netdev - Re: [PATCH v1 1/6] net: Generalize udp based tunnel offload

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Message-ID: <CAEh+42jWN961Gg59xbdXiFj9u7=3vuFdyXkcr6iPJ92ZizPpGw@mail.gmail.com>
Date:	Mon, 23 Nov 2015 14:49:43 -0800
From:	Jesse Gross <jesse@...nel.org>
To:	Tom Herbert <tom@...bertland.com>
Cc:	Anjali Singhai Jain <anjali.singhai@...el.com>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	Kiran Patil <kiran.patil@...el.com>
Subject: Re: [PATCH v1 1/6] net: Generalize udp based tunnel offload

On Mon, Nov 23, 2015 at 1:53 PM, Tom Herbert <tom@...bertland.com> wrote:
>> diff --git a/include/net/udp_tunnel.h b/include/net/udp_tunnel.h
>> index cb2f89f..72415aa 100644
>> --- a/include/net/udp_tunnel.h
>> +++ b/include/net/udp_tunnel.h
>> @@ -9,6 +9,12 @@
>>  #include <net/addrconf.h>
>>  #endif
>>
>> +enum udp_tunnel_type {
>> +       UDP_TUNNEL_UNSPEC,
>> +       UDP_TUNNEL_VXLAN,
>> +       UDP_TUNNEL_GENEVE,
>> +};
>> +
>
> Sorry, I still don't like this. Grant it least it gets rid of of VXLAN
> specific ops, but the problem is there no such things as a common set
> of encapsulations in the kernel (e.g. foo-over-udp adds a bunch of
> encapsulations not represented here), no defined common set of device
> functionality that needs this, and this precludes the use of the RX
> accelerations to be available from a userpsace  implementation.

Regardless, I think this is at least a good cleanup of what is already
there compared to having VXLAN-specific NDOs. We can always add
additional things in the future.
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