tests/generic/096

#! /bin/bash
# FS QA Test 096
#
# Exercise the situation that cause ext4 to BUG_ON() when we use
# zero range to zero a range which starts within the isize but ends
# past the isize but still in the same block. This particular problem
# has only been seen on systems with page_size > block_size.
#
#-----------------------------------------------------------------------
# Copyright (c) 2015 Red Hat, Inc., Lukas Czerner <lczerner@redhat.com>
#
# 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 -f $tmp.*
}

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

# real QA test starts here
_supported_fs generic
_supported_os Linux
_require_scratch
_require_xfs_io_command "fzero"

rm -f $seqres.full
echo "Silence is golden"

# Use smaller scratch fs to shorten the test time
_scratch_mkfs_sized $((512 * 1024 * 1024)) >>$seqres.full 2>&1
_scratch_mount

testfile=$SCRATCH_MNT/$seq.$$
$XFS_IO_PROG -f -c "pwrite 4096 512" -c "fzero 4351 512" $testfile >> $seqres.full 2>&1

# success, all done
status=0
exit