clsact Qdiscs are only supposed to be created under TC_H_CLSACT (which
equals TC_H_INGRESS). Return -EOPNOTSUPP if 'parent' is not
TC_H_CLSACT.
Fixes: 1f211a1b929c ("net, sched: add clsact qdisc")
Reviewed-by: Jamal Hadi Salim <[email protected]>
Acked-by: Jamal Hadi Salim <[email protected]>
Signed-off-by: Peilin Ye <[email protected]>
---
net/sched/sch_ingress.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c
index 3d71f7a3b4ad..13218a1fe4a5 100644
--- a/net/sched/sch_ingress.c
+++ b/net/sched/sch_ingress.c
@@ -222,6 +222,9 @@ static int clsact_init(struct Qdisc *sch, struct nlattr *opt,
struct net_device *dev = qdisc_dev(sch);
int err;
+ if (sch->parent != TC_H_CLSACT)
+ return -EOPNOTSUPP;
+
net_inc_ingress_queue();
net_inc_egress_queue();
--
2.20.1