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//
// Copyright (C) 2020 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 UPDATE_ENGINE_VABC_PARTITION_WRITER_H_
#define UPDATE_ENGINE_VABC_PARTITION_WRITER_H_
#include <memory>
#include <vector>
#include <libsnapshot/snapshot_writer.h>
#include "update_engine/common/cow_operation_convert.h"
#include "update_engine/payload_consumer/install_plan.h"
#include "update_engine/payload_consumer/partition_writer.h"
namespace chromeos_update_engine {
class VABCPartitionWriter final : public PartitionWriter {
public:
using PartitionWriter::PartitionWriter;
[[nodiscard]] bool Init(const InstallPlan* install_plan,
bool source_may_exist,
size_t next_op_index) override;
~VABCPartitionWriter() override;
[[nodiscard]] std::unique_ptr<ExtentWriter> CreateBaseExtentWriter() override;
// Only ZERO and SOURCE_COPY InstallOperations are treated special by VABC
// Partition Writer. These operations correspond to COW_ZERO and COW_COPY. All
// other operations just get converted to COW_REPLACE.
[[nodiscard]] bool PerformZeroOrDiscardOperation(
const InstallOperation& operation) override;
[[nodiscard]] bool PerformSourceCopyOperation(
const InstallOperation& operation, ErrorCode* error) override;
void CheckpointUpdateProgress(size_t next_op_index) override;
static bool WriteAllCowOps(size_t block_size,
const std::vector<CowOperation>& converted,
android::snapshot::ICowWriter* cow_writer,
FileDescriptorPtr source_fd);
[[nodiscard]] bool FinishedInstallOps() override;
private:
std::unique_ptr<android::snapshot::ISnapshotWriter> cow_writer_;
};
} // namespace chromeos_update_engine
#endif
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