netdev - Re: [PATCH net 2/2] lwtunnel: remove source and destination UDP port config option

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Date:	Wed, 23 Sep 2015 10:12:41 +0200
From:	Thomas Graf <tgraf@...g.ch>
To:	Jiri Benc <jbenc@...hat.com>
Cc:	netdev@...r.kernel.org, Roopa Prabhu <roopa@...ulusnetworks.com>
Subject: Re: [PATCH net 2/2] lwtunnel: remove source and destination UDP port
 config option

On 09/22/15 at 06:12pm, Jiri Benc wrote:
> The UDP tunnel config is asymmetric wrt. to the ports used. The source and
> destination ports from one direction of the tunnel are not related to the
> ports of the other direction. We need to be able to respond to ARP requests
> using the correct ports without involving routing.
> 
> As the consequence, UDP ports need to be fixed property of the tunnel
> interface and cannot be set per route. Remove the ability to set ports per
> route. This is still okay to do, as no kernel has been released with these
> attributes yet.
> 
> Note that the ability to specify source and destination ports is preserved
> for other users of the lwtunnel API which don't use routes for tunnel key
> specification (like openvswitch).
> 
> If in the future we rework ARP handling to allow port specification, the
> attributes can be added back.
> 
> Signed-off-by: Jiri Benc <jbenc@...hat.com>

Acked-by: Thomas Graf <tgraf@...g.ch>
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