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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 47AE7C2D0DB for ; Tue, 28 Jan 2020 13:58:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 10B2B24683 for ; Tue, 28 Jan 2020 13:58:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580219922; bh=WMTiwS7kIAwrMNqij8xPX1ZnmfbNjk+m9lD/MWljEfA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=2O+2MikbMX8gp7ndgpK7q0txgIohEQQHHYdgMlWaU4QI96MH7+kZM5Kh6xm1SyYVC piueNgf8ED+G7hFZoWvxjhFnVRmezz/sI9xh+QLOsQd3hnvv1KGU+wUdnCtWhGuTHO 9i7o+KiAufx/6p1w/6IPYz1nLyVFxNReT8GOVFR0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726512AbgA1N6l (ORCPT ); Tue, 28 Jan 2020 08:58:41 -0500 Received: from mail.kernel.org ([198.145.29.99]:43384 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726107AbgA1N6g (ORCPT ); Tue, 28 Jan 2020 08:58:36 -0500 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 2004024685; Tue, 28 Jan 2020 13:58:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580219915; bh=WMTiwS7kIAwrMNqij8xPX1ZnmfbNjk+m9lD/MWljEfA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kwBM2A0vM4dZXkcn3mynxHZ4lUkFT1+UYjGq6MHfMQ2XO/7V0xf31Y0CMi2F3UioX Xve0L3PBxlsxD/iB+t6qYRQ/IqRoysmS1/m6yt43YxMv87OXs/lKpeammu9Gh9QLfe I2hE/BCumuPa8+aSoibSxmXdpX35ZdmWUlH5rPpw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yuki Taguchi , "David S. Miller" Subject: [PATCH 4.14 04/46] ipv6: sr: remove SKB_GSO_IPXIP6 on End.D* actions Date: Tue, 28 Jan 2020 14:57:38 +0100 Message-Id: <20200128135750.628101967@linuxfoundation.org> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200128135749.822297911@linuxfoundation.org> References: <20200128135749.822297911@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: Yuki Taguchi [ Upstream commit 62ebaeaedee7591c257543d040677a60e35c7aec ] After LRO/GRO is applied, SRv6 encapsulated packets have SKB_GSO_IPXIP6 feature flag, and this flag must be removed right after decapulation procedure. Currently, SKB_GSO_IPXIP6 flag is not removed on End.D* actions, which creates inconsistent packet state, that is, a normal TCP/IP packets have the SKB_GSO_IPXIP6 flag. This behavior can cause unexpected fallback to GSO on routing to netdevices that do not support SKB_GSO_IPXIP6. For example, on inter-VRF forwarding, decapsulated packets separated into small packets by GSO because VRF devices do not support TSO for packets with SKB_GSO_IPXIP6 flag, and this degrades forwarding performance. This patch removes encapsulation related GSO flags from the skb right after the End.D* action is applied. Fixes: d7a669dd2f8b ("ipv6: sr: add helper functions for seg6local") Signed-off-by: Yuki Taguchi Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv6/seg6_local.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/net/ipv6/seg6_local.c +++ b/net/ipv6/seg6_local.c @@ -27,6 +27,7 @@ #include #include #include +#include #ifdef CONFIG_IPV6_SEG6_HMAC #include #endif @@ -126,7 +127,8 @@ static bool decap_and_validate(struct sk skb_reset_network_header(skb); skb_reset_transport_header(skb); - skb->encapsulation = 0; + if (iptunnel_pull_offloads(skb)) + return false; return true; }