From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roopa Prabhu Subject: Re: [PATCH net-next 1/1] ipv6: sr: add option to control lwtunnel support Date: Wed, 23 Nov 2016 06:57:44 -0800 Message-ID: <5835AE68.3060003@cumulusnetworks.com> References: <5835466B.6080405@cumulusnetworks.com> <5835613D.8070104@uclouvain.be> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Alexei Starovoitov , David Miller , "netdev@vger.kernel.org" , Lorenzo Colitti , Eric Dumazet To: David Lebrun Return-path: Received: from mail-pf0-f169.google.com ([209.85.192.169]:34834 "EHLO mail-pf0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S937116AbcKWO7Q (ORCPT ); Wed, 23 Nov 2016 09:59:16 -0500 Received: by mail-pf0-f169.google.com with SMTP id i88so3986247pfk.2 for ; Wed, 23 Nov 2016 06:57:45 -0800 (PST) In-Reply-To: <5835613D.8070104@uclouvain.be> Sender: netdev-owner@vger.kernel.org List-ID: On 11/23/16, 1:28 AM, David Lebrun wrote: > On 11/23/2016 08:34 AM, Roopa Prabhu wrote: >> I can't seem to reproduce the problem you are seeing. still trying.. >> I don't have CONFIG_LWTUNNEL set nor any of the other SEG6 configs. >> My CONFIG_IPV6 is on and compiled as a module. I have also tried disabling it. >> If you can send me the config, I can try again. Looking back at the patches, >> I do see a few things below ..but they may not fix your problem directly. >> >> Though I had none of the ipv6 segment routing configs turned on, >> I do see the "Segment Routing with IPv6" msg at bootup. >> Was looking at david's patches again, and a few things (I had missed seeing the last version): >> >> In my review comment I was hinting at CONFIG_IPV6_SEG6 to cover all of ipv6 segment routing, >> including the lwtunnel bits. >> >> something like below: >> >> config IPV6_SEG6 >> bool "IPv6: Segment Routing Header encapsulation support" >> depends on LWTUNNEL && IPV6 >> >> DavidL, do you see a problem doing it this way ?. with this 'seg6.o' will be part of CONFIG_IPV6_SEG6 and not >> get initialized unless it is enabled..which seems like the right thing to do. > Can't reproduce the bug either, with CONFIG_IPV6=y, LWTUNNEL=n and all > SEG6 disabled. Alexei, your .config and dmesg log could help. > > Roopa, the reason why seg6.o is compiled by default is that it provides > an interface to control HMAC structures, and that HMAC does not depends > on lwtunnels and can be used in the extension header processing (which > is compiled by default). I could indeed add another option to > conditionnally compile seg6.o if HMAC is enabled etc, and I actually had > something like that in the very first versions of the patch, but I > received comments that too much options is not a good thing (and I agree > with that). okay then. I agree with not having too many option. I had just thought that it could live with the existing CONFIG_IPV6_SEG6_LWTUNNEL if it was renamed. had not looked at the HMAC dependency.