svn commit: r248423 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Sun Mar 17 15:18:15 2013
New Revision: 248423
URL: http://svnweb.freebsd.org/changeset/base/248423

Log:
  Added new negative name cache regression test.

Added:
  user/pho/stress2/misc/namecache2.sh   (contents, props changed)

Added: user/pho/stress2/misc/namecache2.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/namecache2.sh	Sun Mar 17 15:18:15 2013	(r248423)
@@ -0,0 +1,185 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2013 Peter Holm
+# 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.
+#
+# $FreeBSD$
+#
+
+# UFS cache inconsistancy for rename(2) demonstrated
+# Fails with:
+#    ls -ali /mnt
+#    ls: tfa1022: No such file or directory
+# Fixed by r248422
+
+# Test scenario obtained from Rick Miller <vmiller at hostileadmin com>
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+. ../default.cfg
+
+odir=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $odir/$0 > namecache2.c
+rm -f /tmp/namecache2
+cc -o namecache2 -Wall -Wextra -g -O2 namecache2.c -lpthread || exit 1
+rm -f namecache2.c
+cd $odir
+
+mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
+mdconfig -l | grep -q md$mdstart &&  mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 1g -u $mdstart
+bsdlabel -w md$mdstart auto
+newfs -U md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint
+
+(cd $mntpoint; /tmp/namecache2)
+
+f=`(cd $mntpoint; echo *)`
+if [ "$f" != '*' ]; then
+	echo FAIL
+	echo "echo $mntpoint/*"
+	echo $mntpoint/*
+	 echo ""
+	echo "ls -ali $mntpoint"
+	ls -ali $mntpoint
+	echo ""
+	echo "fsdb -r /dev/md${mdstart}$part"
+	fsdb -r /dev/md${mdstart}$part <<-EF
+	ls
+	quit
+	EF
+fi
+
+while mount | grep $mntpoint | grep -q /dev/md; do
+	umount $mntpoint || sleep 1
+done
+mdconfig -d -u $mdstart
+rm -f /tmp/namecache2
+exit 0
+EOF
+/*
+ * NOTE: This must be run with the current working directory on a local UFS
+ * disk partition, to demonstrate a FreeBSD namecache bug. I have never seen
+ * this bug happen with an NFS partition.
+ */
+
+#include <pthread.h>
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <time.h>
+
+int stopping = false;
+char *pFilename = 0;
+
+static void    *
+statThread(void *arg __unused)
+{
+
+	struct stat statData;
+	int rc;
+
+	for (;;) {
+		while (pFilename == 0) {
+			if (stopping)
+				return 0;
+		}
+
+		rc = stat(pFilename, &statData);
+		if (rc < 0 && errno != ENOENT) {
+			printf(" statThread stat() on %s failed with errno %d\n",
+			       pFilename, errno);
+			return 0;
+		}
+	}
+
+	return 0;
+}
+
+int 
+main(void)
+{
+	char filename1 [20], filename2[20], filename3[20];
+	pthread_t threadId;
+	struct stat statData;
+	int result, fd;
+	unsigned int number;
+	struct timespec	period;
+
+	sprintf(filename1, "tfa0");
+	fd = open(filename1, O_CREAT, S_IRWXU);
+	if (fd < 0) {
+		printf("open(O_CREAT) on %s failed with errno %d\n", filename1, errno);
+		return 0;
+	}
+	if (close(fd) < 0) {
+		printf("close() on %s failed with errno %d\n", filename1, errno);
+		return 0;
+	}
+	result = pthread_create(&threadId, NULL, statThread, NULL);
+	if (result < 0)
+		err(1, "pthread_create(): %s\n", strerror(result));
+
+	for (number = 0; number < 0x001FFFFF; number += 2) {
+		sprintf(filename1, "tfa%u", number);
+		sprintf(filename2, "tfa%u", number + 1);
+		sprintf(filename3, "tfa%u", number + 2);
+		if (rename(filename1, filename2) < 0) {
+			printf(" rename1() from %s to %s failed with errno %d\n",
+			       filename1, filename2, errno);
+			return 0;
+		}
+		pFilename = filename3;
+
+		if (rename(filename2, filename3) < 0) {
+			printf(" rename2() from %s to %s failed with errno %d\n",
+			       filename2, filename3, errno);
+			return 0;
+		}
+		pFilename = 0;
+		period.tv_sec = 0;
+		period.tv_nsec = 500;
+		nanosleep(&period, 0);
+
+		if (stat(filename3, &statData) < 0) {
+			printf("stat(%s) failed with errno %d\n", filename3, errno);
+			stopping = true;
+			period.tv_sec = 0;
+			period.tv_nsec = 500;
+			nanosleep(&period, 0);
+			return 0;
+		}
+	}
+	unlink(filename3);
+
+	return 0;
+}