1#!/bin/sh
2
3#
4# Copyright (c) 2013 EMC Corp.
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# No problems seen with SU. Panics with SU+J, just like suj30.sh
30
31# Triggers "known LOR in SU code" when crossmp8.sh is run first:
32# https://people.freebsd.org/~pho/stress/log/rename12.txt.
33
34[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
35
36. ../default.cfg
37
38here=`pwd`
39cd /tmp
40sed '1,/^EOF/d' < $here/$0 > rename12.c
41mycc -o rename12 -Wall -Wextra rename12.c || exit 1
42rm -f rename12.c
43
44mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
45mdconfig -l | grep -q md$mdstart &&  mdconfig -d -u $mdstart
46
47mdconfig -a -t swap -s 4g -u $mdstart || exit 1
48newfs $newfs_flags md$mdstart > /dev/null
49mount /dev/md$mdstart $mntpoint
50
51inodes=`df -i $mntpoint | tail -1 | awk '{print $7}'`
52loops=4
53parallel=12
54timeout=1200
55start=`date '+%s'`
56for i in `jot $loops`; do
57	for j in `jot $parallel`; do
58		mkdir -p $mntpoint/d$j/dir1
59		mkdir -p $mntpoint/d$j/dir2
60		(cd $mntpoint/d$j; /tmp/rename12 $((inodes/parallel)) ) &
61	done
62	wait
63	for j in `jot $parallel`; do
64		rmdir  $mntpoint/d$j/dir1
65		rmdir  $mntpoint/d$j/dir2
66	done
67	[ $((`date '+%s'` - start)) -lt $timeout ] && break
68done
69
70while mount | grep "on $mntpoint " | grep -q /dev/md; do
71	umount $mntpoint || sleep 1
72done
73
74checkfs /dev/md$mdstart; s=$?
75mdconfig -d -u $mdstart
76rm -rf /tmp/rename12
77exit $s
78EOF
79#include <sys/stat.h>
80#include <sys/types.h>
81#include <sys/wait.h>
82
83#include <err.h>
84#include <errno.h>
85#include <fcntl.h>
86#include <libgen.h>
87#include <stdio.h>
88#include <stdlib.h>
89#include <string.h>
90#include <unistd.h>
91
92pid_t crpid;
93long n;
94int mvpipe[2], rmpipe[2];
95
96void
97cr(void)
98{
99	pid_t pid;
100	int i;
101	char name[80];
102
103	setproctitle("cr");
104	pid = getpid();
105	usleep(arc4random() & 1000);
106	for (i = 0; i < n; i++) {
107		snprintf(name, sizeof(name), "dir1/d.%06d.%06d", pid, i);
108		if (mkdir(name, 0700) == -1)
109			err(1, "mkdir(%s). %s:%d", name, __FILE__, __LINE__);
110		if (write(mvpipe[1], &i, sizeof(i)) != sizeof(i))
111			err(1, "write mvpipe");
112	}
113
114	_exit(0);
115}
116
117void
118mv(void)
119{
120	pid_t pid;
121	int i;
122	char name[80], to[80];
123
124	setproctitle("mv");
125	pid = crpid;
126	i = 0;
127	while (i != n - 1 &&
128		    read(mvpipe[0], &i, sizeof(i)) == sizeof(i)) {
129		snprintf(name, sizeof(name), "dir1/d.%06d.%06d", pid, i);
130		snprintf(to  , sizeof(to  ), "dir2/d.%06d.%06d", pid, i);
131		if (rename(name, to) == -1)
132			warn("rename(%s, %s)", name, to);
133		if (write(rmpipe[1], &i, sizeof(i)) != sizeof(i))
134			err(1, "write rmpipe");
135	}
136	_exit(0);
137}
138
139void
140rm(void)
141{
142	pid_t pid;
143	int i;
144	char to[80];
145
146	setproctitle("rm");
147	pid = crpid;
148	i = 0;
149	while (i != n - 1 &&
150		    read(rmpipe[0], &i, sizeof(i)) == sizeof(i)) {
151		snprintf(to, sizeof(to  ), "dir2/d.%06d.%06d", pid, i);
152		if (rmdir(to) == -1)
153			warn("rmdir(%s)", to);
154	}
155	_exit(0);
156}
157
158int
159main(int argc, char **argv)
160{
161	int r, s;
162
163	if (argc != 2)
164		errx(1, "Usage %s <num inodes>", argv[0]);
165	n = atol(argv[1]);
166	if (n > 32765) {
167		n = 32765 - 1;
168	}
169
170	if (pipe(mvpipe) == -1)
171		err(1, "pipe()");
172	if (pipe(rmpipe) == -1)
173		err(1, "pipe()");
174
175	r = 0;
176	if ((crpid = fork()) == 0)
177		cr();
178	if (fork() == 0)
179		mv();
180	if (fork() == 0)
181		rm();
182
183	wait(&s);
184	r += WEXITSTATUS(s);
185	wait(&s);
186	r += WEXITSTATUS(s);
187	wait(&s);
188	r += WEXITSTATUS(s);
189
190	return (r);
191}
192