Date: Sat, 13 Feb 2010 11:33:14 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r203821 - projects/stress2/misc Message-ID: <201002131133.o1DBXEcW007262@svn.freebsd.org>
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Author: pho Date: Sat Feb 13 11:33:14 2010 New Revision: 203821 URL: http://svn.freebsd.org/changeset/base/203821 Log: Scenario used to verify fix in r203818, where a missing clear of a bp pointer could cause a panic. Added: projects/stress2/misc/fragments.sh (contents, props changed) Added: projects/stress2/misc/fragments.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ projects/stress2/misc/fragments.sh Sat Feb 13 11:33:14 2010 (r203821) @@ -0,0 +1,266 @@ +#!/bin/sh + +# +# Copyright (c) 2010 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. +# +# $FreeBSD$ +# + +# Scenario that causes "panic: brelse: free buffer onto another queue???" +# Idea for scenario by kib@. Fixed in r203818 + +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg +here=`pwd` + +cd /tmp +sed '1,/^EOF/d' < $here/$0 > fragments.c +rm -f /tmp/fragments +cc -o fragments -Wall -Wextra -O2 -g fragments.c +rm -f fragments.c +cd $here + +mount | grep "$mntpoint" | grep -q md$mdstart && 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 -m 0 md${mdstart}${part} > /dev/null 2>&1 +mount /dev/md${mdstart}${part} /mnt +chmod 777 /mnt + +cd /mnt +su ${testuser} -c "/tmp/fragments" +cd $here + +umount /mnt +mount | grep "$mntpoint" | grep -q md$mdstart && umount -f ${mntpoint} +mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart + +rm -f /tmp/fragments +exit +EOF +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/mount.h> +#include <sys/param.h> +#include <sys/stat.h> +#include <sys/wait.h> +#include <unistd.h> + +#define LOOPS 50000 +#define PARALLEL 8 + +static pid_t pid; +static char *buf; + +void +cleanup(int n) +{ + int i, j, start; + int nb = 0; + char file[128]; + struct statfs sbuf; + struct stat sb; + + if (n == -1) { + for (i = 0; i < LOOPS; i++) { + sprintf(file,"t%05d", i); + unlink(file); + } + return; + } + + start = arc4random() % n; + for (i = 0; i < LOOPS; i++) { + j = (start + i) % LOOPS; + sprintf(file,"t%05d", j); + if (stat(file, &sb) != 0) + continue; + + if (sb.st_size == 0) { + unlink(file); + continue; + } + if (truncate(file, 0) == 0) { + nb++; + continue; + } + if (nb > 10) + break; + } + + + for (i = 0; i < 10; i++) { + if (statfs(".", &sbuf) < 0) + err(1, "statfs(%s)", "."); + + if (sbuf.f_bfree > 8) + return; + } + + for (i = 0; i < LOOPS; i++) { + j = (start + i) % LOOPS; + sprintf(file,"t%05d", j); + if (unlink(file) == 0) { + return; + } + } +} + +void +fragments(void) +{ + int i, len; + char file[128]; + int fd; + + for (i = 0;; i++) { + sprintf(file,"d%d/f%05d.%05d", i/1000, pid, i); + + if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, 0600)) < 0) { + if (errno != ENOSPC) + warn("open(%s)", file); + break; + } + + len = 2 * 1024; + if (write(fd, buf, len) != len) { + } + + close(fd); + } +} + +void +blocks(void) +{ + int i, len; + char file[128]; + int fd; + + for (i = 0;; i++) { + sprintf(file,"d%d/b%05d.%05d", i/1000, pid, i); + + if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, 0600)) < 0) { + if (errno != ENOSPC) + warn("open(%s)", file); + break; + } + + len = 16 * 1024; + if (write(fd, buf, len) != len) { + } + + close(fd); + } +} + +void +setup(void) +{ + int i; + char file[128]; + + for (i = 0; i < 300; i++) { + sprintf(file,"d%d", i); + if (mkdir(file, 0700) == -1) + warn("mkdir(%s)", file); + } + + blocks(); + fragments(); + + for (i = 0;i < 8; i++) { + sprintf(file,"d%d/b%05d.%05d", i/1000, pid, i); + unlink(file); + unlink(file); + } + for (i = 0;i < 1; i++) { + sprintf(file,"d%d/f%05d.%05d", i/1000, pid, i); + unlink(file); + } + +} + +int +test(void) +{ + int i, len, n; + char file[128]; + int fd; + + for (i = 0; i < LOOPS; i++) { + sprintf(file,"t%05d", i); + + if ((fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0600)) < 0) { + continue; + } +// n = arc4random() % (12 + 1); + n = 0; + len = (arc4random() % (16 * 1024) + 1) + n * 16; + while (len > 0) { + if (write(fd, buf, len) == len) + break; + len = len / 2; + usleep(1000); + } + close(fd); + if (len == 0) { + cleanup(i); + } + } + + exit(0); + + return (0); +} + +int +main() +{ + int i, j, status; + + pid = getpid(); + if ((buf = malloc(12 * 16 * 1024)) == NULL) + err(1, "malloc()"); + + setup(); + for (j = 0; j < 50; j++) { + for (i = 0; i < PARALLEL; i++) { + if (fork() == 0) + test(); + } + for (i = 0; i < PARALLEL; i++) + wait(&status); + cleanup(-1); + } + return (0); +}help
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