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 _LOOP_H
18 #define _LOOP_H
19 
20 #include <unistd.h>
21 #include <linux/loop.h>
22 
23 class SocketClient;
24 
25 class Loop {
26 public:
27     static const int LOOP_MAX = 4096;
28 public:
29     static int lookupActive(const char *id, char *buffer, size_t len);
30     static int lookupInfo(const char *loopDevice, struct asec_superblock *sb, unsigned long *nr_sec);
31     static int create(const char *id, const char *loopFile, char *loopDeviceBuffer, size_t len);
32     static int destroyByDevice(const char *loopDevice);
33     static int destroyByFile(const char *loopFile);
34     static int createImageFile(const char *file, unsigned long numSectors);
35     static int resizeImageFile(const char *file, unsigned long numSectors);
36 
37     static int dumpState(SocketClient *c);
38 };
39 
40 #endif
41