netdev - Re: [PATCH net-next] tun: implement carrier change

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Message-ID: <20181129163609.GD1501@lunn.ch>
Date:   Thu, 29 Nov 2018 17:36:09 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Nicolas Dichtel <nicolas.dichtel@...nd.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        Didier Pallard <didier.pallard@...nd.com>
Subject: Re: [PATCH net-next] tun: implement carrier change

On Thu, Nov 29, 2018 at 12:06:18PM +0100, Nicolas Dichtel wrote:
> Le 28/11/2018 à 22:48, Andrew Lunn a écrit :
> > On Wed, Nov 28, 2018 at 07:12:56PM +0100, Nicolas Dichtel wrote:
> >> The userspace may need to control the carrier state.
> > 
> > Hi Nicolas
> Hi Andrew,
> 
> > 
> > Could you explain your user case a bit more.
> > 
> > Are you running a routing daemon on top of the interface, and want it
> > to reroute when the carrier goes down?
> Sort of, we have a daemon that monitors the app and may re-route the traffic to
> a secondary app if needed.

O.K, this sounds sensible.

It is often useful to explain the use case for changes like
this. People try to do crazy things sometimes.

Thanks
	Andrew