fix failures of innodb_plugin tests in --embedded

Post-fix for 7e8ed15b

Also, apply the same innodb fix to xtradb.

include/mysql/service_wsrep.h

@@ -110,6 +110,7 @@ extern struct wsrep_service_st {
   int                         (*wsrep_trx_is_aborting_func)(MYSQL_THD thd);
   int                         (*wsrep_trx_order_before_func)(MYSQL_THD, MYSQL_THD);
   void                        (*wsrep_unlock_rollback_func)();
+  void                        (*wsrep_set_data_home_dir_func)(const char *data_dir);
 } *wsrep_service;
 
 #ifdef MYSQL_DYNAMIC_PLUGIN
@@ -151,6 +152,7 @@ extern struct wsrep_service_st {
 #define wsrep_trx_is_aborting(T) wsrep_service->wsrep_trx_is_aborting_func(T)
 #define wsrep_trx_order_before(T1,T2) wsrep_service->wsrep_trx_order_before_func(T1,T2)
 #define wsrep_unlock_rollback() wsrep_service->wsrep_unlock_rollback_func()
+#define wsrep_set_data_home_dir(A) wsrep_service->wsrep_set_data_home_dir_func(A)
 
 #define wsrep_debug get_wsrep_debug()
 #define wsrep_log_conflicts get_wsrep_log_conflicts()
@@ -208,6 +210,7 @@ void wsrep_thd_awake(THD *thd, my_bool signal);
 void wsrep_thd_set_conflict_state(THD *thd, enum wsrep_conflict_state state);
 bool wsrep_thd_ignore_table(THD *thd);
 void wsrep_unlock_rollback();
+void wsrep_set_data_home_dir(const char *data_dir);
 
 #endif
 

include/service_versions.h

@@ -41,4 +41,4 @@
 #define VERSION_thd_specifics           0x0100
 #define VERSION_thd_timezone            0x0100
 #define VERSION_thd_wait                0x0100
-#define VERSION_wsrep                   0x0201
+#define VERSION_wsrep                   0x0202

sql/sql_plugin_services.ic

@@ -179,7 +179,8 @@ static struct wsrep_service_st wsrep_handler = {
   wsrep_thd_ws_handle,
   wsrep_trx_is_aborting,
   wsrep_trx_order_before,
-  wsrep_unlock_rollback
+  wsrep_unlock_rollback,
+  wsrep_set_data_home_dir
 };
 
 static struct thd_specifics_service_st thd_specifics_handler=

sql/wsrep_dummy.cc

@@ -130,3 +130,6 @@ int wsrep_trx_is_aborting(THD *)
 
 void wsrep_unlock_rollback()
 { }
+
+void wsrep_set_data_home_dir(const char *)
+{ }

sql/wsrep_mysqld.h

@@ -160,7 +160,6 @@ extern "C" time_t wsrep_thd_query_start(THD *thd);
 extern "C" query_id_t wsrep_thd_query_id(THD *thd);
 extern "C" query_id_t wsrep_thd_wsrep_last_query_id(THD *thd);
 extern "C" void wsrep_thd_set_wsrep_last_query_id(THD *thd, query_id_t id);
-extern "C" void wsrep_set_data_home_dir(const char *data_dir);
 
 extern void wsrep_close_client_connections(my_bool wait_to_end);
 extern int  wsrep_wait_committing_connections_close(int wait_time);

sql/wsrep_sst.cc

@@ -70,7 +70,6 @@ bool wsrep_sst_method_update (sys_var *self, THD* thd, enum_var_type type)
 
 static const char* data_home_dir = NULL;
 
-extern "C"
 void wsrep_set_data_home_dir(const char *data_dir)
 {
   data_home_dir= (data_dir && *data_dir) ? data_dir : NULL;

storage/xtradb/handler/ha_innodb.cc

@@ -4072,6 +4072,11 @@ innobase_init(
 	srv_data_home = (innobase_data_home_dir ? innobase_data_home_dir :
 			 default_path);
 
+#ifdef WITH_WSREP
+	/* If we use the wsrep API, then we need to tell the server
+	the path to the data files (for passing it to the SST scripts): */
+	wsrep_set_data_home_dir(innobase_data_home_dir);
+#endif /* WITH_WSREP */
 
 	/* Set default InnoDB data file size to 12 MB and let it be
 	auto-extending. Thus users can use InnoDB in >= 4.0 without having