test/zdtm: add option -r to run test with specified name

The option can run test with specified name directly without check
or match.

It can be used to run experimental test that is not in TEST_LIST.
Signed-off-by: Yicheng Qin <yichengq@google.com>
Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -158,6 +158,7 @@ PS_PORT=12345
 TCPDUMP_PID=
 COMPILE_ONLY=0
 BATCH_TEST=0
+SPECIFIED_NAME_USED=0
 
 check_criu()
 {
@@ -658,6 +659,11 @@ while :; do
 		shift
 		continue
 	fi
+	if [ "$1" = "-r" ]; then
+		SPECIFIED_NAME_USED=1
+		shift
+		continue
+	fi
 	break;
 done
 
@@ -685,9 +691,16 @@ Options:
 	-a <FILE>.tar.gz : save archive with dump files and logs
 	-g : Generate executables only
 	-n : Batch test
+	-r : Run test with specified name directly without match or check
 EOF
 elif [ "${1:0:1}" = '-' ]; then
 	echo "unrecognized option $1"
+elif [ $SPECIFIED_NAME_USED -eq 1 ]; then
+	if [ $# -eq 0 ]; then
+		echo "test name should be provided"
+		exit 1
+	fi
+	run_test $1 || case_error $t
 else
 	if [ $COMPILE_ONLY -eq 0 ]; then
 		check_mainstream || exit 1