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fix filter for stripe aligned filesystems

Flags has extra bits set in it xfs_bmap output when
the filesyste is using stripe alignment. Fix the test
to only look at the unwritten flag. Capture the xfs_bmap
output as well so failures can be debugged easily.
Merge of master-melb:xfs-cmds:30994a by kenmcd.

  fix filter for stripe aligned filesystems.

#! /bin/sh
# FSQA Test No. 166
#
# ->page-mkwrite test - unwritten extents and mmap
#
#-----------------------------------------------------------------------
#  Copyright (c) 2007 Silicon Graphics, Inc.  All Rights Reserved.
#-----------------------------------------------------------------------
#
# creator
owner=dgc@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
rm -f $seq.full

_cleanup()
{
    _cleanup_testdir
}

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

# assumes 1st, 3rd and 5th blocks are single written blocks,
# the others are unwritten.
_filter_blocks()
{
	$AWK_PROG '
/[0-9]/ {
	if (!written_size) {
		written_size = $6
		unwritten1 = ((1048576/512) / 2) - written_size
		unwritten2 = ((1048576/512) / 2) - 2 * written_size
	}

	/* is the extent unwritten? */
	unwritten_ext = 0;
	if ($7 >= 10000)
		unwritten_ext = 1;

	size = "RIGHT"
	flags = "GOOD"
	if (unwritten_ext) {
		if (unwritten1) {
			if ($6 != unwritten1)
				size = "WRONG"
			unwritten1 = 0;
		} else if ($6 != unwritten2) {
			size = "WRONG"
		}
	} else {
		if ($6 != written_size)
			size = "WRONG"
	}
	print $1, "[AA..BB]", "XX..YY", "AG", "(AA..BB)", size, flags
}'
}

# real QA test starts here
_supported_fs xfs
_supported_os Linux

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

TEST_FILE=$SCRATCH_MNT/test_file
TEST_PROG=$here/src/unwritten_mmap
FILE_SIZE=1048576

rm -f $TEST_FILE
$TEST_PROG $FILE_SIZE $TEST_FILE

xfs_bmap -vp $TEST_FILE >> $seq.full
xfs_bmap -vp $TEST_FILE | _filter_blocks

status=0
exit