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/*
* 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 <memory>
#include <string>
#include <android/gsi/IGsiService.h>
#include <libfiemap_writer/split_fiemap_writer.h>
#include <liblp/builder.h>
namespace android {
namespace gsi {
class GsiService;
class GsiInstaller final {
public:
// Constructor for a new GSI installation.
GsiInstaller(GsiService* service, const GsiInstallParams& params);
// Constructor for re-enabling a previous GSI installation.
GsiInstaller(GsiService* service, const std::string& install_dir);
~GsiInstaller();
// Methods for a clean GSI install.
int StartInstall();
bool CommitGsiChunk(int stream_fd, int64_t bytes);
bool CommitGsiChunk(const void* data, size_t bytes);
int SetGsiBootable(bool one_shot);
// Methods for re-enabling an existing install.
int ReenableGsi(bool one_shot);
// Clean up install state if gsid crashed and restarted.
static void PostInstallCleanup();
// This helper class will redirect writes to either a SplitFiemap or
// device-mapper.
class WriteHelper {
public:
virtual ~WriteHelper(){};
virtual bool Write(const void* data, uint64_t bytes) = 0;
virtual bool Flush() = 0;
WriteHelper() = default;
WriteHelper(const WriteHelper&) = delete;
WriteHelper& operator=(const WriteHelper&) = delete;
WriteHelper& operator=(WriteHelper&&) = delete;
WriteHelper(WriteHelper&&) = delete;
};
const std::string& install_dir() const { return install_dir_; }
uint64_t userdata_size() const { return userdata_size_; }
private:
using MetadataBuilder = android::fs_mgr::MetadataBuilder;
using LpMetadata = android::fs_mgr::LpMetadata;
using SplitFiemap = android::fiemap_writer::SplitFiemap;
// The image file may be larger than the requested size, due to alignment,
// so we must track the requested size as well.
struct Image {
std::unique_ptr<SplitFiemap> writer;
uint64_t actual_size;
};
int PerformSanityChecks();
int PreallocateFiles();
int PreallocateUserdata();
int PreallocateSystem();
int DetermineReadWriteMethod();
bool FormatUserdata();
bool AddPartitionFiemap(MetadataBuilder* builder, android::fs_mgr::Partition* partition,
const Image& image, const std::string& block_device);
std::unique_ptr<LpMetadata> CreateMetadata();
std::unique_ptr<SplitFiemap> CreateFiemapWriter(const std::string& path, uint64_t size,
int* error);
std::unique_ptr<WriteHelper> OpenPartition(const std::string& name);
int GetExistingImage(const LpMetadata& metadata, const std::string& name, Image* image);
bool CreateInstallStatusFile();
bool CreateMetadataFile();
bool SetBootMode(bool one_shot);
std::string GetImagePath(const std::string& name);
GsiService* service_;
std::string install_dir_;
std::string userdata_gsi_path_;
std::string system_gsi_path_;
uint64_t userdata_block_size_ = 0;
uint64_t system_block_size_ = 0;
uint64_t gsi_size_ = 0;
uint64_t userdata_size_ = 0;
bool can_use_devicemapper_ = false;
bool wipe_userdata_ = false;
bool wipe_userdata_on_failure_ = false;
// Remaining data we're waiting to receive for the GSI image.
uint64_t gsi_bytes_written_ = 0;
bool succeeded_ = false;
std::unique_ptr<WriteHelper> system_writer_;
// This is used to track which GSI partitions have been created.
std::map<std::string, Image> partitions_;
std::unique_ptr<LpMetadata> metadata_;
};
} // namespace gsi
} // namespace android
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