d0640f6358
When formatting volumes, pass along fsType string which can be "auto" to let the volume select the best choice. For now, private volumes assume that MMC devices (like SD cards) are best off using f2fs when both kernel support and tools are present, otherwise fall back to ext4. Use blkid when mounting to pick the right set of tools. Move filesystem utility methods into namespaces and place in separate directory to be more organized. Bug: 20275581 Change-Id: Id5f82d8672dda2e9f68c35b075f28232b0b55ed4
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
/*
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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 std::string& keyRaw);
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virtual ~PrivateVolume();
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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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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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std::string 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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