1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/*
* Copyright (C) 2019 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.
*/
#pragma once
#include <stdint.h>
#include <sys/mman.h>
#include <memory>
#include <string>
#include <android-base/unique_fd.h>
#include <android/gsi/IGsiService.h>
#include <android/gsi/MappedImage.h>
#include <libfiemap/image_manager.h>
#include <liblp/builder.h>
namespace android {
namespace gsi {
class GsiService;
class PartitionInstaller final {
using ImageManager = android::fiemap::ImageManager;
using MappedDevice = android::fiemap::MappedDevice;
public:
// Constructor for a new GSI installation.
PartitionInstaller(GsiService* service, const std::string& installDir, const std::string& name,
const std::string& active_dsu, int64_t size, bool read_only);
~PartitionInstaller();
// Methods for a clean GSI install.
int StartInstall();
bool CommitGsiChunk(int stream_fd, int64_t bytes);
bool CommitGsiChunk(const void* data, size_t bytes);
bool MapAshmem(int fd, size_t size);
bool CommitGsiChunk(size_t bytes);
int GetPartitionFd();
static int WipeWritable(const std::string& active_dsu, const std::string& install_dir,
const std::string& name);
// Finish a partition installation and release resources.
// If the installation is incomplete or corrupted, the backing image would
// be cleaned up and an error code is returned.
// No method other than FinishInstall() and ~PartitionInstaller() should be
// called after calling this method.
// This method is also called by the destructor to free up resources.
int FinishInstall();
const std::string& install_dir() const { return install_dir_; }
private:
int PerformSanityChecks();
int Preallocate();
bool Format();
bool CreateImage(const std::string& name, uint64_t size);
std::unique_ptr<MappedDevice> OpenPartition(const std::string& name);
int CheckInstallState();
static const std::string GetBackingFile(std::string name);
bool IsFinishedWriting();
bool IsAshmemMapped();
void UnmapAshmem();
GsiService* service_;
std::string install_dir_;
std::string name_;
std::string active_dsu_;
std::unique_ptr<ImageManager> images_;
uint64_t size_ = 0;
bool readOnly_;
// Remaining data we're waiting to receive for the GSI image.
uint64_t gsi_bytes_written_ = 0;
uint64_t ashmem_size_ = -1;
void* ashmem_data_ = MAP_FAILED;
bool finished_ = false;
int finished_status_ = 0;
std::unique_ptr<MappedDevice> system_device_;
};
} // namespace gsi
} // namespace android
|
