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 57newfs $newfs_flags md$mdstart > /dev/null 58mount /dev/md$mdstart $mntpoint 59set +e 60 61cd $mntpoint 62dd if=/dev/random of=input bs=4k count=1 status=none 63(cd $odir/../testcases/swap; ./swap -t 5m -i 20 > /dev/null) & 64$dir/sendfile15 65s=$? 66while pgrep -q swap; do 67 pkill swap 68done 69wait 70[ -f sendfile15.core -a $s -eq 0 ] && 71 { ls -l sendfile15.core; mv sendfile15.core $dir; s=1; } 72cd $odir 73 74for i in `jot 6`; do 75 mount | grep -q "on $mntpoint " || break 76 umount $mntpoint && break || sleep 10 77 [ $i -eq 6 ] && 78 { echo FATAL; fstat -mf $mntpoint; exit 1; } 79done 80mdconfig -d -u $mdstart 81rm -rf $dir/sendfile15 82exit $s 83 84EOF 85#include <sys/param.h> 86#include <sys/fcntl.h> 87#include <sys/mman.h> 88#include <sys/socket.h> 89#include <sys/stat.h> 90#include <sys/stat.h> 91#include <sys/uio.h> 92#include <sys/wait.h> 93 94#include <machine/atomic.h> 95 96#include <err.h> 97#include <errno.h> 98#include <fcntl.h> 99#include <stdio.h> 100#include <stdlib.h> 101#include <time.h> 102#include <unistd.h> 103 104static volatile u_int *share; 105 106#define PARALLEL 128 107#define RUNTIME (5 * 60) 108#define SYNC 0 109 110static void 111test(void) 112{ 113 struct stat st; 114 off_t written, pos; 115 int child, error, from, n, status, sv[2]; 116 char *buf; 117 const char *from_name; 118 119 atomic_add_int(&share[SYNC], 1); 120 while (share[SYNC] != PARALLEL) 121 ; 122 123 from_name = "input"; 124 125 if ((from = open(from_name, O_RDONLY)) == -1) 126 err(1, "open read %s", from_name); 127 128 if ((error = fstat(from, &st)) == -1) 129 err(1, "stat %s", from_name); 130 131 if ((error = socketpair(AF_UNIX, SOCK_STREAM, 0, sv)) == -1) 132 err(1, "socketpair"); 133 134 child = fork(); 135 if (child == -1) 136 err(1, "fork"); 137 else if (child != 0) { 138 setproctitle("parent"); 139 close(sv[1]); 140 pos = 0; 141 for (;;) { 142 error = sendfile(from, sv[0], pos, st.st_size - pos, 143 NULL, &written, 0); 144 if (error == -1) { 145 if (errno != EAGAIN) 146 err(1, "sendfile"); 147 } 148 pos += written; 149 if (pos == st.st_size) 150 break; 151 } 152 close(sv[0]); 153 if (waitpid(child, &status, 0) != child) 154 err(1, "waitpid(%d)", child); 155 } else { 156 setproctitle("child"); 157 close(sv[0]); 158 buf = malloc(st.st_size); 159 if (buf == NULL) 160 err(1, "malloc %jd", st.st_size); 161 pos = 0; 162 for (;;) { 163 written = st.st_size - pos; 164 n = read(sv[1], buf + pos, written); 165 if (n == -1) 166 err(1, "read"); 167 else if (n == 0) 168 errx(1, "Short read"); 169 pos += n; 170 if (pos == st.st_size) 171 break; 172 } 173 close(sv[1]); 174 _exit(0); 175 } 176 177 _exit(0); 178} 179 180int 181main(void) 182{ 183 pid_t pids[PARALLEL]; 184 size_t len; 185 time_t start; 186 int e, i, status; 187 188 e = 0; 189 len = PAGE_SIZE; 190 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 191 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 192 err(1, "mmap"); 193 194 start = time(NULL); 195 while ((time(NULL) - start) < RUNTIME && e == 0) { 196 share[SYNC] = 0; 197 for (i = 0; i < PARALLEL; i++) { 198 if ((pids[i] = fork()) == 0) 199 test(); 200 if (pids[i] == -1) 201 err(1, "fork()"); 202 } 203 for (i = 0; i < PARALLEL; i++) { 204 if (waitpid(pids[i], &status, 0) == -1) 205 err(1, "waitpid(%d)", pids[i]); 206 if (status != 0) { 207 if (WIFSIGNALED(status)) 208 fprintf(stderr, 209 "pid %d exit signal %d\n", 210 pids[i], WTERMSIG(status)); 211 } 212 e += status == 0 ? 0 : 1; 213 } 214 } 215 216 return (e); 217} 218