1#!/bin/sh 2 3# 4# Copyright (c) 2011 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 deadlock (processes stuck in sfbufa) 30 31# Variation of sendfile.sh 32# kern.ipc.nsfbufs should be low for this test 33 34. ../default.cfg 35 36odir=`pwd` 37 38cd /tmp 39sed '1,/^EOF/d' < $odir/$0 > sendfile3.c 40mycc -o sendfile3 -Wall -Wextra sendfile3.c 41rm -f sendfile3.c 42[ -d "$RUNDIR" ] || mkdir -p $RUNDIR 43cd $RUNDIR 44 45in=inputFile 46out=outputFile 47parallel=20 48 49for i in 50m 100m; do 50 rm -f $in 51 dd if=/dev/random of=$in bs=$i count=1 status=none 52 for j in `jot $parallel`; do 53 rm -f ${out}$j 54 /tmp/sendfile3 $in ${out}$j 1234$j & 55 done 56 wait 57 for j in `jot $parallel`; do 58 rm -f ${out}$j 59 done 60done 61rm -f $in /tmp/sendfile3 62exit 63EOF 64#include <sys/param.h> 65#include <sys/socket.h> 66#include <sys/stat.h> 67#include <sys/wait.h> 68 69#include <netinet/in.h> 70 71#include <err.h> 72#include <fcntl.h> 73#include <netdb.h> 74#include <signal.h> 75#include <stdio.h> 76#include <stdlib.h> 77#include <string.h> 78#include <unistd.h> 79 80int port; 81char *inputFile; 82char *outputFile; 83int bufsize = 4096; 84 85static void 86reader(void) { 87 int tcpsock, msgsock; 88 int on; 89 socklen_t len; 90 struct sockaddr_in inetaddr, inetpeer; 91 int n, t, *buf, fd; 92 93 on = 1; 94 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) 95 err(1, "socket(), %s:%d", __FILE__, __LINE__); 96 97 if (setsockopt(tcpsock, 98 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 99 err(1, "setsockopt(), %s:%d", __FILE__, __LINE__); 100 101 inetaddr.sin_family = AF_INET; 102 inetaddr.sin_addr.s_addr = INADDR_ANY; 103 inetaddr.sin_port = htons(port); 104 inetaddr.sin_len = sizeof(inetaddr); 105 106 if (bind(tcpsock, 107 (struct sockaddr *)&inetaddr, sizeof (inetaddr)) < 0) 108 err(1, "bind(), %s:%d", __FILE__, __LINE__); 109 110 if (listen(tcpsock, 5) < 0) 111 err(1, "listen(), %s:%d", __FILE__, __LINE__); 112 113 len = sizeof(inetpeer); 114 if ((msgsock = accept(tcpsock, 115 (struct sockaddr *)&inetpeer, &len)) < 0) 116 err(1, "accept(), %s:%d", __FILE__, __LINE__); 117 118 t = 0; 119 if ((buf = malloc(bufsize)) == NULL) 120 err(1, "malloc(%d), %s:%d", bufsize, __FILE__, __LINE__); 121 122 if ((fd = open(outputFile, O_RDWR | O_CREAT | O_TRUNC, 0640)) == -1) 123 err(1, "open(%s)", outputFile); 124 125 for (;;) { 126 if ((n = read(msgsock, buf, bufsize)) < 0) 127 err(1, "read(), %s:%d", __FILE__, __LINE__); 128 t += n; 129 if (n == 0) break; 130 131 if ((write(fd, buf, n)) != n) 132 err(1, "write"); 133 } 134 close(msgsock); 135 close(fd); 136 return; 137} 138 139static void 140writer(void) { 141 int tcpsock, on; 142 struct sockaddr_in inetaddr; 143 struct hostent *hostent; 144 struct stat statb; 145 int i, r, fd; 146 off_t off = 0; 147 148 on = 1; 149 for (i = 0; i < 5; i++) { 150 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) 151 err(1, "socket(), %s:%d", __FILE__, __LINE__); 152 153 if (setsockopt(tcpsock, 154 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 155 err(1, "setsockopt(), %s:%d", __FILE__, __LINE__); 156 157 bzero((char *) &inetaddr, sizeof(inetaddr)); 158 hostent = gethostbyname ("localhost"); 159 memcpy (&inetaddr.sin_addr.s_addr, hostent->h_addr, 160 sizeof (struct in_addr)); 161 162 inetaddr.sin_family = AF_INET; 163 inetaddr.sin_port = htons(port); 164 inetaddr.sin_len = sizeof(inetaddr); 165 166 r = connect(tcpsock, (struct sockaddr *) &inetaddr, 167 sizeof(inetaddr)); 168 if (r == 0) 169 break; 170 sleep(1); 171 close(tcpsock); 172 } 173 if (r < 0) 174 err(1, "connect(), %s:%d", __FILE__, __LINE__); 175 176 if (stat(inputFile, &statb) != 0) 177 err(1, "stat(%s)", inputFile); 178 179 if ((fd = open(inputFile, O_RDONLY)) == -1) 180 err(1, "open(%s)", inputFile); 181 182 if (sendfile(fd, tcpsock, 0, statb.st_size, NULL, &off, 0) == -1) 183 err(1, "sendfile"); 184} 185 186int 187main(int argc, char **argv) 188{ 189 pid_t pid; 190 191 if (argc != 4) { 192 fprintf(stderr, "Usage: %s <inputFile outputFile portNumber\n", argv[0]); 193 return (1); 194 } 195 inputFile = argv[1]; 196 outputFile = argv[2]; 197 port = atoi(argv[3]); 198 199 if ((pid = fork()) == 0) { 200 writer(); 201 exit(EXIT_SUCCESS); 202 } else if (pid > 0) { 203 reader(); 204 kill(pid, SIGINT); 205 waitpid(pid, NULL, 0); 206 } else 207 err(1, "fork(), %s:%d", __FILE__, __LINE__); 208 209 return (0); 210} 211