Date: Sun, 17 Mar 2013 15:18:15 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r248423 - user/pho/stress2/misc Message-ID: <201303171518.r2HFIF6N042534@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
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; +}
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201303171518.r2HFIF6N042534>