/src/libfsext/libfsext/libfsext_superblock.c

Source
/*
 * Superblock functions
 *
 * Copyright (C) 2010-2026, 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 <byte_stream.h>
#include <memory.h>
#include <narrow_string.h>
#include <system_string.h>
#include <types.h>
#include <wide_string.h>

#include "libfsext_checksum.h"
#include "libfsext_debug.h"
#include "libfsext_definitions.h"
#include "libfsext_libbfio.h"
#include "libfsext_libcerror.h"
#include "libfsext_libcnotify.h"
#include "libfsext_libfdatetime.h"
#include "libfsext_libfguid.h"
#include "libfsext_libuna.h"
#include "libfsext_superblock.h"

#include "fsext_superblock.h"

const char *fsext_superblock_signature = "\x53\xef";

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

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

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

    return( -1 );
  }
  *superblock = memory_allocate_structure(
                 libfsext_superblock_t );

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

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

    goto on_error;
  }
  return( 1 );

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

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

/* Frees a superblock
 * Returns 1 if successful or -1 on error
 */
int libfsext_superblock_free(
     libfsext_superblock_t **superblock,
     libcerror_error_t **error )
{
  static char *function = "libfsext_superblock_free";

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

    return( -1 );
  }
  if( *superblock != NULL )
  {
    memory_free(
     *superblock );

    *superblock = NULL;
  }
  return( 1 );
}

/* Reads the superblock data
 * Returns 1 if successful, 0 if signature does not match or -1 on error
 */
int libfsext_superblock_read_data(
     libfsext_superblock_t *superblock,
     const uint8_t *data,
     size_t data_size,
     libcerror_error_t **error )
{
  static char *function                         = "libfsext_superblock_read_data";
  uint32_t calculated_checksum                  = 0;
  uint32_t stored_checksum                      = 0;
  uint32_t supported_feature_flags              = 0;
  uint8_t checksum_type                         = 0;
  uint8_t number_of_block_groups_per_flex_group = 0;

#if defined( HAVE_DEBUG_OUTPUT )
  uint64_t value_64bit                          = 0;
  uint32_t value_32bit                          = 0;
  uint16_t value_16bit                          = 0;
#endif

  if( superblock == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid superblock.",
     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( fsext_superblock_ext2_t ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_TOO_SMALL,
     "%s: invalid data size value too small.",
     function );

    return( -1 );
  }
  if( data_size > (size_t) SSIZE_MAX )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_EXCEEDS_MAXIMUM,
     "%s: invalid data size value exceeds maximum.",
     function );

    return( -1 );
  }
#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: superblock data:\n",
     function );
    libcnotify_print_data(
     data,
     sizeof( fsext_superblock_ext2_t ),
     LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );
  }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */

  if( memory_compare(
       ( (fsext_superblock_ext2_t *) data )->signature,
       fsext_superblock_signature,
       2 ) != 0 )
  {
    return( 0 );
  }
  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->number_of_inodes,
   superblock->number_of_inodes );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->number_of_blocks,
   superblock->number_of_blocks );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->number_of_reserved_blocks,
   superblock->number_of_reserved_blocks );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->number_of_unallocated_blocks,
   superblock->number_of_unallocated_blocks );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->number_of_unallocated_inodes,
   superblock->number_of_unallocated_inodes );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->block_size,
   superblock->block_size );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->number_of_blocks_per_block_group,
   superblock->number_of_blocks_per_block_group );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->format_revision,
   superblock->format_revision );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->number_of_inodes_per_block_group,
   superblock->number_of_inodes_per_block_group );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->last_mount_time,
   superblock->last_mount_time );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->last_written_time,
   superblock->last_written_time );

#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: number of inodes\t\t\t\t\t: %" PRIu32 "\n",
     function,
     superblock->number_of_inodes );

    libcnotify_printf(
     "%s: number of blocks\t\t\t\t\t: %" PRIu32 "\n",
     function,
     superblock->number_of_blocks );

    libcnotify_printf(
     "%s: number of reserved blocks\t\t\t: %" PRIu32 "\n",
     function,
     superblock->number_of_reserved_blocks );

    libcnotify_printf(
     "%s: number of unallocated blocks\t\t\t: %" PRIu32 "\n",
     function,
     superblock->number_of_unallocated_blocks );

    libcnotify_printf(
     "%s: number of unallocated inodes\t\t\t: %" PRIu32 "\n",
     function,
     superblock->number_of_unallocated_inodes );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->first_data_block_number,
     value_32bit );
    libcnotify_printf(
     "%s: first data block number\t\t\t\t: %" PRIu32 "\n",
     function,
     value_32bit );

    libcnotify_printf(
     "%s: block size\t\t\t\t\t: %" PRIu64 " (%" PRIu32 ")\n",
     function,
     (uint64_t) 1024UL << superblock->block_size,
     superblock->block_size );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->fragment_size,
     value_32bit );
    libcnotify_printf(
     "%s: fragment size\t\t\t\t\t: %" PRIu32 " (%" PRIu32 ")\n",
     function,
     1024 << value_32bit,
     value_32bit );

    libcnotify_printf(
     "%s: number of blocks per block group\t\t\t: %" PRIu32 "\n",
     function,
     superblock->number_of_blocks_per_block_group );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->number_of_fragments_per_block_group,
     value_32bit );
    libcnotify_printf(
     "%s: number of fragments per block group\t\t: %" PRIu32 "\n",
     function,
     value_32bit );

    libcnotify_printf(
     "%s: number of inodes per block group\t\t\t: %" PRIu32 "\n",
     function,
     superblock->number_of_inodes_per_block_group );

    if( libfsext_debug_print_posix_time_value(
         function,
         "last mount time\t\t\t\t\t",
         ( (fsext_superblock_ext2_t *) data )->last_mount_time,
         4,
         LIBFDATETIME_ENDIAN_LITTLE,
         LIBFDATETIME_POSIX_TIME_VALUE_TYPE_SECONDS_32BIT_SIGNED,
         LIBFDATETIME_STRING_FORMAT_TYPE_CTIME | LIBFDATETIME_STRING_FORMAT_FLAG_DATE_TIME,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_PRINT_FAILED,
       "%s: unable to print posix time value.",
       function );

      return( -1 );
    }
    if( libfsext_debug_print_posix_time_value(
         function,
         "last written time\t\t\t\t",
         ( (fsext_superblock_ext2_t *) data )->last_written_time,
         4,
         LIBFDATETIME_ENDIAN_LITTLE,
         LIBFDATETIME_POSIX_TIME_VALUE_TYPE_SECONDS_32BIT_SIGNED,
         LIBFDATETIME_STRING_FORMAT_TYPE_CTIME | LIBFDATETIME_STRING_FORMAT_FLAG_DATE_TIME,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_PRINT_FAILED,
       "%s: unable to print posix time value.",
       function );

      return( -1 );
    }
    byte_stream_copy_to_uint16_little_endian(
     ( (fsext_superblock_ext2_t *) data )->mount_count,
     value_16bit );
    libcnotify_printf(
     "%s: mount count\t\t\t\t\t: %" PRIu16 "\n",
     function,
     value_16bit );

    byte_stream_copy_to_uint16_little_endian(
     ( (fsext_superblock_ext2_t *) data )->maximum_mount_count,
     value_16bit );
    libcnotify_printf(
     "%s: maximum mount count\t\t\t\t: %" PRIu16 "\n",
     function,
     value_16bit );

    libcnotify_printf(
     "%s: signature\t\t\t\t\t: 0x%02" PRIx8 " 0x%02" PRIx8 "\n",
     function,
     ( (fsext_superblock_ext2_t *) data )->signature[ 0 ],
     ( (fsext_superblock_ext2_t *) data )->signature[ 1 ] );

    byte_stream_copy_to_uint16_little_endian(
     ( (fsext_superblock_ext2_t *) data )->file_system_state_flags,
     value_16bit );
    libcnotify_printf(
     "%s: file system state flags\t\t\t\t: 0x%04" PRIx16 "\n",
     function,
     value_16bit );
    libfsext_debug_print_file_system_state_flags(
     value_16bit );
    libcnotify_printf(
     "\n" );

    byte_stream_copy_to_uint16_little_endian(
     ( (fsext_superblock_ext2_t *) data )->error_handling_status,
     value_16bit );
    libcnotify_printf(
     "%s: error handling status\t\t\t\t: %" PRIu16 " (%s)\n",
     function,
     value_16bit,
     libfsext_debug_print_error_handling_status(
      value_16bit ) );

    byte_stream_copy_to_uint16_little_endian(
     ( (fsext_superblock_ext2_t *) data )->minor_format_revision,
     value_16bit );
    libcnotify_printf(
     "%s: minor format revision\t\t\t\t: %" PRIu16 "\n",
     function,
     value_16bit );

    if( libfsext_debug_print_posix_time_value(
         function,
         "last consistency check time\t\t\t",
         ( (fsext_superblock_ext2_t *) data )->last_consistency_check_time,
         4,
         LIBFDATETIME_ENDIAN_LITTLE,
         LIBFDATETIME_POSIX_TIME_VALUE_TYPE_SECONDS_32BIT_SIGNED,
         LIBFDATETIME_STRING_FORMAT_TYPE_CTIME | LIBFDATETIME_STRING_FORMAT_FLAG_DATE_TIME,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_PRINT_FAILED,
       "%s: unable to print posix time value.",
       function );

      return( -1 );
    }

/* TODO print interval as duration? */
    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->consistency_check_interval,
     value_32bit );
    libcnotify_printf(
     "%s: consistency check interval\t\t\t: %" PRIu32 "\n",
     function,
     value_32bit );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->creator_operating_system,
     value_32bit );
    libcnotify_printf(
     "%s: creator operating system\t\t\t\t: %" PRIu32 " (%s)\n",
     function,
     value_32bit,
     libfsext_debug_print_creator_operating_system(
      value_32bit ) );

    libcnotify_printf(
     "%s: format revision\t\t\t\t\t: %" PRIu32 "\n",
     function,
     superblock->format_revision );

    byte_stream_copy_to_uint16_little_endian(
     ( (fsext_superblock_ext2_t *) data )->reserved_block_user_identifier,
     value_16bit );
    libcnotify_printf(
     "%s: reserved block user identifier\t\t\t: %" PRIu16 "\n",
     function,
     value_16bit );

    byte_stream_copy_to_uint16_little_endian(
     ( (fsext_superblock_ext2_t *) data )->reserved_block_group_identifier,
     value_16bit );
    libcnotify_printf(
     "%s: reserved block group identifier\t\t\t: %" PRIu16 "\n",
     function,
     value_16bit );

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

  if( superblock->block_size > ( 31 - 10 ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid block size value out of bounds.",
     function );

    return( -1 );
  }
  superblock->block_size = (uint32_t) ( 1024UL << superblock->block_size );

  if( superblock->format_revision > 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
     "%s: unsupported format revision: %" PRIu32 ".",
     function,
     superblock->format_revision );

    return( -1 );
  }
/* TODO add sanity check of fragment size */

  if( superblock->format_revision == 1 )
  {
    byte_stream_copy_to_uint16_little_endian(
     ( (fsext_superblock_ext2_t *) data )->inode_size,
     superblock->inode_size );

    byte_stream_copy_to_uint16_little_endian(
     ( (fsext_superblock_ext2_t *) data )->block_group,
     superblock->block_group );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->compatible_features_flags,
     superblock->compatible_features_flags );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->incompatible_features_flags,
     superblock->incompatible_features_flags );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->read_only_compatible_features_flags,
     superblock->read_only_compatible_features_flags );

    if( memory_copy(
         superblock->file_system_identifier,
         ( (fsext_superblock_ext2_t *) data )->file_system_identifier,
         16 ) == NULL )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_MEMORY,
       LIBCERROR_MEMORY_ERROR_COPY_FAILED,
       "%s: unable to copy file system identifier.",
       function );

      return( -1 );
    }
    if( memory_copy(
         superblock->volume_label,
         ( (fsext_superblock_ext2_t *) data )->volume_label,
         16 ) == NULL )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_MEMORY,
       LIBCERROR_MEMORY_ERROR_COPY_FAILED,
       "%s: unable to copy volume label.",
       function );

      return( -1 );
    }
    if( memory_copy(
         superblock->last_mount_path,
         ( (fsext_superblock_ext2_t *) data )->last_mount_path,
         64 ) == NULL )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_MEMORY,
       LIBCERROR_MEMORY_ERROR_COPY_FAILED,
       "%s: unable to copy last mount path.",
       function );

      return( -1 );
    }
#if defined( HAVE_DEBUG_OUTPUT )
    if( libcnotify_verbose != 0 )
    {
      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext2_t *) data )->first_non_reserved_inode,
       value_32bit );
      libcnotify_printf(
       "%s: first non-reserved inode\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      libcnotify_printf(
       "%s: inode size\t\t\t\t\t: %" PRIu16 "\n",
       function,
       superblock->inode_size );

      libcnotify_printf(
       "%s: block group\t\t\t\t\t: %" PRIu16 "\n",
       function,
       superblock->block_group );

      libcnotify_printf(
       "%s: compatible features flags\t\t\t: 0x%08" PRIx32 "\n",
       function,
       superblock->compatible_features_flags );
      libfsext_debug_print_compatible_features_flags(
       superblock->compatible_features_flags );
      libcnotify_printf(
       "\n" );

      libcnotify_printf(
       "%s: incompatible features flags\t\t\t: 0x%08" PRIx32 "\n",
       function,
       superblock->incompatible_features_flags );
      libfsext_debug_print_incompatible_features_flags(
       superblock->incompatible_features_flags );
      libcnotify_printf(
       "\n" );

      libcnotify_printf(
       "%s: read-only compatible features flags\t\t: 0x%08" PRIx32 "\n",
       function,
       superblock->read_only_compatible_features_flags );
      libfsext_debug_print_read_only_compatible_features_flags(
       superblock->read_only_compatible_features_flags );
      libcnotify_printf(
       "\n" );

      if( libfsext_debug_print_guid_value(
           function,
           "file system identifier\t\t\t\t",
           ( (fsext_superblock_ext2_t *) data )->file_system_identifier,
           16,
           LIBFGUID_ENDIAN_BIG,
           LIBFGUID_STRING_FORMAT_FLAG_USE_LOWER_CASE,
           error ) != 1 )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_RUNTIME,
         LIBCERROR_RUNTIME_ERROR_PRINT_FAILED,
         "%s: unable to print GUID value.",
         function );

        return( -1 );
      }
      if( libfsext_debug_print_utf8_string_value(
           function,
           "volume label\t\t\t\t\t",
           superblock->volume_label,
           16,
           error ) != 1 )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_RUNTIME,
         LIBCERROR_RUNTIME_ERROR_PRINT_FAILED,
         "%s: unable to print UTF-8 string value.",
         function );

        return( -1 );
      }
      if( libfsext_debug_print_utf8_string_value(
           function,
           "last mount path\t\t\t\t\t",
           superblock->last_mount_path,
           64,
           error ) != 1 )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_RUNTIME,
         LIBCERROR_RUNTIME_ERROR_PRINT_FAILED,
         "%s: unable to print UTF-8 string value.",
         function );

        return( -1 );
      }
      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext2_t *) data )->algorithm_usage_bitmap,
       value_32bit );
      libcnotify_printf(
       "%s: algorithm usage bitmap\t\t\t\t: 0x%08" PRIx32 "\n",
       function,
       value_32bit );

      libcnotify_printf(
       "\n" );
    }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */
  }
  supported_feature_flags = 0x00000001UL
                          | 0x00000004UL
                          | 0x00000008UL
                          | 0x00000010UL
                          | 0x00000020UL
                          | 0x00001000UL;

  if( ( superblock->compatible_features_flags & ~( supported_feature_flags ) ) != 0 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
     "%s: unsupported compatible features flags: 0x%08" PRIx32 ".",
     function,
     superblock->compatible_features_flags );

    return( -1 );
  }
  supported_feature_flags = 0x00000002UL
                          | 0x00000004UL
                          | 0x00000008UL
                          | 0x00000010UL
                          | 0x00000040UL
                          | 0x00000080UL
                          | 0x00000200UL
                          | 0x00000400UL
                          | 0x00008000UL
                          | 0x00002000UL
                          | 0x00010000UL
                          | 0x00020000UL;

  if( ( superblock->incompatible_features_flags & ~( supported_feature_flags ) ) != 0 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
     "%s: unsupported incompatible features flags: 0x%08" PRIx32 ".",
     function,
     superblock->incompatible_features_flags );

    return( -1 );
  }
  if( ( ( superblock->compatible_features_flags & 0x00000200UL ) != 0 )
   || ( ( superblock->incompatible_features_flags & 0x0001f7c0UL ) != 0 )
   || ( ( superblock->read_only_compatible_features_flags & 0x00000378UL ) != 0 ) )
  {
    superblock->format_version = 4;
  }
  else if( ( ( superblock->compatible_features_flags & 0x00000004UL ) != 0 )
        || ( ( superblock->incompatible_features_flags & 0x0000000cUL ) != 0 ) )
  {
    superblock->format_version = 3;
  }
  else
  {
    superblock->format_version = 2;
  }
  if( ( superblock->compatible_features_flags & 0x00000001UL ) != 0 )
  {
#if defined( HAVE_DEBUG_OUTPUT )
    if( libcnotify_verbose != 0 )
    {
      libcnotify_printf(
       "%s: number of pre-allocated blocks per file\t\t: %" PRIu8 "\n",
       function,
       ( (fsext_superblock_ext2_t *) data )->number_of_pre_allocated_blocks_per_file );

      libcnotify_printf(
       "%s: number of pre-allocated blocks per directory\t\t: %" PRIu8 "\n",
       function,
       ( (fsext_superblock_ext2_t *) data )->number_of_pre_allocated_blocks_per_directory );

      libcnotify_printf(
       "%s: padding1:\n",
       function );
      libcnotify_print_data(
       ( (fsext_superblock_ext2_t *) data )->padding1,
       2,
       0 );
    }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */
  }
  if( superblock->format_version == 4 )
  {
    byte_stream_copy_to_uint16_little_endian(
     ( (fsext_superblock_ext4_t *) data )->group_descriptor_size,
     superblock->group_descriptor_size );
  }
  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_superblock_ext2_t *) data )->first_metadata_block_group,
   superblock->first_metadata_block_group );

  if( superblock->format_version == 4 )
  {
    number_of_block_groups_per_flex_group = ( (fsext_superblock_ext4_t *) data )->number_of_block_groups_per_flex_group;

    checksum_type = ( (fsext_superblock_ext4_t *) data )->checksum_type;

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext4_t *) data )->file_system_creation_time,
     superblock->file_system_creation_time );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext4_t *) data )->metadata_checksum_seed,
     superblock->metadata_checksum_seed );
  }
#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    if( libfsext_debug_print_guid_value(
         function,
         "journal identifier\t\t\t\t",
         ( (fsext_superblock_ext2_t *) data )->journal_identifier,
         16,
         LIBFGUID_ENDIAN_BIG,
         LIBFGUID_STRING_FORMAT_FLAG_USE_LOWER_CASE,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_PRINT_FAILED,
       "%s: unable to print GUID value.",
       function );

      return( -1 );
    }
    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->journal_inode_number,
     value_32bit );
    libcnotify_printf(
     "%s: journal inode number\t\t\t\t: %" PRIu32 "\n",
     function,
     value_32bit );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->journal_device,
     value_32bit );
    libcnotify_printf(
     "%s: journal device\t\t\t\t\t: %" PRIu32 "\n",
     function,
     value_32bit );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->orphan_inode_list_head,
     value_32bit );
    libcnotify_printf(
     "%s: orphan inode list head\t\t\t\t: %" PRIu32 "\n",
     function,
     value_32bit );

    libcnotify_printf(
     "%s: HTREE hash seed:\n",
     function );
    libcnotify_print_data(
     ( (fsext_superblock_ext2_t *) data )->htree_hash_seed,
     16,
     0 );

    libcnotify_printf(
     "%s: default hash version\t\t\t\t: %" PRIu8 "\n",
     function,
     ( (fsext_superblock_ext2_t *) data )->default_hash_version );

    if( superblock->format_version < 4 )
    {
      libcnotify_printf(
       "%s: padding2:\n",
       function );
      libcnotify_print_data(
       ( (fsext_superblock_ext2_t *) data )->padding2,
       3,
       0 );
    }
    else
    {
      libcnotify_printf(
       "%s: journal backup type\t\t\t\t: %" PRIu8 "\n",
       function,
       ( (fsext_superblock_ext4_t *) data )->journal_backup_type );

      libcnotify_printf(
       "%s: group descriptor size\t\t\t\t: %" PRIu16 "\n",
       function,
       superblock->group_descriptor_size );
    }
    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_superblock_ext2_t *) data )->default_mount_options,
     value_32bit );
    libcnotify_printf(
     "%s: default mount options\t\t\t\t: %" PRIu32 "\n",
     function,
     value_32bit );

    libcnotify_printf(
     "%s: first metadata block group\t\t\t: %" PRIu32 "\n",
     function,
     superblock->first_metadata_block_group );

    if( superblock->format_version == 4 )
    {
      if( libfsext_debug_print_posix_time_value(
           function,
           "file system creation time\t\t\t",
           ( (fsext_superblock_ext4_t *) data )->file_system_creation_time,
           4,
           LIBFDATETIME_ENDIAN_LITTLE,
           LIBFDATETIME_POSIX_TIME_VALUE_TYPE_SECONDS_32BIT_SIGNED,
           LIBFDATETIME_STRING_FORMAT_TYPE_CTIME | LIBFDATETIME_STRING_FORMAT_FLAG_DATE_TIME,
           error ) != 1 )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_RUNTIME,
         LIBCERROR_RUNTIME_ERROR_PRINT_FAILED,
         "%s: unable to print posix time value.",
         function );

        return( -1 );
      }
      libcnotify_printf(
       "%s: backup journal inodes:\n",
       function );
      libcnotify_print_data(
       ( (fsext_superblock_ext4_t *) data )->backup_journal_inodes,
       68,
       0 );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->number_of_blocks_upper,
       value_32bit );
      libcnotify_printf(
       "%s: number of blocks (upper 32-bit)\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->number_of_reserved_blocks_upper,
       value_32bit );
      libcnotify_printf(
       "%s: number of reserved blocks (upper 32-bit)\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->number_of_unallocated_blocks_upper,
       value_32bit );
      libcnotify_printf(
       "%s: number of unallocated blocks (upper 32-bit)\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint16_little_endian(
       ( (fsext_superblock_ext4_t *) data )->minimum_inode_size,
       value_16bit );
      libcnotify_printf(
       "%s: minimum inode size\t\t\t\t: %" PRIu16 "\n",
       function,
       value_16bit );

      byte_stream_copy_to_uint16_little_endian(
       ( (fsext_superblock_ext4_t *) data )->reserved_inode_size,
       value_16bit );
      libcnotify_printf(
       "%s: reserved inode size\t\t\t\t: %" PRIu16 "\n",
       function,
       value_16bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->flags,
       value_32bit );
      libcnotify_printf(
       "%s: flags\t\t\t\t\t\t: 0x%08" PRIx32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint16_little_endian(
       ( (fsext_superblock_ext4_t *) data )->read_stride,
       value_16bit );
      libcnotify_printf(
       "%s: read stride\t\t\t\t\t: %" PRIu16 "\n",
       function,
       value_16bit );

      byte_stream_copy_to_uint16_little_endian(
       ( (fsext_superblock_ext4_t *) data )->multi_mount_protection_update_interval,
       value_16bit );
      libcnotify_printf(
       "%s: multi-mount protection update interval\t\t: %" PRIu16 "\n",
       function,
       value_16bit );

      byte_stream_copy_to_uint64_little_endian(
       ( (fsext_superblock_ext4_t *) data )->multi_mount_protection_block,
       value_64bit );
      libcnotify_printf(
       "%s: multi-mount protection block\t\t\t: %" PRIu64 "\n",
       function,
       value_64bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->raid_stripe_width,
       value_32bit );
      libcnotify_printf(
       "%s: RAID stripe width\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      libcnotify_printf(
       "%s: number of blocks per flex group\t\t\t: %" PRIu32 " (2 ^ %" PRIu8 ")\n",
       function,
       (uint64_t) 1 << number_of_block_groups_per_flex_group,
       number_of_block_groups_per_flex_group );

      libcnotify_printf(
       "%s: checksum type\t\t\t\t\t: %" PRIu8 "\n",
       function,
       ( (fsext_superblock_ext4_t *) data )->checksum_type );

      libcnotify_printf(
       "%s: encryption level\t\t\t\t\t: %" PRIu8 "\n",
       function,
       ( (fsext_superblock_ext4_t *) data )->encryption_level );

      libcnotify_printf(
       "%s: padding2\t\t\t\t\t\t: 0x%02" PRIx8 "\n",
       function,
       ( (fsext_superblock_ext4_t *) data )->padding2 );

      byte_stream_copy_to_uint64_little_endian(
       ( (fsext_superblock_ext4_t *) data )->write_count,
       value_64bit );
      libcnotify_printf(
       "%s: write count\t\t\t\t\t: %" PRIu64 "\n",
       function,
       value_64bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->snapshot_inode_number,
       value_32bit );
      libcnotify_printf(
       "%s: snapshot inode number\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->snapshot_sequential_identifier,
       value_32bit );
      libcnotify_printf(
       "%s: snapshot sequential identifier\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint64_little_endian(
       ( (fsext_superblock_ext4_t *) data )->snapshot_number_of_reserved_blocks,
       value_64bit );
      libcnotify_printf(
       "%s: snapshot number of reserved blocks\t\t: %" PRIu64 "\n",
       function,
       value_64bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->snapshot_inode_list,
       value_32bit );
      libcnotify_printf(
       "%s: snapshot inode list\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->number_of_errors,
       value_32bit );
      libcnotify_printf(
       "%s: number of errors\t\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->first_error_time,
       value_32bit );
      libcnotify_printf(
       "%s: first error time\t\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->first_error_inode_number,
       value_32bit );
      libcnotify_printf(
       "%s: first error inode number\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->first_error_block_number,
       value_32bit );
      libcnotify_printf(
       "%s: first error block number\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      libcnotify_printf(
       "%s: first error function:\n",
       function );
      libcnotify_print_data(
       ( (fsext_superblock_ext4_t *) data )->first_error_function,
       32,
       0 );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->first_error_function_line_number,
       value_32bit );
      libcnotify_printf(
       "%s: first error function line number\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->last_error_time,
       value_32bit );
      libcnotify_printf(
       "%s: last error time\t\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->last_error_inode_number,
       value_32bit );
      libcnotify_printf(
       "%s: last error inode number\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->last_error_function_line_number,
       value_32bit );
      libcnotify_printf(
       "%s: last error function line number\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->last_error_block_number,
       value_32bit );
      libcnotify_printf(
       "%s: last error block number\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      libcnotify_printf(
       "%s: last error function:\n",
       function );
      libcnotify_print_data(
       ( (fsext_superblock_ext4_t *) data )->last_error_function,
       32,
       0 );

      libcnotify_printf(
       "%s: mount options:\n",
       function );
      libcnotify_print_data(
       ( (fsext_superblock_ext4_t *) data )->last_error_function,
       64,
       0 );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->user_quota_inode_number,
       value_32bit );
      libcnotify_printf(
       "%s: user quota inode number\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->group_quota_inode_number,
       value_32bit );
      libcnotify_printf(
       "%s: group quota inode number\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->overhead_number_of_clusters,
       value_32bit );
      libcnotify_printf(
       "%s: overhead number of clusters\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->backup_block_group1,
       value_32bit );
      libcnotify_printf(
       "%s: first backup block group\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->backup_block_group2,
       value_32bit );
      libcnotify_printf(
       "%s: second backup block group\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->encryption_algorithms,
       value_32bit );
      libcnotify_printf(
       "%s: encryption algorithms\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      libcnotify_printf(
       "%s: encryption password salt:\n",
       function );
      libcnotify_print_data(
       ( (fsext_superblock_ext4_t *) data )->encryption_password_salt,
       16,
       0 );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->lost_and_found_inode_number,
       value_32bit );
      libcnotify_printf(
       "%s: lost and found inode inode number\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->project_quota_inode_number,
       value_32bit );
      libcnotify_printf(
       "%s: project quota inode number\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );

      libcnotify_printf(
       "%s: metadata checksum seed\t\t\t\t: 0x%08" PRIx32 "\n",
       function,
       superblock->metadata_checksum_seed );

      libcnotify_printf(
       "%s: unknown1:\n",
       function );
      libcnotify_print_data(
       ( (fsext_superblock_ext4_t *) data )->unknown1,
       8,
       LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );

      byte_stream_copy_to_uint16_little_endian(
       ( (fsext_superblock_ext4_t *) data )->encoding,
       value_16bit );
      libcnotify_printf(
       "%s: encoding\t\t\t\t\t\t: %" PRIu16 "\n",
       function,
       value_16bit );

      byte_stream_copy_to_uint16_little_endian(
       ( (fsext_superblock_ext4_t *) data )->encoding_flags,
       value_16bit );
      libcnotify_printf(
       "%s: encoding flags\t\t\t\t\t: 0x%04" PRIx16 "\n",
       function,
       value_16bit );

      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->orphan_file_inode_number,
       value_32bit );
      libcnotify_printf(
       "%s: orphan file inode number\t\t\t\t: %" PRIu32 "\n",
       function,
       value_32bit );
    }
    libcnotify_printf(
     "%s: padding3:\n",
     function );

    if( superblock->format_version < 4 )
    {
      libcnotify_print_data(
       ( (fsext_superblock_ext2_t *) data )->padding3,
       190,
       0 );
    }
    else
    {
      libcnotify_print_data(
       ( (fsext_superblock_ext4_t *) data )->padding3,
       376,
       LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );
    }
    if( superblock->format_version == 4 )
    {
      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_superblock_ext4_t *) data )->checksum,
       stored_checksum );
      libcnotify_printf(
       "%s: checksum\t\t\t\t\t\t: 0x%08" PRIx32 "\n",
       function,
       stored_checksum );

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

  if( ( superblock->read_only_compatible_features_flags & LIBFSEXT_READ_ONLY_COMPATIBLE_FEATURES_FLAG_METADATA_CHECKSUM ) != 0 )
  {
    if( checksum_type != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
       "%s: unsupported checksum type: %" PRIu8 ".",
       function,
       checksum_type );

      return( -1 );
    }
    if( libfsext_checksum_calculate_crc32(
         &calculated_checksum,
         data,
         data_size - 4,
         0,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_SET_FAILED,
       "%s: unable to calculate CRC-32.",
       function );

      return( -1 );
    }
    calculated_checksum = 0xffffffffUL - calculated_checksum;

    if( ( stored_checksum != 0 )
     && ( stored_checksum != calculated_checksum ) )
    {
#if defined( HAVE_DEBUG_OUTPUT )
      if( libcnotify_verbose != 0 )
      {
        libcnotify_printf(
         "%s: mismatch in checksum ( 0x%08" PRIx32 " != 0x%08" PRIx32 " ).\n",
         function,
         stored_checksum,
         calculated_checksum );
      }
#endif
      superblock->is_corrupt = 1;
    }
  }
  if( superblock->number_of_blocks == 0 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid number of blocks value out of bounds.",
     function );

    return( -1 );
  }
  if( superblock->number_of_blocks_per_block_group == 0 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid number of blocks per block group value out of bounds.",
     function );

    return( -1 );
  }
  superblock->number_of_block_groups = superblock->number_of_blocks / superblock->number_of_blocks_per_block_group;

  if( ( superblock->number_of_blocks % superblock->number_of_blocks_per_block_group ) != 0 )
  {
    superblock->number_of_block_groups += 1;
  }
  if( superblock->number_of_blocks_per_block_group > ( (uint64_t) UINT64_MAX / superblock->block_size ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid number of blocks per flex group value out of bounds.",
     function );

    return( -1 );
  }
  superblock->block_group_size = superblock->number_of_blocks_per_block_group * superblock->block_size;

  if( number_of_block_groups_per_flex_group > 0 )
  {
    if( number_of_block_groups_per_flex_group >= 16 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
       "%s: invalid number of block groups per flex group value out of bounds.",
       function );

      return( -1 );
    }
    superblock->number_of_blocks_per_flex_group = (uint32_t) 1 << number_of_block_groups_per_flex_group;

    if( superblock->number_of_blocks_per_flex_group > ( (uint32_t) UINT32_MAX / superblock->number_of_blocks_per_block_group ) )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
       "%s: invalid number of block groups per flex group value out of bounds.",
       function );

      return( -1 );
    }
    superblock->number_of_blocks_per_flex_group *= superblock->number_of_blocks_per_block_group;

    if( superblock->number_of_blocks_per_flex_group > ( (uint64_t) UINT64_MAX / superblock->block_size ) )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
       "%s: invalid number of blocks per flex group value out of bounds.",
       function );

      return( -1 );
    }
    superblock->flex_group_size = superblock->number_of_blocks_per_flex_group * superblock->block_size;
  }
#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: format version\t\t\t\t\t: %" PRIu32 "\n",
     function,
     superblock->format_version );

    libcnotify_printf(
     "%s: number of blocks per block group\t\t\t: %" PRIu64 "\n",
     function,
     superblock->number_of_blocks_per_block_group );

    libcnotify_printf(
     "%s: block group size\t\t\t\t\t: %" PRIu64 "\n",
     function,
     superblock->block_group_size );

    libcnotify_printf(
     "%s: number of blocks per flex group\t\t\t: %" PRIu64 "\n",
     function,
     superblock->number_of_blocks_per_flex_group );

    libcnotify_printf(
     "%s: flex group size\t\t\t\t\t: %" PRIu64 "\n",
     function,
     superblock->flex_group_size );

    libcnotify_printf(
     "%s: number of block groups\t\t\t\t: %" PRIu32 "\n",
     function,
     superblock->number_of_block_groups );

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

  return( 1 );
}

/* Reads the superblock from a Basic File IO (bfio) handle
 * Returns 1 if successful, 0 if signature does not match or -1 on error
 */
int libfsext_superblock_read_file_io_handle(
     libfsext_superblock_t *superblock,
     libbfio_handle_t *file_io_handle,
     off64_t file_offset,
     libcerror_error_t **error )
{
  uint8_t data[ 1024 ];

  static char *function = "libfsext_superblock_read_file_io_handle";
  ssize_t read_count    = 0;
  int result            = 0;

#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: reading superblock at offset: %" PRIi64 " (0x%08" PRIx64 ")\n",
     function,
     file_offset,
     file_offset );
  }
#endif
  read_count = libbfio_handle_read_buffer_at_offset(
                file_io_handle,
                data,
                1024,
                file_offset,
                error );

  if( read_count != (ssize_t) 1024 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_IO,
     LIBCERROR_IO_ERROR_READ_FAILED,
     "%s: unable to read superblock at offset: %" PRIi64 " (0x%08" PRIx64 ").",
     function,
     file_offset,
     file_offset );

    return( -1 );
  }
  result = libfsext_superblock_read_data(
            superblock,
            data,
            1024,
            error );

  if( result == -1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_IO,
     LIBCERROR_IO_ERROR_READ_FAILED,
     "%s: unable to read superblock at offset: %" PRIi64 " (0x%08" PRIx64 ").",
     function,
     file_offset,
     file_offset );

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

/* Retrieves the file system identifier
 * The identifier is an UUID stored in big-endian and is 16 bytes of size
 * Returns 1 if successful or -1 on error
 */
int libfsext_superblock_get_file_system_identifier(
     libfsext_superblock_t *superblock,
     uint8_t *uuid_data,
     size_t uuid_data_size,
     libcerror_error_t **error )
{
  static char *function = "libfsext_superblock_get_file_system_identifier";

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

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

    return( -1 );
  }
  if( ( uuid_data_size < 16 )
   || ( uuid_data_size > (size_t) SSIZE_MAX ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid UUID data size value out of bounds.",
     function );

    return( -1 );
  }
  if( memory_copy(
       uuid_data,
       superblock->file_system_identifier,
       16 ) == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_COPY_FAILED,
     "%s: unable to copy file system identifier.",
     function );

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

/* Retrieves the size of the UTF-8 encoded volume label
 * The returned size includes the end of string character
 * Returns 1 if successful, 0 if not available or -1 on error
 */
int libfsext_superblock_get_utf8_volume_label_size(
     libfsext_superblock_t *superblock,
     size_t *utf8_string_size,
     libcerror_error_t **error )
{
  static char *function = "libfsext_superblock_get_utf8_volume_label_size";

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

    return( -1 );
  }
  if( libuna_utf8_string_size_from_utf8_stream(
       superblock->volume_label,
       16,
       utf8_string_size,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_GET_FAILED,
     "%s: unable to retrieve UTF-8 string size.",
     function );

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

/* Retrieves the UTF-8 encoded volume label
 * The size should include the end of string character
 * Returns 1 if successful, 0 if not available or -1 on error
 */
int libfsext_superblock_get_utf8_volume_label(
     libfsext_superblock_t *superblock,
     uint8_t *utf8_string,
     size_t utf8_string_size,
     libcerror_error_t **error )
{
  static char *function = "libfsext_superblock_get_utf8_volume_label";

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

    return( -1 );
  }
  if( libuna_utf8_string_copy_from_utf8_stream(
       utf8_string,
       utf8_string_size,
       superblock->volume_label,
       16,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_GET_FAILED,
     "%s: unable to retrieve UTF-8 string.",
     function );

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

/* Retrieves the size of the UTF-16 encoded volume label
 * The returned size includes the end of string character
 * Returns 1 if successful, 0 if not available or -1 on error
 */
int libfsext_superblock_get_utf16_volume_label_size(
     libfsext_superblock_t *superblock,
     size_t *utf16_string_size,
     libcerror_error_t **error )
{
  static char *function = "libfsext_superblock_get_utf16_volume_label_size";

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

    return( -1 );
  }
  if( libuna_utf16_string_size_from_utf8_stream(
       superblock->volume_label,
       16,
       utf16_string_size,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_GET_FAILED,
     "%s: unable to retrieve UTF-16 string size.",
     function );

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

/* Retrieves the UTF-16 encoded volume label
 * The size should include the end of string character
 * Returns 1 if successful, 0 if not available or -1 on error
 */
int libfsext_superblock_get_utf16_volume_label(
     libfsext_superblock_t *superblock,
     uint16_t *utf16_string,
     size_t utf16_string_size,
     libcerror_error_t **error )
{
  static char *function = "libfsext_superblock_get_utf16_volume_label";

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

    return( -1 );
  }
  if( libuna_utf16_string_copy_from_utf8_stream(
       utf16_string,
       utf16_string_size,
       superblock->volume_label,
       16,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_GET_FAILED,
     "%s: unable to retrieve UTF-16 string.",
     function );

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

/* Retrieves the size of the UTF-8 encoded last mount path
 * The returned size includes the end of string character
 * Returns 1 if successful, 0 if not available or -1 on error
 */
int libfsext_superblock_get_utf8_last_mount_path_size(
     libfsext_superblock_t *superblock,
     size_t *utf8_string_size,
     libcerror_error_t **error )
{
  static char *function = "libfsext_superblock_get_utf8_last_mount_path_size";

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

    return( -1 );
  }
  if( libuna_utf8_string_size_from_utf8_stream(
       superblock->last_mount_path,
       64,
       utf8_string_size,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_GET_FAILED,
     "%s: unable to retrieve UTF-8 string size.",
     function );

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

/* Retrieves the UTF-8 encoded last mount path
 * The size should include the end of string character
 * Returns 1 if successful, 0 if not available or -1 on error
 */
int libfsext_superblock_get_utf8_last_mount_path(
     libfsext_superblock_t *superblock,
     uint8_t *utf8_string,
     size_t utf8_string_size,
     libcerror_error_t **error )
{
  static char *function = "libfsext_superblock_get_utf8_last_mount_path";

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

    return( -1 );
  }
  if( libuna_utf8_string_copy_from_utf8_stream(
       utf8_string,
       utf8_string_size,
       superblock->last_mount_path,
       64,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_GET_FAILED,
     "%s: unable to retrieve UTF-8 string.",
     function );

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

/* Retrieves the size of the UTF-16 encoded last mount path
 * The returned size includes the end of string character
 * Returns 1 if successful, 0 if not available or -1 on error
 */
int libfsext_superblock_get_utf16_last_mount_path_size(
     libfsext_superblock_t *superblock,
     size_t *utf16_string_size,
     libcerror_error_t **error )
{
  static char *function = "libfsext_superblock_get_utf16_last_mount_path_size";

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

    return( -1 );
  }
  if( libuna_utf16_string_size_from_utf8_stream(
       superblock->last_mount_path,
       64,
       utf16_string_size,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_GET_FAILED,
     "%s: unable to retrieve UTF-16 string size.",
     function );

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

/* Retrieves the UTF-16 encoded last mount path
 * The size should include the end of string character
 * Returns 1 if successful, 0 if not available or -1 on error
 */
int libfsext_superblock_get_utf16_last_mount_path(
     libfsext_superblock_t *superblock,
     uint16_t *utf16_string,
     size_t utf16_string_size,
     libcerror_error_t **error )
{
  static char *function = "libfsext_superblock_get_utf16_last_mount_path";

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

    return( -1 );
  }
  if( libuna_utf16_string_copy_from_utf8_stream(
       utf16_string,
       utf16_string_size,
       superblock->last_mount_path,
       64,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_GET_FAILED,
     "%s: unable to retrieve UTF-16 string.",
     function );

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


Coverage Report

Created: 2026-04-10 07:49