Volume.h revision 3bb6020e461e8872e8df0775cba6eb32e06b93ec
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 47protected: 48 char *mLabel; 49 char *mMountpoint; 50 VolumeManager *mVm; 51 52 /* 53 * The major/minor tuple of the currently mounted filesystem. 54 */ 55 dev_t mCurrentlyMountedKdev; 56 57public: 58 Volume(VolumeManager *vm, const char *label, const char *mount_point); 59 virtual ~Volume(); 60 61 int mountVol(); 62 int unmountVol(bool force); 63 int formatVol(); 64 65 const char *getLabel() { return mLabel; } 66 const char *getMountpoint() { return mMountpoint; } 67 int getState() { return mState; } 68 69 virtual int handleBlockEvent(NetlinkEvent *evt); 70 virtual dev_t getDiskDevice(); 71 virtual void handleVolumeShared(); 72 virtual void handleVolumeUnshared(); 73 74protected: 75 void setState(int state); 76 77 virtual int getDeviceNodes(dev_t *devs, int max) = 0; 78 79 int createDeviceNode(const char *path, int major, int minor); 80 81private: 82 int initializeMbr(const char *deviceNode); 83 bool isMountpointMounted(const char *path); 84 int createBindMounts(); 85 int doUnmount(const char *path, bool force); 86 int doMoveMount(const char *src, const char *dst, bool force); 87}; 88 89typedef android::List<Volume *> VolumeCollection; 90 91#endif 92