netdev - [PATCH net-next 5/5] net/sched: sch_qfq: warn about class in use while deleting

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Date: Fri, 21 Jul 2023 16:13:32 -0300
From: Pedro Tammela <pctammela@...atatu.com>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	jhs@...atatu.com,
	xiyou.wangcong@...il.com,
	jiri@...nulli.us,
	Pedro Tammela <pctammela@...atatu.com>
Subject: [PATCH net-next 5/5] net/sched: sch_qfq: warn about class in use while deleting

Add extack to warn that delete was rejected because
the class is still in use

Signed-off-by: Pedro Tammela <pctammela@...atatu.com>
---
 net/sched/sch_qfq.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/sched/sch_qfq.c b/net/sched/sch_qfq.c
index 2515828d99a6..7a0427353cf8 100644
--- a/net/sched/sch_qfq.c
+++ b/net/sched/sch_qfq.c
@@ -544,8 +544,10 @@ static int qfq_delete_class(struct Qdisc *sch, unsigned long arg,
 	struct qfq_sched *q = qdisc_priv(sch);
 	struct qfq_class *cl = (struct qfq_class *)arg;
 
-	if (qdisc_class_in_use(&cl->common))
+	if (qdisc_class_in_use(&cl->common)) {
+		NL_SET_ERR_MSG_MOD(extack, "QFQ class in use");
 		return -EBUSY;
+	}
 
 	sch_tree_lock(sch);
 
-- 
2.39.2