tests/test-delay.c

   1 /* nbdkit
   2  * Copyright (C) 2018 Red Hat Inc.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *
  11  * * Redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditions and the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution.
  14  *
  15  * * Neither the name of Red Hat nor the names of its contributors may be
  16  * used to endorse or promote products derived from this software without
  17  * specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  21  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  22  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
  23  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  26  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  27  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  28  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  29  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <config.h>
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <stdint.h>
  38 #include <inttypes.h>
  39 #include <string.h>
  40 #include <unistd.h>
  41 #include <time.h>
  42
  43 #include <guestfs.h>
  44
  45 #include "test.h"
  46
  47 int
  48 main (int argc, char *argv[])
  49 {
  50   guestfs_h *g;
  51   int i, r;
  52   time_t start_t, end_t;
  53
  54   if (test_start_nbdkit ("--filter", "delay",
  55                          "memory", "1M",
  56                          "wdelay=10", NULL) == -1)
  57     exit (EXIT_FAILURE);
  58
  59   g = guestfs_create ();
  60   if (g == NULL) {
  61     perror ("guestfs_create");
  62     exit (EXIT_FAILURE);
  63   }
  64
  65   r = guestfs_add_drive_opts (g, "",
  66                               GUESTFS_ADD_DRIVE_OPTS_FORMAT, "raw",
  67                               GUESTFS_ADD_DRIVE_OPTS_PROTOCOL, "nbd",
  68                               GUESTFS_ADD_DRIVE_OPTS_SERVER, server,
  69                               -1);
  70   if (r == -1)
  71     exit (EXIT_FAILURE);
  72
  73   if (guestfs_launch (g) == -1)
  74     exit (EXIT_FAILURE);
  75
  76   /* Reads should work as normal.  Do lots of small reads here so
  77    * we will notice if they are being delayed.
  78    */
  79   for (i = 0; i < 100; ++i) {
  80     char *data;
  81     size_t n;
  82
  83     data = guestfs_pread_device (g, "/dev/sda", 512, 51200-512*i, &n);
  84     if (data == NULL)
  85       exit (EXIT_FAILURE);
  86     free (data);
  87   }
  88
  89   /* Writes should be delayed by >= 10 seconds. */
  90   time (&start_t);
  91   if (guestfs_pwrite_device (g, "/dev/sda", "hello", 5, 100000) == -1)
  92     exit (EXIT_FAILURE);
  93   if (guestfs_sync (g) == -1)
  94     exit (EXIT_FAILURE);
  95   time (&end_t);
  96
  97   if (end_t - start_t < 10) {
  98     fprintf (stderr, "%s FAILED: no write delay detected\n", program_name);
  99     exit (EXIT_FAILURE);
 100   }
 101
 102   guestfs_close (g);
 103   exit (EXIT_SUCCESS);
 104 }