-int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root,
- struct btrfs_key *key)
-{
- struct btrfs_path *path;
- int ret;
- u32 refs;
- struct btrfs_root_item *ri;
- struct extent_buffer *leaf;
-
- path = btrfs_alloc_path();
- BUG_ON(!path);
- ret = btrfs_search_slot(trans, root, key, path, -1, 1);
- if (ret < 0)
- goto out;
- BUG_ON(ret != 0);
- leaf = path->nodes[0];
- ri = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_root_item);
-
- refs = btrfs_disk_root_refs(leaf, ri);
- BUG_ON(refs != 0);
- ret = btrfs_del_item(trans, root, path);
-out:
- btrfs_release_path(root, path);
- btrfs_free_path(path);
- return ret;
-}
-