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MXS-1266: add MariaDB GTID fields in SHOW SLAVE STATUS

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MXS-1266: add MariaDB GTID fields in SHOW SLAVE STATUS
This commit is contained in:
MassimilianoPinto
2017-06-08 17:35:01 +02:00
parent 887e511fc5
commit c00d829d56
2 changed files with 105 additions and 31 deletions
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113
server/modules/routing/binlogrouter/blr_slave.c
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@ -165,8 +165,10 @@ static int blr_slave_send_fieldcount(ROUTER_INSTANCE *router,
int count);
static int blr_slave_send_columndef(ROUTER_INSTANCE *router,
ROUTER_SLAVE *slave,
char *name, int type,
int len, uint8_t seqno);
const char *name,
int type,
int len,
uint8_t seqno);
static int blr_slave_send_eof(ROUTER_INSTANCE *router,
ROUTER_SLAVE *slave,
int seqno);
@ -1091,7 +1093,7 @@ blr_slave_send_master_status(ROUTER_INSTANCE *router, ROUTER_SLAVE *slave)
/*
* Columns to send for a "SHOW SLAVE STATUS" command
*/
static char *slave_status_columns[] =
static const char *slave_status_columns[] =
{
"Slave_IO_State",
"Master_Host",
@ -1144,6 +1146,24 @@ static char *slave_status_columns[] =
"Last_SQL_Error_Timestamp",
"Master_SSL_Crl",
"Master_SSL_Crlpath",
NULL
};
/*
* New columns to send for a "SHOW ALL SLAVES STATUS" command
*/
static const char *all_slaves_status_columns[] =
{
"Connection_name",
"Slave_SQL_State",
NULL
};
/*
* Columns to send for GTID in "SHOW SLAVE STATUS" MySQL 5.6/7 command
*/
static const char *mysql_gtid_status_columns[] =
{
"Retrieved_Gtid_Set",
"Executed_Gtid_Set",
"Auto_Position",
@ -1151,12 +1171,13 @@ static char *slave_status_columns[] =
};
/*
* New columns to send for a "SHOW ALL SLAVES STATUS" command
* Columns to send for GTID in "SHOW SLAVE STATUS" MariaDB 10 command
* and SHOW ALL SLAVES STATUS as well
*/
static char *all_slaves_status_columns[] =
static const char *mariadb10_gtid_status_columns[] =
{
"Connection_name",
"Slave_SQL_State",
"Using_Gtid",
"Gtid_IO_Pos",
NULL
};
@ -1177,24 +1198,40 @@ blr_slave_send_slave_status(ROUTER_INSTANCE *router,
GWBUF *pkt;
char column[251] = "";
uint8_t *ptr;
int len, actual_len, col_len, seqno, ncols, i;
int len, actual_len, col_len, seqno, i;
char *dyn_column = NULL;
int max_column_size = sizeof(column);
int new_cols;
int ncols = 0;
int gtid_cols = 0;
/* Count SHOW SLAVE STATUS the columns */
for (ncols = 0; slave_status_columns[ncols]; ncols++);
/* Add the new SHOW ALL SLAVES STATUS columns */
for (new_cols = 0; all_slaves_status_columns[new_cols]; new_cols++);
/* Add the new all_slaves columns to the total */
if (all_slaves)
while (slave_status_columns[ncols])
{
ncols += new_cols;
ncols++;
}
/* Add the new SHOW ALL SLAVES STATUS columns */
if (all_slaves)
{
int k = 0;
while (all_slaves_status_columns[k++])
{
ncols++;
}
}
const char **gtid_status_columns = router->mariadb10_gtid ?
mariadb10_gtid_status_columns :
mysql_gtid_status_columns;
/* Increment ncols with the right GTID columns */
while (gtid_status_columns[gtid_cols++])
{
ncols++;
}
/* Send number of columns */
blr_slave_send_fieldcount(router, slave, ncols);
seqno = 2;
if (all_slaves)
{
@ -1219,6 +1256,19 @@ blr_slave_send_slave_status(ROUTER_INSTANCE *router,
40,
seqno++);
}
/* Send MariaDB 10 or MySQL 5.6/7 GTID columns */
for (i = 0; gtid_status_columns[i]; i++)
{
blr_slave_send_columndef(router,
slave,
gtid_status_columns[i],
BLR_TYPE_STRING,
40,
seqno++);
}
/* Send EOF for columns def */
blr_slave_send_eof(router, slave, seqno++);
// Max length + 250 bytes error message
@ -1579,10 +1629,29 @@ blr_slave_send_slave_status(ROUTER_INSTANCE *router,
*ptr++ = 0;
*ptr++ = 0;
// No GTID support send empty values
*ptr++ = 0;
*ptr++ = 0;
*ptr++ = 0;
if (!router->mariadb10_gtid)
{
// No GTID support send empty values
*ptr++ = 0;
*ptr++ = 0;
*ptr++ = 0;
}
else
{
// MariaDB 10 GTID
sprintf(column, "%s", "Slave_pos");
col_len = strlen(column);
*ptr++ = col_len; // Length of result string
memcpy(ptr, column, col_len); // Result string
ptr += col_len;
sprintf(column, "%s", router->last_mariadb_gtid);
col_len = strlen(column);
*ptr++ = col_len; // Length of result string
memcpy(ptr, column, col_len); // Result string
ptr += col_len;
}
*ptr++ = 0;
actual_len = ptr - (uint8_t *)GWBUF_DATA(pkt);
@ -2929,7 +2998,7 @@ blr_slave_send_fieldcount(ROUTER_INSTANCE *router,
static int
blr_slave_send_columndef(ROUTER_INSTANCE *router,
ROUTER_SLAVE *slave,
char *name,
const char *name,
int type,
int len,
uint8_t seqno)