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# Seen: 32# rdwr: readv(). Expected 2147483648 (80000000), got -2147483648 (ffffffff80000000) bytes: No error: 0 33# rdwr: writev(). Expected 2147483648 (80000000), got -2147483648 (ffffffff80000000) bytes: No error: 0 34# Fixed by: 78101d437a92 35 36. ../default.cfg 37 38[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 39 40odir=`pwd` 41cd /tmp 42sed '1,/^EOF/d' < $odir/$0 > rdwr.c 43mycc -o rdwr -Wall rdwr.c || exit 44rm -f rdwr.c 45 46oldclamp=`sysctl debug.devfs_iosize_max_clamp 2>/dev/null | 47 awk '{print $NF}'` 48if [ `uname -m` = amd64 ]; then 49 [ "$oldclamp" = "1" ] && sysctl debug.devfs_iosize_max_clamp=0 50fi 51for j in `jot 10`; do 52 /tmp/rdwr || { echo FAIL; break; } 53done 54if [ `uname -m` = amd64 ]; then 55 [ "$oldclamp" = "1" ] && sysctl debug.devfs_iosize_max_clamp=1 56fi 57 58rm -f /tmp/rdwr 59exit 60EOF 61#include <sys/types.h> 62#include <sys/limits.h> 63#include <sys/mman.h> 64#include <sys/uio.h> 65#include <err.h> 66#include <fcntl.h> 67#include <unistd.h> 68 69static int s; 70 71static void 72er(char * syscall, size_t len, ssize_t ret) 73{ 74 warn("%8s. Expected %zu (%zx), got %zd (%zx) bytes", 75 syscall, len, len, ret, ret); 76 s=1; 77} 78 79int 80main(int argc, char **argv) 81{ 82 int fd1, fd2; 83 size_t len; 84 ssize_t r; 85 void *p; 86 struct iovec iov; 87 88 alarm(120); 89 if ((fd1 = open("/dev/null", O_RDWR, 0)) == -1) 90 err(1, "open /dev/null"); 91 92 if ((fd2 = open("/dev/zero", O_RDWR)) == -1) 93 err(1, "open /dev/zero"); 94 95 if (sizeof(size_t) == sizeof(int32_t)) 96 len = (size_t)INT_MAX; /* i386 */ 97 else 98 len = (size_t)INT_MAX + 1; /* amd64 */ 99 100 if ((p = mmap(0, len, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd2, 0)) == 101 MAP_FAILED) 102 err(1, "mmap"); 103 104 if ((r = read(fd2, p, len)) != len) 105 er("read()", len, r); 106 107 if ((r = write(fd1, p, len)) != len) 108 er("write()", len, r); 109 110 if ((r = pread(fd2, p, len, 0)) != len) 111 er("pread()", len, r); 112 113 if ((r = pwrite(fd1, p, len, 0)) != len) 114 er("pwrite()", len, r); 115 116 iov.iov_base = p; 117 iov.iov_len = len; 118 if ((r = readv(fd2, &iov, 1)) != len) 119 er("readv()", len, r); 120 121 if ((r = writev(fd1, &iov, 1)) != len) 122 er("writev()", len, r); 123 124 if ((r = preadv(fd2, &iov, 1, 0)) != len) 125 er("preadv()", len, r); 126 127 if ((r = pwritev(fd1, &iov, 1, 0)) != len) 128 er("pwritev()", len, r); 129 130 close(fd1); 131 close(fd2); 132 133 return (s); 134} 135