2521 lines
84 KiB
Diff
2521 lines
84 KiB
Diff
diff -Nurb src/linux/linux.orig/Makefile src/linux/linux/Makefile
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--- src/linux/linux.orig/Makefile 2003-10-14 04:00:10.000000000 -0400
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+++ src/linux/linux/Makefile 2004-05-25 21:12:24.000000000 -0400
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@@ -17,7 +17,7 @@
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FINDHPATH = $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net $(HPATH)/math-emu
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HOSTCC = gcc
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-HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
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+HOSTCFLAGS = -Wall -Wstrict-prototypes -Os -fomit-frame-pointer
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CROSS_COMPILE =
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@@ -88,7 +88,7 @@
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CPPFLAGS := -D__KERNEL__ -I$(HPATH)
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-CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
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+CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
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-fno-strict-aliasing -fno-common
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# Turn on -pg to instrument the kernel with calls to mcount().
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diff -Nurb src/linux/linux.orig/arch/mips/brcm-boards/bcm947xx/setup.c src/linux/linux/arch/mips/brcm-boards/bcm947xx/setup.c
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--- src/linux/linux.orig/arch/mips/brcm-boards/bcm947xx/setup.c 2003-11-11 09:08:46.000000000 -0500
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+++ src/linux/linux/arch/mips/brcm-boards/bcm947xx/setup.c 2004-05-25 21:12:24.000000000 -0400
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@@ -27,6 +27,7 @@
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#include <linux/ext2_fs.h>
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#include <linux/romfs_fs.h>
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#include <linux/cramfs_fs.h>
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+#include <linux/squashfs_fs.h>
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#endif
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#include <typedefs.h>
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@@ -160,37 +161,38 @@
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#ifdef CONFIG_MTD_PARTITIONS
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static struct mtd_partition bcm947xx_parts[] = {
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- { name: "pmon", offset: 0, size: 0, /*mask_flags: MTD_WRITEABLE,*/ },
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+ { name: "pmon", offset: 0, size: 0, mask_flags: MTD_WRITEABLE, },
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{ name: "linux", offset: 0, size: 0, },
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{ name: "rootfs", offset: 0, size: 0, /*mask_flags: MTD_WRITEABLE,*/ },
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{ name: "nvram", offset: 0, size: 0, },
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+ { name: "OpenWrt", offset: 0, size: 0, },
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{ name: NULL, },
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};
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-struct mtd_partition * __init
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-init_mtd_partitions(struct mtd_info *mtd, size_t size)
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+
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+static int __init
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+find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
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{
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- struct minix_super_block *minixsb;
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- struct ext2_super_block *ext2sb;
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- struct romfs_super_block *romfsb;
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struct cramfs_super *cramfsb;
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+ struct squashfs_super_block *squashfsb;
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struct trx_header *trx;
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+
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unsigned char buf[512];
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int off;
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size_t len;
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- minixsb = (struct minix_super_block *) buf;
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- ext2sb = (struct ext2_super_block *) buf;
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- romfsb = (struct romfs_super_block *) buf;
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cramfsb = (struct cramfs_super *) buf;
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+ squashfsb = (struct squashfs_super_block *) buf;
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trx = (struct trx_header *) buf;
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- /* Look at every 64 KB boundary */
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- for (off = 0; off < size; off += (64 * 1024)) {
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+ part->offset = 0;
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+ part->size = 0;
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+
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+ for (off = 0; off < size; off += mtd->erasesize) {
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memset(buf, 0xe5, sizeof(buf));
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/*
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- * Read block 0 to test for romfs and cramfs superblock
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+ * Read block 0 to test for cramfs superblock
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*/
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if (MTD_READ(mtd, off, sizeof(buf), &len, buf) ||
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len != sizeof(buf))
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@@ -198,75 +200,105 @@
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/* Try looking at TRX header for rootfs offset */
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if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
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- bcm947xx_parts[1].offset = off;
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if (le32_to_cpu(trx->offsets[1]) > off)
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off = le32_to_cpu(trx->offsets[1]);
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continue;
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}
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- /* romfs is at block zero too */
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- if (romfsb->word0 == ROMSB_WORD0 &&
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- romfsb->word1 == ROMSB_WORD1) {
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- printk(KERN_NOTICE
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- "%s: romfs filesystem found at block %d\n",
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- mtd->name, off / BLOCK_SIZE);
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- goto done;
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- }
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-
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- /* so is cramfs */
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+ /* need to find cramfs */
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if (cramfsb->magic == CRAMFS_MAGIC) {
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printk(KERN_NOTICE
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"%s: cramfs filesystem found at block %d\n",
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mtd->name, off / BLOCK_SIZE);
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- goto done;
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- }
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- /*
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- * Read block 1 to test for minix and ext2 superblock
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- */
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- if (MTD_READ(mtd, off + BLOCK_SIZE, sizeof(buf), &len, buf) ||
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- len != sizeof(buf))
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- continue;
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-
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- /* Try minix */
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- if (minixsb->s_magic == MINIX_SUPER_MAGIC ||
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- minixsb->s_magic == MINIX_SUPER_MAGIC2) {
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- printk(KERN_NOTICE
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- "%s: Minix filesystem found at block %d\n",
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- mtd->name, off / BLOCK_SIZE);
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+ part->size = cramfsb->size;
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goto done;
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}
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- /* Try ext2 */
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- if (ext2sb->s_magic == cpu_to_le16(EXT2_SUPER_MAGIC)) {
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+ /* or squashfs */
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+ if (squashfsb->s_magic == SQUASHFS_MAGIC) {
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printk(KERN_NOTICE
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- "%s: ext2 filesystem found at block %d\n",
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+ "%s: squashfs filesystem found at block %d\n",
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mtd->name, off / BLOCK_SIZE);
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+ part->size = squashfsb->bytes_used+2048;
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goto done;
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}
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- }
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+ }
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printk(KERN_NOTICE
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- "%s: Couldn't find valid ROM disk image\n",
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+ "%s: Couldn't find valid cramfs image\n",
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mtd->name);
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+ return -1;
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+
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+done:
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+ part->offset = off;
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+ return 0;
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+}
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+
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+
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+struct mtd_partition * __init
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+init_mtd_partitions(struct mtd_info *mtd, size_t size)
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+{
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+
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+ bcm947xx_parts[0].offset=0;
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+ bcm947xx_parts[0].size=256*1024;
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- done:
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/* Find and size nvram */
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bcm947xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
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bcm947xx_parts[3].size = size - bcm947xx_parts[3].offset;
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/* Find and size rootfs */
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- if (off < size) {
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- bcm947xx_parts[2].offset = off;
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- bcm947xx_parts[2].size = bcm947xx_parts[3].offset - bcm947xx_parts[2].offset;
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- }
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+ //if (off < size) {
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+ // bcm947xx_parts[2].offset = off;
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+ // bcm947xx_parts[2].size = bcm947xx_parts[3].offset - bcm947xx_parts[2].offset;
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+ //}
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+
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+ /* Find and size rootfs */
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+ find_root(mtd,size,&bcm947xx_parts[2]);
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+
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+
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/* Size linux (kernel and rootfs) */
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+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size;
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bcm947xx_parts[1].size = bcm947xx_parts[3].offset - bcm947xx_parts[1].offset;
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+
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+
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+ /* calculate leftover flash, and assign it to the jffs partition */
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+ size_t spot;
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+ size_t len;
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+ size_t mask;
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+ // get the offset to the end of the root_fs
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+ spot=bcm947xx_parts[2].offset+bcm947xx_parts[2].size;
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+ // round it up to an erase size boundary
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+ spot+=mtd->erasesize-1;
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+ // mask the number to the boundary
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+ mask=mtd->erasesize;
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+ mask=mask-1;
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+ mask=mask^0xffffffff;
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+ spot&=mask;
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+ // length = flashsize - start position - nvram size
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+ len=size-spot;
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+ len=len-bcm947xx_parts[3].size;
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+
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+
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+ bcm947xx_parts[4].offset = spot;
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+ bcm947xx_parts[4].size = len;
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+
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+
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+
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+
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/* Size pmon */
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bcm947xx_parts[0].size = bcm947xx_parts[1].offset - bcm947xx_parts[0].offset;
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+ //int x;
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+ //for(x=0; x<5; x++) {
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+ // printk(KERN_NOTICE
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+ // "Partition %d mask_flags %08x\n",
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+ // x,bcm947xx_parts[x].mask_flags);
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+ //}
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+
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+
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return bcm947xx_parts;
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}
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diff -Nurb src/linux/linux.orig/drivers/mtd/maps/bcm947xx-flash.c src/linux/linux/drivers/mtd/maps/bcm947xx-flash.c
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--- src/linux/linux.orig/drivers/mtd/maps/bcm947xx-flash.c 2003-11-08 04:35:52.000000000 -0500
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+++ src/linux/linux/drivers/mtd/maps/bcm947xx-flash.c 2004-05-25 21:12:24.000000000 -0400
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@@ -82,7 +82,21 @@
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void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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{
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+ //memcpy_fromio(to, map->map_priv_1 + from, len);
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+ if (len==1) {
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memcpy_fromio(to, map->map_priv_1 + from, len);
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+ } else {
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+ int i;
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+ u16 *dest = (u16 *) to;
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+ u16 *src = (u16 *) (map->map_priv_1 + from);
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+
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+ for (i = 0; i < (len / 2); i++) {
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+ dest[i] = src[i];
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+ }
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+
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+ if (len & 1)
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+ *((u8 *)dest+len-1) = src[i] & 0xff;
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+ }
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}
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void bcm947xx_map_write8(struct map_info *map, __u8 d, unsigned long adr)
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diff -Nurb src/linux/linux.orig/drivers/net/Makefile src/linux/linux/drivers/net/Makefile
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--- src/linux/linux.orig/drivers/net/Makefile 2004-02-12 21:35:15.000000000 -0500
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+++ src/linux/linux/drivers/net/Makefile 2004-05-25 21:12:24.000000000 -0400
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@@ -25,7 +25,7 @@
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list-multi := rcpci.o
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rcpci-objs := rcpci45.o rclanmtl.o
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-subdir-m += mac
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+# subdir-m += mac
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subdir-m += diag
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ifeq ($(CONFIG_HW_QOS),y)
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diff -Nurb src/linux/linux.orig/fs/Config.in src/linux/linux/fs/Config.in
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--- src/linux/linux.orig/fs/Config.in 2003-07-04 04:12:05.000000000 -0400
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+++ src/linux/linux/fs/Config.in 2004-05-25 21:13:03.000000000 -0400
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@@ -47,6 +47,7 @@
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int 'JFFS2 debugging verbosity (0 = quiet, 2 = noisy)' CONFIG_JFFS2_FS_DEBUG 0
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fi
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tristate 'Compressed ROM file system support' CONFIG_CRAMFS
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+tristate 'Squashed file system support' CONFIG_SQUASHFS
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bool 'Virtual memory file system support (former shm fs)' CONFIG_TMPFS
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define_bool CONFIG_RAMFS y
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diff -Nurb src/linux/linux.orig/fs/Makefile src/linux/linux/fs/Makefile
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--- src/linux/linux.orig/fs/Makefile 2003-07-04 04:12:05.000000000 -0400
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+++ src/linux/linux/fs/Makefile 2004-05-25 21:13:03.000000000 -0400
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@@ -68,6 +68,7 @@
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subdir-$(CONFIG_SUN_OPENPROMFS) += openpromfs
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subdir-$(CONFIG_BEFS_FS) += befs
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subdir-$(CONFIG_JFS_FS) += jfs
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+subdir-$(CONFIG_SQUASHFS) += squashfs
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obj-$(CONFIG_BINFMT_AOUT) += binfmt_aout.o
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diff -Nurb src/linux/linux.orig/fs/squashfs/Makefile src/linux/linux/fs/squashfs/Makefile
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--- src/linux/linux.orig/fs/squashfs/Makefile 1969-12-31 19:00:00.000000000 -0500
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+++ src/linux/linux/fs/squashfs/Makefile 2004-05-25 21:13:03.000000000 -0400
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@@ -0,0 +1,11 @@
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+#
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+# Makefile for the linux squashfs routines.
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+#
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+
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+O_TARGET := squashfs.o
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+
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+obj-y := inode.o
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+
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+obj-m := $(O_TARGET)
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+
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+include $(TOPDIR)/Rules.make
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diff -Nurb src/linux/linux.orig/fs/squashfs/inode.c src/linux/linux/fs/squashfs/inode.c
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--- src/linux/linux.orig/fs/squashfs/inode.c 1969-12-31 19:00:00.000000000 -0500
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+++ src/linux/linux/fs/squashfs/inode.c 2004-05-25 21:13:03.000000000 -0400
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@@ -0,0 +1,1515 @@
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+/*
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+ * Squashfs - a compressed read only filesystem for Linux
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+ *
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+ * Copyright (c) 2002, 2003, 2004 Phillip Lougher <plougher@users.sourceforge.net>
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * as published by the Free Software Foundation; either version 2,
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+ * or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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+ * Squashfs - a compressed read only filesystem for Linux
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+ *
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+ * inode.c
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+ */
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+
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+#define SQUASHFS_1_0_COMPATIBILITY
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+
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+#include <linux/types.h>
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+#include <linux/squashfs_fs.h>
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+#include <linux/module.h>
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+#include <linux/errno.h>
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+#include <linux/slab.h>
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+#include <linux/fs.h>
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+#include <linux/locks.h>
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+#include <linux/init.h>
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+#include <linux/dcache.h>
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+#include <asm/uaccess.h>
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+#include <linux/wait.h>
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+#include <asm/semaphore.h>
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+#include <linux/zlib.h>
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+#include <linux/blkdev.h>
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+#include <linux/vmalloc.h>
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+
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+#ifdef SQUASHFS_TRACE
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+#define TRACE(s, args...) printk(KERN_NOTICE "SQUASHFS: "s, ## args)
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+#else
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+#define TRACE(s, args...) {}
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+#endif
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+
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+#define ERROR(s, args...) printk(KERN_ERR "SQUASHFS error: "s, ## args)
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+
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+#define SERROR(s, args...) if(!silent) printk(KERN_ERR "SQUASHFS error: "s, ## args)
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+#define WARNING(s, args...) printk(KERN_WARNING "SQUASHFS: "s, ## args)
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+
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+static struct super_block *squashfs_read_super(struct super_block *, void *, int);
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+static void squashfs_put_super(struct super_block *);
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+static int squashfs_statfs(struct super_block *, struct statfs *);
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+static int squashfs_symlink_readpage(struct file *file, struct page *page);
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+static int squashfs_readpage(struct file *file, struct page *page);
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+static int squashfs_readpage4K(struct file *file, struct page *page);
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+static int squashfs_readdir(struct file *, void *, filldir_t);
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+static struct dentry *squashfs_lookup(struct inode *, struct dentry *);
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+static unsigned int read_data(struct super_block *s, char *buffer,
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+ unsigned int index, unsigned int length, int, unsigned int *next_index);
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+static int squashfs_get_cached_block(struct super_block *s, char *buffer,
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+ unsigned int block, unsigned int offset, int length,
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+ unsigned int *next_block, unsigned int *next_offset);
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+static struct inode *squashfs_iget(struct super_block *s, squashfs_inode inode);
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+static unsigned int read_blocklist(struct inode *inode, int index, int readahead_blks,
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+ char *block_list, char **block_p, unsigned int *bsize);
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+static void squashfs_put_super(struct super_block *s);
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+
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+#ifdef SQUASHFS_1_0_COMPATIBILITY
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+static int squashfs_readpage_lessthan4K(struct file *file, struct page *page);
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+static struct inode *squashfs_iget_1(struct super_block *s, squashfs_inode inode);
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+static unsigned int read_blocklist_1(struct inode *inode, int index, int readahead_blks,
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+ char *block_list, char **block_p, unsigned int *bsize);
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+#endif
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+
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+DECLARE_MUTEX(read_data_mutex);
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+
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+static z_stream stream;
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+
|
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+static DECLARE_FSTYPE_DEV(squashfs_fs_type, "squashfs", squashfs_read_super);
|
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+
|
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+static unsigned char squashfs_filetype_table[] = {
|
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+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
|
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+};
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+
|
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+static struct super_operations squashfs_ops = {
|
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+ statfs: squashfs_statfs,
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+ put_super: squashfs_put_super,
|
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+};
|
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+
|
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+static struct address_space_operations squashfs_symlink_aops = {
|
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+ readpage: squashfs_symlink_readpage
|
|
+};
|
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+
|
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+static struct address_space_operations squashfs_aops = {
|
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+ readpage: squashfs_readpage
|
|
+};
|
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+
|
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+static struct address_space_operations squashfs_aops_4K = {
|
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+ readpage: squashfs_readpage4K
|
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+};
|
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+
|
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+#ifdef SQUASHFS_1_0_COMPATIBILITY
|
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+static struct address_space_operations squashfs_aops_lessthan4K = {
|
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+ readpage: squashfs_readpage_lessthan4K
|
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+};
|
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+#endif
|
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+
|
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+static struct file_operations squashfs_dir_ops = {
|
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+ read: generic_read_dir,
|
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+ readdir: squashfs_readdir
|
|
+};
|
|
+
|
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+static struct inode_operations squashfs_dir_inode_ops = {
|
|
+ lookup: squashfs_lookup
|
|
+};
|
|
+
|
|
+
|
|
+static unsigned int read_data(struct super_block *s, char *buffer,
|
|
+ unsigned int index, unsigned int length, int datablock, unsigned int *next_index)
|
|
+{
|
|
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
|
|
+ struct buffer_head *bh[((SQUASHFS_FILE_MAX_SIZE - 1) >> msBlk->devblksize_log2) + 2];
|
|
+ unsigned int offset = index & ((1 << msBlk->devblksize_log2) - 1);
|
|
+ unsigned int cur_index = index >> msBlk->devblksize_log2;
|
|
+ int bytes, avail_bytes, b, k;
|
|
+ char *c_buffer;
|
|
+ unsigned int compressed;
|
|
+ unsigned int c_byte = length;
|
|
+
|
|
+ if(c_byte) {
|
|
+ bytes = msBlk->devblksize - offset;
|
|
+ if(datablock) {
|
|
+ c_buffer = (compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte)) ? msBlk->read_data : buffer;
|
|
+ c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte);
|
|
+ } else {
|
|
+ c_buffer = (compressed = SQUASHFS_COMPRESSED(c_byte)) ? msBlk->read_data : buffer;
|
|
+ c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte);
|
|
+ }
|
|
+
|
|
+ TRACE("Block @ 0x%x, %scompressed size %d\n", index, compressed ? "" : "un", (unsigned int) c_byte);
|
|
+
|
|
+ if(!(bh[0] = sb_getblk(s, cur_index)))
|
|
+ goto block_release;
|
|
+ for(b = 1; bytes < c_byte; b++) {
|
|
+ if(!(bh[b] = sb_getblk(s, ++cur_index)))
|
|
+ goto block_release;
|
|
+ bytes += msBlk->devblksize;
|
|
+ }
|
|
+ ll_rw_block(READ, b, bh);
|
|
+ } else {
|
|
+ unsigned short temp;
|
|
+ if(!(bh[0] = sb_bread(s, cur_index)))
|
|
+ goto read_failure;
|
|
+
|
|
+ if(msBlk->devblksize - offset == 1) {
|
|
+ if(msBlk->swap)
|
|
+ ((unsigned char *) &temp)[1] = *((unsigned char *) (bh[0]->b_data + offset));
|
|
+ else
|
|
+ ((unsigned char *) &temp)[0] = *((unsigned char *) (bh[0]->b_data + offset));
|
|
+ brelse(bh[0]);
|
|
+ if(!(bh[0] = sb_bread(s, ++cur_index)))
|
|
+ goto read_failure;
|
|
+ if(msBlk->swap)
|
|
+ ((unsigned char *) &temp)[0] = *((unsigned char *) bh[0]->b_data);
|
|
+ else
|
|
+ ((unsigned char *) &temp)[1] = *((unsigned char *) bh[0]->b_data);
|
|
+ c_byte = temp;
|
|
+ offset = 1;
|
|
+ }
|
|
+ else {
|
|
+ if(msBlk->swap) {
|
|
+ unsigned short temp;
|
|
+ ((unsigned char *) &temp)[1] = *((unsigned char *) (bh[0]->b_data + offset));
|
|
+ ((unsigned char *) &temp)[0] = *((unsigned char *) (bh[0]->b_data + offset + 1));
|
|
+ c_byte = temp;
|
|
+ } else
|
|
+ c_byte = *((unsigned short *) (bh[0]->b_data + offset));
|
|
+ offset += 2;
|
|
+ }
|
|
+ if(SQUASHFS_CHECK_DATA(msBlk->sBlk.flags)) {
|
|
+ if(offset == msBlk->devblksize) {
|
|
+ brelse(bh[0]);
|
|
+ if(!(bh[0] = sb_bread(s, ++cur_index)))
|
|
+ goto read_failure;
|
|
+ offset = 0;
|
|
+ }
|
|
+ if(*((unsigned char *) (bh[0]->b_data + offset)) != SQUASHFS_MARKER_BYTE) {
|
|
+ ERROR("Metadata block marker corrupt @ %x\n", index);
|
|
+ brelse(bh[0]);
|
|
+ return 0;
|
|
+ }
|
|
+ offset ++;
|
|
+ }
|
|
+
|
|
+ bytes = msBlk->devblksize - offset;
|
|
+ if(datablock) {
|
|
+ c_buffer = (compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte)) ? msBlk->read_data : buffer;
|
|
+ c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte);
|
|
+ } else {
|
|
+ c_buffer = (compressed = SQUASHFS_COMPRESSED(c_byte)) ? msBlk->read_data : buffer;
|
|
+ c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte);
|
|
+ }
|
|
+
|
|
+ TRACE("Block @ 0x%x, %scompressed size %d\n", index, compressed ? "" : "un", (unsigned int) c_byte);
|
|
+
|
|
+ for(b = 1; bytes < c_byte; b++) {
|
|
+ if(!(bh[b] = sb_getblk(s, ++cur_index)))
|
|
+ goto block_release;
|
|
+ bytes += msBlk->devblksize;
|
|
+ }
|
|
+ ll_rw_block(READ, b - 1, bh + 1);
|
|
+ }
|
|
+
|
|
+ if(compressed)
|
|
+ down(&read_data_mutex);
|
|
+
|
|
+ for(bytes = 0, k = 0; k < b; k++) {
|
|
+ avail_bytes = (c_byte - bytes) > (msBlk->devblksize - offset) ? msBlk->devblksize - offset : c_byte - bytes;
|
|
+ wait_on_buffer(bh[k]);
|
|
+ memcpy(c_buffer + bytes, bh[k]->b_data + offset, avail_bytes);
|
|
+ bytes += avail_bytes;
|
|
+ offset = 0;
|
|
+ brelse(bh[k]);
|
|
+ }
|
|
+
|
|
+ /*
|
|
+ * uncompress block
|
|
+ */
|
|
+ if(compressed) {
|
|
+ int zlib_err;
|
|
+
|
|
+ stream.next_in = c_buffer;
|
|
+ stream.avail_in = c_byte;
|
|
+ stream.next_out = buffer;
|
|
+ stream.avail_out = msBlk->read_size;
|
|
+ if(((zlib_err = zlib_inflateInit(&stream)) != Z_OK) ||
|
|
+ ((zlib_err = zlib_inflate(&stream, Z_FINISH)) != Z_STREAM_END) ||
|
|
+ ((zlib_err = zlib_inflateEnd(&stream)) != Z_OK)) {
|
|
+ ERROR("zlib_fs returned unexpected result 0x%x\n", zlib_err);
|
|
+ bytes = 0;
|
|
+ } else
|
|
+ bytes = stream.total_out;
|
|
+ up(&read_data_mutex);
|
|
+ }
|
|
+
|
|
+ if(next_index)
|
|
+ *next_index = index + c_byte + (length ? 0 : (SQUASHFS_CHECK_DATA(msBlk->sBlk.flags) ? 3 : 2));
|
|
+
|
|
+ return bytes;
|
|
+
|
|
+block_release:
|
|
+ while(--b >= 0) brelse(bh[b]);
|
|
+
|
|
+read_failure:
|
|
+ ERROR("sb_bread failed reading block 0x%x\n", cur_index);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_get_cached_block(struct super_block *s, char *buffer,
|
|
+ unsigned int block, unsigned int offset, int length,
|
|
+ unsigned int *next_block, unsigned int *next_offset)
|
|
+{
|
|
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
|
|
+ int n, i, bytes, return_length = length;
|
|
+ unsigned int next_index;
|
|
+
|
|
+ TRACE("Entered squashfs_get_cached_block [%x:%x]\n", block, offset);
|
|
+
|
|
+ for(;;) {
|
|
+ for(i = 0; i < SQUASHFS_CACHED_BLKS; i++)
|
|
+ if(msBlk->block_cache[i].block == block)
|
|
+ break;
|
|
+
|
|
+ down(&msBlk->block_cache_mutex);
|
|
+ if(i == SQUASHFS_CACHED_BLKS) {
|
|
+ /* read inode header block */
|
|
+ for(i = msBlk->next_cache, n = SQUASHFS_CACHED_BLKS; n ; n --, i = (i + 1) % SQUASHFS_CACHED_BLKS)
|
|
+ if(msBlk->block_cache[i].block != SQUASHFS_USED_BLK)
|
|
+ break;
|
|
+ if(n == 0) {
|
|
+ up(&msBlk->block_cache_mutex);
|
|
+ sleep_on(&msBlk->waitq);
|
|
+ continue;
|
|
+ }
|
|
+ msBlk->next_cache = (i + 1) % SQUASHFS_CACHED_BLKS;
|
|
+
|
|
+ if(msBlk->block_cache[i].block == SQUASHFS_INVALID_BLK) {
|
|
+ if(!(msBlk->block_cache[i].data = (unsigned char *)
|
|
+ kmalloc(SQUASHFS_METADATA_SIZE, GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate cache block\n");
|
|
+ up(&msBlk->block_cache_mutex);
|
|
+ return 0;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ msBlk->block_cache[i].block = SQUASHFS_USED_BLK;
|
|
+ up(&msBlk->block_cache_mutex);
|
|
+ if(!(msBlk->block_cache[i].length = read_data(s, msBlk->block_cache[i].data, block, 0, 0,
|
|
+ &next_index))) {
|
|
+ ERROR("Unable to read cache block [%x:%x]\n", block, offset);
|
|
+ return 0;
|
|
+ }
|
|
+ down(&msBlk->block_cache_mutex);
|
|
+ wake_up(&msBlk->waitq);
|
|
+ msBlk->block_cache[i].block = block;
|
|
+ msBlk->block_cache[i].next_index = next_index;
|
|
+ TRACE("Read cache block [%x:%x]\n", block, offset);
|
|
+ }
|
|
+
|
|
+ if(msBlk->block_cache[i].block != block) {
|
|
+ up(&msBlk->block_cache_mutex);
|
|
+ continue;
|
|
+ }
|
|
+
|
|
+ if((bytes = msBlk->block_cache[i].length - offset) >= length) {
|
|
+ if(buffer)
|
|
+ memcpy(buffer, msBlk->block_cache[i].data + offset, length);
|
|
+ if(msBlk->block_cache[i].length - offset == length) {
|
|
+ *next_block = msBlk->block_cache[i].next_index;
|
|
+ *next_offset = 0;
|
|
+ } else {
|
|
+ *next_block = block;
|
|
+ *next_offset = offset + length;
|
|
+ }
|
|
+
|
|
+ up(&msBlk->block_cache_mutex);
|
|
+ return return_length;
|
|
+ } else {
|
|
+ if(buffer) {
|
|
+ memcpy(buffer, msBlk->block_cache[i].data + offset, bytes);
|
|
+ buffer += bytes;
|
|
+ }
|
|
+ block = msBlk->block_cache[i].next_index;
|
|
+ up(&msBlk->block_cache_mutex);
|
|
+ length -= bytes;
|
|
+ offset = 0;
|
|
+ }
|
|
+ }
|
|
+}
|
|
+
|
|
+
|
|
+static int get_fragment_location(struct super_block *s, unsigned int fragment, unsigned int *fragment_start_block, unsigned int *fragment_size)
|
|
+{
|
|
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
|
|
+ unsigned int start_block = msBlk->fragment_index[SQUASHFS_FRAGMENT_INDEX(fragment)];
|
|
+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET(fragment);
|
|
+ squashfs_fragment_entry fragment_entry;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_fragment_entry sfragment_entry;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sfragment_entry, start_block, offset,
|
|
+ sizeof(sfragment_entry), &start_block, &offset))
|
|
+ return 0;
|
|
+ SQUASHFS_SWAP_FRAGMENT_ENTRY(&fragment_entry, &sfragment_entry);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &fragment_entry, start_block, offset,
|
|
+ sizeof(fragment_entry), &start_block, &offset))
|
|
+ return 0;
|
|
+
|
|
+ *fragment_start_block = fragment_entry.start_block;
|
|
+ *fragment_size = fragment_entry.size;
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+
|
|
+void release_cached_fragment(squashfs_sb_info *msBlk, struct squashfs_fragment_cache *fragment)
|
|
+{
|
|
+ down(&msBlk->fragment_mutex);
|
|
+ fragment->locked --;
|
|
+ wake_up(&msBlk->fragment_wait_queue);
|
|
+ up(&msBlk->fragment_mutex);
|
|
+}
|
|
+
|
|
+
|
|
+struct squashfs_fragment_cache *get_cached_fragment(struct super_block *s, unsigned int start_block, int length)
|
|
+{
|
|
+ int i, n;
|
|
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
|
|
+
|
|
+ for(;;) {
|
|
+ down(&msBlk->fragment_mutex);
|
|
+ for(i = 0; i < SQUASHFS_CACHED_FRAGMENTS && msBlk->fragment[i].block != start_block; i++);
|
|
+ if(i == SQUASHFS_CACHED_FRAGMENTS) {
|
|
+ for(i = msBlk->next_fragment, n = SQUASHFS_CACHED_FRAGMENTS;
|
|
+ n && msBlk->fragment[i].locked; n--, i = (i + 1) % SQUASHFS_CACHED_FRAGMENTS);
|
|
+
|
|
+ if(n == 0) {
|
|
+ up(&msBlk->fragment_mutex);
|
|
+ sleep_on(&msBlk->fragment_wait_queue);
|
|
+ continue;
|
|
+ }
|
|
+ msBlk->next_fragment = (msBlk->next_fragment + 1) % SQUASHFS_CACHED_FRAGMENTS;
|
|
+
|
|
+ if(msBlk->fragment[i].data == NULL)
|
|
+ if(!(msBlk->fragment[i].data = (unsigned char *)
|
|
+ kmalloc(SQUASHFS_FILE_MAX_SIZE, GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate fragment cache block\n");
|
|
+ up(&msBlk->fragment_mutex);
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ msBlk->fragment[i].block = SQUASHFS_INVALID_BLK;
|
|
+ msBlk->fragment[i].locked = 1;
|
|
+ up(&msBlk->fragment_mutex);
|
|
+ if(!(msBlk->fragment[i].length = read_data(s, msBlk->fragment[i].data, start_block, length,
|
|
+ 1, NULL))) {
|
|
+ ERROR("Unable to read fragment cache block [%x]\n", start_block);
|
|
+ msBlk->fragment[i].locked = 0;
|
|
+ return NULL;
|
|
+ }
|
|
+ msBlk->fragment[i].block = start_block;
|
|
+ TRACE("New fragment %d, start block %d, locked %d\n", i, msBlk->fragment[i].block, msBlk->fragment[i].locked);
|
|
+ return &msBlk->fragment[i];
|
|
+ }
|
|
+
|
|
+ msBlk->fragment[i].locked ++;
|
|
+ up(&msBlk->fragment_mutex);
|
|
+
|
|
+ TRACE("Got fragment %d, start block %d, locked %d\n", i, msBlk->fragment[i].block, msBlk->fragment[i].locked);
|
|
+ return &msBlk->fragment[i];
|
|
+ }
|
|
+}
|
|
+
|
|
+
|
|
+#ifdef SQUASHFS_1_0_COMPATIBILITY
|
|
+static struct inode *squashfs_iget_1(struct super_block *s, squashfs_inode inode)
|
|
+{
|
|
+ struct inode *i = new_inode(s);
|
|
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
|
|
+ squashfs_super_block *sBlk = &msBlk->sBlk;
|
|
+ unsigned int block = SQUASHFS_INODE_BLK(inode) + sBlk->inode_table_start;
|
|
+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
|
|
+ unsigned int next_block, next_offset;
|
|
+ squashfs_base_inode_header_1 inodeb;
|
|
+
|
|
+ TRACE("Entered squashfs_iget_1\n");
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_base_inode_header_1 sinodeb;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodeb, block, offset,
|
|
+ sizeof(sinodeb), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER_1(&inodeb, &sinodeb, sizeof(sinodeb));
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodeb, block, offset,
|
|
+ sizeof(inodeb), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_nlink = 1;
|
|
+
|
|
+ i->i_mtime = sBlk->mkfs_time;
|
|
+ i->i_atime = sBlk->mkfs_time;
|
|
+ i->i_ctime = sBlk->mkfs_time;
|
|
+
|
|
+ if(inodeb.inode_type != SQUASHFS_IPC_TYPE)
|
|
+ i->i_uid = msBlk->uid[((inodeb.inode_type - 1) / SQUASHFS_TYPES) * 16 + inodeb.uid];
|
|
+ i->i_ino = SQUASHFS_MK_VFS_INODE(block - sBlk->inode_table_start, offset);
|
|
+
|
|
+ i->i_mode = inodeb.mode;
|
|
+
|
|
+ switch(inodeb.inode_type == SQUASHFS_IPC_TYPE ? SQUASHFS_IPC_TYPE : (inodeb.inode_type - 1) % SQUASHFS_TYPES + 1) {
|
|
+ case SQUASHFS_FILE_TYPE: {
|
|
+ squashfs_reg_inode_header_1 inodep;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_reg_inode_header_1 sinodep;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_REG_INODE_HEADER_1(&inodep, &sinodep);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = inodep.file_size;
|
|
+ i->i_fop = &generic_ro_fops;
|
|
+ if(sBlk->block_size > 4096)
|
|
+ i->i_data.a_ops = &squashfs_aops;
|
|
+ else if(sBlk->block_size == 4096)
|
|
+ i->i_data.a_ops = &squashfs_aops_4K;
|
|
+ else
|
|
+ i->i_data.a_ops = &squashfs_aops_lessthan4K;
|
|
+ i->i_mode |= S_IFREG;
|
|
+ i->i_mtime = inodep.mtime;
|
|
+ i->i_atime = inodep.mtime;
|
|
+ i->i_ctime = inodep.mtime;
|
|
+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
|
|
+ i->i_blksize = PAGE_CACHE_SIZE;
|
|
+ i->u.squashfs_i.fragment_start_block = SQUASHFS_INVALID_BLK;
|
|
+ i->u.squashfs_i.fragment_offset = 0;
|
|
+ i->u.squashfs_i.start_block = inodep.start_block;
|
|
+ i->u.squashfs_i.block_list_start = next_block;
|
|
+ i->u.squashfs_i.offset = next_offset;
|
|
+ TRACE("File inode %x:%x, start_block %x, block_list_start %x, offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset, inodep.start_block, next_block, next_offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_DIR_TYPE: {
|
|
+ squashfs_dir_inode_header_1 inodep;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_dir_inode_header_1 sinodep;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_DIR_INODE_HEADER_1(&inodep, &sinodep);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = inodep.file_size;
|
|
+ i->i_op = &squashfs_dir_inode_ops;
|
|
+ i->i_fop = &squashfs_dir_ops;
|
|
+ i->i_mode |= S_IFDIR;
|
|
+ i->i_mtime = inodep.mtime;
|
|
+ i->i_atime = inodep.mtime;
|
|
+ i->i_ctime = inodep.mtime;
|
|
+ i->u.squashfs_i.start_block = inodep.start_block;
|
|
+ i->u.squashfs_i.offset = inodep.offset;
|
|
+ TRACE("Directory inode %x:%x, start_block %x, offset %x\n", SQUASHFS_INODE_BLK(inode), offset,
|
|
+ inodep.start_block, inodep.offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_SYMLINK_TYPE: {
|
|
+ squashfs_symlink_inode_header_1 inodep;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_symlink_inode_header_1 sinodep;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(&inodep, &sinodep);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = inodep.symlink_size;
|
|
+ i->i_op = &page_symlink_inode_operations;
|
|
+ i->i_data.a_ops = &squashfs_symlink_aops;
|
|
+ i->i_mode |= S_IFLNK;
|
|
+ i->u.squashfs_i.start_block = next_block;
|
|
+ i->u.squashfs_i.offset = next_offset;
|
|
+ TRACE("Symbolic link inode %x:%x, start_block %x, offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset, next_block, next_offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_BLKDEV_TYPE:
|
|
+ case SQUASHFS_CHRDEV_TYPE: {
|
|
+ squashfs_dev_inode_header_1 inodep;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_dev_inode_header_1 sinodep;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_DEV_INODE_HEADER_1(&inodep, &sinodep);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = 0;
|
|
+ i->i_mode |= (inodeb.inode_type == SQUASHFS_CHRDEV_TYPE) ? S_IFCHR : S_IFBLK;
|
|
+ init_special_inode(i, i->i_mode, inodep.rdev);
|
|
+ TRACE("Device inode %x:%x, rdev %x\n", SQUASHFS_INODE_BLK(inode), offset, inodep.rdev);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_IPC_TYPE: {
|
|
+ squashfs_ipc_inode_header_1 inodep;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_ipc_inode_header_1 sinodep;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_IPC_INODE_HEADER_1(&inodep, &sinodep);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = 0;
|
|
+ i->i_mode |= (inodep.type == SQUASHFS_FIFO_TYPE) ? S_IFIFO : S_IFSOCK;
|
|
+ i->i_uid = msBlk->uid[inodep.offset * 16 + inodeb.uid];
|
|
+ init_special_inode(i, i->i_mode, 0);
|
|
+ break;
|
|
+ }
|
|
+ default:
|
|
+ ERROR("Unknown inode type %d in squashfs_iget!\n", inodeb.inode_type);
|
|
+ goto failed_read1;
|
|
+ }
|
|
+
|
|
+ if(inodeb.guid == SQUASHFS_GUIDS)
|
|
+ i->i_gid = i->i_uid;
|
|
+ else
|
|
+ i->i_gid = msBlk->guid[inodeb.guid];
|
|
+
|
|
+ return i;
|
|
+
|
|
+failed_read:
|
|
+ ERROR("Unable to read inode [%x:%x]\n", block, offset);
|
|
+
|
|
+failed_read1:
|
|
+ return NULL;
|
|
+}
|
|
+#endif
|
|
+
|
|
+
|
|
+static struct inode *squashfs_iget(struct super_block *s, squashfs_inode inode)
|
|
+{
|
|
+ struct inode *i = new_inode(s);
|
|
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
|
|
+ squashfs_super_block *sBlk = &msBlk->sBlk;
|
|
+ unsigned int block = SQUASHFS_INODE_BLK(inode) + sBlk->inode_table_start;
|
|
+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
|
|
+ unsigned int next_block, next_offset;
|
|
+ squashfs_base_inode_header inodeb;
|
|
+
|
|
+ TRACE("Entered squashfs_iget\n");
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_base_inode_header sinodeb;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodeb, block, offset,
|
|
+ sizeof(sinodeb), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER(&inodeb, &sinodeb, sizeof(sinodeb));
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodeb, block, offset,
|
|
+ sizeof(inodeb), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_nlink = 1;
|
|
+
|
|
+ i->i_mtime = sBlk->mkfs_time;
|
|
+ i->i_atime = sBlk->mkfs_time;
|
|
+ i->i_ctime = sBlk->mkfs_time;
|
|
+
|
|
+ if(inodeb.inode_type != SQUASHFS_IPC_TYPE)
|
|
+ i->i_uid = msBlk->uid[((inodeb.inode_type - 1) / SQUASHFS_TYPES) * 16 + inodeb.uid];
|
|
+ i->i_ino = SQUASHFS_MK_VFS_INODE(block - sBlk->inode_table_start, offset);
|
|
+
|
|
+ i->i_mode = inodeb.mode;
|
|
+
|
|
+ switch(inodeb.inode_type) {
|
|
+ case SQUASHFS_FILE_TYPE: {
|
|
+ squashfs_reg_inode_header inodep;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_reg_inode_header sinodep;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_REG_INODE_HEADER(&inodep, &sinodep);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->u.squashfs_i.fragment_start_block = SQUASHFS_INVALID_BLK;
|
|
+ if(inodep.fragment != SQUASHFS_INVALID_BLK && !get_fragment_location(s, inodep.fragment,
|
|
+ &i->u.squashfs_i.fragment_start_block, &i->u.squashfs_i.fragment_size))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->u.squashfs_i.fragment_offset = inodep.offset;
|
|
+ i->i_size = inodep.file_size;
|
|
+ i->i_fop = &generic_ro_fops;
|
|
+ if(sBlk->block_size > 4096)
|
|
+ i->i_data.a_ops = &squashfs_aops;
|
|
+ else
|
|
+ i->i_data.a_ops = &squashfs_aops_4K;
|
|
+ i->i_mode |= S_IFREG;
|
|
+ i->i_mtime = inodep.mtime;
|
|
+ i->i_atime = inodep.mtime;
|
|
+ i->i_ctime = inodep.mtime;
|
|
+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
|
|
+ i->i_blksize = PAGE_CACHE_SIZE;
|
|
+ i->u.squashfs_i.start_block = inodep.start_block;
|
|
+ i->u.squashfs_i.block_list_start = next_block;
|
|
+ i->u.squashfs_i.offset = next_offset;
|
|
+ TRACE("File inode %x:%x, start_block %x, block_list_start %x, offset %x fragment_index %x fragment_offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset, inodep.start_block, next_block, next_offset, inodep.fragment, inodep.offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_DIR_TYPE: {
|
|
+ squashfs_dir_inode_header inodep;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_dir_inode_header sinodep;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_DIR_INODE_HEADER(&inodep, &sinodep);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = inodep.file_size;
|
|
+ i->i_op = &squashfs_dir_inode_ops;
|
|
+ i->i_fop = &squashfs_dir_ops;
|
|
+ i->i_mode |= S_IFDIR;
|
|
+ i->i_mtime = inodep.mtime;
|
|
+ i->i_atime = inodep.mtime;
|
|
+ i->i_ctime = inodep.mtime;
|
|
+ i->u.squashfs_i.start_block = inodep.start_block;
|
|
+ i->u.squashfs_i.offset = inodep.offset;
|
|
+ TRACE("Directory inode %x:%x, start_block %x, offset %x\n", SQUASHFS_INODE_BLK(inode), offset,
|
|
+ inodep.start_block, inodep.offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_SYMLINK_TYPE: {
|
|
+ squashfs_symlink_inode_header inodep;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_symlink_inode_header sinodep;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER(&inodep, &sinodep);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = inodep.symlink_size;
|
|
+ i->i_op = &page_symlink_inode_operations;
|
|
+ i->i_data.a_ops = &squashfs_symlink_aops;
|
|
+ i->i_mode |= S_IFLNK;
|
|
+ i->u.squashfs_i.start_block = next_block;
|
|
+ i->u.squashfs_i.offset = next_offset;
|
|
+ TRACE("Symbolic link inode %x:%x, start_block %x, offset %x\n",
|
|
+ SQUASHFS_INODE_BLK(inode), offset, next_block, next_offset);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_BLKDEV_TYPE:
|
|
+ case SQUASHFS_CHRDEV_TYPE: {
|
|
+ squashfs_dev_inode_header inodep;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_dev_inode_header sinodep;
|
|
+
|
|
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ SQUASHFS_SWAP_DEV_INODE_HEADER(&inodep, &sinodep);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
|
|
+ &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+
|
|
+ i->i_size = 0;
|
|
+ i->i_mode |= (inodeb.inode_type == SQUASHFS_CHRDEV_TYPE) ? S_IFCHR : S_IFBLK;
|
|
+ init_special_inode(i, i->i_mode, inodep.rdev);
|
|
+ TRACE("Device inode %x:%x, rdev %x\n", SQUASHFS_INODE_BLK(inode), offset, inodep.rdev);
|
|
+ break;
|
|
+ }
|
|
+ case SQUASHFS_FIFO_TYPE:
|
|
+ case SQUASHFS_SOCKET_TYPE: {
|
|
+ i->i_size = 0;
|
|
+ i->i_mode |= (inodeb.inode_type == SQUASHFS_FIFO_TYPE) ? S_IFIFO : S_IFSOCK;
|
|
+ init_special_inode(i, i->i_mode, 0);
|
|
+ break;
|
|
+ }
|
|
+ default:
|
|
+ ERROR("Unknown inode type %d in squashfs_iget!\n", inodeb.inode_type);
|
|
+ goto failed_read1;
|
|
+ }
|
|
+
|
|
+ if(inodeb.guid == SQUASHFS_GUIDS)
|
|
+ i->i_gid = i->i_uid;
|
|
+ else
|
|
+ i->i_gid = msBlk->guid[inodeb.guid];
|
|
+
|
|
+ return i;
|
|
+
|
|
+failed_read:
|
|
+ ERROR("Unable to read inode [%x:%x]\n", block, offset);
|
|
+
|
|
+failed_read1:
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
+
|
|
+static struct super_block *squashfs_read_super(struct super_block *s,
|
|
+ void *data, int silent)
|
|
+{
|
|
+ kdev_t dev = s->s_dev;
|
|
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
|
|
+ squashfs_super_block *sBlk = &msBlk->sBlk;
|
|
+ int i;
|
|
+
|
|
+ TRACE("Entered squashfs_read_superblock\n");
|
|
+
|
|
+ msBlk->devblksize = get_hardsect_size(dev);
|
|
+ if(msBlk->devblksize < BLOCK_SIZE)
|
|
+ msBlk->devblksize = BLOCK_SIZE;
|
|
+ msBlk->devblksize_log2 = ffz(~msBlk->devblksize);
|
|
+ set_blocksize(dev, msBlk->devblksize);
|
|
+ s->s_blocksize = msBlk->devblksize;
|
|
+ s->s_blocksize_bits = msBlk->devblksize_log2;
|
|
+
|
|
+ init_MUTEX(&msBlk->read_page_mutex);
|
|
+ init_MUTEX(&msBlk->block_cache_mutex);
|
|
+ init_MUTEX(&msBlk->fragment_mutex);
|
|
+
|
|
+ init_waitqueue_head(&msBlk->waitq);
|
|
+ init_waitqueue_head(&msBlk->fragment_wait_queue);
|
|
+
|
|
+ if(!read_data(s, (char *) sBlk, SQUASHFS_START, sizeof(squashfs_super_block) | SQUASHFS_COMPRESSED_BIT, 0, NULL)) {
|
|
+ SERROR("unable to read superblock\n");
|
|
+ goto failed_mount;
|
|
+ }
|
|
+
|
|
+ /* Check it is a SQUASHFS superblock */
|
|
+ msBlk->swap = 0;
|
|
+ if((s->s_magic = sBlk->s_magic) != SQUASHFS_MAGIC) {
|
|
+ if(sBlk->s_magic == SQUASHFS_MAGIC_SWAP) {
|
|
+ squashfs_super_block sblk;
|
|
+ WARNING("Mounting a different endian SQUASHFS filesystem on %s\n", bdevname(dev));
|
|
+ SQUASHFS_SWAP_SUPER_BLOCK(&sblk, sBlk);
|
|
+ memcpy(sBlk, &sblk, sizeof(squashfs_super_block));
|
|
+ msBlk->swap = 1;
|
|
+ } else {
|
|
+ SERROR("Can't find a SQUASHFS superblock on %s\n", bdevname(dev));
|
|
+ goto failed_mount;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /* Check the MAJOR & MINOR versions */
|
|
+#ifdef SQUASHFS_1_0_COMPATIBILITY
|
|
+ if((sBlk->s_major != 1) && (sBlk->s_major != 2 || sBlk->s_minor > SQUASHFS_MINOR)) {
|
|
+ SERROR("Major/Minor mismatch, filesystem is (%d:%d), I support (1 : x) or (2 : <= %d)\n",
|
|
+ sBlk->s_major, sBlk->s_minor, SQUASHFS_MINOR);
|
|
+ goto failed_mount;
|
|
+ }
|
|
+ if(sBlk->s_major == 1)
|
|
+ sBlk->block_size = sBlk->block_size_1;
|
|
+#else
|
|
+ if(sBlk->s_major != SQUASHFS_MAJOR || sBlk->s_minor > SQUASHFS_MINOR) {
|
|
+ SERROR("Major/Minor mismatch, filesystem is (%d:%d), I support (%d: <= %d)\n",
|
|
+ sBlk->s_major, sBlk->s_minor, SQUASHFS_MAJOR, SQUASHFS_MINOR);
|
|
+ goto failed_mount;
|
|
+ }
|
|
+#endif
|
|
+
|
|
+ TRACE("Found valid superblock on %s\n", bdevname(dev));
|
|
+ TRACE("Inodes are %scompressed\n", SQUASHFS_UNCOMPRESSED_INODES(sBlk->flags) ? "un" : "");
|
|
+ TRACE("Data is %scompressed\n", SQUASHFS_UNCOMPRESSED_DATA(sBlk->flags) ? "un" : "");
|
|
+ TRACE("Check data is %s present in the filesystem\n", SQUASHFS_CHECK_DATA(sBlk->flags) ? "" : "not");
|
|
+ TRACE("Filesystem size %d bytes\n", sBlk->bytes_used);
|
|
+ TRACE("Block size %d\n", sBlk->block_size);
|
|
+ TRACE("Number of inodes %d\n", sBlk->inodes);
|
|
+ if(sBlk->s_major > 1)
|
|
+ TRACE("Number of fragments %d\n", sBlk->fragments);
|
|
+ TRACE("Number of uids %d\n", sBlk->no_uids);
|
|
+ TRACE("Number of gids %d\n", sBlk->no_guids);
|
|
+ TRACE("sBlk->inode_table_start %x\n", sBlk->inode_table_start);
|
|
+ TRACE("sBlk->directory_table_start %x\n", sBlk->directory_table_start);
|
|
+ if(sBlk->s_major > 1)
|
|
+ TRACE("sBlk->fragment_table_start %x\n", sBlk->fragment_table_start);
|
|
+ TRACE("sBlk->uid_start %x\n", sBlk->uid_start);
|
|
+
|
|
+ s->s_flags |= MS_RDONLY;
|
|
+ s->s_op = &squashfs_ops;
|
|
+
|
|
+ /* Init inode_table block pointer array */
|
|
+ if(!(msBlk->block_cache = (squashfs_cache *) kmalloc(sizeof(squashfs_cache) * SQUASHFS_CACHED_BLKS, GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate block cache\n");
|
|
+ goto failed_mount;
|
|
+ }
|
|
+
|
|
+ for(i = 0; i < SQUASHFS_CACHED_BLKS; i++)
|
|
+ msBlk->block_cache[i].block = SQUASHFS_INVALID_BLK;
|
|
+
|
|
+ msBlk->next_cache = 0;
|
|
+
|
|
+ /* Allocate read_data block */
|
|
+ msBlk->read_size = (sBlk->block_size < SQUASHFS_METADATA_SIZE) ? SQUASHFS_METADATA_SIZE : sBlk->block_size;
|
|
+ if(!(msBlk->read_data = (char *) kmalloc(msBlk->read_size, GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate read_data block\n");
|
|
+ goto failed_mount1;
|
|
+ }
|
|
+
|
|
+ /* Allocate read_page block */
|
|
+ if(sBlk->block_size > PAGE_CACHE_SIZE &&
|
|
+ !(msBlk->read_page = (char *) kmalloc(sBlk->block_size, GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate read_page block\n");
|
|
+ goto failed_mount2;
|
|
+ }
|
|
+
|
|
+ /* Allocate uid and gid tables */
|
|
+ if(!(msBlk->uid = (squashfs_uid *) kmalloc((sBlk->no_uids +
|
|
+ sBlk->no_guids) * sizeof(squashfs_uid), GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate uid/gid table\n");
|
|
+ goto failed_mount3;
|
|
+ }
|
|
+ msBlk->guid = msBlk->uid + sBlk->no_uids;
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_uid suid[sBlk->no_uids + sBlk->no_guids];
|
|
+
|
|
+ if(!read_data(s, (char *) &suid, sBlk->uid_start, ((sBlk->no_uids + sBlk->no_guids) *
|
|
+ sizeof(squashfs_uid)) | SQUASHFS_COMPRESSED_BIT, 0, NULL)) {
|
|
+ SERROR("unable to read uid/gid table\n");
|
|
+ goto failed_mount4;
|
|
+ }
|
|
+ SQUASHFS_SWAP_DATA(msBlk->uid, suid, (sBlk->no_uids + sBlk->no_guids), (sizeof(squashfs_uid) * 8));
|
|
+ } else
|
|
+ if(!read_data(s, (char *) msBlk->uid, sBlk->uid_start, ((sBlk->no_uids + sBlk->no_guids) *
|
|
+ sizeof(squashfs_uid)) | SQUASHFS_COMPRESSED_BIT, 0, NULL)) {
|
|
+ SERROR("unable to read uid/gid table\n");
|
|
+ goto failed_mount4;
|
|
+ }
|
|
+
|
|
+
|
|
+#ifdef SQUASHFS_1_0_COMPATIBILITY
|
|
+ if(sBlk->s_major == 1) {
|
|
+ msBlk->iget = squashfs_iget_1;
|
|
+ msBlk->read_blocklist = read_blocklist_1;
|
|
+ msBlk->fragment = (struct squashfs_fragment_cache *) msBlk->fragment_index = NULL;
|
|
+ goto allocate_root;
|
|
+ }
|
|
+#endif
|
|
+ msBlk->iget = squashfs_iget;
|
|
+ msBlk->read_blocklist = read_blocklist;
|
|
+
|
|
+ if(!(msBlk->fragment = (struct squashfs_fragment_cache *) kmalloc(sizeof(struct squashfs_fragment_cache) * SQUASHFS_CACHED_FRAGMENTS, GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate fragment block cache\n");
|
|
+ goto failed_mount4;
|
|
+ }
|
|
+
|
|
+ for(i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++) {
|
|
+ msBlk->fragment[i].locked = 0;
|
|
+ msBlk->fragment[i].block = SQUASHFS_INVALID_BLK;
|
|
+ msBlk->fragment[i].data = NULL;
|
|
+ }
|
|
+
|
|
+ msBlk->next_fragment = 0;
|
|
+
|
|
+ /* Allocate fragment index table */
|
|
+ if(!(msBlk->fragment_index = (squashfs_fragment_index *) kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES(sBlk->fragments), GFP_KERNEL))) {
|
|
+ ERROR("Failed to allocate uid/gid table\n");
|
|
+ goto failed_mount5;
|
|
+ }
|
|
+
|
|
+ if(SQUASHFS_FRAGMENT_INDEX_BYTES(sBlk->fragments) &&
|
|
+ !read_data(s, (char *) msBlk->fragment_index, sBlk->fragment_table_start,
|
|
+ SQUASHFS_FRAGMENT_INDEX_BYTES(sBlk->fragments) | SQUASHFS_COMPRESSED_BIT, 0, NULL)) {
|
|
+ SERROR("unable to read fragment index table\n");
|
|
+ goto failed_mount6;
|
|
+ }
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ int i;
|
|
+ squashfs_fragment_index fragment;
|
|
+
|
|
+ for(i = 0; i < SQUASHFS_FRAGMENT_INDEXES(sBlk->fragments); i++) {
|
|
+ SQUASHFS_SWAP_FRAGMENT_INDEXES((&fragment), &msBlk->fragment_index[i], 1);
|
|
+ msBlk->fragment_index[i] = fragment;
|
|
+ }
|
|
+ }
|
|
+
|
|
+#ifdef SQUASHFS_1_0_COMPATIBILITY
|
|
+allocate_root:
|
|
+#endif
|
|
+ if(!(s->s_root = d_alloc_root((msBlk->iget)(s, sBlk->root_inode)))) {
|
|
+ ERROR("Root inode create failed\n");
|
|
+ goto failed_mount5;
|
|
+ }
|
|
+
|
|
+ TRACE("Leaving squashfs_read_super\n");
|
|
+ return s;
|
|
+
|
|
+failed_mount6:
|
|
+ kfree(msBlk->fragment_index);
|
|
+failed_mount5:
|
|
+ kfree(msBlk->fragment);
|
|
+failed_mount4:
|
|
+ kfree(msBlk->uid);
|
|
+failed_mount3:
|
|
+ kfree(msBlk->read_page);
|
|
+failed_mount2:
|
|
+ kfree(msBlk->read_data);
|
|
+failed_mount1:
|
|
+ kfree(msBlk->block_cache);
|
|
+failed_mount:
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_statfs(struct super_block *s, struct statfs *buf)
|
|
+{
|
|
+ squashfs_super_block *sBlk = &s->u.squashfs_sb.sBlk;
|
|
+
|
|
+ TRACE("Entered squashfs_statfs\n");
|
|
+ buf->f_type = SQUASHFS_MAGIC;
|
|
+ buf->f_bsize = sBlk->block_size;
|
|
+ buf->f_blocks = ((sBlk->bytes_used - 1) >> sBlk->block_log) + 1;
|
|
+ buf->f_bfree = buf->f_bavail = 0;
|
|
+ buf->f_files = sBlk->inodes;
|
|
+ buf->f_ffree = 0;
|
|
+ buf->f_namelen = SQUASHFS_NAME_LEN;
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_symlink_readpage(struct file *file, struct page *page)
|
|
+{
|
|
+ struct inode *inode = page->mapping->host;
|
|
+ int index = page->index << PAGE_CACHE_SHIFT, length, bytes;
|
|
+ int block = inode->u.squashfs_i.start_block;
|
|
+ int offset = inode->u.squashfs_i.offset;
|
|
+ void *pageaddr = kmap(page);
|
|
+
|
|
+ TRACE("Entered squashfs_symlink_readpage, page index %x, start block %x, offset %x\n",
|
|
+ (unsigned int) page->index, inode->u.squashfs_i.start_block, inode->u.squashfs_i.offset);
|
|
+
|
|
+ for(length = 0; length < index; length += bytes) {
|
|
+ if(!(bytes = squashfs_get_cached_block(inode->i_sb, NULL, block, offset,
|
|
+ PAGE_CACHE_SIZE, &block, &offset))) {
|
|
+ ERROR("Unable to read symbolic link [%x:%x]\n", block, offset);
|
|
+ goto skip_read;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if(length != index) {
|
|
+ ERROR("(squashfs_symlink_readpage) length != index\n");
|
|
+ bytes = 0;
|
|
+ goto skip_read;
|
|
+ }
|
|
+
|
|
+ bytes = (inode->i_size - length) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : inode->i_size - length;
|
|
+ if(!(bytes = squashfs_get_cached_block(inode->i_sb, pageaddr, block, offset, bytes, &block, &offset)))
|
|
+ ERROR("Unable to read symbolic link [%x:%x]\n", block, offset);
|
|
+
|
|
+skip_read:
|
|
+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
|
|
+ kunmap(page);
|
|
+ flush_dcache_page(page);
|
|
+ SetPageUptodate(page);
|
|
+ UnlockPage(page);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+#define SIZE 256
|
|
+
|
|
+#ifdef SQUASHFS_1_0_COMPATIBILITY
|
|
+static unsigned int read_blocklist_1(struct inode *inode, int index, int readahead_blks,
|
|
+ char *block_list, char **block_p, unsigned int *bsize)
|
|
+{
|
|
+ squashfs_sb_info *msBlk = &inode->i_sb->u.squashfs_sb;
|
|
+ unsigned short *block_listp;
|
|
+ int i = 0;
|
|
+ int block_ptr = inode->u.squashfs_i.block_list_start;
|
|
+ int offset = inode->u.squashfs_i.offset;
|
|
+ int block = inode->u.squashfs_i.start_block;
|
|
+
|
|
+ for(;;) {
|
|
+ int blocks = (index + readahead_blks - i);
|
|
+ if(blocks > (SIZE >> 1)) {
|
|
+ if((index - i) <= (SIZE >> 1))
|
|
+ blocks = index - i;
|
|
+ else
|
|
+ blocks = SIZE >> 1;
|
|
+ }
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ unsigned char sblock_list[SIZE];
|
|
+ if(!squashfs_get_cached_block(inode->i_sb, (char *) sblock_list, block_ptr, offset, blocks << 1, &block_ptr, &offset)) {
|
|
+ ERROR("Unable to read block list [%d:%x]\n", block_ptr, offset);
|
|
+ return 0;
|
|
+ }
|
|
+ SQUASHFS_SWAP_SHORTS(((unsigned short *)block_list), ((unsigned short *)sblock_list), blocks);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(inode->i_sb, (char *) block_list, block_ptr, offset, blocks << 1, &block_ptr, &offset)) {
|
|
+ ERROR("Unable to read block list [%d:%x]\n", block_ptr, offset);
|
|
+ return 0;
|
|
+ }
|
|
+ for(block_listp = (unsigned short *) block_list; i < index && blocks; i ++, block_listp ++, blocks --)
|
|
+ block += SQUASHFS_COMPRESSED_SIZE(*block_listp);
|
|
+ if(blocks >= readahead_blks)
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ if(bsize)
|
|
+ *bsize = SQUASHFS_COMPRESSED_SIZE(*block_listp) | (!SQUASHFS_COMPRESSED(*block_listp) ? SQUASHFS_COMPRESSED_BIT_BLOCK : 0);
|
|
+ else
|
|
+ (unsigned short *) *block_p = block_listp;
|
|
+ return block;
|
|
+}
|
|
+#endif
|
|
+
|
|
+
|
|
+
|
|
+static unsigned int read_blocklist(struct inode *inode, int index, int readahead_blks,
|
|
+ char *block_list, char **block_p, unsigned int *bsize)
|
|
+{
|
|
+ squashfs_sb_info *msBlk = &inode->i_sb->u.squashfs_sb;
|
|
+ unsigned int *block_listp;
|
|
+ int i = 0;
|
|
+ int block_ptr = inode->u.squashfs_i.block_list_start;
|
|
+ int offset = inode->u.squashfs_i.offset;
|
|
+ int block = inode->u.squashfs_i.start_block;
|
|
+
|
|
+ for(;;) {
|
|
+ int blocks = (index + readahead_blks - i);
|
|
+ if(blocks > (SIZE >> 2)) {
|
|
+ if((index - i) <= (SIZE >> 2))
|
|
+ blocks = index - i;
|
|
+ else
|
|
+ blocks = SIZE >> 2;
|
|
+ }
|
|
+
|
|
+ if(msBlk->swap) {
|
|
+ unsigned char sblock_list[SIZE];
|
|
+ if(!squashfs_get_cached_block(inode->i_sb, (char *) sblock_list, block_ptr, offset, blocks << 2, &block_ptr, &offset)) {
|
|
+ ERROR("Unable to read block list [%d:%x]\n", block_ptr, offset);
|
|
+ return 0;
|
|
+ }
|
|
+ SQUASHFS_SWAP_INTS(((unsigned int *)block_list), ((unsigned int *)sblock_list), blocks);
|
|
+ } else
|
|
+ if(!squashfs_get_cached_block(inode->i_sb, (char *) block_list, block_ptr, offset, blocks << 2, &block_ptr, &offset)) {
|
|
+ ERROR("Unable to read block list [%d:%x]\n", block_ptr, offset);
|
|
+ return 0;
|
|
+ }
|
|
+ for(block_listp = (unsigned int *) block_list; i < index && blocks; i ++, block_listp ++, blocks --)
|
|
+ block += SQUASHFS_COMPRESSED_SIZE_BLOCK(*block_listp);
|
|
+ if(blocks >= readahead_blks)
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ *bsize = *block_listp;
|
|
+ return block;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_readpage(struct file *file, struct page *page)
|
|
+{
|
|
+ struct inode *inode = page->mapping->host;
|
|
+ squashfs_sb_info *msBlk = &inode->i_sb->u.squashfs_sb;
|
|
+ squashfs_super_block *sBlk = &msBlk->sBlk;
|
|
+ unsigned char block_list[SIZE];
|
|
+ unsigned int bsize, block, i = 0, bytes = 0, byte_offset = 0;
|
|
+ int index = page->index >> (sBlk->block_log - PAGE_CACHE_SHIFT);
|
|
+ void *pageaddr = kmap(page);
|
|
+ struct squashfs_fragment_cache *fragment;
|
|
+ char *data_ptr = msBlk->read_page;
|
|
+
|
|
+ int mask = (1 << (sBlk->block_log - PAGE_CACHE_SHIFT)) - 1;
|
|
+ int start_index = page->index & ~mask;
|
|
+ int end_index = start_index | mask;
|
|
+
|
|
+ TRACE("Entered squashfs_readpage, page index %x, start block %x\n", (unsigned int) page->index,
|
|
+ inode->u.squashfs_i.start_block);
|
|
+
|
|
+ if(inode->u.squashfs_i.fragment_start_block == SQUASHFS_INVALID_BLK || index < (inode->i_size >> sBlk->block_log)) {
|
|
+ if((block = (msBlk->read_blocklist)(inode, index, 1, block_list, NULL, &bsize)) == 0)
|
|
+ goto skip_read;
|
|
+
|
|
+ down(&msBlk->read_page_mutex);
|
|
+ if(!(bytes = read_data(inode->i_sb, msBlk->read_page, block, bsize, 1, NULL))) {
|
|
+ ERROR("Unable to read page, block %x, size %x\n", block, bsize);
|
|
+ up(&msBlk->read_page_mutex);
|
|
+ goto skip_read;
|
|
+ }
|
|
+ } else {
|
|
+ if((fragment = get_cached_fragment(inode->i_sb, inode->u.squashfs_i.fragment_start_block, inode->u.squashfs_i.fragment_size)) == NULL) {
|
|
+ ERROR("Unable to read page, block %x, size %x\n", inode->u.squashfs_i.fragment_start_block, (int) inode->u.squashfs_i.fragment_size);
|
|
+ goto skip_read;
|
|
+ }
|
|
+ bytes = inode->u.squashfs_i.fragment_offset + (inode->i_size & (sBlk->block_size - 1));
|
|
+ byte_offset = inode->u.squashfs_i.fragment_offset;
|
|
+ data_ptr = fragment->data;
|
|
+ }
|
|
+
|
|
+ for(i = start_index; i <= end_index && byte_offset < bytes; i++, byte_offset += PAGE_CACHE_SIZE) {
|
|
+ struct page *push_page;
|
|
+ int available_bytes = (bytes - byte_offset) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : bytes - byte_offset;
|
|
+
|
|
+ TRACE("bytes %d, i %d, byte_offset %d, available_bytes %d\n", bytes, i, byte_offset, available_bytes);
|
|
+
|
|
+ if(i == page->index) {
|
|
+ memcpy(pageaddr, data_ptr + byte_offset, available_bytes);
|
|
+ memset(pageaddr + available_bytes, 0, PAGE_CACHE_SIZE - available_bytes);
|
|
+ kunmap(page);
|
|
+ flush_dcache_page(page);
|
|
+ SetPageUptodate(page);
|
|
+ UnlockPage(page);
|
|
+ } else if((push_page = grab_cache_page_nowait(page->mapping, i))) {
|
|
+ void *pageaddr = kmap(push_page);
|
|
+ memcpy(pageaddr, data_ptr + byte_offset, available_bytes);
|
|
+ memset(pageaddr + available_bytes, 0, PAGE_CACHE_SIZE - available_bytes);
|
|
+ kunmap(push_page);
|
|
+ flush_dcache_page(push_page);
|
|
+ SetPageUptodate(push_page);
|
|
+ UnlockPage(push_page);
|
|
+ page_cache_release(push_page);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if(inode->u.squashfs_i.fragment_start_block == SQUASHFS_INVALID_BLK || index < (inode->i_size >> sBlk->block_log))
|
|
+ up(&msBlk->read_page_mutex);
|
|
+ else
|
|
+ release_cached_fragment(msBlk, fragment);
|
|
+
|
|
+ return 0;
|
|
+
|
|
+skip_read:
|
|
+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
|
|
+ kunmap(page);
|
|
+ flush_dcache_page(page);
|
|
+ SetPageUptodate(page);
|
|
+ UnlockPage(page);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static int squashfs_readpage4K(struct file *file, struct page *page)
|
|
+{
|
|
+ struct inode *inode = page->mapping->host;
|
|
+ squashfs_sb_info *msBlk = &inode->i_sb->u.squashfs_sb;
|
|
+ squashfs_super_block *sBlk = &msBlk->sBlk;
|
|
+ unsigned char block_list[SIZE];
|
|
+ unsigned int bsize, block, bytes = 0;
|
|
+ void *pageaddr = kmap(page);
|
|
+
|
|
+ TRACE("Entered squashfs_readpage4K, page index %x, start block %x\n", (unsigned int) page->index,
|
|
+ inode->u.squashfs_i.start_block);
|
|
+
|
|
+ if(page->index < (inode->i_size >> sBlk->block_log)) {
|
|
+ block = (msBlk->read_blocklist)(inode, page->index, 1, block_list, NULL, &bsize);
|
|
+
|
|
+ if(!(bytes = read_data(inode->i_sb, pageaddr, block, bsize, 1, NULL)))
|
|
+ ERROR("Unable to read page, block %x, size %x\n", block, bsize);
|
|
+ } else {
|
|
+ struct squashfs_fragment_cache *fragment;
|
|
+
|
|
+ if((fragment = get_cached_fragment(inode->i_sb, inode->u.squashfs_i.fragment_start_block, inode->u.squashfs_i.fragment_size)) == NULL)
|
|
+ ERROR("Unable to read page, block %x, size %x\n", inode->u.squashfs_i.fragment_start_block, (int) inode->u.squashfs_i.fragment_size);
|
|
+ else {
|
|
+ bytes = inode->i_size & (sBlk->block_size - 1);
|
|
+ memcpy(pageaddr, fragment->data + inode->u.squashfs_i.fragment_offset, bytes);
|
|
+ release_cached_fragment(msBlk, fragment);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
|
|
+ kunmap(page);
|
|
+ flush_dcache_page(page);
|
|
+ SetPageUptodate(page);
|
|
+ UnlockPage(page);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+#ifdef SQUASHFS_1_0_COMPATIBILITY
|
|
+static int squashfs_readpage_lessthan4K(struct file *file, struct page *page)
|
|
+{
|
|
+ struct inode *inode = page->mapping->host;
|
|
+ squashfs_sb_info *msBlk = &inode->i_sb->u.squashfs_sb;
|
|
+ squashfs_super_block *sBlk = &msBlk->sBlk;
|
|
+ unsigned char block_list[SIZE];
|
|
+ unsigned short *block_listp, block, bytes = 0;
|
|
+ int index = page->index << (PAGE_CACHE_SHIFT - sBlk->block_log);
|
|
+ int file_blocks = ((inode->i_size - 1) >> sBlk->block_log) + 1;
|
|
+ int readahead_blks = 1 << (PAGE_CACHE_SHIFT - sBlk->block_log);
|
|
+ void *pageaddr = kmap(page);
|
|
+
|
|
+ int i_end = index + (1 << (PAGE_CACHE_SHIFT - sBlk->block_log));
|
|
+ int byte;
|
|
+
|
|
+ TRACE("Entered squashfs_readpage_lessthan4K, page index %x, start block %x\n", (unsigned int) page->index,
|
|
+ inode->u.squashfs_i.start_block);
|
|
+
|
|
+ block = read_blocklist_1(inode, index, readahead_blks, block_list, (char **) &block_listp, NULL);
|
|
+
|
|
+ if(i_end > file_blocks)
|
|
+ i_end = file_blocks;
|
|
+
|
|
+ while(index < i_end) {
|
|
+ if(!(byte = read_data(inode->i_sb, pageaddr, block, *block_listp, 0, NULL))) {
|
|
+ ERROR("Unable to read page, block %x, size %x\n", block, *block_listp);
|
|
+ goto skip_read;
|
|
+ }
|
|
+ block += SQUASHFS_COMPRESSED_SIZE(*block_listp);
|
|
+ pageaddr += byte;
|
|
+ bytes += byte;
|
|
+ index ++;
|
|
+ block_listp ++;
|
|
+ }
|
|
+
|
|
+skip_read:
|
|
+ memset(pageaddr, 0, PAGE_CACHE_SIZE - bytes);
|
|
+ kunmap(page);
|
|
+ flush_dcache_page(page);
|
|
+ SetPageUptodate(page);
|
|
+ UnlockPage(page);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+#endif
|
|
+
|
|
+
|
|
+static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir)
|
|
+{
|
|
+ struct inode *i = file->f_dentry->d_inode;
|
|
+ squashfs_sb_info *msBlk = &i->i_sb->u.squashfs_sb;
|
|
+ squashfs_super_block *sBlk = &msBlk->sBlk;
|
|
+ int next_block = i->u.squashfs_i.start_block + sBlk->directory_table_start, next_offset =
|
|
+ i->u.squashfs_i.offset, length = 0, dirs_read = 0, dir_count;
|
|
+ squashfs_dir_header dirh;
|
|
+ char buffer[sizeof(squashfs_dir_entry) + SQUASHFS_NAME_LEN + 1];
|
|
+ squashfs_dir_entry *dire = (squashfs_dir_entry *) buffer;
|
|
+
|
|
+ TRACE("Entered squashfs_readdir [%x:%x]\n", next_block, next_offset);
|
|
+
|
|
+ while(length < i->i_size) {
|
|
+ /* read directory header */
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_dir_header sdirh;
|
|
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &sdirh, next_block,
|
|
+ next_offset, sizeof(sdirh), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ length += sizeof(sdirh);
|
|
+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
|
|
+ } else {
|
|
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &dirh, next_block,
|
|
+ next_offset, sizeof(dirh), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ length += sizeof(dirh);
|
|
+ }
|
|
+
|
|
+ dir_count = dirh.count + 1;
|
|
+ while(dir_count--) {
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_dir_entry sdire;
|
|
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &sdire, next_block,
|
|
+ next_offset, sizeof(sdire), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ length += sizeof(sdire);
|
|
+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
|
|
+ } else {
|
|
+ if(!squashfs_get_cached_block(i->i_sb, (char *) dire, next_block,
|
|
+ next_offset, sizeof(*dire), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ length += sizeof(*dire);
|
|
+ }
|
|
+
|
|
+ if(!squashfs_get_cached_block(i->i_sb, dire->name, next_block,
|
|
+ next_offset, dire->size + 1, &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ length += dire->size + 1;
|
|
+
|
|
+ if(file->f_pos >= length)
|
|
+ continue;
|
|
+
|
|
+ dire->name[dire->size + 1] = '\0';
|
|
+
|
|
+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d)\n", (unsigned int) dirent,
|
|
+ dire->name, dire->size + 1, (int) file->f_pos,
|
|
+ dirh.start_block, dire->offset, squashfs_filetype_table[dire->type]);
|
|
+
|
|
+ if(filldir(dirent, dire->name, dire->size + 1, file->f_pos, SQUASHFS_MK_VFS_INODE(dirh.start_block,
|
|
+ dire->offset), squashfs_filetype_table[dire->type]) < 0) {
|
|
+ TRACE("Filldir returned less than 0\n");
|
|
+ return dirs_read;
|
|
+ }
|
|
+
|
|
+ file->f_pos = length;
|
|
+ dirs_read ++;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return dirs_read;
|
|
+
|
|
+failed_read:
|
|
+ ERROR("Unable to read directory block [%x:%x]\n", next_block, next_offset);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
+static struct dentry *squashfs_lookup(struct inode *i, struct dentry *dentry)
|
|
+{
|
|
+ const char *name =dentry->d_name.name;
|
|
+ int len = dentry->d_name.len;
|
|
+ struct inode *inode = NULL;
|
|
+ squashfs_sb_info *msBlk = &i->i_sb->u.squashfs_sb;
|
|
+ squashfs_super_block *sBlk = &msBlk->sBlk;
|
|
+ int next_block = i->u.squashfs_i.start_block + sBlk->directory_table_start, next_offset =
|
|
+ i->u.squashfs_i.offset, length = 0, dir_count;
|
|
+ squashfs_dir_header dirh;
|
|
+ char buffer[sizeof(squashfs_dir_entry) + SQUASHFS_NAME_LEN];
|
|
+ squashfs_dir_entry *dire = (squashfs_dir_entry *) buffer;
|
|
+
|
|
+ TRACE("Entered squashfs_lookup [%x:%x]\n", next_block, next_offset);
|
|
+
|
|
+ while(length < i->i_size) {
|
|
+ /* read directory header */
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_dir_header sdirh;
|
|
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &sdirh, next_block, next_offset,
|
|
+ sizeof(sdirh), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ length += sizeof(sdirh);
|
|
+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
|
|
+ } else {
|
|
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &dirh, next_block, next_offset,
|
|
+ sizeof(dirh), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ length += sizeof(dirh);
|
|
+ }
|
|
+
|
|
+ dir_count = dirh.count + 1;
|
|
+ while(dir_count--) {
|
|
+ if(msBlk->swap) {
|
|
+ squashfs_dir_entry sdire;
|
|
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &sdire,
|
|
+ next_block,next_offset, sizeof(sdire), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ length += sizeof(sdire);
|
|
+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
|
|
+ } else {
|
|
+ if(!squashfs_get_cached_block(i->i_sb, (char *) dire,
|
|
+ next_block,next_offset, sizeof(*dire), &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ length += sizeof(*dire);
|
|
+ }
|
|
+
|
|
+ if(!squashfs_get_cached_block(i->i_sb, dire->name,
|
|
+ next_block, next_offset, dire->size + 1, &next_block, &next_offset))
|
|
+ goto failed_read;
|
|
+ length += dire->size + 1;
|
|
+
|
|
+ if((len == dire->size + 1) && !strncmp(name, dire->name, len)) {
|
|
+ squashfs_inode ino = SQUASHFS_MKINODE(dirh.start_block, dire->offset);
|
|
+
|
|
+ TRACE("calling squashfs_iget for directory entry %s, inode %x:%x\n",
|
|
+ name, dirh.start_block, dire->offset);
|
|
+
|
|
+ inode = (msBlk->iget)(i->i_sb, ino);
|
|
+
|
|
+ goto exit_loop;
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+exit_loop:
|
|
+ d_add(dentry, inode);
|
|
+ return ERR_PTR(0);
|
|
+
|
|
+failed_read:
|
|
+ ERROR("Unable to read directory block [%x:%x]\n", next_block, next_offset);
|
|
+ goto exit_loop;
|
|
+}
|
|
+
|
|
+
|
|
+static void squashfs_put_super(struct super_block *s)
|
|
+{
|
|
+ if(s->u.squashfs_sb.block_cache) kfree(s->u.squashfs_sb.block_cache);
|
|
+ if(s->u.squashfs_sb.read_data) kfree(s->u.squashfs_sb.read_data);
|
|
+ if(s->u.squashfs_sb.read_page) kfree(s->u.squashfs_sb.read_page);
|
|
+ if(s->u.squashfs_sb.uid) kfree(s->u.squashfs_sb.uid);
|
|
+ s->u.squashfs_sb.block_cache = (void *) s->u.squashfs_sb.uid =
|
|
+ s->u.squashfs_sb.read_data = s->u.squashfs_sb.read_page = NULL;
|
|
+}
|
|
+
|
|
+
|
|
+static int __init init_squashfs_fs(void)
|
|
+{
|
|
+
|
|
+ if(!(stream.workspace = (char *) vmalloc(zlib_inflate_workspacesize()))) {
|
|
+ ERROR("Failed to allocate zlib workspace\n");
|
|
+ return -ENOMEM;
|
|
+ }
|
|
+ return register_filesystem(&squashfs_fs_type);
|
|
+}
|
|
+
|
|
+
|
|
+static void __exit exit_squashfs_fs(void)
|
|
+{
|
|
+ vfree(stream.workspace);
|
|
+ unregister_filesystem(&squashfs_fs_type);
|
|
+}
|
|
+
|
|
+
|
|
+EXPORT_NO_SYMBOLS;
|
|
+
|
|
+module_init(init_squashfs_fs);
|
|
+module_exit(exit_squashfs_fs);
|
|
+MODULE_DESCRIPTION("squashfs, a compressed read-only filesystem");
|
|
+MODULE_AUTHOR("Phillip Lougher <plougher@users.sourceforge.net>");
|
|
+MODULE_LICENSE("GPL");
|
|
diff -Nurb src/linux/linux.orig/include/linux/fs.h src/linux/linux/include/linux/fs.h
|
|
--- src/linux/linux.orig/include/linux/fs.h 2003-07-04 04:12:25.000000000 -0400
|
|
+++ src/linux/linux/include/linux/fs.h 2004-05-25 21:13:03.000000000 -0400
|
|
@@ -313,6 +313,7 @@
|
|
#include <linux/usbdev_fs_i.h>
|
|
#include <linux/jffs2_fs_i.h>
|
|
#include <linux/cramfs_fs_sb.h>
|
|
+#include <linux/squashfs_fs_i.h>
|
|
|
|
/*
|
|
* Attribute flags. These should be or-ed together to figure out what
|
|
@@ -503,6 +504,7 @@
|
|
struct socket socket_i;
|
|
struct usbdev_inode_info usbdev_i;
|
|
struct jffs2_inode_info jffs2_i;
|
|
+ struct squashfs_inode_info squashfs_i;
|
|
void *generic_ip;
|
|
} u;
|
|
};
|
|
@@ -697,6 +699,7 @@
|
|
#include <linux/usbdev_fs_sb.h>
|
|
#include <linux/cramfs_fs_sb.h>
|
|
#include <linux/jffs2_fs_sb.h>
|
|
+#include <linux/squashfs_fs_sb.h>
|
|
|
|
extern struct list_head super_blocks;
|
|
extern spinlock_t sb_lock;
|
|
@@ -755,6 +758,7 @@
|
|
struct usbdev_sb_info usbdevfs_sb;
|
|
struct jffs2_sb_info jffs2_sb;
|
|
struct cramfs_sb_info cramfs_sb;
|
|
+ struct squashfs_sb_info squashfs_sb;
|
|
void *generic_sbp;
|
|
} u;
|
|
/*
|
|
diff -Nurb src/linux/linux.orig/include/linux/squashfs_fs.h src/linux/linux/include/linux/squashfs_fs.h
|
|
--- src/linux/linux.orig/include/linux/squashfs_fs.h 1969-12-31 19:00:00.000000000 -0500
|
|
+++ src/linux/linux/include/linux/squashfs_fs.h 2004-05-25 21:13:03.000000000 -0400
|
|
@@ -0,0 +1,474 @@
|
|
+#ifndef SQUASHFS_FS
|
|
+#define SQUASHFS_FS
|
|
+/*
|
|
+ * Squashfs
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004 Phillip Lougher <plougher@users.sourceforge.net>
|
|
+ *
|
|
+ * 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,
|
|
+ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * squashfs_fs.h
|
|
+ */
|
|
+
|
|
+#define SQUASHFS_MAJOR 2
|
|
+#define SQUASHFS_MINOR 0
|
|
+#define SQUASHFS_MAGIC 0x73717368
|
|
+#define SQUASHFS_MAGIC_SWAP 0x68737173
|
|
+#define SQUASHFS_START 0
|
|
+
|
|
+/* size of metadata (inode and directory) blocks */
|
|
+#define SQUASHFS_METADATA_SIZE 8192
|
|
+#define SQUASHFS_METADATA_LOG 13
|
|
+
|
|
+/* default size of data blocks */
|
|
+#define SQUASHFS_FILE_SIZE 65536
|
|
+#define SQUASHFS_FILE_LOG 16
|
|
+
|
|
+#define SQUASHFS_FILE_MAX_SIZE 65536
|
|
+
|
|
+/* Max number of uids and gids */
|
|
+#define SQUASHFS_UIDS 256
|
|
+#define SQUASHFS_GUIDS 255
|
|
+
|
|
+/* Max length of filename (not 255) */
|
|
+#define SQUASHFS_NAME_LEN 256
|
|
+
|
|
+#define SQUASHFS_INVALID ((long long) 0xffffffffffff)
|
|
+#define SQUASHFS_INVALID_BLK ((long long) 0xffffffff)
|
|
+#define SQUASHFS_USED_BLK ((long long) 0xfffffffe)
|
|
+
|
|
+/* Filesystem flags */
|
|
+#define SQUASHFS_NOI 0
|
|
+#define SQUASHFS_NOD 1
|
|
+#define SQUASHFS_CHECK 2
|
|
+#define SQUASHFS_NOF 3
|
|
+#define SQUASHFS_NO_FRAG 4
|
|
+#define SQUASHFS_ALWAYS_FRAG 5
|
|
+#define SQUASHFS_DUPLICATE 6
|
|
+#define SQUASHFS_BIT(flag, bit) ((flag >> bit) & 1)
|
|
+#define SQUASHFS_UNCOMPRESSED_INODES(flags) SQUASHFS_BIT(flags, SQUASHFS_NOI)
|
|
+#define SQUASHFS_UNCOMPRESSED_DATA(flags) SQUASHFS_BIT(flags, SQUASHFS_NOD)
|
|
+#define SQUASHFS_UNCOMPRESSED_FRAGMENTS(flags) SQUASHFS_BIT(flags, SQUASHFS_NOF)
|
|
+#define SQUASHFS_NO_FRAGMENTS(flags) SQUASHFS_BIT(flags, SQUASHFS_NO_FRAG)
|
|
+#define SQUASHFS_ALWAYS_FRAGMENTS(flags) SQUASHFS_BIT(flags, SQUASHFS_ALWAYS_FRAG)
|
|
+#define SQUASHFS_DUPLICATES(flags) SQUASHFS_BIT(flags, SQUASHFS_DUPLICATE)
|
|
+#define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, SQUASHFS_CHECK)
|
|
+#define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, duplicate_checking) (noi | (nod << 1) | (check_data << 2) | (nof << 3) | (no_frag << 4) | (always_frag << 5) | (duplicate_checking << 6))
|
|
+
|
|
+/* Max number of types and file types */
|
|
+#define SQUASHFS_DIR_TYPE 1
|
|
+#define SQUASHFS_FILE_TYPE 2
|
|
+#define SQUASHFS_SYMLINK_TYPE 3
|
|
+#define SQUASHFS_BLKDEV_TYPE 4
|
|
+#define SQUASHFS_CHRDEV_TYPE 5
|
|
+#define SQUASHFS_FIFO_TYPE 6
|
|
+#define SQUASHFS_SOCKET_TYPE 7
|
|
+
|
|
+/* 1.0 filesystem type definitions */
|
|
+#define SQUASHFS_TYPES 5
|
|
+#define SQUASHFS_IPC_TYPE 0
|
|
+
|
|
+/* Flag whether block is compressed or uncompressed, bit is set if block is uncompressed */
|
|
+#define SQUASHFS_COMPRESSED_BIT (1 << 15)
|
|
+#define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \
|
|
+ (B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT)
|
|
+
|
|
+#define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT))
|
|
+
|
|
+#define SQUASHFS_COMPRESSED_BIT_BLOCK (1 << 24)
|
|
+#define SQUASHFS_COMPRESSED_SIZE_BLOCK(B) (((B) & ~SQUASHFS_COMPRESSED_BIT_BLOCK) ? \
|
|
+ (B) & ~SQUASHFS_COMPRESSED_BIT_BLOCK : SQUASHFS_COMPRESSED_BIT_BLOCK)
|
|
+
|
|
+#define SQUASHFS_COMPRESSED_BLOCK(B) (!((B) & SQUASHFS_COMPRESSED_BIT_BLOCK))
|
|
+
|
|
+/*
|
|
+ * Inode number ops. Inodes consist of a compressed block number, and an uncompressed
|
|
+ * offset within that block
|
|
+ */
|
|
+#define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16))
|
|
+#define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff))
|
|
+#define SQUASHFS_MKINODE(A, B) ((squashfs_inode)(((squashfs_inode) (A) << 16)\
|
|
+ + (B)))
|
|
+
|
|
+/* Compute 32 bit VFS inode number from squashfs inode number */
|
|
+#define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + ((b) >> 2) + 1))
|
|
+
|
|
+/* Translate between VFS mode and squashfs mode */
|
|
+#define SQUASHFS_MODE(a) ((a) & 0xfff)
|
|
+
|
|
+/* fragment and fragment table defines */
|
|
+typedef unsigned int squashfs_fragment_index;
|
|
+#define SQUASHFS_FRAGMENT_BYTES(A) (A * sizeof(squashfs_fragment_entry))
|
|
+#define SQUASHFS_FRAGMENT_INDEX(A) (SQUASHFS_FRAGMENT_BYTES(A) / SQUASHFS_METADATA_SIZE)
|
|
+#define SQUASHFS_FRAGMENT_INDEX_OFFSET(A) (SQUASHFS_FRAGMENT_BYTES(A) % SQUASHFS_METADATA_SIZE)
|
|
+#define SQUASHFS_FRAGMENT_INDEXES(A) ((SQUASHFS_FRAGMENT_BYTES(A) + SQUASHFS_METADATA_SIZE - 1) / SQUASHFS_METADATA_SIZE)
|
|
+#define SQUASHFS_FRAGMENT_INDEX_BYTES(A) (SQUASHFS_FRAGMENT_INDEXES(A) * sizeof(squashfs_fragment_index))
|
|
+#define SQUASHFS_CACHED_FRAGMENTS 3
|
|
+
|
|
+/* cached data constants for filesystem */
|
|
+#define SQUASHFS_CACHED_BLKS 8
|
|
+
|
|
+#define SQUASHFS_MAX_FILE_SIZE_LOG 32
|
|
+#define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << (SQUASHFS_MAX_FILE_SIZE_LOG - 1))
|
|
+
|
|
+#define SQUASHFS_MARKER_BYTE 0xff
|
|
+
|
|
+/*
|
|
+ * definitions for structures on disk
|
|
+ */
|
|
+
|
|
+typedef unsigned int squashfs_block;
|
|
+typedef long long squashfs_inode;
|
|
+
|
|
+typedef unsigned int squashfs_uid;
|
|
+
|
|
+typedef struct squashfs_super_block {
|
|
+ unsigned int s_magic;
|
|
+ unsigned int inodes;
|
|
+ unsigned int bytes_used;
|
|
+ unsigned int uid_start;
|
|
+ unsigned int guid_start;
|
|
+ unsigned int inode_table_start;
|
|
+ unsigned int directory_table_start;
|
|
+ unsigned int s_major:16;
|
|
+ unsigned int s_minor:16;
|
|
+ unsigned int block_size_1:16;
|
|
+ unsigned int block_log:16;
|
|
+ unsigned int flags:8;
|
|
+ unsigned int no_uids:8;
|
|
+ unsigned int no_guids:8;
|
|
+ time_t mkfs_time /* time of filesystem creation */;
|
|
+ squashfs_inode root_inode;
|
|
+ unsigned int block_size;
|
|
+ unsigned int fragments;
|
|
+ unsigned int fragment_table_start;
|
|
+} __attribute__ ((packed)) squashfs_super_block;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+} __attribute__ ((packed)) squashfs_base_inode_header;
|
|
+
|
|
+typedef squashfs_base_inode_header squashfs_ipc_inode_header;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+ unsigned short rdev;
|
|
+} __attribute__ ((packed)) squashfs_dev_inode_header;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+ unsigned short symlink_size;
|
|
+ char symlink[0];
|
|
+} __attribute__ ((packed)) squashfs_symlink_inode_header;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+ time_t mtime;
|
|
+ squashfs_block start_block;
|
|
+ unsigned int fragment;
|
|
+ unsigned int offset;
|
|
+ unsigned int file_size:SQUASHFS_MAX_FILE_SIZE_LOG;
|
|
+ unsigned short block_list[0];
|
|
+} __attribute__ ((packed)) squashfs_reg_inode_header;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:8; /* index into uid table */
|
|
+ unsigned int guid:8; /* index into guid table */
|
|
+ unsigned int file_size:19;
|
|
+ unsigned int offset:13;
|
|
+ time_t mtime;
|
|
+ unsigned int start_block:24;
|
|
+} __attribute__ ((packed)) squashfs_dir_inode_header;
|
|
+
|
|
+typedef union {
|
|
+ squashfs_base_inode_header base;
|
|
+ squashfs_dev_inode_header dev;
|
|
+ squashfs_symlink_inode_header symlink;
|
|
+ squashfs_reg_inode_header reg;
|
|
+ squashfs_dir_inode_header dir;
|
|
+ squashfs_ipc_inode_header ipc;
|
|
+} squashfs_inode_header;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int offset:13;
|
|
+ unsigned int type:3;
|
|
+ unsigned int size:8;
|
|
+ char name[0];
|
|
+} __attribute__ ((packed)) squashfs_dir_entry;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int count:8;
|
|
+ unsigned int start_block:24;
|
|
+} __attribute__ ((packed)) squashfs_dir_header;
|
|
+
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int start_block;
|
|
+ unsigned int size;
|
|
+} __attribute__ ((packed)) squashfs_fragment_entry;
|
|
+
|
|
+extern int squashfs_uncompress_block(void *d, int dstlen, void *s, int srclen);
|
|
+extern int squashfs_uncompress_init(void);
|
|
+extern int squashfs_uncompress_exit(void);
|
|
+
|
|
+/*
|
|
+ * macros to convert each packed bitfield structure from little endian to big
|
|
+ * endian and vice versa. These are needed when creating or using a filesystem on a
|
|
+ * machine with different byte ordering to the target architecture.
|
|
+ *
|
|
+ */
|
|
+
|
|
+#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(squashfs_super_block));\
|
|
+ SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\
|
|
+ SQUASHFS_SWAP((s)->inodes, d, 32, 32);\
|
|
+ SQUASHFS_SWAP((s)->bytes_used, d, 64, 32);\
|
|
+ SQUASHFS_SWAP((s)->uid_start, d, 96, 32);\
|
|
+ SQUASHFS_SWAP((s)->guid_start, d, 128, 32);\
|
|
+ SQUASHFS_SWAP((s)->inode_table_start, d, 160, 32);\
|
|
+ SQUASHFS_SWAP((s)->directory_table_start, d, 192, 32);\
|
|
+ SQUASHFS_SWAP((s)->s_major, d, 224, 16);\
|
|
+ SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\
|
|
+ SQUASHFS_SWAP((s)->block_size_1, d, 256, 16);\
|
|
+ SQUASHFS_SWAP((s)->block_log, d, 272, 16);\
|
|
+ SQUASHFS_SWAP((s)->flags, d, 288, 8);\
|
|
+ SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\
|
|
+ SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\
|
|
+ SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\
|
|
+ SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\
|
|
+ SQUASHFS_SWAP((s)->block_size, d, 408, 32);\
|
|
+ SQUASHFS_SWAP((s)->fragments, d, 440, 32);\
|
|
+ SQUASHFS_SWAP((s)->fragment_table_start, d, 472, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\
|
|
+ SQUASHFS_MEMSET(s, d, n);\
|
|
+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
|
|
+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
|
|
+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\
|
|
+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_ipc_inode_header))
|
|
+
|
|
+#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dev_inode_header));\
|
|
+ SQUASHFS_SWAP((s)->rdev, d, 32, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_symlink_inode_header));\
|
|
+ SQUASHFS_SWAP((s)->symlink_size, d, 32, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_reg_inode_header));\
|
|
+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 64, 32);\
|
|
+ SQUASHFS_SWAP((s)->fragment, d, 96, 32);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 128, 32);\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 160, SQUASHFS_MAX_FILE_SIZE_LOG);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_INODE_HEADER(s, d) {\
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dir_inode_header));\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 32, 19);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 51, 13);\
|
|
+ SQUASHFS_SWAP((s)->mtime, d, 64, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 96, 24);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_HEADER(s, d) {\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(squashfs_dir_header));\
|
|
+ SQUASHFS_SWAP((s)->count, d, 0, 8);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 8, 24);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_ENTRY(s, d) {\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(squashfs_dir_entry));\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\
|
|
+ SQUASHFS_SWAP((s)->type, d, 13, 3);\
|
|
+ SQUASHFS_SWAP((s)->size, d, 16, 8);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_FRAGMENT_ENTRY(s, d) {\
|
|
+ SQUASHFS_MEMSET(s, d, sizeof(squashfs_fragment_entry));\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 0, 32);\
|
|
+ SQUASHFS_SWAP((s)->size, d, 32, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_SHORTS(s, d, n) {\
|
|
+ int entry;\
|
|
+ int bit_position;\
|
|
+ SQUASHFS_MEMSET(s, d, n * 2);\
|
|
+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += 16)\
|
|
+ SQUASHFS_SWAP(s[entry], d, bit_position, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_INTS(s, d, n) {\
|
|
+ int entry;\
|
|
+ int bit_position;\
|
|
+ SQUASHFS_MEMSET(s, d, n * 4);\
|
|
+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += 32)\
|
|
+ SQUASHFS_SWAP(s[entry], d, bit_position, 32);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\
|
|
+ int entry;\
|
|
+ int bit_position;\
|
|
+ SQUASHFS_MEMSET(s, d, n * bits / 8);\
|
|
+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += bits)\
|
|
+ SQUASHFS_SWAP(s[entry], d, bit_position, bits);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_FRAGMENT_INDEXES(s, d, n) SQUASHFS_SWAP_INTS(s, d, n)
|
|
+
|
|
+#ifdef SQUASHFS_1_0_COMPATIBILITY
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+} __attribute__ ((packed)) squashfs_base_inode_header_1;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+ unsigned int type:4;
|
|
+ unsigned int offset:4;
|
|
+} __attribute__ ((packed)) squashfs_ipc_inode_header_1;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+ unsigned short rdev;
|
|
+} __attribute__ ((packed)) squashfs_dev_inode_header_1;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+ unsigned short symlink_size;
|
|
+ char symlink[0];
|
|
+} __attribute__ ((packed)) squashfs_symlink_inode_header_1;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+ time_t mtime;
|
|
+ squashfs_block start_block;
|
|
+ unsigned int file_size:SQUASHFS_MAX_FILE_SIZE_LOG;
|
|
+ unsigned short block_list[0];
|
|
+} __attribute__ ((packed)) squashfs_reg_inode_header_1;
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int inode_type:4;
|
|
+ unsigned int mode:12; /* protection */
|
|
+ unsigned int uid:4; /* index into uid table */
|
|
+ unsigned int guid:4; /* index into guid table */
|
|
+ unsigned int file_size:19;
|
|
+ unsigned int offset:13;
|
|
+ time_t mtime;
|
|
+ unsigned int start_block:24;
|
|
+} __attribute__ ((packed)) squashfs_dir_inode_header_1;
|
|
+
|
|
+#define SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, n) {\
|
|
+ SQUASHFS_MEMSET(s, d, n);\
|
|
+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
|
|
+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
|
|
+ SQUASHFS_SWAP((s)->uid, d, 16, 4);\
|
|
+ SQUASHFS_SWAP((s)->guid, d, 20, 4);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_IPC_INODE_HEADER_1(s, d) {\
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, sizeof(squashfs_ipc_inode_header_1));\
|
|
+ SQUASHFS_SWAP((s)->type, d, 24, 4);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 28, 4);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DEV_INODE_HEADER_1(s, d) {\
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, sizeof(squashfs_dev_inode_header_1));\
|
|
+ SQUASHFS_SWAP((s)->rdev, d, 24, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(s, d) {\
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_symlink_inode_header_1));\
|
|
+ SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_REG_INODE_HEADER_1(s, d) {\
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_reg_inode_header_1));\
|
|
+ SQUASHFS_SWAP((s)->mtime, d, 24, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 56, 32);\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 88, SQUASHFS_MAX_FILE_SIZE_LOG);\
|
|
+}
|
|
+
|
|
+#define SQUASHFS_SWAP_DIR_INODE_HEADER_1(s, d) {\
|
|
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dir_inode_header_1));\
|
|
+ SQUASHFS_SWAP((s)->file_size, d, 24, 19);\
|
|
+ SQUASHFS_SWAP((s)->offset, d, 43, 13);\
|
|
+ SQUASHFS_SWAP((s)->mtime, d, 56, 32);\
|
|
+ SQUASHFS_SWAP((s)->start_block, d, 88, 24);\
|
|
+}
|
|
+#endif
|
|
+
|
|
+#ifdef __KERNEL__
|
|
+/*
|
|
+ * macros used to swap each structure entry, taking into account
|
|
+ * bitfields and different bitfield placing conventions on differing architectures
|
|
+ */
|
|
+#include <asm/byteorder.h>
|
|
+#ifdef __BIG_ENDIAN
|
|
+ /* convert from little endian to big endian */
|
|
+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, b_pos)
|
|
+#else
|
|
+ /* convert from big endian to little endian */
|
|
+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, 64 - tbits - b_pos)
|
|
+#endif
|
|
+
|
|
+#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\
|
|
+ int bits;\
|
|
+ int b_pos = pos % 8;\
|
|
+ unsigned long long val = 0;\
|
|
+ unsigned char *s = (unsigned char *)p + (pos / 8);\
|
|
+ unsigned char *d = ((unsigned char *) &val) + 7;\
|
|
+ for(bits = 0; bits < (tbits + b_pos); bits += 8) \
|
|
+ *d-- = *s++;\
|
|
+ value = (val >> (SHIFT))/* & ((1 << tbits) - 1)*/;\
|
|
+}
|
|
+#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n);
|
|
+#endif
|
|
+#endif
|
|
diff -Nurb src/linux/linux.orig/include/linux/squashfs_fs_i.h src/linux/linux/include/linux/squashfs_fs_i.h
|
|
--- src/linux/linux.orig/include/linux/squashfs_fs_i.h 1969-12-31 19:00:00.000000000 -0500
|
|
+++ src/linux/linux/include/linux/squashfs_fs_i.h 2004-05-25 21:13:03.000000000 -0400
|
|
@@ -0,0 +1,33 @@
|
|
+#ifndef SQUASHFS_FS_I
|
|
+#define SQUASHFS_FS_I
|
|
+/*
|
|
+ * Squashfs
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004 Phillip Lougher <plougher@users.sourceforge.net>
|
|
+ *
|
|
+ * 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,
|
|
+ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * squashfs_fs_i.h
|
|
+ */
|
|
+
|
|
+typedef struct squashfs_inode_info {
|
|
+ unsigned int start_block;
|
|
+ unsigned int block_list_start;
|
|
+ unsigned int offset;
|
|
+ unsigned int fragment_start_block;
|
|
+ unsigned int fragment_size;
|
|
+ unsigned int fragment_offset;
|
|
+ } squashfs_inode_info;
|
|
+#endif
|
|
diff -Nurb src/linux/linux.orig/include/linux/squashfs_fs_sb.h src/linux/linux/include/linux/squashfs_fs_sb.h
|
|
--- src/linux/linux.orig/include/linux/squashfs_fs_sb.h 1969-12-31 19:00:00.000000000 -0500
|
|
+++ src/linux/linux/include/linux/squashfs_fs_sb.h 2004-05-25 21:13:03.000000000 -0400
|
|
@@ -0,0 +1,65 @@
|
|
+#ifndef SQUASHFS_FS_SB
|
|
+#define SQUASHFS_FS_SB
|
|
+/*
|
|
+ * Squashfs
|
|
+ *
|
|
+ * Copyright (c) 2002, 2003, 2004 Phillip Lougher <plougher@users.sourceforge.net>
|
|
+ *
|
|
+ * 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,
|
|
+ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
+ *
|
|
+ * squashfs_fs_sb.h
|
|
+ */
|
|
+
|
|
+#include <linux/squashfs_fs.h>
|
|
+
|
|
+typedef struct {
|
|
+ unsigned int block;
|
|
+ int length;
|
|
+ unsigned int next_index;
|
|
+ char *data;
|
|
+ } squashfs_cache;
|
|
+
|
|
+struct squashfs_fragment_cache {
|
|
+ unsigned int block;
|
|
+ int length;
|
|
+ unsigned int locked;
|
|
+ char *data;
|
|
+ };
|
|
+
|
|
+typedef struct squashfs_sb_info {
|
|
+ squashfs_super_block sBlk;
|
|
+ int devblksize;
|
|
+ int devblksize_log2;
|
|
+ int swap;
|
|
+ squashfs_cache *block_cache;
|
|
+ struct squashfs_fragment_cache *fragment;
|
|
+ int next_cache;
|
|
+ int next_fragment;
|
|
+ squashfs_uid *uid;
|
|
+ squashfs_uid *guid;
|
|
+ squashfs_fragment_index *fragment_index;
|
|
+ unsigned int read_size;
|
|
+ char *read_data;
|
|
+ char *read_page;
|
|
+ struct semaphore read_page_mutex;
|
|
+ struct semaphore block_cache_mutex;
|
|
+ struct semaphore fragment_mutex;
|
|
+ wait_queue_head_t waitq;
|
|
+ wait_queue_head_t fragment_wait_queue;
|
|
+ struct inode *(*iget)(struct super_block *s, squashfs_inode inode);
|
|
+ unsigned int (*read_blocklist)(struct inode *inode, int index, int readahead_blks,
|
|
+ char *block_list, char **block_p, unsigned int *bsize);
|
|
+ } squashfs_sb_info;
|
|
+#endif
|
|
diff -Nurb src/linux/linux.orig/init/do_mounts.c src/linux/linux/init/do_mounts.c
|
|
--- src/linux/linux.orig/init/do_mounts.c 2003-11-08 03:13:20.000000000 -0500
|
|
+++ src/linux/linux/init/do_mounts.c 2004-05-25 21:13:03.000000000 -0400
|
|
@@ -16,6 +16,7 @@
|
|
#include <linux/ext2_fs.h>
|
|
#include <linux/romfs_fs.h>
|
|
#include <linux/cramfs_fs.h>
|
|
+#include <linux/squashfs_fs.h>
|
|
|
|
#undef BUILD_CRAMDISK
|
|
|
|
@@ -470,6 +471,7 @@
|
|
* ext2
|
|
* romfs
|
|
* gzip
|
|
+ * squashfs
|
|
*/
|
|
static int __init
|
|
identify_ramdisk_image(int fd, int start_block)
|
|
@@ -479,6 +481,7 @@
|
|
struct ext2_super_block *ext2sb;
|
|
struct romfs_super_block *romfsb;
|
|
struct cramfs_super *cramfsb;
|
|
+ struct squashfs_super_block *squashfsb;
|
|
int nblocks = -1;
|
|
unsigned char *buf;
|
|
|
|
@@ -490,6 +493,7 @@
|
|
ext2sb = (struct ext2_super_block *) buf;
|
|
romfsb = (struct romfs_super_block *) buf;
|
|
cramfsb = (struct cramfs_super *) buf;
|
|
+ squashfsb = (struct squashfs_super_block *) buf;
|
|
memset(buf, 0xe5, size);
|
|
|
|
/*
|
|
@@ -536,6 +540,15 @@
|
|
goto done;
|
|
}
|
|
|
|
+ /* squashfs is at block zero too */
|
|
+ if (squashfsb->s_magic == SQUASHFS_MAGIC) {
|
|
+ printk(KERN_NOTICE
|
|
+ "RAMDISK: squashfs filesystem found at block %d\n",
|
|
+ start_block);
|
|
+ nblocks = (squashfsb->bytes_used+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
|
|
+ goto done;
|
|
+ }
|
|
+
|
|
/*
|
|
* Read block 1 to test for minix and ext2 superblock
|
|
*/
|
|
diff -Nurb src/linux/linux.orig/kernel/ksyms.c src/linux/linux/kernel/ksyms.c
|
|
--- src/linux/linux.orig/kernel/ksyms.c 2003-07-04 04:12:28.000000000 -0400
|
|
+++ src/linux/linux/kernel/ksyms.c 2004-05-25 21:12:24.000000000 -0400
|
|
@@ -482,9 +482,9 @@
|
|
EXPORT_SYMBOL(simple_strtoull);
|
|
EXPORT_SYMBOL(system_utsname); /* UTS data */
|
|
EXPORT_SYMBOL(uts_sem); /* UTS semaphore */
|
|
-#ifndef __mips__
|
|
+//#ifndef __mips__ //bite me. -mbm.
|
|
EXPORT_SYMBOL(sys_call_table);
|
|
-#endif
|
|
+//#endif
|
|
EXPORT_SYMBOL(machine_restart);
|
|
EXPORT_SYMBOL(machine_halt);
|
|
EXPORT_SYMBOL(machine_power_off);
|
|
diff -Nurb src/linux/linux.orig/lib/Config.in src/linux/linux/lib/Config.in
|
|
--- src/linux/linux.orig/lib/Config.in 2003-07-04 04:12:29.000000000 -0400
|
|
+++ src/linux/linux/lib/Config.in 2004-05-25 21:13:03.000000000 -0400
|
|
@@ -8,12 +8,14 @@
|
|
# Do we need the compression support?
|
|
#
|
|
if [ "$CONFIG_CRAMFS" = "y" -o \
|
|
+ "$CONFIG_SQUASHFS" = "y" -o \
|
|
"$CONFIG_PPP_DEFLATE" = "y" -o \
|
|
"$CONFIG_JFFS2_FS" = "y" -o \
|
|
"$CONFIG_ZISOFS_FS" = "y" ]; then
|
|
define_tristate CONFIG_ZLIB_INFLATE y
|
|
else
|
|
if [ "$CONFIG_CRAMFS" = "m" -o \
|
|
+ "$CONFIG_SQUASHFS" = "m" -o \
|
|
"$CONFIG_PPP_DEFLATE" = "m" -o \
|
|
"$CONFIG_JFFS2_FS" = "m" -o \
|
|
"$CONFIG_ZISOFS_FS" = "m" ]; then
|