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b9575d60 | 1 | /** @file\r |
79840ee1 | 2 | Decode a hard disk partitioned with the GPT scheme in the EFI 1.0\r |
3 | specification.\r | |
4 | \r | |
b9575d60 A |
5 | Copyright (c) 2006 - 2007, Intel Corporation \r |
6 | All rights reserved. This program and the accompanying materials \r | |
7 | are licensed and made available under the terms and conditions of the BSD License \r | |
8 | which accompanies this 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, \r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
13 | \r | |
14 | **/\r | |
79840ee1 | 15 | \r |
79840ee1 | 16 | \r |
d8a43975 | 17 | //\r |
18 | // Include common header file for this module.\r | |
19 | //\r | |
20 | #include "CommonHeader.h"\r | |
21 | \r | |
79840ee1 | 22 | #include "Partition.h"\r |
23 | \r | |
b9575d60 | 24 | \r |
79840ee1 | 25 | BOOLEAN\r |
26 | PartitionValidGptTable (\r | |
27 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
28 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
29 | IN EFI_LBA Lba,\r | |
30 | OUT EFI_PARTITION_TABLE_HEADER *PartHeader\r | |
31 | );\r | |
32 | \r | |
b9575d60 | 33 | \r |
79840ee1 | 34 | BOOLEAN\r |
35 | PartitionCheckGptEntryArrayCRC (\r | |
36 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
37 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
38 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r | |
39 | );\r | |
40 | \r | |
b9575d60 | 41 | \r |
79840ee1 | 42 | BOOLEAN\r |
43 | PartitionRestoreGptTable (\r | |
44 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
45 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
46 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r | |
47 | );\r | |
48 | \r | |
b9575d60 | 49 | \r |
79840ee1 | 50 | VOID\r |
51 | PartitionCheckGptEntry (\r | |
52 | IN EFI_PARTITION_TABLE_HEADER *PartHeader,\r | |
53 | IN EFI_PARTITION_ENTRY *PartEntry,\r | |
54 | OUT EFI_PARTITION_ENTRY_STATUS *PEntryStatus\r | |
55 | );\r | |
56 | \r | |
b9575d60 | 57 | \r |
79840ee1 | 58 | BOOLEAN\r |
59 | PartitionCheckCrcAltSize (\r | |
60 | IN UINTN MaxSize,\r | |
61 | IN UINTN Size,\r | |
62 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
63 | );\r | |
64 | \r | |
b9575d60 | 65 | \r |
79840ee1 | 66 | BOOLEAN\r |
67 | PartitionCheckCrc (\r | |
68 | IN UINTN MaxSize,\r | |
69 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
70 | );\r | |
71 | \r | |
b9575d60 | 72 | \r |
79840ee1 | 73 | VOID\r |
74 | PartitionSetCrcAltSize (\r | |
75 | IN UINTN Size,\r | |
76 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
77 | );\r | |
78 | \r | |
b9575d60 | 79 | \r |
79840ee1 | 80 | VOID\r |
81 | PartitionSetCrc (\r | |
82 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
83 | );\r | |
84 | \r | |
b9575d60 A |
85 | /**\r |
86 | Install child handles if the Handle supports GPT partition structure.\r | |
87 | \r | |
88 | @param[in] This - Calling context.\r | |
89 | @param[in] Handle - Parent Handle\r | |
90 | @param[in] DiskIo - Parent DiskIo interface\r | |
91 | @param[in] BlockIo - Parent BlockIo interface\r | |
92 | @param[in] DevicePath - Parent Device Path\r | |
93 | \r | |
94 | @retval EFI_SUCCESS Valid GPT disk\r | |
95 | @retval EFI_MEDIA_CHANGED Media changed Detected\r | |
96 | @retval other Not a valid GPT disk\r | |
97 | \r | |
98 | **/\r | |
79840ee1 | 99 | EFI_STATUS\r |
100 | PartitionInstallGptChildHandles (\r | |
101 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r | |
102 | IN EFI_HANDLE Handle,\r | |
103 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
104 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
105 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath\r | |
106 | )\r | |
79840ee1 | 107 | {\r |
108 | EFI_STATUS Status;\r | |
109 | UINT32 BlockSize;\r | |
110 | EFI_LBA LastBlock;\r | |
111 | MASTER_BOOT_RECORD *ProtectiveMbr;\r | |
112 | EFI_PARTITION_TABLE_HEADER *PrimaryHeader;\r | |
113 | EFI_PARTITION_TABLE_HEADER *BackupHeader;\r | |
114 | EFI_PARTITION_ENTRY *PartEntry;\r | |
115 | EFI_PARTITION_ENTRY_STATUS *PEntryStatus;\r | |
116 | UINTN Index;\r | |
117 | EFI_STATUS GptValid;\r | |
118 | HARDDRIVE_DEVICE_PATH HdDev;\r | |
119 | \r | |
120 | ProtectiveMbr = NULL;\r | |
121 | PrimaryHeader = NULL;\r | |
122 | BackupHeader = NULL;\r | |
123 | PartEntry = NULL;\r | |
124 | PEntryStatus = NULL;\r | |
125 | \r | |
126 | BlockSize = BlockIo->Media->BlockSize;\r | |
127 | LastBlock = BlockIo->Media->LastBlock;\r | |
128 | \r | |
129 | DEBUG ((EFI_D_INFO, " BlockSize : %d \n", BlockSize));\r | |
130 | DEBUG ((EFI_D_INFO, " LastBlock : %x \n", LastBlock));\r | |
131 | \r | |
132 | GptValid = EFI_NOT_FOUND;\r | |
133 | \r | |
134 | //\r | |
135 | // Allocate a buffer for the Protective MBR\r | |
136 | //\r | |
137 | ProtectiveMbr = AllocatePool (BlockSize);\r | |
138 | if (ProtectiveMbr == NULL) {\r | |
139 | return EFI_NOT_FOUND;\r | |
140 | }\r | |
141 | \r | |
142 | //\r | |
143 | // Read the Protective MBR from LBA #0\r | |
144 | //\r | |
145 | Status = BlockIo->ReadBlocks (\r | |
146 | BlockIo,\r | |
147 | BlockIo->Media->MediaId,\r | |
148 | 0,\r | |
149 | BlockIo->Media->BlockSize,\r | |
150 | ProtectiveMbr\r | |
151 | );\r | |
152 | if (EFI_ERROR (Status)) {\r | |
153 | GptValid = Status;\r | |
154 | goto Done;\r | |
155 | }\r | |
156 | //\r | |
157 | // Verify that the Protective MBR is valid\r | |
158 | //\r | |
159 | if (ProtectiveMbr->Partition[0].BootIndicator != 0x00 ||\r | |
160 | ProtectiveMbr->Partition[0].OSIndicator != PMBR_GPT_PARTITION ||\r | |
161 | UNPACK_UINT32 (ProtectiveMbr->Partition[0].StartingLBA) != 1\r | |
162 | ) {\r | |
163 | goto Done;\r | |
164 | }\r | |
165 | \r | |
166 | //\r | |
167 | // Allocate the GPT structures\r | |
168 | //\r | |
169 | PrimaryHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));\r | |
170 | if (PrimaryHeader == NULL) {\r | |
171 | goto Done;\r | |
172 | }\r | |
173 | \r | |
174 | BackupHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));\r | |
175 | \r | |
176 | if (BackupHeader == NULL) {\r | |
177 | goto Done;\r | |
178 | }\r | |
179 | \r | |
180 | //\r | |
181 | // Check primary and backup partition tables\r | |
182 | //\r | |
183 | if (!PartitionValidGptTable (BlockIo, DiskIo, PRIMARY_PART_HEADER_LBA, PrimaryHeader)) {\r | |
184 | DEBUG ((EFI_D_INFO, " Not Valid primary partition table\n"));\r | |
185 | \r | |
186 | if (!PartitionValidGptTable (BlockIo, DiskIo, LastBlock, BackupHeader)) {\r | |
187 | DEBUG ((EFI_D_INFO, " Not Valid backup partition table\n"));\r | |
188 | goto Done;\r | |
189 | } else {\r | |
190 | DEBUG ((EFI_D_INFO, " Valid backup partition table\n"));\r | |
191 | DEBUG ((EFI_D_INFO, " Restore primary partition table by the backup\n"));\r | |
192 | if (!PartitionRestoreGptTable (BlockIo, DiskIo, BackupHeader)) {\r | |
193 | DEBUG ((EFI_D_INFO, " Restore primary partition table error\n"));\r | |
194 | }\r | |
195 | \r | |
196 | if (PartitionValidGptTable (BlockIo, DiskIo, BackupHeader->AlternateLBA, PrimaryHeader)) {\r | |
197 | DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));\r | |
198 | }\r | |
199 | }\r | |
200 | } else if (!PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {\r | |
201 | DEBUG ((EFI_D_INFO, " Valid primary and !Valid backup partition table\n"));\r | |
202 | DEBUG ((EFI_D_INFO, " Restore backup partition table by the primary\n"));\r | |
203 | if (!PartitionRestoreGptTable (BlockIo, DiskIo, PrimaryHeader)) {\r | |
204 | DEBUG ((EFI_D_INFO, " Restore backup partition table error\n"));\r | |
205 | }\r | |
206 | \r | |
207 | if (PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {\r | |
208 | DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));\r | |
209 | }\r | |
210 | \r | |
211 | }\r | |
212 | \r | |
213 | DEBUG ((EFI_D_INFO, " Valid primary and Valid backup partition table\n"));\r | |
214 | \r | |
215 | //\r | |
216 | // Read the EFI Partition Entries\r | |
217 | //\r | |
218 | PartEntry = AllocatePool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY));\r | |
219 | if (PartEntry == NULL) {\r | |
220 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r | |
221 | goto Done;\r | |
222 | }\r | |
223 | \r | |
224 | Status = DiskIo->ReadDisk (\r | |
225 | DiskIo,\r | |
226 | BlockIo->Media->MediaId,\r | |
227 | MultU64x32(PrimaryHeader->PartitionEntryLBA, BlockSize),\r | |
228 | PrimaryHeader->NumberOfPartitionEntries * (PrimaryHeader->SizeOfPartitionEntry),\r | |
229 | PartEntry\r | |
230 | );\r | |
231 | if (EFI_ERROR (Status)) {\r | |
232 | GptValid = Status;\r | |
233 | DEBUG ((EFI_D_INFO, " Partition Entry ReadBlocks error\n"));\r | |
234 | goto Done;\r | |
235 | }\r | |
236 | \r | |
237 | DEBUG ((EFI_D_INFO, " Partition entries read block success\n"));\r | |
238 | \r | |
239 | DEBUG ((EFI_D_INFO, " Number of partition entries: %d\n", PrimaryHeader->NumberOfPartitionEntries));\r | |
240 | \r | |
241 | PEntryStatus = AllocateZeroPool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY_STATUS));\r | |
242 | if (PEntryStatus == NULL) {\r | |
243 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r | |
244 | goto Done;\r | |
245 | }\r | |
246 | \r | |
247 | //\r | |
248 | // Check the integrity of partition entries\r | |
249 | //\r | |
250 | PartitionCheckGptEntry (PrimaryHeader, PartEntry, PEntryStatus);\r | |
251 | \r | |
252 | //\r | |
253 | // If we got this far the GPT layout of the disk is valid and we should return true\r | |
254 | //\r | |
255 | GptValid = EFI_SUCCESS;\r | |
256 | \r | |
257 | //\r | |
258 | // Create child device handles\r | |
259 | //\r | |
260 | for (Index = 0; Index < PrimaryHeader->NumberOfPartitionEntries; Index++) {\r | |
261 | if (CompareGuid (&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeUnusedGuid) ||\r | |
262 | PEntryStatus[Index].OutOfRange ||\r | |
263 | PEntryStatus[Index].Overlap\r | |
264 | ) {\r | |
265 | //\r | |
266 | // Don't use null EFI Partition Entries or Invalid Partition Entries\r | |
267 | //\r | |
268 | continue;\r | |
269 | }\r | |
270 | \r | |
271 | ZeroMem (&HdDev, sizeof (HdDev));\r | |
272 | HdDev.Header.Type = MEDIA_DEVICE_PATH;\r | |
273 | HdDev.Header.SubType = MEDIA_HARDDRIVE_DP;\r | |
274 | SetDevicePathNodeLength (&HdDev.Header, sizeof (HdDev));\r | |
275 | \r | |
276 | HdDev.PartitionNumber = (UINT32) Index + 1;\r | |
277 | HdDev.MBRType = MBR_TYPE_EFI_PARTITION_TABLE_HEADER;\r | |
278 | HdDev.SignatureType = SIGNATURE_TYPE_GUID;\r | |
279 | HdDev.PartitionStart = PartEntry[Index].StartingLBA;\r | |
280 | HdDev.PartitionSize = PartEntry[Index].EndingLBA - PartEntry[Index].StartingLBA + 1;\r | |
281 | CopyMem (HdDev.Signature, &PartEntry[Index].UniquePartitionGUID, sizeof (EFI_GUID));\r | |
282 | \r | |
283 | DEBUG ((EFI_D_INFO, " Index : %d\n", Index));\r | |
284 | DEBUG ((EFI_D_INFO, " Start LBA : %x\n", HdDev.PartitionStart));\r | |
285 | DEBUG ((EFI_D_INFO, " End LBA : %x\n", PartEntry[Index].EndingLBA));\r | |
286 | DEBUG ((EFI_D_INFO, " Partition size: %x\n", HdDev.PartitionSize));\r | |
287 | DEBUG ((EFI_D_INFO, " Start : %x", MultU64x32 (PartEntry[Index].StartingLBA, BlockSize)));\r | |
288 | DEBUG ((EFI_D_INFO, " End : %x\n", MultU64x32 (PartEntry[Index].EndingLBA, BlockSize)));\r | |
289 | \r | |
290 | Status = PartitionInstallChildHandle (\r | |
291 | This,\r | |
292 | Handle,\r | |
293 | DiskIo,\r | |
294 | BlockIo,\r | |
295 | DevicePath,\r | |
296 | (EFI_DEVICE_PATH_PROTOCOL *) &HdDev,\r | |
297 | PartEntry[Index].StartingLBA,\r | |
298 | PartEntry[Index].EndingLBA,\r | |
299 | BlockSize,\r | |
300 | CompareGuid(&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeSystemPartGuid)\r | |
301 | );\r | |
302 | }\r | |
303 | \r | |
304 | DEBUG ((EFI_D_INFO, "Prepare to Free Pool\n"));\r | |
305 | \r | |
306 | Done:\r | |
307 | if (ProtectiveMbr != NULL) {\r | |
308 | FreePool (ProtectiveMbr);\r | |
309 | }\r | |
310 | if (PrimaryHeader != NULL) {\r | |
311 | FreePool (PrimaryHeader);\r | |
312 | }\r | |
313 | if (BackupHeader != NULL) {\r | |
314 | FreePool (BackupHeader);\r | |
315 | }\r | |
316 | if (PartEntry != NULL) {\r | |
317 | FreePool (PartEntry);\r | |
318 | }\r | |
319 | if (PEntryStatus != NULL) {\r | |
320 | FreePool (PEntryStatus);\r | |
321 | }\r | |
322 | \r | |
323 | return GptValid;\r | |
324 | }\r | |
325 | \r | |
b9575d60 A |
326 | \r |
327 | /**\r | |
328 | Install child handles if the Handle supports GPT partition structure.\r | |
329 | \r | |
330 | @param[in] BlockIo Parent BlockIo interface\r | |
331 | @param[in] DiskIo Disk Io protocol.\r | |
332 | @param[in] Lba The starting Lba of the Partition Table\r | |
333 | @param[in] PartHeader Stores the partition table that is read\r | |
334 | \r | |
335 | @retval TRUE The partition table is valid\r | |
336 | @retval FALSE The partition table is not valid\r | |
337 | \r | |
338 | **/\r | |
79840ee1 | 339 | BOOLEAN\r |
340 | PartitionValidGptTable (\r | |
341 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
342 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
343 | IN EFI_LBA Lba,\r | |
344 | OUT EFI_PARTITION_TABLE_HEADER *PartHeader\r | |
345 | )\r | |
79840ee1 | 346 | {\r |
347 | EFI_STATUS Status;\r | |
348 | UINT32 BlockSize;\r | |
349 | EFI_PARTITION_TABLE_HEADER *PartHdr;\r | |
350 | \r | |
351 | BlockSize = BlockIo->Media->BlockSize;\r | |
352 | \r | |
353 | PartHdr = AllocateZeroPool (BlockSize);\r | |
354 | \r | |
355 | if (PartHdr == NULL) {\r | |
356 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r | |
357 | return FALSE;\r | |
358 | }\r | |
359 | //\r | |
360 | // Read the EFI Partition Table Header\r | |
361 | //\r | |
362 | Status = BlockIo->ReadBlocks (\r | |
363 | BlockIo,\r | |
364 | BlockIo->Media->MediaId,\r | |
365 | Lba,\r | |
366 | BlockSize,\r | |
367 | PartHdr\r | |
368 | );\r | |
369 | if (EFI_ERROR (Status)) {\r | |
370 | FreePool (PartHdr);\r | |
371 | return FALSE;\r | |
372 | }\r | |
373 | \r | |
374 | if ((PartHdr->Header.Signature == EFI_PTAB_HEADER_ID) ||\r | |
375 | !PartitionCheckCrc (BlockSize, &PartHdr->Header) ||\r | |
376 | PartHdr->MyLBA != Lba\r | |
377 | ) {\r | |
378 | DEBUG ((EFI_D_INFO, " !Valid efi partition table header\n"));\r | |
379 | FreePool (PartHdr);\r | |
380 | return FALSE;\r | |
381 | }\r | |
382 | \r | |
383 | CopyMem (PartHeader, PartHdr, sizeof (EFI_PARTITION_TABLE_HEADER));\r | |
384 | if (!PartitionCheckGptEntryArrayCRC (BlockIo, DiskIo, PartHeader)) {\r | |
385 | FreePool (PartHdr);\r | |
386 | return FALSE;\r | |
387 | }\r | |
388 | \r | |
389 | DEBUG ((EFI_D_INFO, " Valid efi partition table header\n"));\r | |
390 | FreePool (PartHdr);\r | |
391 | return TRUE;\r | |
392 | }\r | |
393 | \r | |
b9575d60 A |
394 | \r |
395 | /**\r | |
396 | Check if the CRC field in the Partition table header is valid\r | |
397 | for Partition entry array.\r | |
398 | \r | |
399 | @param[in] BlockIo Parent BlockIo interface\r | |
400 | @param[in] DiskIo Disk Io Protocol.\r | |
401 | @param[in] PartHeader Partition table header structure\r | |
402 | \r | |
403 | @retval TRUE the CRC is valid\r | |
404 | @retval FALSE the CRC is invalid\r | |
405 | \r | |
406 | **/\r | |
79840ee1 | 407 | BOOLEAN\r |
408 | PartitionCheckGptEntryArrayCRC (\r | |
409 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
410 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
411 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r | |
412 | )\r | |
79840ee1 | 413 | {\r |
414 | EFI_STATUS Status;\r | |
415 | UINT8 *Ptr;\r | |
416 | UINT32 Crc;\r | |
417 | UINTN Size;\r | |
418 | \r | |
419 | //\r | |
420 | // Read the EFI Partition Entries\r | |
421 | //\r | |
422 | Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);\r | |
423 | if (Ptr == NULL) {\r | |
424 | DEBUG ((EFI_D_ERROR, " Allocate pool error\n"));\r | |
425 | return FALSE;\r | |
426 | }\r | |
427 | \r | |
428 | Status = DiskIo->ReadDisk (\r | |
429 | DiskIo,\r | |
430 | BlockIo->Media->MediaId,\r | |
431 | MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),\r | |
432 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r | |
433 | Ptr\r | |
434 | );\r | |
435 | if (EFI_ERROR (Status)) {\r | |
436 | FreePool (Ptr);\r | |
437 | return FALSE;\r | |
438 | }\r | |
439 | \r | |
440 | Size = PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry;\r | |
441 | \r | |
442 | Status = gBS->CalculateCrc32 (Ptr, Size, &Crc);\r | |
443 | if (EFI_ERROR (Status)) {\r | |
444 | DEBUG ((EFI_D_ERROR, "CheckPEntryArrayCRC: Crc calculation failed\n"));\r | |
445 | FreePool (Ptr);\r | |
446 | return FALSE;\r | |
447 | }\r | |
448 | \r | |
449 | FreePool (Ptr);\r | |
450 | \r | |
451 | return (BOOLEAN) (PartHeader->PartitionEntryArrayCRC32 == Crc);\r | |
452 | }\r | |
453 | \r | |
79840ee1 | 454 | \r |
b9575d60 | 455 | /**\r |
79840ee1 | 456 | Restore Partition Table to its alternate place\r |
457 | (Primary -> Backup or Backup -> Primary)\r | |
458 | \r | |
b9575d60 A |
459 | @param[in] BlockIo Parent BlockIo interface\r |
460 | @param[in] DiskIo Disk Io Protocol.\r | |
461 | @param[in] PartHeader Partition table header structure\r | |
79840ee1 | 462 | \r |
b9575d60 A |
463 | @retval TRUE Restoring succeeds\r |
464 | @retval FALSE Restoring failed\r | |
79840ee1 | 465 | \r |
b9575d60 A |
466 | **/\r |
467 | BOOLEAN\r | |
468 | PartitionRestoreGptTable (\r | |
469 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
470 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
471 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r | |
472 | )\r | |
79840ee1 | 473 | {\r |
474 | EFI_STATUS Status;\r | |
475 | UINTN BlockSize;\r | |
476 | EFI_PARTITION_TABLE_HEADER *PartHdr;\r | |
477 | EFI_LBA PEntryLBA;\r | |
478 | UINT8 *Ptr;\r | |
479 | \r | |
480 | PartHdr = NULL;\r | |
481 | Ptr = NULL;\r | |
482 | \r | |
483 | BlockSize = BlockIo->Media->BlockSize;\r | |
484 | \r | |
485 | PartHdr = AllocateZeroPool (BlockSize);\r | |
486 | \r | |
487 | if (PartHdr == NULL) {\r | |
488 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r | |
489 | return FALSE;\r | |
490 | }\r | |
491 | \r | |
492 | PEntryLBA = (PartHeader->MyLBA == PRIMARY_PART_HEADER_LBA) ? \\r | |
493 | (PartHeader->LastUsableLBA + 1) : \\r | |
494 | (PRIMARY_PART_HEADER_LBA + 1);\r | |
495 | \r | |
496 | CopyMem (PartHdr, PartHeader, sizeof (EFI_PARTITION_TABLE_HEADER));\r | |
497 | \r | |
498 | PartHdr->MyLBA = PartHeader->AlternateLBA;\r | |
499 | PartHdr->AlternateLBA = PartHeader->MyLBA;\r | |
500 | PartHdr->PartitionEntryLBA = PEntryLBA;\r | |
501 | PartitionSetCrc ((EFI_TABLE_HEADER *) PartHdr);\r | |
502 | \r | |
503 | Status = BlockIo->WriteBlocks (BlockIo, BlockIo->Media->MediaId, PartHdr->MyLBA, BlockSize, PartHdr);\r | |
504 | if (EFI_ERROR (Status)) {\r | |
505 | goto Done;\r | |
506 | }\r | |
507 | \r | |
508 | Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);\r | |
509 | if (Ptr == NULL) {\r | |
510 | DEBUG ((EFI_D_ERROR, " Allocate pool effor\n"));\r | |
511 | Status = EFI_OUT_OF_RESOURCES;\r | |
512 | goto Done;\r | |
513 | }\r | |
514 | \r | |
515 | Status = DiskIo->ReadDisk (\r | |
516 | DiskIo,\r | |
517 | BlockIo->Media->MediaId,\r | |
518 | MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),\r | |
519 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r | |
520 | Ptr\r | |
521 | );\r | |
522 | if (EFI_ERROR (Status)) {\r | |
523 | goto Done;\r | |
524 | }\r | |
525 | \r | |
526 | Status = DiskIo->WriteDisk (\r | |
527 | DiskIo,\r | |
528 | BlockIo->Media->MediaId,\r | |
529 | MultU64x32(PEntryLBA, BlockIo->Media->BlockSize),\r | |
530 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r | |
531 | Ptr\r | |
532 | );\r | |
533 | \r | |
534 | Done:\r | |
535 | FreePool (PartHdr);\r | |
536 | FreePool (Ptr);\r | |
537 | \r | |
538 | if (EFI_ERROR (Status)) {\r | |
539 | return FALSE;\r | |
540 | }\r | |
541 | \r | |
542 | return TRUE;\r | |
543 | }\r | |
544 | \r | |
b9575d60 A |
545 | \r |
546 | /**\r | |
547 | Restore Partition Table to its alternate place\r | |
548 | (Primary -> Backup or Backup -> Primary)\r | |
549 | \r | |
550 | @param[in] PartHeader Partition table header structure\r | |
551 | @param[in] PartEntry The partition entry array\r | |
552 | @param[out] PEntryStatus the partition entry status array \r | |
553 | recording the status of each partition\r | |
554 | **/\r | |
79840ee1 | 555 | VOID\r |
556 | PartitionCheckGptEntry (\r | |
557 | IN EFI_PARTITION_TABLE_HEADER *PartHeader,\r | |
558 | IN EFI_PARTITION_ENTRY *PartEntry,\r | |
559 | OUT EFI_PARTITION_ENTRY_STATUS *PEntryStatus\r | |
560 | )\r | |
79840ee1 | 561 | {\r |
562 | EFI_LBA StartingLBA;\r | |
563 | EFI_LBA EndingLBA;\r | |
564 | UINTN Index1;\r | |
565 | UINTN Index2;\r | |
566 | \r | |
567 | DEBUG ((EFI_D_INFO, " start check partition entries\n"));\r | |
568 | for (Index1 = 0; Index1 < PartHeader->NumberOfPartitionEntries; Index1++) {\r | |
569 | if (CompareGuid (&PartEntry[Index1].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {\r | |
570 | continue;\r | |
571 | }\r | |
572 | \r | |
573 | StartingLBA = PartEntry[Index1].StartingLBA;\r | |
574 | EndingLBA = PartEntry[Index1].EndingLBA;\r | |
575 | if (StartingLBA > EndingLBA ||\r | |
576 | StartingLBA < PartHeader->FirstUsableLBA ||\r | |
577 | StartingLBA > PartHeader->LastUsableLBA ||\r | |
578 | EndingLBA < PartHeader->FirstUsableLBA ||\r | |
579 | EndingLBA > PartHeader->LastUsableLBA\r | |
580 | ) {\r | |
581 | PEntryStatus[Index1].OutOfRange = TRUE;\r | |
582 | continue;\r | |
583 | }\r | |
584 | \r | |
585 | for (Index2 = Index1 + 1; Index2 < PartHeader->NumberOfPartitionEntries; Index2++) {\r | |
586 | \r | |
587 | if (CompareGuid (&PartEntry[Index2].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {\r | |
588 | continue;\r | |
589 | }\r | |
590 | \r | |
591 | if (PartEntry[Index2].EndingLBA >= StartingLBA && PartEntry[Index2].StartingLBA <= EndingLBA) {\r | |
592 | //\r | |
593 | // This region overlaps with the Index1'th region\r | |
594 | //\r | |
595 | PEntryStatus[Index1].Overlap = TRUE;\r | |
596 | PEntryStatus[Index2].Overlap = TRUE;\r | |
597 | continue;\r | |
598 | \r | |
599 | }\r | |
600 | }\r | |
601 | }\r | |
602 | \r | |
603 | DEBUG ((EFI_D_INFO, " End check partition entries\n"));\r | |
604 | }\r | |
605 | \r | |
b9575d60 A |
606 | \r |
607 | /**\r | |
608 | Updates the CRC32 value in the table header\r | |
609 | \r | |
610 | @param[in,out] Hdr Table to update\r | |
611 | \r | |
612 | **/\r | |
79840ee1 | 613 | VOID\r |
614 | PartitionSetCrc (\r | |
615 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
616 | )\r | |
b9575d60 A |
617 | {\r |
618 | PartitionSetCrcAltSize (Hdr->HeaderSize, Hdr);\r | |
619 | }\r | |
79840ee1 | 620 | \r |
79840ee1 | 621 | \r |
b9575d60 | 622 | /**\r |
79840ee1 | 623 | Updates the CRC32 value in the table header\r |
624 | \r | |
b9575d60 A |
625 | @param[in] Size The size of the table\r |
626 | @param[in,out] Hdr Table to update\r | |
79840ee1 | 627 | \r |
b9575d60 | 628 | **/\r |
79840ee1 | 629 | VOID\r |
630 | PartitionSetCrcAltSize (\r | |
631 | IN UINTN Size,\r | |
632 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
633 | )\r | |
79840ee1 | 634 | \r |
79840ee1 | 635 | {\r |
636 | UINT32 Crc;\r | |
637 | \r | |
638 | Hdr->CRC32 = 0;\r | |
639 | gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);\r | |
640 | Hdr->CRC32 = Crc;\r | |
641 | }\r | |
642 | \r | |
b9575d60 A |
643 | \r |
644 | /**\r | |
645 | Checks the CRC32 value in the table header\r | |
646 | \r | |
647 | @param[in] MaxSize Max Size limit\r | |
648 | @param[in,out] Hdr Table to check\r | |
649 | \r | |
650 | @return TRUE CRC Valid\r | |
651 | @return FALSE CRC Invalid\r | |
652 | \r | |
653 | **/\r | |
79840ee1 | 654 | BOOLEAN\r |
655 | PartitionCheckCrc (\r | |
656 | IN UINTN MaxSize,\r | |
657 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
658 | )\r | |
b9575d60 A |
659 | {\r |
660 | return PartitionCheckCrcAltSize (MaxSize, Hdr->HeaderSize, Hdr);\r | |
661 | }\r | |
79840ee1 | 662 | \r |
79840ee1 | 663 | \r |
b9575d60 | 664 | /**\r |
79840ee1 | 665 | Checks the CRC32 value in the table header\r |
666 | \r | |
b9575d60 A |
667 | @param[in] MaxSize Max Size limit\r |
668 | @param[in] Size The size of the table\r | |
669 | @param[in,out] Hdr Table to check\r | |
79840ee1 | 670 | \r |
b9575d60 A |
671 | @return TRUE CRC Valid\r |
672 | @return FALSE CRC Invalid\r | |
79840ee1 | 673 | \r |
b9575d60 | 674 | **/\r |
79840ee1 | 675 | BOOLEAN\r |
676 | PartitionCheckCrcAltSize (\r | |
677 | IN UINTN MaxSize,\r | |
678 | IN UINTN Size,\r | |
679 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
680 | )\r | |
79840ee1 | 681 | {\r |
682 | UINT32 Crc;\r | |
683 | UINT32 OrgCrc;\r | |
684 | EFI_STATUS Status;\r | |
685 | \r | |
686 | Crc = 0;\r | |
687 | \r | |
688 | if (Size == 0) {\r | |
689 | //\r | |
690 | // If header size is 0 CRC will pass so return FALSE here\r | |
691 | //\r | |
692 | return FALSE;\r | |
693 | }\r | |
694 | \r | |
695 | if (MaxSize && Size > MaxSize) {\r | |
696 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Size > MaxSize\n"));\r | |
697 | return FALSE;\r | |
698 | }\r | |
699 | //\r | |
700 | // clear old crc from header\r | |
701 | //\r | |
702 | OrgCrc = Hdr->CRC32;\r | |
703 | Hdr->CRC32 = 0;\r | |
704 | \r | |
705 | Status = gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);\r | |
706 | if (EFI_ERROR (Status)) {\r | |
707 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc calculation failed\n"));\r | |
708 | return FALSE;\r | |
709 | }\r | |
710 | //\r | |
711 | // set results\r | |
712 | //\r | |
713 | Hdr->CRC32 = Crc;\r | |
714 | \r | |
715 | //\r | |
716 | // return status\r | |
717 | //\r | |
718 | DEBUG_CODE_BEGIN ();\r | |
719 | if (OrgCrc != Crc) {\r | |
720 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc check failed\n"));\r | |
721 | }\r | |
722 | DEBUG_CODE_END ();\r | |
723 | \r | |
724 | return (BOOLEAN) (OrgCrc == Crc);\r | |
725 | }\r |