blob: 9b0c04978a5bbe6ec3e47babeb97bc75a9dbb14e [file] [log] [blame]
Jeff Sharkeydeb24052015-03-02 21:01:40 -08001/*
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
24namespace android {
25namespace 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 */
38class EmulatedVolume : public VolumeBase {
39public:
Chih-Hung Hsieha4353672016-08-02 11:41:54 -070040 explicit EmulatedVolume(const std::string& rawPath);
Jeff Sharkey3161fb32015-04-12 16:03:33 -070041 EmulatedVolume(const std::string& rawPath, dev_t device, const std::string& fsUuid);
Jeff Sharkeydeb24052015-03-02 21:01:40 -080042 virtual ~EmulatedVolume();
43
Jeff Sharkey36801cc2015-03-13 16:09:20 -070044protected:
45 status_t doMount() override;
46 status_t doUnmount() override;
Jeff Sharkeydeb24052015-03-02 21:01:40 -080047
48private:
Jeff Sharkeydeb24052015-03-02 21:01:40 -080049 std::string mRawPath;
Jeff Sharkey66270a22015-06-24 11:49:24 -070050 std::string mLabel;
51
52 std::string mFuseDefault;
53 std::string mFuseRead;
54 std::string mFuseWrite;
55
Jeff Sharkeydeb24052015-03-02 21:01:40 -080056 /* PID of FUSE wrapper */
57 pid_t mFusePid;
Jeff Sharkeydeb24052015-03-02 21:01:40 -080058
59 DISALLOW_COPY_AND_ASSIGN(EmulatedVolume);
60};
61
62} // namespace vold
63} // namespace android
64
65#endif