Revert "MDEV-30473 : Do not allow GET_LOCK() / RELEASE_LOCK() in cluster"

This reverts commit b05218e0.

mysql-test/suite/galera/r/MDEV-24143.result

+connection node_2;
+connection node_1;
+CREATE TABLE t1 (c1 BIGINT NOT NULL PRIMARY KEY, c2 BINARY (10), c3 DATETIME);
+SELECT get_lock ('test2', 0);
+get_lock ('test2', 0)
+1
+DROP TABLE t1;
+CREATE TABLE t1 (c1 SMALLINT NOT NULL AUTO_INCREMENT PRIMARY KEY);
+INSERT INTO t1 VALUES (1);
+SET SESSION wsrep_trx_fragment_size=10;
+SET SESSION autocommit=0;
+SELECT * FROM t1 WHERE c1 <=0 ORDER BY c1 DESC;
+c1
+INSERT INTO t1 VALUES (4),(3),(1),(2);
+ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
+CREATE TABLE t1 (pk INT PRIMARY KEY, b INT) ENGINE=SEQUENCE;
+ERROR 42S01: Table 't1' already exists
+ALTER TABLE t1 DROP COLUMN c2;
+ERROR 42000: Can't DROP COLUMN `c2`; check that it exists
+SELECT get_lock ('test', 1.5);
+get_lock ('test', 1.5)
+1
+DROP TABLE t1;

mysql-test/suite/galera/r/galera_bf_abort_get_lock.result

+connection node_2;
+connection node_1;
+CREATE TABLE t1 (f1 INTEGER PRIMARY KEY) ENGINE=InnoDB;
+connection node_2a;
+SELECT GET_LOCK("foo", 1000);
+GET_LOCK("foo", 1000)
+1
+connection node_2;
+SET AUTOCOMMIT=OFF;
+INSERT INTO t1 VALUES (1);
+SELECT GET_LOCK("foo", 1000);;
+connection node_1;
+INSERT INTO t1 VALUES (1);
+connection node_2;
+ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
+wsrep_local_aborts_increment
+1
+DROP TABLE t1;

mysql-test/suite/galera/t/MDEV-24143.test

+--source include/galera_cluster.inc
+--source include/have_sequence.inc
+
+CREATE TABLE t1 (c1 BIGINT NOT NULL PRIMARY KEY, c2 BINARY (10), c3 DATETIME);
+SELECT get_lock ('test2', 0);
+DROP TABLE t1;
+CREATE TABLE t1 (c1 SMALLINT NOT NULL AUTO_INCREMENT PRIMARY KEY);
+INSERT INTO t1 VALUES (1);
+SET SESSION wsrep_trx_fragment_size=10;
+SET SESSION autocommit=0;
+SELECT * FROM t1 WHERE c1 <=0 ORDER BY c1 DESC;
+--error ER_LOCK_DEADLOCK
+INSERT INTO t1 VALUES (4),(3),(1),(2);
+--error ER_TABLE_EXISTS_ERROR
+CREATE TABLE t1 (pk INT PRIMARY KEY, b INT) ENGINE=SEQUENCE;
+--error ER_CANT_DROP_FIELD_OR_KEY
+ALTER TABLE t1 DROP COLUMN c2;
+SELECT get_lock ('test', 1.5);
+DROP TABLE t1;
+

mysql-test/suite/galera/t/galera_bf_abort_get_lock.test

+--source include/galera_cluster.inc
+--source include/have_innodb.inc
+
+#
+# Test a local transaction being aborted by a slave one while it is running a GET_LOCK()
+#
+
+CREATE TABLE t1 (f1 INTEGER PRIMARY KEY) ENGINE=InnoDB;
+
+--let $galera_connection_name = node_2a
+--let $galera_server_number = 2
+--source include/galera_connect.inc
+--connection node_2a
+SELECT GET_LOCK("foo", 1000);
+
+--connection node_2
+SET AUTOCOMMIT=OFF;
+--let $wsrep_local_bf_aborts_before = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_bf_aborts'`
+INSERT INTO t1 VALUES (1);
+--send SELECT GET_LOCK("foo", 1000);
+
+--connection node_1
+INSERT INTO t1 VALUES (1);
+
+--connection node_2
+--error ER_LOCK_DEADLOCK
+--reap
+
+--let $wsrep_local_bf_aborts_after = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_bf_aborts'`
+
+# Check that wsrep_local_bf_aborts has been incremented by exactly 1
+--disable_query_log
+--eval SELECT $wsrep_local_bf_aborts_after - $wsrep_local_bf_aborts_before = 1 AS wsrep_local_aborts_increment;
+--enable_query_log
+
+DROP TABLE t1;