tests/generic/487

#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2018, Jeff Layton <jlayton@redhat.com>
#
# FS QA Test No. 487
#
# Open a file several times, write to it, fsync on all fds and make sure that
# they all return 0. Change the device to start throwing errors. Write again
# on all fds and fsync on all fds. Ensure that we get errors on all of them.
# Then fsync on all one last time and verify that all return 0.
#
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 -f $tmp.*
	_dmerror_cleanup
}

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

# real QA test starts here
_require_scratch_nocheck

sflag='-s'
case $FSTYP in
        btrfs)
                _notrun "btrfs has a specialized test for this"
                ;;
        *)
                ;;
esac

_require_logdev
_require_dm_target error

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

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

datalen=65536
_require_fs_space $SCRATCH_MNT $datalen

# use fd 5 to hold file open
testfile=$SCRATCH_MNT/fsync-open-after-err
exec 5>$testfile

# write some data to file and fsync it out
$XFS_IO_PROG -c "pwrite -q 0 $datalen" -c fsync $testfile

# flip device to non-working mode
_dmerror_load_error_table

# rewrite the data, call sync to ensure it's written back w/o scraping error
$XFS_IO_PROG -c "pwrite -q 0 $datalen" -c sync $testfile

# heal the device error
_dmerror_load_working_table

# open again and call fsync
echo "The following fsync should fail with EIO:"
$XFS_IO_PROG -c fsync $testfile
echo "done"

# close file
exec 5>&-

# success, all done
_dmerror_cleanup

status=0
exit