1#!/bin/sh 2 3# 4# Copyright (c) 2012 Peter Holm <pho@FreeBSD.org> 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 with read/write length of INT_MAX (i386) or INT_MAX+1 (amd64) 30 31. ../default.cfg 32 33[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 34 35odir=`pwd` 36cd /tmp 37sed '1,/^EOF/d' < $odir/$0 > rdwr.c 38mycc -o rdwr -Wall rdwr.c || exit 39rm -f rdwr.c 40 41oldclamp=`sysctl debug.devfs_iosize_max_clamp 2>/dev/null | 42 awk '{print $NF}'` 43if [ `uname -m` = amd64 ]; then 44 [ "$oldclamp" = "1" ] && sysctl debug.devfs_iosize_max_clamp=0 45fi 46for j in `jot 10`; do 47 /tmp/rdwr || { echo FAIL; break; } 48done 49if [ `uname -m` = amd64 ]; then 50 [ "$oldclamp" = "1" ] && sysctl debug.devfs_iosize_max_clamp=1 51fi 52 53rm -f /tmp/rdwr 54exit 55EOF 56#include <sys/types.h> 57#include <sys/limits.h> 58#include <sys/mman.h> 59#include <sys/uio.h> 60#include <err.h> 61#include <fcntl.h> 62#include <unistd.h> 63 64int 65main(int argc, char **argv) 66{ 67 int fd1, fd2; 68 size_t len; 69 void *p; 70 struct iovec iov; 71 72 alarm(120); 73 if ((fd1 = open("/dev/null", O_RDWR, 0)) == -1) 74 err(1, "open /dev/null"); 75 76 if ((fd2 = open("/dev/zero", O_RDWR)) == -1) 77 err(1, "open /dev/zero"); 78 79 if (sizeof(size_t) == sizeof(int32_t)) 80 len = (size_t)INT_MAX; /* i386 */ 81 else 82 len = (size_t)INT_MAX + 1; /* amd64 */ 83 84 if ((p = mmap(0, len, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd2, 0)) == 85 MAP_FAILED) 86 err(1, "mmap"); 87 88 if (read(fd2, p, len) != len) 89 err(1, "read"); 90 91 if (write(fd1, p, len) != len) 92 err(1, "write"); 93 94 if (pread(fd2, p, len, 0) != len) 95 err(1, "pread"); 96 97 if (pwrite(fd1, p, len, 0) != len) 98 err(1, "pwrite"); 99 100 iov.iov_base = p; 101 iov.iov_len = len; 102 if (readv(fd2, &iov, 1) != len) 103 err(1, "readv"); 104 105 if (writev(fd1, &iov, 1) != len) 106 err(1, "writev"); 107 108 if (preadv(fd2, &iov, 1, 0) != len) 109 err(1, "preadv"); 110 111 if (pwritev(fd1, &iov, 1, 0) != len) 112 err(1, "pwritev"); 113 114 close(fd1); 115 close(fd2); 116 117 return (0); 118} 119