netdev - Re: [RFC PATCH v0 1/2] net: bridge: propagate FDB table into hardware

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Message-ID: <4F4FF3E4.5010003@intel.com>
Date:	Thu, 01 Mar 2012 14:10:44 -0800
From:	John Fastabend <john.r.fastabend@...el.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
CC:	Jamal Hadi Salim <jhs@...atatu.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	bhutchings@...arflare.com, roprabhu@...co.com,
	netdev@...r.kernel.org, chrisw@...hat.com, davem@...emloft.net,
	gregory.v.rose@...el.com, kvm@...r.kernel.org, sri@...ibm.com,
	kernel@...tstofly.org
Subject: Re: [RFC PATCH v0 1/2] net: bridge: propagate FDB table into hardware

On 3/1/2012 6:14 AM, Michael S. Tsirkin wrote:
> On Wed, Feb 29, 2012 at 09:25:56AM -0800, John Fastabend wrote:
>> Agreed. I think adding some ndo_ops for bridging offloads here would
>> work. For example the DSA infrastructure and/or macvlan devices might
>> need this. Along the lines of extending this RFC,
>>
>> [RFC] hardware bridging support for DSA switches
>> http://patchwork.ozlabs.org/patch/16578/
>>
>>
>> .John
> 
> One place where this might not work well would be
> macvtap which is not a network device so it doesn't have
> its own address, instead it inherits one from macvlan.
> 

But is macvtap really doing any forwarding or implementing any
RX filters? Took a quick scan and it looks like the forwarding
logic is all in the macvlan code paths. In this case I suspect
if we enable macvlan then any device built on top of it would
work.

.John
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