[PATCH 3.2 160/199] sch_dsmark: update backlog as well

[Ben Hutchings]

3.2.87-rc1 review patch.  If anyone has any objections, please let me know.

------------------

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

[ Upstream commit bdf17661f63a79c3cb4209b970b1cc39e34f7543 ]

Similarly, we need to update backlog too when we update qlen.

Cc: Jamal Hadi Salim <j...@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
[bwh: Backported to 3.2: open-code qdisc_qstats_backlog_{inc,dec}()]
Signed-off-by: Ben Hutchings <b...@decadent.org.uk>
---
 net/sched/sch_dsmark.c | 3 +++
 1 file changed, 3 insertions(+)

--- a/net/sched/sch_dsmark.c
+++ b/net/sched/sch_dsmark.c
@@ -260,6 +260,7 @@ static int dsmark_enqueue(struct sk_buff
                return err;
        }
 
+       sch->qstats.backlog += qdisc_pkt_len(skb);
        sch->q.qlen++;
 
        return NET_XMIT_SUCCESS;
@@ -283,6 +284,7 @@ static struct sk_buff *dsmark_dequeue(st
                return NULL;
 
        qdisc_bstats_update(sch, skb);
+       sch->qstats.backlog -= qdisc_pkt_len(skb);
        sch->q.qlen--;
 
        index = skb->tc_index & (p->indices - 1);
@@ -398,6 +400,7 @@ static void dsmark_reset(struct Qdisc *s
 
        pr_debug("dsmark_reset(sch %p,[qdisc %p])\n", sch, p);
        qdisc_reset(p->q);
+       sch->qstats.backlog = 0;
        sch->q.qlen = 0;
 }