1 files changed, 45 insertions, 0 deletions
diff --git a/MdePkg/Include/Guid/FileSystemInfo.h b/MdePkg/Include/Guid/FileSystemInfo.h
new file mode 100644
index 0000000000..a890c3871c
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+++ b/MdePkg/Include/Guid/FileSystemInfo.h
@@ -0,0 +1,45 @@
+/** @file
+  FileSystemInfo guid and data structure as defined in the EFI 1.0 specification.
+
+  Copyright (c) 2006, Intel Corporation                                                         
+  All rights reserved. This program and the accompanying materials                          
+  are licensed and made available under the terms and conditions of the BSD License         
+  which accompanies this distribution.  The full text of the license may be found at        
+  http://opensource.org/licenses/bsd-license.php                                            
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+
+  Module Name:  FileSystemInfo.h
+
+**/
+
+#ifndef __FILE_SYSTEM_INFO_H__
+#define __FILE_SYSTEM_INFO_H__
+
+#define EFI_FILE_SYSTEM_INFO_ID_GUID \
+  { \
+    0x9576e93, 0x6d3f, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \
+  }
+
+typedef struct {
+  UINT64  Size;
+  BOOLEAN ReadOnly;
+  UINT64  VolumeSize;
+  UINT64  FreeSpace;
+  UINT32  BlockSize;
+  CHAR16  VolumeLabel[1];
+} EFI_FILE_SYSTEM_INFO;
+
+//
+// The VolumeLabel field of the EFI_FILE_SYSTEM_INFO data structure is variable length.
+// Whenever code needs to know the size of the EFI_FILE_SYSTEM_INFO data structure, it needs
+// to be the size of the data structure without the VolumeLable field.  The following macro
+// computes this size correctly no matter how big the VolumeLable array is declared.
+// This is required to make the EFI_FILE_SYSTEM_INFO data structure ANSI compilant.
+//
+#define SIZE_OF_EFI_FILE_SYSTEM_INFO  EFI_FIELD_OFFSET (EFI_FILE_SYSTEM_INFO, VolumeLabel)
+
+extern EFI_GUID gEfiFileSystemInfoGuid;
+
+#endif