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Btrfs: support root level changes in __resolve_indirect_ref

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With the tree mod log, we can have a tree that's two levels high, but
btrfs_search_old_slot may still return a path with the tree root at level
one instead. __resolve_indirect_ref must care for this and accept parents in
a lower level than expected.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
This commit is contained in:
Jan Schmidt 2012-06-27 15:23:09 +02:00
parent 8ca78f3eda
commit 9345457f4a
1 changed files with 8 additions and 4 deletions
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6
fs/btrfs/backref.c
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@ -301,11 +301,15 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
goto out;
eb = path->nodes[level];
if (!eb) {
while (!eb) {
if (!level) {
WARN_ON(1);
ret = 1;
goto out;
}
level--;
eb = path->nodes[level];
}
ret = add_all_parents(root, path, parents, level, &ref->key_for_search,
time_seq, ref->wanted_disk_byte,