netdev - Re: [PATCH net-next] net: change fib behavior based on interface link status

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Message-ID: <CAE4R7bDLgHYzWC=m-R73psbyLwZh0fvL_diFyW3g1DF8eve1sw@mail.gmail.com>
Date:	Wed, 3 Jun 2015 12:03:53 -0700
From:	Scott Feldman <sfeldma@...il.com>
To:	Andy Gospodarek <gospo@...ulusnetworks.com>
Cc:	Netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>, ddutt@...ulusnetworks.com
Subject: Re: [PATCH net-next] net: change fib behavior based on interface link status

On Wed, Jun 3, 2015 at 11:27 AM, Andy Gospodarek
<gospo@...ulusnetworks.com> wrote:
> On Wed, Jun 03, 2015 at 11:15:55AM -0700, Scott Feldman wrote:
>> On Tue, Jun 2, 2015 at 8:07 PM, Andy Gospodarek
>> <gospo@...ulusnetworks.com> wrote:
>> > This feature is only enabled with the new sysctl set (default is off):
>> > net.core.kill_routes_on_linkdown = 1
>>
>> One more thing, sorry.  This feature is typically implemented today in
>> user-space on a per-interface basis.  The example I'm thinking of is
>> Quagga's "link-detect" directive which goes on an interface.  Should
>> this be a bool on each interface in systcl?  That would let user not
>> enable on selected interfaces.
> That would not be my preference.
>
> I'm willing to investigate the per-namespace support if Hannes would
> like and add switchdev support for v2, but would prefer this not become
> that granular.


Is there a reason?  Seems you moving a feature from user space to the
kernel, so I'm curious why you wouldn't want to mimic functionality
that's available today.

I like the patch/feature, BTW.  Thanks for doing this.

-scott
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