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authorYan Zheng <zheng.yan@oracle.com>2008-11-10 15:34:43 +0300
committerChris Mason <chris.mason@oracle.com>2008-11-10 15:34:43 +0300
commitff5b7ee33d82414bf4baf299c21fb703bcc89629 (patch)
tree926786cf57b375e5ef1f865427c910c3d4bdfc7a /fs/btrfs/extent_map.h
parentf2b1c41cf94d7f839fe9ede5f3ead92698a93fb3 (diff)
downloadlinux-ff5b7ee33d82414bf4baf299c21fb703bcc89629.tar.xz
Btrfs: Fix csum error for compressed data
The decompress code doesn't take the logical offset in extent pointer into account. If the logical offset isn't zero, data will be decompressed into wrong pages. The solution used here is to record the starting offset of the extent in the file separately from the logical start of the extent_map struct. This allows us to avoid problems inserting overlapping extents. Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Diffstat (limited to 'fs/btrfs/extent_map.h')
-rw-r--r--fs/btrfs/extent_map.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index accfedaeb513..fb6eeef06bb0 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -20,6 +20,7 @@ struct extent_map {
/* all of these are in bytes */
u64 start;
u64 len;
+ u64 orig_start;
u64 block_start;
u64 block_len;
unsigned long flags;