From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andy Gospodarek <gospo@cumulusnetworks.com>
Subject: Re: Fwd: Delivery Status Notification (Failure)
Date: Thu, 24 Sep 2015 08:50:10 -0400
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To: Naveen <dear.chap@gmail.com>
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On Thu, Sep 24, 2015 at 08:03:39AM -0400, Naveen wrote:
> Hi
>      Right now the only way to detect if an interface has a peer(veth)
> is touse ethtool -S. Instead I was thinking of adding it to device
> attributes as a peer_ifndex entry. In drivers/net/veth.c I could add
> an entry to
> dev->groups for a veth specific group. Would that be acceptable ?
> 

I've had similar discussions with others who agree with you that the
current method is not ideal -- especially when there are a large number
of namespaces in in use on a system.  One such proposal was to have the
output in ip link show (possibly only with the '-d' option), but no test
patches have been written yet....