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99c9b949 PA |
1 | /** @file\r |
2 | Handle on-disk format and volume structures in 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 | |
3f92b104 HW |
17 | //\r |
18 | // Vendor-Defined Device Path GUID for UDF file system\r | |
19 | //\r | |
20 | EFI_GUID gUdfDevPathGuid = EFI_UDF_DEVICE_PATH_GUID;\r | |
21 | \r | |
077f8c43 HW |
22 | /**\r |
23 | Find the anchor volume descriptor pointer.\r | |
24 | \r | |
25 | @param[in] BlockIo BlockIo interface.\r | |
26 | @param[in] DiskIo DiskIo interface.\r | |
27 | @param[out] AnchorPoint Anchor volume descriptor pointer.\r | |
28 | \r | |
29 | @retval EFI_SUCCESS Anchor volume descriptor pointer found.\r | |
30 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
31 | @retval other Anchor volume descriptor pointer not found.\r | |
32 | \r | |
33 | **/\r | |
99c9b949 PA |
34 | EFI_STATUS\r |
35 | FindAnchorVolumeDescriptorPointer (\r | |
36 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
37 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
38 | OUT UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER *AnchorPoint\r | |
39 | )\r | |
40 | {\r | |
baaa3cee PA |
41 | EFI_STATUS Status;\r |
42 | UINT32 BlockSize;\r | |
43 | EFI_LBA EndLBA;\r | |
44 | EFI_LBA DescriptorLBAs[4];\r | |
45 | UINTN Index;\r | |
46 | UDF_DESCRIPTOR_TAG *DescriptorTag;\r | |
99c9b949 | 47 | \r |
b434f753 BD |
48 | BlockSize = BlockIo->Media->BlockSize;\r |
49 | EndLBA = BlockIo->Media->LastBlock;\r | |
50 | DescriptorLBAs[0] = 256;\r | |
51 | DescriptorLBAs[1] = EndLBA - 256;\r | |
52 | DescriptorLBAs[2] = EndLBA;\r | |
53 | DescriptorLBAs[3] = 512;\r | |
54 | \r | |
99c9b949 PA |
55 | for (Index = 0; Index < ARRAY_SIZE (DescriptorLBAs); Index++) {\r |
56 | Status = DiskIo->ReadDisk (\r | |
57 | DiskIo,\r | |
58 | BlockIo->Media->MediaId,\r | |
59 | MultU64x32 (DescriptorLBAs[Index], BlockSize),\r | |
60 | sizeof (UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER),\r | |
61 | (VOID *)AnchorPoint\r | |
62 | );\r | |
63 | if (EFI_ERROR (Status)) {\r | |
64 | return Status;\r | |
65 | }\r | |
baaa3cee PA |
66 | \r |
67 | DescriptorTag = &AnchorPoint->DescriptorTag;\r | |
68 | \r | |
99c9b949 PA |
69 | //\r |
70 | // Check if read LBA has a valid AVDP descriptor.\r | |
71 | //\r | |
baaa3cee | 72 | if (DescriptorTag->TagIdentifier == UdfAnchorVolumeDescriptorPointer) {\r |
99c9b949 PA |
73 | return EFI_SUCCESS;\r |
74 | }\r | |
75 | }\r | |
76 | //\r | |
77 | // No AVDP found.\r | |
78 | //\r | |
79 | return EFI_VOLUME_CORRUPTED;\r | |
80 | }\r | |
81 | \r | |
077f8c43 HW |
82 | /**\r |
83 | Save the content of Logical Volume Descriptors and Partitions Descriptors in\r | |
84 | memory.\r | |
85 | \r | |
86 | @param[in] BlockIo BlockIo interface.\r | |
87 | @param[in] DiskIo DiskIo interface.\r | |
88 | @param[in] AnchorPoint Anchor volume descriptor pointer.\r | |
89 | @param[out] Volume UDF volume information structure.\r | |
90 | \r | |
91 | @retval EFI_SUCCESS The descriptors were saved.\r | |
92 | @retval EFI_OUT_OF_RESOURCES The descriptors were not saved due to lack of\r | |
93 | resources.\r | |
94 | @retval other The descriptors were not saved due to\r | |
95 | ReadDisk error.\r | |
96 | \r | |
97 | **/\r | |
99c9b949 PA |
98 | EFI_STATUS\r |
99 | StartMainVolumeDescriptorSequence (\r | |
100 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
101 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
102 | IN UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER *AnchorPoint,\r | |
103 | OUT UDF_VOLUME_INFO *Volume\r | |
104 | )\r | |
105 | {\r | |
baaa3cee PA |
106 | EFI_STATUS Status;\r |
107 | UINT32 BlockSize;\r | |
108 | UDF_EXTENT_AD *ExtentAd;\r | |
109 | EFI_LBA SeqStartBlock;\r | |
110 | EFI_LBA SeqEndBlock;\r | |
111 | BOOLEAN StopSequence;\r | |
112 | VOID *Buffer;\r | |
113 | UDF_DESCRIPTOR_TAG *DescriptorTag;\r | |
114 | UINT32 LogicalBlockSize;\r | |
115 | \r | |
116 | BlockSize = BlockIo->Media->BlockSize;\r | |
117 | ExtentAd = &AnchorPoint->MainVolumeDescriptorSequenceExtent;\r | |
99c9b949 PA |
118 | \r |
119 | //\r | |
baaa3cee | 120 | // Allocate buffer for reading disk blocks\r |
99c9b949 | 121 | //\r |
baaa3cee | 122 | Buffer = AllocateZeroPool ((UINTN)BlockSize);\r |
99c9b949 | 123 | if (Buffer == NULL) {\r |
baaa3cee | 124 | return EFI_OUT_OF_RESOURCES;\r |
99c9b949 PA |
125 | }\r |
126 | \r | |
baaa3cee PA |
127 | //\r |
128 | // The logical partition created by Partition driver is relative to the main\r | |
129 | // VDS extent location, so we start the Main Volume Descriptor Sequence at\r | |
130 | // LBA 0.\r | |
131 | //\r | |
132 | // We don't need to check again if we have valid Volume Descriptors here since\r | |
133 | // Partition driver already did.\r | |
134 | //\r | |
135 | SeqStartBlock = 0;\r | |
136 | SeqEndBlock = SeqStartBlock + DivU64x32 ((UINT64)ExtentAd->ExtentLength,\r | |
137 | BlockSize);\r | |
138 | StopSequence = FALSE;\r | |
139 | for (; SeqStartBlock < SeqEndBlock && !StopSequence; SeqStartBlock++) {\r | |
140 | //\r | |
141 | // Read disk block\r | |
142 | //\r | |
143 | Status = BlockIo->ReadBlocks (\r | |
144 | BlockIo,\r | |
99c9b949 | 145 | BlockIo->Media->MediaId,\r |
baaa3cee | 146 | SeqStartBlock,\r |
99c9b949 PA |
147 | BlockSize,\r |
148 | Buffer\r | |
149 | );\r | |
150 | if (EFI_ERROR (Status)) {\r | |
baaa3cee | 151 | goto Out_Free;\r |
99c9b949 PA |
152 | }\r |
153 | \r | |
baaa3cee PA |
154 | DescriptorTag = Buffer;\r |
155 | \r | |
156 | switch (DescriptorTag->TagIdentifier) {\r | |
157 | case UdfPartitionDescriptor:\r | |
99c9b949 | 158 | //\r |
baaa3cee | 159 | // Save Partition Descriptor\r |
99c9b949 | 160 | //\r |
baaa3cee | 161 | CopyMem (&Volume->PartitionDesc, Buffer, sizeof (Volume->PartitionDesc));\r |
99c9b949 | 162 | break;\r |
99c9b949 | 163 | \r |
baaa3cee | 164 | case UdfLogicalVolumeDescriptor:\r |
99c9b949 | 165 | //\r |
baaa3cee | 166 | // Save Logical Volume Descriptor\r |
99c9b949 | 167 | //\r |
baaa3cee PA |
168 | CopyMem (&Volume->LogicalVolDesc, Buffer, sizeof (Volume->LogicalVolDesc));\r |
169 | break;\r | |
99c9b949 | 170 | \r |
baaa3cee PA |
171 | case UdfTerminatingDescriptor:\r |
172 | StopSequence = TRUE;\r | |
173 | break;\r | |
99c9b949 | 174 | \r |
baaa3cee PA |
175 | default:\r |
176 | ;\r | |
99c9b949 | 177 | }\r |
99c9b949 PA |
178 | }\r |
179 | \r | |
180 | //\r | |
baaa3cee | 181 | // Determine FE (File Entry) size\r |
99c9b949 | 182 | //\r |
baaa3cee | 183 | LogicalBlockSize = Volume->LogicalVolDesc.LogicalBlockSize;\r |
99c9b949 | 184 | if (LogicalBlockSize >= UDF_LOGICAL_SECTOR_SIZE) {\r |
baaa3cee | 185 | Volume->FileEntrySize = (UINTN)LogicalBlockSize;\r |
99c9b949 PA |
186 | } else {\r |
187 | Volume->FileEntrySize = UDF_LOGICAL_SECTOR_SIZE;\r | |
188 | }\r | |
189 | \r | |
baaa3cee | 190 | Status = EFI_SUCCESS;\r |
99c9b949 | 191 | \r |
baaa3cee PA |
192 | Out_Free:\r |
193 | //\r | |
194 | // Free block read buffer\r | |
195 | //\r | |
99c9b949 PA |
196 | FreePool (Buffer);\r |
197 | \r | |
99c9b949 PA |
198 | return Status;\r |
199 | }\r | |
200 | \r | |
077f8c43 HW |
201 | /**\r |
202 | Return a Partition Descriptor given a Long Allocation Descriptor. This is\r | |
203 | necessary to calculate the right extent (LongAd) offset which is added up\r | |
204 | with partition's starting location.\r | |
205 | \r | |
206 | @param[in] Volume Volume information pointer.\r | |
207 | @param[in] LongAd Long Allocation Descriptor pointer.\r | |
208 | \r | |
209 | @return A pointer to a Partition Descriptor.\r | |
210 | \r | |
211 | **/\r | |
99c9b949 PA |
212 | UDF_PARTITION_DESCRIPTOR *\r |
213 | GetPdFromLongAd (\r | |
214 | IN UDF_VOLUME_INFO *Volume,\r | |
215 | IN UDF_LONG_ALLOCATION_DESCRIPTOR *LongAd\r | |
216 | )\r | |
217 | {\r | |
218 | UDF_LOGICAL_VOLUME_DESCRIPTOR *LogicalVolDesc;\r | |
99c9b949 PA |
219 | UINT16 PartitionNum;\r |
220 | \r | |
baaa3cee | 221 | LogicalVolDesc = &Volume->LogicalVolDesc;\r |
99c9b949 | 222 | \r |
baaa3cee | 223 | switch (LogicalVolDesc->DomainIdentifier.Suffix.Domain.UdfRevision) {\r |
99c9b949 | 224 | case 0x0102:\r |
baaa3cee PA |
225 | case 0x0150:\r |
226 | case 0x0200:\r | |
227 | case 0x0201:\r | |
228 | case 0x0250:\r | |
229 | case 0x0260:\r | |
99c9b949 | 230 | //\r |
baaa3cee | 231 | // UDF 1.02 specification:\r |
99c9b949 PA |
232 | //\r |
233 | // There shall be exactly one prevailing Logical Volume Descriptor recorded\r | |
234 | // per Volume Set. The Partition Maps field shall contain only Type 1\r | |
235 | // Partition Maps.\r | |
236 | //\r | |
baaa3cee | 237 | // UDF 1.50 through 2.60 specs say:\r |
99c9b949 | 238 | //\r |
baaa3cee PA |
239 | // For the purpose of interchange partition maps shall be limited to\r |
240 | // Partition Map type 1, except type 2 maps as described in the document.\r | |
241 | //\r | |
242 | // NOTE: Only one Type 1 (Physical) Partition is supported. It has been\r | |
243 | // checked already in Partition driver for existence of a single Type 1\r | |
244 | // Partition map, so we don't have to double check here.\r | |
245 | //\r | |
246 | // Partition reference number can also be retrieved from\r | |
247 | // LongAd->ExtentLocation.PartitionReferenceNumber, however the spec says\r | |
248 | // it may be 0, so let's not rely on it.\r | |
99c9b949 | 249 | //\r |
99c9b949 PA |
250 | PartitionNum = *(UINT16 *)((UINTN)&LogicalVolDesc->PartitionMaps[4]);\r |
251 | break;\r | |
baaa3cee PA |
252 | \r |
253 | default:\r | |
99c9b949 | 254 | //\r |
baaa3cee | 255 | // Unsupported UDF revision\r |
99c9b949 | 256 | //\r |
baaa3cee | 257 | return NULL;\r |
99c9b949 PA |
258 | }\r |
259 | \r | |
baaa3cee PA |
260 | //\r |
261 | // Check if partition number matches Partition Descriptor found in Main Volume\r | |
262 | // Descriptor Sequence.\r | |
263 | //\r | |
264 | if (Volume->PartitionDesc.PartitionNumber == PartitionNum) {\r | |
265 | return &Volume->PartitionDesc;\r | |
99c9b949 PA |
266 | }\r |
267 | \r | |
268 | return NULL;\r | |
269 | }\r | |
270 | \r | |
077f8c43 HW |
271 | /**\r |
272 | Return logical sector number of a given Long Allocation Descriptor.\r | |
273 | \r | |
274 | @param[in] Volume Volume information pointer.\r | |
275 | @param[in] LongAd Long Allocation Descriptor pointer.\r | |
276 | \r | |
277 | @return The logical sector number of a given Long Allocation Descriptor.\r | |
278 | \r | |
279 | **/\r | |
99c9b949 PA |
280 | UINT64\r |
281 | GetLongAdLsn (\r | |
282 | IN UDF_VOLUME_INFO *Volume,\r | |
283 | IN UDF_LONG_ALLOCATION_DESCRIPTOR *LongAd\r | |
284 | )\r | |
285 | {\r | |
286 | UDF_PARTITION_DESCRIPTOR *PartitionDesc;\r | |
287 | \r | |
288 | PartitionDesc = GetPdFromLongAd (Volume, LongAd);\r | |
289 | ASSERT (PartitionDesc != NULL);\r | |
290 | \r | |
baaa3cee PA |
291 | return (UINT64)PartitionDesc->PartitionStartingLocation -\r |
292 | Volume->MainVdsStartLocation +\r | |
293 | LongAd->ExtentLocation.LogicalBlockNumber;\r | |
99c9b949 PA |
294 | }\r |
295 | \r | |
077f8c43 HW |
296 | /**\r |
297 | Return logical sector number of a given Short Allocation Descriptor.\r | |
298 | \r | |
baaa3cee | 299 | @param[in] Volume Volume pointer.\r |
077f8c43 HW |
300 | @param[in] PartitionDesc Partition Descriptor pointer.\r |
301 | @param[in] ShortAd Short Allocation Descriptor pointer.\r | |
302 | \r | |
303 | @return The logical sector number of a given Short Allocation Descriptor.\r | |
304 | \r | |
305 | **/\r | |
99c9b949 PA |
306 | UINT64\r |
307 | GetShortAdLsn (\r | |
baaa3cee | 308 | IN UDF_VOLUME_INFO *Volume,\r |
99c9b949 PA |
309 | IN UDF_PARTITION_DESCRIPTOR *PartitionDesc,\r |
310 | IN UDF_SHORT_ALLOCATION_DESCRIPTOR *ShortAd\r | |
311 | )\r | |
312 | {\r | |
baaa3cee PA |
313 | return (UINT64)PartitionDesc->PartitionStartingLocation -\r |
314 | Volume->MainVdsStartLocation + ShortAd->ExtentPosition;\r | |
99c9b949 PA |
315 | }\r |
316 | \r | |
077f8c43 HW |
317 | /**\r |
318 | Find File Set Descriptor of a given Logical Volume Descriptor.\r | |
319 | \r | |
320 | The found FSD will contain the extent (LogicalVolumeContentsUse) where our\r | |
321 | root directory is.\r | |
322 | \r | |
323 | @param[in] BlockIo BlockIo interface.\r | |
324 | @param[in] DiskIo DiskIo interface.\r | |
325 | @param[in] Volume Volume information pointer.\r | |
077f8c43 HW |
326 | \r |
327 | @retval EFI_SUCCESS File Set Descriptor pointer found.\r | |
328 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
329 | @retval other File Set Descriptor pointer not found.\r | |
330 | \r | |
331 | **/\r | |
99c9b949 PA |
332 | EFI_STATUS\r |
333 | FindFileSetDescriptor (\r | |
334 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
335 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
baaa3cee | 336 | IN UDF_VOLUME_INFO *Volume\r |
99c9b949 PA |
337 | )\r |
338 | {\r | |
339 | EFI_STATUS Status;\r | |
340 | UINT64 Lsn;\r | |
341 | UDF_LOGICAL_VOLUME_DESCRIPTOR *LogicalVolDesc;\r | |
baaa3cee | 342 | UDF_DESCRIPTOR_TAG *DescriptorTag;\r |
99c9b949 | 343 | \r |
baaa3cee | 344 | LogicalVolDesc = &Volume->LogicalVolDesc;\r |
99c9b949 PA |
345 | Lsn = GetLongAdLsn (Volume, &LogicalVolDesc->LogicalVolumeContentsUse);\r |
346 | \r | |
347 | //\r | |
baaa3cee PA |
348 | // As per UDF 2.60 specification:\r |
349 | //\r | |
350 | // There shall be exactly one File Set Descriptor recorded per Logical\r | |
351 | // Volume.\r | |
352 | //\r | |
353 | // Read disk block\r | |
99c9b949 PA |
354 | //\r |
355 | Status = DiskIo->ReadDisk (\r | |
356 | DiskIo,\r | |
357 | BlockIo->Media->MediaId,\r | |
358 | MultU64x32 (Lsn, LogicalVolDesc->LogicalBlockSize),\r | |
baaa3cee PA |
359 | sizeof (Volume->FileSetDesc),\r |
360 | &Volume->FileSetDesc\r | |
99c9b949 PA |
361 | );\r |
362 | if (EFI_ERROR (Status)) {\r | |
363 | return Status;\r | |
364 | }\r | |
365 | \r | |
baaa3cee PA |
366 | DescriptorTag = &Volume->FileSetDesc.DescriptorTag;\r |
367 | \r | |
99c9b949 | 368 | //\r |
baaa3cee | 369 | // Check if read block is a File Set Descriptor\r |
99c9b949 | 370 | //\r |
baaa3cee | 371 | if (DescriptorTag->TagIdentifier != UdfFileSetDescriptor) {\r |
99c9b949 PA |
372 | return EFI_VOLUME_CORRUPTED;\r |
373 | }\r | |
374 | \r | |
375 | return EFI_SUCCESS;\r | |
376 | }\r | |
377 | \r | |
077f8c43 HW |
378 | /**\r |
379 | Read Volume and File Structure on an UDF file system.\r | |
380 | \r | |
381 | @param[in] BlockIo BlockIo interface.\r | |
382 | @param[in] DiskIo DiskIo interface.\r | |
383 | @param[out] Volume Volume information pointer.\r | |
384 | \r | |
385 | @retval EFI_SUCCESS Volume and File Structure were read.\r | |
386 | @retval other Volume and File Structure were not read.\r | |
387 | \r | |
388 | **/\r | |
99c9b949 PA |
389 | EFI_STATUS\r |
390 | ReadVolumeFileStructure (\r | |
391 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
392 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
393 | OUT UDF_VOLUME_INFO *Volume\r | |
394 | )\r | |
395 | {\r | |
396 | EFI_STATUS Status;\r | |
397 | UDF_ANCHOR_VOLUME_DESCRIPTOR_POINTER AnchorPoint;\r | |
baaa3cee | 398 | UDF_EXTENT_AD *ExtentAd;\r |
99c9b949 PA |
399 | \r |
400 | //\r | |
baaa3cee | 401 | // Find Anchor Volume Descriptor Pointer\r |
99c9b949 PA |
402 | //\r |
403 | Status = FindAnchorVolumeDescriptorPointer (\r | |
404 | BlockIo,\r | |
405 | DiskIo,\r | |
406 | &AnchorPoint\r | |
407 | );\r | |
408 | if (EFI_ERROR (Status)) {\r | |
409 | return Status;\r | |
410 | }\r | |
411 | \r | |
412 | //\r | |
baaa3cee PA |
413 | // Save Main VDS start block number\r |
414 | //\r | |
415 | ExtentAd = &AnchorPoint.MainVolumeDescriptorSequenceExtent;\r | |
416 | \r | |
417 | Volume->MainVdsStartLocation = (UINT64)ExtentAd->ExtentLocation;\r | |
418 | \r | |
419 | //\r | |
420 | // Start Main Volume Descriptor Sequence.\r | |
99c9b949 PA |
421 | //\r |
422 | Status = StartMainVolumeDescriptorSequence (\r | |
423 | BlockIo,\r | |
424 | DiskIo,\r | |
425 | &AnchorPoint,\r | |
426 | Volume\r | |
427 | );\r | |
428 | if (EFI_ERROR (Status)) {\r | |
429 | return Status;\r | |
430 | }\r | |
431 | \r | |
432 | return Status;\r | |
433 | }\r | |
434 | \r | |
077f8c43 HW |
435 | /**\r |
436 | Calculate length of a given File Identifier Descriptor.\r | |
437 | \r | |
438 | @param[in] FileIdentifierDesc File Identifier Descriptor pointer.\r | |
439 | \r | |
440 | @return The length of a given File Identifier Descriptor.\r | |
441 | \r | |
442 | **/\r | |
99c9b949 PA |
443 | UINT64\r |
444 | GetFidDescriptorLength (\r | |
445 | IN UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc\r | |
446 | )\r | |
447 | {\r | |
448 | return (UINT64)(\r | |
449 | (INTN)((OFFSET_OF (UDF_FILE_IDENTIFIER_DESCRIPTOR, Data[0]) + 3 +\r | |
450 | FileIdentifierDesc->LengthOfFileIdentifier +\r | |
451 | FileIdentifierDesc->LengthOfImplementationUse) >> 2) << 2\r | |
452 | );\r | |
453 | }\r | |
454 | \r | |
077f8c43 HW |
455 | /**\r |
456 | Duplicate a given File Identifier Descriptor.\r | |
457 | \r | |
458 | @param[in] FileIdentifierDesc File Identifier Descriptor pointer.\r | |
459 | @param[out] NewFileIdentifierDesc The duplicated File Identifier Descriptor.\r | |
460 | \r | |
461 | **/\r | |
99c9b949 PA |
462 | VOID\r |
463 | DuplicateFid (\r | |
464 | IN UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc,\r | |
465 | OUT UDF_FILE_IDENTIFIER_DESCRIPTOR **NewFileIdentifierDesc\r | |
466 | )\r | |
467 | {\r | |
468 | *NewFileIdentifierDesc =\r | |
469 | (UDF_FILE_IDENTIFIER_DESCRIPTOR *)AllocateCopyPool (\r | |
0b4c8f00 | 470 | (UINTN) GetFidDescriptorLength (FileIdentifierDesc), FileIdentifierDesc);\r |
3fa40d58 HW |
471 | \r |
472 | ASSERT (*NewFileIdentifierDesc != NULL);\r | |
99c9b949 PA |
473 | }\r |
474 | \r | |
077f8c43 HW |
475 | /**\r |
476 | Duplicate either a given File Entry or a given Extended File Entry.\r | |
477 | \r | |
478 | @param[in] BlockIo BlockIo interface.\r | |
479 | @param[in] Volume Volume information pointer.\r | |
480 | @param[in] FileEntry (Extended) File Entry pointer.\r | |
481 | @param[out] NewFileEntry The duplicated (Extended) File Entry.\r | |
482 | \r | |
483 | **/\r | |
99c9b949 PA |
484 | VOID\r |
485 | DuplicateFe (\r | |
486 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
487 | IN UDF_VOLUME_INFO *Volume,\r | |
488 | IN VOID *FileEntry,\r | |
489 | OUT VOID **NewFileEntry\r | |
490 | )\r | |
491 | {\r | |
492 | *NewFileEntry = AllocateCopyPool (Volume->FileEntrySize, FileEntry);\r | |
3fa40d58 HW |
493 | \r |
494 | ASSERT (*NewFileEntry != NULL);\r | |
99c9b949 PA |
495 | }\r |
496 | \r | |
077f8c43 HW |
497 | /**\r |
498 | Get raw data + length of a given File Entry or Extended File Entry.\r | |
499 | \r | |
500 | The file's recorded data can contain either real file content (inline) or\r | |
501 | a sequence of extents (or Allocation Descriptors) which tells where file's\r | |
502 | content is stored in.\r | |
503 | \r | |
504 | NOTE: The FE/EFE can be thought it was an inode.\r | |
505 | \r | |
506 | @param[in] FileEntryData (Extended) File Entry pointer.\r | |
507 | @param[out] Data Buffer contains the raw data of a given\r | |
508 | (Extended) File Entry.\r | |
509 | @param[out] Length Length of the data in Buffer.\r | |
510 | \r | |
511 | **/\r | |
99c9b949 PA |
512 | VOID\r |
513 | GetFileEntryData (\r | |
514 | IN VOID *FileEntryData,\r | |
515 | OUT VOID **Data,\r | |
516 | OUT UINT64 *Length\r | |
517 | )\r | |
518 | {\r | |
baaa3cee | 519 | UDF_DESCRIPTOR_TAG *DescriptorTag;\r |
99c9b949 PA |
520 | UDF_EXTENDED_FILE_ENTRY *ExtendedFileEntry;\r |
521 | UDF_FILE_ENTRY *FileEntry;\r | |
522 | \r | |
baaa3cee PA |
523 | DescriptorTag = FileEntryData;\r |
524 | \r | |
525 | if (DescriptorTag->TagIdentifier == UdfExtendedFileEntry) {\r | |
99c9b949 PA |
526 | ExtendedFileEntry = (UDF_EXTENDED_FILE_ENTRY *)FileEntryData;\r |
527 | \r | |
528 | *Length = ExtendedFileEntry->InformationLength;\r | |
529 | *Data = (VOID *)((UINT8 *)ExtendedFileEntry->Data +\r | |
530 | ExtendedFileEntry->LengthOfExtendedAttributes);\r | |
baaa3cee | 531 | } else if (DescriptorTag->TagIdentifier == UdfFileEntry) {\r |
99c9b949 PA |
532 | FileEntry = (UDF_FILE_ENTRY *)FileEntryData;\r |
533 | \r | |
534 | *Length = FileEntry->InformationLength;\r | |
535 | *Data = (VOID *)((UINT8 *)FileEntry->Data +\r | |
536 | FileEntry->LengthOfExtendedAttributes);\r | |
537 | }\r | |
538 | }\r | |
539 | \r | |
077f8c43 HW |
540 | /**\r |
541 | Get Allocation Descriptors' data information from a given FE/EFE.\r | |
542 | \r | |
543 | @param[in] FileEntryData (Extended) File Entry pointer.\r | |
544 | @param[out] AdsData Buffer contains the Allocation Descriptors'\r | |
545 | data from a given FE/EFE.\r | |
546 | @param[out] Length Length of the data in AdsData.\r | |
547 | \r | |
548 | **/\r | |
99c9b949 PA |
549 | VOID\r |
550 | GetAdsInformation (\r | |
551 | IN VOID *FileEntryData,\r | |
552 | OUT VOID **AdsData,\r | |
553 | OUT UINT64 *Length\r | |
554 | )\r | |
555 | {\r | |
baaa3cee | 556 | UDF_DESCRIPTOR_TAG *DescriptorTag;\r |
99c9b949 PA |
557 | UDF_EXTENDED_FILE_ENTRY *ExtendedFileEntry;\r |
558 | UDF_FILE_ENTRY *FileEntry;\r | |
559 | \r | |
baaa3cee PA |
560 | DescriptorTag = FileEntryData;\r |
561 | \r | |
562 | if (DescriptorTag->TagIdentifier == UdfExtendedFileEntry) {\r | |
99c9b949 PA |
563 | ExtendedFileEntry = (UDF_EXTENDED_FILE_ENTRY *)FileEntryData;\r |
564 | \r | |
565 | *Length = ExtendedFileEntry->LengthOfAllocationDescriptors;\r | |
566 | *AdsData = (VOID *)((UINT8 *)ExtendedFileEntry->Data +\r | |
567 | ExtendedFileEntry->LengthOfExtendedAttributes);\r | |
baaa3cee | 568 | } else if (DescriptorTag->TagIdentifier == UdfFileEntry) {\r |
99c9b949 PA |
569 | FileEntry = (UDF_FILE_ENTRY *)FileEntryData;\r |
570 | \r | |
571 | *Length = FileEntry->LengthOfAllocationDescriptors;\r | |
572 | *AdsData = (VOID *)((UINT8 *)FileEntry->Data +\r | |
573 | FileEntry->LengthOfExtendedAttributes);\r | |
574 | }\r | |
575 | }\r | |
576 | \r | |
077f8c43 HW |
577 | /**\r |
578 | Read next Long Allocation Descriptor from a given file's data.\r | |
579 | \r | |
580 | @param[in] Data File's data pointer.\r | |
581 | @param[in,out] Offset Starting offset of the File's data to read.\r | |
582 | @param[in] Length Length of the data to read.\r | |
583 | @param[out] FoundLongAd Long Allocation Descriptor pointer.\r | |
584 | \r | |
585 | @retval EFI_SUCCESS A Long Allocation Descriptor was found.\r | |
586 | @retval EFI_DEVICE_ERROR No more Long Allocation Descriptors.\r | |
587 | \r | |
588 | **/\r | |
99c9b949 PA |
589 | EFI_STATUS\r |
590 | GetLongAdFromAds (\r | |
591 | IN VOID *Data,\r | |
592 | IN OUT UINT64 *Offset,\r | |
593 | IN UINT64 Length,\r | |
594 | OUT UDF_LONG_ALLOCATION_DESCRIPTOR **FoundLongAd\r | |
595 | )\r | |
596 | {\r | |
597 | UDF_LONG_ALLOCATION_DESCRIPTOR *LongAd;\r | |
598 | UDF_EXTENT_FLAGS ExtentFlags;\r | |
599 | \r | |
600 | for (;;) {\r | |
601 | if (*Offset >= Length) {\r | |
602 | //\r | |
603 | // No more Long Allocation Descriptors.\r | |
604 | //\r | |
605 | return EFI_DEVICE_ERROR;\r | |
606 | }\r | |
607 | \r | |
608 | LongAd =\r | |
609 | (UDF_LONG_ALLOCATION_DESCRIPTOR *)((UINT8 *)Data + *Offset);\r | |
610 | \r | |
611 | //\r | |
612 | // If it's either an indirect AD (Extended Alllocation Descriptor) or an\r | |
613 | // allocated AD, then return it.\r | |
614 | //\r | |
880ec683 HW |
615 | ExtentFlags = GET_EXTENT_FLAGS (LongAdsSequence, LongAd);\r |
616 | if (ExtentFlags == ExtentIsNextExtent ||\r | |
617 | ExtentFlags == ExtentRecordedAndAllocated) {\r | |
99c9b949 PA |
618 | break;\r |
619 | }\r | |
620 | \r | |
621 | //\r | |
622 | // This AD is either not recorded but allocated, or not recorded and not\r | |
623 | // allocated. Skip it.\r | |
624 | //\r | |
880ec683 | 625 | *Offset += AD_LENGTH (LongAdsSequence);\r |
99c9b949 PA |
626 | }\r |
627 | \r | |
628 | *FoundLongAd = LongAd;\r | |
629 | \r | |
630 | return EFI_SUCCESS;\r | |
631 | }\r | |
632 | \r | |
077f8c43 HW |
633 | /**\r |
634 | Read next Short Allocation Descriptor from a given file's data.\r | |
635 | \r | |
636 | @param[in] Data File's data pointer.\r | |
637 | @param[in,out] Offset Starting offset of the File's data to read.\r | |
638 | @param[in] Length Length of the data to read.\r | |
639 | @param[out] FoundShortAd Short Allocation Descriptor pointer.\r | |
640 | \r | |
641 | @retval EFI_SUCCESS A Short Allocation Descriptor was found.\r | |
642 | @retval EFI_DEVICE_ERROR No more Short Allocation Descriptors.\r | |
643 | \r | |
644 | **/\r | |
99c9b949 PA |
645 | EFI_STATUS\r |
646 | GetShortAdFromAds (\r | |
647 | IN VOID *Data,\r | |
648 | IN OUT UINT64 *Offset,\r | |
649 | IN UINT64 Length,\r | |
650 | OUT UDF_SHORT_ALLOCATION_DESCRIPTOR **FoundShortAd\r | |
651 | )\r | |
652 | {\r | |
653 | UDF_SHORT_ALLOCATION_DESCRIPTOR *ShortAd;\r | |
654 | UDF_EXTENT_FLAGS ExtentFlags;\r | |
655 | \r | |
656 | for (;;) {\r | |
657 | if (*Offset >= Length) {\r | |
658 | //\r | |
659 | // No more Short Allocation Descriptors.\r | |
660 | //\r | |
661 | return EFI_DEVICE_ERROR;\r | |
662 | }\r | |
663 | \r | |
664 | ShortAd =\r | |
665 | (UDF_SHORT_ALLOCATION_DESCRIPTOR *)((UINT8 *)Data + *Offset);\r | |
666 | \r | |
667 | //\r | |
668 | // If it's either an indirect AD (Extended Alllocation Descriptor) or an\r | |
669 | // allocated AD, then return it.\r | |
670 | //\r | |
880ec683 HW |
671 | ExtentFlags = GET_EXTENT_FLAGS (ShortAdsSequence, ShortAd);\r |
672 | if (ExtentFlags == ExtentIsNextExtent ||\r | |
673 | ExtentFlags == ExtentRecordedAndAllocated) {\r | |
99c9b949 PA |
674 | break;\r |
675 | }\r | |
676 | \r | |
677 | //\r | |
678 | // This AD is either not recorded but allocated, or not recorded and not\r | |
679 | // allocated. Skip it.\r | |
680 | //\r | |
880ec683 | 681 | *Offset += AD_LENGTH (ShortAdsSequence);\r |
99c9b949 PA |
682 | }\r |
683 | \r | |
684 | *FoundShortAd = ShortAd;\r | |
685 | \r | |
686 | return EFI_SUCCESS;\r | |
687 | }\r | |
688 | \r | |
077f8c43 HW |
689 | /**\r |
690 | Get either a Short Allocation Descriptor or a Long Allocation Descriptor from\r | |
691 | file's data.\r | |
692 | \r | |
693 | @param[in] RecordingFlags Flag to indicate the type of descriptor.\r | |
694 | @param[in] Data File's data pointer.\r | |
695 | @param[in,out] Offset Starting offset of the File's data to read.\r | |
696 | @param[in] Length Length of the data to read.\r | |
697 | @param[out] FoundAd Allocation Descriptor pointer.\r | |
698 | \r | |
699 | @retval EFI_SUCCESS A Short Allocation Descriptor was found.\r | |
700 | @retval EFI_DEVICE_ERROR No more Allocation Descriptors.\r | |
701 | Invalid type of descriptor was given.\r | |
702 | \r | |
703 | **/\r | |
99c9b949 PA |
704 | EFI_STATUS\r |
705 | GetAllocationDescriptor (\r | |
706 | IN UDF_FE_RECORDING_FLAGS RecordingFlags,\r | |
707 | IN VOID *Data,\r | |
708 | IN OUT UINT64 *Offset,\r | |
709 | IN UINT64 Length,\r | |
710 | OUT VOID **FoundAd\r | |
711 | )\r | |
712 | {\r | |
880ec683 | 713 | if (RecordingFlags == LongAdsSequence) {\r |
99c9b949 PA |
714 | return GetLongAdFromAds (\r |
715 | Data,\r | |
716 | Offset,\r | |
717 | Length,\r | |
718 | (UDF_LONG_ALLOCATION_DESCRIPTOR **)FoundAd\r | |
719 | );\r | |
880ec683 | 720 | } else if (RecordingFlags == ShortAdsSequence) {\r |
99c9b949 PA |
721 | return GetShortAdFromAds (\r |
722 | Data,\r | |
723 | Offset,\r | |
724 | Length,\r | |
725 | (UDF_SHORT_ALLOCATION_DESCRIPTOR **)FoundAd\r | |
726 | );\r | |
727 | }\r | |
728 | \r | |
729 | return EFI_DEVICE_ERROR;\r | |
730 | }\r | |
731 | \r | |
077f8c43 HW |
732 | /**\r |
733 | Return logical sector number of either Short or Long Allocation Descriptor.\r | |
734 | \r | |
735 | @param[in] RecordingFlags Flag to indicate the type of descriptor.\r | |
736 | @param[in] Volume Volume information pointer.\r | |
737 | @param[in] ParentIcb Long Allocation Descriptor pointer.\r | |
738 | @param[in] Ad Allocation Descriptor pointer.\r | |
739 | \r | |
740 | @return The logical sector number of the given Allocation Descriptor.\r | |
741 | \r | |
742 | **/\r | |
99c9b949 PA |
743 | UINT64\r |
744 | GetAllocationDescriptorLsn (\r | |
745 | IN UDF_FE_RECORDING_FLAGS RecordingFlags,\r | |
746 | IN UDF_VOLUME_INFO *Volume,\r | |
747 | IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,\r | |
748 | IN VOID *Ad\r | |
749 | )\r | |
750 | {\r | |
880ec683 | 751 | if (RecordingFlags == LongAdsSequence) {\r |
99c9b949 | 752 | return GetLongAdLsn (Volume, (UDF_LONG_ALLOCATION_DESCRIPTOR *)Ad);\r |
880ec683 | 753 | } else if (RecordingFlags == ShortAdsSequence) {\r |
99c9b949 | 754 | return GetShortAdLsn (\r |
baaa3cee | 755 | Volume,\r |
99c9b949 PA |
756 | GetPdFromLongAd (Volume, ParentIcb),\r |
757 | (UDF_SHORT_ALLOCATION_DESCRIPTOR *)Ad\r | |
758 | );\r | |
759 | }\r | |
760 | \r | |
761 | return 0;\r | |
762 | }\r | |
763 | \r | |
077f8c43 HW |
764 | /**\r |
765 | Return offset + length of a given indirect Allocation Descriptor (AED).\r | |
766 | \r | |
767 | @param[in] BlockIo BlockIo interface.\r | |
768 | @param[in] DiskIo DiskIo interface.\r | |
769 | @param[in] Volume Volume information pointer.\r | |
770 | @param[in] ParentIcb Long Allocation Descriptor pointer.\r | |
771 | @param[in] RecordingFlags Flag to indicate the type of descriptor.\r | |
772 | @param[in] Ad Allocation Descriptor pointer.\r | |
773 | @param[out] Offset Offset of a given indirect Allocation\r | |
774 | Descriptor.\r | |
775 | @param[out] Length Length of a given indirect Allocation\r | |
776 | Descriptor.\r | |
777 | \r | |
778 | @retval EFI_SUCCESS The offset and length were returned.\r | |
779 | @retval EFI_OUT_OF_RESOURCES The offset and length were not returned due\r | |
780 | to lack of resources.\r | |
781 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
782 | @retval other The offset and length were not returned.\r | |
783 | \r | |
784 | **/\r | |
99c9b949 PA |
785 | EFI_STATUS\r |
786 | GetAedAdsOffset (\r | |
787 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
788 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
789 | IN UDF_VOLUME_INFO *Volume,\r | |
790 | IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,\r | |
791 | IN UDF_FE_RECORDING_FLAGS RecordingFlags,\r | |
792 | IN VOID *Ad,\r | |
793 | OUT UINT64 *Offset,\r | |
794 | OUT UINT64 *Length\r | |
795 | )\r | |
796 | {\r | |
797 | EFI_STATUS Status;\r | |
798 | UINT32 ExtentLength;\r | |
799 | UINT64 Lsn;\r | |
800 | VOID *Data;\r | |
801 | UINT32 LogicalBlockSize;\r | |
802 | UDF_ALLOCATION_EXTENT_DESCRIPTOR *AllocExtDesc;\r | |
baaa3cee | 803 | UDF_DESCRIPTOR_TAG *DescriptorTag;\r |
99c9b949 PA |
804 | \r |
805 | ExtentLength = GET_EXTENT_LENGTH (RecordingFlags, Ad);\r | |
806 | Lsn = GetAllocationDescriptorLsn (RecordingFlags,\r | |
807 | Volume,\r | |
808 | ParentIcb,\r | |
809 | Ad);\r | |
810 | \r | |
811 | Data = AllocatePool (ExtentLength);\r | |
812 | if (Data == NULL) {\r | |
813 | return EFI_OUT_OF_RESOURCES;\r | |
814 | }\r | |
815 | \r | |
baaa3cee | 816 | LogicalBlockSize = Volume->LogicalVolDesc.LogicalBlockSize;\r |
99c9b949 PA |
817 | \r |
818 | //\r | |
819 | // Read extent.\r | |
820 | //\r | |
821 | Status = DiskIo->ReadDisk (\r | |
822 | DiskIo,\r | |
823 | BlockIo->Media->MediaId,\r | |
824 | MultU64x32 (Lsn, LogicalBlockSize),\r | |
825 | ExtentLength,\r | |
826 | Data\r | |
827 | );\r | |
828 | if (EFI_ERROR (Status)) {\r | |
829 | goto Exit;\r | |
830 | }\r | |
831 | \r | |
baaa3cee PA |
832 | AllocExtDesc = (UDF_ALLOCATION_EXTENT_DESCRIPTOR *)Data;\r |
833 | \r | |
834 | DescriptorTag = &AllocExtDesc->DescriptorTag;\r | |
835 | \r | |
99c9b949 PA |
836 | //\r |
837 | // Check if read extent contains a valid tag identifier for AED.\r | |
838 | //\r | |
baaa3cee | 839 | if (DescriptorTag->TagIdentifier != UdfAllocationExtentDescriptor) {\r |
99c9b949 PA |
840 | Status = EFI_VOLUME_CORRUPTED;\r |
841 | goto Exit;\r | |
842 | }\r | |
843 | \r | |
844 | //\r | |
845 | // Get AED's block offset and its length.\r | |
846 | //\r | |
847 | *Offset = MultU64x32 (Lsn, LogicalBlockSize) +\r | |
848 | sizeof (UDF_ALLOCATION_EXTENT_DESCRIPTOR);\r | |
849 | *Length = AllocExtDesc->LengthOfAllocationDescriptors;\r | |
850 | \r | |
851 | Exit:\r | |
852 | FreePool (Data);\r | |
853 | \r | |
854 | return Status;\r | |
855 | }\r | |
856 | \r | |
077f8c43 HW |
857 | /**\r |
858 | Read Allocation Extent Descriptor into memory.\r | |
859 | \r | |
860 | @param[in] BlockIo BlockIo interface.\r | |
861 | @param[in] DiskIo DiskIo interface.\r | |
862 | @param[in] Volume Volume information pointer.\r | |
863 | @param[in] ParentIcb Long Allocation Descriptor pointer.\r | |
864 | @param[in] RecordingFlags Flag to indicate the type of descriptor.\r | |
865 | @param[in] Ad Allocation Descriptor pointer.\r | |
866 | @param[out] Data Buffer that contains the Allocation Extent\r | |
867 | Descriptor.\r | |
868 | @param[out] Length Length of Data.\r | |
869 | \r | |
870 | @retval EFI_SUCCESS The Allocation Extent Descriptor was read.\r | |
871 | @retval EFI_OUT_OF_RESOURCES The Allocation Extent Descriptor was not read\r | |
872 | due to lack of resources.\r | |
873 | @retval other Fail to read the disk.\r | |
874 | \r | |
875 | **/\r | |
99c9b949 PA |
876 | EFI_STATUS\r |
877 | GetAedAdsData (\r | |
878 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
879 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
880 | IN UDF_VOLUME_INFO *Volume,\r | |
881 | IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,\r | |
882 | IN UDF_FE_RECORDING_FLAGS RecordingFlags,\r | |
883 | IN VOID *Ad,\r | |
884 | OUT VOID **Data,\r | |
885 | OUT UINT64 *Length\r | |
886 | )\r | |
887 | {\r | |
888 | EFI_STATUS Status;\r | |
889 | UINT64 Offset;\r | |
890 | \r | |
891 | //\r | |
892 | // Get AED's offset + length.\r | |
893 | //\r | |
894 | Status = GetAedAdsOffset (\r | |
895 | BlockIo,\r | |
896 | DiskIo,\r | |
897 | Volume,\r | |
898 | ParentIcb,\r | |
899 | RecordingFlags,\r | |
900 | Ad,\r | |
901 | &Offset,\r | |
902 | Length\r | |
903 | );\r | |
904 | if (EFI_ERROR (Status)) {\r | |
905 | return Status;\r | |
906 | }\r | |
907 | \r | |
908 | //\r | |
909 | // Allocate buffer to read in AED's data.\r | |
910 | //\r | |
0b4c8f00 | 911 | *Data = AllocatePool ((UINTN) (*Length));\r |
99c9b949 PA |
912 | if (*Data == NULL) {\r |
913 | return EFI_OUT_OF_RESOURCES;\r | |
914 | }\r | |
915 | \r | |
916 | return DiskIo->ReadDisk (\r | |
917 | DiskIo,\r | |
918 | BlockIo->Media->MediaId,\r | |
919 | Offset,\r | |
0b4c8f00 | 920 | (UINTN) (*Length),\r |
99c9b949 PA |
921 | *Data\r |
922 | );\r | |
923 | }\r | |
924 | \r | |
077f8c43 HW |
925 | /**\r |
926 | Function used to serialise reads of Allocation Descriptors.\r | |
927 | \r | |
928 | @param[in] RecordingFlags Flag to indicate the type of descriptor.\r | |
929 | @param[in] Ad Allocation Descriptor pointer.\r | |
930 | @param[in, out] Buffer Buffer to hold the next Allocation Descriptor.\r | |
931 | @param[in] Length Length of Buffer.\r | |
932 | \r | |
933 | @retval EFI_SUCCESS Buffer was grown to hold the next Allocation\r | |
934 | Descriptor.\r | |
935 | @retval EFI_OUT_OF_RESOURCES Buffer was not grown due to lack of resources.\r | |
936 | \r | |
937 | **/\r | |
99c9b949 PA |
938 | EFI_STATUS\r |
939 | GrowUpBufferToNextAd (\r | |
940 | IN UDF_FE_RECORDING_FLAGS RecordingFlags,\r | |
941 | IN VOID *Ad,\r | |
942 | IN OUT VOID **Buffer,\r | |
943 | IN UINT64 Length\r | |
944 | )\r | |
945 | {\r | |
946 | UINT32 ExtentLength;\r | |
947 | \r | |
948 | ExtentLength = GET_EXTENT_LENGTH (RecordingFlags, Ad);\r | |
949 | \r | |
950 | if (*Buffer == NULL) {\r | |
951 | *Buffer = AllocatePool (ExtentLength);\r | |
952 | if (*Buffer == NULL) {\r | |
953 | return EFI_OUT_OF_RESOURCES;\r | |
954 | }\r | |
955 | } else {\r | |
0b4c8f00 | 956 | *Buffer = ReallocatePool ((UINTN) Length, (UINTN) (Length + ExtentLength), *Buffer);\r |
99c9b949 PA |
957 | if (*Buffer == NULL) {\r |
958 | return EFI_OUT_OF_RESOURCES;\r | |
959 | }\r | |
960 | }\r | |
961 | \r | |
962 | return EFI_SUCCESS;\r | |
963 | }\r | |
964 | \r | |
077f8c43 HW |
965 | /**\r |
966 | Read data or size of either a File Entry or an Extended File Entry.\r | |
967 | \r | |
968 | @param[in] BlockIo BlockIo interface.\r | |
969 | @param[in] DiskIo DiskIo interface.\r | |
970 | @param[in] Volume Volume information pointer.\r | |
971 | @param[in] ParentIcb Long Allocation Descriptor pointer.\r | |
972 | @param[in] FileEntryData FE/EFE structure pointer.\r | |
973 | @param[in, out] ReadFileInfo Read file information pointer.\r | |
974 | \r | |
975 | @retval EFI_SUCCESS Data or size of a FE/EFE was read.\r | |
976 | @retval EFI_OUT_OF_RESOURCES Data or size of a FE/EFE was not read due to\r | |
977 | lack of resources.\r | |
978 | @retval EFI_INVALID_PARAMETER The read file flag given in ReadFileInfo is\r | |
979 | invalid.\r | |
980 | @retval EFI_UNSUPPORTED The FE recording flag given in FileEntryData\r | |
981 | is not supported.\r | |
982 | @retval other Data or size of a FE/EFE was not read.\r | |
983 | \r | |
984 | **/\r | |
99c9b949 PA |
985 | EFI_STATUS\r |
986 | ReadFile (\r | |
987 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
988 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
989 | IN UDF_VOLUME_INFO *Volume,\r | |
990 | IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,\r | |
991 | IN VOID *FileEntryData,\r | |
992 | IN OUT UDF_READ_FILE_INFO *ReadFileInfo\r | |
993 | )\r | |
994 | {\r | |
995 | EFI_STATUS Status;\r | |
996 | UINT32 LogicalBlockSize;\r | |
997 | VOID *Data;\r | |
998 | UINT64 Length;\r | |
999 | VOID *Ad;\r | |
1000 | UINT64 AdOffset;\r | |
1001 | UINT64 Lsn;\r | |
1002 | BOOLEAN DoFreeAed;\r | |
1003 | UINT64 FilePosition;\r | |
1004 | UINT64 Offset;\r | |
1005 | UINT64 DataOffset;\r | |
1006 | UINT64 BytesLeft;\r | |
1007 | UINT64 DataLength;\r | |
1008 | BOOLEAN FinishedSeeking;\r | |
1009 | UINT32 ExtentLength;\r | |
1010 | UDF_FE_RECORDING_FLAGS RecordingFlags;\r | |
1011 | \r | |
baaa3cee | 1012 | LogicalBlockSize = Volume->LogicalVolDesc.LogicalBlockSize;\r |
99c9b949 PA |
1013 | DoFreeAed = FALSE;\r |
1014 | \r | |
5afa5b81 LE |
1015 | //\r |
1016 | // set BytesLeft to suppress incorrect compiler/analyzer warnings\r | |
1017 | //\r | |
1018 | BytesLeft = 0;\r | |
54537008 SZ |
1019 | DataOffset = 0;\r |
1020 | FilePosition = 0;\r | |
1021 | FinishedSeeking = FALSE;\r | |
1022 | Data = NULL;\r | |
5afa5b81 | 1023 | \r |
99c9b949 | 1024 | switch (ReadFileInfo->Flags) {\r |
880ec683 HW |
1025 | case ReadFileGetFileSize:\r |
1026 | case ReadFileAllocateAndRead:\r | |
99c9b949 PA |
1027 | //\r |
1028 | // Initialise ReadFileInfo structure for either getting file size, or\r | |
1029 | // reading file's recorded data.\r | |
1030 | //\r | |
1031 | ReadFileInfo->ReadLength = 0;\r | |
1032 | ReadFileInfo->FileData = NULL;\r | |
1033 | break;\r | |
880ec683 | 1034 | case ReadFileSeekAndRead:\r |
99c9b949 PA |
1035 | //\r |
1036 | // About to seek a file and/or read its data.\r | |
1037 | //\r | |
1038 | Length = ReadFileInfo->FileSize - ReadFileInfo->FilePosition;\r | |
1039 | if (ReadFileInfo->FileDataSize > Length) {\r | |
1040 | //\r | |
1041 | // About to read beyond the EOF -- truncate it.\r | |
1042 | //\r | |
1043 | ReadFileInfo->FileDataSize = Length;\r | |
1044 | }\r | |
1045 | \r | |
1046 | //\r | |
1047 | // Initialise data to start seeking and/or reading a file.\r | |
1048 | //\r | |
1049 | BytesLeft = ReadFileInfo->FileDataSize;\r | |
1050 | DataOffset = 0;\r | |
1051 | FilePosition = 0;\r | |
1052 | FinishedSeeking = FALSE;\r | |
1053 | \r | |
1054 | break;\r | |
1055 | }\r | |
1056 | \r | |
1057 | RecordingFlags = GET_FE_RECORDING_FLAGS (FileEntryData);\r | |
1058 | switch (RecordingFlags) {\r | |
880ec683 | 1059 | case InlineData:\r |
99c9b949 PA |
1060 | //\r |
1061 | // There are no extents for this FE/EFE. All data is inline.\r | |
1062 | //\r | |
1063 | GetFileEntryData (FileEntryData, &Data, &Length);\r | |
1064 | \r | |
880ec683 | 1065 | if (ReadFileInfo->Flags == ReadFileGetFileSize) {\r |
99c9b949 | 1066 | ReadFileInfo->ReadLength = Length;\r |
880ec683 | 1067 | } else if (ReadFileInfo->Flags == ReadFileAllocateAndRead) {\r |
99c9b949 PA |
1068 | //\r |
1069 | // Allocate buffer for starting read data.\r | |
1070 | //\r | |
0b4c8f00 | 1071 | ReadFileInfo->FileData = AllocatePool ((UINTN) Length);\r |
99c9b949 PA |
1072 | if (ReadFileInfo->FileData == NULL) {\r |
1073 | return EFI_OUT_OF_RESOURCES;\r | |
1074 | }\r | |
1075 | \r | |
1076 | //\r | |
1077 | // Read all inline data into ReadFileInfo->FileData\r | |
1078 | //\r | |
0b4c8f00 | 1079 | CopyMem (ReadFileInfo->FileData, Data, (UINTN) Length);\r |
99c9b949 | 1080 | ReadFileInfo->ReadLength = Length;\r |
880ec683 | 1081 | } else if (ReadFileInfo->Flags == ReadFileSeekAndRead) {\r |
99c9b949 PA |
1082 | //\r |
1083 | // If FilePosition is non-zero, seek file to FilePosition, read\r | |
1084 | // FileDataSize bytes and then updates FilePosition.\r | |
1085 | //\r | |
1086 | CopyMem (\r | |
1087 | ReadFileInfo->FileData,\r | |
1088 | (VOID *)((UINT8 *)Data + ReadFileInfo->FilePosition),\r | |
0b4c8f00 | 1089 | (UINTN) ReadFileInfo->FileDataSize\r |
99c9b949 PA |
1090 | );\r |
1091 | \r | |
1092 | ReadFileInfo->FilePosition += ReadFileInfo->FileDataSize;\r | |
a3240c63 LE |
1093 | } else {\r |
1094 | ASSERT (FALSE);\r | |
1095 | return EFI_INVALID_PARAMETER;\r | |
99c9b949 PA |
1096 | }\r |
1097 | \r | |
131fd40f | 1098 | Status = EFI_SUCCESS;\r |
99c9b949 | 1099 | break;\r |
131fd40f | 1100 | \r |
880ec683 HW |
1101 | case LongAdsSequence:\r |
1102 | case ShortAdsSequence:\r | |
99c9b949 PA |
1103 | //\r |
1104 | // This FE/EFE contains a run of Allocation Descriptors. Get data + size\r | |
1105 | // for start reading them out.\r | |
1106 | //\r | |
1107 | GetAdsInformation (FileEntryData, &Data, &Length);\r | |
1108 | AdOffset = 0;\r | |
1109 | \r | |
1110 | for (;;) {\r | |
1111 | //\r | |
1112 | // Read AD.\r | |
1113 | //\r | |
1114 | Status = GetAllocationDescriptor (\r | |
1115 | RecordingFlags,\r | |
1116 | Data,\r | |
1117 | &AdOffset,\r | |
1118 | Length,\r | |
1119 | &Ad\r | |
1120 | );\r | |
1121 | if (Status == EFI_DEVICE_ERROR) {\r | |
1122 | Status = EFI_SUCCESS;\r | |
1123 | goto Done;\r | |
1124 | }\r | |
1125 | \r | |
1126 | //\r | |
1127 | // Check if AD is an indirect AD. If so, read Allocation Extent\r | |
1128 | // Descriptor and its extents (ADs).\r | |
1129 | //\r | |
880ec683 | 1130 | if (GET_EXTENT_FLAGS (RecordingFlags, Ad) == ExtentIsNextExtent) {\r |
99c9b949 PA |
1131 | if (!DoFreeAed) {\r |
1132 | DoFreeAed = TRUE;\r | |
1133 | } else {\r | |
1134 | FreePool (Data);\r | |
1135 | }\r | |
1136 | \r | |
1137 | Status = GetAedAdsData (\r | |
1138 | BlockIo,\r | |
1139 | DiskIo,\r | |
1140 | Volume,\r | |
1141 | ParentIcb,\r | |
1142 | RecordingFlags,\r | |
1143 | Ad,\r | |
1144 | &Data,\r | |
1145 | &Length\r | |
1146 | );\r | |
1147 | if (EFI_ERROR (Status)) {\r | |
1148 | goto Error_Get_Aed;\r | |
1149 | }\r | |
3fa40d58 | 1150 | ASSERT (Data != NULL);\r |
99c9b949 PA |
1151 | \r |
1152 | AdOffset = 0;\r | |
1153 | continue;\r | |
1154 | }\r | |
1155 | \r | |
1156 | ExtentLength = GET_EXTENT_LENGTH (RecordingFlags, Ad);\r | |
1157 | \r | |
1158 | Lsn = GetAllocationDescriptorLsn (RecordingFlags,\r | |
1159 | Volume,\r | |
1160 | ParentIcb,\r | |
1161 | Ad);\r | |
1162 | \r | |
1163 | switch (ReadFileInfo->Flags) {\r | |
880ec683 | 1164 | case ReadFileGetFileSize:\r |
99c9b949 PA |
1165 | ReadFileInfo->ReadLength += ExtentLength;\r |
1166 | break;\r | |
880ec683 | 1167 | case ReadFileAllocateAndRead:\r |
99c9b949 PA |
1168 | //\r |
1169 | // Increase FileData (if necessary) to read next extent.\r | |
1170 | //\r | |
1171 | Status = GrowUpBufferToNextAd (\r | |
1172 | RecordingFlags,\r | |
1173 | Ad,\r | |
1174 | &ReadFileInfo->FileData,\r | |
1175 | ReadFileInfo->ReadLength\r | |
1176 | );\r | |
1177 | if (EFI_ERROR (Status)) {\r | |
1178 | goto Error_Alloc_Buffer_To_Next_Ad;\r | |
1179 | }\r | |
1180 | \r | |
1181 | //\r | |
1182 | // Read extent's data into FileData.\r | |
1183 | //\r | |
1184 | Status = DiskIo->ReadDisk (\r | |
1185 | DiskIo,\r | |
1186 | BlockIo->Media->MediaId,\r | |
1187 | MultU64x32 (Lsn, LogicalBlockSize),\r | |
1188 | ExtentLength,\r | |
1189 | (VOID *)((UINT8 *)ReadFileInfo->FileData +\r | |
1190 | ReadFileInfo->ReadLength)\r | |
1191 | );\r | |
1192 | if (EFI_ERROR (Status)) {\r | |
1193 | goto Error_Read_Disk_Blk;\r | |
1194 | }\r | |
1195 | \r | |
1196 | ReadFileInfo->ReadLength += ExtentLength;\r | |
1197 | break;\r | |
880ec683 | 1198 | case ReadFileSeekAndRead:\r |
99c9b949 PA |
1199 | //\r |
1200 | // Seek file first before reading in its data.\r | |
1201 | //\r | |
1202 | if (FinishedSeeking) {\r | |
1203 | Offset = 0;\r | |
1204 | goto Skip_File_Seek;\r | |
1205 | }\r | |
1206 | \r | |
1207 | if (FilePosition + ExtentLength < ReadFileInfo->FilePosition) {\r | |
1208 | FilePosition += ExtentLength;\r | |
1209 | goto Skip_Ad;\r | |
1210 | }\r | |
1211 | \r | |
1212 | if (FilePosition + ExtentLength > ReadFileInfo->FilePosition) {\r | |
1213 | Offset = ReadFileInfo->FilePosition - FilePosition;\r | |
99c9b949 PA |
1214 | } else {\r |
1215 | Offset = 0;\r | |
1216 | }\r | |
1217 | \r | |
1218 | //\r | |
1219 | // Done with seeking file. Start reading its data.\r | |
1220 | //\r | |
1221 | FinishedSeeking = TRUE;\r | |
1222 | \r | |
1223 | Skip_File_Seek:\r | |
1224 | //\r | |
1225 | // Make sure we don't read more data than really wanted.\r | |
1226 | //\r | |
1227 | if (ExtentLength - Offset > BytesLeft) {\r | |
1228 | DataLength = BytesLeft;\r | |
1229 | } else {\r | |
1230 | DataLength = ExtentLength - Offset;\r | |
1231 | }\r | |
1232 | \r | |
1233 | //\r | |
1234 | // Read extent's data into FileData.\r | |
1235 | //\r | |
1236 | Status = DiskIo->ReadDisk (\r | |
1237 | DiskIo,\r | |
1238 | BlockIo->Media->MediaId,\r | |
1239 | Offset + MultU64x32 (Lsn, LogicalBlockSize),\r | |
0b4c8f00 | 1240 | (UINTN) DataLength,\r |
99c9b949 PA |
1241 | (VOID *)((UINT8 *)ReadFileInfo->FileData +\r |
1242 | DataOffset)\r | |
1243 | );\r | |
1244 | if (EFI_ERROR (Status)) {\r | |
1245 | goto Error_Read_Disk_Blk;\r | |
1246 | }\r | |
1247 | \r | |
1248 | //\r | |
1249 | // Update current file's position.\r | |
1250 | //\r | |
1251 | DataOffset += DataLength;\r | |
1252 | ReadFileInfo->FilePosition += DataLength;\r | |
1253 | \r | |
1254 | BytesLeft -= DataLength;\r | |
1255 | if (BytesLeft == 0) {\r | |
1256 | //\r | |
1257 | // There is no more file data to read.\r | |
1258 | //\r | |
1259 | Status = EFI_SUCCESS;\r | |
1260 | goto Done;\r | |
1261 | }\r | |
1262 | \r | |
1263 | break;\r | |
1264 | }\r | |
1265 | \r | |
1266 | Skip_Ad:\r | |
1267 | //\r | |
1268 | // Point to the next AD (extent).\r | |
1269 | //\r | |
1270 | AdOffset += AD_LENGTH (RecordingFlags);\r | |
1271 | }\r | |
1272 | \r | |
1273 | break;\r | |
880ec683 | 1274 | case ExtendedAdsSequence:\r |
99c9b949 PA |
1275 | // FIXME: Not supported. Got no volume with it, yet.\r |
1276 | ASSERT (FALSE);\r | |
1277 | Status = EFI_UNSUPPORTED;\r | |
1278 | break;\r | |
998aee89 LE |
1279 | \r |
1280 | default:\r | |
1281 | //\r | |
1282 | // A flag value reserved by the ECMA-167 standard (3rd Edition - June\r | |
1283 | // 1997); 14.6 ICB Tag; 14.6.8 Flags (RBP 18); was found.\r | |
1284 | //\r | |
1285 | Status = EFI_UNSUPPORTED;\r | |
1286 | break;\r | |
99c9b949 PA |
1287 | }\r |
1288 | \r | |
1289 | Done:\r | |
1290 | if (DoFreeAed) {\r | |
1291 | FreePool (Data);\r | |
1292 | }\r | |
1293 | \r | |
1294 | return Status;\r | |
1295 | \r | |
1296 | Error_Read_Disk_Blk:\r | |
1297 | Error_Alloc_Buffer_To_Next_Ad:\r | |
880ec683 | 1298 | if (ReadFileInfo->Flags != ReadFileSeekAndRead) {\r |
99c9b949 PA |
1299 | FreePool (ReadFileInfo->FileData);\r |
1300 | }\r | |
1301 | \r | |
1302 | if (DoFreeAed) {\r | |
1303 | FreePool (Data);\r | |
1304 | }\r | |
1305 | \r | |
1306 | Error_Get_Aed:\r | |
1307 | return Status;\r | |
1308 | }\r | |
1309 | \r | |
077f8c43 HW |
1310 | /**\r |
1311 | Find a file by its filename from a given Parent file.\r | |
1312 | \r | |
1313 | @param[in] BlockIo BlockIo interface.\r | |
1314 | @param[in] DiskIo DiskIo interface.\r | |
1315 | @param[in] Volume Volume information pointer.\r | |
1316 | @param[in] FileName File name string.\r | |
1317 | @param[in] Parent Parent directory file.\r | |
1318 | @param[in] Icb Long Allocation Descriptor pointer.\r | |
1319 | @param[out] File Found file.\r | |
1320 | \r | |
1321 | @retval EFI_SUCCESS The file was found.\r | |
1322 | @retval EFI_INVALID_PARAMETER One or more input parameters are invalid.\r | |
1323 | @retval EFI_NOT_FOUND The file was not found.\r | |
1324 | \r | |
1325 | **/\r | |
99c9b949 PA |
1326 | EFI_STATUS\r |
1327 | InternalFindFile (\r | |
1328 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
1329 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
1330 | IN UDF_VOLUME_INFO *Volume,\r | |
1331 | IN CHAR16 *FileName,\r | |
1332 | IN UDF_FILE_INFO *Parent,\r | |
1333 | IN UDF_LONG_ALLOCATION_DESCRIPTOR *Icb,\r | |
1334 | OUT UDF_FILE_INFO *File\r | |
1335 | )\r | |
1336 | {\r | |
1337 | EFI_STATUS Status;\r | |
1338 | UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc;\r | |
1339 | UDF_READ_DIRECTORY_INFO ReadDirInfo;\r | |
1340 | BOOLEAN Found;\r | |
1341 | CHAR16 FoundFileName[UDF_FILENAME_LENGTH];\r | |
1342 | VOID *CompareFileEntry;\r | |
1343 | \r | |
3fa40d58 HW |
1344 | //\r |
1345 | // Check if both Parent->FileIdentifierDesc and Icb are NULL.\r | |
1346 | //\r | |
1347 | if ((Parent->FileIdentifierDesc == NULL) && (Icb == NULL)) {\r | |
1348 | return EFI_INVALID_PARAMETER;\r | |
1349 | }\r | |
1350 | \r | |
99c9b949 PA |
1351 | //\r |
1352 | // Check if parent file is really directory.\r | |
1353 | //\r | |
baaa3cee | 1354 | if (FE_ICB_FILE_TYPE (Parent->FileEntry) != UdfFileEntryDirectory) {\r |
99c9b949 PA |
1355 | return EFI_NOT_FOUND;\r |
1356 | }\r | |
1357 | \r | |
1358 | //\r | |
1359 | // If FileName is current file or working directory, just duplicate Parent's\r | |
1360 | // FE/EFE and FID descriptors.\r | |
1361 | //\r | |
1362 | if (StrCmp (FileName, L".") == 0) {\r | |
3fa40d58 HW |
1363 | if (Parent->FileIdentifierDesc == NULL) {\r |
1364 | return EFI_INVALID_PARAMETER;\r | |
1365 | }\r | |
1366 | \r | |
99c9b949 PA |
1367 | DuplicateFe (BlockIo, Volume, Parent->FileEntry, &File->FileEntry);\r |
1368 | DuplicateFid (Parent->FileIdentifierDesc, &File->FileIdentifierDesc);\r | |
1369 | \r | |
1370 | return EFI_SUCCESS;\r | |
1371 | }\r | |
1372 | \r | |
1373 | //\r | |
1374 | // Start directory listing.\r | |
1375 | //\r | |
1376 | ZeroMem ((VOID *)&ReadDirInfo, sizeof (UDF_READ_DIRECTORY_INFO));\r | |
1377 | Found = FALSE;\r | |
1378 | \r | |
1379 | for (;;) {\r | |
1380 | Status = ReadDirectoryEntry (\r | |
1381 | BlockIo,\r | |
1382 | DiskIo,\r | |
1383 | Volume,\r | |
12b83f56 | 1384 | (Parent->FileIdentifierDesc != NULL) ?\r |
99c9b949 PA |
1385 | &Parent->FileIdentifierDesc->Icb :\r |
1386 | Icb,\r | |
1387 | Parent->FileEntry,\r | |
1388 | &ReadDirInfo,\r | |
1389 | &FileIdentifierDesc\r | |
1390 | );\r | |
1391 | if (EFI_ERROR (Status)) {\r | |
1392 | if (Status == EFI_DEVICE_ERROR) {\r | |
1393 | Status = EFI_NOT_FOUND;\r | |
1394 | }\r | |
1395 | \r | |
1396 | break;\r | |
1397 | }\r | |
1398 | \r | |
baaa3cee | 1399 | if (FileIdentifierDesc->FileCharacteristics & PARENT_FILE) {\r |
99c9b949 PA |
1400 | //\r |
1401 | // This FID contains the location (FE/EFE) of the parent directory of this\r | |
1402 | // directory (Parent), and if FileName is either ".." or "\\", then it's\r | |
1403 | // the expected FID.\r | |
1404 | //\r | |
1405 | if (StrCmp (FileName, L"..") == 0 || StrCmp (FileName, L"\\") == 0) {\r | |
1406 | Found = TRUE;\r | |
1407 | break;\r | |
1408 | }\r | |
1409 | } else {\r | |
1410 | Status = GetFileNameFromFid (FileIdentifierDesc, FoundFileName);\r | |
1411 | if (EFI_ERROR (Status)) {\r | |
1412 | break;\r | |
1413 | }\r | |
1414 | \r | |
1415 | if (StrCmp (FileName, FoundFileName) == 0) {\r | |
1416 | //\r | |
1417 | // FID has been found. Prepare to find its respective FE/EFE.\r | |
1418 | //\r | |
1419 | Found = TRUE;\r | |
1420 | break;\r | |
1421 | }\r | |
1422 | }\r | |
1423 | \r | |
1424 | FreePool ((VOID *)FileIdentifierDesc);\r | |
1425 | }\r | |
1426 | \r | |
1427 | if (ReadDirInfo.DirectoryData != NULL) {\r | |
1428 | //\r | |
1429 | // Free all allocated resources for the directory listing.\r | |
1430 | //\r | |
1431 | FreePool (ReadDirInfo.DirectoryData);\r | |
1432 | }\r | |
1433 | \r | |
1434 | if (Found) {\r | |
1435 | Status = EFI_SUCCESS;\r | |
1436 | \r | |
1437 | File->FileIdentifierDesc = FileIdentifierDesc;\r | |
1438 | \r | |
1439 | //\r | |
1440 | // If the requested file is root directory, then the FE/EFE was already\r | |
1441 | // retrieved in UdfOpenVolume() function, thus no need to find it again.\r | |
1442 | //\r | |
1443 | // Otherwise, find FE/EFE from the respective FID.\r | |
1444 | //\r | |
1445 | if (StrCmp (FileName, L"\\") != 0) {\r | |
1446 | Status = FindFileEntry (\r | |
1447 | BlockIo,\r | |
1448 | DiskIo,\r | |
1449 | Volume,\r | |
1450 | &FileIdentifierDesc->Icb,\r | |
1451 | &CompareFileEntry\r | |
1452 | );\r | |
1453 | if (EFI_ERROR (Status)) {\r | |
1454 | goto Error_Find_Fe;\r | |
1455 | }\r | |
1456 | \r | |
1457 | //\r | |
1458 | // Make sure that both Parent's FE/EFE and found FE/EFE are not equal.\r | |
1459 | //\r | |
1460 | if (CompareMem ((VOID *)Parent->FileEntry, (VOID *)CompareFileEntry,\r | |
1461 | Volume->FileEntrySize) != 0) {\r | |
1462 | File->FileEntry = CompareFileEntry;\r | |
1463 | } else {\r | |
1464 | FreePool ((VOID *)FileIdentifierDesc);\r | |
1465 | FreePool ((VOID *)CompareFileEntry);\r | |
1466 | Status = EFI_NOT_FOUND;\r | |
1467 | }\r | |
1468 | }\r | |
1469 | }\r | |
1470 | \r | |
1471 | return Status;\r | |
1472 | \r | |
1473 | Error_Find_Fe:\r | |
1474 | FreePool ((VOID *)FileIdentifierDesc);\r | |
1475 | \r | |
1476 | return Status;\r | |
1477 | }\r | |
1478 | \r | |
1479 | /**\r | |
1480 | Read volume information on a medium which contains a valid UDF file system.\r | |
1481 | \r | |
1482 | @param[in] BlockIo BlockIo interface.\r | |
1483 | @param[in] DiskIo DiskIo interface.\r | |
1484 | @param[out] Volume UDF volume information structure.\r | |
1485 | \r | |
1486 | @retval EFI_SUCCESS Volume information read.\r | |
1487 | @retval EFI_NO_MEDIA The device has no media.\r | |
1488 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
1489 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
1490 | @retval EFI_OUT_OF_RESOURCES The volume was not read due to lack of resources.\r | |
1491 | \r | |
1492 | **/\r | |
1493 | EFI_STATUS\r | |
1494 | ReadUdfVolumeInformation (\r | |
1495 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
1496 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
1497 | OUT UDF_VOLUME_INFO *Volume\r | |
1498 | )\r | |
1499 | {\r | |
1500 | EFI_STATUS Status;\r | |
1501 | \r | |
baaa3cee PA |
1502 | //\r |
1503 | // Read all necessary UDF volume information and keep it private to the driver\r | |
1504 | //\r | |
99c9b949 PA |
1505 | Status = ReadVolumeFileStructure (\r |
1506 | BlockIo,\r | |
1507 | DiskIo,\r | |
1508 | Volume\r | |
1509 | );\r | |
1510 | if (EFI_ERROR (Status)) {\r | |
1511 | return Status;\r | |
1512 | }\r | |
1513 | \r | |
baaa3cee PA |
1514 | //\r |
1515 | // Find File Set Descriptor\r | |
1516 | //\r | |
1517 | Status = FindFileSetDescriptor (BlockIo, DiskIo, Volume);\r | |
99c9b949 | 1518 | if (EFI_ERROR (Status)) {\r |
baaa3cee | 1519 | return Status;\r |
99c9b949 PA |
1520 | }\r |
1521 | \r | |
1522 | return Status;\r | |
1523 | }\r | |
1524 | \r | |
1525 | /**\r | |
1526 | Find the root directory on an UDF volume.\r | |
1527 | \r | |
1528 | @param[in] BlockIo BlockIo interface.\r | |
1529 | @param[in] DiskIo DiskIo interface.\r | |
1530 | @param[in] Volume UDF volume information structure.\r | |
1531 | @param[out] File Root directory file.\r | |
1532 | \r | |
1533 | @retval EFI_SUCCESS Root directory found.\r | |
1534 | @retval EFI_NO_MEDIA The device has no media.\r | |
1535 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
1536 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
1537 | @retval EFI_OUT_OF_RESOURCES The root directory was not found due to lack of\r | |
1538 | resources.\r | |
1539 | \r | |
1540 | **/\r | |
1541 | EFI_STATUS\r | |
1542 | FindRootDirectory (\r | |
1543 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
1544 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
1545 | IN UDF_VOLUME_INFO *Volume,\r | |
1546 | OUT UDF_FILE_INFO *File\r | |
1547 | )\r | |
1548 | {\r | |
1549 | EFI_STATUS Status;\r | |
1550 | UDF_FILE_INFO Parent;\r | |
1551 | \r | |
1552 | Status = FindFileEntry (\r | |
1553 | BlockIo,\r | |
1554 | DiskIo,\r | |
1555 | Volume,\r | |
baaa3cee | 1556 | &Volume->FileSetDesc.RootDirectoryIcb,\r |
99c9b949 PA |
1557 | &File->FileEntry\r |
1558 | );\r | |
1559 | if (EFI_ERROR (Status)) {\r | |
1560 | return Status;\r | |
1561 | }\r | |
1562 | \r | |
1563 | Parent.FileEntry = File->FileEntry;\r | |
1564 | Parent.FileIdentifierDesc = NULL;\r | |
1565 | \r | |
1566 | Status = FindFile (\r | |
1567 | BlockIo,\r | |
1568 | DiskIo,\r | |
1569 | Volume,\r | |
1570 | L"\\",\r | |
1571 | NULL,\r | |
1572 | &Parent,\r | |
baaa3cee | 1573 | &Volume->FileSetDesc.RootDirectoryIcb,\r |
99c9b949 PA |
1574 | File\r |
1575 | );\r | |
1576 | if (EFI_ERROR (Status)) {\r | |
1577 | FreePool (File->FileEntry);\r | |
1578 | }\r | |
1579 | \r | |
1580 | return Status;\r | |
1581 | }\r | |
1582 | \r | |
1583 | /**\r | |
1584 | Find either a File Entry or a Extended File Entry from a given ICB.\r | |
1585 | \r | |
1586 | @param[in] BlockIo BlockIo interface.\r | |
1587 | @param[in] DiskIo DiskIo interface.\r | |
1588 | @param[in] Volume UDF volume information structure.\r | |
1589 | @param[in] Icb ICB of the FID.\r | |
1590 | @param[out] FileEntry File Entry or Extended File Entry.\r | |
1591 | \r | |
1592 | @retval EFI_SUCCESS File Entry or Extended File Entry found.\r | |
1593 | @retval EFI_NO_MEDIA The device has no media.\r | |
1594 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
1595 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
1596 | @retval EFI_OUT_OF_RESOURCES The FE/EFE entry was not found due to lack of\r | |
1597 | resources.\r | |
1598 | \r | |
1599 | **/\r | |
1600 | EFI_STATUS\r | |
1601 | FindFileEntry (\r | |
1602 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
1603 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
1604 | IN UDF_VOLUME_INFO *Volume,\r | |
1605 | IN UDF_LONG_ALLOCATION_DESCRIPTOR *Icb,\r | |
1606 | OUT VOID **FileEntry\r | |
1607 | )\r | |
1608 | {\r | |
baaa3cee PA |
1609 | EFI_STATUS Status;\r |
1610 | UINT64 Lsn;\r | |
1611 | UINT32 LogicalBlockSize;\r | |
1612 | UDF_DESCRIPTOR_TAG *DescriptorTag;\r | |
99c9b949 PA |
1613 | \r |
1614 | Lsn = GetLongAdLsn (Volume, Icb);\r | |
baaa3cee | 1615 | LogicalBlockSize = Volume->LogicalVolDesc.LogicalBlockSize;\r |
99c9b949 PA |
1616 | \r |
1617 | *FileEntry = AllocateZeroPool (Volume->FileEntrySize);\r | |
1618 | if (*FileEntry == NULL) {\r | |
1619 | return EFI_OUT_OF_RESOURCES;\r | |
1620 | }\r | |
1621 | \r | |
1622 | //\r | |
1623 | // Read extent.\r | |
1624 | //\r | |
1625 | Status = DiskIo->ReadDisk (\r | |
1626 | DiskIo,\r | |
1627 | BlockIo->Media->MediaId,\r | |
1628 | MultU64x32 (Lsn, LogicalBlockSize),\r | |
1629 | Volume->FileEntrySize,\r | |
1630 | *FileEntry\r | |
1631 | );\r | |
1632 | if (EFI_ERROR (Status)) {\r | |
1633 | goto Error_Read_Disk_Blk;\r | |
1634 | }\r | |
1635 | \r | |
baaa3cee PA |
1636 | DescriptorTag = *FileEntry;\r |
1637 | \r | |
99c9b949 PA |
1638 | //\r |
1639 | // Check if the read extent contains a valid Tag Identifier for the expected\r | |
1640 | // FE/EFE.\r | |
1641 | //\r | |
baaa3cee PA |
1642 | if (DescriptorTag->TagIdentifier != UdfFileEntry &&\r |
1643 | DescriptorTag->TagIdentifier != UdfExtendedFileEntry) {\r | |
99c9b949 PA |
1644 | Status = EFI_VOLUME_CORRUPTED;\r |
1645 | goto Error_Invalid_Fe;\r | |
1646 | }\r | |
1647 | \r | |
1648 | return EFI_SUCCESS;\r | |
1649 | \r | |
1650 | Error_Invalid_Fe:\r | |
1651 | Error_Read_Disk_Blk:\r | |
1652 | FreePool (*FileEntry);\r | |
1653 | \r | |
1654 | return Status;\r | |
1655 | }\r | |
1656 | \r | |
1657 | /**\r | |
1658 | Find a file given its absolute path on an UDF volume.\r | |
1659 | \r | |
1660 | @param[in] BlockIo BlockIo interface.\r | |
1661 | @param[in] DiskIo DiskIo interface.\r | |
1662 | @param[in] Volume UDF volume information structure.\r | |
1663 | @param[in] FilePath File's absolute path.\r | |
1664 | @param[in] Root Root directory file.\r | |
1665 | @param[in] Parent Parent directory file.\r | |
077f8c43 | 1666 | @param[in] Icb ICB of Parent.\r |
99c9b949 PA |
1667 | @param[out] File Found file.\r |
1668 | \r | |
077f8c43 | 1669 | @retval EFI_SUCCESS FilePath was found.\r |
99c9b949 PA |
1670 | @retval EFI_NO_MEDIA The device has no media.\r |
1671 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
1672 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
077f8c43 | 1673 | @retval EFI_OUT_OF_RESOURCES The FilePath file was not found due to lack of\r |
99c9b949 PA |
1674 | resources.\r |
1675 | \r | |
1676 | **/\r | |
1677 | EFI_STATUS\r | |
1678 | FindFile (\r | |
1679 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
1680 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
1681 | IN UDF_VOLUME_INFO *Volume,\r | |
1682 | IN CHAR16 *FilePath,\r | |
1683 | IN UDF_FILE_INFO *Root,\r | |
1684 | IN UDF_FILE_INFO *Parent,\r | |
1685 | IN UDF_LONG_ALLOCATION_DESCRIPTOR *Icb,\r | |
1686 | OUT UDF_FILE_INFO *File\r | |
1687 | )\r | |
1688 | {\r | |
1689 | EFI_STATUS Status;\r | |
1690 | CHAR16 FileName[UDF_FILENAME_LENGTH];\r | |
1691 | CHAR16 *FileNamePointer;\r | |
1692 | UDF_FILE_INFO PreviousFile;\r | |
1693 | VOID *FileEntry;\r | |
1694 | \r | |
1695 | Status = EFI_NOT_FOUND;\r | |
1696 | \r | |
1697 | CopyMem ((VOID *)&PreviousFile, (VOID *)Parent, sizeof (UDF_FILE_INFO));\r | |
1698 | while (*FilePath != L'\0') {\r | |
1699 | FileNamePointer = FileName;\r | |
1700 | while (*FilePath != L'\0' && *FilePath != L'\\') {\r | |
1701 | *FileNamePointer++ = *FilePath++;\r | |
1702 | }\r | |
1703 | \r | |
1704 | *FileNamePointer = L'\0';\r | |
1705 | if (FileName[0] == L'\0') {\r | |
1706 | //\r | |
1707 | // Open root directory.\r | |
1708 | //\r | |
1709 | if (Root == NULL) {\r | |
1710 | //\r | |
1711 | // There is no file found for the root directory yet. So, find only its\r | |
1712 | // FID by now.\r | |
1713 | //\r | |
1714 | // See UdfOpenVolume() function.\r | |
1715 | //\r | |
1716 | Status = InternalFindFile (BlockIo,\r | |
1717 | DiskIo,\r | |
1718 | Volume,\r | |
1719 | L"\\",\r | |
1720 | &PreviousFile,\r | |
1721 | Icb,\r | |
1722 | File);\r | |
1723 | } else {\r | |
1724 | //\r | |
1725 | // We've already a file pointer (Root) for the root directory. Duplicate\r | |
1726 | // its FE/EFE and FID descriptors.\r | |
1727 | //\r | |
1728 | DuplicateFe (BlockIo, Volume, Root->FileEntry, &File->FileEntry);\r | |
1729 | DuplicateFid (Root->FileIdentifierDesc, &File->FileIdentifierDesc);\r | |
1730 | Status = EFI_SUCCESS;\r | |
1731 | }\r | |
1732 | } else {\r | |
1733 | //\r | |
1734 | // No root directory. Find filename from the current directory.\r | |
1735 | //\r | |
1736 | Status = InternalFindFile (BlockIo,\r | |
1737 | DiskIo,\r | |
1738 | Volume,\r | |
1739 | FileName,\r | |
1740 | &PreviousFile,\r | |
1741 | Icb,\r | |
1742 | File);\r | |
1743 | }\r | |
1744 | \r | |
1745 | if (EFI_ERROR (Status)) {\r | |
1746 | return Status;\r | |
1747 | }\r | |
1748 | \r | |
1749 | //\r | |
1750 | // If the found file is a symlink, then find its respective FE/EFE and\r | |
1751 | // FID descriptors.\r | |
1752 | //\r | |
baaa3cee | 1753 | if (FE_ICB_FILE_TYPE (File->FileEntry) == UdfFileEntrySymlink) {\r |
99c9b949 PA |
1754 | FreePool ((VOID *)File->FileIdentifierDesc);\r |
1755 | \r | |
1756 | FileEntry = File->FileEntry;\r | |
1757 | \r | |
1758 | Status = ResolveSymlink (BlockIo,\r | |
1759 | DiskIo,\r | |
1760 | Volume,\r | |
1761 | &PreviousFile,\r | |
1762 | FileEntry,\r | |
1763 | File);\r | |
1764 | \r | |
1765 | FreePool (FileEntry);\r | |
1766 | \r | |
1767 | if (EFI_ERROR (Status)) {\r | |
1768 | return Status;\r | |
1769 | }\r | |
1770 | }\r | |
1771 | \r | |
1772 | if (CompareMem ((VOID *)&PreviousFile, (VOID *)Parent,\r | |
1773 | sizeof (UDF_FILE_INFO)) != 0) {\r | |
1774 | CleanupFileInformation (&PreviousFile);\r | |
1775 | }\r | |
1776 | \r | |
1777 | CopyMem ((VOID *)&PreviousFile, (VOID *)File, sizeof (UDF_FILE_INFO));\r | |
1778 | if (*FilePath != L'\0' && *FilePath == L'\\') {\r | |
1779 | FilePath++;\r | |
1780 | }\r | |
1781 | }\r | |
1782 | \r | |
1783 | return Status;\r | |
1784 | }\r | |
1785 | \r | |
1786 | /**\r | |
1787 | Read a directory entry at a time on an UDF volume.\r | |
1788 | \r | |
1789 | @param[in] BlockIo BlockIo interface.\r | |
1790 | @param[in] DiskIo DiskIo interface.\r | |
1791 | @param[in] Volume UDF volume information structure.\r | |
1792 | @param[in] ParentIcb ICB of the parent file.\r | |
1793 | @param[in] FileEntryData FE/EFE of the parent file.\r | |
077f8c43 | 1794 | @param[in, out] ReadDirInfo Next read directory listing structure\r |
99c9b949 PA |
1795 | information.\r |
1796 | @param[out] FoundFid File Identifier Descriptor pointer.\r | |
1797 | \r | |
1798 | @retval EFI_SUCCESS Directory entry read.\r | |
1799 | @retval EFI_UNSUPPORTED Extended Allocation Descriptors not supported.\r | |
1800 | @retval EFI_NO_MEDIA The device has no media.\r | |
1801 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
1802 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
1803 | @retval EFI_OUT_OF_RESOURCES The directory entry was not read due to lack of\r | |
1804 | resources.\r | |
1805 | \r | |
1806 | **/\r | |
1807 | EFI_STATUS\r | |
1808 | ReadDirectoryEntry (\r | |
1809 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
1810 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
1811 | IN UDF_VOLUME_INFO *Volume,\r | |
1812 | IN UDF_LONG_ALLOCATION_DESCRIPTOR *ParentIcb,\r | |
1813 | IN VOID *FileEntryData,\r | |
1814 | IN OUT UDF_READ_DIRECTORY_INFO *ReadDirInfo,\r | |
1815 | OUT UDF_FILE_IDENTIFIER_DESCRIPTOR **FoundFid\r | |
1816 | )\r | |
1817 | {\r | |
1818 | EFI_STATUS Status;\r | |
1819 | UDF_READ_FILE_INFO ReadFileInfo;\r | |
1820 | UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc;\r | |
1821 | \r | |
1822 | if (ReadDirInfo->DirectoryData == NULL) {\r | |
1823 | //\r | |
1824 | // The directory's recorded data has not been read yet. So let's cache it\r | |
1825 | // into memory and the next calls won't need to read it again.\r | |
1826 | //\r | |
880ec683 | 1827 | ReadFileInfo.Flags = ReadFileAllocateAndRead;\r |
99c9b949 PA |
1828 | \r |
1829 | Status = ReadFile (\r | |
1830 | BlockIo,\r | |
1831 | DiskIo,\r | |
1832 | Volume,\r | |
1833 | ParentIcb,\r | |
1834 | FileEntryData,\r | |
1835 | &ReadFileInfo\r | |
1836 | );\r | |
1837 | if (EFI_ERROR (Status)) {\r | |
1838 | return Status;\r | |
1839 | }\r | |
1840 | \r | |
1841 | //\r | |
1842 | // Fill in ReadDirInfo structure with the read directory's data information.\r | |
1843 | //\r | |
1844 | ReadDirInfo->DirectoryData = ReadFileInfo.FileData;\r | |
1845 | ReadDirInfo->DirectoryLength = ReadFileInfo.ReadLength;\r | |
1846 | }\r | |
1847 | \r | |
1848 | do {\r | |
1849 | if (ReadDirInfo->FidOffset >= ReadDirInfo->DirectoryLength) {\r | |
1850 | //\r | |
1851 | // There are no longer FIDs for this directory. By returning\r | |
1852 | // EFI_DEVICE_ERROR to the callee will indicate end of directory\r | |
1853 | // listening.\r | |
1854 | //\r | |
1855 | return EFI_DEVICE_ERROR;\r | |
1856 | }\r | |
1857 | \r | |
1858 | //\r | |
1859 | // Get FID for this entry.\r | |
1860 | //\r | |
1861 | FileIdentifierDesc = GET_FID_FROM_ADS (ReadDirInfo->DirectoryData,\r | |
1862 | ReadDirInfo->FidOffset);\r | |
1863 | //\r | |
1864 | // Update FidOffset to point to next FID.\r | |
1865 | //\r | |
1866 | ReadDirInfo->FidOffset += GetFidDescriptorLength (FileIdentifierDesc);\r | |
baaa3cee | 1867 | } while (FileIdentifierDesc->FileCharacteristics & DELETED_FILE);\r |
99c9b949 PA |
1868 | \r |
1869 | DuplicateFid (FileIdentifierDesc, FoundFid);\r | |
1870 | \r | |
1871 | return EFI_SUCCESS;\r | |
1872 | }\r | |
1873 | \r | |
1874 | /**\r | |
1875 | Get a filename (encoded in OSTA-compressed format) from a File Identifier\r | |
1876 | Descriptor on an UDF volume.\r | |
1877 | \r | |
1878 | @param[in] FileIdentifierDesc File Identifier Descriptor pointer.\r | |
1879 | @param[out] FileName Decoded filename.\r | |
1880 | \r | |
1881 | @retval EFI_SUCCESS Filename decoded and read.\r | |
1882 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
1883 | **/\r | |
1884 | EFI_STATUS\r | |
1885 | GetFileNameFromFid (\r | |
1886 | IN UDF_FILE_IDENTIFIER_DESCRIPTOR *FileIdentifierDesc,\r | |
1887 | OUT CHAR16 *FileName\r | |
1888 | )\r | |
1889 | {\r | |
1890 | UINT8 *OstaCompressed;\r | |
1891 | UINT8 CompressionId;\r | |
1892 | UINT8 Length;\r | |
1893 | UINTN Index;\r | |
1894 | \r | |
1895 | OstaCompressed =\r | |
1896 | (UINT8 *)(\r | |
1897 | (UINT8 *)FileIdentifierDesc->Data +\r | |
1898 | FileIdentifierDesc->LengthOfImplementationUse\r | |
1899 | );\r | |
1900 | \r | |
1901 | CompressionId = OstaCompressed[0];\r | |
1902 | if (!IS_VALID_COMPRESSION_ID (CompressionId)) {\r | |
1903 | return EFI_VOLUME_CORRUPTED;\r | |
1904 | }\r | |
1905 | \r | |
1906 | //\r | |
1907 | // Decode filename.\r | |
1908 | //\r | |
1909 | Length = FileIdentifierDesc->LengthOfFileIdentifier;\r | |
1910 | for (Index = 1; Index < Length; Index++) {\r | |
1911 | if (CompressionId == 16) {\r | |
1912 | *FileName = OstaCompressed[Index++] << 8;\r | |
1913 | } else {\r | |
1914 | *FileName = 0;\r | |
1915 | }\r | |
1916 | \r | |
1917 | if (Index < Length) {\r | |
fedec0a3 | 1918 | *FileName |= (CHAR16)(OstaCompressed[Index]);\r |
99c9b949 PA |
1919 | }\r |
1920 | \r | |
1921 | FileName++;\r | |
1922 | }\r | |
1923 | \r | |
1924 | *FileName = L'\0';\r | |
1925 | \r | |
1926 | return EFI_SUCCESS;\r | |
1927 | }\r | |
1928 | \r | |
1929 | /**\r | |
1930 | Resolve a symlink file on an UDF volume.\r | |
1931 | \r | |
1932 | @param[in] BlockIo BlockIo interface.\r | |
1933 | @param[in] DiskIo DiskIo interface.\r | |
1934 | @param[in] Volume UDF volume information structure.\r | |
1935 | @param[in] Parent Parent file.\r | |
1936 | @param[in] FileEntryData FE/EFE structure pointer.\r | |
1937 | @param[out] File Resolved file.\r | |
1938 | \r | |
1939 | @retval EFI_SUCCESS Symlink file resolved.\r | |
1940 | @retval EFI_UNSUPPORTED Extended Allocation Descriptors not supported.\r | |
1941 | @retval EFI_NO_MEDIA The device has no media.\r | |
1942 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
1943 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
1944 | @retval EFI_OUT_OF_RESOURCES The symlink file was not resolved due to lack of\r | |
1945 | resources.\r | |
1946 | \r | |
1947 | **/\r | |
1948 | EFI_STATUS\r | |
1949 | ResolveSymlink (\r | |
1950 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
1951 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
1952 | IN UDF_VOLUME_INFO *Volume,\r | |
1953 | IN UDF_FILE_INFO *Parent,\r | |
1954 | IN VOID *FileEntryData,\r | |
1955 | OUT UDF_FILE_INFO *File\r | |
1956 | )\r | |
1957 | {\r | |
1958 | EFI_STATUS Status;\r | |
1959 | UDF_READ_FILE_INFO ReadFileInfo;\r | |
1960 | UINT8 *Data;\r | |
1961 | UINT64 Length;\r | |
1962 | UINT8 *EndData;\r | |
1963 | UDF_PATH_COMPONENT *PathComp;\r | |
1964 | UINT8 PathCompLength;\r | |
1965 | CHAR16 FileName[UDF_FILENAME_LENGTH];\r | |
32492fee | 1966 | CHAR16 *Char;\r |
99c9b949 PA |
1967 | UINTN Index;\r |
1968 | UINT8 CompressionId;\r | |
1969 | UDF_FILE_INFO PreviousFile;\r | |
1970 | \r | |
1971 | //\r | |
1972 | // Symlink files on UDF volumes do not contain so much data other than\r | |
1973 | // Path Components which resolves to real filenames, so it's OK to read in\r | |
1974 | // all its data here -- usually the data will be inline with the FE/EFE for\r | |
1975 | // lower filenames.\r | |
1976 | //\r | |
880ec683 | 1977 | ReadFileInfo.Flags = ReadFileAllocateAndRead;\r |
99c9b949 PA |
1978 | \r |
1979 | Status = ReadFile (\r | |
1980 | BlockIo,\r | |
1981 | DiskIo,\r | |
1982 | Volume,\r | |
1983 | &Parent->FileIdentifierDesc->Icb,\r | |
1984 | FileEntryData,\r | |
1985 | &ReadFileInfo\r | |
1986 | );\r | |
1987 | if (EFI_ERROR (Status)) {\r | |
1988 | return Status;\r | |
1989 | }\r | |
1990 | \r | |
1991 | Length = ReadFileInfo.ReadLength;\r | |
1992 | \r | |
1993 | Data = (UINT8 *)ReadFileInfo.FileData;\r | |
1994 | EndData = Data + Length;\r | |
1995 | \r | |
1996 | CopyMem ((VOID *)&PreviousFile, (VOID *)Parent, sizeof (UDF_FILE_INFO));\r | |
1997 | \r | |
1998 | for (;;) {\r | |
1999 | PathComp = (UDF_PATH_COMPONENT *)Data;\r | |
2000 | \r | |
2001 | PathCompLength = PathComp->LengthOfComponentIdentifier;\r | |
2002 | \r | |
2003 | switch (PathComp->ComponentType) {\r | |
2004 | case 1:\r | |
2005 | //\r | |
2006 | // This Path Component specifies the root directory hierarchy subject to\r | |
2007 | // agreement between the originator and recipient of the medium. Skip it.\r | |
2008 | //\r | |
2009 | // Fall through.\r | |
2010 | //\r | |
2011 | case 2:\r | |
2012 | //\r | |
2013 | // "\\." of the current directory. Read next Path Component.\r | |
2014 | //\r | |
2015 | goto Next_Path_Component;\r | |
2016 | case 3:\r | |
2017 | //\r | |
2018 | // ".." (parent directory). Go to it.\r | |
2019 | //\r | |
2020 | CopyMem ((VOID *)FileName, L"..", 6);\r | |
2021 | break;\r | |
2022 | case 4:\r | |
2023 | //\r | |
2024 | // "." (current file). Duplicate both FE/EFE and FID of this file.\r | |
2025 | //\r | |
2026 | DuplicateFe (BlockIo, Volume, PreviousFile.FileEntry, &File->FileEntry);\r | |
2027 | DuplicateFid (PreviousFile.FileIdentifierDesc,\r | |
2028 | &File->FileIdentifierDesc);\r | |
2029 | goto Next_Path_Component;\r | |
2030 | case 5:\r | |
2031 | //\r | |
2032 | // This Path Component identifies an object, either a file or a\r | |
2033 | // directory or an alias.\r | |
2034 | //\r | |
2035 | // Decode it from the compressed data in ComponentIdentifier and find\r | |
2036 | // respective path.\r | |
2037 | //\r | |
2038 | CompressionId = PathComp->ComponentIdentifier[0];\r | |
2039 | if (!IS_VALID_COMPRESSION_ID (CompressionId)) {\r | |
2040 | return EFI_VOLUME_CORRUPTED;\r | |
2041 | }\r | |
2042 | \r | |
32492fee | 2043 | Char = FileName;\r |
99c9b949 PA |
2044 | for (Index = 1; Index < PathCompLength; Index++) {\r |
2045 | if (CompressionId == 16) {\r | |
32492fee | 2046 | *Char = *(UINT8 *)((UINT8 *)PathComp->ComponentIdentifier +\r |
99c9b949 PA |
2047 | Index) << 8;\r |
2048 | Index++;\r | |
2049 | } else {\r | |
32492fee | 2050 | *Char = 0;\r |
99c9b949 PA |
2051 | }\r |
2052 | \r | |
2053 | if (Index < Length) {\r | |
32492fee | 2054 | *Char |= (CHAR16)(*(UINT8 *)((UINT8 *)PathComp->ComponentIdentifier + Index));\r |
99c9b949 PA |
2055 | }\r |
2056 | \r | |
32492fee | 2057 | Char++;\r |
99c9b949 PA |
2058 | }\r |
2059 | \r | |
32492fee | 2060 | *Char = L'\0';\r |
99c9b949 PA |
2061 | break;\r |
2062 | }\r | |
2063 | \r | |
2064 | //\r | |
2065 | // Find file from the read filename in symlink's file data.\r | |
2066 | //\r | |
2067 | Status = InternalFindFile (\r | |
2068 | BlockIo,\r | |
2069 | DiskIo,\r | |
2070 | Volume,\r | |
2071 | FileName,\r | |
2072 | &PreviousFile,\r | |
2073 | NULL,\r | |
2074 | File\r | |
2075 | );\r | |
2076 | if (EFI_ERROR (Status)) {\r | |
2077 | goto Error_Find_File;\r | |
2078 | }\r | |
2079 | \r | |
2080 | Next_Path_Component:\r | |
2081 | Data += sizeof (UDF_PATH_COMPONENT) + PathCompLength;\r | |
2082 | if (Data >= EndData) {\r | |
2083 | break;\r | |
2084 | }\r | |
2085 | \r | |
2086 | if (CompareMem ((VOID *)&PreviousFile, (VOID *)Parent,\r | |
2087 | sizeof (UDF_FILE_INFO)) != 0) {\r | |
2088 | CleanupFileInformation (&PreviousFile);\r | |
2089 | }\r | |
2090 | \r | |
2091 | CopyMem ((VOID *)&PreviousFile, (VOID *)File, sizeof (UDF_FILE_INFO));\r | |
2092 | }\r | |
2093 | \r | |
2094 | //\r | |
2095 | // Unmap the symlink file.\r | |
2096 | //\r | |
2097 | FreePool (ReadFileInfo.FileData);\r | |
2098 | \r | |
2099 | return EFI_SUCCESS;\r | |
2100 | \r | |
2101 | Error_Find_File:\r | |
2102 | if (CompareMem ((VOID *)&PreviousFile, (VOID *)Parent,\r | |
2103 | sizeof (UDF_FILE_INFO)) != 0) {\r | |
2104 | CleanupFileInformation (&PreviousFile);\r | |
2105 | }\r | |
2106 | \r | |
2107 | FreePool (ReadFileInfo.FileData);\r | |
2108 | \r | |
2109 | return Status;\r | |
2110 | }\r | |
2111 | \r | |
99c9b949 PA |
2112 | /**\r |
2113 | Clean up in-memory UDF file information.\r | |
2114 | \r | |
2115 | @param[in] File File information pointer.\r | |
2116 | \r | |
2117 | **/\r | |
2118 | VOID\r | |
2119 | CleanupFileInformation (\r | |
2120 | IN UDF_FILE_INFO *File\r | |
2121 | )\r | |
2122 | {\r | |
2123 | if (File->FileEntry != NULL) {\r | |
2124 | FreePool (File->FileEntry);\r | |
2125 | }\r | |
2126 | if (File->FileIdentifierDesc != NULL) {\r | |
2127 | FreePool ((VOID *)File->FileIdentifierDesc);\r | |
2128 | }\r | |
2129 | \r | |
2130 | ZeroMem ((VOID *)File, sizeof (UDF_FILE_INFO));\r | |
2131 | }\r | |
2132 | \r | |
2133 | /**\r | |
2134 | Find a file from its absolute path on an UDF volume.\r | |
2135 | \r | |
2136 | @param[in] BlockIo BlockIo interface.\r | |
2137 | @param[in] DiskIo DiskIo interface.\r | |
2138 | @param[in] Volume UDF volume information structure.\r | |
2139 | @param[in] File File information structure.\r | |
2140 | @param[out] Size Size of the file.\r | |
2141 | \r | |
077f8c43 | 2142 | @retval EFI_SUCCESS File size calculated and set in Size.\r |
99c9b949 PA |
2143 | @retval EFI_UNSUPPORTED Extended Allocation Descriptors not supported.\r |
2144 | @retval EFI_NO_MEDIA The device has no media.\r | |
2145 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
2146 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
2147 | @retval EFI_OUT_OF_RESOURCES The file size was not calculated due to lack of\r | |
2148 | resources.\r | |
2149 | \r | |
2150 | **/\r | |
2151 | EFI_STATUS\r | |
2152 | GetFileSize (\r | |
2153 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
2154 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
2155 | IN UDF_VOLUME_INFO *Volume,\r | |
2156 | IN UDF_FILE_INFO *File,\r | |
2157 | OUT UINT64 *Size\r | |
2158 | )\r | |
2159 | {\r | |
2160 | EFI_STATUS Status;\r | |
2161 | UDF_READ_FILE_INFO ReadFileInfo;\r | |
2162 | \r | |
880ec683 | 2163 | ReadFileInfo.Flags = ReadFileGetFileSize;\r |
99c9b949 PA |
2164 | \r |
2165 | Status = ReadFile (\r | |
2166 | BlockIo,\r | |
2167 | DiskIo,\r | |
2168 | Volume,\r | |
2169 | &File->FileIdentifierDesc->Icb,\r | |
2170 | File->FileEntry,\r | |
2171 | &ReadFileInfo\r | |
2172 | );\r | |
2173 | if (EFI_ERROR (Status)) {\r | |
2174 | return Status;\r | |
2175 | }\r | |
2176 | \r | |
2177 | *Size = ReadFileInfo.ReadLength;\r | |
2178 | \r | |
2179 | return EFI_SUCCESS;\r | |
2180 | }\r | |
2181 | \r | |
2182 | /**\r | |
2183 | Set information about a file on an UDF volume.\r | |
2184 | \r | |
2185 | @param[in] File File pointer.\r | |
2186 | @param[in] FileSize Size of the file.\r | |
2187 | @param[in] FileName Filename of the file.\r | |
077f8c43 | 2188 | @param[in, out] BufferSize Size of the returned file infomation.\r |
99c9b949 PA |
2189 | @param[out] Buffer Data of the returned file information.\r |
2190 | \r | |
2191 | @retval EFI_SUCCESS File information set.\r | |
2192 | @retval EFI_NO_MEDIA The device has no media.\r | |
2193 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
2194 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
2195 | @retval EFI_OUT_OF_RESOURCES The file information was not set due to lack of\r | |
2196 | resources.\r | |
2197 | \r | |
2198 | **/\r | |
2199 | EFI_STATUS\r | |
2200 | SetFileInfo (\r | |
2201 | IN UDF_FILE_INFO *File,\r | |
2202 | IN UINT64 FileSize,\r | |
2203 | IN CHAR16 *FileName,\r | |
2204 | IN OUT UINTN *BufferSize,\r | |
2205 | OUT VOID *Buffer\r | |
2206 | )\r | |
2207 | {\r | |
2208 | UINTN FileInfoLength;\r | |
2209 | EFI_FILE_INFO *FileInfo;\r | |
2210 | UDF_FILE_ENTRY *FileEntry;\r | |
2211 | UDF_EXTENDED_FILE_ENTRY *ExtendedFileEntry;\r | |
baaa3cee | 2212 | UDF_DESCRIPTOR_TAG *DescriptorTag;\r |
99c9b949 PA |
2213 | \r |
2214 | //\r | |
2215 | // Calculate the needed size for the EFI_FILE_INFO structure.\r | |
2216 | //\r | |
12b83f56 | 2217 | FileInfoLength = sizeof (EFI_FILE_INFO) + ((FileName != NULL) ?\r |
99c9b949 PA |
2218 | StrSize (FileName) :\r |
2219 | sizeof (CHAR16));\r | |
2220 | if (*BufferSize < FileInfoLength) {\r | |
2221 | //\r | |
2222 | // The given Buffer has no size enough for EFI_FILE_INFO structure.\r | |
2223 | //\r | |
2224 | *BufferSize = FileInfoLength;\r | |
2225 | return EFI_BUFFER_TOO_SMALL;\r | |
2226 | }\r | |
2227 | \r | |
2228 | //\r | |
2229 | // Buffer now contains room enough to store EFI_FILE_INFO structure.\r | |
2230 | // Now, fill it in with all necessary information about the file.\r | |
2231 | //\r | |
2232 | FileInfo = (EFI_FILE_INFO *)Buffer;\r | |
2233 | FileInfo->Size = FileInfoLength;\r | |
2234 | FileInfo->Attribute &= ~EFI_FILE_VALID_ATTR;\r | |
2235 | FileInfo->Attribute |= EFI_FILE_READ_ONLY;\r | |
2236 | \r | |
2237 | if (IS_FID_DIRECTORY_FILE (File->FileIdentifierDesc)) {\r | |
2238 | FileInfo->Attribute |= EFI_FILE_DIRECTORY;\r | |
2239 | } else if (IS_FID_NORMAL_FILE (File->FileIdentifierDesc)) {\r | |
2240 | FileInfo->Attribute |= EFI_FILE_ARCHIVE;\r | |
2241 | }\r | |
2242 | \r | |
2243 | if (IS_FID_HIDDEN_FILE (File->FileIdentifierDesc)) {\r | |
2244 | FileInfo->Attribute |= EFI_FILE_HIDDEN;\r | |
2245 | }\r | |
2246 | \r | |
baaa3cee PA |
2247 | DescriptorTag = File->FileEntry;\r |
2248 | \r | |
2249 | if (DescriptorTag->TagIdentifier == UdfFileEntry) {\r | |
99c9b949 PA |
2250 | FileEntry = (UDF_FILE_ENTRY *)File->FileEntry;\r |
2251 | \r | |
2252 | //\r | |
2253 | // Check if FE has the system attribute set.\r | |
2254 | //\r | |
2255 | if (FileEntry->IcbTag.Flags & (1 << 10)) {\r | |
2256 | FileInfo->Attribute |= EFI_FILE_SYSTEM;\r | |
2257 | }\r | |
2258 | \r | |
2259 | FileInfo->FileSize = FileSize;\r | |
2260 | FileInfo->PhysicalSize = FileSize;\r | |
2261 | \r | |
2262 | FileInfo->CreateTime.Year = FileEntry->AccessTime.Year;\r | |
2263 | FileInfo->CreateTime.Month = FileEntry->AccessTime.Month;\r | |
2264 | FileInfo->CreateTime.Day = FileEntry->AccessTime.Day;\r | |
2265 | FileInfo->CreateTime.Hour = FileEntry->AccessTime.Hour;\r | |
2266 | FileInfo->CreateTime.Minute = FileEntry->AccessTime.Second;\r | |
2267 | FileInfo->CreateTime.Second = FileEntry->AccessTime.Second;\r | |
2268 | FileInfo->CreateTime.Nanosecond =\r | |
2269 | FileEntry->AccessTime.HundredsOfMicroseconds;\r | |
2270 | \r | |
2271 | FileInfo->LastAccessTime.Year =\r | |
2272 | FileEntry->AccessTime.Year;\r | |
2273 | FileInfo->LastAccessTime.Month =\r | |
2274 | FileEntry->AccessTime.Month;\r | |
2275 | FileInfo->LastAccessTime.Day =\r | |
2276 | FileEntry->AccessTime.Day;\r | |
2277 | FileInfo->LastAccessTime.Hour =\r | |
2278 | FileEntry->AccessTime.Hour;\r | |
2279 | FileInfo->LastAccessTime.Minute =\r | |
2280 | FileEntry->AccessTime.Minute;\r | |
2281 | FileInfo->LastAccessTime.Second =\r | |
2282 | FileEntry->AccessTime.Second;\r | |
2283 | FileInfo->LastAccessTime.Nanosecond =\r | |
2284 | FileEntry->AccessTime.HundredsOfMicroseconds;\r | |
baaa3cee | 2285 | } else if (DescriptorTag->TagIdentifier == UdfExtendedFileEntry) {\r |
99c9b949 PA |
2286 | ExtendedFileEntry = (UDF_EXTENDED_FILE_ENTRY *)File->FileEntry;\r |
2287 | \r | |
2288 | //\r | |
2289 | // Check if EFE has the system attribute set.\r | |
2290 | //\r | |
2291 | if (ExtendedFileEntry->IcbTag.Flags & (1 << 10)) {\r | |
2292 | FileInfo->Attribute |= EFI_FILE_SYSTEM;\r | |
2293 | }\r | |
2294 | \r | |
2295 | FileInfo->FileSize = FileSize;\r | |
2296 | FileInfo->PhysicalSize = FileSize;\r | |
2297 | \r | |
2298 | FileInfo->CreateTime.Year = ExtendedFileEntry->CreationTime.Year;\r | |
2299 | FileInfo->CreateTime.Month = ExtendedFileEntry->CreationTime.Month;\r | |
2300 | FileInfo->CreateTime.Day = ExtendedFileEntry->CreationTime.Day;\r | |
2301 | FileInfo->CreateTime.Hour = ExtendedFileEntry->CreationTime.Hour;\r | |
2302 | FileInfo->CreateTime.Minute = ExtendedFileEntry->CreationTime.Second;\r | |
2303 | FileInfo->CreateTime.Second = ExtendedFileEntry->CreationTime.Second;\r | |
2304 | FileInfo->CreateTime.Nanosecond =\r | |
2305 | ExtendedFileEntry->AccessTime.HundredsOfMicroseconds;\r | |
2306 | \r | |
2307 | FileInfo->LastAccessTime.Year =\r | |
2308 | ExtendedFileEntry->AccessTime.Year;\r | |
2309 | FileInfo->LastAccessTime.Month =\r | |
2310 | ExtendedFileEntry->AccessTime.Month;\r | |
2311 | FileInfo->LastAccessTime.Day =\r | |
2312 | ExtendedFileEntry->AccessTime.Day;\r | |
2313 | FileInfo->LastAccessTime.Hour =\r | |
2314 | ExtendedFileEntry->AccessTime.Hour;\r | |
2315 | FileInfo->LastAccessTime.Minute =\r | |
2316 | ExtendedFileEntry->AccessTime.Minute;\r | |
2317 | FileInfo->LastAccessTime.Second =\r | |
2318 | ExtendedFileEntry->AccessTime.Second;\r | |
2319 | FileInfo->LastAccessTime.Nanosecond =\r | |
2320 | ExtendedFileEntry->AccessTime.HundredsOfMicroseconds;\r | |
2321 | }\r | |
2322 | \r | |
2323 | FileInfo->CreateTime.TimeZone = EFI_UNSPECIFIED_TIMEZONE;\r | |
2324 | FileInfo->CreateTime.Daylight = EFI_TIME_ADJUST_DAYLIGHT;\r | |
2325 | FileInfo->LastAccessTime.TimeZone = EFI_UNSPECIFIED_TIMEZONE;\r | |
2326 | FileInfo->LastAccessTime.Daylight = EFI_TIME_ADJUST_DAYLIGHT;\r | |
2327 | \r | |
2328 | CopyMem ((VOID *)&FileInfo->ModificationTime,\r | |
2329 | (VOID *)&FileInfo->LastAccessTime,\r | |
2330 | sizeof (EFI_TIME));\r | |
2331 | \r | |
2332 | if (FileName != NULL) {\r | |
2333 | StrCpyS (FileInfo->FileName, StrLen (FileName) + 1, FileName);\r | |
2334 | } else {\r | |
2335 | FileInfo->FileName[0] = '\0';\r | |
2336 | }\r | |
2337 | \r | |
2338 | *BufferSize = FileInfoLength;\r | |
2339 | \r | |
2340 | return EFI_SUCCESS;\r | |
2341 | }\r | |
2342 | \r | |
2343 | /**\r | |
2344 | Get volume and free space size information of an UDF volume.\r | |
2345 | \r | |
2346 | @param[in] BlockIo BlockIo interface.\r | |
2347 | @param[in] DiskIo DiskIo interface.\r | |
2348 | @param[in] Volume UDF volume information structure.\r | |
2349 | @param[out] VolumeSize Volume size.\r | |
2350 | @param[out] FreeSpaceSize Free space size.\r | |
2351 | \r | |
2352 | @retval EFI_SUCCESS Volume and free space size calculated.\r | |
2353 | @retval EFI_NO_MEDIA The device has no media.\r | |
2354 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
2355 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
2356 | @retval EFI_OUT_OF_RESOURCES The volume and free space size were not\r | |
2357 | calculated due to lack of resources.\r | |
2358 | \r | |
2359 | **/\r | |
2360 | EFI_STATUS\r | |
2361 | GetVolumeSize (\r | |
2362 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
2363 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
2364 | IN UDF_VOLUME_INFO *Volume,\r | |
2365 | OUT UINT64 *VolumeSize,\r | |
2366 | OUT UINT64 *FreeSpaceSize\r | |
2367 | )\r | |
2368 | {\r | |
baaa3cee PA |
2369 | EFI_STATUS Status;\r |
2370 | UDF_LOGICAL_VOLUME_DESCRIPTOR *LogicalVolDesc;\r | |
2371 | UDF_EXTENT_AD *ExtentAd;\r | |
2372 | UINT64 Lsn;\r | |
2373 | UINT32 LogicalBlockSize;\r | |
2374 | UDF_LOGICAL_VOLUME_INTEGRITY *LogicalVolInt;\r | |
2375 | UDF_DESCRIPTOR_TAG *DescriptorTag;\r | |
2376 | UINTN Index;\r | |
2377 | UINTN Length;\r | |
2378 | UINT32 LsnsNo;\r | |
99c9b949 | 2379 | \r |
baaa3cee | 2380 | LogicalVolDesc = &Volume->LogicalVolDesc;\r |
99c9b949 | 2381 | \r |
baaa3cee | 2382 | ExtentAd = &LogicalVolDesc->IntegritySequenceExtent;\r |
99c9b949 | 2383 | \r |
baaa3cee PA |
2384 | if (ExtentAd->ExtentLength == 0) {\r |
2385 | return EFI_VOLUME_CORRUPTED;\r | |
2386 | }\r | |
99c9b949 | 2387 | \r |
baaa3cee PA |
2388 | LogicalVolInt = AllocatePool (ExtentAd->ExtentLength);\r |
2389 | if (LogicalVolInt == NULL) {\r | |
2390 | return EFI_OUT_OF_RESOURCES;\r | |
2391 | }\r | |
99c9b949 | 2392 | \r |
baaa3cee PA |
2393 | //\r |
2394 | // Get location of Logical Volume Integrity Descriptor\r | |
2395 | //\r | |
2396 | Lsn = (UINT64)ExtentAd->ExtentLocation - Volume->MainVdsStartLocation;\r | |
99c9b949 | 2397 | \r |
baaa3cee | 2398 | LogicalBlockSize = LogicalVolDesc->LogicalBlockSize;\r |
99c9b949 | 2399 | \r |
baaa3cee PA |
2400 | //\r |
2401 | // Read disk block\r | |
2402 | //\r | |
2403 | Status = DiskIo->ReadDisk (\r | |
2404 | DiskIo,\r | |
2405 | BlockIo->Media->MediaId,\r | |
2406 | MultU64x32 (Lsn, LogicalBlockSize),\r | |
2407 | ExtentAd->ExtentLength,\r | |
2408 | LogicalVolInt\r | |
2409 | );\r | |
2410 | if (EFI_ERROR (Status)) {\r | |
2411 | goto Out_Free;\r | |
2412 | }\r | |
99c9b949 | 2413 | \r |
baaa3cee | 2414 | DescriptorTag = &LogicalVolInt->DescriptorTag;\r |
99c9b949 | 2415 | \r |
baaa3cee PA |
2416 | //\r |
2417 | // Check if read block is a Logical Volume Integrity Descriptor\r | |
2418 | //\r | |
2419 | if (DescriptorTag->TagIdentifier != UdfLogicalVolumeIntegrityDescriptor) {\r | |
2420 | Status = EFI_VOLUME_CORRUPTED;\r | |
2421 | goto Out_Free;\r | |
2422 | }\r | |
2423 | \r | |
2424 | *VolumeSize = 0;\r | |
2425 | *FreeSpaceSize = 0;\r | |
99c9b949 | 2426 | \r |
baaa3cee PA |
2427 | Length = LogicalVolInt->NumberOfPartitions;\r |
2428 | for (Index = 0; Index < Length; Index += sizeof (UINT32)) {\r | |
2429 | LsnsNo = *(UINT32 *)((UINT8 *)LogicalVolInt->Data + Index);\r | |
2430 | //\r | |
2431 | // Check if size is not specified\r | |
2432 | //\r | |
2433 | if (LsnsNo == 0xFFFFFFFFUL) {\r | |
2434 | continue;\r | |
99c9b949 | 2435 | }\r |
baaa3cee PA |
2436 | //\r |
2437 | // Accumulate free space size\r | |
2438 | //\r | |
2439 | *FreeSpaceSize += MultU64x32 ((UINT64)LsnsNo, LogicalBlockSize);\r | |
2440 | }\r | |
99c9b949 | 2441 | \r |
baaa3cee PA |
2442 | Length = LogicalVolInt->NumberOfPartitions * sizeof (UINT32) * 2;\r |
2443 | for (; Index < Length; Index += sizeof (UINT32)) {\r | |
2444 | LsnsNo = *(UINT32 *)((UINT8 *)LogicalVolInt->Data + Index);\r | |
2445 | //\r | |
2446 | // Check if size is not specified\r | |
2447 | //\r | |
2448 | if (LsnsNo == 0xFFFFFFFFUL) {\r | |
2449 | continue;\r | |
2450 | }\r | |
2451 | //\r | |
2452 | // Accumulate used volume space\r | |
2453 | //\r | |
2454 | *VolumeSize += MultU64x32 ((UINT64)LsnsNo, LogicalBlockSize);\r | |
99c9b949 PA |
2455 | }\r |
2456 | \r | |
baaa3cee PA |
2457 | Status = EFI_SUCCESS;\r |
2458 | \r | |
2459 | Out_Free:\r | |
2460 | //\r | |
2461 | // Free Logical Volume Integrity Descriptor\r | |
2462 | //\r | |
2463 | FreePool (LogicalVolInt);\r | |
2464 | \r | |
2465 | return Status;\r | |
99c9b949 PA |
2466 | }\r |
2467 | \r | |
2468 | /**\r | |
2469 | Seek a file and read its data into memory on an UDF volume.\r | |
2470 | \r | |
2471 | @param[in] BlockIo BlockIo interface.\r | |
2472 | @param[in] DiskIo DiskIo interface.\r | |
2473 | @param[in] Volume UDF volume information structure.\r | |
2474 | @param[in] File File information structure.\r | |
2475 | @param[in] FileSize Size of the file.\r | |
077f8c43 HW |
2476 | @param[in, out] FilePosition File position.\r |
2477 | @param[in, out] Buffer File data.\r | |
2478 | @param[in, out] BufferSize Read size.\r | |
99c9b949 PA |
2479 | \r |
2480 | @retval EFI_SUCCESS File seeked and read.\r | |
2481 | @retval EFI_UNSUPPORTED Extended Allocation Descriptors not supported.\r | |
2482 | @retval EFI_NO_MEDIA The device has no media.\r | |
2483 | @retval EFI_DEVICE_ERROR The device reported an error.\r | |
2484 | @retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r | |
2485 | @retval EFI_OUT_OF_RESOURCES The file's recorded data was not read due to lack\r | |
2486 | of resources.\r | |
2487 | \r | |
2488 | **/\r | |
2489 | EFI_STATUS\r | |
2490 | ReadFileData (\r | |
2491 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
2492 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
2493 | IN UDF_VOLUME_INFO *Volume,\r | |
2494 | IN UDF_FILE_INFO *File,\r | |
2495 | IN UINT64 FileSize,\r | |
2496 | IN OUT UINT64 *FilePosition,\r | |
2497 | IN OUT VOID *Buffer,\r | |
2498 | IN OUT UINT64 *BufferSize\r | |
2499 | )\r | |
2500 | {\r | |
2501 | EFI_STATUS Status;\r | |
2502 | UDF_READ_FILE_INFO ReadFileInfo;\r | |
2503 | \r | |
880ec683 | 2504 | ReadFileInfo.Flags = ReadFileSeekAndRead;\r |
99c9b949 PA |
2505 | ReadFileInfo.FilePosition = *FilePosition;\r |
2506 | ReadFileInfo.FileData = Buffer;\r | |
2507 | ReadFileInfo.FileDataSize = *BufferSize;\r | |
2508 | ReadFileInfo.FileSize = FileSize;\r | |
2509 | \r | |
2510 | Status = ReadFile (\r | |
2511 | BlockIo,\r | |
2512 | DiskIo,\r | |
2513 | Volume,\r | |
2514 | &File->FileIdentifierDesc->Icb,\r | |
2515 | File->FileEntry,\r | |
2516 | &ReadFileInfo\r | |
2517 | );\r | |
2518 | if (EFI_ERROR (Status)) {\r | |
2519 | return Status;\r | |
2520 | }\r | |
2521 | \r | |
2522 | *BufferSize = ReadFileInfo.FileDataSize;\r | |
2523 | *FilePosition = ReadFileInfo.FilePosition;\r | |
2524 | \r | |
2525 | return EFI_SUCCESS;\r | |
2526 | }\r | |
2527 | \r | |
2528 | /**\r | |
2529 | Check if ControllerHandle supports an UDF file system.\r | |
2530 | \r | |
2531 | @param[in] This Protocol instance pointer.\r | |
2532 | @param[in] ControllerHandle Handle of device to test.\r | |
2533 | \r | |
2534 | @retval EFI_SUCCESS UDF file system found.\r | |
2535 | @retval EFI_UNSUPPORTED UDF file system not found.\r | |
2536 | \r | |
2537 | **/\r | |
2538 | EFI_STATUS\r | |
2539 | SupportUdfFileSystem (\r | |
2540 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
2541 | IN EFI_HANDLE ControllerHandle\r | |
2542 | )\r | |
2543 | {\r | |
2544 | EFI_STATUS Status;\r | |
2545 | EFI_DEVICE_PATH_PROTOCOL *DevicePath;\r | |
2546 | EFI_DEVICE_PATH_PROTOCOL *DevicePathNode;\r | |
2547 | EFI_DEVICE_PATH_PROTOCOL *LastDevicePathNode;\r | |
2548 | EFI_GUID *VendorDefinedGuid;\r | |
99c9b949 PA |
2549 | \r |
2550 | //\r | |
2551 | // Open Device Path protocol on ControllerHandle\r | |
2552 | //\r | |
2553 | Status = gBS->OpenProtocol (\r | |
2554 | ControllerHandle,\r | |
2555 | &gEfiDevicePathProtocolGuid,\r | |
2556 | (VOID **)&DevicePath,\r | |
2557 | This->DriverBindingHandle,\r | |
2558 | ControllerHandle,\r | |
2559 | EFI_OPEN_PROTOCOL_GET_PROTOCOL\r | |
2560 | );\r | |
2561 | if (EFI_ERROR (Status)) {\r | |
2562 | return EFI_UNSUPPORTED;\r | |
2563 | }\r | |
2564 | \r | |
2565 | Status = EFI_UNSUPPORTED;\r | |
2566 | \r | |
2567 | //\r | |
2568 | // Get last Device Path node\r | |
2569 | //\r | |
2570 | LastDevicePathNode = NULL;\r | |
2571 | DevicePathNode = DevicePath;\r | |
2572 | while (!IsDevicePathEnd (DevicePathNode)) {\r | |
2573 | LastDevicePathNode = DevicePathNode;\r | |
2574 | DevicePathNode = NextDevicePathNode (DevicePathNode);\r | |
2575 | }\r | |
2576 | //\r | |
2577 | // Check if last Device Path node contains a Vendor-Defined Media Device Path\r | |
2578 | // of an UDF file system.\r | |
2579 | //\r | |
2580 | if (LastDevicePathNode != NULL &&\r | |
2581 | DevicePathType (LastDevicePathNode) == MEDIA_DEVICE_PATH &&\r | |
2582 | DevicePathSubType (LastDevicePathNode) == MEDIA_VENDOR_DP) {\r | |
2583 | VendorDefinedGuid = (EFI_GUID *)((UINTN)LastDevicePathNode +\r | |
2584 | OFFSET_OF (VENDOR_DEVICE_PATH, Guid));\r | |
3f92b104 | 2585 | if (CompareGuid (VendorDefinedGuid, &gUdfDevPathGuid)) {\r |
99c9b949 PA |
2586 | Status = EFI_SUCCESS;\r |
2587 | }\r | |
2588 | }\r | |
2589 | \r | |
2590 | //\r | |
2591 | // Close Device Path protocol on ControllerHandle\r | |
2592 | //\r | |
2593 | gBS->CloseProtocol (\r | |
2594 | ControllerHandle,\r | |
2595 | &gEfiDevicePathProtocolGuid,\r | |
2596 | This->DriverBindingHandle,\r | |
2597 | ControllerHandle\r | |
2598 | );\r | |
2599 | \r | |
2600 | return Status;\r | |
2601 | }\r |