1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2018 Dell EMC Isilon 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# sendfile() over socket pairs test. 31 32# Page fault in unp_dispose+0x90 seen: 33# https://people.freebsd.org/~pho/stress/log/sendfile15.txt 34 35# "panic: bad pte va 800657000 pte 0" seen: 36# https://people.freebsd.org/~pho/stress/log/sendfile15-2.txt 37 38# "panic: vm_page_free_prep 0xfffff817e0efac10 PG_ZERO 87 ...": 39# https://people.freebsd.org/~pho/stress/log/sendfile15-2.txt 40# Note that r334783 seems to alleviate the problem. 41 42. ../default.cfg 43[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1 44 45dir=/tmp 46odir=`pwd` 47cd $dir 48sed '1,/^EOF/d' < $odir/$0 > $dir/sendfile15.c 49mycc -o sendfile15 -Wall -Wextra -O0 -g sendfile15.c || exit 1 50rm -f sendfile15.c 51cd $odir 52 53set -e 54mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint 55[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart 56mdconfig -a -t swap -s 2g -u $mdstart 57bsdlabel -w md$mdstart auto 58newfs $newfs_flags md${mdstart}$part > /dev/null 59mount /dev/md${mdstart}$part $mntpoint 60set +e 61 62cd $mntpoint 63dd if=/dev/random of=input bs=4k count=1 status=none 64(cd $odir/../testcases/swap; ./swap -t 5m -i 20 > /dev/null) & 65$dir/sendfile15 66s=$? 67while pgrep -q swap; do 68 pkill swap 69done 70wait 71[ -f sendfile15.core -a $s -eq 0 ] && 72 { ls -l sendfile15.core; mv sendfile15.core $dir; s=1; } 73cd $odir 74 75for i in `jot 6`; do 76 mount | grep -q "on $mntpoint " || break 77 umount $mntpoint && break || sleep 10 78 [ $i -eq 6 ] && 79 { echo FATAL; fstat -mf $mntpoint; exit 1; } 80done 81mdconfig -d -u $mdstart 82rm -rf $dir/sendfile15 83exit $s 84 85EOF 86#include <sys/param.h> 87#include <sys/fcntl.h> 88#include <sys/mman.h> 89#include <sys/socket.h> 90#include <sys/stat.h> 91#include <sys/stat.h> 92#include <sys/uio.h> 93#include <sys/wait.h> 94 95#include <machine/atomic.h> 96 97#include <err.h> 98#include <errno.h> 99#include <fcntl.h> 100#include <stdio.h> 101#include <stdlib.h> 102#include <time.h> 103#include <unistd.h> 104 105static volatile u_int *share; 106 107#define PARALLEL 128 108#define RUNTIME (5 * 60) 109#define SYNC 0 110 111static void 112test(void) 113{ 114 struct stat st; 115 off_t written, pos; 116 int child, error, from, n, status, sv[2]; 117 char *buf; 118 const char *from_name; 119 120 atomic_add_int(&share[SYNC], 1); 121 while (share[SYNC] != PARALLEL) 122 ; 123 124 from_name = "input"; 125 126 if ((from = open(from_name, O_RDONLY)) == -1) 127 err(1, "open read %s", from_name); 128 129 if ((error = fstat(from, &st)) == -1) 130 err(1, "stat %s", from_name); 131 132 if ((error = socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) == -1) 133 err(1, "socketpair"); 134 135 child = fork(); 136 if (child == -1) 137 err(1, "fork"); 138 else if (child != 0) { 139 setproctitle("parent"); 140 close(sv[1]); 141 pos = 0; 142 for (;;) { 143 error = sendfile(from, sv[0], pos, st.st_size - pos, 144 NULL, &written, 0); 145 if (error == -1) { 146 if (errno != EAGAIN) 147 err(1, "sendfile"); 148 } 149 pos += written; 150 if (pos == st.st_size) 151 break; 152 } 153 close(sv[0]); 154 if (waitpid(child, &status, 0) != child) 155 err(1, "waitpid(%d)", child); 156 } else { 157 setproctitle("child"); 158 close(sv[0]); 159 buf = malloc(st.st_size); 160 if (buf == NULL) 161 err(1, "malloc %jd", st.st_size); 162 pos = 0; 163 for (;;) { 164 written = st.st_size - pos; 165 n = read(sv[1], buf + pos, written); 166 if (n == -1) 167 err(1, "read"); 168 else if (n == 0) 169 errx(1, "Short read"); 170 pos += n; 171 if (pos == st.st_size) 172 break; 173 } 174 close(sv[1]); 175 _exit(0); 176 } 177 178 _exit(0); 179} 180 181int 182main(void) 183{ 184 pid_t pids[PARALLEL]; 185 size_t len; 186 time_t start; 187 int e, i, status; 188 189 e = 0; 190 len = PAGE_SIZE; 191 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 192 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 193 err(1, "mmap"); 194 195 start = time(NULL); 196 while ((time(NULL) - start) < RUNTIME && e == 0) { 197 share[SYNC] = 0; 198 for (i = 0; i < PARALLEL; i++) { 199 if ((pids[i] = fork()) == 0) 200 test(); 201 if (pids[i] == -1) 202 err(1, "fork()"); 203 } 204 for (i = 0; i < PARALLEL; i++) { 205 if (waitpid(pids[i], &status, 0) == -1) 206 err(1, "waitpid(%d)", pids[i]); 207 if (status != 0) { 208 if (WIFSIGNALED(status)) 209 fprintf(stderr, 210 "pid %d exit signal %d\n", 211 pids[i], WTERMSIG(status)); 212 } 213 e += status == 0 ? 0 : 1; 214 } 215 } 216 217 return (e); 218} 219