#! /bin/bash
# FS QA Test No. 004
#
# exercise xfs_db bug #789674 and other freesp functionality
#
#-----------------------------------------------------------------------
# Copyright (c) 2000-2002 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=0

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

_populate_scratch()
{
	echo "=== mkfs output ===" >>$seqres.full
	_scratch_mkfs_xfs | tee -a $seqres.full | _filter_mkfs 2>$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
	_scratch_unmount			# 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

_require_scratch
_require_no_large_scratch_dev

rm -f $seqres.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" >>$seqres.full
echo "blocksize from mkfs is '$dbsize'" >>$seqres.full

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

# check the 'blocks' field from freesp command is OK
#  - starting with Linux 4.10-rc the bmbt split reservation moved to be per-AG
perl -ne '
	BEGIN	{ $avail ='$avail' * 512 + ('$resblks' * '$dbsize');
		  $answer="(no xfs_db free blocks line?)" }
	/free blocks (\d+)$/	|| next;
	$freesp = $1 * '$dbsize';
	if ($freesp == $avail + ('$agcount') * '$dbsize' * 8) {
		$answer = "yes";
	} elsif ($freesp == $avail + (('$agcount' + 1) * '$dbsize' * 4)) {
		$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