From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754616AbbCYPwF (ORCPT ); Wed, 25 Mar 2015 11:52:05 -0400 Received: from out2-smtp.messagingengine.com ([66.111.4.26]:38853 "EHLO out2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753440AbbCYPwD (ORCPT ); Wed, 25 Mar 2015 11:52:03 -0400 Message-Id: <1427298721.2344863.245111901.25E46F85@webmail.messagingengine.com> X-Sasl-Enc: tygFkuNy2WGS+s/Bq5SGv1kotDWYuXzN0/648IxYSVZd 1427298721 From: Hannes Frederic Sowa To: Roman Gushchin , "David S. Miller" , netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain X-Mailer: MessagingEngine.com Webmail Interface - ajax-f437beda In-Reply-To: <1427281679-13007-1-git-send-email-klamm@yandex-team.ru> References: <20150324.152705.921124268458994532.davem@davemloft.net> <1427281679-13007-1-git-send-email-klamm@yandex-team.ru> Subject: Re: [PATCH v2] net: sysctl for RA default route MTU Date: Wed, 25 Mar 2015 16:52:01 +0100 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 25, 2015, at 12:07, Roman Gushchin wrote: > --- a/net/ipv6/route.c > +++ b/net/ipv6/route.c > @@ -1714,6 +1714,14 @@ int ip6_route_add(struct fib6_config *cfg) > > rt->rt6i_flags = cfg->fc_flags; > > + if ((cfg->fc_flags & (RTF_ADDRCONF | RTF_DEFAULT | RTF_GATEWAY)) > == > + (RTF_ADDRCONF | RTF_DEFAULT | RTF_GATEWAY)) { > + u32 mtu = idev->cnf.ra_default_route_mtu; > + > + if (mtu && mtu >= IPV6_MIN_MTU && mtu <= idev->cnf.mtu6) > + dst_metric_set(&rt->dst, RTAX_MTU, mtu); > + } > + Could you move this RA specific snippet over to ndisc.c? Hmm How do you use this option? You use jumbo frames on the on-link network and announce all routes via route options where you also want to communicate to with jumbo frames? I wonder if an offlink_mtu parameter would be more suitable? Thanks, Hannes