net_sched: update bstats in dequeue()

Class bytes/packets stats can be misleading because they are updated in
enqueue() while packet might be dropped later.

We already fixed all qdiscs but sch_atm.

This patch makes the final cleanup.

class rate estimators can now match qdisc ones.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/sch_atm.c b/net/sched/sch_atm.c
index a77a4fb..8522a47 100644 (file)
--- a/net/sched/sch_atm.c
+++ b/net/sched/sch_atm.c
@@ -423,8 +423,6 @@ drop: __maybe_unused
                }
                return ret;
        }
-       qdisc_bstats_update(sch, skb);
-       bstats_update(&flow->bstats, skb);
        /*
         * Okay, this may seem weird. We pretend we've dropped the packet if
         * it goes via ATM. The reason for this is that the outer qdisc
@@ -472,6 +470,8 @@ static void sch_atm_dequeue(unsigned long data)
                        if (unlikely(!skb))
                                break;
 
+                       qdisc_bstats_update(sch, skb);
+                       bstats_update(&flow->bstats, skb);
                        pr_debug("atm_tc_dequeue: sending on class %p\n", flow);
                        /* remove any LL header somebody else has attached */
                        skb_pull(skb, skb_network_offset(skb));

diff --git a/net/sched/sch_drr.c b/net/sched/sch_drr.c
index c218987..9ce0b4f 100644 (file)
--- a/net/sched/sch_drr.c
+++ b/net/sched/sch_drr.c
@@ -376,8 +376,6 @@ static int drr_enqueue(struct sk_buff *skb, struct Qdisc *sch)
                cl->deficit = cl->quantum;
        }
 
-       bstats_update(&cl->bstats, skb);
-
        sch->q.qlen++;
        return err;
 }
@@ -403,6 +401,8 @@ static struct sk_buff *drr_dequeue(struct Qdisc *sch)
                        skb = qdisc_dequeue_peeked(cl->qdisc);
                        if (cl->qdisc->q.qlen == 0)
                                list_del(&cl->alist);
+
+                       bstats_update(&cl->bstats, skb);
                        qdisc_bstats_update(sch, skb);
                        sch->q.qlen--;
                        return skb;

diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index 8db3e2c..6c2ec45 100644 (file)
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -1609,7 +1609,6 @@ hfsc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
        if (cl->qdisc->q.qlen == 1)
                set_active(cl, qdisc_pkt_len(skb));
 
-       bstats_update(&cl->bstats, skb);
        sch->q.qlen++;
 
        return NET_XMIT_SUCCESS;
@@ -1657,6 +1656,7 @@ hfsc_dequeue(struct Qdisc *sch)
                return NULL;
        }
 
+       bstats_update(&cl->bstats, skb);
        update_vf(cl, qdisc_pkt_len(skb), cur_time);
        if (realtime)
                cl->cl_cumul += qdisc_pkt_len(skb);

diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index acae5b0..9d75b77 100644 (file)
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -574,7 +574,6 @@ static int htb_enqueue(struct sk_buff *skb, struct Qdisc *sch)
                }
                return ret;
        } else {
-               bstats_update(&cl->bstats, skb);
                htb_activate(q, cl);
        }
 
@@ -835,6 +834,7 @@ next:
        } while (cl != start);
 
        if (likely(skb != NULL)) {
+               bstats_update(&cl->bstats, skb);
                cl->un.leaf.deficit[level] -= qdisc_pkt_len(skb);
                if (cl->un.leaf.deficit[level] < 0) {
                        cl->un.leaf.deficit[level] += cl->quantum;