diff options
Diffstat (limited to 'target/linux/generic/patches-2.6.25/001-squashfs.patch')
| -rw-r--r-- | target/linux/generic/patches-2.6.25/001-squashfs.patch | 4170 |
1 files changed, 0 insertions, 4170 deletions
diff --git a/target/linux/generic/patches-2.6.25/001-squashfs.patch b/target/linux/generic/patches-2.6.25/001-squashfs.patch deleted file mode 100644 index b2be83183a..0000000000 --- a/target/linux/generic/patches-2.6.25/001-squashfs.patch +++ /dev/null @@ -1,4170 +0,0 @@ ---- a/fs/Kconfig -+++ b/fs/Kconfig -@@ -1367,6 +1367,71 @@ config CRAMFS - - If unsure, say N. - -+config SQUASHFS -+ tristate "SquashFS 3.0 - Squashed file system support" -+ select ZLIB_INFLATE -+ help -+ Saying Y here includes support for SquashFS 3.0 (a Compressed Read-Only File -+ System). Squashfs is a highly compressed read-only filesystem for Linux. -+ It uses zlib compression to compress both files, inodes and directories. -+ Inodes in the system are very small and all blocks are packed to minimise -+ data overhead. Block sizes greater than 4K are supported up to a maximum of 64K. -+ SquashFS 3.0 supports 64 bit filesystems and files (larger than 4GB), full -+ uid/gid information, hard links and timestamps. -+ -+ Squashfs is intended for general read-only filesystem use, for archival -+ use (i.e. in cases where a .tar.gz file may be used), and in embedded -+ systems where low overhead is needed. Further information and filesystem tools -+ are available from http://squashfs.sourceforge.net. -+ -+ If you want to compile this as a module ( = code which can be -+ inserted in and removed from the running kernel whenever you want), -+ say M here and read <file:Documentation/modules.txt>. The module -+ will be called squashfs. Note that the root file system (the one -+ containing the directory /) cannot be compiled as a module. -+ -+ If unsure, say N. -+ -+config SQUASHFS_EMBEDDED -+ -+ bool "Additional options for memory-constrained systems" -+ depends on SQUASHFS -+ default n -+ help -+ Saying Y here allows you to specify cache sizes and how Squashfs -+ allocates memory. This is only intended for memory constrained -+ systems. -+ -+ If unsure, say N. -+ -+config SQUASHFS_FRAGMENT_CACHE_SIZE -+ int "Number of fragments cached" if SQUASHFS_EMBEDDED -+ depends on SQUASHFS -+ default "3" -+ help -+ By default SquashFS caches the last 3 fragments read from -+ the filesystem. Increasing this amount may mean SquashFS -+ has to re-read fragments less often from disk, at the expense -+ of extra system memory. Decreasing this amount will mean -+ SquashFS uses less memory at the expense of extra reads from disk. -+ -+ Note there must be at least one cached fragment. Anything -+ much more than three will probably not make much difference. -+ -+config SQUASHFS_VMALLOC -+ bool "Use Vmalloc rather than Kmalloc" if SQUASHFS_EMBEDDED -+ depends on SQUASHFS -+ default n -+ help -+ By default SquashFS uses kmalloc to obtain fragment cache memory. -+ Kmalloc memory is the standard kernel allocator, but it can fail -+ on memory constrained systems. Because of the way Vmalloc works, -+ Vmalloc can succeed when kmalloc fails. Specifying this option -+ will make SquashFS always use Vmalloc to allocate the -+ fragment cache memory. -+ -+ If unsure, say N. -+ - config VXFS_FS - tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)" - depends on BLOCK ---- a/fs/Makefile -+++ b/fs/Makefile -@@ -73,6 +73,7 @@ obj-$(CONFIG_JBD) += jbd/ - obj-$(CONFIG_JBD2) += jbd2/ - obj-$(CONFIG_EXT2_FS) += ext2/ - obj-$(CONFIG_CRAMFS) += cramfs/ -+obj-$(CONFIG_SQUASHFS) += squashfs/ - obj-y += ramfs/ - obj-$(CONFIG_HUGETLBFS) += hugetlbfs/ - obj-$(CONFIG_CODA_FS) += coda/ ---- /dev/null -+++ b/fs/squashfs/inode.c -@@ -0,0 +1,2122 @@ -+/* -+ * Squashfs - a compressed read only filesystem for Linux -+ * -+ * Copyright (c) 2002, 2003, 2004, 2005, 2006 -+ * Phillip Lougher <phillip@lougher.org.uk> -+ * -+ * This program is free software; you can redistribute it and/or -+ * modify it under the terms of the GNU General Public License -+ * as published by the Free Software Foundation; either version 2, -+ * or (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -+ * -+ * inode.c -+ */ -+ -+#include <linux/types.h> -+#include <linux/squashfs_fs.h> -+#include <linux/module.h> -+#include <linux/errno.h> -+#include <linux/slab.h> -+#include <linux/fs.h> -+#include <linux/smp_lock.h> -+#include <linux/slab.h> -+#include <linux/squashfs_fs_sb.h> -+#include <linux/squashfs_fs_i.h> -+#include <linux/buffer_head.h> -+#include <linux/vfs.h> -+#include <linux/init.h> -+#include <linux/dcache.h> -+#include <linux/wait.h> -+#include <linux/zlib.h> -+#include <linux/blkdev.h> -+#include <linux/vmalloc.h> -+#include <asm/uaccess.h> -+#include <asm/semaphore.h> -+ -+#include "squashfs.h" -+ -+static void squashfs_put_super(struct super_block *); -+static int squashfs_statfs(struct dentry *, struct kstatfs *); -+static int squashfs_symlink_readpage(struct file *file, struct page *page); -+static int squashfs_readpage(struct file *file, struct page *page); -+static int squashfs_readpage4K(struct file *file, struct page *page); -+static int squashfs_readdir(struct file *, void *, filldir_t); -+static struct inode *squashfs_alloc_inode(struct super_block *sb); -+static void squashfs_destroy_inode(struct inode *inode); -+static int init_inodecache(void); -+static void destroy_inodecache(void); -+static struct dentry *squashfs_lookup(struct inode *, struct dentry *, -+ struct nameidata *); -+static struct inode *squashfs_iget(struct super_block *s, squashfs_inode_t inode); -+static long long read_blocklist(struct inode *inode, int index, -+ int readahead_blks, char *block_list, -+ unsigned short **block_p, unsigned int *bsize); -+static int squashfs_get_sb(struct file_system_type *, int, -+ const char *, void *, struct vfsmount *); -+ -+ -+static z_stream stream; -+ -+static struct file_system_type squashfs_fs_type = { -+ .owner = THIS_MODULE, -+ .name = "squashfs", -+ .get_sb = squashfs_get_sb, -+ .kill_sb = kill_block_super, -+ .fs_flags = FS_REQUIRES_DEV -+}; -+ -+static unsigned char squashfs_filetype_table[] = { -+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK -+}; -+ -+static struct super_operations squashfs_ops = { -+ .alloc_inode = squashfs_alloc_inode, -+ .destroy_inode = squashfs_destroy_inode, -+ .statfs = squashfs_statfs, -+ .put_super = squashfs_put_super, -+}; -+ -+SQSH_EXTERN struct address_space_operations squashfs_symlink_aops = { -+ .readpage = squashfs_symlink_readpage -+}; -+ -+SQSH_EXTERN struct address_space_operations squashfs_aops = { -+ .readpage = squashfs_readpage -+}; -+ -+SQSH_EXTERN struct address_space_operations squashfs_aops_4K = { -+ .readpage = squashfs_readpage4K -+}; -+ -+static struct file_operations squashfs_dir_ops = { -+ .read = generic_read_dir, -+ .readdir = squashfs_readdir -+}; -+ -+SQSH_EXTERN struct inode_operations squashfs_dir_inode_ops = { -+ .lookup = squashfs_lookup -+}; -+ -+ -+static struct buffer_head *get_block_length(struct super_block *s, -+ int *cur_index, int *offset, int *c_byte) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ unsigned short temp; -+ struct buffer_head *bh; -+ -+ if (!(bh = sb_bread(s, *cur_index))) -+ goto out; -+ -+ if (msblk->devblksize - *offset == 1) { -+ if (msblk->swap) -+ ((unsigned char *) &temp)[1] = *((unsigned char *) -+ (bh->b_data + *offset)); -+ else -+ ((unsigned char *) &temp)[0] = *((unsigned char *) -+ (bh->b_data + *offset)); -+ brelse(bh); -+ if (!(bh = sb_bread(s, ++(*cur_index)))) -+ goto out; -+ if (msblk->swap) -+ ((unsigned char *) &temp)[0] = *((unsigned char *) -+ bh->b_data); -+ else -+ ((unsigned char *) &temp)[1] = *((unsigned char *) -+ bh->b_data); -+ *c_byte = temp; -+ *offset = 1; -+ } else { -+ if (msblk->swap) { -+ ((unsigned char *) &temp)[1] = *((unsigned char *) -+ (bh->b_data + *offset)); -+ ((unsigned char *) &temp)[0] = *((unsigned char *) -+ (bh->b_data + *offset + 1)); -+ } else { -+ ((unsigned char *) &temp)[0] = *((unsigned char *) -+ (bh->b_data + *offset)); -+ ((unsigned char *) &temp)[1] = *((unsigned char *) -+ (bh->b_data + *offset + 1)); -+ } -+ *c_byte = temp; -+ *offset += 2; -+ } -+ -+ if (SQUASHFS_CHECK_DATA(msblk->sblk.flags)) { -+ if (*offset == msblk->devblksize) { -+ brelse(bh); -+ if (!(bh = sb_bread(s, ++(*cur_index)))) -+ goto out; -+ *offset = 0; -+ } -+ if (*((unsigned char *) (bh->b_data + *offset)) != -+ SQUASHFS_MARKER_BYTE) { -+ ERROR("Metadata block marker corrupt @ %x\n", -+ *cur_index); -+ brelse(bh); -+ goto out; -+ } -+ (*offset)++; -+ } -+ return bh; -+ -+out: -+ return NULL; -+} -+ -+ -+SQSH_EXTERN unsigned int squashfs_read_data(struct super_block *s, char *buffer, -+ long long index, unsigned int length, -+ long long *next_index) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct buffer_head *bh[((SQUASHFS_FILE_MAX_SIZE - 1) >> -+ msblk->devblksize_log2) + 2]; -+ unsigned int offset = index & ((1 << msblk->devblksize_log2) - 1); -+ unsigned int cur_index = index >> msblk->devblksize_log2; -+ int bytes, avail_bytes, b = 0, k; -+ char *c_buffer; -+ unsigned int compressed; -+ unsigned int c_byte = length; -+ -+ if (c_byte) { -+ bytes = msblk->devblksize - offset; -+ compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte); -+ c_buffer = compressed ? msblk->read_data : buffer; -+ c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte); -+ -+ TRACE("Block @ 0x%llx, %scompressed size %d\n", index, compressed -+ ? "" : "un", (unsigned int) c_byte); -+ -+ if (!(bh[0] = sb_getblk(s, cur_index))) -+ goto block_release; -+ -+ for (b = 1; bytes < c_byte; b++) { -+ if (!(bh[b] = sb_getblk(s, ++cur_index))) -+ goto block_release; -+ bytes += msblk->devblksize; -+ } -+ ll_rw_block(READ, b, bh); -+ } else { -+ if (!(bh[0] = get_block_length(s, &cur_index, &offset, -+ &c_byte))) -+ goto read_failure; -+ -+ bytes = msblk->devblksize - offset; -+ compressed = SQUASHFS_COMPRESSED(c_byte); -+ c_buffer = compressed ? msblk->read_data : buffer; -+ c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte); -+ -+ TRACE("Block @ 0x%llx, %scompressed size %d\n", index, compressed -+ ? "" : "un", (unsigned int) c_byte); -+ -+ for (b = 1; bytes < c_byte; b++) { -+ if (!(bh[b] = sb_getblk(s, ++cur_index))) -+ goto block_release; -+ bytes += msblk->devblksize; -+ } -+ ll_rw_block(READ, b - 1, bh + 1); -+ } -+ -+ if (compressed) -+ down(&msblk->read_data_mutex); -+ -+ for (bytes = 0, k = 0; k < b; k++) { -+ avail_bytes = (c_byte - bytes) > (msblk->devblksize - offset) ? -+ msblk->devblksize - offset : -+ c_byte - bytes; -+ wait_on_buffer(bh[k]); -+ if (!buffer_uptodate(bh[k])) -+ goto block_release; -+ memcpy(c_buffer + bytes, bh[k]->b_data + offset, avail_bytes); -+ bytes += avail_bytes; -+ offset = 0; -+ brelse(bh[k]); -+ } -+ -+ /* -+ * uncompress block -+ */ -+ if (compressed) { -+ int zlib_err; -+ -+ stream.next_in = c_buffer; -+ stream.avail_in = c_byte; -+ stream.next_out = buffer; -+ stream.avail_out = msblk->read_size; -+ -+ if (((zlib_err = zlib_inflateInit(&stream)) != Z_OK) || -+ ((zlib_err = zlib_inflate(&stream, Z_FINISH)) -+ != Z_STREAM_END) || ((zlib_err = -+ zlib_inflateEnd(&stream)) != Z_OK)) { -+ ERROR("zlib_fs returned unexpected result 0x%x\n", -+ zlib_err); -+ bytes = 0; -+ } else -+ bytes = stream.total_out; -+ -+ up(&msblk->read_data_mutex); -+ } -+ -+ if (next_index) -+ *next_index = index + c_byte + (length ? 0 : -+ (SQUASHFS_CHECK_DATA(msblk->sblk.flags) -+ ? 3 : 2)); -+ return bytes; -+ -+block_release: -+ while (--b >= 0) -+ brelse(bh[b]); -+ -+read_failure: -+ ERROR("sb_bread failed reading block 0x%x\n", cur_index); -+ return 0; -+} -+ -+ -+SQSH_EXTERN int squashfs_get_cached_block(struct super_block *s, char *buffer, -+ long long block, unsigned int offset, -+ int length, long long *next_block, -+ unsigned int *next_offset) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ int n, i, bytes, return_length = length; -+ long long next_index; -+ -+ TRACE("Entered squashfs_get_cached_block [%llx:%x]\n", block, offset); -+ -+ while ( 1 ) { -+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++) -+ if (msblk->block_cache[i].block == block) -+ break; -+ -+ down(&msblk->block_cache_mutex); -+ -+ if (i == SQUASHFS_CACHED_BLKS) { -+ /* read inode header block */ -+ for (i = msblk->next_cache, n = SQUASHFS_CACHED_BLKS; -+ n ; n --, i = (i + 1) % -+ SQUASHFS_CACHED_BLKS) -+ if (msblk->block_cache[i].block != -+ SQUASHFS_USED_BLK) -+ break; -+ -+ if (n == 0) { -+ wait_queue_t wait; -+ -+ init_waitqueue_entry(&wait, current); -+ add_wait_queue(&msblk->waitq, &wait); -+ set_current_state(TASK_UNINTERRUPTIBLE); -+ up(&msblk->block_cache_mutex); -+ schedule(); -+ set_current_state(TASK_RUNNING); -+ remove_wait_queue(&msblk->waitq, &wait); -+ continue; -+ } -+ msblk->next_cache = (i + 1) % SQUASHFS_CACHED_BLKS; -+ -+ if (msblk->block_cache[i].block == -+ SQUASHFS_INVALID_BLK) { -+ if (!(msblk->block_cache[i].data = -+ kmalloc(SQUASHFS_METADATA_SIZE, -+ GFP_KERNEL))) { -+ ERROR("Failed to allocate cache" -+ "block\n"); -+ up(&msblk->block_cache_mutex); -+ goto out; -+ } -+ } -+ -+ msblk->block_cache[i].block = SQUASHFS_USED_BLK; -+ up(&msblk->block_cache_mutex); -+ -+ if (!(msblk->block_cache[i].length = -+ squashfs_read_data(s, -+ msblk->block_cache[i].data, -+ block, 0, &next_index))) { -+ ERROR("Unable to read cache block [%llx:%x]\n", -+ block, offset); -+ goto out; -+ } -+ -+ down(&msblk->block_cache_mutex); -+ wake_up(&msblk->waitq); -+ msblk->block_cache[i].block = block; -+ msblk->block_cache[i].next_index = next_index; -+ TRACE("Read cache block [%llx:%x]\n", block, offset); -+ } -+ -+ if (msblk->block_cache[i].block != block) { -+ up(&msblk->block_cache_mutex); -+ continue; -+ } -+ -+ if ((bytes = msblk->block_cache[i].length - offset) >= length) { -+ if (buffer) -+ memcpy(buffer, msblk->block_cache[i].data + -+ offset, length); -+ if (msblk->block_cache[i].length - offset == length) { -+ *next_block = msblk->block_cache[i].next_index; -+ *next_offset = 0; -+ } else { -+ *next_block = block; -+ *next_offset = offset + length; -+ } -+ up(&msblk->block_cache_mutex); -+ goto finish; -+ } else { -+ if (buffer) { -+ memcpy(buffer, msblk->block_cache[i].data + -+ offset, bytes); -+ buffer += bytes; -+ } -+ block = msblk->block_cache[i].next_index; -+ up(&msblk->block_cache_mutex); -+ length -= bytes; -+ offset = 0; -+ } -+ } -+ -+finish: -+ return return_length; -+out: -+ return 0; -+} -+ -+ -+static int get_fragment_location(struct super_block *s, unsigned int fragment, -+ long long *fragment_start_block, -+ unsigned int *fragment_size) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ long long start_block = -+ msblk->fragment_index[SQUASHFS_FRAGMENT_INDEX(fragment)]; -+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET(fragment); -+ struct squashfs_fragment_entry fragment_entry; -+ -+ if (msblk->swap) { -+ struct squashfs_fragment_entry sfragment_entry; -+ -+ if (!squashfs_get_cached_block(s, (char *) &sfragment_entry, -+ start_block, offset, -+ sizeof(sfragment_entry), &start_block, -+ &offset)) -+ goto out; -+ SQUASHFS_SWAP_FRAGMENT_ENTRY(&fragment_entry, &sfragment_entry); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) &fragment_entry, -+ start_block, offset, -+ sizeof(fragment_entry), &start_block, -+ &offset)) -+ goto out; -+ -+ *fragment_start_block = fragment_entry.start_block; -+ *fragment_size = fragment_entry.size; -+ -+ return 1; -+ -+out: -+ return 0; -+} -+ -+ -+SQSH_EXTERN void release_cached_fragment(struct squashfs_sb_info *msblk, struct -+ squashfs_fragment_cache *fragment) -+{ -+ down(&msblk->fragment_mutex); -+ fragment->locked --; -+ wake_up(&msblk->fragment_wait_queue); -+ up(&msblk->fragment_mutex); -+} -+ -+ -+SQSH_EXTERN struct squashfs_fragment_cache *get_cached_fragment(struct super_block -+ *s, long long start_block, -+ int length) -+{ -+ int i, n; -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ -+ while ( 1 ) { -+ down(&msblk->fragment_mutex); -+ -+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS && -+ msblk->fragment[i].block != start_block; i++); -+ -+ if (i == SQUASHFS_CACHED_FRAGMENTS) { -+ for (i = msblk->next_fragment, n = -+ SQUASHFS_CACHED_FRAGMENTS; n && -+ msblk->fragment[i].locked; n--, i = (i + 1) % -+ SQUASHFS_CACHED_FRAGMENTS); -+ -+ if (n == 0) { -+ wait_queue_t wait; -+ -+ init_waitqueue_entry(&wait, current); -+ add_wait_queue(&msblk->fragment_wait_queue, -+ &wait); -+ set_current_state(TASK_UNINTERRUPTIBLE); -+ up(&msblk->fragment_mutex); -+ schedule(); -+ set_current_state(TASK_RUNNING); -+ remove_wait_queue(&msblk->fragment_wait_queue, -+ &wait); -+ continue; -+ } -+ msblk->next_fragment = (msblk->next_fragment + 1) % -+ SQUASHFS_CACHED_FRAGMENTS; -+ -+ if (msblk->fragment[i].data == NULL) -+ if (!(msblk->fragment[i].data = SQUASHFS_ALLOC -+ (SQUASHFS_FILE_MAX_SIZE))) { -+ ERROR("Failed to allocate fragment " -+ "cache block\n"); -+ up(&msblk->fragment_mutex); -+ goto out; -+ } -+ -+ msblk->fragment[i].block = SQUASHFS_INVALID_BLK; -+ msblk->fragment[i].locked = 1; -+ up(&msblk->fragment_mutex); -+ -+ if (!(msblk->fragment[i].length = squashfs_read_data(s, -+ msblk->fragment[i].data, -+ start_block, length, NULL))) { -+ ERROR("Unable to read fragment cache block " -+ "[%llx]\n", start_block); -+ msblk->fragment[i].locked = 0; -+ goto out; -+ } -+ -+ msblk->fragment[i].block = start_block; -+ TRACE("New fragment %d, start block %lld, locked %d\n", -+ i, msblk->fragment[i].block, -+ msblk->fragment[i].locked); -+ break; -+ } -+ -+ msblk->fragment[i].locked++; -+ up(&msblk->fragment_mutex); -+ TRACE("Got fragment %d, start block %lld, locked %d\n", i, -+ msblk->fragment[i].block, -+ msblk->fragment[i].locked); -+ break; -+ } -+ -+ return &msblk->fragment[i]; -+ -+out: -+ return NULL; -+} -+ -+ -+static struct inode *squashfs_new_inode(struct super_block *s, -+ struct squashfs_base_inode_header *inodeb) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct inode *i = new_inode(s); -+ -+ if (i) { -+ i->i_ino = inodeb->inode_number; -+ i->i_mtime.tv_sec = inodeb->mtime; -+ i->i_atime.tv_sec = inodeb->mtime; -+ i->i_ctime.tv_sec = inodeb->mtime; -+ i->i_uid = msblk->uid[inodeb->uid]; -+ i->i_mode = inodeb->mode; -+ i->i_size = 0; -+ if (inodeb->guid == SQUASHFS_GUIDS) -+ i->i_gid = i->i_uid; -+ else -+ i->i_gid = msblk->guid[inodeb->guid]; -+ } -+ -+ return i; -+} -+ -+ -+static struct inode *squashfs_iget(struct super_block *s, squashfs_inode_t inode) -+{ -+ struct inode *i; -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ long long block = SQUASHFS_INODE_BLK(inode) + -+ sblk->inode_table_start; -+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode); -+ long long next_block; -+ unsigned int next_offset; -+ union squashfs_inode_header id, sid; -+ struct squashfs_base_inode_header *inodeb = &id.base, -+ *sinodeb = &sid.base; -+ -+ TRACE("Entered squashfs_iget\n"); -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) sinodeb, block, -+ offset, sizeof(*sinodeb), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_BASE_INODE_HEADER(inodeb, sinodeb, -+ sizeof(*sinodeb)); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) inodeb, block, -+ offset, sizeof(*inodeb), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ switch(inodeb->inode_type) { -+ case SQUASHFS_FILE_TYPE: { -+ unsigned int frag_size; -+ long long frag_blk; -+ struct squashfs_reg_inode_header *inodep = &id.reg; -+ struct squashfs_reg_inode_header *sinodep = &sid.reg; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_REG_INODE_HEADER(inodep, sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ frag_blk = SQUASHFS_INVALID_BLK; -+ if (inodep->fragment != SQUASHFS_INVALID_FRAG && -+ !get_fragment_location(s, -+ inodep->fragment, &frag_blk, &frag_size)) -+ goto failed_read; -+ -+ if((i = squashfs_new_inode(s, inodeb)) == NULL) -+ goto failed_read1; -+ -+ i->i_nlink = 1; -+ i->i_size = inodep->file_size; -+ i->i_fop = &generic_ro_fops; -+ i->i_mode |= S_IFREG; -+ i->i_blocks = ((i->i_size - 1) >> 9) + 1; -+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk; -+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size; -+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset; -+ SQUASHFS_I(i)->start_block = inodep->start_block; -+ SQUASHFS_I(i)->u.s1.block_list_start = next_block; -+ SQUASHFS_I(i)->offset = next_offset; -+ if (sblk->block_size > 4096) -+ i->i_data.a_ops = &squashfs_aops; -+ else -+ i->i_data.a_ops = &squashfs_aops_4K; -+ -+ TRACE("File inode %x:%x, start_block %llx, " -+ "block_list_start %llx, offset %x\n", -+ SQUASHFS_INODE_BLK(inode), offset, -+ inodep->start_block, next_block, -+ next_offset); -+ break; -+ } -+ case SQUASHFS_LREG_TYPE: { -+ unsigned int frag_size; -+ long long frag_blk; -+ struct squashfs_lreg_inode_header *inodep = &id.lreg; -+ struct squashfs_lreg_inode_header *sinodep = &sid.lreg; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_LREG_INODE_HEADER(inodep, sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ frag_blk = SQUASHFS_INVALID_BLK; -+ if (inodep->fragment != SQUASHFS_INVALID_FRAG && -+ !get_fragment_location(s, -+ inodep->fragment, &frag_blk, &frag_size)) -+ goto failed_read; -+ -+ if((i = squashfs_new_inode(s, inodeb)) == NULL) -+ goto failed_read1; -+ -+ i->i_nlink = inodep->nlink; -+ i->i_size = inodep->file_size; -+ i->i_fop = &generic_ro_fops; -+ i->i_mode |= S_IFREG; -+ i->i_blocks = ((i->i_size - 1) >> 9) + 1; -+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk; -+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size; -+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset; -+ SQUASHFS_I(i)->start_block = inodep->start_block; -+ SQUASHFS_I(i)->u.s1.block_list_start = next_block; -+ SQUASHFS_I(i)->offset = next_offset; -+ if (sblk->block_size > 4096) -+ i->i_data.a_ops = &squashfs_aops; -+ else -+ i->i_data.a_ops = &squashfs_aops_4K; -+ -+ TRACE("File inode %x:%x, start_block %llx, " -+ "block_list_start %llx, offset %x\n", -+ SQUASHFS_INODE_BLK(inode), offset, -+ inodep->start_block, next_block, -+ next_offset); -+ break; -+ } -+ case SQUASHFS_DIR_TYPE: { -+ struct squashfs_dir_inode_header *inodep = &id.dir; -+ struct squashfs_dir_inode_header *sinodep = &sid.dir; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_DIR_INODE_HEADER(inodep, sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ if((i = squashfs_new_inode(s, inodeb)) == NULL) -+ goto failed_read1; -+ -+ i->i_nlink = inodep->nlink; -+ i->i_size = inodep->file_size; -+ i->i_op = &squashfs_dir_inode_ops; -+ i->i_fop = &squashfs_dir_ops; -+ i->i_mode |= S_IFDIR; -+ SQUASHFS_I(i)->start_block = inodep->start_block; -+ SQUASHFS_I(i)->offset = inodep->offset; -+ SQUASHFS_I(i)->u.s2.directory_index_count = 0; -+ SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode; -+ -+ TRACE("Directory inode %x:%x, start_block %x, offset " -+ "%x\n", SQUASHFS_INODE_BLK(inode), -+ offset, inodep->start_block, -+ inodep->offset); -+ break; -+ } -+ case SQUASHFS_LDIR_TYPE: { -+ struct squashfs_ldir_inode_header *inodep = &id.ldir; -+ struct squashfs_ldir_inode_header *sinodep = &sid.ldir; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_LDIR_INODE_HEADER(inodep, -+ sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ if((i = squashfs_new_inode(s, inodeb)) == NULL) -+ goto failed_read1; -+ -+ i->i_nlink = inodep->nlink; -+ i->i_size = inodep->file_size; -+ i->i_op = &squashfs_dir_inode_ops; -+ i->i_fop = &squashfs_dir_ops; -+ i->i_mode |= S_IFDIR; -+ SQUASHFS_I(i)->start_block = inodep->start_block; -+ SQUASHFS_I(i)->offset = inodep->offset; -+ SQUASHFS_I(i)->u.s2.directory_index_start = next_block; -+ SQUASHFS_I(i)->u.s2.directory_index_offset = -+ next_offset; -+ SQUASHFS_I(i)->u.s2.directory_index_count = -+ inodep->i_count; -+ SQUASHFS_I(i)->u.s2.parent_inode = inodep->parent_inode; -+ -+ TRACE("Long directory inode %x:%x, start_block %x, " -+ "offset %x\n", -+ SQUASHFS_INODE_BLK(inode), offset, -+ inodep->start_block, inodep->offset); -+ break; -+ } -+ case SQUASHFS_SYMLINK_TYPE: { -+ struct squashfs_symlink_inode_header *inodep = -+ &id.symlink; -+ struct squashfs_symlink_inode_header *sinodep = -+ &sid.symlink; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER(inodep, -+ sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ if((i = squashfs_new_inode(s, inodeb)) == NULL) -+ goto failed_read1; -+ -+ i->i_nlink = inodep->nlink; -+ i->i_size = inodep->symlink_size; -+ i->i_op = &page_symlink_inode_operations; -+ i->i_data.a_ops = &squashfs_symlink_aops; -+ i->i_mode |= S_IFLNK; -+ SQUASHFS_I(i)->start_block = next_block; -+ SQUASHFS_I(i)->offset = next_offset; -+ -+ TRACE("Symbolic link inode %x:%x, start_block %llx, " -+ "offset %x\n", -+ SQUASHFS_INODE_BLK(inode), offset, -+ next_block, next_offset); -+ break; -+ } -+ case SQUASHFS_BLKDEV_TYPE: -+ case SQUASHFS_CHRDEV_TYPE: { -+ struct squashfs_dev_inode_header *inodep = &id.dev; -+ struct squashfs_dev_inode_header *sinodep = &sid.dev; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_DEV_INODE_HEADER(inodep, sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ if ((i = squashfs_new_inode(s, inodeb)) == NULL) -+ goto failed_read1; -+ -+ i->i_nlink = inodep->nlink; -+ i->i_mode |= (inodeb->inode_type == -+ SQUASHFS_CHRDEV_TYPE) ? S_IFCHR : -+ S_IFBLK; -+ init_special_inode(i, i->i_mode, -+ old_decode_dev(inodep->rdev)); -+ -+ TRACE("Device inode %x:%x, rdev %x\n", -+ SQUASHFS_INODE_BLK(inode), offset, -+ inodep->rdev); -+ break; -+ } -+ case SQUASHFS_FIFO_TYPE: -+ case SQUASHFS_SOCKET_TYPE: { -+ struct squashfs_ipc_inode_header *inodep = &id.ipc; -+ struct squashfs_ipc_inode_header *sinodep = &sid.ipc; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_IPC_INODE_HEADER(inodep, sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ if ((i = squashfs_new_inode(s, inodeb)) == NULL) -+ goto failed_read1; -+ -+ i->i_nlink = inodep->nlink; -+ i->i_mode |= (inodeb->inode_type == SQUASHFS_FIFO_TYPE) -+ ? S_IFIFO : S_IFSOCK; -+ init_special_inode(i, i->i_mode, 0); -+ break; -+ } -+ default: -+ ERROR("Unknown inode type %d in squashfs_iget!\n", -+ inodeb->inode_type); -+ goto failed_read1; -+ } -+ -+ insert_inode_hash(i); -+ return i; -+ -+failed_read: -+ ERROR("Unable to read inode [%llx:%x]\n", block, offset); -+ -+failed_read1: -+ return NULL; -+} -+ -+ -+static int read_fragment_index_table(struct super_block *s) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ -+ /* Allocate fragment index table */ -+ if (!(msblk->fragment_index = kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES -+ (sblk->fragments), GFP_KERNEL))) { -+ ERROR("Failed to allocate uid/gid table\n"); -+ return 0; -+ } -+ -+ if (SQUASHFS_FRAGMENT_INDEX_BYTES(sblk->fragments) && -+ !squashfs_read_data(s, (char *) -+ msblk->fragment_index, -+ sblk->fragment_table_start, -+ SQUASHFS_FRAGMENT_INDEX_BYTES -+ (sblk->fragments) | -+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL)) { -+ ERROR("unable to read fragment index table\n"); -+ return 0; -+ } -+ -+ if (msblk->swap) { -+ int i; -+ long long fragment; -+ -+ for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES(sblk->fragments); -+ i++) { -+ SQUASHFS_SWAP_FRAGMENT_INDEXES((&fragment), -+ &msblk->fragment_index[i], 1); -+ msblk->fragment_index[i] = fragment; -+ } -+ } -+ -+ return 1; -+} -+ -+ -+static int supported_squashfs_filesystem(struct squashfs_sb_info *msblk, int silent) -+{ -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ -+ msblk->iget = squashfs_iget; -+ msblk->read_blocklist = read_blocklist; -+ msblk->read_fragment_index_table = read_fragment_index_table; -+ -+ if (sblk->s_major == 1) { -+ if (!squashfs_1_0_supported(msblk)) { -+ SERROR("Major/Minor mismatch, Squashfs 1.0 filesystems " -+ "are unsupported\n"); -+ SERROR("Please recompile with " -+ "Squashfs 1.0 support enabled\n"); -+ return 0; -+ } -+ } else if (sblk->s_major == 2) { -+ if (!squashfs_2_0_supported(msblk)) { -+ SERROR("Major/Minor mismatch, Squashfs 2.0 filesystems " -+ "are unsupported\n"); -+ SERROR("Please recompile with " -+ "Squashfs 2.0 support enabled\n"); -+ return 0; -+ } -+ } else if(sblk->s_major != SQUASHFS_MAJOR || sblk->s_minor > -+ SQUASHFS_MINOR) { -+ SERROR("Major/Minor mismatch, trying to mount newer %d.%d " -+ "filesystem\n", sblk->s_major, sblk->s_minor); -+ SERROR("Please update your kernel\n"); -+ return 0; -+ } -+ -+ return 1; -+} -+ -+ -+static int squashfs_fill_super(struct super_block *s, void *data, int silent) -+{ -+ struct squashfs_sb_info *msblk; -+ struct squashfs_super_block *sblk; -+ int i; -+ char b[BDEVNAME_SIZE]; -+ struct inode *root; -+ -+ TRACE("Entered squashfs_read_superblock\n"); -+ -+ if (!(s->s_fs_info = kmalloc(sizeof(struct squashfs_sb_info), -+ GFP_KERNEL))) { -+ ERROR("Failed to allocate superblock\n"); -+ goto failure; -+ } -+ memset(s->s_fs_info, 0, sizeof(struct squashfs_sb_info)); -+ msblk = s->s_fs_info; -+ sblk = &msblk->sblk; -+ -+ msblk->devblksize = sb_min_blocksize(s, BLOCK_SIZE); -+ msblk->devblksize_log2 = ffz(~msblk->devblksize); -+ -+ init_MUTEX(&msblk->read_data_mutex); -+ init_MUTEX(&msblk->read_page_mutex); -+ init_MUTEX(&msblk->block_cache_mutex); -+ init_MUTEX(&msblk->fragment_mutex); -+ init_MUTEX(&msblk->meta_index_mutex); -+ -+ init_waitqueue_head(&msblk->waitq); -+ init_waitqueue_head(&msblk->fragment_wait_queue); -+ -+ if (!squashfs_read_data(s, (char *) sblk, SQUASHFS_START, -+ sizeof(struct squashfs_super_block) | -+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL)) { -+ SERROR("unable to read superblock\n"); -+ goto failed_mount; -+ } -+ -+ /* Check it is a SQUASHFS superblock */ -+ msblk->swap = 0; -+ if ((s->s_magic = sblk->s_magic) != SQUASHFS_MAGIC) { -+ if (sblk->s_magic == SQUASHFS_MAGIC_SWAP) { -+ struct squashfs_super_block ssblk; -+ -+ WARNING("Mounting a different endian SQUASHFS " -+ "filesystem on %s\n", bdevname(s->s_bdev, b)); -+ -+ SQUASHFS_SWAP_SUPER_BLOCK(&ssblk, sblk); -+ memcpy(sblk, &ssblk, sizeof(struct squashfs_super_block)); -+ msblk->swap = 1; -+ } else { -+ SERROR("Can't find a SQUASHFS superblock on %s\n", -+ bdevname(s->s_bdev, b)); -+ goto failed_mount; -+ } -+ } -+ -+ /* Check the MAJOR & MINOR versions */ -+ if(!supported_squashfs_filesystem(msblk, silent)) -+ goto failed_mount; -+ -+ TRACE("Found valid superblock on %s\n", bdevname(s->s_bdev, b)); -+ TRACE("Inodes are %scompressed\n", -+ SQUASHFS_UNCOMPRESSED_INODES -+ (sblk->flags) ? "un" : ""); -+ TRACE("Data is %scompressed\n", -+ SQUASHFS_UNCOMPRESSED_DATA(sblk->flags) -+ ? "un" : ""); -+ TRACE("Check data is %s present in the filesystem\n", -+ SQUASHFS_CHECK_DATA(sblk->flags) ? -+ "" : "not"); -+ TRACE("Filesystem size %lld bytes\n", sblk->bytes_used); -+ TRACE("Block size %d\n", sblk->block_size); -+ TRACE("Number of inodes %d\n", sblk->inodes); -+ if (sblk->s_major > 1) -+ TRACE("Number of fragments %d\n", sblk->fragments); -+ TRACE("Number of uids %d\n", sblk->no_uids); -+ TRACE("Number of gids %d\n", sblk->no_guids); -+ TRACE("sblk->inode_table_start %llx\n", sblk->inode_table_start); -+ TRACE("sblk->directory_table_start %llx\n", sblk->directory_table_start); -+ if (sblk->s_major > 1) -+ TRACE("sblk->fragment_table_start %llx\n", -+ sblk->fragment_table_start); -+ TRACE("sblk->uid_start %llx\n", sblk->uid_start); -+ -+ s->s_flags |= MS_RDONLY; -+ s->s_op = &squashfs_ops; -+ -+ /* Init inode_table block pointer array */ -+ if (!(msblk->block_cache = kmalloc(sizeof(struct squashfs_cache) * -+ SQUASHFS_CACHED_BLKS, GFP_KERNEL))) { -+ ERROR("Failed to allocate block cache\n"); -+ goto failed_mount; -+ } -+ -+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++) -+ msblk->block_cache[i].block = SQUASHFS_INVALID_BLK; -+ -+ msblk->next_cache = 0; -+ -+ /* Allocate read_data block */ -+ msblk->read_size = (sblk->block_size < SQUASHFS_METADATA_SIZE) ? -+ SQUASHFS_METADATA_SIZE : -+ sblk->block_size; -+ -+ if (!(msblk->read_data = kmalloc(msblk->read_size, GFP_KERNEL))) { -+ ERROR("Failed to allocate read_data block\n"); -+ goto failed_mount; -+ } -+ -+ /* Allocate read_page block */ -+ if (!(msblk->read_page = kmalloc(sblk->block_size, GFP_KERNEL))) { -+ ERROR("Failed to allocate read_page block\n"); -+ goto failed_mount; -+ } -+ -+ /* Allocate uid and gid tables */ -+ if (!(msblk->uid = kmalloc((sblk->no_uids + sblk->no_guids) * -+ sizeof(unsigned int), GFP_KERNEL))) { -+ ERROR("Failed to allocate uid/gid table\n"); -+ goto failed_mount; -+ } -+ msblk->guid = msblk->uid + sblk->no_uids; -+ -+ if (msblk->swap) { -+ unsigned int suid[sblk->no_uids + sblk->no_guids]; -+ -+ if (!squashfs_read_data(s, (char *) &suid, sblk->uid_start, -+ ((sblk->no_uids + sblk->no_guids) * -+ sizeof(unsigned int)) | -+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL)) { -+ ERROR("unable to read uid/gid table\n"); -+ goto failed_mount; -+ } -+ -+ SQUASHFS_SWAP_DATA(msblk->uid, suid, (sblk->no_uids + -+ sblk->no_guids), (sizeof(unsigned int) * 8)); -+ } else -+ if (!squashfs_read_data(s, (char *) msblk->uid, sblk->uid_start, -+ ((sblk->no_uids + sblk->no_guids) * -+ sizeof(unsigned int)) | -+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL)) { -+ ERROR("unable to read uid/gid table\n"); -+ goto failed_mount; -+ } -+ -+ -+ if (sblk->s_major == 1 && squashfs_1_0_supported(msblk)) -+ goto allocate_root; -+ -+ if (!(msblk->fragment = kmalloc(sizeof(struct squashfs_fragment_cache) * -+ SQUASHFS_CACHED_FRAGMENTS, GFP_KERNEL))) { -+ ERROR("Failed to allocate fragment block cache\n"); -+ goto failed_mount; -+ } -+ -+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++) { -+ msblk->fragment[i].locked = 0; -+ msblk->fragment[i].block = SQUASHFS_INVALID_BLK; -+ msblk->fragment[i].data = NULL; -+ } -+ -+ msblk->next_fragment = 0; -+ -+ /* Allocate fragment index table */ -+ if (msblk->read_fragment_index_table(s) == 0) -+ goto failed_mount; -+ -+allocate_root: -+ if ((root = (msblk->iget)(s, sblk->root_inode)) == NULL) -+ goto failed_mount; -+ -+ if ((s->s_root = d_alloc_root(root)) == NULL) { -+ ERROR("Root inode create failed\n"); -+ iput(root); -+ goto failed_mount; -+ } -+ -+ TRACE("Leaving squashfs_read_super\n"); -+ return 0; -+ -+failed_mount: -+ kfree(msblk->fragment_index); -+ kfree(msblk->fragment); -+ kfree(msblk->uid); -+ kfree(msblk->read_page); -+ kfree(msblk->read_data); -+ kfree(msblk->block_cache); -+ kfree(msblk->fragment_index_2); -+ kfree(s->s_fs_info); -+ s->s_fs_info = NULL; -+ return -EINVAL; -+ -+failure: -+ return -ENOMEM; -+} -+ -+ -+static int squashfs_statfs(struct dentry *dentry, struct kstatfs *buf) -+{ -+ struct squashfs_sb_info *msblk = dentry->d_inode->i_sb->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ -+ TRACE("Entered squashfs_statfs\n"); -+ -+ buf->f_type = SQUASHFS_MAGIC; -+ buf->f_bsize = sblk->block_size; -+ buf->f_blocks = ((sblk->bytes_used - 1) >> sblk->block_log) + 1; -+ buf->f_bfree = buf->f_bavail = 0; -+ buf->f_files = sblk->inodes; -+ buf->f_ffree = 0; -+ buf->f_namelen = SQUASHFS_NAME_LEN; -+ -+ return 0; -+} -+ -+ -+static int squashfs_symlink_readpage(struct file *file, struct page *page) -+{ -+ struct inode *inode = page->mapping->host; -+ int index = page->index << PAGE_CACHE_SHIFT, length, bytes; -+ long long block = SQUASHFS_I(inode)->start_block; -+ int offset = SQUASHFS_I(inode)->offset; -+ void *pageaddr = kmap(page); -+ -+ TRACE("Entered squashfs_symlink_readpage, page index %ld, start block " -+ "%llx, offset %x\n", page->index, -+ SQUASHFS_I(inode)->start_block, -+ SQUASHFS_I(inode)->offset); -+ -+ for (length = 0; length < index; length += bytes) { -+ if (!(bytes = squashfs_get_cached_block(inode->i_sb, NULL, -+ block, offset, PAGE_CACHE_SIZE, &block, -+ &offset))) { -+ ERROR("Unable to read symbolic link [%llx:%x]\n", block, -+ offset); -+ goto skip_read; -+ } -+ } -+ -+ if (length != index) { -+ ERROR("(squashfs_symlink_readpage) length != index\n"); -+ bytes = 0; -+ goto skip_read; -+ } -+ -+ bytes = (i_size_read(inode) - length) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : -+ i_size_read(inode) - length; -+ -+ if (!(bytes = squashfs_get_cached_block(inode->i_sb, pageaddr, block, -+ offset, bytes, &block, &offset))) -+ ERROR("Unable to read symbolic link [%llx:%x]\n", block, offset); -+ -+skip_read: -+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes); -+ kunmap(page); -+ SetPageUptodate(page); -+ unlock_page(page); -+ -+ return 0; -+} -+ -+ -+struct meta_index *locate_meta_index(struct inode *inode, int index, int offset) -+{ -+ struct meta_index *meta = NULL; -+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info; -+ int i; -+ -+ down(&msblk->meta_index_mutex); -+ -+ TRACE("locate_meta_index: index %d, offset %d\n", index, offset); -+ -+ if(msblk->meta_index == NULL) -+ goto not_allocated; -+ -+ for (i = 0; i < SQUASHFS_META_NUMBER; i ++) -+ if (msblk->meta_index[i].inode_number == inode->i_ino && -+ msblk->meta_index[i].offset >= offset && -+ msblk->meta_index[i].offset <= index && -+ msblk->meta_index[i].locked == 0) { -+ TRACE("locate_meta_index: entry %d, offset %d\n", i, -+ msblk->meta_index[i].offset); -+ meta = &msblk->meta_index[i]; -+ offset = meta->offset; -+ } -+ -+ if (meta) -+ meta->locked = 1; -+ -+not_allocated: -+ up(&msblk->meta_index_mutex); -+ -+ return meta; -+} -+ -+ -+struct meta_index *empty_meta_index(struct inode *inode, int offset, int skip) -+{ -+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info; -+ struct meta_index *meta = NULL; -+ int i; -+ -+ down(&msblk->meta_index_mutex); -+ -+ TRACE("empty_meta_index: offset %d, skip %d\n", offset, skip); -+ -+ if(msblk->meta_index == NULL) { -+ if (!(msblk->meta_index = kmalloc(sizeof(struct meta_index) * -+ SQUASHFS_META_NUMBER, GFP_KERNEL))) { -+ ERROR("Failed to allocate meta_index\n"); -+ goto failed; -+ } -+ for(i = 0; i < SQUASHFS_META_NUMBER; i++) { -+ msblk->meta_index[i].inode_number = 0; -+ msblk->meta_index[i].locked = 0; -+ } -+ msblk->next_meta_index = 0; -+ } -+ -+ for(i = SQUASHFS_META_NUMBER; i && -+ msblk->meta_index[msblk->next_meta_index].locked; i --) -+ msblk->next_meta_index = (msblk->next_meta_index + 1) % -+ SQUASHFS_META_NUMBER; -+ -+ if(i == 0) { -+ TRACE("empty_meta_index: failed!\n"); -+ goto failed; -+ } -+ -+ TRACE("empty_meta_index: returned meta entry %d, %p\n", -+ msblk->next_meta_index, -+ &msblk->meta_index[msblk->next_meta_index]); -+ -+ meta = &msblk->meta_index[msblk->next_meta_index]; -+ msblk->next_meta_index = (msblk->next_meta_index + 1) % -+ SQUASHFS_META_NUMBER; -+ -+ meta->inode_number = inode->i_ino; -+ meta->offset = offset; -+ meta->skip = skip; -+ meta->entries = 0; -+ meta->locked = 1; -+ -+failed: -+ up(&msblk->meta_index_mutex); -+ return meta; -+} -+ -+ -+void release_meta_index(struct inode *inode, struct meta_index *meta) -+{ -+ meta->locked = 0; -+} -+ -+ -+static int read_block_index(struct super_block *s, int blocks, char *block_list, -+ long long *start_block, int *offset) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ unsigned int *block_listp; -+ int block = 0; -+ -+ if (msblk->swap) { -+ char sblock_list[blocks << 2]; -+ -+ if (!squashfs_get_cached_block(s, sblock_list, *start_block, -+ *offset, blocks << 2, start_block, offset)) { -+ ERROR("Unable to read block list [%llx:%x]\n", -+ *start_block, *offset); -+ goto failure; -+ } -+ SQUASHFS_SWAP_INTS(((unsigned int *)block_list), -+ ((unsigned int *)sblock_list), blocks); -+ } else -+ if (!squashfs_get_cached_block(s, block_list, *start_block, -+ *offset, blocks << 2, start_block, offset)) { -+ ERROR("Unable to read block list [%llx:%x]\n", -+ *start_block, *offset); -+ goto failure; -+ } -+ -+ for (block_listp = (unsigned int *) block_list; blocks; -+ block_listp++, blocks --) -+ block += SQUASHFS_COMPRESSED_SIZE_BLOCK(*block_listp); -+ -+ return block; -+ -+failure: -+ return -1; -+} -+ -+ -+#define SIZE 256 -+ -+static inline int calculate_skip(int blocks) { -+ int skip = (blocks - 1) / ((SQUASHFS_SLOTS * SQUASHFS_META_ENTRIES + 1) * SQUASHFS_META_INDEXES); -+ return skip >= 7 ? 7 : skip + 1; -+} -+ -+ -+static int get_meta_index(struct inode *inode, int index, -+ long long *index_block, int *index_offset, -+ long long *data_block, char *block_list) -+{ -+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ int skip = calculate_skip(i_size_read(inode) >> sblk->block_log); -+ int offset = 0; -+ struct meta_index *meta; -+ struct meta_entry *meta_entry; -+ long long cur_index_block = SQUASHFS_I(inode)->u.s1.block_list_start; -+ int cur_offset = SQUASHFS_I(inode)->offset; -+ long long cur_data_block = SQUASHFS_I(inode)->start_block; -+ int i; -+ -+ index /= SQUASHFS_META_INDEXES * skip; -+ -+ while ( offset < index ) { -+ meta = locate_meta_index(inode, index, offset + 1); -+ -+ if (meta == NULL) { -+ if ((meta = empty_meta_index(inode, offset + 1, -+ skip)) == NULL) -+ goto all_done; -+ } else { -+ offset = index < meta->offset + meta->entries ? index : -+ meta->offset + meta->entries - 1; -+ meta_entry = &meta->meta_entry[offset - meta->offset]; -+ cur_index_block = meta_entry->index_block + sblk->inode_table_start; -+ cur_offset = meta_entry->offset; -+ cur_data_block = meta_entry->data_block; -+ TRACE("get_meta_index: offset %d, meta->offset %d, " -+ "meta->entries %d\n", offset, meta->offset, -+ meta->entries); -+ TRACE("get_meta_index: index_block 0x%llx, offset 0x%x" -+ " data_block 0x%llx\n", cur_index_block, -+ cur_offset, cur_data_block); -+ } -+ -+ for (i = meta->offset + meta->entries; i <= index && -+ i < meta->offset + SQUASHFS_META_ENTRIES; i++) { -+ int blocks = skip * SQUASHFS_META_INDEXES; -+ -+ while (blocks) { -+ int block = blocks > (SIZE >> 2) ? (SIZE >> 2) : -+ blocks; -+ int res = read_block_index(inode->i_sb, block, -+ block_list, &cur_index_block, -+ &cur_offset); -+ -+ if (res == -1) -+ goto failed; -+ -+ cur_data_block += res; -+ blocks -= block; -+ } -+ -+ meta_entry = &meta->meta_entry[i - meta->offset]; -+ meta_entry->index_block = cur_index_block - sblk->inode_table_start; -+ meta_entry->offset = cur_offset; -+ meta_entry->data_block = cur_data_block; -+ meta->entries ++; -+ offset ++; -+ } -+ -+ TRACE("get_meta_index: meta->offset %d, meta->entries %d\n", -+ meta->offset, meta->entries); -+ -+ release_meta_index(inode, meta); -+ } -+ -+all_done: -+ *index_block = cur_index_block; -+ *index_offset = cur_offset; -+ *data_block = cur_data_block; -+ -+ return offset * SQUASHFS_META_INDEXES * skip; -+ -+failed: -+ release_meta_index(inode, meta); -+ return -1; -+} -+ -+ -+static long long read_blocklist(struct inode *inode, int index, -+ int readahead_blks, char *block_list, -+ unsigned short **block_p, unsigned int *bsize) -+{ -+ long long block_ptr; -+ int offset; -+ long long block; -+ int res = get_meta_index(inode, index, &block_ptr, &offset, &block, -+ block_list); -+ -+ TRACE("read_blocklist: res %d, index %d, block_ptr 0x%llx, offset" -+ " 0x%x, block 0x%llx\n", res, index, block_ptr, offset, -+ block); -+ -+ if(res == -1) -+ goto failure; -+ -+ index -= res; -+ -+ while ( index ) { -+ int blocks = index > (SIZE >> 2) ? (SIZE >> 2) : index; -+ int res = read_block_index(inode->i_sb, blocks, block_list, -+ &block_ptr, &offset); -+ if (res == -1) -+ goto failure; -+ block += res; -+ index -= blocks; -+ } -+ -+ if (read_block_index(inode->i_sb, 1, block_list, -+ &block_ptr, &offset) == -1) -+ goto failure; -+ *bsize = *((unsigned int *) block_list); -+ -+ return block; -+ -+failure: -+ return 0; -+} -+ -+ -+static int squashfs_readpage(struct file *file, struct page *page) -+{ -+ struct inode *inode = page->mapping->host; -+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ unsigned char block_list[SIZE]; -+ long long block; -+ unsigned int bsize, i = 0, bytes = 0, byte_offset = 0; -+ int index = page->index >> (sblk->block_log - PAGE_CACHE_SHIFT); -+ void *pageaddr; -+ struct squashfs_fragment_cache *fragment = NULL; -+ char *data_ptr = msblk->read_page; -+ -+ int mask = (1 << (sblk->block_log - PAGE_CACHE_SHIFT)) - 1; -+ int start_index = page->index & ~mask; -+ int end_index = start_index | mask; -+ -+ TRACE("Entered squashfs_readpage, page index %lx, start block %llx\n", -+ page->index, -+ SQUASHFS_I(inode)->start_block); -+ -+ if (page->index >= ((i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> -+ PAGE_CACHE_SHIFT)) -+ goto skip_read; -+ -+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK -+ || index < (i_size_read(inode) >> -+ sblk->block_log)) { -+ if ((block = (msblk->read_blocklist)(inode, index, 1, -+ block_list, NULL, &bsize)) == 0) -+ goto skip_read; -+ -+ down(&msblk->read_page_mutex); -+ -+ if (!(bytes = squashfs_read_data(inode->i_sb, msblk->read_page, -+ block, bsize, NULL))) { -+ ERROR("Unable to read page, block %llx, size %x\n", block, -+ bsize); -+ up(&msblk->read_page_mutex); -+ goto skip_read; -+ } -+ } else { -+ if ((fragment = get_cached_fragment(inode->i_sb, -+ SQUASHFS_I(inode)-> -+ u.s1.fragment_start_block, -+ SQUASHFS_I(inode)->u.s1.fragment_size)) -+ == NULL) { -+ ERROR("Unable to read page, block %llx, size %x\n", -+ SQUASHFS_I(inode)-> -+ u.s1.fragment_start_block, -+ (int) SQUASHFS_I(inode)-> -+ u.s1.fragment_size); -+ goto skip_read; -+ } -+ bytes = SQUASHFS_I(inode)->u.s1.fragment_offset + -+ (i_size_read(inode) & (sblk->block_size -+ - 1)); -+ byte_offset = SQUASHFS_I(inode)->u.s1.fragment_offset; -+ data_ptr = fragment->data; -+ } -+ -+ for (i = start_index; i <= end_index && byte_offset < bytes; -+ i++, byte_offset += PAGE_CACHE_SIZE) { -+ struct page *push_page; -+ int available_bytes = (bytes - byte_offset) > PAGE_CACHE_SIZE ? -+ PAGE_CACHE_SIZE : bytes - byte_offset; -+ -+ TRACE("bytes %d, i %d, byte_offset %d, available_bytes %d\n", -+ bytes, i, byte_offset, available_bytes); -+ -+ if (i == page->index) { -+ pageaddr = kmap_atomic(page, KM_USER0); -+ memcpy(pageaddr, data_ptr + byte_offset, -+ available_bytes); -+ memset(pageaddr + available_bytes, 0, -+ PAGE_CACHE_SIZE - available_bytes); -+ kunmap_atomic(pageaddr, KM_USER0); -+ flush_dcache_page(page); -+ SetPageUptodate(page); -+ unlock_page(page); -+ } else if ((push_page = -+ grab_cache_page_nowait(page->mapping, i))) { -+ pageaddr = kmap_atomic(push_page, KM_USER0); -+ -+ memcpy(pageaddr, data_ptr + byte_offset, -+ available_bytes); -+ memset(pageaddr + available_bytes, 0, -+ PAGE_CACHE_SIZE - available_bytes); -+ kunmap_atomic(pageaddr, KM_USER0); -+ flush_dcache_page(push_page); -+ SetPageUptodate(push_page); -+ unlock_page(push_page); -+ page_cache_release(push_page); -+ } -+ } -+ -+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK -+ || index < (i_size_read(inode) >> -+ sblk->block_log)) -+ up(&msblk->read_page_mutex); -+ else -+ release_cached_fragment(msblk, fragment); -+ -+ return 0; -+ -+skip_read: -+ pageaddr = kmap_atomic(page, KM_USER0); -+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes); -+ kunmap_atomic(pageaddr, KM_USER0); -+ flush_dcache_page(page); -+ SetPageUptodate(page); -+ unlock_page(page); -+ -+ return 0; -+} -+ -+ -+static int squashfs_readpage4K(struct file *file, struct page *page) -+{ -+ struct inode *inode = page->mapping->host; -+ struct squashfs_sb_info *msblk = inode->i_sb->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ unsigned char block_list[SIZE]; -+ long long block; -+ unsigned int bsize, bytes = 0; -+ void *pageaddr; -+ -+ TRACE("Entered squashfs_readpage4K, page index %lx, start block %llx\n", -+ page->index, -+ SQUASHFS_I(inode)->start_block); -+ -+ if (page->index >= ((i_size_read(inode) + PAGE_CACHE_SIZE - 1) >> -+ PAGE_CACHE_SHIFT)) { -+ pageaddr = kmap_atomic(page, KM_USER0); -+ goto skip_read; -+ } -+ -+ if (SQUASHFS_I(inode)->u.s1.fragment_start_block == SQUASHFS_INVALID_BLK -+ || page->index < (i_size_read(inode) >> -+ sblk->block_log)) { -+ block = (msblk->read_blocklist)(inode, page->index, 1, -+ block_list, NULL, &bsize); -+ -+ down(&msblk->read_page_mutex); -+ bytes = squashfs_read_data(inode->i_sb, msblk->read_page, block, -+ bsize, NULL); -+ pageaddr = kmap_atomic(page, KM_USER0); -+ if (bytes) -+ memcpy(pageaddr, msblk->read_page, bytes); -+ else -+ ERROR("Unable to read page, block %llx, size %x\n", -+ block, bsize); -+ up(&msblk->read_page_mutex); -+ } else { -+ struct squashfs_fragment_cache *fragment = -+ get_cached_fragment(inode->i_sb, -+ SQUASHFS_I(inode)-> -+ u.s1.fragment_start_block, -+ SQUASHFS_I(inode)-> u.s1.fragment_size); -+ pageaddr = kmap_atomic(page, KM_USER0); -+ if (fragment) { -+ bytes = i_size_read(inode) & (sblk->block_size - 1); -+ memcpy(pageaddr, fragment->data + SQUASHFS_I(inode)-> -+ u.s1.fragment_offset, bytes); -+ release_cached_fragment(msblk, fragment); -+ } else -+ ERROR("Unable to read page, block %llx, size %x\n", -+ SQUASHFS_I(inode)-> -+ u.s1.fragment_start_block, (int) -+ SQUASHFS_I(inode)-> u.s1.fragment_size); -+ } -+ -+skip_read: -+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes); -+ kunmap_atomic(pageaddr, KM_USER0); -+ flush_dcache_page(page); -+ SetPageUptodate(page); -+ unlock_page(page); -+ -+ return 0; -+} -+ -+ -+static int get_dir_index_using_offset(struct super_block *s, long long -+ *next_block, unsigned int *next_offset, -+ long long index_start, -+ unsigned int index_offset, int i_count, -+ long long f_pos) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ int i, length = 0; -+ struct squashfs_dir_index index; -+ -+ TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n", -+ i_count, (unsigned int) f_pos); -+ -+ f_pos =- 3; -+ if (f_pos == 0) -+ goto finish; -+ -+ for (i = 0; i < i_count; i++) { -+ if (msblk->swap) { -+ struct squashfs_dir_index sindex; -+ squashfs_get_cached_block(s, (char *) &sindex, -+ index_start, index_offset, -+ sizeof(sindex), &index_start, -+ &index_offset); -+ SQUASHFS_SWAP_DIR_INDEX(&index, &sindex); -+ } else -+ squashfs_get_cached_block(s, (char *) &index, -+ index_start, index_offset, -+ sizeof(index), &index_start, -+ &index_offset); -+ -+ if (index.index > f_pos) -+ break; -+ -+ squashfs_get_cached_block(s, NULL, index_start, index_offset, -+ index.size + 1, &index_start, -+ &index_offset); -+ -+ length = index.index; -+ *next_block = index.start_block + sblk->directory_table_start; -+ } -+ -+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE; -+ -+finish: -+ return length + 3; -+} -+ -+ -+static int get_dir_index_using_name(struct super_block *s, long long -+ *next_block, unsigned int *next_offset, -+ long long index_start, -+ unsigned int index_offset, int i_count, -+ const char *name, int size) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ int i, length = 0; -+ char buffer[sizeof(struct squashfs_dir_index) + SQUASHFS_NAME_LEN + 1]; -+ struct squashfs_dir_index *index = (struct squashfs_dir_index *) buffer; -+ char str[SQUASHFS_NAME_LEN + 1]; -+ -+ TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count); -+ -+ strncpy(str, name, size); -+ str[size] = '\0'; -+ -+ for (i = 0; i < i_count; i++) { -+ if (msblk->swap) { -+ struct squashfs_dir_index sindex; -+ squashfs_get_cached_block(s, (char *) &sindex, -+ index_start, index_offset, -+ sizeof(sindex), &index_start, -+ &index_offset); -+ SQUASHFS_SWAP_DIR_INDEX(index, &sindex); -+ } else -+ squashfs_get_cached_block(s, (char *) index, -+ index_start, index_offset, -+ sizeof(struct squashfs_dir_index), -+ &index_start, &index_offset); -+ -+ squashfs_get_cached_block(s, index->name, index_start, -+ index_offset, index->size + 1, -+ &index_start, &index_offset); -+ -+ index->name[index->size + 1] = '\0'; -+ -+ if (strcmp(index->name, str) > 0) -+ break; -+ -+ length = index->index; -+ *next_block = index->start_block + sblk->directory_table_start; -+ } -+ -+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE; -+ return length + 3; -+} -+ -+ -+static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir) -+{ -+ struct inode *i = file->f_dentry->d_inode; -+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ long long next_block = SQUASHFS_I(i)->start_block + -+ sblk->directory_table_start; -+ int next_offset = SQUASHFS_I(i)->offset, length = 0, dirs_read = 0, -+ dir_count; -+ struct squashfs_dir_header dirh; -+ char buffer[sizeof(struct squashfs_dir_entry) + SQUASHFS_NAME_LEN + 1]; -+ struct squashfs_dir_entry *dire = (struct squashfs_dir_entry *) buffer; -+ -+ TRACE("Entered squashfs_readdir [%llx:%x]\n", next_block, next_offset); -+ -+ while(file->f_pos < 3) { -+ char *name; -+ int size, i_ino; -+ -+ if(file->f_pos == 0) { -+ name = "."; -+ size = 1; -+ i_ino = i->i_ino; -+ } else { -+ name = ".."; -+ size = 2; -+ i_ino = SQUASHFS_I(i)->u.s2.parent_inode; -+ } -+ TRACE("Calling filldir(%x, %s, %d, %d, %d, %d)\n", -+ (unsigned int) dirent, name, size, (int) -+ file->f_pos, i_ino, -+ squashfs_filetype_table[1]); -+ -+ if (filldir(dirent, name, size, -+ file->f_pos, i_ino, -+ squashfs_filetype_table[1]) < 0) { -+ TRACE("Filldir returned less than 0\n"); -+ goto finish; -+ } -+ file->f_pos += size; -+ dirs_read++; -+ } -+ -+ length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset, -+ SQUASHFS_I(i)->u.s2.directory_index_start, -+ SQUASHFS_I(i)->u.s2.directory_index_offset, -+ SQUASHFS_I(i)->u.s2.directory_index_count, -+ file->f_pos); -+ -+ while (length < i_size_read(i)) { -+ /* read directory header */ -+ if (msblk->swap) { -+ struct squashfs_dir_header sdirh; -+ -+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh, -+ next_block, next_offset, sizeof(sdirh), -+ &next_block, &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(sdirh); -+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh); -+ } else { -+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh, -+ next_block, next_offset, sizeof(dirh), -+ &next_block, &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(dirh); -+ } -+ -+ dir_count = dirh.count + 1; -+ while (dir_count--) { -+ if (msblk->swap) { -+ struct squashfs_dir_entry sdire; -+ if (!squashfs_get_cached_block(i->i_sb, (char *) -+ &sdire, next_block, next_offset, -+ sizeof(sdire), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(sdire); -+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire); -+ } else { -+ if (!squashfs_get_cached_block(i->i_sb, (char *) -+ dire, next_block, next_offset, -+ sizeof(*dire), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(*dire); -+ } -+ -+ if (!squashfs_get_cached_block(i->i_sb, dire->name, -+ next_block, next_offset, -+ dire->size + 1, &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ length += dire->size + 1; -+ -+ if (file->f_pos >= length) -+ continue; -+ -+ dire->name[dire->size + 1] = '\0'; -+ -+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d, %d)\n", -+ (unsigned int) dirent, dire->name, -+ dire->size + 1, (int) file->f_pos, -+ dirh.start_block, dire->offset, -+ dirh.inode_number + dire->inode_number, -+ squashfs_filetype_table[dire->type]); -+ -+ if (filldir(dirent, dire->name, dire->size + 1, -+ file->f_pos, -+ dirh.inode_number + dire->inode_number, -+ squashfs_filetype_table[dire->type]) -+ < 0) { -+ TRACE("Filldir returned less than 0\n"); -+ goto finish; -+ } -+ file->f_pos = length; -+ dirs_read++; -+ } -+ } -+ -+finish: -+ return dirs_read; -+ -+failed_read: -+ ERROR("Unable to read directory block [%llx:%x]\n", next_block, -+ next_offset); -+ return 0; -+} -+ -+ -+static struct dentry *squashfs_lookup(struct inode *i, struct dentry *dentry, -+ struct nameidata *nd) -+{ -+ const unsigned char *name = dentry->d_name.name; -+ int len = dentry->d_name.len; -+ struct inode *inode = NULL; -+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ long long next_block = SQUASHFS_I(i)->start_block + -+ sblk->directory_table_start; -+ int next_offset = SQUASHFS_I(i)->offset, length = 0, -+ dir_count; -+ struct squashfs_dir_header dirh; -+ char buffer[sizeof(struct squashfs_dir_entry) + SQUASHFS_NAME_LEN]; -+ struct squashfs_dir_entry *dire = (struct squashfs_dir_entry *) buffer; -+ -+ TRACE("Entered squashfs_lookup [%llx:%x]\n", next_block, next_offset); -+ -+ if (len > SQUASHFS_NAME_LEN) -+ goto exit_loop; -+ -+ length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset, -+ SQUASHFS_I(i)->u.s2.directory_index_start, -+ SQUASHFS_I(i)->u.s2.directory_index_offset, -+ SQUASHFS_I(i)->u.s2.directory_index_count, name, -+ len); -+ -+ while (length < i_size_read(i)) { -+ /* read directory header */ -+ if (msblk->swap) { -+ struct squashfs_dir_header sdirh; -+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh, -+ next_block, next_offset, sizeof(sdirh), -+ &next_block, &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(sdirh); -+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh); -+ } else { -+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh, -+ next_block, next_offset, sizeof(dirh), -+ &next_block, &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(dirh); -+ } -+ -+ dir_count = dirh.count + 1; -+ while (dir_count--) { -+ if (msblk->swap) { -+ struct squashfs_dir_entry sdire; -+ if (!squashfs_get_cached_block(i->i_sb, (char *) -+ &sdire, next_block,next_offset, -+ sizeof(sdire), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(sdire); -+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire); -+ } else { -+ if (!squashfs_get_cached_block(i->i_sb, (char *) -+ dire, next_block,next_offset, -+ sizeof(*dire), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(*dire); -+ } -+ -+ if (!squashfs_get_cached_block(i->i_sb, dire->name, -+ next_block, next_offset, dire->size + 1, -+ &next_block, &next_offset)) -+ goto failed_read; -+ -+ length += dire->size + 1; -+ -+ if (name[0] < dire->name[0]) -+ goto exit_loop; -+ -+ if ((len == dire->size + 1) && !strncmp(name, -+ dire->name, len)) { -+ squashfs_inode_t ino = -+ SQUASHFS_MKINODE(dirh.start_block, -+ dire->offset); -+ -+ TRACE("calling squashfs_iget for directory " -+ "entry %s, inode %x:%x, %d\n", name, -+ dirh.start_block, dire->offset, -+ dirh.inode_number + dire->inode_number); -+ -+ inode = (msblk->iget)(i->i_sb, ino); -+ -+ goto exit_loop; -+ } -+ } -+ } -+ -+exit_loop: -+ d_add(dentry, inode); -+ return ERR_PTR(0); -+ -+failed_read: -+ ERROR("Unable to read directory block [%llx:%x]\n", next_block, -+ next_offset); -+ goto exit_loop; -+} -+ -+ -+static void squashfs_put_super(struct super_block *s) -+{ -+ int i; -+ -+ if (s->s_fs_info) { -+ struct squashfs_sb_info *sbi = s->s_fs_info; -+ if (sbi->block_cache) -+ for (i = 0; i < SQUASHFS_CACHED_BLKS; i++) -+ if (sbi->block_cache[i].block != -+ SQUASHFS_INVALID_BLK) -+ kfree(sbi->block_cache[i].data); -+ if (sbi->fragment) -+ for (i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++) -+ SQUASHFS_FREE(sbi->fragment[i].data); -+ kfree(sbi->fragment); -+ kfree(sbi->block_cache); -+ kfree(sbi->read_data); -+ kfree(sbi->read_page); -+ kfree(sbi->uid); -+ kfree(sbi->fragment_index); -+ kfree(sbi->fragment_index_2); -+ kfree(sbi->meta_index); -+ kfree(s->s_fs_info); -+ s->s_fs_info = NULL; -+ } -+} -+ -+ -+static int squashfs_get_sb(struct file_system_type *fs_type, -+ int flags, const char *dev_name, void *data, -+ struct vfsmount *mnt) -+{ -+ return get_sb_bdev(fs_type, flags, dev_name, data, squashfs_fill_super, mnt); -+} -+ -+ -+static int __init init_squashfs_fs(void) -+{ -+ int err = init_inodecache(); -+ if (err) -+ goto out; -+ -+ printk(KERN_INFO "squashfs: version 3.0 (2006/03/15) " -+ "Phillip Lougher\n"); -+ -+ if (!(stream.workspace = vmalloc(zlib_inflate_workspacesize()))) { -+ ERROR("Failed to allocate zlib workspace\n"); -+ destroy_inodecache(); -+ err = -ENOMEM; -+ goto out; -+ } -+ -+ if ((err = register_filesystem(&squashfs_fs_type))) { -+ vfree(stream.workspace); -+ destroy_inodecache(); -+ } -+ -+out: -+ return err; -+} -+ -+ -+static void __exit exit_squashfs_fs(void) -+{ -+ vfree(stream.workspace); -+ unregister_filesystem(&squashfs_fs_type); -+ destroy_inodecache(); -+} -+ -+ -+static struct kmem_cache * squashfs_inode_cachep; -+ -+ -+static struct inode *squashfs_alloc_inode(struct super_block *sb) -+{ -+ struct squashfs_inode_info *ei; -+ ei = kmem_cache_alloc(squashfs_inode_cachep, GFP_KERNEL); -+ if (!ei) -+ return NULL; -+ return &ei->vfs_inode; -+} -+ -+ -+static void squashfs_destroy_inode(struct inode *inode) -+{ -+ kmem_cache_free(squashfs_inode_cachep, SQUASHFS_I(inode)); -+} -+ -+ -+static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) -+{ -+ struct squashfs_inode_info *ei = foo; -+ -+ inode_init_once(&ei->vfs_inode); -+} -+ -+ -+static int __init init_inodecache(void) -+{ -+ squashfs_inode_cachep = kmem_cache_create("squashfs_inode_cache", -+ sizeof(struct squashfs_inode_info), -+ 0, SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT, -+ init_once); -+ if (squashfs_inode_cachep == NULL) -+ return -ENOMEM; -+ return 0; -+} -+ -+ -+static void destroy_inodecache(void) -+{ -+ kmem_cache_destroy(squashfs_inode_cachep); -+} -+ -+ -+module_init(init_squashfs_fs); -+module_exit(exit_squashfs_fs); -+MODULE_DESCRIPTION("squashfs, a compressed read-only filesystem"); -+MODULE_AUTHOR("Phillip Lougher <phillip@lougher.org.uk>"); -+MODULE_LICENSE("GPL"); ---- /dev/null -+++ b/fs/squashfs/Makefile -@@ -0,0 +1,7 @@ -+# -+# Makefile for the linux squashfs routines. -+# -+ -+obj-$(CONFIG_SQUASHFS) += squashfs.o -+squashfs-y += inode.o -+squashfs-y += squashfs2_0.o ---- /dev/null -+++ b/fs/squashfs/squashfs2_0.c -@@ -0,0 +1,758 @@ -+/* -+ * Squashfs - a compressed read only filesystem for Linux -+ * -+ * Copyright (c) 2002, 2003, 2004, 2005, 2006 -+ * Phillip Lougher <phillip@lougher.org.uk> -+ * -+ * This program is free software; you can redistribute it and/or -+ * modify it under the terms of the GNU General Public License -+ * as published by the Free Software Foundation; either version 2, -+ * or (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -+ * -+ * squashfs2_0.c -+ */ -+ -+#include <linux/types.h> -+#include <linux/squashfs_fs.h> -+#include <linux/module.h> -+#include <linux/errno.h> -+#include <linux/slab.h> -+#include <linux/fs.h> -+#include <linux/smp_lock.h> -+#include <linux/slab.h> -+#include <linux/squashfs_fs_sb.h> -+#include <linux/squashfs_fs_i.h> -+#include <linux/buffer_head.h> -+#include <linux/vfs.h> -+#include <linux/init.h> -+#include <linux/dcache.h> -+#include <linux/wait.h> -+#include <linux/zlib.h> -+#include <linux/blkdev.h> -+#include <linux/vmalloc.h> -+#include <asm/uaccess.h> -+#include <asm/semaphore.h> -+ -+#include "squashfs.h" -+static int squashfs_readdir_2(struct file *file, void *dirent, filldir_t filldir); -+static struct dentry *squashfs_lookup_2(struct inode *, struct dentry *, -+ struct nameidata *); -+ -+static struct file_operations squashfs_dir_ops_2 = { -+ .read = generic_read_dir, -+ .readdir = squashfs_readdir_2 -+}; -+ -+static struct inode_operations squashfs_dir_inode_ops_2 = { -+ .lookup = squashfs_lookup_2 -+}; -+ -+static unsigned char squashfs_filetype_table[] = { -+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK -+}; -+ -+static int read_fragment_index_table_2(struct super_block *s) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ -+ if (!(msblk->fragment_index_2 = kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES_2 -+ (sblk->fragments), GFP_KERNEL))) { -+ ERROR("Failed to allocate uid/gid table\n"); -+ return 0; -+ } -+ -+ if (SQUASHFS_FRAGMENT_INDEX_BYTES_2(sblk->fragments) && -+ !squashfs_read_data(s, (char *) -+ msblk->fragment_index_2, -+ sblk->fragment_table_start, -+ SQUASHFS_FRAGMENT_INDEX_BYTES_2 -+ (sblk->fragments) | -+ SQUASHFS_COMPRESSED_BIT_BLOCK, NULL)) { -+ ERROR("unable to read fragment index table\n"); -+ return 0; -+ } -+ -+ if (msblk->swap) { -+ int i; -+ unsigned int fragment; -+ -+ for (i = 0; i < SQUASHFS_FRAGMENT_INDEXES_2(sblk->fragments); -+ i++) { -+ SQUASHFS_SWAP_FRAGMENT_INDEXES_2((&fragment), -+ &msblk->fragment_index_2[i], 1); -+ msblk->fragment_index_2[i] = fragment; -+ } -+ } -+ -+ return 1; -+} -+ -+ -+static int get_fragment_location_2(struct super_block *s, unsigned int fragment, -+ long long *fragment_start_block, -+ unsigned int *fragment_size) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ long long start_block = -+ msblk->fragment_index_2[SQUASHFS_FRAGMENT_INDEX_2(fragment)]; -+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET_2(fragment); -+ struct squashfs_fragment_entry_2 fragment_entry; -+ -+ if (msblk->swap) { -+ struct squashfs_fragment_entry_2 sfragment_entry; -+ -+ if (!squashfs_get_cached_block(s, (char *) &sfragment_entry, -+ start_block, offset, -+ sizeof(sfragment_entry), &start_block, -+ &offset)) -+ goto out; -+ SQUASHFS_SWAP_FRAGMENT_ENTRY_2(&fragment_entry, &sfragment_entry); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) &fragment_entry, -+ start_block, offset, -+ sizeof(fragment_entry), &start_block, -+ &offset)) -+ goto out; -+ -+ *fragment_start_block = fragment_entry.start_block; -+ *fragment_size = fragment_entry.size; -+ -+ return 1; -+ -+out: -+ return 0; -+} -+ -+ -+static struct inode *squashfs_new_inode(struct super_block *s, -+ struct squashfs_base_inode_header_2 *inodeb, unsigned int ino) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ struct inode *i = new_inode(s); -+ -+ if (i) { -+ i->i_ino = ino; -+ i->i_mtime.tv_sec = sblk->mkfs_time; -+ i->i_atime.tv_sec = sblk->mkfs_time; -+ i->i_ctime.tv_sec = sblk->mkfs_time; -+ i->i_uid = msblk->uid[inodeb->uid]; -+ i->i_mode = inodeb->mode; -+ i->i_nlink = 1; -+ i->i_size = 0; -+ if (inodeb->guid == SQUASHFS_GUIDS) -+ i->i_gid = i->i_uid; -+ else -+ i->i_gid = msblk->guid[inodeb->guid]; -+ } -+ -+ return i; -+} -+ -+ -+static struct inode *squashfs_iget_2(struct super_block *s, squashfs_inode_t inode) -+{ -+ struct inode *i; -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ unsigned int block = SQUASHFS_INODE_BLK(inode) + -+ sblk->inode_table_start; -+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode); -+ unsigned int ino = SQUASHFS_MK_VFS_INODE(block -+ - sblk->inode_table_start, offset); -+ long long next_block; -+ unsigned int next_offset; -+ union squashfs_inode_header_2 id, sid; -+ struct squashfs_base_inode_header_2 *inodeb = &id.base, -+ *sinodeb = &sid.base; -+ -+ TRACE("Entered squashfs_iget\n"); -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) sinodeb, block, -+ offset, sizeof(*sinodeb), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_BASE_INODE_HEADER_2(inodeb, sinodeb, -+ sizeof(*sinodeb)); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) inodeb, block, -+ offset, sizeof(*inodeb), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ switch(inodeb->inode_type) { -+ case SQUASHFS_FILE_TYPE: { -+ struct squashfs_reg_inode_header_2 *inodep = &id.reg; -+ struct squashfs_reg_inode_header_2 *sinodep = &sid.reg; -+ long long frag_blk; -+ unsigned int frag_size; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_REG_INODE_HEADER_2(inodep, sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ frag_blk = SQUASHFS_INVALID_BLK; -+ if (inodep->fragment != SQUASHFS_INVALID_FRAG && -+ !get_fragment_location_2(s, -+ inodep->fragment, &frag_blk, &frag_size)) -+ goto failed_read; -+ -+ if((i = squashfs_new_inode(s, inodeb, ino)) == NULL) -+ goto failed_read1; -+ -+ i->i_size = inodep->file_size; -+ i->i_fop = &generic_ro_fops; -+ i->i_mode |= S_IFREG; -+ i->i_mtime.tv_sec = inodep->mtime; -+ i->i_atime.tv_sec = inodep->mtime; -+ i->i_ctime.tv_sec = inodep->mtime; -+ i->i_blocks = ((i->i_size - 1) >> 9) + 1; -+ i->i_blksize = PAGE_CACHE_SIZE; -+ SQUASHFS_I(i)->u.s1.fragment_start_block = frag_blk; -+ SQUASHFS_I(i)->u.s1.fragment_size = frag_size; -+ SQUASHFS_I(i)->u.s1.fragment_offset = inodep->offset; -+ SQUASHFS_I(i)->start_block = inodep->start_block; -+ SQUASHFS_I(i)->u.s1.block_list_start = next_block; -+ SQUASHFS_I(i)->offset = next_offset; -+ if (sblk->block_size > 4096) -+ i->i_data.a_ops = &squashfs_aops; -+ else -+ i->i_data.a_ops = &squashfs_aops_4K; -+ -+ TRACE("File inode %x:%x, start_block %x, " -+ "block_list_start %llx, offset %x\n", -+ SQUASHFS_INODE_BLK(inode), offset, -+ inodep->start_block, next_block, -+ next_offset); -+ break; -+ } -+ case SQUASHFS_DIR_TYPE: { -+ struct squashfs_dir_inode_header_2 *inodep = &id.dir; -+ struct squashfs_dir_inode_header_2 *sinodep = &sid.dir; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_DIR_INODE_HEADER_2(inodep, sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ if((i = squashfs_new_inode(s, inodeb, ino)) == NULL) -+ goto failed_read1; -+ -+ i->i_size = inodep->file_size; -+ i->i_op = &squashfs_dir_inode_ops_2; -+ i->i_fop = &squashfs_dir_ops_2; -+ i->i_mode |= S_IFDIR; -+ i->i_mtime.tv_sec = inodep->mtime; -+ i->i_atime.tv_sec = inodep->mtime; -+ i->i_ctime.tv_sec = inodep->mtime; -+ SQUASHFS_I(i)->start_block = inodep->start_block; -+ SQUASHFS_I(i)->offset = inodep->offset; -+ SQUASHFS_I(i)->u.s2.directory_index_count = 0; -+ SQUASHFS_I(i)->u.s2.parent_inode = 0; -+ -+ TRACE("Directory inode %x:%x, start_block %x, offset " -+ "%x\n", SQUASHFS_INODE_BLK(inode), -+ offset, inodep->start_block, -+ inodep->offset); -+ break; -+ } -+ case SQUASHFS_LDIR_TYPE: { -+ struct squashfs_ldir_inode_header_2 *inodep = &id.ldir; -+ struct squashfs_ldir_inode_header_2 *sinodep = &sid.ldir; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_LDIR_INODE_HEADER_2(inodep, -+ sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ if((i = squashfs_new_inode(s, inodeb, ino)) == NULL) -+ goto failed_read1; -+ -+ i->i_size = inodep->file_size; -+ i->i_op = &squashfs_dir_inode_ops_2; -+ i->i_fop = &squashfs_dir_ops_2; -+ i->i_mode |= S_IFDIR; -+ i->i_mtime.tv_sec = inodep->mtime; -+ i->i_atime.tv_sec = inodep->mtime; -+ i->i_ctime.tv_sec = inodep->mtime; -+ SQUASHFS_I(i)->start_block = inodep->start_block; -+ SQUASHFS_I(i)->offset = inodep->offset; -+ SQUASHFS_I(i)->u.s2.directory_index_start = next_block; -+ SQUASHFS_I(i)->u.s2.directory_index_offset = -+ next_offset; -+ SQUASHFS_I(i)->u.s2.directory_index_count = -+ inodep->i_count; -+ SQUASHFS_I(i)->u.s2.parent_inode = 0; -+ -+ TRACE("Long directory inode %x:%x, start_block %x, " -+ "offset %x\n", -+ SQUASHFS_INODE_BLK(inode), offset, -+ inodep->start_block, inodep->offset); -+ break; -+ } -+ case SQUASHFS_SYMLINK_TYPE: { -+ struct squashfs_symlink_inode_header_2 *inodep = -+ &id.symlink; -+ struct squashfs_symlink_inode_header_2 *sinodep = -+ &sid.symlink; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(inodep, -+ sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ if((i = squashfs_new_inode(s, inodeb, ino)) == NULL) -+ goto failed_read1; -+ -+ i->i_size = inodep->symlink_size; -+ i->i_op = &page_symlink_inode_operations; -+ i->i_data.a_ops = &squashfs_symlink_aops; -+ i->i_mode |= S_IFLNK; -+ SQUASHFS_I(i)->start_block = next_block; -+ SQUASHFS_I(i)->offset = next_offset; -+ -+ TRACE("Symbolic link inode %x:%x, start_block %llx, " -+ "offset %x\n", -+ SQUASHFS_INODE_BLK(inode), offset, -+ next_block, next_offset); -+ break; -+ } -+ case SQUASHFS_BLKDEV_TYPE: -+ case SQUASHFS_CHRDEV_TYPE: { -+ struct squashfs_dev_inode_header_2 *inodep = &id.dev; -+ struct squashfs_dev_inode_header_2 *sinodep = &sid.dev; -+ -+ if (msblk->swap) { -+ if (!squashfs_get_cached_block(s, (char *) -+ sinodep, block, offset, -+ sizeof(*sinodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ SQUASHFS_SWAP_DEV_INODE_HEADER_2(inodep, sinodep); -+ } else -+ if (!squashfs_get_cached_block(s, (char *) -+ inodep, block, offset, -+ sizeof(*inodep), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ if ((i = squashfs_new_inode(s, inodeb, ino)) == NULL) -+ goto failed_read1; -+ -+ i->i_mode |= (inodeb->inode_type == -+ SQUASHFS_CHRDEV_TYPE) ? S_IFCHR : -+ S_IFBLK; -+ init_special_inode(i, i->i_mode, -+ old_decode_dev(inodep->rdev)); -+ -+ TRACE("Device inode %x:%x, rdev %x\n", -+ SQUASHFS_INODE_BLK(inode), offset, -+ inodep->rdev); -+ break; -+ } -+ case SQUASHFS_FIFO_TYPE: -+ case SQUASHFS_SOCKET_TYPE: { -+ if ((i = squashfs_new_inode(s, inodeb, ino)) == NULL) -+ goto failed_read1; -+ -+ i->i_mode |= (inodeb->inode_type == SQUASHFS_FIFO_TYPE) -+ ? S_IFIFO : S_IFSOCK; -+ init_special_inode(i, i->i_mode, 0); -+ break; -+ } -+ default: -+ ERROR("Unknown inode type %d in squashfs_iget!\n", -+ inodeb->inode_type); -+ goto failed_read1; -+ } -+ -+ insert_inode_hash(i); -+ return i; -+ -+failed_read: -+ ERROR("Unable to read inode [%x:%x]\n", block, offset); -+ -+failed_read1: -+ return NULL; -+} -+ -+ -+static int get_dir_index_using_offset(struct super_block *s, long long -+ *next_block, unsigned int *next_offset, -+ long long index_start, -+ unsigned int index_offset, int i_count, -+ long long f_pos) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ int i, length = 0; -+ struct squashfs_dir_index_2 index; -+ -+ TRACE("Entered get_dir_index_using_offset, i_count %d, f_pos %d\n", -+ i_count, (unsigned int) f_pos); -+ -+ if (f_pos == 0) -+ goto finish; -+ -+ for (i = 0; i < i_count; i++) { -+ if (msblk->swap) { -+ struct squashfs_dir_index_2 sindex; -+ squashfs_get_cached_block(s, (char *) &sindex, -+ index_start, index_offset, -+ sizeof(sindex), &index_start, -+ &index_offset); -+ SQUASHFS_SWAP_DIR_INDEX_2(&index, &sindex); -+ } else -+ squashfs_get_cached_block(s, (char *) &index, -+ index_start, index_offset, -+ sizeof(index), &index_start, -+ &index_offset); -+ -+ if (index.index > f_pos) -+ break; -+ -+ squashfs_get_cached_block(s, NULL, index_start, index_offset, -+ index.size + 1, &index_start, -+ &index_offset); -+ -+ length = index.index; -+ *next_block = index.start_block + sblk->directory_table_start; -+ } -+ -+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE; -+ -+finish: -+ return length; -+} -+ -+ -+static int get_dir_index_using_name(struct super_block *s, long long -+ *next_block, unsigned int *next_offset, -+ long long index_start, -+ unsigned int index_offset, int i_count, -+ const char *name, int size) -+{ -+ struct squashfs_sb_info *msblk = s->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ int i, length = 0; -+ char buffer[sizeof(struct squashfs_dir_index_2) + SQUASHFS_NAME_LEN + 1]; -+ struct squashfs_dir_index_2 *index = (struct squashfs_dir_index_2 *) buffer; -+ char str[SQUASHFS_NAME_LEN + 1]; -+ -+ TRACE("Entered get_dir_index_using_name, i_count %d\n", i_count); -+ -+ strncpy(str, name, size); -+ str[size] = '\0'; -+ -+ for (i = 0; i < i_count; i++) { -+ if (msblk->swap) { -+ struct squashfs_dir_index_2 sindex; -+ squashfs_get_cached_block(s, (char *) &sindex, -+ index_start, index_offset, -+ sizeof(sindex), &index_start, -+ &index_offset); -+ SQUASHFS_SWAP_DIR_INDEX_2(index, &sindex); -+ } else -+ squashfs_get_cached_block(s, (char *) index, -+ index_start, index_offset, -+ sizeof(struct squashfs_dir_index_2), -+ &index_start, &index_offset); -+ -+ squashfs_get_cached_block(s, index->name, index_start, -+ index_offset, index->size + 1, -+ &index_start, &index_offset); -+ -+ index->name[index->size + 1] = '\0'; -+ -+ if (strcmp(index->name, str) > 0) -+ break; -+ -+ length = index->index; -+ *next_block = index->start_block + sblk->directory_table_start; -+ } -+ -+ *next_offset = (length + *next_offset) % SQUASHFS_METADATA_SIZE; -+ return length; -+} -+ -+ -+static int squashfs_readdir_2(struct file *file, void *dirent, filldir_t filldir) -+{ -+ struct inode *i = file->f_dentry->d_inode; -+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ long long next_block = SQUASHFS_I(i)->start_block + -+ sblk->directory_table_start; -+ int next_offset = SQUASHFS_I(i)->offset, length = 0, dirs_read = 0, -+ dir_count; -+ struct squashfs_dir_header_2 dirh; -+ char buffer[sizeof(struct squashfs_dir_entry_2) + SQUASHFS_NAME_LEN + 1]; -+ struct squashfs_dir_entry_2 *dire = (struct squashfs_dir_entry_2 *) buffer; -+ -+ TRACE("Entered squashfs_readdir_2 [%llx:%x]\n", next_block, next_offset); -+ -+ length = get_dir_index_using_offset(i->i_sb, &next_block, &next_offset, -+ SQUASHFS_I(i)->u.s2.directory_index_start, -+ SQUASHFS_I(i)->u.s2.directory_index_offset, -+ SQUASHFS_I(i)->u.s2.directory_index_count, -+ file->f_pos); -+ -+ while (length < i_size_read(i)) { -+ /* read directory header */ -+ if (msblk->swap) { -+ struct squashfs_dir_header_2 sdirh; -+ -+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh, -+ next_block, next_offset, sizeof(sdirh), -+ &next_block, &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(sdirh); -+ SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh); -+ } else { -+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh, -+ next_block, next_offset, sizeof(dirh), -+ &next_block, &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(dirh); -+ } -+ -+ dir_count = dirh.count + 1; -+ while (dir_count--) { -+ if (msblk->swap) { -+ struct squashfs_dir_entry_2 sdire; -+ if (!squashfs_get_cached_block(i->i_sb, (char *) -+ &sdire, next_block, next_offset, -+ sizeof(sdire), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(sdire); -+ SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire); -+ } else { -+ if (!squashfs_get_cached_block(i->i_sb, (char *) -+ dire, next_block, next_offset, -+ sizeof(*dire), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(*dire); -+ } -+ -+ if (!squashfs_get_cached_block(i->i_sb, dire->name, -+ next_block, next_offset, -+ dire->size + 1, &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ length += dire->size + 1; -+ -+ if (file->f_pos >= length) -+ continue; -+ -+ dire->name[dire->size + 1] = '\0'; -+ -+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d)\n", -+ (unsigned int) dirent, dire->name, -+ dire->size + 1, (int) file->f_pos, -+ dirh.start_block, dire->offset, -+ squashfs_filetype_table[dire->type]); -+ -+ if (filldir(dirent, dire->name, dire->size + 1, -+ file->f_pos, SQUASHFS_MK_VFS_INODE( -+ dirh.start_block, dire->offset), -+ squashfs_filetype_table[dire->type]) -+ < 0) { -+ TRACE("Filldir returned less than 0\n"); -+ goto finish; -+ } -+ file->f_pos = length; -+ dirs_read++; -+ } -+ } -+ -+finish: -+ return dirs_read; -+ -+failed_read: -+ ERROR("Unable to read directory block [%llx:%x]\n", next_block, -+ next_offset); -+ return 0; -+} -+ -+ -+static struct dentry *squashfs_lookup_2(struct inode *i, struct dentry *dentry, -+ struct nameidata *nd) -+{ -+ const unsigned char *name = dentry->d_name.name; -+ int len = dentry->d_name.len; -+ struct inode *inode = NULL; -+ struct squashfs_sb_info *msblk = i->i_sb->s_fs_info; -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ long long next_block = SQUASHFS_I(i)->start_block + -+ sblk->directory_table_start; -+ int next_offset = SQUASHFS_I(i)->offset, length = 0, -+ dir_count; -+ struct squashfs_dir_header_2 dirh; -+ char buffer[sizeof(struct squashfs_dir_entry_2) + SQUASHFS_NAME_LEN]; -+ struct squashfs_dir_entry_2 *dire = (struct squashfs_dir_entry_2 *) buffer; -+ int sorted = sblk->s_major == 2 && sblk->s_minor >= 1; -+ -+ TRACE("Entered squashfs_lookup [%llx:%x]\n", next_block, next_offset); -+ -+ if (len > SQUASHFS_NAME_LEN) -+ goto exit_loop; -+ -+ length = get_dir_index_using_name(i->i_sb, &next_block, &next_offset, -+ SQUASHFS_I(i)->u.s2.directory_index_start, -+ SQUASHFS_I(i)->u.s2.directory_index_offset, -+ SQUASHFS_I(i)->u.s2.directory_index_count, name, -+ len); -+ -+ while (length < i_size_read(i)) { -+ /* read directory header */ -+ if (msblk->swap) { -+ struct squashfs_dir_header_2 sdirh; -+ if (!squashfs_get_cached_block(i->i_sb, (char *) &sdirh, -+ next_block, next_offset, sizeof(sdirh), -+ &next_block, &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(sdirh); -+ SQUASHFS_SWAP_DIR_HEADER_2(&dirh, &sdirh); -+ } else { -+ if (!squashfs_get_cached_block(i->i_sb, (char *) &dirh, -+ next_block, next_offset, sizeof(dirh), -+ &next_block, &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(dirh); -+ } -+ -+ dir_count = dirh.count + 1; -+ while (dir_count--) { -+ if (msblk->swap) { -+ struct squashfs_dir_entry_2 sdire; -+ if (!squashfs_get_cached_block(i->i_sb, (char *) -+ &sdire, next_block,next_offset, -+ sizeof(sdire), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(sdire); -+ SQUASHFS_SWAP_DIR_ENTRY_2(dire, &sdire); -+ } else { -+ if (!squashfs_get_cached_block(i->i_sb, (char *) -+ dire, next_block,next_offset, -+ sizeof(*dire), &next_block, -+ &next_offset)) -+ goto failed_read; -+ -+ length += sizeof(*dire); -+ } -+ -+ if (!squashfs_get_cached_block(i->i_sb, dire->name, -+ next_block, next_offset, dire->size + 1, -+ &next_block, &next_offset)) -+ goto failed_read; -+ -+ length += dire->size + 1; -+ -+ if (sorted && name[0] < dire->name[0]) -+ goto exit_loop; -+ -+ if ((len == dire->size + 1) && !strncmp(name, -+ dire->name, len)) { -+ squashfs_inode_t ino = -+ SQUASHFS_MKINODE(dirh.start_block, -+ dire->offset); -+ -+ TRACE("calling squashfs_iget for directory " -+ "entry %s, inode %x:%x, %lld\n", name, -+ dirh.start_block, dire->offset, ino); -+ -+ inode = (msblk->iget)(i->i_sb, ino); -+ -+ goto exit_loop; -+ } -+ } -+ } -+ -+exit_loop: -+ d_add(dentry, inode); -+ return ERR_PTR(0); -+ -+failed_read: -+ ERROR("Unable to read directory block [%llx:%x]\n", next_block, -+ next_offset); -+ goto exit_loop; -+} -+ -+ -+int squashfs_2_0_supported(struct squashfs_sb_info *msblk) -+{ -+ struct squashfs_super_block *sblk = &msblk->sblk; -+ -+ msblk->iget = squashfs_iget_2; -+ msblk->read_fragment_index_table = read_fragment_index_table_2; -+ -+ sblk->bytes_used = sblk->bytes_used_2; -+ sblk->uid_start = sblk->uid_start_2; -+ sblk->guid_start = sblk->guid_start_2; -+ sblk->inode_table_start = sblk->inode_table_start_2; -+ sblk->directory_table_start = sblk->directory_table_start_2; -+ sblk->fragment_table_start = sblk->fragment_table_start_2; -+ -+ return 1; -+} ---- /dev/null -+++ b/fs/squashfs/squashfs.h -@@ -0,0 +1,86 @@ -+/* -+ * Squashfs - a compressed read only filesystem for Linux -+ * -+ * Copyright (c) 2002, 2003, 2004, 2005, 2006 -+ * Phillip Lougher <phillip@lougher.org.uk> -+ * -+ * This program is free software; you can redistribute it and/or -+ * modify it under the terms of the GNU General Public License -+ * as published by the Free Software Foundation; either version 2, -+ * or (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -+ * -+ * squashfs.h -+ */ -+ -+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY -+#undef CONFIG_SQUASHFS_1_0_COMPATIBILITY -+#endif -+ -+#ifdef SQUASHFS_TRACE -+#define TRACE(s, args...) printk(KERN_NOTICE "SQUASHFS: "s, ## args) -+#else -+#define TRACE(s, args...) {} -+#endif -+ -+#define ERROR(s, args...) printk(KERN_ERR "SQUASHFS error: "s, ## args) -+ -+#define SERROR(s, args...) do { \ -+ if (!silent) \ -+ printk(KERN_ERR "SQUASHFS error: "s, ## args);\ -+ } while(0) -+ -+#define WARNING(s, args...) printk(KERN_WARNING "SQUASHFS: "s, ## args) -+ -+static inline struct squashfs_inode_info *SQUASHFS_I(struct inode *inode) -+{ -+ return list_entry(inode, struct squashfs_inode_info, vfs_inode); -+} -+ -+#if defined(CONFIG_SQUASHFS_1_0_COMPATIBILITY ) || defined(CONFIG_SQUASHFS_2_0_COMPATIBILITY) -+#define SQSH_EXTERN -+extern unsigned int squashfs_read_data(struct super_block *s, char *buffer, -+ long long index, unsigned int length, -+ long long *next_index); -+extern int squashfs_get_cached_block(struct super_block *s, char *buffer, -+ long long block, unsigned int offset, -+ int length, long long *next_block, -+ unsigned int *next_offset); -+extern void release_cached_fragment(struct squashfs_sb_info *msblk, struct -+ squashfs_fragment_cache *fragment); -+extern struct squashfs_fragment_cache *get_cached_fragment(struct super_block -+ *s, long long start_block, -+ int length); -+extern struct address_space_operations squashfs_symlink_aops; -+extern struct address_space_operations squashfs_aops; -+extern struct address_space_operations squashfs_aops_4K; -+extern struct inode_operations squashfs_dir_inode_ops; -+#else -+#define SQSH_EXTERN static -+#endif -+ -+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY -+extern int squashfs_1_0_supported(struct squashfs_sb_info *msblk); -+#else -+static inline int squashfs_1_0_supported(struct squashfs_sb_info *msblk) -+{ -+ return 0; -+} -+#endif -+ -+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY -+extern int squashfs_2_0_supported(struct squashfs_sb_info *msblk); -+#else -+static inline int squashfs_2_0_supported(struct squashfs_sb_info *msblk) -+{ -+ return 0; -+} -+#endif ---- a/include/linux/magic.h -+++ b/include/linux/magic.h -@@ -35,6 +35,9 @@ - #define REISER2FS_SUPER_MAGIC_STRING "ReIsEr2Fs" - #define REISER2FS_JR_SUPER_MAGIC_STRING "ReIsEr3Fs" - -+#define SQUASHFS_MAGIC 0x73717368 -+#define SQUASHFS_MAGIC_SWAP 0x68737173 -+ - #define SMB_SUPER_MAGIC 0x517B - #define USBDEVICE_SUPER_MAGIC 0x9fa2 - #define CGROUP_SUPER_MAGIC 0x27e0eb ---- /dev/null -+++ b/include/linux/squashfs_fs.h -@@ -0,0 +1,911 @@ -+#ifndef SQUASHFS_FS -+#define SQUASHFS_FS -+ -+/* -+ * Squashfs -+ * -+ * Copyright (c) 2002, 2003, 2004, 2005, 2006 -+ * Phillip Lougher <phillip@lougher.org.uk> -+ * -+ * This program is free software; you can redistribute it and/or -+ * modify it under the terms of the GNU General Public License -+ * as published by the Free Software Foundation; either version 2, -+ * or (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -+ * -+ * squashfs_fs.h -+ */ -+ -+#ifndef CONFIG_SQUASHFS_2_0_COMPATIBILITY -+#define CONFIG_SQUASHFS_2_0_COMPATIBILITY -+#endif -+ -+#ifdef CONFIG_SQUASHFS_VMALLOC -+#define SQUASHFS_ALLOC(a) vmalloc(a) -+#define SQUASHFS_FREE(a) vfree(a) -+#else -+#define SQUASHFS_ALLOC(a) kmalloc(a, GFP_KERNEL) -+#define SQUASHFS_FREE(a) kfree(a) -+#endif -+#define SQUASHFS_CACHED_FRAGMENTS CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE -+#define SQUASHFS_MAJOR 3 -+#define SQUASHFS_MINOR 0 -+#define SQUASHFS_START 0 -+ -+/* size of metadata (inode and directory) blocks */ -+#define SQUASHFS_METADATA_SIZE 8192 -+#define SQUASHFS_METADATA_LOG 13 -+ -+/* default size of data blocks */ -+#define SQUASHFS_FILE_SIZE 65536 -+#define SQUASHFS_FILE_LOG 16 -+ -+#define SQUASHFS_FILE_MAX_SIZE 65536 -+ -+/* Max number of uids and gids */ -+#define SQUASHFS_UIDS 256 -+#define SQUASHFS_GUIDS 255 -+ -+/* Max length of filename (not 255) */ -+#define SQUASHFS_NAME_LEN 256 -+ -+#define SQUASHFS_INVALID ((long long) 0xffffffffffff) -+#define SQUASHFS_INVALID_FRAG ((unsigned int) 0xffffffff) -+#define SQUASHFS_INVALID_BLK ((long long) -1) -+#define SQUASHFS_USED_BLK ((long long) -2) -+ -+/* Filesystem flags */ -+#define SQUASHFS_NOI 0 -+#define SQUASHFS_NOD 1 -+#define SQUASHFS_CHECK 2 -+#define SQUASHFS_NOF 3 -+#define SQUASHFS_NO_FRAG 4 -+#define SQUASHFS_ALWAYS_FRAG 5 -+#define SQUASHFS_DUPLICATE 6 -+ -+#define SQUASHFS_BIT(flag, bit) ((flag >> bit) & 1) -+ -+#define SQUASHFS_UNCOMPRESSED_INODES(flags) SQUASHFS_BIT(flags, \ -+ SQUASHFS_NOI) -+ -+#define SQUASHFS_UNCOMPRESSED_DATA(flags) SQUASHFS_BIT(flags, \ -+ SQUASHFS_NOD) -+ -+#define SQUASHFS_UNCOMPRESSED_FRAGMENTS(flags) SQUASHFS_BIT(flags, \ -+ SQUASHFS_NOF) -+ -+#define SQUASHFS_NO_FRAGMENTS(flags) SQUASHFS_BIT(flags, \ -+ SQUASHFS_NO_FRAG) -+ -+#define SQUASHFS_ALWAYS_FRAGMENTS(flags) SQUASHFS_BIT(flags, \ -+ SQUASHFS_ALWAYS_FRAG) -+ -+#define SQUASHFS_DUPLICATES(flags) SQUASHFS_BIT(flags, \ -+ SQUASHFS_DUPLICATE) -+ -+#define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, \ -+ SQUASHFS_CHECK) -+ -+#define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, \ -+ duplicate_checking) (noi | (nod << 1) | (check_data << 2) \ -+ | (nof << 3) | (no_frag << 4) | (always_frag << 5) | \ -+ (duplicate_checking << 6)) -+ -+/* Max number of types and file types */ -+#define SQUASHFS_DIR_TYPE 1 -+#define SQUASHFS_FILE_TYPE 2 -+#define SQUASHFS_SYMLINK_TYPE 3 -+#define SQUASHFS_BLKDEV_TYPE 4 -+#define SQUASHFS_CHRDEV_TYPE 5 -+#define SQUASHFS_FIFO_TYPE 6 -+#define SQUASHFS_SOCKET_TYPE 7 -+#define SQUASHFS_LDIR_TYPE 8 -+#define SQUASHFS_LREG_TYPE 9 -+ -+/* 1.0 filesystem type definitions */ -+#define SQUASHFS_TYPES 5 -+#define SQUASHFS_IPC_TYPE 0 -+ -+/* Flag whether block is compressed or uncompressed, bit is set if block is -+ * uncompressed */ -+#define SQUASHFS_COMPRESSED_BIT (1 << 15) -+ -+#define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \ -+ (B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT) -+ -+#define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT)) -+ -+#define SQUASHFS_COMPRESSED_BIT_BLOCK (1 << 24) -+ -+#define SQUASHFS_COMPRESSED_SIZE_BLOCK(B) (((B) & \ -+ ~SQUASHFS_COMPRESSED_BIT_BLOCK) ? (B) & \ -+ ~SQUASHFS_COMPRESSED_BIT_BLOCK : SQUASHFS_COMPRESSED_BIT_BLOCK) -+ -+#define SQUASHFS_COMPRESSED_BLOCK(B) (!((B) & SQUASHFS_COMPRESSED_BIT_BLOCK)) -+ -+/* -+ * Inode number ops. Inodes consist of a compressed block number, and an -+ * uncompressed offset within that block -+ */ -+#define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16)) -+ -+#define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff)) -+ -+#define SQUASHFS_MKINODE(A, B) ((squashfs_inode_t)(((squashfs_inode_t) (A)\ -+ << 16) + (B))) -+ -+/* Compute 32 bit VFS inode number from squashfs inode number */ -+#define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + \ -+ ((b) >> 2) + 1)) -+/* XXX */ -+ -+/* Translate between VFS mode and squashfs mode */ -+#define SQUASHFS_MODE(a) ((a) & 0xfff) -+ -+/* fragment and fragment table defines */ -+#define SQUASHFS_FRAGMENT_BYTES(A) (A * sizeof(struct squashfs_fragment_entry)) -+ -+#define SQUASHFS_FRAGMENT_INDEX(A) (SQUASHFS_FRAGMENT_BYTES(A) / \ -+ SQUASHFS_METADATA_SIZE) -+ -+#define SQUASHFS_FRAGMENT_INDEX_OFFSET(A) (SQUASHFS_FRAGMENT_BYTES(A) % \ -+ SQUASHFS_METADATA_SIZE) -+ -+#define SQUASHFS_FRAGMENT_INDEXES(A) ((SQUASHFS_FRAGMENT_BYTES(A) + \ -+ SQUASHFS_METADATA_SIZE - 1) / \ -+ SQUASHFS_METADATA_SIZE) -+ -+#define SQUASHFS_FRAGMENT_INDEX_BYTES(A) (SQUASHFS_FRAGMENT_INDEXES(A) *\ -+ sizeof(long long)) -+ -+/* cached data constants for filesystem */ -+#define SQUASHFS_CACHED_BLKS 8 -+ -+#define SQUASHFS_MAX_FILE_SIZE_LOG 64 -+ -+#define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << \ -+ (SQUASHFS_MAX_FILE_SIZE_LOG - 2)) -+ -+#define SQUASHFS_MARKER_BYTE 0xff -+ -+/* meta index cache */ -+#define SQUASHFS_META_INDEXES (SQUASHFS_METADATA_SIZE / sizeof(unsigned int)) -+#define SQUASHFS_META_ENTRIES 31 -+#define SQUASHFS_META_NUMBER 8 -+#define SQUASHFS_SLOTS 4 -+ -+#include <linux/magic.h> -+ -+struct meta_entry { -+ long long data_block; -+ unsigned int index_block; -+ unsigned short offset; -+ unsigned short pad; -+}; -+ -+struct meta_index { -+ unsigned int inode_number; -+ unsigned int offset; -+ unsigned short entries; -+ unsigned short skip; -+ unsigned short locked; -+ unsigned short pad; -+ struct meta_entry meta_entry[SQUASHFS_META_ENTRIES]; -+}; -+ -+ -+/* -+ * definitions for structures on disk -+ */ -+ -+typedef long long squashfs_block_t; -+typedef long long squashfs_inode_t; -+ -+struct squashfs_super_block { -+ unsigned int s_magic; -+ unsigned int inodes; -+ unsigned int bytes_used_2; -+ unsigned int uid_start_2; -+ unsigned int guid_start_2; -+ unsigned int inode_table_start_2; -+ unsigned int directory_table_start_2; -+ unsigned int s_major:16; -+ unsigned int s_minor:16; -+ unsigned int block_size_1:16; -+ unsigned int block_log:16; -+ unsigned int flags:8; -+ unsigned int no_uids:8; -+ unsigned int no_guids:8; -+ unsigned int mkfs_time /* time of filesystem creation */; -+ squashfs_inode_t root_inode; -+ unsigned int block_size; -+ unsigned int fragments; -+ unsigned int fragment_table_start_2; -+ long long bytes_used; -+ long long uid_start; -+ long long guid_start; -+ long long inode_table_start; -+ long long directory_table_start; -+ long long fragment_table_start; -+ long long unused; -+} __attribute__ ((packed)); -+ -+struct squashfs_dir_index { -+ unsigned int index; -+ unsigned int start_block; -+ unsigned char size; -+ unsigned char name[0]; -+} __attribute__ ((packed)); -+ -+#define SQUASHFS_BASE_INODE_HEADER \ -+ unsigned int inode_type:4; \ -+ unsigned int mode:12; \ -+ unsigned int uid:8; \ -+ unsigned int guid:8; \ -+ unsigned int mtime; \ -+ unsigned int inode_number; -+ -+struct squashfs_base_inode_header { -+ SQUASHFS_BASE_INODE_HEADER; -+} __attribute__ ((packed)); -+ -+struct squashfs_ipc_inode_header { -+ SQUASHFS_BASE_INODE_HEADER; -+ unsigned int nlink; -+} __attribute__ ((packed)); -+ -+struct squashfs_dev_inode_header { -+ SQUASHFS_BASE_INODE_HEADER; -+ unsigned int nlink; -+ unsigned short rdev; -+} __attribute__ ((packed)); -+ -+struct squashfs_symlink_inode_header { -+ SQUASHFS_BASE_INODE_HEADER; -+ unsigned int nlink; -+ unsigned short symlink_size; -+ char symlink[0]; -+} __attribute__ ((packed)); -+ -+struct squashfs_reg_inode_header { -+ SQUASHFS_BASE_INODE_HEADER; -+ squashfs_block_t start_block; -+ unsigned int fragment; -+ unsigned int offset; -+ unsigned int file_size; -+ unsigned short block_list[0]; -+} __attribute__ ((packed)); -+ -+struct squashfs_lreg_inode_header { -+ SQUASHFS_BASE_INODE_HEADER; -+ unsigned int nlink; -+ squashfs_block_t start_block; -+ unsigned int fragment; -+ unsigned int offset; -+ long long file_size; -+ unsigned short block_list[0]; -+} __attribute__ ((packed)); -+ -+struct squashfs_dir_inode_header { -+ SQUASHFS_BASE_INODE_HEADER; -+ unsigned int nlink; -+ unsigned int file_size:19; -+ unsigned int offset:13; -+ unsigned int start_block; -+ unsigned int parent_inode; -+} __attribute__ ((packed)); -+ -+struct squashfs_ldir_inode_header { -+ SQUASHFS_BASE_INODE_HEADER; -+ unsigned int nlink; -+ unsigned int file_size:27; -+ unsigned int offset:13; -+ unsigned int start_block; -+ unsigned int i_count:16; -+ unsigned int parent_inode; -+ struct squashfs_dir_index index[0]; -+} __attribute__ ((packed)); -+ -+union squashfs_inode_header { -+ struct squashfs_base_inode_header base; -+ struct squashfs_dev_inode_header dev; -+ struct squashfs_symlink_inode_header symlink; -+ struct squashfs_reg_inode_header reg; -+ struct squashfs_lreg_inode_header lreg; -+ struct squashfs_dir_inode_header dir; -+ struct squashfs_ldir_inode_header ldir; -+ struct squashfs_ipc_inode_header ipc; -+}; -+ -+struct squashfs_dir_entry { -+ unsigned int offset:13; -+ unsigned int type:3; -+ unsigned int size:8; -+ int inode_number:16; -+ char name[0]; -+} __attribute__ ((packed)); -+ -+struct squashfs_dir_header { -+ unsigned int count:8; -+ unsigned int start_block; -+ unsigned int inode_number; -+} __attribute__ ((packed)); -+ -+struct squashfs_fragment_entry { -+ long long start_block; -+ unsigned int size; -+ unsigned int unused; -+} __attribute__ ((packed)); -+ -+extern int squashfs_uncompress_block(void *d, int dstlen, void *s, int srclen); -+extern int squashfs_uncompress_init(void); -+extern int squashfs_uncompress_exit(void); -+ -+/* -+ * macros to convert each packed bitfield structure from little endian to big -+ * endian and vice versa. These are needed when creating or using a filesystem -+ * on a machine with different byte ordering to the target architecture. -+ * -+ */ -+ -+#define SQUASHFS_SWAP_START \ -+ int bits;\ -+ int b_pos;\ -+ unsigned long long val;\ -+ unsigned char *s;\ -+ unsigned char *d; -+ -+#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_super_block));\ -+ SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\ -+ SQUASHFS_SWAP((s)->inodes, d, 32, 32);\ -+ SQUASHFS_SWAP((s)->bytes_used_2, d, 64, 32);\ -+ SQUASHFS_SWAP((s)->uid_start_2, d, 96, 32);\ -+ SQUASHFS_SWAP((s)->guid_start_2, d, 128, 32);\ -+ SQUASHFS_SWAP((s)->inode_table_start_2, d, 160, 32);\ -+ SQUASHFS_SWAP((s)->directory_table_start_2, d, 192, 32);\ -+ SQUASHFS_SWAP((s)->s_major, d, 224, 16);\ -+ SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\ -+ SQUASHFS_SWAP((s)->block_size_1, d, 256, 16);\ -+ SQUASHFS_SWAP((s)->block_log, d, 272, 16);\ -+ SQUASHFS_SWAP((s)->flags, d, 288, 8);\ -+ SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\ -+ SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\ -+ SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\ -+ SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\ -+ SQUASHFS_SWAP((s)->block_size, d, 408, 32);\ -+ SQUASHFS_SWAP((s)->fragments, d, 440, 32);\ -+ SQUASHFS_SWAP((s)->fragment_table_start_2, d, 472, 32);\ -+ SQUASHFS_SWAP((s)->bytes_used, d, 504, 64);\ -+ SQUASHFS_SWAP((s)->uid_start, d, 568, 64);\ -+ SQUASHFS_SWAP((s)->guid_start, d, 632, 64);\ -+ SQUASHFS_SWAP((s)->inode_table_start, d, 696, 64);\ -+ SQUASHFS_SWAP((s)->directory_table_start, d, 760, 64);\ -+ SQUASHFS_SWAP((s)->fragment_table_start, d, 824, 64);\ -+ SQUASHFS_SWAP((s)->unused, d, 888, 64);\ -+} -+ -+#define SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\ -+ SQUASHFS_MEMSET(s, d, n);\ -+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\ -+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\ -+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\ -+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\ -+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\ -+ SQUASHFS_SWAP((s)->inode_number, d, 64, 32); -+ -+#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, n)\ -+} -+ -+#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ -+ sizeof(struct squashfs_ipc_inode_header))\ -+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\ -+} -+ -+#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ -+ sizeof(struct squashfs_dev_inode_header)); \ -+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\ -+ SQUASHFS_SWAP((s)->rdev, d, 128, 16);\ -+} -+ -+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ -+ sizeof(struct squashfs_symlink_inode_header));\ -+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\ -+ SQUASHFS_SWAP((s)->symlink_size, d, 128, 16);\ -+} -+ -+#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ -+ sizeof(struct squashfs_reg_inode_header));\ -+ SQUASHFS_SWAP((s)->start_block, d, 96, 64);\ -+ SQUASHFS_SWAP((s)->fragment, d, 160, 32);\ -+ SQUASHFS_SWAP((s)->offset, d, 192, 32);\ -+ SQUASHFS_SWAP((s)->file_size, d, 224, 32);\ -+} -+ -+#define SQUASHFS_SWAP_LREG_INODE_HEADER(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ -+ sizeof(struct squashfs_lreg_inode_header));\ -+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\ -+ SQUASHFS_SWAP((s)->start_block, d, 128, 64);\ -+ SQUASHFS_SWAP((s)->fragment, d, 192, 32);\ -+ SQUASHFS_SWAP((s)->offset, d, 224, 32);\ -+ SQUASHFS_SWAP((s)->file_size, d, 256, 64);\ -+} -+ -+#define SQUASHFS_SWAP_DIR_INODE_HEADER(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ -+ sizeof(struct squashfs_dir_inode_header));\ -+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\ -+ SQUASHFS_SWAP((s)->file_size, d, 128, 19);\ -+ SQUASHFS_SWAP((s)->offset, d, 147, 13);\ -+ SQUASHFS_SWAP((s)->start_block, d, 160, 32);\ -+ SQUASHFS_SWAP((s)->parent_inode, d, 192, 32);\ -+} -+ -+#define SQUASHFS_SWAP_LDIR_INODE_HEADER(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE(s, d, \ -+ sizeof(struct squashfs_ldir_inode_header));\ -+ SQUASHFS_SWAP((s)->nlink, d, 96, 32);\ -+ SQUASHFS_SWAP((s)->file_size, d, 128, 27);\ -+ SQUASHFS_SWAP((s)->offset, d, 155, 13);\ -+ SQUASHFS_SWAP((s)->start_block, d, 168, 32);\ -+ SQUASHFS_SWAP((s)->i_count, d, 200, 16);\ -+ SQUASHFS_SWAP((s)->parent_inode, d, 216, 32);\ -+} -+ -+#define SQUASHFS_SWAP_DIR_INDEX(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index));\ -+ SQUASHFS_SWAP((s)->index, d, 0, 32);\ -+ SQUASHFS_SWAP((s)->start_block, d, 32, 32);\ -+ SQUASHFS_SWAP((s)->size, d, 64, 8);\ -+} -+ -+#define SQUASHFS_SWAP_DIR_HEADER(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header));\ -+ SQUASHFS_SWAP((s)->count, d, 0, 8);\ -+ SQUASHFS_SWAP((s)->start_block, d, 8, 32);\ -+ SQUASHFS_SWAP((s)->inode_number, d, 40, 32);\ -+} -+ -+#define SQUASHFS_SWAP_DIR_ENTRY(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry));\ -+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\ -+ SQUASHFS_SWAP((s)->type, d, 13, 3);\ -+ SQUASHFS_SWAP((s)->size, d, 16, 8);\ -+ SQUASHFS_SWAP((s)->inode_number, d, 24, 16);\ -+} -+ -+#define SQUASHFS_SWAP_FRAGMENT_ENTRY(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry));\ -+ SQUASHFS_SWAP((s)->start_block, d, 0, 64);\ -+ SQUASHFS_SWAP((s)->size, d, 64, 32);\ -+} -+ -+#define SQUASHFS_SWAP_SHORTS(s, d, n) {\ -+ int entry;\ -+ int bit_position;\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, n * 2);\ -+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \ -+ 16)\ -+ SQUASHFS_SWAP(s[entry], d, bit_position, 16);\ -+} -+ -+#define SQUASHFS_SWAP_INTS(s, d, n) {\ -+ int entry;\ -+ int bit_position;\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, n * 4);\ -+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \ -+ 32)\ -+ SQUASHFS_SWAP(s[entry], d, bit_position, 32);\ -+} -+ -+#define SQUASHFS_SWAP_LONG_LONGS(s, d, n) {\ -+ int entry;\ -+ int bit_position;\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, n * 8);\ -+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \ -+ 64)\ -+ SQUASHFS_SWAP(s[entry], d, bit_position, 64);\ -+} -+ -+#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\ -+ int entry;\ -+ int bit_position;\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, n * bits / 8);\ -+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += \ -+ bits)\ -+ SQUASHFS_SWAP(s[entry], d, bit_position, bits);\ -+} -+ -+#define SQUASHFS_SWAP_FRAGMENT_INDEXES(s, d, n) SQUASHFS_SWAP_LONG_LONGS(s, d, n) -+ -+#ifdef CONFIG_SQUASHFS_1_0_COMPATIBILITY -+ -+struct squashfs_base_inode_header_1 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:4; /* index into uid table */ -+ unsigned int guid:4; /* index into guid table */ -+} __attribute__ ((packed)); -+ -+struct squashfs_ipc_inode_header_1 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:4; /* index into uid table */ -+ unsigned int guid:4; /* index into guid table */ -+ unsigned int type:4; -+ unsigned int offset:4; -+} __attribute__ ((packed)); -+ -+struct squashfs_dev_inode_header_1 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:4; /* index into uid table */ -+ unsigned int guid:4; /* index into guid table */ -+ unsigned short rdev; -+} __attribute__ ((packed)); -+ -+struct squashfs_symlink_inode_header_1 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:4; /* index into uid table */ -+ unsigned int guid:4; /* index into guid table */ -+ unsigned short symlink_size; -+ char symlink[0]; -+} __attribute__ ((packed)); -+ -+struct squashfs_reg_inode_header_1 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:4; /* index into uid table */ -+ unsigned int guid:4; /* index into guid table */ -+ unsigned int mtime; -+ unsigned int start_block; -+ unsigned int file_size:32; -+ unsigned short block_list[0]; -+} __attribute__ ((packed)); -+ -+struct squashfs_dir_inode_header_1 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:4; /* index into uid table */ -+ unsigned int guid:4; /* index into guid table */ -+ unsigned int file_size:19; -+ unsigned int offset:13; -+ unsigned int mtime; -+ unsigned int start_block:24; -+} __attribute__ ((packed)); -+ -+#define SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n) \ -+ SQUASHFS_MEMSET(s, d, n);\ -+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\ -+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\ -+ SQUASHFS_SWAP((s)->uid, d, 16, 4);\ -+ SQUASHFS_SWAP((s)->guid, d, 20, 4); -+ -+#define SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, n) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, n)\ -+} -+ -+#define SQUASHFS_SWAP_IPC_INODE_HEADER_1(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \ -+ sizeof(struct squashfs_ipc_inode_header_1));\ -+ SQUASHFS_SWAP((s)->type, d, 24, 4);\ -+ SQUASHFS_SWAP((s)->offset, d, 28, 4);\ -+} -+ -+#define SQUASHFS_SWAP_DEV_INODE_HEADER_1(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \ -+ sizeof(struct squashfs_dev_inode_header_1));\ -+ SQUASHFS_SWAP((s)->rdev, d, 24, 16);\ -+} -+ -+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \ -+ sizeof(struct squashfs_symlink_inode_header_1));\ -+ SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\ -+} -+ -+#define SQUASHFS_SWAP_REG_INODE_HEADER_1(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \ -+ sizeof(struct squashfs_reg_inode_header_1));\ -+ SQUASHFS_SWAP((s)->mtime, d, 24, 32);\ -+ SQUASHFS_SWAP((s)->start_block, d, 56, 32);\ -+ SQUASHFS_SWAP((s)->file_size, d, 88, 32);\ -+} -+ -+#define SQUASHFS_SWAP_DIR_INODE_HEADER_1(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_1(s, d, \ -+ sizeof(struct squashfs_dir_inode_header_1));\ -+ SQUASHFS_SWAP((s)->file_size, d, 24, 19);\ -+ SQUASHFS_SWAP((s)->offset, d, 43, 13);\ -+ SQUASHFS_SWAP((s)->mtime, d, 56, 32);\ -+ SQUASHFS_SWAP((s)->start_block, d, 88, 24);\ -+} -+ -+#endif -+ -+#ifdef CONFIG_SQUASHFS_2_0_COMPATIBILITY -+ -+struct squashfs_dir_index_2 { -+ unsigned int index:27; -+ unsigned int start_block:29; -+ unsigned char size; -+ unsigned char name[0]; -+} __attribute__ ((packed)); -+ -+struct squashfs_base_inode_header_2 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:8; /* index into uid table */ -+ unsigned int guid:8; /* index into guid table */ -+} __attribute__ ((packed)); -+ -+struct squashfs_ipc_inode_header_2 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:8; /* index into uid table */ -+ unsigned int guid:8; /* index into guid table */ -+} __attribute__ ((packed)); -+ -+struct squashfs_dev_inode_header_2 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:8; /* index into uid table */ -+ unsigned int guid:8; /* index into guid table */ -+ unsigned short rdev; -+} __attribute__ ((packed)); -+ -+struct squashfs_symlink_inode_header_2 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:8; /* index into uid table */ -+ unsigned int guid:8; /* index into guid table */ -+ unsigned short symlink_size; -+ char symlink[0]; -+} __attribute__ ((packed)); -+ -+struct squashfs_reg_inode_header_2 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:8; /* index into uid table */ -+ unsigned int guid:8; /* index into guid table */ -+ unsigned int mtime; -+ unsigned int start_block; -+ unsigned int fragment; -+ unsigned int offset; -+ unsigned int file_size:32; -+ unsigned short block_list[0]; -+} __attribute__ ((packed)); -+ -+struct squashfs_dir_inode_header_2 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:8; /* index into uid table */ -+ unsigned int guid:8; /* index into guid table */ -+ unsigned int file_size:19; -+ unsigned int offset:13; -+ unsigned int mtime; -+ unsigned int start_block:24; -+} __attribute__ ((packed)); -+ -+struct squashfs_ldir_inode_header_2 { -+ unsigned int inode_type:4; -+ unsigned int mode:12; /* protection */ -+ unsigned int uid:8; /* index into uid table */ -+ unsigned int guid:8; /* index into guid table */ -+ unsigned int file_size:27; -+ unsigned int offset:13; -+ unsigned int mtime; -+ unsigned int start_block:24; -+ unsigned int i_count:16; -+ struct squashfs_dir_index_2 index[0]; -+} __attribute__ ((packed)); -+ -+union squashfs_inode_header_2 { -+ struct squashfs_base_inode_header_2 base; -+ struct squashfs_dev_inode_header_2 dev; -+ struct squashfs_symlink_inode_header_2 symlink; -+ struct squashfs_reg_inode_header_2 reg; -+ struct squashfs_dir_inode_header_2 dir; -+ struct squashfs_ldir_inode_header_2 ldir; -+ struct squashfs_ipc_inode_header_2 ipc; -+}; -+ -+struct squashfs_dir_header_2 { -+ unsigned int count:8; -+ unsigned int start_block:24; -+} __attribute__ ((packed)); -+ -+struct squashfs_dir_entry_2 { -+ unsigned int offset:13; -+ unsigned int type:3; -+ unsigned int size:8; -+ char name[0]; -+} __attribute__ ((packed)); -+ -+struct squashfs_fragment_entry_2 { -+ unsigned int start_block; -+ unsigned int size; -+} __attribute__ ((packed)); -+ -+#define SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\ -+ SQUASHFS_MEMSET(s, d, n);\ -+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\ -+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\ -+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\ -+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\ -+ -+#define SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, n) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, n)\ -+} -+ -+#define SQUASHFS_SWAP_IPC_INODE_HEADER_2(s, d) \ -+ SQUASHFS_SWAP_BASE_INODE_HEADER_2(s, d, sizeof(struct squashfs_ipc_inode_header_2)) -+ -+#define SQUASHFS_SWAP_DEV_INODE_HEADER_2(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \ -+ sizeof(struct squashfs_dev_inode_header_2)); \ -+ SQUASHFS_SWAP((s)->rdev, d, 32, 16);\ -+} -+ -+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_2(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \ -+ sizeof(struct squashfs_symlink_inode_header_2));\ -+ SQUASHFS_SWAP((s)->symlink_size, d, 32, 16);\ -+} -+ -+#define SQUASHFS_SWAP_REG_INODE_HEADER_2(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \ -+ sizeof(struct squashfs_reg_inode_header_2));\ -+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\ -+ SQUASHFS_SWAP((s)->start_block, d, 64, 32);\ -+ SQUASHFS_SWAP((s)->fragment, d, 96, 32);\ -+ SQUASHFS_SWAP((s)->offset, d, 128, 32);\ -+ SQUASHFS_SWAP((s)->file_size, d, 160, 32);\ -+} -+ -+#define SQUASHFS_SWAP_DIR_INODE_HEADER_2(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \ -+ sizeof(struct squashfs_dir_inode_header_2));\ -+ SQUASHFS_SWAP((s)->file_size, d, 32, 19);\ -+ SQUASHFS_SWAP((s)->offset, d, 51, 13);\ -+ SQUASHFS_SWAP((s)->mtime, d, 64, 32);\ -+ SQUASHFS_SWAP((s)->start_block, d, 96, 24);\ -+} -+ -+#define SQUASHFS_SWAP_LDIR_INODE_HEADER_2(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_SWAP_BASE_INODE_CORE_2(s, d, \ -+ sizeof(struct squashfs_ldir_inode_header_2));\ -+ SQUASHFS_SWAP((s)->file_size, d, 32, 27);\ -+ SQUASHFS_SWAP((s)->offset, d, 59, 13);\ -+ SQUASHFS_SWAP((s)->mtime, d, 72, 32);\ -+ SQUASHFS_SWAP((s)->start_block, d, 104, 24);\ -+ SQUASHFS_SWAP((s)->i_count, d, 128, 16);\ -+} -+ -+#define SQUASHFS_SWAP_DIR_INDEX_2(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_index_2));\ -+ SQUASHFS_SWAP((s)->index, d, 0, 27);\ -+ SQUASHFS_SWAP((s)->start_block, d, 27, 29);\ -+ SQUASHFS_SWAP((s)->size, d, 56, 8);\ -+} -+#define SQUASHFS_SWAP_DIR_HEADER_2(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_header_2));\ -+ SQUASHFS_SWAP((s)->count, d, 0, 8);\ -+ SQUASHFS_SWAP((s)->start_block, d, 8, 24);\ -+} -+ -+#define SQUASHFS_SWAP_DIR_ENTRY_2(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_dir_entry_2));\ -+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\ -+ SQUASHFS_SWAP((s)->type, d, 13, 3);\ -+ SQUASHFS_SWAP((s)->size, d, 16, 8);\ -+} -+ -+#define SQUASHFS_SWAP_FRAGMENT_ENTRY_2(s, d) {\ -+ SQUASHFS_SWAP_START\ -+ SQUASHFS_MEMSET(s, d, sizeof(struct squashfs_fragment_entry_2));\ -+ SQUASHFS_SWAP((s)->start_block, d, 0, 32);\ -+ SQUASHFS_SWAP((s)->size, d, 32, 32);\ -+} -+ -+#define SQUASHFS_SWAP_FRAGMENT_INDEXES_2(s, d, n) SQUASHFS_SWAP_INTS(s, d, n) -+ -+/* fragment and fragment table defines */ -+#define SQUASHFS_FRAGMENT_BYTES_2(A) (A * sizeof(struct squashfs_fragment_entry_2)) -+ -+#define SQUASHFS_FRAGMENT_INDEX_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) / \ -+ SQUASHFS_METADATA_SIZE) -+ -+#define SQUASHFS_FRAGMENT_INDEX_OFFSET_2(A) (SQUASHFS_FRAGMENT_BYTES_2(A) % \ -+ SQUASHFS_METADATA_SIZE) -+ -+#define SQUASHFS_FRAGMENT_INDEXES_2(A) ((SQUASHFS_FRAGMENT_BYTES_2(A) + \ -+ SQUASHFS_METADATA_SIZE - 1) / \ -+ SQUASHFS_METADATA_SIZE) -+ -+#define SQUASHFS_FRAGMENT_INDEX_BYTES_2(A) (SQUASHFS_FRAGMENT_INDEXES_2(A) *\ -+ sizeof(int)) -+ -+#endif -+ -+#ifdef __KERNEL__ -+ -+/* -+ * macros used to swap each structure entry, taking into account -+ * bitfields and different bitfield placing conventions on differing -+ * architectures -+ */ -+ -+#include <asm/byteorder.h> -+ -+#ifdef __BIG_ENDIAN -+ /* convert from little endian to big endian */ -+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \ -+ tbits, b_pos) -+#else -+ /* convert from big endian to little endian */ -+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, \ -+ tbits, 64 - tbits - b_pos) -+#endif -+ -+#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\ -+ b_pos = pos % 8;\ -+ val = 0;\ -+ s = (unsigned char *)p + (pos / 8);\ -+ d = ((unsigned char *) &val) + 7;\ -+ for(bits = 0; bits < (tbits + b_pos); bits += 8) \ -+ *d-- = *s++;\ -+ value = (val >> (SHIFT))/* & ((1 << tbits) - 1)*/;\ -+} -+ -+#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n); -+ -+#endif -+#endif ---- /dev/null -+++ b/include/linux/squashfs_fs_i.h -@@ -0,0 +1,45 @@ -+#ifndef SQUASHFS_FS_I -+#define SQUASHFS_FS_I -+/* -+ * Squashfs -+ * -+ * Copyright (c) 2002, 2003, 2004, 2005, 2006 -+ * Phillip Lougher <phillip@lougher.org.uk> -+ * -+ * This program is free software; you can redistribute it and/or -+ * modify it under the terms of the GNU General Public License -+ * as published by the Free Software Foundation; either version 2, -+ * or (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -+ * -+ * squashfs_fs_i.h -+ */ -+ -+struct squashfs_inode_info { -+ long long start_block; -+ unsigned int offset; -+ union { -+ struct { -+ long long fragment_start_block; -+ unsigned int fragment_size; -+ unsigned int fragment_offset; -+ long long block_list_start; -+ } s1; -+ struct { -+ long long directory_index_start; -+ unsigned int directory_index_offset; -+ unsigned int directory_index_count; -+ unsigned int parent_inode; -+ } s2; -+ } u; -+ struct inode vfs_inode; -+}; -+#endif ---- /dev/null -+++ b/include/linux/squashfs_fs_sb.h -@@ -0,0 +1,74 @@ -+#ifndef SQUASHFS_FS_SB -+#define SQUASHFS_FS_SB -+/* -+ * Squashfs -+ * -+ * Copyright (c) 2002, 2003, 2004, 2005, 2006 -+ * Phillip Lougher <phillip@lougher.org.uk> -+ * -+ * This program is free software; you can redistribute it and/or -+ * modify it under the terms of the GNU General Public License -+ * as published by the Free Software Foundation; either version 2, -+ * or (at your option) any later version. -+ * -+ * This program is distributed in the hope that it will be useful, -+ * but WITHOUT ANY WARRANTY; without even the implied warranty of -+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -+ * GNU General Public License for more details. -+ * -+ * You should have received a copy of the GNU General Public License -+ * along with this program; if not, write to the Free Software -+ * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -+ * -+ * squashfs_fs_sb.h -+ */ -+ -+#include <linux/squashfs_fs.h> -+ -+struct squashfs_cache { -+ long long block; -+ int length; -+ long long next_index; -+ char *data; -+}; -+ -+struct squashfs_fragment_cache { -+ long long block; -+ int length; -+ unsigned int locked; -+ char *data; -+}; -+ -+struct squashfs_sb_info { -+ struct squashfs_super_block sblk; -+ int devblksize; -+ int devblksize_log2; -+ int swap; -+ struct squashfs_cache *block_cache; -+ struct squashfs_fragment_cache *fragment; -+ int next_cache; -+ int next_fragment; -+ int next_meta_index; -+ unsigned int *uid; -+ unsigned int *guid; -+ long long *fragment_index; -+ unsigned int *fragment_index_2; -+ unsigned int read_size; -+ char *read_data; -+ char *read_page; -+ struct semaphore read_data_mutex; -+ struct semaphore read_page_mutex; -+ struct semaphore block_cache_mutex; -+ struct semaphore fragment_mutex; -+ struct semaphore meta_index_mutex; -+ wait_queue_head_t waitq; -+ wait_queue_head_t fragment_wait_queue; -+ struct meta_index *meta_index; -+ struct inode *(*iget)(struct super_block *s, squashfs_inode_t \ -+ inode); -+ long long (*read_blocklist)(struct inode *inode, int \ -+ index, int readahead_blks, char *block_list, \ -+ unsigned short **block_p, unsigned int *bsize); -+ int (*read_fragment_index_table)(struct super_block *s); -+}; -+#endif ---- a/init/do_mounts_rd.c -+++ b/init/do_mounts_rd.c -@@ -5,6 +5,7 @@ - #include <linux/ext2_fs.h> - #include <linux/romfs_fs.h> - #include <linux/cramfs_fs.h> -+#include <linux/squashfs_fs.h> - #include <linux/initrd.h> - #include <linux/string.h> - -@@ -39,6 +40,7 @@ static int __init crd_load(int in_fd, in - * numbers could not be found. - * - * We currently check for the following magic numbers: -+ * squashfs - * minix - * ext2 - * romfs -@@ -53,6 +55,7 @@ identify_ramdisk_image(int fd, int start - struct ext2_super_block *ext2sb; - struct romfs_super_block *romfsb; - struct cramfs_super *cramfsb; -+ struct squashfs_super_block *squashfsb; - int nblocks = -1; - unsigned char *buf; - -@@ -64,6 +67,7 @@ identify_ramdisk_image(int fd, int start - ext2sb = (struct ext2_super_block *) buf; - romfsb = (struct romfs_super_block *) buf; - cramfsb = (struct cramfs_super *) buf; -+ squashfsb = (struct squashfs_super_block *) buf; - memset(buf, 0xe5, size); - - /* -@@ -101,6 +105,15 @@ identify_ramdisk_image(int fd, int start - goto done; - } - -+ /* squashfs is at block zero too */ -+ if (squashfsb->s_magic == SQUASHFS_MAGIC) { -+ printk(KERN_NOTICE -+ "RAMDISK: squashfs filesystem found at block %d\n", -+ start_block); -+ nblocks = (squashfsb->bytes_used+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS; -+ goto done; -+ } -+ - /* - * Read block 1 to test for minix and ext2 superblock - */ |