From patchwork Thu Apr 8 19:11:59 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: 12192433 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=-15.8 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 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 4E3BFC433B4 for ; Thu, 8 Apr 2021 20:29:09 +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 C54AE61151 for ; Thu, 8 Apr 2021 20:29:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C54AE61151 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]:47370 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lUbH1-0004y1-Tk for qemu-devel@archiver.kernel.org; Thu, 08 Apr 2021 16:29:07 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52980) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lUbEq-0002za-JF for qemu-devel@nongnu.org; Thu, 08 Apr 2021 16:26:52 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:57064) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lUbEe-0007Ve-It for qemu-devel@nongnu.org; Thu, 08 Apr 2021 16:26:52 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1617913599; 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: in-reply-to:in-reply-to:references:references; bh=6v0ufZEPZNlTZ23gcFAWmj+A0YVzmAbagmcB2GekwNE=; b=F0wTO25uWCx9/kiIftGzuTkit3//rHQSxKf5cEJoS+Y9RBKAyOGAAZu6F+14AW6nmSOZLh zEVezR9+kQvqN5SHaZ6WsEymX//k7PuAoVl9n25dJw9jVrXe9cmWBWRhRxVzhGeg9lgCkD ZiNkn+hAJcJCMcBW8R8C/h4Upo1NTDI= 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-162-p1OaxaUYODqXYV3dCcFaZg-1; Thu, 08 Apr 2021 16:26:38 -0400 X-MC-Unique: p1OaxaUYODqXYV3dCcFaZg-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 EA6221CC2CF for ; Thu, 8 Apr 2021 19:12:34 +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 2A5BF5D9CC; Thu, 8 Apr 2021 19:12:30 +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 5/5] sockets: Support multipath TCP Date: Thu, 8 Apr 2021 20:11:59 +0100 Message-Id: <20210408191159.133644-6-dgilbert@redhat.com> In-Reply-To: <20210408191159.133644-1-dgilbert@redhat.com> References: <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=170.10.133.124; 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" Multipath TCP allows combining multiple interfaces/routes into a single socket, with very little work for the user/admin. It's enabled by 'mptcp' on most socket addresses: ./qemu-system-x86_64 -nographic -incoming tcp:0:4444,mptcp Signed-off-by: Dr. David Alan Gilbert --- io/dns-resolver.c | 2 ++ qapi/sockets.json | 5 ++++- util/qemu-sockets.c | 34 ++++++++++++++++++++++++++++++++++ 3 files changed, 40 insertions(+), 1 deletion(-) diff --git a/io/dns-resolver.c b/io/dns-resolver.c index 743a0efc87..b081e098bb 100644 --- a/io/dns-resolver.c +++ b/io/dns-resolver.c @@ -122,6 +122,8 @@ static int qio_dns_resolver_lookup_sync_inet(QIODNSResolver *resolver, .ipv4 = iaddr->ipv4, .has_ipv6 = iaddr->has_ipv6, .ipv6 = iaddr->ipv6, + .has_mptcp = iaddr->has_mptcp, + .mptcp = iaddr->mptcp, }; (*addrs)[i] = newaddr; diff --git a/qapi/sockets.json b/qapi/sockets.json index 2e83452797..43122a38bf 100644 --- a/qapi/sockets.json +++ b/qapi/sockets.json @@ -57,6 +57,8 @@ # @keep-alive: enable keep-alive when connecting to this socket. Not supported # for passive sockets. (Since 4.2) # +# @mptcp: enable multi-path TCP. (Since 6.0) +# # Since: 1.3 ## { 'struct': 'InetSocketAddress', @@ -66,7 +68,8 @@ '*to': 'uint16', '*ipv4': 'bool', '*ipv6': 'bool', - '*keep-alive': 'bool' } } + '*keep-alive': 'bool', + '*mptcp': 'bool' } } ## # @UnixSocketAddress: diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c index 8af0278f15..72527972d5 100644 --- a/util/qemu-sockets.c +++ b/util/qemu-sockets.c @@ -206,6 +206,21 @@ static int try_bind(int socket, InetSocketAddress *saddr, struct addrinfo *e) #endif } +static int check_mptcp(const InetSocketAddress *saddr, struct addrinfo *ai, + Error **errp) +{ + if (saddr->has_mptcp && saddr->mptcp) { +#ifdef IPPROTO_MPTCP + ai->ai_protocol = IPPROTO_MPTCP; +#else + error_setg(errp, "MPTCP unavailable in this build"); + return -1; +#endif + } + + return 0; +} + static int inet_listen_saddr(InetSocketAddress *saddr, int port_offset, int num, @@ -278,6 +293,11 @@ static int inet_listen_saddr(InetSocketAddress *saddr, /* create socket + bind/listen */ for (e = res; e != NULL; e = e->ai_next) { + if (check_mptcp(saddr, e, &err)) { + error_propagate(errp, err); + return -1; + } + getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen, uaddr,INET6_ADDRSTRLEN,uport,32, NI_NUMERICHOST | NI_NUMERICSERV); @@ -456,6 +476,11 @@ int inet_connect_saddr(InetSocketAddress *saddr, Error **errp) for (e = res; e != NULL; e = e->ai_next) { error_free(local_err); local_err = NULL; + + if (check_mptcp(saddr, e, &local_err)) { + break; + } + sock = inet_connect_addr(saddr, e, &local_err); if (sock >= 0) { break; @@ -687,6 +712,15 @@ int inet_parse(InetSocketAddress *addr, const char *str, Error **errp) } addr->has_keep_alive = true; } + begin = strstr(optstr, ",mptcp"); + if (begin) { + if (inet_parse_flag("mptcp", begin + strlen(",mptcp"), + &addr->mptcp, errp) < 0) + { + return -1; + } + addr->has_mptcp = true; + } return 0; }