#! /bin/bash
# FS QA Test No. btrfs/076
#
# Regression test for btrfs incorrect inode ratio detection.
# This was fixed in the following linux kernel patch:
#
#     Btrfs: fix incorrect compression ratio detection
#
#-----------------------------------------------------------------------
# Copyright (c) 2014 Wang Shilong.  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=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	cd /
	rm -fr $tmp
}

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

# real QA test starts here
_supported_fs btrfs
_supported_os Linux
_require_test
_require_scratch

rm -f $seqres.full

_scratch_mkfs >> $seqres.full 2>&1
_scratch_mount "-o compress=lzo"

$XFS_IO_PROG -f -c "pwrite 0 10M" -c "fsync" \
	$SCRATCH_MNT/data >> $seqres.full 2>&1

_extent_count $SCRATCH_MNT/data

$XFS_IO_PROG -f -c "pwrite 0 $((4096*33))" -c "fsync" \
	$SCRATCH_MNT/data >> $seqres.full 2>&1

$XFS_IO_PROG -f -c "pwrite 0 10M" -c "fsync" \
	$SCRATCH_MNT/data >> $seqres.full 2>&1

_extent_count $SCRATCH_MNT/data

status=0
exit