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 $mdstart 49bsdlabel -w md$mdstart auto 50 51newfs $newfs_flags md${mdstart}$part > /dev/null 52mount /dev/md${mdstart}$part $mntpoint 53 54/tmp/mmap4 /$mntpoint/file 55 56cd $here 57rm -f /tmp/mmap4 58 59while mount | grep -q $mntpoint; do 60 sync;sync;sync 61 sleep 1 62 umount $mntpoint 63done 64 65mdconfig -d -u $mdstart 66exit 0 67EOF 68#include <sys/types.h> 69#include <err.h> 70#include <stdio.h> 71#include <stdlib.h> 72#include <unistd.h> 73#include <fcntl.h> 74#include <sys/mman.h> 75#include <sys/param.h> 76#include <string.h> 77#include <unistd.h> 78#include <errno.h> 79 80#define STARTADDR 0x0U 81#define ADRSPACE 0x06400000U /* 100 Mb */ 82 83int 84main(int argc, char **argv) 85{ 86 int fd, ps; 87 void *p; 88 size_t len; 89 volatile char *c; 90 char *path; 91 92 p = (void *)STARTADDR; 93 len = ADRSPACE; 94 95 path = argv[1]; 96 if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0622)) == -1) 97 err(1,"open()"); 98 if (ftruncate(fd, len) == -1) 99 err(1, "ftruncate"); 100 if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == 101 MAP_FAILED) { 102 if (errno == ENOMEM) 103 return (1); 104 err(1, "mmap(1)"); 105 } 106 107 c = p; 108 ps = getpagesize(); 109 for (c = p; (void *)c < p + len; c += ps) { 110 *c = 1; 111 } 112 113 close(fd); 114 115 return (0); 116} 117