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=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 D88C0C433E1 for ; Thu, 20 Aug 2020 09:59:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B628322CAF for ; Thu, 20 Aug 2020 09:59:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597917577; bh=eBXCDnZNWilzhj/f7V2+co07FctdFNJ0+O2jix7pLkw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tLhTgdOHNTXSDhMCUvpkAYI6cp/B4xGT89X90sTs4ODLT5M0TJGhw/98NurnVA6b9 JbzKRPn8fmxqQkxM2E9eGnO/fUekULv1Kcx0x/GZJkwHZDMYsxUjFxT1ILgiJq1ktV o5/Y6Gnl5FhbRWhJAC+ugX3hMHfFwLyHF9uce174= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730276AbgHTJ7f (ORCPT ); Thu, 20 Aug 2020 05:59:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:45580 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730426AbgHTJ7Y (ORCPT ); Thu, 20 Aug 2020 05:59:24 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C01C920855; Thu, 20 Aug 2020 09:59:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597917564; bh=eBXCDnZNWilzhj/f7V2+co07FctdFNJ0+O2jix7pLkw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ji46omPIxEHL57uJPohmIoJviIAlV+m4fl7Fz1npPTYniohWHwIlvqU5vWOJQYq52 9CFdrb1bj7olJiaUkwuET0ZBdCEdUmjjj580kPOc90HaIzk8sm+LzSh5XLpB4x3zC+ JxYTywTXj/8KWwOIq144C4R3ifhyIZrT/OC4D04U= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hangbin Liu , Guillaume Nault , "David S. Miller" Subject: [PATCH 4.9 076/212] Revert "vxlan: fix tos value before xmit" Date: Thu, 20 Aug 2020 11:20:49 +0200 Message-Id: <20200820091606.207508915@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200820091602.251285210@linuxfoundation.org> References: <20200820091602.251285210@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hangbin Liu [ Upstream commit a0dced17ad9dc08b1b25e0065b54c97a318e6e8b ] This reverts commit 71130f29979c7c7956b040673e6b9d5643003176. In commit 71130f29979c ("vxlan: fix tos value before xmit") we want to make sure the tos value are filtered by RT_TOS() based on RFC1349. 0 1 2 3 4 5 6 7 +-----+-----+-----+-----+-----+-----+-----+-----+ | PRECEDENCE | TOS | MBZ | +-----+-----+-----+-----+-----+-----+-----+-----+ But RFC1349 has been obsoleted by RFC2474. The new DSCP field defined like 0 1 2 3 4 5 6 7 +-----+-----+-----+-----+-----+-----+-----+-----+ | DS FIELD, DSCP | ECN FIELD | +-----+-----+-----+-----+-----+-----+-----+-----+ So with IPTOS_TOS_MASK 0x1E RT_TOS(tos) ((tos)&IPTOS_TOS_MASK) the first 3 bits DSCP info will get lost. To take all the DSCP info in xmit, we should revert the patch and just push all tos bits to ip_tunnel_ecn_encap(), which will handling ECN field later. Fixes: 71130f29979c ("vxlan: fix tos value before xmit") Signed-off-by: Hangbin Liu Acked-by: Guillaume Nault Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/vxlan.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2110,7 +2110,7 @@ static void vxlan_xmit_one(struct sk_buf else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) df = htons(IP_DF); - tos = ip_tunnel_ecn_encap(RT_TOS(tos), old_iph, skb); + tos = ip_tunnel_ecn_encap(tos, old_iph, skb); ttl = ttl ? : ip4_dst_hoplimit(&rt->dst); err = vxlan_build_skb(skb, &rt->dst, sizeof(struct iphdr), vni, md, flags, udp_sum); @@ -2169,7 +2169,7 @@ static void vxlan_xmit_one(struct sk_buf if (!info) udp_sum = !(flags & VXLAN_F_UDP_ZERO_CSUM6_TX); - tos = ip_tunnel_ecn_encap(RT_TOS(tos), old_iph, skb); + tos = ip_tunnel_ecn_encap(tos, old_iph, skb); ttl = ttl ? : ip6_dst_hoplimit(ndst); skb_scrub_packet(skb, xnet); err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),