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 X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,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 B7FD2C433DF for ; Sat, 18 Jul 2020 13:06:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A09B120684 for ; Sat, 18 Jul 2020 13:06:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727768AbgGRNG4 (ORCPT ); Sat, 18 Jul 2020 09:06:56 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:55224 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726818AbgGRNGx (ORCPT ); Sat, 18 Jul 2020 09:06:53 -0400 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 06ID2N7P162630; Sat, 18 Jul 2020 09:06:51 -0400 Received: from ppma06ams.nl.ibm.com (66.31.33a9.ip4.static.sl-reverse.com [169.51.49.102]) by mx0a-001b2d01.pphosted.com with ESMTP id 32bw7xmftd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 18 Jul 2020 09:06:51 -0400 Received: from pps.filterd (ppma06ams.nl.ibm.com [127.0.0.1]) by ppma06ams.nl.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 06ID1x5U022386; Sat, 18 Jul 2020 13:06:49 GMT Received: from b06avi18626390.portsmouth.uk.ibm.com (b06avi18626390.portsmouth.uk.ibm.com [9.149.26.192]) by ppma06ams.nl.ibm.com with ESMTP id 32brbh0cp3-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 18 Jul 2020 13:06:49 +0000 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 06ID5Ntb64487832 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 18 Jul 2020 13:05:23 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3B7FDAE045; Sat, 18 Jul 2020 13:06:46 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E8DF3AE051; Sat, 18 Jul 2020 13:06:45 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Sat, 18 Jul 2020 13:06:45 +0000 (GMT) From: Karsten Graul To: davem@davemloft.net Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, heiko.carstens@de.ibm.com, raspl@linux.ibm.com, ubraun@linux.ibm.com Subject: [PATCH net v2 01/10] net/smc: handle unexpected response types for confirm link Date: Sat, 18 Jul 2020 15:06:09 +0200 Message-Id: <20200718130618.16724-2-kgraul@linux.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200718130618.16724-1-kgraul@linux.ibm.com> References: <20200718130618.16724-1-kgraul@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-07-18_05:2020-07-17,2020-07-18 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 spamscore=0 bulkscore=0 impostorscore=0 clxscore=1015 suspectscore=1 lowpriorityscore=0 priorityscore=1501 mlxlogscore=999 phishscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007180095 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org A delete link could arrive during confirm link processing. Handle this situation directly in smc_llc_srv_conf_link() rather than using the logic in smc_llc_wait() to avoid the unexpected message handling there. Reviewed-by: Ursula Braun Fixes: 1551c95b6124 ("net/smc: final part of add link processing as SMC server") Signed-off-by: Karsten Graul --- net/smc/smc_llc.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c index c1a038689c63..58f4da2e0cc7 100644 --- a/net/smc/smc_llc.c +++ b/net/smc/smc_llc.c @@ -1051,12 +1051,14 @@ static int smc_llc_srv_conf_link(struct smc_link *link, if (rc) return -ENOLINK; /* receive CONFIRM LINK response over the RoCE fabric */ - qentry = smc_llc_wait(lgr, link, SMC_LLC_WAIT_FIRST_TIME, - SMC_LLC_CONFIRM_LINK); - if (!qentry) { + qentry = smc_llc_wait(lgr, link, SMC_LLC_WAIT_FIRST_TIME, 0); + if (!qentry || + qentry->msg.raw.hdr.common.type != SMC_LLC_CONFIRM_LINK) { /* send DELETE LINK */ smc_llc_send_delete_link(link, link_new->link_id, SMC_LLC_REQ, false, SMC_LLC_DEL_LOST_PATH); + if (qentry) + smc_llc_flow_qentry_del(&lgr->llc_flow_lcl); return -ENOLINK; } smc_llc_save_peer_uid(qentry); -- 2.17.1