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authorJosef Bacik <jbacik@fb.com>2014-06-05 16:08:45 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-06-30 20:12:02 -0700
commit6858c106c6a0eaa458423b223154b0baf4450e03 (patch)
tree0463fa5d604727f98ff9742978ad141d22a4895a /fs/btrfs
parent3379d704fb52e2e989fb3c6f0bdf1d5e74387cb1 (diff)
Btrfs: don't check nodes for extent items
commit 8a56457f5f8fa7c2698ffae8545214c5b96a2cb5 upstream. The backref code was looking at nodes as well as leaves when we tried to populate extent item entries. This is not good, and although we go away with it for the most part because we'd skip where disk_bytenr != random_memory, sometimes random_memory would match and suddenly boom. This fixes that problem. Thanks, Signed-off-by: Josef Bacik <jbacik@fb.com> Signed-off-by: Chris Mason <clm@fb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 aded3ef3d3d4..36cca1dcec8e 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -972,11 +972,12 @@ again:
goto out;
}
if (ref->count && ref->parent) {
- if (extent_item_pos && !ref->inode_list) {
+ if (extent_item_pos && !ref->inode_list &&
+ ref->level == 0) {
u32 bsz;
struct extent_buffer *eb;
bsz = btrfs_level_size(fs_info->extent_root,
- info_level);
+ ref->level);
eb = read_tree_block(fs_info->extent_root,
ref->parent, bsz, 0);
if (!eb || !extent_buffer_uptodate(eb)) {