linux-kernel - Re: [patch net-next 3/5] ipv6: consider net.ipv6.conf.all sysctls when making decisions

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Message-ID: <53973D42.4010209@enst-bretagne.fr>
Date:	Tue, 10 Jun 2014 19:15:46 +0200
From:	Florent Fourcot <florent.fourcot@...t-bretagne.fr>
To:	Milos Vyletel <milos.vyletel@...il.com>, davem@...emloft.net,
	amwang@...hat.com, netdev@...r.kernel.org
CC:	Oliver Neukum <oliver@...kum.org>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	stephen hemminger <stephen@...workplumber.org>,
	Pravin B Shelar <pshelar@...ira.com>,
	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	Mike Rapoport <mike.rapoport@...ellosystems.com>,
	Daniel Borkmann <dborkman@...hat.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Tom Herbert <therbert@...gle.com>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Paul Durrant <Paul.Durrant@...rix.com>,
	"open list:USB CDC ETHERNET..." <linux-usb@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [patch net-next 3/5] ipv6: consider net.ipv6.conf.all sysctls
 when making decisions

Hello,

> 
> IN6_DEV_MAXCONF
> 	IN6_DEV_HOPLIMIT
> 	IN6_DEV_MTU

I'm a little bit surprise to set the MTU as the maximum of all/dev
value. Since the default for "all" is IPV6_MIN_MTU, it is probably
harmless, but it could be a little bit surprising for administrators.

>  IN6_DEV_USE_TEMPADDR

For this one, the default is zero, except for point-to-point and
loopback, with -1. I didn't see any difference between 0 and -1 in the
current kernel code, but if I missed something, it could be a little
problem.
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