MDEV-12837: WSREP: BF lock wait long

This is 10.1 version where no merge error exists.

wsrep_on_check
        New check function. Galera can't be enabled
        if innodb-lock-schedule-algorithm=VATS.

innobase_kill_query
        In Galera async kill we could own lock mutex.

innobase_init
        If Variance-Aware-Transaction-Sheduling Algorithm (VATS) is
        used on Galera we refuse to start InnoDB.

Changed innodb-lock-schedule-algorithm as read-only parameter
as it was designed to be.

lock_rec_other_has_expl_req,
lock_rec_other_has_conflicting,
lock_rec_lock_slow
lock_table_other_has_incompatible
lock_rec_insert_check_and_lock

        Change pointer to conflicting lock to normal pointer as this
        pointer contents could be changed later.

3 files changed, 20 insertions, 2 deletions

diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc
index 8eb3d35a96e..303633939c3 100644
--- a/sql/sys_vars.cc
+++ b/sql/sys_vars.cc
@@ -4895,7 +4895,8 @@ static Sys_var_mybool Sys_wsrep_on (
        "wsrep_on", "To enable wsrep replication ",
        SESSION_VAR(wsrep_on), 
        CMD_LINE(OPT_ARG), DEFAULT(FALSE),
-       NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0),
+       NO_MUTEX_GUARD, NOT_IN_BINLOG,
+       ON_CHECK(wsrep_on_check),
        ON_UPDATE(wsrep_on_update));
 
 static Sys_var_charptr Sys_wsrep_start_position (
diff --git a/sql/wsrep_var.cc b/sql/wsrep_var.cc
index b21041eb0f8..ad1f4ec0eac 100644
--- a/sql/wsrep_var.cc
+++ b/sql/wsrep_var.cc
@@ -52,12 +52,28 @@ int wsrep_init_vars()
   return 0;
 }
 
+extern ulong innodb_lock_schedule_algorithm;
+
 bool wsrep_on_update (sys_var *self, THD* thd, enum_var_type var_type)
 {
   if (var_type == OPT_GLOBAL) {
     // FIXME: this variable probably should be changed only per session
     thd->variables.wsrep_on = global_system_variables.wsrep_on;
   }
+
+  return false;
+}
+
+bool wsrep_on_check(sys_var *self, THD* thd, set_var* var)
+{
+  bool new_wsrep_on= (bool)var->save_result.ulonglong_value;
+
+  if (new_wsrep_on && innodb_lock_schedule_algorithm != 0) {
+    my_message(ER_WRONG_ARGUMENTS, " WSREP (galera) can't be enabled "
+	    "if innodb_lock_schedule_algorithm=VATS. Please configure"
+	    " innodb_lock_schedule_algorithm=FCFS and restart.", MYF(0));
+    return true;
+  }
   return false;
 }
 
diff --git a/sql/wsrep_var.h b/sql/wsrep_var.h
index 7530fd98870..55eb2fbc501 100644
--- a/sql/wsrep_var.h
+++ b/sql/wsrep_var.h
@@ -41,7 +41,8 @@ int wsrep_init_vars();
 #define DEFAULT_ARGS (THD* thd, enum_var_type var_type)
 #define INIT_ARGS    (const char* opt)
 
-extern bool wsrep_causal_reads_update         UPDATE_ARGS;
+extern bool wsrep_causal_reads_update        UPDATE_ARGS;
+extern bool wsrep_on_check                   CHECK_ARGS;
 extern bool wsrep_on_update                  UPDATE_ARGS;
 extern bool wsrep_sync_wait_update           UPDATE_ARGS;
 extern bool wsrep_start_position_check       CHECK_ARGS;