netdev - Re: [patch net-next-2.6 1/2] net: allow to change carrier via sysfs

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Message-ID: <CAHXqBFJpSZNhkur7QNYbjG-=Bkq2HtHKEHsn+H3TnEJ5NezJoA@mail.gmail.com>
Date:	Wed, 31 Aug 2011 10:33:50 +0200
From:	Michał Mirosław <mirqus@...il.com>
To:	Jiri Pirko <jpirko@...hat.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net,
	eric.dumazet@...il.com, bhutchings@...arflare.com,
	shemminger@...tta.com
Subject: Re: [patch net-next-2.6 1/2] net: allow to change carrier via sysfs

W dniu 31 sierpnia 2011 10:26 użytkownik Jiri Pirko <jpirko@...hat.com> napisał:
> Tue, Aug 30, 2011 at 08:11:37PM CEST, mirqus@...il.com wrote:
>>2011/8/30 Jiri Pirko <jpirko@...hat.com>:
>>> Allow to write to "carrier" attribute. Devices may implement ndo_change_carrier
>>> callback to allow changing carrier from userspace.
>>Do you expect drivers using implementation different than just calling
>>netif_carrier_on/off? Or is it supposed to also e.g. power down PHYs?
> Yes, generally it can be used also for en/disable phy, for testing
> purposes if hw and driver would support it.

I'd like to see this working for GRE tunnel devices (for keepalive
daemon to be able to indicate to routing daemons whether tunnel is
really working) - implementation would be identical to dummy's case.
Should I prepare a patch or can I leave it to you?

Best Regards,
Michał Mirosław
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