diff options
| -rw-r--r-- | Documentation/filesystems/squashfs.txt | 6 | ||||
| -rw-r--r-- | fs/squashfs/cache.c | 30 | ||||
| -rw-r--r-- | fs/squashfs/inode.c | 4 | ||||
| -rw-r--r-- | fs/squashfs/squashfs_fs_sb.h | 1 | ||||
| -rw-r--r-- | fs/squashfs/super.c | 2 |
5 files changed, 28 insertions, 15 deletions
diff --git a/Documentation/filesystems/squashfs.txt b/Documentation/filesystems/squashfs.txt index 7db3ebda5a4c..403c090aca39 100644 --- a/Documentation/filesystems/squashfs.txt +++ b/Documentation/filesystems/squashfs.txt @@ -93,8 +93,8 @@ byte alignment: Compressed data blocks are written to the filesystem as files are read from the source directory, and checked for duplicates. Once all file data has been -written the completed inode, directory, fragment, export and uid/gid lookup -tables are written. +written the completed inode, directory, fragment, export, uid/gid lookup and +xattr tables are written. 3.1 Compression options ----------------------- @@ -151,7 +151,7 @@ in each metadata block. Directories are sorted in alphabetical order, and at lookup the index is scanned linearly looking for the first filename alphabetically larger than the filename being looked up. At this point the location of the metadata block the filename is in has been found. -The general idea of the index is ensure only one metadata block needs to be +The general idea of the index is to ensure only one metadata block needs to be decompressed to do a lookup irrespective of the length of the directory. This scheme has the advantage that it doesn't require extra memory overhead and doesn't require much extra storage on disk. diff --git a/fs/squashfs/cache.c b/fs/squashfs/cache.c index f744be98cd5a..af0b73802592 100644 --- a/fs/squashfs/cache.c +++ b/fs/squashfs/cache.c @@ -70,11 +70,15 @@ struct squashfs_cache_entry *squashfs_cache_get(struct super_block *sb, spin_lock(&cache->lock); while (1) { - for (i = 0; i < cache->entries; i++) - if (cache->entry[i].block == block) + for (i = cache->curr_blk, n = 0; n < cache->entries; n++) { + if (cache->entry[i].block == block) { + cache->curr_blk = i; break; + } + i = (i + 1) % cache->entries; + } - if (i == cache->entries) { + if (n == cache->entries) { /* * Block not in cache, if all cache entries are used * go to sleep waiting for one to become available. @@ -245,6 +249,7 @@ struct squashfs_cache *squashfs_cache_init(char *name, int entries, goto cleanup; } + cache->curr_blk = 0; cache->next_blk = 0; cache->unused = entries; cache->entries = entries; @@ -332,17 +337,20 @@ int squashfs_read_metadata(struct super_block *sb, void *buffer, u64 *block, int *offset, int length) { struct squashfs_sb_info *msblk = sb->s_fs_info; - int bytes, copied = length; + int bytes, res = length; struct squashfs_cache_entry *entry; TRACE("Entered squashfs_read_metadata [%llx:%x]\n", *block, *offset); while (length) { entry = squashfs_cache_get(sb, msblk->block_cache, *block, 0); - if (entry->error) - return entry->error; - else if (*offset >= entry->length) - return -EIO; + if (entry->error) { + res = entry->error; + goto error; + } else if (*offset >= entry->length) { + res = -EIO; + goto error; + } bytes = squashfs_copy_data(buffer, entry, *offset, length); if (buffer) @@ -358,7 +366,11 @@ int squashfs_read_metadata(struct super_block *sb, void *buffer, squashfs_cache_put(entry); } - return copied; + return res; + +error: + squashfs_cache_put(entry); + return res; } diff --git a/fs/squashfs/inode.c b/fs/squashfs/inode.c index fd7b3b3bda13..81afbccfa843 100644 --- a/fs/squashfs/inode.c +++ b/fs/squashfs/inode.c @@ -208,8 +208,8 @@ int squashfs_read_inode(struct inode *inode, long long ino) inode->i_op = &squashfs_inode_ops; inode->i_fop = &generic_ro_fops; inode->i_mode |= S_IFREG; - inode->i_blocks = ((inode->i_size - - le64_to_cpu(sqsh_ino->sparse) - 1) >> 9) + 1; + inode->i_blocks = (inode->i_size - + le64_to_cpu(sqsh_ino->sparse) + 511) >> 9; squashfs_i(inode)->fragment_block = frag_blk; squashfs_i(inode)->fragment_size = frag_size; diff --git a/fs/squashfs/squashfs_fs_sb.h b/fs/squashfs/squashfs_fs_sb.h index 651f0b31d296..52934a22f296 100644 --- a/fs/squashfs/squashfs_fs_sb.h +++ b/fs/squashfs/squashfs_fs_sb.h @@ -28,6 +28,7 @@ struct squashfs_cache { char *name; int entries; + int curr_blk; int next_blk; int num_waiters; int unused; diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c index d0858c2d9a47..ecaa2f7bdb8f 100644 --- a/fs/squashfs/super.c +++ b/fs/squashfs/super.c @@ -290,7 +290,7 @@ handle_fragments: check_directory_table: /* Sanity check directory_table */ - if (msblk->directory_table >= next_table) { + if (msblk->directory_table > next_table) { err = -EINVAL; goto failed_mount; } |