rt/tst-aio.c

   1 /* Tests for AIO in librt.
   2    Copyright (C) 1998,2000,02 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <aio.h>
  21 #include <errno.h>
  22 #include <error.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26 #include <sys/stat.h>
  27
  28
  29 /* Prototype for our test function.  */
  30 extern void do_prepare (int argc, char *argv[]);
  31 extern int do_test (int argc, char *argv[]);
  32
  33 /* We have a preparation function.  */
  34 #define PREPARE do_prepare
  35
  36 /* We might need a bit longer timeout.  */
  37 #define TIMEOUT 20 /* sec */
  38
  39 /* This defines the `main' function and some more.  */
  40 #include <test-skeleton.c>
  41
  42
  43 /* These are for the temporary file we generate.  */
  44 char *name;
  45 int fd;
  46
  47 void
  48 do_prepare (int argc, char *argv[])
  49 {
  50   size_t name_len;
  51
  52   name_len = strlen (test_dir);
  53   name = malloc (name_len + sizeof ("/aioXXXXXX"));
  54   mempcpy (mempcpy (name, test_dir, name_len),
  55            "/aioXXXXXX", sizeof ("/aioXXXXXX"));
  56   add_temp_file (name);
  57
  58   /* Open our test file.   */
  59   fd = mkstemp (name);
  60   if (fd == -1)
  61     error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
  62 }
  63
  64
  65 static int
  66 test_file (const void *buf, size_t size, int fd, const char *msg)
  67 {
  68   struct stat st;
  69   char tmp[size];
  70
  71   errno = 0;
  72   if (fstat (fd, &st) < 0)
  73     {
  74       error (0, errno, "%s: failed stat", msg);
  75       return 1;
  76     }
  77
  78   if (st.st_size != (off_t) size)
  79     {
  80       error (0, errno, "%s: wrong size: %lu, should be %lu",
  81              msg, (unsigned long int) st.st_size, (unsigned long int) size);
  82       return 1;
  83     }
  84
  85   if (pread (fd, tmp, size, 0) != (ssize_t) size)
  86     {
  87       error (0, errno, "%s: failed pread", msg);
  88       return 1;
  89     }
  90
  91   if (memcmp (buf, tmp, size) != 0)
  92     {
  93       error (0, errno, "%s: failed comparison", msg);
  94       return 1;
  95     }
  96
  97   printf ("%s test ok\n", msg);
  98
  99   return 0;
 100 }
 101
 102
 103 static int
 104 do_wait (struct aiocb **cbp, size_t nent, int allowed_err)
 105 {
 106   int go_on;
 107   size_t cnt;
 108   int result = 0;
 109
 110   do
 111     {
 112       aio_suspend ((const struct aiocb *const *) cbp, nent, NULL);
 113       go_on = 0;
 114       for (cnt = 0; cnt < nent; ++cnt)
 115         if (cbp[cnt] != NULL)
 116           {
 117             if (aio_error (cbp[cnt]) == EINPROGRESS)
 118               go_on = 1;
 119             else
 120               {
 121                 if (aio_return (cbp[cnt]) == -1
 122                     && (allowed_err == 0
 123                         || aio_error (cbp[cnt]) != allowed_err))
 124                   {
 125                     error (0, aio_error (cbp[cnt]), "Operation failed\n");
 126                     result = 1;
 127                   }
 128                 cbp[cnt] = NULL;
 129               }
 130           }
 131     }
 132   while (go_on);
 133
 134   return result;
 135 }
 136
 137
 138 int
 139 do_test (int argc, char *argv[])
 140 {
 141   struct aiocb cbs[10];
 142   struct aiocb cbs_fsync;
 143   struct aiocb *cbp[10];
 144   struct aiocb *cbp_fsync[1];
 145   char buf[1000];
 146   size_t cnt;
 147   int result = 0;
 148
 149   /* Preparation.  */
 150   for (cnt = 0; cnt < 10; ++cnt)
 151     {
 152       cbs[cnt].aio_fildes = fd;
 153       cbs[cnt].aio_reqprio = 0;
 154       cbs[cnt].aio_buf = memset (&buf[cnt * 100], '0' + cnt, 100);
 155       cbs[cnt].aio_nbytes = 100;
 156       cbs[cnt].aio_offset = cnt * 100;
 157       cbs[cnt].aio_sigevent.sigev_notify = SIGEV_NONE;
 158
 159       cbp[cnt] = &cbs[cnt];
 160     }
 161
 162   /* First a simple test.  */
 163   for (cnt = 10; cnt > 0; )
 164     if (aio_write (cbp[--cnt]) < 0 && errno == ENOSYS)
 165       {
 166         error (0, 0, "no aio support in this configuration");
 167         return 0;
 168       }
 169   /* Wait 'til the results are there.  */
 170   result |= do_wait (cbp, 10, 0);
 171   /* Test this.  */
 172   result |= test_file (buf, sizeof (buf), fd, "aio_write");
 173
 174   /* Read now as we've written it.  */
 175   memset (buf, '\0', sizeof (buf));
 176   /* Issue the commands.  */
 177   for (cnt = 10; cnt > 0; )
 178     {
 179       --cnt;
 180       cbp[cnt] = &cbs[cnt];
 181       aio_read (cbp[cnt]);
 182     }
 183   /* Wait 'til the results are there.  */
 184   result |= do_wait (cbp, 10, 0);
 185   /* Test this.  */
 186   for (cnt = 0; cnt < 1000; ++cnt)
 187     if (buf[cnt] != '0' + (cnt / 100))
 188       {
 189         result = 1;
 190         error (0, 0, "comparison failed for aio_read test");
 191         break;
 192       }
 193
 194   if (cnt == 1000)
 195     puts ("aio_read test ok");
 196
 197   /* Remove the test file contents.  */
 198   if (ftruncate (fd, 0) < 0)
 199     {
 200       error (0, errno, "ftruncate failed\n");
 201       result = 1;
 202     }
 203
 204   /* Test lio_listio.  */
 205   for (cnt = 0; cnt < 10; ++cnt)
 206     {
 207       cbs[cnt].aio_lio_opcode = LIO_WRITE;
 208       cbp[cnt] = &cbs[cnt];
 209     }
 210   /* Issue the command.  */
 211   lio_listio (LIO_WAIT, cbp, 10, NULL);
 212   /* ...and immediately test it since we started it in wait mode.  */
 213   result |= test_file (buf, sizeof (buf), fd, "lio_listio (write)");
 214
 215   /* Test aio_fsync.  */
 216   cbs_fsync.aio_fildes = fd;
 217   cbs_fsync.aio_sigevent.sigev_notify = SIGEV_NONE;
 218   cbp_fsync[0] = &cbs_fsync;
 219
 220   /* Remove the test file contents first.  */
 221   if (ftruncate (fd, 0) < 0)
 222     {
 223       error (0, errno, "ftruncate failed\n");
 224       result = 1;
 225     }
 226
 227   /* Write again.  */
 228   for (cnt = 10; cnt > 0; )
 229     aio_write (cbp[--cnt]);
 230
 231   if (aio_fsync (O_SYNC, &cbs_fsync) < 0)
 232     {
 233       error (0, errno, "aio_fsync failed\n");
 234       result = 1;
 235     }
 236   result |= do_wait (cbp_fsync, 1, 0);
 237
 238   /* ...and test since all data should be on disk now.  */
 239   result |= test_file (buf, sizeof (buf), fd, "aio_fsync (aio_write)");
 240
 241   /* Test aio_cancel.  */
 242   /* Remove the test file contents first.  */
 243   if (ftruncate (fd, 0) < 0)
 244     {
 245       error (0, errno, "ftruncate failed\n");
 246       result = 1;
 247     }
 248
 249   /* Write again.  */
 250   for (cnt = 10; cnt > 0; )
 251     aio_write (cbp[--cnt]);
 252
 253   /* Cancel all requests.  */
 254   if (aio_cancel (fd, NULL) == -1)
 255     printf ("aio_cancel (fd, NULL) cannot cancel anything\n");
 256
 257   result |= do_wait (cbp, 10, ECANCELED);
 258
 259   /* Another test for aio_cancel.  */
 260   /* Remove the test file contents first.  */
 261   if (ftruncate (fd, 0) < 0)
 262     {
 263       error (0, errno, "ftruncate failed\n");
 264       result = 1;
 265     }
 266
 267   /* Write again.  */
 268   for (cnt = 10; cnt > 0; )
 269     {
 270       --cnt;
 271       cbp[cnt] = &cbs[cnt];
 272       aio_write (cbp[cnt]);
 273     }
 274   puts ("finished3");
 275
 276   /* Cancel all requests.  */
 277   for (cnt = 10; cnt > 0; )
 278     if (aio_cancel (fd, cbp[--cnt]) == -1)
 279       /* This is not an error.  The request can simply be finished.  */
 280       printf ("aio_cancel (fd, cbp[%Zd]) cannot be canceled\n", cnt);
 281   puts ("finished2");
 282
 283   result |= do_wait (cbp, 10, ECANCELED);
 284
 285   puts ("finished");
 286
 287   return result;
 288 }