-#define TUNSETNOCSUM (('T'<< 8) | 200)
-#define TUNSETDEBUG (('T'<< 8) | 201)
-#define TUNSETIFF (('T'<< 8) | 202)
+#define TUNSETNOCSUM _IOW('T', 200, int)
+#define TUNSETDEBUG _IOW('T', 201, int)
+#define TUNSETIFF _IOW('T', 202, int)
+#define TUNSETPERSIST _IOW('T', 203, int)
+#define TUNSETOWNER _IOW('T', 204, int)