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 premature disk full problem with symlinks. 30# Not seen as of 20210117. 31 32[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 33 34. ../default.cfg 35dbt=`sysctl -n vfs.dirtybufthresh` 36[ $dbt -lt 1000 ] && echo "Note: vfs.dirtybufthresh = $dbt" 37 38D=$diskimage 39dd if=/dev/zero of=$D bs=1m count=128 status=none || exit 1 40 41odir=`pwd` 42dir=$mntpoint 43 44cd /tmp 45sed '1,/^EOF/d' < $odir/$0 > symlink.c 46mycc -o symlink -Wall -Wextra symlink.c || exit 1 47rm -f symlink.c 48cd $odir 49 50mount | grep -q "on $mntpoint " && umount $mntpoint 51mdconfig -l | grep md$mdstart > /dev/null && mdconfig -d -u $mdstart 52 53mdconfig -a -t vnode -f $D -u $mdstart 54 55tst() { 56 local i j k 57 58 cd $dir 59 i=`df -ik $mntpoint | tail -1 | awk '{printf "%d\n", ($7 - 500)/2}'` 60 [ $i -gt 20000 ] && i=20000 61 62 for k in `jot 3`; do 63 for j in `jot 2`; do 64 /tmp/symlink $i & 65 done 66 wait 67 done 68 cd $odir 69} 70 71s=0 72for i in "" "-U" "-j"; do 73 newfs $i /dev/md$mdstart > /dev/null 2>&1 74 [ "$i" = "" ] && tunefs -n disable md$mdstart 75 mount /dev/md$mdstart $mntpoint 76 77 t1=`date +%s` 78 tst; s=$? 79 t2=$((`date +%s` - t1)) 80 81 umount -f $mntpoint 82 t2=$((`date +%s` - t1)) 83 echo "$t2 seconds elapsed for newfs option \"$i\"" 84 [ $t2 -gt 1000 ] && s=111 85done 86rm -f /tmp/symlink $D 87mdconfig -d -u $mdstart 88exit $s 89EOF 90#include <sys/types.h> 91#include <err.h> 92#include <errno.h> 93#include <fcntl.h> 94#include <stdio.h> 95#include <stdlib.h> 96#include <unistd.h> 97 98int 99main(int argc __unused, char **argv) 100{ 101 pid_t pid; 102 int64_t size; 103 int i, j; 104 char file[128]; 105 106 size = atol(argv[1]); 107 108 pid = getpid(); 109 for (j = 0; j < size; j++) { 110 sprintf(file,"p%05d.%05d", pid, j); 111 if (symlink("/mnt/not/there", file) == -1) { 112 if (errno != EINTR) { 113 warn("symlink(%s)", file); 114 printf("break out at %d, errno %d\n", j, 115 errno); 116 break; 117 } 118 } 119 } 120 121 for (i = --j; i >= 0; i--) { 122 sprintf(file,"p%05d.%05d", pid, i); 123 if (unlink(file) == -1) 124 err(3, "unlink(%s)", file); 125 126 } 127 128 return (0); 129} 130