[ovs-dev] [RFC PATCH kernel 04/10] openvswitch: IPv6 type of tunnel vports

[Jesse Gross]

On Thu, May 14, 2015 at 11:10 AM, Jiri Benc <jbenc at redhat.com> wrote:
> diff --git a/include/uapi/linux/openvswitch.h b/include/uapi/linux/openvswitch.h
> index 4d26da40b01f..ba7ae3b05308 100644
> --- a/include/uapi/linux/openvswitch.h
> +++ b/include/uapi/linux/openvswitch.h
> @@ -267,6 +267,7 @@ enum {
>         OVS_TUNNEL_ATTR_UNSPEC,
>         OVS_TUNNEL_ATTR_DST_PORT, /* 16-bit UDP port, used by L4 tunnels. */
>         OVS_TUNNEL_ATTR_EXTENSION,
> +       OVS_TUNNEL_ATTR_OVER_IPV6,/* when present, tunneling over IPv6 */

This is perhaps a flaw in the existing interface but old kernels will
silently ignore requests for v6 tunnels and create v4 ones instead,
which seems like a bad thing.

I also think that it is important to figure out how to model
simultaneous v4 and v6 tunnels on the same port as it seems like a
reasonable thing to do, even if it is not supported initially. If they
share the same vport in the kernel so they can bind at the same time
then I guess this flag isn't really needed.

However, perhaps this is all moot anyways assuming the that netdevice
based model is accepted as the ports would presumably be configured
directly through that.