diff mbox

[net] fq_codel: fix return value of fq_codel_drop()

Message ID 1436898118-30804-2-git-send-email-xiyou.wangcong@gmail.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Cong Wang July 14, 2015, 6:21 p.m. UTC 
The ->drop() is supposed to return the number of bytes it dropped,
however fq_codel_drop() returns the index of the flow where it drops
a packet from.

Fix this by introducing a helper to wrap fq_codel_drop().

Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Cong Wang <cwang@twopensource.com>
---
 net/sched/sch_fq_codel.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

Comments

Eric Dumazet July 15, 2015, 6:27 a.m. UTC | #1 
On Tue, 2015-07-14 at 11:21 -0700, Cong Wang wrote:
> The ->drop() is supposed to return the number of bytes it dropped,
> however fq_codel_drop() returns the index of the flow where it drops
> a packet from.
> 
> Fix this by introducing a helper to wrap fq_codel_drop().
> 
> Cc: Eric Dumazet <edumazet@google.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
> Signed-off-by: Cong Wang <cwang@twopensource.com>
> ---

SGTM, thanks Cong.

Acked-by: Eric Dumazet <edumazet@google.com>


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David Miller July 16, 2015, 4:36 a.m. UTC | #2 
From: Cong Wang <xiyou.wangcong@gmail.com>
Date: Tue, 14 Jul 2015 11:21:58 -0700

> The ->drop() is supposed to return the number of bytes it dropped,
> however fq_codel_drop() returns the index of the flow where it drops
> a packet from.
> 
> Fix this by introducing a helper to wrap fq_codel_drop().
> 
> Cc: Eric Dumazet <edumazet@google.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
> Signed-off-by: Cong Wang <cwang@twopensource.com>

Applied.
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diff mbox

Patch

diff --git a/net/sched/sch_fq_codel.c b/net/sched/sch_fq_codel.c
index 06e7c84..21ca33c 100644
--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -163,6 +163,15 @@  static unsigned int fq_codel_drop(struct Qdisc *sch)
 	return idx;
 }
 
+static unsigned int fq_codel_qdisc_drop(struct Qdisc *sch)
+{
+	unsigned int prev_backlog;
+
+	prev_backlog = sch->qstats.backlog;
+	fq_codel_drop(sch);
+	return prev_backlog - sch->qstats.backlog;
+}
+
 static int fq_codel_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 {
 	struct fq_codel_sched_data *q = qdisc_priv(sch);
@@ -604,7 +613,7 @@  static struct Qdisc_ops fq_codel_qdisc_ops __read_mostly = {
 	.enqueue	=	fq_codel_enqueue,
 	.dequeue	=	fq_codel_dequeue,
 	.peek		=	qdisc_peek_dequeued,
-	.drop		=	fq_codel_drop,
+	.drop		=	fq_codel_qdisc_drop,
 	.init		=	fq_codel_init,
 	.reset		=	fq_codel_reset,
 	.destroy	=	fq_codel_destroy,