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64 lines
2.3 KiB
64 lines
2.3 KiB
4 months ago
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// Copyright (C) 2020 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#ifndef UPDATE_ENGINE_VABC_PARTITION_WRITER_H_
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#define UPDATE_ENGINE_VABC_PARTITION_WRITER_H_
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#include <memory>
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#include <vector>
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#include <libsnapshot/snapshot_writer.h>
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#include "update_engine/common/cow_operation_convert.h"
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#include "update_engine/payload_consumer/install_plan.h"
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#include "update_engine/payload_consumer/partition_writer.h"
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namespace chromeos_update_engine {
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class VABCPartitionWriter final : public PartitionWriter {
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public:
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using PartitionWriter::PartitionWriter;
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[[nodiscard]] bool Init(const InstallPlan* install_plan,
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bool source_may_exist,
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size_t next_op_index) override;
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~VABCPartitionWriter() override;
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[[nodiscard]] std::unique_ptr<ExtentWriter> CreateBaseExtentWriter() override;
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// Only ZERO and SOURCE_COPY InstallOperations are treated special by VABC
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// Partition Writer. These operations correspond to COW_ZERO and COW_COPY. All
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// other operations just get converted to COW_REPLACE.
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[[nodiscard]] bool PerformZeroOrDiscardOperation(
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const InstallOperation& operation) override;
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[[nodiscard]] bool PerformSourceCopyOperation(
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const InstallOperation& operation, ErrorCode* error) override;
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void CheckpointUpdateProgress(size_t next_op_index) override;
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static bool WriteAllCowOps(size_t block_size,
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const std::vector<CowOperation>& converted,
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android::snapshot::ICowWriter* cow_writer,
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FileDescriptorPtr source_fd);
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[[nodiscard]] bool FinishedInstallOps() override;
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private:
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std::unique_ptr<android::snapshot::ISnapshotWriter> cow_writer_;
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};
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} // namespace chromeos_update_engine
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#endif
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