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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_LIBRBD_MIGRATION_FILE_STREAM_H
#define CEPH_LIBRBD_MIGRATION_FILE_STREAM_H
#include "include/int_types.h"
#include "librbd/migration/StreamInterface.h"
#include <boost/asio/io_context.hpp>
#include <boost/asio/strand.hpp>
#include <boost/asio/posix/basic_stream_descriptor.hpp>
#include <json_spirit/json_spirit.h>
#include <memory>
#include <string>
struct Context;
namespace librbd {
struct AsioEngine;
struct ImageCtx;
namespace migration {
template <typename ImageCtxT>
class FileStream : public StreamInterface {
public:
static FileStream* create(ImageCtxT* image_ctx,
const json_spirit::mObject& json_object) {
return new FileStream(image_ctx, json_object);
}
FileStream(ImageCtxT* image_ctx, const json_spirit::mObject& json_object);
~FileStream() override;
FileStream(const FileStream&) = delete;
FileStream& operator=(const FileStream&) = delete;
void open(Context* on_finish) override;
void close(Context* on_finish) override;
void get_size(uint64_t* size, Context* on_finish) override;
void read(io::Extents&& byte_extents, bufferlist* data,
Context* on_finish) override;
private:
CephContext* m_cct;
std::shared_ptr<AsioEngine> m_asio_engine;
json_spirit::mObject m_json_object;
boost::asio::strand<boost::asio::io_context::executor_type> m_strand;
#ifdef BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR
std::optional<boost::asio::posix::stream_descriptor> m_stream_descriptor;
struct ReadRequest;
#endif // BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR
int m_file_no = -1;
};
} // namespace migration
} // namespace librbd
extern template class librbd::migration::FileStream<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_MIGRATION_FILE_STREAM_H
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