diff options
Diffstat (limited to 'root-tree.c')
| -rw-r--r-- | root-tree.c | 35 |
1 files changed, 32 insertions, 3 deletions
diff --git a/root-tree.c b/root-tree.c index 934d02ef..ab01a140 100644 --- a/root-tree.c +++ b/root-tree.c @@ -31,12 +31,14 @@ int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, int ret; int slot; + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + search_key.objectid = objectid; search_key.type = BTRFS_ROOT_ITEM_KEY; search_key.offset = (u64)-1; - path = btrfs_alloc_path(); - BUG_ON(!path); ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0); if (ret < 0) goto out; @@ -74,7 +76,9 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root u32 old_len; path = btrfs_alloc_path(); - BUG_ON(!path); + if (!path) + return -ENOMEM; + ret = btrfs_search_slot(trans, root, key, path, 0, 1); if (ret < 0) goto out; @@ -139,6 +143,31 @@ int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root return ret; } +/* drop the root item for 'key' from 'root' */ +int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, + struct btrfs_key *key) +{ + struct btrfs_path *path; + int ret; + + path = btrfs_alloc_path(); + if (!path) + return -ENOMEM; + ret = btrfs_search_slot(trans, root, key, path, -1, 1); + if (ret < 0) + goto out; + + if (ret != 0) { + ret = -ENOENT; + goto out; + } + + ret = btrfs_del_item(trans, root, path); +out: + btrfs_free_path(path); + return ret; +} + /* * add a btrfs_root_ref item. type is either BTRFS_ROOT_REF_KEY * or BTRFS_ROOT_BACKREF_KEY. |