#!/bin/sh
#
# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
#
# Copyright (c) 2020 Peter Holm <pho@FreeBSD.org>
#
# 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.
#
# "panic: Memory modified after free" seen:
# https://people.freebsd.org/~pho/stress/log/sendfile19.txt
# Broken by r358995-r359002
# Fixed by r359778
. ../default.cfg
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
[ -z "$nfs_export" ] && exit 0
ping -c 2 `echo $nfs_export | sed 's/:.*//'` > /dev/null 2>&1 ||
exit 0
odir=`pwd`
cd /tmp
sed '1,/^EOF/d' < $odir/$0 > sendfile19.c
mycc -o sendfile19 -Wall sendfile19.c -pthread || exit 1
rm -f sendfile19.c
(cd $odir/../testcases/swap; ./swap -t 5m -i 20 -l 100) &
sleep 5
mount | grep "$mntpoint" | grep -q nfs && umount $mntpoint
mount -t nfs -o tcp -o retrycnt=3 -o intr,soft -o rw $nfs_export $mntpoint
cd $mntpoint
parallel=1000
for i in `jot $parallel`; do
size=`jot -r 1 1 $((2 * 1024 * 1024))`
dd if=/dev/zero of=input.$i bs=$size count=1 status=none
done
cd $odir
while mount | grep "$mntpoint " | grep -q nfs; do
umount -f $mntpoint
done
sleep 1
mount -t nfs -o tcp -o retrycnt=3 -o intr,soft -o rw $nfs_export $mntpoint
spid=$!
cd $mntpoint
pids=
for i in `jot $parallel`; do
/tmp/sendfile19 input.$i output.$i 1234$i &
pids="$pids $!"
done
for p in $pids; do
wait $p
done
for i in `jot $parallel`; do
rm -f input.$i output.$i
done
while pkill swap; do :; done
wait $spid
cd $odir
umount $mntpoint
while mount | grep "$mntpoint " | grep -q nfs; do
umount -f $mntpoint
done
rm -f /tmp/sendfile19
exit 0
EOF
/* Slightly modified scenario from sendfile.sh */
#include <err.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <unistd.h>
int port;
char *inputFile;
char *outputFile;
int bufsize = 4096;
static void
reader(void) {
int tcpsock, msgsock;
int on;
socklen_t len;
struct sockaddr_in inetaddr, inetpeer;
int n, t, *buf, fd;
on = 1;
if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
err(1, "socket(), %s:%d", __FILE__, __LINE__);
if (setsockopt(tcpsock,
SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
err(1, "setsockopt(), %s:%d", __FILE__, __LINE__);
inetaddr.sin_family = AF_INET;
inetaddr.sin_addr.s_addr = INADDR_ANY;
inetaddr.sin_port = htons(port);
inetaddr.sin_len = sizeof(inetaddr);
if (bind(tcpsock,
(struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0)
err(1, "bind(), %s:%d", __FILE__, __LINE__);
if (listen(tcpsock, 5) < 0)
err(1, "listen(), %s:%d", __FILE__, __LINE__);
len = sizeof(inetpeer);
if ((msgsock = accept(tcpsock,
(struct sockaddr *)&inetpeer, &len)) < 0)
err(1, "accept(), %s:%d", __FILE__, __LINE__);
t = 0;
if ((buf = malloc(bufsize)) == NULL)
err(1, "malloc(%d), %s:%d", bufsize, __FILE__, __LINE__);
if ((fd = open(outputFile, O_RDWR | O_CREAT | O_TRUNC, 0640)) == -1)
err(1, "open(%s)", outputFile);
for (;;) {
if ((n = read(msgsock, buf, bufsize)) < 0)
err(1, "read(), %s:%d", __FILE__, __LINE__);
t += n;
if (n == 0)
break;
if ((write(fd, buf, n)) != n)
err(1, "write");
}
close(msgsock);
close(fd);
return;
}
static void
writer(void) {
int tcpsock, on;
struct sockaddr_in inetaddr;
struct hostent *hostent;
struct stat statb;
int i, r, fd;
off_t off = 0;
#if 1
size_t size;
#endif
on = 1;
for (i = 1; i < 5; i++) {
if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
err(1, "socket(), %s:%d", __FILE__, __LINE__);
if (setsockopt(tcpsock,
SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0)
err(1, "setsockopt(), %s:%d", __FILE__, __LINE__);
#if 1 /* livelock trigger */
size = getpagesize() -4;
if (setsockopt(tcpsock, SOL_SOCKET, SO_SNDBUF, (void *)&size,
sizeof(size)) < 0)
err(1, "setsockopt(SO_SNDBUF), %s:%d",
__FILE__, __LINE__);
#endif
hostent = gethostbyname ("localhost");
memcpy (&inetaddr.sin_addr.s_addr, hostent->h_addr,
sizeof (struct in_addr));
inetaddr.sin_family = AF_INET;
inetaddr.sin_port = htons(port);
inetaddr.sin_len = sizeof(inetaddr);
r = connect(tcpsock, (struct sockaddr *) &inetaddr,
sizeof(inetaddr));
if (r == 0)
break;
sleep(1);
close(tcpsock);
}
if (r < 0)
err(1, "connect(), %s:%d", __FILE__, __LINE__);
if (stat(inputFile, &statb) != 0)
err(1, "stat(%s)", inputFile);
if ((fd = open(inputFile, O_RDONLY)) == -1)
err(1, "open(%s)", inputFile);
if (sendfile(fd, tcpsock, 0, statb.st_size, NULL, &off, SF_NOCACHE) == -1)
err(1, "sendfile");
return;
}
int
main(int argc, char **argv)
{
pid_t pid;
if (argc != 4) {
fprintf(stderr, "Usage: %s <inputFile outputFile portNumber\n",
argv[0]);
return (1);
}
inputFile = argv[1];
outputFile = argv[2];
port = atoi(argv[3]);
if ((pid = fork()) == 0) {
writer();
exit(EXIT_SUCCESS);
} else if (pid > 0) {
reader();
kill(pid, SIGINT);
} else
err(1, "fork(), %s:%d", __FILE__, __LINE__);
return (0);
}
