tests/generic/494

#! /bin/bash
# FS QA Test 494
#
# Test truncation/hole punching of an active swapfile.
#
#-----------------------------------------------------------------------
# Copyright (c) 2018 Facebook.  All Rights Reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#-----------------------------------------------------------------------
#

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
_supported_os Linux
_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