netdev - Re: [PATCH net-next] ipv6: allow userspace to add IFA_F

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Message-ID: <20180227232218.GA2574@bistromath.localdomain>
Date:   Wed, 28 Feb 2018 00:22:18 +0100
From:   Sabrina Dubroca <sd@...asysnail.net>
To:     David Miller <davem@...emloft.net>
Cc:     dsahern@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] ipv6: allow userspace to add IFA_F_OPTIMISTIC
 addresses

2018-02-27, 10:47:08 -0500, David Miller wrote:
> From: Sabrina Dubroca <sd@...asysnail.net>
> Date: Tue, 27 Feb 2018 15:13:28 +0100
> 
> > 2018-02-26, 12:11:27 -0500, David Miller wrote:
> >> From: Sabrina Dubroca <sd@...asysnail.net>
> >> Date: Mon, 26 Feb 2018 17:56:19 +0100
> >> 
> >> That's completely different to this case, which is a bonfide explicit
> >> allowance for userspace to take over these fundamental protocol tasks
> >> from the kernel.
> > 
> > This is not letting userspace take over. On the contrary, it allows
> > userspace to take advantage of the kernel's DAD, without suffering the
> > delay. The alternative, without optimistic DAD, would be to completely
> > disable DAD done by the kernel.
> > 
> > This follows RFC 4429, which explicitly allows optimistic DAD for
> > addresses generated by (among other mechanisms) DHCPv6.
> 
> Fair enough.
> 
> We can resume this conversation if and when problems pop up in the
> future :-)

Hehe :)

Thanks, I'll submit a v2 with the changes (the other) David asked for.

-- 
Sabrina