Ejemplos de choke_match_random en C++ (Cpp)

Ejemplo n.º 1

Archivo: sch_choke.c Proyecto: adyjl/DORIMANX_LG_STOCK_LP_KERNEL

static int choke_enqueue(struct sk_buff *skb, struct Qdisc *sch)
{
	struct choke_sched_data *q = qdisc_priv(sch);
	const struct red_parms *p = &q->parms;
	int ret = NET_XMIT_SUCCESS | __NET_XMIT_BYPASS;

	if (q->filter_list) {
		/* If using external classifiers, get result and record it. */
		if (!choke_classify(skb, sch, &ret))
			goto other_drop;	/* Packet was eaten by filter */
	}

	choke_skb_cb(skb)->keys_valid = 0;
	/* Compute average queue usage (see RED) */
	q->vars.qavg = red_calc_qavg(p, &q->vars, sch->q.qlen);
	if (red_is_idling(&q->vars))
		red_end_of_idle_period(&q->vars);

	/* Is queue small? */
	if (q->vars.qavg <= p->qth_min)
		q->vars.qcount = -1;
	else {
		unsigned int idx;

		/* Draw a packet at random from queue and compare flow */
		if (choke_match_random(q, skb, &idx)) {
			q->stats.matched++;
			choke_drop_by_idx(sch, idx);
			goto congestion_drop;
		}

		/* Queue is large, always mark/drop */
		if (q->vars.qavg > p->qth_max) {
			q->vars.qcount = -1;

			sch->qstats.overlimits++;
			if (use_harddrop(q) || !use_ecn(q) ||
			    !INET_ECN_set_ce(skb)) {
				q->stats.forced_drop++;
				goto congestion_drop;
			}

			q->stats.forced_mark++;
		} else if (++q->vars.qcount) {
			if (red_mark_probability(p, &q->vars, q->vars.qavg)) {
				q->vars.qcount = 0;
				q->vars.qR = red_random(p);

				sch->qstats.overlimits++;
				if (!use_ecn(q) || !INET_ECN_set_ce(skb)) {
					q->stats.prob_drop++;
					goto congestion_drop;
				}

				q->stats.prob_mark++;
			}
		} else
			q->vars.qR = red_random(p);
	}

	/* Admit new packet */
	if (sch->q.qlen < q->limit) {
		q->tab[q->tail] = skb;
		q->tail = (q->tail + 1) & q->tab_mask;
		++sch->q.qlen;
		sch->qstats.backlog += qdisc_pkt_len(skb);
		return NET_XMIT_SUCCESS;
	}

	q->stats.pdrop++;
	sch->qstats.drops++;
	kfree_skb(skb);
	return NET_XMIT_DROP;

 congestion_drop:
	qdisc_drop(skb, sch);
	return NET_XMIT_CN;

 other_drop:
	if (ret & __NET_XMIT_BYPASS)
		sch->qstats.drops++;
	kfree_skb(skb);
	return ret;
}

Ejemplo n.º 2

Archivo: sch_choke.c Proyecto: AlexShiLucky/linux

static int choke_enqueue(struct sk_buff *skb, struct Qdisc *sch,
			 struct sk_buff **to_free)
{
	struct choke_sched_data *q = qdisc_priv(sch);
	const struct red_parms *p = &q->parms;

	choke_skb_cb(skb)->keys_valid = 0;
	/* Compute average queue usage (see RED) */
	q->vars.qavg = red_calc_qavg(p, &q->vars, sch->q.qlen);
	if (red_is_idling(&q->vars))
		red_end_of_idle_period(&q->vars);

	/* Is queue small? */
	if (q->vars.qavg <= p->qth_min)
		q->vars.qcount = -1;
	else {
		unsigned int idx;

		/* Draw a packet at random from queue and compare flow */
		if (choke_match_random(q, skb, &idx)) {
			q->stats.matched++;
			choke_drop_by_idx(sch, idx, to_free);
			goto congestion_drop;
		}

		/* Queue is large, always mark/drop */
		if (q->vars.qavg > p->qth_max) {
			q->vars.qcount = -1;

			qdisc_qstats_overlimit(sch);
			if (use_harddrop(q) || !use_ecn(q) ||
			    !INET_ECN_set_ce(skb)) {
				q->stats.forced_drop++;
				goto congestion_drop;
			}

			q->stats.forced_mark++;
		} else if (++q->vars.qcount) {
			if (red_mark_probability(p, &q->vars, q->vars.qavg)) {
				q->vars.qcount = 0;
				q->vars.qR = red_random(p);

				qdisc_qstats_overlimit(sch);
				if (!use_ecn(q) || !INET_ECN_set_ce(skb)) {
					q->stats.prob_drop++;
					goto congestion_drop;
				}

				q->stats.prob_mark++;
			}
		} else
			q->vars.qR = red_random(p);
	}

	/* Admit new packet */
	if (sch->q.qlen < q->limit) {
		q->tab[q->tail] = skb;
		q->tail = (q->tail + 1) & q->tab_mask;
		++sch->q.qlen;
		qdisc_qstats_backlog_inc(sch, skb);
		return NET_XMIT_SUCCESS;
	}

	q->stats.pdrop++;
	return qdisc_drop(skb, sch, to_free);

congestion_drop:
	qdisc_drop(skb, sch, to_free);
	return NET_XMIT_CN;
}