ENTITY_MAC
if (smc->e.trace_prop & ENTITY_BIT(ENTITY_MAC)) {
if (smc->e.trace_prop & ENTITY_BIT(ENTITY_MAC)) {
initiator = ENTITY_MAC ;
smc->e.trace_prop &= ~ENTITY_BIT(ENTITY_MAC) ;
if (upstream == ENTITY_MAC) {
smc->e.trace_prop |= ENTITY_BIT(ENTITY_MAC) ;
return entity_to_index(smc, cem_get_downstream(smc, ENTITY_MAC));
if (e == ENTITY_MAC)