tests/generic/468

#! /bin/bash
# FS QA Test No. 468
#
# Use dm-log-writes to verify that MAP_SYNC actually syncs metadata during
# page faults.
#
#-----------------------------------------------------------------------
# Copyright (c) 2017 Intel Corporation.  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`
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	_log_writes_cleanup
}

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

# remove previous $seqres.full before test
rm -f $seqres.full

# real QA test starts here
_supported_fs generic
_supported_os Linux
_require_log_writes
_require_scratch_dax
_require_xfs_io_command "log_writes"

_log_writes_init
_log_writes_mkfs >> $seqres.full 2>&1
_log_writes_mount -o dax

LEN=$((1024 * 1024)) # 1 MiB

xfs_io -t -c "truncate $LEN" -c "mmap -S 0 $LEN" -c "mwrite 0 $LEN" \
	-c "log_writes -d $LOGWRITES_NAME -m preunmap" \
	-f $SCRATCH_MNT/test > /dev/null 2>&1

# Unmount the scratch dir and tear down the log writes target
_log_writes_unmount
_log_writes_remove
_check_scratch_fs

# destroy previous filesystem so we can be sure our rebuild works
_scratch_mkfs >> $seqres.full 2>&1

# check pre-unmap state
_log_writes_replay_log preunmap
_scratch_mount

# We should see $SCRATCH_MNT/test as having 1 MiB in block allocations
stat -c "%s" $SCRATCH_MNT/test

_scratch_unmount
_check_scratch_fs

echo "Silence is golden"
status=0
exit