#! /bin/bash
# FS QA Test No. 201
#
# Test out the infamous xfs_btree_delrec corruption.
#
# Only happens on 32-bit kernels without CONFIG_LBD, but it should be harmless
# to run this everywhere.
#
#-----------------------------------------------------------------------
# Copyright (c) 2009 Christoph Hellwig.
#
# 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!

_cleanup()
{
	_scratch_unmount
}
trap "_cleanup; exit \$status" 0 1 2 3 15

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

# real QA test starts here
_supported_fs xfs
_supported_os Linux

file=$SCRATCH_MNT/f

min_align=`_min_dio_alignment $SCRATCH_DEV`

do_pwrite()
{
	offset=`expr $1 \* $min_align`
	end=`expr $2 \* $min_align`
	length=`expr $end - $offset`

	xfs_io -d -f $file -c "pwrite $offset $length" >/dev/null
}

_require_scratch

_scratch_mkfs_xfs >/dev/null 2>&1
_scratch_mount

# Create a fragmented file
do_pwrite 30792 31039
do_pwrite 30320 30791
do_pwrite 29688 30319
do_pwrite 29536 29687
do_pwrite 27216 29535
do_pwrite 24368 27215
do_pwrite 21616 24367
do_pwrite 20608 21615
do_pwrite 19680 20607
do_pwrite 19232 19679
do_pwrite 17840 19231
do_pwrite 16928 17839
do_pwrite 15168 16927
do_pwrite 14048 15167
do_pwrite 12152 14047
do_pwrite 11344 12151
do_pwrite 8792 11343
do_pwrite 6456 8791
do_pwrite 5000 6455
do_pwrite 1728 4999
do_pwrite 0 1727

sync
sync

# and truncate it again
> $SCRATCH_MNT/bigfile

# success, all done
echo "*** done"
rm -f $seqres.full
status=0
