Date: Sun, 1 Mar 2020 08:44:14 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r358480 - user/pho/stress2/misc Message-ID: <202003010844.0218iEGC064408@repo.freebsd.org>
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Author: pho Date: Sun Mar 1 08:44:14 2020 New Revision: 358480 URL: https://svnweb.freebsd.org/changeset/base/358480 Log: Added an old test fcntl(2) fuzz scenario. Added: user/pho/stress2/misc/fcntl2.sh (contents, props changed) Added: user/pho/stress2/misc/fcntl2.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/fcntl2.sh Sun Mar 1 08:44:14 2020 (r358480) @@ -0,0 +1,191 @@ +#!/bin/sh + +# +# SPDX-License-Identifier: BSD-2-Clause-FreeBSD +# +# Copyright (c) 2019 Dell EMC Isilon +# +# 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. +# +# $FreeBSD$ +# + +# fcntl(2) fuzz +# "umount: unmount of /mnt failed: Device busy" seen: +# https://people.freebsd.org/~pho/stress/log/fcntl2.txt + +. ../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/fcntl2.c +mycc -o fcntl2 -Wall -Wextra -O0 -g fcntl2.c || exit 1 +rm -f fcntl2.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 +newfs $newfs_flags md$mdstart > /dev/null +mount /dev/md$mdstart $mntpoint +set +e + +(cd $odir/../testcases/swap; ./swap -t 3m -i 20) & +cd $mntpoint +limits -n 10000 $dir/fcntl2 +s=$? +[ -f fcntl2.core -a $s -eq 0 ] && + { ls -l fcntl2.core; mv fcntl2.core $dir; s=1; } +cd $odir +while pkill swap; do :; done + +for i in `jot 6`; do + mount | grep -q "on $mntpoint " || break + umount $mntpoint && break || sleep 10 + [ $i -eq 6 ] && + { echo FATAL; fstat -mf $mntpoint; exit 1; } +done +mdconfig -d -u $mdstart +rm -rf $dir/fcntl2 +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; + +#define PARALLEL 64 +#define RUNTIME (3 * 60) +#define SYNC 0 + +#define N (128 * 1024 / (int)sizeof(u_int32_t)) +static u_int32_t r[N]; + +static unsigned long +makearg(void) +{ + unsigned long val; + unsigned int i; + + val = arc4random(); + i = arc4random() % 100; + if (i < 20) + val = val & 0xff; + if (i >= 20 && i < 40) + val = val & 0xffff; + if (i >= 40 && i < 60) + val = (unsigned long)(r) | (val & 0xffff); +#if defined(__LP64__) + if (i >= 60) { + val = (val << 32) | arc4random(); + if (i > 80) + val = val & 0x00007fffffffffffUL; + } +#endif + + return (val); +} +static void +test(void) +{ + time_t start; + unsigned long arg3; + int cmd, fd, i, n, success; + char file[80]; + + atomic_add_int(&share[SYNC], 1); + while (share[SYNC] != PARALLEL) + ; + + success = 0; + snprintf(file, sizeof(file), "file.%d", getpid()); + if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, DEFFILEMODE)) + == -1) + err(1, "open(%s)", file); + n = arc4random() % 100 + 1; + for (i = 0; i < n; i++) + if (write(fd, file, sizeof(file)) != sizeof(file)) + err(1, "write()"); + start = time(NULL); + while (time(NULL) - start < 60) { + cmd = arc4random() % 20; + arg3 = makearg(); + alarm(20); + if (fcntl(fd, cmd, arg3) != -1) + success++; + alarm(0); + } + close(fd); + unlink(file); + + + _exit(0); +} + +int +main(void) +{ + pid_t pids[PARALLEL]; + size_t len; + time_t start; + int i, status; + + len = PAGE_SIZE; + if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, + MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) + err(1, "mmap"); + + start = time(NULL); + while ((time(NULL) - start) < RUNTIME) { + for (i = 0; i < N; i++) + r[i] = arc4random(); + 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]); + } + } + + return (0); +}
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