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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_DISK_H
#define ANDROID_VOLD_DISK_H
#include "Utils.h"
#include <utils/Errors.h>
#include <mutex>
#include <vector>
namespace android {
namespace vold {
class VolumeBase;
/*
* Representation of detected physical media.
*
* Knows how to create volumes based on the partition tables found, and also
* how to repartition itself.
*/
class Disk {
public:
Disk(const std::string& eventPath, dev_t device, const std::string& nickname, int flags);
virtual ~Disk();
enum Flags {
/* Flag that disk is adoptable */
kAdoptable = 1 << 0,
/* Flag that disk is considered primary when the user hasn't
* explicitly picked a primary storage location */
kDefaultPrimary = 1 << 1,
/* Flag that disk is SD card */
kSd = 1 << 2,
/* Flag that disk is USB disk */
kUsb = 1 << 3,
};
const std::string& getId() { return mId; }
const std::string& getEventPath() { return mEventPath; }
const std::string& getSysPath() { return mSysPath; }
const std::string& getDevPath() { return mDevPath; }
dev_t getDevice() { return mDevice; }
uint64_t getSize() { return mSize; }
const std::string& getLabel() { return mLabel; }
int getFlags() { return mFlags; }
std::shared_ptr<VolumeBase> findVolume(const std::string& id);
status_t create();
status_t destroy();
status_t readMetadata();
status_t readPartitions();
status_t unmountAll();
status_t partitionPublic();
status_t partitionPrivate();
status_t partitionMixed(int8_t ratio);
void notifyEvent(int msg);
void notifyEvent(int msg, const std::string& value);
private:
/* ID that uniquely references this disk */
std::string mId;
/* Original event path */
std::string mEventPath;
/* Device path under sysfs */
std::string mSysPath;
/* Device path under dev */
std::string mDevPath;
/* Kernel device representing disk */
dev_t mDevice;
/* Size of disk, in bytes */
uint64_t mSize;
/* User-visible label, such as manufacturer */
std::string mLabel;
/* Current partitions on disk */
std::vector<std::shared_ptr<VolumeBase>> mVolumes;
/* Nickname for this disk */
std::string mNickname;
/* Flags applicable to this disk */
int mFlags;
/* Flag indicating object is created */
bool mCreated;
/* Lock held while partitioning */
std::mutex mLock;
/* Flag that we just partitioned and should format all volumes */
bool mJustPartitioned;
void createPublicVolume(dev_t device);
void createPrivateVolume(dev_t device, const std::string& partGuid);
void destroyAllVolumes();
int getMaxMinors();
DISALLOW_COPY_AND_ASSIGN(Disk);
};
} // namespace vold
} // namespace android
#endif