1*8a272653SPeter Holm#!/bin/sh 2*8a272653SPeter Holm 3*8a272653SPeter Holm# 4*8a272653SPeter Holm# Copyright (c) 2016 EMC Corp. 5*8a272653SPeter Holm# All rights reserved. 6*8a272653SPeter Holm# 7*8a272653SPeter Holm# Redistribution and use in source and binary forms, with or without 8*8a272653SPeter Holm# modification, are permitted provided that the following conditions 9*8a272653SPeter Holm# are met: 10*8a272653SPeter Holm# 1. Redistributions of source code must retain the above copyright 11*8a272653SPeter Holm# notice, this list of conditions and the following disclaimer. 12*8a272653SPeter Holm# 2. Redistributions in binary form must reproduce the above copyright 13*8a272653SPeter Holm# notice, this list of conditions and the following disclaimer in the 14*8a272653SPeter Holm# documentation and/or other materials provided with the distribution. 15*8a272653SPeter Holm# 16*8a272653SPeter Holm# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17*8a272653SPeter Holm# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18*8a272653SPeter Holm# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19*8a272653SPeter Holm# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20*8a272653SPeter Holm# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21*8a272653SPeter Holm# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22*8a272653SPeter Holm# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23*8a272653SPeter Holm# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24*8a272653SPeter Holm# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25*8a272653SPeter Holm# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26*8a272653SPeter Holm# SUCH DAMAGE. 27*8a272653SPeter Holm# 28*8a272653SPeter Holm 29*8a272653SPeter Holm# Test parallel read access to /dev. 30*8a272653SPeter Holm 31*8a272653SPeter Holm# "panic: Most recently used by DEVFS1" seen. 32*8a272653SPeter Holm# https://people.freebsd.org/~pho/stress/log/dev.txt 33*8a272653SPeter Holm# Fixed by r293826. 34*8a272653SPeter Holm 35*8a272653SPeter Holm[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 36*8a272653SPeter Holm 37*8a272653SPeter Holm. ../default.cfg 38*8a272653SPeter Holm 39*8a272653SPeter Holmhere=`pwd` 40*8a272653SPeter Holmcd /tmp 41*8a272653SPeter Holmsed '1,/^EOF/d' < $here/$0 > dev.c 42*8a272653SPeter Holmmycc -o dev -Wall -Wextra -O2 dev.c || exit 1 43*8a272653SPeter Holmrm -f dev.c 44*8a272653SPeter Holm 45*8a272653SPeter Holmecho "Expect: g_access(958): provider ufsid/5c581221fcac7d80 has error 6 set" 46*8a272653SPeter Holmdaemon sh -c \ 47*8a272653SPeter Holm "(cd $here/../testcases/swap; ./swap -t 6m -i 20 -k -l 100)" > \ 48*8a272653SPeter Holm /dev/null 49*8a272653SPeter Holm 50*8a272653SPeter Holm/tmp/dev # Note: this runs as root. 51*8a272653SPeter Holms=$? 52*8a272653SPeter Holm 53*8a272653SPeter Holmwhile pkill -9 swap; do 54*8a272653SPeter Holm : 55*8a272653SPeter Holmdone 56*8a272653SPeter Holm 57*8a272653SPeter Holmrm -f /tmp/dev 58*8a272653SPeter Holmexit $s 59*8a272653SPeter HolmEOF 60*8a272653SPeter Holm#include <sys/types.h> 61*8a272653SPeter Holm#include <sys/wait.h> 62*8a272653SPeter Holm 63*8a272653SPeter Holm#include <err.h> 64*8a272653SPeter Holm#include <errno.h> 65*8a272653SPeter Holm#include <fcntl.h> 66*8a272653SPeter Holm#include <fts.h> 67*8a272653SPeter Holm#include <stdlib.h> 68*8a272653SPeter Holm#include <stdio.h> 69*8a272653SPeter Holm#include <string.h> 70*8a272653SPeter Holm#include <time.h> 71*8a272653SPeter Holm#include <unistd.h> 72*8a272653SPeter Holm 73*8a272653SPeter Holm#define PARALLEL 4 74*8a272653SPeter Holm#define RUNTIME 300 75*8a272653SPeter Holm 76*8a272653SPeter Holmchar path[80]; 77*8a272653SPeter Holm 78*8a272653SPeter Holmvoid 79*8a272653SPeter Holmchurn(char *path) 80*8a272653SPeter Holm{ 81*8a272653SPeter Holm FTS *fts; 82*8a272653SPeter Holm FTSENT *p; 83*8a272653SPeter Holm time_t start; 84*8a272653SPeter Holm int fd, ftsoptions; 85*8a272653SPeter Holm char *args[2]; 86*8a272653SPeter Holm 87*8a272653SPeter Holm ftsoptions = FTS_PHYSICAL; 88*8a272653SPeter Holm args[0] = path; 89*8a272653SPeter Holm args[1] = 0; 90*8a272653SPeter Holm 91*8a272653SPeter Holm start = time(NULL); 92*8a272653SPeter Holm while (time(NULL) - start < RUNTIME) { 93*8a272653SPeter Holm if ((fts = fts_open(args, ftsoptions, NULL)) == NULL) 94*8a272653SPeter Holm err(1, "fts_open"); 95*8a272653SPeter Holm 96*8a272653SPeter Holm while ((p = fts_read(fts)) != NULL) { 97*8a272653SPeter Holm if (p->fts_info == FTS_D || 98*8a272653SPeter Holm p->fts_info == FTS_DP) 99*8a272653SPeter Holm continue; 100*8a272653SPeter Holm if (strstr(p->fts_path, "ttyu") != NULL) 101*8a272653SPeter Holm continue; 102*8a272653SPeter Holm if (strstr(p->fts_path, "fcdm") != NULL) 103*8a272653SPeter Holm continue; 104*8a272653SPeter Holm if ((fd = open(p->fts_path, O_RDONLY|O_NONBLOCK)) == -1) 105*8a272653SPeter Holm continue; 106*8a272653SPeter Holm usleep(arc4random() % 1000); 107*8a272653SPeter Holm close(fd); 108*8a272653SPeter Holm 109*8a272653SPeter Holm } 110*8a272653SPeter Holm 111*8a272653SPeter Holm if (errno != 0 && errno != ENOENT) 112*8a272653SPeter Holm warn("fts_read"); 113*8a272653SPeter Holm if (fts_close(fts) == -1) 114*8a272653SPeter Holm err(1, "fts_close()"); 115*8a272653SPeter Holm } 116*8a272653SPeter Holm 117*8a272653SPeter Holm _exit(0); 118*8a272653SPeter Holm} 119*8a272653SPeter Holm 120*8a272653SPeter Holmint 121*8a272653SPeter Holmmain(void) 122*8a272653SPeter Holm{ 123*8a272653SPeter Holm int e, i, status;; 124*8a272653SPeter Holm 125*8a272653SPeter Holm e = 0; 126*8a272653SPeter Holm for (i = 0; i < PARALLEL; i++) 127*8a272653SPeter Holm if (fork() == 0) 128*8a272653SPeter Holm churn("/dev"); 129*8a272653SPeter Holm 130*8a272653SPeter Holm for (i = 0; i < PARALLEL; i++) { 131*8a272653SPeter Holm wait(&status); 132*8a272653SPeter Holm if (status != 0) 133*8a272653SPeter Holm e++; 134*8a272653SPeter Holm } 135*8a272653SPeter Holm 136*8a272653SPeter Holm return (e); 137*8a272653SPeter Holm} 138