From dadcaf78b51e239d93f5ec9aac736de99081ee74 Mon Sep 17 00:00:00 2001 From: Jan Schmidt Date: Tue, 22 May 2012 13:43:25 +0200 Subject: [PATCH] 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 Signed-off-by: Jan Schmidt --- fs/btrfs/backref.c | 5 +++-- 1 file 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) { -- 2.20.1