Date: Tue, 1 Nov 2011 17:18:57 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r226999 - projects/stress2/misc Message-ID: <201111011718.pA1HIvMW076471@svn.freebsd.org>
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Author: pho Date: Tue Nov 1 17:18:57 2011 New Revision: 226999 URL: http://svn.freebsd.org/changeset/base/226999 Log: Added regression test for rename() cache problem, fixed in r226967. Added: projects/stress2/misc/rename6.sh (contents, props changed) Added: projects/stress2/misc/rename6.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ projects/stress2/misc/rename6.sh Tue Nov 1 17:18:57 2011 (r226999) @@ -0,0 +1,148 @@ +#!/bin/sh + +# +# Copyright (c) 2011 Peter Holm <pho@FreeBSD.org> +# 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 + +# Demonstrate rename(2) cache problem, where the original name lingers in the VFS cache. + +# Original test scenario by Anton Yuzhaninov <citrin citrin ru> + +. ../default.cfg + +here=`pwd` +cd /tmp +sed '1,/^EOF/d' < $here/$0 > rename6.c +cc -o rename6 -Wall -Wextra -O2 rename6.c +rm -f rename6.c +cd $here + +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 2g -u $mdstart +bsdlabel -w md$mdstart auto +newfs -U md${mdstart}$part > /dev/null +mount /dev/md${mdstart}$part $mntpoint +chmod 777 $mntpoint + +su ${testuser} -c "cd $mntpoint; /tmp/rename6" + +while mount | grep -q md${mdstart}$part; do + umount $mntpoint || sleep 1 +done +mdconfig -d -u $mdstart +rm -f /tmp/rename6 +exit +EOF +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <sched.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <strings.h> +#include <sys/param.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <sys/wait.h> +#include <time.h> +#include <unistd.h> + +pid_t spid; +const char *logfile = "test.log"; + +void +cleanup() +{ + kill(spid, SIGINT); +} + +static void +Stat() +{ + struct stat sb; + int i; + + setproctitle("Stat"); + for (;;) { + for (i = 0; i < 1000; i++) { + stat(logfile, &sb); + } + usleep(1000); + } +} + +int +main(void) +{ + struct stat sb1, sb2; + int fd, i; + char new[128]; + + if ((spid = fork()) == 0) + Stat(); + + setproctitle("main"); + atexit(cleanup); + for (i = 0; i < 20000; i++) { + sprintf(new, "test.log.%05d", i); + if ((fd = open(logfile, O_RDWR | O_CREAT | O_TRUNC, 0644)) == -1) + err(1, "creat(%s)", logfile); + close(fd); +#if 1 + if (rename(logfile, new) == -1) + warn("rename(%s, %s)", logfile, new); +#else + /* No cache problem is seen */ + if (link(logfile, new) == -1) + err(1, "link(%s, %s)", logfile, new); + if (unlink(logfile) == -1) + err(1, "unlink(%s)", logfile); +#endif + /* + * stat() for logfile and new will be identical sometimes, + * but only when Stat() is running. + */ + if (stat(logfile, &sb1) == 0 && stat(new, &sb2) == 0 && + bcmp(&sb1, &sb2, sizeof(sb1)) == 0) { + fprintf(stderr, "At loop #%d\n", i); + fprintf(stderr, "%-15s: ino = %d, nlink = %d, size = %jd\n", + logfile, sb1.st_ino, sb1.st_nlink, sb1.st_blocks); + fprintf(stderr, "%-15s: ino = %d, nlink = %d, size = %jd\n", + new , sb2.st_ino, sb2.st_nlink, sb2.st_blocks); + } + unlink(new); + } + + kill(spid, SIGINT); + wait(NULL); + + return (0); +}
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