kernel26-alx/patches-2.6.28-r2/0152-2.6.28-squashfs-3.4-2.patch

diff -Naur linux-2.6.28/fs/Kconfig linux-2.6.28-magellan/fs/Kconfig
--- linux-2.6.28/fs/Kconfig	2008-12-25 00:26:37.000000000 +0100
+++ linux-2.6.28-magellan/fs/Kconfig	2009-01-25 11:13:12.000000000 +0100
@@ -931,6 +931,56 @@
 
 	  If unsure, say N.
 
+config SQUASHFS
+	tristate "SquashFS 3.4 - Squashed file system support"
+	select ZLIB_INFLATE
+	help
+	  Saying Y here includes support for SquashFS 3.4 (a 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 1 Mbytes (default
+	  block size 128K).  SquashFS 3.3 supports 64 bit filesystems and files
+	  (larger than 4GB), full uid/gid information, hard links and timestamps.  
+
+	  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 option for memory-constrained systems" 
+	depends on SQUASHFS
+	default n
+	help
+	  Saying Y here allows you to specify cache size.
+
+	  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 VXFS_FS
 	tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
 	depends on BLOCK
diff -Naur linux-2.6.28/fs/Makefile linux-2.6.28-magellan/fs/Makefile
--- linux-2.6.28/fs/Makefile	2008-12-25 00:26:37.000000000 +0100
+++ linux-2.6.28-magellan/fs/Makefile	2009-01-25 11:13:12.000000000 +0100
@@ -76,6 +76,7 @@
 obj-$(CONFIG_JBD2)		+= jbd2/
 obj-$(CONFIG_EXT2_FS)		+= ext2/
 obj-$(CONFIG_CRAMFS)		+= cramfs/
+obj-$(CONFIG_SQUASHFS)		+= squashfs/
 obj-y				+= ramfs/
 obj-$(CONFIG_HUGETLBFS)		+= hugetlbfs/
 obj-$(CONFIG_CODA_FS)		+= coda/
diff -Naur linux-2.6.28/fs/squashfs/inode.c linux-2.6.28-magellan/fs/squashfs/inode.c
--- linux-2.6.28/fs/squashfs/inode.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.28-magellan/fs/squashfs/inode.c	2009-01-25 11:14:26.000000000 +0100
@@ -0,0 +1,2157 @@
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ * 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
+ */
+
+#include <linux/squashfs_fs.h>
+#include <linux/module.h>
+#include <linux/zlib.h>
+#include <linux/fs.h>
+#include <linux/squashfs_fs_sb.h>
+#include <linux/squashfs_fs_i.h>
+#include <linux/buffer_head.h>
+#include <linux/vfs.h>
+#include <linux/vmalloc.h>
+#include <linux/spinlock.h>
+#include <linux/smp_lock.h>
+#include <linux/exportfs.h>
+
+#include "squashfs.h"
+
+static struct dentry *squashfs_fh_to_dentry(struct super_block *s,
+		struct fid *fid, int fh_len, int fh_type);
+static struct dentry *squashfs_fh_to_parent(struct super_block *s,
+		struct fid *fid, int fh_len, int fh_type);
+static struct dentry *squashfs_get_parent(struct dentry *child);
+static int squashfs_read_inode(struct inode *i, squashfs_inode_t inode);
+static int squashfs_statfs(struct dentry *, struct kstatfs *);
+static int squashfs_symlink_readpage(struct file *file, struct page *page);
+static long long read_blocklist(struct inode *inode, int index,
+				int readahead_blks, char *block_list,
+				unsigned short **block_p, unsigned int *bsize);
+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 *,
+				struct nameidata *);
+static int squashfs_remount(struct super_block *s, int *flags, char *data);
+static void squashfs_put_super(struct super_block *);
+static int squashfs_get_sb(struct file_system_type *,int, const char *, void *,
+				struct vfsmount *);
+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);
+
+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 const 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_super_ops = {
+	.alloc_inode = squashfs_alloc_inode,
+	.destroy_inode = squashfs_destroy_inode,
+	.statfs = squashfs_statfs,
+	.put_super = squashfs_put_super,
+	.remount_fs = squashfs_remount
+};
+
+static struct export_operations squashfs_export_ops = {
+	.fh_to_dentry = squashfs_fh_to_dentry,
+	.fh_to_parent = squashfs_fh_to_parent,
+	.get_parent = squashfs_get_parent
+};
+
+SQSH_EXTERN const struct address_space_operations squashfs_symlink_aops = {
+	.readpage = squashfs_symlink_readpage
+};
+
+SQSH_EXTERN const struct address_space_operations squashfs_aops = {
+	.readpage = squashfs_readpage
+};
+
+static const struct file_operations squashfs_dir_ops = {
+	.read = generic_read_dir,
+	.readdir = squashfs_readdir
+};
+
+SQSH_EXTERN struct inode_operations squashfs_dir_inode_ops = {
+	.lookup = squashfs_lookup
+};
+
+
+static struct buffer_head *get_block_length(struct super_block *s,
+				int *cur_index, int *offset, int *c_byte)
+{
+	struct 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;
+}
+
+
+SQSH_EXTERN unsigned int squashfs_read_data(struct super_block *s, char *buffer,
+			long long index, unsigned int length,
+			long long *next_index, int srclength)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	struct buffer_head **bh;
+	unsigned int offset = index & ((1 << msblk->devblksize_log2) - 1);
+	unsigned int cur_index = index >> msblk->devblksize_log2;
+	int bytes, avail_bytes, b = 0, k = 0;
+	unsigned int compressed;
+	unsigned int c_byte = length;
+
+	bh = kmalloc(((sblk->block_size >> msblk->devblksize_log2) + 1) *
+								sizeof(struct buffer_head *), GFP_KERNEL);
+	if (bh == NULL)
+		goto read_failure;
+
+	if (c_byte) {
+		bytes = -offset;
+		compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte);
+		c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte);
+
+		TRACE("Block @ 0x%llx, %scompressed size %d, src size %d\n", index,
+					compressed ? "" : "un", (unsigned int) c_byte, srclength);
+
+		if (c_byte > srclength || index < 0 || (index + c_byte) > sblk->bytes_used)
+			goto read_failure;
+
+		for (b = 0; bytes < (int) c_byte; b++, cur_index++) {
+			bh[b] = sb_getblk(s, cur_index);
+			if (bh[b] == NULL)
+				goto block_release;
+			bytes += msblk->devblksize;
+		}
+		ll_rw_block(READ, b, bh);
+	} else {
+		if (index < 0 || (index + 2) > sblk->bytes_used)
+			goto read_failure;
+
+		bh[0] = get_block_length(s, &cur_index, &offset, &c_byte);
+		if (bh[0] == NULL)
+			goto read_failure;
+		b = 1;
+
+		bytes = msblk->devblksize - offset;
+		compressed = SQUASHFS_COMPRESSED(c_byte);
+		c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte);
+
+		TRACE("Block @ 0x%llx, %scompressed size %d\n", index, compressed
+					? "" : "un", (unsigned int) c_byte);
+
+		if (c_byte > srclength || (index + c_byte) > sblk->bytes_used)
+			goto block_release;
+
+		for (; bytes < c_byte; b++) {
+			bh[b] = sb_getblk(s, ++cur_index);
+			if (bh[b] == NULL)
+				goto block_release;
+			bytes += msblk->devblksize;
+		}
+		ll_rw_block(READ, b - 1, bh + 1);
+	}
+
+	if (compressed) {
+		int zlib_err = 0;
+
+		/*
+	 	* uncompress block
+	 	*/
+
+		mutex_lock(&msblk->read_data_mutex);
+
+		msblk->stream.next_out = buffer;
+		msblk->stream.avail_out = srclength;
+
+		for (bytes = 0; k < b; k++) {
+			avail_bytes = min(c_byte - bytes, msblk->devblksize - offset);
+
+			wait_on_buffer(bh[k]);
+			if (!buffer_uptodate(bh[k]))
+				goto release_mutex;
+
+			msblk->stream.next_in = bh[k]->b_data + offset;
+			msblk->stream.avail_in = avail_bytes;
+
+			if (k == 0) {
+				zlib_err = zlib_inflateInit(&msblk->stream);
+				if (zlib_err != Z_OK) {
+					ERROR("zlib_inflateInit returned unexpected result 0x%x,"
+						" srclength %d\n", zlib_err, srclength);
+					goto release_mutex;
+				}
+
+				if (avail_bytes == 0) {
+					offset = 0;
+					brelse(bh[k]);
+					continue;
+				}
+			}
+
+			zlib_err = zlib_inflate(&msblk->stream, Z_NO_FLUSH);
+			if (zlib_err != Z_OK && zlib_err != Z_STREAM_END) {
+				ERROR("zlib_inflate returned unexpected result 0x%x,"
+					" srclength %d, avail_in %d, avail_out %d\n", zlib_err,
+					srclength, msblk->stream.avail_in, msblk->stream.avail_out);
+				goto release_mutex;
+			}
+
+			bytes += avail_bytes;
+			offset = 0;
+			brelse(bh[k]);
+		}
+
+		if (zlib_err != Z_STREAM_END)
+			goto release_mutex;
+
+		zlib_err = zlib_inflateEnd(&msblk->stream);
+		if (zlib_err != Z_OK) {
+			ERROR("zlib_inflateEnd returned unexpected result 0x%x,"
+				" srclength %d\n", zlib_err, srclength);
+			goto release_mutex;
+		}
+		bytes = msblk->stream.total_out;
+		mutex_unlock(&msblk->read_data_mutex);
+	} else {
+		int i;
+
+		for(i = 0; i < b; i++) {
+			wait_on_buffer(bh[i]);
+			if (!buffer_uptodate(bh[i]))
+				goto block_release;
+		}
+
+		for (bytes = 0; k < b; k++) {
+			avail_bytes = min(c_byte - bytes, msblk->devblksize - offset);
+
+			memcpy(buffer + bytes, bh[k]->b_data + offset, avail_bytes);
+			bytes += avail_bytes;
+			offset = 0;
+			brelse(bh[k]);
+		}
+	}
+
+	if (next_index)
+		*next_index = index + c_byte + (length ? 0 :
+				(SQUASHFS_CHECK_DATA(msblk->sblk.flags) ? 3 : 2));
+
+	kfree(bh);
+	return bytes;
+
+release_mutex:
+	mutex_unlock(&msblk->read_data_mutex);
+
+block_release:
+	for (; k < b; k++)
+		brelse(bh[k]);
+
+read_failure:
+	ERROR("sb_bread failed reading block 0x%x\n", cur_index);
+	kfree(bh);
+	return 0;
+}
+
+
+static struct squashfs_cache_entry *squashfs_cache_get(struct super_block *s,
+	struct squashfs_cache *cache, long long block, int length)
+{
+	int i, n;
+	struct squashfs_cache_entry *entry;
+
+	spin_lock(&cache->lock);
+
+	while (1) {
+		for (i = 0; i < cache->entries && cache->entry[i].block != block; i++);
+
+		if (i == cache->entries) {
+			if (cache->unused_blks == 0) {
+				cache->waiting ++;
+				spin_unlock(&cache->lock);
+				wait_event(cache->wait_queue, cache->unused_blks);
+				spin_lock(&cache->lock);
+				cache->waiting --;
+				continue;
+			}
+
+			i = cache->next_blk;
+			for (n = 0; n < cache->entries; n++) {
+				if (cache->entry[i].locked == 0)
+					break;
+				i = (i + 1) % cache->entries;
+			}
+
+			cache->next_blk = (i + 1) % cache->entries;
+			entry = &cache->entry[i];
+
+			cache->unused_blks --;
+			entry->block = block;
+			entry->locked = 1;
+			entry->pending = 1;
+			entry->waiting = 0;
+			entry->error = 0;
+			spin_unlock(&cache->lock);
+
+			entry->length = squashfs_read_data(s, entry->data,
+				block, length, &entry->next_index, cache->block_size);
+
+			spin_lock(&cache->lock);
+
+			if (entry->length == 0)
+				entry->error = 1;
+
+			entry->pending = 0;
+			spin_unlock(&cache->lock);
+			if (entry->waiting)
+				wake_up_all(&entry->wait_queue);
+			goto out;
+		}
+
+		entry = &cache->entry[i];
+		if (entry->locked == 0)
+			cache->unused_blks --;
+		entry->locked++;
+
+		if (entry->pending) {
+			entry->waiting ++;
+			spin_unlock(&cache->lock);
+			wait_event(entry->wait_queue, !entry->pending);
+			goto out;
+		}
+
+		spin_unlock(&cache->lock);
+		goto out;
+	}
+
+out:
+	TRACE("Got %s %d, start block %lld, locked %d, error %d\n", i,
+		cache->name, entry->block, entry->locked, entry->error);
+	if (entry->error)
+		ERROR("Unable to read %s cache entry [%llx]\n", cache->name, block);
+	return entry;
+}
+
+
+static void squashfs_cache_put(struct squashfs_cache *cache,
+				struct squashfs_cache_entry *entry)
+{
+	spin_lock(&cache->lock);
+	entry->locked --;
+	if (entry->locked == 0) {
+		cache->unused_blks ++;
+		spin_unlock(&cache->lock);
+		if (cache->waiting)
+			wake_up(&cache->wait_queue);
+	} else
+		spin_unlock(&cache->lock);
+}
+
+
+static void squashfs_cache_delete(struct squashfs_cache *cache)
+{
+	int i;
+
+	if (cache == NULL)
+		return;
+
+	for (i = 0; i < cache->entries; i++)
+		if (cache->entry[i].data) {
+			if (cache->use_vmalloc)
+				vfree(cache->entry[i].data);
+			else
+				kfree(cache->entry[i].data);
+		}
+
+	kfree(cache);
+}
+
+
+static struct squashfs_cache *squashfs_cache_init(char *name, int entries,
+	int block_size, int use_vmalloc)
+{
+	int i;
+	struct squashfs_cache *cache = kzalloc(sizeof(struct squashfs_cache) +
+			entries * sizeof(struct squashfs_cache_entry), GFP_KERNEL);
+	if (cache == NULL) {
+		ERROR("Failed to allocate %s cache\n", name);
+		goto failed;
+	}
+
+	cache->next_blk = 0;
+	cache->unused_blks = entries;
+	cache->entries = entries;
+	cache->block_size = block_size;
+	cache->use_vmalloc = use_vmalloc;
+	cache->name = name;
+	cache->waiting = 0;
+	spin_lock_init(&cache->lock);
+	init_waitqueue_head(&cache->wait_queue);
+
+	for (i = 0; i < entries; i++) {
+		init_waitqueue_head(&cache->entry[i].wait_queue);
+		cache->entry[i].block = SQUASHFS_INVALID_BLK;
+		cache->entry[i].data = use_vmalloc ? vmalloc(block_size) :
+				kmalloc(block_size, GFP_KERNEL);
+		if (cache->entry[i].data == NULL) {
+			ERROR("Failed to allocate %s cache entry\n", name);
+			goto cleanup;
+		}
+	}
+
+	return cache;
+
+cleanup:
+	squashfs_cache_delete(cache);
+failed:
+	return NULL;
+}
+
+
+SQSH_EXTERN int squashfs_get_cached_block(struct super_block *s, void *buffer,
+				long long block, unsigned int offset,
+				int length, long long *next_block,
+				unsigned int *next_offset)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	int bytes, return_length = length;
+	struct squashfs_cache_entry *entry;
+
+	TRACE("Entered squashfs_get_cached_block [%llx:%x]\n", block, offset);
+
+	while (1) {
+		entry = squashfs_cache_get(s, msblk->block_cache, block, 0);
+		bytes = entry->length - offset;
+
+		if (entry->error || bytes < 1) {
+			return_length = 0;
+			goto finish;
+		} else if (bytes >= length) {
+			if (buffer)
+				memcpy(buffer, entry->data + offset, length);
+			if (entry->length - offset == length) {
+				*next_block = entry->next_index;
+				*next_offset = 0;
+			} else {
+				*next_block = block;
+				*next_offset = offset + length;
+			}
+			goto finish;
+		} else {
+			if (buffer) {
+				memcpy(buffer, entry->data + offset, bytes);
+				buffer = (char *) buffer + bytes;
+			}
+			block = entry->next_index;
+			squashfs_cache_put(msblk->block_cache, entry);
+			length -= bytes;
+			offset = 0;
+		}
+	}
+
+finish:
+	squashfs_cache_put(msblk->block_cache, entry);
+	return return_length;
+}
+
+
+static int get_fragment_location(struct super_block *s, unsigned int fragment,
+				long long *fragment_start_block,
+				unsigned int *fragment_size)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	long long start_block =
+		msblk->fragment_index[SQUASHFS_FRAGMENT_INDEX(fragment)];
+	int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET(fragment);
+	struct squashfs_fragment_entry fragment_entry;
+
+	if (msblk->swap) {
+		struct squashfs_fragment_entry sfragment_entry;
+
+		if (!squashfs_get_cached_block(s, &sfragment_entry, start_block, offset,
+					 sizeof(sfragment_entry), &start_block, &offset))
+			goto out;
+		SQUASHFS_SWAP_FRAGMENT_ENTRY(&fragment_entry, &sfragment_entry);
+	} else
+		if (!squashfs_get_cached_block(s, &fragment_entry, start_block, offset,
+					 sizeof(fragment_entry), &start_block, &offset))
+			goto out;
+
+	*fragment_start_block = fragment_entry.start_block;
+	*fragment_size = fragment_entry.size;
+
+	return 1;
+
+out:
+	return 0;
+}
+
+
+SQSH_EXTERN void release_cached_fragment(struct squashfs_sb_info *msblk,
+				struct squashfs_cache_entry *fragment)
+{
+	squashfs_cache_put(msblk->fragment_cache, fragment);
+}
+
+
+SQSH_EXTERN
+struct squashfs_cache_entry *get_cached_fragment(struct super_block *s,
+				long long start_block, int length)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+
+	return squashfs_cache_get(s, msblk->fragment_cache, start_block, length);
+}
+
+
+static void squashfs_new_inode(struct squashfs_sb_info *msblk, struct inode *i,
+				struct squashfs_base_inode_header *inodeb)
+{
+	i->i_ino = inodeb->inode_number;
+	i->i_mtime.tv_sec = inodeb->mtime;
+	i->i_atime.tv_sec = inodeb->mtime;
+	i->i_ctime.tv_sec = inodeb->mtime;
+	i->i_uid = msblk->uid[inodeb->uid];
+	i->i_mode = inodeb->mode;
+	i->i_size = 0;
+
+	if (inodeb->guid == SQUASHFS_GUIDS)
+		i->i_gid = i->i_uid;
+	else
+		i->i_gid = msblk->guid[inodeb->guid];
+}
+
+
+static squashfs_inode_t squashfs_inode_lookup(struct super_block *s, int ino)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	long long start = msblk->inode_lookup_table[SQUASHFS_LOOKUP_BLOCK(ino - 1)];
+	int offset = SQUASHFS_LOOKUP_BLOCK_OFFSET(ino - 1);
+	squashfs_inode_t inode;
+
+	TRACE("Entered squashfs_inode_lookup, inode_number = %d\n", ino);
+
+	if (msblk->swap) {
+		squashfs_inode_t sinode;
+
+		if (!squashfs_get_cached_block(s, &sinode, start, offset,
+					sizeof(sinode), &start, &offset))
+			goto out;
+		SQUASHFS_SWAP_INODE_T((&inode), &sinode);
+	} else if (!squashfs_get_cached_block(s, &inode, start, offset,
+					sizeof(inode), &start, &offset))
+			goto out;
+
+	TRACE("squashfs_inode_lookup, inode = 0x%llx\n", inode);
+
+	return inode;
+
+out:
+	return SQUASHFS_INVALID_BLK;
+}
+
+
+
+static struct dentry *squashfs_export_iget(struct super_block *s,
+	unsigned int inode_number)
+{
+	squashfs_inode_t inode;
+	struct dentry *dentry = ERR_PTR(-ENOENT);
+
+	TRACE("Entered squashfs_export_iget\n");
+
+	inode = squashfs_inode_lookup(s, inode_number);
+	if(inode != SQUASHFS_INVALID_BLK)
+		dentry = d_obtain_alias(squashfs_iget(s, inode, inode_number));
+
+	return dentry;
+}
+
+
+static struct dentry *squashfs_fh_to_dentry(struct super_block *s,
+		struct fid *fid, int fh_len, int fh_type)
+{
+	if((fh_type != FILEID_INO32_GEN && fh_type != FILEID_INO32_GEN_PARENT) ||
+			fh_len < 2)
+		return NULL;
+
+	return squashfs_export_iget(s, fid->i32.ino);
+}
+
+
+static struct dentry *squashfs_fh_to_parent(struct super_block *s,
+		struct fid *fid, int fh_len, int fh_type)
+{
+	if(fh_type != FILEID_INO32_GEN_PARENT || fh_len < 4)
+		return NULL;
+
+	return squashfs_export_iget(s, fid->i32.parent_ino);
+}
+
+
+static struct dentry *squashfs_get_parent(struct dentry *child)
+{
+	struct inode *i = child->d_inode;
+
+	TRACE("Entered squashfs_get_parent\n");
+
+	return squashfs_export_iget(i->i_sb, SQUASHFS_I(i)->u.s2.parent_inode);
+}
+
+
+SQSH_EXTERN struct inode *squashfs_iget(struct super_block *s,
+				squashfs_inode_t inode, unsigned int inode_number)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct inode *i = iget_locked(s, inode_number);
+
+	TRACE("Entered squashfs_iget\n");
+
+	if(i && (i->i_state & I_NEW)) {
+		(msblk->read_inode)(i, inode);
+		unlock_new_inode(i);
+	}
+
+	return i;
+}
+
+
+static int squashfs_read_inode(struct inode *i, squashfs_inode_t inode)
+{
+	struct super_block *s = i->i_sb;
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	long long block = SQUASHFS_INODE_BLK(inode) + sblk->inode_table_start;
+	unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
+	long long next_block;
+	unsigned int next_offset;
+	union squashfs_inode_header id, sid;
+	struct squashfs_base_inode_header *inodeb = &id.base, *sinodeb = &sid.base;
+
+	TRACE("Entered squashfs_read_inode\n");
+
+	if (msblk->swap) {
+		if (!squashfs_get_cached_block(s, 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, inodeb, block, offset,
+					sizeof(*inodeb), &next_block, &next_offset))
+			goto failed_read;
+
+	squashfs_new_inode(msblk, i, inodeb);
+
+	switch(inodeb->inode_type) {
+		case SQUASHFS_FILE_TYPE: {
+			unsigned int frag_size;
+			long long frag_blk;
+			struct squashfs_reg_inode_header *inodep = &id.reg;
+			struct squashfs_reg_inode_header *sinodep = &sid.reg;
+				
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, 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, inodep, block, offset,
+						sizeof(*inodep), &next_block, &next_offset))
+					goto failed_read;
+
+			frag_blk = SQUASHFS_INVALID_BLK;
+
+			if (inodep->fragment != SQUASHFS_INVALID_FRAG)
+					if(!get_fragment_location(s, inodep->fragment, &frag_blk,
+												&frag_size))
+						goto failed_read;
+				
+			i->i_nlink = 1;
+			i->i_size = inodep->file_size;
+			i->i_fop = &generic_ro_fops;
+			i->i_mode |= S_IFREG;
+			i->i_blocks = ((i->i_size - 1) >> 9) + 1;
+			SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
+			SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
+			SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
+			SQUASHFS_I(i)->start_block = inodep->start_block;
+			SQUASHFS_I(i)->u.s1.block_list_start = next_block;
+			SQUASHFS_I(i)->offset = next_offset;
+			i->i_data.a_ops = &squashfs_aops;
+
+			TRACE("File inode %x:%x, start_block %llx, "
+					"block_list_start %llx, offset %x\n",
+					SQUASHFS_INODE_BLK(inode), offset,
+					inodep->start_block, next_block,
+					next_offset);
+			break;
+		}
+		case SQUASHFS_LREG_TYPE: {
+			unsigned int frag_size;
+			long long frag_blk;
+			struct squashfs_lreg_inode_header *inodep = &id.lreg;
+			struct squashfs_lreg_inode_header *sinodep = &sid.lreg;
+				
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, sinodep, block, offset,
+						sizeof(*sinodep), &next_block, &next_offset))
+					goto failed_read;
+				SQUASHFS_SWAP_LREG_INODE_HEADER(inodep, sinodep);
+			} else
+				if (!squashfs_get_cached_block(s, inodep, block, offset,
+						sizeof(*inodep), &next_block, &next_offset))
+					goto failed_read;
+
+			frag_blk = SQUASHFS_INVALID_BLK;
+
+			if (inodep->fragment != SQUASHFS_INVALID_FRAG)
+				if (!get_fragment_location(s, inodep->fragment, &frag_blk,
+												 &frag_size))
+					goto failed_read;
+				
+			i->i_nlink = inodep->nlink;
+			i->i_size = inodep->file_size;
+			i->i_fop = &generic_ro_fops;
+			i->i_mode |= S_IFREG;
+			i->i_blocks = ((i->i_size - 1) >> 9) + 1;
+			SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
+			SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
+			SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
+			SQUASHFS_I(i)->start_block = inodep->start_block;
+			SQUASHFS_I(i)->u.s1.block_list_start = next_block;
+			SQUASHFS_I(i)->offset = next_offset;
+			i->i_data.a_ops = &squashfs_aops;
+
+			TRACE("File inode %x:%x, start_block %llx, "
+					"block_list_start %llx, offset %x\n",
+					SQUASHFS_INODE_BLK(inode), offset,
+					inodep->start_block, next_block,
+					next_offset);
+			break;
+		}
+		case SQUASHFS_DIR_TYPE: {
+			struct squashfs_dir_inode_header *inodep = &id.dir;
+			struct squashfs_dir_inode_header *sinodep = &sid.dir;
+
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, 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, inodep, block, offset,
+						sizeof(*inodep), &next_block, &next_offset))
+					goto failed_read;
+
+			i->i_nlink = inodep->nlink;
+			i->i_size = inodep->file_size;
+			i->i_op = &squashfs_dir_inode_ops;
+			i->i_fop = &squashfs_dir_ops;
+			i->i_mode |= S_IFDIR;
+			SQUASHFS_I(i)->start_block = inodep->start_block;
+			SQUASHFS_I(i)->offset = inodep->offset;
+			SQUASHFS_I(i)->u.s2.directory_index_count = 0;
+			SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode;
+
+			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: {
+			struct squashfs_ldir_inode_header *inodep = &id.ldir;
+			struct squashfs_ldir_inode_header *sinodep = &sid.ldir;
+
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, 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, inodep, block, offset,
+						sizeof(*inodep), &next_block, &next_offset))
+					goto failed_read;
+
+			i->i_nlink = inodep->nlink;
+			i->i_size = inodep->file_size;
+			i->i_op = &squashfs_dir_inode_ops;
+			i->i_fop = &squashfs_dir_ops;
+			i->i_mode |= S_IFDIR;
+			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;
+			SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode;
+
+			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: {
+			struct squashfs_symlink_inode_header *inodep = &id.symlink;
+			struct squashfs_symlink_inode_header *sinodep = &sid.symlink;
+	
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, 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, inodep, block, offset,
+						sizeof(*inodep), &next_block, &next_offset))
+					goto failed_read;
+
+			i->i_nlink = inodep->nlink;
+			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 %llx, offset %x\n",
+					SQUASHFS_INODE_BLK(inode), offset,
+					next_block, next_offset);
+			break;
+		 }
+		 case SQUASHFS_BLKDEV_TYPE:
+		 case SQUASHFS_CHRDEV_TYPE: {
+			struct squashfs_dev_inode_header *inodep = &id.dev;
+			struct squashfs_dev_inode_header *sinodep = &sid.dev;
+
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, 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, inodep, block, offset,
+						sizeof(*inodep), &next_block, &next_offset))
+					goto failed_read;
+
+			i->i_nlink = inodep->nlink;
+			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: {
+			struct squashfs_ipc_inode_header *inodep = &id.ipc;
+			struct squashfs_ipc_inode_header *sinodep = &sid.ipc;
+
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, 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, inodep, block, offset,
+						sizeof(*inodep), &next_block, &next_offset))
+					goto failed_read;
+
+			i->i_nlink = inodep->nlink;
+			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;
+	}
+	
+	return 1;
+
+failed_read:
+	ERROR("Unable to read inode [%llx:%x]\n", block, offset);
+
+failed_read1:
+	make_bad_inode(i);
+	return 0;
+}
+
+
+static int read_inode_lookup_table(struct super_block *s)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	unsigned int length = SQUASHFS_LOOKUP_BLOCK_BYTES(sblk->inodes);
+
+	TRACE("In read_inode_lookup_table, length %d\n", length);
+
+	/* Allocate inode lookup table */
+	msblk->inode_lookup_table = kmalloc(length, GFP_KERNEL);
+	if (msblk->inode_lookup_table == NULL) {
+		ERROR("Failed to allocate inode lookup table\n");
+		return 0;
+	}
+   
+	if (!squashfs_read_data(s, (char *) msblk->inode_lookup_table,
+			sblk->lookup_table_start, length |
+			SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length)) {
+		ERROR("unable to read inode lookup table\n");
+		return 0;
+	}
+
+	if (msblk->swap) {
+		int i;
+		long long block;
+
+		for (i = 0; i < SQUASHFS_LOOKUP_BLOCKS(sblk->inodes); i++) {
+			/* XXX */
+			SQUASHFS_SWAP_LOOKUP_BLOCKS((&block),
+						&msblk->inode_lookup_table[i], 1);
+			msblk->inode_lookup_table[i] = block;
+		}
+	}
+
+	return 1;
+}
+
+
+static int read_fragment_index_table(struct super_block *s)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	unsigned int length = SQUASHFS_FRAGMENT_INDEX_BYTES(sblk->fragments);
+
+	if(length == 0)
+		return 1;
+
+	/* Allocate fragment index table */
+	msblk->fragment_index = kmalloc(length, GFP_KERNEL);
+	if (msblk->fragment_index == NULL) {
+		ERROR("Failed to allocate fragment index table\n");
+		return 0;
+	}
+   
+	if (!squashfs_read_data(s, (char *) msblk->fragment_index,
+			sblk->fragment_table_start, length |
+			SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length)) {
+		ERROR("unable to read fragment index table\n");
+		return 0;
+	}
+
+	if (msblk->swap) {
+		int i;
+		long long fragment;
+
+		for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES(sblk->fragments); i++) {
+			/* XXX */
+			SQUASHFS_SWAP_FRAGMENT_INDEXES((&fragment),
+						&msblk->fragment_index[i], 1);
+			msblk->fragment_index[i] = fragment;
+		}
+	}
+
+	return 1;
+}
+
+
+static int supported_squashfs_filesystem(struct squashfs_sb_info *msblk, int silent)
+{
+	struct squashfs_super_block *sblk = &msblk->sblk;
+
+	msblk->read_inode = squashfs_read_inode;
+	msblk->read_blocklist = read_blocklist;
+	msblk->read_fragment_index_table = read_fragment_index_table;
+
+	if (sblk->s_major == 1) {
+		if (!squashfs_1_0_supported(msblk)) {
+			SERROR("Major/Minor mismatch, Squashfs 1.0 filesystems "
+				"are unsupported\n");
+			SERROR("Please recompile with Squashfs 1.0 support enabled\n");
+			return 0;
+		}
+	} else if (sblk->s_major == 2) {
+		if (!squashfs_2_0_supported(msblk)) {
+			SERROR("Major/Minor mismatch, Squashfs 2.0 filesystems "
+				"are unsupported\n");
+			SERROR("Please recompile with Squashfs 2.0 support enabled\n");
+			return 0;
+		}
+	} else if(sblk->s_major != SQUASHFS_MAJOR || sblk->s_minor >
+			SQUASHFS_MINOR) {
+		SERROR("Major/Minor mismatch, trying to mount newer %d.%d "
+				"filesystem\n", sblk->s_major, sblk->s_minor);
+		SERROR("Please update your kernel\n");
+		return 0;
+	}
+
+	return 1;
+}
+
+
+static int squashfs_fill_super(struct super_block *s, void *data, int silent)
+{
+	struct squashfs_sb_info *msblk;
+	struct squashfs_super_block *sblk;
+	char b[BDEVNAME_SIZE];
+	struct inode *root;
+
+	TRACE("Entered squashfs_fill_superblock\n");
+
+	s->s_fs_info = kzalloc(sizeof(struct squashfs_sb_info), GFP_KERNEL);
+	if (s->s_fs_info == NULL) {
+		ERROR("Failed to allocate superblock\n");
+		goto failure;
+	}
+	msblk = s->s_fs_info;
+
+	msblk->stream.workspace = vmalloc(zlib_inflate_workspacesize());
+	if (msblk->stream.workspace == NULL) {
+		ERROR("Failed to allocate zlib workspace\n");
+		goto failure;
+	}
+	sblk = &msblk->sblk;
+	
+	msblk->devblksize = sb_min_blocksize(s, BLOCK_SIZE);
+	msblk->devblksize_log2 = ffz(~msblk->devblksize);
+
+	mutex_init(&msblk->read_data_mutex);
+	mutex_init(&msblk->read_page_mutex);
+	mutex_init(&msblk->meta_index_mutex);
+	
+	/* sblk->bytes_used is checked in squashfs_read_data to ensure reads are not
+ 	 * beyond filesystem end.  As we're using squashfs_read_data to read sblk here,
+ 	 * first set sblk->bytes_used to a useful value */
+	sblk->bytes_used = sizeof(struct squashfs_super_block);
+	if (!squashfs_read_data(s, (char *) sblk, SQUASHFS_START,
+					sizeof(struct squashfs_super_block) |
+					SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, sizeof(struct squashfs_super_block))) {
+		SERROR("unable to read superblock\n");
+		goto failed_mount;
+	}
+
+	/* Check it is a SQUASHFS superblock */
+	if ((s->s_magic = sblk->s_magic) != SQUASHFS_MAGIC) {
+		if (sblk->s_magic == SQUASHFS_MAGIC_SWAP) {
+			struct squashfs_super_block ssblk;
+
+			WARNING("Mounting a different endian SQUASHFS filesystem on %s\n",
+				bdevname(s->s_bdev, b));
+
+			SQUASHFS_SWAP_SUPER_BLOCK(&ssblk, sblk);
+			memcpy(sblk, &ssblk, sizeof(struct 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 */
+	if(!supported_squashfs_filesystem(msblk, silent))
+		goto failed_mount;
+
+	/* Check the filesystem does not extend beyond the end of the
+	   block device */
+	if(sblk->bytes_used < 0 || sblk->bytes_used > i_size_read(s->s_bdev->bd_inode))
+		goto failed_mount;
+
+	/* Check the root inode for sanity */
+	if (SQUASHFS_INODE_OFFSET(sblk->root_inode) > SQUASHFS_METADATA_SIZE)
+		goto failed_mount;
+
+	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 %spresent in the filesystem\n",
+					SQUASHFS_CHECK_DATA(sblk->flags) ?  "" : "not ");
+	TRACE("Filesystem size %lld 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 %llx\n", sblk->inode_table_start);
+	TRACE("sblk->directory_table_start %llx\n", sblk->directory_table_start);
+	if (sblk->s_major > 1)
+		TRACE("sblk->fragment_table_start %llx\n", sblk->fragment_table_start);
+	TRACE("sblk->uid_start %llx\n", sblk->uid_start);
+
+	s->s_maxbytes = MAX_LFS_FILESIZE;
+	s->s_flags |= MS_RDONLY;
+	s->s_op = &squashfs_super_ops;
+
+	msblk->block_cache = squashfs_cache_init("metadata", SQUASHFS_CACHED_BLKS,
+		SQUASHFS_METADATA_SIZE, 0);
+	if (msblk->block_cache == NULL)
+		goto failed_mount;
+
+	/* Allocate read_page block */
+	msblk->read_page = vmalloc(sblk->block_size);
+	if (msblk->read_page == NULL) {
+		ERROR("Failed to allocate read_page block\n");
+		goto failed_mount;
+	}
+
+	/* Allocate uid and gid tables */
+	msblk->uid = kmalloc((sblk->no_uids + sblk->no_guids) *
+					sizeof(unsigned int), GFP_KERNEL);
+	if (msblk->uid == NULL) {
+		ERROR("Failed to allocate uid/gid table\n");
+		goto failed_mount;
+	}
+	msblk->guid = msblk->uid + sblk->no_uids;
+   
+	if (msblk->swap) {
+		unsigned int suid[sblk->no_uids + sblk->no_guids];
+
+		if (!squashfs_read_data(s, (char *) &suid, sblk->uid_start,
+					((sblk->no_uids + sblk->no_guids) *
+					 sizeof(unsigned int)) |
+					SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, (sblk->no_uids + sblk->no_guids) * sizeof(unsigned int))) {
+			ERROR("unable to read uid/gid table\n");
+			goto failed_mount;
+		}
+
+		SQUASHFS_SWAP_DATA(msblk->uid, suid, (sblk->no_uids +
+			sblk->no_guids), (sizeof(unsigned int) * 8));
+	} else
+		if (!squashfs_read_data(s, (char *) msblk->uid, sblk->uid_start,
+					((sblk->no_uids + sblk->no_guids) *
+					 sizeof(unsigned int)) |
+					SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, (sblk->no_uids + sblk->no_guids) * sizeof(unsigned int))) {
+			ERROR("unable to read uid/gid table\n");
+			goto failed_mount;
+		}
+
+
+	if (sblk->s_major == 1 && squashfs_1_0_supported(msblk))
+		goto allocate_root;
+
+	msblk->fragment_cache = squashfs_cache_init("fragment",
+		SQUASHFS_CACHED_FRAGMENTS, sblk->block_size, 1);
+	if (msblk->fragment_cache == NULL)
+		goto failed_mount;
+
+	/* Allocate and read fragment index table */
+	if (msblk->read_fragment_index_table(s) == 0)
+		goto failed_mount;
+
+	if(sblk->s_major < 3 || sblk->lookup_table_start == SQUASHFS_INVALID_BLK)
+		goto allocate_root;
+
+	/* Allocate and read inode lookup table */
+	if (read_inode_lookup_table(s) == 0)
+		goto failed_mount;
+
+	s->s_export_op = &squashfs_export_ops;
+
+allocate_root:
+	root = new_inode(s);
+	if ((msblk->read_inode)(root, sblk->root_inode) == 0)
+		goto failed_mount;
+	insert_inode_hash(root);
+
+	s->s_root = d_alloc_root(root);
+	if (s->s_root == NULL) {
+		ERROR("Root inode create failed\n");
+		iput(root);
+		goto failed_mount;
+	}
+
+	TRACE("Leaving squashfs_fill_super\n");
+	return 0;
+
+failed_mount:
+	kfree(msblk->inode_lookup_table);
+	kfree(msblk->fragment_index);
+	squashfs_cache_delete(msblk->fragment_cache);
+	kfree(msblk->uid);
+	vfree(msblk->read_page);
+	squashfs_cache_delete(msblk->block_cache);
+	kfree(msblk->fragment_index_2);
+	vfree(msblk->stream.workspace);
+	kfree(s->s_fs_info);
+	s->s_fs_info = NULL;
+	return -EINVAL;
+
+failure:
+	return -ENOMEM;
+}
+
+
+static int squashfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+	struct squashfs_sb_info *msblk = dentry->d_sb->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->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, avail_bytes;
+	long long block = SQUASHFS_I(inode)->start_block;
+	int offset = SQUASHFS_I(inode)->offset;
+	void *pageaddr = kmap(page);
+
+	TRACE("Entered squashfs_symlink_readpage, page index %ld, start block "
+				"%llx, offset %x\n", page->index,
+				SQUASHFS_I(inode)->start_block,
+				SQUASHFS_I(inode)->offset);
+
+	for (length = 0; length < index; length += bytes) {
+		bytes = squashfs_get_cached_block(inode->i_sb, NULL, block,
+				offset, PAGE_CACHE_SIZE, &block, &offset);
+		if (bytes == 0) {
+			ERROR("Unable to read symbolic link [%llx:%x]\n", block, offset);
+			goto skip_read;
+		}
+	}
+
+	if (length != index) {
+		ERROR("(squashfs_symlink_readpage) length != index\n");
+		bytes = 0;
+		goto skip_read;
+	}
+
+	avail_bytes = min_t(int, i_size_read(inode) - length, PAGE_CACHE_SIZE);
+
+	bytes = squashfs_get_cached_block(inode->i_sb, pageaddr, block, offset,
+		avail_bytes, &block, &offset);
+	if (bytes == 0)
+		ERROR("Unable to read symbolic link [%llx:%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;
+}
+
+
+static struct meta_index *locate_meta_index(struct inode *inode, int index, int offset)
+{
+	struct meta_index *meta = NULL;
+	struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
+	int i;
+
+	mutex_lock(&msblk->meta_index_mutex);
+
+	TRACE("locate_meta_index: index %d, offset %d\n", index, offset);
+
+	if (msblk->meta_index == NULL)
+		goto not_allocated;
+
+	for (i = 0; i < SQUASHFS_META_NUMBER; i ++) {
+		if (msblk->meta_index[i].inode_number == inode->i_ino &&
+				msblk->meta_index[i].offset >= offset &&
+				msblk->meta_index[i].offset <= index &&
+				msblk->meta_index[i].locked == 0) {
+			TRACE("locate_meta_index: entry %d, offset %d\n", i,
+					msblk->meta_index[i].offset);
+			meta = &msblk->meta_index[i];
+			offset = meta->offset;
+		}
+	}
+
+	if (meta)
+		meta->locked = 1;
+
+not_allocated:
+	mutex_unlock(&msblk->meta_index_mutex);
+
+	return meta;
+}
+
+
+static struct meta_index *empty_meta_index(struct inode *inode, int offset, int skip)
+{
+	struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
+	struct meta_index *meta = NULL;
+	int i;
+
+	mutex_lock(&msblk->meta_index_mutex);
+
+	TRACE("empty_meta_index: offset %d, skip %d\n", offset, skip);
+
+	if (msblk->meta_index == NULL) {
+		msblk->meta_index = kmalloc(sizeof(struct meta_index) *
+					SQUASHFS_META_NUMBER, GFP_KERNEL);
+		if (msblk->meta_index == NULL) {
+			ERROR("Failed to allocate meta_index\n");
+			goto failed;
+		}
+		for (i = 0; i < SQUASHFS_META_NUMBER; i++) {
+			msblk->meta_index[i].inode_number = 0;
+			msblk->meta_index[i].locked = 0;
+		}
+		msblk->next_meta_index = 0;
+	}
+
+	for (i = SQUASHFS_META_NUMBER; i &&
+			msblk->meta_index[msblk->next_meta_index].locked; i --)
+		msblk->next_meta_index = (msblk->next_meta_index + 1) %
+			SQUASHFS_META_NUMBER;
+
+	if (i == 0) {
+		TRACE("empty_meta_index: failed!\n");
+		goto failed;
+	}
+
+	TRACE("empty_meta_index: returned meta entry %d, %p\n",
+			msblk->next_meta_index,
+			&msblk->meta_index[msblk->next_meta_index]);
+
+	meta = &msblk->meta_index[msblk->next_meta_index];
+	msblk->next_meta_index = (msblk->next_meta_index + 1) %
+			SQUASHFS_META_NUMBER;
+
+	meta->inode_number = inode->i_ino;
+	meta->offset = offset;
+	meta->skip = skip;
+	meta->entries = 0;
+	meta->locked = 1;
+
+failed:
+	mutex_unlock(&msblk->meta_index_mutex);
+	return meta;
+}
+
+
+static void release_meta_index(struct inode *inode, struct meta_index *meta)
+{
+	meta->locked = 0;
+	smp_mb();
+}
+
+
+static int read_block_index(struct super_block *s, int blocks, char *block_list,
+				long long *start_block, int *offset)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	unsigned int *block_listp;
+	int block = 0;
+	
+	if (msblk->swap) {
+		char sblock_list[blocks << 2];
+
+		if (!squashfs_get_cached_block(s, sblock_list, *start_block,
+				*offset, blocks << 2, start_block, offset)) {
+			ERROR("Fail reading block list [%llx:%x]\n", *start_block, *offset);
+			goto failure;
+		}
+		SQUASHFS_SWAP_INTS(((unsigned int *)block_list),
+				((unsigned int *)sblock_list), blocks);
+	} else {
+		if (!squashfs_get_cached_block(s, block_list, *start_block,
+				*offset, blocks << 2, start_block, offset)) {
+			ERROR("Fail reading block list [%llx:%x]\n", *start_block, *offset);
+			goto failure;
+		}
+	}
+
+	for (block_listp = (unsigned int *) block_list; blocks;
+				block_listp++, blocks --)
+		block += SQUASHFS_COMPRESSED_SIZE_BLOCK(*block_listp);
+
+	return block;
+
+failure:
+	return -1;
+}
+
+
+#define SIZE 256
+
+static inline int calculate_skip(int blocks) {
+	int skip = (blocks - 1) / ((SQUASHFS_SLOTS * SQUASHFS_META_ENTRIES + 1) * SQUASHFS_META_INDEXES);
+	return skip >= 7 ? 7 : skip + 1;
+}
+
+
+static int get_meta_index(struct inode *inode, int index,
+		long long *index_block, int *index_offset,
+		long long *data_block, char *block_list)
+{
+	struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	int skip = calculate_skip(i_size_read(inode) >> sblk->block_log);
+	int offset = 0;
+	struct meta_index *meta;
+	struct meta_entry *meta_entry;
+	long long cur_index_block = SQUASHFS_I(inode)->u.s1.block_list_start;
+	int cur_offset = SQUASHFS_I(inode)->offset;
+	long long cur_data_block = SQUASHFS_I(inode)->start_block;
+	int i;
+ 
+	index /= SQUASHFS_META_INDEXES * skip;
+
+	while (offset < index) {
+		meta = locate_meta_index(inode, index, offset + 1);
+
+		if (meta == NULL) {
+			meta = empty_meta_index(inode, offset + 1, skip);
+			if (meta == NULL)
+				goto all_done;
+		} else {
+			if(meta->entries == 0)
+				goto failed;
+			/* XXX */
+			offset = index < meta->offset + meta->entries ? index :
+				meta->offset + meta->entries - 1;
+			/* XXX */
+			meta_entry = &meta->meta_entry[offset - meta->offset];
+			cur_index_block = meta_entry->index_block + sblk->inode_table_start;
+			cur_offset = meta_entry->offset;
+			cur_data_block = meta_entry->data_block;
+			TRACE("get_meta_index: offset %d, meta->offset %d, "
+				"meta->entries %d\n", offset, meta->offset, meta->entries);
+			TRACE("get_meta_index: index_block 0x%llx, offset 0x%x"
+				" data_block 0x%llx\n", cur_index_block,
+				cur_offset, cur_data_block);
+		}
+
+		for (i = meta->offset + meta->entries; i <= index &&
+				i < meta->offset + SQUASHFS_META_ENTRIES; i++) {
+			int blocks = skip * SQUASHFS_META_INDEXES;
+
+			while (blocks) {
+				int block = blocks > (SIZE >> 2) ? (SIZE >> 2) : blocks;
+				int res = read_block_index(inode->i_sb, block, block_list,
+					&cur_index_block, &cur_offset);
+
+				if (res == -1)
+					goto failed;
+
+				cur_data_block += res;
+				blocks -= block;
+			}
+
+			meta_entry = &meta->meta_entry[i - meta->offset];
+			meta_entry->index_block = cur_index_block - sblk->inode_table_start;
+			meta_entry->offset = cur_offset;
+			meta_entry->data_block = cur_data_block;
+			meta->entries ++;
+			offset ++;
+		}
+
+		TRACE("get_meta_index: meta->offset %d, meta->entries %d\n",
+				meta->offset, meta->entries);
+
+		release_meta_index(inode, meta);
+	}
+
+all_done:
+	*index_block = cur_index_block;
+	*index_offset = cur_offset;
+	*data_block = cur_data_block;
+
+	return offset * SQUASHFS_META_INDEXES * skip;
+
+failed:
+	release_meta_index(inode, meta);
+	return -1;
+}
+
+
+static long long read_blocklist(struct inode *inode, int index,
+				int readahead_blks, char *block_list,
+				unsigned short **block_p, unsigned int *bsize)
+{
+	long long block_ptr;
+	int offset;
+	long long block;
+	int res = get_meta_index(inode, index, &block_ptr, &offset, &block,
+		block_list);
+
+	TRACE("read_blocklist: res %d, index %d, block_ptr 0x%llx, offset"
+		       " 0x%x, block 0x%llx\n", res, index, block_ptr, offset, block);
+
+	if(res == -1)
+		goto failure;
+
+	index -= res;
+
+	while (index) {
+		int blocks = index > (SIZE >> 2) ? (SIZE >> 2) : index;
+		int res = read_block_index(inode->i_sb, blocks, block_list,
+			&block_ptr, &offset);
+		if (res == -1)
+			goto failure;
+		block += res;
+		index -= blocks;
+	}
+
+	if (read_block_index(inode->i_sb, 1, block_list, &block_ptr, &offset) == -1)
+		goto failure;
+	*bsize = *((unsigned int *) block_list);
+
+	return block;
+
+failure:
+	return 0;
+}
+
+
+static int squashfs_readpage(struct file *file, struct page *page)
+{
+	struct inode *inode = page->mapping->host;
+	struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	unsigned char *block_list = NULL;
+	long long block;
+	unsigned int bsize, i;
+	int bytes;
+	int index = page->index >> (sblk->block_log - PAGE_CACHE_SHIFT);
+ 	void *pageaddr;
+	struct squashfs_cache_entry *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;
+	int file_end = i_size_read(inode) >> sblk->block_log;
+	int sparse = 0;
+
+	TRACE("Entered squashfs_readpage, page index %lx, start block %llx\n",
+					page->index, SQUASHFS_I(inode)->start_block);
+
+	if (page->index >= ((i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
+					PAGE_CACHE_SHIFT))
+		goto out;
+
+	if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
+					|| index < file_end) {
+		block_list = kmalloc(SIZE, GFP_KERNEL);
+		if (block_list == NULL) {
+			ERROR("Failed to allocate block_list\n");
+			goto error_out;
+		}
+
+		block = (msblk->read_blocklist)(inode, index, 1, block_list, NULL, &bsize);
+		if (block == 0)
+			goto error_out;
+
+		if (bsize == 0) { /* hole */
+			bytes = index == file_end ?
+				(i_size_read(inode) & (sblk->block_size - 1)) : sblk->block_size;
+			sparse = 1;
+		} else {
+			mutex_lock(&msblk->read_page_mutex);
+		
+			bytes = squashfs_read_data(inode->i_sb, msblk->read_page, block,
+				bsize, NULL, sblk->block_size);
+
+			if (bytes == 0) {
+				ERROR("Unable to read page, block %llx, size %x\n", block, bsize);
+				mutex_unlock(&msblk->read_page_mutex);
+				goto error_out;
+			}
+		}
+	} else {
+		fragment = get_cached_fragment(inode->i_sb,
+					SQUASHFS_I(inode)-> u.s1.fragment_start_block,
+					SQUASHFS_I(inode)->u.s1.fragment_size);
+
+		if (fragment->error) {
+			ERROR("Unable to read page, block %llx, size %x\n",
+					SQUASHFS_I(inode)->u.s1.fragment_start_block,
+					(int) SQUASHFS_I(inode)->u.s1.fragment_size);
+			release_cached_fragment(msblk, fragment);
+			goto error_out;
+		}
+		bytes = i_size_read(inode) & (sblk->block_size - 1);
+		data_ptr = fragment->data + SQUASHFS_I(inode)->u.s1.fragment_offset;
+	}
+
+	for (i = start_index; i <= end_index && bytes > 0; i++,
+						bytes -= PAGE_CACHE_SIZE, data_ptr += PAGE_CACHE_SIZE) {
+		struct page *push_page;
+		int avail = sparse ? 0 : min_t(unsigned int, bytes, PAGE_CACHE_SIZE);
+
+		TRACE("bytes %d, i %d, available_bytes %d\n", bytes, i, avail);
+
+		push_page = (i == page->index) ? page :
+			grab_cache_page_nowait(page->mapping, i);
+
+		if (!push_page)
+			continue;
+
+		if (PageUptodate(push_page))
+			goto skip_page;
+
+ 		pageaddr = kmap_atomic(push_page, KM_USER0);
+		memcpy(pageaddr, data_ptr, avail);
+		memset(pageaddr + avail, 0, PAGE_CACHE_SIZE - avail);
+		kunmap_atomic(pageaddr, KM_USER0);
+		flush_dcache_page(push_page);
+		SetPageUptodate(push_page);
+skip_page:
+		unlock_page(push_page);
+		if(i != page->index)
+			page_cache_release(push_page);
+	}
+
+	if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
+					|| index < file_end) {
+		if (!sparse)
+			mutex_unlock(&msblk->read_page_mutex);
+		kfree(block_list);
+	} else
+		release_cached_fragment(msblk, fragment);
+
+	return 0;
+
+error_out:
+	SetPageError(page);
+out:
+	pageaddr = kmap_atomic(page, KM_USER0);
+	memset(pageaddr, 0, PAGE_CACHE_SIZE);
+	kunmap_atomic(pageaddr, KM_USER0);
+	flush_dcache_page(page);
+	if (!PageError(page))
+		SetPageUptodate(page);
+	unlock_page(page);
+
+	kfree(block_list);
+	return 0;
+}
+
+
+static int get_dir_index_using_offset(struct super_block *s,
+				long long *next_block, unsigned int *next_offset,
+				long long index_start, unsigned int index_offset, int i_count,
+				long long f_pos)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	int i, length = 0;
+	struct squashfs_dir_index index;
+
+	TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n",
+					i_count, (unsigned int) f_pos);
+
+	f_pos -= 3;
+	if (f_pos == 0)
+		goto finish;
+
+	for (i = 0; i < i_count; i++) {
+		if (msblk->swap) {
+			struct squashfs_dir_index sindex;
+			squashfs_get_cached_block(s, &sindex, index_start, index_offset,
+					sizeof(sindex), &index_start, &index_offset);
+			SQUASHFS_SWAP_DIR_INDEX(&index, &sindex);
+		} else
+			squashfs_get_cached_block(s, &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;
+
+finish:
+	return length + 3;
+}
+
+
+static int get_dir_index_using_name(struct super_block *s,
+				long long *next_block, unsigned int *next_offset,
+				long long index_start, unsigned int index_offset, int i_count,
+				const char *name, int size)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	int i, length = 0;
+	struct squashfs_dir_index *index;
+	char *str;
+
+	TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
+
+	str = kmalloc(sizeof(struct squashfs_dir_index) +
+		(SQUASHFS_NAME_LEN + 1) * 2, GFP_KERNEL);
+	if (str == NULL) {
+		ERROR("Failed to allocate squashfs_dir_index\n");
+		goto failure;
+	}
+
+	index = (struct squashfs_dir_index *) (str + SQUASHFS_NAME_LEN + 1);
+	strncpy(str, name, size);
+	str[size] = '\0';
+
+	for (i = 0; i < i_count; i++) {
+		if (msblk->swap) {
+			struct squashfs_dir_index sindex;
+			squashfs_get_cached_block(s, &sindex, index_start, index_offset,
+				sizeof(sindex), &index_start, &index_offset);
+			SQUASHFS_SWAP_DIR_INDEX(index, &sindex);
+		} else
+			squashfs_get_cached_block(s, index, index_start, index_offset,
+				sizeof(struct 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;
+	kfree(str);
+
+failure:
+	return length + 3;
+}
+
+		
+static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir)
+{
+	struct inode *i = file->f_dentry->d_inode;
+	struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	long long next_block = SQUASHFS_I(i)->start_block +
+		sblk->directory_table_start;
+	int next_offset = SQUASHFS_I(i)->offset, length = 0, dir_count;
+	struct squashfs_dir_header dirh;
+	struct squashfs_dir_entry *dire;
+
+	TRACE("Entered squashfs_readdir [%llx:%x]\n", next_block, next_offset);
+
+	dire = kmalloc(sizeof(struct squashfs_dir_entry) +
+		SQUASHFS_NAME_LEN + 1, GFP_KERNEL);
+	if (dire == NULL) {
+		ERROR("Failed to allocate squashfs_dir_entry\n");
+		goto finish;
+	}
+
+	while(file->f_pos < 3) {
+		char *name;
+		int size, i_ino;
+
+		if(file->f_pos == 0) {
+			name = ".";
+			size = 1;
+			i_ino = i->i_ino;
+		} else {
+			name = "..";
+			size = 2;
+			i_ino = SQUASHFS_I(i)->u.s2.parent_inode;
+		}
+		TRACE("Calling filldir(%x, %s, %d, %d, %d, %d)\n",
+				(unsigned int) dirent, name, size, (int)
+				file->f_pos, i_ino, squashfs_filetype_table[1]);
+
+		if (filldir(dirent, name, size, file->f_pos, i_ino,
+				squashfs_filetype_table[1]) < 0) {
+				TRACE("Filldir returned less than 0\n");
+			goto finish;
+		}
+		file->f_pos += size;
+	}
+
+	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_size_read(i)) {
+		/* read directory header */
+		if (msblk->swap) {
+			struct squashfs_dir_header sdirh;
+			
+			if (!squashfs_get_cached_block(i->i_sb, &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, &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) {
+				struct squashfs_dir_entry sdire;
+				if (!squashfs_get_cached_block(i->i_sb, &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, 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, %d)\n",
+					(unsigned int) dirent, dire->name, dire->size + 1,
+					(int) file->f_pos, dirh.start_block, dire->offset,
+					dirh.inode_number + dire->inode_number,
+					squashfs_filetype_table[dire->type]);
+
+			if (filldir(dirent, dire->name, dire->size + 1, file->f_pos,
+					dirh.inode_number + dire->inode_number,
+					squashfs_filetype_table[dire->type]) < 0) {
+				TRACE("Filldir returned less than 0\n");
+				goto finish;
+			}
+			file->f_pos = length;
+		}
+	}
+
+finish:
+	kfree(dire);
+	return 0;
+
+failed_read:
+	ERROR("Unable to read directory block [%llx:%x]\n", next_block,
+		next_offset);
+	kfree(dire);
+	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;
+	struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	long long next_block = SQUASHFS_I(i)->start_block +
+				sblk->directory_table_start;
+	int next_offset = SQUASHFS_I(i)->offset, length = 0, dir_count;
+	struct squashfs_dir_header dirh;
+	struct squashfs_dir_entry *dire;
+
+	TRACE("Entered squashfs_lookup [%llx:%x]\n", next_block, next_offset);
+
+	dire = kmalloc(sizeof(struct squashfs_dir_entry) +
+		SQUASHFS_NAME_LEN + 1, GFP_KERNEL);
+	if (dire == NULL) {
+		ERROR("Failed to allocate squashfs_dir_entry\n");
+		goto exit_lookup;
+	}
+
+	if (len > SQUASHFS_NAME_LEN)
+		goto exit_lookup;
+
+	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_size_read(i)) {
+		/* read directory header */
+		if (msblk->swap) {
+			struct squashfs_dir_header sdirh;
+			if (!squashfs_get_cached_block(i->i_sb, &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, &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) {
+				struct squashfs_dir_entry sdire;
+				if (!squashfs_get_cached_block(i->i_sb, &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, 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 (name[0] < dire->name[0])
+				goto exit_lookup;
+
+			if ((len == dire->size + 1) && !strncmp(name, dire->name, len)) {
+				squashfs_inode_t ino = SQUASHFS_MKINODE(dirh.start_block,
+								dire->offset);
+
+				TRACE("calling squashfs_iget for directory entry %s, inode"
+					"  %x:%x, %d\n", name, dirh.start_block, dire->offset,
+					dirh.inode_number + dire->inode_number);
+
+				inode = squashfs_iget(i->i_sb, ino, dirh.inode_number + dire->inode_number);
+
+				goto exit_lookup;
+			}
+		}
+	}
+
+exit_lookup:
+	kfree(dire);
+	if (inode)
+		return d_splice_alias(inode, dentry);
+	d_add(dentry, inode);
+	return ERR_PTR(0);
+
+failed_read:
+	ERROR("Unable to read directory block [%llx:%x]\n", next_block,
+		next_offset);
+	goto exit_lookup;
+}
+
+
+static int squashfs_remount(struct super_block *s, int *flags, char *data)
+{
+	*flags |= MS_RDONLY;
+	return 0;
+}
+
+
+static void squashfs_put_super(struct super_block *s)
+{
+	if (s->s_fs_info) {
+		struct squashfs_sb_info *sbi = s->s_fs_info;
+		squashfs_cache_delete(sbi->block_cache);
+		squashfs_cache_delete(sbi->fragment_cache);
+		vfree(sbi->read_page);
+		kfree(sbi->uid);
+		kfree(sbi->fragment_index);
+		kfree(sbi->fragment_index_2);
+		kfree(sbi->meta_index);
+		vfree(sbi->stream.workspace);
+		kfree(s->s_fs_info);
+		s->s_fs_info = NULL;
+	}
+}
+
+
+static int squashfs_get_sb(struct file_system_type *fs_type, int flags,
+				const char *dev_name, void *data, struct vfsmount *mnt)
+{
+	return get_sb_bdev(fs_type, flags, dev_name, data, squashfs_fill_super,
+				mnt);
+}
+
+
+static int __init init_squashfs_fs(void)
+{
+	int err = init_inodecache();
+	if (err)
+		goto out;
+
+	printk(KERN_INFO "squashfs: version 3.4 (2008/08/26) "
+		"Phillip Lougher\n");
+
+	err = register_filesystem(&squashfs_fs_type);
+	if (err)
+		destroy_inodecache();
+
+out:
+	return err;
+}
+
+
+static void __exit exit_squashfs_fs(void)
+{
+	unregister_filesystem(&squashfs_fs_type);
+	destroy_inodecache();
+}
+
+
+static struct kmem_cache * squashfs_inode_cachep;
+
+
+static struct inode *squashfs_alloc_inode(struct super_block *sb)
+{
+	struct squashfs_inode_info *ei;
+	ei = kmem_cache_alloc(squashfs_inode_cachep, GFP_KERNEL);
+	return ei ? &ei->vfs_inode : NULL;
+}
+
+
+static void squashfs_destroy_inode(struct inode *inode)
+{
+	kmem_cache_free(squashfs_inode_cachep, SQUASHFS_I(inode));
+}
+
+
+static void init_once(void *foo)
+{
+	struct squashfs_inode_info *ei = foo;
+
+	inode_init_once(&ei->vfs_inode);
+}
+ 
+
+static int __init 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);
+	if (squashfs_inode_cachep == NULL)
+		return -ENOMEM;
+	return 0;
+}
+
+
+static void destroy_inodecache(void)
+{
+	kmem_cache_destroy(squashfs_inode_cachep);
+}
+
+
+module_init(init_squashfs_fs);
+module_exit(exit_squashfs_fs);
+MODULE_DESCRIPTION("squashfs 3.4, a compressed read-only filesystem");
+MODULE_AUTHOR("Phillip Lougher <phillip@lougher.demon.co.uk>");
+MODULE_LICENSE("GPL");
diff -Naur linux-2.6.28/fs/squashfs/Makefile linux-2.6.28-magellan/fs/squashfs/Makefile
--- linux-2.6.28/fs/squashfs/Makefile	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.28-magellan/fs/squashfs/Makefile	2009-01-25 11:13:12.000000000 +0100
@@ -0,0 +1,7 @@
+#
+# Makefile for the linux squashfs routines.
+#
+
+obj-$(CONFIG_SQUASHFS) += squashfs.o
+squashfs-y += inode.o
+squashfs-y += squashfs2_0.o
diff -Naur linux-2.6.28/fs/squashfs/squashfs2_0.c linux-2.6.28-magellan/fs/squashfs/squashfs2_0.c
--- linux-2.6.28/fs/squashfs/squashfs2_0.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.28-magellan/fs/squashfs/squashfs2_0.c	2009-01-25 11:13:12.000000000 +0100
@@ -0,0 +1,740 @@
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ * 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.
+ *
+ * squashfs2_0.c
+ */
+
+#include <linux/squashfs_fs.h>
+#include <linux/module.h>
+#include <linux/zlib.h>
+#include <linux/fs.h>
+#include <linux/squashfs_fs_sb.h>
+#include <linux/squashfs_fs_i.h>
+
+#include "squashfs.h"
+static int squashfs_readdir_2(struct file *file, void *dirent, filldir_t filldir);
+static struct dentry *squashfs_lookup_2(struct inode *, struct dentry *,
+				struct nameidata *);
+
+static struct file_operations squashfs_dir_ops_2 = {
+	.read = generic_read_dir,
+	.readdir = squashfs_readdir_2
+};
+
+static struct inode_operations squashfs_dir_inode_ops_2 = {
+	.lookup = squashfs_lookup_2
+};
+
+static unsigned char squashfs_filetype_table[] = {
+	DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
+};
+
+static int read_fragment_index_table_2(struct super_block *s)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+
+	if (!(msblk->fragment_index_2 = kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES_2
+					(sblk->fragments), GFP_KERNEL))) {
+		ERROR("Failed to allocate uid/gid table\n");
+		return 0;
+	}
+   
+	if (SQUASHFS_FRAGMENT_INDEX_BYTES_2(sblk->fragments) &&
+					!squashfs_read_data(s, (char *)
+					msblk->fragment_index_2,
+					sblk->fragment_table_start,
+					SQUASHFS_FRAGMENT_INDEX_BYTES_2
+					(sblk->fragments) |
+					SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, SQUASHFS_FRAGMENT_INDEX_BYTES_2(sblk->fragments))) {
+		ERROR("unable to read fragment index table\n");
+		return 0;
+	}
+
+	if (msblk->swap) {
+		int i;
+		unsigned int fragment;
+
+		for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES_2(sblk->fragments);
+									i++) {
+			SQUASHFS_SWAP_FRAGMENT_INDEXES_2((&fragment),
+						&msblk->fragment_index_2[i], 1);
+			msblk->fragment_index_2[i] = fragment;
+		}
+	}
+
+	return 1;
+}
+
+
+static int get_fragment_location_2(struct super_block *s, unsigned int fragment,
+				long long *fragment_start_block,
+				unsigned int *fragment_size)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	long long start_block =
+		msblk->fragment_index_2[SQUASHFS_FRAGMENT_INDEX_2(fragment)];
+	int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET_2(fragment);
+	struct squashfs_fragment_entry_2 fragment_entry;
+
+	if (msblk->swap) {
+		struct squashfs_fragment_entry_2 sfragment_entry;
+
+		if (!squashfs_get_cached_block(s, (char *) &sfragment_entry,
+					start_block, offset,
+					sizeof(sfragment_entry), &start_block,
+					&offset))
+			goto out;
+		SQUASHFS_SWAP_FRAGMENT_ENTRY_2(&fragment_entry, &sfragment_entry);
+	} else
+		if (!squashfs_get_cached_block(s, (char *) &fragment_entry,
+					start_block, offset,
+					sizeof(fragment_entry), &start_block,
+					&offset))
+			goto out;
+
+	*fragment_start_block = fragment_entry.start_block;
+	*fragment_size = fragment_entry.size;
+
+	return 1;
+
+out:
+	return 0;
+}
+
+
+static void squashfs_new_inode(struct squashfs_sb_info *msblk, struct inode *i,
+		struct squashfs_base_inode_header_2 *inodeb, unsigned int ino)
+{
+	struct squashfs_super_block *sblk = &msblk->sblk;
+
+	i->i_ino = ino;
+	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_mode = inodeb->mode;
+	i->i_nlink = 1;
+	i->i_size = 0;
+	if (inodeb->guid == SQUASHFS_GUIDS)
+		i->i_gid = i->i_uid;
+	else
+		i->i_gid = msblk->guid[inodeb->guid];
+}
+
+
+static int squashfs_read_inode_2(struct inode *i, squashfs_inode_t inode)
+{
+	struct super_block *s = i->i_sb;
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct 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 ino = SQUASHFS_MK_VFS_INODE(block -
+		sblk->inode_table_start, offset);
+	long long next_block;
+	unsigned int next_offset;
+	union squashfs_inode_header_2 id, sid;
+	struct squashfs_base_inode_header_2 *inodeb = &id.base,
+					  *sinodeb = &sid.base;
+
+	TRACE("Entered squashfs_read_inode_2\n");
+
+	if (msblk->swap) {
+		if (!squashfs_get_cached_block(s, (char *) sinodeb, block,
+					offset, sizeof(*sinodeb), &next_block,
+					&next_offset))
+			goto failed_read;
+		SQUASHFS_SWAP_BASE_INODE_HEADER_2(inodeb, sinodeb,
+					sizeof(*sinodeb));
+	} else
+		if (!squashfs_get_cached_block(s, (char *) inodeb, block,
+					offset, sizeof(*inodeb), &next_block,
+					&next_offset))
+			goto failed_read;
+
+	squashfs_new_inode(msblk, i, inodeb, ino);
+
+	switch(inodeb->inode_type) {
+		case SQUASHFS_FILE_TYPE: {
+			struct squashfs_reg_inode_header_2 *inodep = &id.reg;
+			struct squashfs_reg_inode_header_2 *sinodep = &sid.reg;
+			long long frag_blk;
+			unsigned int frag_size = 0;
+				
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, (char *)
+						sinodep, block, offset,
+						sizeof(*sinodep), &next_block,
+						&next_offset))
+					goto failed_read;
+				SQUASHFS_SWAP_REG_INODE_HEADER_2(inodep, sinodep);
+			} else
+				if (!squashfs_get_cached_block(s, (char *)
+						inodep, block, offset,
+						sizeof(*inodep), &next_block,
+						&next_offset))
+					goto failed_read;
+
+			frag_blk = SQUASHFS_INVALID_BLK;
+			if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
+					!get_fragment_location_2(s,
+					inodep->fragment, &frag_blk, &frag_size))
+				goto failed_read;
+				
+			i->i_size = inodep->file_size;
+			i->i_fop = &generic_ro_fops;
+			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;
+			SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
+			SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
+			SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
+			SQUASHFS_I(i)->start_block = inodep->start_block;
+			SQUASHFS_I(i)->u.s1.block_list_start = next_block;
+			SQUASHFS_I(i)->offset = next_offset;
+			i->i_data.a_ops = &squashfs_aops;
+
+			TRACE("File inode %x:%x, start_block %x, "
+					"block_list_start %llx, offset %x\n",
+					SQUASHFS_INODE_BLK(inode), offset,
+					inodep->start_block, next_block,
+					next_offset);
+			break;
+		}
+		case SQUASHFS_DIR_TYPE: {
+			struct squashfs_dir_inode_header_2 *inodep = &id.dir;
+			struct squashfs_dir_inode_header_2 *sinodep = &sid.dir;
+
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, (char *)
+						sinodep, block, offset,
+						sizeof(*sinodep), &next_block,
+						&next_offset))
+					goto failed_read;
+				SQUASHFS_SWAP_DIR_INODE_HEADER_2(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_2;
+			i->i_fop = &squashfs_dir_ops_2;
+			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;
+			SQUASHFS_I(i)->u.s2.parent_inode = 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: {
+			struct squashfs_ldir_inode_header_2 *inodep = &id.ldir;
+			struct squashfs_ldir_inode_header_2 *sinodep = &sid.ldir;
+
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, (char *)
+						sinodep, block, offset,
+						sizeof(*sinodep), &next_block,
+						&next_offset))
+					goto failed_read;
+				SQUASHFS_SWAP_LDIR_INODE_HEADER_2(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_2;
+			i->i_fop = &squashfs_dir_ops_2;
+			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;
+			SQUASHFS_I(i)->u.s2.parent_inode = 0;
+
+			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: {
+			struct squashfs_symlink_inode_header_2 *inodep =
+								&id.symlink;
+			struct squashfs_symlink_inode_header_2 *sinodep =
+								&sid.symlink;
+	
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, (char *)
+						sinodep, block, offset,
+						sizeof(*sinodep), &next_block,
+						&next_offset))
+					goto failed_read;
+				SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(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 %llx, "
+					"offset %x\n",
+					SQUASHFS_INODE_BLK(inode), offset,
+					next_block, next_offset);
+			break;
+		 }
+		 case SQUASHFS_BLKDEV_TYPE:
+		 case SQUASHFS_CHRDEV_TYPE: {
+			struct squashfs_dev_inode_header_2 *inodep = &id.dev;
+			struct squashfs_dev_inode_header_2 *sinodep = &sid.dev;
+
+			if (msblk->swap) {
+				if (!squashfs_get_cached_block(s, (char *)
+						sinodep, block, offset,
+						sizeof(*sinodep), &next_block,
+						&next_offset))
+					goto failed_read;
+				SQUASHFS_SWAP_DEV_INODE_HEADER_2(inodep, sinodep);
+			} else	
+				if (!squashfs_get_cached_block(s, (char *)
+						inodep, block, offset,
+						sizeof(*inodep), &next_block,
+						&next_offset))
+					goto failed_read;
+
+			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_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;
+	}
+	
+	return 1;
+
+failed_read:
+	ERROR("Unable to read inode [%x:%x]\n", block, offset);
+
+failed_read1:
+	return 0;
+}
+
+
+static int get_dir_index_using_offset(struct super_block *s, long long 
+				*next_block, unsigned int *next_offset,
+				long long index_start,
+				unsigned int index_offset, int i_count,
+				long long f_pos)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	int i, length = 0;
+	struct squashfs_dir_index_2 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)
+		goto finish;
+
+	for (i = 0; i < i_count; i++) {
+		if (msblk->swap) {
+			struct squashfs_dir_index_2 sindex;
+			squashfs_get_cached_block(s, (char *) &sindex,
+					index_start, index_offset,
+					sizeof(sindex), &index_start,
+					&index_offset);
+			SQUASHFS_SWAP_DIR_INDEX_2(&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;
+
+finish:
+	return length;
+}
+
+
+static int get_dir_index_using_name(struct super_block *s, long long
+				*next_block, unsigned int *next_offset,
+				long long index_start,
+				unsigned int index_offset, int i_count,
+				const char *name, int size)
+{
+	struct squashfs_sb_info *msblk = s->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	int i, length = 0;
+	struct squashfs_dir_index_2 *index;
+	char *str;
+
+	TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
+
+	if (!(str = kmalloc(sizeof(struct squashfs_dir_index) +
+		(SQUASHFS_NAME_LEN + 1) * 2, GFP_KERNEL))) {
+		ERROR("Failed to allocate squashfs_dir_index\n");
+		goto failure;
+	}
+
+	index = (struct squashfs_dir_index_2 *) (str + SQUASHFS_NAME_LEN + 1);
+	strncpy(str, name, size);
+	str[size] = '\0';
+
+	for (i = 0; i < i_count; i++) {
+		if (msblk->swap) {
+			struct squashfs_dir_index_2 sindex;
+			squashfs_get_cached_block(s, (char *) &sindex,
+					index_start, index_offset,
+					sizeof(sindex), &index_start,
+					&index_offset);
+			SQUASHFS_SWAP_DIR_INDEX_2(index, &sindex);
+		} else
+			squashfs_get_cached_block(s, (char *) index,
+					index_start, index_offset,
+					sizeof(struct squashfs_dir_index_2),
+					&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;
+	kfree(str);
+failure:
+	return length;
+}
+
+		
+static int squashfs_readdir_2(struct file *file, void *dirent, filldir_t filldir)
+{
+	struct inode *i = file->f_dentry->d_inode;
+	struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	long long next_block = SQUASHFS_I(i)->start_block +
+		sblk->directory_table_start;
+	int next_offset = SQUASHFS_I(i)->offset, length = 0,
+		dir_count;
+	struct squashfs_dir_header_2 dirh;
+	struct squashfs_dir_entry_2 *dire;
+
+	TRACE("Entered squashfs_readdir_2 [%llx:%x]\n", next_block, next_offset);
+
+	if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
+		SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
+		ERROR("Failed to allocate squashfs_dir_entry\n");
+		goto finish;
+	}
+
+	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_size_read(i)) {
+		/* read directory header */
+		if (msblk->swap) {
+			struct squashfs_dir_header_2 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_2(&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) {
+				struct squashfs_dir_entry_2 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_2(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");
+				goto finish;
+			}
+			file->f_pos = length;
+		}
+	}
+
+finish:
+	kfree(dire);
+	return 0;
+
+failed_read:
+	ERROR("Unable to read directory block [%llx:%x]\n", next_block,
+		next_offset);
+	kfree(dire);
+	return 0;
+}
+
+
+static struct dentry *squashfs_lookup_2(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;
+	struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
+	struct squashfs_super_block *sblk = &msblk->sblk;
+	long long next_block = SQUASHFS_I(i)->start_block +
+				sblk->directory_table_start;
+	int next_offset = SQUASHFS_I(i)->offset, length = 0,
+				dir_count;
+	struct squashfs_dir_header_2 dirh;
+	struct squashfs_dir_entry_2 *dire;
+	int sorted = sblk->s_major == 2 && sblk->s_minor >= 1;
+
+	TRACE("Entered squashfs_lookup_2 [%llx:%x]\n", next_block, next_offset);
+
+	if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
+		SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
+		ERROR("Failed to allocate squashfs_dir_entry\n");
+		goto exit_loop;
+	}
+
+	if (len > SQUASHFS_NAME_LEN)
+		goto exit_loop;
+
+	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_size_read(i)) {
+		/* read directory header */
+		if (msblk->swap) {
+			struct squashfs_dir_header_2 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_2(&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) {
+				struct squashfs_dir_entry_2 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_2(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 (sorted && name[0] < dire->name[0])
+				goto exit_loop;
+
+			if ((len == dire->size + 1) && !strncmp(name,
+						dire->name, len)) {
+				squashfs_inode_t ino =
+					SQUASHFS_MKINODE(dirh.start_block,
+					dire->offset);
+				unsigned int inode_number = SQUASHFS_MK_VFS_INODE(dirh.start_block,
+					dire->offset);
+
+				TRACE("calling squashfs_iget for directory "
+					"entry %s, inode %x:%x, %lld\n", name,
+					dirh.start_block, dire->offset, ino);
+
+				inode = squashfs_iget(i->i_sb, ino, inode_number);
+
+				goto exit_loop;
+			}
+		}
+	}
+
+exit_loop:
+	kfree(dire);
+	d_add(dentry, inode);
+	return ERR_PTR(0);
+
+failed_read:
+	ERROR("Unable to read directory block [%llx:%x]\n", next_block,
+		next_offset);
+	goto exit_loop;
+}
+
+
+int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
+{
+	struct squashfs_super_block *sblk = &msblk->sblk;
+
+	msblk->read_inode = squashfs_read_inode_2;
+	msblk->read_fragment_index_table = read_fragment_index_table_2;
+
+	sblk->bytes_used = sblk->bytes_used_2;
+	sblk->uid_start = sblk->uid_start_2;
+	sblk->guid_start = sblk->guid_start_2;
+	sblk->inode_table_start = sblk->inode_table_start_2;
+	sblk->directory_table_start = sblk->directory_table_start_2;
+	sblk->fragment_table_start = sblk->fragment_table_start_2;
+
+	return 1;
+}
diff -Naur linux-2.6.28/fs/squashfs/squashfs.h linux-2.6.28-magellan/fs/squashfs/squashfs.h
--- linux-2.6.28/fs/squashfs/squashfs.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.28-magellan/fs/squashfs/squashfs.h	2009-01-25 11:13:12.000000000 +0100
@@ -0,0 +1,86 @@
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ * 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.h
+ */
+
+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
+#undef CONFIG_SQUASHFS_1_0_COMPATIBILITY
+#endif
+
+#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...)	do { \
+				if (!silent) \
+				printk(KERN_ERR "SQUASHFS error: "s, ## args);\
+				} while(0)
+
+#define WARNING(s, args...)	printk(KERN_WARNING "SQUASHFS: "s, ## args)
+
+static inline struct squashfs_inode_info *SQUASHFS_I(struct inode *inode)
+{
+	return list_entry(inode, struct squashfs_inode_info, vfs_inode);
+}
+
+#if defined(CONFIG_SQUASHFS_1_0_COMPATIBILITY ) || defined(CONFIG_SQUASHFS_2_0_COMPATIBILITY)
+#define SQSH_EXTERN
+extern unsigned int squashfs_read_data(struct super_block *s, char *buffer,
+				long long index, unsigned int length,
+				long long *next_index, int srclength);
+extern int squashfs_get_cached_block(struct super_block *s, void *buffer,
+				long long block, unsigned int offset,
+				int length, long long *next_block,
+				unsigned int *next_offset);
+extern void release_cached_fragment(struct squashfs_sb_info *msblk, struct
+					squashfs_cache_entry *fragment);
+extern struct squashfs_cache_entry *get_cached_fragment(struct super_block
+					*s, long long start_block,
+					int length);
+extern struct inode *squashfs_iget(struct super_block *s, squashfs_inode_t inode, unsigned int inode_number);
+extern const struct address_space_operations squashfs_symlink_aops;
+extern const struct address_space_operations squashfs_aops;
+extern struct inode_operations squashfs_dir_inode_ops;
+#else
+#define SQSH_EXTERN static
+#endif
+
+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
+extern int squashfs_1_0_supported(struct squashfs_sb_info *msblk);
+#else
+static inline int squashfs_1_0_supported(struct squashfs_sb_info *msblk)
+{
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY
+extern int squashfs_2_0_supported(struct squashfs_sb_info *msblk);
+#else
+static inline int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
+{
+	return 0;
+}
+#endif
diff -Naur linux-2.6.28/include/linux/squashfs_fs.h linux-2.6.28-magellan/include/linux/squashfs_fs.h
--- linux-2.6.28/include/linux/squashfs_fs.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.28-magellan/include/linux/squashfs_fs.h	2009-01-25 11:13:12.000000000 +0100
@@ -0,0 +1,935 @@
+#ifndef SQUASHFS_FS
+#define SQUASHFS_FS
+
+/*
+ * Squashfs
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ * 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
+ */
+
+#ifndef CONFIG_SQUASHFS_2_0_COMPATIBILITY
+#define CONFIG_SQUASHFS_2_0_COMPATIBILITY
+#endif
+
+#define SQUASHFS_CACHED_FRAGMENTS	CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE	
+#define SQUASHFS_MAJOR			3
+#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		131072
+#define SQUASHFS_FILE_LOG		17
+
+#define SQUASHFS_FILE_MAX_SIZE		1048576
+
+/* 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_FRAG		((unsigned int) 0xffffffff)
+#define SQUASHFS_INVALID_BLK		((long long) -1)
+#define SQUASHFS_USED_BLK		((long long) -2)
+
+/* 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_EXPORT			7
+
+#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_EXPORTABLE(flags)		SQUASHFS_BIT(flags, \
+						SQUASHFS_EXPORT)
+
+#define SQUASHFS_CHECK_DATA(flags)		SQUASHFS_BIT(flags, \
+						SQUASHFS_CHECK)
+
+#define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, \
+		duplicate_checking, exportable)	(noi | (nod << 1) | (check_data << 2) \
+		| (nof << 3) | (no_frag << 4) | (always_frag << 5) | \
+		(duplicate_checking << 6) | (exportable << 7))
+
+/* 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
+#define SQUASHFS_LREG_TYPE		9
+
+/* 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)
+
+#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_t)(((squashfs_inode_t) (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))
+/* XXX */
+
+/* Translate between VFS mode and squashfs mode */
+#define SQUASHFS_MODE(a)		((a) & 0xfff)
+
+/* fragment and fragment table defines */
+#define SQUASHFS_FRAGMENT_BYTES(A)	((A) * sizeof(struct 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(long long))
+
+/* inode lookup table defines */
+#define SQUASHFS_LOOKUP_BYTES(A)	((A) * sizeof(squashfs_inode_t))
+
+#define SQUASHFS_LOOKUP_BLOCK(A)		(SQUASHFS_LOOKUP_BYTES(A) / \
+						SQUASHFS_METADATA_SIZE)
+
+#define SQUASHFS_LOOKUP_BLOCK_OFFSET(A)		(SQUASHFS_LOOKUP_BYTES(A) % \
+						SQUASHFS_METADATA_SIZE)
+
+#define SQUASHFS_LOOKUP_BLOCKS(A)	((SQUASHFS_LOOKUP_BYTES(A) + \
+					SQUASHFS_METADATA_SIZE - 1) / \
+					SQUASHFS_METADATA_SIZE)
+
+#define SQUASHFS_LOOKUP_BLOCK_BYTES(A)	(SQUASHFS_LOOKUP_BLOCKS(A) *\
+					sizeof(long long))
+
+/* cached data constants for filesystem */
+#define SQUASHFS_CACHED_BLKS		8
+
+#define SQUASHFS_MAX_FILE_SIZE_LOG	64
+
+#define SQUASHFS_MAX_FILE_SIZE		((long long) 1 << \
+					(SQUASHFS_MAX_FILE_SIZE_LOG - 2))
+
+#define SQUASHFS_MARKER_BYTE		0xff
+
+/* meta index cache */
+#define SQUASHFS_META_INDEXES	(SQUASHFS_METADATA_SIZE / sizeof(unsigned int))
+#define SQUASHFS_META_ENTRIES	31
+#define SQUASHFS_META_NUMBER	8
+#define SQUASHFS_SLOTS		4
+
+struct meta_entry {
+	long long		data_block;
+	unsigned int		index_block;
+	unsigned short		offset;
+	unsigned short		pad;
+};
+
+struct meta_index {
+	unsigned int		inode_number;
+	unsigned int		offset;
+	unsigned short		entries;
+	unsigned short		skip;
+	unsigned short		locked;
+	unsigned short		pad;
+	struct meta_entry	meta_entry[SQUASHFS_META_ENTRIES];
+};
+
+
+/*
+ * definitions for structures on disk
+ */
+
+typedef long long		squashfs_block_t;
+typedef long long		squashfs_inode_t;
+
+struct squashfs_super_block {
+	unsigned int		s_magic;
+	unsigned int		inodes;
+	unsigned int		bytes_used_2;
+	unsigned int		uid_start_2;
+	unsigned int		guid_start_2;
+	unsigned int		inode_table_start_2;
+	unsigned int		directory_table_start_2;
+	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_t	root_inode;
+	unsigned int		block_size;
+	unsigned int		fragments;
+	unsigned int		fragment_table_start_2;
+	long long		bytes_used;
+	long long		uid_start;
+	long long		guid_start;
+	long long		inode_table_start;
+	long long		directory_table_start;
+	long long		fragment_table_start;
+	long long		lookup_table_start;
+} __attribute__ ((packed));
+
+struct squashfs_dir_index {
+	unsigned int		index;
+	unsigned int		start_block;
+	unsigned char		size;
+	unsigned char		name[0];
+} __attribute__ ((packed));
+
+#define SQUASHFS_BASE_INODE_HEADER		\
+	unsigned int		inode_type:4;	\
+	unsigned int		mode:12;	\
+	unsigned int		uid:8;		\
+	unsigned int		guid:8;		\
+	unsigned int		mtime;		\
+	unsigned int 		inode_number;
+
+struct squashfs_base_inode_header {
+	SQUASHFS_BASE_INODE_HEADER;
+} __attribute__ ((packed));
+
+struct squashfs_ipc_inode_header {
+	SQUASHFS_BASE_INODE_HEADER;
+	unsigned int		nlink;
+} __attribute__ ((packed));
+
+struct squashfs_dev_inode_header {
+	SQUASHFS_BASE_INODE_HEADER;
+	unsigned int		nlink;
+	unsigned short		rdev;
+} __attribute__ ((packed));
+	
+struct squashfs_symlink_inode_header {
+	SQUASHFS_BASE_INODE_HEADER;
+	unsigned int		nlink;
+	unsigned short		symlink_size;
+	char			symlink[0];
+} __attribute__ ((packed));
+
+struct squashfs_reg_inode_header {
+	SQUASHFS_BASE_INODE_HEADER;
+	squashfs_block_t	start_block;
+	unsigned int		fragment;
+	unsigned int		offset;
+	unsigned int		file_size;
+	unsigned short		block_list[0];
+} __attribute__ ((packed));
+
+struct squashfs_lreg_inode_header {
+	SQUASHFS_BASE_INODE_HEADER;
+	unsigned int		nlink;
+	squashfs_block_t	start_block;
+	unsigned int		fragment;
+	unsigned int		offset;
+	long long		file_size;
+	unsigned short		block_list[0];
+} __attribute__ ((packed));
+
+struct squashfs_dir_inode_header {
+	SQUASHFS_BASE_INODE_HEADER;
+	unsigned int		nlink;
+	unsigned int		file_size:19;
+	unsigned int		offset:13;
+	unsigned int		start_block;
+	unsigned int		parent_inode;
+} __attribute__  ((packed));
+
+struct squashfs_ldir_inode_header {
+	SQUASHFS_BASE_INODE_HEADER;
+	unsigned int		nlink;
+	unsigned int		file_size:27;
+	unsigned int		offset:13;
+	unsigned int		start_block;
+	unsigned int		i_count:16;
+	unsigned int		parent_inode;
+	struct squashfs_dir_index	index[0];
+} __attribute__  ((packed));
+
+union squashfs_inode_header {
+	struct squashfs_base_inode_header	base;
+	struct squashfs_dev_inode_header	dev;
+	struct squashfs_symlink_inode_header	symlink;
+	struct squashfs_reg_inode_header	reg;
+	struct squashfs_lreg_inode_header	lreg;
+	struct squashfs_dir_inode_header	dir;
+	struct squashfs_ldir_inode_header	ldir;
+	struct squashfs_ipc_inode_header	ipc;
+};
+	
+struct squashfs_dir_entry {
+	unsigned int		offset:13;
+	unsigned int		type:3;
+	unsigned int		size:8;
+	int			inode_number:16;
+	char			name[0];
+} __attribute__ ((packed));
+
+struct squashfs_dir_header {
+	unsigned int		count:8;
+	unsigned int		start_block;
+	unsigned int		inode_number;
+} __attribute__ ((packed));
+
+struct squashfs_fragment_entry {
+	long long		start_block;
+	unsigned int		size;
+	unsigned int		unused;
+} __attribute__ ((packed));
+
+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_START \
+	int bits;\
+	int b_pos;\
+	unsigned long long val;\
+	unsigned char *s;\
+	unsigned char *d;
+
+#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_super_block));\
+	SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\
+	SQUASHFS_SWAP((s)->inodes, d, 32, 32);\
+	SQUASHFS_SWAP((s)->bytes_used_2, d, 64, 32);\
+	SQUASHFS_SWAP((s)->uid_start_2, d, 96, 32);\
+	SQUASHFS_SWAP((s)->guid_start_2, d, 128, 32);\
+	SQUASHFS_SWAP((s)->inode_table_start_2, d, 160, 32);\
+	SQUASHFS_SWAP((s)->directory_table_start_2, 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_2, d, 472, 32);\
+	SQUASHFS_SWAP((s)->bytes_used, d, 504, 64);\
+	SQUASHFS_SWAP((s)->uid_start, d, 568, 64);\
+	SQUASHFS_SWAP((s)->guid_start, d, 632, 64);\
+	SQUASHFS_SWAP((s)->inode_table_start, d, 696, 64);\
+	SQUASHFS_SWAP((s)->directory_table_start, d, 760, 64);\
+	SQUASHFS_SWAP((s)->fragment_table_start, d, 824, 64);\
+	SQUASHFS_SWAP((s)->lookup_table_start, d, 888, 64);\
+}
+
+#define SQUASHFS_SWAP_BASE_INODE_CORE(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);\
+	SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
+	SQUASHFS_SWAP((s)->inode_number, d, 64, 32);
+
+#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
+}
+
+#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
+			sizeof(struct squashfs_ipc_inode_header))\
+	SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
+}
+
+#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
+			sizeof(struct squashfs_dev_inode_header)); \
+	SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
+	SQUASHFS_SWAP((s)->rdev, d, 128, 16);\
+}
+
+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
+			sizeof(struct squashfs_symlink_inode_header));\
+	SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
+	SQUASHFS_SWAP((s)->symlink_size, d, 128, 16);\
+}
+
+#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
+			sizeof(struct squashfs_reg_inode_header));\
+	SQUASHFS_SWAP((s)->start_block, d, 96, 64);\
+	SQUASHFS_SWAP((s)->fragment, d, 160, 32);\
+	SQUASHFS_SWAP((s)->offset, d, 192, 32);\
+	SQUASHFS_SWAP((s)->file_size, d, 224, 32);\
+}
+
+#define SQUASHFS_SWAP_LREG_INODE_HEADER(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
+			sizeof(struct squashfs_lreg_inode_header));\
+	SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
+	SQUASHFS_SWAP((s)->start_block, d, 128, 64);\
+	SQUASHFS_SWAP((s)->fragment, d, 192, 32);\
+	SQUASHFS_SWAP((s)->offset, d, 224, 32);\
+	SQUASHFS_SWAP((s)->file_size, d, 256, 64);\
+}
+
+#define SQUASHFS_SWAP_DIR_INODE_HEADER(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
+			sizeof(struct squashfs_dir_inode_header));\
+	SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
+	SQUASHFS_SWAP((s)->file_size, d, 128, 19);\
+	SQUASHFS_SWAP((s)->offset, d, 147, 13);\
+	SQUASHFS_SWAP((s)->start_block, d, 160, 32);\
+	SQUASHFS_SWAP((s)->parent_inode, d, 192, 32);\
+}
+
+#define SQUASHFS_SWAP_LDIR_INODE_HEADER(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
+			sizeof(struct squashfs_ldir_inode_header));\
+	SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
+	SQUASHFS_SWAP((s)->file_size, d, 128, 27);\
+	SQUASHFS_SWAP((s)->offset, d, 155, 13);\
+	SQUASHFS_SWAP((s)->start_block, d, 168, 32);\
+	SQUASHFS_SWAP((s)->i_count, d, 200, 16);\
+	SQUASHFS_SWAP((s)->parent_inode, d, 216, 32);\
+}
+
+#define SQUASHFS_SWAP_DIR_INDEX(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index));\
+	SQUASHFS_SWAP((s)->index, d, 0, 32);\
+	SQUASHFS_SWAP((s)->start_block, d, 32, 32);\
+	SQUASHFS_SWAP((s)->size, d, 64, 8);\
+}
+
+#define SQUASHFS_SWAP_DIR_HEADER(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header));\
+	SQUASHFS_SWAP((s)->count, d, 0, 8);\
+	SQUASHFS_SWAP((s)->start_block, d, 8, 32);\
+	SQUASHFS_SWAP((s)->inode_number, d, 40, 32);\
+}
+
+#define SQUASHFS_SWAP_DIR_ENTRY(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry));\
+	SQUASHFS_SWAP((s)->offset, d, 0, 13);\
+	SQUASHFS_SWAP((s)->type, d, 13, 3);\
+	SQUASHFS_SWAP((s)->size, d, 16, 8);\
+	SQUASHFS_SWAP((s)->inode_number, d, 24, 16);\
+}
+
+#define SQUASHFS_SWAP_FRAGMENT_ENTRY(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry));\
+	SQUASHFS_SWAP((s)->start_block, d, 0, 64);\
+	SQUASHFS_SWAP((s)->size, d, 64, 32);\
+}
+
+#define SQUASHFS_SWAP_INODE_T(s, d) SQUASHFS_SWAP_LONG_LONGS(s, d, 1)
+
+#define SQUASHFS_SWAP_SHORTS(s, d, n) {\
+	int entry;\
+	int bit_position;\
+	SQUASHFS_SWAP_START\
+	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_SWAP_START\
+	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_LONG_LONGS(s, d, n) {\
+	int entry;\
+	int bit_position;\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_MEMSET(s, d, n * 8);\
+	for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
+			64)\
+		SQUASHFS_SWAP(s[entry], d, bit_position, 64);\
+}
+
+#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\
+	int entry;\
+	int bit_position;\
+	SQUASHFS_SWAP_START\
+	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_LONG_LONGS(s, d, n)
+#define SQUASHFS_SWAP_LOOKUP_BLOCKS(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n)
+
+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
+
+struct squashfs_base_inode_header_1 {
+	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));
+
+struct squashfs_ipc_inode_header_1 {
+	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));
+
+struct squashfs_dev_inode_header_1 {
+	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));
+	
+struct squashfs_symlink_inode_header_1 {
+	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));
+
+struct squashfs_reg_inode_header_1 {
+	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;
+	unsigned int		start_block;
+	unsigned int		file_size:32;
+	unsigned short		block_list[0];
+} __attribute__ ((packed));
+
+struct squashfs_dir_inode_header_1 {
+	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));
+
+union squashfs_inode_header_1 {
+	struct squashfs_base_inode_header_1	base;
+	struct squashfs_dev_inode_header_1	dev;
+	struct squashfs_symlink_inode_header_1	symlink;
+	struct squashfs_reg_inode_header_1	reg;
+	struct squashfs_dir_inode_header_1	dir;
+	struct squashfs_ipc_inode_header_1	ipc;
+};
+
+#define SQUASHFS_SWAP_BASE_INODE_CORE_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_BASE_INODE_HEADER_1(s, d, n) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n)\
+}
+
+#define SQUASHFS_SWAP_IPC_INODE_HEADER_1(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
+			sizeof(struct 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_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
+			sizeof(struct squashfs_dev_inode_header_1));\
+	SQUASHFS_SWAP((s)->rdev, d, 24, 16);\
+}
+
+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
+			sizeof(struct squashfs_symlink_inode_header_1));\
+	SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\
+}
+
+#define SQUASHFS_SWAP_REG_INODE_HEADER_1(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
+			sizeof(struct 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, 32);\
+}
+
+#define SQUASHFS_SWAP_DIR_INODE_HEADER_1(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
+			sizeof(struct 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 CONFIG_SQUASHFS_2_0_COMPATIBILITY
+
+struct squashfs_dir_index_2 {
+	unsigned int		index:27;
+	unsigned int		start_block:29;
+	unsigned char		size;
+	unsigned char		name[0];
+} __attribute__ ((packed));
+
+struct squashfs_base_inode_header_2 {
+	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));
+
+struct squashfs_ipc_inode_header_2 {
+	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));
+
+struct squashfs_dev_inode_header_2 {
+	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));
+	
+struct squashfs_symlink_inode_header_2 {
+	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));
+
+struct squashfs_reg_inode_header_2 {
+	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;
+	unsigned int		start_block;
+	unsigned int		fragment;
+	unsigned int		offset;
+	unsigned int		file_size:32;
+	unsigned short		block_list[0];
+} __attribute__ ((packed));
+
+struct squashfs_dir_inode_header_2 {
+	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));
+
+struct squashfs_ldir_inode_header_2 {
+	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;
+	struct squashfs_dir_index_2	index[0];
+} __attribute__  ((packed));
+
+union squashfs_inode_header_2 {
+	struct squashfs_base_inode_header_2	base;
+	struct squashfs_dev_inode_header_2	dev;
+	struct squashfs_symlink_inode_header_2	symlink;
+	struct squashfs_reg_inode_header_2	reg;
+	struct squashfs_dir_inode_header_2	dir;
+	struct squashfs_ldir_inode_header_2	ldir;
+	struct squashfs_ipc_inode_header_2	ipc;
+};
+	
+struct squashfs_dir_header_2 {
+	unsigned int		count:8;
+	unsigned int		start_block:24;
+} __attribute__ ((packed));
+
+struct squashfs_dir_entry_2 {
+	unsigned int		offset:13;
+	unsigned int		type:3;
+	unsigned int		size:8;
+	char			name[0];
+} __attribute__ ((packed));
+
+struct squashfs_fragment_entry_2 {
+	unsigned int		start_block;
+	unsigned int		size;
+} __attribute__ ((packed));
+
+#define SQUASHFS_SWAP_BASE_INODE_CORE_2(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_BASE_INODE_HEADER_2(s, d, n) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
+}
+
+#define SQUASHFS_SWAP_IPC_INODE_HEADER_2(s, d) \
+	SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, sizeof(struct squashfs_ipc_inode_header_2))
+
+#define SQUASHFS_SWAP_DEV_INODE_HEADER_2(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
+			sizeof(struct squashfs_dev_inode_header_2)); \
+	SQUASHFS_SWAP((s)->rdev, d, 32, 16);\
+}
+
+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
+			sizeof(struct squashfs_symlink_inode_header_2));\
+	SQUASHFS_SWAP((s)->symlink_size, d, 32, 16);\
+}
+
+#define SQUASHFS_SWAP_REG_INODE_HEADER_2(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
+			sizeof(struct squashfs_reg_inode_header_2));\
+	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, 32);\
+}
+
+#define SQUASHFS_SWAP_DIR_INODE_HEADER_2(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
+			sizeof(struct squashfs_dir_inode_header_2));\
+	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_2(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
+			sizeof(struct squashfs_ldir_inode_header_2));\
+	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_2(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index_2));\
+	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_2(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header_2));\
+	SQUASHFS_SWAP((s)->count, d, 0, 8);\
+	SQUASHFS_SWAP((s)->start_block, d, 8, 24);\
+}
+
+#define SQUASHFS_SWAP_DIR_ENTRY_2(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry_2));\
+	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_2(s, d) {\
+	SQUASHFS_SWAP_START\
+	SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry_2));\
+	SQUASHFS_SWAP((s)->start_block, d, 0, 32);\
+	SQUASHFS_SWAP((s)->size, d, 32, 32);\
+}
+
+#define SQUASHFS_SWAP_FRAGMENT_INDEXES_2(s, d, n) SQUASHFS_SWAP_INTS(s, d, n)
+
+/* fragment and fragment table defines */
+#define SQUASHFS_FRAGMENT_BYTES_2(A)	(A * sizeof(struct squashfs_fragment_entry_2))
+
+#define SQUASHFS_FRAGMENT_INDEX_2(A)	(SQUASHFS_FRAGMENT_BYTES_2(A) / \
+					SQUASHFS_METADATA_SIZE)
+
+#define SQUASHFS_FRAGMENT_INDEX_OFFSET_2(A)	(SQUASHFS_FRAGMENT_BYTES_2(A) % \
+						SQUASHFS_METADATA_SIZE)
+
+#define SQUASHFS_FRAGMENT_INDEXES_2(A)	((SQUASHFS_FRAGMENT_BYTES_2(A) + \
+					SQUASHFS_METADATA_SIZE - 1) / \
+					SQUASHFS_METADATA_SIZE)
+
+#define SQUASHFS_FRAGMENT_INDEX_BYTES_2(A)	(SQUASHFS_FRAGMENT_INDEXES_2(A) *\
+						sizeof(int))
+
+#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) {\
+	b_pos = pos % 8;\
+	val = 0;\
+	s = (unsigned char *)p + (pos / 8);\
+	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 -Naur linux-2.6.28/include/linux/squashfs_fs_i.h linux-2.6.28-magellan/include/linux/squashfs_fs_i.h
--- linux-2.6.28/include/linux/squashfs_fs_i.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.28-magellan/include/linux/squashfs_fs_i.h	2009-01-25 11:13:12.000000000 +0100
@@ -0,0 +1,45 @@
+#ifndef SQUASHFS_FS_I
+#define SQUASHFS_FS_I
+/*
+ * Squashfs
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ * 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
+ */
+
+struct squashfs_inode_info {
+	long long	start_block;
+	unsigned int	offset;
+	union {
+		struct {
+			long long	fragment_start_block;
+			unsigned int	fragment_size;
+			unsigned int	fragment_offset;
+			long long	block_list_start;
+		} s1;
+		struct {
+			long long	directory_index_start;
+			unsigned int	directory_index_offset;
+			unsigned int	directory_index_count;
+			unsigned int	parent_inode;
+		} s2;
+	} u;
+	struct inode	vfs_inode;
+};
+#endif
diff -Naur linux-2.6.28/include/linux/squashfs_fs_sb.h linux-2.6.28-magellan/include/linux/squashfs_fs_sb.h
--- linux-2.6.28/include/linux/squashfs_fs_sb.h	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.28-magellan/include/linux/squashfs_fs_sb.h	2009-01-25 11:13:12.000000000 +0100
@@ -0,0 +1,79 @@
+#ifndef SQUASHFS_FS_SB
+#define SQUASHFS_FS_SB
+/*
+ * Squashfs
+ *
+ * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ * 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>
+
+struct squashfs_cache_entry {
+	long long	block;
+	int		length;
+	int		locked;
+	long long	next_index;
+	char		pending;
+	char		error;
+	int		waiting;
+	wait_queue_head_t	wait_queue;
+	char		*data;
+};
+
+struct squashfs_cache {
+	char *name;
+	int entries;
+	int block_size;
+	int next_blk;
+	int waiting;
+	int unused_blks;
+	int use_vmalloc;
+	spinlock_t lock;
+	wait_queue_head_t wait_queue;
+	struct squashfs_cache_entry entry[0];
+};
+
+struct squashfs_sb_info {
+	struct squashfs_super_block	sblk;
+	int			devblksize;
+	int			devblksize_log2;
+	int			swap;
+	struct squashfs_cache	*block_cache;
+	struct squashfs_cache	*fragment_cache;
+	int			next_meta_index;
+	unsigned int		*uid;
+	unsigned int		*guid;
+	long long		*fragment_index;
+	unsigned int		*fragment_index_2;
+	char			*read_page;
+	struct mutex		read_data_mutex;
+	struct mutex		read_page_mutex;
+	struct mutex		meta_index_mutex;
+	struct meta_index	*meta_index;
+	z_stream		stream;
+	long long		*inode_lookup_table;
+	int			(*read_inode)(struct inode *i,  squashfs_inode_t \
+				inode);
+	long long		(*read_blocklist)(struct inode *inode, int \
+				index, int readahead_blks, char *block_list, \
+				unsigned short **block_p, unsigned int *bsize);
+	int			(*read_fragment_index_table)(struct super_block *s);
+};
+#endif
diff -Naur linux-2.6.28/init/do_mounts_rd.c linux-2.6.28-magellan/init/do_mounts_rd.c
--- linux-2.6.28/init/do_mounts_rd.c	2008-12-25 00:26:37.000000000 +0100
+++ linux-2.6.28-magellan/init/do_mounts_rd.c	2009-01-25 11:13:12.000000000 +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>
 
@@ -37,6 +38,7 @@
  * numbers could not be found.
  *
  * We currently check for the following magic numbers:
+ *      squashfs
  * 	minix
  * 	ext2
  *	romfs
@@ -51,6 +53,7 @@
 	struct ext2_super_block *ext2sb;
 	struct romfs_super_block *romfsb;
 	struct cramfs_super *cramfsb;
+	struct squashfs_super_block *squashfsb;
 	int nblocks = -1;
 	unsigned char *buf;
 
@@ -62,6 +65,7 @@
 	ext2sb = (struct ext2_super_block *) buf;
 	romfsb = (struct romfs_super_block *) buf;
 	cramfsb = (struct cramfs_super *) buf;
+	squashfsb = (struct squashfs_super_block *) buf;
 	memset(buf, 0xe5, size);
 
 	/*
@@ -99,6 +103,18 @@
 		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);
+		if (squashfsb->s_major < 3)
+			nblocks = (squashfsb->bytes_used_2+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
+		else
+			nblocks = (squashfsb->bytes_used+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
+		goto done;
+	}
+
 	/*
 	 * Read block 1 to test for minix and ext2 superblock
 	 */