2 files changed, 16 insertions, 5 deletions

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 4323a74eea30..07977f8f2679 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1289,6 +1289,7 @@ static int __init pktsched_init(void)
 
 subsys_initcall(pktsched_init);
 
+EXPORT_SYMBOL(qdisc_lookup);
 EXPORT_SYMBOL(qdisc_get_rtab);
 EXPORT_SYMBOL(qdisc_put_rtab);
 EXPORT_SYMBOL(register_qdisc);
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index 864b8d353ffa..e0c9fbe73b15 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -206,7 +206,6 @@ static int netem_run(struct Qdisc *sch)
 static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 {
         struct netem_sched_data *q = qdisc_priv(sch);
-        struct sk_buff *skb2;
         int ret;
 
         pr_debug("netem_enqueue skb=%p\n", skb);
@@ -220,11 +219,21 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch)
         }
 
         /* Random duplication */
-        if (q->duplicate && q->duplicate >= get_crandom(&q->dup_cor)
-            && (skb2 = skb_clone(skb, GFP_ATOMIC)) != NULL) {
-                pr_debug("netem_enqueue: dup %p\n", skb2);
+        if (q->duplicate && q->duplicate >= get_crandom(&q->dup_cor)) {
+                struct sk_buff *skb2;
+
+                skb2 = skb_clone(skb, GFP_ATOMIC);
+                if (skb2 && netem_delay(sch, skb2) == NET_XMIT_SUCCESS) {
+                        struct Qdisc *qp;
+
+                        /* Since one packet can generate two packets in the
+                         * queue, the parent's qlen accounting gets confused,
+                         * so fix it.
+                         */
+                        qp = qdisc_lookup(sch->dev, TC_H_MAJ(sch->parent));
+                        if (qp)
+                                qp->q.qlen++;
 
-                if (netem_delay(sch, skb2)) {
                         sch->q.qlen++;
                         sch->bstats.bytes += skb2->len;
                         sch->bstats.packets++;
@@ -253,6 +262,7 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch)
         } else
                 sch->qstats.drops++;
 
+        pr_debug("netem: enqueue ret %d\n", ret);
         return ret;
 }