Re: [PATCH v3 3/3] xfstests: dedupe with random io race test

[Eryu Guan <guaneryu@gmail.com>]

On Sun, Jun 24, 2018 at 02:00:29AM +0800, Zorro Lang wrote:
> Run several duperemove processes with fsstress on same directory at
> same time. Make sure the race won't break the fs or kernel.
> 
> Signed-off-by: Zorro Lang <zlang@redhat.com>
> ---
> 
> V3 did below changes:
> 1) Use $TEST_DIR/${seq}-running file to loop run duperemove.
> 2) Change kill_all_stress function
> 3) Change $TEST_DIR/${seq}md5.sum to ${tmp}.md5sum
> 
> Thanks,
> Zorro
> 
>  tests/shared/010     | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/shared/010.out |  2 ++
>  tests/shared/group   |  1 +
>  3 files changed, 97 insertions(+)
>  create mode 100755 tests/shared/010
>  create mode 100644 tests/shared/010.out
> 
> diff --git a/tests/shared/010 b/tests/shared/010
> new file mode 100755
> index 00000000..3cf50ddd
> --- /dev/null
> +++ b/tests/shared/010
> @@ -0,0 +1,94 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2018 Red Hat Inc.  All Rights Reserved.
> +#
> +# FS QA Test 010
> +#
> +# Dedup & random I/O race test, do multi-threads fsstress and dedupe on
> +# same directory/files
> +#
> +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 /
> +	rm -f $tmp.*
> +	end_test
> +}
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +. ./common/reflink
> +
> +# remove previous $seqres.full before test
> +rm -f $seqres.full
> +
> +# real QA test starts here
> +
> +# duperemove only supports btrfs and xfs (with reflink feature).
> +# Add other filesystems if it supports more later.
> +_supported_fs xfs btrfs
> +_supported_os Linux
> +_require_scratch_dedupe
> +_require_command "$DUPEREMOVE_PROG" duperemove
> +_require_command "$KILLALL_PROG" killall
> +
> +_scratch_mkfs > $seqres.full 2>&1
> +_scratch_mount >> $seqres.full 2>&1
> +
> +function end_test()
> +{
> +	local f=1
> +
> +	# stop duperemove running
> +	if [ -e $dupe_run ]; then
> +		rm -f $dupe_run
> +		wait $dedup_pids
> +	fi
> +
> +	# Make sure all fsstress get killed
> +	while [ $f -ne 0 ]; do
> +		$KILLALL_PROG -q $FSSTRESS_PROG > /dev/null 2>&1
> +		sleep 1
> +		f=`ps -eLf | grep $FSSTRESS_PROG | grep -v "grep" | wc -l`
> +	done
> +}
> +
> +sleep_time=$((50 * TIME_FACTOR))
> +
> +# Start fsstress
> +fsstress_opts="-r -n 1000 -p $((5 * LOAD_FACTOR))"
> +$FSSTRESS_PROG $fsstress_opts -d $SCRATCH_MNT -l 0 >> $seqres.full 2>&1 &
> +dedup_pids=""
> +dupe_run=$TEST_DIR/${seq}-running
> +# Start several dedupe processes on same directory
> +touch $dupe_run
> +for ((i = 0; i < $((2 * LOAD_FACTOR)); i++)); do
> +	while [ -e $dupe_run ]; do
> +		$DUPEREMOVE_PROG -dr --dedupe-options=same $SCRATCH_MNT/

This needs a "\" at the end of line, otherwise the output all go to
stdout then breaks golden image. I fixed it on commit.

Thanks,
Eryu

> +			>>$seqres.full 2>&1
> +	done &
> +	dedup_pids="$! $dedup_pids"
> +done
> +
> +# End the test after $sleep_time seconds
> +sleep $sleep_time
> +end_test
> +
> +# umount and mount again, verify pagecache contents don't mutate and a fresh
> +# read from the disk also doesn't show mutations.
> +find $testdir -type f -exec md5sum {} \; > ${tmp}.md5sum
> +_scratch_cycle_mount
> +md5sum -c --quiet ${tmp}.md5sum
> +
> +echo "Silence is golden"
> +status=0
> +exit
> diff --git a/tests/shared/010.out b/tests/shared/010.out
> new file mode 100644
> index 00000000..1d83a8d6
> --- /dev/null
> +++ b/tests/shared/010.out
> @@ -0,0 +1,2 @@
> +QA output created by 010
> +Silence is golden
> diff --git a/tests/shared/group b/tests/shared/group
> index 9c484794..094da27d 100644
> --- a/tests/shared/group
> +++ b/tests/shared/group
> @@ -12,6 +12,7 @@
>  007 dangerous_fuzzers
>  008 auto stress dedupe
>  009 auto stress dedupe
> +010 auto stress dedupe
>  032 mkfs auto quick
>  272 auto enospc rw
>  289 auto quick
> -- 
> 2.14.4
> 
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