path: root/target/linux/generic-2.6/patches/001-squashfs.patch

diff --new-file -urp linux-2.6.12/fs/Kconfig linux-2.6.12-squashfs2.2/fs/Kconfig
--- linux-2.6.12/fs/Kconfig	2005-06-17 20:48:29.000000000 +0100
+++ linux-2.6.12-squashfs2.2/fs/Kconfig	2005-07-04 02:35:35.000000000 +0100
@@ -1171,6 +1171,69 @@ config CRAMFS
 
 	  If unsure, say N.
 
+config SQUASHFS
+	tristate "SquashFS 2.0 - Squashed file system support"
+	select ZLIB_INFLATE
+	help
+	  Saying Y here includes support for SquashFs 2.0 (Compressed Read-Only File
+	  System).  Squashfs is a highly compressed read-only filesystem for Linux.
+	  It uses zlib compression to compress both files, inodes and directories.
+	  Inodes in the system are very small and all blocks are packed to minimise
+	  data overhead. Block sizes greater than 4K are supported up to a maximum of 64K.
+
+	  Squashfs is intended for general read-only filesystem use, for archival
+	  use (i.e. in cases where a .tar.gz file may be used), and in embedded
+	  systems where low overhead is needed.  Further information and filesystem tools
+	  are available from http://squashfs.sourceforge.net.
+
+	  If you want to compile this as a module ( = code which can be
+	  inserted in and removed from the running kernel whenever you want),
+	  say M here and read <file:Documentation/modules.txt>.  The module
+	  will be called squashfs.  Note that the root file system (the one
+	  containing the directory /) cannot be compiled as a module.
+
+	  If unsure, say N.
+
+config SQUASHFS_EMBEDDED
+
+	bool "Additional options for memory-constrained systems" 
+	depends on SQUASHFS
+	default n
+	help
+	  Saying Y here allows you to specify cache sizes and how Squashfs
+	  allocates memory.  This is only intended for memory constrained
+	  systems.
+
+	  If unsure, say N.
+
+config SQUASHFS_FRAGMENT_CACHE_SIZE
+	int "Number of fragments cached" if SQUASHFS_EMBEDDED
+	depends on SQUASHFS
+	default "3"
+	help
+	  By default SquashFS caches the last 3 fragments read from
+	  the filesystem.  Increasing this amount may mean SquashFS
+	  has to re-read fragments less often from disk, at the expense
+	  of extra system memory.  Decreasing this amount will mean
+	  SquashFS uses less memory at the expense of extra reads from disk.
+
+	  Note there must be at least one cached fragment.  Anything
+	  much more than three will probably not make much difference.
+
+config SQUASHFS_VMALLOC
+	bool "Use Vmalloc rather than Kmalloc" if SQUASHFS_EMBEDDED
+	depends on SQUASHFS
+	default n
+	help
+	  By default SquashFS uses kmalloc to obtain fragment cache memory.
+	  Kmalloc memory is the standard kernel allocator, but it can fail
+	  on memory constrained systems.  Because of the way Vmalloc works,
+	  Vmalloc can succeed when kmalloc fails.  Specifying this option
+	  will make SquashFS always use Vmalloc to allocate the
+	  fragment cache memory.
+
+	  If unsure, say N.
+
 config VXFS_FS
 	tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
 	help
diff --new-file -urp linux-2.6.12/fs/Makefile linux-2.6.12-squashfs2.2/fs/Makefile
--- linux-2.6.12/fs/Makefile	2005-06-17 20:48:29.000000000 +0100
+++ linux-2.6.12-squashfs2.2/fs/Makefile	2005-07-04 02:35:35.000000000 +0100
@@ -52,6 +52,7 @@ obj-$(CONFIG_EXT3_FS)		+= ext3/ # Before
 obj-$(CONFIG_JBD)		+= jbd/
 obj-$(CONFIG_EXT2_FS)		+= ext2/
 obj-$(CONFIG_CRAMFS)		+= cramfs/
+obj-$(CONFIG_SQUASHFS)		+= squashfs/
 obj-$(CONFIG_RAMFS)		+= ramfs/
 obj-$(CONFIG_HUGETLBFS)		+= hugetlbfs/
 obj-$(CONFIG_CODA_FS)		+= coda/
diff --new-file -urp linux-2.6.12/fs/squashfs/inode.c linux-2.6.12-squashfs2.2/fs/squashfs/inode.c
--- linux-2.6.12/fs/squashfs/inode.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.12-squashfs2.2/fs/squashfs/inode.c	2005-07-04 02:35:35.000000000 +0100
@@ -0,0 +1,1803 @@
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 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,
+ * 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.
+ *
+ * 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/smp_lock.h>
+#include <linux/slab.h>
+#include <linux/squashfs_fs_sb.h>
+#include <linux/squashfs_fs_i.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.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 void squashfs_put_super(struct super_block *);
+static int squashfs_statfs(struct super_block *, struct kstatfs *);
+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 *, struct nameidata *);
+static unsigned int read_data(struct super_block *s, char *buffer,
+		unsigned int index, unsigned 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 unsigned int read_blocklist(struct inode *inode, int index, int readahead_blks,
+		char *block_list, unsigned short **block_p, unsigned int *bsize);
+static void squashfs_put_super(struct super_block *s);
+static struct super_block *squashfs_get_sb(struct file_system_type *, int, const char *, void *);
+static struct inode *squashfs_alloc_inode(struct super_block *sb);
+static void squashfs_destroy_inode(struct inode *inode);
+static int init_inodecache(void);
+static void destroy_inodecache(void);
+
+#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, unsigned short **block_p, unsigned int *bsize);
+#endif
+
+DECLARE_MUTEX(read_data_mutex);
+
+static z_stream stream;
+
+static struct file_system_type squashfs_fs_type = {
+	.owner = THIS_MODULE,
+	.name = "squashfs",
+	.get_sb = squashfs_get_sb,
+	.kill_sb = kill_block_super,
+	.fs_flags = FS_REQUIRES_DEV
+	};
+
+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 = {
+	.alloc_inode = squashfs_alloc_inode,
+	.destroy_inode = squashfs_destroy_inode,
+	.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 inline struct squashfs_inode_info *SQUASHFS_I(struct inode *inode)
+{
+	return list_entry(inode, struct squashfs_inode_info, vfs_inode);
+}
+
+
+static struct buffer_head *get_block_length(struct super_block *s,
+				int *cur_index, int *offset, int *c_byte)
+{
+	squashfs_sb_info *msblk = s->s_fs_info;
+	unsigned short temp;
+	struct buffer_head *bh;
+
+	if (!(bh = sb_bread(s, *cur_index)))
+		goto out;
+
+	if (msblk->devblksize - *offset == 1) {
+		if (msblk->swap)
+			((unsigned char *) &temp)[1] = *((unsigned char *)
+				(bh->b_data + *offset));
+		else
+			((unsigned char *) &temp)[0] = *((unsigned char *)
+				(bh->b_data + *offset));
+		brelse(bh);
+		if (!(bh = sb_bread(s, ++(*cur_index))))
+			goto out;
+		if (msblk->swap)
+			((unsigned char *) &temp)[0] = *((unsigned char *)
+				bh->b_data); 
+		else
+			((unsigned char *) &temp)[1] = *((unsigned char *)
+				bh->b_data); 
+		*c_byte = temp;
+		*offset = 1;
+	} else {
+		if (msblk->swap) {
+			((unsigned char *) &temp)[1] = *((unsigned char *)
+				(bh->b_data + *offset));
+			((unsigned char *) &temp)[0] = *((unsigned char *)
+				(bh->b_data + *offset + 1)); 
+		} else {
+			((unsigned char *) &temp)[0] = *((unsigned char *)
+				(bh->b_data + *offset));
+			((unsigned char *) &temp)[1] = *((unsigned char *)
+				(bh->b_data + *offset + 1)); 
+		}
+		*c_byte = temp;
+		*offset += 2;
+	}
+
+	if (SQUASHFS_CHECK_DATA(msblk->sBlk.flags)) {
+		if (*offset == msblk->devblksize) {
+			brelse(bh);
+			if (!(bh = sb_bread(s, ++(*cur_index))))
+				goto out;
+			*offset = 0;
+		}
+		if (*((unsigned char *) (bh->b_data + *offset)) !=
+						SQUASHFS_MARKER_BYTE) {
+			ERROR("Metadata block marker corrupt @ %x\n",
+						*cur_index);
+			brelse(bh);
+			goto out;
+		}
+		(*offset)++;
+	}
+	return bh;
+
+out:
+	return NULL;
+}
+
+
+static unsigned int read_data(struct super_block *s, char *buffer,
+		unsigned int index, unsigned int length, unsigned int *next_index)
+{
+	squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+	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 = 0, k;
+	char *c_buffer;
+	unsigned int compressed;
+	unsigned int c_byte = length;
+
+	if(c_byte) {
+		bytes = msBlk->devblksize - offset;
+		compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte);
+		c_buffer = compressed ? msBlk->read_data : buffer;
+		c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(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 {
+		if(!(bh[0] = get_block_length(s, &cur_index, &offset, &c_byte)))
+			goto read_failure;
+
+		bytes = msBlk->devblksize - offset;
+		compressed = SQUASHFS_COMPRESSED(c_byte);
+		c_buffer = compressed ? 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]);
+		if (!buffer_uptodate(bh[k]))
+			goto block_release;
+		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 = (squashfs_sb_info *)s->s_fs_info;
+	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) {
+				wait_queue_t wait;
+
+				init_waitqueue_entry(&wait, current);
+				add_wait_queue(&msBlk->waitq, &wait);
+ 				up(&msBlk->block_cache_mutex);
+				set_current_state(TASK_UNINTERRUPTIBLE);
+				schedule();
+				set_current_state(TASK_RUNNING);
+				remove_wait_queue(&msBlk->waitq, &wait);
+				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 int get_fragment_location(struct super_block *s, unsigned int fragment, unsigned int *fragment_start_block, unsigned int *fragment_size)
+{
+	squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+	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 = (squashfs_sb_info *)s->s_fs_info;
+
+	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) {
+				wait_queue_t wait;
+
+				init_waitqueue_entry(&wait, current);
+				add_wait_queue(&msBlk->fragment_wait_queue, &wait);
+				up(&msBlk->fragment_mutex);
+				set_current_state(TASK_UNINTERRUPTIBLE);
+				schedule();
+				set_current_state(TASK_RUNNING);
+				remove_wait_queue(&msBlk->fragment_wait_queue, &wait);
+				continue;
+			}
+			msBlk->next_fragment = (msBlk->next_fragment + 1) % SQUASHFS_CACHED_FRAGMENTS;
+			
+			if(msBlk->fragment[i].data == NULL)
+				if(!(msBlk->fragment[i].data = (unsigned char *)
+							SQUASHFS_ALLOC(SQUASHFS_FILE_MAX_SIZE))) {
+					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,
+							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 = (squashfs_sb_info *)s->s_fs_info;
+	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.tv_sec = sBlk->mkfs_time;
+	i->i_atime.tv_sec = sBlk->mkfs_time;
+	i->i_ctime.tv_sec = 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.tv_sec = inodep.mtime;
+			i->i_atime.tv_sec = inodep.mtime;
+			i->i_ctime.tv_sec = inodep.mtime;
+			i->i_blocks = ((i->i_size - 1) >> 9) + 1;
+			i->i_blksize = PAGE_CACHE_SIZE;
+			SQUASHFS_I(i)->u.s1.fragment_start_block = SQUASHFS_INVALID_BLK;
+			SQUASHFS_I(i)->u.s1.fragment_offset = 0;
+			SQUASHFS_I(i)->start_block = inodep.start_block;
+			SQUASHFS_I(i)->block_list_start = next_block;
+			SQUASHFS_I(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.tv_sec = inodep.mtime;
+			i->i_atime.tv_sec = inodep.mtime;
+			i->i_ctime.tv_sec = inodep.mtime;
+			SQUASHFS_I(i)->start_block = inodep.start_block;
+			SQUASHFS_I(i)->offset = inodep.offset;
+			SQUASHFS_I(i)->u.s2.directory_index_count = 0;
+			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;
+			SQUASHFS_I(i)->start_block = next_block;
+			SQUASHFS_I(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, old_decode_dev(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 == 15)
+		i->i_gid = i->i_uid;
+	else
+		i->i_gid = msBlk->guid[inodeb.guid];
+
+	insert_inode_hash(i);
+	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 = (squashfs_sb_info *)s->s_fs_info;
+	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.tv_sec = sBlk->mkfs_time;
+	i->i_atime.tv_sec = sBlk->mkfs_time;
+	i->i_ctime.tv_sec = sBlk->mkfs_time;
+
+	i->i_uid = msBlk->uid[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;
+
+			SQUASHFS_I(i)->u.s1.fragment_start_block = SQUASHFS_INVALID_BLK;
+			if(inodep.fragment != SQUASHFS_INVALID_BLK && !get_fragment_location(s, inodep.fragment,
+							&SQUASHFS_I(i)->u.s1.fragment_start_block, &SQUASHFS_I(i)->u.s1.fragment_size))
+				goto failed_read;
+
+			SQUASHFS_I(i)->u.s1.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.tv_sec = inodep.mtime;
+			i->i_atime.tv_sec = inodep.mtime;
+			i->i_ctime.tv_sec = inodep.mtime;
+			i->i_blocks = ((i->i_size - 1) >> 9) + 1;
+			i->i_blksize = PAGE_CACHE_SIZE;
+			SQUASHFS_I(i)->start_block = inodep.start_block;
+			SQUASHFS_I(i)->block_list_start = next_block;
+			SQUASHFS_I(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.tv_sec = inodep.mtime;
+			i->i_atime.tv_sec = inodep.mtime;
+			i->i_ctime.tv_sec = inodep.mtime;
+			SQUASHFS_I(i)->start_block = inodep.start_block;
+			SQUASHFS_I(i)->offset = inodep.offset;
+			SQUASHFS_I(i)->u.s2.directory_index_count = 0;
+			TRACE("Directory inode %x:%x, start_block %x, offset %x\n", SQUASHFS_INODE_BLK(inode), offset,
+					inodep.start_block, inodep.offset);
+			break;
+		}
+		case SQUASHFS_LDIR_TYPE: {
+			squashfs_ldir_inode_header inodep;
+
+			if(msBlk->swap) {
+				squashfs_ldir_inode_header sinodep;
+
+				if(!squashfs_get_cached_block(s, (char *) &sinodep, block,  offset, sizeof(sinodep),
+							&next_block, &next_offset))
+					goto failed_read;
+				SQUASHFS_SWAP_LDIR_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.tv_sec = inodep.mtime;
+			i->i_atime.tv_sec = inodep.mtime;
+			i->i_ctime.tv_sec = inodep.mtime;
+			SQUASHFS_I(i)->start_block = inodep.start_block;
+			SQUASHFS_I(i)->offset = inodep.offset;
+			SQUASHFS_I(i)->u.s2.directory_index_start = next_block;
+			SQUASHFS_I(i)->u.s2.directory_index_offset = next_offset;
+			SQUASHFS_I(i)->u.s2.directory_index_count = inodep.i_count;
+			TRACE("Long 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;
+			SQUASHFS_I(i)->start_block = next_block;
+			SQUASHFS_I(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, old_decode_dev(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];
+
+	insert_inode_hash(i);
+	return i;
+
+failed_read:
+	ERROR("Unable to read inode [%x:%x]\n", block, offset);
+
+failed_read1:
+	return NULL;
+}
+
+
+static int squashfs_fill_super(struct super_block *s,
+		void *data, int silent)
+{
+	squashfs_sb_info *msBlk;
+	squashfs_super_block *sBlk;
+	int i;
+	char b[BDEVNAME_SIZE];
+
+	TRACE("Entered squashfs_read_superblock\n");
+
+	if(!(s->s_fs_info = (void *) kmalloc(sizeof(squashfs_sb_info), GFP_KERNEL))) {
+		ERROR("Failed to allocate superblock\n");
+		return -ENOMEM;
+	}
+	msBlk = (squashfs_sb_info *) s->s_fs_info;
+	sBlk = &msBlk->sBlk;
+	
+	msBlk->devblksize = sb_min_blocksize(s, BLOCK_SIZE);
+	msBlk->devblksize_log2 = ffz(~msBlk->devblksize);
+
+	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_BLOCK, 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(s->s_bdev, b));
+			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(s->s_bdev, b));
+			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(s->s_bdev, b));
+	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) {
+		if(!(msBlk->read_page = (char *) kmalloc(sBlk->block_size, GFP_KERNEL))) {
+			ERROR("Failed to allocate read_page block\n");
+			goto failed_mount2;
+		}
+	} else
+		msBlk->read_page = NULL;
+
+	/* 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_BLOCK, 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_BLOCK, 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 = NULL;
+		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_BLOCK, 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 0;
+
+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:
+	kfree(s->s_fs_info);
+	s->s_fs_info = NULL;
+	return -EINVAL;
+}
+
+
+static int squashfs_statfs(struct super_block *s, struct kstatfs *buf)
+{
+	squashfs_super_block *sBlk = &((squashfs_sb_info *)s->s_fs_info)->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;
+	unsigned int block = SQUASHFS_I(inode)->start_block;
+	int offset = SQUASHFS_I(inode)->offset;
+	void *pageaddr = kmap(page);
+
+	TRACE("Entered squashfs_symlink_readpage, page index %d, start block %x, offset %x\n",
+		page->index, SQUASHFS_I(inode)->start_block, SQUASHFS_I(inode)->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);
+	unlock_page(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, unsigned short **block_p, unsigned int *bsize)
+{
+	squashfs_sb_info *msBlk = (squashfs_sb_info *)inode->i_sb->s_fs_info;
+	unsigned short *block_listp;
+	int i = 0;
+	int block_ptr = SQUASHFS_I(inode)->block_list_start;
+	int offset = SQUASHFS_I(inode)->offset;
+	unsigned int block = SQUASHFS_I(inode)->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
+		*block_p = block_listp;
+	return block;
+}
+#endif
+
+
+static unsigned int read_blocklist(struct inode *inode, int index, int readahead_blks,
+		char *block_list, unsigned short **block_p, unsigned int *bsize)
+{
+	squashfs_sb_info *msBlk = (squashfs_sb_info *)inode->i_sb->s_fs_info;
+	unsigned int *block_listp;
+	int i = 0;
+	int block_ptr = SQUASHFS_I(inode)->block_list_start;
+	int offset = SQUASHFS_I(inode)->offset;
+	unsigned int block = SQUASHFS_I(inode)->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 = (squashfs_sb_info *)inode->i_sb->s_fs_info;
+	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 = NULL;
+	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,
+		SQUASHFS_I(inode)->start_block);
+
+	if(page->index >= ((inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT)) {
+		goto skip_read;
+	}
+
+	if(SQUASHFS_I(inode)->u.s1.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, 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, SQUASHFS_I(inode)->u.s1.fragment_start_block, SQUASHFS_I(inode)->u.s1.fragment_size)) == NULL) {
+			ERROR("Unable to read page, block %x, size %x\n", SQUASHFS_I(inode)->u.s1.fragment_start_block, (int) SQUASHFS_I(inode)->u.s1.fragment_size);
+			goto skip_read;
+		}
+		bytes = SQUASHFS_I(inode)->u.s1.fragment_offset + (inode->i_size & (sBlk->block_size - 1));
+		byte_offset = SQUASHFS_I(inode)->u.s1.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);
+			unlock_page(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);
+			unlock_page(push_page);
+			page_cache_release(push_page);
+		}
+	}
+
+	if(SQUASHFS_I(inode)->u.s1.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);
+	unlock_page(page);
+
+	return 0;
+}
+
+
+static int squashfs_readpage4K(struct file *file, struct page *page)
+{
+	struct inode *inode = page->mapping->host;
+	squashfs_sb_info *msBlk = (squashfs_sb_info *)inode->i_sb->s_fs_info;
+	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,
+		SQUASHFS_I(inode)->start_block);
+
+	if(page->index >= ((inode->i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT)) {
+		goto skip_read;
+	}
+
+	if(SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK || 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, 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, SQUASHFS_I(inode)->u.s1.fragment_start_block, SQUASHFS_I(inode)->u.s1.fragment_size)) == NULL)
+			ERROR("Unable to read page, block %x, size %x\n", SQUASHFS_I(inode)->u.s1.fragment_start_block, (int) SQUASHFS_I(inode)->u.s1.fragment_size);
+		else {
+			bytes = inode->i_size & (sBlk->block_size - 1);
+			memcpy(pageaddr, fragment->data + SQUASHFS_I(inode)->u.s1.fragment_offset, bytes);
+			release_cached_fragment(msBlk, fragment);
+		}
+	}
+
+skip_read:
+	memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
+	kunmap(page);
+	flush_dcache_page(page);
+	SetPageUptodate(page);
+	unlock_page(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 = (squashfs_sb_info *)inode->i_sb->s_fs_info;
+	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,
+		SQUASHFS_I(inode)->start_block);
+
+	block = read_blocklist_1(inode, index, readahead_blks, block_list, &block_listp, NULL);
+
+	if(i_end > file_blocks)
+		i_end = file_blocks;
+
+	while(index < i_end) {
+		int c_byte = !SQUASHFS_COMPRESSED(*block_listp) ? SQUASHFS_COMPRESSED_SIZE(*block_listp) | SQUASHFS_COMPRESSED_BIT_BLOCK : *block_listp;
+		if(!(byte = read_data(inode->i_sb, pageaddr, block, c_byte, 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);
+	unlock_page(page);
+
+	return 0;
+}
+#endif
+
+
+static int get_dir_index_using_offset(struct super_block *s, unsigned int *next_block,
+	unsigned int *next_offset, unsigned int index_start, unsigned int index_offset,
+	int i_count, long long f_pos)
+{
+	squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+	squashfs_super_block *sBlk = &msBlk->sBlk;
+	int i, length = 0;
+	squashfs_dir_index index;
+
+	TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n", i_count, (unsigned int) f_pos);
+
+	if(f_pos == 0)
+		return 0;
+
+	for(i = 0; i < i_count; i++) {
+		if(msBlk->swap) {
+			squashfs_dir_index sindex;
+			squashfs_get_cached_block(s, (char *) &sindex, index_start, index_offset,
+				sizeof(sindex), &index_start, &index_offset);
+			SQUASHFS_SWAP_DIR_INDEX(&index, &sindex);
+		} else
+			squashfs_get_cached_block(s, (char *) &index, index_start, index_offset,
+				sizeof(index), &index_start, &index_offset);
+
+		if(index.index > f_pos)
+			break;
+
+		squashfs_get_cached_block(s, NULL, index_start, index_offset,
+				index.size + 1, &index_start, &index_offset);
+
+		length = index.index;
+		*next_block = index.start_block + sBlk->directory_table_start;
+	}
+
+	*next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
+	return length;
+}
+
+
+static int get_dir_index_using_name(struct super_block *s, unsigned int *next_block,
+	unsigned int *next_offset, unsigned int index_start, unsigned int index_offset,
+	int i_count, const char *name, int size)
+{
+	squashfs_sb_info *msBlk = (squashfs_sb_info *)s->s_fs_info;
+	squashfs_super_block *sBlk = &msBlk->sBlk;
+	int i, length = 0;
+	char buffer[sizeof(squashfs_dir_index) + SQUASHFS_NAME_LEN + 1];
+	squashfs_dir_index *index = (squashfs_dir_index *) buffer;
+	char str[SQUASHFS_NAME_LEN + 1];
+
+	TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
+
+	strncpy(str, name, size);
+	str[size] = '\0';
+
+	for(i = 0; i < i_count; i++) {
+		if(msBlk->swap) {
+			squashfs_dir_index sindex;
+			squashfs_get_cached_block(s, (char *) &sindex, index_start, index_offset,
+				sizeof(sindex), &index_start, &index_offset);
+			SQUASHFS_SWAP_DIR_INDEX(index, &sindex);
+		} else
+			squashfs_get_cached_block(s, (char *) index, index_start, index_offset,
+				sizeof(squashfs_dir_index), &index_start, &index_offset);
+
+		squashfs_get_cached_block(s, index->name, index_start, index_offset,
+				index->size + 1, &index_start, &index_offset);
+
+		index->name[index->size + 1] = '\0';
+
+		if(strcmp(index->name, str) > 0)
+			break;
+
+		length = index->index;
+		*next_block = index->start_block + sBlk->directory_table_start;
+	}
+
+	*next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE;
+	return length;
+}
+
+		
+static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir)
+{
+	struct inode *i = file->f_dentry->d_inode;
+	squashfs_sb_info *msBlk = (squashfs_sb_info *)i->i_sb->s_fs_info;
+	squashfs_super_block *sBlk = &msBlk->sBlk;
+	int next_block = SQUASHFS_I(i)->start_block + sBlk->directory_table_start, next_offset =
+		SQUASHFS_I(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);
+
+	lock_kernel();
+
+	length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset, SQUASHFS_I(i)->u.s2.directory_index_start,
+		SQUASHFS_I(i)->u.s2.directory_index_offset, SQUASHFS_I(i)->u.s2.directory_index_count, file->f_pos);
+
+	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");
+				unlock_kernel();
+				return dirs_read;
+			}
+
+			file->f_pos = length;
+			dirs_read ++;
+		}
+	}
+
+	unlock_kernel();
+	return dirs_read;
+
+failed_read:
+	unlock_kernel();
+	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, struct nameidata *nd)
+{
+	const unsigned char *name =dentry->d_name.name;
+	int len = dentry->d_name.len;
+	struct inode *inode = NULL;
+	squashfs_sb_info *msBlk = (squashfs_sb_info *)i->i_sb->s_fs_info;
+	squashfs_super_block *sBlk = &msBlk->sBlk;
+	int next_block = SQUASHFS_I(i)->start_block + sBlk->directory_table_start, next_offset =
+		SQUASHFS_I(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;
+	int squashfs_2_1 = sBlk->s_major == 2 && sBlk->s_minor == 1;
+
+	TRACE("Entered squashfs_lookup [%x:%x]\n", next_block, next_offset);
+
+	lock_kernel();
+
+	length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset, SQUASHFS_I(i)->u.s2.directory_index_start,
+		SQUASHFS_I(i)->u.s2.directory_index_offset, SQUASHFS_I(i)->u.s2.directory_index_count, name, len);
+
+	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(squashfs_2_1 && name[0] < dire->name[0])
+				goto exit_loop;
+
+			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);
+	unlock_kernel();
+	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)
+{
+	int i;
+
+	if(s->s_fs_info) {
+		squashfs_sb_info *sbi = (squashfs_sb_info *) s->s_fs_info;
+		if(sbi->block_cache) {
+			for(i = 0; i < SQUASHFS_CACHED_BLKS; i++)
+				if(sbi->block_cache[i].block != SQUASHFS_INVALID_BLK)
+					kfree(sbi->block_cache[i].data);
+			kfree(sbi->block_cache);
+		}
+		if(sbi->read_data) kfree(sbi->read_data);
+		if(sbi->read_page) kfree(sbi->read_page);
+		if(sbi->uid) kfree(sbi->uid);
+		if(sbi->fragment) {
+			for(i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++) 
+				if(sbi->fragment[i].data != NULL)
+					SQUASHFS_FREE(sbi->fragment[i].data);
+			kfree(sbi->fragment);
+		}
+		if(sbi->fragment_index) kfree(sbi->fragment_index);
+		kfree(s->s_fs_info);
+		s->s_fs_info = NULL;
+	}
+}
+
+
+static struct super_block *squashfs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data)
+{
+	return get_sb_bdev(fs_type, flags, dev_name, data, squashfs_fill_super);
+}
+
+
+static int __init init_squashfs_fs(void)
+{
+	int err = init_inodecache();
+	if(err)
+		return err;
+
+	printk(KERN_INFO "Squashfs 2.2 (released 2005/07/03) (C) 2002-2005 Phillip Lougher\n");
+
+	if(!(stream.workspace = (char *) vmalloc(zlib_inflate_workspacesize()))) {
+		ERROR("Failed to allocate zlib workspace\n");
+		destroy_inodecache();
+		return -ENOMEM;
+	}
+
+	if((err = register_filesystem(&squashfs_fs_type))) {
+		vfree(stream.workspace);
+		destroy_inodecache();
+	}
+
+	return err;
+}
+
+
+static void __exit exit_squashfs_fs(void)
+{
+	vfree(stream.workspace);
+	unregister_filesystem(&squashfs_fs_type);
+	destroy_inodecache();
+}
+
+
+static kmem_cache_t * squashfs_inode_cachep;
+
+
+static struct inode *squashfs_alloc_inode(struct super_block *sb)
+{
+	struct squashfs_inode_info *ei;
+	ei = (struct squashfs_inode_info *)kmem_cache_alloc(squashfs_inode_cachep, SLAB_KERNEL);
+	if (!ei)
+		return NULL;
+	return &ei->vfs_inode;
+}
+
+
+static void squashfs_destroy_inode(struct inode *inode)
+{
+	kmem_cache_free(squashfs_inode_cachep, SQUASHFS_I(inode));
+}
+
+
+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
+{
+	struct squashfs_inode_info *ei = (struct squashfs_inode_info *) foo;
+
+	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+	    SLAB_CTOR_CONSTRUCTOR)
+		inode_init_once(&ei->vfs_inode);
+}
+ 
+
+static int init_inodecache(void)
+{
+	squashfs_inode_cachep = kmem_cache_create("squashfs_inode_cache",
+					     sizeof(struct squashfs_inode_info),
+					     0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT,
+					     init_once, NULL);
+	if (squashfs_inode_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+
+static void destroy_inodecache(void)
+{
+	if (kmem_cache_destroy(squashfs_inode_cachep))
+		printk(KERN_INFO "squashfs_inode_cache: not all structures were freed\n");
+}
+
+
+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 -urp linux-2.6.12/fs/squashfs/Makefile linux-2.6.12-squashfs2.2/fs/squashfs/Makefile
--- linux-2.6.12/fs/squashfs/Makefile	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.12-squashfs2.2/fs/squashfs/Makefile	2005-07-04 02:35:35.000000000 +0100
@@ -0,0 +1,7 @@
+#
+# Makefile for the linux squashfs routines.
+#
+
+obj-$(CONFIG_SQUASHFS) += squashfs.o
+
+squashfs-objs := inode.o
diff --new-file -urp linux-2.6.12/include/linux/squashfs_fs.h linux-2.6.12-squashfs2.2/include/linux/squashfs_fs.h
--- linux-2.6.12/include/linux/squashfs_fs.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.12-squashfs2.2/include/linux/squashfs_fs.h	2005-07-04 02:35:35.000000000 +0100
@@ -0,0 +1,519 @@
+#ifndef SQUASHFS_FS
+#define SQUASHFS_FS
+/*
+ * Squashfs
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 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,
+ * 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
+ */
+
+#ifdef	CONFIG_SQUASHFS_VMALLOC
+#define SQUASHFS_ALLOC(a)		vmalloc(a)
+#define SQUASHFS_FREE(a)		vfree(a)
+#else
+#define SQUASHFS_ALLOC(a)		kmalloc(a, GFP_KERNEL)
+#define SQUASHFS_FREE(a)		kfree(a)
+#endif
+#define SQUASHFS_CACHED_FRAGMENTS	CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE	
+#define SQUASHFS_MAJOR			2
+#define SQUASHFS_MINOR			1
+#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
+#define SQUASHFS_LDIR_TYPE		8
+
+/* 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))
+
+/* 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;
+	unsigned int		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		index:27;
+	unsigned int		start_block:29;
+	unsigned char		size;
+	unsigned char		name[0];
+} __attribute__ ((packed)) squashfs_dir_index;
+
+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 */
+	unsigned int		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;
+	unsigned int		mtime;
+	unsigned int		start_block:24;
+} __attribute__  ((packed)) squashfs_dir_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:27;
+	unsigned int		offset:13;
+	unsigned int		mtime;
+	unsigned int		start_block:24;
+	unsigned int		i_count:16;
+	squashfs_dir_index	index[0];
+} __attribute__  ((packed)) squashfs_ldir_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_ldir_inode_header	ldir;
+	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_LDIR_INODE_HEADER(s, d) {\
+	SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_ldir_inode_header));\
+	SQUASHFS_SWAP((s)->file_size, d, 32, 27);\
+	SQUASHFS_SWAP((s)->offset, d, 59, 13);\
+	SQUASHFS_SWAP((s)->mtime, d, 72, 32);\
+	SQUASHFS_SWAP((s)->start_block, d, 104, 24);\
+	SQUASHFS_SWAP((s)->i_count, d, 128, 16);\
+}
+
+#define SQUASHFS_SWAP_DIR_INDEX(s, d) {\
+	SQUASHFS_MEMSET(s, d, sizeof(squashfs_dir_index));\
+	SQUASHFS_SWAP((s)->index, d, 0, 27);\
+	SQUASHFS_SWAP((s)->start_block, d, 27, 29);\
+	SQUASHFS_SWAP((s)->size, d, 56, 8);\
+}
+
+#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 */
+	unsigned int		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;
+	unsigned int		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 --new-file -urp linux-2.6.12/include/linux/squashfs_fs_i.h linux-2.6.12-squashfs2.2/include/linux/squashfs_fs_i.h
--- linux-2.6.12/include/linux/squashfs_fs_i.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.12-squashfs2.2/include/linux/squashfs_fs_i.h	2005-07-04 02:35:35.000000000 +0100
@@ -0,0 +1,43 @@
+#ifndef SQUASHFS_FS_I
+#define SQUASHFS_FS_I
+/*
+ * Squashfs
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 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,
+ * 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;
+	union {
+		struct {
+			unsigned int	fragment_start_block;
+			unsigned int	fragment_size;
+			unsigned int	fragment_offset;
+		} s1;
+		struct {
+			unsigned int	directory_index_start;
+			unsigned int	directory_index_offset;
+			unsigned int	directory_index_count;
+		} s2;
+	} u;
+	struct inode	vfs_inode;
+	} squashfs_inode_info;
+#endif
diff --new-file -urp linux-2.6.12/include/linux/squashfs_fs_sb.h linux-2.6.12-squashfs2.2/include/linux/squashfs_fs_sb.h
--- linux-2.6.12/include/linux/squashfs_fs_sb.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.12-squashfs2.2/include/linux/squashfs_fs_sb.h	2005-07-04 02:35:35.000000000 +0100
@@ -0,0 +1,65 @@
+#ifndef SQUASHFS_FS_SB
+#define SQUASHFS_FS_SB
+/*
+ * Squashfs
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005 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,
+ * 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, unsigned short **block_p, unsigned int *bsize);
+	} squashfs_sb_info;
+#endif
diff --new-file -urp linux-2.6.12/init/do_mounts_rd.c linux-2.6.12-squashfs2.2/init/do_mounts_rd.c
--- linux-2.6.12/init/do_mounts_rd.c	2005-06-17 20:48:29.000000000 +0100
+++ linux-2.6.12-squashfs2.2/init/do_mounts_rd.c	2005-07-04 02:35:35.000000000 +0100
@@ -5,6 +5,7 @@
 #include <linux/ext2_fs.h>
 #include <linux/romfs_fs.h>
 #include <linux/cramfs_fs.h>
+#include <linux/squashfs_fs.h>
 #include <linux/initrd.h>
 #include <linux/string.h>
 
@@ -39,6 +40,7 @@ static int __init crd_load(int in_fd, in
  * numbers could not be found.
  *
  * We currently check for the following magic numbers:
+ *      squashfs
  * 	minix
  * 	ext2
  *	romfs
@@ -53,6 +55,7 @@ identify_ramdisk_image(int fd, int start
 	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;
 
@@ -64,6 +67,7 @@ identify_ramdisk_image(int fd, int start
 	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);
 
 	/*
@@ -101,6 +105,15 @@ identify_ramdisk_image(int fd, int start
 		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
 	 */