1 /*
2  * Copyright (C) 2008 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef _DEVMAPPER_H
18 #define _DEVMAPPER_H
19 
20 #include <unistd.h>
21 #include <linux/dm-ioctl.h>
22 
23 class SocketClient;
24 
25 class Devmapper {
26 public:
27     static int create(const char *name, const char *loopFile, const char *key,
28                       unsigned long numSectors, char *buffer, size_t len);
29     static int destroy(const char *name);
30     static int lookupActive(const char *name, char *buffer, size_t len);
31     static int dumpState(SocketClient *c);
32 
33 private:
34     static void *_align(void *ptr, unsigned int a);
35     static void ioctlInit(struct dm_ioctl *io, size_t data_size,
36                           const char *name, unsigned flags);
37 };
38 
39 #endif
40