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STOP/START SLAVE first implementation

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STOP/START SLAVE first implementation
This commit is contained in:
MassimilianoPinto
2015-05-25 17:37:39 +02:00
parent c1b956af2c
commit 7634f22a94
3 changed files with 126 additions and 13 deletions
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110
server/modules/routing/binlog/blr_slave.c
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@ -36,6 +36,7 @@
* 18/02/2015 Massimiliano Pinto Addition of DISCONNECT ALL and DISCONNECT SERVER server_id
* 18/03/2015 Markus Makela Better detection of CRC32 | NONE checksum
* 19/03/2015 Massimiliano Pinto Addition of basic MariaDB 10 compatibility support
* 25/05/2015 Massimiliano Pinto Addition BLRM_SLAVE_STOPPED state and blr_start/stop_slave
*
* @endverbatim
*/
@ -83,6 +84,8 @@ static int blr_slave_send_disconnected_server(ROUTER_INSTANCE *router, ROUTER_SL
static int blr_slave_disconnect_all(ROUTER_INSTANCE *router, ROUTER_SLAVE *slave);
static int blr_slave_disconnect_server(ROUTER_INSTANCE *router, ROUTER_SLAVE *slave, int server_id);
static int blr_slave_send_ok(ROUTER_INSTANCE* router, ROUTER_SLAVE* slave);
static int blr_stop_slave(ROUTER_INSTANCE* router, ROUTER_SLAVE* slave);
static int blr_start_slave(ROUTER_INSTANCE* router, ROUTER_SLAVE* slave);
extern int lm_enabled_logfiles_bitmask;
extern size_t log_ses_count[];
@ -411,13 +414,41 @@ int query_len;
}
}
}
/* start replication from the current configured master */
else if (strcasecmp(query_text, "START") == 0)
{
if ((word = strtok_r(NULL, sep, &brkb)) == NULL)
{
LOGIF(LE, (skygw_log_write(LOGFILE_ERROR, "%s: Incomplete START command.",
router->service->name)));
}
else if (strcasecmp(word, "SLAVE") == 0)
{
free(query_text);
return blr_start_slave(router, slave);
}
}
/* stop replication from the current */
else if (strcasecmp(query_text, "STOP") == 0)
{
if ((word = strtok_r(NULL, sep, &brkb)) == NULL)
{
LOGIF(LE, (skygw_log_write(LOGFILE_ERROR, "%s: Incomplete STOP command.",
router->service->name)));
}
else if (strcasecmp(word, "SLAVE") == 0)
{
free(query_text);
return blr_stop_slave(router, slave);
}
}
else if (strcasecmp(query_text, "DISCONNECT") == 0)
{
if ((word = strtok_r(NULL, sep, &brkb)) == NULL)
{
LOGIF(LE, (skygw_log_write(LOGFILE_ERROR, "%s: Incomplete DISCONNECT command.",
router->service->name)));
}
else if (strcasecmp(word, "ALL") == 0)
{
@ -2084,12 +2115,16 @@ blr_slave_disconnect_all(ROUTER_INSTANCE *router, ROUTER_SLAVE *slave)
return 1;
}
/**
* Send a MySQL OK packet to the DCB
* Send a MySQL OK packet to the slave backend
*
* @param router The binlog router instance
* @param slave The slave server to which we are sending the response
*
* @param dcb The DCB to send the OK packet to
* @return result of a write call, non-zero if write was successful
*/
static int
blr_slave_send_ok(ROUTER_INSTANCE* router, ROUTER_SLAVE* slave)
{
@ -2110,5 +2145,74 @@ uint8_t *ptr;
*ptr++ = 0;
*ptr++ = 0;
*ptr++ = 0;
return slave->dcb->func.write(slave->dcb, pkt);
}
/**
* Stop current replication from master
*
* @param router The binlog router instance
* @param slave The slave server to which we are sending the response*
*
*/
static int
blr_stop_slave(ROUTER_INSTANCE* router, ROUTER_SLAVE* slave)
{
LOGIF(LM, (skygw_log_write(LOGFILE_MESSAGE, "%s: STOP SLAVE received by %s@%s. Disconnecting from master %s:%d",
router->service->name,
slave->dcb->user,
slave->dcb->remote,
router->service->dbref->server->name,
router->service->dbref->server->port)));
if (router->master_state != BLRM_SLAVE_STOPPED) {
if (router->master->fd != -1)
blr_master_close(router);
spinlock_acquire(&router->lock);
router->master_state = BLRM_SLAVE_STOPPED;
spinlock_release(&router->lock);
return blr_slave_send_ok(router, slave);
} else {
blr_slave_send_error(router, slave, "Slave connection is not running");
return 1;
}
}
/**
* Start replication from current configured master
*
* @param router The binlog router instance
* @param slave The slave server to which we are sending the response
*
*/
static int
blr_start_slave(ROUTER_INSTANCE* router, ROUTER_SLAVE* slave)
{
LOGIF(LM, (skygw_log_write(LOGFILE_MESSAGE, "%s: START SLAVE received by %s@%s. Trying connection to master %s:%d",
router->service->name,
slave->dcb->user,
slave->dcb->remote,
router->service->dbref->server->name,
router->service->dbref->server->port)));
if ( (router->master_state == BLRM_UNCONNECTED) || (router->master_state == BLRM_SLAVE_STOPPED) ) {
spinlock_acquire(&router->lock);
router->master_state = BLRM_UNCONNECTED;
spinlock_release(&router->lock);
blr_start_master(router);
return blr_slave_send_ok(router, slave);
} else {
blr_slave_send_error(router, slave, "Slave connection is already running");
return 1;
}
}