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

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Message-Id: <20140424.135323.2147922052612934860.davem@davemloft.net>
Date:	Thu, 24 Apr 2014 13:53:23 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	david@...son.dropbear.id.au
Cc:	netdev@...r.kernel.org, ssujith@...co.com, neepatel@...co.com,
	benve@...co.com, ben@...adent.org.uk, govindarajulu90@...il.com,
	gregory.v.rose@...el.com
Subject: Re: [0/2] Fix problems with with IFLA_VF_PORTS (v2)

From: David Gibson <david@...son.dropbear.id.au>
Date: Thu, 24 Apr 2014 10:22:34 +1000

> 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.
> 
> v2: Corrected some CodingStyle problems

Series applied to 'net' and queued up for -stable.

Thanks!
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