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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 | DirectoryManage.c\r | |
16 | \r | |
17 | Abstract:\r | |
18 | \r | |
19 | Functions for performing directory entry io\r | |
20 | \r | |
21 | Revision History\r | |
22 | \r | |
23 | --*/\r | |
24 | \r | |
25 | #include "Fat.h"\r | |
26 | \r | |
27 | STATIC\r | |
28 | EFI_STATUS\r | |
29 | FatAccessEntry (\r | |
30 | IN FAT_OFILE *Parent,\r | |
31 | IN IO_MODE IoMode,\r | |
32 | IN UINTN EntryPos,\r | |
33 | IN OUT VOID *Entry\r | |
34 | )\r | |
35 | /*++\r | |
36 | \r | |
37 | Routine Description:\r | |
38 | \r | |
39 | Get a directory entry from disk for the Ofile.\r | |
40 | \r | |
41 | Arguments:\r | |
42 | \r | |
43 | Parent - The parent of the OFile which need to update.\r | |
44 | IoMode - Indicate whether to read directory entry or write directroy entry.\r | |
45 | EntryPos - The position of the directory entry to be accessed.\r | |
46 | Entry - The directory entry read or written.\r | |
47 | \r | |
48 | Returns:\r | |
49 | \r | |
50 | EFI_SUCCESS - Access the directory entry sucessfully.\r | |
51 | other - An error occurred when reading the directory entry.\r | |
52 | \r | |
53 | --*/\r | |
54 | {\r | |
55 | UINTN Position;\r | |
56 | UINTN BufferSize;\r | |
57 | \r | |
58 | Position = EntryPos * sizeof (FAT_DIRECTORY_ENTRY);\r | |
59 | if (Position >= Parent->FileSize) {\r | |
60 | //\r | |
61 | // End of directory\r | |
62 | //\r | |
63 | ASSERT (IoMode == READ_DATA);\r | |
64 | ((FAT_DIRECTORY_ENTRY *) Entry)->FileName[0] = EMPTY_ENTRY_MARK;\r | |
65 | ((FAT_DIRECTORY_ENTRY *) Entry)->Attributes = 0;\r | |
66 | return EFI_SUCCESS;\r | |
67 | }\r | |
68 | \r | |
69 | BufferSize = sizeof (FAT_DIRECTORY_ENTRY);\r | |
149d6335 | 70 | return FatAccessOFile (Parent, IoMode, Position, &BufferSize, Entry, NULL);\r |
b9ec9330 QH |
71 | }\r |
72 | \r | |
73 | EFI_STATUS\r | |
74 | FatStoreDirEnt (\r | |
75 | IN FAT_OFILE *OFile,\r | |
76 | IN FAT_DIRENT *DirEnt\r | |
77 | )\r | |
78 | /*++\r | |
79 | \r | |
80 | Routine Description:\r | |
81 | \r | |
82 | Save the directory entry to disk.\r | |
83 | \r | |
84 | Arguments:\r | |
85 | \r | |
86 | OFile - The parent OFile which needs to update.\r | |
87 | DirEnt - The directory entry to be saved.\r | |
88 | \r | |
89 | Returns:\r | |
90 | \r | |
91 | EFI_SUCCESS - Store the directory entry successfully.\r | |
92 | other - An error occurred when writing the directory entry.\r | |
93 | \r | |
94 | --*/\r | |
95 | {\r | |
96 | EFI_STATUS Status;\r | |
97 | FAT_DIRECTORY_LFN LfnEntry;\r | |
98 | UINTN EntryPos;\r | |
99 | CHAR16 *LfnBufferPointer;\r | |
100 | CHAR16 LfnBuffer[MAX_LFN_ENTRIES * LFN_CHAR_TOTAL + 1];\r | |
101 | UINT8 EntryCount;\r | |
102 | UINT8 LfnOrdinal;\r | |
103 | \r | |
104 | EntryPos = DirEnt->EntryPos;\r | |
105 | EntryCount = DirEnt->EntryCount;\r | |
106 | //\r | |
107 | // Write directory entry\r | |
108 | //\r | |
109 | Status = FatAccessEntry (OFile, WRITE_DATA, EntryPos, &DirEnt->Entry);\r | |
110 | if (EFI_ERROR (Status)) {\r | |
111 | return Status;\r | |
112 | }\r | |
113 | \r | |
114 | if (--EntryCount > 0) {\r | |
115 | //\r | |
116 | // Write LFN directory entry\r | |
117 | //\r | |
118 | SetMem (LfnBuffer, sizeof (CHAR16) * LFN_CHAR_TOTAL * EntryCount, 0xff);\r | |
119 | StrCpy (LfnBuffer, DirEnt->FileString);\r | |
120 | LfnBufferPointer = LfnBuffer;\r | |
121 | LfnEntry.Attributes = FAT_ATTRIBUTE_LFN;\r | |
122 | LfnEntry.Type = 0;\r | |
123 | LfnEntry.MustBeZero = 0;\r | |
124 | LfnEntry.Checksum = FatCheckSum (DirEnt->Entry.FileName);\r | |
125 | for (LfnOrdinal = 1; LfnOrdinal <= EntryCount; LfnOrdinal++) {\r | |
126 | LfnEntry.Ordinal = LfnOrdinal;\r | |
127 | if (LfnOrdinal == EntryCount) {\r | |
128 | LfnEntry.Ordinal |= FAT_LFN_LAST;\r | |
129 | }\r | |
130 | \r | |
131 | CopyMem (LfnEntry.Name1, LfnBufferPointer, sizeof (CHAR16) * LFN_CHAR1_LEN);\r | |
132 | LfnBufferPointer += LFN_CHAR1_LEN;\r | |
133 | CopyMem (LfnEntry.Name2, LfnBufferPointer, sizeof (CHAR16) * LFN_CHAR2_LEN);\r | |
134 | LfnBufferPointer += LFN_CHAR2_LEN;\r | |
135 | CopyMem (LfnEntry.Name3, LfnBufferPointer, sizeof (CHAR16) * LFN_CHAR3_LEN);\r | |
136 | LfnBufferPointer += LFN_CHAR3_LEN;\r | |
137 | EntryPos--;\r | |
138 | if (DirEnt->Invalid) {\r | |
139 | LfnEntry.Ordinal = DELETE_ENTRY_MARK;\r | |
140 | }\r | |
141 | \r | |
142 | Status = FatAccessEntry (OFile, WRITE_DATA, EntryPos, &LfnEntry);\r | |
143 | if (EFI_ERROR (Status)) {\r | |
144 | return Status;\r | |
145 | }\r | |
146 | }\r | |
147 | }\r | |
148 | \r | |
149 | return EFI_SUCCESS;\r | |
150 | }\r | |
151 | \r | |
152 | BOOLEAN\r | |
153 | FatIsDotDirEnt (\r | |
154 | IN FAT_DIRENT *DirEnt\r | |
155 | )\r | |
156 | /*++\r | |
157 | \r | |
158 | Routine Description:\r | |
159 | \r | |
160 | Determine whether the directory entry is "." or ".." entry.\r | |
161 | \r | |
162 | Arguments:\r | |
163 | \r | |
164 | DirEnt - The corresponding directory entry.\r | |
165 | \r | |
166 | Returns:\r | |
167 | \r | |
168 | TRUE - The directory entry is "." or ".." directory entry\r | |
169 | FALSE - The directory entry is not "." or ".." directory entry\r | |
170 | \r | |
171 | --*/\r | |
172 | {\r | |
173 | CHAR16 *FileString;\r | |
174 | FileString = DirEnt->FileString;\r | |
175 | if (StrCmp (FileString, L".") == 0 || StrCmp (FileString, L"..") == 0) {\r | |
176 | return TRUE;\r | |
177 | }\r | |
178 | \r | |
179 | return FALSE;\r | |
180 | }\r | |
181 | \r | |
182 | STATIC\r | |
183 | VOID\r | |
184 | FatSetDirEntCluster (\r | |
185 | IN FAT_OFILE *OFile\r | |
186 | )\r | |
187 | /*++\r | |
188 | \r | |
189 | Routine Description:\r | |
190 | \r | |
191 | Set the OFile's cluster info in its directory entry.\r | |
192 | \r | |
193 | Arguments:\r | |
194 | \r | |
195 | OFile - The corresponding OFile.\r | |
196 | \r | |
197 | Returns:\r | |
198 | \r | |
199 | None.\r | |
200 | \r | |
201 | --*/\r | |
202 | {\r | |
203 | UINTN Cluster;\r | |
204 | FAT_DIRENT *DirEnt;\r | |
205 | \r | |
206 | DirEnt = OFile->DirEnt;\r | |
207 | Cluster = OFile->FileCluster;\r | |
208 | DirEnt->Entry.FileClusterHigh = (UINT16) (Cluster >> 16);\r | |
209 | DirEnt->Entry.FileCluster = (UINT16) Cluster;\r | |
210 | }\r | |
211 | \r | |
212 | VOID\r | |
213 | FatUpdateDirEntClusterSizeInfo (\r | |
214 | IN FAT_OFILE *OFile\r | |
215 | )\r | |
216 | /*++\r | |
217 | \r | |
218 | Routine Description:\r | |
219 | \r | |
220 | Set the OFile's cluster and size info in its directory entry.\r | |
221 | \r | |
222 | Arguments:\r | |
223 | \r | |
224 | OFile - The corresponding OFile.\r | |
225 | \r | |
226 | Returns:\r | |
227 | \r | |
228 | None.\r | |
229 | \r | |
230 | --*/\r | |
231 | {\r | |
232 | ASSERT (OFile->ODir == NULL);\r | |
233 | OFile->DirEnt->Entry.FileSize = (UINT32) OFile->FileSize;\r | |
234 | FatSetDirEntCluster (OFile);\r | |
235 | }\r | |
236 | \r | |
237 | VOID\r | |
238 | FatCloneDirEnt (\r | |
239 | IN FAT_DIRENT *DirEnt1,\r | |
240 | IN FAT_DIRENT *DirEnt2\r | |
241 | )\r | |
242 | /*++\r | |
243 | \r | |
244 | Routine Description:\r | |
245 | \r | |
246 | Copy all the information of DirEnt2 to DirEnt1 except for 8.3 name.\r | |
247 | \r | |
248 | Arguments:\r | |
249 | \r | |
250 | DirEnt1 - The destination directory entry.\r | |
251 | DirEnt2 - The source directory entry.\r | |
252 | \r | |
253 | Returns:\r | |
254 | \r | |
255 | None.\r | |
256 | \r | |
257 | --*/\r | |
258 | {\r | |
259 | UINT8 *Entry1;\r | |
260 | UINT8 *Entry2;\r | |
261 | Entry1 = (UINT8 *) &DirEnt1->Entry;\r | |
262 | Entry2 = (UINT8 *) &DirEnt2->Entry;\r | |
263 | CopyMem (\r | |
264 | Entry1 + FAT_ENTRY_INFO_OFFSET,\r | |
265 | Entry2 + FAT_ENTRY_INFO_OFFSET,\r | |
266 | sizeof (FAT_DIRECTORY_ENTRY) - FAT_ENTRY_INFO_OFFSET\r | |
267 | );\r | |
268 | }\r | |
269 | \r | |
270 | STATIC\r | |
271 | VOID\r | |
272 | FatLoadLongNameEntry (\r | |
273 | IN FAT_OFILE *Parent,\r | |
274 | IN FAT_DIRENT *DirEnt\r | |
275 | )\r | |
276 | /*++\r | |
277 | \r | |
278 | Routine Description:\r | |
279 | \r | |
280 | Get the LFN for the directory entry.\r | |
281 | \r | |
282 | Arguments:\r | |
283 | \r | |
284 | Parent - The parent directory.\r | |
285 | DirEnt - The directory entry to get LFN.\r | |
286 | \r | |
287 | Returns:\r | |
288 | \r | |
289 | None.\r | |
290 | \r | |
291 | --*/\r | |
292 | {\r | |
293 | CHAR16 LfnBuffer[MAX_LFN_ENTRIES * LFN_CHAR_TOTAL + 1];\r | |
294 | CHAR16 *LfnBufferPointer;\r | |
295 | CHAR8 *File8Dot3Name;\r | |
296 | UINTN EntryPos;\r | |
297 | UINT8 LfnOrdinal;\r | |
298 | UINT8 LfnChecksum;\r | |
299 | FAT_DIRECTORY_LFN LfnEntry;\r | |
300 | EFI_STATUS Status;\r | |
301 | \r | |
302 | EntryPos = DirEnt->EntryPos;\r | |
303 | File8Dot3Name = DirEnt->Entry.FileName;\r | |
304 | LfnBufferPointer = LfnBuffer;\r | |
305 | //\r | |
306 | // Computes checksum for LFN\r | |
307 | //\r | |
308 | LfnChecksum = FatCheckSum (File8Dot3Name);\r | |
309 | LfnOrdinal = 1;\r | |
310 | do {\r | |
311 | if (EntryPos == 0) {\r | |
312 | LfnBufferPointer = LfnBuffer;\r | |
313 | break;\r | |
314 | }\r | |
315 | \r | |
316 | EntryPos--;\r | |
317 | Status = FatAccessEntry (Parent, READ_DATA, EntryPos, &LfnEntry);\r | |
318 | if (EFI_ERROR (Status) ||\r | |
319 | LfnEntry.Attributes != FAT_ATTRIBUTE_LFN ||\r | |
320 | LfnEntry.MustBeZero != 0 ||\r | |
321 | LfnEntry.Checksum != LfnChecksum ||\r | |
322 | (LfnEntry.Ordinal & (~FAT_LFN_LAST)) != LfnOrdinal ||\r | |
323 | LfnOrdinal > MAX_LFN_ENTRIES\r | |
324 | ) {\r | |
325 | //\r | |
326 | // The directory entry does not have a long file name or\r | |
327 | // some error occurs when loading long file name for a directory entry,\r | |
328 | // and then we load the long name from short name\r | |
329 | //\r | |
330 | LfnBufferPointer = LfnBuffer;\r | |
331 | break;\r | |
332 | }\r | |
333 | \r | |
334 | CopyMem (LfnBufferPointer, LfnEntry.Name1, sizeof (CHAR16) * LFN_CHAR1_LEN);\r | |
335 | LfnBufferPointer += LFN_CHAR1_LEN;\r | |
336 | CopyMem (LfnBufferPointer, LfnEntry.Name2, sizeof (CHAR16) * LFN_CHAR2_LEN);\r | |
337 | LfnBufferPointer += LFN_CHAR2_LEN;\r | |
338 | CopyMem (LfnBufferPointer, LfnEntry.Name3, sizeof (CHAR16) * LFN_CHAR3_LEN);\r | |
339 | LfnBufferPointer += LFN_CHAR3_LEN;\r | |
340 | LfnOrdinal++;\r | |
341 | } while ((LfnEntry.Ordinal & FAT_LFN_LAST) == 0);\r | |
342 | DirEnt->EntryCount = LfnOrdinal;\r | |
343 | //\r | |
344 | // Terminate current Lfnbuffer\r | |
345 | //\r | |
346 | *LfnBufferPointer = 0;\r | |
347 | if (LfnBufferPointer == LfnBuffer) {\r | |
348 | //\r | |
349 | // Fail to get the long file name from long file name entry,\r | |
350 | // get the file name from short name\r | |
351 | //\r | |
352 | FatGetFileNameViaCaseFlag (DirEnt, LfnBuffer);\r | |
353 | }\r | |
354 | \r | |
355 | DirEnt->FileString = AllocateCopyPool (StrSize (LfnBuffer), LfnBuffer);\r | |
356 | }\r | |
357 | \r | |
358 | STATIC\r | |
359 | VOID\r | |
360 | FatAddDirEnt (\r | |
361 | IN FAT_ODIR *ODir,\r | |
362 | IN FAT_DIRENT *DirEnt\r | |
363 | )\r | |
364 | /*++\r | |
365 | \r | |
366 | Routine Description:\r | |
367 | \r | |
368 | Add this directory entry node to the list of directory entries and hash table.\r | |
369 | \r | |
370 | Arguments:\r | |
371 | \r | |
372 | ODir - The parent OFile which needs to be updated.\r | |
373 | DirEnt - The directory entry to be added.\r | |
374 | \r | |
375 | Returns:\r | |
376 | \r | |
377 | None.\r | |
378 | \r | |
379 | --*/\r | |
380 | {\r | |
381 | if (DirEnt->Link.BackLink == NULL) {\r | |
382 | DirEnt->Link.BackLink = &ODir->ChildList;\r | |
383 | }\r | |
384 | InsertTailList (DirEnt->Link.BackLink, &DirEnt->Link);\r | |
385 | FatInsertToHashTable (ODir, DirEnt);\r | |
386 | }\r | |
387 | \r | |
388 | STATIC\r | |
389 | EFI_STATUS\r | |
390 | FatLoadNextDirEnt (\r | |
391 | IN FAT_OFILE *OFile,\r | |
392 | OUT FAT_DIRENT **PtrDirEnt\r | |
393 | )\r | |
394 | /*++\r | |
395 | \r | |
396 | Routine Description:\r | |
397 | \r | |
398 | Load from disk the next directory entry at current end of directory position\r | |
399 | \r | |
400 | Arguments:\r | |
401 | \r | |
402 | OFile - The parent OFile.\r | |
403 | PtrDirEnt - The directory entry that is loaded.\r | |
404 | \r | |
405 | Returns:\r | |
406 | \r | |
407 | EFI_SUCCESS - Load the directory entry successfully.\r | |
408 | EFI_OUT_OF_RESOURCES - Out of resource.\r | |
409 | other - An error occurred when reading the directory entries.\r | |
410 | \r | |
411 | --*/\r | |
412 | {\r | |
413 | EFI_STATUS Status;\r | |
414 | FAT_DIRENT *DirEnt;\r | |
415 | FAT_ODIR *ODir;\r | |
416 | FAT_DIRECTORY_ENTRY Entry;\r | |
417 | \r | |
418 | ODir = OFile->ODir;\r | |
419 | //\r | |
420 | // Make sure the parent's directory has been opened\r | |
421 | //\r | |
422 | ASSERT (ODir != NULL);\r | |
423 | //\r | |
424 | // Assert we have not reached the end of directory\r | |
425 | //\r | |
426 | ASSERT (!ODir->EndOfDir);\r | |
427 | DirEnt = NULL;\r | |
428 | \r | |
429 | for (;;) {\r | |
430 | //\r | |
431 | // Read the next directory entry until we find a valid directory entry (excluding lfn entry)\r | |
432 | //\r | |
433 | Status = FatAccessEntry (OFile, READ_DATA, ODir->CurrentEndPos, &Entry);\r | |
434 | if (EFI_ERROR (Status)) {\r | |
435 | return Status;\r | |
436 | }\r | |
437 | \r | |
438 | if (((UINT8) Entry.FileName[0] != DELETE_ENTRY_MARK) && (Entry.Attributes & FAT_ATTRIBUTE_VOLUME_ID) == 0) {\r | |
439 | //\r | |
440 | // We get a valid directory entry, then handle it\r | |
441 | //\r | |
442 | break;\r | |
443 | }\r | |
444 | \r | |
445 | ODir->CurrentEndPos++;\r | |
446 | }\r | |
447 | \r | |
448 | if (Entry.FileName[0] != EMPTY_ENTRY_MARK) {\r | |
449 | //\r | |
450 | // Although FAT spec states this field is always 0 for FAT12 & FAT16, some applications\r | |
451 | // might use it for some special usage, it is safer to zero it in memory for FAT12 & FAT16.\r | |
452 | //\r | |
453 | if (OFile->Volume->FatType != FAT32) {\r | |
454 | Entry.FileClusterHigh = 0;\r | |
455 | }\r | |
456 | \r | |
457 | //\r | |
458 | // This is a valid directory entry\r | |
459 | //\r | |
460 | DirEnt = AllocateZeroPool (sizeof (FAT_DIRENT));\r | |
461 | if (DirEnt == NULL) {\r | |
462 | return EFI_OUT_OF_RESOURCES;\r | |
463 | }\r | |
464 | \r | |
465 | DirEnt->Signature = FAT_DIRENT_SIGNATURE;\r | |
466 | //\r | |
467 | // Remember the directory's entry position on disk\r | |
468 | //\r | |
469 | DirEnt->EntryPos = (UINT16) ODir->CurrentEndPos;\r | |
470 | CopyMem (&DirEnt->Entry, &Entry, sizeof (FAT_DIRECTORY_ENTRY));\r | |
471 | FatLoadLongNameEntry (OFile, DirEnt);\r | |
472 | if (DirEnt->FileString == NULL) {\r | |
473 | Status = EFI_OUT_OF_RESOURCES;\r | |
474 | goto Done;\r | |
475 | }\r | |
476 | //\r | |
477 | // Add this directory entry to directory\r | |
478 | //\r | |
479 | FatAddDirEnt (ODir, DirEnt);\r | |
480 | //\r | |
481 | // Point to next directory entry\r | |
482 | //\r | |
483 | ODir->CurrentEndPos++;\r | |
484 | } else {\r | |
485 | ODir->EndOfDir = TRUE;\r | |
486 | }\r | |
487 | \r | |
488 | *PtrDirEnt = DirEnt;\r | |
489 | return EFI_SUCCESS;\r | |
490 | \r | |
491 | Done:\r | |
492 | FatFreeDirEnt (DirEnt);\r | |
493 | return Status;\r | |
494 | }\r | |
495 | \r | |
496 | EFI_STATUS\r | |
497 | FatGetDirEntInfo (\r | |
498 | IN FAT_VOLUME *Volume,\r | |
499 | IN FAT_DIRENT *DirEnt,\r | |
500 | IN OUT UINTN *BufferSize,\r | |
501 | OUT VOID *Buffer\r | |
502 | )\r | |
503 | /*++\r | |
504 | \r | |
505 | Routine Description:\r | |
506 | \r | |
507 | Get the directory entry's info into Buffer.\r | |
508 | \r | |
509 | Arguments:\r | |
510 | \r | |
511 | Volume - FAT file system volume.\r | |
512 | DirEnt - The corresponding directory entry.\r | |
513 | BufferSize - Size of Buffer.\r | |
514 | Buffer - Buffer containing file info.\r | |
515 | \r | |
516 | Returns:\r | |
517 | \r | |
518 | EFI_SUCCESS - Get the file info successfully.\r | |
519 | EFI_BUFFER_TOO_SMALL - The buffer is too small.\r | |
520 | \r | |
521 | --*/\r | |
522 | {\r | |
523 | UINTN Size;\r | |
524 | UINTN NameSize;\r | |
525 | UINTN ResultSize;\r | |
526 | UINTN Cluster;\r | |
527 | EFI_STATUS Status;\r | |
528 | EFI_FILE_INFO *Info;\r | |
529 | FAT_DIRECTORY_ENTRY *Entry;\r | |
530 | FAT_DATE_TIME FatLastAccess;\r | |
531 | \r | |
532 | ASSERT_VOLUME_LOCKED (Volume);\r | |
533 | \r | |
534 | Size = SIZE_OF_EFI_FILE_INFO;\r | |
535 | NameSize = StrSize (DirEnt->FileString);\r | |
536 | ResultSize = Size + NameSize;\r | |
537 | \r | |
538 | Status = EFI_BUFFER_TOO_SMALL;\r | |
539 | if (*BufferSize >= ResultSize) {\r | |
540 | Status = EFI_SUCCESS;\r | |
541 | Entry = &DirEnt->Entry;\r | |
542 | Info = Buffer;\r | |
543 | Info->Size = ResultSize;\r | |
544 | if ((Entry->Attributes & FAT_ATTRIBUTE_DIRECTORY) != 0) {\r | |
545 | Cluster = (Entry->FileClusterHigh << 16) | Entry->FileCluster;\r | |
546 | Info->PhysicalSize = FatPhysicalDirSize (Volume, Cluster);\r | |
547 | Info->FileSize = Info->PhysicalSize;\r | |
548 | } else {\r | |
549 | Info->FileSize = Entry->FileSize;\r | |
550 | Info->PhysicalSize = FatPhysicalFileSize (Volume, Entry->FileSize);\r | |
551 | }\r | |
552 | \r | |
553 | ZeroMem (&FatLastAccess.Time, sizeof (FatLastAccess.Time));\r | |
554 | CopyMem (&FatLastAccess.Date, &Entry->FileLastAccess, sizeof (FatLastAccess.Date));\r | |
555 | FatFatTimeToEfiTime (&FatLastAccess, &Info->LastAccessTime);\r | |
556 | FatFatTimeToEfiTime (&Entry->FileCreateTime, &Info->CreateTime);\r | |
557 | FatFatTimeToEfiTime (&Entry->FileModificationTime, &Info->ModificationTime);\r | |
558 | Info->Attribute = Entry->Attributes & EFI_FILE_VALID_ATTR;\r | |
559 | CopyMem ((CHAR8 *) Buffer + Size, DirEnt->FileString, NameSize);\r | |
560 | }\r | |
561 | \r | |
562 | *BufferSize = ResultSize;\r | |
563 | return Status;\r | |
564 | }\r | |
565 | \r | |
566 | STATIC\r | |
567 | EFI_STATUS\r | |
568 | FatSearchODir (\r | |
569 | IN FAT_OFILE *OFile,\r | |
570 | IN CHAR16 *FileNameString,\r | |
571 | OUT FAT_DIRENT **PtrDirEnt\r | |
572 | )\r | |
573 | /*++\r | |
574 | \r | |
575 | Routine Description:\r | |
576 | \r | |
577 | Search the directory for the directory entry whose filename is FileNameString.\r | |
578 | \r | |
579 | Arguments:\r | |
580 | \r | |
581 | OFile - The parent OFile whose directory is to be searched.\r | |
582 | FileNameString - The filename to be searched.\r | |
583 | PtrDirEnt - pointer to the directory entry if found.\r | |
584 | \r | |
585 | Returns:\r | |
586 | \r | |
587 | EFI_SUCCESS - Find the directory entry or not found.\r | |
588 | other - An error occurred when reading the directory entries.\r | |
589 | \r | |
590 | --*/\r | |
591 | {\r | |
592 | BOOLEAN PossibleShortName;\r | |
593 | CHAR8 File8Dot3Name[FAT_NAME_LEN];\r | |
594 | FAT_ODIR *ODir;\r | |
595 | FAT_DIRENT *DirEnt;\r | |
596 | EFI_STATUS Status;\r | |
597 | \r | |
598 | ODir = OFile->ODir;\r | |
599 | ASSERT (ODir != NULL);\r | |
600 | //\r | |
601 | // Check if the file name is a valid short name\r | |
602 | //\r | |
603 | PossibleShortName = FatCheckIs8Dot3Name (FileNameString, File8Dot3Name);\r | |
604 | //\r | |
605 | // Search the hash table first\r | |
606 | //\r | |
607 | DirEnt = *FatLongNameHashSearch (ODir, FileNameString);\r | |
608 | if (DirEnt == NULL && PossibleShortName) {\r | |
609 | DirEnt = *FatShortNameHashSearch (ODir, File8Dot3Name);\r | |
610 | }\r | |
611 | if (DirEnt == NULL) {\r | |
612 | //\r | |
613 | // We fail to get the directory entry from hash table; we then\r | |
614 | // search the rest directory\r | |
615 | //\r | |
616 | while (!ODir->EndOfDir) {\r | |
617 | Status = FatLoadNextDirEnt (OFile, &DirEnt);\r | |
618 | if (EFI_ERROR (Status)) {\r | |
619 | return Status;\r | |
620 | }\r | |
621 | \r | |
622 | if (DirEnt != NULL) {\r | |
623 | if (FatStriCmp (FileNameString, DirEnt->FileString) == 0) {\r | |
624 | break;\r | |
625 | }\r | |
626 | \r | |
627 | if (PossibleShortName && CompareMem (File8Dot3Name, DirEnt->Entry.FileName, FAT_NAME_LEN) == 0) {\r | |
628 | break;\r | |
629 | }\r | |
630 | }\r | |
631 | }\r | |
632 | }\r | |
633 | \r | |
634 | *PtrDirEnt = DirEnt;\r | |
635 | return EFI_SUCCESS;\r | |
636 | }\r | |
637 | \r | |
638 | VOID\r | |
639 | FatResetODirCursor (\r | |
640 | IN FAT_OFILE *OFile\r | |
641 | )\r | |
642 | /*++\r | |
643 | \r | |
644 | Routine Description:\r | |
645 | \r | |
646 | Set the OFile's current directory cursor to the list head.\r | |
647 | \r | |
648 | Arguments:\r | |
649 | \r | |
650 | OFile - The directory OFile whose directory cursor is reset.\r | |
651 | \r | |
652 | Returns:\r | |
653 | \r | |
654 | None.\r | |
655 | \r | |
656 | --*/\r | |
657 | {\r | |
658 | FAT_ODIR *ODir;\r | |
659 | \r | |
660 | ODir = OFile->ODir;\r | |
661 | ASSERT (ODir != NULL);\r | |
662 | ODir->CurrentCursor = &(ODir->ChildList);\r | |
663 | ODir->CurrentPos = 0;\r | |
664 | }\r | |
665 | \r | |
666 | EFI_STATUS\r | |
667 | FatGetNextDirEnt (\r | |
668 | IN FAT_OFILE *OFile,\r | |
669 | OUT FAT_DIRENT **PtrDirEnt\r | |
670 | )\r | |
671 | /*++\r | |
672 | \r | |
673 | Routine Description:\r | |
674 | \r | |
c3b8ec43 | 675 | Set the directory's cursor to the next and get the next directory entry.\r |
b9ec9330 QH |
676 | \r |
677 | Arguments:\r | |
678 | \r | |
679 | OFile - The parent OFile.\r | |
680 | PtrDirEnt - The next directory entry.\r | |
681 | \r | |
682 | Returns:\r | |
683 | \r | |
684 | EFI_SUCCESS - We get the next directory entry successfully.\r | |
685 | other - An error occurred when get next directory entry.\r | |
686 | \r | |
687 | --*/\r | |
688 | {\r | |
689 | EFI_STATUS Status;\r | |
690 | FAT_DIRENT *DirEnt;\r | |
691 | FAT_ODIR *ODir;\r | |
692 | \r | |
693 | ODir = OFile->ODir;\r | |
694 | ASSERT (ODir != NULL);\r | |
695 | if (ODir->CurrentCursor->ForwardLink == &ODir->ChildList) {\r | |
696 | //\r | |
697 | // End of directory, we will try one more time\r | |
698 | //\r | |
699 | if (!ODir->EndOfDir) {\r | |
700 | //\r | |
701 | // Read directory from disk\r | |
702 | //\r | |
703 | Status = FatLoadNextDirEnt (OFile, &DirEnt);\r | |
704 | if (EFI_ERROR (Status)) {\r | |
705 | return Status;\r | |
706 | }\r | |
707 | }\r | |
708 | }\r | |
709 | \r | |
710 | if (ODir->CurrentCursor->ForwardLink == &ODir->ChildList) {\r | |
711 | //\r | |
712 | // End of directory, return NULL\r | |
713 | //\r | |
714 | DirEnt = NULL;\r | |
715 | ODir->CurrentPos = ODir->CurrentEndPos;\r | |
716 | } else {\r | |
717 | ODir->CurrentCursor = ODir->CurrentCursor->ForwardLink;\r | |
718 | DirEnt = DIRENT_FROM_LINK (ODir->CurrentCursor);\r | |
719 | ODir->CurrentPos = DirEnt->EntryPos + 1;\r | |
720 | }\r | |
721 | \r | |
722 | *PtrDirEnt = DirEnt;\r | |
723 | return EFI_SUCCESS;\r | |
724 | }\r | |
725 | \r | |
726 | STATIC\r | |
727 | VOID\r | |
728 | FatSetEntryCount (\r | |
729 | IN FAT_OFILE *OFile,\r | |
730 | IN FAT_DIRENT *DirEnt\r | |
731 | )\r | |
732 | /*++\r | |
733 | \r | |
734 | Routine Description:\r | |
735 | \r | |
736 | Set the directory entry count according to the filename.\r | |
737 | \r | |
738 | Arguments:\r | |
739 | \r | |
740 | OFile - The corresponding OFile.\r | |
741 | DirEnt - The directory entry to be set.\r | |
742 | \r | |
743 | Returns:\r | |
744 | \r | |
745 | None.\r | |
746 | \r | |
747 | --*/\r | |
748 | {\r | |
749 | CHAR16 *FileString;\r | |
750 | CHAR8 *File8Dot3Name;\r | |
751 | \r | |
752 | //\r | |
753 | // Get new entry count and set the 8.3 name\r | |
754 | //\r | |
755 | DirEnt->EntryCount = 1;\r | |
756 | FileString = DirEnt->FileString;\r | |
757 | File8Dot3Name = DirEnt->Entry.FileName;\r | |
758 | SetMem (File8Dot3Name, FAT_NAME_LEN, ' ');\r | |
759 | if (StrCmp (FileString, L".") == 0) {\r | |
760 | //\r | |
761 | // "." entry\r | |
762 | //\r | |
763 | File8Dot3Name[0] = '.';\r | |
764 | FatCloneDirEnt (DirEnt, OFile->DirEnt);\r | |
765 | } else if (StrCmp (FileString, L"..") == 0) {\r | |
766 | //\r | |
767 | // ".." entry\r | |
768 | //\r | |
769 | File8Dot3Name[0] = '.';\r | |
770 | File8Dot3Name[1] = '.';\r | |
771 | FatCloneDirEnt (DirEnt, OFile->Parent->DirEnt);\r | |
772 | } else {\r | |
773 | //\r | |
774 | // Normal name\r | |
775 | //\r | |
776 | if (FatCheckIs8Dot3Name (FileString, File8Dot3Name)) {\r | |
777 | //\r | |
778 | // This file name is a valid 8.3 file name, we need to further check its case flag\r | |
779 | //\r | |
780 | FatSetCaseFlag (DirEnt);\r | |
781 | } else {\r | |
782 | //\r | |
783 | // The file name is not a valid 8.3 name we need to generate an 8.3 name for it\r | |
784 | //\r | |
785 | FatCreate8Dot3Name (OFile, DirEnt);\r | |
786 | DirEnt->EntryCount = (UINT8)(LFN_ENTRY_NUMBER (StrLen (FileString)) + DirEnt->EntryCount);\r | |
787 | }\r | |
788 | }\r | |
789 | }\r | |
790 | \r | |
791 | STATIC\r | |
792 | EFI_STATUS\r | |
793 | FatExpandODir (\r | |
794 | IN FAT_OFILE *OFile\r | |
795 | )\r | |
796 | /*++\r | |
797 | \r | |
798 | Routine Description:\r | |
799 | \r | |
800 | Append a zero cluster to the current OFile.\r | |
801 | \r | |
802 | Arguments:\r | |
803 | \r | |
804 | OFile - The directory OFile which needs to be updated.\r | |
805 | \r | |
806 | Returns:\r | |
807 | \r | |
808 | EFI_SUCCESS - Append a zero cluster to the OFile successfully.\r | |
809 | other - An error occurred when appending the zero cluster.\r | |
810 | \r | |
811 | --*/\r | |
812 | {\r | |
813 | return FatExpandOFile (OFile, OFile->FileSize + OFile->Volume->ClusterSize);\r | |
814 | }\r | |
815 | \r | |
816 | STATIC\r | |
817 | EFI_STATUS\r | |
818 | FatSeekVolumeId (\r | |
819 | IN FAT_OFILE *Root,\r | |
820 | OUT FAT_DIRENT *DirEnt\r | |
821 | )\r | |
822 | /*++\r | |
823 | \r | |
824 | Routine Description:\r | |
825 | \r | |
826 | Search the Root OFile for the possible volume label.\r | |
827 | \r | |
828 | Arguments:\r | |
829 | \r | |
830 | Root - The Root OFile.\r | |
831 | DirEnt - The returned directory entry of volume label.\r | |
832 | \r | |
833 | Returns:\r | |
834 | \r | |
835 | EFI_SUCCESS - The search process is completed successfully.\r | |
836 | other - An error occurred when searching volume label.\r | |
837 | \r | |
838 | --*/\r | |
839 | {\r | |
840 | EFI_STATUS Status;\r | |
841 | UINTN EntryPos;\r | |
842 | FAT_DIRECTORY_ENTRY *Entry;\r | |
843 | \r | |
844 | EntryPos = 0;\r | |
845 | Entry = &DirEnt->Entry;\r | |
846 | DirEnt->Invalid = TRUE;\r | |
847 | do {\r | |
848 | Status = FatAccessEntry (Root, READ_DATA, EntryPos, Entry);\r | |
849 | if (EFI_ERROR (Status)) {\r | |
850 | return Status;\r | |
851 | }\r | |
852 | \r | |
853 | if (((UINT8) Entry->FileName[0] != DELETE_ENTRY_MARK) && (((Entry->Attributes) & (~FAT_ATTRIBUTE_ARCHIVE)) == FAT_ATTRIBUTE_VOLUME_ID)) {\r | |
854 | DirEnt->EntryPos = (UINT16) EntryPos;\r | |
855 | DirEnt->EntryCount = 1;\r | |
856 | DirEnt->Invalid = FALSE;\r | |
857 | break;\r | |
858 | }\r | |
859 | \r | |
860 | EntryPos++;\r | |
861 | } while (Entry->FileName[0] != EMPTY_ENTRY_MARK);\r | |
862 | return EFI_SUCCESS;\r | |
863 | }\r | |
864 | \r | |
865 | STATIC\r | |
866 | EFI_STATUS\r | |
867 | FatFirstFitInsertDirEnt (\r | |
868 | IN FAT_OFILE *OFile,\r | |
869 | IN FAT_DIRENT *DirEnt\r | |
870 | )\r | |
871 | /*++\r | |
872 | \r | |
873 | Routine Description:\r | |
874 | \r | |
875 | Use First Fit Algorithm to insert directory entry.\r | |
876 | Only this function will erase "E5" entries in a directory.\r | |
877 | In view of safest recovery, this function will only be triggered\r | |
878 | when maximum directory entry number has reached.\r | |
879 | \r | |
880 | Arguments:\r | |
881 | \r | |
882 | OFile - The corresponding OFile.\r | |
883 | DirEnt - The directory entry to be inserted.\r | |
884 | \r | |
885 | Returns:\r | |
886 | \r | |
887 | EFI_SUCCESS - The directory entry has been successfully inserted.\r | |
888 | EFI_VOLUME_FULL - The directory can not hold more directory entries.\r | |
889 | Others - Some error occurred when inserting new directory entries.\r | |
890 | \r | |
891 | --*/\r | |
892 | {\r | |
893 | EFI_STATUS Status;\r | |
894 | FAT_ODIR *ODir;\r | |
895 | LIST_ENTRY *CurrentEntry;\r | |
896 | FAT_DIRENT *CurrentDirEnt;\r | |
897 | UINT32 CurrentPos;\r | |
898 | UINT32 LabelPos;\r | |
899 | UINT32 NewEntryPos;\r | |
900 | UINT16 EntryCount;\r | |
901 | FAT_DIRENT LabelDirEnt;\r | |
902 | \r | |
903 | LabelPos = 0;\r | |
904 | if (OFile->Parent == NULL) {\r | |
905 | Status = FatSeekVolumeId (OFile, &LabelDirEnt);\r | |
906 | if (EFI_ERROR (Status)) {\r | |
907 | return Status;\r | |
908 | }\r | |
909 | \r | |
910 | if (!LabelDirEnt.Invalid) {\r | |
911 | LabelPos = LabelDirEnt.EntryPos;\r | |
912 | }\r | |
913 | }\r | |
914 | \r | |
915 | EntryCount = DirEnt->EntryCount;\r | |
916 | NewEntryPos = EntryCount;\r | |
917 | CurrentPos = 0;\r | |
918 | ODir = OFile->ODir;\r | |
919 | for (CurrentEntry = ODir->ChildList.ForwardLink;\r | |
920 | CurrentEntry != &ODir->ChildList;\r | |
921 | CurrentEntry = CurrentEntry->ForwardLink\r | |
922 | ) {\r | |
923 | CurrentDirEnt = DIRENT_FROM_LINK (CurrentEntry);\r | |
924 | if (NewEntryPos + CurrentDirEnt->EntryCount <= CurrentDirEnt->EntryPos) {\r | |
925 | if (LabelPos > NewEntryPos || LabelPos <= CurrentPos) {\r | |
926 | //\r | |
927 | // first fit succeeded\r | |
928 | //\r | |
929 | goto Done;\r | |
930 | }\r | |
931 | }\r | |
932 | \r | |
933 | CurrentPos = CurrentDirEnt->EntryPos;\r | |
934 | NewEntryPos = CurrentPos + EntryCount;\r | |
935 | }\r | |
936 | \r | |
937 | if (NewEntryPos >= ODir->CurrentEndPos) {\r | |
938 | return EFI_VOLUME_FULL;\r | |
939 | }\r | |
940 | \r | |
941 | Done:\r | |
942 | DirEnt->EntryPos = (UINT16) NewEntryPos;\r | |
943 | DirEnt->Link.BackLink = CurrentEntry;\r | |
944 | return EFI_SUCCESS;\r | |
945 | }\r | |
946 | \r | |
947 | STATIC\r | |
948 | EFI_STATUS\r | |
949 | FatNewEntryPos (\r | |
950 | IN FAT_OFILE *OFile,\r | |
951 | IN FAT_DIRENT *DirEnt\r | |
952 | )\r | |
953 | /*++\r | |
954 | \r | |
955 | Routine Description:\r | |
956 | \r | |
957 | Find the new directory entry position for the directory entry.\r | |
958 | \r | |
959 | Arguments:\r | |
960 | \r | |
961 | OFile - The corresponding OFile.\r | |
962 | DirEnt - The directory entry whose new position is to be set.\r | |
963 | \r | |
964 | Returns:\r | |
965 | \r | |
966 | EFI_SUCCESS - The new directory entry position is successfully found.\r | |
967 | EFI_VOLUME_FULL - The directory has reach its maximum capacity.\r | |
968 | other - An error occurred when reading the directory entry.\r | |
969 | \r | |
970 | --*/\r | |
971 | {\r | |
972 | EFI_STATUS Status;\r | |
973 | FAT_ODIR *ODir;\r | |
974 | FAT_DIRENT *TempDirEnt;\r | |
975 | UINT32 NewEndPos;\r | |
976 | \r | |
977 | ODir = OFile->ODir;\r | |
978 | ASSERT (ODir != NULL);\r | |
979 | //\r | |
980 | // Make sure the whole directory has been loaded\r | |
981 | //\r | |
982 | while (!ODir->EndOfDir) {\r | |
983 | Status = FatLoadNextDirEnt (OFile, &TempDirEnt);\r | |
984 | if (EFI_ERROR (Status)) {\r | |
985 | return Status;\r | |
986 | }\r | |
987 | }\r | |
988 | //\r | |
989 | // We will append this entry to the end of directory\r | |
990 | //\r | |
991 | FatGetCurrentFatTime (&DirEnt->Entry.FileCreateTime);\r | |
a13db369 KG |
992 | CopyMem (&DirEnt->Entry.FileModificationTime, &DirEnt->Entry.FileCreateTime, sizeof (FAT_DATE_TIME));\r |
993 | CopyMem (&DirEnt->Entry.FileLastAccess, &DirEnt->Entry.FileCreateTime.Date, sizeof (FAT_DATE));\r | |
b9ec9330 QH |
994 | NewEndPos = ODir->CurrentEndPos + DirEnt->EntryCount;\r |
995 | if (NewEndPos * sizeof (FAT_DIRECTORY_ENTRY) > OFile->FileSize) {\r | |
996 | if (NewEndPos >= (OFile->IsFixedRootDir ? OFile->Volume->RootEntries : FAT_MAX_DIRENTRY_COUNT)) {\r | |
997 | //\r | |
998 | // We try to use fist fit algorithm to insert this directory entry\r | |
999 | //\r | |
1000 | return FatFirstFitInsertDirEnt (OFile, DirEnt);\r | |
1001 | }\r | |
1002 | //\r | |
1003 | // We should allocate a new cluster for this directory\r | |
1004 | //\r | |
1005 | Status = FatExpandODir (OFile);\r | |
1006 | if (EFI_ERROR (Status)) {\r | |
1007 | return Status;\r | |
1008 | }\r | |
1009 | }\r | |
1010 | //\r | |
1011 | // We append our directory entry at the end of directory file\r | |
1012 | //\r | |
1013 | ODir->CurrentEndPos = NewEndPos;\r | |
1014 | DirEnt->EntryPos = (UINT16) (ODir->CurrentEndPos - 1);\r | |
1015 | return EFI_SUCCESS;\r | |
1016 | }\r | |
1017 | \r | |
1018 | EFI_STATUS\r | |
1019 | FatGetVolumeEntry (\r | |
1020 | IN FAT_VOLUME *Volume,\r | |
1021 | IN CHAR16 *Name\r | |
1022 | )\r | |
1023 | /*++\r | |
1024 | \r | |
1025 | Routine Description:\r | |
1026 | \r | |
1027 | Get the directory entry for the volume.\r | |
1028 | \r | |
1029 | Arguments:\r | |
1030 | \r | |
1031 | Volume - FAT file system volume.\r | |
1032 | Name - The file name of the volume.\r | |
1033 | \r | |
1034 | Returns:\r | |
1035 | \r | |
1036 | EFI_SUCCESS - Update the volume with the directory entry sucessfully.\r | |
1037 | others - An error occurred when getting volume label.\r | |
1038 | \r | |
1039 | --*/\r | |
1040 | {\r | |
1041 | EFI_STATUS Status;\r | |
1042 | FAT_DIRENT LabelDirEnt;\r | |
1043 | \r | |
1044 | *Name = 0;\r | |
1045 | Status = FatSeekVolumeId (Volume->Root, &LabelDirEnt);\r | |
1046 | if (!EFI_ERROR (Status)) {\r | |
1047 | if (!LabelDirEnt.Invalid) {\r | |
1048 | FatNameToStr (LabelDirEnt.Entry.FileName, FAT_NAME_LEN, FALSE, Name);\r | |
1049 | }\r | |
1050 | }\r | |
1051 | \r | |
1052 | return Status;\r | |
1053 | }\r | |
1054 | \r | |
1055 | EFI_STATUS\r | |
1056 | FatSetVolumeEntry (\r | |
1057 | IN FAT_VOLUME *Volume,\r | |
1058 | IN CHAR16 *Name\r | |
1059 | )\r | |
1060 | /*++\r | |
1061 | \r | |
1062 | Routine Description:\r | |
1063 | \r | |
1064 | Set the relevant directory entry into disk for the volume.\r | |
1065 | \r | |
1066 | Arguments:\r | |
1067 | \r | |
1068 | Volume - FAT file system volume.\r | |
1069 | Name - The new file name of the volume.\r | |
1070 | \r | |
1071 | Returns:\r | |
1072 | \r | |
1073 | EFI_SUCCESS - Update the Volume sucessfully.\r | |
1074 | EFI_UNSUPPORTED - The input label is not a valid volume label.\r | |
1075 | other - An error occurred when setting volume label.\r | |
1076 | \r | |
1077 | --*/\r | |
1078 | {\r | |
1079 | EFI_STATUS Status;\r | |
1080 | FAT_DIRENT LabelDirEnt;\r | |
1081 | FAT_OFILE *Root;\r | |
1082 | \r | |
1083 | Root = Volume->Root;\r | |
1084 | Status = FatSeekVolumeId (Volume->Root, &LabelDirEnt);\r | |
1085 | if (EFI_ERROR (Status)) {\r | |
1086 | return Status;\r | |
1087 | }\r | |
1088 | \r | |
1089 | if (LabelDirEnt.Invalid) {\r | |
1090 | //\r | |
1091 | // If there is not the relevant directory entry, create a new one\r | |
1092 | //\r | |
1093 | ZeroMem (&LabelDirEnt, sizeof (FAT_DIRENT));\r | |
1094 | LabelDirEnt.EntryCount = 1;\r | |
1095 | Status = FatNewEntryPos (Root, &LabelDirEnt);\r | |
1096 | if (EFI_ERROR (Status)) {\r | |
1097 | return Status;\r | |
1098 | }\r | |
1099 | \r | |
1100 | LabelDirEnt.Entry.Attributes = FAT_ATTRIBUTE_VOLUME_ID;\r | |
1101 | }\r | |
1102 | \r | |
1103 | SetMem (LabelDirEnt.Entry.FileName, FAT_NAME_LEN, ' ');\r | |
1104 | if (FatStrToFat (Name, FAT_NAME_LEN, LabelDirEnt.Entry.FileName)) {\r | |
1105 | return EFI_UNSUPPORTED;\r | |
1106 | }\r | |
1107 | \r | |
1108 | FatGetCurrentFatTime (&LabelDirEnt.Entry.FileModificationTime);\r | |
1109 | return FatStoreDirEnt (Root, &LabelDirEnt);\r | |
1110 | }\r | |
1111 | \r | |
1112 | EFI_STATUS\r | |
1113 | FatCreateDotDirEnts (\r | |
1114 | IN FAT_OFILE *OFile\r | |
1115 | )\r | |
1116 | /*++\r | |
1117 | \r | |
1118 | Routine Description:\r | |
1119 | \r | |
1120 | Create "." and ".." directory entries in the newly-created parent OFile.\r | |
1121 | \r | |
1122 | Arguments:\r | |
1123 | \r | |
1124 | OFile - The parent OFile.\r | |
1125 | \r | |
1126 | Returns:\r | |
1127 | \r | |
1128 | EFI_SUCCESS - The dot directory entries are successfully created.\r | |
1129 | other - An error occurred when creating the directory entry.\r | |
1130 | \r | |
1131 | --*/\r | |
1132 | {\r | |
1133 | EFI_STATUS Status;\r | |
1134 | FAT_DIRENT *DirEnt;\r | |
1135 | \r | |
1136 | Status = FatExpandODir (OFile);\r | |
1137 | if (EFI_ERROR (Status)) {\r | |
1138 | return Status;\r | |
1139 | }\r | |
1140 | \r | |
1141 | FatSetDirEntCluster (OFile);\r | |
1142 | //\r | |
1143 | // Create "."\r | |
1144 | //\r | |
1145 | Status = FatCreateDirEnt (OFile, L".", FAT_ATTRIBUTE_DIRECTORY, &DirEnt);\r | |
1146 | if (EFI_ERROR (Status)) {\r | |
1147 | return Status;\r | |
1148 | }\r | |
1149 | //\r | |
1150 | // Create ".."\r | |
1151 | //\r | |
1152 | Status = FatCreateDirEnt (OFile, L"..", FAT_ATTRIBUTE_DIRECTORY, &DirEnt);\r | |
1153 | return Status;\r | |
1154 | }\r | |
1155 | \r | |
1156 | EFI_STATUS\r | |
1157 | FatCreateDirEnt (\r | |
1158 | IN FAT_OFILE *OFile,\r | |
1159 | IN CHAR16 *FileName,\r | |
1160 | IN UINT8 Attributes,\r | |
1161 | OUT FAT_DIRENT **PtrDirEnt\r | |
1162 | )\r | |
1163 | /*++\r | |
1164 | \r | |
1165 | Routine Description:\r | |
1166 | \r | |
1167 | Create a directory entry in the parent OFile.\r | |
1168 | \r | |
1169 | Arguments:\r | |
1170 | \r | |
1171 | OFile - The parent OFile.\r | |
1172 | FileName - The filename of the newly-created directory entry.\r | |
1173 | Attributes - The attribute of the newly-created directory entry.\r | |
1174 | PtrDirEnt - The pointer to the newly-created directory entry.\r | |
1175 | \r | |
1176 | Returns:\r | |
1177 | \r | |
1178 | EFI_SUCCESS - The directory entry is successfully created.\r | |
1179 | EFI_OUT_OF_RESOURCES - Not enough memory to create the directory entry.\r | |
1180 | other - An error occurred when creating the directory entry.\r | |
1181 | \r | |
1182 | --*/\r | |
1183 | {\r | |
1184 | FAT_DIRENT *DirEnt;\r | |
1185 | FAT_ODIR *ODir;\r | |
1186 | EFI_STATUS Status;\r | |
1187 | \r | |
35053df3 | 1188 | ASSERT (OFile != NULL);\r |
b9ec9330 QH |
1189 | ODir = OFile->ODir;\r |
1190 | ASSERT (ODir != NULL);\r | |
1191 | DirEnt = AllocateZeroPool (sizeof (FAT_DIRENT));\r | |
1192 | if (DirEnt == NULL) {\r | |
1193 | return EFI_OUT_OF_RESOURCES;\r | |
1194 | }\r | |
1195 | \r | |
1196 | DirEnt->Signature = FAT_DIRENT_SIGNATURE;\r | |
1197 | DirEnt->FileString = AllocateCopyPool (StrSize (FileName), FileName);\r | |
1198 | if (DirEnt->FileString == NULL) {\r | |
1199 | Status = EFI_OUT_OF_RESOURCES;\r | |
1200 | goto Done;\r | |
1201 | }\r | |
1202 | //\r | |
1203 | // Determine how many directory entries we need\r | |
1204 | //\r | |
1205 | FatSetEntryCount (OFile, DirEnt);\r | |
1206 | //\r | |
1207 | // Determine the file's directory entry position\r | |
1208 | //\r | |
1209 | Status = FatNewEntryPos (OFile, DirEnt);\r | |
1210 | if (EFI_ERROR (Status)) {\r | |
1211 | goto Done;\r | |
1212 | }\r | |
1213 | \r | |
1214 | FatAddDirEnt (ODir, DirEnt);\r | |
1215 | DirEnt->Entry.Attributes = Attributes;\r | |
1216 | *PtrDirEnt = DirEnt;\r | |
1217 | DEBUG ((EFI_D_INFO, "FSOpen: Created new directory entry '%S'\n", DirEnt->FileString));\r | |
1218 | return FatStoreDirEnt (OFile, DirEnt);\r | |
1219 | \r | |
1220 | Done:\r | |
1221 | FatFreeDirEnt (DirEnt);\r | |
1222 | return Status;\r | |
1223 | }\r | |
1224 | \r | |
1225 | EFI_STATUS\r | |
1226 | FatRemoveDirEnt (\r | |
1227 | IN FAT_OFILE *OFile,\r | |
1228 | IN FAT_DIRENT *DirEnt\r | |
1229 | )\r | |
1230 | /*++\r | |
1231 | \r | |
1232 | Routine Description:\r | |
1233 | \r | |
1234 | Remove this directory entry node from the list of directory entries and hash table.\r | |
1235 | \r | |
1236 | Arguments:\r | |
1237 | \r | |
1238 | OFile - The parent OFile.\r | |
1239 | DirEnt - The directory entry to be removed.\r | |
1240 | \r | |
1241 | Returns:\r | |
1242 | \r | |
1243 | EFI_SUCCESS - The directory entry is successfully removed.\r | |
1244 | other - An error occurred when removing the directory entry.\r | |
1245 | \r | |
1246 | --*/\r | |
1247 | {\r | |
1248 | FAT_ODIR *ODir;\r | |
1249 | \r | |
1250 | ODir = OFile->ODir;\r | |
1251 | if (ODir->CurrentCursor == &DirEnt->Link) {\r | |
1252 | //\r | |
1253 | // Move the directory cursor to its previous directory entry\r | |
1254 | //\r | |
1255 | ODir->CurrentCursor = ODir->CurrentCursor->BackLink;\r | |
1256 | }\r | |
1257 | //\r | |
1258 | // Remove from directory entry list\r | |
1259 | //\r | |
1260 | RemoveEntryList (&DirEnt->Link);\r | |
1261 | //\r | |
1262 | // Remove from hash table\r | |
1263 | //\r | |
1264 | FatDeleteFromHashTable (ODir, DirEnt);\r | |
1265 | DirEnt->Entry.FileName[0] = DELETE_ENTRY_MARK;\r | |
1266 | DirEnt->Invalid = TRUE;\r | |
1267 | return FatStoreDirEnt (OFile, DirEnt);\r | |
1268 | }\r | |
1269 | \r | |
1270 | EFI_STATUS\r | |
1271 | FatOpenDirEnt (\r | |
1272 | IN FAT_OFILE *Parent,\r | |
1273 | IN FAT_DIRENT *DirEnt\r | |
1274 | )\r | |
1275 | /*++\r | |
1276 | \r | |
1277 | Routine Description:\r | |
1278 | \r | |
1279 | Open the directory entry to get the OFile.\r | |
1280 | \r | |
1281 | Arguments:\r | |
1282 | \r | |
1283 | OFile - The parent OFile.\r | |
1284 | DirEnt - The directory entry to be opened.\r | |
1285 | \r | |
1286 | Returns:\r | |
1287 | \r | |
1288 | EFI_SUCCESS - The directory entry is successfully opened.\r | |
1289 | EFI_OUT_OF_RESOURCES - not enough memory to allocate a new OFile.\r | |
1290 | other - An error occurred when opening the directory entry.\r | |
1291 | \r | |
1292 | --*/\r | |
1293 | {\r | |
1294 | FAT_OFILE *OFile;\r | |
1295 | FAT_VOLUME *Volume;\r | |
1296 | \r | |
1297 | if (DirEnt->OFile == NULL) {\r | |
1298 | //\r | |
1299 | // Open the directory entry\r | |
1300 | //\r | |
1301 | OFile = AllocateZeroPool (sizeof (FAT_OFILE));\r | |
1302 | if (OFile == NULL) {\r | |
1303 | return EFI_OUT_OF_RESOURCES;\r | |
1304 | }\r | |
1305 | \r | |
1306 | OFile->Signature = FAT_OFILE_SIGNATURE;\r | |
1307 | InitializeListHead (&OFile->Opens);\r | |
1308 | InitializeListHead (&OFile->ChildHead);\r | |
1309 | OFile->Parent = Parent;\r | |
1310 | OFile->DirEnt = DirEnt;\r | |
1311 | if (Parent != NULL) {\r | |
1312 | //\r | |
1313 | // The newly created OFile is not root\r | |
1314 | //\r | |
1315 | Volume = Parent->Volume;\r | |
1316 | OFile->FullPathLen = Parent->FullPathLen + 1 + StrLen (DirEnt->FileString);\r | |
1317 | OFile->FileCluster = ((DirEnt->Entry.FileClusterHigh) << 16) | (DirEnt->Entry.FileCluster);\r | |
1318 | InsertTailList (&Parent->ChildHead, &OFile->ChildLink);\r | |
1319 | } else {\r | |
1320 | //\r | |
1321 | // The newly created OFile is root\r | |
1322 | //\r | |
1323 | Volume = VOLUME_FROM_ROOT_DIRENT (DirEnt);\r | |
1324 | Volume->Root = OFile;\r | |
1325 | OFile->FileCluster = Volume->RootCluster;\r | |
1326 | if (Volume->FatType != FAT32) {\r | |
1327 | OFile->IsFixedRootDir = TRUE;\r | |
1328 | }\r | |
1329 | }\r | |
1330 | \r | |
1331 | OFile->FileCurrentCluster = OFile->FileCluster;\r | |
1332 | OFile->Volume = Volume;\r | |
1333 | InsertHeadList (&Volume->CheckRef, &OFile->CheckLink);\r | |
1334 | \r | |
1335 | OFile->FileSize = DirEnt->Entry.FileSize;\r | |
1336 | if ((DirEnt->Entry.Attributes & FAT_ATTRIBUTE_DIRECTORY) != 0) {\r | |
1337 | if (OFile->IsFixedRootDir) {\r | |
1338 | OFile->FileSize = Volume->RootEntries * sizeof (FAT_DIRECTORY_ENTRY);\r | |
1339 | } else {\r | |
1340 | OFile->FileSize = FatPhysicalDirSize (Volume, OFile->FileCluster);\r | |
1341 | }\r | |
1342 | \r | |
1343 | FatRequestODir (OFile);\r | |
1344 | if (OFile->ODir == NULL) {\r | |
1345 | return EFI_OUT_OF_RESOURCES;\r | |
1346 | }\r | |
1347 | }\r | |
1348 | \r | |
1349 | DirEnt->OFile = OFile;\r | |
1350 | }\r | |
1351 | \r | |
1352 | return EFI_SUCCESS;\r | |
1353 | }\r | |
1354 | \r | |
1355 | VOID\r | |
1356 | FatCloseDirEnt (\r | |
1357 | IN FAT_DIRENT *DirEnt\r | |
1358 | )\r | |
1359 | /*++\r | |
1360 | \r | |
1361 | Routine Description:\r | |
1362 | \r | |
1363 | Close the directory entry and free the OFile.\r | |
1364 | \r | |
1365 | Arguments:\r | |
1366 | \r | |
1367 | DirEnt - The directory entry to be closed.\r | |
1368 | \r | |
1369 | Returns:\r | |
1370 | \r | |
1371 | EFI_SUCCESS - The directory entry is successfully opened.\r | |
1372 | Other - An error occurred when opening the directory entry.\r | |
1373 | \r | |
1374 | --*/\r | |
1375 | {\r | |
1376 | FAT_OFILE *OFile;\r | |
1377 | FAT_VOLUME *Volume;\r | |
1378 | \r | |
1379 | OFile = DirEnt->OFile;\r | |
b9ec9330 | 1380 | ASSERT (OFile != NULL);\r |
35053df3 | 1381 | Volume = OFile->Volume;\r |
b9ec9330 QH |
1382 | \r |
1383 | if (OFile->ODir != NULL) {\r | |
1384 | FatDiscardODir (OFile);\r | |
1385 | }\r | |
1386 | \r | |
1387 | if (OFile->Parent == NULL) {\r | |
1388 | Volume->Root = NULL;\r | |
1389 | } else {\r | |
1390 | RemoveEntryList (&OFile->ChildLink);\r | |
1391 | }\r | |
1392 | \r | |
1393 | FreePool (OFile);\r | |
1394 | DirEnt->OFile = NULL;\r | |
1395 | if (DirEnt->Invalid == TRUE) {\r | |
1396 | //\r | |
1397 | // Free directory entry itself\r | |
1398 | //\r | |
1399 | FatFreeDirEnt (DirEnt);\r | |
1400 | }\r | |
1401 | }\r | |
1402 | \r | |
1403 | EFI_STATUS\r | |
1404 | FatLocateOFile (\r | |
1405 | IN OUT FAT_OFILE **PtrOFile,\r | |
1406 | IN CHAR16 *FileName,\r | |
1407 | IN UINT8 Attributes,\r | |
1408 | OUT CHAR16 *NewFileName\r | |
1409 | )\r | |
1410 | /*++\r | |
1411 | \r | |
1412 | Routine Description:\r | |
1413 | \r | |
1414 | Traverse filename and open all OFiles that can be opened.\r | |
1415 | Update filename pointer to the component that can't be opened.\r | |
1416 | If more than one name component remains, returns an error;\r | |
1417 | otherwise, return the remaining name component so that the caller might choose to create it.\r | |
1418 | \r | |
1419 | Arguments:\r | |
1420 | PtrOFile - As input, the reference OFile; as output, the located OFile.\r | |
1421 | FileName - The file name relevant to the OFile.\r | |
1422 | Attributes - The attribute of the destination OFile.\r | |
1423 | NewFileName - The remaining file name.\r | |
1424 | \r | |
1425 | Returns:\r | |
1426 | \r | |
1427 | EFI_NOT_FOUND - The file name can't be opened and there is more than one\r | |
1428 | components within the name left (this means the name can\r | |
1429 | not be created either).\r | |
1430 | EFI_INVALID_PARAMETER - The parameter is not valid.\r | |
1431 | EFI_SUCCESS - Open the file successfully.\r | |
1432 | other - An error occured when locating the OFile.\r | |
1433 | \r | |
1434 | --*/\r | |
1435 | {\r | |
1436 | EFI_STATUS Status;\r | |
1437 | FAT_VOLUME *Volume;\r | |
1438 | CHAR16 ComponentName[EFI_PATH_STRING_LENGTH];\r | |
1439 | UINTN FileNameLen;\r | |
1440 | BOOLEAN DirIntended;\r | |
1441 | CHAR16 *Next;\r | |
1442 | FAT_OFILE *OFile;\r | |
1443 | FAT_DIRENT *DirEnt;\r | |
1444 | \r | |
05bcb9e8 JJ |
1445 | DirEnt = NULL;\r |
1446 | \r | |
b9ec9330 QH |
1447 | FileNameLen = StrLen (FileName);\r |
1448 | if (FileNameLen == 0) {\r | |
1449 | return EFI_INVALID_PARAMETER;\r | |
1450 | }\r | |
1451 | \r | |
1452 | OFile = *PtrOFile;\r | |
1453 | Volume = OFile->Volume;\r | |
1454 | \r | |
1455 | DirIntended = FALSE;\r | |
1456 | if (FileName[FileNameLen - 1] == PATH_NAME_SEPARATOR) {\r | |
1457 | DirIntended = TRUE;\r | |
1458 | }\r | |
1459 | //\r | |
1460 | // If name starts with path name separator, then move to root OFile\r | |
1461 | //\r | |
1462 | if (*FileName == PATH_NAME_SEPARATOR) {\r | |
1463 | OFile = Volume->Root;\r | |
1464 | FileName++;\r | |
1465 | FileNameLen--;\r | |
1466 | }\r | |
1467 | //\r | |
1468 | // Per FAT Spec the file name should meet the following criteria:\r | |
1469 | // C1. Length (FileLongName) <= 255\r | |
1470 | // C2. Length (X:FileFullPath<NUL>) <= 260\r | |
1471 | // Here we check C2 first.\r | |
1472 | //\r | |
1473 | if (2 + OFile->FullPathLen + 1 + FileNameLen + 1 > EFI_PATH_STRING_LENGTH) {\r | |
1474 | //\r | |
1475 | // Full path length can not surpass 256\r | |
1476 | //\r | |
1477 | return EFI_INVALID_PARAMETER;\r | |
1478 | }\r | |
1479 | //\r | |
1480 | // Start at current location\r | |
1481 | //\r | |
1482 | Next = FileName;\r | |
1483 | for (;;) {\r | |
1484 | //\r | |
1485 | // Get the next component name\r | |
1486 | //\r | |
1487 | FileName = Next;\r | |
1488 | Next = FatGetNextNameComponent (FileName, ComponentName);\r | |
1489 | \r | |
1490 | //\r | |
1491 | // If end of the file name, we're done\r | |
1492 | //\r | |
1493 | if (ComponentName[0] == 0) {\r | |
1494 | if (DirIntended && OFile->ODir == NULL) {\r | |
1495 | return EFI_NOT_FOUND;\r | |
1496 | }\r | |
1497 | \r | |
1498 | NewFileName[0] = 0;\r | |
1499 | break;\r | |
1500 | }\r | |
1501 | //\r | |
1502 | // If "dot", then current\r | |
1503 | //\r | |
1504 | if (StrCmp (ComponentName, L".") == 0) {\r | |
1505 | continue;\r | |
1506 | }\r | |
1507 | //\r | |
1508 | // If "dot dot", then parent\r | |
1509 | //\r | |
1510 | if (StrCmp (ComponentName, L"..") == 0) {\r | |
1511 | if (OFile->Parent == NULL) {\r | |
1512 | return EFI_INVALID_PARAMETER;\r | |
1513 | }\r | |
1514 | OFile = OFile->Parent;\r | |
1515 | continue;\r | |
1516 | }\r | |
1517 | \r | |
1518 | if (!FatFileNameIsValid (ComponentName, NewFileName)) {\r | |
1519 | return EFI_INVALID_PARAMETER;\r | |
1520 | }\r | |
1521 | //\r | |
1522 | // We have a component name, try to open it\r | |
1523 | //\r | |
1524 | if (OFile->ODir == NULL) {\r | |
1525 | //\r | |
1526 | // This file isn't a directory, can't open it\r | |
1527 | //\r | |
1528 | return EFI_NOT_FOUND;\r | |
1529 | }\r | |
1530 | //\r | |
1531 | // Search the compName in the directory\r | |
1532 | //\r | |
1533 | Status = FatSearchODir (OFile, NewFileName, &DirEnt);\r | |
1534 | if (EFI_ERROR (Status)) {\r | |
1535 | return Status;\r | |
1536 | }\r | |
1537 | \r | |
1538 | if (DirEnt == NULL) {\r | |
1539 | //\r | |
1540 | // component name is not found in the directory\r | |
1541 | //\r | |
1542 | if (*Next != 0) {\r | |
1543 | return EFI_NOT_FOUND;\r | |
1544 | }\r | |
1545 | \r | |
1546 | if (DirIntended && (Attributes & FAT_ATTRIBUTE_DIRECTORY) == 0) {\r | |
1547 | return EFI_INVALID_PARAMETER;\r | |
1548 | }\r | |
1549 | //\r | |
1550 | // It's the last component name - return with the open\r | |
1551 | // path and the remaining name\r | |
1552 | //\r | |
1553 | break;\r | |
1554 | }\r | |
1555 | \r | |
1556 | Status = FatOpenDirEnt (OFile, DirEnt);\r | |
1557 | if (EFI_ERROR (Status)) {\r | |
1558 | return Status;\r | |
1559 | }\r | |
1560 | \r | |
1561 | OFile = DirEnt->OFile;\r | |
1562 | }\r | |
1563 | \r | |
1564 | *PtrOFile = OFile;\r | |
1565 | return EFI_SUCCESS;\r | |
1566 | }\r | |
1567 | \r |