1/*- 2 * Copyright (C) 2005 IronPort Systems, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD: stable/11/tests/sys/aio/aio_kqueue_test.c 326677 2017-12-08 05:20:54Z asomers $ 26 */ 27 28/* 29 * Prerequisities: 30 * - AIO support must be compiled into the kernel (see sys/<arch>/NOTES for 31 * more details). 32 * 33 * Note: it is a good idea to run this against a physical drive to 34 * exercise the physio fast path (ie. aio_kqueue /dev/<something safe>) 35 */ 36 37#include <sys/types.h> 38#include <sys/event.h> 39#include <sys/time.h> 40#include <aio.h> 41#include <err.h> 42#include <errno.h> 43#include <fcntl.h> 44#include <stdlib.h> 45#include <stdio.h> 46#include <string.h> 47#include <unistd.h> 48 49#include "freebsd_test_suite/macros.h" 50#include "local.h" 51 52#define PATH_TEMPLATE "aio.XXXXXXXXXX" 53 54#define MAX_RUNS 300 55/* #define DEBUG */ 56 57int 58main (int argc, char *argv[]) 59{ 60 struct aiocb **iocb, *kq_iocb; 61 char *file, pathname[sizeof(PATH_TEMPLATE)+1]; 62 struct kevent ke, kq_returned; 63 struct timespec ts; 64 char buffer[32768]; 65 int max_queue_per_proc; 66 size_t max_queue_per_proc_size; 67#ifdef DEBUG 68 int cancel, error; 69#endif 70 int failed = 0, fd, kq, pending, result, run; 71 int tmp_file = 0; 72 int i, j; 73 74 PLAIN_REQUIRE_KERNEL_MODULE("aio", 0); 75 PLAIN_REQUIRE_UNSAFE_AIO(0); 76 77 max_queue_per_proc_size = sizeof(max_queue_per_proc); 78 if (sysctlbyname("vfs.aio.max_aio_queue_per_proc", 79 &max_queue_per_proc, &max_queue_per_proc_size, NULL, 0) != 0) 80 err(1, "sysctlbyname"); 81 iocb = calloc(max_queue_per_proc, sizeof(struct aiocb*)); 82 if (iocb == NULL) 83 err(1, "calloc"); 84 85 kq = kqueue(); 86 if (kq < 0) { 87 perror("No kqeueue\n"); 88 exit(1); 89 } 90 91 if (argc == 1) { 92 strcpy(pathname, PATH_TEMPLATE); 93 fd = mkstemp(pathname); 94 file = pathname; 95 tmp_file = 1; 96 } else { 97 file = argv[1]; 98 fd = open(file, O_RDWR|O_CREAT, 0666); 99 } 100 if (fd == -1) 101 err(1, "Can't open %s\n", file); 102 103 for (run = 0; run < MAX_RUNS; run++){ 104#ifdef DEBUG 105 printf("Run %d\n", run); 106#endif 107 for (i = 0; i < max_queue_per_proc; i++) { 108 iocb[i] = (struct aiocb *)calloc(1, 109 sizeof(struct aiocb)); 110 if (iocb[i] == NULL) 111 err(1, "calloc"); 112 } 113 114 pending = 0; 115 for (i = 0; i < max_queue_per_proc; i++) { 116 pending++; 117 iocb[i]->aio_nbytes = sizeof(buffer); 118 iocb[i]->aio_buf = buffer; 119 iocb[i]->aio_fildes = fd; 120 iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run; 121 122 iocb[i]->aio_sigevent.sigev_notify_kqueue = kq; 123 iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i]; 124 iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT; 125 126 result = aio_write(iocb[i]); 127 if (result != 0) { 128 perror("aio_write"); 129 printf("Result %d iteration %d\n", result, i); 130 exit(1); 131 } 132#ifdef DEBUG 133 printf("WRITE %d is at %p\n", i, iocb[i]); 134#endif 135 result = rand(); 136 if (result < RAND_MAX/32) { 137 if (result > RAND_MAX/64) { 138 result = aio_cancel(fd, iocb[i]); 139#ifdef DEBUG 140 printf("Cancel %d %p result %d\n", i, iocb[i], result); 141#endif 142 if (result == AIO_CANCELED) { 143 aio_return(iocb[i]); 144 iocb[i] = NULL; 145 pending--; 146 } 147 } 148 } 149 } 150#ifdef DEBUG 151 cancel = max_queue_per_proc - pending; 152#endif 153 154 i = 0; 155 while (pending) { 156 157 for (;;) { 158 159 bzero(&ke, sizeof(ke)); 160 bzero(&kq_returned, sizeof(ke)); 161 ts.tv_sec = 0; 162 ts.tv_nsec = 1; 163 result = kevent(kq, NULL, 0, 164 &kq_returned, 1, &ts); 165#ifdef DEBUG 166 error = errno; 167#endif 168 if (result < 0) 169 perror("kevent error: "); 170 kq_iocb = kq_returned.udata; 171#ifdef DEBUG 172 printf("kevent %d %d errno %d return.ident %p " 173 "return.data %p return.udata %p %p\n", 174 i, result, error, 175 (void*)kq_returned.ident, 176 (void*)kq_returned.data, 177 kq_returned.udata, 178 kq_iocb); 179#endif 180 181 if (kq_iocb) 182 break; 183#ifdef DEBUG 184 printf("Try again left %d out of %lu %d\n", 185 pending, max_queue_per_proc, cancel); 186#endif 187 } 188 189 for (j = 0; j < max_queue_per_proc && iocb[j] != kq_iocb; 190 j++) ; 191#ifdef DEBUG 192 printf("kq_iocb %p\n", kq_iocb); 193 194 printf("Error Result for %d is %d pending %d\n", 195 j, result, pending); 196#endif 197 result = aio_return(kq_iocb); 198#ifdef DEBUG 199 printf("Return Result for %d is %d\n\n", j, result); 200#endif 201 if (result != sizeof(buffer)) { 202 printf("FAIL: run %d, operation %d, result %d " 203 " (errno=%d) should be %zu\n", run, pending, 204 result, errno, sizeof(buffer)); 205 failed++; 206 } else 207 printf("PASS: run %d, left %d\n", run, 208 pending - 1); 209 210 free(kq_iocb); 211 iocb[j] = NULL; 212 pending--; 213 i++; 214 } 215 216 for (i = 0; i < max_queue_per_proc; i++) 217 free(iocb[i]); 218 219 } 220 221 if (tmp_file) 222 unlink(pathname); 223 224 if (failed != 0) 225 printf("FAIL: %d tests failed\n", failed); 226 else 227 printf("PASS: All tests passed\n"); 228 229 exit (failed == 0 ? 0 : 1); 230} 231