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/** @file
SimpleFileSystem protocol as defined in the UEFI 2.0 specification.
The SimpleFileSystem protocol is the programmatic access to the FAT (12,16,32)
file system specified in UEFI 2.0. It can also be used to abstract a file
system other than FAT.
UEFI 2.0 can boot from any valid EFI image contained in a SimpleFileSystem.
Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that 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.
**/
#ifndef __SIMPLE_FILE_SYSTEM_H__
#define __SIMPLE_FILE_SYSTEM_H__
#define EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID \
{ \
0x964e5b22, 0x6459, 0x11d2, {0x8e, 0x39, 0x0, 0xa0, 0xc9, 0x69, 0x72, 0x3b } \
}
typedef struct _EFI_SIMPLE_FILE_SYSTEM_PROTOCOL EFI_SIMPLE_FILE_SYSTEM_PROTOCOL;
typedef struct _EFI_FILE_PROTOCOL EFI_FILE_PROTOCOL;
typedef struct _EFI_FILE_PROTOCOL *EFI_FILE_HANDLE;
///
/// Protocol GUID name defined in EFI1.1.
///
#define SIMPLE_FILE_SYSTEM_PROTOCOL EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID
///
/// Protocol name defined in EFI1.1.
///
typedef EFI_SIMPLE_FILE_SYSTEM_PROTOCOL EFI_FILE_IO_INTERFACE;
typedef EFI_FILE_PROTOCOL EFI_FILE;
/**
Open the root directory on a volume.
@param This Protocol instance pointer.
@param Root Returns an Open file handle for the root directory
@retval EFI_SUCCESS The device was opened.
@retval EFI_UNSUPPORTED This volume does not support the file system.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_ACCESS_DENIED The service denied access to the file.
@retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of resources.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_OPEN_VOLUME)(
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **Root
);
#define EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION 0x00010000
///
/// Revision defined in EFI1.1
///
#define EFI_FILE_IO_INTERFACE_REVISION EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION
struct _EFI_SIMPLE_FILE_SYSTEM_PROTOCOL {
///
/// The version of the EFI_SIMPLE_FILE_SYSTEM_PROTOCOL. The version
/// specified by this specification is 0x00010000. All future revisions
/// must be backwards compatible.
///
UINT64 Revision;
EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_OPEN_VOLUME OpenVolume;
};
/**
Opens a new file relative to the source file's location.
@param This The protocol instance pointer.
@param NewHandle Returns File Handle for FileName.
@param FileName Null terminated string. "\", ".", and ".." are supported.
@param OpenMode Open mode for file.
@param Attributes Only used for EFI_FILE_MODE_CREATE.
@retval EFI_SUCCESS The device was opened.
@retval EFI_NOT_FOUND The specified file could not be found on the device.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_MEDIA_CHANGED The media has changed.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_ACCESS_DENIED The service denied access to the file.
@retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of resources.
@retval EFI_VOLUME_FULL The volume is full.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_OPEN)(
IN EFI_FILE_PROTOCOL *This,
OUT EFI_FILE_PROTOCOL **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes
);
//
// Open modes
//
#define EFI_FILE_MODE_READ 0x0000000000000001ULL
#define EFI_FILE_MODE_WRITE 0x0000000000000002ULL
#define EFI_FILE_MODE_CREATE 0x8000000000000000ULL
//
// File attributes
//
#define EFI_FILE_READ_ONLY 0x0000000000000001ULL
#define EFI_FILE_HIDDEN 0x0000000000000002ULL
#define EFI_FILE_SYSTEM 0x0000000000000004ULL
#define EFI_FILE_RESERVED 0x0000000000000008ULL
#define EFI_FILE_DIRECTORY 0x0000000000000010ULL
#define EFI_FILE_ARCHIVE 0x0000000000000020ULL
#define EFI_FILE_VALID_ATTR 0x0000000000000037ULL
/**
Close the file handle
@param This Protocol instance pointer.
@retval EFI_SUCCESS The device was opened.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_CLOSE)(
IN EFI_FILE_PROTOCOL *This
);
/**
Close and delete the file handle.
@param This Protocol instance pointer.
@retval EFI_SUCCESS The device was opened.
@retval EFI_WARN_DELETE_FAILURE The handle was closed but the file was not deleted.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_DELETE)(
IN EFI_FILE_PROTOCOL *This
);
/**
Read data from the file.
@param This Protocol instance pointer.
@param BufferSize On input size of buffer, on output amount of data in buffer.
@param Buffer The buffer in which data is read.
@retval EFI_SUCCESS Data was read.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_BUFFER_TO_SMALL BufferSize is too small. BufferSize contains required size.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_READ)(
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
);
/**
Write data to a file.
@param This Protocol instance pointer.
@param BufferSize On input size of buffer, on output amount of data in buffer.
@param Buffer The buffer in which data to write.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORT Writes to Open directory are not supported.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_DEVICE_ERROR An attempt was made to write to a deleted file.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The device is write protected.
@retval EFI_ACCESS_DENIED The file was open for read only.
@retval EFI_VOLUME_FULL The volume is full.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_WRITE)(
IN EFI_FILE_PROTOCOL *This,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
);
/**
Set a files current position
@param This Protocol instance pointer.
@param Position Byte position from the start of the file.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORTED Seek request for non-zero is not valid on open.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_SET_POSITION)(
IN EFI_FILE_PROTOCOL *This,
IN UINT64 Position
);
/**
Get a file's current position
@param This Protocol instance pointer.
@param Position Byte position from the start of the file.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORTED Seek request for non-zero is not valid on open..
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_GET_POSITION)(
IN EFI_FILE_PROTOCOL *This,
OUT UINT64 *Position
);
/**
Get information about a file.
@param This Protocol instance pointer.
@param InformationType Type of information to return in Buffer.
@param BufferSize On input size of buffer, on output amount of data in buffer.
@param Buffer The buffer to return data.
@retval EFI_SUCCESS Data was returned.
@retval EFI_UNSUPPORT InformationType is not supported.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The device is write protected.
@retval EFI_ACCESS_DENIED The file was open for read only.
@retval EFI_BUFFER_TOO_SMALL Buffer was too small; required size returned in BufferSize.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_GET_INFO)(
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
);
/**
Set information about a file
@param File Protocol instance pointer.
@param InformationType Type of information in Buffer.
@param BufferSize Size of buffer.
@param Buffer The data to write.
@retval EFI_SUCCESS Data was returned.
@retval EFI_UNSUPPORT InformationType is not supported.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The device is write protected.
@retval EFI_ACCESS_DENIED The file was open for read only.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_SET_INFO)(
IN EFI_FILE_PROTOCOL *This,
IN EFI_GUID *InformationType,
IN UINTN BufferSize,
IN VOID *Buffer
);
/**
Flush data back for the file handle.
@param This Protocol instance pointer.
@retval EFI_SUCCESS Data was written.
@retval EFI_UNSUPPORT Writes to Open directory are not supported.
@retval EFI_NO_MEDIA The device has no media.
@retval EFI_DEVICE_ERROR The device reported an error.
@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.
@retval EFI_WRITE_PROTECTED The device is write protected.
@retval EFI_ACCESS_DENIED The file was open for read only.
@retval EFI_VOLUME_FULL The volume is full.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_FLUSH)(
IN EFI_FILE_PROTOCOL *This
);
#define EFI_FILE_PROTOCOL_REVISION 0x00010000
//
// Revision defined in EFI1.1.
//
#define EFI_FILE_REVISION EFI_FILE_PROTOCOL_REVISION
///
/// The EFI_FILE_PROTOCOL provides file IO access to supported file systems.
/// An EFI_FILE_PROTOCOL provides access to a file's or directory's contents,
/// and is also a reference to a location in the directory tree of the file system
/// in which the file resides. With any given file handle, other files may be opened
/// relative to this file's location, yielding new file handles.
///
struct _EFI_FILE_PROTOCOL {
///
/// The version of the EFI_FILE_PROTOCOL interface. The version specified
/// by this specification is 0x00010000. Future versions are required
/// to be backward compatible to version 1.0.
///
UINT64 Revision;
EFI_FILE_OPEN Open;
EFI_FILE_CLOSE Close;
EFI_FILE_DELETE Delete;
EFI_FILE_READ Read;
EFI_FILE_WRITE Write;
EFI_FILE_GET_POSITION GetPosition;
EFI_FILE_SET_POSITION SetPosition;
EFI_FILE_GET_INFO GetInfo;
EFI_FILE_SET_INFO SetInfo;
EFI_FILE_FLUSH Flush;
};
extern EFI_GUID gEfiSimpleFileSystemProtocolGuid;
#endif
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