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 mount /dev/md$mdstart $mntpoint 75 76 t1=`date +%s` 77 tst; s=$? 78 t2=$((`date +%s` - t1)) 79 80 umount -f $mntpoint 81 t2=$((`date +%s` - t1)) 82 echo "$t2 seconds elapsed for newfs option \"$i\"" 83 [ $t2 -gt 1000 ] && s=111 84done 85rm -f /tmp/symlink $D 86mdconfig -d -u $mdstart 87exit $s 88EOF 89#include <sys/types.h> 90#include <err.h> 91#include <errno.h> 92#include <fcntl.h> 93#include <stdio.h> 94#include <stdlib.h> 95#include <unistd.h> 96 97int 98main(int argc __unused, char **argv) 99{ 100 pid_t pid; 101 int64_t size; 102 int i, j; 103 char file[128]; 104 105 size = atol(argv[1]); 106 107 pid = getpid(); 108 for (j = 0; j < size; j++) { 109 sprintf(file,"p%05d.%05d", pid, j); 110 if (symlink("/mnt/not/there", file) == -1) { 111 if (errno != EINTR) { 112 warn("symlink(%s)", file); 113 printf("break out at %d, errno %d\n", j, 114 errno); 115 break; 116 } 117 } 118 } 119 120 for (i = --j; i >= 0; i--) { 121 sprintf(file,"p%05d.%05d", pid, i); 122 if (unlink(file) == -1) 123 err(3, "unlink(%s)", file); 124 125 } 126 127 return (0); 128} 129