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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_VOLD_PRIVATE_VOLUME_H
#define ANDROID_VOLD_PRIVATE_VOLUME_H
#include "VolumeBase.h"
#include <cutils/multiuser.h>
namespace android {
namespace vold {
/*
* Private storage provided by an encrypted partition.
*
* Given a raw block device, it knows how to wrap it in dm-crypt and
* format as ext4/f2fs. EmulatedVolume can be stacked above it.
*
* This volume is designed to behave much like the internal /data
* partition, both in layout and function. For example, apps and
* private app data can be safely stored on this volume because the
* keys are tightly tied to this device.
*/
class PrivateVolume : public VolumeBase {
public:
PrivateVolume(dev_t device, const KeyBuffer& keyRaw);
virtual ~PrivateVolume();
const std::string& getFsType() const { return mFsType; };
const std::string& getRawDevPath() const { return mRawDevPath; };
const std::string& getRawDmDevPath() const { return mDmDevPath; };
const std::string& getFsUuid() const { return mFsUuid; };
dev_t getRawDevice() const { return mRawDevice; };
protected:
status_t doCreate() override;
status_t doDestroy() override;
status_t doMount() override;
void doPostMount() override;
status_t doUnmount() override;
status_t doFormat(const std::string& fsType) override;
status_t readMetadata();
private:
/* Kernel device of raw, encrypted partition */
dev_t mRawDevice;
/* Path to raw, encrypted block device */
std::string mRawDevPath;
/* Path to decrypted block device */
std::string mDmDevPath;
/* Path where decrypted device is mounted */
std::string mPath;
/* Encryption key as raw bytes */
KeyBuffer mKeyRaw;
/* Filesystem type */
std::string mFsType;
/* Filesystem UUID */
std::string mFsUuid;
/* User-visible filesystem label */
std::string mFsLabel;
DISALLOW_COPY_AND_ASSIGN(PrivateVolume);
};
} // namespace vold
} // namespace android
#endif