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net/sched: sch_htb: warn about class in use while deleting

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

Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Pedro Tammela 2023-07-28 12:35:36 -03:00 committed by Paolo Abeni
parent 8e4553ef3e
commit 7118f56e04
1 changed files with 3 additions and 1 deletions
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4
net/sched/sch_htb.c
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@ -1709,8 +1709,10 @@ static int htb_delete(struct Qdisc *sch, unsigned long arg,
* tc subsys guarantee us that in htb_destroy it holds no class
* refs so that we can remove children safely there ?
*/
if (cl->children || qdisc_class_in_use(&cl->common))
if (cl->children || qdisc_class_in_use(&cl->common)) {
NL_SET_ERR_MSG(extack, "HTB class in use");
return -EBUSY;
}
if (!cl->level && htb_parent_last_child(cl))
last_child = 1;