#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2020 SUSE Linux Products GmbH. All Rights Reserved.
#
# FS QA Test 212
#
# Test if unmounting a fs with balance canceled can lead to crash.
# This needs CONFIG_BTRFS_DEBUG compiled, which adds extra unmount time self-test
#
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.*
	kill $balance_pid &> /dev/null
	kill $cancel_pid &> /dev/null
	"$KILLALL_PROG" -q $FSSTRESS_PROG &> /dev/null
	$BTRFS_UTIL_PROG balance cancel $SCRATCH_MNT &> /dev/null
	wait
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here

# Modify as appropriate.
_supported_fs btrfs
_require_scratch
_require_command "$KILLALL_PROG" killall

_scratch_mkfs >> $seqres.full
_scratch_mount

runtime=15

balance_workload()
{
	trap "wait; exit" SIGTERM
	while true; do
		_run_btrfs_balance_start &> /dev/null
	done
}

cancel_workload()
{
	trap "wait; exit" SIGTERM
	while true; do
		$BTRFS_UTIL_PROG balance cancel $SCRATCH_MNT &> /dev/null
		sleep 2
	done
}

$FSSTRESS_PROG -d $SCRATCH_MNT -w -n 100000  >> $seqres.full 2>/dev/null &
balance_workload &
balance_pid=$!

cancel_workload &
cancel_pid=$!

sleep $runtime

kill $balance_pid
kill $cancel_pid
"$KILLALL_PROG" -q $FSSTRESS_PROG &> /dev/null
$BTRFS_UTIL_PROG balance cancel $SCRATCH_MNT &> /dev/null
wait

echo "Silence is golden"
# success, all done
status=0
exit