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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 54364C432C2 for ; Wed, 25 Sep 2019 17:06:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 27DE7214DA for ; Wed, 25 Sep 2019 17:06:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="TSMXzQdh" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2438084AbfIYRGf (ORCPT ); Wed, 25 Sep 2019 13:06:35 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:53938 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407542AbfIYRGf (ORCPT ); Wed, 25 Sep 2019 13:06:35 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x8PH3mLj178311; Wed, 25 Sep 2019 17:06:32 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=content-type : mime-version : subject : from : in-reply-to : date : cc : content-transfer-encoding : message-id : references : to; s=corp-2019-08-05; bh=F/FH4mx2GzL22ovhA+V8o5cZJzNJagu/2LubY0dWemk=; b=TSMXzQdhnxJ6ll/UVo9MtV/1jCQeot3WryZI0PtZ1Dds7R0YEuDfkAnD7VmgXgFIxmcj zQfgRI3hbvuDaF60YdpXrdIbKUOG6hog/F4zpPiS7BCbNqfL82lQJmc3d6m1p8mMpUef ipA2GSPu1XpYPRYYsdQvVllqu7MqKO3aWPmN9rd4p1Dfv21zoc47i3Pq9k7/BFaXYXQV BVSog4N4nu1par4V+PM0r+Aa8GY1Z6vXgDYnoxsUZ4vPohNi81nw3Hjp+r1FZvKL/ec5 IeFQ/yxkwrf3T+4wzoOZ9w5bdYVBvW9CX7yay25Y8N/tVbi0QS7n1PvYz0UtDuXI8Duu Bg== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by aserp2120.oracle.com with ESMTP id 2v5btq66dk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 25 Sep 2019 17:06:32 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x8PGmciW067984; Wed, 25 Sep 2019 17:06:31 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by aserp3020.oracle.com with ESMTP id 2v7vnydvpm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 25 Sep 2019 17:06:31 +0000 Received: from abhmp0010.oracle.com (abhmp0010.oracle.com [141.146.116.16]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x8PH6R1A026124; Wed, 25 Sep 2019 17:06:30 GMT Received: from [172.20.2.92] (/12.203.202.9) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 25 Sep 2019 10:06:27 -0700 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Subject: Re: NFSv4 client locks up on larger writes with Kerberos enabled From: Chuck Lever In-Reply-To: <20190925164831.GA9366@fieldses.org> Date: Wed, 25 Sep 2019 10:06:26 -0700 Cc: Kevin Vasko , Linux NFS Mailing List Content-Transfer-Encoding: 7bit Message-Id: <57192382-86BE-4878-9AE0-B22833D56367@oracle.com> References: <20190925164831.GA9366@fieldses.org> To: Bruce Fields X-Mailer: Apple Mail (2.3445.104.11) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9390 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=900 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909250152 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9390 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=975 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1909250153 Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org > On Sep 25, 2019, at 9:48 AM, bfields@fieldses.org wrote: > > On Wed, Sep 18, 2019 at 06:36:13PM -0500, Kevin Vasko wrote: >> We have a new Dell EMC Unity 300 acting as NAS Server that is >> presenting a NFSv4 NFS Share. Our clients are mostly Ubuntu 18.04.3 >> but issue is also present on CentOS 7.6 systems. We have been >> struggling with this issue for over a week now and not sure how to >> resolve it. >> >> >> >> We are having trouble with NFS Clients completing their writes to the >> Dell EMC Unity 300 NFS Server when Kerberos is enabled on the NFS >> Share. I created the NFS Share on the U300, associated it with our >> FreeIPA (Kerberos/LDAP server) and everything shows successful. > > Troubleshooting ideas off the top of my head: > > It might be worth trying some other client versions if it's not hard. > > It'd be interesting to know what's happening on the network.... > Unfortunately big krb5p writes won't be fun to try to capture and > examine. Wireshark is supposed to have a mechanism for giving it the keys so that captured GSS data can be decrypted. I've never gotten it to work, but I didn't try hard. Should be appropriately documented. > Maybe some network or rpc-level statistics would help show if > there are an unusual number of retries or failures. -- Chuck Lever