apfstests/tests/generic/250

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016, Oracle and/or its affiliates.  All Rights Reserved.
#
# FS QA Test No. 250
#
# Create an unwritten extent, set up dm-error, try a DIO write, then
# make sure we can't read back old disk contents.
#
seq=`basename $0`
seqres=$RESULT_DIR/$seq
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1    # failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
    cd /
    rm -rf $tmp.* $testdir
    _dmerror_cleanup
}

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

# real QA test starts here
_require_scratch
_require_dm_target error
_require_xfs_io_command "falloc"
_require_odirect

rm -f $seqres.full

# Disable the scratch rt device to avoid test failures relating to the rt
# bitmap consuming all the free space in our small data device.
unset SCRATCH_RTDEV

fssize=$((196 * 1048576))
echo "Format and mount"
$XFS_IO_PROG -d -c "pwrite -S 0x69 -b 1048576 0 $fssize" $SCRATCH_DEV >> $seqres.full
_scratch_mkfs_sized $fssize > $seqres.full 2>&1
_dmerror_init
_dmerror_mount >> $seqres.full 2>&1
_dmerror_unmount
_dmerror_mount

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

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

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

echo "Create the original files"
$XFS_IO_PROG -f -c "falloc 0 $filesize" $testdir/file2 >> $seqres.full
_dmerror_unmount
_dmerror_mount

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

echo "Write and unmount"
$XFS_IO_PROG -f -c "pwrite -S 0x63 $bufsize 1" $testdir/file2 >> $seqres.full
sync
_dmerror_load_error_table
$XFS_IO_PROG -d -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" $testdir/file2 \
	>> $seqres.full 2>&1
_dmerror_load_working_table
_dmerror_unmount
_dmerror_mount

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

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

# success, all done
status=0
exit