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More tests for the NULL files problem
Merge of master-melb:xfs-cmds:27632a by kenmcd.

  Null files test case - async write followed by a truncate up

#! /bin/sh
# FSQA Test No. 140
#
# Test for NULL files problem
#
#-----------------------------------------------------------------------
#  Copyright (c) 2006 Silicon Graphics, Inc.  All Rights Reserved.
#-----------------------------------------------------------------------
#
# creator
owner=lachlan@sgi.com

seq=`basename $0`
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()
{
    _cleanup_testdir
}

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

# real QA test starts here
_supported_fs xfs
_supported_os Linux IRIX

_setup_testdir
_require_scratch
_scratch_mkfs_xfs >/dev/null 2>&1
_scratch_mount

# create files
i=1;
while [ $i -lt 1000 ]
do
	file=$SCRATCH_MNT/$i
	xfs_io -f -c "pwrite -b 32k -S 0xff 0 32k" $file > /dev/null
	xfs_io -f -c "truncate 64k" $file > /dev/null
	i=`expr $i + 1`
done

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

src/godown $SCRATCH_MNT

umount $SCRATCH_MNT
_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.
			if xfs_bmap $file | grep 'no extents' > /dev/null
			then
				echo corrupt file $file - non-zero size but no extents
			fi
		fi
		rm -f $file
	fi
	i=`expr $i + 1`
done

status=0
exit