#! /bin/bash
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (c) 2021 Oracle.  All Rights Reserved.
#
# FS QA Test No. 628
#
# Make sure that reflink forces the log out if we open the file with O_SYNC or
# set FS_XFLAG_SYNC on the file.  We test that it actually forced the log by
# using dm-error to shut down the fs without flushing the log and then
# remounting to check file contents.  This is a regression test for commit
# 5ffce3cc22a0 ("xfs: force the log after remapping a synchronous-writes file")

. ./common/preamble
_begin_fstest auto quick rw clone eio

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

# Import common functions.
. ./common/filter
. ./common/reflink
. ./common/dmerror

# real QA test starts here
_supported_fs generic
_require_scratch_reflink
_require_dm_target error
_require_xfs_io_command "chattr" "s"
_require_cp_reflink

# Format filesystem and set up quota limits
_scratch_mkfs > $seqres.full
_require_metadata_journaling $SCRATCH_DEV
_dmerror_init
_dmerror_mount

# Test that O_SYNC actually results in file data being written even if the
# fs immediately dies
echo "test o_sync write"
$XFS_IO_PROG -x -f -s -c "pwrite -S 0x58 0 1m -b 1m" $SCRATCH_MNT/0 >> $seqres.full
_dmerror_load_error_table
_dmerror_unmount
_dmerror_load_working_table
_dmerror_mount
md5sum $SCRATCH_MNT/0 | _filter_scratch

# Set up initial files for reflink test
$XFS_IO_PROG -f -c 'pwrite -S 0x58 0 1m -b 1m' $SCRATCH_MNT/a >> $seqres.full
$XFS_IO_PROG -f -c 'pwrite -S 0x59 0 1m -b 1m' $SCRATCH_MNT/c >> $seqres.full
_cp_reflink $SCRATCH_MNT/a $SCRATCH_MNT/e
_cp_reflink $SCRATCH_MNT/c $SCRATCH_MNT/d
touch $SCRATCH_MNT/b
sync

# Test that reflink forces dirty data/metadata to disk when destination file
# opened with O_SYNC
echo "test reflink flag not set o_sync"
$XFS_IO_PROG -x -s -c "reflink $SCRATCH_MNT/a" $SCRATCH_MNT/b >> $seqres.full
_dmerror_load_error_table
_dmerror_unmount
_dmerror_load_working_table
_dmerror_mount
md5sum $SCRATCH_MNT/a $SCRATCH_MNT/b | _filter_scratch

# Test that reflink to a shared file forces dirty data/metadata to disk when
# destination is opened with O_SYNC
echo "test reflink flag already set o_sync"
$XFS_IO_PROG -x -s -c "reflink $SCRATCH_MNT/a" $SCRATCH_MNT/d >> $seqres.full
_dmerror_load_error_table
_dmerror_unmount
_dmerror_load_working_table
_dmerror_mount
md5sum $SCRATCH_MNT/a $SCRATCH_MNT/d | _filter_scratch

# Set up the two files with chattr +S
rm -f $SCRATCH_MNT/b $SCRATCH_MNT/d
_cp_reflink $SCRATCH_MNT/c $SCRATCH_MNT/d
touch $SCRATCH_MNT/b
chattr +S $SCRATCH_MNT/b $SCRATCH_MNT/d
sync

# Test that reflink forces dirty data/metadata to disk when destination file
# has the sync iflag set
echo "test reflink flag not set iflag"
$XFS_IO_PROG -x -c "reflink $SCRATCH_MNT/a" $SCRATCH_MNT/b >> $seqres.full
_dmerror_load_error_table
_dmerror_unmount
_dmerror_load_working_table
_dmerror_mount
md5sum $SCRATCH_MNT/a $SCRATCH_MNT/b | _filter_scratch

# Test that reflink to a shared file forces dirty data/metadata to disk when
# destination file has the sync iflag set
echo "test reflink flag already set iflag"
$XFS_IO_PROG -x -c "reflink $SCRATCH_MNT/a" $SCRATCH_MNT/d >> $seqres.full
_dmerror_load_error_table
_dmerror_unmount
_dmerror_load_working_table
_dmerror_mount
md5sum $SCRATCH_MNT/a $SCRATCH_MNT/d | _filter_scratch

# success, all done
status=0
exit