rt/tst-aio.c

   1 /* Tests for AIO in librt.
   2    Copyright (C) 1998-2017 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 <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 /* We might need a bit longer timeout.  */
  38 #define TIMEOUT 20 /* sec */
  39
  40 /* This defines the `main' function and some more.  */
  41 #include <test-skeleton.c>
  42
  43
  44 /* These are for the temporary file we generate.  */
  45 char *name;
  46 int fd;
  47
  48 void
  49 do_prepare (int argc, char *argv[])
  50 {
  51   size_t name_len;
  52
  53   name_len = strlen (test_dir);
  54   name = xmalloc (name_len + sizeof ("/aioXXXXXX"));
  55   mempcpy (mempcpy (name, test_dir, name_len),
  56            "/aioXXXXXX", sizeof ("/aioXXXXXX"));
  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   add_temp_file (name);
  63 }
  64
  65
  66 static int
  67 test_file (const void *buf, size_t size, int fd, const char *msg)
  68 {
  69   struct stat st;
  70   char tmp[size];
  71
  72   errno = 0;
  73   if (fstat (fd, &st) < 0)
  74     {
  75       error (0, errno, "%s: failed stat", msg);
  76       return 1;
  77     }
  78
  79   if (st.st_size != (off_t) size)
  80     {
  81       error (0, errno, "%s: wrong size: %lu, should be %lu",
  82              msg, (unsigned long int) st.st_size, (unsigned long int) size);
  83       return 1;
  84     }
  85
  86   if (pread (fd, tmp, size, 0) != (ssize_t) size)
  87     {
  88       error (0, errno, "%s: failed pread", msg);
  89       return 1;
  90     }
  91
  92   if (memcmp (buf, tmp, size) != 0)
  93     {
  94       error (0, errno, "%s: failed comparison", msg);
  95       return 1;
  96     }
  97
  98   printf ("%s test ok\n", msg);
  99
 100   return 0;
 101 }
 102
 103
 104 static int
 105 do_wait (struct aiocb **cbp, size_t nent, int allowed_err)
 106 {
 107   int go_on;
 108   size_t cnt;
 109   int result = 0;
 110
 111   do
 112     {
 113       aio_suspend ((const struct aiocb *const *) cbp, nent, NULL);
 114       go_on = 0;
 115       for (cnt = 0; cnt < nent; ++cnt)
 116         if (cbp[cnt] != NULL)
 117           {
 118             if (aio_error (cbp[cnt]) == EINPROGRESS)
 119               go_on = 1;
 120             else
 121               {
 122                 if (aio_return (cbp[cnt]) == -1
 123                     && (allowed_err == 0
 124                         || aio_error (cbp[cnt]) != allowed_err))
 125                   {
 126                     error (0, aio_error (cbp[cnt]), "Operation failed\n");
 127                     result = 1;
 128                   }
 129                 cbp[cnt] = NULL;
 130               }
 131           }
 132     }
 133   while (go_on);
 134
 135   return result;
 136 }
 137
 138
 139 int
 140 do_test (int argc, char *argv[])
 141 {
 142   struct aiocb cbs[10];
 143   struct aiocb cbs_fsync;
 144   struct aiocb *cbp[10];
 145   struct aiocb *cbp_fsync[1];
 146   char buf[1000];
 147   size_t cnt;
 148   int result = 0;
 149
 150   /* Preparation.  */
 151   for (cnt = 0; cnt < 10; ++cnt)
 152     {
 153       cbs[cnt].aio_fildes = fd;
 154       cbs[cnt].aio_reqprio = 0;
 155       cbs[cnt].aio_buf = memset (&buf[cnt * 100], '0' + cnt, 100);
 156       cbs[cnt].aio_nbytes = 100;
 157       cbs[cnt].aio_offset = cnt * 100;
 158       cbs[cnt].aio_sigevent.sigev_notify = SIGEV_NONE;
 159
 160       cbp[cnt] = &cbs[cnt];
 161     }
 162
 163   /* First a simple test.  */
 164   for (cnt = 10; cnt > 0; )
 165     if (aio_write (cbp[--cnt]) < 0 && errno == ENOSYS)
 166       {
 167         error (0, 0, "no aio support in this configuration");
 168         return 0;
 169       }
 170   /* Wait 'til the results are there.  */
 171   result |= do_wait (cbp, 10, 0);
 172   /* Test this.  */
 173   result |= test_file (buf, sizeof (buf), fd, "aio_write");
 174
 175   /* Read now as we've written it.  */
 176   memset (buf, '\0', sizeof (buf));
 177   /* Issue the commands.  */
 178   for (cnt = 10; cnt > 0; )
 179     {
 180       --cnt;
 181       cbp[cnt] = &cbs[cnt];
 182       aio_read (cbp[cnt]);
 183     }
 184   /* Wait 'til the results are there.  */
 185   result |= do_wait (cbp, 10, 0);
 186   /* Test this.  */
 187   for (cnt = 0; cnt < 1000; ++cnt)
 188     if (buf[cnt] != '0' + (cnt / 100))
 189       {
 190         result = 1;
 191         error (0, 0, "comparison failed for aio_read test");
 192         break;
 193       }
 194
 195   if (cnt == 1000)
 196     puts ("aio_read test ok");
 197
 198   /* Remove the test file contents.  */
 199   if (ftruncate (fd, 0) < 0)
 200     {
 201       error (0, errno, "ftruncate failed\n");
 202       result = 1;
 203     }
 204
 205   /* Test lio_listio.  */
 206   for (cnt = 0; cnt < 10; ++cnt)
 207     {
 208       cbs[cnt].aio_lio_opcode = LIO_WRITE;
 209       cbp[cnt] = &cbs[cnt];
 210     }
 211   /* Issue the command.  */
 212   lio_listio (LIO_WAIT, cbp, 10, NULL);
 213   /* ...and immediately test it since we started it in wait mode.  */
 214   result |= test_file (buf, sizeof (buf), fd, "lio_listio (write)");
 215
 216   /* Test aio_fsync.  */
 217   cbs_fsync.aio_fildes = fd;
 218   cbs_fsync.aio_sigevent.sigev_notify = SIGEV_NONE;
 219   cbp_fsync[0] = &cbs_fsync;
 220
 221   /* Remove the test file contents first.  */
 222   if (ftruncate (fd, 0) < 0)
 223     {
 224       error (0, errno, "ftruncate failed\n");
 225       result = 1;
 226     }
 227
 228   /* Write again.  */
 229   for (cnt = 10; cnt > 0; )
 230     aio_write (cbp[--cnt]);
 231
 232   if (aio_fsync (O_SYNC, &cbs_fsync) < 0)
 233     {
 234       error (0, errno, "aio_fsync failed\n");
 235       result = 1;
 236     }
 237   result |= do_wait (cbp_fsync, 1, 0);
 238
 239   /* ...and test since all data should be on disk now.  */
 240   result |= test_file (buf, sizeof (buf), fd, "aio_fsync (aio_write)");
 241
 242   /* Test aio_cancel.  */
 243   /* Remove the test file contents first.  */
 244   if (ftruncate (fd, 0) < 0)
 245     {
 246       error (0, errno, "ftruncate failed\n");
 247       result = 1;
 248     }
 249
 250   /* Write again.  */
 251   for (cnt = 10; cnt > 0; )
 252     aio_write (cbp[--cnt]);
 253
 254   /* Cancel all requests.  */
 255   if (aio_cancel (fd, NULL) == -1)
 256     printf ("aio_cancel (fd, NULL) cannot cancel anything\n");
 257
 258   result |= do_wait (cbp, 10, ECANCELED);
 259
 260   /* Another test for aio_cancel.  */
 261   /* Remove the test file contents first.  */
 262   if (ftruncate (fd, 0) < 0)
 263     {
 264       error (0, errno, "ftruncate failed\n");
 265       result = 1;
 266     }
 267
 268   /* Write again.  */
 269   for (cnt = 10; cnt > 0; )
 270     {
 271       --cnt;
 272       cbp[cnt] = &cbs[cnt];
 273       aio_write (cbp[cnt]);
 274     }
 275   puts ("finished3");
 276
 277   /* Cancel all requests.  */
 278   for (cnt = 10; cnt > 0; )
 279     if (aio_cancel (fd, cbp[--cnt]) == -1)
 280       /* This is not an error.  The request can simply be finished.  */
 281       printf ("aio_cancel (fd, cbp[%Zd]) cannot be canceled\n", cnt);
 282   puts ("finished2");
 283
 284   result |= do_wait (cbp, 10, ECANCELED);
 285
 286   puts ("finished");
 287
 288   return result;
 289 }