generic/571: skip test on filesystems that don't support F_SETLEASE fcntl

Add an option to the locktest program to check for fcntl setlease
support, and skip the generic/571 test on filesystems where the
check returns EINVAL.

Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Reviewed-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>

common/rc

@@ -3501,6 +3501,14 @@ _require_test_fcntl_advisory_locks()
 		_notrun "Require fcntl advisory locks support"
 }
 
+_require_test_fcntl_setlease()
+{
+	_require_test_program "locktest"
+	touch $TEST_DIR/setlease_testfile
+	$here/src/locktest -t $TEST_DIR/setlease_testfile >/dev/null 2>&1
+	[ $? -eq 22 ] && _notrun "Require fcntl setlease support"
+}
+
 _require_ofd_locks()
 {
 	# Give a test run by getlk wrlck on testfile.