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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E7FEC433E0 for ; Thu, 18 Jun 2020 01:56:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5C85C21924 for ; Thu, 18 Jun 2020 01:56:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592445400; bh=sZmVJGsjm8cOiF6qnbE+FPMSghI7+8vyht/2sURNHl8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=NDtBDlWUuC/4EYy/bxq7C5XcSUSFD9lrp3mXI41TV9dOi0YnjwIQHCLns6MBk6ndY Rowr3Q7ua3DEx6uygQoy53aIP2kJisO0TaN57q2ocasFh5NvBdaf8823nFi+qAubFP kkRvHI0wxnoWZPaZyRP7tARcWebFZ8PLjzuEYKvo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733276AbgFRB4j (ORCPT ); Wed, 17 Jun 2020 21:56:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:60566 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731421AbgFRBZW (ORCPT ); Wed, 17 Jun 2020 21:25:22 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 24D902088E; Thu, 18 Jun 2020 01:25:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592443521; bh=sZmVJGsjm8cOiF6qnbE+FPMSghI7+8vyht/2sURNHl8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2o1iY9CQ7QDIbQyT/IfPLAWWH0drB/4xQN15Mdg9MW3tZgzhH47c/bu6hJD8ypOEH Xjg4y0T2xa8Hh7DET2Qf/xEZdObJM4LPxQhSA349h6kNJT7knxqzWb3gG9aR3D3Cev OLRS9Gti8hmpqA78zpbARbR/JuW/zMQrKF0Vmyvk= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Jiri Benc , "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 144/172] geneve: change from tx_error to tx_dropped on missing metadata Date: Wed, 17 Jun 2020 21:21:50 -0400 Message-Id: <20200618012218.607130-144-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200618012218.607130-1-sashal@kernel.org> References: <20200618012218.607130-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jiri Benc [ Upstream commit 9d149045b3c0e44c049cdbce8a64e19415290017 ] If the geneve interface is in collect_md (external) mode, it can't send any packets submitted directly to its net interface, as such packets won't have metadata attached. This is expected. However, the kernel itself sends some packets to the interface, most notably, IPv6 DAD, IPv6 multicast listener reports, etc. This is not wrong, as tunnel metadata can be specified in routing table (although technically, that has never worked for IPv6, but hopefully will be fixed eventually) and then the interface must correctly participate in IPv6 housekeeping. The problem is that any such attempt increases the tx_error counter. Just bringing up a geneve interface with IPv6 enabled is enough to see a number of tx_errors. That causes confusion among users, prompting them to find a network error where there is none. Change the counter used to tx_dropped. That better conveys the meaning (there's nothing wrong going on, just some packets are getting dropped) and hopefully will make admins panic less. Signed-off-by: Jiri Benc Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/geneve.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index 36444de701cd..817c290b78cd 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -911,9 +911,10 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) if (geneve->collect_md) { info = skb_tunnel_info(skb); if (unlikely(!info || !(info->mode & IP_TUNNEL_INFO_TX))) { - err = -EINVAL; netdev_dbg(dev, "no tunnel metadata\n"); - goto tx_error; + dev_kfree_skb(skb); + dev->stats.tx_dropped++; + return NETDEV_TX_OK; } } else { info = &geneve->info; @@ -930,7 +931,7 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) if (likely(!err)) return NETDEV_TX_OK; -tx_error: + dev_kfree_skb(skb); if (err == -ELOOP) -- 2.25.1