1/****************************************************************************
2 * fs/driver/fs_unregisterdriver.c
3 *
4 * Copyright (c) 2023 Huawei Device Co., Ltd. All rights reserved.
5 * Based on NuttX originally from nuttx source (nuttx/fs/ and nuttx/drivers/)
6 *
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 *     http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 *
19 ****************************************************************************/
20
21/****************************************************************************
22 * Included Files
23 ****************************************************************************/
24
25#include "vfs_config.h"
26#include "fs/driver.h"
27#include "vnode.h"
28#include "string.h"
29#include "errno.h"
30
31/****************************************************************************
32 * Public Functions
33 ****************************************************************************/
34
35/****************************************************************************
36 * Name: unregister_driver
37 *
38 * Description:
39 *   Remove the character driver vnode at 'path' from the pseudo-file system
40 *
41 ****************************************************************************/
42
43int unregister_driver(const char *path)
44{
45  struct Vnode *vnode = NULL;
46  int ret;
47  if (path == NULL)
48    {
49      return -EINVAL;
50    }
51  VnodeHold();
52  ret = VnodeLookup(path, &vnode, V_DUMMY);
53  if (ret != OK)
54    {
55      VnodeDrop();
56      return ret;
57    }
58  if (vnode->type != VNODE_TYPE_CHR && vnode->type != VNODE_TYPE_BLK)
59    {
60      VnodeDrop();
61      return -EPERM;
62    }
63  ret = VnodeFree(vnode);
64  VnodeDrop();
65
66  return ret;
67}
68