PF_INOUT
if (r.direction != PF_INOUT) {
dir : /* empty */ { $$ = PF_INOUT; }
if (r->direction == PF_INOUT) {
if (r->direction != PF_INOUT) {
if (super->direction == PF_INOUT)
sub->direction = PF_INOUT;
if (s && dndir == PF_INOUT) {
} else if (dndir == PF_INOUT) {
case PF_INOUT:
case PF_INOUT: