netdev - Re: [PATCH net-next v3 1/4] net/sched: act_tunnel

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Date:   Tue, 28 Mar 2023 18:32:21 -0400
From:   Jamal Hadi Salim <jhs@...atatu.com>
To:     Davide Caratti <dcaratti@...hat.com>
Cc:     Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Ilya Maximets <i.maximets@....org>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        Pedro Tammela <pctammela@...atatu.com>
Subject: Re: [PATCH net-next v3 1/4] net/sched: act_tunnel_key: add support
 for "don't fragment"

Try 2 (some silly spam filter blocked earlier email)

On Tue, Mar 28, 2023 at 12:45 PM Davide Caratti <dcaratti@...hat.com> wrote:
>
> extend "act_tunnel_key" to allow specifying TUNNEL_DONT_FRAGMENT.
>
> Suggested-by: Ilya Maximets <i.maximets@....org>
> Signed-off-by: Davide Caratti <dcaratti@...hat.com>


Acked-by: Jamal  Hadi Salim <jhs@...atatu.com>

cheers,
jamal

>
> ---
>  include/uapi/linux/tc_act/tc_tunnel_key.h | 1 +
>  net/sched/act_tunnel_key.c                | 5 +++++
>  2 files changed, 6 insertions(+)
>
> diff --git a/include/uapi/linux/tc_act/tc_tunnel_key.h b/include/uapi/linux/tc_act/tc_tunnel_key.h
> index 49ad4033951b..37c6f612f161 100644
> --- a/include/uapi/linux/tc_act/tc_tunnel_key.h
> +++ b/include/uapi/linux/tc_act/tc_tunnel_key.h
> @@ -34,6 +34,7 @@ enum {
>                                          */
>         TCA_TUNNEL_KEY_ENC_TOS,         /* u8 */
>         TCA_TUNNEL_KEY_ENC_TTL,         /* u8 */
> +       TCA_TUNNEL_KEY_NO_FRAG,         /* flag */
>         __TCA_TUNNEL_KEY_MAX,
>  };
>
> diff --git a/net/sched/act_tunnel_key.c b/net/sched/act_tunnel_key.c
> index 2d12d2626415..0c8aa7e686ea 100644
> --- a/net/sched/act_tunnel_key.c
> +++ b/net/sched/act_tunnel_key.c
> @@ -420,6 +420,9 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
>                     nla_get_u8(tb[TCA_TUNNEL_KEY_NO_CSUM]))
>                         flags &= ~TUNNEL_CSUM;
>
> +               if (nla_get_flag(tb[TCA_TUNNEL_KEY_NO_FRAG]))
> +                       flags |= TUNNEL_DONT_FRAGMENT;
> +
>                 if (tb[TCA_TUNNEL_KEY_ENC_DST_PORT])
>                         dst_port = nla_get_be16(tb[TCA_TUNNEL_KEY_ENC_DST_PORT]);
>
> @@ -747,6 +750,8 @@ static int tunnel_key_dump(struct sk_buff *skb, struct tc_action *a,
>                                    key->tp_dst)) ||
>                     nla_put_u8(skb, TCA_TUNNEL_KEY_NO_CSUM,
>                                !(key->tun_flags & TUNNEL_CSUM)) ||
> +                   ((key->tun_flags & TUNNEL_DONT_FRAGMENT) &&
> +                    nla_put_flag(skb, TCA_TUNNEL_KEY_NO_FRAG)) ||
>                     tunnel_key_opts_dump(skb, info))
>                         goto nla_put_failure;
>
> --
> 2.39.2
>