xref: /freebsd/tools/test/stress2/misc/mmap4.sh (revision 95ee2897e98f5d444f26ed2334cc7c439f9c16c6)
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