path: root/Disk.h (plain)
blob: a623a62a86754cf0e9256bc783b979bff14ec0a2

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	#include "VolumeBase.h"
22
23	#include <utils/Errors.h>
24	#include <sysutils/NetlinkEvent.h>
25
26	#include <vector>
27
28	namespace android {
29	namespace droidvold {
30
31	class VolumeBase;
32
33	/*
34	* Representation of detected physical media.
35	*
36	* Knows how to create volumes based on the partition tables found, and also
37	* how to repartition itself.
38	*/
39	class Disk {
40	public:
41	Disk(const std::string& eventPath, dev_t device, const std::string& nickname,
42	const std::string& eventName, int flags);
43	virtual ~Disk();
44
45	enum Flags {
46	/* Flag that disk is adoptable */
47	kAdoptable = 1 << 0,
48	/* Flag that disk is considered primary when the user hasn't
49	* explicitly picked a primary storage location */
50	kDefaultPrimary = 1 << 1,
51	/* Flag that disk is SD card */
52	kSd = 1 << 2,
53	/* Flag that disk is USB disk */
54	kUsb = 1 << 3,
55	/* Flag that disk is EMMC internal */
56	kEmmc = 1 << 4,
57	};
58
59	const std::string& getId() { return mId; }
60	const std::string& getEventPath() { return mEventPath; }
61	const std::string& getSysPath() { return mSysPath; }
62	const std::string& getDevPath() { return mDevPath; }
63	dev_t getDevice() { return mDevice; }
64	uint64_t getSize() { return mSize; }
65	const std::string& getLabel() { return mLabel; }
66	int getFlags() { return mFlags; }
67
68	std::shared_ptr<VolumeBase> findVolume(const std::string& id);
69	std::shared_ptr<VolumeBase> findVolumeByPath(const std::string& path);
70
71	void listVolumes(VolumeBase::Type type, std::list<std::string>& list);
72
73	status_t create();
74	status_t destroy();
75
76	status_t readDiskMetadata();
77	status_t readPartitions();
78
79	status_t unmountAll();
80
81	bool isSrdiskMounted();
82	void notifyEvent(int msg);
83	void notifyEvent(int msg, const std::string& value);
84	void destroyAllVolumes();
85
86	void handleBlockEvent(NetlinkEvent *evt);
87	status_t reset();
88
89	private:
90	/* ID that uniquely references this disk */
91	std::string mId;
92	/* Original event path */
93	std::string mEventPath;
94	/* Device path under sysfs */
95	std::string mSysPath;
96	/* Device path under dev */
97	std::string mDevPath;
98
99	std::string mDevName;
100	/* Kernel device representing disk */
101	dev_t mDevice;
102	/* Size of disk, in bytes */
103	uint64_t mSize;
104	/* User-visible label, such as manufacturer */
105	std::string mLabel;
106	/* Current partitions on disk */
107	std::vector<std::shared_ptr<VolumeBase>> mVolumes;
108	/* Nickname for this disk */
109	std::string mNickname;
110	/* Flags applicable to this disk */
111	int mFlags;
112	/* Flag indicating object is created */
113	bool mCreated;
114	/* Flag that we just partitioned and should format all volumes */
115	bool mJustPartitioned;
116	/* Flag indicating is srdisk or not */
117	bool mSrdisk;
118
119	std::vector<int> mPartNo;
120
121	void createPublicVolume(const std::string& partDevName,
122	const bool isPhysical, int part);
123	void createPrivateVolume(dev_t device, const std::string& partGuid);
124	void handleJustPublicPhysicalDevice(const std::string& physicalDevName);
125	void getPhysicalDev(dev_t &device, const std:: string& sysPath, int part);
126
127	int getMaxMinors();
128
129	DISALLOW_COPY_AND_ASSIGN(Disk);
130	};
131
132	} // namespace vold
133	} // namespace android
134
135	#endif
136