[PATCH AUTOSEL 4.4 31/65] sch_red: update backlog as well

Sasha Levin
2018-10-25T14:18:02Z

From: WANG Cong <xiyou.wangcong@gmail.com>

[ Upstream commit d7f4f332f082c4d4ba53582f902ed6b44fd6f45e ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/sched/sch_red.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index 0505b8408c8b..4bf2b599ef98 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -97,6 +97,7 @@ static int red_enqueue(struct sk_buff *skb, struct Qdisc *sch)

ret = qdisc_enqueue(skb, child);
if (likely(ret == NET_XMIT_SUCCESS)) {
+ qdisc_qstats_backlog_inc(sch, skb);
sch->q.qlen++;
} else if (net_xmit_drop_count(ret)) {
q->stats.pdrop++;
@@ -118,6 +119,7 @@ static struct sk_buff *red_dequeue(struct Qdisc *sch)
skb = child->dequeue(child);
if (skb) {
qdisc_bstats_update(sch, skb);
+ qdisc_qstats_backlog_dec(sch, skb);
sch->q.qlen--;
} else {
if (!red_is_idling(&q->vars))
@@ -143,6 +145,7 @@ static unsigned int red_drop(struct Qdisc *sch)
if (child->ops->drop && (len = child->ops->drop(child)) > 0) {
q->stats.other++;
qdisc_qstats_drop(sch);
+ sch->qstats.backlog -= len;
sch->q.qlen--;
return len;
}
@@ -158,6 +161,7 @@ static void red_reset(struct Qdisc *sch)
struct red_sched_data *q = qdisc_priv(sch);

qdisc_reset(q->qdisc);
+ sch->qstats.backlog = 0;
sch->q.qlen = 0;
red_restart(&q->vars);
}
--
2.17.1