rt/tst-aio.c

   1 /* Tests for AIO in librt.
   2    Copyright (C) 1998-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <aio.h>
  20 #include <errno.h>
  21 #include <error.h>
  22 #include <fcntl.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 /* This defines the `main' function and some more.  */
  37 #include <test-skeleton.c>
  38
  39
  40 /* These are for the temporary file we generate.  */
  41 char *name;
  42 int fd;
  43
  44 void
  45 do_prepare (int argc, char *argv[])
  46 {
  47   size_t name_len;
  48
  49   name_len = strlen (test_dir);
  50   name = xmalloc (name_len + sizeof ("/aioXXXXXX"));
  51   mempcpy (mempcpy (name, test_dir, name_len),
  52            "/aioXXXXXX", sizeof ("/aioXXXXXX"));
  53
  54   /* Open our test file.   */
  55   fd = mkstemp (name);
  56   if (fd == -1)
  57     error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
  58   add_temp_file (name);
  59 }
  60
  61
  62 static int
  63 test_file (const void *buf, size_t size, int fd, const char *msg)
  64 {
  65   struct stat st;
  66   char tmp[size];
  67
  68   errno = 0;
  69   if (fstat (fd, &st) < 0)
  70     {
  71       error (0, errno, "%s: failed stat", msg);
  72       return 1;
  73     }
  74
  75   if (st.st_size != (off_t) size)
  76     {
  77       error (0, errno, "%s: wrong size: %lu, should be %lu",
  78              msg, (unsigned long int) st.st_size, (unsigned long int) size);
  79       return 1;
  80     }
  81
  82   if (pread (fd, tmp, size, 0) != (ssize_t) size)
  83     {
  84       error (0, errno, "%s: failed pread", msg);
  85       return 1;
  86     }
  87
  88   if (memcmp (buf, tmp, size) != 0)
  89     {
  90       error (0, errno, "%s: failed comparison", msg);
  91       return 1;
  92     }
  93
  94   printf ("%s test ok\n", msg);
  95
  96   return 0;
  97 }
  98
  99
 100 static int
 101 do_wait (struct aiocb **cbp, size_t nent, int allowed_err)
 102 {
 103   int go_on;
 104   size_t cnt;
 105   int result = 0;
 106
 107   do
 108     {
 109       aio_suspend ((const struct aiocb *const *) cbp, nent, NULL);
 110       go_on = 0;
 111       for (cnt = 0; cnt < nent; ++cnt)
 112         if (cbp[cnt] != NULL)
 113           {
 114             if (aio_error (cbp[cnt]) == EINPROGRESS)
 115               go_on = 1;
 116             else
 117               {
 118                 if (aio_return (cbp[cnt]) == -1
 119                     && (allowed_err == 0
 120                         || aio_error (cbp[cnt]) != allowed_err))
 121                   {
 122                     error (0, aio_error (cbp[cnt]), "Operation failed\n");
 123                     result = 1;
 124                   }
 125                 cbp[cnt] = NULL;
 126               }
 127           }
 128     }
 129   while (go_on);
 130
 131   return result;
 132 }
 133
 134
 135 int
 136 do_test (int argc, char *argv[])
 137 {
 138   struct aiocb cbs[10];
 139   struct aiocb cbs_fsync;
 140   struct aiocb *cbp[10];
 141   struct aiocb *cbp_fsync[1];
 142   char buf[1000];
 143   size_t cnt;
 144   int result = 0;
 145
 146   /* Preparation.  */
 147   for (cnt = 0; cnt < 10; ++cnt)
 148     {
 149       cbs[cnt].aio_fildes = fd;
 150       cbs[cnt].aio_reqprio = 0;
 151       cbs[cnt].aio_buf = memset (&buf[cnt * 100], '0' + cnt, 100);
 152       cbs[cnt].aio_nbytes = 100;
 153       cbs[cnt].aio_offset = cnt * 100;
 154       cbs[cnt].aio_sigevent.sigev_notify = SIGEV_NONE;
 155
 156       cbp[cnt] = &cbs[cnt];
 157     }
 158
 159   /* First a simple test.  */
 160   for (cnt = 10; cnt > 0; )
 161     if (aio_write (cbp[--cnt]) < 0 && errno == ENOSYS)
 162       {
 163         error (0, 0, "no aio support in this configuration");
 164         return 0;
 165       }
 166   /* Wait 'til the results are there.  */
 167   result |= do_wait (cbp, 10, 0);
 168   /* Test this.  */
 169   result |= test_file (buf, sizeof (buf), fd, "aio_write");
 170
 171   /* Read now as we've written it.  */
 172   memset (buf, '\0', sizeof (buf));
 173   /* Issue the commands.  */
 174   for (cnt = 10; cnt > 0; )
 175     {
 176       --cnt;
 177       cbp[cnt] = &cbs[cnt];
 178       aio_read (cbp[cnt]);
 179     }
 180   /* Wait 'til the results are there.  */
 181   result |= do_wait (cbp, 10, 0);
 182   /* Test this.  */
 183   for (cnt = 0; cnt < 1000; ++cnt)
 184     if (buf[cnt] != '0' + (cnt / 100))
 185       {
 186         result = 1;
 187         error (0, 0, "comparison failed for aio_read test");
 188         break;
 189       }
 190
 191   if (cnt == 1000)
 192     puts ("aio_read test ok");
 193
 194   /* Remove the test file contents.  */
 195   if (ftruncate (fd, 0) < 0)
 196     {
 197       error (0, errno, "ftruncate failed\n");
 198       result = 1;
 199     }
 200
 201   /* Test lio_listio.  */
 202   for (cnt = 0; cnt < 10; ++cnt)
 203     {
 204       cbs[cnt].aio_lio_opcode = LIO_WRITE;
 205       cbp[cnt] = &cbs[cnt];
 206     }
 207   /* Issue the command.  */
 208   lio_listio (LIO_WAIT, cbp, 10, NULL);
 209   /* ...and immediately test it since we started it in wait mode.  */
 210   result |= test_file (buf, sizeof (buf), fd, "lio_listio (write)");
 211
 212   /* Test aio_fsync.  */
 213   cbs_fsync.aio_fildes = fd;
 214   cbs_fsync.aio_sigevent.sigev_notify = SIGEV_NONE;
 215   cbp_fsync[0] = &cbs_fsync;
 216
 217   /* Remove the test file contents first.  */
 218   if (ftruncate (fd, 0) < 0)
 219     {
 220       error (0, errno, "ftruncate failed\n");
 221       result = 1;
 222     }
 223
 224   /* Write again.  */
 225   for (cnt = 10; cnt > 0; )
 226     aio_write (cbp[--cnt]);
 227
 228   if (aio_fsync (O_SYNC, &cbs_fsync) < 0)
 229     {
 230       error (0, errno, "aio_fsync failed\n");
 231       result = 1;
 232     }
 233   result |= do_wait (cbp_fsync, 1, 0);
 234
 235   /* ...and test since all data should be on disk now.  */
 236   result |= test_file (buf, sizeof (buf), fd, "aio_fsync (aio_write)");
 237
 238   /* Test aio_cancel.  */
 239   /* Remove the test file contents first.  */
 240   if (ftruncate (fd, 0) < 0)
 241     {
 242       error (0, errno, "ftruncate failed\n");
 243       result = 1;
 244     }
 245
 246   /* Write again.  */
 247   for (cnt = 10; cnt > 0; )
 248     aio_write (cbp[--cnt]);
 249
 250   /* Cancel all requests.  */
 251   if (aio_cancel (fd, NULL) == -1)
 252     printf ("aio_cancel (fd, NULL) cannot cancel anything\n");
 253
 254   result |= do_wait (cbp, 10, ECANCELED);
 255
 256   /* Another test for aio_cancel.  */
 257   /* Remove the test file contents first.  */
 258   if (ftruncate (fd, 0) < 0)
 259     {
 260       error (0, errno, "ftruncate failed\n");
 261       result = 1;
 262     }
 263
 264   /* Write again.  */
 265   for (cnt = 10; cnt > 0; )
 266     {
 267       --cnt;
 268       cbp[cnt] = &cbs[cnt];
 269       aio_write (cbp[cnt]);
 270     }
 271   puts ("finished3");
 272
 273   /* Cancel all requests.  */
 274   for (cnt = 10; cnt > 0; )
 275     if (aio_cancel (fd, cbp[--cnt]) == -1)
 276       /* This is not an error.  The request can simply be finished.  */
 277       printf ("aio_cancel (fd, cbp[%zd]) cannot be canceled\n", cnt);
 278   puts ("finished2");
 279
 280   result |= do_wait (cbp, 10, ECANCELED);
 281
 282   puts ("finished");
 283
 284   return result;
 285 }