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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-13 10:34:57 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-13 10:34:57 -0800
commit96e80a7851b44f3decaac0625665cd64e550b71d (patch)
treea24d9f46c43b5fcf824c49b93d37982ab668aade /fs/squashfs
parent57e6a7dde8cfca9ac1d6702cf9104d22bc11ba90 (diff)
parent3d4a1c80c4eb97187b3a61b3bfa8c804327f7a45 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next
* git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next: Squashfs: fix i_blocks calculation with extended regular files Squashfs: fix mount time sanity check for corrupted superblock Squashfs: optimise squashfs_cache_get entry search Squashfs: Update documentation to include xattrs Squashfs: add missing block release on error condition
Diffstat (limited to 'fs/squashfs')
-rw-r--r--fs/squashfs/cache.c30
-rw-r--r--fs/squashfs/inode.c4
-rw-r--r--fs/squashfs/squashfs_fs_sb.h1
-rw-r--r--fs/squashfs/super.c2
4 files changed, 25 insertions, 12 deletions
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;
}