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source: clfs-embedded/patches/linux-2.6.19.2-squashfs-1.patch @ 0e9e889

Last change on this file since 0e9e889 was be76242, checked in by Jim Gifford <clfs@…>, 17 years ago
Updated to Linux 2.6.19.2 Fixes for uClibc Changed > to > Updated all Linux Patches Updated Linux Headers Updated to Busybox 1.4.1 Added E2FSProgs since it was removed from Busybox Fixed Typos
Property mode set to `100644`
File size: 123.3 KB

Rev	Line
[21e0fdf]	1	diff -Nru linux-2.6.19.ori2/fs/Kconfig linux-2.6.19.ori/fs/Kconfig
	2	--- linux-2.6.19.ori2/fs/Kconfig 2006-11-29 22:57:37.000000000 +0100
	3	+++ linux-2.6.19.ori/fs/Kconfig 2006-12-03 00:12:36.000000000 +0100
	4	@@ -1407,6 +1407,71 @@
	5
	6	If unsure, say N.
	7
	8	+config SQUASHFS
	9	+ tristate "SquashFS 3.1 - Squashed file system support"
	10	+ select ZLIB_INFLATE
	11	+ help
	12	+ Saying Y here includes support for SquashFS 3.1 (a Compressed Read-Only File
	13	+ System). Squashfs is a highly compressed read-only filesystem for Linux.
	14	+ It uses zlib compression to compress both files, inodes and directories.
	15	+ Inodes in the system are very small and all blocks are packed to minimise
	16	+ data overhead. Block sizes greater than 4K are supported up to a maximum of 64K.
	17	+ SquashFS 3.1 supports 64 bit filesystems and files (larger than 4GB), full
	18	+ uid/gid information, hard links and timestamps.
	19	+
	20	+ Squashfs is intended for general read-only filesystem use, for archival
	21	+ use (i.e. in cases where a .tar.gz file may be used), and in embedded
	22	+ systems where low overhead is needed. Further information and filesystem tools
	23	+ are available from http://squashfs.sourceforge.net.
	24	+
	25	+ If you want to compile this as a module ( = code which can be
	26	+ inserted in and removed from the running kernel whenever you want),
	27	+ say M here and read <file:Documentation/modules.txt>. The module
	28	+ will be called squashfs. Note that the root file system (the one
	29	+ containing the directory /) cannot be compiled as a module.
	30	+
	31	+ If unsure, say N.
	32	+
	33	+config SQUASHFS_EMBEDDED
	34	+
	35	+ bool "Additional options for memory-constrained systems"
	36	+ depends on SQUASHFS
	37	+ default n
	38	+ help
	39	+ Saying Y here allows you to specify cache sizes and how Squashfs
	40	+ allocates memory. This is only intended for memory constrained
	41	+ systems.
	42	+
	43	+ If unsure, say N.
	44	+
	45	+config SQUASHFS_FRAGMENT_CACHE_SIZE
	46	+ int "Number of fragments cached" if SQUASHFS_EMBEDDED
	47	+ depends on SQUASHFS
	48	+ default "3"
	49	+ help
	50	+ By default SquashFS caches the last 3 fragments read from
	51	+ the filesystem. Increasing this amount may mean SquashFS
	52	+ has to re-read fragments less often from disk, at the expense
	53	+ of extra system memory. Decreasing this amount will mean
	54	+ SquashFS uses less memory at the expense of extra reads from disk.
	55	+
	56	+ Note there must be at least one cached fragment. Anything
	57	+ much more than three will probably not make much difference.
	58	+
	59	+config SQUASHFS_VMALLOC
	60	+ bool "Use Vmalloc rather than Kmalloc" if SQUASHFS_EMBEDDED
	61	+ depends on SQUASHFS
	62	+ default n
	63	+ help
	64	+ By default SquashFS uses kmalloc to obtain fragment cache memory.
	65	+ Kmalloc memory is the standard kernel allocator, but it can fail
	66	+ on memory constrained systems. Because of the way Vmalloc works,
	67	+ Vmalloc can succeed when kmalloc fails. Specifying this option
	68	+ will make SquashFS always use Vmalloc to allocate the
	69	+ fragment cache memory.
	70	+
	71	+ If unsure, say N.
	72	+
	73	config VXFS_FS
	74	tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
	75	depends on BLOCK
	76	diff -Nru linux-2.6.19.ori2/fs/Makefile linux-2.6.19.ori/fs/Makefile
	77	--- linux-2.6.19.ori2/fs/Makefile 2006-11-29 22:57:37.000000000 +0100
	78	+++ linux-2.6.19.ori/fs/Makefile 2006-12-03 00:12:36.000000000 +0100
	79	@@ -67,6 +67,7 @@
	80	obj-$(CONFIG_JBD2) += jbd2/
	81	obj-$(CONFIG_EXT2_FS) += ext2/
	82	obj-$(CONFIG_CRAMFS) += cramfs/
	83	+obj-$(CONFIG_SQUASHFS) += squashfs/
	84	obj-$(CONFIG_RAMFS) += ramfs/
	85	obj-$(CONFIG_HUGETLBFS) += hugetlbfs/
	86	obj-$(CONFIG_CODA_FS) += coda/
	87	diff -Nru linux-2.6.19.ori2/fs/squashfs/Makefile linux-2.6.19.ori/fs/squashfs/Makefile
	88	--- linux-2.6.19.ori2/fs/squashfs/Makefile 1970-01-01 01:00:00.000000000 +0100
	89	+++ linux-2.6.19.ori/fs/squashfs/Makefile 2006-12-03 00:12:36.000000000 +0100
	90	@@ -0,0 +1,7 @@
	91	+#
	92	+# Makefile for the linux squashfs routines.
	93	+#
	94	+
	95	+obj-$(CONFIG_SQUASHFS) += squashfs.o
	96	+squashfs-y += inode.o
	97	+squashfs-y += squashfs2_0.o
	98	diff -Nru linux-2.6.19.ori2/fs/squashfs/inode.c linux-2.6.19.ori/fs/squashfs/inode.c
	99	--- linux-2.6.19.ori2/fs/squashfs/inode.c 1970-01-01 01:00:00.000000000 +0100
	100	+++ linux-2.6.19.ori/fs/squashfs/inode.c 2006-12-03 00:13:45.000000000 +0100
	101	@@ -0,0 +1,2152 @@
	102	+/*
	103	+ * Squashfs - a compressed read only filesystem for Linux
	104	+ *
	105	+ * Copyright (c) 2002, 2003, 2004, 2005, 2006
	106	+ * Phillip Lougher <phillip@lougher.org.uk>
	107	+ *
	108	+ * This program is free software; you can redistribute it and/or
	109	+ * modify it under the terms of the GNU General Public License
	110	+ * as published by the Free Software Foundation; either version 2,
	111	+ * or (at your option) any later version.
	112	+ *
	113	+ * This program is distributed in the hope that it will be useful,
	114	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	115	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	116	+ * GNU General Public License for more details.
	117	+ *
	118	+ * You should have received a copy of the GNU General Public License
	119	+ * along with this program; if not, write to the Free Software
	120	+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	121	+ *
	122	+ * inode.c
	123	+ */
	124	+
	125	+#include <linux/types.h>
	126	+#include <linux/squashfs_fs.h>
	127	+#include <linux/module.h>
	128	+#include <linux/errno.h>
	129	+#include <linux/slab.h>
	130	+#include <linux/zlib.h>
	131	+#include <linux/fs.h>
	132	+#include <linux/smp_lock.h>
	133	+#include <linux/slab.h>
	134	+#include <linux/squashfs_fs_sb.h>
	135	+#include <linux/squashfs_fs_i.h>
	136	+#include <linux/buffer_head.h>
	137	+#include <linux/vfs.h>
	138	+#include <linux/init.h>
	139	+#include <linux/dcache.h>
	140	+#include <linux/wait.h>
	141	+#include <linux/blkdev.h>
	142	+#include <linux/vmalloc.h>
	143	+#include <asm/uaccess.h>
	144	+#include <asm/semaphore.h>
	145	+
	146	+#include "squashfs.h"
	147	+
	148	+static void squashfs_put_super(struct super_block *);
	149	+static int squashfs_statfs(struct dentry , struct kstatfs );
	150	+static int squashfs_symlink_readpage(struct file file, struct page page);
	151	+static int squashfs_readpage(struct file file, struct page page);
	152	+static int squashfs_readpage4K(struct file file, struct page page);
	153	+static int squashfs_readdir(struct file , void , filldir_t);
	154	+static struct inode squashfs_alloc_inode(struct super_block sb);
	155	+static void squashfs_destroy_inode(struct inode *inode);
	156	+static int init_inodecache(void);
	157	+static void destroy_inodecache(void);
	158	+static struct dentry squashfs_lookup(struct inode , struct dentry *,
	159	+ struct nameidata *);
	160	+static struct inode squashfs_iget(struct super_block s, squashfs_inode_t inode);
	161	+static long long read_blocklist(struct inode *inode, int index,
	162	+ int readahead_blks, char *block_list,
	163	+ unsigned short *block_p, unsigned int bsize);
	164	+static int squashfs_get_sb(struct file_system_type , int, const char , void *,
	165	+ struct vfsmount *);
	166	+
	167	+static struct file_system_type squashfs_fs_type = {
	168	+ .owner = THIS_MODULE,
	169	+ .name = "squashfs",
	170	+ .get_sb = squashfs_get_sb,
	171	+ .kill_sb = kill_block_super,
	172	+ .fs_flags = FS_REQUIRES_DEV
	173	+};
	174	+
	175	+static unsigned char squashfs_filetype_table[] = {
	176	+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
	177	+};
	178	+
	179	+static struct super_operations squashfs_ops = {
	180	+ .alloc_inode = squashfs_alloc_inode,
	181	+ .destroy_inode = squashfs_destroy_inode,
	182	+ .statfs = squashfs_statfs,
	183	+ .put_super = squashfs_put_super,
	184	+};
	185	+
	186	+SQSH_EXTERN struct address_space_operations squashfs_symlink_aops = {
	187	+ .readpage = squashfs_symlink_readpage
	188	+};
	189	+
	190	+SQSH_EXTERN struct address_space_operations squashfs_aops = {
	191	+ .readpage = squashfs_readpage
	192	+};
	193	+
	194	+SQSH_EXTERN struct address_space_operations squashfs_aops_4K = {
	195	+ .readpage = squashfs_readpage4K
	196	+};
	197	+
	198	+static struct file_operations squashfs_dir_ops = {
	199	+ .read = generic_read_dir,
	200	+ .readdir = squashfs_readdir
	201	+};
	202	+
	203	+SQSH_EXTERN struct inode_operations squashfs_dir_inode_ops = {
	204	+ .lookup = squashfs_lookup
	205	+};
	206	+
	207	+
	208	+static struct buffer_head get_block_length(struct super_block s,
	209	+ int cur_index, int offset, int *c_byte)
	210	+{
	211	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	212	+ unsigned short temp;
	213	+ struct buffer_head *bh;
	214	+
	215	+ if (!(bh = sb_bread(s, *cur_index)))
	216	+ goto out;
	217	+
	218	+ if (msblk->devblksize - *offset == 1) {
	219	+ if (msblk->swap)
	220	+ ((unsigned char ) &temp)[1] = ((unsigned char *)
	221	+ (bh->b_data + *offset));
	222	+ else
	223	+ ((unsigned char ) &temp)[0] = ((unsigned char *)
	224	+ (bh->b_data + *offset));
	225	+ brelse(bh);
	226	+ if (!(bh = sb_bread(s, ++(*cur_index))))
	227	+ goto out;
	228	+ if (msblk->swap)
	229	+ ((unsigned char ) &temp)[0] = ((unsigned char *)
	230	+ bh->b_data);
	231	+ else
	232	+ ((unsigned char ) &temp)[1] = ((unsigned char *)
	233	+ bh->b_data);
	234	+ *c_byte = temp;
	235	+ *offset = 1;
	236	+ } else {
	237	+ if (msblk->swap) {
	238	+ ((unsigned char ) &temp)[1] = ((unsigned char *)
	239	+ (bh->b_data + *offset));
	240	+ ((unsigned char ) &temp)[0] = ((unsigned char *)
	241	+ (bh->b_data + *offset + 1));
	242	+ } else {
	243	+ ((unsigned char ) &temp)[0] = ((unsigned char *)
	244	+ (bh->b_data + *offset));
	245	+ ((unsigned char ) &temp)[1] = ((unsigned char *)
	246	+ (bh->b_data + *offset + 1));
	247	+ }
	248	+ *c_byte = temp;
	249	+ *offset += 2;
	250	+ }
	251	+
	252	+ if (SQUASHFS_CHECK_DATA(msblk->sblk.flags)) {
	253	+ if (*offset == msblk->devblksize) {
	254	+ brelse(bh);
	255	+ if (!(bh = sb_bread(s, ++(*cur_index))))
	256	+ goto out;
	257	+ *offset = 0;
	258	+ }
	259	+ if (((unsigned char ) (bh->b_data + *offset)) !=
	260	+ SQUASHFS_MARKER_BYTE) {
	261	+ ERROR("Metadata block marker corrupt @ %x\n",
	262	+ *cur_index);
	263	+ brelse(bh);
	264	+ goto out;
	265	+ }
	266	+ (*offset)++;
	267	+ }
	268	+ return bh;
	269	+
	270	+out:
	271	+ return NULL;
	272	+}
	273	+
	274	+
	275	+SQSH_EXTERN unsigned int squashfs_read_data(struct super_block s, char buffer,
	276	+ long long index, unsigned int length,
	277	+ long long *next_index)
	278	+{
	279	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	280	+ struct buffer_head *bh[((SQUASHFS_FILE_MAX_SIZE - 1) >>
	281	+ msblk->devblksize_log2) + 2];
	282	+ unsigned int offset = index & ((1 << msblk->devblksize_log2) - 1);
	283	+ unsigned int cur_index = index >> msblk->devblksize_log2;
	284	+ int bytes, avail_bytes, b = 0, k;
	285	+ char *c_buffer;
	286	+ unsigned int compressed;
	287	+ unsigned int c_byte = length;
	288	+
	289	+ if (c_byte) {
	290	+ bytes = msblk->devblksize - offset;
	291	+ compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte);
	292	+ c_buffer = compressed ? msblk->read_data : buffer;
	293	+ c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte);
	294	+
	295	+ TRACE("Block @ 0x%llx, %scompressed size %d\n", index, compressed
	296	+ ? "" : "un", (unsigned int) c_byte);
	297	+
	298	+ if (!(bh[0] = sb_getblk(s, cur_index)))
	299	+ goto block_release;
	300	+
	301	+ for (b = 1; bytes < c_byte; b++) {
	302	+ if (!(bh[b] = sb_getblk(s, ++cur_index)))
	303	+ goto block_release;
	304	+ bytes += msblk->devblksize;
	305	+ }
	306	+ ll_rw_block(READ, b, bh);
	307	+ } else {
	308	+ if (!(bh[0] = get_block_length(s, &cur_index, &offset,
	309	+ &c_byte)))
	310	+ goto read_failure;
	311	+
	312	+ bytes = msblk->devblksize - offset;
	313	+ compressed = SQUASHFS_COMPRESSED(c_byte);
	314	+ c_buffer = compressed ? msblk->read_data : buffer;
	315	+ c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte);
	316	+
	317	+ TRACE("Block @ 0x%llx, %scompressed size %d\n", index, compressed
	318	+ ? "" : "un", (unsigned int) c_byte);
	319	+
	320	+ for (b = 1; bytes < c_byte; b++) {
	321	+ if (!(bh[b] = sb_getblk(s, ++cur_index)))
	322	+ goto block_release;
	323	+ bytes += msblk->devblksize;
	324	+ }
	325	+ ll_rw_block(READ, b - 1, bh + 1);
	326	+ }
	327	+
	328	+ if (compressed)
	329	+ down(&msblk->read_data_mutex);
	330	+
	331	+ for (bytes = 0, k = 0; k < b; k++) {
	332	+ avail_bytes = (c_byte - bytes) > (msblk->devblksize - offset) ?
	333	+ msblk->devblksize - offset :
	334	+ c_byte - bytes;
	335	+ wait_on_buffer(bh[k]);
	336	+ if (!buffer_uptodate(bh[k]))
	337	+ goto block_release;
	338	+ memcpy(c_buffer + bytes, bh[k]->b_data + offset, avail_bytes);
	339	+ bytes += avail_bytes;
	340	+ offset = 0;
	341	+ brelse(bh[k]);
	342	+ }
	343	+
	344	+ /*
	345	+ * uncompress block
	346	+ */
	347	+ if (compressed) {
	348	+ int zlib_err;
	349	+
	350	+ msblk->stream.next_in = c_buffer;
	351	+ msblk->stream.avail_in = c_byte;
	352	+ msblk->stream.next_out = buffer;
	353	+ msblk->stream.avail_out = msblk->read_size;
	354	+
	355	+ if (((zlib_err = zlib_inflateInit(&msblk->stream)) != Z_OK) \|\|
	356	+ ((zlib_err = zlib_inflate(&msblk->stream, Z_FINISH))
	357	+ != Z_STREAM_END) \|\| ((zlib_err =
	358	+ zlib_inflateEnd(&msblk->stream)) != Z_OK)) {
	359	+ ERROR("zlib_fs returned unexpected result 0x%x\n",
	360	+ zlib_err);
	361	+ bytes = 0;
	362	+ } else
	363	+ bytes = msblk->stream.total_out;
	364	+
	365	+ up(&msblk->read_data_mutex);
	366	+ }
	367	+
	368	+ if (next_index)
	369	+ *next_index = index + c_byte + (length ? 0 :
	370	+ (SQUASHFS_CHECK_DATA(msblk->sblk.flags)
	371	+ ? 3 : 2));
	372	+ return bytes;
	373	+
	374	+block_release:
	375	+ while (--b >= 0)
	376	+ brelse(bh[b]);
	377	+
	378	+read_failure:
	379	+ ERROR("sb_bread failed reading block 0x%x\n", cur_index);
	380	+ return 0;
	381	+}
	382	+
	383	+
	384	+SQSH_EXTERN int squashfs_get_cached_block(struct super_block s, char buffer,
	385	+ long long block, unsigned int offset,
	386	+ int length, long long *next_block,
	387	+ unsigned int *next_offset)
	388	+{
	389	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	390	+ int n, i, bytes, return_length = length;
	391	+ long long next_index;
	392	+
	393	+ TRACE("Entered squashfs_get_cached_block [%llx:%x]\n", block, offset);
	394	+
	395	+ while ( 1 ) {
	396	+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++)
	397	+ if (msblk->block_cache[i].block == block)
	398	+ break;
	399	+
	400	+ down(&msblk->block_cache_mutex);
	401	+
	402	+ if (i == SQUASHFS_CACHED_BLKS) {
	403	+ /* read inode header block */
	404	+ for (i = msblk->next_cache, n = SQUASHFS_CACHED_BLKS;
	405	+ n ; n --, i = (i + 1) %
	406	+ SQUASHFS_CACHED_BLKS)
	407	+ if (msblk->block_cache[i].block !=
	408	+ SQUASHFS_USED_BLK)
	409	+ break;
	410	+
	411	+ if (n == 0) {
	412	+ wait_queue_t wait;
	413	+
	414	+ init_waitqueue_entry(&wait, current);
	415	+ add_wait_queue(&msblk->waitq, &wait);
	416	+ set_current_state(TASK_UNINTERRUPTIBLE);
	417	+ up(&msblk->block_cache_mutex);
	418	+ schedule();
	419	+ set_current_state(TASK_RUNNING);
	420	+ remove_wait_queue(&msblk->waitq, &wait);
	421	+ continue;
	422	+ }
	423	+ msblk->next_cache = (i + 1) % SQUASHFS_CACHED_BLKS;
	424	+
	425	+ if (msblk->block_cache[i].block ==
	426	+ SQUASHFS_INVALID_BLK) {
	427	+ if (!(msblk->block_cache[i].data =
	428	+ kmalloc(SQUASHFS_METADATA_SIZE,
	429	+ GFP_KERNEL))) {
	430	+ ERROR("Failed to allocate cache"
	431	+ "block\n");
	432	+ up(&msblk->block_cache_mutex);
	433	+ goto out;
	434	+ }
	435	+ }
	436	+
	437	+ msblk->block_cache[i].block = SQUASHFS_USED_BLK;
	438	+ up(&msblk->block_cache_mutex);
	439	+
	440	+ if (!(msblk->block_cache[i].length =
	441	+ squashfs_read_data(s,
	442	+ msblk->block_cache[i].data,
	443	+ block, 0, &next_index))) {
	444	+ ERROR("Unable to read cache block [%llx:%x]\n",
	445	+ block, offset);
	446	+ goto out;
	447	+ }
	448	+
	449	+ down(&msblk->block_cache_mutex);
	450	+ wake_up(&msblk->waitq);
	451	+ msblk->block_cache[i].block = block;
	452	+ msblk->block_cache[i].next_index = next_index;
	453	+ TRACE("Read cache block [%llx:%x]\n", block, offset);
	454	+ }
	455	+
	456	+ if (msblk->block_cache[i].block != block) {
	457	+ up(&msblk->block_cache_mutex);
	458	+ continue;
	459	+ }
	460	+
	461	+ if ((bytes = msblk->block_cache[i].length - offset) >= length) {
	462	+ if (buffer)
	463	+ memcpy(buffer, msblk->block_cache[i].data +
	464	+ offset, length);
	465	+ if (msblk->block_cache[i].length - offset == length) {
	466	+ *next_block = msblk->block_cache[i].next_index;
	467	+ *next_offset = 0;
	468	+ } else {
	469	+ *next_block = block;
	470	+ *next_offset = offset + length;
	471	+ }
	472	+ up(&msblk->block_cache_mutex);
	473	+ goto finish;
	474	+ } else {
	475	+ if (buffer) {
	476	+ memcpy(buffer, msblk->block_cache[i].data +
	477	+ offset, bytes);
	478	+ buffer += bytes;
	479	+ }
	480	+ block = msblk->block_cache[i].next_index;
	481	+ up(&msblk->block_cache_mutex);
	482	+ length -= bytes;
	483	+ offset = 0;
	484	+ }
	485	+ }
	486	+
	487	+finish:
	488	+ return return_length;
	489	+out:
	490	+ return 0;
	491	+}
	492	+
	493	+
	494	+static int get_fragment_location(struct super_block *s, unsigned int fragment,
	495	+ long long *fragment_start_block,
	496	+ unsigned int *fragment_size)
	497	+{
	498	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	499	+ long long start_block =
	500	+ msblk->fragment_index[SQUASHFS_FRAGMENT_INDEX(fragment)];
	501	+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET(fragment);
	502	+ struct squashfs_fragment_entry fragment_entry;
	503	+
	504	+ if (msblk->swap) {
	505	+ struct squashfs_fragment_entry sfragment_entry;
	506	+
	507	+ if (!squashfs_get_cached_block(s, (char *) &sfragment_entry,
	508	+ start_block, offset,
	509	+ sizeof(sfragment_entry), &start_block,
	510	+ &offset))
	511	+ goto out;
	512	+ SQUASHFS_SWAP_FRAGMENT_ENTRY(&fragment_entry, &sfragment_entry);
	513	+ } else
	514	+ if (!squashfs_get_cached_block(s, (char *) &fragment_entry,
	515	+ start_block, offset,
	516	+ sizeof(fragment_entry), &start_block,
	517	+ &offset))
	518	+ goto out;
	519	+
	520	+ *fragment_start_block = fragment_entry.start_block;
	521	+ *fragment_size = fragment_entry.size;
	522	+
	523	+ return 1;
	524	+
	525	+out:
	526	+ return 0;
	527	+}
	528	+
	529	+
	530	+SQSH_EXTERN void release_cached_fragment(struct squashfs_sb_info *msblk, struct
	531	+ squashfs_fragment_cache *fragment)
	532	+{
	533	+ down(&msblk->fragment_mutex);
	534	+ fragment->locked --;
	535	+ wake_up(&msblk->fragment_wait_queue);
	536	+ up(&msblk->fragment_mutex);
	537	+}
	538	+
	539	+
	540	+SQSH_EXTERN struct squashfs_fragment_cache *get_cached_fragment(struct super_block
	541	+ *s, long long start_block,
	542	+ int length)
	543	+{
	544	+ int i, n;
	545	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	546	+
	547	+ while ( 1 ) {
	548	+ down(&msblk->fragment_mutex);
	549	+
	550	+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS &&
	551	+ msblk->fragment[i].block != start_block; i++);
	552	+
	553	+ if (i == SQUASHFS_CACHED_FRAGMENTS) {
	554	+ for (i = msblk->next_fragment, n =
	555	+ SQUASHFS_CACHED_FRAGMENTS; n &&
	556	+ msblk->fragment[i].locked; n--, i = (i + 1) %
	557	+ SQUASHFS_CACHED_FRAGMENTS);
	558	+
	559	+ if (n == 0) {
	560	+ wait_queue_t wait;
	561	+
	562	+ init_waitqueue_entry(&wait, current);
	563	+ add_wait_queue(&msblk->fragment_wait_queue,
	564	+ &wait);
	565	+ set_current_state(TASK_UNINTERRUPTIBLE);
	566	+ up(&msblk->fragment_mutex);
	567	+ schedule();
	568	+ set_current_state(TASK_RUNNING);
	569	+ remove_wait_queue(&msblk->fragment_wait_queue,
	570	+ &wait);
	571	+ continue;
	572	+ }
	573	+ msblk->next_fragment = (msblk->next_fragment + 1) %
	574	+ SQUASHFS_CACHED_FRAGMENTS;
	575	+
	576	+ if (msblk->fragment[i].data == NULL)
	577	+ if (!(msblk->fragment[i].data = SQUASHFS_ALLOC
	578	+ (SQUASHFS_FILE_MAX_SIZE))) {
	579	+ ERROR("Failed to allocate fragment "
	580	+ "cache block\n");
	581	+ up(&msblk->fragment_mutex);
	582	+ goto out;
	583	+ }
	584	+
	585	+ msblk->fragment[i].block = SQUASHFS_INVALID_BLK;
	586	+ msblk->fragment[i].locked = 1;
	587	+ up(&msblk->fragment_mutex);
	588	+
	589	+ if (!(msblk->fragment[i].length = squashfs_read_data(s,
	590	+ msblk->fragment[i].data,
	591	+ start_block, length, NULL))) {
	592	+ ERROR("Unable to read fragment cache block "
	593	+ "[%llx]\n", start_block);
	594	+ msblk->fragment[i].locked = 0;
	595	+ goto out;
	596	+ }
	597	+
	598	+ msblk->fragment[i].block = start_block;
	599	+ TRACE("New fragment %d, start block %lld, locked %d\n",
	600	+ i, msblk->fragment[i].block,
	601	+ msblk->fragment[i].locked);
	602	+ break;
	603	+ }
	604	+
	605	+ msblk->fragment[i].locked++;
	606	+ up(&msblk->fragment_mutex);
	607	+ TRACE("Got fragment %d, start block %lld, locked %d\n", i,
	608	+ msblk->fragment[i].block,
	609	+ msblk->fragment[i].locked);
	610	+ break;
	611	+ }
	612	+
	613	+ return &msblk->fragment[i];
	614	+
	615	+out:
	616	+ return NULL;
	617	+}
	618	+
	619	+
	620	+static struct inode squashfs_new_inode(struct super_block s,
	621	+ struct squashfs_base_inode_header *inodeb)
	622	+{
	623	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	624	+ struct inode *i = new_inode(s);
	625	+
	626	+ if (i) {
	627	+ i->i_ino = inodeb->inode_number;
	628	+ i->i_mtime.tv_sec = inodeb->mtime;
	629	+ i->i_atime.tv_sec = inodeb->mtime;
	630	+ i->i_ctime.tv_sec = inodeb->mtime;
	631	+ i->i_uid = msblk->uid[inodeb->uid];
	632	+ i->i_mode = inodeb->mode;
	633	+ i->i_size = 0;
	634	+ if (inodeb->guid == SQUASHFS_GUIDS)
	635	+ i->i_gid = i->i_uid;
	636	+ else
	637	+ i->i_gid = msblk->guid[inodeb->guid];
	638	+ }
	639	+
	640	+ return i;
	641	+}
	642	+
	643	+
	644	+static struct inode squashfs_iget(struct super_block s, squashfs_inode_t inode)
	645	+{
	646	+ struct inode *i;
	647	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	648	+ struct squashfs_super_block *sblk = &msblk->sblk;
	649	+ long long block = SQUASHFS_INODE_BLK(inode) +
	650	+ sblk->inode_table_start;
	651	+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
	652	+ long long next_block;
	653	+ unsigned int next_offset;
	654	+ union squashfs_inode_header id, sid;
	655	+ struct squashfs_base_inode_header *inodeb = &id.base,
	656	+ *sinodeb = &sid.base;
	657	+
	658	+ TRACE("Entered squashfs_iget\n");
	659	+
	660	+ if (msblk->swap) {
	661	+ if (!squashfs_get_cached_block(s, (char *) sinodeb, block,
	662	+ offset, sizeof(*sinodeb), &next_block,
	663	+ &next_offset))
	664	+ goto failed_read;
	665	+ SQUASHFS_SWAP_BASE_INODE_HEADER(inodeb, sinodeb,
	666	+ sizeof(*sinodeb));
	667	+ } else
	668	+ if (!squashfs_get_cached_block(s, (char *) inodeb, block,
	669	+ offset, sizeof(*inodeb), &next_block,
	670	+ &next_offset))
	671	+ goto failed_read;
	672	+
	673	+ switch(inodeb->inode_type) {
	674	+ case SQUASHFS_FILE_TYPE: {
	675	+ unsigned int frag_size;
	676	+ long long frag_blk;
	677	+ struct squashfs_reg_inode_header *inodep = &id.reg;
	678	+ struct squashfs_reg_inode_header *sinodep = &sid.reg;
	679	+
	680	+ if (msblk->swap) {
	681	+ if (!squashfs_get_cached_block(s, (char *)
	682	+ sinodep, block, offset,
	683	+ sizeof(*sinodep), &next_block,
	684	+ &next_offset))
	685	+ goto failed_read;
	686	+ SQUASHFS_SWAP_REG_INODE_HEADER(inodep, sinodep);
	687	+ } else
	688	+ if (!squashfs_get_cached_block(s, (char *)
	689	+ inodep, block, offset,
	690	+ sizeof(*inodep), &next_block,
	691	+ &next_offset))
	692	+ goto failed_read;
	693	+
	694	+ frag_blk = SQUASHFS_INVALID_BLK;
	695	+ if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
	696	+ !get_fragment_location(s,
	697	+ inodep->fragment, &frag_blk, &frag_size))
	698	+ goto failed_read;
	699	+
	700	+ if((i = squashfs_new_inode(s, inodeb)) == NULL)
	701	+ goto failed_read1;
	702	+
	703	+ i->i_nlink = 1;
	704	+ i->i_size = inodep->file_size;
	705	+ i->i_fop = &generic_ro_fops;
	706	+ i->i_mode \|= S_IFREG;
	707	+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
	708	+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
	709	+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
	710	+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
	711	+ SQUASHFS_I(i)->start_block = inodep->start_block;
	712	+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
	713	+ SQUASHFS_I(i)->offset = next_offset;
	714	+ if (sblk->block_size > 4096)
	715	+ i->i_data.a_ops = &squashfs_aops;
	716	+ else
	717	+ i->i_data.a_ops = &squashfs_aops_4K;
	718	+
	719	+ TRACE("File inode %x:%x, start_block %llx, "
	720	+ "block_list_start %llx, offset %x\n",
	721	+ SQUASHFS_INODE_BLK(inode), offset,
	722	+ inodep->start_block, next_block,
	723	+ next_offset);
	724	+ break;
	725	+ }
	726	+ case SQUASHFS_LREG_TYPE: {
	727	+ unsigned int frag_size;
	728	+ long long frag_blk;
	729	+ struct squashfs_lreg_inode_header *inodep = &id.lreg;
	730	+ struct squashfs_lreg_inode_header *sinodep = &sid.lreg;
	731	+
	732	+ if (msblk->swap) {
	733	+ if (!squashfs_get_cached_block(s, (char *)
	734	+ sinodep, block, offset,
	735	+ sizeof(*sinodep), &next_block,
	736	+ &next_offset))
	737	+ goto failed_read;
	738	+ SQUASHFS_SWAP_LREG_INODE_HEADER(inodep, sinodep);
	739	+ } else
	740	+ if (!squashfs_get_cached_block(s, (char *)
	741	+ inodep, block, offset,
	742	+ sizeof(*inodep), &next_block,
	743	+ &next_offset))
	744	+ goto failed_read;
	745	+
	746	+ frag_blk = SQUASHFS_INVALID_BLK;
	747	+ if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
	748	+ !get_fragment_location(s,
	749	+ inodep->fragment, &frag_blk, &frag_size))
	750	+ goto failed_read;
	751	+
	752	+ if((i = squashfs_new_inode(s, inodeb)) == NULL)
	753	+ goto failed_read1;
	754	+
	755	+ i->i_nlink = inodep->nlink;
	756	+ i->i_size = inodep->file_size;
	757	+ i->i_fop = &generic_ro_fops;
	758	+ i->i_mode \|= S_IFREG;
	759	+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
	760	+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
	761	+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
	762	+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
	763	+ SQUASHFS_I(i)->start_block = inodep->start_block;
	764	+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
	765	+ SQUASHFS_I(i)->offset = next_offset;
	766	+ if (sblk->block_size > 4096)
	767	+ i->i_data.a_ops = &squashfs_aops;
	768	+ else
	769	+ i->i_data.a_ops = &squashfs_aops_4K;
	770	+
	771	+ TRACE("File inode %x:%x, start_block %llx, "
	772	+ "block_list_start %llx, offset %x\n",
	773	+ SQUASHFS_INODE_BLK(inode), offset,
	774	+ inodep->start_block, next_block,
	775	+ next_offset);
	776	+ break;
	777	+ }
	778	+ case SQUASHFS_DIR_TYPE: {
	779	+ struct squashfs_dir_inode_header *inodep = &id.dir;
	780	+ struct squashfs_dir_inode_header *sinodep = &sid.dir;
	781	+
	782	+ if (msblk->swap) {
	783	+ if (!squashfs_get_cached_block(s, (char *)
	784	+ sinodep, block, offset,
	785	+ sizeof(*sinodep), &next_block,
	786	+ &next_offset))
	787	+ goto failed_read;
	788	+ SQUASHFS_SWAP_DIR_INODE_HEADER(inodep, sinodep);
	789	+ } else
	790	+ if (!squashfs_get_cached_block(s, (char *)
	791	+ inodep, block, offset,
	792	+ sizeof(*inodep), &next_block,
	793	+ &next_offset))
	794	+ goto failed_read;
	795	+
	796	+ if((i = squashfs_new_inode(s, inodeb)) == NULL)
	797	+ goto failed_read1;
	798	+
	799	+ i->i_nlink = inodep->nlink;
	800	+ i->i_size = inodep->file_size;
	801	+ i->i_op = &squashfs_dir_inode_ops;
	802	+ i->i_fop = &squashfs_dir_ops;
	803	+ i->i_mode \|= S_IFDIR;
	804	+ SQUASHFS_I(i)->start_block = inodep->start_block;
	805	+ SQUASHFS_I(i)->offset = inodep->offset;
	806	+ SQUASHFS_I(i)->u.s2.directory_index_count = 0;
	807	+ SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode;
	808	+
	809	+ TRACE("Directory inode %x:%x, start_block %x, offset "
	810	+ "%x\n", SQUASHFS_INODE_BLK(inode),
	811	+ offset, inodep->start_block,
	812	+ inodep->offset);
	813	+ break;
	814	+ }
	815	+ case SQUASHFS_LDIR_TYPE: {
	816	+ struct squashfs_ldir_inode_header *inodep = &id.ldir;
	817	+ struct squashfs_ldir_inode_header *sinodep = &sid.ldir;
	818	+
	819	+ if (msblk->swap) {
	820	+ if (!squashfs_get_cached_block(s, (char *)
	821	+ sinodep, block, offset,
	822	+ sizeof(*sinodep), &next_block,
	823	+ &next_offset))
	824	+ goto failed_read;
	825	+ SQUASHFS_SWAP_LDIR_INODE_HEADER(inodep,
	826	+ sinodep);
	827	+ } else
	828	+ if (!squashfs_get_cached_block(s, (char *)
	829	+ inodep, block, offset,
	830	+ sizeof(*inodep), &next_block,
	831	+ &next_offset))
	832	+ goto failed_read;
	833	+
	834	+ if((i = squashfs_new_inode(s, inodeb)) == NULL)
	835	+ goto failed_read1;
	836	+
	837	+ i->i_nlink = inodep->nlink;
	838	+ i->i_size = inodep->file_size;
	839	+ i->i_op = &squashfs_dir_inode_ops;
	840	+ i->i_fop = &squashfs_dir_ops;
	841	+ i->i_mode \|= S_IFDIR;
	842	+ SQUASHFS_I(i)->start_block = inodep->start_block;
	843	+ SQUASHFS_I(i)->offset = inodep->offset;
	844	+ SQUASHFS_I(i)->u.s2.directory_index_start = next_block;
	845	+ SQUASHFS_I(i)->u.s2.directory_index_offset =
	846	+ next_offset;
	847	+ SQUASHFS_I(i)->u.s2.directory_index_count =
	848	+ inodep->i_count;
	849	+ SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode;
	850	+
	851	+ TRACE("Long directory inode %x:%x, start_block %x, "
	852	+ "offset %x\n",
	853	+ SQUASHFS_INODE_BLK(inode), offset,
	854	+ inodep->start_block, inodep->offset);
	855	+ break;
	856	+ }
	857	+ case SQUASHFS_SYMLINK_TYPE: {
	858	+ struct squashfs_symlink_inode_header *inodep =
	859	+ &id.symlink;
	860	+ struct squashfs_symlink_inode_header *sinodep =
	861	+ &sid.symlink;
	862	+
	863	+ if (msblk->swap) {
	864	+ if (!squashfs_get_cached_block(s, (char *)
	865	+ sinodep, block, offset,
	866	+ sizeof(*sinodep), &next_block,
	867	+ &next_offset))
	868	+ goto failed_read;
	869	+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER(inodep,
	870	+ sinodep);
	871	+ } else
	872	+ if (!squashfs_get_cached_block(s, (char *)
	873	+ inodep, block, offset,
	874	+ sizeof(*inodep), &next_block,
	875	+ &next_offset))
	876	+ goto failed_read;
	877	+
	878	+ if((i = squashfs_new_inode(s, inodeb)) == NULL)
	879	+ goto failed_read1;
	880	+
	881	+ i->i_nlink = inodep->nlink;
	882	+ i->i_size = inodep->symlink_size;
	883	+ i->i_op = &page_symlink_inode_operations;
	884	+ i->i_data.a_ops = &squashfs_symlink_aops;
	885	+ i->i_mode \|= S_IFLNK;
	886	+ SQUASHFS_I(i)->start_block = next_block;
	887	+ SQUASHFS_I(i)->offset = next_offset;
	888	+
	889	+ TRACE("Symbolic link inode %x:%x, start_block %llx, "
	890	+ "offset %x\n",
	891	+ SQUASHFS_INODE_BLK(inode), offset,
	892	+ next_block, next_offset);
	893	+ break;
	894	+ }
	895	+ case SQUASHFS_BLKDEV_TYPE:
	896	+ case SQUASHFS_CHRDEV_TYPE: {
	897	+ struct squashfs_dev_inode_header *inodep = &id.dev;
	898	+ struct squashfs_dev_inode_header *sinodep = &sid.dev;
	899	+
	900	+ if (msblk->swap) {
	901	+ if (!squashfs_get_cached_block(s, (char *)
	902	+ sinodep, block, offset,
	903	+ sizeof(*sinodep), &next_block,
	904	+ &next_offset))
	905	+ goto failed_read;
	906	+ SQUASHFS_SWAP_DEV_INODE_HEADER(inodep, sinodep);
	907	+ } else
	908	+ if (!squashfs_get_cached_block(s, (char *)
	909	+ inodep, block, offset,
	910	+ sizeof(*inodep), &next_block,
	911	+ &next_offset))
	912	+ goto failed_read;
	913	+
	914	+ if ((i = squashfs_new_inode(s, inodeb)) == NULL)
	915	+ goto failed_read1;
	916	+
	917	+ i->i_nlink = inodep->nlink;
	918	+ i->i_mode \|= (inodeb->inode_type ==
	919	+ SQUASHFS_CHRDEV_TYPE) ? S_IFCHR :
	920	+ S_IFBLK;
	921	+ init_special_inode(i, i->i_mode,
	922	+ old_decode_dev(inodep->rdev));
	923	+
	924	+ TRACE("Device inode %x:%x, rdev %x\n",
	925	+ SQUASHFS_INODE_BLK(inode), offset,
	926	+ inodep->rdev);
	927	+ break;
	928	+ }
	929	+ case SQUASHFS_FIFO_TYPE:
	930	+ case SQUASHFS_SOCKET_TYPE: {
	931	+ struct squashfs_ipc_inode_header *inodep = &id.ipc;
	932	+ struct squashfs_ipc_inode_header *sinodep = &sid.ipc;
	933	+
	934	+ if (msblk->swap) {
	935	+ if (!squashfs_get_cached_block(s, (char *)
	936	+ sinodep, block, offset,
	937	+ sizeof(*sinodep), &next_block,
	938	+ &next_offset))
	939	+ goto failed_read;
	940	+ SQUASHFS_SWAP_IPC_INODE_HEADER(inodep, sinodep);
	941	+ } else
	942	+ if (!squashfs_get_cached_block(s, (char *)
	943	+ inodep, block, offset,
	944	+ sizeof(*inodep), &next_block,
	945	+ &next_offset))
	946	+ goto failed_read;
	947	+
	948	+ if ((i = squashfs_new_inode(s, inodeb)) == NULL)
	949	+ goto failed_read1;
	950	+
	951	+ i->i_nlink = inodep->nlink;
	952	+ i->i_mode \|= (inodeb->inode_type == SQUASHFS_FIFO_TYPE)
	953	+ ? S_IFIFO : S_IFSOCK;
	954	+ init_special_inode(i, i->i_mode, 0);
	955	+ break;
	956	+ }
	957	+ default:
	958	+ ERROR("Unknown inode type %d in squashfs_iget!\n",
	959	+ inodeb->inode_type);
	960	+ goto failed_read1;
	961	+ }
	962	+
	963	+ insert_inode_hash(i);
	964	+ return i;
	965	+
	966	+failed_read:
	967	+ ERROR("Unable to read inode [%llx:%x]\n", block, offset);
	968	+
	969	+failed_read1:
	970	+ return NULL;
	971	+}
	972	+
	973	+
	974	+static int read_fragment_index_table(struct super_block *s)
	975	+{
	976	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	977	+ struct squashfs_super_block *sblk = &msblk->sblk;
	978	+
	979	+ /* Allocate fragment index table */
	980	+ if (!(msblk->fragment_index = kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES
	981	+ (sblk->fragments), GFP_KERNEL))) {
	982	+ ERROR("Failed to allocate uid/gid table\n");
	983	+ return 0;
	984	+ }
	985	+
	986	+ if (SQUASHFS_FRAGMENT_INDEX_BYTES(sblk->fragments) &&
	987	+ !squashfs_read_data(s, (char *)
	988	+ msblk->fragment_index,
	989	+ sblk->fragment_table_start,
	990	+ SQUASHFS_FRAGMENT_INDEX_BYTES
	991	+ (sblk->fragments) \|
	992	+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL)) {
	993	+ ERROR("unable to read fragment index table\n");
	994	+ return 0;
	995	+ }
	996	+
	997	+ if (msblk->swap) {
	998	+ int i;
	999	+ long long fragment;
	1000	+
	1001	+ for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES(sblk->fragments);
	1002	+ i++) {
	1003	+ SQUASHFS_SWAP_FRAGMENT_INDEXES((&fragment),
	1004	+ &msblk->fragment_index[i], 1);
	1005	+ msblk->fragment_index[i] = fragment;
	1006	+ }
	1007	+ }
	1008	+
	1009	+ return 1;
	1010	+}
	1011	+
	1012	+
	1013	+static int supported_squashfs_filesystem(struct squashfs_sb_info *msblk, int silent)
	1014	+{
	1015	+ struct squashfs_super_block *sblk = &msblk->sblk;
	1016	+
	1017	+ msblk->iget = squashfs_iget;
	1018	+ msblk->read_blocklist = read_blocklist;
	1019	+ msblk->read_fragment_index_table = read_fragment_index_table;
	1020	+
	1021	+ if (sblk->s_major == 1) {
	1022	+ if (!squashfs_1_0_supported(msblk)) {
	1023	+ SERROR("Major/Minor mismatch, Squashfs 1.0 filesystems "
	1024	+ "are unsupported\n");
	1025	+ SERROR("Please recompile with "
	1026	+ "Squashfs 1.0 support enabled\n");
	1027	+ return 0;
	1028	+ }
	1029	+ } else if (sblk->s_major == 2) {
	1030	+ if (!squashfs_2_0_supported(msblk)) {
	1031	+ SERROR("Major/Minor mismatch, Squashfs 2.0 filesystems "
	1032	+ "are unsupported\n");
	1033	+ SERROR("Please recompile with "
	1034	+ "Squashfs 2.0 support enabled\n");
	1035	+ return 0;
	1036	+ }
	1037	+ } else if(sblk->s_major != SQUASHFS_MAJOR \|\| sblk->s_minor >
	1038	+ SQUASHFS_MINOR) {
	1039	+ SERROR("Major/Minor mismatch, trying to mount newer %d.%d "
	1040	+ "filesystem\n", sblk->s_major, sblk->s_minor);
	1041	+ SERROR("Please update your kernel\n");
	1042	+ return 0;
	1043	+ }
	1044	+
	1045	+ return 1;
	1046	+}
	1047	+
	1048	+
	1049	+static int squashfs_fill_super(struct super_block s, void data, int silent)
	1050	+{
	1051	+ struct squashfs_sb_info *msblk;
	1052	+ struct squashfs_super_block *sblk;
	1053	+ int i;
	1054	+ char b[BDEVNAME_SIZE];
	1055	+ struct inode *root;
	1056	+
	1057	+ TRACE("Entered squashfs_read_superblock\n");
	1058	+
	1059	+ if (!(s->s_fs_info = kmalloc(sizeof(struct squashfs_sb_info),
	1060	+ GFP_KERNEL))) {
	1061	+ ERROR("Failed to allocate superblock\n");
	1062	+ goto failure;
	1063	+ }
	1064	+ memset(s->s_fs_info, 0, sizeof(struct squashfs_sb_info));
	1065	+ msblk = s->s_fs_info;
	1066	+ if (!(msblk->stream.workspace = vmalloc(zlib_inflate_workspacesize()))) {
	1067	+ ERROR("Failed to allocate zlib workspace\n");
	1068	+ goto failure;
	1069	+ }
	1070	+ sblk = &msblk->sblk;
	1071	+
	1072	+ msblk->devblksize = sb_min_blocksize(s, BLOCK_SIZE);
	1073	+ msblk->devblksize_log2 = ffz(~msblk->devblksize);
	1074	+
	1075	+ init_MUTEX(&msblk->read_data_mutex);
	1076	+ init_MUTEX(&msblk->read_page_mutex);
	1077	+ init_MUTEX(&msblk->block_cache_mutex);
	1078	+ init_MUTEX(&msblk->fragment_mutex);
	1079	+ init_MUTEX(&msblk->meta_index_mutex);
	1080	+
	1081	+ init_waitqueue_head(&msblk->waitq);
	1082	+ init_waitqueue_head(&msblk->fragment_wait_queue);
	1083	+
	1084	+ if (!squashfs_read_data(s, (char *) sblk, SQUASHFS_START,
	1085	+ sizeof(struct squashfs_super_block) \|
	1086	+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL)) {
	1087	+ SERROR("unable to read superblock\n");
	1088	+ goto failed_mount;
	1089	+ }
	1090	+
	1091	+ /* Check it is a SQUASHFS superblock */
	1092	+ msblk->swap = 0;
	1093	+ if ((s->s_magic = sblk->s_magic) != SQUASHFS_MAGIC) {
	1094	+ if (sblk->s_magic == SQUASHFS_MAGIC_SWAP) {
	1095	+ struct squashfs_super_block ssblk;
	1096	+
	1097	+ WARNING("Mounting a different endian SQUASHFS "
	1098	+ "filesystem on %s\n", bdevname(s->s_bdev, b));
	1099	+
	1100	+ SQUASHFS_SWAP_SUPER_BLOCK(&ssblk, sblk);
	1101	+ memcpy(sblk, &ssblk, sizeof(struct squashfs_super_block));
	1102	+ msblk->swap = 1;
	1103	+ } else {
	1104	+ SERROR("Can't find a SQUASHFS superblock on %s\n",
	1105	+ bdevname(s->s_bdev, b));
	1106	+ goto failed_mount;
	1107	+ }
	1108	+ }
	1109	+
	1110	+ /* Check the MAJOR & MINOR versions */
	1111	+ if(!supported_squashfs_filesystem(msblk, silent))
	1112	+ goto failed_mount;
	1113	+
	1114	+ TRACE("Found valid superblock on %s\n", bdevname(s->s_bdev, b));
	1115	+ TRACE("Inodes are %scompressed\n",
	1116	+ SQUASHFS_UNCOMPRESSED_INODES
	1117	+ (sblk->flags) ? "un" : "");
	1118	+ TRACE("Data is %scompressed\n",
	1119	+ SQUASHFS_UNCOMPRESSED_DATA(sblk->flags)
	1120	+ ? "un" : "");
	1121	+ TRACE("Check data is %s present in the filesystem\n",
	1122	+ SQUASHFS_CHECK_DATA(sblk->flags) ?
	1123	+ "" : "not");
	1124	+ TRACE("Filesystem size %lld bytes\n", sblk->bytes_used);
	1125	+ TRACE("Block size %d\n", sblk->block_size);
	1126	+ TRACE("Number of inodes %d\n", sblk->inodes);
	1127	+ if (sblk->s_major > 1)
	1128	+ TRACE("Number of fragments %d\n", sblk->fragments);
	1129	+ TRACE("Number of uids %d\n", sblk->no_uids);
	1130	+ TRACE("Number of gids %d\n", sblk->no_guids);
	1131	+ TRACE("sblk->inode_table_start %llx\n", sblk->inode_table_start);
	1132	+ TRACE("sblk->directory_table_start %llx\n", sblk->directory_table_start);
	1133	+ if (sblk->s_major > 1)
	1134	+ TRACE("sblk->fragment_table_start %llx\n",
	1135	+ sblk->fragment_table_start);
	1136	+ TRACE("sblk->uid_start %llx\n", sblk->uid_start);
	1137	+
	1138	+ s->s_flags \|= MS_RDONLY;
	1139	+ s->s_op = &squashfs_ops;
	1140	+
	1141	+ /* Init inode_table block pointer array */
	1142	+ if (!(msblk->block_cache = kmalloc(sizeof(struct squashfs_cache) *
	1143	+ SQUASHFS_CACHED_BLKS, GFP_KERNEL))) {
	1144	+ ERROR("Failed to allocate block cache\n");
	1145	+ goto failed_mount;
	1146	+ }
	1147	+
	1148	+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++)
	1149	+ msblk->block_cache[i].block = SQUASHFS_INVALID_BLK;
	1150	+
	1151	+ msblk->next_cache = 0;
	1152	+
	1153	+ /* Allocate read_data block */
	1154	+ msblk->read_size = (sblk->block_size < SQUASHFS_METADATA_SIZE) ?
	1155	+ SQUASHFS_METADATA_SIZE :
	1156	+ sblk->block_size;
	1157	+
	1158	+ if (!(msblk->read_data = kmalloc(msblk->read_size, GFP_KERNEL))) {
	1159	+ ERROR("Failed to allocate read_data block\n");
	1160	+ goto failed_mount;
	1161	+ }
	1162	+
	1163	+ /* Allocate read_page block */
	1164	+ if (!(msblk->read_page = kmalloc(sblk->block_size, GFP_KERNEL))) {
	1165	+ ERROR("Failed to allocate read_page block\n");
	1166	+ goto failed_mount;
	1167	+ }
	1168	+
	1169	+ /* Allocate uid and gid tables */
	1170	+ if (!(msblk->uid = kmalloc((sblk->no_uids + sblk->no_guids) *
	1171	+ sizeof(unsigned int), GFP_KERNEL))) {
	1172	+ ERROR("Failed to allocate uid/gid table\n");
	1173	+ goto failed_mount;
	1174	+ }
	1175	+ msblk->guid = msblk->uid + sblk->no_uids;
	1176	+
	1177	+ if (msblk->swap) {
	1178	+ unsigned int suid[sblk->no_uids + sblk->no_guids];
	1179	+
	1180	+ if (!squashfs_read_data(s, (char *) &suid, sblk->uid_start,
	1181	+ ((sblk->no_uids + sblk->no_guids) *
	1182	+ sizeof(unsigned int)) \|
	1183	+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL)) {
	1184	+ ERROR("unable to read uid/gid table\n");
	1185	+ goto failed_mount;
	1186	+ }
	1187	+
	1188	+ SQUASHFS_SWAP_DATA(msblk->uid, suid, (sblk->no_uids +
	1189	+ sblk->no_guids), (sizeof(unsigned int) * 8));
	1190	+ } else
	1191	+ if (!squashfs_read_data(s, (char *) msblk->uid, sblk->uid_start,
	1192	+ ((sblk->no_uids + sblk->no_guids) *
	1193	+ sizeof(unsigned int)) \|
	1194	+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL)) {
	1195	+ ERROR("unable to read uid/gid table\n");
	1196	+ goto failed_mount;
	1197	+ }
	1198	+
	1199	+
	1200	+ if (sblk->s_major == 1 && squashfs_1_0_supported(msblk))
	1201	+ goto allocate_root;
	1202	+
	1203	+ if (!(msblk->fragment = kmalloc(sizeof(struct squashfs_fragment_cache) *
	1204	+ SQUASHFS_CACHED_FRAGMENTS, GFP_KERNEL))) {
	1205	+ ERROR("Failed to allocate fragment block cache\n");
	1206	+ goto failed_mount;
	1207	+ }
	1208	+
	1209	+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++) {
	1210	+ msblk->fragment[i].locked = 0;
	1211	+ msblk->fragment[i].block = SQUASHFS_INVALID_BLK;
	1212	+ msblk->fragment[i].data = NULL;
	1213	+ }
	1214	+
	1215	+ msblk->next_fragment = 0;
	1216	+
	1217	+ /* Allocate fragment index table */
	1218	+ if (msblk->read_fragment_index_table(s) == 0)
	1219	+ goto failed_mount;
	1220	+
	1221	+allocate_root:
	1222	+ if ((root = (msblk->iget)(s, sblk->root_inode)) == NULL)
	1223	+ goto failed_mount;
	1224	+
	1225	+ if ((s->s_root = d_alloc_root(root)) == NULL) {
	1226	+ ERROR("Root inode create failed\n");
	1227	+ iput(root);
	1228	+ goto failed_mount;
	1229	+ }
	1230	+
	1231	+ TRACE("Leaving squashfs_read_super\n");
	1232	+ return 0;
	1233	+
	1234	+failed_mount:
	1235	+ kfree(msblk->fragment_index);
	1236	+ kfree(msblk->fragment);
	1237	+ kfree(msblk->uid);
	1238	+ kfree(msblk->read_page);
	1239	+ kfree(msblk->read_data);
	1240	+ kfree(msblk->block_cache);
	1241	+ kfree(msblk->fragment_index_2);
	1242	+ vfree(msblk->stream.workspace);
	1243	+ kfree(s->s_fs_info);
	1244	+ s->s_fs_info = NULL;
	1245	+ return -EINVAL;
	1246	+
	1247	+failure:
	1248	+ return -ENOMEM;
	1249	+}
	1250	+
	1251	+
	1252	+static int squashfs_statfs(struct dentry dentry, struct kstatfs buf)
	1253	+{
	1254	+ struct squashfs_sb_info *msblk = dentry->d_sb->s_fs_info;
	1255	+ struct squashfs_super_block *sblk = &msblk->sblk;
	1256	+
	1257	+ TRACE("Entered squashfs_statfs\n");
	1258	+
	1259	+ buf->f_type = SQUASHFS_MAGIC;
	1260	+ buf->f_bsize = sblk->block_size;
	1261	+ buf->f_blocks = ((sblk->bytes_used - 1) >> sblk->block_log) + 1;
	1262	+ buf->f_bfree = buf->f_bavail = 0;
	1263	+ buf->f_files = sblk->inodes;
	1264	+ buf->f_ffree = 0;
	1265	+ buf->f_namelen = SQUASHFS_NAME_LEN;
	1266	+
	1267	+ return 0;
	1268	+}
	1269	+
	1270	+
	1271	+static int squashfs_symlink_readpage(struct file file, struct page page)
	1272	+{
	1273	+ struct inode *inode = page->mapping->host;
	1274	+ int index = page->index << PAGE_CACHE_SHIFT, length, bytes;
	1275	+ long long block = SQUASHFS_I(inode)->start_block;
	1276	+ int offset = SQUASHFS_I(inode)->offset;
	1277	+ void *pageaddr = kmap(page);
	1278	+
	1279	+ TRACE("Entered squashfs_symlink_readpage, page index %ld, start block "
	1280	+ "%llx, offset %x\n", page->index,
	1281	+ SQUASHFS_I(inode)->start_block,
	1282	+ SQUASHFS_I(inode)->offset);
	1283	+
	1284	+ for (length = 0; length < index; length += bytes) {
	1285	+ if (!(bytes = squashfs_get_cached_block(inode->i_sb, NULL,
	1286	+ block, offset, PAGE_CACHE_SIZE, &block,
	1287	+ &offset))) {
	1288	+ ERROR("Unable to read symbolic link [%llx:%x]\n", block,
	1289	+ offset);
	1290	+ goto skip_read;
	1291	+ }
	1292	+ }
	1293	+
	1294	+ if (length != index) {
	1295	+ ERROR("(squashfs_symlink_readpage) length != index\n");
	1296	+ bytes = 0;
	1297	+ goto skip_read;
	1298	+ }
	1299	+
	1300	+ bytes = (i_size_read(inode) - length) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE :
	1301	+ i_size_read(inode) - length;
	1302	+
	1303	+ if (!(bytes = squashfs_get_cached_block(inode->i_sb, pageaddr, block,
	1304	+ offset, bytes, &block, &offset)))
	1305	+ ERROR("Unable to read symbolic link [%llx:%x]\n", block, offset);
	1306	+
	1307	+skip_read:
	1308	+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
	1309	+ kunmap(page);
	1310	+ SetPageUptodate(page);
	1311	+ unlock_page(page);
	1312	+
	1313	+ return 0;
	1314	+}
	1315	+
	1316	+
	1317	+struct meta_index locate_meta_index(struct inode inode, int index, int offset)
	1318	+{
	1319	+ struct meta_index *meta = NULL;
	1320	+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
	1321	+ int i;
	1322	+
	1323	+ down(&msblk->meta_index_mutex);
	1324	+
	1325	+ TRACE("locate_meta_index: index %d, offset %d\n", index, offset);
	1326	+
	1327	+ if(msblk->meta_index == NULL)
	1328	+ goto not_allocated;
	1329	+
	1330	+ for (i = 0; i < SQUASHFS_META_NUMBER; i ++)
	1331	+ if (msblk->meta_index[i].inode_number == inode->i_ino &&
	1332	+ msblk->meta_index[i].offset >= offset &&
	1333	+ msblk->meta_index[i].offset <= index &&
	1334	+ msblk->meta_index[i].locked == 0) {
	1335	+ TRACE("locate_meta_index: entry %d, offset %d\n", i,
	1336	+ msblk->meta_index[i].offset);
	1337	+ meta = &msblk->meta_index[i];
	1338	+ offset = meta->offset;
	1339	+ }
	1340	+
	1341	+ if (meta)
	1342	+ meta->locked = 1;
	1343	+
	1344	+not_allocated:
	1345	+ up(&msblk->meta_index_mutex);
	1346	+
	1347	+ return meta;
	1348	+}
	1349	+
	1350	+
	1351	+struct meta_index empty_meta_index(struct inode inode, int offset, int skip)
	1352	+{
	1353	+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
	1354	+ struct meta_index *meta = NULL;
	1355	+ int i;
	1356	+
	1357	+ down(&msblk->meta_index_mutex);
	1358	+
	1359	+ TRACE("empty_meta_index: offset %d, skip %d\n", offset, skip);
	1360	+
	1361	+ if(msblk->meta_index == NULL) {
	1362	+ if (!(msblk->meta_index = kmalloc(sizeof(struct meta_index) *
	1363	+ SQUASHFS_META_NUMBER, GFP_KERNEL))) {
	1364	+ ERROR("Failed to allocate meta_index\n");
	1365	+ goto failed;
	1366	+ }
	1367	+ for(i = 0; i < SQUASHFS_META_NUMBER; i++) {
	1368	+ msblk->meta_index[i].inode_number = 0;
	1369	+ msblk->meta_index[i].locked = 0;
	1370	+ }
	1371	+ msblk->next_meta_index = 0;
	1372	+ }
	1373	+
	1374	+ for(i = SQUASHFS_META_NUMBER; i &&
	1375	+ msblk->meta_index[msblk->next_meta_index].locked; i --)
	1376	+ msblk->next_meta_index = (msblk->next_meta_index + 1) %
	1377	+ SQUASHFS_META_NUMBER;
	1378	+
	1379	+ if(i == 0) {
	1380	+ TRACE("empty_meta_index: failed!\n");
	1381	+ goto failed;
	1382	+ }
	1383	+
	1384	+ TRACE("empty_meta_index: returned meta entry %d, %p\n",
	1385	+ msblk->next_meta_index,
	1386	+ &msblk->meta_index[msblk->next_meta_index]);
	1387	+
	1388	+ meta = &msblk->meta_index[msblk->next_meta_index];
	1389	+ msblk->next_meta_index = (msblk->next_meta_index + 1) %
	1390	+ SQUASHFS_META_NUMBER;
	1391	+
	1392	+ meta->inode_number = inode->i_ino;
	1393	+ meta->offset = offset;
	1394	+ meta->skip = skip;
	1395	+ meta->entries = 0;
	1396	+ meta->locked = 1;
	1397	+
	1398	+failed:
	1399	+ up(&msblk->meta_index_mutex);
	1400	+ return meta;
	1401	+}
	1402	+
	1403	+
	1404	+void release_meta_index(struct inode inode, struct meta_index meta)
	1405	+{
	1406	+ meta->locked = 0;
	1407	+}
	1408	+
	1409	+
	1410	+static int read_block_index(struct super_block s, int blocks, char block_list,
	1411	+ long long start_block, int offset)
	1412	+{
	1413	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	1414	+ unsigned int *block_listp;
	1415	+ int block = 0;
	1416	+
	1417	+ if (msblk->swap) {
	1418	+ char sblock_list[blocks << 2];
	1419	+
	1420	+ if (!squashfs_get_cached_block(s, sblock_list, *start_block,
	1421	+ *offset, blocks << 2, start_block, offset)) {
	1422	+ ERROR("Unable to read block list [%llx:%x]\n",
	1423	+ start_block, offset);
	1424	+ goto failure;
	1425	+ }
	1426	+ SQUASHFS_SWAP_INTS(((unsigned int *)block_list),
	1427	+ ((unsigned int *)sblock_list), blocks);
	1428	+ } else
	1429	+ if (!squashfs_get_cached_block(s, block_list, *start_block,
	1430	+ *offset, blocks << 2, start_block, offset)) {
	1431	+ ERROR("Unable to read block list [%llx:%x]\n",
	1432	+ start_block, offset);
	1433	+ goto failure;
	1434	+ }
	1435	+
	1436	+ for (block_listp = (unsigned int *) block_list; blocks;
	1437	+ block_listp++, blocks --)
	1438	+ block += SQUASHFS_COMPRESSED_SIZE_BLOCK(*block_listp);
	1439	+
	1440	+ return block;
	1441	+
	1442	+failure:
	1443	+ return -1;
	1444	+}
	1445	+
	1446	+
	1447	+#define SIZE 256
	1448	+
	1449	+static inline int calculate_skip(int blocks) {
	1450	+ int skip = (blocks - 1) / ((SQUASHFS_SLOTS * SQUASHFS_META_ENTRIES + 1) * SQUASHFS_META_INDEXES);
	1451	+ return skip >= 7 ? 7 : skip + 1;
	1452	+}
	1453	+
	1454	+
	1455	+static int get_meta_index(struct inode *inode, int index,
	1456	+ long long index_block, int index_offset,
	1457	+ long long data_block, char block_list)
	1458	+{
	1459	+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
	1460	+ struct squashfs_super_block *sblk = &msblk->sblk;
	1461	+ int skip = calculate_skip(i_size_read(inode) >> sblk->block_log);
	1462	+ int offset = 0;
	1463	+ struct meta_index *meta;
	1464	+ struct meta_entry *meta_entry;
	1465	+ long long cur_index_block = SQUASHFS_I(inode)->u.s1.block_list_start;
	1466	+ int cur_offset = SQUASHFS_I(inode)->offset;
	1467	+ long long cur_data_block = SQUASHFS_I(inode)->start_block;
	1468	+ int i;
	1469	+
	1470	+ index /= SQUASHFS_META_INDEXES * skip;
	1471	+
	1472	+ while ( offset < index ) {
	1473	+ meta = locate_meta_index(inode, index, offset + 1);
	1474	+
	1475	+ if (meta == NULL) {
	1476	+ if ((meta = empty_meta_index(inode, offset + 1,
	1477	+ skip)) == NULL)
	1478	+ goto all_done;
	1479	+ } else {
	1480	+ offset = index < meta->offset + meta->entries ? index :
	1481	+ meta->offset + meta->entries - 1;
	1482	+ meta_entry = &meta->meta_entry[offset - meta->offset];
	1483	+ cur_index_block = meta_entry->index_block + sblk->inode_table_start;
	1484	+ cur_offset = meta_entry->offset;
	1485	+ cur_data_block = meta_entry->data_block;
	1486	+ TRACE("get_meta_index: offset %d, meta->offset %d, "
	1487	+ "meta->entries %d\n", offset, meta->offset,
	1488	+ meta->entries);
	1489	+ TRACE("get_meta_index: index_block 0x%llx, offset 0x%x"
	1490	+ " data_block 0x%llx\n", cur_index_block,
	1491	+ cur_offset, cur_data_block);
	1492	+ }
	1493	+
	1494	+ for (i = meta->offset + meta->entries; i <= index &&
	1495	+ i < meta->offset + SQUASHFS_META_ENTRIES; i++) {
	1496	+ int blocks = skip * SQUASHFS_META_INDEXES;
	1497	+
	1498	+ while (blocks) {
	1499	+ int block = blocks > (SIZE >> 2) ? (SIZE >> 2) :
	1500	+ blocks;
	1501	+ int res = read_block_index(inode->i_sb, block,
	1502	+ block_list, &cur_index_block,
	1503	+ &cur_offset);
	1504	+
	1505	+ if (res == -1)
	1506	+ goto failed;
	1507	+
	1508	+ cur_data_block += res;
	1509	+ blocks -= block;
	1510	+ }
	1511	+
	1512	+ meta_entry = &meta->meta_entry[i - meta->offset];
	1513	+ meta_entry->index_block = cur_index_block - sblk->inode_table_start;
	1514	+ meta_entry->offset = cur_offset;
	1515	+ meta_entry->data_block = cur_data_block;
	1516	+ meta->entries ++;
	1517	+ offset ++;
	1518	+ }
	1519	+
	1520	+ TRACE("get_meta_index: meta->offset %d, meta->entries %d\n",
	1521	+ meta->offset, meta->entries);
	1522	+
	1523	+ release_meta_index(inode, meta);
	1524	+ }
	1525	+
	1526	+all_done:
	1527	+ *index_block = cur_index_block;
	1528	+ *index_offset = cur_offset;
	1529	+ *data_block = cur_data_block;
	1530	+
	1531	+ return offset * SQUASHFS_META_INDEXES * skip;
	1532	+
	1533	+failed:
	1534	+ release_meta_index(inode, meta);
	1535	+ return -1;
	1536	+}
	1537	+
	1538	+
	1539	+static long long read_blocklist(struct inode *inode, int index,
	1540	+ int readahead_blks, char *block_list,
	1541	+ unsigned short *block_p, unsigned int bsize)
	1542	+{
	1543	+ long long block_ptr;
	1544	+ int offset;
	1545	+ long long block;
	1546	+ int res = get_meta_index(inode, index, &block_ptr, &offset, &block,
	1547	+ block_list);
	1548	+
	1549	+ TRACE("read_blocklist: res %d, index %d, block_ptr 0x%llx, offset"
	1550	+ " 0x%x, block 0x%llx\n", res, index, block_ptr, offset,
	1551	+ block);
	1552	+
	1553	+ if(res == -1)
	1554	+ goto failure;
	1555	+
	1556	+ index -= res;
	1557	+
	1558	+ while ( index ) {
	1559	+ int blocks = index > (SIZE >> 2) ? (SIZE >> 2) : index;
	1560	+ int res = read_block_index(inode->i_sb, blocks, block_list,
	1561	+ &block_ptr, &offset);
	1562	+ if (res == -1)
	1563	+ goto failure;
	1564	+ block += res;
	1565	+ index -= blocks;
	1566	+ }
	1567	+
	1568	+ if (read_block_index(inode->i_sb, 1, block_list,
	1569	+ &block_ptr, &offset) == -1)
	1570	+ goto failure;
	1571	+ bsize = ((unsigned int *) block_list);
	1572	+
	1573	+ return block;
	1574	+
	1575	+failure:
	1576	+ return 0;
	1577	+}
	1578	+
	1579	+
	1580	+static int squashfs_readpage(struct file file, struct page page)
	1581	+{
	1582	+ struct inode *inode = page->mapping->host;
	1583	+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
	1584	+ struct squashfs_super_block *sblk = &msblk->sblk;
	1585	+ unsigned char *block_list;
	1586	+ long long block;
	1587	+ unsigned int bsize, i = 0, bytes = 0, byte_offset = 0;
	1588	+ int index = page->index >> (sblk->block_log - PAGE_CACHE_SHIFT);
	1589	+ void *pageaddr;
	1590	+ struct squashfs_fragment_cache *fragment = NULL;
	1591	+ char *data_ptr = msblk->read_page;
	1592	+
	1593	+ int mask = (1 << (sblk->block_log - PAGE_CACHE_SHIFT)) - 1;
	1594	+ int start_index = page->index & ~mask;
	1595	+ int end_index = start_index \| mask;
	1596	+
	1597	+ TRACE("Entered squashfs_readpage, page index %lx, start block %llx\n",
	1598	+ page->index,
	1599	+ SQUASHFS_I(inode)->start_block);
	1600	+
	1601	+ if (!(block_list = kmalloc(SIZE, GFP_KERNEL))) {
	1602	+ ERROR("Failed to allocate block_list\n");
	1603	+ goto skip_read;
	1604	+ }
	1605	+
	1606	+ if (page->index >= ((i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
	1607	+ PAGE_CACHE_SHIFT))
	1608	+ goto skip_read;
	1609	+
	1610	+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
	1611	+ \|\| index < (i_size_read(inode) >>
	1612	+ sblk->block_log)) {
	1613	+ if ((block = (msblk->read_blocklist)(inode, index, 1,
	1614	+ block_list, NULL, &bsize)) == 0)
	1615	+ goto skip_read;
	1616	+
	1617	+ down(&msblk->read_page_mutex);
	1618	+
	1619	+ if (!(bytes = squashfs_read_data(inode->i_sb, msblk->read_page,
	1620	+ block, bsize, NULL))) {
	1621	+ ERROR("Unable to read page, block %llx, size %x\n", block,
	1622	+ bsize);
	1623	+ up(&msblk->read_page_mutex);
	1624	+ goto skip_read;
	1625	+ }
	1626	+ } else {
	1627	+ if ((fragment = get_cached_fragment(inode->i_sb,
	1628	+ SQUASHFS_I(inode)->
	1629	+ u.s1.fragment_start_block,
	1630	+ SQUASHFS_I(inode)->u.s1.fragment_size))
	1631	+ == NULL) {
	1632	+ ERROR("Unable to read page, block %llx, size %x\n",
	1633	+ SQUASHFS_I(inode)->
	1634	+ u.s1.fragment_start_block,
	1635	+ (int) SQUASHFS_I(inode)->
	1636	+ u.s1.fragment_size);
	1637	+ goto skip_read;
	1638	+ }
	1639	+ bytes = SQUASHFS_I(inode)->u.s1.fragment_offset +
	1640	+ (i_size_read(inode) & (sblk->block_size
	1641	+ - 1));
	1642	+ byte_offset = SQUASHFS_I(inode)->u.s1.fragment_offset;
	1643	+ data_ptr = fragment->data;
	1644	+ }
	1645	+
	1646	+ for (i = start_index; i <= end_index && byte_offset < bytes;
	1647	+ i++, byte_offset += PAGE_CACHE_SIZE) {
	1648	+ struct page *push_page;
	1649	+ int available_bytes = (bytes - byte_offset) > PAGE_CACHE_SIZE ?
	1650	+ PAGE_CACHE_SIZE : bytes - byte_offset;
	1651	+
	1652	+ TRACE("bytes %d, i %d, byte_offset %d, available_bytes %d\n",
	1653	+ bytes, i, byte_offset, available_bytes);
	1654	+
	1655	+ if (i == page->index) {
	1656	+ pageaddr = kmap_atomic(page, KM_USER0);
	1657	+ memcpy(pageaddr, data_ptr + byte_offset,
	1658	+ available_bytes);
	1659	+ memset(pageaddr + available_bytes, 0,
	1660	+ PAGE_CACHE_SIZE - available_bytes);
	1661	+ kunmap_atomic(pageaddr, KM_USER0);
	1662	+ flush_dcache_page(page);
	1663	+ SetPageUptodate(page);
	1664	+ unlock_page(page);
	1665	+ } else if ((push_page =
	1666	+ grab_cache_page_nowait(page->mapping, i))) {
	1667	+ pageaddr = kmap_atomic(push_page, KM_USER0);
	1668	+
	1669	+ memcpy(pageaddr, data_ptr + byte_offset,
	1670	+ available_bytes);
	1671	+ memset(pageaddr + available_bytes, 0,
	1672	+ PAGE_CACHE_SIZE - available_bytes);
	1673	+ kunmap_atomic(pageaddr, KM_USER0);
	1674	+ flush_dcache_page(push_page);
	1675	+ SetPageUptodate(push_page);
	1676	+ unlock_page(push_page);
	1677	+ page_cache_release(push_page);
	1678	+ }
	1679	+ }
	1680	+
	1681	+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
	1682	+ \|\| index < (i_size_read(inode) >>
	1683	+ sblk->block_log))
	1684	+ up(&msblk->read_page_mutex);
	1685	+ else
	1686	+ release_cached_fragment(msblk, fragment);
	1687	+
	1688	+ kfree(block_list);
	1689	+ return 0;
	1690	+
	1691	+skip_read:
	1692	+ pageaddr = kmap_atomic(page, KM_USER0);
	1693	+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
	1694	+ kunmap_atomic(pageaddr, KM_USER0);
	1695	+ flush_dcache_page(page);
	1696	+ SetPageUptodate(page);
	1697	+ unlock_page(page);
	1698	+
	1699	+ kfree(block_list);
	1700	+ return 0;
	1701	+}
	1702	+
	1703	+
	1704	+static int squashfs_readpage4K(struct file file, struct page page)
	1705	+{
	1706	+ struct inode *inode = page->mapping->host;
	1707	+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info;
	1708	+ struct squashfs_super_block *sblk = &msblk->sblk;
	1709	+ unsigned char *block_list;
	1710	+ long long block;
	1711	+ unsigned int bsize, bytes = 0;
	1712	+ void *pageaddr;
	1713	+
	1714	+ TRACE("Entered squashfs_readpage4K, page index %lx, start block %llx\n",
	1715	+ page->index,
	1716	+ SQUASHFS_I(inode)->start_block);
	1717	+
	1718	+ if (page->index >= ((i_size_read(inode) + PAGE_CACHE_SIZE - 1) >>
	1719	+ PAGE_CACHE_SHIFT)) {
	1720	+ pageaddr = kmap_atomic(page, KM_USER0);
	1721	+ block_list = NULL;
	1722	+ goto skip_read;
	1723	+ }
	1724	+
	1725	+ if (!(block_list = kmalloc(SIZE, GFP_KERNEL))) {
	1726	+ ERROR("Failed to allocate block_list\n");
	1727	+ pageaddr = kmap_atomic(page, KM_USER0);
	1728	+ block_list = NULL;
	1729	+ goto skip_read;
	1730	+ }
	1731	+
	1732	+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK
	1733	+ \|\| page->index < (i_size_read(inode) >>
	1734	+ sblk->block_log)) {
	1735	+ block = (msblk->read_blocklist)(inode, page->index, 1,
	1736	+ block_list, NULL, &bsize);
	1737	+
	1738	+ down(&msblk->read_page_mutex);
	1739	+ bytes = squashfs_read_data(inode->i_sb, msblk->read_page, block,
	1740	+ bsize, NULL);
	1741	+ pageaddr = kmap_atomic(page, KM_USER0);
	1742	+ if (bytes)
	1743	+ memcpy(pageaddr, msblk->read_page, bytes);
	1744	+ else
	1745	+ ERROR("Unable to read page, block %llx, size %x\n",
	1746	+ block, bsize);
	1747	+ up(&msblk->read_page_mutex);
	1748	+ } else {
	1749	+ struct squashfs_fragment_cache *fragment =
	1750	+ get_cached_fragment(inode->i_sb,
	1751	+ SQUASHFS_I(inode)->
	1752	+ u.s1.fragment_start_block,
	1753	+ SQUASHFS_I(inode)-> u.s1.fragment_size);
	1754	+ pageaddr = kmap_atomic(page, KM_USER0);
	1755	+ if (fragment) {
	1756	+ bytes = i_size_read(inode) & (sblk->block_size - 1);
	1757	+ memcpy(pageaddr, fragment->data + SQUASHFS_I(inode)->
	1758	+ u.s1.fragment_offset, bytes);
	1759	+ release_cached_fragment(msblk, fragment);
	1760	+ } else
	1761	+ ERROR("Unable to read page, block %llx, size %x\n",
	1762	+ SQUASHFS_I(inode)->
	1763	+ u.s1.fragment_start_block, (int)
	1764	+ SQUASHFS_I(inode)-> u.s1.fragment_size);
	1765	+ }
	1766	+
	1767	+skip_read:
	1768	+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
	1769	+ kunmap_atomic(pageaddr, KM_USER0);
	1770	+ flush_dcache_page(page);
	1771	+ SetPageUptodate(page);
	1772	+ unlock_page(page);
	1773	+
	1774	+ kfree(block_list);
	1775	+ return 0;
	1776	+}
	1777	+
	1778	+
	1779	+static int get_dir_index_using_offset(struct super_block *s, long long
	1780	+ next_block, unsigned int next_offset,
	1781	+ long long index_start,
	1782	+ unsigned int index_offset, int i_count,
	1783	+ long long f_pos)
	1784	+{
	1785	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	1786	+ struct squashfs_super_block *sblk = &msblk->sblk;
	1787	+ int i, length = 0;
	1788	+ struct squashfs_dir_index index;
	1789	+
	1790	+ TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n",
	1791	+ i_count, (unsigned int) f_pos);
	1792	+
	1793	+ f_pos =- 3;
	1794	+ if (f_pos == 0)
	1795	+ goto finish;
	1796	+
	1797	+ for (i = 0; i < i_count; i++) {
	1798	+ if (msblk->swap) {
	1799	+ struct squashfs_dir_index sindex;
	1800	+ squashfs_get_cached_block(s, (char *) &sindex,
	1801	+ index_start, index_offset,
	1802	+ sizeof(sindex), &index_start,
	1803	+ &index_offset);
	1804	+ SQUASHFS_SWAP_DIR_INDEX(&index, &sindex);
	1805	+ } else
	1806	+ squashfs_get_cached_block(s, (char *) &index,
	1807	+ index_start, index_offset,
	1808	+ sizeof(index), &index_start,
	1809	+ &index_offset);
	1810	+
	1811	+ if (index.index > f_pos)
	1812	+ break;
	1813	+
	1814	+ squashfs_get_cached_block(s, NULL, index_start, index_offset,
	1815	+ index.size + 1, &index_start,
	1816	+ &index_offset);
	1817	+
	1818	+ length = index.index;
	1819	+ *next_block = index.start_block + sblk->directory_table_start;
	1820	+ }
	1821	+
	1822	+ next_offset = (length + next_offset) % SQUASHFS_METADATA_SIZE;
	1823	+
	1824	+finish:
	1825	+ return length + 3;
	1826	+}
	1827	+
	1828	+
	1829	+static int get_dir_index_using_name(struct super_block *s, long long
	1830	+ next_block, unsigned int next_offset,
	1831	+ long long index_start,
	1832	+ unsigned int index_offset, int i_count,
	1833	+ const char *name, int size)
	1834	+{
	1835	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	1836	+ struct squashfs_super_block *sblk = &msblk->sblk;
	1837	+ int i, length = 0;
	1838	+ struct squashfs_dir_index *index;
	1839	+ char *str;
	1840	+
	1841	+ TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
	1842	+
	1843	+ if (!(str = kmalloc(sizeof(struct squashfs_dir_index) +
	1844	+ (SQUASHFS_NAME_LEN + 1) * 2, GFP_KERNEL))) {
	1845	+ ERROR("Failed to allocate squashfs_dir_index\n");
	1846	+ goto failure;
	1847	+ }
	1848	+
	1849	+ index = (struct squashfs_dir_index *) (str + SQUASHFS_NAME_LEN + 1);
	1850	+ strncpy(str, name, size);
	1851	+ str[size] = '\0';
	1852	+
	1853	+ for (i = 0; i < i_count; i++) {
	1854	+ if (msblk->swap) {
	1855	+ struct squashfs_dir_index sindex;
	1856	+ squashfs_get_cached_block(s, (char *) &sindex,
	1857	+ index_start, index_offset,
	1858	+ sizeof(sindex), &index_start,
	1859	+ &index_offset);
	1860	+ SQUASHFS_SWAP_DIR_INDEX(index, &sindex);
	1861	+ } else
	1862	+ squashfs_get_cached_block(s, (char *) index,
	1863	+ index_start, index_offset,
	1864	+ sizeof(struct squashfs_dir_index),
	1865	+ &index_start, &index_offset);
	1866	+
	1867	+ squashfs_get_cached_block(s, index->name, index_start,
	1868	+ index_offset, index->size + 1,
	1869	+ &index_start, &index_offset);
	1870	+
	1871	+ index->name[index->size + 1] = '\0';
	1872	+
	1873	+ if (strcmp(index->name, str) > 0)
	1874	+ break;
	1875	+
	1876	+ length = index->index;
	1877	+ *next_block = index->start_block + sblk->directory_table_start;
	1878	+ }
	1879	+
	1880	+ next_offset = (length + next_offset) % SQUASHFS_METADATA_SIZE;
	1881	+ kfree(str);
	1882	+failure:
	1883	+ return length + 3;
	1884	+}
	1885	+
	1886	+
	1887	+static int squashfs_readdir(struct file file, void dirent, filldir_t filldir)
	1888	+{
	1889	+ struct inode *i = file->f_dentry->d_inode;
	1890	+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
	1891	+ struct squashfs_super_block *sblk = &msblk->sblk;
	1892	+ long long next_block = SQUASHFS_I(i)->start_block +
	1893	+ sblk->directory_table_start;
	1894	+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
	1895	+ dir_count;
	1896	+ struct squashfs_dir_header dirh;
	1897	+ struct squashfs_dir_entry *dire;
	1898	+
	1899	+ TRACE("Entered squashfs_readdir [%llx:%x]\n", next_block, next_offset);
	1900	+
	1901	+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
	1902	+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
	1903	+ ERROR("Failed to allocate squashfs_dir_entry\n");
	1904	+ goto finish;
	1905	+ }
	1906	+
	1907	+ while(file->f_pos < 3) {
	1908	+ char *name;
	1909	+ int size, i_ino;
	1910	+
	1911	+ if(file->f_pos == 0) {
	1912	+ name = ".";
	1913	+ size = 1;
	1914	+ i_ino = i->i_ino;
	1915	+ } else {
	1916	+ name = "..";
	1917	+ size = 2;
	1918	+ i_ino = SQUASHFS_I(i)->u.s2.parent_inode;
	1919	+ }
	1920	+ TRACE("Calling filldir(%x, %s, %d, %d, %d, %d)\n",
	1921	+ (unsigned int) dirent, name, size, (int)
	1922	+ file->f_pos, i_ino,
	1923	+ squashfs_filetype_table[1]);
	1924	+
	1925	+ if (filldir(dirent, name, size,
	1926	+ file->f_pos, i_ino,
	1927	+ squashfs_filetype_table[1]) < 0) {
	1928	+ TRACE("Filldir returned less than 0\n");
	1929	+ goto finish;
	1930	+ }
	1931	+ file->f_pos += size;
	1932	+ }
	1933	+
	1934	+ length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset,
	1935	+ SQUASHFS_I(i)->u.s2.directory_index_start,
	1936	+ SQUASHFS_I(i)->u.s2.directory_index_offset,
	1937	+ SQUASHFS_I(i)->u.s2.directory_index_count,
	1938	+ file->f_pos);
	1939	+
	1940	+ while (length < i_size_read(i)) {
	1941	+ /* read directory header */
	1942	+ if (msblk->swap) {
	1943	+ struct squashfs_dir_header sdirh;
	1944	+
	1945	+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
	1946	+ next_block, next_offset, sizeof(sdirh),
	1947	+ &next_block, &next_offset))
	1948	+ goto failed_read;
	1949	+
	1950	+ length += sizeof(sdirh);
	1951	+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
	1952	+ } else {
	1953	+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
	1954	+ next_block, next_offset, sizeof(dirh),
	1955	+ &next_block, &next_offset))
	1956	+ goto failed_read;
	1957	+
	1958	+ length += sizeof(dirh);
	1959	+ }
	1960	+
	1961	+ dir_count = dirh.count + 1;
	1962	+ while (dir_count--) {
	1963	+ if (msblk->swap) {
	1964	+ struct squashfs_dir_entry sdire;
	1965	+ if (!squashfs_get_cached_block(i->i_sb, (char *)
	1966	+ &sdire, next_block, next_offset,
	1967	+ sizeof(sdire), &next_block,
	1968	+ &next_offset))
	1969	+ goto failed_read;
	1970	+
	1971	+ length += sizeof(sdire);
	1972	+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
	1973	+ } else {
	1974	+ if (!squashfs_get_cached_block(i->i_sb, (char *)
	1975	+ dire, next_block, next_offset,
	1976	+ sizeof(*dire), &next_block,
	1977	+ &next_offset))
	1978	+ goto failed_read;
	1979	+
	1980	+ length += sizeof(*dire);
	1981	+ }
	1982	+
	1983	+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
	1984	+ next_block, next_offset,
	1985	+ dire->size + 1, &next_block,
	1986	+ &next_offset))
	1987	+ goto failed_read;
	1988	+
	1989	+ length += dire->size + 1;
	1990	+
	1991	+ if (file->f_pos >= length)
	1992	+ continue;
	1993	+
	1994	+ dire->name[dire->size + 1] = '\0';
	1995	+
	1996	+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d, %d)\n",
	1997	+ (unsigned int) dirent, dire->name,
	1998	+ dire->size + 1, (int) file->f_pos,
	1999	+ dirh.start_block, dire->offset,
	2000	+ dirh.inode_number + dire->inode_number,
	2001	+ squashfs_filetype_table[dire->type]);
	2002	+
	2003	+ if (filldir(dirent, dire->name, dire->size + 1,
	2004	+ file->f_pos,
	2005	+ dirh.inode_number + dire->inode_number,
	2006	+ squashfs_filetype_table[dire->type])
	2007	+ < 0) {
	2008	+ TRACE("Filldir returned less than 0\n");
	2009	+ goto finish;
	2010	+ }
	2011	+ file->f_pos = length;
	2012	+ }
	2013	+ }
	2014	+
	2015	+finish:
	2016	+ kfree(dire);
	2017	+ return 0;
	2018	+
	2019	+failed_read:
	2020	+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
	2021	+ next_offset);
	2022	+ return 0;
	2023	+}
	2024	+
	2025	+
	2026	+static struct dentry squashfs_lookup(struct inode i, struct dentry *dentry,
	2027	+ struct nameidata *nd)
	2028	+{
	2029	+ const unsigned char *name = dentry->d_name.name;
	2030	+ int len = dentry->d_name.len;
	2031	+ struct inode *inode = NULL;
	2032	+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
	2033	+ struct squashfs_super_block *sblk = &msblk->sblk;
	2034	+ long long next_block = SQUASHFS_I(i)->start_block +
	2035	+ sblk->directory_table_start;
	2036	+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
	2037	+ dir_count;
	2038	+ struct squashfs_dir_header dirh;
	2039	+ struct squashfs_dir_entry *dire;
	2040	+
	2041	+ TRACE("Entered squashfs_lookup [%llx:%x]\n", next_block, next_offset);
	2042	+
	2043	+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
	2044	+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
	2045	+ ERROR("Failed to allocate squashfs_dir_entry\n");
	2046	+ goto exit_loop;
	2047	+ }
	2048	+
	2049	+ if (len > SQUASHFS_NAME_LEN)
	2050	+ goto exit_loop;
	2051	+
	2052	+ length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset,
	2053	+ SQUASHFS_I(i)->u.s2.directory_index_start,
	2054	+ SQUASHFS_I(i)->u.s2.directory_index_offset,
	2055	+ SQUASHFS_I(i)->u.s2.directory_index_count, name,
	2056	+ len);
	2057	+
	2058	+ while (length < i_size_read(i)) {
	2059	+ /* read directory header */
	2060	+ if (msblk->swap) {
	2061	+ struct squashfs_dir_header sdirh;
	2062	+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
	2063	+ next_block, next_offset, sizeof(sdirh),
	2064	+ &next_block, &next_offset))
	2065	+ goto failed_read;
	2066	+
	2067	+ length += sizeof(sdirh);
	2068	+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
	2069	+ } else {
	2070	+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
	2071	+ next_block, next_offset, sizeof(dirh),
	2072	+ &next_block, &next_offset))
	2073	+ goto failed_read;
	2074	+
	2075	+ length += sizeof(dirh);
	2076	+ }
	2077	+
	2078	+ dir_count = dirh.count + 1;
	2079	+ while (dir_count--) {
	2080	+ if (msblk->swap) {
	2081	+ struct squashfs_dir_entry sdire;
	2082	+ if (!squashfs_get_cached_block(i->i_sb, (char *)
	2083	+ &sdire, next_block,next_offset,
	2084	+ sizeof(sdire), &next_block,
	2085	+ &next_offset))
	2086	+ goto failed_read;
	2087	+
	2088	+ length += sizeof(sdire);
	2089	+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
	2090	+ } else {
	2091	+ if (!squashfs_get_cached_block(i->i_sb, (char *)
	2092	+ dire, next_block,next_offset,
	2093	+ sizeof(*dire), &next_block,
	2094	+ &next_offset))
	2095	+ goto failed_read;
	2096	+
	2097	+ length += sizeof(*dire);
	2098	+ }
	2099	+
	2100	+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
	2101	+ next_block, next_offset, dire->size + 1,
	2102	+ &next_block, &next_offset))
	2103	+ goto failed_read;
	2104	+
	2105	+ length += dire->size + 1;
	2106	+
	2107	+ if (name[0] < dire->name[0])
	2108	+ goto exit_loop;
	2109	+
	2110	+ if ((len == dire->size + 1) && !strncmp(name,
	2111	+ dire->name, len)) {
	2112	+ squashfs_inode_t ino =
	2113	+ SQUASHFS_MKINODE(dirh.start_block,
	2114	+ dire->offset);
	2115	+
	2116	+ TRACE("calling squashfs_iget for directory "
	2117	+ "entry %s, inode %x:%x, %d\n", name,
	2118	+ dirh.start_block, dire->offset,
	2119	+ dirh.inode_number + dire->inode_number);
	2120	+
	2121	+ inode = (msblk->iget)(i->i_sb, ino);
	2122	+
	2123	+ goto exit_loop;
	2124	+ }
	2125	+ }
	2126	+ }
	2127	+
	2128	+exit_loop:
	2129	+ kfree(dire);
	2130	+ d_add(dentry, inode);
	2131	+ return ERR_PTR(0);
	2132	+
	2133	+failed_read:
	2134	+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
	2135	+ next_offset);
	2136	+ goto exit_loop;
	2137	+}
	2138	+
	2139	+
	2140	+static void squashfs_put_super(struct super_block *s)
	2141	+{
	2142	+ int i;
	2143	+
	2144	+ if (s->s_fs_info) {
	2145	+ struct squashfs_sb_info *sbi = s->s_fs_info;
	2146	+ if (sbi->block_cache)
	2147	+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++)
	2148	+ if (sbi->block_cache[i].block !=
	2149	+ SQUASHFS_INVALID_BLK)
	2150	+ kfree(sbi->block_cache[i].data);
	2151	+ if (sbi->fragment)
	2152	+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++)
	2153	+ SQUASHFS_FREE(sbi->fragment[i].data);
	2154	+ kfree(sbi->fragment);
	2155	+ kfree(sbi->block_cache);
	2156	+ kfree(sbi->read_data);
	2157	+ kfree(sbi->read_page);
	2158	+ kfree(sbi->uid);
	2159	+ kfree(sbi->fragment_index);
	2160	+ kfree(sbi->fragment_index_2);
	2161	+ kfree(sbi->meta_index);
	2162	+ vfree(sbi->stream.workspace);
	2163	+ kfree(s->s_fs_info);
	2164	+ s->s_fs_info = NULL;
	2165	+ }
	2166	+}
	2167	+
	2168	+
	2169	+static int squashfs_get_sb(struct file_system_type *fs_type, int flags,
	2170	+ const char dev_name, void data,
	2171	+ struct vfsmount *mnt)
	2172	+{
	2173	+ return get_sb_bdev(fs_type, flags, dev_name, data, squashfs_fill_super,
	2174	+ mnt);
	2175	+}
	2176	+
	2177	+
	2178	+static int __init init_squashfs_fs(void)
	2179	+{
	2180	+ int err = init_inodecache();
	2181	+ if (err)
	2182	+ goto out;
	2183	+
	2184	+ printk(KERN_INFO "squashfs: version 3.1 (2006/08/19) "
	2185	+ "Phillip Lougher\n");
	2186	+
	2187	+ if ((err = register_filesystem(&squashfs_fs_type)))
	2188	+ destroy_inodecache();
	2189	+
	2190	+out:
	2191	+ return err;
	2192	+}
	2193	+
	2194	+
	2195	+static void __exit exit_squashfs_fs(void)
	2196	+{
	2197	+ unregister_filesystem(&squashfs_fs_type);
	2198	+ destroy_inodecache();
	2199	+}
	2200	+
	2201	+
	2202	+static kmem_cache_t * squashfs_inode_cachep;
	2203	+
	2204	+
	2205	+static struct inode squashfs_alloc_inode(struct super_block sb)
	2206	+{
	2207	+ struct squashfs_inode_info *ei;
	2208	+ ei = kmem_cache_alloc(squashfs_inode_cachep, SLAB_KERNEL);
	2209	+ if (!ei)
	2210	+ return NULL;
	2211	+ return &ei->vfs_inode;
	2212	+}
	2213	+
	2214	+
	2215	+static void squashfs_destroy_inode(struct inode *inode)
	2216	+{
	2217	+ kmem_cache_free(squashfs_inode_cachep, SQUASHFS_I(inode));
	2218	+}
	2219	+
	2220	+
	2221	+static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
	2222	+{
	2223	+ struct squashfs_inode_info *ei = foo;
	2224	+
	2225	+ if ((flags & (SLAB_CTOR_VERIFY\|SLAB_CTOR_CONSTRUCTOR)) ==
	2226	+ SLAB_CTOR_CONSTRUCTOR)
	2227	+ inode_init_once(&ei->vfs_inode);
	2228	+}
	2229	+
	2230	+
	2231	+static int __init init_inodecache(void)
	2232	+{
	2233	+ squashfs_inode_cachep = kmem_cache_create("squashfs_inode_cache",
	2234	+ sizeof(struct squashfs_inode_info),
	2235	+ 0, SLAB_HWCACHE_ALIGN\|SLAB_RECLAIM_ACCOUNT,
	2236	+ init_once, NULL);
	2237	+ if (squashfs_inode_cachep == NULL)
	2238	+ return -ENOMEM;
	2239	+ return 0;
	2240	+}
	2241	+
	2242	+
	2243	+static void destroy_inodecache(void)
	2244	+{
	2245	+ kmem_cache_destroy(squashfs_inode_cachep);
	2246	+}
	2247	+
	2248	+
	2249	+module_init(init_squashfs_fs);
	2250	+module_exit(exit_squashfs_fs);
	2251	+MODULE_DESCRIPTION("squashfs 3.1, a compressed read-only filesystem");
	2252	+MODULE_AUTHOR("Phillip Lougher <phillip@lougher.org.uk>");
	2253	+MODULE_LICENSE("GPL");
	2254	diff -Nru linux-2.6.19.ori2/fs/squashfs/squashfs.h linux-2.6.19.ori/fs/squashfs/squashfs.h
	2255	--- linux-2.6.19.ori2/fs/squashfs/squashfs.h 1970-01-01 01:00:00.000000000 +0100
	2256	+++ linux-2.6.19.ori/fs/squashfs/squashfs.h 2006-12-03 00:12:36.000000000 +0100
	2257	@@ -0,0 +1,86 @@
	2258	+/*
	2259	+ * Squashfs - a compressed read only filesystem for Linux
	2260	+ *
	2261	+ * Copyright (c) 2002, 2003, 2004, 2005, 2006
	2262	+ * Phillip Lougher <phillip@lougher.org.uk>
	2263	+ *
	2264	+ * This program is free software; you can redistribute it and/or
	2265	+ * modify it under the terms of the GNU General Public License
	2266	+ * as published by the Free Software Foundation; either version 2,
	2267	+ * or (at your option) any later version.
	2268	+ *
	2269	+ * This program is distributed in the hope that it will be useful,
	2270	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	2271	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	2272	+ * GNU General Public License for more details.
	2273	+ *
	2274	+ * You should have received a copy of the GNU General Public License
	2275	+ * along with this program; if not, write to the Free Software
	2276	+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	2277	+ *
	2278	+ * squashfs.h
	2279	+ */
	2280	+
	2281	+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
	2282	+#undef CONFIG_SQUASHFS_1_0_COMPATIBILITY
	2283	+#endif
	2284	+
	2285	+#ifdef SQUASHFS_TRACE
	2286	+#define TRACE(s, args...) printk(KERN_NOTICE "SQUASHFS: "s, ## args)
	2287	+#else
	2288	+#define TRACE(s, args...) {}
	2289	+#endif
	2290	+
	2291	+#define ERROR(s, args...) printk(KERN_ERR "SQUASHFS error: "s, ## args)
	2292	+
	2293	+#define SERROR(s, args...) do { \
	2294	+ if (!silent) \
	2295	+ printk(KERN_ERR "SQUASHFS error: "s, ## args);\
	2296	+ } while(0)
	2297	+
	2298	+#define WARNING(s, args...) printk(KERN_WARNING "SQUASHFS: "s, ## args)
	2299	+
	2300	+static inline struct squashfs_inode_info SQUASHFS_I(struct inode inode)
	2301	+{
	2302	+ return list_entry(inode, struct squashfs_inode_info, vfs_inode);
	2303	+}
	2304	+
	2305	+#if defined(CONFIG_SQUASHFS_1_0_COMPATIBILITY ) \|\| defined(CONFIG_SQUASHFS_2_0_COMPATIBILITY)
	2306	+#define SQSH_EXTERN
	2307	+extern unsigned int squashfs_read_data(struct super_block s, char buffer,
	2308	+ long long index, unsigned int length,
	2309	+ long long *next_index);
	2310	+extern int squashfs_get_cached_block(struct super_block s, char buffer,
	2311	+ long long block, unsigned int offset,
	2312	+ int length, long long *next_block,
	2313	+ unsigned int *next_offset);
	2314	+extern void release_cached_fragment(struct squashfs_sb_info *msblk, struct
	2315	+ squashfs_fragment_cache *fragment);
	2316	+extern struct squashfs_fragment_cache *get_cached_fragment(struct super_block
	2317	+ *s, long long start_block,
	2318	+ int length);
	2319	+extern struct address_space_operations squashfs_symlink_aops;
	2320	+extern struct address_space_operations squashfs_aops;
	2321	+extern struct address_space_operations squashfs_aops_4K;
	2322	+extern struct inode_operations squashfs_dir_inode_ops;
	2323	+#else
	2324	+#define SQSH_EXTERN static
	2325	+#endif
	2326	+
	2327	+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
	2328	+extern int squashfs_1_0_supported(struct squashfs_sb_info *msblk);
	2329	+#else
	2330	+static inline int squashfs_1_0_supported(struct squashfs_sb_info *msblk)
	2331	+{
	2332	+ return 0;
	2333	+}
	2334	+#endif
	2335	+
	2336	+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY
	2337	+extern int squashfs_2_0_supported(struct squashfs_sb_info *msblk);
	2338	+#else
	2339	+static inline int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
	2340	+{
	2341	+ return 0;
	2342	+}
	2343	+#endif
	2344	diff -Nru linux-2.6.19.ori2/fs/squashfs/squashfs2_0.c linux-2.6.19.ori/fs/squashfs/squashfs2_0.c
	2345	--- linux-2.6.19.ori2/fs/squashfs/squashfs2_0.c 1970-01-01 01:00:00.000000000 +0100
	2346	+++ linux-2.6.19.ori/fs/squashfs/squashfs2_0.c 2006-12-03 00:13:45.000000000 +0100
	2347	@@ -0,0 +1,778 @@
	2348	+/*
	2349	+ * Squashfs - a compressed read only filesystem for Linux
	2350	+ *
	2351	+ * Copyright (c) 2002, 2003, 2004, 2005, 2006
	2352	+ * Phillip Lougher <phillip@lougher.org.uk>
	2353	+ *
	2354	+ * This program is free software; you can redistribute it and/or
	2355	+ * modify it under the terms of the GNU General Public License
	2356	+ * as published by the Free Software Foundation; either version 2,
	2357	+ * or (at your option) any later version.
	2358	+ *
	2359	+ * This program is distributed in the hope that it will be useful,
	2360	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	2361	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	2362	+ * GNU General Public License for more details.
	2363	+ *
	2364	+ * You should have received a copy of the GNU General Public License
	2365	+ * along with this program; if not, write to the Free Software
	2366	+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	2367	+ *
	2368	+ * squashfs2_0.c
	2369	+ */
	2370	+
	2371	+#include <linux/types.h>
	2372	+#include <linux/squashfs_fs.h>
	2373	+#include <linux/module.h>
	2374	+#include <linux/errno.h>
	2375	+#include <linux/slab.h>
	2376	+#include <linux/zlib.h>
	2377	+#include <linux/fs.h>
	2378	+#include <linux/smp_lock.h>
	2379	+#include <linux/slab.h>
	2380	+#include <linux/squashfs_fs_sb.h>
	2381	+#include <linux/squashfs_fs_i.h>
	2382	+#include <linux/buffer_head.h>
	2383	+#include <linux/vfs.h>
	2384	+#include <linux/init.h>
	2385	+#include <linux/dcache.h>
	2386	+#include <linux/wait.h>
	2387	+#include <linux/zlib.h>
	2388	+#include <linux/blkdev.h>
	2389	+#include <linux/vmalloc.h>
	2390	+#include <asm/uaccess.h>
	2391	+#include <asm/semaphore.h>
	2392	+
	2393	+#include "squashfs.h"
	2394	+static int squashfs_readdir_2(struct file file, void dirent, filldir_t filldir);
	2395	+static struct dentry squashfs_lookup_2(struct inode , struct dentry *,
	2396	+ struct nameidata *);
	2397	+
	2398	+static struct file_operations squashfs_dir_ops_2 = {
	2399	+ .read = generic_read_dir,
	2400	+ .readdir = squashfs_readdir_2
	2401	+};
	2402	+
	2403	+static struct inode_operations squashfs_dir_inode_ops_2 = {
	2404	+ .lookup = squashfs_lookup_2
	2405	+};
	2406	+
	2407	+static unsigned char squashfs_filetype_table[] = {
	2408	+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
	2409	+};
	2410	+
	2411	+static int read_fragment_index_table_2(struct super_block *s)
	2412	+{
	2413	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	2414	+ struct squashfs_super_block *sblk = &msblk->sblk;
	2415	+
	2416	+ if (!(msblk->fragment_index_2 = kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES_2
	2417	+ (sblk->fragments), GFP_KERNEL))) {
	2418	+ ERROR("Failed to allocate uid/gid table\n");
	2419	+ return 0;
	2420	+ }
	2421	+
	2422	+ if (SQUASHFS_FRAGMENT_INDEX_BYTES_2(sblk->fragments) &&
	2423	+ !squashfs_read_data(s, (char *)
	2424	+ msblk->fragment_index_2,
	2425	+ sblk->fragment_table_start,
	2426	+ SQUASHFS_FRAGMENT_INDEX_BYTES_2
	2427	+ (sblk->fragments) \|
	2428	+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL)) {
	2429	+ ERROR("unable to read fragment index table\n");
	2430	+ return 0;
	2431	+ }
	2432	+
	2433	+ if (msblk->swap) {
	2434	+ int i;
	2435	+ unsigned int fragment;
	2436	+
	2437	+ for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES_2(sblk->fragments);
	2438	+ i++) {
	2439	+ SQUASHFS_SWAP_FRAGMENT_INDEXES_2((&fragment),
	2440	+ &msblk->fragment_index_2[i], 1);
	2441	+ msblk->fragment_index_2[i] = fragment;
	2442	+ }
	2443	+ }
	2444	+
	2445	+ return 1;
	2446	+}
	2447	+
	2448	+
	2449	+static int get_fragment_location_2(struct super_block *s, unsigned int fragment,
	2450	+ long long *fragment_start_block,
	2451	+ unsigned int *fragment_size)
	2452	+{
	2453	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	2454	+ long long start_block =
	2455	+ msblk->fragment_index_2[SQUASHFS_FRAGMENT_INDEX_2(fragment)];
	2456	+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET_2(fragment);
	2457	+ struct squashfs_fragment_entry_2 fragment_entry;
	2458	+
	2459	+ if (msblk->swap) {
	2460	+ struct squashfs_fragment_entry_2 sfragment_entry;
	2461	+
	2462	+ if (!squashfs_get_cached_block(s, (char *) &sfragment_entry,
	2463	+ start_block, offset,
	2464	+ sizeof(sfragment_entry), &start_block,
	2465	+ &offset))
	2466	+ goto out;
	2467	+ SQUASHFS_SWAP_FRAGMENT_ENTRY_2(&fragment_entry, &sfragment_entry);
	2468	+ } else
	2469	+ if (!squashfs_get_cached_block(s, (char *) &fragment_entry,
	2470	+ start_block, offset,
	2471	+ sizeof(fragment_entry), &start_block,
	2472	+ &offset))
	2473	+ goto out;
	2474	+
	2475	+ *fragment_start_block = fragment_entry.start_block;
	2476	+ *fragment_size = fragment_entry.size;
	2477	+
	2478	+ return 1;
	2479	+
	2480	+out:
	2481	+ return 0;
	2482	+}
	2483	+
	2484	+
	2485	+static struct inode squashfs_new_inode(struct super_block s,
	2486	+ struct squashfs_base_inode_header_2 *inodeb, unsigned int ino)
	2487	+{
	2488	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	2489	+ struct squashfs_super_block *sblk = &msblk->sblk;
	2490	+ struct inode *i = new_inode(s);
	2491	+
	2492	+ if (i) {
	2493	+ i->i_ino = ino;
	2494	+ i->i_mtime.tv_sec = sblk->mkfs_time;
	2495	+ i->i_atime.tv_sec = sblk->mkfs_time;
	2496	+ i->i_ctime.tv_sec = sblk->mkfs_time;
	2497	+ i->i_uid = msblk->uid[inodeb->uid];
	2498	+ i->i_mode = inodeb->mode;
	2499	+ i->i_nlink = 1;
	2500	+ i->i_size = 0;
	2501	+ if (inodeb->guid == SQUASHFS_GUIDS)
	2502	+ i->i_gid = i->i_uid;
	2503	+ else
	2504	+ i->i_gid = msblk->guid[inodeb->guid];
	2505	+ }
	2506	+
	2507	+ return i;
	2508	+}
	2509	+
	2510	+
	2511	+static struct inode squashfs_iget_2(struct super_block s, squashfs_inode_t inode)
	2512	+{
	2513	+ struct inode *i;
	2514	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	2515	+ struct squashfs_super_block *sblk = &msblk->sblk;
	2516	+ unsigned int block = SQUASHFS_INODE_BLK(inode) +
	2517	+ sblk->inode_table_start;
	2518	+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
	2519	+ unsigned int ino = SQUASHFS_MK_VFS_INODE(block
	2520	+ - sblk->inode_table_start, offset);
	2521	+ long long next_block;
	2522	+ unsigned int next_offset;
	2523	+ union squashfs_inode_header_2 id, sid;
	2524	+ struct squashfs_base_inode_header_2 *inodeb = &id.base,
	2525	+ *sinodeb = &sid.base;
	2526	+
	2527	+ TRACE("Entered squashfs_iget\n");
	2528	+
	2529	+ if (msblk->swap) {
	2530	+ if (!squashfs_get_cached_block(s, (char *) sinodeb, block,
	2531	+ offset, sizeof(*sinodeb), &next_block,
	2532	+ &next_offset))
	2533	+ goto failed_read;
	2534	+ SQUASHFS_SWAP_BASE_INODE_HEADER_2(inodeb, sinodeb,
	2535	+ sizeof(*sinodeb));
	2536	+ } else
	2537	+ if (!squashfs_get_cached_block(s, (char *) inodeb, block,
	2538	+ offset, sizeof(*inodeb), &next_block,
	2539	+ &next_offset))
	2540	+ goto failed_read;
	2541	+
	2542	+ switch(inodeb->inode_type) {
	2543	+ case SQUASHFS_FILE_TYPE: {
	2544	+ struct squashfs_reg_inode_header_2 *inodep = &id.reg;
	2545	+ struct squashfs_reg_inode_header_2 *sinodep = &sid.reg;
	2546	+ long long frag_blk;
	2547	+ unsigned int frag_size;
	2548	+
	2549	+ if (msblk->swap) {
	2550	+ if (!squashfs_get_cached_block(s, (char *)
	2551	+ sinodep, block, offset,
	2552	+ sizeof(*sinodep), &next_block,
	2553	+ &next_offset))
	2554	+ goto failed_read;
	2555	+ SQUASHFS_SWAP_REG_INODE_HEADER_2(inodep, sinodep);
	2556	+ } else
	2557	+ if (!squashfs_get_cached_block(s, (char *)
	2558	+ inodep, block, offset,
	2559	+ sizeof(*inodep), &next_block,
	2560	+ &next_offset))
	2561	+ goto failed_read;
	2562	+
	2563	+ frag_blk = SQUASHFS_INVALID_BLK;
	2564	+ if (inodep->fragment != SQUASHFS_INVALID_FRAG &&
	2565	+ !get_fragment_location_2(s,
	2566	+ inodep->fragment, &frag_blk, &frag_size))
	2567	+ goto failed_read;
	2568	+
	2569	+ if((i = squashfs_new_inode(s, inodeb, ino)) == NULL)
	2570	+ goto failed_read1;
	2571	+
	2572	+ i->i_size = inodep->file_size;
	2573	+ i->i_fop = &generic_ro_fops;
	2574	+ i->i_mode \|= S_IFREG;
	2575	+ i->i_mtime.tv_sec = inodep->mtime;
	2576	+ i->i_atime.tv_sec = inodep->mtime;
	2577	+ i->i_ctime.tv_sec = inodep->mtime;
	2578	+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
	2579	+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk;
	2580	+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size;
	2581	+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset;
	2582	+ SQUASHFS_I(i)->start_block = inodep->start_block;
	2583	+ SQUASHFS_I(i)->u.s1.block_list_start = next_block;
	2584	+ SQUASHFS_I(i)->offset = next_offset;
	2585	+ if (sblk->block_size > 4096)
	2586	+ i->i_data.a_ops = &squashfs_aops;
	2587	+ else
	2588	+ i->i_data.a_ops = &squashfs_aops_4K;
	2589	+
	2590	+ TRACE("File inode %x:%x, start_block %x, "
	2591	+ "block_list_start %llx, offset %x\n",
	2592	+ SQUASHFS_INODE_BLK(inode), offset,
	2593	+ inodep->start_block, next_block,
	2594	+ next_offset);
	2595	+ break;
	2596	+ }
	2597	+ case SQUASHFS_DIR_TYPE: {
	2598	+ struct squashfs_dir_inode_header_2 *inodep = &id.dir;
	2599	+ struct squashfs_dir_inode_header_2 *sinodep = &sid.dir;
	2600	+
	2601	+ if (msblk->swap) {
	2602	+ if (!squashfs_get_cached_block(s, (char *)
	2603	+ sinodep, block, offset,
	2604	+ sizeof(*sinodep), &next_block,
	2605	+ &next_offset))
	2606	+ goto failed_read;
	2607	+ SQUASHFS_SWAP_DIR_INODE_HEADER_2(inodep, sinodep);
	2608	+ } else
	2609	+ if (!squashfs_get_cached_block(s, (char *)
	2610	+ inodep, block, offset,
	2611	+ sizeof(*inodep), &next_block,
	2612	+ &next_offset))
	2613	+ goto failed_read;
	2614	+
	2615	+ if((i = squashfs_new_inode(s, inodeb, ino)) == NULL)
	2616	+ goto failed_read1;
	2617	+
	2618	+ i->i_size = inodep->file_size;
	2619	+ i->i_op = &squashfs_dir_inode_ops_2;
	2620	+ i->i_fop = &squashfs_dir_ops_2;
	2621	+ i->i_mode \|= S_IFDIR;
	2622	+ i->i_mtime.tv_sec = inodep->mtime;
	2623	+ i->i_atime.tv_sec = inodep->mtime;
	2624	+ i->i_ctime.tv_sec = inodep->mtime;
	2625	+ SQUASHFS_I(i)->start_block = inodep->start_block;
	2626	+ SQUASHFS_I(i)->offset = inodep->offset;
	2627	+ SQUASHFS_I(i)->u.s2.directory_index_count = 0;
	2628	+ SQUASHFS_I(i)->u.s2.parent_inode = 0;
	2629	+
	2630	+ TRACE("Directory inode %x:%x, start_block %x, offset "
	2631	+ "%x\n", SQUASHFS_INODE_BLK(inode),
	2632	+ offset, inodep->start_block,
	2633	+ inodep->offset);
	2634	+ break;
	2635	+ }
	2636	+ case SQUASHFS_LDIR_TYPE: {
	2637	+ struct squashfs_ldir_inode_header_2 *inodep = &id.ldir;
	2638	+ struct squashfs_ldir_inode_header_2 *sinodep = &sid.ldir;
	2639	+
	2640	+ if (msblk->swap) {
	2641	+ if (!squashfs_get_cached_block(s, (char *)
	2642	+ sinodep, block, offset,
	2643	+ sizeof(*sinodep), &next_block,
	2644	+ &next_offset))
	2645	+ goto failed_read;
	2646	+ SQUASHFS_SWAP_LDIR_INODE_HEADER_2(inodep,
	2647	+ sinodep);
	2648	+ } else
	2649	+ if (!squashfs_get_cached_block(s, (char *)
	2650	+ inodep, block, offset,
	2651	+ sizeof(*inodep), &next_block,
	2652	+ &next_offset))
	2653	+ goto failed_read;
	2654	+
	2655	+ if((i = squashfs_new_inode(s, inodeb, ino)) == NULL)
	2656	+ goto failed_read1;
	2657	+
	2658	+ i->i_size = inodep->file_size;
	2659	+ i->i_op = &squashfs_dir_inode_ops_2;
	2660	+ i->i_fop = &squashfs_dir_ops_2;
	2661	+ i->i_mode \|= S_IFDIR;
	2662	+ i->i_mtime.tv_sec = inodep->mtime;
	2663	+ i->i_atime.tv_sec = inodep->mtime;
	2664	+ i->i_ctime.tv_sec = inodep->mtime;
	2665	+ SQUASHFS_I(i)->start_block = inodep->start_block;
	2666	+ SQUASHFS_I(i)->offset = inodep->offset;
	2667	+ SQUASHFS_I(i)->u.s2.directory_index_start = next_block;
	2668	+ SQUASHFS_I(i)->u.s2.directory_index_offset =
	2669	+ next_offset;
	2670	+ SQUASHFS_I(i)->u.s2.directory_index_count =
	2671	+ inodep->i_count;
	2672	+ SQUASHFS_I(i)->u.s2.parent_inode = 0;
	2673	+
	2674	+ TRACE("Long directory inode %x:%x, start_block %x, "
	2675	+ "offset %x\n",
	2676	+ SQUASHFS_INODE_BLK(inode), offset,
	2677	+ inodep->start_block, inodep->offset);
	2678	+ break;
	2679	+ }
	2680	+ case SQUASHFS_SYMLINK_TYPE: {
	2681	+ struct squashfs_symlink_inode_header_2 *inodep =
	2682	+ &id.symlink;
	2683	+ struct squashfs_symlink_inode_header_2 *sinodep =
	2684	+ &sid.symlink;
	2685	+
	2686	+ if (msblk->swap) {
	2687	+ if (!squashfs_get_cached_block(s, (char *)
	2688	+ sinodep, block, offset,
	2689	+ sizeof(*sinodep), &next_block,
	2690	+ &next_offset))
	2691	+ goto failed_read;
	2692	+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(inodep,
	2693	+ sinodep);
	2694	+ } else
	2695	+ if (!squashfs_get_cached_block(s, (char *)
	2696	+ inodep, block, offset,
	2697	+ sizeof(*inodep), &next_block,
	2698	+ &next_offset))
	2699	+ goto failed_read;
	2700	+
	2701	+ if((i = squashfs_new_inode(s, inodeb, ino)) == NULL)
	2702	+ goto failed_read1;
	2703	+
	2704	+ i->i_size = inodep->symlink_size;
	2705	+ i->i_op = &page_symlink_inode_operations;
	2706	+ i->i_data.a_ops = &squashfs_symlink_aops;
	2707	+ i->i_mode \|= S_IFLNK;
	2708	+ SQUASHFS_I(i)->start_block = next_block;
	2709	+ SQUASHFS_I(i)->offset = next_offset;
	2710	+
	2711	+ TRACE("Symbolic link inode %x:%x, start_block %llx, "
	2712	+ "offset %x\n",
	2713	+ SQUASHFS_INODE_BLK(inode), offset,
	2714	+ next_block, next_offset);
	2715	+ break;
	2716	+ }
	2717	+ case SQUASHFS_BLKDEV_TYPE:
	2718	+ case SQUASHFS_CHRDEV_TYPE: {
	2719	+ struct squashfs_dev_inode_header_2 *inodep = &id.dev;
	2720	+ struct squashfs_dev_inode_header_2 *sinodep = &sid.dev;
	2721	+
	2722	+ if (msblk->swap) {
	2723	+ if (!squashfs_get_cached_block(s, (char *)
	2724	+ sinodep, block, offset,
	2725	+ sizeof(*sinodep), &next_block,
	2726	+ &next_offset))
	2727	+ goto failed_read;
	2728	+ SQUASHFS_SWAP_DEV_INODE_HEADER_2(inodep, sinodep);
	2729	+ } else
	2730	+ if (!squashfs_get_cached_block(s, (char *)
	2731	+ inodep, block, offset,
	2732	+ sizeof(*inodep), &next_block,
	2733	+ &next_offset))
	2734	+ goto failed_read;
	2735	+
	2736	+ if ((i = squashfs_new_inode(s, inodeb, ino)) == NULL)
	2737	+ goto failed_read1;
	2738	+
	2739	+ i->i_mode \|= (inodeb->inode_type ==
	2740	+ SQUASHFS_CHRDEV_TYPE) ? S_IFCHR :
	2741	+ S_IFBLK;
	2742	+ init_special_inode(i, i->i_mode,
	2743	+ old_decode_dev(inodep->rdev));
	2744	+
	2745	+ TRACE("Device inode %x:%x, rdev %x\n",
	2746	+ SQUASHFS_INODE_BLK(inode), offset,
	2747	+ inodep->rdev);
	2748	+ break;
	2749	+ }
	2750	+ case SQUASHFS_FIFO_TYPE:
	2751	+ case SQUASHFS_SOCKET_TYPE: {
	2752	+ if ((i = squashfs_new_inode(s, inodeb, ino)) == NULL)
	2753	+ goto failed_read1;
	2754	+
	2755	+ i->i_mode \|= (inodeb->inode_type == SQUASHFS_FIFO_TYPE)
	2756	+ ? S_IFIFO : S_IFSOCK;
	2757	+ init_special_inode(i, i->i_mode, 0);
	2758	+ break;
	2759	+ }
	2760	+ default:
	2761	+ ERROR("Unknown inode type %d in squashfs_iget!\n",
	2762	+ inodeb->inode_type);
	2763	+ goto failed_read1;
	2764	+ }
	2765	+
	2766	+ insert_inode_hash(i);
	2767	+ return i;
	2768	+
	2769	+failed_read:
	2770	+ ERROR("Unable to read inode [%x:%x]\n", block, offset);
	2771	+
	2772	+failed_read1:
	2773	+ return NULL;
	2774	+}
	2775	+
	2776	+
	2777	+static int get_dir_index_using_offset(struct super_block *s, long long
	2778	+ next_block, unsigned int next_offset,
	2779	+ long long index_start,
	2780	+ unsigned int index_offset, int i_count,
	2781	+ long long f_pos)
	2782	+{
	2783	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	2784	+ struct squashfs_super_block *sblk = &msblk->sblk;
	2785	+ int i, length = 0;
	2786	+ struct squashfs_dir_index_2 index;
	2787	+
	2788	+ TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n",
	2789	+ i_count, (unsigned int) f_pos);
	2790	+
	2791	+ if (f_pos == 0)
	2792	+ goto finish;
	2793	+
	2794	+ for (i = 0; i < i_count; i++) {
	2795	+ if (msblk->swap) {
	2796	+ struct squashfs_dir_index_2 sindex;
	2797	+ squashfs_get_cached_block(s, (char *) &sindex,
	2798	+ index_start, index_offset,
	2799	+ sizeof(sindex), &index_start,
	2800	+ &index_offset);
	2801	+ SQUASHFS_SWAP_DIR_INDEX_2(&index, &sindex);
	2802	+ } else
	2803	+ squashfs_get_cached_block(s, (char *) &index,
	2804	+ index_start, index_offset,
	2805	+ sizeof(index), &index_start,
	2806	+ &index_offset);
	2807	+
	2808	+ if (index.index > f_pos)
	2809	+ break;
	2810	+
	2811	+ squashfs_get_cached_block(s, NULL, index_start, index_offset,
	2812	+ index.size + 1, &index_start,
	2813	+ &index_offset);
	2814	+
	2815	+ length = index.index;
	2816	+ *next_block = index.start_block + sblk->directory_table_start;
	2817	+ }
	2818	+
	2819	+ next_offset = (length + next_offset) % SQUASHFS_METADATA_SIZE;
	2820	+
	2821	+finish:
	2822	+ return length;
	2823	+}
	2824	+
	2825	+
	2826	+static int get_dir_index_using_name(struct super_block *s, long long
	2827	+ next_block, unsigned int next_offset,
	2828	+ long long index_start,
	2829	+ unsigned int index_offset, int i_count,
	2830	+ const char *name, int size)
	2831	+{
	2832	+ struct squashfs_sb_info *msblk = s->s_fs_info;
	2833	+ struct squashfs_super_block *sblk = &msblk->sblk;
	2834	+ int i, length = 0;
	2835	+ struct squashfs_dir_index_2 *index;
	2836	+ char *str;
	2837	+
	2838	+ TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count);
	2839	+
	2840	+ if (!(str = kmalloc(sizeof(struct squashfs_dir_index) +
	2841	+ (SQUASHFS_NAME_LEN + 1) * 2, GFP_KERNEL))) {
	2842	+ ERROR("Failed to allocate squashfs_dir_index\n");
	2843	+ goto failure;
	2844	+ }
	2845	+
	2846	+ index = (struct squashfs_dir_index_2 *) (str + SQUASHFS_NAME_LEN + 1);
	2847	+ strncpy(str, name, size);
	2848	+ str[size] = '\0';
	2849	+
	2850	+ for (i = 0; i < i_count; i++) {
	2851	+ if (msblk->swap) {
	2852	+ struct squashfs_dir_index_2 sindex;
	2853	+ squashfs_get_cached_block(s, (char *) &sindex,
	2854	+ index_start, index_offset,
	2855	+ sizeof(sindex), &index_start,
	2856	+ &index_offset);
	2857	+ SQUASHFS_SWAP_DIR_INDEX_2(index, &sindex);
	2858	+ } else
	2859	+ squashfs_get_cached_block(s, (char *) index,
	2860	+ index_start, index_offset,
	2861	+ sizeof(struct squashfs_dir_index_2),
	2862	+ &index_start, &index_offset);
	2863	+
	2864	+ squashfs_get_cached_block(s, index->name, index_start,
	2865	+ index_offset, index->size + 1,
	2866	+ &index_start, &index_offset);
	2867	+
	2868	+ index->name[index->size + 1] = '\0';
	2869	+
	2870	+ if (strcmp(index->name, str) > 0)
	2871	+ break;
	2872	+
	2873	+ length = index->index;
	2874	+ *next_block = index->start_block + sblk->directory_table_start;
	2875	+ }
	2876	+
	2877	+ next_offset = (length + next_offset) % SQUASHFS_METADATA_SIZE;
	2878	+ kfree(str);
	2879	+failure:
	2880	+ return length;
	2881	+}
	2882	+
	2883	+
	2884	+static int squashfs_readdir_2(struct file file, void dirent, filldir_t filldir)
	2885	+{
	2886	+ struct inode *i = file->f_dentry->d_inode;
	2887	+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
	2888	+ struct squashfs_super_block *sblk = &msblk->sblk;
	2889	+ long long next_block = SQUASHFS_I(i)->start_block +
	2890	+ sblk->directory_table_start;
	2891	+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
	2892	+ dir_count;
	2893	+ struct squashfs_dir_header_2 dirh;
	2894	+ struct squashfs_dir_entry_2 *dire;
	2895	+
	2896	+ TRACE("Entered squashfs_readdir_2 [%llx:%x]\n", next_block, next_offset);
	2897	+
	2898	+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
	2899	+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
	2900	+ ERROR("Failed to allocate squashfs_dir_entry\n");
	2901	+ goto finish;
	2902	+ }
	2903	+
	2904	+ length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset,
	2905	+ SQUASHFS_I(i)->u.s2.directory_index_start,
	2906	+ SQUASHFS_I(i)->u.s2.directory_index_offset,
	2907	+ SQUASHFS_I(i)->u.s2.directory_index_count,
	2908	+ file->f_pos);
	2909	+
	2910	+ while (length < i_size_read(i)) {
	2911	+ /* read directory header */
	2912	+ if (msblk->swap) {
	2913	+ struct squashfs_dir_header_2 sdirh;
	2914	+
	2915	+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
	2916	+ next_block, next_offset, sizeof(sdirh),
	2917	+ &next_block, &next_offset))
	2918	+ goto failed_read;
	2919	+
	2920	+ length += sizeof(sdirh);
	2921	+ SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh);
	2922	+ } else {
	2923	+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
	2924	+ next_block, next_offset, sizeof(dirh),
	2925	+ &next_block, &next_offset))
	2926	+ goto failed_read;
	2927	+
	2928	+ length += sizeof(dirh);
	2929	+ }
	2930	+
	2931	+ dir_count = dirh.count + 1;
	2932	+ while (dir_count--) {
	2933	+ if (msblk->swap) {
	2934	+ struct squashfs_dir_entry_2 sdire;
	2935	+ if (!squashfs_get_cached_block(i->i_sb, (char *)
	2936	+ &sdire, next_block, next_offset,
	2937	+ sizeof(sdire), &next_block,
	2938	+ &next_offset))
	2939	+ goto failed_read;
	2940	+
	2941	+ length += sizeof(sdire);
	2942	+ SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire);
	2943	+ } else {
	2944	+ if (!squashfs_get_cached_block(i->i_sb, (char *)
	2945	+ dire, next_block, next_offset,
	2946	+ sizeof(*dire), &next_block,
	2947	+ &next_offset))
	2948	+ goto failed_read;
	2949	+
	2950	+ length += sizeof(*dire);
	2951	+ }
	2952	+
	2953	+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
	2954	+ next_block, next_offset,
	2955	+ dire->size + 1, &next_block,
	2956	+ &next_offset))
	2957	+ goto failed_read;
	2958	+
	2959	+ length += dire->size + 1;
	2960	+
	2961	+ if (file->f_pos >= length)
	2962	+ continue;
	2963	+
	2964	+ dire->name[dire->size + 1] = '\0';
	2965	+
	2966	+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d)\n",
	2967	+ (unsigned int) dirent, dire->name,
	2968	+ dire->size + 1, (int) file->f_pos,
	2969	+ dirh.start_block, dire->offset,
	2970	+ squashfs_filetype_table[dire->type]);
	2971	+
	2972	+ if (filldir(dirent, dire->name, dire->size + 1,
	2973	+ file->f_pos, SQUASHFS_MK_VFS_INODE(
	2974	+ dirh.start_block, dire->offset),
	2975	+ squashfs_filetype_table[dire->type])
	2976	+ < 0) {
	2977	+ TRACE("Filldir returned less than 0\n");
	2978	+ goto finish;
	2979	+ }
	2980	+ file->f_pos = length;
	2981	+ }
	2982	+ }
	2983	+
	2984	+finish:
	2985	+ kfree(dire);
	2986	+ return 0;
	2987	+
	2988	+failed_read:
	2989	+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
	2990	+ next_offset);
	2991	+ kfree(dire);
	2992	+ return 0;
	2993	+}
	2994	+
	2995	+
	2996	+static struct dentry squashfs_lookup_2(struct inode i, struct dentry *dentry,
	2997	+ struct nameidata *nd)
	2998	+{
	2999	+ const unsigned char *name = dentry->d_name.name;
	3000	+ int len = dentry->d_name.len;
	3001	+ struct inode *inode = NULL;
	3002	+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info;
	3003	+ struct squashfs_super_block *sblk = &msblk->sblk;
	3004	+ long long next_block = SQUASHFS_I(i)->start_block +
	3005	+ sblk->directory_table_start;
	3006	+ int next_offset = SQUASHFS_I(i)->offset, length = 0,
	3007	+ dir_count;
	3008	+ struct squashfs_dir_header_2 dirh;
	3009	+ struct squashfs_dir_entry_2 *dire;
	3010	+ int sorted = sblk->s_major == 2 && sblk->s_minor >= 1;
	3011	+
	3012	+ TRACE("Entered squashfs_lookup_2 [%llx:%x]\n", next_block, next_offset);
	3013	+
	3014	+ if (!(dire = kmalloc(sizeof(struct squashfs_dir_entry) +
	3015	+ SQUASHFS_NAME_LEN + 1, GFP_KERNEL))) {
	3016	+ ERROR("Failed to allocate squashfs_dir_entry\n");
	3017	+ goto exit_loop;
	3018	+ }
	3019	+
	3020	+ if (len > SQUASHFS_NAME_LEN)
	3021	+ goto exit_loop;
	3022	+
	3023	+ length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset,
	3024	+ SQUASHFS_I(i)->u.s2.directory_index_start,
	3025	+ SQUASHFS_I(i)->u.s2.directory_index_offset,
	3026	+ SQUASHFS_I(i)->u.s2.directory_index_count, name,
	3027	+ len);
	3028	+
	3029	+ while (length < i_size_read(i)) {
	3030	+ /* read directory header */
	3031	+ if (msblk->swap) {
	3032	+ struct squashfs_dir_header_2 sdirh;
	3033	+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh,
	3034	+ next_block, next_offset, sizeof(sdirh),
	3035	+ &next_block, &next_offset))
	3036	+ goto failed_read;
	3037	+
	3038	+ length += sizeof(sdirh);
	3039	+ SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh);
	3040	+ } else {
	3041	+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh,
	3042	+ next_block, next_offset, sizeof(dirh),
	3043	+ &next_block, &next_offset))
	3044	+ goto failed_read;
	3045	+
	3046	+ length += sizeof(dirh);
	3047	+ }
	3048	+
	3049	+ dir_count = dirh.count + 1;
	3050	+ while (dir_count--) {
	3051	+ if (msblk->swap) {
	3052	+ struct squashfs_dir_entry_2 sdire;
	3053	+ if (!squashfs_get_cached_block(i->i_sb, (char *)
	3054	+ &sdire, next_block,next_offset,
	3055	+ sizeof(sdire), &next_block,
	3056	+ &next_offset))
	3057	+ goto failed_read;
	3058	+
	3059	+ length += sizeof(sdire);
	3060	+ SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire);
	3061	+ } else {
	3062	+ if (!squashfs_get_cached_block(i->i_sb, (char *)
	3063	+ dire, next_block,next_offset,
	3064	+ sizeof(*dire), &next_block,
	3065	+ &next_offset))
	3066	+ goto failed_read;
	3067	+
	3068	+ length += sizeof(*dire);
	3069	+ }
	3070	+
	3071	+ if (!squashfs_get_cached_block(i->i_sb, dire->name,
	3072	+ next_block, next_offset, dire->size + 1,
	3073	+ &next_block, &next_offset))
	3074	+ goto failed_read;
	3075	+
	3076	+ length += dire->size + 1;
	3077	+
	3078	+ if (sorted && name[0] < dire->name[0])
	3079	+ goto exit_loop;
	3080	+
	3081	+ if ((len == dire->size + 1) && !strncmp(name,
	3082	+ dire->name, len)) {
	3083	+ squashfs_inode_t ino =
	3084	+ SQUASHFS_MKINODE(dirh.start_block,
	3085	+ dire->offset);
	3086	+
	3087	+ TRACE("calling squashfs_iget for directory "
	3088	+ "entry %s, inode %x:%x, %lld\n", name,
	3089	+ dirh.start_block, dire->offset, ino);
	3090	+
	3091	+ inode = (msblk->iget)(i->i_sb, ino);
	3092	+
	3093	+ goto exit_loop;
	3094	+ }
	3095	+ }
	3096	+ }
	3097	+
	3098	+exit_loop:
	3099	+ kfree(dire);
	3100	+ d_add(dentry, inode);
	3101	+ return ERR_PTR(0);
	3102	+
	3103	+failed_read:
	3104	+ ERROR("Unable to read directory block [%llx:%x]\n", next_block,
	3105	+ next_offset);
	3106	+ goto exit_loop;
	3107	+}
	3108	+
	3109	+
	3110	+int squashfs_2_0_supported(struct squashfs_sb_info *msblk)
	3111	+{
	3112	+ struct squashfs_super_block *sblk = &msblk->sblk;
	3113	+
	3114	+ msblk->iget = squashfs_iget_2;
	3115	+ msblk->read_fragment_index_table = read_fragment_index_table_2;
	3116	+
	3117	+ sblk->bytes_used = sblk->bytes_used_2;
	3118	+ sblk->uid_start = sblk->uid_start_2;
	3119	+ sblk->guid_start = sblk->guid_start_2;
	3120	+ sblk->inode_table_start = sblk->inode_table_start_2;
	3121	+ sblk->directory_table_start = sblk->directory_table_start_2;
	3122	+ sblk->fragment_table_start = sblk->fragment_table_start_2;
	3123	+
	3124	+ return 1;
	3125	+}
	3126	diff -Nru linux-2.6.19.ori2/include/linux/squashfs_fs.h linux-2.6.19.ori/include/linux/squashfs_fs.h
	3127	--- linux-2.6.19.ori2/include/linux/squashfs_fs.h 1970-01-01 01:00:00.000000000 +0100
	3128	+++ linux-2.6.19.ori/include/linux/squashfs_fs.h 2006-12-03 00:12:36.000000000 +0100
	3129	@@ -0,0 +1,911 @@
	3130	+#ifndef SQUASHFS_FS
	3131	+#define SQUASHFS_FS
	3132	+
	3133	+/*
	3134	+ * Squashfs
	3135	+ *
	3136	+ * Copyright (c) 2002, 2003, 2004, 2005, 2006
	3137	+ * Phillip Lougher <phillip@lougher.org.uk>
	3138	+ *
	3139	+ * This program is free software; you can redistribute it and/or
	3140	+ * modify it under the terms of the GNU General Public License
	3141	+ * as published by the Free Software Foundation; either version 2,
	3142	+ * or (at your option) any later version.
	3143	+ *
	3144	+ * This program is distributed in the hope that it will be useful,
	3145	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	3146	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	3147	+ * GNU General Public License for more details.
	3148	+ *
	3149	+ * You should have received a copy of the GNU General Public License
	3150	+ * along with this program; if not, write to the Free Software
	3151	+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	3152	+ *
	3153	+ * squashfs_fs.h
	3154	+ */
	3155	+
	3156	+#ifndef CONFIG_SQUASHFS_2_0_COMPATIBILITY
	3157	+#define CONFIG_SQUASHFS_2_0_COMPATIBILITY
	3158	+#endif
	3159	+
	3160	+#ifdef CONFIG_SQUASHFS_VMALLOC
	3161	+#define SQUASHFS_ALLOC(a) vmalloc(a)
	3162	+#define SQUASHFS_FREE(a) vfree(a)
	3163	+#else
	3164	+#define SQUASHFS_ALLOC(a) kmalloc(a, GFP_KERNEL)
	3165	+#define SQUASHFS_FREE(a) kfree(a)
	3166	+#endif
	3167	+#define SQUASHFS_CACHED_FRAGMENTS CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE
	3168	+#define SQUASHFS_MAJOR 3
	3169	+#define SQUASHFS_MINOR 0
	3170	+#define SQUASHFS_MAGIC 0x73717368
	3171	+#define SQUASHFS_MAGIC_SWAP 0x68737173
	3172	+#define SQUASHFS_START 0
	3173	+
	3174	+/* size of metadata (inode and directory) blocks */
	3175	+#define SQUASHFS_METADATA_SIZE 8192
	3176	+#define SQUASHFS_METADATA_LOG 13
	3177	+
	3178	+/* default size of data blocks */
	3179	+#define SQUASHFS_FILE_SIZE 65536
	3180	+#define SQUASHFS_FILE_LOG 16
	3181	+
	3182	+#define SQUASHFS_FILE_MAX_SIZE 65536
	3183	+
	3184	+/* Max number of uids and gids */
	3185	+#define SQUASHFS_UIDS 256
	3186	+#define SQUASHFS_GUIDS 255
	3187	+
	3188	+/* Max length of filename (not 255) */
	3189	+#define SQUASHFS_NAME_LEN 256
	3190	+
	3191	+#define SQUASHFS_INVALID ((long long) 0xffffffffffff)
	3192	+#define SQUASHFS_INVALID_FRAG ((unsigned int) 0xffffffff)
	3193	+#define SQUASHFS_INVALID_BLK ((long long) -1)
	3194	+#define SQUASHFS_USED_BLK ((long long) -2)
	3195	+
	3196	+/* Filesystem flags */
	3197	+#define SQUASHFS_NOI 0
	3198	+#define SQUASHFS_NOD 1
	3199	+#define SQUASHFS_CHECK 2
	3200	+#define SQUASHFS_NOF 3
	3201	+#define SQUASHFS_NO_FRAG 4
	3202	+#define SQUASHFS_ALWAYS_FRAG 5
	3203	+#define SQUASHFS_DUPLICATE 6
	3204	+
	3205	+#define SQUASHFS_BIT(flag, bit) ((flag >> bit) & 1)
	3206	+
	3207	+#define SQUASHFS_UNCOMPRESSED_INODES(flags) SQUASHFS_BIT(flags, \
	3208	+ SQUASHFS_NOI)
	3209	+
	3210	+#define SQUASHFS_UNCOMPRESSED_DATA(flags) SQUASHFS_BIT(flags, \
	3211	+ SQUASHFS_NOD)
	3212	+
	3213	+#define SQUASHFS_UNCOMPRESSED_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
	3214	+ SQUASHFS_NOF)
	3215	+
	3216	+#define SQUASHFS_NO_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
	3217	+ SQUASHFS_NO_FRAG)
	3218	+
	3219	+#define SQUASHFS_ALWAYS_FRAGMENTS(flags) SQUASHFS_BIT(flags, \
	3220	+ SQUASHFS_ALWAYS_FRAG)
	3221	+
	3222	+#define SQUASHFS_DUPLICATES(flags) SQUASHFS_BIT(flags, \
	3223	+ SQUASHFS_DUPLICATE)
	3224	+
	3225	+#define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, \
	3226	+ SQUASHFS_CHECK)
	3227	+
	3228	+#define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, \
	3229	+ duplicate_checking) (noi \| (nod << 1) \| (check_data << 2) \
	3230	+ \| (nof << 3) \| (no_frag << 4) \| (always_frag << 5) \| \
	3231	+ (duplicate_checking << 6))
	3232	+
	3233	+/* Max number of types and file types */
	3234	+#define SQUASHFS_DIR_TYPE 1
	3235	+#define SQUASHFS_FILE_TYPE 2
	3236	+#define SQUASHFS_SYMLINK_TYPE 3
	3237	+#define SQUASHFS_BLKDEV_TYPE 4
	3238	+#define SQUASHFS_CHRDEV_TYPE 5
	3239	+#define SQUASHFS_FIFO_TYPE 6
	3240	+#define SQUASHFS_SOCKET_TYPE 7
	3241	+#define SQUASHFS_LDIR_TYPE 8
	3242	+#define SQUASHFS_LREG_TYPE 9
	3243	+
	3244	+/* 1.0 filesystem type definitions */
	3245	+#define SQUASHFS_TYPES 5
	3246	+#define SQUASHFS_IPC_TYPE 0
	3247	+
	3248	+/* Flag whether block is compressed or uncompressed, bit is set if block is
	3249	+ * uncompressed */
	3250	+#define SQUASHFS_COMPRESSED_BIT (1 << 15)
	3251	+
	3252	+#define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \
	3253	+ (B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT)
	3254	+
	3255	+#define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT))
	3256	+
	3257	+#define SQUASHFS_COMPRESSED_BIT_BLOCK (1 << 24)
	3258	+
	3259	+#define SQUASHFS_COMPRESSED_SIZE_BLOCK(B) (((B) & \
	3260	+ ~SQUASHFS_COMPRESSED_BIT_BLOCK) ? (B) & \
	3261	+ ~SQUASHFS_COMPRESSED_BIT_BLOCK : SQUASHFS_COMPRESSED_BIT_BLOCK)
	3262	+
	3263	+#define SQUASHFS_COMPRESSED_BLOCK(B) (!((B) & SQUASHFS_COMPRESSED_BIT_BLOCK))
	3264	+
	3265	+/*
	3266	+ * Inode number ops. Inodes consist of a compressed block number, and an
	3267	+ * uncompressed offset within that block
	3268	+ */
	3269	+#define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16))
	3270	+
	3271	+#define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff))
	3272	+
	3273	+#define SQUASHFS_MKINODE(A, B) ((squashfs_inode_t)(((squashfs_inode_t) (A)\
	3274	+ << 16) + (B)))
	3275	+
	3276	+/* Compute 32 bit VFS inode number from squashfs inode number */
	3277	+#define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + \
	3278	+ ((b) >> 2) + 1))
	3279	+/* XXX */
	3280	+
	3281	+/* Translate between VFS mode and squashfs mode */
	3282	+#define SQUASHFS_MODE(a) ((a) & 0xfff)
	3283	+
	3284	+/* fragment and fragment table defines */
	3285	+#define SQUASHFS_FRAGMENT_BYTES(A) (A * sizeof(struct squashfs_fragment_entry))
	3286	+
	3287	+#define SQUASHFS_FRAGMENT_INDEX(A) (SQUASHFS_FRAGMENT_BYTES(A) / \
	3288	+ SQUASHFS_METADATA_SIZE)
	3289	+
	3290	+#define SQUASHFS_FRAGMENT_INDEX_OFFSET(A) (SQUASHFS_FRAGMENT_BYTES(A) % \
	3291	+ SQUASHFS_METADATA_SIZE)
	3292	+
	3293	+#define SQUASHFS_FRAGMENT_INDEXES(A) ((SQUASHFS_FRAGMENT_BYTES(A) + \
	3294	+ SQUASHFS_METADATA_SIZE - 1) / \
	3295	+ SQUASHFS_METADATA_SIZE)
	3296	+
	3297	+#define SQUASHFS_FRAGMENT_INDEX_BYTES(A) (SQUASHFS_FRAGMENT_INDEXES(A) *\
	3298	+ sizeof(long long))
	3299	+
	3300	+/* cached data constants for filesystem */
	3301	+#define SQUASHFS_CACHED_BLKS 8
	3302	+
	3303	+#define SQUASHFS_MAX_FILE_SIZE_LOG 64
	3304	+
	3305	+#define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << \
	3306	+ (SQUASHFS_MAX_FILE_SIZE_LOG - 2))
	3307	+
	3308	+#define SQUASHFS_MARKER_BYTE 0xff
	3309	+
	3310	+/* meta index cache */
	3311	+#define SQUASHFS_META_INDEXES (SQUASHFS_METADATA_SIZE / sizeof(unsigned int))
	3312	+#define SQUASHFS_META_ENTRIES 31
	3313	+#define SQUASHFS_META_NUMBER 8
	3314	+#define SQUASHFS_SLOTS 4
	3315	+
	3316	+struct meta_entry {
	3317	+ long long data_block;
	3318	+ unsigned int index_block;
	3319	+ unsigned short offset;
	3320	+ unsigned short pad;
	3321	+};
	3322	+
	3323	+struct meta_index {
	3324	+ unsigned int inode_number;
	3325	+ unsigned int offset;
	3326	+ unsigned short entries;
	3327	+ unsigned short skip;
	3328	+ unsigned short locked;
	3329	+ unsigned short pad;
	3330	+ struct meta_entry meta_entry[SQUASHFS_META_ENTRIES];
	3331	+};
	3332	+
	3333	+
	3334	+/*
	3335	+ * definitions for structures on disk
	3336	+ */
	3337	+
	3338	+typedef long long squashfs_block_t;
	3339	+typedef long long squashfs_inode_t;
	3340	+
	3341	+struct squashfs_super_block {
	3342	+ unsigned int s_magic;
	3343	+ unsigned int inodes;
	3344	+ unsigned int bytes_used_2;
	3345	+ unsigned int uid_start_2;
	3346	+ unsigned int guid_start_2;
	3347	+ unsigned int inode_table_start_2;
	3348	+ unsigned int directory_table_start_2;
	3349	+ unsigned int s_major:16;
	3350	+ unsigned int s_minor:16;
	3351	+ unsigned int block_size_1:16;
	3352	+ unsigned int block_log:16;
	3353	+ unsigned int flags:8;
	3354	+ unsigned int no_uids:8;
	3355	+ unsigned int no_guids:8;
	3356	+ unsigned int mkfs_time /* time of filesystem creation */;
	3357	+ squashfs_inode_t root_inode;
	3358	+ unsigned int block_size;
	3359	+ unsigned int fragments;
	3360	+ unsigned int fragment_table_start_2;
	3361	+ long long bytes_used;
	3362	+ long long uid_start;
	3363	+ long long guid_start;
	3364	+ long long inode_table_start;
	3365	+ long long directory_table_start;
	3366	+ long long fragment_table_start;
	3367	+ long long unused;
	3368	+} __attribute__ ((packed));
	3369	+
	3370	+struct squashfs_dir_index {
	3371	+ unsigned int index;
	3372	+ unsigned int start_block;
	3373	+ unsigned char size;
	3374	+ unsigned char name[0];
	3375	+} __attribute__ ((packed));
	3376	+
	3377	+#define SQUASHFS_BASE_INODE_HEADER \
	3378	+ unsigned int inode_type:4; \
	3379	+ unsigned int mode:12; \
	3380	+ unsigned int uid:8; \
	3381	+ unsigned int guid:8; \
	3382	+ unsigned int mtime; \
	3383	+ unsigned int inode_number;
	3384	+
	3385	+struct squashfs_base_inode_header {
	3386	+ SQUASHFS_BASE_INODE_HEADER;
	3387	+} __attribute__ ((packed));
	3388	+
	3389	+struct squashfs_ipc_inode_header {
	3390	+ SQUASHFS_BASE_INODE_HEADER;
	3391	+ unsigned int nlink;
	3392	+} __attribute__ ((packed));
	3393	+
	3394	+struct squashfs_dev_inode_header {
	3395	+ SQUASHFS_BASE_INODE_HEADER;
	3396	+ unsigned int nlink;
	3397	+ unsigned short rdev;
	3398	+} __attribute__ ((packed));
	3399	+
	3400	+struct squashfs_symlink_inode_header {
	3401	+ SQUASHFS_BASE_INODE_HEADER;
	3402	+ unsigned int nlink;
	3403	+ unsigned short symlink_size;
	3404	+ char symlink[0];
	3405	+} __attribute__ ((packed));
	3406	+
	3407	+struct squashfs_reg_inode_header {
	3408	+ SQUASHFS_BASE_INODE_HEADER;
	3409	+ squashfs_block_t start_block;
	3410	+ unsigned int fragment;
	3411	+ unsigned int offset;
	3412	+ unsigned int file_size;
	3413	+ unsigned short block_list[0];
	3414	+} __attribute__ ((packed));
	3415	+
	3416	+struct squashfs_lreg_inode_header {
	3417	+ SQUASHFS_BASE_INODE_HEADER;
	3418	+ unsigned int nlink;
	3419	+ squashfs_block_t start_block;
	3420	+ unsigned int fragment;
	3421	+ unsigned int offset;
	3422	+ long long file_size;
	3423	+ unsigned short block_list[0];
	3424	+} __attribute__ ((packed));
	3425	+
	3426	+struct squashfs_dir_inode_header {
	3427	+ SQUASHFS_BASE_INODE_HEADER;
	3428	+ unsigned int nlink;
	3429	+ unsigned int file_size:19;
	3430	+ unsigned int offset:13;
	3431	+ unsigned int start_block;
	3432	+ unsigned int parent_inode;
	3433	+} __attribute__ ((packed));
	3434	+
	3435	+struct squashfs_ldir_inode_header {
	3436	+ SQUASHFS_BASE_INODE_HEADER;
	3437	+ unsigned int nlink;
	3438	+ unsigned int file_size:27;
	3439	+ unsigned int offset:13;
	3440	+ unsigned int start_block;
	3441	+ unsigned int i_count:16;
	3442	+ unsigned int parent_inode;
	3443	+ struct squashfs_dir_index index[0];
	3444	+} __attribute__ ((packed));
	3445	+
	3446	+union squashfs_inode_header {
	3447	+ struct squashfs_base_inode_header base;
	3448	+ struct squashfs_dev_inode_header dev;
	3449	+ struct squashfs_symlink_inode_header symlink;
	3450	+ struct squashfs_reg_inode_header reg;
	3451	+ struct squashfs_lreg_inode_header lreg;
	3452	+ struct squashfs_dir_inode_header dir;
	3453	+ struct squashfs_ldir_inode_header ldir;
	3454	+ struct squashfs_ipc_inode_header ipc;
	3455	+};
	3456	+
	3457	+struct squashfs_dir_entry {
	3458	+ unsigned int offset:13;
	3459	+ unsigned int type:3;
	3460	+ unsigned int size:8;
	3461	+ int inode_number:16;
	3462	+ char name[0];
	3463	+} __attribute__ ((packed));
	3464	+
	3465	+struct squashfs_dir_header {
	3466	+ unsigned int count:8;
	3467	+ unsigned int start_block;
	3468	+ unsigned int inode_number;
	3469	+} __attribute__ ((packed));
	3470	+
	3471	+struct squashfs_fragment_entry {
	3472	+ long long start_block;
	3473	+ unsigned int size;
	3474	+ unsigned int unused;
	3475	+} __attribute__ ((packed));
	3476	+
	3477	+extern int squashfs_uncompress_block(void d, int dstlen, void s, int srclen);
	3478	+extern int squashfs_uncompress_init(void);
	3479	+extern int squashfs_uncompress_exit(void);
	3480	+
	3481	+/*
	3482	+ * macros to convert each packed bitfield structure from little endian to big
	3483	+ * endian and vice versa. These are needed when creating or using a filesystem
	3484	+ * on a machine with different byte ordering to the target architecture.
	3485	+ *
	3486	+ */
	3487	+
	3488	+#define SQUASHFS_SWAP_START \
	3489	+ int bits;\
	3490	+ int b_pos;\
	3491	+ unsigned long long val;\
	3492	+ unsigned char *s;\
	3493	+ unsigned char *d;
	3494	+
	3495	+#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\
	3496	+ SQUASHFS_SWAP_START\
	3497	+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_super_block));\
	3498	+ SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\
	3499	+ SQUASHFS_SWAP((s)->inodes, d, 32, 32);\
	3500	+ SQUASHFS_SWAP((s)->bytes_used_2, d, 64, 32);\
	3501	+ SQUASHFS_SWAP((s)->uid_start_2, d, 96, 32);\
	3502	+ SQUASHFS_SWAP((s)->guid_start_2, d, 128, 32);\
	3503	+ SQUASHFS_SWAP((s)->inode_table_start_2, d, 160, 32);\
	3504	+ SQUASHFS_SWAP((s)->directory_table_start_2, d, 192, 32);\
	3505	+ SQUASHFS_SWAP((s)->s_major, d, 224, 16);\
	3506	+ SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\
	3507	+ SQUASHFS_SWAP((s)->block_size_1, d, 256, 16);\
	3508	+ SQUASHFS_SWAP((s)->block_log, d, 272, 16);\
	3509	+ SQUASHFS_SWAP((s)->flags, d, 288, 8);\
	3510	+ SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\
	3511	+ SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\
	3512	+ SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\
	3513	+ SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\
	3514	+ SQUASHFS_SWAP((s)->block_size, d, 408, 32);\
	3515	+ SQUASHFS_SWAP((s)->fragments, d, 440, 32);\
	3516	+ SQUASHFS_SWAP((s)->fragment_table_start_2, d, 472, 32);\
	3517	+ SQUASHFS_SWAP((s)->bytes_used, d, 504, 64);\
	3518	+ SQUASHFS_SWAP((s)->uid_start, d, 568, 64);\
	3519	+ SQUASHFS_SWAP((s)->guid_start, d, 632, 64);\
	3520	+ SQUASHFS_SWAP((s)->inode_table_start, d, 696, 64);\
	3521	+ SQUASHFS_SWAP((s)->directory_table_start, d, 760, 64);\
	3522	+ SQUASHFS_SWAP((s)->fragment_table_start, d, 824, 64);\
	3523	+ SQUASHFS_SWAP((s)->unused, d, 888, 64);\
	3524	+}
	3525	+
	3526	+#define SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
	3527	+ SQUASHFS_MEMSET(s, d, n);\
	3528	+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
	3529	+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
	3530	+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\
	3531	+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\
	3532	+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
	3533	+ SQUASHFS_SWAP((s)->inode_number, d, 64, 32);
	3534	+
	3535	+#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\
	3536	+ SQUASHFS_SWAP_START\
	3537	+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\
	3538	+}
	3539	+
	3540	+#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) {\
	3541	+ SQUASHFS_SWAP_START\
	3542	+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
	3543	+ sizeof(struct squashfs_ipc_inode_header))\
	3544	+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
	3545	+}
	3546	+
	3547	+#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\
	3548	+ SQUASHFS_SWAP_START\
	3549	+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
	3550	+ sizeof(struct squashfs_dev_inode_header)); \
	3551	+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
	3552	+ SQUASHFS_SWAP((s)->rdev, d, 128, 16);\
	3553	+}
	3554	+
	3555	+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\
	3556	+ SQUASHFS_SWAP_START\
	3557	+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
	3558	+ sizeof(struct squashfs_symlink_inode_header));\
	3559	+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
	3560	+ SQUASHFS_SWAP((s)->symlink_size, d, 128, 16);\
	3561	+}
	3562	+
	3563	+#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\
	3564	+ SQUASHFS_SWAP_START\
	3565	+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
	3566	+ sizeof(struct squashfs_reg_inode_header));\
	3567	+ SQUASHFS_SWAP((s)->start_block, d, 96, 64);\
	3568	+ SQUASHFS_SWAP((s)->fragment, d, 160, 32);\
	3569	+ SQUASHFS_SWAP((s)->offset, d, 192, 32);\
	3570	+ SQUASHFS_SWAP((s)->file_size, d, 224, 32);\
	3571	+}
	3572	+
	3573	+#define SQUASHFS_SWAP_LREG_INODE_HEADER(s, d) {\
	3574	+ SQUASHFS_SWAP_START\
	3575	+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
	3576	+ sizeof(struct squashfs_lreg_inode_header));\
	3577	+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
	3578	+ SQUASHFS_SWAP((s)->start_block, d, 128, 64);\
	3579	+ SQUASHFS_SWAP((s)->fragment, d, 192, 32);\
	3580	+ SQUASHFS_SWAP((s)->offset, d, 224, 32);\
	3581	+ SQUASHFS_SWAP((s)->file_size, d, 256, 64);\
	3582	+}
	3583	+
	3584	+#define SQUASHFS_SWAP_DIR_INODE_HEADER(s, d) {\
	3585	+ SQUASHFS_SWAP_START\
	3586	+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
	3587	+ sizeof(struct squashfs_dir_inode_header));\
	3588	+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
	3589	+ SQUASHFS_SWAP((s)->file_size, d, 128, 19);\
	3590	+ SQUASHFS_SWAP((s)->offset, d, 147, 13);\
	3591	+ SQUASHFS_SWAP((s)->start_block, d, 160, 32);\
	3592	+ SQUASHFS_SWAP((s)->parent_inode, d, 192, 32);\
	3593	+}
	3594	+
	3595	+#define SQUASHFS_SWAP_LDIR_INODE_HEADER(s, d) {\
	3596	+ SQUASHFS_SWAP_START\
	3597	+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \
	3598	+ sizeof(struct squashfs_ldir_inode_header));\
	3599	+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\
	3600	+ SQUASHFS_SWAP((s)->file_size, d, 128, 27);\
	3601	+ SQUASHFS_SWAP((s)->offset, d, 155, 13);\
	3602	+ SQUASHFS_SWAP((s)->start_block, d, 168, 32);\
	3603	+ SQUASHFS_SWAP((s)->i_count, d, 200, 16);\
	3604	+ SQUASHFS_SWAP((s)->parent_inode, d, 216, 32);\
	3605	+}
	3606	+
	3607	+#define SQUASHFS_SWAP_DIR_INDEX(s, d) {\
	3608	+ SQUASHFS_SWAP_START\
	3609	+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index));\
	3610	+ SQUASHFS_SWAP((s)->index, d, 0, 32);\
	3611	+ SQUASHFS_SWAP((s)->start_block, d, 32, 32);\
	3612	+ SQUASHFS_SWAP((s)->size, d, 64, 8);\
	3613	+}
	3614	+
	3615	+#define SQUASHFS_SWAP_DIR_HEADER(s, d) {\
	3616	+ SQUASHFS_SWAP_START\
	3617	+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header));\
	3618	+ SQUASHFS_SWAP((s)->count, d, 0, 8);\
	3619	+ SQUASHFS_SWAP((s)->start_block, d, 8, 32);\
	3620	+ SQUASHFS_SWAP((s)->inode_number, d, 40, 32);\
	3621	+}
	3622	+
	3623	+#define SQUASHFS_SWAP_DIR_ENTRY(s, d) {\
	3624	+ SQUASHFS_SWAP_START\
	3625	+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry));\
	3626	+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\
	3627	+ SQUASHFS_SWAP((s)->type, d, 13, 3);\
	3628	+ SQUASHFS_SWAP((s)->size, d, 16, 8);\
	3629	+ SQUASHFS_SWAP((s)->inode_number, d, 24, 16);\
	3630	+}
	3631	+
	3632	+#define SQUASHFS_SWAP_FRAGMENT_ENTRY(s, d) {\
	3633	+ SQUASHFS_SWAP_START\
	3634	+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry));\
	3635	+ SQUASHFS_SWAP((s)->start_block, d, 0, 64);\
	3636	+ SQUASHFS_SWAP((s)->size, d, 64, 32);\
	3637	+}
	3638	+
	3639	+#define SQUASHFS_SWAP_SHORTS(s, d, n) {\
	3640	+ int entry;\
	3641	+ int bit_position;\
	3642	+ SQUASHFS_SWAP_START\
	3643	+ SQUASHFS_MEMSET(s, d, n * 2);\
	3644	+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
	3645	+ 16)\
	3646	+ SQUASHFS_SWAP(s[entry], d, bit_position, 16);\
	3647	+}
	3648	+
	3649	+#define SQUASHFS_SWAP_INTS(s, d, n) {\
	3650	+ int entry;\
	3651	+ int bit_position;\
	3652	+ SQUASHFS_SWAP_START\
	3653	+ SQUASHFS_MEMSET(s, d, n * 4);\
	3654	+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
	3655	+ 32)\
	3656	+ SQUASHFS_SWAP(s[entry], d, bit_position, 32);\
	3657	+}
	3658	+
	3659	+#define SQUASHFS_SWAP_LONG_LONGS(s, d, n) {\
	3660	+ int entry;\
	3661	+ int bit_position;\
	3662	+ SQUASHFS_SWAP_START\
	3663	+ SQUASHFS_MEMSET(s, d, n * 8);\
	3664	+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
	3665	+ 64)\
	3666	+ SQUASHFS_SWAP(s[entry], d, bit_position, 64);\
	3667	+}
	3668	+
	3669	+#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\
	3670	+ int entry;\
	3671	+ int bit_position;\
	3672	+ SQUASHFS_SWAP_START\
	3673	+ SQUASHFS_MEMSET(s, d, n * bits / 8);\
	3674	+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \
	3675	+ bits)\
	3676	+ SQUASHFS_SWAP(s[entry], d, bit_position, bits);\
	3677	+}
	3678	+
	3679	+#define SQUASHFS_SWAP_FRAGMENT_INDEXES(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n)
	3680	+
	3681	+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY
	3682	+
	3683	+struct squashfs_base_inode_header_1 {
	3684	+ unsigned int inode_type:4;
	3685	+ unsigned int mode:12; /* protection */
	3686	+ unsigned int uid:4; /* index into uid table */
	3687	+ unsigned int guid:4; /* index into guid table */
	3688	+} __attribute__ ((packed));
	3689	+
	3690	+struct squashfs_ipc_inode_header_1 {
	3691	+ unsigned int inode_type:4;
	3692	+ unsigned int mode:12; /* protection */
	3693	+ unsigned int uid:4; /* index into uid table */
	3694	+ unsigned int guid:4; /* index into guid table */
	3695	+ unsigned int type:4;
	3696	+ unsigned int offset:4;
	3697	+} __attribute__ ((packed));
	3698	+
	3699	+struct squashfs_dev_inode_header_1 {
	3700	+ unsigned int inode_type:4;
	3701	+ unsigned int mode:12; /* protection */
	3702	+ unsigned int uid:4; /* index into uid table */
	3703	+ unsigned int guid:4; /* index into guid table */
	3704	+ unsigned short rdev;
	3705	+} __attribute__ ((packed));
	3706	+
	3707	+struct squashfs_symlink_inode_header_1 {
	3708	+ unsigned int inode_type:4;
	3709	+ unsigned int mode:12; /* protection */
	3710	+ unsigned int uid:4; /* index into uid table */
	3711	+ unsigned int guid:4; /* index into guid table */
	3712	+ unsigned short symlink_size;
	3713	+ char symlink[0];
	3714	+} __attribute__ ((packed));
	3715	+
	3716	+struct squashfs_reg_inode_header_1 {
	3717	+ unsigned int inode_type:4;
	3718	+ unsigned int mode:12; /* protection */
	3719	+ unsigned int uid:4; /* index into uid table */
	3720	+ unsigned int guid:4; /* index into guid table */
	3721	+ unsigned int mtime;
	3722	+ unsigned int start_block;
	3723	+ unsigned int file_size:32;
	3724	+ unsigned short block_list[0];
	3725	+} __attribute__ ((packed));
	3726	+
	3727	+struct squashfs_dir_inode_header_1 {
	3728	+ unsigned int inode_type:4;
	3729	+ unsigned int mode:12; /* protection */
	3730	+ unsigned int uid:4; /* index into uid table */
	3731	+ unsigned int guid:4; /* index into guid table */
	3732	+ unsigned int file_size:19;
	3733	+ unsigned int offset:13;
	3734	+ unsigned int mtime;
	3735	+ unsigned int start_block:24;
	3736	+} __attribute__ ((packed));
	3737	+
	3738	+#define SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n) \
	3739	+ SQUASHFS_MEMSET(s, d, n);\
	3740	+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
	3741	+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
	3742	+ SQUASHFS_SWAP((s)->uid, d, 16, 4);\
	3743	+ SQUASHFS_SWAP((s)->guid, d, 20, 4);
	3744	+
	3745	+#define SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, n) {\
	3746	+ SQUASHFS_SWAP_START\
	3747	+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n)\
	3748	+}
	3749	+
	3750	+#define SQUASHFS_SWAP_IPC_INODE_HEADER_1(s, d) {\
	3751	+ SQUASHFS_SWAP_START\
	3752	+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
	3753	+ sizeof(struct squashfs_ipc_inode_header_1));\
	3754	+ SQUASHFS_SWAP((s)->type, d, 24, 4);\
	3755	+ SQUASHFS_SWAP((s)->offset, d, 28, 4);\
	3756	+}
	3757	+
	3758	+#define SQUASHFS_SWAP_DEV_INODE_HEADER_1(s, d) {\
	3759	+ SQUASHFS_SWAP_START\
	3760	+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
	3761	+ sizeof(struct squashfs_dev_inode_header_1));\
	3762	+ SQUASHFS_SWAP((s)->rdev, d, 24, 16);\
	3763	+}
	3764	+
	3765	+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(s, d) {\
	3766	+ SQUASHFS_SWAP_START\
	3767	+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
	3768	+ sizeof(struct squashfs_symlink_inode_header_1));\
	3769	+ SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\
	3770	+}
	3771	+
	3772	+#define SQUASHFS_SWAP_REG_INODE_HEADER_1(s, d) {\
	3773	+ SQUASHFS_SWAP_START\
	3774	+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
	3775	+ sizeof(struct squashfs_reg_inode_header_1));\
	3776	+ SQUASHFS_SWAP((s)->mtime, d, 24, 32);\
	3777	+ SQUASHFS_SWAP((s)->start_block, d, 56, 32);\
	3778	+ SQUASHFS_SWAP((s)->file_size, d, 88, 32);\
	3779	+}
	3780	+
	3781	+#define SQUASHFS_SWAP_DIR_INODE_HEADER_1(s, d) {\
	3782	+ SQUASHFS_SWAP_START\
	3783	+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \
	3784	+ sizeof(struct squashfs_dir_inode_header_1));\
	3785	+ SQUASHFS_SWAP((s)->file_size, d, 24, 19);\
	3786	+ SQUASHFS_SWAP((s)->offset, d, 43, 13);\
	3787	+ SQUASHFS_SWAP((s)->mtime, d, 56, 32);\
	3788	+ SQUASHFS_SWAP((s)->start_block, d, 88, 24);\
	3789	+}
	3790	+
	3791	+#endif
	3792	+
	3793	+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY
	3794	+
	3795	+struct squashfs_dir_index_2 {
	3796	+ unsigned int index:27;
	3797	+ unsigned int start_block:29;
	3798	+ unsigned char size;
	3799	+ unsigned char name[0];
	3800	+} __attribute__ ((packed));
	3801	+
	3802	+struct squashfs_base_inode_header_2 {
	3803	+ unsigned int inode_type:4;
	3804	+ unsigned int mode:12; /* protection */
	3805	+ unsigned int uid:8; /* index into uid table */
	3806	+ unsigned int guid:8; /* index into guid table */
	3807	+} __attribute__ ((packed));
	3808	+
	3809	+struct squashfs_ipc_inode_header_2 {
	3810	+ unsigned int inode_type:4;
	3811	+ unsigned int mode:12; /* protection */
	3812	+ unsigned int uid:8; /* index into uid table */
	3813	+ unsigned int guid:8; /* index into guid table */
	3814	+} __attribute__ ((packed));
	3815	+
	3816	+struct squashfs_dev_inode_header_2 {
	3817	+ unsigned int inode_type:4;
	3818	+ unsigned int mode:12; /* protection */
	3819	+ unsigned int uid:8; /* index into uid table */
	3820	+ unsigned int guid:8; /* index into guid table */
	3821	+ unsigned short rdev;
	3822	+} __attribute__ ((packed));
	3823	+
	3824	+struct squashfs_symlink_inode_header_2 {
	3825	+ unsigned int inode_type:4;
	3826	+ unsigned int mode:12; /* protection */
	3827	+ unsigned int uid:8; /* index into uid table */
	3828	+ unsigned int guid:8; /* index into guid table */
	3829	+ unsigned short symlink_size;
	3830	+ char symlink[0];
	3831	+} __attribute__ ((packed));
	3832	+
	3833	+struct squashfs_reg_inode_header_2 {
	3834	+ unsigned int inode_type:4;
	3835	+ unsigned int mode:12; /* protection */
	3836	+ unsigned int uid:8; /* index into uid table */
	3837	+ unsigned int guid:8; /* index into guid table */
	3838	+ unsigned int mtime;
	3839	+ unsigned int start_block;
	3840	+ unsigned int fragment;
	3841	+ unsigned int offset;
	3842	+ unsigned int file_size:32;
	3843	+ unsigned short block_list[0];
	3844	+} __attribute__ ((packed));
	3845	+
	3846	+struct squashfs_dir_inode_header_2 {
	3847	+ unsigned int inode_type:4;
	3848	+ unsigned int mode:12; /* protection */
	3849	+ unsigned int uid:8; /* index into uid table */
	3850	+ unsigned int guid:8; /* index into guid table */
	3851	+ unsigned int file_size:19;
	3852	+ unsigned int offset:13;
	3853	+ unsigned int mtime;
	3854	+ unsigned int start_block:24;
	3855	+} __attribute__ ((packed));
	3856	+
	3857	+struct squashfs_ldir_inode_header_2 {
	3858	+ unsigned int inode_type:4;
	3859	+ unsigned int mode:12; /* protection */
	3860	+ unsigned int uid:8; /* index into uid table */
	3861	+ unsigned int guid:8; /* index into guid table */
	3862	+ unsigned int file_size:27;
	3863	+ unsigned int offset:13;
	3864	+ unsigned int mtime;
	3865	+ unsigned int start_block:24;
	3866	+ unsigned int i_count:16;
	3867	+ struct squashfs_dir_index_2 index[0];
	3868	+} __attribute__ ((packed));
	3869	+
	3870	+union squashfs_inode_header_2 {
	3871	+ struct squashfs_base_inode_header_2 base;
	3872	+ struct squashfs_dev_inode_header_2 dev;
	3873	+ struct squashfs_symlink_inode_header_2 symlink;
	3874	+ struct squashfs_reg_inode_header_2 reg;
	3875	+ struct squashfs_dir_inode_header_2 dir;
	3876	+ struct squashfs_ldir_inode_header_2 ldir;
	3877	+ struct squashfs_ipc_inode_header_2 ipc;
	3878	+};
	3879	+
	3880	+struct squashfs_dir_header_2 {
	3881	+ unsigned int count:8;
	3882	+ unsigned int start_block:24;
	3883	+} __attribute__ ((packed));
	3884	+
	3885	+struct squashfs_dir_entry_2 {
	3886	+ unsigned int offset:13;
	3887	+ unsigned int type:3;
	3888	+ unsigned int size:8;
	3889	+ char name[0];
	3890	+} __attribute__ ((packed));
	3891	+
	3892	+struct squashfs_fragment_entry_2 {
	3893	+ unsigned int start_block;
	3894	+ unsigned int size;
	3895	+} __attribute__ ((packed));
	3896	+
	3897	+#define SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
	3898	+ SQUASHFS_MEMSET(s, d, n);\
	3899	+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
	3900	+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
	3901	+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\
	3902	+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\
	3903	+
	3904	+#define SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, n) {\
	3905	+ SQUASHFS_SWAP_START\
	3906	+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\
	3907	+}
	3908	+
	3909	+#define SQUASHFS_SWAP_IPC_INODE_HEADER_2(s, d) \
	3910	+ SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, sizeof(struct squashfs_ipc_inode_header_2))
	3911	+
	3912	+#define SQUASHFS_SWAP_DEV_INODE_HEADER_2(s, d) {\
	3913	+ SQUASHFS_SWAP_START\
	3914	+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
	3915	+ sizeof(struct squashfs_dev_inode_header_2)); \
	3916	+ SQUASHFS_SWAP((s)->rdev, d, 32, 16);\
	3917	+}
	3918	+
	3919	+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(s, d) {\
	3920	+ SQUASHFS_SWAP_START\
	3921	+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
	3922	+ sizeof(struct squashfs_symlink_inode_header_2));\
	3923	+ SQUASHFS_SWAP((s)->symlink_size, d, 32, 16);\
	3924	+}
	3925	+
	3926	+#define SQUASHFS_SWAP_REG_INODE_HEADER_2(s, d) {\
	3927	+ SQUASHFS_SWAP_START\
	3928	+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
	3929	+ sizeof(struct squashfs_reg_inode_header_2));\
	3930	+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
	3931	+ SQUASHFS_SWAP((s)->start_block, d, 64, 32);\
	3932	+ SQUASHFS_SWAP((s)->fragment, d, 96, 32);\
	3933	+ SQUASHFS_SWAP((s)->offset, d, 128, 32);\
	3934	+ SQUASHFS_SWAP((s)->file_size, d, 160, 32);\
	3935	+}
	3936	+
	3937	+#define SQUASHFS_SWAP_DIR_INODE_HEADER_2(s, d) {\
	3938	+ SQUASHFS_SWAP_START\
	3939	+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
	3940	+ sizeof(struct squashfs_dir_inode_header_2));\
	3941	+ SQUASHFS_SWAP((s)->file_size, d, 32, 19);\
	3942	+ SQUASHFS_SWAP((s)->offset, d, 51, 13);\
	3943	+ SQUASHFS_SWAP((s)->mtime, d, 64, 32);\
	3944	+ SQUASHFS_SWAP((s)->start_block, d, 96, 24);\
	3945	+}
	3946	+
	3947	+#define SQUASHFS_SWAP_LDIR_INODE_HEADER_2(s, d) {\
	3948	+ SQUASHFS_SWAP_START\
	3949	+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \
	3950	+ sizeof(struct squashfs_ldir_inode_header_2));\
	3951	+ SQUASHFS_SWAP((s)->file_size, d, 32, 27);\
	3952	+ SQUASHFS_SWAP((s)->offset, d, 59, 13);\
	3953	+ SQUASHFS_SWAP((s)->mtime, d, 72, 32);\
	3954	+ SQUASHFS_SWAP((s)->start_block, d, 104, 24);\
	3955	+ SQUASHFS_SWAP((s)->i_count, d, 128, 16);\
	3956	+}
	3957	+
	3958	+#define SQUASHFS_SWAP_DIR_INDEX_2(s, d) {\
	3959	+ SQUASHFS_SWAP_START\
	3960	+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index_2));\
	3961	+ SQUASHFS_SWAP((s)->index, d, 0, 27);\
	3962	+ SQUASHFS_SWAP((s)->start_block, d, 27, 29);\
	3963	+ SQUASHFS_SWAP((s)->size, d, 56, 8);\
	3964	+}
	3965	+#define SQUASHFS_SWAP_DIR_HEADER_2(s, d) {\
	3966	+ SQUASHFS_SWAP_START\
	3967	+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header_2));\
	3968	+ SQUASHFS_SWAP((s)->count, d, 0, 8);\
	3969	+ SQUASHFS_SWAP((s)->start_block, d, 8, 24);\
	3970	+}
	3971	+
	3972	+#define SQUASHFS_SWAP_DIR_ENTRY_2(s, d) {\
	3973	+ SQUASHFS_SWAP_START\
	3974	+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry_2));\
	3975	+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\
	3976	+ SQUASHFS_SWAP((s)->type, d, 13, 3);\
	3977	+ SQUASHFS_SWAP((s)->size, d, 16, 8);\
	3978	+}
	3979	+
	3980	+#define SQUASHFS_SWAP_FRAGMENT_ENTRY_2(s, d) {\
	3981	+ SQUASHFS_SWAP_START\
	3982	+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry_2));\
	3983	+ SQUASHFS_SWAP((s)->start_block, d, 0, 32);\
	3984	+ SQUASHFS_SWAP((s)->size, d, 32, 32);\
	3985	+}
	3986	+
	3987	+#define SQUASHFS_SWAP_FRAGMENT_INDEXES_2(s, d, n) SQUASHFS_SWAP_INTS(s, d, n)
	3988	+
	3989	+/* fragment and fragment table defines */
	3990	+#define SQUASHFS_FRAGMENT_BYTES_2(A) (A * sizeof(struct squashfs_fragment_entry_2))
	3991	+
	3992	+#define SQUASHFS_FRAGMENT_INDEX_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) / \
	3993	+ SQUASHFS_METADATA_SIZE)
	3994	+
	3995	+#define SQUASHFS_FRAGMENT_INDEX_OFFSET_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) % \
	3996	+ SQUASHFS_METADATA_SIZE)
	3997	+
	3998	+#define SQUASHFS_FRAGMENT_INDEXES_2(A) ((SQUASHFS_FRAGMENT_BYTES_2(A) + \
	3999	+ SQUASHFS_METADATA_SIZE - 1) / \
	4000	+ SQUASHFS_METADATA_SIZE)
	4001	+
	4002	+#define SQUASHFS_FRAGMENT_INDEX_BYTES_2(A) (SQUASHFS_FRAGMENT_INDEXES_2(A) *\
	4003	+ sizeof(int))
	4004	+
	4005	+#endif
	4006	+
	4007	+#ifdef __KERNEL__
	4008	+
	4009	+/*
	4010	+ * macros used to swap each structure entry, taking into account
	4011	+ * bitfields and different bitfield placing conventions on differing
	4012	+ * architectures
	4013	+ */
	4014	+
	4015	+#include <asm/byteorder.h>
	4016	+
	4017	+#ifdef __BIG_ENDIAN
	4018	+ /* convert from little endian to big endian */
	4019	+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \
	4020	+ tbits, b_pos)
	4021	+#else
	4022	+ /* convert from big endian to little endian */
	4023	+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \
	4024	+ tbits, 64 - tbits - b_pos)
	4025	+#endif
	4026	+
	4027	+#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\
	4028	+ b_pos = pos % 8;\
	4029	+ val = 0;\
	4030	+ s = (unsigned char *)p + (pos / 8);\
	4031	+ d = ((unsigned char *) &val) + 7;\
	4032	+ for(bits = 0; bits < (tbits + b_pos); bits += 8) \
	4033	+ d-- = s++;\
	4034	+ value = (val >> (SHIFT))/* & ((1 << tbits) - 1)*/;\
	4035	+}
	4036	+
	4037	+#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n);
	4038	+
	4039	+#endif
	4040	+#endif
	4041	diff -Nru linux-2.6.19.ori2/include/linux/squashfs_fs_i.h linux-2.6.19.ori/include/linux/squashfs_fs_i.h
	4042	--- linux-2.6.19.ori2/include/linux/squashfs_fs_i.h 1970-01-01 01:00:00.000000000 +0100
	4043	+++ linux-2.6.19.ori/include/linux/squashfs_fs_i.h 2006-12-03 00:12:36.000000000 +0100
	4044	@@ -0,0 +1,45 @@
	4045	+#ifndef SQUASHFS_FS_I
	4046	+#define SQUASHFS_FS_I
	4047	+/*
	4048	+ * Squashfs
	4049	+ *
	4050	+ * Copyright (c) 2002, 2003, 2004, 2005, 2006
	4051	+ * Phillip Lougher <phillip@lougher.org.uk>
	4052	+ *
	4053	+ * This program is free software; you can redistribute it and/or
	4054	+ * modify it under the terms of the GNU General Public License
	4055	+ * as published by the Free Software Foundation; either version 2,
	4056	+ * or (at your option) any later version.
	4057	+ *
	4058	+ * This program is distributed in the hope that it will be useful,
	4059	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	4060	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	4061	+ * GNU General Public License for more details.
	4062	+ *
	4063	+ * You should have received a copy of the GNU General Public License
	4064	+ * along with this program; if not, write to the Free Software
	4065	+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	4066	+ *
	4067	+ * squashfs_fs_i.h
	4068	+ */
	4069	+
	4070	+struct squashfs_inode_info {
	4071	+ long long start_block;
	4072	+ unsigned int offset;
	4073	+ union {
	4074	+ struct {
	4075	+ long long fragment_start_block;
	4076	+ unsigned int fragment_size;
	4077	+ unsigned int fragment_offset;
	4078	+ long long block_list_start;
	4079	+ } s1;
	4080	+ struct {
	4081	+ long long directory_index_start;
	4082	+ unsigned int directory_index_offset;
	4083	+ unsigned int directory_index_count;
	4084	+ unsigned int parent_inode;
	4085	+ } s2;
	4086	+ } u;
	4087	+ struct inode vfs_inode;
	4088	+};
	4089	+#endif
	4090	diff -Nru linux-2.6.19.ori2/include/linux/squashfs_fs_sb.h linux-2.6.19.ori/include/linux/squashfs_fs_sb.h
	4091	--- linux-2.6.19.ori2/include/linux/squashfs_fs_sb.h 1970-01-01 01:00:00.000000000 +0100
	4092	+++ linux-2.6.19.ori/include/linux/squashfs_fs_sb.h 2006-12-03 00:12:36.000000000 +0100
	4093	@@ -0,0 +1,75 @@
	4094	+#ifndef SQUASHFS_FS_SB
	4095	+#define SQUASHFS_FS_SB
	4096	+/*
	4097	+ * Squashfs
	4098	+ *
	4099	+ * Copyright (c) 2002, 2003, 2004, 2005, 2006
	4100	+ * Phillip Lougher <phillip@lougher.org.uk>
	4101	+ *
	4102	+ * This program is free software; you can redistribute it and/or
	4103	+ * modify it under the terms of the GNU General Public License
	4104	+ * as published by the Free Software Foundation; either version 2,
	4105	+ * or (at your option) any later version.
	4106	+ *
	4107	+ * This program is distributed in the hope that it will be useful,
	4108	+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
	4109	+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	4110	+ * GNU General Public License for more details.
	4111	+ *
	4112	+ * You should have received a copy of the GNU General Public License
	4113	+ * along with this program; if not, write to the Free Software
	4114	+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	4115	+ *
	4116	+ * squashfs_fs_sb.h
	4117	+ */
	4118	+
	4119	+#include <linux/squashfs_fs.h>
	4120	+
	4121	+struct squashfs_cache {
	4122	+ long long block;
	4123	+ int length;
	4124	+ long long next_index;
	4125	+ char *data;
	4126	+};
	4127	+
	4128	+struct squashfs_fragment_cache {
	4129	+ long long block;
	4130	+ int length;
	4131	+ unsigned int locked;
	4132	+ char *data;
	4133	+};
	4134	+
	4135	+struct squashfs_sb_info {
	4136	+ struct squashfs_super_block sblk;
	4137	+ int devblksize;
	4138	+ int devblksize_log2;
	4139	+ int swap;
	4140	+ struct squashfs_cache *block_cache;
	4141	+ struct squashfs_fragment_cache *fragment;
	4142	+ int next_cache;
	4143	+ int next_fragment;
	4144	+ int next_meta_index;
	4145	+ unsigned int *uid;
	4146	+ unsigned int *guid;
	4147	+ long long *fragment_index;
	4148	+ unsigned int *fragment_index_2;
	4149	+ unsigned int read_size;
	4150	+ char *read_data;
	4151	+ char *read_page;
	4152	+ struct semaphore read_data_mutex;
	4153	+ struct semaphore read_page_mutex;
	4154	+ struct semaphore block_cache_mutex;
	4155	+ struct semaphore fragment_mutex;
	4156	+ struct semaphore meta_index_mutex;
	4157	+ wait_queue_head_t waitq;
	4158	+ wait_queue_head_t fragment_wait_queue;
	4159	+ struct meta_index *meta_index;
	4160	+ z_stream stream;
	4161	+ struct inode (iget)(struct super_block *s, squashfs_inode_t
	4162	+ inode);
	4163	+ long long (read_blocklist)(struct inode inode, int
	4164	+ index, int readahead_blks, char *block_list,
	4165	+ unsigned short *block_p, unsigned int bsize);
	4166	+ int (read_fragment_index_table)(struct super_block s);
	4167	+};
	4168	+#endif
	4169	diff -Nru linux-2.6.19.ori2/init/do_mounts_rd.c linux-2.6.19.ori/init/do_mounts_rd.c
	4170	--- linux-2.6.19.ori2/init/do_mounts_rd.c 2006-11-29 22:57:37.000000000 +0100
	4171	+++ linux-2.6.19.ori/init/do_mounts_rd.c 2006-12-03 00:12:36.000000000 +0100
	4172	@@ -5,6 +5,7 @@
	4173	#include <linux/ext2_fs.h>
	4174	#include <linux/romfs_fs.h>
	4175	#include <linux/cramfs_fs.h>
	4176	+#include <linux/squashfs_fs.h>
	4177	#include <linux/initrd.h>
	4178	#include <linux/string.h>
	4179
	4180	@@ -39,6 +40,7 @@
	4181	* numbers could not be found.
	4182	*
	4183	* We currently check for the following magic numbers:
	4184	+ * squashfs
	4185	* minix
	4186	* ext2
	4187	* romfs
	4188	@@ -53,6 +55,7 @@
	4189	struct ext2_super_block *ext2sb;
	4190	struct romfs_super_block *romfsb;
	4191	struct cramfs_super *cramfsb;
	4192	+ struct squashfs_super_block *squashfsb;
	4193	int nblocks = -1;
	4194	unsigned char *buf;
	4195
	4196	@@ -64,6 +67,7 @@
	4197	ext2sb = (struct ext2_super_block *) buf;
	4198	romfsb = (struct romfs_super_block *) buf;
	4199	cramfsb = (struct cramfs_super *) buf;
	4200	+ squashfsb = (struct squashfs_super_block *) buf;
	4201	memset(buf, 0xe5, size);
	4202
	4203	/*
	4204	@@ -101,6 +105,18 @@
	4205	goto done;
	4206	}
	4207
	4208	+ /* squashfs is at block zero too */
	4209	+ if (squashfsb->s_magic == SQUASHFS_MAGIC) {
	4210	+ printk(KERN_NOTICE
	4211	+ "RAMDISK: squashfs filesystem found at block %d\n",
	4212	+ start_block);
	4213	+ if (squashfsb->s_major < 3)
	4214	+ nblocks = (squashfsb->bytes_used_2+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
	4215	+ else
	4216	+ nblocks = (squashfsb->bytes_used+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
	4217	+ goto done;
	4218	+ }
	4219	+
	4220	/*
	4221	* Read block 1 to test for minix and ext2 superblock
	4222	*/

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