rtkaio/tst-aiod.c

   1 /* Tests for AIO in librt.
   2    Copyright (C) 1998, 2000, 2002, 2006 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <aio.h>
  22 #include <errno.h>
  23 #include <error.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <sys/stat.h>
  28 #include "tst-aiod.h"
  29
  30
  31 /* Prototype for our test function.  */
  32 extern void do_prepare (int argc, char *argv[]);
  33 extern int do_test (int argc, char *argv[]);
  34
  35 /* We have a preparation function.  */
  36 #define PREPARE do_prepare
  37
  38 /* We might need a bit longer timeout.  */
  39 #define TIMEOUT 20 /* sec */
  40
  41 /* This defines the `main' function and some more.  */
  42 #include <test-skeleton.c>
  43
  44
  45 /* These are for the temporary file we generate.  */
  46 char *name;
  47 int fd;
  48 char *tmpbuf;
  49 int blksz = 100;
  50
  51 void
  52 do_prepare (int argc, char *argv[])
  53 {
  54   size_t name_len;
  55
  56   name_len = strlen (test_dir);
  57   name = malloc (name_len + sizeof ("/aioXXXXXX"));
  58   mempcpy (mempcpy (name, test_dir, name_len),
  59            "/aioXXXXXX", sizeof ("/aioXXXXXX"));
  60   add_temp_file (name);
  61
  62   /* Open our test file.   */
  63   fd = mkstemp (name);
  64   if (fd == -1)
  65     error (EXIT_FAILURE, errno, "cannot open test file `%s'", name);
  66
  67   int sz = set_o_direct (fd);
  68   if (sz != -1)
  69     {
  70       blksz = sz;
  71       printf ("Using O_DIRECT with block size %d\n", blksz);
  72     }
  73 }
  74
  75
  76 static int
  77 test_file (const void *buf, size_t size, int fd, const char *msg)
  78 {
  79   struct stat st;
  80   char *tmp = tmpbuf;
  81
  82   errno = 0;
  83   if (fstat (fd, &st) < 0)
  84     {
  85       error (0, errno, "%s: failed stat", msg);
  86       return 1;
  87     }
  88
  89   if (st.st_size != (off_t) size)
  90     {
  91       error (0, errno, "%s: wrong size: %lu, should be %lu",
  92              msg, (unsigned long int) st.st_size, (unsigned long int) size);
  93       return 1;
  94     }
  95
  96   if (pread (fd, tmp, size, 0) != (ssize_t) size)
  97     {
  98       error (0, errno, "%s: failed pread", msg);
  99       return 1;
 100     }
 101
 102   if (memcmp (buf, tmp, size) != 0)
 103     {
 104       error (0, errno, "%s: failed comparison", msg);
 105       return 1;
 106     }
 107
 108   printf ("%s test ok\n", msg);
 109
 110   return 0;
 111 }
 112
 113
 114 static int
 115 do_wait (struct aiocb **cbp, size_t nent, int allowed_err)
 116 {
 117   int go_on;
 118   size_t cnt;
 119   int result = 0;
 120
 121   do
 122     {
 123       aio_suspend ((const struct aiocb *const *) cbp, nent, NULL);
 124       go_on = 0;
 125       for (cnt = 0; cnt < nent; ++cnt)
 126         if (cbp[cnt] != NULL)
 127           {
 128             if (aio_error (cbp[cnt]) == EINPROGRESS)
 129               go_on = 1;
 130             else
 131               {
 132                 if (aio_return (cbp[cnt]) == -1
 133                     && (allowed_err == 0
 134                         || aio_error (cbp[cnt]) != allowed_err))
 135                   {
 136                     error (0, aio_error (cbp[cnt]), "Operation failed\n");
 137                     result = 1;
 138                   }
 139                 cbp[cnt] = NULL;
 140               }
 141           }
 142     }
 143   while (go_on);
 144
 145   return result;
 146 }
 147
 148
 149 int
 150 do_test (int argc, char *argv[])
 151 {
 152   struct aiocb cbs[10];
 153   struct aiocb cbs_fsync;
 154   struct aiocb *cbp[10];
 155   struct aiocb *cbp_fsync[1];
 156   char *buf;
 157   size_t cnt;
 158   int result = 0;
 159
 160   buf = mmap (NULL, 20 * blksz, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
 161   tmpbuf = buf + 10 * blksz;
 162   if (buf == MAP_FAILED)
 163     {
 164       error (0, errno, "mmap failed");
 165       return 1;
 166     }
 167
 168   /* Preparation.  */
 169   for (cnt = 0; cnt < 10; ++cnt)
 170     {
 171       cbs[cnt].aio_fildes = fd;
 172       cbs[cnt].aio_reqprio = 0;
 173       cbs[cnt].aio_buf = memset (&buf[cnt * blksz], '0' + cnt, blksz);
 174       cbs[cnt].aio_nbytes = blksz;
 175       cbs[cnt].aio_offset = cnt * blksz;
 176       cbs[cnt].aio_sigevent.sigev_notify = SIGEV_NONE;
 177
 178       cbp[cnt] = &cbs[cnt];
 179     }
 180
 181   /* First a simple test.  */
 182   for (cnt = 10; cnt > 0; )
 183     if (aio_write (cbp[--cnt]) < 0 && errno == ENOSYS)
 184       {
 185         error (0, 0, "no aio support in this configuration");
 186         return 0;
 187       }
 188   /* Wait 'til the results are there.  */
 189   result |= do_wait (cbp, 10, 0);
 190   /* Test this.  */
 191   result |= test_file (buf, 10 * blksz, fd, "aio_write");
 192
 193   /* Read now as we've written it.  */
 194   memset (buf, '\0', 10 * blksz);
 195   /* Issue the commands.  */
 196   for (cnt = 10; cnt > 0; )
 197     {
 198       --cnt;
 199       cbp[cnt] = &cbs[cnt];
 200       aio_read (cbp[cnt]);
 201     }
 202   /* Wait 'til the results are there.  */
 203   result |= do_wait (cbp, 10, 0);
 204   /* Test this.  */
 205   for (cnt = 0; cnt < 10 * blksz; ++cnt)
 206     if (buf[cnt] != '0' + (cnt / blksz))
 207       {
 208         result = 1;
 209         error (0, 0, "comparison failed for aio_read test");
 210         break;
 211       }
 212
 213   if (cnt == 10 * blksz)
 214     puts ("aio_read test ok");
 215
 216   /* Remove the test file contents.  */
 217   if (ftruncate (fd, 0) < 0)
 218     {
 219       error (0, errno, "ftruncate failed\n");
 220       result = 1;
 221     }
 222
 223   /* Test lio_listio.  */
 224   for (cnt = 0; cnt < 10; ++cnt)
 225     {
 226       cbs[cnt].aio_lio_opcode = LIO_WRITE;
 227       cbp[cnt] = &cbs[cnt];
 228     }
 229   /* Issue the command.  */
 230   lio_listio (LIO_WAIT, cbp, 10, NULL);
 231   /* ...and immediately test it since we started it in wait mode.  */
 232   result |= test_file (buf, 10 * blksz, fd, "lio_listio (write)");
 233
 234   /* Test aio_fsync.  */
 235   cbs_fsync.aio_fildes = fd;
 236   cbs_fsync.aio_sigevent.sigev_notify = SIGEV_NONE;
 237   cbp_fsync[0] = &cbs_fsync;
 238
 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   if (aio_fsync (O_SYNC, &cbs_fsync) < 0)
 251     {
 252       error (0, errno, "aio_fsync failed\n");
 253       result = 1;
 254     }
 255   result |= do_wait (cbp_fsync, 1, 0);
 256
 257   /* ...and test since all data should be on disk now.  */
 258   result |= test_file (buf, 10 * blksz, fd, "aio_fsync (aio_write)");
 259
 260   /* Test 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     aio_write (cbp[--cnt]);
 271
 272   /* Cancel all requests.  */
 273   if (aio_cancel (fd, NULL) == -1)
 274     printf ("aio_cancel (fd, NULL) cannot cancel anything\n");
 275
 276   result |= do_wait (cbp, 10, ECANCELED);
 277
 278   /* Another test for aio_cancel.  */
 279   /* Remove the test file contents first.  */
 280   if (ftruncate (fd, 0) < 0)
 281     {
 282       error (0, errno, "ftruncate failed\n");
 283       result = 1;
 284     }
 285
 286   /* Write again.  */
 287   for (cnt = 10; cnt > 0; )
 288     {
 289       --cnt;
 290       cbp[cnt] = &cbs[cnt];
 291       aio_write (cbp[cnt]);
 292     }
 293   puts ("finished3");
 294
 295   /* Cancel all requests.  */
 296   for (cnt = 10; cnt > 0; )
 297     if (aio_cancel (fd, cbp[--cnt]) == -1)
 298       /* This is not an error.  The request can simply be finished.  */
 299       printf ("aio_cancel (fd, cbp[%Zd]) cannot be canceled\n", cnt);
 300   puts ("finished2");
 301
 302   result |= do_wait (cbp, 10, ECANCELED);
 303
 304   puts ("finished");
 305
 306   return result;
 307 }