#! /bin/bash
# FSQA Test No. 044
#
# Test for NULL files problem
#
#-----------------------------------------------------------------------
# Copyright (c) 2006 Silicon Graphics, Inc.  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 "exit \$status" 0 1 2 3 15

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

# real QA test starts here
_supported_fs generic
_supported_os Linux

_require_scratch
_require_scratch_shutdown
_require_xfs_io_command "fiemap"
_scratch_mkfs >/dev/null 2>&1
_require_metadata_journaling $SCRATCH_DEV
_scratch_mount

# create files
i=1;
while [ $i -lt 1000 ]
do
	file=$SCRATCH_MNT/$i
	$XFS_IO_PROG -f -c "pwrite -b 64k -S 0xff 0 64k" $file > /dev/null
	if [ $? -ne 0 ]
	then
		echo error creating/writing file $file
		exit
	fi
	$XFS_IO_PROG -c "truncate 64k" $file > /dev/null
	if [ $? -ne 0 ]
	then
		echo error truncating file $file
		exit
	fi
	let i=$i+1
done

# give the system a chance to write something out
sleep 10

_scratch_shutdown

_scratch_unmount
_scratch_mount
_scratch_unmount
if [ ! _check_scratch_fs ]
then
	echo error detected in filesystem
	exit
fi
_scratch_mount

# check file size and contents
i=1;
while [ $i -lt 1000 ]
do
	file=$SCRATCH_MNT/$i
	# if file does not exist, the create was not logged, skip it
	if [ -e $file ]
	then
		# if file size is zero it cannot be corrupt, skip it
		if [ -s $file ]
		then
			# if file has non-zero size but no extents then it's contents will be NULLs, bad.
			num_extents=`_count_extents $file`
			num_holes=`_count_holes $file`
			if [ $num_extents -eq 0 ]; then
				echo corrupt file $file - non-zero size but no extents
			elif [ $num_holes -ne 0 ]; then
				echo corrupt file $file - contains holes
			else
				rm -f $file
			fi
		else
			rm -f $file
		fi
	fi
	let i=$i+1
done

status=0
exit