MDEV-13466 Implement --export option for MariaDB Backup

full server recovery is performed .
We start "mysqld" with  --bootstrap
and pass bootstrap script consisting of several FLUSH TABLES FOR export/
UNLOCK TABLES

mysql-test/suite/mariabackup/disabled.def

-partial : xtrabackup --export does not work
-xb_page_compress : xtrabackup --export does not work
+

mysql-test/suite/mariabackup/partial.result

 CREATE TABLE t1(i INT) ENGINE INNODB;
 INSERT INTO t1 VALUES(1);
+CREATE TABLE t21(i INT) ENGINE INNODB;
+INSERT INTO t21 VALUES(1);
 CREATE TABLE t2(i int) ENGINE INNODB;
 # xtrabackup backup
 t1.ibd
+t21.ibd
 # xtrabackup prepare
+t1.cfg
+t21.cfg
 ALTER TABLE t1 DISCARD TABLESPACE;
 ALTER TABLE t1 IMPORT TABLESPACE;
 SELECT * FROM t1;
@@ -11,3 +16,4 @@ i
 1
 DROP TABLE t1;
 DROP TABLE t2;
+DROP TABLE t21;

mysql-test/suite/mariabackup/partial.test

@@ -5,6 +5,9 @@
 
 CREATE TABLE t1(i INT) ENGINE INNODB;
 INSERT INTO t1 VALUES(1);
+CREATE TABLE t21(i INT) ENGINE INNODB;
+INSERT INTO t21 VALUES(1);
+
 CREATE TABLE t2(i int) ENGINE INNODB;
 
 echo # xtrabackup backup;
@@ -15,13 +18,23 @@ exec $XTRABACKUP --defaults-file=$MYSQLTEST_VARDIR/my.cnf  --backup "--tables=te
 --enable_result_log
 list_files $targetdir/test *.ibd;
 
+# Inject a junk .ibd file into backup dir to
+# see if prepare does not choke on it.
+write_file $targetdir/test/junk.ibd;
+EOF
+write_file $targetdir/test/junk.frm;
+EOF
+
+
 echo # xtrabackup prepare;
 --disable_result_log
-exec $XTRABACKUP --prepare --export --target-dir=$targetdir;
+exec $XTRABACKUP --defaults-file=$MYSQLTEST_VARDIR/my.cnf --defaults-group-suffix=.1 --prepare --export --target-dir=$targetdir;
 --enable_result_log
 
-ALTER TABLE t1 DISCARD TABLESPACE;
+list_files $targetdir/test *.cfg;
+
 let $MYSQLD_DATADIR= `select @@datadir`;
+ALTER TABLE t1 DISCARD TABLESPACE;
 copy_file $targetdir/test/t1.ibd $MYSQLD_DATADIR/test/t1.ibd;
 copy_file $targetdir/test/t1.cfg $MYSQLD_DATADIR/test/t1.cfg;
 ALTER TABLE t1 IMPORT TABLESPACE;
@@ -29,4 +42,5 @@ ALTER TABLE t1 IMPORT TABLESPACE;
 SELECT * FROM t1;
 DROP TABLE t1;
 DROP TABLE t2;
+DROP TABLE t21;
 rmdir $targetdir;

mysql-test/suite/mariabackup/xb_page_compress.test

@@ -29,7 +29,7 @@ let $targetdir=$MYSQLTEST_VARDIR/tmp/backup;
 --disable_result_log
 exec $XTRABACKUP --defaults-file=$MYSQLTEST_VARDIR/my.cnf  --backup "--tables=test.*1" --target-dir=$targetdir;
 echo # xtrabackup prepare;
-exec $XTRABACKUP --prepare --export --target-dir=$targetdir;
+exec $XTRABACKUP --defaults-file=$MYSQLTEST_VARDIR/my.cnf --defaults-group-suffix=.1 --prepare --export --target-dir=$targetdir;
 --enable_result_log
 
 ALTER TABLE t1 DISCARD TABLESPACE;

sql/mysqld.cc

@@ -4984,6 +4984,11 @@ static int init_server_components()
     help information. Since the implementation of plugin server
     variables the help output is now written much later.
   */
+#ifdef _WIN32
+  if (opt_console)
+   opt_error_log= false;
+#endif
+
   if (opt_error_log && !opt_abort)
   {
     if (!log_error_file_ptr[0])

storage/innobase/row/row0quiesce.cc

@@ -589,16 +589,18 @@ row_quiesce_table_complete(
 		++count;
 	}
 
-	/* Remove the .cfg file now that the user has resumed
-	normal operations. Otherwise it will cause problems when
-	the user tries to drop the database (remove directory). */
-	char		cfg_name[OS_FILE_MAX_PATH];
+	if (!opt_bootstrap) {
+		/* Remove the .cfg file now that the user has resumed
+		normal operations. Otherwise it will cause problems when
+		the user tries to drop the database (remove directory). */
+		char		cfg_name[OS_FILE_MAX_PATH];
 
-	srv_get_meta_data_filename(table, cfg_name, sizeof(cfg_name));
+		srv_get_meta_data_filename(table, cfg_name, sizeof(cfg_name));
 
-	os_file_delete_if_exists(innodb_data_file_key, cfg_name, NULL);
+		os_file_delete_if_exists(innodb_data_file_key, cfg_name, NULL);
 
-	ib::info() << "Deleting the meta-data file '" << cfg_name << "'";
+		ib::info() << "Deleting the meta-data file '" << cfg_name << "'";
+	}
 
 	if (trx_purge_state() != PURGE_STATE_DISABLED) {
 		trx_purge_run();