Subject: Re: [patch net-next 04/10] net: Add netif_is_vrf_master helper

From: Ido Schimmel <[email-masked]>
Date: Mon, 13 Mar 2017 17:01:03 +0200

On Mon, Mar 13, 2017 at 08:39:19AM -0600, David Ahern wrote:
> On 3/13/17 1:38 AM, Jiri Pirko wrote:
> > From: Ido Schimmel <[email-masked]>
> > 
> > Drivers capable of offloading VRF configurations need to know the ports
> > are enslaved to an actual VRF device and not some other L3 master.
> > 
> > Add a flag to indicate netdev is a VRF master and a corresponding
> > helper.
> > 
> > Signed-off-by: Ido Schimmel <[email-masked]>
> > Signed-off-by: Jiri Pirko <[email-masked]>
> > ---
> >  drivers/net/vrf.c         | 2 +-
> >  include/linux/netdevice.h | 8 ++++++++
> >  2 files changed, 9 insertions(+), 1 deletion(-)
> > 
> 
> IFF_VRF_MASTER was renamed IFF_L3MDEV_MASTER 18 months ago.

But IFF_L3MDEV_MASTER isn't specific to the VRF driver. It can be set by
other drivers including future ones that might be introduced. I need to
allow enslavement to a VRF master, but reject others.