Function lagg_link_active

freebsd/net/if_lagg.c:2213–2251

}

struct lagg_port *
lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
{
	struct lagg_port *lp_next, *rval = NULL;

	/*
	 * Search a port which reports an active link state.
	 */

#ifdef INVARIANTS
	/*
	 * This is called with either in the network epoch
	 * or with LAGG_XLOCK(sc) held.
	 */
	if (!in_epoch(net_epoch_preempt))
		LAGG_XLOCK_ASSERT(sc);
#endif

	if (lp == NULL)
		goto search;
	if (LAGG_PORTACTIVE(lp)) {
		rval = lp;
		goto found;
	}
	if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL &&
	    LAGG_PORTACTIVE(lp_next)) {
		rval = lp_next;
		goto found;
	}

search:
	CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
		if (LAGG_PORTACTIVE(lp_next)) {
			return (lp_next);
		}
	}
found:
	return (rval);
}

int
lagg_enqueue(struct ifnet *ifp, struct mbuf *m)