| adbcbf8f |
1 | /** @file\r |
| 8a7d75b0 |
2 | Decode a hard disk partitioned with the GPT scheme in the UEFI 2.0\r |
| adbcbf8f |
3 | specification.\r |
| 4 | \r |
| f42be642 |
5 | Copyright (c) 2006 - 2008, Intel Corporation. <BR>\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 |
| adbcbf8f |
13 | \r |
| 14 | **/\r |
| 15 | \r |
| 16 | \r |
| 17 | #include "Partition.h"\r |
| 18 | \r |
| 19 | \r |
| a8d0c20e |
20 | /**\r |
| 21 | Install child handles if the Handle supports GPT partition structure.\r |
| 22 | \r |
| 23 | @param[in] BlockIo Parent BlockIo interface\r |
| 24 | @param[in] DiskIo Disk Io protocol.\r |
| 25 | @param[in] Lba The starting Lba of the Partition Table\r |
| 26 | @param[out] PartHeader Stores the partition table that is read\r |
| 27 | \r |
| 28 | @retval TRUE The partition table is valid\r |
| 29 | @retval FALSE The partition table is not valid\r |
| 30 | \r |
| 31 | **/\r |
| adbcbf8f |
32 | BOOLEAN\r |
| 33 | PartitionValidGptTable (\r |
| 34 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 35 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 36 | IN EFI_LBA Lba,\r |
| 37 | OUT EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 38 | );\r |
| 39 | \r |
| 40 | \r |
| a8d0c20e |
41 | /**\r |
| 42 | Check if the CRC field in the Partition table header is valid\r |
| 43 | for Partition entry array.\r |
| 44 | \r |
| 45 | @param[in] BlockIo Parent BlockIo interface\r |
| 46 | @param[in] DiskIo Disk Io Protocol.\r |
| 47 | @param[in] PartHeader Partition table header structure\r |
| 48 | \r |
| 49 | @retval TRUE the CRC is valid\r |
| 50 | @retval FALSE the CRC is invalid\r |
| 51 | \r |
| 52 | **/\r |
| adbcbf8f |
53 | BOOLEAN\r |
| 54 | PartitionCheckGptEntryArrayCRC (\r |
| 55 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 56 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 57 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 58 | );\r |
| 59 | \r |
| 60 | \r |
| a8d0c20e |
61 | /**\r |
| 62 | Restore Partition Table to its alternate place\r |
| 63 | (Primary -> Backup or Backup -> Primary)\r |
| 64 | \r |
| 65 | @param[in] BlockIo Parent BlockIo interface\r |
| 66 | @param[in] DiskIo Disk Io Protocol.\r |
| 67 | @param[in] PartHeader Partition table header structure\r |
| 68 | \r |
| 69 | @retval TRUE Restoring succeeds\r |
| 70 | @retval FALSE Restoring failed\r |
| 71 | \r |
| 72 | **/\r |
| adbcbf8f |
73 | BOOLEAN\r |
| 74 | PartitionRestoreGptTable (\r |
| 75 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 76 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 77 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 78 | );\r |
| 79 | \r |
| 80 | \r |
| a8d0c20e |
81 | /**\r |
| ea7cb08c |
82 | Restore Partition Table to its alternate place.\r |
| a8d0c20e |
83 | (Primary -> Backup or Backup -> Primary)\r |
| 84 | \r |
| 85 | @param[in] PartHeader Partition table header structure\r |
| 86 | @param[in] PartEntry The partition entry array\r |
| 87 | @param[out] PEntryStatus the partition entry status array \r |
| 88 | recording the status of each partition\r |
| 89 | \r |
| 90 | **/\r |
| adbcbf8f |
91 | VOID\r |
| 92 | PartitionCheckGptEntry (\r |
| 93 | IN EFI_PARTITION_TABLE_HEADER *PartHeader,\r |
| 94 | IN EFI_PARTITION_ENTRY *PartEntry,\r |
| 95 | OUT EFI_PARTITION_ENTRY_STATUS *PEntryStatus\r |
| 96 | );\r |
| 97 | \r |
| 98 | \r |
| a8d0c20e |
99 | /**\r |
| ea7cb08c |
100 | Checks the CRC32 value in the table header.\r |
| a8d0c20e |
101 | \r |
| 102 | @param MaxSize Max Size limit\r |
| 103 | @param Size The size of the table\r |
| 104 | @param Hdr Table to check\r |
| 105 | \r |
| 106 | @return TRUE CRC Valid\r |
| 107 | @return FALSE CRC Invalid\r |
| 108 | \r |
| 109 | **/\r |
| adbcbf8f |
110 | BOOLEAN\r |
| 111 | PartitionCheckCrcAltSize (\r |
| 112 | IN UINTN MaxSize,\r |
| 113 | IN UINTN Size,\r |
| 114 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 115 | );\r |
| 116 | \r |
| 117 | \r |
| a8d0c20e |
118 | /**\r |
| ea7cb08c |
119 | Checks the CRC32 value in the table header.\r |
| a8d0c20e |
120 | \r |
| 121 | @param MaxSize Max Size limit\r |
| 122 | @param Hdr Table to check\r |
| 123 | \r |
| 124 | @return TRUE CRC Valid\r |
| 125 | @return FALSE CRC Invalid\r |
| 126 | \r |
| 127 | **/\r |
| adbcbf8f |
128 | BOOLEAN\r |
| 129 | PartitionCheckCrc (\r |
| 130 | IN UINTN MaxSize,\r |
| 131 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 132 | );\r |
| 133 | \r |
| 134 | \r |
| a8d0c20e |
135 | /**\r |
| ea7cb08c |
136 | Updates the CRC32 value in the table header.\r |
| a8d0c20e |
137 | \r |
| 138 | @param Size The size of the table\r |
| 139 | @param Hdr Table to update\r |
| 140 | \r |
| 141 | **/\r |
| adbcbf8f |
142 | VOID\r |
| 143 | PartitionSetCrcAltSize (\r |
| 144 | IN UINTN Size,\r |
| 145 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 146 | );\r |
| 147 | \r |
| 148 | \r |
| a8d0c20e |
149 | /**\r |
| ea7cb08c |
150 | Updates the CRC32 value in the table header.\r |
| a8d0c20e |
151 | \r |
| 152 | @param Hdr Table to update\r |
| 153 | \r |
| 154 | **/\r |
| adbcbf8f |
155 | VOID\r |
| 156 | PartitionSetCrc (\r |
| 157 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 158 | );\r |
| 159 | \r |
| 160 | /**\r |
| 161 | Install child handles if the Handle supports GPT partition structure.\r |
| 162 | \r |
| 163 | @param[in] This - Calling context.\r |
| 164 | @param[in] Handle - Parent Handle\r |
| 165 | @param[in] DiskIo - Parent DiskIo interface\r |
| 166 | @param[in] BlockIo - Parent BlockIo interface\r |
| 167 | @param[in] DevicePath - Parent Device Path\r |
| 168 | \r |
| 169 | @retval EFI_SUCCESS Valid GPT disk\r |
| 170 | @retval EFI_MEDIA_CHANGED Media changed Detected\r |
| 171 | @retval other Not a valid GPT disk\r |
| 172 | \r |
| 173 | **/\r |
| 174 | EFI_STATUS\r |
| 175 | PartitionInstallGptChildHandles (\r |
| 176 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r |
| 177 | IN EFI_HANDLE Handle,\r |
| 178 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 179 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 180 | IN EFI_DEVICE_PATH_PROTOCOL *DevicePath\r |
| 181 | )\r |
| 182 | {\r |
| 183 | EFI_STATUS Status;\r |
| 184 | UINT32 BlockSize;\r |
| 185 | EFI_LBA LastBlock;\r |
| 186 | MASTER_BOOT_RECORD *ProtectiveMbr;\r |
| 187 | EFI_PARTITION_TABLE_HEADER *PrimaryHeader;\r |
| 188 | EFI_PARTITION_TABLE_HEADER *BackupHeader;\r |
| 189 | EFI_PARTITION_ENTRY *PartEntry;\r |
| 190 | EFI_PARTITION_ENTRY_STATUS *PEntryStatus;\r |
| 191 | UINTN Index;\r |
| 192 | EFI_STATUS GptValid;\r |
| 193 | HARDDRIVE_DEVICE_PATH HdDev;\r |
| 194 | \r |
| 195 | ProtectiveMbr = NULL;\r |
| 196 | PrimaryHeader = NULL;\r |
| 197 | BackupHeader = NULL;\r |
| 198 | PartEntry = NULL;\r |
| 199 | PEntryStatus = NULL;\r |
| 200 | \r |
| 201 | BlockSize = BlockIo->Media->BlockSize;\r |
| 202 | LastBlock = BlockIo->Media->LastBlock;\r |
| 203 | \r |
| 204 | DEBUG ((EFI_D_INFO, " BlockSize : %d \n", BlockSize));\r |
| 205 | DEBUG ((EFI_D_INFO, " LastBlock : %x \n", LastBlock));\r |
| 206 | \r |
| 207 | GptValid = EFI_NOT_FOUND;\r |
| 208 | \r |
| 209 | //\r |
| 210 | // Allocate a buffer for the Protective MBR\r |
| 211 | //\r |
| 212 | ProtectiveMbr = AllocatePool (BlockSize);\r |
| 213 | if (ProtectiveMbr == NULL) {\r |
| 214 | return EFI_NOT_FOUND;\r |
| 215 | }\r |
| 216 | \r |
| 217 | //\r |
| 218 | // Read the Protective MBR from LBA #0\r |
| 219 | //\r |
| 220 | Status = BlockIo->ReadBlocks (\r |
| 221 | BlockIo,\r |
| 222 | BlockIo->Media->MediaId,\r |
| 223 | 0,\r |
| 224 | BlockIo->Media->BlockSize,\r |
| 225 | ProtectiveMbr\r |
| 226 | );\r |
| 227 | if (EFI_ERROR (Status)) {\r |
| 228 | GptValid = Status;\r |
| 229 | goto Done;\r |
| 230 | }\r |
| 231 | //\r |
| 232 | // Verify that the Protective MBR is valid\r |
| 233 | //\r |
| 234 | if (ProtectiveMbr->Partition[0].BootIndicator != 0x00 ||\r |
| 235 | ProtectiveMbr->Partition[0].OSIndicator != PMBR_GPT_PARTITION ||\r |
| 236 | UNPACK_UINT32 (ProtectiveMbr->Partition[0].StartingLBA) != 1\r |
| 237 | ) {\r |
| 238 | goto Done;\r |
| 239 | }\r |
| 240 | \r |
| 241 | //\r |
| 242 | // Allocate the GPT structures\r |
| 243 | //\r |
| 244 | PrimaryHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));\r |
| 245 | if (PrimaryHeader == NULL) {\r |
| 246 | goto Done;\r |
| 247 | }\r |
| 248 | \r |
| 249 | BackupHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));\r |
| 250 | \r |
| 251 | if (BackupHeader == NULL) {\r |
| 252 | goto Done;\r |
| 253 | }\r |
| 254 | \r |
| 255 | //\r |
| 256 | // Check primary and backup partition tables\r |
| 257 | //\r |
| 258 | if (!PartitionValidGptTable (BlockIo, DiskIo, PRIMARY_PART_HEADER_LBA, PrimaryHeader)) {\r |
| 259 | DEBUG ((EFI_D_INFO, " Not Valid primary partition table\n"));\r |
| 260 | \r |
| 261 | if (!PartitionValidGptTable (BlockIo, DiskIo, LastBlock, BackupHeader)) {\r |
| 262 | DEBUG ((EFI_D_INFO, " Not Valid backup partition table\n"));\r |
| 263 | goto Done;\r |
| 264 | } else {\r |
| 265 | DEBUG ((EFI_D_INFO, " Valid backup partition table\n"));\r |
| 266 | DEBUG ((EFI_D_INFO, " Restore primary partition table by the backup\n"));\r |
| 267 | if (!PartitionRestoreGptTable (BlockIo, DiskIo, BackupHeader)) {\r |
| 268 | DEBUG ((EFI_D_INFO, " Restore primary partition table error\n"));\r |
| 269 | }\r |
| 270 | \r |
| 271 | if (PartitionValidGptTable (BlockIo, DiskIo, BackupHeader->AlternateLBA, PrimaryHeader)) {\r |
| 272 | DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));\r |
| 273 | }\r |
| 274 | }\r |
| 275 | } else if (!PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {\r |
| 276 | DEBUG ((EFI_D_INFO, " Valid primary and !Valid backup partition table\n"));\r |
| 277 | DEBUG ((EFI_D_INFO, " Restore backup partition table by the primary\n"));\r |
| 278 | if (!PartitionRestoreGptTable (BlockIo, DiskIo, PrimaryHeader)) {\r |
| 279 | DEBUG ((EFI_D_INFO, " Restore backup partition table error\n"));\r |
| 280 | }\r |
| 281 | \r |
| 282 | if (PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {\r |
| 283 | DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));\r |
| 284 | }\r |
| 285 | \r |
| 286 | }\r |
| 287 | \r |
| 288 | DEBUG ((EFI_D_INFO, " Valid primary and Valid backup partition table\n"));\r |
| 289 | \r |
| 290 | //\r |
| 291 | // Read the EFI Partition Entries\r |
| 292 | //\r |
| 293 | PartEntry = AllocatePool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY));\r |
| 294 | if (PartEntry == NULL) {\r |
| 295 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r |
| 296 | goto Done;\r |
| 297 | }\r |
| 298 | \r |
| 299 | Status = DiskIo->ReadDisk (\r |
| 300 | DiskIo,\r |
| 301 | BlockIo->Media->MediaId,\r |
| 302 | MultU64x32(PrimaryHeader->PartitionEntryLBA, BlockSize),\r |
| 303 | PrimaryHeader->NumberOfPartitionEntries * (PrimaryHeader->SizeOfPartitionEntry),\r |
| 304 | PartEntry\r |
| 305 | );\r |
| 306 | if (EFI_ERROR (Status)) {\r |
| 307 | GptValid = Status;\r |
| 308 | DEBUG ((EFI_D_INFO, " Partition Entry ReadBlocks error\n"));\r |
| 309 | goto Done;\r |
| 310 | }\r |
| 311 | \r |
| 312 | DEBUG ((EFI_D_INFO, " Partition entries read block success\n"));\r |
| 313 | \r |
| 314 | DEBUG ((EFI_D_INFO, " Number of partition entries: %d\n", PrimaryHeader->NumberOfPartitionEntries));\r |
| 315 | \r |
| 316 | PEntryStatus = AllocateZeroPool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY_STATUS));\r |
| 317 | if (PEntryStatus == NULL) {\r |
| 318 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r |
| 319 | goto Done;\r |
| 320 | }\r |
| 321 | \r |
| 322 | //\r |
| 323 | // Check the integrity of partition entries\r |
| 324 | //\r |
| 325 | PartitionCheckGptEntry (PrimaryHeader, PartEntry, PEntryStatus);\r |
| 326 | \r |
| 327 | //\r |
| 328 | // If we got this far the GPT layout of the disk is valid and we should return true\r |
| 329 | //\r |
| 330 | GptValid = EFI_SUCCESS;\r |
| 331 | \r |
| 332 | //\r |
| 333 | // Create child device handles\r |
| 334 | //\r |
| 335 | for (Index = 0; Index < PrimaryHeader->NumberOfPartitionEntries; Index++) {\r |
| 336 | if (CompareGuid (&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeUnusedGuid) ||\r |
| 337 | PEntryStatus[Index].OutOfRange ||\r |
| 338 | PEntryStatus[Index].Overlap\r |
| 339 | ) {\r |
| 340 | //\r |
| 341 | // Don't use null EFI Partition Entries or Invalid Partition Entries\r |
| 342 | //\r |
| 343 | continue;\r |
| 344 | }\r |
| 345 | \r |
| 346 | ZeroMem (&HdDev, sizeof (HdDev));\r |
| 347 | HdDev.Header.Type = MEDIA_DEVICE_PATH;\r |
| 348 | HdDev.Header.SubType = MEDIA_HARDDRIVE_DP;\r |
| 349 | SetDevicePathNodeLength (&HdDev.Header, sizeof (HdDev));\r |
| 350 | \r |
| 351 | HdDev.PartitionNumber = (UINT32) Index + 1;\r |
| 352 | HdDev.MBRType = MBR_TYPE_EFI_PARTITION_TABLE_HEADER;\r |
| 353 | HdDev.SignatureType = SIGNATURE_TYPE_GUID;\r |
| 354 | HdDev.PartitionStart = PartEntry[Index].StartingLBA;\r |
| 355 | HdDev.PartitionSize = PartEntry[Index].EndingLBA - PartEntry[Index].StartingLBA + 1;\r |
| 356 | CopyMem (HdDev.Signature, &PartEntry[Index].UniquePartitionGUID, sizeof (EFI_GUID));\r |
| 357 | \r |
| 358 | DEBUG ((EFI_D_INFO, " Index : %d\n", Index));\r |
| 359 | DEBUG ((EFI_D_INFO, " Start LBA : %x\n", HdDev.PartitionStart));\r |
| 360 | DEBUG ((EFI_D_INFO, " End LBA : %x\n", PartEntry[Index].EndingLBA));\r |
| 361 | DEBUG ((EFI_D_INFO, " Partition size: %x\n", HdDev.PartitionSize));\r |
| 362 | DEBUG ((EFI_D_INFO, " Start : %x", MultU64x32 (PartEntry[Index].StartingLBA, BlockSize)));\r |
| 363 | DEBUG ((EFI_D_INFO, " End : %x\n", MultU64x32 (PartEntry[Index].EndingLBA, BlockSize)));\r |
| 364 | \r |
| 365 | Status = PartitionInstallChildHandle (\r |
| 366 | This,\r |
| 367 | Handle,\r |
| 368 | DiskIo,\r |
| 369 | BlockIo,\r |
| 370 | DevicePath,\r |
| 371 | (EFI_DEVICE_PATH_PROTOCOL *) &HdDev,\r |
| 372 | PartEntry[Index].StartingLBA,\r |
| 373 | PartEntry[Index].EndingLBA,\r |
| 374 | BlockSize,\r |
| 375 | CompareGuid(&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeSystemPartGuid)\r |
| 376 | );\r |
| 377 | }\r |
| 378 | \r |
| 379 | DEBUG ((EFI_D_INFO, "Prepare to Free Pool\n"));\r |
| 380 | \r |
| 381 | Done:\r |
| 382 | if (ProtectiveMbr != NULL) {\r |
| 383 | FreePool (ProtectiveMbr);\r |
| 384 | }\r |
| 385 | if (PrimaryHeader != NULL) {\r |
| 386 | FreePool (PrimaryHeader);\r |
| 387 | }\r |
| 388 | if (BackupHeader != NULL) {\r |
| 389 | FreePool (BackupHeader);\r |
| 390 | }\r |
| 391 | if (PartEntry != NULL) {\r |
| 392 | FreePool (PartEntry);\r |
| 393 | }\r |
| 394 | if (PEntryStatus != NULL) {\r |
| 395 | FreePool (PEntryStatus);\r |
| 396 | }\r |
| 397 | \r |
| 398 | return GptValid;\r |
| 399 | }\r |
| 400 | \r |
| 401 | \r |
| 402 | /**\r |
| 403 | Install child handles if the Handle supports GPT partition structure.\r |
| 404 | \r |
| 405 | @param[in] BlockIo Parent BlockIo interface\r |
| 406 | @param[in] DiskIo Disk Io protocol.\r |
| 407 | @param[in] Lba The starting Lba of the Partition Table\r |
| a8d0c20e |
408 | @param[out] PartHeader Stores the partition table that is read\r |
| adbcbf8f |
409 | \r |
| 410 | @retval TRUE The partition table is valid\r |
| 411 | @retval FALSE The partition table is not valid\r |
| 412 | \r |
| 413 | **/\r |
| 414 | BOOLEAN\r |
| 415 | PartitionValidGptTable (\r |
| 416 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 417 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 418 | IN EFI_LBA Lba,\r |
| 419 | OUT EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 420 | )\r |
| 421 | {\r |
| 422 | EFI_STATUS Status;\r |
| 423 | UINT32 BlockSize;\r |
| 424 | EFI_PARTITION_TABLE_HEADER *PartHdr;\r |
| 425 | \r |
| 426 | BlockSize = BlockIo->Media->BlockSize;\r |
| 427 | \r |
| 428 | PartHdr = AllocateZeroPool (BlockSize);\r |
| 429 | \r |
| 430 | if (PartHdr == NULL) {\r |
| 431 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r |
| 432 | return FALSE;\r |
| 433 | }\r |
| 434 | //\r |
| 435 | // Read the EFI Partition Table Header\r |
| 436 | //\r |
| 437 | Status = BlockIo->ReadBlocks (\r |
| 438 | BlockIo,\r |
| 439 | BlockIo->Media->MediaId,\r |
| 440 | Lba,\r |
| 441 | BlockSize,\r |
| 442 | PartHdr\r |
| 443 | );\r |
| 444 | if (EFI_ERROR (Status)) {\r |
| 445 | FreePool (PartHdr);\r |
| 446 | return FALSE;\r |
| 447 | }\r |
| 448 | \r |
| cd2d8468 |
449 | if ((PartHdr->Header.Signature != EFI_PTAB_HEADER_ID) ||\r |
| adbcbf8f |
450 | !PartitionCheckCrc (BlockSize, &PartHdr->Header) ||\r |
| 451 | PartHdr->MyLBA != Lba\r |
| 452 | ) {\r |
| 453 | DEBUG ((EFI_D_INFO, " !Valid efi partition table header\n"));\r |
| 454 | FreePool (PartHdr);\r |
| 455 | return FALSE;\r |
| 456 | }\r |
| 457 | \r |
| 458 | CopyMem (PartHeader, PartHdr, sizeof (EFI_PARTITION_TABLE_HEADER));\r |
| 459 | if (!PartitionCheckGptEntryArrayCRC (BlockIo, DiskIo, PartHeader)) {\r |
| 460 | FreePool (PartHdr);\r |
| 461 | return FALSE;\r |
| 462 | }\r |
| 463 | \r |
| 464 | DEBUG ((EFI_D_INFO, " Valid efi partition table header\n"));\r |
| 465 | FreePool (PartHdr);\r |
| 466 | return TRUE;\r |
| 467 | }\r |
| 468 | \r |
| 469 | \r |
| 470 | /**\r |
| 471 | Check if the CRC field in the Partition table header is valid\r |
| 472 | for Partition entry array.\r |
| 473 | \r |
| 474 | @param[in] BlockIo Parent BlockIo interface\r |
| 475 | @param[in] DiskIo Disk Io Protocol.\r |
| 476 | @param[in] PartHeader Partition table header structure\r |
| 477 | \r |
| 478 | @retval TRUE the CRC is valid\r |
| 479 | @retval FALSE the CRC is invalid\r |
| 480 | \r |
| 481 | **/\r |
| 482 | BOOLEAN\r |
| 483 | PartitionCheckGptEntryArrayCRC (\r |
| 484 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 485 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 486 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 487 | )\r |
| 488 | {\r |
| 489 | EFI_STATUS Status;\r |
| 490 | UINT8 *Ptr;\r |
| 491 | UINT32 Crc;\r |
| 492 | UINTN Size;\r |
| 493 | \r |
| 494 | //\r |
| 495 | // Read the EFI Partition Entries\r |
| 496 | //\r |
| 497 | Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);\r |
| 498 | if (Ptr == NULL) {\r |
| 499 | DEBUG ((EFI_D_ERROR, " Allocate pool error\n"));\r |
| 500 | return FALSE;\r |
| 501 | }\r |
| 502 | \r |
| 503 | Status = DiskIo->ReadDisk (\r |
| 504 | DiskIo,\r |
| 505 | BlockIo->Media->MediaId,\r |
| 506 | MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),\r |
| 507 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r |
| 508 | Ptr\r |
| 509 | );\r |
| 510 | if (EFI_ERROR (Status)) {\r |
| 511 | FreePool (Ptr);\r |
| 512 | return FALSE;\r |
| 513 | }\r |
| 514 | \r |
| 515 | Size = PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry;\r |
| 516 | \r |
| 517 | Status = gBS->CalculateCrc32 (Ptr, Size, &Crc);\r |
| 518 | if (EFI_ERROR (Status)) {\r |
| 519 | DEBUG ((EFI_D_ERROR, "CheckPEntryArrayCRC: Crc calculation failed\n"));\r |
| 520 | FreePool (Ptr);\r |
| 521 | return FALSE;\r |
| 522 | }\r |
| 523 | \r |
| 524 | FreePool (Ptr);\r |
| 525 | \r |
| 526 | return (BOOLEAN) (PartHeader->PartitionEntryArrayCRC32 == Crc);\r |
| 527 | }\r |
| 528 | \r |
| 529 | \r |
| 530 | /**\r |
| 531 | Restore Partition Table to its alternate place\r |
| 532 | (Primary -> Backup or Backup -> Primary)\r |
| 533 | \r |
| 534 | @param[in] BlockIo Parent BlockIo interface\r |
| 535 | @param[in] DiskIo Disk Io Protocol.\r |
| 536 | @param[in] PartHeader Partition table header structure\r |
| 537 | \r |
| 538 | @retval TRUE Restoring succeeds\r |
| 539 | @retval FALSE Restoring failed\r |
| 540 | \r |
| 541 | **/\r |
| 542 | BOOLEAN\r |
| 543 | PartitionRestoreGptTable (\r |
| 544 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 545 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 546 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 547 | )\r |
| 548 | {\r |
| 549 | EFI_STATUS Status;\r |
| 550 | UINTN BlockSize;\r |
| 551 | EFI_PARTITION_TABLE_HEADER *PartHdr;\r |
| 552 | EFI_LBA PEntryLBA;\r |
| 553 | UINT8 *Ptr;\r |
| 554 | \r |
| 555 | PartHdr = NULL;\r |
| 556 | Ptr = NULL;\r |
| 557 | \r |
| 558 | BlockSize = BlockIo->Media->BlockSize;\r |
| 559 | \r |
| 560 | PartHdr = AllocateZeroPool (BlockSize);\r |
| 561 | \r |
| 562 | if (PartHdr == NULL) {\r |
| 563 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r |
| 564 | return FALSE;\r |
| 565 | }\r |
| 566 | \r |
| 567 | PEntryLBA = (PartHeader->MyLBA == PRIMARY_PART_HEADER_LBA) ? \\r |
| 568 | (PartHeader->LastUsableLBA + 1) : \\r |
| 569 | (PRIMARY_PART_HEADER_LBA + 1);\r |
| 570 | \r |
| 571 | CopyMem (PartHdr, PartHeader, sizeof (EFI_PARTITION_TABLE_HEADER));\r |
| 572 | \r |
| 573 | PartHdr->MyLBA = PartHeader->AlternateLBA;\r |
| 574 | PartHdr->AlternateLBA = PartHeader->MyLBA;\r |
| 575 | PartHdr->PartitionEntryLBA = PEntryLBA;\r |
| 576 | PartitionSetCrc ((EFI_TABLE_HEADER *) PartHdr);\r |
| 577 | \r |
| 578 | Status = BlockIo->WriteBlocks (BlockIo, BlockIo->Media->MediaId, PartHdr->MyLBA, BlockSize, PartHdr);\r |
| 579 | if (EFI_ERROR (Status)) {\r |
| 580 | goto Done;\r |
| 581 | }\r |
| 582 | \r |
| 583 | Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);\r |
| 584 | if (Ptr == NULL) {\r |
| 585 | DEBUG ((EFI_D_ERROR, " Allocate pool effor\n"));\r |
| 586 | Status = EFI_OUT_OF_RESOURCES;\r |
| 587 | goto Done;\r |
| 588 | }\r |
| 589 | \r |
| 590 | Status = DiskIo->ReadDisk (\r |
| 591 | DiskIo,\r |
| 592 | BlockIo->Media->MediaId,\r |
| 593 | MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),\r |
| 594 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r |
| 595 | Ptr\r |
| 596 | );\r |
| 597 | if (EFI_ERROR (Status)) {\r |
| 598 | goto Done;\r |
| 599 | }\r |
| 600 | \r |
| 601 | Status = DiskIo->WriteDisk (\r |
| 602 | DiskIo,\r |
| 603 | BlockIo->Media->MediaId,\r |
| 604 | MultU64x32(PEntryLBA, BlockIo->Media->BlockSize),\r |
| 605 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r |
| 606 | Ptr\r |
| 607 | );\r |
| 608 | \r |
| 609 | Done:\r |
| 610 | FreePool (PartHdr);\r |
| 611 | FreePool (Ptr);\r |
| 612 | \r |
| 613 | if (EFI_ERROR (Status)) {\r |
| 614 | return FALSE;\r |
| 615 | }\r |
| 616 | \r |
| 617 | return TRUE;\r |
| 618 | }\r |
| 619 | \r |
| 620 | \r |
| 621 | /**\r |
| ea7cb08c |
622 | Restore Partition Table to its alternate place.\r |
| adbcbf8f |
623 | (Primary -> Backup or Backup -> Primary)\r |
| 624 | \r |
| 625 | @param[in] PartHeader Partition table header structure\r |
| 626 | @param[in] PartEntry The partition entry array\r |
| 627 | @param[out] PEntryStatus the partition entry status array \r |
| 628 | recording the status of each partition\r |
| a8d0c20e |
629 | \r |
| adbcbf8f |
630 | **/\r |
| 631 | VOID\r |
| 632 | PartitionCheckGptEntry (\r |
| 633 | IN EFI_PARTITION_TABLE_HEADER *PartHeader,\r |
| 634 | IN EFI_PARTITION_ENTRY *PartEntry,\r |
| 635 | OUT EFI_PARTITION_ENTRY_STATUS *PEntryStatus\r |
| 636 | )\r |
| 637 | {\r |
| 638 | EFI_LBA StartingLBA;\r |
| 639 | EFI_LBA EndingLBA;\r |
| 640 | UINTN Index1;\r |
| 641 | UINTN Index2;\r |
| 642 | \r |
| 643 | DEBUG ((EFI_D_INFO, " start check partition entries\n"));\r |
| 644 | for (Index1 = 0; Index1 < PartHeader->NumberOfPartitionEntries; Index1++) {\r |
| 645 | if (CompareGuid (&PartEntry[Index1].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {\r |
| 646 | continue;\r |
| 647 | }\r |
| 648 | \r |
| 649 | StartingLBA = PartEntry[Index1].StartingLBA;\r |
| 650 | EndingLBA = PartEntry[Index1].EndingLBA;\r |
| 651 | if (StartingLBA > EndingLBA ||\r |
| 652 | StartingLBA < PartHeader->FirstUsableLBA ||\r |
| 653 | StartingLBA > PartHeader->LastUsableLBA ||\r |
| 654 | EndingLBA < PartHeader->FirstUsableLBA ||\r |
| 655 | EndingLBA > PartHeader->LastUsableLBA\r |
| 656 | ) {\r |
| 657 | PEntryStatus[Index1].OutOfRange = TRUE;\r |
| 658 | continue;\r |
| 659 | }\r |
| 660 | \r |
| 661 | for (Index2 = Index1 + 1; Index2 < PartHeader->NumberOfPartitionEntries; Index2++) {\r |
| 662 | \r |
| 663 | if (CompareGuid (&PartEntry[Index2].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {\r |
| 664 | continue;\r |
| 665 | }\r |
| 666 | \r |
| 667 | if (PartEntry[Index2].EndingLBA >= StartingLBA && PartEntry[Index2].StartingLBA <= EndingLBA) {\r |
| 668 | //\r |
| 669 | // This region overlaps with the Index1'th region\r |
| 670 | //\r |
| 671 | PEntryStatus[Index1].Overlap = TRUE;\r |
| 672 | PEntryStatus[Index2].Overlap = TRUE;\r |
| 673 | continue;\r |
| 674 | \r |
| 675 | }\r |
| 676 | }\r |
| 677 | }\r |
| 678 | \r |
| 679 | DEBUG ((EFI_D_INFO, " End check partition entries\n"));\r |
| 680 | }\r |
| 681 | \r |
| 682 | \r |
| 683 | /**\r |
| ea7cb08c |
684 | Updates the CRC32 value in the table header.\r |
| adbcbf8f |
685 | \r |
| a8d0c20e |
686 | @param Hdr Table to update\r |
| adbcbf8f |
687 | \r |
| 688 | **/\r |
| 689 | VOID\r |
| 690 | PartitionSetCrc (\r |
| 691 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 692 | )\r |
| 693 | {\r |
| 694 | PartitionSetCrcAltSize (Hdr->HeaderSize, Hdr);\r |
| 695 | }\r |
| 696 | \r |
| 697 | \r |
| 698 | /**\r |
| ea7cb08c |
699 | Updates the CRC32 value in the table header.\r |
| adbcbf8f |
700 | \r |
| a8d0c20e |
701 | @param Size The size of the table\r |
| 702 | @param Hdr Table to update\r |
| adbcbf8f |
703 | \r |
| 704 | **/\r |
| 705 | VOID\r |
| 706 | PartitionSetCrcAltSize (\r |
| 707 | IN UINTN Size,\r |
| 708 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 709 | )\r |
| adbcbf8f |
710 | {\r |
| 711 | UINT32 Crc;\r |
| 712 | \r |
| 713 | Hdr->CRC32 = 0;\r |
| 714 | gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);\r |
| 715 | Hdr->CRC32 = Crc;\r |
| 716 | }\r |
| 717 | \r |
| 718 | \r |
| 719 | /**\r |
| ea7cb08c |
720 | Checks the CRC32 value in the table header.\r |
| adbcbf8f |
721 | \r |
| a8d0c20e |
722 | @param MaxSize Max Size limit\r |
| 723 | @param Hdr Table to check\r |
| adbcbf8f |
724 | \r |
| a8d0c20e |
725 | @return TRUE CRC Valid\r |
| 726 | @return FALSE CRC Invalid\r |
| adbcbf8f |
727 | \r |
| 728 | **/\r |
| 729 | BOOLEAN\r |
| 730 | PartitionCheckCrc (\r |
| 731 | IN UINTN MaxSize,\r |
| 732 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 733 | )\r |
| 734 | {\r |
| 735 | return PartitionCheckCrcAltSize (MaxSize, Hdr->HeaderSize, Hdr);\r |
| 736 | }\r |
| 737 | \r |
| 738 | \r |
| 739 | /**\r |
| ea7cb08c |
740 | Checks the CRC32 value in the table header.\r |
| adbcbf8f |
741 | \r |
| a8d0c20e |
742 | @param MaxSize Max Size limit\r |
| 743 | @param Size The size of the table\r |
| 744 | @param Hdr Table to check\r |
| adbcbf8f |
745 | \r |
| 746 | @return TRUE CRC Valid\r |
| 747 | @return FALSE CRC Invalid\r |
| 748 | \r |
| 749 | **/\r |
| 750 | BOOLEAN\r |
| 751 | PartitionCheckCrcAltSize (\r |
| 752 | IN UINTN MaxSize,\r |
| 753 | IN UINTN Size,\r |
| 754 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 755 | )\r |
| 756 | {\r |
| 757 | UINT32 Crc;\r |
| 758 | UINT32 OrgCrc;\r |
| 759 | EFI_STATUS Status;\r |
| 760 | \r |
| 761 | Crc = 0;\r |
| 762 | \r |
| 763 | if (Size == 0) {\r |
| 764 | //\r |
| 765 | // If header size is 0 CRC will pass so return FALSE here\r |
| 766 | //\r |
| 767 | return FALSE;\r |
| 768 | }\r |
| 769 | \r |
| ea7cb08c |
770 | if ((MaxSize != 0) && (Size > MaxSize)) {\r |
| adbcbf8f |
771 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Size > MaxSize\n"));\r |
| 772 | return FALSE;\r |
| 773 | }\r |
| 774 | //\r |
| 775 | // clear old crc from header\r |
| 776 | //\r |
| 777 | OrgCrc = Hdr->CRC32;\r |
| 778 | Hdr->CRC32 = 0;\r |
| 779 | \r |
| 780 | Status = gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);\r |
| 781 | if (EFI_ERROR (Status)) {\r |
| 782 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc calculation failed\n"));\r |
| 783 | return FALSE;\r |
| 784 | }\r |
| 785 | //\r |
| 786 | // set results\r |
| 787 | //\r |
| 788 | Hdr->CRC32 = Crc;\r |
| 789 | \r |
| 790 | //\r |
| 791 | // return status\r |
| 792 | //\r |
| 793 | DEBUG_CODE_BEGIN ();\r |
| 794 | if (OrgCrc != Crc) {\r |
| 795 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc check failed\n"));\r |
| 796 | }\r |
| 797 | DEBUG_CODE_END ();\r |
| 798 | \r |
| 799 | return (BOOLEAN) (OrgCrc == Crc);\r |
| 800 | }\r |
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