Bug #42217 mysql.procs_priv does not get replicated

mysql.procs_priv table itself does not get replicated.
Inserting routine privilege record into mysql.procs_priv table
is triggered by creating function/procedure statements
according to current user's privileges.
Because the current user of SQL thread has GLOBAL_ACL,
which doesn't need any check mysql.procs_priv privilege
when create/alter/execute routines.
Corresponding GLOBAL_ACL privilege user
doesn't insert routine privilege record into
mysql.procs_priv when creating a routine.

Fixed by switching the current user of SQL thread to definer user if
the definer user exists on slave.
That populates procs_priv, otherwise to keep the SQL thread
user and procs_priv remains unchanged.


mysql-test/suite/rpl/r/rpl_do_grant.result:
  Test case result for routine privilege when definer user exist or not on slave
mysql-test/suite/rpl/t/rpl_do_grant.test:
  Test case result for routine privilege when definer user exist or not on slave
sql/sql_parse.cc:
  Switch current user of SQL thread to definer user if the definer user
  existes on slave when checking whether the routine privilege is
  needed to insert mysql.procs_priv table or not.

mysql-test/suite/rpl/r/rpl_do_grant.result

@@ -89,3 +89,81 @@ show grants for rpl_do_grant2@localhost;
 ERROR 42000: There is no such grant defined for user 'rpl_do_grant2' on host 'localhost'
 show grants for rpl_do_grant2@localhost;
 ERROR 42000: There is no such grant defined for user 'rpl_do_grant2' on host 'localhost'
+DROP DATABASE IF EXISTS bug42217_db;
+CREATE DATABASE  bug42217_db;
+GRANT CREATE ROUTINE ON bug42217_db.* TO 'create_rout_db'@'localhost'
+        IDENTIFIED BY 'create_rout_db' WITH GRANT OPTION;
+USE bug42217_db;
+CREATE FUNCTION upgrade_del_func() RETURNS CHAR(30)
+BEGIN
+RETURN "INSIDE upgrade_del_func()";
+END//
+USE bug42217_db;
+SELECT * FROM mysql.procs_priv;
+Host	Db	User	Routine_name	Routine_type	Grantor	Proc_priv	Timestamp
+localhost	bug42217_db	create_rout_db	upgrade_del_func	FUNCTION	create_rout_db@localhost	Execute,Alter Routine	#
+SELECT upgrade_del_func();
+upgrade_del_func()
+INSIDE upgrade_del_func()
+SELECT * FROM mysql.procs_priv;
+Host	Db	User	Routine_name	Routine_type	Grantor	Proc_priv	Timestamp
+localhost	bug42217_db	create_rout_db	upgrade_del_func	FUNCTION	create_rout_db@localhost	Execute,Alter Routine	#
+SHOW GRANTS FOR 'create_rout_db'@'localhost';
+Grants for create_rout_db@localhost
+GRANT USAGE ON *.* TO 'create_rout_db'@'localhost' IDENTIFIED BY PASSWORD '*08792480350CBA057BDE781B9DF183B263934601'
+GRANT CREATE ROUTINE ON `bug42217_db`.* TO 'create_rout_db'@'localhost' WITH GRANT OPTION
+GRANT EXECUTE, ALTER ROUTINE ON FUNCTION `bug42217_db`.`upgrade_del_func` TO 'create_rout_db'@'localhost'
+USE bug42217_db;
+SHOW CREATE FUNCTION upgrade_del_func;
+Function	sql_mode	Create Function	character_set_client	collation_connection	Database Collation
+upgrade_del_func		CREATE DEFINER=`create_rout_db`@`localhost` FUNCTION `upgrade_del_func`() RETURNS char(30) CHARSET latin1
+BEGIN
+RETURN "INSIDE upgrade_del_func()";
+END	latin1	latin1_swedish_ci	latin1_swedish_ci
+SELECT upgrade_del_func();
+upgrade_del_func()
+INSIDE upgrade_del_func()
+"Check whether the definer user will be able to execute the replicated routine on slave"
+USE bug42217_db;
+SHOW CREATE FUNCTION upgrade_del_func;
+Function	sql_mode	Create Function	character_set_client	collation_connection	Database Collation
+upgrade_del_func		CREATE DEFINER=`create_rout_db`@`localhost` FUNCTION `upgrade_del_func`() RETURNS char(30) CHARSET latin1
+BEGIN
+RETURN "INSIDE upgrade_del_func()";
+END	latin1	latin1_swedish_ci	latin1_swedish_ci
+SELECT upgrade_del_func();
+upgrade_del_func()
+INSIDE upgrade_del_func()
+DELETE FROM mysql.procs_priv;
+FLUSH PRIVILEGES;
+USE bug42217_db;
+"Can't execute the replicated routine on slave like before after procs privilege is deleted "
+SELECT upgrade_del_func();
+ERROR 42000: execute command denied to user 'create_rout_db'@'localhost' for routine 'bug42217_db.upgrade_del_func'
+"Test the user who creates a function on master doesn't exist on slave."
+"Hence SQL thread ACL_GLOBAL privilege jumps in and no mysql.procs_priv is inserted"
+DROP USER 'create_rout_db'@'localhost';
+CREATE FUNCTION upgrade_alter_func() RETURNS CHAR(30)
+BEGIN
+RETURN "INSIDE upgrade_alter_func()";
+END//
+SELECT upgrade_alter_func();
+upgrade_alter_func()
+INSIDE upgrade_alter_func()
+SHOW CREATE FUNCTION upgrade_alter_func;
+Function	sql_mode	Create Function	character_set_client	collation_connection	Database Collation
+upgrade_alter_func		CREATE DEFINER=`create_rout_db`@`localhost` FUNCTION `upgrade_alter_func`() RETURNS char(30) CHARSET latin1
+BEGIN
+RETURN "INSIDE upgrade_alter_func()";
+END	latin1	latin1_swedish_ci	latin1_swedish_ci
+"Should no privilege record for upgrade_alter_func in mysql.procs_priv"
+SELECT * FROM mysql.procs_priv;
+Host	Db	User	Routine_name	Routine_type	Grantor	Proc_priv	Timestamp
+SELECT upgrade_alter_func();
+ERROR HY000: The user specified as a definer ('create_rout_db'@'localhost') does not exist
+USE bug42217_db;
+DROP FUNCTION upgrade_del_func;
+DROP FUNCTION upgrade_alter_func;
+DROP DATABASE bug42217_db;
+DROP USER 'create_rout_db'@'localhost';
+"End of test"

mysql-test/suite/rpl/t/rpl_do_grant.test

@@ -112,3 +112,100 @@ show grants for rpl_do_grant2@localhost;
 sync_slave_with_master;
 --error 1141
 show grants for rpl_do_grant2@localhost;
+
+#####################################################
+# Purpose
+# Test whether mysql.procs_priv get replicated 
+# Related bugs:
+# BUG42217  mysql.procs_priv does not get replicated
+#####################################################
+connection master; 
+
+--disable_warnings
+DROP DATABASE IF EXISTS bug42217_db;
+--enable_warnings
+CREATE DATABASE  bug42217_db;
+
+GRANT CREATE ROUTINE ON bug42217_db.* TO 'create_rout_db'@'localhost'
+        IDENTIFIED BY 'create_rout_db' WITH GRANT OPTION;
+
+connect (create_rout_db_master, localhost, create_rout_db, create_rout_db, bug42217_db,$MASTER_MYPORT,);
+connect (create_rout_db_slave, localhost, create_rout_db, create_rout_db, bug42217_db, $SLAVE_MYPORT,);
+
+connection create_rout_db_master;
+
+
+USE bug42217_db;
+
+DELIMITER //;
+CREATE FUNCTION upgrade_del_func() RETURNS CHAR(30)
+BEGIN
+   RETURN "INSIDE upgrade_del_func()";
+END//
+
+DELIMITER ;//
+
+connection master;
+
+USE bug42217_db;
+--replace_column 8 #
+SELECT * FROM mysql.procs_priv;
+SELECT upgrade_del_func();
+
+sync_slave_with_master;
+--replace_column 8 #
+SELECT * FROM mysql.procs_priv;
+SHOW GRANTS FOR 'create_rout_db'@'localhost';
+
+USE bug42217_db;
+SHOW CREATE FUNCTION upgrade_del_func;
+SELECT upgrade_del_func();
+
+--echo "Check whether the definer user will be able to execute the replicated routine on slave"
+connection create_rout_db_slave;
+USE bug42217_db;
+SHOW CREATE FUNCTION upgrade_del_func;
+SELECT upgrade_del_func();
+
+connection slave;
+DELETE FROM mysql.procs_priv;
+FLUSH PRIVILEGES;
+USE bug42217_db;
+--echo "Can't execute the replicated routine on slave like before after procs privilege is deleted "
+--error 1370
+SELECT upgrade_del_func();
+
+--echo "Test the user who creates a function on master doesn't exist on slave."
+--echo "Hence SQL thread ACL_GLOBAL privilege jumps in and no mysql.procs_priv is inserted"
+DROP USER 'create_rout_db'@'localhost';
+
+connection create_rout_db_master;
+DELIMITER //;
+CREATE FUNCTION upgrade_alter_func() RETURNS CHAR(30)
+BEGIN
+   RETURN "INSIDE upgrade_alter_func()";
+END//
+DELIMITER ;//
+
+connection master;
+SELECT upgrade_alter_func();
+
+sync_slave_with_master;
+SHOW CREATE FUNCTION upgrade_alter_func;
+--echo "Should no privilege record for upgrade_alter_func in mysql.procs_priv"
+--replace_column 8 #
+SELECT * FROM mysql.procs_priv;
+--error 1449
+SELECT upgrade_alter_func();
+
+###### CLEAN UP SECTION ##############
+disconnect create_rout_db_master;
+disconnect create_rout_db_slave;
+connection master;
+USE bug42217_db;
+DROP FUNCTION upgrade_del_func;
+DROP FUNCTION upgrade_alter_func;
+DROP DATABASE bug42217_db;
+DROP USER 'create_rout_db'@'localhost';
+ 
+--echo "End of test"

sql/sql_parse.cc

@@ -4129,9 +4129,32 @@ mysql_execute_command(THD *thd)
 
     res= (sp_result= lex->sphead->create(thd));
     switch (sp_result) {
-    case SP_OK:
+    case SP_OK: {
 #ifndef NO_EMBEDDED_ACCESS_CHECKS
       /* only add privileges if really neccessary */
+
+      Security_context security_context;
+      bool restore_backup_context= false;
+      Security_context *backup= NULL;
+      LEX_USER *definer= thd->lex->definer;
+      /*
+        Check if the definer exists on slave, 
+        then use definer privilege to insert routine privileges to mysql.procs_priv.
+
+        For current user of SQL thread has GLOBAL_ACL privilege, 
+        which doesn't any check routine privileges, 
+        so no routine privilege record  will insert into mysql.procs_priv.
+      */
+      if (thd->slave_thread && is_acl_user(definer->host.str, definer->user.str))
+      {
+        security_context.change_security_context(thd, 
+                                                 &thd->lex->definer->user,
+                                                 &thd->lex->definer->host,
+                                                 &thd->lex->sphead->m_db,
+                                                 &backup);
+        restore_backup_context= true;
+      }
+
       if (sp_automatic_privileges && !opt_noacl &&
           check_routine_access(thd, DEFAULT_CREATE_PROC_ACLS,
                                lex->sphead->m_db.str, name,
@@ -4143,8 +4166,19 @@ mysql_execute_command(THD *thd)
                        ER_PROC_AUTO_GRANT_FAIL,
                        ER(ER_PROC_AUTO_GRANT_FAIL));
       }
+
+      /*
+        Restore current user with GLOBAL_ACL privilege of SQL thread
+      */ 
+      if (restore_backup_context)
+      {
+        DBUG_ASSERT(thd->slave_thread == 1);
+        thd->security_ctx->restore_security_context(thd, backup);
+      }
+
 #endif
     break;
+    }
     case SP_WRITE_ROW_FAILED:
       my_error(ER_SP_ALREADY_EXISTS, MYF(0), SP_TYPE_STRING(lex), name);
     break;