#!/bin/sh
#
# Copyright (c) 2015 EMC Corp.
# 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.
#
# Show invalid fts_info value:
# FAULT
# -rw------- 1 root wheel - 4 13 jan 09:25 ./lockf.0.3676
# fts_path: ./lockf.0.3676
# fts_info: 13 FTS_SLNONE
# fts_errno: 0 No error: 0
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
. ../default.cfg
cat > /tmp/fts2.c <<EOF
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <fts.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define LOOPS 1
#define PARALLEL 7
pid_t pid;
time_t start;
int fd;
char file[128];
char *txt[] = {
"NULL",
"FTS_D",
"FTS_DC",
"FTS_DEFAULT",
"FTS_DNR",
"FTS_DOT",
"FTS_DP",
"FTS_ERR",
"FTS_F",
"FTS_INIT",
"FTS_NS",
"FTS_NSOK",
"FTS_SL",
"FTS_SLNONE",
"FTS_W",
"15",
"16",
"17",
};
int
get(void) {
int sem;
if (lockf(fd, F_LOCK, 0) == -1)
err(1, "lockf(%s, F_LOCK)", file);
if (read(fd, &sem, sizeof(sem)) != sizeof(sem))
err(1, "get: read(%d)", fd);
if (lseek(fd, 0, SEEK_SET) == -1)
err(1, "lseek");
if (lockf(fd, F_ULOCK, 0) == -1)
err(1, "lockf(%s, F_ULOCK)", file);
return (sem);
}
void
incr(void) {
int sem;
if (lockf(fd, F_LOCK, 0) == -1)
err(1, "lockf(%s, F_LOCK)", file);
if (read(fd, &sem, sizeof(sem)) != sizeof(sem))
err(1, "incr: read(%d)", fd);
if (lseek(fd, 0, SEEK_SET) == -1)
err(1, "lseek");
sem++;
if (write(fd, &sem, sizeof(sem)) != sizeof(sem))
err(1, "incr: read");
if (lseek(fd, 0, SEEK_SET) == -1)
err(1, "lseek");
if (lockf(fd, F_ULOCK, 0) == -1)
err(1, "lockf(%s, F_ULOCK)", file);
}
void
tlockf(void)
{
int i;
int sem = 0;
usleep(arc4random() % 10000);
sprintf(file, "lockf.0.%d", getpid());
if ((fd = open(file,O_CREAT | O_TRUNC | O_RDWR, 0600)) == -1)
err(1, "creat(%s)", file);
if (write(fd, &sem, sizeof(sem)) != sizeof(sem))
err(1, "write");
if (lseek(fd, 0, SEEK_SET) == -1)
err(1, "lseek");
pid = fork();
if (pid == -1) {
perror("fork");
exit(2);
}
if (pid == 0) { /* child */
for (i = 0; i < 100; i++) {
while ((get() & 1) == 0)
;
incr();
}
exit(0);
} else { /* parent */
for (i = 0; i < 100; i++) {
while ((get() & 1) == 1)
;
incr();
}
}
close(fd);
waitpid(pid, &i, 0);
unlink(file);
}
void
tmkdir(void)
{
pid_t pid;
int i, j;
char name[80];
setproctitle(__func__);
usleep(arc4random() % 10000);
pid = getpid();
for (j = 0; j < LOOPS; j++) {
for (i = 0; i < 1000; i++) {
snprintf(name, sizeof(name), "dir.%d.%06d", pid, i);
if (mkdir(name, 0644) == -1)
err(1, "mkdir(%s)", name);
}
for (i = 0; i < 1000; i++) {
snprintf(name, sizeof(name), "dir.%d.%06d", pid, i);
if (rmdir(name) == -1)
err(1, "unlink(%s)", name);
}
}
}
void
tfts(void)
{
FTS *fts;
FTSENT *p;
int ftsoptions, i;
char *args[2];
char help[80];
usleep(arc4random() % 10000);
ftsoptions = FTS_LOGICAL;
args[0] = ".";
args[1] = 0;
for (i = 0; i < 10; i++) {
if ((fts = fts_open(args, ftsoptions, NULL)) == NULL)
err(1, "fts_open");
while ((p = fts_read(fts)) != NULL) {
if (p->fts_info == FTS_D || /* preorder directory */
p->fts_info == FTS_DNR || /* unreadable directory */
p->fts_info == FTS_DOT || /* dot or dot-dot */
p->fts_info == FTS_DP || /* postorder directory */
p->fts_info == FTS_F || /* regular file */
p->fts_info == FTS_NS) /* stat(2) failed */
continue;
fprintf(stderr, "FAULT\n");
sprintf(help, "ls -lo %s", p->fts_path);
system(help);
fprintf(stderr, "fts_path: %s\n", p->fts_path);
fprintf(stderr, "fts_info: %d %s\n", p->fts_info,
txt[p->fts_info]);
fprintf(stderr, "fts_errno: %d %s\n", p->fts_errno,
strerror(p->fts_errno));
}
if (errno != 0 && errno != ENOENT)
err(1, "fts_read");
if (fts_close(fts) == -1)
err(1, "fts_close()");
}
}
void
test(void)
{
start = time(NULL);
if (fork() == 0) {
while (time(NULL) - start < 60)
tmkdir();
_exit(0);
}
if (fork() == 0) {
while (time(NULL) - start < 60)
tlockf();
_exit(0);
}
if (fork() == 0) {
while (time(NULL) - start < 60)
tfts();
_exit(0);
}
wait(NULL);
wait(NULL);
wait(NULL);
_exit(0);
}
int
main(void)
{
int i;
for (i = 0; i < PARALLEL; i++)
if (fork() == 0)
test();
for (i = 0; i < PARALLEL; i++)
wait(NULL);
return (0);
}
EOF
mycc -o /tmp/fts2 -Wall -Wextra -O0 -g /tmp/fts2.c || exit 1
mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
mdconfig -a -t swap -s 1g -u $mdstart || exit 1
bsdlabel -w md$mdstart auto
newfs md${mdstart}$part > /dev/null
mount /dev/md${mdstart}$part $mntpoint
(cd $mntpoint; /tmp/fts2)
while mount | grep $mntpoint | grep -q /dev/md; do
umount $mntpoint || sleep 1
done
mdconfig -d -u $mdstart
rm /tmp/fts2 /tmp/fts2.c
