static int sfq_dump_class_stats(struct Qdisc *sch, unsigned long cl,
				struct gnet_dump *d)
{
	struct sfq_sched_data *q = qdisc_priv(sch);
	sfq_index idx = q->ht[cl - 1];
	struct gnet_stats_queue qs = { 0 };
	struct tc_sfq_xstats xstats = { 0 };

	if (idx != SFQ_EMPTY_SLOT) {
		const struct sfq_slot *slot = &q->slots[idx];

		xstats.allot = slot->allot << SFQ_ALLOT_SHIFT;
		qs.qlen = slot->qlen;
		qs.backlog = slot->backlog;
	}
	if (gnet_stats_copy_queue(d, NULL, &qs, qs.qlen) < 0)
		return -1;
	return gnet_stats_copy_app(d, &xstats, sizeof(xstats));
}
static int sfq_dump_class_stats(struct Qdisc *sch, unsigned long cl,
				struct gnet_dump *d)
{
	struct sfq_sched_data *q = qdisc_priv(sch);
	sfq_index idx = q->ht[cl - 1];
	struct gnet_stats_queue qs = { 0 };
	struct tc_sfq_xstats xstats = { 0 };

	if (idx != SFQ_EMPTY_SLOT) {
		const struct sfq_slot *slot = &q->slots[idx];

		xstats.allot = slot->allot << SFQ_ALLOT_SHIFT;
		qs.qlen = slot->qlen;
		qs.backlog = slot->backlog;
	}
	if (gnet_stats_copy_queue(d, NULL, &qs, qs.qlen) < 0)
		return -1;
	return gnet_stats_copy_app(d, &xstats, sizeof(xstats));
}