netdev - Re: [PATCH 7/7] vxlan: Add support for UDP checksums (v4 TX, v6 zero csums)

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Date:	Thu, 29 May 2014 15:45:19 -0700
From:	Jesse Gross <jesse@...ira.com>
To:	Tom Herbert <therbert@...gle.com>
Cc:	David Miller <davem@...emloft.net>, netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH 7/7] vxlan: Add support for UDP checksums (v4 TX, v6 zero csums)

On Wed, May 28, 2014 at 9:24 PM, Tom Herbert <therbert@...gle.com> wrote:
> diff --git a/net/openvswitch/vport-vxlan.c b/net/openvswitch/vport-vxlan.c
> index a93efa3..0edbd95 100644
> --- a/net/openvswitch/vport-vxlan.c
> +++ b/net/openvswitch/vport-vxlan.c
> @@ -122,7 +122,7 @@ static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
>         vxlan_port = vxlan_vport(vport);
>         strncpy(vxlan_port->name, parms->name, IFNAMSIZ);
>
> -       vs = vxlan_sock_add(net, htons(dst_port), vxlan_rcv, vport, true, false);
> +       vs = vxlan_sock_add(net, htons(dst_port), vxlan_rcv, vport, true, 0);

OVS actually already has support for specifying that checksums should
be calculated/verified plumbed down to the kernel. This is used
already with GRE (via the TUNNEL_CSUM flag). If we modeled VXLAN
similarly then it might make the two protocols more similar and give
us OVS support for free.
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