmd, host->io_base + (1 << host->board->cle));
+ else
+ writeb(cmd, host->io_base + (1 << host->board->ale));
+}
+
+/*
+ * Read the Device Ready pin.
+ */
+static int atmel_nand_device_ready(struct mtd_info *mtd)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct atmel_nand_host *host = nand_chip->priv;
+
+ return gpio_get_value(host->board->rdy_pin);
+}
+
+/*
+ * Minimal-overhead PIO for data access.
+ */
+static void atmel_read_buf(struct mtd_info *mtd, u8 *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+
+ __raw_readsb(nand_chip->IO_ADDR_R, buf, len);
+}
+
+static void atmel_read_buf16(struct mtd_info *mtd, u8 *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+
+ __raw_readsw(nand_chip->IO_ADDR_R, buf, len / 2);
+}
+
+static void atmel_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+
+ __raw_writesb(nand_chip->IO_ADDR_W, buf, len);
+}
+
+static void atmel_write_buf16(struct mtd_info *mtd, const u8 *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+
+ __raw_writesw(nand_chip->IO_ADDR_W, buf, len / 2);
+}
+
+/*
+ * write oob for small pages
+ */
+static int atmel_nand_write_oob_512(struct mtd_info *mtd,
+ struct nand_chip *chip, int page)
+{
+ int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
+ int eccsize = chip->ecc.size, length = mtd->oobsize;
+ int len, pos, status = 0;
+ const uint8_t *bufpoi = chip->oob_poi;
+
+ pos = eccsize + chunk;
+
+ chip->cmdfunc(mtd, NAND_CMD_SEQIN, pos, page);
+ len = min_t(int, length, chunk);
+ chip->write_buf(mtd, bufpoi, len);
+ bufpoi += len;
+ length -= len;
+ if (length > 0)
+ chip->write_buf(mtd, bufpoi, length);
+
+ chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+ status = chip->waitfunc(mtd, chip);
+
+ return status & NAND_STATUS_FAIL ? -EIO : 0;
+
+}
+
+/*
+ * read oob for small pages
+ */
+static int atmel_nand_read_oob_512(struct mtd_info *mtd,
+ struct nand_chip *chip, int page, int sndcmd)
+{
+ if (sndcmd) {
+ chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
+ sndcmd = 0;
+ }
+ chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
+ return sndcmd;
+}
+
+/*
+ * Calculate HW ECC
+ *
+ * function called after a write
+ *
+ * mtd: MTD block structure
+ * dat: raw data (unused)
+ * ecc_code: buffer for ECC
+ */
+static int atmel_nand_calculate(struct mtd_info *mtd,
+ const u_char *dat, unsigned char *ecc_code)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct atmel_nand_host *host = nand_chip->priv;
+ uint32_t *eccpos = nand_chip->ecc.layout->eccpos;
+ unsigned int ecc_value;
+
+ /* get the first 2 ECC bytes */
+ ecc_value = ecc_readl(host->ecc, PR);
+
+ ecc_code[eccpos[0]] = ecc_value & 0xFF;
+ ecc_code[eccpos[1]] = (ecc_value >> 8) & 0xFF;
+
+ /* get the last 2 ECC bytes */
+ ecc_value = ecc_readl(host->ecc, NPR) & ATMEL_ECC_NPARITY;
+
+ ecc_code[eccpos[2]] = ecc_value & 0xFF;
+ ecc_code[eccpos[3]] = (ecc_value >> 8) & 0xFF;
+
+ return 0;
+}
+
+/*
+ * HW ECC read page function
+ *
+ * mtd: mtd info structure
+ * chip: nand chip info structure
+ * buf: buffer to store read data
+ */
+static int atmel_nand_read_page(struct mtd_info *mtd,
+ struct nand_chip *chip, uint8_t *buf)
+{
+ int eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ uint32_t *eccpos = chip->ecc.layout->eccpos;
+ uint8_t *p = buf;
+ uint8_t *oob = chip->oob_poi;
+ uint8_t *ecc_pos;
+ int stat;
+
+ /*
+ * Errata: ALE is incorrectly wired up to the ECC controller
+ * on the AP7000, so it will include the address cycles in the
+ * ECC calculation.
+ *
+ * Workaround: Reset the parity registers before reading the
+ * actual data.
+ */
+ if (cpu_is_at32ap7000()) {
+ struct atmel_nand_host *host = chip->priv;
+ ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
+ }
+
+ /* read the page */
+ chip->read_buf(mtd, p, eccsize);
+
+ /* move to ECC position if needed */
+ if (eccpos[0] != 0) {
+ /* This only works on large pages
+ * because the ECC controller waits for
+ * NAND_CMD_RNDOUTSTART after the
+ * NAND_CMD_RNDOUT.
+ * anyway, for small pages, the eccpos[0] == 0
+ */
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT,
+ mtd->writesize + eccpos[0], -1);
+ }
+
+ /* the ECC controller needs to read the ECC just after the data */
+ ecc_pos = oob + eccpos[0];
+ chip->read_buf(mtd, ecc_pos, eccbytes);
+
+ /* check if there's an error */
+ stat = chip->ecc.correct(mtd, p, oob, NULL);
+
+ if (stat < 0)
+ mtd->ecc_stats.failed++;
+ else
+ mtd->ecc_stats.corrected += stat;
+
+ /* get back to oob start (end of page) */
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, mtd->writesize, -1);
+
+ /* read the oob */
+ chip->read_buf(mtd, oob, mtd->oobsize);
+
+ return 0;
+}
+
+/*
+ * HW ECC Correction
+ *
+ * function called after a read
+ *
+ * mtd: MTD block structure
+ * dat: raw data read from the chip
+ * read_ecc: ECC from the chip (unused)
+ * isnull: unused
+ *
+ * Detect and correct a 1 bit error for a page
+ */
+static int atmel_nand_correct(struct mtd_info *mtd, u_char *dat,
+ u_char *read_ecc, u_char *isnull)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct atmel_nand_host *host = nand_chip->priv;
+ unsigned int ecc_status;
+ unsigned int ecc_word, ecc_bit;
+
+ /* get the status from the Status Register */
+ ecc_status = ecc_readl(host->ecc, SR);
+
+ /* if there's no error */
+ if (likely(!(ecc_status & ATMEL_ECC_RECERR)))
+ return 0;
+
+ /* get error bit offset (4 bits) */
+ ecc_bit = ecc_readl(host->ecc, PR) & ATMEL_ECC_BITADDR;
+ /* get word address (12 bits) */
+ ecc_word = ecc_readl(host->ecc, PR) & ATMEL_ECC_WORDADDR;
+ ecc_word >>= 4;
+
+ /* if there are multiple errors */
+ if (ecc_status & ATMEL_ECC_MULERR) {
+ /* check if it is a freshly erased block
+ * (filled with 0xff) */
+ if ((ecc_bit == ATMEL_ECC_BITADDR)
+ && (ecc_word == (ATMEL_ECC_WORDADDR >> 4))) {
+ /* the block has just been erased, return OK */
+ return 0;
+ }
+ /* it doesn't seems to be a freshly
+ * erased block.
+ * We can't correct so many errors */
+ dev_dbg(host->dev, "atmel_nand : multiple errors detected."
+ " Unable to correct.\n");
+ return -EIO;
+ }
+
+ /* if there's a single bit error : we can correct it */
+ if (ecc_status & ATMEL_ECC_ECCERR) {
+ /* there's nothing much to do here.
+ * the bit error is on the ECC itself.
+ */
+ dev_dbg(host->dev, "atmel_nand : one bit error on ECC code."
+ " Nothing to correct\n");
+ return 0;
+ }
+
+ dev_dbg(host->dev, "atmel_nand : one bit error on data."
+ " (word offset in the page :"
+ " 0x%x bit offset : 0x%x)\n",
+ ecc_word, ecc_bit);
+ /* correct the error */
+ if (nand_chip->options & NAND_BUSWIDTH_16) {
+ /* 16 bits words */
+ ((unsigned short *) dat)[ecc_word] ^= (1 << ecc_bit);
+ } else {
+ /* 8 bits words */
+ dat[ecc_word] ^= (1 << ecc_bit);
+ }
+ dev_dbg(host->dev, "atmel_nand : error corrected\n");
+ return 1;
+}
+
+/*
+ * Enable HW ECC : unused on most chips
+ */
+static void atmel_nand_hwctl(struct mtd_info *mtd, int mode)
+{
+ if (cpu_is_at32ap7000()) {
+ struct nand_chip *nand_chip = mtd->priv;
+ struct atmel_nand_host *host = nand_chip->priv;
+ ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
+ }
+}
+
+#ifdef CONFIG_MTD_PARTITIONS
+static const char *part_probes[] = { "cmdlinepart", NULL };
+#endif
+
+/*
+ * Probe for the NAND device.
+ */
+static int __init atmel_nand_probe(struct platform_device *pdev)
+{
+ struct atmel_nand_host *host;
+ struct mtd_info *mtd;
+ struct nand_chip *nand_chip;
+ struct resource *regs;
+ struct resource *mem;
+ int res;
+
+#ifdef CONFIG_MTD_PARTITIONS
+ struct mtd_partition *partitions = NULL;
+ int num_partitions = 0;
+#endif
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem) {
+ printk(KERN_ERR "atmel_nand: can't get I/O resource mem\n");
+ return -ENXIO;
+ }
+
+ /* Allocate memory for the device structure (and zero it) */
+ host = kzalloc(sizeof(struct atmel_nand_host), GFP_KERNEL);
+ if (!host) {
+ printk(KERN_ERR "atmel_nand: failed to allocate device structure.\n");
+ return -ENOMEM;
+ }
+
+ host->io_base = ioremap(mem->start, mem->end - mem->start + 1);
+ if (host->io_base == NULL) {
+ printk(KERN_ERR "atmel_nand: ioremap failed\n");
+ res = -EIO;
+ goto err_nand_ioremap;
+ }
+
+ mtd = &host->mtd;
+ nand_chip = &host->nand_chip;
+ host->board = pdev->dev.platform_data;
+ host->dev = &pdev->dev;
+
+ nand_chip->priv = host; /* link the private data structures */
+ mtd->priv = nand_chip;
+ mtd->owner = THIS_MODULE;
+
+ /* Set address of NAND IO lines */
+ nand_chip->IO_ADDR_R = host->io_base;
+ nand_chip->IO_ADDR_W = host->io_base;
+ nand_chip->cmd_ctrl = atmel_nand_cmd_ctrl;
+
+ if (host->board->rdy_pin)
+ nand_chip->dev_ready = atmel_nand_device_ready;
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!regs && hard_ecc) {
+ printk(KERN_ERR "atmel_nand: can't get I/O resource "
+ "regs\nFalling back on software ECC\n");
+ }
+
+ nand_chip->ecc.mode = NAND_ECC_SOFT; /* enable ECC */
+ if (no_ecc)
+ nand_chip->ecc.mode = NAND_ECC_NONE;
+ if (hard_ecc && regs) {
+ host->ecc = ioremap(regs->start, regs->end - regs->start + 1);
+ if (host->ecc == NULL) {
+ printk(KERN_ERR "atmel_nand: ioremap failed\n");
+ res = -EIO;
+ goto err_ecc_ioremap;
+ }
+ nand_chip->ecc.mode = NAND_ECC_HW_SYNDROME;
+ nand_chip->ecc.calculate = atmel_nand_calculate;
+ nand_chip->ecc.correct = atmel_nand_correct;
+ nand_chip->ecc.hwctl = atmel_nand_hwctl;
+ nand_chip->ecc.read_page = atmel_nand_read_page;
+ nand_chip->ecc.bytes = 4;
+ nand_chip->ecc.prepad = 0;
+ nand_chip->ecc.postpad = 0;
+ }
+
+ nand_chip->chip_delay = 20; /* 20us command delay time */
+
+ if (host->board->bus_width_16) { /* 16-bit bus width */
+ nand_chip->options |= NAND_BUSWIDTH_16;
+ nand_chip->read_buf = atmel_read_buf16;
+ nand_chip->write_buf = atmel_write_buf16;
+ } else {
+ nand_chip->read_buf = atmel_read_buf;
+ nand_chip->write_buf = atmel_write_buf;
+ }
+
+ platform_set_drvdata(pdev, host);
+ atmel_nand_enable(host);
+
+ if (host->board->det_pin) {
+ if (gpio_get_value(host->board->det_pin)) {
+ printk("No SmartMedia card inserted.\n");
+ res = ENXIO;
+ goto err_no_card;
+ }
+ }
+
+ /* first scan to find the device and get the page size */
+ if (nand_scan_ident(mtd, 1)) {
+ res = -ENXIO;
+ goto err_scan_ident;
+ }
+
+ if (nand_chip->ecc.mode == NAND_ECC_HW_SYNDROME) {
+ /* ECC is calculated for the whole page (1 step) */
+ nand_chip->ecc.size = mtd->writesize;
+
+ /* set ECC page size and oob layout */
+ switch (mtd->writesize) {
+ case 512:
+ nand_chip->ecc.layout = &atmel_oobinfo_small;
+ nand_chip->ecc.read_oob = atmel_nand_read_oob_512;
+ nand_chip->ecc.write_oob = atmel_nand_write_oob_512;
+ ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_528);
+ break;
+ case 1024:
+ nand_chip->ecc.layout = &atmel_oobinfo_large;
+ ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_1056);
+ break;
+ case 2048:
+ nand_chip->ecc.layout = &atmel_oobinfo_large;
+ ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_2112);
+ break;
+ case 4096:
+ nand_chip->ecc.layout = &atmel_oobinfo_large;
+ ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_4224);
+ break;
+ default:
+ /* page size not handled by HW ECC */
+ /* switching back to soft ECC */
+ nand_chip->ecc.mode = NAND_ECC_SOFT;
+ nand_chip->ecc.calculate = NULL;
+ nand_chip->ecc.correct = NULL;
+ nand_chip->ecc.hwctl = NULL;
+ nand_chip->ecc.read_page = NULL;
+ nand_chip->ecc.postpad = 0;
+ nand_chip->ecc.prepad = 0;
+ nand_chip->ecc.bytes = 0;
+ break;
+ }
+ }
+
+ /* second phase scan */
+ if (nand_scan_tail(mtd)) {
+ res = -ENXIO;
+ goto err_scan_tail;
+ }
+
+#ifdef CONFIG_MTD_PARTITIONS
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+ mtd->name = "atmel_nand";
+ num_partitions = parse_mtd_partitions(mtd, part_probes,
+ &partitions, 0);
+#endif
+ if (num_partitions <= 0 && host->board->partition_info)
+ partitions = host->board->partition_info(mtd->size,
+ &num_partitions);
+
+ if ((!partitions) || (num_partitions == 0)) {
+ printk(KERN_ERR "atmel_nand: No parititions defined, or unsupported device.\n");
+ res = ENXIO;
+ goto err_no_partitions;
+ }
+
+ res = add_mtd_partitions(mtd, partitions, num_partitions);
+#else
+ res = add_mtd_device(mtd);
+#endif
+
+ if (!res)
+ return res;
+
+#ifdef CONFIG_MTD_PARTITIONS
+err_no_partitions:
+#endif
+ nand_release(mtd);
+err_scan_tail:
+err_scan_ident:
+err_no_card:
+ atmel_nand_disable(host);
+ platform_set_drvdata(pdev, NULL);
+ if (host->ecc)
+ iounmap(host->ecc);
+err_ecc_ioremap:
+ iounmap(host->io_base);
+err_nand_ioremap:
+ kfree(host);
+ return res;
+}
+
+/*
+ * Remove a NAND device.
+ */
+static int __exit atmel_nand_remove(struct platform_device *pdev)
+{
+ struct atmel_nand_host *host = platform_get_drvdata(pdev);
+ struct mtd_info *mtd = &host->mtd;
+
+ nand_release(mtd);
+
+ atmel_nand_disable(host);
+
+ if (host->ecc)
+ iounmap(host->ecc);
+ iounmap(host->io_base);
+ kfree(host);
+
+ return 0;
+}
+
+static struct platform_driver atmel_nand_driver = {
+ .remove = __exit_p(atmel_nand_remove),
+ .driver = {
+ .name = "atmel_nand",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init atmel_nand_init(void)
+{
+ return platform_driver_probe(&atmel_nand_driver, atmel_nand_probe);
+}
+
+
+static void __exit atmel_nand_exit(void)
+{
+ platform_driver_unregister(&atmel_nand_driver);
+}
+
+
+module_init(atmel_nand_init);
+module_exit(atmel_nand_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Rick Bronson");
+MODULE_DESCRIPTION("NAND/SmartMedia driver for AT91 / AVR32");
+MODULE_ALIAS("platform:atmel_nand");
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/nand/atmel_nand_ecc.h avr32-2.6/drivers/mtd/nand/atmel_nand_ecc.h
--- linux-2.6.25.6/drivers/mtd/nand/atmel_nand_ecc.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/mtd/nand/atmel_nand_ecc.h 2008-06-12 15:09:41.111815840 +0200
@@ -0,0 +1,36 @@
+/*
+ * Error Corrected Code Controller (ECC) - System peripherals regsters.
+ * Based on AT91SAM9260 datasheet revision B.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef ATMEL_NAND_ECC_H
+#define ATMEL_NAND_ECC_H
+
+#define ATMEL_ECC_CR 0x00 /* Control register */
+#define ATMEL_ECC_RST (1 << 0) /* Reset parity */
+
+#define ATMEL_ECC_MR 0x04 /* Mode register */
+#define ATMEL_ECC_PAGESIZE (3 << 0) /* Page Size */
+#define ATMEL_ECC_PAGESIZE_528 (0)
+#define ATMEL_ECC_PAGESIZE_1056 (1)
+#define ATMEL_ECC_PAGESIZE_2112 (2)
+#define ATMEL_ECC_PAGESIZE_4224 (3)
+
+#define ATMEL_ECC_SR 0x08 /* Status register */
+#define ATMEL_ECC_RECERR (1 << 0) /* Recoverable Error */
+#define ATMEL_ECC_ECCERR (1 << 1) /* ECC Single Bit Error */
+#define ATMEL_ECC_MULERR (1 << 2) /* Multiple Errors */
+
+#define ATMEL_ECC_PR 0x0c /* Parity register */
+#define ATMEL_ECC_BITADDR (0xf << 0) /* Bit Error Address */
+#define ATMEL_ECC_WORDADDR (0xfff << 4) /* Word Error Address */
+
+#define ATMEL_ECC_NPR 0x10 /* NParity register */
+#define ATMEL_ECC_NPARITY (0xffff << 0) /* NParity */
+
+#endif
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/nand/bf5xx_nand.c avr32-2.6/drivers/mtd/nand/bf5xx_nand.c
--- linux-2.6.25.6/drivers/mtd/nand/bf5xx_nand.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/nand/bf5xx_nand.c 2008-06-12 15:09:41.111815840 +0200
@@ -803,3 +803,4 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR(DRV_AUTHOR);
MODULE_DESCRIPTION(DRV_DESC);
+MODULE_ALIAS("platform:" DRV_NAME);
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/nand/Kconfig avr32-2.6/drivers/mtd/nand/Kconfig
--- linux-2.6.25.6/drivers/mtd/nand/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/nand/Kconfig 2008-06-12 15:09:41.107815889 +0200
@@ -272,12 +272,54 @@
If you say "m", the module will be called "cs553x_nand.ko".
-config MTD_NAND_AT91
- bool "Support for NAND Flash / SmartMedia on AT91"
- depends on ARCH_AT91
+config MTD_NAND_ATMEL
+ bool "Support for NAND Flash / SmartMedia on AT91 and AVR32"
+ depends on ARCH_AT91 || AVR32
help
Enables support for NAND Flash / Smart Media Card interface
- on Atmel AT91 processors.
+ on Atmel AT91 and AVR32 processors.
+choice
+ prompt "ECC management for NAND Flash / SmartMedia on AT91 / AVR32"
+ depends on MTD_NAND_ATMEL
+
+config MTD_NAND_ATMEL_ECC_HW
+ bool "Hardware ECC"
+ depends on ARCH_AT91SAM9263 || ARCH_AT91SAM9260 || AVR32
+ help
+ Use hardware ECC instead of software ECC when the chip
+ supports it.
+
+ The hardware ECC controller is capable of single bit error
+ correction and 2-bit random detection per page.
+
+ NB : hardware and software ECC schemes are incompatible.
+ If you switch from one to another, you'll have to erase your
+ mtd partition.
+
+ If unsure, say Y
+
+config MTD_NAND_ATMEL_ECC_SOFT
+ bool "Software ECC"
+ help
+ Use software ECC.
+
+ NB : hardware and software ECC schemes are incompatible.
+ If you switch from one to another, you'll have to erase your
+ mtd partition.
+
+config MTD_NAND_ATMEL_ECC_NONE
+ bool "No ECC (testing only, DANGEROUS)"
+ depends on DEBUG_KERNEL
+ help
+ No ECC will be used.
+ It's not a good idea and it should be reserved for testing
+ purpose only.
+
+ If unsure, say N
+
+ endchoice
+
+endchoice
config MTD_NAND_CM_X270
tristate "Support for NAND Flash on CM-X270 modules"
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/nand/Makefile avr32-2.6/drivers/mtd/nand/Makefile
--- linux-2.6.25.6/drivers/mtd/nand/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/nand/Makefile 2008-06-12 15:09:41.107815889 +0200
@@ -24,7 +24,7 @@
obj-$(CONFIG_MTD_NAND_NANDSIM) += nandsim.o
obj-$(CONFIG_MTD_NAND_CS553X) += cs553x_nand.o
obj-$(CONFIG_MTD_NAND_NDFC) += ndfc.o
-obj-$(CONFIG_MTD_NAND_AT91) += at91_nand.o
+obj-$(CONFIG_MTD_NAND_ATMEL) += atmel_nand.o
obj-$(CONFIG_MTD_NAND_CM_X270) += cmx270_nand.o
obj-$(CONFIG_MTD_NAND_BASLER_EXCITE) += excite_nandflash.o
obj-$(CONFIG_MTD_NAND_PLATFORM) += plat_nand.o
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/nand/ndfc.c avr32-2.6/drivers/mtd/nand/ndfc.c
--- linux-2.6.25.6/drivers/mtd/nand/ndfc.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/nand/ndfc.c 2008-06-12 15:03:59.579815954 +0200
@@ -317,3 +317,5 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
MODULE_DESCRIPTION("Platform driver for NDFC");
+MODULE_ALIAS("platform:ndfc-chip");
+MODULE_ALIAS("platform:ndfc-nand");
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/nand/orion_nand.c avr32-2.6/drivers/mtd/nand/orion_nand.c
--- linux-2.6.25.6/drivers/mtd/nand/orion_nand.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/nand/orion_nand.c 2008-06-12 15:09:41.115816070 +0200
@@ -169,3 +169,4 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Tzachi Perelstein");
MODULE_DESCRIPTION("NAND glue for Orion platforms");
+MODULE_ALIAS("platform:orion_nand");
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/nand/plat_nand.c avr32-2.6/drivers/mtd/nand/plat_nand.c
--- linux-2.6.25.6/drivers/mtd/nand/plat_nand.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/nand/plat_nand.c 2008-06-12 15:09:41.115816070 +0200
@@ -150,3 +150,4 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Vitaly Wool");
MODULE_DESCRIPTION("Simple generic NAND driver");
+MODULE_ALIAS("platform:gen_nand");
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/nand/s3c2410.c avr32-2.6/drivers/mtd/nand/s3c2410.c
--- linux-2.6.25.6/drivers/mtd/nand/s3c2410.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/nand/s3c2410.c 2008-06-12 15:09:41.115816070 +0200
@@ -927,3 +927,6 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
MODULE_DESCRIPTION("S3C24XX MTD NAND driver");
+MODULE_ALIAS("platform:s3c2410-nand");
+MODULE_ALIAS("platform:s3c2412-nand");
+MODULE_ALIAS("platform:s3c2440-nand");
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/build.c avr32-2.6/drivers/mtd/ubi/build.c
--- linux-2.6.25.6/drivers/mtd/ubi/build.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/build.c 2008-06-12 15:09:41.119815462 +0200
@@ -355,15 +355,34 @@
}
/**
+ * free_user_volumes - free all user volumes.
+ * @ubi: UBI device description object
+ *
+ * Normally the volumes are freed at the release function of the volume device
+ * objects. However, on error paths the volumes have to be freed before the
+ * device objects have been initialized.
+ */
+static void free_user_volumes(struct ubi_device *ubi)
+{
+ int i;
+
+ for (i = 0; i < ubi->vtbl_slots; i++)
+ if (ubi->volumes[i]) {
+ kfree(ubi->volumes[i]->eba_tbl);
+ kfree(ubi->volumes[i]);
+ }
+}
+
+/**
* uif_init - initialize user interfaces for an UBI device.
* @ubi: UBI device description object
*
* This function returns zero in case of success and a negative error code in
- * case of failure.
+ * case of failure. Note, this function destroys all volumes if it failes.
*/
static int uif_init(struct ubi_device *ubi)
{
- int i, err;
+ int i, err, do_free = 0;
dev_t dev;
sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num);
@@ -410,10 +429,13 @@
out_volumes:
kill_volumes(ubi);
+ do_free = 0;
out_sysfs:
ubi_sysfs_close(ubi);
cdev_del(&ubi->cdev);
out_unreg:
+ if (do_free)
+ free_user_volumes(ubi);
unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
ubi_err("cannot initialize UBI %s, error %d", ubi->ubi_name, err);
return err;
@@ -422,6 +444,10 @@
/**
* uif_close - close user interfaces for an UBI device.
* @ubi: UBI device description object
+ *
+ * Note, since this function un-registers UBI volume device objects (@vol->dev),
+ * the memory allocated voe the volumes is freed as well (in the release
+ * function).
*/
static void uif_close(struct ubi_device *ubi)
{
@@ -432,6 +458,21 @@
}
/**
+ * free_internal_volumes - free internal volumes.
+ * @ubi: UBI device description object
+ */
+static void free_internal_volumes(struct ubi_device *ubi)
+{
+ int i;
+
+ for (i = ubi->vtbl_slots;
+ i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
+ kfree(ubi->volumes[i]->eba_tbl);
+ kfree(ubi->volumes[i]);
+ }
+}
+
+/**
* attach_by_scanning - attach an MTD device using scanning method.
* @ubi: UBI device descriptor
*
@@ -475,6 +516,7 @@
out_wl:
ubi_wl_close(ubi);
out_vtbl:
+ free_internal_volumes(ubi);
vfree(ubi->vtbl);
out_si:
ubi_scan_destroy_si(si);
@@ -530,7 +572,11 @@
ubi->min_io_size = ubi->mtd->writesize;
ubi->hdrs_min_io_size = ubi->mtd->writesize >> ubi->mtd->subpage_sft;
- /* Make sure minimal I/O unit is power of 2 */
+ /*
+ * Make sure minimal I/O unit is power of 2. Note, there is no
+ * fundamental reason for this assumption. It is just an optimization
+ * which allows us to avoid costly division operations.
+ */
if (!is_power_of_2(ubi->min_io_size)) {
ubi_err("min. I/O unit (%d) is not power of 2",
ubi->min_io_size);
@@ -581,7 +627,7 @@
if (ubi->vid_hdr_offset < UBI_EC_HDR_SIZE ||
ubi->leb_start < ubi->vid_hdr_offset + UBI_VID_HDR_SIZE ||
ubi->leb_start > ubi->peb_size - UBI_VID_HDR_SIZE ||
- ubi->leb_start % ubi->min_io_size) {
+ ubi->leb_start & (ubi->min_io_size - 1)) {
ubi_err("bad VID header (%d) or data offsets (%d)",
ubi->vid_hdr_offset, ubi->leb_start);
return -EINVAL;
@@ -606,8 +652,16 @@
ubi->ro_mode = 1;
}
- dbg_msg("leb_size %d", ubi->leb_size);
- dbg_msg("ro_mode %d", ubi->ro_mode);
+ ubi_msg("physical eraseblock size: %d bytes (%d KiB)",
+ ubi->peb_size, ubi->peb_size >> 10);
+ ubi_msg("logical eraseblock size: %d bytes", ubi->leb_size);
+ ubi_msg("smallest flash I/O unit: %d", ubi->min_io_size);
+ if (ubi->hdrs_min_io_size != ubi->min_io_size)
+ ubi_msg("sub-page size: %d",
+ ubi->hdrs_min_io_size);
+ ubi_msg("VID header offset: %d (aligned %d)",
+ ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
+ ubi_msg("data offset: %d", ubi->leb_start);
/*
* Note, ideally, we have to initialize ubi->bad_peb_count here. But
@@ -638,7 +692,7 @@
/*
* Clear the auto-resize flag in the volume in-memory copy of the
- * volume table, and 'ubi_resize_volume()' will propogate this change
+ * volume table, and 'ubi_resize_volume()' will propagate this change
* to the flash.
*/
ubi->vtbl[vol_id].flags &= ~UBI_VTBL_AUTORESIZE_FLG;
@@ -647,7 +701,7 @@
struct ubi_vtbl_record vtbl_rec;
/*
- * No avalilable PEBs to re-size the volume, clear the flag on
+ * No available PEBs to re-size the volume, clear the flag on
* flash and exit.
*/
memcpy(&vtbl_rec, &ubi->vtbl[vol_id],
@@ -680,7 +734,7 @@
*
* This function attaches MTD device @mtd_dev to UBI and assign @ubi_num number
* to the newly created UBI device, unless @ubi_num is %UBI_DEV_NUM_AUTO, in
- * which case this function finds a vacant device nubert and assings it
+ * which case this function finds a vacant device number and assigns it
* automatically. Returns the new UBI device number in case of success and a
* negative error code in case of failure.
*
@@ -690,7 +744,7 @@
int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num, int vid_hdr_offset)
{
struct ubi_device *ubi;
- int i, err;
+ int i, err, do_free = 1;
/*
* Check if we already have the same MTD device attached.
@@ -755,8 +809,7 @@
mutex_init(&ubi->volumes_mutex);
spin_lock_init(&ubi->volumes_lock);
- dbg_msg("attaching mtd%d to ubi%d: VID header offset %d",
- mtd->index, ubi_num, vid_hdr_offset);
+ ubi_msg("attaching mtd%d to ubi%d", mtd->index, ubi_num);
err = io_init(ubi);
if (err)
@@ -791,7 +844,7 @@
err = uif_init(ubi);
if (err)
- goto out_detach;
+ goto out_nofree;
ubi->bgt_thread = kthread_create(ubi_thread, ubi, ubi->bgt_name);
if (IS_ERR(ubi->bgt_thread)) {
@@ -804,15 +857,8 @@
ubi_msg("attached mtd%d to ubi%d", mtd->index, ubi_num);
ubi_msg("MTD device name: \"%s\"", mtd->name);
ubi_msg("MTD device size: %llu MiB", ubi->flash_size >> 20);
- ubi_msg("physical eraseblock size: %d bytes (%d KiB)",
- ubi->peb_size, ubi->peb_size >> 10);
- ubi_msg("logical eraseblock size: %d bytes", ubi->leb_size);
ubi_msg("number of good PEBs: %d", ubi->good_peb_count);
ubi_msg("number of bad PEBs: %d", ubi->bad_peb_count);
- ubi_msg("smallest flash I/O unit: %d", ubi->min_io_size);
- ubi_msg("VID header offset: %d (aligned %d)",
- ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
- ubi_msg("data offset: %d", ubi->leb_start);
ubi_msg("max. allowed volumes: %d", ubi->vtbl_slots);
ubi_msg("wear-leveling threshold: %d", CONFIG_MTD_UBI_WL_THRESHOLD);
ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);
@@ -835,9 +881,13 @@
out_uif:
uif_close(ubi);
+out_nofree:
+ do_free = 0;
out_detach:
- ubi_eba_close(ubi);
ubi_wl_close(ubi);
+ if (do_free)
+ free_user_volumes(ubi);
+ free_internal_volumes(ubi);
vfree(ubi->vtbl);
out_free:
vfree(ubi->peb_buf1);
@@ -899,8 +949,8 @@
kthread_stop(ubi->bgt_thread);
uif_close(ubi);
- ubi_eba_close(ubi);
ubi_wl_close(ubi);
+ free_internal_volumes(ubi);
vfree(ubi->vtbl);
put_mtd_device(ubi->mtd);
vfree(ubi->peb_buf1);
@@ -950,8 +1000,7 @@
BUILD_BUG_ON(sizeof(struct ubi_vid_hdr) != 64);
if (mtd_devs > UBI_MAX_DEVICES) {
- printk(KERN_ERR "UBI error: too many MTD devices, "
- "maximum is %d\n", UBI_MAX_DEVICES);
+ ubi_err("too many MTD devices, maximum is %d", UBI_MAX_DEVICES);
return -EINVAL;
}
@@ -959,25 +1008,25 @@
ubi_class = class_create(THIS_MODULE, UBI_NAME_STR);
if (IS_ERR(ubi_class)) {
err = PTR_ERR(ubi_class);
- printk(KERN_ERR "UBI error: cannot create UBI class\n");
+ ubi_err("cannot create UBI class");
goto out;
}
err = class_create_file(ubi_class, &ubi_version);
if (err) {
- printk(KERN_ERR "UBI error: cannot create sysfs file\n");
+ ubi_err("cannot create sysfs file");
goto out_class;
}
err = misc_register(&ubi_ctrl_cdev);
if (err) {
- printk(KERN_ERR "UBI error: cannot register device\n");
+ ubi_err("cannot register device");
goto out_version;
}
ubi_wl_entry_slab = kmem_cache_create("ubi_wl_entry_slab",
- sizeof(struct ubi_wl_entry),
- 0, 0, NULL);
+ sizeof(struct ubi_wl_entry),
+ 0, 0, NULL);
if (!ubi_wl_entry_slab)
goto out_dev_unreg;
@@ -1000,8 +1049,7 @@
mutex_unlock(&ubi_devices_mutex);
if (err < 0) {
put_mtd_device(mtd);
- printk(KERN_ERR "UBI error: cannot attach mtd%d\n",
- mtd->index);
+ ubi_err("cannot attach mtd%d", mtd->index);
goto out_detach;
}
}
@@ -1023,7 +1071,7 @@
out_class:
class_destroy(ubi_class);
out:
- printk(KERN_ERR "UBI error: cannot initialize UBI, error %d\n", err);
+ ubi_err("UBI error: cannot initialize UBI, error %d", err);
return err;
}
module_init(ubi_init);
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/cdev.c avr32-2.6/drivers/mtd/ubi/cdev.c
--- linux-2.6.25.6/drivers/mtd/ubi/cdev.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/cdev.c 2008-06-12 15:09:41.119815462 +0200
@@ -290,7 +290,7 @@
off = do_div(tmp, vol->usable_leb_size);
lnum = tmp;
- if (off % ubi->min_io_size) {
+ if (off & (ubi->min_io_size - 1)) {
dbg_err("unaligned position");
return -EINVAL;
}
@@ -299,7 +299,7 @@
count_save = count = vol->used_bytes - *offp;
/* We can write only in fractions of the minimum I/O unit */
- if (count % ubi->min_io_size) {
+ if (count & (ubi->min_io_size - 1)) {
dbg_err("unaligned write length");
return -EINVAL;
}
@@ -559,7 +559,7 @@
if (req->alignment > ubi->leb_size)
goto bad;
- n = req->alignment % ubi->min_io_size;
+ n = req->alignment & (ubi->min_io_size - 1);
if (req->alignment != 1 && n)
goto bad;
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/debug.h avr32-2.6/drivers/mtd/ubi/debug.h
--- linux-2.6.25.6/drivers/mtd/ubi/debug.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/debug.h 2008-06-12 15:09:41.123815692 +0200
@@ -99,8 +99,10 @@
#ifdef CONFIG_MTD_UBI_DEBUG_MSG_BLD
/* Initialization and build messages */
#define dbg_bld(fmt, ...) dbg_msg(fmt, ##__VA_ARGS__)
+#define UBI_IO_DEBUG 1
#else
#define dbg_bld(fmt, ...) ({})
+#define UBI_IO_DEBUG 0
#endif
#ifdef CONFIG_MTD_UBI_DEBUG_EMULATE_BITFLIPS
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/eba.c avr32-2.6/drivers/mtd/ubi/eba.c
--- linux-2.6.25.6/drivers/mtd/ubi/eba.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/eba.c 2008-06-12 15:09:41.123815692 +0200
@@ -752,7 +752,7 @@
/* If this is the last LEB @len may be unaligned */
len = ALIGN(data_size, ubi->min_io_size);
else
- ubi_assert(len % ubi->min_io_size == 0);
+ ubi_assert(!(len & (ubi->min_io_size - 1)));
vid_hdr = ubi_zalloc_vid_hdr(ubi, GFP_NOFS);
if (!vid_hdr)
@@ -1233,20 +1233,3 @@
}
return err;
}
-
-/**
- * ubi_eba_close - close EBA unit.
- * @ubi: UBI device description object
- */
-void ubi_eba_close(const struct ubi_device *ubi)
-{
- int i, num_volumes = ubi->vtbl_slots + UBI_INT_VOL_COUNT;
-
- dbg_eba("close EBA unit");
-
- for (i = 0; i < num_volumes; i++) {
- if (!ubi->volumes[i])
- continue;
- kfree(ubi->volumes[i]->eba_tbl);
- }
-}
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/gluebi.c avr32-2.6/drivers/mtd/ubi/gluebi.c
--- linux-2.6.25.6/drivers/mtd/ubi/gluebi.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/gluebi.c 2008-06-12 15:03:59.587815297 +0200
@@ -291,11 +291,12 @@
/*
* In case of dynamic volume, MTD device size is just volume size. In
* case of a static volume the size is equivalent to the amount of data
- * bytes, which is zero at this moment and will be changed after volume
- * update.
+ * bytes.
*/
if (vol->vol_type == UBI_DYNAMIC_VOLUME)
mtd->size = vol->usable_leb_size * vol->reserved_pebs;
+ else
+ mtd->size = vol->used_bytes;
if (add_mtd_device(mtd)) {
ubi_err("cannot not add MTD device\n");
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/io.c avr32-2.6/drivers/mtd/ubi/io.c
--- linux-2.6.25.6/drivers/mtd/ubi/io.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/io.c 2008-06-12 15:03:59.587815297 +0200
@@ -631,6 +631,8 @@
dbg_io("read EC header from PEB %d", pnum);
ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+ if (UBI_IO_DEBUG)
+ verbose = 1;
err = ubi_io_read(ubi, ec_hdr, pnum, 0, UBI_EC_HDR_SIZE);
if (err) {
@@ -904,6 +906,8 @@
dbg_io("read VID header from PEB %d", pnum);
ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
+ if (UBI_IO_DEBUG)
+ verbose = 1;
p = (char *)vid_hdr - ubi->vid_hdr_shift;
err = ubi_io_read(ubi, p, pnum, ubi->vid_hdr_aloffset,
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/kapi.c avr32-2.6/drivers/mtd/ubi/kapi.c
--- linux-2.6.25.6/drivers/mtd/ubi/kapi.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/kapi.c 2008-06-12 15:09:41.123815692 +0200
@@ -397,8 +397,8 @@
return -EROFS;
if (lnum < 0 || lnum >= vol->reserved_pebs || offset < 0 || len < 0 ||
- offset + len > vol->usable_leb_size || offset % ubi->min_io_size ||
- len % ubi->min_io_size)
+ offset + len > vol->usable_leb_size ||
+ offset & (ubi->min_io_size - 1) || len & (ubi->min_io_size - 1))
return -EINVAL;
if (dtype != UBI_LONGTERM && dtype != UBI_SHORTTERM &&
@@ -447,7 +447,7 @@
return -EROFS;
if (lnum < 0 || lnum >= vol->reserved_pebs || len < 0 ||
- len > vol->usable_leb_size || len % ubi->min_io_size)
+ len > vol->usable_leb_size || len & (ubi->min_io_size - 1))
return -EINVAL;
if (dtype != UBI_LONGTERM && dtype != UBI_SHORTTERM &&
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/Kconfig avr32-2.6/drivers/mtd/ubi/Kconfig
--- linux-2.6.25.6/drivers/mtd/ubi/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/Kconfig 2008-06-12 15:03:59.583815905 +0200
@@ -24,8 +24,13 @@
erase counter value and the lowest erase counter value of eraseblocks
of UBI devices. When this threshold is exceeded, UBI starts performing
wear leveling by means of moving data from eraseblock with low erase
- counter to eraseblocks with high erase counter. Leave the default
- value if unsure.
+ counter to eraseblocks with high erase counter.
+
+ The default value should be OK for SLC NAND flashes, NOR flashes and
+ other flashes which have eraseblock life-cycle 100000 or more.
+ However, in case of MLC NAND flashes which typically have eraseblock
+ life-cycle less then 10000, the threshold should be lessened (e.g.,
+ to 128 or 256, although it does not have to be power of 2).
config MTD_UBI_BEB_RESERVE
int "Percentage of reserved eraseblocks for bad eraseblocks handling"
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/misc.c avr32-2.6/drivers/mtd/ubi/misc.c
--- linux-2.6.25.6/drivers/mtd/ubi/misc.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/misc.c 2008-06-12 15:09:41.123815692 +0200
@@ -37,7 +37,7 @@
{
int i;
- ubi_assert(length % ubi->min_io_size == 0);
+ ubi_assert(!(length & (ubi->min_io_size - 1)));
for (i = length - 1; i >= 0; i--)
if (((const uint8_t *)buf)[i] != 0xFF)
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/scan.c avr32-2.6/drivers/mtd/ubi/scan.c
--- linux-2.6.25.6/drivers/mtd/ubi/scan.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/scan.c 2008-06-12 15:03:59.587815297 +0200
@@ -42,6 +42,7 @@
#include <linux/err.h>
#include <linux/crc32.h>
+#include <asm/div64.h>
#include "ubi.h"
#ifdef CONFIG_MTD_UBI_DEBUG_PARANOID
@@ -92,27 +93,6 @@
}
/**
- * commit_to_mean_value - commit intermediate results to the final mean erase
- * counter value.
- * @si: scanning information
- *
- * This is a helper function which calculates partial mean erase counter mean
- * value and adds it to the resulting mean value. As we can work only in
- * integer arithmetic and we want to calculate the mean value of erase counter
- * accurately, we first sum erase counter values in @si->ec_sum variable and
- * count these components in @si->ec_count. If this temporary @si->ec_sum is
- * going to overflow, we calculate the partial mean value
- * (@si->ec_sum/@si->ec_count) and add it to @si->mean_ec.
- */
-static void commit_to_mean_value(struct ubi_scan_info *si)
-{
- si->ec_sum /= si->ec_count;
- if (si->ec_sum % si->ec_count >= si->ec_count / 2)
- si->mean_ec += 1;
- si->mean_ec += si->ec_sum;
-}
-
-/**
* validate_vid_hdr - check that volume identifier header is correct and
* consistent.
* @vid_hdr: the volume identifier header to check
@@ -901,15 +881,8 @@
adjust_mean_ec:
if (!ec_corr) {
- if (si->ec_sum + ec < ec) {
- commit_to_mean_value(si);
- si->ec_sum = 0;
- si->ec_count = 0;
- } else {
- si->ec_sum += ec;
- si->ec_count += 1;
- }
-
+ si->ec_sum += ec;
+ si->ec_count += 1;
if (ec > si->max_ec)
si->max_ec = ec;
if (ec < si->min_ec)
@@ -965,9 +938,11 @@
dbg_msg("scanning is finished");
- /* Finish mean erase counter calculations */
- if (si->ec_count)
- commit_to_mean_value(si);
+ /* Calculate mean erase counter */
+ if (si->ec_count) {
+ do_div(si->ec_sum, si->ec_count);
+ si->mean_ec = si->ec_sum;
+ }
if (si->is_empty)
ubi_msg("empty MTD device detected");
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/scan.h avr32-2.6/drivers/mtd/ubi/scan.h
--- linux-2.6.25.6/drivers/mtd/ubi/scan.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/scan.h 2008-06-12 15:03:59.587815297 +0200
@@ -124,7 +124,7 @@
int max_ec;
unsigned long long max_sqnum;
int mean_ec;
- int ec_sum;
+ uint64_t ec_sum;
int ec_count;
};
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/ubi.h avr32-2.6/drivers/mtd/ubi/ubi.h
--- linux-2.6.25.6/drivers/mtd/ubi/ubi.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/ubi.h 2008-06-12 15:09:41.123815692 +0200
@@ -37,10 +37,9 @@
#include <linux/string.h>
#include <linux/vmalloc.h>
#include <linux/mtd/mtd.h>
-
-#include <mtd/ubi-header.h>
#include <linux/mtd/ubi.h>
+#include "ubi-media.h"
#include "scan.h"
#include "debug.h"
@@ -478,7 +477,6 @@
int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
struct ubi_vid_hdr *vid_hdr);
int ubi_eba_init_scan(struct ubi_device *ubi, struct ubi_scan_info *si);
-void ubi_eba_close(const struct ubi_device *ubi);
/* wl.c */
int ubi_wl_get_peb(struct ubi_device *ubi, int dtype);
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/ubi-media.h avr32-2.6/drivers/mtd/ubi/ubi-media.h
--- linux-2.6.25.6/drivers/mtd/ubi/ubi-media.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/mtd/ubi/ubi-media.h 2008-06-12 15:03:59.587815297 +0200
@@ -0,0 +1,372 @@
+/*
+ * Copyright (c) International Business Machines Corp., 2006
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Thomas Gleixner
+ * Frank Haverkamp
+ * Oliver Lohmann
+ * Andreas Arnez
+ */
+
+/*
+ * This file defines the layout of UBI headers and all the other UBI on-flash
+ * data structures.
+ */
+
+#ifndef __UBI_MEDIA_H__
+#define __UBI_MEDIA_H__
+
+#include <asm/byteorder.h>
+
+/* The version of UBI images supported by this implementation */
+#define UBI_VERSION 1
+
+/* The highest erase counter value supported by this implementation */
+#define UBI_MAX_ERASECOUNTER 0x7FFFFFFF
+
+/* The initial CRC32 value used when calculating CRC checksums */
+#define UBI_CRC32_INIT 0xFFFFFFFFU
+
+/* Erase counter header magic number (ASCII "UBI#") */
+#define UBI_EC_HDR_MAGIC 0x55424923
+/* Volume identifier header magic number (ASCII "UBI!") */
+#define UBI_VID_HDR_MAGIC 0x55424921
+
+/*
+ * Volume type constants used in the volume identifier header.
+ *
+ * @UBI_VID_DYNAMIC: dynamic volume
+ * @UBI_VID_STATIC: static volume
+ */
+enum {
+ UBI_VID_DYNAMIC = 1,
+ UBI_VID_STATIC = 2
+};
+
+/*
+ * Volume flags used in the volume table record.
+ *
+ * @UBI_VTBL_AUTORESIZE_FLG: auto-resize this volume
+ *
+ * %UBI_VTBL_AUTORESIZE_FLG flag can be set only for one volume in the volume
+ * table. UBI automatically re-sizes the volume which has this flag and makes
+ * the volume to be of largest possible size. This means that if after the
+ * initialization UBI finds out that there are available physical eraseblocks
+ * present on the device, it automatically appends all of them to the volume
+ * (the physical eraseblocks reserved for bad eraseblocks handling and other
+ * reserved physical eraseblocks are not taken). So, if there is a volume with
+ * the %UBI_VTBL_AUTORESIZE_FLG flag set, the amount of available logical
+ * eraseblocks will be zero after UBI is loaded, because all of them will be
+ * reserved for this volume. Note, the %UBI_VTBL_AUTORESIZE_FLG bit is cleared
+ * after the volume had been initialized.
+ *
+ * The auto-resize feature is useful for device production purposes. For
+ * example, different NAND flash chips may have different amount of initial bad
+ * eraseblocks, depending of particular chip instance. Manufacturers of NAND
+ * chips usually guarantee that the amount of initial bad eraseblocks does not
+ * exceed certain percent, e.g. 2%. When one creates an UBI image which will be
+ * flashed to the end devices in production, he does not know the exact amount
+ * of good physical eraseblocks the NAND chip on the device will have, but this
+ * number is required to calculate the volume sized and put them to the volume
+ * table of the UBI image. In this case, one of the volumes (e.g., the one
+ * which will store the root file system) is marked as "auto-resizable", and
+ * UBI will adjust its size on the first boot if needed.
+ *
+ * Note, first UBI reserves some amount of physical eraseblocks for bad
+ * eraseblock handling, and then re-sizes the volume, not vice-versa. This
+ * means that the pool of reserved physical eraseblocks will always be present.
+ */
+enum {
+ UBI_VTBL_AUTORESIZE_FLG = 0x01,
+};
+
+/*
+ * Compatibility constants used by internal volumes.
+ *
+ * @UBI_COMPAT_DELETE: delete this internal volume before anything is written
+ * to the flash
+ * @UBI_COMPAT_RO: attach this device in read-only mode
+ * @UBI_COMPAT_PRESERVE: preserve this internal volume - do not touch its
+ * physical eraseblocks, don't allow the wear-leveling unit to move them
+ * @UBI_COMPAT_REJECT: reject this UBI image
+ */
+enum {
+ UBI_COMPAT_DELETE = 1,
+ UBI_COMPAT_RO = 2,
+ UBI_COMPAT_PRESERVE = 4,
+ UBI_COMPAT_REJECT = 5
+};
+
+/* Sizes of UBI headers */
+#define UBI_EC_HDR_SIZE sizeof(struct ubi_ec_hdr)
+#define UBI_VID_HDR_SIZE sizeof(struct ubi_vid_hdr)
+
+/* Sizes of UBI headers without the ending CRC */
+#define UBI_EC_HDR_SIZE_CRC (UBI_EC_HDR_SIZE - sizeof(__be32))
+#define UBI_VID_HDR_SIZE_CRC (UBI_VID_HDR_SIZE - sizeof(__be32))
+
+/**
+ * struct ubi_ec_hdr - UBI erase counter header.
+ * @magic: erase counter header magic number (%UBI_EC_HDR_MAGIC)
+ * @version: version of UBI implementation which is supposed to accept this
+ * UBI image
+ * @padding1: reserved for future, zeroes
+ * @ec: the erase counter
+ * @vid_hdr_offset: where the VID header starts
+ * @data_offset: where the user data start
+ * @padding2: reserved for future, zeroes
+ * @hdr_crc: erase counter header CRC checksum
+ *
+ * The erase counter header takes 64 bytes and has a plenty of unused space for
+ * future usage. The unused fields are zeroed. The @version field is used to
+ * indicate the version of UBI implementation which is supposed to be able to
+ * work with this UBI image. If @version is greater then the current UBI
+ * version, the image is rejected. This may be useful in future if something
+ * is changed radically. This field is duplicated in the volume identifier
+ * header.
+ *
+ * The @vid_hdr_offset and @data_offset fields contain the offset of the the
+ * volume identifier header and user data, relative to the beginning of the
+ * physical eraseblock. These values have to be the same for all physical
+ * eraseblocks.
+ */
+struct ubi_ec_hdr {
+ __be32 magic;
+ __u8 version;
+ __u8 padding1[3];
+ __be64 ec; /* Warning: the current limit is 31-bit anyway! */
+ __be32 vid_hdr_offset;
+ __be32 data_offset;
+ __u8 padding2[36];
+ __be32 hdr_crc;
+} __attribute__ ((packed));
+
+/**
+ * struct ubi_vid_hdr - on-flash UBI volume identifier header.
+ * @magic: volume identifier header magic number (%UBI_VID_HDR_MAGIC)
+ * @version: UBI implementation version which is supposed to accept this UBI
+ * image (%UBI_VERSION)
+ * @vol_type: volume type (%UBI_VID_DYNAMIC or %UBI_VID_STATIC)
+ * @copy_flag: if this logical eraseblock was copied from another physical
+ * eraseblock (for wear-leveling reasons)
+ * @compat: compatibility of this volume (%0, %UBI_COMPAT_DELETE,
+ * %UBI_COMPAT_IGNORE, %UBI_COMPAT_PRESERVE, or %UBI_COMPAT_REJECT)
+ * @vol_id: ID of this volume
+ * @lnum: logical eraseblock number
+ * @leb_ver: version of this logical eraseblock (IMPORTANT: obsolete, to be
+ * removed, kept only for not breaking older UBI users)
+ * @data_size: how many bytes of data this logical eraseblock contains
+ * @used_ebs: total number of used logical eraseblocks in this volume
+ * @data_pad: how many bytes at the end of this physical eraseblock are not
+ * used
+ * @data_crc: CRC checksum of the data stored in this logical eraseblock
+ * @padding1: reserved for future, zeroes
+ * @sqnum: sequence number
+ * @padding2: reserved for future, zeroes
+ * @hdr_crc: volume identifier header CRC checksum
+ *
+ * The @sqnum is the value of the global sequence counter at the time when this
+ * VID header was created. The global sequence counter is incremented each time
+ * UBI writes a new VID header to the flash, i.e. when it maps a logical
+ * eraseblock to a new physical eraseblock. The global sequence counter is an
+ * unsigned 64-bit integer and we assume it never overflows. The @sqnum
+ * (sequence number) is used to distinguish between older and newer versions of
+ * logical eraseblocks.
+ *
+ * There are 2 situations when there may be more then one physical eraseblock
+ * corresponding to the same logical eraseblock, i.e., having the same @vol_id
+ * and @lnum values in the volume identifier header. Suppose we have a logical
+ * eraseblock L and it is mapped to the physical eraseblock P.
+ *
+ * 1. Because UBI may erase physical eraseblocks asynchronously, the following
+ * situation is possible: L is asynchronously erased, so P is scheduled for
+ * erasure, then L is written to,i.e. mapped to another physical eraseblock P1,
+ * so P1 is written to, then an unclean reboot happens. Result - there are 2
+ * physical eraseblocks P and P1 corresponding to the same logical eraseblock
+ * L. But P1 has greater sequence number, so UBI picks P1 when it attaches the
+ * flash.
+ *
+ * 2. From time to time UBI moves logical eraseblocks to other physical
+ * eraseblocks for wear-leveling reasons. If, for example, UBI moves L from P
+ * to P1, and an unclean reboot happens before P is physically erased, there
+ * are two physical eraseblocks P and P1 corresponding to L and UBI has to
+ * select one of them when the flash is attached. The @sqnum field says which
+ * PEB is the original (obviously P will have lower @sqnum) and the copy. But
+ * it is not enough to select the physical eraseblock with the higher sequence
+ * number, because the unclean reboot could have happen in the middle of the
+ * copying process, so the data in P is corrupted. It is also not enough to
+ * just select the physical eraseblock with lower sequence number, because the
+ * data there may be old (consider a case if more data was added to P1 after
+ * the copying). Moreover, the unclean reboot may happen when the erasure of P
+ * was just started, so it result in unstable P, which is "mostly" OK, but
+ * still has unstable bits.
+ *
+ * UBI uses the @copy_flag field to indicate that this logical eraseblock is a
+ * copy. UBI also calculates data CRC when the data is moved and stores it at
+ * the @data_crc field of the copy (P1). So when UBI needs to pick one physical
+ * eraseblock of two (P or P1), the @copy_flag of the newer one (P1) is
+ * examined. If it is cleared, the situation* is simple and the newer one is
+ * picked. If it is set, the data CRC of the copy (P1) is examined. If the CRC
+ * checksum is correct, this physical eraseblock is selected (P1). Otherwise
+ * the older one (P) is selected.
+ *
+ * Note, there is an obsolete @leb_ver field which was used instead of @sqnum
+ * in the past. But it is not used anymore and we keep it in order to be able
+ * to deal with old UBI images. It will be removed at some point.
+ *
+ * There are 2 sorts of volumes in UBI: user volumes and internal volumes.
+ * Internal volumes are not seen from outside and are used for various internal
+ * UBI purposes. In this implementation there is only one internal volume - the
+ * layout volume. Internal volumes are the main mechanism of UBI extensions.
+ * For example, in future one may introduce a journal internal volume. Internal
+ * volumes have their own reserved range of IDs.
+ *
+ * The @compat field is only used for internal volumes and contains the "degree
+ * of their compatibility". It is always zero for user volumes. This field
+ * provides a mechanism to introduce UBI extensions and to be still compatible
+ * with older UBI binaries. For example, if someone introduced a journal in
+ * future, he would probably use %UBI_COMPAT_DELETE compatibility for the
+ * journal volume. And in this case, older UBI binaries, which know nothing
+ * about the journal volume, would just delete this volume and work perfectly
+ * fine. This is similar to what Ext2fs does when it is fed by an Ext3fs image
+ * - it just ignores the Ext3fs journal.
+ *
+ * The @data_crc field contains the CRC checksum of the contents of the logical
+ * eraseblock if this is a static volume. In case of dynamic volumes, it does
+ * not contain the CRC checksum as a rule. The only exception is when the
+ * data of the physical eraseblock was moved by the wear-leveling unit, then
+ * the wear-leveling unit calculates the data CRC and stores it in the
+ * @data_crc field. And of course, the @copy_flag is %in this case.
+ *
+ * The @data_size field is used only for static volumes because UBI has to know
+ * how many bytes of data are stored in this eraseblock. For dynamic volumes,
+ * this field usually contains zero. The only exception is when the data of the
+ * physical eraseblock was moved to another physical eraseblock for
+ * wear-leveling reasons. In this case, UBI calculates CRC checksum of the
+ * contents and uses both @data_crc and @data_size fields. In this case, the
+ * @data_size field contains data size.
+ *
+ * The @used_ebs field is used only for static volumes and indicates how many
+ * eraseblocks the data of the volume takes. For dynamic volumes this field is
+ * not used and always contains zero.
+ *
+ * The @data_pad is calculated when volumes are created using the alignment
+ * parameter. So, effectively, the @data_pad field reduces the size of logical
+ * eraseblocks of this volume. This is very handy when one uses block-oriented
+ * software (say, cramfs) on top of the UBI volume.
+ */
+struct ubi_vid_hdr {
+ __be32 magic;
+ __u8 version;
+ __u8 vol_type;
+ __u8 copy_flag;
+ __u8 compat;
+ __be32 vol_id;
+ __be32 lnum;
+ __be32 leb_ver; /* obsolete, to be removed, don't use */
+ __be32 data_size;
+ __be32 used_ebs;
+ __be32 data_pad;
+ __be32 data_crc;
+ __u8 padding1[4];
+ __be64 sqnum;
+ __u8 padding2[12];
+ __be32 hdr_crc;
+} __attribute__ ((packed));
+
+/* Internal UBI volumes count */
+#define UBI_INT_VOL_COUNT 1
+
+/*
+ * Starting ID of internal volumes. There is reserved room for 4096 internal
+ * volumes.
+ */
+#define UBI_INTERNAL_VOL_START (0x7FFFFFFF - 4096)
+
+/* The layout volume contains the volume table */
+
+#define UBI_LAYOUT_VOLUME_ID UBI_INTERNAL_VOL_START
+#define UBI_LAYOUT_VOLUME_TYPE UBI_VID_DYNAMIC
+#define UBI_LAYOUT_VOLUME_ALIGN 1
+#define UBI_LAYOUT_VOLUME_EBS 2
+#define UBI_LAYOUT_VOLUME_NAME "layout volume"
+#define UBI_LAYOUT_VOLUME_COMPAT UBI_COMPAT_REJECT
+
+/* The maximum number of volumes per one UBI device */
+#define UBI_MAX_VOLUMES 128
+
+/* The maximum volume name length */
+#define UBI_VOL_NAME_MAX 127
+
+/* Size of the volume table record */
+#define UBI_VTBL_RECORD_SIZE sizeof(struct ubi_vtbl_record)
+
+/* Size of the volume table record without the ending CRC */
+#define UBI_VTBL_RECORD_SIZE_CRC (UBI_VTBL_RECORD_SIZE - sizeof(__be32))
+
+/**
+ * struct ubi_vtbl_record - a record in the volume table.
+ * @reserved_pebs: how many physical eraseblocks are reserved for this volume
+ * @alignment: volume alignment
+ * @data_pad: how many bytes are unused at the end of the each physical
+ * eraseblock to satisfy the requested alignment
+ * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
+ * @upd_marker: if volume update was started but not finished
+ * @name_len: volume name length
+ * @name: the volume name
+ * @flags: volume flags (%UBI_VTBL_AUTORESIZE_FLG)
+ * @padding: reserved, zeroes
+ * @crc: a CRC32 checksum of the record
+ *
+ * The volume table records are stored in the volume table, which is stored in
+ * the layout volume. The layout volume consists of 2 logical eraseblock, each
+ * of which contains a copy of the volume table (i.e., the volume table is
+ * duplicated). The volume table is an array of &struct ubi_vtbl_record
+ * objects indexed by the volume ID.
+ *
+ * If the size of the logical eraseblock is large enough to fit
+ * %UBI_MAX_VOLUMES records, the volume table contains %UBI_MAX_VOLUMES
+ * records. Otherwise, it contains as many records as it can fit (i.e., size of
+ * logical eraseblock divided by sizeof(struct ubi_vtbl_record)).
+ *
+ * The @upd_marker flag is used to implement volume update. It is set to %1
+ * before update and set to %0 after the update. So if the update operation was
+ * interrupted, UBI knows that the volume is corrupted.
+ *
+ * The @alignment field is specified when the volume is created and cannot be
+ * later changed. It may be useful, for example, when a block-oriented file
+ * system works on top of UBI. The @data_pad field is calculated using the
+ * logical eraseblock size and @alignment. The alignment must be multiple to the
+ * minimal flash I/O unit. If @alignment is 1, all the available space of
+ * the physical eraseblocks is used.
+ *
+ * Empty records contain all zeroes and the CRC checksum of those zeroes.
+ */
+struct ubi_vtbl_record {
+ __be32 reserved_pebs;
+ __be32 alignment;
+ __be32 data_pad;
+ __u8 vol_type;
+ __u8 upd_marker;
+ __be16 name_len;
+ __u8 name[UBI_VOL_NAME_MAX+1];
+ __u8 flags;
+ __u8 padding[23];
+ __be32 crc;
+} __attribute__ ((packed));
+
+#endif /* !__UBI_MEDIA_H__ */
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/upd.c avr32-2.6/drivers/mtd/ubi/upd.c
--- linux-2.6.25.6/drivers/mtd/ubi/upd.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/upd.c 2008-06-12 15:09:41.123815692 +0200
@@ -237,10 +237,10 @@
int err;
if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
- len = ALIGN(len, ubi->min_io_size);
- memset(buf + len, 0xFF, len - len);
+ int l = ALIGN(len, ubi->min_io_size);
- len = ubi_calc_data_len(ubi, buf, len);
+ memset(buf + len, 0xFF, l - len);
+ len = ubi_calc_data_len(ubi, buf, l);
if (len == 0) {
dbg_msg("all %d bytes contain 0xFF - skip", len);
return 0;
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/vmt.c avr32-2.6/drivers/mtd/ubi/vmt.c
--- linux-2.6.25.6/drivers/mtd/ubi/vmt.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/vmt.c 2008-06-12 15:09:41.123815692 +0200
@@ -127,6 +127,7 @@
{
struct ubi_volume *vol = container_of(dev, struct ubi_volume, dev);
+ kfree(vol->eba_tbl);
kfree(vol);
}
@@ -201,7 +202,7 @@
*/
int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
{
- int i, err, vol_id = req->vol_id, dont_free = 0;
+ int i, err, vol_id = req->vol_id, do_free = 1;
struct ubi_volume *vol;
struct ubi_vtbl_record vtbl_rec;
uint64_t bytes;
@@ -365,14 +366,14 @@
out_sysfs:
/*
- * We have registered our device, we should not free the volume*
+ * We have registered our device, we should not free the volume
* description object in this function in case of an error - it is
* freed by the release function.
*
* Get device reference to prevent the release function from being
* called just after sysfs has been closed.
*/
- dont_free = 1;
+ do_free = 0;
get_device(&vol->dev);
volume_sysfs_close(vol);
out_gluebi:
@@ -382,17 +383,18 @@
out_cdev:
cdev_del(&vol->cdev);
out_mapping:
- kfree(vol->eba_tbl);
+ if (do_free)
+ kfree(vol->eba_tbl);
out_acc:
spin_lock(&ubi->volumes_lock);
ubi->rsvd_pebs -= vol->reserved_pebs;
ubi->avail_pebs += vol->reserved_pebs;
out_unlock:
spin_unlock(&ubi->volumes_lock);
- if (dont_free)
- put_device(&vol->dev);
- else
+ if (do_free)
kfree(vol);
+ else
+ put_device(&vol->dev);
ubi_err("cannot create volume %d, error %d", vol_id, err);
return err;
}
@@ -445,8 +447,6 @@
goto out_err;
}
- kfree(vol->eba_tbl);
- vol->eba_tbl = NULL;
cdev_del(&vol->cdev);
volume_sysfs_close(vol);
@@ -727,7 +727,7 @@
goto fail;
}
- n = vol->alignment % ubi->min_io_size;
+ n = vol->alignment & (ubi->min_io_size - 1);
if (vol->alignment != 1 && n) {
ubi_err("alignment is not multiple of min I/O unit");
goto fail;
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/vtbl.c avr32-2.6/drivers/mtd/ubi/vtbl.c
--- linux-2.6.25.6/drivers/mtd/ubi/vtbl.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/vtbl.c 2008-06-12 15:09:41.127815922 +0200
@@ -127,7 +127,7 @@
const struct ubi_vtbl_record *vtbl)
{
int i, n, reserved_pebs, alignment, data_pad, vol_type, name_len;
- int upd_marker;
+ int upd_marker, err;
uint32_t crc;
const char *name;
@@ -153,7 +153,7 @@
if (reserved_pebs == 0) {
if (memcmp(&vtbl[i], &empty_vtbl_record,
UBI_VTBL_RECORD_SIZE)) {
- dbg_err("bad empty record");
+ err = 2;
goto bad;
}
continue;
@@ -161,56 +161,57 @@
if (reserved_pebs < 0 || alignment < 0 || data_pad < 0 ||
name_len < 0) {
- dbg_err("negative values");
+ err = 3;
goto bad;
}
if (alignment > ubi->leb_size || alignment == 0) {
- dbg_err("bad alignment");
+ err = 4;
goto bad;
}
- n = alignment % ubi->min_io_size;
+ n = alignment & (ubi->min_io_size - 1);
if (alignment != 1 && n) {
- dbg_err("alignment is not multiple of min I/O unit");
+ err = 5;
goto bad;
}
n = ubi->leb_size % alignment;
if (data_pad != n) {
dbg_err("bad data_pad, has to be %d", n);
+ err = 6;
goto bad;
}
if (vol_type != UBI_VID_DYNAMIC && vol_type != UBI_VID_STATIC) {
- dbg_err("bad vol_type");
+ err = 7;
goto bad;
}
if (upd_marker != 0 && upd_marker != 1) {
- dbg_err("bad upd_marker");
+ err = 8;
goto bad;
}
if (reserved_pebs > ubi->good_peb_count) {
dbg_err("too large reserved_pebs, good PEBs %d",
ubi->good_peb_count);
+ err = 9;
goto bad;
}
if (name_len > UBI_VOL_NAME_MAX) {
- dbg_err("too long volume name, max %d",
- UBI_VOL_NAME_MAX);
+ err = 10;
goto bad;
}
if (name[0] == '\0') {
- dbg_err("NULL volume name");
+ err = 11;
goto bad;
}
if (name_len != strnlen(name, name_len + 1)) {
- dbg_err("bad name_len");
+ err = 12;
goto bad;
}
}
@@ -235,7 +236,7 @@
return 0;
bad:
- ubi_err("volume table check failed, record %d", i);
+ ubi_err("volume table check failed: record %d, error %d", i, err);
ubi_dbg_dump_vtbl_record(&vtbl[i], i);
return -EINVAL;
}
@@ -384,7 +385,16 @@
err = ubi_io_read_data(ubi, leb[seb->lnum], seb->pnum, 0,
ubi->vtbl_size);
if (err == UBI_IO_BITFLIPS || err == -EBADMSG)
- /* Scrub the PEB later */
+ /*
+ * Scrub the PEB later. Note, -EBADMSG indicates an
+ * uncorrectable ECC error, but we have our own CRC and
+ * the data will be checked later. If the data is OK,
+ * the PEB will be scrubbed (because we set
+ * seb->scrub). If the data is not OK, the contents of
+ * the PEB will be recovered from the second copy, and
+ * seb->scrub will be cleared in
+ * 'ubi_scan_add_used()'.
+ */
seb->scrub = 1;
else if (err)
goto out_free;
@@ -620,30 +630,32 @@
static int check_sv(const struct ubi_volume *vol,
const struct ubi_scan_volume *sv)
{
+ int err;
+
if (sv->highest_lnum >= vol->reserved_pebs) {
- dbg_err("bad highest_lnum");
+ err = 1;
goto bad;
}
if (sv->leb_count > vol->reserved_pebs) {
- dbg_err("bad leb_count");
+ err = 2;
goto bad;
}
if (sv->vol_type != vol->vol_type) {
- dbg_err("bad vol_type");
+ err = 3;
goto bad;
}
if (sv->used_ebs > vol->reserved_pebs) {
- dbg_err("bad used_ebs");
+ err = 4;
goto bad;
}
if (sv->data_pad != vol->data_pad) {
- dbg_err("bad data_pad");
+ err = 5;
goto bad;
}
return 0;
bad:
- ubi_err("bad scanning information");
+ ubi_err("bad scanning information, error %d", err);
ubi_dbg_dump_sv(sv);
ubi_dbg_dump_vol_info(vol);
return -EINVAL;
@@ -672,14 +684,13 @@
return -EINVAL;
}
- if (si->highest_vol_id >= ubi->vtbl_slots + UBI_INT_VOL_COUNT&&
+ if (si->highest_vol_id >= ubi->vtbl_slots + UBI_INT_VOL_COUNT &&
si->highest_vol_id < UBI_INTERNAL_VOL_START) {
ubi_err("too large volume ID %d found by scanning",
si->highest_vol_id);
return -EINVAL;
}
-
for (i = 0; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) {
cond_resched();
diff --exclude=.git -urN linux-2.6.25.6/drivers/mtd/ubi/wl.c avr32-2.6/drivers/mtd/ubi/wl.c
--- linux-2.6.25.6/drivers/mtd/ubi/wl.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/mtd/ubi/wl.c 2008-06-12 15:09:41.127815922 +0200
@@ -1368,7 +1368,7 @@
int err;
if (kthread_should_stop())
- goto out;
+ break;
if (try_to_freeze())
continue;
@@ -1403,7 +1403,6 @@
cond_resched();
}
-out:
dbg_wl("background thread \"%s\" is killed", ubi->bgt_name);
return 0;
}
diff --exclude=.git -urN linux-2.6.25.6/drivers/net/macb.c avr32-2.6/drivers/net/macb.c
--- linux-2.6.25.6/drivers/net/macb.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/net/macb.c 2008-06-12 15:09:41.343816061 +0200
@@ -1277,8 +1277,45 @@
return 0;
}
+#ifdef CONFIG_PM
+static int macb_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct net_device *netdev = platform_get_drvdata(pdev);
+ struct macb *bp = netdev_priv(netdev);
+
+ netif_device_detach(netdev);
+
+#ifndef CONFIG_ARCH_AT91
+ clk_disable(bp->hclk);
+#endif
+ clk_disable(bp->pclk);
+
+ return 0;
+}
+
+static int macb_resume(struct platform_device *pdev)
+{
+ struct net_device *netdev = platform_get_drvdata(pdev);
+ struct macb *bp = netdev_priv(netdev);
+
+ clk_enable(bp->pclk);
+#ifndef CONFIG_ARCH_AT91
+ clk_enable(bp->hclk);
+#endif
+
+ netif_device_attach(netdev);
+
+ return 0;
+}
+#else
+#define macb_suspend NULL
+#define macb_resume NULL
+#endif
+
static struct platform_driver macb_driver = {
.remove = __exit_p(macb_remove),
+ .suspend = macb_suspend,
+ .resume = macb_resume,
.driver = {
.name = "macb",
},
diff --exclude=.git -urN linux-2.6.25.6/drivers/parport/Kconfig avr32-2.6/drivers/parport/Kconfig
--- linux-2.6.25.6/drivers/parport/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/parport/Kconfig 2008-06-12 15:04:01.310815768 +0200
@@ -36,7 +36,7 @@
config PARPORT_PC
tristate "PC-style hardware"
depends on (!SPARC64 || PCI) && !SPARC32 && !M32R && !FRV && \
- (!M68K || ISA) && !MN10300
+ (!M68K || ISA) && !MN10300 && !AVR32
---help---
You should say Y here if you have a PC-style parallel port. All
IBM PC compatible computers and some Alphas have PC-style
diff --exclude=.git -urN linux-2.6.25.6/drivers/pcmcia/at32_cf.c avr32-2.6/drivers/pcmcia/at32_cf.c
--- linux-2.6.25.6/drivers/pcmcia/at32_cf.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/drivers/pcmcia/at32_cf.c 2008-06-12 15:09:42.047816626 +0200
@@ -0,0 +1,533 @@
+/*
+ * Driver for AVR32 Static Memory Controller: CompactFlash support
+ *
+ * Copyright (C) 2006 Atmel Norway
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * The full GNU General Public License is included in this
+ * distribution in the file called COPYING.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+
+#include <pcmcia/ss.h>
+
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/arch/board.h>
+
+#include <asm/arch/smc.h>
+
+struct at32_cf_socket {
+ struct pcmcia_socket socket;
+ int detect_pin;
+ int reset_pin;
+ int vcc_pin;
+ int ready_pin;
+ struct resource res_attr;
+ struct resource res_mem;
+ struct resource res_io;
+ struct smc_config smc;
+ unsigned int irq;
+ unsigned int cf_cs;
+ socket_state_t state;
+ unsigned present:1;
+};
+#define to_at32_cf(sock) container_of(sock, struct at32_cf_socket, socket)
+
+/*
+ * We have the following memory layout relative to the base address:
+ *
+ * Alt IDE Mode: 00e0 0000 -> 00ff ffff
+ * True IDE Mode: 00c0 0000 -> 00df ffff
+ * I/O memory: 0080 0000 -> 00bf ffff
+ * Common memory: 0040 0000 -> 007f ffff
+ * Attribute memory: 0000 0000 -> 003f ffff
+ */
+#define CF_ATTR_OFFSET 0x00000000
+#define CF_MEM_OFFSET 0x00400000
+#define CF_IO_OFFSET 0x00800000
+#define CF_RES_SIZE 4096
+
+#ifdef DEBUG
+
+static int pc_debug;
+module_param(pc_debug, int, 0644);
+
+static void at32_cf_debug(struct at32_cf_socket *cf, const char *func,
+ int level, const char *fmt, ...)
+{
+ va_list args;
+
+ if (pc_debug > level) {
+ printk(KERN_DEBUG "at32_cf/%u: %s: ", cf->cf_cs, func);
+ va_start(args, fmt);
+ vprintk(fmt, args);
+ va_end(args);
+ }
+}
+
+#define debug(cf, lvl, fmt, arg...) \
+ at32_cf_debug(cf, __func__, lvl, fmt, ##arg)
+
+#else
+#define debug(cf, lvl, fmt, arg...) do { } while (0)
+#endif
+
+static inline int at32_cf_present(struct at32_cf_socket *cf)
+{
+ int present = 1;
+
+ /* If we don't have a detect pin, assume the card is present */
+ if (cf->detect_pin >= 0)
+ present = !gpio_get_value(cf->detect_pin);
+
+ return present;
+}
+
+static irqreturn_t at32_cf_irq(int irq, void *dev_id)
+{
+ struct at32_cf_socket *cf = dev_id;
+ unsigned int present;
+
+ present = at32_cf_present(cf);
+ if (present != cf->present) {
+ cf->present = present;
+ debug(cf, 3, "card %s\n", present ? "present" : "gone");
+ pcmcia_parse_events(&cf->socket, SS_DETECT);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int at32_cf_get_status(struct pcmcia_socket *sock, u_int *value)
+{
+ struct at32_cf_socket *cf;
+ u_int status = 0;
+
+ cf = container_of(sock, struct at32_cf_socket, socket);
+
+ if (at32_cf_present(cf)) {
+ /* NOTE: gpio on AP7xxx is 3.3V */
+ status = SS_DETECT | SS_3VCARD;
+ if (cf->ready_pin < 0 || gpio_get_value(cf->ready_pin))
+ status |= SS_READY;
+ if (cf->vcc_pin < 0 || gpio_get_value(cf->vcc_pin))
+ status |= SS_POWERON;
+ }
+
+ *value = status;
+ return 0;
+}
+
+static int at32_cf_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
+{
+ struct at32_cf_socket *cf = container_of(sock, struct at32_cf_socket, socket);
+
+ debug(cf, 2, "mask: %s%s%s%s%s%sflags: %s%s%s%s%s%sVcc %d Vpp %d irq %d\n",
+ (state->csc_mask==0)?"<NONE> ":"",
+ (state->csc_mask&SS_DETECT)?"DETECT ":"",
+ (state->csc_mask&SS_READY)?"READY ":"",
+ (state->csc_mask&SS_BATDEAD)?"BATDEAD ":"",
+ (state->csc_mask&SS_BATWARN)?"BATWARN ":"",
+ (state->csc_mask&SS_STSCHG)?"STSCHG ":"",
+ (state->flags==0)?"<NONE> ":"",
+ (state->flags&SS_PWR_AUTO)?"PWR_AUTO ":"",
+ (state->flags&SS_IOCARD)?"IOCARD ":"",
+ (state->flags&SS_RESET)?"RESET ":"",
+ (state->flags&SS_SPKR_ENA)?"SPKR_ENA ":"",
+ (state->flags&SS_OUTPUT_ENA)?"OUTPUT_ENA ":"",
+ state->Vcc, state->Vpp, state->io_irq);
+
+ /*
+ * TODO: Allow boards to override this in case they have level
+ * converters.
+ */
+ switch (state->Vcc) {
+ case 0:
+ if (cf->vcc_pin >= 0)
+ gpio_set_value(cf->vcc_pin, 0);
+ break;
+ case 33:
+ if (cf->vcc_pin >= 0)
+ gpio_set_value(cf->vcc_pin, 1);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (cf->reset_pin >= 0)
+ gpio_set_value(cf->reset_pin, state->flags & SS_RESET);
+
+ cf->state = *state;
+
+ return 0;
+}
+
+static int at32_cf_socket_init(struct pcmcia_socket *sock)
+{
+ debug(to_at32_cf(sock), 2, "called\n");
+
+ return 0;
+}
+
+static int at32_cf_suspend(struct pcmcia_socket *sock)
+{
+ debug(to_at32_cf(sock), 2, "called\n");
+
+ at32_cf_set_socket(sock, &dead_socket);
+
+ return 0;
+}
+
+static int at32_cf_set_io_map(struct pcmcia_socket *sock,
+ struct pccard_io_map *map)
+{
+ struct at32_cf_socket *cf = container_of(sock, struct at32_cf_socket, socket);
+ int retval;
+
+ debug(cf, 2, "map %u speed %u start 0x%08x stop 0x%08x\n",
+ map->map, map->speed, map->start, map->stop);
+ debug(cf, 2, "flags: %s%s%s%s%s%s%s%s\n",
+ (map->flags == 0) ? "<NONE>":"",
+ (map->flags & MAP_ACTIVE) ? "ACTIVE " : "",
+ (map->flags & MAP_16BIT) ? "16BIT " : "",
+ (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "",
+ (map->flags & MAP_0WS) ? "0WS " : "",
+ (map->flags & MAP_WRPROT) ? "WRPROT " : "",
+ (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : "",
+ (map->flags & MAP_PREFETCH) ? "PREFETCH " : "");
+
+ map->flags &= MAP_ACTIVE | MAP_16BIT | MAP_USE_WAIT;
+
+ if (map->flags & MAP_16BIT)
+ cf->smc.bus_width = 2;
+ else
+ cf->smc.bus_width = 1;
+
+ if (map->flags & MAP_USE_WAIT)
+ cf->smc.nwait_mode = 3;
+ else
+ cf->smc.nwait_mode = 0;
+
+ retval = smc_set_configuration(cf->cf_cs, &cf->smc);
+ if (retval) {
+ printk(KERN_ERR "at32_cf: could not set up SMC for I/O\n");
+ return retval;
+ }
+
+ map->start = cf->socket.io_offset;
+ map->stop = map->start + CF_RES_SIZE - 1;
+
+ return 0;
+}
+
+static int
+at32_cf_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *map)
+{
+ struct at32_cf_socket *cf;
+ struct resource *res;
+ int retval;
+
+ cf = container_of(sock, struct at32_cf_socket, socket);
+
+ debug(cf, 2, "map %u speed %u card_start %08x\n",
+ map->map, map->speed, map->card_start);
+ debug(cf, 2, "flags: %s%s%s%s%s%s%s%s\n",
+ (map->flags==0)?"<NONE>":"",
+ (map->flags&MAP_ACTIVE)?"ACTIVE ":"",
+ (map->flags&MAP_16BIT)?"16BIT ":"",
+ (map->flags&MAP_AUTOSZ)?"AUTOSZ ":"",
+ (map->flags&MAP_0WS)?"0WS ":"",
+ (map->flags&MAP_WRPROT)?"WRPROT ":"",
+ (map->flags&MAP_ATTRIB)?"ATTRIB ":"",
+ (map->flags&MAP_USE_WAIT)?"USE_WAIT ":"");
+
+ if (map->card_start)
+ return -EINVAL;
+
+ map->flags &= MAP_ACTIVE | MAP_ATTRIB | MAP_16BIT | MAP_USE_WAIT;
+
+ if (map->flags & MAP_ATTRIB) {
+ res = &cf->res_attr;
+
+ /* Linksys WCF12 seems to use WAIT when reading CIS */
+ map->flags |= MAP_USE_WAIT;
+ } else {
+ res = &cf->res_mem;
+ }
+
+ if (map->flags & MAP_USE_WAIT)
+ cf->smc.nwait_mode = 3;
+ else
+ cf->smc.nwait_mode = 0;
+
+ retval = smc_set_configuration(cf->cf_cs, &cf->smc);
+ if (retval) {
+ printk(KERN_ERR "at32_cf: could not set up SMC for mem\n");
+ return retval;
+ }
+
+ map->static_start = res->start;
+
+ return 0;
+}
+
+static struct pccard_operations at32_cf_ops = {
+ .init = at32_cf_socket_init,
+ .suspend = at32_cf_suspend,
+ .get_status = at32_cf_get_status,
+ .set_socket = at32_cf_set_socket,
+ .set_io_map = at32_cf_set_io_map,
+ .set_mem_map = at32_cf_set_mem_map,
+};
+
+static int __init request_pin(struct platform_device *pdev,
+ unsigned int pin, const char *name)
+{
+ if (gpio_request(pin, name)) {
+ dev_warn(&pdev->dev, "failed to request %s pin\n", name);
+ return -1;
+ }
+
+ return pin;
+}
+
+static struct smc_timing at32_cf_timing __initdata = {
+ .ncs_read_setup = 30,
+ .nrd_setup = 100,
+ .ncs_write_setup = 30,
+ .nwe_setup = 100,
+
+ .ncs_read_pulse = 360,
+ .nrd_pulse = 290,
+ .ncs_write_pulse = 360,
+ .nwe_pulse = 290,
+
+ .read_cycle = 420,
+ .write_cycle = 420,
+};
+
+static int __init at32_cf_probe(struct platform_device *pdev)
+{
+ struct at32_cf_socket *cf;
+ struct cf_platform_data *board = pdev->dev.platform_data;
+ struct resource *res_skt;
+ int irq;
+ int ret;
+
+ dev_dbg(&pdev->dev, "probe");
+
+ if (!board)
+ return -ENXIO;
+
+ res_skt = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res_skt)
+ return -ENXIO;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ cf = kzalloc(sizeof(struct at32_cf_socket), GFP_KERNEL);
+ if (!cf)
+ return -ENOMEM;
+
+ cf->detect_pin = -1;
+ cf->reset_pin = -1;
+ cf->vcc_pin = -1;
+ cf->ready_pin = -1;
+ cf->cf_cs = board->cs;
+
+ if (board->detect_pin != GPIO_PIN_NONE)
+ cf->detect_pin = request_pin(pdev, board->detect_pin,
+ "cf_detect");
+ if (board->reset_pin != GPIO_PIN_NONE)
+ cf->reset_pin = request_pin(pdev, board->reset_pin,
+ "cf_reset");
+ if (board->vcc_pin != GPIO_PIN_NONE)
+ cf->vcc_pin = request_pin(pdev, board->vcc_pin,
+ "cf_vcc");
+ if (board->ready_pin != GPIO_PIN_NONE)
+ /* READY is also used for irq through EIM */
+ cf->ready_pin = board->ready_pin;
+
+ debug(cf, 2, "pins: detect=%d reset=%d vcc=%d\n",
+ cf->detect_pin, cf->reset_pin, cf->vcc_pin);
+
+ cf->socket.pci_irq = irq;
+ cf->socket.ops = &at32_cf_ops;
+ cf->socket.resource_ops = &pccard_static_ops;
+ cf->socket.dev.parent = &pdev->dev;
+ cf->socket.owner = THIS_MODULE;
+ cf->socket.features =
+ SS_CAP_MEM_ALIGN | SS_CAP_STATIC_MAP | SS_CAP_PCCARD;
+ cf->socket.map_size = CF_RES_SIZE;
+
+ cf->res_attr.start = res_skt->start + CF_ATTR_OFFSET;
+ cf->res_attr.end = cf->res_attr.start + CF_RES_SIZE - 1;
+ cf->res_attr.name = "attribute";
+ cf->res_attr.flags = IORESOURCE_MEM;
+ ret = request_resource(res_skt, &cf->res_attr);
+ if (ret)
+ goto err_request_res_attr;
+
+ cf->res_mem.start = res_skt->start + CF_MEM_OFFSET;
+ cf->res_mem.end = cf->res_mem.start + CF_RES_SIZE - 1;
+ cf->res_mem.name = "memory";
+ cf->res_mem.flags = IORESOURCE_MEM;
+ ret = request_resource(res_skt, &cf->res_mem);
+ if (ret)
+ goto err_request_res_mem;
+
+ cf->res_io.start = res_skt->start + CF_IO_OFFSET;
+ cf->res_io.end = cf->res_io.start + CF_RES_SIZE - 1;
+ cf->res_io.name = "io";
+ cf->res_io.flags = IORESOURCE_MEM;
+ ret = request_resource(res_skt, &cf->res_io);
+ if (ret)
+ goto err_request_res_io;
+
+ cf->socket.io_offset = cf->res_io.start;
+
+ if (cf->detect_pin >= 0) {
+ ret = request_irq(gpio_to_irq(cf->detect_pin), at32_cf_irq,
+ IRQF_SHARED, "cf_detect", cf);
+ if (ret) {
+ debug(cf, 1,
+ "failed to request cf_detect interrupt\n");
+ goto err_detect_irq;
+ }
+ }
+
+ cf->present = at32_cf_present(cf);
+
+ /* Setup SMC timings */
+ smc_set_timing(&cf->smc, &at32_cf_timing);
+
+ cf->smc.bus_width = 2;
+ cf->smc.nrd_controlled = 1;
+ cf->smc.nwe_controlled = 1;
+ cf->smc.nwait_mode = 0;
+ cf->smc.byte_write = 0;
+ cf->smc.tdf_cycles = 8;
+ cf->smc.tdf_mode = 0;
+
+ ret = smc_set_configuration(cf->cf_cs, &cf->smc);
+ if (ret) {
+ debug(cf, 1, "failed to configure SMC\n", ret);
+ goto err_smc;
+ }
+
+ ret = pcmcia_register_socket(&cf->socket);
+ if (ret) {
+ debug(cf, 1, "failed to register socket: %d\n", ret);
+ goto err_register_socket;
+ }
+
+ if (cf->reset_pin >= 0)
+ gpio_direction_output(cf->reset_pin, 0);
+
+ platform_set_drvdata(pdev, cf);
+
+ dev_info(&pdev->dev, "Atmel SMC CF interface at 0x%08lx\n",
+ (unsigned long)res_skt->start);
+
+ return 0;
+
+err_register_socket:
+err_smc:
+ if (cf->detect_pin >= 0)
+ free_irq(gpio_to_irq(cf->detect_pin), cf);
+err_detect_irq:
+ release_resource(&cf->res_io);
+err_request_res_io:
+ release_resource(&cf->res_mem);
+err_request_res_mem:
+ release_resource(&cf->res_attr);
+err_request_res_attr:
+ if (cf->vcc_pin >= 0)
+ gpio_free(cf->vcc_pin);
+ if (cf->reset_pin >= 0)
+ gpio_free(cf->reset_pin);
+ if (cf->detect_pin >= 0)
+ gpio_free(cf->detect_pin);
+ kfree(cf);
+
+ return ret;
+}
+
+static int __exit at32_cf_remove(struct platform_device *pdev)
+{
+ struct at32_cf_socket *cf = platform_get_drvdata(pdev);
+
+ pcmcia_unregister_socket(&cf->socket);
+ if (cf->detect_pin >= 0) {
+ free_irq(gpio_to_irq(cf->detect_pin), cf);
+ gpio_free(cf->detect_pin);
+ }
+ if (cf->vcc_pin >= 0)
+ gpio_free(cf->vcc_pin);
+ if (cf->reset_pin >= 0)
+ gpio_free(cf->reset_pin);
+
+ release_resource(&cf->res_io);
+ release_resource(&cf->res_mem);
+ release_resource(&cf->res_attr);
+ kfree(cf);
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver at32_cf_driver = {
+ .remove = __exit_p(at32_cf_remove),
+ .driver = {
+ .name = "at32_cf",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init at32_cf_init(void)
+{
+ int ret;
+
+ ret = platform_driver_probe(&at32_cf_driver, at32_cf_probe);
+ if (ret)
+ printk(KERN_ERR "at32_cf: probe failed: %d\n", ret);
+ return ret;
+}
+
+static void __exit at32_cf_exit(void)
+{
+ platform_driver_unregister(&at32_cf_driver);
+}
+
+module_init(at32_cf_init);
+module_exit(at32_cf_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Driver for SMC PCMCIA interface");
+MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
diff --exclude=.git -urN linux-2.6.25.6/drivers/pcmcia/Kconfig avr32-2.6/drivers/pcmcia/Kconfig
--- linux-2.6.25.6/drivers/pcmcia/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/pcmcia/Kconfig 2008-06-12 15:09:42.047816626 +0200
@@ -277,6 +277,13 @@
Say Y here to support the CompactFlash controller on the
PA Semi Electra eval board.
+config AT32_CF
+ tristate "AT32AP CompactFlash Controller"
+ depends on PCMCIA && AVR32 && PLATFORM_AT32AP
+ help
+ Say Y here to support the CompactFlash controller on AT32 chips.
+ Or choose M to compile the driver as a module named "at32_cf".
+
config PCCARD_NONSTATIC
tristate
diff --exclude=.git -urN linux-2.6.25.6/drivers/pcmcia/Makefile avr32-2.6/drivers/pcmcia/Makefile
--- linux-2.6.25.6/drivers/pcmcia/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/pcmcia/Makefile 2008-06-12 15:09:42.047816626 +0200
@@ -38,6 +38,7 @@
obj-$(CONFIG_OMAP_CF) += omap_cf.o
obj-$(CONFIG_AT91_CF) += at91_cf.o
obj-$(CONFIG_ELECTRA_CF) += electra_cf.o
+obj-$(CONFIG_AT32_CF) += at32_cf.o
sa11xx_core-y += soc_common.o sa11xx_base.o
pxa2xx_core-y += soc_common.o pxa2xx_base.o
diff --exclude=.git -urN linux-2.6.25.6/drivers/serial/atmel_serial.c avr32-2.6/drivers/serial/atmel_serial.c
--- linux-2.6.25.6/drivers/serial/atmel_serial.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/serial/atmel_serial.c 2008-06-12 15:09:42.514816054 +0200
@@ -1440,6 +1440,15 @@
};
#ifdef CONFIG_PM
+static bool atmel_serial_clk_will_stop(void)
+{
+#ifdef CONFIG_ARCH_AT91
+ return at91_suspend_entering_slow_clock();
+#else
+ return false;
+#endif
+}
+
static int atmel_serial_suspend(struct platform_device *pdev,
pm_message_t state)
{
@@ -1447,7 +1456,7 @@
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
if (device_may_wakeup(&pdev->dev)
- && !at91_suspend_entering_slow_clock())
+ && !atmel_serial_clk_will_stop())
enable_irq_wake(port->irq);
else {
uart_suspend_port(&atmel_uart, port);
diff --exclude=.git -urN linux-2.6.25.6/drivers/spi/atmel_spi.c avr32-2.6/drivers/spi/atmel_spi.c
--- linux-2.6.25.6/drivers/spi/atmel_spi.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/spi/atmel_spi.c 2008-06-12 15:09:42.542815989 +0200
@@ -51,9 +51,7 @@
u8 stopping;
struct list_head queue;
struct spi_transfer *current_transfer;
- unsigned long current_remaining_bytes;
- struct spi_transfer *next_transfer;
- unsigned long next_remaining_bytes;
+ unsigned long remaining_bytes;
void *buffer;
dma_addr_t buffer_dma;
@@ -133,48 +131,6 @@
gpio_set_value(gpio, !active);
}
-static inline int atmel_spi_xfer_is_last(struct spi_message *msg,
- struct spi_transfer *xfer)
-{
- return msg->transfers.prev == &xfer->transfer_list;
-}
-
-static inline int atmel_spi_xfer_can_be_chained(struct spi_transfer *xfer)
-{
- return xfer->delay_usecs == 0 && !xfer->cs_change;
-}
-
-static void atmel_spi_next_xfer_data(struct spi_master *master,
- struct spi_transfer *xfer,
- dma_addr_t *tx_dma,
- dma_addr_t *rx_dma,
- u32 *plen)
-{
- struct atmel_spi *as = spi_master_get_devdata(master);
- u32 len = *plen;
-
- /* use scratch buffer only when rx or tx data is unspecified */
- if (xfer->rx_buf)
- *rx_dma = xfer->rx_dma + xfer->len - len;
- else {
- *rx_dma = as->buffer_dma;
- if (len > BUFFER_SIZE)
- len = BUFFER_SIZE;
- }
- if (xfer->tx_buf)
- *tx_dma = xfer->tx_dma + xfer->len - len;
- else {
- *tx_dma = as->buffer_dma;
- if (len > BUFFER_SIZE)
- len = BUFFER_SIZE;
- memset(as->buffer, 0, len);
- dma_sync_single_for_device(&as->pdev->dev,
- as->buffer_dma, len, DMA_TO_DEVICE);
- }
-
- *plen = len;
-}
-
/*
* Submit next transfer for DMA.
* lock is held, spi irq is blocked
@@ -184,78 +140,53 @@
{
struct atmel_spi *as = spi_master_get_devdata(master);
struct spi_transfer *xfer;
- u32 len, remaining, total;
+ u32 len;
dma_addr_t tx_dma, rx_dma;
- if (!as->current_transfer)
- xfer = list_entry(msg->transfers.next,
- struct spi_transfer, transfer_list);
- else if (!as->next_transfer)
- xfer = list_entry(as->current_transfer->transfer_list.next,
- struct spi_transfer, transfer_list);
- else
- xfer = NULL;
-
- if (xfer) {
- len = xfer->len;
- atmel_spi_next_xfer_data(master, xfer, &tx_dma, &rx_dma, &len);
- remaining = xfer->len - len;
-
- spi_writel(as, RPR, rx_dma);
- spi_writel(as, TPR, tx_dma);
-
- if (msg->spi->bits_per_word > 8)
- len >>= 1;
- spi_writel(as, RCR, len);
- spi_writel(as, TCR, len);
-
- dev_dbg(&msg->spi->dev,
- " start xfer %p: len %u tx %p/%08x rx %p/%08x\n",
- xfer, xfer->len, xfer->tx_buf, xfer->tx_dma,
- xfer->rx_buf, xfer->rx_dma);
- } else {
- xfer = as->next_transfer;
- remaining = as->next_remaining_bytes;
+ xfer = as->current_transfer;
+ if (!xfer || as->remaining_bytes == 0) {
+ if (xfer)
+ xfer = list_entry(xfer->transfer_list.next,
+ struct spi_transfer, transfer_list);
+ else
+ xfer = list_entry(msg->transfers.next,
+ struct spi_transfer, transfer_list);
+ as->remaining_bytes = xfer->len;
+ as->current_transfer = xfer;
}
- as->current_transfer = xfer;
- as->current_remaining_bytes = remaining;
-
- if (remaining > 0)
- len = remaining;
- else if (!atmel_spi_xfer_is_last(msg, xfer)
- && atmel_spi_xfer_can_be_chained(xfer)) {
- xfer = list_entry(xfer->transfer_list.next,
- struct spi_transfer, transfer_list);
- len = xfer->len;
- } else
- xfer = NULL;
+ len = as->remaining_bytes;
- as->next_transfer = xfer;
+ tx_dma = xfer->tx_dma + xfer->len - len;
+ rx_dma = xfer->rx_dma + xfer->len - len;
- if (xfer) {
- total = len;
- atmel_spi_next_xfer_data(master, xfer, &tx_dma, &rx_dma, &len);
- as->next_remaining_bytes = total - len;
-
- spi_writel(as, RNPR, rx_dma);
- spi_writel(as, TNPR, tx_dma);
-
- if (msg->spi->bits_per_word > 8)
- len >>= 1;
- spi_writel(as, RNCR, len);
- spi_writel(as, TNCR, len);
-
- dev_dbg(&msg->spi->dev,
- " next xfer %p: len %u tx %p/%08x rx %p/%08x\n",
- xfer, xfer->len, xfer->tx_buf, xfer->tx_dma,
- xfer->rx_buf, xfer->rx_dma);
- } else {
- spi_writel(as, RNCR, 0);
- spi_writel(as, TNCR, 0);
+ /* use scratch buffer only when rx or tx data is unspecified */
+ if (!xfer->rx_buf) {
+ rx_dma = as->buffer_dma;
+ if (len > BUFFER_SIZE)
+ len = BUFFER_SIZE;
}
+ if (!xfer->tx_buf) {
+ tx_dma = as->buffer_dma;
+ if (len > BUFFER_SIZE)
+ len = BUFFER_SIZE;
+ memset(as->buffer, 0, len);
+ dma_sync_single_for_device(&as->pdev->dev,
+ as->buffer_dma, len, DMA_TO_DEVICE);
+ }
+
+ spi_writel(as, RPR, rx_dma);
+ spi_writel(as, TPR, tx_dma);
- /* REVISIT: We're waiting for ENDRX before we start the next
+ as->remaining_bytes -= len;
+ if (msg->spi->bits_per_word > 8)
+ len >>= 1;
+
+ /* REVISIT: when xfer->delay_usecs == 0, the PDC "next transfer"
+ * mechanism might help avoid the IRQ latency between transfers
+ * (and improve the nCS0 errata handling on at91rm9200 chips)
+ *
+ * We're also waiting for ENDRX before we start the next
* transfer because we need to handle some difficult timing
* issues otherwise. If we wait for ENDTX in one transfer and
* then starts waiting for ENDRX in the next, it's difficult
@@ -265,7 +196,17 @@
*
* It should be doable, though. Just not now...
*/
+ spi_writel(as, TNCR, 0);
+ spi_writel(as, RNCR, 0);
spi_writel(as, IER, SPI_BIT(ENDRX) | SPI_BIT(OVRES));
+
+ dev_dbg(&msg->spi->dev,
+ " start xfer %p: len %u tx %p/%08x rx %p/%08x imr %03x\n",
+ xfer, xfer->len, xfer->tx_buf, xfer->tx_dma,
+ xfer->rx_buf, xfer->rx_dma, spi_readl(as, IMR));
+
+ spi_writel(as, RCR, len);
+ spi_writel(as, TCR, len);
spi_writel(as, PTCR, SPI_BIT(TXTEN) | SPI_BIT(RXTEN));
}
@@ -363,7 +304,6 @@
spin_lock(&as->lock);
as->current_transfer = NULL;
- as->next_transfer = NULL;
/* continue if needed */
if (list_empty(&as->queue) || as->stopping)
@@ -447,7 +387,7 @@
spi_writel(as, IDR, pending);
- if (as->current_remaining_bytes == 0) {
+ if (as->remaining_bytes == 0) {
msg->actual_length += xfer->len;
if (!msg->is_dma_mapped)
@@ -457,7 +397,7 @@
if (xfer->delay_usecs)
udelay(xfer->delay_usecs);
- if (atmel_spi_xfer_is_last(msg, xfer)) {
+ if (msg->transfers.prev == &xfer->transfer_list) {
/* report completed message */
atmel_spi_msg_done(master, as, msg, 0,
xfer->cs_change);
diff --exclude=.git -urN linux-2.6.25.6/drivers/usb/gadget/atmel_usba_udc.c avr32-2.6/drivers/usb/gadget/atmel_usba_udc.c
--- linux-2.6.25.6/drivers/usb/gadget/atmel_usba_udc.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/usb/gadget/atmel_usba_udc.c 2008-06-12 15:09:42.586816287 +0200
@@ -18,6 +18,7 @@
#include <linux/platform_device.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
+#include <linux/usb/atmel_usba_udc.h>
#include <linux/delay.h>
#include <asm/gpio.h>
@@ -27,6 +28,7 @@
static struct usba_udc the_udc;
+static struct usba_ep *usba_ep;
#ifdef CONFIG_USB_GADGET_DEBUG_FS
#include <linux/debugfs.h>
@@ -324,53 +326,28 @@
return 1;
}
-static void copy_to_fifo(void __iomem *fifo, const void *buf, int len)
-{
- unsigned long tmp;
+#if defined(CONFIG_AVR32)
- DBG(DBG_FIFO, "copy to FIFO (len %d):\n", len);
- for (; len > 0; len -= 4, buf += 4, fifo += 4) {
- tmp = *(unsigned long *)buf;
- if (len >= 4) {
- DBG(DBG_FIFO, " -> %08lx\n", tmp);
- __raw_writel(tmp, fifo);
- } else {
- do {
- DBG(DBG_FIFO, " -> %02lx\n", tmp >> 24);
- __raw_writeb(tmp >> 24, fifo);
- fifo++;
- tmp <<= 8;
- } while (--len);
- break;
- }
- }
+static void toggle_bias(int is_on)
+{
}
-static void copy_from_fifo(void *buf, void __iomem *fifo, int len)
+#elif defined(CONFIG_ARCH_AT91)
+
+#include <asm/arch/at91_pmc.h>
+
+static void toggle_bias(int is_on)
{
- union {
- unsigned long *w;
- unsigned char *b;
- } p;
- unsigned long tmp;
-
- DBG(DBG_FIFO, "copy from FIFO (len %d):\n", len);
- for (p.w = buf; len > 0; len -= 4, p.w++, fifo += 4) {
- if (len >= 4) {
- tmp = __raw_readl(fifo);
- *p.w = tmp;
- DBG(DBG_FIFO, " -> %08lx\n", tmp);
- } else {
- do {
- tmp = __raw_readb(fifo);
- *p.b = tmp;
- DBG(DBG_FIFO, " -> %02lx\n", tmp);
- fifo++, p.b++;
- } while (--len);
- }
- }
+ unsigned int uckr = at91_sys_read(AT91_CKGR_UCKR);
+
+ if (is_on)
+ at91_sys_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
+ else
+ at91_sys_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
}
+#endif /* CONFIG_ARCH_AT91 */
+
static void next_fifo_transaction(struct usba_ep *ep, struct usba_request *req)
{
unsigned int transaction_len;
@@ -387,7 +364,7 @@
ep->ep.name, req, transaction_len,
req->last_transaction ? ", done" : "");
- copy_to_fifo(ep->fifo, req->req.buf + req->req.actual, transaction_len);
+ memcpy_toio(ep->fifo, req->req.buf + req->req.actual, transaction_len);
usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
req->req.actual += transaction_len;
}
@@ -476,7 +453,7 @@
bytecount = req->req.length - req->req.actual;
}
- copy_from_fifo(req->req.buf + req->req.actual,
+ memcpy_fromio(req->req.buf + req->req.actual,
ep->fifo, bytecount);
req->req.actual += bytecount;
@@ -1029,33 +1006,6 @@
.set_selfpowered = usba_udc_set_selfpowered,
};
-#define EP(nam, idx, maxpkt, maxbk, dma, isoc) \
-{ \
- .ep = { \
- .ops = &usba_ep_ops, \
- .name = nam, \
- .maxpacket = maxpkt, \
- }, \
- .udc = &the_udc, \
- .queue = LIST_HEAD_INIT(usba_ep[idx].queue), \
- .fifo_size = maxpkt, \
- .nr_banks = maxbk, \
- .index = idx, \
- .can_dma = dma, \
- .can_isoc = isoc, \
-}
-
-static struct usba_ep usba_ep[] = {
- EP("ep0", 0, 64, 1, 0, 0),
- EP("ep1in-bulk", 1, 512, 2, 1, 1),
- EP("ep2out-bulk", 2, 512, 2, 1, 1),
- EP("ep3in-int", 3, 64, 3, 1, 0),
- EP("ep4out-int", 4, 64, 3, 1, 0),
- EP("ep5in-iso", 5, 1024, 3, 1, 1),
- EP("ep6out-iso", 6, 1024, 3, 1, 1),
-};
-#undef EP
-
static struct usb_endpoint_descriptor usba_ep0_desc = {
.bLength = USB_DT_ENDPOINT_SIZE,
.bDescriptorType = USB_DT_ENDPOINT,
@@ -1074,7 +1024,6 @@
static struct usba_udc the_udc = {
.gadget = {
.ops = &usba_udc_ops,
- .ep0 = &usba_ep[0].ep,
.ep_list = LIST_HEAD_INIT(the_udc.gadget.ep_list),
.is_dualspeed = 1,
.name = "atmel_usba_udc",
@@ -1231,7 +1180,7 @@
} else {
usba_ep_writel(ep, CTL_ENB, USBA_EPT_ENABLE);
usba_writel(udc, TST, USBA_TST_PKT_MODE);
- copy_to_fifo(ep->fifo, test_packet_buffer,
+ memcpy_toio(ep->fifo, test_packet_buffer,
sizeof(test_packet_buffer));
usba_ep_writel(ep, SET_STA, USBA_TX_PK_RDY);
dev_info(dev, "Entering Test_Packet mode...\n");
@@ -1530,13 +1479,13 @@
DBG(DBG_HW, "Packet length: %u\n", pkt_len);
if (pkt_len != sizeof(crq)) {
pr_warning("udc: Invalid packet length %u "
- "(expected %lu)\n", pkt_len, sizeof(crq));
+ "(expected %zu)\n", pkt_len, sizeof(crq));
set_protocol_stall(udc, ep);
return;
}
DBG(DBG_FIFO, "Copying ctrl request from 0x%p:\n", ep->fifo);
- copy_from_fifo(crq.data, ep->fifo, sizeof(crq));
+ memcpy_fromio(crq.data, ep->fifo, sizeof(crq));
/* Free up one bank in the FIFO so that we can
* generate or receive a reply right away. */
@@ -1688,6 +1637,7 @@
DBG(DBG_INT, "irq, status=%#08x\n", status);
if (status & USBA_DET_SUSPEND) {
+ toggle_bias(0);
usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
DBG(DBG_BUS, "Suspend detected\n");
if (udc->gadget.speed != USB_SPEED_UNKNOWN
@@ -1699,6 +1649,7 @@
}
if (status & USBA_WAKE_UP) {
+ toggle_bias(1);
usba_writel(udc, INT_CLR, USBA_WAKE_UP);
DBG(DBG_BUS, "Wake Up CPU detected\n");
}
@@ -1792,12 +1743,14 @@
vbus = gpio_get_value(udc->vbus_pin);
if (vbus != udc->vbus_prev) {
if (vbus) {
- usba_writel(udc, CTRL, USBA_EN_USBA);
+ toggle_bias(1);
+ usba_writel(udc, CTRL, USBA_ENABLE_MASK);
usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
} else {
udc->gadget.speed = USB_SPEED_UNKNOWN;
reset_all_endpoints(udc);
- usba_writel(udc, CTRL, 0);
+ toggle_bias(0);
+ usba_writel(udc, CTRL, USBA_DISABLE_MASK);
spin_unlock(&udc->lock);
udc->driver->disconnect(&udc->gadget);
spin_lock(&udc->lock);
@@ -1850,7 +1803,8 @@
/* If Vbus is present, enable the controller and wait for reset */
spin_lock_irqsave(&udc->lock, flags);
if (vbus_is_present(udc) && udc->vbus_prev == 0) {
- usba_writel(udc, CTRL, USBA_EN_USBA);
+ toggle_bias(1);
+ usba_writel(udc, CTRL, USBA_ENABLE_MASK);
usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
}
spin_unlock_irqrestore(&udc->lock, flags);
@@ -1883,7 +1837,8 @@
spin_unlock_irqrestore(&udc->lock, flags);
/* This will also disable the DP pullup */
- usba_writel(udc, CTRL, 0);
+ toggle_bias(0);
+ usba_writel(udc, CTRL, USBA_DISABLE_MASK);
driver->unbind(&udc->gadget);
udc->gadget.dev.driver = NULL;
@@ -1908,7 +1863,7 @@
regs = platform_get_resource(pdev, IORESOURCE_MEM, CTRL_IOMEM_ID);
fifo = platform_get_resource(pdev, IORESOURCE_MEM, FIFO_IOMEM_ID);
- if (!regs || !fifo)
+ if (!regs || !fifo || !pdata)
return -ENXIO;
irq = platform_get_irq(pdev, 0);
@@ -1953,19 +1908,48 @@
/* Make sure we start from a clean slate */
clk_enable(pclk);
- usba_writel(udc, CTRL, 0);
+ toggle_bias(0);
+ usba_writel(udc, CTRL, USBA_DISABLE_MASK);
clk_disable(pclk);
+ usba_ep = kmalloc(sizeof(struct usba_ep) * pdata->num_ep,
+ GFP_KERNEL);
+ if (!usba_ep)
+ goto err_alloc_ep;
+
+ the_udc.gadget.ep0 = &usba_ep[0].ep;
+
INIT_LIST_HEAD(&usba_ep[0].ep.ep_list);
usba_ep[0].ep_regs = udc->regs + USBA_EPT_BASE(0);
usba_ep[0].dma_regs = udc->regs + USBA_DMA_BASE(0);
usba_ep[0].fifo = udc->fifo + USBA_FIFO_BASE(0);
- for (i = 1; i < ARRAY_SIZE(usba_ep); i++) {
+ usba_ep[0].ep.ops = &usba_ep_ops;
+ usba_ep[0].ep.name = pdata->ep[0].name;
+ usba_ep[0].ep.maxpacket = pdata->ep[0].fifo_size;
+ usba_ep[0].udc = &the_udc;
+ INIT_LIST_HEAD(&usba_ep[0].queue);
+ usba_ep[0].fifo_size = pdata->ep[0].fifo_size;
+ usba_ep[0].nr_banks = pdata->ep[0].nr_banks;
+ usba_ep[0].index = pdata->ep[0].index;
+ usba_ep[0].can_dma = pdata->ep[0].can_dma;
+ usba_ep[0].can_isoc = pdata->ep[0].can_isoc;
+
+ for (i = 1; i < pdata->num_ep; i++) {
struct usba_ep *ep = &usba_ep[i];
ep->ep_regs = udc->regs + USBA_EPT_BASE(i);
ep->dma_regs = udc->regs + USBA_DMA_BASE(i);
ep->fifo = udc->fifo + USBA_FIFO_BASE(i);
+ ep->ep.ops = &usba_ep_ops;
+ ep->ep.name = pdata->ep[i].name;
+ ep->ep.maxpacket = pdata->ep[i].fifo_size;
+ ep->udc = &the_udc;
+ INIT_LIST_HEAD(&ep->queue);
+ ep->fifo_size = pdata->ep[i].fifo_size;
+ ep->nr_banks = pdata->ep[i].nr_banks;
+ ep->index = pdata->ep[i].index;
+ ep->can_dma = pdata->ep[i].can_dma;
+ ep->can_isoc = pdata->ep[i].can_isoc;
list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
}
@@ -1984,7 +1968,7 @@
goto err_device_add;
}
- if (pdata && pdata->vbus_pin != GPIO_PIN_NONE) {
+ if (pdata->vbus_pin >= 0) {
if (!gpio_request(pdata->vbus_pin, "atmel_usba_udc")) {
udc->vbus_pin = pdata->vbus_pin;
@@ -2004,7 +1988,7 @@
}
usba_init_debugfs(udc);
- for (i = 1; i < ARRAY_SIZE(usba_ep); i++)
+ for (i = 1; i < pdata->num_ep; i++)
usba_ep_init_debugfs(udc, &usba_ep[i]);
return 0;
@@ -2012,6 +1996,8 @@
err_device_add:
free_irq(irq, udc);
err_request_irq:
+ kfree(usba_ep);
+err_alloc_ep:
iounmap(udc->fifo);
err_map_fifo:
iounmap(udc->regs);
@@ -2029,10 +2015,11 @@
{
struct usba_udc *udc;
int i;
+ struct usba_platform_data *pdata = pdev->dev.platform_data;
udc = platform_get_drvdata(pdev);
- for (i = 1; i < ARRAY_SIZE(usba_ep); i++)
+ for (i = 1; i < pdata->num_ep; i++)
usba_ep_cleanup_debugfs(&usba_ep[i]);
usba_cleanup_debugfs(udc);
@@ -2040,6 +2027,7 @@
gpio_free(udc->vbus_pin);
free_irq(udc->irq, udc);
+ kfree(usba_ep);
iounmap(udc->fifo);
iounmap(udc->regs);
clk_put(udc->hclk);
diff --exclude=.git -urN linux-2.6.25.6/drivers/usb/gadget/atmel_usba_udc.h avr32-2.6/drivers/usb/gadget/atmel_usba_udc.h
--- linux-2.6.25.6/drivers/usb/gadget/atmel_usba_udc.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/usb/gadget/atmel_usba_udc.h 2008-06-12 15:04:02.443815949 +0200
@@ -41,6 +41,15 @@
#define USBA_EN_USBA (1 << 8)
#define USBA_DETACH (1 << 9)
#define USBA_REMOTE_WAKE_UP (1 << 10)
+#define USBA_PULLD_DIS (1 << 11)
+
+#if defined(CONFIG_AVR32)
+#define USBA_ENABLE_MASK USBA_EN_USBA
+#define USBA_DISABLE_MASK 0
+#elif defined(CONFIG_ARCH_AT91)
+#define USBA_ENABLE_MASK (USBA_EN_USBA | USBA_PULLD_DIS)
+#define USBA_DISABLE_MASK USBA_DETACH
+#endif /* CONFIG_ARCH_AT91 */
/* Bitfields in FNUM */
#define USBA_MICRO_FRAME_NUM_OFFSET 0
diff --exclude=.git -urN linux-2.6.25.6/drivers/usb/gadget/Kconfig avr32-2.6/drivers/usb/gadget/Kconfig
--- linux-2.6.25.6/drivers/usb/gadget/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/usb/gadget/Kconfig 2008-06-12 15:09:42.582816057 +0200
@@ -118,10 +118,10 @@
config USB_GADGET_ATMEL_USBA
boolean "Atmel USBA"
select USB_GADGET_DUALSPEED
- depends on AVR32
+ depends on AVR32 || ARCH_AT91CAP9
help
USBA is the integrated high-speed USB Device controller on
- the AT32AP700x processors from Atmel.
+ the AT32AP700x and AT91CAP9 processors from Atmel.
config USB_ATMEL_USBA
tristate
diff --exclude=.git -urN linux-2.6.25.6/drivers/video/atmel_lcdfb.c avr32-2.6/drivers/video/atmel_lcdfb.c
--- linux-2.6.25.6/drivers/video/atmel_lcdfb.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/drivers/video/atmel_lcdfb.c 2008-06-12 15:09:43.343816340 +0200
@@ -38,7 +38,9 @@
#endif
#if defined(CONFIG_ARCH_AT91)
-#define ATMEL_LCDFB_FBINFO_DEFAULT FBINFO_DEFAULT
+#define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \
+ | FBINFO_PARTIAL_PAN_OK \
+ | FBINFO_HWACCEL_YPAN)
static inline void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
struct fb_var_screeninfo *var)
@@ -176,7 +178,7 @@
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
.xpanstep = 0,
- .ypanstep = 0,
+ .ypanstep = 1,
.ywrapstep = 0,
.accel = FB_ACCEL_NONE,
};
@@ -250,6 +252,8 @@
return -ENOMEM;
}
+ memset(info->screen_base, 0, info->fix.smem_len);
+
return 0;
}
@@ -634,7 +638,6 @@
struct fb_info *info = sinfo->info;
int ret = 0;
- memset_io(info->screen_base, 0, info->fix.smem_len);
info->var.activate |= FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW;
dev_info(info->device,
@@ -764,6 +767,11 @@
info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
if (!info->screen_base)
goto release_intmem;
+
+ /*
+ * Don't clear the framebuffer -- someone may have set
+ * up a splash image.
+ */
} else {
/* alocate memory buffer */
ret = atmel_lcdfb_alloc_video_memory(sinfo);
diff --exclude=.git -urN linux-2.6.25.6/fs/fs-writeback.c avr32-2.6/fs/fs-writeback.c
--- linux-2.6.25.6/fs/fs-writeback.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/fs/fs-writeback.c 2008-06-12 15:09:44.531816544 +0200
@@ -385,8 +385,6 @@
* WB_SYNC_HOLD is a hack for sys_sync(): reattach the inode to sb->s_dirty so
* that it can be located for waiting on in __writeback_single_inode().
*
- * Called under inode_lock.
- *
* If `bdi' is non-zero then we're being asked to writeback a specific queue.
* This function assumes that the blockdev superblock's inodes are backed by
* a variety of queues, so all inodes are searched. For other superblocks,
@@ -402,11 +400,12 @@
* on the writer throttling path, and we get decent balancing between many
* throttled threads: we don't want them all piling up on inode_sync_wait.
*/
-static void
-sync_sb_inodes(struct super_block *sb, struct writeback_control *wbc)
+void generic_sync_sb_inodes(struct super_block *sb,
+ struct writeback_control *wbc)
{
const unsigned long start = jiffies; /* livelock avoidance */
+ spin_lock(&inode_lock);
if (!wbc->for_kupdate || list_empty(&sb->s_io))
queue_io(sb, wbc->older_than_this);
@@ -485,8 +484,16 @@
if (!list_empty(&sb->s_more_io))
wbc->more_io = 1;
}
+ spin_unlock(&inode_lock);
return; /* Leave any unwritten inodes on s_io */
}
+EXPORT_SYMBOL_GPL(generic_sync_sb_inodes);
+
+static void sync_sb_inodes(struct super_block *sb,
+ struct writeback_control *wbc)
+{
+ generic_sync_sb_inodes(sb, wbc);
+}
/*
* Start writeback of dirty pagecache data against all unlocked inodes.
@@ -526,11 +533,8 @@
* be unmounted by the time it is released.
*/
if (down_read_trylock(&sb->s_umount)) {
- if (sb->s_root) {
- spin_lock(&inode_lock);
+ if (sb->s_root)
sync_sb_inodes(sb, wbc);
- spin_unlock(&inode_lock);
- }
up_read(&sb->s_umount);
}
spin_lock(&sb_lock);
@@ -568,9 +572,7 @@
(inodes_stat.nr_inodes - inodes_stat.nr_unused) +
nr_dirty + nr_unstable;
wbc.nr_to_write += wbc.nr_to_write / 2; /* Bit more for luck */
- spin_lock(&inode_lock);
sync_sb_inodes(sb, &wbc);
- spin_unlock(&inode_lock);
}
/*
diff --exclude=.git -urN linux-2.6.25.6/fs/Kconfig avr32-2.6/fs/Kconfig
--- linux-2.6.25.6/fs/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/fs/Kconfig 2008-06-12 15:09:43.915816293 +0200
@@ -1347,6 +1347,9 @@
endchoice
+# UBIFS File system configuration
+source "fs/ubifs/Kconfig"
+
config CRAMFS
tristate "Compressed ROM file system support (cramfs)"
depends on BLOCK
diff --exclude=.git -urN linux-2.6.25.6/fs/Makefile avr32-2.6/fs/Makefile
--- linux-2.6.25.6/fs/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/fs/Makefile 2008-06-12 15:09:43.915816293 +0200
@@ -100,6 +100,7 @@
obj-$(CONFIG_UFS_FS) += ufs/
obj-$(CONFIG_EFS_FS) += efs/
obj-$(CONFIG_JFFS2_FS) += jffs2/
+obj-$(CONFIG_UBIFS_FS) += ubifs/
obj-$(CONFIG_AFFS_FS) += affs/
obj-$(CONFIG_ROMFS_FS) += romfs/
obj-$(CONFIG_QNX4FS_FS) += qnx4/
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/budget.c avr32-2.6/fs/ubifs/budget.c
--- linux-2.6.25.6/fs/ubifs/budget.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/budget.c 2008-06-12 15:09:45.311815896 +0200
@@ -0,0 +1,863 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file implements the budgeting unit which is responsible for UBIFS space
+ * management.
+ *
+ * Factors such as compression, wasted space at the ends of LEBs, space in other
+ * journal heads, the effect of updates on the index, and so on, make it
+ * impossible to accurately predict the amount of space needed. Consequently
+ * approximations are used.
+ */
+
+#include "ubifs.h"
+#include <linux/writeback.h>
+#include <asm/div64.h>
+
+/*
+ * When pessimistic budget calculations say that there is no enough space,
+ * UBIFS starts writing back dirty inodes and pages, doing garbage collection,
+ * or committing. The below constants define maximum number of times UBIFS
+ * repeats the operations.
+ */
+#define MAX_SHRINK_RETRIES 8
+#define MAX_GC_RETRIES 4
+#define MAX_CMT_RETRIES 2
+#define MAX_NOSPC_RETRIES 1
+
+/*
+ * The below constant defines amount of dirty pages which should be written
+ * back at when trying to shrink the liability.
+ */
+#define NR_TO_WRITE 16
+
+/**
+ * struct retries_info - information about re-tries while making free space.
+ * @prev_liability: previous liability
+ * @shrink_cnt: how many times the liability was shrinked
+ * @shrink_retries: count of liability shrink re-tries (increased when
+ * liability does not shrink)
+ * @try_gc: GC should be tried first
+ * @gc_retries: how many times GC was run
+ * @cmt_retries: how many times commit has been done
+ * @nospc_retries: how many times GC returned %-ENOSPC
+ *
+ * Since we consider budgeting to be the fast-path, and this structure has to
+ * be allocated on stack and zeroed out, we make it smaller using bit-fields.
+ */
+struct retries_info {
+ long long prev_liability;
+ unsigned int shrink_cnt;
+ unsigned int shrink_retries:5;
+ unsigned int try_gc:1;
+ unsigned int gc_retries:4;
+ unsigned int cmt_retries:3;
+ unsigned int nospc_retries:1;
+};
+
+/**
+ * shrink_liability - write-back some dirty pages/inodes.
+ * @c: UBIFS file-system description object
+ * @nr_to_write: how many dirty pages to write-back
+ *
+ * This function shrinks UBIFS liability by means of writing back some amount
+ * of dirty inodes and their pages. Returns the amount of pages which were
+ * written back. The returned value does not include dirty inodes which were
+ * synchronized.
+ *
+ * Note, this function synchronizes even VFS inodes which are locked
+ * (@i_mutex) by the caller of the budgeting function, because write-back does
+ * not touch @i_mutex.
+ */
+static int shrink_liability(struct ubifs_info *c, int nr_to_write)
+{
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_NONE,
+ .range_end = LLONG_MAX,
+ .nr_to_write = nr_to_write,
+ };
+
+ generic_sync_sb_inodes(c->vfs_sb, &wbc);
+ dbg_budg("%ld pages were written back", nr_to_write - wbc.nr_to_write);
+ return nr_to_write - wbc.nr_to_write;
+}
+
+
+/**
+ * run_gc - run garbage collector.
+ * @c: UBIFS file-system description object
+ *
+ * This function runs garbage collector to make some more free space. Returns
+ * zero if a free LEB has been produced, %-EAGAIN if commit is required, and a
+ * negative error code in case of failure.
+ */
+static int run_gc(struct ubifs_info *c)
+{
+ int err, lnum;
+
+ /* Make some free space by garbage-collecting dirty space */
+ down_read(&c->commit_sem);
+ lnum = ubifs_garbage_collect(c, 1);
+ up_read(&c->commit_sem);
+ if (lnum < 0)
+ return lnum;
+
+ /* GC freed one LEB, return it to lprops */
+ dbg_budg("GC freed LEB %d", lnum);
+ err = ubifs_return_leb(c, lnum);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+/**
+ * make_free_space - make more free space on the file-system.
+ * @c: UBIFS file-system description object
+ * @ri: information about previous invocations of this function
+ *
+ * This function is called when an operation cannot be budgeted because there
+ * is supposedly no free space. But in most cases there is some free space:
+ * o budgeting is pessimistic, so it always budgets more then it is actually
+ * needed, so shrinking the liability is one way to make free space - the
+ * cached data will take less space then it was budgeted for;
+ * o GC may turn some dark space into free space (budgeting treats dark space
+ * as not available);
+ * o commit may free some LEB, i.e., turn freeable LEBs into free LEBs.
+ *
+ * So this function tries to do the above. Returns %-EAGAIN if some free space
+ * was presumably made and the caller has to re-try budgeting the operation.
+ * Returns %-ENOSPC if it couldn't do more free space, and other negative error
+ * codes on failures.
+ */
+static int make_free_space(struct ubifs_info *c, struct retries_info *ri)
+{
+ int err;
+
+ /*
+ * If we have some dirty pages and inodes (liability), try to write
+ * them back unless this was tried too many times without effect
+ * already.
+ */
+ if (ri->shrink_retries < MAX_SHRINK_RETRIES && !ri->try_gc) {
+ long long liability;
+
+ spin_lock(&c->space_lock);
+ liability = c->budg_idx_growth + c->budg_data_growth +
+ c->budg_dd_growth;
+ spin_unlock(&c->space_lock);
+
+ if (ri->prev_liability >= liability) {
+ /* Liability does not shrink, next time try GC then */
+ ri->shrink_retries += 1;
+ if (ri->gc_retries < MAX_GC_RETRIES)
+ ri->try_gc = 1;
+ dbg_budg("liability did not shrink: retries %d of %d",
+ ri->shrink_retries, MAX_SHRINK_RETRIES);
+ }
+
+ dbg_budg("force write-back (count %d)", ri->shrink_cnt);
+ shrink_liability(c, NR_TO_WRITE + ri->shrink_cnt);
+
+ ri->prev_liability = liability;
+ ri->shrink_cnt += 1;
+ return -EAGAIN;
+ }
+
+ /*
+ * Try to run garbage collector unless it was already tried too many
+ * times.
+ */
+ if (ri->gc_retries < MAX_GC_RETRIES) {
+ ri->gc_retries += 1;
+ dbg_budg("run GC, retries %d of %d",
+ ri->gc_retries, MAX_GC_RETRIES);
+
+ ri->try_gc = 0;
+ err = run_gc(c);
+ if (!err)
+ return -EAGAIN;
+
+ if (err == -EAGAIN) {
+ dbg_budg("GC asked to commit");
+ err = ubifs_run_commit(c);
+ if (err)
+ return err;
+ return -EAGAIN;
+ }
+
+ if (err != -ENOSPC)
+ return err;
+
+ /*
+ * GC could not make any progress. If this is the first time,
+ * then it makes sense to try to commit, because it might make
+ * some dirty space.
+ */
+ dbg_budg("GC returned -ENOSPC, retries %d",
+ ri->nospc_retries);
+ if (ri->nospc_retries >= MAX_NOSPC_RETRIES)
+ return err;
+ ri->nospc_retries += 1;
+ }
+
+ /* Neither GC nor write-back helped, try to commit */
+ if (ri->cmt_retries < MAX_CMT_RETRIES) {
+ ri->cmt_retries += 1;
+ dbg_budg("run commit, retries %d of %d",
+ ri->cmt_retries, MAX_CMT_RETRIES);
+ err = ubifs_run_commit(c);
+ if (err)
+ return err;
+ return -EAGAIN;
+ }
+
+ return -ENOSPC;
+}
+
+/**
+ * ubifs_calc_min_idx_lebs - calculate amount of eraseblocks for the index.
+ * @c: UBIFS file-system description object
+ *
+ * This function calculates and returns the number of eraseblocks which should
+ * be kept for index usage.
+ */
+int ubifs_calc_min_idx_lebs(struct ubifs_info *c)
+{
+ int ret;
+ uint64_t idx_size;
+
+ idx_size = c->old_idx_sz + c->budg_idx_growth + c->budg_uncommitted_idx;
+
+ /* And make sure we have twice the index size of space reserved */
+ idx_size <<= 1;
+
+ /*
+ * We do not maintain 'old_idx_size' as 'old_idx_lebs'/'old_idx_bytes'
+ * pair, nor similarly the two variables for the new index size, so we
+ * have to do this costly 64-bit division on fast-path.
+ */
+ if (do_div(idx_size, c->leb_size - c->max_idx_node_sz))
+ ret = idx_size + 1;
+ else
+ ret = idx_size;
+ /*
+ * The index head is not available for the in-the-gaps method, so add an
+ * extra LEB to compensate.
+ */
+ ret += 1;
+ /*
+ * At present the index needs at least 2 LEBs: one for the index head
+ * and one for in-the-gaps method (which currently does not cater for
+ * the index head and so excludes it from consideration).
+ */
+ if (ret < 2)
+ ret = 2;
+ return ret;
+}
+
+/**
+ * ubifs_calc_available - calculate available FS space.
+ * @c: UBIFS file-system description object
+ *
+ * This function calculates and returns amount of FS space available for use.
+ */
+long long ubifs_calc_available(const struct ubifs_info *c)
+{
+ long long available, subtract_lebs;
+
+ /*
+ * Force the amount available to the total size reported if the used
+ * space is zero.
+ */
+ if (c->lst.total_used <= UBIFS_INO_NODE_SZ &&
+ c->budg_data_growth + c->budg_dd_growth == 0) {
+ /* Do the same calculation as for c->block_cnt */
+ available = c->main_lebs - 2;
+ available *= c->leb_size - c->dark_wm;
+ return available;
+ }
+
+ available = c->main_bytes - c->lst.total_used;
+
+ /*
+ * Now 'available' contains theoretically available flash space
+ * assuming there is no index, so we have to subtract the space which
+ * is reserved for the index.
+ */
+ subtract_lebs = c->min_idx_lebs;
+
+ /* Take into account that GC reserves one LEB for its own needs */
+ subtract_lebs += 1;
+
+ /*
+ * The GC journal head LEB is not really accessible. And since
+ * different write types go to different heads, we may count only on
+ * one head's space.
+ */
+ subtract_lebs += c->jhead_cnt - 1;
+
+ /* We also reserve one LEB for deletions, which bypass budgeting */
+ subtract_lebs += 1;
+
+ available -= subtract_lebs * c->leb_size;
+
+ /* Subtract the dead space which is not available for use */
+ available -= c->lst.total_dead;
+
+ /*
+ * Subtract dark space, which might or might not be usable - it depends
+ * on the data which we have on the media and which will be written. If
+ * this is a lot of uncompressed or not-compressible data, the dark
+ * space cannot be used.
+ */
+ available -= c->lst.total_dark;
+
+ /*
+ * However, there is more dark space. The index may be bigger than
+ * min_idx_lebs. Those extra LEBs are assumed to be available, but
+ * their dark space is not included in total_dark, so it is subtracted
+ * here.
+ */
+ if (c->lst.idx_lebs > c->min_idx_lebs) {
+ subtract_lebs = c->lst.idx_lebs - c->min_idx_lebs;
+ available -= subtract_lebs * c->dark_wm;
+ }
+
+ /* The calculations are rough and may end up with a negative number */
+ return available > 0 ? available : 0;
+}
+
+/**
+ * rp_can_write - check whether the user is allowed to write.
+ * @c: UBIFS file-system description object
+ * @avail: available space on FS
+ *
+ * UBIFS has so-called "reserved pool" which is flash space reserved
+ * for the superuser and for uses whose UID/GID is recorded in UBIFS superblock.
+ * This function checks whether current user is allowed to write
+ * to the file-system - it returns %1 if there is plenty of space or the user
+ * is eligible to use the reserved pool and %0 otherwise.
+ */
+static int rp_can_write(struct ubifs_info *c, long long avail)
+{
+ if (avail > c->rp_size || current->fsuid == c->rp_uid ||
+ capable(CAP_SYS_RESOURCE) ||
+ (c->rp_gid != 0 && in_group_p(c->rp_gid)))
+ return 1;
+
+ return 0;
+}
+
+/**
+ * do_budget_space - reserve flash space for index and data growth.
+ * @c: UBIFS file-system description object
+ *
+ * This function makes sure UBIFS has enough free eraseblocks for index growth
+ * and data.
+ *
+ * When budgeting index space, UBIFS reserves twice as more LEBs as the index
+ * would take if it was consolidated and written to the flash. This guarantees
+ * that the "in-the-gaps" commit method always succeeds and UBIFS will always
+ * be able to commit dirty index. So this function basically adds amount of
+ * budgeted index space to the size of the current index, multiplies this by 2,
+ * and makes sure this does not exceed the amount of free eraseblocks.
+ *
+ * Notes about @c->min_idx_lebs and @c->lst.idx_lebs variables:
+ * o @c->lst.idx_lebs is the number of LEBs the index currently uses. It might
+ * be large, because UBIFS does not do any index consolidation as long as
+ * there is free space. IOW, the index may take a lot of LEBs, but the LEBs
+ * will contain a lot of dirt.
+ * o @c->min_idx_lebs is the the index presumably takes. IOW, the index may be
+ * consolidated to take up to @c->min_idx_lebs LEBs.
+ *
+ * This function returns zero in case of success, and %-ENOSPC in case of
+ * failure.
+ */
+static int do_budget_space(struct ubifs_info *c)
+{
+ long long outstanding, available;
+ int lebs, rsvd_idx_lebs, min_idx_lebs;
+
+ /* First budget index space */
+ min_idx_lebs = ubifs_calc_min_idx_lebs(c);
+
+ /* Now 'min_idx_lebs' contains number of LEBs to reserve */
+ if (min_idx_lebs > c->lst.idx_lebs)
+ rsvd_idx_lebs = min_idx_lebs - c->lst.idx_lebs;
+ else
+ rsvd_idx_lebs = 0;
+
+ /*
+ * The number of LEBs that are available to be used by the index is:
+ *
+ * @c->lst.empty_lebs + @c->freeable_cnt + @c->idx_gc_cnt -
+ * @c->lst.taken_empty_lebs
+ *
+ * @empty_lebs are available because they are empty. @freeable_cnt are
+ * available because they contain only free and dirty space and the
+ * index allocation always occurs after wbufs are synch'ed.
+ * @idx_gc_cnt are available because they are index LEBs that have been
+ * garbage collected (including trivial GC) and are awaiting the commit
+ * before they can be unmapped - note that the in-the-gaps method will
+ * grab these if it needs them. @taken_empty_lebs are empty_lebs that
+ * have already been allocated for some purpose (also includes those
+ * LEBs on the @idx_gc list).
+ *
+ * Note, @taken_empty_lebs may temporarily be higher by one because of
+ * the way we serialize LEB allocations and budgeting. See a comment in
+ * 'ubifs_find_free_space()'.
+ */
+ lebs = c->lst.empty_lebs + c->freeable_cnt + c->idx_gc_cnt -
+ c->lst.taken_empty_lebs;
+ if (unlikely(rsvd_idx_lebs > lebs)) {
+ dbg_budg("out of indexing space: min_idx_lebs %d (old %d), "
+ "rsvd_idx_lebs %d", min_idx_lebs, c->min_idx_lebs,
+ rsvd_idx_lebs);
+ return -ENOSPC;
+ }
+
+ available = ubifs_calc_available(c);
+ outstanding = c->budg_data_growth + c->budg_dd_growth;
+
+ if (unlikely(available < outstanding)) {
+ dbg_budg("out of data space: available %lld, outstanding %lld",
+ available, outstanding);
+ return -ENOSPC;
+ }
+
+ if (!rp_can_write(c, available - outstanding))
+ return -ENOSPC;
+
+ c->min_idx_lebs = min_idx_lebs;
+ return 0;
+}
+
+/**
+ * calc_idx_growth - calculate approximate index growth from budgeting request.
+ * @c: UBIFS file-system description object
+ * @req: budgeting request
+ *
+ * For now we assume each new node adds one znode. But this is rather poor
+ * approximation, though.
+ */
+static int calc_idx_growth(const struct ubifs_info *c,
+ const struct ubifs_budget_req *req)
+{
+ int znodes;
+
+ znodes = req->new_ino + (req->new_page << UBIFS_BLOCKS_PER_PAGE_SHIFT) +
+ req->new_dent;
+ return znodes * c->max_idx_node_sz;
+}
+
+/**
+ * calc_data_growth - calculate approximate amount of new data from budgeting
+ * request.
+ * @c: UBIFS file-system description object
+ * @req: budgeting request
+ */
+static int calc_data_growth(const struct ubifs_info *c,
+ const struct ubifs_budget_req *req)
+{
+ int data_growth;
+
+ data_growth = req->new_ino ? c->inode_budget : 0;
+ if (req->new_page)
+ data_growth += c->page_budget;
+ if (req->new_dent)
+ data_growth += c->dent_budget;
+ data_growth += req->new_ino_d;
+
+ return data_growth;
+}
+
+/**
+ * calc_dd_growth - calculate approximate amount of data which makes other data
+ * dirty from budgeting request.
+ * @c: UBIFS file-system description object
+ * @req: budgeting request
+ */
+static int calc_dd_growth(const struct ubifs_info *c,
+ const struct ubifs_budget_req *req)
+{
+ int dd_growth;
+
+ dd_growth = req->dirtied_page ? c->page_budget : 0;
+
+ if (req->dirtied_ino)
+ dd_growth += c->inode_budget << (req->dirtied_ino - 1);
+ if (req->mod_dent)
+ dd_growth += c->dent_budget;
+ dd_growth += req->dirtied_ino_d;
+
+ return dd_growth;
+}
+
+/**
+ * ubifs_budget_space - ensure there is enough space to complete an operation.
+ * @c: UBIFS file-system description object
+ * @req: budget request
+ *
+ * This function allocates budget for an operation. It uses pessimistic
+ * approximation of how much flash space the operation needs. The goal of this
+ * function is to make sure UBIFS always has flash space to flush all dirty
+ * pages, dirty inodes, and dirty znodes (liability). This function may force
+ * commit, garbage-collection or write-back. Returns zero in case of success,
+ * %-ENOSPC if there is no free space and other negative error codes in case of
+ * failures.
+ */
+int ubifs_budget_space(struct ubifs_info *c, struct ubifs_budget_req *req)
+{
+ int uninitialized_var(cmt_retries), uninitialized_var(wb_retries);
+ int err, idx_growth, data_growth, dd_growth;
+ struct retries_info ri;
+
+ data_growth = calc_data_growth(c, req);
+ dd_growth = calc_dd_growth(c, req);
+ if (!data_growth && !dd_growth)
+ return 0;
+ idx_growth = calc_idx_growth(c, req);
+ memset(&ri, 0, sizeof(struct retries_info));
+
+again:
+ spin_lock(&c->space_lock);
+ ubifs_assert(c->budg_idx_growth >= 0);
+ ubifs_assert(c->budg_data_growth >= 0);
+ ubifs_assert(c->budg_dd_growth >= 0);
+
+ c->budg_idx_growth += idx_growth;
+ c->budg_data_growth += data_growth;
+ c->budg_dd_growth += dd_growth;
+
+ err = do_budget_space(c);
+ if (unlikely(err)) {
+ /* Restore the old values */
+ c->budg_idx_growth -= idx_growth;
+ c->budg_data_growth -= data_growth;
+ c->budg_dd_growth -= dd_growth;
+ spin_unlock(&c->space_lock);
+
+ goto make_space;
+ }
+
+ req->idx_growth = idx_growth;
+ req->data_growth = data_growth;
+ req->dd_growth = dd_growth;
+ spin_unlock(&c->space_lock);
+
+ return 0;
+
+make_space:
+ err = make_free_space(c, &ri);
+ if (err == -EAGAIN) {
+ dbg_budg("try again");
+ cond_resched();
+ goto again;
+ } else if (err == -ENOSPC)
+ dbg_budg("FS is full, -ENOSPC");
+ else
+ ubifs_err("cannot budget space, error %d", err);
+
+ return err;
+}
+
+/**
+ * ubifs_release_budget - release budgeted free space.
+ * @c: UBIFS file-system description object
+ * @req: budget request
+ *
+ * This function releases the space budgeted by 'ubifs_budget_space()'. Note,
+ * since the index changes (which were budgeted for in @req->idx_growth) will
+ * only be written to the media on commit, this function moves the index budget
+ * from @c->budg_idx_growth to @c->budg_uncommitted_idx. The latter will be
+ * zeroed by the commit operation.
+ */
+void ubifs_release_budget(struct ubifs_info *c, struct ubifs_budget_req *req)
+{
+ if (!req->data_growth && !req->dd_growth)
+ return;
+
+ if (req->idx_growth == -1)
+ req->idx_growth = calc_idx_growth(c, req);
+
+ spin_lock(&c->space_lock);
+ c->budg_idx_growth -= req->idx_growth;
+ c->budg_uncommitted_idx += req->idx_growth;
+ c->budg_data_growth -= req->data_growth;
+ c->budg_dd_growth -= req->dd_growth;
+ c->min_idx_lebs = ubifs_calc_min_idx_lebs(c);
+
+ ubifs_assert(c->budg_idx_growth >= 0);
+ ubifs_assert(c->budg_data_growth >= 0);
+ ubifs_assert(c->min_idx_lebs < c->main_lebs);
+ spin_unlock(&c->space_lock);
+}
+
+/**
+ * ubifs_convert_page_budget - convert budget of a new page.
+ * @c: UBIFS file-system description object
+ *
+ * This function converts budget which was allocated for a new page of data to
+ * the budget of changing an existing page of data. The latter is not larger
+ * then the former, so this function only does simple re-calculation and does
+ * not involve any write-back.
+ */
+void ubifs_convert_page_budget(struct ubifs_info *c)
+{
+ spin_lock(&c->space_lock);
+ /* Release the index growth reservation */
+ c->budg_idx_growth -= c->max_idx_node_sz << UBIFS_BLOCKS_PER_PAGE_SHIFT;
+ /* Release the data growth reservation */
+ c->budg_data_growth -= c->page_budget;
+ /* Increase the dirty data growth reservation instead */
+ c->budg_dd_growth += c->page_budget;
+ /* And re-calculate the indexing space reservation */
+ c->min_idx_lebs = ubifs_calc_min_idx_lebs(c);
+ spin_unlock(&c->space_lock);
+}
+
+/**
+ * ubifs_budget_inode_op - budget an operation on inode.
+ * @c: UBIFS file-system description object
+ * @inode: VFS inode which will be made dirty by the operation
+ * @req: budget request of the operation
+ *
+ * This function is called to get budget for an operation which changes an
+ * inode. The inode may be in dirty or clean state. The former means there is
+ * no need to allocate the budget as it has already been allocated before. The
+ * latter means that the inode change budget has to be allocated.
+ *
+ * The caller has to pass the inode which is going to be changed. This function
+ * acquires budget the for as described in @req plus the budget for changing
+ * the inode dirty, if needed. Returns zero in case of success, %-ENOSPC if
+ * there is no more flash space, and other negative error codes in case of
+ * failure.
+ *
+ * Note, upon exit, this function leaves the inode locked, and the
+ * 'ubifs_release_ino_dirty()' or 'ubifs_release_ino_clean()' function has to
+ * be called to unlock it.
+ */
+int ubifs_budget_inode_op(struct ubifs_info *c, struct inode *inode,
+ struct ubifs_budget_req *req)
+{
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ int err, old = req->dirtied_ino;
+
+ ubifs_assert(req->dirtied_ino <= 3);
+ ubifs_assert(req->dirtied_ino_d <= UBIFS_MAX_INO_DATA * 3);
+
+again:
+ /*
+ * If the inode is clean, it will be dirtied by this operation and we
+ * have to budget for this.
+ */
+ req->dirtied_ino += !ui->dirty;
+ if (req->dirtied_ino > old)
+ req->dirtied_ino_d += ui->data_len;
+
+ /*
+ * Note, if the budget request does not actually request anything
+ * (i.e., @req contains only zeroes), 'ubifs_budget_space()' will
+ * return almost straight away.
+ */
+ err = ubifs_budget_space(c, req);
+ if (unlikely(err))
+ return err;
+
+ mutex_lock(&ui->budg_mutex);
+
+ if (req->dirtied_ino != old + !ui->dirty) {
+ /* The inode has probably been written back meanwhile */
+ ubifs_release_budget(c, req);
+ mutex_unlock(&ui->budg_mutex);
+ req->dirtied_ino = old;
+ req->dirtied_ino_d -= ui->data_len;
+ goto again;
+ }
+
+ UBIFS_DBG(ui->budgeted = 1);
+ return 0;
+}
+
+/**
+ * ubifs_release_ino_dirty - release budget of a "dirtying" operation.
+ * @c: UBIFS file-system description object
+ * @inode: VFS inode the operation worked on
+ * @req: budget to release
+ *
+ * This function has to be called at the end of VFS operations which acquired
+ * budget via 'ubifs_budget_inode_op()'. It assumes that the inode has been
+ * marked as dirty and will be synchronized later by write-back, so it does not
+ * release the budget of the inode.
+ *
+ * Note, this function also avoids releasing page budgets which are released
+ * separately.
+ */
+void ubifs_release_ino_dirty(struct ubifs_info *c, struct inode *inode,
+ struct ubifs_budget_req *req)
+{
+ ubifs_assert(req->dirtied_ino <= 4);
+ ubifs_assert(req->dirtied_ino_d <= UBIFS_MAX_INO_DATA * 4);
+ ubifs_assert(req->idx_growth >= 0);
+ ubifs_assert(req->data_growth >= 0);
+ ubifs_assert(req->dd_growth >= 0);
+
+ if (req->dirtied_ino) {
+ req->dd_growth -= c->inode_budget;
+ req->dd_growth -= req->dirtied_ino_d;
+ }
+
+ if (req->dirtied_page) {
+ req->dd_growth -= c->page_budget;
+ ubifs_assert(req->new_page == 0);
+ } else if (req->new_page) {
+ req->idx_growth -=
+ c->max_idx_node_sz << UBIFS_BLOCKS_PER_PAGE_SHIFT;
+ req->data_growth -= c->page_budget;
+ ubifs_assert(req->dirtied_page == 0);
+ }
+
+ ubifs_assert(req->dd_growth >= 0);
+ ubifs_release_budget(c, req);
+ mutex_unlock(&ubifs_inode(inode)->budg_mutex);
+}
+
+/**
+ * ubifs_cancel_ino_op - cancel budget of an operation on inode.
+ * @c: UBIFS file-system description object
+ * @inode: VFS inode the operation worked on
+ * @req: budget to release
+ *
+ * This function has to be called if the operation failed and whole budget has
+ * to be released, including the budget for inode which would had been
+ * dirtied. It is important not to mark the inode dirty before calling this
+ * function.
+ */
+void ubifs_cancel_ino_op(struct ubifs_info *c, struct inode *inode,
+ struct ubifs_budget_req *req)
+{
+ ubifs_assert(req->dirtied_ino <= 4);
+ ubifs_assert(req->dirtied_ino_d <= UBIFS_MAX_INO_DATA * 4);
+ ubifs_assert(req->idx_growth >= 0);
+ ubifs_assert(req->data_growth >= 0);
+ ubifs_assert(req->dd_growth >= 0);
+
+ ubifs_release_budget(c, req);
+ mutex_unlock(&ubifs_inode(inode)->budg_mutex);
+}
+
+/**
+ * ubifs_release_ino_clean - release budget of a "cleaning" operation.
+ * @c: UBIFS file-system description object
+ * @inode: VFS inode the operation worked on
+ * @req: budget to release
+ *
+ * This function has to be called at the end of VFS operations which acquired
+ * budget via 'ubifs_budget_inode_op()'. It assumed the operation synchronized
+ * the inode, so it marks the inode clean, unlocks it and releases whole budget.
+ *
+ * Note, this function also avoids releasing page budgets which are released
+ * separately.
+ */
+void ubifs_release_ino_clean(struct ubifs_info *c, struct inode *inode,
+ struct ubifs_budget_req *req)
+{
+ struct ubifs_inode *ui = ubifs_inode(inode);
+
+ ubifs_assert(req->dirtied_ino <= 4);
+ ubifs_assert(req->dirtied_ino_d <= UBIFS_MAX_INO_DATA * 4);
+ ubifs_assert(req->idx_growth >= 0);
+ ubifs_assert(req->data_growth >= 0);
+ ubifs_assert(req->dd_growth >= 0);
+ ubifs_assert(!req->dirtied_page);
+ ubifs_assert(!req->new_page);
+ UBIFS_DBG(ui->budgeted = 0);
+
+ ubifs_release_budget(c, req);
+ if (ui->dirty) {
+ ui->dirty = 0;
+ /*
+ * Note, VFS still treats the inode as dirty and
+ * 'ubifs_write_inode()' will be called, but it'll do nothing
+ * because @ui->dirty is %0.
+ */
+ atomic_long_dec(&c->dirty_ino_cnt);
+ }
+ mutex_unlock(&ubifs_inode(inode)->budg_mutex);
+}
+
+/**
+ * ubifs_release_new_page_budget - release budget of a new page.
+ * @c: UBIFS file-system description object
+ *
+ * This is a helper function which releases budget corresponding to the budget
+ * of one new page of data.
+ */
+void ubifs_release_new_page_budget(struct ubifs_info *c)
+{
+ struct ubifs_budget_req req = { .new_page = 1,
+ .idx_growth = -1,
+ .data_growth = c->page_budget };
+
+ ubifs_release_budget(c, &req);
+}
+
+/**
+ * ubifs_budg_get_free_space - return amount of free space.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns amount of free space on the file-system.
+ */
+long long ubifs_budg_get_free_space(struct ubifs_info *c)
+{
+ int min_idx_lebs, rsvd_idx_lebs;
+ long long available, outstanding, free;
+
+ /* Do exactly the same calculations as in 'do_budget_space()' */
+ spin_lock(&c->space_lock);
+ min_idx_lebs = ubifs_calc_min_idx_lebs(c);
+
+ if (min_idx_lebs > c->lst.idx_lebs)
+ rsvd_idx_lebs = min_idx_lebs - c->lst.idx_lebs;
+ else
+ rsvd_idx_lebs = 0;
+
+ if (rsvd_idx_lebs > c->lst.empty_lebs + c->freeable_cnt + c->idx_gc_cnt
+ - c->lst.taken_empty_lebs) {
+ spin_unlock(&c->space_lock);
+ return 0;
+ }
+
+ c->min_idx_lebs = min_idx_lebs;
+ available = ubifs_calc_available(c);
+ outstanding = c->budg_data_growth + c->budg_dd_growth;
+ spin_unlock(&c->space_lock);
+
+ if (available > outstanding)
+ free = ubifs_reported_space(c, available - outstanding);
+ else
+ free = 0;
+
+ return free;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/commit.c avr32-2.6/fs/ubifs/commit.c
--- linux-2.6.25.6/fs/ubifs/commit.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/commit.c 2008-06-12 15:09:45.311815896 +0200
@@ -0,0 +1,677 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file implements functions that manage the running of the commit process.
+ * Each affected module has its own functions to accomplish their part in the
+ * commit and those functions are called here.
+ *
+ * The commit is the process whereby all updates to the index and LEB properties
+ * are written out together and the journal becomes empty. This keeps the
+ * file system consistent - at all times the state can be recreated by reading
+ * the index and LEB properties and then replaying the journal.
+ *
+ * The commit is split into two parts named "commit start" and "commit end".
+ * During commit start, the commit process has exclusive access to the journal
+ * by holding the commit semaphore down for writing. As few I/O operations as
+ * possible are performed during commit start, instead the nodes that are to be
+ * written are merely identified. During commit end, the commit semaphore is no
+ * longer held and the journal is again in operation, allowing users to continue
+ * to use the file system while the bulk of the commit I/O is performed. The
+ * purpose of this two-step approach is to prevent the commit from causing any
+ * latency blips. Note that in any case, the commit does not prevent lookups
+ * (as permitted by the TNC mutex), or access to VFS data structures e.g. page
+ * cache.
+ */
+
+#include <linux/freezer.h>
+#include <linux/kthread.h>
+#include "ubifs.h"
+
+/**
+ * do_commit - commit the journal.
+ * @c: UBIFS file-system description object
+ *
+ * This function implements UBIFS commit. It has to be called with commit lock
+ * locked. Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+static int do_commit(struct ubifs_info *c)
+{
+ int err, new_ltail_lnum, old_ltail_lnum, i;
+ struct ubifs_zbranch zroot;
+ struct ubifs_lp_stats lst;
+
+ dbg_cmt("start");
+ if (c->ro_media) {
+ err = -EROFS;
+ goto out_up;
+ }
+
+ /* Sync all write buffers (necessary for recovery) */
+ for (i = 0; i < c->jhead_cnt; i++) {
+ err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
+ if (err)
+ goto out_up;
+ }
+
+ err = ubifs_gc_start_commit(c);
+ if (err)
+ goto out_up;
+ err = dbg_check_lprops(c);
+ if (err)
+ goto out_up;
+ err = ubifs_log_start_commit(c, &new_ltail_lnum);
+ if (err)
+ goto out_up;
+ err = ubifs_tnc_start_commit(c, &zroot);
+ if (err)
+ goto out_up;
+ err = ubifs_lpt_start_commit(c);
+ if (err)
+ goto out_up;
+ err = ubifs_orphan_start_commit(c);
+ if (err)
+ goto out_up;
+
+ ubifs_get_lp_stats(c, &lst);
+
+ up_write(&c->commit_sem);
+
+ err = ubifs_tnc_end_commit(c);
+ if (err)
+ goto out;
+ err = ubifs_lpt_end_commit(c);
+ if (err)
+ goto out;
+ err = ubifs_orphan_end_commit(c);
+ if (err)
+ goto out;
+ old_ltail_lnum = c->ltail_lnum;
+ err = ubifs_log_end_commit(c, new_ltail_lnum);
+ if (err)
+ goto out;
+ err = dbg_check_old_index(c, &zroot);
+ if (err)
+ goto out;
+
+ mutex_lock(&c->mst_mutex);
+ c->mst_node->cmt_no = cpu_to_le64(++c->cmt_no);
+ c->mst_node->log_lnum = cpu_to_le32(new_ltail_lnum);
+ c->mst_node->root_lnum = cpu_to_le32(zroot.lnum);
+ c->mst_node->root_offs = cpu_to_le32(zroot.offs);
+ c->mst_node->root_len = cpu_to_le32(zroot.len);
+ c->mst_node->ihead_lnum = cpu_to_le32(c->ihead_lnum);
+ c->mst_node->ihead_offs = cpu_to_le32(c->ihead_offs);
+ c->mst_node->index_size = cpu_to_le64(c->old_idx_sz);
+ c->mst_node->lpt_lnum = cpu_to_le32(c->lpt_lnum);
+ c->mst_node->lpt_offs = cpu_to_le32(c->lpt_offs);
+ c->mst_node->nhead_lnum = cpu_to_le32(c->nhead_lnum);
+ c->mst_node->nhead_offs = cpu_to_le32(c->nhead_offs);
+ c->mst_node->ltab_lnum = cpu_to_le32(c->ltab_lnum);
+ c->mst_node->ltab_offs = cpu_to_le32(c->ltab_offs);
+ c->mst_node->lsave_lnum = cpu_to_le32(c->lsave_lnum);
+ c->mst_node->lsave_offs = cpu_to_le32(c->lsave_offs);
+ c->mst_node->lscan_lnum = cpu_to_le32(c->lscan_lnum);
+ c->mst_node->empty_lebs = cpu_to_le32(lst.empty_lebs);
+ c->mst_node->idx_lebs = cpu_to_le32(lst.idx_lebs);
+ c->mst_node->total_free = cpu_to_le64(lst.total_free);
+ c->mst_node->total_dirty = cpu_to_le64(lst.total_dirty);
+ c->mst_node->total_used = cpu_to_le64(lst.total_used);
+ c->mst_node->total_dead = cpu_to_le64(lst.total_dead);
+ c->mst_node->total_dark = cpu_to_le64(lst.total_dark);
+ if (c->no_orphs)
+ c->mst_node->flags |= cpu_to_le32(UBIFS_MST_NO_ORPHS);
+ else
+ c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_NO_ORPHS);
+ err = ubifs_write_master(c);
+ mutex_unlock(&c->mst_mutex);
+ if (err)
+ goto out;
+
+ err = ubifs_log_post_commit(c, old_ltail_lnum);
+ if (err)
+ goto out;
+ err = ubifs_gc_end_commit(c);
+ if (err)
+ goto out;
+ err = ubifs_lpt_post_commit(c);
+ if (err)
+ goto out;
+
+ spin_lock(&c->cs_lock);
+ c->cmt_state = COMMIT_RESTING;
+ wake_up(&c->cmt_wq);
+ dbg_cmt("commit end");
+ spin_unlock(&c->cs_lock);
+
+ return 0;
+
+out_up:
+ up_write(&c->commit_sem);
+out:
+ ubifs_err("commit failed, error %d", err);
+ spin_lock(&c->cs_lock);
+ c->cmt_state = COMMIT_BROKEN;
+ wake_up(&c->cmt_wq);
+ spin_unlock(&c->cs_lock);
+ ubifs_ro_mode(c, err);
+ return err;
+}
+
+/**
+ * run_bg_commit - run background commit if it is needed.
+ * @c: UBIFS file-system description object
+ *
+ * This function runs background commit if it is needed. Returns zero in case
+ * of success and a negative error code in case of failure.
+ */
+static int run_bg_commit(struct ubifs_info *c)
+{
+ spin_lock(&c->cs_lock);
+ /*
+ * Run background commit only if background commit was requested or if
+ * commit is required.
+ */
+ if (c->cmt_state != COMMIT_BACKGROUND &&
+ c->cmt_state != COMMIT_REQUIRED)
+ goto out;
+ spin_unlock(&c->cs_lock);
+
+ down_write(&c->commit_sem);
+ spin_lock(&c->cs_lock);
+ if (c->cmt_state == COMMIT_REQUIRED)
+ c->cmt_state = COMMIT_RUNNING_REQUIRED;
+ else if (c->cmt_state == COMMIT_BACKGROUND)
+ c->cmt_state = COMMIT_RUNNING_BACKGROUND;
+ else
+ goto out_cmt_unlock;
+ spin_unlock(&c->cs_lock);
+
+ return do_commit(c);
+
+out_cmt_unlock:
+ up_write(&c->commit_sem);
+out:
+ spin_unlock(&c->cs_lock);
+ return 0;
+}
+
+/**
+ * ubifs_bg_thread - UBIFS background thread function.
+ * @info: points to the file-system description object
+ *
+ * This function implements various file-system background activities:
+ * o when a write-buffer timer expires it synchronizes the appropriate
+ * write-buffer;
+ * o when the journal is about to be full, it starts in-advance commit.
+ *
+ * Note, other stuff like background garbage collection may be added here in
+ * future.
+ */
+int ubifs_bg_thread(void *info)
+{
+ int err;
+ struct ubifs_info *c = info;
+
+ ubifs_msg("background thread \"%s\" started, PID %d",
+ c->bgt_name, current->pid);
+ set_freezable();
+
+ while (1) {
+ if (kthread_should_stop())
+ break;
+
+ if (try_to_freeze())
+ continue;
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ /* Check if there is something to do */
+ if (!c->need_bgt) {
+ /*
+ * Nothing prevents us from going sleep now and
+ * be never woken up and block the task which
+ * could wait in 'kthread_stop()' forever.
+ */
+ if (kthread_should_stop())
+ break;
+ schedule();
+ continue;
+ } else
+ __set_current_state(TASK_RUNNING);
+
+ c->need_bgt = 0;
+ err = ubifs_bg_wbufs_sync(c);
+ if (err)
+ ubifs_ro_mode(c, err);
+
+ run_bg_commit(c);
+ cond_resched();
+ }
+
+ dbg_msg("background thread \"%s\" stops", c->bgt_name);
+ return 0;
+}
+
+/**
+ * ubifs_commit_required - set commit state to "required".
+ * @c: UBIFS file-system description object
+ *
+ * This function is called if a commit is required but cannot be done from the
+ * calling function, so it is just flagged instead.
+ */
+void ubifs_commit_required(struct ubifs_info *c)
+{
+ spin_lock(&c->cs_lock);
+ switch (c->cmt_state) {
+ case COMMIT_RESTING:
+ case COMMIT_BACKGROUND:
+ dbg_cmt("old: %s, new: %s", dbg_cstate(c->cmt_state),
+ dbg_cstate(COMMIT_REQUIRED));
+ c->cmt_state = COMMIT_REQUIRED;
+ break;
+ case COMMIT_RUNNING_BACKGROUND:
+ dbg_cmt("old: %s, new: %s", dbg_cstate(c->cmt_state),
+ dbg_cstate(COMMIT_RUNNING_REQUIRED));
+ c->cmt_state = COMMIT_RUNNING_REQUIRED;
+ break;
+ case COMMIT_REQUIRED:
+ case COMMIT_RUNNING_REQUIRED:
+ case COMMIT_BROKEN:
+ break;
+ }
+ spin_unlock(&c->cs_lock);
+}
+
+/**
+ * ubifs_request_bg_commit - notify the background thread to do a commit.
+ * @c: UBIFS file-system description object
+ *
+ * This function is called if the journal is full enough to make a commit
+ * worthwhile, so background thread is kicked to start it.
+ */
+void ubifs_request_bg_commit(struct ubifs_info *c)
+{
+ spin_lock(&c->cs_lock);
+ if (c->cmt_state == COMMIT_RESTING) {
+ dbg_cmt("old: %s, new: %s", dbg_cstate(c->cmt_state),
+ dbg_cstate(COMMIT_BACKGROUND));
+ c->cmt_state = COMMIT_BACKGROUND;
+ spin_unlock(&c->cs_lock);
+ ubifs_wake_up_bgt(c);
+ } else
+ spin_unlock(&c->cs_lock);
+}
+
+/**
+ * wait_for_commit - wait for commit.
+ * @c: UBIFS file-system description object
+ *
+ * This function sleeps until the commit operation is no longer running.
+ */
+static int wait_for_commit(struct ubifs_info *c)
+{
+ dbg_cmt("pid %d goes sleep", current->pid);
+
+ /*
+ * The following sleeps if the condition is false, and will be woken
+ * when the commit ends. It is possible, although very unlikely, that we
+ * will wake up and see the subsequent commit running, rather than the
+ * one we were waiting for, and go back to sleep. However, we will be
+ * woken again, so there is no danger of sleeping forever.
+ */
+ wait_event(c->cmt_wq, c->cmt_state != COMMIT_RUNNING_BACKGROUND &&
+ c->cmt_state != COMMIT_RUNNING_REQUIRED);
+ dbg_cmt("commit finished, pid %d woke up", current->pid);
+ return 0;
+}
+
+/**
+ * ubifs_run_commit - run or wait for commit.
+ * @c: UBIFS file-system description object
+ *
+ * This function runs commit and returns zero in case of success and a negative
+ * error code in case of failure.
+ */
+int ubifs_run_commit(struct ubifs_info *c)
+{
+ int err = 0;
+
+ spin_lock(&c->cs_lock);
+ if (c->cmt_state == COMMIT_BROKEN) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (c->cmt_state == COMMIT_RUNNING_BACKGROUND)
+ /*
+ * We set the commit state to 'running required' to indicate
+ * that we want it to complete as quickly as possible.
+ */
+ c->cmt_state = COMMIT_RUNNING_REQUIRED;
+
+ if (c->cmt_state == COMMIT_RUNNING_REQUIRED) {
+ spin_unlock(&c->cs_lock);
+ return wait_for_commit(c);
+ }
+ spin_unlock(&c->cs_lock);
+
+ /* Ok, the commit is indeed needed */
+
+ down_write(&c->commit_sem);
+ spin_lock(&c->cs_lock);
+ /*
+ * Since we unlocked 'c->cs_lock', the state may have changed, so
+ * re-check it.
+ */
+ if (c->cmt_state == COMMIT_BROKEN) {
+ err = -EINVAL;
+ goto out_cmt_unlock;
+ }
+
+ if (c->cmt_state == COMMIT_RUNNING_BACKGROUND)
+ c->cmt_state = COMMIT_RUNNING_REQUIRED;
+
+ if (c->cmt_state == COMMIT_RUNNING_REQUIRED) {
+ up_write(&c->commit_sem);
+ spin_unlock(&c->cs_lock);
+ return wait_for_commit(c);
+ }
+ c->cmt_state = COMMIT_RUNNING_REQUIRED;
+ spin_unlock(&c->cs_lock);
+
+ err = do_commit(c);
+ return err;
+
+out_cmt_unlock:
+ up_write(&c->commit_sem);
+out:
+ spin_unlock(&c->cs_lock);
+ return err;
+}
+
+/**
+ * ubifs_gc_should_commit - determine if it is time for GC to run commit.
+ * @c: UBIFS file-system description object
+ *
+ * This function is called by garbage collection to determine if commit should
+ * be run. If commit state is @COMMIT_BACKGROUND, which means that the journal
+ * is full enough to start commit, this function returns true. It is not
+ * absolutely necessary to commit yet, but it feels like this should be better
+ * then to keep doing GC. This function returns %1 if GC has to initiate commit
+ * and %0 if not.
+ */
+int ubifs_gc_should_commit(struct ubifs_info *c)
+{
+ int ret = 0;
+
+ spin_lock(&c->cs_lock);
+ if (c->cmt_state == COMMIT_BACKGROUND) {
+ dbg_cmt("commit required now");
+ c->cmt_state = COMMIT_REQUIRED;
+ } else
+ dbg_cmt("commit not requested");
+ if (c->cmt_state == COMMIT_REQUIRED)
+ ret = 1;
+ spin_unlock(&c->cs_lock);
+ return ret;
+}
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+
+/**
+ * struct idx_node - hold index nodes during index tree traversal.
+ * @list: list
+ * @iip: index in parent (slot number of this indexing node in the parent
+ * indexing node)
+ * @upper_key: all keys in this indexing node have to be less or equivalent to
+ * this key
+ * @idx: index node (8-byte aligned because all node structures must be 8-byte
+ * aligned)
+ */
+struct idx_node {
+ struct list_head list;
+ int iip;
+ union ubifs_key upper_key;
+ struct ubifs_idx_node idx __attribute__((aligned(8)));
+};
+
+/**
+ * dbg_old_index_check_init - get information for the next old index check.
+ * @c: UBIFS file-system description object
+ * @zroot: root of the index
+ *
+ * This function records information about the index that will be needed for the
+ * next old index check i.e. 'dbg_check_old_index()'.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int dbg_old_index_check_init(struct ubifs_info *c, struct ubifs_zbranch *zroot)
+{
+ struct ubifs_idx_node *idx;
+ int lnum, offs, len, err = 0;
+
+ c->old_zroot = *zroot;
+
+ lnum = c->old_zroot.lnum;
+ offs = c->old_zroot.offs;
+ len = c->old_zroot.len;
+
+ idx = kmalloc(c->max_idx_node_sz, GFP_NOFS);
+ if (!idx)
+ return -ENOMEM;
+
+ err = ubifs_read_node(c, idx, UBIFS_IDX_NODE, len, lnum, offs);
+ if (err)
+ goto out;
+
+ c->old_zroot_level = le16_to_cpu(idx->level);
+ c->old_zroot_sqnum = le64_to_cpu(idx->ch.sqnum);
+out:
+ kfree(idx);
+ return err;
+}
+
+/**
+ * dbg_check_old_index - check the old copy of the index.
+ * @c: UBIFS file-system description object
+ * @zroot: root of the new index
+ *
+ * In order to be able to recover from an unclean unmount, a complete copy of
+ * the index must exist on flash. This is the "old" index. The commit process
+ * must write the "new" index to flash without overwriting or destroying any
+ * part of the old index. This function is run at commit end in order to check
+ * that the old index does indeed exist completely intact.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot)
+{
+ int lnum, offs, len, err = 0, uninitialized_var(last_level), child_cnt;
+ int first = 1, iip;
+ union ubifs_key lower_key, upper_key, l_key, u_key;
+ unsigned long long uninitialized_var(last_sqnum);
+ struct ubifs_idx_node *idx;
+ struct list_head list;
+ struct idx_node *i;
+ size_t sz;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_OLD_IDX))
+ goto out;
+
+ INIT_LIST_HEAD(&list);
+
+ sz = sizeof(struct idx_node) + ubifs_idx_node_sz(c, c->fanout) -
+ UBIFS_IDX_NODE_SZ;
+
+ /* Start at the old zroot */
+ lnum = c->old_zroot.lnum;
+ offs = c->old_zroot.offs;
+ len = c->old_zroot.len;
+ iip = 0;
+
+ /*
+ * Traverse the index tree preorder depth-first i.e. do a node and then
+ * its subtrees from left to right.
+ */
+ while (1) {
+ struct ubifs_branch *br;
+
+ /* Get the next index node */
+ i = kmalloc(sz, GFP_NOFS);
+ if (!i) {
+ err = -ENOMEM;
+ goto out_free;
+ }
+ i->iip = iip;
+ /* Keep the index nodes on our path in a linked list */
+ list_add_tail(&i->list, &list);
+ /* Read the index node */
+ idx = &i->idx;
+ err = ubifs_read_node(c, idx, UBIFS_IDX_NODE, len, lnum, offs);
+ if (err)
+ goto out_free;
+ /* Validate index node */
+ child_cnt = le16_to_cpu(idx->child_cnt);
+ if (child_cnt < 1 || child_cnt > c->fanout) {
+ err = 1;
+ goto out_dump;
+ }
+ if (first) {
+ first = 0;
+ /* Check root level and sqnum */
+ if (le16_to_cpu(idx->level) != c->old_zroot_level) {
+ err = 2;
+ goto out_dump;
+ }
+ if (le64_to_cpu(idx->ch.sqnum) != c->old_zroot_sqnum) {
+ err = 3;
+ goto out_dump;
+ }
+ /* Set last values as though root had a parent */
+ last_level = le16_to_cpu(idx->level) + 1;
+ last_sqnum = le64_to_cpu(idx->ch.sqnum) + 1;
+ key_read(c, ubifs_idx_key(c, idx), &lower_key);
+ highest_ino_key(c, &upper_key, INUM_WATERMARK);
+ }
+ key_copy(c, &upper_key, &i->upper_key);
+ if (le16_to_cpu(idx->level) != last_level - 1) {
+ err = 3;
+ goto out_dump;
+ }
+ /*
+ * The index is always written bottom up hence a child's sqnum
+ * is always less than the parents.
+ */
+ if (le64_to_cpu(idx->ch.sqnum) >= last_sqnum) {
+ err = 4;
+ goto out_dump;
+ }
+ /* Check key range */
+ key_read(c, ubifs_idx_key(c, idx), &l_key);
+ br = ubifs_idx_branch(c, idx, child_cnt - 1);
+ key_read(c, &br->key, &u_key);
+ if (keys_cmp(c, &lower_key, &l_key) > 0) {
+ err = 5;
+ goto out_dump;
+ }
+ if (keys_cmp(c, &upper_key, &u_key) < 0) {
+ err = 6;
+ goto out_dump;
+ }
+ if (keys_cmp(c, &upper_key, &u_key) == 0)
+ if (!is_hash_key(c, &u_key)) {
+ err = 7;
+ goto out_dump;
+ }
+ /* Go to next index node */
+ if (le16_to_cpu(idx->level) == 0) {
+ /* At the bottom, so go up until can go right */
+ while (1) {
+ /* Drop the bottom of the list */
+ list_del(&i->list);
+ kfree(i);
+ /* No more list means we are done */
+ if (list_empty(&list))
+ goto out;
+ /* Look at the new bottom */
+ i = list_entry(list.prev, struct idx_node,
+ list);
+ idx = &i->idx;
+ /* Can we go right */
+ if (iip + 1 < le16_to_cpu(idx->child_cnt)) {
+ iip = iip + 1;
+ break;
+ } else
+ /* Nope, so go up again */
+ iip = i->iip;
+ }
+ } else
+ /* Go down left */
+ iip = 0;
+ /*
+ * We have the parent in 'idx' and now we set up for reading the
+ * child pointed to by slot 'iip'.
+ */
+ last_level = le16_to_cpu(idx->level);
+ last_sqnum = le64_to_cpu(idx->ch.sqnum);
+ br = ubifs_idx_branch(c, idx, iip);
+ lnum = le32_to_cpu(br->lnum);
+ offs = le32_to_cpu(br->offs);
+ len = le32_to_cpu(br->len);
+ key_read(c, &br->key, &lower_key);
+ if (iip + 1 < le16_to_cpu(idx->child_cnt)) {
+ br = ubifs_idx_branch(c, idx, iip + 1);
+ key_read(c, &br->key, &upper_key);
+ } else
+ key_copy(c, &i->upper_key, &upper_key);
+ }
+out:
+ err = dbg_old_index_check_init(c, zroot);
+ if (err)
+ goto out_free;
+
+ return 0;
+
+out_dump:
+ dbg_err("dumping index node (iip=%d)", i->iip);
+ dbg_dump_node(c, idx);
+ list_del(&i->list);
+ kfree(i);
+ if (!list_empty(&list)) {
+ i = list_entry(list.prev, struct idx_node, list);
+ dbg_err("dumping parent index node");
+ dbg_dump_node(c, &i->idx);
+ }
+out_free:
+ while (!list_empty(&list)) {
+ i = list_entry(list.next, struct idx_node, list);
+ list_del(&i->list);
+ kfree(i);
+ }
+ ubifs_err("failed, error %d", err);
+ if (err > 0)
+ err = -EINVAL;
+ return err;
+}
+
+#endif /* CONFIG_UBIFS_FS_DEBUG */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/compress.c avr32-2.6/fs/ubifs/compress.c
--- linux-2.6.25.6/fs/ubifs/compress.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/compress.c 2008-06-12 15:09:45.315815846 +0200
@@ -0,0 +1,253 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ * Copyright (C) 2006, 2007 University of Szeged, Hungary
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ * Zoltan Sogor
+ */
+
+/*
+ * This file provides a single place to access to compression and
+ * decompression.
+ */
+
+#include <linux/crypto.h>
+#include "ubifs.h"
+
+/* Fake description object for the "none" compressor */
+static struct ubifs_compressor none_compr = {
+ .compr_type = UBIFS_COMPR_NONE,
+ .name = "no compression",
+ .capi_name = "",
+};
+
+#ifdef CONFIG_UBIFS_FS_LZO
+static DEFINE_MUTEX(lzo_mutex);
+
+static struct ubifs_compressor lzo_compr = {
+ .compr_type = UBIFS_COMPR_LZO,
+ .comp_mutex = &lzo_mutex,
+ .name = "LZO",
+ .capi_name = "lzo",
+};
+#else
+static struct ubifs_compressor lzo_compr = {
+ .compr_type = UBIFS_COMPR_LZO,
+ .name = "LZO",
+};
+#endif
+
+#ifdef CONFIG_UBIFS_FS_ZLIB
+static DEFINE_MUTEX(deflate_mutex);
+static DEFINE_MUTEX(inflate_mutex);
+
+static struct ubifs_compressor zlib_compr = {
+ .compr_type = UBIFS_COMPR_ZLIB,
+ .comp_mutex = &deflate_mutex,
+ .decomp_mutex = &inflate_mutex,
+ .name = "zlib",
+ .capi_name = "deflate",
+};
+#else
+static struct ubifs_compressor zlib_compr = {
+ .compr_type = UBIFS_COMPR_ZLIB,
+ .name = "zlib",
+};
+#endif
+
+/* All UBIFS compressors */
+struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
+
+/**
+ * ubifs_compress - compress data.
+ * @in_buf: data to compress
+ * @in_len: length of the data to compress
+ * @out_buf: output buffer where compressed data should be stored
+ * @out_len: output buffer length is returned here
+ * @compr_type: type of compression to use on enter, actually used compression
+ * type on exit
+ *
+ * This function compresses input buffer @in_buf of length @in_len and stores
+ * the result in the output buffer @out_buf and the resulting length in
+ * @out_len. If the input buffer does not compress, it is just copied to the
+ * @out_buf. The same happens if @compr_type is %UBIFS_COMPR_NONE or if
+ * compression error occurred.
+ *
+ * Note, if the input buffer was not compressed, it is copied to the output
+ * buffer and %UBIFS_COMPR_NONE is returned in @compr_type.
+ *
+ * This functions returns %0 on success or a negative error code on failure.
+ */
+void ubifs_compress(const void *in_buf, int in_len, void *out_buf, int *out_len,
+ int *compr_type)
+{
+ int err;
+ struct ubifs_compressor *compr = ubifs_compressors[*compr_type];
+
+ if (*compr_type == UBIFS_COMPR_NONE)
+ goto no_compr;
+
+ /* If the input data is small, do not even try to compress it */
+ if (in_len < UBIFS_MIN_COMPR_LEN)
+ goto no_compr;
+
+ if (compr->comp_mutex)
+ mutex_lock(compr->comp_mutex);
+ err = crypto_comp_compress(compr->cc, in_buf, in_len, out_buf,
+ out_len);
+ if (compr->comp_mutex)
+ mutex_unlock(compr->comp_mutex);
+ if (unlikely(err)) {
+ ubifs_warn("cannot compress %d bytes, compressor %s, "
+ "error %d, leave data uncompressed",
+ in_len, compr->name, err);
+ goto no_compr;
+ }
+
+ /*
+ * Presently, we just require that compression results in less data,
+ * rather than any defined minimum compression ratio or amount.
+ */
+ if (ALIGN(*out_len, 8) >= ALIGN(in_len, 8))
+ goto no_compr;
+
+ return;
+
+no_compr:
+ memcpy(out_buf, in_buf, in_len);
+ *out_len = in_len;
+ *compr_type = UBIFS_COMPR_NONE;
+}
+
+/**
+ * ubifs_decompress - decompress data.
+ * @in_buf: data to decompress
+ * @in_len: length of the data to decompress
+ * @out_buf: output buffer where decompressed data should
+ * @out_len: output length is returned here
+ * @compr_type: type of compression
+ *
+ * This function decompresses data from buffer @in_buf into buffer @out_buf.
+ * The length of the uncompressed data is returned in @out_len. This functions
+ * returns %0 on success or a negative error code on failure.
+ */
+int ubifs_decompress(const void *in_buf, int in_len, void *out_buf,
+ int *out_len, int compr_type)
+{
+ int err;
+ struct ubifs_compressor *compr;
+
+ if (unlikely(compr_type < 0 || compr_type >= UBIFS_COMPR_TYPES_CNT)) {
+ ubifs_err("invalid compression type %d", compr_type);
+ return -EINVAL;
+ }
+
+ compr = ubifs_compressors[compr_type];
+
+ if (unlikely(!compr->capi_name)) {
+ ubifs_err("%s compression is not compiled in", compr->name);
+ return -EINVAL;
+ }
+
+ if (compr_type == UBIFS_COMPR_NONE) {
+ memcpy(out_buf, in_buf, in_len);
+ *out_len = in_len;
+ return 0;
+ }
+
+ if (compr->decomp_mutex)
+ mutex_lock(compr->decomp_mutex);
+ err = crypto_comp_decompress(compr->cc, in_buf, in_len, out_buf,
+ out_len);
+ if (compr->decomp_mutex)
+ mutex_unlock(compr->decomp_mutex);
+ if (err)
+ ubifs_err("cannot decompress %d bytes, compressor %s, "
+ "error %d", in_len, compr->name, err);
+
+ return err;
+}
+
+/**
+ * compr_init - initialize a compressor.
+ * @compr: compressor description object
+ *
+ * This function initializes the requested compressor and returns zero in case
+ * of success or a negative error code in case of failure.
+ */
+static int __init compr_init(struct ubifs_compressor *compr)
+{
+ if (compr->capi_name) {
+ compr->cc = crypto_alloc_comp(compr->capi_name, 0, 0);
+ if (IS_ERR(compr->cc)) {
+ ubifs_err("cannot initialize compressor %s, error %ld",
+ compr->name, PTR_ERR(compr->cc));
+ return PTR_ERR(compr->cc);
+ }
+ }
+
+ ubifs_compressors[compr->compr_type] = compr;
+ return 0;
+}
+
+/**
+ * compr_exit - de-initialize a compressor.
+ * @compr: compressor description object
+ */
+static void compr_exit(struct ubifs_compressor *compr)
+{
+ if (compr->capi_name)
+ crypto_free_comp(compr->cc);
+ return;
+}
+
+/**
+ * ubifs_compressors_init - initialize UBIFS compressors.
+ *
+ * This function initializes the compressor which were compiled in. Returns
+ * zero in case of success and a negative error code in case of failure.
+ */
+int __init ubifs_compressors_init(void)
+{
+ int err;
+
+ err = compr_init(&lzo_compr);
+ if (err)
+ return err;
+
+ err = compr_init(&zlib_compr);
+ if (err)
+ goto out_lzo;
+
+ ubifs_compressors[UBIFS_COMPR_NONE] = &none_compr;
+ return 0;
+
+out_lzo:
+ compr_exit(&lzo_compr);
+ return err;
+}
+
+/**
+ * ubifs_compressors_exit - de-initialize UBIFS compressors.
+ */
+void __exit ubifs_compressors_exit(void)
+{
+ compr_exit(&lzo_compr);
+ compr_exit(&zlib_compr);
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/debug.c avr32-2.6/fs/ubifs/debug.c
--- linux-2.6.25.6/fs/ubifs/debug.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/debug.c 2008-06-12 15:09:45.315815846 +0200
@@ -0,0 +1,2210 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file implements most of the debugging stuff which is compiled in only
+ * when it is enabled. But some debugging check functions are implemented in
+ * corresponding subsystem, just because they are closely related and utilize
+ * various local functions of those subsystems.
+ */
+
+#define UBIFS_DBG_PRESERVE_UBI
+
+#include "ubifs.h"
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+
+DEFINE_SPINLOCK(dbg_lock);
+
+static char dbg_key_buf0[128];
+static char dbg_key_buf1[128];
+
+unsigned int ubifs_msg_flags = UBIFS_MSG_FLAGS_DEFAULT;
+unsigned int ubifs_chk_flags = UBIFS_CHK_FLAGS_DEFAULT;
+unsigned int ubifs_tst_flags;
+
+module_param_named(debug_msgs, ubifs_msg_flags, uint, S_IRUGO | S_IWUSR);
+module_param_named(debug_chks, ubifs_chk_flags, uint, S_IRUGO | S_IWUSR);
+module_param_named(debug_tsts, ubifs_tst_flags, uint, S_IRUGO | S_IWUSR);
+
+MODULE_PARM_DESC(debug_msgs, "Debug message type flags");
+MODULE_PARM_DESC(debug_chks, "Debug check flags");
+MODULE_PARM_DESC(debug_tsts, "Debug special test flags");
+
+static const char *get_key_fmt(int fmt)
+{
+ switch (fmt) {
+ case UBIFS_SIMPLE_KEY_FMT:
+ return "simple";
+ default:
+ return "unknown/invalid format";
+ }
+}
+
+static const char *get_key_hash(int hash)
+{
+ switch (hash) {
+ case UBIFS_KEY_HASH_R5:
+ return "R5";
+ case UBIFS_KEY_HASH_TEST:
+ return "test";
+ default:
+ return "unknown/invalid name hash";
+ }
+}
+
+static const char *get_key_type(int type)
+{
+ switch (type) {
+ case UBIFS_INO_KEY:
+ return "inode";
+ case UBIFS_DENT_KEY:
+ return "direntry";
+ case UBIFS_XENT_KEY:
+ return "xentry";
+ case UBIFS_DATA_KEY:
+ return "data";
+ case UBIFS_TRUN_KEY:
+ return "truncate";
+ default:
+ return "unknown/invalid key";
+ }
+}
+
+static void sprintf_key(const struct ubifs_info *c, const union ubifs_key *key,
+ char *buffer)
+{
+ char *p = buffer;
+ int type = key_type(c, key);
+
+ if (c->key_fmt == UBIFS_SIMPLE_KEY_FMT) {
+ switch (type) {
+ case UBIFS_INO_KEY:
+ sprintf(p, "(%lu, %s)", key_inum(c, key),
+ get_key_type(type));
+ break;
+ case UBIFS_DENT_KEY:
+ case UBIFS_XENT_KEY:
+ sprintf(p, "(%lu, %s, %#08x)", key_inum(c, key),
+ get_key_type(type), key_hash(c, key));
+ break;
+ case UBIFS_DATA_KEY:
+ sprintf(p, "(%lu, %s, %u)", key_inum(c, key),
+ get_key_type(type), key_block(c, key));
+ break;
+ case UBIFS_TRUN_KEY:
+ sprintf(p, "(%lu, %s)",
+ key_inum(c, key), get_key_type(type));
+ break;
+ default:
+ sprintf(p, "(bad key type: %#08x, %#08x)",
+ key->u32[0], key->u32[1]);
+ }
+ } else
+ sprintf(p, "bad key format %d", c->key_fmt);
+}
+
+const char *dbg_key_str0(const struct ubifs_info *c, const union ubifs_key *key)
+{
+ /* dbg_lock must be held */
+ sprintf_key(c, key, dbg_key_buf0);
+ return dbg_key_buf0;
+}
+
+const char *dbg_key_str1(const struct ubifs_info *c, const union ubifs_key *key)
+{
+ /* dbg_lock must be held */
+ sprintf_key(c, key, dbg_key_buf1);
+ return dbg_key_buf1;
+}
+
+const char *dbg_ntype(int type)
+{
+ switch (type) {
+ case UBIFS_PAD_NODE:
+ return "padding node";
+ case UBIFS_SB_NODE:
+ return "superblock node";
+ case UBIFS_MST_NODE:
+ return "master node";
+ case UBIFS_REF_NODE:
+ return "reference node";
+ case UBIFS_INO_NODE:
+ return "inode node";
+ case UBIFS_DENT_NODE:
+ return "direntry node";
+ case UBIFS_XENT_NODE:
+ return "xentry node";
+ case UBIFS_DATA_NODE:
+ return "data node";
+ case UBIFS_TRUN_NODE:
+ return "truncate node";
+ case UBIFS_IDX_NODE:
+ return "indexing node";
+ case UBIFS_CS_NODE:
+ return "commit start node";
+ case UBIFS_ORPH_NODE:
+ return "orphan node";
+ default:
+ return "unknown node";
+ }
+}
+
+static const char *dbg_gtype(int type)
+{
+ switch (type) {
+ case UBIFS_NO_NODE_GROUP:
+ return "no node group";
+ case UBIFS_IN_NODE_GROUP:
+ return "in node group";
+ case UBIFS_LAST_OF_NODE_GROUP:
+ return "last of node group";
+ default:
+ return "unknown";
+ }
+}
+
+const char *dbg_cstate(int cmt_state)
+{
+ switch (cmt_state) {
+ case COMMIT_RESTING:
+ return "commit resting";
+ case COMMIT_BACKGROUND:
+ return "background commit requested";
+ case COMMIT_REQUIRED:
+ return "commit required";
+ case COMMIT_RUNNING_BACKGROUND:
+ return "BACKGROUND commit running";
+ case COMMIT_RUNNING_REQUIRED:
+ return "commit running and required";
+ case COMMIT_BROKEN:
+ return "broken commit";
+ default:
+ return "unknown commit state";
+ }
+}
+
+static void dump_ch(const struct ubifs_ch *ch)
+{
+ printk(KERN_DEBUG "\tmagic %#x\n", le32_to_cpu(ch->magic));
+ printk(KERN_DEBUG "\tcrc %#x\n", le32_to_cpu(ch->crc));
+ printk(KERN_DEBUG "\tnode_type %d (%s)\n", ch->node_type,
+ dbg_ntype(ch->node_type));
+ printk(KERN_DEBUG "\tgroup_type %d (%s)\n", ch->group_type,
+ dbg_gtype(ch->group_type));
+ printk(KERN_DEBUG "\tsqnum %llu\n",
+ (unsigned long long)le64_to_cpu(ch->sqnum));
+ printk(KERN_DEBUG "\tlen %u\n", le32_to_cpu(ch->len));
+}
+
+void dbg_dump_inode(const struct ubifs_info *c, const struct inode *inode)
+{
+ const struct ubifs_inode *ui = ubifs_inode(inode);
+
+ printk(KERN_DEBUG "inode %lu\n", inode->i_ino);
+ printk(KERN_DEBUG "size %llu\n",
+ (unsigned long long)i_size_read(inode));
+ printk(KERN_DEBUG "nlink %u\n", inode->i_nlink);
+ printk(KERN_DEBUG "uid %u\n", (unsigned int)inode->i_uid);
+ printk(KERN_DEBUG "gid %u\n", (unsigned int)inode->i_gid);
+ printk(KERN_DEBUG "atime %u.%u\n",
+ (unsigned int)inode->i_atime.tv_sec,
+ (unsigned int)inode->i_atime.tv_nsec);
+ printk(KERN_DEBUG "mtime %u.%u\n",
+ (unsigned int)inode->i_mtime.tv_sec,
+ (unsigned int)inode->i_mtime.tv_nsec);
+ printk(KERN_DEBUG "ctime %u.%u\n",
+ (unsigned int)inode->i_ctime.tv_sec,
+ (unsigned int)inode->i_ctime.tv_nsec);
+ printk(KERN_DEBUG "creat_sqnum %llu\n", ui->creat_sqnum);
+ printk(KERN_DEBUG "xattr_size %lld\n", ui->xattr_size);
+ printk(KERN_DEBUG "xattr_cnt %d\n", ui->xattr_cnt);
+ printk(KERN_DEBUG "xattr_names %d\n", ui->xattr_names);
+ printk(KERN_DEBUG "dirty %u\n", ui->dirty);
+ printk(KERN_DEBUG "xattr %u\n", ui->xattr);
+ printk(KERN_DEBUG "flags %d\n", ui->flags);
+ printk(KERN_DEBUG "compr_type %d\n", ui->compr_type);
+ printk(KERN_DEBUG "data_len %d\n", ui->data_len);
+}
+
+void dbg_dump_node(const struct ubifs_info *c, const void *node)
+{
+ int i, n;
+ union ubifs_key key;
+ const struct ubifs_ch *ch = node;
+
+ if (dbg_failure_mode)
+ return;
+
+ /* If the magic is incorrect, just hexdump the first bytes */
+ if (le32_to_cpu(ch->magic) != UBIFS_NODE_MAGIC) {
+ printk(KERN_DEBUG "Not a node, first %zu bytes:", UBIFS_CH_SZ);
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
+ (void *)node, UBIFS_CH_SZ, 1);
+ return;
+ }
+
+ spin_lock(&dbg_lock);
+ dump_ch(node);
+
+ switch (ch->node_type) {
+ case UBIFS_PAD_NODE:
+ {
+ const struct ubifs_pad_node *pad = node;
+
+ printk(KERN_DEBUG "\tpad_len %u\n",
+ le32_to_cpu(pad->pad_len));
+ break;
+ }
+ case UBIFS_SB_NODE:
+ {
+ const struct ubifs_sb_node *sup = node;
+ unsigned int sup_flags = le32_to_cpu(sup->flags);
+
+ printk(KERN_DEBUG "\tkey_hash %d (%s)\n",
+ (int)sup->key_hash, get_key_hash(sup->key_hash));
+ printk(KERN_DEBUG "\tkey_fmt %d (%s)\n",
+ (int)sup->key_fmt, get_key_fmt(sup->key_fmt));
+ printk(KERN_DEBUG "\tflags %#x\n", sup_flags);
+ printk(KERN_DEBUG "\t big_lpt %u\n",
+ !!(sup_flags & UBIFS_FLG_BIGLPT));
+ printk(KERN_DEBUG "\tmin_io_size %u\n",
+ le32_to_cpu(sup->min_io_size));
+ printk(KERN_DEBUG "\tleb_size %u\n",
+ le32_to_cpu(sup->leb_size));
+ printk(KERN_DEBUG "\tleb_cnt %u\n",
+ le32_to_cpu(sup->leb_cnt));
+ printk(KERN_DEBUG "\tmax_leb_cnt %u\n",
+ le32_to_cpu(sup->max_leb_cnt));
+ printk(KERN_DEBUG "\tmax_bud_bytes %llu\n",
+ (unsigned long long)le64_to_cpu(sup->max_bud_bytes));
+ printk(KERN_DEBUG "\tlog_lebs %u\n",
+ le32_to_cpu(sup->log_lebs));
+ printk(KERN_DEBUG "\tlpt_lebs %u\n",
+ le32_to_cpu(sup->lpt_lebs));
+ printk(KERN_DEBUG "\torph_lebs %u\n",
+ le32_to_cpu(sup->orph_lebs));
+ printk(KERN_DEBUG "\tjhead_cnt %u\n",
+ le32_to_cpu(sup->jhead_cnt));
+ printk(KERN_DEBUG "\tfanout %u\n",
+ le32_to_cpu(sup->fanout));
+ printk(KERN_DEBUG "\tlsave_cnt %u\n",
+ le32_to_cpu(sup->lsave_cnt));
+ printk(KERN_DEBUG "\tdefault_compr %u\n",
+ (int)le16_to_cpu(sup->default_compr));
+ printk(KERN_DEBUG "\trp_size %llu\n",
+ (unsigned long long)le64_to_cpu(sup->rp_size));
+ printk(KERN_DEBUG "\trp_uid %u\n",
+ le32_to_cpu(sup->rp_uid));
+ printk(KERN_DEBUG "\trp_gid %u\n",
+ le32_to_cpu(sup->rp_gid));
+ printk(KERN_DEBUG "\tfmt_version %u\n",
+ le32_to_cpu(sup->fmt_version));
+ printk(KERN_DEBUG "\ttime_gran %u\n",
+ le32_to_cpu(sup->time_gran));
+ printk(KERN_DEBUG "\tUUID %02X%02X%02X%02X-%02X%02X"
+ "-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X\n",
+ sup->uuid[0], sup->uuid[1], sup->uuid[2], sup->uuid[3],
+ sup->uuid[4], sup->uuid[5], sup->uuid[6], sup->uuid[7],
+ sup->uuid[8], sup->uuid[9], sup->uuid[10], sup->uuid[11],
+ sup->uuid[12], sup->uuid[13], sup->uuid[14],
+ sup->uuid[15]);
+ break;
+ }
+ case UBIFS_MST_NODE:
+ {
+ const struct ubifs_mst_node *mst = node;
+
+ printk(KERN_DEBUG "\thighest_inum %llu\n",
+ (unsigned long long)le64_to_cpu(mst->highest_inum));
+ printk(KERN_DEBUG "\tcommit number %llu\n",
+ (unsigned long long)le64_to_cpu(mst->cmt_no));
+ printk(KERN_DEBUG "\tflags %#x\n",
+ le32_to_cpu(mst->flags));
+ printk(KERN_DEBUG "\tlog_lnum %u\n",
+ le32_to_cpu(mst->log_lnum));
+ printk(KERN_DEBUG "\troot_lnum %u\n",
+ le32_to_cpu(mst->root_lnum));
+ printk(KERN_DEBUG "\troot_offs %u\n",
+ le32_to_cpu(mst->root_offs));
+ printk(KERN_DEBUG "\troot_len %u\n",
+ le32_to_cpu(mst->root_len));
+ printk(KERN_DEBUG "\tgc_lnum %u\n",
+ le32_to_cpu(mst->gc_lnum));
+ printk(KERN_DEBUG "\tihead_lnum %u\n",
+ le32_to_cpu(mst->ihead_lnum));
+ printk(KERN_DEBUG "\tihead_offs %u\n",
+ le32_to_cpu(mst->ihead_offs));
+ printk(KERN_DEBUG "\tindex_size %u\n",
+ le32_to_cpu(mst->index_size));
+ printk(KERN_DEBUG "\tlpt_lnum %u\n",
+ le32_to_cpu(mst->lpt_lnum));
+ printk(KERN_DEBUG "\tlpt_offs %u\n",
+ le32_to_cpu(mst->lpt_offs));
+ printk(KERN_DEBUG "\tnhead_lnum %u\n",
+ le32_to_cpu(mst->nhead_lnum));
+ printk(KERN_DEBUG "\tnhead_offs %u\n",
+ le32_to_cpu(mst->nhead_offs));
+ printk(KERN_DEBUG "\tltab_lnum %u\n",
+ le32_to_cpu(mst->ltab_lnum));
+ printk(KERN_DEBUG "\tltab_offs %u\n",
+ le32_to_cpu(mst->ltab_offs));
+ printk(KERN_DEBUG "\tlsave_lnum %u\n",
+ le32_to_cpu(mst->lsave_lnum));
+ printk(KERN_DEBUG "\tlsave_offs %u\n",
+ le32_to_cpu(mst->lsave_offs));
+ printk(KERN_DEBUG "\tlscan_lnum %u\n",
+ le32_to_cpu(mst->lscan_lnum));
+ printk(KERN_DEBUG "\tleb_cnt %u\n",
+ le32_to_cpu(mst->leb_cnt));
+ printk(KERN_DEBUG "\tempty_lebs %u\n",
+ le32_to_cpu(mst->empty_lebs));
+ printk(KERN_DEBUG "\tidx_lebs %u\n",
+ le32_to_cpu(mst->idx_lebs));
+ printk(KERN_DEBUG "\ttotal_free %llu\n",
+ (unsigned long long)le64_to_cpu(mst->total_free));
+ printk(KERN_DEBUG "\ttotal_dirty %llu\n",
+ (unsigned long long)le64_to_cpu(mst->total_dirty));
+ printk(KERN_DEBUG "\ttotal_used %llu\n",
+ (unsigned long long)le64_to_cpu(mst->total_used));
+ printk(KERN_DEBUG "\ttotal_dead %llu\n",
+ (unsigned long long)le64_to_cpu(mst->total_dead));
+ printk(KERN_DEBUG "\ttotal_dark %llu\n",
+ (unsigned long long)le64_to_cpu(mst->total_dark));
+ break;
+ }
+ case UBIFS_REF_NODE:
+ {
+ const struct ubifs_ref_node *ref = node;
+
+ printk(KERN_DEBUG "\tlnum %u\n",
+ le32_to_cpu(ref->lnum));
+ printk(KERN_DEBUG "\toffs %u\n",
+ le32_to_cpu(ref->offs));
+ printk(KERN_DEBUG "\tjhead %u\n",
+ le32_to_cpu(ref->jhead));
+ break;
+ }
+ case UBIFS_INO_NODE:
+ {
+ const struct ubifs_ino_node *ino = node;
+
+ key_read(c, &ino->key, &key);
+ printk(KERN_DEBUG "\tkey %s\n", DBGKEY(&key));
+ printk(KERN_DEBUG "\tcreat_sqnum %llu\n",
+ (unsigned long long)le64_to_cpu(ino->creat_sqnum));
+ printk(KERN_DEBUG "\tsize %llu\n",
+ (unsigned long long)le64_to_cpu(ino->size));
+ printk(KERN_DEBUG "\tnlink %u\n",
+ le32_to_cpu(ino->nlink));
+ printk(KERN_DEBUG "\tatime %lld.%u\n",
+ (long long)le64_to_cpu(ino->atime_sec),
+ le32_to_cpu(ino->atime_nsec));
+ printk(KERN_DEBUG "\tmtime %lld.%u\n",
+ (long long)le64_to_cpu(ino->mtime_sec),
+ le32_to_cpu(ino->mtime_nsec));
+ printk(KERN_DEBUG "\tctime %lld.%u\n",
+ (long long)le64_to_cpu(ino->ctime_sec),
+ le32_to_cpu(ino->ctime_nsec));
+ printk(KERN_DEBUG "\tuid %u\n",
+ le32_to_cpu(ino->uid));
+ printk(KERN_DEBUG "\tgid %u\n",
+ le32_to_cpu(ino->gid));
+ printk(KERN_DEBUG "\tmode %u\n",
+ le32_to_cpu(ino->mode));
+ printk(KERN_DEBUG "\tflags %#x\n",
+ le32_to_cpu(ino->flags));
+ printk(KERN_DEBUG "\txattr_cnt %u\n",
+ le32_to_cpu(ino->xattr_cnt));
+ printk(KERN_DEBUG "\txattr_size %llu\n",
+ (unsigned long long)le64_to_cpu(ino->xattr_size));
+ printk(KERN_DEBUG "\txattr_names %u\n",
+ le32_to_cpu(ino->xattr_names));
+ printk(KERN_DEBUG "\tcompr_type %#x\n",
+ (int)le16_to_cpu(ino->compr_type));
+ printk(KERN_DEBUG "\tdata len %u\n",
+ le32_to_cpu(ino->data_len));
+ break;
+ }
+ case UBIFS_DENT_NODE:
+ case UBIFS_XENT_NODE:
+ {
+ const struct ubifs_dent_node *dent = node;
+ int nlen = le16_to_cpu(dent->nlen);
+
+ key_read(c, &dent->key, &key);
+ printk(KERN_DEBUG "\tkey %s\n", DBGKEY(&key));
+ printk(KERN_DEBUG "\tinum %llu\n",
+ (unsigned long long)le64_to_cpu(dent->inum));
+ printk(KERN_DEBUG "\ttype %d\n", (int)dent->type);
+ printk(KERN_DEBUG "\tnlen %d\n", nlen);
+ printk(KERN_DEBUG "\tname ");
+
+ if (nlen > UBIFS_MAX_NLEN)
+ printk(KERN_DEBUG "(bad name length, not printing, "
+ "bad or corrupted node)");
+ else {
+ for (i = 0; i < nlen && dent->name[i]; i++)
+ printk("%c", dent->name[i]);
+ }
+ printk("\n");
+
+ break;
+ }
+ case UBIFS_DATA_NODE:
+ {
+ const struct ubifs_data_node *dn = node;
+ int dlen = le32_to_cpu(ch->len) - UBIFS_DATA_NODE_SZ;
+
+ key_read(c, &dn->key, &key);
+ printk(KERN_DEBUG "\tkey %s\n", DBGKEY(&key));
+ printk(KERN_DEBUG "\tsize %u\n",
+ le32_to_cpu(dn->size));
+ printk(KERN_DEBUG "\tcompr_typ %d\n",
+ (int)le16_to_cpu(dn->compr_type));
+ printk(KERN_DEBUG "\tdata size %d\n",
+ dlen);
+ printk(KERN_DEBUG "\tdata:\n");
+ print_hex_dump(KERN_DEBUG, "\t", DUMP_PREFIX_OFFSET, 32, 1,
+ (void *)&dn->data, dlen, 0);
+ break;
+ }
+ case UBIFS_TRUN_NODE:
+ {
+ const struct ubifs_trun_node *trun = node;
+
+ printk(KERN_DEBUG "\tinum %u\n",
+ le32_to_cpu(trun->inum));
+ printk(KERN_DEBUG "\told_size %llu\n",
+ (unsigned long long)le64_to_cpu(trun->old_size));
+ printk(KERN_DEBUG "\tnew_size %llu\n",
+ (unsigned long long)le64_to_cpu(trun->new_size));
+ break;
+ }
+ case UBIFS_IDX_NODE:
+ {
+ const struct ubifs_idx_node *idx = node;
+
+ n = le16_to_cpu(idx->child_cnt);
+ printk(KERN_DEBUG "\tchild_cnt %d\n", n);
+ printk(KERN_DEBUG "\tlevel %d\n",
+ (int)le16_to_cpu(idx->level));
+ printk(KERN_DEBUG "\tBranches:\n");
+
+ for (i = 0; i < n && i < c->fanout - 1; i++) {
+ const struct ubifs_branch *br;
+
+ br = ubifs_idx_branch(c, idx, i);
+ key_read(c, &br->key, &key);
+ printk(KERN_DEBUG "\t%d: LEB %d:%d len %d key %s\n",
+ i, le32_to_cpu(br->lnum), le32_to_cpu(br->offs),
+ le32_to_cpu(br->len), DBGKEY(&key));
+ }
+ break;
+ }
+ case UBIFS_CS_NODE:
+ break;
+ case UBIFS_ORPH_NODE:
+ {
+ const struct ubifs_orph_node *orph = node;
+
+ printk(KERN_DEBUG "\tcommit number %llu\n",
+ (unsigned long long)
+ le64_to_cpu(orph->cmt_no) & LLONG_MAX);
+ printk(KERN_DEBUG "\tlast node flag %llu\n",
+ (unsigned long long)(le64_to_cpu(orph->cmt_no)) >> 63);
+ n = (le32_to_cpu(ch->len) - UBIFS_ORPH_NODE_SZ) >> 3;
+ printk(KERN_DEBUG "\t%d orphan inode numbers:\n", n);
+ for (i = 0; i < n; i++)
+ printk(KERN_DEBUG "\t ino %llu\n",
+ le64_to_cpu(orph->inos[i]));
+ break;
+ }
+ default:
+ printk(KERN_DEBUG "node type %d was not recognized\n",
+ (int)ch->node_type);
+ }
+ spin_unlock(&dbg_lock);
+}
+
+void dbg_dump_budget_req(const struct ubifs_budget_req *req)
+{
+ spin_lock(&dbg_lock);
+ printk(KERN_DEBUG "Budgeting request: new_ino %d, dirtied_ino %d\n",
+ req->new_ino, req->dirtied_ino);
+ printk(KERN_DEBUG "\tnew_ino_d %d, dirtied_ino_d %d\n",
+ req->new_ino_d, req->dirtied_ino_d);
+ printk(KERN_DEBUG "\tnew_page %d, dirtied_page %d\n",
+ req->new_page, req->dirtied_page);
+ printk(KERN_DEBUG "\tnew_dent %d, mod_dent %d\n",
+ req->new_dent, req->mod_dent);
+ printk(KERN_DEBUG "\tidx_growth %d\n", req->idx_growth);
+ printk(KERN_DEBUG "\tdata_growth %d dd_growth %d\n",
+ req->data_growth, req->dd_growth);
+ spin_unlock(&dbg_lock);
+}
+
+void dbg_dump_lstats(const struct ubifs_lp_stats *lst)
+{
+ spin_lock(&dbg_lock);
+ printk(KERN_DEBUG "Lprops statistics: empty_lebs %d, idx_lebs %d\n",
+ lst->empty_lebs, lst->idx_lebs);
+ printk(KERN_DEBUG "\ttaken_empty_lebs %d, total_free %lld, "
+ "total_dirty %lld\n", lst->taken_empty_lebs, lst->total_free,
+ lst->total_dirty);
+ printk(KERN_DEBUG "\ttotal_used %lld, total_dark %lld, "
+ "total_dead %lld\n", lst->total_used, lst->total_dark,
+ lst->total_dead);
+ spin_unlock(&dbg_lock);
+}
+
+void dbg_dump_budg(struct ubifs_info *c)
+{
+ int i;
+ struct rb_node *rb;
+ struct ubifs_bud *bud;
+ struct ubifs_gced_idx_leb *idx_gc;
+
+ spin_lock(&dbg_lock);
+ printk(KERN_DEBUG "Budgeting info: budg_data_growth %lld, "
+ "budg_dd_growth %lld, budg_idx_growth %lld\n",
+ c->budg_data_growth, c->budg_dd_growth, c->budg_idx_growth);
+ printk(KERN_DEBUG "\tdata budget sum %lld, total budget sum %lld, "
+ "freeable_cnt %d\n", c->budg_data_growth + c->budg_dd_growth,
+ c->budg_data_growth + c->budg_dd_growth + c->budg_idx_growth,
+ c->freeable_cnt);
+ printk(KERN_DEBUG "\tmin_idx_lebs %d, old_idx_sz %lld, "
+ "calc_idx_sz %lld, idx_gc_cnt %d\n", c->min_idx_lebs,
+ c->old_idx_sz, c->calc_idx_sz, c->idx_gc_cnt);
+ printk(KERN_DEBUG "\tdirty_pg_cnt %ld, dirty_ino_cnt %ld, "
+ "dirty_zn_cnt %ld, clean_zn_cnt %ld\n",
+ atomic_long_read(&c->dirty_pg_cnt),
+ atomic_long_read(&c->dirty_ino_cnt),
+ atomic_long_read(&c->dirty_zn_cnt),
+ atomic_long_read(&c->clean_zn_cnt));
+ printk(KERN_DEBUG "\tdark_wm %d, dead_wm %d, max_idx_node_sz %d\n",
+ c->dark_wm, c->dead_wm, c->max_idx_node_sz);
+ printk(KERN_DEBUG "\tgc_lnum %d, ihead_lnum %d\n",
+ c->gc_lnum, c->ihead_lnum);
+ for (i = 0; i < c->jhead_cnt; i++)
+ printk(KERN_DEBUG "\tjhead %d\t LEB %d\n",
+ c->jheads[i].wbuf.jhead, c->jheads[i].wbuf.lnum);
+ for (rb = rb_first(&c->buds); rb; rb = rb_next(rb)) {
+ bud = rb_entry(rb, struct ubifs_bud, rb);
+ printk(KERN_DEBUG "\tbud LEB %d\n", bud->lnum);
+ }
+ list_for_each_entry(bud, &c->old_buds, list)
+ printk(KERN_DEBUG "\told bud LEB %d\n", bud->lnum);
+ list_for_each_entry(idx_gc, &c->idx_gc, list)
+ printk(KERN_DEBUG "\tGC'ed idx LEB %d unmap %d\n",
+ idx_gc->lnum, idx_gc->unmap);
+ printk(KERN_DEBUG "\tcommit state %d\n", c->cmt_state);
+ spin_unlock(&dbg_lock);
+}
+
+void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp)
+{
+ printk(KERN_DEBUG "LEB %d lprops: free %d, dirty %d (used %d), "
+ "flags %#x\n", lp->lnum, lp->free, lp->dirty,
+ c->leb_size - lp->free - lp->dirty, lp->flags);
+}
+
+void dbg_dump_lprops(struct ubifs_info *c)
+{
+ int lnum, err;
+ struct ubifs_lprops lp;
+ struct ubifs_lp_stats lst;
+
+ printk(KERN_DEBUG "Dumping LEB properties\n");
+ ubifs_get_lp_stats(c, &lst);
+ dbg_dump_lstats(&lst);
+
+ for (lnum = c->main_first; lnum < c->leb_cnt; lnum++) {
+ err = ubifs_read_one_lp(c, lnum, &lp);
+ if (err)
+ ubifs_err("cannot read lprops for LEB %d", lnum);
+
+ dbg_dump_lprop(c, &lp);
+ }
+}
+
+void dbg_dump_leb(const struct ubifs_info *c, int lnum)
+{
+ struct ubifs_scan_leb *sleb;
+ struct ubifs_scan_node *snod;
+
+ if (dbg_failure_mode)
+ return;
+
+ printk(KERN_DEBUG "Dumping LEB %d\n", lnum);
+
+ sleb = ubifs_scan(c, lnum, 0, c->dbg_buf);
+ if (IS_ERR(sleb)) {
+ ubifs_err("scan error %d", (int)PTR_ERR(sleb));
+ return;
+ }
+
+ printk(KERN_DEBUG "LEB %d has %d nodes ending at %d\n", lnum,
+ sleb->nodes_cnt, sleb->endpt);
+
+ list_for_each_entry(snod, &sleb->nodes, list) {
+ cond_resched();
+ printk(KERN_DEBUG "Dumping node at LEB %d:%d len %d\n", lnum,
+ snod->offs, snod->len);
+ dbg_dump_node(c, snod->node);
+ }
+
+ ubifs_scan_destroy(sleb);
+ return;
+}
+
+void dbg_dump_znode(const struct ubifs_info *c,
+ const struct ubifs_znode *znode)
+{
+ int n;
+ const struct ubifs_zbranch *zbr;
+
+ spin_lock(&dbg_lock);
+ if (znode->parent)
+ zbr = &znode->parent->zbranch[znode->iip];
+ else
+ zbr = &c->zroot;
+
+ printk(KERN_DEBUG "znode %p, LEB %d:%d len %d parent %p iip %d level %d"
+ " child_cnt %d flags %lx\n", znode, zbr->lnum, zbr->offs,
+ zbr->len, znode->parent, znode->iip, znode->level,
+ znode->child_cnt, znode->flags);
+
+ if (znode->child_cnt <= 0 || znode->child_cnt > c->fanout) {
+ spin_unlock(&dbg_lock);
+ return;
+ }
+
+ printk(KERN_DEBUG "zbranches:\n");
+ for (n = 0; n < znode->child_cnt; n++) {
+ zbr = &znode->zbranch[n];
+ if (znode->level > 0)
+ printk(KERN_DEBUG "\t%d: znode %p LEB %d:%d len %d key "
+ "%s\n", n, zbr->znode, zbr->lnum,
+ zbr->offs, zbr->len,
+ DBGKEY(&zbr->key));
+ else
+ printk(KERN_DEBUG "\t%d: LNC %p LEB %d:%d len %d key "
+ "%s\n", n, zbr->znode, zbr->lnum,
+ zbr->offs, zbr->len,
+ DBGKEY(&zbr->key));
+ }
+ spin_unlock(&dbg_lock);
+}
+
+void dbg_dump_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat)
+{
+ int i;
+
+ printk(KERN_DEBUG "Dumping heap cat %d (%d elements)\n",
+ cat, heap->cnt);
+ for (i = 0; i < heap->cnt; i++) {
+ struct ubifs_lprops *lprops = heap->arr[i];
+
+ printk(KERN_DEBUG "\t%d. LEB %d hpos %d free %d dirty %d "
+ "flags %d\n", i, lprops->lnum, lprops->hpos,
+ lprops->free, lprops->dirty, lprops->flags);
+ }
+}
+
+void dbg_dump_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode,
+ struct ubifs_nnode *parent, int iip)
+{
+ int i;
+
+ printk(KERN_DEBUG "Dumping pnode:\n");
+ printk(KERN_DEBUG "\taddress %zx parent %zx cnext %zx\n",
+ (size_t)pnode, (size_t)parent, (size_t)pnode->cnext);
+ printk(KERN_DEBUG "\tflags %lu iip %d level %d num %d\n",
+ pnode->flags, iip, pnode->level, pnode->num);
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ struct ubifs_lprops *lp = &pnode->lprops[i];
+
+ printk(KERN_DEBUG "\t%d: free %d dirty %d flags %d lnum %d\n",
+ i, lp->free, lp->dirty, lp->flags, lp->lnum);
+ }
+}
+
+void dbg_dump_tnc(struct ubifs_info *c)
+{
+ struct ubifs_znode *znode;
+ int level;
+
+ printk(KERN_DEBUG "\n");
+ printk(KERN_DEBUG "Dumping the TNC tree\n");
+ znode = ubifs_tnc_levelorder_next(c->zroot.znode, NULL);
+ level = znode->level;
+ printk(KERN_DEBUG "== Level %d ==\n", level);
+ while (znode) {
+ if (level != znode->level) {
+ level = znode->level;
+ printk(KERN_DEBUG "== Level %d ==\n", level);
+ }
+ dbg_dump_znode(c, znode);
+ znode = ubifs_tnc_levelorder_next(c->zroot.znode, znode);
+ }
+
+ printk(KERN_DEBUG "\n");
+}
+
+static int dump_znode(struct ubifs_info *c, struct ubifs_znode *znode,
+ void *priv)
+{
+ dbg_dump_znode(c, znode);
+ return 0;
+}
+
+/**
+ * dbg_dump_index - dump the on-flash index.
+ * @c: UBIFS file-system description object
+ *
+ * This function dumps whole UBIFS indexing B-tree, unlike 'dbg_dump_tnc()'
+ * which dumps only in-memory znodes and does not read znodes which from flash.
+ */
+void dbg_dump_index(struct ubifs_info *c)
+{
+ dbg_walk_index(c, NULL, dump_znode, NULL);
+}
+
+/*
+ * dbg_check_dir - check directory inode size and link count.
+ * @c: UBIFS file-system description object
+ * @dir: the directory to calculate size for
+ * @size: the result is returned here
+ *
+ * This function makes sure that directory size and link count are correct.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ *
+ * Note, it is good idea to make sure the @dir->i_mutex is locked before
+ * calling this function.
+ */
+int dbg_check_dir_size(struct ubifs_info *c, const struct inode *dir)
+{
+ unsigned int nlink = 2;
+ union ubifs_key key;
+ struct ubifs_dent_node *dent, *pdent = NULL;
+ struct qstr nm = { .name = NULL };
+ loff_t size = UBIFS_INO_NODE_SZ;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_GEN))
+ return 0;
+
+ if (!S_ISDIR(dir->i_mode))
+ return 0;
+
+ lowest_dent_key(c, &key, dir->i_ino);
+ while (1) {
+ int err;
+
+ dent = ubifs_tnc_next_ent(c, &key, &nm);
+ if (IS_ERR(dent)) {
+ err = PTR_ERR(dent);
+ if (err == -ENOENT)
+ break;
+ return err;
+ }
+
+ nm.name = dent->name;
+ nm.len = le16_to_cpu(dent->nlen);
+ size += CALC_DENT_SIZE(nm.len);
+ if (dent->type == UBIFS_ITYPE_DIR)
+ nlink += 1;
+ kfree(pdent);
+ pdent = dent;
+ key_read(c, &dent->key, &key);
+ }
+ kfree(pdent);
+
+ if (i_size_read(dir) != size) {
+ ubifs_err("directory inode %lu has size %llu, "
+ "but calculated size is %llu", dir->i_ino,
+ (unsigned long long)i_size_read(dir),
+ (unsigned long long)size);
+ dump_stack();
+ return -EINVAL;
+ }
+ if (dir->i_nlink != nlink) {
+ ubifs_err("directory inode %lu has nlink %u, but calculated "
+ "nlink is %u", dir->i_ino, dir->i_nlink, nlink);
+ dump_stack();
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * dbg_check_key_order - make sure that colliding keys are properly ordered.
+ * @c: UBIFS file-system description object
+ * @zbr1: first zbranch
+ * @zbr1: following zbranch
+ *
+ * In UBIFS indexing B-tree colliding keys has to be sorted in binary order of
+ * names of the direntries/xentries which are referred by the keys. This
+ * function reads direntries/xentries referred by @zbr1 and @zbr2 and makes
+ * sure the name of direntry/xentry referred by @zbr1 is less than
+ * direntry/xentry referred by @zbr2. Returns zero if this is true, %1 if not,
+ * and a negative error code in case of failure.
+ */
+static int dbg_check_key_order(struct ubifs_info *c, struct ubifs_zbranch *zbr1,
+ struct ubifs_zbranch *zbr2)
+{
+ int err, nlen1, nlen2, cmp;
+ struct ubifs_dent_node *dent1, *dent2;
+ union ubifs_key key;
+
+ ubifs_assert(!keys_cmp(c, &zbr1->key, &zbr2->key));
+ dent1 = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
+ if (!dent1)
+ return -ENOMEM;
+ dent2 = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
+ if (!dent2) {
+ err = -ENOMEM;
+ goto out_free;
+ }
+
+ err = ubifs_tnc_read_node(c, zbr1, dent1);
+ if (err)
+ goto out_free;
+ err = ubifs_validate_entry(c, dent1);
+ if (err)
+ goto out_free;
+
+ err = ubifs_tnc_read_node(c, zbr2, dent2);
+ if (err)
+ goto out_free;
+ err = ubifs_validate_entry(c, dent2);
+ if (err)
+ goto out_free;
+
+ /* Make sure node keys are the same as in zbranch */
+ err = 1;
+ key_read(c, &dent1->key, &key);
+ if (keys_cmp(c, &zbr1->key, &key)) {
+ dbg_err("1st entry at %d:%d has key %s", zbr1->lnum,
+ zbr1->offs, DBGKEY(&key));
+ dbg_err("but it should have key %s according to tnc",
+ DBGKEY(&zbr1->key));
+ dbg_dump_node(c, dent1);
+ goto out_free;
+ }
+
+ key_read(c, &dent2->key, &key);
+ if (keys_cmp(c, &zbr2->key, &key)) {
+ dbg_err("2nd entry at %d:%d has key %s", zbr1->lnum,
+ zbr1->offs, DBGKEY(&key));
+ dbg_err("but it should have key %s according to tnc",
+ DBGKEY(&zbr2->key));
+ dbg_dump_node(c, dent2);
+ goto out_free;
+ }
+
+ nlen1 = le16_to_cpu(dent1->nlen);
+ nlen2 = le16_to_cpu(dent2->nlen);
+
+ cmp = memcmp(dent1->name, dent2->name, min_t(int, nlen1, nlen2));
+ if (cmp < 0 || (cmp == 0 && nlen1 < nlen2)) {
+ err = 0;
+ goto out_free;
+ }
+ if (cmp == 0 && nlen1 == nlen2)
+ dbg_err("2 xent/dent nodes with the same name");
+ else
+ dbg_err("bad order of colliding key %s",
+ DBGKEY(&key));
+
+ dbg_msg("first node at %d:%d\n", zbr1->lnum, zbr1->offs);
+ dbg_dump_node(c, dent1);
+ dbg_msg("second node at %d:%d\n", zbr2->lnum, zbr2->offs);
+ dbg_dump_node(c, dent2);
+
+out_free:
+ kfree(dent2);
+ kfree(dent1);
+ return err;
+}
+
+/**
+ * dbg_check_znode - check if znode is all right.
+ * @c: UBIFS file-system description object
+ * @zbr: zbranch which points to this znode
+ *
+ * This function makes sure that znode referred to by @zbr is all right.
+ * Returns zero if it is, and %-EINVAL if it is not.
+ */
+static int dbg_check_znode(struct ubifs_info *c, struct ubifs_zbranch *zbr)
+{
+ struct ubifs_znode *znode = zbr->znode;
+ struct ubifs_znode *zp = znode->parent;
+ int n, err, cmp;
+
+ if (znode->child_cnt <= 0 || znode->child_cnt > c->fanout) {
+ err = 1;
+ goto out;
+ }
+ if (znode->level < 0) {
+ err = 2;
+ goto out;
+ }
+ if (znode->iip < 0 || znode->iip >= c->fanout) {
+ err = 3;
+ goto out;
+ }
+
+ if (zbr->len == 0)
+ /* Only dirty zbranch may have no on-flash nodes */
+ if (!ubifs_zn_dirty(znode)) {
+ err = 4;
+ goto out;
+ }
+
+ if (ubifs_zn_dirty(znode)) {
+ /*
+ * If znode is dirty, its parent has to be dirty as well. The
+ * order of the operation is important, so we have to have
+ * memory barriers.
+ */
+ smp_mb();
+ if (zp && !ubifs_zn_dirty(zp)) {
+ /*
+ * The dirty flag is atomic and is cleared outside the
+ * TNC mutex, so znode's dirty flag may now have
+ * been cleared. The child is always cleared before the
+ * parent, so we just need to check again.
+ */
+ smp_mb();
+ if (ubifs_zn_dirty(znode)) {
+ err = 5;
+ goto out;
+ }
+ }
+ }
+
+ if (zp) {
+ const union ubifs_key *min, *max;
+
+ if (znode->level != zp->level - 1) {
+ err = 6;
+ goto out;
+ }
+
+ /* Make sure the 'parent' pointer in our znode is correct */
+ err = ubifs_search_zbranch(c, zp, &zbr->key, &n);
+ if (!err) {
+ /* This zbranch does not exist in the parent */
+ err = 7;
+ goto out;
+ }
+
+ if (znode->iip >= zp->child_cnt) {
+ err = 8;
+ goto out;
+ }
+
+ if (znode->iip != n) {
+ /* This may happen only in case of collisions */
+ if (keys_cmp(c, &zp->zbranch[n].key,
+ &zp->zbranch[znode->iip].key)) {
+ err = 9;
+ goto out;
+ }
+ n = znode->iip;
+ }
+
+ /*
+ * Make sure that the first key in our znode is greater than or
+ * equal to the key in the pointing zbranch.
+ */
+ min = &zbr->key;
+ cmp = keys_cmp(c, min, &znode->zbranch[0].key);
+ if (cmp == 1) {
+ err = 10;
+ goto out;
+ }
+
+ if (n + 1 < zp->child_cnt) {
+ max = &zp->zbranch[n + 1].key;
+
+ /*
+ * Make sure the last key in our znode is less or
+ * equivalent than the the key in zbranch which goes
+ * after our pointing zbranch.
+ */
+ cmp = keys_cmp(c, max,
+ &znode->zbranch[znode->child_cnt - 1].key);
+ if (cmp == -1) {
+ err = 11;
+ goto out;
+ }
+ }
+ } else {
+ /* This may only be root znode */
+ if (zbr != &c->zroot) {
+ err = 12;
+ goto out;
+ }
+ }
+
+ /*
+ * Make sure that next key is greater or equivalent then the previous
+ * one.
+ */
+ for (n = 1; n < znode->child_cnt; n++) {
+ cmp = keys_cmp(c, &znode->zbranch[n - 1].key,
+ &znode->zbranch[n].key);
+ if (cmp > 0) {
+ err = 13;
+ goto out;
+ }
+ if (cmp == 0) {
+ /* This can only be keys with colliding hash */
+ if (!is_hash_key(c, &znode->zbranch[n].key)) {
+ err = 14;
+ goto out;
+ }
+
+ if (znode->level != 0 || c->replaying)
+ continue;
+
+ /*
+ * Colliding keys should follow binary order of
+ * corresponding xentry/dentry names.
+ */
+ err = dbg_check_key_order(c, &znode->zbranch[n - 1],
+ &znode->zbranch[n]);
+ if (err < 0)
+ return err;
+ if (err) {
+ err = 15;
+ goto out;
+ }
+ }
+ }
+
+ for (n = 0; n < znode->child_cnt; n++) {
+ if (!znode->zbranch[n].znode &&
+ (znode->zbranch[n].lnum == 0 ||
+ znode->zbranch[n].len == 0)) {
+ err = 16;
+ goto out;
+ }
+
+ if (znode->zbranch[n].lnum != 0 &&
+ znode->zbranch[n].len == 0) {
+ err = 17;
+ goto out;
+ }
+
+ if (znode->zbranch[n].lnum == 0 &&
+ znode->zbranch[n].len != 0) {
+ err = 18;
+ goto out;
+ }
+
+ if (znode->zbranch[n].lnum == 0 &&
+ znode->zbranch[n].offs != 0) {
+ err = 19;
+ goto out;
+ }
+
+ if (znode->level != 0 && znode->zbranch[n].znode)
+ if (znode->zbranch[n].znode->parent != znode) {
+ err = 20;
+ goto out;
+ }
+ }
+
+ return 0;
+
+out:
+ ubifs_err("failed, error %d", err);
+ ubifs_msg("dump of the znode");
+ dbg_dump_znode(c, znode);
+ if (zp) {
+ ubifs_msg("dump of the parent znode");
+ dbg_dump_znode(c, zp);
+ }
+ dump_stack();
+ return -EINVAL;
+}
+
+/**
+ * dbg_check_tnc - check TNC tree.
+ * @c: UBIFS file-system description object
+ * @extra: do extra checks that are possible at start commit
+ *
+ * This function traverses whole TNC tree and checks every znode. Returns zero
+ * if everything is all right and %-EINVAL if something is wrong with TNC.
+ */
+int dbg_check_tnc(struct ubifs_info *c, int extra)
+{
+ struct ubifs_znode *znode;
+ long clean_cnt = 0, dirty_cnt = 0;
+ int err, last;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_TNC))
+ return 0;
+
+ ubifs_assert(mutex_is_locked(&c->tnc_mutex));
+ if (!c->zroot.znode)
+ return 0;
+
+ znode = ubifs_tnc_postorder_first(c->zroot.znode);
+ while (1) {
+ struct ubifs_znode *prev;
+ struct ubifs_zbranch *zbr;
+
+ if (!znode->parent)
+ zbr = &c->zroot;
+ else
+ zbr = &znode->parent->zbranch[znode->iip];
+
+ err = dbg_check_znode(c, zbr);
+ if (err)
+ return err;
+
+ if (extra) {
+ if (ubifs_zn_dirty(znode))
+ dirty_cnt += 1;
+ else
+ clean_cnt += 1;
+ }
+
+ prev = znode;
+ znode = ubifs_tnc_postorder_next(znode);
+ if (!znode)
+ break;
+
+ /*
+ * If the last key of this znode is equivalent to the first key
+ * of the next znode (collision), then check order of the keys.
+ */
+ last = prev->child_cnt - 1;
+ if (prev->level == 0 && znode->level == 0 && !c->replaying &&
+ !keys_cmp(c, &prev->zbranch[last].key,
+ &znode->zbranch[0].key)) {
+ err = dbg_check_key_order(c, &prev->zbranch[last],
+ &znode->zbranch[0]);
+ if (err < 0)
+ return err;
+ if (err) {
+ ubifs_msg("first znode");
+ dbg_dump_znode(c, prev);
+ ubifs_msg("second znode");
+ dbg_dump_znode(c, znode);
+ return -EINVAL;
+ }
+ }
+ }
+
+ if (extra) {
+ if (clean_cnt != atomic_long_read(&c->clean_zn_cnt)) {
+ ubifs_err("incorrect clean_zn_cnt %ld, calculated %ld",
+ atomic_long_read(&c->clean_zn_cnt),
+ clean_cnt);
+ return -EINVAL;
+ }
+ if (dirty_cnt != atomic_long_read(&c->dirty_zn_cnt)) {
+ ubifs_err("incorrect dirty_zn_cnt %ld, calculated %ld",
+ atomic_long_read(&c->dirty_zn_cnt),
+ dirty_cnt);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * dbg_walk_index - walk the on-flash index.
+ * @c: UBIFS file-system description object
+ * @leaf_cb: called for each leaf node
+ * @znode_cb: called for each indexing node
+ * @priv: private date which is passed to callbacks
+ *
+ * This function walks the UBIFS index and calls the @leaf_cb for each leaf
+ * node and @znode_cb for each indexing node. Returns zero in case of success
+ * and a negative error code in case of failure.
+ *
+ * It would be better if this function removed every znode it pulled to into
+ * the TNC, so that the behavior more closely matched the non-debugging
+ * behavior.
+ */
+int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb,
+ dbg_znode_callback znode_cb, void *priv)
+{
+ int err;
+ struct ubifs_zbranch *zbr;
+ struct ubifs_znode *znode, *child;
+
+ mutex_lock(&c->tnc_mutex);
+ /* If the root indexing node is not in TNC - pull it */
+ if (!c->zroot.znode) {
+ c->zroot.znode = ubifs_load_znode(c, &c->zroot, NULL, 0);
+ if (IS_ERR(c->zroot.znode)) {
+ err = PTR_ERR(c->zroot.znode);
+ c->zroot.znode = NULL;
+ goto out_unlock;
+ }
+ }
+
+ /*
+ * We are going to traverse the indexing tree in the postorder manner.
+ * Go down and find the leftmost indexing node where we are going to
+ * start from.
+ */
+ znode = c->zroot.znode;
+ while (znode->level > 0) {
+ zbr = &znode->zbranch[0];
+ child = zbr->znode;
+ if (!child) {
+ child = ubifs_load_znode(c, zbr, znode, 0);
+ if (IS_ERR(child)) {
+ err = PTR_ERR(child);
+ goto out_unlock;
+ }
+ zbr->znode = child;
+ }
+
+ znode = child;
+ }
+
+ /* Iterate over all indexing nodes */
+ while (1) {
+ int idx;
+
+ cond_resched();
+
+ if (znode_cb) {
+ err = znode_cb(c, znode, priv);
+ if (err) {
+ ubifs_err("znode checking function returned "
+ "error %d", err);
+ dbg_dump_znode(c, znode);
+ goto out_dump;
+ }
+ }
+ if (leaf_cb && znode->level == 0) {
+ for (idx = 0; idx < znode->child_cnt; idx++) {
+ zbr = &znode->zbranch[idx];
+ err = leaf_cb(c, zbr, priv);
+ if (err) {
+ ubifs_err("leaf checking function "
+ "returned error %d, for leaf "
+ "at LEB %d:%d",
+ err, zbr->lnum, zbr->offs);
+ goto out_dump;
+ }
+ }
+ }
+
+ if (!znode->parent)
+ break;
+
+ idx = znode->iip + 1;
+ znode = znode->parent;
+ if (idx < znode->child_cnt) {
+ /* Switch to the next index in the parent */
+ zbr = &znode->zbranch[idx];
+ child = zbr->znode;
+ if (!child) {
+ child = ubifs_load_znode(c, zbr, znode, idx);
+ if (IS_ERR(child)) {
+ err = PTR_ERR(child);
+ goto out_unlock;
+ }
+ zbr->znode = child;
+ }
+ znode = child;
+ } else
+ /*
+ * This is the last child, switch to the parent and
+ * continue.
+ */
+ continue;
+
+ /* Go to the lowest leftmost znode in the new sub-tree */
+ while (znode->level > 0) {
+ zbr = &znode->zbranch[0];
+ child = zbr->znode;
+ if (!child) {
+ child = ubifs_load_znode(c, zbr, znode, 0);
+ if (IS_ERR(child)) {
+ err = PTR_ERR(child);
+ goto out_unlock;
+ }
+ zbr->znode = child;
+ }
+ znode = child;
+ }
+ }
+
+ mutex_unlock(&c->tnc_mutex);
+ return 0;
+
+out_dump:
+ if (znode->parent)
+ zbr = &znode->parent->zbranch[znode->iip];
+ else
+ zbr = &c->zroot;
+ ubifs_msg("dump of znode at LEB %d:%d", zbr->lnum, zbr->offs);
+ dbg_dump_znode(c, znode);
+out_unlock:
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * add_size - add znode size to partially calculated index size.
+ * @c: UBIFS file-system description object
+ * @znode: znode to add size for
+ * @priv: partially calculated index size
+ *
+ * This is a helper function for 'dbg_check_idx_size()' which is called for
+ * every indexing node and adds its size to the 'long long' variable pointed to
+ * by @priv.
+ */
+static int add_size(struct ubifs_info *c, struct ubifs_znode *znode, void *priv)
+{
+ long long *idx_size = priv;
+ int add;
+
+ add = ubifs_idx_node_sz(c, znode->child_cnt);
+ add = ALIGN(add, 8);
+ *idx_size += add;
+ return 0;
+}
+
+/**
+ * dbg_check_idx_size - check index size.
+ * @c: UBIFS file-system description object
+ * @idx_size: size to check
+ *
+ * This function walks the UBIFS index, calculates its size and checks that the
+ * size is equivalent to @idx_size. Returns zero in case of success and a
+ * negative error code in case of failure.
+ */
+int dbg_check_idx_size(struct ubifs_info *c, long long idx_size)
+{
+ int err;
+ long long calc = 0;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_IDX_SZ))
+ return 0;
+
+ err = dbg_walk_index(c, NULL, add_size, &calc);
+ if (err) {
+ ubifs_err("error %d while walking the index", err);
+ return err;
+ }
+
+ if (calc != idx_size) {
+ ubifs_err("index size check failed: calculated size is %lld, "
+ "should be %lld", calc, idx_size);
+ dump_stack();
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * fsck_inode - information about an inode used when checking the file-system.
+ * @rb: link in the RB-tree of inodes
+ * @inum: inode number
+ * @mode: inode type, permissions, etc
+ * @nlink: inode link count
+ * @xatt_cnt: count of extended attributes
+ * @references: how many directory/xattr entries refer this inode (calculated
+ * while walking the index)
+ * @calc_cnt: for directory inode count of child directories, for regular files
+ * count of extended attributes
+ * @size: inode size (read from on-flash inode)
+ * @xattr_sz: summary size of all extended attributes (read from on-flash
+ * inode)
+ * @calc_sz: for directories calculated directory size, for regular files
+ * calculated summary size of all extended attributes
+ */
+struct fsck_inode {
+ struct rb_node rb;
+ ino_t inum;
+ umode_t mode;
+ int nlink;
+ int xattr_cnt;
+ int references;
+ int calc_cnt;
+ long long size;
+ long long xattr_sz;
+ long long calc_sz;
+};
+
+/**
+ * fsck_data - private FS checking information.
+ * @inodes: RB-tree of all inodes (contains @struct fsck_inode objects)
+ */
+struct fsck_data {
+ struct rb_root inodes;
+};
+
+/**
+ * add_inode - add inode information to RB-tree of inodes.
+ * @c: UBIFS file-system description object
+ * @fsckd: FS checking information
+ * @ino: raw UBIFS inode to add
+ *
+ * This is a helper function for 'check_leaf()' which adds information about
+ * inode @ino to the RB-tree of inodes. Returns inode information pointer in
+ * case of success and a negative error code in case of failure.
+ */
+static struct fsck_inode *add_inode(struct ubifs_info *c,
+ struct fsck_data *fsckd,
+ struct ubifs_ino_node *ino)
+{
+ struct rb_node **p, *parent = NULL;
+ struct fsck_inode *fscki;
+ ino_t inum = key_inum_flash(c, &ino->key);
+
+ p = &fsckd->inodes.rb_node;
+ while (*p) {
+ parent = *p;
+ fscki = rb_entry(parent, struct fsck_inode, rb);
+ if (inum < fscki->inum)
+ p = &(*p)->rb_left;
+ else if (inum > fscki->inum)
+ p = &(*p)->rb_right;
+ else
+ return fscki;
+ }
+
+ fscki = kzalloc(sizeof(struct fsck_inode), GFP_NOFS);
+ if (!fscki)
+ return ERR_PTR(-ENOMEM);
+
+ fscki->inum = inum;
+ fscki->nlink = le32_to_cpu(ino->nlink);
+ fscki->size = le64_to_cpu(ino->size);
+ fscki->xattr_cnt = le32_to_cpu(ino->xattr_cnt);
+ fscki->xattr_sz = le64_to_cpu(ino->xattr_size);
+ fscki->mode = le32_to_cpu(ino->mode);
+ if (S_ISDIR(fscki->mode)) {
+ fscki->calc_sz = UBIFS_INO_NODE_SZ;
+ fscki->calc_cnt = 2;
+ }
+ rb_link_node(&fscki->rb, parent, p);
+ rb_insert_color(&fscki->rb, &fsckd->inodes);
+ return fscki;
+}
+
+/**
+ * search_inode - search inode in the RB-tree of inodes.
+ * @fsckd: FS checking information
+ * @inum: inode number to search
+ *
+ * This is a helper function for 'check_leaf()' which searches inode @inum in
+ * the RB-tree of inodes and returns an inode information pointer or %NULL if
+ * the inode was not found.
+ */
+static struct fsck_inode *search_inode(struct fsck_data *fsckd, ino_t inum)
+{
+ struct rb_node *p;
+ struct fsck_inode *fscki;
+
+ p = fsckd->inodes.rb_node;
+ while (p) {
+ fscki = rb_entry(p, struct fsck_inode, rb);
+ if (inum < fscki->inum)
+ p = p->rb_left;
+ else if (inum > fscki->inum)
+ p = p->rb_right;
+ else
+ return fscki;
+ }
+ return NULL;
+}
+
+/**
+ * read_add_inode - read inode node and add it to RB-tree of inodes.
+ * @c: UBIFS file-system description object
+ * @fsckd: FS checking information
+ * @inum: inode number to read
+ *
+ * This is a helper function for 'check_leaf()' which finds inode node @inum in
+ * the index, reads it, and adds it to the RB-tree of inodes. Returns inode
+ * information pointer in case of success and a negative error code in case of
+ * failure.
+ */
+static struct fsck_inode *read_add_inode(struct ubifs_info *c,
+ struct fsck_data *fsckd, ino_t inum)
+{
+ int n, err;
+ union ubifs_key key;
+ struct ubifs_znode *znode;
+ struct ubifs_zbranch *zbr;
+ struct ubifs_ino_node *ino;
+ struct fsck_inode *fscki;
+
+ fscki = search_inode(fsckd, inum);
+ if (fscki)
+ return fscki;
+
+ ino_key_init(c, &key, inum);
+ err = ubifs_lookup_level0(c, &key, &znode, &n);
+ if (!err) {
+ ubifs_err("inode %lu not found in index", inum);
+ return ERR_PTR(-ENOENT);
+ } else if (err < 0) {
+ ubifs_err("error %d while looking up inode %lu", err, inum);
+ return ERR_PTR(err);
+ }
+
+ zbr = &znode->zbranch[n];
+ if (zbr->len < UBIFS_INO_NODE_SZ) {
+ ubifs_err("bad node %lu node length %d", inum, zbr->len);
+ return ERR_PTR(-EINVAL);
+ }
+
+ ino = kmalloc(zbr->len, GFP_NOFS);
+ if (!ino)
+ return ERR_PTR(-ENOMEM);
+
+ err = ubifs_tnc_read_node(c, zbr, ino);
+ if (err) {
+ ubifs_err("cannot read inode node at LEB %d:%d, error %d",
+ zbr->lnum, zbr->offs, err);
+ kfree(ino);
+ return ERR_PTR(err);
+ }
+
+ fscki = add_inode(c, fsckd, ino);
+ kfree(ino);
+ if (IS_ERR(fscki)) {
+ ubifs_err("error %ld while adding inode %lu node",
+ PTR_ERR(fscki), inum);
+ return fscki;
+ }
+
+ return fscki;
+}
+
+/**
+ * check_leaf - check leaf node.
+ * @c: UBIFS file-system description object
+ * @zbr: zbranch of the leaf node to check
+ * @priv: FS checking information
+ *
+ * This is a helper function for 'dbg_check_filesystem()' which is called for
+ * every single leaf node while walking the indexing tree. It checks that the
+ * leaf node referred from the indexing tree exists, has correct CRC, and does
+ * some other basic validation. This function is also responsible for building
+ * an RB-tree of inodes - it adds all inodes into the RB-tree. It also
+ * calculates reference count, size, etc for each inode in order to later
+ * compare them to the information stored inside the inodes and detect possible
+ * inconsistencies. Returns zero in case of success and a negative error code
+ * in case of failure.
+ */
+static int check_leaf(struct ubifs_info *c, struct ubifs_zbranch *zbr,
+ void *priv)
+{
+ ino_t inum;
+ void *node;
+ int err, type = key_type(c, &zbr->key);
+ struct fsck_inode *fscki;
+
+ if (zbr->len < UBIFS_CH_SZ) {
+ ubifs_err("bad leaf length %d (LEB %d:%d)",
+ zbr->len, zbr->lnum, zbr->offs);
+ return -EINVAL;
+ }
+
+ node = kmalloc(zbr->len, GFP_NOFS);
+ if (!node)
+ return -ENOMEM;
+
+ err = ubifs_tnc_read_node(c, zbr, node);
+ if (err) {
+ ubifs_err("cannot read leaf node at LEB %d:%d, error %d",
+ zbr->lnum, zbr->offs, err);
+ goto out_free;
+ }
+
+ /* If this is an inode node, add it to RB-tree of inodes */
+ if (type == UBIFS_INO_KEY) {
+ fscki = add_inode(c, priv, node);
+ if (IS_ERR(fscki)) {
+ err = PTR_ERR(fscki);
+ ubifs_err("error %d while adding inode node", err);
+ goto out_dump;
+ }
+ goto out;
+ }
+
+ if (type != UBIFS_DENT_KEY && type != UBIFS_XENT_KEY &&
+ type != UBIFS_DATA_KEY) {
+ ubifs_err("unexpected node type %d at LEB %d:%d",
+ type, zbr->lnum, zbr->offs);
+ err = -EINVAL;
+ goto out_free;
+ }
+
+ if (type == UBIFS_DATA_KEY) {
+ long long blk_offs;
+ struct ubifs_data_node *dn = node;
+
+ /*
+ * Search the inode node this data node belongs to and insert
+ * it to the RB-tree of inodes.
+ */
+ inum = key_inum_flash(c, &dn->key);
+ fscki = read_add_inode(c, priv, inum);
+ if (IS_ERR(fscki)) {
+ err = PTR_ERR(fscki);
+ ubifs_err("error %d while processing data node and "
+ "trying to find inode node %lu", err, inum);
+ goto out_dump;
+ }
+
+ /* Make sure the data node is within inode size */
+ blk_offs = (key_block_flash(c, &dn->key) << UBIFS_BLOCK_SHIFT);
+ blk_offs += le32_to_cpu(dn->size);
+ if (blk_offs > fscki->size) {
+ ubifs_err("data node at LEB %d:%d is not within inode "
+ "size %lld", zbr->lnum, zbr->offs, fscki->size);
+ err = -EINVAL;
+ goto out_dump;
+ }
+ } else {
+ int nlen;
+ struct ubifs_dent_node *dent = node;
+ struct fsck_inode *fscki1;
+
+ err = ubifs_validate_entry(c, dent);
+ if (err)
+ goto out_dump;
+
+ /*
+ * Search the inode node this entry refers to and the parent
+ * inode node and insert them to the RB-tree of inodes.
+ */
+ inum = le64_to_cpu(dent->inum);
+ fscki = read_add_inode(c, priv, inum);
+ if (IS_ERR(fscki)) {
+ err = PTR_ERR(fscki);
+ ubifs_err("error %d while processing entry node and "
+ "trying to find inode node %lu", err, inum);
+ goto out_dump;
+ }
+
+ /* Count how many direntries or xentries refers this inode */
+ fscki->references += 1;
+
+ inum = key_inum_flash(c, &dent->key);
+ fscki1 = read_add_inode(c, priv, inum);
+ if (IS_ERR(fscki1)) {
+ err = PTR_ERR(fscki);
+ ubifs_err("error %d while processing entry node and "
+ "trying to find parent inode node %lu",
+ err, inum);
+ goto out_dump;
+ }
+
+ nlen = le16_to_cpu(dent->nlen);
+ if (type == UBIFS_XENT_KEY) {
+ fscki1->calc_cnt += 1;
+ fscki1->calc_sz += CALC_DENT_SIZE(nlen);
+ fscki1->calc_sz += CALC_XATTR_BYTES(fscki->size);
+ } else {
+ fscki1->calc_sz += CALC_DENT_SIZE(nlen);
+ if (dent->type == UBIFS_ITYPE_DIR)
+ fscki1->calc_cnt += 1;
+ }
+ }
+
+out:
+ kfree(node);
+ return 0;
+
+out_dump:
+ ubifs_msg("dump of node at LEB %d:%d", zbr->lnum, zbr->offs);
+ dbg_dump_node(c, node);
+out_free:
+ kfree(node);
+ return err;
+}
+
+/**
+ * free_inodes - free RB-tree of inodes.
+ * @fsckd: FS checking information
+ */
+static void free_inodes(struct fsck_data *fsckd)
+{
+ struct rb_node *this = fsckd->inodes.rb_node;
+ struct fsck_inode *fscki;
+
+ while (this) {
+ if (this->rb_left)
+ this = this->rb_left;
+ else if (this->rb_right)
+ this = this->rb_right;
+ else {
+ fscki = rb_entry(this, struct fsck_inode, rb);
+ this = rb_parent(this);
+ if (this) {
+ if (this->rb_left == &fscki->rb)
+ this->rb_left = NULL;
+ else
+ this->rb_right = NULL;
+ }
+ kfree(fscki);
+ }
+ }
+}
+
+/**
+ * check_inodes - checks all inodes.
+ * @c: UBIFS file-system description object
+ * @fsckd: FS checking information
+ *
+ * This is a helper function for 'dbg_check_filesystem()' which walks the
+ * RB-tree of inodes after the index scan has been finished, and checks that
+ * inode nlink, size, etc are correct. Returns zero if inodes are fine,
+ * %-EINVAL if not, and a negative error code in case of failure.
+ */
+static int check_inodes(struct ubifs_info *c, struct fsck_data *fsckd)
+{
+ int n, err;
+ union ubifs_key key;
+ struct ubifs_znode *znode;
+ struct ubifs_zbranch *zbr;
+ struct ubifs_ino_node *ino;
+ struct fsck_inode *fscki;
+ struct rb_node *this = rb_first(&fsckd->inodes);
+
+ while (this) {
+ fscki = rb_entry(this, struct fsck_inode, rb);
+ this = rb_next(this);
+
+ if (S_ISDIR(fscki->mode)) {
+ /*
+ * Directories have to have exactly one reference (they
+ * cannot have hardlinks), although root inode is an
+ * exception.
+ */
+ if (fscki->inum != UBIFS_ROOT_INO &&
+ fscki->references != 1) {
+ ubifs_err("directory inode %lu has %d "
+ "direntries which refer it, but "
+ "should be 1", fscki->inum,
+ fscki->references);
+ goto out_dump;
+ }
+ if (fscki->inum == UBIFS_ROOT_INO &&
+ fscki->references != 0) {
+ ubifs_err("root inode %lu has non-zero (%d) "
+ "direntries which refer it",
+ fscki->inum, fscki->references);
+ goto out_dump;
+ }
+ if (fscki->calc_sz != fscki->size) {
+ ubifs_err("directory inode %lu size is %lld, "
+ "but calculated size is %lld",
+ fscki->inum, fscki->size,
+ fscki->calc_sz);
+ goto out_dump;
+ }
+ if (fscki->calc_cnt != fscki->nlink) {
+ ubifs_err("directory inode %lu nlink is %d, "
+ "but calculated nlink is %d",
+ fscki->inum, fscki->nlink,
+ fscki->calc_cnt);
+ goto out_dump;
+ }
+ } else {
+ if (fscki->references != fscki->nlink) {
+ ubifs_err("inode %lu nlink is %d, but "
+ "calculated nlink is %d", fscki->inum,
+ fscki->nlink, fscki->references);
+ goto out_dump;
+ }
+ if (fscki->xattr_sz != fscki->calc_sz) {
+ ubifs_err("inode %lu has xattr size %lld, but "
+ "calculated size is %lld",
+ fscki->inum, fscki->xattr_sz,
+ fscki->calc_sz);
+ goto out_dump;
+ }
+ if (fscki->xattr_cnt != fscki->calc_cnt) {
+ ubifs_err("inode %lu has %d xattrs, but "
+ "calculated count is %d", fscki->inum,
+ fscki->xattr_cnt, fscki->calc_cnt);
+ goto out_dump;
+ }
+ }
+ }
+
+ return 0;
+
+out_dump:
+ /* Read the bad inode and dump it */
+ ino_key_init(c, &key, fscki->inum);
+ err = ubifs_lookup_level0(c, &key, &znode, &n);
+ if (!err) {
+ ubifs_err("inode %lu not found in index", fscki->inum);
+ return -ENOENT;
+ } else if (err < 0) {
+ ubifs_err("error %d while looking up inode %lu",
+ err, fscki->inum);
+ return err;
+ }
+
+ zbr = &znode->zbranch[n];
+ ino = kmalloc(zbr->len, GFP_NOFS);
+ if (!ino)
+ return -ENOMEM;
+
+ err = ubifs_tnc_read_node(c, zbr, ino);
+ if (err) {
+ ubifs_err("cannot read inode node at LEB %d:%d, error %d",
+ zbr->lnum, zbr->offs, err);
+ kfree(ino);
+ return err;
+ }
+
+ ubifs_msg("dump of the inode %lu sitting in LEB %d:%d",
+ fscki->inum, zbr->lnum, zbr->offs);
+ dbg_dump_node(c, ino);
+ kfree(ino);
+ return -EINVAL;
+}
+
+/**
+ * dbg_check_filesystem - check the file-system.
+ * @c: UBIFS file-system description object
+ *
+ * This function checks the file system, namely:
+ * o makes sure that all leaf nodes exist and their CRCs are correct;
+ * o makes sure inode nlink, size, xattr size/count are correct (for all
+ * inodes).
+ *
+ * The function reads whole indexing tree and all nodes, so it is pretty
+ * heavy-weight. Returns zero if the file-system is consistent, %-EINVAL if
+ * not, and a negative error code in case of failure.
+ */
+int dbg_check_filesystem(struct ubifs_info *c)
+{
+ int err;
+ struct fsck_data fsckd;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_FS))
+ return 0;
+
+ fsckd.inodes = RB_ROOT;
+ err = dbg_walk_index(c, check_leaf, NULL, &fsckd);
+ if (err)
+ goto out_free;
+
+ err = check_inodes(c, &fsckd);
+ if (err)
+ goto out_free;
+
+ free_inodes(&fsckd);
+ return 0;
+
+out_free:
+ ubifs_err("file-system check failed with error %d", err);
+ dump_stack();
+ free_inodes(&fsckd);
+ return err;
+}
+
+static int invocation_cnt;
+
+int dbg_force_in_the_gaps(void)
+{
+ if (!dbg_force_in_the_gaps_enabled)
+ return 0;
+ /* Force in-the-gaps every 8th commit */
+ return !((invocation_cnt++) & 0x7);
+}
+
+/* Failure mode for recovery testing */
+
+#define chance(n, d) (simple_rand() <= (n) * 32768LL / (d))
+
+struct failure_mode_info {
+ struct list_head list;
+ struct ubifs_info *c;
+};
+
+static LIST_HEAD(fmi_list);
+static DEFINE_SPINLOCK(fmi_lock);
+
+static unsigned int next;
+
+static int simple_rand(void)
+{
+ if (next == 0)
+ next = current->pid;
+ next = next * 1103515245 + 12345;
+ return (next >> 16) & 32767;
+}
+
+void dbg_failure_mode_registration(struct ubifs_info *c)
+{
+ struct failure_mode_info *fmi;
+
+ fmi = kmalloc(sizeof(struct failure_mode_info), GFP_NOFS);
+ if (!fmi) {
+ dbg_err("Failed to register failure mode - no memory");
+ return;
+ }
+ fmi->c = c;
+ spin_lock(&fmi_lock);
+ list_add_tail(&fmi->list, &fmi_list);
+ spin_unlock(&fmi_lock);
+}
+
+void dbg_failure_mode_deregistration(struct ubifs_info *c)
+{
+ struct failure_mode_info *fmi, *tmp;
+
+ spin_lock(&fmi_lock);
+ list_for_each_entry_safe(fmi, tmp, &fmi_list, list)
+ if (fmi->c == c) {
+ list_del(&fmi->list);
+ kfree(fmi);
+ }
+ spin_unlock(&fmi_lock);
+}
+
+static struct ubifs_info *dbg_find_info(struct ubi_volume_desc *desc)
+{
+ struct failure_mode_info *fmi;
+
+ spin_lock(&fmi_lock);
+ list_for_each_entry(fmi, &fmi_list, list)
+ if (fmi->c->ubi == desc) {
+ struct ubifs_info *c = fmi->c;
+
+ spin_unlock(&fmi_lock);
+ return c;
+ }
+ spin_unlock(&fmi_lock);
+ return NULL;
+}
+
+static int in_failure_mode(struct ubi_volume_desc *desc)
+{
+ struct ubifs_info *c = dbg_find_info(desc);
+
+ if (c)
+ return c->failure_mode;
+ return 0;
+}
+
+static int do_fail(struct ubi_volume_desc *desc, int lnum, int write)
+{
+ struct ubifs_info *c = dbg_find_info(desc);
+
+ if (!c || !dbg_failure_mode)
+ return 0;
+ if (c->failure_mode)
+ return 1;
+ if (!c->fail_cnt) {
+ /* First call - decide delay to failure */
+ if (chance(1, 2)) {
+ unsigned int delay = 1 << (simple_rand() >> 11);
+
+ if (chance(1, 2)) {
+ c->fail_delay = 1;
+ c->fail_timeout = jiffies +
+ msecs_to_jiffies(delay);
+ dbg_rcvry("failing after %ums", delay);
+ } else {
+ c->fail_delay = 2;
+ c->fail_cnt_max = delay;
+ dbg_rcvry("failing after %u calls", delay);
+ }
+ }
+ c->fail_cnt += 1;
+ }
+ /* Determine if failure delay has expired */
+ if (c->fail_delay == 1) {
+ if (time_before(jiffies, c->fail_timeout))
+ return 0;
+ } else if (c->fail_delay == 2)
+ if (c->fail_cnt++ < c->fail_cnt_max)
+ return 0;
+ if (lnum == UBIFS_SB_LNUM) {
+ if (write) {
+ if (chance(1, 2))
+ return 0;
+ } else if (chance(19, 20))
+ return 0;
+ dbg_rcvry("failing in super block LEB %d", lnum);
+ } else if (lnum == UBIFS_MST_LNUM || lnum == UBIFS_MST_LNUM + 1) {
+ if (chance(19, 20))
+ return 0;
+ dbg_rcvry("failing in master LEB %d", lnum);
+ } else if (lnum >= UBIFS_LOG_LNUM && lnum <= c->log_last) {
+ if (write) {
+ if (chance(99, 100))
+ return 0;
+ } else if (chance(399, 400))
+ return 0;
+ dbg_rcvry("failing in log LEB %d", lnum);
+ } else if (lnum >= c->lpt_first && lnum <= c->lpt_last) {
+ if (write) {
+ if (chance(7, 8))
+ return 0;
+ } else if (chance(19, 20))
+ return 0;
+ dbg_rcvry("failing in LPT LEB %d", lnum);
+ } else if (lnum >= c->orph_first && lnum <= c->orph_last) {
+ if (write) {
+ if (chance(1, 2))
+ return 0;
+ } else if (chance(9, 10))
+ return 0;
+ dbg_rcvry("failing in orphan LEB %d", lnum);
+ } else if (lnum == c->ihead_lnum) {
+ if (chance(99, 100))
+ return 0;
+ dbg_rcvry("failing in index head LEB %d", lnum);
+ } else if (c->jheads && lnum == c->jheads[GCHD].wbuf.lnum) {
+ if (chance(9, 10))
+ return 0;
+ dbg_rcvry("failing in GC head LEB %d", lnum);
+ } else if (write && !RB_EMPTY_ROOT(&c->buds) &&
+ !ubifs_search_bud(c, lnum)) {
+ if (chance(19, 20))
+ return 0;
+ dbg_rcvry("failing in non-bud LEB %d", lnum);
+ } else if (c->cmt_state == COMMIT_RUNNING_BACKGROUND ||
+ c->cmt_state == COMMIT_RUNNING_REQUIRED) {
+ if (chance(999, 1000))
+ return 0;
+ dbg_rcvry("failing in bud LEB %d commit running", lnum);
+ } else {
+ if (chance(9999, 10000))
+ return 0;
+ dbg_rcvry("failing in bud LEB %d commit not running", lnum);
+ }
+ ubifs_err("*** SETTING FAILURE MODE ON (LEB %d) ***", lnum);
+ c->failure_mode = 1;
+ dump_stack();
+ return 1;
+}
+
+static void cut_data(const void *buf, int len)
+{
+ int flen, i;
+ unsigned char *p = (void *)buf;
+
+ flen = (len * (long long)simple_rand()) >> 15;
+ for (i = flen; i < len; i++)
+ p[i] = 0xff;
+}
+
+int dbg_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
+ int len, int check)
+{
+ if (in_failure_mode(desc))
+ return -EIO;
+ return ubi_leb_read(desc, lnum, buf, offset, len, check);
+}
+
+int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
+ int offset, int len, int dtype)
+{
+ int err;
+
+ if (in_failure_mode(desc))
+ return -EIO;
+ if (do_fail(desc, lnum, 1))
+ cut_data(buf, len);
+ err = ubi_leb_write(desc, lnum, buf, offset, len, dtype);
+ if (err)
+ return err;
+ if (in_failure_mode(desc))
+ return -EIO;
+ return 0;
+}
+
+int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
+ int len, int dtype)
+{
+ int err;
+
+ if (do_fail(desc, lnum, 1))
+ return -EIO;
+ err = ubi_leb_change(desc, lnum, buf, len, dtype);
+ if (err)
+ return err;
+ if (do_fail(desc, lnum, 1))
+ return -EIO;
+ return 0;
+}
+
+int dbg_leb_erase(struct ubi_volume_desc *desc, int lnum)
+{
+ int err;
+
+ if (do_fail(desc, lnum, 0))
+ return -EIO;
+ err = ubi_leb_erase(desc, lnum);
+ if (err)
+ return err;
+ if (do_fail(desc, lnum, 0))
+ return -EIO;
+ return 0;
+}
+
+int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum)
+{
+ int err;
+
+ if (do_fail(desc, lnum, 0))
+ return -EIO;
+ err = ubi_leb_unmap(desc, lnum);
+ if (err)
+ return err;
+ if (do_fail(desc, lnum, 0))
+ return -EIO;
+ return 0;
+}
+
+int dbg_is_mapped(struct ubi_volume_desc *desc, int lnum)
+{
+ if (in_failure_mode(desc))
+ return -EIO;
+ return ubi_is_mapped(desc, lnum);
+}
+
+#endif /* CONFIG_UBIFS_FS_DEBUG */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/debug.h avr32-2.6/fs/ubifs/debug.h
--- linux-2.6.25.6/fs/ubifs/debug.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/debug.h 2008-06-12 15:09:45.315815846 +0200
@@ -0,0 +1,396 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+#ifndef __UBIFS_DEBUG_H__
+#define __UBIFS_DEBUG_H__
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+
+#define UBIFS_DBG(op) op
+
+#define ubifs_assert(expr) do { \
+ if (unlikely(!(expr))) { \
+ printk(KERN_CRIT "UBIFS assert failed in %s at %u (pid %d)\n", \
+ __func__, __LINE__, current->pid); \
+ dbg_dump_stack(); \
+ } \
+} while (0)
+
+#define ubifs_assert_cmt_locked(c) do { \
+ if (unlikely(down_write_trylock(&(c)->commit_sem))) { \
+ up_write(&(c)->commit_sem); \
+ printk(KERN_CRIT "commit lock is not locked!\n"); \
+ ubifs_assert(0); \
+ } \
+} while (0)
+
+#define dbg_dump_stack() do { \
+ if (!dbg_failure_mode) \
+ dump_stack(); \
+} while (0)
+
+/* Generic debugging messages */
+#define dbg_msg(fmt, ...) do { \
+ spin_lock(&dbg_lock); \
+ printk(KERN_DEBUG "UBIFS DBG (pid %d): %s: " fmt "\n", current->pid, \
+ __func__, ##__VA_ARGS__); \
+ spin_unlock(&dbg_lock); \
+} while (0)
+
+#define dbg_do_msg(typ, fmt, ...) do { \
+ if (ubifs_msg_flags & typ) \
+ dbg_msg(fmt, ##__VA_ARGS__); \
+} while (0)
+
+#define dbg_err(fmt, ...) do { \
+ spin_lock(&dbg_lock); \
+ ubifs_err(fmt, ##__VA_ARGS__); \
+ spin_unlock(&dbg_lock); \
+} while (0)
+
+const char *dbg_key_str0(const struct ubifs_info *c,
+ const union ubifs_key *key);
+const char *dbg_key_str1(const struct ubifs_info *c,
+ const union ubifs_key *key);
+
+/*
+ * DBGKEY macros require dbg_lock to be held, which it is in the dbg message
+ * macros.
+ */
+#define DBGKEY(key) dbg_key_str0(c, (key))
+#define DBGKEY1(key) dbg_key_str1(c, (key))
+
+/* General messages */
+#define dbg_gen(fmt, ...) dbg_do_msg(UBIFS_MSG_GEN, fmt, ##__VA_ARGS__)
+
+/* Additional journal messages */
+#define dbg_jnl(fmt, ...) dbg_do_msg(UBIFS_MSG_JNL, fmt, ##__VA_ARGS__)
+
+/* Additional TNC messages */
+#define dbg_tnc(fmt, ...) dbg_do_msg(UBIFS_MSG_TNC, fmt, ##__VA_ARGS__)
+
+/* Additional lprops messages */
+#define dbg_lp(fmt, ...) dbg_do_msg(UBIFS_MSG_LP, fmt, ##__VA_ARGS__)
+
+/* Additional LEB find messages */
+#define dbg_find(fmt, ...) dbg_do_msg(UBIFS_MSG_FIND, fmt, ##__VA_ARGS__)
+
+/* Additional mount messages */
+#define dbg_mnt(fmt, ...) dbg_do_msg(UBIFS_MSG_MNT, fmt, ##__VA_ARGS__)
+
+/* Additional I/O messages */
+#define dbg_io(fmt, ...) dbg_do_msg(UBIFS_MSG_IO, fmt, ##__VA_ARGS__)
+
+/* Additional commit messages */
+#define dbg_cmt(fmt, ...) dbg_do_msg(UBIFS_MSG_CMT, fmt, ##__VA_ARGS__)
+
+/* Additional budgeting messages */
+#define dbg_budg(fmt, ...) dbg_do_msg(UBIFS_MSG_BUDG, fmt, ##__VA_ARGS__)
+
+/* Additional log messages */
+#define dbg_log(fmt, ...) dbg_do_msg(UBIFS_MSG_LOG, fmt, ##__VA_ARGS__)
+
+/* Additional gc messages */
+#define dbg_gc(fmt, ...) dbg_do_msg(UBIFS_MSG_GC, fmt, ##__VA_ARGS__)
+
+/* Additional scan messages */
+#define dbg_scan(fmt, ...) dbg_do_msg(UBIFS_MSG_SCAN, fmt, ##__VA_ARGS__)
+
+/* Additional recovery messages */
+#define dbg_rcvry(fmt, ...) dbg_do_msg(UBIFS_MSG_RCVRY, fmt, ##__VA_ARGS__)
+
+/*
+ * Debugging message type flags (must match msg_type_names in debug.c).
+ *
+ * UBIFS_MSG_GEN: general messages
+ * UBIFS_MSG_JNL: journal messages
+ * UBIFS_MSG_MNT: mount messages
+ * UBIFS_MSG_CMT: commit messages
+ * UBIFS_MSG_FIND: LEB find messages
+ * UBIFS_MSG_BUDG: budgeting messages
+ * UBIFS_MSG_GC: garbage collection messages
+ * UBIFS_MSG_TNC: TNC messages
+ * UBIFS_MSG_LP: lprops messages
+ * UBIFS_MSG_IO: I/O messages
+ * UBIFS_MSG_LOG: log messages
+ * UBIFS_MSG_SCAN: scan messages
+ * UBIFS_MSG_RCVRY: recovery messages
+ */
+enum {
+ UBIFS_MSG_GEN = 0x1,
+ UBIFS_MSG_JNL = 0x2,
+ UBIFS_MSG_MNT = 0x4,
+ UBIFS_MSG_CMT = 0x8,
+ UBIFS_MSG_FIND = 0x10,
+ UBIFS_MSG_BUDG = 0x20,
+ UBIFS_MSG_GC = 0x40,
+ UBIFS_MSG_TNC = 0x80,
+ UBIFS_MSG_LP = 0x100,
+ UBIFS_MSG_IO = 0x200,
+ UBIFS_MSG_LOG = 0x400,
+ UBIFS_MSG_SCAN = 0x800,
+ UBIFS_MSG_RCVRY = 0x1000,
+};
+
+/* Debugging message type flags for each default debug message level */
+#define UBIFS_MSG_LVL_0 0
+#define UBIFS_MSG_LVL_1 0x1
+#define UBIFS_MSG_LVL_2 0x7f
+#define UBIFS_MSG_LVL_3 0xffff
+
+/*
+ * Debugging check flags (must match chk_names in debug.c).
+ *
+ * UBIFS_CHK_GEN: general checks
+ * UBIFS_CHK_TNC: check TNC
+ * UBIFS_CHK_IDX_SZ: check index size
+ * UBIFS_CHK_ORPH: check orphans
+ * UBIFS_CHK_OLD_IDX: check the old index
+ * UBIFS_CHK_LPROPS: check lprops
+ * UBIFS_CHK_FS: check the file-system
+ */
+enum {
+ UBIFS_CHK_GEN = 0x1,
+ UBIFS_CHK_TNC = 0x2,
+ UBIFS_CHK_IDX_SZ = 0x4,
+ UBIFS_CHK_ORPH = 0x8,
+ UBIFS_CHK_OLD_IDX = 0x10,
+ UBIFS_CHK_LPROPS = 0x20,
+ UBIFS_CHK_FS = 0x40,
+};
+
+/*
+ * Special testing flags (must match tst_names in debug.c).
+ *
+ * UBIFS_TST_FORCE_IN_THE_GAPS: force the use of in-the-gaps method
+ * UBIFS_TST_RCVRY: failure mode for recovery testing
+ */
+enum {
+ UBIFS_TST_FORCE_IN_THE_GAPS = 0x2,
+ UBIFS_TST_RCVRY = 0x4,
+};
+
+#if CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 1
+#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_1
+#elif CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 2
+#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_2
+#elif CONFIG_UBIFS_FS_DEBUG_MSG_LVL == 3
+#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_3
+#else
+#define UBIFS_MSG_FLAGS_DEFAULT UBIFS_MSG_LVL_0
+#endif
+
+#ifdef CONFIG_UBIFS_FS_DEBUG_CHKS
+#define UBIFS_CHK_FLAGS_DEFAULT 0xffffffff
+#else
+#define UBIFS_CHK_FLAGS_DEFAULT 0
+#endif
+
+extern spinlock_t dbg_lock;
+
+extern unsigned int ubifs_msg_flags;
+extern unsigned int ubifs_chk_flags;
+extern unsigned int ubifs_tst_flags;
+
+/* Dump functions */
+
+const char *dbg_ntype(int type);
+const char *dbg_cstate(int cmt_state);
+const char *dbg_get_key_dump(const struct ubifs_info *c,
+ const union ubifs_key *key);
+void dbg_dump_inode(const struct ubifs_info *c, const struct inode *inode);
+void dbg_dump_node(const struct ubifs_info *c, const void *node);
+void dbg_dump_budget_req(const struct ubifs_budget_req *req);
+void dbg_dump_lstats(const struct ubifs_lp_stats *lst);
+void dbg_dump_budg(struct ubifs_info *c);
+void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp);
+void dbg_dump_lprops(struct ubifs_info *c);
+void dbg_dump_leb(const struct ubifs_info *c, int lnum);
+void dbg_dump_znode(const struct ubifs_info *c,
+ const struct ubifs_znode *znode);
+void dbg_dump_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat);
+void dbg_dump_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode,
+ struct ubifs_nnode *parent, int iip);
+void dbg_dump_tnc(struct ubifs_info *c);
+void dbg_dump_index(struct ubifs_info *c);
+
+/* Checking helper functions */
+
+typedef int (*dbg_leaf_callback)(struct ubifs_info *c,
+ struct ubifs_zbranch *zbr, void *priv);
+typedef int (*dbg_znode_callback)(struct ubifs_info *c,
+ struct ubifs_znode *znode, void *priv);
+
+int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb,
+ dbg_znode_callback znode_cb, void *priv);
+
+/* Checking functions */
+
+int dbg_check_lprops(struct ubifs_info *c);
+
+int dbg_old_index_check_init(struct ubifs_info *c, struct ubifs_zbranch *zroot);
+int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot);
+
+int dbg_check_cats(struct ubifs_info *c);
+
+int dbg_check_ltab(struct ubifs_info *c);
+
+int dbg_check_dir_size(struct ubifs_info *c, const struct inode *dir);
+
+int dbg_check_tnc(struct ubifs_info *c, int extra);
+
+int dbg_check_idx_size(struct ubifs_info *c, long long idx_size);
+
+int dbg_check_filesystem(struct ubifs_info *c);
+
+void dbg_check_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat,
+ int add_pos);
+
+int dbg_check_lprops(struct ubifs_info *c);
+int dbg_check_lpt_nodes(struct ubifs_info *c, struct ubifs_cnode *cnode,
+ int row, int col);
+
+/* Force the use of in-the-gaps method for testing */
+
+#define dbg_force_in_the_gaps_enabled \
+ (ubifs_tst_flags & UBIFS_TST_FORCE_IN_THE_GAPS)
+
+int dbg_force_in_the_gaps(void);
+
+/* Failure mode for recovery testing */
+
+#define dbg_failure_mode (ubifs_tst_flags & UBIFS_TST_RCVRY)
+
+void dbg_failure_mode_registration(struct ubifs_info *c);
+void dbg_failure_mode_deregistration(struct ubifs_info *c);
+
+#ifndef UBIFS_DBG_PRESERVE_UBI
+
+#define ubi_leb_read dbg_leb_read
+#define ubi_leb_write dbg_leb_write
+#define ubi_leb_change dbg_leb_change
+#define ubi_leb_erase dbg_leb_erase
+#define ubi_leb_unmap dbg_leb_unmap
+#define ubi_is_mapped dbg_is_mapped
+
+#endif
+
+int dbg_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
+ int len, int check);
+int dbg_leb_write(struct ubi_volume_desc *desc, int lnum, const void *buf,
+ int offset, int len, int dtype);
+int dbg_leb_change(struct ubi_volume_desc *desc, int lnum, const void *buf,
+ int len, int dtype);
+int dbg_leb_erase(struct ubi_volume_desc *desc, int lnum);
+int dbg_leb_unmap(struct ubi_volume_desc *desc, int lnum);
+int dbg_is_mapped(struct ubi_volume_desc *desc, int lnum);
+
+static inline int dbg_read(struct ubi_volume_desc *desc, int lnum, char *buf,
+ int offset, int len)
+{
+ return dbg_leb_read(desc, lnum, buf, offset, len, 0);
+}
+
+static inline int dbg_write(struct ubi_volume_desc *desc, int lnum,
+ const void *buf, int offset, int len)
+{
+ return dbg_leb_write(desc, lnum, buf, offset, len, UBI_UNKNOWN);
+}
+
+static inline int dbg_change(struct ubi_volume_desc *desc, int lnum,
+ const void *buf, int len)
+{
+ return dbg_leb_change(desc, lnum, buf, len, UBI_UNKNOWN);
+}
+
+#else /* !CONFIG_UBIFS_FS_DEBUG */
+
+#define UBIFS_DBG(op)
+#define ubifs_assert(expr) ({})
+#define ubifs_assert_cmt_locked(c)
+#define dbg_dump_stack()
+#define dbg_err(fmt, ...) ({})
+#define dbg_msg(fmt, ...) ({})
+#define dbg_key(c, key, fmt, ...) ({})
+
+#define dbg_gen(fmt, ...) ({})
+#define dbg_jnl(fmt, ...) ({})
+#define dbg_tnc(fmt, ...) ({})
+#define dbg_lp(fmt, ...) ({})
+#define dbg_find(fmt, ...) ({})
+#define dbg_mnt(fmt, ...) ({})
+#define dbg_io(fmt, ...) ({})
+#define dbg_cmt(fmt, ...) ({})
+#define dbg_budg(fmt, ...) ({})
+#define dbg_log(fmt, ...) ({})
+#define dbg_gc(fmt, ...) ({})
+#define dbg_scan(fmt, ...) ({})
+#define dbg_rcvry(fmt, ...) ({})
+
+#define dbg_ntype(type) ""
+#define dbg_cstate(cmt_state) ""
+#define dbg_get_key_dump(c, key) ({})
+#define dbg_dump_inode(c, inode) ({})
+#define dbg_dump_node(c, node) ({})
+#define dbg_dump_budget_req(req) ({})
+#define dbg_dump_lstats(lst) ({})
+#define dbg_dump_budg(c) ({})
+#define dbg_dump_lprop(c, lp) ({})
+#define dbg_dump_lprops(c) ({})
+#define dbg_dump_leb(c, lnum) ({})
+#define dbg_dump_znode(c, znode) ({})
+#define dbg_dump_heap(c, heap, cat) ({})
+#define dbg_dump_pnode(c, pnode, parent, iip) ({})
+#define dbg_dump_tnc(c) ({})
+#define dbg_dump_index(c) ({})
+
+#define dbg_walk_index(c, leaf_cb, znode_cb, priv) 0
+
+#define dbg_old_index_check_init(c, zroot) 0
+#define dbg_check_old_index(c, zroot) 0
+
+#define dbg_check_cats(c) 0
+
+#define dbg_check_ltab(c) 0
+
+#define dbg_check_dir_size(c, dir) 0
+
+#define dbg_check_tnc(c, x) 0
+
+#define dbg_check_idx_size(c, idx_size) 0
+#define dbg_check_filesystem(c) 0
+
+#define dbg_check_heap(c, heap, cat, add_pos) ({})
+
+#define dbg_check_lprops(c) 0
+#define dbg_check_lpt_nodes(c, cnode, row, col) 0
+
+#define dbg_force_in_the_gaps_enabled 0
+#define dbg_force_in_the_gaps() 0
+
+#define dbg_failure_mode 0
+#define dbg_failure_mode_registration(c) ({})
+#define dbg_failure_mode_deregistration(c) ({})
+
+#endif /* !CONFIG_UBIFS_FS_DEBUG */
+
+#endif /* !__UBIFS_DEBUG_H__ */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/dir.c avr32-2.6/fs/ubifs/dir.c
--- linux-2.6.25.6/fs/ubifs/dir.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/dir.c 2008-06-12 15:09:45.364399968 +0200
@@ -0,0 +1,1017 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ * Copyright (C) 2006, 2007 University of Szeged, Hungary
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ * Zoltan Sogor
+ */
+
+/*
+ * This file implements directory operations.
+ *
+ * All FS operations in this file allocate budget before writing anything to the
+ * media. If they fail to allocate it, the error is returned. The only
+ * exceptions are 'ubifs_unlink()' and 'ubifs_rmdir()' which keep working even
+ * if they unable to allocate the budget, because deletion %-ENOSPC failure is
+ * not what users are usually ready to get. UBIFS budgeting subsystem has some
+ * space reserved for these purposes.
+ *
+ * All operations in this file change the parent inode, e.g., 'ubifs_link()'
+ * changes ctime and nlink of the parent inode. The parent inode is written to
+ * the media straight away - it is not marked as dirty and there is no
+ * write-back for it. This was done to simplify file-system recovery which
+ * would otherwise be very difficult to do. So instead of marking the parent
+ * inode dirty, the operations mark it clean.
+ */
+
+#include "ubifs.h"
+
+/*
+ * Provide backing_dev_info in order to disable readahead. For UBIFS, I/O is
+ * not deferred, it is done immediately in readpage, which means the user would
+ * have to wait not just for their own I/O but the readahead I/O as well i.e.
+ * completely pointless.
+ */
+struct backing_dev_info ubifs_backing_dev_info = {
+ .ra_pages = 0, /* Set to zero to disable readahead */
+ .state = 0,
+ .capabilities = BDI_CAP_MAP_COPY,
+ .unplug_io_fn = default_unplug_io_fn,
+};
+
+/**
+ * inherit_flags - inherit flags of the parent inode.
+ * @dir: parent inode
+ * @mode: new inode mode flags
+ *
+ * This is a helper function for 'ubifs_new_inode()' which inherits flag of the
+ * parent directory inode @dir. UBIFS inodes inherit the following flags:
+ * o %UBIFS_COMPR_FL, which is useful to switch compression on/of on
+ * sub-directory basis;
+ * o %UBIFS_SYNC_FL - useful for the same reasons;
+ * o %UBIFS_DIRSYNC_FL - similar, but relevant only to directories.
+ *
+ * This function returns the inherited flags.
+ */
+static int inherit_flags(const struct inode *dir, int mode)
+{
+ int flags;
+ const struct ubifs_inode *ui = ubifs_inode(dir);
+
+ if (!S_ISDIR(dir->i_mode))
+ /*
+ * The parent is not a directory, which means that an extended
+ * attribute inode is being created. No flags.
+ */
+ return 0;
+
+ flags = ui->flags & (UBIFS_COMPR_FL | UBIFS_SYNC_FL | UBIFS_DIRSYNC_FL);
+ if (!S_ISDIR(mode))
+ /* The "DIRSYNC" flag only applies to directories */
+ flags &= ~UBIFS_DIRSYNC_FL;
+
+ return flags;
+}
+
+/**
+ * ubifs_new_inode - allocate new UBIFS inode object.
+ * @c: UBIFS file-system description object
+ * @dir: parent directory inode
+ * @mode: inode mode flags
+ *
+ * This function finds an unused inode number, allocates new inode and
+ * initializes it. Returns new inode in case of success and an error code in
+ * case of failure.
+ */
+struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir,
+ int mode)
+{
+ struct inode *inode;
+ struct ubifs_inode *ui;
+
+ inode = new_inode(c->vfs_sb);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+
+ /*
+ * Set 'S_NOCMTIME' to prevent VFS form updating [mc]time of inodes and
+ * marking them dirty in file write path (see 'file_update_time()').
+ * UBIFS has to fully control "clean <-> dirty" transitions of inodes
+ * to make budgeting work.
+ */
+ inode->i_flags |= (S_NOCMTIME);
+
+ inode->i_uid = current->fsuid;
+ if (dir->i_mode & S_ISGID) {
+ inode->i_gid = dir->i_gid;
+ if (S_ISDIR(mode))
+ mode |= S_ISGID;
+ } else
+ inode->i_gid = current->fsgid;
+ inode->i_mode = mode;
+ inode->i_mtime = inode->i_atime = inode->i_ctime =
+ ubifs_current_time(inode);
+ inode->i_mapping->nrpages = 0;
+ /* Disable readahead */
+ inode->i_mapping->backing_dev_info = &ubifs_backing_dev_info;
+
+ switch (mode & S_IFMT) {
+ case S_IFREG:
+ inode->i_mapping->a_ops = &ubifs_file_address_operations;
+ inode->i_op = &ubifs_file_inode_operations;
+ inode->i_fop = &ubifs_file_operations;
+ break;
+ case S_IFDIR:
+ inode->i_op = &ubifs_dir_inode_operations;
+ inode->i_fop = &ubifs_dir_operations;
+ inode->i_size = UBIFS_INO_NODE_SZ;
+ break;
+ case S_IFLNK:
+ inode->i_op = &ubifs_symlink_inode_operations;
+ break;
+ case S_IFSOCK:
+ case S_IFIFO:
+ case S_IFBLK:
+ case S_IFCHR:
+ inode->i_op = &ubifs_file_inode_operations;
+ break;
+ default:
+ BUG();
+ }
+
+ ui = ubifs_inode(inode);
+ ui->flags = inherit_flags(dir, mode);
+ ubifs_set_inode_flags(inode);
+
+ if (S_ISREG(mode))
+ ui->compr_type = c->default_compr;
+ else
+ ui->compr_type = UBIFS_COMPR_NONE;
+
+ spin_lock(&c->cnt_lock);
+ /* Inode number overflow is currently not supported */
+ if (c->highest_inum >= INUM_WARN_WATERMARK) {
+ if (c->highest_inum >= INUM_WATERMARK) {
+ spin_unlock(&c->cnt_lock);
+ ubifs_err("out of inode numbers");
+ make_bad_inode(inode);
+ iput(inode);
+ return ERR_PTR(-EINVAL);
+ }
+ ubifs_warn("running out of inode numbers (current %lu, max %d)",
+ c->highest_inum, INUM_WATERMARK);
+ }
+
+ inode->i_ino = ++c->highest_inum;
+ inode->i_generation = ++c->vfs_gen;
+ /*
+ * The creation sequence number remains with this inode for its
+ * lifetime. All nodes for this inode have a greater sequence number,
+ * and so it is possible to distinguish obsolete nodes belonging to a
+ * previous incarnation of the same inode number - for example, for the
+ * purpose of rebuilding the index.
+ */
+ ui->creat_sqnum = ++c->max_sqnum;
+ spin_unlock(&c->cnt_lock);
+
+ return inode;
+}
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+
+static int dbg_check_name(struct ubifs_dent_node *dent, struct qstr *nm)
+{
+ if (!(ubifs_chk_flags & UBIFS_CHK_GEN))
+ return 0;
+ if (le16_to_cpu(dent->nlen) != nm->len)
+ return -EINVAL;
+ if (memcmp(dent->name, nm->name, nm->len))
+ return -EINVAL;
+ return 0;
+}
+
+#else
+
+#define dbg_check_name(dent, nm) 0
+
+#endif
+
+static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd)
+{
+ int err;
+ union ubifs_key key;
+ struct inode *inode = NULL;
+ struct ubifs_dent_node *dent;
+ struct ubifs_info *c = dir->i_sb->s_fs_info;
+
+ dbg_gen("'%.*s' in dir ino %lu",
+ dentry->d_name.len, dentry->d_name.name, dir->i_ino);
+
+ if (dentry->d_name.len > UBIFS_MAX_NLEN)
+ return ERR_PTR(-ENAMETOOLONG);
+
+ dent = kmalloc(UBIFS_MAX_DENT_NODE_SZ, GFP_NOFS);
+ if (!dent)
+ return ERR_PTR(-ENOMEM);
+
+ dent_key_init(c, &key, dir->i_ino, &dentry->d_name);
+
+ err = ubifs_tnc_lookup_nm(c, &key, dent, &dentry->d_name);
+ if (err) {
+ if (err == -ENOENT) {
+ dbg_gen("not found");
+ goto done;
+ }
+ goto out;
+ }
+
+ if (dbg_check_name(dent, &dentry->d_name)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ inode = ubifs_iget(dir->i_sb, le64_to_cpu(dent->inum));
+ if (IS_ERR(inode)) {
+ /*
+ * This should not happen. Probably the file-system needs
+ * checking.
+ */
+ err = PTR_ERR(inode);
+ ubifs_err("dead directory entry '%.*s', error %d",
+ dentry->d_name.len, dentry->d_name.name, err);
+ ubifs_ro_mode(c, err);
+ goto out;
+ }
+
+done:
+ kfree(dent);
+ /*
+ * Note, d_splice_alias() would be required instead if we supported
+ * NFS.
+ */
+ d_add(dentry, inode);
+ return NULL;
+
+out:
+ kfree(dent);
+ return ERR_PTR(err);
+}
+
+static int ubifs_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *nd)
+{
+ struct inode *inode;
+ struct ubifs_info *c = dir->i_sb->s_fs_info;
+ struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
+ int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
+
+ dbg_gen("dent '%.*s', mode %#x in dir ino %lu",
+ dentry->d_name.len, dentry->d_name.name, mode, dir->i_ino);
+
+ inode = ubifs_new_inode(c, dir, mode);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ err = ubifs_budget_inode_op(c, dir, &req);
+ if (err)
+ goto out;
+
+ dir->i_size += sz_change;
+
+ err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0,
+ IS_DIRSYNC(dir), 0);
+ if (err)
+ goto out_budg;
+
+ insert_inode_hash(inode);
+ d_instantiate(dentry, inode);
+ ubifs_release_ino_clean(c, dir, &req);
+ return 0;
+
+out_budg:
+ dir->i_size -= sz_change;
+ ubifs_cancel_ino_op(c, dir, &req);
+ ubifs_err("cannot create regular file, error %d", err);
+out:
+ make_bad_inode(inode);
+ iput(inode);
+ return err;
+}
+
+/**
+ * vfs_dent_type - get VFS directory entry type.
+ * @type: UBIFS directory entry type
+ *
+ * This function converts UBIFS directory entry type into VFS directory entry
+ * type.
+ */
+static unsigned int vfs_dent_type(uint8_t type)
+{
+ switch (type) {
+ case UBIFS_ITYPE_REG:
+ return DT_REG;
+ case UBIFS_ITYPE_DIR:
+ return DT_DIR;
+ case UBIFS_ITYPE_LNK:
+ return DT_LNK;
+ case UBIFS_ITYPE_BLK:
+ return DT_BLK;
+ case UBIFS_ITYPE_CHR:
+ return DT_CHR;
+ case UBIFS_ITYPE_FIFO:
+ return DT_FIFO;
+ case UBIFS_ITYPE_SOCK:
+ return DT_SOCK;
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+/*
+ * The classical Unix view for directory is that it is a linear array of
+ * (name, inode number) entries. Linux/VFS assumes this model as well.
+ * Particularly, 'readdir()' call wants us to return a directory entry offset
+ * which later may be used to continue 'readdir()'ing the directory or to
+ * 'seek()' to that specific direntry. Obviously UBIFS does not really fit this
+ * model because directory entries are identified by keys, which may collide.
+ *
+ * UBIFS uses directory entry hash value for directory offsets, so
+ * 'seekdir()'/'telldir()' may not always work because of possible key
+ * collisions. But UBIFS guarantees that consecutive 'readdir()' calls work
+ * properly by means of saving full directory entry name in the private field
+ * of the file description object.
+ *
+ * This means that UBIFS cannot support NFS which requires full
+ * 'seekdir()'/'telldir()' support.
+ */
+static int ubifs_readdir(struct file *file, void *dirent, filldir_t filldir)
+{
+ int err, over = 0;
+ struct qstr nm;
+ union ubifs_key key;
+ struct ubifs_dent_node *dent;
+ struct inode *dir = file->f_path.dentry->d_inode;
+ struct ubifs_info *c = dir->i_sb->s_fs_info;
+
+ dbg_gen("dir ino %lu, f_pos %#llx", dir->i_ino, file->f_pos);
+
+ if (file->f_pos > UBIFS_S_KEY_HASH_MASK || file->f_pos == 2)
+ /*
+ * The directory was seek'ed to a senseless position or there
+ * are no more entries.
+ */
+ return 0;
+
+ /* File positions 0 and 1 correspond to "." and ".." */
+ if (file->f_pos == 0) {
+ ubifs_assert(!file->private_data);
+ over = filldir(dirent, ".", 1, 0, dir->i_ino, DT_DIR);
+ if (over)
+ return 0;
+ file->f_pos = 1;
+ }
+
+ if (file->f_pos == 1) {
+ ubifs_assert(!file->private_data);
+ over = filldir(dirent, "..", 2, 1,
+ parent_ino(file->f_path.dentry), DT_DIR);
+ if (over)
+ return 0;
+
+ /* Find the first entry in TNC and save it */
+ lowest_dent_key(c, &key, dir->i_ino);
+ nm.name = NULL;
+ dent = ubifs_tnc_next_ent(c, &key, &nm);
+ if (IS_ERR(dent)) {
+ err = PTR_ERR(dent);
+ goto out;
+ }
+
+ file->f_pos = key_hash_flash(c, &dent->key);
+ file->private_data = dent;
+ }
+
+ dent = file->private_data;
+ if (!dent) {
+ /*
+ * The directory was seek'ed to and is now readdir'ed.
+ * Find the entry corresponding to @file->f_pos or the
+ * closest one.
+ */
+ dent_key_init_hash(c, &key, dir->i_ino, file->f_pos);
+ nm.name = NULL;
+ dent = ubifs_tnc_next_ent(c, &key, &nm);
+ if (IS_ERR(dent)) {
+ err = PTR_ERR(dent);
+ goto out;
+ }
+ file->f_pos = key_hash_flash(c, &dent->key);
+ file->private_data = dent;
+ }
+
+ while (1) {
+ dbg_gen("feed '%s', ino %llu, new f_pos %#x",
+ dent->name, le64_to_cpu(dent->inum),
+ key_hash_flash(c, &dent->key));
+ ubifs_assert(dent->ch.sqnum > ubifs_inode(dir)->creat_sqnum);
+
+ nm.len = le16_to_cpu(dent->nlen);
+ over = filldir(dirent, dent->name, nm.len, file->f_pos,
+ le64_to_cpu(dent->inum),
+ vfs_dent_type(dent->type));
+ if (over)
+ return 0;
+
+ /* Switch to the next entry */
+ key_read(c, &dent->key, &key);
+ nm.name = dent->name;
+ dent = ubifs_tnc_next_ent(c, &key, &nm);
+ if (IS_ERR(dent)) {
+ err = PTR_ERR(dent);
+ goto out;
+ }
+
+ kfree(file->private_data);
+ file->f_pos = key_hash_flash(c, &dent->key);
+ file->private_data = dent;
+ cond_resched();
+ }
+
+out:
+ if (err != -ENOENT) {
+ ubifs_err("cannot find next direntry, error %d", err);
+ return err;
+ }
+
+ kfree(file->private_data);
+ file->private_data = NULL;
+ file->f_pos = 2;
+ return 0;
+}
+
+/* If a directory is seeked, we have to free saved readdir() state */
+loff_t ubifs_dir_llseek(struct file *file, loff_t offset, int origin)
+{
+ kfree(file->private_data);
+ file->private_data = NULL;
+ return generic_file_llseek(file, offset, origin);
+}
+
+/* Free saved readdir() state when the directory is closed */
+static int ubifs_dir_release(struct inode *dir, struct file *file)
+{
+ kfree(file->private_data);
+ file->private_data = NULL;
+ return 0;
+}
+
+static int ubifs_link(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
+{
+ struct ubifs_info *c = dir->i_sb->s_fs_info;
+ struct inode *inode = old_dentry->d_inode;
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ struct ubifs_budget_req req = { .new_dent = 1, .dirtied_ino = 1,
+ .dirtied_ino_d = ui->data_len };
+ int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
+
+ dbg_gen("dent '%.*s' to ino %lu (nlink %d) in dir ino %lu",
+ dentry->d_name.len, dentry->d_name.name, inode->i_ino,
+ inode->i_nlink, dir->i_ino);
+
+ err = ubifs_budget_inode_op(c, dir, &req);
+ if (err)
+ return err;
+
+ inc_nlink(inode);
+ dir->i_size += sz_change;
+ inode->i_ctime = dir->i_mtime = dir->i_ctime =
+ ubifs_current_time(inode);
+
+ err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0,
+ IS_DIRSYNC(dir), 0);
+ if (err)
+ goto out_budg;
+
+ atomic_inc(&inode->i_count);
+ d_instantiate(dentry, inode);
+ ubifs_release_ino_clean(c, dir, &req);
+ return 0;
+
+out_budg:
+ dir->i_size -= sz_change;
+ ubifs_cancel_ino_op(c, dir, &req);
+ drop_nlink(inode);
+ iput(inode);
+ return err;
+}
+
+static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ struct ubifs_info *c = dir->i_sb->s_fs_info;
+ struct inode *inode = dentry->d_inode;
+ struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 1 };
+ int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
+ int err, budgeted = 1;
+
+ dbg_gen("dent '%.*s' from ino %lu (nlink %d) in dir ino %lu",
+ dentry->d_name.len, dentry->d_name.name, inode->i_ino,
+ inode->i_nlink, dir->i_ino);
+
+ err = ubifs_budget_inode_op(c, dir, &req);
+ if (err) {
+ if (err != -ENOSPC)
+ return err;
+ err = 0;
+ budgeted = 0;
+ }
+
+ dir->i_size -= sz_change;
+ dir->i_mtime = dir->i_ctime = ubifs_current_time(dir);
+
+ inode->i_ctime = dir->i_ctime;
+ drop_nlink(inode);
+
+ err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1,
+ IS_DIRSYNC(dir), 0);
+ if (err)
+ goto out_budg;
+
+ if (budgeted)
+ ubifs_release_ino_clean(c, dir, &req);
+
+ return 0;
+
+out_budg:
+ dir->i_size += sz_change;
+ inc_nlink(inode);
+ if (budgeted)
+ ubifs_cancel_ino_op(c, dir, &req);
+ return err;
+}
+
+/**
+ * check_dir_empty - check if a directory is empty or not.
+ * @c: UBIFS file-system description object
+ * @dir: VFS inode object of the directory to check
+ *
+ * This function checks if directory @dir is empty. Returns zero if the
+ * directory is empty, %-ENOTEMPTY if it is not, and other negative error codes
+ * in case of of errors.
+ */
+static int check_dir_empty(struct ubifs_info *c, struct inode *dir)
+{
+ struct qstr nm = { .name = NULL };
+ struct ubifs_dent_node *dent;
+ union ubifs_key key;
+ int err;
+
+ lowest_dent_key(c, &key, dir->i_ino);
+ dent = ubifs_tnc_next_ent(c, &key, &nm);
+ if (IS_ERR(dent)) {
+ err = PTR_ERR(dent);
+ if (err == -ENOENT)
+ err = 0;
+ } else {
+ kfree(dent);
+ err = -ENOTEMPTY;
+ }
+
+ return err;
+}
+
+static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ struct ubifs_info *c = dir->i_sb->s_fs_info;
+ struct inode *inode = dentry->d_inode;
+ struct ubifs_budget_req req = { .mod_dent = 1, .dirtied_ino = 1 };
+ int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
+ int err, budgeted = 0;
+
+ dbg_gen("directory '%.*s', ino %lu in dir ino %lu", dentry->d_name.len,
+ dentry->d_name.name, inode->i_ino, dir->i_ino);
+
+ err = check_dir_empty(c, dentry->d_inode);
+ if (err)
+ return err;
+
+ budgeted = 1;
+ err = ubifs_budget_inode_op(c, dir, &req);
+ if (err) {
+ if (err != -ENOSPC)
+ return err;
+ budgeted = 0;
+ }
+
+ dir->i_size -= sz_change;
+ dir->i_mtime = dir->i_ctime = ubifs_current_time(dir);
+ drop_nlink(dir);
+
+ inode->i_size = 0;
+ inode->i_ctime = dir->i_ctime;
+ clear_nlink(inode);
+
+ err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 1,
+ IS_DIRSYNC(dir), 0);
+ if (err)
+ goto out_budg;
+
+ if (budgeted)
+ ubifs_release_ino_clean(c, dir, &req);
+
+ return 0;
+
+out_budg:
+ dir->i_size += sz_change;
+ inc_nlink(dir);
+ inc_nlink(inode);
+ inc_nlink(inode);
+ if (budgeted)
+ ubifs_cancel_ino_op(c, dir, &req);
+ return err;
+}
+
+static int ubifs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+ struct inode *inode;
+ struct ubifs_info *c = dir->i_sb->s_fs_info;
+ struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
+ int err, sz_change = CALC_DENT_SIZE(dentry->d_name.len);
+
+ dbg_gen("dent '%.*s', mode %#x in dir ino %lu",
+ dentry->d_name.len, dentry->d_name.name, mode, dir->i_ino);
+
+ err = ubifs_budget_inode_op(c, dir, &req);
+ if (err)
+ return err;
+
+ inode = ubifs_new_inode(c, dir, S_IFDIR | mode);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out_budg;
+ }
+
+ insert_inode_hash(inode);
+ inc_nlink(inode);
+
+ dir->i_mtime = dir->i_ctime = ubifs_current_time(dir);
+ dir->i_size += sz_change;
+ inc_nlink(dir);
+
+ err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0,
+ IS_DIRSYNC(dir), 0);
+ if (err) {
+ ubifs_err("cannot create directory, error %d", err);
+ goto out_inode;
+ }
+
+ d_instantiate(dentry, inode);
+ ubifs_release_ino_clean(c, dir, &req);
+ return 0;
+
+out_inode:
+ dir->i_size -= sz_change;
+ drop_nlink(dir);
+ make_bad_inode(inode);
+ iput(inode);
+out_budg:
+ ubifs_cancel_ino_op(c, dir, &req);
+ return err;
+}
+
+static int ubifs_mknod(struct inode *dir, struct dentry *dentry,
+ int mode, dev_t rdev)
+{
+ struct inode *inode;
+ struct ubifs_info *c = dir->i_sb->s_fs_info;
+ struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1 };
+ union ubifs_dev_desc *dev = NULL;
+ int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
+ int err, devlen = 0;
+
+ dbg_gen("dent '%.*s' in dir ino %lu",
+ dentry->d_name.len, dentry->d_name.name, dir->i_ino);
+
+ if (!new_valid_dev(rdev))
+ return -EINVAL;
+
+ if (S_ISBLK(mode) || S_ISCHR(mode)) {
+ dev = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
+ if (!dev)
+ return -ENOMEM;
+ devlen = ubifs_encode_dev(dev, rdev);
+ }
+
+ err = ubifs_budget_inode_op(c, dir, &req);
+ if (err) {
+ kfree(dev);
+ return err;
+ }
+
+ inode = ubifs_new_inode(c, dir, mode);
+ if (IS_ERR(inode)) {
+ kfree(dev);
+ err = PTR_ERR(inode);
+ goto out_budg;
+ }
+
+ init_special_inode(inode, inode->i_mode, rdev);
+
+ inode->i_size = devlen;
+ ubifs_inode(inode)->data = dev;
+ ubifs_inode(inode)->data_len = devlen;
+
+ dir->i_size += sz_change;
+
+ err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0,
+ IS_DIRSYNC(dir), 0);
+ if (err)
+ goto out_inode;
+
+ insert_inode_hash(inode);
+ d_instantiate(dentry, inode);
+ ubifs_release_ino_clean(c, dir, &req);
+ return 0;
+
+out_inode:
+ dir->i_size -= sz_change;
+ make_bad_inode(inode);
+ iput(inode);
+out_budg:
+ ubifs_cancel_ino_op(c, dir, &req);
+ return err;
+}
+
+static int ubifs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *symname)
+{
+ struct inode *inode;
+ struct ubifs_inode *ui;
+ struct ubifs_info *c = dir->i_sb->s_fs_info;
+ int err, len = strlen(symname);
+ int sz_change = CALC_DENT_SIZE(dentry->d_name.len);
+ struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
+ .new_ino_d = len };
+
+ dbg_gen("dent '%.*s', target '%s' in dir ino %lu", dentry->d_name.len,
+ dentry->d_name.name, symname, dir->i_ino);
+
+ if (len > UBIFS_MAX_INO_DATA)
+ return -ENAMETOOLONG;
+
+ err = ubifs_budget_inode_op(c, dir, &req);
+ if (err)
+ return err;
+
+ inode = ubifs_new_inode(c, dir, S_IFLNK | S_IRWXUGO);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out_budg;
+ }
+
+ ui = ubifs_inode(inode);
+ ui->data = kmalloc(len + 1, GFP_NOFS);
+ if (!ui->data) {
+ err = -ENOMEM;
+ goto out_inode;
+ }
+
+ memcpy(ui->data, symname, len);
+ ((char *)ui->data)[len] = '\0';
+ /*
+ * The terminating zero byte is not written to the flash media and it
+ * is put just to make later in-memory string processing simpler. Thus,
+ * data length is @len, not @len + %1.
+ */
+ ui->data_len = len;
+ inode->i_size = len;
+
+ dir->i_size += sz_change;
+
+ err = ubifs_jnl_update(c, dir, &dentry->d_name, inode, 0,
+ IS_DIRSYNC(dir), 0);
+ if (err)
+ goto out_dir;
+
+ insert_inode_hash(inode);
+ d_instantiate(dentry, inode);
+ ubifs_release_ino_clean(c, dir, &req);
+ return 0;
+
+out_dir:
+ dir->i_size -= sz_change;
+out_inode:
+ make_bad_inode(inode);
+ iput(inode);
+out_budg:
+ ubifs_cancel_ino_op(c, dir, &req);
+ return err;
+}
+
+static int ubifs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct ubifs_info *c = old_dir->i_sb->s_fs_info;
+ struct inode *old_inode = old_dentry->d_inode;
+ struct inode *new_inode = new_dentry->d_inode;
+ int err, move = (new_dir != old_dir);
+ int is_dir = S_ISDIR(old_inode->i_mode);
+ int unlink = !!new_inode;
+ int dirsync = (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir));
+ int new_sz = CALC_DENT_SIZE(new_dentry->d_name.len);
+ int old_sz = CALC_DENT_SIZE(old_dentry->d_name.len);
+ struct ubifs_budget_req req = { .new_dent = 1, .mod_dent = 1 };
+ struct timespec time = ubifs_current_time(old_dir);
+
+ dbg_gen("dent '%.*s' ino %lu in dir ino %lu to dent '%.*s' in "
+ "dir ino %lu", old_dentry->d_name.len, old_dentry->d_name.name,
+ old_inode->i_ino, old_dir->i_ino, new_dentry->d_name.len,
+ new_dentry->d_name.name, new_dir->i_ino);
+
+ if (unlink && is_dir) {
+ err = check_dir_empty(c, new_inode);
+ if (err)
+ return err;
+ }
+
+ if (move) {
+ req.dirtied_ino = 1;
+ if (unlink) {
+ req.dirtied_ino += 2;
+ req.dirtied_ino_d = ubifs_inode(new_inode)->data_len;
+ }
+ }
+
+ /*
+ * Note, rename may write @new_dir inode if the directory entry is
+ * moved there. And if the @new_dir is dirty, we do not bother to make
+ * it clean. It could be done, but requires extra coding which does not
+ * seem to be really worth it.
+ */
+ err = ubifs_budget_inode_op(c, old_dir, &req);
+ if (err)
+ return err;
+
+ /*
+ * Like most other Unix systems, set the ctime for inodes on a
+ * rename.
+ */
+ old_inode->i_ctime = time;
+
+ /*
+ * If we moved a directory to another parent directory, decrement
+ * 'i_nlink' of the old parent. Also, update 'i_size' of the old parent
+ * as well as its [mc]time.
+ */
+ if (is_dir && move)
+ drop_nlink(old_dir);
+ old_dir->i_size -= old_sz;
+ old_dir->i_mtime = old_dir->i_ctime = time;
+ new_dir->i_mtime = new_dir->i_ctime = time;
+
+ /*
+ * If we moved a directory object to new directory, parent's 'i_nlink'
+ * should be adjusted.
+ */
+ if (move && is_dir)
+ inc_nlink(new_dir);
+
+ /*
+ * And finally, if we unlinked a direntry which happened to have the
+ * same name as the moved direntry, we have to decrement 'i_nlink' of
+ * the unlinked inode and change its ctime.
+ */
+ if (unlink) {
+ /*
+ * Directories cannot have hard-links, so if this is a
+ * directory, decrement its 'i_nlink' twice because an empty
+ * directory has 'i_nlink' 2.
+ */
+ if (is_dir)
+ drop_nlink(new_inode);
+ new_inode->i_ctime = time;
+ drop_nlink(new_inode);
+ } else
+ new_dir->i_size += new_sz;
+
+ err = ubifs_jnl_rename(c, old_dir, old_dentry, new_dir, new_dentry,
+ dirsync);
+ if (err)
+ goto out_inode;
+
+ ubifs_release_ino_clean(c, old_dir, &req);
+ return 0;
+
+out_inode:
+ if (unlink) {
+ if (is_dir)
+ inc_nlink(new_inode);
+ inc_nlink(new_inode);
+ } else
+ new_dir->i_size -= new_sz;
+ old_dir->i_size += old_sz;
+ if (is_dir && move) {
+ drop_nlink(new_dir);
+ inc_nlink(old_dir);
+ }
+ ubifs_cancel_ino_op(c, old_dir, &req);
+ return err;
+}
+
+int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat)
+{
+ struct inode *inode = dentry->d_inode;
+ loff_t size;
+
+ stat->dev = inode->i_sb->s_dev;
+ stat->ino = inode->i_ino;
+ stat->mode = inode->i_mode;
+ stat->nlink = inode->i_nlink;
+ stat->uid = inode->i_uid;
+ stat->gid = inode->i_gid;
+ stat->rdev = inode->i_rdev;
+ stat->atime = inode->i_atime;
+ stat->mtime = inode->i_mtime;
+ stat->ctime = inode->i_ctime;
+ stat->blksize = UBIFS_BLOCK_SIZE;
+ stat->size = i_size_read(inode);
+
+ spin_lock(&inode->i_lock);
+ size = ubifs_inode(inode)->xattr_size;
+ spin_unlock(&inode->i_lock);
+
+ /*
+ * Unfortunately, the 'stat()' system call was designed for block
+ * device based file systems, and it is not appropriate for UBIFS,
+ * because UBIFS does not have notion of "block". For example, it is
+ * difficult to tell how many block a directory takes - it actually
+ * takes less than 300 bytes, but we have to round it to block size,
+ * which introduces large mistake. This makes utilities like 'du' to
+ * report completely senseless numbers. This is the reason why UBIFS
+ * goes the same way as JFFS2 - it reports zero blocks for everything
+ * but regular files, which makes more sense than reporting completely
+ * wrong sizes.
+ */
+ if (S_ISREG(inode->i_mode))
+ size += stat->size;
+
+ size = ALIGN(size, UBIFS_BLOCK_SIZE);
+ /*
+ * Note, user-space expects 512-byte blocks count irrespectively of what
+ * was reported in @stat->size.
+ */
+ stat->blocks = size >> 9;
+
+ return 0;
+}
+
+struct inode_operations ubifs_dir_inode_operations = {
+ .lookup = ubifs_lookup,
+ .create = ubifs_create,
+ .link = ubifs_link,
+ .symlink = ubifs_symlink,
+ .unlink = ubifs_unlink,
+ .mkdir = ubifs_mkdir,
+ .rmdir = ubifs_rmdir,
+ .mknod = ubifs_mknod,
+ .rename = ubifs_rename,
+ .setattr = ubifs_setattr,
+ .getattr = ubifs_getattr,
+#ifdef CONFIG_UBIFS_FS_XATTR
+ .setxattr = ubifs_setxattr,
+ .getxattr = ubifs_getxattr,
+ .listxattr = ubifs_listxattr,
+ .removexattr = ubifs_removexattr,
+#endif
+};
+
+struct file_operations ubifs_dir_operations = {
+ .llseek = ubifs_dir_llseek,
+ .release = ubifs_dir_release,
+ .read = generic_read_dir,
+ .readdir = ubifs_readdir,
+ .fsync = ubifs_fsync,
+ .unlocked_ioctl = ubifs_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = ubifs_compat_ioctl,
+#endif
+};
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/file.c avr32-2.6/fs/ubifs/file.c
--- linux-2.6.25.6/fs/ubifs/file.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/file.c 2008-06-12 15:09:45.364399968 +0200
@@ -0,0 +1,960 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file implements VFS file and inode operations of regular files, device
+ * nodes and symlinks as well as address space operations.
+ *
+ * UBIFS uses 2 page flags: PG_private and PG_checked. PG_private is set if the
+ * page is dirty and is used for budgeting purposes - dirty pages should not be
+ * budgeted. The PG_checked flag is set if full budgeting is required for the
+ * page e.g., when it corresponds to a file hole or it is just beyond the file
+ * size. The budgeting is done in 'ubifs_write_begin()', because it is OK to
+ * fail in this function, and the budget is released in 'ubifs_write_end()'. So
+ * the PG_private and PG_checked flags carry the information about how the page
+ * was budgeted, to make it possible to release the budget properly.
+ *
+ * A thing to keep in mind: inode's 'i_mutex' is locked in most VFS operations
+ * we implement. However, this is not true for '->writepage()', which might be
+ * called with 'i_mutex' unlocked. For example, when pdflush is performing
+ * write-back, it calls 'writepage()' with unlocked 'i_mutex', although the
+ * inode has 'I_LOCK' flag in this case. At "normal" work-paths 'i_mutex' is
+ * locked in '->writepage', e.g. in "sys_write -> alloc_pages -> direct reclaim
+ * path'. So, in '->writepage()' we are only guaranteed that the page is
+ * locked.
+ *
+ * Similarly, 'i_mutex' does not have to be locked in readpage(), e.g.,
+ * readahead path does not have it locked ("sys_read -> generic_file_aio_read
+ * -> ondemand_readahead -> readpage"). In case of readahead, 'I_LOCK' flag is
+ * not set as well.
+ *
+ * This, for example means that there might be 2 concurrent '->writepage()'
+ * calls for the same inode, but different inode dirty pages.
+ */
+
+#include "ubifs.h"
+#include <linux/mount.h>
+
+static int read_block(struct inode *inode, void *addr, unsigned int block,
+ struct ubifs_data_node *dn)
+{
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ int err, len, out_len;
+ union ubifs_key key;
+ unsigned int dlen;
+
+ data_key_init(c, &key, inode->i_ino, block);
+ err = ubifs_tnc_lookup(c, &key, dn);
+ if (err) {
+ if (err == -ENOENT)
+ /* Not found, so it must be a hole */
+ memset(addr, 0, UBIFS_BLOCK_SIZE);
+ return err;
+ }
+
+ ubifs_assert(dn->ch.sqnum > ubifs_inode(inode)->creat_sqnum);
+
+ len = le32_to_cpu(dn->size);
+ if (len <= 0 || len > UBIFS_BLOCK_SIZE)
+ goto dump;
+
+ dlen = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ;
+ out_len = UBIFS_BLOCK_SIZE;
+ err = ubifs_decompress(&dn->data, dlen, addr, &out_len,
+ le16_to_cpu(dn->compr_type));
+ if (err || len != out_len)
+ goto dump;
+
+ /*
+ * Data length can be less than a full block, even for blocks that are
+ * not the last in the file (e.g., as a result of making a hole and
+ * appending data). Ensure that the remainder is zeroed out.
+ */
+ if (len < UBIFS_BLOCK_SIZE)
+ memset(addr + len, 0, UBIFS_BLOCK_SIZE - len);
+
+ return 0;
+
+dump:
+ ubifs_err("bad data node (block %u, inode %lu)",
+ block, inode->i_ino);
+ dbg_dump_node(c, dn);
+ return -EINVAL;
+}
+
+static int do_readpage(struct page *page)
+{
+ void *addr;
+ int err = 0, i;
+ unsigned int block, beyond;
+ struct ubifs_data_node *dn;
+ struct inode *inode = page->mapping->host;
+ loff_t i_size = i_size_read(inode);
+
+ dbg_gen("ino %lu, pg %lu, i_size %lld, flags %#lx",
+ inode->i_ino, page->index, i_size, page->flags);
+ ubifs_assert(!PageChecked(page));
+ ubifs_assert(!PagePrivate(page));
+
+ addr = kmap(page);
+
+ block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT;
+ beyond = (i_size + UBIFS_BLOCK_SIZE - 1) >> UBIFS_BLOCK_SHIFT;
+ if (block >= beyond) {
+ /* Reading beyond inode */
+ SetPageChecked(page);
+ memset(addr, 0, PAGE_CACHE_SIZE);
+ goto out;
+ }
+
+ dn = kmalloc(UBIFS_MAX_DATA_NODE_SZ, GFP_NOFS);
+ if (!dn) {
+ err = -ENOMEM;
+ goto error;
+ }
+
+ i = 0;
+ while (1) {
+ int ret;
+
+ if (block >= beyond) {
+ /* Reading beyond inode */
+ err = -ENOENT;
+ memset(addr, 0, UBIFS_BLOCK_SIZE);
+ } else {
+ ret = read_block(inode, addr, block, dn);
+ if (ret) {
+ err = ret;
+ if (err != -ENOENT)
+ break;
+ }
+ }
+ if (++i >= UBIFS_BLOCKS_PER_PAGE)
+ break;
+ block += 1;
+ addr += UBIFS_BLOCK_SIZE;
+ }
+ if (err) {
+ if (err == -ENOENT) {
+ /* Not found, so it must be a hole */
+ SetPageChecked(page);
+ dbg_gen("hole");
+ goto out_free;
+ }
+ ubifs_err("cannot read page %lu of inode %lu, error %d",
+ page->index, inode->i_ino, err);
+ goto error;
+ }
+
+out_free:
+ kfree(dn);
+out:
+ SetPageUptodate(page);
+ ClearPageError(page);
+ flush_dcache_page(page);
+ kunmap(page);
+ return 0;
+
+error:
+ kfree(dn);
+ ClearPageUptodate(page);
+ SetPageError(page);
+ flush_dcache_page(page);
+ kunmap(page);
+ return err;
+}
+
+static int ubifs_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
+{
+ struct inode *inode = mapping->host;
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
+ struct ubifs_budget_req req = { .new_page = 1 };
+ loff_t i_size = i_size_read(inode);
+ int uninitialized_var(err);
+ struct page *page;
+
+ ubifs_assert(!(inode->i_sb->s_flags & MS_RDONLY));
+
+ if (unlikely(c->ro_media))
+ return -EROFS;
+
+ /*
+ * We are about to have a page of data written and we have to budget for
+ * this. The very important point here is that we have to budget before
+ * locking the page, because budgeting may force write-back, which
+ * would wait on locked pages and deadlock if we had the page locked.
+ *
+ * At this point we do not know anything about the page of data we are
+ * going to change, so assume the biggest budget (i.e., assume that
+ * this is a new page of data and it does not override an older page of
+ * data in the inode). Later the budget will be amended if this is not
+ * true.
+ */
+ if (pos + len > i_size)
+ /*
+ * We are writing beyond the file which means we are going to
+ * change inode size and make the inode dirty. And in turn,
+ * this means we have to budget for making the inode dirty.
+ *
+ * Note, if the inode is already dirty,
+ * 'ubifs_budget_inode_op()' will not allocate any budget,
+ * but will just lock the @budg_mutex of the inode to prevent
+ * it from becoming clean before we have changed its size,
+ * which is going to happen in 'ubifs_write_end()'.
+ */
+ err = ubifs_budget_inode_op(c, inode, &req);
+ else
+ /*
+ * The inode is not going to be marked as dirty by this write
+ * operation, do not budget for this.
+ */
+ err = ubifs_budget_space(c, &req);
+ if (unlikely(err))
+ return err;
+
+ page = __grab_cache_page(mapping, index);
+ if (unlikely(!page)) {
+ err = -ENOMEM;
+ goto out_release;
+ }
+
+ if (!PageUptodate(page)) {
+ /*
+ * The page is not loaded from the flash and has to be loaded
+ * unless we are writing all of it.
+ */
+ if (!(pos & PAGE_CACHE_MASK) && len == PAGE_CACHE_SIZE)
+ /*
+ * Set the PG_checked flag to make the further code
+ * assume the page is new.
+ */
+ SetPageChecked(page);
+ else {
+ err = do_readpage(page);
+ if (err)
+ goto out_unlock;
+ }
+
+ SetPageUptodate(page);
+ ClearPageError(page);
+ }
+
+ if (PagePrivate(page))
+ /*
+ * The page is dirty, which means it was budgeted twice:
+ * o first time the budget was allocated by the task which
+ * made the page dirty and set the PG_private flag;
+ * o and then we budgeted for it for the second time at the
+ * very beginning of this function.
+ *
+ * So what we have to do is to release the page budget we
+ * allocated.
+ *
+ * Note, the page write operation may change the inode length,
+ * which makes it dirty and means the budget should be
+ * allocated. This was done above in the "pos + len > i_size"
+ * case. If this was done, we do not free the the inode budget,
+ * because we cannot as we are really going to mark it dirty in
+ * the 'ubifs_write_end()' function.
+ */
+ ubifs_release_new_page_budget(c);
+ else if (!PageChecked(page))
+ /*
+ * The page is not new, which means we are changing the page
+ * which already exists on the media. This means that changing
+ * the page does not make the amount of indexing information
+ * larger, and this part of the budget which we have already
+ * acquired may be released.
+ */
+ ubifs_convert_page_budget(c);
+
+ *pagep = page;
+ return 0;
+
+out_unlock:
+ unlock_page(page);
+ page_cache_release(page);
+out_release:
+ if (pos + len > i_size)
+ ubifs_cancel_ino_op(c, inode, &req);
+ else
+ ubifs_release_budget(c, &req);
+ return err;
+}
+
+static int ubifs_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata)
+{
+ struct inode *inode = mapping->host;
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ loff_t i_size = i_size_read(inode);
+
+ dbg_gen("ino %lu, pos %llu, pg %lu, len %u, copied %d, i_size %lld",
+ inode->i_ino, pos, page->index, len, copied, i_size);
+
+ if (unlikely(copied < len && len == PAGE_CACHE_SIZE)) {
+ /*
+ * VFS copied less data to the page that it intended and
+ * declared in its '->write_begin()' call via the @len
+ * argument. If the page was not up-to-date, and @len was
+ * @PAGE_CACHE_SIZE, the 'ubifs_write_begin()' function did
+ * not load it from the media (for optimization reasons). This
+ * means that part of the page contains garbage. So read the
+ * page now.
+ */
+ dbg_gen("copied %d instead of %d, read page and repeat",
+ copied, len);
+
+ if (pos + len > i_size)
+ /* See a comment below about this hacky unlock */
+ mutex_unlock(&ui->budg_mutex);
+
+ copied = do_readpage(page);
+
+ /*
+ * Return 0 to force VFS to repeat the whole operation, or the
+ * error code if 'do_readpage()' failed.
+ */
+ goto out;
+ }
+
+ if (!PagePrivate(page)) {
+ SetPagePrivate(page);
+ atomic_long_inc(&c->dirty_pg_cnt);
+ __set_page_dirty_nobuffers(page);
+ }
+
+ if (pos + len > i_size) {
+ i_size_write(inode, pos + len);
+
+ /*
+ * Note, we do not set @I_DIRTY_PAGES (which means that the
+ * inode has dirty pages), this has been done in
+ * '__set_page_dirty_nobuffers()'.
+ */
+ mark_inode_dirty_sync(inode);
+
+ /*
+ * The inode has been marked dirty, unlock it. This is a bit
+ * hacky because normally we would have to call
+ * 'ubifs_release_ino_dirty()'. But we know there is nothing
+ * to release because page's budget will be released in
+ * 'ubifs_write_page()' and inode's budget will be released in
+ * 'ubifs_write_inode()', so just unlock the inode here for
+ * optimization.
+ */
+ mutex_unlock(&ui->budg_mutex);
+ }
+
+out:
+ unlock_page(page);
+ page_cache_release(page);
+ return copied;
+}
+
+static int ubifs_readpage(struct file *file, struct page *page)
+{
+ do_readpage(page);
+ unlock_page(page);
+ return 0;
+}
+
+/**
+ * release_existing_page_budget - release budget of an existing page.
+ * @c: UBIFS file-system description object
+ *
+ * This is a helper function which releases budget corresponding to the budget
+ * of changing one one page of data which already exists on the flash media.
+ *
+ * This function was not moved to "budget.c" because there is only one user.
+ */
+static void release_existing_page_budget(struct ubifs_info *c)
+{
+ struct ubifs_budget_req req = { .dd_growth = c->page_budget};
+
+ ubifs_release_budget(c, &req);
+}
+
+static int do_writepage(struct page *page, int len)
+{
+ int err = 0, i, blen;
+ unsigned int block;
+ void *addr;
+ union ubifs_key key;
+ struct inode *inode = page->mapping->host;
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+
+ /* Update radix tree tags */
+ set_page_writeback(page);
+
+ addr = kmap(page);
+
+ block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT;
+ i = 0;
+ while (len) {
+ blen = min_t(int, len, UBIFS_BLOCK_SIZE);
+ data_key_init(c, &key, inode->i_ino, block);
+ err = ubifs_jnl_write_data(c, inode, &key, addr, blen);
+ if (err)
+ break;
+ if (++i >= UBIFS_BLOCKS_PER_PAGE)
+ break;
+ block += 1;
+ addr += blen;
+ len -= blen;
+ }
+ if (err) {
+ SetPageError(page);
+ ubifs_err("cannot write page %lu of inode %lu, error %d",
+ page->index, inode->i_ino, err);
+ ubifs_ro_mode(c, err);
+ }
+
+ ubifs_assert(PagePrivate(page));
+ if (PageChecked(page))
+ ubifs_release_new_page_budget(c);
+ else
+ release_existing_page_budget(c);
+
+ atomic_long_dec(&c->dirty_pg_cnt);
+ ClearPagePrivate(page);
+ ClearPageChecked(page);
+
+ kunmap(page);
+ unlock_page(page);
+ end_page_writeback(page);
+
+ return err;
+}
+
+static int ubifs_writepage(struct page *page, struct writeback_control *wbc)
+{
+ struct inode *inode = page->mapping->host;
+ loff_t i_size = i_size_read(inode);
+ pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
+ int len;
+ void *kaddr;
+
+ dbg_gen("ino %lu, pg %lu, pg flags %#lx",
+ inode->i_ino, page->index, page->flags);
+ ubifs_assert(PagePrivate(page));
+
+ /* Is the page fully inside i_size? */
+ if (page->index < end_index)
+ return do_writepage(page, PAGE_CACHE_SIZE);
+
+ /* Is the page fully outside i_size? (truncate in progress) */
+ len = i_size & (PAGE_CACHE_SIZE - 1);
+ if (page->index >= end_index + 1 || !len) {
+ unlock_page(page);
+ return 0;
+ }
+
+ /*
+ * The page straddles i_size. It must be zeroed out on each and every
+ * writepage invocation because it may be mmapped. "A file is mapped
+ * in multiples of the page size. For a file that is not a multiple of
+ * the page size, the remaining memory is zeroed when mapped, and
+ * writes to that region are not written out to the file."
+ */
+ kaddr = kmap_atomic(page, KM_USER0);
+ memset(kaddr + len, 0, PAGE_CACHE_SIZE - len);
+ flush_dcache_page(page);
+ kunmap_atomic(kaddr, KM_USER0);
+
+ return do_writepage(page, len);
+}
+
+static int ubifs_trunc(struct inode *inode, loff_t new_size)
+{
+ loff_t old_size;
+ int err;
+
+ dbg_gen("ino %lu, size %lld -> %lld",
+ inode->i_ino, inode->i_size, new_size);
+ old_size = inode->i_size;
+
+ err = vmtruncate(inode, new_size);
+ if (err)
+ return err;
+
+ if (new_size < old_size) {
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ int offset = new_size & (UBIFS_BLOCK_SIZE - 1);
+
+ if (offset) {
+ pgoff_t index = new_size >> PAGE_CACHE_SHIFT;
+ struct page *page;
+
+ page = find_lock_page(inode->i_mapping, index);
+ if (page) {
+ if (PageDirty(page)) {
+ ubifs_assert(PagePrivate(page));
+
+ clear_page_dirty_for_io(page);
+ if (UBIFS_BLOCKS_PER_PAGE_SHIFT)
+ offset = new_size &
+ (PAGE_CACHE_SIZE - 1);
+ err = do_writepage(page, offset);
+ page_cache_release(page);
+ if (err)
+ return err;
+ /*
+ * We could now tell ubifs_jnl_truncate
+ * not to read the last block.
+ */
+ } else {
+ /*
+ * We could 'kmap()' the page and
+ * pass the data to ubifs_jnl_truncate
+ * to save it from having to read it.
+ */
+ unlock_page(page);
+ page_cache_release(page);
+ }
+ }
+ }
+ err = ubifs_jnl_truncate(c, inode->i_ino, old_size, new_size);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+int ubifs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ unsigned int ia_valid = attr->ia_valid;
+ struct inode *inode = dentry->d_inode;
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ struct ubifs_budget_req req;
+ int truncation, err = 0;
+
+ dbg_gen("ino %lu, ia_valid %#x", inode->i_ino, ia_valid);
+ err = inode_change_ok(inode, attr);
+ if (err)
+ return err;
+
+ memset(&req, 0, sizeof(struct ubifs_budget_req));
+
+ /*
+ * If this is truncation, and we do not truncate on a block boundary,
+ * budget for changing one data block, because the last block will be
+ * re-written.
+ */
+ truncation = (ia_valid & ATTR_SIZE) && attr->ia_size != inode->i_size;
+ if (truncation && attr->ia_size < inode->i_size &&
+ (attr->ia_size & (UBIFS_BLOCK_SIZE - 1)))
+ req.dirtied_page = 1;
+
+ err = ubifs_budget_inode_op(c, inode, &req);
+ if (err)
+ return err;
+
+ if (truncation) {
+ err = ubifs_trunc(inode, attr->ia_size);
+ if (err) {
+ ubifs_cancel_ino_op(c, inode, &req);
+ return err;
+ }
+
+ inode->i_mtime = inode->i_ctime = ubifs_current_time(inode);
+ }
+
+ if (ia_valid & ATTR_UID)
+ inode->i_uid = attr->ia_uid;
+ if (ia_valid & ATTR_GID)
+ inode->i_gid = attr->ia_gid;
+ if (ia_valid & ATTR_ATIME)
+ inode->i_atime = timespec_trunc(attr->ia_atime,
+ inode->i_sb->s_time_gran);
+ if (ia_valid & ATTR_MTIME)
+ inode->i_mtime = timespec_trunc(attr->ia_mtime,
+ inode->i_sb->s_time_gran);
+ if (ia_valid & ATTR_CTIME)
+ inode->i_ctime = timespec_trunc(attr->ia_ctime,
+ inode->i_sb->s_time_gran);
+ if (ia_valid & ATTR_MODE) {
+ umode_t mode = attr->ia_mode;
+
+ if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
+ mode &= ~S_ISGID;
+ inode->i_mode = mode;
+ }
+
+ mark_inode_dirty_sync(inode);
+ ubifs_release_ino_dirty(c, inode, &req);
+
+ if (req.dirtied_page) {
+ /*
+ * Truncation code does not make the reenacted page dirty, it
+ * just changes it on journal level, so we have to release page
+ * change budget.
+ */
+ memset(&req, 0, sizeof(struct ubifs_budget_req));
+ req.dd_growth = c->page_budget;
+ ubifs_release_budget(c, &req);
+ }
+
+ if (IS_SYNC(inode))
+ err = write_inode_now(inode, 1);
+
+ return err;
+}
+
+static void ubifs_invalidatepage(struct page *page, unsigned long offset)
+{
+ struct inode *inode = page->mapping->host;
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ struct ubifs_budget_req req;
+
+ ubifs_assert(PagePrivate(page));
+ if (offset)
+ /* Partial page remains dirty */
+ return;
+
+ memset(&req, 0, sizeof(struct ubifs_budget_req));
+ if (PageChecked(page)) {
+ req.new_page = 1;
+ req.idx_growth = -1;
+ req.data_growth = c->page_budget;
+ } else
+ req.dd_growth = c->page_budget;
+ ubifs_release_budget(c, &req);
+
+ atomic_long_dec(&c->dirty_pg_cnt);
+ ClearPagePrivate(page);
+ ClearPageChecked(page);
+}
+
+static void *ubifs_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+ struct ubifs_inode *ui = ubifs_inode(dentry->d_inode);
+
+ nd_set_link(nd, ui->data);
+ return NULL;
+}
+
+int ubifs_fsync(struct file *file, struct dentry *dentry, int datasync)
+{
+ struct inode *inode = dentry->d_inode;
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ int err;
+
+ dbg_gen("syncing inode %lu", inode->i_ino);
+
+ /* Synchronize the inode and dirty pages */
+ err = write_inode_now(inode, 1);
+ if (err)
+ return err;
+
+ /*
+ * Some data related to this inode may still sit in a write-buffer.
+ * Flush them.
+ */
+ err = ubifs_sync_wbufs_by_inodes(c, &inode, 1);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+/**
+ * mctime_update_needed - check if mtime or ctime update is needed.
+ * @inode: the inode to do the check for
+ * @now: current time
+ *
+ * This helper function checks if the inode mtime/ctime should be updated or
+ * not. If current values of the time-stamps are within the UBIFS inode time
+ * granularity, they are not updated. This is an optimization.
+ */
+static inline int mctime_update_needed(const struct inode *inode,
+ const struct timespec *now)
+{
+ if (!timespec_equal(&inode->i_mtime, now) ||
+ !timespec_equal(&inode->i_ctime, now))
+ return 1;
+ return 0;
+}
+
+/**
+ * update_ctime - update mtime and ctime of an inode.
+ * @c: UBIFS file-system description object
+ * @inode: inode to update
+ *
+ * This function updates mtime and ctime of the inode if it is not equivalent to
+ * current time. Returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int update_mctime(struct ubifs_info *c, struct inode *inode)
+{
+ struct timespec now = ubifs_current_time(inode);
+
+ if (mctime_update_needed(inode, &now)) {
+ struct ubifs_budget_req req;
+ int err;
+
+ memset(&req, 0, sizeof(struct ubifs_budget_req));
+ err = ubifs_budget_inode_op(c, inode, &req);
+ if (err)
+ return err;
+
+ inode->i_mtime = inode->i_ctime = now;
+ mark_inode_dirty_sync(inode);
+ mutex_unlock(&ubifs_inode(inode)->budg_mutex);
+ }
+
+ return 0;
+}
+
+static ssize_t ubifs_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ int err;
+ ssize_t ret;
+ struct inode *inode = file->f_mapping->host;
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+
+ err = update_mctime(c, inode);
+ if (err)
+ return err;
+
+ ret = do_sync_write(file, buf, len, ppos);
+ if (ret < 0)
+ return ret;
+
+ if (ret > 0 && IS_SYNC(inode)) {
+ err = ubifs_sync_wbufs_by_inodes(c, &inode, 1);
+ if (err)
+ return err;
+ }
+
+ return ret;
+}
+
+static ssize_t ubifs_aio_write(struct kiocb *iocb, const struct iovec *iov,
+ unsigned long nr_segs, loff_t pos)
+{
+ int err;
+ ssize_t ret;
+ struct inode *inode = iocb->ki_filp->f_mapping->host;
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+
+ err = update_mctime(c, inode);
+ if (err)
+ return err;
+
+ ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
+ if (ret < 0)
+ return ret;
+
+ if (ret > 0 && IS_SYNC(inode)) {
+ err = ubifs_sync_wbufs_by_inodes(c, &inode, 1);
+ if (err)
+ return err;
+ }
+
+ return ret;
+}
+
+static int ubifs_set_page_dirty(struct page *page)
+{
+ int ret;
+
+ ret = __set_page_dirty_nobuffers(page);
+ /*
+ * An attempt to dirty a page without budgeting for it - should not
+ * happen.
+ */
+ ubifs_assert(ret == 0);
+ return ret;
+}
+
+static int ubifs_releasepage(struct page *page, gfp_t unused_gfp_flags)
+{
+ /*
+ * An attempt to release a dirty page without budgeting for it - should
+ * not happen.
+ */
+ if (PageWriteback(page))
+ return 0;
+ ubifs_assert(PagePrivate(page));
+ ubifs_assert(0);
+ ClearPagePrivate(page);
+ ClearPageChecked(page);
+ return 1;
+}
+
+/*
+ * mmap()d file has taken write protection fault and is being made
+ * writable. UBIFS must ensure page is budgeted for.
+ */
+static int ubifs_vm_page_mkwrite(struct vm_area_struct *vma, struct page *page)
+{
+ struct inode *inode = vma->vm_file->f_path.dentry->d_inode;
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ struct timespec now = ubifs_current_time(inode);
+ struct ubifs_budget_req req = { .new_page = 1 };
+ int err, update_time;
+
+ dbg_gen("ino %lu, pg %lu, i_size %lld", inode->i_ino, page->index,
+ i_size_read(inode));
+ ubifs_assert(!(inode->i_sb->s_flags & MS_RDONLY));
+
+ if (unlikely(c->ro_media))
+ return -EROFS;
+
+ /*
+ * We have not locked @page so far so we may budget for changing the
+ * page. Note, we cannot do this after we locked the page, because
+ * budgeting may cause write-back which would cause deadlock.
+ *
+ * At the moment we do not know whether the page is dirty or not, so we
+ * assume that it is not and budget for a new page. We could look at
+ * the @PG_private flag and figure this out, but we may race with write
+ * back and the page state may change by the time we lock it, so this
+ * would need additional care. We do not bother with this at the
+ * moment, although it might be good idea to do. Instead, we allocate
+ * budget for a new page and amend it later on if the page was in fact
+ * dirty.
+ *
+ * The budgeting-related logic of this function is similar to what we
+ * do in 'ubifs_write_begin()' and 'ubifs_write_end()'. Glance there
+ * for more comments.
+ */
+ if (mctime_update_needed(inode, &now)) {
+ /*
+ * We have to change inode time stamp which requires extra
+ * budgeting.
+ */
+ update_time = 1;
+ err = ubifs_budget_inode_op(c, inode, &req);
+ } else {
+ update_time = 0;
+ err = ubifs_budget_space(c, &req);
+ }
+ if (unlikely(err)) {
+ if (err == -ENOSPC)
+ ubifs_warn("out of space for mmapped file "
+ "(inode number %lu)", inode->i_ino);
+ return err;
+ }
+
+ lock_page(page);
+ if (unlikely(page->mapping != inode->i_mapping ||
+ page_offset(page) > i_size_read(inode))) {
+ /* Page got truncated out from underneath us */
+ err = -EINVAL;
+ goto out_unlock;
+ }
+
+ if (PagePrivate(page))
+ ubifs_release_new_page_budget(c);
+ else {
+ if (!PageChecked(page))
+ ubifs_convert_page_budget(c);
+ SetPagePrivate(page);
+ atomic_long_inc(&c->dirty_pg_cnt);
+ __set_page_dirty_nobuffers(page);
+ }
+
+ if (update_time) {
+ inode->i_mtime = inode->i_ctime = now;
+ mark_inode_dirty_sync(inode);
+ mutex_unlock(&ubifs_inode(inode)->budg_mutex);
+ }
+
+ unlock_page(page);
+ return 0;
+
+out_unlock:
+ unlock_page(page);
+ if (update_time)
+ ubifs_cancel_ino_op(c, inode, &req);
+ else
+ ubifs_release_budget(c, &req);
+ return err;
+}
+
+struct vm_operations_struct ubifs_file_vm_ops = {
+ .fault = filemap_fault,
+ .page_mkwrite = ubifs_vm_page_mkwrite,
+};
+
+static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ int err;
+
+ /* 'generic_file_mmap()' takes care of NOMMU case */
+ err = generic_file_mmap(file, vma);
+ if (err)
+ return err;
+ vma->vm_ops = &ubifs_file_vm_ops;
+ return 0;
+}
+
+struct address_space_operations ubifs_file_address_operations = {
+ .readpage = ubifs_readpage,
+ .writepage = ubifs_writepage,
+ .write_begin = ubifs_write_begin,
+ .write_end = ubifs_write_end,
+ .invalidatepage = ubifs_invalidatepage,
+ .set_page_dirty = ubifs_set_page_dirty,
+ .releasepage = ubifs_releasepage,
+};
+
+struct inode_operations ubifs_file_inode_operations = {
+ .setattr = ubifs_setattr,
+ .getattr = ubifs_getattr,
+#ifdef CONFIG_UBIFS_FS_XATTR
+ .setxattr = ubifs_setxattr,
+ .getxattr = ubifs_getxattr,
+ .listxattr = ubifs_listxattr,
+ .removexattr = ubifs_removexattr,
+#endif
+};
+
+struct inode_operations ubifs_symlink_inode_operations = {
+ .readlink = generic_readlink,
+ .follow_link = ubifs_follow_link,
+ .setattr = ubifs_setattr,
+ .getattr = ubifs_getattr,
+};
+
+struct file_operations ubifs_file_operations = {
+ .llseek = generic_file_llseek,
+ .read = do_sync_read,
+ .write = ubifs_write,
+ .aio_read = generic_file_aio_read,
+ .aio_write = ubifs_aio_write,
+ .mmap = ubifs_file_mmap,
+ .fsync = ubifs_fsync,
+ .unlocked_ioctl = ubifs_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = ubifs_compat_ioctl,
+#endif
+};
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/find.c avr32-2.6/fs/ubifs/find.c
--- linux-2.6.25.6/fs/ubifs/find.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/find.c 2008-06-12 15:09:45.364399968 +0200
@@ -0,0 +1,977 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file contains functions for finding LEBs for various purposes e.g.
+ * garbage collection. In general, lprops category heaps and lists are used
+ * for fast access, falling back on scanning the LPT as a last resort.
+ */
+
+#include <linux/sort.h>
+#include "ubifs.h"
+
+/**
+ * struct scan_data - data provided to scan callback functions
+ * @min_space: minimum number of bytes for which to scan
+ * @pick_free: whether it is OK to scan for empty LEBs
+ * @lnum: LEB number found is returned here
+ * @exclude_index: whether to exclude index LEBs
+ */
+struct scan_data {
+ int min_space;
+ int pick_free;
+ int lnum;
+ int exclude_index;
+};
+
+/**
+ * valuable - determine whether LEB properties are valuable.
+ * @c: the UBIFS file-system description object
+ * @lprops: LEB properties
+ *
+ * This function return %1 if the LEB properties should be added to the LEB
+ * properties tree in memory. Otherwise %0 is returned.
+ */
+static int valuable(struct ubifs_info *c, const struct ubifs_lprops *lprops)
+{
+ int n, cat = lprops->flags & LPROPS_CAT_MASK;
+ struct ubifs_lpt_heap *heap;
+
+ switch (cat) {
+ case LPROPS_DIRTY:
+ case LPROPS_DIRTY_IDX:
+ case LPROPS_FREE:
+ heap = &c->lpt_heap[cat - 1];
+ if (heap->cnt < heap->max_cnt)
+ return 1;
+ if (lprops->free + lprops->dirty >= c->dark_wm)
+ return 1;
+ return 0;
+ case LPROPS_EMPTY:
+ n = c->lst.empty_lebs + c->freeable_cnt -
+ c->lst.taken_empty_lebs;
+ if (n < c->lsave_cnt)
+ return 1;
+ return 0;
+ case LPROPS_FREEABLE:
+ return 1;
+ case LPROPS_FRDI_IDX:
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * scan_for_dirty_cb - dirty space scan callback.
+ * @c: the UBIFS file-system description object
+ * @lprops: LEB properties to scan
+ * @in_tree: whether the LEB properties are in main memory
+ * @data: information passed to and from the caller of the scan
+ *
+ * This function returns a code that indicates whether the scan should continue
+ * (%LPT_SCAN_CONTINUE), whether the LEB properties should be added to the tree
+ * in main memory (%LPT_SCAN_ADD), or whether the scan should stop
+ * (%LPT_SCAN_STOP).
+ */
+static int scan_for_dirty_cb(struct ubifs_info *c,
+ const struct ubifs_lprops *lprops, int in_tree,
+ struct scan_data *data)
+{
+ int ret = LPT_SCAN_CONTINUE;
+
+ /* Exclude LEBs that are currently in use */
+ if (lprops->flags & LPROPS_TAKEN)
+ return LPT_SCAN_CONTINUE;
+ /* Determine whether to add these LEB properties to the tree */
+ if (!in_tree && valuable(c, lprops))
+ ret |= LPT_SCAN_ADD;
+ /* Exclude LEBs with too little space */
+ if (lprops->free + lprops->dirty < data->min_space)
+ return ret;
+ /* If specified, exclude index LEBs */
+ if (data->exclude_index && lprops->flags & LPROPS_INDEX)
+ return ret;
+ /* If specified, exclude empty or freeable LEBs */
+ if (lprops->free + lprops->dirty == c->leb_size) {
+ if (!data->pick_free)
+ return ret;
+ /* Exclude LEBs with too little dirty space (unless it is empty) */
+ } else if (lprops->dirty < c->dead_wm)
+ return ret;
+ /* Finally we found space */
+ data->lnum = lprops->lnum;
+ return LPT_SCAN_ADD | LPT_SCAN_STOP;
+}
+
+/**
+ * scan_for_dirty - find a data LEB with free space.
+ * @c: the UBIFS file-system description object
+ * @min_space: minimum amount free plus dirty space the returned LEB has to
+ * have
+ * @pick_free: if it is OK to return a free or freeable LEB
+ * @exclude_index: whether to exclude index LEBs
+ *
+ * This function returns a pointer to the LEB properties found or a negative
+ * error code.
+ */
+static const struct ubifs_lprops *scan_for_dirty(struct ubifs_info *c,
+ int min_space, int pick_free,
+ int exclude_index)
+{
+ const struct ubifs_lprops *lprops;
+ struct ubifs_lpt_heap *heap;
+ struct scan_data data;
+ int err, i;
+
+ /* There may be an LEB with enough dirty space on the free heap */
+ heap = &c->lpt_heap[LPROPS_FREE - 1];
+ for (i = 0; i < heap->cnt; i++) {
+ lprops = heap->arr[i];
+ if (lprops->free + lprops->dirty < min_space)
+ continue;
+ if (lprops->dirty < c->dead_wm)
+ continue;
+ return lprops;
+ }
+ /*
+ * A LEB may have fallen off of the bottom of the dirty heap, and ended
+ * up as uncategorized even though it has enough dirty space for us now,
+ * so check the uncategorized list. N.B. neither empty nor freeable LEBs
+ * can end up as uncategorized because they are kept on lists not
+ * finite-sized heaps.
+ */
+ list_for_each_entry(lprops, &c->uncat_list, list) {
+ if (lprops->flags & LPROPS_TAKEN)
+ continue;
+ if (lprops->free + lprops->dirty < min_space)
+ continue;
+ if (exclude_index && (lprops->flags & LPROPS_INDEX))
+ continue;
+ if (lprops->dirty < c->dead_wm)
+ continue;
+ return lprops;
+ }
+ /* We have looked everywhere in main memory, now scan the flash */
+ if (c->pnodes_have >= c->pnode_cnt)
+ /* All pnodes are in memory, so skip scan */
+ return ERR_PTR(-ENOSPC);
+ data.min_space = min_space;
+ data.pick_free = pick_free;
+ data.lnum = -1;
+ data.exclude_index = exclude_index;
+ err = ubifs_lpt_scan_nolock(c, -1, c->lscan_lnum,
+ (ubifs_lpt_scan_callback)scan_for_dirty_cb,
+ &data);
+ if (err)
+ return ERR_PTR(err);
+ ubifs_assert(data.lnum >= c->main_first && data.lnum < c->leb_cnt);
+ c->lscan_lnum = data.lnum;
+ lprops = ubifs_lpt_lookup_dirty(c, data.lnum);
+ if (IS_ERR(lprops))
+ return lprops;
+ ubifs_assert(lprops->lnum == data.lnum);
+ ubifs_assert(lprops->free + lprops->dirty >= min_space);
+ ubifs_assert(lprops->dirty >= c->dead_wm ||
+ (pick_free &&
+ lprops->free + lprops->dirty == c->leb_size));
+ ubifs_assert(!(lprops->flags & LPROPS_TAKEN));
+ ubifs_assert(!(lprops->flags & LPROPS_INDEX));
+ return lprops;
+}
+
+/**
+ * ubifs_find_dirty_leb - find a dirty LEB for the Garbage Collector.
+ * @c: the UBIFS file-system description object
+ * @ret_lp: LEB properties are returned here on exit
+ * @min_space: minimum amount free plus dirty space the returned LEB has to
+ * have
+ * @pick_free: controls whether it is OK to pick empty or index LEBs
+ *
+ * This function tries to find a dirty logical eraseblock which has at least
+ * @min_space free and dirty space. It prefers to take an LEB from the dirty or
+ * dirty index heap, and it falls-back to LPT scanning if the heaps are empty
+ * or do not have an LEB which satisfies the @min_space criteria.
+ *
+ * Note:
+ * o LEBs which have less than dead watermark of dirty space are never picked
+ * by this function;
+ *
+ * Returns zero and the LEB properties of
+ * found dirty LEB in case of success, %-ENOSPC if no dirty LEB was found and a
+ * negative error code in case of other failures. The returned LEB is marked as
+ * "taken".
+ *
+ * The additional @pick_free argument controls if this function has to return a
+ * free or freeable LEB if one is present. For example, GC must to set it to %1,
+ * when called from the journal space reservation function, because the
+ * appearance of free space may coincide with the loss of enough dirty space
+ * for GC to succeed anyway.
+ *
+ * In contrast, if the Garbage Collector is called from budgeting, it should
+ * just make free space, not return LEBs which are already free or freeable.
+ *
+ * In addition @pick_free is set to %2 by the recovery process in order to
+ * recover gc_lnum in which case an index LEB must not be returned.
+ */
+int ubifs_find_dirty_leb(struct ubifs_info *c, struct ubifs_lprops *ret_lp,
+ int min_space, int pick_free)
+{
+ int err = 0, sum, exclude_index = pick_free == 2 ? 1 : 0;
+ const struct ubifs_lprops *lp = NULL, *idx_lp = NULL;
+ struct ubifs_lpt_heap *heap, *idx_heap;
+
+ ubifs_get_lprops(c);
+
+ if (pick_free) {
+ int lebs, rsvd_idx_lebs = 0;
+
+ spin_lock(&c->space_lock);
+ lebs = c->lst.empty_lebs;
+ lebs += c->freeable_cnt - c->lst.taken_empty_lebs;
+
+ /*
+ * Note, the index may consume more LEBs than have been reserved
+ * for it. It is OK because it might be consolidated by GC.
+ * But if the index takes fewer LEBs than it is reserved for it,
+ * this function must avoid picking those reserved LEBs.
+ */
+ if (c->min_idx_lebs >= c->lst.idx_lebs) {
+ rsvd_idx_lebs = c->min_idx_lebs - c->lst.idx_lebs;
+ exclude_index = 1;
+ }
+ spin_unlock(&c->space_lock);
+
+ /* Check if there are enough free LEBs for the index */
+ if (rsvd_idx_lebs < lebs) {
+ /* OK, try to find an empty LEB */
+ lp = ubifs_fast_find_empty(c);
+ if (lp)
+ goto found;
+
+ /* Or a freeable LEB */
+ lp = ubifs_fast_find_freeable(c);
+ if (lp)
+ goto found;
+ } else
+ /*
+ * We cannot pick free/freeable LEBs in the below code.
+ */
+ pick_free = 0;
+ } else {
+ spin_lock(&c->space_lock);
+ exclude_index = (c->min_idx_lebs >= c->lst.idx_lebs);
+ spin_unlock(&c->space_lock);
+ }
+
+ /* Look on the dirty and dirty index heaps */
+ heap = &c->lpt_heap[LPROPS_DIRTY - 1];
+ idx_heap = &c->lpt_heap[LPROPS_DIRTY_IDX - 1];
+
+ if (idx_heap->cnt && !exclude_index) {
+ idx_lp = idx_heap->arr[0];
+ sum = idx_lp->free + idx_lp->dirty;
+ /*
+ * Since we reserve twice as more space for the index than it
+ * actually takes, it does not make sense to pick indexing LEBs
+ * with less than half LEB of dirty space.
+ */
+ if (sum < min_space || sum < c->half_leb_size)
+ idx_lp = NULL;
+ }
+
+ if (heap->cnt) {
+ lp = heap->arr[0];
+ if (lp->dirty + lp->free < min_space)
+ lp = NULL;
+ }
+
+ /* Pick the LEB with most space */
+ if (idx_lp && lp) {
+ if (idx_lp->free + idx_lp->dirty >= lp->free + lp->dirty)
+ lp = idx_lp;
+ } else if (idx_lp && !lp)
+ lp = idx_lp;
+
+ if (lp) {
+ ubifs_assert(lp->dirty >= c->dead_wm);
+ goto found;
+ }
+
+ /* Did not find a dirty LEB on the dirty heaps, have to scan */
+ dbg_find("scanning LPT for a dirty LEB");
+ lp = scan_for_dirty(c, min_space, pick_free, exclude_index);
+ if (IS_ERR(lp)) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+ ubifs_assert(lp->dirty >= c->dead_wm ||
+ (pick_free && lp->free + lp->dirty == c->leb_size));
+
+found:
+ dbg_find("found LEB %d, free %d, dirty %d, flags %#x",
+ lp->lnum, lp->free, lp->dirty, lp->flags);
+
+ lp = ubifs_change_lp(c, lp, LPROPS_NC, LPROPS_NC,
+ lp->flags | LPROPS_TAKEN, 0);
+ if (IS_ERR(lp)) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+
+ memcpy(ret_lp, lp, sizeof(struct ubifs_lprops));
+
+out:
+ ubifs_release_lprops(c);
+ return err;
+}
+
+/**
+ * scan_for_free_cb - free space scan callback.
+ * @c: the UBIFS file-system description object
+ * @lprops: LEB properties to scan
+ * @in_tree: whether the LEB properties are in main memory
+ * @data: information passed to and from the caller of the scan
+ *
+ * This function returns a code that indicates whether the scan should continue
+ * (%LPT_SCAN_CONTINUE), whether the LEB properties should be added to the tree
+ * in main memory (%LPT_SCAN_ADD), or whether the scan should stop
+ * (%LPT_SCAN_STOP).
+ */
+static int scan_for_free_cb(struct ubifs_info *c,
+ const struct ubifs_lprops *lprops, int in_tree,
+ struct scan_data *data)
+{
+ int ret = LPT_SCAN_CONTINUE;
+
+ /* Exclude LEBs that are currently in use */
+ if (lprops->flags & LPROPS_TAKEN)
+ return LPT_SCAN_CONTINUE;
+ /* Determine whether to add these LEB properties to the tree */
+ if (!in_tree && valuable(c, lprops))
+ ret |= LPT_SCAN_ADD;
+ /* Exclude index LEBs */
+ if (lprops->flags & LPROPS_INDEX)
+ return ret;
+ /* Exclude LEBs with too little space */
+ if (lprops->free < data->min_space)
+ return ret;
+ /* If specified, exclude empty LEBs */
+ if (!data->pick_free && lprops->free == c->leb_size)
+ return ret;
+ /*
+ * LEBs that have only free and dirty space must not be allocated
+ * because they may have been unmapped already or they may have data
+ * that is obsolete only because of nodes that are still sitting in a
+ * wbuf.
+ */
+ if (lprops->free + lprops->dirty == c->leb_size && lprops->dirty > 0)
+ return ret;
+ /* Finally we found space */
+ data->lnum = lprops->lnum;
+ return LPT_SCAN_ADD | LPT_SCAN_STOP;
+}
+
+/**
+ * do_find_free_space - find a data LEB with free space.
+ * @c: the UBIFS file-system description object
+ * @min_space: minimum amount of free space required
+ * @pick_free: whether it is OK to scan for empty LEBs
+ * @squeeze: whether to try to find space in a non-empty LEB first
+ *
+ * This function returns a pointer to the LEB properties found or a negative
+ * error code.
+ */
+static
+const struct ubifs_lprops *do_find_free_space(struct ubifs_info *c,
+ int min_space, int pick_free,
+ int squeeze)
+{
+ const struct ubifs_lprops *lprops;
+ struct ubifs_lpt_heap *heap;
+ struct scan_data data;
+ int err, i;
+
+ if (squeeze) {
+ lprops = ubifs_fast_find_free(c);
+ if (lprops && lprops->free >= min_space)
+ return lprops;
+ }
+ if (pick_free) {
+ lprops = ubifs_fast_find_empty(c);
+ if (lprops)
+ return lprops;
+ }
+ if (!squeeze) {
+ lprops = ubifs_fast_find_free(c);
+ if (lprops && lprops->free >= min_space)
+ return lprops;
+ }
+ /* There may be an LEB with enough free space on the dirty heap */
+ heap = &c->lpt_heap[LPROPS_DIRTY - 1];
+ for (i = 0; i < heap->cnt; i++) {
+ lprops = heap->arr[i];
+ if (lprops->free >= min_space)
+ return lprops;
+ }
+ /*
+ * A LEB may have fallen off of the bottom of the free heap, and ended
+ * up as uncategorized even though it has enough free space for us now,
+ * so check the uncategorized list. N.B. neither empty nor freeable LEBs
+ * can end up as uncategorized because they are kept on lists not
+ * finite-sized heaps.
+ */
+ list_for_each_entry(lprops, &c->uncat_list, list) {
+ if (lprops->flags & LPROPS_TAKEN)
+ continue;
+ if (lprops->flags & LPROPS_INDEX)
+ continue;
+ if (lprops->free >= min_space)
+ return lprops;
+ }
+ /* We have looked everywhere in main memory, now scan the flash */
+ if (c->pnodes_have >= c->pnode_cnt)
+ /* All pnodes are in memory, so skip scan */
+ return ERR_PTR(-ENOSPC);
+ data.min_space = min_space;
+ data.pick_free = pick_free;
+ data.lnum = -1;
+ err = ubifs_lpt_scan_nolock(c, -1, c->lscan_lnum,
+ (ubifs_lpt_scan_callback)scan_for_free_cb,
+ &data);
+ if (err)
+ return ERR_PTR(err);
+ ubifs_assert(data.lnum >= c->main_first && data.lnum < c->leb_cnt);
+ c->lscan_lnum = data.lnum;
+ lprops = ubifs_lpt_lookup_dirty(c, data.lnum);
+ if (IS_ERR(lprops))
+ return lprops;
+ ubifs_assert(lprops->lnum == data.lnum);
+ ubifs_assert(lprops->free >= min_space);
+ ubifs_assert(!(lprops->flags & LPROPS_TAKEN));
+ ubifs_assert(!(lprops->flags & LPROPS_INDEX));
+ return lprops;
+}
+
+/**
+ * ubifs_find_free_space - find a data LEB with free space.
+ * @c: the UBIFS file-system description object
+ * @min_space: minimum amount of required free space
+ * @free: contains amount of free space in the LEB on exit
+ * @squeeze: whether to try to find space in a non-empty LEB first
+ *
+ * This function looks for an LEB with at least @min_space bytes of free space.
+ * It tries to find an empty LEB if possible. If no empty LEBs are available,
+ * this function searches for a non-empty data LEB. The returned LEB is marked
+ * as "taken".
+ *
+ * This function returns found LEB number in case of success, %-ENOSPC if it
+ * failed to find a LEB with @min_space bytes of free space and other a negative
+ * error codes in case of failure.
+ */
+int ubifs_find_free_space(struct ubifs_info *c, int min_space, int *free,
+ int squeeze)
+{
+ const struct ubifs_lprops *lprops;
+ int lebs, rsvd_idx_lebs, pick_free = 0, err, lnum, flags;
+
+ dbg_find("min_space %d", min_space);
+ ubifs_assert(min_space > 0 && min_space <= c->dark_wm);
+
+ ubifs_get_lprops(c);
+
+ /* Check if there are enough empty LEBs for commit */
+ spin_lock(&c->space_lock);
+ if (c->min_idx_lebs > c->lst.idx_lebs)
+ rsvd_idx_lebs = c->min_idx_lebs - c->lst.idx_lebs;
+ else
+ rsvd_idx_lebs = 0;
+ lebs = c->lst.empty_lebs + c->freeable_cnt + c->idx_gc_cnt -
+ c->lst.taken_empty_lebs;
+ ubifs_assert(lebs + c->lst.idx_lebs >= c->min_idx_lebs);
+ if (rsvd_idx_lebs < lebs)
+ /*
+ * OK to allocate an empty LEB, but we still don't want to go
+ * looking for one if there aren't any.
+ */
+ if (c->lst.empty_lebs - c->lst.taken_empty_lebs > 0) {
+ pick_free = 1;
+ /*
+ * Because we release the space lock, we must account
+ * for this allocation here. After the LEB properties
+ * flags have been updated, we subtract one. Note, the
+ * result of this is that lprops also decreases
+ * @taken_empty_lebs in 'ubifs_change_lp()', so it is
+ * off by one for a short period of time which may
+ * introduce a small disturbance to budgeting
+ * calculations, but this is harmless because at the
+ * worst case this would make the budgeting subsystem
+ * be more pessimistic than needed.
+ *
+ * Fundamentally, this is about serialization of the
+ * budgeting and lprops subsystems. We could make the
+ * @space_lock a mutex and avoid dropping it before
+ * calling 'ubifs_change_lp()', but mutex is more
+ * heavy-weight, and we want budgeting to be as fast as
+ * possible.
+ */
+ c->lst.taken_empty_lebs += 1;
+ }
+ spin_unlock(&c->space_lock);
+
+ lprops = do_find_free_space(c, min_space, pick_free, squeeze);
+ if (IS_ERR(lprops)) {
+ err = PTR_ERR(lprops);
+ goto out;
+ }
+
+ lnum = lprops->lnum;
+ flags = lprops->flags | LPROPS_TAKEN;
+
+ lprops = ubifs_change_lp(c, lprops, LPROPS_NC, LPROPS_NC, flags, 0);
+ if (IS_ERR(lprops)) {
+ err = PTR_ERR(lprops);
+ goto out;
+ }
+
+ if (pick_free) {
+ spin_lock(&c->space_lock);
+ c->lst.taken_empty_lebs -= 1;
+ spin_unlock(&c->space_lock);
+ }
+
+ *free = lprops->free;
+ ubifs_release_lprops(c);
+
+ if (*free == c->leb_size) {
+ /*
+ * Ensure that empty LEBs have been unmapped. They may not have
+ * been, for example, because of an unclean unmount. Also
+ * LEBs that were freeable LEBs (free + dirty == leb_size) will
+ * not have been unmapped.
+ */
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ }
+
+ dbg_find("found LEB %d, free %d", lnum, *free);
+ ubifs_assert(*free >= min_space);
+ return lnum;
+
+out:
+ if (pick_free) {
+ spin_lock(&c->space_lock);
+ c->lst.taken_empty_lebs -= 1;
+ spin_unlock(&c->space_lock);
+ }
+ ubifs_release_lprops(c);
+ return err;
+}
+
+/**
+ * scan_for_idx_cb - callback used by the scan for a free LEB for the index.
+ * @c: the UBIFS file-system description object
+ * @lprops: LEB properties to scan
+ * @in_tree: whether the LEB properties are in main memory
+ * @data: information passed to and from the caller of the scan
+ *
+ * This function returns a code that indicates whether the scan should continue
+ * (%LPT_SCAN_CONTINUE), whether the LEB properties should be added to the tree
+ * in main memory (%LPT_SCAN_ADD), or whether the scan should stop
+ * (%LPT_SCAN_STOP).
+ */
+static int scan_for_idx_cb(struct ubifs_info *c,
+ const struct ubifs_lprops *lprops, int in_tree,
+ struct scan_data *data)
+{
+ int ret = LPT_SCAN_CONTINUE;
+
+ /* Exclude LEBs that are currently in use */
+ if (lprops->flags & LPROPS_TAKEN)
+ return LPT_SCAN_CONTINUE;
+ /* Determine whether to add these LEB properties to the tree */
+ if (!in_tree && valuable(c, lprops))
+ ret |= LPT_SCAN_ADD;
+ /* Exclude index LEBS */
+ if (lprops->flags & LPROPS_INDEX)
+ return ret;
+ /* Exclude LEBs that cannot be made empty */
+ if (lprops->free + lprops->dirty != c->leb_size)
+ return ret;
+ /*
+ * We are allocating for the index so it is safe to allocate LEBs with
+ * only free and dirty space, because write buffers are sync'd at commit
+ * start.
+ */
+ data->lnum = lprops->lnum;
+ return LPT_SCAN_ADD | LPT_SCAN_STOP;
+}
+
+/**
+ * scan_for_leb_for_idx - scan for a free LEB for the index.
+ * @c: the UBIFS file-system description object
+ */
+static const struct ubifs_lprops *scan_for_leb_for_idx(struct ubifs_info *c)
+{
+ struct ubifs_lprops *lprops;
+ struct scan_data data;
+ int err;
+
+ data.lnum = -1;
+ err = ubifs_lpt_scan_nolock(c, -1, c->lscan_lnum,
+ (ubifs_lpt_scan_callback)scan_for_idx_cb,
+ &data);
+ if (err)
+ return ERR_PTR(err);
+ ubifs_assert(data.lnum >= c->main_first && data.lnum < c->leb_cnt);
+ c->lscan_lnum = data.lnum;
+ lprops = ubifs_lpt_lookup_dirty(c, data.lnum);
+ if (IS_ERR(lprops))
+ return lprops;
+ ubifs_assert(lprops->lnum == data.lnum);
+ ubifs_assert(lprops->free + lprops->dirty == c->leb_size);
+ ubifs_assert(!(lprops->flags & LPROPS_TAKEN));
+ ubifs_assert(!(lprops->flags & LPROPS_INDEX));
+ return lprops;
+}
+
+/**
+ * ubifs_find_free_leb_for_idx - find a free LEB for the index.
+ * @c: the UBIFS file-system description object
+ *
+ * This function looks for a free LEB and returns that LEB number. The returned
+ * LEB is marked as "taken", "index".
+ *
+ * Only empty LEBs are allocated. This is for two reasons. First, the commit
+ * calculates the number of LEBs to allocate based on the assumption that they
+ * will be empty. Secondly, free space at the end of an index LEB is not
+ * guaranteed to be empty because it may have been used by the in-the-gaps
+ * method prior to an unclean unmount.
+ *
+ * If no LEB is found %-ENOSPC is returned. For other failures another negative
+ * error code is returned.
+ */
+int ubifs_find_free_leb_for_idx(struct ubifs_info *c)
+{
+ const struct ubifs_lprops *lprops;
+ int lnum = -1, err, flags;
+
+ ubifs_get_lprops(c);
+
+ lprops = ubifs_fast_find_empty(c);
+ if (!lprops) {
+ lprops = ubifs_fast_find_freeable(c);
+ if (!lprops) {
+ ubifs_assert(c->freeable_cnt == 0);
+ if (c->lst.empty_lebs - c->lst.taken_empty_lebs > 0) {
+ lprops = scan_for_leb_for_idx(c);
+ if (IS_ERR(lprops)) {
+ err = PTR_ERR(lprops);
+ goto out;
+ }
+ }
+ }
+ }
+
+ if (!lprops) {
+ err = -ENOSPC;
+ goto out;
+ }
+
+ lnum = lprops->lnum;
+
+ dbg_find("found LEB %d, free %d, dirty %d, flags %#x",
+ lnum, lprops->free, lprops->dirty, lprops->flags);
+
+ flags = lprops->flags | LPROPS_TAKEN | LPROPS_INDEX;
+ lprops = ubifs_change_lp(c, lprops, c->leb_size, 0, flags, 0);
+ if (IS_ERR(lprops)) {
+ err = PTR_ERR(lprops);
+ goto out;
+ }
+
+ ubifs_release_lprops(c);
+
+ /*
+ * Ensure that empty LEBs have been unmapped. They may not have been,
+ * for example, because of an unclean unmount. Also LEBs that were
+ * freeable LEBs (free + dirty == leb_size) will not have been unmapped.
+ */
+ err = ubifs_leb_unmap(c, lnum);
+ if (err) {
+ ubifs_change_one_lp(c, lnum, LPROPS_NC, LPROPS_NC, 0,
+ LPROPS_TAKEN | LPROPS_INDEX, 0);
+ return err;
+ }
+
+ return lnum;
+
+out:
+ ubifs_release_lprops(c);
+ return err;
+}
+
+static int cmp_dirty_idx(const struct ubifs_lprops **a,
+ const struct ubifs_lprops **b)
+{
+ const struct ubifs_lprops *lpa = *a;
+ const struct ubifs_lprops *lpb = *b;
+
+ return lpa->dirty + lpa->free - lpb->dirty - lpb->free;
+}
+
+static void swap_dirty_idx(struct ubifs_lprops **a, struct ubifs_lprops **b,
+ int size)
+{
+ struct ubifs_lprops *t = *a;
+
+ *a = *b;
+ *b = t;
+}
+
+/**
+ * ubifs_save_dirty_idx_lnums - save an array of the most dirty index LEB nos.
+ * @c: the UBIFS file-system description object
+ *
+ * This function is called each commit to create an array of LEB numbers of
+ * dirty index LEBs sorted in order of dirty and free space. This is used by
+ * the in-the-gaps method of TNC commit.
+ */
+int ubifs_save_dirty_idx_lnums(struct ubifs_info *c)
+{
+ int i;
+
+ ubifs_get_lprops(c);
+ /* Copy the LPROPS_DIRTY_IDX heap */
+ c->dirty_idx.cnt = c->lpt_heap[LPROPS_DIRTY_IDX - 1].cnt;
+ memcpy(c->dirty_idx.arr, c->lpt_heap[LPROPS_DIRTY_IDX - 1].arr,
+ sizeof(void *) * c->dirty_idx.cnt);
+ /* Sort it so that the dirtiest is now at the end */
+ sort(c->dirty_idx.arr, c->dirty_idx.cnt, sizeof(void *),
+ (int (*)(const void *, const void *))cmp_dirty_idx,
+ (void (*)(void *, void *, int))swap_dirty_idx);
+ dbg_find("found %d dirty index LEBs", c->dirty_idx.cnt);
+ if (c->dirty_idx.cnt)
+ dbg_find("dirtiest index LEB is %d with dirty %d and free %d",
+ c->dirty_idx.arr[c->dirty_idx.cnt - 1]->lnum,
+ c->dirty_idx.arr[c->dirty_idx.cnt - 1]->dirty,
+ c->dirty_idx.arr[c->dirty_idx.cnt - 1]->free);
+ /* Replace the lprops pointers with LEB numbers */
+ for (i = 0; i < c->dirty_idx.cnt; i++)
+ c->dirty_idx.arr[i] = (void *)(size_t)c->dirty_idx.arr[i]->lnum;
+ ubifs_release_lprops(c);
+ return 0;
+}
+
+/**
+ * scan_dirty_idx_cb - callback used by the scan for a dirty index LEB.
+ * @c: the UBIFS file-system description object
+ * @lprops: LEB properties to scan
+ * @in_tree: whether the LEB properties are in main memory
+ * @data: information passed to and from the caller of the scan
+ *
+ * This function returns a code that indicates whether the scan should continue
+ * (%LPT_SCAN_CONTINUE), whether the LEB properties should be added to the tree
+ * in main memory (%LPT_SCAN_ADD), or whether the scan should stop
+ * (%LPT_SCAN_STOP).
+ */
+static int scan_dirty_idx_cb(struct ubifs_info *c,
+ const struct ubifs_lprops *lprops, int in_tree,
+ struct scan_data *data)
+{
+ int ret = LPT_SCAN_CONTINUE;
+
+ /* Exclude LEBs that are currently in use */
+ if (lprops->flags & LPROPS_TAKEN)
+ return LPT_SCAN_CONTINUE;
+ /* Determine whether to add these LEB properties to the tree */
+ if (!in_tree && valuable(c, lprops))
+ ret |= LPT_SCAN_ADD;
+ /* Exclude non-index LEBs */
+ if (!(lprops->flags & LPROPS_INDEX))
+ return ret;
+ /* Exclude LEBs with too little space */
+ if (lprops->free + lprops->dirty < c->min_idx_node_sz)
+ return ret;
+ /* Finally we found space */
+ data->lnum = lprops->lnum;
+ return LPT_SCAN_ADD | LPT_SCAN_STOP;
+}
+
+/**
+ * find_dirty_idx_leb - find a dirty index LEB.
+ * @c: the UBIFS file-system description object
+ *
+ * This function returns LEB number upon success and a negative error code upon
+ * failure. In particular, -ENOSPC is returned if a dirty index LEB is not
+ * found.
+ *
+ * Note that this function scans the entire LPT but it is called very rarely.
+ */
+static int find_dirty_idx_leb(struct ubifs_info *c)
+{
+ const struct ubifs_lprops *lprops;
+ struct ubifs_lpt_heap *heap;
+ struct scan_data data;
+ int err, i, ret;
+
+ /* Check all structures in memory first */
+ data.lnum = -1;
+ heap = &c->lpt_heap[LPROPS_DIRTY_IDX - 1];
+ for (i = 0; i < heap->cnt; i++) {
+ lprops = heap->arr[i];
+ ret = scan_dirty_idx_cb(c, lprops, 1, &data);
+ if (ret & LPT_SCAN_STOP)
+ goto found;
+ }
+ list_for_each_entry(lprops, &c->frdi_idx_list, list) {
+ ret = scan_dirty_idx_cb(c, lprops, 1, &data);
+ if (ret & LPT_SCAN_STOP)
+ goto found;
+ }
+ list_for_each_entry(lprops, &c->uncat_list, list) {
+ ret = scan_dirty_idx_cb(c, lprops, 1, &data);
+ if (ret & LPT_SCAN_STOP)
+ goto found;
+ }
+ if (c->pnodes_have >= c->pnode_cnt)
+ /* All pnodes are in memory, so skip scan */
+ return -ENOSPC;
+ err = ubifs_lpt_scan_nolock(c, -1, c->lscan_lnum,
+ (ubifs_lpt_scan_callback)scan_dirty_idx_cb,
+ &data);
+ if (err)
+ return err;
+found:
+ ubifs_assert(data.lnum >= c->main_first && data.lnum < c->leb_cnt);
+ c->lscan_lnum = data.lnum;
+ lprops = ubifs_lpt_lookup_dirty(c, data.lnum);
+ if (IS_ERR(lprops))
+ return PTR_ERR(lprops);
+ ubifs_assert(lprops->lnum == data.lnum);
+ ubifs_assert(lprops->free + lprops->dirty >= c->min_idx_node_sz);
+ ubifs_assert(!(lprops->flags & LPROPS_TAKEN));
+ ubifs_assert((lprops->flags & LPROPS_INDEX));
+
+ dbg_find("found dirty LEB %d, free %d, dirty %d, flags %#x",
+ lprops->lnum, lprops->free, lprops->dirty, lprops->flags);
+
+ lprops = ubifs_change_lp(c, lprops, LPROPS_NC, LPROPS_NC,
+ lprops->flags | LPROPS_TAKEN, 0);
+ if (IS_ERR(lprops))
+ return PTR_ERR(lprops);
+
+ return lprops->lnum;
+}
+
+/**
+ * get_idx_gc_leb - try to get a LEB number from trivial GC.
+ * @c: the UBIFS file-system description object
+ */
+static int get_idx_gc_leb(struct ubifs_info *c)
+{
+ const struct ubifs_lprops *lp;
+ int err, lnum;
+
+ err = ubifs_get_idx_gc_leb(c);
+ if (err < 0)
+ return err;
+ lnum = err;
+ /*
+ * The LEB was due to be unmapped after the commit but
+ * it is needed now for this commit.
+ */
+ lp = ubifs_lpt_lookup_dirty(c, lnum);
+ if (unlikely(IS_ERR(lp)))
+ return PTR_ERR(lp);
+ lp = ubifs_change_lp(c, lp, LPROPS_NC, LPROPS_NC,
+ lp->flags | LPROPS_INDEX, -1);
+ if (unlikely(IS_ERR(lp)))
+ return PTR_ERR(lp);
+ dbg_find("LEB %d, dirty %d and free %d flags %#x",
+ lp->lnum, lp->dirty, lp->free, lp->flags);
+ return lnum;
+}
+
+/**
+ * find_dirtiest_idx_leb - find dirtiest index LEB from dirtiest array.
+ * @c: the UBIFS file-system description object
+ */
+static int find_dirtiest_idx_leb(struct ubifs_info *c)
+{
+ const struct ubifs_lprops *lp;
+ int lnum;
+
+ while (1) {
+ if (!c->dirty_idx.cnt)
+ return -ENOSPC;
+ /* The lprops pointers were replaced by LEB numbers */
+ lnum = (size_t)c->dirty_idx.arr[--c->dirty_idx.cnt];
+ lp = ubifs_lpt_lookup(c, lnum);
+ if (IS_ERR(lp))
+ return PTR_ERR(lp);
+ if ((lp->flags & LPROPS_TAKEN) || !(lp->flags & LPROPS_INDEX))
+ continue;
+ lp = ubifs_change_lp(c, lp, LPROPS_NC, LPROPS_NC,
+ lp->flags | LPROPS_TAKEN, 0);
+ if (IS_ERR(lp))
+ return PTR_ERR(lp);
+ break;
+ }
+ dbg_find("LEB %d, dirty %d and free %d flags %#x", lp->lnum, lp->dirty,
+ lp->free, lp->flags);
+ ubifs_assert(lp->flags | LPROPS_TAKEN);
+ ubifs_assert(lp->flags | LPROPS_INDEX);
+ return lnum;
+}
+
+/**
+ * ubifs_find_dirty_idx_leb - try to find dirtiest index LEB as at last commit.
+ * @c: the UBIFS file-system description object
+ *
+ * This function attempts to find an untaken index LEB with the most free and
+ * dirty space that can be used without overwriting index nodes that were in the
+ * last index committed.
+ */
+int ubifs_find_dirty_idx_leb(struct ubifs_info *c)
+{
+ int err;
+
+ ubifs_get_lprops(c);
+
+ /*
+ * We made an array of the dirtiest index LEB numbers as at the start of
+ * last commit. Try that array first.
+ */
+ err = find_dirtiest_idx_leb(c);
+
+ /* Next try scanning the entire LPT */
+ if (err == -ENOSPC)
+ err = find_dirty_idx_leb(c);
+
+ /* Finally take any index LEBs awaiting trivial GC */
+ if (err == -ENOSPC)
+ err = get_idx_gc_leb(c);
+
+ ubifs_release_lprops(c);
+ return err;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/gc.c avr32-2.6/fs/ubifs/gc.c
--- linux-2.6.25.6/fs/ubifs/gc.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/gc.c 2008-06-12 15:09:45.367815766 +0200
@@ -0,0 +1,762 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file implements garbage collection. The procedure for garbage collection
+ * is different depending on whether a LEB as an index LEB (contains index
+ * nodes) or not. For non-index LEBs, garbage collection finds a LEB which
+ * contains a lot of dirty space (obsolete nodes), and copies the non-obsolete
+ * nodes to the journal, at which point the garbage-collected LEB is free to be
+ * reused. For index LEBs, garbage collection marks the non-obsolete index nodes
+ * dirty in the TNC, and after the next commit, the garbage-collected LEB is
+ * to be reused. Garbage collection will cause the number of dirty index nodes
+ * to grow, however sufficient space is reserved for the index to ensure the
+ * commit will never run out of space.
+ */
+
+#include <linux/pagemap.h>
+#include "ubifs.h"
+
+/*
+ * GC tries to optimize the way it fit nodes to available space, and it sorts
+ * nodes a little. The below constants are watermarks which define "large",
+ * "medium", and "small" nodes.
+ */
+#define MEDIUM_NODE_WM (UBIFS_BLOCK_SIZE / 4)
+#define SMALL_NODE_WM UBIFS_MAX_DENT_NODE_SZ
+
+/*
+ * GC may need to move more then one LEB to make progress. The below constants
+ * define "soft" and "hard" limits on the number of LEBs the garbage collector
+ * may move.
+ */
+#define SOFT_LEBS_LIMIT 4
+#define HARD_LEBS_LIMIT 32
+
+/**
+ * switch_gc_head - switch the garbage collection journal head.
+ * @c: UBIFS file-system description object
+ * @buf: buffer to write
+ * @len: length of the buffer to write
+ * @lnum: LEB number written is returned here
+ * @offs: offset written is returned here
+ *
+ * This function switch the GC head to the next LEB which is reserved in
+ * @c->gc_lnum. Returns %0 in case of success, %-EAGAIN if commit is required,
+ * and other negative error code in case of failures.
+ */
+static int switch_gc_head(struct ubifs_info *c)
+{
+ int err, gc_lnum = c->gc_lnum;
+ struct ubifs_wbuf *wbuf = &c->jheads[GCHD].wbuf;
+
+ ubifs_assert(gc_lnum != -1);
+ dbg_gc("switch GC head from LEB %d:%d to LEB %d (waste %d bytes)",
+ wbuf->lnum, wbuf->offs + wbuf->used, gc_lnum,
+ c->leb_size - wbuf->offs - wbuf->used);
+
+ err = ubifs_wbuf_sync_nolock(wbuf);
+ if (err)
+ return err;
+
+ /*
+ * The GC write-buffer was synchronized, we may safely unmap
+ * 'c->gc_lnum'.
+ */
+ err = ubifs_leb_unmap(c, gc_lnum);
+ if (err)
+ return err;
+
+ err = ubifs_add_bud_to_log(c, GCHD, gc_lnum, 0);
+ if (err)
+ return err;
+
+ c->gc_lnum = -1;
+ err = ubifs_wbuf_seek_nolock(wbuf, gc_lnum, 0, UBI_LONGTERM);
+ return err;
+}
+
+/**
+ * move_nodes - move nodes.
+ * @c: UBIFS file-system description object
+ * @sleb: describes nodes to move
+ *
+ * This function moves valid nodes from data LEB described by @sleb to the GC
+ * journal head. The obsolete nodes are dropped.
+ *
+ * When moving nodes we have to deal with classical bin-packing problem: the
+ * space in the current GC journal head LEB and in @c->gc_lnum are the "bins",
+ * where the nodes in the @sleb->nodes list are the elements which should be
+ * fit optimally to the bins. This function uses the "first fit decreasing"
+ * strategy, although it does not really sort the nodes but just split them on
+ * 3 classes - large, medium, and small, so they are roughly sorted.
+ *
+ * This function returns zero in case of success, %-EAGAIN if commit is
+ * required, and other negative error codes in case of other failures.
+ */
+static int move_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb)
+{
+ struct ubifs_scan_node *snod, *tmp;
+ struct list_head large, medium, small;
+ struct ubifs_wbuf *wbuf = &c->jheads[GCHD].wbuf;
+ int avail, err, min = INT_MAX;
+
+ INIT_LIST_HEAD(&large);
+ INIT_LIST_HEAD(&medium);
+ INIT_LIST_HEAD(&small);
+
+ list_for_each_entry_safe(snod, tmp, &sleb->nodes, list) {
+ struct list_head *lst;
+
+ ubifs_assert(snod->type != UBIFS_IDX_NODE);
+ ubifs_assert(snod->type != UBIFS_REF_NODE);
+ ubifs_assert(snod->type != UBIFS_CS_NODE);
+
+ err = ubifs_tnc_has_node(c, &snod->key, 0, sleb->lnum,
+ snod->offs, 0);
+ if (err < 0)
+ goto out;
+
+ lst = &snod->list;
+ list_del(lst);
+ if (!err) {
+ /* The node is obsolete, remove it from the list */
+ kfree(snod);
+ continue;
+ }
+
+ /*
+ * Sort the list of nodes so that large nodes go first, and
+ * small nodes go last.
+ */
+ if (snod->len > MEDIUM_NODE_WM)
+ list_add(lst, &large);
+ else if (snod->len > SMALL_NODE_WM)
+ list_add(lst, &medium);
+ else
+ list_add(lst, &small);
+
+ /* And find the smallest node */
+ if (snod->len < min)
+ min = snod->len;
+ }
+
+ /*
+ * Join the tree lists so that we'd have one roughly sorted list
+ * ('large' will be the head of the joined list).
+ */
+ list_splice(&medium, large.prev);
+ list_splice(&small, large.prev);
+
+ if (wbuf->lnum == -1) {
+ /*
+ * The GC journal head is not set, because it is the first GC
+ * invocation since mount.
+ */
+ err = switch_gc_head(c);
+ if (err)
+ goto out;
+ }
+
+ /* Write nodes to their new location. Use the first-fit strategy */
+ while (1) {
+ avail = c->leb_size - wbuf->offs - wbuf->used;
+ list_for_each_entry_safe(snod, tmp, &large, list) {
+ int new_lnum, new_offs;
+
+ if (avail < min)
+ break;
+
+ if (snod->len > avail)
+ /* This node does not fit */
+ continue;
+
+ cond_resched();
+
+ new_lnum = wbuf->lnum;
+ new_offs = wbuf->offs + wbuf->used;
+ err = ubifs_wbuf_write_nolock(wbuf, snod->node,
+ snod->len);
+
+ err = ubifs_tnc_replace(c, &snod->key, sleb->lnum,
+ snod->offs, new_lnum, new_offs,
+ snod->len);
+ if (err)
+ goto out;
+
+ avail = c->leb_size - wbuf->offs - wbuf->used;
+ list_del(&snod->list);
+ kfree(snod);
+ }
+
+ if (list_empty(&large))
+ break;
+
+ /*
+ * Waste the rest of the space in the LEB and switch to the
+ * next LEB.
+ */
+ err = switch_gc_head(c);
+ if (err)
+ goto out;
+ }
+
+ return 0;
+
+out:
+ list_for_each_entry_safe(snod, tmp, &large, list) {
+ list_del(&snod->list);
+ kfree(snod);
+ }
+ return err;
+}
+
+/**
+ * gc_sync_wbufs - sync write-buffers for GC.
+ * @c: UBIFS file-system description object
+ *
+ * We must guarantee that obsoleting nodes are on flash. Unfortunately they may
+ * be in a write-buffer instead. That is, a node could be written to a
+ * write-buffer, obsoleting another node in a LEB that is GC'd. If that LEB is
+ * erased before the write-buffer is sync'd and then there is an unclean
+ * unmount, then an existing node is lost. To avoid this, we sync all
+ * write-buffers.
+ *
+ * This function returns %0 on success or a negative error code on failure.
+ */
+static int gc_sync_wbufs(struct ubifs_info *c)
+{
+ int err, i;
+
+ for (i = 0; i < c->jhead_cnt; i++) {
+ if (i == GCHD)
+ continue;
+ err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
+ if (err)
+ return err;
+ }
+ return 0;
+}
+
+/**
+ * ubifs_garbage_collect_leb - garbage-collect a logical eraseblock.
+ * @c: UBIFS file-system description object
+ * @lp: describes the LEB to garbage collect
+ *
+ * This function garbage-collects an LEB and returns one of the @LEB_FREED,
+ * @LEB_RETAINED, etc positive codes in case of success, %-EAGAIN if commit is
+ * required, and other negative error codes in case of failures.
+ */
+int ubifs_garbage_collect_leb(struct ubifs_info *c, struct ubifs_lprops *lp)
+{
+ struct ubifs_scan_leb *sleb;
+ struct ubifs_scan_node *snod;
+ struct ubifs_wbuf *wbuf = &c->jheads[GCHD].wbuf;
+ int err = 0, lnum = lp->lnum;
+
+ ubifs_assert(c->gc_lnum != -1 || wbuf->offs + wbuf->used == 0 ||
+ c->need_recovery);
+ ubifs_assert(c->gc_lnum != lnum);
+ ubifs_assert(wbuf->lnum != lnum);
+
+ /*
+ * We scan the entire LEB even though we only really need to scan up to
+ * (c->leb_size - lp->free).
+ */
+ sleb = ubifs_scan(c, lnum, 0, c->sbuf);
+ if (IS_ERR(sleb))
+ return PTR_ERR(sleb);
+
+ ubifs_assert(!list_empty(&sleb->nodes));
+ snod = list_entry(sleb->nodes.next, struct ubifs_scan_node, list);
+
+ if (snod->type == UBIFS_IDX_NODE) {
+ struct ubifs_gced_idx_leb *idx_gc;
+
+ dbg_gc("indexing LEB %d (free %d, dirty %d)",
+ lnum, lp->free, lp->dirty);
+ list_for_each_entry(snod, &sleb->nodes, list) {
+ struct ubifs_idx_node *idx = snod->node;
+ int level = le16_to_cpu(idx->level);
+
+ ubifs_assert(snod->type == UBIFS_IDX_NODE);
+ key_read(c, ubifs_idx_key(c, idx), &snod->key);
+ err = ubifs_dirty_idx_node(c, &snod->key, level, lnum,
+ snod->offs);
+ if (err)
+ goto out;
+ }
+
+ idx_gc = kmalloc(sizeof(struct ubifs_gced_idx_leb), GFP_NOFS);
+ if (!idx_gc) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ idx_gc->lnum = lnum;
+ idx_gc->unmap = 0;
+ list_add(&idx_gc->list, &c->idx_gc);
+
+ /*
+ * Don't release the LEB until after the next commit, because
+ * it may contain date which is needed for recovery. So
+ * although we freed this LEB, it will become usable only after
+ * the commit.
+ */
+ err = ubifs_change_one_lp(c, lnum, c->leb_size, 0, 0,
+ LPROPS_INDEX, 1);
+ if (err)
+ goto out;
+ err = LEB_FREED_IDX;
+ } else {
+ dbg_gc("data LEB %d (free %d, dirty %d)",
+ lnum, lp->free, lp->dirty);
+
+ err = move_nodes(c, sleb);
+ if (err)
+ goto out;
+
+ err = gc_sync_wbufs(c);
+ if (err)
+ goto out;
+
+ err = ubifs_change_one_lp(c, lnum, c->leb_size, 0, 0, 0, 0);
+ if (err)
+ goto out;
+
+ if (c->gc_lnum == -1) {
+ c->gc_lnum = lnum;
+ err = LEB_RETAINED;
+ } else {
+ err = ubifs_wbuf_sync_nolock(wbuf);
+ if (err)
+ goto out;
+
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ goto out;
+
+ err = LEB_FREED;
+ }
+ }
+
+out:
+ ubifs_scan_destroy(sleb);
+ return err;
+}
+
+/**
+ * ubifs_garbage_collect - UBIFS garbage collector.
+ * @c: UBIFS file-system description object
+ * @anyway: do GC even if there are free LEBs
+ *
+ * This function does out-of-place garbage collection. The return codes are:
+ * o positive LEB number if the LEB has been freed and may be used;
+ * o %-EAGAIN if the caller has to run commit;
+ * o %-ENOSPC if GC failed to make any progress;
+ * o other negative error codes in case of other errors.
+ *
+ * Garbage collector writes data to the journal when GC'ing data LEBs, and just
+ * marking indexing nodes dirty when GC'ing indexing LEBs. Thus, at some point
+ * commit may be required. But commit cannot be run from inside GC, because the
+ * caller might be holding the commit lock, so %-EAGAIN is returned instead;
+ * And this error code means that the caller has to run commit, and re-run GC
+ * if there is still no free space.
+ *
+ * There are many reasons why this function may return %-EAGAIN:
+ * o the log is full and there is no space to write an LEB reference for
+ * @c->gc_lnum;
+ * o the journal is too large and exceeds size limitations;
+ * o GC moved indexing LEBs, but they can be used only after the commit;
+ * o the shrinker fails to find clean znodes to free and requests the commit;
+ * o etc.
+ *
+ * Note, if the file-system is close to be full, this function may return
+ * %-EAGAIN infinitely, so the caller has to limit amount of re-invocations of
+ * the function. E.g., this happens if the limits on the journal size are too
+ * tough and GC writes too much to the journal before an LEB is freed. This
+ * might also mean that the journal is too large, and the TNC becomes to big,
+ * so that the shrinker is constantly called, finds not clean znodes to free,
+ * and requests commit. Well, this may also happen if the journal is all right,
+ * but another kernel process consumes too much memory. Anyway, infinite
+ * %-EAGAIN may happen, but in some extreme/misconfiguration cases.
+ */
+int ubifs_garbage_collect(struct ubifs_info *c, int anyway)
+{
+ int i, err, ret, min_space = c->dead_wm;
+ struct ubifs_lprops lp;
+ struct ubifs_wbuf *wbuf = &c->jheads[GCHD].wbuf;
+
+ ubifs_assert_cmt_locked(c);
+
+ if (ubifs_gc_should_commit(c))
+ return -EAGAIN;
+
+ mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
+ /* We expect the write-buffer to be empty on entry */
+ ubifs_assert(!wbuf->used);
+
+ for (i = 0; ; i++) {
+ int space_before = c->leb_size - wbuf->offs - wbuf->used;
+ int space_after;
+
+ cond_resched();
+
+ /* Give the commit an opportunity to run */
+ if (ubifs_gc_should_commit(c)) {
+ ret = -EAGAIN;
+ break;
+ }
+
+ if (i > SOFT_LEBS_LIMIT && !list_empty(&c->idx_gc)) {
+ /*
+ * We've done enough iterations. Indexing LEBs were
+ * moved and will be available after the commit.
+ */
+ dbg_gc("soft limit, some index LEBs GC'ed, -EAGAIN");
+ ubifs_commit_required(c);
+ ret = -EAGAIN;
+ break;
+ }
+
+ if (i > HARD_LEBS_LIMIT) {
+ /*
+ * We've moved too many LEBs and have not made
+ * progress, give up.
+ */
+ dbg_gc("hard limit, -ENOSPC");
+ ret = -ENOSPC;
+ break;
+ }
+
+ /*
+ * Empty and freeable LEBs can turn up while we waited for
+ * the wbuf lock, or while we have been running GC. In that
+ * case, we should just return one of those instead of
+ * continuing to GC dirty LEBs. Hence we request
+ * 'ubifs_find_dirty_leb()' to return an empty LEB if it can.
+ */
+ ret = ubifs_find_dirty_leb(c, &lp, min_space, anyway ? 0 : 1);
+ if (ret) {
+ if (ret == -ENOSPC)
+ dbg_gc("no more dirty LEBs");
+ break;
+ }
+
+ dbg_gc("found LEB %d: free %d, dirty %d, sum %d "
+ "(min. space %d)", lp.lnum, lp.free, lp.dirty,
+ lp.free + lp.dirty, min_space);
+
+ if (lp.free + lp.dirty == c->leb_size) {
+ /* An empty LEB was returned */
+ dbg_gc("LEB %d is free, return it", lp.lnum);
+ /*
+ * ubifs_find_dirty_leb() doesn't return freeable index
+ * LEBs.
+ */
+ ubifs_assert(!(lp.flags & LPROPS_INDEX));
+ if (lp.free != c->leb_size) {
+ /*
+ * Write buffers must be sync'd before
+ * unmapping freeable LEBs, because one of them
+ * may contain data which obsoletes something
+ * in 'lp.pnum'.
+ */
+ ret = gc_sync_wbufs(c);
+ if (ret)
+ goto out;
+ ret = ubifs_change_one_lp(c, lp.lnum,
+ c->leb_size, 0, 0, 0,
+ 0);
+ if (ret)
+ goto out;
+ }
+ ret = ubifs_leb_unmap(c, lp.lnum);
+ if (ret)
+ goto out;
+ ret = lp.lnum;
+ break;
+ }
+
+ space_before = c->leb_size - wbuf->offs - wbuf->used;
+ if (wbuf->lnum == -1)
+ space_before = 0;
+
+ ret = ubifs_garbage_collect_leb(c, &lp);
+ if (ret < 0) {
+ if (ret == -EAGAIN || ret == -ENOSPC) {
+ /*
+ * These codes are not errors, so we have to
+ * return the LEB to lprops. But if the
+ * 'ubifs_return_leb()' function fails, its
+ * failure code is propagated to the caller
+ * instead of the original '-EAGAIN' or
+ * '-ENOSPC'.
+ */
+ err = ubifs_return_leb(c, lp.lnum);
+ if (err)
+ ret = err;
+ break;
+ }
+ goto out;
+ }
+
+ if (ret == LEB_FREED) {
+ /* An LEB has been freed and is ready for use */
+ dbg_gc("LEB %d freed, return", lp.lnum);
+ ret = lp.lnum;
+ break;
+ }
+
+ if (ret == LEB_FREED_IDX) {
+ /*
+ * This was an indexing LEB and it cannot be
+ * immediately used. And instead of requesting the
+ * commit straight away, we try to garbage collect some
+ * more.
+ */
+ dbg_gc("indexing LEB %d freed, continue", lp.lnum);
+ continue;
+ }
+
+ ubifs_assert(ret == LEB_RETAINED);
+ space_after = c->leb_size - wbuf->offs - wbuf->used;
+ dbg_gc("LEB %d retained, freed %d bytes", lp.lnum,
+ space_after - space_before);
+
+ if (space_after > space_before) {
+ /* GC makes progress, keep working */
+ min_space >>= 1;
+ if (min_space < c->dead_wm)
+ min_space = c->dead_wm;
+ continue;
+ }
+
+ dbg_gc("did not make progress");
+
+ /*
+ * GC moved an LEB bud have not done any progress. This means
+ * that the previous GC head LEB contained too few free space
+ * and the LEB which was GC'ed contained only large nodes which
+ * did not fit that space.
+ *
+ * We can do 2 things:
+ * 1. pick another LEB in a hope it'll contain a small node
+ * which will fit the space we have at the end of current GC
+ * head LEB, but there is no guarantee, so we try this out
+ * unless we have already been working for too long;
+ * 2. request an LEB with more dirty space, which will force
+ * 'ubifs_find_dirty_leb()' to start scanning the lprops
+ * table, instead of just picking one from the heap
+ * (previously it already picked the dirtiest LEB).
+ */
+ if (i < SOFT_LEBS_LIMIT) {
+ dbg_gc("try again");
+ continue;
+ }
+
+ min_space <<= 1;
+ if (min_space > c->dark_wm)
+ min_space = c->dark_wm;
+ dbg_gc("set min. space to %d", min_space);
+ }
+
+ if (ret == -ENOSPC && !list_empty(&c->idx_gc)) {
+ dbg_gc("no space, some index LEBs GC'ed, -EAGAIN");
+ ubifs_commit_required(c);
+ ret = -EAGAIN;
+ }
+
+ err = ubifs_wbuf_sync_nolock(wbuf);
+ if (!err)
+ err = ubifs_leb_unmap(c, c->gc_lnum);
+ if (err)
+ ret = err;
+ mutex_unlock(&wbuf->io_mutex);
+ return ret;
+
+out:
+ ubifs_assert(ret < 0);
+ ubifs_assert(ret != -ENOSPC && ret != -EAGAIN);
+ ubifs_wbuf_sync_nolock(wbuf);
+ mutex_unlock(&wbuf->io_mutex);
+ ubifs_return_leb(c, lp.lnum);
+ return ret;
+}
+
+/**
+ * ubifs_gc_start_commit - garbage collection at start of commit.
+ * @c: UBIFS file-system description object
+ *
+ * If a LEB has only dirty and free space, then we may safely unmap it and make
+ * it free. Note, we cannot do this with indexing LEBs because dirty space may
+ * correspond index nodes that are required for recovery. In that case, the
+ * LEB cannot be unmapped until after the next commit.
+ *
+ * This function returns %0 upon success and a negative error code upon failure.
+ */
+int ubifs_gc_start_commit(struct ubifs_info *c)
+{
+ struct ubifs_gced_idx_leb *idx_gc;
+ const struct ubifs_lprops *lp;
+ int err = 0, flags;
+
+ ubifs_get_lprops(c);
+
+ /*
+ * Unmap (non-index) freeable LEBs. Note that recovery requires that all
+ * wbufs are sync'd before this, which is done in 'do_commit()'.
+ */
+ while (1) {
+ lp = ubifs_fast_find_freeable(c);
+ if (unlikely(IS_ERR(lp))) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+ if (!lp)
+ break;
+ ubifs_assert(!(lp->flags & LPROPS_TAKEN));
+ ubifs_assert(!(lp->flags & LPROPS_INDEX));
+ err = ubifs_leb_unmap(c, lp->lnum);
+ if (err)
+ goto out;
+ lp = ubifs_change_lp(c, lp, c->leb_size, 0, lp->flags, 0);
+ if (unlikely(IS_ERR(lp))) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+ ubifs_assert(!(lp->flags & LPROPS_TAKEN));
+ ubifs_assert(!(lp->flags & LPROPS_INDEX));
+ }
+
+ /* Mark GC'd index LEBs OK to unmap after this commit finishes */
+ list_for_each_entry(idx_gc, &c->idx_gc, list)
+ idx_gc->unmap = 1;
+
+ /* Record index freeable LEBs for unmapping after commit */
+ while (1) {
+ lp = ubifs_fast_find_frdi_idx(c);
+ if (unlikely(IS_ERR(lp))) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+ if (!lp)
+ break;
+ idx_gc = kmalloc(sizeof(struct ubifs_gced_idx_leb), GFP_NOFS);
+ if (!idx_gc) {
+ err = -ENOMEM;
+ goto out;
+ }
+ ubifs_assert(!(lp->flags & LPROPS_TAKEN));
+ ubifs_assert(lp->flags & LPROPS_INDEX);
+ /* Don't release the LEB until after the next commit */
+ flags = (lp->flags | LPROPS_TAKEN) ^ LPROPS_INDEX;
+ lp = ubifs_change_lp(c, lp, c->leb_size, 0, flags, 1);
+ if (unlikely(IS_ERR(lp))) {
+ err = PTR_ERR(lp);
+ kfree(idx_gc);
+ goto out;
+ }
+ ubifs_assert(lp->flags & LPROPS_TAKEN);
+ ubifs_assert(!(lp->flags & LPROPS_INDEX));
+ idx_gc->lnum = lp->lnum;
+ idx_gc->unmap = 1;
+ list_add(&idx_gc->list, &c->idx_gc);
+ }
+out:
+ ubifs_release_lprops(c);
+ return err;
+}
+
+/**
+ * ubifs_gc_end_commit - garbage collection at end of commit.
+ * @c: UBIFS file-system description object
+ *
+ * This function completes out-of-place garbage collection of index LEBs.
+ */
+int ubifs_gc_end_commit(struct ubifs_info *c)
+{
+ struct ubifs_gced_idx_leb *idx_gc, *tmp;
+ struct ubifs_wbuf *wbuf;
+ int err = 0;
+
+ wbuf = &c->jheads[GCHD].wbuf;
+ mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
+ list_for_each_entry_safe(idx_gc, tmp, &c->idx_gc, list)
+ if (idx_gc->unmap) {
+ dbg_gc("LEB %d", idx_gc->lnum);
+ err = ubifs_leb_unmap(c, idx_gc->lnum);
+ if (err)
+ goto out;
+ err = ubifs_change_one_lp(c, idx_gc->lnum, LPROPS_NC,
+ LPROPS_NC, 0, LPROPS_TAKEN, -1);
+ if (err)
+ goto out;
+ list_del(&idx_gc->list);
+ kfree(idx_gc);
+ }
+out:
+ mutex_unlock(&wbuf->io_mutex);
+ return err;
+}
+
+/**
+ * ubifs_destroy_idx_gc - destroy idx_gc list.
+ * @c: UBIFS file-system description object
+ *
+ * This function destroys the idx_gc list. It is called when unmounting or
+ * remounting read-only so locks are not needed.
+ */
+void ubifs_destroy_idx_gc(struct ubifs_info *c)
+{
+ while (!list_empty(&c->idx_gc)) {
+ struct ubifs_gced_idx_leb *idx_gc;
+
+ idx_gc = list_entry(c->idx_gc.next, struct ubifs_gced_idx_leb,
+ list);
+ c->idx_gc_cnt -= 1;
+ list_del(&idx_gc->list);
+ kfree(idx_gc);
+ }
+
+}
+
+/**
+ * ubifs_get_idx_gc_leb - get a LEB from GC'd index LEB list.
+ * @c: UBIFS file-system description object
+ *
+ * Called during start commit so locks are not needed.
+ */
+int ubifs_get_idx_gc_leb(struct ubifs_info *c)
+{
+ struct ubifs_gced_idx_leb *idx_gc;
+ int lnum;
+
+ if (list_empty(&c->idx_gc))
+ return -ENOSPC;
+ idx_gc = list_entry(c->idx_gc.next, struct ubifs_gced_idx_leb, list);
+ lnum = idx_gc->lnum;
+ /* c->idx_gc_cnt is updated by the caller when lprops are updated */
+ list_del(&idx_gc->list);
+ kfree(idx_gc);
+ return lnum;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/io.c avr32-2.6/fs/ubifs/io.c
--- linux-2.6.25.6/fs/ubifs/io.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/io.c 2008-06-12 15:09:45.367815766 +0200
@@ -0,0 +1,921 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ * Copyright (C) 2006, 2007 University of Szeged, Hungary
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ * Zoltan Sogor
+ */
+
+/*
+ * This file implements UBIFS I/O subsystem which provides various I/O-related
+ * helper functions (reading/writing/checking/validating nodes) and implements
+ * write-buffering support. Write buffers help to save space which otherwise
+ * would have been wasted for padding to the nearest minimal I/O unit boundary.
+ * Instead, data first goes to the write-buffer and is flushed when the
+ * buffer is full or when it is not used for some time (by timer). This is
+ * similarto the mechanism is used by JFFS2.
+ *
+ * Write-buffers are defined by 'struct ubifs_wbuf' objects and protected by
+ * mutexes defined inside these objects. Since sometimes upper-level code
+ * has to lock the write-buffer (e.g. journal space reservation code), many
+ * functions related to write-buffers have "nolock" suffix which means that the
+ * caller has to lock the write-buffer before calling this function.
+ *
+ * UBIFS stores nodes at 64 bit-aligned addresses. If the node length is not
+ * aligned, UBIFS starts the next node from the aligned address, and the padded
+ * bytes may contain any rubbish. In other words, UBIFS does not put padding
+ * bytes in those small gaps. Common headers of nodes store real node lengths,
+ * not aligned lengths. Indexing nodes also store real lengths in branches.
+ *
+ * UBIFS uses padding when it pads to the next min. I/O unit. In this case it
+ * uses padding nodes or padding bytes, if the padding node does not fit.
+ *
+ * All UBIFS nodes are protected by CRC checksums and UBIFS checks all nodes
+ * every time they are read from the flash media.
+ */
+
+#include <linux/crc32.h>
+#include "ubifs.h"
+
+/**
+ * ubifs_check_node - check node.
+ * @c: UBIFS file-system description object
+ * @buf: node to check
+ * @lnum: logical eraseblock number
+ * @offs: offset within the logical eraseblock
+ * @quiet: print no messages
+ *
+ * This function checks node magic number and CRC checksum. This function also
+ * validates node length to prevent UBIFS from becoming crazy when an attacker
+ * feeds it a file-system image with incorrect nodes. For example, too large
+ * node length in the common header could cause UBIFS to read memory outside of
+ * allocated buffer when checking the CRC checksum.
+ *
+ * This function returns zero in case of success %-EUCLEAN in case of bad CRC
+ * or magic.
+ */
+int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum,
+ int offs, int quiet)
+{
+ int err = -EINVAL, type, node_len;
+ uint32_t crc, node_crc, magic;
+ const struct ubifs_ch *ch = buf;
+
+ ubifs_assert(lnum >= 0 && lnum < c->leb_cnt && offs >= 0);
+ ubifs_assert(!(offs & 7) && offs < c->leb_size);
+
+ magic = le32_to_cpu(ch->magic);
+ if (magic != UBIFS_NODE_MAGIC) {
+ if (!quiet)
+ ubifs_err("bad magic %#08x, expected %#08x",
+ magic, UBIFS_NODE_MAGIC);
+ err = -EUCLEAN;
+ goto out;
+ }
+
+ type = ch->node_type;
+ if (type < 0 || type >= UBIFS_NODE_TYPES_CNT) {
+ if (!quiet)
+ ubifs_err("bad node type %d", type);
+ goto out;
+ }
+
+ node_len = le32_to_cpu(ch->len);
+ if (node_len + offs > c->leb_size)
+ goto out_len;
+
+ if (c->ranges[type].max_len == 0) {
+ if (node_len != c->ranges[type].len)
+ goto out_len;
+ } else if (node_len < c->ranges[type].min_len ||
+ node_len > c->ranges[type].max_len)
+ goto out_len;
+
+ crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8);
+ node_crc = le32_to_cpu(ch->crc);
+ if (crc != node_crc) {
+ if (!quiet)
+ ubifs_err("bad CRC: calculated %#08x, read %#08x",
+ crc, node_crc);
+ err = -EUCLEAN;
+ goto out;
+ }
+
+ return 0;
+
+out_len:
+ if (!quiet)
+ ubifs_err("bad node length %d", node_len);
+out:
+ if (!quiet) {
+ ubifs_err("bad node at LEB %d:%d", lnum, offs);
+ dbg_dump_node(c, buf);
+ dbg_dump_stack();
+ }
+ return err;
+}
+
+/**
+ * ubifs_pad - pad flash space.
+ * @c: UBIFS file-system description object
+ * @buf: buffer to put padding to
+ * @pad: how many bytes to pad
+ *
+ * The flash media obliges us to write only in chunks of %c->min_io_size and
+ * when we have to write less data we add padding node to the write-buffer and
+ * pad it to the next minimal I/O unit's boundary. Padding nodes help when the
+ * media is being scanned. If the amount of wasted space is not enough to fit a
+ * padding node which takes %UBIFS_PAD_NODE_SZ bytes, we write padding bytes
+ * pattern (%UBIFS_PADDING_BYTE).
+ *
+ * Padding nodes are also used to fill gaps when the "commit-in-gaps" method is
+ * used.
+ */
+void ubifs_pad(const struct ubifs_info *c, void *buf, int pad)
+{
+ uint32_t crc;
+
+ ubifs_assert(pad >= 0 && !(pad & 7));
+
+ if (pad >= UBIFS_PAD_NODE_SZ) {
+ struct ubifs_ch *ch = buf;
+ struct ubifs_pad_node *pad_node = buf;
+
+ ch->magic = cpu_to_le32(UBIFS_NODE_MAGIC);
+ ch->node_type = UBIFS_PAD_NODE;
+ ch->group_type = UBIFS_NO_NODE_GROUP;
+ ch->padding[0] = ch->padding[1] = 0;
+ ch->sqnum = 0;
+ ch->len = cpu_to_le32(UBIFS_PAD_NODE_SZ);
+ pad -= UBIFS_PAD_NODE_SZ;
+ pad_node->pad_len = cpu_to_le32(pad);
+ crc = crc32(UBIFS_CRC32_INIT, buf + 8, UBIFS_PAD_NODE_SZ - 8);
+ ch->crc = cpu_to_le32(crc);
+ memset(buf + UBIFS_PAD_NODE_SZ, 0, pad);
+ } else if (pad > 0)
+ /* Too little space, padding node won't fit */
+ memset(buf, UBIFS_PADDING_BYTE, pad);
+}
+
+/**
+ * next_sqnum - get next sequence number.
+ * @c: UBIFS file-system description object
+ */
+static unsigned long long next_sqnum(struct ubifs_info *c)
+{
+ unsigned long long sqnum;
+
+ spin_lock(&c->cnt_lock);
+ sqnum = ++c->max_sqnum;
+ spin_unlock(&c->cnt_lock);
+
+ if (unlikely(sqnum >= SQNUM_WARN_WATERMARK)) {
+ if (sqnum >= SQNUM_WATERMARK) {
+ ubifs_err("sequence number overflow %llu, end of life",
+ sqnum);
+ ubifs_ro_mode(c, -EINVAL);
+ }
+ ubifs_warn("running out of sequence numbers, end of life soon");
+ }
+
+ return sqnum;
+}
+
+/**
+ * ubifs_prepare_node - prepare node to be written to flash.
+ * @c: UBIFS file-system description object
+ * @node: the node to pad
+ * @len: node length
+ * @pad: if the buffer has to be padded
+ *
+ * This function prepares node at @node to be written to the media - it
+ * calculates node CRC, fills the common header, and adds proper padding up to
+ * the next minimum I/O unit if @pad is not zero.
+ */
+void ubifs_prepare_node(struct ubifs_info *c, void *node, int len, int pad)
+{
+ uint32_t crc;
+ struct ubifs_ch *ch = node;
+ unsigned long long sqnum = next_sqnum(c);
+
+ ubifs_assert(len >= UBIFS_CH_SZ);
+
+ ch->magic = cpu_to_le32(UBIFS_NODE_MAGIC);
+ ch->len = cpu_to_le32(len);
+ ch->group_type = UBIFS_NO_NODE_GROUP;
+ ch->sqnum = cpu_to_le64(sqnum);
+ ch->padding[0] = ch->padding[1] = 0;
+ crc = crc32(UBIFS_CRC32_INIT, node + 8, len - 8);
+ ch->crc = cpu_to_le32(crc);
+
+ if (pad) {
+ len = ALIGN(len, 8);
+ pad = ALIGN(len, c->min_io_size) - len;
+ ubifs_pad(c, node + len, pad);
+ }
+}
+
+/**
+ * ubifs_prep_grp_node - prepare node of a group to be written to flash.
+ * @c: UBIFS file-system description object
+ * @node: the node to pad
+ * @len: node length
+ * @last: indicates the last node of the group
+ *
+ * This function prepares node at @node to be written to the media - it
+ * calculates node CRC and fills the common header.
+ */
+void ubifs_prep_grp_node(struct ubifs_info *c, void *node, int len, int last)
+{
+ uint32_t crc;
+ struct ubifs_ch *ch = node;
+ unsigned long long sqnum = next_sqnum(c);
+
+ ubifs_assert(len >= UBIFS_CH_SZ);
+
+ ch->magic = cpu_to_le32(UBIFS_NODE_MAGIC);
+ ch->len = cpu_to_le32(len);
+ if (last)
+ ch->group_type = UBIFS_LAST_OF_NODE_GROUP;
+ else
+ ch->group_type = UBIFS_IN_NODE_GROUP;
+ ch->sqnum = cpu_to_le64(sqnum);
+ ch->padding[0] = ch->padding[1] = 0;
+ crc = crc32(UBIFS_CRC32_INIT, node + 8, len - 8);
+ ch->crc = cpu_to_le32(crc);
+}
+
+/**
+ * wbuf_timer_callback - write-buffer timer callback function.
+ * @data: timer data (write-buffer descriptor)
+ *
+ * This function is called when the write-buffer timer expires.
+ */
+static void wbuf_timer_callback_nolock(unsigned long data)
+{
+ struct ubifs_wbuf *wbuf = (struct ubifs_wbuf *)data;
+
+ wbuf->need_sync = 1;
+ wbuf->c->need_wbuf_sync = 1;
+ ubifs_wake_up_bgt(wbuf->c);
+}
+
+/**
+ * new_wbuf_timer - start new write-buffer timer.
+ * @wbuf: write-buffer descriptor
+ */
+static void new_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
+{
+ ubifs_assert(!timer_pending(&wbuf->timer));
+
+ if (!wbuf->timeout)
+ return;
+
+ wbuf->timer.expires = jiffies + wbuf->timeout;
+ add_timer(&wbuf->timer);
+}
+
+/**
+ * cancel_wbuf_timer - cancel write-buffer timer.
+ * @wbuf: write-buffer descriptor
+ */
+static void cancel_wbuf_timer_nolock(struct ubifs_wbuf *wbuf)
+{
+ /*
+ * If the syncer is waiting for the lock (from the background thread's
+ * context) and another task is changing write-buffer then the syncing
+ * should be canceled.
+ */
+ wbuf->need_sync = 0;
+ del_timer(&wbuf->timer);
+}
+
+/**
+ * ubifs_wbuf_sync_nolock - synchronize write-buffer.
+ * @wbuf: write-buffer to synchronize
+ *
+ * This function synchronizes write-buffer @buf and returns zero in case of
+ * success or a negative error code in case of failure.
+ */
+int ubifs_wbuf_sync_nolock(struct ubifs_wbuf *wbuf)
+{
+ struct ubifs_info *c = wbuf->c;
+ int err, dirt;
+
+ cancel_wbuf_timer_nolock(wbuf);
+ if (!wbuf->used || wbuf->lnum == -1)
+ /* Write-buffer is empty or not seeked */
+ return 0;
+
+ dbg_io("LEB %d:%d, %d bytes",
+ wbuf->lnum, wbuf->offs, wbuf->used);
+ ubifs_assert(!(c->vfs_sb->s_flags & MS_RDONLY));
+ ubifs_assert(!(wbuf->avail & 7));
+ ubifs_assert(wbuf->offs + c->min_io_size <= c->leb_size);
+
+ if (c->ro_media)
+ return -EROFS;
+
+ ubifs_pad(c, wbuf->buf + wbuf->used, wbuf->avail);
+ err = ubi_leb_write(c->ubi, wbuf->lnum, wbuf->buf, wbuf->offs,
+ c->min_io_size, wbuf->dtype);
+ if (err) {
+ ubifs_err("cannot write %d bytes to LEB %d:%d",
+ c->min_io_size, wbuf->lnum, wbuf->offs);
+ dbg_dump_stack();
+ return err;
+ }
+
+ dirt = wbuf->avail;
+
+ spin_lock(&wbuf->lock);
+ wbuf->offs += c->min_io_size;
+ wbuf->avail = c->min_io_size;
+ wbuf->used = 0;
+ wbuf->next_ino = 0;
+ spin_unlock(&wbuf->lock);
+
+ if (wbuf->sync_callback)
+ err = wbuf->sync_callback(c, wbuf->lnum,
+ c->leb_size - wbuf->offs, dirt);
+ return err;
+}
+
+/**
+ * ubifs_wbuf_seek_nolock - seek write-buffer.
+ * @wbuf: write-buffer
+ * @lnum: logical eraseblock number to seek to
+ * @offs: logical eraseblock offset to seek to
+ * @dtype: data type
+ *
+ * This function targets the write buffer to logical eraseblock @lnum:@offs.
+ * The write-buffer is synchronized if it is not empty. Returns zero in case of
+ * success and a negative error code in case of failure.
+ */
+int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs,
+ int dtype)
+{
+ const struct ubifs_info *c = wbuf->c;
+
+ dbg_io("LEB %d:%d", lnum, offs);
+ ubifs_assert(lnum >= 0 && lnum < c->leb_cnt);
+ ubifs_assert(offs >= 0 && offs <= c->leb_size);
+ ubifs_assert(offs % c->min_io_size == 0 && !(offs & 7));
+ ubifs_assert(lnum != wbuf->lnum);
+
+ if (wbuf->used > 0) {
+ int err = ubifs_wbuf_sync_nolock(wbuf);
+
+ if (err)
+ return err;
+ }
+
+ spin_lock(&wbuf->lock);
+ wbuf->lnum = lnum;
+ wbuf->offs = offs;
+ wbuf->avail = c->min_io_size;
+ wbuf->used = 0;
+ spin_unlock(&wbuf->lock);
+ wbuf->dtype = dtype;
+
+ return 0;
+}
+
+/**
+ * ubifs_bg_wbufs_sync - synchronize write-buffers.
+ * @c: UBIFS file-system description object
+ *
+ * This function is called by background thread to synchronize write-buffers.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+int ubifs_bg_wbufs_sync(struct ubifs_info *c)
+{
+ int err, i;
+
+ if (!c->need_wbuf_sync)
+ return 0;
+ c->need_wbuf_sync = 0;
+
+ if (c->ro_media) {
+ err = -EROFS;
+ goto out_timers;
+ }
+
+ dbg_io("synchronize");
+ for (i = 0; i < c->jhead_cnt; i++) {
+ struct ubifs_wbuf *wbuf = &c->jheads[i].wbuf;
+
+ cond_resched();
+
+ /*
+ * If the mutex is locked then wbuf is being changed, so
+ * synchronization is not necessary.
+ */
+ if (mutex_is_locked(&wbuf->io_mutex))
+ continue;
+
+ mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
+ if (!wbuf->need_sync) {
+ mutex_unlock(&wbuf->io_mutex);
+ continue;
+ }
+
+ err = ubifs_wbuf_sync_nolock(wbuf);
+ mutex_unlock(&wbuf->io_mutex);
+ if (err) {
+ ubifs_err("cannot sync write-buffer, error %d", err);
+ ubifs_ro_mode(c, err);
+ goto out_timers;
+ }
+ }
+
+ return 0;
+
+out_timers:
+ /* Cancel all timers to prevent repeated errors */
+ for (i = 0; i < c->jhead_cnt; i++) {
+ struct ubifs_wbuf *wbuf = &c->jheads[i].wbuf;
+
+ mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
+ cancel_wbuf_timer_nolock(wbuf);
+ mutex_unlock(&wbuf->io_mutex);
+ }
+ return err;
+}
+
+/**
+ * ubifs_wbuf_write_nolock - write data to flash via write-buffer.
+ * @wbuf: write-buffer
+ * @buf: node to write
+ * @len: node length
+ *
+ * This function writes data to flash via write-buffer @wbuf. This means that
+ * the last piece of the node won't reach the flash media immediately if it
+ * does not take whole minimal I/O unit. Instead, the node will sit in RAM
+ * until the write-buffer is synchronized (e.g., by timer).
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure. If the node cannot be written because there is no more
+ * space in this logical eraseblock, %-ENOSPC is returned.
+ */
+int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len)
+{
+ struct ubifs_info *c = wbuf->c;
+ int err, written, n, aligned_len = ALIGN(len, 8), offs;
+
+ dbg_io("%d bytes (%s) to wbuf at LEB %d:%d", len,
+ dbg_ntype(((struct ubifs_ch *)buf)->node_type), wbuf->lnum,
+ wbuf->offs + wbuf->used);
+ ubifs_assert(len > 0 && wbuf->lnum >= 0 && wbuf->lnum < c->leb_cnt);
+ ubifs_assert(wbuf->offs >= 0 && wbuf->offs % c->min_io_size == 0);
+ ubifs_assert(!(wbuf->offs & 7) && wbuf->offs <= c->leb_size);
+ ubifs_assert(wbuf->avail > 0 && wbuf->avail <= c->min_io_size);
+ ubifs_assert(mutex_is_locked(&wbuf->io_mutex));
+
+ if (c->leb_size - wbuf->offs - wbuf->used < aligned_len) {
+ err = -ENOSPC;
+ goto out;
+ }
+
+ cancel_wbuf_timer_nolock(wbuf);
+
+ if (c->ro_media)
+ return -EROFS;
+
+ if (aligned_len <= wbuf->avail) {
+ /*
+ * The node is not very large and fits entirely within
+ * write-buffer.
+ */
+ memcpy(wbuf->buf + wbuf->used, buf, len);
+
+ if (aligned_len == wbuf->avail) {
+ dbg_io("flush wbuf to LEB %d:%d", wbuf->lnum,
+ wbuf->offs);
+ err = ubi_leb_write(c->ubi, wbuf->lnum, wbuf->buf,
+ wbuf->offs, c->min_io_size,
+ wbuf->dtype);
+ if (err)
+ goto out;
+
+ spin_lock(&wbuf->lock);
+ wbuf->offs += c->min_io_size;
+ wbuf->avail = c->min_io_size;
+ wbuf->used = 0;
+ wbuf->next_ino = 0;
+ spin_unlock(&wbuf->lock);
+ } else {
+ spin_lock(&wbuf->lock);
+ wbuf->avail -= aligned_len;
+ wbuf->used += aligned_len;
+ spin_unlock(&wbuf->lock);
+ }
+
+ goto exit;
+ }
+
+ /*
+ * The node is large enough and does not fit entirely within current
+ * minimal I/O unit. We have to fill and flush write-buffer and switch
+ * to the next min. I/O unit.
+ */
+ dbg_io("flush wbuf to LEB %d:%d", wbuf->lnum, wbuf->offs);
+ memcpy(wbuf->buf + wbuf->used, buf, wbuf->avail);
+ err = ubi_leb_write(c->ubi, wbuf->lnum, wbuf->buf, wbuf->offs,
+ c->min_io_size, wbuf->dtype);
+ if (err)
+ goto out;
+
+ offs = wbuf->offs + c->min_io_size;
+ len -= wbuf->avail;
+ aligned_len -= wbuf->avail;
+ written = wbuf->avail;
+
+ /*
+ * The remaining data may take more whole min. I/O units, so write the
+ * remains multiple to min. I/O unit size directly to the flash media.
+ * We align node length to 8-byte boundary because we anyway flash wbuf
+ * if the remaining space is less than 8 bytes.
+ */
+ n = aligned_len >> c->min_io_shift;
+ if (n) {
+ n <<= c->min_io_shift;
+ dbg_io("write %d bytes to LEB %d:%d", n, wbuf->lnum, offs);
+ err = ubi_leb_write(c->ubi, wbuf->lnum, buf + written, offs, n,
+ wbuf->dtype);
+ if (err)
+ goto out;
+ offs += n;
+ aligned_len -= n;
+ len -= n;
+ written += n;
+ }
+
+ spin_lock(&wbuf->lock);
+ if (aligned_len)
+ /*
+ * And now we have what's left and what does not take whole
+ * min. I/O unit, so write it to the write-buffer and we are
+ * done.
+ */
+ memcpy(wbuf->buf, buf + written, len);
+
+ wbuf->offs = offs;
+ wbuf->used = aligned_len;
+ wbuf->avail = c->min_io_size - aligned_len;
+ wbuf->next_ino = 0;
+ spin_unlock(&wbuf->lock);
+
+exit:
+ if (wbuf->sync_callback) {
+ int free = c->leb_size - wbuf->offs - wbuf->used;
+
+ err = wbuf->sync_callback(c, wbuf->lnum, free, 0);
+ if (err)
+ goto out;
+ }
+
+ if (wbuf->used)
+ new_wbuf_timer_nolock(wbuf);
+
+ return 0;
+
+out:
+ ubifs_err("cannot write %d bytes to LEB %d:%d, error %d",
+ len, wbuf->lnum, wbuf->offs, err);
+ dbg_dump_node(c, buf);
+ dbg_dump_stack();
+ dbg_dump_leb(c, wbuf->lnum);
+ return err;
+}
+
+/**
+ * ubifs_write_node - write node to the media.
+ * @c: UBIFS file-system description object
+ * @buf: the node to write
+ * @len: node length
+ * @lnum: logical eraseblock number
+ * @offs: offset within the logical eraseblock
+ * @dtype: node life-time hint (%UBI_LONGTERM, %UBI_SHORTTERM, %UBI_UNKNOWN)
+ *
+ * This function automatically fills node magic number, assigns sequence
+ * number, and calculates node CRC checksum. The length of the @buf buffer has
+ * to be aligned to the minimal I/O unit size. This function automatically
+ * appends padding node and padding bytes if needed. Returns zero in case of
+ * success and a negative error code in case of failure.
+ */
+int ubifs_write_node(struct ubifs_info *c, void *buf, int len, int lnum,
+ int offs, int dtype)
+{
+ int err, buf_len = ALIGN(len, c->min_io_size);
+
+ dbg_io("LEB %d:%d, %s, length %d (aligned %d)",
+ lnum, offs, dbg_ntype(((struct ubifs_ch *)buf)->node_type), len,
+ buf_len);
+ ubifs_assert(lnum >= 0 && lnum < c->leb_cnt && offs >= 0);
+ ubifs_assert(offs % c->min_io_size == 0 && offs < c->leb_size);
+
+ if (c->ro_media)
+ return -EROFS;
+
+ ubifs_prepare_node(c, buf, len, 1);
+ err = ubi_leb_write(c->ubi, lnum, buf, offs, buf_len, dtype);
+ if (err) {
+ ubifs_err("cannot write %d bytes to LEB %d:%d, error %d",
+ buf_len, lnum, offs, err);
+ dbg_dump_node(c, buf);
+ dbg_dump_stack();
+ }
+
+ return err;
+}
+
+/**
+ * ubifs_read_node_wbuf - read node from the media or write-buffer.
+ * @wbuf: wbuf to check for un-written data
+ * @buf: buffer to read to
+ * @type: node type
+ * @len: node length
+ * @lnum: logical eraseblock number
+ * @offs: offset within the logical eraseblock
+ *
+ * This function reads a node of known type and length, checks it and stores
+ * in @buf. If the node partially or fully sits in the write-buffer, this
+ * function takes data from the buffer, otherwise it reads the flash media.
+ * Returns zero in case of success, %-EUCLEAN if CRC mismatched and a negative
+ * error code in case of failure.
+ */
+int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
+ int lnum, int offs)
+{
+ const struct ubifs_info *c = wbuf->c;
+ int err, rlen, overlap;
+ struct ubifs_ch *ch = buf;
+
+ dbg_io("LEB %d:%d, %s, length %d", lnum, offs, dbg_ntype(type), len);
+ ubifs_assert(wbuf && lnum >= 0 && lnum < c->leb_cnt && offs >= 0);
+ ubifs_assert(!(offs & 7) && offs < c->leb_size);
+ ubifs_assert(type >= 0 && type < UBIFS_NODE_TYPES_CNT);
+
+ spin_lock(&wbuf->lock);
+ overlap = (lnum == wbuf->lnum && offs + len > wbuf->offs);
+ if (!overlap) {
+ /* We may safely unlock the write-buffer and read the data */
+ spin_unlock(&wbuf->lock);
+ return ubifs_read_node(c, buf, type, len, lnum, offs);
+ }
+
+ /* Don't read under wbuf */
+ rlen = wbuf->offs - offs;
+ if (rlen < 0)
+ rlen = 0;
+
+ /* Copy the rest from the write-buffer */
+ memcpy(buf + rlen, wbuf->buf + offs + rlen - wbuf->offs, len - rlen);
+ spin_unlock(&wbuf->lock);
+
+ if (rlen > 0) {
+ /* Read everything that goes before write-buffer */
+ err = ubi_read(c->ubi, lnum, buf, offs, rlen);
+ if (err && err != -EBADMSG) {
+ ubifs_err("failed to read node %d from LEB %d:%d, "
+ "error %d", type, lnum, offs, err);
+ dbg_dump_stack();
+ return err;
+ }
+ }
+
+ err = ubifs_check_node(c, buf, lnum, offs, 0);
+ if (err) {
+ ubifs_err("expected node type %d", type);
+ return err;
+ }
+
+ if (type != ch->node_type) {
+ ubifs_err("bad node type (%d but expected %d)",
+ ch->node_type, type);
+ goto out;
+ }
+
+ rlen = le32_to_cpu(ch->len);
+ if (rlen != len) {
+ ubifs_err("bad node length %d, expected %d", rlen, len);
+ goto out;
+ }
+
+ return 0;
+
+out:
+ ubifs_err("bad node at LEB %d:%d", lnum, offs);
+ dbg_dump_node(c, buf);
+ dbg_dump_stack();
+ return -EINVAL;
+}
+
+/**
+ * ubifs_read_node - read node.
+ * @c: UBIFS file-system description object
+ * @buf: buffer to read to
+ * @type: node type
+ * @len: node length (not aligned)
+ * @lnum: logical eraseblock number
+ * @offs: offset within the logical eraseblock
+ *
+ * This function reads a node of known type and and length, checks it and
+ * stores in @buf. Returns zero in case of success, %-EUCLEAN if CRC mismatched
+ * and a negative error code in case of failure.
+ */
+int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
+ int lnum, int offs)
+{
+ int err, l;
+ struct ubifs_ch *ch = buf;
+
+ dbg_io("LEB %d:%d, %s, length %d", lnum, offs, dbg_ntype(type), len);
+ ubifs_assert(lnum >= 0 && lnum < c->leb_cnt && offs >= 0);
+ ubifs_assert(len >= UBIFS_CH_SZ && offs + len <= c->leb_size);
+ ubifs_assert(!(offs & 7) && offs < c->leb_size);
+ ubifs_assert(type >= 0 && type < UBIFS_NODE_TYPES_CNT);
+
+ err = ubi_read(c->ubi, lnum, buf, offs, len);
+ if (err && err != -EBADMSG) {
+ ubifs_err("cannot read node %d from LEB %d:%d, error %d",
+ type, lnum, offs, err);
+ return err;
+ }
+
+ err = ubifs_check_node(c, buf, lnum, offs, 0);
+ if (err) {
+ ubifs_err("expected node type %d", type);
+ return err;
+ }
+
+ if (type != ch->node_type) {
+ ubifs_err("bad node type (%d but expected %d)",
+ ch->node_type, type);
+ goto out;
+ }
+
+ l = le32_to_cpu(ch->len);
+ if (l != len) {
+ ubifs_err("bad node length %d, expected %d", l, len);
+ goto out;
+ }
+
+ return 0;
+
+out:
+ ubifs_err("bad node at LEB %d:%d", lnum, offs);
+ dbg_dump_node(c, buf);
+ dbg_dump_stack();
+ return -EINVAL;
+}
+
+/**
+ * ubifs_wbuf_init - initialize write-buffer.
+ * @c: UBIFS file-system description object
+ * @wbuf: write-buffer to initialize
+ *
+ * This function initializes write buffer. Returns zero in case of success
+ * %-ENOMEM in case of failure.
+ */
+int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf)
+{
+ size_t size;
+
+ wbuf->buf = kmalloc(c->min_io_size, GFP_KERNEL);
+ if (!wbuf->buf)
+ return -ENOMEM;
+
+ size = (c->min_io_size / UBIFS_CH_SZ + 1) * sizeof(ino_t);
+ wbuf->inodes = kmalloc(size, GFP_KERNEL);
+ if (!wbuf->inodes) {
+ kfree(wbuf->buf);
+ wbuf->buf = NULL;
+ return -ENOMEM;
+ }
+
+ wbuf->used = 0;
+ wbuf->lnum = wbuf->offs = -1;
+ wbuf->avail = c->min_io_size;
+ wbuf->dtype = UBI_UNKNOWN;
+ wbuf->sync_callback = NULL;
+ mutex_init(&wbuf->io_mutex);
+ spin_lock_init(&wbuf->lock);
+
+ wbuf->c = c;
+ init_timer(&wbuf->timer);
+ wbuf->timer.function = wbuf_timer_callback_nolock;
+ wbuf->timer.data = (unsigned long)wbuf;
+ wbuf->timeout = DEFAULT_WBUF_TIMEOUT;
+ wbuf->next_ino = 0;
+
+ return 0;
+}
+
+/**
+ * ubifs_wbuf_add_ino_nolock - add an inode number into the wbuf inode array.
+ * @wbuf: the write-buffer whereto add
+ * @inum: the inode number
+ *
+ * This function adds an inode number to the inode array of the write-buffer.
+ */
+void ubifs_wbuf_add_ino_nolock(struct ubifs_wbuf *wbuf, ino_t inum)
+{
+ if (!wbuf->buf)
+ /* NOR flash or something similar */
+ return;
+
+ spin_lock(&wbuf->lock);
+ if (wbuf->used)
+ wbuf->inodes[wbuf->next_ino++] = inum;
+ spin_unlock(&wbuf->lock);
+}
+
+/**
+ * wbuf_has_ino - returns if the wbuf contains data from the inode.
+ * @wbuf: the write-buffer
+ * @inum: the inode number
+ *
+ * This function returns with %1 if the write-buffer contains some data from the
+ * given inode otherwise it returns with %0.
+ */
+static int wbuf_has_ino(struct ubifs_wbuf *wbuf, ino_t inum)
+{
+ int i, ret = 0;
+
+ spin_lock(&wbuf->lock);
+ for (i = 0; i < wbuf->next_ino; i++)
+ if (inum == wbuf->inodes[i]) {
+ ret = 1;
+ break;
+ }
+ spin_unlock(&wbuf->lock);
+
+ return ret;
+}
+
+/**
+ * ubifs_sync_wbufs_by_inodes - synchronize write-buffers which have data.
+ * belonging to specified inodes.
+ * @c: UBIFS file-system description object
+ * @inodes: array of inodes
+ * @count: number of elements in @inodes
+ *
+ * This function synchronizes write-buffers which contain nodes belonging to
+ * any inode specified in @inodes array. Returns zero in case of success and a
+ * negative error code in case of failure.
+ */
+int ubifs_sync_wbufs_by_inodes(struct ubifs_info *c,
+ struct inode * const *inodes, int count)
+{
+ int i, j, err = 0;
+
+ ubifs_assert(count);
+
+ for (i = 0; i < c->jhead_cnt; i++) {
+ struct ubifs_wbuf *wbuf = &c->jheads[i].wbuf;
+
+ if (i == GCHD)
+ /*
+ * GC head is special, do not look at it. Even if the
+ * head contains something related to this inode, it is
+ * a _copy_ of corresponding on-flash node which sits
+ * somewhere else.
+ */
+ continue;
+
+ for (j = 0; j < count && !err; j++)
+ if (wbuf_has_ino(wbuf, inodes[j]->i_ino)) {
+ mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
+ if (wbuf_has_ino(wbuf, inodes[j]->i_ino))
+ err = ubifs_wbuf_sync_nolock(wbuf);
+ mutex_unlock(&wbuf->io_mutex);
+ break;
+ }
+
+ if (err) {
+ ubifs_ro_mode(c, err);
+ break;
+ }
+ }
+
+ return err;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/ioctl.c avr32-2.6/fs/ubifs/ioctl.c
--- linux-2.6.25.6/fs/ubifs/ioctl.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/ioctl.c 2008-06-12 15:09:45.367815766 +0200
@@ -0,0 +1,204 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ * Copyright (C) 2006, 2007 University of Szeged, Hungary
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Zoltan Sogor
+ * Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/* This file implements EXT2-compatible extended attribute ioctl() calls */
+
+#include <linux/compat.h>
+#include <linux/smp_lock.h>
+#include "ubifs.h"
+
+/**
+ * ubifs_set_inode_flags - set VFS inode flags.
+ * @inode: VFS inode to set flags for
+ *
+ * This function propagates flags from UBIFS inode object to VFS inode object.
+ */
+void ubifs_set_inode_flags(struct inode *inode)
+{
+ unsigned int flags = ubifs_inode(inode)->flags;
+
+ inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | S_DIRSYNC);
+ if (flags & UBIFS_SYNC_FL)
+ inode->i_flags |= S_SYNC;
+ if (flags & UBIFS_APPEND_FL)
+ inode->i_flags |= S_APPEND;
+ if (flags & UBIFS_IMMUTABLE_FL)
+ inode->i_flags |= S_IMMUTABLE;
+ if (flags & UBIFS_DIRSYNC_FL)
+ inode->i_flags |= S_DIRSYNC;
+}
+
+/*
+ * ioctl2ubifs - convert ioctl inode flags to UBIFS inode flags.
+ * @ioctl_flags: flags to convert
+ *
+ * This function convert ioctl flags (@FS_COMPR_FL, etc) to UBIFS inode flags
+ * (@UBIFS_COMPR_FL, etc).
+ */
+static int ioctl2ubifs(int ioctl_flags)
+{
+ int ubifs_flags = 0;
+
+ if (ioctl_flags & FS_COMPR_FL)
+ ubifs_flags |= UBIFS_COMPR_FL;
+ if (ioctl_flags & FS_SYNC_FL)
+ ubifs_flags |= UBIFS_SYNC_FL;
+ if (ioctl_flags & FS_APPEND_FL)
+ ubifs_flags |= UBIFS_APPEND_FL;
+ if (ioctl_flags & FS_IMMUTABLE_FL)
+ ubifs_flags |= UBIFS_IMMUTABLE_FL;
+ if (ioctl_flags & FS_DIRSYNC_FL)
+ ubifs_flags |= UBIFS_DIRSYNC_FL;
+
+ return ubifs_flags;
+}
+
+/*
+ * ubifs2ioctl - convert UBIFS inode flags to ioctl inode flags.
+ * @ubifs_flags: flags to convert
+ *
+ * This function convert UBIFS (@UBIFS_COMPR_FL, etc) to ioctl flags
+ * (@FS_COMPR_FL, etc).
+ */
+static int ubifs2ioctl(int ubifs_flags)
+{
+ int ioctl_flags = 0;
+
+ if (ubifs_flags & UBIFS_COMPR_FL)
+ ioctl_flags |= FS_COMPR_FL;
+ if (ubifs_flags & UBIFS_SYNC_FL)
+ ioctl_flags |= FS_SYNC_FL;
+ if (ubifs_flags & UBIFS_APPEND_FL)
+ ioctl_flags |= FS_APPEND_FL;
+ if (ubifs_flags & UBIFS_IMMUTABLE_FL)
+ ioctl_flags |= FS_IMMUTABLE_FL;
+ if (ubifs_flags & UBIFS_DIRSYNC_FL)
+ ioctl_flags |= FS_DIRSYNC_FL;
+
+ return ioctl_flags;
+}
+
+static int setflags(struct inode *inode, int flags)
+{
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ struct ubifs_budget_req req;
+ int oldflags, err;
+
+ mutex_lock(&inode->i_mutex);
+
+ memset(&req, 0 , sizeof(struct ubifs_budget_req));
+ err = ubifs_budget_inode_op(c, inode, &req);
+ if (err)
+ goto out;
+
+ /*
+ * The IMMUTABLE and APPEND_ONLY flags can only be changed by
+ * the relevant capability.
+ */
+ oldflags = ubifs2ioctl(ui->flags);
+ if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
+ if (!capable(CAP_LINUX_IMMUTABLE)) {
+ err = -EPERM;
+ goto out_budg;
+ }
+ }
+
+ ui->flags = ioctl2ubifs(flags);
+ ubifs_set_inode_flags(inode);
+
+ inode->i_ctime = ubifs_current_time(inode);
+ mark_inode_dirty_sync(inode);
+
+ ubifs_release_ino_dirty(c, inode, &req);
+
+ if (IS_SYNC(inode))
+ err = write_inode_now(inode, 1);
+
+ mutex_unlock(&inode->i_mutex);
+ return err;
+
+out_budg:
+ ubifs_cancel_ino_op(c, inode, &req);
+out:
+ ubifs_err("can't modify inode %lu attributes", inode->i_ino);
+ mutex_unlock(&inode->i_mutex);
+ return err;
+}
+
+long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int flags;
+ struct inode *inode = file->f_path.dentry->d_inode;
+
+ switch (cmd) {
+ case FS_IOC_GETFLAGS:
+ flags = ubifs2ioctl(ubifs_inode(inode)->flags);
+
+ return put_user(flags, (int __user *) arg);
+
+ case FS_IOC_SETFLAGS: {
+ if (IS_RDONLY(inode))
+ return -EROFS;
+
+ if (!is_owner_or_cap(inode))
+ return -EACCES;
+
+ if (get_user(flags, (int __user *) arg))
+ return -EFAULT;
+
+ if (!S_ISDIR(inode->i_mode))
+ flags &= ~FS_DIRSYNC_FL;
+
+ return setflags(inode, flags);
+ }
+
+ default:
+ return -ENOTTY;
+ }
+}
+
+#ifdef CONFIG_COMPAT
+long ubifs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int err;
+
+ switch (cmd) {
+ case FS_IOC32_GETFLAGS:
+ cmd = FS_IOC_GETFLAGS;
+ break;
+ case FS_IOC32_SETFLAGS:
+ cmd = FS_IOC_SETFLAGS;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ lock_kernel();
+ err = ubifs_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
+ unlock_kernel();
+
+ return err;
+}
+#endif
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/journal.c avr32-2.6/fs/ubifs/journal.c
--- linux-2.6.25.6/fs/ubifs/journal.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/journal.c 2008-06-12 15:09:45.367815766 +0200
@@ -0,0 +1,1286 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file implements UBIFS journal.
+ *
+ * The journal consists of 2 parts - the log and bud LEBs. The log has fixed
+ * length and position, while a bud logical eraseblock is any LEB in the main
+ * area. Buds contain file system data - data nodes, inode nodes, etc. The log
+ * contains only references to buds and some other stuff like commit
+ * start node. The idea is that when we commit the journal, we do
+ * not copy the data, the buds just become indexed. Since after the commit the
+ * nodes in bud eraseblocks become leaf nodes of the file system index tree, we
+ * use term "bud". Analogy is obvious, bud eraseblocks contain nodes which will
+ * become leafs in the future.
+ *
+ * The journal is multi-headed because we want to write data to the journal as
+ * optimally as possible. It is nice to have nodes belonging to the same inode
+ * in one LEB, so we may write data owned by different inodes to different
+ * journal heads, although at present only one data head is used.
+ *
+ * For recovery reasons, the base head contains all inode nodes, all directory
+ * entry nodes and all truncate nodes. This means that the other heads contain
+ * only data nodes.
+ *
+ * Bud LEBs may be half-indexed. For example, if the bud was not full at the
+ * time of commit, the bud is retained to continue to be used in the journal,
+ * even though the "front" of the LEB is now indexed. In that case, the log
+ * reference contains the offset where the bud starts for the purposes of the
+ * journal.
+ *
+ * The journal size has to be limited, because the larger is the journal, the
+ * longer it takes to mount UBIFS (scanning the journal) and the more memory it
+ * takes (indexing in the TNC).
+ *
+ * Note, all the journal write operations like 'ubifs_jnl_update()' here, which
+ * write multiple UBIFS nodes to the journal at one go, are atomic with respect
+ * to unclean reboots. Should the unclean reboot happen, the recovery code drops
+ * all the nodes.
+ */
+
+#include "ubifs.h"
+
+/**
+ * zero_ino_node_unused - zero out unused fields of an on-flash inode node.
+ * @ino: the inode to zero out
+ */
+static inline void zero_ino_node_unused(struct ubifs_ino_node *ino)
+{
+ memset(ino->padding, 0, 26);
+}
+
+/**
+ * zero_dent_node_unused - zero out unused fields of an on-flash directory
+ * entry node.
+ * @ino: the directory entry to zero out
+ */
+static inline void zero_dent_node_unused(struct ubifs_dent_node *dent)
+{
+ dent->padding1 = 0;
+ memset(dent->padding2, 0, 4);
+}
+
+/**
+ * zero_data_node_unused - zero out unused fields of an on-flash data node.
+ * @ino: the data node to zero out
+ */
+static inline void zero_data_node_unused(struct ubifs_data_node *data)
+{
+ memset(data->padding, 0, 2);
+}
+
+/**
+ * zero_trun_node_unused - zero out unused fields of an on-flash truncation
+ * node.
+ * @ino: the truncation node to zero out
+ */
+static inline void zero_trun_node_unused(struct ubifs_trun_node *trun)
+{
+ memset(trun->padding, 0, 12);
+}
+
+/**
+ * reserve_space - reserve space in the journal.
+ * @c: UBIFS file-system description object
+ * @jhead: journal head number
+ * @len: node length
+ *
+ * This function reserves space in journal head @head. If the reservation
+ * succeeded, the journal head stays locked and later has to be unlocked using
+ * 'release_head()'. 'write_node()' and 'write_head()' functions also unlock
+ * it. Returns zero in case of success, %-EAGAIN if commit has to be done, and
+ * other negative error codes in case of other failures.
+ */
+static int reserve_space(struct ubifs_info *c, int jhead, int len)
+{
+ int err = 0, err1, retries = 0, avail, lnum, offs, free, squeeze;
+ struct ubifs_wbuf *wbuf = &c->jheads[jhead].wbuf;
+
+ /*
+ * Typically, the base head has smaller nodes written to it, so it is
+ * better to try to allocate space at the ends of eraseblocks. This is
+ * what the squeeze parameter does.
+ */
+ squeeze = (jhead == BASEHD);
+again:
+ mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
+ avail = c->leb_size - wbuf->offs - wbuf->used;
+
+ if (wbuf->lnum != -1 && avail >= len)
+ return 0;
+
+ /*
+ * Write buffer wasn't seek'ed or there is no enough space - look for an
+ * LEB with some empty space.
+ */
+ lnum = ubifs_find_free_space(c, len, &free, squeeze);
+ if (lnum >= 0) {
+ /* Found an LEB, add it to the journal head */
+ offs = c->leb_size - free;
+ err = ubifs_add_bud_to_log(c, jhead, lnum, offs);
+ if (err)
+ goto out_return;
+ /* A new bud was successfully allocated and added to the log */
+ goto out;
+ }
+
+ err = lnum;
+ if (err != -ENOSPC)
+ goto out_unlock;
+
+ /*
+ * No free space, we have to run garbage collector to make
+ * some. But the write-buffer mutex has to be unlocked because
+ * GC have to sync write buffers, which may lead a deadlock.
+ */
+ dbg_jnl("no free space jhead %d, run GC", jhead);
+ mutex_unlock(&wbuf->io_mutex);
+
+ lnum = ubifs_garbage_collect(c, 0);
+ if (lnum < 0) {
+ err = lnum;
+ if (err != -ENOSPC)
+ return err;
+
+ /*
+ * GC could not make a free LEB. But someone else may
+ * have allocated new bud for this journal head,
+ * because we dropped the 'io_mutex', so try once
+ * again.
+ */
+ dbg_jnl("GC couldn't make a free LEB for jhead %d", jhead);
+ if (retries++ < 2) {
+ dbg_jnl("retry (%d)", retries);
+ goto again;
+ }
+
+ dbg_jnl("return -ENOSPC");
+ return err;
+ }
+
+ mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
+ dbg_jnl("got LEB %d for jhead %d", lnum, jhead);
+ avail = c->leb_size - wbuf->offs - wbuf->used;
+
+ if (wbuf->lnum != -1 && avail >= len) {
+ /*
+ * Someone else has switched the journal head and we have
+ * enough space now. This happens when more then one process is
+ * trying to write to the same journal head at the same time.
+ */
+ dbg_jnl("return LEB %d back, already have LEB %d:%d",
+ lnum, wbuf->lnum, wbuf->offs + wbuf->used);
+ err = ubifs_return_leb(c, lnum);
+ if (err)
+ goto out_unlock;
+ return 0;
+ }
+
+ err = ubifs_add_bud_to_log(c, jhead, lnum, 0);
+ if (err)
+ goto out_return;
+ offs = 0;
+
+out:
+ err = ubifs_wbuf_seek_nolock(wbuf, lnum, offs, UBI_SHORTTERM);
+ if (err)
+ goto out_unlock;
+
+ return 0;
+
+out_unlock:
+ mutex_unlock(&wbuf->io_mutex);
+ return err;
+
+out_return:
+ /* An error occurred and the LEB has to be returned to lprops */
+ ubifs_assert(err < 0);
+ err1 = ubifs_return_leb(c, lnum);
+ if (err1 && err == -EAGAIN)
+ /*
+ * Return original error code 'err' only if it is not
+ * '-EAGAIN', which is not really an error. Otherwise, return
+ * the error code of 'ubifs_return_leb()'.
+ */
+ err = err1;
+ mutex_unlock(&wbuf->io_mutex);
+ return err;
+}
+
+/**
+ * write_node - write node to a journal head.
+ * @c: UBIFS file-system description object
+ * @jhead: journal head
+ * @node: node to write
+ * @len: node length
+ * @lnum: LEB number written is returned here
+ * @offs: offset written is returned here
+ *
+ * This function writes a node to reserved space of journal head @jhead.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+static int write_node(struct ubifs_info *c, int jhead, void *node, int len,
+ int *lnum, int *offs)
+{
+ struct ubifs_wbuf *wbuf = &c->jheads[jhead].wbuf;
+
+ ubifs_assert(jhead != GCHD);
+
+ *lnum = c->jheads[jhead].wbuf.lnum;
+ *offs = c->jheads[jhead].wbuf.offs + c->jheads[jhead].wbuf.used;
+
+ dbg_jnl("jhead %d, LEB %d:%d, len %d", jhead, *lnum, *offs, len);
+ ubifs_prepare_node(c, node, len, 0);
+
+ return ubifs_wbuf_write_nolock(wbuf, node, len);
+}
+
+/**
+ * write_head - write data to a journal head.
+ * @c: UBIFS file-system description object
+ * @jhead: journal head
+ * @buf: buffer to write
+ * @len: length to write
+ * @lnum: LEB number written is returned here
+ * @offs: offset written is returned here
+ * @sync: non-zero if the write-buffer has to by synchronized
+ *
+ * This function is the same as 'write_node()' but it does not assume the
+ * buffer it is writing is a node, so it does not prepare it (which means
+ * initializing common header and calculating CRC).
+ */
+static int write_head(struct ubifs_info *c, int jhead, void *buf, int len,
+ int *lnum, int *offs, int sync)
+{
+ int err;
+ struct ubifs_wbuf *wbuf = &c->jheads[jhead].wbuf;
+
+ ubifs_assert(jhead != GCHD);
+
+ *lnum = c->jheads[jhead].wbuf.lnum;
+ *offs = c->jheads[jhead].wbuf.offs + c->jheads[jhead].wbuf.used;
+ dbg_jnl("jhead %d, LEB %d:%d, len %d", jhead, *lnum, *offs, len);
+
+ err = ubifs_wbuf_write_nolock(wbuf, buf, len);
+ if (err)
+ return err;
+ if (sync)
+ err = ubifs_wbuf_sync_nolock(wbuf);
+ return err;
+}
+
+/**
+ * make_reservation - reserve journal space.
+ * @c: UBIFS file-system description object
+ * @jhead: journal head
+ * @len: how many bytes to reserve
+ *
+ * This function makes space reservation in journal head @jhead. The function
+ * takes the commit lock and locks the journal head, and the caller has to
+ * unlock the head and finish the reservation with 'finish_reservation()'.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ *
+ * Note, the journal head may be unlocked as soon as the data is written, while
+ * the commit lock has to be released after the data has been added to the
+ * TNC.
+ */
+static int make_reservation(struct ubifs_info *c, int jhead, int len)
+{
+ int err, cmt_retries = 0, nospc_retries = 0;
+
+ ubifs_assert(len <= c->dark_wm);
+
+again:
+ down_read(&c->commit_sem);
+ err = reserve_space(c, jhead, len);
+ if (!err)
+ return 0;
+ up_read(&c->commit_sem);
+
+ if (err == -ENOSPC) {
+ /*
+ * GC could not make any progress. We should try to commit
+ * once because it could make some dirty space and GC would
+ * make progress, so make the error -EAGAIN so that the below
+ * will commit and re-try.
+ */
+ if (nospc_retries++ < 2) {
+ dbg_jnl("no space, retry");
+ err = -EAGAIN;
+ }
+
+ /*
+ * This means that the budgeting is incorrect. We always have
+ * to be able to write to the media, because all operations are
+ * budgeted. Deletions are not budgeted, though, but we reserve
+ * an extra LEB for them.
+ */
+ }
+
+ if (err != -EAGAIN)
+ goto out;
+
+ /*
+ * -EAGAIN means that the journal is full or too large, or the above
+ * code wants to do one commit. Do this and re-try.
+ */
+ if (cmt_retries > 128) {
+ /*
+ * This should not happen unless the journal size limitations
+ * are too tough.
+ */
+ ubifs_err("stuck in space allocation");
+ err = -ENOSPC;
+ goto out;
+ } else if (cmt_retries > 32)
+ ubifs_warn("too many space allocation re-tries (%d)",
+ cmt_retries);
+
+ dbg_jnl("-EAGAIN, commit and retry (retried %d times)",
+ cmt_retries);
+ cmt_retries += 1;
+
+ err = ubifs_run_commit(c);
+ if (err)
+ return err;
+ goto again;
+
+out:
+ ubifs_err("cannot reserve %d bytes in jhead %d, error %d",
+ len, jhead, err);
+ if (err == -ENOSPC) {
+ /* This are some budgeting problems, print useful information */
+ down_write(&c->commit_sem);
+ spin_lock(&c->space_lock);
+ dbg_dump_stack();
+ dbg_dump_budg(c);
+ spin_unlock(&c->space_lock);
+ dbg_dump_lprops(c);
+ cmt_retries = dbg_check_lprops(c);
+ up_write(&c->commit_sem);
+ }
+
+ return err;
+}
+
+/**
+ * release_head - release a journal head.
+ * @c: UBIFS file-system description object
+ * @jhead: journal head
+ *
+ * This function releases journal head @jhead which was locked by
+ * the 'make_reservation()' function. It has to be called after each successful
+ * 'make_reservation()' invocation.
+ */
+static inline void release_head(struct ubifs_info *c, int jhead)
+{
+ mutex_unlock(&c->jheads[jhead].wbuf.io_mutex);
+}
+
+/**
+ * finish_reservation - finish a reservation.
+ * @c: UBIFS file-system description object
+ *
+ * This function finishes journal space reservation. It must be called after
+ * 'make_reservation()'.
+ */
+static void finish_reservation(struct ubifs_info *c)
+{
+ up_read(&c->commit_sem);
+}
+
+/**
+ * get_dent_type - translate VFS inode mode to UBIFS directory entry type.
+ * @mode: inode mode
+ */
+static int get_dent_type(int mode)
+{
+ switch (mode & S_IFMT) {
+ case S_IFREG:
+ return UBIFS_ITYPE_REG;
+ case S_IFDIR:
+ return UBIFS_ITYPE_DIR;
+ case S_IFLNK:
+ return UBIFS_ITYPE_LNK;
+ case S_IFBLK:
+ return UBIFS_ITYPE_BLK;
+ case S_IFCHR:
+ return UBIFS_ITYPE_CHR;
+ case S_IFIFO:
+ return UBIFS_ITYPE_FIFO;
+ case S_IFSOCK:
+ return UBIFS_ITYPE_SOCK;
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+/**
+ * pack_inode - pack an inode node.
+ * @c: UBIFS file-system description object
+ * @ino: buffer in which to pack inode node
+ * @inode: inode to pack
+ * @last: indicates the last node of the group
+ * @last_reference: non-zero if this is a deletion inode
+ */
+static void pack_inode(struct ubifs_info *c, struct ubifs_ino_node *ino,
+ const struct inode *inode, int last, int last_reference)
+{
+ int data_len = 0;
+ struct ubifs_inode *ui = ubifs_inode(inode);
+
+ ino->ch.node_type = UBIFS_INO_NODE;
+ ino_key_init_flash(c, &ino->key, inode->i_ino);
+ ino->creat_sqnum = cpu_to_le64(ui->creat_sqnum);
+ ino->size = cpu_to_le64(i_size_read(inode));
+ ino->nlink = cpu_to_le32(inode->i_nlink);
+ ino->atime_sec = cpu_to_le64(inode->i_atime.tv_sec);
+ ino->atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
+ ino->ctime_sec = cpu_to_le64(inode->i_ctime.tv_sec);
+ ino->ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
+ ino->mtime_sec = cpu_to_le64(inode->i_mtime.tv_sec);
+ ino->mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
+ ino->uid = cpu_to_le32(inode->i_uid);
+ ino->gid = cpu_to_le32(inode->i_gid);
+ ino->mode = cpu_to_le32(inode->i_mode);
+ ino->flags = cpu_to_le32(ui->flags);
+ ino->compr_type = cpu_to_le16(ui->compr_type);
+ ino->xattr_cnt = cpu_to_le32(ui->xattr_cnt);
+ ino->xattr_size = cpu_to_le64(ui->xattr_size);
+ ino->xattr_names = cpu_to_le32(ui->xattr_names);
+ ino->data_len = cpu_to_le32(ui->data_len);
+ zero_ino_node_unused(ino);
+
+ /*
+ * Drop the attached data if this is a deletion inode, the data is not
+ * needed anymore.
+ */
+ if (!last_reference) {
+ memcpy(ino->data, ui->data, ui->data_len);
+ data_len = ui->data_len;
+ }
+
+ ubifs_prep_grp_node(c, ino, UBIFS_INO_NODE_SZ + data_len, last);
+}
+
+/**
+ * ubifs_jnl_update - update inode.
+ * @c: UBIFS file-system description object
+ * @dir: parent inode or host inode in case of extended attributes
+ * @nm: directory entry name
+ * @inode: inode
+ * @deletion: indicates a directory entry deletion i.e unlink or rmdir
+ * @sync: non-zero if the write-buffer has to be synchronized
+ * @xent: non-zero if the directory entry is an extended attribute entry
+ *
+ * This function updates an inode by writing a directory entry (or extended
+ * attribute entry), the inode itself, and the parent directory inode (or the
+ * host inode) to the journal.
+ *
+ * The function writes the host inode @dir last, which is important in case of
+ * extended attributes. Indeed, then we guarantee that if the host inode gets
+ * synchronized, and the write-buffer it sits in gets flushed, the extended
+ * attribute inode gets flushed too. And this is exactly what the user expects -
+ * synchronizing the host inode synchronizes its extended attributes.
+ * Similarly, this guarantees that if @dir is synchronized, its directory entry
+ * corresponding to @nm gets synchronized too.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir,
+ const struct qstr *nm, const struct inode *inode,
+ int deletion, int sync, int xent)
+{
+ int err, dlen, ilen, len, lnum, ino_offs, dent_offs;
+ int aligned_dlen, aligned_ilen;
+ int last_reference = !!(deletion && inode->i_nlink == 0);
+ struct ubifs_dent_node *dent;
+ struct ubifs_ino_node *ino;
+ union ubifs_key dent_key, ino_key;
+
+ dbg_jnl("ino %lu, dent '%.*s', data len %d in dir ino %lu",
+ inode->i_ino, nm->len, nm->name, ubifs_inode(inode)->data_len,
+ dir->i_ino);
+ ubifs_assert(ubifs_inode(dir)->data_len == 0);
+
+ dlen = UBIFS_DENT_NODE_SZ + nm->len + 1;
+ ilen = UBIFS_INO_NODE_SZ;
+
+ /*
+ * If the last reference to the inode is being deleted, then there is no
+ * need to attach and write inode data, it is being deleted anyway.
+ */
+ if (!last_reference)
+ ilen += ubifs_inode(inode)->data_len;
+
+ aligned_dlen = ALIGN(dlen, 8);
+ aligned_ilen = ALIGN(ilen, 8);
+
+ len = aligned_dlen + aligned_ilen + UBIFS_INO_NODE_SZ;
+
+ dent = kmalloc(len, GFP_NOFS);
+ if (!dent)
+ return -ENOMEM;
+
+ /* Make reservation before allocating sequence numbers */
+ err = make_reservation(c, BASEHD, len);
+ if (err)
+ goto out_free;
+
+ if (!xent) {
+ dent->ch.node_type = UBIFS_DENT_NODE;
+ dent_key_init(c, &dent_key, dir->i_ino, nm);
+ } else {
+ dent->ch.node_type = UBIFS_XENT_NODE;
+ xent_key_init(c, &dent_key, dir->i_ino, nm);
+ }
+
+ key_write(c, &dent_key, dent->key);
+ dent->inum = deletion ? 0 : cpu_to_le64(inode->i_ino);
+ dent->type = get_dent_type(inode->i_mode);
+ dent->nlen = cpu_to_le16(nm->len);
+ memcpy(dent->name, nm->name, nm->len);
+ dent->name[nm->len] = '\0';
+ zero_dent_node_unused(dent);
+ ubifs_prep_grp_node(c, dent, dlen, 0);
+
+ ino = (void *)dent + aligned_dlen;
+ pack_inode(c, ino, inode, 0, last_reference);
+
+ ino = (void *)ino + aligned_ilen;
+ pack_inode(c, ino, dir, 1, 0);
+
+ if (last_reference) {
+ err = ubifs_add_orphan(c, inode->i_ino);
+ if (err) {
+ release_head(c, BASEHD);
+ goto out_finish;
+ }
+ }
+
+ err = write_head(c, BASEHD, dent, len, &lnum, &dent_offs, sync);
+ if (!sync && !err) {
+ struct ubifs_wbuf *wbuf = &c->jheads[BASEHD].wbuf;
+
+ ubifs_wbuf_add_ino_nolock(wbuf, inode->i_ino);
+ ubifs_wbuf_add_ino_nolock(wbuf, dir->i_ino);
+ }
+ release_head(c, BASEHD);
+ kfree(dent);
+ if (err)
+ goto out_ro;
+
+ if (deletion) {
+ err = ubifs_tnc_remove_nm(c, &dent_key, nm);
+ if (err)
+ goto out_ro;
+ err = ubifs_add_dirt(c, lnum, dlen);
+ } else
+ err = ubifs_tnc_add_nm(c, &dent_key, lnum, dent_offs, dlen, nm);
+ if (err)
+ goto out_ro;
+
+ /*
+ * Note, we do not remove the inode from TNC even if the last reference
+ * to it has just been deleted, because the inode may still be opened.
+ * Instead, the inode has been added to orphan lists and the orphan
+ * subsystem will take further care about it.
+ */
+ ino_key_init(c, &ino_key, inode->i_ino);
+ ino_offs = dent_offs + aligned_dlen;
+ err = ubifs_tnc_add(c, &ino_key, lnum, ino_offs, ilen);
+ if (err)
+ goto out_ro;
+
+ ino_key_init(c, &ino_key, dir->i_ino);
+ ino_offs += aligned_ilen;
+ err = ubifs_tnc_add(c, &ino_key, lnum, ino_offs, UBIFS_INO_NODE_SZ);
+ if (err)
+ goto out_ro;
+
+ finish_reservation(c);
+ return 0;
+
+out_finish:
+ finish_reservation(c);
+out_free:
+ kfree(dent);
+ return err;
+
+out_ro:
+ ubifs_ro_mode(c, err);
+ if (last_reference)
+ ubifs_delete_orphan(c, inode->i_ino);
+ finish_reservation(c);
+ return err;
+}
+
+/**
+ * ubifs_jnl_write_data - write a data node to the journal.
+ * @c: UBIFS file-system description object
+ * @inode: inode the data node belongs to
+ * @key: node key
+ * @buf: buffer to write
+ * @len: data length (must not exceed %UBIFS_BLOCK_SIZE)
+ *
+ * This function writes a data node to the journal. Returns %0 if the data node
+ * was successfully written, and a negative error code in case of failure.
+ */
+int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
+ const union ubifs_key *key, const void *buf, int len)
+{
+ int err, lnum, offs, compr_type, out_len;
+ int dlen = UBIFS_DATA_NODE_SZ + UBIFS_BLOCK_SIZE * WORST_COMPR_FACTOR;
+ const struct ubifs_inode *ui = ubifs_inode(inode);
+ struct ubifs_data_node *data;
+
+ dbg_jnl("ino %lu, blk %u, len %d, key %s", key_inum(c, key),
+ key_block(c, key), len, DBGKEY(key));
+ ubifs_assert(len <= UBIFS_BLOCK_SIZE);
+
+ data = kmalloc(dlen, GFP_NOFS);
+ if (!data)
+ return -ENOMEM;
+
+ data->ch.node_type = UBIFS_DATA_NODE;
+ key_write(c, key, &data->key);
+ data->size = cpu_to_le32(len);
+ zero_data_node_unused(data);
+
+ if (!(ui->flags && UBIFS_COMPR_FL))
+ /* Compression is disabled for this inode */
+ compr_type = UBIFS_COMPR_NONE;
+ else
+ compr_type = ui->compr_type;
+
+ out_len = dlen - UBIFS_DATA_NODE_SZ;
+ ubifs_compress(buf, len, &data->data, &out_len, &compr_type);
+ ubifs_assert(out_len <= UBIFS_BLOCK_SIZE);
+
+ dlen = UBIFS_DATA_NODE_SZ + out_len;
+ data->compr_type = cpu_to_le16(compr_type);
+
+ /* Make reservation before allocating sequence numbers */
+ err = make_reservation(c, DATAHD, dlen);
+ if (err)
+ goto out_free;
+
+ err = write_node(c, DATAHD, data, dlen, &lnum, &offs);
+ if (!err)
+ ubifs_wbuf_add_ino_nolock(&c->jheads[DATAHD].wbuf,
+ key_inum(c, key));
+ release_head(c, DATAHD);
+ if (err)
+ goto out_ro;
+
+ err = ubifs_tnc_add(c, key, lnum, offs, dlen);
+ if (err)
+ goto out_ro;
+
+ finish_reservation(c);
+ kfree(data);
+ return 0;
+
+out_ro:
+ ubifs_ro_mode(c, err);
+ finish_reservation(c);
+out_free:
+ kfree(data);
+ return err;
+}
+
+/**
+ * ubifs_jnl_write_inode - flush inode to the journal.
+ * @c: UBIFS file-system description object
+ * @inode: inode to flush
+ * @last_reference: inode has been deleted
+ * @sync: non-zero if the write-buffer has to be synchronized
+ *
+ * This function writes inode @inode to the journal (to the base head). Returns
+ * zero in case of success and a negative error code in case of failure.
+ */
+int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode,
+ int last_reference, int sync)
+{
+ int err, len, lnum, offs;
+ struct ubifs_ino_node *ino;
+ struct ubifs_inode *ui = ubifs_inode(inode);
+
+ dbg_jnl("ino %lu%s", inode->i_ino,
+ last_reference ? " (last reference)" : "");
+ if (last_reference)
+ ubifs_assert(inode->i_nlink == 0);
+
+ /* If the inode is deleted, do not write the attached data */
+ len = UBIFS_INO_NODE_SZ;
+ if (!last_reference)
+ len += ui->data_len;
+ ino = kmalloc(len, GFP_NOFS);
+ if (!ino)
+ return -ENOMEM;
+
+ /* Make reservation before allocating sequence numbers */
+ err = make_reservation(c, BASEHD, len);
+ if (err)
+ goto out_free;
+
+ pack_inode(c, ino, inode, 1, last_reference);
+
+ err = write_head(c, BASEHD, ino, len, &lnum, &offs, sync);
+ if (!sync && !err)
+ ubifs_wbuf_add_ino_nolock(&c->jheads[BASEHD].wbuf,
+ inode->i_ino);
+ release_head(c, BASEHD);
+ if (err)
+ goto out_ro;
+
+ if (last_reference) {
+ err = ubifs_tnc_remove_ino(c, inode->i_ino);
+ if (err)
+ goto out_ro;
+ ubifs_delete_orphan(c, inode->i_ino);
+ err = ubifs_add_dirt(c, lnum, len);
+ } else {
+ union ubifs_key key;
+
+ ino_key_init(c, &key, inode->i_ino);
+ err = ubifs_tnc_add(c, &key, lnum, offs, len);
+ }
+ if (err)
+ goto out_ro;
+
+ finish_reservation(c);
+ kfree(ino);
+ return 0;
+
+out_ro:
+ ubifs_ro_mode(c, err);
+ finish_reservation(c);
+out_free:
+ kfree(ino);
+ return err;
+}
+
+/**
+ * ubifs_jnl_rename - rename a directory entry.
+ * @c: UBIFS file-system description object
+ * @old_dir: parent inode of directory entry to rename
+ * @old_dentry: directory entry to rename
+ * @new_dir: parent inode of directory entry to rename
+ * @new_dentry: new directory entry (or directory entry to replace)
+ * @sync: non-zero if the write-buffer has to be synchronized
+ *
+ * Returns zero in case of success and a negative error code in case of failure.
+ */
+int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
+ const struct dentry *old_dentry,
+ const struct inode *new_dir,
+ const struct dentry *new_dentry, int sync)
+{
+ const struct inode *old_inode = old_dentry->d_inode;
+ const struct inode *new_inode = new_dentry->d_inode;
+ int err, dlen1, dlen2, ilen, lnum, offs, len;
+ int aligned_dlen1, aligned_dlen2, plen = UBIFS_INO_NODE_SZ;
+ int last_reference = !!(new_inode && new_inode->i_nlink == 0);
+ struct ubifs_dent_node *dent, *dent2;
+ void *p;
+ union ubifs_key key;
+
+ dbg_jnl("dent '%.*s' in dir ino %lu to dent '%.*s' in dir ino %lu",
+ old_dentry->d_name.len, old_dentry->d_name.name,
+ old_dir->i_ino, new_dentry->d_name.len,
+ new_dentry->d_name.name, new_dir->i_ino);
+
+ ubifs_assert(ubifs_inode(old_dir)->data_len == 0);
+ ubifs_assert(ubifs_inode(new_dir)->data_len == 0);
+
+ dlen1 = UBIFS_DENT_NODE_SZ + new_dentry->d_name.len + 1;
+ dlen2 = UBIFS_DENT_NODE_SZ + old_dentry->d_name.len + 1;
+ if (new_inode) {
+ ilen = UBIFS_INO_NODE_SZ;
+ if (!last_reference)
+ ilen += ubifs_inode(new_inode)->data_len;
+ } else
+ ilen = 0;
+
+ aligned_dlen1 = ALIGN(dlen1, 8);
+ aligned_dlen2 = ALIGN(dlen2, 8);
+
+ len = aligned_dlen1 + aligned_dlen2 + ALIGN(ilen, 8) + ALIGN(plen, 8);
+ if (old_dir != new_dir)
+ len += plen;
+
+ dent = kmalloc(len, GFP_NOFS);
+ if (!dent)
+ return -ENOMEM;
+
+ /* Make reservation before allocating sequence numbers */
+ err = make_reservation(c, BASEHD, len);
+ if (err)
+ goto out_free;
+
+ /* Make new dent */
+ dent->ch.node_type = UBIFS_DENT_NODE;
+ dent_key_init_flash(c, &dent->key, new_dir->i_ino, &new_dentry->d_name);
+ dent->inum = cpu_to_le64(old_inode->i_ino);
+ dent->type = get_dent_type(old_inode->i_mode);
+ dent->nlen = cpu_to_le16(new_dentry->d_name.len);
+ memcpy(dent->name, new_dentry->d_name.name, new_dentry->d_name.len);
+ dent->name[new_dentry->d_name.len] = '\0';
+ zero_dent_node_unused(dent);
+ ubifs_prep_grp_node(c, dent, dlen1, 0);
+
+ dent2 = (void *)dent + aligned_dlen1;
+
+ /* Make deletion dent */
+ dent2->ch.node_type = UBIFS_DENT_NODE;
+ dent_key_init_flash(c, &dent2->key, old_dir->i_ino,
+ &old_dentry->d_name);
+ dent2->inum = 0;
+ dent2->type = DT_UNKNOWN;
+ dent2->nlen = cpu_to_le16(old_dentry->d_name.len);
+ memcpy(dent2->name, old_dentry->d_name.name, old_dentry->d_name.len);
+ dent2->name[old_dentry->d_name.len] = '\0';
+ zero_dent_node_unused(dent2);
+ ubifs_prep_grp_node(c, dent2, dlen2, 0);
+
+ p = (void *)dent2 + aligned_dlen2;
+ if (new_inode) {
+ pack_inode(c, p, new_inode, 0, last_reference);
+ p += ALIGN(ilen, 8);
+ }
+
+ if (old_dir == new_dir)
+ pack_inode(c, p, old_dir, 1, 0);
+ else {
+ pack_inode(c, p, old_dir, 0, 0);
+ p += ALIGN(plen, 8);
+ pack_inode(c, p, new_dir, 1, 0);
+ }
+
+ if (last_reference) {
+ err = ubifs_add_orphan(c, new_inode->i_ino);
+ if (err) {
+ release_head(c, BASEHD);
+ goto out_finish;
+ }
+ }
+
+ err = write_head(c, BASEHD, dent, len, &lnum, &offs, sync);
+ if (!sync && !err) {
+ struct ubifs_wbuf *wbuf = &c->jheads[BASEHD].wbuf;
+
+ ubifs_wbuf_add_ino_nolock(wbuf, new_dir->i_ino);
+ ubifs_wbuf_add_ino_nolock(wbuf, old_dir->i_ino);
+ if (new_inode)
+ ubifs_wbuf_add_ino_nolock(&c->jheads[BASEHD].wbuf,
+ new_inode->i_ino);
+ }
+ release_head(c, BASEHD);
+ if (err)
+ goto out_ro;
+
+ dent_key_init(c, &key, new_dir->i_ino, &new_dentry->d_name);
+ err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen1, &new_dentry->d_name);
+ if (err)
+ goto out_ro;
+
+ err = ubifs_add_dirt(c, lnum, dlen2);
+ if (err)
+ goto out_ro;
+
+ dent_key_init(c, &key, old_dir->i_ino, &old_dentry->d_name);
+ err = ubifs_tnc_remove_nm(c, &key, &old_dentry->d_name);
+ if (err)
+ goto out_ro;
+
+ offs += aligned_dlen1 + aligned_dlen2;
+ if (new_inode) {
+ ino_key_init(c, &key, new_inode->i_ino);
+ err = ubifs_tnc_add(c, &key, lnum, offs, ilen);
+ if (err)
+ goto out_ro;
+ offs += ALIGN(ilen, 8);
+ }
+
+ ino_key_init(c, &key, old_dir->i_ino);
+ err = ubifs_tnc_add(c, &key, lnum, offs, plen);
+ if (err)
+ goto out_ro;
+
+ if (old_dir != new_dir) {
+ offs += ALIGN(plen, 8);
+ ino_key_init(c, &key, new_dir->i_ino);
+ err = ubifs_tnc_add(c, &key, lnum, offs, plen);
+ if (err)
+ goto out_ro;
+ }
+
+ finish_reservation(c);
+ kfree(dent);
+ return 0;
+
+out_ro:
+ ubifs_ro_mode(c, err);
+ if (last_reference)
+ ubifs_delete_orphan(c, new_inode->i_ino);
+out_finish:
+ finish_reservation(c);
+out_free:
+ kfree(dent);
+ return err;
+}
+
+/**
+ * recomp_data_node - re-compress a truncated data node.
+ * @dn: data node to re-compress
+ * @new_len: new length
+ *
+ * This function is used when an inode is truncated and the last data node of
+ * the inode has to be re-compressed and re-written.
+ */
+static int recomp_data_node(struct ubifs_data_node *dn, int *new_len)
+{
+ void *buf;
+ int err, len, compr_type, out_len;
+
+ out_len = le32_to_cpu(dn->size);
+ buf = kmalloc(out_len * WORST_COMPR_FACTOR, GFP_NOFS);
+ if (!buf)
+ return -ENOMEM;
+
+ len = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ;
+ compr_type = le16_to_cpu(dn->compr_type);
+ err = ubifs_decompress(&dn->data, len, buf, &out_len, compr_type);
+ if (err)
+ goto out;
+
+ ubifs_compress(buf, *new_len, &dn->data, &out_len, &compr_type);
+ ubifs_assert(out_len <= UBIFS_BLOCK_SIZE);
+ dn->compr_type = cpu_to_le16(compr_type);
+ dn->size = cpu_to_le32(*new_len);
+ *new_len = UBIFS_DATA_NODE_SZ + out_len;
+out:
+ kfree(buf);
+ return err;
+}
+
+/**
+ * ubifs_jnl_truncate - update the journal for a truncation.
+ * @c: UBIFS file-system description object
+ * @inum: inode number of inode being truncated
+ * @old_size: old size
+ * @new_size: new size
+ *
+ * When the size of a file decreases due to truncation, a truncation node is
+ * written, the journal tree is updated, and the last data block is re-written
+ * if it has been affected.
+ *
+ * This function returns %0 in the case of success, and a negative error code in
+ * case of failure.
+ */
+int ubifs_jnl_truncate(struct ubifs_info *c, ino_t inum,
+ loff_t old_size, loff_t new_size)
+{
+ union ubifs_key key, to_key;
+ struct ubifs_trun_node *trun;
+ struct ubifs_data_node *uninitialized_var(dn);
+ int err, dlen, len, lnum, offs, bit, sz;
+ unsigned int blk;
+
+ dbg_jnl("ino %lu, size %lld -> %lld", inum, old_size, new_size);
+
+ sz = UBIFS_TRUN_NODE_SZ + UBIFS_MAX_DATA_NODE_SZ * WORST_COMPR_FACTOR;
+ trun = kmalloc(sz, GFP_NOFS);
+ if (!trun)
+ return -ENOMEM;
+
+ trun->ch.node_type = UBIFS_TRUN_NODE;
+ trun->inum = cpu_to_le32(inum);
+ trun->old_size = cpu_to_le64(old_size);
+ trun->new_size = cpu_to_le64(new_size);
+ zero_trun_node_unused(trun);
+
+ dlen = new_size & (UBIFS_BLOCK_SIZE - 1);
+
+ if (dlen) {
+ /* Get last data block so it can be truncated */
+ dn = (void *)trun + ALIGN(UBIFS_TRUN_NODE_SZ, 8);
+ blk = new_size / UBIFS_BLOCK_SIZE;
+ data_key_init(c, &key, inum, blk);
+ dbg_jnl("last block key %s", DBGKEY(&key));
+ err = ubifs_tnc_lookup(c, &key, dn);
+ if (err == -ENOENT)
+ dlen = 0; /* Not found (so it is a hole) */
+ else if (err)
+ goto out_free;
+ else {
+ if (le32_to_cpu(dn->size) <= dlen)
+ dlen = 0; /* Nothing to do */
+ else {
+ int compr_type = le16_to_cpu(dn->compr_type);
+
+ if (compr_type != UBIFS_COMPR_NONE) {
+ err = recomp_data_node(dn, &dlen);
+ if (err)
+ goto out_free;
+ } else {
+ dn->size = cpu_to_le32(dlen);
+ dlen += UBIFS_DATA_NODE_SZ;
+ }
+ zero_data_node_unused(dn);
+ }
+ }
+ }
+
+ if (dlen)
+ len = ALIGN(UBIFS_TRUN_NODE_SZ, 8) + dlen;
+ else
+ len = UBIFS_TRUN_NODE_SZ;
+
+ /* Must make reservation before allocating sequence numbers */
+ err = make_reservation(c, BASEHD, len);
+ if (err)
+ goto out_free;
+
+ ubifs_prepare_node(c, trun, UBIFS_TRUN_NODE_SZ, 0);
+ if (dlen)
+ ubifs_prepare_node(c, dn, dlen, 0);
+
+ err = write_head(c, BASEHD, trun, len, &lnum, &offs, 0);
+ if (!err)
+ ubifs_wbuf_add_ino_nolock(&c->jheads[BASEHD].wbuf, inum);
+ release_head(c, BASEHD);
+ if (err)
+ goto out_ro;
+
+ if (dlen) {
+ offs += ALIGN(UBIFS_TRUN_NODE_SZ, 8);
+ err = ubifs_tnc_add(c, &key, lnum, offs, dlen);
+ if (err)
+ goto out_ro;
+ }
+
+ err = ubifs_add_dirt(c, lnum, UBIFS_TRUN_NODE_SZ);
+ if (err)
+ goto out_ro;
+
+ bit = new_size & (UBIFS_BLOCK_SIZE - 1);
+
+ blk = new_size / UBIFS_BLOCK_SIZE + (bit ? 1 : 0);
+ data_key_init(c, &key, inum, blk);
+
+ bit = old_size & (UBIFS_BLOCK_SIZE - 1);
+
+ blk = old_size / UBIFS_BLOCK_SIZE - (bit ? 0: 1);
+ data_key_init(c, &to_key, inum, blk);
+
+ err = ubifs_tnc_remove_range(c, &key, &to_key);
+ if (err)
+ goto out_ro;
+
+ finish_reservation(c);
+ kfree(trun);
+ return 0;
+
+out_ro:
+ ubifs_ro_mode(c, err);
+ finish_reservation(c);
+out_free:
+ kfree(trun);
+ return err;
+}
+
+#ifdef CONFIG_UBIFS_FS_XATTR
+
+int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host,
+ const struct inode *inode, const struct qstr *nm,
+ int sync)
+{
+ int err, xlen, hlen, len, lnum, xent_offs, aligned_xlen;
+ struct ubifs_dent_node *xent;
+ struct ubifs_ino_node *ino;
+ union ubifs_key xent_key, key1, key2;
+
+ dbg_jnl("host %lu, xattr ino %lu, name '%s', data len %d",
+ host->i_ino, inode->i_ino, nm->name,
+ ubifs_inode(inode)->data_len);
+ ubifs_assert(inode->i_nlink == 0);
+
+ /*
+ * Since we are deleting the inode, we do not bother to attach any data
+ * to it and assume its length is %UBIFS_INO_NODE_SZ.
+ */
+ xlen = UBIFS_DENT_NODE_SZ + nm->len + 1;
+ aligned_xlen = ALIGN(xlen, 8);
+ hlen = ubifs_inode(host)->data_len + UBIFS_INO_NODE_SZ;
+ len = aligned_xlen + UBIFS_INO_NODE_SZ + ALIGN(hlen, 8);
+
+ xent = kmalloc(len, GFP_NOFS);
+ if (!xent)
+ return -ENOMEM;
+
+ /* Make reservation before allocating sequence numbers */
+ err = make_reservation(c, BASEHD, len);
+ if (err) {
+ kfree(xent);
+ return err;
+ }
+
+ xent->ch.node_type = UBIFS_XENT_NODE;
+ xent_key_init(c, &xent_key, host->i_ino, nm);
+ key_write(c, &xent_key, xent->key);
+ xent->inum = 0;
+ xent->type = get_dent_type(inode->i_mode);
+ xent->nlen = cpu_to_le16(nm->len);
+ memcpy(xent->name, nm->name, nm->len);
+ xent->name[nm->len] = '\0';
+ zero_dent_node_unused(xent);
+ ubifs_prep_grp_node(c, xent, xlen, 0);
+
+ ino = (void *)xent + aligned_xlen;
+ pack_inode(c, ino, inode, 0, 1);
+
+ ino = (void *)ino + UBIFS_INO_NODE_SZ;
+ pack_inode(c, ino, host, 1, 0);
+
+ err = write_head(c, BASEHD, xent, len, &lnum, &xent_offs, sync);
+ if (!sync && !err)
+ ubifs_wbuf_add_ino_nolock(&c->jheads[BASEHD].wbuf, host->i_ino);
+ release_head(c, BASEHD);
+ kfree(xent);
+ if (err)
+ goto out_ro;
+
+ /* Remove the extended attribute entry from TNC */
+ err = ubifs_tnc_remove_nm(c, &xent_key, nm);
+ if (err)
+ goto out_ro;
+ err = ubifs_add_dirt(c, lnum, xlen);
+ if (err)
+ goto out_ro;
+
+ /*
+ * Remove all nodes belonging to the extended attribute inode from TNC.
+ * Well, there actually must be only one node - the inode itself.
+ */
+ lowest_ino_key(c, &key1, inode->i_ino);
+ highest_ino_key(c, &key2, inode->i_ino);
+ err = ubifs_tnc_remove_range(c, &key1, &key2);
+ if (err)
+ goto out_ro;
+ err = ubifs_add_dirt(c, lnum, UBIFS_INO_NODE_SZ);
+ if (err)
+ goto out_ro;
+
+ /* And update TNC with the new host inode position */
+ ino_key_init(c, &key1, host->i_ino);
+ err = ubifs_tnc_add(c, &key1, lnum, xent_offs + len - hlen, hlen);
+ if (err)
+ goto out_ro;
+
+ finish_reservation(c);
+ return 0;
+
+out_ro:
+ ubifs_ro_mode(c, err);
+ finish_reservation(c);
+ return err;
+}
+
+/**
+ * ubifs_jnl_write_2_inodes - write 2 inodes to the journal.
+ * @c: UBIFS file-system description object
+ * @inode1: first inode to write
+ * @inode2: second inode to write
+ * @sync: non-zero if the write-buffer has to be synchronized
+ *
+ * This function writes 2 inodes @inode1 and @inode2 to the journal (to the
+ * base head - first @inode1, then @inode2). Returns zero in case of success
+ * and a negative error code in case of failure.
+ */
+int ubifs_jnl_write_2_inodes(struct ubifs_info *c, const struct inode *inode1,
+ const struct inode *inode2, int sync)
+{
+ int err, len1, len2, aligned_len, aligned_len1, lnum, offs;
+ struct ubifs_ino_node *ino;
+ union ubifs_key key;
+
+ dbg_jnl("ino %lu, ino %lu", inode1->i_ino, inode2->i_ino);
+ ubifs_assert(inode1->i_nlink > 0);
+ ubifs_assert(inode2->i_nlink > 0);
+
+ len1 = UBIFS_INO_NODE_SZ + ubifs_inode(inode1)->data_len;
+ len2 = UBIFS_INO_NODE_SZ + ubifs_inode(inode2)->data_len;
+ aligned_len1 = ALIGN(len1, 8);
+ aligned_len = aligned_len1 + ALIGN(len2, 8);
+
+ ino = kmalloc(aligned_len, GFP_NOFS);
+ if (!ino)
+ return -ENOMEM;
+
+ /* Make reservation before allocating sequence numbers */
+ err = make_reservation(c, BASEHD, aligned_len);
+ if (err)
+ goto out_free;
+
+ pack_inode(c, ino, inode1, 0, 0);
+ pack_inode(c, (void *)ino + aligned_len1, inode2, 1, 0);
+
+ err = write_head(c, BASEHD, ino, aligned_len, &lnum, &offs, 0);
+ if (!sync && !err) {
+ struct ubifs_wbuf *wbuf = &c->jheads[BASEHD].wbuf;
+
+ ubifs_wbuf_add_ino_nolock(wbuf, inode1->i_ino);
+ ubifs_wbuf_add_ino_nolock(wbuf, inode2->i_ino);
+ }
+ release_head(c, BASEHD);
+ if (err)
+ goto out_ro;
+
+ ino_key_init(c, &key, inode1->i_ino);
+ err = ubifs_tnc_add(c, &key, lnum, offs, len1);
+ if (err)
+ goto out_ro;
+
+ ino_key_init(c, &key, inode2->i_ino);
+ err = ubifs_tnc_add(c, &key, lnum, offs + aligned_len1, len2);
+ if (err)
+ goto out_ro;
+
+ finish_reservation(c);
+ kfree(ino);
+ return 0;
+
+out_ro:
+ ubifs_ro_mode(c, err);
+ finish_reservation(c);
+out_free:
+ kfree(ino);
+ return err;
+}
+
+#endif /* CONFIG_UBIFS_FS_XATTR */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/Kconfig avr32-2.6/fs/ubifs/Kconfig
--- linux-2.6.25.6/fs/ubifs/Kconfig 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/Kconfig 2008-06-12 15:09:45.311815896 +0200
@@ -0,0 +1,72 @@
+config UBIFS_FS
+ tristate "UBIFS file system support"
+ select CRC16
+ select CRC32
+ select CRYPTO if UBIFS_FS_ADVANCED_COMPR
+ select CRYPTO if UBIFS_FS_LZO
+ select CRYPTO if UBIFS_FS_ZLIB
+ select CRYPTO_LZO if UBIFS_FS_LZO
+ select CRYPTO_DEFLATE if UBIFS_FS_ZLIB
+ depends on MTD_UBI
+ help
+ UBIFS is a file system for flash devices which works on top of UBI.
+
+config UBIFS_FS_XATTR
+ bool "Extended attributes support"
+ depends on UBIFS_FS
+ help
+ This option enables support of extended attributes.
+
+config UBIFS_FS_ADVANCED_COMPR
+ bool "Advanced compression options"
+ depends on UBIFS_FS
+ help
+ This option allows to explicitly choose which compressions, if any,
+ are enabled in UBIFS. Removing compressors means inbility to read
+ existing file systems.
+
+ If unsure, say 'N'.
+
+config UBIFS_FS_LZO
+ bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR
+ depends on UBIFS_FS
+ default y
+ help
+ LZO compressor is generally faster then zlib but compresses worse.
+ Say 'Y' if unsure.
+
+config UBIFS_FS_ZLIB
+ bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR
+ depends on UBIFS_FS
+ default y
+ help
+ Zlib copresses better then LZO but it is slower. Say 'Y' if unsure.
+
+# Debugging-related stuff
+config UBIFS_FS_DEBUG
+ bool "Enable debugging"
+ depends on UBIFS_FS
+ select DEBUG_FS
+ select KALLSYMS_ALL
+ help
+ This option enables UBIFS debugging.
+
+config UBIFS_FS_DEBUG_MSG_LVL
+ int "Default message level (0 = no extra messages, 3 = lots)"
+ depends on UBIFS_FS_DEBUG
+ default "0"
+ help
+ This controls the amount of debugging messages produced by UBIFS.
+ If reporting bugs, please try to have available a full dump of the
+ messages at level 1 while the misbehaviour was occurring. Level 2
+ may become necessary if level 1 messages were not enough to find the
+ bug. Generally Level 3 should be avoided.
+
+config UBIFS_FS_DEBUG_CHKS
+ bool "Enable extra checks"
+ depends on UBIFS_FS_DEBUG
+ help
+ If extra checks are enabled UBIFS will check the consistency of its
+ internal data structures during operation. However, UBIFS performance
+ is dramatically slower when this option is selected especially if the
+ file system is large.
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/key.h avr32-2.6/fs/ubifs/key.h
--- linux-2.6.25.6/fs/ubifs/key.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/key.h 2008-06-12 15:09:45.367815766 +0200
@@ -0,0 +1,533 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This header contains various key-related definitions and helper function.
+ * UBIFS allows several key schemes, so we access key fields only via these
+ * helpers. At the moment only one key scheme is supported.
+ *
+ * Simple key scheme
+ * ~~~~~~~~~~~~~~~~~
+ *
+ * Keys are 64-bits long. First 32-bits are inode number (parent inode number
+ * in case of direntry key). Next 3 bits are node type. The last 29 bits are
+ * 4KiB offset in case of inode node, and direntry hash in case of a direntry
+ * node. We use "r5" hash borrowed from reiserfs.
+ */
+
+#ifndef __UBIFS_KEY_H__
+#define __UBIFS_KEY_H__
+
+/**
+ * key_r5_hash - R5 hash function (borrowed from reiserfs).
+ * @s: direntry name
+ * @len: name length
+ */
+static inline uint32_t key_r5_hash(const char *s, int len)
+{
+ uint32_t a = 0;
+ const signed char *str = (const signed char *)s;
+
+ while (*str) {
+ a += *str << 4;
+ a += *str >> 4;
+ a *= 11;
+ str++;
+ }
+
+ a &= UBIFS_S_KEY_HASH_MASK;
+
+ /*
+ * We use hash values as offset in directories, so values %0 and %1 are
+ * reserved for "." and "..". %2 is reserved for "end of readdir"
+ * marker.
+ */
+ if (unlikely(a >= 0 && a <= 2))
+ a += 3;
+ return a;
+}
+
+/**
+ * key_test_hash - testing hash function.
+ * @str: direntry name
+ * @len: name length
+ */
+static inline uint32_t key_test_hash(const char *str, int len)
+{
+ uint32_t a = 0;
+
+ len = min_t(uint32_t, len, 4);
+ memcpy(&a, str, len);
+ a &= UBIFS_S_KEY_HASH_MASK;
+ if (unlikely(a >= 0 && a <= 2))
+ a += 3;
+ return a;
+}
+
+/**
+ * ino_key_init - initialize inode key.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ * @inum: inode number
+ */
+static inline void ino_key_init(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum)
+{
+ key->u32[0] = inum;
+ key->u32[1] = UBIFS_INO_KEY << UBIFS_S_KEY_BLOCK_BITS;
+}
+
+/**
+ * ino_key_init_flash - initialize on-flash inode key.
+ * @c: UBIFS file-system description object
+ * @k: key to initialize
+ * @inum: inode number
+ */
+static inline void ino_key_init_flash(const struct ubifs_info *c, void *k,
+ ino_t inum)
+{
+ union ubifs_key *key = k;
+
+ key->j32[0] = cpu_to_le32(inum);
+ key->j32[1] = cpu_to_le32(UBIFS_INO_KEY << UBIFS_S_KEY_BLOCK_BITS);
+ memset(k + 8, 0, UBIFS_MAX_KEY_LEN - 8);
+}
+
+/**
+ * lowest_ino_key - get the lowest possible inode key.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ * @inum: inode number
+ */
+static inline void lowest_ino_key(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum)
+{
+ key->u32[0] = inum;
+ key->u32[1] = 0;
+}
+
+/**
+ * highest_ino_key - get the highest possible inode key.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ * @inum: inode number
+ */
+static inline void highest_ino_key(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum)
+{
+ key->u32[0] = inum;
+ key->u32[1] = 0xffffffff;
+}
+
+/**
+ * dent_key_init - initialize directory entry key.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ * @inum: parent inode number
+ * @nm: direntry name and length
+ */
+static inline void dent_key_init(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum,
+ const struct qstr *nm)
+{
+ uint32_t hash = c->key_hash(nm->name, nm->len);
+
+ ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK));
+ key->u32[0] = inum;
+ key->u32[1] = hash | (UBIFS_DENT_KEY << UBIFS_S_KEY_HASH_BITS);
+}
+
+/**
+ * dent_key_init_hash - initialize directory entry key without re-calculating
+ * hash function.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ * @inum: parent inode number
+ * @hash: direntry name hash
+ */
+static inline void dent_key_init_hash(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum,
+ uint32_t hash)
+{
+ ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK));
+ key->u32[0] = inum;
+ key->u32[1] = hash | (UBIFS_DENT_KEY << UBIFS_S_KEY_HASH_BITS);
+}
+
+/**
+ * dent_key_init_flash - initialize on-flash directory entry key.
+ * @c: UBIFS file-system description object
+ * @k: key to initialize
+ * @inum: parent inode number
+ * @nm: direntry name and length
+ */
+static inline void dent_key_init_flash(const struct ubifs_info *c, void *k,
+ ino_t inum, const struct qstr *nm)
+{
+ union ubifs_key *key = k;
+ uint32_t hash = c->key_hash(nm->name, nm->len);
+
+ ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK));
+ key->j32[0] = cpu_to_le32(inum);
+ key->j32[1] = cpu_to_le32(hash |
+ (UBIFS_DENT_KEY << UBIFS_S_KEY_HASH_BITS));
+ memset(k + 8, 0, UBIFS_MAX_KEY_LEN - 8);
+}
+
+/**
+ * lowest_dent_key - get the lowest possible directory entry key.
+ * @c: UBIFS file-system description object
+ * @key: where to store the lowest key
+ * @inum: parent inode number
+ */
+static inline void lowest_dent_key(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum)
+{
+ key->u32[0] = inum;
+ key->u32[1] = UBIFS_DENT_KEY << UBIFS_S_KEY_HASH_BITS;
+}
+
+/**
+ * xent_key_init - initialize extended attribute entry key.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ * @inum: host inode number
+ * @nm: extended attribute entry name and length
+ */
+static inline void xent_key_init(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum,
+ const struct qstr *nm)
+{
+ uint32_t hash = c->key_hash(nm->name, nm->len);
+
+ ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK));
+ key->u32[0] = inum;
+ key->u32[1] = hash | (UBIFS_XENT_KEY << UBIFS_S_KEY_HASH_BITS);
+}
+
+/**
+ * xent_key_init_hash - initialize extended attribute entry key without
+ * re-calculating hash function.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ * @inum: host inode number
+ * @hash: extended attribute entry name hash
+ */
+static inline void xent_key_init_hash(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum,
+ uint32_t hash)
+{
+ ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK));
+ key->u32[0] = inum;
+ key->u32[1] = hash | (UBIFS_XENT_KEY << UBIFS_S_KEY_HASH_BITS);
+}
+
+/**
+ * xent_key_init_flash - initialize on-flash extended attribute entry key.
+ * @c: UBIFS file-system description object
+ * @k: key to initialize
+ * @inum: host inode number
+ * @nm: extended attribute entry name and length
+ */
+static inline void xent_key_init_flash(const struct ubifs_info *c, void *k,
+ ino_t inum, const struct qstr *nm)
+{
+ union ubifs_key *key = k;
+ uint32_t hash = c->key_hash(nm->name, nm->len);
+
+ ubifs_assert(!(hash & ~UBIFS_S_KEY_HASH_MASK));
+ key->j32[0] = cpu_to_le32(inum);
+ key->j32[1] = cpu_to_le32(hash |
+ (UBIFS_XENT_KEY << UBIFS_S_KEY_HASH_BITS));
+ memset(k + 8, 0, UBIFS_MAX_KEY_LEN - 8);
+}
+
+/**
+ * lowest_xent_key - get the lowest possible extended attribute entry key.
+ * @c: UBIFS file-system description object
+ * @key: where to store the lowest key
+ * @inum: host inode number
+ */
+static inline void lowest_xent_key(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum)
+{
+ key->u32[0] = inum;
+ key->u32[1] = UBIFS_XENT_KEY << UBIFS_S_KEY_HASH_BITS;
+}
+
+/**
+ * data_key_init - initialize data key.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ * @inum: inode number
+ * @block: block number
+ */
+static inline void data_key_init(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum,
+ unsigned int block)
+{
+ ubifs_assert(!(block & ~UBIFS_S_KEY_BLOCK_MASK));
+ key->u32[0] = inum;
+ key->u32[1] = block | (UBIFS_DATA_KEY << UBIFS_S_KEY_BLOCK_BITS);
+}
+
+/**
+ * data_key_init_flash - initialize on-flash data key.
+ * @c: UBIFS file-system description object
+ * @k: key to initialize
+ * @inum: inode number
+ * @block: block number
+ */
+static inline void data_key_init_flash(const struct ubifs_info *c, void *k,
+ ino_t inum, unsigned int block)
+{
+ union ubifs_key *key = k;
+
+ ubifs_assert(!(block & ~UBIFS_S_KEY_BLOCK_MASK));
+ key->j32[0] = cpu_to_le32(inum);
+ key->j32[1] = cpu_to_le32(block |
+ (UBIFS_DATA_KEY << UBIFS_S_KEY_BLOCK_BITS));
+ memset(k + 8, 0, UBIFS_MAX_KEY_LEN - 8);
+}
+
+/**
+ * trun_key_init - initialize truncation node key.
+ * @c: UBIFS file-system description object
+ * @key: key to initialize
+ * @inum: inode number
+ *
+ * Note, UBIFS does not have truncation keys on the media and this function is
+ * only used for purposes of replay.
+ */
+static inline void trun_key_init(const struct ubifs_info *c,
+ union ubifs_key *key, ino_t inum)
+{
+ key->u32[0] = inum;
+ key->u32[1] = UBIFS_TRUN_KEY << UBIFS_S_KEY_BLOCK_BITS;
+}
+
+/**
+ * key_type - get key type.
+ * @c: UBIFS file-system description object
+ * @key: key to get type of
+ */
+static inline int key_type(const struct ubifs_info *c,
+ const union ubifs_key *key)
+{
+ return key->u32[1] >> UBIFS_S_KEY_BLOCK_BITS;
+}
+
+/**
+ * key_type_flash - get type of a on-flash formatted key.
+ * @c: UBIFS file-system description object
+ * @k: key to get type of
+ */
+static inline int key_type_flash(const struct ubifs_info *c, const void *k)
+{
+ const union ubifs_key *key = k;
+
+ return le32_to_cpu(key->u32[1]) >> UBIFS_S_KEY_BLOCK_BITS;
+}
+
+/**
+ * key_inum - fetch inode number from key.
+ * @c: UBIFS file-system description object
+ * @k: key to fetch inode number from
+ */
+static inline ino_t key_inum(const struct ubifs_info *c, const void *k)
+{
+ const union ubifs_key *key = k;
+
+ return key->u32[0];
+}
+
+/**
+ * key_inum_flash - fetch inode number from an on-flash formatted key.
+ * @c: UBIFS file-system description object
+ * @k: key to fetch inode number from
+ */
+static inline ino_t key_inum_flash(const struct ubifs_info *c, const void *k)
+{
+ const union ubifs_key *key = k;
+
+ return le32_to_cpu(key->j32[0]);
+}
+
+/**
+ * key_hash - get directory entry hash.
+ * @c: UBIFS file-system description object
+ * @key: the key to get hash from
+ */
+static inline int key_hash(const struct ubifs_info *c,
+ const union ubifs_key *key)
+{
+ return key->u32[1] & UBIFS_S_KEY_HASH_MASK;
+}
+
+/**
+ * key_hash_flash - get directory entry hash from an on-flash formatted key.
+ * @c: UBIFS file-system description object
+ * @k: the key to get hash from
+ */
+static inline int key_hash_flash(const struct ubifs_info *c, const void *k)
+{
+ const union ubifs_key *key = k;
+
+ return le32_to_cpu(key->j32[1]) & UBIFS_S_KEY_HASH_MASK;
+}
+
+/**
+ * key_block - get data block number.
+ * @c: UBIFS file-system description object
+ * @key: the key to get the block number from
+ */
+static inline unsigned int key_block(const struct ubifs_info *c,
+ const union ubifs_key *key)
+{
+ return key->u32[1] & UBIFS_S_KEY_BLOCK_MASK;
+}
+
+/**
+ * key_block_flash - get data block number from an on-flash formatted key.
+ * @c: UBIFS file-system description object
+ * @k: the key to get the block number from
+ */
+static inline unsigned int key_block_flash(const struct ubifs_info *c,
+ const void *k)
+{
+ const union ubifs_key *key = k;
+
+ return le32_to_cpu(key->u32[1]) & UBIFS_S_KEY_BLOCK_MASK;
+}
+
+/**
+ * key_read - transform a key to in-memory format.
+ * @c: UBIFS file-system description object
+ * @from: the key to transform
+ * @to: the key to store the result
+ */
+static inline void key_read(const struct ubifs_info *c, const void *from,
+ union ubifs_key *to)
+{
+ const union ubifs_key *f = from;
+
+ to->u32[0] = le32_to_cpu(f->j32[0]);
+ to->u32[1] = le32_to_cpu(f->j32[1]);
+}
+
+/**
+ * key_write - transform a key from in-memory format.
+ * @c: UBIFS file-system description object
+ * @from: the key to transform
+ * @to: the key to store the result
+ */
+static inline void key_write(const struct ubifs_info *c,
+ const union ubifs_key *from, void *to)
+{
+ union ubifs_key *t = to;
+
+ t->j32[0] = cpu_to_le32(from->u32[0]);
+ t->j32[1] = cpu_to_le32(from->u32[1]);
+ memset(to + 8, 0, UBIFS_MAX_KEY_LEN - 8);
+}
+
+/**
+ * key_write_idx - transform a key from in-memory format for the index.
+ * @c: UBIFS file-system description object
+ * @from: the key to transform
+ * @to: the key to store the result
+ */
+static inline void key_write_idx(const struct ubifs_info *c,
+ const union ubifs_key *from, void *to)
+{
+ union ubifs_key *t = to;
+
+ t->j32[0] = cpu_to_le32(from->u32[0]);
+ t->j32[1] = cpu_to_le32(from->u32[1]);
+}
+
+/**
+ * key_copy - copy a key.
+ * @c: UBIFS file-system description object
+ * @from: the key to copy from
+ * @to: the key to copy to
+ */
+static inline void key_copy(const struct ubifs_info *c,
+ const union ubifs_key *from, union ubifs_key *to)
+{
+ to->u64[0] = from->u64[0];
+}
+
+/**
+ * keys_cmp - compare keys.
+ * @c: UBIFS file-system description object
+ * @key1: the first key to compare
+ * @key2: the second key to compare
+ *
+ * This function compares 2 keys and returns %-1 if @key1 is less than
+ * @key2, 0 if the keys are equivalent and %1 if @key1 is greater than @key2.
+ */
+static inline int keys_cmp(const struct ubifs_info *c,
+ const union ubifs_key *key1,
+ const union ubifs_key *key2)
+{
+ if (key1->u32[0] < key2->u32[0])
+ return -1;
+ if (key1->u32[0] > key2->u32[0])
+ return 1;
+ if (key1->u32[1] < key2->u32[1])
+ return -1;
+ if (key1->u32[1] > key2->u32[1])
+ return 1;
+
+ return 0;
+}
+
+/**
+ * is_hash_key - is a key vulnerable to hash collisions.
+ * @c: UBIFS file-system description object
+ * @key: key
+ *
+ * This function returns %1 if @key is a hashed key or %0 otherwise.
+ */
+static inline int is_hash_key(const struct ubifs_info *c,
+ const union ubifs_key *key)
+{
+ int type = key_type(c, key);
+
+ return type == UBIFS_DENT_KEY || type == UBIFS_XENT_KEY;
+}
+
+/**
+ * key_max_inode_size - get maximum file size allowed by current key format.
+ * @c: UBIFS file-system description object
+ */
+static inline unsigned long long key_max_inode_size(const struct ubifs_info *c)
+{
+ switch (c->key_fmt) {
+ case UBIFS_SIMPLE_KEY_FMT:
+ return (1ULL << UBIFS_S_KEY_BLOCK_BITS) * UBIFS_BLOCK_SIZE;
+ default:
+ return 0;
+ }
+}
+#endif /* !__UBIFS_KEY_H__ */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/log.c avr32-2.6/fs/ubifs/log.c
--- linux-2.6.25.6/fs/ubifs/log.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/log.c 2008-06-12 15:09:45.367815766 +0200
@@ -0,0 +1,799 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file is a part of UBIFS journal implementation and contains various
+ * functions which manipulate the log. The log is a fixed area on the flash
+ * which does not contain any data but refers to buds. The log is a part of the
+ * journal.
+ */
+
+#include "ubifs.h"
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+static int dbg_check_bud_bytes(struct ubifs_info *c);
+#else
+#define dbg_check_bud_bytes(c) 0
+#endif
+
+/**
+ * ubifs_search_bud - search bud LEB.
+ * @c: UBIFS file-system description object
+ * @lnum: logical eraseblock number to search
+ *
+ * This function searches bud LEB @lnum. Returns bud description object in case
+ * of success and %NULL if there is no bud with this LEB number.
+ */
+struct ubifs_bud *ubifs_search_bud(struct ubifs_info *c, int lnum)
+{
+ struct rb_node *p;
+ struct ubifs_bud *bud;
+
+ spin_lock(&c->buds_lock);
+ p = c->buds.rb_node;
+ while (p) {
+ bud = rb_entry(p, struct ubifs_bud, rb);
+ if (lnum < bud->lnum)
+ p = p->rb_left;
+ else if (lnum > bud->lnum)
+ p = p->rb_right;
+ else {
+ spin_unlock(&c->buds_lock);
+ return bud;
+ }
+ }
+ spin_unlock(&c->buds_lock);
+ return NULL;
+}
+
+/**
+ * ubifs_get_wbuf - get the wbuf associated with a LEB, if there is one.
+ * @c: UBIFS file-system description object
+ * @lnum: logical eraseblock number to search
+ *
+ * This functions returns the wbuf for @lnum or %NULL if there is not one.
+ */
+struct ubifs_wbuf *ubifs_get_wbuf(struct ubifs_info *c, int lnum)
+{
+ struct rb_node *p;
+ struct ubifs_bud *bud;
+ int jhead;
+
+ if (!c->jheads)
+ return NULL;
+
+ spin_lock(&c->buds_lock);
+ p = c->buds.rb_node;
+ while (p) {
+ bud = rb_entry(p, struct ubifs_bud, rb);
+ if (lnum < bud->lnum)
+ p = p->rb_left;
+ else if (lnum > bud->lnum)
+ p = p->rb_right;
+ else {
+ jhead = bud->jhead;
+ spin_unlock(&c->buds_lock);
+ return &c->jheads[jhead].wbuf;
+ }
+ }
+ spin_unlock(&c->buds_lock);
+ return NULL;
+}
+
+/**
+ * next_log_lnum - switch to the next log LEB.
+ * @c: UBIFS file-system description object
+ * @lnum: current log LEB
+ */
+static inline int next_log_lnum(const struct ubifs_info *c, int lnum)
+{
+ lnum += 1;
+ if (lnum > c->log_last)
+ lnum = UBIFS_LOG_LNUM;
+
+ return lnum;
+}
+
+/**
+ * empty_log_bytes - calculate amount of empty space in the log.
+ * @c: UBIFS file-system description object
+ */
+static inline long long empty_log_bytes(const struct ubifs_info *c)
+{
+ long long h, t;
+
+ h = c->lhead_lnum * c->leb_size + c->lhead_offs;
+ t = c->ltail_lnum * c->leb_size;
+
+ if (h >= t)
+ return c->log_bytes - h + t;
+ else
+ return t - h;
+}
+
+/**
+ * ubifs_add_bud - add bud LEB to the tree of buds and its journal head list.
+ * @c: UBIFS file-system description object
+ * @bud: the bud to add
+ */
+void ubifs_add_bud(struct ubifs_info *c, struct ubifs_bud *bud)
+{
+ struct rb_node **p, *parent = NULL;
+ struct ubifs_bud *b;
+ struct ubifs_jhead *jhead;
+
+ spin_lock(&c->buds_lock);
+ p = &c->buds.rb_node;
+ while (*p) {
+ parent = *p;
+ b = rb_entry(parent, struct ubifs_bud, rb);
+ ubifs_assert(bud->lnum != b->lnum);
+ if (bud->lnum < b->lnum)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&bud->rb, parent, p);
+ rb_insert_color(&bud->rb, &c->buds);
+ if (c->jheads) {
+ jhead = &c->jheads[bud->jhead];
+ list_add_tail(&bud->list, &jhead->buds_list);
+ } else
+ ubifs_assert(c->replaying && (c->vfs_sb->s_flags & MS_RDONLY));
+
+ /*
+ * Note, although this is a new bud, we anyway account this space now,
+ * before any data has been written to it, because this is about to
+ * guarantee fixed mount time, and this bud will anyway be read and
+ * scanned.
+ */
+ c->bud_bytes += c->leb_size - bud->start;
+
+ dbg_log("LEB %d:%d, jhead %d, bud_bytes %lld", bud->lnum,
+ bud->start, bud->jhead, c->bud_bytes);
+ spin_unlock(&c->buds_lock);
+}
+
+/**
+ * ubifs_create_buds_lists - create journal head buds lists for remount rw.
+ * @c: UBIFS file-system description object
+ */
+void ubifs_create_buds_lists(struct ubifs_info *c)
+{
+ struct rb_node *p;
+
+ spin_lock(&c->buds_lock);
+ p = rb_first(&c->buds);
+ while (p) {
+ struct ubifs_bud *bud = rb_entry(p, struct ubifs_bud, rb);
+ struct ubifs_jhead *jhead = &c->jheads[bud->jhead];
+
+ list_add_tail(&bud->list, &jhead->buds_list);
+ p = rb_next(p);
+ }
+ spin_unlock(&c->buds_lock);
+}
+
+/**
+ * ubifs_add_bud_to_log - add a new bud to the log.
+ * @c: UBIFS file-system description object
+ * @jhead: journal head the bud belongs to
+ * @lnum: LEB number of the bud
+ * @offs: starting offset of the bud
+ *
+ * This function writes reference node for the new bud LEB @lnum it to the log,
+ * and adds it to the buds tress. It also makes sure that log size does not
+ * exceed the 'c->max_bud_bytes' limit. Returns zero in case of success,
+ * %-EAGAIN if commit is required, and a negative error codes in case of
+ * failure.
+ */
+int ubifs_add_bud_to_log(struct ubifs_info *c, int jhead, int lnum, int offs)
+{
+ int err;
+ struct ubifs_bud *bud;
+ struct ubifs_ref_node *ref;
+
+ bud = kmalloc(sizeof(struct ubifs_bud), GFP_NOFS);
+ if (!bud)
+ return -ENOMEM;
+ ref = kzalloc(c->ref_node_alsz, GFP_NOFS);
+ if (!ref) {
+ kfree(bud);
+ return -ENOMEM;
+ }
+
+ mutex_lock(&c->log_mutex);
+ /* Make sure we have enough space in the log */
+ if (empty_log_bytes(c) - c->ref_node_alsz < c->min_log_bytes) {
+ dbg_log("not enough log space - %lld, required %d",
+ empty_log_bytes(c), c->min_log_bytes);
+ ubifs_commit_required(c);
+ err = -EAGAIN;
+ goto out_unlock;
+ }
+
+ /*
+ * Make sure the the amount of space in buds will not exceed
+ * 'c->max_bud_bytes' limit, because we want to guarantee mount time
+ * limits.
+ *
+ * It is not necessary to hold @c->buds_lock when reading @c->bud_bytes
+ * because we are holding @c->log_mutex. All @c->bud_bytes take place
+ * when both @c->log_mutex and @c->bud_bytes are locked.
+ */
+ if (c->bud_bytes + c->leb_size - offs > c->max_bud_bytes) {
+ dbg_log("bud bytes %lld (%lld max), require commit",
+ c->bud_bytes, c->max_bud_bytes);
+ ubifs_commit_required(c);
+ err = -EAGAIN;
+ goto out_unlock;
+ }
+
+ /*
+ * If the journal is full enough - start background commit. Note, it is
+ * OK to read 'c->cmt_state' without spinlock because integer reads
+ * are atomic in the kernel.
+ */
+ if (c->bud_bytes >= c->bg_bud_bytes &&
+ c->cmt_state == COMMIT_RESTING) {
+ dbg_log("bud bytes %lld (%lld max), initiate BG commit",
+ c->bud_bytes, c->max_bud_bytes);
+ ubifs_request_bg_commit(c);
+ }
+
+ bud->lnum = lnum;
+ bud->start = offs;
+ bud->jhead = jhead;
+
+ ref->ch.node_type = UBIFS_REF_NODE;
+ ref->lnum = cpu_to_le32(bud->lnum);
+ ref->offs = cpu_to_le32(bud->start);
+ ref->jhead = cpu_to_le32(jhead);
+
+ if (c->lhead_offs > c->leb_size - c->ref_node_alsz) {
+ c->lhead_lnum = next_log_lnum(c, c->lhead_lnum);
+ c->lhead_offs = 0;
+ }
+
+ if (c->lhead_offs == 0) {
+ /* Must ensure next log LEB has been unmapped */
+ err = ubifs_leb_unmap(c, c->lhead_lnum);
+ if (err)
+ goto out_unlock;
+ }
+
+ if (bud->start == 0) {
+ /*
+ * Before writing the LEB reference which refers an empty LEB
+ * to the log, we have to make sure it is mapped, because
+ * otherwise we'd risk to refer an LEB with garbage in case of
+ * an unclean reboot, because the target LEB might have been
+ * unmapped, but not yet physically erased.
+ */
+ err = ubi_leb_map(c->ubi, bud->lnum, UBI_SHORTTERM);
+ if (err)
+ goto out_unlock;
+ }
+
+ dbg_log("write ref LEB %d:%d",
+ c->lhead_lnum, c->lhead_offs);
+ err = ubifs_write_node(c, ref, UBIFS_REF_NODE_SZ, c->lhead_lnum,
+ c->lhead_offs, UBI_SHORTTERM);
+ c->lhead_offs += c->ref_node_alsz;
+ if (err)
+ goto out_unlock;
+
+ ubifs_add_bud(c, bud);
+
+ mutex_unlock(&c->log_mutex);
+ kfree(ref);
+ return 0;
+
+out_unlock:
+ mutex_unlock(&c->log_mutex);
+ kfree(ref);
+ kfree(bud);
+ return err;
+}
+
+/**
+ * remove_buds - remove used buds.
+ * @c: UBIFS file-system description object
+ *
+ * This function removes use buds from the buds tree. It does not remove the
+ * buds which are pointed to by journal heads.
+ */
+static void remove_buds(struct ubifs_info *c)
+{
+ struct rb_node *p;
+
+ ubifs_assert(list_empty(&c->old_buds));
+ c->cmt_bud_bytes = 0;
+ spin_lock(&c->buds_lock);
+ p = rb_first(&c->buds);
+ while (p) {
+ struct rb_node *p1 = p;
+ struct ubifs_bud *bud;
+ struct ubifs_wbuf *wbuf;
+
+ p = rb_next(p);
+ bud = rb_entry(p1, struct ubifs_bud, rb);
+ wbuf = &c->jheads[bud->jhead].wbuf;
+
+ if (wbuf->lnum == bud->lnum) {
+ /*
+ * Do not remove buds which are pointed to by journal
+ * heads (non-closed buds).
+ */
+ c->cmt_bud_bytes += wbuf->offs - bud->start;
+ dbg_log("preserve %d:%d, jhead %d, bud bytes %d, "
+ "cmt_bud_bytes %lld", bud->lnum, bud->start,
+ bud->jhead, wbuf->offs - bud->start,
+ c->cmt_bud_bytes);
+ bud->start = wbuf->offs;
+ } else {
+ c->cmt_bud_bytes += c->leb_size - bud->start;
+ dbg_log("remove %d:%d, jhead %d, bud bytes %d, "
+ "cmt_bud_bytes %lld", bud->lnum, bud->start,
+ bud->jhead, c->leb_size - bud->start,
+ c->cmt_bud_bytes);
+ rb_erase(p1, &c->buds);
+ list_del(&bud->list);
+ /*
+ * If the commit does not finish, the recovery will need
+ * to replay the journal, in which case the old buds
+ * must be unchanged. Do not release them until post
+ * commit i.e. do not allow them to be garbage
+ * collected.
+ */
+ list_add(&bud->list, &c->old_buds);
+ }
+ }
+ spin_unlock(&c->buds_lock);
+}
+
+/**
+ * ubifs_log_start_commit - start commit.
+ * @c: UBIFS file-system description object
+ * @ltail_lnum: return new log tail LEB number
+ *
+ * The commit operation starts with writing "commit start" node to the log and
+ * reference nodes for all journal heads which will define new journal after
+ * the commit has been finished. The commit start and reference nodes are
+ * written in one go to the nearest empty log LEB (hence, when commit is
+ * finished UBIFS may safely unmap all the previous log LEBs). This function
+ * returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum)
+{
+ void *buf;
+ struct ubifs_cs_node *cs;
+ struct ubifs_ref_node *ref;
+ int err, i, max_len, len;
+
+ err = dbg_check_bud_bytes(c);
+ if (err)
+ return err;
+
+ max_len = UBIFS_CS_NODE_SZ + c->jhead_cnt * UBIFS_REF_NODE_SZ;
+ max_len = ALIGN(max_len, c->min_io_size);
+ buf = cs = kmalloc(max_len, GFP_NOFS);
+ if (!buf)
+ return -ENOMEM;
+
+ cs->ch.node_type = UBIFS_CS_NODE;
+ cs->cmt_no = cpu_to_le64(c->cmt_no + 1);
+ ubifs_prepare_node(c, cs, UBIFS_CS_NODE_SZ, 0);
+
+ /*
+ * Note, we do not lock 'c->log_mutex' because this is the commit start
+ * phase and we are exclusively using the log. And we do not lock
+ * write-buffer because nobody can write to the file-system at this
+ * phase.
+ */
+
+ len = UBIFS_CS_NODE_SZ;
+ for (i = 0; i < c->jhead_cnt; i++) {
+ int lnum = c->jheads[i].wbuf.lnum;
+ int offs = c->jheads[i].wbuf.offs;
+
+ if (lnum == -1 || offs == c->leb_size)
+ continue;
+
+ dbg_log("add ref to LEB %d:%d for jhead %d", lnum, offs, i);
+ ref = buf + len;
+ ref->ch.node_type = UBIFS_REF_NODE;
+ ref->lnum = cpu_to_le32(lnum);
+ ref->offs = cpu_to_le32(offs);
+ ref->jhead = cpu_to_le32(i);
+
+ ubifs_prepare_node(c, ref, UBIFS_REF_NODE_SZ, 0);
+ len += UBIFS_REF_NODE_SZ;
+ }
+
+ ubifs_pad(c, buf + len, ALIGN(len, c->min_io_size) - len);
+
+ /* Switch to the next log LEB */
+ if (c->lhead_offs) {
+ c->lhead_lnum = next_log_lnum(c, c->lhead_lnum);
+ c->lhead_offs = 0;
+ }
+
+ if (c->lhead_offs == 0) {
+ /* Must ensure next LEB has been unmapped */
+ err = ubifs_leb_unmap(c, c->lhead_lnum);
+ if (err)
+ goto out;
+ }
+
+ len = ALIGN(len, c->min_io_size);
+ dbg_log("writing commit start at LEB %d:0, len %d", c->lhead_lnum, len);
+ err = ubifs_leb_write(c, c->lhead_lnum, cs, 0, len, UBI_SHORTTERM);
+ if (err)
+ goto out;
+
+ *ltail_lnum = c->lhead_lnum;
+
+ c->lhead_offs += len;
+ if (c->lhead_offs == c->leb_size) {
+ c->lhead_lnum = next_log_lnum(c, c->lhead_lnum);
+ c->lhead_offs = 0;
+ }
+
+ remove_buds(c);
+
+ /*
+ * We have started the commit and now users may use the rest of the log
+ * for new writes.
+ */
+ c->min_log_bytes = 0;
+
+out:
+ kfree(buf);
+ return err;
+}
+
+/**
+ * ubifs_log_end_commit - end commit.
+ * @c: UBIFS file-system description object
+ * @ltail_lnum: new log tail LEB number
+ *
+ * This function is called on when the commit operation was finished. It
+ * moves log tail to new position and unmaps LEBs which contain obsolete data.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+int ubifs_log_end_commit(struct ubifs_info *c, int ltail_lnum)
+{
+ int err;
+
+ /*
+ * At this phase we have to lock 'c->log_mutex' because UBIFS allows FS
+ * writes during commit. Its only short "commit" start phase when
+ * writers are blocked.
+ */
+ mutex_lock(&c->log_mutex);
+
+ dbg_log("old tail was LEB %d:0, new tail is LEB %d:0",
+ c->ltail_lnum, ltail_lnum);
+
+ c->ltail_lnum = ltail_lnum;
+ /*
+ * The commit is finished and from now on it must be guaranteed that
+ * there is always enough space for the next commit.
+ */
+ c->min_log_bytes = c->leb_size;
+
+ spin_lock(&c->buds_lock);
+ c->bud_bytes -= c->cmt_bud_bytes;
+ spin_unlock(&c->buds_lock);
+
+ err = dbg_check_bud_bytes(c);
+
+ mutex_unlock(&c->log_mutex);
+ return err;
+}
+
+/**
+ * ubifs_log_post_commit - things to do after commit is completed.
+ * @c: UBIFS file-system description object
+ * @old_ltail_lnum: old log tail LEB number
+ *
+ * Release buds only after commit is completed, because they must be unchanged
+ * if recovery is needed.
+ *
+ * Unmap log LEBs only after commit is completed, because they may be needed for
+ * recovery.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_log_post_commit(struct ubifs_info *c, int old_ltail_lnum)
+{
+ int lnum, err = 0;
+
+ while (!list_empty(&c->old_buds)) {
+ struct ubifs_bud *bud;
+
+ bud = list_entry(c->old_buds.next, struct ubifs_bud, list);
+ err = ubifs_return_leb(c, bud->lnum);
+ if (err)
+ return err;
+ list_del(&bud->list);
+ kfree(bud);
+ }
+ mutex_lock(&c->log_mutex);
+ for (lnum = old_ltail_lnum; lnum != c->ltail_lnum;
+ lnum = next_log_lnum(c, lnum)) {
+ dbg_log("unmap log LEB %d", lnum);
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ goto out;
+ }
+out:
+ mutex_unlock(&c->log_mutex);
+ return err;
+}
+
+/**
+ * struct done_ref - references that have been done.
+ * @rb: rb-tree node
+ * @lnum: LEB number
+ */
+struct done_ref {
+ struct rb_node rb;
+ int lnum;
+};
+
+/**
+ * done_already - determine if a reference has been done already.
+ * @done_tree: rb-tree to store references that have been done
+ * @lnum: LEB number of reference
+ *
+ * This function returns %1 if the reference has been done, %0 if not, otherwise
+ * a negative error code is returned.
+ */
+static int done_already(struct rb_root *done_tree, int lnum)
+{
+ struct rb_node **p = &done_tree->rb_node, *parent = NULL;
+ struct done_ref *dr;
+
+ while (*p) {
+ parent = *p;
+ dr = rb_entry(parent, struct done_ref, rb);
+ if (lnum < dr->lnum)
+ p = &(*p)->rb_left;
+ else if (lnum > dr->lnum)
+ p = &(*p)->rb_right;
+ else
+ return 1;
+ }
+
+ dr = kzalloc(sizeof(struct done_ref), GFP_NOFS);
+ if (!dr)
+ return -ENOMEM;
+
+ dr->lnum = lnum;
+
+ rb_link_node(&dr->rb, parent, p);
+ rb_insert_color(&dr->rb, done_tree);
+
+ return 0;
+}
+
+/**
+ * destroy_done_tree - destroy the done tree.
+ * @done_tree: done tree to destroy
+ */
+static void destroy_done_tree(struct rb_root *done_tree)
+{
+ struct rb_node *this = done_tree->rb_node;
+ struct done_ref *dr;
+
+ while (this) {
+ if (this->rb_left) {
+ this = this->rb_left;
+ continue;
+ } else if (this->rb_right) {
+ this = this->rb_right;
+ continue;
+ }
+ dr = rb_entry(this, struct done_ref, rb);
+ this = rb_parent(this);
+ if (this) {
+ if (this->rb_left == &dr->rb)
+ this->rb_left = NULL;
+ else
+ this->rb_right = NULL;
+ }
+ kfree(dr);
+ }
+}
+
+/**
+ * add_node - add a node to the consolidated log.
+ * @c: UBIFS file-system description object
+ * @buf: buffer to which to add
+ * @lnum: LEB number to which to write is passed and returned here
+ * @offs: offset to where to write is passed and returned here
+ * @node: node to add
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int add_node(struct ubifs_info *c, void *buf, int *lnum, int *offs,
+ void *node)
+{
+ struct ubifs_ch *ch = node;
+ int len = le32_to_cpu(ch->len), remains = c->leb_size - *offs;
+
+ if (len > remains) {
+ int sz = ALIGN(*offs, c->min_io_size), err;
+
+ ubifs_pad(c, buf + *offs, sz - *offs);
+ err = ubi_leb_change(c->ubi, *lnum, buf, sz, UBI_SHORTTERM);
+ if (err)
+ return err;
+ *lnum = next_log_lnum(c, *lnum);
+ *offs = 0;
+ }
+ memcpy(buf + *offs, node, len);
+ *offs += ALIGN(len, 8);
+ return 0;
+}
+
+/**
+ * ubifs_consolidate_log - consolidate the log.
+ * @c: UBIFS file-system description object
+ *
+ * Repeated failed commits could cause the log to be full, but at least 1 LEB is
+ * needed for commit. This function rewrites the reference nodes in the log
+ * omitting duplicates, and failed CS nodes, and leaving no gaps.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_consolidate_log(struct ubifs_info *c)
+{
+ struct ubifs_scan_leb *sleb;
+ struct ubifs_scan_node *snod;
+ struct rb_root done_tree = RB_ROOT;
+ int lnum, err, first = 1, write_lnum, offs = 0;
+ void *buf;
+
+ dbg_rcvry("log tail LEB %d, log head LEB %d", c->ltail_lnum,
+ c->lhead_lnum);
+ buf = vmalloc(c->leb_size);
+ if (!buf)
+ return -ENOMEM;
+ lnum = c->ltail_lnum;
+ write_lnum = lnum;
+ while (1) {
+ sleb = ubifs_scan(c, lnum, 0, c->sbuf);
+ if (IS_ERR(sleb)) {
+ err = PTR_ERR(sleb);
+ goto out_free;
+ }
+ list_for_each_entry(snod, &sleb->nodes, list) {
+ switch (snod->type) {
+ case UBIFS_REF_NODE: {
+ struct ubifs_ref_node *ref = snod->node;
+ int ref_lnum = le32_to_cpu(ref->lnum);
+
+ err = done_already(&done_tree, ref_lnum);
+ if (err < 0)
+ goto out_scan;
+ if (err != 1) {
+ err = add_node(c, buf, &write_lnum,
+ &offs, snod->node);
+ if (err)
+ goto out_scan;
+ }
+ break;
+ }
+ case UBIFS_CS_NODE:
+ if (!first)
+ break;
+ err = add_node(c, buf, &write_lnum, &offs,
+ snod->node);
+ if (err)
+ goto out_scan;
+ first = 0;
+ break;
+ }
+ }
+ ubifs_scan_destroy(sleb);
+ if (lnum == c->lhead_lnum)
+ break;
+ lnum = next_log_lnum(c, lnum);
+ }
+ if (offs) {
+ int sz = ALIGN(offs, c->min_io_size);
+
+ ubifs_pad(c, buf + offs, sz - offs);
+ err = ubi_leb_change(c->ubi, write_lnum, buf, sz,
+ UBI_SHORTTERM);
+ if (err)
+ goto out_free;
+ offs = ALIGN(offs, c->min_io_size);
+ }
+ destroy_done_tree(&done_tree);
+ vfree(buf);
+ if (write_lnum == c->lhead_lnum) {
+ ubifs_err("log is too full");
+ return -EINVAL;
+ }
+ /* Unmap remaining LEBs */
+ lnum = write_lnum;
+ do {
+ lnum = next_log_lnum(c, lnum);
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ } while (lnum != c->lhead_lnum);
+ c->lhead_lnum = write_lnum;
+ c->lhead_offs = offs;
+ dbg_rcvry("new log head at %d:%d", c->lhead_lnum, c->lhead_offs);
+ return 0;
+
+out_scan:
+ ubifs_scan_destroy(sleb);
+out_free:
+ destroy_done_tree(&done_tree);
+ vfree(buf);
+ return err;
+}
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+
+/**
+ * dbg_check_bud_bytes - make sure bud bytes calculation are all right.
+ * @c: UBIFS file-system description object
+ *
+ * This function makes sure the amount of flash space used by closed buds
+ * ('c->bud_bytes' is correct). Returns zero in case of success and %-EINVAL in
+ * case of failure.
+ */
+static int dbg_check_bud_bytes(struct ubifs_info *c)
+{
+ int i, err = 0;
+ struct ubifs_bud *bud;
+ long long bud_bytes = 0;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_GEN))
+ return 0;
+
+ spin_lock(&c->buds_lock);
+ for (i = 0; i < c->jhead_cnt; i++)
+ list_for_each_entry(bud, &c->jheads[i].buds_list, list)
+ bud_bytes += c->leb_size - bud->start;
+
+ if (c->bud_bytes != bud_bytes) {
+ ubifs_err("bad bud_bytes %lld, calculated %lld",
+ c->bud_bytes, bud_bytes);
+ err = -EINVAL;
+ }
+ spin_unlock(&c->buds_lock);
+
+ return err;
+}
+
+#endif /* CONFIG_UBIFS_FS_DEBUG */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/lprops.c avr32-2.6/fs/ubifs/lprops.c
--- linux-2.6.25.6/fs/ubifs/lprops.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/lprops.c 2008-06-12 15:09:45.371816276 +0200
@@ -0,0 +1,1355 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file implements the functions that access LEB properties and their
+ * categories. LEBs are categorized based on the needs of UBIFS, and the
+ * categories are stored as either heaps or lists to provide a fast way of
+ * finding a LEB in a particular category. For example, UBIFS may need to find
+ * an empty LEB for the journal, or a very dirty LEB for garbage collection.
+ */
+
+#include "ubifs.h"
+
+/**
+ * get_heap_comp_val - get the LEB properties value for heap comparisons.
+ * @lprops: LEB properties
+ * @cat: LEB category
+ */
+static int get_heap_comp_val(struct ubifs_lprops *lprops, int cat)
+{
+ switch (cat) {
+ case LPROPS_FREE:
+ return lprops->free;
+ case LPROPS_DIRTY_IDX:
+ return lprops->free + lprops->dirty;
+ default:
+ return lprops->dirty;
+ }
+}
+
+/**
+ * move_up_lpt_heap - move a new heap entry up as far as possible.
+ * @c: UBIFS file-system description object
+ * @heap: LEB category heap
+ * @lprops: LEB properties to move
+ * @cat: LEB category
+ *
+ * New entries to a heap are added at the bottom and then moved up until the
+ * parent's value is greater. In the case of LPT's category heaps, the value
+ * is either the amount of free space or the amount of dirty space, depending
+ * on the category.
+ */
+static void move_up_lpt_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap,
+ struct ubifs_lprops *lprops, int cat)
+{
+ int val1, val2, hpos;
+
+ hpos = lprops->hpos;
+ if (!hpos)
+ return; /* Already top of the heap */
+ val1 = get_heap_comp_val(lprops, cat);
+ /* Compare to parent and, if greater, move up the heap */
+ do {
+ int ppos = (hpos - 1) / 2;
+
+ val2 = get_heap_comp_val(heap->arr[ppos], cat);
+ if (val2 >= val1)
+ return;
+ /* Greater than parent so move up */
+ heap->arr[ppos]->hpos = hpos;
+ heap->arr[hpos] = heap->arr[ppos];
+ heap->arr[ppos] = lprops;
+ lprops->hpos = ppos;
+ hpos = ppos;
+ } while (hpos);
+}
+
+/**
+ * adjust_lpt_heap - move a changed heap entry up or down the heap.
+ * @c: UBIFS file-system description object
+ * @heap: LEB category heap
+ * @lprops: LEB properties to move
+ * @hpos: heap position of @lprops
+ * @cat: LEB category
+ *
+ * Changed entries in a heap are moved up or down until the parent's value is
+ * greater. In the case of LPT's category heaps, the value is either the amount
+ * of free space or the amount of dirty space, depending on the category.
+ */
+static void adjust_lpt_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap,
+ struct ubifs_lprops *lprops, int hpos, int cat)
+{
+ int val1, val2, val3, cpos;
+
+ val1 = get_heap_comp_val(lprops, cat);
+ /* Compare to parent and, if greater than parent, move up the heap */
+ if (hpos) {
+ int ppos = (hpos - 1) / 2;
+
+ val2 = get_heap_comp_val(heap->arr[ppos], cat);
+ if (val1 > val2) {
+ /* Greater than parent so move up */
+ while (1) {
+ heap->arr[ppos]->hpos = hpos;
+ heap->arr[hpos] = heap->arr[ppos];
+ heap->arr[ppos] = lprops;
+ lprops->hpos = ppos;
+ hpos = ppos;
+ if (!hpos)
+ return;
+ ppos = (hpos - 1) / 2;
+ val2 = get_heap_comp_val(heap->arr[ppos], cat);
+ if (val1 <= val2)
+ return;
+ /* Still greater than parent so keep going */
+ }
+ }
+ }
+ /* Not greater than parent, so compare to children */
+ while (1) {
+ /* Compare to left child */
+ cpos = hpos * 2 + 1;
+ if (cpos >= heap->cnt)
+ return;
+ val2 = get_heap_comp_val(heap->arr[cpos], cat);
+ if (val1 < val2) {
+ /* Less than left child, so promote biggest child */
+ if (cpos + 1 < heap->cnt) {
+ val3 = get_heap_comp_val(heap->arr[cpos + 1],
+ cat);
+ if (val3 > val2)
+ cpos += 1; /* Right child is bigger */
+ }
+ heap->arr[cpos]->hpos = hpos;
+ heap->arr[hpos] = heap->arr[cpos];
+ heap->arr[cpos] = lprops;
+ lprops->hpos = cpos;
+ hpos = cpos;
+ continue;
+ }
+ /* Compare to right child */
+ cpos += 1;
+ if (cpos >= heap->cnt)
+ return;
+ val3 = get_heap_comp_val(heap->arr[cpos], cat);
+ if (val1 < val3) {
+ /* Less than right child, so promote right child */
+ heap->arr[cpos]->hpos = hpos;
+ heap->arr[hpos] = heap->arr[cpos];
+ heap->arr[cpos] = lprops;
+ lprops->hpos = cpos;
+ hpos = cpos;
+ continue;
+ }
+ return;
+ }
+}
+
+/**
+ * add_to_lpt_heap - add LEB properties to a LEB category heap.
+ * @c: UBIFS file-system description object
+ * @lprops: LEB properties to add
+ * @cat: LEB category
+ *
+ * This function returns %1 if @lprops is added to the heap for LEB category
+ * @cat, otherwise %0 is returned because the heap is full.
+ */
+static int add_to_lpt_heap(struct ubifs_info *c, struct ubifs_lprops *lprops,
+ int cat)
+{
+ struct ubifs_lpt_heap *heap = &c->lpt_heap[cat - 1];
+
+ if (heap->cnt >= heap->max_cnt) {
+ const int b = LPT_HEAP_SZ / 2 - 1;
+ int cpos, val1, val2;
+
+ /* Compare to some other LEB on the bottom of heap */
+ /* Pick a position kind of randomly */
+ cpos = (((size_t)lprops >> 4) & b) + b;
+ ubifs_assert(cpos >= b);
+ ubifs_assert(cpos < LPT_HEAP_SZ);
+ ubifs_assert(cpos < heap->cnt);
+
+ val1 = get_heap_comp_val(lprops, cat);
+ val2 = get_heap_comp_val(heap->arr[cpos], cat);
+ if (val1 > val2) {
+ struct ubifs_lprops *lp;
+
+ lp = heap->arr[cpos];
+ lp->flags &= ~LPROPS_CAT_MASK;
+ lp->flags |= LPROPS_UNCAT;
+ list_add(&lp->list, &c->uncat_list);
+ lprops->hpos = cpos;
+ heap->arr[cpos] = lprops;
+ move_up_lpt_heap(c, heap, lprops, cat);
+ dbg_check_heap(c, heap, cat, lprops->hpos);
+ return 1; /* Added to heap */
+ }
+ dbg_check_heap(c, heap, cat, -1);
+ return 0; /* Not added to heap */
+ } else {
+ lprops->hpos = heap->cnt++;
+ heap->arr[lprops->hpos] = lprops;
+ move_up_lpt_heap(c, heap, lprops, cat);
+ dbg_check_heap(c, heap, cat, lprops->hpos);
+ return 1; /* Added to heap */
+ }
+}
+
+/**
+ * remove_from_lpt_heap - remove LEB properties from a LEB category heap.
+ * @c: UBIFS file-system description object
+ * @lprops: LEB properties to remove
+ * @cat: LEB category
+ */
+static void remove_from_lpt_heap(struct ubifs_info *c,
+ struct ubifs_lprops *lprops, int cat)
+{
+ struct ubifs_lpt_heap *heap;
+ int hpos = lprops->hpos;
+
+ heap = &c->lpt_heap[cat - 1];
+ ubifs_assert(hpos >= 0 && hpos < heap->cnt);
+ ubifs_assert(heap->arr[hpos] == lprops);
+ heap->cnt -= 1;
+ if (hpos < heap->cnt) {
+ heap->arr[hpos] = heap->arr[heap->cnt];
+ heap->arr[hpos]->hpos = hpos;
+ adjust_lpt_heap(c, heap, heap->arr[hpos], hpos, cat);
+ }
+ dbg_check_heap(c, heap, cat, -1);
+}
+
+/**
+ * lpt_heap_replace - replace lprops in a category heap.
+ * @c: UBIFS file-system description object
+ * @old_lprops: LEB properties to replace
+ * @new_lprops: LEB properties with which to replace
+ * @cat: LEB category
+ *
+ * During commit it is sometimes necessary to copy a pnode (see dirty_cow_pnode)
+ * and the lprops that the pnode contains. When that happens, references in
+ * the category heaps to those lprops must be updated to point to the new
+ * lprops. This function does that.
+ */
+static void lpt_heap_replace(struct ubifs_info *c,
+ struct ubifs_lprops *old_lprops,
+ struct ubifs_lprops *new_lprops, int cat)
+{
+ struct ubifs_lpt_heap *heap;
+ int hpos = new_lprops->hpos;
+
+ heap = &c->lpt_heap[cat - 1];
+ heap->arr[hpos] = new_lprops;
+}
+
+/**
+ * ubifs_add_to_cat - add LEB properties to a category list or heap.
+ * @c: UBIFS file-system description object
+ * @lprops: LEB properties to add
+ * @cat: LEB category to which to add
+ *
+ * LEB properties are categorized to enable fast find operations.
+ */
+void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops,
+ int cat)
+{
+ switch (cat) {
+ case LPROPS_DIRTY:
+ case LPROPS_DIRTY_IDX:
+ case LPROPS_FREE:
+ if (add_to_lpt_heap(c, lprops, cat))
+ break;
+ /* No more room on heap so make it uncategorized */
+ cat = LPROPS_UNCAT;
+ /* Fall through */
+ case LPROPS_UNCAT:
+ list_add(&lprops->list, &c->uncat_list);
+ break;
+ case LPROPS_EMPTY:
+ list_add(&lprops->list, &c->empty_list);
+ break;
+ case LPROPS_FREEABLE:
+ list_add(&lprops->list, &c->freeable_list);
+ c->freeable_cnt += 1;
+ break;
+ case LPROPS_FRDI_IDX:
+ list_add(&lprops->list, &c->frdi_idx_list);
+ break;
+ default:
+ ubifs_assert(0);
+ }
+ lprops->flags &= ~LPROPS_CAT_MASK;
+ lprops->flags |= cat;
+}
+
+/**
+ * ubifs_remove_from_cat - remove LEB properties from a category list or heap.
+ * @c: UBIFS file-system description object
+ * @lprops: LEB properties to remove
+ * @cat: LEB category from which to remove
+ *
+ * LEB properties are categorized to enable fast find operations.
+ */
+static void ubifs_remove_from_cat(struct ubifs_info *c,
+ struct ubifs_lprops *lprops, int cat)
+{
+ switch (cat) {
+ case LPROPS_DIRTY:
+ case LPROPS_DIRTY_IDX:
+ case LPROPS_FREE:
+ remove_from_lpt_heap(c, lprops, cat);
+ break;
+ case LPROPS_FREEABLE:
+ c->freeable_cnt -= 1;
+ ubifs_assert(c->freeable_cnt >= 0);
+ /* Fall through */
+ case LPROPS_UNCAT:
+ case LPROPS_EMPTY:
+ case LPROPS_FRDI_IDX:
+ ubifs_assert(!list_empty(&lprops->list));
+ list_del(&lprops->list);
+ break;
+ default:
+ ubifs_assert(0);
+ }
+}
+
+/**
+ * ubifs_replace_cat - replace lprops in a category list or heap.
+ * @c: UBIFS file-system description object
+ * @old_lprops: LEB properties to replace
+ * @new_lprops: LEB properties with which to replace
+ *
+ * During commit it is sometimes necessary to copy a pnode (see dirty_cow_pnode)
+ * and the lprops that the pnode contains. When that happens, references in
+ * category lists and heaps must be replaced. This function does that.
+ */
+void ubifs_replace_cat(struct ubifs_info *c, struct ubifs_lprops *old_lprops,
+ struct ubifs_lprops *new_lprops)
+{
+ int cat;
+
+ cat = new_lprops->flags & LPROPS_CAT_MASK;
+ switch (cat) {
+ case LPROPS_DIRTY:
+ case LPROPS_DIRTY_IDX:
+ case LPROPS_FREE:
+ lpt_heap_replace(c, old_lprops, new_lprops, cat);
+ break;
+ case LPROPS_UNCAT:
+ case LPROPS_EMPTY:
+ case LPROPS_FREEABLE:
+ case LPROPS_FRDI_IDX:
+ list_replace(&old_lprops->list, &new_lprops->list);
+ break;
+ default:
+ ubifs_assert(0);
+ }
+}
+
+/**
+ * ubifs_ensure_cat - ensure LEB properties are categorized.
+ * @c: UBIFS file-system description object
+ * @lprops: LEB properties
+ *
+ * A LEB may have fallen off of the bottom of a heap, and ended up as
+ * uncategorized even though it has enough space for us now. If that is the case
+ * this function will put the LEB back onto a heap.
+ */
+void ubifs_ensure_cat(struct ubifs_info *c, struct ubifs_lprops *lprops)
+{
+ int cat = lprops->flags & LPROPS_CAT_MASK;
+
+ if (cat != LPROPS_UNCAT)
+ return;
+ cat = ubifs_categorize_lprops(c, lprops);
+ if (cat == LPROPS_UNCAT)
+ return;
+ ubifs_remove_from_cat(c, lprops, LPROPS_UNCAT);
+ ubifs_add_to_cat(c, lprops, cat);
+}
+
+/**
+ * ubifs_categorize_lprops - categorize LEB properties.
+ * @c: UBIFS file-system description object
+ * @lprops: LEB properties to categorize
+ *
+ * LEB properties are categorized to enable fast find operations. This function
+ * returns the LEB category to which the LEB properties belong. Note however
+ * that if the LEB category is stored as a heap and the heap is full, the
+ * LEB properties may have their category changed to %LPROPS_UNCAT.
+ */
+int ubifs_categorize_lprops(const struct ubifs_info *c,
+ const struct ubifs_lprops *lprops)
+{
+ if (lprops->flags & LPROPS_TAKEN)
+ return LPROPS_UNCAT;
+
+ if (lprops->free == c->leb_size) {
+ ubifs_assert(!(lprops->flags & LPROPS_INDEX));
+ return LPROPS_EMPTY;
+ }
+
+ if (lprops->free + lprops->dirty == c->leb_size) {
+ if (lprops->flags & LPROPS_INDEX)
+ return LPROPS_FRDI_IDX;
+ else
+ return LPROPS_FREEABLE;
+ }
+
+ if (lprops->flags & LPROPS_INDEX) {
+ if (lprops->dirty + lprops->free >= c->min_idx_node_sz)
+ return LPROPS_DIRTY_IDX;
+ } else {
+ if (lprops->dirty >= c->dead_wm &&
+ lprops->dirty > lprops->free)
+ return LPROPS_DIRTY;
+ if (lprops->free > 0)
+ return LPROPS_FREE;
+ }
+
+ return LPROPS_UNCAT;
+}
+
+/**
+ * change_category - change LEB properties category.
+ * @c: UBIFS file-system description object
+ * @lprops: LEB properties to recategorize
+ *
+ * LEB properties are categorized to enable fast find operations. When the LEB
+ * properties change they must be recategorized.
+ */
+static void change_category(struct ubifs_info *c, struct ubifs_lprops *lprops)
+{
+ int old_cat = lprops->flags & LPROPS_CAT_MASK;
+ int new_cat = ubifs_categorize_lprops(c, lprops);
+
+ if (old_cat == new_cat) {
+ struct ubifs_lpt_heap *heap = &c->lpt_heap[new_cat - 1];
+
+ /* lprops on a heap now must be moved up or down */
+ if (new_cat < 1 || new_cat > LPROPS_HEAP_CNT)
+ return; /* Not on a heap */
+ heap = &c->lpt_heap[new_cat - 1];
+ adjust_lpt_heap(c, heap, lprops, lprops->hpos, new_cat);
+ } else {
+ ubifs_remove_from_cat(c, lprops, old_cat);
+ ubifs_add_to_cat(c, lprops, new_cat);
+ }
+}
+
+/**
+ * ubifs_get_lprops - get reference to LEB properties.
+ * @c: the UBIFS file-system description object
+ *
+ * This function locks lprops. Lprops have to be unlocked by
+ * 'ubifs_release_lprops()'.
+ */
+void ubifs_get_lprops(struct ubifs_info *c)
+{
+ mutex_lock(&c->lp_mutex);
+}
+
+/**
+ * calc_dark - calculate LEB dark space size.
+ * @c: the UBIFS file-system description object
+ * @spc: amount of free and dirty space in the LEB
+ *
+ * This function calculates amount of dark space in an LEB which has @spc bytes
+ * of free and dirty space. Returns the calculations result.
+ *
+ * Dark space is the space which is not always usable - it depends on which
+ * nodes are written in which order. E.g., if an LEB has only 512 free bytes,
+ * it is dark space, because it cannot fit a large data node. So UBIFS cannot
+ * count on this LEB and treat these 512 bytes as usable because it is not true
+ * if, for example, only big chunks of uncompressible data will be written to
+ * the FS.
+ */
+static int calc_dark(struct ubifs_info *c, int spc)
+{
+ ubifs_assert(!(spc & 7));
+
+ if (spc < c->dark_wm)
+ return spc;
+
+ /*
+ * If we have slightly more space then the dark space watermark, we can
+ * anyway safely assume it we'll be able to write a node of the
+ * smallest size there.
+ */
+ if (spc - c->dark_wm < MIN_WRITE_SZ)
+ return spc - MIN_WRITE_SZ;
+
+ return c->dark_wm;
+}
+
+/**
+ * is_lprops_dirty - determine if LEB properties are dirty.
+ * @c: the UBIFS file-system description object
+ * @lprops: LEB properties to test
+ */
+static int is_lprops_dirty(struct ubifs_info *c, struct ubifs_lprops *lprops)
+{
+ struct ubifs_pnode *pnode;
+ int pos;
+
+ pos = (lprops->lnum - c->main_first) & (UBIFS_LPT_FANOUT - 1);
+ pnode = (struct ubifs_pnode *)container_of(lprops - pos,
+ struct ubifs_pnode,
+ lprops[0]);
+ return !test_bit(COW_ZNODE, &pnode->flags) &&
+ test_bit(DIRTY_CNODE, &pnode->flags);
+}
+
+/**
+ * ubifs_change_lp - change LEB properties.
+ * @c: the UBIFS file-system description object
+ * @lp: LEB properties to change
+ * @free: new free space amount
+ * @dirty: new dirty space amount
+ * @flags: new flags
+ * @idx_gc_cnt: change to the count of idx_gc list
+ *
+ * This function changes LEB properties. This function does not change a LEB
+ * property (@free, @dirty or @flag) if the value passed is %LPROPS_NC.
+ *
+ * This function returns a pointer to the updated LEB properties on success
+ * and a negative error code on failure. N.B. the LEB properties may have had to
+ * be copied (due to COW) and consequently the pointer returned may not be the
+ * same as the pointer passed.
+ */
+const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c,
+ const struct ubifs_lprops *lp,
+ int free, int dirty, int flags,
+ int idx_gc_cnt)
+{
+ /*
+ * This is the only function that is allowed to change lprops, so we
+ * discard the const qualifier.
+ */
+ struct ubifs_lprops *lprops = (struct ubifs_lprops *)lp;
+
+ dbg_lp("LEB %d, free %d, dirty %d, flags %d",
+ lprops->lnum, free, dirty, flags);
+
+ ubifs_assert(mutex_is_locked(&c->lp_mutex));
+ ubifs_assert(c->lst.empty_lebs >= 0 &&
+ c->lst.empty_lebs <= c->main_lebs);
+ ubifs_assert(c->freeable_cnt >= 0);
+ ubifs_assert(c->freeable_cnt <= c->main_lebs);
+ ubifs_assert(c->lst.taken_empty_lebs >= 0);
+ ubifs_assert(c->lst.taken_empty_lebs <= c->lst.empty_lebs);
+ ubifs_assert(!(c->lst.total_free & 7) && !(c->lst.total_dirty & 7));
+ ubifs_assert(!(c->lst.total_dead & 7) && !(c->lst.total_dark & 7));
+ ubifs_assert(!(c->lst.total_used & 7));
+ ubifs_assert(free == LPROPS_NC || free >= 0);
+ ubifs_assert(dirty == LPROPS_NC || dirty >= 0);
+
+ if (!is_lprops_dirty(c, lprops)) {
+ lprops = ubifs_lpt_lookup_dirty(c, lprops->lnum);
+ if (IS_ERR(lprops))
+ return lprops;
+ } else
+ ubifs_assert(lprops == ubifs_lpt_lookup_dirty(c, lprops->lnum));
+
+ ubifs_assert(!(lprops->free & 7) && !(lprops->dirty & 7));
+
+ spin_lock(&c->space_lock);
+
+ if ((lprops->flags & LPROPS_TAKEN) && lprops->free == c->leb_size)
+ c->lst.taken_empty_lebs -= 1;
+
+ if (!(lprops->flags & LPROPS_INDEX)) {
+ int old_spc;
+
+ old_spc = lprops->free + lprops->dirty;
+ if (old_spc < c->dead_wm)
+ c->lst.total_dead -= old_spc;
+ else
+ c->lst.total_dark -= calc_dark(c, old_spc);
+
+ c->lst.total_used -= c->leb_size - old_spc;
+ }
+
+ if (free != LPROPS_NC) {
+ free = ALIGN(free, 8);
+ c->lst.total_free += free - lprops->free;
+
+ /* Increase or decrease empty LEBs counter if needed */
+ if (free == c->leb_size) {
+ if (lprops->free != c->leb_size)
+ c->lst.empty_lebs += 1;
+ } else if (lprops->free == c->leb_size)
+ c->lst.empty_lebs -= 1;
+ lprops->free = free;
+ }
+
+ if (dirty != LPROPS_NC) {
+ dirty = ALIGN(dirty, 8);
+ c->lst.total_dirty += dirty - lprops->dirty;
+ lprops->dirty = dirty;
+ }
+
+ if (flags != LPROPS_NC) {
+ /* Take care about indexing LEBs counter if needed */
+ if ((lprops->flags & LPROPS_INDEX)) {
+ if (!(flags & LPROPS_INDEX))
+ c->lst.idx_lebs -= 1;
+ } else if (flags & LPROPS_INDEX)
+ c->lst.idx_lebs += 1;
+ lprops->flags = flags;
+ }
+
+ if (!(lprops->flags & LPROPS_INDEX)) {
+ int new_spc;
+
+ new_spc = lprops->free + lprops->dirty;
+ if (new_spc < c->dead_wm)
+ c->lst.total_dead += new_spc;
+ else
+ c->lst.total_dark += calc_dark(c, new_spc);
+
+ c->lst.total_used += c->leb_size - new_spc;
+ }
+
+ if ((lprops->flags & LPROPS_TAKEN) && lprops->free == c->leb_size)
+ c->lst.taken_empty_lebs += 1;
+
+ change_category(c, lprops);
+
+ c->idx_gc_cnt += idx_gc_cnt;
+
+ spin_unlock(&c->space_lock);
+
+ return lprops;
+}
+
+/**
+ * ubifs_release_lprops - release lprops lock.
+ * @c: the UBIFS file-system description object
+ *
+ * This function has to be called after each 'ubifs_get_lprops()' call to
+ * unlock lprops.
+ */
+void ubifs_release_lprops(struct ubifs_info *c)
+{
+ ubifs_assert(mutex_is_locked(&c->lp_mutex));
+ ubifs_assert(c->lst.empty_lebs >= 0 &&
+ c->lst.empty_lebs <= c->main_lebs);
+
+ mutex_unlock(&c->lp_mutex);
+}
+
+/**
+ * ubifs_get_lp_stats - get lprops statistics.
+ * @c: UBIFS file-system description object
+ * @st: return statistics
+ */
+void ubifs_get_lp_stats(struct ubifs_info *c, struct ubifs_lp_stats *st)
+{
+ spin_lock(&c->space_lock);
+ memcpy(st, &c->lst, sizeof(struct ubifs_lp_stats));
+ spin_unlock(&c->space_lock);
+}
+
+/**
+ * ubifs_change_one_lp - change LEB properties.
+ * @c: the UBIFS file-system description object
+ * @lnum: LEB to change properties for
+ * @free: amount of free space
+ * @dirty: amount of dirty space
+ * @flags_set: flags to set
+ * @flags_clean: flags to clean
+ * @idx_gc_cnt: change to the count of idx_gc list
+ *
+ * This function changes properties of LEB @lnum. It is a helper wrapper over
+ * 'ubifs_change_lp()' which hides lprops get/release. The arguments are the
+ * same as in case of 'ubifs_change_lp()'. Returns zero in case of success and
+ * a negative error code in case of failure.
+ */
+int ubifs_change_one_lp(struct ubifs_info *c, int lnum, int free, int dirty,
+ int flags_set, int flags_clean, int idx_gc_cnt)
+{
+ int err = 0, flags;
+ const struct ubifs_lprops *lp;
+
+ ubifs_get_lprops(c);
+
+ lp = ubifs_lpt_lookup_dirty(c, lnum);
+ if (IS_ERR(lp)) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+
+ flags = (lp->flags | flags_set) & ~flags_clean;
+ lp = ubifs_change_lp(c, lp, free, dirty, flags, idx_gc_cnt);
+ if (IS_ERR(lp))
+ err = PTR_ERR(lp);
+
+out:
+ ubifs_release_lprops(c);
+ return err;
+}
+
+/**
+ * ubifs_update_one_lp - update LEB properties.
+ * @c: the UBIFS file-system description object
+ * @lnum: LEB to change properties for
+ * @free: amount of free space
+ * @dirty: amount of dirty space to add
+ * @flags_set: flags to set
+ * @flags_clean: flags to clean
+ *
+ * This function is the same as 'ubifs_change_one_lp()' but @dirty is added to
+ * current dirty space, not substitutes it.
+ */
+int ubifs_update_one_lp(struct ubifs_info *c, int lnum, int free, int dirty,
+ int flags_set, int flags_clean)
+{
+ int err = 0, flags;
+ const struct ubifs_lprops *lp;
+
+ ubifs_get_lprops(c);
+
+ lp = ubifs_lpt_lookup_dirty(c, lnum);
+ if (IS_ERR(lp)) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+
+ flags = (lp->flags | flags_set) & ~flags_clean;
+ lp = ubifs_change_lp(c, lp, free, lp->dirty + dirty, flags, 0);
+ if (IS_ERR(lp))
+ err = PTR_ERR(lp);
+
+out:
+ ubifs_release_lprops(c);
+ return err;
+}
+
+/**
+ * ubifs_read_one_lp - read LEB properties.
+ * @c: the UBIFS file-system description object
+ * @lnum: LEB to read properties for
+ * @lp: where to store read properties
+ *
+ * This helper function reads properties of a LEB @lnum and stores them in @lp.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+int ubifs_read_one_lp(struct ubifs_info *c, int lnum, struct ubifs_lprops *lp)
+{
+ int err = 0;
+ const struct ubifs_lprops *lpp;
+
+ ubifs_get_lprops(c);
+
+ lpp = ubifs_lpt_lookup(c, lnum);
+ if (IS_ERR(lpp)) {
+ err = PTR_ERR(lpp);
+ goto out;
+ }
+
+ memcpy(lp, lpp, sizeof(struct ubifs_lprops));
+
+out:
+ ubifs_release_lprops(c);
+ return err;
+}
+
+/**
+ * ubifs_fast_find_free - try to find a LEB with free space quickly.
+ * @c: the UBIFS file-system description object
+ *
+ * This function returns LEB properties for a LEB with free space or %NULL if
+ * the function is unable to find a LEB quickly.
+ */
+const struct ubifs_lprops *ubifs_fast_find_free(struct ubifs_info *c)
+{
+ struct ubifs_lprops *lprops;
+ struct ubifs_lpt_heap *heap;
+
+ ubifs_assert(mutex_is_locked(&c->lp_mutex));
+
+ heap = &c->lpt_heap[LPROPS_FREE - 1];
+ if (heap->cnt == 0)
+ return NULL;
+
+ lprops = heap->arr[0];
+ ubifs_assert(!(lprops->flags & LPROPS_TAKEN));
+ ubifs_assert(!(lprops->flags & LPROPS_INDEX));
+ return lprops;
+}
+
+/**
+ * ubifs_fast_find_empty - try to find an empty LEB quickly.
+ * @c: the UBIFS file-system description object
+ *
+ * This function returns LEB properties for an empty LEB or %NULL if the
+ * function is unable to find an empty LEB quickly.
+ */
+const struct ubifs_lprops *ubifs_fast_find_empty(struct ubifs_info *c)
+{
+ struct ubifs_lprops *lprops;
+
+ ubifs_assert(mutex_is_locked(&c->lp_mutex));
+
+ if (list_empty(&c->empty_list))
+ return NULL;
+
+ lprops = list_entry(c->empty_list.next, struct ubifs_lprops, list);
+ ubifs_assert(!(lprops->flags & LPROPS_TAKEN));
+ ubifs_assert(!(lprops->flags & LPROPS_INDEX));
+ ubifs_assert(lprops->free == c->leb_size);
+ return lprops;
+}
+
+/**
+ * ubifs_fast_find_freeable - try to find a freeable LEB quickly.
+ * @c: the UBIFS file-system description object
+ *
+ * This function returns LEB properties for a freeable LEB or %NULL if the
+ * function is unable to find a freeable LEB quickly.
+ */
+const struct ubifs_lprops *ubifs_fast_find_freeable(struct ubifs_info *c)
+{
+ struct ubifs_lprops *lprops;
+
+ ubifs_assert(mutex_is_locked(&c->lp_mutex));
+
+ if (list_empty(&c->freeable_list))
+ return NULL;
+
+ lprops = list_entry(c->freeable_list.next, struct ubifs_lprops, list);
+ ubifs_assert(!(lprops->flags & LPROPS_TAKEN));
+ ubifs_assert(!(lprops->flags & LPROPS_INDEX));
+ ubifs_assert(lprops->free + lprops->dirty == c->leb_size);
+ ubifs_assert(c->freeable_cnt > 0);
+ return lprops;
+}
+
+/**
+ * ubifs_fast_find_frdi_idx - try to find a freeable index LEB quickly.
+ * @c: the UBIFS file-system description object
+ *
+ * This function returns LEB properties for a freeable index LEB or %NULL if the
+ * function is unable to find a freeable index LEB quickly.
+ */
+const struct ubifs_lprops *ubifs_fast_find_frdi_idx(struct ubifs_info *c)
+{
+ struct ubifs_lprops *lprops;
+
+ ubifs_assert(mutex_is_locked(&c->lp_mutex));
+
+ if (list_empty(&c->frdi_idx_list))
+ return NULL;
+
+ lprops = list_entry(c->frdi_idx_list.next, struct ubifs_lprops, list);
+ ubifs_assert(!(lprops->flags & LPROPS_TAKEN));
+ ubifs_assert((lprops->flags & LPROPS_INDEX));
+ ubifs_assert(lprops->free + lprops->dirty == c->leb_size);
+ return lprops;
+}
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+
+/**
+ * dbg_check_cats - check category heaps and lists.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int dbg_check_cats(struct ubifs_info *c)
+{
+ struct ubifs_lprops *lprops;
+ struct list_head *pos;
+ int i, cat;
+
+ if (!(ubifs_chk_flags & (UBIFS_CHK_GEN | UBIFS_CHK_LPROPS)))
+ return 0;
+
+ list_for_each_entry(lprops, &c->empty_list, list) {
+ if (lprops->free != c->leb_size) {
+ ubifs_err("non-empty LEB %d on empty list "
+ "(free %d dirty %d flags %d)", lprops->lnum,
+ lprops->free, lprops->dirty, lprops->flags);
+ return -EINVAL;
+ }
+ if (lprops->flags & LPROPS_TAKEN) {
+ ubifs_err("taken LEB %d on empty list "
+ "(free %d dirty %d flags %d)", lprops->lnum,
+ lprops->free, lprops->dirty, lprops->flags);
+ return -EINVAL;
+ }
+ }
+
+ i = 0;
+ list_for_each_entry(lprops, &c->freeable_list, list) {
+ if (lprops->free + lprops->dirty != c->leb_size) {
+ ubifs_err("non-freeable LEB %d on freeable list "
+ "(free %d dirty %d flags %d)", lprops->lnum,
+ lprops->free, lprops->dirty, lprops->flags);
+ return -EINVAL;
+ }
+ if (lprops->flags & LPROPS_TAKEN) {
+ ubifs_err("taken LEB %d on freeable list "
+ "(free %d dirty %d flags %d)", lprops->lnum,
+ lprops->free, lprops->dirty, lprops->flags);
+ return -EINVAL;
+ }
+ i += 1;
+ }
+ if (i != c->freeable_cnt) {
+ ubifs_err("freeable list count %d expected %d", i,
+ c->freeable_cnt);
+ return -EINVAL;
+ }
+
+ i = 0;
+ list_for_each(pos, &c->idx_gc)
+ i += 1;
+ if (i != c->idx_gc_cnt) {
+ ubifs_err("idx_gc list count %d expected %d", i,
+ c->idx_gc_cnt);
+ return -EINVAL;
+ }
+
+ list_for_each_entry(lprops, &c->frdi_idx_list, list) {
+ if (lprops->free + lprops->dirty != c->leb_size) {
+ ubifs_err("non-freeable LEB %d on frdi_idx list "
+ "(free %d dirty %d flags %d)", lprops->lnum,
+ lprops->free, lprops->dirty, lprops->flags);
+ return -EINVAL;
+ }
+ if (lprops->flags & LPROPS_TAKEN) {
+ ubifs_err("taken LEB %d on frdi_idx list "
+ "(free %d dirty %d flags %d)", lprops->lnum,
+ lprops->free, lprops->dirty, lprops->flags);
+ return -EINVAL;
+ }
+ if (!(lprops->flags & LPROPS_INDEX)) {
+ ubifs_err("non-index LEB %d on frdi_idx list "
+ "(free %d dirty %d flags %d)", lprops->lnum,
+ lprops->free, lprops->dirty, lprops->flags);
+ return -EINVAL;
+ }
+ }
+
+ for (cat = 1; cat <= LPROPS_HEAP_CNT; cat++) {
+ struct ubifs_lpt_heap *heap = &c->lpt_heap[cat - 1];
+
+ for (i = 0; i < heap->cnt; i++) {
+ lprops = heap->arr[i];
+ if (!lprops) {
+ ubifs_err("null ptr in LPT heap cat %d", cat);
+ return -EINVAL;
+ }
+ if (lprops->hpos != i) {
+ ubifs_err("bad ptr in LPT heap cat %d", cat);
+ return -EINVAL;
+ }
+ if (lprops->flags & LPROPS_TAKEN) {
+ ubifs_err("taken LEB in LPT heap cat %d", cat);
+ return -EINVAL;
+ }
+ }
+ }
+
+ return 0;
+}
+
+void dbg_check_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap, int cat,
+ int add_pos)
+{
+ int i = 0, j, err = 0;
+
+ if (!(ubifs_chk_flags & (UBIFS_CHK_GEN | UBIFS_CHK_LPROPS)))
+ return;
+
+ for (i = 0; i < heap->cnt; i++) {
+ struct ubifs_lprops *lprops = heap->arr[i];
+ struct ubifs_lprops *lp;
+
+ if (i != add_pos)
+ if ((lprops->flags & LPROPS_CAT_MASK) != cat) {
+ err = 1;
+ goto out;
+ }
+ if (lprops->hpos != i) {
+ err = 2;
+ goto out;
+ }
+ lp = ubifs_lpt_lookup(c, lprops->lnum);
+ if (IS_ERR(lp)) {
+ err = 3;
+ goto out;
+ }
+ if (lprops != lp) {
+ dbg_msg("lprops %zx lp %zx lprops->lnum %d lp->lnum %d",
+ (size_t)lprops, (size_t)lp, lprops->lnum,
+ lp->lnum);
+ err = 4;
+ goto out;
+ }
+ for (j = 0; j < i; j++) {
+ lp = heap->arr[j];
+ if (lp == lprops) {
+ err = 5;
+ goto out;
+ }
+ if (lp->lnum == lprops->lnum) {
+ err = 6;
+ goto out;
+ }
+ }
+ }
+out:
+ if (err) {
+ dbg_msg("failed cat %d hpos %d err %d", cat, i, err);
+ dbg_dump_stack();
+ dbg_dump_heap(c, heap, cat);
+ }
+}
+
+/**
+ * struct scan_check_data - data provided to scan callback function.
+ * @lst: LEB properties statistics
+ * @err: error code
+ */
+struct scan_check_data {
+ struct ubifs_lp_stats lst;
+ int err;
+};
+
+/**
+ * scan_check_cb - scan callback.
+ * @c: the UBIFS file-system description object
+ * @lp: LEB properties to scan
+ * @in_tree: whether the LEB properties are in main memory
+ * @data: information passed to and from the caller of the scan
+ *
+ * This function returns a code that indicates whether the scan should continue
+ * (%LPT_SCAN_CONTINUE), whether the LEB properties should be added to the tree
+ * in main memory (%LPT_SCAN_ADD), or whether the scan should stop
+ * (%LPT_SCAN_STOP).
+ */
+static int scan_check_cb(struct ubifs_info *c,
+ const struct ubifs_lprops *lp, int in_tree,
+ struct scan_check_data *data)
+{
+ struct ubifs_scan_leb *sleb;
+ struct ubifs_scan_node *snod;
+ struct ubifs_lp_stats *lst = &data->lst;
+ int cat, lnum = lp->lnum, is_idx = 0, used = 0, free, dirty;
+
+ cat = lp->flags & LPROPS_CAT_MASK;
+ if (cat != LPROPS_UNCAT) {
+ cat = ubifs_categorize_lprops(c, lp);
+ if (cat != (lp->flags & LPROPS_CAT_MASK)) {
+ ubifs_err("bad LEB category %d expected %d",
+ (lp->flags & LPROPS_CAT_MASK), cat);
+ goto out;
+ }
+ }
+
+ /* Check lp is on its category list (if it has one) */
+ if (in_tree) {
+ struct list_head *list = NULL;
+
+ switch (cat) {
+ case LPROPS_EMPTY:
+ list = &c->empty_list;
+ break;
+ case LPROPS_FREEABLE:
+ list = &c->freeable_list;
+ break;
+ case LPROPS_FRDI_IDX:
+ list = &c->frdi_idx_list;
+ break;
+ case LPROPS_UNCAT:
+ list = &c->uncat_list;
+ break;
+ }
+ if (list) {
+ struct ubifs_lprops *lprops;
+ int found = 0;
+
+ list_for_each_entry(lprops, list, list) {
+ if (lprops == lp) {
+ found = 1;
+ break;
+ }
+ }
+ if (!found) {
+ ubifs_err("bad LPT list (category %d)", cat);
+ goto out;
+ }
+ }
+ }
+
+ /* Check lp is on its category heap (if it has one) */
+ if (in_tree && cat > 0 && cat <= LPROPS_HEAP_CNT) {
+ struct ubifs_lpt_heap *heap = &c->lpt_heap[cat - 1];
+
+ if ((lp->hpos != -1 && heap->arr[lp->hpos]->lnum != lnum) ||
+ lp != heap->arr[lp->hpos]) {
+ ubifs_err("bad LPT heap (category %d)", cat);
+ goto out;
+ }
+ }
+
+ sleb = ubifs_scan(c, lnum, 0, c->dbg_buf);
+ if (IS_ERR(sleb)) {
+ /*
+ * After an unclean unmount, empty and freeable LEBs
+ * may contain garbage.
+ */
+ if (lp->free == c->leb_size) {
+ ubifs_err("scan errors were in empty LEB "
+ "- continuing checking");
+ lst->empty_lebs += 1;
+ lst->total_free += c->leb_size;
+ lst->total_dark += calc_dark(c, c->leb_size);
+ return LPT_SCAN_CONTINUE;
+ }
+
+ if (lp->free + lp->dirty == c->leb_size &&
+ !(lp->flags & LPROPS_INDEX)) {
+ ubifs_err("scan errors were in freeable LEB "
+ "- continuing checking");
+ lst->total_free += lp->free;
+ lst->total_dirty += lp->dirty;
+ lst->total_dark += calc_dark(c, c->leb_size);
+ return LPT_SCAN_CONTINUE;
+ }
+ data->err = PTR_ERR(sleb);
+ return LPT_SCAN_STOP;
+ }
+
+ is_idx = -1;
+ list_for_each_entry(snod, &sleb->nodes, list) {
+ int found, level = 0;
+
+ cond_resched();
+
+ if (is_idx == -1)
+ is_idx = (snod->type == UBIFS_IDX_NODE) ? 1 : 0;
+
+ if (is_idx && snod->type != UBIFS_IDX_NODE) {
+ ubifs_err("indexing node in data LEB %d:%d",
+ lnum, snod->offs);
+ goto out_destroy;
+ }
+
+ if (snod->type == UBIFS_IDX_NODE) {
+ struct ubifs_idx_node *idx = snod->node;
+
+ key_read(c, ubifs_idx_key(c, idx), &snod->key);
+ level = le16_to_cpu(idx->level);
+ }
+
+ found = ubifs_tnc_has_node(c, &snod->key, level, lnum,
+ snod->offs, is_idx);
+ if (found) {
+ if (found < 0)
+ goto out_destroy;
+ used += ALIGN(snod->len, 8);
+ }
+ }
+
+ free = c->leb_size - sleb->endpt;
+ dirty = sleb->endpt - used;
+
+ if (free > c->leb_size || free < 0 || dirty > c->leb_size ||
+ dirty < 0) {
+ ubifs_err("bad calculated accounting for LEB %d: "
+ "free %d, dirty %d", lnum, free, dirty);
+ goto out_destroy;
+ }
+
+ if (lp->free + lp->dirty == c->leb_size &&
+ free + dirty == c->leb_size)
+ if ((is_idx && !(lp->flags & LPROPS_INDEX)) ||
+ (!is_idx && free == c->leb_size)) {
+ /*
+ * Empty or freeable LEBs could contain index
+ * nodes from an uncompleted commit due to an
+ * unclean unmount. Or they could be empty for
+ * the same reason.
+ */
+ free = lp->free;
+ dirty = lp->dirty;
+ is_idx = 0;
+ }
+
+ if (is_idx && lp->free + lp->dirty == free + dirty &&
+ lnum != c->ihead_lnum) {
+ /*
+ * After an unclean unmount, an index LEB could have a different
+ * amount of free space than the value recorded by lprops. That
+ * is because the in-the-gaps method may use free space or
+ * create free space (as a side-effect of using ubi_leb_change
+ * and not writing the whole LEB). The incorrect free space
+ * value is not a problem because the index is only ever
+ * allocated empty LEBs, so there will never be an attempt to
+ * write to the free space at the end of an index LEB - except
+ * by the in-the-gaps method for which it is not a problem.
+ */
+ free = lp->free;
+ dirty = lp->dirty;
+ }
+
+ if (lp->free != free || lp->dirty != dirty)
+ goto out_print;
+
+ if (is_idx && !(lp->flags & LPROPS_INDEX)) {
+ if (free == c->leb_size)
+ /* Free but not unmapped LEB, it's fine */
+ is_idx = 0;
+ else {
+ ubifs_err("indexing node without indexing "
+ "flag");
+ goto out_print;
+ }
+ }
+
+ if (!is_idx && (lp->flags & LPROPS_INDEX)) {
+ ubifs_err("data node with indexing flag");
+ goto out_print;
+ }
+
+ if (free == c->leb_size)
+ lst->empty_lebs += 1;
+
+ if (is_idx)
+ lst->idx_lebs += 1;
+
+ if (!(lp->flags & LPROPS_INDEX))
+ lst->total_used += c->leb_size - free - dirty;
+ lst->total_free += free;
+ lst->total_dirty += dirty;
+
+ if (!(lp->flags & LPROPS_INDEX)) {
+ int spc = free + dirty;
+
+ if (spc < c->dead_wm)
+ lst->total_dead += spc;
+ else
+ lst->total_dark += calc_dark(c, spc);
+ }
+
+ ubifs_scan_destroy(sleb);
+
+ return LPT_SCAN_CONTINUE;
+
+out_print:
+ ubifs_err("bad accounting of LEB %d: free %d, dirty %d flags %#x, "
+ "should be free %d, dirty %d",
+ lnum, lp->free, lp->dirty, lp->flags, free, dirty);
+ dbg_dump_leb(c, lnum);
+out_destroy:
+ ubifs_scan_destroy(sleb);
+out:
+ data->err = -EINVAL;
+ return LPT_SCAN_STOP;
+}
+
+/**
+ * dbg_check_lprops - check all LEB properties.
+ * @c: UBIFS file-system description object
+ *
+ * This function checks all LEB properties and makes sure they are all correct.
+ * It returns zero if everything is fine, %-EINVAL if there is an inconsistency
+ * and other negative error codes in case of other errors. This function is
+ * called while the file system is locked (because of commit start), so no
+ * additional locking is required. Note that locking the LPT mutex would cause
+ * a circular lock dependency with the TNC mutex.
+ */
+int dbg_check_lprops(struct ubifs_info *c)
+{
+ int i, err;
+ struct scan_check_data data;
+ struct ubifs_lp_stats *lst = &data.lst;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_LPROPS))
+ return 0;
+
+ /*
+ * As we are going to scan the media, the write buffers have to be
+ * synchronized.
+ */
+ for (i = 0; i < c->jhead_cnt; i++) {
+ err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
+ if (err)
+ return err;
+ }
+
+ memset(lst, 0, sizeof(struct ubifs_lp_stats));
+
+ data.err = 0;
+ err = ubifs_lpt_scan_nolock(c, c->main_first, c->leb_cnt - 1,
+ (ubifs_lpt_scan_callback)scan_check_cb,
+ &data);
+ if (err && err != -ENOSPC)
+ goto out;
+ if (data.err) {
+ err = data.err;
+ goto out;
+ }
+
+ if (lst->empty_lebs != c->lst.empty_lebs ||
+ lst->idx_lebs != c->lst.idx_lebs ||
+ lst->total_free != c->lst.total_free ||
+ lst->total_dirty != c->lst.total_dirty ||
+ lst->total_used != c->lst.total_used) {
+ ubifs_err("bad overall accounting");
+ ubifs_err("calculated: empty_lebs %d, idx_lebs %d, "
+ "total_free %lld, total_dirty %lld, total_used %lld",
+ lst->empty_lebs, lst->idx_lebs, lst->total_free,
+ lst->total_dirty, lst->total_used);
+ ubifs_err("read from lprops: empty_lebs %d, idx_lebs %d, "
+ "total_free %lld, total_dirty %lld, total_used %lld",
+ c->lst.empty_lebs, c->lst.idx_lebs, c->lst.total_free,
+ c->lst.total_dirty, c->lst.total_used);
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (lst->total_dead != c->lst.total_dead ||
+ lst->total_dark != c->lst.total_dark) {
+ ubifs_err("bad dead/dark space accounting");
+ ubifs_err("calculated: total_dead %lld, total_dark %lld",
+ lst->total_dead, lst->total_dark);
+ ubifs_err("read from lprops: total_dead %lld, total_dark %lld",
+ c->lst.total_dead, c->lst.total_dark);
+ err = -EINVAL;
+ goto out;
+ }
+
+ err = dbg_check_cats(c);
+out:
+ return err;
+}
+
+#endif /* CONFIG_UBIFS_FS_DEBUG */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/lpt.c avr32-2.6/fs/ubifs/lpt.c
--- linux-2.6.25.6/fs/ubifs/lpt.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/lpt.c 2008-06-12 15:09:45.475816115 +0200
@@ -0,0 +1,2241 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file implements the LEB properties tree (LPT) area. The LPT area
+ * contains the LEB properties tree, a table of LPT area eraseblocks (ltab), and
+ * (for the "big" model) a table of saved LEB numbers (lsave). The LPT area sits
+ * between the log and the orphan area.
+ *
+ * The LPT area is like a miniature self-contained file system. It is required
+ * that it never runs out of space, is fast to access and update, and scales
+ * logarithmically. The LEB properties tree is implemented as a wandering tree
+ * much like the TNC, and the LPT area has its own garbage collection.
+ *
+ * The LPT has two slightly different forms called the "small model" and the
+ * "big model". The small model is used when the entire LEB properties table
+ * can be written into a single eraseblock. In that case, garbage collection
+ * consists of just writing the whole table, which therefore makes all other
+ * eraseblocks reusable. In the case of the big model, dirty eraseblocks are
+ * selected for garbage collection, which consists are marking the nodes in
+ * that LEB as dirty, and then only the dirty nodes are written out. Also, in
+ * the case of the big model, a table of LEB numbers is saved so that the entire
+ * LPT does not to be scanned looking for empty eraseblocks when UBIFS is first
+ * mounted.
+ */
+
+#include <linux/crc16.h>
+#include "ubifs.h"
+
+/**
+ * do_calc_lpt_geom - calculate sizes for the LPT area.
+ * @c: the UBIFS file-system description object
+ *
+ * Calculate the sizes of LPT bit fields, nodes, and tree, based on the
+ * properties of the flash and whether LPT is "big" (c->big_lpt).
+ */
+static void do_calc_lpt_geom(struct ubifs_info *c)
+{
+ int i, n, bits, per_leb_wastage, max_pnode_cnt;
+ long long sz, tot_wastage;
+
+ n = c->main_lebs + c->max_leb_cnt - c->leb_cnt;
+ max_pnode_cnt = DIV_ROUND_UP(n, UBIFS_LPT_FANOUT);
+
+ c->lpt_hght = 1;
+ n = UBIFS_LPT_FANOUT;
+ while (n < max_pnode_cnt) {
+ c->lpt_hght += 1;
+ n <<= UBIFS_LPT_FANOUT_SHIFT;
+ }
+
+ c->pnode_cnt = DIV_ROUND_UP(c->main_lebs, UBIFS_LPT_FANOUT);
+
+ n = DIV_ROUND_UP(c->pnode_cnt, UBIFS_LPT_FANOUT);
+ c->nnode_cnt = n;
+ for (i = 1; i < c->lpt_hght; i++) {
+ n = DIV_ROUND_UP(n, UBIFS_LPT_FANOUT);
+ c->nnode_cnt += n;
+ }
+
+ c->space_bits = fls(c->leb_size) - 3;
+ c->lpt_lnum_bits = fls(c->lpt_lebs);
+ c->lpt_offs_bits = fls(c->leb_size - 1);
+ c->lpt_spc_bits = fls(c->leb_size);
+
+ n = DIV_ROUND_UP(c->max_leb_cnt, UBIFS_LPT_FANOUT);
+ c->pcnt_bits = fls(n - 1);
+
+ c->lnum_bits = fls(c->max_leb_cnt - 1);
+
+ bits = UBIFS_LPT_CRC_BITS + UBIFS_LPT_TYPE_BITS +
+ (c->big_lpt ? c->pcnt_bits : 0) +
+ (c->space_bits * 2 + 1) * UBIFS_LPT_FANOUT;
+ c->pnode_sz = (bits + 7) / 8;
+
+ bits = UBIFS_LPT_CRC_BITS + UBIFS_LPT_TYPE_BITS +
+ (c->big_lpt ? c->pcnt_bits : 0) +
+ (c->lpt_lnum_bits + c->lpt_offs_bits) * UBIFS_LPT_FANOUT;
+ c->nnode_sz = (bits + 7) / 8;
+
+ bits = UBIFS_LPT_CRC_BITS + UBIFS_LPT_TYPE_BITS +
+ c->lpt_lebs * c->lpt_spc_bits * 2;
+ c->ltab_sz = (bits + 7) / 8;
+
+ bits = UBIFS_LPT_CRC_BITS + UBIFS_LPT_TYPE_BITS +
+ c->lnum_bits * c->lsave_cnt;
+ c->lsave_sz = (bits + 7) / 8;
+
+ /* Calculate the minimum LPT size */
+ c->lpt_sz = (long long)c->pnode_cnt * c->pnode_sz;
+ c->lpt_sz += (long long)c->nnode_cnt * c->nnode_sz;
+ c->lpt_sz += c->ltab_sz;
+ c->lpt_sz += c->lsave_sz;
+
+ /* Add wastage */
+ sz = c->lpt_sz;
+ per_leb_wastage = max_t(int, c->pnode_sz, c->nnode_sz);
+ sz += per_leb_wastage;
+ tot_wastage = per_leb_wastage;
+ while (sz > c->leb_size) {
+ sz += per_leb_wastage;
+ sz -= c->leb_size;
+ tot_wastage += per_leb_wastage;
+ }
+ tot_wastage += ALIGN(sz, c->min_io_size) - sz;
+ c->lpt_sz += tot_wastage;
+}
+
+/**
+ * ubifs_calc_lpt_geom - calculate and check sizes for the LPT area.
+ * @c: the UBIFS file-system description object
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_calc_lpt_geom(struct ubifs_info *c)
+{
+ int lebs_needed;
+ uint64_t sz;
+
+ do_calc_lpt_geom(c);
+
+ /* Verify that lpt_lebs is big enough */
+ sz = c->lpt_sz * 2; /* Must have at least 2 times the size */
+ sz += c->leb_size - 1;
+ do_div(sz, c->leb_size);
+ lebs_needed = sz;
+ if (lebs_needed > c->lpt_lebs) {
+ ubifs_err("too few LPT LEBs");
+ return -EINVAL;
+ }
+
+ /* Verify that ltab fits in a single LEB (since ltab is a single node */
+ if (c->ltab_sz > c->leb_size) {
+ ubifs_err("LPT ltab too big");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * calc_dflt_lpt_geom - calculate default LPT geometry.
+ * @c: the UBIFS file-system description object
+ * @main_lebs: number of main area LEBs is passed and returned here
+ * @big_lpt: whether the LPT area is "big" is returned here
+ *
+ * The size of the LPT area depends on parameters that themselves are dependent
+ * on the size of the LPT area. This function, successively recalculates the LPT
+ * area geometry until the parameters and resultant geometry are consistent.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int calc_dflt_lpt_geom(struct ubifs_info *c, int *main_lebs,
+ int *big_lpt)
+{
+ int i, lebs_needed;
+ uint64_t sz;
+
+ /* Start by assuming the minimum number of LPT LEBs */
+ c->lpt_lebs = UBIFS_MIN_LPT_LEBS;
+ c->main_lebs = *main_lebs - c->lpt_lebs;
+ if (c->main_lebs <= 0)
+ return -EINVAL;
+
+ /* And assume we will use the small LPT model */
+ c->big_lpt = 0;
+
+ /*
+ * Calculate the geometry based on assumptions above and then see if it
+ * makes sense
+ */
+ do_calc_lpt_geom(c);
+
+ /* Small LPT model must have lpt_sz < leb_size */
+ if (c->lpt_sz > c->leb_size) {
+ /* Nope, so try again using big LPT model */
+ c->big_lpt = 1;
+ do_calc_lpt_geom(c);
+ }
+
+ /* Now check there are enough LPT LEBs */
+ for (i = 0; i < 64 ; i++) {
+ sz = c->lpt_sz * 4; /* Allow 4 times the size */
+ sz += c->leb_size - 1;
+ do_div(sz, c->leb_size);
+ lebs_needed = sz;
+ if (lebs_needed > c->lpt_lebs) {
+ /* Not enough LPT LEBs so try again with more */
+ c->lpt_lebs = lebs_needed;
+ c->main_lebs = *main_lebs - c->lpt_lebs;
+ if (c->main_lebs <= 0)
+ return -EINVAL;
+ do_calc_lpt_geom(c);
+ continue;
+ }
+ if (c->ltab_sz > c->leb_size) {
+ ubifs_err("LPT ltab too big");
+ return -EINVAL;
+ }
+ *main_lebs = c->main_lebs;
+ *big_lpt = c->big_lpt;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+/**
+ * pack_bits - pack bit fields end-to-end.
+ * @addr: address at which to pack (passed and next address returned)
+ * @pos: bit position at which to pack (passed and next position returned)
+ * @val: value to pack
+ * @nrbits: number of bits of value to pack (1-32)
+ */
+static void pack_bits(uint8_t **addr, int *pos, uint32_t val, int nrbits)
+{
+ uint8_t *p = *addr;
+ int b = *pos;
+
+ ubifs_assert(nrbits > 0);
+ ubifs_assert(nrbits <= 32);
+ ubifs_assert(*pos >= 0);
+ ubifs_assert(*pos < 8);
+ ubifs_assert((val >> nrbits) == 0 || nrbits == 32);
+ if (b) {
+ *p |= ((uint8_t)val) << b;
+ nrbits += b;
+ if (nrbits > 8) {
+ *++p = (uint8_t)(val >>= (8 - b));
+ if (nrbits > 16) {
+ *++p = (uint8_t)(val >>= 8);
+ if (nrbits > 24) {
+ *++p = (uint8_t)(val >>= 8);
+ if (nrbits > 32)
+ *++p = (uint8_t)(val >>= 8);
+ }
+ }
+ }
+ } else {
+ *p = (uint8_t)val;
+ if (nrbits > 8) {
+ *++p = (uint8_t)(val >>= 8);
+ if (nrbits > 16) {
+ *++p = (uint8_t)(val >>= 8);
+ if (nrbits > 24)
+ *++p = (uint8_t)(val >>= 8);
+ }
+ }
+ }
+ b = nrbits & 7;
+ if (b == 0)
+ p++;
+ *addr = p;
+ *pos = b;
+}
+
+/**
+ * ubifs_unpack_bits - unpack bit fields.
+ * @addr: address at which to unpack (passed and next address returned)
+ * @pos: bit position at which to unpack (passed and next position returned)
+ * @nrbits: number of bits of value to unpack (1-32)
+ *
+ * This functions returns the value unpacked.
+ */
+uint32_t ubifs_unpack_bits(uint8_t **addr, int *pos, int nrbits)
+{
+ const int k = 32 - nrbits;
+ uint8_t *p = *addr;
+ int b = *pos;
+ uint32_t val;
+
+ ubifs_assert(nrbits > 0);
+ ubifs_assert(nrbits <= 32);
+ ubifs_assert(*pos >= 0);
+ ubifs_assert(*pos < 8);
+ if (b) {
+ val = p[1] | ((uint32_t)p[2] << 8) | ((uint32_t)p[3] << 16) |
+ ((uint32_t)p[4] << 24);
+ val <<= (8 - b);
+ val |= *p >> b;
+ nrbits += b;
+ } else
+ val = p[0] | ((uint32_t)p[1] << 8) | ((uint32_t)p[2] << 16) |
+ ((uint32_t)p[3] << 24);
+ val <<= k;
+ val >>= k;
+ b = nrbits & 7;
+ p += nrbits / 8;
+ *addr = p;
+ *pos = b;
+ ubifs_assert((val >> nrbits) == 0 || nrbits - b == 32);
+ return val;
+}
+
+/**
+ * ubifs_pack_pnode - pack all the bit fields of a pnode.
+ * @c: UBIFS file-system description object
+ * @buf: buffer into which to pack
+ * @pnode: pnode to pack
+ */
+void ubifs_pack_pnode(struct ubifs_info *c, void *buf,
+ struct ubifs_pnode *pnode)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0;
+ uint16_t crc;
+
+ pack_bits(&addr, &pos, UBIFS_LPT_PNODE, UBIFS_LPT_TYPE_BITS);
+ if (c->big_lpt)
+ pack_bits(&addr, &pos, pnode->num, c->pcnt_bits);
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ pack_bits(&addr, &pos, pnode->lprops[i].free >> 3,
+ c->space_bits);
+ pack_bits(&addr, &pos, pnode->lprops[i].dirty >> 3,
+ c->space_bits);
+ if (pnode->lprops[i].flags & LPROPS_INDEX)
+ pack_bits(&addr, &pos, 1, 1);
+ else
+ pack_bits(&addr, &pos, 0, 1);
+ }
+ crc = crc16(-1, buf + UBIFS_LPT_CRC_BYTES,
+ c->pnode_sz - UBIFS_LPT_CRC_BYTES);
+ addr = buf;
+ pos = 0;
+ pack_bits(&addr, &pos, crc, UBIFS_LPT_CRC_BITS);
+}
+
+/**
+ * ubifs_pack_nnode - pack all the bit fields of a nnode.
+ * @c: UBIFS file-system description object
+ * @buf: buffer into which to pack
+ * @nnode: nnode to pack
+ */
+void ubifs_pack_nnode(struct ubifs_info *c, void *buf,
+ struct ubifs_nnode *nnode)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0;
+ uint16_t crc;
+
+ pack_bits(&addr, &pos, UBIFS_LPT_NNODE, UBIFS_LPT_TYPE_BITS);
+ if (c->big_lpt)
+ pack_bits(&addr, &pos, nnode->num, c->pcnt_bits);
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ int lnum = nnode->nbranch[i].lnum;
+
+ if (lnum == 0)
+ lnum = c->lpt_last + 1;
+ pack_bits(&addr, &pos, lnum - c->lpt_first, c->lpt_lnum_bits);
+ pack_bits(&addr, &pos, nnode->nbranch[i].offs,
+ c->lpt_offs_bits);
+ }
+ crc = crc16(-1, buf + UBIFS_LPT_CRC_BYTES,
+ c->nnode_sz - UBIFS_LPT_CRC_BYTES);
+ addr = buf;
+ pos = 0;
+ pack_bits(&addr, &pos, crc, UBIFS_LPT_CRC_BITS);
+}
+
+/**
+ * ubifs_pack_ltab - pack the LPT's own lprops table.
+ * @c: UBIFS file-system description object
+ * @buf: buffer into which to pack
+ * @ltab: LPT's own lprops table to pack
+ */
+void ubifs_pack_ltab(struct ubifs_info *c, void *buf,
+ struct ubifs_lpt_lprops *ltab)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0;
+ uint16_t crc;
+
+ pack_bits(&addr, &pos, UBIFS_LPT_LTAB, UBIFS_LPT_TYPE_BITS);
+ for (i = 0; i < c->lpt_lebs; i++) {
+ pack_bits(&addr, &pos, ltab[i].free, c->lpt_spc_bits);
+ pack_bits(&addr, &pos, ltab[i].dirty, c->lpt_spc_bits);
+ }
+ crc = crc16(-1, buf + UBIFS_LPT_CRC_BYTES,
+ c->ltab_sz - UBIFS_LPT_CRC_BYTES);
+ addr = buf;
+ pos = 0;
+ pack_bits(&addr, &pos, crc, UBIFS_LPT_CRC_BITS);
+}
+
+/**
+ * ubifs_pack_lsave - pack the LPT's save table.
+ * @c: UBIFS file-system description object
+ * @buf: buffer into which to pack
+ * @lsave: LPT's save table to pack
+ */
+void ubifs_pack_lsave(struct ubifs_info *c, void *buf, int *lsave)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0;
+ uint16_t crc;
+
+ pack_bits(&addr, &pos, UBIFS_LPT_LSAVE, UBIFS_LPT_TYPE_BITS);
+ for (i = 0; i < c->lsave_cnt; i++)
+ pack_bits(&addr, &pos, lsave[i], c->lnum_bits);
+ crc = crc16(-1, buf + UBIFS_LPT_CRC_BYTES,
+ c->lsave_sz - UBIFS_LPT_CRC_BYTES);
+ addr = buf;
+ pos = 0;
+ pack_bits(&addr, &pos, crc, UBIFS_LPT_CRC_BITS);
+}
+
+/**
+ * ubifs_add_lpt_dirt - add dirty space to LPT LEB properties.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number to which to add dirty space
+ * @dirty: amount of dirty space to add
+ */
+void ubifs_add_lpt_dirt(struct ubifs_info *c, int lnum, int dirty)
+{
+ if (!dirty || !lnum)
+ return;
+ dbg_lp("LEB %d add %d to %d",
+ lnum, dirty, c->ltab[lnum - c->lpt_first].dirty);
+ ubifs_assert(lnum >= c->lpt_first && lnum <= c->lpt_last);
+ c->ltab[lnum - c->lpt_first].dirty += dirty;
+}
+
+/**
+ * set_ltab - set LPT LEB properties.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number
+ * @free: amount of free space
+ * @dirty: amount of dirty space
+ */
+static void set_ltab(struct ubifs_info *c, int lnum, int free, int dirty)
+{
+ dbg_lp("LEB %d free %d dirty %d to %d %d",
+ lnum, c->ltab[lnum - c->lpt_first].free,
+ c->ltab[lnum - c->lpt_first].dirty, free, dirty);
+ ubifs_assert(lnum >= c->lpt_first && lnum <= c->lpt_last);
+ c->ltab[lnum - c->lpt_first].free = free;
+ c->ltab[lnum - c->lpt_first].dirty = dirty;
+}
+
+/**
+ * ubifs_add_nnode_dirt - add dirty space to LPT LEB properties.
+ * @c: UBIFS file-system description object
+ * @nnode: nnode for which to add dirt
+ */
+void ubifs_add_nnode_dirt(struct ubifs_info *c, struct ubifs_nnode *nnode)
+{
+ struct ubifs_nnode *np = nnode->parent;
+
+ if (np)
+ ubifs_add_lpt_dirt(c, np->nbranch[nnode->iip].lnum,
+ c->nnode_sz);
+ else {
+ ubifs_add_lpt_dirt(c, c->lpt_lnum, c->nnode_sz);
+ if (!(c->lpt_drty_flgs & LTAB_DIRTY)) {
+ c->lpt_drty_flgs |= LTAB_DIRTY;
+ ubifs_add_lpt_dirt(c, c->ltab_lnum, c->ltab_sz);
+ }
+ }
+}
+
+/**
+ * add_pnode_dirt - add dirty space to LPT LEB properties.
+ * @c: UBIFS file-system description object
+ * @pnode: pnode for which to add dirt
+ */
+static void add_pnode_dirt(struct ubifs_info *c, struct ubifs_pnode *pnode)
+{
+ ubifs_add_lpt_dirt(c, pnode->parent->nbranch[pnode->iip].lnum,
+ c->pnode_sz);
+}
+
+/**
+ * calc_nnode_num - calculate nnode number.
+ * @row: the row in the tree (root is zero)
+ * @col: the column in the row (leftmost is zero)
+ *
+ * The nnode number is a number that uniquely identifies a nnode and can be used
+ * easily to traverse the tree from the root to that nnode.
+ *
+ * This function calculates and returns the nnode number for the nnode at @row
+ * and @col.
+ */
+static int calc_nnode_num(int row, int col)
+{
+ int num, bits;
+
+ num = 1;
+ while (row--) {
+ bits = (col & (UBIFS_LPT_FANOUT - 1));
+ col >>= UBIFS_LPT_FANOUT_SHIFT;
+ num <<= UBIFS_LPT_FANOUT_SHIFT;
+ num |= bits;
+ }
+ return num;
+}
+
+/**
+ * calc_nnode_num_from_parent - calculate nnode number.
+ * @c: UBIFS file-system description object
+ * @parent: parent nnode
+ * @iip: index in parent
+ *
+ * The nnode number is a number that uniquely identifies a nnode and can be used
+ * easily to traverse the tree from the root to that nnode.
+ *
+ * This function calculates and returns the nnode number based on the parent's
+ * nnode number and the index in parent.
+ */
+static int calc_nnode_num_from_parent(struct ubifs_info *c,
+ struct ubifs_nnode *parent, int iip)
+{
+ int num, shft;
+
+ if (!parent)
+ return 1;
+ shft = (c->lpt_hght - parent->level) * UBIFS_LPT_FANOUT_SHIFT;
+ num = parent->num ^ (1 << shft);
+ num |= (UBIFS_LPT_FANOUT + iip) << shft;
+ return num;
+}
+
+/**
+ * calc_pnode_num_from_parent - calculate pnode number.
+ * @c: UBIFS file-system description object
+ * @parent: parent nnode
+ * @iip: index in parent
+ *
+ * The pnode number is a number that uniquely identifies a pnode and can be used
+ * easily to traverse the tree from the root to that pnode.
+ *
+ * This function calculates and returns the pnode number based on the parent's
+ * nnode number and the index in parent.
+ */
+static int calc_pnode_num_from_parent(struct ubifs_info *c,
+ struct ubifs_nnode *parent, int iip)
+{
+ int i, n = c->lpt_hght - 1, pnum = parent->num, num = 0;
+
+ for (i = 0; i < n; i++) {
+ num <<= UBIFS_LPT_FANOUT_SHIFT;
+ num |= pnum & (UBIFS_LPT_FANOUT - 1);
+ pnum >>= UBIFS_LPT_FANOUT_SHIFT;
+ }
+ num <<= UBIFS_LPT_FANOUT_SHIFT;
+ num |= iip;
+ return num;
+}
+
+/**
+ * ubifs_create_dflt_lpt - create default LPT.
+ * @c: UBIFS file-system description object
+ * @main_lebs: number of main area LEBs is passed and returned here
+ * @lpt_first: LEB number of first LPT LEB
+ * @lpt_lebs: number of LEBs for LPT is passed and returned here
+ * @big_lpt: use big LPT model is passed and returned here
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_create_dflt_lpt(struct ubifs_info *c, int *main_lebs, int lpt_first,
+ int *lpt_lebs, int *big_lpt)
+{
+ int lnum, err = 0, node_sz, iopos, i, j, cnt, len, alen, row;
+ int blnum, boffs, bsz, bcnt;
+ struct ubifs_pnode *pnode = NULL;
+ struct ubifs_nnode *nnode = NULL;
+ void *buf = NULL, *p;
+ struct ubifs_lpt_lprops *ltab = NULL;
+ int *lsave = NULL;
+
+ err = calc_dflt_lpt_geom(c, main_lebs, big_lpt);
+ if (err)
+ return err;
+ *lpt_lebs = c->lpt_lebs;
+
+ /* Needed by 'ubifs_pack_nnode()' and 'set_ltab()' */
+ c->lpt_first = lpt_first;
+ /* Needed by 'set_ltab()' */
+ c->lpt_last = lpt_first + c->lpt_lebs - 1;
+ /* Needed by 'ubifs_pack_lsave()' */
+ c->main_first = c->leb_cnt - *main_lebs;
+
+ lsave = kmalloc(sizeof(int) * c->lsave_cnt, GFP_KERNEL);
+ pnode = kzalloc(sizeof(struct ubifs_pnode), GFP_KERNEL);
+ nnode = kzalloc(sizeof(struct ubifs_nnode), GFP_KERNEL);
+ buf = vmalloc(c->leb_size);
+ ltab = vmalloc(sizeof(struct ubifs_lpt_lprops) * c->lpt_lebs);
+ if (!pnode || !nnode || !buf || !ltab || !lsave) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ ubifs_assert(!c->ltab);
+ c->ltab = ltab; /* Needed by set_ltab */
+
+ /* Initialize LPT's own lprops */
+ for (i = 0; i < c->lpt_lebs; i++) {
+ ltab[i].free = c->leb_size;
+ ltab[i].dirty = 0;
+ ltab[i].tgc = 0;
+ ltab[i].cmt = 0;
+ }
+
+ lnum = lpt_first;
+ p = buf;
+ /* Number of leaf nodes (pnodes) */
+ cnt = c->pnode_cnt;
+
+ /*
+ * The first pnode contains the LEB properties for the LEBs that contain
+ * the root inode node and the root index node of the index tree.
+ */
+ node_sz = ALIGN(ubifs_idx_node_sz(c, 1), 8);
+ iopos = ALIGN(node_sz, c->min_io_size);
+ pnode->lprops[0].free = c->leb_size - iopos;
+ pnode->lprops[0].dirty = iopos - node_sz;
+ pnode->lprops[0].flags = LPROPS_INDEX;
+
+ node_sz = UBIFS_INO_NODE_SZ;
+ iopos = ALIGN(node_sz, c->min_io_size);
+ pnode->lprops[1].free = c->leb_size - iopos;
+ pnode->lprops[1].dirty = iopos - node_sz;
+
+ for (i = 2; i < UBIFS_LPT_FANOUT; i++)
+ pnode->lprops[i].free = c->leb_size;
+
+ /* Add first pnode */
+ ubifs_pack_pnode(c, p, pnode);
+ p += c->pnode_sz;
+ len = c->pnode_sz;
+ pnode->num += 1;
+
+ /* Reset pnode values for remaining pnodes */
+ pnode->lprops[0].free = c->leb_size;
+ pnode->lprops[0].dirty = 0;
+ pnode->lprops[0].flags = 0;
+
+ pnode->lprops[1].free = c->leb_size;
+ pnode->lprops[1].dirty = 0;
+
+ /*
+ * To calculate the internal node branches, we keep information about
+ * the level below.
+ */
+ blnum = lnum; /* LEB number of level below */
+ boffs = 0; /* Offset of level below */
+ bcnt = cnt; /* Number of nodes in level below */
+ bsz = c->pnode_sz; /* Size of nodes in level below */
+
+ /* Add all remaining pnodes */
+ for (i = 1; i < cnt; i++) {
+ if (len + c->pnode_sz > c->leb_size) {
+ alen = ALIGN(len, c->min_io_size);
+ set_ltab(c, lnum, c->leb_size - alen, alen - len);
+ memset(p, 0xff, alen - len);
+ err = ubi_leb_change(c->ubi, lnum++, buf, alen,
+ UBI_SHORTTERM);
+ if (err)
+ goto out;
+ p = buf;
+ len = 0;
+ }
+ ubifs_pack_pnode(c, p, pnode);
+ p += c->pnode_sz;
+ len += c->pnode_sz;
+ /*
+ * pnodes are simply numbered left to right starting at zero,
+ * which means the pnode number can be used easily to traverse
+ * down the tree to the corresponding pnode.
+ */
+ pnode->num += 1;
+ }
+
+ row = 0;
+ for (i = UBIFS_LPT_FANOUT; cnt > i; i <<= UBIFS_LPT_FANOUT_SHIFT)
+ row += 1;
+ /* Add all nnodes, one level at a time */
+ while (1) {
+ /* Number of internal nodes (nnodes) at next level */
+ cnt = DIV_ROUND_UP(cnt, UBIFS_LPT_FANOUT);
+ for (i = 0; i < cnt; i++) {
+ if (len + c->nnode_sz > c->leb_size) {
+ alen = ALIGN(len, c->min_io_size);
+ set_ltab(c, lnum, c->leb_size - alen,
+ alen - len);
+ memset(p, 0xff, alen - len);
+ err = ubi_leb_change(c->ubi, lnum++, buf, alen,
+ UBI_SHORTTERM);
+ if (err)
+ goto out;
+ p = buf;
+ len = 0;
+ }
+ /* Only 1 nnode at this level, so it is the root */
+ if (cnt == 1) {
+ c->lpt_lnum = lnum;
+ c->lpt_offs = len;
+ }
+ /* Set branches to the level below */
+ for (j = 0; j < UBIFS_LPT_FANOUT; j++) {
+ if (bcnt) {
+ if (boffs + bsz > c->leb_size) {
+ blnum += 1;
+ boffs = 0;
+ }
+ nnode->nbranch[j].lnum = blnum;
+ nnode->nbranch[j].offs = boffs;
+ boffs += bsz;
+ bcnt--;
+ } else {
+ nnode->nbranch[j].lnum = 0;
+ nnode->nbranch[j].offs = 0;
+ }
+ }
+ nnode->num = calc_nnode_num(row, i);
+ ubifs_pack_nnode(c, p, nnode);
+ p += c->nnode_sz;
+ len += c->nnode_sz;
+ }
+ /* Only 1 nnode at this level, so it is the root */
+ if (cnt == 1)
+ break;
+ /* Update the information about the level below */
+ bcnt = cnt;
+ bsz = c->nnode_sz;
+ row -= 1;
+ }
+
+ if (*big_lpt) {
+ /* Need to add LPT's save table */
+ if (len + c->lsave_sz > c->leb_size) {
+ alen = ALIGN(len, c->min_io_size);
+ set_ltab(c, lnum, c->leb_size - alen, alen - len);
+ memset(p, 0xff, alen - len);
+ err = ubi_leb_change(c->ubi, lnum++, buf, alen,
+ UBI_SHORTTERM);
+ if (err)
+ goto out;
+ p = buf;
+ len = 0;
+ }
+
+ c->lsave_lnum = lnum;
+ c->lsave_offs = len;
+
+ for (i = 0; i < c->lsave_cnt && i < *main_lebs; i++)
+ lsave[i] = c->main_first + i;
+ for (; i < c->lsave_cnt; i++)
+ lsave[i] = c->main_first;
+
+ ubifs_pack_lsave(c, p, lsave);
+ p += c->lsave_sz;
+ len += c->lsave_sz;
+ }
+
+ /* Need to add LPT's own LEB properties table */
+ if (len + c->ltab_sz > c->leb_size) {
+ alen = ALIGN(len, c->min_io_size);
+ set_ltab(c, lnum, c->leb_size - alen, alen - len);
+ memset(p, 0xff, alen - len);
+ err = ubi_leb_change(c->ubi, lnum++, buf, alen, UBI_SHORTTERM);
+ if (err)
+ goto out;
+ p = buf;
+ len = 0;
+ }
+
+ c->ltab_lnum = lnum;
+ c->ltab_offs = len;
+
+ /* Update ltab before packing it */
+ len += c->ltab_sz;
+ alen = ALIGN(len, c->min_io_size);
+ set_ltab(c, lnum, c->leb_size - alen, alen - len);
+
+ ubifs_pack_ltab(c, p, ltab);
+ p += c->ltab_sz;
+
+ /* Write remaining buffer */
+ memset(p, 0xff, alen - len);
+ err = ubi_leb_change(c->ubi, lnum, buf, alen, UBI_SHORTTERM);
+ if (err)
+ goto out;
+
+ c->nhead_lnum = lnum;
+ c->nhead_offs = ALIGN(len, c->min_io_size);
+
+ dbg_lp("space_bits %d", c->space_bits);
+ dbg_lp("lpt_lnum_bits %d", c->lpt_lnum_bits);
+ dbg_lp("lpt_offs_bits %d", c->lpt_offs_bits);
+ dbg_lp("lpt_spc_bits %d", c->lpt_spc_bits);
+ dbg_lp("pcnt_bits %d", c->pcnt_bits);
+ dbg_lp("lnum_bits %d", c->lnum_bits);
+ dbg_lp("pnode_sz %d", c->pnode_sz);
+ dbg_lp("nnode_sz %d", c->nnode_sz);
+ dbg_lp("ltab_sz %d", c->ltab_sz);
+ dbg_lp("lsave_sz %d", c->lsave_sz);
+ dbg_lp("lsave_cnt %d", c->lsave_cnt);
+ dbg_lp("lpt_hght %d", c->lpt_hght);
+ dbg_lp("big_lpt %d", c->big_lpt);
+ dbg_lp("LPT root is at %d:%d", c->lpt_lnum, c->lpt_offs);
+ dbg_lp("LPT head is at %d:%d", c->nhead_lnum, c->nhead_offs);
+ dbg_lp("LPT ltab is at %d:%d", c->ltab_lnum, c->ltab_offs);
+ if (c->big_lpt)
+ dbg_lp("LPT lsave is at %d:%d", c->lsave_lnum, c->lsave_offs);
+out:
+ c->ltab = NULL;
+ kfree(lsave);
+ vfree(ltab);
+ vfree(buf);
+ kfree(nnode);
+ kfree(pnode);
+ return err;
+}
+
+/**
+ * update_cats - add LEB properties of a pnode to LEB category lists and heaps.
+ * @c: UBIFS file-system description object
+ * @pnode: pnode
+ *
+ * When a pnode is loaded into memory, the LEB properties it contains are added,
+ * by this function, to the LEB category lists and heaps.
+ */
+static void update_cats(struct ubifs_info *c, struct ubifs_pnode *pnode)
+{
+ int i;
+
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ int cat = pnode->lprops[i].flags & LPROPS_CAT_MASK;
+ int lnum = pnode->lprops[i].lnum;
+
+ if (!lnum)
+ return;
+ ubifs_add_to_cat(c, &pnode->lprops[i], cat);
+ }
+}
+
+/**
+ * replace_cats - add LEB properties of a pnode to LEB category lists and heaps.
+ * @c: UBIFS file-system description object
+ * @old_pnode: pnode copied
+ * @new_pnode: pnode copy
+ *
+ * During commit it is sometimes necessary to copy a pnode
+ * (see dirty_cow_pnode). When that happens, references in
+ * category lists and heaps must be replaced. This function does that.
+ */
+static void replace_cats(struct ubifs_info *c, struct ubifs_pnode *old_pnode,
+ struct ubifs_pnode *new_pnode)
+{
+ int i;
+
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ if (!new_pnode->lprops[i].lnum)
+ return;
+ ubifs_replace_cat(c, &old_pnode->lprops[i],
+ &new_pnode->lprops[i]);
+ }
+}
+
+/**
+ * check_lpt_crc - check LPT node crc is correct.
+ * @c: UBIFS file-system description object
+ * @buf: buffer containing node
+ * @len: length of node
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int check_lpt_crc(void *buf, int len)
+{
+ int pos = 0;
+ uint8_t *addr = buf;
+ uint16_t crc, calc_crc;
+
+ crc = ubifs_unpack_bits(&addr, &pos, UBIFS_LPT_CRC_BITS);
+ calc_crc = crc16(-1, buf + UBIFS_LPT_CRC_BYTES,
+ len - UBIFS_LPT_CRC_BYTES);
+ if (crc != calc_crc) {
+ ubifs_err("invalid crc in LPT node: crc %hx calc %hx", crc,
+ calc_crc);
+ dbg_dump_stack();
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/**
+ * check_lpt_type - check LPT node type is correct.
+ * @c: UBIFS file-system description object
+ * @addr: address of type bit field is passed and returned updated here
+ * @pos: position of type bit field is passed and returned updated here
+ * @type: expected type
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int check_lpt_type(uint8_t **addr, int *pos, int type)
+{
+ int node_type;
+
+ node_type = ubifs_unpack_bits(addr, pos, UBIFS_LPT_TYPE_BITS);
+ if (node_type != type) {
+ ubifs_err("invalid type (%d) in LPT node type %d", node_type,
+ type);
+ dbg_dump_stack();
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/**
+ * unpack_pnode - unpack a pnode.
+ * @c: UBIFS file-system description object
+ * @buf: buffer containing packed pnode to unpack
+ * @pnode: pnode structure to fill
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int unpack_pnode(struct ubifs_info *c, void *buf,
+ struct ubifs_pnode *pnode)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0, err;
+
+ err = check_lpt_type(&addr, &pos, UBIFS_LPT_PNODE);
+ if (err)
+ return err;
+ if (c->big_lpt)
+ pnode->num = ubifs_unpack_bits(&addr, &pos, c->pcnt_bits);
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ struct ubifs_lprops * const lprops = &pnode->lprops[i];
+
+ lprops->free = ubifs_unpack_bits(&addr, &pos, c->space_bits);
+ lprops->free <<= 3;
+ lprops->dirty = ubifs_unpack_bits(&addr, &pos, c->space_bits);
+ lprops->dirty <<= 3;
+
+ if (ubifs_unpack_bits(&addr, &pos, 1))
+ lprops->flags = LPROPS_INDEX;
+ else
+ lprops->flags = 0;
+ lprops->flags |= ubifs_categorize_lprops(c, lprops);
+ }
+ err = check_lpt_crc(buf, c->pnode_sz);
+ return err;
+}
+
+/**
+ * unpack_nnode - unpack a nnode.
+ * @c: UBIFS file-system description object
+ * @buf: buffer containing packed nnode to unpack
+ * @nnode: nnode structure to fill
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int unpack_nnode(struct ubifs_info *c, void *buf,
+ struct ubifs_nnode *nnode)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0, err;
+
+ err = check_lpt_type(&addr, &pos, UBIFS_LPT_NNODE);
+ if (err)
+ return err;
+ if (c->big_lpt)
+ nnode->num = ubifs_unpack_bits(&addr, &pos, c->pcnt_bits);
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ int lnum;
+
+ lnum = ubifs_unpack_bits(&addr, &pos, c->lpt_lnum_bits) +
+ c->lpt_first;
+ if (lnum == c->lpt_last + 1)
+ lnum = 0;
+ nnode->nbranch[i].lnum = lnum;
+ nnode->nbranch[i].offs = ubifs_unpack_bits(&addr, &pos,
+ c->lpt_offs_bits);
+ }
+ err = check_lpt_crc(buf, c->nnode_sz);
+ return err;
+}
+
+/**
+ * unpack_ltab - unpack the LPT's own lprops table.
+ * @c: UBIFS file-system description object
+ * @buf: buffer from which to unpack
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int unpack_ltab(struct ubifs_info *c, void *buf)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0, err;
+
+ err = check_lpt_type(&addr, &pos, UBIFS_LPT_LTAB);
+ if (err)
+ return err;
+ for (i = 0; i < c->lpt_lebs; i++) {
+ int free = ubifs_unpack_bits(&addr, &pos, c->lpt_spc_bits);
+ int dirty = ubifs_unpack_bits(&addr, &pos, c->lpt_spc_bits);
+
+ if (free < 0 || free > c->leb_size || dirty < 0 ||
+ dirty > c->leb_size || free + dirty > c->leb_size)
+ return -EINVAL;
+
+ c->ltab[i].free = free;
+ c->ltab[i].dirty = dirty;
+ c->ltab[i].tgc = 0;
+ c->ltab[i].cmt = 0;
+ }
+ err = check_lpt_crc(buf, c->ltab_sz);
+ return err;
+}
+
+/**
+ * unpack_lsave - unpack the LPT's save table.
+ * @c: UBIFS file-system description object
+ * @buf: buffer from which to unpack
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int unpack_lsave(struct ubifs_info *c, void *buf)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int i, pos = 0, err;
+
+ err = check_lpt_type(&addr, &pos, UBIFS_LPT_LSAVE);
+ if (err)
+ return err;
+ for (i = 0; i < c->lsave_cnt; i++) {
+ int lnum = ubifs_unpack_bits(&addr, &pos, c->lnum_bits);
+
+ if (lnum < c->main_first || lnum >= c->leb_cnt)
+ return -EINVAL;
+ c->lsave[i] = lnum;
+ }
+ err = check_lpt_crc(buf, c->lsave_sz);
+ return err;
+}
+
+/**
+ * validate_nnode - validate a nnode.
+ * @c: UBIFS file-system description object
+ * @nnode: nnode to validate
+ * @parent: parent nnode (or NULL for the root nnode)
+ * @iip: index in parent
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int validate_nnode(struct ubifs_info *c, struct ubifs_nnode *nnode,
+ struct ubifs_nnode *parent, int iip)
+{
+ int i, lvl, max_offs;
+
+ if (c->big_lpt) {
+ int num = calc_nnode_num_from_parent(c, parent, iip);
+
+ if (nnode->num != num)
+ return -EINVAL;
+ }
+ lvl = parent ? parent->level - 1 : c->lpt_hght;
+ if (lvl < 1)
+ return -EINVAL;
+ if (lvl == 1)
+ max_offs = c->leb_size - c->pnode_sz;
+ else
+ max_offs = c->leb_size - c->nnode_sz;
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ int lnum = nnode->nbranch[i].lnum;
+ int offs = nnode->nbranch[i].offs;
+
+ if (lnum == 0) {
+ if (offs != 0)
+ return -EINVAL;
+ continue;
+ }
+ if (lnum < c->lpt_first || lnum > c->lpt_last)
+ return -EINVAL;
+ if (offs < 0 || offs > max_offs)
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/**
+ * validate_pnode - validate a pnode.
+ * @c: UBIFS file-system description object
+ * @pnode: pnode to validate
+ * @parent: parent nnode
+ * @iip: index in parent
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int validate_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode,
+ struct ubifs_nnode *parent, int iip)
+{
+ int i;
+
+ if (c->big_lpt) {
+ int num = calc_pnode_num_from_parent(c, parent, iip);
+
+ if (pnode->num != num)
+ return -EINVAL;
+ }
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ int free = pnode->lprops[i].free;
+ int dirty = pnode->lprops[i].dirty;
+
+ if (free < 0 || free > c->leb_size || free % c->min_io_size ||
+ (free & 7))
+ return -EINVAL;
+ if (dirty < 0 || dirty > c->leb_size || (dirty & 7))
+ return -EINVAL;
+ if (dirty + free > c->leb_size)
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/**
+ * set_pnode_lnum - set LEB numbers on a pnode.
+ * @c: UBIFS file-system description object
+ * @pnode: pnode to update
+ *
+ * This function calculates the LEB numbers for the LEB properties it contains
+ * based on the pnode number.
+ */
+static void set_pnode_lnum(struct ubifs_info *c, struct ubifs_pnode *pnode)
+{
+ int i, lnum;
+
+ lnum = (pnode->num << UBIFS_LPT_FANOUT_SHIFT) + c->main_first;
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ if (lnum >= c->leb_cnt)
+ return;
+ pnode->lprops[i].lnum = lnum++;
+ }
+}
+
+/**
+ * ubifs_read_nnode - read a nnode from flash and link it to the tree in memory.
+ * @c: UBIFS file-system description object
+ * @parent: parent nnode (or NULL for the root)
+ * @iip: index in parent
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_read_nnode(struct ubifs_info *c, struct ubifs_nnode *parent, int iip)
+{
+ struct ubifs_nbranch *branch = NULL;
+ struct ubifs_nnode *nnode = NULL;
+ void *buf = c->lpt_nod_buf;
+ int err, lnum, offs;
+
+ if (parent) {
+ branch = &parent->nbranch[iip];
+ lnum = branch->lnum;
+ offs = branch->offs;
+ } else {
+ lnum = c->lpt_lnum;
+ offs = c->lpt_offs;
+ }
+ nnode = kzalloc(sizeof(struct ubifs_nnode), GFP_NOFS);
+ if (!nnode) {
+ err = -ENOMEM;
+ goto out;
+ }
+ if (lnum == 0) {
+ /*
+ * This nnode was not written which just means that the LEB
+ * properties in the subtree below it describe empty LEBs. We
+ * make the nnode as though we had read it, which in fact means
+ * doing almost nothing.
+ */
+ if (c->big_lpt)
+ nnode->num = calc_nnode_num_from_parent(c, parent, iip);
+ } else {
+ err = ubi_read(c->ubi, lnum, buf, offs, c->nnode_sz);
+ if (err)
+ goto out;
+ err = unpack_nnode(c, buf, nnode);
+ if (err)
+ goto out;
+ }
+ err = validate_nnode(c, nnode, parent, iip);
+ if (err)
+ goto out;
+ if (!c->big_lpt)
+ nnode->num = calc_nnode_num_from_parent(c, parent, iip);
+ if (parent) {
+ branch->nnode = nnode;
+ nnode->level = parent->level - 1;
+ } else {
+ c->nroot = nnode;
+ nnode->level = c->lpt_hght;
+ }
+ nnode->parent = parent;
+ nnode->iip = iip;
+ return 0;
+
+out:
+ ubifs_err("error %d reading nnode at %d:%d", err, lnum, offs);
+ kfree(nnode);
+ return err;
+}
+
+/**
+ * read_pnode - read a pnode from flash and link it to the tree in memory.
+ * @c: UBIFS file-system description object
+ * @parent: parent nnode
+ * @iip: index in parent
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int read_pnode(struct ubifs_info *c, struct ubifs_nnode *parent, int iip)
+{
+ struct ubifs_nbranch *branch;
+ struct ubifs_pnode *pnode = NULL;
+ void *buf = c->lpt_nod_buf;
+ int err, lnum, offs;
+
+ branch = &parent->nbranch[iip];
+ lnum = branch->lnum;
+ offs = branch->offs;
+ pnode = kzalloc(sizeof(struct ubifs_pnode), GFP_NOFS);
+ if (!pnode) {
+ err = -ENOMEM;
+ goto out;
+ }
+ if (lnum == 0) {
+ /*
+ * This pnode was not written which just means that the LEB
+ * properties in it describe empty LEBs. We make the pnode as
+ * though we had read it.
+ */
+ int i;
+
+ if (c->big_lpt)
+ pnode->num = calc_pnode_num_from_parent(c, parent, iip);
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ struct ubifs_lprops * const lprops = &pnode->lprops[i];
+
+ lprops->free = c->leb_size;
+ lprops->flags = ubifs_categorize_lprops(c, lprops);
+ }
+ } else {
+ err = ubi_read(c->ubi, lnum, buf, offs, c->pnode_sz);
+ if (err)
+ goto out;
+ err = unpack_pnode(c, buf, pnode);
+ if (err)
+ goto out;
+ }
+ err = validate_pnode(c, pnode, parent, iip);
+ if (err)
+ goto out;
+ if (!c->big_lpt)
+ pnode->num = calc_pnode_num_from_parent(c, parent, iip);
+ branch->pnode = pnode;
+ pnode->parent = parent;
+ pnode->iip = iip;
+ set_pnode_lnum(c, pnode);
+ c->pnodes_have += 1;
+ return 0;
+
+out:
+ ubifs_err("error %d reading pnode at %d:%d", err, lnum, offs);
+ dbg_dump_pnode(c, pnode, parent, iip);
+ dbg_msg("calc num: %d", calc_pnode_num_from_parent(c, parent, iip));
+ kfree(pnode);
+ return err;
+}
+
+/**
+ * read_ltab - read LPT's own lprops table.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int read_ltab(struct ubifs_info *c)
+{
+ int err;
+ void *buf;
+
+ buf = vmalloc(c->ltab_sz);
+ if (!buf)
+ return -ENOMEM;
+ err = ubi_read(c->ubi, c->ltab_lnum, buf, c->ltab_offs, c->ltab_sz);
+ if (err)
+ goto out;
+ err = unpack_ltab(c, buf);
+out:
+ vfree(buf);
+ return err;
+}
+
+/**
+ * read_lsave - read LPT's save table.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int read_lsave(struct ubifs_info *c)
+{
+ int err, i;
+ void *buf;
+
+ buf = vmalloc(c->lsave_sz);
+ if (!buf)
+ return -ENOMEM;
+ err = ubi_read(c->ubi, c->lsave_lnum, buf, c->lsave_offs, c->lsave_sz);
+ if (err)
+ goto out;
+ err = unpack_lsave(c, buf);
+ if (err)
+ goto out;
+ for (i = 0; i < c->lsave_cnt; i++) {
+ int lnum = c->lsave[i];
+
+ /*
+ * Due to automatic resizing, the values in the lsave table
+ * could be beyond the volume size - just ignore them.
+ */
+ if (lnum >= c->leb_cnt)
+ continue;
+ ubifs_lpt_lookup(c, lnum);
+ }
+out:
+ vfree(buf);
+ return err;
+}
+
+/**
+ * ubifs_get_nnode - get a nnode.
+ * @c: UBIFS file-system description object
+ * @parent: parent nnode (or NULL for the root)
+ * @iip: index in parent
+ *
+ * This function returns a pointer to the nnode on success or a negative error
+ * code on failure.
+ */
+struct ubifs_nnode *ubifs_get_nnode(struct ubifs_info *c,
+ struct ubifs_nnode *parent, int iip)
+{
+ struct ubifs_nbranch *branch;
+ struct ubifs_nnode *nnode;
+ int err;
+
+ branch = &parent->nbranch[iip];
+ nnode = branch->nnode;
+ if (nnode)
+ return nnode;
+ err = ubifs_read_nnode(c, parent, iip);
+ if (err)
+ return ERR_PTR(err);
+ return branch->nnode;
+}
+
+/**
+ * ubifs_get_pnode - get a pnode.
+ * @c: UBIFS file-system description object
+ * @parent: parent nnode
+ * @iip: index in parent
+ *
+ * This function returns a pointer to the pnode on success or a negative error
+ * code on failure.
+ */
+struct ubifs_pnode *ubifs_get_pnode(struct ubifs_info *c,
+ struct ubifs_nnode *parent, int iip)
+{
+ struct ubifs_nbranch *branch;
+ struct ubifs_pnode *pnode;
+ int err;
+
+ branch = &parent->nbranch[iip];
+ pnode = branch->pnode;
+ if (pnode)
+ return pnode;
+ err = read_pnode(c, parent, iip);
+ if (err)
+ return ERR_PTR(err);
+ update_cats(c, branch->pnode);
+ return branch->pnode;
+}
+
+/**
+ * ubifs_lpt_lookup - lookup LEB properties in the LPT.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number to lookup
+ *
+ * This function returns a pointer to the LEB properties on success or a
+ * negative error code on failure.
+ */
+struct ubifs_lprops *ubifs_lpt_lookup(struct ubifs_info *c, int lnum)
+{
+ int err, i, h, iip, shft;
+ struct ubifs_nnode *nnode;
+ struct ubifs_pnode *pnode;
+
+ if (!c->nroot) {
+ err = ubifs_read_nnode(c, NULL, 0);
+ if (err)
+ return ERR_PTR(err);
+ }
+ nnode = c->nroot;
+ i = lnum - c->main_first;
+ shft = c->lpt_hght * UBIFS_LPT_FANOUT_SHIFT;
+ for (h = 1; h < c->lpt_hght; h++) {
+ iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
+ shft -= UBIFS_LPT_FANOUT_SHIFT;
+ nnode = ubifs_get_nnode(c, nnode, iip);
+ if (IS_ERR(nnode))
+ return ERR_PTR(PTR_ERR(nnode));
+ }
+ iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
+ shft -= UBIFS_LPT_FANOUT_SHIFT;
+ pnode = ubifs_get_pnode(c, nnode, iip);
+ if (IS_ERR(pnode))
+ return ERR_PTR(PTR_ERR(pnode));
+ iip = (i & (UBIFS_LPT_FANOUT - 1));
+ dbg_lp("LEB %d, free %d, dirty %d, flags %d", lnum,
+ pnode->lprops[iip].free, pnode->lprops[iip].dirty,
+ pnode->lprops[iip].flags);
+ return &pnode->lprops[iip];
+}
+
+/**
+ * dirty_cow_nnode - ensure a nnode is not being committed.
+ * @c: UBIFS file-system description object
+ * @nnode: nnode to check
+ *
+ * Returns dirtied nnode on success or negative error code on failure.
+ */
+static struct ubifs_nnode *dirty_cow_nnode(struct ubifs_info *c,
+ struct ubifs_nnode *nnode)
+{
+ struct ubifs_nnode *n;
+ int i;
+
+ if (!test_bit(COW_CNODE, &nnode->flags)) {
+ /* nnode is not being committed */
+ if (!test_and_set_bit(DIRTY_CNODE, &nnode->flags)) {
+ c->dirty_nn_cnt += 1;
+ ubifs_add_nnode_dirt(c, nnode);
+ }
+ return nnode;
+ }
+
+ /* nnode is being committed, so copy it */
+ n = kmalloc(sizeof(struct ubifs_nnode), GFP_NOFS);
+ if (unlikely(!n))
+ return ERR_PTR(-ENOMEM);
+
+ memcpy(n, nnode, sizeof(struct ubifs_nnode));
+ n->cnext = NULL;
+ __set_bit(DIRTY_CNODE, &n->flags);
+ __clear_bit(COW_CNODE, &n->flags);
+
+ /* The children now have new parent */
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ struct ubifs_nbranch *branch = &n->nbranch[i];
+
+ if (branch->cnode)
+ branch->cnode->parent = n;
+ }
+
+ ubifs_assert(!test_bit(OBSOLETE_CNODE, &nnode->flags));
+ __set_bit(OBSOLETE_CNODE, &nnode->flags);
+
+ c->dirty_nn_cnt += 1;
+ ubifs_add_nnode_dirt(c, nnode);
+ if (nnode->parent)
+ nnode->parent->nbranch[n->iip].nnode = n;
+ else
+ c->nroot = n;
+ return n;
+}
+
+/**
+ * dirty_cow_pnode - ensure a pnode is not being committed.
+ * @c: UBIFS file-system description object
+ * @pnode: pnode to check
+ *
+ * Returns dirtied pnode on success or negative error code on failure.
+ */
+static struct ubifs_pnode *dirty_cow_pnode(struct ubifs_info *c,
+ struct ubifs_pnode *pnode)
+{
+ struct ubifs_pnode *p;
+
+ if (!test_bit(COW_CNODE, &pnode->flags)) {
+ /* pnode is not being committed */
+ if (!test_and_set_bit(DIRTY_CNODE, &pnode->flags)) {
+ c->dirty_pn_cnt += 1;
+ add_pnode_dirt(c, pnode);
+ }
+ return pnode;
+ }
+
+ /* pnode is being committed, so copy it */
+ p = kmalloc(sizeof(struct ubifs_pnode), GFP_NOFS);
+ if (unlikely(!p))
+ return ERR_PTR(-ENOMEM);
+
+ memcpy(p, pnode, sizeof(struct ubifs_pnode));
+ p->cnext = NULL;
+ __set_bit(DIRTY_CNODE, &p->flags);
+ __clear_bit(COW_CNODE, &p->flags);
+ replace_cats(c, pnode, p);
+
+ ubifs_assert(!test_bit(OBSOLETE_CNODE, &pnode->flags));
+ __set_bit(OBSOLETE_CNODE, &pnode->flags);
+
+ c->dirty_pn_cnt += 1;
+ add_pnode_dirt(c, pnode);
+ pnode->parent->nbranch[p->iip].pnode = p;
+ return p;
+}
+
+/**
+ * ubifs_lpt_lookup_dirty - lookup LEB properties in the LPT.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number to lookup
+ *
+ * This function returns a pointer to the LEB properties on success or a
+ * negative error code on failure.
+ */
+struct ubifs_lprops *ubifs_lpt_lookup_dirty(struct ubifs_info *c, int lnum)
+{
+ int err, i, h, iip, shft;
+ struct ubifs_nnode *nnode;
+ struct ubifs_pnode *pnode;
+
+ if (!c->nroot) {
+ err = ubifs_read_nnode(c, NULL, 0);
+ if (err)
+ return ERR_PTR(err);
+ }
+ nnode = c->nroot;
+ nnode = dirty_cow_nnode(c, nnode);
+ if (IS_ERR(nnode))
+ return ERR_PTR(PTR_ERR(nnode));
+ i = lnum - c->main_first;
+ shft = c->lpt_hght * UBIFS_LPT_FANOUT_SHIFT;
+ for (h = 1; h < c->lpt_hght; h++) {
+ iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
+ shft -= UBIFS_LPT_FANOUT_SHIFT;
+ nnode = ubifs_get_nnode(c, nnode, iip);
+ if (IS_ERR(nnode))
+ return ERR_PTR(PTR_ERR(nnode));
+ nnode = dirty_cow_nnode(c, nnode);
+ if (IS_ERR(nnode))
+ return ERR_PTR(PTR_ERR(nnode));
+ }
+ iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
+ shft -= UBIFS_LPT_FANOUT_SHIFT;
+ pnode = ubifs_get_pnode(c, nnode, iip);
+ if (IS_ERR(pnode))
+ return ERR_PTR(PTR_ERR(pnode));
+ pnode = dirty_cow_pnode(c, pnode);
+ if (IS_ERR(pnode))
+ return ERR_PTR(PTR_ERR(pnode));
+ iip = (i & (UBIFS_LPT_FANOUT - 1));
+ dbg_lp("LEB %d, free %d, dirty %d, flags %d", lnum,
+ pnode->lprops[iip].free, pnode->lprops[iip].dirty,
+ pnode->lprops[iip].flags);
+ ubifs_assert(test_bit(DIRTY_CNODE, &pnode->flags));
+ return &pnode->lprops[iip];
+}
+
+/**
+ * lpt_init_rd - initialize the LPT for reading.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int lpt_init_rd(struct ubifs_info *c)
+{
+ int err, i;
+
+ c->ltab = vmalloc(sizeof(struct ubifs_lpt_lprops) * c->lpt_lebs);
+ if (!c->ltab)
+ return -ENOMEM;
+
+ i = max_t(int, c->nnode_sz, c->pnode_sz);
+ c->lpt_nod_buf = kmalloc(i, GFP_KERNEL);
+ if (!c->lpt_nod_buf)
+ return -ENOMEM;
+
+ for (i = 0; i < LPROPS_HEAP_CNT; i++) {
+ c->lpt_heap[i].arr = kmalloc(sizeof(void *) * LPT_HEAP_SZ,
+ GFP_KERNEL);
+ if (!c->lpt_heap[i].arr)
+ return -ENOMEM;
+ c->lpt_heap[i].cnt = 0;
+ c->lpt_heap[i].max_cnt = LPT_HEAP_SZ;
+ }
+
+ c->dirty_idx.arr = kmalloc(sizeof(void *) * LPT_HEAP_SZ, GFP_KERNEL);
+ if (!c->dirty_idx.arr)
+ return -ENOMEM;
+ c->dirty_idx.cnt = 0;
+ c->dirty_idx.max_cnt = LPT_HEAP_SZ;
+
+ err = read_ltab(c);
+ if (err)
+ return err;
+
+ dbg_lp("space_bits %d", c->space_bits);
+ dbg_lp("lpt_lnum_bits %d", c->lpt_lnum_bits);
+ dbg_lp("lpt_offs_bits %d", c->lpt_offs_bits);
+ dbg_lp("lpt_spc_bits %d", c->lpt_spc_bits);
+ dbg_lp("pcnt_bits %d", c->pcnt_bits);
+ dbg_lp("lnum_bits %d", c->lnum_bits);
+ dbg_lp("pnode_sz %d", c->pnode_sz);
+ dbg_lp("nnode_sz %d", c->nnode_sz);
+ dbg_lp("ltab_sz %d", c->ltab_sz);
+ dbg_lp("lsave_sz %d", c->lsave_sz);
+ dbg_lp("lsave_cnt %d", c->lsave_cnt);
+ dbg_lp("lpt_hght %d", c->lpt_hght);
+ dbg_lp("big_lpt %d", c->big_lpt);
+ dbg_lp("LPT root is at %d:%d", c->lpt_lnum, c->lpt_offs);
+ dbg_lp("LPT head is at %d:%d", c->nhead_lnum, c->nhead_offs);
+ dbg_lp("LPT ltab is at %d:%d", c->ltab_lnum, c->ltab_offs);
+ if (c->big_lpt)
+ dbg_lp("LPT lsave is at %d:%d", c->lsave_lnum, c->lsave_offs);
+
+ return 0;
+}
+
+/**
+ * lpt_init_wr - initialize the LPT for writing.
+ * @c: UBIFS file-system description object
+ *
+ * 'lpt_init_rd()' must have been called already.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int lpt_init_wr(struct ubifs_info *c)
+{
+ int err, i;
+
+ c->ltab_cmt = vmalloc(sizeof(struct ubifs_lpt_lprops) * c->lpt_lebs);
+ if (!c->ltab_cmt)
+ return -ENOMEM;
+
+ c->lpt_buf = vmalloc(c->leb_size);
+ if (!c->lpt_buf)
+ return -ENOMEM;
+
+ if (c->big_lpt) {
+ c->lsave = kmalloc(sizeof(int) * c->lsave_cnt, GFP_NOFS);
+ if (!c->lsave)
+ return -ENOMEM;
+ err = read_lsave(c);
+ if (err)
+ return err;
+ }
+
+ for (i = 0; i < c->lpt_lebs; i++)
+ if (c->ltab[i].free == c->leb_size) {
+ err = ubifs_leb_unmap(c, i + c->lpt_first);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * ubifs_lpt_init - initialize the LPT.
+ * @c: UBIFS file-system description object
+ * @rd: whether to initialize lpt for reading
+ * @wr: whether to initialize lpt for writing
+ *
+ * For mounting 'rw', @rd and @wr are both true. For mounting 'ro', @rd is true
+ * and @wr is false. For mounting from 'ro' to 'rw', @rd is false and @wr is
+ * true.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_lpt_init(struct ubifs_info *c, int rd, int wr)
+{
+ int err;
+
+ if (rd) {
+ err = lpt_init_rd(c);
+ if (err)
+ return err;
+ }
+
+ if (wr) {
+ err = lpt_init_wr(c);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * struct lpt_scan_node - somewhere to put nodes while we scan LPT.
+ * @nnode: where to keep a nnode
+ * @pnode: where to keep a pnode
+ * @cnode: where to keep a cnode
+ * @in_tree: is the node in the tree in memory
+ * @ptr.nnode: pointer to the nnode (if it is an nnode) which may be here or in
+ * the tree
+ * @ptr.pnode: ditto for pnode
+ * @ptr.cnode: ditto for cnode
+ */
+struct lpt_scan_node {
+ union {
+ struct ubifs_nnode nnode;
+ struct ubifs_pnode pnode;
+ struct ubifs_cnode cnode;
+ };
+ int in_tree;
+ union {
+ struct ubifs_nnode *nnode;
+ struct ubifs_pnode *pnode;
+ struct ubifs_cnode *cnode;
+ } ptr;
+};
+
+/**
+ * scan_get_nnode - for the scan, get a nnode from either the tree or flash.
+ * @c: the UBIFS file-system description object
+ * @path: where to put the nnode
+ * @parent: parent of the nnode
+ * @iip: index in parent of the nnode
+ *
+ * This function returns a pointer to the nnode on success or a negative error
+ * code on failure.
+ */
+static struct ubifs_nnode *scan_get_nnode(struct ubifs_info *c,
+ struct lpt_scan_node *path,
+ struct ubifs_nnode *parent, int iip)
+{
+ struct ubifs_nbranch *branch;
+ struct ubifs_nnode *nnode;
+ void *buf = c->lpt_nod_buf;
+ int err;
+
+ branch = &parent->nbranch[iip];
+ nnode = branch->nnode;
+ if (nnode) {
+ path->in_tree = 1;
+ path->ptr.nnode = nnode;
+ return nnode;
+ }
+ nnode = &path->nnode;
+ path->in_tree = 0;
+ path->ptr.nnode = nnode;
+ memset(nnode, 0, sizeof(struct ubifs_nnode));
+ if (branch->lnum == 0) {
+ /*
+ * This nnode was not written which just means that the LEB
+ * properties in the subtree below it describe empty LEBs. We
+ * make the nnode as though we had read it, which in fact means
+ * doing almost nothing.
+ */
+ if (c->big_lpt)
+ nnode->num = calc_nnode_num_from_parent(c, parent, iip);
+ } else {
+ err = ubi_read(c->ubi, branch->lnum, buf, branch->offs,
+ c->nnode_sz);
+ if (err)
+ return ERR_PTR(err);
+ err = unpack_nnode(c, buf, nnode);
+ if (err)
+ return ERR_PTR(err);
+ }
+ err = validate_nnode(c, nnode, parent, iip);
+ if (err)
+ return ERR_PTR(err);
+ if (!c->big_lpt)
+ nnode->num = calc_nnode_num_from_parent(c, parent, iip);
+ nnode->level = parent->level - 1;
+ nnode->parent = parent;
+ nnode->iip = iip;
+ return nnode;
+}
+
+/**
+ * scan_get_pnode - for the scan, get a pnode from either the tree or flash.
+ * @c: the UBIFS file-system description object
+ * @path: where to put the pnode
+ * @parent: parent of the pnode
+ * @iip: index in parent of the pnode
+ *
+ * This function returns a pointer to the pnode on success or a negative error
+ * code on failure.
+ */
+static struct ubifs_pnode *scan_get_pnode(struct ubifs_info *c,
+ struct lpt_scan_node *path,
+ struct ubifs_nnode *parent, int iip)
+{
+ struct ubifs_nbranch *branch;
+ struct ubifs_pnode *pnode;
+ void *buf = c->lpt_nod_buf;
+ int err;
+
+ branch = &parent->nbranch[iip];
+ pnode = branch->pnode;
+ if (pnode) {
+ path->in_tree = 1;
+ path->ptr.pnode = pnode;
+ return pnode;
+ }
+ pnode = &path->pnode;
+ path->in_tree = 0;
+ path->ptr.pnode = pnode;
+ memset(pnode, 0, sizeof(struct ubifs_pnode));
+ if (branch->lnum == 0) {
+ /*
+ * This pnode was not written which just means that the LEB
+ * properties in it describe empty LEBs. We make the pnode as
+ * though we had read it.
+ */
+ int i;
+
+ if (c->big_lpt)
+ pnode->num = calc_pnode_num_from_parent(c, parent, iip);
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ struct ubifs_lprops * const lprops = &pnode->lprops[i];
+
+ lprops->free = c->leb_size;
+ lprops->flags = ubifs_categorize_lprops(c, lprops);
+ }
+ } else {
+ ubifs_assert(branch->lnum >= c->lpt_first &&
+ branch->lnum <= c->lpt_last);
+ ubifs_assert(branch->offs >= 0 && branch->offs < c->leb_size);
+ err = ubi_read(c->ubi, branch->lnum, buf, branch->offs,
+ c->pnode_sz);
+ if (err)
+ return ERR_PTR(err);
+ err = unpack_pnode(c, buf, pnode);
+ if (err)
+ return ERR_PTR(err);
+ }
+ err = validate_pnode(c, pnode, parent, iip);
+ if (err)
+ return ERR_PTR(err);
+ if (!c->big_lpt)
+ pnode->num = calc_pnode_num_from_parent(c, parent, iip);
+ pnode->parent = parent;
+ pnode->iip = iip;
+ set_pnode_lnum(c, pnode);
+ return pnode;
+}
+
+/**
+ * ubifs_lpt_scan_nolock - scan the LPT.
+ * @c: the UBIFS file-system description object
+ * @start_lnum: LEB number from which to start scanning
+ * @end_lnum: LEB number at which to stop scanning
+ * @scan_cb: callback function called for each lprops
+ * @data: data to be passed to the callback function
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_lpt_scan_nolock(struct ubifs_info *c, int start_lnum, int end_lnum,
+ ubifs_lpt_scan_callback scan_cb, void *data)
+{
+ int err = 0, i, h, iip, shft;
+ struct ubifs_nnode *nnode;
+ struct ubifs_pnode *pnode;
+ struct lpt_scan_node *path;
+
+ if (start_lnum == -1) {
+ start_lnum = end_lnum + 1;
+ if (start_lnum >= c->leb_cnt)
+ start_lnum = c->main_first;
+ }
+
+ ubifs_assert(start_lnum >= c->main_first && start_lnum < c->leb_cnt);
+ ubifs_assert(end_lnum >= c->main_first && end_lnum < c->leb_cnt);
+
+ if (!c->nroot) {
+ err = ubifs_read_nnode(c, NULL, 0);
+ if (err)
+ return err;
+ }
+
+ path = kmalloc(sizeof(struct lpt_scan_node) * (c->lpt_hght + 1),
+ GFP_NOFS);
+ if (!path)
+ return -ENOMEM;
+
+ path[0].ptr.nnode = c->nroot;
+ path[0].in_tree = 1;
+again:
+ /* Descend to the pnode containing start_lnum */
+ nnode = c->nroot;
+ i = start_lnum - c->main_first;
+ shft = c->lpt_hght * UBIFS_LPT_FANOUT_SHIFT;
+ for (h = 1; h < c->lpt_hght; h++) {
+ iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
+ shft -= UBIFS_LPT_FANOUT_SHIFT;
+ nnode = scan_get_nnode(c, path + h, nnode, iip);
+ if (IS_ERR(nnode)) {
+ err = PTR_ERR(nnode);
+ goto out;
+ }
+ }
+ iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
+ shft -= UBIFS_LPT_FANOUT_SHIFT;
+ pnode = scan_get_pnode(c, path + h, nnode, iip);
+ if (IS_ERR(pnode)) {
+ err = PTR_ERR(pnode);
+ goto out;
+ }
+ iip = (i & (UBIFS_LPT_FANOUT - 1));
+
+ /* Loop for each lprops */
+ while (1) {
+ struct ubifs_lprops *lprops = &pnode->lprops[iip];
+ int ret, lnum = lprops->lnum;
+
+ ret = scan_cb(c, lprops, path[h].in_tree, data);
+ if (ret < 0) {
+ err = ret;
+ goto out;
+ }
+ if (ret & LPT_SCAN_ADD) {
+ /* Add all the nodes in path to the tree in memory */
+ for (h = 1; h < c->lpt_hght; h++) {
+ const size_t sz = sizeof(struct ubifs_nnode);
+ struct ubifs_nnode *parent;
+
+ if (path[h].in_tree)
+ continue;
+ nnode = kmalloc(sz, GFP_NOFS);
+ if (!nnode) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(nnode, &path[h].nnode, sz);
+ parent = nnode->parent;
+ parent->nbranch[nnode->iip].nnode = nnode;
+ path[h].ptr.nnode = nnode;
+ path[h].in_tree = 1;
+ path[h + 1].cnode.parent = nnode;
+ }
+ if (path[h].in_tree)
+ ubifs_ensure_cat(c, lprops);
+ else {
+ const size_t sz = sizeof(struct ubifs_pnode);
+ struct ubifs_nnode *parent;
+
+ pnode = kmalloc(sz, GFP_NOFS);
+ if (!pnode) {
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(pnode, &path[h].pnode, sz);
+ parent = pnode->parent;
+ parent->nbranch[pnode->iip].pnode = pnode;
+ path[h].ptr.pnode = pnode;
+ path[h].in_tree = 1;
+ update_cats(c, pnode);
+ c->pnodes_have += 1;
+ }
+ err = dbg_check_lpt_nodes(c, (struct ubifs_cnode *)
+ c->nroot, 0, 0);
+ if (err)
+ goto out;
+ err = dbg_check_cats(c);
+ if (err)
+ goto out;
+ }
+ if (ret & LPT_SCAN_STOP) {
+ err = 0;
+ break;
+ }
+ /* Get the next lprops */
+ if (lnum == end_lnum) {
+ /*
+ * We got to the end without finding what we were
+ * looking for
+ */
+ err = -ENOSPC;
+ goto out;
+ }
+ if (lnum + 1 >= c->leb_cnt) {
+ /* Wrap-around to the beginning */
+ start_lnum = c->main_first;
+ goto again;
+ }
+ if (iip + 1 < UBIFS_LPT_FANOUT) {
+ /* Next lprops is in the same pnode */
+ iip += 1;
+ continue;
+ }
+ /* We need to get the next pnode. Go up until we can go right */
+ iip = pnode->iip;
+ while (1) {
+ h -= 1;
+ ubifs_assert(h >= 0);
+ nnode = path[h].ptr.nnode;
+ if (iip + 1 < UBIFS_LPT_FANOUT)
+ break;
+ iip = nnode->iip;
+ }
+ /* Go right */
+ iip += 1;
+ /* Descend to the pnode */
+ h += 1;
+ for (; h < c->lpt_hght; h++) {
+ nnode = scan_get_nnode(c, path + h, nnode, iip);
+ if (IS_ERR(nnode)) {
+ err = PTR_ERR(nnode);
+ goto out;
+ }
+ iip = 0;
+ }
+ pnode = scan_get_pnode(c, path + h, nnode, iip);
+ if (IS_ERR(pnode)) {
+ err = PTR_ERR(pnode);
+ goto out;
+ }
+ iip = 0;
+ }
+out:
+ kfree(path);
+ return err;
+}
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+
+/**
+ * dbg_chk_pnode - check a pnode.
+ * @c: the UBIFS file-system description object
+ * @pnode: pnode to check
+ * @col: pnode column
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int dbg_chk_pnode(struct ubifs_info *c, struct ubifs_pnode *pnode,
+ int col)
+{
+ int i;
+
+ if (pnode->num != col) {
+ dbg_err("pnode num %d expected %d parent num %d iip %d",
+ pnode->num, col, pnode->parent->num, pnode->iip);
+ return -EINVAL;
+ }
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ struct ubifs_lprops *lp, *lprops = &pnode->lprops[i];
+ int lnum = (pnode->num << UBIFS_LPT_FANOUT_SHIFT) + i +
+ c->main_first;
+ int found, cat = lprops->flags & LPROPS_CAT_MASK;
+ struct ubifs_lpt_heap *heap;
+ struct list_head *list = NULL;
+
+ if (lnum >= c->leb_cnt)
+ continue;
+ if (lprops->lnum != lnum) {
+ dbg_err("bad LEB number %d expected %d",
+ lprops->lnum, lnum);
+ return -EINVAL;
+ }
+ if (lprops->flags & LPROPS_TAKEN) {
+ if (cat != LPROPS_UNCAT) {
+ dbg_err("LEB %d taken but not uncat %d",
+ lprops->lnum, cat);
+ return -EINVAL;
+ }
+ continue;
+ }
+ if (lprops->flags & LPROPS_INDEX) {
+ switch (cat) {
+ case LPROPS_UNCAT:
+ case LPROPS_DIRTY_IDX:
+ case LPROPS_FRDI_IDX:
+ break;
+ default:
+ dbg_err("LEB %d index but cat %d",
+ lprops->lnum, cat);
+ return -EINVAL;
+ }
+ } else {
+ switch (cat) {
+ case LPROPS_UNCAT:
+ case LPROPS_DIRTY:
+ case LPROPS_FREE:
+ case LPROPS_EMPTY:
+ case LPROPS_FREEABLE:
+ break;
+ default:
+ dbg_err("LEB %d not index but cat %d",
+ lprops->lnum, cat);
+ return -EINVAL;
+ }
+ }
+ switch (cat) {
+ case LPROPS_UNCAT:
+ list = &c->uncat_list;
+ break;
+ case LPROPS_EMPTY:
+ list = &c->empty_list;
+ break;
+ case LPROPS_FREEABLE:
+ list = &c->freeable_list;
+ break;
+ case LPROPS_FRDI_IDX:
+ list = &c->frdi_idx_list;
+ break;
+ }
+ found = 0;
+ switch (cat) {
+ case LPROPS_DIRTY:
+ case LPROPS_DIRTY_IDX:
+ case LPROPS_FREE:
+ heap = &c->lpt_heap[cat - 1];
+ if (lprops->hpos < heap->cnt &&
+ heap->arr[lprops->hpos] == lprops)
+ found = 1;
+ break;
+ case LPROPS_UNCAT:
+ case LPROPS_EMPTY:
+ case LPROPS_FREEABLE:
+ case LPROPS_FRDI_IDX:
+ list_for_each_entry(lp, list, list)
+ if (lprops == lp) {
+ found = 1;
+ break;
+ }
+ break;
+ }
+ if (!found) {
+ dbg_err("LEB %d cat %d not found in cat heap/list",
+ lprops->lnum, cat);
+ return -EINVAL;
+ }
+ switch (cat) {
+ case LPROPS_EMPTY:
+ if (lprops->free != c->leb_size) {
+ dbg_err("LEB %d cat %d free %d dirty %d",
+ lprops->lnum, cat, lprops->free,
+ lprops->dirty);
+ return -EINVAL;
+ }
+ case LPROPS_FREEABLE:
+ case LPROPS_FRDI_IDX:
+ if (lprops->free + lprops->dirty != c->leb_size) {
+ dbg_err("LEB %d cat %d free %d dirty %d",
+ lprops->lnum, cat, lprops->free,
+ lprops->dirty);
+ return -EINVAL;
+ }
+ }
+ }
+ return 0;
+}
+
+/**
+ * dbg_check_lpt_nodes - check nnodes and pnodes.
+ * @c: the UBIFS file-system description object
+ * @cnode: next cnode (nnode or pnode) to check
+ * @row: row of cnode (root is zero)
+ * @col: column of cnode (leftmost is zero)
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int dbg_check_lpt_nodes(struct ubifs_info *c, struct ubifs_cnode *cnode,
+ int row, int col)
+{
+ struct ubifs_nnode *nnode, *nn;
+ struct ubifs_cnode *cn;
+ int num, iip = 0, err;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_LPROPS))
+ return 0;
+
+ while (cnode) {
+ ubifs_assert(row >= 0);
+ nnode = cnode->parent;
+ if (cnode->level) {
+ /* cnode is a nnode */
+ num = calc_nnode_num(row, col);
+ if (cnode->num != num) {
+ dbg_err("nnode num %d expected %d "
+ "parent num %d iip %d", cnode->num, num,
+ (nnode ? nnode->num : 0), cnode->iip);
+ return -EINVAL;
+ }
+ nn = (struct ubifs_nnode *)cnode;
+ while (iip < UBIFS_LPT_FANOUT) {
+ cn = nn->nbranch[iip].cnode;
+ if (cn) {
+ /* Go down */
+ row += 1;
+ col <<= UBIFS_LPT_FANOUT_SHIFT;
+ col += iip;
+ iip = 0;
+ cnode = cn;
+ break;
+ }
+ /* Go right */
+ iip += 1;
+ }
+ if (iip < UBIFS_LPT_FANOUT)
+ continue;
+ } else {
+ struct ubifs_pnode *pnode;
+
+ /* cnode is a pnode */
+ pnode = (struct ubifs_pnode *)cnode;
+ err = dbg_chk_pnode(c, pnode, col);
+ if (err)
+ return err;
+ }
+ /* Go up and to the right */
+ row -= 1;
+ col >>= UBIFS_LPT_FANOUT_SHIFT;
+ iip = cnode->iip + 1;
+ cnode = (struct ubifs_cnode *)nnode;
+ }
+ return 0;
+}
+
+#endif /* CONFIG_UBIFS_FS_DEBUG */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/lpt_commit.c avr32-2.6/fs/ubifs/lpt_commit.c
--- linux-2.6.25.6/fs/ubifs/lpt_commit.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/lpt_commit.c 2008-06-12 15:09:45.475816115 +0200
@@ -0,0 +1,1631 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file implements commit-related functionality of the LEB properties
+ * subsystem.
+ */
+
+#include <linux/crc16.h>
+#include "ubifs.h"
+
+/**
+ * first_dirty_cnode - find first dirty cnode.
+ * @c: UBIFS file-system description object
+ * @nnode: nnode at which to start
+ *
+ * This function returns the first dirty cnode or %NULL if there is not one.
+ */
+static struct ubifs_cnode *first_dirty_cnode(struct ubifs_nnode *nnode)
+{
+ ubifs_assert(nnode);
+ while (1) {
+ int i, cont = 0;
+
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ struct ubifs_cnode *cnode;
+
+ cnode = nnode->nbranch[i].cnode;
+ if (cnode &&
+ test_bit(DIRTY_CNODE, &cnode->flags)) {
+ if (cnode->level == 0)
+ return cnode;
+ nnode = (struct ubifs_nnode *)cnode;
+ cont = 1;
+ break;
+ }
+ }
+ if (!cont)
+ return (struct ubifs_cnode *)nnode;
+ }
+}
+
+/**
+ * next_dirty_cnode - find next dirty cnode.
+ * @cnode: cnode from which to begin searching
+ *
+ * This function returns the next dirty cnode or %NULL if there is not one.
+ */
+static struct ubifs_cnode *next_dirty_cnode(struct ubifs_cnode *cnode)
+{
+ struct ubifs_nnode *nnode;
+ int i;
+
+ ubifs_assert(cnode);
+ nnode = cnode->parent;
+ if (!nnode)
+ return NULL;
+ for (i = cnode->iip + 1; i < UBIFS_LPT_FANOUT; i++) {
+ cnode = nnode->nbranch[i].cnode;
+ if (cnode && test_bit(DIRTY_CNODE, &cnode->flags)) {
+ if (cnode->level == 0)
+ return cnode; /* cnode is a pnode */
+ /* cnode is a nnode */
+ return first_dirty_cnode((struct ubifs_nnode *)cnode);
+ }
+ }
+ return (struct ubifs_cnode *)nnode;
+}
+
+/**
+ * get_cnodes_to_commit - create list of dirty cnodes to commit.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns the number of cnodes to commit.
+ */
+static int get_cnodes_to_commit(struct ubifs_info *c)
+{
+ struct ubifs_cnode *cnode, *cnext;
+ int cnt = 0;
+
+ if (!c->nroot)
+ return 0;
+
+ if (!test_bit(DIRTY_CNODE, &c->nroot->flags))
+ return 0;
+
+ c->lpt_cnext = first_dirty_cnode(c->nroot);
+ cnode = c->lpt_cnext;
+ if (!cnode)
+ return 0;
+ cnt += 1;
+ while (1) {
+ ubifs_assert(!test_bit(COW_ZNODE, &cnode->flags));
+ __set_bit(COW_ZNODE, &cnode->flags);
+ cnext = next_dirty_cnode(cnode);
+ if (!cnext) {
+ cnode->cnext = c->lpt_cnext;
+ break;
+ }
+ cnode->cnext = cnext;
+ cnode = cnext;
+ cnt += 1;
+ }
+ dbg_cmt("committing %d cnodes", cnt);
+ dbg_lp("committing %d cnodes", cnt);
+ ubifs_assert(cnt == c->dirty_nn_cnt + c->dirty_pn_cnt);
+ return cnt;
+}
+
+/**
+ * upd_ltab - update LPT LEB properties.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number
+ * @free: amount of free space
+ * @dirty: amount of dirty space to add
+ */
+static void upd_ltab(struct ubifs_info *c, int lnum, int free, int dirty)
+{
+ dbg_lp("LEB %d free %d dirty %d to %d +%d",
+ lnum, c->ltab[lnum - c->lpt_first].free,
+ c->ltab[lnum - c->lpt_first].dirty, free, dirty);
+ ubifs_assert(lnum >= c->lpt_first && lnum <= c->lpt_last);
+ c->ltab[lnum - c->lpt_first].free = free;
+ c->ltab[lnum - c->lpt_first].dirty += dirty;
+}
+
+/**
+ * alloc_lpt_leb - allocate an LPT LEB that is empty.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number is passed and returned here
+ *
+ * This function finds the next empty LEB in the ltab starting from @lnum. If a
+ * an empty LEB is found it is returned in @lnum and the function returns %0.
+ * Otherwise the function returns -ENOSPC. Note however, that LPT is designed
+ * never to run out of space.
+ */
+static int alloc_lpt_leb(struct ubifs_info *c, int *lnum)
+{
+ int i, n;
+
+ n = *lnum - c->lpt_first + 1;
+ for (i = n; i < c->lpt_lebs; i++) {
+ if (c->ltab[i].tgc || c->ltab[i].cmt)
+ continue;
+ if (c->ltab[i].free == c->leb_size) {
+ c->ltab[i].cmt = 1;
+ *lnum = i + c->lpt_first;
+ return 0;
+ }
+ }
+
+ for (i = 0; i < n; i++) {
+ if (c->ltab[i].tgc || c->ltab[i].cmt)
+ continue;
+ if (c->ltab[i].free == c->leb_size) {
+ c->ltab[i].cmt = 1;
+ *lnum = i + c->lpt_first;
+ return 0;
+ }
+ }
+ dbg_err("last LEB %d", *lnum);
+ dump_stack();
+ return -ENOSPC;
+}
+
+/**
+ * layout_cnodes - layout cnodes for commit.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int layout_cnodes(struct ubifs_info *c)
+{
+ int lnum, offs, len, alen, done_lsave, done_ltab, err;
+ struct ubifs_cnode *cnode;
+
+ cnode = c->lpt_cnext;
+ if (!cnode)
+ return 0;
+ lnum = c->nhead_lnum;
+ offs = c->nhead_offs;
+ /* Try to place lsave and ltab nicely */
+ done_lsave = !c->big_lpt;
+ done_ltab = 0;
+ if (!done_lsave && offs + c->lsave_sz <= c->leb_size) {
+ done_lsave = 1;
+ c->lsave_lnum = lnum;
+ c->lsave_offs = offs;
+ offs += c->lsave_sz;
+ }
+
+ if (offs + c->ltab_sz <= c->leb_size) {
+ done_ltab = 1;
+ c->ltab_lnum = lnum;
+ c->ltab_offs = offs;
+ offs += c->ltab_sz;
+ }
+
+ do {
+ if (cnode->level) {
+ len = c->nnode_sz;
+ c->dirty_nn_cnt -= 1;
+ } else {
+ len = c->pnode_sz;
+ c->dirty_pn_cnt -= 1;
+ }
+ while (offs + len > c->leb_size) {
+ alen = ALIGN(offs, c->min_io_size);
+ upd_ltab(c, lnum, c->leb_size - alen, alen - offs);
+ err = alloc_lpt_leb(c, &lnum);
+ if (err)
+ return err;
+ offs = 0;
+ ubifs_assert(lnum >= c->lpt_first &&
+ lnum <= c->lpt_last);
+ /* Try to place lsave and ltab nicely */
+ if (!done_lsave) {
+ done_lsave = 1;
+ c->lsave_lnum = lnum;
+ c->lsave_offs = offs;
+ offs += c->lsave_sz;
+ continue;
+ }
+ if (!done_ltab) {
+ done_ltab = 1;
+ c->ltab_lnum = lnum;
+ c->ltab_offs = offs;
+ offs += c->ltab_sz;
+ continue;
+ }
+ break;
+ }
+ if (cnode->parent) {
+ cnode->parent->nbranch[cnode->iip].lnum = lnum;
+ cnode->parent->nbranch[cnode->iip].offs = offs;
+ } else {
+ c->lpt_lnum = lnum;
+ c->lpt_offs = offs;
+ }
+ offs += len;
+ cnode = cnode->cnext;
+ } while (cnode && cnode != c->lpt_cnext);
+
+ /* Make sure to place LPT's save table */
+ if (!done_lsave) {
+ if (offs + c->lsave_sz > c->leb_size) {
+ alen = ALIGN(offs, c->min_io_size);
+ upd_ltab(c, lnum, c->leb_size - alen, alen - offs);
+ err = alloc_lpt_leb(c, &lnum);
+ if (err)
+ return err;
+ offs = 0;
+ ubifs_assert(lnum >= c->lpt_first &&
+ lnum <= c->lpt_last);
+ }
+ done_lsave = 1;
+ c->lsave_lnum = lnum;
+ c->lsave_offs = offs;
+ offs += c->lsave_sz;
+ }
+
+ /* Make sure to place LPT's own lprops table */
+ if (!done_ltab) {
+ if (offs + c->ltab_sz > c->leb_size) {
+ alen = ALIGN(offs, c->min_io_size);
+ upd_ltab(c, lnum, c->leb_size - alen, alen - offs);
+ err = alloc_lpt_leb(c, &lnum);
+ if (err)
+ return err;
+ offs = 0;
+ ubifs_assert(lnum >= c->lpt_first &&
+ lnum <= c->lpt_last);
+ }
+ done_ltab = 1;
+ c->ltab_lnum = lnum;
+ c->ltab_offs = offs;
+ offs += c->ltab_sz;
+ }
+
+ alen = ALIGN(offs, c->min_io_size);
+ upd_ltab(c, lnum, c->leb_size - alen, alen - offs);
+ return 0;
+}
+
+/**
+ * realloc_lpt_leb - allocate an LPT LEB that is empty.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number is passed and returned here
+ *
+ * This function duplicates exactly the results of the function alloc_lpt_leb.
+ * It is used during end commit to reallocate the same LEB numbers that were
+ * allocated by alloc_lpt_leb during start commit.
+ *
+ * This function finds the next LEB that was allocated by the alloc_lpt_leb
+ * function starting from @lnum. If a LEB is found it is returned in @lnum and
+ * the function returns %0. Otherwise the function returns -ENOSPC.
+ * Note however, that LPT is designed never to run out of space.
+ */
+static int realloc_lpt_leb(struct ubifs_info *c, int *lnum)
+{
+ int i, n;
+
+ n = *lnum - c->lpt_first + 1;
+ for (i = n; i < c->lpt_lebs; i++)
+ if (c->ltab[i].cmt) {
+ c->ltab[i].cmt = 0;
+ *lnum = i + c->lpt_first;
+ return 0;
+ }
+
+ for (i = 0; i < n; i++)
+ if (c->ltab[i].cmt) {
+ c->ltab[i].cmt = 0;
+ *lnum = i + c->lpt_first;
+ return 0;
+ }
+ dbg_err("last LEB %d", *lnum);
+ dump_stack();
+ return -ENOSPC;
+}
+
+/**
+ * write_cnodes - write cnodes for commit.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int write_cnodes(struct ubifs_info *c)
+{
+ int lnum, offs, len, from, err, wlen, alen, done_ltab, done_lsave;
+ struct ubifs_cnode *cnode;
+ void *buf = c->lpt_buf;
+
+ cnode = c->lpt_cnext;
+ if (!cnode)
+ return 0;
+ lnum = c->nhead_lnum;
+ offs = c->nhead_offs;
+ from = offs;
+ /* Ensure empty LEB is unmapped */
+ if (offs == 0) {
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ }
+ /* Try to place lsave and ltab nicely */
+ done_lsave = !c->big_lpt;
+ done_ltab = 0;
+ if (!done_lsave && offs + c->lsave_sz <= c->leb_size) {
+ done_lsave = 1;
+ ubifs_pack_lsave(c, buf + offs, c->lsave);
+ offs += c->lsave_sz;
+ }
+
+ if (offs + c->ltab_sz <= c->leb_size) {
+ done_ltab = 1;
+ ubifs_pack_ltab(c, buf + offs, c->ltab_cmt);
+ offs += c->ltab_sz;
+ }
+
+ /* Loop for each cnode */
+ do {
+ if (cnode->level)
+ len = c->nnode_sz;
+ else
+ len = c->pnode_sz;
+ while (offs + len > c->leb_size) {
+ wlen = offs - from;
+ if (wlen) {
+ alen = ALIGN(wlen, c->min_io_size);
+ memset(buf + offs, 0xff, alen - wlen);
+ err = ubifs_leb_write(c, lnum, buf + from, from,
+ alen, UBI_SHORTTERM);
+ if (err)
+ return err;
+ }
+ err = realloc_lpt_leb(c, &lnum);
+ if (err)
+ return err;
+ offs = 0;
+ from = 0;
+ ubifs_assert(lnum >= c->lpt_first &&
+ lnum <= c->lpt_last);
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ /* Try to place lsave and ltab nicely */
+ if (!done_lsave) {
+ done_lsave = 1;
+ ubifs_pack_lsave(c, buf + offs, c->lsave);
+ offs += c->lsave_sz;
+ continue;
+ }
+ if (!done_ltab) {
+ done_ltab = 1;
+ ubifs_pack_ltab(c, buf + offs, c->ltab_cmt);
+ offs += c->ltab_sz;
+ continue;
+ }
+ break;
+ }
+ if (cnode->level)
+ ubifs_pack_nnode(c, buf + offs,
+ (struct ubifs_nnode *)cnode);
+ else
+ ubifs_pack_pnode(c, buf + offs,
+ (struct ubifs_pnode *)cnode);
+ /*
+ * The reason for the barriers is the same as in case of TNC.
+ * See comment in 'write_index()'. 'dirty_cow_nnode()' and
+ * 'dirty_cow_pnode()' are the functions for which this is
+ * important.
+ */
+ clear_bit(DIRTY_CNODE, &cnode->flags);
+ smp_mb__before_clear_bit();
+ clear_bit(COW_ZNODE, &cnode->flags);
+ smp_mb__after_clear_bit();
+ offs += len;
+ cnode = cnode->cnext;
+ } while (cnode && cnode != c->lpt_cnext);
+
+ /* Make sure to place LPT's save table */
+ if (!done_lsave) {
+ if (offs + c->lsave_sz > c->leb_size) {
+ wlen = offs - from;
+ alen = ALIGN(wlen, c->min_io_size);
+ memset(buf + offs, 0xff, alen - wlen);
+ err = ubifs_leb_write(c, lnum, buf + from, from, alen,
+ UBI_SHORTTERM);
+ if (err)
+ return err;
+ err = realloc_lpt_leb(c, &lnum);
+ if (err)
+ return err;
+ offs = 0;
+ ubifs_assert(lnum >= c->lpt_first &&
+ lnum <= c->lpt_last);
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ }
+ done_lsave = 1;
+ ubifs_pack_lsave(c, buf + offs, c->lsave);
+ offs += c->lsave_sz;
+ }
+
+ /* Make sure to place LPT's own lprops table */
+ if (!done_ltab) {
+ if (offs + c->ltab_sz > c->leb_size) {
+ wlen = offs - from;
+ alen = ALIGN(wlen, c->min_io_size);
+ memset(buf + offs, 0xff, alen - wlen);
+ err = ubifs_leb_write(c, lnum, buf + from, from, alen,
+ UBI_SHORTTERM);
+ if (err)
+ return err;
+ err = realloc_lpt_leb(c, &lnum);
+ if (err)
+ return err;
+ offs = 0;
+ ubifs_assert(lnum >= c->lpt_first &&
+ lnum <= c->lpt_last);
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ }
+ done_ltab = 1;
+ ubifs_pack_ltab(c, buf + offs, c->ltab_cmt);
+ offs += c->ltab_sz;
+ }
+
+ /* Write remaining data in buffer */
+ wlen = offs - from;
+ alen = ALIGN(wlen, c->min_io_size);
+ memset(buf + offs, 0xff, alen - wlen);
+ err = ubifs_leb_write(c, lnum, buf + from, from, alen, UBI_SHORTTERM);
+ if (err)
+ return err;
+ c->nhead_lnum = lnum;
+ c->nhead_offs = ALIGN(offs, c->min_io_size);
+
+ dbg_lp("LPT root is at %d:%d", c->lpt_lnum, c->lpt_offs);
+ dbg_lp("LPT head is at %d:%d", c->nhead_lnum, c->nhead_offs);
+ dbg_lp("LPT ltab is at %d:%d", c->ltab_lnum, c->ltab_offs);
+ if (c->big_lpt)
+ dbg_lp("LPT lsave is at %d:%d", c->lsave_lnum, c->lsave_offs);
+ return 0;
+}
+
+/**
+ * next_pnode - find next pnode.
+ * @c: UBIFS file-system description object
+ * @pnode: pnode
+ *
+ * This function returns the next pnode or %NULL if there are no more pnodes.
+ */
+static struct ubifs_pnode *next_pnode(struct ubifs_info *c,
+ struct ubifs_pnode *pnode)
+{
+ struct ubifs_nnode *nnode;
+ int iip;
+
+ /* Try to go right */
+ nnode = pnode->parent;
+ iip = pnode->iip + 1;
+ if (iip < UBIFS_LPT_FANOUT) {
+ /* We assume here that LEB zero is never an LPT LEB */
+ if (nnode->nbranch[iip].lnum)
+ return ubifs_get_pnode(c, nnode, iip);
+ else
+ return NULL;
+ }
+
+ /* Go up while can't go right */
+ do {
+ iip = nnode->iip + 1;
+ nnode = nnode->parent;
+ if (!nnode)
+ return NULL;
+ /* We assume here that LEB zero is never an LPT LEB */
+ } while (iip >= UBIFS_LPT_FANOUT || !nnode->nbranch[iip].lnum);
+
+ /* Go right */
+ nnode = ubifs_get_nnode(c, nnode, iip);
+ if (IS_ERR(nnode))
+ return (void *)nnode;
+
+ /* Go down to level 1 */
+ while (nnode->level > 1) {
+ nnode = ubifs_get_nnode(c, nnode, 0);
+ if (IS_ERR(nnode))
+ return (void *)nnode;
+ }
+
+ return ubifs_get_pnode(c, nnode, 0);
+}
+
+/**
+ * pnode_lookup - lookup a pnode in the LPT.
+ * @c: UBIFS file-system description object
+ * @i: pnode number (0 to main_lebs - 1)
+ *
+ * This function returns a pointer to the pnode on success or a negative
+ * error code on failure.
+ */
+static struct ubifs_pnode *pnode_lookup(struct ubifs_info *c, int i)
+{
+ int err, h, iip, shft;
+ struct ubifs_nnode *nnode;
+
+ if (!c->nroot) {
+ err = ubifs_read_nnode(c, NULL, 0);
+ if (err)
+ return ERR_PTR(err);
+ }
+ i <<= UBIFS_LPT_FANOUT_SHIFT;
+ nnode = c->nroot;
+ shft = c->lpt_hght * UBIFS_LPT_FANOUT_SHIFT;
+ for (h = 1; h < c->lpt_hght; h++) {
+ iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
+ shft -= UBIFS_LPT_FANOUT_SHIFT;
+ nnode = ubifs_get_nnode(c, nnode, iip);
+ if (IS_ERR(nnode))
+ return ERR_PTR(PTR_ERR(nnode));
+ }
+ iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
+ return ubifs_get_pnode(c, nnode, iip);
+}
+
+/**
+ * add_pnode_dirt - add dirty space to LPT LEB properties.
+ * @c: UBIFS file-system description object
+ * @pnode: pnode for which to add dirt
+ */
+static void add_pnode_dirt(struct ubifs_info *c, struct ubifs_pnode *pnode)
+{
+ ubifs_add_lpt_dirt(c, pnode->parent->nbranch[pnode->iip].lnum,
+ c->pnode_sz);
+}
+
+/**
+ * do_make_pnode_dirty - mark a pnode dirty.
+ * @c: UBIFS file-system description object
+ * @pnode: pnode to mark dirty
+ */
+static void do_make_pnode_dirty(struct ubifs_info *c, struct ubifs_pnode *pnode)
+{
+ /* Assumes cnext list is empty i.e. not called during commit */
+ if (!test_and_set_bit(DIRTY_CNODE, &pnode->flags)) {
+ struct ubifs_nnode *nnode;
+
+ c->dirty_pn_cnt += 1;
+ add_pnode_dirt(c, pnode);
+ /* Mark parent and ancestors dirty too */
+ nnode = pnode->parent;
+ while (nnode) {
+ if (!test_and_set_bit(DIRTY_CNODE, &nnode->flags)) {
+ c->dirty_nn_cnt += 1;
+ ubifs_add_nnode_dirt(c, nnode);
+ nnode = nnode->parent;
+ } else
+ break;
+ }
+ }
+}
+
+/**
+ * make_tree_dirty - mark the entire LEB properties tree dirty.
+ * @c: UBIFS file-system description object
+ *
+ * This function is used by the "small" LPT model to cause the entire LEB
+ * properties tree to be written. The "small" LPT model does not use LPT
+ * garbage collection because it is more efficient to write the entire tree
+ * (because it is small).
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int make_tree_dirty(struct ubifs_info *c)
+{
+ struct ubifs_pnode *pnode;
+
+ pnode = pnode_lookup(c, 0);
+ while (pnode) {
+ do_make_pnode_dirty(c, pnode);
+ pnode = next_pnode(c, pnode);
+ if (IS_ERR(pnode))
+ return PTR_ERR(pnode);
+ }
+ return 0;
+}
+
+/**
+ * need_write_all - determine if the LPT area is running out of free space.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns %1 if the LPT area is running out of free space and %0
+ * if it is not.
+ */
+static int need_write_all(struct ubifs_info *c)
+{
+ long long free = 0;
+ int i;
+
+ for (i = 0; i < c->lpt_lebs; i++) {
+ if (i + c->lpt_first == c->nhead_lnum)
+ free += c->leb_size - c->nhead_offs;
+ else if (c->ltab[i].free == c->leb_size)
+ free += c->leb_size;
+ else if (c->ltab[i].free + c->ltab[i].dirty == c->leb_size)
+ free += c->leb_size;
+ }
+ /* Less than twice the size left */
+ if (free <= c->lpt_sz * 2)
+ return 1;
+ return 0;
+}
+
+/**
+ * lpt_tgc_start - start trivial garbage collection of LPT LEBs.
+ * @c: UBIFS file-system description object
+ *
+ * LPT trivial garbage collection is where a LPT LEB contains only dirty and
+ * free space and so may be reused as soon as the next commit is completed.
+ * This function is called during start commit to mark LPT LEBs for trivial GC.
+ */
+static void lpt_tgc_start(struct ubifs_info *c)
+{
+ int i;
+
+ for (i = 0; i < c->lpt_lebs; i++) {
+ if (i + c->lpt_first == c->nhead_lnum)
+ continue;
+ if (c->ltab[i].dirty > 0 &&
+ c->ltab[i].free + c->ltab[i].dirty == c->leb_size) {
+ c->ltab[i].tgc = 1;
+ c->ltab[i].free = c->leb_size;
+ c->ltab[i].dirty = 0;
+ dbg_lp("LEB %d", i + c->lpt_first);
+ }
+ }
+}
+
+/**
+ * lpt_tgc_end - end trivial garbage collection of LPT LEBs.
+ * @c: UBIFS file-system description object
+ *
+ * LPT trivial garbage collection is where a LPT LEB contains only dirty and
+ * free space and so may be reused as soon as the next commit is completed.
+ * This function is called after the commit is completed (master node has been
+ * written) and unmaps LPT LEBs that were marked for trivial GC.
+ */
+static int lpt_tgc_end(struct ubifs_info *c)
+{
+ int i, err;
+
+ for (i = 0; i < c->lpt_lebs; i++)
+ if (c->ltab[i].tgc) {
+ err = ubifs_leb_unmap(c, i + c->lpt_first);
+ if (err)
+ return err;
+ c->ltab[i].tgc = 0;
+ dbg_lp("LEB %d", i + c->lpt_first);
+ }
+ return 0;
+}
+
+/**
+ * populate_lsave - fill the lsave array with important LEB numbers.
+ * @c: the UBIFS file-system description object
+ *
+ * This function is only called for the "big" model. It records a small number
+ * of LEB numbers of important LEBs. Important LEBs are ones that are (from
+ * most important to least important): empty, freeable, freeable index, dirty
+ * index, dirty or free. Upon mount, we read this list of LEB numbers and bring
+ * their pnodes into memory. That will stop us from having to scan the LPT
+ * straight away. For the "small" model we assume that scanning the LPT is no
+ * big deal.
+ */
+static void populate_lsave(struct ubifs_info *c)
+{
+ struct ubifs_lprops *lprops;
+ struct ubifs_lpt_heap *heap;
+ int i, cnt = 0;
+
+ ubifs_assert(c->big_lpt);
+ if (!(c->lpt_drty_flgs & LSAVE_DIRTY)) {
+ c->lpt_drty_flgs |= LSAVE_DIRTY;
+ ubifs_add_lpt_dirt(c, c->lsave_lnum, c->lsave_sz);
+ }
+ list_for_each_entry(lprops, &c->empty_list, list) {
+ c->lsave[cnt++] = lprops->lnum;
+ if (cnt >= c->lsave_cnt)
+ return;
+ }
+ list_for_each_entry(lprops, &c->freeable_list, list) {
+ c->lsave[cnt++] = lprops->lnum;
+ if (cnt >= c->lsave_cnt)
+ return;
+ }
+ list_for_each_entry(lprops, &c->frdi_idx_list, list) {
+ c->lsave[cnt++] = lprops->lnum;
+ if (cnt >= c->lsave_cnt)
+ return;
+ }
+ heap = &c->lpt_heap[LPROPS_DIRTY_IDX - 1];
+ for (i = 0; i < heap->cnt; i++) {
+ c->lsave[cnt++] = heap->arr[i]->lnum;
+ if (cnt >= c->lsave_cnt)
+ return;
+ }
+ heap = &c->lpt_heap[LPROPS_DIRTY - 1];
+ for (i = 0; i < heap->cnt; i++) {
+ c->lsave[cnt++] = heap->arr[i]->lnum;
+ if (cnt >= c->lsave_cnt)
+ return;
+ }
+ heap = &c->lpt_heap[LPROPS_FREE - 1];
+ for (i = 0; i < heap->cnt; i++) {
+ c->lsave[cnt++] = heap->arr[i]->lnum;
+ if (cnt >= c->lsave_cnt)
+ return;
+ }
+ /* Fill it up completely */
+ while (cnt < c->lsave_cnt)
+ c->lsave[cnt++] = c->main_first;
+}
+
+/**
+ * ubifs_lpt_start_commit - UBIFS commit starts.
+ * @c: the UBIFS file-system description object
+ *
+ * This function has to be called when UBIFS starts the commit operation.
+ * This function "freezes" all currently dirty LEB properties and does not
+ * change them anymore. Further changes are saved and tracked separately
+ * because they are not part of this commit. This function returns zero in case
+ * of success and a negative error code in case of failure.
+ */
+int ubifs_lpt_start_commit(struct ubifs_info *c)
+{
+ int err, cnt;
+
+ dbg_lp("");
+
+ mutex_lock(&c->lp_mutex);
+ err = dbg_check_ltab(c);
+ if (err)
+ goto out;
+
+ lpt_tgc_start(c);
+
+ if (!c->dirty_pn_cnt) {
+ dbg_cmt("no cnodes to commit");
+ err = 0;
+ goto out;
+ }
+
+ if (!c->big_lpt && need_write_all(c)) {
+ /* If needed, write everything */
+ err = make_tree_dirty(c);
+ if (err)
+ goto out;
+ lpt_tgc_start(c);
+ }
+
+ if (c->big_lpt)
+ populate_lsave(c);
+
+ cnt = get_cnodes_to_commit(c);
+ ubifs_assert(cnt != 0);
+
+ err = layout_cnodes(c);
+ if (err)
+ goto out;
+
+ /* Copy the LPT's own lprops for end commit to write */
+ memcpy(c->ltab_cmt, c->ltab,
+ sizeof(struct ubifs_lpt_lprops) * c->lpt_lebs);
+ c->lpt_drty_flgs &= ~(LTAB_DIRTY | LSAVE_DIRTY);
+
+out:
+ mutex_unlock(&c->lp_mutex);
+ return err;
+}
+
+/**
+ * free_obsolete_cnodes - free obsolete cnodes for commit end.
+ * @c: UBIFS file-system description object
+ */
+static void free_obsolete_cnodes(struct ubifs_info *c)
+{
+ struct ubifs_cnode *cnode, *cnext;
+
+ cnext = c->lpt_cnext;
+ if (!cnext)
+ return;
+ do {
+ cnode = cnext;
+ cnext = cnode->cnext;
+ if (test_bit(OBSOLETE_CNODE, &cnode->flags))
+ kfree(cnode);
+ else
+ cnode->cnext = NULL;
+ } while (cnext != c->lpt_cnext);
+ c->lpt_cnext = NULL;
+}
+
+/**
+ * ubifs_lpt_end_commit - finish the commit operation.
+ * @c: the UBIFS file-system description object
+ *
+ * This function has to be called when the commit operation finishes. It
+ * flushes the changes which were "frozen" by 'ubifs_lprops_start_commit()' to
+ * the media. Returns zero in case of success and a negative error code in case
+ * of failure.
+ */
+int ubifs_lpt_end_commit(struct ubifs_info *c)
+{
+ int err;
+
+ dbg_lp("");
+
+ if (!c->lpt_cnext)
+ return 0;
+
+ err = write_cnodes(c);
+ if (err)
+ return err;
+
+ mutex_lock(&c->lp_mutex);
+ free_obsolete_cnodes(c);
+ mutex_unlock(&c->lp_mutex);
+
+ return 0;
+}
+
+/**
+ * nnode_lookup - lookup a nnode in the LPT.
+ * @c: UBIFS file-system description object
+ * @i: nnode number
+ *
+ * This function returns a pointer to the nnode on success or a negative
+ * error code on failure.
+ */
+static struct ubifs_nnode *nnode_lookup(struct ubifs_info *c, int i)
+{
+ int err, iip;
+ struct ubifs_nnode *nnode;
+
+ if (!c->nroot) {
+ err = ubifs_read_nnode(c, NULL, 0);
+ if (err)
+ return ERR_PTR(err);
+ }
+ nnode = c->nroot;
+ while (1) {
+ iip = i & (UBIFS_LPT_FANOUT - 1);
+ i >>= UBIFS_LPT_FANOUT_SHIFT;
+ if (!i)
+ break;
+ nnode = ubifs_get_nnode(c, nnode, iip);
+ if (IS_ERR(nnode))
+ return nnode;
+ }
+ return nnode;
+}
+
+/**
+ * make_nnode_dirty - find a nnode and, if found, make it dirty.
+ * @c: UBIFS file-system description object
+ * @node_num: nnode number of nnode to make dirty
+ * @lnum: LEB number where nnode was written
+ * @offs: offset where nnode was written
+ *
+ * This function is used by LPT garbage collection. LPT garbage collection is
+ * used only for the "big" LPT model (c->big_lpt == 1). Garbage collection
+ * simply involves marking all the nodes in the LEB being garbage-collected as
+ * dirty. The dirty nodes are written next commit, after which the LEB is free
+ * to be reused.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int make_nnode_dirty(struct ubifs_info *c, int node_num, int lnum,
+ int offs)
+{
+ struct ubifs_nnode *nnode;
+
+ nnode = nnode_lookup(c, node_num);
+ if (IS_ERR(nnode))
+ return PTR_ERR(nnode);
+ if (nnode->parent) {
+ struct ubifs_nbranch *branch;
+
+ branch = &nnode->parent->nbranch[nnode->iip];
+ if (branch->lnum != lnum || branch->offs != offs)
+ return 0; /* nnode is obsolete */
+ } else if (c->lpt_lnum != lnum || c->lpt_offs != offs)
+ return 0; /* nnode is obsolete */
+ /* Assumes cnext list is empty i.e. not called during commit */
+ if (!test_and_set_bit(DIRTY_CNODE, &nnode->flags)) {
+ c->dirty_nn_cnt += 1;
+ ubifs_add_nnode_dirt(c, nnode);
+ /* Mark parent and ancestors dirty too */
+ nnode = nnode->parent;
+ while (nnode) {
+ if (!test_and_set_bit(DIRTY_CNODE, &nnode->flags)) {
+ c->dirty_nn_cnt += 1;
+ ubifs_add_nnode_dirt(c, nnode);
+ nnode = nnode->parent;
+ } else
+ break;
+ }
+ }
+ return 0;
+}
+
+/**
+ * make_pnode_dirty - find a pnode and, if found, make it dirty.
+ * @c: UBIFS file-system description object
+ * @node_num: pnode number of pnode to make dirty
+ * @lnum: LEB number where pnode was written
+ * @offs: offset where pnode was written
+ *
+ * This function is used by LPT garbage collection. LPT garbage collection is
+ * used only for the "big" LPT model (c->big_lpt == 1). Garbage collection
+ * simply involves marking all the nodes in the LEB being garbage-collected as
+ * dirty. The dirty nodes are written next commit, after which the LEB is free
+ * to be reused.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int make_pnode_dirty(struct ubifs_info *c, int node_num, int lnum,
+ int offs)
+{
+ struct ubifs_pnode *pnode;
+ struct ubifs_nbranch *branch;
+
+ pnode = pnode_lookup(c, node_num);
+ if (IS_ERR(pnode))
+ return PTR_ERR(pnode);
+ branch = &pnode->parent->nbranch[pnode->iip];
+ if (branch->lnum != lnum || branch->offs != offs)
+ return 0;
+ do_make_pnode_dirty(c, pnode);
+ return 0;
+}
+
+/**
+ * make_ltab_dirty - make ltab node dirty.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number where ltab was written
+ * @offs: offset where ltab was written
+ *
+ * This function is used by LPT garbage collection. LPT garbage collection is
+ * used only for the "big" LPT model (c->big_lpt == 1). Garbage collection
+ * simply involves marking all the nodes in the LEB being garbage-collected as
+ * dirty. The dirty nodes are written next commit, after which the LEB is free
+ * to be reused.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int make_ltab_dirty(struct ubifs_info *c, int lnum, int offs)
+{
+ if (lnum != c->ltab_lnum || offs != c->ltab_offs)
+ return 0; /* This ltab node is obsolete */
+ if (!(c->lpt_drty_flgs & LTAB_DIRTY)) {
+ c->lpt_drty_flgs |= LTAB_DIRTY;
+ ubifs_add_lpt_dirt(c, c->ltab_lnum, c->ltab_sz);
+ }
+ return 0;
+}
+
+/**
+ * make_lsave_dirty - make lsave node dirty.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number where lsave was written
+ * @offs: offset where lsave was written
+ *
+ * This function is used by LPT garbage collection. LPT garbage collection is
+ * used only for the "big" LPT model (c->big_lpt == 1). Garbage collection
+ * simply involves marking all the nodes in the LEB being garbage-collected as
+ * dirty. The dirty nodes are written next commit, after which the LEB is free
+ * to be reused.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int make_lsave_dirty(struct ubifs_info *c, int lnum, int offs)
+{
+ if (lnum != c->lsave_lnum || offs != c->lsave_offs)
+ return 0; /* This lsave node is obsolete */
+ if (!(c->lpt_drty_flgs & LSAVE_DIRTY)) {
+ c->lpt_drty_flgs |= LSAVE_DIRTY;
+ ubifs_add_lpt_dirt(c, c->lsave_lnum, c->lsave_sz);
+ }
+ return 0;
+}
+
+/**
+ * make_node_dirty - make node dirty.
+ * @c: UBIFS file-system description object
+ * @node_type: LPT node type
+ * @node_num: node number
+ * @lnum: LEB number where node was written
+ * @offs: offset where node was written
+ *
+ * This function is used by LPT garbage collection. LPT garbage collection is
+ * used only for the "big" LPT model (c->big_lpt == 1). Garbage collection
+ * simply involves marking all the nodes in the LEB being garbage-collected as
+ * dirty. The dirty nodes are written next commit, after which the LEB is free
+ * to be reused.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int make_node_dirty(struct ubifs_info *c, int node_type, int node_num,
+ int lnum, int offs)
+{
+ switch (node_type) {
+ case UBIFS_LPT_NNODE:
+ return make_nnode_dirty(c, node_num, lnum, offs);
+ case UBIFS_LPT_PNODE:
+ return make_pnode_dirty(c, node_num, lnum, offs);
+ case UBIFS_LPT_LTAB:
+ return make_ltab_dirty(c, lnum, offs);
+ case UBIFS_LPT_LSAVE:
+ return make_lsave_dirty(c, lnum, offs);
+ }
+ return -EINVAL;
+}
+
+/**
+ * get_lpt_node_len - return the length of a node based on its type.
+ * @c: UBIFS file-system description object
+ * @node_type: LPT node type
+ */
+static int get_lpt_node_len(struct ubifs_info *c, int node_type)
+{
+ switch (node_type) {
+ case UBIFS_LPT_NNODE:
+ return c->nnode_sz;
+ case UBIFS_LPT_PNODE:
+ return c->pnode_sz;
+ case UBIFS_LPT_LTAB:
+ return c->ltab_sz;
+ case UBIFS_LPT_LSAVE:
+ return c->lsave_sz;
+ }
+ return 0;
+}
+
+/**
+ * get_pad_len - return the length of padding in a buffer.
+ * @c: UBIFS file-system description object
+ * @buf: buffer
+ * @len: length of buffer
+ */
+static int get_pad_len(struct ubifs_info *c, uint8_t *buf, int len)
+{
+ int offs, pad_len;
+
+ if (c->min_io_size == 1)
+ return 0;
+ offs = c->leb_size - len;
+ pad_len = ALIGN(offs, c->min_io_size) - offs;
+ return pad_len;
+}
+
+/**
+ * get_lpt_node_type - return type (and node number) of a node in a buffer.
+ * @c: UBIFS file-system description object
+ * @buf: buffer
+ * @node_num: node number is returned here
+ */
+static int get_lpt_node_type(struct ubifs_info *c, uint8_t *buf, int *node_num)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int pos = 0, node_type;
+
+ node_type = ubifs_unpack_bits(&addr, &pos, UBIFS_LPT_TYPE_BITS);
+ *node_num = ubifs_unpack_bits(&addr, &pos, c->pcnt_bits);
+ return node_type;
+}
+
+/**
+ * is_a_node - determine if a buffer contains a node.
+ * @c: UBIFS file-system description object
+ * @buf: buffer
+ * @len: length of buffer
+ *
+ * This function returns %1 if the buffer contains a node or %0 if it does not.
+ */
+static int is_a_node(struct ubifs_info *c, uint8_t *buf, int len)
+{
+ uint8_t *addr = buf + UBIFS_LPT_CRC_BYTES;
+ int pos = 0, node_type, node_len;
+ uint16_t crc, calc_crc;
+
+ node_type = ubifs_unpack_bits(&addr, &pos, UBIFS_LPT_TYPE_BITS);
+ if (node_type == UBIFS_LPT_NOT_A_NODE)
+ return 0;
+ node_len = get_lpt_node_len(c, node_type);
+ if (!node_len || node_len > len)
+ return 0;
+ pos = 0;
+ addr = buf;
+ crc = ubifs_unpack_bits(&addr, &pos, UBIFS_LPT_CRC_BITS);
+ calc_crc = crc16(-1, buf + UBIFS_LPT_CRC_BYTES,
+ node_len - UBIFS_LPT_CRC_BYTES);
+ if (crc != calc_crc)
+ return 0;
+ return 1;
+}
+
+
+/**
+ * lpt_gc_lnum - garbage collect a LPT LEB.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number to garbage collect
+ *
+ * LPT garbage collection is used only for the "big" LPT model
+ * (c->big_lpt == 1). Garbage collection simply involves marking all the nodes
+ * in the LEB being garbage-collected as dirty. The dirty nodes are written
+ * next commit, after which the LEB is free to be reused.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int lpt_gc_lnum(struct ubifs_info *c, int lnum)
+{
+ int err, len = c->leb_size, node_type, node_num, node_len, offs;
+ void *buf = c->lpt_buf;
+
+ dbg_lp("LEB %d", lnum);
+ err = ubi_read(c->ubi, lnum, buf, 0, c->leb_size);
+ if (err) {
+ ubifs_err("cannot read LEB %d, error %d", lnum, err);
+ return err;
+ }
+ while (1) {
+ if (!is_a_node(c, buf, len)) {
+ int pad_len;
+
+ pad_len = get_pad_len(c, buf, len);
+ if (pad_len) {
+ buf += pad_len;
+ len -= pad_len;
+ continue;
+ }
+ return 0;
+ }
+ node_type = get_lpt_node_type(c, buf, &node_num);
+ node_len = get_lpt_node_len(c, node_type);
+ offs = c->leb_size - len;
+ ubifs_assert(node_len != 0);
+ mutex_lock(&c->lp_mutex);
+ err = make_node_dirty(c, node_type, node_num, lnum, offs);
+ mutex_unlock(&c->lp_mutex);
+ if (err)
+ return err;
+ buf += node_len;
+ len -= node_len;
+ }
+ return 0;
+}
+
+/**
+ * lpt_gc - LPT garbage collection.
+ * @c: UBIFS file-system description object
+ *
+ * Select a LPT LEB for LPT garbage collection and call 'lpt_gc_lnum()'.
+ * Returns %0 on success and a negative error code on failure.
+ */
+static int lpt_gc(struct ubifs_info *c)
+{
+ int i, lnum = -1, dirty = 0;
+
+ mutex_lock(&c->lp_mutex);
+ for (i = 0; i < c->lpt_lebs; i++) {
+ ubifs_assert(!c->ltab[i].tgc);
+ if (i + c->lpt_first == c->nhead_lnum ||
+ c->ltab[i].free + c->ltab[i].dirty == c->leb_size)
+ continue;
+ if (c->ltab[i].dirty > dirty) {
+ dirty = c->ltab[i].dirty;
+ lnum = i + c->lpt_first;
+ }
+ }
+ mutex_unlock(&c->lp_mutex);
+ if (lnum == -1)
+ return -ENOSPC;
+ return lpt_gc_lnum(c, lnum);
+}
+
+/**
+ * ubifs_lpt_post_commit - post commit LPT trivial GC and LPT GC.
+ * @c: UBIFS file-system description object
+ *
+ * LPT trivial GC is completed after a commit. Also LPT GC is done after a
+ * commit for the "big" LPT model.
+ */
+int ubifs_lpt_post_commit(struct ubifs_info *c)
+{
+ int err;
+
+ mutex_lock(&c->lp_mutex);
+ err = lpt_tgc_end(c);
+ if (err)
+ goto out;
+ if (c->big_lpt)
+ while (need_write_all(c)) {
+ mutex_unlock(&c->lp_mutex);
+ err = lpt_gc(c);
+ if (err)
+ return err;
+ mutex_lock(&c->lp_mutex);
+ }
+out:
+ mutex_unlock(&c->lp_mutex);
+ return err;
+}
+
+/**
+ * first_nnode - find the first nnode in memory.
+ * @c: UBIFS file-system description object
+ * @hght: height of tree where nnode found is returned here
+ *
+ * This function returns a pointer to the nnode found or %NULL if no nnode is
+ * found. This function is a helper to 'ubifs_lpt_free()'.
+ */
+static struct ubifs_nnode *first_nnode(struct ubifs_info *c, int *hght)
+{
+ struct ubifs_nnode *nnode;
+ int h, i, found;
+
+ nnode = c->nroot;
+ *hght = 0;
+ if (!nnode)
+ return NULL;
+ for (h = 1; h < c->lpt_hght; h++) {
+ found = 0;
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ if (nnode->nbranch[i].nnode) {
+ found = 1;
+ nnode = nnode->nbranch[i].nnode;
+ *hght = h;
+ break;
+ }
+ }
+ if (!found)
+ break;
+ }
+ return nnode;
+}
+
+/**
+ * next_nnode - find the next nnode in memory.
+ * @c: UBIFS file-system description object
+ * @nnode: nnode from which to start.
+ * @hght: height of tree where nnode is, is passed and returned here
+ *
+ * This function returns a pointer to the nnode found or %NULL if no nnode is
+ * found. This function is a helper to 'ubifs_lpt_free()'.
+ */
+static struct ubifs_nnode *next_nnode(struct ubifs_info *c,
+ struct ubifs_nnode *nnode, int *hght)
+{
+ struct ubifs_nnode *parent;
+ int iip, h, i, found;
+
+ parent = nnode->parent;
+ if (!parent)
+ return NULL;
+ if (nnode->iip == UBIFS_LPT_FANOUT - 1) {
+ *hght -= 1;
+ return parent;
+ }
+ for (iip = nnode->iip + 1; iip < UBIFS_LPT_FANOUT; iip++) {
+ nnode = parent->nbranch[iip].nnode;
+ if (nnode)
+ break;
+ }
+ if (!nnode) {
+ *hght -= 1;
+ return parent;
+ }
+ for (h = *hght + 1; h < c->lpt_hght; h++) {
+ found = 0;
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++) {
+ if (nnode->nbranch[i].nnode) {
+ found = 1;
+ nnode = nnode->nbranch[i].nnode;
+ *hght = h;
+ break;
+ }
+ }
+ if (!found)
+ break;
+ }
+ return nnode;
+}
+
+/**
+ * ubifs_lpt_free - free resources owned by the LPT.
+ * @c: UBIFS file-system description object
+ * @wr_only: free only resources used for writing
+ */
+void ubifs_lpt_free(struct ubifs_info *c, int wr_only)
+{
+ struct ubifs_nnode *nnode;
+ int i, hght;
+
+ /* Free write-only things first */
+
+ free_obsolete_cnodes(c); /* Leftover from a failed commit */
+
+ vfree(c->ltab_cmt);
+ c->ltab_cmt = NULL;
+ vfree(c->lpt_buf);
+ c->lpt_buf = NULL;
+ kfree(c->lsave);
+ c->lsave = NULL;
+
+ if (wr_only)
+ return;
+
+ /* Now free the rest */
+
+ nnode = first_nnode(c, &hght);
+ while (nnode) {
+ for (i = 0; i < UBIFS_LPT_FANOUT; i++)
+ kfree(nnode->nbranch[i].nnode);
+ nnode = next_nnode(c, nnode, &hght);
+ }
+ for (i = 0; i < LPROPS_HEAP_CNT; i++)
+ kfree(c->lpt_heap[i].arr);
+ kfree(c->dirty_idx.arr);
+ kfree(c->nroot);
+ vfree(c->ltab);
+ kfree(c->lpt_nod_buf);
+}
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+
+/**
+ * dbg_is_all_ff - determine if a buffer contains only 0xff bytes.
+ * @buf: buffer
+ * @len: buffer length
+ */
+static int dbg_is_all_ff(uint8_t *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ if (buf[i] != 0xff)
+ return 0;
+ return 1;
+}
+
+/**
+ * dbg_is_nnode_dirty - determine if a nnode is dirty.
+ * @c: the UBIFS file-system description object
+ * @lnum: LEB number where nnode was written
+ * @offs: offset where nnode was written
+ */
+static int dbg_is_nnode_dirty(struct ubifs_info *c, int lnum, int offs)
+{
+ struct ubifs_nnode *nnode;
+ int hght;
+
+ /* Entire tree is in memory so first_nnode / next_nnode are ok */
+ nnode = first_nnode(c, &hght);
+ for (; nnode; nnode = next_nnode(c, nnode, &hght)) {
+ struct ubifs_nbranch *branch;
+
+ cond_resched();
+ if (nnode->parent) {
+ branch = &nnode->parent->nbranch[nnode->iip];
+ if (branch->lnum != lnum || branch->offs != offs)
+ continue;
+ if (test_bit(DIRTY_CNODE, &nnode->flags))
+ return 1;
+ return 0;
+ } else {
+ if (c->lpt_lnum != lnum || c->lpt_offs != offs)
+ continue;
+ if (test_bit(DIRTY_CNODE, &nnode->flags))
+ return 1;
+ return 0;
+ }
+ }
+ return 1;
+}
+
+/**
+ * dbg_is_pnode_dirty - determine if a pnode is dirty.
+ * @c: the UBIFS file-system description object
+ * @lnum: LEB number where pnode was written
+ * @offs: offset where pnode was written
+ */
+static int dbg_is_pnode_dirty(struct ubifs_info *c, int lnum, int offs)
+{
+ int i, cnt;
+
+ cnt = DIV_ROUND_UP(c->main_lebs, UBIFS_LPT_FANOUT);
+ for (i = 0; i < cnt; i++) {
+ struct ubifs_pnode *pnode;
+ struct ubifs_nbranch *branch;
+
+ cond_resched();
+ pnode = pnode_lookup(c, i);
+ if (IS_ERR(pnode))
+ return PTR_ERR(pnode);
+ branch = &pnode->parent->nbranch[pnode->iip];
+ if (branch->lnum != lnum || branch->offs != offs)
+ continue;
+ if (test_bit(DIRTY_CNODE, &pnode->flags))
+ return 1;
+ return 0;
+ }
+ return 1;
+}
+
+/**
+ * dbg_is_ltab_dirty - determine if a ltab node is dirty.
+ * @c: the UBIFS file-system description object
+ * @lnum: LEB number where ltab node was written
+ * @offs: offset where ltab node was written
+ */
+static int dbg_is_ltab_dirty(struct ubifs_info *c, int lnum, int offs)
+{
+ if (lnum != c->ltab_lnum || offs != c->ltab_offs)
+ return 1;
+ return (c->lpt_drty_flgs & LTAB_DIRTY) != 0;
+}
+
+/**
+ * dbg_is_lsave_dirty - determine if a lsave node is dirty.
+ * @c: the UBIFS file-system description object
+ * @lnum: LEB number where lsave node was written
+ * @offs: offset where lsave node was written
+ */
+static int dbg_is_lsave_dirty(struct ubifs_info *c, int lnum, int offs)
+{
+ if (lnum != c->lsave_lnum || offs != c->lsave_offs)
+ return 1;
+ return (c->lpt_drty_flgs & LSAVE_DIRTY) != 0;
+}
+
+/**
+ * dbg_is_node_dirty - determine if a node is dirty.
+ * @c: the UBIFS file-system description object
+ * @node_type: node type
+ * @lnum: LEB number where node was written
+ * @offs: offset where node was written
+ */
+static int dbg_is_node_dirty(struct ubifs_info *c, int node_type, int lnum,
+ int offs)
+{
+ switch (node_type) {
+ case UBIFS_LPT_NNODE:
+ return dbg_is_nnode_dirty(c, lnum, offs);
+ case UBIFS_LPT_PNODE:
+ return dbg_is_pnode_dirty(c, lnum, offs);
+ case UBIFS_LPT_LTAB:
+ return dbg_is_ltab_dirty(c, lnum, offs);
+ case UBIFS_LPT_LSAVE:
+ return dbg_is_lsave_dirty(c, lnum, offs);
+ }
+ return 1;
+}
+
+/**
+ * dbg_check_ltab_lnum - check the ltab for a LPT LEB number.
+ * @c: the UBIFS file-system description object
+ * @lnum: LEB number where node was written
+ * @offs: offset where node was written
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int dbg_check_ltab_lnum(struct ubifs_info *c, int lnum)
+{
+ int err, len = c->leb_size, dirty = 0, node_type, node_num, node_len;
+ int ret;
+ void *buf = c->dbg_buf;
+
+ dbg_lp("LEB %d", lnum);
+ err = ubi_read(c->ubi, lnum, buf, 0, c->leb_size);
+ if (err) {
+ dbg_msg("ubi_read failed, LEB %d, error %d", lnum, err);
+ return err;
+ }
+ while (1) {
+ if (!is_a_node(c, buf, len)) {
+ int i, pad_len;
+
+ pad_len = get_pad_len(c, buf, len);
+ if (pad_len) {
+ buf += pad_len;
+ len -= pad_len;
+ dirty += pad_len;
+ continue;
+ }
+ if (!dbg_is_all_ff(buf, len)) {
+ dbg_msg("invalid empty space in LEB %d at %d",
+ lnum, c->leb_size - len);
+ err = -EINVAL;
+ }
+ i = lnum - c->lpt_first;
+ if (len != c->ltab[i].free) {
+ dbg_msg("invalid free space in LEB %d "
+ "(free %d, expected %d)",
+ lnum, len, c->ltab[i].free);
+ err = -EINVAL;
+ }
+ if (dirty != c->ltab[i].dirty) {
+ dbg_msg("invalid dirty space in LEB %d "
+ "(dirty %d, expected %d)",
+ lnum, dirty, c->ltab[i].dirty);
+ err = -EINVAL;
+ }
+ return err;
+ }
+ node_type = get_lpt_node_type(c, buf, &node_num);
+ node_len = get_lpt_node_len(c, node_type);
+ ret = dbg_is_node_dirty(c, node_type, lnum, c->leb_size - len);
+ if (ret == 1)
+ dirty += node_len;
+ buf += node_len;
+ len -= node_len;
+ }
+}
+
+/**
+ * dbg_check_ltab - check the free and dirty space in the ltab.
+ * @c: the UBIFS file-system description object
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int dbg_check_ltab(struct ubifs_info *c)
+{
+ int lnum, err, i, cnt;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_LPROPS))
+ return 0;
+
+ /* Bring the entire tree into memory */
+ cnt = DIV_ROUND_UP(c->main_lebs, UBIFS_LPT_FANOUT);
+ for (i = 0; i < cnt; i++) {
+ struct ubifs_pnode *pnode;
+
+ pnode = pnode_lookup(c, i);
+ if (IS_ERR(pnode))
+ return PTR_ERR(pnode);
+ cond_resched();
+ }
+
+ /* Check nodes */
+ err = dbg_check_lpt_nodes(c, (struct ubifs_cnode *)c->nroot, 0, 0);
+ if (err)
+ return err;
+
+ /* Check each LEB */
+ for (lnum = c->lpt_first; lnum <= c->lpt_last; lnum++) {
+ err = dbg_check_ltab_lnum(c, lnum);
+ if (err) {
+ dbg_err("failed at LEB %d", lnum);
+ return err;
+ }
+ }
+
+ dbg_lp("succeeded");
+ return 0;
+}
+
+#endif /* CONFIG_UBIFS_FS_DEBUG */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/Makefile avr32-2.6/fs/ubifs/Makefile
--- linux-2.6.25.6/fs/ubifs/Makefile 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/Makefile 2008-06-12 15:09:45.311815896 +0200
@@ -0,0 +1,9 @@
+obj-$(CONFIG_UBIFS_FS) += ubifs.o
+
+ubifs-y += shrinker.o journal.o file.o dir.o super.o sb.o io.o
+ubifs-y += tnc.o master.o scan.o replay.o log.o commit.o gc.o orphan.o
+ubifs-y += budget.o find.o tnc_commit.o compress.o lpt.o lprops.o
+ubifs-y += recovery.o ioctl.o lpt_commit.o tnc_misc.o
+
+ubifs-$(CONFIG_UBIFS_FS_DEBUG) += debug.o
+ubifs-$(CONFIG_UBIFS_FS_XATTR) += xattr.o
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/master.c avr32-2.6/fs/ubifs/master.c
--- linux-2.6.25.6/fs/ubifs/master.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/master.c 2008-06-12 15:09:45.475816115 +0200
@@ -0,0 +1,387 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/* This file implements reading and writing the master node */
+
+#include "ubifs.h"
+
+/**
+ * scan_for_master - search the valid master node.
+ * @c: UBIFS file-system description object
+ *
+ * This function scans the master node LEBs and search for the latest master
+ * node. Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+static int scan_for_master(struct ubifs_info *c)
+{
+ struct ubifs_scan_leb *sleb;
+ struct ubifs_scan_node *snod;
+ int lnum, offs = 0, nodes_cnt;
+
+ lnum = UBIFS_MST_LNUM;
+
+ sleb = ubifs_scan(c, lnum, 0, c->sbuf);
+ if (IS_ERR(sleb))
+ return PTR_ERR(sleb);
+ nodes_cnt = sleb->nodes_cnt;
+ if (nodes_cnt > 0) {
+ snod = list_entry(sleb->nodes.prev, struct ubifs_scan_node,
+ list);
+ if (snod->type != UBIFS_MST_NODE)
+ goto out;
+ memcpy(c->mst_node, snod->node, snod->len);
+ offs = snod->offs;
+ }
+ ubifs_scan_destroy(sleb);
+
+ lnum += 1;
+
+ sleb = ubifs_scan(c, lnum, 0, c->sbuf);
+ if (IS_ERR(sleb))
+ return PTR_ERR(sleb);
+ if (sleb->nodes_cnt != nodes_cnt)
+ goto out;
+ if (!sleb->nodes_cnt)
+ goto out;
+ snod = list_entry(sleb->nodes.prev, struct ubifs_scan_node, list);
+ if (snod->type != UBIFS_MST_NODE)
+ goto out;
+ if (snod->offs != offs)
+ goto out;
+ if (memcmp((void *)c->mst_node + UBIFS_CH_SZ,
+ (void *)snod->node + UBIFS_CH_SZ,
+ UBIFS_MST_NODE_SZ - UBIFS_CH_SZ))
+ goto out;
+ c->mst_offs = offs;
+ ubifs_scan_destroy(sleb);
+ return 0;
+
+out:
+ ubifs_scan_destroy(sleb);
+ return -EINVAL;
+}
+
+/**
+ * validate_master - validate master node.
+ * @c: UBIFS file-system description object
+ *
+ * This function validates data which was read from master node. Returns zero
+ * if the data is all right and %-EINVAL if not.
+ */
+static int validate_master(const struct ubifs_info *c)
+{
+ unsigned long long main_sz;
+ int err;
+
+ if (c->max_sqnum >= SQNUM_WATERMARK) {
+ err = 1;
+ goto out;
+ }
+
+ if (c->cmt_no >= c->max_sqnum) {
+ err = 2;
+ goto out;
+ }
+
+ if (c->highest_inum >= INUM_WATERMARK) {
+ err = 3;
+ goto out;
+ }
+
+ if (c->lhead_lnum < UBIFS_LOG_LNUM ||
+ c->lhead_lnum >= UBIFS_LOG_LNUM + c->log_lebs ||
+ c->lhead_offs < 0 || c->lhead_offs >= c->leb_size ||
+ c->lhead_offs & (c->min_io_size - 1)) {
+ err = 4;
+ goto out;
+ }
+
+ if (c->zroot.lnum >= c->leb_cnt || c->zroot.lnum < c->main_first ||
+ c->zroot.offs >= c->leb_size || c->zroot.offs & 7) {
+ err = 5;
+ goto out;
+ }
+
+ if (c->zroot.len < c->ranges[UBIFS_IDX_NODE].min_len ||
+ c->zroot.len > c->ranges[UBIFS_IDX_NODE].max_len) {
+ err = 6;
+ goto out;
+ }
+
+ if (c->gc_lnum >= c->leb_cnt || c->gc_lnum < c->main_first) {
+ err = 7;
+ goto out;
+ }
+
+ if (c->ihead_lnum >= c->leb_cnt || c->ihead_lnum < c->main_first ||
+ c->ihead_offs % c->min_io_size || c->ihead_offs < 0 ||
+ c->ihead_offs > c->leb_size || c->ihead_offs & 7) {
+ err = 8;
+ goto out;
+ }
+
+ main_sz = c->main_lebs * (unsigned long long)c->leb_size;
+ if (c->old_idx_sz & 7 || c->old_idx_sz >= main_sz) {
+ err = 9;
+ goto out;
+ }
+
+ if (c->lpt_lnum < c->lpt_first || c->lpt_lnum > c->lpt_last ||
+ c->lpt_offs < 0 || c->lpt_offs + c->nnode_sz > c->leb_size) {
+ err = 10;
+ goto out;
+ }
+
+ if (c->nhead_lnum < c->lpt_first || c->nhead_lnum > c->lpt_last ||
+ c->nhead_offs < 0 || c->nhead_offs % c->min_io_size ||
+ c->nhead_offs > c->leb_size) {
+ err = 11;
+ goto out;
+ }
+
+ if (c->ltab_lnum < c->lpt_first || c->ltab_lnum > c->lpt_last ||
+ c->ltab_offs < 0 ||
+ c->ltab_offs + c->ltab_sz > c->leb_size) {
+ err = 12;
+ goto out;
+ }
+
+ if (c->big_lpt && (c->lsave_lnum < c->lpt_first ||
+ c->lsave_lnum > c->lpt_last || c->lsave_offs < 0 ||
+ c->lsave_offs + c->lsave_sz > c->leb_size)) {
+ err = 13;
+ goto out;
+ }
+
+ if (c->lscan_lnum < c->main_first || c->lscan_lnum >= c->leb_cnt) {
+ err = 14;
+ goto out;
+ }
+
+ if (c->lst.empty_lebs < 0 || c->lst.empty_lebs > c->main_lebs - 2) {
+ err = 15;
+ goto out;
+ }
+
+ if (c->lst.idx_lebs < 0 || c->lst.idx_lebs > c->main_lebs - 1) {
+ err = 16;
+ goto out;
+ }
+
+ if (c->lst.total_free < 0 || c->lst.total_free > main_sz ||
+ c->lst.total_free & 7) {
+ err = 17;
+ goto out;
+ }
+
+ if (c->lst.total_dirty < 0 || (c->lst.total_dirty & 7)) {
+ err = 18;
+ goto out;
+ }
+
+ if (c->lst.total_used < 0 || (c->lst.total_used & 7)) {
+ err = 19;
+ goto out;
+ }
+
+ if (c->lst.total_free + c->lst.total_dirty +
+ c->lst.total_used > main_sz) {
+ err = 20;
+ goto out;
+ }
+
+ if (c->lst.total_dead + c->lst.total_dark +
+ c->lst.total_used + c->old_idx_sz > main_sz) {
+ err = 21;
+ goto out;
+ }
+
+ if (c->lst.total_dead < 0 ||
+ c->lst.total_dead > c->lst.total_free + c->lst.total_dirty ||
+ c->lst.total_dead & 7) {
+ err = 22;
+ goto out;
+ }
+
+ if (c->lst.total_dark < 0 ||
+ c->lst.total_dark > c->lst.total_free + c->lst.total_dirty ||
+ c->lst.total_dark & 7) {
+ err = 23;
+ goto out;
+ }
+
+ return 0;
+
+out:
+ ubifs_err("bad master node at offset %d error %d", c->mst_offs, err);
+ dbg_dump_node(c, c->mst_node);
+ return -EINVAL;
+}
+
+/**
+ * ubifs_read_master - read master node.
+ * @c: UBIFS file-system description object
+ *
+ * This function finds and reads the master node during file-system mount. If
+ * the flash is empty, it creates default master node as well. Returns zero in
+ * case of success and a negative error code in case of failure.
+ */
+int ubifs_read_master(struct ubifs_info *c)
+{
+ int err, old_leb_cnt;
+
+ c->mst_node = kzalloc(c->mst_node_alsz, GFP_KERNEL);
+ if (!c->mst_node)
+ return -ENOMEM;
+
+ err = scan_for_master(c);
+ if (err) {
+ err = ubifs_recover_master_node(c);
+ if (err)
+ /*
+ * Note, we do not free 'c->mst_node' here because the
+ * unmount routine will take care of this.
+ */
+ return err;
+ }
+
+ /* Make sure that the recovery flag is clear */
+ c->mst_node->flags &= cpu_to_le32(~UBIFS_MST_RCVRY);
+
+ c->max_sqnum = le64_to_cpu(c->mst_node->ch.sqnum);
+ c->highest_inum = le64_to_cpu(c->mst_node->highest_inum);
+ c->cmt_no = le64_to_cpu(c->mst_node->cmt_no);
+ c->zroot.lnum = le32_to_cpu(c->mst_node->root_lnum);
+ c->zroot.offs = le32_to_cpu(c->mst_node->root_offs);
+ c->zroot.len = le32_to_cpu(c->mst_node->root_len);
+ c->lhead_lnum = le32_to_cpu(c->mst_node->log_lnum);
+ c->gc_lnum = le32_to_cpu(c->mst_node->gc_lnum);
+ c->ihead_lnum = le32_to_cpu(c->mst_node->ihead_lnum);
+ c->ihead_offs = le32_to_cpu(c->mst_node->ihead_offs);
+ c->old_idx_sz = le64_to_cpu(c->mst_node->index_size);
+ c->lpt_lnum = le32_to_cpu(c->mst_node->lpt_lnum);
+ c->lpt_offs = le32_to_cpu(c->mst_node->lpt_offs);
+ c->nhead_lnum = le32_to_cpu(c->mst_node->nhead_lnum);
+ c->nhead_offs = le32_to_cpu(c->mst_node->nhead_offs);
+ c->ltab_lnum = le32_to_cpu(c->mst_node->ltab_lnum);
+ c->ltab_offs = le32_to_cpu(c->mst_node->ltab_offs);
+ c->lsave_lnum = le32_to_cpu(c->mst_node->lsave_lnum);
+ c->lsave_offs = le32_to_cpu(c->mst_node->lsave_offs);
+ c->lscan_lnum = le32_to_cpu(c->mst_node->lscan_lnum);
+ c->lst.empty_lebs = le32_to_cpu(c->mst_node->empty_lebs);
+ c->lst.idx_lebs = le32_to_cpu(c->mst_node->idx_lebs);
+ old_leb_cnt = le32_to_cpu(c->mst_node->leb_cnt);
+ c->lst.total_free = le64_to_cpu(c->mst_node->total_free);
+ c->lst.total_dirty = le64_to_cpu(c->mst_node->total_dirty);
+ c->lst.total_used = le64_to_cpu(c->mst_node->total_used);
+ c->lst.total_dead = le64_to_cpu(c->mst_node->total_dead);
+ c->lst.total_dark = le64_to_cpu(c->mst_node->total_dark);
+
+ c->calc_idx_sz = c->old_idx_sz;
+
+ if (c->mst_node->flags & cpu_to_le32(UBIFS_MST_NO_ORPHS))
+ c->no_orphs = 1;
+
+ if (old_leb_cnt != c->leb_cnt) {
+ /* The file system has been resized */
+ int growth = c->leb_cnt - old_leb_cnt;
+
+ if (c->leb_cnt < old_leb_cnt ||
+ c->leb_cnt < UBIFS_MIN_LEB_CNT) {
+ ubifs_err("bad leb_cnt on master node");
+ dbg_dump_node(c, c->mst_node);
+ return -EINVAL;
+ }
+
+ dbg_mnt("Auto resizing (master) from %d LEBs to %d LEBs",
+ old_leb_cnt, c->leb_cnt);
+ c->lst.empty_lebs += growth;
+ c->lst.total_free += growth * (long long)c->leb_size;
+ c->lst.total_dark += growth * (long long)c->dark_wm;
+
+ /*
+ * Reflect changes back onto the master node. N.B. the master
+ * node gets written immediately whenever mounting (or
+ * remounting) in read-write mode, so we do not need to write it
+ * here.
+ */
+ c->mst_node->leb_cnt = cpu_to_le32(c->leb_cnt);
+ c->mst_node->empty_lebs = cpu_to_le32(c->lst.empty_lebs);
+ c->mst_node->total_free = cpu_to_le64(c->lst.total_free);
+ c->mst_node->total_dark = cpu_to_le64(c->lst.total_dark);
+ }
+
+ err = validate_master(c);
+ if (err)
+ return err;
+
+ err = dbg_old_index_check_init(c, &c->zroot);
+
+ return err;
+}
+
+/**
+ * ubifs_write_master - write master node.
+ * @c: UBIFS file-system description object
+ *
+ * This function writes the master node. The caller has to take the
+ * @c->mst_mutex lock before calling this function. Returns zero in case of
+ * success and a negative error code in case of failure. The master node is
+ * written twice to enable recovery.
+ */
+int ubifs_write_master(struct ubifs_info *c)
+{
+ int err, lnum, offs, len;
+
+ if (c->ro_media)
+ return -EINVAL;
+
+ lnum = UBIFS_MST_LNUM;
+ offs = c->mst_offs + c->mst_node_alsz;
+ len = UBIFS_MST_NODE_SZ;
+
+ if (offs + UBIFS_MST_NODE_SZ > c->leb_size) {
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ offs = 0;
+ }
+
+ c->mst_offs = offs;
+ c->mst_node->highest_inum = cpu_to_le64(c->highest_inum);
+
+ err = ubifs_write_node(c, c->mst_node, len, lnum, offs, UBI_SHORTTERM);
+ if (err)
+ return err;
+
+ lnum += 1;
+
+ if (offs == 0) {
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ }
+ err = ubifs_write_node(c, c->mst_node, len, lnum, offs, UBI_SHORTTERM);
+
+ return err;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/misc.h avr32-2.6/fs/ubifs/misc.h
--- linux-2.6.25.6/fs/ubifs/misc.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/misc.h 2008-06-12 15:09:45.475816115 +0200
@@ -0,0 +1,311 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file contains miscellaneous helper functions.
+ */
+
+#ifndef __UBIFS_MISC_H__
+#define __UBIFS_MISC_H__
+
+/**
+ * ubifs_zn_dirty - check if znode is dirty.
+ * @znode: znode to check
+ *
+ * This helper function returns %1 if @znode is dirty and %0 otherwise.
+ */
+static inline int ubifs_zn_dirty(const struct ubifs_znode *znode)
+{
+ return !!test_bit(DIRTY_ZNODE, &znode->flags);
+}
+
+/**
+ * ubifs_wake_up_bgt - wake up background thread.
+ * @c: UBIFS file-system description object
+ */
+static inline void ubifs_wake_up_bgt(struct ubifs_info *c)
+{
+ if (c->bgt && !c->need_bgt) {
+ c->need_bgt = 1;
+ wake_up_process(c->bgt);
+ }
+}
+
+/**
+ * ubifs_tnc_find_child - find next child in znode.
+ * @znode: znode to search at
+ * @start: the zbranch index to start at
+ *
+ * This helper function looks for znode child starting at index @start. Returns
+ * the child or %NULL if no children were found.
+ */
+static inline struct ubifs_znode *
+ubifs_tnc_find_child(struct ubifs_znode *znode, int start)
+{
+ while (start < znode->child_cnt) {
+ if (znode->zbranch[start].znode)
+ return znode->zbranch[start].znode;
+ start += 1;
+ }
+
+ return NULL;
+}
+
+/**
+ * ubifs_inode - get UBIFS inode information by VFS 'struct inode' object.
+ * @inode: the VFS 'struct inode' pointer
+ */
+static inline struct ubifs_inode *ubifs_inode(const struct inode *inode)
+{
+ return container_of(inode, struct ubifs_inode, vfs_inode);
+}
+
+/**
+ * ubifs_ro_mode - switch UBIFS to read read-only mode.
+ * @c: UBIFS file-system description object
+ * @err: error code which is the reason of switching to R/O mode
+ */
+static inline void ubifs_ro_mode(struct ubifs_info *c, int err)
+{
+ if (!c->ro_media) {
+ c->ro_media = 1;
+ ubifs_warn("switched to read-only mode, error %d", err);
+ dbg_dump_stack();
+ }
+}
+
+/**
+ * ubifs_compr_present - check if compressor was compiled in.
+ * @compr_type: compressor type to check
+ *
+ * This function returns %1 of compressor of type @compr_type is present, and
+ * %0 if not.
+ */
+static inline int ubifs_compr_present(int compr_type)
+{
+ ubifs_assert(compr_type >= 0 && compr_type < UBIFS_COMPR_TYPES_CNT);
+ return !!ubifs_compressors[compr_type]->capi_name;
+}
+
+/**
+ * ubifs_compr_name - get compressor name string by its type.
+ * @compr_type: compressor type
+ *
+ * This function returns compressor type string.
+ */
+static inline const char *ubifs_compr_name(int compr_type)
+{
+ ubifs_assert(compr_type >= 0 && compr_type < UBIFS_COMPR_TYPES_CNT);
+ return ubifs_compressors[compr_type]->name;
+}
+
+/**
+ * ubifs_wbuf_sync - synchronize write-buffer.
+ * @wbuf: write-buffer to synchronize
+ *
+ * This is the same as as 'ubifs_wbuf_sync_nolock()' but it does not assume
+ * that the write-buffer is already locked.
+ */
+static inline int ubifs_wbuf_sync(struct ubifs_wbuf *wbuf)
+{
+ int err;
+
+ mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
+ err = ubifs_wbuf_sync_nolock(wbuf);
+ mutex_unlock(&wbuf->io_mutex);
+ return err;
+}
+
+/**
+ * ubifs_leb_unmap - unmap an LEB.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number to unmap
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static inline int ubifs_leb_unmap(const struct ubifs_info *c, int lnum)
+{
+ int err;
+
+ err = ubi_leb_unmap(c->ubi, lnum);
+ if (err) {
+ ubifs_err("unmap LEB %d failed, error %d", lnum, err);
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * ubifs_leb_write - write to a LEB.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number to write
+ * @buf: buffer to write from
+ * @offs: offset within LEB to write to
+ * @len: length to write
+ * @dtype: data type
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static inline int ubifs_leb_write(const struct ubifs_info *c, int lnum,
+ const void *buf, int offs, int len, int dtype)
+{
+ int err;
+
+ err = ubi_leb_write(c->ubi, lnum, buf, offs, len, dtype);
+ if (err) {
+ ubifs_err("writing %d bytes at %d:%d, error %d",
+ len, lnum, offs, err);
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * ubifs_encode_dev - encode device node IDs.
+ * @dev: UBIFS device node information
+ * @rdev: device IDs to encode
+ *
+ * This is a helper function which encodes major/minor numbers of a device node
+ * into UBIFS device node description. We use standard Linux "new" and "huge"
+ * encodings.
+ */
+static inline int ubifs_encode_dev(union ubifs_dev_desc *dev, dev_t rdev)
+{
+ if (new_valid_dev(rdev)) {
+ dev->new = cpu_to_le32(new_encode_dev(rdev));
+ return sizeof(dev->new);
+ } else {
+ dev->huge = cpu_to_le64(huge_encode_dev(rdev));
+ return sizeof(dev->huge);
+ }
+}
+
+/**
+ * ubifs_add_dirt - add dirty space to LEB properties.
+ * @c: the UBIFS file-system description object
+ * @lnum: LEB to add dirty space for
+ * @dirty: dirty space to add
+ *
+ * This is a helper function which increased amount of dirty LEB space. Returns
+ * zero in case of success and a negative error code in case of failure.
+ */
+static inline int ubifs_add_dirt(struct ubifs_info *c, int lnum, int dirty)
+{
+ return ubifs_update_one_lp(c, lnum, LPROPS_NC, dirty, 0, 0);
+}
+
+/**
+ * ubifs_return_leb - return LEB to lprops.
+ * @c: the UBIFS file-system description object
+ * @lnum: LEB to return
+ *
+ * This helper function cleans the "taken" flag of a logical eraseblock in the
+ * lprops. Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+static inline int ubifs_return_leb(struct ubifs_info *c, int lnum)
+{
+ return ubifs_change_one_lp(c, lnum, LPROPS_NC, LPROPS_NC, 0,
+ LPROPS_TAKEN, 0);
+}
+
+/**
+ * ubifs_idx_node_sz - return index node size.
+ * @c: the UBIFS file-system description object
+ * @child_cnt: number of children of this index node
+ */
+static inline int ubifs_idx_node_sz(const struct ubifs_info *c, int child_cnt)
+{
+ return UBIFS_IDX_NODE_SZ + (UBIFS_BRANCH_SZ + c->key_len) * child_cnt;
+}
+
+/**
+ * ubifs_idx_branch - return pointer to an index branch.
+ * @c: the UBIFS file-system description object
+ * @idx: index node
+ * @bnum: branch number
+ */
+static inline
+struct ubifs_branch *ubifs_idx_branch(const struct ubifs_info *c,
+ const struct ubifs_idx_node *idx,
+ int bnum)
+{
+ return (struct ubifs_branch *)((void *)idx->branches +
+ (UBIFS_BRANCH_SZ + c->key_len) * bnum);
+}
+
+/**
+ * ubifs_idx_key - return pointer to an index key.
+ * @c: the UBIFS file-system description object
+ * @idx: index node
+ */
+static inline void *ubifs_idx_key(const struct ubifs_info *c,
+ const struct ubifs_idx_node *idx)
+{
+ return (void *)((struct ubifs_branch *)idx->branches)->key;
+}
+
+/**
+ * ubifs_reported_space - calculate reported free space.
+ * @c: the UBIFS file-system description object
+ * @free: amount of free space
+ *
+ * This function calculates amount of free space which will be reported to
+ * user-space. User-space application tend to expect that if the file-system
+ * (e.g., via the 'statfs()' call) reports that it has N bytes available, they
+ * are able to write a file of size N. UBIFS attaches node headers to each data
+ * node and it has to write indexind nodes as well. This introduces additional
+ * overhead, and UBIFS it has to report sligtly less free space to meet the
+ * above expectetion.
+ *
+ * This function assumes free space is made up of uncompressed data nodes and
+ * full index nodes (one per data node, doubled because we always allow enough
+ * space to write the index twice).
+ *
+ * Note, the calculation is pessimistic, which means that most of the time
+ * UBIFS reports less space than it actually has.
+ */
+static inline long long ubifs_reported_space(const struct ubifs_info *c,
+ uint64_t free)
+{
+ int divisor, factor;
+
+ divisor = UBIFS_MAX_DATA_NODE_SZ + (c->max_idx_node_sz << 1);
+ factor = UBIFS_MAX_DATA_NODE_SZ - UBIFS_DATA_NODE_SZ;
+ do_div(free, divisor);
+
+ return free * factor;
+}
+
+/**
+ * ubifs_current_time - round current time to time granularity.
+ * @inode: inode
+ */
+static inline struct timespec ubifs_current_time(struct inode *inode)
+{
+ return (inode->i_sb->s_time_gran < NSEC_PER_SEC) ?
+ current_fs_time(inode->i_sb) : CURRENT_TIME_SEC;
+}
+
+#endif /* __UBIFS_MISC_H__ */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/orphan.c avr32-2.6/fs/ubifs/orphan.c
--- linux-2.6.25.6/fs/ubifs/orphan.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/orphan.c 2008-06-12 15:09:45.475816115 +0200
@@ -0,0 +1,958 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Author: Adrian Hunter
+ */
+
+#include "ubifs.h"
+
+/*
+ * An orphan is an inode number whose inode node has been committed to the index
+ * with a link count of zero. That happens when an open file is deleted
+ * (unlinked) and then a commit is run. In the normal course of events the inode
+ * would be deleted when the file is closed. However in the case of an unclean
+ * unmount, orphans need to be accounted for. After an unclean unmount, the
+ * orphans' inodes must be deleted which means either scanning the entire index
+ * looking for them, or keeping a list on flash somewhere. This unit implements
+ * the latter approach.
+ *
+ * The orphan area is a fixed number of LEBs situated between the LPT area and
+ * the main area. The number of orphan area LEBs is specified when the file
+ * system is created. The minimum number is 1. The size of the orphan area
+ * should be so that it can hold the maximum number of orphans that are expected
+ * to ever exist at one time.
+ *
+ * The number of orphans that can fit in a LEB is:
+ *
+ * (c->leb_size - UBIFS_ORPH_NODE_SZ) / sizeof(__le64)
+ *
+ * For example: a 15872 byte LEB can fit 1980 orphans so 1 LEB may be enough.
+ *
+ * Orphans are accumulated in a rb-tree. When an inode's link count drops to
+ * zero, the inode number is added to the rb-tree. It is removed from the tree
+ * when the inode is deleted. Any new orphans that are in the orphan tree when
+ * the commit is run, are written to the orphan area in 1 or more orph nodes.
+ * If the orphan area is full, it is consolidated to make space. There is
+ * always enough space because validation prevents the user from creating more
+ * than the maximum number of orphans allowed.
+ */
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+static int dbg_check_orphans(struct ubifs_info *c);
+#else
+#define dbg_check_orphans(c) 0
+#endif
+
+/**
+ * ubifs_add_orphan - add an orphan.
+ * @c: UBIFS file-system description object
+ * @inum: orphan inode number
+ *
+ * Add an orphan. This function is called when an inodes link count drops to
+ * zero.
+ */
+int ubifs_add_orphan(struct ubifs_info *c, ino_t inum)
+{
+ struct ubifs_orphan *orphan, *o;
+ struct rb_node **p, *parent = NULL;
+
+ orphan = kzalloc(sizeof(struct ubifs_orphan), GFP_NOFS);
+ if (!orphan)
+ return -ENOMEM;
+ orphan->inum = inum;
+ orphan->new = 1;
+
+ spin_lock(&c->orphan_lock);
+ if (c->tot_orphans >= c->max_orphans) {
+ spin_unlock(&c->orphan_lock);
+ kfree(orphan);
+ return -ENFILE;
+ }
+ p = &c->orph_tree.rb_node;
+ while (*p) {
+ parent = *p;
+ o = rb_entry(parent, struct ubifs_orphan, rb);
+ if (inum < o->inum)
+ p = &(*p)->rb_left;
+ else if (inum > o->inum)
+ p = &(*p)->rb_right;
+ else {
+ dbg_err("orphaned twice");
+ spin_unlock(&c->orphan_lock);
+ kfree(orphan);
+ return 0;
+ }
+ }
+ c->tot_orphans += 1;
+ c->new_orphans += 1;
+ rb_link_node(&orphan->rb, parent, p);
+ rb_insert_color(&orphan->rb, &c->orph_tree);
+ list_add_tail(&orphan->list, &c->orph_list);
+ list_add_tail(&orphan->new_list, &c->orph_new);
+ spin_unlock(&c->orphan_lock);
+ dbg_gen("ino %lu", inum);
+ return 0;
+}
+
+/**
+ * ubifs_delete_orphan - delete an orphan.
+ * @c: UBIFS file-system description object
+ * @inum: orphan inode number
+ *
+ * Delete an orphan. This function is called when an inode is deleted.
+ */
+void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum)
+{
+ struct ubifs_orphan *o;
+ struct rb_node *p;
+
+ spin_lock(&c->orphan_lock);
+ p = c->orph_tree.rb_node;
+ while (p) {
+ o = rb_entry(p, struct ubifs_orphan, rb);
+ if (inum < o->inum)
+ p = p->rb_left;
+ else if (inum > o->inum)
+ p = p->rb_right;
+ else {
+ if (o->dnext) {
+ spin_unlock(&c->orphan_lock);
+ dbg_gen("deleted twice ino %lu", inum);
+ return;
+ }
+ if (o->cnext) {
+ o->dnext = c->orph_dnext;
+ c->orph_dnext = o;
+ spin_unlock(&c->orphan_lock);
+ dbg_gen("delete later ino %lu", inum);
+ return;
+ }
+ rb_erase(p, &c->orph_tree);
+ list_del(&o->list);
+ c->tot_orphans -= 1;
+ if (o->new) {
+ list_del(&o->new_list);
+ c->new_orphans -= 1;
+ }
+ spin_unlock(&c->orphan_lock);
+ kfree(o);
+ dbg_gen("inum %lu", inum);
+ return;
+ }
+ }
+ spin_unlock(&c->orphan_lock);
+ dbg_err("missing orphan ino %lu", inum);
+ dbg_dump_stack();
+}
+
+/**
+ * ubifs_orphan_start_commit - start commit of orphans.
+ * @c: UBIFS file-system description object
+ *
+ * Start commit of orphans.
+ */
+int ubifs_orphan_start_commit(struct ubifs_info *c)
+{
+ struct ubifs_orphan *orphan, **last;
+
+ spin_lock(&c->orphan_lock);
+ last = &c->orph_cnext;
+ list_for_each_entry(orphan, &c->orph_new, new_list) {
+ ubifs_assert(orphan->new);
+ orphan->new = 0;
+ *last = orphan;
+ last = &orphan->cnext;
+ }
+ *last = orphan->cnext;
+ c->cmt_orphans = c->new_orphans;
+ c->new_orphans = 0;
+ dbg_cmt("%d orphans to commit", c->cmt_orphans);
+ INIT_LIST_HEAD(&c->orph_new);
+ if (c->tot_orphans == 0)
+ c->no_orphs = 1;
+ else
+ c->no_orphs = 0;
+ spin_unlock(&c->orphan_lock);
+ return 0;
+}
+
+/**
+ * avail_orphs - calculate available space.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns the number of orphans that can be written in the
+ * available space.
+ */
+static int avail_orphs(struct ubifs_info *c)
+{
+ int avail_lebs, avail, gap;
+
+ avail_lebs = c->orph_lebs - (c->ohead_lnum - c->orph_first) - 1;
+ avail = avail_lebs *
+ ((c->leb_size - UBIFS_ORPH_NODE_SZ) / sizeof(__le64));
+ gap = c->leb_size - c->ohead_offs;
+ if (gap >= UBIFS_ORPH_NODE_SZ + sizeof(__le64))
+ avail += (gap - UBIFS_ORPH_NODE_SZ) / sizeof(__le64);
+ return avail;
+}
+
+/**
+ * tot_avail_orphs - calculate total space.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns the number of orphans that can be written in half
+ * the total space. That leaves half the space for adding new orphans.
+ */
+static int tot_avail_orphs(struct ubifs_info *c)
+{
+ int avail_lebs, avail;
+
+ avail_lebs = c->orph_lebs;
+ avail = avail_lebs *
+ ((c->leb_size - UBIFS_ORPH_NODE_SZ) / sizeof(__le64));
+ return avail / 2;
+}
+
+/**
+ * do_write_orph_node - write a node
+ * @c: UBIFS file-system description object
+ * @len: length of node
+ * @atomic: write atomically
+ *
+ * This function writes a node to the orphan head from the orphan buffer. If
+ * %atomic is not zero, then the write is done atomically. On success, %0 is
+ * returned, otherwise a negative error code is returned.
+ */
+static int do_write_orph_node(struct ubifs_info *c, int len, int atomic)
+{
+ int err = 0;
+
+ if (atomic) {
+ ubifs_assert(c->ohead_offs == 0);
+ ubifs_prepare_node(c, c->orph_buf, len, 1);
+ len = ALIGN(len, c->min_io_size);
+ err = ubi_leb_change(c->ubi, c->ohead_lnum, c->orph_buf, len,
+ UBI_SHORTTERM);
+ } else {
+ if (c->ohead_offs == 0) {
+ /* Ensure LEB has been unmapped */
+ err = ubifs_leb_unmap(c, c->ohead_lnum);
+ if (err)
+ return err;
+ }
+ err = ubifs_write_node(c, c->orph_buf, len, c->ohead_lnum,
+ c->ohead_offs, UBI_SHORTTERM);
+ }
+ return err;
+}
+
+/**
+ * write_orph_node - write an orph node
+ * @c: UBIFS file-system description object
+ * @atomic: write atomically
+ *
+ * This function builds an orph node from the cnext list and writes it to the
+ * orphan head. On success, %0 is returned, otherwise a negative error code
+ * is returned.
+ */
+static int write_orph_node(struct ubifs_info *c, int atomic)
+{
+ struct ubifs_orphan *orphan, *cnext;
+ struct ubifs_orph_node *orph;
+ int gap, err, len, cnt, i;
+
+ ubifs_assert(c->cmt_orphans > 0);
+ gap = c->leb_size - c->ohead_offs;
+ if (gap < UBIFS_ORPH_NODE_SZ + sizeof(__le64)) {
+ c->ohead_lnum += 1;
+ c->ohead_offs = 0;
+ gap = c->leb_size;
+ if (c->ohead_lnum > c->orph_last) {
+ /*
+ * We limit the number of orphans so that this should
+ * never happen.
+ */
+ ubifs_err("out of space in orphan area");
+ return -EINVAL;
+ }
+ }
+ cnt = (gap - UBIFS_ORPH_NODE_SZ) / sizeof(__le64);
+ if (cnt > c->cmt_orphans)
+ cnt = c->cmt_orphans;
+ len = UBIFS_ORPH_NODE_SZ + cnt * sizeof(__le64);
+ ubifs_assert(c->orph_buf);
+ orph = c->orph_buf;
+ orph->ch.node_type = UBIFS_ORPH_NODE;
+ spin_lock(&c->orphan_lock);
+ cnext = c->orph_cnext;
+ for (i = 0; i < cnt; i++) {
+ orphan = cnext;
+ orph->inos[i] = cpu_to_le64(orphan->inum);
+ cnext = orphan->cnext;
+ orphan->cnext = NULL;
+ }
+ c->orph_cnext = cnext;
+ c->cmt_orphans -= cnt;
+ spin_unlock(&c->orphan_lock);
+ if (c->cmt_orphans)
+ orph->cmt_no = cpu_to_le64(c->cmt_no + 1);
+ else
+ /* Mark the last node of the commit */
+ orph->cmt_no = cpu_to_le64((c->cmt_no + 1) | (1ULL << 63));
+ ubifs_assert(c->ohead_offs + len <= c->leb_size);
+ ubifs_assert(c->ohead_lnum >= c->orph_first);
+ ubifs_assert(c->ohead_lnum <= c->orph_last);
+ err = do_write_orph_node(c, len, atomic);
+ c->ohead_offs += ALIGN(len, c->min_io_size);
+ c->ohead_offs = ALIGN(c->ohead_offs, 8);
+ return err;
+}
+
+/**
+ * write_orph_nodes - write orph nodes until there are no more to commit
+ * @c: UBIFS file-system description object
+ * @atomic: write atomically
+ *
+ * This function writes orph nodes for all the orphans to commit. On success,
+ * %0 is returned, otherwise a negative error code is returned.
+ */
+static int write_orph_nodes(struct ubifs_info *c, int atomic)
+{
+ int err;
+
+ while (c->cmt_orphans > 0) {
+ err = write_orph_node(c, atomic);
+ if (err)
+ return err;
+ }
+ if (atomic) {
+ int lnum;
+
+ /* Unmap any unused LEBs after consolidation */
+ lnum = c->ohead_lnum + 1;
+ for (lnum = c->ohead_lnum + 1; lnum <= c->orph_last; lnum++) {
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ }
+ }
+ return 0;
+}
+
+/**
+ * consolidate - consolidate the orphan area.
+ * @c: UBIFS file-system description object
+ *
+ * This function enables consolidation by putting all the orphans into the list
+ * to commit. The list is in the order that the orphans were added, and the
+ * LEBs are written atomically in order, so at no time can orphans be lost by
+ * an unclean unmount.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int consolidate(struct ubifs_info *c)
+{
+ int tot_avail = tot_avail_orphs(c), err = 0;
+
+ spin_lock(&c->orphan_lock);
+ dbg_cmt("there is space for %d orphans and there are %d",
+ tot_avail, c->tot_orphans);
+ if (c->tot_orphans - c->new_orphans <= tot_avail) {
+ struct ubifs_orphan *orphan, **last;
+ int cnt = 0;
+
+ /* Change the cnext list to include all non-new orphans */
+ last = &c->orph_cnext;
+ list_for_each_entry(orphan, &c->orph_list, list) {
+ if (orphan->new)
+ continue;
+ *last = orphan;
+ last = &orphan->cnext;
+ cnt += 1;
+ }
+ *last = orphan->cnext;
+ ubifs_assert(cnt == c->tot_orphans - c->new_orphans);
+ c->cmt_orphans = cnt;
+ c->ohead_lnum = c->orph_first;
+ c->ohead_offs = 0;
+ } else {
+ /*
+ * We limit the number of orphans so that this should
+ * never happen.
+ */
+ ubifs_err("out of space in orphan area");
+ err = -EINVAL;
+ }
+ spin_unlock(&c->orphan_lock);
+ return err;
+}
+
+/**
+ * commit_orphans - commit orphans.
+ * @c: UBIFS file-system description object
+ *
+ * This function commits orphans to flash. On success, %0 is returned,
+ * otherwise a negative error code is returned.
+ */
+static int commit_orphans(struct ubifs_info *c)
+{
+ int avail, atomic = 0, err;
+
+ ubifs_assert(c->cmt_orphans > 0);
+ avail = avail_orphs(c);
+ if (avail < c->cmt_orphans) {
+ /* Not enough space to write new orphans, so consolidate */
+ err = consolidate(c);
+ if (err)
+ return err;
+ atomic = 1;
+ }
+ err = write_orph_nodes(c, atomic);
+ return err;
+}
+
+/**
+ * erase_deleted - erase the orphans marked for deletion.
+ * @c: UBIFS file-system description object
+ *
+ * During commit, the orphans being committed cannot be deleted, so they are
+ * marked for deletion and deleted by this function. Also, the recovery
+ * adds killed orphans to the deletion list, and therefore they are deleted
+ * here too.
+ */
+static void erase_deleted(struct ubifs_info *c)
+{
+ struct ubifs_orphan *orphan, *dnext;
+
+ spin_lock(&c->orphan_lock);
+ dnext = c->orph_dnext;
+ while (dnext) {
+ orphan = dnext;
+ dnext = orphan->dnext;
+ ubifs_assert(!orphan->new);
+ rb_erase(&orphan->rb, &c->orph_tree);
+ list_del(&orphan->list);
+ c->tot_orphans -= 1;
+ dbg_gen("deleting orphan ino %lu", orphan->inum);
+ kfree(orphan);
+ }
+ c->orph_dnext = NULL;
+ spin_unlock(&c->orphan_lock);
+}
+
+/**
+ * ubifs_orphan_end_commit - end commit of orphans.
+ * @c: UBIFS file-system description object
+ *
+ * End commit of orphans.
+ */
+int ubifs_orphan_end_commit(struct ubifs_info *c)
+{
+ int err;
+
+ if (c->cmt_orphans != 0) {
+ err = commit_orphans(c);
+ if (err)
+ return err;
+ }
+ erase_deleted(c);
+ err = dbg_check_orphans(c);
+ return err;
+}
+
+/**
+ * clear_orphans - erase all LEBs used for orphans.
+ * @c: UBIFS file-system description object
+ *
+ * If recovery is not required, then the orphans from the previous session
+ * are not needed. This function locates the LEBs used to record
+ * orphans, and un-maps them.
+ */
+static int clear_orphans(struct ubifs_info *c)
+{
+ int lnum, err;
+
+ for (lnum = c->orph_first; lnum <= c->orph_last; lnum++) {
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ }
+ c->ohead_lnum = c->orph_first;
+ c->ohead_offs = 0;
+ return 0;
+}
+
+/**
+ * insert_dead_orphan - insert an orphan.
+ * @c: UBIFS file-system description object
+ * @inum: orphan inode number
+ *
+ * This function is a helper to the 'do_kill_orphans()' function. The orphan
+ * must be kept until the next commit, so it is added to the rb-tree and the
+ * deletion list.
+ */
+static int insert_dead_orphan(struct ubifs_info *c, ino_t inum)
+{
+ struct ubifs_orphan *orphan, *o;
+ struct rb_node **p, *parent = NULL;
+
+ orphan = kzalloc(sizeof(struct ubifs_orphan), GFP_KERNEL);
+ if (!orphan)
+ return -ENOMEM;
+ orphan->inum = inum;
+
+ p = &c->orph_tree.rb_node;
+ while (*p) {
+ parent = *p;
+ o = rb_entry(parent, struct ubifs_orphan, rb);
+ if (inum < o->inum)
+ p = &(*p)->rb_left;
+ else if (inum > o->inum)
+ p = &(*p)->rb_right;
+ else {
+ /* Already added - no problem */
+ kfree(orphan);
+ return 0;
+ }
+ }
+ c->tot_orphans += 1;
+ rb_link_node(&orphan->rb, parent, p);
+ rb_insert_color(&orphan->rb, &c->orph_tree);
+ list_add_tail(&orphan->list, &c->orph_list);
+ orphan->dnext = c->orph_dnext;
+ c->orph_dnext = orphan;
+ dbg_mnt("ino %lu, new %d, tot %d",
+ inum, c->new_orphans, c->tot_orphans);
+ return 0;
+}
+
+/**
+ * do_kill_orphans - remove orphan inodes from the index.
+ * @c: UBIFS file-system description object
+ * @sleb: scanned LEB
+ * @last_cmt_no: cmt_no of last orph node read is passed and returned here
+ * @outofdate: whether the LEB is out of date is returned here
+ * @last_flagged: whether the end orph node is encountered
+ *
+ * This function is a helper to the 'kill_orphans()' function. It goes through
+ * every orphan node in a LEB and for every inode number recorded, removes
+ * all keys for that inode from the TNC.
+ */
+static int do_kill_orphans(struct ubifs_info *c, struct ubifs_scan_leb *sleb,
+ unsigned long long *last_cmt_no, int *outofdate,
+ int *last_flagged)
+{
+ struct ubifs_scan_node *snod;
+ struct ubifs_orph_node *orph;
+ unsigned long long cmt_no;
+ ino_t inum;
+ int i, n, err, first = 1;
+
+ list_for_each_entry(snod, &sleb->nodes, list) {
+ if (snod->type != UBIFS_ORPH_NODE) {
+ ubifs_err("invalid node type %d in orphan area at "
+ "%d:%d", snod->type, sleb->lnum, snod->offs);
+ dbg_dump_node(c, snod->node);
+ return -EINVAL;
+ }
+
+ orph = snod->node;
+
+ /* Check commit number */
+ cmt_no = le64_to_cpu(orph->cmt_no) & LLONG_MAX;
+ /*
+ * The commit number on the master node may be less, because
+ * of a failed commit. If there are several failed commits in a
+ * row, the commit number written on orph nodes will continue to
+ * increase (because the commit number is adjusted here) even
+ * though the commit number on the master node stays the same
+ * because the master node has not been re-written.
+ */
+ if (cmt_no > c->cmt_no)
+ c->cmt_no = cmt_no;
+ if (cmt_no < *last_cmt_no && *last_flagged) {
+ /*
+ * The last orph node had a higher commit number and was
+ * flagged as the last written for that commit number.
+ * That makes this orph node, out of date.
+ */
+ if (!first) {
+ ubifs_err("out of order commit number %llu in "
+ "orphan node at %d:%d",
+ cmt_no, sleb->lnum, snod->offs);
+ dbg_dump_node(c, snod->node);
+ return -EINVAL;
+ }
+ dbg_rcvry("out of date LEB %d", sleb->lnum);
+ *outofdate = 1;
+ return 0;
+ }
+
+ if (first)
+ first = 0;
+
+ n = (le32_to_cpu(orph->ch.len) - UBIFS_ORPH_NODE_SZ) >> 3;
+ for (i = 0; i < n; i++) {
+ inum = le64_to_cpu(orph->inos[i]);
+ dbg_rcvry("deleting orphaned inode %lu", inum);
+ err = ubifs_tnc_remove_ino(c, inum);
+ if (err)
+ return err;
+ err = insert_dead_orphan(c, inum);
+ if (err)
+ return err;
+ }
+
+ *last_cmt_no = cmt_no;
+ if (le64_to_cpu(orph->cmt_no) & (1ULL << 63)) {
+ dbg_rcvry("last orph node for commit %llu at %d:%d",
+ cmt_no, sleb->lnum, snod->offs);
+ *last_flagged = 1;
+ } else
+ *last_flagged = 0;
+ }
+
+ return 0;
+}
+
+/**
+ * kill_orphans - remove all orphan inodes from the index.
+ * @c: UBIFS file-system description object
+ *
+ * If recovery is required, then orphan inodes recorded during the previous
+ * session (which ended with an unclean unmount) must be deleted from the index.
+ * This is done by updating the TNC, but since the index is not updated until
+ * the next commit, the LEBs where the orphan information is recorded are not
+ * erased until the next commit.
+ */
+static int kill_orphans(struct ubifs_info *c)
+{
+ unsigned long long last_cmt_no = 0;
+ int lnum, err = 0, outofdate = 0, last_flagged = 0;
+
+ c->ohead_lnum = c->orph_first;
+ c->ohead_offs = 0;
+ /* Check no-orphans flag and skip this if no orphans */
+ if (c->no_orphs) {
+ dbg_rcvry("no orphans");
+ return 0;
+ }
+ /*
+ * Orph nodes always start at c->orph_first and are written to each
+ * successive LEB in turn. Generally unused LEBs will have been unmapped
+ * but may contain out of date orph nodes if the unmap didn't go
+ * through. In addition, the last orph node written for each commit is
+ * marked (top bit of orph->cmt_no is set to 1). It is possible that
+ * there are orph nodes from the next commit (i.e. the commit did not
+ * complete successfully). In that case, no orphans will have been lost
+ * due to the way that orphans are written, and any orphans added will
+ * be valid orphans anyway and so can be deleted.
+ */
+ for (lnum = c->orph_first; lnum <= c->orph_last; lnum++) {
+ struct ubifs_scan_leb *sleb;
+
+ dbg_rcvry("LEB %d", lnum);
+ sleb = ubifs_scan(c, lnum, 0, c->sbuf);
+ if (IS_ERR(sleb)) {
+ sleb = ubifs_recover_leb(c, lnum, 0, c->sbuf, 0);
+ if (IS_ERR(sleb)) {
+ err = PTR_ERR(sleb);
+ break;
+ }
+ }
+ err = do_kill_orphans(c, sleb, &last_cmt_no, &outofdate,
+ &last_flagged);
+ if (err || outofdate) {
+ ubifs_scan_destroy(sleb);
+ break;
+ }
+ if (sleb->endpt) {
+ c->ohead_lnum = lnum;
+ c->ohead_offs = sleb->endpt;
+ }
+ ubifs_scan_destroy(sleb);
+ }
+ return err;
+}
+
+/**
+ * ubifs_mount_orphans - delete orphan inodes and erase LEBs that recorded them.
+ * @c: UBIFS file-system description object
+ * @unclean: indicates recovery from unclean unmount
+ * @read_only: indicates read only mount
+ *
+ * This function is called when mounting to erase orphans from the previous
+ * session. If UBIFS was not unmounted cleanly, then the inodes recorded as
+ * orphans are deleted.
+ */
+int ubifs_mount_orphans(struct ubifs_info *c, int unclean, int read_only)
+{
+ int err = 0;
+
+ c->max_orphans = tot_avail_orphs(c);
+
+ if (!read_only) {
+ c->orph_buf = vmalloc(c->leb_size);
+ if (!c->orph_buf)
+ return -ENOMEM;
+ }
+
+ if (unclean)
+ err = kill_orphans(c);
+ else if (!read_only)
+ err = clear_orphans(c);
+
+ return err;
+}
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+
+struct check_orphan {
+ struct rb_node rb;
+ ino_t inum;
+};
+
+struct check_info {
+ unsigned long last_ino;
+ unsigned long tot_inos;
+ unsigned long missing;
+ unsigned long long leaf_cnt;
+ struct ubifs_ino_node *node;
+ struct rb_root root;
+};
+
+static int dbg_find_orphan(struct ubifs_info *c, ino_t inum)
+{
+ struct ubifs_orphan *o;
+ struct rb_node *p;
+
+ spin_lock(&c->orphan_lock);
+ p = c->orph_tree.rb_node;
+ while (p) {
+ o = rb_entry(p, struct ubifs_orphan, rb);
+ if (inum < o->inum)
+ p = p->rb_left;
+ else if (inum > o->inum)
+ p = p->rb_right;
+ else {
+ spin_unlock(&c->orphan_lock);
+ return 1;
+ }
+ }
+ spin_unlock(&c->orphan_lock);
+ return 0;
+}
+
+static int dbg_ins_check_orphan(struct rb_root *root, ino_t inum)
+{
+ struct check_orphan *orphan, *o;
+ struct rb_node **p, *parent = NULL;
+
+ orphan = kzalloc(sizeof(struct check_orphan), GFP_NOFS);
+ if (!orphan)
+ return -ENOMEM;
+ orphan->inum = inum;
+
+ p = &root->rb_node;
+ while (*p) {
+ parent = *p;
+ o = rb_entry(parent, struct check_orphan, rb);
+ if (inum < o->inum)
+ p = &(*p)->rb_left;
+ else if (inum > o->inum)
+ p = &(*p)->rb_right;
+ else {
+ kfree(orphan);
+ return 0;
+ }
+ }
+ rb_link_node(&orphan->rb, parent, p);
+ rb_insert_color(&orphan->rb, root);
+ return 0;
+}
+
+static int dbg_find_check_orphan(struct rb_root *root, ino_t inum)
+{
+ struct check_orphan *o;
+ struct rb_node *p;
+
+ p = root->rb_node;
+ while (p) {
+ o = rb_entry(p, struct check_orphan, rb);
+ if (inum < o->inum)
+ p = p->rb_left;
+ else if (inum > o->inum)
+ p = p->rb_right;
+ else
+ return 1;
+ }
+ return 0;
+}
+
+static void dbg_free_check_tree(struct rb_root *root)
+{
+ struct rb_node *this = root->rb_node;
+ struct check_orphan *o;
+
+ while (this) {
+ if (this->rb_left) {
+ this = this->rb_left;
+ continue;
+ } else if (this->rb_right) {
+ this = this->rb_right;
+ continue;
+ }
+ o = rb_entry(this, struct check_orphan, rb);
+ this = rb_parent(this);
+ if (this) {
+ if (this->rb_left == &o->rb)
+ this->rb_left = NULL;
+ else
+ this->rb_right = NULL;
+ }
+ kfree(o);
+ }
+}
+
+static int dbg_orphan_check(struct ubifs_info *c, struct ubifs_zbranch *zbr,
+ void *priv)
+{
+ struct check_info *ci = priv;
+ ino_t inum;
+ int err;
+
+ inum = key_inum(c, &zbr->key);
+ if (inum != ci->last_ino) {
+ /* Lowest node type is the inode node, so it comes first */
+ if (key_type(c, &zbr->key) != UBIFS_INO_KEY)
+ ubifs_err("found orphan node ino %lu, type %d", inum,
+ key_type(c, &zbr->key));
+ ci->last_ino = inum;
+ ci->tot_inos += 1;
+ err = ubifs_tnc_read_node(c, zbr, ci->node);
+ if (err) {
+ ubifs_err("node read failed, error %d", err);
+ return err;
+ }
+ if (ci->node->nlink == 0)
+ /* Must be recorded as an orphan */
+ if (!dbg_find_check_orphan(&ci->root, inum) &&
+ !dbg_find_orphan(c, inum)) {
+ ubifs_err("missing orphan, ino %lu", inum);
+ ci->missing += 1;
+ }
+ }
+ ci->leaf_cnt += 1;
+ return 0;
+}
+
+static int dbg_read_orphans(struct check_info *ci, struct ubifs_scan_leb *sleb)
+{
+ struct ubifs_scan_node *snod;
+ struct ubifs_orph_node *orph;
+ ino_t inum;
+ int i, n, err;
+
+ list_for_each_entry(snod, &sleb->nodes, list) {
+ cond_resched();
+ if (snod->type != UBIFS_ORPH_NODE)
+ continue;
+ orph = snod->node;
+ n = (le32_to_cpu(orph->ch.len) - UBIFS_ORPH_NODE_SZ) >> 3;
+ for (i = 0; i < n; i++) {
+ inum = le64_to_cpu(orph->inos[i]);
+ err = dbg_ins_check_orphan(&ci->root, inum);
+ if (err)
+ return err;
+ }
+ }
+ return 0;
+}
+
+static int dbg_scan_orphans(struct ubifs_info *c, struct check_info *ci)
+{
+ int lnum, err = 0;
+
+ /* Check no-orphans flag and skip this if no orphans */
+ if (c->no_orphs)
+ return 0;
+
+ for (lnum = c->orph_first; lnum <= c->orph_last; lnum++) {
+ struct ubifs_scan_leb *sleb;
+
+ sleb = ubifs_scan(c, lnum, 0, c->dbg_buf);
+ if (IS_ERR(sleb)) {
+ err = PTR_ERR(sleb);
+ break;
+ }
+
+ err = dbg_read_orphans(ci, sleb);
+ ubifs_scan_destroy(sleb);
+ if (err)
+ break;
+ }
+
+ return err;
+}
+
+static int dbg_check_orphans(struct ubifs_info *c)
+{
+ struct check_info ci;
+ int err;
+
+ if (!(ubifs_chk_flags & UBIFS_CHK_ORPH))
+ return 0;
+
+ ci.last_ino = 0;
+ ci.tot_inos = 0;
+ ci.missing = 0;
+ ci.leaf_cnt = 0;
+ ci.root = RB_ROOT;
+ ci.node = kmalloc(UBIFS_MAX_INO_NODE_SZ, GFP_NOFS);
+ if (!ci.node) {
+ ubifs_err("out of memory");
+ return -ENOMEM;
+ }
+
+ err = dbg_scan_orphans(c, &ci);
+ if (err)
+ goto out;
+
+ err = dbg_walk_index(c, &dbg_orphan_check, NULL, &ci);
+ if (err) {
+ ubifs_err("cannot scan TNC, error %d", err);
+ goto out;
+ }
+
+ if (ci.missing) {
+ ubifs_err("%lu missing orphan(s)", ci.missing);
+ err = -EINVAL;
+ goto out;
+ }
+
+ dbg_cmt("last inode number is %lu", ci.last_ino);
+ dbg_cmt("total number of inodes is %lu", ci.tot_inos);
+ dbg_cmt("total number of leaf nodes is %llu", ci.leaf_cnt);
+
+out:
+ dbg_free_check_tree(&ci.root);
+ kfree(ci.node);
+ return err;
+}
+
+#endif /* CONFIG_UBIFS_FS_DEBUG */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/recovery.c avr32-2.6/fs/ubifs/recovery.c
--- linux-2.6.25.6/fs/ubifs/recovery.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/recovery.c 2008-06-12 15:09:45.475816115 +0200
@@ -0,0 +1,1537 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file implements functions needed to recover from unclean un-mounts.
+ * When UBIFS is mounted, it checks a flag on the master node to determine if
+ * an un-mount was completed sucessfully. If not, the process of mounting
+ * incorparates additional checking and fixing of on-flash data structures.
+ * UBIFS always cleans away all remnants of an unclean un-mount, so that
+ * errors do not accumulate. However UBIFS defers recovery if it is mounted
+ * read-only, and the flash is not modified in that case.
+ */
+
+#include <linux/crc32.h>
+#include "ubifs.h"
+
+/**
+ * is_empty - determine whether a buffer is empty (contains all 0xff).
+ * @buf: buffer to clean
+ * @len: length of buffer
+ *
+ * This function returns %1 if the buffer is empty (contains all 0xff) otherwise
+ * %0 is returned.
+ */
+static int is_empty(void *buf, int len)
+{
+ uint8_t *p = buf;
+ int i;
+
+ for (i = 0; i < len; i++)
+ if (*p++ != 0xff)
+ return 0;
+ return 1;
+}
+
+/**
+ * get_master_node - get the last valid master node allowing for corruption.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number
+ * @pbuf: buffer containing the LEB read, is returned here
+ * @mst: master node, if found, is returned here
+ * @cor: corruption, if found, is returned here
+ *
+ * This function allocates a buffer, reads the LEB into it, and finds and
+ * returns the last valid master node allowing for one area of corruption.
+ * The corrupt area, if there is one, must be consistent with the assumption
+ * that it is the result of an unclean unmount while the master node was being
+ * written. Under those circumstances, it is valid to use the previously written
+ * master node.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int get_master_node(const struct ubifs_info *c, int lnum, void **pbuf,
+ struct ubifs_mst_node **mst, void **cor)
+{
+ const int sz = c->mst_node_alsz;
+ int err, offs, len;
+ void *sbuf, *buf;
+
+ sbuf = vmalloc(c->leb_size);
+ if (!sbuf)
+ return -ENOMEM;
+
+ err = ubi_read(c->ubi, lnum, sbuf, 0, c->leb_size);
+ if (err && err != -EBADMSG)
+ goto out_free;
+
+ /* Find the first position that is definitely not a node */
+ offs = 0;
+ buf = sbuf;
+ len = c->leb_size;
+ while (offs + UBIFS_MST_NODE_SZ <= c->leb_size) {
+ struct ubifs_ch *ch = buf;
+
+ if (le32_to_cpu(ch->magic) != UBIFS_NODE_MAGIC)
+ break;
+ offs += sz;
+ buf += sz;
+ len -= sz;
+ }
+ /* See if there was a valid master node before that */
+ if (offs) {
+ int ret;
+
+ offs -= sz;
+ buf -= sz;
+ len += sz;
+ ret = ubifs_scan_a_node(c, buf, len, lnum, offs, 1);
+ if (ret != SCANNED_A_NODE && offs) {
+ /* Could have been corruption so check one place back */
+ offs -= sz;
+ buf -= sz;
+ len += sz;
+ ret = ubifs_scan_a_node(c, buf, len, lnum, offs, 1);
+ if (ret != SCANNED_A_NODE)
+ /*
+ * We accept only one area of corruption because
+ * we are assuming that it was caused while
+ * trying to write a master node.
+ */
+ goto out_err;
+ }
+ if (ret == SCANNED_A_NODE) {
+ struct ubifs_ch *ch = buf;
+
+ if (ch->node_type != UBIFS_MST_NODE)
+ goto out_err;
+ dbg_rcvry("found a master node at %d:%d", lnum, offs);
+ *mst = buf;
+ offs += sz;
+ buf += sz;
+ len -= sz;
+ }
+ }
+ /* Check for corruption */
+ if (offs < c->leb_size) {
+ if (!is_empty(buf, min_t(int, len, sz))) {
+ *cor = buf;
+ dbg_rcvry("found corruption at %d:%d", lnum, offs);
+ }
+ offs += sz;
+ buf += sz;
+ len -= sz;
+ }
+ /* Check remaining empty space */
+ if (offs < c->leb_size)
+ if (!is_empty(buf, len))
+ goto out_err;
+ *pbuf = sbuf;
+ return 0;
+
+out_err:
+ err = -EINVAL;
+out_free:
+ vfree(sbuf);
+ *mst = NULL;
+ *cor = NULL;
+ return err;
+}
+
+/**
+ * write_rcvrd_mst_node - write recovered master node.
+ * @c: UBIFS file-system description object
+ * @mst: master node
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int write_rcvrd_mst_node(struct ubifs_info *c,
+ struct ubifs_mst_node *mst)
+{
+ int err = 0, lnum = UBIFS_MST_LNUM, sz = c->mst_node_alsz;
+ uint32_t save_flags;
+
+ dbg_rcvry("recovery");
+
+ save_flags = mst->flags;
+ mst->flags = cpu_to_le32(le32_to_cpu(mst->flags) | UBIFS_MST_RCVRY);
+
+ ubifs_prepare_node(c, mst, UBIFS_MST_NODE_SZ, 1);
+ err = ubi_leb_change(c->ubi, lnum, mst, sz, UBI_SHORTTERM);
+ if (err)
+ goto out;
+ err = ubi_leb_change(c->ubi, lnum + 1, mst, sz, UBI_SHORTTERM);
+ if (err)
+ goto out;
+out:
+ mst->flags = save_flags;
+ return err;
+}
+
+/**
+ * ubifs_recover_master_node - recover the master node.
+ * @c: UBIFS file-system description object
+ *
+ * This function recovers the master node from corruption that may occur due to
+ * an unclean unmount.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_recover_master_node(struct ubifs_info *c)
+{
+ void *buf1 = NULL, *buf2 = NULL, *cor1 = NULL, *cor2 = NULL;
+ struct ubifs_mst_node *mst1 = NULL, *mst2 = NULL, *mst;
+ const int sz = c->mst_node_alsz;
+ int err, offs1, offs2;
+
+ dbg_rcvry("recovery");
+
+ err = get_master_node(c, UBIFS_MST_LNUM, &buf1, &mst1, &cor1);
+ if (err)
+ goto out_free;
+
+ err = get_master_node(c, UBIFS_MST_LNUM + 1, &buf2, &mst2, &cor2);
+ if (err)
+ goto out_free;
+
+ if (mst1) {
+ offs1 = (void *)mst1 - buf1;
+ if ((le32_to_cpu(mst1->flags) & UBIFS_MST_RCVRY) &&
+ (offs1 == 0 && !cor1)) {
+ /*
+ * mst1 was written by recovery at offset 0 with no
+ * corruption.
+ */
+ dbg_rcvry("recovery recovery");
+ mst = mst1;
+ } else if (mst2) {
+ offs2 = (void *)mst2 - buf2;
+ if (offs1 == offs2) {
+ /* Same offset, so must be the same */
+ if (memcmp((void *)mst1 + UBIFS_CH_SZ,
+ (void *)mst2 + UBIFS_CH_SZ,
+ UBIFS_MST_NODE_SZ - UBIFS_CH_SZ))
+ goto out_err;
+ mst = mst1;
+ } else if (offs2 + sz == offs1) {
+ /* 1st LEB was written, 2nd was not */
+ if (cor1)
+ goto out_err;
+ mst = mst1;
+ } else if (offs1 == 0 && offs2 + sz >= c->leb_size) {
+ /* 1st LEB was unmapped and written, 2nd not */
+ if (cor1)
+ goto out_err;
+ mst = mst1;
+ } else
+ goto out_err;
+ } else {
+ /*
+ * 2nd LEB was unmapped and about to be written, so
+ * there must be only one master node in the first LEB
+ * and no corruption.
+ */
+ if (offs1 != 0 || cor1)
+ goto out_err;
+ mst = mst1;
+ }
+ } else {
+ if (!mst2)
+ goto out_err;
+ /*
+ * 1st LEB was unmapped and about to be written, so there must
+ * be no room left in 2nd LEB.
+ */
+ offs2 = (void *)mst2 - buf2;
+ if (offs2 + sz + sz <= c->leb_size)
+ goto out_err;
+ mst = mst2;
+ }
+
+ dbg_rcvry("recovered master node from LEB %d",
+ (mst == mst1 ? UBIFS_MST_LNUM : UBIFS_MST_LNUM + 1));
+
+ memcpy(c->mst_node, mst, UBIFS_MST_NODE_SZ);
+
+ if ((c->vfs_sb->s_flags & MS_RDONLY)) {
+ /* Read-only mode. Keep a copy for switching to rw mode */
+ c->rcvrd_mst_node = kmalloc(sz, GFP_KERNEL);
+ if (!c->rcvrd_mst_node) {
+ err = -ENOMEM;
+ goto out_free;
+ }
+ memcpy(c->rcvrd_mst_node, c->mst_node, UBIFS_MST_NODE_SZ);
+ } else {
+ /* Write the recovered master node */
+ c->max_sqnum = le64_to_cpu(mst->ch.sqnum) - 1;
+ err = write_rcvrd_mst_node(c, c->mst_node);
+ if (err)
+ goto out_free;
+ }
+
+ vfree(buf2);
+ vfree(buf1);
+
+ return 0;
+
+out_err:
+ err = -EINVAL;
+out_free:
+ ubifs_err("failed to recover master node");
+ if (mst1) {
+ dbg_err("dumping first master node");
+ dbg_dump_node(c, mst1);
+ }
+ if (mst2) {
+ dbg_err("dumping second master node");
+ dbg_dump_node(c, mst2);
+ }
+ vfree(buf2);
+ vfree(buf1);
+ return err;
+}
+
+/**
+ * ubifs_write_rcvrd_mst_node - write the recovered master node.
+ * @c: UBIFS file-system description object
+ *
+ * This function writes the master node that was recovered during mounting in
+ * read-only mode and must now be written because we are remounting rw.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_write_rcvrd_mst_node(struct ubifs_info *c)
+{
+ int err;
+
+ if (!c->rcvrd_mst_node)
+ return 0;
+ c->rcvrd_mst_node->flags |= cpu_to_le32(UBIFS_MST_DIRTY);
+ c->mst_node->flags |= cpu_to_le32(UBIFS_MST_DIRTY);
+ err = write_rcvrd_mst_node(c, c->rcvrd_mst_node);
+ if (err)
+ return err;
+ kfree(c->rcvrd_mst_node);
+ c->rcvrd_mst_node = NULL;
+ return 0;
+}
+
+/**
+ * is_last_write - determine if an offset was in the last write to a LEB.
+ * @c: UBIFS file-system description object
+ * @buf: buffer to check
+ * @offs: offset to check
+ *
+ * This function returns %1 if @offs was in the last write to the LEB whose data
+ * is in @buf, otherwise %0 is returned. The determination is made by checking
+ * for subsequent empty space starting from the next min_io_size boundary (or a
+ * bit less than the common header size if min_io_size is one).
+ */
+static int is_last_write(const struct ubifs_info *c, void *buf, int offs)
+{
+ int empty_offs;
+ int check_len;
+ uint8_t *p;
+
+ if (c->min_io_size == 1) {
+ check_len = c->leb_size - offs;
+ p = buf + check_len;
+ for (; check_len > 0; check_len--)
+ if (*--p != 0xff)
+ break;
+ /*
+ * 'check_len' is the size of the corruption which cannot be
+ * more than the size of 1 node if it was caused by an unclean
+ * unmount.
+ */
+ if (check_len > UBIFS_MAX_NODE_SZ)
+ return 0;
+ return 1;
+ }
+
+ /*
+ * Round up to the next c->min_io_size boundary i.e. 'offs' is in the
+ * last wbuf written. After that should be empty space.
+ */
+ empty_offs = ALIGN(offs + 1, c->min_io_size);
+ check_len = c->leb_size - empty_offs;
+ p = buf + empty_offs - offs;
+
+ for (; check_len > 0; check_len--)
+ if (*p++ != 0xff)
+ return 0;
+ return 1;
+}
+
+/**
+ * clean_buf - clean the data from an LEB sitting in a buffer.
+ * @c: UBIFS file-system description object
+ * @buf: buffer to clean
+ * @lnum: LEB number to clean
+ * @offs: offset from which to clean
+ * @len: length of buffer
+ *
+ * This function pads up to the next min_io_size boundary (if there is one) and
+ * sets empty space to all 0xff. @buf, @offs and @len are updated to the next
+ * min_io_size boundary (if there is one).
+ */
+static void clean_buf(const struct ubifs_info *c, void **buf, int lnum,
+ int *offs, int *len)
+{
+ int empty_offs, pad_len;
+
+ lnum = lnum;
+ dbg_rcvry("cleaning corruption at %d:%d", lnum, *offs);
+
+ if (c->min_io_size == 1) {
+ memset(*buf, 0xff, c->leb_size - *offs);
+ return;
+ }
+
+ ubifs_assert(!(*offs & 7));
+ empty_offs = ALIGN(*offs, c->min_io_size);
+ pad_len = empty_offs - *offs;
+ ubifs_pad(c, *buf, pad_len);
+ *offs += pad_len;
+ *buf += pad_len;
+ *len -= pad_len;
+ memset(*buf, 0xff, c->leb_size - empty_offs);
+}
+
+/**
+ * no_more_nodes - determine if there are no more nodes in a buffer.
+ * @c: UBIFS file-system description object
+ * @buf: buffer to check
+ * @len: length of buffer
+ * @lnum: LEB number of the LEB from which @buf was read
+ * @offs: offset from which @buf was read
+ *
+ * This function scans @buf for more nodes and returns %0 is a node is found and
+ * %1 if no more nodes are found.
+ */
+static int no_more_nodes(const struct ubifs_info *c, void *buf, int len,
+ int lnum, int offs)
+{
+ int skip, next_offs = 0;
+
+ if (len > UBIFS_DATA_NODE_SZ) {
+ struct ubifs_ch *ch = buf;
+ int dlen = le32_to_cpu(ch->len);
+
+ if (ch->node_type == UBIFS_DATA_NODE && dlen >= UBIFS_CH_SZ &&
+ dlen <= UBIFS_MAX_DATA_NODE_SZ)
+ /* The corrupt node looks like a data node */
+ next_offs = ALIGN(offs + dlen, 8);
+ }
+
+ if (c->min_io_size == 1)
+ skip = 8;
+ else
+ skip = ALIGN(offs + 1, c->min_io_size) - offs;
+
+ offs += skip;
+ buf += skip;
+ len -= skip;
+ while (len > 8) {
+ struct ubifs_ch *ch = buf;
+ uint32_t magic = le32_to_cpu(ch->magic);
+ int ret;
+
+ if (magic == UBIFS_NODE_MAGIC) {
+ ret = ubifs_scan_a_node(c, buf, len, lnum, offs, 1);
+ if (ret == SCANNED_A_NODE || ret > 0) {
+ /*
+ * There is a small chance this is just data in
+ * a data node, so check that possibility. e.g.
+ * this is part of a file that itself contains
+ * a UBIFS image.
+ */
+ if (next_offs && offs + le32_to_cpu(ch->len) <=
+ next_offs)
+ continue;
+ dbg_rcvry("unexpected node at %d:%d", lnum,
+ offs);
+ return 0;
+ }
+ }
+ offs += 8;
+ buf += 8;
+ len -= 8;
+ }
+ return 1;
+}
+
+/**
+ * fix_unclean_leb - fix an unclean LEB.
+ * @c: UBIFS file-system description object
+ * @sleb: scanned LEB information
+ * @start: offset where scan started
+ */
+static int fix_unclean_leb(struct ubifs_info *c, struct ubifs_scan_leb *sleb,
+ int start)
+{
+ int lnum = sleb->lnum, endpt = start;
+
+ /* Get the end offset of the last node we are keeping */
+ if (!list_empty(&sleb->nodes)) {
+ struct ubifs_scan_node *snod;
+
+ snod = list_entry(sleb->nodes.prev,
+ struct ubifs_scan_node, list);
+ endpt = snod->offs + snod->len;
+ }
+
+ if ((c->vfs_sb->s_flags & MS_RDONLY) && !c->remounting_rw) {
+ /* Add to recovery list */
+ struct ubifs_unclean_leb *ucleb;
+
+ dbg_rcvry("need to fix LEB %d start %d endpt %d",
+ lnum, start, sleb->endpt);
+ ucleb = kzalloc(sizeof(struct ubifs_unclean_leb), GFP_NOFS);
+ if (!ucleb)
+ return -ENOMEM;
+ ucleb->lnum = lnum;
+ ucleb->endpt = endpt;
+ list_add_tail(&ucleb->list, &c->unclean_leb_list);
+ } else {
+ /* Write the fixed LEB back to flash */
+ int err;
+
+ dbg_rcvry("fixing LEB %d start %d endpt %d",
+ lnum, start, sleb->endpt);
+ if (endpt == 0) {
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ } else {
+ int len = ALIGN(endpt, c->min_io_size);
+
+ if (start) {
+ err = ubi_read(c->ubi, lnum, sleb->buf, 0,
+ start);
+ if (err)
+ return err;
+ }
+ /* Pad to min_io_size */
+ if (len > endpt) {
+ int pad_len = len - ALIGN(endpt, 8);
+
+ if (pad_len > 0) {
+ void *buf = sleb->buf + len - pad_len;
+
+ ubifs_pad(c, buf, pad_len);
+ }
+ }
+ err = ubi_leb_change(c->ubi, lnum, sleb->buf, len,
+ UBI_UNKNOWN);
+ if (err)
+ return err;
+ }
+ }
+ return 0;
+}
+
+/**
+ * drop_incomplete_group - drop nodes from an incomplete group.
+ * @sleb: scanned LEB information
+ * @offs: offset of dropped nodes is returned here
+ *
+ * This function returns %1 if nodes are dropped and %0 otherwise.
+ */
+static int drop_incomplete_group(struct ubifs_scan_leb *sleb, int *offs)
+{
+ int dropped = 0;
+
+ while (!list_empty(&sleb->nodes)) {
+ struct ubifs_scan_node *snod;
+ struct ubifs_ch *ch;
+
+ snod = list_entry(sleb->nodes.prev, struct ubifs_scan_node,
+ list);
+ ch = snod->node;
+ if (ch->group_type != UBIFS_IN_NODE_GROUP)
+ return dropped;
+ dbg_rcvry("dropping node at %d:%d", sleb->lnum, snod->offs);
+ *offs = snod->offs;
+ list_del(&snod->list);
+ kfree(snod);
+ sleb->nodes_cnt -= 1;
+ dropped = 1;
+ }
+ return dropped;
+}
+
+/**
+ * ubifs_recover_leb - scan and recover a LEB.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number
+ * @offs: offset
+ * @sbuf: LEB-sized buffer to use
+ * @grouped: nodes may be grouped for recovery
+ *
+ * This function does a scan of a LEB, but caters for errors that might have
+ * been caused by the unclean unmount from which we are attempting to recover.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
+ int offs, void *sbuf, int grouped)
+{
+ int err, len = c->leb_size - offs, need_clean = 0, quiet = 1;
+ int empty_chkd = 0, start = offs;
+ struct ubifs_scan_leb *sleb;
+ void *buf = sbuf + offs;
+
+ dbg_rcvry("%d:%d", lnum, offs);
+
+ sleb = ubifs_start_scan(c, lnum, offs, sbuf);
+ if (IS_ERR(sleb))
+ return sleb;
+
+ if (sleb->ecc)
+ need_clean = 1;
+
+ while (len >= 8) {
+ int ret;
+
+ dbg_scan("look at LEB %d:%d (%d bytes left)",
+ lnum, offs, len);
+
+ cond_resched();
+
+ /*
+ * Scan quietly until there is an error from which we cannot
+ * recover
+ */
+ ret = ubifs_scan_a_node(c, buf, len, lnum, offs, quiet);
+
+ if (ret == SCANNED_A_NODE) {
+ /* A valid node, and not a padding node */
+ struct ubifs_ch *ch = buf;
+ int node_len;
+
+ err = ubifs_add_snod(c, sleb, buf, offs);
+ if (err)
+ goto error;
+ node_len = ALIGN(le32_to_cpu(ch->len), 8);
+ offs += node_len;
+ buf += node_len;
+ len -= node_len;
+ continue;
+ }
+
+ if (ret > 0) {
+ /* Padding bytes or a valid padding node */
+ offs += ret;
+ buf += ret;
+ len -= ret;
+ continue;
+ }
+
+ if (ret == SCANNED_EMPTY_SPACE) {
+ if (!is_empty(buf, len)) {
+ if (!is_last_write(c, buf, offs))
+ break;
+ clean_buf(c, &buf, lnum, &offs, &len);
+ need_clean = 1;
+ }
+ empty_chkd = 1;
+ break;
+ }
+
+ if (ret == SCANNED_GARBAGE || ret == SCANNED_A_BAD_PAD_NODE)
+ if (is_last_write(c, buf, offs)) {
+ clean_buf(c, &buf, lnum, &offs, &len);
+ need_clean = 1;
+ empty_chkd = 1;
+ break;
+ }
+
+ if (ret == SCANNED_A_CORRUPT_NODE)
+ if (no_more_nodes(c, buf, len, lnum, offs)) {
+ clean_buf(c, &buf, lnum, &offs, &len);
+ need_clean = 1;
+ empty_chkd = 1;
+ break;
+ }
+
+ if (quiet) {
+ /* Redo the last scan but noisily */
+ quiet = 0;
+ continue;
+ }
+
+ switch (ret) {
+ case SCANNED_GARBAGE:
+ dbg_err("garbage");
+ goto corrupted;
+ case SCANNED_A_CORRUPT_NODE:
+ case SCANNED_A_BAD_PAD_NODE:
+ dbg_err("bad node");
+ goto corrupted;
+ default:
+ dbg_err("unknown");
+ goto corrupted;
+ }
+ }
+
+ if (!empty_chkd && !is_empty(buf, len)) {
+ if (is_last_write(c, buf, offs)) {
+ clean_buf(c, &buf, lnum, &offs, &len);
+ need_clean = 1;
+ } else {
+ ubifs_err("corrupt empty space at LEB %d:%d",
+ lnum, offs);
+ goto corrupted;
+ }
+ }
+
+ /* Drop nodes from incomplete group */
+ if (grouped && drop_incomplete_group(sleb, &offs)) {
+ buf = sbuf + offs;
+ len = c->leb_size - offs;
+ clean_buf(c, &buf, lnum, &offs, &len);
+ need_clean = 1;
+ }
+
+ if (offs % c->min_io_size) {
+ clean_buf(c, &buf, lnum, &offs, &len);
+ need_clean = 1;
+ }
+
+ ubifs_end_scan(c, sleb, lnum, offs);
+
+ if (need_clean) {
+ err = fix_unclean_leb(c, sleb, start);
+ if (err)
+ goto error;
+ }
+
+ return sleb;
+
+corrupted:
+ ubifs_scanned_corruption(c, lnum, offs, buf);
+ err = -EUCLEAN;
+error:
+ ubifs_err("LEB %d scanning failed", lnum);
+ ubifs_scan_destroy(sleb);
+ return ERR_PTR(err);
+}
+
+/**
+ * get_cs_sqnum - get commit start sequence number.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number of commit start node
+ * @offs: offset of commit start node
+ * @cs_sqnum: commit start sequence number is returned here
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int get_cs_sqnum(struct ubifs_info *c, int lnum, int offs,
+ unsigned long long *cs_sqnum)
+{
+ struct ubifs_cs_node *cs_node = NULL;
+ int err, ret;
+
+ dbg_rcvry("at %d:%d", lnum, offs);
+ cs_node = kmalloc(UBIFS_CS_NODE_SZ, GFP_KERNEL);
+ if (!cs_node)
+ return -ENOMEM;
+ if (c->leb_size - offs < UBIFS_CS_NODE_SZ)
+ goto out_err;
+ err = ubi_read(c->ubi, lnum, (void *)cs_node, offs, UBIFS_CS_NODE_SZ);
+ if (err && err != -EBADMSG)
+ goto out_free;
+ ret = ubifs_scan_a_node(c, cs_node, UBIFS_CS_NODE_SZ, lnum, offs, 0);
+ if (ret != SCANNED_A_NODE) {
+ dbg_err("Not a valid node");
+ goto out_err;
+ }
+ if (cs_node->ch.node_type != UBIFS_CS_NODE) {
+ dbg_err("Node a CS node, type is %d", cs_node->ch.node_type);
+ goto out_err;
+ }
+ if (le64_to_cpu(cs_node->cmt_no) != c->cmt_no) {
+ dbg_err("CS node cmt_no %llu != current cmt_no %llu",
+ (unsigned long long)le64_to_cpu(cs_node->cmt_no),
+ c->cmt_no);
+ goto out_err;
+ }
+ *cs_sqnum = le64_to_cpu(cs_node->ch.sqnum);
+ dbg_rcvry("commit start sqnum %llu", *cs_sqnum);
+ kfree(cs_node);
+ return 0;
+
+out_err:
+ err = -EINVAL;
+out_free:
+ ubifs_err("failed to get CS sqnum");
+ kfree(cs_node);
+ return err;
+}
+
+/**
+ * ubifs_recover_log_leb - scan and recover a log LEB.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number
+ * @offs: offset
+ * @sbuf: LEB-sized buffer to use
+ *
+ * This function does a scan of a LEB, but caters for errors that might have
+ * been caused by the unclean unmount from which we are attempting to recover.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+struct ubifs_scan_leb *ubifs_recover_log_leb(struct ubifs_info *c, int lnum,
+ int offs, void *sbuf)
+{
+ struct ubifs_scan_leb *sleb;
+ int next_lnum;
+
+ dbg_rcvry("LEB %d", lnum);
+ next_lnum = lnum + 1;
+ if (next_lnum >= UBIFS_LOG_LNUM + c->log_lebs)
+ next_lnum = UBIFS_LOG_LNUM;
+ if (next_lnum != c->ltail_lnum) {
+ /*
+ * We can only recover at the end of the log, so check that the
+ * next log LEB is empty or out of date.
+ */
+ sleb = ubifs_scan(c, next_lnum, 0, sbuf);
+ if (IS_ERR(sleb))
+ return sleb;
+ if (sleb->nodes_cnt) {
+ struct ubifs_scan_node *snod;
+ unsigned long long cs_sqnum = c->cs_sqnum;
+
+ snod = list_entry(sleb->nodes.next,
+ struct ubifs_scan_node, list);
+ if (cs_sqnum == 0) {
+ int err;
+
+ err = get_cs_sqnum(c, lnum, offs, &cs_sqnum);
+ if (err) {
+ ubifs_scan_destroy(sleb);
+ return ERR_PTR(err);
+ }
+ }
+ if (snod->sqnum > cs_sqnum) {
+ ubifs_err("unrecoverable log corruption "
+ "in LEB %d", lnum);
+ ubifs_scan_destroy(sleb);
+ return ERR_PTR(-EUCLEAN);
+ }
+ }
+ ubifs_scan_destroy(sleb);
+ }
+ return ubifs_recover_leb(c, lnum, offs, sbuf, 0);
+}
+
+/**
+ * recover_head - recover a head.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number of head to recover
+ * @offs: offset of head to recover
+ * @sbuf: LEB-sized buffer to use
+ *
+ * This function ensures that there is no data on the flash at a head location.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int recover_head(const struct ubifs_info *c, int lnum, int offs,
+ void *sbuf)
+{
+ int len, err, need_clean = 0;
+
+ if (c->min_io_size > 1)
+ len = c->min_io_size;
+ else
+ len = 512;
+ if (offs + len > c->leb_size)
+ len = c->leb_size - offs;
+
+ if (!len)
+ return 0;
+
+ /* Read at the head location and check it is empty flash */
+ err = ubi_read(c->ubi, lnum, sbuf, offs, len);
+ if (err)
+ need_clean = 1;
+ else {
+ uint8_t *p = sbuf;
+
+ while (len--)
+ if (*p++ != 0xff) {
+ need_clean = 1;
+ break;
+ }
+ }
+
+ if (need_clean) {
+ dbg_rcvry("cleaning head at %d:%d", lnum, offs);
+ if (offs == 0)
+ return ubifs_leb_unmap(c, lnum);
+ err = ubi_read(c->ubi, lnum, sbuf, 0, offs);
+ if (err)
+ return err;
+ return ubi_leb_change(c->ubi, lnum, sbuf, offs, UBI_UNKNOWN);
+ }
+
+ return 0;
+}
+
+/**
+ * ubifs_recover_inl_heads - recover index and LPT heads.
+ * @c: UBIFS file-system description object
+ * @sbuf: LEB-sized buffer to use
+ *
+ * This function ensures that there is no data on the flash at the index and
+ * LPT head locations.
+ *
+ * This deals with the recovery of a half-completed journal commit. UBIFS is
+ * careful never to overwrite the last version of the index or the LPT. Because
+ * the index and LPT are wandering trees, data from a half-completed commit will
+ * not be referenced anywhere in UBIFS. The data will be either in LEBs that are
+ * assumed to be empty and will be unmapped anyway before use, or in the index
+ * and LPT heads.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_recover_inl_heads(const struct ubifs_info *c, void *sbuf)
+{
+ int err;
+
+ ubifs_assert(!(c->vfs_sb->s_flags & MS_RDONLY) || c->remounting_rw);
+
+ dbg_rcvry("checking index head at %d:%d", c->ihead_lnum, c->ihead_offs);
+ err = recover_head(c, c->ihead_lnum, c->ihead_offs, sbuf);
+ if (err)
+ return err;
+
+ dbg_rcvry("checking LPT head at %d:%d", c->nhead_lnum, c->nhead_offs);
+ err = recover_head(c, c->nhead_lnum, c->nhead_offs, sbuf);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+/**
+ * clean_an_unclean_leb - read and write a LEB to remove corruption.
+ * @c: UBIFS file-system description object
+ * @ucleb: unclean LEB information
+ * @sbuf: LEB-sized buffer to use
+ *
+ * This function reads a LEB up to a point pre-determined by the mount recovery,
+ * checks the nodes, and writes the result back to the flash, thereby cleaning
+ * off any following corruption, or non-fatal ECC errors.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int clean_an_unclean_leb(const struct ubifs_info *c,
+ struct ubifs_unclean_leb *ucleb, void *sbuf)
+{
+ int err, lnum = ucleb->lnum, offs = 0, len = ucleb->endpt, quiet = 1;
+ void *buf = sbuf;
+
+ dbg_rcvry("LEB %d len %d", lnum, len);
+
+ if (len == 0) {
+ /* Nothing to read, just unmap it */
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ return 0;
+ }
+
+ err = ubi_read(c->ubi, lnum, buf, offs, len);
+ if (err && err != -EBADMSG)
+ return err;
+
+ while (len >= 8) {
+ int ret;
+
+ cond_resched();
+
+ /* Scan quietly until there is an error */
+ ret = ubifs_scan_a_node(c, buf, len, lnum, offs, quiet);
+
+ if (ret == SCANNED_A_NODE) {
+ /* A valid node, and not a padding node */
+ struct ubifs_ch *ch = buf;
+ int node_len;
+
+ node_len = ALIGN(le32_to_cpu(ch->len), 8);
+ offs += node_len;
+ buf += node_len;
+ len -= node_len;
+ continue;
+ }
+
+ if (ret > 0) {
+ /* Padding bytes or a valid padding node */
+ offs += ret;
+ buf += ret;
+ len -= ret;
+ continue;
+ }
+
+ if (ret == SCANNED_EMPTY_SPACE) {
+ ubifs_err("unexpected empty space at %d:%d",
+ lnum, offs);
+ return -EUCLEAN;
+ }
+
+ if (quiet) {
+ /* Redo the last scan but noisily */
+ quiet = 0;
+ continue;
+ }
+
+ ubifs_scanned_corruption(c, lnum, offs, buf);
+ return -EUCLEAN;
+ }
+
+ /* Pad to min_io_size */
+ len = ALIGN(ucleb->endpt, c->min_io_size);
+ if (len > ucleb->endpt) {
+ int pad_len = len - ALIGN(ucleb->endpt, 8);
+
+ if (pad_len > 0) {
+ buf = c->sbuf + len - pad_len;
+ ubifs_pad(c, buf, pad_len);
+ }
+ }
+
+ /* Write back the LEB atomically */
+ err = ubi_leb_change(c->ubi, lnum, sbuf, len, UBI_UNKNOWN);
+ if (err)
+ return err;
+
+ dbg_rcvry("cleaned LEB %d", lnum);
+
+ return 0;
+}
+
+/**
+ * ubifs_clean_lebs - clean LEBs recovered during read-only mount.
+ * @c: UBIFS file-system description object
+ * @sbuf: LEB-sized buffer to use
+ *
+ * This function cleans a LEB identified during recovery that needs to be
+ * written but was not because UBIFS was mounted read-only. This happens when
+ * remounting to read-write mode.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_clean_lebs(const struct ubifs_info *c, void *sbuf)
+{
+ dbg_rcvry("recovery");
+ while (!list_empty(&c->unclean_leb_list)) {
+ struct ubifs_unclean_leb *ucleb;
+ int err;
+
+ ucleb = list_entry(c->unclean_leb_list.next,
+ struct ubifs_unclean_leb, list);
+ err = clean_an_unclean_leb(c, ucleb, sbuf);
+ if (err)
+ return err;
+ list_del(&ucleb->list);
+ kfree(ucleb);
+ }
+ return 0;
+}
+
+/**
+ * ubifs_rcvry_gc_commit - recover the GC LEB number and run the commit.
+ * @c: UBIFS file-system description object
+ *
+ * Out-of-place garbage collection requires always one empty LEB with which to
+ * start garbage collection. The LEB number is recorded in c->gc_lnum and is
+ * written to the master node on unmounting. In the case of an unclean unmount
+ * the value of gc_lnum recorded in the master node is out of date and cannot
+ * be used. Instead, recovery must allocate an empty LEB for this purpose.
+ * However, there may not be enough empty space, in which case it must be
+ * possible to GC the dirtiest LEB into the GC head LEB.
+ *
+ * This function also runs the commit which causes the TNC updates from
+ * size-recovery and orphans to be written to the flash. That is important to
+ * ensure correct replay order for subsequent mounts.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_rcvry_gc_commit(struct ubifs_info *c)
+{
+ struct ubifs_wbuf *wbuf = &c->jheads[GCHD].wbuf;
+ struct ubifs_lprops lp;
+ int lnum, err;
+
+ c->gc_lnum = -1;
+ if (wbuf->lnum == -1) {
+ dbg_rcvry("no GC head LEB");
+ goto find_free;
+ }
+ /*
+ * See whether the used space in the dirtiest LEB fits in the GC head
+ * LEB.
+ */
+ if (wbuf->offs == c->leb_size) {
+ dbg_rcvry("no room in GC head LEB");
+ goto find_free;
+ }
+ err = ubifs_find_dirty_leb(c, &lp, wbuf->offs, 2);
+ if (err) {
+ if (err == -ENOSPC)
+ dbg_err("could not find a dirty LEB");
+ return err;
+ }
+ ubifs_assert(!(lp.flags & LPROPS_INDEX));
+ lnum = lp.lnum;
+ if (lp.free + lp.dirty == c->leb_size) {
+ /* An empty LEB was returned */
+ if (lp.free != c->leb_size) {
+ err = ubifs_change_one_lp(c, lnum, c->leb_size,
+ 0, 0, 0, 0);
+ if (err)
+ return err;
+ }
+ err = ubifs_leb_unmap(c, lnum);
+ if (err)
+ return err;
+ c->gc_lnum = lnum;
+ dbg_rcvry("allocated LEB %d for GC", lnum);
+ /* Run the commit */
+ dbg_rcvry("committing");
+ return ubifs_run_commit(c);
+ }
+ /*
+ * There was no empty LEB so the used space in the dirtiest LEB must fit
+ * in the GC head LEB.
+ */
+ if (lp.free + lp.dirty < wbuf->offs) {
+ dbg_rcvry("LEB %d doesn't fit in GC head LEB %d:%d",
+ lnum, wbuf->lnum, wbuf->offs);
+ err = ubifs_return_leb(c, lnum);
+ if (err)
+ return err;
+ goto find_free;
+ }
+ /*
+ * We run the commit before garbage collection otherwise subsequent
+ * mounts will see the GC and orphan deletion in a different order.
+ */
+ dbg_rcvry("committing");
+ err = ubifs_run_commit(c);
+ if (err)
+ return err;
+ /*
+ * The data in the dirtiest LEB fits in the GC head LEB, so do the GC
+ * - use locking to keep 'ubifs_assert()' happy.
+ */
+ dbg_rcvry("GC'ing LEB %d", lnum);
+ mutex_lock_nested(&wbuf->io_mutex, wbuf->jhead);
+ err = ubifs_garbage_collect_leb(c, &lp);
+ if (err >= 0) {
+ int err2 = ubifs_wbuf_sync_nolock(wbuf);
+
+ if (err2)
+ err = err2;
+ }
+ mutex_unlock(&wbuf->io_mutex);
+ if (err < 0) {
+ dbg_err("GC failed, error %d", err);
+ if (err == -EAGAIN)
+ err = -EINVAL;
+ return err;
+ }
+ if (err != LEB_RETAINED) {
+ dbg_err("GC returned %d", err);
+ return -EINVAL;
+ }
+ err = ubifs_leb_unmap(c, c->gc_lnum);
+ if (err)
+ return err;
+ dbg_rcvry("allocated LEB %d for GC", lnum);
+ return 0;
+
+find_free:
+ /*
+ * There is no GC head LEB or the free space in the GC head LEB is too
+ * small. Allocate gc_lnum by calling 'ubifs_find_free_leb_for_idx()' so
+ * GC is not run.
+ */
+ lnum = ubifs_find_free_leb_for_idx(c);
+ if (lnum < 0) {
+ dbg_err("could not find an empty LEB");
+ return lnum;
+ }
+ /* And reset the index flag */
+ err = ubifs_change_one_lp(c, lnum, LPROPS_NC, LPROPS_NC, 0,
+ LPROPS_INDEX, 0);
+ if (err)
+ return err;
+ c->gc_lnum = lnum;
+ dbg_rcvry("allocated LEB %d for GC", lnum);
+ /* Run the commit */
+ dbg_rcvry("committing");
+ return ubifs_run_commit(c);
+}
+
+/**
+ * struct size_entry - inode size information for recovery.
+ * @rb: link in the RB-tree of sizes
+ * @inum: inode number
+ * @i_size: size on inode
+ * @d_size: maximum size based on data nodes
+ * @exists: indicates whether the inode exists
+ * @inode: inode if pinned in memory awaiting rw mode to fix it
+ */
+struct size_entry {
+ struct rb_node rb;
+ ino_t inum;
+ loff_t i_size;
+ loff_t d_size;
+ int exists;
+ struct inode *inode;
+};
+
+/**
+ * add_ino - add an entry to the size tree.
+ * @c: UBIFS file-system description object
+ * @inum: inode number
+ * @i_size: size on inode
+ * @d_size: maximum size based on data nodes
+ * @exists: indicates whether the inode exists
+ */
+static int add_ino(struct ubifs_info *c, ino_t inum, loff_t i_size,
+ loff_t d_size, int exists)
+{
+ struct rb_node **p = &c->size_tree.rb_node, *parent = NULL;
+ struct size_entry *e;
+
+ while (*p) {
+ parent = *p;
+ e = rb_entry(parent, struct size_entry, rb);
+ if (inum < e->inum)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ e = kzalloc(sizeof(struct size_entry), GFP_KERNEL);
+ if (!e)
+ return -ENOMEM;
+
+ e->inum = inum;
+ e->i_size = i_size;
+ e->d_size = d_size;
+ e->exists = exists;
+
+ rb_link_node(&e->rb, parent, p);
+ rb_insert_color(&e->rb, &c->size_tree);
+
+ return 0;
+}
+
+/**
+ * find_ino - find an entry on the size tree.
+ * @c: UBIFS file-system description object
+ * @inum: inode number
+ */
+static struct size_entry *find_ino(struct ubifs_info *c, ino_t inum)
+{
+ struct rb_node *p = c->size_tree.rb_node;
+ struct size_entry *e;
+
+ while (p) {
+ e = rb_entry(p, struct size_entry, rb);
+ if (inum < e->inum)
+ p = p->rb_left;
+ else if (inum > e->inum)
+ p = p->rb_right;
+ else
+ return e;
+ }
+ return NULL;
+}
+
+/**
+ * remove_ino - remove an entry from the size tree.
+ * @c: UBIFS file-system description object
+ * @inum: inode number
+ */
+static void remove_ino(struct ubifs_info *c, ino_t inum)
+{
+ struct size_entry *e = find_ino(c, inum);
+
+ if (!e)
+ return;
+ rb_erase(&e->rb, &c->size_tree);
+ kfree(e);
+}
+
+/**
+ * ubifs_destroy_size_tree - free resources related to the size tree.
+ * @c: UBIFS file-system description object
+ */
+void ubifs_destroy_size_tree(struct ubifs_info *c)
+{
+ struct rb_node *this = c->size_tree.rb_node;
+ struct size_entry *e;
+
+ while (this) {
+ if (this->rb_left) {
+ this = this->rb_left;
+ continue;
+ } else if (this->rb_right) {
+ this = this->rb_right;
+ continue;
+ }
+ e = rb_entry(this, struct size_entry, rb);
+ if (e->inode)
+ iput(e->inode);
+ this = rb_parent(this);
+ if (this) {
+ if (this->rb_left == &e->rb)
+ this->rb_left = NULL;
+ else
+ this->rb_right = NULL;
+ }
+ kfree(e);
+ }
+ c->size_tree = RB_ROOT;
+}
+
+/**
+ * ubifs_recover_size_accum - accumulate inode sizes for recovery.
+ * @c: UBIFS file-system description object
+ * @key: node key
+ * @deletion: node is for a deletion
+ * @new_size: inode size
+ *
+ * This function has two purposes:
+ * 1) to ensure there are no data nodes that fall outside the inode size
+ * 2) to ensure there are no data nodes for inodes that do not exist
+ * To accomplish those purposes, a rb-tree is constructed containing an entry
+ * for each inode number in the journal that has not been deleted, and recording
+ * the size from the inode node, the maximum size of any data node (also altered
+ * by truncations) and a flag indicating a inode number for which no inode node
+ * was present in the journal.
+ *
+ * Note that there is still the possibility that there are data nodes that have
+ * been committed that are beyond the inode size, however the only way to find
+ * them would be to scan the entire index. Alternatively, some provision could
+ * be made to record the size of inodes at the start of commit, which would seem
+ * very cumbersome for a scenario that is quite unlikely and the only negative
+ * consequence of which is wasted space.
+ *
+ * This functions returns %0 on success and a negative error code on failure.
+ */
+int ubifs_recover_size_accum(struct ubifs_info *c, union ubifs_key *key,
+ int deletion, loff_t new_size)
+{
+ ino_t inum = key_inum(c, key);
+ struct size_entry *e;
+ int err;
+
+ switch (key_type(c, key)) {
+ case UBIFS_INO_KEY:
+ if (deletion)
+ remove_ino(c, inum);
+ else {
+ e = find_ino(c, inum);
+ if (e) {
+ e->i_size = new_size;
+ e->exists = 1;
+ } else {
+ err = add_ino(c, inum, new_size, 0, 1);
+ if (err)
+ return err;
+ }
+ }
+ break;
+ case UBIFS_DATA_KEY:
+ e = find_ino(c, inum);
+ if (e) {
+ if (new_size > e->d_size)
+ e->d_size = new_size;
+ } else {
+ err = add_ino(c, inum, 0, new_size, 0);
+ if (err)
+ return err;
+ }
+ break;
+ case UBIFS_TRUN_KEY:
+ e = find_ino(c, inum);
+ if (e)
+ e->d_size = new_size;
+ break;
+ }
+ return 0;
+}
+
+/**
+ * fix_size_in_place - fix inode size in place on flash.
+ * @c: UBIFS file-system description object
+ * @e: inode size information for recovery
+ */
+static int fix_size_in_place(struct ubifs_info *c, struct size_entry *e)
+{
+ struct ubifs_ino_node *ino = c->sbuf;
+ unsigned char *p;
+ union ubifs_key key;
+ int err, lnum, offs, len;
+ loff_t i_size;
+ uint32_t crc;
+
+ /* Locate the inode node LEB number and offset */
+ ino_key_init(c, &key, e->inum);
+ err = ubifs_tnc_locate(c, &key, ino, &lnum, &offs);
+ if (err)
+ goto out;
+ /*
+ * If the size recorded on the inode node is greater than the size that
+ * was calculated from nodes in the journal then don't change the inode.
+ */
+ i_size = le64_to_cpu(ino->size);
+ if (i_size >= e->d_size)
+ return 0;
+ /* Read the LEB */
+ err = ubi_read(c->ubi, lnum, c->sbuf, 0, c->leb_size);
+ if (err)
+ goto out;
+ /* Change the size field and recalculate the CRC */
+ ino = c->sbuf + offs;
+ ino->size = cpu_to_le64(e->d_size);
+ len = le32_to_cpu(ino->ch.len);
+ crc = crc32(UBIFS_CRC32_INIT, (void *)ino + 8, len - 8);
+ ino->ch.crc = cpu_to_le32(crc);
+ /* Work out where data in the LEB ends and free space begins */
+ p = c->sbuf;
+ len = c->leb_size - 1;
+ while (p[len] == 0xff)
+ len -= 1;
+ len = ALIGN(len + 1, c->min_io_size);
+ /* Atomically write the fixed LEB back again */
+ err = ubi_leb_change(c->ubi, lnum, c->sbuf, len, UBI_UNKNOWN);
+ if (err)
+ goto out;
+ dbg_rcvry("inode %lu at %d:%d size %lld -> %lld ", e->inum, lnum, offs,
+ i_size, e->d_size);
+ return 0;
+
+out:
+ ubifs_warn("inode %lu failed to fix size %lld -> %lld error %d",
+ e->inum, e->i_size, e->d_size, err);
+ return err;
+}
+
+/**
+ * ubifs_recover_size - recover inode size.
+ * @c: UBIFS file-system description object
+ *
+ * This function attempts to fix inode size discrepancies identified by the
+ * 'ubifs_recover_size_accum()' function.
+ *
+ * This functions returns %0 on success and a negative error code on failure.
+ */
+int ubifs_recover_size(struct ubifs_info *c)
+{
+ struct rb_node *this = rb_first(&c->size_tree);
+
+ while (this) {
+ struct size_entry *e;
+ int err;
+
+ e = rb_entry(this, struct size_entry, rb);
+ if (!e->exists) {
+ union ubifs_key key;
+
+ ino_key_init(c, &key, e->inum);
+ err = ubifs_tnc_lookup(c, &key, c->sbuf);
+ if (err && err != -ENOENT)
+ return err;
+ if (err == -ENOENT) {
+ /* Remove data nodes that have no inode */
+ dbg_rcvry("removing ino %lu", e->inum);
+ err = ubifs_tnc_remove_ino(c, e->inum);
+ if (err)
+ return err;
+ } else {
+ struct ubifs_ino_node *ino = c->sbuf;
+
+ e->exists = 1;
+ e->i_size = le64_to_cpu(ino->size);
+ }
+ }
+ if (e->exists && e->i_size < e->d_size) {
+ if (!e->inode && (c->vfs_sb->s_flags & MS_RDONLY)) {
+ /* Fix the inode size and pin it in memory */
+ struct inode *inode;
+
+ inode = ubifs_iget(c->vfs_sb, e->inum);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+ if (inode->i_size < e->d_size) {
+ dbg_rcvry("ino %lu size %lld -> %lld",
+ e->inum, e->d_size,
+ inode->i_size);
+ inode->i_size = e->d_size;
+ e->inode = inode;
+ this = rb_next(this);
+ continue;
+ }
+ iput(inode);
+ } else {
+ /* Fix the size in place */
+ err = fix_size_in_place(c, e);
+ if (err) {
+ if (e->inode)
+ /*
+ * We have changed the inode
+ * size in memory but failed to
+ * fix it on flash. Mark it
+ * dirty without budgeting, and
+ * hope we don't run out of
+ * space.
+ */
+ mark_inode_dirty_sync(e->inode);
+ /*
+ * We consider that failing to recover
+ * the size is not fatal, because it
+ * only affects files that were being
+ * written without synchronization and
+ * the only down side is that some space
+ * may be wasted.
+ */
+ err = 0;
+ }
+ if (e->inode)
+ iput(e->inode);
+ }
+ }
+ this = rb_next(this);
+ rb_erase(&e->rb, &c->size_tree);
+ kfree(e);
+ }
+ return 0;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/replay.c avr32-2.6/fs/ubifs/replay.c
--- linux-2.6.25.6/fs/ubifs/replay.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/replay.c 2008-06-12 15:09:45.515816461 +0200
@@ -0,0 +1,1075 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file contains journal replay code. It runs when the file-system is being
+ * mounted and requires no locking.
+ *
+ * The larger is the journal, the longer it takes to scan it, so the longer it
+ * takes to mount UBIFS. This is why the journal has limited size which may be
+ * changed depending on the system requirements. But a larger journal gives
+ * faster I/O speed because it writes the index less frequently. So this is a
+ * trade-off. Also, the journal is indexed by the in-memory index (TNC), so the
+ * larger is the journal, the more memory its index may consume.
+ */
+
+#include "ubifs.h"
+
+/*
+ * Replay flags.
+ *
+ * REPLAY_DELETION: node was deleted
+ * REPLAY_REF: node is a reference node
+ */
+enum {
+ REPLAY_DELETION = 1,
+ REPLAY_REF = 2,
+};
+
+/**
+ * struct replay_entry - replay tree entry.
+ * @lnum: logical eraseblock number of the node
+ * @offs: node offset
+ * @len: node length
+ * @sqnum: node sequence number
+ * @flags: replay flags
+ * @rb: links the replay tree
+ * @key: node key
+ * @nm: directory entry name
+ * @old_size: truncation old size
+ * @new_size: truncation new size
+ * @free: amount of free space in a bud
+ * @dirty: amount of dirty space in a bud from padding and deletion nodes
+ *
+ * UBIFS journal replay must compare node sequence numbers, which means it must
+ * build a tree of node information to insert into the TNC.
+ */
+struct replay_entry {
+ int lnum;
+ int offs;
+ int len;
+ unsigned long long sqnum;
+ int flags;
+ struct rb_node rb;
+ union ubifs_key key;
+ union {
+ struct qstr nm;
+ struct {
+ loff_t old_size;
+ loff_t new_size;
+ };
+ struct {
+ int free;
+ int dirty;
+ };
+ };
+};
+
+/**
+ * struct bud_entry - entry in the list of buds to replay.
+ * @list: next bud in the list
+ * @bud: bud description object
+ * @free: free bytes in the bud
+ * @sqnum: reference node sequence number
+ */
+struct bud_entry {
+ struct list_head list;
+ struct ubifs_bud *bud;
+ int free;
+ unsigned long long sqnum;
+};
+
+/**
+ * set_bud_lprops - set free and dirty space used by a bud.
+ * @c: UBIFS file-system description object
+ * @r: replay entry of bud
+ */
+static int set_bud_lprops(struct ubifs_info *c, struct replay_entry *r)
+{
+ const struct ubifs_lprops *lp;
+ int err = 0, dirty;
+
+ ubifs_get_lprops(c);
+
+ lp = ubifs_lpt_lookup_dirty(c, r->lnum);
+ if (IS_ERR(lp)) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+
+ dirty = lp->dirty;
+ if (r->offs == 0 && (lp->free != c->leb_size || lp->dirty != 0)) {
+ /*
+ * The LEB was added to the journal with a starting offset of
+ * zero which means the LEB must have been empty. The LEB
+ * property values should be lp->free == c->leb_size and
+ * lp->dirty == 0, but that is not the case. The reason is that
+ * the LEB was garbage collected. The garbage collector resets
+ * the free and dirty space without recording it anywhere except
+ * lprops, so if there is not a commit then lprops does not have
+ * that information next time the file system is mounted.
+ *
+ * We do not need to adjust free space because the scan has told
+ * us the exact value which is recorded in the replay entry as
+ * r->free.
+ *
+ * However we do need to subtract from the dirty space the
+ * amount of space that the garbage collector reclaimed, which
+ * is the whole LEB minus the amount of space that was free.
+ */
+ dbg_mnt("bud LEB %d was GC'd (%d free, %d dirty)", r->lnum,
+ lp->free, lp->dirty);
+ dbg_gc("bud LEB %d was GC'd (%d free, %d dirty)", r->lnum,
+ lp->free, lp->dirty);
+ dirty -= c->leb_size - lp->free;
+ /*
+ * If the replay order was perfect the dirty space would now be
+ * zero. The order is not perfect because the the journal heads
+ * race with eachother. This is not a problem but is does mean
+ * that the dirty space may temporarily exceed c->leb_size
+ * during the replay.
+ */
+ if (dirty != 0)
+ dbg_msg("LEB %d lp: %d free %d dirty "
+ "replay: %d free %d dirty", r->lnum, lp->free,
+ lp->dirty, r->free, r->dirty);
+ }
+ lp = ubifs_change_lp(c, lp, r->free, dirty + r->dirty,
+ lp->flags | LPROPS_TAKEN, 0);
+ if (IS_ERR(lp)) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+out:
+ ubifs_release_lprops(c);
+ return err;
+}
+
+/**
+ * trun_remove_range - apply a replay entry for a truncation to the TNC.
+ * @c: UBIFS file-system description object
+ * @r: replay entry of truncation
+ */
+static int trun_remove_range(struct ubifs_info *c, struct replay_entry *r)
+{
+ unsigned min_blk, max_blk;
+ union ubifs_key min_key, max_key;
+ ino_t ino;
+
+ min_blk = r->new_size / UBIFS_BLOCK_SIZE;
+ if (r->new_size & (UBIFS_BLOCK_SIZE - 1))
+ min_blk += 1;
+
+ max_blk = r->old_size / UBIFS_BLOCK_SIZE;
+ if ((r->old_size & (UBIFS_BLOCK_SIZE - 1)) == 0)
+ max_blk -= 1;
+
+ ino = key_inum(c, &r->key);
+
+ data_key_init(c, &min_key, ino, min_blk);
+ data_key_init(c, &max_key, ino, max_blk);
+
+ return ubifs_tnc_remove_range(c, &min_key, &max_key);
+}
+
+/**
+ * apply_replay_entry - apply a replay entry to the TNC.
+ * @c: UBIFS file-system description object
+ * @r: replay entry to apply
+ *
+ * Apply a replay entry to the TNC.
+ */
+static int apply_replay_entry(struct ubifs_info *c, struct replay_entry *r)
+{
+ int err, deletion = ((r->flags & REPLAY_DELETION) != 0);
+
+ dbg_mnt("LEB %d:%d len %d flgs %d sqnum %llu %s", r->lnum,
+ r->offs, r->len, r->flags, r->sqnum, DBGKEY(&r->key));
+
+ /* Set c->replay_sqnum to help deal with dangling branches. */
+ c->replay_sqnum = r->sqnum;
+
+ if (r->flags & REPLAY_REF)
+ err = set_bud_lprops(c, r);
+ else if (is_hash_key(c, &r->key)) {
+ if (deletion)
+ err = ubifs_tnc_remove_nm(c, &r->key, &r->nm);
+ else
+ err = ubifs_tnc_add_nm(c, &r->key, r->lnum, r->offs,
+ r->len, &r->nm);
+ } else {
+ if (deletion)
+ switch (key_type(c, &r->key)) {
+ case UBIFS_INO_KEY:
+ {
+ ino_t inum = key_inum(c, &r->key);
+
+ err = ubifs_tnc_remove_ino(c, inum);
+ break;
+ }
+ case UBIFS_TRUN_KEY:
+ err = trun_remove_range(c, r);
+ break;
+ default:
+ err = ubifs_tnc_remove(c, &r->key);
+ break;
+ }
+ else
+ err = ubifs_tnc_add(c, &r->key, r->lnum, r->offs,
+ r->len);
+ if (err)
+ return err;
+
+ if (c->need_recovery)
+ err = ubifs_recover_size_accum(c, &r->key, deletion,
+ r->new_size);
+ }
+
+ return err;
+}
+
+/**
+ * destroy_replay_tree - destroy the replay.
+ * @c: UBIFS file-system description object
+ *
+ * Destroy the replay tree.
+ */
+static void destroy_replay_tree(struct ubifs_info *c)
+{
+ struct rb_node *this = c->replay_tree.rb_node;
+ struct replay_entry *r;
+
+ while (this) {
+ if (this->rb_left) {
+ this = this->rb_left;
+ continue;
+ } else if (this->rb_right) {
+ this = this->rb_right;
+ continue;
+ }
+ r = rb_entry(this, struct replay_entry, rb);
+ this = rb_parent(this);
+ if (this) {
+ if (this->rb_left == &r->rb)
+ this->rb_left = NULL;
+ else
+ this->rb_right = NULL;
+ }
+ if (is_hash_key(c, &r->key))
+ kfree(r->nm.name);
+ kfree(r);
+ }
+ c->replay_tree = RB_ROOT;
+}
+
+/**
+ * apply_replay_tree - apply the replay tree to the TNC.
+ * @c: UBIFS file-system description object
+ *
+ * Apply the replay tree.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+static int apply_replay_tree(struct ubifs_info *c)
+{
+ struct rb_node *this = rb_first(&c->replay_tree);
+
+ while (this) {
+ struct replay_entry *r;
+ int err;
+
+ cond_resched();
+
+ r = rb_entry(this, struct replay_entry, rb);
+ err = apply_replay_entry(c, r);
+ if (err)
+ return err;
+ this = rb_next(this);
+ }
+ return 0;
+}
+
+/**
+ * insert_node - insert a node to the replay tree.
+ * @c: UBIFS file-system description object
+ * @lnum: node logical eraseblock number
+ * @offs: node offset
+ * @len: node length
+ * @key: node key
+ * @sqnum: sequence number
+ * @deletion: non-zero if this is a deletion
+ * @used: number of bytes in use in a LEB
+ * @old_size: truncation old size
+ * @new_size: truncation new size
+ *
+ * This function inserts a scanned non-direntry node to the replay tree. The
+ * replay tree is an RB-tree containing @struct replay_entry elements which are
+ * indexed by the sequence number. The replay tree is applied at the very end
+ * of the replay process. Since the tree is sorted in sequence number order,
+ * the older modifications are applied first. This function returns zero in
+ * case of success and a negative error code in case of failure.
+ */
+static int insert_node(struct ubifs_info *c, int lnum, int offs, int len,
+ union ubifs_key *key, unsigned long long sqnum,
+ int deletion, int *used, loff_t old_size,
+ loff_t new_size)
+{
+ struct rb_node **p = &c->replay_tree.rb_node, *parent = NULL;
+ struct replay_entry *r;
+
+ if (key_inum(c, key) >= c->highest_inum)
+ c->highest_inum = key_inum(c, key);
+
+ dbg_mnt("add LEB %d:%d, key %s", lnum, offs, DBGKEY(key));
+ while (*p) {
+ parent = *p;
+ r = rb_entry(parent, struct replay_entry, rb);
+ if (sqnum < r->sqnum) {
+ p = &(*p)->rb_left;
+ continue;
+ } else if (sqnum > r->sqnum) {
+ p = &(*p)->rb_right;
+ continue;
+ }
+ ubifs_err("duplicate sqnum in replay");
+ return -EINVAL;
+ }
+
+ r = kzalloc(sizeof(struct replay_entry), GFP_KERNEL);
+ if (!r)
+ return -ENOMEM;
+
+ if (!deletion)
+ *used += ALIGN(len, 8);
+ r->lnum = lnum;
+ r->offs = offs;
+ r->len = len;
+ r->sqnum = sqnum;
+ r->flags = (deletion ? REPLAY_DELETION : 0);
+ r->old_size = old_size;
+ r->new_size = new_size;
+ key_copy(c, key, &r->key);
+
+ rb_link_node(&r->rb, parent, p);
+ rb_insert_color(&r->rb, &c->replay_tree);
+ return 0;
+}
+
+/**
+ * insert_dent - insert a directory entry node into the replay tree.
+ * @c: UBIFS file-system description object
+ * @lnum: node logical eraseblock number
+ * @offs: node offset
+ * @len: node length
+ * @key: node key
+ * @name: directory entry name
+ * @nlen: directory entry name length
+ * @sqnum: sequence number
+ * @deletion: non-zero if this is a deletion
+ * @used: number of bytes in use in a LEB
+ *
+ * This function inserts a scanned directory entry node to the replay tree.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ *
+ * This function is also used for extended attribute entries because they are
+ * implemented as directory entry nodes.
+ */
+static int insert_dent(struct ubifs_info *c, int lnum, int offs, int len,
+ union ubifs_key *key, const char *name, int nlen,
+ unsigned long long sqnum, int deletion, int *used)
+{
+ struct rb_node **p = &c->replay_tree.rb_node, *parent = NULL;
+ struct replay_entry *r;
+ char *nbuf;
+
+ if (key_inum(c, key) >= c->highest_inum)
+ c->highest_inum = key_inum(c, key);
+
+ dbg_mnt("add LEB %d:%d, key %s", lnum, offs, DBGKEY(key));
+ while (*p) {
+ parent = *p;
+ r = rb_entry(parent, struct replay_entry, rb);
+ if (sqnum < r->sqnum) {
+ p = &(*p)->rb_left;
+ continue;
+ }
+ if (sqnum > r->sqnum) {
+ p = &(*p)->rb_right;
+ continue;
+ }
+ ubifs_err("duplicate sqnum in replay");
+ return -EINVAL;
+ }
+
+ r = kzalloc(sizeof(struct replay_entry), GFP_KERNEL);
+ if (!r)
+ return -ENOMEM;
+ nbuf = kmalloc(nlen + 1, GFP_KERNEL);
+ if (!nbuf) {
+ kfree(r);
+ return -ENOMEM;
+ }
+
+ if (!deletion)
+ *used += ALIGN(len, 8);
+ r->lnum = lnum;
+ r->offs = offs;
+ r->len = len;
+ r->sqnum = sqnum;
+ r->nm.len = nlen;
+ memcpy(nbuf, name, nlen);
+ nbuf[nlen] = '\0';
+ r->nm.name = nbuf;
+ r->flags = (deletion ? REPLAY_DELETION : 0);
+ key_copy(c, key, &r->key);
+
+ ubifs_assert(!*p);
+ rb_link_node(&r->rb, parent, p);
+ rb_insert_color(&r->rb, &c->replay_tree);
+ return 0;
+}
+
+/**
+ * ubifs_validate_entry - validate directory or extended attribute entry node.
+ * @c: UBIFS file-system description object
+ * @dent: the node to validate
+ *
+ * This function validates directory or extended attribute entry node @dent.
+ * Returns zero if the node is all right and a %-EINVAL if not.
+ */
+int ubifs_validate_entry(struct ubifs_info *c,
+ const struct ubifs_dent_node *dent)
+{
+ int key_type = key_type_flash(c, dent->key);
+ int nlen = le16_to_cpu(dent->nlen);
+
+ if (le32_to_cpu(dent->ch.len) != nlen + UBIFS_DENT_NODE_SZ + 1 ||
+ dent->type >= UBIFS_ITYPES_CNT ||
+ nlen > UBIFS_MAX_NLEN || dent->name[nlen] != 0 ||
+ strnlen(dent->name, nlen) != nlen ||
+ le64_to_cpu(dent->inum) > MAX_INUM) {
+ ubifs_err("bad %s node", key_type == UBIFS_DENT_KEY ?
+ "directory entry" : "extended attribute entry");
+ return -EINVAL;
+ }
+
+ if (key_type != UBIFS_DENT_KEY && key_type != UBIFS_XENT_KEY) {
+ ubifs_err("bad key type %d", key_type);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * replay_bud - replay a bud logical eraseblock.
+ * @c: UBIFS file-system description object
+ * @lnum: bud logical eraseblock number to replay
+ * @offs: bud start offset
+ * @jhead: journal head to which this bud belongs
+ * @free: amount of free space in the bud is returned here
+ * @dirty: amount of dirty space from padding and deletion nodes is returned
+ * here
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int replay_bud(struct ubifs_info *c, int lnum, int offs, int jhead,
+ int *free, int *dirty)
+{
+ int err = 0, used = 0;
+ struct ubifs_scan_leb *sleb;
+ struct ubifs_scan_node *snod;
+ struct ubifs_bud *bud;
+
+ dbg_mnt("replay bud LEB %d, head %d", lnum, jhead);
+ if (c->need_recovery)
+ sleb = ubifs_recover_leb(c, lnum, offs, c->sbuf, jhead != GCHD);
+ else
+ sleb = ubifs_scan(c, lnum, offs, c->sbuf);
+ if (IS_ERR(sleb))
+ return PTR_ERR(sleb);
+
+ /*
+ * The bud does not have to start from offset zero - the beginning of
+ * the 'lnum' LEB may contain previously committed data. One of the
+ * things we have to do in replay is to correctly update lprops with
+ * newer information about this LEB.
+ *
+ * At this point lprops thinks that this LEB has 'c->leb_size - offs'
+ * bytes of free space because it only contain information about
+ * committed data.
+ *
+ * But we know that real amount of free space is 'c->leb_size -
+ * sleb->endpt', and the space in the 'lnum' LEB between 'offs' and
+ * 'sleb->endpt' is used by bud data. We have to correctly calculate
+ * how much of these data are dirty and update lprops with this
+ * information.
+ *
+ * The dirt in that LEB region is comprised of padding nodes, deletion
+ * nodes, truncation nodes and nodes which are obsoleted by subsequent
+ * nodes in this LEB. So instead of calculating clean space, we
+ * calculate used space ('used' variable).
+ */
+
+ list_for_each_entry(snod, &sleb->nodes, list) {
+ int deletion = 0;
+
+ cond_resched();
+
+ if (snod->sqnum >= SQNUM_WATERMARK) {
+ ubifs_err("file system's life ended");
+ goto out_dump;
+ }
+
+ if (snod->sqnum > c->max_sqnum)
+ c->max_sqnum = snod->sqnum;
+
+ switch (snod->type) {
+ case UBIFS_INO_NODE:
+ {
+ struct ubifs_ino_node *ino = snod->node;
+ loff_t new_size = le64_to_cpu(ino->size);
+
+ if (le32_to_cpu(ino->nlink) == 0)
+ deletion = 1;
+ err = insert_node(c, lnum, snod->offs, snod->len,
+ &snod->key, snod->sqnum, deletion,
+ &used, 0, new_size);
+ break;
+ }
+ case UBIFS_DATA_NODE:
+ {
+ struct ubifs_data_node *dn = snod->node;
+ loff_t new_size = le32_to_cpu(dn->size) +
+ key_block(c, &snod->key) *
+ UBIFS_BLOCK_SIZE;
+
+ err = insert_node(c, lnum, snod->offs, snod->len,
+ &snod->key, snod->sqnum, deletion,
+ &used, 0, new_size);
+ break;
+ }
+ case UBIFS_DENT_NODE:
+ case UBIFS_XENT_NODE:
+ {
+ struct ubifs_dent_node *dent = snod->node;
+
+ err = ubifs_validate_entry(c, dent);
+ if (err)
+ goto out_dump;
+
+ err = insert_dent(c, lnum, snod->offs, snod->len,
+ &snod->key, dent->name,
+ le16_to_cpu(dent->nlen), snod->sqnum,
+ !le64_to_cpu(dent->inum), &used);
+ break;
+ }
+ case UBIFS_TRUN_NODE:
+ {
+ struct ubifs_trun_node *trun = snod->node;
+ loff_t old_size = le64_to_cpu(trun->old_size);
+ loff_t new_size = le64_to_cpu(trun->new_size);
+ union ubifs_key key;
+
+ /* Validate truncation node */
+ if (old_size < 0 || old_size > c->max_inode_sz ||
+ new_size < 0 || new_size > c->max_inode_sz ||
+ old_size <= new_size) {
+ ubifs_err("bad truncation node");
+ goto out_dump;
+ }
+
+ /*
+ * Create a fake truncation key just to use the same
+ * functions which expect nodes to have keys.
+ */
+ trun_key_init(c, &key, le32_to_cpu(trun->inum));
+ err = insert_node(c, lnum, snod->offs, snod->len,
+ &key, snod->sqnum, 1, &used,
+ old_size, new_size);
+ break;
+ }
+ default:
+ ubifs_err("unexpected node type %d in bud LEB %d:%d",
+ snod->type, lnum, snod->offs);
+ err = -EINVAL;
+ goto out_dump;
+ }
+ if (err)
+ goto out;
+ }
+
+ bud = ubifs_search_bud(c, lnum);
+ if (!bud)
+ BUG();
+
+ ubifs_assert(sleb->endpt - offs >= used);
+ ubifs_assert(sleb->endpt % c->min_io_size == 0);
+
+ if (sleb->endpt + c->min_io_size <= c->leb_size &&
+ !(c->vfs_sb->s_flags & MS_RDONLY))
+ err = ubifs_wbuf_seek_nolock(&c->jheads[jhead].wbuf, lnum,
+ sleb->endpt, UBI_SHORTTERM);
+
+ *dirty = sleb->endpt - offs - used;
+ *free = c->leb_size - sleb->endpt;
+
+out:
+ ubifs_scan_destroy(sleb);
+ return err;
+
+out_dump:
+ ubifs_err("bad node is at LEB %d:%d", lnum, snod->offs);
+ dbg_dump_node(c, snod->node);
+ ubifs_scan_destroy(sleb);
+ return -EINVAL;
+}
+
+/**
+ * insert_ref_node - insert a reference node to the replay tree.
+ * @c: UBIFS file-system description object
+ * @lnum: node logical eraseblock number
+ * @offs: node offset
+ * @sqnum: sequence number
+ * @free: amount of free space in bud
+ * @dirty: amount of dirty space from padding and deletion nodes
+ *
+ * This function inserts a reference node to the replay tree and returns zero
+ * in case of success ort a negative error code in case of failure.
+ */
+static int insert_ref_node(struct ubifs_info *c, int lnum, int offs,
+ unsigned long long sqnum, int free, int dirty)
+{
+ struct rb_node **p = &c->replay_tree.rb_node, *parent = NULL;
+ struct replay_entry *r;
+
+ dbg_mnt("add ref LEB %d:%d", lnum, offs);
+ while (*p) {
+ parent = *p;
+ r = rb_entry(parent, struct replay_entry, rb);
+ if (sqnum < r->sqnum) {
+ p = &(*p)->rb_left;
+ continue;
+ } else if (sqnum > r->sqnum) {
+ p = &(*p)->rb_right;
+ continue;
+ }
+ ubifs_err("duplicate sqnum in replay tree");
+ return -EINVAL;
+ }
+
+ r = kzalloc(sizeof(struct replay_entry), GFP_KERNEL);
+ if (!r)
+ return -ENOMEM;
+
+ r->lnum = lnum;
+ r->offs = offs;
+ r->sqnum = sqnum;
+ r->flags = REPLAY_REF;
+ r->free = free;
+ r->dirty = dirty;
+
+ rb_link_node(&r->rb, parent, p);
+ rb_insert_color(&r->rb, &c->replay_tree);
+ return 0;
+}
+
+/**
+ * replay_buds - replay all buds.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int replay_buds(struct ubifs_info *c)
+{
+ struct bud_entry *b;
+ int err, uninitialized_var(free), uninitialized_var(dirty);
+
+ list_for_each_entry(b, &c->replay_buds, list) {
+ err = replay_bud(c, b->bud->lnum, b->bud->start, b->bud->jhead,
+ &free, &dirty);
+ if (err)
+ return err;
+ err = insert_ref_node(c, b->bud->lnum, b->bud->start, b->sqnum,
+ free, dirty);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+/**
+ * destroy_bud_list - destroy the list of buds to replay.
+ * @c: UBIFS file-system description object
+ */
+static void destroy_bud_list(struct ubifs_info *c)
+{
+ struct bud_entry *b;
+
+ while (!list_empty(&c->replay_buds)) {
+ b = list_entry(c->replay_buds.next, struct bud_entry, list);
+ list_del(&b->list);
+ kfree(b);
+ }
+}
+
+/**
+ * add_replay_bud - add a bud to the list of buds to replay.
+ * @c: UBIFS file-system description object
+ * @lnum: bud logical eraseblock number to replay
+ * @offs: bud start offset
+ * @jhead: journal head to which this bud belongs
+ * @sqnum: reference node sequence number
+ *
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int add_replay_bud(struct ubifs_info *c, int lnum, int offs, int jhead,
+ unsigned long long sqnum)
+{
+ struct ubifs_bud *bud;
+ struct bud_entry *b;
+
+ dbg_mnt("add replay bud LEB %d:%d, head %d", lnum, offs, jhead);
+
+ bud = kmalloc(sizeof(struct ubifs_bud), GFP_KERNEL);
+ if (!bud)
+ return -ENOMEM;
+
+ b = kmalloc(sizeof(struct bud_entry), GFP_KERNEL);
+ if (!b) {
+ kfree(bud);
+ return -ENOMEM;
+ }
+
+ bud->lnum = lnum;
+ bud->start = offs;
+ bud->jhead = jhead;
+ ubifs_add_bud(c, bud);
+
+ b->bud = bud;
+ b->sqnum = sqnum;
+ list_add_tail(&b->list, &c->replay_buds);
+
+ return 0;
+}
+
+/**
+ * validate_ref - validate a reference node.
+ * @c: UBIFS file-system description object
+ * @ref: the reference node to validate
+ * @ref_lnum: LEB number of the reference node
+ * @ref_offs: reference node offset
+ *
+ * This function returns %1 if a bud reference already exists for the LEB. %0 is
+ * returned if the reference node is new, otherwise %-EINVAL is returned if
+ * validation failed.
+ */
+static int validate_ref(struct ubifs_info *c, const struct ubifs_ref_node *ref)
+{
+ struct ubifs_bud *bud;
+ int lnum = le32_to_cpu(ref->lnum);
+ unsigned int offs = le32_to_cpu(ref->offs);
+ unsigned int jhead = le32_to_cpu(ref->jhead);
+
+ /*
+ * ref->offs may point to the end of LEB when the journal head points
+ * to the end of LEB and we write reference node for it during commit.
+ * So this is why we require 'offs > c->leb_size'.
+ */
+ if (jhead >= c->jhead_cnt || lnum >= c->leb_cnt ||
+ lnum < c->main_first || offs > c->leb_size ||
+ offs & (c->min_io_size - 1))
+ return -EINVAL;
+
+ /* Make sure we have not already looked at this bud */
+ bud = ubifs_search_bud(c, lnum);
+ if (bud) {
+ if (bud->jhead == jhead && bud->start <= offs)
+ return 1;
+ ubifs_err("bud at LEB %d:%d was already referred", lnum, offs);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/**
+ * replay_log_leb - replay a log logical eraseblock.
+ * @c: UBIFS file-system description object
+ * @lnum: log logical eraseblock to replay
+ * @offs: offset to start replaying from
+ * @sbuf: scan buffer
+ *
+ * This function replays a log LEB and returns zero in case of success, %1 if
+ * this is the last LEB in the log, and a negative error code in case of
+ * failure.
+ */
+static int replay_log_leb(struct ubifs_info *c, int lnum, int offs, void *sbuf)
+{
+ int err;
+ struct ubifs_scan_leb *sleb;
+ struct ubifs_scan_node *snod;
+ const struct ubifs_cs_node *node;
+
+ dbg_mnt("replay log LEB %d:%d", lnum, offs);
+ sleb = ubifs_scan(c, lnum, offs, sbuf);
+ if (IS_ERR(sleb)) {
+ if (c->need_recovery)
+ sleb = ubifs_recover_log_leb(c, lnum, offs, sbuf);
+ if (IS_ERR(sleb))
+ return PTR_ERR(sleb);
+ }
+
+ if (sleb->nodes_cnt == 0) {
+ err = 1;
+ goto out;
+ }
+
+ node = sleb->buf;
+
+ snod = list_entry(sleb->nodes.next, struct ubifs_scan_node, list);
+ if (c->cs_sqnum == 0) {
+ /*
+ * This is the first log LEB we are looking at, make sure that
+ * the first node is a commit start node. Also record its
+ * sequence number so that UBIFS can determine where the log
+ * ends, because all nodes which were have higher sequence
+ * numbers.
+ */
+ if (snod->type != UBIFS_CS_NODE) {
+ dbg_err("first log node at LEB %d:%d is not CS node",
+ lnum, offs);
+ goto out_dump;
+ }
+ if (le64_to_cpu(node->cmt_no) != c->cmt_no) {
+ dbg_err("first CS node at LEB %d:%d has wrong "
+ "commit number %llu expected %llu",
+ lnum, offs,
+ (unsigned long long)le64_to_cpu(node->cmt_no),
+ c->cmt_no);
+ goto out_dump;
+ }
+
+ c->cs_sqnum = le64_to_cpu(node->ch.sqnum);
+ dbg_mnt("commit start sqnum %llu", c->cs_sqnum);
+ }
+
+ if (snod->sqnum < c->cs_sqnum) {
+ /*
+ * This means that we reached end of log and now
+ * look to the older log data, which was already
+ * committed but the eraseblock was not erased (UBIFS
+ * only unmaps it). So this basically means we have to
+ * exit with "end of log" code.
+ */
+ err = 1;
+ goto out;
+ }
+
+ /* Make sure the first node sits at offset zero of the LEB */
+ if (snod->offs != 0) {
+ dbg_err("first node is not at zero offset");
+ goto out_dump;
+ }
+
+ list_for_each_entry(snod, &sleb->nodes, list) {
+
+ cond_resched();
+
+ if (snod->sqnum >= SQNUM_WATERMARK) {
+ ubifs_err("file system's life ended");
+ goto out_dump;
+ }
+
+ if (snod->sqnum < c->cs_sqnum) {
+ dbg_err("bad sqnum %llu, commit sqnum %llu",
+ snod->sqnum, c->cs_sqnum);
+ goto out_dump;
+ }
+
+ if (snod->sqnum > c->max_sqnum)
+ c->max_sqnum = snod->sqnum;
+
+ switch (snod->type) {
+ case UBIFS_REF_NODE: {
+ const struct ubifs_ref_node *ref = snod->node;
+
+ err = validate_ref(c, ref);
+ if (err == 1)
+ break; /* Already have this bud */
+ if (err)
+ goto out_dump;
+
+ err = add_replay_bud(c, le32_to_cpu(ref->lnum),
+ le32_to_cpu(ref->offs),
+ le32_to_cpu(ref->jhead),
+ snod->sqnum);
+ if (err)
+ goto out;
+
+ break;
+ }
+ case UBIFS_CS_NODE:
+ /* Make sure it sits at the beginning of LEB */
+ if (snod->offs != 0) {
+ ubifs_err("unexpected node in log");
+ goto out_dump;
+ }
+ break;
+ default:
+ ubifs_err("unexpected node in log");
+ goto out_dump;
+ }
+ }
+
+ if (sleb->endpt || c->lhead_offs >= c->leb_size) {
+ c->lhead_lnum = lnum;
+ c->lhead_offs = sleb->endpt;
+ }
+
+ err = !sleb->endpt;
+out:
+ ubifs_scan_destroy(sleb);
+ return err;
+
+out_dump:
+ ubifs_err("log error detected while replying the log at LEB %d:%d",
+ lnum, offs + snod->offs);
+ dbg_dump_node(c, snod->node);
+ ubifs_scan_destroy(sleb);
+ return -EINVAL;
+}
+
+/**
+ * take_ihead - update the status of the index head in lprops to 'taken'.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns the amount of free space in the index head LEB or a
+ * negative error code.
+ */
+static int take_ihead(struct ubifs_info *c)
+{
+ const struct ubifs_lprops *lp;
+ int err, free;
+
+ ubifs_get_lprops(c);
+
+ lp = ubifs_lpt_lookup_dirty(c, c->ihead_lnum);
+ if (IS_ERR(lp)) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+
+ free = lp->free;
+
+ lp = ubifs_change_lp(c, lp, LPROPS_NC, LPROPS_NC,
+ lp->flags | LPROPS_TAKEN, 0);
+ if (IS_ERR(lp)) {
+ err = PTR_ERR(lp);
+ goto out;
+ }
+
+ err = free;
+out:
+ ubifs_release_lprops(c);
+ return err;
+}
+
+/**
+ * ubifs_replay_journal - replay journal.
+ * @c: UBIFS file-system description object
+ *
+ * This function scans the journal, replays and cleans it up. It makes sure all
+ * memory data structures related to uncommitted journal are built (dirty TNC
+ * tree, tree of buds, modified lprops, etc).
+ */
+int ubifs_replay_journal(struct ubifs_info *c)
+{
+ int err, i, lnum, offs, free;
+ void *sbuf = NULL;
+
+ BUILD_BUG_ON(UBIFS_TRUN_KEY > 5);
+
+ /* Update the status of the index head in lprops to 'taken' */
+ free = take_ihead(c);
+ if (free < 0)
+ return free; /* Error code */
+
+ if (c->ihead_offs != c->leb_size - free) {
+ ubifs_err("bad index head LEB %d:%d", c->ihead_lnum,
+ c->ihead_offs);
+ return -EINVAL;
+ }
+
+ sbuf = vmalloc(c->leb_size);
+ if (!sbuf)
+ return -ENOMEM;
+
+ dbg_mnt("start replaying the journal");
+
+ c->replaying = 1;
+
+ lnum = c->ltail_lnum = c->lhead_lnum;
+ offs = c->lhead_offs;
+
+ for (i = 0; i < c->log_lebs; i++, lnum++) {
+ if (lnum >= UBIFS_LOG_LNUM + c->log_lebs) {
+ /*
+ * The log is logically circular, we reached the last
+ * LEB, switch to the first one.
+ */
+ lnum = UBIFS_LOG_LNUM;
+ offs = 0;
+ }
+ err = replay_log_leb(c, lnum, offs, sbuf);
+ if (err == 1)
+ /* We hit the end of the log */
+ break;
+ if (err)
+ goto out;
+ offs = 0;
+ }
+
+ err = replay_buds(c);
+ if (err)
+ goto out;
+
+ err = apply_replay_tree(c);
+ if (err)
+ goto out;
+
+ ubifs_assert(c->bud_bytes <= c->max_bud_bytes || c->need_recovery);
+ dbg_mnt("finished, log head LEB %d:%d, max_sqnum %llu, "
+ "highest_inum %lu", c->lhead_lnum, c->lhead_offs, c->max_sqnum,
+ c->highest_inum);
+out:
+ destroy_replay_tree(c);
+ destroy_bud_list(c);
+ vfree(sbuf);
+ c->replaying = 0;
+ return err;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/sb.c avr32-2.6/fs/ubifs/sb.c
--- linux-2.6.25.6/fs/ubifs/sb.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/sb.c 2008-06-12 15:09:45.515816461 +0200
@@ -0,0 +1,618 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file implements UBIFS superblock. The superblock is stored at the first
+ * LEB of the volume and is never changed by UBIFS. Only user-space tools may
+ * change it. The superblock node mostly contains geometry information.
+ */
+
+#include "ubifs.h"
+#include <linux/random.h>
+
+/*
+ * Default journal size in logical eraseblocks as a percent of total
+ * flash size.
+ */
+#define DEFAULT_JNL_PERCENT 5
+
+/* Default maximum journal size in bytes */
+#define DEFAULT_MAX_JNL (32*1024*1024)
+
+/* Default indexing tree fanout */
+#define DEFAULT_FANOUT 8
+
+/* Default number of LEBs for orphan information */
+#ifdef CONFIG_UBIFS_FS_DEBUG
+#define DEFAULT_ORPHAN_LEBS 2 /* 2 is better for testing */
+#else
+#define DEFAULT_ORPHAN_LEBS 1
+#endif
+
+/* Default number of journal heads */
+#define DEFAULT_JHEADS_CNT 1
+
+/* Default positions of different LEBs in the main area */
+#define DEFAULT_IDX_LEB 0
+#define DEFAULT_DATA_LEB 1
+#define DEFAULT_GC_LEB 2
+
+/* Default number of LEB numbers in LPT's save table */
+#define DEFAULT_LSAVE_CNT 256
+
+/* Default reserved pool size as a percent of maximum free space */
+#define DEFAULT_RP_PERCENT 5
+
+/* The default maximum size of reserved pool in bytes */
+#define DEFAULT_MAX_RP_SIZE (5*1024*1024)
+
+/* Default UBIFS compressor */
+#define DEFAULT_COMPRESSOR UBIFS_COMPR_LZO
+
+/* Default time granularity in nanoseconds */
+#define DEFAULT_TIME_GRAN 1000000000
+
+/**
+ * create_default_filesystem - format empty UBI volume.
+ * @c: UBIFS file-system description object
+ *
+ * This function creates default empty file-system. Returns zero in case of
+ * success and a negative error code in case of failure.
+ */
+static int create_default_filesystem(struct ubifs_info *c)
+{
+ struct ubifs_sb_node *sup;
+ struct ubifs_mst_node *mst;
+ struct ubifs_idx_node *idx;
+ struct ubifs_branch *br;
+ struct ubifs_ino_node *ino;
+ struct ubifs_cs_node *cs;
+ union ubifs_key key;
+ int err, tmp, jnl_lebs, log_lebs, max_buds, main_lebs, main_first;
+ int lpt_lebs, lpt_first, orph_lebs, big_lpt, ino_waste, sup_flags = 0;
+ uint64_t tmp64, main_bytes;
+
+ /* Some functions called from here depend on the @c->key_len filed */
+ c->key_len = UBIFS_SK_LEN;
+
+ /*
+ * First of all, we have to calculate default file-system geometry -
+ * log size, journal size, etc.
+ */
+ c->max_leb_cnt = c->leb_cnt;
+ if (c->leb_cnt < 0x7FFFFFFF / DEFAULT_JNL_PERCENT)
+ /* We can first multiply then divide and have no overflow */
+ jnl_lebs = c->leb_cnt * DEFAULT_JNL_PERCENT / 100;
+ else
+ jnl_lebs = (c->leb_cnt / 100) * DEFAULT_JNL_PERCENT;
+
+ if (jnl_lebs < UBIFS_MIN_JNL_LEBS)
+ jnl_lebs = UBIFS_MIN_JNL_LEBS;
+ if (jnl_lebs * c->leb_size > DEFAULT_MAX_JNL)
+ jnl_lebs = DEFAULT_MAX_JNL / c->leb_size;
+
+ /*
+ * The log should be large enough to fit reference nodes for all bud
+ * LEBs. Because buds do not have to start from the beginning of LEBs
+ * (half of the LEB may contain committed data), the log should
+ * generally be larger, make it twice as large.
+ */
+ tmp = 2 * (c->ref_node_alsz * jnl_lebs) + c->leb_size - 1;
+ log_lebs = tmp / c->leb_size;
+ /* Plus one LEB reserved for commit */
+ log_lebs += 1;
+ /* And some extra space to allow writes while committing */
+ log_lebs += 1;
+
+ max_buds = jnl_lebs - log_lebs;
+ if (max_buds < UBIFS_MIN_BUD_LEBS)
+ max_buds = UBIFS_MIN_BUD_LEBS;
+
+ /*
+ * Orphan nodes are stored in a separate area. One node can store a lot
+ * of orphan inode numbers, but when new orphan comes we just add a new
+ * orphan node. At some point the nodes are consolidated into one
+ * orphan node.
+ */
+ orph_lebs = DEFAULT_ORPHAN_LEBS;
+
+ main_lebs = c->leb_cnt - UBIFS_SB_LEBS - UBIFS_MST_LEBS - log_lebs;
+ main_lebs -= orph_lebs;
+
+ lpt_first = UBIFS_LOG_LNUM + log_lebs;
+ c->lsave_cnt = DEFAULT_LSAVE_CNT;
+ err = ubifs_create_dflt_lpt(c, &main_lebs, lpt_first, &lpt_lebs,
+ &big_lpt);
+ if (err)
+ return err;
+
+ dbg_gen("LEB Properties Tree created (LEBs %d-%d)", lpt_first,
+ lpt_first + lpt_lebs - 1);
+
+ main_first = c->leb_cnt - main_lebs;
+
+ /* Create default superblock */
+ tmp = ALIGN(UBIFS_SB_NODE_SZ, c->min_io_size);
+ sup = kzalloc(tmp, GFP_KERNEL);
+ if (!sup)
+ return -ENOMEM;
+
+ tmp64 = (uint64_t)max_buds * c->leb_size;
+ if (big_lpt)
+ sup_flags |= UBIFS_FLG_BIGLPT;
+
+ sup->ch.node_type = UBIFS_SB_NODE;
+ sup->key_hash = UBIFS_KEY_HASH_R5;
+ sup->flags = cpu_to_le32(sup_flags);
+ sup->min_io_size = cpu_to_le32(c->min_io_size);
+ sup->leb_size = cpu_to_le32(c->leb_size);
+ sup->leb_cnt = cpu_to_le32(c->leb_cnt);
+ sup->max_leb_cnt = cpu_to_le32(c->max_leb_cnt);
+ sup->max_bud_bytes = cpu_to_le64(tmp64);
+ sup->log_lebs = cpu_to_le32(log_lebs);
+ sup->lpt_lebs = cpu_to_le32(lpt_lebs);
+ sup->orph_lebs = cpu_to_le32(orph_lebs);
+ sup->jhead_cnt = cpu_to_le32(DEFAULT_JHEADS_CNT);
+ sup->fanout = cpu_to_le32(DEFAULT_FANOUT);
+ sup->lsave_cnt = cpu_to_le32(c->lsave_cnt);
+ sup->fmt_version = cpu_to_le32(UBIFS_FORMAT_VERSION);
+ sup->default_compr = cpu_to_le16(DEFAULT_COMPRESSOR);
+ sup->time_gran = cpu_to_le32(DEFAULT_TIME_GRAN);
+
+ generate_random_uuid(sup->uuid);
+
+ main_bytes = (uint64_t)main_lebs * c->leb_size;
+ tmp64 = main_bytes * DEFAULT_RP_PERCENT;
+ do_div(tmp64, 100);
+ if (tmp64 > DEFAULT_MAX_RP_SIZE)
+ tmp64 = DEFAULT_MAX_RP_SIZE;
+ sup->rp_size = cpu_to_le64(tmp64);
+
+ err = ubifs_write_node(c, sup, UBIFS_SB_NODE_SZ, 0, 0, UBI_LONGTERM);
+ kfree(sup);
+ if (err)
+ return err;
+
+ dbg_gen("default superblock created at LEB 0:0");
+
+ /* Create default master node */
+ mst = kzalloc(c->mst_node_alsz, GFP_KERNEL);
+ if (!mst)
+ return -ENOMEM;
+
+ mst->ch.node_type = UBIFS_MST_NODE;
+ mst->log_lnum = cpu_to_le32(UBIFS_LOG_LNUM);
+ mst->highest_inum = cpu_to_le64(UBIFS_FIRST_INO);
+ mst->cmt_no = 0;
+ mst->root_lnum = cpu_to_le32(main_first + DEFAULT_IDX_LEB);
+ mst->root_offs = 0;
+ tmp = ubifs_idx_node_sz(c, 1);
+ mst->root_len = cpu_to_le32(tmp);
+ mst->gc_lnum = cpu_to_le32(main_first + DEFAULT_GC_LEB);
+ mst->ihead_lnum = cpu_to_le32(main_first + DEFAULT_IDX_LEB);
+ mst->ihead_offs = cpu_to_le32(ALIGN(tmp, c->min_io_size));
+ mst->index_size = cpu_to_le64(ALIGN(tmp, 8));
+ mst->lpt_lnum = cpu_to_le32(c->lpt_lnum);
+ mst->lpt_offs = cpu_to_le32(c->lpt_offs);
+ mst->nhead_lnum = cpu_to_le32(c->nhead_lnum);
+ mst->nhead_offs = cpu_to_le32(c->nhead_offs);
+ mst->ltab_lnum = cpu_to_le32(c->ltab_lnum);
+ mst->ltab_offs = cpu_to_le32(c->ltab_offs);
+ mst->lsave_lnum = cpu_to_le32(c->lsave_lnum);
+ mst->lsave_offs = cpu_to_le32(c->lsave_offs);
+ mst->lscan_lnum = cpu_to_le32(main_first);
+ mst->empty_lebs = cpu_to_le32(main_lebs - 2);
+ mst->idx_lebs = cpu_to_le32(1);
+ mst->leb_cnt = cpu_to_le32(c->leb_cnt);
+
+ /* Calculate lprops statistics */
+ tmp64 = main_bytes;
+ tmp64 -= ALIGN(ubifs_idx_node_sz(c, 1), c->min_io_size);
+ tmp64 -= ALIGN(UBIFS_INO_NODE_SZ, c->min_io_size);
+ mst->total_free = cpu_to_le64(tmp64);
+
+ tmp64 = ALIGN(ubifs_idx_node_sz(c, 1), c->min_io_size);
+ ino_waste = ALIGN(UBIFS_INO_NODE_SZ, c->min_io_size) -
+ UBIFS_INO_NODE_SZ;
+ tmp64 += ino_waste;
+ tmp64 -= ALIGN(ubifs_idx_node_sz(c, 1), 8);
+ mst->total_dirty = cpu_to_le64(tmp64);
+
+ /* The indexing LEB does not contribute to dark space */
+ tmp64 = (c->main_lebs - 1) * c->dark_wm;
+ mst->total_dark = cpu_to_le64(tmp64);
+
+ mst->total_used = cpu_to_le64(UBIFS_INO_NODE_SZ);
+
+ err = ubifs_write_node(c, mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM, 0,
+ UBI_UNKNOWN);
+ if (err) {
+ kfree(mst);
+ return err;
+ }
+ err = ubifs_write_node(c, mst, UBIFS_MST_NODE_SZ, UBIFS_MST_LNUM + 1, 0,
+ UBI_UNKNOWN);
+ kfree(mst);
+ if (err)
+ return err;
+
+ dbg_gen("default master node created at LEB %d:0", UBIFS_MST_LNUM);
+
+ /* Create the root indexing node */
+ tmp = ubifs_idx_node_sz(c, 1);
+ idx = kzalloc(ALIGN(tmp, c->min_io_size), GFP_KERNEL);
+ if (!idx)
+ return -ENOMEM;
+
+ c->key_fmt = UBIFS_SIMPLE_KEY_FMT;
+ c->key_hash = key_r5_hash;
+
+ idx->ch.node_type = UBIFS_IDX_NODE;
+ idx->child_cnt = cpu_to_le16(1);
+ ino_key_init(c, &key, UBIFS_ROOT_INO);
+ br = ubifs_idx_branch(c, idx, 0);
+ key_write_idx(c, &key, &br->key);
+ br->lnum = cpu_to_le32(main_first + DEFAULT_DATA_LEB);
+ br->len = cpu_to_le32(UBIFS_INO_NODE_SZ);
+ err = ubifs_write_node(c, idx, tmp, main_first + DEFAULT_IDX_LEB, 0,
+ UBI_UNKNOWN);
+ kfree(idx);
+ if (err)
+ return err;
+
+ dbg_gen("default root indexing node created LEB %d:0",
+ main_first + DEFAULT_IDX_LEB);
+
+ /* Create default root inode */
+ tmp = ALIGN(UBIFS_INO_NODE_SZ, c->min_io_size);
+ ino = kzalloc(tmp, GFP_KERNEL);
+ if (!ino)
+ return -ENOMEM;
+
+ ino_key_init_flash(c, &ino->key, UBIFS_ROOT_INO);
+ ino->ch.node_type = UBIFS_INO_NODE;
+ ino->creat_sqnum = cpu_to_le64(++c->max_sqnum);
+ ino->nlink = cpu_to_le32(2);
+ tmp = cpu_to_le64(CURRENT_TIME_SEC.tv_sec);
+ ino->atime_sec = tmp;
+ ino->ctime_sec = tmp;
+ ino->mtime_sec = tmp;
+ ino->atime_nsec = 0;
+ ino->ctime_nsec = 0;
+ ino->mtime_nsec = 0;
+ ino->mode = cpu_to_le32(S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO);
+ ino->size = cpu_to_le64(UBIFS_INO_NODE_SZ);
+
+ /* Set compression enabled by default */
+ ino->flags = cpu_to_le32(UBIFS_COMPR_FL);
+
+ err = ubifs_write_node(c, ino, UBIFS_INO_NODE_SZ,
+ main_first + DEFAULT_DATA_LEB, 0,
+ UBI_UNKNOWN);
+ kfree(ino);
+ if (err)
+ return err;
+
+ dbg_gen("root inode created at LEB %d:0",
+ main_first + DEFAULT_DATA_LEB);
+
+ /*
+ * The first node in the log has to be the commit start node. This is
+ * always the case during normal file-system operation. Write a fake
+ * commit start node to the log.
+ */
+ tmp = ALIGN(UBIFS_CS_NODE_SZ, c->min_io_size);
+ cs = kzalloc(tmp, GFP_KERNEL);
+ if (!cs)
+ return -ENOMEM;
+
+ cs->ch.node_type = UBIFS_CS_NODE;
+ err = ubifs_write_node(c, cs, UBIFS_CS_NODE_SZ, UBIFS_LOG_LNUM,
+ 0, UBI_UNKNOWN);
+ kfree(cs);
+
+ ubifs_msg("default file-system created");
+ return 0;
+}
+
+/**
+ * validate_sb - validate superblock node.
+ * @c: UBIFS file-system description object
+ * @sup: superblock node
+ *
+ * This function validates superblock node @sup. Since most of data was read
+ * from the superblock and stored in @c, the function validates fields in @c
+ * instead. Returns zero in case of success and %-EINVAL in case of validation
+ * failure.
+ */
+static int validate_sb(struct ubifs_info *c, struct ubifs_sb_node *sup)
+{
+ long long max_bytes;
+ int err = 1;
+
+ if (!c->key_hash) {
+ err = 2;
+ goto failed;
+ }
+
+ if (sup->key_fmt != UBIFS_SIMPLE_KEY_FMT) {
+ err = 3;
+ goto failed;
+ }
+
+ if (le32_to_cpu(sup->min_io_size) != c->min_io_size) {
+ ubifs_err("min. I/O unit mismatch: %d in superblock, %d real",
+ le32_to_cpu(sup->min_io_size), c->min_io_size);
+ goto failed;
+ }
+
+ if (le32_to_cpu(sup->leb_size) != c->leb_size) {
+ ubifs_err("LEB size mismatch: %d in superblock, %d real",
+ le32_to_cpu(sup->leb_size), c->leb_size);
+ goto failed;
+ }
+
+ if (c->leb_cnt < UBIFS_MIN_LEB_CNT || c->leb_cnt > c->vi.size) {
+ ubifs_err("bad LEB count: %d in superblock, %d on UBI volume, "
+ "%d minimum required", c->leb_cnt, c->vi.size,
+ UBIFS_MIN_LEB_CNT);
+ goto failed;
+ }
+
+ if (c->max_leb_cnt < c->leb_cnt) {
+ ubifs_err("max. LEB count %d less than LEB count %d",
+ c->max_leb_cnt, c->leb_cnt);
+ goto failed;
+ }
+
+ if (c->log_lebs < UBIFS_MIN_LOG_LEBS ||
+ c->lpt_lebs < UBIFS_MIN_LPT_LEBS ||
+ c->orph_lebs < UBIFS_MIN_ORPH_LEBS ||
+ c->main_lebs < UBIFS_MIN_MAIN_LEBS) {
+ err = 6;
+ goto failed;
+ }
+
+ if (c->main_lebs < UBIFS_MIN_MAIN_LEBS) {
+ err = 7;
+ goto failed;
+ }
+
+ if (c->max_bud_bytes < (long long)c->leb_size * UBIFS_MIN_BUD_LEBS ||
+ c->max_bud_bytes > (long long)c->leb_size * c->main_lebs) {
+ err = 8;
+ goto failed;
+ }
+
+ if (c->jhead_cnt < NONDATA_JHEADS_CNT + 1 ||
+ c->jhead_cnt > NONDATA_JHEADS_CNT + UBIFS_MAX_JHEADS) {
+ err = 9;
+ goto failed;
+ }
+
+ if (c->fanout < UBIFS_MIN_FANOUT ||
+ ubifs_idx_node_sz(c, c->fanout) > c->leb_size) {
+ err = 10;
+ goto failed;
+ }
+
+ if (c->lsave_cnt < 0 || (c->lsave_cnt > DEFAULT_LSAVE_CNT &&
+ c->lsave_cnt > c->max_leb_cnt - UBIFS_SB_LEBS - UBIFS_MST_LEBS -
+ c->log_lebs - c->lpt_lebs - c->orph_lebs)) {
+ err = 11;
+ goto failed;
+ }
+
+ if (UBIFS_SB_LEBS + UBIFS_MST_LEBS + c->log_lebs + c->lpt_lebs +
+ c->orph_lebs + c->main_lebs != c->leb_cnt) {
+ err = 12;
+ goto failed;
+ }
+
+ if (c->default_compr < 0 || c->default_compr >= UBIFS_COMPR_TYPES_CNT) {
+ err = 13;
+ goto failed;
+ }
+
+ max_bytes = c->main_lebs * (long long)c->leb_size;
+ if (c->rp_size < 0 || max_bytes < c->rp_size) {
+ err = 14;
+ goto failed;
+ }
+
+ if (le32_to_cpu(sup->time_gran) > 1000000000 ||
+ le32_to_cpu(sup->time_gran) < 1) {
+ err = 15;
+ goto failed;
+ }
+
+ return 0;
+
+failed:
+ ubifs_err("bad superblock, error %d", err);
+ dbg_dump_node(c, sup);
+ return -EINVAL;
+}
+
+/**
+ * ubifs_read_sb_node - read superblock node.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns a pointer to the superblock node or a negative error
+ * code.
+ */
+struct ubifs_sb_node *ubifs_read_sb_node(struct ubifs_info *c)
+{
+ struct ubifs_sb_node *sup;
+ int err;
+
+ sup = kmalloc(ALIGN(UBIFS_SB_NODE_SZ, c->min_io_size), GFP_NOFS);
+ if (!sup)
+ return ERR_PTR(-ENOMEM);
+
+ err = ubifs_read_node(c, sup, UBIFS_SB_NODE, UBIFS_SB_NODE_SZ,
+ UBIFS_SB_LNUM, 0);
+ if (err) {
+ kfree(sup);
+ return ERR_PTR(err);
+ }
+
+ return sup;
+}
+
+/**
+ * ubifs_write_sb_node - write superblock node.
+ * @c: UBIFS file-system description object
+ * @sup: superblock node read with 'ubifs_read_sb_node()'
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_write_sb_node(struct ubifs_info *c, struct ubifs_sb_node *sup)
+{
+ int len = ALIGN(UBIFS_SB_NODE_SZ, c->min_io_size);
+
+ ubifs_prepare_node(c, sup, UBIFS_SB_NODE_SZ, 1);
+ return ubi_leb_change(c->ubi, UBIFS_SB_LNUM, sup, len, UBI_LONGTERM);
+}
+
+/**
+ * ubifs_read_superblock - read superblock.
+ * @c: UBIFS file-system description object
+ *
+ * This function finds, reads and checks the superblock. If an empty UBI volume
+ * is being mounted, this function creates default superblock. Returns zero in
+ * case of success, and a negative error code in case of failure.
+ */
+int ubifs_read_superblock(struct ubifs_info *c)
+{
+ int err, sup_flags;
+ struct ubifs_sb_node *sup;
+
+ if (c->empty) {
+ err = create_default_filesystem(c);
+ if (err)
+ return err;
+ }
+
+ sup = ubifs_read_sb_node(c);
+ if (IS_ERR(sup))
+ return PTR_ERR(sup);
+
+ /*
+ * The software supports all previous versions but not future versions,
+ * due to the unavailability of time-travelling equipment.
+ */
+ c->fmt_version = le32_to_cpu(sup->fmt_version);
+ if (c->fmt_version > UBIFS_FORMAT_VERSION) {
+ ubifs_err("on-flash format version is %d, but software only "
+ "supports up to version %d", c->fmt_version,
+ UBIFS_FORMAT_VERSION);
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (c->fmt_version < 3) {
+ ubifs_err("on-flash format version %d is not supported",
+ c->fmt_version);
+ err = -EINVAL;
+ goto out;
+ }
+
+ switch (sup->key_hash) {
+ case UBIFS_KEY_HASH_R5:
+ c->key_hash = key_r5_hash;
+ c->key_hash_type = UBIFS_KEY_HASH_R5;
+ break;
+
+ case UBIFS_KEY_HASH_TEST:
+ c->key_hash = key_test_hash;
+ c->key_hash_type = UBIFS_KEY_HASH_TEST;
+ break;
+ };
+
+ c->key_fmt = sup->key_fmt;
+
+ switch (c->key_fmt) {
+ case UBIFS_SIMPLE_KEY_FMT:
+ c->key_len = UBIFS_SK_LEN;
+ break;
+ default:
+ ubifs_err("unsupported key format");
+ err = -EINVAL;
+ goto out;
+ }
+
+ c->leb_cnt = le32_to_cpu(sup->leb_cnt);
+ c->max_leb_cnt = le32_to_cpu(sup->max_leb_cnt);
+ c->max_bud_bytes = le64_to_cpu(sup->max_bud_bytes);
+ c->log_lebs = le32_to_cpu(sup->log_lebs);
+ c->lpt_lebs = le32_to_cpu(sup->lpt_lebs);
+ c->orph_lebs = le32_to_cpu(sup->orph_lebs);
+ c->jhead_cnt = le32_to_cpu(sup->jhead_cnt) + NONDATA_JHEADS_CNT;
+ c->fanout = le32_to_cpu(sup->fanout);
+ c->lsave_cnt = le32_to_cpu(sup->lsave_cnt);
+ c->default_compr = le16_to_cpu(sup->default_compr);
+ c->rp_size = le64_to_cpu(sup->rp_size);
+ c->rp_uid = le32_to_cpu(sup->rp_uid);
+ c->rp_gid = le32_to_cpu(sup->rp_gid);
+ sup_flags = le32_to_cpu(sup->flags);
+
+ c->vfs_sb->s_time_gran = le32_to_cpu(sup->time_gran);
+
+ memcpy(&c->uuid, &sup->uuid, 16);
+
+ c->big_lpt = !!(sup_flags & UBIFS_FLG_BIGLPT);
+
+ /* Automatically increase file system size to the maximum size */
+ c->old_leb_cnt = c->leb_cnt;
+ if (c->leb_cnt < c->vi.size && c->leb_cnt < c->max_leb_cnt) {
+ c->leb_cnt = min_t(int, c->max_leb_cnt, c->vi.size);
+ if (c->vfs_sb->s_flags & MS_RDONLY)
+ dbg_mnt("Auto resizing (ro) from %d LEBs to %d LEBs",
+ c->old_leb_cnt, c->leb_cnt);
+ else {
+ dbg_mnt("Auto resizing (sb) from %d LEBs to %d LEBs",
+ c->old_leb_cnt, c->leb_cnt);
+ sup->leb_cnt = cpu_to_le32(c->leb_cnt);
+ err = ubifs_write_sb_node(c, sup);
+ if (err)
+ goto out;
+ c->old_leb_cnt = c->leb_cnt;
+ }
+ }
+
+ c->log_bytes = (long long)c->log_lebs * c->leb_size;
+ c->log_last = UBIFS_LOG_LNUM + c->log_lebs - 1;
+ c->lpt_first = UBIFS_LOG_LNUM + c->log_lebs;
+ c->lpt_last = c->lpt_first + c->lpt_lebs - 1;
+ c->orph_first = c->lpt_last + 1;
+ c->orph_last = c->orph_first + c->orph_lebs - 1;
+ c->main_lebs = c->leb_cnt - UBIFS_SB_LEBS - UBIFS_MST_LEBS;
+ c->main_lebs -= c->log_lebs + c->lpt_lebs + c->orph_lebs;
+ c->main_first = c->leb_cnt - c->main_lebs;
+ c->report_rp_size = ubifs_reported_space(c, c->rp_size);
+
+ err = validate_sb(c, sup);
+out:
+ kfree(sup);
+ return err;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/scan.c avr32-2.6/fs/ubifs/scan.c
--- linux-2.6.25.6/fs/ubifs/scan.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/scan.c 2008-06-12 15:09:45.515816461 +0200
@@ -0,0 +1,362 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file implements the scan which is a general-purpose function for
+ * determining what nodes are in an eraseblock. The scan is used to replay the
+ * journal, to do garbage collection. for the TNC in-the-gaps method, and by
+ * debugging functions.
+ */
+
+#include "ubifs.h"
+
+/**
+ * scan_padding_bytes - scan for padding bytes.
+ * @buf: buffer to scan
+ * @len: length of buffer
+ *
+ * This function returns the number of padding bytes on success and
+ * %SCANNED_GARBAGE on failure.
+ */
+static int scan_padding_bytes(void *buf, int len)
+{
+ int pad_len = 0, max_pad_len = min_t(int, UBIFS_PAD_NODE_SZ, len);
+ uint8_t *p = buf;
+
+ dbg_scan("not a node");
+
+ while (pad_len < max_pad_len && *p++ == UBIFS_PADDING_BYTE)
+ pad_len += 1;
+
+ if (!pad_len || (pad_len & 7))
+ return SCANNED_GARBAGE;
+
+ dbg_scan("%d padding bytes", pad_len);
+
+ return pad_len;
+}
+
+/**
+ * ubifs_scan_a_node - scan for a node or padding.
+ * @c: UBIFS file-system description object
+ * @buf: buffer to scan
+ * @len: length of buffer
+ * @lnum: logical eraseblock number
+ * @offs: offset within the logical eraseblock
+ * @quiet: print no messages
+ *
+ * This function returns a scanning code to indicate what was scanned.
+ */
+int ubifs_scan_a_node(const struct ubifs_info *c, void *buf, int len, int lnum,
+ int offs, int quiet)
+{
+ struct ubifs_ch *ch = buf;
+ uint32_t magic;
+
+ magic = le32_to_cpu(ch->magic);
+
+ if (magic == 0xFFFFFFFF) {
+ dbg_scan("hit empty space");
+ return SCANNED_EMPTY_SPACE;
+ }
+
+ if (magic != UBIFS_NODE_MAGIC)
+ return scan_padding_bytes(buf, len);
+
+ if (len < UBIFS_CH_SZ)
+ return SCANNED_GARBAGE;
+
+ dbg_scan("scanning %s", dbg_ntype(ch->node_type));
+
+ if (ubifs_check_node(c, buf, lnum, offs, quiet))
+ return SCANNED_A_CORRUPT_NODE;
+
+ if (ch->node_type == UBIFS_PAD_NODE) {
+ struct ubifs_pad_node *pad = buf;
+ int pad_len = le32_to_cpu(pad->pad_len);
+ int node_len = le32_to_cpu(ch->len);
+
+ /* Validate the padding node */
+ if (pad_len < 0 ||
+ offs + node_len + pad_len > c->leb_size) {
+ if (!quiet) {
+ ubifs_err("bad pad node at LEB %d:%d",
+ lnum, offs);
+ dbg_dump_node(c, pad);
+ }
+ return SCANNED_A_BAD_PAD_NODE;
+ }
+
+ /* Make the node pads to 8-byte boundary */
+ if ((node_len + pad_len) & 7) {
+ if (!quiet) {
+ dbg_err("bad padding length %d - %d",
+ offs, offs + node_len + pad_len);
+ }
+ return SCANNED_A_BAD_PAD_NODE;
+ }
+
+ dbg_scan("%d bytes padded, offset now %d",
+ pad_len, ALIGN(offs + node_len + pad_len, 8));
+
+ return node_len + pad_len;
+ }
+
+ return SCANNED_A_NODE;
+}
+
+/**
+ * ubifs_start_scan - create LEB scanning information at start of scan.
+ * @c: UBIFS file-system description object
+ * @lnum: logical eraseblock number
+ * @offs: offset to start at (usually zero)
+ * @sbuf: scan buffer (must be c->leb_size)
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+struct ubifs_scan_leb *ubifs_start_scan(const struct ubifs_info *c, int lnum,
+ int offs, void *sbuf)
+{
+ struct ubifs_scan_leb *sleb;
+ int err;
+
+ dbg_scan("scan LEB %d:%d", lnum, offs);
+
+ sleb = kzalloc(sizeof(struct ubifs_scan_leb), GFP_NOFS);
+ if (!sleb)
+ return ERR_PTR(-ENOMEM);
+
+ sleb->lnum = lnum;
+ INIT_LIST_HEAD(&sleb->nodes);
+ sleb->buf = sbuf;
+
+ err = ubi_read(c->ubi, lnum, sbuf + offs, offs, c->leb_size - offs);
+ if (err && err != -EBADMSG) {
+ ubifs_err("cannot read %d bytes from LEB %d:%d,"
+ " error %d", c->leb_size - offs, lnum, offs, err);
+ kfree(sleb);
+ return ERR_PTR(err);
+ }
+
+ if (err == -EBADMSG)
+ sleb->ecc = 1;
+
+ return sleb;
+}
+
+/**
+ * ubifs_end_scan - update LEB scanning information at end of scan.
+ * @c: UBIFS file-system description object
+ * @sleb: scanning information
+ * @lnum: logical eraseblock number
+ * @offs: offset to start at (usually zero)
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+void ubifs_end_scan(const struct ubifs_info *c, struct ubifs_scan_leb *sleb,
+ int lnum, int offs)
+{
+ lnum = lnum;
+ dbg_scan("stop scanning LEB %d at offset %d", lnum, offs);
+ ubifs_assert(offs % c->min_io_size == 0);
+
+ sleb->endpt = ALIGN(offs, c->min_io_size);
+}
+
+/**
+ * ubifs_add_snod - add a scanned node to LEB scanning information.
+ * @c: UBIFS file-system description object
+ * @sleb: scanning information
+ * @buf: buffer containing node
+ * @offs: offset of node on flash
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+int ubifs_add_snod(const struct ubifs_info *c, struct ubifs_scan_leb *sleb,
+ void *buf, int offs)
+{
+ struct ubifs_ch *ch = buf;
+ struct ubifs_ino_node *ino = buf;
+ struct ubifs_scan_node *snod;
+
+ snod = kzalloc(sizeof(struct ubifs_scan_node), GFP_NOFS);
+ if (!snod)
+ return -ENOMEM;
+
+ snod->sqnum = le64_to_cpu(ch->sqnum);
+ snod->type = ch->node_type;
+ snod->offs = offs;
+ snod->len = le32_to_cpu(ch->len);
+ snod->node = buf;
+
+ switch (ch->node_type) {
+ case UBIFS_INO_NODE:
+ case UBIFS_DENT_NODE:
+ case UBIFS_XENT_NODE:
+ case UBIFS_DATA_NODE:
+ case UBIFS_TRUN_NODE:
+ /*
+ * The key is in the same place in all keyed
+ * nodes.
+ */
+ key_read(c, &ino->key, &snod->key);
+ break;
+ }
+ list_add_tail(&snod->list, &sleb->nodes);
+ sleb->nodes_cnt += 1;
+ return 0;
+}
+
+/**
+ * ubifs_scanned_corruption - print information after UBIFS scanned corruption.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number of corruption
+ * @offs: offset of corruption
+ * @buf: buffer containing corruption
+ */
+void ubifs_scanned_corruption(const struct ubifs_info *c, int lnum, int offs,
+ void *buf)
+{
+ int len;
+
+ ubifs_err("corrupted data at LEB %d:%d", lnum, offs);
+ if (dbg_failure_mode)
+ return;
+ len = c->leb_size - offs;
+ if (len > 4096)
+ len = 4096;
+ dbg_err("first %d bytes from LEB %d:%d", len, lnum, offs);
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 4, buf, len, 1);
+}
+
+/**
+ * ubifs_scan - scan a logical eraseblock.
+ * @c: UBIFS file-system description object
+ * @lnum: logical eraseblock number
+ * @offs: offset to start at (usually zero)
+ * @sbuf: scan buffer (must be c->leb_size)
+ *
+ * This function scans LEB number @lnum and returns complete information about
+ * its contents. Returns an error code in case of failure.
+ */
+struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
+ int offs, void *sbuf)
+{
+ void *buf = sbuf + offs;
+ int err, len = c->leb_size - offs;
+ struct ubifs_scan_leb *sleb;
+
+ sleb = ubifs_start_scan(c, lnum, offs, sbuf);
+ if (IS_ERR(sleb))
+ return sleb;
+
+ while (len >= 8) {
+ struct ubifs_ch *ch = buf;
+ int node_len, ret;
+
+ dbg_scan("look at LEB %d:%d (%d bytes left)",
+ lnum, offs, len);
+
+ cond_resched();
+
+ ret = ubifs_scan_a_node(c, buf, len, lnum, offs, 0);
+
+ if (ret > 0) {
+ /* Padding bytes or a valid padding node */
+ offs += ret;
+ buf += ret;
+ len -= ret;
+ continue;
+ }
+
+ if (ret == SCANNED_EMPTY_SPACE)
+ /* Empty space is checked later */
+ break;
+
+ switch (ret) {
+ case SCANNED_GARBAGE:
+ dbg_err("garbage");
+ goto corrupted;
+ case SCANNED_A_NODE:
+ break;
+ case SCANNED_A_CORRUPT_NODE:
+ case SCANNED_A_BAD_PAD_NODE:
+ dbg_err("bad node");
+ goto corrupted;
+ default:
+ dbg_err("unknown");
+ goto corrupted;
+ }
+
+ err = ubifs_add_snod(c, sleb, buf, offs);
+ if (err)
+ goto error;
+
+ node_len = ALIGN(le32_to_cpu(ch->len), 8);
+ offs += node_len;
+ buf += node_len;
+ len -= node_len;
+ }
+
+ if (offs % c->min_io_size)
+ goto corrupted;
+
+ ubifs_end_scan(c, sleb, lnum, offs);
+
+ for (; len > 4; offs += 4, buf = buf + 4, len -= 4)
+ if (*(uint32_t *)buf != 0xffffffff)
+ break;
+ for (; len; offs++, buf++, len--)
+ if (*(uint8_t *)buf != 0xff) {
+ ubifs_err("corrupt empty space at LEB %d:%d",
+ lnum, offs);
+ goto corrupted;
+ }
+
+ return sleb;
+
+corrupted:
+ ubifs_scanned_corruption(c, lnum, offs, buf);
+ err = -EUCLEAN;
+error:
+ ubifs_err("LEB %d scanning failed", lnum);
+ ubifs_scan_destroy(sleb);
+ return ERR_PTR(err);
+}
+
+/**
+ * ubifs_scan_destroy - destroy LEB scanning information.
+ * @sleb: scanning information to free
+ */
+void ubifs_scan_destroy(struct ubifs_scan_leb *sleb)
+{
+ struct ubifs_scan_node *node;
+ struct list_head *head;
+
+ head = &sleb->nodes;
+ while (!list_empty(head)) {
+ node = list_entry(head->next, struct ubifs_scan_node, list);
+ list_del(&node->list);
+ kfree(node);
+ }
+ kfree(sleb);
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/shrinker.c avr32-2.6/fs/ubifs/shrinker.c
--- linux-2.6.25.6/fs/ubifs/shrinker.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/shrinker.c 2008-06-12 15:09:45.515816461 +0200
@@ -0,0 +1,322 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file implements UBIFS shrinker which evicts clean znodes from the TNC
+ * tree when Linux VM needs more RAM.
+ *
+ * We do not implement any LRU lists to find oldest znodes to free because it
+ * would add additional overhead to the file system fast paths. So the shrinker
+ * just walks the TNC tree when searching for znodes to free.
+ *
+ * If the root of a TNC sub-tree is clean and old enough, then the children are
+ * also clean and old enough. So the shrinker walks the TNC in level order and
+ * dumps entire sub-trees.
+ *
+ * The age of znodes is just the time-stamp when they were last looked at.
+ * The current shrinker first tries to evict old znodes, then young ones.
+ *
+ * Since the shrinker is global, it has to protect against races with FS
+ * un-mounts, which is done by the 'ubifs_infos_lock' and 'c->umount_mutex'.
+ */
+
+#include "ubifs.h"
+
+/* List of all UBIFS file-system instances */
+LIST_HEAD(ubifs_infos);
+
+/*
+ * We number each shrinker run and record the number on the ubifs_info structure
+ * so that we can easily work out which ubifs_info structures have already been
+ * done by the current run.
+ */
+static unsigned int shrinker_run_no;
+
+/* Protects 'ubifs_infos' list */
+DEFINE_SPINLOCK(ubifs_infos_lock);
+
+/* Global clean znode counter (for all mounted UBIFS instances) */
+atomic_long_t ubifs_clean_zn_cnt;
+
+/**
+ * shrink_tnc - shrink TNC tree.
+ * @c: UBIFS file-system description object
+ * @nr: number of znodes to free
+ * @age: the age of znodes to free
+ * @contention: if any contention, this is set to %1
+ *
+ * This function traverses TNC tree and frees clean znodes. It does not free
+ * clean znodes which younger then @age. Returns number of freed znodes.
+ */
+static int shrink_tnc(struct ubifs_info *c, int nr, int age, int *contention)
+{
+ int total_freed = 0;
+ struct ubifs_znode *znode, *zprev;
+ int time = get_seconds();
+
+ ubifs_assert(mutex_is_locked(&c->umount_mutex));
+ ubifs_assert(mutex_is_locked(&c->tnc_mutex));
+
+ if (!c->zroot.znode || atomic_long_read(&c->clean_zn_cnt) == 0)
+ return 0;
+
+ /*
+ * Traverse the TNC tree in levelorder manner, so that it is possible
+ * to destroy large sub-trees. Indeed, if a znode is old, then all its
+ * children are older or of the same age.
+ *
+ * Note, we are holding 'c->tnc_mutex', so we do not have to lock the
+ * 'c->space_lock' when _reading_ 'c->clean_zn_cnt', because it is
+ * changed only when the 'c->tnc_mutex' is held.
+ */
+ zprev = NULL;
+ znode = ubifs_tnc_levelorder_next(c->zroot.znode, NULL);
+ while (znode && total_freed < nr &&
+ atomic_long_read(&c->clean_zn_cnt) > 0) {
+ int freed;
+
+ /*
+ * If the znode is clean, but it is in the 'c->cnext' list, this
+ * means that this znode has just been written to flash as a
+ * part of commit and was marked clean. They will be removed
+ * from the list at end commit. We cannot change the list,
+ * because it is not protected by any mutex (design decision to
+ * make commit really independent and parallel to main I/O). So
+ * we just skip these znodes.
+ *
+ * Note, the 'clean_zn_cnt' counters are not updated until
+ * after the commit, so the UBIFS shrinker does not report
+ * the znodes which are in the 'c->cnext' list as freeable.
+ *
+ * Also note, if the root of a sub-tree is not in 'c->cnext',
+ * then the whole sub-tree is not in 'c->cnext' as well, so it
+ * is safe to dump whole sub-tree.
+ */
+
+ if (znode->cnext) {
+ /*
+ * Very soon these znodes will be removed from the list
+ * and become freeable.
+ */
+ *contention = 1;
+ } else if (!ubifs_zn_dirty(znode) &&
+ abs(time - znode->time) >= age) {
+ if (znode->parent)
+ znode->parent->zbranch[znode->iip].znode = NULL;
+ else
+ c->zroot.znode = NULL;
+
+ freed = ubifs_destroy_tnc_subtree(znode);
+ atomic_long_sub(freed, &ubifs_clean_zn_cnt);
+ atomic_long_sub(freed, &c->clean_zn_cnt);
+ ubifs_assert(atomic_long_read(&c->clean_zn_cnt) >= 0);
+ total_freed += freed;
+ znode = zprev;
+ }
+
+ if (unlikely(!c->zroot.znode))
+ break;
+
+ zprev = znode;
+ znode = ubifs_tnc_levelorder_next(c->zroot.znode, znode);
+ cond_resched();
+ }
+
+ return total_freed;
+}
+
+/**
+ * shrink_tnc_trees - shrink UBIFS TNC trees.
+ * @nr: number of znodes to free
+ * @age: the age of znodes to free
+ * @contention: if any contention, this is set to %1
+ *
+ * This function walks the list of mounted UBIFS file-systems and frees clean
+ * znodes which are older then @age, until at least @nr znodes are freed.
+ * Returns the number of freed znodes.
+ */
+static int shrink_tnc_trees(int nr, int age, int *contention)
+{
+ struct ubifs_info *c;
+ struct list_head *p;
+ unsigned int run_no;
+ int freed = 0;
+
+ spin_lock(&ubifs_infos_lock);
+ do
+ run_no = ++shrinker_run_no;
+ while (run_no == 0);
+ /* Iterate over all mounted UBIFS file-systems and try to shrink them */
+ p = ubifs_infos.next;
+ while (p != &ubifs_infos) {
+ c = list_entry(p, struct ubifs_info, infos_list);
+ /*
+ * We move the ones we do to the end of the list, so we stop
+ * when we see one we have already done.
+ */
+ if (c->shrinker_run_no == run_no)
+ break;
+ if (!mutex_trylock(&c->umount_mutex)) {
+ /* Some un-mount is in progress, try next FS */
+ *contention = 1;
+ p = p->next;
+ continue;
+ }
+ /*
+ * We're holding 'c->umount_mutex', so the file-system won't go
+ * away.
+ */
+ if (!mutex_trylock(&c->tnc_mutex)) {
+ mutex_unlock(&c->umount_mutex);
+ *contention = 1;
+ p = p->next;
+ continue;
+ }
+ spin_unlock(&ubifs_infos_lock);
+ /*
+ * OK, now we have TNC locked, the file-system cannot go away -
+ * it is safe to reap the cache.
+ */
+ c->shrinker_run_no = run_no;
+ freed += shrink_tnc(c, nr, age, contention);
+ mutex_unlock(&c->tnc_mutex);
+ spin_lock(&ubifs_infos_lock);
+ /* Get the next list element before we move this one */
+ p = p->next;
+ /*
+ * Move this one to the end of the list to provide some
+ * fairness.
+ */
+ list_del(&c->infos_list);
+ list_add_tail(&c->infos_list, &ubifs_infos);
+ mutex_unlock(&c->umount_mutex);
+ if (freed >= nr)
+ break;
+ }
+ spin_unlock(&ubifs_infos_lock);
+ return freed;
+}
+
+/**
+ * kick_a_thread - kick a background thread to start commit.
+ *
+ * This function kicks a background thread to start background commit. Returns
+ * %-1 if a thread was kicked or there is another reason to assume the memory
+ * will soon be freed or become freeable. If there are no dirty znodes, returns
+ * %0.
+ */
+static int kick_a_thread(void)
+{
+ int i;
+ struct ubifs_info *c;
+
+ /*
+ * Iterate over all mounted UBIFS file-systems and find out if there is
+ * already an ongoing commit operation there. If no, then iterate for
+ * the second time and initiate background commit.
+ */
+ spin_lock(&ubifs_infos_lock);
+ for (i = 0; i < 2; i++) {
+ list_for_each_entry(c, &ubifs_infos, infos_list) {
+ long dirty_zn_cnt;
+
+ if (!mutex_trylock(&c->umount_mutex)) {
+ /*
+ * Some un-mount is in progress, it will
+ * certainly free memory, so just return.
+ */
+ spin_unlock(&ubifs_infos_lock);
+ return -1;
+ }
+
+ dirty_zn_cnt = atomic_long_read(&c->dirty_zn_cnt);
+
+ if (!dirty_zn_cnt || c->cmt_state == COMMIT_BROKEN ||
+ c->ro_media) {
+ mutex_unlock(&c->umount_mutex);
+ continue;
+ }
+
+ if (c->cmt_state != COMMIT_RESTING) {
+ spin_unlock(&ubifs_infos_lock);
+ mutex_unlock(&c->umount_mutex);
+ return -1;
+ }
+
+ if (i == 1) {
+ list_del(&c->infos_list);
+ list_add_tail(&c->infos_list, &ubifs_infos);
+ spin_unlock(&ubifs_infos_lock);
+
+ ubifs_request_bg_commit(c);
+ mutex_unlock(&c->umount_mutex);
+ return -1;
+ }
+ mutex_unlock(&c->umount_mutex);
+ }
+ }
+ spin_unlock(&ubifs_infos_lock);
+
+ return 0;
+}
+
+int ubifs_shrinker(int nr, gfp_t gfp_mask)
+{
+ int freed, contention = 0;
+ long clean_zn_cnt = atomic_long_read(&ubifs_clean_zn_cnt);
+
+ if (nr == 0)
+ return clean_zn_cnt;
+
+ if (!clean_zn_cnt) {
+ /*
+ * No clean znodes, nothing to reap. All we can do in this case
+ * is to kick background threads to start commit, which will
+ * probably make clean znodes which, in turn, will be freeable.
+ * And we return -1 which means will make VM call us again
+ * later.
+ */
+ dbg_tnc("no clean znodes, kick a thread");
+ return kick_a_thread();
+ }
+
+ freed = shrink_tnc_trees(nr, OLD_ZNODE_AGE, &contention);
+ if (freed >= nr)
+ goto out;
+
+ dbg_tnc("not enough old znodes, try to free young ones");
+ freed += shrink_tnc_trees(nr - freed, YOUNG_ZNODE_AGE, &contention);
+ if (freed >= nr)
+ goto out;
+
+ dbg_tnc("not enough young znodes, free all");
+ freed += shrink_tnc_trees(nr - freed, 0, &contention);
+
+ if (!freed && contention) {
+ dbg_tnc("freed nothing, but contention");
+ return -1;
+ }
+
+out:
+ dbg_tnc("%d znodes were freed, requested %d", freed, nr);
+ return freed;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/super.c avr32-2.6/fs/ubifs/super.c
--- linux-2.6.25.6/fs/ubifs/super.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/super.c 2008-06-12 15:09:45.600758286 +0200
@@ -0,0 +1,1969 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file implements UBIFS initialization and VFS superblock operations. Some
+ * initialization stuff which is rather large and complex is placed at
+ * corresponding subsystems, but most of it is here.
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/random.h>
+#include <linux/kthread.h>
+#include <linux/parser.h>
+#include <linux/seq_file.h>
+#include <linux/mount.h>
+#include "ubifs.h"
+
+/* Slab cache for UBIFS inodes */
+struct kmem_cache *ubifs_inode_slab;
+
+/* UBIFS TNC shrinker description */
+static struct shrinker ubifs_shrinker_info = {
+ .shrink = ubifs_shrinker,
+ .seeks = DEFAULT_SEEKS,
+};
+
+/**
+ * validate_inode - validate inode.
+ * @c: UBIFS file-system description object
+ * @inode: the inode to validate
+ *
+ * This is a helper function for 'ubifs_iget()' which validates various fields
+ * of a newly built inode to make sure they contain sane values and prevent
+ * possible vulnerabilities. Returns zero if the inode is all right and
+ * a non-zero error code if not.
+ */
+static int validate_inode(struct ubifs_info *c, const struct inode *inode)
+{
+ int err;
+ const struct ubifs_inode *ui = ubifs_inode(inode);
+
+ if (inode->i_size > c->max_inode_sz) {
+ ubifs_err("inode is too large (%lld)",
+ (long long)inode->i_size);
+ return 1;
+ }
+
+ if (ui->compr_type < 0 || ui->compr_type >= UBIFS_COMPR_TYPES_CNT) {
+ ubifs_err("unknown compression type %d", ui->compr_type);
+ return 2;
+ }
+
+ if (ui->xattr_cnt < 0)
+ return 3;
+
+ if (ui->xattr_size < 0)
+ return 4;
+
+ if (ui->xattr_names < 0 ||
+ ui->xattr_names + ui->xattr_cnt > XATTR_LIST_MAX)
+ return 5;
+
+ if (ui->data_len < 0 || ui->data_len > UBIFS_MAX_INO_DATA)
+ return 6;
+
+ if (!ubifs_compr_present(ui->compr_type)) {
+ ubifs_warn("inode %lu uses '%s' compression, but it was not "
+ "compiled in", inode->i_ino,
+ ubifs_compr_name(ui->compr_type));
+ }
+
+ err = dbg_check_dir_size(c, inode);
+ return err;
+}
+
+struct inode *ubifs_iget(struct super_block *sb, unsigned long inum)
+{
+ int err;
+ union ubifs_key key;
+ struct ubifs_ino_node *ino;
+ struct ubifs_info *c = sb->s_fs_info;
+ struct inode *inode;
+ struct ubifs_inode *ui;
+
+ dbg_gen("inode %lu", inum);
+
+ inode = iget_locked(sb, inum);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
+ ui = ubifs_inode(inode);
+
+ ino = kmalloc(UBIFS_MAX_INO_NODE_SZ, GFP_NOFS);
+ if (!ino) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ ino_key_init(c, &key, inode->i_ino);
+
+ err = ubifs_tnc_lookup(c, &key, ino);
+ if (err)
+ goto out_ino;
+
+ inode->i_flags |= (S_NOCMTIME | S_NOATIME);
+ inode->i_nlink = le32_to_cpu(ino->nlink);
+ inode->i_uid = le32_to_cpu(ino->uid);
+ inode->i_gid = le32_to_cpu(ino->gid);
+ inode->i_atime.tv_sec = (int64_t)le64_to_cpu(ino->atime_sec);
+ inode->i_atime.tv_nsec = le32_to_cpu(ino->atime_nsec);
+ inode->i_mtime.tv_sec = (int64_t)le64_to_cpu(ino->mtime_sec);
+ inode->i_mtime.tv_nsec = le32_to_cpu(ino->mtime_nsec);
+ inode->i_ctime.tv_sec = (int64_t)le64_to_cpu(ino->ctime_sec);
+ inode->i_ctime.tv_nsec = le32_to_cpu(ino->ctime_nsec);
+ inode->i_mode = le32_to_cpu(ino->mode);
+ inode->i_size = le64_to_cpu(ino->size);
+
+ ui->data_len = le32_to_cpu(ino->data_len);
+ ui->flags = le32_to_cpu(ino->flags);
+ ui->compr_type = le16_to_cpu(ino->compr_type);
+ ui->creat_sqnum = le64_to_cpu(ino->creat_sqnum);
+ ui->xattr_cnt = le32_to_cpu(ino->xattr_cnt);
+ ui->xattr_size = le64_to_cpu(ino->xattr_size);
+ ui->xattr_names = le32_to_cpu(ino->xattr_names);
+
+ err = validate_inode(c, inode);
+ if (err)
+ goto out_invalid;
+
+ /* Disable readahead */
+ inode->i_mapping->backing_dev_info = &ubifs_backing_dev_info;
+
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFREG:
+ inode->i_mapping->a_ops = &ubifs_file_address_operations;
+ inode->i_op = &ubifs_file_inode_operations;
+ inode->i_fop = &ubifs_file_operations;
+ if (ui->data_len != 0) {
+ err = 10;
+ goto out_invalid;
+ }
+ break;
+ case S_IFDIR:
+ inode->i_op = &ubifs_dir_inode_operations;
+ inode->i_fop = &ubifs_dir_operations;
+ if (ui->data_len != 0) {
+ err = 11;
+ goto out_invalid;
+ }
+ break;
+ case S_IFLNK:
+ inode->i_op = &ubifs_symlink_inode_operations;
+ if (ui->data_len <= 0 || ui->data_len > UBIFS_MAX_INO_DATA) {
+ err = 12;
+ goto out_invalid;
+ }
+ ui->data = kmalloc(ui->data_len + 1, GFP_NOFS);
+ if (!ui->data) {
+ err = -ENOMEM;
+ goto out_ino;
+ }
+ memcpy(ui->data, ino->data, ui->data_len);
+ ((char *)ui->data)[ui->data_len] = '\0';
+ break;
+ case S_IFBLK:
+ case S_IFCHR:
+ {
+ dev_t rdev;
+ union ubifs_dev_desc *dev;
+
+ ui->data = kmalloc(sizeof(union ubifs_dev_desc), GFP_NOFS);
+ if (!ui->data) {
+ err = -ENOMEM;
+ goto out_ino;
+ }
+
+ dev = (union ubifs_dev_desc *)ino->data;
+ if (ui->data_len == sizeof(dev->new))
+ rdev = new_decode_dev(le32_to_cpu(dev->new));
+ else if (ui->data_len == sizeof(dev->huge))
+ rdev = huge_decode_dev(le64_to_cpu(dev->huge));
+ else {
+ err = 13;
+ goto out_invalid;
+ }
+ memcpy(ui->data, ino->data, ui->data_len);
+ inode->i_op = &ubifs_file_inode_operations;
+ init_special_inode(inode, inode->i_mode, rdev);
+ break;
+ }
+ case S_IFSOCK:
+ case S_IFIFO:
+ inode->i_op = &ubifs_file_inode_operations;
+ init_special_inode(inode, inode->i_mode, 0);
+ if (ui->data_len != 0) {
+ err = 14;
+ goto out_invalid;
+ }
+ break;
+ default:
+ err = 15;
+ goto out_invalid;
+ }
+
+ kfree(ino);
+ ubifs_set_inode_flags(inode);
+ unlock_new_inode(inode);
+ return inode;
+
+out_invalid:
+ ubifs_err("inode %lu validation failed, error %d", inode->i_ino, err);
+ dbg_dump_node(c, ino);
+ dbg_dump_inode(c, inode);
+ err = -EINVAL;
+out_ino:
+ kfree(ino);
+out:
+ ubifs_err("failed to read inode %lu, error %d", inode->i_ino, err);
+ iget_failed(inode);
+ return ERR_PTR(err);
+}
+
+static struct inode *ubifs_alloc_inode(struct super_block *sb)
+{
+ struct ubifs_inode *ui;
+
+ ui = kmem_cache_alloc(ubifs_inode_slab, GFP_NOFS);
+ if (!ui)
+ return NULL;
+
+ memset((void *)ui + sizeof(struct inode), 0,
+ sizeof(struct ubifs_inode) - sizeof(struct inode));
+ mutex_init(&ui->budg_mutex);
+ return &ui->vfs_inode;
+};
+
+static void ubifs_destroy_inode(struct inode *inode)
+{
+ struct ubifs_inode *ui = ubifs_inode(inode);
+
+ kfree(ui->data);
+ kmem_cache_free(ubifs_inode_slab, inode);
+}
+
+/*
+ * Note, Linux write-back code calls this without 'i_mutex'.
+ */
+static int ubifs_write_inode(struct inode *inode, int wait)
+{
+ int err;
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ struct ubifs_budget_req req = {.dd_growth = c->inode_budget,
+ .dirtied_ino_d = ui->data_len};
+
+ ubifs_assert(!ui->xattr);
+ if (is_bad_inode(inode))
+ return 0;
+
+ mutex_lock(&ui->budg_mutex);
+
+ /*
+ * Due to races between write-back forced by budgeting
+ * (see 'sync_some_inodes()') and pdflush write-back, the inode may
+ * have already been synchronized, do not do this again.
+ *
+ * This might also happen if it was synchronized in e.g. ubifs_link()',
+ * etc.
+ */
+ if (!ui->dirty) {
+ mutex_unlock(&ui->budg_mutex);
+ return 0;
+ }
+
+ ubifs_assert(ui->budgeted);
+ dbg_gen("inode %lu", inode->i_ino);
+
+ err = ubifs_jnl_write_inode(c, inode, 0, IS_SYNC(inode));
+ if (err)
+ ubifs_err("can't write inode %lu, error %d", inode->i_ino, err);
+
+ ui->dirty = 0;
+ UBIFS_DBG(ui->budgeted = 0);
+ atomic_long_dec(&c->dirty_ino_cnt);
+
+ ubifs_release_budget(c, &req);
+ mutex_unlock(&ui->budg_mutex);
+
+ return err;
+}
+
+static void ubifs_delete_inode(struct inode *inode)
+{
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ struct ubifs_budget_req req = {.dd_growth = c->inode_budget,
+ .dirtied_ino_d = ui->data_len};
+ int err;
+
+ if (ui->xattr) {
+ /*
+ * Extended attribute inode deletions are fully handled in
+ * 'ubifs_removexattr()'. These inodes are special and have
+ * limited usage, so there is nothing to do here.
+ */
+ ubifs_assert(!ui->dirty);
+ goto out;
+ }
+
+ dbg_gen("inode %lu", inode->i_ino);
+ ubifs_assert(!atomic_read(&inode->i_count));
+ ubifs_assert(inode->i_nlink == 0);
+
+ truncate_inode_pages(&inode->i_data, 0);
+ if (is_bad_inode(inode))
+ goto out;
+
+ mutex_lock(&ui->budg_mutex);
+
+ inode->i_size = 0;
+
+ err = ubifs_jnl_write_inode(c, inode, 1, IS_SYNC(inode));
+ if (err)
+ /*
+ * Worst case we have a lost orphan inode wasting space, so a
+ * simple error message is ok here.
+ */
+ ubifs_err("can't write inode %lu, error %d", inode->i_ino, err);
+
+ if (ui->dirty) {
+ ubifs_assert(ui->budgeted);
+ atomic_long_dec(&c->dirty_ino_cnt);
+ ui->dirty = 0;
+ UBIFS_DBG(ui->budgeted = 0);
+ ubifs_release_budget(c, &req);
+ }
+
+ mutex_unlock(&ui->budg_mutex);
+out:
+ clear_inode(inode);
+}
+
+static void ubifs_dirty_inode(struct inode *inode)
+{
+ struct ubifs_inode *ui = ubifs_inode(inode);
+
+ ubifs_assert(mutex_is_locked(&ui->budg_mutex));
+ if (!ui->dirty) {
+ struct ubifs_info *c = inode->i_sb->s_fs_info;
+
+ ui->dirty = 1;
+ atomic_long_inc(&c->dirty_ino_cnt);
+ dbg_gen("inode %lu", inode->i_ino);
+ }
+}
+
+static int ubifs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct ubifs_info *c = dentry->d_sb->s_fs_info;
+ unsigned long long free;
+
+ free = ubifs_budg_get_free_space(c);
+ dbg_gen("free space %lld bytes (%lld blocks)",
+ free, free >> UBIFS_BLOCK_SHIFT);
+
+ buf->f_type = UBIFS_SUPER_MAGIC;
+ buf->f_bsize = UBIFS_BLOCK_SIZE;
+ buf->f_blocks = c->block_cnt;
+ buf->f_bfree = free >> UBIFS_BLOCK_SHIFT;
+ if (free > c->report_rp_size)
+ buf->f_bavail = (free - c->report_rp_size) >> UBIFS_BLOCK_SHIFT;
+ else
+ buf->f_bavail = 0;
+ buf->f_files = 0;
+ buf->f_ffree = 0;
+ buf->f_namelen = UBIFS_MAX_NLEN;
+
+ return 0;
+}
+
+static int ubifs_show_options(struct seq_file *s, struct vfsmount *mnt)
+{
+ struct ubifs_info *c = mnt->mnt_sb->s_fs_info;
+
+ if (c->mount_opts.unmount_mode == 2)
+ seq_printf(s, ",fast_unmount");
+ else if (c->mount_opts.unmount_mode == 1)
+ seq_printf(s, ",norm_unmount");
+
+ return 0;
+}
+
+static int ubifs_sync_fs(struct super_block *sb, int wait)
+{
+ struct ubifs_info *c = sb->s_fs_info;
+ int i, ret = 0, err;
+
+ if (c->jheads)
+ for (i = 0; i < c->jhead_cnt; i++) {
+ err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
+ if (err && !ret)
+ ret = err;
+ }
+ /*
+ * We ought to call sync for c->ubi but it does not have one. If it had
+ * it would in turn call mtd->sync, however mtd operations are
+ * synchronous anyway, so we don't lose any sleep here.
+ */
+ return ret;
+}
+
+/**
+ * init_constants_early - initialize UBIFS constants.
+ * @c: UBIFS file-system description object
+ *
+ * This function initialize UBIFS constants which do not need the superblock to
+ * be read. It also checks that the UBI volume satisfies basic UBIFS
+ * requirements. Returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int init_constants_early(struct ubifs_info *c)
+{
+ if (c->vi.corrupted) {
+ ubifs_warn("UBI volume is corrupted - read-only mode");
+ c->ro_media = 1;
+ }
+
+ if (c->di.ro_mode) {
+ ubifs_msg("read-only UBI device");
+ c->ro_media = 1;
+ }
+
+ if (c->vi.vol_type == UBI_STATIC_VOLUME) {
+ ubifs_msg("static UBI volume - read-only mode");
+ c->ro_media = 1;
+ }
+
+ c->leb_cnt = c->vi.size;
+ c->leb_size = c->vi.usable_leb_size;
+ c->half_leb_size = c->leb_size / 2;
+ c->min_io_size = c->di.min_io_size;
+ c->min_io_shift = fls(c->min_io_size) - 1;
+
+ if (c->leb_size < UBIFS_MIN_LEB_SZ) {
+ ubifs_err("too small LEBs (%d bytes), min. is %d bytes",
+ c->leb_size, UBIFS_MIN_LEB_SZ);
+ return -EINVAL;
+ }
+
+ if (c->leb_cnt < UBIFS_MIN_LEB_CNT) {
+ ubifs_err("too few LEBs (%d), min. is %d",
+ c->leb_cnt, UBIFS_MIN_LEB_CNT);
+ return -EINVAL;
+ }
+
+ if (!is_power_of_2(c->min_io_size)) {
+ ubifs_err("bad min. I/O size %d", c->min_io_size);
+ return -EINVAL;
+ }
+
+ /*
+ * UBIFS aligns all node to 8-byte boundary, so to make function in
+ * io.c simpler, assume minimum I/O unit size to be 8 bytes if it is
+ * less than 8.
+ */
+ if (c->min_io_size < 8) {
+ c->min_io_size = 8;
+ c->min_io_shift = 3;
+ }
+
+ c->ref_node_alsz = ALIGN(UBIFS_REF_NODE_SZ, c->min_io_size);
+ c->mst_node_alsz = ALIGN(UBIFS_MST_NODE_SZ, c->min_io_size);
+
+ /*
+ * Initialize node length ranges which are mostly needed for node
+ * length validation.
+ */
+ c->ranges[UBIFS_PAD_NODE].len = UBIFS_PAD_NODE_SZ;
+ c->ranges[UBIFS_SB_NODE].len = UBIFS_SB_NODE_SZ;
+ c->ranges[UBIFS_MST_NODE].len = UBIFS_MST_NODE_SZ;
+ c->ranges[UBIFS_REF_NODE].len = UBIFS_REF_NODE_SZ;
+ c->ranges[UBIFS_TRUN_NODE].len = UBIFS_TRUN_NODE_SZ;
+ c->ranges[UBIFS_CS_NODE].len = UBIFS_CS_NODE_SZ;
+
+ c->ranges[UBIFS_INO_NODE].min_len = UBIFS_INO_NODE_SZ;
+ c->ranges[UBIFS_INO_NODE].max_len = UBIFS_MAX_INO_NODE_SZ;
+ c->ranges[UBIFS_ORPH_NODE].min_len =
+ UBIFS_ORPH_NODE_SZ + sizeof(__le64);
+ c->ranges[UBIFS_ORPH_NODE].max_len = c->leb_size;
+ c->ranges[UBIFS_DENT_NODE].min_len = UBIFS_DENT_NODE_SZ;
+ c->ranges[UBIFS_DENT_NODE].max_len = UBIFS_MAX_DENT_NODE_SZ;
+ c->ranges[UBIFS_XENT_NODE].min_len = UBIFS_XENT_NODE_SZ;
+ c->ranges[UBIFS_XENT_NODE].max_len = UBIFS_MAX_XENT_NODE_SZ;
+ c->ranges[UBIFS_DATA_NODE].min_len = UBIFS_DATA_NODE_SZ;
+ c->ranges[UBIFS_DATA_NODE].max_len = UBIFS_MAX_DATA_NODE_SZ;
+ /*
+ * Minimum indexing node size is amended later when superblock is
+ * read and the key length is known.
+ */
+ c->ranges[UBIFS_IDX_NODE].min_len = UBIFS_IDX_NODE_SZ + UBIFS_BRANCH_SZ;
+ /*
+ * Maximum indexing node size is amended later when superblock is
+ * read and the fanout is known.
+ */
+ c->ranges[UBIFS_IDX_NODE].max_len = INT_MAX;
+
+ /*
+ * Initialize dead and dark LEB space watermarks.
+ *
+ * Dead space is the space which cannot be used. Its watermark is
+ * equivalent to min. I/O unit or minimum node size if it is greater
+ * then min. I/O unit.
+ *
+ * Dark space is the space which might be used, or might not, depending
+ * on which node should be written to the LEB. Its watermark is
+ * equivalent to maximum UBIFS node size.
+ */
+ c->dead_wm = ALIGN(MIN_WRITE_SZ, c->min_io_size);
+ c->dark_wm = ALIGN(UBIFS_MAX_NODE_SZ, c->min_io_size);
+
+ return 0;
+}
+
+/**
+ * bud_wbuf_callback - bud LEB write-buffer synchronization call-back.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB the write-buffer was synchronized to
+ * @free: how many free bytes left in this LEB
+ * @pad: how many bytes were padded
+ *
+ * This is a callback function which is called by the I/O unit when the
+ * write-buffer is synchronized. We need this to correctly maintain space
+ * accounting in bud logical eraseblocks. This function returns zero in case of
+ * success and a negative error code in case of failure.
+ *
+ * This function actually belongs to the journal, but we keep it here because
+ * we want to keep it static.
+ */
+static int bud_wbuf_callback(struct ubifs_info *c, int lnum, int free, int pad)
+{
+ return ubifs_update_one_lp(c, lnum, free, pad, 0, 0);
+}
+
+/*
+ * init_constants_late - initialize UBIFS constants.
+ * @c: UBIFS file-system description object
+ *
+ * This is a helper function which initializes various UBIFS constants after
+ * the superblock has been read. It also checks various UBIFS parameters and
+ * makes sure they are all right. Returns zero in case of success and a
+ * negative error code in case of failure.
+ */
+static int init_constants_late(struct ubifs_info *c)
+{
+ int tmp, err;
+ uint64_t tmp64;
+
+ c->main_bytes = c->main_lebs * c->leb_size;
+
+ c->max_znode_sz = sizeof(struct ubifs_znode) +
+ c->fanout * sizeof(struct ubifs_zbranch);
+
+ tmp = ubifs_idx_node_sz(c, 1);
+ c->ranges[UBIFS_IDX_NODE].min_len = tmp;
+ c->min_idx_node_sz = ALIGN(tmp, 8);
+
+ tmp = ubifs_idx_node_sz(c, c->fanout);
+ c->ranges[UBIFS_IDX_NODE].max_len = tmp;
+ c->max_idx_node_sz = ALIGN(tmp, 8);
+
+ /* Make sure LEB size is large enough to fit full commit */
+ tmp = UBIFS_CS_NODE_SZ + UBIFS_REF_NODE_SZ * c->jhead_cnt;
+ tmp = ALIGN(tmp, c->min_io_size);
+ if (tmp > c->leb_size) {
+ dbg_err("too small LEB size %d, at least %d needed",
+ c->leb_size, tmp);
+ return -EINVAL;
+ }
+
+ /*
+ * Make sure that the log is large enough to fit reference nodes for
+ * all buds plus one reserved LEB.
+ */
+ tmp64 = c->max_bud_bytes;
+ tmp = do_div(tmp64, c->leb_size);
+ c->max_bud_cnt = tmp64 + !!tmp;
+ tmp = (c->ref_node_alsz * c->max_bud_cnt + c->leb_size - 1);
+ tmp /= c->leb_size;
+ tmp += 1;
+ if (c->log_lebs < tmp) {
+ dbg_err("too small log %d LEBs, required min. %d LEBs",
+ c->log_lebs, tmp);
+ return -EINVAL;
+ }
+
+ /*
+ * When budgeting we assume worst-case scenarios when the pages are not
+ * be compressed and direntries are of the maximum size.
+ *
+ * Note, data, which may be stored in inodes is budgeted separately, so
+ * it is not included into 'c->inode_budget'.
+ */
+ c->page_budget = UBIFS_MAX_DATA_NODE_SZ * UBIFS_BLOCKS_PER_PAGE;
+ c->inode_budget = UBIFS_INO_NODE_SZ;
+ c->dent_budget = UBIFS_MAX_DENT_NODE_SZ;
+
+ /*
+ * When the amount of flash space used by buds becomes
+ * 'c->max_bud_bytes', UBIFS just blocks all writers and starts commit.
+ * The writers are unblocked when the commit is finished. To avoid
+ * writers to be blocked UBIFS initiates background commit in advance,
+ * when number of bud bytes becomes above the limit defined below.
+ */
+ c->bg_bud_bytes = (c->max_bud_bytes * 13) >> 4;
+
+ /*
+ * Ensure minimum journal size. All the bytes in the journal heads are
+ * considered to be used, when calculating the current journal usage.
+ * Consequently, if the journal is too small, UBIFS will treat it as
+ * always full.
+ */
+ tmp64 = (uint64_t)(c->jhead_cnt + 1) * c->leb_size + 1;
+ if (c->bg_bud_bytes < tmp64)
+ c->bg_bud_bytes = tmp64;
+ if (c->max_bud_bytes < tmp64 + c->leb_size)
+ c->max_bud_bytes = tmp64 + c->leb_size;
+
+ err = ubifs_calc_lpt_geom(c);
+ if (err)
+ return err;
+
+ c->min_idx_lebs = ubifs_calc_min_idx_lebs(c);
+
+ /*
+ * Calculate total amount of FS blocks. This number is not used
+ * internally because it does not make much sense for UBIFS, but it is
+ * necessary to report something for the 'statfs()' call.
+ *
+ * Subtract the LEB reserved for GC and the LEB which is reserved for
+ * deletions.
+ *
+ * Review 'ubifs_calc_available()' if changing this calculation.
+ */
+ tmp64 = c->main_lebs - 2;
+ tmp64 *= c->leb_size - c->dark_wm;
+ tmp64 = ubifs_reported_space(c, tmp64);
+ c->block_cnt = tmp64 >> UBIFS_BLOCK_SHIFT;
+
+ return 0;
+}
+
+/**
+ * take_gc_lnum - reserve GC LEB.
+ * @c: UBIFS file-system description object
+ *
+ * This function ensures that the LEB reserved for garbage collection is
+ * unmapped and is marked as "taken" in lprops. We also have to set free space
+ * to LEB size and dirty space to zero, because lprops may contain out-of-date
+ * information if the file-system was un-mounted before it has been committed.
+ * This function returns zero in case of success and a negative error code in
+ * case of failure.
+ */
+static int take_gc_lnum(struct ubifs_info *c)
+{
+ int err;
+
+ if (c->gc_lnum == -1) {
+ ubifs_err("no LEB for GC");
+ return -EINVAL;
+ }
+
+ err = ubifs_leb_unmap(c, c->gc_lnum);
+ if (err)
+ return err;
+
+ /* And we have to tell lprops that this LEB is taken */
+ err = ubifs_change_one_lp(c, c->gc_lnum, c->leb_size, 0,
+ LPROPS_TAKEN, 0, 0);
+ return err;
+}
+
+/**
+ * alloc_wbufs - allocate write-buffers.
+ * @c: UBIFS file-system description object
+ *
+ * This helper function allocates and initializes UBIFS write-buffers. Returns
+ * zero in case of success and %-ENOMEM in case of failure.
+ */
+static int alloc_wbufs(struct ubifs_info *c)
+{
+ int i, err;
+
+ c->jheads = kzalloc(c->jhead_cnt * sizeof(struct ubifs_jhead),
+ GFP_KERNEL);
+ if (!c->jheads)
+ return -ENOMEM;
+
+ /* Initialize journal heads */
+ for (i = 0; i < c->jhead_cnt; i++) {
+ INIT_LIST_HEAD(&c->jheads[i].buds_list);
+ err = ubifs_wbuf_init(c, &c->jheads[i].wbuf);
+ if (err)
+ return err;
+
+ c->jheads[i].wbuf.sync_callback = &bud_wbuf_callback;
+ c->jheads[i].wbuf.jhead = i;
+ }
+
+ c->jheads[BASEHD].wbuf.dtype = UBI_SHORTTERM;
+ /*
+ * Garbage Collector head likely contains long-term data and
+ * does not need to be synchronized by timer.
+ */
+ c->jheads[GCHD].wbuf.dtype = UBI_LONGTERM;
+ c->jheads[GCHD].wbuf.timeout = 0;
+
+ return 0;
+}
+
+/**
+ * free_wbufs - free write-buffers.
+ * @c: UBIFS file-system description object
+ */
+static void free_wbufs(struct ubifs_info *c)
+{
+ int i;
+
+ if (c->jheads) {
+ for (i = 0; i < c->jhead_cnt; i++) {
+ kfree(c->jheads[i].wbuf.buf);
+ kfree(c->jheads[i].wbuf.inodes);
+ }
+ kfree(c->jheads);
+ c->jheads = NULL;
+ }
+}
+
+/**
+ * free_orphans - free orphans.
+ * @c: UBIFS file-system description object
+ */
+static void free_orphans(struct ubifs_info *c)
+{
+ struct ubifs_orphan *orph;
+
+ while (c->orph_dnext) {
+ orph = c->orph_dnext;
+ c->orph_dnext = orph->dnext;
+ list_del(&orph->list);
+ kfree(orph);
+ }
+
+ while (!list_empty(&c->orph_list)) {
+ orph = list_entry(c->orph_list.next, struct ubifs_orphan, list);
+ list_del(&orph->list);
+ kfree(orph);
+ dbg_err("orphan list not empty at unmount");
+ }
+
+ vfree(c->orph_buf);
+ c->orph_buf = NULL;
+}
+
+/**
+ * free_buds - free per-bud objects.
+ * @c: UBIFS file-system description object
+ */
+static void free_buds(struct ubifs_info *c)
+{
+ struct rb_node *this = c->buds.rb_node;
+ struct ubifs_bud *bud;
+
+ while (this) {
+ if (this->rb_left)
+ this = this->rb_left;
+ else if (this->rb_right)
+ this = this->rb_right;
+ else {
+ bud = rb_entry(this, struct ubifs_bud, rb);
+ this = rb_parent(this);
+ if (this) {
+ if (this->rb_left == &bud->rb)
+ this->rb_left = NULL;
+ else
+ this->rb_right = NULL;
+ }
+ kfree(bud);
+ }
+ }
+}
+
+/**
+ * check_volume_empty - check if the UBI volume is empty.
+ * @c: UBIFS file-system description object
+ *
+ * This function checks if the UBIFS volume is empty by looking if its LEBs are
+ * mapped or not. The result of checking is stored in the @c->empty variable.
+ * Returns zero in case of success and a negative error code in case of
+ * failure.
+ */
+static int check_volume_empty(struct ubifs_info *c)
+{
+ int lnum, err;
+
+ c->empty = 1;
+ for (lnum = 0; lnum < c->leb_cnt; lnum++) {
+ err = ubi_is_mapped(c->ubi, lnum);
+ if (unlikely(err < 0))
+ return err;
+ if (err == 1) {
+ c->empty = 0;
+ break;
+ }
+
+ cond_resched();
+ }
+
+ return 0;
+}
+
+/*
+ * UBIFS mount options.
+ *
+ * Opt_fast_unmount: do not run a journal commit before un-mounting
+ * Opt_norm_unmount: run a journal commit before un-mounting
+ * Opt_err: just end of array marker
+ */
+enum {
+ Opt_fast_unmount,
+ Opt_norm_unmount,
+ Opt_err,
+};
+
+static match_table_t tokens = {
+ {Opt_fast_unmount, "fast_unmount"},
+ {Opt_norm_unmount, "norm_unmount"},
+ {Opt_err, NULL},
+};
+
+/**
+ * ubifs_parse_options - parse mount parameters.
+ * @c: UBIFS file-system description object
+ * @options: parameters to parse
+ * @is_remount: non-zero if this is FS re-mount
+ *
+ * This function parses UBIFS mount options and returns zero in case success
+ * and a negative error code in case of failure.
+ */
+static int ubifs_parse_options(struct ubifs_info *c, char *options,
+ int is_remount)
+{
+ char *p;
+ substring_t args[MAX_OPT_ARGS];
+
+ if (!options)
+ return 0;
+
+ while ((p = strsep(&options, ","))) {
+ int token;
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_fast_unmount:
+ c->mount_opts.unmount_mode = 2;
+ c->fast_unmount = 1;
+ break;
+ case Opt_norm_unmount:
+ c->mount_opts.unmount_mode = 1;
+ c->fast_unmount = 0;
+ break;
+ default:
+ ubifs_err("unrecognized mount option \"%s\" "
+ "or missing value", p);
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * destroy_journal - destroy journal data structures.
+ * @c: UBIFS file-system description object
+ *
+ * This function destroys journal data structures including those that may have
+ * been created by recovery functions.
+ */
+static void destroy_journal(struct ubifs_info *c)
+{
+ while (!list_empty(&c->unclean_leb_list)) {
+ struct ubifs_unclean_leb *ucleb;
+
+ ucleb = list_entry(c->unclean_leb_list.next,
+ struct ubifs_unclean_leb, list);
+ list_del(&ucleb->list);
+ kfree(ucleb);
+ }
+ while (!list_empty(&c->old_buds)) {
+ struct ubifs_bud *bud;
+
+ bud = list_entry(c->old_buds.next, struct ubifs_bud, list);
+ list_del(&bud->list);
+ kfree(bud);
+ }
+ ubifs_destroy_idx_gc(c);
+ ubifs_destroy_size_tree(c);
+ ubifs_tnc_close(c);
+ free_buds(c);
+}
+
+/**
+ * mount_ubifs - mount UBIFS file-system.
+ * @c: UBIFS file-system description object
+ *
+ * This function mounts UBIFS file system. Returns zero in case of success and
+ * a negative error code in case of failure.
+ *
+ * Note, the function does not de-allocate resources it it fails half way
+ * through, and the caller has to do this instead.
+ */
+static int mount_ubifs(struct ubifs_info *c)
+{
+ struct super_block *sb = c->vfs_sb;
+ int err, mounted_read_only = (sb->s_flags & MS_RDONLY);
+ unsigned long long x;
+ size_t sz;
+
+ err = init_constants_early(c);
+ if (err)
+ return err;
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+ c->dbg_buf = vmalloc(c->leb_size);
+ if (!c->dbg_buf)
+ return -ENOMEM;
+#endif
+
+ err = check_volume_empty(c);
+ if (err)
+ goto out_free;
+
+ if (c->empty && (mounted_read_only || c->ro_media)) {
+ /*
+ * This UBI volume is empty, and read-only, or the file system
+ * is mounted read-only - we cannot format it.
+ */
+ ubifs_err("can't format empty UBI volume: read-only %s",
+ c->ro_media ? "UBI volume" : "mount");
+ err = -EROFS;
+ goto out_free;
+ }
+
+ if (c->ro_media && !mounted_read_only) {
+ ubifs_err("cannot mount read-write - read-only media");
+ err = -EROFS;
+ goto out_free;
+ }
+
+ /*
+ * The requirement for the buffer is that it should fit indexing B-tree
+ * height amount of integers. We assume the height if the TNC tree will
+ * never exceed 64.
+ */
+ err = -ENOMEM;
+ c->bottom_up_buf = kmalloc(BOTTOM_UP_HEIGHT * sizeof(int), GFP_KERNEL);
+ if (!c->bottom_up_buf)
+ goto out_free;
+
+ c->sbuf = vmalloc(c->leb_size);
+ if (!c->sbuf)
+ goto out_free;
+
+ if (!mounted_read_only) {
+ c->ileb_buf = vmalloc(c->leb_size);
+ if (!c->ileb_buf)
+ goto out_free;
+ }
+
+ err = ubifs_read_superblock(c);
+ if (err)
+ goto out_free;
+
+ /*
+ * Make sure the compressor which is set as the default on in the
+ * superblock was actually compiled in.
+ */
+ if (!ubifs_compr_present(c->default_compr)) {
+ ubifs_warn("'%s' compressor is set by superblock, but not "
+ "compiled in", ubifs_compr_name(c->default_compr));
+ c->default_compr = UBIFS_COMPR_NONE;
+ }
+
+ dbg_failure_mode_registration(c);
+
+ err = init_constants_late(c);
+ if (err)
+ goto out_dereg;
+
+ sz = ALIGN(c->max_idx_node_sz, c->min_io_size);
+ sz = ALIGN(sz + c->max_idx_node_sz, c->min_io_size);
+ c->cbuf = kmalloc(sz, GFP_NOFS);
+ if (!c->cbuf) {
+ err = -ENOMEM;
+ goto out_dereg;
+ }
+
+ if (!mounted_read_only) {
+ err = alloc_wbufs(c);
+ if (err)
+ goto out_cbuf;
+
+ /* Create background thread */
+ sprintf(c->bgt_name, BGT_NAME_PATTERN, c->vi.ubi_num,
+ c->vi.vol_id);
+ c->bgt = kthread_create(ubifs_bg_thread, c, c->bgt_name);
+ if (!c->bgt)
+ c->bgt = ERR_PTR(-EINVAL);
+ if (IS_ERR(c->bgt)) {
+ err = PTR_ERR(c->bgt);
+ c->bgt = NULL;
+ ubifs_err("cannot spawn \"%s\", error %d",
+ c->bgt_name, err);
+ goto out_wbufs;
+ }
+ wake_up_process(c->bgt);
+ }
+
+ err = ubifs_read_master(c);
+ if (err)
+ goto out_stop;
+
+ if ((c->mst_node->flags & cpu_to_le32(UBIFS_MST_DIRTY)) != 0) {
+ ubifs_msg("recovery needed");
+ c->need_recovery = 1;
+ if (!mounted_read_only) {
+ err = ubifs_recover_inl_heads(c, c->sbuf);
+ if (err)
+ goto out_master;
+ }
+ } else if (!mounted_read_only) {
+ /*
+ * Set the "dirty" flag so that if we reboot uncleanly we
+ * will notice this immediately on the next mount.
+ */
+ c->mst_node->flags |= cpu_to_le32(UBIFS_MST_DIRTY);
+ err = ubifs_write_master(c);
+ if (err)
+ goto out_master;
+ }
+
+ err = ubifs_lpt_init(c, 1, !mounted_read_only);
+ if (err)
+ goto out_lpt;
+
+ err = dbg_check_idx_size(c, c->old_idx_sz);
+ if (err)
+ goto out_lpt;
+
+ err = ubifs_replay_journal(c);
+ if (err)
+ goto out_journal;
+
+ err = ubifs_mount_orphans(c, c->need_recovery, mounted_read_only);
+ if (err)
+ goto out_orphans;
+
+ if (!mounted_read_only) {
+ int lnum;
+
+ /* Check for enough free space */
+ if (ubifs_calc_available(c) <= 0) {
+ ubifs_err("insufficient available space");
+ err = -EINVAL;
+ goto out_orphans;
+ }
+
+ /* Check for enough log space */
+ lnum = c->lhead_lnum + 1;
+ if (lnum >= UBIFS_LOG_LNUM + c->log_lebs)
+ lnum = UBIFS_LOG_LNUM;
+ if (lnum == c->ltail_lnum) {
+ err = ubifs_consolidate_log(c);
+ if (err)
+ goto out_orphans;
+ }
+
+ if (c->need_recovery) {
+ err = ubifs_recover_size(c);
+ if (err)
+ goto out_orphans;
+ err = ubifs_rcvry_gc_commit(c);
+ } else
+ err = take_gc_lnum(c);
+ if (err)
+ goto out_orphans;
+
+ err = dbg_check_lprops(c);
+ if (err)
+ goto out_orphans;
+ } else if (c->need_recovery) {
+ err = ubifs_recover_size(c);
+ if (err)
+ goto out_orphans;
+ }
+
+ spin_lock(&ubifs_infos_lock);
+ list_add_tail(&c->infos_list, &ubifs_infos);
+ spin_unlock(&ubifs_infos_lock);
+
+ if (c->need_recovery) {
+ if (mounted_read_only)
+ ubifs_msg("recovery deferred");
+ else {
+ c->need_recovery = 0;
+ ubifs_msg("recovery completed");
+ }
+ }
+
+ err = dbg_check_filesystem(c);
+ if (err)
+ goto out_infos;
+
+ ubifs_msg("mounted UBI device %d, volume %d", c->vi.ubi_num,
+ c->vi.vol_id);
+ if (mounted_read_only)
+ ubifs_msg("mounted read-only");
+ ubifs_msg("minimal I/O unit size: %d bytes", c->min_io_size);
+ ubifs_msg("logical eraseblock size: %d bytes (%d KiB)",
+ c->leb_size, c->leb_size / 1024);
+ x = (unsigned long long)c->main_lebs * c->leb_size;
+ ubifs_msg("file system size: %lld bytes (%lld KiB, %lld MiB, "
+ "%d LEBs)", x, x >> 10, x >> 20, c->main_lebs);
+ x = (unsigned long long)c->log_lebs * c->leb_size + c->max_bud_bytes;
+ ubifs_msg("journal size: %lld bytes (%lld KiB, %lld MiB, "
+ "%d LEBs)", x, x >> 10, x >> 20,
+ c->log_lebs + c->max_bud_cnt);
+ ubifs_msg("data journal heads: %d",
+ c->jhead_cnt - NONDATA_JHEADS_CNT);
+ ubifs_msg("default compressor: %s",
+ ubifs_compr_name(c->default_compr));
+ ubifs_msg("media format %d, latest format %d",
+ c->fmt_version, UBIFS_FORMAT_VERSION);
+
+ dbg_msg("compiled on: " __DATE__ " at " __TIME__);
+ dbg_msg("UUID: %02X%02X%02X%02X-%02X%02X"
+ "-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
+ c->uuid[0], c->uuid[1], c->uuid[2], c->uuid[3],
+ c->uuid[4], c->uuid[5], c->uuid[6], c->uuid[7],
+ c->uuid[8], c->uuid[9], c->uuid[10], c->uuid[11],
+ c->uuid[12], c->uuid[13], c->uuid[14], c->uuid[15]);
+ dbg_msg("fast unmount: %d", c->fast_unmount);
+ dbg_msg("big_lpt %d", c->big_lpt);
+ dbg_msg("log LEBs: %d (%d - %d)",
+ c->log_lebs, UBIFS_LOG_LNUM, c->log_last);
+ dbg_msg("LPT area LEBs: %d (%d - %d)",
+ c->lpt_lebs, c->lpt_first, c->lpt_last);
+ dbg_msg("orphan area LEBs: %d (%d - %d)",
+ c->orph_lebs, c->orph_first, c->orph_last);
+ dbg_msg("main area LEBs: %d (%d - %d)",
+ c->main_lebs, c->main_first, c->leb_cnt - 1);
+ dbg_msg("index LEBs: %d", c->lst.idx_lebs);
+ dbg_msg("total index bytes: %lld (%lld KiB, %lld MiB)",
+ c->old_idx_sz, c->old_idx_sz >> 10, c->old_idx_sz >> 20);
+ dbg_msg("key hash type: %d", c->key_hash_type);
+ dbg_msg("tree fanout: %d", c->fanout);
+ dbg_msg("reserved GC LEB: %d", c->gc_lnum);
+ dbg_msg("first main LEB: %d", c->main_first);
+ dbg_msg("dead watermark: %d", c->dead_wm);
+ dbg_msg("dark watermark: %d", c->dark_wm);
+ x = c->main_lebs * c->dark_wm;
+ dbg_msg("max. dark space: %lld (%lld KiB, %lld MiB)",
+ x, x >> 10, x >> 20);
+ dbg_msg("maximum bud bytes: %lld (%lld KiB, %lld MiB)",
+ c->max_bud_bytes, c->max_bud_bytes >> 10,
+ c->max_bud_bytes >> 20);
+ dbg_msg("BG commit bud bytes: %lld (%lld KiB, %lld MiB)",
+ c->bg_bud_bytes, c->bg_bud_bytes >> 10,
+ c->bg_bud_bytes >> 20);
+ dbg_msg("current bud bytes %lld (%lld KiB, %lld MiB)",
+ c->bud_bytes, c->bud_bytes >> 10, c->bud_bytes >> 20);
+ dbg_msg("max. seq. number: %llu", c->max_sqnum);
+ dbg_msg("commit number: %llu", c->cmt_no);
+
+ return 0;
+
+out_infos:
+ spin_lock(&ubifs_infos_lock);
+ list_del(&c->infos_list);
+ spin_unlock(&ubifs_infos_lock);
+out_orphans:
+ free_orphans(c);
+out_journal:
+ destroy_journal(c);
+out_lpt:
+ ubifs_lpt_free(c, 0);
+out_master:
+ kfree(c->mst_node);
+ kfree(c->rcvrd_mst_node);
+out_stop:
+ if (c->bgt)
+ kthread_stop(c->bgt);
+out_wbufs:
+ free_wbufs(c);
+out_cbuf:
+ kfree(c->cbuf);
+out_dereg:
+ dbg_failure_mode_deregistration(c);
+out_free:
+ vfree(c->ileb_buf);
+ vfree(c->sbuf);
+ kfree(c->bottom_up_buf);
+ UBIFS_DBG(vfree(c->dbg_buf));
+ return err;
+}
+
+/**
+ * ubifs_umount - un-mount UBIFS file-system.
+ * @c: UBIFS file-system description object
+ *
+ * Note, this function is called to free allocated resourced when un-mounting,
+ * as well as free resources when an error occurred while we were half way
+ * through mounting (error path cleanup function). So it has to make sure the
+ * resource was actually allocated before freeing it.
+ */
+static void ubifs_umount(struct ubifs_info *c)
+{
+ dbg_gen("un-mounting UBI device %d, volume %d", c->vi.ubi_num,
+ c->vi.vol_id);
+
+ spin_lock(&ubifs_infos_lock);
+ list_del(&c->infos_list);
+ spin_unlock(&ubifs_infos_lock);
+
+ if (c->bgt)
+ kthread_stop(c->bgt);
+
+ destroy_journal(c);
+ free_wbufs(c);
+ free_orphans(c);
+ ubifs_lpt_free(c, 0);
+
+ kfree(c->cbuf);
+ kfree(c->rcvrd_mst_node);
+ kfree(c->mst_node);
+ vfree(c->sbuf);
+ kfree(c->bottom_up_buf);
+ UBIFS_DBG(vfree(c->dbg_buf));
+ vfree(c->ileb_buf);
+ dbg_failure_mode_deregistration(c);
+}
+
+/**
+ * ubifs_remount_rw - re-mount in read-write mode.
+ * @c: UBIFS file-system description object
+ *
+ * UBIFS avoids allocating many unnecessary resources when mounted in read-only
+ * mode. This function allocates the needed resources and re-mounts UBIFS in
+ * read-write mode.
+ */
+static int ubifs_remount_rw(struct ubifs_info *c)
+{
+ int err, lnum;
+
+ if (c->ro_media)
+ return -EINVAL;
+
+ mutex_lock(&c->umount_mutex);
+ c->remounting_rw = 1;
+
+ /* Check for enough free space */
+ if (ubifs_calc_available(c) <= 0) {
+ ubifs_err("insufficient available space");
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (c->old_leb_cnt != c->leb_cnt) {
+ struct ubifs_sb_node *sup;
+
+ sup = ubifs_read_sb_node(c);
+ if (IS_ERR(sup)) {
+ err = PTR_ERR(sup);
+ goto out;
+ }
+ sup->leb_cnt = cpu_to_le32(c->leb_cnt);
+ err = ubifs_write_sb_node(c, sup);
+ if (err)
+ goto out;
+ }
+
+ if (c->need_recovery) {
+ ubifs_msg("completing deferred recovery");
+ err = ubifs_write_rcvrd_mst_node(c);
+ if (err)
+ goto out;
+ err = ubifs_recover_size(c);
+ if (err)
+ goto out;
+ err = ubifs_clean_lebs(c, c->sbuf);
+ if (err)
+ goto out;
+ err = ubifs_recover_inl_heads(c, c->sbuf);
+ if (err)
+ goto out;
+ }
+
+ if (!(c->mst_node->flags & cpu_to_le32(UBIFS_MST_DIRTY))) {
+ c->mst_node->flags |= cpu_to_le32(UBIFS_MST_DIRTY);
+ err = ubifs_write_master(c);
+ if (err)
+ goto out;
+ }
+
+ c->ileb_buf = vmalloc(c->leb_size);
+ if (!c->ileb_buf) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ err = ubifs_lpt_init(c, 0, 1);
+ if (err)
+ goto out;
+
+ err = alloc_wbufs(c);
+ if (err)
+ goto out;
+
+ ubifs_create_buds_lists(c);
+
+ /* Create background thread */
+ c->bgt = kthread_create(ubifs_bg_thread, c, c->bgt_name);
+ if (!c->bgt)
+ c->bgt = ERR_PTR(-EINVAL);
+ if (IS_ERR(c->bgt)) {
+ err = PTR_ERR(c->bgt);
+ c->bgt = NULL;
+ ubifs_err("cannot spawn \"%s\", error %d",
+ c->bgt_name, err);
+ return err;
+ }
+ wake_up_process(c->bgt);
+
+ c->orph_buf = vmalloc(c->leb_size);
+ if (!c->orph_buf)
+ return -ENOMEM;
+
+ /* Check for enough log space */
+ lnum = c->lhead_lnum + 1;
+ if (lnum >= UBIFS_LOG_LNUM + c->log_lebs)
+ lnum = UBIFS_LOG_LNUM;
+ if (lnum == c->ltail_lnum) {
+ err = ubifs_consolidate_log(c);
+ if (err)
+ goto out;
+ }
+
+ if (c->need_recovery)
+ err = ubifs_rcvry_gc_commit(c);
+ else
+ err = take_gc_lnum(c);
+ if (err)
+ goto out;
+
+ if (c->need_recovery) {
+ c->need_recovery = 0;
+ ubifs_msg("deferred recovery completed");
+ }
+
+ dbg_gen("re-mounted read-write");
+ c->vfs_sb->s_flags &= ~MS_RDONLY;
+ c->remounting_rw = 0;
+ mutex_unlock(&c->umount_mutex);
+ return 0;
+
+out:
+ vfree(c->orph_buf);
+ c->orph_buf = NULL;
+ if (c->bgt) {
+ kthread_stop(c->bgt);
+ c->bgt = NULL;
+ }
+ free_wbufs(c);
+ vfree(c->ileb_buf);
+ c->ileb_buf = NULL;
+ ubifs_lpt_free(c, 1);
+ c->remounting_rw = 0;
+ mutex_unlock(&c->umount_mutex);
+ return err;
+}
+
+/**
+ * commit_on_unmount - commit the journal when un-mounting.
+ * @c: UBIFS file-system description object
+ *
+ * This function is called during un-mounting and it commits the journal unless
+ * the "fast unmount" mode is enabled. It also avoids committing the journal if
+ * it contains too few data.
+ *
+ * Sometimes recovery requires the journal to be committed at least once, and
+ * this function takes care about this.
+ */
+static void commit_on_unmount(struct ubifs_info *c)
+{
+ if (!c->fast_unmount) {
+ long long bud_bytes;
+
+ spin_lock(&c->buds_lock);
+ bud_bytes = c->bud_bytes;
+ spin_unlock(&c->buds_lock);
+ if (bud_bytes > c->leb_size)
+ ubifs_run_commit(c);
+ }
+}
+
+/**
+ * ubifs_remount_ro - re-mount in read-only mode.
+ * @c: UBIFS file-system description object
+ *
+ * We rely on VFS to have stopped writing. Possibly the background thread could
+ * be running a commit, however kthread_stop will wait in that case.
+ */
+static void ubifs_remount_ro(struct ubifs_info *c)
+{
+ int i, err;
+
+ ubifs_assert(!c->need_recovery);
+ commit_on_unmount(c);
+
+ mutex_lock(&c->umount_mutex);
+ if (c->bgt) {
+ kthread_stop(c->bgt);
+ c->bgt = NULL;
+ }
+
+ for (i = 0; i < c->jhead_cnt; i++) {
+ ubifs_wbuf_sync(&c->jheads[i].wbuf);
+ del_timer_sync(&c->jheads[i].wbuf.timer);
+ }
+
+ if (!c->ro_media) {
+ c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_DIRTY);
+ c->mst_node->flags |= cpu_to_le32(UBIFS_MST_NO_ORPHS);
+ c->mst_node->gc_lnum = cpu_to_le32(c->gc_lnum);
+ err = ubifs_write_master(c);
+ if (err)
+ ubifs_ro_mode(c, err);
+ }
+
+ ubifs_destroy_idx_gc(c);
+ free_wbufs(c);
+ vfree(c->orph_buf);
+ c->orph_buf = NULL;
+ vfree(c->ileb_buf);
+ c->ileb_buf = NULL;
+ ubifs_lpt_free(c, 1);
+ mutex_unlock(&c->umount_mutex);
+}
+
+static void ubifs_put_super(struct super_block *sb)
+{
+ int i;
+ struct ubifs_info *c = sb->s_fs_info;
+
+ ubifs_msg("un-mount UBI device %d, volume %d", c->vi.ubi_num,
+ c->vi.vol_id);
+ /*
+ * The following asserts are only valid if there has not been a failure
+ * of the media. For example, there will be dirty inodes if we failed
+ * to write them back because of I/O errors.
+ */
+ ubifs_assert(atomic_long_read(&c->dirty_pg_cnt) == 0);
+ ubifs_assert(atomic_long_read(&c->dirty_ino_cnt) == 0);
+ ubifs_assert(c->budg_idx_growth == 0);
+ ubifs_assert(c->budg_data_growth == 0);
+
+ /*
+ * The 'c->umount_lock' prevents races between UBIFS memory shrinker
+ * and file system un-mount. Namely, it prevents the shrinker from
+ * picking this superblock for shrinking - it will be just skipped if
+ * the mutex is locked.
+ */
+ mutex_lock(&c->umount_mutex);
+ if (!(c->vfs_sb->s_flags & MS_RDONLY)) {
+ /*
+ * First of all kill the background thread to make sure it does
+ * not interfere with un-mounting and freeing resources.
+ */
+ if (c->bgt) {
+ kthread_stop(c->bgt);
+ c->bgt = NULL;
+ }
+
+ /* Synchronize write-buffers */
+ if (c->jheads)
+ for (i = 0; i < c->jhead_cnt; i++) {
+ ubifs_wbuf_sync(&c->jheads[i].wbuf);
+ del_timer_sync(&c->jheads[i].wbuf.timer);
+ }
+
+ /*
+ * On fatal errors c->ro_media is set to 1, in which case we do
+ * not write the master node.
+ */
+ if (!c->ro_media) {
+ /*
+ * We are being cleanly unmounted which means the
+ * orphans were killed - indicate this in the master
+ * node. Also save the reserved GC LEB number.
+ */
+ int err;
+
+ c->mst_node->flags &= ~cpu_to_le32(UBIFS_MST_DIRTY);
+ c->mst_node->flags |= cpu_to_le32(UBIFS_MST_NO_ORPHS);
+ c->mst_node->gc_lnum = cpu_to_le32(c->gc_lnum);
+ err = ubifs_write_master(c);
+ if (err)
+ /*
+ * Recovery will attempt to fix the master area
+ * next mount, so we just print a message and
+ * continue to unmount normally.
+ */
+ ubifs_err("failed to write master node, "
+ "error %d", err);
+ }
+ }
+
+ ubifs_umount(c);
+ ubi_close_volume(c->ubi);
+ mutex_unlock(&c->umount_mutex);
+ kfree(c);
+}
+
+static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
+{
+ int err;
+ struct ubifs_info *c = sb->s_fs_info;
+
+ dbg_gen("old flags %#lx, new flags %#x", sb->s_flags, *flags);
+
+ err = ubifs_parse_options(c, data, 1);
+ if (err) {
+ ubifs_err("invalid or unknown remount parameter");
+ return err;
+ }
+ if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
+ err = ubifs_remount_rw(c);
+ if (err)
+ return err;
+ } else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY))
+ ubifs_remount_ro(c);
+
+ return 0;
+}
+
+struct super_operations ubifs_super_operations = {
+ .alloc_inode = ubifs_alloc_inode,
+ .destroy_inode = ubifs_destroy_inode,
+ .put_super = ubifs_put_super,
+ .write_inode = ubifs_write_inode,
+ .delete_inode = ubifs_delete_inode,
+ .statfs = ubifs_statfs,
+ .dirty_inode = ubifs_dirty_inode,
+ .remount_fs = ubifs_remount_fs,
+ .show_options = ubifs_show_options,
+ .sync_fs = ubifs_sync_fs,
+};
+
+/**
+ * open_ubi - parse UBI device name string and open the UBI device.
+ * @name: UBI volume name
+ * @mode: UBI volume open mode
+ *
+ * There are several ways to specify UBI volumes when mounting UBIFS:
+ * o ubiX_Y - UBI device number X, volume Y;
+ * o ubiY - UBI device number 0, volume Y;
+ * o ubiX:NAME - mount UBI device X, volume with name NAME;
+ * o ubi:NAME - mount UBI device 0, volume with name NAME.
+ *
+ * Alternative '!' separator may be used instead of ':' (because some shells
+ * like busybox may interpret ':' as an NFS host name separator). This function
+ * returns ubi volume object in case of success and a negative error code in
+ * case of failure.
+ */
+static struct ubi_volume_desc *open_ubi(const char *name, int mode)
+{
+ int dev, vol;
+ char *endptr;
+
+ if (name[0] != 'u' || name[1] != 'b' || name[2] != 'i')
+ return ERR_PTR(-EINVAL);
+
+ /* ubi:NAME method */
+ if ((name[3] == ':' || name[3] == '!') && name[4] != '\0')
+ return ubi_open_volume_nm(0, name + 4, mode);
+
+ if (!isdigit(name[3]))
+ return ERR_PTR(-EINVAL);
+
+ dev = simple_strtoul(name + 3, &endptr, 0);
+
+ /* ubiY method */
+ if (*endptr == '\0')
+ return ubi_open_volume(0, dev, mode);
+
+ /* ubiX_Y method */
+ if (*endptr == '_' && isdigit(endptr[1])) {
+ vol = simple_strtoul(endptr + 1, &endptr, 0);
+ if (*endptr != '\0')
+ return ERR_PTR(-EINVAL);
+ return ubi_open_volume(dev, vol, mode);
+ }
+
+ /* ubiX:NAME method */
+ if ((*endptr == ':' || *endptr == '!') && endptr[1] != '\0')
+ return ubi_open_volume_nm(dev, ++endptr, mode);
+
+ return ERR_PTR(-EINVAL);
+}
+
+static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
+{
+ struct ubi_volume_desc *ubi = sb->s_fs_info;
+ struct ubifs_info *c;
+ struct inode *root;
+ int err;
+
+ c = kzalloc(sizeof(struct ubifs_info), GFP_KERNEL);
+ if (!c)
+ return -ENOMEM;
+
+ spin_lock_init(&c->cnt_lock);
+ spin_lock_init(&c->cs_lock);
+ spin_lock_init(&c->buds_lock);
+ spin_lock_init(&c->space_lock);
+ spin_lock_init(&c->orphan_lock);
+ init_rwsem(&c->commit_sem);
+ mutex_init(&c->lp_mutex);
+ mutex_init(&c->tnc_mutex);
+ mutex_init(&c->log_mutex);
+ mutex_init(&c->mst_mutex);
+ mutex_init(&c->umount_mutex);
+ init_waitqueue_head(&c->cmt_wq);
+ c->buds = RB_ROOT;
+ c->old_idx = RB_ROOT;
+ c->size_tree = RB_ROOT;
+ c->orph_tree = RB_ROOT;
+ INIT_LIST_HEAD(&c->infos_list);
+ INIT_LIST_HEAD(&c->idx_gc);
+ INIT_LIST_HEAD(&c->replay_list);
+ INIT_LIST_HEAD(&c->replay_buds);
+ INIT_LIST_HEAD(&c->uncat_list);
+ INIT_LIST_HEAD(&c->empty_list);
+ INIT_LIST_HEAD(&c->freeable_list);
+ INIT_LIST_HEAD(&c->frdi_idx_list);
+ INIT_LIST_HEAD(&c->unclean_leb_list);
+ INIT_LIST_HEAD(&c->old_buds);
+ INIT_LIST_HEAD(&c->orph_list);
+ INIT_LIST_HEAD(&c->orph_new);
+
+ c->highest_inum = UBIFS_FIRST_INO;
+ get_random_bytes(&c->vfs_gen, sizeof(int));
+ c->lhead_lnum = c->ltail_lnum = UBIFS_LOG_LNUM;
+
+ ubi_get_volume_info(ubi, &c->vi);
+ ubi_get_device_info(c->vi.ubi_num, &c->di);
+
+ /* Re-open the UBI device in read-write mode */
+ c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READWRITE);
+ if (IS_ERR(c->ubi)) {
+ err = PTR_ERR(c->ubi);
+ goto out_free;
+ }
+
+ err = ubifs_parse_options(c, data, 0);
+ if (err)
+ goto out_close;
+
+ c->vfs_sb = sb;
+
+ sb->s_fs_info = c;
+ sb->s_magic = UBIFS_SUPER_MAGIC;
+ sb->s_blocksize = UBIFS_BLOCK_SIZE;
+ sb->s_blocksize_bits = UBIFS_BLOCK_SHIFT;
+ sb->s_dev = c->vi.cdev;
+ sb->s_maxbytes = c->max_inode_sz = key_max_inode_size(c);
+ if (c->max_inode_sz > MAX_LFS_FILESIZE)
+ sb->s_maxbytes = c->max_inode_sz = MAX_LFS_FILESIZE;
+ sb->s_op = &ubifs_super_operations;
+
+ mutex_lock(&c->umount_mutex);
+ err = mount_ubifs(c);
+ if (err) {
+ ubifs_assert(err < 0);
+ goto out_unlock;
+ }
+
+ /* Read the root inode */
+ root = ubifs_iget(sb, UBIFS_ROOT_INO);
+ if (IS_ERR(root)) {
+ err = PTR_ERR(root);
+ goto out_umount;
+ }
+
+ sb->s_root = d_alloc_root(root);
+ if (!sb->s_root)
+ goto out_iput;
+
+ mutex_unlock(&c->umount_mutex);
+
+ return 0;
+
+out_iput:
+ iput(root);
+out_umount:
+ ubifs_umount(c);
+out_unlock:
+ mutex_unlock(&c->umount_mutex);
+out_close:
+ ubi_close_volume(c->ubi);
+out_free:
+ kfree(c);
+ return err;
+}
+
+static int sb_test(struct super_block *sb, void *data)
+{
+ dev_t *dev = data;
+
+ return sb->s_dev == *dev;
+}
+
+static int sb_set(struct super_block *sb, void *data)
+{
+ dev_t *dev = data;
+
+ sb->s_dev = *dev;
+ return 0;
+}
+
+static int ubifs_get_sb(struct file_system_type *fs_type, int flags,
+ const char *name, void *data, struct vfsmount *mnt)
+{
+ struct ubi_volume_desc *ubi;
+ struct ubi_volume_info vi;
+ struct super_block *sb;
+ int err;
+
+ dbg_gen("name %s, flags %#x", name, flags);
+
+ /*
+ * Get UBI device number and volume ID. Mount it read-only so far
+ * because this might be a new mount point, and UBI allows only one
+ * read-write user at a time.
+ */
+ ubi = open_ubi(name, UBI_READONLY);
+ if (IS_ERR(ubi)) {
+ ubifs_err("cannot open \"%s\", error %d",
+ name, (int)PTR_ERR(ubi));
+ return PTR_ERR(ubi);
+ }
+ ubi_get_volume_info(ubi, &vi);
+
+ dbg_gen("opened ubi%d_%d", vi.ubi_num, vi.vol_id);
+
+ sb = sget(fs_type, &sb_test, &sb_set, &vi.cdev);
+ if (IS_ERR(sb)) {
+ err = PTR_ERR(sb);
+ goto out_close;
+ }
+
+ if (sb->s_root) {
+ /* A new mount point for already mounted UBIFS */
+ dbg_gen("this ubi volume is already mounted");
+ if ((flags ^ sb->s_flags) & MS_RDONLY) {
+ err = -EBUSY;
+ goto out_deact;
+ }
+ } else {
+ sb->s_flags = flags;
+ /*
+ * Pass 'ubi' to 'fill_super()' in sb->s_fs_info where it is
+ * replaced by 'c'.
+ */
+ sb->s_fs_info = ubi;
+ err = ubifs_fill_super(sb, data, flags & MS_SILENT ? 1 : 0);
+ if (err)
+ goto out_deact;
+ /* We do not support atime */
+ sb->s_flags |= MS_ACTIVE | MS_NOATIME;
+ }
+
+ /* 'fill_super()' opens ubi again so we must close it here */
+ ubi_close_volume(ubi);
+
+ return simple_set_mnt(mnt, sb);
+
+out_deact:
+ up_write(&sb->s_umount);
+ deactivate_super(sb);
+out_close:
+ ubi_close_volume(ubi);
+ return err;
+}
+
+static void ubifs_kill_sb(struct super_block *sb)
+{
+ struct ubifs_info *c = sb->s_fs_info;
+
+ /*
+ * We do 'commit_on_unmount()' here instead of 'ubifs_put_super()'
+ * in order to be outside BKL.
+ */
+ if (sb->s_root && !(sb->s_flags & MS_RDONLY))
+ commit_on_unmount(c);
+ /* The un-mount routine is actually done in put_super() */
+ generic_shutdown_super(sb);
+}
+
+static struct file_system_type ubifs_fs_type = {
+ .name = "ubifs",
+ .owner = THIS_MODULE,
+ .get_sb = ubifs_get_sb,
+ .kill_sb = ubifs_kill_sb
+};
+
+/*
+ * Inode slab cache constructor.
+ */
+static void inode_slab_ctor(struct kmem_cache *cachep, void *obj)
+{
+ struct ubifs_inode *inode = obj;
+ inode_init_once(&inode->vfs_inode);
+}
+
+static int __init ubifs_init(void)
+{
+ int err;
+
+ BUILD_BUG_ON(sizeof(struct ubifs_ch) != 24);
+
+ /* Make sure node sizes are 8-byte aligned */
+ BUILD_BUG_ON(UBIFS_CH_SZ & 7);
+ BUILD_BUG_ON(UBIFS_INO_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_DENT_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_XENT_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_DATA_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_TRUN_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_SB_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_MST_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_REF_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_CS_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_ORPH_NODE_SZ & 7);
+
+ BUILD_BUG_ON(UBIFS_MAX_DENT_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_MAX_XENT_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_MAX_DATA_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_MAX_INO_NODE_SZ & 7);
+ BUILD_BUG_ON(UBIFS_MAX_NODE_SZ & 7);
+ BUILD_BUG_ON(MIN_WRITE_SZ & 7);
+
+ /* Check min. node size */
+ BUILD_BUG_ON(UBIFS_INO_NODE_SZ < MIN_WRITE_SZ);
+ BUILD_BUG_ON(UBIFS_DENT_NODE_SZ < MIN_WRITE_SZ);
+ BUILD_BUG_ON(UBIFS_XENT_NODE_SZ < MIN_WRITE_SZ);
+ BUILD_BUG_ON(UBIFS_TRUN_NODE_SZ < MIN_WRITE_SZ);
+
+ BUILD_BUG_ON(UBIFS_MAX_DENT_NODE_SZ > UBIFS_MAX_NODE_SZ);
+ BUILD_BUG_ON(UBIFS_MAX_XENT_NODE_SZ > UBIFS_MAX_NODE_SZ);
+ BUILD_BUG_ON(UBIFS_MAX_DATA_NODE_SZ > UBIFS_MAX_NODE_SZ);
+ BUILD_BUG_ON(UBIFS_MAX_INO_NODE_SZ > UBIFS_MAX_NODE_SZ);
+
+ /* Defined node sizes */
+ BUILD_BUG_ON(UBIFS_SB_NODE_SZ != 4096);
+ BUILD_BUG_ON(UBIFS_MST_NODE_SZ != 512);
+ BUILD_BUG_ON(UBIFS_INO_NODE_SZ != 160);
+ BUILD_BUG_ON(UBIFS_REF_NODE_SZ != 64);
+
+ /*
+ * We require that PAGE_CACHE_SIZE is greater-than-or-equal-to
+ * UBIFS_BLOCK_SIZE. It is assumed that both are powers of 2.
+ */
+ if (PAGE_CACHE_SIZE < UBIFS_BLOCK_SIZE) {
+ ubifs_err("VFS page cache size is %u bytes, but UBIFS requires"
+ " at least 4096 bytes",
+ (unsigned int)PAGE_CACHE_SIZE);
+ return -EINVAL;
+ }
+
+ err = bdi_init(&ubifs_backing_dev_info);
+ if (err)
+ return err;
+
+ err = register_filesystem(&ubifs_fs_type);
+ if (err) {
+ ubifs_err("cannot register file system, error %d", err);
+ goto out;
+ }
+
+ err = -ENOMEM;
+ ubifs_inode_slab = kmem_cache_create("ubifs_inode_slab",
+ sizeof(struct ubifs_inode), 0,
+ SLAB_MEM_SPREAD | SLAB_RECLAIM_ACCOUNT,
+ &inode_slab_ctor);
+ if (!ubifs_inode_slab)
+ goto out_reg;
+
+ register_shrinker(&ubifs_shrinker_info);
+
+ err = ubifs_compressors_init();
+ if (err)
+ goto out_compr;
+
+ return 0;
+
+out_compr:
+ unregister_shrinker(&ubifs_shrinker_info);
+ kmem_cache_destroy(ubifs_inode_slab);
+out_reg:
+ unregister_filesystem(&ubifs_fs_type);
+out:
+ bdi_destroy(&ubifs_backing_dev_info);
+ return err;
+}
+/* late_initcall to let compressors initialize first */
+late_initcall(ubifs_init);
+
+static void __exit ubifs_exit(void)
+{
+ ubifs_assert(list_empty(&ubifs_infos));
+ ubifs_assert(atomic_long_read(&ubifs_clean_zn_cnt) == 0);
+
+ ubifs_compressors_exit();
+ unregister_shrinker(&ubifs_shrinker_info);
+ kmem_cache_destroy(ubifs_inode_slab);
+ unregister_filesystem(&ubifs_fs_type);
+ bdi_destroy(&ubifs_backing_dev_info);
+}
+module_exit(ubifs_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION(__stringify(UBIFS_VERSION));
+MODULE_AUTHOR("Artem Bityutskiy, Adrian Hunter");
+MODULE_DESCRIPTION("UBIFS - UBI File System");
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/tnc.c avr32-2.6/fs/ubifs/tnc.c
--- linux-2.6.25.6/fs/ubifs/tnc.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/tnc.c 2008-06-12 15:09:45.600758286 +0200
@@ -0,0 +1,2961 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file implements TNC (Tree Node Cache) which caches indexing nodes of
+ * the UBIFS B-tree.
+ *
+ * At the moment the locking rules of the TNC tree are quite simple and
+ * straightforward. We just have a mutex and lock it when we traverse the
+ * tree. If a znode is not in memory, we read it from flash while still having
+ * the mutex locked.
+ */
+
+#include <linux/crc32.h>
+#include "ubifs.h"
+
+/*
+ * Returned codes of 'matches_name()' and 'fallible_matches_name()' functions.
+ * @NAME_LESS: name corresponding to the first argument is less than second
+ * @NAME_MATCHES: names match
+ * @NAME_GREATER: name corresponding to the second argument is greater than
+ * first
+ * @NOT_ON_MEDIA: node referred by zbranch does not exist on the media
+ *
+ * These constants were introduce to improve readability.
+ */
+enum {
+ NAME_LESS = 0,
+ NAME_MATCHES = 1,
+ NAME_GREATER = 2,
+ NOT_ON_MEDIA = 3,
+};
+
+/**
+ * insert_old_idx - record an index node obsoleted since the last commit start.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number of obsoleted index node
+ * @offs: offset of obsoleted index node
+ *
+ * Returns %0 on success, and a negative error code on failure.
+ *
+ * For recovery, there must always be a complete intact version of the index on
+ * flash at all times. That is called the "old index". It is the index as at the
+ * time of the last successful commit. Many of the index nodes in the old index
+ * may be dirty, but they must not be erased until the next successful commit
+ * (at which point that index becomes the old index).
+ *
+ * That means that the garbage collection and the in-the-gaps method of
+ * committing must be able to determine if an index node is in the old index.
+ * Most of the old index nodes can be found by looking up the TNC using the
+ * 'lookup_znode()' function. However, some of the old index nodes may have
+ * been deleted from the current index or may have been changed so much that
+ * they cannot be easily found. In those cases, an entry is added to an RB-tree.
+ * That is what this function does. The RB-tree is ordered by LEB number and
+ * offset because they uniquely identify the old index node.
+ */
+static int insert_old_idx(struct ubifs_info *c, int lnum, int offs)
+{
+ struct ubifs_old_idx *old_idx, *o;
+ struct rb_node **p, *parent = NULL;
+
+ old_idx = kmalloc(sizeof(struct ubifs_old_idx), GFP_NOFS);
+ if (unlikely(!old_idx))
+ return -ENOMEM;
+ old_idx->lnum = lnum;
+ old_idx->offs = offs;
+
+ p = &c->old_idx.rb_node;
+ while (*p) {
+ parent = *p;
+ o = rb_entry(parent, struct ubifs_old_idx, rb);
+ if (lnum < o->lnum)
+ p = &(*p)->rb_left;
+ else if (lnum > o->lnum)
+ p = &(*p)->rb_right;
+ else if (offs < o->offs)
+ p = &(*p)->rb_left;
+ else if (offs > o->offs)
+ p = &(*p)->rb_right;
+ else {
+ ubifs_err("old idx added twice!");
+ kfree(old_idx);
+ return 0;
+ }
+ }
+ rb_link_node(&old_idx->rb, parent, p);
+ rb_insert_color(&old_idx->rb, &c->old_idx);
+ return 0;
+}
+
+/**
+ * insert_old_idx_znode - record a znode obsoleted since last commit start.
+ * @c: UBIFS file-system description object
+ * @znode: znode of obsoleted index node
+ *
+ * Returns %0 on success, and a negative error code on failure.
+ */
+int insert_old_idx_znode(struct ubifs_info *c, struct ubifs_znode *znode)
+{
+ if (znode->parent) {
+ struct ubifs_zbranch *zbr;
+
+ zbr = &znode->parent->zbranch[znode->iip];
+ if (zbr->len)
+ return insert_old_idx(c, zbr->lnum, zbr->offs);
+ } else
+ if (c->zroot.len)
+ return insert_old_idx(c, c->zroot.lnum,
+ c->zroot.offs);
+ return 0;
+}
+
+/**
+ * ins_clr_old_idx_znode - record a znode obsoleted since last commit start.
+ * @c: UBIFS file-system description object
+ * @znode: znode of obsoleted index node
+ *
+ * Returns %0 on success, and a negative error code on failure.
+ */
+static int ins_clr_old_idx_znode(struct ubifs_info *c,
+ struct ubifs_znode *znode)
+{
+ int err;
+
+ if (znode->parent) {
+ struct ubifs_zbranch *zbr;
+
+ zbr = &znode->parent->zbranch[znode->iip];
+ if (zbr->len) {
+ err = insert_old_idx(c, zbr->lnum, zbr->offs);
+ if (err)
+ return err;
+ zbr->lnum = 0;
+ zbr->offs = 0;
+ zbr->len = 0;
+ }
+ } else
+ if (c->zroot.len) {
+ err = insert_old_idx(c, c->zroot.lnum, c->zroot.offs);
+ if (err)
+ return err;
+ c->zroot.lnum = 0;
+ c->zroot.offs = 0;
+ c->zroot.len = 0;
+ }
+ return 0;
+}
+
+/**
+ * destroy_old_idx - destroy the old_idx RB-tree.
+ * @c: UBIFS file-system description object
+ *
+ * During start commit, the old_idx RB-tree is used to avoid overwriting index
+ * nodes that were in the index last commit but have since been deleted. This
+ * is necessary for recovery i.e. the old index must be kept intact until the
+ * new index is successfully written. The old-idx RB-tree is used for the
+ * in-the-gaps method of writing index nodes and is destroyed every commit.
+ */
+void destroy_old_idx(struct ubifs_info *c)
+{
+ struct rb_node *this = c->old_idx.rb_node;
+ struct ubifs_old_idx *old_idx;
+
+ while (this) {
+ if (this->rb_left) {
+ this = this->rb_left;
+ continue;
+ } else if (this->rb_right) {
+ this = this->rb_right;
+ continue;
+ }
+ old_idx = rb_entry(this, struct ubifs_old_idx, rb);
+ this = rb_parent(this);
+ if (this) {
+ if (this->rb_left == &old_idx->rb)
+ this->rb_left = NULL;
+ else
+ this->rb_right = NULL;
+ }
+ kfree(old_idx);
+ }
+ c->old_idx = RB_ROOT;
+}
+
+/**
+ * copy_znode - copy a dirty znode.
+ * @c: UBIFS file-system description object
+ * @znode: znode to copy
+ *
+ * A dirty znode being committed may not be changed, so it is copied.
+ */
+static struct ubifs_znode *copy_znode(struct ubifs_info *c,
+ struct ubifs_znode *znode)
+{
+ struct ubifs_znode *zn;
+
+ zn = kmalloc(c->max_znode_sz, GFP_NOFS);
+ if (unlikely(!zn))
+ return ERR_PTR(-ENOMEM);
+
+ memcpy(zn, znode, c->max_znode_sz);
+ zn->cnext = NULL;
+ __set_bit(DIRTY_ZNODE, &zn->flags);
+ __clear_bit(COW_ZNODE, &zn->flags);
+
+ ubifs_assert(!test_bit(OBSOLETE_ZNODE, &znode->flags));
+ __set_bit(OBSOLETE_ZNODE, &znode->flags);
+
+ if (znode->level != 0) {
+ int i;
+ const int n = zn->child_cnt;
+
+ /* The children now have new parent */
+ for (i = 0; i < n; i++) {
+ struct ubifs_zbranch *zbr = &zn->zbranch[i];
+
+ if (zbr->znode)
+ zbr->znode->parent = zn;
+ }
+ }
+
+ atomic_long_inc(&c->dirty_zn_cnt);
+ return zn;
+}
+
+/**
+ * add_idx_dirt - add dirt due to a dirty znode.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number of index node
+ * @dirt: size of index node
+ *
+ * This function updates lprops dirty space and the new size of the index.
+ */
+static int add_idx_dirt(struct ubifs_info *c, int lnum, int dirt)
+{
+ c->calc_idx_sz -= ALIGN(dirt, 8);
+ return ubifs_add_dirt(c, lnum, dirt);
+}
+
+/**
+ * dirty_cow_znode - ensure a znode is not being committed.
+ * @c: UBIFS file-system description object
+ * @zbr: branch of znode to check
+ *
+ * Returns dirtied znode on success or negative error code on failure.
+ */
+static struct ubifs_znode *dirty_cow_znode(struct ubifs_info *c,
+ struct ubifs_zbranch *zbr)
+{
+ struct ubifs_znode *znode = zbr->znode;
+ struct ubifs_znode *zn;
+ int err;
+
+ if (!test_bit(COW_ZNODE, &znode->flags)) {
+ /* znode is not being committed */
+ if (!test_and_set_bit(DIRTY_ZNODE, &znode->flags)) {
+ atomic_long_inc(&c->dirty_zn_cnt);
+ atomic_long_dec(&c->clean_zn_cnt);
+ atomic_long_dec(&ubifs_clean_zn_cnt);
+ err = add_idx_dirt(c, zbr->lnum, zbr->len);
+ if (unlikely(err))
+ return ERR_PTR(err);
+ }
+ return znode;
+ }
+
+ zn = copy_znode(c, znode);
+ if (unlikely(IS_ERR(zn)))
+ return zn;
+
+ if (zbr->len) {
+ err = insert_old_idx(c, zbr->lnum, zbr->offs);
+ if (unlikely(err))
+ return ERR_PTR(err);
+ err = add_idx_dirt(c, zbr->lnum, zbr->len);
+ } else
+ err = 0;
+
+ zbr->znode = zn;
+ zbr->lnum = 0;
+ zbr->offs = 0;
+ zbr->len = 0;
+
+ if (unlikely(err))
+ return ERR_PTR(err);
+ return zn;
+}
+
+/**
+ * lnc_add - add a leaf node to the leaf node cache.
+ * @c: UBIFS file-system description object
+ * @zbr: zbranch of leaf node
+ * @node: leaf node
+ *
+ * Leaf nodes are non-index nodes directory entry nodes or data nodes. The
+ * purpose of the leaf node cache is to save re-reading the same leaf node over
+ * and over again. Most things are cached by VFS, however the file system must
+ * cache directory entries for readdir and for resolving hash collisions. The
+ * present implementation of the leaf node cache is extremely simple, and
+ * allows for error returns that are not used but that may be needed if a more
+ * complex implementation is created.
+ *
+ * Note, this function does not add the @node object to LNC directly, but
+ * allocates a copy of the object and adds the copy to LNC. The reason for this
+ * is that @node has been allocated outside of the TNC subsystem and will be
+ * used with @c->tnc_mutex unlock upon return from the TNC subsystem. But LNC
+ * may be changed at any time, e.g. freed by the shrinker.
+ */
+static int lnc_add(struct ubifs_info *c, struct ubifs_zbranch *zbr,
+ const void *node)
+{
+ int err;
+ void *lnc_node;
+ const struct ubifs_dent_node *dent = node;
+
+ ubifs_assert(!zbr->leaf);
+ ubifs_assert(zbr->len != 0);
+ ubifs_assert(is_hash_key(c, &zbr->key));
+
+ err = ubifs_validate_entry(c, dent);
+ if (err) {
+ dbg_dump_stack();
+ dbg_dump_node(c, dent);
+ return err;
+ }
+
+ lnc_node = kmalloc(zbr->len, GFP_NOFS);
+ if (!lnc_node)
+ /* We don't have to have the cache, so no error */
+ return 0;
+
+ memcpy(lnc_node, node, zbr->len);
+ zbr->leaf = lnc_node;
+ return 0;
+}
+
+ /**
+ * lnc_add_directly - add a leaf node to the leaf-node-cache.
+ * @c: UBIFS file-system description object
+ * @zbr: zbranch of leaf node
+ * @node: leaf node
+ *
+ * This function is similar to 'lnc_add()', but it does not create a copy of
+ * @node but inserts @node to TNC directly.
+ */
+static int lnc_add_directly(struct ubifs_info *c, struct ubifs_zbranch *zbr,
+ void *node)
+{
+ int err;
+
+ ubifs_assert(!zbr->leaf);
+ ubifs_assert(zbr->len != 0);
+
+ err = ubifs_validate_entry(c, node);
+ if (err) {
+ dbg_dump_stack();
+ dbg_dump_node(c, node);
+ return err;
+ }
+
+ zbr->leaf = node;
+ return 0;
+}
+
+/**
+ * lnc_free - remove a leaf node from the leaf node cache.
+ * @zbr: zbranch of leaf node
+ * @node: leaf node
+ */
+static void lnc_free(struct ubifs_zbranch *zbr)
+{
+ if (!zbr->leaf)
+ return;
+ kfree(zbr->leaf);
+ zbr->leaf = NULL;
+}
+
+/**
+ * tnc_read_node_nm - read a "hashed" leaf node.
+ * @c: UBIFS file-system description object
+ * @zbr: key and position of the node
+ * @node: node is returned here
+ *
+ * This function reads a "hashed" node defined by @zbr from the leaf node cache
+ * (in it is there) or from the hash media, in which case the node is also
+ * added to LNC. Returns zero in case of success or a negative negative error
+ * code in case of failure.
+ */
+static int tnc_read_node_nm(struct ubifs_info *c, struct ubifs_zbranch *zbr,
+ void *node)
+{
+ int err;
+
+ ubifs_assert(is_hash_key(c, &zbr->key));
+
+ if (zbr->leaf) {
+ /* Read from the leaf node cache */
+ ubifs_assert(zbr->len != 0);
+ memcpy(node, zbr->leaf, zbr->len);
+ return 0;
+ }
+
+ err = ubifs_tnc_read_node(c, zbr, node);
+ if (err)
+ return err;
+
+ /* Add the node to the leaf node cache */
+ err = lnc_add(c, zbr, node);
+ return err;
+}
+
+/**
+ * try_read_node - read a node if it is a node.
+ * @c: UBIFS file-system description object
+ * @buf: buffer to read to
+ * @type: node type
+ * @len: node length (not aligned)
+ * @lnum: LEB number of node to read
+ * @offs: offset of node to read
+ *
+ * This function tries to read a node of known type and length, checks it and
+ * stores it in @buf. This function returns %1 if a node is present and %0 if
+ * a node is not present. A negative error code is returned for I/O errors.
+ * This function performs that same function as ubifs_read_node except that
+ * it does not require that there is actually a node present and instead
+ * the return code indicates if a node was read.
+ */
+static int try_read_node(const struct ubifs_info *c, void *buf, int type,
+ int len, int lnum, int offs)
+{
+ int err, node_len;
+ struct ubifs_ch *ch = buf;
+ uint32_t crc, node_crc;
+
+ dbg_io("LEB %d:%d, %s, length %d", lnum, offs, dbg_ntype(type), len);
+
+ err = ubi_read(c->ubi, lnum, buf, offs, len);
+ if (err) {
+ ubifs_err("cannot read node type %d from LEB %d:%d, error %d",
+ type, lnum, offs, err);
+ return err;
+ }
+
+ if (le32_to_cpu(ch->magic) != UBIFS_NODE_MAGIC)
+ return 0;
+
+ if (ch->node_type != type)
+ return 0;
+
+ node_len = le32_to_cpu(ch->len);
+ if (node_len != len)
+ return 0;
+
+ crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8);
+ node_crc = le32_to_cpu(ch->crc);
+ if (crc != node_crc)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * fallible_read_node - try to read a leaf node.
+ * @c: UBIFS file-system description object
+ * @key: key of node to read
+ * @zbr: position of node
+ * @node: node returned
+ *
+ * This function tries to read a node and returns %1 if the node is read, %0
+ * if the node is not present, and a negative error code in the case of error.
+ */
+static int fallible_read_node(struct ubifs_info *c, const union ubifs_key *key,
+ struct ubifs_zbranch *zbr, void *node)
+{
+ int ret;
+
+ dbg_tnc("LEB %d:%d, key %s", zbr->lnum, zbr->offs, DBGKEY(key));
+
+ ret = try_read_node(c, node, key_type(c, key), zbr->len, zbr->lnum,
+ zbr->offs);
+ if (ret == 1) {
+ union ubifs_key node_key;
+ struct ubifs_dent_node *dent = node;
+
+ /* All nodes have key in the same place */
+ key_read(c, &dent->key, &node_key);
+ if (keys_cmp(c, key, &node_key) != 0)
+ ret = 0;
+ }
+ if (ret == 0)
+ dbg_mnt("dangling branch LEB %d:%d len %d, key %s",
+ zbr->lnum, zbr->offs, zbr->len, DBGKEY(key));
+ return ret;
+}
+
+/**
+ * matches_name - determine if a directory or extended attribute entry matches
+ * a given name.
+ * @c: UBIFS file-system description object
+ * @zbr: zbranch of dent
+ * @nm: name to match
+ *
+ * This function checks if xentry/direntry referred by zbranch @zbr matches name
+ * @nm. Returns %NAME_MATCHES if it does, %NAME_LESS if the name referred by
+ * @zbr is less than @nm, and %NAME_GREATER if it is greater than @nm. In case
+ * of failure, a negative error code is returned.
+ */
+static int matches_name(struct ubifs_info *c, struct ubifs_zbranch *zbr,
+ const struct qstr *nm)
+{
+ struct ubifs_dent_node *dent;
+ int nlen, err;
+
+ /* If possible, match against the dent in the leaf node cache */
+ if (!zbr->leaf) {
+ dent = kmalloc(zbr->len, GFP_NOFS);
+ if (!dent)
+ return -ENOMEM;
+
+ err = ubifs_tnc_read_node(c, zbr, dent);
+ if (err)
+ goto out_free;
+
+ /* Add the node to the leaf node cache */
+ err = lnc_add_directly(c, zbr, dent);
+ if (err)
+ goto out_free;
+ } else
+ dent = zbr->leaf;
+
+ nlen = le16_to_cpu(dent->nlen);
+ err = memcmp(dent->name, nm->name, min_t(int, nlen, nm->len));
+ if (err == 0) {
+ if (nlen == nm->len)
+ return NAME_MATCHES;
+ else if (nlen < nm->len)
+ return NAME_LESS;
+ else
+ return NAME_GREATER;
+ } else if (err < 0)
+ return NAME_LESS;
+ else
+ return NAME_GREATER;
+
+out_free:
+ kfree(dent);
+ return err;
+}
+
+/**
+ * get_znode - get a TNC znode that may not be loaded yet.
+ * @c: UBIFS file-system description object
+ * @znode: parent znode
+ * @n: znode branch slot number
+ *
+ * This function returns the znode or a negative error code.
+ */
+static struct ubifs_znode *get_znode(struct ubifs_info *c,
+ struct ubifs_znode *znode, int n)
+{
+ struct ubifs_zbranch *zbr;
+
+ zbr = &znode->zbranch[n];
+ if (zbr->znode)
+ znode = zbr->znode;
+ else
+ znode = ubifs_load_znode(c, zbr, znode, n);
+ return znode;
+}
+
+/**
+ * tnc_next - find next TNC entry.
+ * @c: UBIFS file-system description object
+ * @zn: znode is passed and returned here
+ * @n: znode branch slot number is passed and returned here
+ *
+ * This function returns %0 if the next TNC entry is found, %-ENOENT if there is
+ * no next entry, or a negative error code otherwise.
+ */
+static int tnc_next(struct ubifs_info *c, struct ubifs_znode **zn, int *n)
+{
+ struct ubifs_znode *znode = *zn;
+ int nn = *n;
+
+ nn += 1;
+ if (nn < znode->child_cnt) {
+ *n = nn;
+ return 0;
+ }
+ while (1) {
+ struct ubifs_znode *zp;
+
+ zp = znode->parent;
+ if (!zp)
+ return -ENOENT;
+ nn = znode->iip + 1;
+ znode = zp;
+ if (nn < znode->child_cnt) {
+ znode = get_znode(c, znode, nn);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ while (znode->level != 0) {
+ znode = get_znode(c, znode, 0);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ }
+ nn = 0;
+ break;
+ }
+ }
+ *zn = znode;
+ *n = nn;
+ return 0;
+}
+
+/**
+ * tnc_prev - find previous TNC entry.
+ * @c: UBIFS file-system description object
+ * @zn: znode is returned here
+ * @n: znode branch slot number is passed and returned here
+ *
+ * This function returns %0 if the previous TNC entry is found, %-ENOENT if
+ * there is no next entry, or a negative error code otherwise.
+ */
+static int tnc_prev(struct ubifs_info *c, struct ubifs_znode **zn, int *n)
+{
+ struct ubifs_znode *znode = *zn;
+ int nn = *n;
+
+ if (nn > 0) {
+ *n = nn - 1;
+ return 0;
+ }
+ while (1) {
+ struct ubifs_znode *zp;
+
+ zp = znode->parent;
+ if (!zp)
+ return -ENOENT;
+ nn = znode->iip - 1;
+ znode = zp;
+ if (nn >= 0) {
+ znode = get_znode(c, znode, nn);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ while (znode->level != 0) {
+ nn = znode->child_cnt - 1;
+ znode = get_znode(c, znode, nn);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ }
+ nn = znode->child_cnt - 1;
+ break;
+ }
+ }
+ *zn = znode;
+ *n = nn;
+ return 0;
+}
+
+/**
+ * resolve_collision - resolve a collision.
+ * @c: UBIFS file-system description object
+ * @key: key of a directory or extended attribute entry
+ * @zn: znode is returned here
+ * @n: zbranch number is passed and returned here
+ * @nm: name of the entry
+ *
+ * This function is called for "hashed" keys to make sure that the found key
+ * really corresponds to the looked up node (directory or extended attribute
+ * entry). It returns %1 and sets @zn and @n if the collision is resolved.
+ * %0 is returned if @nm is not found and @zn and @n are set to the previous
+ * entry, i.e. to the entry after which @nm could follow if it were in TNC.
+ * This means that @n may be set to %-1 if the leftmost key in @zn is the
+ * previous one. A negative error code is returned on failures.
+ */
+static int resolve_collision(struct ubifs_info *c, const union ubifs_key *key,
+ struct ubifs_znode **zn, int *n,
+ const struct qstr *nm)
+{
+ int err;
+
+ err = matches_name(c, &(*zn)->zbranch[*n], nm);
+ if (unlikely(err < 0))
+ return err;
+ if (err == NAME_MATCHES)
+ return 1;
+
+ if (err == NAME_GREATER) {
+ /* Look left */
+ while (1) {
+ err = tnc_prev(c, zn, n);
+ if (err == -ENOENT) {
+ ubifs_assert(*n == 0);
+ *n = -1;
+ return 0;
+ }
+ if (err < 0)
+ return err;
+ if (keys_cmp(c, &(*zn)->zbranch[*n].key, key)) {
+ /*
+ * We have found the branch after which we would
+ * like to insert, but inserting in this znode
+ * may still be wrong. Consider the following 3
+ * znodes, in the case where we are resolving a
+ * collision with Key2.
+ *
+ * znode zp
+ * ----------------------
+ * level 1 | Key0 | Key1 |
+ * -----------------------
+ * | |
+ * znode za | | znode zb
+ * ------------ ------------
+ * level 0 | Key0 | | Key2 |
+ * ------------ ------------
+ *
+ * The lookup finds Key2 in znode zb. Lets say
+ * there is no match and the name is greater so
+ * we look left. When we find Key0, we end up
+ * here. If we return now, we will insert into
+ * znode za at slot n = 1. But that is invalid
+ * according to the parent's keys. Key2 must
+ * be inserted into znode zb.
+ *
+ * Note, this problem is not relevant for the
+ * case when we go right, because
+ * 'tnc_insert()' would correct the parent key.
+ */
+ if (*n == (*zn)->child_cnt - 1) {
+ err = tnc_next(c, zn, n);
+ if (err) {
+ /* Should be impossible */
+ ubifs_assert(0);
+ if (err == -ENOENT)
+ err = -EINVAL;
+ return err;
+ }
+ ubifs_assert(*n == 0);
+ *n = -1;
+ }
+ return 0;
+ }
+ err = matches_name(c, &(*zn)->zbranch[*n], nm);
+ if (err < 0)
+ return err;
+ if (err == NAME_LESS)
+ return 0;
+ if (err == NAME_MATCHES)
+ return 1;
+ ubifs_assert(err == NAME_GREATER);
+ }
+ } else {
+ int nn = *n;
+ struct ubifs_znode *znode = *zn;
+
+ /* Look right */
+ while (1) {
+ err = tnc_next(c, &znode, &nn);
+ if (err == -ENOENT)
+ return 0;
+ if (err < 0)
+ return err;
+ if (keys_cmp(c, &znode->zbranch[nn].key, key))
+ return 0;
+ err = matches_name(c, &znode->zbranch[nn], nm);
+ if (err < 0)
+ return err;
+ if (err == NAME_GREATER)
+ return 0;
+ *zn = znode;
+ *n = nn;
+ if (err == NAME_MATCHES)
+ return 1;
+ ubifs_assert(err == NAME_LESS);
+ }
+ }
+}
+
+/**
+ * fallible_matches_name - determine if a dent matches a given name.
+ * @c: UBIFS file-system description object
+ * @zbr: zbranch of dent
+ * @nm: name to match
+ *
+ * This is a "fallible" version of 'matches_name()' function which does not
+ * panic if the direntry/xentry referred by @zbr does not exist on the media.
+ *
+ * This function checks if xentry/direntry referred by zbranch @zbr matches name
+ * @nm. Returns %NAME_MATCHES it does, %NAME_LESS if the name referred by @zbr
+ * is less than @nm, %NAME_GREATER if it is greater than @nm, and @NOT_ON_MEDIA
+ * if xentry/direntry referred by @zbr does not exist on the media. A negative
+ * error code is returned in case of failure.
+ */
+static int fallible_matches_name(struct ubifs_info *c,
+ struct ubifs_zbranch *zbr,
+ const struct qstr *nm)
+{
+ struct ubifs_dent_node *dent;
+ int nlen, err;
+
+ /* If possible, match against the dent in the leaf node cache */
+ if (!zbr->leaf) {
+ dent = kmalloc(zbr->len, GFP_NOFS);
+ if (!dent)
+ return -ENOMEM;
+
+ err = fallible_read_node(c, &zbr->key, zbr, dent);
+ if (err < 0)
+ goto out_free;
+ if (err == 0) {
+ /* The node was not present */
+ err = NOT_ON_MEDIA;
+ goto out_free;
+ }
+ ubifs_assert(err == 1);
+
+ err = lnc_add_directly(c, zbr, dent);
+ if (err)
+ goto out_free;
+ } else
+ dent = zbr->leaf;
+
+ nlen = le16_to_cpu(dent->nlen);
+ err = memcmp(dent->name, nm->name, min_t(int, nlen, nm->len));
+ if (err == 0) {
+ if (nlen == nm->len)
+ return NAME_MATCHES;
+ else if (nlen < nm->len)
+ return NAME_LESS;
+ else
+ return NAME_GREATER;
+ } else if (err < 0)
+ return NAME_LESS;
+ else
+ return NAME_GREATER;
+
+out_free:
+ kfree(dent);
+ return err;
+}
+
+/**
+ * fallible_resolve_collision - resolve a collision even if nodes are missing.
+ * @c: UBIFS file-system description object
+ * @key: key
+ * @zn: znode is returned here
+ * @n: branch number is passed and returned here
+ * @nm: name of directory entry
+ * @adding: indicates caller is adding a key to the TNC
+ *
+ * This is a "fallible" version of the 'resolve_collision()' function which
+ * does not panic if one of the nodes referred to by TNC does not exist on the
+ * media. This may happen when replaying the journal if a deleted node was
+ * Garbage-collected and the commit was not done. A branch that refers to a node
+ * that is not present is called a dangling branch. The following are the return
+ * codes for this function:
+ * o if @nm was found, %1 is returned and @zn and @n are set to the found
+ * branch;
+ * o if we are @adding and @nm was not found, %0 is returned;
+ * o if we are not @adding and @nm was not found, but a dangling branch was
+ * found, then %1 is returned and @zn and @n are set to the dangling branch;
+ * o a negative error code is returned in case of failure.
+ */
+static int fallible_resolve_collision(struct ubifs_info *c,
+ const union ubifs_key *key,
+ struct ubifs_znode **zn, int *n,
+ const struct qstr *nm, int adding)
+{
+ struct ubifs_znode *o_znode = NULL, *znode = *zn;
+ int uninitialized_var(o_n), err, cmp, unsure = 0, nn = *n;
+
+ cmp = fallible_matches_name(c, &znode->zbranch[nn], nm);
+ if (unlikely(cmp < 0))
+ return cmp;
+ if (cmp == NAME_MATCHES)
+ return 1;
+ if (cmp == NOT_ON_MEDIA) {
+ o_znode = znode;
+ o_n = nn;
+ /*
+ * We are unlucky and hit a dangling branch straight away.
+ * Now we do not really know where to go to find the needed
+ * branch - to the left or to the right. Well, let's try left.
+ */
+ unsure = 1;
+ } else if (!adding)
+ unsure = 1; /* Remove a dangling branch wherever it is */
+
+ if (cmp == NAME_GREATER || unsure) {
+ /* Look left */
+ while (1) {
+ err = tnc_prev(c, zn, n);
+ if (err == -ENOENT) {
+ ubifs_assert(*n == 0);
+ *n = -1;
+ break;
+ }
+ if (err < 0)
+ return err;
+ if (keys_cmp(c, &(*zn)->zbranch[*n].key, key)) {
+ /* See comments in 'resolve_collision()' */
+ if (*n == (*zn)->child_cnt - 1) {
+ err = tnc_next(c, zn, n);
+ if (err) {
+ /* Should be impossible */
+ ubifs_assert(0);
+ if (err == -ENOENT)
+ err = -EINVAL;
+ return err;
+ }
+ ubifs_assert(*n == 0);
+ *n = -1;
+ }
+ break;
+ }
+ err = fallible_matches_name(c, &(*zn)->zbranch[*n], nm);
+ if (err < 0)
+ return err;
+ if (err == NAME_MATCHES)
+ return 1;
+ if (err == NOT_ON_MEDIA) {
+ o_znode = *zn;
+ o_n = *n;
+ continue;
+ }
+ if (!adding)
+ continue;
+ if (err == NAME_LESS)
+ break;
+ else
+ unsure = 0;
+ }
+ }
+
+ if (cmp == NAME_LESS || unsure) {
+ /* Look right */
+ *zn = znode;
+ *n = nn;
+ while (1) {
+ err = tnc_next(c, &znode, &nn);
+ if (err == -ENOENT)
+ break;
+ if (err < 0)
+ return err;
+ if (keys_cmp(c, &znode->zbranch[nn].key, key))
+ break;
+ err = fallible_matches_name(c, &znode->zbranch[nn], nm);
+ if (err < 0)
+ return err;
+ if (err == NAME_GREATER)
+ break;
+ *zn = znode;
+ *n = nn;
+ if (err == NAME_MATCHES)
+ return 1;
+ if (err == NOT_ON_MEDIA) {
+ o_znode = znode;
+ o_n = nn;
+ }
+ }
+ }
+
+ /* Never match a dangling branch when adding */
+ if (adding || !o_znode)
+ return 0;
+
+ dbg_mnt("dangling match LEB %d:%d len %d %s",
+ o_znode->zbranch[o_n].lnum, o_znode->zbranch[o_n].offs,
+ o_znode->zbranch[o_n].len, DBGKEY(key));
+ *zn = o_znode;
+ *n = o_n;
+ return 1;
+}
+
+/**
+ * matches_position - determine if a zbranch matches a given position.
+ * @zbr: zbranch of dent
+ * @lnum: LEB number of dent to match
+ * @offs: offset of dent to match
+ *
+ * This function returns %1 if @lnum:@offs matches, and %0 otherwise.
+ */
+static int matches_position(struct ubifs_zbranch *zbr, int lnum, int offs)
+{
+ if (zbr->lnum == lnum && zbr->offs == offs)
+ return 1;
+ else
+ return 0;
+}
+
+/**
+ * resolve_collision_directly - resolve a collision directly.
+ * @c: UBIFS file-system description object
+ * @key: key of directory entry
+ * @zn: znode is passed and returned here
+ * @n: zbranch number is passed and returned here
+ * @lnum: LEB number of dent node to match
+ * @offs: offset of dent node to match
+ *
+ * This function is used for "hashed" keys to make sure the found directory or
+ * extended attribute entry node is what was looked for. It is used when the
+ * flash address of the right node is known (@lnum:@offs) which makes it much
+ * easier to resolve collisions (no need to read entries and match full
+ * names). This function returns %1 and sets @zn and @n if the collision is
+ * resolved, %0 if @lnum:@offs is not found and @zn and @n are set to the
+ * previous directory entry. Otherwise a negative error code is returned.
+ */
+static int resolve_collision_directly(struct ubifs_info *c,
+ const union ubifs_key *key,
+ struct ubifs_znode **zn, int *n,
+ int lnum, int offs)
+{
+ struct ubifs_znode *znode;
+ int nn, err;
+
+ znode = *zn;
+ nn = *n;
+ if (matches_position(&znode->zbranch[nn], lnum, offs))
+ return 1;
+
+ /* Look left */
+ while (1) {
+ err = tnc_prev(c, &znode, &nn);
+ if (err == -ENOENT)
+ break;
+ if (err < 0)
+ return err;
+ if (keys_cmp(c, &znode->zbranch[nn].key, key))
+ break;
+ if (matches_position(&znode->zbranch[nn], lnum, offs)) {
+ *zn = znode;
+ *n = nn;
+ return 1;
+ }
+ }
+
+ /* Look right */
+ znode = *zn;
+ nn = *n;
+ while (1) {
+ err = tnc_next(c, &znode, &nn);
+ if (err == -ENOENT)
+ return 0;
+ if (err < 0)
+ return err;
+ if (keys_cmp(c, &znode->zbranch[nn].key, key))
+ return 0;
+ *zn = znode;
+ *n = nn;
+ if (matches_position(&znode->zbranch[nn], lnum, offs))
+ return 1;
+ }
+}
+
+/**
+ * dirty_cow_bottom_up - dirty a znode and its ancestors.
+ * @c: UBIFS file-system description object
+ * @znode: znode to dirty
+ *
+ * If we do not have a unique key that resides in a znode, then we cannot
+ * dirty that znode from the top down (i.e. by using lookup_level0_dirty)
+ * This function records the path back to the last dirty ancestor, and then
+ * dirties the znodes on that path.
+ */
+static struct ubifs_znode *dirty_cow_bottom_up(struct ubifs_info *c,
+ struct ubifs_znode *znode)
+{
+ struct ubifs_znode *zp;
+ int *path = c->bottom_up_buf, p = 0;
+
+ ubifs_assert(c->zroot.znode);
+ ubifs_assert(znode);
+ if (c->zroot.znode->level > BOTTOM_UP_HEIGHT) {
+ kfree(c->bottom_up_buf);
+ c->bottom_up_buf = kmalloc(c->zroot.znode->level * sizeof(int),
+ GFP_NOFS);
+ if (!c->bottom_up_buf)
+ return ERR_PTR(-ENOMEM);
+ path = c->bottom_up_buf;
+ }
+ if (c->zroot.znode->level) {
+ /* Go up until parent is dirty */
+ while (1) {
+ int n;
+
+ zp = znode->parent;
+ if (!zp)
+ break;
+ n = znode->iip;
+ ubifs_assert(p < c->zroot.znode->level);
+ path[p++] = n;
+ if (!zp->cnext && ubifs_zn_dirty(znode))
+ break;
+ znode = zp;
+ }
+ }
+
+ /* Come back down, dirtying as we go */
+ while (1) {
+ struct ubifs_zbranch *zbr;
+
+ zp = znode->parent;
+ if (zp) {
+ ubifs_assert(path[p - 1] >= 0);
+ ubifs_assert(path[p - 1] < zp->child_cnt);
+ zbr = &zp->zbranch[path[--p]];
+ znode = dirty_cow_znode(c, zbr);
+ } else {
+ ubifs_assert(znode == c->zroot.znode);
+ znode = dirty_cow_znode(c, &c->zroot);
+ }
+ if (unlikely(IS_ERR(znode)) || !p)
+ break;
+ ubifs_assert(path[p - 1] >= 0);
+ ubifs_assert(path[p - 1] < znode->child_cnt);
+ znode = znode->zbranch[path[p - 1]].znode;
+ }
+
+ return znode;
+}
+
+/**
+ * ubifs_lookup_level0 - search for zero-level znode.
+ * @c: UBIFS file-system description object
+ * @key: key to lookup
+ * @zn: znode is returned here
+ * @n: znode branch slot number is returned here
+ *
+ * This function looks up the TNC tree and search for zero-level znode which
+ * refers key @key. The found zero-level znode is returned in @zn. There are 3
+ * cases:
+ * o exact match, i.e. the found zero-level znode contains key @key, then %1
+ * is returned and slot number of the matched branch is stored in @n;
+ * o not exact match, which means that zero-level znode does not contain
+ * @key, then %0 is returned and slot number of the closed branch is stored
+ * in @n;
+ * o @key is so small that it is even less than the lowest key of the
+ * leftmost zero-level node, then %0 is returned and %0 is stored in @n.
+ *
+ * Note, when the TNC tree is traversed, some znodes may be absent, then this
+ * function reads corresponding indexing nodes and inserts them to TNC. In
+ * case of failure, a negative error code is returned.
+ */
+int ubifs_lookup_level0(struct ubifs_info *c, const union ubifs_key *key,
+ struct ubifs_znode **zn, int *n)
+{
+ int err, exact;
+ struct ubifs_znode *znode;
+ unsigned long time = get_seconds();
+
+ dbg_tnc("search key %s", DBGKEY(key));
+
+ znode = c->zroot.znode;
+ if (unlikely(!znode)) {
+ znode = ubifs_load_znode(c, &c->zroot, NULL, 0);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ }
+
+ znode->time = time;
+
+ while (1) {
+ struct ubifs_zbranch *zbr;
+
+ exact = ubifs_search_zbranch(c, znode, key, n);
+
+ if (znode->level == 0)
+ break;
+
+ if (*n < 0)
+ *n = 0;
+ zbr = &znode->zbranch[*n];
+
+ if (zbr->znode) {
+ znode->time = time;
+ znode = zbr->znode;
+ continue;
+ }
+
+ /* znode is not in TNC cache, load it from the media */
+ znode = ubifs_load_znode(c, zbr, znode, *n);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ }
+
+ *zn = znode;
+ if (exact || !is_hash_key(c, key) || *n != -1) {
+ dbg_tnc("found %d, lvl %d, n %d", exact, znode->level, *n);
+ return exact;
+ }
+
+ /*
+ * Here is a tricky place. We have not found the key and this is a
+ * "hashed" key, which may collide. The rest of the code deals with
+ * situations like this:
+ *
+ * | 3 | 5 |
+ * / \
+ * | 3 | 5 | | 6 | 7 | (x)
+ *
+ * Or more a complex example:
+ *
+ * | 1 | 5 |
+ * / \
+ * | 1 | 3 | | 5 | 8 |
+ * \ /
+ * | 5 | 5 | | 6 | 7 | (x)
+ *
+ * In the examples, if we are looking for key "5", we may reach nodes
+ * marked with "(x)". In this case what we have do is to look at the
+ * left and see if there is "5" key there. If there is, we have to
+ * return it.
+ *
+ * Note, this whole situation is possible because we allow to have
+ * elements which are equivalent to the next key in the parent in the
+ * children of current znode. For example, this happens if we split a
+ * znode like this: | 3 | 5 | 5 | 6 | 7 |, which results in something
+ * like this:
+ * | 3 | 5 |
+ * / \
+ * | 3 | 5 | | 5 | 6 | 7 |
+ * ^
+ * And this becomes what is at the first "picture" after key "5" marked
+ * with "^" is removed. What could be done is we could prohibit
+ * splitting in the middle of the colliding sequence. Also, when
+ * removing the leftmost key, we would have to correct the key of the
+ * parent node, which would introduce additional complications. Namely,
+ * if we changed the the leftmost key of the parent znode, the garbage
+ * collector would be unable to find it (GC is doing this when GC'ing
+ * indexing LEBs). Although we already have an additional RB-tree where
+ * we save such changed znodes (see 'ins_clr_old_idx_znode()') until
+ * after the commit. But anyway, this does not look easy to implement
+ * so we did not try this.
+ */
+ err = tnc_prev(c, &znode, n);
+ if (err == -ENOENT) {
+ dbg_tnc("found 0, lvl %d, n -1", znode->level);
+ *n = -1;
+ return 0;
+ }
+ if (unlikely(err < 0))
+ return err;
+ if (keys_cmp(c, key, &znode->zbranch[*n].key)) {
+ dbg_tnc("found 0, lvl %d, n -1", znode->level);
+ *n = -1;
+ return 0;
+ }
+
+ dbg_tnc("found 1, lvl %d, n %d", znode->level, *n);
+ *zn = znode;
+ return 1;
+}
+
+/**
+ * lookup_level0_dirty - search for zero-level znode dirtying.
+ * @c: UBIFS file-system description object
+ * @key: key to lookup
+ * @zn: znode is returned here
+ * @n: znode branch slot number is returned here
+ *
+ * This function looks up the TNC tree and search for zero-level znode which
+ * refers key @key. The found zero-level znode is returned in @zn. There are 3
+ * cases:
+ * o exact match, i.e. the found zero-level znode contains key @key, then %1
+ * is returned and slot number of the matched branch is stored in @n;
+ * o not exact match, which means that zero-level znode does not contain @key
+ * then %0 is returned and slot number of the closed branch is stored in
+ * @n;
+ * o @key is so small that it is even less than the lowest key of the
+ * leftmost zero-level node, then %0 is returned and %-1 is stored in @n.
+ *
+ * Additionally all znodes in the path from the root to the located zero-level
+ * znode are marked as dirty.
+ *
+ * Note, when the TNC tree is traversed, some znodes may be absent, then this
+ * function reads corresponding indexing nodes and inserts them to TNC. In
+ * case of failure, a negative error code is returned.
+ */
+static int lookup_level0_dirty(struct ubifs_info *c, const union ubifs_key *key,
+ struct ubifs_znode **zn, int *n)
+{
+ int err, exact;
+ struct ubifs_znode *znode;
+ unsigned long time = get_seconds();
+
+ dbg_tnc("search and dirty key %s", DBGKEY(key));
+
+ znode = c->zroot.znode;
+ if (unlikely(!znode)) {
+ znode = ubifs_load_znode(c, &c->zroot, NULL, 0);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ }
+
+ znode = dirty_cow_znode(c, &c->zroot);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+
+ znode->time = time;
+
+ while (1) {
+ struct ubifs_zbranch *zbr;
+
+ exact = ubifs_search_zbranch(c, znode, key, n);
+
+ if (znode->level == 0)
+ break;
+
+ if (*n < 0)
+ *n = 0;
+ zbr = &znode->zbranch[*n];
+
+ if (zbr->znode) {
+ znode->time = time;
+ znode = dirty_cow_znode(c, zbr);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ continue;
+ }
+
+ /* znode is not in TNC cache, load it from the media */
+ znode = ubifs_load_znode(c, zbr, znode, *n);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ znode = dirty_cow_znode(c, zbr);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ }
+
+ *zn = znode;
+ if (exact || !is_hash_key(c, key) || *n != -1) {
+ dbg_tnc("found %d, lvl %d, n %d", exact, znode->level, *n);
+ return exact;
+ }
+
+ /*
+ * See huge comment at 'lookup_level0_dirty()' what is the rest of the
+ * code.
+ */
+ err = tnc_prev(c, &znode, n);
+ if (err == -ENOENT) {
+ *n = -1;
+ dbg_tnc("found 0, lvl %d, n -1", znode->level);
+ return 0;
+ }
+ if (unlikely(err < 0))
+ return err;
+ if (keys_cmp(c, key, &znode->zbranch[*n].key)) {
+ *n = -1;
+ dbg_tnc("found 0, lvl %d, n -1", znode->level);
+ return 0;
+ }
+
+ if (znode->cnext || !ubifs_zn_dirty(znode)) {
+ znode = dirty_cow_bottom_up(c, znode);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ }
+
+ dbg_tnc("found 1, lvl %d, n %d", znode->level, *n);
+ *zn = znode;
+ return 1;
+}
+
+/**
+ * ubifs_tnc_lookup - look up a file-system node.
+ * @c: UBIFS file-system description object
+ * @key: node key to lookup
+ * @node: the node is returned here
+ *
+ * This function look up and reads node with key @key. The caller has to make
+ * sure the @node buffer is large enough to fit the node. Returns zero in case
+ * of success, %-ENOENT if the node was not found, and a negative error code in
+ * case of failure.
+ */
+int ubifs_tnc_lookup(struct ubifs_info *c, const union ubifs_key *key,
+ void *node)
+{
+ int found, n, err;
+ struct ubifs_znode *znode;
+ struct ubifs_zbranch zbr, *zt;
+
+ mutex_lock(&c->tnc_mutex);
+ found = ubifs_lookup_level0(c, key, &znode, &n);
+ if (!found) {
+ err = -ENOENT;
+ goto out;
+ } else if (found < 0) {
+ err = found;
+ goto out;
+ }
+ zt = &znode->zbranch[n];
+ if (is_hash_key(c, key)) {
+ /*
+ * In this case the leaf node cache gets used, so we pass the
+ * address of the zbranch and keep the mutex locked
+ */
+ err = tnc_read_node_nm(c, zt, node);
+ goto out;
+ }
+ zbr = znode->zbranch[n];
+ mutex_unlock(&c->tnc_mutex);
+
+ err = ubifs_tnc_read_node(c, &zbr, node);
+ return err;
+
+out:
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * ubifs_tnc_locate - look up a file-system node and return it and its location.
+ * @c: UBIFS file-system description object
+ * @key: node key to lookup
+ * @node: the node is returned here
+ * @lnum: LEB number is returned here
+ * @offs: offset is returned here
+ *
+ * This function is the same as 'ubifs_tnc_lookup()' but it returns the node
+ * location also. See 'ubifs_tnc_lookup()'.
+ */
+int ubifs_tnc_locate(struct ubifs_info *c, const union ubifs_key *key,
+ void *node, int *lnum, int *offs)
+{
+ int found, n, err;
+ struct ubifs_znode *znode;
+ struct ubifs_zbranch zbr, *zt;
+
+ mutex_lock(&c->tnc_mutex);
+ found = ubifs_lookup_level0(c, key, &znode, &n);
+ if (!found) {
+ err = -ENOENT;
+ goto out;
+ } else if (found < 0) {
+ err = found;
+ goto out;
+ }
+ zt = &znode->zbranch[n];
+ if (is_hash_key(c, key)) {
+ /*
+ * In this case the leaf node cache gets used, so we pass the
+ * address of the zbranch and keep the mutex locked
+ */
+ *lnum = zt->lnum;
+ *offs = zt->offs;
+ err = tnc_read_node_nm(c, zt, node);
+ goto out;
+ }
+ zbr = znode->zbranch[n];
+ mutex_unlock(&c->tnc_mutex);
+
+ *lnum = zbr.lnum;
+ *offs = zbr.offs;
+
+ err = ubifs_tnc_read_node(c, &zbr, node);
+ return err;
+
+out:
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * do_lookup_nm- look up a "hashed" node.
+ * directory entry file-system node.
+ * @c: UBIFS file-system description object
+ * @key: node key to lookup
+ * @node: the node is returned here
+ * @nm: node name
+ *
+ * This function look up and reads a node which contains name hash in the key.
+ * Since the hash may have collisions, there may be many nodes with the same
+ * key, so we have to sequentially look to all of them until the needed one is
+ * found. This function returns zero in case of success, %-ENOENT if the node
+ * was not found, and a negative error code in case of failure.
+ */
+static int do_lookup_nm(struct ubifs_info *c, const union ubifs_key *key,
+ void *node, const struct qstr *nm)
+{
+ int found, n, err;
+ struct ubifs_znode *znode;
+ struct ubifs_zbranch zbr;
+
+ dbg_tnc("name '%.*s' key %s", nm->len, nm->name, DBGKEY(key));
+ mutex_lock(&c->tnc_mutex);
+ found = ubifs_lookup_level0(c, key, &znode, &n);
+ if (!found) {
+ err = -ENOENT;
+ goto out_unlock;
+ } else if (found < 0) {
+ err = found;
+ goto out_unlock;
+ }
+
+ ubifs_assert(n >= 0);
+
+ err = resolve_collision(c, key, &znode, &n, nm);
+ dbg_tnc("rc returned %d, znode %p, n %d", err, znode, n);
+ if (unlikely(err < 0))
+ goto out_unlock;
+ if (err == 0) {
+ err = -ENOENT;
+ goto out_unlock;
+ }
+
+ zbr = znode->zbranch[n];
+ mutex_unlock(&c->tnc_mutex);
+
+ err = tnc_read_node_nm(c, &zbr, node);
+ return err;
+
+out_unlock:
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * ubifs_tnc_lookup_nm- look up a "hashed" node.
+ * directory entry file-system node.
+ * @c: UBIFS file-system description object
+ * @key: node key to lookup
+ * @node: the node is returned here
+ * @nm: node name
+ *
+ * This function look up and reads a node which contains name hash in the key.
+ * Since the hash may have collisions, there may be many nodes with the same
+ * key, so we have to sequentially look to all of them until the needed one is
+ * found. This function returns zero in case of success, %-ENOENT if the node
+ * was not found, and a negative error code in case of failure.
+ */
+int ubifs_tnc_lookup_nm(struct ubifs_info *c, const union ubifs_key *key,
+ void *node, const struct qstr *nm)
+{
+ int err, len;
+ const struct ubifs_dent_node *dent = node;
+
+ /*
+ * We assume that in most of the cases there are no name collisions and
+ * 'ubifs_tnc_lookup()' returns us the right direntry.
+ */
+ err = ubifs_tnc_lookup(c, key, node);
+ if (err)
+ return err;
+
+ len = le16_to_cpu(dent->nlen);
+ if (nm->len == len && !memcmp(dent->name, nm->name, len))
+ return 0;
+
+ /*
+ * Unluckily, there are hash collisions and we have to iterate over
+ * them look at each direntry with colliding name hash sequentially.
+ */
+ return do_lookup_nm(c, key, node, nm);
+}
+
+/**
+ * correct_parent_keys - correct parent znodes' keys.
+ * @c: UBIFS file-system description object
+ * @znode: znode to correct parent znodes for
+ *
+ * This is a helper function for 'tnc_insert()'. When the key of the leftmost
+ * zbranch changes, keys of parent znodes have to be corrected. This helper
+ * function is called in such situations and corrects the keys if needed.
+ */
+static void correct_parent_keys(const struct ubifs_info *c,
+ struct ubifs_znode *znode)
+{
+ union ubifs_key *key, *key1;
+
+ ubifs_assert(znode->parent);
+ ubifs_assert(znode->iip == 0);
+
+ key = &znode->zbranch[0].key;
+ key1 = &znode->parent->zbranch[0].key;
+
+ while (keys_cmp(c, key, key1) < 0) {
+ key_copy(c, key, key1);
+ znode = znode->parent;
+ if (!znode->parent || znode->iip)
+ break;
+ key1 = &znode->parent->zbranch[0].key;
+ }
+}
+
+/**
+ * insert_zbranch - insert a zbranch into a znode.
+ * @znode: znode into which to insert
+ * @zbr: zbranch to insert
+ * @n: slot number to insert to
+ *
+ * This is a helper function for 'tnc_insert()'. UBIFS does not allow "gaps" in
+ * znode's array of zbranches and keeps zbranches consolidated, so when a new
+ * zbranch has to be inserted to the @znode->zbranches[]' array at the @n-th
+ * slot, zbranches starting from @n have to be moved right.
+ */
+static void insert_zbranch(struct ubifs_znode *znode,
+ const struct ubifs_zbranch *zbr, int n)
+{
+ int i;
+
+ ubifs_assert(ubifs_zn_dirty(znode));
+
+ if (znode->level) {
+ for (i = znode->child_cnt; i > n; i--) {
+ znode->zbranch[i] = znode->zbranch[i - 1];
+ if (znode->zbranch[i].znode)
+ znode->zbranch[i].znode->iip = i;
+ }
+ if (zbr->znode)
+ zbr->znode->iip = n;
+ } else
+ for (i = znode->child_cnt; i > n; i--)
+ znode->zbranch[i] = znode->zbranch[i - 1];
+
+ znode->zbranch[n] = *zbr;
+ znode->child_cnt += 1;
+
+ /*
+ * After inserting at slot zero, the lower bound of the key range of
+ * this znode may have changed. If this znode is subsequently split
+ * then the upper bound of the key range may change, and furthermore
+ * it could change to be lower than the original lower bound. If that
+ * happens, then it will no longer be possible to find this znode in the
+ * TNC using the key from the index node on flash. That is bad because
+ * if it is not found, we will assume it is obsolete and may overwrite
+ * it. Then if there is an unclean unmount, we will start using the
+ * old index which will be broken.
+ *
+ * So we first mark znodes that have insertions at slot zero, and then
+ * if they are split we add their lnum/offs to the old_idx tree.
+ */
+ if (n == 0)
+ znode->alt = 1;
+}
+
+/**
+ * tnc_insert - insert a node into TNC.
+ * @c: UBIFS file-system description object
+ * @znode: znode to insert into
+ * @zbr: branch to insert
+ * @n: slot number to insert new zbranch to
+ *
+ * This function inserts a new node described by @zbr into znode @znode. If
+ * znode does not have a free slot for new zbranch, it is split. Parent znodes
+ * are splat as well if needed. Returns zero in case of success or a negative
+ * error code in case of failure.
+ */
+static int tnc_insert(struct ubifs_info *c, struct ubifs_znode *znode,
+ struct ubifs_zbranch *zbr, int n)
+{
+ struct ubifs_znode *zn, *zi, *zp;
+ int i, keep, move, appending = 0;
+ union ubifs_key *key = &zbr->key;
+
+ ubifs_assert(n >= 0 && n <= c->fanout);
+
+ /* Implement naive insert for now */
+again:
+ zp = znode->parent;
+ if (znode->child_cnt < c->fanout) {
+ ubifs_assert(n != c->fanout);
+ dbg_tnc("inserted at %d level %d, key %s", n, znode->level,
+ DBGKEY(key));
+
+ insert_zbranch(znode, zbr, n);
+
+ /* Ensure parent's key is correct */
+ if (n == 0 && zp && znode->iip == 0)
+ correct_parent_keys(c, znode);
+
+ return 0;
+ }
+
+ /*
+ * Unfortunately, @znode does not have more empty slots and we have to
+ * split it.
+ */
+ dbg_tnc("splitting level %d, key %s", znode->level, DBGKEY(key));
+
+ if (znode->alt)
+ /*
+ * We can no longer be sure of finding this znode by key, so we
+ * record it in the old_idx tree.
+ */
+ ins_clr_old_idx_znode(c, znode);
+
+ zn = kzalloc(c->max_znode_sz, GFP_NOFS);
+ if (!zn)
+ return -ENOMEM;
+ zn->parent = zp;
+ zn->level = znode->level;
+
+ /* Decide where to split */
+ if (znode->level == 0 && n == c->fanout &&
+ key_type(c, key) == UBIFS_DATA_KEY) {
+ union ubifs_key *key1;
+
+ /*
+ * If this is an inode which is being appended - do not split
+ * it because no other zbranches can be inserted between
+ * zbranches of consecutive data nodes anyway.
+ */
+ key1 = &znode->zbranch[n - 1].key;
+ if (key_inum(c, key1) == key_inum(c, key) &&
+ key_type(c, key1) == UBIFS_DATA_KEY &&
+ key_block(c, key1) == key_block(c, key) - 1)
+ appending = 1;
+ }
+
+ if (appending) {
+ keep = c->fanout;
+ move = 0;
+ } else {
+ keep = (c->fanout + 1) / 2;
+ move = c->fanout - keep;
+ }
+
+ /*
+ * Although we don't at present, we could look at the neighbors and see
+ * if we can move some zbranches there.
+ */
+
+ if (n < keep) {
+ /* Insert into existing znode */
+ zi = znode;
+ move += 1;
+ keep -= 1;
+ } else {
+ /* Insert into new znode */
+ zi = zn;
+ n -= keep;
+ /* Re-parent */
+ if (zn->level != 0)
+ zbr->znode->parent = zn;
+ }
+
+ __set_bit(DIRTY_ZNODE, &zn->flags);
+ atomic_long_inc(&c->dirty_zn_cnt);
+
+ zn->child_cnt = move;
+ znode->child_cnt = keep;
+
+ dbg_tnc("moving %d, keeping %d", move, keep);
+
+ /* Move zbranch */
+ for (i = 0; i < move; i++) {
+ zn->zbranch[i] = znode->zbranch[keep + i];
+ /* Re-parent */
+ if (zn->level != 0)
+ if (zn->zbranch[i].znode) {
+ zn->zbranch[i].znode->parent = zn;
+ zn->zbranch[i].znode->iip = i;
+ }
+ }
+
+ /* Insert new key and branch */
+ dbg_tnc("inserting at %d level %d, key %s", n, zn->level, DBGKEY(key));
+
+ insert_zbranch(zi, zbr, n);
+
+ /* Insert new znode (produced by spitting) into the parent */
+ if (zp) {
+ i = n;
+ /* Locate insertion point */
+ n = znode->iip + 1;
+ if (appending && n != c->fanout)
+ appending = 0;
+
+ if (i == 0 && zi == znode && znode->iip == 0)
+ correct_parent_keys(c, znode);
+
+ /* Tail recursion */
+ zbr->key = zn->zbranch[0].key;
+ zbr->znode = zn;
+ zbr->lnum = 0;
+ zbr->offs = 0;
+ zbr->len = 0;
+ znode = zp;
+
+ goto again;
+ }
+
+ /* We have to split root znode */
+ dbg_tnc("creating new zroot at level %d", znode->level + 1);
+
+ zi = kzalloc(c->max_znode_sz, GFP_NOFS);
+ if (!zi)
+ return -ENOMEM;
+
+ zi->child_cnt = 2;
+ zi->level = znode->level + 1;
+
+ __set_bit(DIRTY_ZNODE, &zi->flags);
+ atomic_long_inc(&c->dirty_zn_cnt);
+
+ zi->zbranch[0].key = znode->zbranch[0].key;
+ zi->zbranch[0].znode = znode;
+ zi->zbranch[0].lnum = c->zroot.lnum;
+ zi->zbranch[0].offs = c->zroot.offs;
+ zi->zbranch[0].len = c->zroot.len;
+ zi->zbranch[1].key = zn->zbranch[0].key;
+ zi->zbranch[1].znode = zn;
+
+ c->zroot.lnum = 0;
+ c->zroot.offs = 0;
+ c->zroot.len = 0;
+ c->zroot.znode = zi;
+
+ zn->parent = zi;
+ zn->iip = 1;
+ znode->parent = zi;
+ znode->iip = 0;
+
+ return 0;
+}
+
+/**
+ * ubifs_tnc_add - add a node to TNC.
+ * @c: UBIFS file-system description object
+ * @key: key to add
+ * @lnum: LEB number of node
+ * @offs: node offset
+ * @len: node length
+ *
+ * This function adds a node with key @key to TNC. The node may be new or it may
+ * obsolete some existing one. Returns %0 on success or negative error code on
+ * failure.
+ */
+int ubifs_tnc_add(struct ubifs_info *c, const union ubifs_key *key, int lnum,
+ int offs, int len)
+{
+ int found, n, err = 0;
+ struct ubifs_znode *znode;
+
+ mutex_lock(&c->tnc_mutex);
+ dbg_tnc("%d:%d, len %d, key %s", lnum, offs, len, DBGKEY(key));
+ found = lookup_level0_dirty(c, key, &znode, &n);
+ if (!found) {
+ struct ubifs_zbranch zbr;
+
+ zbr.znode = NULL;
+ zbr.lnum = lnum;
+ zbr.offs = offs;
+ zbr.len = len;
+ key_copy(c, key, &zbr.key);
+ err = tnc_insert(c, znode, &zbr, n + 1);
+ } else if (found == 1) {
+ struct ubifs_zbranch *zbr = &znode->zbranch[n];
+
+ lnc_free(zbr);
+ err = ubifs_add_dirt(c, zbr->lnum, zbr->len);
+ zbr->lnum = lnum;
+ zbr->offs = offs;
+ zbr->len = len;
+ } else
+ err = found;
+ if (!err)
+ err = dbg_check_tnc(c, 0);
+ mutex_unlock(&c->tnc_mutex);
+
+ return err;
+}
+
+/**
+ * ubifs_tnc_replace - replace a node in the TNC only if the old node is found.
+ * @c: UBIFS file-system description object
+ * @key: key to add
+ * @old_lnum: LEB number of old node
+ * @old_offs: old node offset
+ * @lnum: LEB number of node
+ * @offs: node offset
+ * @len: node length
+ *
+ * This function replaces a node with key @key in the TNC only if the old node
+ * is found. This function is called by garbage collection when node are moved.
+ * Returns %0 on success or negative error code on failure.
+ */
+int ubifs_tnc_replace(struct ubifs_info *c, const union ubifs_key *key,
+ int old_lnum, int old_offs, int lnum, int offs, int len)
+{
+ int found, n, err = 0;
+ struct ubifs_znode *znode;
+
+ mutex_lock(&c->tnc_mutex);
+ dbg_tnc("old LEB %d:%d, new LEB %d:%d, len %d, key %s", old_lnum,
+ old_offs, lnum, offs, len, DBGKEY(key));
+ found = lookup_level0_dirty(c, key, &znode, &n);
+ if (found < 0) {
+ err = found;
+ goto out_unlock;
+ }
+
+ if (found == 1) {
+ struct ubifs_zbranch *zbr = &znode->zbranch[n];
+
+ found = 0;
+ if (zbr->lnum == old_lnum && zbr->offs == old_offs) {
+ lnc_free(zbr);
+ err = ubifs_add_dirt(c, zbr->lnum, zbr->len);
+ if (err)
+ goto out_unlock;
+ zbr->lnum = lnum;
+ zbr->offs = offs;
+ zbr->len = len;
+ found = 1;
+ } else if (is_hash_key(c, key)) {
+ found = resolve_collision_directly(c, key, &znode, &n,
+ old_lnum, old_offs);
+ dbg_tnc("rc returned %d, znode %p, n %d, LEB %d:%d",
+ found, znode, n, old_lnum, old_offs);
+ if (found < 0) {
+ err = found;
+ goto out_unlock;
+ }
+
+ if (found) {
+ /* Ensure the znode is dirtied */
+ if (znode->cnext || !ubifs_zn_dirty(znode)) {
+ znode = dirty_cow_bottom_up(c,
+ znode);
+ if (IS_ERR(znode)) {
+ err = PTR_ERR(znode);
+ goto out_unlock;
+ }
+ }
+ zbr = &znode->zbranch[n];
+ lnc_free(zbr);
+ err = ubifs_add_dirt(c, zbr->lnum,
+ zbr->len);
+ if (err)
+ goto out_unlock;
+ zbr->lnum = lnum;
+ zbr->offs = offs;
+ zbr->len = len;
+ }
+ }
+ }
+
+ if (!found)
+ err = ubifs_add_dirt(c, lnum, len);
+
+ if (!err)
+ err = dbg_check_tnc(c, 0);
+
+out_unlock:
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * ubifs_tnc_add_nm - add a "hashed" node to TNC.
+ * @c: UBIFS file-system description object
+ * @key: key to add
+ * @lnum: LEB number of node
+ * @offs: node offset
+ * @len: node length
+ * @nm: node name
+ *
+ * This is the same as 'ubifs_tnc_add()' but it should be used with keys which
+ * may have collisions, like directory entry keys.
+ */
+int ubifs_tnc_add_nm(struct ubifs_info *c, const union ubifs_key *key,
+ int lnum, int offs, int len, const struct qstr *nm)
+{
+ int found, n, err = 0;
+ struct ubifs_znode *znode;
+
+ mutex_lock(&c->tnc_mutex);
+ dbg_tnc("LEB %d:%d, name '%.*s', key %s", lnum, offs, nm->len, nm->name,
+ DBGKEY(key));
+ found = lookup_level0_dirty(c, key, &znode, &n);
+ if (found < 0) {
+ err = found;
+ goto out_unlock;
+ }
+
+ if (found == 1) {
+ if (c->replaying)
+ found = fallible_resolve_collision(c, key, &znode, &n,
+ nm, 1);
+ else
+ found = resolve_collision(c, key, &znode, &n, nm);
+ dbg_tnc("rc returned %d, znode %p, n %d", found, znode, n);
+ if (found < 0) {
+ err = found;
+ goto out_unlock;
+ }
+
+ /* Ensure the znode is dirtied */
+ if (znode->cnext || !ubifs_zn_dirty(znode)) {
+ znode = dirty_cow_bottom_up(c, znode);
+ if (IS_ERR(znode)) {
+ err = PTR_ERR(znode);
+ goto out_unlock;
+ }
+ }
+
+ if (found == 1) {
+ struct ubifs_zbranch *zbr = &znode->zbranch[n];
+
+ lnc_free(zbr);
+ err = ubifs_add_dirt(c, zbr->lnum, zbr->len);
+ zbr->lnum = lnum;
+ zbr->offs = offs;
+ zbr->len = len;
+ goto out_unlock;
+ }
+ }
+
+ if (!found) {
+ struct ubifs_zbranch zbr;
+
+ zbr.znode = NULL;
+ zbr.lnum = lnum;
+ zbr.offs = offs;
+ zbr.len = len;
+ key_copy(c, key, &zbr.key);
+ err = tnc_insert(c, znode, &zbr, n + 1);
+ if (err)
+ goto out_unlock;
+ if (c->replaying && c->replay_sqnum < c->cs_sqnum) {
+ /*
+ * This node was moved by garbage collection. We can
+ * tell because it is in the journal but it has a
+ * sequence number earlier than the last commit-start.
+ * We did not find it in the index so there may be a
+ * dangling branch still in the index. So we remove it
+ * by passing 'ubifs_tnc_remove_nm()' the same key but
+ * an unmatchable name.
+ */
+ struct qstr noname = { .len = 0, .name = "" };
+
+ err = dbg_check_tnc(c, 0);
+ mutex_unlock(&c->tnc_mutex);
+ if (err)
+ return err;
+ return ubifs_tnc_remove_nm(c, key, &noname);
+ }
+ }
+
+out_unlock:
+ if (!err)
+ err = dbg_check_tnc(c, 0);
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * tnc_delete - delete a znode form TNC.
+ * @c: UBIFS file-system description object
+ * @znode: znode to delete from
+ * @n: zbranch slot number to delete
+ *
+ * This function deletes a leaf node from @n-th slot of @znode. Returns zero in
+ * case of success and a negative error code in case of failure.
+ */
+static int tnc_delete(struct ubifs_info *c, struct ubifs_znode *znode, int n)
+{
+ struct ubifs_zbranch *zbr;
+ struct ubifs_znode *zp;
+ int i, err;
+
+ /* Delete without merge for now */
+ ubifs_assert(znode->level == 0);
+ ubifs_assert(n >= 0 && n < c->fanout);
+ dbg_tnc("deleting %s", DBGKEY(&znode->zbranch[n].key));
+
+ zbr = &znode->zbranch[n];
+ lnc_free(zbr);
+
+ err = ubifs_add_dirt(c, zbr->lnum, zbr->len);
+ if (err) {
+ dbg_dump_znode(c, znode);
+ return err;
+ }
+
+ /* We do not "gap" zbranch slots */
+ for (i = n; i < znode->child_cnt - 1; i++)
+ znode->zbranch[i] = znode->zbranch[i + 1];
+ znode->child_cnt -= 1;
+
+ if (znode->child_cnt > 0)
+ return 0;
+
+ /*
+ * This was the last zbranch, we have to delete this znode from the
+ * parent.
+ */
+
+ do {
+ ubifs_assert(!test_bit(OBSOLETE_ZNODE, &znode->flags));
+ ubifs_assert(ubifs_zn_dirty(znode));
+
+ zp = znode->parent;
+ n = znode->iip;
+
+ atomic_long_dec(&c->dirty_zn_cnt);
+
+ err = insert_old_idx_znode(c, znode);
+ if (err)
+ return err;
+
+ if (znode->cnext) {
+ __set_bit(OBSOLETE_ZNODE, &znode->flags);
+ atomic_long_inc(&c->clean_zn_cnt);
+ atomic_long_inc(&ubifs_clean_zn_cnt);
+ } else
+ kfree(znode);
+ znode = zp;
+ } while (znode->child_cnt == 1); /* while removing last child */
+
+ /* Remove from znode, entry n - 1 */
+ znode->child_cnt -= 1;
+ ubifs_assert(znode->level != 0);
+ for (i = n; i < znode->child_cnt; i++) {
+ znode->zbranch[i] = znode->zbranch[i + 1];
+ if (znode->zbranch[i].znode)
+ znode->zbranch[i].znode->iip = i;
+ }
+
+ /*
+ * If this is the root and it has only 1 child then
+ * collapse the tree.
+ */
+ if (!znode->parent) {
+ while (znode->child_cnt == 1 && znode->level != 0) {
+ zp = znode;
+ zbr = &znode->zbranch[0];
+ znode = get_znode(c, znode, 0);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ znode = dirty_cow_znode(c, zbr);
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+ znode->parent = NULL;
+ znode->iip = 0;
+ if (c->zroot.len) {
+ err = insert_old_idx(c, c->zroot.lnum,
+ c->zroot.offs);
+ if (err)
+ return err;
+ }
+ c->zroot.lnum = zbr->lnum;
+ c->zroot.offs = zbr->offs;
+ c->zroot.len = zbr->len;
+ c->zroot.znode = znode;
+ ubifs_assert(!test_bit(OBSOLETE_ZNODE,
+ &zp->flags));
+ ubifs_assert(test_bit(DIRTY_ZNODE, &zp->flags));
+ atomic_long_dec(&c->dirty_zn_cnt);
+
+ if (zp->cnext) {
+ __set_bit(OBSOLETE_ZNODE, &zp->flags);
+ atomic_long_inc(&c->clean_zn_cnt);
+ atomic_long_inc(&ubifs_clean_zn_cnt);
+ } else
+ kfree(zp);
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * ubifs_tnc_remove - remove an index entry of a node.
+ * @c: UBIFS file-system description object
+ * @key: key of node
+ *
+ * Returns %0 on success or negative error code on failure.
+ */
+int ubifs_tnc_remove(struct ubifs_info *c, const union ubifs_key *key)
+{
+ int found, n, err = 0;
+ struct ubifs_znode *znode;
+
+ mutex_lock(&c->tnc_mutex);
+ dbg_tnc("key %s", DBGKEY(key));
+ found = lookup_level0_dirty(c, key, &znode, &n);
+ if (found < 0) {
+ err = found;
+ goto out_unlock;
+ }
+ if (found == 1)
+ err = tnc_delete(c, znode, n);
+ if (!err)
+ err = dbg_check_tnc(c, 0);
+
+out_unlock:
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * ubifs_tnc_remove_nm - remove an index entry for a "hashed" node.
+ * @c: UBIFS file-system description object
+ * @key: key of node
+ * @nm: directory entry name
+ *
+ * Returns %0 on success or negative error code on failure.
+ */
+int ubifs_tnc_remove_nm(struct ubifs_info *c, const union ubifs_key *key,
+ const struct qstr *nm)
+{
+ int n, err;
+ struct ubifs_znode *znode;
+
+ mutex_lock(&c->tnc_mutex);
+ dbg_tnc("%.*s, key %s", nm->len, nm->name, DBGKEY(key));
+ err = lookup_level0_dirty(c, key, &znode, &n);
+ if (err < 0)
+ goto out_unlock;
+
+ if (err) {
+ if (c->replaying)
+ err = fallible_resolve_collision(c, key, &znode, &n,
+ nm, 0);
+ else
+ err = resolve_collision(c, key, &znode, &n, nm);
+ dbg_tnc("rc returned %d, znode %p, n %d", err, znode, n);
+ if (err < 0)
+ goto out_unlock;
+ if (err) {
+ /* Ensure the znode is dirtied */
+ if (znode->cnext || !ubifs_zn_dirty(znode)) {
+ znode = dirty_cow_bottom_up(c, znode);
+ if (IS_ERR(znode)) {
+ err = PTR_ERR(znode);
+ goto out_unlock;
+ }
+ }
+ err = tnc_delete(c, znode, n);
+ }
+ }
+
+out_unlock:
+ if (!err)
+ err = dbg_check_tnc(c, 0);
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * key_in_range - determine if a key falls within a range of keys.
+ * @c: UBIFS file-system description object
+ * @key: key to check
+ * @from_key: lowest key in range
+ * @to_key: highest key in range
+ *
+ * This function returns %1 if the key is in range and %0 otherwise.
+ */
+static int key_in_range(struct ubifs_info *c, union ubifs_key *key,
+ union ubifs_key *from_key, union ubifs_key *to_key)
+{
+ if (keys_cmp(c, key, from_key) < 0)
+ return 0;
+ if (keys_cmp(c, key, to_key) > 0)
+ return 0;
+ return 1;
+}
+
+/**
+ * ubifs_tnc_remove_range - remove index entries in range.
+ * @c: UBIFS file-system description object
+ * @from_key: lowest key to remove
+ * @to_key: highest key to remove
+ *
+ * This function removes index entries starting at @from_key and ending at
+ * @to_key. This function returns zero in case of success and a negative error
+ * code in case of failure.
+ */
+int ubifs_tnc_remove_range(struct ubifs_info *c, union ubifs_key *from_key,
+ union ubifs_key *to_key)
+{
+ int i, n, k, err = 0;
+ struct ubifs_znode *znode;
+ union ubifs_key *key;
+
+ mutex_lock(&c->tnc_mutex);
+ while (1) {
+ /* Find first level 0 znode that contains keys to remove */
+ err = ubifs_lookup_level0(c, from_key, &znode, &n);
+ if (err < 0)
+ goto out_unlock;
+
+ if (err)
+ key = from_key;
+ else {
+ err = tnc_next(c, &znode, &n);
+ if (err == -ENOENT) {
+ err = 0;
+ goto out_unlock;
+ }
+ if (err < 0)
+ goto out_unlock;
+ key = &znode->zbranch[n].key;
+ if (!key_in_range(c, key, from_key, to_key)) {
+ err = 0;
+ goto out_unlock;
+ }
+ }
+
+ /* Ensure the znode is dirtied */
+ if (znode->cnext || !ubifs_zn_dirty(znode)) {
+ znode = dirty_cow_bottom_up(c, znode);
+ if (IS_ERR(znode)) {
+ err = PTR_ERR(znode);
+ goto out_unlock;
+ }
+ }
+
+ /* Remove all keys in range except the first */
+ for (i = n + 1, k = 0; i < znode->child_cnt; i++, k++) {
+ key = &znode->zbranch[i].key;
+ if (!key_in_range(c, key, from_key, to_key))
+ break;
+ lnc_free(&znode->zbranch[i]);
+ err = ubifs_add_dirt(c, znode->zbranch[i].lnum,
+ znode->zbranch[i].len);
+ if (err) {
+ dbg_dump_znode(c, znode);
+ goto out_unlock;
+ }
+ dbg_tnc("removing %s", DBGKEY(key));
+ }
+ if (k) {
+ for (i = n + 1 + k; i < znode->child_cnt; i++)
+ znode->zbranch[i - k] = znode->zbranch[i];
+ znode->child_cnt -= k;
+ }
+
+ /* Now delete the first */
+ err = tnc_delete(c, znode, n);
+ if (err)
+ goto out_unlock;
+ }
+
+out_unlock:
+ if (!err)
+ err = dbg_check_tnc(c, 0);
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * ubifs_tnc_remove_ino - remove an inode from TNC.
+ * @c: UBIFS file-system description object
+ * @inum: inode number to remove
+ *
+ * This function remove inode @inum and all the extended attributes associated
+ * with the anode from TNC and returns zero in case of success or a negative
+ * error code in case of failure.
+ */
+int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum)
+{
+ union ubifs_key key1, key2;
+ struct ubifs_dent_node *xent, *pxent = NULL;
+ struct qstr nm = { .name = NULL };
+
+ dbg_tnc("ino %lu", inum);
+
+ /*
+ * Walk all extended attribute entries and remove them together with
+ * corresponding extended attribute inodes.
+ */
+ lowest_xent_key(c, &key1, inum);
+ while (1) {
+ ino_t xattr_inum;
+ int err;
+
+ xent = ubifs_tnc_next_ent(c, &key1, &nm);
+ if (IS_ERR(xent)) {
+ err = PTR_ERR(xent);
+ if (err == -ENOENT)
+ break;
+ return err;
+ }
+
+ xattr_inum = le64_to_cpu(xent->inum);
+ dbg_tnc("xent '%s', ino %lu", xent->name, xattr_inum);
+
+ nm.name = xent->name;
+ nm.len = le16_to_cpu(xent->nlen);
+ err = ubifs_tnc_remove_nm(c, &key1, &nm);
+ if (err) {
+ kfree(xent);
+ return err;
+ }
+
+ lowest_ino_key(c, &key1, xattr_inum);
+ highest_ino_key(c, &key2, xattr_inum);
+ err = ubifs_tnc_remove_range(c, &key1, &key2);
+ if (err) {
+ kfree(xent);
+ return err;
+ }
+
+ kfree(pxent);
+ pxent = xent;
+ key_read(c, &xent->key, &key1);
+ }
+
+ kfree(pxent);
+ lowest_ino_key(c, &key1, inum);
+ highest_ino_key(c, &key2, inum);
+
+ return ubifs_tnc_remove_range(c, &key1, &key2);
+}
+
+/**
+ * ubifs_tnc_next_ent - walk directory or extended attribute entries.
+ * @c: UBIFS file-system description object
+ * @key: key of last entry
+ * @nm: name of last entry found or %NULL
+ *
+ * This function finds and reads the next directory or extended attribute entry
+ * after the given key (@key) if there is one. @nm is used to resolve
+ * collisions.
+ *
+ * If the name of the current entry is not known and only the key is known,
+ * @nm->name has to be %NULL. In this case the semantics of this function is a
+ * little bit different and it returns the entry corresponding to this key, not
+ * the next one. If the key was not found, the closest "right" entry is
+ * returned.
+ *
+ * If the fist entry has to be found, @key has to contain the lowest possible
+ * key value for this inode and @name has to be %NULL.
+ *
+ * This function returns the found directory or extended attribute entry node
+ * in case of success, %-ENOENT is returned if no entry was found, and a
+ * negative error code is returned in case of failure.
+ */
+struct ubifs_dent_node *ubifs_tnc_next_ent(struct ubifs_info *c,
+ union ubifs_key *key,
+ const struct qstr *nm)
+{
+ int n, err, type = key_type(c, key);
+ struct ubifs_znode *znode;
+ struct ubifs_dent_node *dent;
+ struct ubifs_zbranch *zbr;
+ union ubifs_key *dkey;
+
+ dbg_tnc("%s %s", nm->name ? (char *)nm->name : "(lowest)", DBGKEY(key));
+ ubifs_assert(is_hash_key(c, key));
+
+ mutex_lock(&c->tnc_mutex);
+ err = ubifs_lookup_level0(c, key, &znode, &n);
+ if (unlikely(err < 0))
+ goto out_unlock;
+
+ if (nm->name) {
+ if (err) {
+ /* Handle collisions */
+ err = resolve_collision(c, key, &znode, &n, nm);
+ dbg_tnc("rc returned %d, znode %p, n %d",
+ err, znode, n);
+ if (unlikely(err < 0))
+ goto out_unlock;
+ }
+
+ /* Now find next entry */
+ err = tnc_next(c, &znode, &n);
+ if (unlikely(err))
+ goto out_unlock;
+ } else {
+ /*
+ * The full name of the entry was not given, in which case the
+ * behavior of this function is a little different and it
+ * returns current entry, not the next one.
+ */
+ if (!err) {
+ /*
+ * However, the given key does not exist in the TNC
+ * tree and @znode/@n variables contain the closest
+ * "preceding" element. Switch to the next one.
+ */
+ err = tnc_next(c, &znode, &n);
+ if (err)
+ goto out_unlock;
+ }
+ }
+
+ zbr = &znode->zbranch[n];
+ dent = kmalloc(zbr->len, GFP_NOFS);
+ if (unlikely(!dent)) {
+ err = -ENOMEM;
+ goto out_unlock;
+ }
+
+ /*
+ * The above 'tnc_next()' call could lead us to the next inode, check
+ * this.
+ */
+ dkey = &zbr->key;
+ if (key_inum(c, dkey) != key_inum(c, key) ||
+ key_type(c, dkey) != type) {
+ err = -ENOENT;
+ goto out_free;
+ }
+
+ err = tnc_read_node_nm(c, zbr, dent);
+ if (unlikely(err))
+ goto out_free;
+
+ mutex_unlock(&c->tnc_mutex);
+ return dent;
+
+out_free:
+ kfree(dent);
+out_unlock:
+ mutex_unlock(&c->tnc_mutex);
+ return ERR_PTR(err);
+}
+
+/**
+ * tnc_destroy_cnext - destroy left-over obsolete znodes from a failed commit.
+ * @c: UBIFS file-system description object
+ *
+ * Destroy left-over obsolete znodes from a failed commit.
+ */
+static void tnc_destroy_cnext(struct ubifs_info *c)
+{
+ struct ubifs_znode *cnext;
+
+ if (!c->cnext)
+ return;
+ ubifs_assert(c->cmt_state == COMMIT_BROKEN);
+ cnext = c->cnext;
+ do {
+ struct ubifs_znode *znode = cnext;
+
+ cnext = cnext->cnext;
+ if (test_bit(OBSOLETE_ZNODE, &znode->flags))
+ kfree(znode);
+ } while (cnext && cnext != c->cnext);
+}
+
+/**
+ * ubifs_tnc_close - close TNC subsystem and free all related resources.
+ * @c: UBIFS file-system description object
+ */
+void ubifs_tnc_close(struct ubifs_info *c)
+{
+ long clean_freed;
+
+ tnc_destroy_cnext(c);
+ if (c->zroot.znode) {
+ clean_freed = ubifs_destroy_tnc_subtree(c->zroot.znode);
+ atomic_long_sub(clean_freed, &ubifs_clean_zn_cnt);
+ }
+ kfree(c->gap_lebs);
+ kfree(c->ilebs);
+ destroy_old_idx(c);
+}
+
+/**
+ * left_znode - get the znode to the left.
+ * @c: UBIFS file-system description object
+ * @znode: znode
+ *
+ * This function returns a pointer to the znode to the left of @znode or NULL if
+ * there is not one. A negative error code is returned on failure.
+ */
+static struct ubifs_znode *left_znode(struct ubifs_info *c,
+ struct ubifs_znode *znode)
+{
+ int level = znode->level;
+
+ while (1) {
+ int n = znode->iip - 1;
+
+ /* Go up until we can go left */
+ znode = znode->parent;
+ if (!znode)
+ return NULL;
+ if (n >= 0) {
+ /* Now go down the rightmost branch to 'level' */
+ znode = get_znode(c, znode, n);
+ if (IS_ERR(znode))
+ return znode;
+ while (znode->level != level) {
+ n = znode->child_cnt - 1;
+ znode = get_znode(c, znode, n);
+ if (IS_ERR(znode))
+ return znode;
+ }
+ break;
+ }
+ }
+ return znode;
+}
+
+/**
+ * right_znode - get the znode to the right.
+ * @c: UBIFS file-system description object
+ * @znode: znode
+ *
+ * This function returns a pointer to the znode to the right of @znode or NULL
+ * if there is not one. A negative error code is returned on failure.
+ */
+static struct ubifs_znode *right_znode(struct ubifs_info *c,
+ struct ubifs_znode *znode)
+{
+ int level = znode->level;
+
+ while (1) {
+ int n = znode->iip + 1;
+
+ /* Go up until we can go right */
+ znode = znode->parent;
+ if (!znode)
+ return NULL;
+ if (n < znode->child_cnt) {
+ /* Now go down the leftmost branch to 'level' */
+ znode = get_znode(c, znode, n);
+ if (IS_ERR(znode))
+ return znode;
+ while (znode->level != level) {
+ znode = get_znode(c, znode, 0);
+ if (IS_ERR(znode))
+ return znode;
+ }
+ break;
+ }
+ }
+ return znode;
+}
+
+/**
+ * lookup_znode - find a particular indexing node from TNC.
+ * @c: UBIFS file-system description object
+ * @key: index node key to lookup
+ * @level: index node level
+ * @lnum: index node LEB number
+ * @offs: index node offset
+ *
+ * This function searches an indexing node by its first key @key and its
+ * address @lnum:@offs. It looks up the indexing tree by pulling all indexing
+ * nodes it traverses to TNC. This function is called fro indexing nodes which
+ * were found on the media by scanning, for example when garbage-collecting or
+ * when doing in-the-gaps commit. This means that the indexing node which is
+ * looked for does not have to have exactly the same leftmost key @key, because
+ * the leftmost key may have been changed, in which case TNC will contain a
+ * dirty znode which still refers the same @lnum:@offs. This function is clever
+ * enough to recognize such indexing nodes.
+ *
+ * Note, if a znode was deleted or changed too much, then this function will
+ * not find it. For situations like this UBIFS has the old index RB-tree
+ * (indexed by @lnum:@offs).
+ *
+ * This function returns a pointer to the znode found or %NULL if it is not
+ * found. A negative error code is returned on failure.
+ */
+static struct ubifs_znode *lookup_znode(struct ubifs_info *c,
+ union ubifs_key *key, int level,
+ int lnum, int offs)
+{
+ struct ubifs_znode *znode, *zn;
+ int n, nn;
+
+ /*
+ * The arguments have probably been read off flash, so don't assume
+ * they are valid.
+ */
+ if (level < 0)
+ return ERR_PTR(-EINVAL);
+
+ /* Get the root znode */
+ znode = c->zroot.znode;
+ if (!znode) {
+ znode = ubifs_load_znode(c, &c->zroot, NULL, 0);
+ if (IS_ERR(znode))
+ return znode;
+ }
+ /* Check if it is the one we are looking for */
+ if (c->zroot.lnum == lnum && c->zroot.offs == offs)
+ return znode;
+ /* Descend to the parent level i.e. (level + 1) */
+ if (level >= znode->level)
+ return NULL;
+ while (1) {
+ ubifs_search_zbranch(c, znode, key, &n);
+ if (n < 0) {
+ /*
+ * We reached a znode where the leftmost key is greater
+ * than the key we are searching for. This is the same
+ * situation as the one described in a huge comment at
+ * the end of the 'ubifs_lookup_level0()' function. And
+ * for exactly the same reasons we have to try to look
+ * left before giving up.
+ */
+ znode = left_znode(c, znode);
+ if (!znode)
+ return NULL;
+ if (IS_ERR(znode))
+ return znode;
+ ubifs_search_zbranch(c, znode, key, &n);
+ ubifs_assert(n >= 0);
+ }
+ if (znode->level == level + 1)
+ break;
+ znode = get_znode(c, znode, n);
+ if (IS_ERR(znode))
+ return znode;
+ }
+ /* Check if the child is the one we are looking for */
+ if (znode->zbranch[n].lnum == lnum && znode->zbranch[n].offs == offs)
+ return get_znode(c, znode, n);
+ /* If the key is unique, there is nowhere else to look */
+ if (!is_hash_key(c, key))
+ return NULL;
+ /*
+ * The key is not unique and so may be also in the znodes to either
+ * side.
+ */
+ zn = znode;
+ nn = n;
+ /* Look left */
+ while (1) {
+ /* Move one branch to the left */
+ if (n)
+ n -= 1;
+ else {
+ znode = left_znode(c, znode);
+ if (!znode)
+ break;
+ if (IS_ERR(znode))
+ return znode;
+ n = znode->child_cnt - 1;
+ }
+ /* Check it */
+ if (znode->zbranch[n].lnum == lnum &&
+ znode->zbranch[n].offs == offs)
+ return get_znode(c, znode, n);
+ /* Stop if the key is less than the one we are looking for */
+ if (keys_cmp(c, &znode->zbranch[n].key, key) < 0)
+ break;
+ }
+ /* Back to the middle */
+ znode = zn;
+ n = nn;
+ /* Look right */
+ while (1) {
+ /* Move one branch to the right */
+ if (++n >= znode->child_cnt) {
+ znode = right_znode(c, znode);
+ if (!znode)
+ break;
+ if (IS_ERR(znode))
+ return znode;
+ n = 0;
+ }
+ /* Check it */
+ if (znode->zbranch[n].lnum == lnum &&
+ znode->zbranch[n].offs == offs)
+ return get_znode(c, znode, n);
+ /* Stop if the key is greater than the one we are looking for */
+ if (keys_cmp(c, &znode->zbranch[n].key, key) > 0)
+ break;
+ }
+ return NULL;
+}
+
+/**
+ * is_idx_node_in_tnc - determine if an index node is in the TNC.
+ * @c: UBIFS file-system description object
+ * @key: key of index node
+ * @level: index node level
+ * @lnum: LEB number of index node
+ * @offs: offset of index node
+ *
+ * This function returns %0 if the index node is not referred to in the TNC, %1
+ * if the index node is referred to in the TNC and the corresponding znode is
+ * dirty, %2 if an index node is referred to in the TNC and the corresponding
+ * znode is clean, and a negative error code in case of failure.
+ *
+ * Note, the @key argument has to be the key of the first child. Also note,
+ * this function relies on the fact that 0:0 is never a valid LEB number and
+ * offset for a main-area node.
+ */
+int is_idx_node_in_tnc(struct ubifs_info *c, union ubifs_key *key, int level,
+ int lnum, int offs)
+{
+ struct ubifs_znode *znode;
+
+ znode = lookup_znode(c, key, level, lnum, offs);
+ if (!znode)
+ return 0;
+ if (IS_ERR(znode))
+ return PTR_ERR(znode);
+
+ return ubifs_zn_dirty(znode) ? 1 : 2;
+}
+
+/**
+ * is_leaf_node_in_tnc - determine if a non-indexing not is in the TNC.
+ * @c: UBIFS file-system description object
+ * @key: node key
+ * @lnum: node LEB number
+ * @offs: node offset
+ *
+ * This function returns %1 if the node is referred to in the TNC, %0 if it is
+ * not, and a negative error code in case of failure.
+ *
+ * Note, this function relies on the fact that 0:0 is never a valid LEB number
+ * and offset for a main-area node.
+ */
+static int is_leaf_node_in_tnc(struct ubifs_info *c, union ubifs_key *key,
+ int lnum, int offs)
+{
+ struct ubifs_zbranch *zbr;
+ struct ubifs_znode *znode, *zn;
+ int n, found, err, nn;
+ const int unique = !is_hash_key(c, key);
+
+ found = ubifs_lookup_level0(c, key, &znode, &n);
+ if (found < 0)
+ return found; /* Error code */
+ if (!found)
+ return 0;
+ zbr = &znode->zbranch[n];
+ if (lnum == zbr->lnum && offs == zbr->offs)
+ return 1; /* Found it */
+ if (unique)
+ return 0;
+ /*
+ * Because the key is not unique, we have to look left
+ * and right as well
+ */
+ zn = znode;
+ nn = n;
+ /* Look left */
+ while (1) {
+ err = tnc_prev(c, &znode, &n);
+ if (err == -ENOENT)
+ break;
+ if (err)
+ return err;
+ if (keys_cmp(c, key, &znode->zbranch[n].key))
+ break;
+ zbr = &znode->zbranch[n];
+ if (lnum == zbr->lnum && offs == zbr->offs)
+ return 1; /* Found it */
+ }
+ /* Look right */
+ znode = zn;
+ n = nn;
+ while (1) {
+ err = tnc_next(c, &znode, &n);
+ if (err) {
+ if (err == -ENOENT)
+ return 0;
+ return err;
+ }
+ if (keys_cmp(c, key, &znode->zbranch[n].key))
+ break;
+ zbr = &znode->zbranch[n];
+ if (lnum == zbr->lnum && offs == zbr->offs)
+ return 1; /* Found it */
+ }
+ return 0;
+}
+
+/**
+ * ubifs_tnc_has_node - determine whether a node is in the TNC.
+ * @c: UBIFS file-system description object
+ * @key: node key
+ * @level: index node level (if it is an index node)
+ * @lnum: node LEB number
+ * @offs: node offset
+ * @is_idx: non-zero if the node is an index node
+ *
+ * This function returns %1 if the node is in the TNC, %0 if it is not, and a
+ * negative error code in case of failure. For index nodes, @key has to be the
+ * key of the first child. An index node is considered to be in the TNC only if
+ * the corresponding znode is clean or has not been loaded.
+ */
+int ubifs_tnc_has_node(struct ubifs_info *c, union ubifs_key *key, int level,
+ int lnum, int offs, int is_idx)
+{
+ int err;
+
+ mutex_lock(&c->tnc_mutex);
+ if (is_idx) {
+ err = is_idx_node_in_tnc(c, key, level, lnum, offs);
+ if (err < 0)
+ goto out_unlock;
+ if (err == 1)
+ /* The index node was found but it was dirty */
+ err = 0;
+ else if (err == 2)
+ /* The index node was found and it was clean */
+ err = 1;
+ else
+ BUG_ON(err != 0);
+ } else
+ err = is_leaf_node_in_tnc(c, key, lnum, offs);
+
+out_unlock:
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * ubifs_dirty_idx_node - dirty an index node.
+ * @c: UBIFS file-system description object
+ * @key: index node key
+ * @level: index node level
+ * @lnum: index node LEB number
+ * @offs: index node offset
+ *
+ * This function loads and dirties an index node so that it can be garbage
+ * collected. The @key argument has to be the key of the first child. This
+ * function relies on the fact that 0:0 is never a valid LEB number and offset
+ * for a main-area node. Returns %0 on success and a negative error code on
+ * failure.
+ */
+int ubifs_dirty_idx_node(struct ubifs_info *c, union ubifs_key *key, int level,
+ int lnum, int offs)
+{
+ struct ubifs_znode *znode;
+ int err = 0;
+
+ mutex_lock(&c->tnc_mutex);
+ znode = lookup_znode(c, key, level, lnum, offs);
+ if (!znode)
+ goto out_unlock;
+ if (IS_ERR(znode)) {
+ err = PTR_ERR(znode);
+ goto out_unlock;
+ }
+ znode = dirty_cow_bottom_up(c, znode);
+ if (IS_ERR(znode)) {
+ err = PTR_ERR(znode);
+ goto out_unlock;
+ }
+
+out_unlock:
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/tnc_commit.c avr32-2.6/fs/ubifs/tnc_commit.c
--- linux-2.6.25.6/fs/ubifs/tnc_commit.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/tnc_commit.c 2008-06-12 15:09:45.603817614 +0200
@@ -0,0 +1,1105 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/* This file implements TNC functions for committing */
+
+#include "ubifs.h"
+
+/**
+ * make_idx_node - make an index node for fill-the-gaps method of TNC commit.
+ * @c: UBIFS file-system description object
+ * @idx: buffer in which to place new index node
+ * @znode: znode from which to make new index node
+ * @lnum: LEB number where new index node will be written
+ * @offs: offset where new index node will be written
+ * @len: length of new index node
+ */
+static int make_idx_node(struct ubifs_info *c, struct ubifs_idx_node *idx,
+ struct ubifs_znode *znode, int lnum, int offs, int len)
+{
+ struct ubifs_znode *zp;
+ int i, err;
+
+ /* Make index node */
+ idx->ch.node_type = UBIFS_IDX_NODE;
+ idx->child_cnt = cpu_to_le16(znode->child_cnt);
+ idx->level = cpu_to_le16(znode->level);
+ for (i = 0; i < znode->child_cnt; i++) {
+ struct ubifs_branch *br = ubifs_idx_branch(c, idx, i);
+ struct ubifs_zbranch *zbr = &znode->zbranch[i];
+
+ key_write_idx(c, &zbr->key, &br->key);
+ br->lnum = cpu_to_le32(zbr->lnum);
+ br->offs = cpu_to_le32(zbr->offs);
+ br->len = cpu_to_le32(zbr->len);
+ if (!zbr->lnum || !zbr->len) {
+ ubifs_err("bad ref in znode");
+ dbg_dump_znode(c, znode);
+ if (zbr->znode)
+ dbg_dump_znode(c, zbr->znode);
+ }
+ }
+ ubifs_prepare_node(c, idx, len, 0);
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+ znode->lnum = lnum;
+ znode->offs = offs;
+ znode->len = len;
+#endif
+
+ err = insert_old_idx_znode(c, znode);
+
+ /* Update the parent */
+ zp = znode->parent;
+ if (zp) {
+ struct ubifs_zbranch *zbr;
+
+ zbr = &zp->zbranch[znode->iip];
+ zbr->lnum = lnum;
+ zbr->offs = offs;
+ zbr->len = len;
+ } else {
+ c->zroot.lnum = lnum;
+ c->zroot.offs = offs;
+ c->zroot.len = len;
+ }
+ c->calc_idx_sz += ALIGN(len, 8);
+
+ atomic_long_dec(&c->dirty_zn_cnt);
+
+ ubifs_assert(ubifs_zn_dirty(znode));
+ ubifs_assert(test_bit(COW_ZNODE, &znode->flags));
+
+ __clear_bit(DIRTY_ZNODE, &znode->flags);
+ __clear_bit(COW_ZNODE, &znode->flags);
+
+ return err;
+}
+
+/**
+ * fill_gap - make index nodes in gaps in dirty index LEBs.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number that gap appears in
+ * @gap_start: offset of start of gap
+ * @gap_end: offset of end of gap
+ * @dirt: adds dirty space to this
+ *
+ * This function returns the number of index nodes written into the gap.
+ */
+static int fill_gap(struct ubifs_info *c, int lnum, int gap_start, int gap_end,
+ int *dirt)
+{
+ int len, gap_remains, gap_pos, written, pad_len;
+
+ ubifs_assert((gap_start & 7) == 0);
+ ubifs_assert((gap_end & 7) == 0);
+ ubifs_assert(gap_end >= gap_start);
+
+ gap_remains = gap_end - gap_start;
+ if (!gap_remains)
+ return 0;
+ gap_pos = gap_start;
+ written = 0;
+ while (c->enext) {
+ len = ubifs_idx_node_sz(c, c->enext->child_cnt);
+ if (len < gap_remains) {
+ struct ubifs_znode *znode = c->enext;
+ const int alen = ALIGN(len, 8);
+ int err;
+
+ ubifs_assert(alen <= gap_remains);
+ err = make_idx_node(c, c->ileb_buf + gap_pos, znode,
+ lnum, gap_pos, len);
+ if (err)
+ return err;
+ gap_remains -= alen;
+ gap_pos += alen;
+ c->enext = znode->cnext;
+ if (c->enext == c->cnext)
+ c->enext = NULL;
+ written += 1;
+ } else
+ break;
+ }
+ if (gap_end == c->leb_size) {
+ c->ileb_len = ALIGN(gap_pos, c->min_io_size);
+ /* Pad to end of min_io_size */
+ pad_len = c->ileb_len - gap_pos;
+ } else
+ /* Pad to end of gap */
+ pad_len = gap_remains;
+ dbg_gc("LEB %d:%d to %d len %d nodes written %d wasted bytes %d",
+ lnum, gap_start, gap_end, gap_end - gap_start, written, pad_len);
+ ubifs_pad(c, c->ileb_buf + gap_pos, pad_len);
+ *dirt += pad_len;
+ return written;
+}
+
+/**
+ * find_old_idx - find an index node obsoleted since the last commit start.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB number of obsoleted index node
+ * @offs: offset of obsoleted index node
+ *
+ * Returns %1 if found and %0 otherwise.
+ */
+static int find_old_idx(struct ubifs_info *c, int lnum, int offs)
+{
+ struct ubifs_old_idx *o;
+ struct rb_node *p;
+
+ p = c->old_idx.rb_node;
+ while (p) {
+ o = rb_entry(p, struct ubifs_old_idx, rb);
+ if (lnum < o->lnum)
+ p = p->rb_left;
+ else if (lnum > o->lnum)
+ p = p->rb_right;
+ else if (offs < o->offs)
+ p = p->rb_left;
+ else if (offs > o->offs)
+ p = p->rb_right;
+ else
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * is_idx_node_in_use - determine if an index node can be overwritten.
+ * @c: UBIFS file-system description object
+ * @key: key of index node
+ * @level: index node level
+ * @lnum: LEB number of index node
+ * @offs: offset of index node
+ *
+ * If @key / @lnum / @offs identify an index node that was not part of the old
+ * index, then this function returns %0 (obsolete). Else if the index node was
+ * part of the old index but is now dirty %1 is returned, else if it is clean %2
+ * is returned. A negative error code is returned on failure.
+ */
+static int is_idx_node_in_use(struct ubifs_info *c, union ubifs_key *key,
+ int level, int lnum, int offs)
+{
+ int ret;
+
+ ret = is_idx_node_in_tnc(c, key, level, lnum, offs);
+ if (ret < 0)
+ return ret; /* Error code */
+ if (ret == 0)
+ if (find_old_idx(c, lnum, offs))
+ return 1;
+ return ret;
+}
+
+/**
+ * layout_leb_in_gaps - layout index nodes using in-the-gaps method.
+ * @c: UBIFS file-system description object
+ * @p: return LEB number here
+ *
+ * This function lays out new index nodes for dirty znodes using in-the-gaps
+ * method of TNC commit.
+ * This function merely puts the next znode into the next gap, making no attempt
+ * to try to maximise the number of znodes that fit.
+ * This function returns the number of index nodes written into the gaps, or a
+ * negative error code on failure.
+ */
+static int layout_leb_in_gaps(struct ubifs_info *c, int *p)
+{
+ struct ubifs_scan_leb *sleb;
+ struct ubifs_scan_node *snod;
+ int lnum, dirt = 0, gap_start, gap_end, err, written, tot_written;
+
+ tot_written = 0;
+ /* Get an index LEB with lots of obsolete index nodes */
+ lnum = ubifs_find_dirty_idx_leb(c);
+ if (lnum < 0)
+ /*
+ * There also may be dirt in the index head that could be
+ * filled, however we do not check there at present.
+ */
+ return lnum; /* Error code */
+ *p = lnum;
+ dbg_gc("LEB %d", lnum);
+ /*
+ * Scan the index LEB. We use the generic scan for this even though
+ * it is more comprehensive and less efficient than is needed for this
+ * purpose.
+ */
+ sleb = ubifs_scan(c, lnum, 0, c->ileb_buf);
+ c->ileb_len = 0;
+ if (IS_ERR(sleb))
+ return PTR_ERR(sleb);
+ gap_start = 0;
+ list_for_each_entry(snod, &sleb->nodes, list) {
+ struct ubifs_idx_node *idx;
+ int in_use, level;
+
+ ubifs_assert(snod->type == UBIFS_IDX_NODE);
+ idx = snod->node;
+ key_read(c, ubifs_idx_key(c, idx), &snod->key);
+ level = le16_to_cpu(idx->level);
+ /* Determine if the index node is in use (not obsolete) */
+ in_use = is_idx_node_in_use(c, &snod->key, level, lnum,
+ snod->offs);
+ if (in_use < 0) {
+ ubifs_scan_destroy(sleb);
+ return in_use; /* Error code */
+ }
+ if (in_use) {
+ if (in_use == 1)
+ dirt += ALIGN(snod->len, 8);
+ /*
+ * The obsolete index nodes form gaps that can be
+ * overwritten. This gap has ended because we have
+ * found an index node that is still in use
+ * i.e. not obsolete
+ */
+ gap_end = snod->offs;
+ /* Try to fill gap */
+ written = fill_gap(c, lnum, gap_start, gap_end, &dirt);
+ if (written < 0) {
+ ubifs_scan_destroy(sleb);
+ return written; /* Error code */
+ }
+ tot_written += written;
+ gap_start = ALIGN(snod->offs + snod->len, 8);
+ }
+ }
+ ubifs_scan_destroy(sleb);
+ c->ileb_len = c->leb_size;
+ gap_end = c->leb_size;
+ /* Try to fill gap */
+ written = fill_gap(c, lnum, gap_start, gap_end, &dirt);
+ if (written < 0)
+ return written; /* Error code */
+ tot_written += written;
+ if (tot_written == 0) {
+ struct ubifs_lprops lp;
+
+ dbg_gc("LEB %d wrote %d index nodes", lnum, tot_written);
+ err = ubifs_read_one_lp(c, lnum, &lp);
+ if (err)
+ return err;
+ if (lp.free == c->leb_size) {
+ /*
+ * We must have snatched this LEB from the idx_gc list
+ * so we need to correct the free and dirty space.
+ */
+ err = ubifs_change_one_lp(c, lnum,
+ c->leb_size - c->ileb_len,
+ dirt, 0, 0, 0);
+ if (err)
+ return err;
+ }
+ return 0;
+ }
+ err = ubifs_change_one_lp(c, lnum, c->leb_size - c->ileb_len, dirt,
+ 0, 0, 0);
+ if (err)
+ return err;
+ err = ubi_leb_change(c->ubi, lnum, c->ileb_buf, c->ileb_len,
+ UBI_SHORTTERM);
+ if (err) {
+ ubifs_err("ubi_leb_change failed, error %d", err);
+ return err;
+ }
+ dbg_gc("LEB %d wrote %d index nodes", lnum, tot_written);
+ return tot_written;
+}
+
+/**
+ * get_leb_cnt - calculate the number of empty LEBs needed to commit.
+ * @c: UBIFS file-system description object
+ * @cnt: number of znodes to commit
+ *
+ * This function returns the number of empty LEBs needed to commit @cnt znodes
+ * to the current index head. The number is not exact and may be more than
+ * needed.
+ */
+static int get_leb_cnt(struct ubifs_info *c, int cnt)
+{
+ int d;
+
+ /* Assume maximum index node size (i.e. overestimate space needed) */
+ cnt -= (c->leb_size - c->ihead_offs) / c->max_idx_node_sz;
+ if (cnt < 0)
+ cnt = 0;
+ d = c->leb_size / c->max_idx_node_sz;
+ return DIV_ROUND_UP(cnt, d);
+}
+
+/**
+ * layout_in_gaps - in-the-gaps method of committing TNC.
+ * @c: UBIFS file-system description object
+ * @cnt: number of dirty znodes to commit.
+ *
+ * This function lays out new index nodes for dirty znodes using in-the-gaps
+ * method of TNC commit.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int layout_in_gaps(struct ubifs_info *c, int cnt)
+{
+ int err, leb_needed_cnt, written, *p;
+
+ dbg_gc("%d znodes to write", cnt);
+
+ c->gap_lebs = kmalloc(sizeof(int) * (c->lst.idx_lebs + 1), GFP_NOFS);
+ if (!c->gap_lebs)
+ return -ENOMEM;
+
+ p = c->gap_lebs;
+ do {
+ ubifs_assert(p < c->gap_lebs + sizeof(int) * c->lst.idx_lebs);
+ written = layout_leb_in_gaps(c, p);
+ if (written < 0) {
+ err = written;
+ if (err == -ENOSPC) {
+ if (!dbg_force_in_the_gaps_enabled) {
+ /*
+ * Do not print scary warnings if the
+ * debugging option which forces
+ * in-the-gaps is enabled.
+ */
+ ubifs_err("out of space");
+ spin_lock(&c->space_lock);
+ dbg_dump_budg(c);
+ spin_unlock(&c->space_lock);
+ dbg_dump_lprops(c);
+ }
+ /* Try to commit anyway */
+ err = 0;
+ break;
+ }
+ kfree(c->gap_lebs);
+ c->gap_lebs = NULL;
+ return err;
+ }
+ p++;
+ cnt -= written;
+ leb_needed_cnt = get_leb_cnt(c, cnt);
+ dbg_gc("%d znodes remaining, need %d LEBs, have %d", cnt,
+ leb_needed_cnt, c->ileb_cnt);
+ } while (leb_needed_cnt > c->ileb_cnt);
+
+ *p = -1;
+ return 0;
+}
+
+/**
+ * layout_in_empty_space - layout index nodes in empty space.
+ * @c: UBIFS file-system description object
+ *
+ * This function lays out new index nodes for dirty znodes using empty LEBs.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int layout_in_empty_space(struct ubifs_info *c)
+{
+ struct ubifs_znode *znode, *cnext, *zp;
+ int lnum, offs, len, next_len, buf_len, buf_offs, used, avail;
+ int wlen, blen, err;
+
+ cnext = c->enext;
+ if (!cnext)
+ return 0;
+
+ lnum = c->ihead_lnum;
+ buf_offs = c->ihead_offs;
+
+ buf_len = ubifs_idx_node_sz(c, c->fanout);
+ buf_len = ALIGN(buf_len, c->min_io_size);
+ used = 0;
+ avail = buf_len;
+
+ /* Ensure there is enough room for first write */
+ next_len = ubifs_idx_node_sz(c, cnext->child_cnt);
+ if (buf_offs + next_len > c->leb_size)
+ lnum = -1;
+
+ while (1) {
+ znode = cnext;
+
+ len = ubifs_idx_node_sz(c, znode->child_cnt);
+
+ /* Determine the index node position */
+ if (lnum == -1) {
+ if (c->ileb_nxt >= c->ileb_cnt) {
+ ubifs_err("out of space");
+ return -ENOSPC;
+ }
+ lnum = c->ilebs[c->ileb_nxt++];
+ buf_offs = 0;
+ used = 0;
+ avail = buf_len;
+ }
+
+ offs = buf_offs + used;
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+ znode->lnum = lnum;
+ znode->offs = offs;
+ znode->len = len;
+#endif
+
+ /* Update the parent */
+ zp = znode->parent;
+ if (zp) {
+ struct ubifs_zbranch *zbr;
+ int i;
+
+ i = znode->iip;
+ zbr = &zp->zbranch[i];
+ zbr->lnum = lnum;
+ zbr->offs = offs;
+ zbr->len = len;
+ } else {
+ c->zroot.lnum = lnum;
+ c->zroot.offs = offs;
+ c->zroot.len = len;
+ }
+ c->calc_idx_sz += ALIGN(len, 8);
+
+ /*
+ * Once lprops is updated, we can decrease the dirty znode count
+ * but it is easier to just do it here.
+ */
+ atomic_long_dec(&c->dirty_zn_cnt);
+
+ /*
+ * Calculate the next index node length to see if there is
+ * enough room for it
+ */
+ cnext = znode->cnext;
+ if (cnext == c->cnext)
+ next_len = 0;
+ else
+ next_len = ubifs_idx_node_sz(c, cnext->child_cnt);
+
+ if (c->min_io_size == 1) {
+ buf_offs += ALIGN(len, 8);
+ if (next_len) {
+ if (buf_offs + next_len <= c->leb_size)
+ continue;
+ err = ubifs_update_one_lp(c, lnum, 0,
+ c->leb_size - buf_offs, 0, 0);
+ if (err)
+ return err;
+ lnum = -1;
+ continue;
+ }
+ err = ubifs_update_one_lp(c, lnum,
+ c->leb_size - buf_offs, 0, 0, 0);
+ if (err)
+ return err;
+ break;
+ }
+
+ /* Update buffer positions */
+ wlen = used + len;
+ used += ALIGN(len, 8);
+ avail -= ALIGN(len, 8);
+
+ if (next_len != 0 &&
+ buf_offs + used + next_len <= c->leb_size &&
+ avail > 0)
+ continue;
+
+ if (avail <= 0 && next_len &&
+ buf_offs + used + next_len <= c->leb_size)
+ blen = buf_len;
+ else
+ blen = ALIGN(wlen, c->min_io_size);
+
+ /* The buffer is full or there are no more znodes to do */
+ buf_offs += blen;
+ if (next_len) {
+ if (buf_offs + next_len > c->leb_size) {
+ err = ubifs_update_one_lp(c, lnum,
+ c->leb_size - buf_offs, blen - used,
+ 0, 0);
+ if (err)
+ return err;
+ lnum = -1;
+ }
+ used -= blen;
+ if (used < 0)
+ used = 0;
+ avail = buf_len - used;
+ continue;
+ }
+ err = ubifs_update_one_lp(c, lnum, c->leb_size - buf_offs,
+ blen - used, 0, 0);
+ if (err)
+ return err;
+ break;
+ }
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+ c->new_ihead_lnum = lnum;
+ c->new_ihead_offs = buf_offs;
+#endif
+
+ return 0;
+}
+
+/**
+ * layout_commit - determine positions of index nodes to commit.
+ * @c: UBIFS file-system description object
+ * @no_space: indicates that insufficient empty LEBs were allocated
+ * @cnt: number of znodes to commit
+ *
+ * Calculate and update the positions of index nodes to commit. If there were
+ * an insufficient number of empty LEBs allocated, then index nodes are placed
+ * into the gaps created by obsolete index nodes in non-empty index LEBs. For
+ * this purpose, an obsolete index node is one that was not in the index as at
+ * the end of the last commit. To write "in-the-gaps" requires that those index
+ * LEBs are updated atomically in-place.
+ */
+static int layout_commit(struct ubifs_info *c, int no_space, int cnt)
+{
+ int err;
+
+ if (no_space) {
+ err = layout_in_gaps(c, cnt);
+ if (err)
+ return err;
+ }
+ err = layout_in_empty_space(c);
+ return err;
+}
+
+/**
+ * find_first_dirty - find first dirty znode.
+ * @znode: znode to begin searching from
+ */
+static struct ubifs_znode *find_first_dirty(struct ubifs_znode *znode)
+{
+ int i, cont;
+
+ if (!znode)
+ return NULL;
+
+ while (1) {
+ if (znode->level == 0) {
+ if (ubifs_zn_dirty(znode))
+ return znode;
+ return NULL;
+ }
+ cont = 0;
+ for (i = 0; i < znode->child_cnt; i++) {
+ struct ubifs_zbranch *zbr = &znode->zbranch[i];
+
+ if (zbr->znode && ubifs_zn_dirty(zbr->znode)) {
+ znode = zbr->znode;
+ cont = 1;
+ break;
+ }
+ }
+ if (!cont) {
+ if (ubifs_zn_dirty(znode))
+ return znode;
+ return NULL;
+ }
+ }
+}
+
+/**
+ * find_next_dirty - find next dirty znode.
+ * @znode: znode to begin searching from
+ */
+static struct ubifs_znode *find_next_dirty(struct ubifs_znode *znode)
+{
+ int n = znode->iip + 1;
+
+ znode = znode->parent;
+ if (!znode)
+ return NULL;
+ for (; n < znode->child_cnt; n++) {
+ struct ubifs_zbranch *zbr = &znode->zbranch[n];
+
+ if (zbr->znode && ubifs_zn_dirty(zbr->znode))
+ return find_first_dirty(zbr->znode);
+ }
+ return znode;
+}
+
+/**
+ * get_znodes_to_commit - create list of dirty znodes to commit.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns the number of znodes to commit.
+ */
+static int get_znodes_to_commit(struct ubifs_info *c)
+{
+ struct ubifs_znode *znode, *cnext;
+ int cnt = 0;
+
+ c->cnext = find_first_dirty(c->zroot.znode);
+ znode = c->enext = c->cnext;
+ if (!znode) {
+ dbg_cmt("no znodes to commit");
+ return 0;
+ }
+ cnt += 1;
+ while (1) {
+ ubifs_assert(!test_bit(COW_ZNODE, &znode->flags));
+ __set_bit(COW_ZNODE, &znode->flags);
+ znode->alt = 0;
+ cnext = find_next_dirty(znode);
+ if (!cnext) {
+ znode->cnext = c->cnext;
+ break;
+ }
+ znode->cnext = cnext;
+ znode = cnext;
+ cnt += 1;
+ }
+ dbg_cmt("committing %d znodes", cnt);
+ ubifs_assert(cnt == atomic_long_read(&c->dirty_zn_cnt));
+ return cnt;
+}
+
+/**
+ * alloc_idx_lebs - allocate empty LEBs to be used to commit.
+ * @c: UBIFS file-system description object
+ * @cnt: number of znodes to commit
+ *
+ * This function returns %-ENOSPC if it cannot allocate a sufficient number of
+ * empty LEBs. %0 is returned on success, otherwise a negative error code
+ * is returned.
+ */
+static int alloc_idx_lebs(struct ubifs_info *c, int cnt)
+{
+ int i, leb_cnt, lnum;
+
+ c->ileb_cnt = 0;
+ c->ileb_nxt = 0;
+ leb_cnt = get_leb_cnt(c, cnt);
+ dbg_cmt("need about %d empty LEBS for TNC commit", leb_cnt);
+ if (!leb_cnt)
+ return 0;
+ c->ilebs = kmalloc(leb_cnt * sizeof(int), GFP_NOFS);
+ if (!c->ilebs)
+ return -ENOMEM;
+ for (i = 0; i < leb_cnt; i++) {
+ lnum = ubifs_find_free_leb_for_idx(c);
+ if (lnum < 0)
+ return lnum;
+ c->ilebs[c->ileb_cnt++] = lnum;
+ dbg_cmt("LEB %d", lnum);
+ }
+ if (dbg_force_in_the_gaps())
+ return -ENOSPC;
+ return 0;
+}
+
+/**
+ * free_unused_idx_lebs - free unused LEBs that were allocated for the commit.
+ * @c: UBIFS file-system description object
+ *
+ * It is possible that we allocate more empty LEBs for the commit than we need.
+ * This functions frees the surplus.
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int free_unused_idx_lebs(struct ubifs_info *c)
+{
+ int i, err = 0, lnum, er;
+
+ for (i = c->ileb_nxt; i < c->ileb_cnt; i++) {
+ lnum = c->ilebs[i];
+ dbg_cmt("LEB %d", lnum);
+ er = ubifs_change_one_lp(c, lnum, LPROPS_NC, LPROPS_NC, 0,
+ LPROPS_INDEX | LPROPS_TAKEN, 0);
+ if (!err)
+ err = er;
+ }
+ return err;
+}
+
+/**
+ * free_idx_lebs - free unused LEBs after commit end.
+ * @c: UBIFS file-system description object
+ *
+ * This function returns %0 on success and a negative error code on failure.
+ */
+static int free_idx_lebs(struct ubifs_info *c)
+{
+ int err;
+
+ err = free_unused_idx_lebs(c);
+ kfree(c->ilebs);
+ c->ilebs = NULL;
+ return err;
+}
+
+/**
+ * ubifs_tnc_start_commit - start TNC commit.
+ * @c: UBIFS file-system description object
+ * @zroot: new index root position is returned here
+ *
+ * This function prepares the list of indexing nodes to commit and lays out
+ * their positions on flash. If there is not enough free space it uses the
+ * in-gap commit method. Returns zero in case of success and a negative error
+ * code in case of failure.
+ */
+int ubifs_tnc_start_commit(struct ubifs_info *c, struct ubifs_zbranch *zroot)
+{
+ int err = 0, cnt;
+
+ mutex_lock(&c->tnc_mutex);
+ err = dbg_check_tnc(c, 1);
+ if (err)
+ goto out;
+ cnt = get_znodes_to_commit(c);
+ if (cnt != 0) {
+ int no_space = 0;
+
+ err = alloc_idx_lebs(c, cnt);
+ if (err == -ENOSPC)
+ no_space = 1;
+ else if (err)
+ goto out_free;
+ err = layout_commit(c, no_space, cnt);
+ if (err)
+ goto out_free;
+ ubifs_assert(atomic_long_read(&c->dirty_zn_cnt) == 0);
+ err = free_unused_idx_lebs(c);
+ if (err)
+ goto out;
+ }
+ destroy_old_idx(c);
+ memcpy(zroot, &c->zroot, sizeof(struct ubifs_zbranch));
+
+ err = ubifs_save_dirty_idx_lnums(c);
+ if (err)
+ goto out;
+
+ spin_lock(&c->space_lock);
+ /*
+ * Although we have not finished committing yet, update size of the
+ * committed index ('c->old_idx_sz') and zero out the index growth
+ * budget. It is OK to do this now, because we've reserved all the
+ * space which is needed to commit the index, and it is save for the
+ * budgeting subsystem to assume the index is already committed,
+ * even though it is not.
+ */
+ c->old_idx_sz = c->calc_idx_sz;
+ c->budg_uncommitted_idx = 0;
+ spin_unlock(&c->space_lock);
+ mutex_unlock(&c->tnc_mutex);
+
+ dbg_cmt("number of index LEBs %d", c->lst.idx_lebs);
+ dbg_cmt("size of index %llu", c->calc_idx_sz);
+ return err;
+
+out_free:
+ free_idx_lebs(c);
+out:
+ mutex_unlock(&c->tnc_mutex);
+ return err;
+}
+
+/**
+ * write_index - write index nodes.
+ * @c: UBIFS file-system description object
+ *
+ * This function writes the index nodes whose positions were laid out in the
+ * layout_in_empty_space function.
+ */
+static int write_index(struct ubifs_info *c)
+{
+ struct ubifs_idx_node *idx;
+ struct ubifs_znode *znode, *cnext;
+ int i, lnum, offs, len, next_len, buf_len, buf_offs, used;
+ int avail, wlen, err, lnum_pos = 0;
+
+ cnext = c->enext;
+ if (!cnext)
+ return 0;
+
+ /*
+ * Always write index nodes to the index head so that index nodes and
+ * other types of nodes are never mixed in the same erase block.
+ */
+ lnum = c->ihead_lnum;
+ buf_offs = c->ihead_offs;
+
+ /* Allocate commit buffer */
+ buf_len = ALIGN(c->max_idx_node_sz, c->min_io_size);
+ used = 0;
+ avail = buf_len;
+
+ /* Ensure there is enough room for first write */
+ next_len = ubifs_idx_node_sz(c, cnext->child_cnt);
+ if (buf_offs + next_len > c->leb_size) {
+ err = ubifs_update_one_lp(c, lnum, LPROPS_NC, 0, 0,
+ LPROPS_TAKEN);
+ if (err)
+ return err;
+ lnum = -1;
+ }
+
+ while (1) {
+ cond_resched();
+
+ znode = cnext;
+ idx = c->cbuf + used;
+
+ /* Make index node */
+ idx->ch.node_type = UBIFS_IDX_NODE;
+ idx->child_cnt = cpu_to_le16(znode->child_cnt);
+ idx->level = cpu_to_le16(znode->level);
+ for (i = 0; i < znode->child_cnt; i++) {
+ struct ubifs_branch *br = ubifs_idx_branch(c, idx, i);
+ struct ubifs_zbranch *zbr = &znode->zbranch[i];
+
+ key_write_idx(c, &zbr->key, &br->key);
+ br->lnum = cpu_to_le32(zbr->lnum);
+ br->offs = cpu_to_le32(zbr->offs);
+ br->len = cpu_to_le32(zbr->len);
+ if (!zbr->lnum || !zbr->len) {
+ ubifs_err("bad ref in znode");
+ dbg_dump_znode(c, znode);
+ if (zbr->znode)
+ dbg_dump_znode(c, zbr->znode);
+ }
+ }
+ len = ubifs_idx_node_sz(c, znode->child_cnt);
+ ubifs_prepare_node(c, idx, len, 0);
+
+ /* Determine the index node position */
+ if (lnum == -1) {
+ lnum = c->ilebs[lnum_pos++];
+ buf_offs = 0;
+ used = 0;
+ avail = buf_len;
+ }
+ offs = buf_offs + used;
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+ if (lnum != znode->lnum || offs != znode->offs ||
+ len != znode->len) {
+ ubifs_err("inconsistent znode posn");
+ return -EINVAL;
+ }
+#endif
+
+ /* Grab some stuff from znode while we still can */
+ cnext = znode->cnext;
+
+ ubifs_assert(ubifs_zn_dirty(znode));
+ ubifs_assert(test_bit(COW_ZNODE, &znode->flags));
+
+ /*
+ * It is important that other threads should see %DIRTY_ZNODE
+ * flag cleared before %COW_ZNODE. Specifically, it matters in
+ * the 'dirty_cow_znode()' function. This is the reason for the
+ * first barrier. Also, we want the bit changes to be seen to
+ * other threads ASAP, to avoid unnecesarry copying, which is
+ * the reason for the second barrier.
+ */
+ clear_bit(DIRTY_ZNODE, &znode->flags);
+ smp_mb__before_clear_bit();
+ clear_bit(COW_ZNODE, &znode->flags);
+ smp_mb__after_clear_bit();
+
+ /* Do not access znode from this point on */
+
+ /* Update buffer positions */
+ wlen = used + len;
+ used += ALIGN(len, 8);
+ avail -= ALIGN(len, 8);
+
+ /*
+ * Calculate the next index node length to see if there is
+ * enough room for it
+ */
+ if (cnext == c->cnext)
+ next_len = 0;
+ else
+ next_len = ubifs_idx_node_sz(c, cnext->child_cnt);
+
+ if (c->min_io_size == 1) {
+ /*
+ * Write the prepared index node immediately if there is
+ * no minimum IO size
+ */
+ err = ubifs_leb_write(c, lnum, c->cbuf, buf_offs,
+ wlen, UBI_SHORTTERM);
+ if (err)
+ return err;
+ buf_offs += ALIGN(wlen, 8);
+ if (next_len) {
+ used = 0;
+ avail = buf_len;
+ if (buf_offs + next_len > c->leb_size) {
+ err = ubifs_update_one_lp(c, lnum,
+ LPROPS_NC, 0, 0, LPROPS_TAKEN);
+ if (err)
+ return err;
+ lnum = -1;
+ }
+ continue;
+ }
+ } else {
+ int blen, nxt_offs = buf_offs + used + next_len;
+
+ if (next_len && nxt_offs <= c->leb_size) {
+ if (avail > 0)
+ continue;
+ else
+ blen = buf_len;
+ } else {
+ wlen = ALIGN(wlen, 8);
+ blen = ALIGN(wlen, c->min_io_size);
+ ubifs_pad(c, c->cbuf + wlen, blen - wlen);
+ }
+ /*
+ * The buffer is full or there are no more znodes
+ * to do
+ */
+ err = ubifs_leb_write(c, lnum, c->cbuf, buf_offs,
+ blen, UBI_SHORTTERM);
+ if (err)
+ return err;
+ buf_offs += blen;
+ if (next_len) {
+ if (nxt_offs > c->leb_size) {
+ err = ubifs_update_one_lp(c, lnum,
+ LPROPS_NC, 0, 0, LPROPS_TAKEN);
+ if (err)
+ return err;
+ lnum = -1;
+ }
+ used -= blen;
+ if (used < 0)
+ used = 0;
+ avail = buf_len - used;
+ memmove(c->cbuf, c->cbuf + blen, used);
+ continue;
+ }
+ }
+ break;
+ }
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+ if (lnum != c->new_ihead_lnum || buf_offs != c->new_ihead_offs) {
+ ubifs_err("inconsistent ihead");
+ return -EINVAL;
+ }
+#endif
+
+ c->ihead_lnum = lnum;
+ c->ihead_offs = buf_offs;
+
+ return 0;
+}
+
+/**
+ * free_obsolete_znodes - free obsolete znodes.
+ * @c: UBIFS file-system description object
+ *
+ * At the end of commit end, obsolete znodes are freed.
+ */
+static void free_obsolete_znodes(struct ubifs_info *c)
+{
+ struct ubifs_znode *znode, *cnext;
+
+ cnext = c->cnext;
+ do {
+ znode = cnext;
+ cnext = znode->cnext;
+ if (test_bit(OBSOLETE_ZNODE, &znode->flags))
+ kfree(znode);
+ else {
+ znode->cnext = NULL;
+ atomic_long_inc(&c->clean_zn_cnt);
+ atomic_long_inc(&ubifs_clean_zn_cnt);
+ }
+ } while (cnext != c->cnext);
+}
+
+/**
+ * return_gap_lebs - return LEBs used by the in-gap commit method.
+ * @c: UBIFS file-system description object
+ *
+ * This function clears the "taken" flag for the LEBs which were used by the
+ * "commit in-the-gaps" method.
+ */
+static int return_gap_lebs(struct ubifs_info *c)
+{
+ int *p, err;
+
+ if (!c->gap_lebs)
+ return 0;
+
+ dbg_cmt("");
+ for (p = c->gap_lebs; *p != -1; p++) {
+ err = ubifs_change_one_lp(c, *p, LPROPS_NC, LPROPS_NC, 0,
+ LPROPS_TAKEN, 0);
+ if (err)
+ return err;
+ }
+
+ kfree(c->gap_lebs);
+ c->gap_lebs = NULL;
+ return 0;
+}
+
+/**
+ * ubifs_tnc_end_commit - update the TNC for commit end.
+ * @c: UBIFS file-system description object
+ *
+ * Write the dirty znodes.
+ */
+int ubifs_tnc_end_commit(struct ubifs_info *c)
+{
+ int err;
+
+ if (!c->cnext)
+ return 0;
+
+ err = return_gap_lebs(c);
+ if (err)
+ return err;
+
+ err = write_index(c);
+ if (err)
+ return err;
+
+ mutex_lock(&c->tnc_mutex);
+
+ dbg_cmt("TNC height is %d", c->zroot.znode->level + 1);
+
+ free_obsolete_znodes(c);
+
+ c->cnext = NULL;
+ kfree(c->ilebs);
+ c->ilebs = NULL;
+
+ mutex_unlock(&c->tnc_mutex);
+
+ return 0;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/tnc_misc.c avr32-2.6/fs/ubifs/tnc_misc.c
--- linux-2.6.25.6/fs/ubifs/tnc_misc.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/tnc_misc.c 2008-06-12 15:09:45.603817614 +0200
@@ -0,0 +1,496 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Adrian Hunter
+ * Artem Bityutskiy (Битюцкий Артём)
+ */
+
+/*
+ * This file contains miscelanious TNC-related functions shared betweend
+ * different files. This file does not form any logically separate TNC
+ * sub-system. The file was created because there is a lot of TNC code and
+ * putting it all in one file would make that file too big and unreadable.
+ */
+
+#include "ubifs.h"
+
+/**
+ * ubifs_tnc_levelorder_next - next TNC tree element in levelorder traversal.
+ * @zr: root of the subtree to traverse
+ * @znode: previous znode
+ *
+ * This function implements levelorder TNC traversal. The LNC is ignored.
+ * Returns the next element or %NULL if @znode is already the last one.
+ */
+struct ubifs_znode *ubifs_tnc_levelorder_next(struct ubifs_znode *zr,
+ struct ubifs_znode *znode)
+{
+ int level, iip, level_search = 0;
+ struct ubifs_znode *zn;
+
+ ubifs_assert(zr);
+
+ if (unlikely(!znode))
+ return zr;
+
+ if (unlikely(znode == zr)) {
+ if (znode->level == 0)
+ return NULL;
+ return ubifs_tnc_find_child(zr, 0);
+ }
+
+ level = znode->level;
+
+ iip = znode->iip;
+ while (1) {
+ ubifs_assert(znode->level <= zr->level);
+
+ /*
+ * First walk up until there is a znode with next branch to
+ * look at.
+ */
+ while (znode->parent != zr && iip >= znode->parent->child_cnt) {
+ znode = znode->parent;
+ iip = znode->iip;
+ }
+
+ if (unlikely(znode->parent == zr &&
+ iip >= znode->parent->child_cnt)) {
+ /* This level is done, switch to the lower one */
+ level -= 1;
+ if (level_search || level < 0)
+ /*
+ * We were already looking for znode at lower
+ * level ('level_search'). As we are here
+ * again, it just does not exist. Or all levels
+ * were finished ('level < 0').
+ */
+ return NULL;
+
+ level_search = 1;
+ iip = -1;
+ znode = ubifs_tnc_find_child(zr, 0);
+ ubifs_assert(znode);
+ }
+
+ /* Switch to the next index */
+ zn = ubifs_tnc_find_child(znode->parent, iip + 1);
+ if (!zn) {
+ /* No more children to look at, we have walk up */
+ iip = znode->parent->child_cnt;
+ continue;
+ }
+
+ /* Walk back down to the level we came from ('level') */
+ while (zn->level != level) {
+ znode = zn;
+ zn = ubifs_tnc_find_child(zn, 0);
+ if (!zn) {
+ /*
+ * This path is not too deep so it does not
+ * reach 'level'. Try next path.
+ */
+ iip = znode->iip;
+ break;
+ }
+ }
+
+ if (zn) {
+ ubifs_assert(zn->level >= 0);
+ return zn;
+ }
+ }
+}
+
+/**
+ * ubifs_search_zbranch - search znode branch.
+ * @c: UBIFS file-system description object
+ * @znode: znode to search in
+ * @key: key to search for
+ * @n: znode branch slot number is returned here
+ *
+ * This is a helper function which search branch with key @key in @znode using
+ * binary search. The result of the search may be:
+ * o exact match, then %1 is returned, and the slot number of the branch is
+ * stored in @n;
+ * o no exact match, then %0 is returned and the slot number of the left
+ * closest branch is returned in @n; the slot if all keys in this znode are
+ * greater than @key, then %-1 is returned in @n.
+ */
+int ubifs_search_zbranch(const struct ubifs_info *c,
+ const struct ubifs_znode *znode,
+ const union ubifs_key *key, int *n)
+{
+ int beg = 0, end = znode->child_cnt, uninitialized_var(mid);
+ int uninitialized_var(cmp);
+ const struct ubifs_zbranch *zbr = &znode->zbranch[0];
+
+ ubifs_assert(end > beg);
+
+ while (end > beg) {
+ mid = (beg + end) >> 1;
+ cmp = keys_cmp(c, key, &zbr[mid].key);
+ if (cmp > 0)
+ beg = mid + 1;
+ else if (cmp < 0)
+ end = mid;
+ else {
+ *n = mid;
+ return 1;
+ }
+ }
+
+ *n = end - 1;
+
+ /* The insert point is after *n */
+ ubifs_assert(*n >= -1 && *n < znode->child_cnt);
+ if (*n == -1)
+ ubifs_assert(keys_cmp(c, key, &zbr[0].key) < 0);
+ else
+ ubifs_assert(keys_cmp(c, key, &zbr[*n].key) > 0);
+ if (*n + 1 < znode->child_cnt)
+ ubifs_assert(keys_cmp(c, key, &zbr[*n + 1].key) < 0);
+
+ return 0;
+}
+
+/**
+ * ubifs_tnc_postorder_first - find first znode to do postorder tree traversal.
+ * @znode: znode to start at (root of the sub-tree to traverse)
+ *
+ * Find the lowest leftmost znode in a subtree of the TNC tree. The LNC is
+ * ignored.
+ */
+struct ubifs_znode *ubifs_tnc_postorder_first(struct ubifs_znode *znode)
+{
+ if (unlikely(!znode))
+ return NULL;
+
+ while (znode->level > 0) {
+ struct ubifs_znode *child;
+
+ child = ubifs_tnc_find_child(znode, 0);
+ if (!child)
+ return znode;
+ znode = child;
+ }
+
+ return znode;
+}
+
+/**
+ * ubifs_tnc_postorder_next - next TNC tree element in postorder traversal.
+ * @znode: previous znode
+ *
+ * This function implements postorder TNC traversal. The LNC is ignored.
+ * Returns the next element or %NULL if @znode is already the last one.
+ */
+struct ubifs_znode *ubifs_tnc_postorder_next(struct ubifs_znode *znode)
+{
+ struct ubifs_znode *zn;
+
+ ubifs_assert(znode);
+ if (unlikely(!znode->parent))
+ return NULL;
+
+ /* Switch to the next index in the parent */
+ zn = ubifs_tnc_find_child(znode->parent, znode->iip + 1);
+ if (!zn)
+ /* This is in fact the last child, return parent */
+ return znode->parent;
+
+ /* Go to the first znode in this new subtree */
+ return ubifs_tnc_postorder_first(zn);
+}
+
+/**
+ * ubifs_destroy_tnc_subtree - destroy all znodes connected to a subtree.
+ * @znode: znode defining subtree to destroy
+ *
+ * This function destroys subtree of the TNC tree. Returns number of clean
+ * znodes in the subtree.
+ */
+long ubifs_destroy_tnc_subtree(struct ubifs_znode *znode)
+{
+ struct ubifs_znode *zn = ubifs_tnc_postorder_first(znode);
+ long clean_freed = 0;
+ int n;
+
+ ubifs_assert(zn);
+ while (1) {
+ for (n = 0; n < zn->child_cnt; n++) {
+ if (!zn->zbranch[n].znode)
+ continue;
+
+ if (zn->level > 0 &&
+ !ubifs_zn_dirty(zn->zbranch[n].znode))
+ clean_freed += 1;
+
+ cond_resched();
+ kfree(zn->zbranch[n].znode);
+ }
+
+ if (zn == znode) {
+ if (!ubifs_zn_dirty(zn))
+ clean_freed += 1;
+ kfree(zn);
+ return clean_freed;
+ }
+
+ zn = ubifs_tnc_postorder_next(zn);
+ }
+}
+
+/**
+ * read_znode - read an indexing node from flash and fill znode.
+ * @c: UBIFS file-system description object
+ * @lnum: LEB of the indexing node to read
+ * @offs: node offset
+ * @len: node length
+ * @znode: znode to read to
+ *
+ * This function reads an indexing node from the flash media and fills znode
+ * with the read data. Returns zero in case of success and a negative error
+ * code in case of failure. The read indexing node is validated and if anything
+ * is wrong with it, this function prints complaint messages and returns
+ * %-EINVAL.
+ */
+static int read_znode(struct ubifs_info *c, int lnum, int offs, int len,
+ struct ubifs_znode *znode)
+{
+ int i, err, type, cmp;
+ struct ubifs_idx_node *idx;
+
+ idx = kmalloc(c->max_idx_node_sz, GFP_NOFS);
+ if (!idx)
+ return -ENOMEM;
+
+ err = ubifs_read_node(c, idx, UBIFS_IDX_NODE, len, lnum, offs);
+ if (err < 0) {
+ kfree(idx);
+ return err;
+ }
+
+ znode->child_cnt = le16_to_cpu(idx->child_cnt);
+ znode->level = le16_to_cpu(idx->level);
+
+ dbg_tnc("LEB %d:%d, level %d, %d branch",
+ lnum, offs, znode->level, znode->child_cnt);
+
+ if (znode->child_cnt > c->fanout || znode->level > UBIFS_MAX_LEVELS) {
+ dbg_err("current fanout %d, branch count %d",
+ c->fanout, znode->child_cnt);
+ dbg_err("max levels %d, znode level %d",
+ UBIFS_MAX_LEVELS, znode->level);
+ err = 1;
+ goto out_dump;
+ }
+
+ for (i = 0; i < znode->child_cnt; i++) {
+ const struct ubifs_branch *br = ubifs_idx_branch(c, idx, i);
+ struct ubifs_zbranch *zbr = &znode->zbranch[i];
+
+ key_read(c, &br->key, &zbr->key);
+ zbr->lnum = le32_to_cpu(br->lnum);
+ zbr->offs = le32_to_cpu(br->offs);
+ zbr->len = le32_to_cpu(br->len);
+ zbr->znode = NULL;
+
+ /* Validate branch */
+
+ if (zbr->lnum < c->main_first ||
+ zbr->lnum >= c->leb_cnt || zbr->offs < 0 ||
+ zbr->offs + zbr->len > c->leb_size || zbr->offs & 7) {
+ dbg_err("bad branch %d", i);
+ err = 2;
+ goto out_dump;
+ }
+
+ switch (key_type(c, &zbr->key)) {
+ case UBIFS_INO_KEY:
+ case UBIFS_DATA_KEY:
+ case UBIFS_DENT_KEY:
+ case UBIFS_XENT_KEY:
+ break;
+ default:
+ dbg_msg("bad key type at slot %d: %s", i,
+ DBGKEY(&zbr->key));
+ err = 3;
+ goto out_dump;
+ }
+
+ if (znode->level)
+ continue;
+
+ type = key_type(c, &zbr->key);
+ if (c->ranges[type].max_len == 0) {
+ if (zbr->len != c->ranges[type].len) {
+ dbg_err("bad target node (type %d) length (%d)",
+ type, zbr->len);
+ dbg_err("have to be %d", c->ranges[type].len);
+ err = 4;
+ goto out_dump;
+ }
+ } else if (zbr->len < c->ranges[type].min_len ||
+ zbr->len > c->ranges[type].max_len) {
+ dbg_err("bad target node (type %d) length (%d)",
+ type, zbr->len);
+ dbg_err("have to be in range of %d-%d",
+ c->ranges[type].min_len,
+ c->ranges[type].max_len);
+ err = 5;
+ goto out_dump;
+ }
+ }
+
+ /*
+ * Ensure that the next key is greater or equivalent to the
+ * previous one.
+ */
+ for (i = 0; i < znode->child_cnt - 1; i++) {
+ const union ubifs_key *key1, *key2;
+
+ key1 = &znode->zbranch[i].key;
+ key2 = &znode->zbranch[i + 1].key;
+
+ cmp = keys_cmp(c, key1, key2);
+ if (cmp > 0) {
+ dbg_err("bad key order (keys %d and %d)", i, i + 1);
+ err = 6;
+ goto out_dump;
+ } else if (cmp == 0 && !is_hash_key(c, key1)) {
+ /* These can only be keys with colliding hash */
+ dbg_err("keys %d and %d are not hashed but equivalent",
+ i, i + 1);
+ err = 7;
+ goto out_dump;
+ }
+ }
+
+ kfree(idx);
+ return 0;
+
+out_dump:
+ ubifs_err("bad indexing node at LEB %d:%d, error %d", lnum, offs, err);
+ dbg_dump_node(c, idx);
+ kfree(idx);
+ return -EINVAL;
+}
+
+/**
+ * ubifs_load_znode - load znode to TNC cache.
+ * @c: UBIFS file-system description object
+ * @zbr: znode branch
+ * @parent: znode's parent
+ * @iip: index in parent
+ *
+ * This function loads znode pointed to by @zbr into the TNC cache and
+ * returns pointer to it in case of success and a negative error code in case
+ * of failure.
+ */
+struct ubifs_znode *ubifs_load_znode(struct ubifs_info *c,
+ struct ubifs_zbranch *zbr,
+ struct ubifs_znode *parent, int iip)
+{
+ int err;
+ struct ubifs_znode *znode;
+
+ ubifs_assert(!zbr->znode);
+ /*
+ * A slab cache is not presently used for znodes because the znode size
+ * depends on the fanout which is stored in the superblock.
+ */
+ znode = kzalloc(c->max_znode_sz, GFP_NOFS);
+ if (!znode)
+ return ERR_PTR(-ENOMEM);
+
+ err = read_znode(c, zbr->lnum, zbr->offs, zbr->len, znode);
+ if (err)
+ goto out;
+
+ atomic_long_inc(&c->clean_zn_cnt);
+
+ /*
+ * Increment the global clean znode counter as well. It is OK that
+ * global and per-FS clean znode counters may be inconsistent for some
+ * short time (because we might be preempted at this point), the global
+ * one is only used in shrinker.
+ */
+ atomic_long_inc(&ubifs_clean_zn_cnt);
+
+ zbr->znode = znode;
+ znode->parent = parent;
+ znode->time = get_seconds();
+ znode->iip = iip;
+
+ return znode;
+
+out:
+ kfree(znode);
+ return ERR_PTR(err);
+}
+
+/**
+ * ubifs_tnc_read_node - read a leaf node from the flash media.
+ * @c: UBIFS file-system description object
+ * @zbr: key and position of the node
+ * @node: node is returned here
+ *
+ * This function reads a node defined by @zbr from the flash media. Returns
+ * zero in case of success or a negative negative error code in case of
+ * failure.
+ */
+int ubifs_tnc_read_node(struct ubifs_info *c, struct ubifs_zbranch *zbr,
+ void *node)
+{
+ union ubifs_key key1, *key = &zbr->key;
+ int err, type = key_type(c, key);
+ struct ubifs_wbuf *wbuf;
+
+ ubifs_assert(!zbr->leaf);
+
+ /*
+ * 'zbr' has to point to on-flash node. The node may sit in a bud and
+ * may even be in a write buffer, so we have to take care about this.
+ */
+ wbuf = ubifs_get_wbuf(c, zbr->lnum);
+ if (wbuf)
+ err = ubifs_read_node_wbuf(wbuf, node, type, zbr->len,
+ zbr->lnum, zbr->offs);
+ else
+ err = ubifs_read_node(c, node, type, zbr->len, zbr->lnum,
+ zbr->offs);
+
+ if (err) {
+ dbg_tnc("key %s", DBGKEY(key));
+ return err;
+ }
+
+ /* Make sure the key of the read node is correct */
+ key_read(c, key, &key1);
+ if (memcmp(node + UBIFS_KEY_OFFSET, &key1, c->key_len)) {
+ ubifs_err("bad key in node at LEB %d:%d",
+ zbr->lnum, zbr->offs);
+ dbg_tnc("looked for key %s found node's key %s",
+ DBGKEY(key), DBGKEY1(&key1));
+ dbg_dump_node(c, node);
+ return -EINVAL;
+ }
+
+ return 0;
+}
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/ubifs.h avr32-2.6/fs/ubifs/ubifs.h
--- linux-2.6.25.6/fs/ubifs/ubifs.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/ubifs.h 2008-06-12 15:09:45.603817614 +0200
@@ -0,0 +1,1605 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/* Implementation version 0.7 */
+
+#ifndef __UBIFS_H__
+#define __UBIFS_H__
+
+#include <asm/div64.h>
+#include <linux/statfs.h>
+#include <linux/fs.h>
+#include <linux/err.h>
+#include <linux/sched.h>
+#include <linux/vmalloc.h>
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+#include <linux/rwsem.h>
+#include <linux/mtd/ubi.h>
+#include <linux/pagemap.h>
+#include <linux/backing-dev.h>
+#include "ubifs-media.h"
+
+/* Version of this UBIFS implementation */
+#define UBIFS_VERSION 1
+
+/* Normal UBIFS messages */
+#define ubifs_msg(fmt, ...) \
+ printk(KERN_NOTICE "UBIFS: " fmt "\n", ##__VA_ARGS__)
+/* UBIFS error messages */
+#define ubifs_err(fmt, ...) \
+ printk(KERN_ERR "UBIFS error (pid %d): %s: " fmt "\n", current->pid, \
+ __func__, ##__VA_ARGS__)
+/* UBIFS warning messages */
+#define ubifs_warn(fmt, ...) \
+ printk(KERN_WARNING "UBIFS warning (pid %d): %s: " fmt "\n", \
+ current->pid, __func__, ##__VA_ARGS__)
+
+/* UBIFS file system VFS magic number */
+#define UBIFS_SUPER_MAGIC 0x24051905
+
+/* Number of UBIFS blocks per VFS page */
+#define UBIFS_BLOCKS_PER_PAGE (PAGE_CACHE_SIZE / UBIFS_BLOCK_SIZE)
+#define UBIFS_BLOCKS_PER_PAGE_SHIFT (PAGE_CACHE_SHIFT - UBIFS_BLOCK_SHIFT)
+
+/* "File system end of life" sequence number watermark */
+#define SQNUM_WARN_WATERMARK 0xFFFFFFFF00000000ULL
+#define SQNUM_WATERMARK 0xFFFFFFFFFF000000ULL
+
+/* Minimum amount of data UBIFS writes to the flash */
+#define MIN_WRITE_SZ (UBIFS_DATA_NODE_SZ + 8)
+
+/*
+ * Currently we do not support inode number overlapping and re-using, so this
+ * watermark defines dangerous inode number level. This should be fixed later,
+ * although it is difficult to exceed current limit. Another option is to use
+ * 64-bit inode numbers, but this means more overhead.
+ */
+#define INUM_WARN_WATERMARK 0xFFF00000
+#define INUM_WATERMARK 0xFFFFFF00
+
+/* Largest key size supported in this implementation */
+#define CUR_MAX_KEY_LEN UBIFS_SK_LEN
+
+/* Maximum number of entries in each LPT (LEB category) heap */
+#define LPT_HEAP_SZ 256
+
+/*
+ * Background thread name pattern. The numbers are UBI device and volume
+ * numbers.
+ */
+#define BGT_NAME_PATTERN "ubifs_bgt%d_%d"
+
+/* Default write-buffer synchronization timeout (5 secs) */
+#define DEFAULT_WBUF_TIMEOUT (5 * HZ)
+
+/* Maximum possible inode number (only 32-bit inodes are supported now) */
+#define MAX_INUM 0xFFFFFFFF
+
+/* Number of non-data journal heads */
+#define NONDATA_JHEADS_CNT 2
+
+/* Garbage collector head */
+#define GCHD 0
+/* Base journal head number */
+#define BASEHD 1
+/* First "general purpose" journal head */
+#define DATAHD 2
+
+/* 'No change' value for 'ubifs_change_lp()' */
+#define LPROPS_NC 0x80000001
+
+/*
+ * There is no notion of truncation key because truncation nodes do not exist
+ * in TNC. However, when replaying, it is handy to introduce fake "truncation"
+ * keys for truncation nodes because the code becomes simpler. So we define
+ * %UBIFS_TRUN_KEY type.
+ */
+#define UBIFS_TRUN_KEY UBIFS_KEY_TYPES_CNT
+
+/*
+ * How much a directory entry/extended attribute entry adds to the parent/host
+ * inode.
+ */
+#define CALC_DENT_SIZE(name_len) ALIGN(UBIFS_DENT_NODE_SZ + (name_len) + 1, 8)
+
+/* How much an extended attribute adds to the host inode */
+#define CALC_XATTR_BYTES(data_len) ALIGN(UBIFS_INO_NODE_SZ + (data_len) + 1, 8)
+
+/*
+ * Znodes which were not touched for 'OLD_ZNODE_AGE' seconds are considered
+ * "old", and znode which were touched last 'YOUNG_ZNODE_AGE' seconds ago are
+ * considered "young". This is used by shrinker when selecting znode to trim
+ * off.
+ */
+#define OLD_ZNODE_AGE 20
+#define YOUNG_ZNODE_AGE 5
+
+/*
+ * Some compressors, like LZO, may end up with more data then the input buffer.
+ * So UBIFS always allocates larger output buffer, to be sure the compressor
+ * will not corrupt memory in case of worst case compression.
+ */
+#define WORST_COMPR_FACTOR 2
+
+/* Maximum expected tree height for use by bottom_up_buf */
+#define BOTTOM_UP_HEIGHT 64
+
+/*
+ * Znode flags (actually, bit numbers which store the flags).
+ *
+ * DIRTY_ZNODE: znode is dirty
+ * COW_ZNODE: znode is being committed and a new instance of this znode has to
+ * be created before changing this znode
+ * OBSOLETE_ZNODE: znode is obsolete, which means it was deleted, but it is
+ * still in the commit list and the ongoing commit operation
+ * will commit it, and delete this znode after it is done
+ */
+enum {
+ DIRTY_ZNODE = 0,
+ COW_ZNODE = 1,
+ OBSOLETE_ZNODE = 2
+};
+
+/*
+ * Commit states.
+ *
+ * COMMIT_RESTING: commit is not wanted
+ * COMMIT_BACKGROUND: background commit has been requested
+ * COMMIT_REQUIRED: commit is required
+ * COMMIT_RUNNING_BACKGROUND: background commit is running
+ * COMMIT_RUNNING_REQUIRED: commit is running and it is required
+ * COMMIT_BROKEN: commit failed
+ */
+enum {
+ COMMIT_RESTING = 0,
+ COMMIT_BACKGROUND,
+ COMMIT_REQUIRED,
+ COMMIT_RUNNING_BACKGROUND,
+ COMMIT_RUNNING_REQUIRED,
+ COMMIT_BROKEN,
+};
+
+/*
+ * 'ubifs_scan_a_node()' return values.
+ *
+ * SCANNED_GARBAGE: scanned garbage
+ * SCANNED_EMPTY_SPACE: scanned empty space
+ * SCANNED_A_NODE: scanned a valid node
+ * SCANNED_A_CORRUPT_NODE: scanned a corrupted node
+ * SCANNED_A_BAD_PAD_NODE: scanned a padding node with invalid pad length
+ *
+ * Greater than zero means: 'scanned that number of padding bytes'
+ */
+enum {
+ SCANNED_GARBAGE = 0,
+ SCANNED_EMPTY_SPACE = -1,
+ SCANNED_A_NODE = -2,
+ SCANNED_A_CORRUPT_NODE = -3,
+ SCANNED_A_BAD_PAD_NODE = -4,
+};
+
+/*
+ * LPT cnode flag bits.
+ *
+ * DIRTY_CNODE: cnode is dirty
+ * COW_CNODE: cnode is being committed and must be copied before writing
+ * OBSOLETE_CNODE: cnode is being committed and has been copied (or deleted),
+ * so it can (and must) be freed when the commit is finished
+ */
+enum {
+ DIRTY_CNODE = 0,
+ COW_CNODE = 1,
+ OBSOLETE_CNODE = 2,
+};
+
+/*
+ * Dirty flag bits (lpt_drty_flgs) for LPT special nodes.
+ *
+ * LTAB_DIRTY: ltab node is dirty
+ * LSAVE_DIRTY: lsave node is dirty
+ */
+enum {
+ LTAB_DIRTY = 1,
+ LSAVE_DIRTY = 2,
+};
+
+/*
+ * Return codes used by the garbage collector.
+ * @LEB_FREED: the logical eraseblock was freed and is ready to use
+ * @LEB_FREED_IDX: indexing LEB was freed and can be used only after the commit
+ * @LEB_RETAINED: the logical eraseblock was freed and retained for GC purposes
+ */
+enum {
+ LEB_FREED,
+ LEB_FREED_IDX,
+ LEB_RETAINED,
+};
+
+/**
+ * struct ubifs_old_idx - index node obsoleted since last commit start.
+ * @rb: rb-tree node
+ * @lnum: LEB number of obsoleted index node
+ * @offs: offset of obsoleted index node
+ */
+struct ubifs_old_idx {
+ struct rb_node rb;
+ int lnum;
+ int offs;
+};
+
+/* The below union makes it easier to deal with keys */
+union ubifs_key {
+ uint8_t u8[CUR_MAX_KEY_LEN];
+ uint32_t u32[CUR_MAX_KEY_LEN/4];
+ uint64_t u64[CUR_MAX_KEY_LEN/8];
+ __le32 j32[CUR_MAX_KEY_LEN/4];
+};
+
+/**
+ * struct ubifs_scan_node - UBIFS scanned node information.
+ * @list: list of scanned nodes
+ * @key: key of node scanned (if it has one)
+ * @sqnum: sequence number
+ * @type: type of node scanned
+ * @offs: offset with LEB of node scanned
+ * @len: length of node scanned
+ * @node: raw node
+ */
+struct ubifs_scan_node {
+ struct list_head list;
+ union ubifs_key key;
+ unsigned long long sqnum;
+ int type;
+ int offs;
+ int len;
+ void *node;
+};
+
+/**
+ * struct ubifs_scan_leb - UBIFS scanned LEB information.
+ * @lnum: logical eraseblock number
+ * @nodes_cnt: number of nodes scanned
+ * @nodes: list of struct ubifs_scan_node
+ * @endpt: end point (and therefore the start of empty space)
+ * @ecc: read returned -EBADMSG
+ * @buf: buffer containing entire LEB scanned
+ */
+struct ubifs_scan_leb {
+ int lnum;
+ int nodes_cnt;
+ struct list_head nodes;
+ int endpt;
+ int ecc;
+ void *buf;
+};
+
+/**
+ * struct ubifs_gced_idx_leb - garbage-collected indexing LEB.
+ * @list: list
+ * @lnum: LEB number
+ * @unmap: OK to unmap this LEB
+ *
+ * This data structure is used to temporary store garbage-collected indexing
+ * LEBs - they are not released immediately, but only after the next commit.
+ * This is needed to guarantee recoverability.
+ */
+struct ubifs_gced_idx_leb {
+ struct list_head list;
+ int lnum;
+ int unmap;
+};
+
+/**
+ * struct ubifs_inode - UBIFS in-memory inode description.
+ * @vfs_inode: VFS inode description object
+ * @creat_sqnum: sequence number at time of creation
+ * @xattr_size: summarized size of all extended attributes in bytes, protected
+ * by @inode->i_lock
+ * @xattr_cnt: count of extended attributes this inode has
+ * @xattr_names: sum of lengths of all extended attribute names belonging to
+ * this inode
+ * @dirty: non-zero if the inode is dirty
+ * @xattr: non-zero if this is an extended attribute inode
+ * @budgeted: non-zero if the inode has been budgeted (used for debugging)
+ * @budg_mutex: serializes inode budgeting and write-back
+ * @flags: inode flags (@UBIFS_COMPR_FL, etc)
+ * @compr_type: default compression type used for this inode
+ * @data_len: length of the data attached to the inode
+ * @data: inode's data
+ *
+ * UBIFS has its own inode mutex, besides the VFS 'i_mutex'. The reason for
+ * this is budgeting - UBIFS has to budget each operation. So, if an operation
+ * is going to mark an inode dirty, it has to allocate budget for this. It
+ * cannot just mark it dirty because there is no guarantee there will be enough
+ * flash space when it is time to write the inode back. This means that UBIFS
+ * has to have full control over "clean <-> dirty" transitions of inodes (and
+ * pages actually, but it is easy for pages, because we have
+ * 'ubifs_prepare_write()' which is called _before_ every page change). But
+ * unfortunately, VFS marks inodes dirty in many places, and it does not ask
+ * the file-system if it is allowed to do so (there is a notifier, but it is
+ * not enough), i.e., there is no mechanism to synchronize with this. So we
+ * introduce our own dirty flag to UBIFS inodes and our own inode mutex to
+ * serialize "clean <-> dirty" transitions.
+ */
+struct ubifs_inode {
+ struct inode vfs_inode;
+ unsigned long long creat_sqnum;
+ long long xattr_size;
+ int xattr_cnt;
+ int xattr_names;
+ unsigned int dirty:1;
+ unsigned int xattr:1;
+#ifdef CONFIG_UBIFS_FS_DEBUG
+ unsigned int budgeted:1;
+#endif
+ struct mutex budg_mutex;
+ int flags;
+ int compr_type;
+ int data_len;
+ void *data;
+};
+
+/**
+ * struct ubifs_unclean_leb - records a LEB recovered under read-only mode.
+ * @list: list
+ * @lnum: LEB number of recovered LEB
+ * @endpt: offset where recovery ended
+ *
+ * This structure records a LEB identified during recovery that needs to be
+ * cleaned but was not because UBIFS was mounted read-only. The information
+ * is used to clean the LEB when remounting to read-write mode.
+ */
+struct ubifs_unclean_leb {
+ struct list_head list;
+ int lnum;
+ int endpt;
+};
+
+/*
+ * LEB properties flags.
+ *
+ * LPROPS_UNCAT: not categorized
+ * LPROPS_DIRTY: dirty > 0, not index
+ * LPROPS_DIRTY_IDX: dirty + free > UBIFS_CH_SZ and index
+ * LPROPS_FREE: free > 0, not empty, not index
+ * LPROPS_HEAP_CNT: number of heaps used for storing categorized LEBs
+ * LPROPS_EMPTY: LEB is empty, not taken
+ * LPROPS_FREEABLE: free + dirty == leb_size, not index, not taken
+ * LPROPS_FRDI_IDX: free + dirty == leb_size and index, may be taken
+ * LPROPS_CAT_MASK: mask for the LEB categories above
+ * LPROPS_TAKEN: LEB was taken (this flag is not saved on the media)
+ * LPROPS_INDEX: LEB contains indexing nodes (this flag also exists on flash)
+ */
+enum {
+ LPROPS_UNCAT = 0,
+ LPROPS_DIRTY = 1,
+ LPROPS_DIRTY_IDX = 2,
+ LPROPS_FREE = 3,
+ LPROPS_HEAP_CNT = 3,
+ LPROPS_EMPTY = 4,
+ LPROPS_FREEABLE = 5,
+ LPROPS_FRDI_IDX = 6,
+ LPROPS_CAT_MASK = 15,
+ LPROPS_TAKEN = 16,
+ LPROPS_INDEX = 32,
+};
+
+/**
+ * struct ubifs_lprops - logical eraseblock properties.
+ * @free: amount of free space in bytes
+ * @dirty: amount of dirty space in bytes
+ * @flags: LEB properties flags (see above)
+ * @lnum: LEB number
+ * @list: list of same-category lprops (for LPROPS_EMPTY and LPROPS_FREEABLE)
+ * @hpos: heap position in heap of same-category lprops (other categories)
+ */
+struct ubifs_lprops {
+ int free;
+ int dirty;
+ int flags;
+ int lnum;
+ union {
+ struct list_head list;
+ int hpos;
+ };
+};
+
+/**
+ * struct ubifs_lpt_lprops - LPT logical eraseblock properties.
+ * @free: amount of free space in bytes
+ * @dirty: amount of dirty space in bytes
+ * @tgc: trivial GC flag (1 => unmap after commit end)
+ * @cmt: commit flag (1 => reserved for commit)
+ */
+struct ubifs_lpt_lprops {
+ int free;
+ int dirty;
+ unsigned tgc : 1;
+ unsigned cmt : 1;
+};
+
+/**
+ * struct ubifs_lp_stats - statistics of eraseblocks in the main area.
+ * @empty_lebs: number of empty LEBs
+ * @taken_empty_lebs: number of taken LEBs
+ * @idx_lebs: number of indexing LEBs
+ * @total_free: total free space in bytes
+ * @total_dirty: total dirty space in bytes
+ * @total_used: total used space in bytes (includes only data LEBs)
+ * @total_dead: total dead space in bytes (includes only data LEBs)
+ * @total_dark: total dark space in bytes (includes only data LEBs)
+ *
+ * N.B. total_dirty and total_used are different to other total_* fields,
+ * because they account _all_ LEBs, not just data LEBs.
+ *
+ * 'taken_empty_lebs' counts the LEBs that are in the transient state of having
+ * been 'taken' for use but not yet written to. 'taken_empty_lebs' is needed
+ * to account correctly for gc_lnum, otherwise 'empty_lebs' could be used
+ * by itself (in which case 'unused_lebs' would be a better name). In the case
+ * of gc_lnum, it is 'taken' at mount time or whenever a LEB is retained by GC,
+ * but unlike other empty LEBs that are 'taken', it may not be written straight
+ * away (i.e. before the next commit start or unmount), so either gc_lnum must
+ * be specially accounted for, or the current approach followed i.e. count it
+ * under 'taken_empty_lebs'.
+ */
+struct ubifs_lp_stats {
+ int empty_lebs;
+ int taken_empty_lebs;
+ int idx_lebs;
+ long long total_free;
+ long long total_dirty;
+ long long total_used;
+ long long total_dead;
+ long long total_dark;
+};
+
+struct ubifs_nnode;
+
+/**
+ * struct ubifs_cnode - LEB Properties Tree common node.
+ * @parent: parent nnode
+ * @cnext: next cnode to commit
+ * @flags: flags (%DIRTY_LPT_NODE or %OBSOLETE_LPT_NODE)
+ * @iip: index in parent
+ * @level: level in the tree (zero for pnodes, greater than zero for nnodes)
+ * @num: node number
+ */
+struct ubifs_cnode {
+ struct ubifs_nnode *parent;
+ struct ubifs_cnode *cnext;
+ unsigned long flags;
+ int iip;
+ int level;
+ int num;
+};
+
+/**
+ * struct ubifs_pnode - LEB Properties Tree leaf node.
+ * @parent: parent nnode
+ * @cnext: next cnode to commit
+ * @flags: flags (%DIRTY_LPT_NODE or %OBSOLETE_LPT_NODE)
+ * @iip: index in parent
+ * @level: level in the tree (always zero for pnodes)
+ * @num: node number
+ * @lprops: LEB properties array
+ */
+struct ubifs_pnode {
+ struct ubifs_nnode *parent;
+ struct ubifs_cnode *cnext;
+ unsigned long flags;
+ int iip;
+ int level;
+ int num;
+ struct ubifs_lprops lprops[UBIFS_LPT_FANOUT];
+};
+
+/**
+ * struct ubifs_nbranch - LEB Properties Tree internal node branch.
+ * @lnum: LEB number of child
+ * @offs: offset of child
+ * @nnode: nnode child
+ * @pnode: pnode child
+ * @cnode: cnode child
+ */
+struct ubifs_nbranch {
+ int lnum;
+ int offs;
+ union {
+ struct ubifs_nnode *nnode;
+ struct ubifs_pnode *pnode;
+ struct ubifs_cnode *cnode;
+ };
+};
+
+/**
+ * struct ubifs_nnode - LEB Properties Tree internal node.
+ * @parent: parent nnode
+ * @cnext: next cnode to commit
+ * @flags: flags (%DIRTY_LPT_NODE or %OBSOLETE_LPT_NODE)
+ * @iip: index in parent
+ * @level: level in the tree (always greater than zero for nnodes)
+ * @num: node number
+ * @nbranch: branches to child nodes
+ */
+struct ubifs_nnode {
+ struct ubifs_nnode *parent;
+ struct ubifs_cnode *cnext;
+ unsigned long flags;
+ int iip;
+ int level;
+ int num;
+ struct ubifs_nbranch nbranch[UBIFS_LPT_FANOUT];
+};
+
+/**
+ * struct ubifs_lpt_heap - heap of categorized lprops.
+ * @arr: heap array
+ * @cnt: number in heap
+ * @max_cnt: maximum number allowed in heap
+ *
+ * There are %LPROPS_HEAP_CNT heaps.
+ */
+struct ubifs_lpt_heap {
+ struct ubifs_lprops **arr;
+ int cnt;
+ int max_cnt;
+};
+
+/*
+ * Return codes for LPT scan callback function.
+ *
+ * LPT_SCAN_CONTINUE: continue scanning
+ * LPT_SCAN_ADD: add the LEB properties scanned to the tree in memory
+ * LPT_SCAN_STOP: stop scanning
+ */
+enum {
+ LPT_SCAN_CONTINUE = 0,
+ LPT_SCAN_ADD = 1,
+ LPT_SCAN_STOP = 2,
+};
+
+struct ubifs_info;
+
+/* Callback used by the 'ubifs_lpt_scan_nolock()' function */
+typedef int (*ubifs_lpt_scan_callback)(struct ubifs_info *c,
+ const struct ubifs_lprops *lprops,
+ int in_tree, void *data);
+
+/**
+ * struct ubifs_wbuf - UBIFS write-buffer.
+ * @c: UBIFS file-system description object
+ * @buf: write-buffer (of min. flash I/O unit size)
+ * @lnum: logical eraseblock number the write-buffer points to
+ * @offs: write-buffer offset in this logical eraseblock
+ * @avail: number of bytes available in the write-buffer
+ * @used: number of used bytes in the write-buffer
+ * @dtype: type of data stored in this LEB (%UBI_LONGTERM, %UBI_SHORTTERM,
+ * %UBI_UNKNOWN)
+ * @jhead: journal head the mutex belongs to (note, needed only to shut lockdep
+ * up by 'mutex_lock_nested()).
+ * @sync_callback: write-buffer synchronization callback
+ * @io_mutex: serializes write-buffer I/O
+ * @lock: serializes @buf, @lnum, @offs, @avail, @used, @next_ino and @inodes
+ * fields
+ * @timer: write-buffer timer
+ * @timeout: timer expire interval in jiffies
+ * @need_sync: it is set if its timer expired and needs sync
+ * @next_ino: points to the next position of the following inode number
+ * @inodes: stores the inode numbers of the nodes which are in wbuf
+ *
+ * The write-buffer synchronization callback is called when the write-buffer is
+ * synchronized in order to notify how much space was wasted due to
+ * write-buffer padding and how much free space is left in the LEB.
+ *
+ * Note: the fields @buf, @lnum, @offs, @avail and @used can be read under
+ * spin-lock or mutex because they are written under both mutex and spin-lock.
+ * @buf is appended to under mutex but overwritten under both mutex and
+ * spin-lock. Thus the data between @buf and @buf + @used can be read under
+ * spinlock.
+ */
+struct ubifs_wbuf {
+ struct ubifs_info *c;
+ void *buf;
+ int lnum;
+ int offs;
+ int avail;
+ int used;
+ int dtype;
+ int jhead;
+ int (*sync_callback)(struct ubifs_info *c, int lnum, int free, int pad);
+ struct mutex io_mutex;
+ spinlock_t lock;
+ struct timer_list timer;
+ int timeout;
+ int need_sync;
+ int next_ino;
+ ino_t *inodes;
+};
+
+/**
+ * struct ubifs_bud - bud logical eraseblock.
+ * @lnum: logical eraseblock number
+ * @start: where the (uncommitted) bud data starts
+ * @jhead: journal head number this bud belongs to
+ * @list: link in the list buds belonging to the same journal head
+ * @rb: link in the tree of all buds
+ */
+struct ubifs_bud {
+ int lnum;
+ int start;
+ int jhead;
+ struct list_head list;
+ struct rb_node rb;
+};
+
+/**
+ * struct ubifs_jhead - journal head.
+ * @wbuf: head's write-buffer
+ * @buds_list: list of bud LEBs belonging to this journal head
+ *
+ * Note, the @buds list is protected by the @c->buds_lock.
+ */
+struct ubifs_jhead {
+ struct ubifs_wbuf wbuf;
+ struct list_head buds_list;
+};
+
+/**
+ * struct ubifs_zbranch - key/coordinate/length branch stored in znodes.
+ * @key: key
+ * @znode: znode address in memory
+ * @lnum: LEB number of the indexing node
+ * @offs: offset of the indexing node within @lnum
+ * @len: target node length
+ */
+struct ubifs_zbranch {
+ union ubifs_key key;
+ union {
+ struct ubifs_znode *znode;
+ void *leaf;
+ };
+ int lnum;
+ int offs;
+ int len;
+};
+
+/**
+ * struct ubifs_znode - in-memory representation of an indexing node.
+ * @parent: parent znode or NULL if it is the root
+ * @cnext: next znode to commit
+ * @flags: znode flags (%DIRTY_ZNODE, %COW_ZNODE or %OBSOLETE_ZNODE)
+ * @time: last access time (seconds)
+ * @level: level of the entry in the TNC tree
+ * @child_cnt: count of child znodes
+ * @iip: index in parent's zbranch array
+ * @alt: lower bound of key range has altered i.e. child inserted at slot 0
+ * @lnum: LEB number of the corresponding indexing node
+ * @offs: offset of the corresponding indexing node
+ * @len: length of the corresponding indexing node
+ * @zbranch: array of znode branches (@c->fanout elements)
+ */
+struct ubifs_znode {
+ struct ubifs_znode *parent;
+ struct ubifs_znode *cnext;
+ unsigned long flags;
+ unsigned long time;
+ int level;
+ int child_cnt;
+ int iip;
+ int alt;
+#ifdef CONFIG_UBIFS_FS_DEBUG
+ int lnum, offs, len;
+#endif
+ struct ubifs_zbranch zbranch[];
+};
+
+/**
+ * struct ubifs_node_range - node length range description data structure.
+ * @len: fixed node length
+ * @min_len: minimum possible node length
+ * @max_len: maximum possible node length
+ *
+ * If @max_len is %0, the node has fixed length @len.
+ */
+struct ubifs_node_range {
+ union {
+ int len;
+ int min_len;
+ };
+ int max_len;
+};
+
+/**
+ * struct ubifs_compressor - UBIFS compressor description structure.
+ * @compr_type: compressor type (%UBIFS_COMPR_LZO, etc)
+ * @cc: cryptoapi compressor handle
+ * @comp_mutex: mutex used during compression
+ * @decomp_mutex: mutex used during decompression
+ * @name: compressor name
+ * @capi_name: cryptoapi compressor name
+ */
+struct ubifs_compressor {
+ int compr_type;
+ struct crypto_comp *cc;
+ struct mutex *comp_mutex;
+ struct mutex *decomp_mutex;
+ const char *name;
+ const char *capi_name;
+};
+
+/**
+ * struct ubifs_budget_req - budget requirements of an operation.
+ *
+ * @new_ino: non-zero if the operation adds a new inode
+ * @dirtied_ino: how many inodes the operation makes dirty
+ * @new_page: non-zero if the operation adds a new page
+ * @dirtied_page: non-zero if the operation makes a page dirty
+ * @new_dent: non-zero if the operation adds a new directory entry
+ * @mod_dent: non-zero if the operation removes or modifies an existing
+ * directory entry
+ * @new_ino_d: now much data newly created inode contains
+ * @dirtied_ino_d: now much data dirtied inode contains
+ * @idx_growth: how much the index will supposedly grow
+ * @data_growth: how much new data the operation will supposedly add
+ * @dd_growth: how much data that makes other data dirty the operation will
+ * supposedly add
+ *
+ * @idx_growth, @data_growth and @dd_growth are not used in budget request. The
+ * budgeting subsystem caches index and data growth values there to avoid
+ * re-calculating them when the budget is released. However, if @idx_growth is
+ * %-1, it is calculated by the release function using other fields.
+ *
+ * An inode may contain 4KiB of data at max., thus the widths of @new_ino_d
+ * is 13 bits, and @dirtied_ino_d - 15, because up to 4 inodes may be made
+ * dirty by the re-name operation.
+ */
+struct ubifs_budget_req {
+ unsigned int new_ino:1;
+ unsigned int dirtied_ino:4;
+ unsigned int new_page:1;
+ unsigned int dirtied_page:1;
+ unsigned int new_dent:1;
+ unsigned int mod_dent:1;
+ unsigned int new_ino_d:13;
+ unsigned int dirtied_ino_d:15;
+ int idx_growth;
+ int data_growth;
+ int dd_growth;
+};
+
+/**
+ * struct ubifs_orphan - stores the inode number of an orphan.
+ * @rb: rb-tree node of rb-tree of orphans sorted by inode number
+ * @list: list head of list of orphans in order added
+ * @new_list: list head of list of orphans added since the last commit
+ * @cnext: next orphan to commit
+ * @dnext: next orphan to delete
+ * @inum: inode number
+ * @new: %1 => added since the last commit, otherwise %0
+ */
+struct ubifs_orphan {
+ struct rb_node rb;
+ struct list_head list;
+ struct list_head new_list;
+ struct ubifs_orphan *cnext;
+ struct ubifs_orphan *dnext;
+ ino_t inum;
+ int new;
+};
+
+/**
+ * struct ubifs_mount_opts - UBIFS-specific mount options information.
+ * @unmount_mode: selected unmount mode (%0 default, %1 normal, %2 fast)
+ */
+struct ubifs_mount_opts {
+ unsigned int unmount_mode:2;
+};
+
+/**
+ * struct ubifs_info - UBIFS file-system description data structure
+ * (per-superblock).
+ * @vfs_sb: VFS @struct super_block object
+ *
+ * @highest_inum: highest used inode number
+ * @vfs_gen: VFS inode generation counter
+ * @max_sqnum: current global sequence number
+ * @cmt_no: commit number (last successfully completed commit)
+ * @cnt_lock: protects @highest_inum, @vfs_gen, and @max_sqnum counters
+ * @fmt_version: UBIFS on-flash format version
+ * @uuid: UUID from super block
+ *
+ * @lhead_lnum: log head logical eraseblock number
+ * @lhead_offs: log head offset
+ * @ltail_lnum: log tail logical eraseblock number (offset is always 0)
+ * @log_mutex: protects the log, @lhead_lnum, @lhead_offs, @ltail_lnum, and
+ * @bud_bytes
+ * @min_log_bytes: minimum required number of bytes in the log
+ * @cmt_bud_bytes: used during commit to temporarily amount of bytes in
+ * committed buds
+ *
+ * @buds: tree of all buds indexed by bud LEB number
+ * @bud_bytes: how many bytes of flash is used by buds
+ * @buds_lock: protects the @buds tree, @bud_bytes, and per-journal head bud
+ * lists
+ * @jhead_cnt: count of journal heads
+ * @jheads: journal heads (head zero is base head)
+ * @max_bud_bytes: maximum number of bytes allowed in buds
+ * @bg_bud_bytes: number of bud bytes when background commit is initiated
+ * @old_buds: buds to be released after commit ends
+ * @max_bud_cnt: maximum number of buds
+ *
+ * @commit_sem: synchronizes committer with other processes
+ * @cmt_state: commit state
+ * @cs_lock: commit state lock
+ * @cmt_wq: wait queue to sleep on if the log is full and a commit is running
+ * @fast_unmount: do not run journal commit before unmounting
+ * @big_lpt: flag that LPT is too big to write whole during commit
+ *
+ * @tnc_mutex: protects the Tree Node Cache (TNC), @zroot, @cnext, @enext, and
+ * @calc_idx_sz
+ * @zroot: zbranch which points to the root index node and znode
+ * @cnext: next znode to commit
+ * @enext: next znode to commit to empty space
+ * @gap_lebs: array of LEBs used by the in-gaps commit method
+ * @cbuf: commit buffer
+ * @ileb_buf: buffer for commit in-the-gaps method
+ * @ileb_len: length of data in ileb_buf
+ * @ihead_lnum: LEB number of index head
+ * @ihead_offs: offset of index head
+ * @ilebs: pre-allocated index LEBs
+ * @ileb_cnt: number of pre-allocated index LEBs
+ * @ileb_nxt: next pre-allocated index LEBs
+ * @old_idx: tree of index nodes obsoleted since the last commit start
+ * @bottom_up_buf: a buffer which is used by 'dirty_cow_bottom_up()' in tnc.c
+ * @new_ihead_lnum: used by debugging to check ihead_lnum
+ * @new_ihead_offs: used by debugging to check ihead_offs
+ *
+ * @mst_node: master node
+ * @mst_offs: offset of valid master node
+ * @mst_mutex: protects the master node area, @mst_node, and @mst_offs
+ *
+ * @log_lebs: number of logical eraseblocks in the log
+ * @log_bytes: log size in bytes
+ * @log_last: last LEB of the log
+ * @lpt_lebs: number of LEBs used for lprops table
+ * @lpt_first: first LEB of the lprops table area
+ * @lpt_last: last LEB of the lprops table area
+ * @orph_lebs: number of LEBs used for the orphan area
+ * @orph_first: first LEB of the orphan area
+ * @orph_last: last LEB of the orphan area
+ * @main_lebs: count of LEBs in the main area
+ * @main_first: first LEB of the main area
+ * @main_bytes: main area size in bytes
+ * @default_compr: default compression type
+ *
+ * @key_hash_type: type of the key hash
+ * @key_hash: direntry key hash function
+ * @key_fmt: key format
+ * @key_len: key length
+ * @fanout: fanout of the index tree (number of links per indexing node)
+ *
+ * @min_io_size: minimal input/output unit size
+ * @min_io_shift: number of bits in @min_io_size minus one
+ * @leb_size: logical eraseblock size in bytes
+ * @half_leb_size: half LEB size
+ * @leb_cnt: count of logical eraseblocks
+ * @max_leb_cnt: maximum count of logical eraseblocks
+ * @old_leb_cnt: count of logical eraseblocks before resize
+ * @ro_media: the underlying UBI volume is read-only
+ *
+ * @dirty_pg_cnt: number of dirty pages (not used)
+ * @dirty_ino_cnt: number of dirty inodes (not used)
+ * @dirty_zn_cnt: number of dirty znodes
+ * @clean_zn_cnt: number of clean znodes
+ *
+ * @budg_idx_growth: amount of bytes budgeted for index growth
+ * @budg_data_growth: amount of bytes budgeted for cached data
+ * @budg_dd_growth: amount of bytes budgeted for cached data that will make
+ * other data dirty
+ * @budg_uncommitted_idx: amount of bytes were budgeted for growth of the index,
+ * but which still have to be taken into account because
+ * the index has not been committed so far
+ * @space_lock: protects @budg_idx_growth, @budg_data_growth, @budg_dd_growth,
+ * @budg_uncommited_idx, @min_idx_lebs, @old_idx_sz, and @lst;
+ * @min_idx_lebs: minimum number of LEBs required for the index
+ * @old_idx_sz: size of index on flash
+ * @calc_idx_sz: temporary variable which is used to calculate new index size
+ * (contains accurate new index size at end of TNC commit start)
+ * @lst: lprops statistics
+ *
+ * @page_budget: budget for a page
+ * @inode_budget: budget for an inode
+ * @dent_budget: budget for a directory entry
+ *
+ * @ref_node_alsz: size of the LEB reference node aligned to the min. flash
+ * I/O unit
+ * @mst_node_alsz: master node aligned size
+ * @min_idx_node_sz: minimum indexing node aligned on 8-bytes boundary
+ * @max_idx_node_sz: maximum indexing node aligned on 8-bytes boundary
+ * @max_inode_sz: maximum possible inode size in bytes
+ * @max_znode_sz: size of znode in bytes
+ * @dead_wm: LEB dead space watermark
+ * @dark_wm: LEB dark space watermark
+ * @block_cnt: count of 4KiB blocks on the FS
+ *
+ * @ranges: UBIFS node length ranges
+ * @ubi: UBI volume descriptor
+ * @di: UBI device information
+ * @vi: UBI volume information
+ *
+ * @orph_tree: rb-tree of orphan inode numbers
+ * @orph_list: list of orphan inode numbers in order added
+ * @orph_new: list of orphan inode numbers added since last commit
+ * @orph_cnext: next orphan to commit
+ * @orph_dnext: next orphan to delete
+ * @orphan_lock: lock for orph_tree and orph_new
+ * @orph_buf: buffer for orphan nodes
+ * @new_orphans: number of orphans since last commit
+ * @cmt_orphans: number of orphans being committed
+ * @tot_orphans: number of orphans in the rb_tree
+ * @max_orphans: maximum number of orphans allowed
+ * @ohead_lnum: orphan head LEB number
+ * @ohead_offs: orphan head offset
+ * @no_orphs: non-zero if there are no orphans
+ *
+ * @bgt: UBIFS background thread
+ * @bgt_name: background thread name
+ * @need_bgt: if background thread should run
+ * @need_wbuf_sync: if write-buffers have to be synchronized
+ *
+ * @gc_lnum: LEB number used for garbage collection
+ * @sbuf: a buffer of LEB size used by GC and replay for scanning
+ * @idx_gc: list of index LEBs that have been garbage collected
+ * @idx_gc_cnt: number of elements on the idx_gc list
+ *
+ * @infos_list: links all 'ubifs_info' objects
+ * @umount_mutex: serializes shrinker and un-mount
+ * @shrinker_run_no: shrinker run number
+ *
+ * @space_bits: number of bits needed to record free or dirty space
+ * @lpt_lnum_bits: number of bits needed to record a LEB number in the LPT
+ * @lpt_offs_bits: number of bits needed to record an offset in the LPT
+ * @lpt_spc_bits: number of bits needed to space in the LPT
+ * @pcnt_bits: number of bits needed to record pnode or nnode number
+ * @lnum_bits: number of bits needed to record LEB number
+ * @nnode_sz: size of on-flash nnode
+ * @pnode_sz: size of on-flash pnode
+ * @ltab_sz: size of on-flash LPT lprops table
+ * @lsave_sz: size of on-flash LPT save table
+ * @pnode_cnt: number of pnodes
+ * @nnode_cnt: number of nnodes
+ * @lpt_hght: height of the LPT
+ * @pnodes_have: number of pnodes in memory
+ *
+ * @lp_mutex: protects lprops table and all the other lprops-related fields
+ * @lpt_lnum: LEB number of the root nnode of the LPT
+ * @lpt_offs: offset of the root nnode of the LPT
+ * @nhead_lnum: LEB number of LPT head
+ * @nhead_offs: offset of LPT head
+ * @lpt_drty_flgs: dirty flags for LPT special nodes e.g. ltab
+ * @dirty_nn_cnt: number of dirty nnodes
+ * @dirty_pn_cnt: number of dirty pnodes
+ * @lpt_sz: LPT size
+ * @lpt_nod_buf: buffer for an on-flash nnode or pnode
+ * @lpt_buf: buffer of LEB size used by LPT
+ * @nroot: address in memory of the root nnode of the LPT
+ * @lpt_cnext: next LPT node to commit
+ * @lpt_heap: array of heaps of categorized lprops
+ * @dirty_idx: a (reverse sorted) copy of the LPROPS_DIRTY_IDX heap as at
+ * previous commit start
+ * @uncat_list: list of un-categorized LEBs
+ * @empty_list: list of empty LEBs
+ * @freeable_list: list of freeable non-index LEBs (free + dirty == leb_size)
+ * @frdi_idx_list: list of freeable index LEBs (free + dirty == leb_size)
+ * @freeable_cnt: number of freeable LEBs in @freeable_list
+ *
+ * @ltab_lnum: LEB number of LPT's own lprops table
+ * @ltab_offs: offset of LPT's own lprops table
+ * @ltab: LPT's own lprops table
+ * @ltab_cmt: LPT's own lprops table (commit copy)
+ * @lsave_cnt: number of LEB numbers in LPT's save table
+ * @lsave_lnum: LEB number of LPT's save table
+ * @lsave_offs: offset of LPT's save table
+ * @lsave: LPT's save table
+ * @lscan_lnum: LEB number of last LPT scan
+ *
+ * @rp_size: size of the reserved pool in bytes
+ * @report_rp_size: size of the reserved pool reported to userspace
+ * @rp_uid: reserved pool user ID
+ * @rp_gid: reserved pool group ID
+ *
+ * @empty: if the UBI device is empty
+ * @replay_tree: temporary tree used during journal replay
+ * @replay_list: temporary list used during journal replay
+ * @replay_buds: list of buds to replay
+ * @cs_sqnum: sequence number of first node in the log (commit start node)
+ * @replay_sqnum: sequence number of node currently being replayed
+ * @need_recovery: file-system needs recovery
+ * @replaying: set to %1 during journal replay
+ * @unclean_leb_list: LEBs to recover when mounting ro to rw
+ * @rcvrd_mst_node: recovered master node to write when mounting ro to rw
+ * @size_tree: inode size information for recovery
+ * @remounting_rw: set while remounting from ro to rw (sb flags have MS_RDONLY)
+ * @mount_opts: UBIFS-specific mount options
+ *
+ * @dbg_buf: a buffer of LEB size used for debugging purposes
+ * @old_zroot: old index root - used by 'dbg_check_old_index()'
+ * @old_zroot_level: old index root level - used by 'dbg_check_old_index()'
+ * @old_zroot_sqnum: old index root sqnum - used by 'dbg_check_old_index()'
+ * @failure_mode: failure mode for recovery testing
+ * @fail_delay: 0=>don't delay, 1=>delay a time, 2=>delay a number of calls
+ * @fail_timeout: time in jiffies when delay of failure mode expires
+ * @fail_cnt: current number of calls to failure mode I/O functions
+ * @fail_cnt_max: number of calls by which to delay failure mode
+ */
+struct ubifs_info {
+ struct super_block *vfs_sb;
+
+ ino_t highest_inum;
+ unsigned int vfs_gen;
+ unsigned long long max_sqnum;
+ unsigned long long cmt_no;
+ spinlock_t cnt_lock;
+ int fmt_version;
+ unsigned char uuid[16];
+
+ int lhead_lnum;
+ int lhead_offs;
+ int ltail_lnum;
+ struct mutex log_mutex;
+ int min_log_bytes;
+ long long cmt_bud_bytes;
+
+ struct rb_root buds;
+ long long bud_bytes;
+ spinlock_t buds_lock;
+ int jhead_cnt;
+ struct ubifs_jhead *jheads;
+ long long max_bud_bytes;
+ long long bg_bud_bytes;
+ struct list_head old_buds;
+ int max_bud_cnt;
+
+ struct rw_semaphore commit_sem;
+ int cmt_state;
+ spinlock_t cs_lock;
+ wait_queue_head_t cmt_wq;
+ unsigned int fast_unmount:1;
+ unsigned int big_lpt:1;
+
+ struct mutex tnc_mutex;
+ struct ubifs_zbranch zroot;
+ struct ubifs_znode *cnext;
+ struct ubifs_znode *enext;
+ int *gap_lebs;
+ void *cbuf;
+ void *ileb_buf;
+ int ileb_len;
+ int ihead_lnum;
+ int ihead_offs;
+ int *ilebs;
+ int ileb_cnt;
+ int ileb_nxt;
+ struct rb_root old_idx;
+ int *bottom_up_buf;
+#ifdef CONFIG_UBIFS_FS_DEBUG
+ int new_ihead_lnum;
+ int new_ihead_offs;
+#endif
+
+ struct ubifs_mst_node *mst_node;
+ int mst_offs;
+ struct mutex mst_mutex;
+
+ int log_lebs;
+ long long log_bytes;
+ int log_last;
+ int lpt_lebs;
+ int lpt_first;
+ int lpt_last;
+ int orph_lebs;
+ int orph_first;
+ int orph_last;
+ int main_lebs;
+ int main_first;
+ long long main_bytes;
+ int default_compr;
+
+ uint8_t key_hash_type;
+ uint32_t (*key_hash)(const char *str, int len);
+ int key_fmt;
+ int key_len;
+ int fanout;
+
+ int min_io_size;
+ int min_io_shift;
+ int leb_size;
+ int half_leb_size;
+ int leb_cnt;
+ int max_leb_cnt;
+ int old_leb_cnt;
+ int ro_media;
+
+ atomic_long_t dirty_pg_cnt;
+ atomic_long_t dirty_ino_cnt;
+ atomic_long_t dirty_zn_cnt;
+ atomic_long_t clean_zn_cnt;
+
+ long long budg_idx_growth;
+ long long budg_data_growth;
+ long long budg_dd_growth;
+ long long budg_uncommitted_idx;
+ spinlock_t space_lock;
+ int min_idx_lebs;
+ unsigned long long old_idx_sz;
+ unsigned long long calc_idx_sz;
+ struct ubifs_lp_stats lst;
+
+ int page_budget;
+ int inode_budget;
+ int dent_budget;
+
+ int ref_node_alsz;
+ int mst_node_alsz;
+ int min_idx_node_sz;
+ int max_idx_node_sz;
+ long long max_inode_sz;
+ int max_znode_sz;
+ int dead_wm;
+ int dark_wm;
+ int block_cnt;
+
+ struct ubifs_node_range ranges[UBIFS_NODE_TYPES_CNT];
+ struct ubi_volume_desc *ubi;
+ struct ubi_device_info di;
+ struct ubi_volume_info vi;
+
+ struct rb_root orph_tree;
+ struct list_head orph_list;
+ struct list_head orph_new;
+ struct ubifs_orphan *orph_cnext;
+ struct ubifs_orphan *orph_dnext;
+ spinlock_t orphan_lock;
+ void *orph_buf;
+ int new_orphans;
+ int cmt_orphans;
+ int tot_orphans;
+ int max_orphans;
+ int ohead_lnum;
+ int ohead_offs;
+ int no_orphs;
+
+ struct task_struct *bgt;
+ char bgt_name[sizeof(BGT_NAME_PATTERN) + 9];
+ int need_bgt;
+ int need_wbuf_sync;
+
+ int gc_lnum;
+ void *sbuf;
+ struct list_head idx_gc;
+ int idx_gc_cnt;
+
+ struct list_head infos_list;
+ struct mutex umount_mutex;
+ unsigned int shrinker_run_no;
+
+ int space_bits;
+ int lpt_lnum_bits;
+ int lpt_offs_bits;
+ int lpt_spc_bits;
+ int pcnt_bits;
+ int lnum_bits;
+ int nnode_sz;
+ int pnode_sz;
+ int ltab_sz;
+ int lsave_sz;
+ int pnode_cnt;
+ int nnode_cnt;
+ int lpt_hght;
+ int pnodes_have;
+
+ struct mutex lp_mutex;
+ int lpt_lnum;
+ int lpt_offs;
+ int nhead_lnum;
+ int nhead_offs;
+ int lpt_drty_flgs;
+ int dirty_nn_cnt;
+ int dirty_pn_cnt;
+ long long lpt_sz;
+ void *lpt_nod_buf;
+ void *lpt_buf;
+ struct ubifs_nnode *nroot;
+ struct ubifs_cnode *lpt_cnext;
+ struct ubifs_lpt_heap lpt_heap[LPROPS_HEAP_CNT];
+ struct ubifs_lpt_heap dirty_idx;
+ struct list_head uncat_list;
+ struct list_head empty_list;
+ struct list_head freeable_list;
+ struct list_head frdi_idx_list;
+ int freeable_cnt;
+
+ int ltab_lnum;
+ int ltab_offs;
+ struct ubifs_lpt_lprops *ltab;
+ struct ubifs_lpt_lprops *ltab_cmt;
+ int lsave_cnt;
+ int lsave_lnum;
+ int lsave_offs;
+ int *lsave;
+ int lscan_lnum;
+
+ long long rp_size;
+ long long report_rp_size;
+ uid_t rp_uid;
+ gid_t rp_gid;
+
+ /* The below fields are used only during mounting and re-mounting */
+ int empty;
+ struct rb_root replay_tree;
+ struct list_head replay_list;
+ struct list_head replay_buds;
+ unsigned long long cs_sqnum;
+ unsigned long long replay_sqnum;
+ int need_recovery;
+ int replaying;
+ struct list_head unclean_leb_list;
+ struct ubifs_mst_node *rcvrd_mst_node;
+ struct rb_root size_tree;
+ int remounting_rw;
+ struct ubifs_mount_opts mount_opts;
+
+#ifdef CONFIG_UBIFS_FS_DEBUG
+ void *dbg_buf;
+ struct ubifs_zbranch old_zroot;
+ int old_zroot_level;
+ unsigned long long old_zroot_sqnum;
+ int failure_mode;
+ int fail_delay;
+ unsigned long fail_timeout;
+ unsigned int fail_cnt;
+ unsigned int fail_cnt_max;
+#endif
+};
+
+extern struct list_head ubifs_infos;
+extern spinlock_t ubifs_infos_lock;
+extern atomic_long_t ubifs_clean_zn_cnt;
+extern struct kmem_cache *ubifs_inode_slab;
+extern struct super_operations ubifs_super_operations;
+extern struct address_space_operations ubifs_file_address_operations;
+extern struct file_operations ubifs_file_operations;
+extern struct inode_operations ubifs_file_inode_operations;
+extern struct file_operations ubifs_dir_operations;
+extern struct inode_operations ubifs_dir_inode_operations;
+extern struct inode_operations ubifs_symlink_inode_operations;
+extern struct backing_dev_info ubifs_backing_dev_info;
+extern struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
+
+/* io.c */
+int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len);
+int ubifs_wbuf_seek_nolock(struct ubifs_wbuf *wbuf, int lnum, int offs,
+ int dtype);
+int ubifs_wbuf_init(struct ubifs_info *c, struct ubifs_wbuf *wbuf);
+int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
+ int lnum, int offs);
+int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
+ int lnum, int offs);
+int ubifs_write_node(struct ubifs_info *c, void *node, int len, int lnum,
+ int offs, int dtype);
+int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum,
+ int offs, int quiet);
+void ubifs_prepare_node(struct ubifs_info *c, void *buf, int len, int pad);
+void ubifs_prep_grp_node(struct ubifs_info *c, void *node, int len, int last);
+int ubifs_io_init(struct ubifs_info *c);
+void ubifs_pad(const struct ubifs_info *c, void *buf, int pad);
+int ubifs_wbuf_sync_nolock(struct ubifs_wbuf *wbuf);
+int ubifs_bg_wbufs_sync(struct ubifs_info *c);
+void ubifs_wbuf_add_ino_nolock(struct ubifs_wbuf *wbuf, ino_t inum);
+int ubifs_sync_wbufs_by_inodes(struct ubifs_info *c,
+ struct inode * const *inodes, int count);
+
+/* scan.c */
+struct ubifs_scan_leb *ubifs_scan(const struct ubifs_info *c, int lnum,
+ int offs, void *sbuf);
+void ubifs_scan_destroy(struct ubifs_scan_leb *sleb);
+int ubifs_scan_a_node(const struct ubifs_info *c, void *buf, int len, int lnum,
+ int offs, int quiet);
+struct ubifs_scan_leb *ubifs_start_scan(const struct ubifs_info *c, int lnum,
+ int offs, void *sbuf);
+void ubifs_end_scan(const struct ubifs_info *c, struct ubifs_scan_leb *sleb,
+ int lnum, int offs);
+int ubifs_add_snod(const struct ubifs_info *c, struct ubifs_scan_leb *sleb,
+ void *buf, int offs);
+void ubifs_scanned_corruption(const struct ubifs_info *c, int lnum, int offs,
+ void *buf);
+
+/* log.c */
+void ubifs_add_bud(struct ubifs_info *c, struct ubifs_bud *bud);
+void ubifs_create_buds_lists(struct ubifs_info *c);
+int ubifs_add_bud_to_log(struct ubifs_info *c, int jhead, int lnum, int offs);
+struct ubifs_bud *ubifs_search_bud(struct ubifs_info *c, int lnum);
+struct ubifs_wbuf *ubifs_get_wbuf(struct ubifs_info *c, int lnum);
+int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum);
+int ubifs_log_end_commit(struct ubifs_info *c, int new_ltail_lnum);
+int ubifs_log_post_commit(struct ubifs_info *c, int old_ltail_lnum);
+int ubifs_consolidate_log(struct ubifs_info *c);
+
+/* journal.c */
+int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir,
+ const struct qstr *nm, const struct inode *inode,
+ int deletion, int sync, int xent);
+int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
+ const union ubifs_key *key, const void *buf, int len);
+int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode,
+ int last_reference, int sync);
+int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
+ const struct dentry *old_dentry,
+ const struct inode *new_dir,
+ const struct dentry *new_dentry, int sync);
+int ubifs_jnl_truncate(struct ubifs_info *c, ino_t inum,
+ loff_t old_size, loff_t new_size);
+int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host,
+ const struct inode *inode, const struct qstr *nm,
+ int sync);
+int ubifs_jnl_write_2_inodes(struct ubifs_info *c, const struct inode *inode1,
+ const struct inode *inode2, int sync);
+
+/* budget.c */
+int ubifs_budget_space(struct ubifs_info *c, struct ubifs_budget_req *req);
+void ubifs_release_budget(struct ubifs_info *c, struct ubifs_budget_req *req);
+int ubifs_budget_inode_op(struct ubifs_info *c, struct inode *inode,
+ struct ubifs_budget_req *req);
+void ubifs_release_ino_dirty(struct ubifs_info *c, struct inode *inode,
+ struct ubifs_budget_req *req);
+void ubifs_cancel_ino_op(struct ubifs_info *c, struct inode *inode,
+ struct ubifs_budget_req *req);
+int ubifs_budget_ino_cleaning(struct ubifs_info *c, struct inode *inode,
+ struct ubifs_budget_req *req);
+void ubifs_release_ino_clean(struct ubifs_info *c, struct inode *inode,
+ struct ubifs_budget_req *req);
+long long ubifs_budg_get_free_space(struct ubifs_info *c);
+int ubifs_calc_min_idx_lebs(struct ubifs_info *c);
+void ubifs_convert_page_budget(struct ubifs_info *c);
+void ubifs_release_new_page_budget(struct ubifs_info *c);
+long long ubifs_calc_available(const struct ubifs_info *c);
+
+/* find.c */
+int ubifs_find_free_space(struct ubifs_info *c, int min_space, int *free,
+ int squeeze);
+int ubifs_find_free_leb_for_idx(struct ubifs_info *c);
+int ubifs_find_dirty_leb(struct ubifs_info *c, struct ubifs_lprops *ret_lp,
+ int min_space, int pick_free);
+int ubifs_find_dirty_idx_leb(struct ubifs_info *c);
+int ubifs_save_dirty_idx_lnums(struct ubifs_info *c);
+
+/* tnc.c */
+int ubifs_lookup_level0(struct ubifs_info *c, const union ubifs_key *key,
+ struct ubifs_znode **zn, int *n);
+int ubifs_tnc_lookup(struct ubifs_info *c, const union ubifs_key *key,
+ void *node);
+int ubifs_tnc_lookup_nm(struct ubifs_info *c, const union ubifs_key *key,
+ void *node, const struct qstr *nm);
+int ubifs_tnc_locate(struct ubifs_info *c, const union ubifs_key *key,
+ void *node, int *lnum, int *offs);
+int ubifs_tnc_add(struct ubifs_info *c, const union ubifs_key *key, int lnum,
+ int offs, int len);
+int ubifs_tnc_replace(struct ubifs_info *c, const union ubifs_key *key,
+ int old_lnum, int old_offs, int lnum, int offs, int len);
+int ubifs_tnc_add_nm(struct ubifs_info *c, const union ubifs_key *key,
+ int lnum, int offs, int len, const struct qstr *nm);
+int ubifs_tnc_remove(struct ubifs_info *c, const union ubifs_key *key);
+int ubifs_tnc_remove_nm(struct ubifs_info *c, const union ubifs_key *key,
+ const struct qstr *nm);
+int ubifs_tnc_remove_range(struct ubifs_info *c, union ubifs_key *from_key,
+ union ubifs_key *to_key);
+int ubifs_tnc_remove_ino(struct ubifs_info *c, ino_t inum);
+struct ubifs_dent_node *ubifs_tnc_next_ent(struct ubifs_info *c,
+ union ubifs_key *key,
+ const struct qstr *nm);
+void ubifs_tnc_close(struct ubifs_info *c);
+int ubifs_tnc_has_node(struct ubifs_info *c, union ubifs_key *key, int level,
+ int lnum, int offs, int is_idx);
+int ubifs_dirty_idx_node(struct ubifs_info *c, union ubifs_key *key, int level,
+ int lnum, int offs);
+/* Shared by tnc.c for tnc_commit.c */
+void destroy_old_idx(struct ubifs_info *c);
+int is_idx_node_in_tnc(struct ubifs_info *c, union ubifs_key *key, int level,
+ int lnum, int offs);
+int insert_old_idx_znode(struct ubifs_info *c, struct ubifs_znode *znode);
+
+/* tnc_misc.c */
+struct ubifs_znode *ubifs_tnc_levelorder_next(struct ubifs_znode *zr,
+ struct ubifs_znode *znode);
+int ubifs_search_zbranch(const struct ubifs_info *c,
+ const struct ubifs_znode *znode,
+ const union ubifs_key *key, int *n);
+struct ubifs_znode *ubifs_tnc_postorder_first(struct ubifs_znode *znode);
+struct ubifs_znode *ubifs_tnc_postorder_next(struct ubifs_znode *znode);
+long ubifs_destroy_tnc_subtree(struct ubifs_znode *zr);
+struct ubifs_znode *ubifs_load_znode(struct ubifs_info *c,
+ struct ubifs_zbranch *zbr,
+ struct ubifs_znode *parent, int iip);
+int ubifs_tnc_read_node(struct ubifs_info *c, struct ubifs_zbranch *zbr,
+ void *node);
+
+/* tnc_commit.c */
+int ubifs_tnc_start_commit(struct ubifs_info *c, struct ubifs_zbranch *zroot);
+int ubifs_tnc_end_commit(struct ubifs_info *c);
+
+/* shrinker.c */
+int ubifs_shrinker(int nr_to_scan, gfp_t gfp_mask);
+
+/* commit.c */
+int ubifs_bg_thread(void *info);
+void ubifs_commit_required(struct ubifs_info *c);
+void ubifs_request_bg_commit(struct ubifs_info *c);
+int ubifs_run_commit(struct ubifs_info *c);
+void ubifs_recovery_commit(struct ubifs_info *c);
+int ubifs_gc_should_commit(struct ubifs_info *c);
+void ubifs_wait_for_commit(struct ubifs_info *c);
+
+/* master.c */
+int ubifs_read_master(struct ubifs_info *c);
+int ubifs_write_master(struct ubifs_info *c);
+
+/* sb.c */
+int ubifs_read_superblock(struct ubifs_info *c);
+struct ubifs_sb_node *ubifs_read_sb_node(struct ubifs_info *c);
+int ubifs_write_sb_node(struct ubifs_info *c, struct ubifs_sb_node *sup);
+
+/* replay.c */
+int ubifs_validate_entry(struct ubifs_info *c,
+ const struct ubifs_dent_node *dent);
+int ubifs_replay_journal(struct ubifs_info *c);
+
+/* gc.c */
+int ubifs_garbage_collect(struct ubifs_info *c, int anyway);
+int ubifs_gc_start_commit(struct ubifs_info *c);
+int ubifs_gc_end_commit(struct ubifs_info *c);
+void ubifs_destroy_idx_gc(struct ubifs_info *c);
+int ubifs_get_idx_gc_leb(struct ubifs_info *c);
+int ubifs_garbage_collect_leb(struct ubifs_info *c, struct ubifs_lprops *lp);
+
+/* orphan.c */
+int ubifs_add_orphan(struct ubifs_info *c, ino_t inum);
+void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum);
+int ubifs_orphan_start_commit(struct ubifs_info *c);
+int ubifs_orphan_end_commit(struct ubifs_info *c);
+int ubifs_mount_orphans(struct ubifs_info *c, int unclean, int read_only);
+
+/* lpt.c */
+int ubifs_calc_lpt_geom(struct ubifs_info *c);
+int ubifs_create_dflt_lpt(struct ubifs_info *c, int *main_lebs, int lpt_first,
+ int *lpt_lebs, int *big_lpt);
+int ubifs_lpt_init(struct ubifs_info *c, int rd, int wr);
+struct ubifs_lprops *ubifs_lpt_lookup(struct ubifs_info *c, int lnum);
+struct ubifs_lprops *ubifs_lpt_lookup_dirty(struct ubifs_info *c, int lnum);
+int ubifs_lpt_scan_nolock(struct ubifs_info *c, int start_lnum, int end_lnum,
+ ubifs_lpt_scan_callback scan_cb, void *data);
+
+/* Shared by lpt.c for lpt_commit.c */
+void ubifs_pack_lsave(struct ubifs_info *c, void *buf, int *lsave);
+void ubifs_pack_ltab(struct ubifs_info *c, void *buf,
+ struct ubifs_lpt_lprops *ltab);
+void ubifs_pack_pnode(struct ubifs_info *c, void *buf,
+ struct ubifs_pnode *pnode);
+void ubifs_pack_nnode(struct ubifs_info *c, void *buf,
+ struct ubifs_nnode *nnode);
+struct ubifs_pnode *ubifs_get_pnode(struct ubifs_info *c,
+ struct ubifs_nnode *parent, int iip);
+struct ubifs_nnode *ubifs_get_nnode(struct ubifs_info *c,
+ struct ubifs_nnode *parent, int iip);
+int ubifs_read_nnode(struct ubifs_info *c, struct ubifs_nnode *parent, int iip);
+void ubifs_add_lpt_dirt(struct ubifs_info *c, int lnum, int dirty);
+void ubifs_add_nnode_dirt(struct ubifs_info *c, struct ubifs_nnode *nnode);
+uint32_t ubifs_unpack_bits(uint8_t **addr, int *pos, int nrbits);
+struct ubifs_nnode *ubifs_first_nnode(struct ubifs_info *c, int *hght);
+
+/* lpt_commit.c */
+int ubifs_lpt_start_commit(struct ubifs_info *c);
+int ubifs_lpt_end_commit(struct ubifs_info *c);
+int ubifs_lpt_post_commit(struct ubifs_info *c);
+void ubifs_lpt_free(struct ubifs_info *c, int wr_only);
+
+/* lprops.c */
+void ubifs_get_lprops(struct ubifs_info *c);
+const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c,
+ const struct ubifs_lprops *lp,
+ int free, int dirty, int flags,
+ int idx_gc_cnt);
+void ubifs_release_lprops(struct ubifs_info *c);
+void ubifs_get_lp_stats(struct ubifs_info *c, struct ubifs_lp_stats *stats);
+void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops,
+ int cat);
+void ubifs_replace_cat(struct ubifs_info *c, struct ubifs_lprops *old_lprops,
+ struct ubifs_lprops *new_lprops);
+void ubifs_ensure_cat(struct ubifs_info *c, struct ubifs_lprops *lprops);
+int ubifs_categorize_lprops(const struct ubifs_info *c,
+ const struct ubifs_lprops *lprops);
+int ubifs_change_one_lp(struct ubifs_info *c, int lnum, int free, int dirty,
+ int flags_set, int flags_clean, int idx_gc_cnt);
+int ubifs_update_one_lp(struct ubifs_info *c, int lnum, int free, int dirty,
+ int flags_set, int flags_clean);
+int ubifs_read_one_lp(struct ubifs_info *c, int lnum, struct ubifs_lprops *lp);
+const struct ubifs_lprops *ubifs_fast_find_free(struct ubifs_info *c);
+const struct ubifs_lprops *ubifs_fast_find_empty(struct ubifs_info *c);
+const struct ubifs_lprops *ubifs_fast_find_freeable(struct ubifs_info *c);
+const struct ubifs_lprops *ubifs_fast_find_frdi_idx(struct ubifs_info *c);
+
+/* file.c */
+int ubifs_fsync(struct file *file, struct dentry *dentry, int datasync);
+int ubifs_setattr(struct dentry *dentry, struct iattr *attr);
+
+/* dir.c */
+struct inode *ubifs_new_inode(struct ubifs_info *c, const struct inode *dir,
+ int mode);
+int ubifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat);
+
+/* xattr.c */
+int ubifs_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags);
+ssize_t ubifs_getxattr(struct dentry *dentry, const char *name, void *buf,
+ size_t size);
+ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size);
+int ubifs_removexattr(struct dentry *dentry, const char *name);
+
+/* super.c */
+struct inode *ubifs_iget(struct super_block *sb, unsigned long inum);
+
+/* recovery.c */
+int ubifs_recover_master_node(struct ubifs_info *c);
+int ubifs_write_rcvrd_mst_node(struct ubifs_info *c);
+struct ubifs_scan_leb *ubifs_recover_leb(struct ubifs_info *c, int lnum,
+ int offs, void *sbuf, int grouped);
+struct ubifs_scan_leb *ubifs_recover_log_leb(struct ubifs_info *c, int lnum,
+ int offs, void *sbuf);
+int ubifs_recover_inl_heads(const struct ubifs_info *c, void *sbuf);
+int ubifs_clean_lebs(const struct ubifs_info *c, void *sbuf);
+int ubifs_rcvry_gc_commit(struct ubifs_info *c);
+int ubifs_recover_size_accum(struct ubifs_info *c, union ubifs_key *key,
+ int deletion, loff_t new_size);
+int ubifs_recover_size(struct ubifs_info *c);
+void ubifs_destroy_size_tree(struct ubifs_info *c);
+
+/* ioctl.c */
+long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
+void ubifs_set_inode_flags(struct inode *inode);
+#ifdef CONFIG_COMPAT
+long ubifs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
+#endif
+
+/* compressor.c */
+int __init ubifs_compressors_init(void);
+void __exit ubifs_compressors_exit(void);
+void ubifs_compress(const void *in_buf, int in_len, void *out_buf, int *out_len,
+ int *compr_type);
+int ubifs_decompress(const void *buf, int len, void *out, int *out_len,
+ int compr_type);
+
+#include "debug.h"
+#include "misc.h"
+#include "key.h"
+
+#endif /* !__UBIFS_H__ */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/ubifs-media.h avr32-2.6/fs/ubifs/ubifs-media.h
--- linux-2.6.25.6/fs/ubifs/ubifs-media.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/ubifs-media.h 2008-06-12 15:09:45.603817614 +0200
@@ -0,0 +1,729 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file describes UBIFS on-flash format and contains definitions of all the
+ * relevant data structures and constants.
+ *
+ * All UBIFS on-flash objects are stored in the form of nodes. All nodes start
+ * with the UBIFS node magic number and have the same common header. Nodes
+ * always sit at 8-byte aligned positions on the media and node header sizes are
+ * also 8-byte aligned (except for the indexing node and the padding node).
+ */
+
+#ifndef __UBIFS_MEDIA_H__
+#define __UBIFS_MEDIA_H__
+
+/* UBIFS node magic number (must not have the padding byte first or last) */
+#define UBIFS_NODE_MAGIC 0x06101831
+
+/* UBIFS on-flash format version */
+#define UBIFS_FORMAT_VERSION 4
+
+/* Minimum logical eraseblock size in bytes */
+#define UBIFS_MIN_LEB_SZ (15*1024)
+
+/* Initial CRC32 value used when calculating CRC checksums */
+#define UBIFS_CRC32_INIT 0xFFFFFFFFU
+
+/*
+ * UBIFS does not try to compress data if its length is less than the below
+ * constant.
+ */
+#define UBIFS_MIN_COMPR_LEN 128
+
+/* Root inode number */
+#define UBIFS_ROOT_INO 1
+
+/* Lowest inode number used for regular inodes (not UBIFS-only internal ones) */
+#define UBIFS_FIRST_INO 64
+
+/*
+ * Maximum file name and extended attribute length (must be a multiple of 8,
+ * minus 1).
+ */
+#define UBIFS_MAX_NLEN 255
+
+/* Maximum number of data journal heads */
+#define UBIFS_MAX_JHEADS 1
+
+/*
+ * Size of UBIFS data block. Note, UBIFS is not a block oriented file-system,
+ * which means that it does not treat the underlying media as consisting of
+ * blocks like in case of hard drives. Do not be confused. UBIFS block is just
+ * the maximum amount of data which one data node can have or which can be
+ * attached to an inode node.
+ */
+#define UBIFS_BLOCK_SIZE 4096
+#define UBIFS_BLOCK_SHIFT 12
+#define UBIFS_BLOCK_MASK 0x00000FFF
+
+/* UBIFS padding byte pattern (must not be first or last byte of node magic) */
+#define UBIFS_PADDING_BYTE 0xCE
+
+/* Maximum possible key length */
+#define UBIFS_MAX_KEY_LEN 16
+
+/* Key length ("simple" format) */
+#define UBIFS_SK_LEN 8
+
+/* Minimum index tree fanout */
+#define UBIFS_MIN_FANOUT 2
+
+/* Maximum number of levels in UBIFS indexing B-tree */
+#define UBIFS_MAX_LEVELS 512
+
+/* Maximum amount of data attached to an inode in bytes */
+#define UBIFS_MAX_INO_DATA UBIFS_BLOCK_SIZE
+
+/* LEB Properties Tree fanout (must be power of 2) and fanout shift */
+#define UBIFS_LPT_FANOUT 4
+#define UBIFS_LPT_FANOUT_SHIFT 2
+
+/* LEB Properties Tree bit field sizes */
+#define UBIFS_LPT_CRC_BITS 16
+#define UBIFS_LPT_CRC_BYTES 2
+#define UBIFS_LPT_TYPE_BITS 4
+
+/* The key is always at the same position in all keyed nodes */
+#define UBIFS_KEY_OFFSET offsetof(struct ubifs_ino_node, key)
+
+/*
+ * LEB Properties Tree node types.
+ *
+ * UBIFS_LPT_PNODE: LPT leaf node (contains LEB properties)
+ * UBIFS_LPT_NNODE: LPT internal node
+ * UBIFS_LPT_LTAB: LPT's own lprops table
+ * UBIFS_LPT_LSAVE: LPT's save table (big model only)
+ * UBIFS_LPT_NODE_CNT: count of LPT node types
+ * UBIFS_LPT_NOT_A_NODE: all ones (15 for 4 bits) is never a valid node type
+ */
+enum {
+ UBIFS_LPT_PNODE,
+ UBIFS_LPT_NNODE,
+ UBIFS_LPT_LTAB,
+ UBIFS_LPT_LSAVE,
+ UBIFS_LPT_NODE_CNT,
+ UBIFS_LPT_NOT_A_NODE = (1 << UBIFS_LPT_TYPE_BITS) - 1,
+};
+
+/*
+ * UBIFS inode types.
+ *
+ * UBIFS_ITYPE_REG: regular file
+ * UBIFS_ITYPE_DIR: directory
+ * UBIFS_ITYPE_LNK: soft link
+ * UBIFS_ITYPE_BLK: block device node
+ * UBIFS_ITYPE_CHR: character device node
+ * UBIFS_ITYPE_FIFO: fifo
+ * UBIFS_ITYPE_SOCK: socket
+ * UBIFS_ITYPES_CNT: count of supported file types
+ */
+enum {
+ UBIFS_ITYPE_REG,
+ UBIFS_ITYPE_DIR,
+ UBIFS_ITYPE_LNK,
+ UBIFS_ITYPE_BLK,
+ UBIFS_ITYPE_CHR,
+ UBIFS_ITYPE_FIFO,
+ UBIFS_ITYPE_SOCK,
+ UBIFS_ITYPES_CNT,
+};
+
+/*
+ * Supported key hash functions.
+ *
+ * UBIFS_KEY_HASH_R5: R5 hash
+ * UBIFS_KEY_HASH_TEST: test hash which just returns first 4 bytes of the name
+ */
+enum {
+ UBIFS_KEY_HASH_R5,
+ UBIFS_KEY_HASH_TEST,
+};
+
+/*
+ * Supported key formats.
+ *
+ * UBIFS_SIMPLE_KEY_FMT: simple key format
+ */
+enum {
+ UBIFS_SIMPLE_KEY_FMT,
+};
+
+/*
+ * The simple key format uses 29 bits for storing UBIFS block number and hash
+ * value.
+ */
+#define UBIFS_S_KEY_BLOCK_BITS 29
+#define UBIFS_S_KEY_BLOCK_MASK 0x1FFFFFFF
+#define UBIFS_S_KEY_HASH_BITS UBIFS_S_KEY_BLOCK_BITS
+#define UBIFS_S_KEY_HASH_MASK UBIFS_S_KEY_BLOCK_MASK
+
+/*
+ * Key types.
+ *
+ * UBIFS_INO_KEY: inode node key
+ * UBIFS_DATA_KEY: data node key
+ * UBIFS_DENT_KEY: directory entry node key
+ * UBIFS_XENT_KEY: extended attribute entry key
+ * UBIFS_KEY_TYPES_CNT: number of supported key types
+ */
+enum {
+ UBIFS_INO_KEY,
+ UBIFS_DATA_KEY,
+ UBIFS_DENT_KEY,
+ UBIFS_XENT_KEY,
+ UBIFS_KEY_TYPES_CNT,
+};
+
+/* Count of LEBs reserved for the superblock area */
+#define UBIFS_SB_LEBS 1
+/* Count of LEBs reserved for the master area */
+#define UBIFS_MST_LEBS 2
+
+/* First LEB of the superblock area */
+#define UBIFS_SB_LNUM 0
+/* First LEB of the master area */
+#define UBIFS_MST_LNUM (UBIFS_SB_LNUM + UBIFS_SB_LEBS)
+/* First LEB of the log area */
+#define UBIFS_LOG_LNUM (UBIFS_MST_LNUM + UBIFS_MST_LEBS)
+
+/* Minimum number of logical eraseblocks in the log */
+#define UBIFS_MIN_LOG_LEBS 2
+/* Minimum number of bud logical eraseblocks */
+#define UBIFS_MIN_BUD_LEBS 2
+/* Minimum number of journal logical eraseblocks */
+#define UBIFS_MIN_JNL_LEBS (UBIFS_MIN_LOG_LEBS + UBIFS_MIN_BUD_LEBS)
+/* Minimum number of LPT area logical eraseblocks */
+#define UBIFS_MIN_LPT_LEBS 2
+/* Minimum number of orphan area logical eraseblocks */
+#define UBIFS_MIN_ORPH_LEBS 1
+/* Minimum number of main area logical eraseblocks */
+#define UBIFS_MIN_MAIN_LEBS 8
+
+/* Minimum number of logical eraseblocks */
+#define UBIFS_MIN_LEB_CNT (UBIFS_SB_LEBS + UBIFS_MST_LEBS + \
+ UBIFS_MIN_LOG_LEBS + UBIFS_MIN_BUD_LEBS + \
+ UBIFS_MIN_LPT_LEBS + UBIFS_MIN_ORPH_LEBS + \
+ UBIFS_MIN_MAIN_LEBS)
+
+/* Node sizes (N.B. these are guaranteed to be multiples of 8) */
+#define UBIFS_CH_SZ sizeof(struct ubifs_ch)
+#define UBIFS_INO_NODE_SZ sizeof(struct ubifs_ino_node)
+#define UBIFS_DATA_NODE_SZ sizeof(struct ubifs_data_node)
+#define UBIFS_DENT_NODE_SZ sizeof(struct ubifs_dent_node)
+#define UBIFS_TRUN_NODE_SZ sizeof(struct ubifs_trun_node)
+#define UBIFS_PAD_NODE_SZ sizeof(struct ubifs_pad_node)
+#define UBIFS_SB_NODE_SZ sizeof(struct ubifs_sb_node)
+#define UBIFS_MST_NODE_SZ sizeof(struct ubifs_mst_node)
+#define UBIFS_REF_NODE_SZ sizeof(struct ubifs_ref_node)
+#define UBIFS_IDX_NODE_SZ sizeof(struct ubifs_idx_node)
+#define UBIFS_CS_NODE_SZ sizeof(struct ubifs_cs_node)
+#define UBIFS_ORPH_NODE_SZ sizeof(struct ubifs_orph_node)
+/* Extended attribute entry nodes are identical to directory entry nodes */
+#define UBIFS_XENT_NODE_SZ UBIFS_DENT_NODE_SZ
+/* Only this does not have to be multiple of 8 bytes */
+#define UBIFS_BRANCH_SZ sizeof(struct ubifs_branch)
+
+/* Maximum node sizes (N.B. these are guaranteed to be multiples of 8) */
+#define UBIFS_MAX_DATA_NODE_SZ (UBIFS_DATA_NODE_SZ + UBIFS_BLOCK_SIZE)
+#define UBIFS_MAX_INO_NODE_SZ (UBIFS_INO_NODE_SZ + UBIFS_MAX_INO_DATA)
+#define UBIFS_MAX_DENT_NODE_SZ (UBIFS_DENT_NODE_SZ + UBIFS_MAX_NLEN + 1)
+#define UBIFS_MAX_XENT_NODE_SZ UBIFS_MAX_DENT_NODE_SZ
+
+/* The largest UBIFS node */
+#define UBIFS_MAX_NODE_SZ UBIFS_MAX_INO_NODE_SZ
+
+/*
+ * On-flash inode flags.
+ *
+ * UBIFS_COMPR_FL: use compression for this inode
+ * UBIFS_SYNC_FL: I/O on this inode has to be synchronous
+ * UBIFS_IMMUTABLE_FL: inode is immutable
+ * UBIFS_APPEND_FL: writes to the inode may only append data
+ * UBIFS_DIRSYNC_FL: I/O on this directory inode has to be synchronous
+ *
+ * Note, these are on-flash flags which correspond to ioctl flags
+ * (@FS_COMPR_FL, etc). They have the same values now, but generally, do not
+ * have to be the same.
+ */
+enum {
+ UBIFS_COMPR_FL = 0x01,
+ UBIFS_SYNC_FL = 0x02,
+ UBIFS_IMMUTABLE_FL = 0x04,
+ UBIFS_APPEND_FL = 0x08,
+ UBIFS_DIRSYNC_FL = 0x10,
+};
+
+/* Inode flag bits used by UBIFS */
+#define UBIFS_FL_MASK 0x0000001F
+
+/*
+ * UBIFS compression types.
+ *
+ * UBIFS_COMPR_NONE: no compression
+ * UBIFS_COMPR_LZO: LZO compression
+ * UBIFS_COMPR_ZLIB: ZLIB compression
+ * UBIFS_COMPR_TYPES_CNT: count of supported compression types
+ */
+enum {
+ UBIFS_COMPR_NONE,
+ UBIFS_COMPR_LZO,
+ UBIFS_COMPR_ZLIB,
+ UBIFS_COMPR_TYPES_CNT,
+};
+
+/*
+ * UBIFS node types.
+ *
+ * UBIFS_INO_NODE: inode node
+ * UBIFS_DATA_NODE: data node
+ * UBIFS_DENT_NODE: directory entry node
+ * UBIFS_XENT_NODE: extended attribute node
+ * UBIFS_TRUN_NODE: truncation node
+ * UBIFS_PAD_NODE: padding node
+ * UBIFS_SB_NODE: superblock node
+ * UBIFS_MST_NODE: master node
+ * UBIFS_REF_NODE: LEB reference node
+ * UBIFS_IDX_NODE: index node
+ * UBIFS_CS_NODE: commit start node
+ * UBIFS_ORPH_NODE: orphan node
+ * UBIFS_NODE_TYPES_CNT: count of supported node types
+ *
+ * Note, we index arrays by these numbers, so keep them low and contiguous.
+ * Node type constants for inodes, direntries and so on have to be the same as
+ * corresponding key type constants.
+ */
+enum {
+ UBIFS_INO_NODE,
+ UBIFS_DATA_NODE,
+ UBIFS_DENT_NODE,
+ UBIFS_XENT_NODE,
+ UBIFS_TRUN_NODE,
+ UBIFS_PAD_NODE,
+ UBIFS_SB_NODE,
+ UBIFS_MST_NODE,
+ UBIFS_REF_NODE,
+ UBIFS_IDX_NODE,
+ UBIFS_CS_NODE,
+ UBIFS_ORPH_NODE,
+ UBIFS_NODE_TYPES_CNT,
+};
+
+/*
+ * Master node flags.
+ *
+ * UBIFS_MST_DIRTY: rebooted uncleanly - master node is dirty
+ * UBIFS_MST_NO_ORPHS: no orphan inodes present
+ * UBIFS_MST_RCVRY: written by recovery
+ */
+enum {
+ UBIFS_MST_DIRTY = 1,
+ UBIFS_MST_NO_ORPHS = 2,
+ UBIFS_MST_RCVRY = 4,
+};
+
+/*
+ * Node group type (used by recovery to recover whole group or none).
+ *
+ * UBIFS_NO_NODE_GROUP: this node is not part of a group
+ * UBIFS_IN_NODE_GROUP: this node is a part of a group
+ * UBIFS_LAST_OF_NODE_GROUP: this node is the last in a group
+ */
+enum {
+ UBIFS_NO_NODE_GROUP = 0,
+ UBIFS_IN_NODE_GROUP,
+ UBIFS_LAST_OF_NODE_GROUP,
+};
+
+/*
+ * Superblock flags.
+ *
+ * UBIFS_FLG_BIGLPT: if "big" LPT model is used if set
+ */
+enum {
+ UBIFS_FLG_BIGLPT = 0x02,
+};
+
+/**
+ * struct ubifs_ch - common header node.
+ * @magic: UBIFS node magic number (%UBIFS_NODE_MAGIC)
+ * @crc: CRC-32 checksum of the node header
+ * @sqnum: sequence number
+ * @len: full node length
+ * @node_type: node type
+ * @group_type: node group type
+ * @padding: reserved for future, zeroes
+ *
+ * Every UBIFS node starts with this common part. If the node has a key, the
+ * key always goes next.
+ */
+struct ubifs_ch {
+ __le32 magic;
+ __le32 crc;
+ __le64 sqnum;
+ __le32 len;
+ __u8 node_type;
+ __u8 group_type;
+ __u8 padding[2];
+} __attribute__ ((packed));
+
+/**
+ * union ubifs_dev_desc - device node descriptor.
+ * @new: new type device descriptor
+ * @huge: huge type device descriptor
+ *
+ * This data structure describes major/minor numbers of a device node. In an
+ * inode is a device node then its data contains an object of this type. UBIFS
+ * uses standard Linux "new" and "huge" device node encodings.
+ */
+union ubifs_dev_desc {
+ __le32 new;
+ __le64 huge;
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_ino_node - inode node.
+ * @ch: common header
+ * @key: node key
+ * @creat_sqnum: sequence number at time of creation
+ * @size: inode size in bytes (amount of uncompressed data)
+ * @atime_sec: access time seconds
+ * @ctime_sec: creation time seconds
+ * @mtime_sec: modification time seconds
+ * @atime_nsec: access time nanoseconds
+ * @ctime_nsec: creation time nanoseconds
+ * @mtime_nsec: modification time nanoseconds
+ * @nlink: number of hard links
+ * @uid: owner ID
+ * @gid: group ID
+ * @mode: access flags
+ * @flags: per-inode flags (%UBIFS_COMPR_FL, %UBIFS_SYNC_FL, etc)
+ * @data_len: inode data length
+ * @xattr_cnt: count of extended attributes this inode has
+ * @xattr_size: summarized size of all extended attributes in bytes
+ * @xattr_names: sum of lengths of all extended attribute names belonging to
+ * this inode
+ * @compr_type: compression type used for this inode
+ * @padding: reserved for future, zeroes
+ * @data: data attached to the inode
+ *
+ * Note, even though inode compression type is defined by @compr_type, some
+ * nodes of this inode may be compressed with different compressor - this
+ * happens if compression type is changed while the inode already has data
+ * nodes. But @compr_type will be use for further writes to the inode.
+ *
+ * Note, do not forget to amend 'zero_ino_node_unused()' function when changing
+ * the padding fields.
+ */
+struct ubifs_ino_node {
+ struct ubifs_ch ch;
+ __u8 key[UBIFS_MAX_KEY_LEN];
+ __le64 creat_sqnum;
+ __le64 size;
+ __le64 atime_sec;
+ __le64 ctime_sec;
+ __le64 mtime_sec;
+ __le32 atime_nsec;
+ __le32 ctime_nsec;
+ __le32 mtime_nsec;
+ __le32 nlink;
+ __le32 uid;
+ __le32 gid;
+ __le32 mode;
+ __le32 flags;
+ __le32 data_len;
+ __le32 xattr_cnt;
+ __le64 xattr_size;
+ __le32 xattr_names;
+ __le16 compr_type;
+ __u8 padding[26]; /* Watch 'zero_ino_node_unused()' if changing! */
+ __u8 data[];
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_dent_node - directory entry node.
+ * @ch: common header
+ * @key: node key
+ * @inum: target inode number
+ * @padding1: reserved for future, zeroes
+ * @type: type of the target inode (%UBIFS_ITYPE_REG, %UBIFS_ITYPE_DIR, etc)
+ * @nlen: name length
+ * @padding2: reserved for future, zeroes
+ * @name: zero-terminated name
+ *
+ * Note, do not forget to amend 'zero_dent_node_unused()' function when
+ * changing the padding fields.
+ */
+struct ubifs_dent_node {
+ struct ubifs_ch ch;
+ __u8 key[UBIFS_MAX_KEY_LEN];
+ __le64 inum;
+ __u8 padding1;
+ __u8 type;
+ __le16 nlen;
+ __u8 padding2[4]; /* Watch 'zero_dent_node_unused()' if changing! */
+ __u8 name[];
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_data_node - data node.
+ * @ch: common header
+ * @key: node key
+ * @size: uncompressed data size in bytes
+ * @compr_type: compression type (%UBIFS_COMPR_NONE, %UBIFS_COMPR_LZO, etc)
+ * @padding: reserved for future, zeroes
+ * @data: data
+ *
+ * Note, do not forget to amend 'zero_data_node_unused()' function when
+ * changing the padding fields.
+ */
+struct ubifs_data_node {
+ struct ubifs_ch ch;
+ __u8 key[UBIFS_MAX_KEY_LEN];
+ __le32 size;
+ __le16 compr_type;
+ __u8 padding[2]; /* Watch 'zero_data_node_unused()' if changing! */
+ __u8 data[];
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_trun_node - truncation node.
+ * @ch: common header
+ * @inum: truncated inode number
+ * @padding: reserved for future, zeroes
+ * @old_size: size before truncation
+ * @new_size: size after truncation
+ *
+ * This node exists only in the journal and never goes to the main area. Note,
+ * do not forget to amend 'zero_trun_node_unused()' function when changing the
+ * padding fields.
+ */
+struct ubifs_trun_node {
+ struct ubifs_ch ch;
+ __le32 inum;
+ __u8 padding[12]; /* Watch 'zero_trun_node_unused()' if changing! */
+ __le64 old_size;
+ __le64 new_size;
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_pad_node - padding node.
+ * @ch: common header
+ * @pad_len: how many bytes after this node are unused (because padded)
+ * @padding: reserved for future, zeroes
+ */
+struct ubifs_pad_node {
+ struct ubifs_ch ch;
+ __le32 pad_len;
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_sb_node - superblock node.
+ * @ch: common header
+ * @padding: reserved for future, zeroes
+ * @key_hash: type of hash function used in keys
+ * @key_fmt: format of the key
+ * @flags: file-system flags (%UBIFS_FLG_BIGLPT, etc)
+ * @min_io_size: minimal input/output unit size
+ * @leb_size: logical eraseblock size in bytes
+ * @leb_cnt: count of LEBs used by filesystem
+ * @max_leb_cnt: maximum count of LEBs used by filesystem
+ * @max_bud_bytes: maximum amount of data stored in buds
+ * @log_lebs: log size in logical eraseblocks
+ * @lpt_lebs: number of LEBs used for lprops table
+ * @orph_lebs: number of LEBs used for recording orphans
+ * @jhead_cnt: count of journal heads
+ * @fanout: tree fanout (max. number of links per indexing node)
+ * @lsave_cnt: number of LEB numbers in LPT's save table
+ * @fmt_version: UBIFS on-flash format version
+ * @default_compr: default compression
+ * @padding1: reserved for future, zeroes
+ * @rp_uid: reserve pool UID
+ * @rp_gid: reserve pool GID
+ * @rp_size: size of the reserved pool in bytes
+ * @padding2: reserved for future, zeroes
+ * @time_gran: time granularity in nanoseconds
+ * @uuid: UUID generated when the file system image was created
+ */
+struct ubifs_sb_node {
+ struct ubifs_ch ch;
+ __u8 padding[2];
+ __u8 key_hash;
+ __u8 key_fmt;
+ __le32 flags;
+ __le32 min_io_size;
+ __le32 leb_size;
+ __le32 leb_cnt;
+ __le32 max_leb_cnt;
+ __le64 max_bud_bytes;
+ __le32 log_lebs;
+ __le32 lpt_lebs;
+ __le32 orph_lebs;
+ __le32 jhead_cnt;
+ __le32 fanout;
+ __le32 lsave_cnt;
+ __le32 fmt_version;
+ __le16 default_compr;
+ __u8 padding1[2];
+ __le32 rp_uid;
+ __le32 rp_gid;
+ __le64 rp_size;
+ __le32 time_gran;
+ __u8 uuid[16];
+ __u8 padding2[3972];
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_mst_node - master node.
+ * @ch: common header
+ * @highest_inum: highest inode number in the committed index
+ * @cmt_no: commit number
+ * @flags: various flags (%UBIFS_MST_DIRTY, etc)
+ * @log_lnum: start of the log
+ * @root_lnum: LEB number of the root indexing node
+ * @root_offs: offset within @root_lnum
+ * @root_len: root indexing node length
+ * @gc_lnum: LEB reserved for garbage collection (%-1 value means the LEB was
+ * not reserved and should be reserved on mount)
+ * @ihead_lnum: LEB number of index head
+ * @ihead_offs: offset of index head
+ * @index_size: size of index on flash
+ * @total_free: total free space in bytes
+ * @total_dirty: total dirty space in bytes
+ * @total_used: total used space in bytes (includes only data LEBs)
+ * @total_dead: total dead space in bytes (includes only data LEBs)
+ * @total_dark: total dark space in bytes (includes only data LEBs)
+ * @lpt_lnum: LEB number of LPT root nnode
+ * @lpt_offs: offset of LPT root nnode
+ * @nhead_lnum: LEB number of LPT head
+ * @nhead_offs: offset of LPT head
+ * @ltab_lnum: LEB number of LPT's own lprops table
+ * @ltab_offs: offset of LPT's own lprops table
+ * @lsave_lnum: LEB number of LPT's save table (big model only)
+ * @lsave_offs: offset of LPT's save table (big model only)
+ * @lscan_lnum: LEB number of last LPT scan
+ * @empty_lebs: number of empty logical eraseblocks
+ * @idx_lebs: number of indexing logical eraseblocks
+ * @leb_cnt: count of LEBs used by filesystem
+ * @padding: reserved for future, zeroes
+ */
+struct ubifs_mst_node {
+ struct ubifs_ch ch;
+ __le64 highest_inum;
+ __le64 cmt_no;
+ __le32 flags;
+ __le32 log_lnum;
+ __le32 root_lnum;
+ __le32 root_offs;
+ __le32 root_len;
+ __le32 gc_lnum;
+ __le32 ihead_lnum;
+ __le32 ihead_offs;
+ __le64 index_size;
+ __le64 total_free;
+ __le64 total_dirty;
+ __le64 total_used;
+ __le64 total_dead;
+ __le64 total_dark;
+ __le32 lpt_lnum;
+ __le32 lpt_offs;
+ __le32 nhead_lnum;
+ __le32 nhead_offs;
+ __le32 ltab_lnum;
+ __le32 ltab_offs;
+ __le32 lsave_lnum;
+ __le32 lsave_offs;
+ __le32 lscan_lnum;
+ __le32 empty_lebs;
+ __le32 idx_lebs;
+ __le32 leb_cnt;
+ __u8 padding[344];
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_ref_node - logical eraseblock reference node.
+ * @ch: common header
+ * @lnum: the referred logical eraseblock number
+ * @offs: start offset in the referred LEB
+ * @jhead: journal head number
+ * @padding: reserved for future, zeroes
+ */
+struct ubifs_ref_node {
+ struct ubifs_ch ch;
+ __le32 lnum;
+ __le32 offs;
+ __le32 jhead;
+ __u8 padding[28];
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_branch - key/reference/length branch
+ * @lnum: LEB number of the target node
+ * @offs: offset within @lnum
+ * @len: target node length
+ * @key: key
+ */
+struct ubifs_branch {
+ __le32 lnum;
+ __le32 offs;
+ __le32 len;
+ __u8 key[];
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_idx_node - indexing node.
+ * @ch: common header
+ * @child_cnt: number of child index nodes
+ * @level: tree level
+ * @branches: LEB number / offset / length / key branches
+ */
+struct ubifs_idx_node {
+ struct ubifs_ch ch;
+ __le16 child_cnt;
+ __le16 level;
+ __u8 branches[];
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_cs_node - commit start node.
+ * @ch: common header
+ * @cmt_no: commit number
+ */
+struct ubifs_cs_node {
+ struct ubifs_ch ch;
+ __le64 cmt_no;
+} __attribute__ ((packed));
+
+/**
+ * struct ubifs_orph_node - orphan node.
+ * @ch: common header
+ * @cmt_no: commit number (also top bit is set on the last node of the commit)
+ * @inos: inode numbers of orphans
+ */
+struct ubifs_orph_node {
+ struct ubifs_ch ch;
+ __le64 cmt_no;
+ __le64 inos[];
+} __attribute__ ((packed));
+
+#endif /* __UBIFS_MEDIA_H__ */
diff --exclude=.git -urN linux-2.6.25.6/fs/ubifs/xattr.c avr32-2.6/fs/ubifs/xattr.c
--- linux-2.6.25.6/fs/ubifs/xattr.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/fs/ubifs/xattr.c 2008-06-12 15:09:45.603817614 +0200
@@ -0,0 +1,581 @@
+/*
+ * This file is part of UBIFS.
+ *
+ * Copyright (C) 2006-2008 Nokia Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors: Artem Bityutskiy (Битюцкий Артём)
+ * Adrian Hunter
+ */
+
+/*
+ * This file implements UBIFS extended attributes support.
+ *
+ * Extended attributes are implemented as regular inodes with attached data,
+ * which limits extended attribute size to UBIFS block size (4KiB). Names of
+ * extended attributes are described by extended attribute entries (xentries),
+ * which are almost identical to directory entries, but have different key type.
+ *
+ * In other words, the situation with extended attributes is very similar to
+ * directories. Indeed, any inode (but of course not xattr inodes) may have a
+ * number of associated xentries, just like directory inodes have associated
+ * directory entries. Extended attribute entries store the name of the extended
+ * attribute, the host inode number, and the extended attribute inode number.
+ * Similarly, direntries store the name, the parent and the target inode
+ * numbers. Thus, most of the common UBIFS mechanisms may be re-used for
+ * extended attributes.
+ *
+ * The number of extended attributes is not limited, but there is Linux
+ * limitation on the maximum possible size of the list of all extended
+ * attributes associated with an inode (%XATTR_LIST_MAX), so UBIFS makes sure
+ * the sum of all extended attribute names of the inode does not exceed that
+ * limit.
+ *
+ * Extended attributes are synchronous, which means they are written to the
+ * flash media synchronously and there is no write-back for extended attribute
+ * inodes. The extended attribute values are not stored in compressed form on
+ * the media.
+ *
+ * Since extended attributes are represented by regular inodes, they are cached
+ * in the VFS inode cache. The xentries are cached in the LNC cache (see
+ * tnc.c).
+ *
+ * ACL support is not implemented.
+ */
+
+#include <linux/xattr.h>
+#include <linux/posix_acl_xattr.h>
+#include "ubifs.h"
+
+/*
+ * Extended attribute type constants.
+ *
+ * USER_XATTR: user extended attribute ("user.*")
+ * TRUSTED_XATTR: trusted extended attribute ("trusted.*)
+ * SECURITY_XATTR: security extended attribute ("security.*")
+ */
+enum {
+ USER_XATTR,
+ TRUSTED_XATTR,
+ SECURITY_XATTR,
+};
+
+static struct inode_operations none_inode_operations;
+static struct address_space_operations none_address_operations;
+static struct file_operations none_file_operations;
+
+/**
+ * create_xattr - create an extended attribute.
+ * @c: UBIFS file-system description object
+ * @host: host inode
+ * @nm: extended attribute name
+ * @value: extended attribute value
+ * @size: size of extended attribute value
+ *
+ * This is a helper function which creates an extended attribute of name @nm
+ * and value @value for inode @host. The host inode is also updated on flash
+ * because the ctime and extended attribute accounting data changes. This
+ * function returns zero in case of success and a negative error code in case
+ * of failure.
+ */
+static int create_xattr(struct ubifs_info *c, struct inode *host,
+ const struct qstr *nm, const void *value, int size)
+{
+ struct ubifs_inode *ui, *host_ui = ubifs_inode(host);
+ struct ubifs_budget_req req = { .new_ino = 1, .new_dent = 1,
+ .new_ino_d = size };
+ struct inode *inode;
+ int err;
+
+ /*
+ * Linux limits the maximum size of the extended attribute names list
+ * to %XATTR_LIST_MAX. This means we should not allow creating more*
+ * extended attributes if the name list becomes larger. This limitation
+ * is artificial for UBIFS, though.
+ */
+ if (host_ui->xattr_names + host_ui->xattr_cnt +
+ nm->len + 1 > XATTR_LIST_MAX)
+ return -ENOSPC;
+
+ err = ubifs_budget_inode_op(c, host, &req);
+ if (err)
+ return err;
+
+ inode = ubifs_new_inode(c, host, S_IFREG | S_IRWXUGO);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ goto out_budg;
+ }
+
+ /* Re-define all operations to be "nothing" */
+ inode->i_mapping->a_ops = &none_address_operations;
+ inode->i_op = &none_inode_operations;
+ inode->i_fop = &none_file_operations;
+
+ inode->i_flags |= S_SYNC | S_NOATIME | S_NOCMTIME | S_NOQUOTA;
+ ui = ubifs_inode(inode);
+ ui->xattr = 1;
+ ui->data = kmalloc(size, GFP_NOFS);
+ if (!ui->data) {
+ err = -ENOMEM;
+ goto out_inode;
+ }
+
+ memcpy(ui->data, value, size);
+ host->i_ctime = ubifs_current_time(host);
+ host_ui->xattr_cnt += 1;
+ spin_lock(&host->i_lock);
+ host_ui->xattr_size += CALC_DENT_SIZE(nm->len);
+ host_ui->xattr_size += CALC_XATTR_BYTES(size);
+ spin_unlock(&host->i_lock);
+ host_ui->xattr_names += nm->len;
+
+ /*
+ * We do not use i_size_write() because nobody can race with us as we
+ * are holding host @host->i_mutex - every xattr operation for this
+ * inode is serialized by it.
+ */
+ inode->i_size = size;
+ ui->data_len = size;
+
+ /*
+ * Note, it is important that 'ubifs_jnl_update()' writes the @host
+ * inode last, so when it gets synchronized and the write-buffer is
+ * flushed, the extended attribute is flushed as well.
+ */
+ err = ubifs_jnl_update(c, host, nm, inode, 0, IS_DIRSYNC(host), 1);
+ if (err)
+ goto out_cancel;
+
+ ubifs_release_ino_clean(c, host, &req);
+ insert_inode_hash(inode);
+ iput(inode);
+ return 0;
+
+out_cancel:
+ host_ui->xattr_cnt -= 1;
+ spin_lock(&host->i_lock);
+ host_ui->xattr_size -= CALC_DENT_SIZE(nm->len);
+ host_ui->xattr_size -= CALC_XATTR_BYTES(size);
+ spin_unlock(&host->i_lock);
+out_inode:
+ make_bad_inode(inode);
+ iput(inode);
+out_budg:
+ ubifs_cancel_ino_op(c, host, &req);
+ return err;
+}
+
+/**
+ * change_xattr - change an extended attribute.
+ * @c: UBIFS file-system description object
+ * @host: host inode
+ * @inode: extended attribute inode
+ * @value: extended attribute value
+ * @size: size of extended attribute value
+ *
+ * This helper function changes the value of extended attribute @inode with new
+ * data from @value. Returns zero in case of success and a negative error code
+ * in case of failure.
+ */
+static int change_xattr(struct ubifs_info *c, struct inode *host,
+ struct inode *inode, const void *value, int size)
+{
+ struct ubifs_inode *host_ui = ubifs_inode(host);
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ struct ubifs_budget_req req = { .dirtied_ino = 1,
+ .dirtied_ino_d = ui->data_len };
+ int err;
+
+ ubifs_assert(ui->data_len == inode->i_size);
+
+ err = ubifs_budget_inode_op(c, host, &req);
+ if (err)
+ return err;
+
+ host->i_ctime = ubifs_current_time(host);
+ spin_lock(&host->i_lock);
+ host_ui->xattr_size -= CALC_XATTR_BYTES(ui->data_len);
+ host_ui->xattr_size += CALC_XATTR_BYTES(size);
+ spin_unlock(&host->i_lock);
+
+ kfree(ui->data);
+ ui->data = kmalloc(size, GFP_NOFS);
+ if (!ui->data) {
+ err = -ENOMEM;
+ goto out_budg;
+ }
+
+ memcpy(ui->data, value, size);
+ inode->i_size = size;
+ ui->data_len = size;
+
+ /*
+ * It is important to write the host inode after the xattr inode
+ * because if the host inode gets synchronized, then the extended
+ * attribute inode gets synchronized, because it goes before the host
+ * inode in the write-buffer.
+ */
+ err = ubifs_jnl_write_2_inodes(c, inode, host, IS_DIRSYNC(host));
+ if (err)
+ goto out_cancel;
+
+ ubifs_release_ino_clean(c, host, &req);
+ return 0;
+
+out_cancel:
+ spin_lock(&host->i_lock);
+ host_ui->xattr_size -= CALC_XATTR_BYTES(size);
+ host_ui->xattr_size += CALC_XATTR_BYTES(ui->data_len);
+ spin_unlock(&host->i_lock);
+ make_bad_inode(inode);
+out_budg:
+ ubifs_cancel_ino_op(c, host, &req);
+ return err;
+}
+
+/**
+ * check_namespace - check extended attribute name-space.
+ * @nm: extended attribute name
+ *
+ * This function makes sure the extended attribute name belongs to one of the
+ * supported extended attribute name-spaces. Returns name-space index in case
+ * of success and a negative error code in case of failure.
+ */
+static int check_namespace(const struct qstr *nm)
+{
+ int type;
+
+ if (nm->len > UBIFS_MAX_NLEN)
+ return -ENAMETOOLONG;
+
+ if (!strncmp(nm->name, XATTR_TRUSTED_PREFIX,
+ XATTR_TRUSTED_PREFIX_LEN)) {
+ if (nm->name[sizeof(XATTR_TRUSTED_PREFIX) - 1] == '\0')
+ return -EINVAL;
+ type = TRUSTED_XATTR;
+ } else if (!strncmp(nm->name, XATTR_USER_PREFIX,
+ XATTR_USER_PREFIX_LEN)) {
+ if (nm->name[XATTR_USER_PREFIX_LEN] == '\0')
+ return -EINVAL;
+ type = USER_XATTR;
+ } else if (!strncmp(nm->name, XATTR_SECURITY_PREFIX,
+ XATTR_SECURITY_PREFIX_LEN)) {
+ if (nm->name[sizeof(XATTR_SECURITY_PREFIX) - 1] == '\0')
+ return -EINVAL;
+ type = SECURITY_XATTR;
+ } else
+ return -EOPNOTSUPP;
+
+ return type;
+}
+
+int ubifs_setxattr(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
+{
+ struct inode *inode, *host = dentry->d_inode;
+ struct ubifs_info *c = host->i_sb->s_fs_info;
+ struct qstr nm = { .name = name, .len = strlen(name) };
+ struct ubifs_dent_node *xent;
+ union ubifs_key key;
+ int err, type;
+
+ dbg_gen("xattr '%s', host ino %lu ('%.*s'), size %zd", name,
+ host->i_ino, dentry->d_name.len, dentry->d_name.name, size);
+ ubifs_assert(ubifs_inode(host)->xattr_cnt >= 0);
+ ubifs_assert(ubifs_inode(host)->xattr_size >= 0);
+ ubifs_assert(ubifs_inode(host)->xattr_names >= 0);
+
+ if (size > UBIFS_MAX_INO_DATA)
+ return -ERANGE;
+
+ type = check_namespace(&nm);
+ if (type < 0)
+ return type;
+
+ xent = kmalloc(UBIFS_MAX_XENT_NODE_SZ, GFP_NOFS);
+ if (!xent)
+ return -ENOMEM;
+
+ /*
+ * The extended attribute entries are stored in LNC, so multiple
+ * look-ups do not involve reading the flash.
+ */
+ xent_key_init(c, &key, host->i_ino, &nm);
+ err = ubifs_tnc_lookup_nm(c, &key, xent, &nm);
+ if (err) {
+ if (err != -ENOENT)
+ goto out_free;
+
+ if (flags & XATTR_REPLACE)
+ /* We are asked not to create the xattr */
+ err = -ENODATA;
+ else
+ err = create_xattr(c, host, &nm, value, size);
+ goto out_free;
+ }
+
+ if (flags & XATTR_CREATE) {
+ /* We are asked not to replace the xattr */
+ err = -EEXIST;
+ goto out_free;
+ }
+
+ inode = ubifs_iget(c->vfs_sb, le64_to_cpu(xent->inum));
+ if (IS_ERR(inode)) {
+ ubifs_err("dead extended attribute entry, error %d", err);
+ ubifs_ro_mode(c, err);
+ err = PTR_ERR(inode);
+ goto out_free;
+ }
+
+ err = change_xattr(c, host, inode, value, size);
+ iput(inode);
+
+out_free:
+ kfree(xent);
+ return err;
+}
+
+ssize_t ubifs_getxattr(struct dentry *dentry, const char *name, void *buf,
+ size_t size)
+{
+ struct inode *inode, *host = dentry->d_inode;
+ struct ubifs_info *c = host->i_sb->s_fs_info;
+ struct qstr nm = { .name = name, .len = strlen(name) };
+ struct ubifs_inode *ui;
+ struct ubifs_dent_node *xent;
+ union ubifs_key key;
+ int err;
+
+ dbg_gen("xattr '%s', ino %lu ('%.*s'), buf size %zd", name,
+ host->i_ino, dentry->d_name.len, dentry->d_name.name, size);
+ ubifs_assert(ubifs_inode(host)->xattr_cnt >= 0);
+ ubifs_assert(ubifs_inode(host)->xattr_size >= 0);
+ ubifs_assert(ubifs_inode(host)->xattr_names >= 0);
+
+ err = check_namespace(&nm);
+ if (err < 0)
+ return err;
+
+ xent = kmalloc(UBIFS_MAX_XENT_NODE_SZ, GFP_NOFS);
+ if (!xent)
+ return -ENOMEM;
+
+ mutex_lock(&host->i_mutex);
+ xent_key_init(c, &key, host->i_ino, &nm);
+ err = ubifs_tnc_lookup_nm(c, &key, xent, &nm);
+ if (err) {
+ if (err == -ENOENT)
+ err = -ENODATA;
+ goto out_unlock;
+ }
+
+ inode = ubifs_iget(c->vfs_sb, le64_to_cpu(xent->inum));
+ if (IS_ERR(inode)) {
+ ubifs_err("dead extended attribute entry, error %d", err);
+ ubifs_ro_mode(c, err);
+ err = PTR_ERR(inode);
+ goto out_unlock;
+ }
+
+ ui = ubifs_inode(inode);
+ ubifs_assert(inode->i_size == ui->data_len);
+ ubifs_assert(ubifs_inode(host)->xattr_size > ui->data_len);
+
+ if (buf) {
+ /* If @buf is %NULL we are supposed to return the length */
+ if (ui->data_len > size) {
+ dbg_err("buffer size %zd, xattr len %d",
+ size, ui->data_len);
+ err = -ERANGE;
+ goto out_iput;
+ }
+
+ memcpy(buf, ui->data, ui->data_len);
+ }
+ err = ui->data_len;
+
+out_iput:
+ iput(inode);
+out_unlock:
+ mutex_unlock(&host->i_mutex);
+ kfree(xent);
+ return err;
+}
+
+ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size)
+{
+ struct inode *host = dentry->d_inode;
+ struct ubifs_info *c = host->i_sb->s_fs_info;
+ struct ubifs_inode *host_ui = ubifs_inode(host);
+ union ubifs_key key;
+ struct ubifs_dent_node *xent, *pxent = NULL;
+ int err, len, written = 0;
+ struct qstr nm = { .name = NULL };
+
+ dbg_gen("ino %lu ('%.*s'), buffer size %zd", host->i_ino,
+ dentry->d_name.len, dentry->d_name.name, size);
+ ubifs_assert(host_ui->xattr_cnt >= 0);
+ ubifs_assert(host_ui->xattr_size >= 0);
+ ubifs_assert(host_ui->xattr_names >= 0);
+
+ len = host_ui->xattr_names + host_ui->xattr_cnt;
+ if (!buffer)
+ /*
+ * We should return the minimum buffer size which will fit a
+ * null-terminated list of all the extended attribute names.
+ */
+ return len;
+
+ if (len > size)
+ return -ERANGE;
+
+ lowest_xent_key(c, &key, host->i_ino);
+
+ mutex_lock(&host->i_mutex);
+ while (1) {
+ int type;
+
+ xent = ubifs_tnc_next_ent(c, &key, &nm);
+ if (unlikely(IS_ERR(xent))) {
+ err = PTR_ERR(xent);
+ break;
+ }
+
+ nm.name = xent->name;
+ nm.len = le16_to_cpu(xent->nlen);
+
+ type = check_namespace(&nm);
+ if (unlikely(type < 0)) {
+ err = type;
+ break;
+ }
+
+ /* Show trusted namespace only for "power" users */
+ if (type != TRUSTED_XATTR || capable(CAP_SYS_ADMIN)) {
+ memcpy(buffer + written, nm.name, nm.len + 1);
+ written += nm.len + 1;
+ }
+
+ kfree(pxent);
+ pxent = xent;
+ key_read(c, &xent->key, &key);
+ }
+ mutex_unlock(&host->i_mutex);
+
+ kfree(pxent);
+ if (err != -ENOENT) {
+ ubifs_err("cannot find next direntry, error %d", err);
+ return err;
+ }
+
+ ubifs_assert(written <= size);
+ return written;
+}
+
+static int remove_xattr(struct ubifs_info *c, struct inode *host,
+ struct inode *inode, const struct qstr *nm)
+{
+ struct ubifs_inode *host_ui = ubifs_inode(host);
+ struct ubifs_inode *ui = ubifs_inode(inode);
+ struct ubifs_budget_req req = { .dirtied_ino = 1, .mod_dent = 1 };
+ int err;
+
+ ubifs_assert(ui->data_len == inode->i_size);
+
+ err = ubifs_budget_inode_op(c, host, &req);
+ if (err)
+ return err;
+
+ host->i_ctime = ubifs_current_time(host);
+ host_ui->xattr_cnt -= 1;
+ spin_lock(&host->i_lock);
+ host_ui->xattr_size -= CALC_DENT_SIZE(nm->len);
+ host_ui->xattr_size -= CALC_XATTR_BYTES(ui->data_len);
+ spin_unlock(&host->i_lock);
+ host_ui->xattr_names -= nm->len;
+
+ err = ubifs_jnl_delete_xattr(c, host, inode, nm, IS_DIRSYNC(host));
+ if (err)
+ goto out_cancel;
+
+ ubifs_release_ino_clean(c, host, &req);
+ return 0;
+
+out_cancel:
+ ubifs_cancel_ino_op(c, host, &req);
+ host_ui->xattr_cnt += 1;
+ spin_lock(&host->i_lock);
+ host_ui->xattr_size += CALC_DENT_SIZE(nm->len);
+ host_ui->xattr_size += CALC_XATTR_BYTES(ui->data_len);
+ spin_unlock(&host->i_lock);
+ make_bad_inode(inode);
+ return err;
+}
+
+int ubifs_removexattr(struct dentry *dentry, const char *name)
+{
+ struct inode *inode, *host = dentry->d_inode;
+ struct ubifs_info *c = host->i_sb->s_fs_info;
+ struct qstr nm = { .name = name, .len = strlen(name) };
+ struct ubifs_dent_node *xent;
+ union ubifs_key key;
+ int err;
+
+ dbg_gen("xattr '%s', ino %lu ('%.*s')", name,
+ host->i_ino, dentry->d_name.len, dentry->d_name.name);
+ ubifs_assert(mutex_is_locked(&host->i_mutex));
+ ubifs_assert(ubifs_inode(host)->xattr_cnt >= 0);
+ ubifs_assert(ubifs_inode(host)->xattr_size >= 0);
+ ubifs_assert(ubifs_inode(host)->xattr_names >= 0);
+
+ err = check_namespace(&nm);
+ if (err < 0)
+ return err;
+
+ xent = kmalloc(UBIFS_MAX_XENT_NODE_SZ, GFP_NOFS);
+ if (!xent)
+ return -ENOMEM;
+
+ xent_key_init(c, &key, host->i_ino, &nm);
+ err = ubifs_tnc_lookup_nm(c, &key, xent, &nm);
+ if (err) {
+ if (err == -ENOENT)
+ err = -ENODATA;
+ goto out_free;
+ }
+
+ inode = ubifs_iget(c->vfs_sb, le64_to_cpu(xent->inum));
+ if (IS_ERR(inode)) {
+ ubifs_err("dead extended attribute node entry");
+ ubifs_ro_mode(c, err);
+ err = PTR_ERR(inode);
+ goto out_free;
+ }
+
+ ubifs_assert(inode->i_nlink == 1);
+ inode->i_nlink = 0;
+ err = remove_xattr(c, host, inode, &nm);
+ if (err)
+ inode->i_nlink = 1;
+
+ /* If @i_nlink is 0, 'iput()' will delete the inode */
+ iput(inode);
+
+out_free:
+ kfree(xent);
+ return err;
+}
diff --exclude=.git -urN linux-2.6.25.6/include/asm-arm/arch-at91/at91_ecc.h avr32-2.6/include/asm-arm/arch-at91/at91_ecc.h
--- linux-2.6.25.6/include/asm-arm/arch-at91/at91_ecc.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-arm/arch-at91/at91_ecc.h 1970-01-01 01:00:00.000000000 +0100
@@ -1,38 +0,0 @@
-/*
- * include/asm-arm/arch-at91/at91_ecc.h
- *
- * Error Corrected Code Controller (ECC) - System peripherals regsters.
- * Based on AT91SAM9260 datasheet revision B.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#ifndef AT91_ECC_H
-#define AT91_ECC_H
-
-#define AT91_ECC_CR (AT91_ECC + 0x00) /* Control register */
-#define AT91_ECC_RST (1 << 0) /* Reset parity */
-
-#define AT91_ECC_MR (AT91_ECC + 0x04) /* Mode register */
-#define AT91_ECC_PAGESIZE (3 << 0) /* Page Size */
-#define AT91_ECC_PAGESIZE_528 (0)
-#define AT91_ECC_PAGESIZE_1056 (1)
-#define AT91_ECC_PAGESIZE_2112 (2)
-#define AT91_ECC_PAGESIZE_4224 (3)
-
-#define AT91_ECC_SR (AT91_ECC + 0x08) /* Status register */
-#define AT91_ECC_RECERR (1 << 0) /* Recoverable Error */
-#define AT91_ECC_ECCERR (1 << 1) /* ECC Single Bit Error */
-#define AT91_ECC_MULERR (1 << 2) /* Multiple Errors */
-
-#define AT91_ECC_PR (AT91_ECC + 0x0c) /* Parity register */
-#define AT91_ECC_BITADDR (0xf << 0) /* Bit Error Address */
-#define AT91_ECC_WORDADDR (0xfff << 4) /* Word Error Address */
-
-#define AT91_ECC_NPR (AT91_ECC + 0x10) /* NParity register */
-#define AT91_ECC_NPARITY (0xffff << 0) /* NParity */
-
-#endif
diff --exclude=.git -urN linux-2.6.25.6/include/asm-arm/arch-at91/board.h avr32-2.6/include/asm-arm/arch-at91/board.h
--- linux-2.6.25.6/include/asm-arm/arch-at91/board.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-arm/arch-at91/board.h 2008-06-12 15:09:45.803815435 +0200
@@ -85,7 +85,7 @@
extern void __init at91_add_device_usbh(struct at91_usbh_data *data);
/* NAND / SmartMedia */
-struct at91_nand_data {
+struct atmel_nand_data {
u8 enable_pin; /* chip enable */
u8 det_pin; /* card detect */
u8 rdy_pin; /* ready/busy */
@@ -94,7 +94,7 @@
u8 bus_width_16; /* buswidth is 16 bit */
struct mtd_partition* (*partition_info)(int, int*);
};
-extern void __init at91_add_device_nand(struct at91_nand_data *data);
+extern void __init at91_add_device_nand(struct atmel_nand_data *data);
/* I2C*/
extern void __init at91_add_device_i2c(struct i2c_board_info *devices, int nr_devices);
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/arch-at32ap/board.h avr32-2.6/include/asm-avr32/arch-at32ap/board.h
--- linux-2.6.25.6/include/asm-avr32/arch-at32ap/board.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-avr32/arch-at32ap/board.h 2008-06-12 15:09:45.855816193 +0200
@@ -8,6 +8,12 @@
#define GPIO_PIN_NONE (-1)
+/*
+ * Clock rates for various on-board oscillators. The number of entries
+ * in this array is chip-dependent.
+ */
+extern unsigned long at32_board_osc_rates[];
+
/* Add basic devices: system manager, interrupt controller, portmuxes, etc. */
void at32_add_system_devices(void);
@@ -36,11 +42,10 @@
struct atmel_lcdfb_info;
struct platform_device *
at32_add_device_lcdc(unsigned int id, struct atmel_lcdfb_info *data,
- unsigned long fbmem_start, unsigned long fbmem_len);
+ unsigned long fbmem_start, unsigned long fbmem_len,
+ unsigned int pin_config);
-struct usba_platform_data {
- int vbus_pin;
-};
+struct usba_platform_data;
struct platform_device *
at32_add_device_usba(unsigned int id, struct usba_platform_data *data);
@@ -68,8 +73,17 @@
struct platform_device *
at32_add_device_ssc(unsigned int id, unsigned int flags);
-struct platform_device *at32_add_device_twi(unsigned int id);
-struct platform_device *at32_add_device_mci(unsigned int id);
+struct i2c_board_info;
+struct platform_device *at32_add_device_twi(unsigned int id,
+ struct i2c_board_info *b,
+ unsigned int n);
+
+struct mci_platform_data {
+ int detect_pin;
+ int wp_pin;
+};
+struct platform_device *
+at32_add_device_mci(unsigned int id, struct mci_platform_data *data);
struct platform_device *at32_add_device_ac97c(unsigned int id);
struct platform_device *at32_add_device_abdac(unsigned int id);
@@ -84,4 +98,20 @@
at32_add_device_cf(unsigned int id, unsigned int extint,
struct cf_platform_data *data);
+struct platform_device *
+at32_add_device_psif(unsigned int id);
+
+/* NAND / SmartMedia */
+struct atmel_nand_data {
+ int enable_pin; /* chip enable */
+ int det_pin; /* card detect */
+ int rdy_pin; /* ready/busy */
+ u8 ale; /* address line number connected to ALE */
+ u8 cle; /* address line number connected to CLE */
+ u8 bus_width_16; /* buswidth is 16 bit */
+ struct mtd_partition *(*partition_info)(int size, int *num_partitions);
+};
+struct platform_device *
+at32_add_device_nand(unsigned int id, struct atmel_nand_data *data);
+
#endif /* __ASM_ARCH_BOARD_H */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/arch-at32ap/init.h avr32-2.6/include/asm-avr32/arch-at32ap/init.h
--- linux-2.6.25.6/include/asm-avr32/arch-at32ap/init.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-avr32/arch-at32ap/init.h 2008-06-12 15:09:45.855816193 +0200
@@ -13,10 +13,6 @@
void setup_platform(void);
void setup_board(void);
-/* Called by setup_platform */
-void at32_clock_init(void);
-void at32_portmux_init(void);
-
void at32_setup_serial_console(unsigned int usart_id);
#endif /* __ASM_AVR32_AT32AP_INIT_H__ */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/arch-at32ap/pm.h avr32-2.6/include/asm-avr32/arch-at32ap/pm.h
--- linux-2.6.25.6/include/asm-avr32/arch-at32ap/pm.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/include/asm-avr32/arch-at32ap/pm.h 2008-06-12 15:09:45.855816193 +0200
@@ -0,0 +1,51 @@
+/*
+ * AVR32 AP Power Management.
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_AVR32_ARCH_PM_H
+#define __ASM_AVR32_ARCH_PM_H
+
+/* Possible arguments to the "sleep" instruction */
+#define CPU_SLEEP_IDLE 0
+#define CPU_SLEEP_FROZEN 1
+#define CPU_SLEEP_STANDBY 2
+#define CPU_SLEEP_STOP 3
+#define CPU_SLEEP_STATIC 5
+
+#ifndef __ASSEMBLY__
+extern void cpu_enter_idle(void);
+extern void cpu_enter_standby(unsigned long sdramc_base);
+
+extern bool disable_idle_sleep;
+
+static inline void cpu_disable_idle_sleep(void)
+{
+ disable_idle_sleep = true;
+}
+
+static inline void cpu_enable_idle_sleep(void)
+{
+ disable_idle_sleep = false;
+}
+
+static inline void cpu_idle_sleep(void)
+{
+ /*
+ * If we're using the COUNT and COMPARE registers for
+ * timekeeping, we can't use the IDLE state.
+ */
+ if (disable_idle_sleep)
+ cpu_relax();
+ else
+ cpu_enter_idle();
+}
+
+void intc_set_suspend_handler(unsigned long offset);
+#endif
+
+#endif /* __ASM_AVR32_ARCH_PM_H */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/arch-at32ap/portmux.h avr32-2.6/include/asm-avr32/arch-at32ap/portmux.h
--- linux-2.6.25.6/include/asm-avr32/arch-at32ap/portmux.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-avr32/arch-at32ap/portmux.h 2008-06-12 15:09:45.859816144 +0200
@@ -26,4 +26,16 @@
void at32_select_gpio(unsigned int pin, unsigned long flags);
void at32_reserve_pin(unsigned int pin);
+#ifdef CONFIG_GPIO_DEV
+
+/* Gang allocators and accessors; used by the GPIO /dev driver */
+int at32_gpio_port_is_valid(unsigned int port);
+int at32_select_gpio_pins(unsigned int port, u32 pins, u32 oe_mask);
+void at32_deselect_pins(unsigned int port, u32 pins);
+
+u32 at32_gpio_get_value_multiple(unsigned int port, u32 pins);
+void at32_gpio_set_value_multiple(unsigned int port, u32 value, u32 mask);
+
+#endif /* CONFIG_GPIO_DEV */
+
#endif /* __ASM_ARCH_PORTMUX_H__ */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/arch-at32ap/sram.h avr32-2.6/include/asm-avr32/arch-at32ap/sram.h
--- linux-2.6.25.6/include/asm-avr32/arch-at32ap/sram.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/include/asm-avr32/arch-at32ap/sram.h 2008-06-12 15:09:45.859816144 +0200
@@ -0,0 +1,30 @@
+/*
+ * Simple SRAM allocator
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_AVR32_ARCH_SRAM_H
+#define __ASM_AVR32_ARCH_SRAM_H
+
+#include <linux/genalloc.h>
+
+extern struct gen_pool *sram_pool;
+
+static inline unsigned long sram_alloc(size_t len)
+{
+ if (!sram_pool)
+ return 0UL;
+
+ return gen_pool_alloc(sram_pool, len);
+}
+
+static inline void sram_free(unsigned long addr, size_t len)
+{
+ return gen_pool_free(sram_pool, addr, len);
+}
+
+#endif /* __ASM_AVR32_ARCH_SRAM_H */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/arch-at32ap/time.h avr32-2.6/include/asm-avr32/arch-at32ap/time.h
--- linux-2.6.25.6/include/asm-avr32/arch-at32ap/time.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-avr32/arch-at32ap/time.h 1970-01-01 01:00:00.000000000 +0100
@@ -1,112 +0,0 @@
-/*
- * Copyright (C) 2007 Atmel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef _ASM_AVR32_ARCH_AT32AP_TIME_H
-#define _ASM_AVR32_ARCH_AT32AP_TIME_H
-
-#include <linux/platform_device.h>
-
-extern struct irqaction timer_irqaction;
-extern struct platform_device at32_systc0_device;
-extern void local_timer_interrupt(int irq, void *dev_id);
-
-#define TIMER_BCR 0x000000c0
-#define TIMER_BCR_SYNC 0
-#define TIMER_BMR 0x000000c4
-#define TIMER_BMR_TC0XC0S 0
-#define TIMER_BMR_TC1XC1S 2
-#define TIMER_BMR_TC2XC2S 4
-#define TIMER_CCR 0x00000000
-#define TIMER_CCR_CLKDIS 1
-#define TIMER_CCR_CLKEN 0
-#define TIMER_CCR_SWTRG 2
-#define TIMER_CMR 0x00000004
-#define TIMER_CMR_ABETRG 10
-#define TIMER_CMR_ACPA 16
-#define TIMER_CMR_ACPC 18
-#define TIMER_CMR_AEEVT 20
-#define TIMER_CMR_ASWTRG 22
-#define TIMER_CMR_BCPB 24
-#define TIMER_CMR_BCPC 26
-#define TIMER_CMR_BEEVT 28
-#define TIMER_CMR_BSWTRG 30
-#define TIMER_CMR_BURST 4
-#define TIMER_CMR_CLKI 3
-#define TIMER_CMR_CPCDIS 7
-#define TIMER_CMR_CPCSTOP 6
-#define TIMER_CMR_CPCTRG 14
-#define TIMER_CMR_EEVT 10
-#define TIMER_CMR_EEVTEDG 8
-#define TIMER_CMR_ENETRG 12
-#define TIMER_CMR_ETRGEDG 8
-#define TIMER_CMR_LDBDIS 7
-#define TIMER_CMR_LDBSTOP 6
-#define TIMER_CMR_LDRA 16
-#define TIMER_CMR_LDRB 18
-#define TIMER_CMR_TCCLKS 0
-#define TIMER_CMR_WAVE 15
-#define TIMER_CMR_WAVSEL 13
-#define TIMER_CV 0x00000010
-#define TIMER_CV_CV 0
-#define TIMER_IDR 0x00000028
-#define TIMER_IDR_COVFS 0
-#define TIMER_IDR_CPAS 2
-#define TIMER_IDR_CPBS 3
-#define TIMER_IDR_CPCS 4
-#define TIMER_IDR_ETRGS 7
-#define TIMER_IDR_LDRAS 5
-#define TIMER_IDR_LDRBS 6
-#define TIMER_IDR_LOVRS 1
-#define TIMER_IER 0x00000024
-#define TIMER_IER_COVFS 0
-#define TIMER_IER_CPAS 2
-#define TIMER_IER_CPBS 3
-#define TIMER_IER_CPCS 4
-#define TIMER_IER_ETRGS 7
-#define TIMER_IER_LDRAS 5
-#define TIMER_IER_LDRBS 6
-#define TIMER_IER_LOVRS 1
-#define TIMER_IMR 0x0000002c
-#define TIMER_IMR_COVFS 0
-#define TIMER_IMR_CPAS 2
-#define TIMER_IMR_CPBS 3
-#define TIMER_IMR_CPCS 4
-#define TIMER_IMR_ETRGS 7
-#define TIMER_IMR_LDRAS 5
-#define TIMER_IMR_LDRBS 6
-#define TIMER_IMR_LOVRS 1
-#define TIMER_RA 0x00000014
-#define TIMER_RA_RA 0
-#define TIMER_RB 0x00000018
-#define TIMER_RB_RB 0
-#define TIMER_RC 0x0000001c
-#define TIMER_RC_RC 0
-#define TIMER_SR 0x00000020
-#define TIMER_SR_CLKSTA 16
-#define TIMER_SR_COVFS 0
-#define TIMER_SR_CPAS 2
-#define TIMER_SR_CPBS 3
-#define TIMER_SR_CPCS 4
-#define TIMER_SR_ETRGS 7
-#define TIMER_SR_LDRAS 5
-#define TIMER_SR_LDRBS 6
-#define TIMER_SR_LOVRS 1
-#define TIMER_SR_MTIOA 17
-#define TIMER_SR_MTIOB 18
-
-/* Bit manipulation macros */
-#define TIMER_BIT(name) (1 << TIMER_##name)
-#define TIMER_BF(name,value) ((value) << TIMER_##name)
-
-/* Register access macros */
-#define timer_read(port,instance,reg) \
- __raw_readl(port + (0x40 * instance) + TIMER_##reg)
-#define timer_write(port,instance,reg,value) \
- __raw_writel((value), port + (0x40 * instance) + TIMER_##reg)
-
-#endif /* _ASM_AVR32_ARCH_AT32AP_TIME_H */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/asm.h avr32-2.6/include/asm-avr32/asm.h
--- linux-2.6.25.6/include/asm-avr32/asm.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-avr32/asm.h 2008-06-12 15:04:04.683816631 +0200
@@ -12,10 +12,10 @@
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
-#define mask_interrupts ssrf SR_GM_BIT
-#define mask_exceptions ssrf SR_EM_BIT
-#define unmask_interrupts csrf SR_GM_BIT
-#define unmask_exceptions csrf SR_EM_BIT
+#define mask_interrupts ssrf SYSREG_GM_OFFSET
+#define mask_exceptions ssrf SYSREG_EM_OFFSET
+#define unmask_interrupts csrf SYSREG_GM_OFFSET
+#define unmask_exceptions csrf SYSREG_EM_OFFSET
#ifdef CONFIG_FRAME_POINTER
.macro save_fp
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/dma-controller.h avr32-2.6/include/asm-avr32/dma-controller.h
--- linux-2.6.25.6/include/asm-avr32/dma-controller.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/include/asm-avr32/dma-controller.h 2008-06-12 15:09:45.859816144 +0200
@@ -0,0 +1,166 @@
+/*
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_AVR32_DMA_CONTROLLER_H
+#define __ASM_AVR32_DMA_CONTROLLER_H
+
+#include <linux/device.h>
+
+#define DMA_DIR_MEM_TO_MEM 0x0000
+#define DMA_DIR_MEM_TO_PERIPH 0x0001
+#define DMA_DIR_PERIPH_TO_MEM 0x0002
+#define DMA_DIR_PERIPH_TO_PERIPH 0x0003
+
+#define DMA_WIDTH_8BIT 0
+#define DMA_WIDTH_16BIT 1
+#define DMA_WIDTH_32BIT 2
+
+struct dma_request {
+ struct dma_controller *dmac;
+ struct list_head list;
+
+ unsigned short channel;
+
+ void (*xfer_complete)(struct dma_request *req);
+ void (*block_complete)(struct dma_request *req);
+ void (*error)(struct dma_request *req);
+};
+
+struct dma_request_sg {
+ struct dma_request req;
+
+ int nr_sg;
+ struct scatterlist *sg;
+ unsigned long block_size;
+ unsigned int nr_blocks;
+
+ dma_addr_t data_reg;
+ unsigned short periph_id;
+
+ unsigned char direction;
+ unsigned char width;
+};
+#define to_dma_request_sg(_req) \
+ container_of(_req, struct dma_request_sg, req)
+
+struct dma_request_cyclic {
+ struct dma_request req;
+
+ int periods;
+ unsigned long buffer_size;
+
+ dma_addr_t buffer_start;
+ dma_addr_t data_reg;
+
+ unsigned short periph_id;
+ unsigned char direction;
+ unsigned char width;
+
+ void *dev_id;
+};
+#define to_dma_request_cyclic(_req) \
+ container_of(_req, struct dma_request_cyclic, req)
+
+struct dma_request_memcpy {
+ struct dma_request req;
+
+ dma_addr_t src_addr;
+ unsigned int src_width;
+ unsigned int src_stride;
+
+ dma_addr_t dst_addr;
+ unsigned int dst_width;
+ unsigned int dst_stride;
+
+ size_t length;
+
+ unsigned short src_reverse:1;
+ unsigned short dst_reverse:1;
+};
+#define to_dma_request_memcpy(_req) \
+ container_of(_req, struct dma_request_memcpy, req)
+
+struct dma_controller {
+ struct list_head list;
+ int id;
+ struct device *dev;
+
+ int (*alloc_channel)(struct dma_controller *dmac);
+ void (*release_channel)(struct dma_controller *dmac,
+ int channel);
+ int (*prepare_request_sg)(struct dma_controller *dmac,
+ struct dma_request_sg *req);
+ int (*prepare_request_cyclic)(struct dma_controller *dmac,
+ struct dma_request_cyclic *req);
+ int (*prepare_request_memcpy)(struct dma_controller *dmac,
+ struct dma_request_memcpy *req);
+ int (*start_request)(struct dma_controller *dmac,
+ unsigned int channel);
+ int (*stop_request)(struct dma_controller *dmac,
+ unsigned int channel);
+ dma_addr_t (*get_current_pos)(struct dma_controller *dmac,
+ unsigned int channel);
+};
+
+static inline int
+dma_alloc_channel(struct dma_controller *dmac)
+{
+ return dmac->alloc_channel(dmac);
+}
+
+static inline void
+dma_release_channel(struct dma_controller *dmac, int chan)
+{
+ dmac->release_channel(dmac, chan);
+}
+
+static inline int
+dma_prepare_request_sg(struct dma_controller *dmac,
+ struct dma_request_sg *req)
+{
+ return dmac->prepare_request_sg(dmac, req);
+}
+
+static inline int
+dma_prepare_request_cyclic(struct dma_controller *dmac,
+ struct dma_request_cyclic *req)
+{
+ return dmac->prepare_request_cyclic(dmac, req);
+}
+
+static inline int
+dma_prepare_request_memcpy(struct dma_controller *dmac,
+ struct dma_request_memcpy *req)
+{
+ return dmac->prepare_request_memcpy(dmac, req);
+}
+
+static inline int
+dma_start_request(struct dma_controller *dmac,
+ unsigned int channel)
+{
+ return dmac->start_request(dmac, channel);
+}
+
+static inline int
+dma_stop_request(struct dma_controller *dmac,
+ unsigned int channel)
+{
+ return dmac->stop_request(dmac, channel);
+}
+
+static inline dma_addr_t
+dma_get_current_pos(struct dma_controller *dmac,
+ unsigned int channel)
+{
+ return dmac->get_current_pos(dmac, channel);
+}
+
+extern int register_dma_controller(struct dma_controller *dmac);
+extern struct dma_controller *find_dma_controller(int id);
+
+#endif /* __ASM_AVR32_DMA_CONTROLLER_H */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/intc.h avr32-2.6/include/asm-avr32/intc.h
--- linux-2.6.25.6/include/asm-avr32/intc.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-avr32/intc.h 1970-01-01 01:00:00.000000000 +0100
@@ -1,128 +0,0 @@
-#ifndef __ASM_AVR32_INTC_H
-#define __ASM_AVR32_INTC_H
-
-#include <linux/sysdev.h>
-#include <linux/interrupt.h>
-
-struct irq_controller;
-struct irqaction;
-struct pt_regs;
-
-struct platform_device;
-
-/* Information about the internal interrupt controller */
-struct intc_device {
- /* ioremapped address of configuration block */
- void __iomem *regs;
-
- /* the physical device */
- struct platform_device *pdev;
-
- /* Number of interrupt lines per group. */
- unsigned int irqs_per_group;
-
- /* The highest group ID + 1 */
- unsigned int nr_groups;
-
- /*
- * Bitfield indicating which groups are actually in use. The
- * size of the array is
- * ceil(group_max / (8 * sizeof(unsigned int))).
- */
- unsigned int group_mask[];
-};
-
-struct irq_controller_class {
- /*
- * A short name identifying this kind of controller.
- */
- const char *typename;
- /*
- * Handle the IRQ. Must do any necessary acking and masking.
- */
- irqreturn_t (*handle)(int irq, void *dev_id, struct pt_regs *regs);
- /*
- * Register a new IRQ handler.
- */
- int (*setup)(struct irq_controller *ctrl, unsigned int irq,
- struct irqaction *action);
- /*
- * Unregister a IRQ handler.
- */
- void (*free)(struct irq_controller *ctrl, unsigned int irq,
- void *dev_id);
- /*
- * Mask the IRQ in the interrupt controller.
- */
- void (*mask)(struct irq_controller *ctrl, unsigned int irq);
- /*
- * Unmask the IRQ in the interrupt controller.
- */
- void (*unmask)(struct irq_controller *ctrl, unsigned int irq);
- /*
- * Set the type of the IRQ. See below for possible types.
- * Return -EINVAL if a given type is not supported
- */
- int (*set_type)(struct irq_controller *ctrl, unsigned int irq,
- unsigned int type);
- /*
- * Return the IRQ type currently set
- */
- unsigned int (*get_type)(struct irq_controller *ctrl, unsigned int irq);
-};
-
-struct irq_controller {
- struct irq_controller_class *class;
- unsigned int irq_group;
- unsigned int first_irq;
- unsigned int nr_irqs;
- struct list_head list;
-};
-
-struct intc_group_desc {
- struct irq_controller *ctrl;
- irqreturn_t (*handle)(int, void *, struct pt_regs *);
- unsigned long flags;
- void *dev_id;
- const char *devname;
-};
-
-/*
- * The internal interrupt controller. Defined in board/part-specific
- * devices.c.
- * TODO: Should probably be defined per-cpu.
- */
-extern struct intc_device intc;
-
-extern int request_internal_irq(unsigned int irq,
- irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long irqflags,
- const char *devname, void *dev_id);
-extern void free_internal_irq(unsigned int irq);
-
-/* Only used by time_init() */
-extern int setup_internal_irq(unsigned int irq, struct intc_group_desc *desc);
-
-/*
- * Set interrupt priority for a given group. `group' can be found by
- * using irq_to_group(irq). Priority can be from 0 (lowest) to 3
- * (highest). Higher-priority interrupts will preempt lower-priority
- * interrupts (unless interrupts are masked globally).
- *
- * This function does not check for conflicts within a group.
- */
-extern int intc_set_priority(unsigned int group,
- unsigned int priority);
-
-/*
- * Returns a bitmask of pending interrupts in a group.
- */
-extern unsigned long intc_get_pending(unsigned int group);
-
-/*
- * Register a new external interrupt controller. Returns the first
- * external IRQ number that is assigned to the new controller.
- */
-extern int intc_register_controller(struct irq_controller *ctrl);
-
-#endif /* __ASM_AVR32_INTC_H */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/irq.h avr32-2.6/include/asm-avr32/irq.h
--- linux-2.6.25.6/include/asm-avr32/irq.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-avr32/irq.h 2008-06-12 15:04:04.687816302 +0200
@@ -14,6 +14,11 @@
#ifndef __ASSEMBLER__
int nmi_enable(void);
void nmi_disable(void);
+
+/*
+ * Returns a bitmask of pending interrupts in a group.
+ */
+extern unsigned long intc_get_pending(unsigned int group);
#endif
#endif /* __ASM_AVR32_IOCTLS_H */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/page.h avr32-2.6/include/asm-avr32/page.h
--- linux-2.6.25.6/include/asm-avr32/page.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-avr32/page.h 2008-06-12 15:04:04.691816253 +0200
@@ -8,13 +8,11 @@
#ifndef __ASM_AVR32_PAGE_H
#define __ASM_AVR32_PAGE_H
+#include <linux/const.h>
+
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
-#ifdef __ASSEMBLY__
-#define PAGE_SIZE (1 << PAGE_SHIFT)
-#else
-#define PAGE_SIZE (1UL << PAGE_SHIFT)
-#endif
+#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#define PTE_MASK PAGE_MASK
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/pci.h avr32-2.6/include/asm-avr32/pci.h
--- linux-2.6.25.6/include/asm-avr32/pci.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-avr32/pci.h 2008-06-12 15:09:45.859816144 +0200
@@ -5,4 +5,6 @@
#define PCI_DMA_BUS_IS_PHYS (1)
+#include <asm-generic/pci-dma-compat.h>
+
#endif /* __ASM_AVR32_PCI_H__ */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/serial.h avr32-2.6/include/asm-avr32/serial.h
--- linux-2.6.25.6/include/asm-avr32/serial.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/include/asm-avr32/serial.h 2008-06-12 15:04:04.695816483 +0200
@@ -0,0 +1,13 @@
+#ifndef _ASM_SERIAL_H
+#define _ASM_SERIAL_H
+
+/*
+ * This assumes you have a 1.8432 MHz clock for your UART.
+ *
+ * It'd be nice if someone built a serial card with a 24.576 MHz
+ * clock, since the 16550A is capable of handling a top speed of 1.5
+ * megabits/second; but this requires the faster clock.
+ */
+#define BASE_BAUD (1843200 / 16)
+
+#endif /* _ASM_SERIAL_H */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/thread_info.h avr32-2.6/include/asm-avr32/thread_info.h
--- linux-2.6.25.6/include/asm-avr32/thread_info.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/asm-avr32/thread_info.h 2008-06-12 15:09:45.859816144 +0200
@@ -88,6 +88,7 @@
#define TIF_MEMDIE 6
#define TIF_RESTORE_SIGMASK 7 /* restore signal mask in do_signal */
#define TIF_CPU_GOING_TO_SLEEP 8 /* CPU is entering sleep 0 mode */
+#define TIF_FREEZE 29
#define TIF_DEBUG 30 /* debugging enabled */
#define TIF_USERSPACE 31 /* true if FS sets userspace */
diff --exclude=.git -urN linux-2.6.25.6/include/asm-avr32/xor.h avr32-2.6/include/asm-avr32/xor.h
--- linux-2.6.25.6/include/asm-avr32/xor.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/include/asm-avr32/xor.h 2008-06-12 15:04:04.707817453 +0200
@@ -0,0 +1,6 @@
+#ifndef _ASM_XOR_H
+#define _ASM_XOR_H
+
+#include <asm-generic/xor.h>
+
+#endif
diff --exclude=.git -urN linux-2.6.25.6/include/linux/atmel_tc.h avr32-2.6/include/linux/atmel_tc.h
--- linux-2.6.25.6/include/linux/atmel_tc.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/include/linux/atmel_tc.h 2008-06-12 15:04:07.586819080 +0200
@@ -0,0 +1,252 @@
+/*
+ * Timer/Counter Unit (TC) registers.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef ATMEL_TC_H
+#define ATMEL_TC_H
+
+#include <linux/compiler.h>
+#include <linux/list.h>
+
+/*
+ * Many 32-bit Atmel SOCs include one or more TC blocks, each of which holds
+ * three general-purpose 16-bit timers. These timers share one register bank.
+ * Depending on the SOC, each timer may have its own clock and IRQ, or those
+ * may be shared by the whole TC block.
+ *
+ * These TC blocks may have up to nine external pins: TCLK0..2 signals for
+ * clocks or clock gates, and per-timer TIOA and TIOB signals used for PWM
+ * or triggering. Those pins need to be set up for use with the TC block,
+ * else they will be used as GPIOs or for a different controller.
+ *
+ * Although we expect each TC block to have a platform_device node, those
+ * nodes are not what drivers bind to. Instead, they ask for a specific
+ * TC block, by number ... which is a common approach on systems with many
+ * timers. Then they use clk_get() and platform_get_irq() to get clock and
+ * IRQ resources.
+ */
+
+struct clk;
+
+/**
+ * struct atmel_tc - information about a Timer/Counter Block
+ * @pdev: physical device
+ * @iomem: resource associated with the I/O register
+ * @regs: mapping through which the I/O registers can be accessed
+ * @irq: irq for each of the three channels
+ * @clk: internal clock source for each of the three channels
+ * @node: list node, for tclib internal use
+ *
+ * On some platforms, each TC channel has its own clocks and IRQs,
+ * while on others, all TC channels share the same clock and IRQ.
+ * Drivers should clk_enable() all the clocks they need even though
+ * all the entries in @clk may point to the same physical clock.
+ * Likewise, drivers should request irqs independently for each
+ * channel, but they must use IRQF_SHARED in case some of the entries
+ * in @irq are actually the same IRQ.
+ */
+struct atmel_tc {
+ struct platform_device *pdev;
+ struct resource *iomem;
+ void __iomem *regs;
+ int irq[3];
+ struct clk *clk[3];
+ struct list_head node;
+};
+
+extern struct atmel_tc *atmel_tc_alloc(unsigned block, const char *name);
+extern void atmel_tc_free(struct atmel_tc *tc);
+
+/* platform-specific ATMEL_TC_TIMER_CLOCKx divisors (0 means 32KiHz) */
+extern const u8 atmel_tc_divisors[5];
+
+
+/*
+ * Two registers have block-wide controls. These are: configuring the three
+ * "external" clocks (or event sources) used by the timer channels; and
+ * synchronizing the timers by resetting them all at once.
+ *
+ * "External" can mean "external to chip" using the TCLK0, TCLK1, or TCLK2
+ * signals. Or, it can mean "external to timer", using the TIOA output from
+ * one of the other two timers that's being run in waveform mode.
+ */
+
+#define ATMEL_TC_BCR 0xc0 /* TC Block Control Register */
+#define ATMEL_TC_SYNC (1 << 0) /* synchronize timers */
+
+#define ATMEL_TC_BMR 0xc4 /* TC Block Mode Register */
+#define ATMEL_TC_TC0XC0S (3 << 0) /* external clock 0 source */
+#define ATMEL_TC_TC0XC0S_TCLK0 (0 << 0)
+#define ATMEL_TC_TC0XC0S_NONE (1 << 0)
+#define ATMEL_TC_TC0XC0S_TIOA1 (2 << 0)
+#define ATMEL_TC_TC0XC0S_TIOA2 (3 << 0)
+#define ATMEL_TC_TC1XC1S (3 << 2) /* external clock 1 source */
+#define ATMEL_TC_TC1XC1S_TCLK1 (0 << 2)
+#define ATMEL_TC_TC1XC1S_NONE (1 << 2)
+#define ATMEL_TC_TC1XC1S_TIOA0 (2 << 2)
+#define ATMEL_TC_TC1XC1S_TIOA2 (3 << 2)
+#define ATMEL_TC_TC2XC2S (3 << 4) /* external clock 2 source */
+#define ATMEL_TC_TC2XC2S_TCLK2 (0 << 4)
+#define ATMEL_TC_TC2XC2S_NONE (1 << 4)
+#define ATMEL_TC_TC2XC2S_TIOA0 (2 << 4)
+#define ATMEL_TC_TC2XC2S_TIOA1 (3 << 4)
+
+
+/*
+ * Each TC block has three "channels", each with one counter and controls.
+ *
+ * Note that the semantics of ATMEL_TC_TIMER_CLOCKx (input clock selection
+ * when it's not "external") is silicon-specific. AT91 platforms use one
+ * set of definitions; AVR32 platforms use a different set. Don't hard-wire
+ * such knowledge into your code, use the global "atmel_tc_divisors" ...
+ * where index N is the divisor for clock N+1, else zero to indicate it uses
+ * the 32 KiHz clock.
+ *
+ * The timers can be chained in various ways, and operated in "waveform"
+ * generation mode (including PWM) or "capture" mode (to time events). In
+ * both modes, behavior can be configured in many ways.
+ *
+ * Each timer has two I/O pins, TIOA and TIOB. Waveform mode uses TIOA as a
+ * PWM output, and TIOB as either another PWM or as a trigger. Capture mode
+ * uses them only as inputs.
+ */
+#define ATMEL_TC_CHAN(idx) ((idx)*0x40)
+#define ATMEL_TC_REG(idx, reg) (ATMEL_TC_CHAN(idx) + ATMEL_TC_ ## reg)
+
+#define ATMEL_TC_CCR 0x00 /* Channel Control Register */
+#define ATMEL_TC_CLKEN (1 << 0) /* clock enable */
+#define ATMEL_TC_CLKDIS (1 << 1) /* clock disable */
+#define ATMEL_TC_SWTRG (1 << 2) /* software trigger */
+
+#define ATMEL_TC_CMR 0x04 /* Channel Mode Register */
+
+/* Both modes share some CMR bits */
+#define ATMEL_TC_TCCLKS (7 << 0) /* clock source */
+#define ATMEL_TC_TIMER_CLOCK1 (0 << 0)
+#define ATMEL_TC_TIMER_CLOCK2 (1 << 0)
+#define ATMEL_TC_TIMER_CLOCK3 (2 << 0)
+#define ATMEL_TC_TIMER_CLOCK4 (3 << 0)
+#define ATMEL_TC_TIMER_CLOCK5 (4 << 0)
+#define ATMEL_TC_XC0 (5 << 0)
+#define ATMEL_TC_XC1 (6 << 0)
+#define ATMEL_TC_XC2 (7 << 0)
+#define ATMEL_TC_CLKI (1 << 3) /* clock invert */
+#define ATMEL_TC_BURST (3 << 4) /* clock gating */
+#define ATMEL_TC_GATE_NONE (0 << 4)
+#define ATMEL_TC_GATE_XC0 (1 << 4)
+#define ATMEL_TC_GATE_XC1 (2 << 4)
+#define ATMEL_TC_GATE_XC2 (3 << 4)
+#define ATMEL_TC_WAVE (1 << 15) /* true = Waveform mode */
+
+/* CAPTURE mode CMR bits */
+#define ATMEL_TC_LDBSTOP (1 << 6) /* counter stops on RB load */
+#define ATMEL_TC_LDBDIS (1 << 7) /* counter disable on RB load */
+#define ATMEL_TC_ETRGEDG (3 << 8) /* external trigger edge */
+#define ATMEL_TC_ETRGEDG_NONE (0 << 8)
+#define ATMEL_TC_ETRGEDG_RISING (1 << 8)
+#define ATMEL_TC_ETRGEDG_FALLING (2 << 8)
+#define ATMEL_TC_ETRGEDG_BOTH (3 << 8)
+#define ATMEL_TC_ABETRG (1 << 10) /* external trigger is TIOA? */
+#define ATMEL_TC_CPCTRG (1 << 14) /* RC compare trigger enable */
+#define ATMEL_TC_LDRA (3 << 16) /* RA loading edge (of TIOA) */
+#define ATMEL_TC_LDRA_NONE (0 << 16)
+#define ATMEL_TC_LDRA_RISING (1 << 16)
+#define ATMEL_TC_LDRA_FALLING (2 << 16)
+#define ATMEL_TC_LDRA_BOTH (3 << 16)
+#define ATMEL_TC_LDRB (3 << 18) /* RB loading edge (of TIOA) */
+#define ATMEL_TC_LDRB_NONE (0 << 18)
+#define ATMEL_TC_LDRB_RISING (1 << 18)
+#define ATMEL_TC_LDRB_FALLING (2 << 18)
+#define ATMEL_TC_LDRB_BOTH (3 << 18)
+
+/* WAVEFORM mode CMR bits */
+#define ATMEL_TC_CPCSTOP (1 << 6) /* RC compare stops counter */
+#define ATMEL_TC_CPCDIS (1 << 7) /* RC compare disables counter */
+#define ATMEL_TC_EEVTEDG (3 << 8) /* external event edge */
+#define ATMEL_TC_EEVTEDG_NONE (0 << 8)
+#define ATMEL_TC_EEVTEDG_RISING (1 << 8)
+#define ATMEL_TC_EEVTEDG_FALLING (2 << 8)
+#define ATMEL_TC_EEVTEDG_BOTH (3 << 8)
+#define ATMEL_TC_EEVT (3 << 10) /* external event source */
+#define ATMEL_TC_EEVT_TIOB (0 << 10)
+#define ATMEL_TC_EEVT_XC0 (1 << 10)
+#define ATMEL_TC_EEVT_XC1 (2 << 10)
+#define ATMEL_TC_EEVT_XC2 (3 << 10)
+#define ATMEL_TC_ENETRG (1 << 12) /* external event is trigger */
+#define ATMEL_TC_WAVESEL (3 << 13) /* waveform type */
+#define ATMEL_TC_WAVESEL_UP (0 << 13)
+#define ATMEL_TC_WAVESEL_UPDOWN (1 << 13)
+#define ATMEL_TC_WAVESEL_UP_AUTO (2 << 13)
+#define ATMEL_TC_WAVESEL_UPDOWN_AUTO (3 << 13)
+#define ATMEL_TC_ACPA (3 << 16) /* RA compare changes TIOA */
+#define ATMEL_TC_ACPA_NONE (0 << 16)
+#define ATMEL_TC_ACPA_SET (1 << 16)
+#define ATMEL_TC_ACPA_CLEAR (2 << 16)
+#define ATMEL_TC_ACPA_TOGGLE (3 << 16)
+#define ATMEL_TC_ACPC (3 << 18) /* RC compare changes TIOA */
+#define ATMEL_TC_ACPC_NONE (0 << 18)
+#define ATMEL_TC_ACPC_SET (1 << 18)
+#define ATMEL_TC_ACPC_CLEAR (2 << 18)
+#define ATMEL_TC_ACPC_TOGGLE (3 << 18)
+#define ATMEL_TC_AEEVT (3 << 20) /* external event changes TIOA */
+#define ATMEL_TC_AEEVT_NONE (0 << 20)
+#define ATMEL_TC_AEEVT_SET (1 << 20)
+#define ATMEL_TC_AEEVT_CLEAR (2 << 20)
+#define ATMEL_TC_AEEVT_TOGGLE (3 << 20)
+#define ATMEL_TC_ASWTRG (3 << 22) /* software trigger changes TIOA */
+#define ATMEL_TC_ASWTRG_NONE (0 << 22)
+#define ATMEL_TC_ASWTRG_SET (1 << 22)
+#define ATMEL_TC_ASWTRG_CLEAR (2 << 22)
+#define ATMEL_TC_ASWTRG_TOGGLE (3 << 22)
+#define ATMEL_TC_BCPB (3 << 24) /* RB compare changes TIOB */
+#define ATMEL_TC_BCPB_NONE (0 << 24)
+#define ATMEL_TC_BCPB_SET (1 << 24)
+#define ATMEL_TC_BCPB_CLEAR (2 << 24)
+#define ATMEL_TC_BCPB_TOGGLE (3 << 24)
+#define ATMEL_TC_BCPC (3 << 26) /* RC compare changes TIOB */
+#define ATMEL_TC_BCPC_NONE (0 << 26)
+#define ATMEL_TC_BCPC_SET (1 << 26)
+#define ATMEL_TC_BCPC_CLEAR (2 << 26)
+#define ATMEL_TC_BCPC_TOGGLE (3 << 26)
+#define ATMEL_TC_BEEVT (3 << 28) /* external event changes TIOB */
+#define ATMEL_TC_BEEVT_NONE (0 << 28)
+#define ATMEL_TC_BEEVT_SET (1 << 28)
+#define ATMEL_TC_BEEVT_CLEAR (2 << 28)
+#define ATMEL_TC_BEEVT_TOGGLE (3 << 28)
+#define ATMEL_TC_BSWTRG (3 << 30) /* software trigger changes TIOB */
+#define ATMEL_TC_BSWTRG_NONE (0 << 30)
+#define ATMEL_TC_BSWTRG_SET (1 << 30)
+#define ATMEL_TC_BSWTRG_CLEAR (2 << 30)
+#define ATMEL_TC_BSWTRG_TOGGLE (3 << 30)
+
+#define ATMEL_TC_CV 0x10 /* counter Value */
+#define ATMEL_TC_RA 0x14 /* register A */
+#define ATMEL_TC_RB 0x18 /* register B */
+#define ATMEL_TC_RC 0x1c /* register C */
+
+#define ATMEL_TC_SR 0x20 /* status (read-only) */
+/* Status-only flags */
+#define ATMEL_TC_CLKSTA (1 << 16) /* clock enabled */
+#define ATMEL_TC_MTIOA (1 << 17) /* TIOA mirror */
+#define ATMEL_TC_MTIOB (1 << 18) /* TIOB mirror */
+
+#define ATMEL_TC_IER 0x24 /* interrupt enable (write-only) */
+#define ATMEL_TC_IDR 0x28 /* interrupt disable (write-only) */
+#define ATMEL_TC_IMR 0x2c /* interrupt mask (read-only) */
+
+/* Status and IRQ flags */
+#define ATMEL_TC_COVFS (1 << 0) /* counter overflow */
+#define ATMEL_TC_LOVRS (1 << 1) /* load overrun */
+#define ATMEL_TC_CPAS (1 << 2) /* RA compare */
+#define ATMEL_TC_CPBS (1 << 3) /* RB compare */
+#define ATMEL_TC_CPCS (1 << 4) /* RC compare */
+#define ATMEL_TC_LDRAS (1 << 5) /* RA loading */
+#define ATMEL_TC_LDRBS (1 << 6) /* RB loading */
+#define ATMEL_TC_ETRGS (1 << 7) /* external trigger */
+
+#endif
diff --exclude=.git -urN linux-2.6.25.6/include/linux/fs.h avr32-2.6/include/linux/fs.h
--- linux-2.6.25.6/include/linux/fs.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/linux/fs.h 2008-06-12 15:09:46.255815187 +0200
@@ -1691,6 +1691,8 @@
extern int invalidate_inode_pages2(struct address_space *mapping);
extern int invalidate_inode_pages2_range(struct address_space *mapping,
pgoff_t start, pgoff_t end);
+extern void generic_sync_sb_inodes(struct super_block *sb,
+ struct writeback_control *wbc);
extern int write_inode_now(struct inode *, int);
extern int filemap_fdatawrite(struct address_space *);
extern int filemap_flush(struct address_space *);
diff --exclude=.git -urN linux-2.6.25.6/include/linux/usb/atmel_usba_udc.h avr32-2.6/include/linux/usb/atmel_usba_udc.h
--- linux-2.6.25.6/include/linux/usb/atmel_usba_udc.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/include/linux/usb/atmel_usba_udc.h 2008-06-12 15:04:07.986816119 +0200
@@ -0,0 +1,22 @@
+/*
+ * Platform data definitions for Atmel USBA gadget driver.
+ */
+#ifndef __LINUX_USB_USBA_H
+#define __LINUX_USB_USBA_H
+
+struct usba_ep_data {
+ char *name;
+ int index;
+ int fifo_size;
+ int nr_banks;
+ int can_dma;
+ int can_isoc;
+};
+
+struct usba_platform_data {
+ int vbus_pin;
+ int num_ep;
+ struct usba_ep_data ep[0];
+};
+
+#endif /* __LINUX_USB_USBA_H */
diff --exclude=.git -urN linux-2.6.25.6/include/mtd/Kbuild avr32-2.6/include/mtd/Kbuild
--- linux-2.6.25.6/include/mtd/Kbuild 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/mtd/Kbuild 2008-06-12 15:04:08.018816005 +0200
@@ -3,5 +3,4 @@
header-y += mtd-abi.h
header-y += mtd-user.h
header-y += nftl-user.h
-header-y += ubi-header.h
header-y += ubi-user.h
diff --exclude=.git -urN linux-2.6.25.6/include/mtd/ubi-header.h avr32-2.6/include/mtd/ubi-header.h
--- linux-2.6.25.6/include/mtd/ubi-header.h 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/include/mtd/ubi-header.h 1970-01-01 01:00:00.000000000 +0100
@@ -1,372 +0,0 @@
-/*
- * Copyright (c) International Business Machines Corp., 2006
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * Authors: Artem Bityutskiy (Битюцкий Артём)
- * Thomas Gleixner
- * Frank Haverkamp
- * Oliver Lohmann
- * Andreas Arnez
- */
-
-/*
- * This file defines the layout of UBI headers and all the other UBI on-flash
- * data structures. May be included by user-space.
- */
-
-#ifndef __UBI_HEADER_H__
-#define __UBI_HEADER_H__
-
-#include <asm/byteorder.h>
-
-/* The version of UBI images supported by this implementation */
-#define UBI_VERSION 1
-
-/* The highest erase counter value supported by this implementation */
-#define UBI_MAX_ERASECOUNTER 0x7FFFFFFF
-
-/* The initial CRC32 value used when calculating CRC checksums */
-#define UBI_CRC32_INIT 0xFFFFFFFFU
-
-/* Erase counter header magic number (ASCII "UBI#") */
-#define UBI_EC_HDR_MAGIC 0x55424923
-/* Volume identifier header magic number (ASCII "UBI!") */
-#define UBI_VID_HDR_MAGIC 0x55424921
-
-/*
- * Volume type constants used in the volume identifier header.
- *
- * @UBI_VID_DYNAMIC: dynamic volume
- * @UBI_VID_STATIC: static volume
- */
-enum {
- UBI_VID_DYNAMIC = 1,
- UBI_VID_STATIC = 2
-};
-
-/*
- * Volume flags used in the volume table record.
- *
- * @UBI_VTBL_AUTORESIZE_FLG: auto-resize this volume
- *
- * %UBI_VTBL_AUTORESIZE_FLG flag can be set only for one volume in the volume
- * table. UBI automatically re-sizes the volume which has this flag and makes
- * the volume to be of largest possible size. This means that if after the
- * initialization UBI finds out that there are available physical eraseblocks
- * present on the device, it automatically appends all of them to the volume
- * (the physical eraseblocks reserved for bad eraseblocks handling and other
- * reserved physical eraseblocks are not taken). So, if there is a volume with
- * the %UBI_VTBL_AUTORESIZE_FLG flag set, the amount of available logical
- * eraseblocks will be zero after UBI is loaded, because all of them will be
- * reserved for this volume. Note, the %UBI_VTBL_AUTORESIZE_FLG bit is cleared
- * after the volume had been initialized.
- *
- * The auto-resize feature is useful for device production purposes. For
- * example, different NAND flash chips may have different amount of initial bad
- * eraseblocks, depending of particular chip instance. Manufacturers of NAND
- * chips usually guarantee that the amount of initial bad eraseblocks does not
- * exceed certain percent, e.g. 2%. When one creates an UBI image which will be
- * flashed to the end devices in production, he does not know the exact amount
- * of good physical eraseblocks the NAND chip on the device will have, but this
- * number is required to calculate the volume sized and put them to the volume
- * table of the UBI image. In this case, one of the volumes (e.g., the one
- * which will store the root file system) is marked as "auto-resizable", and
- * UBI will adjust its size on the first boot if needed.
- *
- * Note, first UBI reserves some amount of physical eraseblocks for bad
- * eraseblock handling, and then re-sizes the volume, not vice-versa. This
- * means that the pool of reserved physical eraseblocks will always be present.
- */
-enum {
- UBI_VTBL_AUTORESIZE_FLG = 0x01,
-};
-
-/*
- * Compatibility constants used by internal volumes.
- *
- * @UBI_COMPAT_DELETE: delete this internal volume before anything is written
- * to the flash
- * @UBI_COMPAT_RO: attach this device in read-only mode
- * @UBI_COMPAT_PRESERVE: preserve this internal volume - do not touch its
- * physical eraseblocks, don't allow the wear-leveling unit to move them
- * @UBI_COMPAT_REJECT: reject this UBI image
- */
-enum {
- UBI_COMPAT_DELETE = 1,
- UBI_COMPAT_RO = 2,
- UBI_COMPAT_PRESERVE = 4,
- UBI_COMPAT_REJECT = 5
-};
-
-/* Sizes of UBI headers */
-#define UBI_EC_HDR_SIZE sizeof(struct ubi_ec_hdr)
-#define UBI_VID_HDR_SIZE sizeof(struct ubi_vid_hdr)
-
-/* Sizes of UBI headers without the ending CRC */
-#define UBI_EC_HDR_SIZE_CRC (UBI_EC_HDR_SIZE - sizeof(__be32))
-#define UBI_VID_HDR_SIZE_CRC (UBI_VID_HDR_SIZE - sizeof(__be32))
-
-/**
- * struct ubi_ec_hdr - UBI erase counter header.
- * @magic: erase counter header magic number (%UBI_EC_HDR_MAGIC)
- * @version: version of UBI implementation which is supposed to accept this
- * UBI image
- * @padding1: reserved for future, zeroes
- * @ec: the erase counter
- * @vid_hdr_offset: where the VID header starts
- * @data_offset: where the user data start
- * @padding2: reserved for future, zeroes
- * @hdr_crc: erase counter header CRC checksum
- *
- * The erase counter header takes 64 bytes and has a plenty of unused space for
- * future usage. The unused fields are zeroed. The @version field is used to
- * indicate the version of UBI implementation which is supposed to be able to
- * work with this UBI image. If @version is greater then the current UBI
- * version, the image is rejected. This may be useful in future if something
- * is changed radically. This field is duplicated in the volume identifier
- * header.
- *
- * The @vid_hdr_offset and @data_offset fields contain the offset of the the
- * volume identifier header and user data, relative to the beginning of the
- * physical eraseblock. These values have to be the same for all physical
- * eraseblocks.
- */
-struct ubi_ec_hdr {
- __be32 magic;
- __u8 version;
- __u8 padding1[3];
- __be64 ec; /* Warning: the current limit is 31-bit anyway! */
- __be32 vid_hdr_offset;
- __be32 data_offset;
- __u8 padding2[36];
- __be32 hdr_crc;
-} __attribute__ ((packed));
-
-/**
- * struct ubi_vid_hdr - on-flash UBI volume identifier header.
- * @magic: volume identifier header magic number (%UBI_VID_HDR_MAGIC)
- * @version: UBI implementation version which is supposed to accept this UBI
- * image (%UBI_VERSION)
- * @vol_type: volume type (%UBI_VID_DYNAMIC or %UBI_VID_STATIC)
- * @copy_flag: if this logical eraseblock was copied from another physical
- * eraseblock (for wear-leveling reasons)
- * @compat: compatibility of this volume (%0, %UBI_COMPAT_DELETE,
- * %UBI_COMPAT_IGNORE, %UBI_COMPAT_PRESERVE, or %UBI_COMPAT_REJECT)
- * @vol_id: ID of this volume
- * @lnum: logical eraseblock number
- * @leb_ver: version of this logical eraseblock (IMPORTANT: obsolete, to be
- * removed, kept only for not breaking older UBI users)
- * @data_size: how many bytes of data this logical eraseblock contains
- * @used_ebs: total number of used logical eraseblocks in this volume
- * @data_pad: how many bytes at the end of this physical eraseblock are not
- * used
- * @data_crc: CRC checksum of the data stored in this logical eraseblock
- * @padding1: reserved for future, zeroes
- * @sqnum: sequence number
- * @padding2: reserved for future, zeroes
- * @hdr_crc: volume identifier header CRC checksum
- *
- * The @sqnum is the value of the global sequence counter at the time when this
- * VID header was created. The global sequence counter is incremented each time
- * UBI writes a new VID header to the flash, i.e. when it maps a logical
- * eraseblock to a new physical eraseblock. The global sequence counter is an
- * unsigned 64-bit integer and we assume it never overflows. The @sqnum
- * (sequence number) is used to distinguish between older and newer versions of
- * logical eraseblocks.
- *
- * There are 2 situations when there may be more then one physical eraseblock
- * corresponding to the same logical eraseblock, i.e., having the same @vol_id
- * and @lnum values in the volume identifier header. Suppose we have a logical
- * eraseblock L and it is mapped to the physical eraseblock P.
- *
- * 1. Because UBI may erase physical eraseblocks asynchronously, the following
- * situation is possible: L is asynchronously erased, so P is scheduled for
- * erasure, then L is written to,i.e. mapped to another physical eraseblock P1,
- * so P1 is written to, then an unclean reboot happens. Result - there are 2
- * physical eraseblocks P and P1 corresponding to the same logical eraseblock
- * L. But P1 has greater sequence number, so UBI picks P1 when it attaches the
- * flash.
- *
- * 2. From time to time UBI moves logical eraseblocks to other physical
- * eraseblocks for wear-leveling reasons. If, for example, UBI moves L from P
- * to P1, and an unclean reboot happens before P is physically erased, there
- * are two physical eraseblocks P and P1 corresponding to L and UBI has to
- * select one of them when the flash is attached. The @sqnum field says which
- * PEB is the original (obviously P will have lower @sqnum) and the copy. But
- * it is not enough to select the physical eraseblock with the higher sequence
- * number, because the unclean reboot could have happen in the middle of the
- * copying process, so the data in P is corrupted. It is also not enough to
- * just select the physical eraseblock with lower sequence number, because the
- * data there may be old (consider a case if more data was added to P1 after
- * the copying). Moreover, the unclean reboot may happen when the erasure of P
- * was just started, so it result in unstable P, which is "mostly" OK, but
- * still has unstable bits.
- *
- * UBI uses the @copy_flag field to indicate that this logical eraseblock is a
- * copy. UBI also calculates data CRC when the data is moved and stores it at
- * the @data_crc field of the copy (P1). So when UBI needs to pick one physical
- * eraseblock of two (P or P1), the @copy_flag of the newer one (P1) is
- * examined. If it is cleared, the situation* is simple and the newer one is
- * picked. If it is set, the data CRC of the copy (P1) is examined. If the CRC
- * checksum is correct, this physical eraseblock is selected (P1). Otherwise
- * the older one (P) is selected.
- *
- * Note, there is an obsolete @leb_ver field which was used instead of @sqnum
- * in the past. But it is not used anymore and we keep it in order to be able
- * to deal with old UBI images. It will be removed at some point.
- *
- * There are 2 sorts of volumes in UBI: user volumes and internal volumes.
- * Internal volumes are not seen from outside and are used for various internal
- * UBI purposes. In this implementation there is only one internal volume - the
- * layout volume. Internal volumes are the main mechanism of UBI extensions.
- * For example, in future one may introduce a journal internal volume. Internal
- * volumes have their own reserved range of IDs.
- *
- * The @compat field is only used for internal volumes and contains the "degree
- * of their compatibility". It is always zero for user volumes. This field
- * provides a mechanism to introduce UBI extensions and to be still compatible
- * with older UBI binaries. For example, if someone introduced a journal in
- * future, he would probably use %UBI_COMPAT_DELETE compatibility for the
- * journal volume. And in this case, older UBI binaries, which know nothing
- * about the journal volume, would just delete this volume and work perfectly
- * fine. This is similar to what Ext2fs does when it is fed by an Ext3fs image
- * - it just ignores the Ext3fs journal.
- *
- * The @data_crc field contains the CRC checksum of the contents of the logical
- * eraseblock if this is a static volume. In case of dynamic volumes, it does
- * not contain the CRC checksum as a rule. The only exception is when the
- * data of the physical eraseblock was moved by the wear-leveling unit, then
- * the wear-leveling unit calculates the data CRC and stores it in the
- * @data_crc field. And of course, the @copy_flag is %in this case.
- *
- * The @data_size field is used only for static volumes because UBI has to know
- * how many bytes of data are stored in this eraseblock. For dynamic volumes,
- * this field usually contains zero. The only exception is when the data of the
- * physical eraseblock was moved to another physical eraseblock for
- * wear-leveling reasons. In this case, UBI calculates CRC checksum of the
- * contents and uses both @data_crc and @data_size fields. In this case, the
- * @data_size field contains data size.
- *
- * The @used_ebs field is used only for static volumes and indicates how many
- * eraseblocks the data of the volume takes. For dynamic volumes this field is
- * not used and always contains zero.
- *
- * The @data_pad is calculated when volumes are created using the alignment
- * parameter. So, effectively, the @data_pad field reduces the size of logical
- * eraseblocks of this volume. This is very handy when one uses block-oriented
- * software (say, cramfs) on top of the UBI volume.
- */
-struct ubi_vid_hdr {
- __be32 magic;
- __u8 version;
- __u8 vol_type;
- __u8 copy_flag;
- __u8 compat;
- __be32 vol_id;
- __be32 lnum;
- __be32 leb_ver; /* obsolete, to be removed, don't use */
- __be32 data_size;
- __be32 used_ebs;
- __be32 data_pad;
- __be32 data_crc;
- __u8 padding1[4];
- __be64 sqnum;
- __u8 padding2[12];
- __be32 hdr_crc;
-} __attribute__ ((packed));
-
-/* Internal UBI volumes count */
-#define UBI_INT_VOL_COUNT 1
-
-/*
- * Starting ID of internal volumes. There is reserved room for 4096 internal
- * volumes.
- */
-#define UBI_INTERNAL_VOL_START (0x7FFFFFFF - 4096)
-
-/* The layout volume contains the volume table */
-
-#define UBI_LAYOUT_VOLUME_ID UBI_INTERNAL_VOL_START
-#define UBI_LAYOUT_VOLUME_TYPE UBI_VID_DYNAMIC
-#define UBI_LAYOUT_VOLUME_ALIGN 1
-#define UBI_LAYOUT_VOLUME_EBS 2
-#define UBI_LAYOUT_VOLUME_NAME "layout volume"
-#define UBI_LAYOUT_VOLUME_COMPAT UBI_COMPAT_REJECT
-
-/* The maximum number of volumes per one UBI device */
-#define UBI_MAX_VOLUMES 128
-
-/* The maximum volume name length */
-#define UBI_VOL_NAME_MAX 127
-
-/* Size of the volume table record */
-#define UBI_VTBL_RECORD_SIZE sizeof(struct ubi_vtbl_record)
-
-/* Size of the volume table record without the ending CRC */
-#define UBI_VTBL_RECORD_SIZE_CRC (UBI_VTBL_RECORD_SIZE - sizeof(__be32))
-
-/**
- * struct ubi_vtbl_record - a record in the volume table.
- * @reserved_pebs: how many physical eraseblocks are reserved for this volume
- * @alignment: volume alignment
- * @data_pad: how many bytes are unused at the end of the each physical
- * eraseblock to satisfy the requested alignment
- * @vol_type: volume type (%UBI_DYNAMIC_VOLUME or %UBI_STATIC_VOLUME)
- * @upd_marker: if volume update was started but not finished
- * @name_len: volume name length
- * @name: the volume name
- * @flags: volume flags (%UBI_VTBL_AUTORESIZE_FLG)
- * @padding: reserved, zeroes
- * @crc: a CRC32 checksum of the record
- *
- * The volume table records are stored in the volume table, which is stored in
- * the layout volume. The layout volume consists of 2 logical eraseblock, each
- * of which contains a copy of the volume table (i.e., the volume table is
- * duplicated). The volume table is an array of &struct ubi_vtbl_record
- * objects indexed by the volume ID.
- *
- * If the size of the logical eraseblock is large enough to fit
- * %UBI_MAX_VOLUMES records, the volume table contains %UBI_MAX_VOLUMES
- * records. Otherwise, it contains as many records as it can fit (i.e., size of
- * logical eraseblock divided by sizeof(struct ubi_vtbl_record)).
- *
- * The @upd_marker flag is used to implement volume update. It is set to %1
- * before update and set to %0 after the update. So if the update operation was
- * interrupted, UBI knows that the volume is corrupted.
- *
- * The @alignment field is specified when the volume is created and cannot be
- * later changed. It may be useful, for example, when a block-oriented file
- * system works on top of UBI. The @data_pad field is calculated using the
- * logical eraseblock size and @alignment. The alignment must be multiple to the
- * minimal flash I/O unit. If @alignment is 1, all the available space of
- * the physical eraseblocks is used.
- *
- * Empty records contain all zeroes and the CRC checksum of those zeroes.
- */
-struct ubi_vtbl_record {
- __be32 reserved_pebs;
- __be32 alignment;
- __be32 data_pad;
- __u8 vol_type;
- __u8 upd_marker;
- __be16 name_len;
- __u8 name[UBI_VOL_NAME_MAX+1];
- __u8 flags;
- __u8 padding[23];
- __be32 crc;
-} __attribute__ ((packed));
-
-#endif /* !__UBI_HEADER_H__ */
diff --exclude=.git -urN linux-2.6.25.6/init/do_mounts.c avr32-2.6/init/do_mounts.c
--- linux-2.6.25.6/init/do_mounts.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/init/do_mounts.c 2008-06-12 15:09:46.451815572 +0200
@@ -126,8 +126,14 @@
static int __init rootwait_setup(char *str)
{
- if (*str)
+ if (*str && *str != '=')
return 0;
+
+ if (*str)
+ printk(KERN_WARNING
+ "WARNING: \"rootwait=1\" is deprecated, "
+ "use \"rootwait\" instead.\n");
+
root_wait = 1;
return 1;
}
@@ -347,7 +353,8 @@
if (saved_root_name[0]) {
root_device_name = saved_root_name;
- if (!strncmp(root_device_name, "mtd", 3)) {
+ if (!strncmp(root_device_name, "mtd", 3) ||
+ !strncmp(root_device_name, "ubi", 3)) {
mount_block_root(root_device_name, root_mountflags);
goto out;
}
diff --exclude=.git -urN linux-2.6.25.6/sound/avr32/ac97c.c avr32-2.6/sound/avr32/ac97c.c
--- linux-2.6.25.6/sound/avr32/ac97c.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/sound/avr32/ac97c.c 2008-06-12 15:09:47.011815952 +0200
@@ -0,0 +1,914 @@
+/*
+ * Driver for the Atmel AC97 controller
+ *
+ * Copyright (C) 2005-2007 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/io.h>
+
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/ac97_codec.h>
+#include <sound/memalloc.h>
+
+#include <asm/dma-controller.h>
+
+#include "ac97c.h"
+
+/* Serialize access to opened */
+static DEFINE_MUTEX(opened_mutex);
+
+struct atmel_ac97_dma_info {
+ struct dma_request_cyclic req_tx;
+ struct dma_request_cyclic req_rx;
+ unsigned short rx_periph_id;
+ unsigned short tx_periph_id;
+};
+
+struct atmel_ac97 {
+ /* Serialize access to opened */
+ spinlock_t lock;
+ void __iomem *regs;
+ struct snd_pcm_substream *playback_substream;
+ struct snd_pcm_substream *capture_substream;
+ struct snd_card *card;
+ struct snd_pcm *pcm;
+ struct snd_ac97 *ac97;
+ struct snd_ac97_bus *ac97_bus;
+ int opened;
+ int period;
+ u64 cur_format;
+ unsigned int cur_rate;
+ struct clk *mck;
+ struct platform_device *pdev;
+ struct atmel_ac97_dma_info dma;
+};
+
+#define get_chip(card) ((struct atmel_ac97 *)(card)->private_data)
+
+#define ac97c_writel(chip, reg, val) \
+ __raw_writel((val), (chip)->regs + AC97C_##reg)
+#define ac97c_readl(chip, reg) \
+ __raw_readl((chip)->regs + AC97C_##reg)
+
+/*
+ * PCM part
+ */
+static struct snd_pcm_hardware snd_atmel_ac97_playback_hw = {
+ .info = (SNDRV_PCM_INFO_INTERLEAVED
+ | SNDRV_PCM_INFO_MMAP
+ | SNDRV_PCM_INFO_MMAP_VALID
+ | SNDRV_PCM_INFO_BLOCK_TRANSFER
+ | SNDRV_PCM_INFO_JOINT_DUPLEX),
+ .formats = (SNDRV_PCM_FMTBIT_S16_BE
+ | SNDRV_PCM_FMTBIT_S16_LE),
+ .rates = (SNDRV_PCM_RATE_CONTINUOUS),
+ .rate_min = 4000,
+ .rate_max = 48000,
+ .channels_min = 1,
+ .channels_max = 6,
+ .buffer_bytes_max = 64*1024,
+ .period_bytes_min = 512,
+ .period_bytes_max = 4095,
+ .periods_min = 8,
+ .periods_max = 1024,
+};
+
+static struct snd_pcm_hardware snd_atmel_ac97_capture_hw = {
+ .info = (SNDRV_PCM_INFO_INTERLEAVED
+ | SNDRV_PCM_INFO_MMAP
+ | SNDRV_PCM_INFO_MMAP_VALID
+ | SNDRV_PCM_INFO_BLOCK_TRANSFER
+ | SNDRV_PCM_INFO_JOINT_DUPLEX),
+ .formats = (SNDRV_PCM_FMTBIT_S16_BE
+ | SNDRV_PCM_FMTBIT_S16_LE),
+ .rates = (SNDRV_PCM_RATE_CONTINUOUS),
+ .rate_min = 4000,
+ .rate_max = 48000,
+ .channels_min = 1,
+ .channels_max = 2,
+ .buffer_bytes_max = 64*1024,
+ .period_bytes_min = 512,
+ .period_bytes_max = 4095,
+ .periods_min = 8,
+ .periods_max = 1024,
+};
+
+/*
+ * PCM functions
+ */
+static int
+snd_atmel_ac97_playback_open(struct snd_pcm_substream *substream)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ mutex_lock(&opened_mutex);
+ chip->opened++;
+ runtime->hw = snd_atmel_ac97_playback_hw;
+ if (chip->cur_rate) {
+ runtime->hw.rate_min = chip->cur_rate;
+ runtime->hw.rate_max = chip->cur_rate;
+ }
+ if (chip->cur_format)
+ runtime->hw.formats = (1ULL << chip->cur_format);
+ mutex_unlock(&opened_mutex);
+ chip->playback_substream = substream;
+ chip->period = 0;
+ return 0;
+}
+
+static int
+snd_atmel_ac97_capture_open(struct snd_pcm_substream *substream)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+
+ mutex_lock(&opened_mutex);
+ chip->opened++;
+ runtime->hw = snd_atmel_ac97_capture_hw;
+ if (chip->cur_rate) {
+ runtime->hw.rate_min = chip->cur_rate;
+ runtime->hw.rate_max = chip->cur_rate;
+ }
+ if (chip->cur_format)
+ runtime->hw.formats = (1ULL << chip->cur_format);
+ mutex_unlock(&opened_mutex);
+ chip->capture_substream = substream;
+ chip->period = 0;
+ return 0;
+}
+
+static int snd_atmel_ac97_playback_close(struct snd_pcm_substream *substream)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ mutex_lock(&opened_mutex);
+ chip->opened--;
+ if (!chip->opened) {
+ chip->cur_rate = 0;
+ chip->cur_format = 0;
+ }
+ mutex_unlock(&opened_mutex);
+ return 0;
+}
+
+static int snd_atmel_ac97_capture_close(struct snd_pcm_substream *substream)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ mutex_lock(&opened_mutex);
+ chip->opened--;
+ if (!chip->opened) {
+ chip->cur_rate = 0;
+ chip->cur_format = 0;
+ }
+ mutex_unlock(&opened_mutex);
+ return 0;
+}
+
+static int
+snd_atmel_ac97_playback_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ int err;
+
+ err = snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
+ if (err < 0)
+ return err;
+
+ /* Set restrictions to params */
+ mutex_lock(&opened_mutex);
+ chip->cur_rate = params_rate(hw_params);
+ chip->cur_format = params_format(hw_params);
+ mutex_unlock(&opened_mutex);
+
+ return 0;
+}
+
+static int
+snd_atmel_ac97_capture_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ int err;
+
+ err = snd_pcm_lib_malloc_pages(substream,
+ params_buffer_bytes(hw_params));
+ if (err < 0)
+ return err;
+
+ /* Set restrictions to params */
+ mutex_lock(&opened_mutex);
+ chip->cur_rate = params_rate(hw_params);
+ chip->cur_format = params_format(hw_params);
+ mutex_unlock(&opened_mutex);
+
+ return 0;
+}
+
+static int snd_atmel_ac97_playback_hw_free(struct snd_pcm_substream *substream)
+{
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static int snd_atmel_ac97_capture_hw_free(struct snd_pcm_substream *substream)
+{
+
+ return snd_pcm_lib_free_pages(substream);
+}
+
+static int snd_atmel_ac97_playback_prepare(struct snd_pcm_substream *substream)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ struct platform_device *pdev = chip->pdev;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int block_size = frames_to_bytes(runtime, runtime->period_size);
+ unsigned long word = 0;
+ unsigned long buffer_size = 0;
+
+ dma_sync_single_for_device(&pdev->dev, runtime->dma_addr,
+ block_size * 2, DMA_TO_DEVICE);
+
+ /* Assign slots to channels */
+ switch (substream->runtime->channels) {
+ case 1:
+ word |= AC97C_CH_ASSIGN(PCM_LEFT, A);
+ break;
+ case 2:
+ /* Assign Left and Right slot to Channel A */
+ word |= AC97C_CH_ASSIGN(PCM_LEFT, A)
+ | AC97C_CH_ASSIGN(PCM_RIGHT, A);
+ break;
+ default:
+ /* TODO: support more than two channels */
+ return -EINVAL;
+ break;
+ }
+ ac97c_writel(chip, OCA, word);
+
+ /* Configure sample format and size */
+ word = AC97C_CMR_PDCEN | AC97C_CMR_SIZE_16;
+
+ switch (runtime->format) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ word |= AC97C_CMR_CEM_LITTLE;
+ break;
+ case SNDRV_PCM_FORMAT_S16_BE: /* fall through */
+ default:
+ word &= ~AC97C_CMR_CEM_LITTLE;
+ break;
+ }
+
+ ac97c_writel(chip, CAMR, word);
+
+ /* Set variable rate if needed */
+ if (runtime->rate != 48000) {
+ word = ac97c_readl(chip, MR);
+ word |= AC97C_MR_VRA;
+ ac97c_writel(chip, MR, word);
+ } else {
+ /* Clear Variable Rate Bit */
+ word = ac97c_readl(chip, MR);
+ word &= ~AC97C_MR_VRA;
+ ac97c_writel(chip, MR, word);
+ }
+
+ /* Set rate */
+ snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
+
+ buffer_size = frames_to_bytes(runtime, runtime->period_size) *
+ runtime->periods;
+
+ chip->dma.req_tx.buffer_size = buffer_size;
+ chip->dma.req_tx.periods = runtime->periods;
+
+ BUG_ON(chip->dma.req_tx.buffer_size !=
+ (chip->dma.req_tx.periods *
+ frames_to_bytes(runtime, runtime->period_size)));
+
+ chip->dma.req_tx.buffer_start = runtime->dma_addr;
+ chip->dma.req_tx.data_reg = (dma_addr_t)(chip->regs + AC97C_CATHR + 2);
+ chip->dma.req_tx.periph_id = chip->dma.tx_periph_id;
+ chip->dma.req_tx.direction = DMA_DIR_MEM_TO_PERIPH;
+ chip->dma.req_tx.width = DMA_WIDTH_16BIT;
+ chip->dma.req_tx.dev_id = chip;
+
+ return 0;
+}
+
+static int snd_atmel_ac97_capture_prepare(struct snd_pcm_substream *substream)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ struct platform_device *pdev = chip->pdev;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ int block_size = frames_to_bytes(runtime, runtime->period_size);
+ unsigned long word = 0;
+ unsigned long buffer_size = 0;
+
+ dma_sync_single_for_device(&pdev->dev, runtime->dma_addr,
+ block_size * 2, DMA_FROM_DEVICE);
+
+ /* Assign slots to channels */
+ switch (substream->runtime->channels) {
+ case 1:
+ word |= AC97C_CH_ASSIGN(PCM_LEFT, A);
+ break;
+ case 2:
+ /* Assign Left and Right slot to Channel A */
+ word |= AC97C_CH_ASSIGN(PCM_LEFT, A)
+ | AC97C_CH_ASSIGN(PCM_RIGHT, A);
+ break;
+ default:
+ /* TODO: support more than two channels */
+ return -EINVAL;
+ break;
+ }
+ ac97c_writel(chip, ICA, word);
+
+ /* Configure sample format and size */
+ word = AC97C_CMR_PDCEN | AC97C_CMR_SIZE_16;
+
+ switch (runtime->format) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ word |= AC97C_CMR_CEM_LITTLE;
+ break;
+ case SNDRV_PCM_FORMAT_S16_BE:
+ default:
+ word &= ~(AC97C_CMR_CEM_LITTLE);
+ break;
+ }
+
+ ac97c_writel(chip, CAMR, word);
+
+ /* Set variable rate if needed */
+ if (runtime->rate != 48000) {
+ word = ac97c_readl(chip, MR);
+ word |= AC97C_MR_VRA;
+ ac97c_writel(chip, MR, word);
+ } else {
+ /* Clear Variable Rate Bit */
+ word = ac97c_readl(chip, MR);
+ word &= ~(AC97C_MR_VRA);
+ ac97c_writel(chip, MR, word);
+ }
+
+ /* Set rate */
+ snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
+
+ buffer_size = frames_to_bytes(runtime, runtime->period_size) *
+ runtime->periods;
+
+ chip->dma.req_rx.buffer_size = buffer_size;
+ chip->dma.req_rx.periods = runtime->periods;
+
+ BUG_ON(chip->dma.req_rx.buffer_size !=
+ (chip->dma.req_rx.periods *
+ frames_to_bytes(runtime, runtime->period_size)));
+
+ chip->dma.req_rx.buffer_start = runtime->dma_addr;
+ chip->dma.req_rx.data_reg = (dma_addr_t)(chip->regs + AC97C_CARHR + 2);
+ chip->dma.req_rx.periph_id = chip->dma.rx_periph_id;
+ chip->dma.req_rx.direction = DMA_DIR_PERIPH_TO_MEM;
+ chip->dma.req_rx.width = DMA_WIDTH_16BIT;
+ chip->dma.req_rx.dev_id = chip;
+
+ return 0;
+}
+
+ static int
+snd_atmel_ac97_playback_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ unsigned long camr;
+ int flags, err = 0;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ camr = ac97c_readl(chip, CAMR);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ err = dma_prepare_request_cyclic(chip->dma.req_tx.req.dmac,
+ &chip->dma.req_tx);
+ dma_start_request(chip->dma.req_tx.req.dmac,
+ chip->dma.req_tx.req.channel);
+ camr |= AC97C_CMR_CENA;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ err = dma_stop_request(chip->dma.req_tx.req.dmac,
+ chip->dma.req_tx.req.channel);
+ if (chip->opened <= 1)
+ camr &= ~AC97C_CMR_CENA;
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ ac97c_writel(chip, CAMR, camr);
+
+ spin_unlock_irqrestore(&chip->lock, flags);
+ return err;
+}
+
+ static int
+snd_atmel_ac97_capture_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ unsigned long camr;
+ int flags, err = 0;
+
+ spin_lock_irqsave(&chip->lock, flags);
+ camr = ac97c_readl(chip, CAMR);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ err = dma_prepare_request_cyclic(chip->dma.req_rx.req.dmac,
+ &chip->dma.req_rx);
+ dma_start_request(chip->dma.req_rx.req.dmac,
+ chip->dma.req_rx.req.channel);
+ camr |= AC97C_CMR_CENA;
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ err = dma_stop_request(chip->dma.req_rx.req.dmac,
+ chip->dma.req_rx.req.channel);
+ mutex_lock(&opened_mutex);
+ if (chip->opened <= 1)
+ camr &= ~AC97C_CMR_CENA;
+ mutex_unlock(&opened_mutex);
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+
+ ac97c_writel(chip, CAMR, camr);
+
+ spin_unlock_irqrestore(&chip->lock, flags);
+ return err;
+}
+
+ static snd_pcm_uframes_t
+snd_atmel_ac97_playback_pointer(struct snd_pcm_substream *substream)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_uframes_t pos;
+ unsigned long bytes;
+
+ bytes = (dma_get_current_pos
+ (chip->dma.req_tx.req.dmac,
+ chip->dma.req_tx.req.channel) - runtime->dma_addr);
+ pos = bytes_to_frames(runtime, bytes);
+ if (pos >= runtime->buffer_size)
+ pos -= runtime->buffer_size;
+
+ return pos;
+}
+
+ static snd_pcm_uframes_t
+snd_atmel_ac97_capture_pointer(struct snd_pcm_substream *substream)
+{
+ struct atmel_ac97 *chip = snd_pcm_substream_chip(substream);
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_uframes_t pos;
+ unsigned long bytes;
+
+ bytes = (dma_get_current_pos
+ (chip->dma.req_rx.req.dmac,
+ chip->dma.req_rx.req.channel)
+ - runtime->dma_addr);
+ pos = bytes_to_frames(runtime, bytes);
+ if (pos >= runtime->buffer_size)
+ pos -= runtime->buffer_size;
+
+
+ return pos;
+}
+
+static struct snd_pcm_ops atmel_ac97_playback_ops = {
+ .open = snd_atmel_ac97_playback_open,
+ .close = snd_atmel_ac97_playback_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_atmel_ac97_playback_hw_params,
+ .hw_free = snd_atmel_ac97_playback_hw_free,
+ .prepare = snd_atmel_ac97_playback_prepare,
+ .trigger = snd_atmel_ac97_playback_trigger,
+ .pointer = snd_atmel_ac97_playback_pointer,
+};
+
+static struct snd_pcm_ops atmel_ac97_capture_ops = {
+ .open = snd_atmel_ac97_capture_open,
+ .close = snd_atmel_ac97_capture_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = snd_atmel_ac97_capture_hw_params,
+ .hw_free = snd_atmel_ac97_capture_hw_free,
+ .prepare = snd_atmel_ac97_capture_prepare,
+ .trigger = snd_atmel_ac97_capture_trigger,
+ .pointer = snd_atmel_ac97_capture_pointer,
+};
+
+static struct ac97_pcm atmel_ac97_pcm_defs[] __devinitdata = {
+ /* Playback */
+ {
+ .exclusive = 1,
+ .r = { {
+ .slots = ((1 << AC97_SLOT_PCM_LEFT)
+ | (1 << AC97_SLOT_PCM_RIGHT)
+ | (1 << AC97_SLOT_PCM_CENTER)
+ | (1 << AC97_SLOT_PCM_SLEFT)
+ | (1 << AC97_SLOT_PCM_SRIGHT)
+ | (1 << AC97_SLOT_LFE)),
+ } }
+ },
+ /* PCM in */
+ {
+ .stream = 1,
+ .exclusive = 1,
+ .r = { {
+ .slots = ((1 << AC97_SLOT_PCM_LEFT)
+ | (1 << AC97_SLOT_PCM_RIGHT)),
+ } }
+ },
+ /* Mic in */
+ {
+ .stream = 1,
+ .exclusive = 1,
+ .r = { {
+ .slots = (1<<AC97_SLOT_MIC),
+ } }
+ },
+};
+
+static int __devinit snd_atmel_ac97_pcm_new(struct atmel_ac97 *chip)
+{
+ struct snd_pcm *pcm;
+ int err;
+
+ err = snd_ac97_pcm_assign(chip->ac97_bus,
+ ARRAY_SIZE(atmel_ac97_pcm_defs),
+ atmel_ac97_pcm_defs);
+ if (err)
+ return err;
+
+ err = snd_pcm_new(chip->card, "Atmel-AC97", 0, 1, 1, &pcm);
+ if (err)
+ return err;
+
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+ &atmel_ac97_playback_ops);
+
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
+ &atmel_ac97_capture_ops);
+
+ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+ &chip->pdev->dev,
+ 128 * 1024, 128 * 1024);
+
+ pcm->private_data = chip;
+ pcm->info_flags = 0;
+ strcpy(pcm->name, "Atmel-AC97");
+ chip->pcm = pcm;
+
+ return 0;
+}
+
+/*
+ * Mixer part.
+ */
+static int snd_atmel_ac97_mixer_new(struct atmel_ac97 *chip)
+{
+ int err;
+ struct snd_ac97_template template;
+
+ memset(&template, 0, sizeof(template));
+ template.private_data = chip;
+ err = snd_ac97_mixer(chip->ac97_bus, &template, &chip->ac97);
+
+ return err;
+}
+
+static void atmel_ac97_error(struct dma_request *_req)
+{
+ struct dma_request_cyclic *req = to_dma_request_cyclic(_req);
+ struct atmel_ac97 *chip = req->dev_id;
+
+ dev_dbg(&chip->pdev->dev, "DMA Controller error, channel %d\n",
+ req->req.channel);
+}
+
+static void atmel_ac97_block_complete(struct dma_request *_req)
+{
+ struct dma_request_cyclic *req = to_dma_request_cyclic(_req);
+ struct atmel_ac97 *chip = req->dev_id;
+ if (req->periph_id == chip->dma.tx_periph_id)
+ snd_pcm_period_elapsed(chip->playback_substream);
+ else
+ snd_pcm_period_elapsed(chip->capture_substream);
+}
+
+/*
+ * Codec part.
+ */
+static void snd_atmel_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
+ unsigned short val)
+{
+ struct atmel_ac97 *chip = get_chip(ac97);
+ unsigned long word;
+ int timeout = 40;
+
+ word = (reg & 0x7f) << 16 | val;
+
+ do {
+ if (ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) {
+ ac97c_writel(chip, COTHR, word);
+ return;
+ }
+ udelay(1);
+ } while (--timeout);
+
+ dev_dbg(&chip->pdev->dev, "codec write timeout\n");
+}
+
+static unsigned short snd_atmel_ac97_read(struct snd_ac97 *ac97,
+ unsigned short reg)
+{
+ struct atmel_ac97 *chip = get_chip(ac97);
+ unsigned long word;
+ int timeout = 40;
+ int write = 10;
+
+ word = (0x80 | (reg & 0x7f)) << 16;
+
+ if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0)
+ ac97c_readl(chip, CORHR);
+
+retry_write:
+ timeout = 40;
+
+ do {
+ if ((ac97c_readl(chip, COSR) & AC97C_CSR_TXRDY) != 0) {
+ ac97c_writel(chip, COTHR, word);
+ goto read_reg;
+ }
+ udelay(10);
+ } while (--timeout);
+
+ if (!--write)
+ goto timed_out;
+ goto retry_write;
+
+read_reg:
+ do {
+ if ((ac97c_readl(chip, COSR) & AC97C_CSR_RXRDY) != 0) {
+ unsigned short val = ac97c_readl(chip, CORHR);
+ return val;
+ }
+ udelay(10);
+ } while (--timeout);
+
+ if (!--write)
+ goto timed_out;
+ goto retry_write;
+
+timed_out:
+ dev_dbg(&chip->pdev->dev, "codec read timeout\n");
+ return 0xffff;
+}
+
+static void snd_atmel_ac97_reset(struct atmel_ac97 *chip)
+{
+ ac97c_writel(chip, MR, AC97C_MR_WRST);
+ mdelay(1);
+ ac97c_writel(chip, MR, AC97C_MR_ENA);
+}
+
+static void snd_atmel_ac97_destroy(struct snd_card *card)
+{
+ struct atmel_ac97 *chip = get_chip(card);
+
+ if (chip->regs)
+ iounmap(chip->regs);
+
+ if (chip->mck) {
+ clk_disable(chip->mck);
+ clk_put(chip->mck);
+ }
+
+ if (chip->dma.req_tx.req.dmac) {
+ dma_release_channel(chip->dma.req_tx.req.dmac,
+ chip->dma.req_tx.req.channel);
+ }
+ if (chip->dma.req_rx.req.dmac) {
+ dma_release_channel(chip->dma.req_rx.req.dmac,
+ chip->dma.req_rx.req.channel);
+ }
+}
+
+static int __devinit snd_atmel_ac97_create(struct snd_card *card,
+ struct platform_device *pdev)
+{
+ static struct snd_ac97_bus_ops ops = {
+ .write = snd_atmel_ac97_write,
+ .read = snd_atmel_ac97_read,
+ };
+ struct atmel_ac97 *chip = get_chip(card);
+ struct resource *regs;
+ struct clk *mck;
+ int err;
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs)
+ return -ENXIO;
+
+ mck = clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(mck))
+ return PTR_ERR(mck);
+ clk_enable(mck);
+ chip->mck = mck;
+
+ card->private_free = snd_atmel_ac97_destroy;
+
+ spin_lock_init(&chip->lock);
+ chip->card = card;
+ chip->pdev = pdev;
+
+ chip->regs = ioremap(regs->start, regs->end - regs->start + 1);
+ if (!chip->regs)
+ return -ENOMEM;
+
+ snd_card_set_dev(card, &pdev->dev);
+
+ err = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus);
+
+ return err;
+}
+
+static int __devinit snd_atmel_ac97_probe(struct platform_device *pdev)
+{
+ static int dev;
+ struct snd_card *card;
+ struct atmel_ac97 *chip;
+ int err;
+ int ch;
+
+ mutex_init(&opened_mutex);
+
+ err = -ENOMEM;
+ card = snd_card_new(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+ THIS_MODULE, sizeof(struct atmel_ac97));
+ if (!card)
+ goto out;
+ chip = get_chip(card);
+
+ err = snd_atmel_ac97_create(card, pdev);
+ if (err)
+ goto out_free_card;
+
+ snd_atmel_ac97_reset(chip);
+
+ err = snd_atmel_ac97_mixer_new(chip);
+ if (err)
+ goto out_free_card;
+
+ err = snd_atmel_ac97_pcm_new(chip);
+ if (err)
+ goto out_free_card;
+
+ /* TODO: Get this information from the platform device */
+ chip->dma.req_tx.req.dmac = find_dma_controller(0);
+ if (!chip->dma.req_tx.req.dmac) {
+ dev_dbg(&chip->pdev->dev, "DMA controller for TX missing\n");
+ err = -ENODEV;
+ goto out_free_card;
+ }
+ chip->dma.req_rx.req.dmac = find_dma_controller(0);
+ if (!chip->dma.req_rx.req.dmac) {
+ dev_dbg(&chip->pdev->dev, "DMA controller for RX missing\n");
+ err = -ENODEV;
+ goto out_free_card;
+ }
+
+ chip->dma.rx_periph_id = 3;
+ chip->dma.tx_periph_id = 4;
+
+ ch = dma_alloc_channel(chip->dma.req_tx.req.dmac);
+ if (ch < 0) {
+ dev_dbg(&chip->pdev->dev,
+ "could not allocate TX DMA channel\n");
+ err = ch;
+ goto out_free_card;
+ }
+ chip->dma.req_tx.req.channel = ch;
+ chip->dma.req_tx.width = DMA_WIDTH_16BIT;
+ chip->dma.req_tx.req.block_complete = atmel_ac97_block_complete;
+ chip->dma.req_tx.req.error = atmel_ac97_error;
+
+ ch = dma_alloc_channel(chip->dma.req_rx.req.dmac);
+ if (ch < 0) {
+ dev_dbg(&chip->pdev->dev,
+ "could not allocate RX DMA channel\n");
+ err = ch;
+ goto out_free_card;
+ }
+ chip->dma.req_rx.req.channel = ch;
+ chip->dma.req_rx.width = DMA_WIDTH_16BIT;
+ chip->dma.req_rx.req.block_complete = atmel_ac97_block_complete;
+ chip->dma.req_rx.req.error = atmel_ac97_error;
+
+ strcpy(card->driver, "atmel_ac97c");
+ strcpy(card->shortname, "atmel_ac97c");
+ sprintf(card->longname, "Atmel AVR32 AC97 controller");
+
+ err = snd_card_register(card);
+ if (err)
+ goto out_free_card;
+
+ platform_set_drvdata(pdev, card);
+ dev++;
+
+ dev_info(&pdev->dev, "Atmel AVR32 AC97 controller at 0x%p\n",
+ chip->regs);
+
+ return 0;
+
+out_free_card:
+ snd_card_free(card);
+out:
+ return err;
+}
+
+#ifdef CONFIG_PM
+ static int
+snd_atmel_ac97_suspend(struct platform_device *pdev, pm_message_t msg)
+{
+ struct snd_card *card = platform_get_drvdata(pdev);
+ struct atmel_ac97 *chip = card->private_data;
+
+ clk_disable(chip->mck);
+
+ return 0;
+}
+
+static int snd_atmel_ac97_resume(struct platform_device *pdev)
+{
+ struct snd_card *card = dev_get_drvdata(pdev);
+ struct atmel_ac97 *chip = card->private_data;
+
+ clk_enable(chip->mck);
+
+ return 0;
+}
+#else
+#define snd_atmel_ac97_suspend NULL
+#define snd_atmel_ac97_resume NULL
+#endif
+
+static int __devexit snd_atmel_ac97_remove(struct platform_device *pdev)
+{
+ struct snd_card *card = platform_get_drvdata(pdev);
+
+ snd_card_free(card);
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static struct platform_driver atmel_ac97_driver = {
+ .remove = __devexit_p(snd_atmel_ac97_remove),
+ .driver = {
+ .name = "atmel_ac97c",
+ },
+ .suspend = snd_atmel_ac97_suspend,
+ .resume = snd_atmel_ac97_resume,
+};
+
+static int __init atmel_ac97_init(void)
+{
+ return platform_driver_probe(&atmel_ac97_driver,
+ snd_atmel_ac97_probe);
+}
+module_init(atmel_ac97_init);
+
+static void __exit atmel_ac97_exit(void)
+{
+ platform_driver_unregister(&atmel_ac97_driver);
+}
+module_exit(atmel_ac97_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Driver for Atmel AC97 Controller");
+MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
diff --exclude=.git -urN linux-2.6.25.6/sound/avr32/ac97c.h avr32-2.6/sound/avr32/ac97c.h
--- linux-2.6.25.6/sound/avr32/ac97c.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/sound/avr32/ac97c.h 2008-06-12 15:09:47.011815952 +0200
@@ -0,0 +1,71 @@
+/*
+ * Register definitions for the Atmel AC97 Controller.
+ *
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __SOUND_AVR32_AC97C_H
+#define __SOUND_AVR32_AC97C_H
+
+#define AC97C_MR 0x08
+#define AC97C_ICA 0x10
+#define AC97C_OCA 0x14
+#define AC97C_CARHR 0x20
+#define AC97C_CATHR 0x24
+#define AC97C_CASR 0x28
+#define AC97C_CAMR 0x2c
+#define AC97C_CBRHR 0x30
+#define AC97C_CBTHR 0x34
+#define AC97C_CBSR 0x38
+#define AC97C_CBMR 0x3c
+#define AC97C_CORHR 0x40
+#define AC97C_COTHR 0x44
+#define AC97C_COSR 0x48
+#define AC97C_COMR 0x4c
+#define AC97C_SR 0x50
+#define AC97C_IER 0x54
+#define AC97C_IDR 0x58
+#define AC97C_IMR 0x5c
+#define AC97C_VERSION 0xfc
+
+#define AC97C_CATPR PDC_TPR
+#define AC97C_CATCR PDC_TCR
+#define AC97C_CATNPR PDC_TNPR
+#define AC97C_CATNCR PDC_TNCR
+#define AC97C_CARPR PDC_RPR
+#define AC97C_CARCR PDC_RCR
+#define AC97C_CARNPR PDC_RNPR
+#define AC97C_CARNCR PDC_RNCR
+#define AC97C_PTCR PDC_PTCR
+
+#define AC97C_MR_ENA (1 << 0)
+#define AC97C_MR_WRST (1 << 1)
+#define AC97C_MR_VRA (1 << 2)
+
+#define AC97C_CSR_TXRDY (1 << 0)
+#define AC97C_CSR_UNRUN (1 << 2)
+#define AC97C_CSR_RXRDY (1 << 4)
+#define AC97C_CSR_ENDTX (1 << 10)
+#define AC97C_CSR_ENDRX (1 << 14)
+
+#define AC97C_CMR_SIZE_20 (0 << 16)
+#define AC97C_CMR_SIZE_18 (1 << 16)
+#define AC97C_CMR_SIZE_16 (2 << 16)
+#define AC97C_CMR_SIZE_10 (3 << 16)
+#define AC97C_CMR_CEM_LITTLE (1 << 18)
+#define AC97C_CMR_CEM_BIG (0 << 18)
+#define AC97C_CMR_CENA (1 << 21)
+#define AC97C_CMR_PDCEN (1 << 22)
+
+#define AC97C_SR_CAEVT (1 << 3)
+
+#define AC97C_CH_ASSIGN(slot, channel) \
+ (AC97C_CHANNEL_##channel << (3 * (AC97_SLOT_##slot - 3)))
+#define AC97C_CHANNEL_NONE 0x0
+#define AC97C_CHANNEL_A 0x1
+#define AC97C_CHANNEL_B 0x2
+
+#endif /* __SOUND_AVR32_AC97C_H */
diff --exclude=.git -urN linux-2.6.25.6/sound/avr32/Kconfig avr32-2.6/sound/avr32/Kconfig
--- linux-2.6.25.6/sound/avr32/Kconfig 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/sound/avr32/Kconfig 2008-06-12 15:09:47.011815952 +0200
@@ -0,0 +1,11 @@
+menu "AVR32 devices"
+ depends on SND != n && AVR32
+
+config SND_ATMEL_AC97
+ tristate "Atmel AC97 Controller Driver"
+ select SND_PCM
+ select SND_AC97_CODEC
+ help
+ ALSA sound driver for the Atmel AC97 controller.
+
+endmenu
diff --exclude=.git -urN linux-2.6.25.6/sound/avr32/Makefile avr32-2.6/sound/avr32/Makefile
--- linux-2.6.25.6/sound/avr32/Makefile 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/sound/avr32/Makefile 2008-06-12 15:09:47.011815952 +0200
@@ -0,0 +1,3 @@
+snd-atmel-ac97-objs := ac97c.o
+
+obj-$(CONFIG_SND_ATMEL_AC97) += snd-atmel-ac97.o
diff --exclude=.git -urN linux-2.6.25.6/sound/Kconfig avr32-2.6/sound/Kconfig
--- linux-2.6.25.6/sound/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/sound/Kconfig 2008-06-12 15:09:47.011815952 +0200
@@ -63,6 +63,8 @@
source "sound/arm/Kconfig"
+source "sound/avr32/Kconfig"
+
if SPI
source "sound/spi/Kconfig"
endif
diff --exclude=.git -urN linux-2.6.25.6/sound/Makefile avr32-2.6/sound/Makefile
--- linux-2.6.25.6/sound/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/sound/Makefile 2008-06-12 15:09:47.011815952 +0200
@@ -6,7 +6,7 @@
obj-$(CONFIG_SOUND_PRIME) += oss/
obj-$(CONFIG_DMASOUND) += oss/
obj-$(CONFIG_SND) += core/ i2c/ drivers/ isa/ pci/ ppc/ arm/ sh/ synth/ usb/ \
- sparc/ spi/ parisc/ pcmcia/ mips/ soc/
+ sparc/ spi/ parisc/ pcmcia/ mips/ soc/ avr32/
obj-$(CONFIG_SND_AOA) += aoa/
# This one must be compilable even if sound is configured out
diff --exclude=.git -urN linux-2.6.25.6/sound/oss/at32_abdac.c avr32-2.6/sound/oss/at32_abdac.c
--- linux-2.6.25.6/sound/oss/at32_abdac.c 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/sound/oss/at32_abdac.c 2008-06-12 15:09:47.027815755 +0200
@@ -0,0 +1,722 @@
+/*
+ * OSS Sound Driver for the Atmel AT32 on-chip DAC.
+ *
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/sound.h>
+#include <linux/soundcard.h>
+
+#include <asm/byteorder.h>
+#include <asm/dma-controller.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+/* We want to use the "bizarre" swap-bytes-in-each-halfword macro */
+#include <linux/byteorder/swabb.h>
+
+#include "at32_abdac.h"
+
+#define DMA_BUFFER_SIZE 32768
+#define DMA_PERIOD_SHIFT 10
+#define DMA_PERIOD_SIZE (1 << DMA_PERIOD_SHIFT)
+#define DMA_WRITE_THRESHOLD DMA_PERIOD_SIZE
+
+struct sound_settings {
+ unsigned int format;
+ unsigned int channels;
+ unsigned int sample_rate;
+ /* log2(bytes per sample) */
+ unsigned int input_order;
+};
+
+struct at32_dac {
+ spinlock_t lock;
+ void __iomem *regs;
+
+ /* head and tail refer to number of words */
+ struct {
+ u32 *buf;
+ int head;
+ int tail;
+ } dma;
+
+ struct semaphore sem;
+ wait_queue_head_t write_wait;
+
+ /*
+ * Read at most ucount bytes from ubuf, translate to 2-channel
+ * signed 16-bit big endian format and write to the DMA buffer
+ * as long as there is room left. Return the number of bytes
+ * successfully copied from ubuf, or -EFAULT if the first
+ * sample from ubuf couldn't be read. This function is not
+ * called unless there is room for at least one sample (4
+ * bytes) in the DMA buffer.
+ */
+ ssize_t (*trans)(struct at32_dac *dac, const char __user *ubuf,
+ size_t ucount);
+
+ struct sound_settings dsp_settings;
+ struct dma_request_cyclic req;
+
+ struct clk *mck;
+ struct clk *sample_clk;
+ struct platform_device *pdev;
+ int busy;
+ int playing;
+ int dev_dsp;
+};
+static struct at32_dac *the_dac;
+
+static inline unsigned int abdac_get_head(struct at32_dac *dac)
+{
+ return dac->dma.head & ((DMA_BUFFER_SIZE / 4) - 1);
+}
+
+static inline unsigned int abdac_get_tail(struct at32_dac *dac)
+{
+ return dac->dma.tail & ((DMA_BUFFER_SIZE / 4) - 1);
+}
+
+static inline unsigned int abdac_dma_space(struct at32_dac *dac)
+{
+ unsigned int space;
+
+ space = ((dac->dma.tail - dac->dma.head - 1)
+ & ((DMA_BUFFER_SIZE / 4) - 1));
+ return space;
+}
+
+static void abdac_update_dma_tail(struct at32_dac *dac)
+{
+ dma_addr_t dma_addr;
+ unsigned int new_tail;
+
+ if (dac->playing) {
+ dma_addr = dma_get_current_pos(dac->req.req.dmac,
+ dac->req.req.channel);
+ new_tail = (dma_addr - dac->req.buffer_start) / 4;
+ if (new_tail >= dac->dma.head
+ && (dac->dma.tail < dac->dma.head
+ || dac->dma.tail > new_tail))
+ dev_notice(&dac->pdev->dev, "DMA underrun detected!\n");
+ dac->dma.tail = new_tail;
+ dev_dbg(&dac->pdev->dev, "update tail: 0x%x - 0x%x = %u\n",
+ dma_addr, dac->req.buffer_start, dac->dma.tail);
+ }
+}
+
+static int abdac_start(struct at32_dac *dac)
+{
+ int ret;
+
+ if (dac->playing)
+ return 0;
+
+ memset(dac->dma.buf, 0, DMA_BUFFER_SIZE);
+
+ clk_enable(dac->sample_clk);
+
+ ret = dma_prepare_request_cyclic(dac->req.req.dmac, &dac->req);
+ if (ret)
+ goto out_stop_clock;
+
+ dev_dbg(&dac->pdev->dev, "starting DMA...\n");
+ ret = dma_start_request(dac->req.req.dmac, dac->req.req.channel);
+ if (ret)
+ goto out_stop_request;
+
+ dac_writel(dac, CTRL, DAC_BIT(EN));
+ dac->playing = 1;
+
+ return 0;
+
+out_stop_request:
+ dma_stop_request(dac->req.req.dmac,
+ dac->req.req.channel);
+out_stop_clock:
+ clk_disable(dac->sample_clk);
+ return ret;
+}
+
+static int abdac_stop(struct at32_dac *dac)
+{
+ if (dac->playing) {
+ dma_stop_request(dac->req.req.dmac, dac->req.req.channel);
+ dac_writel(dac, DATA, 0);
+ dac_writel(dac, CTRL, 0);
+ dac->playing = 0;
+ clk_disable(dac->sample_clk);
+ }
+
+ return 0;
+}
+
+static int abdac_dma_prepare(struct at32_dac *dac)
+{
+ dac->dma.buf = dma_alloc_coherent(&dac->pdev->dev, DMA_BUFFER_SIZE,
+ &dac->req.buffer_start, GFP_KERNEL);
+ if (!dac->dma.buf)
+ return -ENOMEM;
+
+ dac->dma.head = dac->dma.tail = 0;
+ dac->req.periods = DMA_BUFFER_SIZE / DMA_PERIOD_SIZE;
+ dac->req.buffer_size = DMA_BUFFER_SIZE;
+
+ return 0;
+}
+
+static void abdac_dma_cleanup(struct at32_dac *dac)
+{
+ if (dac->dma.buf)
+ dma_free_coherent(&dac->pdev->dev, DMA_BUFFER_SIZE,
+ dac->dma.buf, dac->req.buffer_start);
+ dac->dma.buf = NULL;
+}
+
+static void abdac_dma_block_complete(struct dma_request *req)
+{
+ struct dma_request_cyclic *creq = to_dma_request_cyclic(req);
+ struct at32_dac *dac = container_of(creq, struct at32_dac, req);
+
+ wake_up(&dac->write_wait);
+}
+
+static void abdac_dma_error(struct dma_request *req)
+{
+ struct dma_request_cyclic *creq = to_dma_request_cyclic(req);
+ struct at32_dac *dac = container_of(creq, struct at32_dac, req);
+
+ dev_err(&dac->pdev->dev, "DMA error\n");
+}
+
+static irqreturn_t abdac_interrupt(int irq, void *dev_id)
+{
+ struct at32_dac *dac = dev_id;
+ u32 status;
+
+ status = dac_readl(dac, INT_STATUS);
+ if (status & DAC_BIT(UNDERRUN)) {
+ dev_err(&dac->pdev->dev, "Underrun detected!\n");
+ dac_writel(dac, INT_CLR, DAC_BIT(UNDERRUN));
+ } else {
+ dev_err(&dac->pdev->dev, "Spurious interrupt (status=0x%x)\n",
+ status);
+ dac_writel(dac, INT_CLR, status);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static ssize_t trans_s16be(struct at32_dac *dac, const char __user *ubuf,
+ size_t ucount)
+{
+ ssize_t ret;
+
+ if (dac->dsp_settings.channels == 2) {
+ const u32 __user *up = (const u32 __user *)ubuf;
+ u32 sample;
+
+ for (ret = 0; ret < (ssize_t)(ucount - 3); ret += 4) {
+ if (!abdac_dma_space(dac))
+ break;
+
+ if (unlikely(__get_user(sample, up++))) {
+ if (ret == 0)
+ ret = -EFAULT;
+ break;
+ }
+ dac->dma.buf[abdac_get_head(dac)] = sample;
+ dac->dma.head++;
+ }
+ } else {
+ const u16 __user *up = (const u16 __user *)ubuf;
+ u16 sample;
+
+ for (ret = 0; ret < (ssize_t)(ucount - 1); ret += 2) {
+ if (!abdac_dma_space(dac))
+ break;
+
+ if (unlikely(__get_user(sample, up++))) {
+ if (ret == 0)
+ ret = -EFAULT;
+ break;
+ }
+ dac->dma.buf[abdac_get_head(dac)]
+ = (sample << 16) | sample;
+ dac->dma.head++;
+ }
+ }
+
+ return ret;
+}
+
+static ssize_t trans_s16le(struct at32_dac *dac, const char __user *ubuf,
+ size_t ucount)
+{
+ ssize_t ret;
+
+ if (dac->dsp_settings.channels == 2) {
+ const u32 __user *up = (const u32 __user *)ubuf;
+ u32 sample;
+
+ for (ret = 0; ret < (ssize_t)(ucount - 3); ret += 4) {
+ if (!abdac_dma_space(dac))
+ break;
+
+ if (unlikely(__get_user(sample, up++))) {
+ if (ret == 0)
+ ret = -EFAULT;
+ break;
+ }
+ /* Swap bytes in each halfword */
+ dac->dma.buf[abdac_get_head(dac)] = swahb32(sample);
+ dac->dma.head++;
+ }
+ } else {
+ const u16 __user *up = (const u16 __user *)ubuf;
+ u16 sample;
+
+ for (ret = 0; ret < (ssize_t)(ucount - 1); ret += 2) {
+ if (!abdac_dma_space(dac))
+ break;
+
+ if (unlikely(__get_user(sample, up++))) {
+ if (ret == 0)
+ ret = -EFAULT;
+ break;
+ }
+ sample = swab16(sample);
+ dac->dma.buf[abdac_get_head(dac)]
+ = (sample << 16) | sample;
+ dac->dma.head++;
+ }
+ }
+
+ return ret;
+}
+
+static ssize_t abdac_dma_translate_from_user(struct at32_dac *dac,
+ const char __user *buffer,
+ size_t count)
+{
+ /* At least one buffer must be available at this point */
+ dev_dbg(&dac->pdev->dev, "copying %zu bytes from user...\n", count);
+
+ return dac->trans(dac, buffer, count);
+}
+
+static int abdac_set_format(struct at32_dac *dac, int format)
+{
+ unsigned int order;
+
+ switch (format) {
+ case AFMT_S16_BE:
+ order = 1;
+ dac->trans = trans_s16be;
+ break;
+ case AFMT_S16_LE:
+ order = 1;
+ dac->trans = trans_s16le;
+ break;
+ default:
+ dev_dbg(&dac->pdev->dev, "unsupported format: %d\n", format);
+ return -EINVAL;
+ }
+
+ if (dac->dsp_settings.channels == 2)
+ order++;
+
+ dac->dsp_settings.input_order = order;
+ dac->dsp_settings.format = format;
+ return 0;
+}
+
+static int abdac_set_sample_rate(struct at32_dac *dac, unsigned long rate)
+{
+ unsigned long new_rate;
+ int ret;
+
+ ret = clk_set_rate(dac->sample_clk, 256 * rate);
+ if (ret < 0)
+ return ret;
+
+ /* TODO: mplayer seems to have a problem with this */
+#if 0
+ new_rate = clk_get_rate(dac->sample_clk);
+ dac->dsp_settings.sample_rate = new_rate / 256;
+#else
+ dac->dsp_settings.sample_rate = rate;
+#endif
+
+ return 0;
+}
+
+static ssize_t abdac_dsp_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct at32_dac *dac = file->private_data;
+ DECLARE_WAITQUEUE(wait, current);
+ unsigned int avail;
+ ssize_t copied;
+ ssize_t ret;
+
+ /* Avoid address space checking in the translation functions */
+ if (!access_ok(buffer, count, VERIFY_READ))
+ return -EFAULT;
+
+ down(&dac->sem);
+
+ if (!dac->dma.buf) {
+ ret = abdac_dma_prepare(dac);
+ if (ret)
+ goto out;
+ }
+
+ add_wait_queue(&dac->write_wait, &wait);
+ ret = 0;
+ while (count > 0) {
+ do {
+ abdac_update_dma_tail(dac);
+ avail = abdac_dma_space(dac);
+ set_current_state(TASK_INTERRUPTIBLE);
+ if (avail >= DMA_WRITE_THRESHOLD)
+ break;
+
+ if (file->f_flags & O_NONBLOCK) {
+ if (!ret)
+ ret = -EAGAIN;
+ goto out;
+ }
+
+ pr_debug("Going to wait (avail = %u, count = %zu)\n",
+ avail, count);
+
+ up(&dac->sem);
+ schedule();
+ if (signal_pending(current)) {
+ if (!ret)
+ ret = -ERESTARTSYS;
+ goto out_nosem;
+ }
+ down(&dac->sem);
+ } while (1);
+
+ copied = abdac_dma_translate_from_user(dac, buffer, count);
+ if (copied < 0) {
+ if (!ret)
+ ret = -EFAULT;
+ goto out;
+ }
+
+ abdac_start(dac);
+
+ count -= copied;
+ ret += copied;
+ }
+
+out:
+ up(&dac->sem);
+out_nosem:
+ remove_wait_queue(&dac->write_wait, &wait);
+ set_current_state(TASK_RUNNING);
+ return ret;
+}
+
+static int abdac_dsp_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct at32_dac *dac = file->private_data;
+ int __user *up = (int __user *)arg;
+ struct audio_buf_info abinfo;
+ int val, ret;
+
+ switch (cmd) {
+ case OSS_GETVERSION:
+ return put_user(SOUND_VERSION, up);
+
+ case SNDCTL_DSP_SPEED:
+ if (get_user(val, up))
+ return -EFAULT;
+ if (val >= 0) {
+ abdac_stop(dac);
+ ret = abdac_set_sample_rate(dac, val);
+ if (ret)
+ return ret;
+ }
+ return put_user(dac->dsp_settings.sample_rate, up);
+
+ case SNDCTL_DSP_STEREO:
+ if (get_user(val, up))
+ return -EFAULT;
+ abdac_stop(dac);
+ if (val && dac->dsp_settings.channels == 1)
+ dac->dsp_settings.input_order++;
+ else if (!val && dac->dsp_settings.channels != 1)
+ dac->dsp_settings.input_order--;
+ dac->dsp_settings.channels = val ? 2 : 1;
+ return 0;
+
+ case SNDCTL_DSP_CHANNELS:
+ if (get_user(val, up))
+ return -EFAULT;
+
+ if (val) {
+ if (val < 0 || val > 2)
+ return -EINVAL;
+
+ abdac_stop(dac);
+ dac->dsp_settings.input_order
+ += val - dac->dsp_settings.channels;
+ dac->dsp_settings.channels = val;
+ }
+ return put_user(val, (int *)arg);
+
+ case SNDCTL_DSP_GETFMTS:
+ return put_user(AFMT_S16_BE | AFMT_S16_BE, up);
+
+ case SNDCTL_DSP_SETFMT:
+ if (get_user(val, up))
+ return -EFAULT;
+
+ if (val == AFMT_QUERY) {
+ val = dac->dsp_settings.format;
+ } else {
+ ret = abdac_set_format(dac, val);
+ if (ret)
+ return ret;
+ }
+ return put_user(val, up);
+
+ case SNDCTL_DSP_GETOSPACE:
+ abdac_update_dma_tail(dac);
+ abinfo.fragsize = ((1 << dac->dsp_settings.input_order)
+ * (DMA_PERIOD_SIZE / 4));
+ abinfo.bytes = (abdac_dma_space(dac)
+ << dac->dsp_settings.input_order);
+ abinfo.fragstotal = ((DMA_BUFFER_SIZE * 4)
+ >> (DMA_PERIOD_SHIFT
+ + dac->dsp_settings.input_order));
+ abinfo.fragments = ((abinfo.bytes
+ >> dac->dsp_settings.input_order)
+ / (DMA_PERIOD_SIZE / 4));
+ pr_debug("fragments=%d fragstotal=%d fragsize=%d bytes=%d\n",
+ abinfo.fragments, abinfo.fragstotal, abinfo.fragsize,
+ abinfo.bytes);
+ return copy_to_user(up, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
+
+ default:
+ dev_dbg(&dac->pdev->dev, "Unimplemented ioctl cmd: 0x%x\n", cmd);
+ return -EINVAL;
+ }
+}
+
+static int abdac_dsp_open(struct inode *inode, struct file *file)
+{
+ struct at32_dac *dac = the_dac;
+ int ret;
+
+ if (file->f_mode & FMODE_READ)
+ return -ENXIO;
+
+ down(&dac->sem);
+ ret = -EBUSY;
+ if (dac->busy)
+ goto out;
+
+ dac->dma.head = dac->dma.tail = 0;
+
+ /* FIXME: What are the correct defaults? */
+ dac->dsp_settings.channels = 2;
+ abdac_set_format(dac, AFMT_S16_BE);
+ ret = abdac_set_sample_rate(dac, 8000);
+ if (ret)
+ goto out;
+
+ file->private_data = dac;
+ dac->busy = 1;
+
+ ret = 0;
+
+out:
+ up(&dac->sem);
+ return ret;
+}
+
+static int abdac_dsp_release(struct inode *inode, struct file *file)
+{
+ struct at32_dac *dac = file->private_data;
+
+ down(&dac->sem);
+
+ abdac_stop(dac);
+ abdac_dma_cleanup(dac);
+ dac->busy = 0;
+
+ up(&dac->sem);
+
+ return 0;
+}
+
+static struct file_operations abdac_dsp_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .write = abdac_dsp_write,
+ .ioctl = abdac_dsp_ioctl,
+ .open = abdac_dsp_open,
+ .release = abdac_dsp_release,
+};
+
+static int __init abdac_probe(struct platform_device *pdev)
+{
+ struct at32_dac *dac;
+ struct resource *regs;
+ struct clk *mck;
+ struct clk *sample_clk;
+ int irq;
+ int ret;
+
+ if (the_dac)
+ return -EBUSY;
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs)
+ return -ENXIO;
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ mck = clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(mck))
+ return PTR_ERR(mck);
+ sample_clk = clk_get(&pdev->dev, "sample_clk");
+ if (IS_ERR(sample_clk)) {
+ ret = PTR_ERR(sample_clk);
+ goto out_put_mck;
+ }
+ clk_enable(mck);
+
+ ret = -ENOMEM;
+ dac = kzalloc(sizeof(struct at32_dac), GFP_KERNEL);
+ if (!dac)
+ goto out_disable_clk;
+
+ spin_lock_init(&dac->lock);
+ init_MUTEX(&dac->sem);
+ init_waitqueue_head(&dac->write_wait);
+ dac->pdev = pdev;
+ dac->mck = mck;
+ dac->sample_clk = sample_clk;
+
+ dac->regs = ioremap(regs->start, regs->end - regs->start + 1);
+ if (!dac->regs)
+ goto out_free_dac;
+
+ ret = request_irq(irq, abdac_interrupt, 0, "dac", dac);
+ if (ret)
+ goto out_unmap_regs;
+
+ /* FIXME */
+ dac->req.req.dmac = find_dma_controller(0);
+ if (!dac->req.req.dmac)
+ goto out_free_irq;
+
+ ret = dma_alloc_channel(dac->req.req.dmac);
+ if (ret < 0)
+ goto out_free_irq;
+
+ dac->req.req.channel = ret;
+ dac->req.req.block_complete = abdac_dma_block_complete;
+ dac->req.req.error = abdac_dma_error;
+ dac->req.data_reg = regs->start + DAC_DATA;
+ dac->req.periph_id = 2; /* FIXME */
+ dac->req.direction = DMA_DIR_MEM_TO_PERIPH;
+ dac->req.width = DMA_WIDTH_32BIT;
+
+ /* Make sure the DAC is silent and disabled */
+ dac_writel(dac, DATA, 0);
+ dac_writel(dac, CTRL, 0);
+
+ ret = register_sound_dsp(&abdac_dsp_fops, -1);
+ if (ret < 0)
+ goto out_free_dma;
+ dac->dev_dsp = ret;
+
+ /* TODO: Register mixer */
+
+ the_dac = dac;
+ platform_set_drvdata(pdev, dac);
+
+ return 0;
+
+out_free_dma:
+ dma_release_channel(dac->req.req.dmac, dac->req.req.channel);
+out_free_irq:
+ free_irq(irq, dac);
+out_unmap_regs:
+ iounmap(dac->regs);
+out_free_dac:
+ kfree(dac);
+out_disable_clk:
+ clk_disable(mck);
+ clk_put(sample_clk);
+out_put_mck:
+ clk_put(mck);
+ return ret;
+}
+
+static int __exit abdac_remove(struct platform_device *pdev)
+{
+ struct at32_dac *dac;
+
+ dac = platform_get_drvdata(pdev);
+ if (dac) {
+ unregister_sound_dsp(dac->dev_dsp);
+ dma_release_channel(dac->req.req.dmac, dac->req.req.channel);
+ free_irq(platform_get_irq(pdev, 0), dac);
+ iounmap(dac->regs);
+ clk_disable(dac->mck);
+ clk_put(dac->sample_clk);
+ clk_put(dac->mck);
+ kfree(dac);
+ platform_set_drvdata(pdev, NULL);
+ the_dac = NULL;
+ }
+
+ return 0;
+}
+
+static struct platform_driver abdac_driver = {
+ .remove = __exit_p(abdac_remove),
+ .driver = {
+ .name = "abdac",
+ },
+};
+
+static int __init abdac_init(void)
+{
+ return platform_driver_probe(&abdac_driver, abdac_probe);
+}
+module_init(abdac_init);
+
+static void __exit abdac_exit(void)
+{
+ platform_driver_unregister(&abdac_driver);
+}
+module_exit(abdac_exit);
+
+MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>");
+MODULE_DESCRIPTION("Sound Driver for the Atmel AT32 ABDAC");
+MODULE_LICENSE("GPL");
diff --exclude=.git -urN linux-2.6.25.6/sound/oss/at32_abdac.h avr32-2.6/sound/oss/at32_abdac.h
--- linux-2.6.25.6/sound/oss/at32_abdac.h 1970-01-01 01:00:00.000000000 +0100
+++ avr32-2.6/sound/oss/at32_abdac.h 2008-06-12 15:09:47.027815755 +0200
@@ -0,0 +1,59 @@
+/*
+ * Register definitions for the Atmel AT32 on-chip DAC.
+ *
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __SOUND_OSS_AT32_ABDAC_H__
+#define __SOUND_OSS_AT32_ABDAC_H__
+
+/* DAC register offsets */
+#define DAC_DATA 0x0000
+#define DAC_CTRL 0x0008
+#define DAC_INT_MASK 0x000c
+#define DAC_INT_EN 0x0010
+#define DAC_INT_DIS 0x0014
+#define DAC_INT_CLR 0x0018
+#define DAC_INT_STATUS 0x001c
+#define DAC_PDC_DATA 0x0020
+
+/* Bitfields in CTRL */
+#define DAC_SWAP_OFFSET 30
+#define DAC_SWAP_SIZE 1
+#define DAC_EN_OFFSET 31
+#define DAC_EN_SIZE 1
+
+/* Bitfields in INT_MASK/INT_EN/INT_DIS/INT_STATUS/INT_CLR */
+#define DAC_UNDERRUN_OFFSET 28
+#define DAC_UNDERRUN_SIZE 1
+#define DAC_TX_READY_OFFSET 29
+#define DAC_TX_READY_SIZE 1
+#define DAC_TX_BUFFER_EMPTY_OFFSET 30
+#define DAC_TX_BUFFER_EMPTY_SIZE 1
+#define DAC_CHANNEL_TX_END_OFFSET 31
+#define DAC_CHANNEL_TX_END_SIZE 1
+
+/* Bit manipulation macros */
+#define DAC_BIT(name) \
+ (1 << DAC_##name##_OFFSET)
+#define DAC_BF(name, value) \
+ (((value) & ((1 << DAC_##name##_SIZE) - 1)) \
+ << DAC_##name##_OFFSET)
+#define DAC_BFEXT(name, value) \
+ (((value) >> DAC_##name##_OFFSET) \
+ & ((1 << DAC_##name##_SIZE) - 1))
+#define DAC_BFINS(name, value, old) \
+ (((old) & ~(((1 << DAC_##name##_SIZE) - 1) \
+ << DAC_##name##_OFFSET)) \
+ | DAC_BF(name,value))
+
+/* Register access macros */
+#define dac_readl(port, reg) \
+ __raw_readl((port)->regs + DAC_##reg)
+#define dac_writel(port, reg, value) \
+ __raw_writel((value), (port)->regs + DAC_##reg)
+
+#endif /* __SOUND_OSS_AT32_ABDAC_H__ */
diff --exclude=.git -urN linux-2.6.25.6/sound/oss/Kconfig avr32-2.6/sound/oss/Kconfig
--- linux-2.6.25.6/sound/oss/Kconfig 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/sound/oss/Kconfig 2008-06-12 15:09:47.023815804 +0200
@@ -654,3 +654,7 @@
int "DAC channel"
default "1"
depends on SOUND_SH_DAC_AUDIO
+
+config SOUND_AT32_ABDAC
+ tristate "Atmel AT32 Audio Bitstream DAC (ABDAC) support"
+ depends on SOUND_PRIME && AVR32
diff --exclude=.git -urN linux-2.6.25.6/sound/oss/Makefile avr32-2.6/sound/oss/Makefile
--- linux-2.6.25.6/sound/oss/Makefile 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/sound/oss/Makefile 2008-06-12 15:09:47.023815804 +0200
@@ -9,6 +9,7 @@
# Please leave it as is, cause the link order is significant !
+obj-$(CONFIG_SOUND_AT32_ABDAC) += at32_abdac.o
obj-$(CONFIG_SOUND_SH_DAC_AUDIO) += sh_dac_audio.o
obj-$(CONFIG_SOUND_HAL2) += hal2.o
obj-$(CONFIG_SOUND_AEDSP16) += aedsp16.o
diff --exclude=.git -urN linux-2.6.25.6/sound/spi/at73c213.c avr32-2.6/sound/spi/at73c213.c
--- linux-2.6.25.6/sound/spi/at73c213.c 2008-06-09 20:27:19.000000000 +0200
+++ avr32-2.6/sound/spi/at73c213.c 2008-06-12 15:09:47.247815006 +0200
@@ -737,7 +737,7 @@
/*
* Device functions
*/
-static int snd_at73c213_ssc_init(struct snd_at73c213 *chip)
+static int __devinit snd_at73c213_ssc_init(struct snd_at73c213 *chip)
{
/*
* Continuous clock output.
@@ -767,7 +767,7 @@
return 0;
}
-static int snd_at73c213_chip_init(struct snd_at73c213 *chip)
+static int __devinit snd_at73c213_chip_init(struct snd_at73c213 *chip)
{
int retval;
unsigned char dac_ctrl = 0;
@@ -933,7 +933,7 @@
return retval;
}
-static int snd_at73c213_probe(struct spi_device *spi)
+static int __devinit snd_at73c213_probe(struct spi_device *spi)
{
struct snd_card *card;
struct snd_at73c213 *chip;
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