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 29# Testing problem with buffer cache inconsistency 30 31[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 32 33. ../default.cfg 34 35D=$diskimage 36dd if=/dev/zero of=$D bs=1m count=10 status=none || exit 1 37 38odir=`pwd` 39dir=$mntpoint 40 41cd /tmp 42sed '1,/^EOF/d' < $odir/$0 > symlink2.c 43mycc -o symlink2 -Wall symlink2.c 44rm -f symlink2.c 45cd $odir 46 47mount | grep "$mntpoint" | grep md$mdstart > /dev/null && umount $mntpoint 48mdconfig -l | grep md$mdstart > /dev/null && mdconfig -d -u $mdstart 49 50mdconfig -a -t vnode -f $D -u $mdstart 51 52for i in "" "-U"; do 53 [ "$i" = "-U" -a "$newfs_flags" != "-U" ] && continue 54 echo "newfs $i /dev/md$mdstart" 55 newfs $i /dev/md$mdstart > /dev/null 2>&1 56 [ "$i" = "" ] && tunefs -n disable md$mdstart 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 74rm -f /tmp/symlink2 $D 75mdconfig -d -u $mdstart 76exit 77EOF 78#include <stdio.h> 79#include <unistd.h> 80#include <stdlib.h> 81#include <pthread.h> 82#include <err.h> 83#include <string.h> 84#include <sys/wait.h> 85 86static char *path; 87 88int 89main(int argc, char **argv) 90{ 91 int i, n; 92 pid_t p; 93 char buf[128]; 94 95 path = argv[1]; 96 for (i = 0; i < 100; i++) { 97 if ((p = fork()) == 0) { 98 if ((n = readlink(path, buf, sizeof(buf) -1)) < 0) { 99 for (i = 0; i < 60; i++) { 100 sleep(1); 101 if ((n = readlink(path, buf, sizeof(buf) -1)) > 0) { 102 break; 103 } 104 } 105 } 106 if (n < 0) 107 err(1, "readlink(%s). %s:%d", path, __FILE__, __LINE__); 108 exit(0); 109 } 110 } 111 (void) unlink(path); 112 sleep(2); 113 if (symlink("1234", path) < 0) 114 err(1, "symlink(%s, %s)", path, "1234"); 115 116 for (i = 0; i < 100; i++) { 117 if (wait(&n) == -1) 118 err(1, "wait(), %s:%d", __FILE__, __LINE__); 119 } 120 121 return (0); 122} 123