netdev - [PATCH net-next 1/3] net: sched: sch_choke: add statistics when calling qdisc_drop() in sch

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Date:   Thu, 25 Aug 2022 11:29:41 +0800
From:   Zhengchao Shao <shaozhengchao@...wei.com>
To:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <jhs@...atatu.com>,
        <xiyou.wangcong@...il.com>, <jiri@...nulli.us>
CC:     <weiyongjun1@...wei.com>, <yuehaibing@...wei.com>,
        <shaozhengchao@...wei.com>
Subject: [PATCH net-next 1/3] net: sched: sch_choke: add statistics when calling qdisc_drop() in sch_choke

Now, the "other" member in the choke_sched_data structure is not used.
According to the description, "other" should be added when calling
qdisc_drop() to discard packets.

Signed-off-by: Zhengchao Shao <shaozhengchao@...wei.com>
---
 net/sched/sch_choke.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/sched/sch_choke.c b/net/sched/sch_choke.c
index 2adbd945bf15..19c25ec36d0d 100644
--- a/net/sched/sch_choke.c
+++ b/net/sched/sch_choke.c
@@ -60,7 +60,7 @@ struct choke_sched_data {
 		u32	forced_drop;	/* Forced drops, qavg > max_thresh */
 		u32	forced_mark;	/* Forced marks, qavg > max_thresh */
 		u32	pdrop;          /* Drops due to queue limits */
-		u32	other;          /* Drops due to drop() calls */
+		u32	other;          /* Drops due to qdisc_drop() calls */
 		u32	matched;	/* Drops to flow match */
 	} stats;
 
@@ -127,6 +127,7 @@ static void choke_drop_by_idx(struct Qdisc *sch, unsigned int idx,
 	qdisc_qstats_backlog_dec(sch, skb);
 	qdisc_tree_reduce_backlog(sch, 1, qdisc_pkt_len(skb));
 	qdisc_drop(skb, sch, to_free);
+	q->stats.other++;
 	--sch->q.qlen;
 }
 
@@ -274,9 +275,11 @@ static int choke_enqueue(struct sk_buff *skb, struct Qdisc *sch,
 	}
 
 	q->stats.pdrop++;
+	q->stats.other++;
 	return qdisc_drop(skb, sch, to_free);
 
 congestion_drop:
+	q->stats.other++;
 	qdisc_drop(skb, sch, to_free);
 	return NET_XMIT_CN;
 }
-- 
2.17.1