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0491b78381
openwrt-xburst/obsolete-buildroot/sources/openwrt/kernel/patches/120-openwrt.patch
mbm b46fe1c707 sstrip, nas support, mppe support, mac os x patches, syslogd on bootup, inittab correction 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@136 3c298f89-4303-0410-b956-a3cf2f4a3e73
2004-08-17 23:00:52 +00:00

2522 lines
83 KiB
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diff -Nurb linux.orig/Makefile linux/Makefile
--- linux.orig/Makefile 2003-10-14 04:00:10.000000000 -0400
+++ linux/Makefile 2004-05-25 21:12:24.000000000 -0400
@@ -17,7 +17,7 @@
FINDHPATH = $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net $(HPATH)/math-emu
HOSTCC = gcc
-HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Os -fomit-frame-pointer
CROSS_COMPILE =
@@ -88,7 +88,7 @@
CPPFLAGS := -D__KERNEL__ -I$(HPATH)
-CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
+CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
-fno-strict-aliasing -fno-common
# Turn on -pg to instrument the kernel with calls to mcount().
diff -Nurb linux.orig/arch/mips/brcm-boards/bcm947xx/setup.c linux/arch/mips/brcm-boards/bcm947xx/setup.c
--- linux.orig/arch/mips/brcm-boards/bcm947xx/setup.c 2003-11-11 09:08:46.000000000 -0500
+++ linux/arch/mips/brcm-boards/bcm947xx/setup.c 2004-05-25 21:12:24.000000000 -0400
@@ -27,6 +27,7 @@
#include <linux/ext2_fs.h>
#include <linux/romfs_fs.h>
#include <linux/cramfs_fs.h>
+#include <linux/squashfs_fs.h>
#endif
#include <typedefs.h>
@@ -160,37 +161,38 @@
#ifdef CONFIG_MTD_PARTITIONS
static struct mtd_partition bcm947xx_parts[] = {
- { name: "pmon", offset: 0, size: 0, /*mask_flags: MTD_WRITEABLE,*/ },
+ { name: "pmon", offset: 0, size: 0, mask_flags: MTD_WRITEABLE, },
{ name: "linux", offset: 0, size: 0, },
{ name: "rootfs", offset: 0, size: 0, /*mask_flags: MTD_WRITEABLE,*/ },
{ name: "nvram", offset: 0, size: 0, },
+ { name: "OpenWrt", offset: 0, size: 0, },
{ name: NULL, },
};
-struct mtd_partition * __init
-init_mtd_partitions(struct mtd_info *mtd, size_t size)
+
+static int __init
+find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
{
- struct minix_super_block *minixsb;
- struct ext2_super_block *ext2sb;
- struct romfs_super_block *romfsb;
struct cramfs_super *cramfsb;
+ struct squashfs_super_block *squashfsb;
struct trx_header *trx;
+
unsigned char buf[512];
int off;
size_t len;
- minixsb = (struct minix_super_block *) buf;
- ext2sb = (struct ext2_super_block *) buf;
- romfsb = (struct romfs_super_block *) buf;
cramfsb = (struct cramfs_super *) buf;
+ squashfsb = (struct squashfs_super_block *) buf;
trx = (struct trx_header *) buf;
- /* Look at every 64 KB boundary */
- for (off = 0; off < size; off += (64 * 1024)) {
+ part->offset = 0;
+ part->size = 0;
+
+ for (off = 0; off < size; off += mtd->erasesize) {
memset(buf, 0xe5, sizeof(buf));
/*
- * Read block 0 to test for romfs and cramfs superblock
+ * Read block 0 to test for cramfs superblock
*/
if (MTD_READ(mtd, off, sizeof(buf), &len, buf) ||
len != sizeof(buf))
@@ -198,75 +200,105 @@
/* Try looking at TRX header for rootfs offset */
if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
- bcm947xx_parts[1].offset = off;
if (le32_to_cpu(trx->offsets[1]) > off)
off = le32_to_cpu(trx->offsets[1]);
continue;
}
- /* romfs is at block zero too */
- if (romfsb->word0 == ROMSB_WORD0 &&
- romfsb->word1 == ROMSB_WORD1) {
- printk(KERN_NOTICE
- "%s: romfs filesystem found at block %d\n",
- mtd->name, off / BLOCK_SIZE);
- goto done;
- }
-
- /* so is cramfs */
+ /* need to find cramfs */
if (cramfsb->magic == CRAMFS_MAGIC) {
printk(KERN_NOTICE
"%s: cramfs filesystem found at block %d\n",
mtd->name, off / BLOCK_SIZE);
- goto done;
- }
- /*
- * Read block 1 to test for minix and ext2 superblock
- */
- if (MTD_READ(mtd, off + BLOCK_SIZE, sizeof(buf), &len, buf) ||
- len != sizeof(buf))
- continue;
-
- /* Try minix */
- if (minixsb->s_magic == MINIX_SUPER_MAGIC ||
- minixsb->s_magic == MINIX_SUPER_MAGIC2) {
- printk(KERN_NOTICE
- "%s: Minix filesystem found at block %d\n",
- mtd->name, off / BLOCK_SIZE);
+ part->size = cramfsb->size;
goto done;
}
- /* Try ext2 */
- if (ext2sb->s_magic == cpu_to_le16(EXT2_SUPER_MAGIC)) {
+ /* or squashfs */
+ if (squashfsb->s_magic == SQUASHFS_MAGIC) {
printk(KERN_NOTICE
- "%s: ext2 filesystem found at block %d\n",
+ "%s: squashfs filesystem found at block %d\n",
mtd->name, off / BLOCK_SIZE);
+ part->size = squashfsb->bytes_used+2048;
goto done;
}
- }
+ }
printk(KERN_NOTICE
- "%s: Couldn't find valid ROM disk image\n",
+ "%s: Couldn't find valid cramfs image\n",
mtd->name);
+ return -1;
+
+done:
+ part->offset = off;
+ return 0;
+}
+
+
+struct mtd_partition * __init
+init_mtd_partitions(struct mtd_info *mtd, size_t size)
+{
+
+ bcm947xx_parts[0].offset=0;
+ bcm947xx_parts[0].size=256*1024;
- done:
/* Find and size nvram */
bcm947xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
bcm947xx_parts[3].size = size - bcm947xx_parts[3].offset;
/* Find and size rootfs */
- if (off < size) {
- bcm947xx_parts[2].offset = off;
- bcm947xx_parts[2].size = bcm947xx_parts[3].offset - bcm947xx_parts[2].offset;
- }
+ //if (off < size) {
+ // bcm947xx_parts[2].offset = off;
+ // bcm947xx_parts[2].size = bcm947xx_parts[3].offset - bcm947xx_parts[2].offset;
+ //}
+
+ /* Find and size rootfs */
+ find_root(mtd,size,&bcm947xx_parts[2]);
+
+
/* Size linux (kernel and rootfs) */
+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size;
bcm947xx_parts[1].size = bcm947xx_parts[3].offset - bcm947xx_parts[1].offset;
+
+
+ /* calculate leftover flash, and assign it to the jffs partition */
+ size_t spot;
+ size_t len;
+ size_t mask;
+ // get the offset to the end of the root_fs
+ spot=bcm947xx_parts[2].offset+bcm947xx_parts[2].size;
+ // round it up to an erase size boundary
+ spot+=mtd->erasesize-1;
+ // mask the number to the boundary
+ mask=mtd->erasesize;
+ mask=mask-1;
+ mask=mask^0xffffffff;
+ spot&=mask;
+ // length = flashsize - start position - nvram size
+ len=size-spot;
+ len=len-bcm947xx_parts[3].size;
+
+
+ bcm947xx_parts[4].offset = spot;
+ bcm947xx_parts[4].size = len;
+
+
+
+
/* Size pmon */
bcm947xx_parts[0].size = bcm947xx_parts[1].offset - bcm947xx_parts[0].offset;
+ //int x;
+ //for(x=0; x<5; x++) {
+ // printk(KERN_NOTICE
+ // "Partition %d mask_flags %08x\n",
+ // x,bcm947xx_parts[x].mask_flags);
+ //}
+
+
return bcm947xx_parts;
}
diff -Nurb linux.orig/drivers/mtd/maps/bcm947xx-flash.c linux/drivers/mtd/maps/bcm947xx-flash.c
--- linux.orig/drivers/mtd/maps/bcm947xx-flash.c 2003-11-08 04:35:52.000000000 -0500
+++ linux/drivers/mtd/maps/bcm947xx-flash.c 2004-05-25 21:12:24.000000000 -0400
@@ -82,7 +82,21 @@
void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
+ //memcpy_fromio(to, map->map_priv_1 + from, len);
+ if (len==1) {
memcpy_fromio(to, map->map_priv_1 + from, len);
+ } else {
+ int i;
+ u16 *dest = (u16 *) to;
+ u16 *src = (u16 *) (map->map_priv_1 + from);
+
+ for (i = 0; i < (len / 2); i++) {
+ dest[i] = src[i];
+ }
+
+ if (len & 1)
+ *((u8 *)dest+len-1) = src[i] & 0xff;
+ }
}
void bcm947xx_map_write8(struct map_info *map, __u8 d, unsigned long adr)
diff -Nurb linux.orig/drivers/net/Makefile linux/drivers/net/Makefile
--- linux.orig/drivers/net/Makefile 2004-02-12 21:35:15.000000000 -0500
+++ linux/drivers/net/Makefile 2004-05-25 21:12:24.000000000 -0400
@@ -25,7 +25,7 @@
list-multi := rcpci.o
rcpci-objs := rcpci45.o rclanmtl.o
-subdir-m += mac
+# subdir-m += mac
subdir-m += diag
ifeq ($(CONFIG_HW_QOS),y)
diff -Nurb linux.orig/fs/Config.in linux/fs/Config.in
--- linux.orig/fs/Config.in 2003-07-04 04:12:05.000000000 -0400
+++ linux/fs/Config.in 2004-05-25 21:13:03.000000000 -0400
@@ -47,6 +47,7 @@
int 'JFFS2 debugging verbosity (0 = quiet, 2 = noisy)' CONFIG_JFFS2_FS_DEBUG 0
fi
tristate 'Compressed ROM file system support' CONFIG_CRAMFS
+tristate 'Squashed file system support' CONFIG_SQUASHFS
bool 'Virtual memory file system support (former shm fs)' CONFIG_TMPFS
define_bool CONFIG_RAMFS y
diff -Nurb linux.orig/fs/Makefile linux/fs/Makefile
--- linux.orig/fs/Makefile 2003-07-04 04:12:05.000000000 -0400
+++ linux/fs/Makefile 2004-05-25 21:13:03.000000000 -0400
@@ -68,6 +68,7 @@
subdir-$(CONFIG_SUN_OPENPROMFS) += openpromfs
subdir-$(CONFIG_BEFS_FS) += befs
subdir-$(CONFIG_JFS_FS) += jfs
+subdir-$(CONFIG_SQUASHFS) += squashfs
obj-$(CONFIG_BINFMT_AOUT) += binfmt_aout.o
diff -Nurb linux.orig/fs/squashfs/Makefile linux/fs/squashfs/Makefile
--- linux.orig/fs/squashfs/Makefile 1969-12-31 19:00:00.000000000 -0500
+++ linux/fs/squashfs/Makefile 2004-05-25 21:13:03.000000000 -0400
@@ -0,0 +1,11 @@
+#
+# Makefile for the linux squashfs routines.
+#
+
+O_TARGET := squashfs.o
+
+obj-y := inode.o
+
+obj-m := $(O_TARGET)
+
+include $(TOPDIR)/Rules.make
diff -Nurb linux.orig/fs/squashfs/inode.c linux/fs/squashfs/inode.c
--- linux.orig/fs/squashfs/inode.c 1969-12-31 19:00:00.000000000 -0500
+++ linux/fs/squashfs/inode.c 2004-05-25 21:13:03.000000000 -0400
@@ -0,0 +1,1515 @@
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * 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 - a compressed read only filesystem for Linux
+ *
+ * inode.c
+ */
+
+#define SQUASHFS_1_0_COMPATIBILITY
+
+#include <linux/types.h>
+#include <linux/squashfs_fs.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/locks.h>
+#include <linux/init.h>
+#include <linux/dcache.h>
+#include <asm/uaccess.h>
+#include <linux/wait.h>
+#include <asm/semaphore.h>
+#include <linux/zlib.h>
+#include <linux/blkdev.h>
+#include <linux/vmalloc.h>
+
+#ifdef SQUASHFS_TRACE
+#define TRACE(s, args...) printk(KERN_NOTICE "SQUASHFS: "s, ## args)
+#else
+#define TRACE(s, args...) {}
+#endif
+
+#define ERROR(s, args...) printk(KERN_ERR "SQUASHFS error: "s, ## args)
+
+#define SERROR(s, args...) if(!silent) printk(KERN_ERR "SQUASHFS error: "s, ## args)
+#define WARNING(s, args...) printk(KERN_WARNING "SQUASHFS: "s, ## args)
+
+static struct super_block *squashfs_read_super(struct super_block *, void *, int);
+static void squashfs_put_super(struct super_block *);
+static int squashfs_statfs(struct super_block *, struct statfs *);
+static int squashfs_symlink_readpage(struct file *file, struct page *page);
+static int squashfs_readpage(struct file *file, struct page *page);
+static int squashfs_readpage4K(struct file *file, struct page *page);
+static int squashfs_readdir(struct file *, void *, filldir_t);
+static struct dentry *squashfs_lookup(struct inode *, struct dentry *);
+static unsigned int read_data(struct super_block *s, char *buffer,
+ unsigned int index, unsigned int length, int, unsigned int *next_index);
+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);
+static struct inode *squashfs_iget(struct super_block *s, squashfs_inode inode);
+static unsigned int read_blocklist(struct inode *inode, int index, int readahead_blks,
+ char *block_list, char **block_p, unsigned int *bsize);
+static void squashfs_put_super(struct super_block *s);
+
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+static int squashfs_readpage_lessthan4K(struct file *file, struct page *page);
+static struct inode *squashfs_iget_1(struct super_block *s, squashfs_inode inode);
+static unsigned int read_blocklist_1(struct inode *inode, int index, int readahead_blks,
+ char *block_list, char **block_p, unsigned int *bsize);
+#endif
+
+DECLARE_MUTEX(read_data_mutex);
+
+static z_stream stream;
+
+static DECLARE_FSTYPE_DEV(squashfs_fs_type, "squashfs", squashfs_read_super);
+
+static unsigned char squashfs_filetype_table[] = {
+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
+};
+
+static struct super_operations squashfs_ops = {
+ statfs: squashfs_statfs,
+ put_super: squashfs_put_super,
+};
+
+static struct address_space_operations squashfs_symlink_aops = {
+ readpage: squashfs_symlink_readpage
+};
+
+static struct address_space_operations squashfs_aops = {
+ readpage: squashfs_readpage
+};
+
+static struct address_space_operations squashfs_aops_4K = {
+ readpage: squashfs_readpage4K
+};
+
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+static struct address_space_operations squashfs_aops_lessthan4K = {
+ readpage: squashfs_readpage_lessthan4K
+};
+#endif
+
+static struct file_operations squashfs_dir_ops = {
+ read: generic_read_dir,
+ readdir: squashfs_readdir
+};
+
+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 linux.orig/include/linux/fs.h linux/include/linux/fs.h
--- linux.orig/include/linux/fs.h 2003-07-04 04:12:25.000000000 -0400
+++ 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 linux.orig/include/linux/squashfs_fs.h linux/include/linux/squashfs_fs.h
--- linux.orig/include/linux/squashfs_fs.h 1969-12-31 19:00:00.000000000 -0500
+++ 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 linux.orig/include/linux/squashfs_fs_i.h linux/include/linux/squashfs_fs_i.h
--- linux.orig/include/linux/squashfs_fs_i.h 1969-12-31 19:00:00.000000000 -0500
+++ 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 linux.orig/include/linux/squashfs_fs_sb.h linux/include/linux/squashfs_fs_sb.h
--- linux.orig/include/linux/squashfs_fs_sb.h 1969-12-31 19:00:00.000000000 -0500
+++ 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 linux.orig/init/do_mounts.c linux/init/do_mounts.c
--- linux.orig/init/do_mounts.c 2003-11-08 03:13:20.000000000 -0500
+++ 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 linux.orig/kernel/ksyms.c linux/kernel/ksyms.c
--- linux.orig/kernel/ksyms.c 2003-07-04 04:12:28.000000000 -0400
+++ 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 linux.orig/lib/Config.in linux/lib/Config.in
--- linux.orig/lib/Config.in 2003-07-04 04:12:29.000000000 -0400
+++ 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
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