1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2021 Peter Holm <pho@FreeBSD.org> 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29# ftruncate+mmap+fsync fails for small maps 30# https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=225586 31 32# Original test scenario by tris_vern@hotmail.com 33 34# Fixed in r328773: 35# On pageout, in vnode generic pager, for partially dirty page, only 36# clear dirty bits for completely invalid blocks. 37 38. ../default.cfg 39 40cat > /tmp/mmap33.c <<EOF 41#include <sys/mman.h> 42 43#include <err.h> 44#include <fcntl.h> 45#include <stdio.h> 46#include <stdlib.h> 47#include <string.h> 48#include <unistd.h> 49 50int 51main (int argc, char *argv[]) 52{ 53 size_t i, size1, size2; 54 int fd; 55 char *data; 56 char *filename; 57 char pattern = 0x01; 58 59 if (argc != 4) { 60 fprintf(stderr, "Usage: %s filename size1 size2\n", argv[0]); 61 exit(1); 62 } 63 64 filename = argv[1]; 65 size1 = atoi(argv[2]); 66 size2 = atoi(argv[3]); 67 68 fd = open(filename, O_RDWR | O_TRUNC | O_CREAT, 0644); 69 for (i = 0; i < size1; i++) 70 write(fd, &pattern, 1); 71 close(fd); 72 73 fd = open(filename, O_RDWR, 0644); 74 if (fd == -1) 75 err(1, "open(%s)", filename); 76 if (ftruncate(fd, size2) == -1) 77 err(1, "ftruncate()"); 78 data = mmap(NULL, size2, PROT_READ|PROT_WRITE,MAP_SHARED, fd, 0); 79 if (data == MAP_FAILED) 80 err(1, "mmap()"); 81 memset(data, 0xFF, size2); 82 83 if (munmap(data, size2) == -1) 84 err(1, "munmap"); 85 close(fd); 86 87 return (0); 88} 89EOF 90cc -o /tmp/mmap33 -Wall -Wextra -O2 -g /tmp/mmap33.c || exit 1 91rm /tmp/mmap33.c 92 93set -e 94mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint 95[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart 96mdconfig -a -t swap -s 2g -u $mdstart 97newfs $newfs_flags -n md$mdstart > /dev/null 98mount /dev/md$mdstart $mntpoint 99set +e 100 101file=file 102odir=`pwd` 103cd $mntpoint 104/tmp/mmap33 $file 1024 511 105s=$? 106sum1=`md5 < $mntpoint/$file` 107[ -f mmap33.core -a $s -eq 0 ] && 108 { ls -l mmap33.core; mv mmap33.core /tmp; s=1; } 109cd $odir 110umount $mntpoint 111mount /dev/md$mdstart $mntpoint 112# This fails for truncate size < 512 113sum2=`md5 < $mntpoint/$file` 114[ $sum1 = $sum2 ] || 115 { s=2; echo "md5 fingerprint differs."; } 116umount $mntpoint 117 118mdconfig -d -u $mdstart 119rm /tmp/mmap33 120exit $s 121