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

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Message-ID: <20160227204428.5f8f25a3@griffin>
Date:	Sat, 27 Feb 2016 20:44:28 +0100
From:	Jiri Benc <jbenc@...hat.com>
To:	Jesse Gross <jesse@...nel.org>
Cc:	Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next 5/5] vxlan: implement GPE in L3 mode

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.

 Jiri