1#!/bin/sh 2 3# 4# Copyright (c) 2009 Peter Holm <pho@FreeBSD.org> 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# Test scenario for sendfile livelock seen on 7.2-STABLE for non SMP 30 31# Scenario by kib@ 32 33. ../default.cfg 34 35odir=`pwd` 36 37cd /tmp 38sed '1,/^EOF/d' < $odir/$0 > sendfile.c 39mycc -o sendfile -Wall -O0 sendfile.c -pthread 40rm -f sendfile.c 41[ -d "$RUNDIR" ] || mkdir -p $RUNDIR 42cd $RUNDIR 43 44in=inputFile 45out=outputFile 46 47for i in 1 2 3 4 8 16 1k 2k 3k 4k 5k 1m 2m 3m 4m 5m ; do 48 rm -f $in $out 49 dd if=/dev/random of=$in bs=$i count=1 status=none 50 /tmp/sendfile $in $out 12345 51 cmp $in $out || { echo FAIL; ls -l $in $out; } 52 rm -f $in $out 53done 54rm -f /tmp/sendfile 55exit 56EOF 57#include <err.h> 58#include <fcntl.h> 59#include <netdb.h> 60#include <netinet/in.h> 61#include <signal.h> 62#include <stdio.h> 63#include <stdlib.h> 64#include <string.h> 65#include <sys/param.h> 66#include <sys/socket.h> 67#include <sys/stat.h> 68#include <unistd.h> 69 70int port; 71char *inputFile; 72char *outputFile; 73int bufsize = 4096; 74 75static void 76reader(void) { 77 int tcpsock, msgsock; 78 int on; 79 socklen_t len; 80 struct sockaddr_in inetaddr, inetpeer; 81 int n, t __unused, *buf, fd; 82 83 on = 1; 84 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) 85 err(1, "socket(), %s:%d", __FILE__, __LINE__); 86 87 if (setsockopt(tcpsock, 88 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 89 err(1, "setsockopt(), %s:%d", __FILE__, __LINE__); 90 91 inetaddr.sin_family = AF_INET; 92 inetaddr.sin_addr.s_addr = INADDR_ANY; 93 inetaddr.sin_port = htons(port); 94 inetaddr.sin_len = sizeof(inetaddr); 95 96 if (bind(tcpsock, 97 (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) 98 err(1, "bind(), %s:%d", __FILE__, __LINE__); 99 100 if (listen(tcpsock, 5) < 0) 101 err(1, "listen(), %s:%d", __FILE__, __LINE__); 102 103 len = sizeof(inetpeer); 104 if ((msgsock = accept(tcpsock, 105 (struct sockaddr *)&inetpeer, &len)) < 0) 106 err(1, "accept(), %s:%d", __FILE__, __LINE__); 107 108 t = 0; 109 if ((buf = malloc(bufsize)) == NULL) 110 err(1, "malloc(%d), %s:%d", bufsize, __FILE__, __LINE__); 111 112 if ((fd = open(outputFile, O_RDWR | O_CREAT | O_TRUNC, 0640)) == -1) 113 err(1, "open(%s)", outputFile); 114 115 for (;;) { 116 if ((n = read(msgsock, buf, bufsize)) < 0) 117 err(1, "read(), %s:%d", __FILE__, __LINE__); 118 t += n; 119 if (n == 0) 120 break; 121 122 if ((write(fd, buf, n)) != n) 123 err(1, "write"); 124 } 125 close(msgsock); 126 close(fd); 127 return; 128} 129 130static void 131writer(void) { 132 int tcpsock, on; 133 struct sockaddr_in inetaddr; 134 struct hostent *hostent; 135 struct stat statb; 136 int i, r, fd; 137 off_t off = 0; 138#if 1 139 size_t size; 140#endif 141 142 on = 1; 143 for (i = 1; i < 5; i++) { 144 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) 145 err(1, "socket(), %s:%d", __FILE__, __LINE__); 146 147 if (setsockopt(tcpsock, 148 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 149 err(1, "setsockopt(), %s:%d", __FILE__, __LINE__); 150 151#if 1 /* livelock trigger */ 152 size = getpagesize() -4; 153 if (setsockopt(tcpsock, SOL_SOCKET, SO_SNDBUF, (void *)&size, 154 sizeof(size)) < 0) 155 err(1, "setsockopt(SO_SNDBUF), %s:%d", 156 __FILE__, __LINE__); 157#endif 158 159 hostent = gethostbyname ("localhost"); 160 memcpy (&inetaddr.sin_addr.s_addr, hostent->h_addr, 161 sizeof (struct in_addr)); 162 163 inetaddr.sin_family = AF_INET; 164 inetaddr.sin_port = htons(port); 165 inetaddr.sin_len = sizeof(inetaddr); 166 167 r = connect(tcpsock, (struct sockaddr *) &inetaddr, 168 sizeof(inetaddr)); 169 if (r == 0) 170 break; 171 sleep(1); 172 close(tcpsock); 173 } 174 if (r < 0) 175 err(1, "connect(), %s:%d", __FILE__, __LINE__); 176 177 if (stat(inputFile, &statb) != 0) 178 err(1, "stat(%s)", inputFile); 179 180 if ((fd = open(inputFile, O_RDONLY)) == -1) 181 err(1, "open(%s)", inputFile); 182 183 if (sendfile(fd, tcpsock, 0, statb.st_size, NULL, &off, 0) == -1) 184 err(1, "sendfile"); 185 186 return; 187} 188 189int 190main(int argc, char **argv) 191{ 192 pid_t pid; 193 194 if (argc != 4) { 195 fprintf(stderr, "Usage: %s <inputFile outputFile portNumber\n", 196 argv[0]); 197 return (1); 198 } 199 inputFile = argv[1]; 200 outputFile = argv[2]; 201 port = atoi(argv[3]); 202 203 if ((pid = fork()) == 0) { 204 writer(); 205 exit(EXIT_SUCCESS); 206 } else if (pid > 0) { 207 reader(); 208 kill(pid, SIGINT); 209 } else 210 err(1, "fork(), %s:%d", __FILE__, __LINE__); 211 212 return (0); 213} 214