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#!/bin/sh
#
# Copyright (c) 2010 Peter Holm <pho@FreeBSD.org>
# 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.
#
# Vnode reference leak test scenario by kib@.
# Will fail with "umount: unmount of /mnt5 failed: Device busy"
# vnode leak not seen on HEAD.
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
. ../default.cfg
here=`pwd`
mounts=2 # Number of parallel scripts
D=$diskimage
[ -d "$RUNDIR" ] || mkdir $RUNDIR
cd $RUNDIR
if [ $# -eq 0 ]; then
sed '1,/^EOF/d' < $here/$0 > vunref.c
mycc -o /tmp/vunref -Wall -Wextra -O2 vunref.c
rm -f vunref.c
cd $here
rm -f $RUNDIR/active.*
for i in `jot $mounts`; do
m=$(( i + mdstart - 1 ))
[ ! -d ${mntpoint}$m ] && mkdir ${mntpoint}$m
mount | grep "$mntpoint" | grep -q md$m && umount -f ${mntpoint}$m
mdconfig -l | grep -q md$m && mdconfig -d -u $m
dd if=/dev/zero of=$D.$m bs=1m count=10 status=none
mdconfig -a -t vnode -f $D.$m -u $m
newfs md${m} > /dev/null 2>&1
done
# start the parallel tests
for i in `jot $mounts`; do
m=$((i + mdstart - 1))
$0 mmap $m &
sleep 0.2
$0 $m &
done
sleep 2
while [ ! -z "`ls $RUNDIR/active.* 2>/dev/null`" ] ; do
../testcases/swap/swap -t 2m -i 20
done
wait
for i in `jot $mounts`; do
m=$((i + mdstart - 1))
mdconfig -d -u $m
rm -f $D$m
done
rm -f /tmp/vunref $RUNDIR/active.* $diskimage.* ${mntpoint}*/p*
else
if [ $1 = mmap ]; then
touch $RUNDIR/active.$2
start=`date +%s`
while [ $((`date +%s`- start)) -lt 300 ]; do
cd ${mntpoint}$2
/tmp/vunref > /dev/null 2>&1
cd /
[ -f $RUNDIR/active.$2 ] || exit
sleep 0.1
done
rm -f $RUNDIR/active.$2
else
# The test: Parallel mount and unmounts
m=$1
mount $opt /dev/md${m} ${mntpoint}$m
while [ -f $RUNDIR/active.$m ] ; do
sleep 0.1
n=0
while mount | grep -qw $mntpoint$m; do
umount ${mntpoint}$m > /dev/null 2>&1 && n=0
if [ $((n += 1)) -gt 600 ]; then
echo "*** Leak detected ***"
fstat $mntpoint$m
rm -f $RUNDIR/active.*
exit 1
fi
sleep 0.1
done
mount $opt /dev/md${m} ${mntpoint}$m
done
mount | grep "$mntpoint" | grep -q md$m && umount ${mntpoint}$m
fi
fi
exit
EOF
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define INPUTFILE "/bin/date"
int
test(void)
{
int i;
pid_t pid;
char file[128];
int fdin, fdout;
char *src, *dst;
struct stat statbuf;
pid = getpid();
for (i = 0; i < 100; i++) {
sprintf(file,"p%05d.%05d", pid, i);
if ((fdin = open(INPUTFILE, O_RDONLY)) < 0)
err(1, INPUTFILE);
if ((fdout = open(file, O_RDWR | O_CREAT | O_TRUNC, 0600)) < 0)
err(1, "%s", file);
if (fstat(fdin, &statbuf) < 0)
err(1, "fstat error");
if (lseek(fdout, statbuf.st_size - 1, SEEK_SET) == -1)
err(1, "lseek error");
/* write a dummy byte at the last location */
if (write(fdout, "", 1) != 1)
err(1, "write error");
if ((src = mmap(0, statbuf.st_size, PROT_READ, MAP_SHARED, fdin, 0)) ==
(caddr_t) - 1)
err(1, "mmap error for input");
if ((dst = mmap(0, statbuf.st_size, PROT_READ | PROT_WRITE,
MAP_SHARED, fdout, 0)) == (caddr_t) - 1)
err(1, "mmap error for output");
memcpy(dst, src, statbuf.st_size);
if (munmap(src, statbuf.st_size) == -1)
err(1, "munmap");
close(fdin);
if (munmap(dst, statbuf.st_size) == -1)
err(1, "munmap");
close(fdout);
if (unlink(file) == -1)
err(3, "unlink(%s)", file);
}
return (0);
}
int
main()
{
int i;
char path[MAXPATHLEN+1];
struct statfs buf;
if (getcwd(path, sizeof(path)) == NULL)
err(1, "getcwd()");
if (statfs(path, &buf) < 0)
err(1, "statfs(%s)", path);
if (!strcmp(buf.f_mntonname, "/"))
return (1);
for (i = 0; i < 2; i++) {
if (fork() == 0)
test();
}
for (i = 0; i < 2; i++)
wait(NULL);
return (0);
}
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