Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 328 insertions, 0 deletions

diff --git a/src/crimson/net/ProtocolV2.h b/src/crimson/net/ProtocolV2.h
new file mode 100644
index 000000000..dd7a1e703
--- /dev/null
+++ b/src/crimson/net/ProtocolV2.h
@@ -0,0 +1,328 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#pragma once
+
+#include <seastar/core/shared_future.hh>
+#include <seastar/core/sleep.hh>
+
+#include "io_handler.h"
+
+namespace crimson::net {
+
+class ProtocolV2 final : public HandshakeListener {
+  using AuthConnectionMetaRef = seastar::lw_shared_ptr<AuthConnectionMeta>;
+
+public:
+  ProtocolV2(SocketConnection &,
+             IOHandler &);
+
+  ~ProtocolV2() final;
+
+  ProtocolV2(const ProtocolV2 &) = delete;
+  ProtocolV2(ProtocolV2 &&) = delete;
+  ProtocolV2 &operator=(const ProtocolV2 &) = delete;
+  ProtocolV2 &operator=(ProtocolV2 &&) = delete;
+
+/**
+ * as HandshakeListener
+ */
+private:
+  seastar::future<> notify_out(
+      crosscore_t::seq_t cc_seq) final;
+
+  seastar::future<> notify_out_fault(
+      crosscore_t::seq_t cc_seq,
+      const char *where,
+      std::exception_ptr,
+      io_handler_state) final;
+
+  seastar::future<> notify_mark_down(
+      crosscore_t::seq_t cc_seq) final;
+
+/*
+* as ProtocolV2 to be called by SocketConnection
+*/
+public:
+  void start_connect(const entity_addr_t& peer_addr,
+                     const entity_name_t& peer_name);
+
+  void start_accept(SocketFRef&& socket,
+                    const entity_addr_t& peer_addr);
+
+  seastar::future<> close_clean_yielded();
+
+#ifdef UNIT_TESTS_BUILT
+  bool is_ready() const {
+    return state == state_t::READY;
+  }
+
+  bool is_standby() const {
+    return state == state_t::STANDBY;
+  }
+
+  bool is_closed_clean() const {
+    return closed_clean;
+  }
+
+  bool is_closed() const {
+    return state == state_t::CLOSING;
+  }
+
+#endif
+private:
+  using io_state_t = IOHandler::io_state_t;
+
+  seastar::future<> wait_switch_io_shard() {
+    if (pr_switch_io_shard.has_value()) {
+      return pr_switch_io_shard->get_shared_future();
+    } else {
+      return seastar::now();
+    }
+  }
+
+  seastar::future<> wait_exit_io() {
+    if (pr_exit_io.has_value()) {
+      return pr_exit_io->get_shared_future();
+    } else {
+      assert(!need_exit_io);
+      return seastar::now();
+    }
+  }
+
+  enum class state_t {
+    NONE = 0,
+    ACCEPTING,
+    SERVER_WAIT,
+    ESTABLISHING,
+    CONNECTING,
+    READY,
+    STANDBY,
+    WAIT,
+    REPLACING,
+    CLOSING
+  };
+
+  static const char *get_state_name(state_t state) {
+    const char *const statenames[] = {"NONE",
+                                      "ACCEPTING",
+                                      "SERVER_WAIT",
+                                      "ESTABLISHING",
+                                      "CONNECTING",
+                                      "READY",
+                                      "STANDBY",
+                                      "WAIT",
+                                      "REPLACING",
+                                      "CLOSING"};
+    return statenames[static_cast<int>(state)];
+  }
+
+  void trigger_state_phase1(state_t new_state);
+
+  void trigger_state_phase2(state_t new_state, io_state_t new_io_state);
+
+  void trigger_state(state_t new_state, io_state_t new_io_state) {
+    ceph_assert_always(!pr_switch_io_shard.has_value());
+    trigger_state_phase1(new_state);
+    trigger_state_phase2(new_state, new_io_state);
+  }
+
+  template <typename Func, typename T>
+  void gated_execute(const char *what, T &who, Func &&func) {
+    gate.dispatch_in_background(what, who, [this, &who, &func] {
+      if (!execution_done.available()) {
+        // discard the unready future
+        gate.dispatch_in_background(
+          "gated_execute_abandon",
+          who,
+          [fut=std::move(execution_done)]() mutable {
+            return std::move(fut);
+          }
+        );
+      }
+      seastar::promise<> pr;
+      execution_done = pr.get_future();
+      return seastar::futurize_invoke(std::forward<Func>(func)
+      ).finally([pr=std::move(pr)]() mutable {
+        pr.set_value();
+      });
+    });
+  }
+
+  void fault(state_t expected_state,
+             const char *where,
+             std::exception_ptr eptr);
+
+  void reset_session(bool is_full);
+  seastar::future<std::tuple<entity_type_t, entity_addr_t>>
+  banner_exchange(bool is_connect);
+
+  enum class next_step_t {
+    ready,
+    wait,
+    none,       // protocol should have been aborted or failed
+  };
+
+  // CONNECTING (client)
+  seastar::future<> handle_auth_reply();
+  inline seastar::future<> client_auth() {
+    std::vector<uint32_t> empty;
+    return client_auth(empty);
+  }
+  seastar::future<> client_auth(std::vector<uint32_t> &allowed_methods);
+
+  seastar::future<next_step_t> process_wait();
+  seastar::future<next_step_t> client_connect();
+  seastar::future<next_step_t> client_reconnect();
+  void execute_connecting();
+
+  // ACCEPTING (server)
+  seastar::future<> _auth_bad_method(int r);
+  seastar::future<> _handle_auth_request(bufferlist& auth_payload, bool more);
+  seastar::future<> server_auth();
+
+  bool validate_peer_name(const entity_name_t& peer_name) const;
+  seastar::future<next_step_t> send_wait();
+  seastar::future<next_step_t> reuse_connection(ProtocolV2* existing_proto,
+                                                bool do_reset=false,
+                                                bool reconnect=false,
+                                                uint64_t conn_seq=0,
+                                                uint64_t msg_seq=0);
+
+  seastar::future<next_step_t> handle_existing_connection(SocketConnectionRef existing_conn);
+  seastar::future<next_step_t> server_connect();
+
+  seastar::future<next_step_t> read_reconnect();
+  seastar::future<next_step_t> send_retry(uint64_t connect_seq);
+  seastar::future<next_step_t> send_retry_global(uint64_t global_seq);
+  seastar::future<next_step_t> send_reset(bool full);
+  seastar::future<next_step_t> server_reconnect();
+
+  void execute_accepting();
+
+  // CONNECTING/ACCEPTING
+  seastar::future<> finish_auth();
+
+  // ESTABLISHING
+  void execute_establishing(SocketConnectionRef existing_conn);
+
+  // ESTABLISHING/REPLACING (server)
+  seastar::future<> send_server_ident();
+
+  // REPLACING (server)
+  void trigger_replacing(bool reconnect,
+                         bool do_reset,
+                         FrameAssemblerV2::mover_t &&mover,
+                         AuthConnectionMetaRef&& new_auth_meta,
+                         uint64_t new_peer_global_seq,
+                         // !reconnect
+                         uint64_t new_client_cookie,
+                         entity_name_t new_peer_name,
+                         uint64_t new_conn_features,
+                         uint64_t new_peer_supported_features,
+                         // reconnect
+                         uint64_t new_connect_seq,
+                         uint64_t new_msg_seq);
+
+  // READY
+  void execute_ready();
+
+  // STANDBY
+  void execute_standby();
+
+  // WAIT
+  void execute_wait(bool max_backoff);
+
+  // SERVER_WAIT
+  void execute_server_wait();
+
+  // CLOSING
+  // reentrant
+  void do_close(bool is_dispatch_reset,
+                std::optional<std::function<void()>> f_accept_new=std::nullopt);
+
+private:
+  SocketConnection &conn;
+
+  SocketMessenger &messenger;
+
+  IOHandler &io_handler;
+
+  // asynchronously populated from io_handler
+  io_handler_state io_states;
+
+  crosscore_t crosscore;
+
+  bool has_socket = false;
+
+  // the socket exists and it is not shutdown
+  bool is_socket_valid = false;
+
+  FrameAssemblerV2Ref frame_assembler;
+
+  bool need_notify_out = false;
+
+  std::optional<seastar::shared_promise<>> pr_switch_io_shard;
+
+  bool need_exit_io = false;
+
+  std::optional<seastar::shared_promise<>> pr_exit_io;
+
+  AuthConnectionMetaRef auth_meta;
+
+  crimson::common::Gated gate;
+
+  seastar::shared_promise<> pr_closed_clean;
+
+#ifdef UNIT_TESTS_BUILT
+  bool closed_clean = false;
+
+#endif
+  state_t state = state_t::NONE;
+
+  uint64_t peer_supported_features = 0;
+
+  uint64_t client_cookie = 0;
+  uint64_t server_cookie = 0;
+  uint64_t global_seq = 0;
+  uint64_t peer_global_seq = 0;
+  uint64_t connect_seq = 0;
+
+  seastar::future<> execution_done = seastar::now();
+
+  class Timer {
+    double last_dur_ = 0.0;
+    const SocketConnection& conn;
+    std::optional<seastar::abort_source> as;
+   public:
+    Timer(SocketConnection& conn) : conn(conn) {}
+    double last_dur() const { return last_dur_; }
+    seastar::future<> backoff(double seconds);
+    void cancel() {
+      last_dur_ = 0.0;
+      if (as) {
+        as->request_abort();
+        as = std::nullopt;
+      }
+    }
+  };
+  Timer protocol_timer;
+};
+
+struct create_handlers_ret {
+  std::unique_ptr<ConnectionHandler> io_handler;
+  std::unique_ptr<ProtocolV2> protocol;
+};
+inline create_handlers_ret create_handlers(ChainedDispatchers &dispatchers, SocketConnection &conn) {
+  std::unique_ptr<ConnectionHandler> io_handler = std::make_unique<IOHandler>(dispatchers, conn);
+  IOHandler &io_handler_concrete = static_cast<IOHandler&>(*io_handler);
+  auto protocol = std::make_unique<ProtocolV2>(conn, io_handler_concrete);
+  io_handler_concrete.set_handshake_listener(*protocol);
+  return {std::move(io_handler), std::move(protocol)};
+}
+
+} // namespace crimson::net
+
+#if FMT_VERSION >= 90000
+template <> struct fmt::formatter<crimson::net::ProtocolV2> : fmt::ostream_formatter {};
+#endif