netdev - Re: [PATCH net-next v6 01/15] rtnetlink: provide permanent hardware address in RTM

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Date:   Tue, 2 Jul 2019 13:57:50 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Michal Kubecek <mkubecek@...e.cz>
Cc:     David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        John Linville <linville@...driver.com>,
        Stephen Hemminger <stephen@...workplumber.org>,
        Johannes Berg <johannes@...solutions.net>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v6 01/15] rtnetlink: provide permanent hardware
 address in RTM_NEWLINK

Tue, Jul 02, 2019 at 01:49:44PM CEST, mkubecek@...e.cz wrote:
>Permanent hardware address of a network device was traditionally provided
>via ethtool ioctl interface but as Jiri Pirko pointed out in a review of
>ethtool netlink interface, rtnetlink is much more suitable for it so let's
>add it to the RTM_NEWLINK message.
>
>Add IFLA_PERM_ADDRESS attribute to RTM_NEWLINK messages unless the
>permanent address is all zeros (i.e. device driver did not fill it). As
>permanent address is not modifiable, reject userspace requests containing
>IFLA_PERM_ADDRESS attribute.
>
>Note: we already provide permanent hardware address for bond slaves;
>unfortunately we cannot drop that attribute for backward compatibility
>reasons.
>
>v5 -> v6: only add the attribute if permanent address is not zero
>
>Signed-off-by: Michal Kubecek <mkubecek@...e.cz>

Acked-by: Jiri Pirko <jiri@...lanox.com>