#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2000-2004 Silicon Graphics, Inc.  All Rights Reserved.
#
# FS QA Test No. 104
#
# XFS online growfs-while-allocating tests (data subvol variant)
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1	# failure is the default!
trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15

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

_create_scratch()
{
	echo "*** mkfs"
	_scratch_mkfs_xfs $@ | tee -a $seqres.full | _filter_mkfs 2>$tmp.mkfs
	. $tmp.mkfs

	echo "*** mount"
	if ! _try_scratch_mount 2>/dev/null
	then
		echo "failed to mount $SCRATCH_DEV"
		exit 1
	fi

	# fix the reserve block pool to a known size so that the enospc
	# calculations work out correctly.
	_scratch_resvblks 1024 >  /dev/null 2>&1
}

_fill_scratch()
{
	$XFS_IO_PROG -f -c "resvsp 0 ${1}" $SCRATCH_MNT/resvfile
}

_stress_scratch()
{
	procs=3
	nops=1000
	# -w ensures that the only ops are ones which cause write I/O
	FSSTRESS_ARGS=`_scale_fsstress_args -d $SCRATCH_MNT -w -p $procs \
	    -n $nops $FSSTRESS_AVOID`
	$FSSTRESS_PROG $FSSTRESS_ARGS >> $seqres.full 2>&1 &
}

# real QA test starts here
_supported_fs xfs
_require_scratch
_require_xfs_io_command "falloc"

rm -f $seqres.full
_scratch_mkfs_xfs | tee -a $seqres.full | _filter_mkfs 2>$tmp.mkfs
. $tmp.mkfs	# extract blocksize and data size for scratch device

endsize=`expr 550 \* 1048576`	# stop after growing this big
incsize=`expr  42 \* 1048576`	# grow in chunks of this size
modsize=`expr   4 \* $incsize`	# pause after this many increments

[ `expr $endsize / $dbsize` -lt $dblocks ] || _notrun "Scratch device too small"

nags=4
size=`expr 125 \* 1048576`	# 120 megabytes initially
sizeb=`expr $size / $dbsize`	# in data blocks
echo "*** creating scratch filesystem"
logblks=$(_scratch_find_xfs_min_logblocks -dsize=${size} -dagcount=${nags})
_create_scratch -lsize=${logblks}b -dsize=${size} -dagcount=${nags}

echo "*** using some initial space on scratch filesystem"
for i in `seq 125 -1 90`; do
	fillsize=`expr $i \* 1048576`
	out="$(_fill_scratch $fillsize 2>&1)"
	echo "$out" | grep -q 'No space left on device' && continue
	test -n "${out}" && echo "$out"
	break
done

#
# Grow the filesystem while actively stressing it...
# Kick off more stress threads on each iteration, grow; repeat.
#
while [ $size -le $endsize ]; do
	echo "*** stressing filesystem"
	echo "*** stressing a ${sizeb} block filesystem" >> $seqres.full
	_stress_scratch
	sleep 1
	size=`expr $size + $incsize`
	sizeb=`expr $size / $dbsize`	# in data blocks
	echo "*** growing filesystem"
	echo "*** growing to a ${sizeb} block filesystem" >> $seqres.full
	xfs_growfs -D ${sizeb} $SCRATCH_MNT \
		| tee -a $seqres.full | _filter_mkfs 2>$tmp.growfs
	. $tmp.growfs
	[ `expr $size % $modsize` -eq 0 ] && wait	# every 4th iteration
	echo AGCOUNT=$agcount | tee -a $seqres.full
	echo && echo >> $seqres.full
done
wait	# stop for any remaining stress processes

_scratch_unmount

status=0
exit