1 /** @file 2 Provides a GUID and a data structure that can be used with EFI_FILE_PROTOCOL.GetInfo() 3 or EFI_FILE_PROTOCOL.SetInfo() to get or set information about the system's volume. 4 This GUID is defined in UEFI specification. 5 6 Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR> 7 This program and the accompanying materials are licensed and made available under 8 the terms and conditions of the BSD License that accompanies this distribution. 9 The full text of the license may be found at 10 http://opensource.org/licenses/bsd-license.php. 11 12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 15 **/ 16 17 #ifndef __FILE_SYSTEM_INFO_H__ 18 #define __FILE_SYSTEM_INFO_H__ 19 20 #define EFI_FILE_SYSTEM_INFO_ID \ 21 { \ 22 0x9576e93, 0x6d3f, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \ 23 } 24 25 typedef struct { 26 /// 27 /// The size of the EFI_FILE_SYSTEM_INFO structure, including the Null-terminated VolumeLabel string. 28 /// 29 UINT64 Size; 30 /// 31 /// TRUE if the volume only supports read access. 32 /// 33 BOOLEAN ReadOnly; 34 /// 35 /// The number of bytes managed by the file system. 36 /// 37 UINT64 VolumeSize; 38 /// 39 /// The number of available bytes for use by the file system. 40 /// 41 UINT64 FreeSpace; 42 /// 43 /// The nominal block size by which files are typically grown. 44 /// 45 UINT32 BlockSize; 46 /// 47 /// The Null-terminated string that is the volume's label. 48 /// 49 CHAR16 VolumeLabel[1]; 50 } EFI_FILE_SYSTEM_INFO; 51 52 /// 53 /// The VolumeLabel field of the EFI_FILE_SYSTEM_INFO data structure is variable length. 54 /// Whenever code needs to know the size of the EFI_FILE_SYSTEM_INFO data structure, it needs 55 /// to be the size of the data structure without the VolumeLable field. The following macro 56 /// computes this size correctly no matter how big the VolumeLable array is declared. 57 /// This is required to make the EFI_FILE_SYSTEM_INFO data structure ANSI compilant. 58 /// 59 #define SIZE_OF_EFI_FILE_SYSTEM_INFO OFFSET_OF (EFI_FILE_SYSTEM_INFO, VolumeLabel) 60 61 extern EFI_GUID gEfiFileSystemInfoGuid; 62 63 #endif 64