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