From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08232C433EF for ; Wed, 23 Feb 2022 08:25:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238925AbiBWIZp (ORCPT ); Wed, 23 Feb 2022 03:25:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231350AbiBWIZo (ORCPT ); Wed, 23 Feb 2022 03:25:44 -0500 Received: from a.mx.secunet.com (a.mx.secunet.com [62.96.220.36]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 774B35AED0; Wed, 23 Feb 2022 00:25:15 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by a.mx.secunet.com (Postfix) with ESMTP id 0358B20527; Wed, 23 Feb 2022 09:25:12 +0100 (CET) X-Virus-Scanned: by secunet Received: from a.mx.secunet.com ([127.0.0.1]) by localhost (a.mx.secunet.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jC4y_vDuKg4B; Wed, 23 Feb 2022 09:25:11 +0100 (CET) Received: from mailout2.secunet.com (mailout2.secunet.com [62.96.220.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by a.mx.secunet.com (Postfix) with ESMTPS id 86DF220519; Wed, 23 Feb 2022 09:25:11 +0100 (CET) Received: from cas-essen-01.secunet.de (unknown [10.53.40.201]) by mailout2.secunet.com (Postfix) with ESMTP id 7E9BB80004A; Wed, 23 Feb 2022 09:25:11 +0100 (CET) Received: from mbx-essen-01.secunet.de (10.53.40.197) by cas-essen-01.secunet.de (10.53.40.201) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.18; Wed, 23 Feb 2022 09:25:11 +0100 Received: from gauss2.secunet.de (10.182.7.193) by mbx-essen-01.secunet.de (10.53.40.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.18; Wed, 23 Feb 2022 09:25:10 +0100 Received: by gauss2.secunet.de (Postfix, from userid 1000) id 8C8803180FB1; Wed, 23 Feb 2022 09:25:10 +0100 (CET) Date: Wed, 23 Feb 2022 09:25:10 +0100 From: Steffen Klassert To: Lina Wang CC: Herbert Xu , "David S . Miller" , Hideaki YOSHIFUJI , "David Ahern" , Jakub Kicinski , "Matthias Brugger" , , , Subject: Re: [PATCH] xfrm: fix tunnel model fragmentation behavior Message-ID: <20220223082510.GL17351@gauss3.secunet.de> References: <20220221110405.GJ1223722@gauss3.secunet.de> <20220222021803.27965-1-lina.wang@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20220222021803.27965-1-lina.wang@mediatek.com> X-ClientProxiedBy: cas-essen-02.secunet.de (10.53.40.202) To mbx-essen-01.secunet.de (10.53.40.197) X-EXCLAIMER-MD-CONFIG: 2c86f778-e09b-4440-8b15-867914633a10 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 22, 2022 at 10:18:04AM +0800, Lina Wang wrote: > On Mon, 2022-02-21 at 12:04 +0100, Steffen Klassert wrote: > > On Mon, Feb 21, 2022 at 01:16:48PM +0800, Lina Wang wrote: > > > in tunnel mode, if outer interface(ipv4) is less, it is easily to > We have two commits in the ipsec tree that address a very similar > > issue. That is: > > > > commit 6596a0229541270fb8d38d989f91b78838e5e9da > > xfrm: fix MTU regression > > > > and > > > > commit a6d95c5a628a09be129f25d5663a7e9db8261f51 > > Revert "xfrm: xfrm_state_mtu should return at least 1280 for ipv6" > > > > Can you please doublecheck that the issue you are fixing still > > exist in the ipsec tree? > > Yes, I know the two patches, which didnot help for my scenary. Whatever > commit a6d95c5a62 exist or not, there still is double fragment issue. From > commit 6596a022's mail thread, owner has met double fragment issue, I am > not sure if it is the same with mine. Thanks for the doublecking this!