#! /bin/bash
# FS QA Test No. 226
#
# Test for prealloc space leaks by rewriting the same file in a loop
#
#-----------------------------------------------------------------------
# Copyright (c) 2009 Eric Sandeen.  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 "rm -f $tmp.*; exit \$status" 0 1 2 3 15

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

_supported_fs generic
_supported_os Linux IRIX
_require_scratch

# real QA test starts here
rm -f $seqres.full

umount $SCRATCH_DEV 2>/dev/null
echo "--> mkfs 256m filesystem"
_scratch_mkfs_sized `expr 256 \* 1024 \* 1024` >> $seqres.full 2>&1
_scratch_mount

loops=16

# Buffer size argument supplied to xfs_io "pwrite" command
buffer="-b $(expr 512 \* 1024)"

echo "--> $loops buffered 64m writes in a loop"
for I in `seq 1 $loops`; do
	echo -n "$I "
	$XFS_IO_PROG -f \
		-c "pwrite ${buffer} 0 64m" $SCRATCH_MNT/test >> $seqres.full
	rm -f $SCRATCH_MNT/test
done

echo
umount $SCRATCH_DEV
_scratch_mount

echo "--> $loops direct 64m writes in a loop"
for I in `seq 1 $loops`; do
	echo -n "$I "
	$XFS_IO_PROG -f -d \
		-c "pwrite ${buffer} 0 64m" $SCRATCH_MNT/test >> $seqres.full
	rm -f $SCRATCH_MNT/test 
done

echo
umount $SCRATCH_DEV

status=0
exit