Date: Fri, 26 Sep 2014 06:02:35 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r272155 - user/pho/stress2/misc Message-ID: <201409260602.s8Q62Z9u056345@svn.freebsd.org>
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Author: pho Date: Fri Sep 26 06:02:35 2014 New Revision: 272155 URL: http://svnweb.freebsd.org/changeset/base/272155 Log: Added a regression test. Sponsored by: EMC / Isilon storage division Added: user/pho/stress2/misc/link.sh (contents, props changed) Added: user/pho/stress2/misc/link.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/link.sh Fri Sep 26 06:02:35 2014 (r272155) @@ -0,0 +1,194 @@ +#!/bin/sh + +# +# Copyright (c) 2014 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. +# +# $FreeBSD$ +# + +# Deadlock seen for file systems which suspend writes on unmount, such as +# UFS and tmpfs. +# http://people.freebsd.org/~pho/stress/log/link.txt +# Fixed by r272130 + +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg + +here=`pwd` +cd /tmp +sed '1,/^EOF/d' < $here/$0 > link.c +cc -o link -Wall -Wextra -O2 -g link.c || exit 1 +rm -f link.c + +mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint +[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart + +mdconfig -a -t swap -s 1g -u $mdstart || exit 1 +bsdlabel -w md$mdstart auto +newfs -U md${mdstart}$part > /dev/null +mount /dev/md${mdstart}$part $mntpoint + +daemon sh -c "(cd $here/../testcases/swap; ./swap -t 5m -i 20 -h -l 100)" \ + > /dev/null 2>&1 +/tmp/link $mntpoint > /dev/null 2>&1 & + +for i in `jot 100`; do + umount -f $mntpoint && + mount /dev/md${mdstart}$part $mntpoint + sleep .1 +done +pkill -9 link +wait + +while mount | grep $mntpoint | grep -q /dev/md; do + umount $mntpoint || sleep 1 +done +mdconfig -d -u $mdstart + +# tmpfs +mount -t tmpfs tmpfs $mntpoint + +/tmp/link $mntpoint > /dev/null 2>&1 & + +for i in `jot 100`; do + umount -f $mntpoint && + mount -t tmpfs tmpfs $mntpoint + sleep .1 +done +pkill -9 link swap +wait + +while pkill -9 swap; do + : +done > /dev/null 2>&1 +while mount | grep $mntpoint | grep -q tmpfs; do + umount $mntpoint || sleep 1 +done +rm -f /tmp/link +exit 0 +EOF +#include <sys/param.h> +#include <sys/wait.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <time.h> +#include <stdlib.h> +#include <unistd.h> + +#define PARALLEL 16 +#define RUNTIME 300 + +time_t start; +char *dir; + +void +trename(void) +{ + int fd; + char name1[MAXPATHLEN + 1]; + char name2[MAXPATHLEN + 1]; + + setproctitle(__func__); + snprintf(name1, sizeof(name1), "%s/r1.%05d", dir, getpid()); + snprintf(name2, sizeof(name2), "%s/r2.%05d", dir, getpid()); + if ((fd = open(name1, O_RDWR | O_CREAT, 0644)) == -1) + err(1, "open(%s)", name1); + close(fd); + + while (time(NULL) - start < RUNTIME) { + if (rename(name1, name2) == -1) { + if (errno == ENOENT) { + if ((fd = open(name1, O_RDWR | O_CREAT, 0644)) == -1) + err(1, "open(%s)", name1); + close(fd); + continue; + } else + warn("link(%s, %s)", name1, name2); + } + if (rename(name2, name1) == -1) + warn("link(%s, %s)", name2, name1); + } + unlink(name1); + unlink(name2); + _exit(0); +} + +void +tlink(void) +{ + int fd; + char name1[MAXPATHLEN + 1]; + char name2[MAXPATHLEN + 1]; + + setproctitle(__func__); + snprintf(name1, sizeof(name1), "%s/f1.%05d", dir, getpid()); + snprintf(name2, sizeof(name2), "%s/f2.%05d", dir, getpid()); + if ((fd = open(name1, O_RDWR | O_CREAT, 0644)) == -1) + err(1, "open(%s)", name1); + close(fd); + + while (time(NULL) - start < RUNTIME) { + unlink(name2); + if (link(name1, name2) == -1) { + if (errno == ENOENT) { + if ((fd = open(name1, O_RDWR | O_CREAT, 0644)) == -1) + err(1, "open(%s)", name1); + close(fd); + continue; + } else + warn("link(%s, %s)", name1, name2); + } + } + unlink(name1); + unlink(name2); + _exit(0); +} + +int +main(int argc, char **argv) +{ + int i, type; + + if (argc != 2) + errx(1, "Usage: %s <fill path to dir>", argv[0]); + dir = argv[1]; + type = arc4random() % 2; /* test either link() or rename() */ + + start = time(NULL); + for (i = 0; i < PARALLEL; i++) { + if (type == 0 && fork() == 0) + tlink(); + if (type == 1 && fork() == 0) + trename(); + } + for (i = 0; i < PARALLEL; i++) + wait(NULL); + + return(0); +}
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