[PATCH v2 2/4] net: sched: tbf: handle GSO_BY_FRAGS case in enqueue

[Daniel Axtens]

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 <d...@axtens.net>
---
 net/sched/sch_tbf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/sched/sch_tbf.c b/net/sched/sch_tbf.c
index 229172d509cc..03225a8df973 100644
--- a/net/sched/sch_tbf.c
+++ b/net/sched/sch_tbf.c
@@ -188,7 +188,8 @@ static int tbf_enqueue(struct sk_buff *skb, struct Qdisc 
*sch,
        int ret;
 
        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 qdisc_drop(skb, sch, to_free);
        }
-- 
2.14.1