netdev - RE: [Intel-wired-lan] [PATCH] iavf: fix MAC address setting for VFs when filter is rejected

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Date:   Thu, 5 Sep 2019 20:32:54 +0000
From:   "Bowers, AndrewX" <andrewx.bowers@...el.com>
To:     "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH] iavf: fix MAC address setting for VFs
 when filter is rejected

> -----Original Message-----
> From: Intel-wired-lan [mailto:intel-wired-lan-bounces@...osl.org] On
> Behalf Of Stefan Assmann
> Sent: Wednesday, September 4, 2019 11:34 PM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: netdev@...r.kernel.org; davem@...emloft.net; sassmann@...nic.de
> Subject: [Intel-wired-lan] [PATCH] iavf: fix MAC address setting for VFs when
> filter is rejected
> 
> Currently iavf unconditionally applies MAC address change requests. This
> brings the VF in a state where it is no longer able to pass traffic if the PF
> rejects a MAC filter change for the VF.
> A typical scenario for a rejected MAC filter is for an untrusted VF to request
> to change the MAC address when an administratively set MAC is present.
> 
> To keep iavf working in this scenario the MAC filter handling in iavf needs to
> act on the PF reply regarding the MAC filter change. In the case of an ack the
> new MAC address gets set, whereas in the case of a nack the previous MAC
> address needs to stay in place.
> 
> Signed-off-by: Stefan Assmann <sassmann@...nic.de>
> ---
>  drivers/net/ethernet/intel/iavf/iavf_main.c     | 1 -
>  drivers/net/ethernet/intel/iavf/iavf_virtchnl.c | 7 +++++++
>  2 files changed, 7 insertions(+), 1 deletion(-)

Tested-by: Andrew Bowers <andrewx.bowers@...el.com>