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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
#
# FSQA Test No. 479
#
# Test that when a fsync journal/log exists, if we rename a special file (fifo,
# symbolic link or device), create a hard link for it with its old name and then
# commit the journal/log, if a power loss happens the filesystem will not fail
# to replay the journal/log when it is mounted the next time.
#
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
run_test()
{
local file_type=$1
_scratch_mkfs >>$seqres.full 2>&1
_require_metadata_journaling $SCRATCH_DEV
_init_flakey
_mount_flakey
mkdir $SCRATCH_MNT/testdir
case $file_type in
symlink)
ln -s xxx $SCRATCH_MNT/testdir/foo
;;
fifo)
mkfifo $SCRATCH_MNT/testdir/foo
;;
dev)
mknod $SCRATCH_MNT/testdir/foo c 0 0
;;
*)
_fail "Invalid file type argument: $file_type"
esac
# Make sure everything done so far is durably persisted.
sync
# Create a file and fsync it just to create a journal/log. This file
# must be in the same directory as our special file "foo".
touch $SCRATCH_MNT/testdir/f1
$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir/f1
# Rename our special file and then create link that has its old name.
mv $SCRATCH_MNT/testdir/foo $SCRATCH_MNT/testdir/bar
ln $SCRATCH_MNT/testdir/bar $SCRATCH_MNT/testdir/foo
# Create a second file and fsync it. This is just to durably persist the
# fsync journal/log which is typically modified by the previous rename
# and link operations. This file does not need to be placed in the same
# directory as our special file.
touch $SCRATCH_MNT/f2
$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/f2
# Simulate a power failure and mount the filesystem to check that
# replaying the fsync log/journal succeeds, that is the mount operation
# does not fail.
_flakey_drop_and_remount
_unmount_flakey
_cleanup_flakey
}
run_test symlink
run_test fifo
run_test dev
echo "Silence is golden"
status=0
exit
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