1#!/bin/sh 2 3# 4# Copyright (c) 2010 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# Test overcommit of the file system capacity 30# Causes panic: 1 vncache entries remaining 31# Fixed in r202529 32 33# Scenario by kib@ 34 35[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 36 37. ../default.cfg 38 39here=`pwd` 40cd /tmp 41sed '1,/^EOF/d' < $here/$0 > mmap4.c 42mycc -o mmap4 -Wall -O2 mmap4.c 43rm -f mmap4.c 44 45mount | grep -q "$mntpoint" && umount $mntpoint 46mdconfig -l | grep -q $mdstart && mdconfig -d -u $mdstart 47 48mdconfig -a -t swap -s 40m -u $mdstart 49 50newfs $newfs_flags md$mdstart > /dev/null 51mount /dev/md$mdstart $mntpoint 52 53/tmp/mmap4 /$mntpoint/file 54 55cd $here 56rm -f /tmp/mmap4 57 58while mount | grep -q $mntpoint; do 59 sync;sync;sync 60 sleep 1 61 umount $mntpoint 62done 63 64mdconfig -d -u $mdstart 65exit 0 66EOF 67#include <sys/types.h> 68#include <err.h> 69#include <stdio.h> 70#include <stdlib.h> 71#include <unistd.h> 72#include <fcntl.h> 73#include <sys/mman.h> 74#include <sys/param.h> 75#include <string.h> 76#include <unistd.h> 77#include <errno.h> 78 79#define STARTADDR 0x0U 80#define ADRSPACE 0x06400000U /* 100 Mb */ 81 82int 83main(int argc, char **argv) 84{ 85 int fd, ps; 86 void *p; 87 size_t len; 88 volatile char *c; 89 char *path; 90 91 p = (void *)STARTADDR; 92 len = ADRSPACE; 93 94 path = argv[1]; 95 if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0622)) == -1) 96 err(1,"open()"); 97 if (ftruncate(fd, len) == -1) 98 err(1, "ftruncate"); 99 if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == 100 MAP_FAILED) { 101 if (errno == ENOMEM) 102 return (1); 103 err(1, "mmap(1)"); 104 } 105 106 c = p; 107 ps = getpagesize(); 108 for (c = p; (void *)c < p + len; c += ps) { 109 *c = 1; 110 } 111 112 close(fd); 113 114 return (0); 115} 116