1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2020 Peter Holm <pho@FreeBSD.org> 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# "panic: Memory modified after free" seen: 31# https://people.freebsd.org/~pho/stress/log/sendfile19.txt 32# Broken by r358995-r359002 33# Fixed by r359778 34 35. ../default.cfg 36 37[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 38[ -z "$nfs_export" ] && exit 0 39ping -c 2 `echo $nfs_export | sed 's/:.*//'` > /dev/null 2>&1 || 40 exit 0 41 42odir=`pwd` 43cd /tmp 44sed '1,/^EOF/d' < $odir/$0 > sendfile19.c 45mycc -o sendfile19 -Wall sendfile19.c -pthread || exit 1 46rm -f sendfile19.c 47 48(cd $odir/../testcases/swap; ./swap -t 5m -i 20 -l 100) & 49sleep 5 50mount | grep "$mntpoint" | grep -q nfs && umount $mntpoint 51mount -t nfs -o tcp -o retrycnt=3 -o intr,soft -o rw $nfs_export $mntpoint 52 53cd $mntpoint 54parallel=1000 55for i in `jot $parallel`; do 56 size=`jot -r 1 1 $((2 * 1024 * 1024))` 57 dd if=/dev/zero of=input.$i bs=$size count=1 status=none 58done 59cd $odir 60while mount | grep "$mntpoint " | grep -q nfs; do 61 umount -f $mntpoint 62done 63sleep 1 64mount -t nfs -o tcp -o retrycnt=3 -o intr,soft -o rw $nfs_export $mntpoint 65spid=$! 66cd $mntpoint 67pids= 68for i in `jot $parallel`; do 69 /tmp/sendfile19 input.$i output.$i 1234$i & 70 pids="$pids $!" 71done 72for p in $pids; do 73 wait $p 74done 75for i in `jot $parallel`; do 76 rm -f input.$i output.$i 77done 78while pkill swap; do :; done 79wait $spid 80 81cd $odir 82umount $mntpoint 83while mount | grep "$mntpoint " | grep -q nfs; do 84 umount -f $mntpoint 85done 86rm -f /tmp/sendfile19 87exit 0 88EOF 89/* Slightly modified scenario from sendfile.sh */ 90#include <err.h> 91#include <fcntl.h> 92#include <netdb.h> 93#include <netinet/in.h> 94#include <signal.h> 95#include <stdio.h> 96#include <stdlib.h> 97#include <string.h> 98#include <sys/param.h> 99#include <sys/socket.h> 100#include <sys/stat.h> 101#include <unistd.h> 102 103int port; 104char *inputFile; 105char *outputFile; 106int bufsize = 4096; 107 108static void 109reader(void) { 110 int tcpsock, msgsock; 111 int on; 112 socklen_t len; 113 struct sockaddr_in inetaddr, inetpeer; 114 int n, t, *buf, fd; 115 116 on = 1; 117 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) 118 err(1, "socket(), %s:%d", __FILE__, __LINE__); 119 120 if (setsockopt(tcpsock, 121 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 122 err(1, "setsockopt(), %s:%d", __FILE__, __LINE__); 123 124 inetaddr.sin_family = AF_INET; 125 inetaddr.sin_addr.s_addr = INADDR_ANY; 126 inetaddr.sin_port = htons(port); 127 inetaddr.sin_len = sizeof(inetaddr); 128 129 if (bind(tcpsock, 130 (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) 131 err(1, "bind(), %s:%d", __FILE__, __LINE__); 132 133 if (listen(tcpsock, 5) < 0) 134 err(1, "listen(), %s:%d", __FILE__, __LINE__); 135 136 len = sizeof(inetpeer); 137 if ((msgsock = accept(tcpsock, 138 (struct sockaddr *)&inetpeer, &len)) < 0) 139 err(1, "accept(), %s:%d", __FILE__, __LINE__); 140 141 t = 0; 142 if ((buf = malloc(bufsize)) == NULL) 143 err(1, "malloc(%d), %s:%d", bufsize, __FILE__, __LINE__); 144 145 if ((fd = open(outputFile, O_RDWR | O_CREAT | O_TRUNC, 0640)) == -1) 146 err(1, "open(%s)", outputFile); 147 148 for (;;) { 149 if ((n = read(msgsock, buf, bufsize)) < 0) 150 err(1, "read(), %s:%d", __FILE__, __LINE__); 151 t += n; 152 if (n == 0) 153 break; 154 155 if ((write(fd, buf, n)) != n) 156 err(1, "write"); 157 } 158 close(msgsock); 159 close(fd); 160 return; 161} 162 163static void 164writer(void) { 165 int tcpsock, on; 166 struct sockaddr_in inetaddr; 167 struct hostent *hostent; 168 struct stat statb; 169 int i, r, fd; 170 off_t off = 0; 171#if 1 172 size_t size; 173#endif 174 175 on = 1; 176 for (i = 1; i < 5; i++) { 177 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) 178 err(1, "socket(), %s:%d", __FILE__, __LINE__); 179 180 if (setsockopt(tcpsock, 181 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 182 err(1, "setsockopt(), %s:%d", __FILE__, __LINE__); 183 184#if 1 /* livelock trigger */ 185 size = getpagesize() -4; 186 if (setsockopt(tcpsock, SOL_SOCKET, SO_SNDBUF, (void *)&size, 187 sizeof(size)) < 0) 188 err(1, "setsockopt(SO_SNDBUF), %s:%d", 189 __FILE__, __LINE__); 190#endif 191 192 hostent = gethostbyname ("localhost"); 193 memcpy (&inetaddr.sin_addr.s_addr, hostent->h_addr, 194 sizeof (struct in_addr)); 195 196 inetaddr.sin_family = AF_INET; 197 inetaddr.sin_port = htons(port); 198 inetaddr.sin_len = sizeof(inetaddr); 199 200 r = connect(tcpsock, (struct sockaddr *) &inetaddr, 201 sizeof(inetaddr)); 202 if (r == 0) 203 break; 204 sleep(1); 205 close(tcpsock); 206 } 207 if (r < 0) 208 err(1, "connect(), %s:%d", __FILE__, __LINE__); 209 210 if (stat(inputFile, &statb) != 0) 211 err(1, "stat(%s)", inputFile); 212 213 if ((fd = open(inputFile, O_RDONLY)) == -1) 214 err(1, "open(%s)", inputFile); 215 216 if (sendfile(fd, tcpsock, 0, statb.st_size, NULL, &off, SF_NOCACHE) == -1) 217 err(1, "sendfile"); 218 219 return; 220} 221 222int 223main(int argc, char **argv) 224{ 225 pid_t pid; 226 227 if (argc != 4) { 228 fprintf(stderr, "Usage: %s <inputFile outputFile portNumber\n", 229 argv[0]); 230 return (1); 231 } 232 inputFile = argv[1]; 233 outputFile = argv[2]; 234 port = atoi(argv[3]); 235 236 if ((pid = fork()) == 0) { 237 writer(); 238 exit(EXIT_SUCCESS); 239 } else if (pid > 0) { 240 reader(); 241 kill(pid, SIGINT); 242 } else 243 err(1, "fork(), %s:%d", __FILE__, __LINE__); 244 245 return (0); 246} 247