netdev - Re: [PATCH net-next 5/5] vxlan: implement GPE in L3 mode

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Message-ID: <CAEh+42hoeFJ06k8vOPPRSVNzQTCE1VECJ4pac+BEnAJoAkZgkQ@mail.gmail.com>
Date:	Tue, 8 Mar 2016 14:18:41 -0800
From:	Jesse Gross <jesse@...nel.org>
To:	Jiri Benc <jbenc@...hat.com>
Cc:	Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 5/5] vxlan: implement GPE in L3 mode

On Sat, Feb 27, 2016 at 11:44 AM, Jiri Benc <jbenc@...hat.com> wrote:
> On Sat, 27 Feb 2016 20:21:59 +0100, Jiri Benc wrote:
>> You mean returning ETH_P_TEB in skb->protocol? That's not much useful,
>> unfortunately. You won't get such packet processed by the kernel IP
>> stack, rendering the VXLAN-GPE device unusable outside of ovs. It would
>> effectively became a packet sink when used standalone, as it cannot be
>> added to bridge and received packets are not processed by anything -
>> there's no protocol handler for ETH_P_TEB.
>
> Actually, I can do that in the L3 mode (or whatever we'll call it). It
> won't hurt anything and may be useful for openvswitch. Ovs will have to
> special case VXLAN-GPE vport (or perhaps any ARPHRD_NONE port) and set
> skb->protocol to ETH_P_TEB on xmit and dissect correctly the ETH_P_TEB
> packet on rcv.
>
> The L2 mode (or whatever we'll call it) will need to stay, though, for
> non-ovs use cases.

Sorry for the delay in responding but this plan sounds good to me.