netdev - Re: [PATCH net-next v2 2/2] ip_gre: propogate target device GSO capability to the tunnel device

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Date:	Tue, 19 Feb 2013 10:39:44 -0800
From:	pravin <pravin.shelar@...il.com>
To:	Dmitry Kravkov <dmitry@...adcom.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2 2/2] ip_gre: propogate target device GSO
 capability to the tunnel device

On Mon, Feb 18, 2013 at 11:50 AM, Dmitry Kravkov <dmitry@...adcom.com> wrote:
>
> Signed-off-by: Dmitry Kravkov <dmitry@...adcom.com>
> ---
> Changes from v1: fixed email address
>
>
>  net/ipv4/ip_gre.c |   10 ++++++++--
>  1 files changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
> index cdc31ac..31bc941 100644
> --- a/net/ipv4/ip_gre.c
> +++ b/net/ipv4/ip_gre.c
> @@ -1103,8 +1103,14 @@ static int ipgre_tunnel_bind_dev(struct net_device *dev)
>         tunnel->hlen = addend;
>         /* TCP offload with GRE SEQ is not supported. */
>         if (!(tunnel->parms.o_flags & GRE_SEQ)) {
> -               dev->features           |= NETIF_F_GSO_SOFTWARE;
> -               dev->hw_features        |= NETIF_F_GSO_SOFTWARE;
> +               /* device supports enc gso offload*/
> +               if (tdev->hw_enc_features & NETIF_F_GRE_GSO) {
> +                       dev->features           |= NETIF_F_TSO;
> +                       dev->hw_features        |= NETIF_F_TSO;
> +               } else {
> +                       dev->features           |= NETIF_F_GSO_SOFTWARE;
> +                       dev->hw_features        |= NETIF_F_GSO_SOFTWARE;
> +               }
>         }

I am not sure about this change, Are you trying to limit GRE TSO to
just IPV4  in case of GRE offload in hardware?

>
>         return mtu;
> --
> 1.7.7.2
>
>
> --
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