99 lines
3.8 KiB
C++
99 lines
3.8 KiB
C++
//
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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 <map>
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#include <memory>
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#include <string>
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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/extent_map.h"
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#include "update_engine/payload_consumer/install_operation_executor.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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#include "update_engine/payload_generator/extent_ranges.h"
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namespace chromeos_update_engine {
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class VABCPartitionWriter final : public PartitionWriterInterface {
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public:
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VABCPartitionWriter(const PartitionUpdate& partition_update,
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const InstallPlan::Partition& install_part,
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DynamicPartitionControlInterface* dynamic_control,
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size_t block_size);
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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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// 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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[[nodiscard]] bool PerformReplaceOperation(const InstallOperation& operation,
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const void* data,
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size_t count) override;
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[[nodiscard]] bool PerformDiffOperation(const InstallOperation& operation,
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ErrorCode* error,
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const void* data,
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size_t count) override;
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void CheckpointUpdateProgress(size_t next_op_index) override;
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[[nodiscard]] static bool WriteSourceCopyCowOps(
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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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int Close() override;
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// Send merge sequence data to cow writer
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static bool WriteMergeSequence(
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const ::google::protobuf::RepeatedPtrField<CowMergeOperation>& merge_ops,
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android::snapshot::ICowWriter* cow_writer);
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private:
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bool IsXorEnabled() const noexcept { return xor_map_.size() > 0; }
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std::unique_ptr<android::snapshot::ISnapshotWriter> cow_writer_;
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[[nodiscard]] std::unique_ptr<ExtentWriter> CreateBaseExtentWriter();
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const PartitionUpdate& partition_update_;
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const InstallPlan::Partition& install_part_;
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DynamicPartitionControlInterface* const dynamic_control_;
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// Path to source partition
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const std::string source_path_;
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const size_t block_size_;
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InstallOperationExecutor executor_;
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VerifiedSourceFd verified_source_fd_;
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ExtentMap<const CowMergeOperation*, ExtentLess> xor_map_;
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};
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} // namespace chromeos_update_engine
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#endif
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