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#!/bin/sh
#
# Copyright (c) 2013 Peter Holm
# 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.
#
# UFS cache inconsistency for rename(2) demonstrated
# Fails with:
# ls -ali /mnt
# ls: tfa1022: No such file or directory
# Fixed by r248422
# Test scenario obtained from Rick Miller <vmiller at hostileadmin com>
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
# This threaded test is designed for MP.
[ `sysctl hw.ncpu | sed 's/.* //'` -eq 1 ] && exit 0
. ../default.cfg
odir=`pwd`
cd /tmp
sed '1,/^EOF/d' < $odir/$0 > namecache2.c
rm -f /tmp/namecache2
mycc -o namecache2 -Wall -Wextra -g -O2 namecache2.c -lpthread || exit 1
rm -f namecache2.c
cd $odir
mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart
mdconfig -a -t swap -s 1g -u $mdstart
newfs $newfs_flags md$mdstart > /dev/null
mount /dev/md$mdstart $mntpoint
(cd $mntpoint; /tmp/namecache2)
f=`(cd $mntpoint; echo *)`
if [ "$f" != '*' ]; then
echo FAIL
echo "echo $mntpoint/*"
echo $mntpoint/*
echo ""
echo "ls -ali $mntpoint"
ls -ali $mntpoint
echo ""
echo "fsdb -r /dev/md$mdstart"
fsdb -r /dev/md$mdstart <<-EF
ls
quit
EF
fi
while mount | grep $mntpoint | grep -q /dev/md; do
umount $mntpoint || sleep 1
done
mdconfig -d -u $mdstart
rm -f /tmp/namecache2
exit 0
EOF
/*
* NOTE: This must be run with the current working directory on a local UFS
* disk partition, to demonstrate a FreeBSD namecache bug. I have never seen
* this bug happen with an NFS partition.
*/
#include <pthread.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
int stopping = false;
char *pFilename = 0;
static void *
statThread(void *arg __unused)
{
struct stat statData;
int rc;
for (;;) {
while (pFilename == 0) {
if (stopping)
return 0;
}
rc = stat(pFilename, &statData);
if (rc < 0 && errno != ENOENT) {
printf(" statThread stat() on %s failed with errno %d\n",
pFilename, errno);
return 0;
}
}
return 0;
}
int
main(void)
{
char filename1 [20], filename2[20], filename3[20];
pthread_t threadId;
struct stat statData;
int result, fd;
unsigned int number;
struct timespec period;
time_t start;
sprintf(filename1, "tfa0");
fd = open(filename1, O_CREAT, S_IRWXU);
if (fd < 0) {
printf("open(O_CREAT) on %s failed with errno %d\n", filename1, errno);
return 0;
}
if (close(fd) < 0) {
printf("close() on %s failed with errno %d\n", filename1, errno);
return 0;
}
result = pthread_create(&threadId, NULL, statThread, NULL);
if (result < 0)
errc(1, result, "pthread_create()");
start = time(NULL);
for (number = 0; number < 0x001FFFFF; number += 2) {
sprintf(filename1, "tfa%u", number);
sprintf(filename2, "tfa%u", number + 1);
sprintf(filename3, "tfa%u", number + 2);
if (rename(filename1, filename2) < 0) {
printf(" rename1() from %s to %s failed with errno %d\n",
filename1, filename2, errno);
return 0;
}
pFilename = filename3;
if (rename(filename2, filename3) < 0) {
printf(" rename2() from %s to %s failed with errno %d\n",
filename2, filename3, errno);
return 0;
}
pFilename = 0;
period.tv_sec = 0;
period.tv_nsec = 500;
nanosleep(&period, 0);
if (stat(filename3, &statData) < 0) {
printf("stat(%s) failed with errno %d\n", filename3, errno);
stopping = true;
period.tv_sec = 0;
period.tv_nsec = 500;
nanosleep(&period, 0);
return 0;
}
if (time(NULL) - start > 1200) {
fprintf(stderr, "Test timed out.\n");
break;
}
}
unlink(filename3);
return 0;
}
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