Function pfsync_defer

freebsd/netpfil/pf/if_pfsync.c:1749–1791

}

static int
pfsync_defer(struct pf_state *st, struct mbuf *m)
{
	struct pfsync_softc *sc = V_pfsyncif;
	struct pfsync_deferral *pd;
	struct pfsync_bucket *b = pfsync_get_bucket(sc, st);

	if (m->m_flags & (M_BCAST|M_MCAST))
		return (0);

	PFSYNC_LOCK(sc);

	if (sc == NULL || !(sc->sc_ifp->if_flags & IFF_DRV_RUNNING) ||
	    !(sc->sc_flags & PFSYNCF_DEFER)) {
		PFSYNC_UNLOCK(sc);
		return (0);
	}

	if (b->b_deferred >= 128)
		pfsync_undefer(TAILQ_FIRST(&b->b_deferrals), 0);

	pd = malloc(sizeof(*pd), M_PFSYNC, M_NOWAIT);
	if (pd == NULL)
		return (0);
	b->b_deferred++;

	m->m_flags |= M_SKIP_FIREWALL;
	st->state_flags |= PFSTATE_ACK;

	pd->pd_sc = sc;
	pd->pd_refs = 0;
	pd->pd_st = st;
	pf_ref_state(st);
	pd->pd_m = m;

	TAILQ_INSERT_TAIL(&b->b_deferrals, pd, pd_entry);
	callout_init_mtx(&pd->pd_tmo, &b->b_mtx, CALLOUT_RETURNUNLOCKED);
	callout_reset(&pd->pd_tmo, 10, pfsync_defer_tmo, pd);

	pfsync_push(b);

	return (1);
}

static void
pfsync_undefer(struct pfsync_deferral *pd, int drop)