Btrfs: don't miss inode ref items in BTRFS_IOC_INO_LOOKUP
If the inode ref key was not found and the current leaf slot
was 0 (first item in the leaf) the code would always return
-ENOENT. This was not correct because the desired inode ref
item might be the last item in the previous leaf.
Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index f88eeea..82fb11a 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2013,19 +2013,21 @@
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto out;
+ else if (ret > 0) {
+ ret = btrfs_previous_item(root, path, dirid,
+ BTRFS_INODE_REF_KEY);
+ if (ret < 0)
+ goto out;
+ else if (ret > 0) {
+ ret = -ENOENT;
+ goto out;
+ }
+ }
l = path->nodes[0];
slot = path->slots[0];
- if (ret > 0 && slot > 0)
- slot--;
btrfs_item_key_to_cpu(l, &key, slot);
- if (ret > 0 && (key.objectid != dirid ||
- key.type != BTRFS_INODE_REF_KEY)) {
- ret = -ENOENT;
- goto out;
- }
-
iref = btrfs_item_ptr(l, slot, struct btrfs_inode_ref);
len = btrfs_inode_ref_name_len(l, iref);
ptr -= len + 1;