netdev - Re: [evb] RE: [PATCH][RFC] net/bridge: add basic VEPA support

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Date:	Mon, 10 Aug 2009 08:20:37 -0700
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Or Gerlitz <ogerlitz@...taire.com>
Cc:	"Paul Congdon (UC Davis)" <ptcongdon@...avis.edu>, arnd@...db.de,
	anna.fischer@...com, netdev@...r.kernel.org,
	bridge@...ts.linux-foundation.org, davem@...emloft.net,
	adobriyan@...il.com, virtualization@...ts.linux-foundation.org,
	"evb@...oogroups.com" <evb@...oogroups.com>
Subject: Re: [evb] RE: [PATCH][RFC] net/bridge: add basic VEPA support

On Sun, 09 Aug 2009 14:19:08 +0300
Or Gerlitz <ogerlitz@...taire.com> wrote:

> Stephen Hemminger wrote:
> > I have a patch that forwards all multicast packets, and another that does proper forwarding. It should have worked that way in original macvlan, the current behavior is really a bug.
> >   
> Looking in macvlan_set_multicast_list() it acts in a similar manner to
> macvlan_set_mac_address() in the sense that it calls dev_mc_sync(). I
> assume what's left is to add macvlan_hash_xxx multicast logic to
> map/unmap multicast groups to what macvlan devices want to receive them
> and this way the flooding can be removed, correct?

The device can just flood all multicast packets, since the filtering
is done on the receive path anyway.
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