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 _VOLUMEMANAGER_H 18 #define _VOLUMEMANAGER_H 19 20 #include <pthread.h> 21 22 #include <utils/List.h> 23 #include <sysutils/SocketListener.h> 24 25 #include "Volume.h" 26 27 /* The length of an MD5 hash when encoded into ASCII hex characters */ 28 #define MD5_ASCII_LENGTH_PLUS_NULL ((MD5_DIGEST_LENGTH*2)+1) 29 30 typedef enum { ASEC, OBB } container_type_t; 31 32 class ContainerData { 33 public: ContainerData(char * _id,container_type_t _type)34 ContainerData(char* _id, container_type_t _type) 35 : id(_id) 36 , type(_type) 37 {} 38 ~ContainerData()39 ~ContainerData() { 40 if (id != NULL) { 41 free(id); 42 id = NULL; 43 } 44 } 45 46 char *id; 47 container_type_t type; 48 }; 49 50 typedef android::List<ContainerData*> AsecIdCollection; 51 52 class VolumeManager { 53 private: 54 static VolumeManager *sInstance; 55 56 private: 57 SocketListener *mBroadcaster; 58 59 VolumeCollection *mVolumes; 60 AsecIdCollection *mActiveContainers; 61 bool mUsbMassStorageEnabled; 62 bool mUsbConnected; 63 bool mDebug; 64 65 // for adjusting /proc/sys/vm/dirty_ratio when UMS is active 66 int mUmsSharingCount; 67 int mSavedDirtyRatio; 68 int mUmsDirtyRatio; 69 70 public: 71 virtual ~VolumeManager(); 72 73 int start(); 74 int stop(); 75 76 void handleBlockEvent(NetlinkEvent *evt); 77 void handleSwitchEvent(NetlinkEvent *evt); 78 void handleUsbCompositeEvent(NetlinkEvent *evt); 79 80 int addVolume(Volume *v); 81 82 int listVolumes(SocketClient *cli); 83 int mountVolume(const char *label); 84 int unmountVolume(const char *label, bool force); 85 int shareVolume(const char *label, const char *method); 86 int unshareVolume(const char *label, const char *method); 87 int shareAvailable(const char *method, bool *avail); 88 int shareEnabled(const char *path, const char *method, bool *enabled); 89 int simulate(const char *cmd, const char *arg); 90 int formatVolume(const char *label); 91 92 /* ASEC */ 93 int createAsec(const char *id, unsigned numSectors, const char *fstype, 94 const char *key, int ownerUid); 95 int finalizeAsec(const char *id); 96 int destroyAsec(const char *id, bool force); 97 int mountAsec(const char *id, const char *key, int ownerUid); 98 int unmountAsec(const char *id, bool force); 99 int renameAsec(const char *id1, const char *id2); 100 int getAsecMountPath(const char *id, char *buffer, int maxlen); 101 102 /* Loopback images */ 103 int listMountedObbs(SocketClient* cli); 104 int mountObb(const char *fileName, const char *key, int ownerUid); 105 int unmountObb(const char *fileName, bool force); 106 int getObbMountPath(const char *id, char *buffer, int maxlen); 107 108 /* Shared between ASEC and Loopback images */ 109 int unmountLoopImage(const char *containerId, const char *loopId, 110 const char *fileName, const char *mountPoint, bool force); 111 112 void setDebug(bool enable); 113 114 // XXX: Post froyo this should be moved and cleaned up 115 int cleanupAsec(Volume *v, bool force); 116 setBroadcaster(SocketListener * sl)117 void setBroadcaster(SocketListener *sl) { mBroadcaster = sl; } getBroadcaster()118 SocketListener *getBroadcaster() { return mBroadcaster; } 119 120 static VolumeManager *Instance(); 121 122 static char *asecHash(const char *id, char *buffer, size_t len); 123 124 private: 125 VolumeManager(); 126 void readInitialState(); 127 Volume *lookupVolume(const char *label); 128 bool isMountpointMounted(const char *mp); 129 massStorageAvailable()130 inline bool massStorageAvailable() const { return mUsbMassStorageEnabled && mUsbConnected; } 131 void notifyUmsAvailable(bool available); 132 }; 133 #endif 134