Function carp_sc_state

freebsd/netinet/ip_carp.c:2070–2098

}

static void
carp_sc_state(struct carp_softc *sc)
{

	CARP_LOCK_ASSERT(sc);

	if (sc->sc_carpdev->if_link_state != LINK_STATE_UP ||
	    !(sc->sc_carpdev->if_flags & IFF_UP) ||
	    !V_carp_allow) {
		callout_stop(&sc->sc_ad_tmo);
#ifdef INET
		callout_stop(&sc->sc_md_tmo);
#endif
#ifdef INET6
		callout_stop(&sc->sc_md6_tmo);
#endif
		carp_set_state(sc, INIT, "hardware interface down");
		carp_setrun(sc, 0);
		if (!sc->sc_suppress)
			carp_demote_adj(V_carp_ifdown_adj, "interface down");
		sc->sc_suppress = 1;
	} else {
		carp_set_state(sc, INIT, "hardware interface up");
		carp_setrun(sc, 0);
		if (sc->sc_suppress)
			carp_demote_adj(-V_carp_ifdown_adj, "interface up");
		sc->sc_suppress = 0;
	}
}

static void
carp_demote_adj(int adj, char *reason)