svn commit: r279322 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Thu Feb 26 14:48:28 2015
New Revision: 279322
URL: https://svnweb.freebsd.org/changeset/base/279322

Log:
  Added a regression test.
  
  Sponsored by:	 EMC / Isilon storage division

Added:
  user/pho/stress2/misc/core5.sh   (contents, props changed)

Added: user/pho/stress2/misc/core5.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/core5.sh	Thu Feb 26 14:48:28 2015	(r279322)
@@ -0,0 +1,195 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2015 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.
+#
+# $FreeBSD$
+#
+
+# The core file vnode is unreferenced before notification is sent.
+
+# Problem reported by sbruno@
+# http://people.freebsd.org/~pho/stress/log/core5.txt
+# Fixed by r279237.
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+. ../default.cfg
+
+here=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $here/$0 > core5.c
+mycc -o core5 -Wall -Wextra -O0 -g core5.c || exit 1
+rm -f core5.c
+
+cat > core5-dumper.c << EOT
+#include <sys/wait.h>
+
+#include <err.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+
+int
+main(int argc __unused, char *argv[])
+{
+	time_t start;
+	char core[80];
+
+	snprintf(core, sizeof(core), "%s.core", argv[0]);
+
+	if (unlink(core) == -1)
+		if (errno != ENOENT)
+			warn("unlink(%s)", core);
+
+	start = time(NULL);
+	while (time(NULL) - start < 600) {
+		if (fork() == 0)
+			raise(SIGSEGV);
+		wait(NULL);
+	}
+	if (unlink(core) == -1)
+		if (errno != ENOENT)
+			warn("unlink(%s)", core);
+
+	return (0);
+}
+EOT
+mycc -o core5-dumper -Wall -Wextra -O0 -g core5-dumper.c || exit 1
+rm -f core5-dumper.c
+for i in `jot 10`; do
+	cp core5-dumper core5-dumper$i
+done
+rm -f core5-dumper
+
+mount | grep -q "on $mntpoint " && umount $mntpoint
+[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
+
+mdconfig -a -t malloc -s 1g -u $mdstart
+bsdlabel -w md${mdstart} auto
+
+newfs -b 4096 -f 512 -i 2048 md${mdstart}$part > /dev/null
+mount -o async /dev/md${mdstart}$part $mntpoint || exit 1
+
+cp /tmp/core5 $mntpoint
+mkdir $mntpoint/dir
+cd $mntpoint
+
+mp2=${mntpoint}2
+[ -d $mp2 ] || mkdir $mp2
+mount | grep -q "on $mp2 " && umount $mp2
+mount -t tmpfs tmpfs $mp2 || exit 1
+for i in `jot 10`; do
+	(cd $mp2; /tmp/core5-dumper$i ) &
+done
+$mntpoint/core5 $mntpoint/dir
+wait
+umount $mp2
+
+cd $here
+while mount | grep -q "on $mntpoint "; do
+        umount $mntpoint || sleep 1
+done
+mdconfig -d -u $mdstart
+rm -f /tmp/core5 /tmp/core5-dumper* /tmp/core5-dumper*.core
+exit 0
+EOF
+#include <sys/wait.h>
+#include <sys/sysctl.h>
+
+#include <err.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+#define MAXVNODES 1000
+#define NBFILES 10000
+#define PARALLEL 4
+#define RTIME (10 * 60)
+
+char *path;
+
+void
+test(int n)
+{
+	int fd, i;
+	char file[80];
+
+	usleep(arc4random() % 1000);
+	for (i = 0; i < NBFILES; i++) {
+		snprintf(file, sizeof(file), "%s/f%d.%06d", path, n, i);
+		if ((fd = open(file, O_CREAT, 0644)) == -1) {
+			warn("open(%s)", file);
+			break;
+		}
+		close(fd);
+	}
+	for (i = 0; i < NBFILES; i++) {
+		snprintf(file, sizeof(file), "%s/f%d.%06d", path, n, i);
+		if (unlink(file) == -1)
+			err(1, "unlink(%s)", file);
+	}
+
+	_exit(0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	size_t len;
+	time_t start;
+	int j, maxvnodes, nv;
+
+	if (argc != 2)
+		errx(1, "Usage: %s <path>", argv[0]);
+	path = argv[1];
+
+	nv = MAXVNODES;
+	len = sizeof(maxvnodes);
+	if (sysctlbyname("kern.maxvnodes", &maxvnodes, &len, &nv,
+	    sizeof(nv)) != 0)
+		err(1, "sysctl kern.maxvnodes 1");
+
+	start = time(NULL);
+	while (time(NULL) - start < RTIME) {
+		for (j = 0; j < PARALLEL; j++)
+			if (fork() == 0)
+				test(j);
+
+		for (j = 0; j < PARALLEL; j++)
+			wait(NULL);
+	}
+
+	if (sysctlbyname("kern.maxvnodes", NULL, NULL, &maxvnodes,
+	    sizeof(maxvnodes)) != 0)
+		err(1, "sysctl kern.maxvnodes 2");
+
+	return (0);
+}