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| author | Tao Ma <boyu.mt@taobao.com> | 2012-10-22 00:34:32 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2012-10-22 00:34:32 -0400 |
| commit | 79f1ba49569e5aec919b653c55b03274c2331701 (patch) | |
| tree | 612d4200d13a10d5df0cb6508cc5b1e7fd10fd45 /fs/ext4/ialloc.c | |
| parent | 76495ec1d47e1c0fe0673faf9179bda6bc8ab5c2 (diff) | |
| download | linux-79f1ba49569e5aec919b653c55b03274c2331701.tar.bz2 | |
ext4: Checksum the block bitmap properly with bigalloc enabled
In mke2fs, we only checksum the whole bitmap block and it is right.
While in the kernel, we use EXT4_BLOCKS_PER_GROUP to indicate the
size of the checksumed bitmap which is wrong when we enable bigalloc.
The right size should be EXT4_CLUSTERS_PER_GROUP and this patch fixes
it.
Also as every caller of ext4_block_bitmap_csum_set and
ext4_block_bitmap_csum_verify pass in EXT4_BLOCKS_PER_GROUP(sb)/8,
we'd better removes this parameter and sets it in the function itself.
Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/ext4/ialloc.c')
| -rw-r--r-- | fs/ext4/ialloc.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index fa36372f3fdf..4facdd29a350 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -762,9 +762,7 @@ got: ext4_free_group_clusters_set(sb, gdp, ext4_free_clusters_after_init(sb, group, gdp)); ext4_block_bitmap_csum_set(sb, group, gdp, - block_bitmap_bh, - EXT4_BLOCKS_PER_GROUP(sb) / - 8); + block_bitmap_bh); ext4_group_desc_csum_set(sb, group, gdp); } ext4_unlock_group(sb, group); |