[v2] xen-netback: allow changing the MAC address of the interface

Sometimes it is useful to be able to change the MAC address of the
interface for netback devices. For example, when using ebtables it may
be useful to be able to distinguish traffic from different interfaces
without depending on the interface name.

Reported-by: Nikita Borzykh <sample.n@gmail.com>
Reported-by: Paul Harvey <stockingpaul@hotmail.com>
Cc: netdev@vger.kernel.org
Cc: xen-devel@lists.xen.org
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Matt Wilson <msw@amazon.com>

---
Changes since v1:
 * No code changes, only updated commit message
---
 drivers/net/xen-netback/interface.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

On Tue, Jan 22, 2013 at 06:08:25PM +0000, Matt Wilson wrote:
> Sometimes it is useful to be able to change the MAC address of the
> interface for netback devices. For example, when using ebtables it may
> be useful to be able to distinguish traffic from different interfaces
> without depending on the interface name.
> 
> Reported-by: Nikita Borzykh <sample.n@gmail.com>
> Reported-by: Paul Harvey <stockingpaul@hotmail.com>
> Cc: netdev@vger.kernel.org
> Cc: xen-devel@lists.xen.org
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

> Acked-by: Ian Campbell <ian.campbell@citrix.com>
> Signed-off-by: Matt Wilson <msw@amazon.com>
> 
> ---
> Changes since v1:
>  * No code changes, only updated commit message
> ---
>  drivers/net/xen-netback/interface.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
> index b7d41f8..f733cae 100644
> --- a/drivers/net/xen-netback/interface.c
> +++ b/drivers/net/xen-netback/interface.c
> @@ -238,6 +238,8 @@ static const struct net_device_ops xenvif_netdev_ops = {
>  	.ndo_stop	= xenvif_close,
>  	.ndo_change_mtu	= xenvif_change_mtu,
>  	.ndo_fix_features = xenvif_fix_features,
> +	.ndo_set_mac_address = eth_mac_addr,
> +	.ndo_validate_addr   = eth_validate_addr,
>  };
>  
>  struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
> -- 
> 1.7.4.5
> 
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From: Matt Wilson <msw@amazon.com>
Date: Tue, 22 Jan 2013 18:08:25 +0000

> Sometimes it is useful to be able to change the MAC address of the
> interface for netback devices. For example, when using ebtables it may
> be useful to be able to distinguish traffic from different interfaces
> without depending on the interface name.
> 
> Reported-by: Nikita Borzykh <sample.n@gmail.com>
> Reported-by: Paul Harvey <stockingpaul@hotmail.com>
> Cc: netdev@vger.kernel.org
> Cc: xen-devel@lists.xen.org
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> Acked-by: Ian Campbell <ian.campbell@citrix.com>
> Signed-off-by: Matt Wilson <msw@amazon.com>

Applied to net-next, thanks.
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