82e90de23d
StubVolume is a volume type for ARC++ external storage. Named StubVolume because it is managed from outside Android (not through Android kernel). Previously, StubVolume is a diskless volume. However, as mentioned in jsharkey@ email, a disk is needed for StubVolume to hold "kInternal" (external storage type that is "external" from Android perspective, but is "internal" to the device. For example shared directory from ChromeOS to Android) and "kIndexable" (whether or not a disk should be indexed by MediaStore). The addition of disk means we could expose the createStubVolume API to add a disk flags, which is also introduced in this CL. Both kInternal and kIndexable will be introduced in separate CL. Bug: 132796154 Test: Mount/unmount ARC++ removable device in ChromeOS. Change-Id: I8b77fa1cf50ab38a2892272154dafdb78f079378
131 lines
3.8 KiB
C++
131 lines
3.8 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_DISK_H
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#define ANDROID_VOLD_DISK_H
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#include "StubVolume.h"
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#include "Utils.h"
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#include "VolumeBase.h"
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#include <utils/Errors.h>
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#include <vector>
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namespace android {
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namespace vold {
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class VolumeBase;
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/*
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* Representation of detected physical media.
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*
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* Knows how to create volumes based on the partition tables found, and also
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* how to repartition itself.
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*/
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class Disk {
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public:
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Disk(const std::string& eventPath, dev_t device, const std::string& nickname, int flags);
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virtual ~Disk();
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enum Flags {
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/* Flag that disk is adoptable */
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kAdoptable = 1 << 0,
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/* Flag that disk is considered primary when the user hasn't
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* explicitly picked a primary storage location */
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kDefaultPrimary = 1 << 1,
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/* Flag that disk is SD card */
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kSd = 1 << 2,
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/* Flag that disk is USB disk */
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kUsb = 1 << 3,
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/* Flag that disk is EMMC internal */
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kEmmc = 1 << 4,
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/* Flag that disk is Stub disk, i.e., disk that is managed from outside
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* Android (e.g., ARC++). */
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kStub = 1 << 5,
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};
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const std::string& getId() const { return mId; }
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const std::string& getEventPath() const { return mEventPath; }
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const std::string& getSysPath() const { return mSysPath; }
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const std::string& getDevPath() const { return mDevPath; }
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dev_t getDevice() const { return mDevice; }
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uint64_t getSize() const { return mSize; }
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const std::string& getLabel() const { return mLabel; }
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int getFlags() const { return mFlags; }
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std::shared_ptr<VolumeBase> findVolume(const std::string& id);
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void listVolumes(VolumeBase::Type type, std::list<std::string>& list) const;
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std::vector<std::shared_ptr<VolumeBase>> getVolumes() const;
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status_t create();
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status_t destroy();
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status_t readMetadata();
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status_t readPartitions();
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void initializePartition(std::shared_ptr<StubVolume> vol);
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status_t unmountAll();
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status_t partitionPublic();
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status_t partitionPrivate();
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status_t partitionMixed(int8_t ratio);
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private:
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/* ID that uniquely references this disk */
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std::string mId;
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/* Original event path */
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std::string mEventPath;
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/* Device path under sysfs */
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std::string mSysPath;
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/* Device path under dev */
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std::string mDevPath;
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/* Kernel device representing disk */
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dev_t mDevice;
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/* Size of disk, in bytes */
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uint64_t mSize;
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/* User-visible label, such as manufacturer */
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std::string mLabel;
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/* Current partitions on disk */
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std::vector<std::shared_ptr<VolumeBase>> mVolumes;
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/* Nickname for this disk */
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std::string mNickname;
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/* Flags applicable to this disk */
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int mFlags;
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/* Flag indicating object is created */
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bool mCreated;
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/* Flag that we just partitioned and should format all volumes */
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bool mJustPartitioned;
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void createPublicVolume(dev_t device);
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void createPrivateVolume(dev_t device, const std::string& partGuid);
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void createStubVolume();
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void destroyAllVolumes();
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int getMaxMinors();
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bool isStub() { return mFlags & kStub; }
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DISALLOW_COPY_AND_ASSIGN(Disk);
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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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