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Detect and store MariaDB GTID

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If Binlog Server is running with MariaDB 10 compatibility then the
found GTID is stored in router->mariadb_gtid
This commit is contained in:
MassimilianoPinto
2017-02-15 08:28:47 +01:00
parent 71707c8505
commit a0b599730c
5 changed files with 95 additions and 47 deletions
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107
server/modules/routing/binlogrouter/blr_master.c
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@ -1368,54 +1368,72 @@ blr_handle_binlog_record(ROUTER_INSTANCE *router, GWBUF *pkt)
* Only complete transactions should be sent to sleves
*/
/**
* If MariaDB 10 compatibility:
* check for MARIADB10_GTID_EVENT with flags = 0
* This marks the transaction starts instead of
* QUERY_EVENT with "BEGIN"
*/
if (router->trx_safe)
if (router->mariadb10_compat && hdr.event_type == MARIADB10_GTID_EVENT)
{
if (router->mariadb10_compat)
{
if (hdr.event_type == MARIADB10_GTID_EVENT)
{
uint64_t n_sequence;
uint32_t domainid;
unsigned int flags;
n_sequence = extract_field(ptr + MYSQL_HEADER_LEN + 1 + BINLOG_EVENT_HDR_LEN, 64);
domainid = extract_field(ptr + MYSQL_HEADER_LEN + 1 + BINLOG_EVENT_HDR_LEN + 8, 32);
flags = *(ptr + MYSQL_HEADER_LEN + 1 + BINLOG_EVENT_HDR_LEN + 8 + 4);
if ((flags & (MARIADB_FL_DDL | MARIADB_FL_STANDALONE)) == 0)
{
spinlock_acquire(&router->binlog_lock);
if (router->pending_transaction > 0)
{
MXS_ERROR("A MariaDB 10 transaction "
"is already open "
"@ %lu (GTID %u-%u-%lu) and "
"a new one starts @ %lu",
router->binlog_position,
domainid, hdr.serverid,
n_sequence,
router->current_pos);
// An action should be taken here
}
router->pending_transaction = BLRM_TRANSACTION_START;
spinlock_release(&router->binlog_lock);
}
}
}
/**
* look for QUERY_EVENT [BEGIN / COMMIT] and XID_EVENT
* If MariaDB 10 compatibility:
* check for MARIADB10_GTID_EVENT with flags:
* this is the TRASACTION START detection.
*
* Save GTID anyway and if trx_safe is set mark the transaction start
*/
uint64_t n_sequence;
uint32_t domainid;
unsigned int flags;
n_sequence = extract_field(ptr + MYSQL_HEADER_LEN + 1 + BINLOG_EVENT_HDR_LEN, 64);
domainid = extract_field(ptr + MYSQL_HEADER_LEN + 1 + BINLOG_EVENT_HDR_LEN + 8, 32);
flags = *(ptr + MYSQL_HEADER_LEN + 1 + BINLOG_EVENT_HDR_LEN + 8 + 4);
if ((flags & (MARIADB_FL_DDL | MARIADB_FL_STANDALONE)) == 0)
{
char mariadb_gtid[GTID_MAX_LEN + 1];
snprintf(mariadb_gtid, GTID_MAX_LEN, "%u-%u-%lu",
domainid, hdr.serverid,
n_sequence);
MXS_DEBUG("MariaDB GTID received: (%s). Current file %s, pos %lu",
router->mariadb_gtid,
router->binlog_name,
router->binlog_position);
spinlock_acquire(&router->binlog_lock);
/* Save GTID */
strcpy(router->mariadb_gtid, mariadb_gtid);
/**
* Now mark the new open transaction
*/
if (router->trx_safe)
{
if (router->pending_transaction > 0)
{
MXS_ERROR("A MariaDB 10 transaction "
"is already open "
"@ %lu (GTID %s) and "
"a new one starts @ %lu",
router->binlog_position,
mariadb_gtid,
router->current_pos);
}
router->pending_transaction = BLRM_TRANSACTION_START;
}
spinlock_release(&router->binlog_lock);
}
}
/**
* If trx_safe is set then look for:
* - QUERY_EVENT: BEGIN | START TRANSACTION | COMMIT
* - XID_EVENT for transactional storage edngines
*/
if (router->trx_safe)
{
if (hdr.event_type == QUERY_EVENT)
{
char *statement_sql;
@ -1444,7 +1462,6 @@ blr_handle_binlog_record(ROUTER_INSTANCE *router, GWBUF *pkt)
router->binlog_position,
router->current_pos);
// An action should be taken here
}
router->pending_transaction = BLRM_TRANSACTION_START;