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Create socket with provided executor #909

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Create socket with provided executor #909

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0600c1d
GH-819 Provide lambda for socket executor
heifner Oct 7, 2024
65f76dc
GH-819 Update to provide required lambda for socket executor
heifner Oct 7, 2024
e677e41
GH-819 Add better comments
heifner Oct 8, 2024
b249840
GH-819 Use socket executor which was a strand provided to the socket
heifner Oct 8, 2024
7698f36
GH-819 Use socket executor which was provided as a strand to the socket
heifner Oct 8, 2024
6b5ab76
GH-819 Simplify code by running listener on the main thread
heifner Oct 8, 2024
3bb1a81
Merge branch 'main' into GH-819-listener-strand
heifner Oct 8, 2024
db2dcc4
Revert "GH-819 Simplify code by running listener on the main thread"
heifner Oct 8, 2024
abab173
GH-819 Update comments
heifner Oct 8, 2024
426a024
Merge remote-tracking branch 'spring/main' into GH-819-listener-strand
heifner Oct 8, 2024
fea909b
GH-819 Add requires
heifner Oct 8, 2024
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51 changes: 41 additions & 10 deletions libraries/libfc/include/fc/network/listener.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -58,30 +58,49 @@ struct listener_base<boost::asio::local::stream_protocol> {
/// @note Users should use fc::create_listener() instead, this class is the implementation
/// detail for fc::create_listener().
///
/// @tparam Protocol either \c boost::asio::ip::tcp or \c boost::asio::local::stream_protocol
/// @tparam Executor The executor for the acceptor and acceptor timer
/// @tparam SocketExecutorFn Function that returns executor to be used for the newly accepted socket:
/// ExecutorType(const endpoint_type&)
/// @tparam CreateSession Callback Function to call after each accepted connection, provides newly created socket
/// and the Executor of the newly accepted socket: void(Socket&& socket, ExecutorType& ex)
/// Note that the ExecutorType provided by SocketExecutorFn can be retrieved from the socket
/// via socket.get_executor().
///
/////////////////////////////////////////////////////////////////////////////////////////////
template <typename Protocol, typename Executor, typename CreateSession>
struct listener : listener_base<Protocol>, std::enable_shared_from_this<listener<Protocol, Executor, CreateSession>> {
template <typename Protocol, typename Executor, typename SocketExecutorFn, typename CreateSession>
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requires (std::is_same_v<Protocol, boost::asio::ip::tcp> || std::is_same_v<Protocol, boost::asio::local::stream_protocol>) &&
std::invocable<SocketExecutorFn&, typename Protocol::endpoint>
struct listener : listener_base<Protocol>, std::enable_shared_from_this<listener<Protocol, Executor, SocketExecutorFn, CreateSession>> {
private:
typename Protocol::acceptor acceptor_;
boost::asio::deadline_timer accept_error_timer_;
boost::posix_time::time_duration accept_timeout_;
logger& logger_;
std::string extra_listening_log_info_;
SocketExecutorFn socket_executor_fn_;
CreateSession create_session_;

public:
using endpoint_type = typename Protocol::endpoint;
listener(Executor& executor, logger& logger, boost::posix_time::time_duration accept_timeout,
const std::string& local_address, const endpoint_type& endpoint,
const std::string& extra_listening_log_info, const CreateSession& create_session)
const std::string& extra_listening_log_info,
SocketExecutorFn socket_executor_fn, CreateSession create_session)
: listener_base<Protocol>(local_address), acceptor_(executor, endpoint), accept_error_timer_(executor),
accept_timeout_(accept_timeout), logger_(logger), extra_listening_log_info_(extra_listening_log_info),
create_session_(create_session) {}
socket_executor_fn_(std::move(socket_executor_fn)), create_session_(std::move(create_session)) {}

const auto& acceptor() const { return acceptor_; }

void do_accept() {
acceptor_.async_accept([self = this->shared_from_this()](boost::system::error_code ec, auto&& peer_socket) {
boost::system::error_code ec;
auto ep = acceptor_.local_endpoint(ec);
if (ec) {
fc_wlog(logger_, "Unable to retrieve local_endpoint of acceptor, error: ${e}", ("e", ec.message()));
}
acceptor_.async_accept(socket_executor_fn_(ep),
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What is the purpose for the changes here and for passing the local endpoint as a parameter to the socket_executor_fn_? (this local endpoint parameter is not used by any of ship/http/p2p)

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I thought it might be useful. If someone was wanting to choose which executor according to which endpoint. I'm happy to remove it since we don't have a current use-case.

[self = this->shared_from_this()](boost::system::error_code ec, auto&& peer_socket) {
self->on_accept(ec, std::forward<decltype(peer_socket)>(peer_socket));
});
}
Expand Down Expand Up @@ -152,16 +171,28 @@ struct listener : listener_base<Protocol>, std::enable_shared_from_this<listener
/// The lifetime of the created listener objects is controlled by \c executor, the created objects will be destroyed
/// when \c executor.stop() is called.
///
/// Each socket is created with the executor returned by SocketExecutorFn.
///
/// @note
/// This function is not thread safe for Unix socket because it will temporarily change working directory without any
/// lock. Any code which depends the current working directory (such as opening files with relative paths) in other
/// threads should be protected.
///
/// @tparam Protocol either \c boost::asio::ip::tcp or \c boost::asio::local::stream_protocol
/// @tparam Executor The executor for the acceptor and acceptor timer
/// @tparam SocketExecutorFn Function that returns executor to be used for the newly accepted socket:
/// ExecutorType(const endpoint_type&)
/// @tparam CreateSession Callback Function to call after each accepted connection, provides newly created socket
/// and the Executor of the newly accepted socket: void(Socket&& socket, ExecutorType& ex)
/// Note that the ExecutorType provided by SocketExecutorFn can be retrieved from the socket
/// via socket.get_executor().
/// @throws std::system_error or boost::system::system_error
template <typename Protocol, typename Executor, typename CreateSession>
template <typename Protocol, typename Executor, typename SocketExecutorFn, typename CreateSession>
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requires (std::is_same_v<Protocol, boost::asio::ip::tcp> || std::is_same_v<Protocol, boost::asio::local::stream_protocol>) &&
std::invocable<SocketExecutorFn&, typename Protocol::endpoint>
void create_listener(Executor& executor, logger& logger, boost::posix_time::time_duration accept_timeout,
const std::string& address, const std::string& extra_listening_log_info,
const SocketExecutorFn& socket_executor_fn,
const CreateSession& create_session) {
using tcp = boost::asio::ip::tcp;
if constexpr (std::is_same_v<Protocol, tcp>) {
Expand All @@ -186,8 +217,8 @@ void create_listener(Executor& executor, logger& logger, boost::posix_time::time
auto create_listener = [&](const auto& endpoint) {
const auto& ip_addr = endpoint.address();
try {
auto listener = std::make_shared<fc::listener<Protocol, Executor, CreateSession>>(
executor, logger, accept_timeout, address, endpoint, extra_listening_log_info, create_session);
auto listener = std::make_shared<fc::listener<Protocol, Executor, SocketExecutorFn, CreateSession>>(
executor, logger, accept_timeout, address, endpoint, extra_listening_log_info, socket_executor_fn, create_session);
listener->log_listening(endpoint, address);
listener->do_accept();
++listened;
Expand Down Expand Up @@ -256,8 +287,8 @@ void create_listener(Executor& executor, logger& logger, boost::posix_time::time
fs::remove(sock_path);
}

auto listener = std::make_shared<fc::listener<stream_protocol, Executor, CreateSession>>(
executor, logger, accept_timeout, address, endpoint, extra_listening_log_info, create_session);
auto listener = std::make_shared<fc::listener<stream_protocol, Executor, SocketExecutorFn, CreateSession>>(
executor, logger, accept_timeout, address, endpoint, extra_listening_log_info, socket_executor_fn, create_session);
listener->log_listening(endpoint, address);
listener->do_accept();
}
Expand Down
4 changes: 3 additions & 1 deletion plugins/http_plugin/http_plugin.cpp
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Expand Up @@ -233,7 +233,9 @@ namespace eosio {
};

fc::create_listener<Protocol>(plugin_state->thread_pool.get_executor(), logger(), accept_timeout, address,
extra_listening_log_info, create_session);
extra_listening_log_info,
[this](const auto&) -> boost::asio::io_context& { return plugin_state->thread_pool.get_executor(); },
create_session);
}

void create_beast_server(const std::string& address, api_category_set categories) {
Expand Down
41 changes: 23 additions & 18 deletions plugins/net_plugin/net_plugin.cpp
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Expand Up @@ -827,8 +827,8 @@ namespace eosio {
std::atomic<boost::asio::ip::port_type> remote_endpoint_port{0};

public:
boost::asio::io_context::strand strand;
std::shared_ptr<tcp::socket> socket; // only accessed through strand after construction
boost::asio::strand<tcp::socket::executor_type> strand;
std::shared_ptr<tcp::socket> socket; // only accessed through strand after construction

fc::message_buffer<1024*1024> pending_message_buffer;
std::size_t outstanding_read_bytes{0}; // accessed only from strand threads
Expand Down Expand Up @@ -1179,8 +1179,8 @@ namespace eosio {

connection::connection( const string& endpoint, const string& listen_address )
: peer_addr( endpoint ),
strand( my_impl->thread_pool.get_executor() ),
socket( new tcp::socket( my_impl->thread_pool.get_executor() ) ),
strand( boost::asio::make_strand(my_impl->thread_pool.get_executor()) ),
socket( new tcp::socket( strand ) ),
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Now that the socket is always being created with a strand (both here and via the listener), that should mean that all the bind_executors to the strand can be removed. Not sure you want to tackle that now or not (going in to 1.0 probably not, but going in to main maybe)

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I left it mainly because it was targeting 1.0. At this point, maybe it would be cleaner. In many places you would have boost::asio::post(socket.get_executor(), [](){}) instead which is not really any difference I don't think.

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You would have to move the timers to using the strand too (afaict not a problem) but after that it does seem like all 5 bind_executors could be removed. I am not seeing the need for boost::asio::post(socket.get_executor(), [](){}) in those same spots. Anyways, it's not something that needs to be done now just a clean up I noticed since we're constructing these more idiomaticly now.

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Oh, you were talking specifically about the bind_executor. I was thinking of the boost::asio::post(strand,.

listen_address( listen_address ),
log_p2p_address( endpoint ),
connection_id( ++my_impl->current_connection_id ),
Expand All @@ -1197,7 +1197,7 @@ namespace eosio {
connection::connection(tcp::socket&& s, const string& listen_address, size_t block_sync_rate_limit)
: peer_addr(),
block_sync_rate_limit(block_sync_rate_limit),
strand( my_impl->thread_pool.get_executor() ),
strand( s.get_executor() ),
socket( new tcp::socket( std::move(s) ) ),
listen_address( listen_address ),
connection_id( ++my_impl->current_connection_id ),
Expand Down Expand Up @@ -1356,7 +1356,7 @@ namespace eosio {

void connection::close( bool reconnect, bool shutdown ) {
set_state(connection_state::closing);
strand.post( [self = shared_from_this(), reconnect, shutdown]() {
boost::asio::post(strand, [self = shared_from_this(), reconnect, shutdown]() {
self->_close( reconnect, shutdown );
});
}
Expand Down Expand Up @@ -1475,7 +1475,7 @@ namespace eosio {
void connection::send_handshake() {
if (closed())
return;
strand.post( [c = shared_from_this()]() {
boost::asio::post(strand, [c = shared_from_this()]() {
fc::unique_lock g_conn( c->conn_mtx );
if( c->populate_handshake( c->last_handshake_sent ) ) {
static_assert( std::is_same_v<decltype( c->sent_handshake_count ), int16_t>, "INT16_MAX based on int16_t" );
Expand Down Expand Up @@ -1568,7 +1568,7 @@ namespace eosio {
std::vector<boost::asio::const_buffer> bufs;
buffer_queue.fill_out_buffer( bufs );

strand.post( [c{std::move(c)}, bufs{std::move(bufs)}]() {
boost::asio::post(strand, [c{std::move(c)}, bufs{std::move(bufs)}]() {
boost::asio::async_write( *c->socket, bufs,
boost::asio::bind_executor( c->strand, [c, socket=c->socket]( boost::system::error_code ec, std::size_t w ) {
try {
Expand Down Expand Up @@ -2076,7 +2076,7 @@ namespace eosio {
sync_source = new_sync_source;
request_sent = true;
sync_active_time = std::chrono::steady_clock::now();
new_sync_source->strand.post( [new_sync_source, start, end, fork_head_num=chain_info.fork_head_num, lib=chain_info.lib_num]() {
boost::asio::post(new_sync_source->strand, [new_sync_source, start, end, fork_head_num=chain_info.fork_head_num, lib=chain_info.lib_num]() {
peer_ilog( new_sync_source, "requesting range ${s} to ${e}, fhead ${h}, lib ${lib}", ("s", start)("e", end)("h", fork_head_num)("lib", lib) );
new_sync_source->request_sync_blocks( start, end );
} );
Expand Down Expand Up @@ -2672,7 +2672,7 @@ namespace eosio {

send_buffer_type sb = buff_factory.get_send_buffer( b );

cp->strand.post( [cp, bnum, sb{std::move(sb)}]() {
boost::asio::post(cp->strand, [cp, bnum, sb{std::move(sb)}]() {
cp->latest_blk_time = std::chrono::steady_clock::now();
bool has_block = cp->peer_lib_num >= bnum;
if( !has_block ) {
Expand All @@ -2690,7 +2690,7 @@ namespace eosio {
my_impl->connections.for_each_block_connection( [exclude_peer, msg{std::move(msg)}]( auto& cp ) {
if( !cp->current() ) return true;
if( cp->connection_id == exclude_peer ) return true;
cp->strand.post( [cp, msg]() {
boost::asio::post(cp->strand, [cp, msg]() {
if (cp->protocol_version >= proto_savanna) {
if (vote_logger.is_enabled(fc::log_level::debug))
peer_dlog(cp, "sending vote msg");
Expand Down Expand Up @@ -2719,7 +2719,7 @@ namespace eosio {

send_buffer_type sb = buff_factory.get_send_buffer( trx );
fc_dlog( logger, "sending trx: ${id}, to connection - ${cid}", ("id", trx->id())("cid", cp->connection_id) );
cp->strand.post( [cp, sb{std::move(sb)}]() {
boost::asio::post(cp->strand, [cp, sb{std::move(sb)}]() {
cp->enqueue_buffer( sb, no_reason );
} );
} );
Expand Down Expand Up @@ -2818,7 +2818,7 @@ namespace eosio {
});

connection_ptr new_connection = std::make_shared<connection>(std::move(socket), listen_address, limit);
new_connection->strand.post([new_connection, this]() {
boost::asio::post(new_connection->strand, [new_connection, this]() {
if (new_connection->start_session()) {
connections.add(new_connection);
}
Expand Down Expand Up @@ -3705,7 +3705,7 @@ namespace eosio {
// may have come in on a different connection and posted into dispatcher strand before this one
if( block_header::num_from_id(id) <= lib_num || my_impl->dispatcher.have_block( id ) || cc.block_exists( id ) ) { // thread-safe
my_impl->dispatcher.add_peer_block( id, c->connection_id );
c->strand.post( [c, id, ptr{std::move(ptr)}]() {
boost::asio::post(c->strand, [c, id, ptr{std::move(ptr)}]() {
const fc::microseconds age(fc::time_point::now() - ptr->timestamp);
my_impl->sync_master->sync_recv_block( c, id, block_header::num_from_id(id), age );
});
Expand Down Expand Up @@ -3752,7 +3752,7 @@ namespace eosio {
fc_dlog(logger, "unlinkable_block ${bn} : ${id}, previous ${pn} : ${pid}",
("bn", ptr->block_num())("id", id)("pn", block_header::num_from_id(ptr->previous))("pid", ptr->previous));
}
c->strand.post( [c, id, blk_num=ptr->block_num(), close_mode]() {
boost::asio::post(c->strand, [c, id, blk_num=ptr->block_num(), close_mode]() {
my_impl->sync_master->rejected_block( c, blk_num, close_mode );
my_impl->dispatcher.rejected_block( id );
});
Expand Down Expand Up @@ -3824,7 +3824,7 @@ namespace eosio {
auto current_time = std::chrono::steady_clock::now();
my->connections.for_each_connection( [current_time]( const connection_ptr& c ) {
if( c->socket_is_open() ) {
c->strand.post([c, current_time]() {
boost::asio::post(c->strand, [c, current_time]() {
c->check_heartbeat(current_time);
} );
}
Expand Down Expand Up @@ -4377,7 +4377,12 @@ namespace eosio {

fc::create_listener<tcp>(
my->thread_pool.get_executor(), logger, accept_timeout, listen_addr, extra_listening_log_info,
[my = my, addr = p2p_addr, block_sync_rate_limit = block_sync_rate_limit](tcp::socket&& socket) { fc_dlog( logger, "start listening on ${addr} with peer sync throttle ${limit}", ("addr", addr)("limit", block_sync_rate_limit)); my->create_session(std::move(socket), addr, block_sync_rate_limit); });
[my = my](const auto&) { return boost::asio::make_strand(my->thread_pool.get_executor()); },
[my = my, addr = p2p_addr, block_sync_rate_limit = block_sync_rate_limit](tcp::socket&& socket) {
fc_dlog( logger, "start listening on ${addr} with peer sync throttle ${limit}",
("addr", addr)("limit", block_sync_rate_limit));
my->create_session(std::move(socket), addr, block_sync_rate_limit);
});
} catch (const plugin_config_exception& e) {
fc_elog( logger, "${msg}", ("msg", e.top_message()));
app().quit();
Expand Down Expand Up @@ -4579,7 +4584,7 @@ namespace eosio {
}
}

strand.post([c, host, port]() {
boost::asio::post(strand, [c, host, port]() {
auto resolver = std::make_shared<tcp::resolver>( my_impl->thread_pool.get_executor() );
resolver->async_resolve(host, port, boost::asio::bind_executor(c->strand,
[resolver, c, host, port]
Expand Down
12 changes: 6 additions & 6 deletions plugins/state_history_plugin/include/eosio/state_history_plugin/session.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -28,17 +28,17 @@ class session_base {
virtual ~session_base() = default;
};

template<typename SocketType, typename Executor, typename GetBlockID, typename GetBlock, typename OnDone>
template<typename SocketType, typename GetBlockID, typename GetBlock, typename OnDone>
requires std::is_same_v<SocketType, boost::asio::ip::tcp::socket> || std::is_same_v<SocketType, boost::asio::local::stream_protocol::socket>
class session final : public session_base {
using coro_throwing_stream = boost::asio::use_awaitable_t<>::as_default_on_t<boost::beast::websocket::stream<SocketType>>;
using coro_nonthrowing_steadytimer = boost::asio::as_tuple_t<boost::asio::use_awaitable_t<>>::as_default_on_t<boost::asio::steady_timer>;

public:
session(SocketType&& s, Executor&& st, chain::controller& controller,
std::optional<log_catalog>& trace_log, std::optional<log_catalog>& chain_state_log, std::optional<log_catalog>& finality_data_log,
GetBlockID&& get_block_id, GetBlock&& get_block, OnDone&& on_done, fc::logger& logger) :
strand(std::move(st)), stream(std::move(s)), wake_timer(strand), controller(controller),
session(SocketType&& s, chain::controller& controller,
std::optional<log_catalog>& trace_log, std::optional<log_catalog>& chain_state_log, std::optional<log_catalog>& finality_data_log,
GetBlockID&& get_block_id, GetBlock&& get_block, OnDone&& on_done, fc::logger& logger) :
strand(s.get_executor()), stream(std::move(s)), wake_timer(strand), controller(controller),
trace_log(trace_log), chain_state_log(chain_state_log), finality_data_log(finality_data_log),
get_block_id(get_block_id), get_block(get_block), on_done(on_done), logger(logger), remote_endpoint_string(get_remote_endpoint_string()) {
fc_ilog(logger, "incoming state history connection from ${a}", ("a", remote_endpoint_string));
Expand Down Expand Up @@ -307,7 +307,7 @@ class session final : public session_base {

private:
///these items must only ever be touched by the session's strand
Executor strand;
SocketType::executor_type strand;
coro_throwing_stream stream;
coro_nonthrowing_steadytimer wake_timer;
unsigned coros_running = 0;
Expand Down
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