Function carp_set_state

freebsd/netinet/ip_carp.c:2034–2054

}

static void
carp_set_state(struct carp_softc *sc, int state, const char *reason)
{

	CARP_LOCK_ASSERT(sc);

	if (sc->sc_state != state) {
		const char *carp_states[] = { CARP_STATES };
		char subsys[IFNAMSIZ+5];

		snprintf(subsys, IFNAMSIZ+5, "%u@%s", sc->sc_vhid,
		    sc->sc_carpdev->if_xname);

		CARP_LOG("%s: %s -> %s (%s)\n", subsys,
		    carp_states[sc->sc_state], carp_states[state], reason);

		sc->sc_state = state;

		devctl_notify("CARP", subsys, carp_states[state], NULL);
	}
}

static void
carp_linkstate(struct ifnet *ifp)