61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
//
|
|
// Copyright (C) 2021 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_BLOCK_EXTENT_WRITER_H_
|
|
#define UPDATE_ENGINE_BLOCK_EXTENT_WRITER_H_
|
|
|
|
#include <cstdint>
|
|
#include <vector>
|
|
|
|
#include "update_engine/payload_consumer/extent_writer.h"
|
|
#include "update_engine/update_metadata.pb.h"
|
|
|
|
namespace chromeos_update_engine {
|
|
|
|
// Cache data upto size of one extent before writing.
|
|
class BlockExtentWriter : public chromeos_update_engine::ExtentWriter {
|
|
public:
|
|
BlockExtentWriter() = default;
|
|
~BlockExtentWriter() = default;
|
|
// Returns true on success.
|
|
bool Init(const google::protobuf::RepeatedPtrField<Extent>& extents,
|
|
uint32_t block_size) override;
|
|
// Returns true on success.
|
|
bool Write(const void* bytes, size_t count) final;
|
|
// Write data for 1 extent. |bytes| will be a pointer which points to data of
|
|
// size |extent.num_blocks()*block_size|. |extent| is the current extent we
|
|
// are writing to.
|
|
virtual bool WriteExtent(const void* bytes,
|
|
const Extent& extent,
|
|
size_t block_size) = 0;
|
|
size_t BlockSize() const { return block_size_; }
|
|
|
|
private:
|
|
bool NextExtent();
|
|
[[nodiscard]] size_t ConsumeWithBuffer(const uint8_t* bytes, size_t count);
|
|
// It's a non-owning pointer, because PartitionWriter owns the CowWruter. This
|
|
// allows us to use a single instance of CowWriter for all operations applied
|
|
// to the same partition.
|
|
google::protobuf::RepeatedPtrField<Extent> extents_;
|
|
size_t cur_extent_idx_;
|
|
std::vector<uint8_t> buffer_;
|
|
size_t block_size_;
|
|
};
|
|
|
|
} // namespace chromeos_update_engine
|
|
|
|
#endif
|