| #! /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 |