You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
79 lines
2.4 KiB
79 lines
2.4 KiB
//
|
|
// Copyright (C) 2009 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_PAYLOAD_CONSUMER_EXTENT_WRITER_H_
|
|
#define UPDATE_ENGINE_PAYLOAD_CONSUMER_EXTENT_WRITER_H_
|
|
|
|
#include <memory>
|
|
#include <utility>
|
|
|
|
#include <base/logging.h>
|
|
#include <brillo/secure_blob.h>
|
|
|
|
#include "update_engine/common/utils.h"
|
|
#include "update_engine/payload_consumer/file_descriptor.h"
|
|
#include "update_engine/update_metadata.pb.h"
|
|
|
|
// ExtentWriter is an abstract class which synchronously writes to a given
|
|
// file descriptor at the extents given.
|
|
|
|
namespace chromeos_update_engine {
|
|
|
|
class ExtentWriter {
|
|
public:
|
|
ExtentWriter() = default;
|
|
virtual ~ExtentWriter() = default;
|
|
|
|
// Returns true on success.
|
|
virtual bool Init(const google::protobuf::RepeatedPtrField<Extent>& extents,
|
|
uint32_t block_size) = 0;
|
|
|
|
// Returns true on success.
|
|
virtual bool Write(const void* bytes, size_t count) = 0;
|
|
};
|
|
|
|
// DirectExtentWriter is probably the simplest ExtentWriter implementation.
|
|
// It writes the data directly into the extents.
|
|
|
|
class DirectExtentWriter : public ExtentWriter {
|
|
public:
|
|
explicit DirectExtentWriter(FileDescriptorPtr fd) : fd_(fd) {}
|
|
~DirectExtentWriter() override = default;
|
|
|
|
bool Init(const google::protobuf::RepeatedPtrField<Extent>& extents,
|
|
uint32_t block_size) override {
|
|
block_size_ = block_size;
|
|
extents_ = extents;
|
|
cur_extent_ = extents_.begin();
|
|
return true;
|
|
}
|
|
bool Write(const void* bytes, size_t count) override;
|
|
|
|
private:
|
|
FileDescriptorPtr fd_{nullptr};
|
|
|
|
size_t block_size_{0};
|
|
// Bytes written into |cur_extent_| thus far.
|
|
uint64_t extent_bytes_written_{0};
|
|
google::protobuf::RepeatedPtrField<Extent> extents_;
|
|
// The next call to write should correspond to |cur_extents_|.
|
|
google::protobuf::RepeatedPtrField<Extent>::iterator cur_extent_;
|
|
};
|
|
|
|
} // namespace chromeos_update_engine
|
|
|
|
#endif // UPDATE_ENGINE_PAYLOAD_CONSUMER_EXTENT_WRITER_H_
|