1#!/bin/sh 2 3# 4# Copyright (c) 2016 EMC Corp. 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 parallel access to /dev. A non-root version. 30 31# "panic: Bad link elm 0xfffff8000b07ed00 prev->next != elm" seen. 32# https://people.freebsd.org/~pho/stress/log/dev2.txt 33 34# Fixed by r294204. 35 36# "panic: Assertion !tty_gone(tp) failed at ../sys/ttydevsw.h:165" seen: 37# https://people.freebsd.org/~pho/stress/log/dev2-2.txt 38 39[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 40 41. ../default.cfg 42 43kldstat -v | grep -q pty || { kldload pty || exit 0; } 44here=`pwd` 45cd /tmp 46sed '1,/^EOF/d' < $here/$0 > dev2.c 47mycc -o dev2 -Wall -Wextra -O2 dev2.c || exit 1 48rm -f dev2.c 49 50daemon sh -c \ 51 "(cd $here/../testcases/swap; ./swap -t 6m -i 20 -k -l 100)" > \ 52 /dev/null 53 54su $testuser -c /tmp/dev2 55 56while pkill -9 swap; do 57 : 58done 59 60rm -f /tmp/dev2 61exit 62EOF 63#include <sys/types.h> 64#include <sys/wait.h> 65 66#include <err.h> 67#include <errno.h> 68#include <fcntl.h> 69#include <fts.h> 70#include <setjmp.h> 71#include <signal.h> 72#include <stdio.h> 73#include <stdlib.h> 74#include <time.h> 75#include <unistd.h> 76 77#define PARALLEL 4 78#define RUNTIME 300 79 80jmp_buf jbuf; 81char path[80]; 82 83void 84handler(int i __unused) { 85 longjmp(jbuf, 1); 86} 87 88void 89churn(char *path) 90{ 91 FTS *fts; 92 FTSENT *p; 93 time_t start; 94 int fd, ftsoptions; 95 char *args[2]; 96 97 ftsoptions = FTS_PHYSICAL; 98 args[0] = path; 99 args[1] = 0; 100 101 start = time(NULL); 102 while (time(NULL) - start < RUNTIME) { 103 if ((fts = fts_open(args, ftsoptions, NULL)) == NULL) 104 err(1, "fts_open"); 105 106 (void)setjmp(jbuf); 107 ualarm(0, 0); 108 while ((p = fts_read(fts)) != NULL) { 109 if (p->fts_info == FTS_D || 110 p->fts_info == FTS_DP) 111 continue; 112 ualarm(500000, 0); 113 if ((fd = open(p->fts_path, arc4random() % (O_CLOEXEC << 2))) == -1) 114 continue; 115 ualarm(0, 0); 116 usleep(arc4random() % 1000); 117 close(fd); 118 119 } 120 121 if (errno != 0 && errno != ENOENT) 122 warn("fts_read"); 123 if (fts_close(fts) == -1) 124 err(1, "fts_close()"); 125 } 126 127 _exit(0); 128} 129 130int 131main(void) 132{ 133 int i; 134 135 signal(SIGALRM, handler); 136 for (i = 0; i < PARALLEL; i++) 137 if (fork() == 0) 138 churn("/dev"); 139 140 for (i = 0; i < PARALLEL; i++) 141 wait(NULL); 142 143 return (0); 144} 145