FSCK_OPT=-fn
OUT=$test_name.log
EXP=$test_dir/expect
CONF=$TMPFILE.conf

if [ $(uname -s) = "Darwin" ]; then
	# creates a 4TB filesystem
	echo "$test_name: $DESCRIPTION: skipped for HFS+ (no sparse files)"
	return 0
fi

if [ $(uname -s) = "FreeBSD" ]; then
	# creates a 4TB filesystem
	echo "$test_name: $DESCRIPTION: skipped for FreeBSD (no sparse files)"
	return 0
fi

cat > $CONF << ENDL
[fs_types]
	hugefile = {
		features = extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize,^resize_inode,sparse_super2
		hash_alg = half_md4
		num_backup_sb = 0
		packed_meta_blocks = 1
		make_hugefiles = 1
		inode_ratio = 4194304
		hugefiles_dir = /store
		hugefiles_name = big-data
		hugefiles_digits = 0
		hugefiles_size = 0
		hugefiles_align = 256M
		num_hugefiles = 1
		zero_hugefiles = false
		flex_bg_size = 262144
	}
ENDL

echo "mke2fs -F -T hugefile test.img 4T" > $OUT
MKE2FS_CONFIG=$CONF $MKE2FS -F -T hugefile $TMPFILE 4T >> $OUT 2>&1
rm -f $CONF

# check the file system if we get this far, we succeeded...
$FSCK $FSCK_OPT -N test_filesys $TMPFILE >> $OUT 2>&1
status=$?
echo Exit status is $status >> $OUT

echo 'debugfs -R "extents /store/big-data" test.img' >> $OUT

$DEBUGFS -R "extents /store/big-data" $TMPFILE 2>&1 | tr / " " | tr -d - | awk '
BEGIN {
	expected_logical_start = 0;
	expected_physical_start = 0;
}
{
	if (NR != 1) {
		level = $1;
		total_levels = $2;

		if (level == total_levels) {
			logical_start=$5;
			logical_end=$6;
			physical_start=$7;
			physical_end=$8;
			len = $9;

			if (logical_end + 1 - logical_start != len) {
				print logical_end + 1 - logical_start, len;
				print "UNEXPECTED LENGTH for extent", $0;
			}
			if (physical_end + 1 - physical_start != len) {
				print physical_end + 1 - physical_start, len;
				print "UNEXPECTED LENGTH for extent", $0;
			}

			if (logical_start != expected_logical_start) {
				print "UNEXPECTED LOGICAL DISCONTINUITY between extents:";
				print "\t", prev;
				print "\t", $0;
			}
			if (physical_start != expected_physical_start &&
				expected_logical_start != 0) {
				print "PHYSICAL DISCONTINUITY between extents:";
				print "\t", prev;
				print "\t", $0;
			}

			expected_logical_start = logical_end + 1;
			expected_physical_start = physical_end + 1;
		}
	}
	prev=$0;
}
END {
    print "Last logical block:", expected_logical_start-1;
    print "Last physical block:", expected_physical_start-1;
}
' >> $OUT 2>&1

rm $TMPFILE

#
# Do the verification
#

sed -f $cmd_dir/filter.sed $OUT > $OUT.new
mv $OUT.new $OUT

cmp -s $OUT $EXP
status=$?

if [ "$status" = 0 ] ; then
	echo "$test_name: $test_description: ok"
	touch $test_name.ok
else
	echo "$test_name: $test_description: failed"
	diff $DIFF_OPTS $EXP $OUT > $test_name.failed
fi

unset IMAGE FSCK_OPT OUT EXP CONF