net_sched: keep backlog updated with qlen

For gso_skb we only update qlen, backlog should be updated too.

Note, it is correct to just update these stats at one layer,
because the gso_skb is cached there.

Reported-by: Stas Nichiporovich <stasn77@gmail.com>
Fixes: 2ccccf5fb43f ("net_sched: update hierarchical backlog too")
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index a1fd76c22a59..6803af17dfcf 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -691,9 +691,11 @@ static inline struct sk_buff *qdisc_peek_dequeued(struct Qdisc *sch)
         /* we can reuse ->gso_skb because peek isn't called for root qdiscs */
         if (!sch->gso_skb) {
                 sch->gso_skb = sch->dequeue(sch);
-                if (sch->gso_skb)
+                if (sch->gso_skb) {
                         /* it's still part of the queue */
+                        qdisc_qstats_backlog_inc(sch, sch->gso_skb);
                         sch->q.qlen++;
+                }
         }
 
         return sch->gso_skb;
@@ -706,6 +708,7 @@ static inline struct sk_buff *qdisc_dequeue_peeked(struct Qdisc *sch)
 
         if (skb) {
                 sch->gso_skb = NULL;
+                qdisc_qstats_backlog_dec(sch, skb);
                 sch->q.qlen--;
         } else {
                 skb = sch->dequeue(sch);