From patchwork Thu Apr 8 19:11:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Dr. David Alan Gilbert" X-Patchwork-Id: 12192435 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=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 06D7DC433B4 for ; Thu, 8 Apr 2021 20:31:34 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7EBB461151 for ; Thu, 8 Apr 2021 20:31:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7EBB461151 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:49692 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lUbJM-00063e-20 for qemu-devel@archiver.kernel.org; Thu, 08 Apr 2021 16:31:32 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54242) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lUbIQ-0005Vy-RR for qemu-devel@nongnu.org; Thu, 08 Apr 2021 16:30:34 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:54177) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lUbIK-0001SR-El for qemu-devel@nongnu.org; Thu, 08 Apr 2021 16:30:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1617913826; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=+jx7UZ9DkhQdQdY9crfTz96Mm5K6EIeFfcPjsV+jkik=; b=IXeJZwmQDfQMcV4zr9zn03ClCK3wNLlvlPj8MUnJPeqp/u2m07ZbwTHVp8qjurExaNNXhE Lv8JeKpDwDfAOKhceWPnTV0UTVyVa0AjTPSXhlbgPJ09ChfCzODczMYJmiaeEomCCo2MQY IFxl3r2cFjGpBUKtZgFcMDGMFDXLZHk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-531-joe_Kyp7NDSMF_wJVtqO_w-1; Thu, 08 Apr 2021 16:30:24 -0400 X-MC-Unique: joe_Kyp7NDSMF_wJVtqO_w-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 747981CBD20 for ; Thu, 8 Apr 2021 19:12:09 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-115-38.ams2.redhat.com [10.36.115.38]) by smtp.corp.redhat.com (Postfix) with ESMTP id 956715D9CC; Thu, 8 Apr 2021 19:12:01 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, berrange@redhat.com, kraxel@redhat.com, eblake@redhat.com, armbru@redhat.com, pabeni@redhat.com Subject: [RFC PATCH 0/5] mptcp support Date: Thu, 8 Apr 2021 20:11:54 +0100 Message-Id: <20210408191159.133644-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: quintela@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: "Dr. David Alan Gilbert" Hi, This RFC set adds support for multipath TCP (mptcp), in particular on the migration path - but should be extensible to other users. Multipath-tcp is a bit like bonding, but at L3; you can use it to handle failure, but can also use it to split traffic across multiple interfaces. Using a pair of 10Gb interfaces, I've managed to get 19Gbps (with the only tuning being using huge pages and turning the MTU up). It needs a bleeding-edge Linux kernel (in some older ones you get false accept messages for the subflows), and a C lib that has the constants defined (as current glibc does). To use it you just need to append ,mptcp to an address; -incoming tcp:0:4444,mptcp migrate -d tcp:192.168.11.20:4444,mptcp I had a quick go at trying NBD as well, but I think it needs some work with the parsing of NBD addresses. All comments welcome. Dave Dr. David Alan Gilbert (5): channel-socket: Only set CLOEXEC if we have space for fds io/net-listener: Call the notifier during finalize migration: Add cleanup hook for inwards migration migration/socket: Close the listener at the end sockets: Support multipath TCP io/channel-socket.c | 8 ++++---- io/dns-resolver.c | 2 ++ io/net-listener.c | 3 +++ migration/migration.c | 3 +++ migration/migration.h | 4 ++++ migration/multifd.c | 5 +++++ migration/socket.c | 24 ++++++++++++++++++------ qapi/sockets.json | 5 ++++- util/qemu-sockets.c | 34 ++++++++++++++++++++++++++++++++++ 9 files changed, 77 insertions(+), 11 deletions(-)