1 /****************************************************************************
2 * fs/driver/fs_unregisterdriver.c
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership. The
7 * ASF licenses this file to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance with the
9 * License. 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, WITHOUT
15 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
16 * License for the specific language governing permissions and limitations
17 * 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
unregister_driver(const char * path)43 int 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