netdev - Re: [patch net-next 0/4] net: allow to change carrier from userspace

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Message-ID: <20121213161733.7bffe897@obelix.rh>
Date:	Thu, 13 Dec 2012 16:17:33 -0200
From:	Flavio Leitner <fbl@...hat.com>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	John Fastabend <john.fastabend@...il.com>,
	Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org,
	davem@...emloft.net, edumazet@...gle.com,
	bhutchings@...arflare.com, mirqus@...il.com,
	greearb@...delatech.com
Subject: Re: [patch net-next 0/4] net: allow to change carrier from
 userspace

On Thu, 13 Dec 2012 10:09:33 -0800
Stephen Hemminger <shemminger@...tta.com> wrote:

> On Thu, 13 Dec 2012 15:54:23 -0200
> Flavio Leitner <fbl@...hat.com> wrote:
> 
> > I am saying this because people are used to and there are scripts out
> > there using something like:
> > # ethtool <iface> | grep 'Link'
> > to react an interface failure.
> 
> Then the script is broken. It is asking about hardware state.

I was talking about the team master interface, so it makes sense
to check its 'hardware' state. Just think on 'bond0' interface
with no slaves. It should report Link detected: no.

See bond_release(), what happens if bond->slave_cnt == 0, for instance.

-- 
fbl
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