svn commit: r254060 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Wed Aug  7 12:03:34 2013
New Revision: 254060
URL: http://svnweb.freebsd.org/changeset/base/254060

Log:
  Added regression test for rename(2) problem.
  
  Sponsored by:	EMC / Isilon storage division

Added:
  user/pho/stress2/misc/rename10.sh   (contents, props changed)

Added: user/pho/stress2/misc/rename10.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/rename10.sh	Wed Aug  7 12:03:34 2013	(r254060)
@@ -0,0 +1,184 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2013 EMC Corp.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+# Regression test for rename(2) problem with missing reference release of
+# a busy "to" vnode, resulting in a leak.
+# Fixed in r253998l
+
+. ../default.cfg
+
+here=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $here/$0 > rename10.c
+cc -o rename10 -Wall -Wextra -g -O2 rename10.c || exit 1
+rm -f rename10.c
+cd $here
+
+mount | grep $mntpoint | grep -q tmpfs && umount -f $mntpoint
+mount -t tmpfs tmpfs $mntpoint
+
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+mdconfig -l | grep -q md$mdstart &&  mdconfig -d -u $mdstart
+
+mdconfig -a -t swap -s 4g -u $mdstart || exit 1
+bsdlabel -w md$mdstart auto
+newfs -U md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint
+avail=`df -k $mntpoint | tail -1 | awk '{print $4}'`
+
+(cd $mntpoint; /tmp/rename10)
+
+for i in `jot 3`; do
+	sync
+	sleep 2
+done
+
+if [ `df -k $mntpoint | tail -1 | awk '{print $4}'` -lt $avail ]; then
+	echo FAIL
+	ls -ial $mntpoint
+	df -i $mntpoint
+fi
+
+n=0
+while mount | grep "on $mntpoint " | grep -q /dev/md; do
+	umount $mntpoint || sleep 1
+	n=$((n + 1))
+	[ $n -gt 5 ] && { umount -f $mntpoint; break; }
+done
+
+checkfs /dev/md${mdstart}$part
+mdconfig -d -u $mdstart
+exit 0
+EOF
+#include <err.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#define PARALLEL 4
+#define SIZE (1 * 1024 * 1024)
+
+static char *logfile = "logfile";
+static char *oldfiles[] = {
+    "logfile.0", "logfile.1", "logfile.2", "logfile.3", "logfile.4"
+};
+
+void *
+logger(void)
+{
+	int fd;
+	char * cp;
+
+	setproctitle("logger");
+	cp = calloc(1, SIZE);
+	for(;;) {
+		if ((fd = open(logfile, O_RDWR | O_APPEND)) != -1) {
+			if (write(fd, cp, SIZE) != SIZE)
+				err(1, "write()");
+			close(fd);
+		}
+		usleep(1);
+	}
+
+	_exit(0);
+}
+
+void *
+spin(void)
+{
+	int fd, i;
+
+	setproctitle("spin");
+	for(;;) {
+		for (i = 0; i < 5; i++) {
+			if ((fd = open(oldfiles[i], O_RDWR | O_APPEND)) != -1)
+				close(fd);
+		}
+		usleep(1);
+	}
+	_exit(0);
+}
+
+void 
+renamer()
+{
+	int fd, i;
+	time_t start;
+
+	setproctitle("renamer");
+	start = time(NULL);
+	i = 0;
+	while (time(NULL) - start < 60) {
+		if ((fd = open(logfile, O_RDWR | O_CREAT | O_EXCL, 0644)) == -1)
+			err(1, "creat(%s)", logfile);
+		close(fd);
+		if (rename(logfile, oldfiles[i]) == -1)
+			err(1, "rename(%s, %s)", logfile, oldfiles[i]);
+		i = (i + 1) % 5;
+	}
+	for (i = 0; i < 5; i++) {
+		unlink(oldfiles[i]);
+	}
+	unlink(logfile);
+
+}
+
+int
+main() {
+	pid_t pids[PARALLEL], spids[PARALLEL];
+	int i;
+
+	for (i = 0; i < PARALLEL; i++) {
+		if ((pids[i] = fork()) == 0)
+			logger();
+		if ((spids[i] = fork()) == 0)
+			spin();
+	}
+
+	renamer();
+
+	for (i = 0; i < PARALLEL; i++) {
+		kill(pids[i], SIGINT);
+		kill(spids[i], SIGINT);
+	}
+	for (i = 0; i < PARALLEL * 2; i++)
+		wait(NULL);
+	wait(NULL);
+		
+	return (0);
+}