From patchwork Tue Feb 4 17:30:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Aring X-Patchwork-Id: 1233500 Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=qwJgx5Dz; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 48BsDs6nksz9sVS for ; Wed, 5 Feb 2020 04:31:25 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727456AbgBDRbY (ORCPT ); Tue, 4 Feb 2020 12:31:24 -0500 Received: from mail-qt1-f196.google.com ([209.85.160.196]:39293 "EHLO mail-qt1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727310AbgBDRbY (ORCPT ); Tue, 4 Feb 2020 12:31:24 -0500 Received: by mail-qt1-f196.google.com with SMTP id c5so14937196qtj.6 for ; Tue, 04 Feb 2020 09:31:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=vJ/tPyfFBTjhMDBma2s8ALCTPACKNtvGZmXrnx0pUl0=; b=qwJgx5DzNfrJz1AfuzKx44xkTRAZgucpiLkXlnZCUQ8KrLy6mhJv7Ur1b+YNqaPXaV PiFxB02SYAKQ1leIU7InO58AWhabJlLX6uZ3uF6dSnNiXLtDtxMROKmCfz583f2r5Aol mARmhYBlBL0AQbbcF6AKBVTKy4+QABh+1glBtXjQUpWftTUuxwOTE/wrHUZl6jxknqM5 VaPgBuK4PMRizXwdGOhUBxMEzHez18JNUP+R/mCGNYYPQCotXr9oa06wC5pdDR6QtTLa swQgohPVQFMaIFZP/JhB72/N4NnB1XeJANPcW/bJpVWxGDx9LWylWB+1ZiftFOLT7Di+ Okpg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=vJ/tPyfFBTjhMDBma2s8ALCTPACKNtvGZmXrnx0pUl0=; b=SHSClyRqhgwcPVWvGjopzHeJLBvpjrGBD4xEg6Ov08BNweEC9LYhHfC/fKaHkk3ULl FqY3/OHJ7Cjf647kfVpnV/83OyDm5M1VygcjzN+iqwqEaQhGvbkW/zNDvDh42V8Ndc6N W6fhDqtVq32YiIuzru7wDQMV0fWmD/IVitO22Nwd+BDSxjhswqQQrt8rbF308x7ycdFj Kv+o2eJ7NNW+baH+mMDprx2GkMCBKrgWXgk4ClNAXwb0/LBzzFhP2IgmOC+nIVHEnxyx Ns4FwwWevpURD0Kd+4i75+4GOu1mB/z9sW5Yphlj+tvoiLTmLrFSFUtym5Mtzixsv+0V ZsHw== X-Gm-Message-State: APjAAAWGWzwv8OanzC3cadVIHXb1U88RSedDw+oJuDHA4ngsC/1EIAqW /42/jh3ZQ+m6vRS7FZGaSApm5N2A X-Google-Smtp-Source: APXvYqy+kqDcPKAq8dzCRFt+sKW8km99pDf+i6RVf5ckDz3ZAYSCYKQsFqFPr0Nyb/LYOYv+ilAXXg== X-Received: by 2002:ac8:4b70:: with SMTP id g16mr29330069qts.296.1580837483281; Tue, 04 Feb 2020 09:31:23 -0800 (PST) Received: from localhost.localdomain ([45.72.237.143]) by smtp.gmail.com with ESMTPSA id m54sm12466623qtf.67.2020.02.04.09.31.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Feb 2020 09:31:22 -0800 (PST) From: Alexander Aring To: davem@davemloft.net Cc: kuznet@ms2.inr.ac.ru, yoshfuji@linux-ipv6.org, kuba@kernel.org, netdev@vger.kernel.org, andrea.mayer@uniroma2.it, dav.lebrun@gmail.com, mcr@sandelman.ca, stefan@datenfreihafen.org, Alexander Aring Subject: [PATCH net 0/2] net: ipv6: seg6: headroom fixes Date: Tue, 4 Feb 2020 12:30:17 -0500 Message-Id: <20200204173019.4437-1-alex.aring@gmail.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hi netdev, This patch series fixes issues which I discovered while implementing RPL source routing for 6LoWPAN interfaces. 6LoWPAN interfaces are using a MTU of 1280 which is the IPv6 minimum MTU. I suppose this is the right fix to do that according to my explanation that tunnels which acting before L3 need to set this headroom. So far I see only segmentation route is affected to it. Maybe BPF tunnels, but it depends on the case... Maybe a comment need to be added there as well to not getting confused. If wanted I can send another patch for a comment for net-next or even net? May the variable should be renamed to l2_headroom? I splitted this fix in two patches, I only tested the first one and I think the second one. The second one should fix issues as well. Open to discuss my patches and if isn't the real fix... how we fix it? I cc'ed all necessary people and Andrea which seems to have some net-next patches around who should consider this fix in their new patches. - Alex Alexander Aring (2): net: ipv6: seg6_iptunnel: set tunnel headroom to zero net: ipv6: seg6_local: don't set headroom net/ipv6/seg6_iptunnel.c | 2 -- net/ipv6/seg6_local.c | 7 ------- 2 files changed, 9 deletions(-)