From patchwork Wed Dec 6 00:37:44 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ross Zwisler X-Patchwork-Id: 10094213 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 38882602BF for ; Wed, 6 Dec 2017 00:37:56 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 29247299C3 for ; Wed, 6 Dec 2017 00:37:56 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1DD7C29A86; Wed, 6 Dec 2017 00:37:56 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 85984299C3 for ; Wed, 6 Dec 2017 00:37:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753253AbdLFAhy (ORCPT ); Tue, 5 Dec 2017 19:37:54 -0500 Received: from mga11.intel.com ([192.55.52.93]:6496 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753125AbdLFAhx (ORCPT ); Tue, 5 Dec 2017 19:37:53 -0500 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Dec 2017 16:37:53 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,365,1508828400"; d="scan'208";a="10894850" Received: from theros.lm.intel.com ([10.232.112.77]) by fmsmga001.fm.intel.com with ESMTP; 05 Dec 2017 16:37:52 -0800 From: Ross Zwisler To: fstests , Eryu Guan Cc: Ross Zwisler , linux-xfs , linux-nvdimm , Jan Kara , Dave Chinner , Dan Williams , Amir Goldstein Subject: [fstests PATCH v5 2/2] generic: add test for DAX MAP_SYNC support Date: Tue, 5 Dec 2017 17:37:44 -0700 Message-Id: <20171206003744.28587-3-ross.zwisler@linux.intel.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20171206003744.28587-1-ross.zwisler@linux.intel.com> References: <20171206003744.28587-1-ross.zwisler@linux.intel.com> Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This test creates a file and writes to it via an mmap(), but never syncs via fsync/msync. This process is tracked via dm-log-writes, then replayed. If MAP_SYNC is working the dm-log-writes replay will show the test file with 1 MiB of on-media block allocations. This is because each allocating page fault included an implicit metadata sync. If MAP_SYNC isn't working (which you can test by removing the "-S" flag to xfs_io mmap) the file will be smaller or missing entirely. Note that dm-log-writes doesn't track the data that we write via the mmap(), so we can't do any data integrity checking. We can only verify that the metadata writes for the page faults happened. Signed-off-by: Ross Zwisler --- common/dmlogwrites | 20 +++++++++++++ tests/generic/999 | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++ tests/generic/999.out | 3 ++ tests/generic/group | 1 + 4 files changed, 106 insertions(+) create mode 100755 tests/generic/999 create mode 100644 tests/generic/999.out diff --git a/common/dmlogwrites b/common/dmlogwrites index 05829dbc..2b697bec 100644 --- a/common/dmlogwrites +++ b/common/dmlogwrites @@ -28,6 +28,26 @@ _require_log_writes() _require_test_program "log-writes/replay-log" } +_require_log_writes_dax() +{ + [ -z "$LOGWRITES_DEV" -o ! -b "$LOGWRITES_DEV" ] && \ + _notrun "This test requires a valid \$LOGWRITES_DEV" + + _require_dm_target log-writes + _require_test_program "log-writes/replay-log" + + _scratch_unmount + _log_writes_init + _log_writes_mkfs > /dev/null 2>&1 + _log_writes_mount -o dax + # Check options to be sure. XFS ignores dax option + # and goes on if dev underneath does not support dax. + _fs_options $LOGWRITES_DMDEV | grep -qw "dax" || \ + _notrun "$LOGWRITES_DMDEV $FSTYP does not support -o dax" + _log_writes_unmount + _log_writes_remove +} + _log_writes_init() { local BLK_DEV_SIZE=`blockdev --getsz $SCRATCH_DEV` diff --git a/tests/generic/999 b/tests/generic/999 new file mode 100755 index 00000000..ca5772da --- /dev/null +++ b/tests/generic/999 @@ -0,0 +1,82 @@ +#! /bin/bash +# FS QA Test No. 999 +# +# Use dm-log-writes to verify that MAP_SYNC actually syncs metadata during +# page faults. +# +#----------------------------------------------------------------------- +# Copyright (c) 2017 Intel Corporation. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- +# + +seq=`basename $0` +seqres=$RESULT_DIR/$seq +echo "QA output created by $seq" + +here=`pwd` +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + _log_writes_cleanup +} + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter +. ./common/dmlogwrites + +# remove previous $seqres.full before test +rm -f $seqres.full + +# real QA test starts here +_supported_fs generic +_supported_os Linux +_require_log_writes_dax +_require_xfs_io_command "log_writes" + +_log_writes_init +_log_writes_mkfs >> $seqres.full 2>&1 +_log_writes_mount -o dax + +LEN=$((1024 * 1024)) # 1 MiB + +xfs_io -t -c "truncate $LEN" -c "mmap -S 0 $LEN" -c "mwrite 0 $LEN" \ + -c "log_writes -d $LOGWRITES_NAME -m preunmap" \ + -f $SCRATCH_MNT/test + +# Unmount the scratch dir and tear down the log writes target +_log_writes_unmount +_log_writes_remove +_check_scratch_fs + +# destroy previous filesystem so we can be sure our rebuild works +_scratch_mkfs >> $seqres.full 2>&1 + +# check pre-unmap state +_log_writes_replay_log preunmap +_scratch_mount + +# We should see $SCRATCH_MNT/test as having 1 MiB in block allocations +du -sh $SCRATCH_MNT/test | _filter_scratch | _filter_spaces + +_scratch_unmount +_check_scratch_fs + +echo "Silence is golden" +status=0 +exit diff --git a/tests/generic/999.out b/tests/generic/999.out new file mode 100644 index 00000000..c7b8f8a2 --- /dev/null +++ b/tests/generic/999.out @@ -0,0 +1,3 @@ +QA output created by 999 +1.0M SCRATCH_MNT/test +Silence is golden diff --git a/tests/generic/group b/tests/generic/group index 6c3bb03a..ae88aa03 100644 --- a/tests/generic/group +++ b/tests/generic/group @@ -472,3 +472,4 @@ 467 auto quick exportfs 468 shutdown auto quick metadata 469 auto quick +999 auto quick dax