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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016 Fujitsu. All Rights Reserved.
#
# FS QA Test 028
#
# Test if qgroup can handle extent de-reference during reallocation.
# "extent de-reference" means that reducing an extent's reference count
# or freeing an extent.
# Although current qgroup can handle it, we still need to prevent any
# regression which may break current qgroup.
#
. ./common/preamble
_begin_fstest auto qgroup balance
# Import common functions.
. ./common/filter
# real QA test starts here
_supported_fs btrfs
_require_scratch
_require_btrfs_qgroup_report
_scratch_mkfs >/dev/null
_scratch_mount
_run_btrfs_util_prog quota enable $SCRATCH_MNT
_qgroup_rescan $SCRATCH_MNT
# Increase the probability of generating de-refer extent, and decrease
# other.
args=`_scale_fsstress_args -z \
-f write=10 -f unlink=10 \
-f creat=10 -f fsync=10 \
-f fsync=10 -n 100000 -p 2 \
-d $SCRATCH_MNT/stress_dir`
echo "Run fsstress $args" >>$seqres.full
$FSSTRESS_PROG $args >>$seqres.full &
fsstress_pid=$!
echo "Start balance" >>$seqres.full
_btrfs_stress_balance -d $SCRATCH_MNT >/dev/null 2>&1 &
balance_pid=$!
# 30s is enough to trigger bug
sleep $((30*$TIME_FACTOR))
kill $fsstress_pid &> /dev/null
wait $fsstress_pid &> /dev/null
_btrfs_kill_stress_balance_pid $balance_pid
_run_btrfs_util_prog filesystem sync $SCRATCH_MNT
_scratch_unmount
# qgroup will be checked at _check_scratch_fs() by fstest.
echo "Silence is golden"
status=0
exit
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