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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2017 Red Hat, Inc
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#pragma once
#include <seastar/core/sharded.hh>
#include "msg/Policy.h"
#include "crimson/common/throttle.h"
#include "crimson/net/Connection.h"
#include "crimson/net/Socket.h"
namespace crimson::net {
class Protocol;
class SocketMessenger;
class SocketConnection;
using SocketConnectionRef = seastar::shared_ptr<SocketConnection>;
class SocketConnection : public Connection {
SocketMessenger& messenger;
std::unique_ptr<Protocol> protocol;
ceph::net::Policy<crimson::common::Throttle> policy;
/// the seq num of the last transmitted message
seq_num_t out_seq = 0;
/// the seq num of the last received message
seq_num_t in_seq = 0;
/// update the seq num of last received message
/// @returns true if the @c seq is valid, and @c in_seq is updated,
/// false otherwise.
bool update_rx_seq(seq_num_t seq);
// messages to be resent after connection gets reset
std::deque<MessageRef> out_q;
std::deque<MessageRef> pending_q;
// messages sent, but not yet acked by peer
std::deque<MessageRef> sent;
seastar::shard_id shard_id() const;
public:
SocketConnection(SocketMessenger& messenger,
ChainedDispatchers& dispatchers,
bool is_msgr2);
~SocketConnection() override;
Messenger* get_messenger() const override;
bool is_connected() const override;
#ifdef UNIT_TESTS_BUILT
bool is_closed_clean() const override;
bool is_closed() const override;
bool peer_wins() const override;
#else
bool peer_wins() const;
#endif
seastar::future<> send(MessageRef msg) override;
seastar::future<> keepalive() override;
void mark_down() override;
void print(ostream& out) const override;
/// start a handshake from the client's perspective,
/// only call when SocketConnection first construct
void start_connect(const entity_addr_t& peer_addr,
const entity_name_t& peer_name);
/// start a handshake from the server's perspective,
/// only call when SocketConnection first construct
void start_accept(SocketRef&& socket,
const entity_addr_t& peer_addr);
seastar::future<> close_clean(bool dispatch_reset);
bool is_server_side() const {
return policy.server;
}
bool is_lossy() const {
return policy.lossy;
}
friend class Protocol;
friend class ProtocolV1;
friend class ProtocolV2;
};
} // namespace crimson::net
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