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c2df8e13 | 1 | /** @file\r |
2 | FFS file access utilities.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r | |
5 | \r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions\r | |
8 | of the BSD License which accompanies this distribution. The\r | |
9 | full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
15 | **/\r | |
16 | \r | |
17 | #include "FwVolDriver.h"\r | |
18 | \r | |
19 | #define PHYSICAL_ADDRESS_TO_POINTER(Address) ((VOID *) ((UINTN) Address))\r | |
20 | \r | |
21 | /**\r | |
22 | Set File State in the FfsHeader.\r | |
23 | \r | |
24 | @param State File state to be set into FFS header.\r | |
25 | @param FfsHeader Points to the FFS file header\r | |
26 | \r | |
27 | **/\r | |
28 | VOID\r | |
29 | SetFileState (\r | |
30 | IN UINT8 State,\r | |
31 | IN EFI_FFS_FILE_HEADER *FfsHeader\r | |
32 | )\r | |
33 | {\r | |
34 | //\r | |
35 | // Set File State in the FfsHeader\r | |
36 | //\r | |
37 | FfsHeader->State = (EFI_FFS_FILE_STATE) (FfsHeader->State ^ State);\r | |
38 | return ;\r | |
39 | }\r | |
40 | \r | |
41 | /**\r | |
42 | Get the FFS file state by checking the highest bit set in the header's state field.\r | |
43 | \r | |
44 | @param ErasePolarity Erase polarity attribute of the firmware volume\r | |
45 | @param FfsHeader Points to the FFS file header\r | |
46 | \r | |
47 | @return FFS File state\r | |
48 | \r | |
49 | **/\r | |
50 | EFI_FFS_FILE_STATE\r | |
51 | GetFileState (\r | |
52 | IN UINT8 ErasePolarity,\r | |
53 | IN EFI_FFS_FILE_HEADER *FfsHeader\r | |
54 | )\r | |
55 | {\r | |
56 | EFI_FFS_FILE_STATE FileState;\r | |
57 | UINT8 HighestBit;\r | |
58 | \r | |
59 | FileState = FfsHeader->State;\r | |
60 | \r | |
61 | if (ErasePolarity != 0) {\r | |
62 | FileState = (EFI_FFS_FILE_STATE)~FileState;\r | |
63 | }\r | |
64 | \r | |
65 | HighestBit = 0x80;\r | |
66 | while (HighestBit != 0 && ((HighestBit & FileState) == 0)) {\r | |
67 | HighestBit >>= 1;\r | |
68 | }\r | |
69 | \r | |
70 | return (EFI_FFS_FILE_STATE) HighestBit;\r | |
71 | }\r | |
72 | \r | |
73 | /**\r | |
74 | Convert the Buffer Address to LBA Entry Address.\r | |
75 | \r | |
76 | @param FvDevice Cached FvDevice\r | |
77 | @param BufferAddress Address of Buffer\r | |
78 | @param LbaListEntry Pointer to the got LBA entry that contains the address.\r | |
79 | \r | |
80 | @retval EFI_NOT_FOUND Buffer address is out of FvDevice.\r | |
81 | @retval EFI_SUCCESS LBA entry is found for Buffer address.\r | |
82 | \r | |
83 | **/\r | |
84 | EFI_STATUS\r | |
85 | Buffer2LbaEntry (\r | |
86 | IN FV_DEVICE *FvDevice,\r | |
87 | IN EFI_PHYSICAL_ADDRESS BufferAddress,\r | |
88 | OUT LBA_ENTRY **LbaListEntry\r | |
89 | )\r | |
90 | {\r | |
91 | LBA_ENTRY *LbaEntry;\r | |
92 | LIST_ENTRY *Link;\r | |
93 | \r | |
94 | Link = FvDevice->LbaHeader.ForwardLink;\r | |
95 | LbaEntry = (LBA_ENTRY *) Link;\r | |
96 | \r | |
97 | //\r | |
98 | // Locate LBA which contains the address\r | |
99 | //\r | |
100 | while (&LbaEntry->Link != &FvDevice->LbaHeader) {\r | |
101 | if ((EFI_PHYSICAL_ADDRESS) (UINTN) (LbaEntry->StartingAddress) > BufferAddress) {\r | |
102 | break;\r | |
103 | }\r | |
104 | \r | |
105 | Link = LbaEntry->Link.ForwardLink;\r | |
106 | LbaEntry = (LBA_ENTRY *) Link;\r | |
107 | }\r | |
108 | \r | |
109 | if (&LbaEntry->Link == &FvDevice->LbaHeader) {\r | |
110 | return EFI_NOT_FOUND;\r | |
111 | }\r | |
112 | \r | |
113 | Link = LbaEntry->Link.BackLink;\r | |
114 | LbaEntry = (LBA_ENTRY *) Link;\r | |
115 | \r | |
116 | if (&LbaEntry->Link == &FvDevice->LbaHeader) {\r | |
117 | return EFI_NOT_FOUND;\r | |
118 | }\r | |
119 | \r | |
120 | *LbaListEntry = LbaEntry;\r | |
121 | \r | |
122 | return EFI_SUCCESS;\r | |
123 | }\r | |
124 | \r | |
125 | /**\r | |
126 | Convert the Buffer Address to LBA Address & Offset.\r | |
127 | \r | |
128 | @param FvDevice Cached FvDevice\r | |
129 | @param BufferAddress Address of Buffer\r | |
130 | @param Lba Pointer to the gob Lba value\r | |
131 | @param Offset Pointer to the got Offset\r | |
132 | \r | |
133 | @retval EFI_NOT_FOUND Buffer address is out of FvDevice.\r | |
134 | @retval EFI_SUCCESS LBA and Offset is found for Buffer address.\r | |
135 | \r | |
136 | **/\r | |
137 | EFI_STATUS\r | |
138 | Buffer2Lba (\r | |
139 | IN FV_DEVICE *FvDevice,\r | |
140 | IN EFI_PHYSICAL_ADDRESS BufferAddress,\r | |
141 | OUT EFI_LBA *Lba,\r | |
142 | OUT UINTN *Offset\r | |
143 | )\r | |
144 | {\r | |
145 | LBA_ENTRY *LbaEntry;\r | |
146 | EFI_STATUS Status;\r | |
147 | \r | |
148 | LbaEntry = NULL;\r | |
149 | \r | |
150 | Status = Buffer2LbaEntry (\r | |
151 | FvDevice,\r | |
152 | BufferAddress,\r | |
153 | &LbaEntry\r | |
154 | );\r | |
155 | if (EFI_ERROR (Status)) {\r | |
156 | return Status;\r | |
157 | }\r | |
158 | \r | |
159 | *Lba = LbaEntry->LbaIndex;\r | |
160 | *Offset = (UINTN) BufferAddress - (UINTN) LbaEntry->StartingAddress;\r | |
161 | \r | |
162 | return EFI_SUCCESS;\r | |
163 | }\r | |
164 | \r | |
165 | /**\r | |
166 | Check if a block of buffer is erased.\r | |
167 | \r | |
168 | @param ErasePolarity Erase polarity attribute of the firmware volume\r | |
169 | @param Buffer The buffer to be checked\r | |
170 | @param BufferSize Size of the buffer in bytes\r | |
171 | \r | |
172 | @retval TRUE The block of buffer is erased\r | |
173 | @retval FALSE The block of buffer is not erased\r | |
174 | \r | |
175 | **/\r | |
176 | BOOLEAN\r | |
177 | IsBufferErased (\r | |
178 | IN UINT8 ErasePolarity,\r | |
179 | IN UINT8 *Buffer,\r | |
180 | IN UINTN BufferSize\r | |
181 | )\r | |
182 | {\r | |
183 | UINTN Count;\r | |
184 | UINT8 EraseByte;\r | |
185 | \r | |
186 | if (ErasePolarity == 1) {\r | |
187 | EraseByte = 0xFF;\r | |
188 | } else {\r | |
189 | EraseByte = 0;\r | |
190 | }\r | |
191 | \r | |
192 | for (Count = 0; Count < BufferSize; Count++) {\r | |
193 | if (Buffer[Count] != EraseByte) {\r | |
194 | return FALSE;\r | |
195 | }\r | |
196 | }\r | |
197 | \r | |
198 | return TRUE;\r | |
199 | }\r | |
200 | \r | |
201 | /**\r | |
202 | Verify checksum of the firmware volume header.\r | |
203 | \r | |
204 | @param FvHeader Points to the firmware volume header to be checked\r | |
205 | \r | |
206 | @retval TRUE Checksum verification passed\r | |
207 | @retval FALSE Checksum verification failed\r | |
208 | \r | |
209 | **/\r | |
210 | BOOLEAN\r | |
211 | VerifyFvHeaderChecksum (\r | |
212 | IN EFI_FIRMWARE_VOLUME_HEADER *FvHeader\r | |
213 | )\r | |
214 | {\r | |
215 | UINT16 Checksum;\r | |
216 | \r | |
217 | Checksum = CalculateSum16 ((UINT16 *) FvHeader, FvHeader->HeaderLength);\r | |
218 | \r | |
219 | if (Checksum == 0) {\r | |
220 | return TRUE;\r | |
221 | } else {\r | |
222 | return FALSE;\r | |
223 | }\r | |
224 | }\r | |
225 | \r | |
226 | /**\r | |
227 | Verify checksum of the FFS file header.\r | |
228 | \r | |
229 | @param FfsHeader Points to the FFS file header to be checked\r | |
230 | \r | |
231 | @retval TRUE Checksum verification passed\r | |
232 | @retval FALSE Checksum verification failed\r | |
233 | \r | |
234 | **/\r | |
235 | BOOLEAN\r | |
236 | VerifyHeaderChecksum (\r | |
237 | IN EFI_FFS_FILE_HEADER *FfsHeader\r | |
238 | )\r | |
239 | {\r | |
240 | UINT8 HeaderChecksum;\r | |
241 | \r | |
23491d5c SZ |
242 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
243 | HeaderChecksum = CalculateSum8 ((UINT8 *) FfsHeader, sizeof (EFI_FFS_FILE_HEADER2));\r | |
244 | } else {\r | |
245 | HeaderChecksum = CalculateSum8 ((UINT8 *) FfsHeader, sizeof (EFI_FFS_FILE_HEADER));\r | |
246 | }\r | |
c2df8e13 | 247 | HeaderChecksum = (UINT8) (HeaderChecksum - FfsHeader->State - FfsHeader->IntegrityCheck.Checksum.File);\r |
248 | \r | |
249 | if (HeaderChecksum == 0) {\r | |
250 | return TRUE;\r | |
251 | } else {\r | |
252 | return FALSE;\r | |
253 | }\r | |
254 | }\r | |
255 | \r | |
256 | /**\r | |
257 | Verify checksum of the FFS file data.\r | |
258 | \r | |
259 | @param FfsHeader Points to the FFS file header to be checked\r | |
260 | \r | |
261 | @retval TRUE Checksum verification passed\r | |
262 | @retval FALSE Checksum verification failed\r | |
263 | \r | |
264 | **/\r | |
265 | BOOLEAN\r | |
266 | VerifyFileChecksum (\r | |
267 | IN EFI_FFS_FILE_HEADER *FfsHeader\r | |
268 | )\r | |
269 | {\r | |
270 | UINT8 FileChecksum;\r | |
271 | EFI_FV_FILE_ATTRIBUTES Attributes;\r | |
c2df8e13 | 272 | \r |
273 | Attributes = FfsHeader->Attributes;\r | |
274 | \r | |
275 | if ((Attributes & FFS_ATTRIB_CHECKSUM) != 0) {\r | |
276 | \r | |
c2df8e13 | 277 | //\r |
278 | // Check checksum of FFS data\r | |
279 | //\r | |
23491d5c SZ |
280 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
281 | FileChecksum = CalculateSum8 ((UINT8 *) FfsHeader + sizeof (EFI_FFS_FILE_HEADER2), FFS_FILE2_SIZE (FfsHeader) - sizeof (EFI_FFS_FILE_HEADER2));\r | |
282 | } else {\r | |
283 | FileChecksum = CalculateSum8 ((UINT8 *) FfsHeader + sizeof (EFI_FFS_FILE_HEADER), FFS_FILE_SIZE (FfsHeader) - sizeof (EFI_FFS_FILE_HEADER));\r | |
284 | }\r | |
c2df8e13 | 285 | FileChecksum = (UINT8) (FileChecksum + FfsHeader->IntegrityCheck.Checksum.File);\r |
286 | \r | |
287 | if (FileChecksum == 0) {\r | |
288 | return TRUE;\r | |
289 | } else {\r | |
290 | return FALSE;\r | |
291 | }\r | |
292 | \r | |
293 | } else {\r | |
294 | \r | |
295 | if (FfsHeader->IntegrityCheck.Checksum.File != FFS_FIXED_CHECKSUM) {\r | |
296 | return FALSE;\r | |
297 | } else {\r | |
298 | return TRUE;\r | |
299 | }\r | |
300 | }\r | |
301 | \r | |
302 | }\r | |
303 | \r | |
304 | /**\r | |
305 | Check if it's a valid FFS file header.\r | |
306 | \r | |
307 | @param ErasePolarity Erase polarity attribute of the firmware volume\r | |
308 | @param FfsHeader Points to the FFS file header to be checked\r | |
309 | \r | |
310 | @retval TRUE Valid FFS file header\r | |
311 | @retval FALSE Invalid FFS file header\r | |
312 | \r | |
313 | **/\r | |
314 | BOOLEAN\r | |
315 | IsValidFFSHeader (\r | |
316 | IN UINT8 ErasePolarity,\r | |
317 | IN EFI_FFS_FILE_HEADER *FfsHeader\r | |
318 | )\r | |
319 | {\r | |
320 | EFI_FFS_FILE_STATE FileState;\r | |
321 | \r | |
322 | //\r | |
323 | // Check if it is a free space\r | |
324 | //\r | |
325 | if (IsBufferErased (\r | |
326 | ErasePolarity,\r | |
327 | (UINT8 *) FfsHeader,\r | |
328 | sizeof (EFI_FFS_FILE_HEADER)\r | |
329 | )) {\r | |
330 | return FALSE;\r | |
331 | }\r | |
332 | \r | |
333 | FileState = GetFileState (ErasePolarity, FfsHeader);\r | |
334 | \r | |
335 | switch (FileState) {\r | |
336 | case EFI_FILE_HEADER_CONSTRUCTION:\r | |
337 | //\r | |
338 | // fall through\r | |
339 | //\r | |
340 | case EFI_FILE_HEADER_INVALID:\r | |
341 | return FALSE;\r | |
342 | \r | |
343 | case EFI_FILE_HEADER_VALID:\r | |
344 | //\r | |
345 | // fall through\r | |
346 | //\r | |
347 | case EFI_FILE_DATA_VALID:\r | |
348 | //\r | |
349 | // fall through\r | |
350 | //\r | |
351 | case EFI_FILE_MARKED_FOR_UPDATE:\r | |
352 | //\r | |
353 | // fall through\r | |
354 | //\r | |
355 | case EFI_FILE_DELETED:\r | |
356 | //\r | |
357 | // Here we need to verify header checksum\r | |
358 | //\r | |
359 | if (!VerifyHeaderChecksum (FfsHeader)) {\r | |
360 | return FALSE;\r | |
361 | }\r | |
362 | break;\r | |
363 | \r | |
364 | default:\r | |
365 | //\r | |
366 | // return\r | |
367 | //\r | |
368 | return FALSE;\r | |
369 | }\r | |
370 | \r | |
371 | return TRUE;\r | |
372 | }\r | |
373 | \r | |
374 | /**\r | |
375 | Get next possible of Firmware File System Header.\r | |
376 | \r | |
377 | @param ErasePolarity Erase polarity attribute of the firmware volume\r | |
378 | @param FfsHeader Points to the FFS file header to be skipped.\r | |
379 | \r | |
380 | @return Pointer to next FFS header.\r | |
381 | \r | |
382 | **/\r | |
383 | EFI_PHYSICAL_ADDRESS\r | |
384 | GetNextPossibleFileHeader (\r | |
385 | IN UINT8 ErasePolarity,\r | |
386 | IN EFI_FFS_FILE_HEADER *FfsHeader\r | |
387 | )\r | |
388 | {\r | |
389 | UINT32 FileLength;\r | |
390 | UINT32 SkipLength;\r | |
391 | \r | |
392 | if (!IsValidFFSHeader (ErasePolarity, FfsHeader)) {\r | |
393 | //\r | |
394 | // Skip this header\r | |
395 | //\r | |
23491d5c SZ |
396 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
397 | return (EFI_PHYSICAL_ADDRESS) (UINTN) FfsHeader + sizeof (EFI_FFS_FILE_HEADER2);\r | |
398 | } else {\r | |
399 | return (EFI_PHYSICAL_ADDRESS) (UINTN) FfsHeader + sizeof (EFI_FFS_FILE_HEADER);\r | |
400 | }\r | |
c2df8e13 | 401 | }\r |
402 | \r | |
23491d5c SZ |
403 | if (IS_FFS_FILE2 (FfsHeader)) {\r |
404 | FileLength = FFS_FILE2_SIZE (FfsHeader);\r | |
405 | } else {\r | |
406 | FileLength = FFS_FILE_SIZE (FfsHeader);\r | |
407 | }\r | |
c2df8e13 | 408 | \r |
409 | //\r | |
410 | // Since FileLength is not multiple of 8, we need skip some bytes\r | |
411 | // to get next possible header\r | |
412 | //\r | |
413 | SkipLength = FileLength;\r | |
414 | while ((SkipLength & 0x07) != 0) {\r | |
415 | SkipLength++;\r | |
416 | }\r | |
417 | \r | |
418 | return (EFI_PHYSICAL_ADDRESS) (UINTN) FfsHeader + SkipLength;\r | |
419 | }\r | |
420 | \r | |
421 | /**\r | |
422 | Search FFS file with the same FFS name in FV Cache.\r | |
423 | \r | |
424 | @param FvDevice Cached FV image.\r | |
425 | @param FfsHeader Points to the FFS file header to be skipped.\r | |
426 | @param StateBit FFS file state bit to be checked.\r | |
427 | \r | |
428 | @return Pointer to next found FFS header. NULL will return if no found.\r | |
429 | \r | |
430 | **/\r | |
431 | EFI_FFS_FILE_HEADER *\r | |
432 | DuplicateFileExist (\r | |
433 | IN FV_DEVICE *FvDevice,\r | |
434 | IN EFI_FFS_FILE_HEADER *FfsHeader,\r | |
435 | IN EFI_FFS_FILE_STATE StateBit\r | |
436 | )\r | |
437 | {\r | |
438 | UINT8 *Ptr;\r | |
439 | EFI_FFS_FILE_HEADER *NextFfsFile;\r | |
440 | \r | |
441 | //\r | |
442 | // Search duplicate file, not from the beginning of FV,\r | |
443 | // just search the next ocurrence of this file\r | |
444 | //\r | |
445 | NextFfsFile = FfsHeader;\r | |
446 | \r | |
447 | do {\r | |
448 | Ptr = (UINT8 *) PHYSICAL_ADDRESS_TO_POINTER (\r | |
449 | GetNextPossibleFileHeader (FvDevice->ErasePolarity,\r | |
450 | NextFfsFile)\r | |
451 | );\r | |
452 | NextFfsFile = (EFI_FFS_FILE_HEADER *) Ptr;\r | |
453 | \r | |
454 | if ((UINT8 *) PHYSICAL_ADDRESS_TO_POINTER (FvDevice->CachedFv) + FvDevice->FwVolHeader->FvLength - Ptr <\r | |
455 | sizeof (EFI_FFS_FILE_HEADER)\r | |
456 | ) {\r | |
457 | break;\r | |
458 | }\r | |
459 | \r | |
460 | if (!IsValidFFSHeader (FvDevice->ErasePolarity, NextFfsFile)) {\r | |
461 | continue;\r | |
462 | }\r | |
463 | \r | |
464 | if (!VerifyFileChecksum (NextFfsFile)) {\r | |
465 | continue;\r | |
466 | }\r | |
467 | \r | |
468 | if (CompareGuid (&NextFfsFile->Name, &FfsHeader->Name)) {\r | |
469 | if (GetFileState (FvDevice->ErasePolarity, NextFfsFile) == StateBit) {\r | |
470 | return NextFfsFile;\r | |
471 | }\r | |
472 | }\r | |
473 | } while (Ptr < (UINT8 *) PHYSICAL_ADDRESS_TO_POINTER (FvDevice->CachedFv) + FvDevice->FwVolHeader->FvLength);\r | |
474 | \r | |
475 | return NULL;\r | |
476 | }\r | |
477 | \r | |
478 | /**\r | |
479 | Change FFS file header state and write to FV.\r | |
480 | \r | |
481 | @param FvDevice Cached FV image.\r | |
482 | @param FfsHeader Points to the FFS file header to be updated.\r | |
483 | @param State FFS file state to be set.\r | |
484 | \r | |
485 | @retval EFI_SUCCESS File state is writen into FV.\r | |
486 | @retval others File state can't be writen into FV.\r | |
487 | \r | |
488 | **/\r | |
489 | EFI_STATUS\r | |
490 | UpdateHeaderBit (\r | |
491 | IN FV_DEVICE *FvDevice,\r | |
492 | IN EFI_FFS_FILE_HEADER *FfsHeader,\r | |
493 | IN EFI_FFS_FILE_STATE State\r | |
494 | )\r | |
495 | {\r | |
496 | EFI_STATUS Status;\r | |
497 | EFI_LBA Lba;\r | |
498 | UINTN Offset;\r | |
499 | UINTN NumBytesWritten;\r | |
500 | \r | |
501 | Lba = 0;\r | |
502 | Offset = 0;\r | |
503 | \r | |
504 | SetFileState (State, FfsHeader);\r | |
505 | \r | |
506 | Buffer2Lba (\r | |
507 | FvDevice,\r | |
508 | (EFI_PHYSICAL_ADDRESS) (UINTN) (&FfsHeader->State),\r | |
509 | &Lba,\r | |
510 | &Offset\r | |
511 | );\r | |
512 | //\r | |
513 | // Write the state byte into FV\r | |
514 | //\r | |
515 | NumBytesWritten = sizeof (EFI_FFS_FILE_STATE);\r | |
516 | Status = FvDevice->Fvb->Write (\r | |
517 | FvDevice->Fvb,\r | |
518 | Lba,\r | |
519 | Offset,\r | |
520 | &NumBytesWritten,\r | |
521 | &FfsHeader->State\r | |
522 | );\r | |
523 | return Status;\r | |
524 | }\r | |
525 | \r | |
526 | /**\r | |
527 | Check if it's a valid FFS file.\r | |
528 | Here we are sure that it has a valid FFS file header since we must call IsValidFfsHeader() first.\r | |
529 | \r | |
530 | @param FvDevice Cached FV image.\r | |
531 | @param FfsHeader Points to the FFS file to be checked\r | |
532 | \r | |
533 | @retval TRUE Valid FFS file\r | |
534 | @retval FALSE Invalid FFS file\r | |
535 | \r | |
536 | **/\r | |
537 | BOOLEAN\r | |
538 | IsValidFFSFile (\r | |
539 | IN FV_DEVICE *FvDevice,\r | |
540 | IN EFI_FFS_FILE_HEADER *FfsHeader\r | |
541 | )\r | |
542 | {\r | |
543 | EFI_FFS_FILE_STATE FileState;\r | |
544 | UINT8 ErasePolarity;\r | |
545 | \r | |
546 | ErasePolarity = FvDevice->ErasePolarity;\r | |
547 | \r | |
548 | FileState = GetFileState (ErasePolarity, FfsHeader);\r | |
549 | \r | |
550 | switch (FileState) {\r | |
551 | case EFI_FILE_DATA_VALID:\r | |
552 | if (!VerifyFileChecksum (FfsHeader)) {\r | |
553 | return FALSE;\r | |
554 | }\r | |
555 | \r | |
556 | if (FfsHeader->Type == EFI_FV_FILETYPE_FFS_PAD) {\r | |
557 | break;\r | |
558 | }\r | |
559 | //\r | |
560 | // Check if there is another duplicated file with the EFI_FILE_DATA_VALID\r | |
561 | //\r | |
562 | if (DuplicateFileExist (FvDevice, FfsHeader, EFI_FILE_DATA_VALID) != NULL) {\r | |
563 | return FALSE;\r | |
564 | }\r | |
565 | \r | |
566 | break;\r | |
567 | \r | |
568 | case EFI_FILE_MARKED_FOR_UPDATE:\r | |
569 | if (!VerifyFileChecksum (FfsHeader)) {\r | |
570 | return FALSE;\r | |
571 | }\r | |
572 | \r | |
573 | if (FfsHeader->Type == EFI_FV_FILETYPE_FFS_PAD) {\r | |
574 | //\r | |
575 | // since its data area is not unperturbed, it cannot be reclaimed,\r | |
576 | // marked it as deleted\r | |
577 | //\r | |
578 | UpdateHeaderBit (FvDevice, FfsHeader, EFI_FILE_DELETED);\r | |
579 | return TRUE;\r | |
580 | \r | |
581 | } else if (DuplicateFileExist (FvDevice, FfsHeader, EFI_FILE_DATA_VALID) != NULL) {\r | |
582 | //\r | |
583 | // Here the found file is more recent than this file,\r | |
584 | // mark it as deleted\r | |
585 | //\r | |
586 | UpdateHeaderBit (FvDevice, FfsHeader, EFI_FILE_DELETED);\r | |
587 | return TRUE;\r | |
588 | \r | |
589 | } else {\r | |
590 | return TRUE;\r | |
591 | }\r | |
592 | \r | |
593 | break;\r | |
594 | \r | |
595 | case EFI_FILE_DELETED:\r | |
596 | if (!VerifyFileChecksum (FfsHeader)) {\r | |
597 | return FALSE;\r | |
598 | }\r | |
599 | \r | |
600 | break;\r | |
601 | \r | |
602 | default:\r | |
603 | return FALSE;\r | |
604 | }\r | |
605 | \r | |
606 | return TRUE;\r | |
607 | }\r | |
608 | \r |