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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
commit | 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 (patch) | |
tree | e5d88d25d870d5dedacb6bbdbe2a966086a0a5cf /src/crimson/net/SocketConnection.h | |
parent | Initial commit. (diff) | |
download | ceph-483eb2f56657e8e7f419ab1a4fab8dce9ade8609.tar.xz ceph-483eb2f56657e8e7f419ab1a4fab8dce9ade8609.zip |
Adding upstream version 14.2.21.upstream/14.2.21upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/crimson/net/SocketConnection.h')
-rw-r--r-- | src/crimson/net/SocketConnection.h | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/src/crimson/net/SocketConnection.h b/src/crimson/net/SocketConnection.h new file mode 100644 index 00000000..62cc77d5 --- /dev/null +++ b/src/crimson/net/SocketConnection.h @@ -0,0 +1,235 @@ +// -*- 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/gate.hh> +#include <seastar/core/reactor.hh> +#include <seastar/core/shared_future.hh> +#include <seastar/core/sharded.hh> + +#include "msg/Policy.h" +#include "Connection.h" +#include "Socket.h" +#include "crimson/thread/Throttle.h" + +class AuthAuthorizer; +class AuthSessionHandler; + +namespace ceph::net { + +using stop_t = seastar::stop_iteration; + +class SocketMessenger; +class SocketConnection; +using SocketConnectionRef = seastar::shared_ptr<SocketConnection>; + +class SocketConnection : public Connection { + SocketMessenger& messenger; + seastar::foreign_ptr<std::unique_ptr<Socket>> socket; + Dispatcher& dispatcher; + seastar::gate pending_dispatch; + + // if acceptor side, socket_port is different from peer_addr.get_port(); + // if connector side, socket_port is different from my_addr.get_port(). + enum class side_t { + none, + acceptor, + connector + }; + side_t side = side_t::none; + uint16_t socket_port = 0; + + enum class state_t { + none, + accepting, + connecting, + open, + standby, + wait, + closing + }; + state_t state = state_t::none; + + /// become valid only when state is state_t::closing + seastar::shared_future<> close_ready; + + /// state for handshake + struct Handshake { + ceph_msg_connect connect; + ceph_msg_connect_reply reply; + std::unique_ptr<AuthAuthorizer> authorizer; + std::chrono::milliseconds backoff; + uint32_t connect_seq = 0; + uint32_t peer_global_seq = 0; + uint32_t global_seq; + seastar::promise<> promise; + } h; + + /// server side of handshake negotiation + seastar::future<stop_t> repeat_handle_connect(); + seastar::future<stop_t> handle_connect_with_existing(SocketConnectionRef existing, + bufferlist&& authorizer_reply); + seastar::future<stop_t> replace_existing(SocketConnectionRef existing, + bufferlist&& authorizer_reply, + bool is_reset_from_peer = false); + seastar::future<stop_t> send_connect_reply(ceph::net::msgr_tag_t tag, + bufferlist&& authorizer_reply = {}); + seastar::future<stop_t> send_connect_reply_ready(ceph::net::msgr_tag_t tag, + bufferlist&& authorizer_reply); + + seastar::future<> handle_keepalive2(); + seastar::future<> handle_keepalive2_ack(); + + bool require_auth_feature() const; + uint32_t get_proto_version(entity_type_t peer_type, bool connec) const; + /// client side of handshake negotiation + seastar::future<stop_t> repeat_connect(); + seastar::future<stop_t> handle_connect_reply(ceph::net::msgr_tag_t tag); + void reset_session(); + + /// state for an incoming message + struct MessageReader { + ceph_msg_header header; + ceph_msg_footer footer; + bufferlist front; + bufferlist middle; + bufferlist data; + } m; + + seastar::future<> maybe_throttle(); + seastar::future<> handle_tags(); + seastar::future<> handle_ack(); + + /// becomes available when handshake completes, and when all previous messages + /// have been sent to the output stream. send() chains new messages as + /// continuations to this future to act as a queue + seastar::future<> send_ready; + + /// encode/write a message + seastar::future<> write_message(MessageRef msg); + + ceph::net::Policy<ceph::thread::Throttle> policy; + uint64_t features; + void set_features(uint64_t new_features) { + features = new_features; + } + + /// 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); + + seastar::future<> read_message(); + + std::unique_ptr<AuthSessionHandler> session_security; + + // messages to be resent after connection gets reset + std::queue<MessageRef> out_q; + // messages sent, but not yet acked by peer + std::queue<MessageRef> sent; + static void discard_up_to(std::queue<MessageRef>*, seq_num_t); + + struct Keepalive { + struct { + const char tag = CEPH_MSGR_TAG_KEEPALIVE2; + ceph_timespec stamp; + } __attribute__((packed)) req; + struct { + const char tag = CEPH_MSGR_TAG_KEEPALIVE2_ACK; + ceph_timespec stamp; + } __attribute__((packed)) ack; + ceph_timespec ack_stamp; + } k; + + seastar::future<> fault(); + + void execute_open(); + + seastar::future<> do_send(MessageRef msg); + seastar::future<> do_keepalive(); + seastar::future<> do_close(); + + public: + SocketConnection(SocketMessenger& messenger, + Dispatcher& dispatcher); + ~SocketConnection(); + + Messenger* get_messenger() const override; + + int get_peer_type() const override { + return peer_type; + } + + seastar::future<bool> is_connected() override; + + seastar::future<> send(MessageRef msg) override; + + seastar::future<> keepalive() override; + + seastar::future<> close() override; + + seastar::shard_id shard_id() const override; + + void print(ostream& out) const override; + + public: + /// 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_type_t& peer_type); + /// start a handshake from the server's perspective, + /// only call when SocketConnection first construct + void start_accept(seastar::foreign_ptr<std::unique_ptr<Socket>>&& socket, + const entity_addr_t& peer_addr); + + /// the number of connections initiated in this session, increment when a + /// new connection is established + uint32_t connect_seq() const { + return h.connect_seq; + } + + /// the client side should connect us with a gseq. it will be reset with + /// the one of exsting connection if it's greater. + uint32_t peer_global_seq() const { + return h.peer_global_seq; + } + seq_num_t rx_seq_num() const { + return in_seq; + } + + /// current state of connection + state_t get_state() const { + return state; + } + bool is_server_side() const { + return policy.server; + } + bool is_lossy() const { + return policy.lossy; + } + + /// move all messages in the sent list back into the queue + void requeue_sent(); + + std::tuple<seq_num_t, std::queue<MessageRef>> get_out_queue() { + return {out_seq, std::move(out_q)}; + } +}; + +} // namespace ceph::net |