Re: [0/2] Fix problems with with IFLA_VF_PORTS (v2)

David Miller
2014-04-24T17:53:25Z

From: David Gibson <david@gibson.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!