netdev - Re: [PATCH net-next RESEND] net: Do not call ndo_dflt_fdb_dump if ndo_fdb

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Date:	Tue, 16 Dec 2014 09:21:21 -0800
From:	"Samudrala, Sridhar" <sridhar.samudrala@...el.com>
To:	John Fastabend <john.fastabend@...il.com>,
	Jamal Hadi Salim <jhs@...atatu.com>
CC:	Hubert Sokolowski <h.sokolowski@....edu.pl>,
	Roopa Prabhu <roopa@...ulusnetworks.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Vlad Yasevich <vyasevic@...hat.com>
Subject: Re: [PATCH net-next RESEND] net: Do not call ndo_dflt_fdb_dump if
 ndo_fdb_dump is defined.


On 12/16/2014 8:35 AM, John Fastabend wrote:
>
>> Is there no way to get the unicast/multicast mac addresses for such
>> a driver?
>
> You can almost infer it from ip link by looking at all the stacked
> drivers and figuring out how the address are propagated down. Then
> look at the routes and figure out multicast address. But other than
> the fdb dump mechanism I don't think there is anything.

It looks like we can get the device specific unicast/multicast mac 
addresses via 'ip maddr' too.


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