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
  51 #define PATH_TEMPLATE   "aio.XXXXXXXXXX"
  52
  53 #define MAX_IOCBS 128
  54 #define MAX_RUNS 300
  55 /* #define DEBUG */
  56
  57 int
  58 main (int argc, char *argv[])
  59 {
  60         struct aiocb *iocb[MAX_IOCBS], *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 cancel, error, failed = 0, fd, kq, pending, result, run;
  66         int tmp_file = 0;
  67         unsigned i, j;
  68
  69         PLAIN_REQUIRE_KERNEL_MODULE("aio", 0);
  70
  71         kq = kqueue();
  72         if (kq < 0) {
  73                 perror("No kqeueue\n");
  74                 exit(1);
  75         }
  76
  77         if (argc == 1) {
  78                 strcpy(pathname, PATH_TEMPLATE);
  79                 fd = mkstemp(pathname);
  80                 file = pathname;
  81                 tmp_file = 1;
  82         } else {
  83                 file = argv[1];
  84                 fd = open(file, O_RDWR|O_CREAT, 0666);
  85         }
  86         if (fd == -1)
  87                 err(1, "Can't open %s\n", file);
  88
  89         for (run = 0; run < MAX_RUNS; run++){
  90 #ifdef DEBUG
  91                 printf("Run %d\n", run);
  92 #endif
  93                 for (i = 0; i < nitems(iocb); i++) {
  94                         iocb[i] = (struct aiocb *)calloc(1,
  95                             sizeof(struct aiocb));
  96                         if (iocb[i] == NULL)
  97                                 err(1, "calloc");
  98                 }
  99
 100                 pending = 0;
 101                 for (i = 0; i < nitems(iocb); i++) {
 102                         pending++;
 103                         iocb[i]->aio_nbytes = sizeof(buffer);
 104                         iocb[i]->aio_buf = buffer;
 105                         iocb[i]->aio_fildes = fd;
 106                         iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run;
 107
 108                         iocb[i]->aio_sigevent.sigev_notify_kqueue = kq;
 109                         iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i];
 110                         iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT;
 111
 112                         result = aio_write(iocb[i]);
 113                         if (result != 0) {
 114                                 perror("aio_write");
 115                                 printf("Result %d iteration %d\n", result, i);
 116                                 exit(1);
 117                         }
 118 #ifdef DEBUG
 119                         printf("WRITE %d is at %p\n", i, iocb[i]);
 120 #endif
 121                         result = rand();
 122                         if (result < RAND_MAX/32) {
 123                                 if (result > RAND_MAX/64) {
 124                                         result = aio_cancel(fd, iocb[i]);
 125 #ifdef DEBUG
 126                                         printf("Cancel %d %p result %d\n", i, iocb[i], result);
 127 #endif
 128                                         if (result == AIO_CANCELED) {
 129                                                 aio_return(iocb[i]);
 130                                                 iocb[i] = NULL;
 131                                                 pending--;
 132                                         }
 133                                 }
 134                         }
 135                 }
 136                 cancel = nitems(iocb) - pending;
 137
 138                 i = 0;
 139                 while (pending) {
 140
 141                         for (;;) {
 142
 143                                 bzero(&ke, sizeof(ke));
 144                                 bzero(&kq_returned, sizeof(ke));
 145                                 ts.tv_sec = 0;
 146                                 ts.tv_nsec = 1;
 147                                 result = kevent(kq, NULL, 0,
 148                                                 &kq_returned, 1, &ts);
 149                                 error = errno;
 150                                 if (result < 0)
 151                                         perror("kevent error: ");
 152                                 kq_iocb = kq_returned.udata;
 153 #ifdef DEBUG
 154                                 printf("kevent %d %d errno %d return.ident %p "
 155                                        "return.data %p return.udata %p %p\n",
 156                                        i, result, error,
 157                                        kq_returned.ident, kq_returned.data,
 158                                        kq_returned.udata,
 159                                        kq_iocb);
 160 #endif
 161
 162                                 if (kq_iocb)
 163                                         break;
 164 #ifdef DEBUG
 165                                 printf("Try again left %d out of %d %d\n",
 166                                     pending, nitems(iocb), cancel);
 167 #endif
 168                         }
 169
 170                         for (j = 0; j < nitems(iocb) && iocb[j] != kq_iocb;
 171                            j++) ;
 172 #ifdef DEBUG
 173                         printf("kq_iocb %p\n", kq_iocb);
 174
 175                         printf("Error Result for %d is %d pending %d\n",
 176                             j, result, pending);
 177 #endif
 178                         result = aio_return(kq_iocb);
 179 #ifdef DEBUG
 180                         printf("Return Result for %d is %d\n\n", j, result);
 181 #endif
 182                         if (result != sizeof(buffer)) {
 183                                 printf("FAIL: run %d, operation %d, result %d "
 184                                     " (errno=%d) should be %zu\n", run, pending,
 185                                     result, errno, sizeof(buffer));
 186                                 failed++;
 187                         } else
 188                                 printf("PASS: run %d, left %d\n", run,
 189                                     pending - 1);
 190
 191                         free(kq_iocb);
 192                         iocb[j] = NULL;
 193                         pending--;
 194                         i++;
 195                 }
 196
 197                 for (i = 0; i < nitems(iocb); i++)
 198                         free(iocb[i]);
 199
 200         }
 201
 202         if (tmp_file)
 203                 unlink(pathname);
 204
 205         if (failed != 0)
 206                 printf("FAIL: %d tests failed\n", failed);
 207         else
 208                 printf("PASS: All tests passed\n");
 209
 210         exit (failed == 0 ? 0 : 1);
 211 }