#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016, Oracle and/or its affiliates.  All Rights Reserved.
#
# FS QA Test No. 240
#
# Test AIO CoW behavior when the write temporarily fails.
#
. ./common/preamble
_begin_fstest auto quick clone eio

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

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

_require_scratch_reflink
_require_cp_reflink
_require_dm_target error
_require_xfs_io_command "cowextsize"
_require_aiodio "aiocp"
AIO_TEST="$here/src/aio-dio-regress/aiocp"

echo "Format and mount"
_scratch_mkfs > $seqres.full 2>&1
_dmerror_init
_dmerror_mount >> $seqres.full 2>&1

testdir=$SCRATCH_MNT/test-$seq
mkdir $testdir

blksz=65536
_require_congruent_file_oplen $SCRATCH_MNT $blksz
nr=640
bufnr=128
filesize=$((blksz * nr))
bufsize=$((blksz * bufnr))
filesize=$filesize
bufsize=$bufsize

_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))

echo "Create the original files"
$XFS_IO_PROG -c "cowextsize $((bufsize * 2))" $testdir
$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
_dmerror_unmount
_dmerror_mount

echo "Compare files"
md5sum $testdir/file1 | _filter_scratch
md5sum $testdir/file2 | _filter_scratch

echo "CoW and unmount"
$XFS_IO_PROG -f -c "pwrite -S 0x63 $bufsize 1" $testdir/file2 >> $seqres.full
$XFS_IO_PROG -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" $TEST_DIR/moo >> $seqres.full
_scratch_sync
_dmerror_load_error_table
# If the filesystem supports delalloc, then the fdatasync will report an IO
# error.  If the write goes directly to disk, then aiocp will return nonzero.
unset write_failed
$AIO_TEST -b $bufsize $TEST_DIR/moo $testdir/file2 >> $seqres.full 2>&1 || \
	write_failed=1
$XFS_IO_PROG -c "fdatasync" $testdir/file2 |& \
		_filter_flakey_EIO "fdatasync: Input/output error" | \
		grep -q 'Input.output error' && \
		write_failed=1
test -n $write_failed && echo "write failed"

_dmerror_load_working_table
_dmerror_unmount
_dmerror_mount

echo "Compare files"
md5sum $testdir/file1 | _filter_scratch
md5sum $testdir/file2 | _filter_scratch

echo "Check for damage"
_dmerror_unmount
_dmerror_cleanup
_repair_scratch_fs >> $seqres.full

# success, all done
status=0
exit
