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 FUSE 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); 41 EmulatedVolume(const std::string& rawPath, dev_t device, const std::string& fsUuid); 42 virtual ~EmulatedVolume(); 43 44 protected: 45 status_t doMount() override; 46 status_t doUnmount() override; 47 48 private: 49 std::string mRawPath; 50 std::string mLabel; 51 52 std::string mFuseDefault; 53 std::string mFuseRead; 54 std::string mFuseWrite; 55 56 /* PID of FUSE wrapper */ 57 pid_t mFusePid; 58 59 DISALLOW_COPY_AND_ASSIGN(EmulatedVolume); 60 }; 61 62 } // namespace vold 63 } // namespace android 64 65 #endif 66
