In __btrfs_lookup_bio_sums() we set the file offset value at the
beginning of every iteration of the while loop. This is incorrect since
the blocks mapped by the current bvec->bv_page might not yet have been
completely processed.
This commit fixes the issue by setting the file offset value when we
move to the next bvec of the bio.
Signed-off-by: Chandan Rajendra <chan...@linux.vnet.ibm.com>
---
fs/btrfs/file-item.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index d0d571c..8fc09c1 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -222,11 +222,11 @@ static int __btrfs_lookup_bio_sums(struct btrfs_root
*root,
disk_bytenr = (u64)bio->bi_iter.bi_sector << 9;
if (dio)
offset = logical_offset;
+ else
+ offset = page_offset(bvec->bv_page) + bvec->bv_offset;
page_bytes_left = bvec->bv_len;
while (bio_index < bio->bi_vcnt) {
- if (!dio)
- offset = page_offset(bvec->bv_page) + bvec->bv_offset;
count = btrfs_find_ordered_sum(inode, offset, disk_bytenr,
(u32 *)csum, nblocks);
if (count)
@@ -301,6 +301,9 @@ found:
goto done;
}
bvec++;
+ if (!dio)
+ offset = page_offset(bvec->bv_page)
+ + bvec->bv_offset;
page_bytes_left = bvec->bv_len;
}
--
2.5.5
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