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|
#!/bin/sh
#
# Copyright (c) 2013 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.
#
# Test scenario by Nate Eldredge neldredge math ucsdnedu
# kern/127213: [tmpfs] sendfile on tmpfs data corruption
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
. ../default.cfg
set -e
odir=`pwd`
cd /tmp
cat > server.c <<EOF
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include "util.h"
int main(int argc, char *argv[]) {
int f, listener, connection;
if (argc < 3) {
fprintf(stderr, "Usage: %s filename socketname\n", argv[0]);
exit(1);
}
if ((f = open(argv[1], O_RDONLY)) < 0) {
perror(argv[1]);
exit(1);
}
if ((listener = listen_unix_socket(argv[2])) < 0) {
exit(1);
}
if ((connection = accept_unix_socket(listener)) >= 0) {
real_sendfile(f, connection);
}
return 0;
}
EOF
cat > client.c <<EOF
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include "util.h"
int main(int argc, char *argv[]) {
int s;
if (argc < 2) {
fprintf(stderr, "Usage: %s socketname\n", argv[0]);
exit(1);
}
if ((s = connect_unix_socket(argv[1])) < 0) {
exit(1);
}
fake_sendfile(s, 1);
return 0;
}
EOF
cat > util.c <<EOF
/* send data from file to unix domain socket */
#include <stdio.h>
#include <time.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
int create_unix_socket(void) {
int fd;
if ((fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
perror("socket");
return -1;
}
return fd;
}
int make_unix_sockaddr(const char *pathname, struct sockaddr_un *sa) {
memset(sa, 0, sizeof(*sa));
sa->sun_family = PF_LOCAL;
if (strlen(pathname) + 1 > sizeof(sa->sun_path)) {
// fprintf(stderr, "%s: pathname too long (max %lu)\n",
// pathname, sizeof(sa->sun_path));
errno = ENAMETOOLONG;
return -1;
}
strcpy(sa->sun_path, pathname);
return 0;
}
static char *sockname;
void delete_socket(void) {
unlink(sockname);
}
int listen_unix_socket(const char *path) {
int fd;
struct sockaddr_un sa;
if (make_unix_sockaddr(path, &sa) < 0)
return -1;
if ((fd = create_unix_socket()) < 0)
return -1;
if (bind(fd, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
perror("bind");
close(fd);
return -1;
}
sockname = strdup(path);
atexit(delete_socket);
if (listen(fd, 5) < 0) {
perror("listen");
close(fd);
return -1;
}
return fd;
}
int accept_unix_socket(int fd) {
int s;
if ((s = accept(fd, NULL, 0)) < 0) {
perror("accept");
return -1;
}
return s;
}
int connect_unix_socket(const char *path) {
int fd;
struct sockaddr_un sa;
if (make_unix_sockaddr(path, &sa) < 0)
return -1;
if ((fd = create_unix_socket()) < 0)
return -1;
if (connect(fd, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
perror("connect");
return -1;
}
return fd;
}
#define BUFSIZE 65536
int fake_sendfile(int from, int to) {
char buf[BUFSIZE];
int v;
int sent = 0;
while ((v = read(from, buf, BUFSIZE)) > 0) {
int d = 0;
while (d < v) {
int w = write(to, buf, v - d);
if (w <= 0) {
perror("write");
return -1;
}
d += w;
sent += w;
}
}
if (v != 0) {
perror("read");
return -1;
}
return sent;
}
int real_sendfile(int from, int to) {
int v;
v = sendfile(from, to, 0, 0, NULL, NULL, 0);
if (v < 0) {
perror("sendfile");
}
return v;
}
EOF
cat > util.h <<EOF
/* send data from file to unix domain socket */
#include <stdio.h>
#include <time.h>
#include <signal.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
int create_unix_socket(void);
int make_unix_sockaddr(const char *pathname, struct sockaddr_un *sa);
int listen_unix_socket(const char *path);
int accept_unix_socket(int fd);
int connect_unix_socket(const char *path);
int fake_sendfile(int from, int to);
int real_sendfile(int from, int to);
EOF
mycc -c -Wall -Wextra -O2 util.c
mycc -o server -Wall -Wextra -O2 server.c util.o
mycc -o client -Wall -Wextra -O2 client.c util.o
rm -f server.c client.c util.c util.o util.h mysocket
mount | grep "$mntpoint" | grep -q tmpfs && umount $mntpoint
mount -t tmpfs tmpfs $mntpoint
dd if=/dev/random of=$mntpoint/data bs=123456 count=1 status=none
./server $mntpoint/data mysocket &
sleep 0.2
./client mysocket > data.$$
cmp $mntpoint/data data.$$ ||
{ echo "FAIL Data mismatch"; ls -l $mntpoint/data data.$$; }
rm -f data.$$ server client mysocket
wait
while mount | grep "$mntpoint" | grep -q tmpfs; do
umount $mntpoint || sleep 1
done
|
