#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018 Facebook.  All Rights Reserved.
#
# FS QA Test 494
#
# Test truncation/hole punching of an active swapfile.
#
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.*
}

. ./common/rc
. ./common/filter

rm -f $seqres.full

_supported_fs generic
_require_scratch_swapfile
_require_xfs_io_command "fpunch"

echo "Format and mount"
_scratch_mkfs > $seqres.full 2>&1
_scratch_mount >> $seqres.full 2>&1

testdir="$SCRATCH_MNT/test-$seq"
mkdir "$testdir"

blocks=160
blksz=65536

echo "Initialize file"
_format_swapfile "$testdir/file1" $((blocks * blksz))
swapon "$testdir/file1"

echo "Try to truncate"
$XFS_IO_PROG -c "truncate $blksz" "$testdir/file1"

echo "Try to punch hole"
$XFS_IO_PROG -c "fpunch $blksz $((2 * blksz))" "$testdir/file1"

echo "Tear it down"
swapoff "$testdir/file1"

status=0
exit