tests/generic/031

#! /bin/bash
# FS QA Test No. generic/031
#
# Test non-aligned writes against fcollapse to ensure that partial pages are
# correctly written and aren't left behind causing invalidation or data
# corruption issues.
#
#-----------------------------------------------------------------------
# Copyright (c) 2014 Red Hat, 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=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

# Modify as appropriate.
_supported_fs generic
_supported_os Linux
_require_scratch
_require_xfs_io_command "fcollapse"

testfile=$SCRATCH_MNT/testfile

_scratch_mkfs > /dev/null 2>&1
_scratch_mount

$XFS_IO_PROG -f \
	-c "pwrite 185332 55756" \
	-c "fcollapse 28672 40960" \
	-c "pwrite 133228 63394" \
	-c "fcollapse 0 4096" \
$testfile | _filter_xfs_io

echo "==== Pre-Remount ==="
hexdump -C $testfile
_scratch_cycle_mount
echo "==== Post-Remount =="
hexdump -C $testfile

status=0
exit