1#!/bin/sh 2 3# 4# Copyright (c) 2017 Dell EMC Isilon 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# tmpfs(4) option nonc test scenario 30 31. ../default.cfg 32[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 33 34dir=/tmp 35odir=`pwd` 36cd $dir 37sed '1,/^EOF/d' < $odir/$0 > $dir/tmpfs17.c 38mycc -o tmpfs17 -Wall -Wextra -O0 -g tmpfs17.c || exit 1 39rm -f tmpfs17.c 40cd $odir 41 42mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint 43mount -o nonc -t tmpfs tmpfs $mntpoint || { rm /tmp/tmpfs17; exit 0; } 44 45cd $mntpoint 46/tmp/tmpfs17 & 47pid=$! 48sleep .2 49pid2=`pgrep tmpfs17` 50for i in `jot 5`; do 51 for p in $pid2; do 52 while true; do procstat -f $p > /dev/null 2>&1; done & 53 pids="$pids $!" 54 done 55done 56while kill -0 $pid 2>/dev/null; do 57 sleep 2 58done 59kill $pids 2>/dev/null 60wait 61cd $odir 62 63for i in `jot 10`; do 64 umount $mntpoint && break 65 sleep 1 66done 67s=0 68mount | grep -q "on $mntpoint " && { s=1; umount -f $mntpoint; } 69rm -rf /tmp/tmpfs17 70exit $s 71 72EOF 73#include <sys/param.h> 74#include <sys/mman.h> 75#include <sys/stat.h> 76#include <sys/wait.h> 77 78#include <machine/atomic.h> 79 80#include <err.h> 81#include <errno.h> 82#include <fcntl.h> 83#include <stdio.h> 84#include <stdlib.h> 85#include <time.h> 86#include <unistd.h> 87 88static volatile u_int *share; 89 90#define PARALLEL 4 91#define RUNTIME (5 * 60) 92#define SYNC 0 93 94static void 95test(void) 96{ 97 pid_t pid; 98 time_t start; 99 int fd, i; 100 char file[80]; 101 102 atomic_add_int(&share[SYNC], 1); 103 while (share[SYNC] != PARALLEL) 104 ; 105 106 i= 0; 107 pid = getpid(); 108 start = time(NULL); 109 while ((time(NULL) - start) < RUNTIME) { 110 snprintf(file, sizeof(file), "file.%06d.%03d", pid, i++); 111 if ((fd = open(file, O_RDWR|O_CREAT, DEFFILEMODE)) == -1) 112 err(1, "open(%s)", file); 113 close(fd); 114 if (unlink(file) == -1) 115 err(1, "unlink(%s)", file); 116 } 117 118 _exit(0); 119} 120 121int 122main(void) 123{ 124 size_t len; 125 int e, i, pids[PARALLEL], status; 126 127 e = 0; 128 len = PAGE_SIZE; 129 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 130 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 131 err(1, "mmap"); 132 133 for (i = 0; i < PARALLEL; i++) { 134 if ((pids[i] = fork()) == 0) 135 test(); 136 } 137 for (i = 0; i < PARALLEL; i++) { 138 if (waitpid(pids[i], &status, 0) == -1) 139 err(1, "waitpid(%d)", pids[i]); 140 e += status == 0 ? 0 : 1; 141 } 142 143 return (e); 144} 145