netdev - Re: [PATCH net-next 2/3] gso: limit udp gso to egress-only virtual devices

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Date:   Mon, 14 May 2018 19:12:57 -0400
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Network Development <netdev@...r.kernel.org>
Cc:     David Miller <davem@...emloft.net>,
        Willem de Bruijn <willemb@...gle.com>,
        Alexander Duyck <alexander.duyck@...il.com>
Subject: Re: [PATCH net-next 2/3] gso: limit udp gso to egress-only virtual devices

On Mon, May 14, 2018 at 7:07 PM, Willem de Bruijn
<willemdebruijn.kernel@...il.com> wrote:
> From: Willem de Bruijn <willemb@...gle.com>
>
> Until the udp receive stack supports large packets (UDP GRO), GSO
> packets must not loop from the egress to the ingress path.
>
> Revert the change that added NETIF_F_GSO_UDP_L4 to various virtual
> devices through NETIF_F_GSO_ENCAP_ALL as this included devices that
> may loop packets, such as veth and macvlan.
>
> Instead add it to specific devices that forward to another device's
> egress path: bonding and team.
>
> Fixes: 83aa025f535f ("udp: add gso support to virtual devices")
> CC: Alexander Duyck <alexander.duyck@...il.com>
> Signed-off-by: Willem de Bruijn <willemb@...gle.com>
> ---

> diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c
> index 9dbd390ace34..c6a9f0cafea2 100644
> --- a/drivers/net/team/team.c
> +++ b/drivers/net/team/team.c
> @@ -1026,7 +1026,8 @@ static void __team_compute_features(struct team *team)
>         }
>
>         team->dev->vlan_features = vlan_features;
> -       team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
> +       team->dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL |
> +                                    NETIF_GSO_UDP_L4;

This has a typo. team.ko did not build automatically for me and caught it
with a full compile just too late.

Need to send a v2, sorry.