1#!/bin/sh 2 3# 4# Copyright (c) 2008 Peter Holm <pho@FreeBSD.org> 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28# $FreeBSD$ 29# 30 31# Testing problem with buffer cache inconsistancy 32 33[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 34 35. ../default.cfg 36 37D=$diskimage 38dede $D 1m 10 || exit 1 39 40odir=`pwd` 41dir=$mntpoint 42 43cd /tmp 44sed '1,/^EOF/d' < $odir/$0 > symlink2.c 45cc -o symlink2 -Wall symlink2.c 46rm -f symlink2.c 47cd $odir 48 49mount | grep "$mntpoint" | grep md${mdstart} > /dev/null && umount $mntpoint 50mdconfig -l | grep md${mdstart} > /dev/null && mdconfig -d -u ${mdstart} 51 52mdconfig -a -t vnode -f $D -u ${mdstart} 53 54for i in "" "-U"; do 55 echo "newfs $i /dev/md${mdstart}" 56 newfs $i /dev/md${mdstart} > /dev/null 2>&1 57 mount /dev/md${mdstart} $mntpoint 58 mkdir ${mntpoint}/dir 59 60 /tmp/symlink2 ${mntpoint}/dir/link 61 62 ls -l ${mntpoint}/dir > /dev/null 2>&1 63 if [ $? -ne 0 ]; then 64 set -x 65 ls -l ${mntpoint}/dir 66 umount $mntpoint 67 mount /dev/md${mdstart} $mntpoint 68 ls -l ${mntpoint}/dir 69 set +x 70 fi 71 72 umount -f ${mntpoint} 73done 74mdconfig -d -u $mdstart 75exit 76EOF 77#include <stdio.h> 78#include <unistd.h> 79#include <stdlib.h> 80#include <pthread.h> 81#include <err.h> 82#include <string.h> 83#include <sys/wait.h> 84 85static char *path; 86 87int 88main(int argc, char **argv) 89{ 90 int i, n; 91 pid_t p; 92 char buf[128]; 93 94 path = argv[1]; 95 for (i = 0; i < 100; i++) { 96 if ((p = fork()) == 0) { 97 if ((n = readlink(path, buf, sizeof(buf) -1)) < 0) { 98 for (i = 0; i < 60; i++) { 99 sleep(1); 100 if ((n = readlink(path, buf, sizeof(buf) -1)) > 0) { 101 break; 102 } 103 } 104 } 105 if (n < 0) 106 err(1, "readlink(%s). %s:%d", path, __FILE__, __LINE__); 107 exit(0); 108 } 109 } 110 (void) unlink(path); 111 sleep(2); 112 if (symlink("1234", path) < 0) 113 err(1, "symlink(%s, %s)", path, "1234"); 114 115 for (i = 0; i < 100; i++) { 116 if (wait(&n) == -1) 117 err(1, "wait(), %s:%d", __FILE__, __LINE__); 118 } 119 120 return (0); 121} 122