netdev - [PATCH net] fq_codel: return non zero qlen in class dumps

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Date:	Mon, 06 Jun 2016 09:12:39 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>,
	John Fastabend <john.r.fastabend@...el.com>
Subject: [PATCH net] fq_codel: return non zero qlen in class dumps

From: Eric Dumazet <edumazet@...gle.com>

We properly scan the flow list to count number of packets,
but John passed 0 to gnet_stats_copy_queue() so we report
a zero value to user space instead of the result.

Fixes: 640158536632 ("net: sched: restrict use of qstats qlen")
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
Cc: John Fastabend <john.r.fastabend@...el.com>
---
 net/sched/sch_fq_codel.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sched/sch_fq_codel.c b/net/sched/sch_fq_codel.c
index 6883a8971562..7a280360aeed 100644
--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -649,7 +649,7 @@ static int fq_codel_dump_class_stats(struct Qdisc *sch, unsigned long cl,
 		qs.backlog = q->backlogs[idx];
 		qs.drops = flow->dropped;
 	}
-	if (gnet_stats_copy_queue(d, NULL, &qs, 0) < 0)
+	if (gnet_stats_copy_queue(d, NULL, &qs, qs.qlen) < 0)
 		return -1;
 	if (idx < q->flows_cnt)
 		return gnet_stats_copy_app(d, &xstats, sizeof(xstats));