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

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>

diff --git a/net/sched/sch_hfsc.c b/net/sched/sch_hfsc.c
index 896cb40..9880530 100644 (file)
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -1094,8 +1094,10 @@ hfsc_delete_class(struct Qdisc *sch, unsigned long arg,
        struct hfsc_class *cl = (struct hfsc_class *)arg;
 
        if (cl->level > 0 || qdisc_class_in_use(&cl->cl_common) ||
-           cl == &q->root)
+           cl == &q->root) {
+               NL_SET_ERR_MSG(extack, "HFSC class in use");
                return -EBUSY;
+       }
 
        sch_tree_lock(sch);