MdePkg/Include/Guid/FileSystemInfo.h

   1 /** @file
   2   FileSystemInfo guid and data structure as defined in the EFI 1.0 specification.
   3
   4   Copyright (c) 2006, Intel Corporation
   5   All rights reserved. This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #ifndef __FILE_SYSTEM_INFO_H__
  16 #define __FILE_SYSTEM_INFO_H__
  17
  18 #define EFI_FILE_SYSTEM_INFO_ID \
  19   { \
  20     0x9576e93, 0x6d3f, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \
  21   }
  22
  23 typedef struct {
  24   UINT64  Size;
  25   BOOLEAN ReadOnly;
  26   UINT64  VolumeSize;
  27   UINT64  FreeSpace;
  28   UINT32  BlockSize;
  29   CHAR16  VolumeLabel[1];
  30 } EFI_FILE_SYSTEM_INFO;
  31
  32 //
  33 // The VolumeLabel field of the EFI_FILE_SYSTEM_INFO data structure is variable length.
  34 // Whenever code needs to know the size of the EFI_FILE_SYSTEM_INFO data structure, it needs
  35 // to be the size of the data structure without the VolumeLable field.  The following macro
  36 // computes this size correctly no matter how big the VolumeLable array is declared.
  37 // This is required to make the EFI_FILE_SYSTEM_INFO data structure ANSI compilant.
  38 //
  39 #define SIZE_OF_EFI_FILE_SYSTEM_INFO  EFI_FIELD_OFFSET (EFI_FILE_SYSTEM_INFO, VolumeLabel)
  40
  41 extern EFI_GUID gEfiFileSystemInfoGuid;
  42
  43 #endif