#!/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.
#
# Demonstrate "wrong handling for suspend".
# https://www.mail-archive.com/freebsd-current@freebsd.org/msg166333.html
# panic: Failed to register NFS lock locally - error=11
# https://people.freebsd.org/~pho/stress/log/kostik897.txt
# Fixed in r302013.
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
pgrep -q lockd || { echo "lockd not running."; exit 1; }
. ../default.cfg
[ -z "$nfs_export" ] && exit 0
ping -c 2 `echo $nfs_export | sed 's/:.*//'` > /dev/null 2>&1 ||
exit 0
here=`pwd`
cd /tmp
sed '1,/^EOF/d' < $here/$0 > nfs15lockd.c
mycc -o nfs15lockd -Wall -Wextra -O2 -g nfs15lockd.c -lpthread || exit 1
rm -f nfs15lockd.c
cd $here
mount | grep "on $mntpoint " | grep nfs > /dev/null && umount $mntpoint
[ $# -ne 0 ] &&
# Problem only seen with lockd
{ echo "Not using lockd"; debug="-o nolockd"; }
mount -t nfs -o tcp -o retrycnt=3 -o soft -o rw $debug \
$nfs_export $mntpoint
sleep 2
s=0
lockf -t 10 $mntpoint/$$.lock sleep 2 > /tmp/$$.log 2>&1
if grep -q "No locks available" /tmp/$$.log; then
echo "Is lockd running on the remote host?"
rm /tmp/$$.log
s=1
fi
wd=$mntpoint/nfs15lockd-`jot -rc 8 a z | tr -d '\n'`.dir
rm -rf $wd
mkdir $wd
echo "Expect: nfs15lockd exited on signal 6 (core dumped)"
(cd $wd; /tmp/nfs15lockd) &
start=`date '+%s'`
while [ $((`date '+%s'` - start)) -lt 600 ]; do
pgrep -q nfs15lockd || break
sleep 2
done
if pgrep -q nfs15lockd; then
s=2
echo "Thread suspension issue:"
ps -lx | grep -v grep | grep nfs15lockd | grep "T+" | \
awk '{print $2}' | while read pid; do
ps -lp$pid
procstat -k $pid
kill -9 $pid
done
pkill nfs15lockd
fi
wait
rm -rf $wd
n=0
while mount | grep "on $mntpoint " | grep -q nfs; do
umount $mntpoint && break
n=$((n + 1))
if [ $n -gt 60 ]; then
fstat -mf $mntpoint
s=3
break
fi
sleep 2
done 2>&1 | awk '!seen[$0]++'
mount | grep -q "on $mntpoint " && umount -f $mntpoint
rm -f /tmp/nfs15lockd nfs15lockd.core
exit $s
EOF
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <machine/atomic.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define PARALLEL 4
#define RUNTIME 300
#define SYNC 0
volatile u_int *share;
static void *
t1(void *data __unused)
{
atomic_add_int(&share[SYNC], 1);
usleep(arc4random() % 8000);
raise(SIGABRT);
return (NULL);
}
static void *
t2(void *data __unused)
{
int fd, i, r;
char file[80];
for (i = 0; i < 100; i++) {
atomic_add_int(&share[SYNC], 1);
snprintf(file, sizeof(file), "file.%06d", i);
if ((fd = open(file, O_WRONLY | O_CREAT | O_APPEND,
DEFFILEMODE)) == -1)
err(1, "open(%s)", file);
do {
r = lockf(fd, F_LOCK, 0);
} while (r == -1 && (errno == EDEADLK || errno == EINTR));
if (r == -1)
err(1, "lockf(%s, F_LOCK)", file);
write(fd, "x", 1);
usleep(arc4random() % 1000);
if (lseek(fd, 0, SEEK_SET) == -1)
err(1, "lseek");
if (lockf(fd, F_ULOCK, 0) == -1)
err(1, "lockf(%s, F_ULOCK)", file);
close(fd);
}
return (NULL);
}
int
test(void)
{
pthread_t tid[3];
int i, rc;
for (i = 0; i < 10; i++) {
if ((rc = pthread_create(&tid[0], NULL, t2, NULL)) == -1)
errc(1, rc, "pthread_create");
if ((rc = pthread_create(&tid[1], NULL, t2, NULL)) == -1)
errc(1, rc, "pthread_create");
if ((rc = pthread_create(&tid[2], NULL, t1, NULL)) == -1)
errc(1, rc, "pthread_create");
if ((rc = pthread_join(tid[0], NULL)) == -1)
errc(1, rc, "pthread_join");
if ((rc = pthread_join(tid[1], NULL)) == -1)
errc(1, rc, "pthread_join");
if ((rc = pthread_join(tid[2], NULL)) == -1)
errc(1, rc, "pthread_join");
}
_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 < PARALLEL; i++) {
if ((pids[i] = fork()) == 0)
test();
}
for(;;) {
if (share[SYNC] > 0)
atomic_add_int(&share[SYNC], -1);
for (i = 0; i < PARALLEL; i++)
kill(pids[i], SIGSTOP);
usleep(1000);
for (i = 0; i < PARALLEL; i++)
kill(pids[i], SIGCONT);
usleep(100 + arc4random() % 400);
if (share[SYNC] == 0) { /* If all procs are done */
usleep(500);
if (share[SYNC] == 0)
break;
}
}
for (i = 0; i < PARALLEL; i++) {
if (waitpid(pids[i], &status, 0) != pids[i])
err(1, "waitpid");
}
}
return (0);
}
