--- /dev/null
+diff --new-file -ur linux-2.4.24/fs/Config.in linux-2.4.24-squashfs1.3r3/fs/Config.in
+--- linux-2.4.24/fs/Config.in 2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.24-squashfs1.3r3/fs/Config.in 2004-01-17 23:02:20.000000000 +0000
+@@ -51,6 +51,7 @@
+ 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 --new-file -ur linux-2.4.24/fs/Makefile linux-2.4.24-squashfs1.3r3/fs/Makefile
+--- linux-2.4.24/fs/Makefile 2003-08-25 12:44:43.000000000 +0100
++++ linux-2.4.24-squashfs1.3r3/fs/Makefile 2004-01-17 23:02:20.000000000 +0000
+@@ -66,6 +66,7 @@
+ subdir-$(CONFIG_BEFS_FS) += befs
+ subdir-$(CONFIG_JFS_FS) += jfs
+ subdir-$(CONFIG_XFS_FS) += xfs
++subdir-$(CONFIG_SQUASHFS) += squashfs
+
+
+ obj-$(CONFIG_BINFMT_AOUT) += binfmt_aout.o
+diff --new-file -ur linux-2.4.24/fs/squashfs/inode.c linux-2.4.24-squashfs1.3r3/fs/squashfs/inode.c
+--- linux-2.4.24/fs/squashfs/inode.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.24-squashfs1.3r3/fs/squashfs/inode.c 2004-01-17 23:06:40.000000000 +0000
+@@ -0,0 +1,980 @@
++/*
++ * Squashfs - a compressed read only filesystem for Linux
++ *
++ * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ *
++ * inode.c
++ */
++
++#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_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, int length, 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 void squashfs_put_super(struct super_block *s);
++
++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 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, int length, 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 short c_byte;
++ 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;
++
++ if(!(bh[0] = sb_bread(s, cur_index)))
++ goto read_failure;
++
++ if(length)
++ c_byte = length;
++ else {
++ if(msBlk->devblksize - offset == 1) {
++ if(msBlk->swap)
++ ((unsigned char *) &c_byte)[1] = *((unsigned char *) (bh[0]->b_data + offset));
++ else
++ ((unsigned char *) &c_byte)[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 *) &c_byte)[0] = *((unsigned char *) bh[0]->b_data);
++ else
++ ((unsigned char *) &c_byte)[1] = *((unsigned char *) bh[0]->b_data);
++ offset = 1;
++ }
++ else {
++ if(msBlk->swap) {
++ ((unsigned char *) &c_byte)[1] = *((unsigned char *) (bh[0]->b_data + offset));
++ ((unsigned char *) &c_byte)[0] = *((unsigned char *) (bh[0]->b_data + offset + 1));
++ } 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;
++ 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_bread(s, ++cur_index)))
++ goto block_release;
++ bytes += msBlk->devblksize;
++ }
++
++ 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;
++ 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,
++ &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 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 == SQUASHFS_IPC_TYPE ? SQUASHFS_IPC_TYPE : (inodeb.inode_type - 1) % SQUASHFS_TYPES + 1) {
++ 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->i_size = inodep.file_size;
++ i->i_fop = &generic_ro_fops;
++ i->i_data.a_ops = &squashfs_aops;
++ 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\n",
++ SQUASHFS_INODE_BLK(inode), offset, inodep.start_block, next_block, next_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_IPC_TYPE: {
++ squashfs_ipc_inode_header inodep;
++
++ if(msBlk->swap) {
++ squashfs_ipc_inode_header 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(&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;
++}
++
++
++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_waitqueue_head(&msBlk->waitq);
++
++ if(!read_data(s, (char *) sBlk, SQUASHFS_START, sizeof(squashfs_super_block) | SQUASHFS_COMPRESSED_BIT, 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 */
++ 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;
++ }
++
++ 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);
++ 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);
++ 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, 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, NULL)) {
++ SERROR("unable to read uid/gid table\n");
++ goto failed_mount4;
++ }
++
++ if(!(s->s_root = d_alloc_root(squashfs_iget(s, sBlk->root_inode)))) {
++ ERROR("Root inode create failed\n");
++ goto failed_mount4;
++ }
++
++ TRACE("Leaving squashfs_read_super\n");
++ return s;
++
++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 %d, start block %x, offset %x\n",
++ 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
++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 short *block_listp;
++ int index = sBlk->block_log > PAGE_CACHE_SHIFT ?
++ page->index >> (sBlk->block_log - PAGE_CACHE_SHIFT) :
++ page->index << (PAGE_CACHE_SHIFT - sBlk->block_log);
++ int block = inode->u.squashfs_i.start_block, i = 0;
++ int bytes = 0, block_ptr = inode->u.squashfs_i.block_list_start;
++ int offset = inode->u.squashfs_i.offset;
++ int file_blocks = ((inode->i_size - 1) >> sBlk->block_log) + 1;
++ int readahead_blks = sBlk->block_log >= PAGE_CACHE_SHIFT ? 1 : 1 << (PAGE_CACHE_SHIFT - sBlk->block_log);
++ void *pageaddr = kmap(page);
++
++ TRACE("Entered squashfs_readpage, page index %d, start block %x\n", page->index,
++ inode->u.squashfs_i.start_block);
++
++ if(index > file_blocks)
++ goto skip_read;
++
++ 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);
++ goto skip_read;
++ }
++ 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);
++ goto skip_read;
++ }
++ 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(sBlk->block_log > PAGE_CACHE_SHIFT) {
++ int mask = (1 << (sBlk->block_log - PAGE_CACHE_SHIFT)) - 1;
++ int start_index = page->index & ~mask;
++ int end_index = start_index | mask;
++ int byte_offset = 0;
++
++ down(&msBlk->read_page_mutex);
++ if(!(bytes = read_data(inode->i_sb, msBlk->read_page, block, *block_listp, NULL))) {
++ ERROR("Unable to read page, block %x, size %x\n", block, (int) *block_listp);
++ goto skip_read;
++ }
++
++ for(i = start_index; i <= end_index && byte_offset < bytes; i++, byte_offset += PAGE_CACHE_SIZE) {
++ 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, msBlk->read_page + 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 {
++ struct page *push_page;
++
++ if((push_page = grab_cache_page_nowait(page->mapping, i))) {
++ void *pageaddr = kmap(push_page);
++ memcpy(pageaddr, msBlk->read_page + 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);
++ }
++ }
++ }
++ up( &msBlk->read_page_mutex);
++
++ return 0;
++
++ } else if(sBlk->block_log == PAGE_CACHE_SHIFT) {
++ if(!(bytes = read_data(inode->i_sb, pageaddr, block, *block_listp, NULL)))
++ ERROR("Unable to read page, block %x, size %x\n", block, (int) *block_listp);
++
++ } else {
++ int i_end = index + (1 << (PAGE_CACHE_SHIFT - sBlk->block_log));
++ char *p = (char *) pageaddr;
++ int byte;
++
++ if(i_end > file_blocks)
++ i_end = file_blocks;
++
++ while(index < i_end) {
++ if(!(byte = read_data(inode->i_sb, p, block, *block_listp, NULL))) {
++ ERROR("Unable to read page, block %x, size %x\n", block, (int) *block_listp);
++ goto skip_read;
++ }
++ block += SQUASHFS_COMPRESSED_SIZE(*block_listp);
++ p += byte;
++ bytes += byte;
++ index ++;
++ block_listp ++;
++ }
++ }
++
++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_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", 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(*dire);
++ 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 = squashfs_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 <phillip@lougher.demon.co.uk>");
++MODULE_LICENSE("GPL");
+diff --new-file -ur linux-2.4.24/fs/squashfs/Makefile linux-2.4.24-squashfs1.3r3/fs/squashfs/Makefile
+--- linux-2.4.24/fs/squashfs/Makefile 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.24-squashfs1.3r3/fs/squashfs/Makefile 2004-01-17 23:02:20.000000000 +0000
+@@ -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 --new-file -ur linux-2.4.24/include/linux/fs.h linux-2.4.24-squashfs1.3r3/include/linux/fs.h
+--- linux-2.4.24/include/linux/fs.h 2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.24-squashfs1.3r3/include/linux/fs.h 2004-01-17 23:02:20.000000000 +0000
+@@ -322,6 +322,7 @@
+ #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
+@@ -517,6 +518,7 @@
+ 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;
+ };
+@@ -731,6 +733,7 @@
+ #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;
+@@ -790,6 +793,7 @@
+ 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 --new-file -ur linux-2.4.24/include/linux/squashfs_fs.h linux-2.4.24-squashfs1.3r3/include/linux/squashfs_fs.h
+--- linux-2.4.24/include/linux/squashfs_fs.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.24-squashfs1.3r3/include/linux/squashfs_fs.h 2004-01-17 23:02:20.000000000 +0000
+@@ -0,0 +1,323 @@
++#ifndef SQUASHFS_FS
++#define SQUASHFS_FS
++/*
++ * Squashfs
++ *
++ * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ *
++ * squashfs_fs.h
++ */
++
++#define SQUASHFS_MAJOR 1
++#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 32768
++#define SQUASHFS_FILE_LOG 15
++
++#define SQUASHFS_FILE_MAX_SIZE 32768
++
++/* Max number of uids and gids */
++#define SQUASHFS_UIDS 48
++#define SQUASHFS_GUIDS 15
++
++/* 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 1
++#define SQUASHFS_NOD 2
++#define SQUASHFS_CHECK 4
++#define SQUASHFS_UNCOMPRESSED_INODES(flags) (flags & SQUASHFS_NOI)
++#define SQUASHFS_UNCOMPRESSED_DATA(flags) (flags & SQUASHFS_NOD)
++#define SQUASHFS_CHECK_DATA(flags) (flags & SQUASHFS_CHECK)
++#define SQUASHFS_MKFLAGS(noi, nod, check_data) (noi | (nod << 1) | (check_data << 2))
++
++/* Max number of types and file types */
++#define SQUASHFS_TYPES 5
++#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_IPC_TYPE 0
++#define SQUASHFS_FIFO_TYPE 6
++#define SQUASHFS_SOCKET_TYPE 7
++
++/* 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))
++
++/*
++ * 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)
++
++/* 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: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;
++} __attribute__ ((packed)) squashfs_super_block;
++
++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;
++
++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;
++
++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;
++
++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;
++
++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;
++
++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;
++
++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;
++
++
++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, 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);\
++}
++
++#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, 4);\
++ SQUASHFS_SWAP((s)->guid, d, 20, 4);\
++}
++
++#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) {\
++ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dev_inode_header));\
++ SQUASHFS_SWAP((s)->type, d, 24, 4);\
++ SQUASHFS_SWAP((s)->offset, d, 28, 4);\
++}
++#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, 24, 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, 24, 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, 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(s, d) {\
++ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dir_inode_header));\
++ 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);\
++}
++
++#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_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_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);\
++}
++
++#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));\
++}
++#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n);
++#endif
++#endif
+diff --new-file -ur linux-2.4.24/include/linux/squashfs_fs_i.h linux-2.4.24-squashfs1.3r3/include/linux/squashfs_fs_i.h
+--- linux-2.4.24/include/linux/squashfs_fs_i.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.24-squashfs1.3r3/include/linux/squashfs_fs_i.h 2004-01-17 23:02:20.000000000 +0000
+@@ -0,0 +1,21 @@
++#ifndef SQUASHFS_FS_I
++#define SQUASHFS_FS_I
++/*
++ * Squashfs
++ *
++ * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ *
++ * squashfs_fs_i.h
++ */
++
++typedef struct squashfs_inode_info {
++ unsigned int start_block;
++ unsigned int block_list_start;
++ unsigned int offset;
++ } squashfs_inode_info;
++#endif
+diff --new-file -ur linux-2.4.24/include/linux/squashfs_fs_sb.h linux-2.4.24-squashfs1.3r3/include/linux/squashfs_fs_sb.h
+--- linux-2.4.24/include/linux/squashfs_fs_sb.h 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.24-squashfs1.3r3/include/linux/squashfs_fs_sb.h 2004-01-17 23:02:21.000000000 +0000
+@@ -0,0 +1,41 @@
++#ifndef SQUASHFS_FS_SB
++#define SQUASHFS_FS_SB
++/*
++ * Squashfs
++ *
++ * Copyright (c) 2002 Phillip Lougher <phillip@lougher.demon.co.uk>
++ *
++ * This program is free software; you can redistribute it and/or
++ * modify it under the terms of the GNU General Public License
++ * as published by the Free Software Foundation; either version
++ * 2 of the License, or (at your option) any later version.
++ *
++ * squashfs_fs_sb.h
++ */
++
++#include <linux/squashfs_fs.h>
++
++typedef struct {
++ unsigned int block;
++ int length;
++ unsigned int next_index;
++ char *data;
++ } squashfs_cache;
++
++typedef struct squashfs_sb_info {
++ squashfs_super_block sBlk;
++ int devblksize;
++ int devblksize_log2;
++ int swap;
++ squashfs_cache *block_cache;
++ int next_cache;
++ squashfs_uid *uid;
++ squashfs_uid *guid;
++ unsigned int read_size;
++ char *read_data;
++ char *read_page;
++ struct semaphore read_page_mutex;
++ struct semaphore block_cache_mutex;
++ wait_queue_head_t waitq;
++ } squashfs_sb_info;
++#endif
+diff --new-file -ur linux-2.4.24/init/do_mounts.c linux-2.4.24-squashfs1.3r3/init/do_mounts.c
+--- linux-2.4.24/init/do_mounts.c 2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.24-squashfs1.3r3/init/do_mounts.c 2004-01-17 23:02:21.000000000 +0000
+@@ -15,6 +15,7 @@
+ #include <linux/minix_fs.h>
+ #include <linux/ext2_fs.h>
+ #include <linux/romfs_fs.h>
++#include <linux/squashfs_fs.h>
+ #include <linux/cramfs_fs.h>
+
+ #define BUILD_CRAMDISK
+@@ -476,6 +477,7 @@
+ * minix
+ * ext2
+ * romfs
++ * squashfs
+ * cramfs
+ * gzip
+ */
+@@ -486,6 +488,7 @@
+ struct minix_super_block *minixsb;
+ struct ext2_super_block *ext2sb;
+ struct romfs_super_block *romfsb;
++ struct squashfs_super_block *squashfsb;
+ struct cramfs_super *cramfsb;
+ int nblocks = -1;
+ unsigned char *buf;
+@@ -497,6 +500,7 @@
+ minixsb = (struct minix_super_block *) buf;
+ ext2sb = (struct ext2_super_block *) buf;
+ romfsb = (struct romfs_super_block *) buf;
++ squashfsb = (struct squashfs_super_block *) buf;
+ cramfsb = (struct cramfs_super *) buf;
+ memset(buf, 0xe5, size);
+
+@@ -535,6 +539,15 @@
+ 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 --new-file -ur linux-2.4.24/lib/Config.in linux-2.4.24-squashfs1.3r3/lib/Config.in
+--- linux-2.4.24/lib/Config.in 2003-11-28 18:26:21.000000000 +0000
++++ linux-2.4.24-squashfs1.3r3/lib/Config.in 2004-01-17 23:02:21.000000000 +0000
+@@ -10,6 +10,7 @@
+ # Do we need the compression support?
+ #
+ if [ "$CONFIG_CRAMFS" = "y" -o \
++ "$CONFIG_SQUASHFS" = "y" -o \
+ "$CONFIG_PPP_DEFLATE" = "y" -o \
+ "$CONFIG_CRYPTO_DEFLATE" = "y" -o \
+ "$CONFIG_JFFS2_FS" = "y" -o \
+@@ -17,6 +18,7 @@
+ define_tristate CONFIG_ZLIB_INFLATE y
+ else
+ if [ "$CONFIG_CRAMFS" = "m" -o \
++ "$CONFIG_SQUASHFS" = "m" -o \
+ "$CONFIG_PPP_DEFLATE" = "m" -o \
+ "$CONFIG_CRYPTO_DEFLATE" = "m" -o \
+ "$CONFIG_JFFS2_FS" = "m" -o \
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