netdev - Re: [patch net-next rfc 3/7] net: rtnetlink: add commands to add and delete alternative ifnames

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Date:   Fri, 9 Aug 2019 17:46:09 +0200
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Roopa Prabhu <roopa@...ulusnetworks.com>
Cc:     Jiri Pirko <jiri@...nulli.us>, netdev <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        David Ahern <dsahern@...il.com>, dcbw@...hat.com,
        Andrew Lunn <andrew@...n.ch>, parav@...lanox.com,
        Saeed Mahameed <saeedm@...lanox.com>,
        mlxsw <mlxsw@...lanox.com>
Subject: Re: [patch net-next rfc 3/7] net: rtnetlink: add commands to add and
 delete alternative ifnames

On Fri, Aug 09, 2019 at 08:40:25AM -0700, Roopa Prabhu wrote:
> to that point, I am also not sure why we have a new API For multiple
> names. I mean why support more than two names  (existing old name and
> a new name to remove the length limitation) ?

One use case is to allow "predictable names" from udev/systemd to work
the way do for e.g. block devices, see

  http://lkml.kernel.org/r/20190628162716.GF29149@unicorn.suse.cz

Michal