tools/regression/aio/kqueue/aio_kqueue.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  * Note: it is a good idea to run this against a physical drive to
  30  * exercise the physio fast path (ie. aio_kqueue /dev/<something safe>)
  31  */
  32
  33 #include <aio.h>
  34 #include <fcntl.h>
  35 #include <stdlib.h>
  36 #include <stdio.h>
  37 #include <errno.h>
  38 #include <sys/types.h>
  39 #include <sys/event.h>
  40 #include <sys/time.h>
  41 #include <unistd.h>
  42
  43 #define PATH_TEMPLATE   "/tmp/aio.XXXXXXXXXX"
  44
  45 #define MAX 128
  46 #define MAX_RUNS 300
  47 /* #define DEBUG */
  48
  49 main(int argc, char *argv[]){
  50         int fd;
  51         struct aiocb *iocb[MAX], *kq_iocb;
  52         int i, result, run, error, j;
  53         char buffer[32768];
  54         int kq = kqueue();
  55         struct kevent ke, kq_returned;
  56         struct timespec ts;
  57         int cancel, pending, tmp_file = 0, failed = 0;
  58         char *file, pathname[sizeof(PATH_TEMPLATE)-1];
  59
  60         if (kq < 0) {
  61                 perror("No kqeueue\n");
  62                 exit(1);
  63         }
  64
  65         if (argc == 1) {
  66                 strcpy(pathname, PATH_TEMPLATE);
  67                 fd = mkstemp(pathname);
  68                 file = pathname;
  69                 tmp_file = 1;
  70         } else {
  71                 file = argv[1];
  72                 fd = open(file, O_RDWR|O_CREAT, 0666);
  73         }
  74         if (fd < 0){
  75                 fprintf(stderr, "Can't open %s\n", file);
  76                 perror("");
  77                 exit(1);
  78         }
  79
  80         for (run = 0; run < MAX_RUNS; run++){
  81 #ifdef DEBUG
  82                 printf("Run %d\n", run);
  83 #endif
  84                 for(i = 0; i < MAX; i++) {
  85                         iocb[i] = (struct aiocb *)malloc(sizeof(struct aiocb));
  86                         bzero(iocb[i], sizeof(struct aiocb));
  87                 }
  88
  89                 pending = 0;
  90                 for(i = 0; i < MAX; i++) {
  91                         pending++;
  92                         iocb[i]->aio_nbytes = sizeof(buffer);
  93                         iocb[i]->aio_buf = buffer;
  94                         iocb[i]->aio_fildes = fd;
  95                         iocb[i]->aio_offset = iocb[i]->aio_nbytes * i * run;
  96
  97                         iocb[i]->aio_sigevent.sigev_notify_kqueue = kq;
  98                         iocb[i]->aio_sigevent.sigev_value.sival_ptr = iocb[i];
  99                         iocb[i]->aio_sigevent.sigev_notify = SIGEV_KEVENT;
 100
 101                         result = aio_write(iocb[i]);
 102                         if (result != 0) {
 103                                 perror("aio_write");
 104                                 printf("Result %d iteration %d\n",result, i);
 105                                 exit(1);
 106                         }
 107 #ifdef DEBUG
 108                         printf("WRITE %d is at %p\n", i, iocb[i]);
 109 #endif
 110                         result = rand();
 111                         if (result < RAND_MAX/32) {
 112                                 if (result > RAND_MAX/64) {
 113                                         result = aio_cancel(fd, iocb[i]);
 114 #ifdef DEBUG
 115                                         printf("Cancel %d %p result %d\n", i, iocb[i], result);
 116 #endif
 117                                         if (result == AIO_CANCELED) {
 118                                                 aio_return(iocb[i]);
 119                                                 iocb[i]=NULL;
 120                                                 pending--;
 121                                         }
 122                                 }
 123                         }
 124                 }
 125                 cancel = MAX - pending;
 126
 127                 i = 0;
 128                 while(pending) {
 129                         for(;;) {
 130                                 bzero(&ke, sizeof(ke));
 131                                 bzero(&kq_returned, sizeof(ke));
 132                                 ts.tv_sec = 0;
 133                                 ts.tv_nsec = 1;
 134                                 result = kevent(kq, NULL, 0,
 135                                                 &kq_returned, 1, &ts);
 136                                 error = errno;
 137                                 if (result < 0) {
 138                                         perror("kevent error: ");
 139                                 }
 140                                 kq_iocb = kq_returned.udata;
 141 #ifdef DEBUG
 142                                 printf("kevent %d %d errno %d return.ident %p "
 143                                        "return.data %p return.udata %p %p\n",
 144                                        i, result, error,
 145                                        kq_returned.ident, kq_returned.data,
 146                                        kq_returned.udata,
 147                                        kq_iocb);
 148 #endif
 149
 150                                 if(kq_iocb)
 151                                         break;
 152 #ifdef DEBUG
 153                                 printf("Try again left %d out of %d %d\n",pending, MAX, cancel);
 154 #endif
 155                         }
 156
 157                         for(j = 0; j < MAX; j++) {
 158                                 if (iocb[j] == kq_iocb) {
 159                                         break;
 160                                 }
 161                         }
 162 #ifdef DEBUG
 163                         printf("kq_iocb %p\n", kq_iocb);
 164
 165                         printf("Error Result for %d is %d pending %d\n", j, result, pending);
 166 #endif
 167                         result = aio_return(kq_iocb);
 168 #ifdef DEBUG
 169                         printf("Return Result for %d is %d\n", j, result);
 170                         printf("\n");
 171 #endif
 172                         if (result != sizeof(buffer)) {
 173                                 printf("FAIL: run %d, operation %d, result %d (errno=%d) should be %d\n", run, pending, result, errno, sizeof(buffer));
 174                                 failed = 1;
 175                         } else {
 176                                 printf("PASS: run %d, left %d\n", run, pending - 1);
 177                         }
 178
 179                         free(kq_iocb);
 180                         iocb[j] = NULL;
 181                         pending--;
 182                         i++;
 183                 }
 184         }
 185
 186         if (tmp_file) {
 187                 unlink(pathname);
 188         }
 189
 190         if (failed) {
 191                 printf("FAIL: Atleast one\n");
 192                 exit(1);
 193         } else {
 194                 printf("PASS: All\n");
 195                 exit(0);
 196         }
 197 }