From patchwork Thu Jan 2 22:08:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 234577 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=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 C8591C3276E for ; Thu, 2 Jan 2020 22:49:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9265E20848 for ; Thu, 2 Jan 2020 22:49:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578005366; bh=MAti0OlISvYe2Sbp3dLgsxncdP9uwIFvy9lyu826KbQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jsITMZZiGsqZISIxyXxDXVgcBdxQprNT/RaCx+q9v3cJnjZwKxyoLSOBj/JOBCSMC Et0prTT2Smr6zyTIsPalRSFXLDD5J8H/rkCil2yJZDPWQLiB13xgTxhwErqXcmnxIe ftyEL9//8GqHr1HcMGoOK+VDoWIJoCu9XWNSbzuc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728733AbgABWtW (ORCPT ); Thu, 2 Jan 2020 17:49:22 -0500 Received: from mail.kernel.org ([198.145.29.99]:54640 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728857AbgABW0w (ORCPT ); Thu, 2 Jan 2020 17:26:52 -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 C0BF220863; Thu, 2 Jan 2020 22:26:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1578004012; bh=MAti0OlISvYe2Sbp3dLgsxncdP9uwIFvy9lyu826KbQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wxa9ml2EKf7CP8p9U1A44ovzyenVPj++OLl/D4z7EjxUPOAuhl0eKbRdCPaoUVfx2 rt6uWfzGz+wKdhTXWnlinRMAy+VqaHOfkQHHCmiJlOq5wI5nfSN7nxRKu0hVtfOVf+ 71dx6pznoIRFi26C8Roqcr1L4JW2O6biNkbBhc9I= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Guillaume Nault , David Ahern , Hangbin Liu , "David S. Miller" Subject: [PATCH 4.14 85/91] sit: do not confirm neighbor when do pmtu update Date: Thu, 2 Jan 2020 23:08:07 +0100 Message-Id: <20200102220451.506717250@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200102220356.856162165@linuxfoundation.org> References: <20200102220356.856162165@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Hangbin Liu [ Upstream commit 4d42df46d6372ece4cb4279870b46c2ea7304a47 ] When do IPv6 tunnel PMTU update and calls __ip6_rt_update_pmtu() in the end, we should not call dst_confirm_neigh() as there is no two-way communication. v5: No change. v4: No change. v3: Do not remove dst_confirm_neigh, but add a new bool parameter in dst_ops.update_pmtu to control whether we should do neighbor confirm. Also split the big patch to small ones for each area. v2: Remove dst_confirm_neigh in __ip6_rt_update_pmtu. Reviewed-by: Guillaume Nault Acked-by: David Ahern Signed-off-by: Hangbin Liu Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv6/sit.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -932,7 +932,7 @@ static netdev_tx_t ipip6_tunnel_xmit(str } if (tunnel->parms.iph.daddr) - skb_dst_update_pmtu(skb, mtu); + skb_dst_update_pmtu_no_confirm(skb, mtu); if (skb->len > mtu && !skb_is_gso(skb)) { icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);