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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 AE984C433ED for ; Mon, 12 Apr 2021 08:57:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 861816127B for ; Mon, 12 Apr 2021 08:57:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238057AbhDLI5o (ORCPT ); Mon, 12 Apr 2021 04:57:44 -0400 Received: from mail.kernel.org ([198.145.29.99]:44892 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239048AbhDLIzb (ORCPT ); Mon, 12 Apr 2021 04:55:31 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 11EFC61245; Mon, 12 Apr 2021 08:55:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1618217713; bh=L2/wIxA0VNRiBEfuNvmkJJR9argvn/xdG5rpvNfbbmo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=m48qLx/XQ3h+AJLQ5mKBrYjtpT4bRHdzti/uhI7Ed1cZig6WR/+w16r/nzXsrZjnH 9yPZBVkLF7o2gOGMjXKFp3MXjd6zXGhfXAWpeDHldxGBxUz4i2lxmen1zmrpIp56Tq tuu+xR7coG1X4D9mxg+sdy4WtH9doT8L/erYGXP8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ido Schimmel , Petr Machata , =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= , "David S. Miller" , Sasha Levin Subject: [PATCH 5.10 118/188] mlxsw: spectrum: Fix ECN marking in tunnel decapsulation Date: Mon, 12 Apr 2021 10:40:32 +0200 Message-Id: <20210412084017.578271985@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210412084013.643370347@linuxfoundation.org> References: <20210412084013.643370347@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Ido Schimmel [ Upstream commit 66167c310deb4ac1725f81004fb4b504676ad0bf ] Cited commit changed the behavior of the software data path with regards to the ECN marking of decapsulated packets. However, the commit did not change other callers of __INET_ECN_decapsulate(), namely mlxsw. The driver is using the function in order to ensure that the hardware and software data paths act the same with regards to the ECN marking of decapsulated packets. The discrepancy was uncovered by commit 5aa3c334a449 ("selftests: forwarding: vxlan_bridge_1d: Fix vxlan ecn decapsulate value") that aligned the selftest to the new behavior. Without this patch the selftest passes when used with veth pairs, but fails when used with mlxsw netdevs. Fix this by instructing the device to propagate the ECT(1) mark from the outer header to the inner header when the inner header is ECT(0), for both NVE and IP-in-IP tunnels. A helper is added in order not to duplicate the code between both tunnel types. Fixes: b723748750ec ("tunnel: Propagate ECT(1) when decapsulating as recommended by RFC6040") Signed-off-by: Ido Schimmel Reviewed-by: Petr Machata Acked-by: Toke Høiland-Jørgensen Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/mellanox/mlxsw/spectrum.h | 15 +++++++++++++++ .../net/ethernet/mellanox/mlxsw/spectrum_ipip.c | 7 +++---- .../net/ethernet/mellanox/mlxsw/spectrum_nve.c | 7 +++---- 3 files changed, 21 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h index 74b3959b36d4..3e7576e671df 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h @@ -20,6 +20,7 @@ #include #include #include +#include #include "port.h" #include "core.h" @@ -345,6 +346,20 @@ struct mlxsw_sp_port_type_speed_ops { u32 (*ptys_proto_cap_masked_get)(u32 eth_proto_cap); }; +static inline u8 mlxsw_sp_tunnel_ecn_decap(u8 outer_ecn, u8 inner_ecn, + bool *trap_en) +{ + bool set_ce = false; + + *trap_en = !!__INET_ECN_decapsulate(outer_ecn, inner_ecn, &set_ce); + if (set_ce) + return INET_ECN_CE; + else if (outer_ecn == INET_ECN_ECT_1 && inner_ecn == INET_ECN_ECT_0) + return INET_ECN_ECT_1; + else + return inner_ecn; +} + static inline struct net_device * mlxsw_sp_bridge_vxlan_dev_find(struct net_device *br_dev) { diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c index a8525992528f..3262a2c15ea7 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c @@ -371,12 +371,11 @@ static int mlxsw_sp_ipip_ecn_decap_init_one(struct mlxsw_sp *mlxsw_sp, u8 inner_ecn, u8 outer_ecn) { char tidem_pl[MLXSW_REG_TIDEM_LEN]; - bool trap_en, set_ce = false; u8 new_inner_ecn; + bool trap_en; - trap_en = __INET_ECN_decapsulate(outer_ecn, inner_ecn, &set_ce); - new_inner_ecn = set_ce ? INET_ECN_CE : inner_ecn; - + new_inner_ecn = mlxsw_sp_tunnel_ecn_decap(outer_ecn, inner_ecn, + &trap_en); mlxsw_reg_tidem_pack(tidem_pl, outer_ecn, inner_ecn, new_inner_ecn, trap_en, trap_en ? MLXSW_TRAP_ID_DECAP_ECN0 : 0); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tidem), tidem_pl); diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve.c index 54d3e7dcd303..a2d1b95d1f58 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_nve.c @@ -909,12 +909,11 @@ static int __mlxsw_sp_nve_ecn_decap_init(struct mlxsw_sp *mlxsw_sp, u8 inner_ecn, u8 outer_ecn) { char tndem_pl[MLXSW_REG_TNDEM_LEN]; - bool trap_en, set_ce = false; u8 new_inner_ecn; + bool trap_en; - trap_en = !!__INET_ECN_decapsulate(outer_ecn, inner_ecn, &set_ce); - new_inner_ecn = set_ce ? INET_ECN_CE : inner_ecn; - + new_inner_ecn = mlxsw_sp_tunnel_ecn_decap(outer_ecn, inner_ecn, + &trap_en); mlxsw_reg_tndem_pack(tndem_pl, outer_ecn, inner_ecn, new_inner_ecn, trap_en, trap_en ? MLXSW_TRAP_ID_DECAP_ECN0 : 0); return mlxsw_reg_write(mlxsw_sp->core, MLXSW_REG(tndem), tndem_pl); -- 2.30.2