From patchwork Wed Mar 18 09:43:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Ilpo_J=C3=A4rvinen?= X-Patchwork-Id: 222317 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=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, 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 B70C2C5ACD6 for ; Wed, 18 Mar 2020 09:44:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 98DA12076F for ; Wed, 18 Mar 2020 09:44:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727640AbgCRJn7 (ORCPT ); Wed, 18 Mar 2020 05:43:59 -0400 Received: from smtp-rs2-vallila1.fe.helsinki.fi ([128.214.173.73]:51580 "EHLO smtp-rs2-vallila1.fe.helsinki.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727585AbgCRJn4 (ORCPT ); Wed, 18 Mar 2020 05:43:56 -0400 Received: from whs-18.cs.helsinki.fi (whs-18.cs.helsinki.fi [128.214.166.46]) by smtp-rs2.it.helsinki.fi (8.14.7/8.14.7) with ESMTP id 02I9hpBA012925; Wed, 18 Mar 2020 11:43:51 +0200 Received: by whs-18.cs.helsinki.fi (Postfix, from userid 1070048) id 31D2F360F45; Wed, 18 Mar 2020 11:43:51 +0200 (EET) From: =?iso-8859-1?q?Ilpo_J=E4rvinen?= To: netdev@vger.kernel.org Cc: Yuchung Cheng , Neal Cardwell , Eric Dumazet , Olivier Tilmans Subject: [RFC PATCH 28/28] tcp: AccECN sysctl documentation Date: Wed, 18 Mar 2020 11:43:32 +0200 Message-Id: <1584524612-24470-29-git-send-email-ilpo.jarvinen@helsinki.fi> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1584524612-24470-1-git-send-email-ilpo.jarvinen@helsinki.fi> References: <1584524612-24470-1-git-send-email-ilpo.jarvinen@helsinki.fi> MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Ilpo Järvinen Signed-off-by: Ilpo Järvinen --- Documentation/networking/ip-sysctl.txt | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt index 5f53faff4e25..ecca6e1d6bea 100644 --- a/Documentation/networking/ip-sysctl.txt +++ b/Documentation/networking/ip-sysctl.txt @@ -301,15 +301,21 @@ tcp_ecn - INTEGER 0 Disable ECN. Neither initiate nor accept ECN. 1 Enable ECN when requested by incoming connections and also request ECN on outgoing connection attempts. - 2 Enable ECN when requested by incoming connections + 2 Enable ECN or AccECN when requested by incoming connections but do not request ECN on outgoing connections. + 3 Enable AccECN when requested by incoming connections and + also request AccECN on outgoing connection attempts. + 0x102 Enable AccECN in optionless mode for incoming connections. + 0x103 Enable AccECN in optionless mode for incoming and outgoing + connections. Default: 2 tcp_ecn_fallback - BOOLEAN If the kernel detects that ECN connection misbehaves, enable fall back to non-ECN. Currently, this knob implements the fallback - from RFC3168, section 6.1.1.1., but we reserve that in future, - additional detection mechanisms could be implemented under this + from RFC3168, section 6.1.1.1., as well as the ECT codepoint mangling + detection during the Accurate ECN handshake, but we reserve that in + future, additional detection mechanisms could be implemented under this knob. The value is not used, if tcp_ecn or per route (or congestion control) ECN settings are disabled. Default: 1 (fallback enabled)