Date: Mon, 14 Nov 2016 09:12:19 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r308636 - user/pho/stress2/misc Message-ID: <201611140912.uAE9CJVD093600@repo.freebsd.org>
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Author: pho Date: Mon Nov 14 09:12:19 2016 New Revision: 308636 URL: https://svnweb.freebsd.org/changeset/base/308636 Log: Added a regression test. Sponsored by: Dell EMC Isilon Added: user/pho/stress2/misc/umountf10.sh (contents, props changed) Added: user/pho/stress2/misc/umountf10.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/umountf10.sh Mon Nov 14 09:12:19 2016 (r308636) @@ -0,0 +1,135 @@ +#!/bin/sh + +# +# Copyright (c) 2016 Dell EMC Isilon +# 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. +# +# $FreeBSD$ +# + +# Demonstrate deadlock +# https://people.freebsd.org/~pho/stress/log/umountf10.txt + +# Test scenario suggestion by: kib +# Fixed in r308618. + +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 +. ../default.cfg + +cont=/tmp/umountf10.continue +dir=/tmp +odir=`pwd` +cd $dir +sed '1,/^EOF/d' < $odir/$0 > $dir/umountf10.c +mycc -o umountf10 -Wall -Wextra -O2 -g umountf10.c || exit 1 +rm -f umountf10.c +cd $odir + +mount | grep -q "on $mntpoint " && umount -f $mntpoint +[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart + +mdconfig -a -t swap -s 512m -u $mdstart +gpart create -s GPT md$mdstart > /dev/null || exit 1 +gpart add -t freebsd-ufs md$mdstart > /dev/null || exit 1 +newfs -n $newfs_flags md${mdstart}p1 > /dev/null || exit 1 +mount /dev/md${mdstart}p1 $mntpoint +touch $mntpoint/marker $cont +trap "rm -f $cont" EXIT INT + +daemon sh -c "(cd $odir/../testcases/swap; ./swap -t 4m -i 20)" > \ + /dev/null 2>&1 +sleep 5 + +for i in `jot 4`; do + /tmp/umountf10 $mntpoint & + pid="$pid $!" +done + +for i in `jot 10`; do + while [ -e $cont ]; do procstat -f $pid > /dev/null 2>&1; done & + pid2="$pid2 $!" +done + +while [ -e $cont ]; do find $mntpoint -ls > /dev/null 2>&1; done & +tpid=$! + +start=`date '+%s'` +while [ $((`date '+%s'` - start)) -lt 300 ]; do + umount -f $mntpoint 2>/dev/null && + mount /dev/md${mdstart}p1 $mntpoint +done +while pgrep -q swap; do + pkill -9 swap +done +kill $pid $pid2 $tpid +wait + +umount $mntpoint +rm -f $mntpoint/file.* +mdconfig -d -u $mdstart + +exit 0 +EOF +#include <sys/param.h> +#include <sys/stat.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +int +main(int argc, char *argv[]) +{ + int fd; + char file[MAXPATHLEN + 1]; + char marker[MAXPATHLEN + 1]; + + if (argc != 2) { + fprintf(stderr, "Usage: %s <file path>", argv[0]); + exit(1); + } + + alarm(600); + snprintf(file, sizeof(file), "%s/file.%06d", argv[1], getpid()); + snprintf(marker, sizeof(marker), "%s/marker", argv[1]); + for (;;) { + if (access(marker, R_OK) == -1) + continue; + if ((fd = open(file, O_RDWR | O_CREAT | O_APPEND, + DEFFILEMODE)) == -1) { + if (errno != ENOENT && errno != EBUSY) + warn("open(%s)", file); + continue; + } + write(fd, "a", 1); + usleep(arc4random() % 400); + close(fd); + unlink(argv[1]); + } + + return(0); +}
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