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cae7420b DB |
1 | /** @file\r |
2 | Miscellaneous functions.\r | |
b9ec9330 | 3 | \r |
149d6335 | 4 | Copyright (c) 2005 - 2013, Intel Corporation. All rights reserved.<BR>\r |
6163cc98 | 5 | This program and the accompanying materials are licensed and made available\r |
b9ec9330 QH |
6 | under the terms and conditions of the BSD License which accompanies this\r |
7 | distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | \r | |
cae7420b | 14 | **/\r |
b9ec9330 | 15 | \r |
cae7420b DB |
16 | #include "Fat.h"\r |
17 | UINT8 mMonthDays[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };\r | |
b9ec9330 | 18 | \r |
cae7420b | 19 | /**\r |
b9ec9330 | 20 | \r |
cae7420b | 21 | Create the task\r |
b9ec9330 | 22 | \r |
cae7420b DB |
23 | @param IFile - The instance of the open file.\r |
24 | @param Token - A pointer to the token associated with the transaction.\r | |
b9ec9330 | 25 | \r |
cae7420b | 26 | @return FAT_TASK * - Return the task instance.\r |
b9ec9330 | 27 | \r |
cae7420b | 28 | **/\r |
149d6335 RN |
29 | FAT_TASK *\r |
30 | FatCreateTask (\r | |
31 | FAT_IFILE *IFile,\r | |
32 | EFI_FILE_IO_TOKEN *Token\r | |
33 | )\r | |
149d6335 RN |
34 | {\r |
35 | FAT_TASK *Task;\r | |
36 | \r | |
37 | Task = AllocateZeroPool (sizeof (*Task));\r | |
38 | if (Task != NULL) {\r | |
39 | Task->Signature = FAT_TASK_SIGNATURE;\r | |
40 | Task->IFile = IFile;\r | |
41 | Task->FileIoToken = Token;\r | |
42 | InitializeListHead (&Task->Subtasks);\r | |
43 | InitializeListHead (&Task->Link);\r | |
44 | }\r | |
45 | return Task;\r | |
46 | }\r | |
47 | \r | |
cae7420b | 48 | /**\r |
149d6335 | 49 | \r |
cae7420b | 50 | Destroy the task.\r |
149d6335 | 51 | \r |
cae7420b | 52 | @param Task - The task to be destroyed.\r |
149d6335 | 53 | \r |
149d6335 | 54 | **/\r |
cae7420b DB |
55 | VOID\r |
56 | FatDestroyTask (\r | |
57 | FAT_TASK *Task\r | |
58 | )\r | |
149d6335 RN |
59 | {\r |
60 | LIST_ENTRY *Link;\r | |
61 | FAT_SUBTASK *Subtask;\r | |
62 | \r | |
63 | Link = GetFirstNode (&Task->Subtasks);\r | |
64 | while (!IsNull (&Task->Subtasks, Link)) {\r | |
65 | Subtask = CR (Link, FAT_SUBTASK, Link, FAT_SUBTASK_SIGNATURE);\r | |
66 | Link = FatDestroySubtask (Subtask);\r | |
67 | }\r | |
149d6335 RN |
68 | FreePool (Task);\r |
69 | }\r | |
70 | \r | |
cae7420b | 71 | /**\r |
149d6335 RN |
72 | \r |
73 | Wait all non-blocking requests complete.\r | |
74 | \r | |
cae7420b | 75 | @param IFile - The instance of the open file.\r |
149d6335 | 76 | \r |
149d6335 | 77 | **/\r |
cae7420b DB |
78 | VOID\r |
79 | FatWaitNonblockingTask (\r | |
80 | FAT_IFILE *IFile\r | |
81 | )\r | |
149d6335 RN |
82 | {\r |
83 | BOOLEAN TaskQueueEmpty;\r | |
84 | \r | |
85 | do {\r | |
86 | EfiAcquireLock (&FatTaskLock);\r | |
87 | TaskQueueEmpty = IsListEmpty (&IFile->Tasks);\r | |
88 | EfiReleaseLock (&FatTaskLock);\r | |
89 | } while (!TaskQueueEmpty);\r | |
90 | }\r | |
91 | \r | |
cae7420b | 92 | /**\r |
149d6335 RN |
93 | \r |
94 | Remove the subtask from subtask list.\r | |
95 | \r | |
cae7420b | 96 | @param Subtask - The subtask to be removed.\r |
149d6335 | 97 | \r |
cae7420b | 98 | @return LIST_ENTRY * - The next node in the list.\r |
149d6335 | 99 | \r |
cae7420b DB |
100 | **/\r |
101 | LIST_ENTRY *\r | |
102 | FatDestroySubtask (\r | |
103 | FAT_SUBTASK *Subtask\r | |
104 | )\r | |
149d6335 RN |
105 | {\r |
106 | LIST_ENTRY *Link;\r | |
107 | \r | |
108 | gBS->CloseEvent (Subtask->DiskIo2Token.Event);\r | |
109 | \r | |
110 | Link = RemoveEntryList (&Subtask->Link);\r | |
111 | FreePool (Subtask);\r | |
112 | \r | |
113 | return Link;\r | |
114 | }\r | |
115 | \r | |
cae7420b DB |
116 | /**\r |
117 | \r | |
118 | Execute the task.\r | |
119 | \r | |
120 | @param IFile - The instance of the open file.\r | |
121 | @param Task - The task to be executed.\r | |
122 | \r | |
123 | @retval EFI_SUCCESS - The task was executed sucessfully.\r | |
124 | @return other - An error occurred when executing the task.\r | |
125 | \r | |
126 | **/\r | |
149d6335 RN |
127 | EFI_STATUS\r |
128 | FatQueueTask (\r | |
129 | IN FAT_IFILE *IFile,\r | |
130 | IN FAT_TASK *Task\r | |
131 | )\r | |
149d6335 RN |
132 | {\r |
133 | EFI_STATUS Status;\r | |
134 | LIST_ENTRY *Link;\r | |
135 | FAT_SUBTASK *Subtask;\r | |
136 | \r | |
137 | //\r | |
138 | // Sometimes the Task doesn't contain any subtasks, signal the event directly.\r | |
139 | //\r | |
140 | if (IsListEmpty (&Task->Subtasks)) {\r | |
141 | Task->FileIoToken->Status = EFI_SUCCESS;\r | |
142 | gBS->SignalEvent (Task->FileIoToken->Event);\r | |
143 | FreePool (Task);\r | |
144 | return EFI_SUCCESS;\r | |
145 | }\r | |
146 | \r | |
147 | EfiAcquireLock (&FatTaskLock);\r | |
148 | InsertTailList (&IFile->Tasks, &Task->Link);\r | |
149 | EfiReleaseLock (&FatTaskLock);\r | |
150 | \r | |
151 | Status = EFI_SUCCESS;\r | |
152 | for ( Link = GetFirstNode (&Task->Subtasks)\r | |
153 | ; !IsNull (&Task->Subtasks, Link)\r | |
154 | ; Link = GetNextNode (&Task->Subtasks, Link)\r | |
155 | ) {\r | |
156 | Subtask = CR (Link, FAT_SUBTASK, Link, FAT_SUBTASK_SIGNATURE);\r | |
157 | if (Subtask->Write) {\r | |
158 | \r | |
159 | Status = IFile->OFile->Volume->DiskIo2->WriteDiskEx (\r | |
160 | IFile->OFile->Volume->DiskIo2,\r | |
161 | IFile->OFile->Volume->MediaId,\r | |
162 | Subtask->Offset,\r | |
163 | &Subtask->DiskIo2Token,\r | |
164 | Subtask->BufferSize,\r | |
165 | Subtask->Buffer\r | |
166 | );\r | |
167 | } else {\r | |
168 | Status = IFile->OFile->Volume->DiskIo2->ReadDiskEx (\r | |
169 | IFile->OFile->Volume->DiskIo2,\r | |
170 | IFile->OFile->Volume->MediaId,\r | |
171 | Subtask->Offset,\r | |
172 | &Subtask->DiskIo2Token,\r | |
173 | Subtask->BufferSize,\r | |
174 | Subtask->Buffer\r | |
175 | );\r | |
176 | }\r | |
177 | if (EFI_ERROR (Status)) {\r | |
178 | break;\r | |
179 | }\r | |
180 | }\r | |
181 | \r | |
182 | if (EFI_ERROR (Status)) {\r | |
183 | EfiAcquireLock (&FatTaskLock);\r | |
184 | //\r | |
185 | // Remove all the remaining subtasks when failure.\r | |
186 | // We shouldn't remove all the tasks because the non-blocking requests have\r | |
187 | // been submitted and cannot be canceled.\r | |
188 | //\r | |
189 | while (!IsNull (&Task->Subtasks, Link)) {\r | |
190 | Subtask = CR (Link, FAT_SUBTASK, Link, FAT_SUBTASK_SIGNATURE);\r | |
191 | Link = FatDestroySubtask (Subtask);\r | |
192 | }\r | |
193 | \r | |
194 | if (IsListEmpty (&Task->Subtasks)) {\r | |
195 | RemoveEntryList (&Task->Link);\r | |
196 | FreePool (Task);\r | |
197 | } else {\r | |
198 | //\r | |
199 | // If one or more subtasks have been already submitted, set FileIoToken\r | |
200 | // to NULL so that the callback won't signal the event.\r | |
201 | //\r | |
202 | Task->FileIoToken = NULL;\r | |
203 | }\r | |
204 | \r | |
205 | EfiReleaseLock (&FatTaskLock);\r | |
206 | }\r | |
207 | \r | |
208 | return Status;\r | |
209 | }\r | |
210 | \r | |
cae7420b DB |
211 | /**\r |
212 | \r | |
213 | Set the volume as dirty or not.\r | |
214 | \r | |
215 | @param Volume - FAT file system volume.\r | |
216 | @param IoMode - The access mode.\r | |
217 | @param DirtyValue - Set the volume as dirty or not.\r | |
218 | \r | |
219 | @retval EFI_SUCCESS - Set the new FAT entry value sucessfully.\r | |
220 | @return other - An error occurred when operation the FAT entries.\r | |
221 | \r | |
222 | **/\r | |
b9ec9330 QH |
223 | EFI_STATUS\r |
224 | FatAccessVolumeDirty (\r | |
225 | IN FAT_VOLUME *Volume,\r | |
226 | IN IO_MODE IoMode,\r | |
227 | IN VOID *DirtyValue\r | |
228 | )\r | |
b9ec9330 QH |
229 | {\r |
230 | UINTN WriteCount;\r | |
231 | \r | |
232 | WriteCount = Volume->FatEntrySize;\r | |
149d6335 RN |
233 | return FatDiskIo (Volume, IoMode, Volume->FatPos + WriteCount, WriteCount, DirtyValue, NULL);\r |
234 | }\r | |
235 | \r | |
236 | /**\r | |
cae7420b | 237 | Invoke a notification event.\r |
149d6335 RN |
238 | \r |
239 | @param Event Event whose notification function is being invoked.\r | |
240 | @param Context The pointer to the notification function's context,\r | |
241 | which is implementation-dependent.\r | |
242 | \r | |
243 | **/\r | |
244 | VOID\r | |
245 | EFIAPI\r | |
246 | FatOnAccessComplete (\r | |
247 | IN EFI_EVENT Event,\r | |
248 | IN VOID *Context\r | |
249 | )\r | |
149d6335 RN |
250 | {\r |
251 | EFI_STATUS Status;\r | |
252 | FAT_SUBTASK *Subtask;\r | |
253 | FAT_TASK *Task;\r | |
254 | \r | |
255 | //\r | |
256 | // Avoid someone in future breaks the below assumption.\r | |
257 | //\r | |
258 | ASSERT (EfiGetCurrentTpl () == FatTaskLock.Tpl);\r | |
259 | \r | |
260 | Subtask = (FAT_SUBTASK *) Context;\r | |
261 | Task = Subtask->Task;\r | |
262 | Status = Subtask->DiskIo2Token.TransactionStatus;\r | |
263 | \r | |
264 | ASSERT (Task->Signature == FAT_TASK_SIGNATURE);\r | |
265 | ASSERT (Subtask->Signature == FAT_SUBTASK_SIGNATURE);\r | |
266 | \r | |
267 | //\r | |
268 | // Remove the task unconditionally\r | |
269 | //\r | |
270 | FatDestroySubtask (Subtask);\r | |
271 | \r | |
272 | //\r | |
273 | // Task->FileIoToken is NULL which means the task will be ignored (just recycle the subtask and task memory).\r | |
274 | //\r | |
275 | if (Task->FileIoToken != NULL) {\r | |
276 | if (IsListEmpty (&Task->Subtasks) || EFI_ERROR (Status)) {\r | |
277 | Task->FileIoToken->Status = Status;\r | |
278 | gBS->SignalEvent (Task->FileIoToken->Event);\r | |
279 | //\r | |
280 | // Mark Task->FileIoToken to NULL so that the subtasks belonging to the task will be ignored.\r | |
281 | //\r | |
282 | Task->FileIoToken = NULL;\r | |
283 | }\r | |
284 | }\r | |
285 | \r | |
286 | if (IsListEmpty (&Task->Subtasks)) {\r | |
287 | RemoveEntryList (&Task->Link);\r | |
288 | FreePool (Task);\r | |
289 | }\r | |
b9ec9330 QH |
290 | }\r |
291 | \r | |
cae7420b DB |
292 | /**\r |
293 | \r | |
294 | General disk access function.\r | |
295 | \r | |
296 | @param Volume - FAT file system volume.\r | |
297 | @param IoMode - The access mode (disk read/write or cache access).\r | |
298 | @param Offset - The starting byte offset to read from.\r | |
299 | @param BufferSize - Size of Buffer.\r | |
300 | @param Buffer - Buffer containing read data.\r | |
301 | @param Task point to task instance.\r | |
302 | \r | |
303 | @retval EFI_SUCCESS - The operation is performed successfully.\r | |
304 | @retval EFI_VOLUME_CORRUPTED - The accesss is\r | |
305 | @return Others - The status of read/write the disk\r | |
306 | \r | |
307 | **/\r | |
b9ec9330 QH |
308 | EFI_STATUS\r |
309 | FatDiskIo (\r | |
310 | IN FAT_VOLUME *Volume,\r | |
311 | IN IO_MODE IoMode,\r | |
312 | IN UINT64 Offset,\r | |
313 | IN UINTN BufferSize,\r | |
149d6335 RN |
314 | IN OUT VOID *Buffer,\r |
315 | IN FAT_TASK *Task\r | |
b9ec9330 | 316 | )\r |
b9ec9330 QH |
317 | {\r |
318 | EFI_STATUS Status;\r | |
319 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
320 | EFI_DISK_READ IoFunction;\r | |
149d6335 | 321 | FAT_SUBTASK *Subtask;\r |
b9ec9330 QH |
322 | \r |
323 | //\r | |
324 | // Verify the IO is in devices range\r | |
325 | //\r | |
326 | Status = EFI_VOLUME_CORRUPTED;\r | |
327 | if (Offset + BufferSize <= Volume->VolumeSize) {\r | |
328 | if (CACHE_ENABLED (IoMode)) {\r | |
329 | //\r | |
330 | // Access cache\r | |
331 | //\r | |
149d6335 | 332 | Status = FatAccessCache (Volume, CACHE_TYPE (IoMode), RAW_ACCESS (IoMode), Offset, BufferSize, Buffer, Task);\r |
b9ec9330 QH |
333 | } else {\r |
334 | //\r | |
335 | // Access disk directly\r | |
336 | //\r | |
149d6335 RN |
337 | if (Task == NULL) {\r |
338 | //\r | |
339 | // Blocking access\r | |
340 | //\r | |
341 | DiskIo = Volume->DiskIo;\r | |
c1680e88 | 342 | IoFunction = (IoMode == ReadDisk) ? DiskIo->ReadDisk : DiskIo->WriteDisk;\r |
149d6335 RN |
343 | Status = IoFunction (DiskIo, Volume->MediaId, Offset, BufferSize, Buffer);\r |
344 | } else {\r | |
345 | //\r | |
346 | // Non-blocking access\r | |
347 | //\r | |
348 | Subtask = AllocateZeroPool (sizeof (*Subtask));\r | |
349 | if (Subtask == NULL) {\r | |
350 | Status = EFI_OUT_OF_RESOURCES;\r | |
351 | } else {\r | |
352 | Subtask->Signature = FAT_SUBTASK_SIGNATURE;\r | |
353 | Subtask->Task = Task;\r | |
c1680e88 | 354 | Subtask->Write = (BOOLEAN) (IoMode == WriteDisk);\r |
149d6335 RN |
355 | Subtask->Offset = Offset;\r |
356 | Subtask->Buffer = Buffer;\r | |
357 | Subtask->BufferSize = BufferSize;\r | |
358 | Status = gBS->CreateEvent (\r | |
359 | EVT_NOTIFY_SIGNAL,\r | |
360 | TPL_NOTIFY,\r | |
361 | FatOnAccessComplete,\r | |
362 | Subtask,\r | |
363 | &Subtask->DiskIo2Token.Event\r | |
364 | );\r | |
365 | if (!EFI_ERROR (Status)) {\r | |
366 | InsertTailList (&Task->Subtasks, &Subtask->Link);\r | |
367 | } else {\r | |
368 | FreePool (Subtask);\r | |
369 | }\r | |
370 | }\r | |
371 | }\r | |
b9ec9330 QH |
372 | }\r |
373 | }\r | |
374 | \r | |
375 | if (EFI_ERROR (Status)) {\r | |
376 | Volume->DiskError = TRUE;\r | |
149d6335 | 377 | DEBUG ((EFI_D_ERROR, "FatDiskIo: error %r\n", Status));\r |
b9ec9330 QH |
378 | }\r |
379 | \r | |
380 | return Status;\r | |
381 | }\r | |
382 | \r | |
cae7420b DB |
383 | /**\r |
384 | \r | |
385 | Lock the volume.\r | |
386 | \r | |
387 | **/\r | |
b9ec9330 QH |
388 | VOID\r |
389 | FatAcquireLock (\r | |
390 | VOID\r | |
391 | )\r | |
b9ec9330 QH |
392 | {\r |
393 | EfiAcquireLock (&FatFsLock);\r | |
394 | }\r | |
395 | \r | |
cae7420b | 396 | /**\r |
b9ec9330 | 397 | \r |
25ce9b1f QH |
398 | Lock the volume.\r |
399 | If the lock is already in the acquired state, then EFI_ACCESS_DENIED is returned.\r | |
400 | Otherwise, EFI_SUCCESS is returned.\r | |
b9ec9330 | 401 | \r |
cae7420b DB |
402 | @retval EFI_SUCCESS - The volume is locked.\r |
403 | @retval EFI_ACCESS_DENIED - The volume could not be locked because it is already locked.\r | |
b9ec9330 | 404 | \r |
cae7420b DB |
405 | **/\r |
406 | EFI_STATUS\r | |
407 | FatAcquireLockOrFail (\r | |
408 | VOID\r | |
409 | )\r | |
b9ec9330 | 410 | {\r |
25ce9b1f | 411 | return EfiAcquireLockOrFail (&FatFsLock);\r |
b9ec9330 QH |
412 | }\r |
413 | \r | |
cae7420b DB |
414 | /**\r |
415 | \r | |
416 | Unlock the volume.\r | |
417 | \r | |
418 | **/\r | |
b9ec9330 QH |
419 | VOID\r |
420 | FatReleaseLock (\r | |
421 | VOID\r | |
422 | )\r | |
b9ec9330 QH |
423 | {\r |
424 | EfiReleaseLock (&FatFsLock);\r | |
425 | }\r | |
426 | \r | |
cae7420b | 427 | /**\r |
b9ec9330 QH |
428 | \r |
429 | Free directory entry.\r | |
430 | \r | |
cae7420b | 431 | @param DirEnt - The directory entry to be freed.\r |
b9ec9330 | 432 | \r |
cae7420b DB |
433 | **/\r |
434 | VOID\r | |
435 | FatFreeDirEnt (\r | |
436 | IN FAT_DIRENT *DirEnt\r | |
437 | )\r | |
b9ec9330 QH |
438 | {\r |
439 | if (DirEnt->FileString != NULL) {\r | |
440 | FreePool (DirEnt->FileString);\r | |
441 | }\r | |
442 | \r | |
443 | FreePool (DirEnt);\r | |
444 | }\r | |
445 | \r | |
cae7420b | 446 | /**\r |
b9ec9330 QH |
447 | \r |
448 | Free volume structure (including the contents of directory cache and disk cache).\r | |
449 | \r | |
cae7420b | 450 | @param Volume - The volume structure to be freed.\r |
b9ec9330 | 451 | \r |
cae7420b DB |
452 | **/\r |
453 | VOID\r | |
454 | FatFreeVolume (\r | |
455 | IN FAT_VOLUME *Volume\r | |
456 | )\r | |
b9ec9330 QH |
457 | {\r |
458 | //\r | |
459 | // Free disk cache\r | |
460 | //\r | |
461 | if (Volume->CacheBuffer != NULL) {\r | |
462 | FreePool (Volume->CacheBuffer);\r | |
463 | }\r | |
464 | //\r | |
465 | // Free directory cache\r | |
466 | //\r | |
467 | FatCleanupODirCache (Volume);\r | |
468 | FreePool (Volume);\r | |
469 | }\r | |
470 | \r | |
cae7420b DB |
471 | /**\r |
472 | \r | |
473 | Translate EFI time to FAT time.\r | |
474 | \r | |
475 | @param ETime - The time of EFI_TIME.\r | |
476 | @param FTime - The time of FAT_DATE_TIME.\r | |
477 | \r | |
478 | **/\r | |
b9ec9330 QH |
479 | VOID\r |
480 | FatEfiTimeToFatTime (\r | |
481 | IN EFI_TIME *ETime,\r | |
482 | OUT FAT_DATE_TIME *FTime\r | |
483 | )\r | |
b9ec9330 QH |
484 | {\r |
485 | //\r | |
486 | // ignores timezone info in source ETime\r | |
487 | //\r | |
488 | if (ETime->Year > 1980) {\r | |
489 | FTime->Date.Year = (UINT16) (ETime->Year - 1980);\r | |
490 | }\r | |
491 | \r | |
492 | if (ETime->Year >= 1980 + FAT_MAX_YEAR_FROM_1980) {\r | |
493 | FTime->Date.Year = FAT_MAX_YEAR_FROM_1980;\r | |
494 | }\r | |
495 | \r | |
496 | FTime->Date.Month = ETime->Month;\r | |
497 | FTime->Date.Day = ETime->Day;\r | |
498 | FTime->Time.Hour = ETime->Hour;\r | |
499 | FTime->Time.Minute = ETime->Minute;\r | |
500 | FTime->Time.DoubleSecond = (UINT16) (ETime->Second / 2);\r | |
501 | }\r | |
502 | \r | |
cae7420b DB |
503 | /**\r |
504 | \r | |
505 | Translate Fat time to EFI time.\r | |
506 | \r | |
507 | @param FTime - The time of FAT_DATE_TIME.\r | |
508 | @param ETime - The time of EFI_TIME..\r | |
509 | \r | |
510 | **/\r | |
b9ec9330 QH |
511 | VOID\r |
512 | FatFatTimeToEfiTime (\r | |
513 | IN FAT_DATE_TIME *FTime,\r | |
514 | OUT EFI_TIME *ETime\r | |
515 | )\r | |
b9ec9330 QH |
516 | {\r |
517 | ETime->Year = (UINT16) (FTime->Date.Year + 1980);\r | |
518 | ETime->Month = (UINT8) FTime->Date.Month;\r | |
519 | ETime->Day = (UINT8) FTime->Date.Day;\r | |
520 | ETime->Hour = (UINT8) FTime->Time.Hour;\r | |
521 | ETime->Minute = (UINT8) FTime->Time.Minute;\r | |
522 | ETime->Second = (UINT8) (FTime->Time.DoubleSecond * 2);\r | |
523 | ETime->Nanosecond = 0;\r | |
524 | ETime->TimeZone = EFI_UNSPECIFIED_TIMEZONE;\r | |
525 | ETime->Daylight = 0;\r | |
526 | }\r | |
527 | \r | |
cae7420b | 528 | /**\r |
b9ec9330 QH |
529 | \r |
530 | Get Current FAT time.\r | |
531 | \r | |
cae7420b | 532 | @param FatNow - Current FAT time.\r |
b9ec9330 | 533 | \r |
cae7420b DB |
534 | **/\r |
535 | VOID\r | |
536 | FatGetCurrentFatTime (\r | |
537 | OUT FAT_DATE_TIME *FatNow\r | |
538 | )\r | |
b9ec9330 | 539 | {\r |
ab99061c OM |
540 | EFI_STATUS Status;\r |
541 | EFI_TIME Now;\r | |
542 | \r | |
543 | Status = gRT->GetTime (&Now, NULL);\r | |
544 | if (!EFI_ERROR (Status)) {\r | |
545 | FatEfiTimeToFatTime (&Now, FatNow);\r | |
546 | } else {\r | |
547 | ZeroMem (&Now, sizeof (EFI_TIME));\r | |
548 | Now.Year = 1980;\r | |
549 | Now.Month = 1;\r | |
550 | Now.Day = 1;\r | |
551 | FatEfiTimeToFatTime (&Now, FatNow);\r | |
552 | }\r | |
b9ec9330 QH |
553 | }\r |
554 | \r | |
cae7420b | 555 | /**\r |
b9ec9330 QH |
556 | \r |
557 | Check whether a time is valid.\r | |
558 | \r | |
cae7420b | 559 | @param Time - The time of EFI_TIME.\r |
b9ec9330 | 560 | \r |
cae7420b DB |
561 | @retval TRUE - The time is valid.\r |
562 | @retval FALSE - The time is not valid.\r | |
b9ec9330 | 563 | \r |
cae7420b DB |
564 | **/\r |
565 | BOOLEAN\r | |
566 | FatIsValidTime (\r | |
567 | IN EFI_TIME *Time\r | |
568 | )\r | |
b9ec9330 | 569 | {\r |
b9ec9330 QH |
570 | UINTN Day;\r |
571 | BOOLEAN ValidTime;\r | |
572 | \r | |
573 | ValidTime = TRUE;\r | |
574 | \r | |
575 | //\r | |
576 | // Check the fields for range problems\r | |
577 | // Fat can only support from 1980\r | |
578 | //\r | |
579 | if (Time->Year < 1980 ||\r | |
580 | Time->Month < 1 ||\r | |
581 | Time->Month > 12 ||\r | |
582 | Time->Day < 1 ||\r | |
583 | Time->Day > 31 ||\r | |
584 | Time->Hour > 23 ||\r | |
585 | Time->Minute > 59 ||\r | |
586 | Time->Second > 59 ||\r | |
587 | Time->Nanosecond > 999999999\r | |
588 | ) {\r | |
589 | \r | |
590 | ValidTime = FALSE;\r | |
591 | \r | |
592 | } else {\r | |
593 | //\r | |
594 | // Perform a more specific check of the day of the month\r | |
595 | //\r | |
3c8b45c8 | 596 | Day = mMonthDays[Time->Month - 1];\r |
b9ec9330 QH |
597 | if (Time->Month == 2 && IS_LEAP_YEAR (Time->Year)) {\r |
598 | Day += 1;\r | |
599 | //\r | |
600 | // 1 extra day this month\r | |
601 | //\r | |
602 | }\r | |
603 | if (Time->Day > Day) {\r | |
604 | ValidTime = FALSE;\r | |
605 | }\r | |
606 | }\r | |
607 | \r | |
608 | return ValidTime;\r | |
609 | }\r |