tests/sys/aio/aio_kqueue_test.c

   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  * $FreeBSD$
  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
  57 int
  58 main (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 }