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1 | /** @file\r | |
2 | Handle operations in files and directories from UDF/ECMA-167 file systems.\r | |
3 | \r | |
4 | Copyright (C) 2014-2017 Paulo Alcantara <pcacjr@zytor.com>\r | |
5 | \r | |
6 | This program and the accompanying materials are licensed and made available\r | |
7 | under the terms and conditions of the BSD License which accompanies this\r | |
8 | distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
12 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | **/\r | |
14 | \r | |
15 | #include "Udf.h"\r | |
16 | \r | |
17 | EFI_FILE_PROTOCOL gUdfFileIoOps = {\r | |
18 | EFI_FILE_PROTOCOL_REVISION,\r | |
19 | UdfOpen,\r | |
20 | UdfClose,\r | |
21 | UdfDelete,\r | |
22 | UdfRead,\r | |
23 | UdfWrite,\r | |
24 | UdfGetPosition,\r | |
25 | UdfSetPosition,\r | |
26 | UdfGetInfo,\r | |
27 | UdfSetInfo,\r | |
28 | UdfFlush,\r | |
29 | NULL,\r | |
30 | NULL,\r | |
31 | NULL,\r | |
32 | NULL\r | |
33 | };\r | |
34 | \r | |
35 | #define _ROOT_FILE(_PrivData) (_PrivData)->Root\r | |
36 | #define _PARENT_FILE(_PrivData) \\r | |
37 | ((_PrivData)->IsRootDirectory ? (_PrivData)->Root : &(_PrivData)->File)\r | |
38 | #define _FILE(_PrivData) _PARENT_FILE(_PrivData)\r | |
39 | \r | |
40 | /**\r | |
41 | Open the root directory on a volume.\r | |
42 | \r | |
43 | @param This Protocol instance pointer.\r | |
44 | @param Root Returns an Open file handle for the root directory\r | |
45 | \r | |
46 | @retval EFI_SUCCESS The device was opened.\r | |
47 | @retval EFI_UNSUPPORTED This volume does not support the file system.\r | |
48 | @retval EFI_NO_MEDIA The device has no media.\r | |
49 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
50 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
51 | @retval EFI_ACCESS_DENIED The service denied access to the file.\r | |
52 | @retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of\r | |
53 | resources.\r | |
54 | \r | |
55 | **/\r | |
56 | EFI_STATUS\r | |
57 | EFIAPI\r | |
58 | UdfOpenVolume (\r | |
59 | IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *This,\r | |
60 | OUT EFI_FILE_PROTOCOL **Root\r | |
61 | )\r | |
62 | {\r | |
63 | EFI_TPL OldTpl;\r | |
64 | EFI_STATUS Status;\r | |
65 | PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;\r | |
66 | PRIVATE_UDF_FILE_DATA *PrivFileData;\r | |
67 | \r | |
68 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
69 | \r | |
70 | if (This == NULL || Root == NULL) {\r | |
71 | Status = EFI_INVALID_PARAMETER;\r | |
72 | goto Error_Invalid_Params;\r | |
73 | }\r | |
74 | \r | |
75 | PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (This);\r | |
76 | \r | |
77 | if (PrivFsData->OpenFiles == 0) {\r | |
78 | //\r | |
79 | // There is no more open files. Read volume information again since it was\r | |
80 | // cleaned up on the last UdfClose() call.\r | |
81 | //\r | |
82 | Status = ReadUdfVolumeInformation (\r | |
83 | PrivFsData->BlockIo,\r | |
84 | PrivFsData->DiskIo,\r | |
85 | &PrivFsData->Volume\r | |
86 | );\r | |
87 | if (EFI_ERROR (Status)) {\r | |
88 | goto Error_Read_Udf_Volume;\r | |
89 | }\r | |
90 | }\r | |
91 | \r | |
92 | CleanupFileInformation (&PrivFsData->Root);\r | |
93 | \r | |
94 | //\r | |
95 | // Find root directory file.\r | |
96 | //\r | |
97 | Status = FindRootDirectory (\r | |
98 | PrivFsData->BlockIo,\r | |
99 | PrivFsData->DiskIo,\r | |
100 | &PrivFsData->Volume,\r | |
101 | &PrivFsData->Root\r | |
102 | );\r | |
103 | if (EFI_ERROR (Status)) {\r | |
104 | goto Error_Find_Root_Dir;\r | |
105 | }\r | |
106 | \r | |
107 | PrivFileData =\r | |
108 | (PRIVATE_UDF_FILE_DATA *) AllocateZeroPool (sizeof (PRIVATE_UDF_FILE_DATA));\r | |
109 | if (PrivFileData == NULL) {\r | |
110 | Status = EFI_OUT_OF_RESOURCES;\r | |
111 | goto Error_Alloc_Priv_File_Data;\r | |
112 | }\r | |
113 | \r | |
114 | PrivFileData->Signature = PRIVATE_UDF_FILE_DATA_SIGNATURE;\r | |
115 | PrivFileData->SimpleFs = This;\r | |
116 | PrivFileData->Root = &PrivFsData->Root;\r | |
117 | PrivFileData->IsRootDirectory = TRUE;\r | |
118 | \r | |
119 | CopyMem ((VOID *)&PrivFileData->FileIo, (VOID *)&gUdfFileIoOps,\r | |
120 | sizeof (EFI_FILE_PROTOCOL));\r | |
121 | \r | |
122 | *Root = &PrivFileData->FileIo;\r | |
123 | \r | |
124 | PrivFsData->OpenFiles++;\r | |
125 | \r | |
126 | gBS->RestoreTPL (OldTpl);\r | |
127 | \r | |
128 | return EFI_SUCCESS;\r | |
129 | \r | |
130 | Error_Alloc_Priv_File_Data:\r | |
131 | CleanupFileInformation (&PrivFsData->Root);\r | |
132 | \r | |
133 | Error_Find_Root_Dir:\r | |
134 | CleanupVolumeInformation (&PrivFsData->Volume);\r | |
135 | \r | |
136 | Error_Read_Udf_Volume:\r | |
137 | Error_Invalid_Params:\r | |
138 | gBS->RestoreTPL (OldTpl);\r | |
139 | \r | |
140 | return Status;\r | |
141 | }\r | |
142 | \r | |
143 | /**\r | |
144 | Opens a new file relative to the source file's location.\r | |
145 | \r | |
146 | @param This The protocol instance pointer.\r | |
147 | @param NewHandle Returns File Handle for FileName.\r | |
148 | @param FileName Null terminated string. "\", ".", and ".." are supported.\r | |
149 | @param OpenMode Open mode for file.\r | |
150 | @param Attributes Only used for EFI_FILE_MODE_CREATE.\r | |
151 | \r | |
152 | @retval EFI_SUCCESS The device was opened.\r | |
153 | @retval EFI_NOT_FOUND The specified file could not be found on the\r | |
154 | device.\r | |
155 | @retval EFI_NO_MEDIA The device has no media.\r | |
156 | @retval EFI_MEDIA_CHANGED The media has changed.\r | |
157 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
158 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
159 | @retval EFI_ACCESS_DENIED The service denied access to the file.\r | |
160 | @retval EFI_OUT_OF_RESOURCES The volume was not opened due to lack of\r | |
161 | resources.\r | |
162 | @retval EFI_VOLUME_FULL The volume is full.\r | |
163 | \r | |
164 | **/\r | |
165 | EFI_STATUS\r | |
166 | EFIAPI\r | |
167 | UdfOpen (\r | |
168 | IN EFI_FILE_PROTOCOL *This,\r | |
169 | OUT EFI_FILE_PROTOCOL **NewHandle,\r | |
170 | IN CHAR16 *FileName,\r | |
171 | IN UINT64 OpenMode,\r | |
172 | IN UINT64 Attributes\r | |
173 | )\r | |
174 | {\r | |
175 | EFI_TPL OldTpl;\r | |
176 | EFI_STATUS Status;\r | |
177 | PRIVATE_UDF_FILE_DATA *PrivFileData;\r | |
178 | PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;\r | |
179 | CHAR16 FilePath[UDF_PATH_LENGTH] = { 0 };\r | |
180 | UDF_FILE_INFO File;\r | |
181 | PRIVATE_UDF_FILE_DATA *NewPrivFileData;\r | |
182 | CHAR16 *TempFileName;\r | |
183 | \r | |
184 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
185 | \r | |
186 | if (This == NULL || NewHandle == NULL || FileName == NULL) {\r | |
187 | Status = EFI_INVALID_PARAMETER;\r | |
188 | goto Error_Invalid_Params;\r | |
189 | }\r | |
190 | \r | |
191 | if (OpenMode != EFI_FILE_MODE_READ) {\r | |
192 | Status = EFI_WRITE_PROTECTED;\r | |
193 | goto Error_Invalid_Params;\r | |
194 | }\r | |
195 | \r | |
196 | PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);\r | |
197 | \r | |
198 | PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (PrivFileData->SimpleFs);\r | |
199 | \r | |
200 | //\r | |
201 | // Build full path\r | |
202 | //\r | |
203 | if (*FileName == L'\\') {\r | |
204 | StrCpyS (FilePath, UDF_PATH_LENGTH, FileName);\r | |
205 | } else {\r | |
206 | StrCpyS (FilePath, UDF_PATH_LENGTH, PrivFileData->AbsoluteFileName);\r | |
207 | StrCatS (FilePath, UDF_PATH_LENGTH, L"\\");\r | |
208 | StrCatS (FilePath, UDF_PATH_LENGTH, FileName);\r | |
209 | }\r | |
210 | \r | |
211 | MangleFileName (FilePath);\r | |
212 | if (FilePath[0] == L'\0') {\r | |
213 | Status = EFI_NOT_FOUND;\r | |
214 | goto Error_Bad_FileName;\r | |
215 | }\r | |
216 | \r | |
217 | Status = FindFile (\r | |
218 | PrivFsData->BlockIo,\r | |
219 | PrivFsData->DiskIo,\r | |
220 | &PrivFsData->Volume,\r | |
221 | FilePath,\r | |
222 | _ROOT_FILE (PrivFileData),\r | |
223 | _PARENT_FILE (PrivFileData),\r | |
224 | &_PARENT_FILE(PrivFileData)->FileIdentifierDesc->Icb,\r | |
225 | &File\r | |
226 | );\r | |
227 | if (EFI_ERROR (Status)) {\r | |
228 | goto Error_Find_File;\r | |
229 | }\r | |
230 | \r | |
231 | NewPrivFileData =\r | |
232 | (PRIVATE_UDF_FILE_DATA *)AllocateZeroPool (sizeof (PRIVATE_UDF_FILE_DATA));\r | |
233 | if (NewPrivFileData == NULL) {\r | |
234 | Status = EFI_OUT_OF_RESOURCES;\r | |
235 | goto Error_Alloc_New_Priv_File_Data;\r | |
236 | }\r | |
237 | \r | |
238 | CopyMem ((VOID *)NewPrivFileData, (VOID *)PrivFileData,\r | |
239 | sizeof (PRIVATE_UDF_FILE_DATA));\r | |
240 | CopyMem ((VOID *)&NewPrivFileData->File, &File, sizeof (UDF_FILE_INFO));\r | |
241 | \r | |
242 | NewPrivFileData->IsRootDirectory = FALSE;\r | |
243 | \r | |
244 | StrCpyS (NewPrivFileData->AbsoluteFileName, UDF_PATH_LENGTH, FilePath);\r | |
245 | FileName = NewPrivFileData->AbsoluteFileName;\r | |
246 | \r | |
247 | while ((TempFileName = StrStr (FileName, L"\\")) != NULL) {\r | |
248 | FileName = TempFileName + 1;\r | |
249 | }\r | |
250 | \r | |
251 | StrCpyS (NewPrivFileData->FileName, UDF_PATH_LENGTH, FileName);\r | |
252 | \r | |
253 | Status = GetFileSize (\r | |
254 | PrivFsData->BlockIo,\r | |
255 | PrivFsData->DiskIo,\r | |
256 | &PrivFsData->Volume,\r | |
257 | &NewPrivFileData->File,\r | |
258 | &NewPrivFileData->FileSize\r | |
259 | );\r | |
260 | ASSERT_EFI_ERROR (Status);\r | |
261 | if (EFI_ERROR (Status)) {\r | |
262 | goto Error_Get_File_Size;\r | |
263 | }\r | |
264 | \r | |
265 | NewPrivFileData->FilePosition = 0;\r | |
266 | ZeroMem ((VOID *)&NewPrivFileData->ReadDirInfo,\r | |
267 | sizeof (UDF_READ_DIRECTORY_INFO));\r | |
268 | \r | |
269 | *NewHandle = &NewPrivFileData->FileIo;\r | |
270 | \r | |
271 | PrivFsData->OpenFiles++;\r | |
272 | \r | |
273 | gBS->RestoreTPL (OldTpl);\r | |
274 | \r | |
275 | return Status;\r | |
276 | \r | |
277 | Error_Get_File_Size:\r | |
278 | FreePool ((VOID *)NewPrivFileData);\r | |
279 | \r | |
280 | Error_Alloc_New_Priv_File_Data:\r | |
281 | CleanupFileInformation (&File);\r | |
282 | \r | |
283 | Error_Find_File:\r | |
284 | Error_Bad_FileName:\r | |
285 | Error_Invalid_Params:\r | |
286 | gBS->RestoreTPL (OldTpl);\r | |
287 | \r | |
288 | return Status;\r | |
289 | }\r | |
290 | \r | |
291 | /**\r | |
292 | Read data from the file.\r | |
293 | \r | |
294 | @param This Protocol instance pointer.\r | |
295 | @param BufferSize On input size of buffer, on output amount of data in\r | |
296 | buffer.\r | |
297 | @param Buffer The buffer in which data is read.\r | |
298 | \r | |
299 | @retval EFI_SUCCESS Data was read.\r | |
300 | @retval EFI_NO_MEDIA The device has no media.\r | |
301 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
302 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
303 | @retval EFI_BUFFER_TO_SMALL BufferSize is too small. BufferSize contains\r | |
304 | required size.\r | |
305 | \r | |
306 | **/\r | |
307 | EFI_STATUS\r | |
308 | EFIAPI\r | |
309 | UdfRead (\r | |
310 | IN EFI_FILE_PROTOCOL *This,\r | |
311 | IN OUT UINTN *BufferSize,\r | |
312 | OUT VOID *Buffer\r | |
313 | )\r | |
314 | {\r | |
315 | EFI_TPL OldTpl;\r | |
316 | EFI_STATUS Status;\r | |
317 | PRIVATE_UDF_FILE_DATA *PrivFileData;\r | |
318 | PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;\r | |
319 | UDF_VOLUME_INFO *Volume;\r | |
320 | UDF_FILE_INFO *Parent;\r | |
321 | UDF_READ_DIRECTORY_INFO *ReadDirInfo;\r | |
322 | EFI_BLOCK_IO_PROTOCOL *BlockIo;\r | |
323 | EFI_DISK_IO_PROTOCOL *DiskIo;\r | |
324 | UDF_FILE_INFO FoundFile;\r | |
325 | UDF_FILE_IDENTIFIER_DESCRIPTOR *NewFileIdentifierDesc;\r | |
326 | VOID *NewFileEntryData;\r | |
327 | CHAR16 FileName[UDF_FILENAME_LENGTH] = { 0 };\r | |
328 | UINT64 FileSize;\r | |
329 | UINT64 BufferSizeUint64;\r | |
330 | \r | |
331 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
332 | \r | |
333 | if (This == NULL || BufferSize == NULL || (*BufferSize != 0 &&\r | |
334 | Buffer == NULL)) {\r | |
335 | Status = EFI_INVALID_PARAMETER;\r | |
336 | goto Error_Invalid_Params;\r | |
337 | }\r | |
338 | \r | |
339 | PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);\r | |
340 | PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (PrivFileData->SimpleFs);\r | |
341 | \r | |
342 | BlockIo = PrivFsData->BlockIo;\r | |
343 | DiskIo = PrivFsData->DiskIo;\r | |
344 | Volume = &PrivFsData->Volume;\r | |
345 | ReadDirInfo = &PrivFileData->ReadDirInfo;\r | |
346 | NewFileIdentifierDesc = NULL;\r | |
347 | NewFileEntryData = NULL;\r | |
348 | \r | |
349 | Parent = _PARENT_FILE (PrivFileData);\r | |
350 | \r | |
351 | Status = EFI_VOLUME_CORRUPTED;\r | |
352 | \r | |
353 | if (IS_FID_NORMAL_FILE (Parent->FileIdentifierDesc)) {\r | |
354 | if (PrivFileData->FilePosition > PrivFileData->FileSize) {\r | |
355 | //\r | |
356 | // File's position is beyond the EOF\r | |
357 | //\r | |
358 | Status = EFI_DEVICE_ERROR;\r | |
359 | goto Error_File_Beyond_The_Eof;\r | |
360 | }\r | |
361 | \r | |
362 | if (PrivFileData->FilePosition == PrivFileData->FileSize) {\r | |
363 | *BufferSize = 0;\r | |
364 | Status = EFI_SUCCESS;\r | |
365 | goto Done;\r | |
366 | }\r | |
367 | \r | |
368 | BufferSizeUint64 = *BufferSize;\r | |
369 | \r | |
370 | Status = ReadFileData (\r | |
371 | BlockIo,\r | |
372 | DiskIo,\r | |
373 | Volume,\r | |
374 | Parent,\r | |
375 | PrivFileData->FileSize,\r | |
376 | &PrivFileData->FilePosition,\r | |
377 | Buffer,\r | |
378 | &BufferSizeUint64\r | |
379 | );\r | |
380 | ASSERT (BufferSizeUint64 <= MAX_UINTN);\r | |
381 | *BufferSize = (UINTN)BufferSizeUint64;\r | |
382 | } else if (IS_FID_DIRECTORY_FILE (Parent->FileIdentifierDesc)) {\r | |
383 | if (ReadDirInfo->FidOffset == 0 && PrivFileData->FilePosition > 0) {\r | |
384 | Status = EFI_DEVICE_ERROR;\r | |
385 | *BufferSize = 0;\r | |
386 | goto Done;\r | |
387 | }\r | |
388 | \r | |
389 | for (;;) {\r | |
390 | Status = ReadDirectoryEntry (\r | |
391 | BlockIo,\r | |
392 | DiskIo,\r | |
393 | Volume,\r | |
394 | &Parent->FileIdentifierDesc->Icb,\r | |
395 | Parent->FileEntry,\r | |
396 | ReadDirInfo,\r | |
397 | &NewFileIdentifierDesc\r | |
398 | );\r | |
399 | if (EFI_ERROR (Status)) {\r | |
400 | if (Status == EFI_DEVICE_ERROR) {\r | |
401 | FreePool (ReadDirInfo->DirectoryData);\r | |
402 | ZeroMem ((VOID *)ReadDirInfo, sizeof (UDF_READ_DIRECTORY_INFO));\r | |
403 | \r | |
404 | *BufferSize = 0;\r | |
405 | Status = EFI_SUCCESS;\r | |
406 | }\r | |
407 | \r | |
408 | goto Done;\r | |
409 | }\r | |
410 | \r | |
411 | if (!IS_FID_PARENT_FILE (NewFileIdentifierDesc)) {\r | |
412 | break;\r | |
413 | }\r | |
414 | \r | |
415 | FreePool ((VOID *)NewFileIdentifierDesc);\r | |
416 | }\r | |
417 | \r | |
418 | Status = FindFileEntry (\r | |
419 | BlockIo,\r | |
420 | DiskIo,\r | |
421 | Volume,\r | |
422 | &NewFileIdentifierDesc->Icb,\r | |
423 | &NewFileEntryData\r | |
424 | );\r | |
425 | if (EFI_ERROR (Status)) {\r | |
426 | goto Error_Find_Fe;\r | |
427 | }\r | |
428 | \r | |
429 | if (IS_FE_SYMLINK (NewFileEntryData)) {\r | |
430 | Status = ResolveSymlink (\r | |
431 | BlockIo,\r | |
432 | DiskIo,\r | |
433 | Volume,\r | |
434 | Parent,\r | |
435 | NewFileEntryData,\r | |
436 | &FoundFile\r | |
437 | );\r | |
438 | if (EFI_ERROR (Status)) {\r | |
439 | goto Error_Resolve_Symlink;\r | |
440 | }\r | |
441 | \r | |
442 | FreePool ((VOID *)NewFileEntryData);\r | |
443 | NewFileEntryData = FoundFile.FileEntry;\r | |
444 | \r | |
445 | Status = GetFileNameFromFid (NewFileIdentifierDesc, FileName);\r | |
446 | if (EFI_ERROR (Status)) {\r | |
447 | FreePool ((VOID *)FoundFile.FileIdentifierDesc);\r | |
448 | goto Error_Get_FileName;\r | |
449 | }\r | |
450 | \r | |
451 | FreePool ((VOID *)NewFileIdentifierDesc);\r | |
452 | NewFileIdentifierDesc = FoundFile.FileIdentifierDesc;\r | |
453 | } else {\r | |
454 | FoundFile.FileIdentifierDesc = NewFileIdentifierDesc;\r | |
455 | FoundFile.FileEntry = NewFileEntryData;\r | |
456 | \r | |
457 | Status = GetFileNameFromFid (FoundFile.FileIdentifierDesc, FileName);\r | |
458 | if (EFI_ERROR (Status)) {\r | |
459 | goto Error_Get_FileName;\r | |
460 | }\r | |
461 | }\r | |
462 | \r | |
463 | Status = GetFileSize (\r | |
464 | BlockIo,\r | |
465 | DiskIo,\r | |
466 | Volume,\r | |
467 | &FoundFile,\r | |
468 | &FileSize\r | |
469 | );\r | |
470 | if (EFI_ERROR (Status)) {\r | |
471 | goto Error_Get_File_Size;\r | |
472 | }\r | |
473 | \r | |
474 | Status = SetFileInfo (\r | |
475 | &FoundFile,\r | |
476 | FileSize,\r | |
477 | FileName,\r | |
478 | BufferSize,\r | |
479 | Buffer\r | |
480 | );\r | |
481 | if (EFI_ERROR (Status)) {\r | |
482 | goto Error_Set_File_Info;\r | |
483 | }\r | |
484 | \r | |
485 | PrivFileData->FilePosition++;\r | |
486 | Status = EFI_SUCCESS;\r | |
487 | } else if (IS_FID_DELETED_FILE (Parent->FileIdentifierDesc)) {\r | |
488 | Status = EFI_DEVICE_ERROR;\r | |
489 | }\r | |
490 | \r | |
491 | Error_Set_File_Info:\r | |
492 | Error_Get_File_Size:\r | |
493 | Error_Get_FileName:\r | |
494 | Error_Resolve_Symlink:\r | |
495 | if (NewFileEntryData != NULL) {\r | |
496 | FreePool (NewFileEntryData);\r | |
497 | }\r | |
498 | \r | |
499 | Error_Find_Fe:\r | |
500 | if (NewFileIdentifierDesc != NULL) {\r | |
501 | FreePool ((VOID *)NewFileIdentifierDesc);\r | |
502 | }\r | |
503 | \r | |
504 | Done:\r | |
505 | Error_File_Beyond_The_Eof:\r | |
506 | Error_Invalid_Params:\r | |
507 | gBS->RestoreTPL (OldTpl);\r | |
508 | \r | |
509 | return Status;\r | |
510 | }\r | |
511 | \r | |
512 | /**\r | |
513 | Close the file handle.\r | |
514 | \r | |
515 | @param This Protocol instance pointer.\r | |
516 | \r | |
517 | @retval EFI_SUCCESS The file was closed.\r | |
518 | \r | |
519 | **/\r | |
520 | EFI_STATUS\r | |
521 | EFIAPI\r | |
522 | UdfClose (\r | |
523 | IN EFI_FILE_PROTOCOL *This\r | |
524 | )\r | |
525 | {\r | |
526 | EFI_TPL OldTpl;\r | |
527 | EFI_STATUS Status;\r | |
528 | PRIVATE_UDF_FILE_DATA *PrivFileData;\r | |
529 | PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;\r | |
530 | \r | |
531 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
532 | \r | |
533 | Status = EFI_SUCCESS;\r | |
534 | \r | |
535 | if (This == NULL) {\r | |
536 | Status = EFI_INVALID_PARAMETER;\r | |
537 | goto Exit;\r | |
538 | }\r | |
539 | \r | |
540 | PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);\r | |
541 | \r | |
542 | PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (PrivFileData->SimpleFs);\r | |
543 | \r | |
544 | if (!PrivFileData->IsRootDirectory) {\r | |
545 | CleanupFileInformation (&PrivFileData->File);\r | |
546 | \r | |
547 | if (PrivFileData->ReadDirInfo.DirectoryData != NULL) {\r | |
548 | FreePool (PrivFileData->ReadDirInfo.DirectoryData);\r | |
549 | }\r | |
550 | }\r | |
551 | \r | |
552 | if (--PrivFsData->OpenFiles == 0) {\r | |
553 | CleanupVolumeInformation (&PrivFsData->Volume);\r | |
554 | }\r | |
555 | \r | |
556 | FreePool ((VOID *)PrivFileData);\r | |
557 | \r | |
558 | Exit:\r | |
559 | gBS->RestoreTPL (OldTpl);\r | |
560 | \r | |
561 | return Status;\r | |
562 | }\r | |
563 | \r | |
564 | /**\r | |
565 | Close and delete the file handle.\r | |
566 | \r | |
567 | @param This Protocol instance pointer.\r | |
568 | \r | |
569 | @retval EFI_SUCCESS The file was closed and deleted.\r | |
570 | @retval EFI_WARN_DELETE_FAILURE The handle was closed but the file was not\r | |
571 | deleted.\r | |
572 | \r | |
573 | **/\r | |
574 | EFI_STATUS\r | |
575 | EFIAPI\r | |
576 | UdfDelete (\r | |
577 | IN EFI_FILE_PROTOCOL *This\r | |
578 | )\r | |
579 | {\r | |
580 | PRIVATE_UDF_FILE_DATA *PrivFileData;\r | |
581 | \r | |
582 | if (This == NULL) {\r | |
583 | return EFI_INVALID_PARAMETER;\r | |
584 | }\r | |
585 | \r | |
586 | PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);\r | |
587 | \r | |
588 | (VOID)PrivFileData->FileIo.Close(This);\r | |
589 | \r | |
590 | return EFI_WARN_DELETE_FAILURE;\r | |
591 | }\r | |
592 | \r | |
593 | /**\r | |
594 | Write data to a file.\r | |
595 | \r | |
596 | @param This Protocol instance pointer.\r | |
597 | @param BufferSize On input size of buffer, on output amount of data in\r | |
598 | buffer.\r | |
599 | @param Buffer The buffer in which data to write.\r | |
600 | \r | |
601 | @retval EFI_SUCCESS Data was written.\r | |
602 | @retval EFI_UNSUPPORTED Writes to Open directory are not supported.\r | |
603 | @retval EFI_NO_MEDIA The device has no media.\r | |
604 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
605 | @retval EFI_DEVICE_ERROR An attempt was made to write to a deleted file.\r | |
606 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
607 | @retval EFI_WRITE_PROTECTED The device is write protected.\r | |
608 | @retval EFI_ACCESS_DENIED The file was open for read only.\r | |
609 | @retval EFI_VOLUME_FULL The volume is full.\r | |
610 | \r | |
611 | **/\r | |
612 | EFI_STATUS\r | |
613 | EFIAPI\r | |
614 | UdfWrite (\r | |
615 | IN EFI_FILE_PROTOCOL *This,\r | |
616 | IN OUT UINTN *BufferSize,\r | |
617 | IN VOID *Buffer\r | |
618 | )\r | |
619 | {\r | |
620 | return EFI_UNSUPPORTED;\r | |
621 | }\r | |
622 | \r | |
623 | /**\r | |
624 | Get file's current position.\r | |
625 | \r | |
626 | @param This Protocol instance pointer.\r | |
627 | @param Position Byte position from the start of the file.\r | |
628 | \r | |
629 | @retval EFI_SUCCESS Position was updated.\r | |
630 | @retval EFI_UNSUPPORTED Seek request for directories is not valid.\r | |
631 | \r | |
632 | **/\r | |
633 | EFI_STATUS\r | |
634 | EFIAPI\r | |
635 | UdfGetPosition (\r | |
636 | IN EFI_FILE_PROTOCOL *This,\r | |
637 | OUT UINT64 *Position\r | |
638 | )\r | |
639 | {\r | |
640 | PRIVATE_UDF_FILE_DATA *PrivFileData;\r | |
641 | \r | |
642 | if (This == NULL || Position == NULL) {\r | |
643 | return EFI_INVALID_PARAMETER;\r | |
644 | }\r | |
645 | \r | |
646 | PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);\r | |
647 | \r | |
648 | //\r | |
649 | // As per UEFI spec, if the file handle is a directory, then the current file\r | |
650 | // position has no meaning and the operation is not supported.\r | |
651 | //\r | |
652 | if (IS_FID_DIRECTORY_FILE (&PrivFileData->File.FileIdentifierDesc)) {\r | |
653 | return EFI_UNSUPPORTED;\r | |
654 | }\r | |
655 | \r | |
656 | //\r | |
657 | // The file is not a directory. So, return its position.\r | |
658 | //\r | |
659 | *Position = PrivFileData->FilePosition;\r | |
660 | \r | |
661 | return EFI_SUCCESS;\r | |
662 | }\r | |
663 | \r | |
664 | /**\r | |
665 | Set file's current position.\r | |
666 | \r | |
667 | @param This Protocol instance pointer.\r | |
668 | @param Position Byte position from the start of the file.\r | |
669 | \r | |
670 | @retval EFI_SUCCESS Position was updated.\r | |
671 | @retval EFI_UNSUPPORTED Seek request for non-zero is not valid on open.\r | |
672 | \r | |
673 | **/\r | |
674 | EFI_STATUS\r | |
675 | EFIAPI\r | |
676 | UdfSetPosition (\r | |
677 | IN EFI_FILE_PROTOCOL *This,\r | |
678 | IN UINT64 Position\r | |
679 | )\r | |
680 | {\r | |
681 | EFI_STATUS Status;\r | |
682 | PRIVATE_UDF_FILE_DATA *PrivFileData;\r | |
683 | UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc;\r | |
684 | \r | |
685 | if (This == NULL) {\r | |
686 | return EFI_INVALID_PARAMETER;\r | |
687 | }\r | |
688 | \r | |
689 | Status = EFI_UNSUPPORTED;\r | |
690 | \r | |
691 | PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);\r | |
692 | \r | |
693 | FileIdentifierDesc = PrivFileData->File.FileIdentifierDesc;\r | |
694 | if (IS_FID_DIRECTORY_FILE (FileIdentifierDesc)) {\r | |
695 | //\r | |
696 | // If the file handle is a directory, the _only_ position that may be set is\r | |
697 | // zero. This has no effect of starting the read proccess of the directory\r | |
698 | // entries over.\r | |
699 | //\r | |
700 | if (Position == 0) {\r | |
701 | PrivFileData->FilePosition = Position;\r | |
702 | PrivFileData->ReadDirInfo.FidOffset = 0;\r | |
703 | Status = EFI_SUCCESS;\r | |
704 | }\r | |
705 | } else if (IS_FID_NORMAL_FILE (FileIdentifierDesc)) {\r | |
706 | //\r | |
707 | // Seeking to position 0xFFFFFFFFFFFFFFFF causes the current position to be\r | |
708 | // set to the EOF.\r | |
709 | //\r | |
710 | if (Position == 0xFFFFFFFFFFFFFFFF) {\r | |
711 | PrivFileData->FilePosition = PrivFileData->FileSize - 1;\r | |
712 | } else {\r | |
713 | PrivFileData->FilePosition = Position;\r | |
714 | }\r | |
715 | \r | |
716 | Status = EFI_SUCCESS;\r | |
717 | }\r | |
718 | \r | |
719 | return Status;\r | |
720 | }\r | |
721 | \r | |
722 | /**\r | |
723 | Get information about a file.\r | |
724 | \r | |
725 | @param This Protocol instance pointer.\r | |
726 | @param InformationType Type of information to return in Buffer.\r | |
727 | @param BufferSize On input size of buffer, on output amount of data in\r | |
728 | buffer.\r | |
729 | @param Buffer The buffer to return data.\r | |
730 | \r | |
731 | @retval EFI_SUCCESS Data was returned.\r | |
732 | @retval EFI_UNSUPPORTED InformationType is not supported.\r | |
733 | @retval EFI_NO_MEDIA The device has no media.\r | |
734 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
735 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
736 | @retval EFI_WRITE_PROTECTED The device is write protected.\r | |
737 | @retval EFI_ACCESS_DENIED The file was open for read only.\r | |
738 | @retval EFI_BUFFER_TOO_SMALL Buffer was too small; required size returned in\r | |
739 | BufferSize.\r | |
740 | \r | |
741 | **/\r | |
742 | EFI_STATUS\r | |
743 | EFIAPI\r | |
744 | UdfGetInfo (\r | |
745 | IN EFI_FILE_PROTOCOL *This,\r | |
746 | IN EFI_GUID *InformationType,\r | |
747 | IN OUT UINTN *BufferSize,\r | |
748 | OUT VOID *Buffer\r | |
749 | )\r | |
750 | {\r | |
751 | EFI_STATUS Status;\r | |
752 | PRIVATE_UDF_FILE_DATA *PrivFileData;\r | |
753 | PRIVATE_UDF_SIMPLE_FS_DATA *PrivFsData;\r | |
754 | EFI_FILE_SYSTEM_INFO *FileSystemInfo;\r | |
755 | UINTN FileSystemInfoLength;\r | |
756 | CHAR16 *String;\r | |
757 | UDF_FILE_SET_DESCRIPTOR *FileSetDesc;\r | |
758 | UINTN Index;\r | |
759 | UINT8 *OstaCompressed;\r | |
760 | UINT8 CompressionId;\r | |
761 | UINT64 VolumeSize;\r | |
762 | UINT64 FreeSpaceSize;\r | |
763 | CHAR16 VolumeLabel[64];\r | |
764 | \r | |
765 | if (This == NULL || InformationType == NULL || BufferSize == NULL ||\r | |
766 | (*BufferSize != 0 && Buffer == NULL)) {\r | |
767 | return EFI_INVALID_PARAMETER;\r | |
768 | }\r | |
769 | \r | |
770 | PrivFileData = PRIVATE_UDF_FILE_DATA_FROM_THIS (This);\r | |
771 | \r | |
772 | PrivFsData = PRIVATE_UDF_SIMPLE_FS_DATA_FROM_THIS (PrivFileData->SimpleFs);\r | |
773 | \r | |
774 | Status = EFI_UNSUPPORTED;\r | |
775 | \r | |
776 | if (CompareGuid (InformationType, &gEfiFileInfoGuid)) {\r | |
777 | Status = SetFileInfo (\r | |
778 | _FILE (PrivFileData),\r | |
779 | PrivFileData->FileSize,\r | |
780 | PrivFileData->FileName,\r | |
781 | BufferSize,\r | |
782 | Buffer\r | |
783 | );\r | |
784 | } else if (CompareGuid (InformationType, &gEfiFileSystemInfoGuid)) {\r | |
785 | String = VolumeLabel;\r | |
786 | \r | |
787 | FileSetDesc = PrivFsData->Volume.FileSetDescs[0];\r | |
788 | \r | |
789 | OstaCompressed = &FileSetDesc->LogicalVolumeIdentifier[0];\r | |
790 | \r | |
791 | CompressionId = OstaCompressed[0];\r | |
792 | if (!IS_VALID_COMPRESSION_ID (CompressionId)) {\r | |
793 | return EFI_VOLUME_CORRUPTED;\r | |
794 | }\r | |
795 | \r | |
796 | for (Index = 1; Index < 128; Index++) {\r | |
797 | if (CompressionId == 16) {\r | |
798 | *String = *(UINT8 *)(OstaCompressed + Index) << 8;\r | |
799 | Index++;\r | |
800 | } else {\r | |
801 | *String = 0;\r | |
802 | }\r | |
803 | \r | |
804 | if (Index < 128) {\r | |
805 | *String |= *(UINT8 *)(OstaCompressed + Index);\r | |
806 | }\r | |
807 | \r | |
808 | //\r | |
809 | // Unlike FID Identifiers, Logical Volume Identifier is stored in a\r | |
810 | // NULL-terminated OSTA compressed format, so we must check for the NULL\r | |
811 | // character.\r | |
812 | //\r | |
813 | if (*String == L'\0') {\r | |
814 | break;\r | |
815 | }\r | |
816 | \r | |
817 | String++;\r | |
818 | }\r | |
819 | \r | |
820 | *String = L'\0';\r | |
821 | \r | |
822 | FileSystemInfoLength = StrSize (VolumeLabel) +\r | |
823 | sizeof (EFI_FILE_SYSTEM_INFO);\r | |
824 | if (*BufferSize < FileSystemInfoLength) {\r | |
825 | *BufferSize = FileSystemInfoLength;\r | |
826 | return EFI_BUFFER_TOO_SMALL;\r | |
827 | }\r | |
828 | \r | |
829 | FileSystemInfo = (EFI_FILE_SYSTEM_INFO *)Buffer;\r | |
830 | StrCpyS (FileSystemInfo->VolumeLabel, ARRAY_SIZE (VolumeLabel),\r | |
831 | VolumeLabel);\r | |
832 | Status = GetVolumeSize (\r | |
833 | PrivFsData->BlockIo,\r | |
834 | PrivFsData->DiskIo,\r | |
835 | &PrivFsData->Volume,\r | |
836 | &VolumeSize,\r | |
837 | &FreeSpaceSize\r | |
838 | );\r | |
839 | if (EFI_ERROR (Status)) {\r | |
840 | return Status;\r | |
841 | }\r | |
842 | \r | |
843 | FileSystemInfo->Size = FileSystemInfoLength;\r | |
844 | FileSystemInfo->ReadOnly = TRUE;\r | |
845 | FileSystemInfo->BlockSize =\r | |
846 | LV_BLOCK_SIZE (&PrivFsData->Volume, UDF_DEFAULT_LV_NUM);\r | |
847 | FileSystemInfo->VolumeSize = VolumeSize;\r | |
848 | FileSystemInfo->FreeSpace = FreeSpaceSize;\r | |
849 | \r | |
850 | *BufferSize = FileSystemInfoLength;\r | |
851 | Status = EFI_SUCCESS;\r | |
852 | }\r | |
853 | \r | |
854 | return Status;\r | |
855 | }\r | |
856 | \r | |
857 | /**\r | |
858 | Set information about a file.\r | |
859 | \r | |
860 | @param File Protocol instance pointer.\r | |
861 | @param InformationType Type of information in Buffer.\r | |
862 | @param BufferSize Size of buffer.\r | |
863 | @param Buffer The data to write.\r | |
864 | \r | |
865 | @retval EFI_SUCCESS Data was set.\r | |
866 | @retval EFI_UNSUPPORTED InformationType is not supported.\r | |
867 | @retval EFI_NO_MEDIA The device has no media.\r | |
868 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
869 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
870 | @retval EFI_WRITE_PROTECTED The device is write protected.\r | |
871 | @retval EFI_ACCESS_DENIED The file was open for read only.\r | |
872 | \r | |
873 | **/\r | |
874 | EFI_STATUS\r | |
875 | EFIAPI\r | |
876 | UdfSetInfo (\r | |
877 | IN EFI_FILE_PROTOCOL *This,\r | |
878 | IN EFI_GUID *InformationType,\r | |
879 | IN UINTN BufferSize,\r | |
880 | IN VOID *Buffer\r | |
881 | )\r | |
882 | {\r | |
883 | return EFI_WRITE_PROTECTED;\r | |
884 | }\r | |
885 | \r | |
886 | /**\r | |
887 | Flush data back for the file handle.\r | |
888 | \r | |
889 | @param This Protocol instance pointer.\r | |
890 | \r | |
891 | @retval EFI_SUCCESS Data was flushed.\r | |
892 | @retval EFI_UNSUPPORTED Writes to Open directory are not supported.\r | |
893 | @retval EFI_NO_MEDIA The device has no media.\r | |
894 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
895 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
896 | @retval EFI_WRITE_PROTECTED The device is write protected.\r | |
897 | @retval EFI_ACCESS_DENIED The file was open for read only.\r | |
898 | @retval EFI_VOLUME_FULL The volume is full.\r | |
899 | \r | |
900 | **/\r | |
901 | EFI_STATUS\r | |
902 | EFIAPI\r | |
903 | UdfFlush (\r | |
904 | IN EFI_FILE_PROTOCOL *This\r | |
905 | )\r | |
906 | {\r | |
907 | return EFI_WRITE_PROTECTED;\r | |
908 | }\r |