Volume.h revision a4886f1f8ed72e24a302a91a0ab18bc54b6f585e 
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 _VOLUME_H
18#define _VOLUME_H
19
20#include <utils/List.h>
21
22class NetlinkEvent;
23class VolumeManager;
24
25class Volume {
26private:
27    int mState;
28
29public:
30    static const int State_Init       = -1;
31    static const int State_NoMedia    = 0;
32    static const int State_Idle       = 1;
33    static const int State_Pending    = 2;
34    static const int State_Checking   = 3;
35    static const int State_Mounted    = 4;
36    static const int State_Unmounting = 5;
37    static const int State_Formatting = 6;
38    static const int State_Shared     = 7;
39    static const int State_SharedMnt  = 8;
40
41    static const char *SECDIR;
42    static const char *SEC_STGDIR;
43    static const char *SEC_STG_SECIMGDIR;
44    static const char *SEC_ASECDIR;
45    static const char *ASECDIR;
46
47    static const char *LOOPDIR;
48
49protected:
50    char *mLabel;
51    char *mMountpoint;
52    VolumeManager *mVm;
53    bool mDebug;
54    int mPartIdx;
55
56    /*
57     * The major/minor tuple of the currently mounted filesystem.
58     */
59    dev_t mCurrentlyMountedKdev;
60
61public:
62    Volume(VolumeManager *vm, const char *label, const char *mount_point);
63    virtual ~Volume();
64
65    int mountVol();
66    int unmountVol(bool force);
67    int formatVol();
68
69    const char *getLabel() { return mLabel; }
70    const char *getMountpoint() { return mMountpoint; }
71    int getState() { return mState; }
72
73    virtual int handleBlockEvent(NetlinkEvent *evt);
74    virtual dev_t getDiskDevice();
75    virtual dev_t getShareDevice();
76    virtual void handleVolumeShared();
77    virtual void handleVolumeUnshared();
78
79    void setDebug(bool enable);
80
81protected:
82    void setState(int state);
83
84    virtual int getDeviceNodes(dev_t *devs, int max) = 0;
85
86    int createDeviceNode(const char *path, int major, int minor);
87
88private:
89    int initializeMbr(const char *deviceNode);
90    bool isMountpointMounted(const char *path);
91    int createBindMounts();
92    int doUnmount(const char *path, bool force);
93    int doMoveMount(const char *src, const char *dst, bool force);
94    void protectFromAutorunStupidity();
95};
96
97typedef android::List<Volume *> VolumeCollection;
98
99#endif
100