Re: [PATCH net 2/6] net/sched: sch_clsact: Only create under TC_H_CLSACT

[Jamal Hadi Salim]

On Fri, May 5, 2023 at 8:13 PM Peilin Ye <yepeilin.cs@xxxxxxxxx> wrote:
>
> 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")
> Signed-off-by: Peilin Ye <peilin.ye@xxxxxxxxxxxxx>

Reviewed-by: Jamal Hadi Salim <jhs@xxxxxxxxxxxx>
Acked-by: Jamal Hadi Salim <jhs@xxxxxxxxxxxx>

cheers,
jamal

> ---
>  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
>