ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0);
if (ret < 0)
goto out;
+ if (path->slots[0] == 0) {
+ ret = -ENOENT;
+ goto out;
+ }
BUG_ON(ret == 0);
l = path->nodes[0];
- BUG_ON(path->slots[0] == 0);
slot = path->slots[0] - 1;
btrfs_item_key_to_cpu(l, &found_key, slot);
if (found_key.objectid != objectid) {
memcpy(key, &found_key, sizeof(found_key));
ret = 0;
out:
- btrfs_release_path(path);
btrfs_free_path(path);
return ret;
}
write_extent_buffer(l, item, ptr, sizeof(*item));
btrfs_mark_buffer_dirty(path->nodes[0]);
out:
- btrfs_release_path(path);
btrfs_free_path(path);
return ret;
}
return ret;
}
-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(path);
- btrfs_free_path(path);
- return ret;
-}
-
/*
* add a btrfs_root_ref item. type is either BTRFS_ROOT_REF_KEY
* or BTRFS_ROOT_BACKREF_KEY.