2 * Copyright (C) 2015 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef ANDROID_VOLD_PRIVATE_VOLUME_H
18 #define ANDROID_VOLD_PRIVATE_VOLUME_H
20 #include "VolumeBase.h"
22 #include <cutils/multiuser.h>
28 * Private storage provided by an encrypted partition.
30 * Given a raw block device, it knows how to wrap it in dm-crypt and
31 * format as ext4/f2fs. EmulatedVolume can be stacked above it.
33 * This volume is designed to behave much like the internal /data
34 * partition, both in layout and function. For example, apps and
35 * private app data can be safely stored on this volume because the
36 * keys are tightly tied to this device.
38 class PrivateVolume : public VolumeBase {
40 PrivateVolume(dev_t device, const std::string& keyRaw);
41 virtual ~PrivateVolume();
44 status_t doCreate() override;
45 status_t doDestroy() override;
46 status_t doMount() override;
47 status_t doUnmount() override;
48 status_t doFormat() override;
50 status_t readMetadata();
53 /* Kernel device of raw, encrypted partition */
55 /* Path to raw, encrypted block device */
56 std::string mRawDevPath;
57 /* Path to decrypted block device */
58 std::string mDmDevPath;
59 /* Path where decrypted device is mounted */
62 /* Encryption key as raw bytes */
69 /* User-visible filesystem label */
72 DISALLOW_COPY_AND_ASSIGN(PrivateVolume);
76 } // namespace android