xref: /freebsd/tools/test/stress2/misc/dev.sh (revision 8a272653d9fbd9fc37691c9aad6a05089b4ecb4d)
1*8a272653SPeter Holm#!/bin/sh
2*8a272653SPeter Holm
3*8a272653SPeter Holm#
4*8a272653SPeter Holm# Copyright (c) 2016 EMC Corp.
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# Test parallel read access to /dev.
30*8a272653SPeter Holm
31*8a272653SPeter Holm# "panic: Most recently used by DEVFS1" seen.
32*8a272653SPeter Holm# https://people.freebsd.org/~pho/stress/log/dev.txt
33*8a272653SPeter Holm# Fixed by r293826.
34*8a272653SPeter Holm
35*8a272653SPeter Holm[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
36*8a272653SPeter Holm
37*8a272653SPeter Holm. ../default.cfg
38*8a272653SPeter Holm
39*8a272653SPeter Holmhere=`pwd`
40*8a272653SPeter Holmcd /tmp
41*8a272653SPeter Holmsed '1,/^EOF/d' < $here/$0 > dev.c
42*8a272653SPeter Holmmycc -o dev -Wall -Wextra -O2 dev.c || exit 1
43*8a272653SPeter Holmrm -f dev.c
44*8a272653SPeter Holm
45*8a272653SPeter Holmecho "Expect: g_access(958): provider ufsid/5c581221fcac7d80 has error 6 set"
46*8a272653SPeter Holmdaemon sh -c \
47*8a272653SPeter Holm    "(cd $here/../testcases/swap; ./swap -t 6m -i 20 -k -l 100)" > \
48*8a272653SPeter Holm    /dev/null
49*8a272653SPeter Holm
50*8a272653SPeter Holm/tmp/dev	# Note: this runs as root.
51*8a272653SPeter Holms=$?
52*8a272653SPeter Holm
53*8a272653SPeter Holmwhile pkill -9 swap; do
54*8a272653SPeter Holm	:
55*8a272653SPeter Holmdone
56*8a272653SPeter Holm
57*8a272653SPeter Holmrm -f /tmp/dev
58*8a272653SPeter Holmexit $s
59*8a272653SPeter HolmEOF
60*8a272653SPeter Holm#include <sys/types.h>
61*8a272653SPeter Holm#include <sys/wait.h>
62*8a272653SPeter Holm
63*8a272653SPeter Holm#include <err.h>
64*8a272653SPeter Holm#include <errno.h>
65*8a272653SPeter Holm#include <fcntl.h>
66*8a272653SPeter Holm#include <fts.h>
67*8a272653SPeter Holm#include <stdlib.h>
68*8a272653SPeter Holm#include <stdio.h>
69*8a272653SPeter Holm#include <string.h>
70*8a272653SPeter Holm#include <time.h>
71*8a272653SPeter Holm#include <unistd.h>
72*8a272653SPeter Holm
73*8a272653SPeter Holm#define PARALLEL 4
74*8a272653SPeter Holm#define RUNTIME 300
75*8a272653SPeter Holm
76*8a272653SPeter Holmchar path[80];
77*8a272653SPeter Holm
78*8a272653SPeter Holmvoid
79*8a272653SPeter Holmchurn(char *path)
80*8a272653SPeter Holm{
81*8a272653SPeter Holm	FTS *fts;
82*8a272653SPeter Holm	FTSENT *p;
83*8a272653SPeter Holm	time_t start;
84*8a272653SPeter Holm	int fd, ftsoptions;
85*8a272653SPeter Holm	char *args[2];
86*8a272653SPeter Holm
87*8a272653SPeter Holm	ftsoptions = FTS_PHYSICAL;
88*8a272653SPeter Holm	args[0] = path;
89*8a272653SPeter Holm	args[1] = 0;
90*8a272653SPeter Holm
91*8a272653SPeter Holm	start = time(NULL);
92*8a272653SPeter Holm	while (time(NULL) - start < RUNTIME) {
93*8a272653SPeter Holm		if ((fts = fts_open(args, ftsoptions, NULL)) == NULL)
94*8a272653SPeter Holm			err(1, "fts_open");
95*8a272653SPeter Holm
96*8a272653SPeter Holm		while ((p = fts_read(fts)) != NULL) {
97*8a272653SPeter Holm			if (p->fts_info == FTS_D ||
98*8a272653SPeter Holm			   p->fts_info == FTS_DP)
99*8a272653SPeter Holm				continue;
100*8a272653SPeter Holm			if (strstr(p->fts_path, "ttyu") != NULL)
101*8a272653SPeter Holm				continue;
102*8a272653SPeter Holm			if (strstr(p->fts_path, "fcdm") != NULL)
103*8a272653SPeter Holm				continue;
104*8a272653SPeter Holm			if ((fd = open(p->fts_path, O_RDONLY|O_NONBLOCK)) == -1)
105*8a272653SPeter Holm				continue;
106*8a272653SPeter Holm			usleep(arc4random() % 1000);
107*8a272653SPeter Holm			close(fd);
108*8a272653SPeter Holm
109*8a272653SPeter Holm		}
110*8a272653SPeter Holm
111*8a272653SPeter Holm		if (errno != 0 && errno != ENOENT)
112*8a272653SPeter Holm			warn("fts_read");
113*8a272653SPeter Holm		if (fts_close(fts) == -1)
114*8a272653SPeter Holm			err(1, "fts_close()");
115*8a272653SPeter Holm	}
116*8a272653SPeter Holm
117*8a272653SPeter Holm	_exit(0);
118*8a272653SPeter Holm}
119*8a272653SPeter Holm
120*8a272653SPeter Holmint
121*8a272653SPeter Holmmain(void)
122*8a272653SPeter Holm{
123*8a272653SPeter Holm	int e, i, status;;
124*8a272653SPeter Holm
125*8a272653SPeter Holm	e = 0;
126*8a272653SPeter Holm	for (i = 0; i < PARALLEL; i++)
127*8a272653SPeter Holm		if (fork() == 0)
128*8a272653SPeter Holm			churn("/dev");
129*8a272653SPeter Holm
130*8a272653SPeter Holm	for (i = 0; i < PARALLEL; i++) {
131*8a272653SPeter Holm		wait(&status);
132*8a272653SPeter Holm		if (status != 0)
133*8a272653SPeter Holm			e++;
134*8a272653SPeter Holm	}
135*8a272653SPeter Holm
136*8a272653SPeter Holm	return (e);
137*8a272653SPeter Holm}
138