tests/test-cxx-plugin.cpp

   1 /* nbdkit
   2  * Copyright (C) 2013-2020 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 #ifndef __cplusplus
  34 #error "this test should be compiled with a C++ compiler"
  35 #endif
  36
  37 #include <config.h>
  38
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42
  43 #include <nbdkit-plugin.h>
  44
  45 /* This looks like a 100MB disk with one empty partition. */
  46 static unsigned char bootsector[512] = {
  47   0xfa, 0xb8, 0x00, 0x10, 0x8e, 0xd0, 0xbc, 0x00,
  48   0xb0, 0xb8, 0x00, 0x00, 0x8e, 0xd8, 0x8e, 0xc0,
  49   0xfb, 0xbe, 0x00, 0x7c, 0xbf, 0x00, 0x06, 0xb9,
  50   0x00, 0x02, 0xf3, 0xa4, 0xea, 0x21, 0x06, 0x00,
  51   0x00, 0xbe, 0xbe, 0x07, 0x38, 0x04, 0x75, 0x0b,
  52   0x83, 0xc6, 0x10, 0x81, 0xfe, 0xfe, 0x07, 0x75,
  53   0xf3, 0xeb, 0x16, 0xb4, 0x02, 0xb0, 0x01, 0xbb,
  54   0x00, 0x7c, 0xb2, 0x80, 0x8a, 0x74, 0x01, 0x8b,
  55   0x4c, 0x02, 0xcd, 0x13, 0xea, 0x00, 0x7c, 0x00,
  56   0x00, 0xeb, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00,
  57   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  58   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  59   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  60   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  61   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  62   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  63   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  64   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  65   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  66   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  67   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  68   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  69   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  70   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  71   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  72   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  73   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  74   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  75   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  76   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  77   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  78   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  79   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  80   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  81   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  82   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  83   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  84   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  85   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  86   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  87   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  88   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  89   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  90   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  91   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  92   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  93   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  94   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  95   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  96   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  97   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  98   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  99   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 100   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 101   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 102   0xe1, 0x5b, 0x02, 0x00, 0x00, 0x00, 0x00, 0x02,
 103   0x03, 0x00, 0x83, 0xbc, 0x31, 0x0c, 0x80, 0x00,
 104   0x00, 0x00, 0x01, 0x1f, 0x03, 0x00, 0x00, 0x00,
 105   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 106   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 107   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 108   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 109   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 110   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa
 111 };
 112 static unsigned char data[104857600];
 113
 114 static void
 115 cxx_load (void)
 116 {
 117   memcpy (data, bootsector, sizeof bootsector);
 118 }
 119
 120 static void *
 121 cxx_open (int readonly)
 122 {
 123   return NBDKIT_HANDLE_NOT_NEEDED;
 124 }
 125
 126 static int64_t
 127 cxx_get_size (void *handle)
 128 {
 129   return (int64_t) sizeof (data);
 130 }
 131
 132 #define THREAD_MODEL NBDKIT_THREAD_MODEL_SERIALIZE_ALL_REQUESTS
 133
 134 static int
 135 cxx_pread (void *handle, void *buf, uint32_t count, uint64_t offset)
 136 {
 137   memcpy (buf, data+offset, count);
 138   return 0;
 139 }
 140
 141 /* https://bugzilla.redhat.com/show_bug.cgi?id=1418328#c9 */
 142 namespace {
 143   nbdkit_plugin create_plugin() {
 144     nbdkit_plugin plugin = nbdkit_plugin ();
 145     plugin.name = "cxx";
 146     plugin.version = PACKAGE_VERSION;
 147     plugin.load = cxx_load;
 148     plugin.open = cxx_open;
 149     plugin.get_size = cxx_get_size;
 150     plugin.pread = cxx_pread;
 151     return plugin;
 152   }
 153 }
 154 static struct nbdkit_plugin plugin = create_plugin ();
 155
 156 NBDKIT_REGISTER_PLUGIN(plugin)