Jeff Sharkey | deb2405 | 2015-03-02 21:01:40 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ANDROID_VOLD_DISK_H |
| 18 | #define ANDROID_VOLD_DISK_H |
| 19 | |
| 20 | #include "Utils.h" |
| 21 | |
| 22 | #include <utils/Errors.h> |
| 23 | |
| 24 | #include <vector> |
| 25 | |
| 26 | namespace android { |
| 27 | namespace vold { |
| 28 | |
| 29 | class VolumeBase; |
| 30 | |
| 31 | // events: |
| 32 | // disk_created 127:4 |
| 33 | // disk_meta 127:4 [size] [label] |
| 34 | // disk_destroyed 127:4 |
| 35 | |
| 36 | // commands: |
| 37 | // disk partition_public 127:4 |
| 38 | // disk partition_private 127:4 |
| 39 | // disk partition_mixed 127:4 50 |
| 40 | |
| 41 | /* |
| 42 | * Representation of detected physical media. |
| 43 | * |
| 44 | * Knows how to create volumes based on the partition tables found, and also |
| 45 | * how to repartition itself. |
| 46 | */ |
| 47 | class Disk { |
| 48 | public: |
| 49 | Disk(const std::string& eventPath, dev_t device); |
| 50 | virtual ~Disk(); |
| 51 | |
| 52 | const std::string& getId() { return mId; } |
| 53 | const std::string& getSysPath() { return mSysPath; } |
| 54 | const std::string& getDevPath() { return mDevPath; } |
| 55 | dev_t getDevice() { return mDevice; } |
| 56 | uint64_t getSize() { return mSize; } |
| 57 | const std::string& getLabel() { return mLabel; } |
| 58 | |
| 59 | std::shared_ptr<VolumeBase> findVolume(const std::string& id); |
| 60 | |
| 61 | status_t readMetadata(); |
| 62 | status_t readPartitions(); |
| 63 | |
| 64 | status_t partitionPublic(); |
| 65 | status_t partitionPrivate(); |
| 66 | status_t partitionMixed(int8_t ratio); |
| 67 | |
| 68 | private: |
| 69 | /* ID that uniquely references this disk */ |
| 70 | std::string mId; |
| 71 | /* Device path under sysfs */ |
| 72 | std::string mSysPath; |
| 73 | /* Device path under dev */ |
| 74 | std::string mDevPath; |
| 75 | /* Kernel device representing disk */ |
| 76 | dev_t mDevice; |
| 77 | /* Size of disk, in bytes */ |
| 78 | uint64_t mSize; |
| 79 | /* User-visible label, such as manufacturer */ |
| 80 | std::string mLabel; |
| 81 | /* Current partitions on disk */ |
| 82 | std::vector<std::shared_ptr<VolumeBase>> mParts; |
| 83 | |
| 84 | int getMaxMinors(); |
| 85 | |
| 86 | DISALLOW_COPY_AND_ASSIGN(Disk); |
| 87 | }; |
| 88 | |
| 89 | } // namespace vold |
| 90 | } // namespace android |
| 91 | |
| 92 | #endif |