From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cn.fujitsu.com ([222.73.24.84]:59608 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754636AbcINBzk (ORCPT ); Tue, 13 Sep 2016 21:55:40 -0400 From: Qu Wenruo Subject: [PATCH v6 6/6] fstests: btrfs: Test inband dedupe with data balance. Date: Wed, 14 Sep 2016 09:55:27 +0800 Message-Id: <20160914015527.10274-7-quwenruo@cn.fujitsu.com> In-Reply-To: <20160914015527.10274-1-quwenruo@cn.fujitsu.com> References: <20160914015527.10274-1-quwenruo@cn.fujitsu.com> MIME-Version: 1.0 Sender: fstests-owner@vger.kernel.org To: linux-btrfs@vger.kernel.org, fstests@vger.kernel.org Cc: fdmanana@gmail.com, mfasheh@suse.de List-ID: Btrfs balance will reloate date extent, but its hash is removed too late at run_delayed_ref() time, which will cause extent ref increased during balance, cause either find_data_references() gives WARN_ON() or even run_delayed_refs() fails and cause transaction abort. Add such concurrency test for inband dedupe and data balance. Signed-off-by: Qu Wenruo --- tests/btrfs/203 | 110 ++++++++++++++++++++++++++++++++++++++++++++++++++++ tests/btrfs/203.out | 3 ++ tests/btrfs/group | 1 + 3 files changed, 114 insertions(+) create mode 100755 tests/btrfs/203 create mode 100644 tests/btrfs/203.out diff --git a/tests/btrfs/203 b/tests/btrfs/203 new file mode 100755 index 0000000..96af734 --- /dev/null +++ b/tests/btrfs/203 @@ -0,0 +1,110 @@ +#! /bin/bash +# FS QA Test 203 +# +# Btrfs inband dedupe with balance concurrency test +# +# This can spot inband dedupe error which will increase delayed ref on +# an data extent inside RO block group +# +#----------------------------------------------------------------------- +# Copyright (c) 2016 Fujitsu. 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` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + kill $populate_pid &> /dev/null + kill $balance_pid &> /dev/null + wait + # Check later comment for reason + $BTRFS_UTIL_PROG balance cancel $SCRATCH_MNT &> /dev/null + rm -f $tmp.* +} + +# get standard environment, filters and checks +. ./common/rc +. ./common/filter +. ./common/reflink + +# remove previous $seqres.full before test +rm -f $seqres.full + +# real QA test starts here + +_supported_fs btrfs +_supported_os Linux +_require_scratch +_require_cp_reflink +_require_btrfs_subcommand dedupe +_require_btrfs_fs_feature dedupe + +dedupe_bs=128k +file_size_in_kilo=4096 +init_file=$SCRATCH_MNT/foo +run_time=$((60 * $TIME_FACTOR)) + +_scratch_mkfs >> $seqres.full 2>&1 +_scratch_mount + +do_dedupe_balance_test() +{ + _run_btrfs_util_prog dedupe enable -f -b $dedupe_bs -s inmemory \ + $SCRATCH_MNT + + # create the initial file and fill hash pool + $XFS_IO_PROG -f -c "pwrite -S 0x0 -b $dedupe_bs 0 $dedupe_bs" -c "fsync" \ + $init_file | _filter_xfs_io + + _btrfs_stress_balance $SCRATCH_MNT >/dev/null 2>&1 & + balance_pid=$! + + # Populate fs with all 0 data, to trigger enough in-band dedupe work + # to race with balance + _populate_fs -n 5 -f 10000000 -d 1 -r $SCRATCH_MNT \ + -s $file_size_in_kilo &> /dev/null & + populate_pid=$! + + sleep $run_time + + kill $populate_pid + kill $balance_pid + wait + + # Sometimes even we killed $balance_pid and wait returned, + # balance may still be running, use balance cancel to wait it. + # As this is just a workaround, we don't want it pollute seqres + # so call $BTRFS_UTIL_PROG directly + $BTRFS_UTIL_PROG balance cancel $SCRATCH_MNT &> /dev/null + + rm $SCRATCH_MNT/* -rf &> /dev/null + _run_btrfs_util_prog dedupe disable $SCRATCH_MNT +} + +do_dedupe_balance_test + +# success, all done +status=0 +exit diff --git a/tests/btrfs/203.out b/tests/btrfs/203.out new file mode 100644 index 0000000..404394c --- /dev/null +++ b/tests/btrfs/203.out @@ -0,0 +1,3 @@ +QA output created by 203 +wrote 131072/131072 bytes at offset 0 +XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec) diff --git a/tests/btrfs/group b/tests/btrfs/group index 2e539d0..c35b919 100644 --- a/tests/btrfs/group +++ b/tests/btrfs/group @@ -135,3 +135,4 @@ 130 auto clone send 200 auto ib-dedupe 201 auto ib-dedupe +203 auto ib-dedupe balance -- 2.7.4