tests/generic/348

#! /bin/bash
# FSQA Test No. 348
#
# Test creating a symlink, fsync its parent directory, power fail and mount
# again the filesystem. After these steps the symlink should exist and its
# content must match what we specified when we created it (must not be empty
# or point to something else).
#
#-----------------------------------------------------------------------
#
# Copyright (C) 2016 SUSE Linux Products GmbH. All Rights Reserved.
# Author: Filipe Manana <fdmanana@suse.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"
tmp=/tmp/$$
status=1	# failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	_cleanup_flakey
	cd /
	rm -f $tmp.*
}

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

# real QA test starts here
_supported_fs generic
_supported_os Linux
_require_scratch
_require_dm_target flakey

rm -f $seqres.full

_scratch_mkfs >>$seqres.full 2>&1
_require_metadata_journaling $SCRATCH_DEV
_init_flakey
_mount_flakey

mkdir $SCRATCH_MNT/testdir1
# Make sure it's durably persisted.
sync

# Create our symlinks and fsync their parent directories.
# We test both the case where the parent directory is new (not yet durably
# persisted) and where the parent existed long time before.
ln -s $SCRATCH_MNT/foo1 $SCRATCH_MNT/testdir1/bar1
$XFS_IO_PROG -c fsync $SCRATCH_MNT/testdir1
mkdir $SCRATCH_MNT/testdir2
ln -s $SCRATCH_MNT/foo2 $SCRATCH_MNT/testdir2/bar2
$XFS_IO_PROG -c fsync $SCRATCH_MNT/testdir2

# After a power failure and mounting again the filesystem, we expect to see the
# symlinks and we expect them to point to foo1 and foo2.
_flakey_drop_and_remount

echo "Symlink contents after log replay:"
readlink $SCRATCH_MNT/testdir1/bar1 | _filter_scratch
readlink $SCRATCH_MNT/testdir2/bar2 | _filter_scratch

_unmount_flakey
status=0
exit