1 /* 2 * Copyright (C) 2015 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 ANDROID_VOLD_EMULATED_VOLUME_H 18 #define ANDROID_VOLD_EMULATED_VOLUME_H 19 20 #include "VolumeBase.h" 21 22 #include <cutils/multiuser.h> 23 24 namespace android { 25 namespace vold { 26 27 /* 28 * Shared storage emulated on top of private storage. 29 * 30 * Knows how to spawn a sdcardfs daemon to synthesize permissions. ObbVolume 31 * can be stacked above it. 32 * 33 * This volume is always multi-user aware, but is only binds itself to 34 * users when its primary storage. This volume should never be presented 35 * as secondary storage, since we're strongly encouraging developers to 36 * store data local to their app. 37 */ 38 class EmulatedVolume : public VolumeBase { 39 public: 40 explicit EmulatedVolume(const std::string& rawPath, int userId); 41 EmulatedVolume(const std::string& rawPath, dev_t device, const std::string& fsUuid, int userId); 42 virtual ~EmulatedVolume(); 43 std::string getRootPath() const override; isFuseMounted()44 bool isFuseMounted() const { return mFuseMounted; } 45 46 protected: 47 status_t doMount() override; 48 status_t doUnmount() override; 49 50 private: 51 status_t unmountSdcardFs(); 52 status_t mountFuseBindMounts(); 53 status_t unmountFuseBindMounts(); 54 55 std::string getLabel(); 56 std::string mRawPath; 57 std::string mLabel; 58 59 std::string mSdcardFsDefault; 60 std::string mSdcardFsRead; 61 std::string mSdcardFsWrite; 62 std::string mSdcardFsFull; 63 64 /* Whether we mounted FUSE for this volume */ 65 bool mFuseMounted; 66 67 /* Whether to use sdcardfs for this volume */ 68 bool mUseSdcardFs; 69 70 /* Whether to use app data isolation is enabled tor this volume */ 71 bool mAppDataIsolationEnabled; 72 73 DISALLOW_COPY_AND_ASSIGN(EmulatedVolume); 74 }; 75 76 } // namespace vold 77 } // namespace android 78 79 #endif 80