/src/libvshadow/libvshadow/libvshadow_block_descriptor.c

Source (jump to first uncovered line)
/*
 * Block descriptor functions
 *
 * Copyright (C) 2011-2023, Joachim Metz <joachim.metz@gmail.com>
 *
 * Refer to AUTHORS for acknowledgements.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <common.h>
#include <memory.h>
#include <types.h>

#include "libvshadow_block_descriptor.h"
#include "libvshadow_debug.h"
#include "libvshadow_definitions.h"
#include "libvshadow_libcerror.h"
#include "libvshadow_libcnotify.h"
#include "libvshadow_unused.h"

#include "vshadow_store.h"

const uint8_t vshadow_empty_store_block_list_entry[ 32 ] = {
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

/* Creates a block descriptor
 * Make sure the value block_descriptor is referencing, is set to NULL
 * Returns 1 if successful or -1 on error
 */
int libvshadow_block_descriptor_initialize(
     libvshadow_block_descriptor_t **block_descriptor,
     libcerror_error_t **error )
{
  static char *function = "libvshadow_block_descriptor_initialize";

  if( block_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid block descriptor.",
     function );

    return( -1 );
  }
  if( *block_descriptor != NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
     "%s: invalid block descriptor value already set.",
     function );

    return( -1 );
  }
  *block_descriptor = memory_allocate_structure(
                       libvshadow_block_descriptor_t );

  if( *block_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
     "%s: unable to create block descriptor.",
     function );

    goto on_error;
  }
  if( memory_set(
       *block_descriptor,
       0,
       sizeof( libvshadow_block_descriptor_t ) ) == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_SET_FAILED,
     "%s: unable to clear block descriptor.",
     function );

    goto on_error;
  }
  ( *block_descriptor )->index         = -1;
  ( *block_descriptor )->reverse_index = -1;

  return( 1 );

on_error:
  if( *block_descriptor != NULL )
  {
    memory_free(
     *block_descriptor );

    *block_descriptor = NULL;
  }
  return( -1 );
}

/* Frees a block descriptor
 * Returns 1 if successful or -1 on error
 */
int libvshadow_block_descriptor_free(
     libvshadow_block_descriptor_t **block_descriptor,
     libcerror_error_t **error )
{
  static char *function = "libvshadow_block_descriptor_free";
  int result            = 1;

  if( block_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid block descriptor.",
     function );

    return( -1 );
  }
  if( *block_descriptor != NULL )
  {
    if( ( *block_descriptor )->overlay != NULL )
    {
      if( libvshadow_block_descriptor_free(
           &( ( *block_descriptor )->overlay ),
           error ) != 1 )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_RUNTIME,
         LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,
         "%s: unable to free overlay block descriptor.",
         function );

        result = -1;
      }
    }
    memory_free(
     *block_descriptor );

    *block_descriptor = NULL;
  }
  return( result );
}

/* Frees a block descriptor if stored in the reverse block tree only
 * Returns 1 if successful or -1 on error
 */
int libvshadow_block_descriptor_free_reverse(
     libvshadow_block_descriptor_t **block_descriptor,
     libcerror_error_t **error )
{
  static char *function = "libvshadow_block_descriptor_free_reverse";
  int result            = 1;

  if( block_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid block descriptor.",
     function );

    return( -1 );
  }
  if( ( *block_descriptor != NULL )
   && ( ( *block_descriptor )->index == -1 ) )
  {
    if( ( *block_descriptor )->overlay != NULL )
    {
      if( libvshadow_block_descriptor_free(
           &( ( *block_descriptor )->overlay ),
           error ) != 1 )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_RUNTIME,
         LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,
         "%s: unable to free overlay block descriptor.",
         function );

        result = -1;
      }
    }
    memory_free(
     *block_descriptor );

    *block_descriptor = NULL;
  }
  return( result );
}

/* Clones a block descriptor
 * Make sure the value destination_block_descriptor is pointing to is set to NULL
 * Returns 1 if successful or -1 on error
 */
int libvshadow_block_descriptor_clone(
     libvshadow_block_descriptor_t **destination_block_descriptor,
     libvshadow_block_descriptor_t *source_block_descriptor,
     libcerror_error_t **error )
{
  static char *function = "libvshadow_block_descriptor_clone";

  if( destination_block_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid destination block descriptor.",
     function );

    return( -1 );
  }
  if( *destination_block_descriptor != NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
     "%s: invalid destination block descriptor value already set.",
     function );

    return( -1 );
  }
  if( source_block_descriptor == NULL )
  {
    *destination_block_descriptor = NULL;

    return( 1 );
  }
  *destination_block_descriptor = memory_allocate_structure(
                                   libvshadow_block_descriptor_t );

  if( *destination_block_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
     "%s: unable to create destination block descriptor.",
     function );

    goto on_error;
  }
  if( memory_copy(
       *destination_block_descriptor,
       source_block_descriptor,
       sizeof( libvshadow_block_descriptor_t ) ) == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_COPY_FAILED,
     "%s: unable to copy block descriptor.",
     function );

    goto on_error;
  }
  if( source_block_descriptor->overlay != NULL )
  {
    if( libvshadow_block_descriptor_clone(
         &( ( *destination_block_descriptor )->overlay ),
         source_block_descriptor->overlay,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
       "%s: unable to create destination overlay block descriptor.",
       function );

      goto on_error;
    }
  }
  ( *destination_block_descriptor )->index         = -1;
  ( *destination_block_descriptor )->reverse_index = -1;

  return( 1 );

on_error:
  if( *destination_block_descriptor != NULL )
  {
    memory_free(
     *destination_block_descriptor );

    *destination_block_descriptor = NULL;
  }
  return( -1 );
}

/* Reads the block descriptor
 * Returns 1 if successful, 0 if block list entry is empty or -1 on error
 */
int libvshadow_block_descriptor_read_data(
     libvshadow_block_descriptor_t *block_descriptor,
     const uint8_t *data,
     size_t data_size,
     int store_index LIBVSHADOW_ATTRIBUTE_UNUSED,
     libcerror_error_t **error )
{
  static char *function = "libvshadow_block_descriptor_read_data";

  LIBVSHADOW_UNREFERENCED_PARAMETER( store_index )

  if( block_descriptor == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid block descriptor.",
     function );

    return( -1 );
  }
  if( data == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid data.",
     function );

    return( -1 );
  }
  if( ( data_size < sizeof( vshadow_store_block_list_entry_t ) )
   || ( data_size > (size_t) SSIZE_MAX ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid data size value out of bounds.",
     function );

    return( -1 );
  }
  if( memory_compare(
       data,
             vshadow_empty_store_block_list_entry,
             sizeof( vshadow_store_block_list_entry_t ) ) == 0 )
  {
    return( 0 );
  }
#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: store: %02d data:\n",
     function,
     store_index );
    libcnotify_print_data(
     data,
     sizeof( vshadow_store_block_list_entry_t ),
     0 );
  }
#endif
  byte_stream_copy_to_uint64_little_endian(
   ( (vshadow_store_block_list_entry_t *) data )->original_offset,
   block_descriptor->original_offset );

  byte_stream_copy_to_uint64_little_endian(
   ( (vshadow_store_block_list_entry_t *) data )->relative_offset,
   block_descriptor->relative_offset );

  byte_stream_copy_to_uint64_little_endian(
   ( (vshadow_store_block_list_entry_t *) data )->offset,
   block_descriptor->offset );

  byte_stream_copy_to_uint32_little_endian(
   ( (vshadow_store_block_list_entry_t *) data )->flags,
   block_descriptor->flags );

  byte_stream_copy_to_uint32_little_endian(
   ( (vshadow_store_block_list_entry_t *) data )->allocation_bitmap,
   block_descriptor->bitmap );

#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: store: %02d original offset\t: 0x%08" PRIx64 "\n",
     function,
     store_index,
     block_descriptor->original_offset );

    libcnotify_printf(
     "%s: store: %02d relative offset\t: 0x%08" PRIx64 "\n",
     function,
     store_index,
     block_descriptor->relative_offset );

    libcnotify_printf(
     "%s: store: %02d offset\t\t\t: 0x%08" PRIx64 "\n",
     function,
     store_index,
     block_descriptor->offset );

    libcnotify_printf(
     "%s: store: %02d flags\t\t\t: 0x%08" PRIx32 "\n",
     function,
     store_index,
     block_descriptor->flags );

    libcnotify_printf(
     "%s: store: %02d allocation bitmap\t: 0x%08" PRIx32 "\n",
     function,
     store_index,
     block_descriptor->bitmap );

    libcnotify_printf(
     "\n" );
  }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */

  if( ( block_descriptor->flags & LIBVSHADOW_BLOCK_FLAG_IS_FORWARDER ) != 0 )
  {
    if( block_descriptor->offset != 0 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
       "%s: unsupported offset - value not zero.",
       function );

      return( -1 );
    }
  }
  return( 1 );
}


Coverage Report

Created: 2023-06-07 06:53

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Block descriptor functions
3		*
4		* Copyright (C) 2011-2023, Joachim Metz <joachim.metz@gmail.com>
5		*
6		* Refer to AUTHORS for acknowledgements.
7		*
8		* This program is free software: you can redistribute it and/or modify
9		* it under the terms of the GNU Lesser General Public License as published by
10		* the Free Software Foundation, either version 3 of the License, or
11		* (at your option) any later version.
12		*
13		* This program is distributed in the hope that it will be useful,
14		* but WITHOUT ANY WARRANTY; without even the implied warranty of
15		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16		* GNU General Public License for more details.
17		*
18		* You should have received a copy of the GNU Lesser General Public License
19		* along with this program. If not, see <https://www.gnu.org/licenses/>.
20		*/
21
22		#include <common.h>
23		#include <memory.h>
24		#include <types.h>
25
26		#include "libvshadow_block_descriptor.h"
27		#include "libvshadow_debug.h"
28		#include "libvshadow_definitions.h"
29		#include "libvshadow_libcerror.h"
30		#include "libvshadow_libcnotify.h"
31		#include "libvshadow_unused.h"
32
33		#include "vshadow_store.h"
34
35		const uint8_t vshadow_empty_store_block_list_entry[ 32 ] = {
36		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
37		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
38
39		/* Creates a block descriptor
40		* Make sure the value block_descriptor is referencing, is set to NULL
41		* Returns 1 if successful or -1 on error
42		*/
43		int libvshadow_block_descriptor_initialize(
44		libvshadow_block_descriptor_t **block_descriptor,
45		libcerror_error_t **error )
46	859	{
47	859	static char *function = "libvshadow_block_descriptor_initialize";
48
49	859	if( block_descriptor == NULL )
50	0	{
51	0	libcerror_error_set(
52	0	error,
53	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
54	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
55	0	"%s: invalid block descriptor.",
56	0	function );
57
58	0	return( -1 );
59	0	}
60	859	if( *block_descriptor != NULL )
61	0	{
62	0	libcerror_error_set(
63	0	error,
64	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
65	0	LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
66	0	"%s: invalid block descriptor value already set.",
67	0	function );
68
69	0	return( -1 );
70	0	}
71	859	*block_descriptor = memory_allocate_structure(
72	859	libvshadow_block_descriptor_t );
73
74	859	if( *block_descriptor == NULL )
75	0	{
76	0	libcerror_error_set(
77	0	error,
78	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
79	0	LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
80	0	"%s: unable to create block descriptor.",
81	0	function );
82
83	0	goto on_error;
84	0	}
85	859	if( memory_set(
86	859	*block_descriptor,
87	859	0,
88	859	sizeof( libvshadow_block_descriptor_t ) ) == NULL )
89	0	{
90	0	libcerror_error_set(
91	0	error,
92	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
93	0	LIBCERROR_MEMORY_ERROR_SET_FAILED,
94	0	"%s: unable to clear block descriptor.",
95	0	function );
96
97	0	goto on_error;
98	0	}
99	859	( *block_descriptor )->index = -1;
100	859	( *block_descriptor )->reverse_index = -1;
101
102	859	return( 1 );
103
104	0	on_error:
105	0	if( *block_descriptor != NULL )
106	0	{
107	0	memory_free(
108	0	*block_descriptor );
109
110	0	*block_descriptor = NULL;
111	0	}
112	0	return( -1 );
113	859	}
114
115		/* Frees a block descriptor
116		* Returns 1 if successful or -1 on error
117		*/
118		int libvshadow_block_descriptor_free(
119		libvshadow_block_descriptor_t **block_descriptor,
120		libcerror_error_t **error )
121	859	{
122	859	static char *function = "libvshadow_block_descriptor_free";
123	859	int result = 1;
124
125	859	if( block_descriptor == NULL )
126	0	{
127	0	libcerror_error_set(
128	0	error,
129	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
130	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
131	0	"%s: invalid block descriptor.",
132	0	function );
133
134	0	return( -1 );
135	0	}
136	859	if( *block_descriptor != NULL )
137	859	{
138	859	if( ( *block_descriptor )->overlay != NULL )
139	0	{
140	0	if( libvshadow_block_descriptor_free(
141	0	&( ( *block_descriptor )->overlay ),
142	0	error ) != 1 )
143	0	{
144	0	libcerror_error_set(
145	0	error,
146	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
147	0	LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,
148	0	"%s: unable to free overlay block descriptor.",
149	0	function );
150
151	0	result = -1;
152	0	}
153	0	}
154	859	memory_free(
155	859	*block_descriptor );
156
157	859	*block_descriptor = NULL;
158	859	}
159	859	return( result );
160	859	}
161
162		/* Frees a block descriptor if stored in the reverse block tree only
163		* Returns 1 if successful or -1 on error
164		*/
165		int libvshadow_block_descriptor_free_reverse(
166		libvshadow_block_descriptor_t **block_descriptor,
167		libcerror_error_t **error )
168	0	{
169	0	static char *function = "libvshadow_block_descriptor_free_reverse";
170	0	int result = 1;
171
172	0	if( block_descriptor == NULL )
173	0	{
174	0	libcerror_error_set(
175	0	error,
176	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
177	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
178	0	"%s: invalid block descriptor.",
179	0	function );
180
181	0	return( -1 );
182	0	}
183	0	if( ( *block_descriptor != NULL )
184	0	&& ( ( *block_descriptor )->index == -1 ) )
185	0	{
186	0	if( ( *block_descriptor )->overlay != NULL )
187	0	{
188	0	if( libvshadow_block_descriptor_free(
189	0	&( ( *block_descriptor )->overlay ),
190	0	error ) != 1 )
191	0	{
192	0	libcerror_error_set(
193	0	error,
194	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
195	0	LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,
196	0	"%s: unable to free overlay block descriptor.",
197	0	function );
198
199	0	result = -1;
200	0	}
201	0	}
202	0	memory_free(
203	0	*block_descriptor );
204
205	0	*block_descriptor = NULL;
206	0	}
207	0	return( result );
208	0	}
209
210		/* Clones a block descriptor
211		* Make sure the value destination_block_descriptor is pointing to is set to NULL
212		* Returns 1 if successful or -1 on error
213		*/
214		int libvshadow_block_descriptor_clone(
215		libvshadow_block_descriptor_t **destination_block_descriptor,
216		libvshadow_block_descriptor_t *source_block_descriptor,
217		libcerror_error_t **error )
218	0	{
219	0	static char *function = "libvshadow_block_descriptor_clone";
220
221	0	if( destination_block_descriptor == NULL )
222	0	{
223	0	libcerror_error_set(
224	0	error,
225	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
226	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
227	0	"%s: invalid destination block descriptor.",
228	0	function );
229
230	0	return( -1 );
231	0	}
232	0	if( *destination_block_descriptor != NULL )
233	0	{
234	0	libcerror_error_set(
235	0	error,
236	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
237	0	LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
238	0	"%s: invalid destination block descriptor value already set.",
239	0	function );
240
241	0	return( -1 );
242	0	}
243	0	if( source_block_descriptor == NULL )
244	0	{
245	0	*destination_block_descriptor = NULL;
246
247	0	return( 1 );
248	0	}
249	0	*destination_block_descriptor = memory_allocate_structure(
250	0	libvshadow_block_descriptor_t );
251
252	0	if( *destination_block_descriptor == NULL )
253	0	{
254	0	libcerror_error_set(
255	0	error,
256	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
257	0	LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
258	0	"%s: unable to create destination block descriptor.",
259	0	function );
260
261	0	goto on_error;
262	0	}
263	0	if( memory_copy(
264	0	*destination_block_descriptor,
265	0	source_block_descriptor,
266	0	sizeof( libvshadow_block_descriptor_t ) ) == NULL )
267	0	{
268	0	libcerror_error_set(
269	0	error,
270	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
271	0	LIBCERROR_MEMORY_ERROR_COPY_FAILED,
272	0	"%s: unable to copy block descriptor.",
273	0	function );
274
275	0	goto on_error;
276	0	}
277	0	if( source_block_descriptor->overlay != NULL )
278	0	{
279	0	if( libvshadow_block_descriptor_clone(
280	0	&( ( *destination_block_descriptor )->overlay ),
281	0	source_block_descriptor->overlay,
282	0	error ) != 1 )
283	0	{
284	0	libcerror_error_set(
285	0	error,
286	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
287	0	LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
288	0	"%s: unable to create destination overlay block descriptor.",
289	0	function );
290
291	0	goto on_error;
292	0	}
293	0	}
294	0	( *destination_block_descriptor )->index = -1;
295	0	( *destination_block_descriptor )->reverse_index = -1;
296
297	0	return( 1 );
298
299	0	on_error:
300	0	if( *destination_block_descriptor != NULL )
301	0	{
302	0	memory_free(
303	0	*destination_block_descriptor );
304
305	0	*destination_block_descriptor = NULL;
306	0	}
307	0	return( -1 );
308	0	}
309
310		/* Reads the block descriptor
311		* Returns 1 if successful, 0 if block list entry is empty or -1 on error
312		*/
313		int libvshadow_block_descriptor_read_data(
314		libvshadow_block_descriptor_t *block_descriptor,
315		const uint8_t *data,
316		size_t data_size,
317		int store_index LIBVSHADOW_ATTRIBUTE_UNUSED,
318		libcerror_error_t **error )
319	0	{
320	0	static char *function = "libvshadow_block_descriptor_read_data";
321
322	0	LIBVSHADOW_UNREFERENCED_PARAMETER( store_index )
323
324	0	if( block_descriptor == NULL )
325	0	{
326	0	libcerror_error_set(
327	0	error,
328	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
329	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
330	0	"%s: invalid block descriptor.",
331	0	function );
332
333	0	return( -1 );
334	0	}
335	0	if( data == NULL )
336	0	{
337	0	libcerror_error_set(
338	0	error,
339	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
340	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
341	0	"%s: invalid data.",
342	0	function );
343
344	0	return( -1 );
345	0	}
346	0	if( ( data_size < sizeof( vshadow_store_block_list_entry_t ) )
347	0	\|\| ( data_size > (size_t) SSIZE_MAX ) )
348	0	{
349	0	libcerror_error_set(
350	0	error,
351	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
352	0	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
353	0	"%s: invalid data size value out of bounds.",
354	0	function );
355
356	0	return( -1 );
357	0	}
358	0	if( memory_compare(
359	0	data,
360	0	vshadow_empty_store_block_list_entry,
361	0	sizeof( vshadow_store_block_list_entry_t ) ) == 0 )
362	0	{
363	0	return( 0 );
364	0	}
365		#if defined( HAVE_DEBUG_OUTPUT )
366		if( libcnotify_verbose != 0 )
367		{
368		libcnotify_printf(
369		"%s: store: %02d data:\n",
370		function,
371		store_index );
372		libcnotify_print_data(
373		data,
374		sizeof( vshadow_store_block_list_entry_t ),
375		0 );
376		}
377		#endif
378	0	byte_stream_copy_to_uint64_little_endian(
379	0	( (vshadow_store_block_list_entry_t *) data )->original_offset,
380	0	block_descriptor->original_offset );
381
382	0	byte_stream_copy_to_uint64_little_endian(
383	0	( (vshadow_store_block_list_entry_t *) data )->relative_offset,
384	0	block_descriptor->relative_offset );
385
386	0	byte_stream_copy_to_uint64_little_endian(
387	0	( (vshadow_store_block_list_entry_t *) data )->offset,
388	0	block_descriptor->offset );
389
390	0	byte_stream_copy_to_uint32_little_endian(
391	0	( (vshadow_store_block_list_entry_t *) data )->flags,
392	0	block_descriptor->flags );
393
394	0	byte_stream_copy_to_uint32_little_endian(
395	0	( (vshadow_store_block_list_entry_t *) data )->allocation_bitmap,
396	0	block_descriptor->bitmap );
397
398		#if defined( HAVE_DEBUG_OUTPUT )
399		if( libcnotify_verbose != 0 )
400		{
401		libcnotify_printf(
402		"%s: store: %02d original offset\t: 0x%08" PRIx64 "\n",
403		function,
404		store_index,
405		block_descriptor->original_offset );
406
407		libcnotify_printf(
408		"%s: store: %02d relative offset\t: 0x%08" PRIx64 "\n",
409		function,
410		store_index,
411		block_descriptor->relative_offset );
412
413		libcnotify_printf(
414		"%s: store: %02d offset\t\t\t: 0x%08" PRIx64 "\n",
415		function,
416		store_index,
417		block_descriptor->offset );
418
419		libcnotify_printf(
420		"%s: store: %02d flags\t\t\t: 0x%08" PRIx32 "\n",
421		function,
422		store_index,
423		block_descriptor->flags );
424
425		libcnotify_printf(
426		"%s: store: %02d allocation bitmap\t: 0x%08" PRIx32 "\n",
427		function,
428		store_index,
429		block_descriptor->bitmap );
430
431		libcnotify_printf(
432		"\n" );
433		}
434		#endif /* defined( HAVE_DEBUG_OUTPUT ) */
435
436	0	if( ( block_descriptor->flags & LIBVSHADOW_BLOCK_FLAG_IS_FORWARDER ) != 0 )
437	0	{
438	0	if( block_descriptor->offset != 0 )
439	0	{
440	0	libcerror_error_set(
441	0	error,
442	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
443	0	LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
444	0	"%s: unsupported offset - value not zero.",
445	0	function );
446
447	0	return( -1 );
448	0	}
449	0	}
450	0	return( 1 );
451	0	}
452