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b9ec9330 QH |
1 | /*++\r |
2 | \r | |
149d6335 | 3 | Copyright (c) 2005 - 2013, Intel Corporation. All rights reserved.<BR>\r |
6163cc98 | 4 | This program and the accompanying materials are licensed and made available\r |
b9ec9330 QH |
5 | under the terms and conditions of the BSD License which accompanies this\r |
6 | distribution. The full text of the license may be found at\r | |
7 | http://opensource.org/licenses/bsd-license.php\r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
11 | \r | |
12 | \r | |
13 | Module Name:\r | |
14 | \r | |
15 | Misc.c\r | |
16 | \r | |
17 | Abstract:\r | |
18 | \r | |
19 | Miscellaneous functions\r | |
20 | \r | |
21 | Revision History\r | |
22 | \r | |
23 | --*/\r | |
24 | \r | |
25 | #include "Fat.h"\r | |
26 | \r | |
149d6335 RN |
27 | FAT_TASK *\r |
28 | FatCreateTask (\r | |
29 | FAT_IFILE *IFile,\r | |
30 | EFI_FILE_IO_TOKEN *Token\r | |
31 | )\r | |
32 | /*++\r | |
33 | \r | |
34 | Routine Description:\r | |
35 | \r | |
36 | Create the task\r | |
37 | \r | |
38 | Arguments:\r | |
39 | \r | |
40 | IFile - The instance of the open file.\r | |
41 | Token - A pointer to the token associated with the transaction.\r | |
42 | \r | |
43 | Return:\r | |
44 | FAT_TASK * - Return the task instance.\r | |
45 | **/\r | |
46 | {\r | |
47 | FAT_TASK *Task;\r | |
48 | \r | |
49 | Task = AllocateZeroPool (sizeof (*Task));\r | |
50 | if (Task != NULL) {\r | |
51 | Task->Signature = FAT_TASK_SIGNATURE;\r | |
52 | Task->IFile = IFile;\r | |
53 | Task->FileIoToken = Token;\r | |
54 | InitializeListHead (&Task->Subtasks);\r | |
55 | InitializeListHead (&Task->Link);\r | |
56 | }\r | |
57 | return Task;\r | |
58 | }\r | |
59 | \r | |
60 | VOID\r | |
61 | FatDestroyTask (\r | |
62 | FAT_TASK *Task\r | |
63 | )\r | |
64 | /*++\r | |
65 | \r | |
66 | Routine Description:\r | |
67 | \r | |
68 | Destroy the task\r | |
69 | \r | |
70 | Arguments:\r | |
71 | \r | |
72 | Task - The task to be destroyed.\r | |
73 | **/\r | |
74 | {\r | |
75 | LIST_ENTRY *Link;\r | |
76 | FAT_SUBTASK *Subtask;\r | |
77 | \r | |
78 | Link = GetFirstNode (&Task->Subtasks);\r | |
79 | while (!IsNull (&Task->Subtasks, Link)) {\r | |
80 | Subtask = CR (Link, FAT_SUBTASK, Link, FAT_SUBTASK_SIGNATURE);\r | |
81 | Link = FatDestroySubtask (Subtask);\r | |
82 | }\r | |
149d6335 RN |
83 | FreePool (Task);\r |
84 | }\r | |
85 | \r | |
86 | VOID\r | |
87 | FatWaitNonblockingTask (\r | |
88 | FAT_IFILE *IFile\r | |
89 | )\r | |
90 | /*++\r | |
91 | \r | |
92 | Routine Description:\r | |
93 | \r | |
94 | Wait all non-blocking requests complete.\r | |
95 | \r | |
96 | Arguments:\r | |
97 | \r | |
98 | IFile - The instance of the open file.\r | |
99 | **/\r | |
100 | {\r | |
101 | BOOLEAN TaskQueueEmpty;\r | |
102 | \r | |
103 | do {\r | |
104 | EfiAcquireLock (&FatTaskLock);\r | |
105 | TaskQueueEmpty = IsListEmpty (&IFile->Tasks);\r | |
106 | EfiReleaseLock (&FatTaskLock);\r | |
107 | } while (!TaskQueueEmpty);\r | |
108 | }\r | |
109 | \r | |
110 | LIST_ENTRY *\r | |
111 | FatDestroySubtask (\r | |
112 | FAT_SUBTASK *Subtask\r | |
113 | )\r | |
114 | /*++\r | |
115 | \r | |
116 | Routine Description:\r | |
117 | \r | |
118 | Remove the subtask from subtask list.\r | |
119 | \r | |
120 | Arguments:\r | |
121 | \r | |
122 | Subtask - The subtask to be removed.\r | |
123 | \r | |
124 | Returns:\r | |
125 | \r | |
126 | LIST_ENTRY * - The next node in the list.\r | |
127 | \r | |
128 | --*/\r | |
129 | {\r | |
130 | LIST_ENTRY *Link;\r | |
131 | \r | |
132 | gBS->CloseEvent (Subtask->DiskIo2Token.Event);\r | |
133 | \r | |
134 | Link = RemoveEntryList (&Subtask->Link);\r | |
135 | FreePool (Subtask);\r | |
136 | \r | |
137 | return Link;\r | |
138 | }\r | |
139 | \r | |
140 | EFI_STATUS\r | |
141 | FatQueueTask (\r | |
142 | IN FAT_IFILE *IFile,\r | |
143 | IN FAT_TASK *Task\r | |
144 | )\r | |
145 | /*++\r | |
146 | \r | |
147 | Routine Description:\r | |
148 | \r | |
149 | Execute the task\r | |
150 | \r | |
151 | Arguments:\r | |
152 | \r | |
153 | IFile - The instance of the open file.\r | |
154 | Task - The task to be executed.\r | |
155 | \r | |
156 | Returns:\r | |
157 | \r | |
158 | EFI_SUCCESS - The task was executed sucessfully.\r | |
159 | other - An error occurred when executing the task.\r | |
160 | \r | |
161 | --*/\r | |
162 | {\r | |
163 | EFI_STATUS Status;\r | |
164 | LIST_ENTRY *Link;\r | |
165 | FAT_SUBTASK *Subtask;\r | |
166 | \r | |
167 | //\r | |
168 | // Sometimes the Task doesn't contain any subtasks, signal the event directly.\r | |
169 | //\r | |
170 | if (IsListEmpty (&Task->Subtasks)) {\r | |
171 | Task->FileIoToken->Status = EFI_SUCCESS;\r | |
172 | gBS->SignalEvent (Task->FileIoToken->Event);\r | |
173 | FreePool (Task);\r | |
174 | return EFI_SUCCESS;\r | |
175 | }\r | |
176 | \r | |
177 | EfiAcquireLock (&FatTaskLock);\r | |
178 | InsertTailList (&IFile->Tasks, &Task->Link);\r | |
179 | EfiReleaseLock (&FatTaskLock);\r | |
180 | \r | |
181 | Status = EFI_SUCCESS;\r | |
182 | for ( Link = GetFirstNode (&Task->Subtasks)\r | |
183 | ; !IsNull (&Task->Subtasks, Link)\r | |
184 | ; Link = GetNextNode (&Task->Subtasks, Link)\r | |
185 | ) {\r | |
186 | Subtask = CR (Link, FAT_SUBTASK, Link, FAT_SUBTASK_SIGNATURE);\r | |
187 | if (Subtask->Write) {\r | |
188 | \r | |
189 | Status = IFile->OFile->Volume->DiskIo2->WriteDiskEx (\r | |
190 | IFile->OFile->Volume->DiskIo2,\r | |
191 | IFile->OFile->Volume->MediaId,\r | |
192 | Subtask->Offset,\r | |
193 | &Subtask->DiskIo2Token,\r | |
194 | Subtask->BufferSize,\r | |
195 | Subtask->Buffer\r | |
196 | );\r | |
197 | } else {\r | |
198 | Status = IFile->OFile->Volume->DiskIo2->ReadDiskEx (\r | |
199 | IFile->OFile->Volume->DiskIo2,\r | |
200 | IFile->OFile->Volume->MediaId,\r | |
201 | Subtask->Offset,\r | |
202 | &Subtask->DiskIo2Token,\r | |
203 | Subtask->BufferSize,\r | |
204 | Subtask->Buffer\r | |
205 | );\r | |
206 | }\r | |
207 | if (EFI_ERROR (Status)) {\r | |
208 | break;\r | |
209 | }\r | |
210 | }\r | |
211 | \r | |
212 | if (EFI_ERROR (Status)) {\r | |
213 | EfiAcquireLock (&FatTaskLock);\r | |
214 | //\r | |
215 | // Remove all the remaining subtasks when failure.\r | |
216 | // We shouldn't remove all the tasks because the non-blocking requests have\r | |
217 | // been submitted and cannot be canceled.\r | |
218 | //\r | |
219 | while (!IsNull (&Task->Subtasks, Link)) {\r | |
220 | Subtask = CR (Link, FAT_SUBTASK, Link, FAT_SUBTASK_SIGNATURE);\r | |
221 | Link = FatDestroySubtask (Subtask);\r | |
222 | }\r | |
223 | \r | |
224 | if (IsListEmpty (&Task->Subtasks)) {\r | |
225 | RemoveEntryList (&Task->Link);\r | |
226 | FreePool (Task);\r | |
227 | } else {\r | |
228 | //\r | |
229 | // If one or more subtasks have been already submitted, set FileIoToken\r | |
230 | // to NULL so that the callback won't signal the event.\r | |
231 | //\r | |
232 | Task->FileIoToken = NULL;\r | |
233 | }\r | |
234 | \r | |
235 | EfiReleaseLock (&FatTaskLock);\r | |
236 | }\r | |
237 | \r | |
238 | return Status;\r | |
239 | }\r | |
240 | \r | |
b9ec9330 QH |
241 | EFI_STATUS\r |
242 | FatAccessVolumeDirty (\r | |
243 | IN FAT_VOLUME *Volume,\r | |
244 | IN IO_MODE IoMode,\r | |
245 | IN VOID *DirtyValue\r | |
246 | )\r | |
247 | /*++\r | |
248 | \r | |
249 | Routine Description:\r | |
250 | \r | |
251 | Set the volume as dirty or not\r | |
252 | \r | |
253 | Arguments:\r | |
254 | \r | |
255 | Volume - FAT file system volume.\r | |
256 | IoMode - The access mode.\r | |
257 | DirtyValue - Set the volume as dirty or not.\r | |
258 | \r | |
259 | Returns:\r | |
260 | \r | |
261 | EFI_SUCCESS - Set the new FAT entry value sucessfully.\r | |
262 | other - An error occurred when operation the FAT entries.\r | |
263 | \r | |
264 | --*/\r | |
265 | {\r | |
266 | UINTN WriteCount;\r | |
267 | \r | |
268 | WriteCount = Volume->FatEntrySize;\r | |
149d6335 RN |
269 | return FatDiskIo (Volume, IoMode, Volume->FatPos + WriteCount, WriteCount, DirtyValue, NULL);\r |
270 | }\r | |
271 | \r | |
272 | /**\r | |
273 | Invoke a notification event\r | |
274 | \r | |
275 | @param Event Event whose notification function is being invoked.\r | |
276 | @param Context The pointer to the notification function's context,\r | |
277 | which is implementation-dependent.\r | |
278 | \r | |
279 | **/\r | |
280 | VOID\r | |
281 | EFIAPI\r | |
282 | FatOnAccessComplete (\r | |
283 | IN EFI_EVENT Event,\r | |
284 | IN VOID *Context\r | |
285 | )\r | |
286 | /*++\r | |
287 | \r | |
288 | Routine Description:\r | |
289 | \r | |
290 | Invoke a notification event\r | |
291 | case #1. some subtasks are not completed when the FatOpenEx checks the Task->Subtasks\r | |
292 | - sets Task->SubtaskCollected so callback to signal the event and free the task.\r | |
293 | case #2. all subtasks are completed when the FatOpenEx checks the Task->Subtasks\r | |
294 | - FatOpenEx signal the event and free the task.\r | |
295 | Arguments:\r | |
296 | \r | |
297 | Event - Event whose notification function is being invoked.\r | |
298 | Context - The pointer to the notification function's context,\r | |
299 | which is implementation-dependent.\r | |
300 | \r | |
301 | --*/\r | |
302 | {\r | |
303 | EFI_STATUS Status;\r | |
304 | FAT_SUBTASK *Subtask;\r | |
305 | FAT_TASK *Task;\r | |
306 | \r | |
307 | //\r | |
308 | // Avoid someone in future breaks the below assumption.\r | |
309 | //\r | |
310 | ASSERT (EfiGetCurrentTpl () == FatTaskLock.Tpl);\r | |
311 | \r | |
312 | Subtask = (FAT_SUBTASK *) Context;\r | |
313 | Task = Subtask->Task;\r | |
314 | Status = Subtask->DiskIo2Token.TransactionStatus;\r | |
315 | \r | |
316 | ASSERT (Task->Signature == FAT_TASK_SIGNATURE);\r | |
317 | ASSERT (Subtask->Signature == FAT_SUBTASK_SIGNATURE);\r | |
318 | \r | |
319 | //\r | |
320 | // Remove the task unconditionally\r | |
321 | //\r | |
322 | FatDestroySubtask (Subtask);\r | |
323 | \r | |
324 | //\r | |
325 | // Task->FileIoToken is NULL which means the task will be ignored (just recycle the subtask and task memory).\r | |
326 | //\r | |
327 | if (Task->FileIoToken != NULL) {\r | |
328 | if (IsListEmpty (&Task->Subtasks) || EFI_ERROR (Status)) {\r | |
329 | Task->FileIoToken->Status = Status;\r | |
330 | gBS->SignalEvent (Task->FileIoToken->Event);\r | |
331 | //\r | |
332 | // Mark Task->FileIoToken to NULL so that the subtasks belonging to the task will be ignored.\r | |
333 | //\r | |
334 | Task->FileIoToken = NULL;\r | |
335 | }\r | |
336 | }\r | |
337 | \r | |
338 | if (IsListEmpty (&Task->Subtasks)) {\r | |
339 | RemoveEntryList (&Task->Link);\r | |
340 | FreePool (Task);\r | |
341 | }\r | |
b9ec9330 QH |
342 | }\r |
343 | \r | |
344 | EFI_STATUS\r | |
345 | FatDiskIo (\r | |
346 | IN FAT_VOLUME *Volume,\r | |
347 | IN IO_MODE IoMode,\r | |
348 | IN UINT64 Offset,\r | |
349 | IN UINTN BufferSize,\r | |
149d6335 RN |
350 | IN OUT VOID *Buffer,\r |
351 | IN FAT_TASK *Task\r | |
b9ec9330 QH |
352 | )\r |
353 | /*++\r | |
354 | \r | |
355 | Routine Description:\r | |
356 | \r | |
357 | General disk access function\r | |
358 | \r | |
359 | Arguments:\r | |
360 | \r | |
361 | Volume - FAT file system volume.\r | |
362 | IoMode - The access mode (disk read/write or cache access).\r | |
363 | Offset - The starting byte offset to read from.\r | |
364 | BufferSize - Size of Buffer.\r | |
365 | Buffer - Buffer containing read data.\r | |
366 | \r | |
367 | Returns:\r | |
368 | \r | |
369 | EFI_SUCCESS - The operation is performed successfully.\r | |
370 | EFI_VOLUME_CORRUPTED - The accesss is\r | |
371 | Others - The status of read/write the disk\r | |
372 | \r | |
373 | --*/\r | |
374 | {\r | |
375 | EFI_STATUS Status;\r | |
376 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
377 | EFI_DISK_READ IoFunction;\r | |
149d6335 | 378 | FAT_SUBTASK *Subtask;\r |
b9ec9330 QH |
379 | \r |
380 | //\r | |
381 | // Verify the IO is in devices range\r | |
382 | //\r | |
383 | Status = EFI_VOLUME_CORRUPTED;\r | |
384 | if (Offset + BufferSize <= Volume->VolumeSize) {\r | |
385 | if (CACHE_ENABLED (IoMode)) {\r | |
386 | //\r | |
387 | // Access cache\r | |
388 | //\r | |
149d6335 | 389 | Status = FatAccessCache (Volume, CACHE_TYPE (IoMode), RAW_ACCESS (IoMode), Offset, BufferSize, Buffer, Task);\r |
b9ec9330 QH |
390 | } else {\r |
391 | //\r | |
392 | // Access disk directly\r | |
393 | //\r | |
149d6335 RN |
394 | if (Task == NULL) {\r |
395 | //\r | |
396 | // Blocking access\r | |
397 | //\r | |
398 | DiskIo = Volume->DiskIo;\r | |
399 | IoFunction = (IoMode == READ_DISK) ? DiskIo->ReadDisk : DiskIo->WriteDisk;\r | |
400 | Status = IoFunction (DiskIo, Volume->MediaId, Offset, BufferSize, Buffer);\r | |
401 | } else {\r | |
402 | //\r | |
403 | // Non-blocking access\r | |
404 | //\r | |
405 | Subtask = AllocateZeroPool (sizeof (*Subtask));\r | |
406 | if (Subtask == NULL) {\r | |
407 | Status = EFI_OUT_OF_RESOURCES;\r | |
408 | } else {\r | |
409 | Subtask->Signature = FAT_SUBTASK_SIGNATURE;\r | |
410 | Subtask->Task = Task;\r | |
411 | Subtask->Write = (BOOLEAN) (IoMode == WRITE_DISK);\r | |
412 | Subtask->Offset = Offset;\r | |
413 | Subtask->Buffer = Buffer;\r | |
414 | Subtask->BufferSize = BufferSize;\r | |
415 | Status = gBS->CreateEvent (\r | |
416 | EVT_NOTIFY_SIGNAL,\r | |
417 | TPL_NOTIFY,\r | |
418 | FatOnAccessComplete,\r | |
419 | Subtask,\r | |
420 | &Subtask->DiskIo2Token.Event\r | |
421 | );\r | |
422 | if (!EFI_ERROR (Status)) {\r | |
423 | InsertTailList (&Task->Subtasks, &Subtask->Link);\r | |
424 | } else {\r | |
425 | FreePool (Subtask);\r | |
426 | }\r | |
427 | }\r | |
428 | }\r | |
b9ec9330 QH |
429 | }\r |
430 | }\r | |
431 | \r | |
432 | if (EFI_ERROR (Status)) {\r | |
433 | Volume->DiskError = TRUE;\r | |
149d6335 | 434 | DEBUG ((EFI_D_ERROR, "FatDiskIo: error %r\n", Status));\r |
b9ec9330 QH |
435 | }\r |
436 | \r | |
437 | return Status;\r | |
438 | }\r | |
439 | \r | |
440 | VOID\r | |
441 | FatAcquireLock (\r | |
442 | VOID\r | |
443 | )\r | |
444 | /*++\r | |
445 | \r | |
446 | Routine Description:\r | |
447 | \r | |
448 | Lock the volume.\r | |
449 | \r | |
450 | Arguments:\r | |
451 | \r | |
452 | None.\r | |
453 | \r | |
454 | Returns:\r | |
455 | \r | |
456 | None.\r | |
457 | \r | |
458 | --*/\r | |
459 | {\r | |
460 | EfiAcquireLock (&FatFsLock);\r | |
461 | }\r | |
462 | \r | |
25ce9b1f QH |
463 | EFI_STATUS\r |
464 | FatAcquireLockOrFail (\r | |
b9ec9330 QH |
465 | VOID\r |
466 | )\r | |
467 | /*++\r | |
468 | \r | |
469 | Routine Description:\r | |
470 | \r | |
25ce9b1f QH |
471 | Lock the volume.\r |
472 | If the lock is already in the acquired state, then EFI_ACCESS_DENIED is returned.\r | |
473 | Otherwise, EFI_SUCCESS is returned.\r | |
b9ec9330 QH |
474 | \r |
475 | Arguments:\r | |
476 | \r | |
477 | None.\r | |
478 | \r | |
479 | Returns:\r | |
480 | \r | |
25ce9b1f QH |
481 | EFI_SUCCESS - The volume is locked.\r |
482 | EFI_ACCESS_DENIED - The volume could not be locked because it is already locked.\r | |
b9ec9330 QH |
483 | \r |
484 | --*/\r | |
485 | {\r | |
25ce9b1f | 486 | return EfiAcquireLockOrFail (&FatFsLock);\r |
b9ec9330 QH |
487 | }\r |
488 | \r | |
489 | VOID\r | |
490 | FatReleaseLock (\r | |
491 | VOID\r | |
492 | )\r | |
493 | /*++\r | |
494 | \r | |
495 | Routine Description:\r | |
496 | \r | |
497 | Unlock the volume.\r | |
498 | \r | |
499 | Arguments:\r | |
500 | \r | |
501 | Null.\r | |
502 | \r | |
503 | Returns:\r | |
504 | \r | |
505 | None.\r | |
506 | \r | |
507 | --*/\r | |
508 | {\r | |
509 | EfiReleaseLock (&FatFsLock);\r | |
510 | }\r | |
511 | \r | |
512 | VOID\r | |
513 | FatFreeDirEnt (\r | |
514 | IN FAT_DIRENT *DirEnt\r | |
515 | )\r | |
516 | /*++\r | |
517 | \r | |
518 | Routine Description:\r | |
519 | \r | |
520 | Free directory entry.\r | |
521 | \r | |
522 | Arguments:\r | |
523 | \r | |
524 | DirEnt - The directory entry to be freed.\r | |
525 | \r | |
526 | Returns:\r | |
527 | \r | |
528 | None.\r | |
529 | \r | |
530 | --*/\r | |
531 | {\r | |
532 | if (DirEnt->FileString != NULL) {\r | |
533 | FreePool (DirEnt->FileString);\r | |
534 | }\r | |
535 | \r | |
536 | FreePool (DirEnt);\r | |
537 | }\r | |
538 | \r | |
539 | VOID\r | |
540 | FatFreeVolume (\r | |
541 | IN FAT_VOLUME *Volume\r | |
542 | )\r | |
543 | /*++\r | |
544 | \r | |
545 | Routine Description:\r | |
546 | \r | |
547 | Free volume structure (including the contents of directory cache and disk cache).\r | |
548 | \r | |
549 | Arguments:\r | |
550 | \r | |
551 | Volume - The volume structure to be freed.\r | |
552 | \r | |
553 | Returns:\r | |
554 | \r | |
555 | None.\r | |
556 | \r | |
557 | --*/\r | |
558 | {\r | |
559 | //\r | |
560 | // Free disk cache\r | |
561 | //\r | |
562 | if (Volume->CacheBuffer != NULL) {\r | |
563 | FreePool (Volume->CacheBuffer);\r | |
564 | }\r | |
565 | //\r | |
566 | // Free directory cache\r | |
567 | //\r | |
568 | FatCleanupODirCache (Volume);\r | |
569 | FreePool (Volume);\r | |
570 | }\r | |
571 | \r | |
572 | VOID\r | |
573 | FatEfiTimeToFatTime (\r | |
574 | IN EFI_TIME *ETime,\r | |
575 | OUT FAT_DATE_TIME *FTime\r | |
576 | )\r | |
577 | /*++\r | |
578 | \r | |
579 | Routine Description:\r | |
580 | \r | |
581 | Translate EFI time to FAT time.\r | |
582 | \r | |
583 | Arguments:\r | |
584 | \r | |
585 | ETime - The time of EFI_TIME.\r | |
586 | FTime - The time of FAT_DATE_TIME.\r | |
587 | \r | |
588 | Returns:\r | |
589 | \r | |
590 | None.\r | |
591 | \r | |
592 | --*/\r | |
593 | {\r | |
594 | //\r | |
595 | // ignores timezone info in source ETime\r | |
596 | //\r | |
597 | if (ETime->Year > 1980) {\r | |
598 | FTime->Date.Year = (UINT16) (ETime->Year - 1980);\r | |
599 | }\r | |
600 | \r | |
601 | if (ETime->Year >= 1980 + FAT_MAX_YEAR_FROM_1980) {\r | |
602 | FTime->Date.Year = FAT_MAX_YEAR_FROM_1980;\r | |
603 | }\r | |
604 | \r | |
605 | FTime->Date.Month = ETime->Month;\r | |
606 | FTime->Date.Day = ETime->Day;\r | |
607 | FTime->Time.Hour = ETime->Hour;\r | |
608 | FTime->Time.Minute = ETime->Minute;\r | |
609 | FTime->Time.DoubleSecond = (UINT16) (ETime->Second / 2);\r | |
610 | }\r | |
611 | \r | |
612 | VOID\r | |
613 | FatFatTimeToEfiTime (\r | |
614 | IN FAT_DATE_TIME *FTime,\r | |
615 | OUT EFI_TIME *ETime\r | |
616 | )\r | |
617 | /*++\r | |
618 | \r | |
619 | Routine Description:\r | |
620 | \r | |
621 | Translate Fat time to EFI time.\r | |
622 | \r | |
623 | Arguments:\r | |
624 | \r | |
625 | FTime - The time of FAT_DATE_TIME.\r | |
626 | ETime - The time of EFI_TIME.\r | |
627 | \r | |
628 | Returns:\r | |
629 | \r | |
630 | None.\r | |
631 | \r | |
632 | --*/\r | |
633 | {\r | |
634 | ETime->Year = (UINT16) (FTime->Date.Year + 1980);\r | |
635 | ETime->Month = (UINT8) FTime->Date.Month;\r | |
636 | ETime->Day = (UINT8) FTime->Date.Day;\r | |
637 | ETime->Hour = (UINT8) FTime->Time.Hour;\r | |
638 | ETime->Minute = (UINT8) FTime->Time.Minute;\r | |
639 | ETime->Second = (UINT8) (FTime->Time.DoubleSecond * 2);\r | |
640 | ETime->Nanosecond = 0;\r | |
641 | ETime->TimeZone = EFI_UNSPECIFIED_TIMEZONE;\r | |
642 | ETime->Daylight = 0;\r | |
643 | }\r | |
644 | \r | |
645 | VOID\r | |
646 | FatGetCurrentFatTime (\r | |
647 | OUT FAT_DATE_TIME *FatNow\r | |
648 | )\r | |
649 | /*++\r | |
650 | \r | |
651 | Routine Description:\r | |
652 | \r | |
653 | Get Current FAT time.\r | |
654 | \r | |
655 | Arguments:\r | |
656 | \r | |
657 | FatNow - Current FAT time.\r | |
658 | \r | |
659 | Returns:\r | |
660 | \r | |
661 | None.\r | |
662 | \r | |
663 | --*/\r | |
664 | {\r | |
ab99061c OM |
665 | EFI_STATUS Status;\r |
666 | EFI_TIME Now;\r | |
667 | \r | |
668 | Status = gRT->GetTime (&Now, NULL);\r | |
669 | if (!EFI_ERROR (Status)) {\r | |
670 | FatEfiTimeToFatTime (&Now, FatNow);\r | |
671 | } else {\r | |
672 | ZeroMem (&Now, sizeof (EFI_TIME));\r | |
673 | Now.Year = 1980;\r | |
674 | Now.Month = 1;\r | |
675 | Now.Day = 1;\r | |
676 | FatEfiTimeToFatTime (&Now, FatNow);\r | |
677 | }\r | |
b9ec9330 QH |
678 | }\r |
679 | \r | |
680 | BOOLEAN\r | |
681 | FatIsValidTime (\r | |
682 | IN EFI_TIME *Time\r | |
683 | )\r | |
684 | /*++\r | |
685 | \r | |
686 | Routine Description:\r | |
687 | \r | |
688 | Check whether a time is valid.\r | |
689 | \r | |
690 | Arguments:\r | |
691 | \r | |
692 | Time - The time of EFI_TIME.\r | |
693 | \r | |
694 | Returns:\r | |
695 | \r | |
696 | TRUE - The time is valid.\r | |
697 | FALSE - The time is not valid.\r | |
698 | \r | |
699 | --*/\r | |
700 | {\r | |
701 | static UINT8 MonthDays[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };\r | |
702 | UINTN Day;\r | |
703 | BOOLEAN ValidTime;\r | |
704 | \r | |
705 | ValidTime = TRUE;\r | |
706 | \r | |
707 | //\r | |
708 | // Check the fields for range problems\r | |
709 | // Fat can only support from 1980\r | |
710 | //\r | |
711 | if (Time->Year < 1980 ||\r | |
712 | Time->Month < 1 ||\r | |
713 | Time->Month > 12 ||\r | |
714 | Time->Day < 1 ||\r | |
715 | Time->Day > 31 ||\r | |
716 | Time->Hour > 23 ||\r | |
717 | Time->Minute > 59 ||\r | |
718 | Time->Second > 59 ||\r | |
719 | Time->Nanosecond > 999999999\r | |
720 | ) {\r | |
721 | \r | |
722 | ValidTime = FALSE;\r | |
723 | \r | |
724 | } else {\r | |
725 | //\r | |
726 | // Perform a more specific check of the day of the month\r | |
727 | //\r | |
728 | Day = MonthDays[Time->Month - 1];\r | |
729 | if (Time->Month == 2 && IS_LEAP_YEAR (Time->Year)) {\r | |
730 | Day += 1;\r | |
731 | //\r | |
732 | // 1 extra day this month\r | |
733 | //\r | |
734 | }\r | |
735 | if (Time->Day > Day) {\r | |
736 | ValidTime = FALSE;\r | |
737 | }\r | |
738 | }\r | |
739 | \r | |
740 | return ValidTime;\r | |
741 | }\r |