netdev - Re: [0/2] Fix problems with with IFLA_VF

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Date:	Wed, 23 Apr 2014 08:14:15 -0700
From:	Greg Rose <gregory.v.rose@...el.com>
To:	David Gibson <david@...son.dropbear.id.au>
CC:	<netdev@...r.kernel.org>, <ssujith@...co.com>,
	<neepatel@...co.com>, <benve@...co.com>, <davem@...emloft.net>,
	<ben@...adent.org.uk>, <govindarajulu90@...il.com>
Subject: Re: [0/2] Fix problems with with IFLA_VF_PORTS

On Wed, 23 Apr 2014 17:21:03 +1000
David Gibson <david@...son.dropbear.id.au> wrote:

> I've had a customer encounter a problem with getifaddrs(3) freezing up
> on a system with a Cisco enic device.
> 
> I've discovered that the problem is caused by an enic device with a
> large number of SR-IOV virtual functions overflowing the normal sized
> packet buffer for netlink, leading to interfaces not being reported
> from an RTM_GETLINK request.
> 
> The first patch here just makes the problem easier to locate if it
> occurs again in a different way, by adding a WARN_ON() when we run out
> of room in a netlink packet in this manner.
> 
> The second patch actually fixes the problem, by only reporting
> IFLA_VF_PORTS information when the RTEXT_FILTER_VF flag is specified.
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Once you fix a couple of coding style errors mentioned by Jiri then

Acked-by: Greg Rose <gregory.v.rose@...el.com>
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