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authorTao Ma <boyu.mt@taobao.com>2012-10-22 00:34:32 -0400
committerTheodore Ts'o <tytso@mit.edu>2012-10-22 00:34:32 -0400
commit79f1ba49569e5aec919b653c55b03274c2331701 (patch)
tree612d4200d13a10d5df0cb6508cc5b1e7fd10fd45 /fs/ext4/ialloc.c
parent76495ec1d47e1c0fe0673faf9179bda6bc8ab5c2 (diff)
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.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index fa36372f3fd..4facdd29a35 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);