On Fri, May 5, 2017 at 5:47 AM, Simon Horman <simon.hor...@netronome.com> wrote:
>
>  # tc qdisc del dev eth0 ingress; tc qdisc add dev eth0 ingress
>  # tc filter add dev eth0 protocol ip parent ffff: flower \
>        indev eth0 ip_proto udp dst_port 80 truncated drop action continue
>
[...]
> @@ -188,7 +189,7 @@ static int fl_classify(struct sk_buff *skb, const struct 
> tcf_proto *tp,
>          */
>         skb_key.basic.n_proto = skb->protocol;
>         if (!skb_flow_dissect(skb, &head->dissector, &skb_key, 0))
> -               return -1;
> +               return head->err_action;

This design looks odd, if you consider matching truncated packets as
a filter like other normal filters, then you should rely on the action
appended to return the action code, not within the filter itself.

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