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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2010 Red Hat, Inc. All Rights Reserved.
#
# FS QA Test No. 247
#
# Test for race between direct I/O and mmap
#
. ./common/preamble
_begin_fstest auto quick rw
_register_cleanup "_cleanup" BUS
# Override the default cleanup function.
_cleanup()
{
cd /
rm -f $tmp.* $testfile
wait
}
# Import common functions.
. ./common/filter
# real QA test starts here
# Modify as appropriate.
_supported_fs generic
_require_test
# this test leaves a 512MB file around if we abort the test during the run via a
# reboot or kernel panic. Hence just name the file $seq so that we can always
# clean up on the next run and not leave large stale files around on the testdir
# that can lead to ENOSPC issues over time.
testfile=$TEST_DIR/$seq
rm -f $testfile
loops=500
iosize=1048576
# Initialise file
dd if=/dev/zero of=$testfile bs=$iosize count=$loops &> /dev/null
[ $? -ne 0 ] && exit
sync
# Direct I/O overwriter
dd if=/dev/zero of=$testfile oflag=direct bs=$iosize count=$loops conv=notrunc &> /dev/null &
[ $? -ne 0 ] && exit
# Mmap writer
start=`expr $loops - 1`
for i in `seq $start -1 0`
do
offset=`expr $i \* $iosize`
$XFS_IO_PROG -f -c "mmap -w $offset $iosize" -c "mwrite $offset $iosize" $testfile
[ $? -ne 0 ] && exit
done
wait
echo "Silence is golden."
# unmount and check dmesg, filtering out expected warnings about mixed
# mmap/dio
_test_unmount
_check_dmesg _filter_aiodio_dmesg
status=$?
exit
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