Date: Mon, 23 Oct 2017 11:12:10 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r324919 - user/pho/stress2/misc Message-ID: <201710231112.v9NBCAKq011522@repo.freebsd.org>
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Author: pho Date: Mon Oct 23 11:12:09 2017 New Revision: 324919 URL: https://svnweb.freebsd.org/changeset/base/324919 Log: Added a regression test. Reported by: Dmitry Vyukov <dvyukov@google.com> Sponsored by: Dell EMC Isilon Added: user/pho/stress2/misc/mknod.sh (contents, props changed) Added: user/pho/stress2/misc/mknod.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/mknod.sh Mon Oct 23 11:12:09 2017 (r324919) @@ -0,0 +1,165 @@ +#!/bin/sh + +# +# Copyright (c) 2017 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. +# +# $FreeBSD$ +# + +# mknod(2) regression test +# "panic: ffs_write: type 0xca2b02d0 8 (0,3)" seen. +# Reported by: Dmitry Vyukov <dvyukov@google.com> +# Fixed by r324853 + +. ../default.cfg +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +dir=/tmp +odir=`pwd` +cd $dir +sed '1,/^EOF/d' < $odir/$0 > $dir/mknod.c +mycc -o mknod -Wall -Wextra -O0 -g mknod.c || exit 1 +rm -f mknod.c +cd $odir + +set -e +mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint +[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart +mdconfig -a -t swap -s 2g -u $mdstart +bsdlabel -w md$mdstart auto +newfs $newfs_flags md${mdstart}$part > /dev/null +mount /dev/md${mdstart}$part $mntpoint +set +e + +cd $mntpoint +$dir/mknod $mntpoint +s=$? +[ -f mknod.core -a $s -eq 0 ] && + { ls -l mknod.core; mv mknod.core /tmp; s=1; } +cd $odir + +for i in `jot 6`; do + mount | grep -q "on $mntpoint " || break + umount $mntpoint && break || sleep 10 +done +[ $i -eq 6 ] && exit 1 +mdconfig -d -u $mdstart +rm -rf $dir/mknod +exit $s + +EOF +#include <sys/param.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <sys/wait.h> + +#include <machine/atomic.h> + +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <time.h> +#include <unistd.h> + +static volatile u_int *share; +static char *mp; + +#define PARALLEL 4 +#define RUNTIME (1 * 60) +#define SYNC 0 + +static void +test(void) +{ + dev_t dev; + mode_t mode; + time_t start; + int fd, n, r; + char path[128]; + + atomic_add_int(&share[SYNC], 1); + while (share[SYNC] != PARALLEL) + ; + n = 0; + snprintf(path, sizeof(path), "%s/node.%06d.%d", mp, getpid(), n); + start = time(NULL); + while ((time(NULL) - start) < RUNTIME) { + dev = makedev(arc4random(), arc4random()); + mode = arc4random() % 0x10000; + r = mknod(path, mode, dev); + if (r == 0) { + if ((fd = open(path, O_RDWR)) != -1) { + write(fd, "x", 1); + close(fd); + } + unlink(path); + n++; + snprintf(path, sizeof(path), "%s/node.%06d.%d", mp, + getpid(), n); + } + } + + _exit(0); +} + +int +main(int argc, char *argv[]) +{ + pid_t pids[PARALLEL]; + size_t len; + int e, i, status; + + if (argc != 2) + return (1); + mp = argv[1]; + e = 0; + len = PAGE_SIZE; + if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, + MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) + err(1, "mmap"); + + share[SYNC] = 0; + for (i = 0; i < PARALLEL; i++) { + if ((pids[i] = fork()) == 0) + test(); + if (pids[i] == -1) + err(1, "fork()"); + } + for (i = 0; i < PARALLEL; i++) { + if (waitpid(pids[i], &status, 0) == -1) + err(1, "waitpid(%d)", pids[i]); + if (status != 0) { + if (WIFSIGNALED(status)) + fprintf(stderr, + "pid %d exit signal %d\n", + pids[i], WTERMSIG(status)); + } + e += status == 0 ? 0 : 1; + } + + return (e); +}
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