134 lines
4.9 KiB
C++
134 lines
4.9 KiB
C++
/*
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Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "sql/conn_handler/init_net_server_extension.h"
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#include <stddef.h>
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#include "lex_string.h"
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#include "my_compiler.h"
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#include "my_dbug.h"
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#include "my_psi_config.h"
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#include "mysql/components/services/psi_socket_bits.h"
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#include "mysql/components/services/psi_statement_bits.h"
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#include "mysql/psi/mysql_idle.h" // MYSQL_SOCKET_SET_STATE,
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#include "mysql/psi/mysql_socket.h"
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#include "mysql/psi/mysql_statement.h"
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#include "mysql_com.h"
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#include "mysql_com_server.h"
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// MYSQL_START_IDLE_WAIT
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#include "sql/mysqld.h" // stage_starting
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#include "sql/protocol_classic.h"
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#include "sql/sql_class.h" // THD
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#include "violite.h"
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#include "ppi/ppi_statement.h"
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#ifdef HAVE_PSI_STATEMENT_INTERFACE // TODO: << nonconformance with
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// HAVE_PSI_INTERFACE
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PSI_statement_info stmt_info_new_packet;
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#endif
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static void net_before_header_psi(NET *net MY_ATTRIBUTE((unused)),
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void *user_data, size_t /* unused: count */) {
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THD *thd;
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thd = static_cast<THD *>(user_data);
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DBUG_ASSERT(thd != NULL);
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if (thd->m_server_idle) {
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/*
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The server is IDLE, waiting for the next command.
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Technically, it is a wait on a socket, which may take a long time,
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because the call is blocking.
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Disable the socket instrumentation, to avoid recording a SOCKET event.
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Instead, start explicitly an IDLE event.
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*/
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MYSQL_SOCKET_SET_STATE(net->vio->mysql_socket, PSI_SOCKET_STATE_IDLE);
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MYSQL_START_IDLE_WAIT(thd->m_idle_psi, &thd->m_idle_state);
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}
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}
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static void net_after_header_psi(NET *net MY_ATTRIBUTE((unused)),
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void *user_data, size_t /* unused: count */,
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bool rc) {
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THD *thd;
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thd = static_cast<THD *>(user_data);
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DBUG_ASSERT(thd != NULL);
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if (thd->m_server_idle) {
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/*
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The server just got data for a network packet header,
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from the network layer.
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The IDLE event is now complete, since we now have a message to process.
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We need to:
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- start a new STATEMENT event
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- start a new STAGE event, within this statement,
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- start recording SOCKET WAITS events, within this stage.
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The proper order is critical to get events numbered correctly,
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and nested in the proper parent.
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*/
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MYSQL_END_IDLE_WAIT(thd->m_idle_psi);
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if (!rc) {
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DBUG_ASSERT(thd->m_statement_psi == NULL);
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thd->m_statement_psi = MYSQL_START_STATEMENT(
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&thd->m_statement_state, stmt_info_new_packet.m_key, thd->db().str,
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thd->db().length, thd->charset(), NULL);
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/* */
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PPI_STATEMENT_CALL(start_statement)
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(thd->ppi_thread, thd->ppi_statement_stat.get());
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/*
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Starts a new stage in performance schema, if compiled in and enabled.
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Also sets THD::proc_info (used by SHOW PROCESSLIST, column STATE)
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*/
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THD_STAGE_INFO(thd, stage_starting);
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}
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/*
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TODO: consider recording a SOCKET event for the bytes just read,
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by also passing count here.
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*/
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MYSQL_SOCKET_SET_STATE(net->vio->mysql_socket, PSI_SOCKET_STATE_ACTIVE);
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thd->m_server_idle = false;
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}
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}
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void init_net_server_extension(THD *thd) {
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/* Start with a clean state for connection events. */
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thd->m_idle_psi = NULL;
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thd->m_statement_psi = NULL;
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thd->m_server_idle = false;
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/* Hook up the NET_SERVER callback in the net layer. */
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thd->m_net_server_extension.m_user_data = thd;
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thd->m_net_server_extension.m_before_header = net_before_header_psi;
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thd->m_net_server_extension.m_after_header = net_after_header_psi;
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thd->m_net_server_extension.compress_ctx.algorithm = MYSQL_UNCOMPRESSED;
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/* Activate this private extension for the mysqld server. */
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thd->get_protocol_classic()->get_net()->extension =
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&thd->m_net_server_extension;
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}
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