[PATCH v2 02/15] Btrfs: bugfix in btrfs_find_parent_nodes
From: Jan Schmidt <hidden>
Date: 2012-05-26 10:59:50
Subsystem:
btrfs file system, filesystems (vfs and infrastructure), the rest · Maintainers:
Chris Mason, David Sterba, Alexander Viro, Christian Brauner, Linus Torvalds
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 <redacted> Signed-off-by: Jan Schmidt <redacted> --- fs/btrfs/backref.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index b41d94a..c69a846 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) {
--
1.7.3.4