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=-15.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 CC478C433E0 for ; Wed, 10 Feb 2021 18:59:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 83EF164E35 for ; Wed, 10 Feb 2021 18:59:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234038AbhBJS7R (ORCPT ); Wed, 10 Feb 2021 13:59:17 -0500 Received: from sandeen.net ([63.231.237.45]:40946 "EHLO sandeen.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234202AbhBJS5J (ORCPT ); Wed, 10 Feb 2021 13:57:09 -0500 Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.146]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by sandeen.net (Postfix) with ESMTPSA id 908B917264; Wed, 10 Feb 2021 12:56:28 -0600 (CST) To: Brian Foster , fstests@vger.kernel.org Cc: linux-xfs@vger.kernel.org References: <20210210170628.173200-1-bfoster@redhat.com> From: Eric Sandeen Subject: Re: [PATCH] generic: test mapped write after shutdown and failed writeback Message-ID: Date: Wed, 10 Feb 2021 12:56:28 -0600 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: <20210210170628.173200-1-bfoster@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: fstests@vger.kernel.org On 2/10/21 11:06 AM, Brian Foster wrote: > XFS has a regression where it failed to check shutdown status in the > write fault path. This produced an iomap warning if the page > happened to recently fail a writeback attempt because writeback > failure can clear Uptodate status on the page. Add a test for this > scenario to help ensure mapped write failures are handled as > expected in the event of filesystem shutdown. > > Signed-off-by: Brian Foster This looks reasonable to me, I have run the same xfs_io tests when looking at this behavior and they do provoke it. This could maybe run on $TEST? But I don't really care much either way. I spot-checked this on ext4 and it passes. Reviewed-by: Eric Sandeen > --- > > Note that this test currently fails on XFS. The fix is posted for review > on linux-xfs: > > https://lore.kernel.org/linux-xfs/20210210170112.172734-1-bfoster@redhat.com/ > > Brian > > tests/generic/999 | 45 +++++++++++++++++++++++++++++++++++++++++++ > tests/generic/999.out | 4 ++++ > tests/generic/group | 1 + > 3 files changed, 50 insertions(+) > create mode 100755 tests/generic/999 > create mode 100644 tests/generic/999.out > > diff --git a/tests/generic/999 b/tests/generic/999 > new file mode 100755 > index 00000000..5e5408e7 > --- /dev/null > +++ b/tests/generic/999 > @@ -0,0 +1,45 @@ > +#! /bin/bash > +# SPDX-License-Identifier: GPL-2.0-only > +# Copyright 2021 Red Hat, Inc. > +# > +# FS QA Test No. 999 > +# > +# Test a write fault scenario on a shutdown fs. > +# > +seq=`basename $0` > +seqres=$RESULT_DIR/$seq > +echo "QA output created by $seq" > + > +here=`pwd` > +tmp=/tmp/$$ > +status=1 # failure is the default! > +trap "_cleanup; exit \$status" 0 1 2 3 15 > + > +_cleanup() > +{ > + rm -f $tmp.* > +} > + > +. ./common/rc > +. ./common/filter > + > +rm -f $seqres.full > + > +_supported_fs generic > +_require_scratch_nocheck > +_require_scratch_shutdown > + > +_scratch_mkfs &>> $seqres.full > +_scratch_mount > + > +# XFS had a regression where it failed to check shutdown status in the fault > +# path. This produced an iomap warning because writeback failure clears Uptodate > +# status on the page. > +file=$SCRATCH_MNT/file > +$XFS_IO_PROG -fc "pwrite 0 4k" -c fsync $file | _filter_xfs_io > +$XFS_IO_PROG -x -c "mmap 0 4k" -c "mwrite 0 4k" -c shutdown -c fsync \ > + -c "mwrite 0 4k" $file | _filter_xfs_io > + > +# success, all done > +status=0 > +exit > diff --git a/tests/generic/999.out b/tests/generic/999.out > new file mode 100644 > index 00000000..f55569ff > --- /dev/null > +++ b/tests/generic/999.out > @@ -0,0 +1,4 @@ > +QA output created by 999 > +wrote 4096/4096 bytes at offset 0 > +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) > +fsync: Input/output error > diff --git a/tests/generic/group b/tests/generic/group > index b10fdea4..edd54ce5 100644 > --- a/tests/generic/group > +++ b/tests/generic/group > @@ -625,3 +625,4 @@ > 620 auto mount quick > 621 auto quick encrypt > 622 auto shutdown metadata atime > +999 auto quick shutdown >