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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>
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1 changed files with 3 additions and 2 deletions
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@ -413,7 +413,7 @@ static int __add_inline_refs(struct btrfs_fs_info *fs_info,
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* enumerate all inline refs
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*/
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leaf = path->nodes[0];
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slot = path->slots[0] - 1;
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slot = path->slots[0];
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item_size = btrfs_item_size_nr(leaf, slot);
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BUG_ON(item_size < sizeof(*ei));
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@ -661,8 +661,9 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans,
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struct extent_buffer *leaf;
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int slot;
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path->slots[0]--;
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leaf = path->nodes[0];
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slot = path->slots[0] - 1;
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slot = path->slots[0];
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btrfs_item_key_to_cpu(leaf, &key, slot);
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if (key.objectid == bytenr &&
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key.type == BTRFS_EXTENT_ITEM_KEY) {
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