/* Retrieves an extent at a specific offset from the extent table
* Returns 1 if successful, 0 if not or -1 on error
*/
int libvmdk_extent_table_get_extent_at_offset(
libvmdk_extent_table_t *extent_table,
off64_t offset,
int *file_io_pool_entry,
size64_t *extent_file_size,
libcerror_error_t **error )
{
static char *function = "libvmdk_extent_table_get_extent_at_offset";
off64_t element_offset = 0;
off64_t extent_file_data_offset = 0;
uint32_t element_flags = 0;
int extent_index = 0;
int result = 0;
if( extent_table == NULL )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid extent table.",
function );
return( -1 );
}
result = libfdata_list_get_element_at_offset(
extent_table->extent_files_list,
offset,
&extent_index,
&extent_file_data_offset,
file_io_pool_entry,
&element_offset,
extent_file_size,
&element_flags,
error );
if( result == -1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_GET_FAILED,
"%s: unable to retrieve element at offset: %" PRIi64 " from extent files list.",
function,
offset );
return( -1 );
}
return( result );
}
/* Determines if the grain at a specific offset is sparse
* Returns 1 if the grain is sparse, 0 if not or -1 on error
*/
int libvmdk_grain_table_grain_is_sparse_at_offset(
libvmdk_grain_table_t *grain_table,
uint64_t grain_index,
libbfio_pool_t *file_io_pool,
libvmdk_extent_table_t *extent_table,
off64_t offset,
libcerror_error_t **error )
{
libvmdk_extent_file_t *extent_file = NULL;
libfdata_list_t *grains_list = NULL;
static char *function = "libvmdk_grain_table_grain_is_sparse_at_offset";
off64_t extent_file_data_offset = 0;
off64_t grain_data_offset = 0;
off64_t grain_group_data_offset = 0;
off64_t grain_offset = 0;
size64_t grain_size = 0;
uint32_t grain_flags = 0;
int extent_number = 0;
int grain_file_index = 0;
int grain_groups_list_index = 0;
int grains_list_index = 0;
int result = 0;
if( grain_table == NULL )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid grain table.",
function );
return( -1 );
}
result = libvmdk_extent_table_get_extent_file_at_offset(
extent_table,
offset,
file_io_pool,
&extent_number,
&extent_file_data_offset,
&extent_file,
error );
if( result != 1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_GET_FAILED,
"%s: unable to retrieve extent file at offset: %" PRIi64 " from extent table.",
function,
offset );
return( -1 );
}
if( extent_file == NULL )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
"%s: missing extent file.",
function );
return( -1 );
}
result = libvmdk_extent_file_grain_group_is_sparse_at_offset(
extent_file,
extent_file_data_offset,
&grain_groups_list_index,
&grain_group_data_offset,
error );
if( result == -1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_GET_FAILED,
"%s: unable to retrieve grain group from extent file: %d at offset: %" PRIi64 ".",
function,
extent_number,
extent_file_data_offset );
return( -1 );
}
else if( result != 0 )
{
return( 1 );
}
result = libvmdk_extent_file_get_grain_group_at_offset(
extent_file,
file_io_pool,
extent_file_data_offset,
&grain_groups_list_index,
&grain_group_data_offset,
&grains_list,
error );
if( result != 1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_GET_FAILED,
"%s: unable to retrieve grain group from extent file: %d at offset: %" PRIi64 ".",
function,
extent_number,
extent_file_data_offset );
return( -1 );
}
result = libfdata_list_get_element_at_offset(
grains_list,
grain_group_data_offset,
&grains_list_index,
&grain_data_offset,
&grain_file_index,
&grain_offset,
&grain_size,
&grain_flags,
error );
if( result != 1 )
{
libcerror_error_set(
error,
LIBCERROR_ERROR_DOMAIN_RUNTIME,
LIBCERROR_RUNTIME_ERROR_GET_FAILED,
"%s: unable to retrieve grain: %" PRIu64 " from grain group: %d in extent file: %d at offset: %" PRIi64 ".",
function,
grain_index,
grain_groups_list_index,
extent_number,
extent_file_data_offset );
return( -1 );
}
if( ( grain_flags & LIBVMDK_RANGE_FLAG_IS_SPARSE ) != 0 )
{
return( 1 );
}
return( 0 );
}
