1#!/bin/sh 2 3# 4# Copyright (c) 2011 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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 30 31# Demonstrate premature "out of inodes" problem with SU 32 33. ../default.cfg 34 35here=`pwd` 36cd /tmp 37sed '1,/^EOF/d' < $here/$0 > linger.c 38mycc -o linger -Wall -O2 linger.c 39rm -f linger.c 40cd $here 41 42mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint 43mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart 44mdconfig -a -t swap -s 1g -u $mdstart 45[ $# -eq 1 ] && opt="$1" 46[ $# -eq 0 ] && opt=$newfs_flags # No argument == default flag 47echo "newfs $opt md$mdstart" 48newfs $opt md$mdstart > /dev/null 49mount /dev/md$mdstart $mntpoint 50chmod 777 $mntpoint 51 52if ! su $testuser -c "cd $mntpoint; /tmp/linger $size"; then 53 min=2 54 [ -r $mntpoint/.sujournal ] && min=3 55 r=`df -hi $mntpoint | head -1` 56 echo " $r" 57 for i in `jot 10`; do 58 r=`df -hi $mntpoint | tail -1` 59 echo "`date '+%T'` $r" 60 [ `echo $r | awk '{print $6}'` = $min ] && break 61 sleep 10 62 done 63 ls -lR $mntpoint 64fi 65 66while mount | grep "$mntpoint " | grep -q /dev/md; do 67 umount $mntpoint || sleep 1 68done 69mdconfig -d -u $mdstart 70rm -f /tmp/linger 71exit 72EOF 73#include <sys/mount.h> 74#include <sys/param.h> 75#include <sys/stat.h> 76#include <sys/wait.h> 77 78#include <err.h> 79#include <errno.h> 80#include <fcntl.h> 81#include <sched.h> 82#include <stdio.h> 83#include <stdlib.h> 84#include <time.h> 85#include <unistd.h> 86 87#define PARALLEL 10 88#define TIMEOUT 1200 89static int size = 6552; /* 10 free inodes */ 90 91static int 92test(void) 93{ 94 int fd, i, j; 95 pid_t pid; 96 char file[128]; 97 98 for (;;) { 99 if (access("rendezvous", R_OK) == 0) 100 break; 101 sched_yield(); 102 } 103 pid = getpid(); 104 for (j = 0; j < size; j++) { 105 sprintf(file,"p%05d.%05d", pid, j); 106 if ((fd = creat(file, 0660)) == -1) { 107 if (errno != EINTR) { 108 warn("creat(%s). %s:%d", file, __FILE__, __LINE__); 109 unlink("continue"); 110 break; 111 } 112 } 113 if (fd != -1 && close(fd) == -1) 114 err(2, "close(%d)", j); 115 116 } 117 sleep(3); 118 119 for (i = --j; i >= 0; i--) { 120 sprintf(file,"p%05d.%05d", pid, i); 121 if (unlink(file) == -1) 122 warn("unlink(%s)", file); 123 124 } 125 return (0); 126} 127 128int 129main(void) 130{ 131 time_t start; 132 int error = 0, fd, i, j, status; 133 134 umask(0); 135 if ((fd = open("continue", O_CREAT, 0644)) == -1) 136 err(1, "open()"); 137 close(fd); 138 start = time(NULL); 139 for (i = 0; i < 100; i++) { 140 for (j = 0; j < PARALLEL; j++) { 141 if (fork() == 0) { 142 test(); 143 exit(0); 144 } 145 } 146 147 if ((fd = open("rendezvous", O_CREAT, 0644)) == -1) 148 err(1, "open()"); 149 close(fd); 150 151 for (j = 0; j < PARALLEL; j++) { 152 wait(&status); 153 error += status; 154 } 155 156 unlink("rendezvous"); 157 if (access("continue", R_OK) == -1) 158 break; 159 if (time(NULL) - start > TIMEOUT) { 160 fprintf(stderr, "FAIL Timeout\n"); 161 break; 162 } 163 } 164 unlink("continue"); 165 166 return (error != 0); 167} 168