Function lagg_watchdog_infiniband

freebsd/net/if_lagg.c:1210–1250

}

static void
lagg_watchdog_infiniband(void *arg)
{
	struct epoch_tracker et;
	struct lagg_softc *sc;
	struct lagg_port *lp;
	struct ifnet *ifp;
	struct ifnet *lp_ifp;

	sc = arg;

	/*
	 * Because infiniband nodes have a fixed MAC address, which is
	 * generated by the so-called GID, we need to regularly update
	 * the link level address of the parent lagg<N> device when
	 * the active port changes. Possibly we could piggy-back on
	 * link up/down events aswell, but using a timer also provides
	 * a guarantee against too frequent events. This operation
	 * does not have to be atomic.
	 */
	NET_EPOCH_ENTER(et);
	lp = lagg_link_active(sc, sc->sc_primary);
	if (lp != NULL) {
		ifp = sc->sc_ifp;
		lp_ifp = lp->lp_ifp;

		if (ifp != NULL && lp_ifp != NULL &&
		    (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 ||
		     memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) {
			memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen);
			memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen);

			CURVNET_SET(ifp->if_vnet);
			EVENTHANDLER_INVOKE(iflladdr_event, ifp);
			CURVNET_RESTORE();
		}
	}
	NET_EPOCH_EXIT(et);

	callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg);
}

static void
lagg_init(void *xsc)