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authorJan Schmidt <list.btrfs@jan-o-sch.net>2012-05-22 15:43:25 +0400
committerJan Schmidt <list.btrfs@jan-o-sch.net>2012-05-26 14:17:51 +0400
commitdadcaf78b51e239d93f5ec9aac736de99081ee74 (patch)
treed4c9e78136621f901300c5e8e0846babc59daea3 /fs/btrfs
parentcd1b413c5c863a96bfdeab8e91b1fb3a52665e42 (diff)
downloadlinux-dadcaf78b51e239d93f5ec9aac736de99081ee74.tar.xz
Btrfs: bugfix in btrfs_find_parent_nodes
That one has been around since the addition of backref.c. Due to the way we calculate our slot numbers, after adding inline refs we're missing one keyed ref unless it's located at the beginning of a new leaf. Reported-by: Alexander Block <ablock84@googlemail.com> Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/backref.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index b41d94a6471b..c69a846999bf 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -413,7 +413,7 @@ static int __add_inline_refs(struct btrfs_fs_info *fs_info,
* enumerate all inline refs
*/
leaf = path->nodes[0];
- slot = path->slots[0] - 1;
+ slot = path->slots[0];
item_size = btrfs_item_size_nr(leaf, slot);
BUG_ON(item_size < sizeof(*ei));
@@ -661,8 +661,9 @@ again:
struct extent_buffer *leaf;
int slot;
+ path->slots[0]--;
leaf = path->nodes[0];
- slot = path->slots[0] - 1;
+ slot = path->slots[0];
btrfs_item_key_to_cpu(leaf, &key, slot);
if (key.objectid == bytenr &&
key.type == BTRFS_EXTENT_ITEM_KEY) {