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, *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 if ((buf = malloc(bufsize)) == NULL) 119 err(1, "malloc(%d), %s:%d", bufsize, __FILE__, __LINE__); 120 121 if ((fd = open(outputFile, O_RDWR | O_CREAT | O_TRUNC, 0640)) == -1) 122 err(1, "open(%s)", outputFile); 123 124 for (;;) { 125 if ((n = read(msgsock, buf, bufsize)) < 0) 126 err(1, "read(), %s:%d", __FILE__, __LINE__); 127 if (n == 0) break; 128 129 if ((write(fd, buf, n)) != n) 130 err(1, "write"); 131 } 132 close(msgsock); 133 close(fd); 134 return; 135} 136 137static void 138writer(void) { 139 int tcpsock, on; 140 struct sockaddr_in inetaddr; 141 struct hostent *hostent; 142 struct stat statb; 143 int i, r, fd; 144 off_t off = 0; 145 146 on = 1; 147 for (i = 0; i < 5; i++) { 148 if ((tcpsock = socket(AF_INET, SOCK_STREAM, 0)) < 0) 149 err(1, "socket(), %s:%d", __FILE__, __LINE__); 150 151 if (setsockopt(tcpsock, 152 SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof(on)) < 0) 153 err(1, "setsockopt(), %s:%d", __FILE__, __LINE__); 154 155 bzero((char *) &inetaddr, sizeof(inetaddr)); 156 hostent = gethostbyname ("localhost"); 157 memcpy (&inetaddr.sin_addr.s_addr, hostent->h_addr, 158 sizeof (struct in_addr)); 159 160 inetaddr.sin_family = AF_INET; 161 inetaddr.sin_port = htons(port); 162 inetaddr.sin_len = sizeof(inetaddr); 163 164 r = connect(tcpsock, (struct sockaddr *) &inetaddr, 165 sizeof(inetaddr)); 166 if (r == 0) 167 break; 168 sleep(1); 169 close(tcpsock); 170 } 171 if (r < 0) 172 err(1, "connect(), %s:%d", __FILE__, __LINE__); 173 174 if (stat(inputFile, &statb) != 0) 175 err(1, "stat(%s)", inputFile); 176 177 if ((fd = open(inputFile, O_RDONLY)) == -1) 178 err(1, "open(%s)", inputFile); 179 180 if (sendfile(fd, tcpsock, 0, statb.st_size, NULL, &off, 0) == -1) 181 err(1, "sendfile"); 182} 183 184int 185main(int argc, char **argv) 186{ 187 pid_t pid; 188 189 if (argc != 4) { 190 fprintf(stderr, "Usage: %s <inputFile outputFile portNumber\n", argv[0]); 191 return (1); 192 } 193 inputFile = argv[1]; 194 outputFile = argv[2]; 195 port = atoi(argv[3]); 196 197 if ((pid = fork()) == 0) { 198 writer(); 199 exit(EXIT_SUCCESS); 200 } else if (pid > 0) { 201 reader(); 202 kill(pid, SIGINT); 203 waitpid(pid, NULL, 0); 204 } else 205 err(1, "fork(), %s:%d", __FILE__, __LINE__); 206 207 return (0); 208} 209