#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Fujitsu.  All Rights Reserved.
#
# FS QA Test No. 042
#
# Test the basic functionality of Quota groups
#
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.*
}

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

_supported_fs btrfs
_require_scratch
_require_btrfs_qgroup_report

rm -f $seqres.full

run_check _scratch_mkfs
_scratch_mount

LIMIT_SIZE=$((10 * 1024 * 1024))

_run_btrfs_util_prog quota enable $SCRATCH_MNT
_run_btrfs_util_prog qgroup create 1/1 $SCRATCH_MNT
_run_btrfs_util_prog qgroup limit $LIMIT_SIZE 1/1 $SCRATCH_MNT

for i in `seq 10 -1 1`; do
	#add newly created subvolume qgroup to it's parent qgroup
	_run_btrfs_util_prog subvolume create -i 1/1 \
		$SCRATCH_MNT/subv_$i
done

#try to write data into every subvolume
for i in `seq 10 -1 1`; do
	$XFS_IO_PROG -f -d -c 'pwrite -b 4k 0 10m' $SCRATCH_MNT/subv_$i/data \
		>> /dev/null 2>&1 &
done

wait
_run_btrfs_util_prog filesystem sync $SCRATCH_MNT \
	>>$seqres.full 2>&1

total_written=0
#calculate every subvolume's data.
for i in `seq 10 -1 1`; do
	#we may fail to create the file, skip this subvolume
	test -f $SCRATCH_MNT/subv_$i || continue

	filesize=`du -b $SCRATCH_MNT/subv_$i/data | $AWK_PROG '{print $1}'`
	if [ $filesize -gt $LIMIT_SIZE ];then
		_fail "subv_$i/data size should be less than $LIMIT_SIZE"
	fi
	total_written=$(($total_written+$filesize))
done

#check if total written exceeds limit
if [ $total_written -gt $LIMIT_SIZE ];then
	_fail "total written should be less than $LIMIT_SIZE"
fi

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