tests/generic/335

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2016 SUSE Linux Products GmbH. All Rights Reserved.
#
# FSQA Test No. 335
#
# Test that if we move one file between directories, fsync the parent directory
# of the old directory, power fail and remount the filesystem, the file is not
# lost and it's located at the destination directory.
#
. ./common/preamble
_begin_fstest auto quick metadata log

# Override the default cleanup function.
_cleanup()
{
	_cleanup_flakey
	cd /
	rm -f $tmp.*
}

# Import common functions.
. ./common/filter
. ./common/dmflakey

_require_scratch
_require_dm_target flakey

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

# Create our test directories and the file we will later check if it has
# disappeared.
mkdir -p $SCRATCH_MNT/a/b
mkdir $SCRATCH_MNT/c
touch $SCRATCH_MNT/a/b/foo

# Make sure everything is durably persisted.
_scratch_sync

# Now move our test file into a new parent directory.
mv $SCRATCH_MNT/a/b/foo $SCRATCH_MNT/c/

# Create a new file inside the parent directory of the directory where our test
# file foo was previously at. This is just to ensure the fsync we do next
# against that parent directory actually does something and it's not a noop.
touch $SCRATCH_MNT/a/bar
$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/a

# btrfs can not guarantee that when we fsync a directory all its subdirectories
# created on past transactions are fsynced as well. It may do it sometimes, but
# it's not guaranteed, giving such guarantees would be too expensive for large
# directories and posix does not require that recursive behaviour. So if we want
# the rename of "foo" to be persisted, explicitly fsync "foo".
if [ $FSTYP == "btrfs" ]; then
	$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/c/foo
fi

echo "Filesystem content before power failure:"
ls -R $SCRATCH_MNT/a $SCRATCH_MNT/c | _filter_scratch

# Simulate a power failure / crash and remount the filesystem, so that the
# journal/log is replayed.
_flakey_drop_and_remount

# We expect our file foo to exist, have an entry in the new parent
# directory (c/) and not have anymore an entry in the old parent directory
# (a/b/).
# The new file named bar should also exist.
echo "Filesystem content after power failure:"
# Must match what we had before the power failure.
ls -R $SCRATCH_MNT/a $SCRATCH_MNT/c | _filter_scratch

_unmount_flakey

status=0
exit