xref: /freebsd/tools/test/stress2/misc/vnodes.sh (revision 8a272653d9fbd9fc37691c9aad6a05089b4ecb4d)
1*8a272653SPeter Holm#!/bin/sh
2*8a272653SPeter Holm
3*8a272653SPeter Holm#
4*8a272653SPeter Holm# Copyright (c) 2012 Peter Holm <pho@FreeBSD.org>
5*8a272653SPeter Holm# All rights reserved.
6*8a272653SPeter Holm#
7*8a272653SPeter Holm# Redistribution and use in source and binary forms, with or without
8*8a272653SPeter Holm# modification, are permitted provided that the following conditions
9*8a272653SPeter Holm# are met:
10*8a272653SPeter Holm# 1. Redistributions of source code must retain the above copyright
11*8a272653SPeter Holm#    notice, this list of conditions and the following disclaimer.
12*8a272653SPeter Holm# 2. Redistributions in binary form must reproduce the above copyright
13*8a272653SPeter Holm#    notice, this list of conditions and the following disclaimer in the
14*8a272653SPeter Holm#    documentation and/or other materials provided with the distribution.
15*8a272653SPeter Holm#
16*8a272653SPeter Holm# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17*8a272653SPeter Holm# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18*8a272653SPeter Holm# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19*8a272653SPeter Holm# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20*8a272653SPeter Holm# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21*8a272653SPeter Holm# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22*8a272653SPeter Holm# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23*8a272653SPeter Holm# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24*8a272653SPeter Holm# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25*8a272653SPeter Holm# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26*8a272653SPeter Holm# SUCH DAMAGE.
27*8a272653SPeter Holm#
28*8a272653SPeter Holm
29*8a272653SPeter Holm# Demonstrate vnode leak
30*8a272653SPeter Holm
31*8a272653SPeter Holm# Test scenario by Petr Salinger <Petr Salinger seznam cz>
32*8a272653SPeter Holm
33*8a272653SPeter Holm. ../default.cfg
34*8a272653SPeter Holm
35*8a272653SPeter Holmkldstat -v | grep -q pty || { kldload pty || exit 0; }
36*8a272653SPeter Holmhere=`pwd`
37*8a272653SPeter Holmcd /tmp
38*8a272653SPeter Holmsed '1,/^EOF/d' < $here/$0 > vnodes.c
39*8a272653SPeter Holmmycc -o vnodes -Wall -Wextra -O2 vnodes.c || exit 1
40*8a272653SPeter Holmrm -f vnodes.c
41*8a272653SPeter Holm
42*8a272653SPeter Holms=0
43*8a272653SPeter Holmold=`sysctl -n vfs.numvnodes`
44*8a272653SPeter Holm/tmp/vnodes
45*8a272653SPeter Holmnew=`sysctl -n vfs.numvnodes`
46*8a272653SPeter Holm[ $((new - old)) -gt 100 ] && { s=1; echo "FAIL vnode leak"; }
47*8a272653SPeter Holm
48*8a272653SPeter Holmrm -f /tmp/vnodes
49*8a272653SPeter Holmexit $s
50*8a272653SPeter HolmEOF
51*8a272653SPeter Holm#include <sys/types.h>
52*8a272653SPeter Holm#include <sys/wait.h>
53*8a272653SPeter Holm#include <err.h>
54*8a272653SPeter Holm#include <errno.h>
55*8a272653SPeter Holm#include <fcntl.h>
56*8a272653SPeter Holm#include <stdio.h>
57*8a272653SPeter Holm#include <stdlib.h>
58*8a272653SPeter Holm#include <unistd.h>
59*8a272653SPeter Holm
60*8a272653SPeter Holmchar dname[]= "/dev/ptyrX";
61*8a272653SPeter Holm
62*8a272653SPeter Holmvoid leak(void)
63*8a272653SPeter Holm{
64*8a272653SPeter Holm	int i, fd;
65*8a272653SPeter Holm
66*8a272653SPeter Holm	if (fork() == 0) {
67*8a272653SPeter Holm		for (i = '0'; i < '9'; i ++) {
68*8a272653SPeter Holm			dname[9] = i;
69*8a272653SPeter Holm			fd = open(dname, O_RDWR);
70*8a272653SPeter Holm			if (fd == -1)
71*8a272653SPeter Holm				if (errno != EBUSY && errno != ENXIO)
72*8a272653SPeter Holm					err(1, "open(%s)", dname);
73*8a272653SPeter Holm		}
74*8a272653SPeter Holm		_exit(0);
75*8a272653SPeter Holm	}
76*8a272653SPeter Holm	wait(NULL);
77*8a272653SPeter Holm}
78*8a272653SPeter Holm
79*8a272653SPeter Holmint main(void)
80*8a272653SPeter Holm{
81*8a272653SPeter Holm	int i;
82*8a272653SPeter Holm
83*8a272653SPeter Holm	for (i = 0 ;i < 100000; i++) {
84*8a272653SPeter Holm		leak();
85*8a272653SPeter Holm	}
86*8a272653SPeter Holm	return (0);
87*8a272653SPeter Holm}
88