Liu Bo
2013-Jan-06 03:38 UTC
[PATCH] Btrfs: use right range to find checksum for compressed extents
For compressed extents, the range of checksum is covered by disk length,
and the disk length is different with ram length, so we need to use disk
length instead to get us the right checksum.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
---
fs/btrfs/tree-log.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 83186c7..0a3cd61 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -3357,6 +3357,11 @@ static int log_one_extent(struct btrfs_trans_handle
*trans,
if (skip_csum)
return 0;
+ if (em->compress_type) {
+ csum_offset = 0;
+ csum_len = block_len;
+ }
+
/* block start is already adjusted for the file extent offset. */
ret = btrfs_lookup_csums_range(log->fs_info->csum_root,
em->block_start + csum_offset,
--
1.7.7.6
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