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# $FreeBSD$ 29# 30 31# Test scenario for sendfile livelock seen on 7.2-STABLE for non SMP 32 33# Scenario by kib@ 34 35. ../default.cfg 36 37odir=`pwd` 38 39cd /tmp 40sed '1,/^EOF/d' < $odir/$0 > sendfile.c 41cc -o sendfile -Wall sendfile.c -pthread 42rm -f sendfile.c 43[ -d "$RUNDIR" ] || mkdir -p $RUNDIR 44cd $RUNDIR 45 46in=/tmp/inputFile 47out=/tmp/outputFile 48 49for i in 1 2 3 4 8 16 1k 2k 3k 4k 5k 1m 2m 3m 4m 5m ; do 50 rm -f $in $out 51 dd if=/dev/random of=$in bs=$i count=1 2>&1 | \ 52 egrep -v "records|transferred" 53 /tmp/sendfile $in $out 12345 54 cmp $in $out || ls -l $in $out 55 rm -f $in $out 56done 57rm -f /tmp/sendfile 58exit 59EOF 60#include <err.h> 61#include <fcntl.h> 62#include <netdb.h> 63#include <netinet/in.h> 64#include <signal.h> 65#include <stdio.h> 66#include <stdlib.h> 67#include <string.h> 68#include <sys/param.h> 69#include <sys/socket.h> 70#include <sys/stat.h> 71#include <unistd.h> 72 73int port; 74char *inputFile; 75char *outputFile; 76int bufsize = 4096; 77 78static void 79reader(void) { 80 int tcpsock, msgsock; 81 int on; 82 socklen_t len; 83 struct sockaddr_in inetaddr, inetpeer; 84 int n, t, *buf, fd; 85 86 on = 1; 87 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) 88 err(1, "socket(), %s:%d", __FILE__, __LINE__); 89 90 if (setsockopt(tcpsock, 91 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 92 err(1, "setsockopt(), %s:%d", __FILE__, __LINE__); 93 94 inetaddr.sin_family = AF_INET; 95 inetaddr.sin_addr.s_addr = INADDR_ANY; 96 inetaddr.sin_port = htons(port); 97 inetaddr.sin_len = sizeof(inetaddr); 98 99 if (bind(tcpsock, 100 (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) 101 err(1, "bind(), %s:%d", __FILE__, __LINE__); 102 103 if (listen(tcpsock, 5) < 0) 104 err(1, "listen(), %s:%d", __FILE__, __LINE__); 105 106 len = sizeof(inetpeer); 107 if ((msgsock = accept(tcpsock, 108 (struct sockaddr *)&inetpeer, &len)) < 0) 109 err(1, "accept(), %s:%d", __FILE__, __LINE__); 110 111 t = 0; 112 if ((buf = malloc(bufsize)) == NULL) 113 err(1, "malloc(%d), %s:%d", bufsize, __FILE__, __LINE__); 114 115 if ((fd = open(outputFile, O_RDWR | O_CREAT | O_TRUNC, 0640)) == -1) 116 err(1, "open(%s)", outputFile); 117 118 for (;;) { 119 if ((n = read(msgsock, buf, bufsize)) < 0) 120 err(1, "read(), %s:%d", __FILE__, __LINE__); 121 t += n; 122 if (n == 0) break; 123 124 if ((write(fd, buf, n)) != n) 125 err(1, "write"); 126 } 127 close(msgsock); 128 close(fd); 129 return; 130} 131 132static void 133writer(void) { 134 int tcpsock, on; 135 struct sockaddr_in inetaddr; 136 struct hostent *hostent; 137 struct stat statb; 138 int i, r, fd; 139 off_t off = 0; 140#if 1 141 size_t size; 142#endif 143 144 on = 1; 145 for (i = 1; i < 5; i++) { 146 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) 147 err(1, "socket(), %s:%d", __FILE__, __LINE__); 148 149 if (setsockopt(tcpsock, 150 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 151 err(1, "setsockopt(), %s:%d", __FILE__, __LINE__); 152 153#if 1 /* livelock trigger */ 154 size = getpagesize() -4; 155 if (setsockopt(tcpsock, 156 SOL_SOCKET, SO_SNDBUF, (void *)&size, sizeof(size)) < 0) 157 err(1, "setsockopt(SO_SNDBUF), %s:%d", __FILE__, __LINE__); 158#endif 159 160 hostent = gethostbyname ("localhost"); 161 memcpy (&inetaddr.sin_addr.s_addr, hostent->h_addr, 162 sizeof (struct in_addr)); 163 164 inetaddr.sin_family = AF_INET; 165 inetaddr.sin_addr.s_addr = INADDR_ANY; 166 inetaddr.sin_port = htons(port); 167 inetaddr.sin_len = sizeof(inetaddr); 168 169 r = connect(tcpsock, (struct sockaddr *) &inetaddr, 170 sizeof(inetaddr)); 171 if (r == 0) 172 break; 173 sleep(1); 174 close(tcpsock); 175 } 176 if (r < 0) 177 err(1, "connect(), %s:%d", __FILE__, __LINE__); 178 179 if (stat(inputFile, &statb) != 0) 180 err(1, "stat(%s)", inputFile); 181 182 if ((fd = open(inputFile, O_RDONLY)) == -1) 183 err(1, "open(%s)", inputFile); 184 185 if (sendfile(fd, tcpsock, 0, statb.st_size, NULL, &off, 0) == -1) 186 err(1, "sendfile"); 187 188 return; 189} 190 191int 192main(int argc, char **argv) 193{ 194 pid_t pid; 195 196 if (argc != 4) { 197 fprintf(stderr, "Usage: %s <inputFile outputFile portNumber\n", argv[0]); 198 return (1); 199 } 200 inputFile = argv[1]; 201 outputFile = argv[2]; 202 port = atoi(argv[3]); 203 204 if ((pid = fork()) == 0) { 205 writer(); 206 exit(EXIT_SUCCESS); 207 208 } else if (pid > 0) { 209 reader(); 210 kill(pid, SIGINT); 211 } else 212 err(1, "fork(), %s:%d", __FILE__, __LINE__); 213 214 return (0); 215} 216