svn commit: r358480 - user/pho/stress2/misc
Peter Holm
pho at FreeBSD.org
Sun Mar 1 08:44:16 UTC 2020
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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