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_IOCBS 128
  55 #define MAX_RUNS 300
  56 /* #define DEBUG */
  57
  58 int
  59 main (int argc, char *argv[])
  60 {
  61         struct aiocb *iocb[MAX_IOCBS], *kq_iocb;
  62         char *file, pathname[sizeof(PATH_TEMPLATE)+1];
  63         struct kevent ke, kq_returned;
  64         struct timespec ts;
  65         char buffer[32768];
  66 #ifdef DEBUG
  67         int cancel, error;
  68 #endif
  69         int failed = 0, fd, kq, pending, result, run;
  70         int tmp_file = 0;
  71         unsigned i, j;
  72
  73         PLAIN_REQUIRE_KERNEL_MODULE("aio", 0);
  74         PLAIN_REQUIRE_UNSAFE_AIO(0);
  75
  76         kq = kqueue();
  77         if (kq < 0) {
  78                 perror("No kqeueue\n");
  79                 exit(1);
  80         }
  81
  82         if (argc == 1) {
  83                 strcpy(pathname, PATH_TEMPLATE);
  84                 fd = mkstemp(pathname);
  85                 file = pathname;
  86                 tmp_file = 1;
  87         } else {
  88                 file = argv[1];
  89                 fd = open(file, O_RDWR|O_CREAT, 0666);
  90         }
  91         if (fd == -1)
  92                 err(1, "Can't open %s\n", file);
  93
  94         for (run = 0; run < MAX_RUNS; run++){
  95 #ifdef DEBUG
  96                 printf("Run %d\n", run);
  97 #endif
  98                 for (i = 0; i < nitems(iocb); i++) {
  99                         iocb[i] = (struct aiocb *)calloc(1,
 100                             sizeof(struct aiocb));
 101                         if (iocb[i] == NULL)
 102                                 err(1, "calloc");
 103                 }
 104
 105                 pending = 0;
 106                 for (i = 0; i < nitems(iocb); i++) {
 107                         pending++;
 108                         iocb[i]->aio_nbytes = sizeof(buffer);
 109                         iocb[i]->aio_buf = buffer;
 110                         iocb[i]->aio_fildes = fd;
 111                         iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run;
 112
 113                         iocb[i]->aio_sigevent.sigev_notify_kqueue = kq;
 114                         iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i];
 115                         iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT;
 116
 117                         result = aio_write(iocb[i]);
 118                         if (result != 0) {
 119                                 perror("aio_write");
 120                                 printf("Result %d iteration %d\n", result, i);
 121                                 exit(1);
 122                         }
 123 #ifdef DEBUG
 124                         printf("WRITE %d is at %p\n", i, iocb[i]);
 125 #endif
 126                         result = rand();
 127                         if (result < RAND_MAX/32) {
 128                                 if (result > RAND_MAX/64) {
 129                                         result = aio_cancel(fd, iocb[i]);
 130 #ifdef DEBUG
 131                                         printf("Cancel %d %p result %d\n", i, iocb[i], result);
 132 #endif
 133                                         if (result == AIO_CANCELED) {
 134                                                 aio_return(iocb[i]);
 135                                                 iocb[i] = NULL;
 136                                                 pending--;
 137                                         }
 138                                 }
 139                         }
 140                 }
 141 #ifdef DEBUG
 142                 cancel = nitems(iocb) - pending;
 143 #endif
 144
 145                 i = 0;
 146                 while (pending) {
 147
 148                         for (;;) {
 149
 150                                 bzero(&ke, sizeof(ke));
 151                                 bzero(&kq_returned, sizeof(ke));
 152                                 ts.tv_sec = 0;
 153                                 ts.tv_nsec = 1;
 154                                 result = kevent(kq, NULL, 0,
 155                                                 &kq_returned, 1, &ts);
 156 #ifdef DEBUG
 157                                 error = errno;
 158 #endif
 159                                 if (result < 0)
 160                                         perror("kevent error: ");
 161                                 kq_iocb = kq_returned.udata;
 162 #ifdef DEBUG
 163                                 printf("kevent %d %d errno %d return.ident %p "
 164                                        "return.data %p return.udata %p %p\n",
 165                                        i, result, error,
 166                                        (void*)kq_returned.ident,
 167                                        (void*)kq_returned.data,
 168                                        kq_returned.udata,
 169                                        kq_iocb);
 170 #endif
 171
 172                                 if (kq_iocb)
 173                                         break;
 174 #ifdef DEBUG
 175                                 printf("Try again left %d out of %lu %d\n",
 176                                     pending, nitems(iocb), cancel);
 177 #endif
 178                         }
 179
 180                         for (j = 0; j < nitems(iocb) && iocb[j] != kq_iocb;
 181                            j++) ;
 182 #ifdef DEBUG
 183                         printf("kq_iocb %p\n", kq_iocb);
 184
 185                         printf("Error Result for %d is %d pending %d\n",
 186                             j, result, pending);
 187 #endif
 188                         result = aio_return(kq_iocb);
 189 #ifdef DEBUG
 190                         printf("Return Result for %d is %d\n\n", j, result);
 191 #endif
 192                         if (result != sizeof(buffer)) {
 193                                 printf("FAIL: run %d, operation %d, result %d "
 194                                     " (errno=%d) should be %zu\n", run, pending,
 195                                     result, errno, sizeof(buffer));
 196                                 failed++;
 197                         } else
 198                                 printf("PASS: run %d, left %d\n", run,
 199                                     pending - 1);
 200
 201                         free(kq_iocb);
 202                         iocb[j] = NULL;
 203                         pending--;
 204                         i++;
 205                 }
 206
 207                 for (i = 0; i < nitems(iocb); i++)
 208                         free(iocb[i]);
 209
 210         }
 211
 212         if (tmp_file)
 213                 unlink(pathname);
 214
 215         if (failed != 0)
 216                 printf("FAIL: %d tests failed\n", failed);
 217         else
 218                 printf("PASS: All tests passed\n");
 219
 220         exit (failed == 0 ? 0 : 1);
 221 }