netdev - [PATCH net-next 2/5] net/sched: sch_drr: warn about class in use while deleting

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Date: Fri, 21 Jul 2023 16:13:29 -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 2/5] net/sched: sch_drr: 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_drr.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/sched/sch_drr.c b/net/sched/sch_drr.c
index 0bffa01c61bb..32165c8a3bd9 100644
--- a/net/sched/sch_drr.c
+++ b/net/sched/sch_drr.c
@@ -150,8 +150,10 @@ static int drr_delete_class(struct Qdisc *sch, unsigned long arg,
 	struct drr_sched *q = qdisc_priv(sch);
 	struct drr_class *cl = (struct drr_class *)arg;
 
-	if (qdisc_class_in_use(&cl->common))
+	if (qdisc_class_in_use(&cl->common)) {
+		NL_SET_ERR_MSG(extack, "DRR class is in use");
 		return -EBUSY;
+	}
 
 	sch_tree_lock(sch);
 
-- 
2.39.2