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remove custom partition table hack, add ptgen utility for generating partition tables

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SVN-Revision: 5704
This commit is contained in:
Felix Fietkau 2006-12-07 00:26:26 +00:00
parent a1e6799797
commit cf52f51b85
6 changed files with 238 additions and 327 deletions
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1
target/linux/rb532-2.6/config
View file

@ -1180,7 +1180,6 @@ CONFIG_CIFS=m
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
CONFIG_OPENWRT_PARTITION=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set

16
target/linux/rb532-2.6/image/Makefile
View file

@ -39,9 +39,6 @@ define Image/BuildKernel
$(CP) $(KDIR)/loader.elf $(BIN_DIR)/openwrt-$(BOARD)-$(KERNEL)-vmlinux
endef
PARTITION1=\x80\x01\x01\x00\x27\x01\x20\x7b\x20\x00\x00\x00\xe0\x1e\x00\x00# 4 MB (kernel part)
PARTITION2=\x00\x00\x01\x7c\x83\x01\xa0\x64\x00\x1f\x00\x00\x40\x7a\x00\x00# 16 MB (rootfs part)
define Image/cmdline/jffs2-64k
block2mtd.block2mtd=/dev/cfa2,65536 root=/dev/mtdblock0 rootfstype=jffs2
endef
@ -56,18 +53,7 @@ endef
define Image/Build
$(STAGING_DIR)/bin/patch-cmdline $(LINUX_DIR)/vmlinux '$(strip $(call Image/cmdline/$(1))) '
( \
echo -ne OWRT | dd bs=$$$$((0x1be)) conv=sync; \
( \
echo -ne '$(strip $(PARTITION1))'; \
echo -ne '$(strip $(PARTITION2))'; \
) | dd bs=$$$$((0x40)) conv=sync; \
echo -ne '\x55\xaa'; \
dd if=/dev/zero bs=$$$$((0x3e00)) conv=sync count=1; \
dd if=$(LINUX_DIR)/vmlinux bs=$$$$((0x3dc000)) conv=sync; \
cat $(KDIR)/root.$(1); \
echo -ne '\xde\xad\xc0\xde'; \
) > $(BIN_DIR)/openwrt-$(BOARD)-$(KERNEL)-$(1).bin
./gen_image.sh $(BIN_DIR)/openwrt-$(BOARD)-$(KERNEL)-$(1).bin 4 $(LINUX_DIR)/vmlinux 16 $(KDIR)/root.$(1)
endef
$(eval $(call BuildImage))

17
target/linux/rb532-2.6/image/gen_image.sh Executable file
View file

@ -0,0 +1,17 @@
#!/usr/bin/env bash
OUTPUT="$1"
KERNELSIZE="$2"
KERNELIMAGE="$3"
ROOTFSSIZE="$4"
ROOTFSIMAGE="$5"
rm -f "$OUTPUT"
# create partition table
set `ptgen -o "$OUTPUT" -h 16 -s 32 -t 0x27 -p ${KERNELSIZE}m -t 0x83 -p ${ROOTFSSIZE}m`
KERNELOFFSET="$(($1 / 512))"
ROOTFSOFFSET="$(($2 / 512))"
dd if="$KERNELIMAGE" of="$OUTPUT" bs=512 conv=notrunc seek="$KERNELOFFSET"
dd if="$ROOTFSIMAGE" of="$OUTPUT" bs=512 conv=notrunc seek="$ROOTFSOFFSET"

311
target/linux/rb532-2.6/patches/130-custom_partitions.patch
View file

@ -1,311 +0,0 @@
diff -urN linux.old/fs/partitions/check.c linux.dev/fs/partitions/check.c
--- linux.old/fs/partitions/check.c 2006-05-31 02:31:44.000000000 +0200
+++ linux.dev/fs/partitions/check.c 2006-06-15 01:27:17.000000000 +0200
@@ -29,6 +29,7 @@
#include "ldm.h"
#include "mac.h"
#include "msdos.h"
+#include "openwrt.h"
#include "osf.h"
#include "sgi.h"
#include "sun.h"
@@ -48,6 +49,9 @@
* Probe partition formats with tables at disk address 0
* that also have an ADFS boot block at 0xdc0.
*/
+#ifdef CONFIG_OPENWRT_PARTITION
+ openwrt_partition,
+#endif
#ifdef CONFIG_ACORN_PARTITION_ICS
adfspart_check_ICS,
#endif
diff -urN linux.old/fs/partitions/Kconfig linux.dev/fs/partitions/Kconfig
--- linux.old/fs/partitions/Kconfig 2006-05-31 02:31:44.000000000 +0200
+++ linux.dev/fs/partitions/Kconfig 2006-06-15 01:27:17.000000000 +0200
@@ -14,6 +14,12 @@
If unsure, say N.
+config OPENWRT_PARTITION
+ bool "OpenWrt partition support" if PARTITION_ADVANCED
+ default y
+ help
+ Support the custom OpenWrt partition map
+
config ACORN_PARTITION
bool "Acorn partition support" if PARTITION_ADVANCED
default y if ARCH_ACORN
diff -urN linux.old/fs/partitions/Makefile linux.dev/fs/partitions/Makefile
--- linux.old/fs/partitions/Makefile 2006-05-31 02:31:44.000000000 +0200
+++ linux.dev/fs/partitions/Makefile 2006-06-15 01:27:17.000000000 +0200
@@ -11,6 +11,7 @@
obj-$(CONFIG_MAC_PARTITION) += mac.o
obj-$(CONFIG_LDM_PARTITION) += ldm.o
obj-$(CONFIG_MSDOS_PARTITION) += msdos.o
+obj-$(CONFIG_OPENWRT_PARTITION) += openwrt.o
obj-$(CONFIG_OSF_PARTITION) += osf.o
obj-$(CONFIG_SGI_PARTITION) += sgi.o
obj-$(CONFIG_SUN_PARTITION) += sun.o
diff -urN linux.old/fs/partitions/openwrt.c linux.dev/fs/partitions/openwrt.c
--- linux.old/fs/partitions/openwrt.c 1970-01-01 01:00:00.000000000 +0100
+++ linux.dev/fs/partitions/openwrt.c 2006-06-15 01:27:17.000000000 +0200
@@ -0,0 +1,249 @@
+/*
+ * fs/partitions/openwrt.c
+ *
+ * Code extracted from drivers/block/genhd.c
+ * and fs/partitions/msdos.c
+ *
+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 1991-1998 Linus Torvalds
+ *
+ * Thanks to Branko Lankester, lankeste@fwi.uva.nl, who found a bug
+ * in the early extended-partition checks and added DM partitions
+ *
+ * Support for DiskManager v6.0x added by Mark Lord,
+ * with information provided by OnTrack. This now works for linux fdisk
+ * and LILO, as well as loadlin and bootln. Note that disks other than
+ * /dev/hda *must* have a "DOS" type 0x51 partition in the first slot (hda1).
+ *
+ * More flexible handling of extended partitions - aeb, 950831
+ *
+ * Check partition table on IDE disks for common CHS translations
+ *
+ * Re-organised Feb 1998 Russell King
+ */
+
+#include <linux/config.h>
+
+#include "check.h"
+#include "openwrt.h"
+
+/*
+ * Many architectures don't like unaligned accesses, while
+ * the nr_sects and start_sect partition table entries are
+ * at a 2 (mod 4) address.
+ */
+#include <asm/unaligned.h>
+
+#define SYS_IND(p) (get_unaligned(&p->sys_ind))
+#define NR_SECTS(p) ({ __typeof__(p->nr_sects) __a = \
+ get_unaligned(&p->nr_sects); \
+ le32_to_cpu(__a); \
+ })
+
+#define START_SECT(p) ({ __typeof__(p->start_sect) __a = \
+ get_unaligned(&p->start_sect); \
+ le32_to_cpu(__a); \
+ })
+
+static inline int is_extended_partition(struct partition *p)
+{
+ return (SYS_IND(p) == DOS_EXTENDED_PARTITION ||
+ SYS_IND(p) == WIN98_EXTENDED_PARTITION ||
+ SYS_IND(p) == LINUX_EXTENDED_PARTITION);
+}
+
+#define MSDOS_LABEL_MAGIC1 0x55
+#define MSDOS_LABEL_MAGIC2 0xAA
+
+static inline int
+msdos_magic_present(unsigned char *p)
+{
+ return (p[0] == MSDOS_LABEL_MAGIC1 && p[1] == MSDOS_LABEL_MAGIC2);
+}
+
+static inline int
+openwrt_magic_present(unsigned char *p)
+{
+ return (p[0] == 'O' &&
+ p[1] == 'W' &&
+ p[2] == 'R' &&
+ p[3] == 'T');
+}
+
+/*
+ * Create devices for each logical partition in an extended partition.
+ * The logical partitions form a linked list, with each entry being
+ * a partition table with two entries. The first entry
+ * is the real data partition (with a start relative to the partition
+ * table start). The second is a pointer to the next logical partition
+ * (with a start relative to the entire extended partition).
+ * We do not create a Linux partition for the partition tables, but
+ * only for the actual data partitions.
+ */
+
+static void
+parse_extended(struct parsed_partitions *state, struct block_device *bdev,
+ u32 first_sector, u32 first_size)
+{
+ struct partition *p;
+ Sector sect;
+ unsigned char *data;
+ u32 this_sector, this_size;
+ int sector_size = bdev_hardsect_size(bdev) / 512;
+ int loopct = 0; /* number of links followed
+ without finding a data partition */
+ int i;
+
+ this_sector = first_sector;
+ this_size = first_size;
+
+ while (1) {
+ if (++loopct > 100)
+ return;
+ if (state->next == state->limit)
+ return;
+ data = read_dev_sector(bdev, this_sector, &sect);
+ if (!data)
+ return;
+
+ if (!msdos_magic_present(data + 510))
+ goto done;
+
+ p = (struct partition *) (data + 0x1be);
+
+ /*
+ * Usually, the first entry is the real data partition,
+ * the 2nd entry is the next extended partition, or empty,
+ * and the 3rd and 4th entries are unused.
+ * However, DRDOS sometimes has the extended partition as
+ * the first entry (when the data partition is empty),
+ * and OS/2 seems to use all four entries.
+ */
+
+ /*
+ * First process the data partition(s)
+ */
+ for (i=0; i<4; i++, p++) {
+ u32 offs, size, next;
+ if (!NR_SECTS(p) || is_extended_partition(p))
+ continue;
+
+ /* Check the 3rd and 4th entries -
+ these sometimes contain random garbage */
+ offs = START_SECT(p)*sector_size;
+ size = NR_SECTS(p)*sector_size;
+ next = this_sector + offs;
+ if (i >= 2) {
+ if (offs + size > this_size)
+ continue;
+ if (next < first_sector)
+ continue;
+ if (next + size > first_sector + first_size)
+ continue;
+ }
+
+ put_partition(state, state->next, next, size);
+ if (SYS_IND(p) == LINUX_RAID_PARTITION)
+ state->parts[state->next].flags = 1;
+ loopct = 0;
+ if (++state->next == state->limit)
+ goto done;
+ }
+ /*
+ * Next, process the (first) extended partition, if present.
+ * (So far, there seems to be no reason to make
+ * parse_extended() recursive and allow a tree
+ * of extended partitions.)
+ * It should be a link to the next logical partition.
+ */
+ p -= 4;
+ for (i=0; i<4; i++, p++)
+ if (NR_SECTS(p) && is_extended_partition(p))
+ break;
+ if (i == 4)
+ goto done; /* nothing left to do */
+
+ this_sector = first_sector + START_SECT(p) * sector_size;
+ this_size = NR_SECTS(p) * sector_size;
+ put_dev_sector(sect);
+ }
+done:
+ put_dev_sector(sect);
+}
+
+
+int openwrt_partition(struct parsed_partitions *state, struct block_device *bdev)
+{
+ int sector_size = bdev_hardsect_size(bdev) / 512;
+ Sector sect;
+ unsigned char *data;
+ struct partition *p;
+ int slot;
+ u32 last_block = 0;
+ u32 size = 0;
+ int firstfree = 5;
+
+ data = read_dev_sector(bdev, 0, &sect);
+ if (!data)
+ return -1;
+ if (!openwrt_magic_present(data)) {
+ printk("No OpenWrt partition table detected\n");
+ put_dev_sector(sect);
+ return 0;
+ }
+
+ /*
+ * Now that the 55aa signature is present, this is probably
+ * either the boot sector of a FAT filesystem or a DOS-type
+ * partition table. Reject this in case the boot indicator
+ * is not 0 or 0x80.
+ */
+ p = (struct partition *) (data + 0x1be);
+ for (slot = 1; slot <= 4; slot++, p++) {
+ if (p->boot_ind != 0 && p->boot_ind != 0x80) {
+ put_dev_sector(sect);
+ return 0;
+ }
+ }
+
+ p = (struct partition *) (data + 0x1be);
+
+ /*
+ * Look for partitions in two passes:
+ * First find the primary and DOS-type extended partitions.
+ */
+
+ state->next = 6;
+ for (slot = 1 ; slot <= 4 ; slot++, p++) {
+ u32 start = START_SECT(p)*sector_size;
+ size = NR_SECTS(p)*sector_size;
+ if (!size) {
+ if (firstfree > slot)
+ firstfree = slot;
+
+ continue;
+ }
+ if (is_extended_partition(p)) {
+ /* prevent someone doing mkfs or mkswap on an
+ extended partition, but leave room for LILO */
+ last_block = start + size;
+ put_partition(state, slot, start, size == 1 ? 1 : 2);
+ printk(" <");
+ parse_extended(state, bdev, start, size);
+ printk(" >");
+ continue;
+ }
+ if ((start + size) > get_capacity(bdev->bd_disk))
+ size = get_capacity(bdev->bd_disk) - start;
+ last_block = start + size;
+ put_partition(state, slot, start, size);
+ }
+ if (last_block + 1024 < (size = get_capacity(bdev->bd_disk)))
+ put_partition(state, firstfree, last_block, size - last_block);
+
+ printk("\n");
+
+ put_dev_sector(sect);
+ return 1;
+}
+
diff -urN linux.old/fs/partitions/openwrt.h linux.dev/fs/partitions/openwrt.h
--- linux.old/fs/partitions/openwrt.h 1970-01-01 01:00:00.000000000 +0100
+++ linux.dev/fs/partitions/openwrt.h 2006-06-15 01:27:17.000000000 +0200
@@ -0,0 +1,6 @@
+/*
+ * fs/partitions/openwrt.h
+ */
+
+int openwrt_partition(struct parsed_partitions *state, struct block_device *bdev);
+

1
tools/firmware-utils/Makefile
View file

@ -23,6 +23,7 @@ define Build/Compile
$(call cc,motorola-bin)
$(call cc,dgfirmware)
$(call cc,trx2usr)
$(call cc,ptgen)
endef
define Build/Install

219
tools/firmware-utils/src/ptgen.c Normal file
View file

@ -0,0 +1,219 @@
/*
* ptgen - partition table generator
* Copyright (C) 2006 by Felix Fietkau <nbd@openwrt.org>
*
* uses parts of afdisk
* Copyright (C) 2002 by David Roetzel <david@roetzel.de>
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <fcntl.h>
#if __BYTE_ORDER == __BIG_ENDIAN
#define cpu_to_le16(x) bswap_16(x)
#elif __BYTE_ORDER == __LITTLE_ENDIAN
#define cpu_to_le16(x) (x)
#else
#error unknown endianness!
#endif
/* Partition table entry */
struct pte {
unsigned char active;
unsigned char chs_start[3];
unsigned char type;
unsigned char chs_end[3];
unsigned int start;
unsigned int length;
};
struct partinfo {
unsigned long size;
int type;
};
int verbose = 0;
int active = 1;
int heads = -1;
int sectors = -1;
struct partinfo parts[4];
char *filename = NULL;
/*
* parse the size argument, which is either
* a simple number (K assumed) or
* K, M or G
*
* returns the size in KByte
*/
static long to_kbytes(const char *string) {
int exp = 0;
long result;
char *end;
result = strtoul(string, &end, 0);
switch (tolower(*end)) {
case 'k' :
case '\0' : exp = 0; break;
case 'm' : exp = 1; break;
case 'g' : exp = 2; break;
default: return 0;
}
if (*end)
end++;
if (*end) {
fprintf(stderr, "garbage after end of number\n");
return 0;
}
/* result: number + 1024^(exp) */
return result * ((2 << ((10 * exp) - 1)) ?: 1);
}
/* convert the sector number into a CHS value for the partition table */
static void to_chs(long sect, unsigned char chs[3]) {
int c,h,s;
s = (sect % sectors) + 1;
sect = sect / sectors;
h = sect % heads;
sect = sect / heads;
c = sect;
chs[0] = h;
chs[1] = s | ((c >> 2) & 0xC0);
chs[2] = c & 0xFF;
return;
}
/* round the sector number up to the next cylinder */
static inline unsigned long round_to_cyl(long sect) {
int cyl_size = heads * sectors;
return sect + cyl_size - ((sect % cyl_size) ?: cyl_size);
}
/* check the partition sizes and write the partition table */
static int gen_ptable(int nr)
{
struct pte pte[4];
unsigned long sect = 0;
int i, fd, ret = -1, start, len;
memset(pte, 0, sizeof(struct pte) * 4);
for (i = 0; i < nr; i++) {
if (!parts[i].size) {
fprintf(stderr, "Invalid size in partition %d!\n", i);
return -1;
}
pte[i].active = ((i + 1) == active) ? 0x80 : 0;
pte[i].type = parts[i].type;
pte[i].start = cpu_to_le16(start = sect + sectors);
sect = round_to_cyl(start + parts[i].size * 2);
pte[i].length = cpu_to_le16(len = sect - start);
to_chs(start, pte[i].chs_start);
to_chs(start + len - 1, pte[i].chs_end);
if (verbose)
fprintf(stderr, "Partition %d: start=%ld, end=%ld, size=%ld\n", i, (long) start * 512, ((long) start + (long) len) * 512, (long) len * 512);
printf("%ld\n", ((long) start * 512));
}
if ((fd = open(filename, O_WRONLY|O_CREAT, 0644)) < 0) {
fprintf(stderr, "Can't open output file '%s'\n",filename);
return -1;
}
lseek(fd, 446, SEEK_SET);
if (write(fd, pte, sizeof(struct pte) * 4) != sizeof(struct pte) * 4) {
fprintf(stderr, "write failed.\n");
goto fail;
}
lseek(fd, 510, SEEK_SET);
if (write(fd, "\x55\xaa", 2) != 2) {
fprintf(stderr, "write failed.\n");
goto fail;
}
ret = 0;
fail:
close(fd);
return ret;
}
static void usage(char *prog)
{
fprintf(stderr, "Usage: %s [-v] -h <heads> -s <sectors> -o <outputfile> [-a 0..4] [[-t <type>] -p <size>...] \n", prog);
exit(1);
}
int main (int argc, char **argv)
{
char type = 0x83;
int ch;
int part = 0;
while ((ch = getopt(argc, argv, "h:s:p:a:t:o:v")) != -1) {
switch (ch) {
case 'o':
filename = optarg;
break;
case 'v':
verbose++;
break;
case 'h':
heads = (int) strtoul(optarg, NULL, 0);
break;
case 's':
sectors = (int) strtoul(optarg, NULL, 0);
break;
case 'p':
if (part > 3) {
fprintf(stderr, "Too many partitions\n");
exit(1);
}
parts[part].size = to_kbytes(optarg);
parts[part++].type = type;
break;
case 't':
type = (char) strtoul(optarg, NULL, 16);
break;
case 'a':
active = (int) strtoul(optarg, NULL, 0);
if ((active < 0) || (active > 4))
active = 0;
break;
case '?':
default:
usage(argv[0]);
}
}
argc -= optind;
if (argc || (heads <= 0) || (sectors <= 0) || !filename)
usage(argv[0]);
return gen_ptable(part);
}