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Make sure we take into account newly reserved blocks as introduced
in 964468.
Merge of master-melb:xfs-cmds:29013a by kenmcd.

#! /bin/sh
# FS QA Test No. 004
#
# exercise xfs_db bug #789674 and other freesp functionality
#
#-----------------------------------------------------------------------
# Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
#-----------------------------------------------------------------------
#
# creator
owner=nathans@sgi.com

seq=`basename $0`
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=0

_cleanup()
{
	umount $SCRATCH_MNT
	rm -f $tmp.*
	exit $status
}
trap "_cleanup" 0 1 2 3 15

_populate_scratch()
{
	echo "=== mkfs output ===" >>$seq.full
	_scratch_mkfs_xfs | tee -a $seq.full | _filter_mkfs 2>$tmp.mkfs
	. $tmp.mkfs
	_scratch_mount
	dd if=/dev/zero of=$SCRATCH_MNT/foo count=200 bs=4096 >/dev/null 2>&1 &
	dd if=/dev/zero of=$SCRATCH_MNT/goo count=400 bs=4096 >/dev/null 2>&1 &
	dd if=/dev/zero of=$SCRATCH_MNT/moo count=800 bs=4096 >/dev/null 2>&1 &
	wait
	umount $SCRATCH_MNT			# flush everything
	_scratch_mount				# and then remount
}


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

# real QA test starts here
_supported_fs xfs
_supported_os IRIX Linux

_need_to_be_root
_require_scratch
_require_nobigloopfs

rm -f $seq.full

_populate_scratch

[ "$HOSTOS" = "Linux" ] && DF_PROG="$DF_PROG -P --block-size=512"

eval `$DF_PROG $SCRATCH_MNT 2>&1 \
	| tail -1 | $AWK_PROG '{ printf "blocks=%u used=%u avail=%u\n", $3, $4, $5 }'`
echo "df gave: blocks=$blocks used=$used avail=$avail" >>$seq.full
echo "blocksize from mkfs is '$dbsize'" >>$seq.full

xfs_db -r -c "freesp -s" $SCRATCH_DEV >$tmp.xfs_db
echo "xfs_db for $SCRATCH_DEV" >>$seq.full
cat $tmp.xfs_db >>$seq.full

eval `$XFS_IO_PROG -x -c resblks $SCRATCH_MNT 2>&1 \
	| $AWK_PROG '/available/ { printf "resblks=%u\n", $5 }'`
echo "resblks gave: resblks=$resblks" >>$seq.full

# check the 'blocks' field from freesp command is OK
# since 2.6.18, df does not report the 4 blocks per AG that cannot
# be allocated, hence we check for that exact mismatch.
# since ~2.6.22, reserved blocks are used by default and df does
# not report them, hence check for an exact mismatch.
perl -ne '
	BEGIN	{ $avail ='$avail' * 512;
		  $answer="(no xfs_db free blocks line?)" }
	/free blocks (\d+)$/	|| next;
	$freesp = $1 * '$dbsize';
	if ($freesp == $avail) {
		$answer = "yes";
	} else {
		$avail = $avail + (('$agcount' + 1) * '$dbsize' * 4);
		if ($freesp == $avail) {
			$answer = "yes";
		} else {
			$avail = $avail + ('$resblks' * '$dbsize');
			if ($freesp == $avail) {
				$answer = "yes";
			} else {
				$answer = "no ($freesp != $avail)";
			}
		}
	}
	END	{ print "$answer\n" }
	' <$tmp.xfs_db >$tmp.ans
ans="`cat $tmp.ans`"
echo "Checking blocks column same as df: $ans"
if [ "$ans" != yes ]
then
	echo "Error: $SCRATCH_DEV: freesp mismatch: $ans"
	echo "xfs_db output ..."
	cat $tmp.xfs_db
	status=1
fi

# check the 'pct' field from freesp command is good
perl -ne '
	    BEGIN	{ $percent = 0; }
	    /free/	&& next;	# skip over free extent size number
	    if (/\s+(\d+\.\d+)$/) {
		$percent += $1;
	    }
	    END	{ $percent += 0.5; print int($percent), "\n" }	# round up
' <$tmp.xfs_db >$tmp.ans
ans="`cat $tmp.ans`"
echo "Checking percent column yields 100: $ans"
if [ "$ans" != 100 ]
then
	echo "Error: $SCRATCH_DEV: pct mismatch: $ans (expected 100)"
	echo "xfs_db output ..."
	cat $tmp.xfs_db
	status=1
fi

exit