tests/test-nbd.c

   1 /* nbdkit
   2  * Copyright Red Hat
   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
  42 #include <guestfs.h>
  43
  44 #include "test.h"
  45
  46 int
  47 main (int argc, char *argv[])
  48 {
  49   guestfs_h *g;
  50   int r;
  51   char *data;
  52   char *sockarg = NULL;
  53   size_t i, size;
  54
  55   /* Run an oldstyle nbdkit server. */
  56   if (test_start_nbdkit ("-o", "file", "file-data", NULL) == -1)
  57     exit (EXIT_FAILURE);
  58
  59   /* Now run a second (newstyle) server connecting to the oldstyle
  60    * server above.  Add shared=true on this handle to test that
  61    * feature.
  62    */
  63   if (asprintf (&sockarg, "socket=%s", sock) < 0) {
  64     perror ("asprintf");
  65     exit (EXIT_FAILURE);
  66   }
  67   if (test_start_nbdkit ("-e", "wrap", "nbd", sockarg,
  68                          "shared=true", NULL) == -1)
  69     exit (EXIT_FAILURE);
  70   free (sockarg);
  71
  72   /* And now run another oldstyle server connecting to the newstyle
  73    * server above, for a total of 3 nbdkit instances.
  74    */
  75   if (asprintf (&sockarg, "socket=%s", sock) < 0) {
  76     perror ("asprintf");
  77     exit (EXIT_FAILURE);
  78   }
  79   if (test_start_nbdkit ("-o", "nbd", sockarg, "export=wrap", NULL) == -1)
  80     exit (EXIT_FAILURE);
  81   free (sockarg);
  82
  83   /* Now connect to the front (oldstyle) server using libguestfs. */
  84   g = guestfs_create ();
  85   if (g == NULL) {
  86     perror ("guestfs_create");
  87     exit (EXIT_FAILURE);
  88   }
  89
  90   r = guestfs_add_drive_opts (g, "",
  91                               GUESTFS_ADD_DRIVE_OPTS_FORMAT, "raw",
  92                               GUESTFS_ADD_DRIVE_OPTS_PROTOCOL, "nbd",
  93                               GUESTFS_ADD_DRIVE_OPTS_SERVER, server,
  94                               -1);
  95   if (r == -1)
  96     exit (EXIT_FAILURE);
  97
  98   if (guestfs_launch (g) == -1)
  99     exit (EXIT_FAILURE);
 100
 101   /* Check the data in the file is \x01-\x08 repeated 512 times. */
 102   data = guestfs_pread_device (g, "/dev/sda", 8 * 512, 0, &size);
 103   if (!data)
 104     exit (EXIT_FAILURE);
 105   if (size != 8 * 512) {
 106     fprintf (stderr,
 107              "%s FAILED: unexpected size (actual: %zu, expected: 512)\n",
 108              program_name, size);
 109     exit (EXIT_FAILURE);
 110   }
 111
 112   for (i = 0; i < 512 * 8; i += 8) {
 113     if (data[i] != 1 || data[i+1] != 2 ||
 114         data[i+2] != 3 || data[i+3] != 4 ||
 115         data[i+4] != 5 || data[i+5] != 6 ||
 116         data[i+6] != 7 || data[i+7] != 8) {
 117       fprintf (stderr, "%s FAILED: unexpected data returned at offset %zu\n",
 118                program_name, i);
 119       exit (EXIT_FAILURE);
 120     }
 121   }
 122
 123   free (data);
 124
 125   guestfs_close (g);
 126   exit (EXIT_SUCCESS);
 127 }