C++ (Cpp) fq_dequeue Examples

Example #1

File: sch_fq.c Project: AK101111/linux

static int fq_change(struct Qdisc *sch, struct nlattr *opt)
{
	struct fq_sched_data *q = qdisc_priv(sch);
	struct nlattr *tb[TCA_FQ_MAX + 1];
	int err, drop_count = 0;
	unsigned drop_len = 0;
	u32 fq_log;

	if (!opt)
		return -EINVAL;

	err = nla_parse_nested(tb, TCA_FQ_MAX, opt, fq_policy);
	if (err < 0)
		return err;

	sch_tree_lock(sch);

	fq_log = q->fq_trees_log;

	if (tb[TCA_FQ_BUCKETS_LOG]) {
		u32 nval = nla_get_u32(tb[TCA_FQ_BUCKETS_LOG]);

		if (nval >= 1 && nval <= ilog2(256*1024))
			fq_log = nval;
		else
			err = -EINVAL;
	}
	if (tb[TCA_FQ_PLIMIT])
		sch->limit = nla_get_u32(tb[TCA_FQ_PLIMIT]);

	if (tb[TCA_FQ_FLOW_PLIMIT])
		q->flow_plimit = nla_get_u32(tb[TCA_FQ_FLOW_PLIMIT]);

	if (tb[TCA_FQ_QUANTUM]) {
		u32 quantum = nla_get_u32(tb[TCA_FQ_QUANTUM]);

		if (quantum > 0)
			q->quantum = quantum;
		else
			err = -EINVAL;
	}

	if (tb[TCA_FQ_INITIAL_QUANTUM])
		q->initial_quantum = nla_get_u32(tb[TCA_FQ_INITIAL_QUANTUM]);

	if (tb[TCA_FQ_FLOW_DEFAULT_RATE])
		pr_warn_ratelimited("sch_fq: defrate %u ignored.\n",
				    nla_get_u32(tb[TCA_FQ_FLOW_DEFAULT_RATE]));

	if (tb[TCA_FQ_FLOW_MAX_RATE])
		q->flow_max_rate = nla_get_u32(tb[TCA_FQ_FLOW_MAX_RATE]);

	if (tb[TCA_FQ_RATE_ENABLE]) {
		u32 enable = nla_get_u32(tb[TCA_FQ_RATE_ENABLE]);

		if (enable <= 1)
			q->rate_enable = enable;
		else
			err = -EINVAL;
	}

	if (tb[TCA_FQ_FLOW_REFILL_DELAY]) {
		u32 usecs_delay = nla_get_u32(tb[TCA_FQ_FLOW_REFILL_DELAY]) ;

		q->flow_refill_delay = usecs_to_jiffies(usecs_delay);
	}

	if (tb[TCA_FQ_ORPHAN_MASK])
		q->orphan_mask = nla_get_u32(tb[TCA_FQ_ORPHAN_MASK]);

	if (!err) {
		sch_tree_unlock(sch);
		err = fq_resize(sch, fq_log);
		sch_tree_lock(sch);
	}
	while (sch->q.qlen > sch->limit) {
		struct sk_buff *skb = fq_dequeue(sch);

		if (!skb)
			break;
		drop_len += qdisc_pkt_len(skb);
		rtnl_kfree_skbs(skb, skb);
		drop_count++;
	}
	qdisc_tree_reduce_backlog(sch, drop_count, drop_len);

	sch_tree_unlock(sch);
	return err;
}

Example #2

File: sch_fq.c Project: OliverGesch/linux

static int fq_change(struct Qdisc *sch, struct nlattr *opt)
{
	struct fq_sched_data *q = qdisc_priv(sch);
	struct nlattr *tb[TCA_FQ_MAX + 1];
	int err, drop_count = 0;
	u32 fq_log;

	if (!opt)
		return -EINVAL;

	err = nla_parse_nested(tb, TCA_FQ_MAX, opt, fq_policy);
	if (err < 0)
		return err;

	sch_tree_lock(sch);

	fq_log = q->fq_trees_log;

	if (tb[TCA_FQ_BUCKETS_LOG]) {
		u32 nval = nla_get_u32(tb[TCA_FQ_BUCKETS_LOG]);

		if (nval >= 1 && nval <= ilog2(256*1024))
			fq_log = nval;
		else
			err = -EINVAL;
	}
	if (tb[TCA_FQ_PLIMIT])
		sch->limit = nla_get_u32(tb[TCA_FQ_PLIMIT]);

	if (tb[TCA_FQ_FLOW_PLIMIT])
		q->flow_plimit = nla_get_u32(tb[TCA_FQ_FLOW_PLIMIT]);

	if (tb[TCA_FQ_QUANTUM])
		q->quantum = nla_get_u32(tb[TCA_FQ_QUANTUM]);

	if (tb[TCA_FQ_INITIAL_QUANTUM])
		q->initial_quantum = nla_get_u32(tb[TCA_FQ_INITIAL_QUANTUM]);

	if (tb[TCA_FQ_FLOW_DEFAULT_RATE])
		q->flow_default_rate = nla_get_u32(tb[TCA_FQ_FLOW_DEFAULT_RATE]);

	if (tb[TCA_FQ_FLOW_MAX_RATE])
		q->flow_max_rate = nla_get_u32(tb[TCA_FQ_FLOW_MAX_RATE]);

	if (tb[TCA_FQ_RATE_ENABLE]) {
		u32 enable = nla_get_u32(tb[TCA_FQ_RATE_ENABLE]);

		if (enable <= 1)
			q->rate_enable = enable;
		else
			err = -EINVAL;
	}

	if (!err)
		err = fq_resize(q, fq_log);

	while (sch->q.qlen > sch->limit) {
		struct sk_buff *skb = fq_dequeue(sch);

		if (!skb)
			break;
		kfree_skb(skb);
		drop_count++;
	}
	qdisc_tree_decrease_qlen(sch, drop_count);

	sch_tree_unlock(sch);
	return err;
}