/*

 * OSS-Fuzz target for libvslvm logical volume type

 *

 * Copyright (C) 2014-2026, 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 <stddef.h>

#include <stdint.h>

/* Note that some of the OSS-Fuzz engines use C++

 */

extern "C" {

#include "ossfuzz_libbfio.h"

#include "ossfuzz_libvslvm.h"

#if !defined( LIBVSLVM_HAVE_BFIO )

/* Opens a handle using a Basic File IO (bfio) handle

 * Returns 1 if successful or -1 on error

 */

LIBVSLVM_EXTERN \

int libvslvm_handle_open_file_io_handle(

     libvslvm_handle_t *handle,

     libbfio_handle_t *file_io_handle,

     int access_flags,

     libvslvm_error_t **error );

/* Opens the physical volume files

 * This function assumes the physical volume files are in same order as defined by the metadata

 * Returns 1 if successful or -1 on error

 */

LIBVSLVM_EXTERN \

int libvslvm_handle_open_physical_volume_files_file_io_pool(

     libvslvm_handle_t *handle,

     libbfio_pool_t *file_io_pool,

     libvslvm_error_t **error );

#endif /* !defined( LIBVSLVM_HAVE_BFIO ) */

int LLVMFuzzerTestOneInput(

     const uint8_t *data,

     size_t size )

{

  uint8_t buffer[ 512 ];

  char string[ 64 ];

  libbfio_handle_t *file_io_handle          = NULL;

  libbfio_pool_t *file_io_pool              = NULL;

  libvslvm_handle_t *handle                 = NULL;

  libvslvm_logical_volume_t *logical_volume = NULL;

  libvslvm_volume_group_t *volume_group     = NULL;

  off64_t volume_offset                     = 0;

  size64_t volume_size                      = 0;

  size_t string_size                        = 0;

  int entry_index                           = 0;

  int number_of_logical_volumes             = 0;

  int number_of_segments                    = 0;

  int read_iterator                         = 0;

  if( libbfio_memory_range_initialize(

       &file_io_handle,

       NULL ) != 1 )

  {

    return( 0 );

  }

  if( libbfio_memory_range_set(

       file_io_handle,

       (uint8_t *) data,

       size,

       NULL ) != 1 )

  {

    goto on_error_libbfio;

  }

  if( libbfio_pool_initialize(

       &file_io_pool,

       0,

       0,

       NULL ) != 1 )

  {

    goto on_error_libbfio;

  }

  if( libvslvm_handle_initialize(

       &handle,

       NULL ) != 1 )

  {

    goto on_error_libbfio;

  }

  if( libvslvm_handle_open_file_io_handle(

       handle,

       file_io_handle,

       LIBVSLVM_OPEN_READ,

       NULL ) != 1 )

  {

    goto on_error_libvslvm_handle;

  }

  if( libbfio_pool_append_handle(

       file_io_pool,

       &entry_index,

       file_io_handle,

       LIBBFIO_OPEN_READ,

       NULL ) != 1 )

  {

    goto on_error_libvslvm_handle;

  }

  /* The file IO pool takes over management of the file IO handle

   */

  file_io_handle = NULL;

  if( libvslvm_handle_open_physical_volume_files_file_io_pool(

       handle,

       file_io_pool,

       NULL ) != 1 )

  {

    goto on_error_libvslvm_handle;

  }

  if( libvslvm_handle_get_volume_group(

       handle,

       &volume_group,

       NULL ) == 1 )

  {

    if( libvslvm_volume_group_get_number_of_logical_volumes(

         volume_group,

         &number_of_logical_volumes,

         NULL ) != 1 )

    {

      goto on_error_libvslvm_volume_group;

    }

    if( number_of_logical_volumes > 0 )

    {

      if( libvslvm_volume_group_get_logical_volume(

           volume_group,

           0,

           &logical_volume,

           NULL ) != 1 )

      {

        goto on_error_libvslvm_volume_group;

      }

      if( libvslvm_logical_volume_get_name_size(

           logical_volume,

           &string_size,

           NULL ) != 1 )

      {

        goto on_error_libvslvm_logical_volume;

      }

      if( libvslvm_logical_volume_get_name(

           logical_volume,

           string,

           64,

           NULL ) != 1 )

      {

        goto on_error_libvslvm_logical_volume;

      }

      if( libvslvm_logical_volume_get_identifier_size(

           logical_volume,

           &string_size,

           NULL ) != 1 )

      {

        goto on_error_libvslvm_logical_volume;

      }

      if( libvslvm_logical_volume_get_identifier(

           logical_volume,

           string,

           64,

           NULL ) != 1 )

      {

        goto on_error_libvslvm_logical_volume;

      }

      if( libvslvm_logical_volume_get_number_of_segments(

           logical_volume,

           &number_of_segments,

           NULL ) != 1 )

      {

        goto on_error_libvslvm_logical_volume;

      }

      if( libvslvm_logical_volume_get_size(

           logical_volume,

           &volume_size,

           NULL ) != 1 )

      {

        goto on_error_libvslvm_logical_volume;

      }

      for( read_iterator = 0;

           read_iterator < 128;

           read_iterator++ )

      {

        if( volume_offset >= volume_size )

        {

          break;

        }

        if( libvslvm_logical_volume_read_buffer_at_offset(

             logical_volume,

             buffer,

             497,

             volume_offset,

             NULL ) == -1 )

        {

          goto on_error_libvslvm_logical_volume;

        }

        volume_offset += 497;

      }

on_error_libvslvm_logical_volume:

      libvslvm_logical_volume_free(

       &logical_volume,

       NULL );

    }

on_error_libvslvm_volume_group:

    libvslvm_volume_group_free(

     &volume_group,

     NULL );

  }

  libvslvm_handle_close(

   handle,

   NULL );

on_error_libvslvm_handle:

  libvslvm_handle_free(

   &handle,

   NULL );

on_error_libbfio:

  /* Note that on error the handle still has a reference to file_io_pool

   * that will be closed. Therefore the file IO pool and handle need to

   * be freed after closing or freeing the handle.

   */

  if( file_io_pool != NULL )

  {

    libbfio_pool_free(

     &file_io_pool,

     NULL );

  }

  if( file_io_handle != NULL )

  {

    libbfio_handle_free(

     &file_io_handle,

     NULL );

  }

  return( 0 );

}

} /* extern "C" */