V_set_disable
if (V_set_disable & (1 << f->set) )
(V_set_disable &
(V_set_disable &
if (rule != NULL && (V_set_disable & (1 << rule->set))) {
v_set = (V_set_disable | rt->set) & ~rt->new_set;
V_set_disable = v_set;
hdr->set_mask = ~V_set_disable;