From: Jarek Poplawski <jarkao2@gmail•com>
To: David Miller <davem@davemloft•net>
Cc: netdev@vger•kernel.org
Subject: [PATCH][NET_SCHED] sch_htb: htb_requeue fix
Date: Fri, 8 Feb 2008 08:57:49 +0000 [thread overview]
Message-ID: <20080208085749.GA5656@ff.dom.local> (raw)
htb_requeue() enqueues skbs for which htb_classify() returns NULL.
This is wrong because such skbs could be handled by NET_CLS_ACT code,
and the decision could be different than earlier in htb_enqueue().
So htb_requeue() is changed to work and look more like htb_enqueue().
Signed-off-by: Jarek Poplawski <jarkao2@gmail•com>
---
diff -Nurp 2.6.24-mm1-/net/sched/sch_htb.c 2.6.24-mm1+/net/sched/sch_htb.c
--- 2.6.24-mm1-/net/sched/sch_htb.c 2008-02-05 07:45:48.000000000 +0000
+++ 2.6.24-mm1+/net/sched/sch_htb.c 2008-02-08 08:19:25.000000000 +0000
@@ -609,14 +609,14 @@ static int htb_enqueue(struct sk_buff *s
/* TODO: requeuing packet charges it to policers again !! */
static int htb_requeue(struct sk_buff *skb, struct Qdisc *sch)
{
+ int ret;
struct htb_sched *q = qdisc_priv(sch);
- int ret = NET_XMIT_SUCCESS;
struct htb_class *cl = htb_classify(skb, sch, &ret);
struct sk_buff *tskb;
- if (cl == HTB_DIRECT || !cl) {
+ if (cl == HTB_DIRECT) {
/* enqueue to helper queue */
- if (q->direct_queue.qlen < q->direct_qlen && cl) {
+ if (q->direct_queue.qlen < q->direct_qlen) {
__skb_queue_head(&q->direct_queue, skb);
} else {
__skb_queue_head(&q->direct_queue, skb);
@@ -625,6 +625,13 @@ static int htb_requeue(struct sk_buff *s
sch->qstats.drops++;
return NET_XMIT_CN;
}
+#ifdef CONFIG_NET_CLS_ACT
+ } else if (!cl) {
+ if (ret == NET_XMIT_BYPASS)
+ sch->qstats.drops++;
+ kfree_skb(skb);
+ return ret;
+#endif
} else if (cl->un.leaf.q->ops->requeue(skb, cl->un.leaf.q) !=
NET_XMIT_SUCCESS) {
sch->qstats.drops++;
next reply other threads:[~2008-02-08 8:50 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-08 8:57 Jarek Poplawski [this message]
2008-02-10 7:44 ` [PATCH][NET_SCHED] sch_htb: htb_requeue fix David Miller
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