1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
|
/*++
Copyright (c) 2004, 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:
SimpleFileSystem.h
Abstract:
SimpleFileSystem protocol as defined in the EFI 1.0 specification.
The SimpleFileSystem protocol is the programatic access to the FAT (12,16,32)
file system specified in EFI 1.0. It can also be used to abstract a file
system other than FAT.
EFI 1.0 can boot from any valid EFI image contained in a SimpleFileSystem
--*/
#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} \
}
EFI_FORWARD_DECLARATION (EFI_SIMPLE_FILE_SYSTEM_PROTOCOL);
EFI_FORWARD_DECLARATION (EFI_FILE);
typedef
EFI_STATUS
(EFIAPI *EFI_VOLUME_OPEN) (
IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL * This,
OUT EFI_FILE **Root
)
/*++
Routine Description:
Open the root directory on a volume.
Arguments:
This - Protocol instance pointer.
Root - Returns an Open file handle for the root directory
Returns:
EFI_SUCCESS - The device was opened.
EFI_UNSUPPORTED - This volume does not suppor the file system.
EFI_NO_MEDIA - The device has no media.
EFI_DEVICE_ERROR - The device reported an error.
EFI_VOLUME_CORRUPTED - The file system structures are corrupted
EFI_ACCESS_DENIED - The service denied access to the file
EFI_OUT_OF_RESOURCES - The volume was not opened due to lack of resources
--*/
;
#define EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_REVISION 0x00010000
struct _EFI_SIMPLE_FILE_SYSTEM_PROTOCOL {
UINT64 Revision;
EFI_VOLUME_OPEN OpenVolume;
};
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_OPEN) (
IN EFI_FILE * File,
OUT EFI_FILE **NewHandle,
IN CHAR16 *FileName,
IN UINT64 OpenMode,
IN UINT64 Attributes
)
/*++
Routine Description:
Open the root directory on a volume.
Arguments:
File - Protocol instance pointer.
NewHandle - Returns File Handle for FileName
FileName - Null terminated string. "\", ".", and ".." are supported
OpenMode - Open mode for file.
Attributes - Only used for EFI_FILE_MODE_CREATE
Returns:
EFI_SUCCESS - The device was opened.
EFI_NOT_FOUND - The specified file could not be found on the device
EFI_NO_MEDIA - The device has no media.
EFI_MEDIA_CHANGED - The media has changed
EFI_DEVICE_ERROR - The device reported an error.
EFI_VOLUME_CORRUPTED - The file system structures are corrupted
EFI_ACCESS_DENIED - The service denied access to the file
EFI_OUT_OF_RESOURCES - The volume was not opened due to lack of resources
EFI_VOLUME_FULL - The volume is full.
--*/
;
//
// Open modes
//
#define EFI_FILE_MODE_READ 0x0000000000000001
#define EFI_FILE_MODE_WRITE 0x0000000000000002
#define EFI_FILE_MODE_CREATE 0x8000000000000000
//
// File attributes
//
#define EFI_FILE_READ_ONLY 0x0000000000000001
#define EFI_FILE_HIDDEN 0x0000000000000002
#define EFI_FILE_SYSTEM 0x0000000000000004
#define EFI_FILE_RESERVED 0x0000000000000008
#define EFI_FILE_DIRECTORY 0x0000000000000010
#define EFI_FILE_ARCHIVE 0x0000000000000020
#define EFI_FILE_VALID_ATTR 0x0000000000000037
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_CLOSE) (
IN EFI_FILE * File
)
/*++
Routine Description:
Close the file handle
Arguments:
File - Protocol instance pointer.
Returns:
EFI_SUCCESS- The device was opened.
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_DELETE) (
IN EFI_FILE * File
)
/*++
Routine Description:
Close and delete the file handle
Arguments:
File - Protocol instance pointer.
Returns:
EFI_SUCCESS - The device was opened.
EFI_WARN_DELETE_FAILURE - The handle was closed but the file was not
deleted
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_READ) (
IN EFI_FILE * File,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
/*++
Routine Description:
Read data from the file.
Arguments:
File - Protocol instance pointer.
BufferSize - On input size of buffer, on output amount of data in
buffer.
Buffer - The buffer in which data is read.
Returns:
EFI_SUCCESS - Data was read.
EFI_NO_MEDIA - The device has no media
EFI_DEVICE_ERROR - The device reported an error
EFI_VOLUME_CORRUPTED - The file system structures are corrupted
EFI_BUFFER_TO_SMALL - BufferSize is too small. BufferSize contains
required size
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_WRITE) (
IN EFI_FILE * File,
IN OUT UINTN *BufferSize,
IN VOID *Buffer
)
/*++
Routine Description:
Write data from to the file.
Arguments:
File - Protocol instance pointer.
BufferSize - On input size of buffer, on output amount of data in buffer.
Buffer - The buffer in which data to write.
Returns:
EFI_SUCCESS - Data was written.
EFI_UNSUPPORT - Writes to Open directory are not supported
EFI_NO_MEDIA - The device has no media
EFI_DEVICE_ERROR - The device reported an error
EFI_VOLUME_CORRUPTED - The file system structures are corrupted
EFI_WRITE_PROTECTED - The device is write protected
EFI_ACCESS_DENIED - The file was open for read only
EFI_VOLUME_FULL - The volume is full
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_SET_POSITION) (
IN EFI_FILE * File,
IN UINT64 Position
)
/*++
Routine Description:
Set a files current position
Arguments:
File - Protocol instance pointer.
Position - Byte possition from the start of the file
Returns:
EFI_SUCCESS - Data was written.
EFI_UNSUPPORTED - Seek request for non-zero is not valid on open.
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_GET_POSITION) (
IN EFI_FILE * File,
OUT UINT64 *Position
)
/*++
Routine Description:
Get a files current position
Arguments:
File - Protocol instance pointer.
Position - Byte possition from the start of the file
Returns:
EFI_SUCCESS - Data was written.
EFI_UNSUPPORTED - Seek request for non-zero is not valid on open.
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_GET_INFO) (
IN EFI_FILE * File,
IN EFI_GUID * InformationType,
IN OUT UINTN *BufferSize,
OUT VOID *Buffer
)
/*++
Routine Description:
Get information about a file
Arguments:
File - Protocol instance pointer.
InformationType - Type of info to return in Buffer
BufferSize - On input size of buffer, on output amount of data in
buffer.
Buffer - The buffer to return data.
Returns:
EFI_SUCCESS - Data was returned.
EFI_UNSUPPORT - InformationType is not supported
EFI_NO_MEDIA - The device has no media
EFI_DEVICE_ERROR - The device reported an error
EFI_VOLUME_CORRUPTED - The file system structures are corrupted
EFI_WRITE_PROTECTED - The device is write protected
EFI_ACCESS_DENIED - The file was open for read only
EFI_BUFFER_TOO_SMALL - Buffer was too small, required size returned in
BufferSize
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_SET_INFO) (
IN EFI_FILE * File,
IN EFI_GUID * InformationType,
IN UINTN BufferSize,
IN VOID *Buffer
)
/*++
Routine Description:
Set information about a file
Arguments:
File - Protocol instance pointer.
InformationType - Type of info in Buffer
BufferSize - Size of buffer.
Buffer - The data to write.
Returns:
EFI_SUCCESS - Data was returned.
EFI_UNSUPPORT - InformationType is not supported
EFI_NO_MEDIA - The device has no media
EFI_DEVICE_ERROR - The device reported an error
EFI_VOLUME_CORRUPTED - The file system structures are corrupted
EFI_WRITE_PROTECTED - The device is write protected
EFI_ACCESS_DENIED - The file was open for read only
--*/
;
typedef
EFI_STATUS
(EFIAPI *EFI_FILE_FLUSH) (
IN EFI_FILE * File
)
/*++
Routine Description:
Flush data back for the file handle
Arguments:
File - Protocol instance pointer.
Returns:
EFI_SUCCESS - Data was written.
EFI_UNSUPPORT - Writes to Open directory are not supported
EFI_NO_MEDIA - The device has no media
EFI_DEVICE_ERROR - The device reported an error
EFI_VOLUME_CORRUPTED - The file system structures are corrupted
EFI_WRITE_PROTECTED - The device is write protected
EFI_ACCESS_DENIED - The file was open for read only
EFI_VOLUME_FULL - The volume is full
--*/
;
#define EFI_FILE_HANDLE_REVISION 0x00010000
typedef struct _EFI_FILE {
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;
} *EFI_FILE_HANDLE;
extern EFI_GUID gEfiSimpleFileSystemProtocolGuid;
#endif
|