MXS-1209: blr_start_master_registration() handles the replication protocol registration
New routine blr_start_master_registration() handles the replication protocol registration
This commit is contained in:
MassimilianoPinto
@ -139,6 +139,7 @@ static void blr_register_cache_response(ROUTER_INSTANCE *router,
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GWBUF **save_buf,
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GWBUF **save_buf,
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const char *save_tag,
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const char *save_tag,
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GWBUF *in_buf);
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GWBUF *in_buf);
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static void blr_start_master_registration(ROUTER_INSTANCE *router, GWBUF *buf);
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static void worker_cb_start_master(int worker_id, void* data);
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static void worker_cb_start_master(int worker_id, void* data);
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static void blr_start_master_in_main(void* data);
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static void blr_start_master_in_main(void* data);
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@ -537,252 +538,11 @@ blr_master_response(ROUTER_INSTANCE *router, GWBUF *buf)
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atomic_add(&router->handling_threads, -1);
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atomic_add(&router->handling_threads, -1);
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return;
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return;
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}
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}
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switch (router->master_state)
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{
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case BLRM_TIMESTAMP:
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/**
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* Previous state was BLRM_TIMESTAMP
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* No need to save the server reply
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*/
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gwbuf_free(buf);
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blr_register_send_command(router,
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"SHOW VARIABLES LIKE 'SERVER_ID'",
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BLRM_SERVERID);
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router->retry_backoff = 1;
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break;
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case BLRM_SERVERID:
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blr_register_heartbeat(router, buf);
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break;
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case BLRM_HBPERIOD:
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blr_register_setchecksum(router, buf);
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break;
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case BLRM_CHKSUM1:
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blr_register_getchecksum(router, buf);
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break;
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case BLRM_CHKSUM2:
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// Set router->master_chksum based on server reply
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blr_register_handle_checksum(router, buf);
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// Next state is BLRM_MARIADB10 or BLRM_GTIDMODE
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{
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unsigned int state = router->mariadb10_compat ?
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BLRM_MARIADB10 :
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BLRM_GTIDMODE;
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const char *command = router->mariadb10_compat ?
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"SET @mariadb_slave_capability=4" :
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"SELECT @@GLOBAL.GTID_MODE";
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blr_register_send_command(router, command, state);
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// Start the Slave Protocol registration with Master server
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}
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blr_start_master_registration(router, buf);
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break;
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case BLRM_MARIADB10:
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// Save server response
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blr_register_cache_response(router,
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&router->saved_master.mariadb10,
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"mariadb10",
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buf);
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// Skip SERVER_UUID fetch and SET slave UUID
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blr_register_send_command(router,
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"SET NAMES latin1",
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BLRM_LATIN1);
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break;
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case BLRM_GTIDMODE: // MySQL 5.6/7 only
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blr_register_serveruuid(router, buf);
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break;
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case BLRM_MUUID: // MySQL 5.6/7 only
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blr_register_slaveuuid(router, buf);
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break;
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case BLRM_SUUID: // MySQL 5.6/7 only
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// Save server response
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blr_register_cache_response(router,
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&router->saved_master.setslaveuuid,
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"ssuuid",
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buf);
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blr_register_send_command(router,
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"SET NAMES latin1",
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BLRM_LATIN1);
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break;
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case BLRM_LATIN1:
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blr_register_utf8(router, buf);
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break;
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case BLRM_UTF8:
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// Save server response
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blr_register_cache_response(router,
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&router->saved_master.utf8,
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"utf8",
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buf);
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// Next state is MAXWELL BLRM_RESULTS_CHARSET or
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// BLRM_SELECT1
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{
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unsigned int state = router->maxwell_compat ?
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BLRM_RESULTS_CHARSET :
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BLRM_SELECT1;
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const char *command = router->maxwell_compat ?
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"SET character_set_results = NULL" :
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"SELECT 1";
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blr_register_send_command(router, command, state);
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break;
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}
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case BLRM_RESULTS_CHARSET:
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gwbuf_free(buf); // Discard server reply, don't save it
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blr_register_send_command(router,
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MYSQL_CONNECTOR_SQL_MODE_QUERY,
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BLRM_SQL_MODE);
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break;
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case BLRM_SQL_MODE:
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gwbuf_free(buf); // Discard server reply, don't save it
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blr_register_send_command(router,
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"SELECT 1",
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BLRM_SELECT1);
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break;
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case BLRM_SELECT1:
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blr_register_selectversion(router, buf);
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break;
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case BLRM_SELECTVER:
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blr_register_selectvercomment(router, buf);
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break;
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case BLRM_SELECTVERCOM:
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blr_register_selecthostname(router, buf);
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break;
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case BLRM_SELECTHOSTNAME:
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blr_register_selectmap(router, buf);
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break;
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case BLRM_MAP:
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// Save server response
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blr_register_cache_response(router,
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&router->saved_master.map,
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"map",
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buf);
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if (router->maxwell_compat)
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{
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blr_register_send_command(router,
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MYSQL_CONNECTOR_SERVER_VARS_QUERY,
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BLRM_SERVER_VARS);
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break;
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}
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else
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{
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// Continue: ready for the registration, nothing to write/read
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router->master_state = BLRM_REGISTER_READY;
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}
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case BLRM_SERVER_VARS:
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/**
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* This branch could be reached as fallthrough from BLRM_MAP
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* with new state BLRM_REGISTER_READY
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* Go ahead if maxwell_compat is not set
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*/
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if (router->master_state == BLRM_SERVER_VARS && router->maxwell_compat)
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{
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blr_register_mxw_binlogvars(router, buf);
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break;
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}
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case BLRM_BINLOG_VARS:
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/**
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* This branch could be reached as fallthrough from BLRM_MAP
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* with new state BLRM_REGISTER_READY.
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* Go ahead if maxwell_compat is not set
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*/
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if (router->master_state == BLRM_BINLOG_VARS && router->maxwell_compat)
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{
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blr_register_mxw_tables(router, buf);
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break;
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}
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case BLRM_LOWER_CASE_TABLES:
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/**
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* This branch could be reached as fallthrough from BLRM_MAP
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* with new state BLRM_REGISTER_READY.
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* Go ahead if maxwell_compat is not set
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*/
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if (router->master_state == BLRM_LOWER_CASE_TABLES &&
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router->maxwell_compat)
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{
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blr_register_mxw_handlelowercase(router, buf);
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// Continue: ready for the registration, nothing to write/read
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}
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case BLRM_REGISTER_READY:
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// Prepare Slave registration request: COM_REGISTER_SLAVE
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buf = blr_make_registration(router);
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// Set new state
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router->master_state = BLRM_REGISTER;
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// Send the packet
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router->master->func.write(router->master, buf);
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break;
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case BLRM_REGISTER:
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/* discard master reply to COM_REGISTER_SLAVE */
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gwbuf_free(buf);
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/* if semisync option is set, check for master semi-sync availability */
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if (router->request_semi_sync)
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{
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blr_register_getsemisync(router, buf);
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break;
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}
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else
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{
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/* Continue */
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router->master_state = BLRM_REQUEST_BINLOGDUMP;
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}
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case BLRM_CHECK_SEMISYNC:
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/**
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* This branch could be reached as fallthrough from BLRM_REGISTER
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* if request_semi_sync option is false
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*/
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if (router->master_state == BLRM_CHECK_SEMISYNC)
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{
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if (blr_register_setsemisync(router, buf))
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{
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break;
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}
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}
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case BLRM_REQUEST_SEMISYNC:
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/**
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* This branch could be reached as fallthrough from BLRM_REGISTER or BLRM_CHECK_SEMISYNC
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* if request_semi_sync option is false or master doesn't support semisync or it's not enabled
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*/
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if (router->master_state == BLRM_REQUEST_SEMISYNC)
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{
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/* discard master reply */
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gwbuf_free(buf);
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/* Continue */
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router->master_state = BLRM_REQUEST_BINLOGDUMP;
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}
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case BLRM_REQUEST_BINLOGDUMP:
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/**
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* This branch is reached after semi-sync check/request or
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* just after sending COM_REGISTER_SLAVE if request_semi_sync option is false
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*/
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/* Request now a dump of the binlog file: COM_BINLOG_DUMP */
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buf = blr_make_binlog_dump(router);
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router->master_state = BLRM_BINLOGDUMP;
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router->master->func.write(router->master, buf);
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MXS_NOTICE("%s: Request binlog records from %s at "
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"position %lu from master server [%s]:%d",
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router->service->name, router->binlog_name,
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router->current_pos,
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router->service->dbref->server->name,
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router->service->dbref->server->port);
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/* Log binlog router identity */
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blr_log_identity(router);
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break;
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case BLRM_BINLOGDUMP:
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/**
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* Main body, we have received a binlog record from the master
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*/
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blr_handle_binlog_record(router, buf);
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/**
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* Set heartbeat check task
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*/
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snprintf(task_name, BLRM_TASK_NAME_LEN, "%s heartbeat", router->service->name);
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hktask_add(task_name, blr_check_last_master_event, router, router->heartbeat);
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break;
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}
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// Check whether re-connect to master is needed
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if (router->reconnect_pending)
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if (router->reconnect_pending)
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{
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{
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blr_restart_master(router);
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blr_restart_master(router);
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@ -3086,3 +2846,265 @@ static void blr_register_cache_response(ROUTER_INSTANCE *router,
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// New value saved to disk
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// New value saved to disk
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blr_cache_response(router, (char *)save_tag, in_buf);
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blr_cache_response(router, (char *)save_tag, in_buf);
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}
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}
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/**
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* Slave Protocol registration to Master:
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*
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* Handling the registration process:
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*
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* Note: some phases are specific to MySQL 5.6/5.7,
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* others to MariaDB10.
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*
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* @param router Current router instance
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* @param in_buf GWBUF with previous phase server response
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*/
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static void blr_start_master_registration(ROUTER_INSTANCE *router, GWBUF *buf)
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{
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char task_name[BLRM_TASK_NAME_LEN + 1] = "";
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switch (router->master_state)
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{
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case BLRM_TIMESTAMP:
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/**
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* Previous state was BLRM_TIMESTAMP
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* No need to save the server reply
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*/
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gwbuf_free(buf);
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blr_register_send_command(router,
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"SHOW VARIABLES LIKE 'SERVER_ID'",
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BLRM_SERVERID);
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router->retry_backoff = 1;
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break;
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case BLRM_SERVERID:
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blr_register_heartbeat(router, buf);
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break;
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case BLRM_HBPERIOD:
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blr_register_setchecksum(router, buf);
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break;
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case BLRM_CHKSUM1:
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blr_register_getchecksum(router, buf);
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break;
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case BLRM_CHKSUM2:
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// Set router->master_chksum based on server reply
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blr_register_handle_checksum(router, buf);
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// Next state is BLRM_MARIADB10 or BLRM_GTIDMODE
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{
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unsigned int state = router->mariadb10_compat ?
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BLRM_MARIADB10 :
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BLRM_GTIDMODE;
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const char *command = router->mariadb10_compat ?
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|
"SET @mariadb_slave_capability=4" :
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|
"SELECT @@GLOBAL.GTID_MODE";
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|
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blr_register_send_command(router, command, state);
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}
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break;
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case BLRM_MARIADB10:
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// Save server response
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blr_register_cache_response(router,
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&router->saved_master.mariadb10,
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"mariadb10",
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|
buf);
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// Skip SERVER_UUID fetch and SET slave UUID
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|
blr_register_send_command(router,
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"SET NAMES latin1",
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BLRM_LATIN1);
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break;
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case BLRM_GTIDMODE: // MySQL 5.6/7 only
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blr_register_serveruuid(router, buf);
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break;
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case BLRM_MUUID: // MySQL 5.6/7 only
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blr_register_slaveuuid(router, buf);
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break;
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case BLRM_SUUID: // MySQL 5.6/7 only
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// Save server response
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blr_register_cache_response(router,
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&router->saved_master.setslaveuuid,
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"ssuuid",
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buf);
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blr_register_send_command(router,
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"SET NAMES latin1",
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BLRM_LATIN1);
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break;
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case BLRM_LATIN1:
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blr_register_utf8(router, buf);
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break;
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case BLRM_UTF8:
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// Save server response
|
||||||
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blr_register_cache_response(router,
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|
&router->saved_master.utf8,
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|
"utf8",
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buf);
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||||||
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// Next state is MAXWELL BLRM_RESULTS_CHARSET or
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||||||
|
// BLRM_SELECT1
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||||||
|
{
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||||||
|
unsigned int state = router->maxwell_compat ?
|
||||||
|
BLRM_RESULTS_CHARSET :
|
||||||
|
BLRM_SELECT1;
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||||||
|
const char *command = router->maxwell_compat ?
|
||||||
|
"SET character_set_results = NULL" :
|
||||||
|
"SELECT 1";
|
||||||
|
|
||||||
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blr_register_send_command(router, command, state);
|
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|
break;
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||||||
|
}
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case BLRM_RESULTS_CHARSET:
|
||||||
|
gwbuf_free(buf); // Discard server reply, don't save it
|
||||||
|
blr_register_send_command(router,
|
||||||
|
MYSQL_CONNECTOR_SQL_MODE_QUERY,
|
||||||
|
BLRM_SQL_MODE);
|
||||||
|
break;
|
||||||
|
case BLRM_SQL_MODE:
|
||||||
|
gwbuf_free(buf); // Discard server reply, don't save it
|
||||||
|
blr_register_send_command(router,
|
||||||
|
"SELECT 1",
|
||||||
|
BLRM_SELECT1);
|
||||||
|
break;
|
||||||
|
case BLRM_SELECT1:
|
||||||
|
blr_register_selectversion(router, buf);
|
||||||
|
break;
|
||||||
|
case BLRM_SELECTVER:
|
||||||
|
blr_register_selectvercomment(router, buf);
|
||||||
|
break;
|
||||||
|
case BLRM_SELECTVERCOM:
|
||||||
|
blr_register_selecthostname(router, buf);
|
||||||
|
break;
|
||||||
|
case BLRM_SELECTHOSTNAME:
|
||||||
|
blr_register_selectmap(router, buf);
|
||||||
|
break;
|
||||||
|
case BLRM_MAP:
|
||||||
|
// Save server response
|
||||||
|
blr_register_cache_response(router,
|
||||||
|
&router->saved_master.map,
|
||||||
|
"map",
|
||||||
|
buf);
|
||||||
|
if (router->maxwell_compat)
|
||||||
|
{
|
||||||
|
blr_register_send_command(router,
|
||||||
|
MYSQL_CONNECTOR_SERVER_VARS_QUERY,
|
||||||
|
BLRM_SERVER_VARS);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
// Continue: ready for the registration, nothing to write/read
|
||||||
|
router->master_state = BLRM_REGISTER_READY;
|
||||||
|
}
|
||||||
|
case BLRM_SERVER_VARS:
|
||||||
|
/**
|
||||||
|
* This branch could be reached as fallthrough from BLRM_MAP
|
||||||
|
* with new state BLRM_REGISTER_READY
|
||||||
|
* Go ahead if maxwell_compat is not set
|
||||||
|
*/
|
||||||
|
if (router->master_state == BLRM_SERVER_VARS && router->maxwell_compat)
|
||||||
|
{
|
||||||
|
blr_register_mxw_binlogvars(router, buf);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case BLRM_BINLOG_VARS:
|
||||||
|
/**
|
||||||
|
* This branch could be reached as fallthrough from BLRM_MAP
|
||||||
|
* with new state BLRM_REGISTER_READY.
|
||||||
|
* Go ahead if maxwell_compat is not set
|
||||||
|
*/
|
||||||
|
if (router->master_state == BLRM_BINLOG_VARS && router->maxwell_compat)
|
||||||
|
{
|
||||||
|
blr_register_mxw_tables(router, buf);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
case BLRM_LOWER_CASE_TABLES:
|
||||||
|
/**
|
||||||
|
* This branch could be reached as fallthrough from BLRM_MAP
|
||||||
|
* with new state BLRM_REGISTER_READY.
|
||||||
|
* Go ahead if maxwell_compat is not set
|
||||||
|
*/
|
||||||
|
if (router->master_state == BLRM_LOWER_CASE_TABLES &&
|
||||||
|
router->maxwell_compat)
|
||||||
|
{
|
||||||
|
blr_register_mxw_handlelowercase(router, buf);
|
||||||
|
// Continue: ready for the registration, nothing to write/read
|
||||||
|
}
|
||||||
|
case BLRM_REGISTER_READY:
|
||||||
|
// Prepare Slave registration request: COM_REGISTER_SLAVE
|
||||||
|
buf = blr_make_registration(router);
|
||||||
|
// Set new state
|
||||||
|
router->master_state = BLRM_REGISTER;
|
||||||
|
// Send the packet
|
||||||
|
router->master->func.write(router->master, buf);
|
||||||
|
break;
|
||||||
|
case BLRM_REGISTER:
|
||||||
|
/* discard master reply to COM_REGISTER_SLAVE */
|
||||||
|
gwbuf_free(buf);
|
||||||
|
|
||||||
|
/* if semisync option is set, check for master semi-sync availability */
|
||||||
|
if (router->request_semi_sync)
|
||||||
|
{
|
||||||
|
blr_register_getsemisync(router, buf);
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
/* Continue */
|
||||||
|
router->master_state = BLRM_REQUEST_BINLOGDUMP;
|
||||||
|
}
|
||||||
|
case BLRM_CHECK_SEMISYNC:
|
||||||
|
/**
|
||||||
|
* This branch could be reached as fallthrough from BLRM_REGISTER
|
||||||
|
* if request_semi_sync option is false
|
||||||
|
*/
|
||||||
|
if (router->master_state == BLRM_CHECK_SEMISYNC)
|
||||||
|
{
|
||||||
|
if (blr_register_setsemisync(router, buf))
|
||||||
|
{
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
case BLRM_REQUEST_SEMISYNC:
|
||||||
|
/**
|
||||||
|
* This branch could be reached as fallthrough from BLRM_REGISTER or BLRM_CHECK_SEMISYNC
|
||||||
|
* if request_semi_sync option is false or master doesn't support semisync or it's not enabled
|
||||||
|
*/
|
||||||
|
if (router->master_state == BLRM_REQUEST_SEMISYNC)
|
||||||
|
{
|
||||||
|
/* discard master reply */
|
||||||
|
gwbuf_free(buf);
|
||||||
|
|
||||||
|
/* Continue */
|
||||||
|
router->master_state = BLRM_REQUEST_BINLOGDUMP;
|
||||||
|
}
|
||||||
|
case BLRM_REQUEST_BINLOGDUMP:
|
||||||
|
/**
|
||||||
|
* This branch is reached after semi-sync check/request or
|
||||||
|
* just after sending COM_REGISTER_SLAVE if request_semi_sync option is false
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* Request now a dump of the binlog file: COM_BINLOG_DUMP */
|
||||||
|
buf = blr_make_binlog_dump(router);
|
||||||
|
router->master_state = BLRM_BINLOGDUMP;
|
||||||
|
router->master->func.write(router->master, buf);
|
||||||
|
|
||||||
|
MXS_NOTICE("%s: Request binlog records from %s at "
|
||||||
|
"position %lu from master server [%s]:%d",
|
||||||
|
router->service->name, router->binlog_name,
|
||||||
|
router->current_pos,
|
||||||
|
router->service->dbref->server->name,
|
||||||
|
router->service->dbref->server->port);
|
||||||
|
|
||||||
|
/* Log binlog router identity */
|
||||||
|
blr_log_identity(router);
|
||||||
|
break;
|
||||||
|
case BLRM_BINLOGDUMP:
|
||||||
|
/**
|
||||||
|
* Main body, we have received a binlog record from the master
|
||||||
|
*/
|
||||||
|
blr_handle_binlog_record(router, buf);
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Set heartbeat check task
|
||||||
|
*/
|
||||||
|
snprintf(task_name, BLRM_TASK_NAME_LEN, "%s heartbeat", router->service->name);
|
||||||
|
hktask_add(task_name, blr_check_last_master_event, router, router->heartbeat);
|
||||||
|
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|||||||
Reference in New Issue
Block a user