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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 94575C433FE for ; Mon, 3 Jan 2022 09:09:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232302AbiACJJJ (ORCPT ); Mon, 3 Jan 2022 04:09:09 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:41388 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S230515AbiACJJI (ORCPT ); Mon, 3 Jan 2022 04:09:08 -0500 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 2037Rxan028830; Mon, 3 Jan 2022 09:09:04 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=message-id : date : mime-version : subject : to : cc : references : from : in-reply-to : content-type : content-transfer-encoding; s=pp1; bh=glghL1iPQhHGW1OByj7w1LqP5lccxcuTD5PDTNX9yyU=; b=pnX9cG6/0swQNPjJG+FldCpuE4GR2sCs0M5Xb39WvH29O6jDRlJ2/OWYNQ7VlccYalYk c6FFDqATCGL8GerCyBYya4AzvcPiCfSEMzg0hKjFTMScgWbROhArgwygcHqe3sjtNsrG kz+/BktZ5aKrtcQaVGwGIfKra3endhdhHBxjgWXgRy7MhWJzt8lmmTdk8MeP+l05VZXI ZtnC3fRkhIWBK7iM2O1YtKOQMt4PLV3ZrToV/M3UdbFxfbdB59BO5cZPuauvIDgUI3Gv /yx1yeTWva/h5maRoAIlWvC7VK/v94du2coxvHBRJZ1mDMDmLJl4YXySKnk9ju9/AC/V qw== Received: from pps.reinject (localhost [127.0.0.1]) by mx0b-001b2d01.pphosted.com with ESMTP id 3dbrpxnk8t-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 03 Jan 2022 09:09:03 +0000 Received: from m0098419.ppops.net (m0098419.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 20398Fsa001783; Mon, 3 Jan 2022 09:09:03 GMT Received: from ppma05fra.de.ibm.com (6c.4a.5195.ip4.static.sl-reverse.com [149.81.74.108]) by mx0b-001b2d01.pphosted.com with ESMTP id 3dbrpxnk89-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 03 Jan 2022 09:09:03 +0000 Received: from pps.filterd (ppma05fra.de.ibm.com [127.0.0.1]) by ppma05fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 20398Snu022513; Mon, 3 Jan 2022 09:09:01 GMT Received: from b06avi18626390.portsmouth.uk.ibm.com (b06avi18626390.portsmouth.uk.ibm.com [9.149.26.192]) by ppma05fra.de.ibm.com with ESMTP id 3daek98ka2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 03 Jan 2022 09:09:01 +0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 20390GpU46727588 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 3 Jan 2022 09:00:16 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 03A2D11C05B; Mon, 3 Jan 2022 09:08:59 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id ABFDD11C04C; Mon, 3 Jan 2022 09:08:58 +0000 (GMT) Received: from [9.145.23.206] (unknown [9.145.23.206]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 3 Jan 2022 09:08:58 +0000 (GMT) Message-ID: Date: Mon, 3 Jan 2022 10:09:08 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.4.1 Subject: Re: [PATCH net-next] net/smc: Introduce TCP ULP support Content-Language: en-US To: Tony Lu Cc: kuba@kernel.org, davem@davemloft.net, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org References: <20211228134435.41774-1-tonylu@linux.alibaba.com> <97ea52de-5419-22ee-7f55-b92887dcaada@linux.ibm.com> From: Karsten Graul Organization: IBM Deutschland Research & Development GmbH In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: tAvGpqNbU2ILu_ld-jFezBByO7L-g4jp X-Proofpoint-ORIG-GUID: 9oYEa_zbgrcpWgdoiv8Rxg_OszzBbS8u X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2022-01-03_03,2022-01-01_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 spamscore=0 lowpriorityscore=0 phishscore=0 clxscore=1015 priorityscore=1501 mlxscore=0 malwarescore=0 mlxlogscore=883 impostorscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2201030061 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 31/12/2021 10:13, Tony Lu wrote: > On Thu, Dec 30, 2021 at 04:03:19PM +0100, Karsten Graul wrote: >> On 28/12/2021 14:44, Tony Lu wrote: >>> This implements TCP ULP for SMC, helps applications to replace TCP with >>> SMC protocol in place. And we use it to implement transparent >>> replacement. >>> >>> This replaces original TCP sockets with SMC, reuse TCP as clcsock when >>> calling setsockopt with TCP_ULP option, and without any overhead. >> >> This looks very interesting. Can you provide a simple userspace example about >> how to use ULP with smc? > > Here is a userspace C/S application: Thanks for the example, it was very helpful!