Commit ee78bbef authored Mar 01, 2018 by Daniel Axtens Committed by David S. Miller Mar 04, 2018

net: sched: tbf: handle GSO_BY_FRAGS case in enqueue



tbf_enqueue() checks the size of a packet before enqueuing it.
However, the GSO size check does not consider the GSO_BY_FRAGS
case, and so will drop GSO SCTP packets, causing a massive drop
in throughput.

Use skb_gso_validate_mac_len() instead, as it does consider that
case.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 779b7931

net/sched/sch_tbf.c

+2 −1

Original line number	Original line	Diff line number	Diff line
	@@ -188,7 +188,8 @@ static int tbf_enqueue(struct sk_buff skb, struct Qdisc sch,
	int ret;		int ret;

	if (qdisc_pkt_len(skb) > q->max_size) {		if (qdisc_pkt_len(skb) > q->max_size) {
	if (skb_is_gso(skb) && skb_gso_mac_seglen(skb) <= q->max_size)		if (skb_is_gso(skb) &&
			skb_gso_validate_mac_len(skb, q->max_size))
	return tbf_segment(skb, sch, to_free);		return tbf_segment(skb, sch, to_free);
	return qdisc_drop(skb, sch, to_free);		return qdisc_drop(skb, sch, to_free);
	}		}