xref: /freebsd/tools/test/stress2/misc/rename6.sh (revision ec0ea6efa1ad229d75c394c1a9b9cac33af2b1d3)
1#!/bin/sh
2
3#
4# Copyright (c) 2011 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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
30
31# Demonstrate rename(2) cache problem, where the original name lingers in the VFS cache.
32
33# Original test scenario by Anton Yuzhaninov <citrin citrin ru>
34
35. ../default.cfg
36
37here=`pwd`
38cd /tmp
39sed '1,/^EOF/d' < $here/$0 > rename6.c
40mycc -o rename6 -Wall -Wextra -O2 rename6.c
41rm -f rename6.c
42cd $here
43
44mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
45mdconfig -l | grep -q md$mdstart &&  mdconfig -d -u $mdstart
46mdconfig -a -t swap -s 2g -u $mdstart
47bsdlabel -w md$mdstart auto
48newfs $newfs_flags md${mdstart}$part > /dev/null
49mount /dev/md${mdstart}$part $mntpoint
50chmod 777 $mntpoint
51
52su $testuser -c "cd $mntpoint; /tmp/rename6"
53
54while mount | grep -q md${mdstart}$part; do
55	umount $mntpoint || sleep 1
56done
57mdconfig -d -u $mdstart
58rm -f /tmp/rename6
59exit
60EOF
61#include <err.h>
62#include <errno.h>
63#include <fcntl.h>
64#include <sched.h>
65#include <signal.h>
66#include <stdio.h>
67#include <stdlib.h>
68#include <strings.h>
69#include <sys/param.h>
70#include <sys/stat.h>
71#include <sys/time.h>
72#include <sys/wait.h>
73#include <time.h>
74#include <unistd.h>
75
76pid_t spid;
77const char *logfile = "test.log";
78
79void
80cleanup()
81{
82	if (kill(spid, SIGINT) == -1 && errno != ESRCH)
83		err(1, "kill(%d)", spid);
84}
85
86static void
87Stat()
88{
89	struct stat sb;
90	int i;
91
92	setproctitle("Stat");
93	for (;;) {
94		for (i = 0; i < 1000; i++) {
95			stat(logfile, &sb);
96		}
97		usleep(1000);
98	}
99}
100
101int
102main(void)
103{
104	struct stat sb1, sb2;
105	int fd, i;
106	char new[128];
107
108	if ((spid = fork()) == 0)
109		Stat();
110
111	setproctitle("main");
112	atexit(cleanup);
113	for (i = 0; i < 20000; i++) {
114		sprintf(new, "test.log.%05d", i);
115		if ((fd = open(logfile, O_RDWR | O_CREAT | O_TRUNC, 0644)) == -1)
116			err(1, "creat(%s)", logfile);
117		close(fd);
118#if 1
119		if (rename(logfile, new) == -1)
120			warn("rename(%s, %s)", logfile, new);
121#else
122		/* No cache problem is seen */
123		if (link(logfile, new) == -1)
124			err(1, "link(%s, %s)", logfile, new);
125		if (unlink(logfile) == -1)
126			err(1, "unlink(%s)", logfile);
127#endif
128		/*
129		 * stat() for logfile and new will be identical sometimes,
130		 * but only when Stat() is running.
131		 */
132		if (stat(logfile, &sb1) == 0 && stat(new, &sb2) == 0 &&
133		    bcmp(&sb1, &sb2, sizeof(sb1)) == 0) {
134			fprintf(stderr, "At loop #%d\n", i);
135			fprintf(stderr, "%-15s: ino = %ju, nlink = %ju,"
136			   " size = %jd\n", logfile, (uintmax_t)sb1.st_ino,
137			   (uintmax_t)sb1.st_nlink, sb1.st_blocks);
138			fprintf(stderr, "%-15s: ino = %ju, nlink = %ju, "
139			    "size = %jd\n", new    , (uintmax_t)sb2.st_ino,
140			    (uintmax_t)sb2.st_nlink, sb2.st_blocks);
141		}
142		unlink(new);
143	}
144
145	kill(spid, SIGINT);
146	wait(NULL);
147
148	return (0);
149}
150