[PKT_SCHED]: Keep backlog counter in sch_sfq

Keep backlog counter in SFQ qdisc to make it usable as child qdisc
with RED.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/sched/sch_sfq.c b/net/sched/sch_sfq.c
index 86d8da0cbd02..e057768f68b4 100644
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -232,6 +232,7 @@ static unsigned int sfq_drop(struct Qdisc *sch)
                 sfq_dec(q, x);
                 sch->q.qlen--;
                 sch->qstats.drops++;
+                sch->qstats.backlog -= len;
                 return len;
         }
 
@@ -248,6 +249,7 @@ static unsigned int sfq_drop(struct Qdisc *sch)
                 sch->q.qlen--;
                 q->ht[q->hash[d]] = SFQ_DEPTH;
                 sch->qstats.drops++;
+                sch->qstats.backlog -= len;
                 return len;
         }
 
@@ -266,6 +268,7 @@ sfq_enqueue(struct sk_buff *skb, struct Qdisc* sch)
                 q->ht[hash] = x = q->dep[SFQ_DEPTH].next;
                 q->hash[x] = hash;
         }
+        sch->qstats.backlog += skb->len;
         __skb_queue_tail(&q->qs[x], skb);
         sfq_inc(q, x);
         if (q->qs[x].qlen == 1) {               /* The flow is new */
@@ -301,6 +304,7 @@ sfq_requeue(struct sk_buff *skb, struct Qdisc* sch)
                 q->ht[hash] = x = q->dep[SFQ_DEPTH].next;
                 q->hash[x] = hash;
         }
+        sch->qstats.backlog += skb->len;
         __skb_queue_head(&q->qs[x], skb);
         sfq_inc(q, x);
         if (q->qs[x].qlen == 1) {               /* The flow is new */
@@ -344,6 +348,7 @@ sfq_dequeue(struct Qdisc* sch)
         skb = __skb_dequeue(&q->qs[a]);
         sfq_dec(q, a);
         sch->q.qlen--;
+        sch->qstats.backlog -= skb->len;
 
         /* Is the slot empty? */
         if (q->qs[a].qlen == 0) {