fs/btrfs/orphan.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Copyright (C) 2008 Red Hat.  All rights reserved.
0004  */
0005
0006 #include "ctree.h"
0007 #include "disk-io.h"
0008
0009 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
0010                  struct btrfs_root *root, u64 offset)
0011 {
0012     struct btrfs_path *path;
0013     struct btrfs_key key;
0014     int ret = 0;
0015
0016     key.objectid = BTRFS_ORPHAN_OBJECTID;
0017     key.type = BTRFS_ORPHAN_ITEM_KEY;
0018     key.offset = offset;
0019
0020     path = btrfs_alloc_path();
0021     if (!path)
0022         return -ENOMEM;
0023
0024     ret = btrfs_insert_empty_item(trans, root, path, &key, 0);
0025
0026     btrfs_free_path(path);
0027     return ret;
0028 }
0029
0030 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans,
0031               struct btrfs_root *root, u64 offset)
0032 {
0033     struct btrfs_path *path;
0034     struct btrfs_key key;
0035     int ret = 0;
0036
0037     key.objectid = BTRFS_ORPHAN_OBJECTID;
0038     key.type = BTRFS_ORPHAN_ITEM_KEY;
0039     key.offset = offset;
0040
0041     path = btrfs_alloc_path();
0042     if (!path)
0043         return -ENOMEM;
0044
0045     ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
0046     if (ret < 0)
0047         goto out;
0048     if (ret) { /* JDM: Really? */
0049         ret = -ENOENT;
0050         goto out;
0051     }
0052
0053     ret = btrfs_del_item(trans, root, path);
0054
0055 out:
0056     btrfs_free_path(path);
0057     return ret;
0058 }