rt/tst-aio.c

   1 /* Tests for AIO in librt.
   2    Copyright (C) 1998-2020 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    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <aio.h>
  21 #include <errno.h>
  22 #include <error.h>
  23 #include <fcntl.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <sys/stat.h>
  28
  29
  30 /* Prototype for our test function.  */
  31 extern void do_prepare (int argc, char *argv[]);
  32 extern int do_test (int argc, char *argv[]);
  33
  34 /* We have a preparation function.  */
  35 #define PREPARE do_prepare
  36
  37 /* This defines the `main' function and some more.  */
  38 #include <test-skeleton.c>
  39
  40
  41 /* These are for the temporary file we generate.  */
  42 char *name;
  43 int fd;
  44
  45 void
  46 do_prepare (int argc, char *argv[])
  47 {
  48   size_t name_len;
  49
  50   name_len = strlen (test_dir);
  51   name = xmalloc (name_len + sizeof ("/aioXXXXXX"));
  52   mempcpy (mempcpy (name, test_dir, name_len),
  53            "/aioXXXXXX", sizeof ("/aioXXXXXX"));
  54
  55   /* Open our test file.   */
  56   fd = mkstemp (name);
  57   if (fd == -1)
  58     error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
  59   add_temp_file (name);
  60 }
  61
  62
  63 static int
  64 test_file (const void *buf, size_t size, int fd, const char *msg)
  65 {
  66   struct stat st;
  67   char tmp[size];
  68
  69   errno = 0;
  70   if (fstat (fd, &st) < 0)
  71     {
  72       error (0, errno, "%s: failed stat", msg);
  73       return 1;
  74     }
  75
  76   if (st.st_size != (off_t) size)
  77     {
  78       error (0, errno, "%s: wrong size: %lu, should be %lu",
  79              msg, (unsigned long int) st.st_size, (unsigned long int) size);
  80       return 1;
  81     }
  82
  83   if (pread (fd, tmp, size, 0) != (ssize_t) size)
  84     {
  85       error (0, errno, "%s: failed pread", msg);
  86       return 1;
  87     }
  88
  89   if (memcmp (buf, tmp, size) != 0)
  90     {
  91       error (0, errno, "%s: failed comparison", msg);
  92       return 1;
  93     }
  94
  95   printf ("%s test ok\n", msg);
  96
  97   return 0;
  98 }
  99
 100
 101 static int
 102 do_wait (struct aiocb **cbp, size_t nent, int allowed_err)
 103 {
 104   int go_on;
 105   size_t cnt;
 106   int result = 0;
 107
 108   do
 109     {
 110       aio_suspend ((const struct aiocb *const *) cbp, nent, NULL);
 111       go_on = 0;
 112       for (cnt = 0; cnt < nent; ++cnt)
 113         if (cbp[cnt] != NULL)
 114           {
 115             if (aio_error (cbp[cnt]) == EINPROGRESS)
 116               go_on = 1;
 117             else
 118               {
 119                 if (aio_return (cbp[cnt]) == -1
 120                     && (allowed_err == 0
 121                         || aio_error (cbp[cnt]) != allowed_err))
 122                   {
 123                     error (0, aio_error (cbp[cnt]), "Operation failed\n");
 124                     result = 1;
 125                   }
 126                 cbp[cnt] = NULL;
 127               }
 128           }
 129     }
 130   while (go_on);
 131
 132   return result;
 133 }
 134
 135
 136 int
 137 do_test (int argc, char *argv[])
 138 {
 139   struct aiocb cbs[10];
 140   struct aiocb cbs_fsync;
 141   struct aiocb *cbp[10];
 142   struct aiocb *cbp_fsync[1];
 143   char buf[1000];
 144   size_t cnt;
 145   int result = 0;
 146
 147   /* Preparation.  */
 148   for (cnt = 0; cnt < 10; ++cnt)
 149     {
 150       cbs[cnt].aio_fildes = fd;
 151       cbs[cnt].aio_reqprio = 0;
 152       cbs[cnt].aio_buf = memset (&buf[cnt * 100], '0' + cnt, 100);
 153       cbs[cnt].aio_nbytes = 100;
 154       cbs[cnt].aio_offset = cnt * 100;
 155       cbs[cnt].aio_sigevent.sigev_notify = SIGEV_NONE;
 156
 157       cbp[cnt] = &cbs[cnt];
 158     }
 159
 160   /* First a simple test.  */
 161   for (cnt = 10; cnt > 0; )
 162     if (aio_write (cbp[--cnt]) < 0 && errno == ENOSYS)
 163       {
 164         error (0, 0, "no aio support in this configuration");
 165         return 0;
 166       }
 167   /* Wait 'til the results are there.  */
 168   result |= do_wait (cbp, 10, 0);
 169   /* Test this.  */
 170   result |= test_file (buf, sizeof (buf), fd, "aio_write");
 171
 172   /* Read now as we've written it.  */
 173   memset (buf, '\0', sizeof (buf));
 174   /* Issue the commands.  */
 175   for (cnt = 10; cnt > 0; )
 176     {
 177       --cnt;
 178       cbp[cnt] = &cbs[cnt];
 179       aio_read (cbp[cnt]);
 180     }
 181   /* Wait 'til the results are there.  */
 182   result |= do_wait (cbp, 10, 0);
 183   /* Test this.  */
 184   for (cnt = 0; cnt < 1000; ++cnt)
 185     if (buf[cnt] != '0' + (cnt / 100))
 186       {
 187         result = 1;
 188         error (0, 0, "comparison failed for aio_read test");
 189         break;
 190       }
 191
 192   if (cnt == 1000)
 193     puts ("aio_read test ok");
 194
 195   /* Remove the test file contents.  */
 196   if (ftruncate (fd, 0) < 0)
 197     {
 198       error (0, errno, "ftruncate failed\n");
 199       result = 1;
 200     }
 201
 202   /* Test lio_listio.  */
 203   for (cnt = 0; cnt < 10; ++cnt)
 204     {
 205       cbs[cnt].aio_lio_opcode = LIO_WRITE;
 206       cbp[cnt] = &cbs[cnt];
 207     }
 208   /* Issue the command.  */
 209   lio_listio (LIO_WAIT, cbp, 10, NULL);
 210   /* ...and immediately test it since we started it in wait mode.  */
 211   result |= test_file (buf, sizeof (buf), fd, "lio_listio (write)");
 212
 213   /* Test aio_fsync.  */
 214   cbs_fsync.aio_fildes = fd;
 215   cbs_fsync.aio_sigevent.sigev_notify = SIGEV_NONE;
 216   cbp_fsync[0] = &cbs_fsync;
 217
 218   /* Remove the test file contents first.  */
 219   if (ftruncate (fd, 0) < 0)
 220     {
 221       error (0, errno, "ftruncate failed\n");
 222       result = 1;
 223     }
 224
 225   /* Write again.  */
 226   for (cnt = 10; cnt > 0; )
 227     aio_write (cbp[--cnt]);
 228
 229   if (aio_fsync (O_SYNC, &cbs_fsync) < 0)
 230     {
 231       error (0, errno, "aio_fsync failed\n");
 232       result = 1;
 233     }
 234   result |= do_wait (cbp_fsync, 1, 0);
 235
 236   /* ...and test since all data should be on disk now.  */
 237   result |= test_file (buf, sizeof (buf), fd, "aio_fsync (aio_write)");
 238
 239   /* Test aio_cancel.  */
 240   /* Remove the test file contents first.  */
 241   if (ftruncate (fd, 0) < 0)
 242     {
 243       error (0, errno, "ftruncate failed\n");
 244       result = 1;
 245     }
 246
 247   /* Write again.  */
 248   for (cnt = 10; cnt > 0; )
 249     aio_write (cbp[--cnt]);
 250
 251   /* Cancel all requests.  */
 252   if (aio_cancel (fd, NULL) == -1)
 253     printf ("aio_cancel (fd, NULL) cannot cancel anything\n");
 254
 255   result |= do_wait (cbp, 10, ECANCELED);
 256
 257   /* Another test for aio_cancel.  */
 258   /* Remove the test file contents first.  */
 259   if (ftruncate (fd, 0) < 0)
 260     {
 261       error (0, errno, "ftruncate failed\n");
 262       result = 1;
 263     }
 264
 265   /* Write again.  */
 266   for (cnt = 10; cnt > 0; )
 267     {
 268       --cnt;
 269       cbp[cnt] = &cbs[cnt];
 270       aio_write (cbp[cnt]);
 271     }
 272   puts ("finished3");
 273
 274   /* Cancel all requests.  */
 275   for (cnt = 10; cnt > 0; )
 276     if (aio_cancel (fd, cbp[--cnt]) == -1)
 277       /* This is not an error.  The request can simply be finished.  */
 278       printf ("aio_cancel (fd, cbp[%Zd]) cannot be canceled\n", cnt);
 279   puts ("finished2");
 280
 281   result |= do_wait (cbp, 10, ECANCELED);
 282
 283   puts ("finished");
 284
 285   return result;
 286 }