1 /****************************************************************************
2 * drivers/bch/bchdev_register.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 #include <stdbool.h>
25 #include <errno.h>
26 #include <assert.h>
27 #include "bch.h"
28
29 /****************************************************************************
30 * Public Functions
31 ****************************************************************************/
32
33 /****************************************************************************
34 * Name: bchdev_register
35 *
36 * Description:
37 * Setup so that it exports the block driver referenced by 'blkdev' as a
38 * character device 'chardev'
39 *
40 ****************************************************************************/
41
bchdev_register(const char * blkdev,const char * chardev,bool readonly)42 int bchdev_register(const char *blkdev, const char *chardev,
43 bool readonly)
44 {
45 void *handle;
46 int ret;
47
48 /* Setup the BCH lib functions */
49
50 ret = bchlib_setup(blkdev, readonly, &handle);
51 if (ret < 0)
52 {
53 PRINTK("ERROR: bchlib_setup failed: %d\n", -ret);
54 return ret;
55 }
56
57 /* Then setup the character device */
58
59 ret = register_driver(chardev, &bch_fops, 0666, handle);
60 if (ret < 0)
61 {
62 PRINTK("ERROR: register_driver failed: %d\n", -ret);
63 (void)bchlib_teardown(handle);
64 handle = NULL;
65 }
66
67 return ret;
68 }
69