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 26 /* 27 * Prerequisities: 28 * - AIO support must be compiled into the kernel (see sys/<arch>/NOTES for 29 * more details). 30 * 31 * Note: it is a good idea to run this against a physical drive to 32 * exercise the physio fast path (ie. aio_kqueue /dev/<something safe>) 33 */ 34 35 #include <sys/types.h> 36 #include <sys/event.h> 37 #include <sys/time.h> 38 #include <assert.h> 39 #include <aio.h> 40 #include <err.h> 41 #include <errno.h> 42 #include <fcntl.h> 43 #include <stdlib.h> 44 #include <stdio.h> 45 #include <string.h> 46 #include <unistd.h> 47 48 #include "freebsd_test_suite/macros.h" 49 #include "local.h" 50 51 #define PATH_TEMPLATE "aio.XXXXXXXXXX" 52 53 #define MAX_RUNS 300 54 /* #define DEBUG */ 55 56 int 57 main (int argc, char *argv[]) 58 { 59 struct aiocb **iocb, *kq_iocb; 60 char *file, pathname[sizeof(PATH_TEMPLATE)+1]; 61 struct kevent kq_returned; 62 struct timespec ts; 63 char buffer[32768]; 64 int max_queue_per_proc; 65 size_t max_queue_per_proc_size; 66 #ifdef DEBUG 67 int cancel, error; 68 #endif 69 int failed = 0, fd, kq, pending, result, run; 70 int tmp_file = 0; 71 int i, j; 72 73 PLAIN_REQUIRE_KERNEL_MODULE("aio", 0); 74 PLAIN_REQUIRE_UNSAFE_AIO(0); 75 76 max_queue_per_proc_size = sizeof(max_queue_per_proc); 77 if (sysctlbyname("vfs.aio.max_aio_queue_per_proc", 78 &max_queue_per_proc, &max_queue_per_proc_size, NULL, 0) != 0) 79 err(1, "sysctlbyname"); 80 iocb = calloc(max_queue_per_proc, sizeof(struct aiocb*)); 81 if (iocb == NULL) 82 err(1, "calloc"); 83 84 kq = kqueue(); 85 if (kq < 0) { 86 perror("No kqeueue\n"); 87 exit(1); 88 } 89 90 if (argc == 1) { 91 strcpy(pathname, PATH_TEMPLATE); 92 fd = mkstemp(pathname); 93 file = pathname; 94 tmp_file = 1; 95 } else { 96 file = argv[1]; 97 fd = open(file, O_RDWR|O_CREAT, 0666); 98 } 99 if (fd == -1) 100 err(1, "Can't open %s\n", file); 101 102 for (run = 0; run < MAX_RUNS; run++){ 103 #ifdef DEBUG 104 printf("Run %d\n", run); 105 #endif 106 for (i = 0; i < max_queue_per_proc; i++) { 107 iocb[i] = (struct aiocb *)calloc(1, 108 sizeof(struct aiocb)); 109 if (iocb[i] == NULL) 110 err(1, "calloc"); 111 } 112 113 pending = 0; 114 for (i = 0; i < max_queue_per_proc; i++) { 115 pending++; 116 iocb[i]->aio_nbytes = sizeof(buffer); 117 iocb[i]->aio_buf = buffer; 118 iocb[i]->aio_fildes = fd; 119 iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run; 120 121 iocb[i]->aio_sigevent.sigev_notify_kqueue = kq; 122 iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i]; 123 iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT; 124 125 result = aio_write(iocb[i]); 126 if (result != 0) { 127 perror("aio_write"); 128 printf("Result %d iteration %d\n", result, i); 129 exit(1); 130 } 131 #ifdef DEBUG 132 printf("WRITE %d is at %p\n", i, iocb[i]); 133 #endif 134 result = rand(); 135 if (result < RAND_MAX/32) { 136 if (result > RAND_MAX/64) { 137 result = aio_cancel(fd, iocb[i]); 138 #ifdef DEBUG 139 printf("Cancel %d %p result %d\n", i, iocb[i], result); 140 #endif 141 if (result == AIO_CANCELED) { 142 aio_return(iocb[i]); 143 iocb[i] = NULL; 144 pending--; 145 } 146 } 147 } 148 } 149 #ifdef DEBUG 150 cancel = max_queue_per_proc - pending; 151 #endif 152 153 i = 0; 154 while (pending) { 155 156 for (;;) { 157 158 bzero(&kq_returned, sizeof(kq_returned)); 159 ts.tv_sec = 0; 160 ts.tv_nsec = 1; 161 result = kevent(kq, NULL, 0, 162 &kq_returned, 1, &ts); 163 #ifdef DEBUG 164 error = errno; 165 #endif 166 if (result < 0) 167 perror("kevent error: "); 168 kq_iocb = kq_returned.udata; 169 #ifdef DEBUG 170 printf("kevent %d %d errno %d return.ident %p " 171 "return.data %p return.udata %p %p" 172 " filter %d flags %#x fflags %#x\n", 173 i, result, error, 174 (void*)kq_returned.ident, 175 (void*)kq_returned.data, 176 kq_returned.udata, 177 kq_iocb, 178 kq_returned.filter, 179 kq_returned.flags, 180 kq_returned.fflags); 181 if (result > 0) 182 printf("\tsigev_notify_kevent_flags %#x\n", 183 ((struct aiocb*)(kq_returned.ident))->aio_sigevent.sigev_notify_kevent_flags); 184 #endif 185 186 if (kq_iocb) 187 break; 188 #ifdef DEBUG 189 printf("Try again left %d out of %d %d\n", 190 pending, max_queue_per_proc, cancel); 191 #endif 192 } 193 194 for (j = 0; j < max_queue_per_proc && iocb[j] != kq_iocb; 195 j++) ; 196 assert(j < max_queue_per_proc); 197 #ifdef DEBUG 198 printf("kq_iocb %p\n", kq_iocb); 199 200 printf("Error Result for %d is %d pending %d\n", 201 j, result, pending); 202 #endif 203 result = aio_return(kq_iocb); 204 #ifdef DEBUG 205 printf("Return Result for %d is %d\n\n", j, result); 206 #endif 207 if (result != sizeof(buffer)) { 208 printf("FAIL: run %d, operation %d, result %d " 209 " (errno=%d) should be %zu\n", run, pending, 210 result, errno, sizeof(buffer)); 211 failed++; 212 } else 213 printf("PASS: run %d, left %d\n", run, 214 pending - 1); 215 216 free(kq_iocb); 217 iocb[j] = NULL; 218 pending--; 219 i++; 220 } 221 222 for (i = 0; i < max_queue_per_proc; i++) 223 free(iocb[i]); 224 225 } 226 227 if (tmp_file) 228 unlink(pathname); 229 230 if (failed != 0) 231 printf("FAIL: %d tests failed\n", failed); 232 else 233 printf("PASS: All tests passed\n"); 234 235 exit (failed == 0 ? 0 : 1); 236 } 237