projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | |
| e5eed7d3 HT |
5 | Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r |
| 6 | This program and the accompanying materials\r | |
| f42be642 | 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 | |
| ff61847d | 192 | EFI_STATUS GptValidStatus;\r |
| adbcbf8f | 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 | |
| 7df7393f | 205 | DEBUG ((EFI_D_INFO, " LastBlock : %lx \n", LastBlock));\r |
| adbcbf8f | 206 | \r |
| ff61847d | 207 | GptValidStatus = EFI_NOT_FOUND;\r |
| adbcbf8f | 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 | |
| 96f99e1d | 220 | Status = DiskIo->ReadDisk (\r |
| 221 | DiskIo,\r | |
| 222 | BlockIo->Media->MediaId,\r | |
| 223 | 0,\r | |
| 224 | BlockIo->Media->BlockSize,\r | |
| 225 | ProtectiveMbr\r | |
| 226 | );\r | |
| adbcbf8f | 227 | if (EFI_ERROR (Status)) {\r |
| ff61847d | 228 | GptValidStatus = Status;\r |
| adbcbf8f | 229 | goto Done;\r |
| 230 | }\r | |
| 231 | //\r | |
| 232 | // Verify that the Protective MBR is valid\r | |
| 233 | //\r | |
| 339c754a | 234 | for (Index = 0; Index < MAX_MBR_PARTITIONS; Index++) {\r |
| 235 | if (ProtectiveMbr->Partition[Index].BootIndicator == 0x00 &&\r | |
| 236 | ProtectiveMbr->Partition[Index].OSIndicator == PMBR_GPT_PARTITION &&\r | |
| 237 | UNPACK_UINT32 (ProtectiveMbr->Partition[Index].StartingLBA) == 1\r | |
| 238 | ) {\r | |
| 239 | break;\r | |
| 240 | }\r | |
| 241 | }\r | |
| 242 | if (Index == MAX_MBR_PARTITIONS) {\r | |
| adbcbf8f | 243 | goto Done;\r |
| 244 | }\r | |
| 245 | \r | |
| 246 | //\r | |
| 247 | // Allocate the GPT structures\r | |
| 248 | //\r | |
| 249 | PrimaryHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));\r | |
| 250 | if (PrimaryHeader == NULL) {\r | |
| 251 | goto Done;\r | |
| 252 | }\r | |
| 253 | \r | |
| 254 | BackupHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));\r | |
| adbcbf8f | 255 | if (BackupHeader == NULL) {\r |
| 256 | goto Done;\r | |
| 257 | }\r | |
| 258 | \r | |
| 259 | //\r | |
| 260 | // Check primary and backup partition tables\r | |
| 261 | //\r | |
| 262 | if (!PartitionValidGptTable (BlockIo, DiskIo, PRIMARY_PART_HEADER_LBA, PrimaryHeader)) {\r | |
| 263 | DEBUG ((EFI_D_INFO, " Not Valid primary partition table\n"));\r | |
| 264 | \r | |
| 265 | if (!PartitionValidGptTable (BlockIo, DiskIo, LastBlock, BackupHeader)) {\r | |
| 266 | DEBUG ((EFI_D_INFO, " Not Valid backup partition table\n"));\r | |
| 267 | goto Done;\r | |
| 268 | } else {\r | |
| 269 | DEBUG ((EFI_D_INFO, " Valid backup partition table\n"));\r | |
| 270 | DEBUG ((EFI_D_INFO, " Restore primary partition table by the backup\n"));\r | |
| 271 | if (!PartitionRestoreGptTable (BlockIo, DiskIo, BackupHeader)) {\r | |
| 272 | DEBUG ((EFI_D_INFO, " Restore primary partition table error\n"));\r | |
| 273 | }\r | |
| 274 | \r | |
| 275 | if (PartitionValidGptTable (BlockIo, DiskIo, BackupHeader->AlternateLBA, PrimaryHeader)) {\r | |
| 276 | DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));\r | |
| 277 | }\r | |
| 278 | }\r | |
| 279 | } else if (!PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {\r | |
| 280 | DEBUG ((EFI_D_INFO, " Valid primary and !Valid backup partition table\n"));\r | |
| 281 | DEBUG ((EFI_D_INFO, " Restore backup partition table by the primary\n"));\r | |
| 282 | if (!PartitionRestoreGptTable (BlockIo, DiskIo, PrimaryHeader)) {\r | |
| 283 | DEBUG ((EFI_D_INFO, " Restore backup partition table error\n"));\r | |
| 284 | }\r | |
| 285 | \r | |
| 286 | if (PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {\r | |
| 287 | DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));\r | |
| 288 | }\r | |
| 289 | \r | |
| 290 | }\r | |
| 291 | \r | |
| 292 | DEBUG ((EFI_D_INFO, " Valid primary and Valid backup partition table\n"));\r | |
| 293 | \r | |
| 294 | //\r | |
| 295 | // Read the EFI Partition Entries\r | |
| 296 | //\r | |
| 297 | PartEntry = AllocatePool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY));\r | |
| 298 | if (PartEntry == NULL) {\r | |
| 299 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r | |
| 300 | goto Done;\r | |
| 301 | }\r | |
| 302 | \r | |
| 303 | Status = DiskIo->ReadDisk (\r | |
| 7059dad9 | 304 | DiskIo,\r |
| 305 | BlockIo->Media->MediaId,\r | |
| 306 | MultU64x32(PrimaryHeader->PartitionEntryLBA, BlockSize),\r | |
| 307 | PrimaryHeader->NumberOfPartitionEntries * (PrimaryHeader->SizeOfPartitionEntry),\r | |
| 308 | PartEntry\r | |
| 309 | );\r | |
| adbcbf8f | 310 | if (EFI_ERROR (Status)) {\r |
| ff61847d | 311 | GptValidStatus = Status;\r |
| 96f99e1d | 312 | DEBUG ((EFI_D_ERROR, " Partition Entry ReadDisk error\n"));\r |
| adbcbf8f | 313 | goto Done;\r |
| 314 | }\r | |
| 315 | \r | |
| 316 | DEBUG ((EFI_D_INFO, " Partition entries read block success\n"));\r | |
| 317 | \r | |
| 318 | DEBUG ((EFI_D_INFO, " Number of partition entries: %d\n", PrimaryHeader->NumberOfPartitionEntries));\r | |
| 319 | \r | |
| 320 | PEntryStatus = AllocateZeroPool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY_STATUS));\r | |
| 321 | if (PEntryStatus == NULL) {\r | |
| 322 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r | |
| 323 | goto Done;\r | |
| 324 | }\r | |
| 325 | \r | |
| 326 | //\r | |
| 327 | // Check the integrity of partition entries\r | |
| 328 | //\r | |
| 329 | PartitionCheckGptEntry (PrimaryHeader, PartEntry, PEntryStatus);\r | |
| 330 | \r | |
| 331 | //\r | |
| 332 | // If we got this far the GPT layout of the disk is valid and we should return true\r | |
| 333 | //\r | |
| ff61847d | 334 | GptValidStatus = EFI_SUCCESS;\r |
| adbcbf8f | 335 | \r |
| 336 | //\r | |
| 337 | // Create child device handles\r | |
| 338 | //\r | |
| 339 | for (Index = 0; Index < PrimaryHeader->NumberOfPartitionEntries; Index++) {\r | |
| 340 | if (CompareGuid (&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeUnusedGuid) ||\r | |
| 341 | PEntryStatus[Index].OutOfRange ||\r | |
| 47e1a80b | 342 | PEntryStatus[Index].Overlap ||\r |
| 343 | PEntryStatus[Index].OsSpecific\r | |
| adbcbf8f | 344 | ) {\r |
| 345 | //\r | |
| 47e1a80b | 346 | // Don't use null EFI Partition Entries, Invalid Partition Entries or OS specific\r |
| 347 | // partition Entries\r | |
| adbcbf8f | 348 | //\r |
| 349 | continue;\r | |
| 350 | }\r | |
| 351 | \r | |
| 352 | ZeroMem (&HdDev, sizeof (HdDev));\r | |
| 353 | HdDev.Header.Type = MEDIA_DEVICE_PATH;\r | |
| 354 | HdDev.Header.SubType = MEDIA_HARDDRIVE_DP;\r | |
| 355 | SetDevicePathNodeLength (&HdDev.Header, sizeof (HdDev));\r | |
| 356 | \r | |
| 357 | HdDev.PartitionNumber = (UINT32) Index + 1;\r | |
| 358 | HdDev.MBRType = MBR_TYPE_EFI_PARTITION_TABLE_HEADER;\r | |
| 359 | HdDev.SignatureType = SIGNATURE_TYPE_GUID;\r | |
| 360 | HdDev.PartitionStart = PartEntry[Index].StartingLBA;\r | |
| 361 | HdDev.PartitionSize = PartEntry[Index].EndingLBA - PartEntry[Index].StartingLBA + 1;\r | |
| 362 | CopyMem (HdDev.Signature, &PartEntry[Index].UniquePartitionGUID, sizeof (EFI_GUID));\r | |
| 363 | \r | |
| ff61847d | 364 | DEBUG ((EFI_D_INFO, " Index : %d\n", (UINT32) Index));\r |
| 365 | DEBUG ((EFI_D_INFO, " Start LBA : %lx\n", (UINT64) HdDev.PartitionStart));\r | |
| 366 | DEBUG ((EFI_D_INFO, " End LBA : %lx\n", (UINT64) PartEntry[Index].EndingLBA));\r | |
| 367 | DEBUG ((EFI_D_INFO, " Partition size: %lx\n", (UINT64) HdDev.PartitionSize));\r | |
| 368 | DEBUG ((EFI_D_INFO, " Start : %lx", MultU64x32 (PartEntry[Index].StartingLBA, BlockSize)));\r | |
| 369 | DEBUG ((EFI_D_INFO, " End : %lx\n", MultU64x32 (PartEntry[Index].EndingLBA, BlockSize)));\r | |
| adbcbf8f | 370 | \r |
| 371 | Status = PartitionInstallChildHandle (\r | |
| 372 | This,\r | |
| 373 | Handle,\r | |
| 374 | DiskIo,\r | |
| 375 | BlockIo,\r | |
| 376 | DevicePath,\r | |
| 377 | (EFI_DEVICE_PATH_PROTOCOL *) &HdDev,\r | |
| 378 | PartEntry[Index].StartingLBA,\r | |
| 379 | PartEntry[Index].EndingLBA,\r | |
| 380 | BlockSize,\r | |
| 381 | CompareGuid(&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeSystemPartGuid)\r | |
| 382 | );\r | |
| 383 | }\r | |
| 384 | \r | |
| 385 | DEBUG ((EFI_D_INFO, "Prepare to Free Pool\n"));\r | |
| 386 | \r | |
| 387 | Done:\r | |
| 388 | if (ProtectiveMbr != NULL) {\r | |
| 389 | FreePool (ProtectiveMbr);\r | |
| 390 | }\r | |
| 391 | if (PrimaryHeader != NULL) {\r | |
| 392 | FreePool (PrimaryHeader);\r | |
| 393 | }\r | |
| 394 | if (BackupHeader != NULL) {\r | |
| 395 | FreePool (BackupHeader);\r | |
| 396 | }\r | |
| 397 | if (PartEntry != NULL) {\r | |
| 398 | FreePool (PartEntry);\r | |
| 399 | }\r | |
| 400 | if (PEntryStatus != NULL) {\r | |
| 401 | FreePool (PEntryStatus);\r | |
| 402 | }\r | |
| 403 | \r | |
| ff61847d | 404 | return GptValidStatus;\r |
| adbcbf8f | 405 | }\r |
| 406 | \r | |
| 407 | \r | |
| 408 | /**\r | |
| 409 | Install child handles if the Handle supports GPT partition structure.\r | |
| 410 | \r | |
| 411 | @param[in] BlockIo Parent BlockIo interface\r | |
| 412 | @param[in] DiskIo Disk Io protocol.\r | |
| 413 | @param[in] Lba The starting Lba of the Partition Table\r | |
| a8d0c20e | 414 | @param[out] PartHeader Stores the partition table that is read\r |
| adbcbf8f | 415 | \r |
| 416 | @retval TRUE The partition table is valid\r | |
| 417 | @retval FALSE The partition table is not valid\r | |
| 418 | \r | |
| 419 | **/\r | |
| 420 | BOOLEAN\r | |
| 421 | PartitionValidGptTable (\r | |
| 422 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
| 423 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
| 424 | IN EFI_LBA Lba,\r | |
| 425 | OUT EFI_PARTITION_TABLE_HEADER *PartHeader\r | |
| 426 | )\r | |
| 427 | {\r | |
| 428 | EFI_STATUS Status;\r | |
| 429 | UINT32 BlockSize;\r | |
| 430 | EFI_PARTITION_TABLE_HEADER *PartHdr;\r | |
| 431 | \r | |
| 432 | BlockSize = BlockIo->Media->BlockSize;\r | |
| 433 | \r | |
| 434 | PartHdr = AllocateZeroPool (BlockSize);\r | |
| 435 | \r | |
| 436 | if (PartHdr == NULL) {\r | |
| 437 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r | |
| 438 | return FALSE;\r | |
| 439 | }\r | |
| 440 | //\r | |
| 441 | // Read the EFI Partition Table Header\r | |
| 442 | //\r | |
| 96f99e1d | 443 | Status = DiskIo->ReadDisk (\r |
| 444 | DiskIo,\r | |
| 445 | BlockIo->Media->MediaId,\r | |
| 7059dad9 | 446 | MultU64x32 (Lba, BlockSize),\r |
| 96f99e1d | 447 | BlockSize,\r |
| 448 | PartHdr\r | |
| 449 | );\r | |
| adbcbf8f | 450 | if (EFI_ERROR (Status)) {\r |
| 451 | FreePool (PartHdr);\r | |
| 452 | return FALSE;\r | |
| 453 | }\r | |
| 454 | \r | |
| cd2d8468 | 455 | if ((PartHdr->Header.Signature != EFI_PTAB_HEADER_ID) ||\r |
| adbcbf8f | 456 | !PartitionCheckCrc (BlockSize, &PartHdr->Header) ||\r |
| 457 | PartHdr->MyLBA != Lba\r | |
| 458 | ) {\r | |
| ff61847d | 459 | DEBUG ((EFI_D_INFO, "Invalid efi partition table header\n"));\r |
| adbcbf8f | 460 | FreePool (PartHdr);\r |
| 461 | return FALSE;\r | |
| 462 | }\r | |
| 463 | \r | |
| 464 | CopyMem (PartHeader, PartHdr, sizeof (EFI_PARTITION_TABLE_HEADER));\r | |
| 465 | if (!PartitionCheckGptEntryArrayCRC (BlockIo, DiskIo, PartHeader)) {\r | |
| 466 | FreePool (PartHdr);\r | |
| 467 | return FALSE;\r | |
| 468 | }\r | |
| 469 | \r | |
| 470 | DEBUG ((EFI_D_INFO, " Valid efi partition table header\n"));\r | |
| 471 | FreePool (PartHdr);\r | |
| 472 | return TRUE;\r | |
| 473 | }\r | |
| 474 | \r | |
| 475 | \r | |
| 476 | /**\r | |
| 477 | Check if the CRC field in the Partition table header is valid\r | |
| 478 | for Partition entry array.\r | |
| 479 | \r | |
| 480 | @param[in] BlockIo Parent BlockIo interface\r | |
| 481 | @param[in] DiskIo Disk Io Protocol.\r | |
| 482 | @param[in] PartHeader Partition table header structure\r | |
| 483 | \r | |
| 484 | @retval TRUE the CRC is valid\r | |
| 485 | @retval FALSE the CRC is invalid\r | |
| 486 | \r | |
| 487 | **/\r | |
| 488 | BOOLEAN\r | |
| 489 | PartitionCheckGptEntryArrayCRC (\r | |
| 490 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
| 491 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
| 492 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r | |
| 493 | )\r | |
| 494 | {\r | |
| 495 | EFI_STATUS Status;\r | |
| 496 | UINT8 *Ptr;\r | |
| 497 | UINT32 Crc;\r | |
| 498 | UINTN Size;\r | |
| 499 | \r | |
| 500 | //\r | |
| 501 | // Read the EFI Partition Entries\r | |
| 502 | //\r | |
| 503 | Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);\r | |
| 504 | if (Ptr == NULL) {\r | |
| 505 | DEBUG ((EFI_D_ERROR, " Allocate pool error\n"));\r | |
| 506 | return FALSE;\r | |
| 507 | }\r | |
| 508 | \r | |
| 509 | Status = DiskIo->ReadDisk (\r | |
| 510 | DiskIo,\r | |
| 511 | BlockIo->Media->MediaId,\r | |
| 512 | MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),\r | |
| 513 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r | |
| 514 | Ptr\r | |
| 515 | );\r | |
| 516 | if (EFI_ERROR (Status)) {\r | |
| 517 | FreePool (Ptr);\r | |
| 518 | return FALSE;\r | |
| 519 | }\r | |
| 520 | \r | |
| 521 | Size = PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry;\r | |
| 522 | \r | |
| 523 | Status = gBS->CalculateCrc32 (Ptr, Size, &Crc);\r | |
| 524 | if (EFI_ERROR (Status)) {\r | |
| 525 | DEBUG ((EFI_D_ERROR, "CheckPEntryArrayCRC: Crc calculation failed\n"));\r | |
| 526 | FreePool (Ptr);\r | |
| 527 | return FALSE;\r | |
| 528 | }\r | |
| 529 | \r | |
| 530 | FreePool (Ptr);\r | |
| 531 | \r | |
| 532 | return (BOOLEAN) (PartHeader->PartitionEntryArrayCRC32 == Crc);\r | |
| 533 | }\r | |
| 534 | \r | |
| 535 | \r | |
| 536 | /**\r | |
| 537 | Restore Partition Table to its alternate place\r | |
| 538 | (Primary -> Backup or Backup -> Primary)\r | |
| 539 | \r | |
| 540 | @param[in] BlockIo Parent BlockIo interface\r | |
| 541 | @param[in] DiskIo Disk Io Protocol.\r | |
| 542 | @param[in] PartHeader Partition table header structure\r | |
| 543 | \r | |
| 544 | @retval TRUE Restoring succeeds\r | |
| 545 | @retval FALSE Restoring failed\r | |
| 546 | \r | |
| 547 | **/\r | |
| 548 | BOOLEAN\r | |
| 549 | PartitionRestoreGptTable (\r | |
| 550 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r | |
| 551 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r | |
| 552 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r | |
| 553 | )\r | |
| 554 | {\r | |
| 555 | EFI_STATUS Status;\r | |
| 556 | UINTN BlockSize;\r | |
| 557 | EFI_PARTITION_TABLE_HEADER *PartHdr;\r | |
| 558 | EFI_LBA PEntryLBA;\r | |
| 559 | UINT8 *Ptr;\r | |
| 560 | \r | |
| 561 | PartHdr = NULL;\r | |
| 562 | Ptr = NULL;\r | |
| 563 | \r | |
| 564 | BlockSize = BlockIo->Media->BlockSize;\r | |
| 565 | \r | |
| 566 | PartHdr = AllocateZeroPool (BlockSize);\r | |
| 567 | \r | |
| 568 | if (PartHdr == NULL) {\r | |
| 569 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r | |
| 570 | return FALSE;\r | |
| 571 | }\r | |
| 572 | \r | |
| 573 | PEntryLBA = (PartHeader->MyLBA == PRIMARY_PART_HEADER_LBA) ? \\r | |
| 574 | (PartHeader->LastUsableLBA + 1) : \\r | |
| 575 | (PRIMARY_PART_HEADER_LBA + 1);\r | |
| 576 | \r | |
| 577 | CopyMem (PartHdr, PartHeader, sizeof (EFI_PARTITION_TABLE_HEADER));\r | |
| 578 | \r | |
| 579 | PartHdr->MyLBA = PartHeader->AlternateLBA;\r | |
| 580 | PartHdr->AlternateLBA = PartHeader->MyLBA;\r | |
| 581 | PartHdr->PartitionEntryLBA = PEntryLBA;\r | |
| 582 | PartitionSetCrc ((EFI_TABLE_HEADER *) PartHdr);\r | |
| 583 | \r | |
| 071b7221 | 584 | Status = DiskIo->WriteDisk (\r |
| 585 | DiskIo,\r | |
| 586 | BlockIo->Media->MediaId,\r | |
| 587 | MultU64x32 (PartHdr->MyLBA, BlockIo->Media->BlockSize),\r | |
| 588 | BlockSize,\r | |
| 589 | PartHdr\r | |
| 590 | );\r | |
| adbcbf8f | 591 | if (EFI_ERROR (Status)) {\r |
| 592 | goto Done;\r | |
| 593 | }\r | |
| 594 | \r | |
| 595 | Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);\r | |
| 596 | if (Ptr == NULL) {\r | |
| 071b7221 | 597 | DEBUG ((EFI_D_ERROR, " Allocate pool error\n"));\r |
| adbcbf8f | 598 | Status = EFI_OUT_OF_RESOURCES;\r |
| 599 | goto Done;\r | |
| 600 | }\r | |
| 601 | \r | |
| 602 | Status = DiskIo->ReadDisk (\r | |
| 603 | DiskIo,\r | |
| 604 | BlockIo->Media->MediaId,\r | |
| 605 | MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),\r | |
| 606 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r | |
| 607 | Ptr\r | |
| 608 | );\r | |
| 609 | if (EFI_ERROR (Status)) {\r | |
| 610 | goto Done;\r | |
| 611 | }\r | |
| 612 | \r | |
| 613 | Status = DiskIo->WriteDisk (\r | |
| 614 | DiskIo,\r | |
| 615 | BlockIo->Media->MediaId,\r | |
| 616 | MultU64x32(PEntryLBA, BlockIo->Media->BlockSize),\r | |
| 617 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r | |
| 618 | Ptr\r | |
| 619 | );\r | |
| 620 | \r | |
| 621 | Done:\r | |
| 622 | FreePool (PartHdr);\r | |
| ff61847d | 623 | \r |
| 624 | if (Ptr != NULL) {\r | |
| 625 | FreePool (Ptr);\r | |
| 626 | }\r | |
| adbcbf8f | 627 | \r |
| 628 | if (EFI_ERROR (Status)) {\r | |
| 629 | return FALSE;\r | |
| 630 | }\r | |
| 631 | \r | |
| 632 | return TRUE;\r | |
| 633 | }\r | |
| 634 | \r | |
| 635 | \r | |
| 636 | /**\r | |
| ea7cb08c | 637 | Restore Partition Table to its alternate place.\r |
| adbcbf8f | 638 | (Primary -> Backup or Backup -> Primary)\r |
| 639 | \r | |
| 640 | @param[in] PartHeader Partition table header structure\r | |
| 641 | @param[in] PartEntry The partition entry array\r | |
| 642 | @param[out] PEntryStatus the partition entry status array \r | |
| 643 | recording the status of each partition\r | |
| a8d0c20e | 644 | \r |
| adbcbf8f | 645 | **/\r |
| 646 | VOID\r | |
| 647 | PartitionCheckGptEntry (\r | |
| 648 | IN EFI_PARTITION_TABLE_HEADER *PartHeader,\r | |
| 649 | IN EFI_PARTITION_ENTRY *PartEntry,\r | |
| 650 | OUT EFI_PARTITION_ENTRY_STATUS *PEntryStatus\r | |
| 651 | )\r | |
| 652 | {\r | |
| 653 | EFI_LBA StartingLBA;\r | |
| 654 | EFI_LBA EndingLBA;\r | |
| 655 | UINTN Index1;\r | |
| 656 | UINTN Index2;\r | |
| 47e1a80b | 657 | UINT64 Attributes;\r |
| adbcbf8f | 658 | \r |
| 659 | DEBUG ((EFI_D_INFO, " start check partition entries\n"));\r | |
| 660 | for (Index1 = 0; Index1 < PartHeader->NumberOfPartitionEntries; Index1++) {\r | |
| 661 | if (CompareGuid (&PartEntry[Index1].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {\r | |
| 662 | continue;\r | |
| 663 | }\r | |
| 664 | \r | |
| 665 | StartingLBA = PartEntry[Index1].StartingLBA;\r | |
| 666 | EndingLBA = PartEntry[Index1].EndingLBA;\r | |
| 667 | if (StartingLBA > EndingLBA ||\r | |
| 668 | StartingLBA < PartHeader->FirstUsableLBA ||\r | |
| 669 | StartingLBA > PartHeader->LastUsableLBA ||\r | |
| 670 | EndingLBA < PartHeader->FirstUsableLBA ||\r | |
| 671 | EndingLBA > PartHeader->LastUsableLBA\r | |
| 672 | ) {\r | |
| 673 | PEntryStatus[Index1].OutOfRange = TRUE;\r | |
| 674 | continue;\r | |
| 675 | }\r | |
| 676 | \r | |
| 677 | for (Index2 = Index1 + 1; Index2 < PartHeader->NumberOfPartitionEntries; Index2++) {\r | |
| 678 | \r | |
| 679 | if (CompareGuid (&PartEntry[Index2].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {\r | |
| 680 | continue;\r | |
| 681 | }\r | |
| 682 | \r | |
| 683 | if (PartEntry[Index2].EndingLBA >= StartingLBA && PartEntry[Index2].StartingLBA <= EndingLBA) {\r | |
| 684 | //\r | |
| 685 | // This region overlaps with the Index1'th region\r | |
| 686 | //\r | |
| 687 | PEntryStatus[Index1].Overlap = TRUE;\r | |
| 688 | PEntryStatus[Index2].Overlap = TRUE;\r | |
| 689 | continue;\r | |
| 690 | \r | |
| 691 | }\r | |
| 692 | }\r | |
| 47e1a80b | 693 | \r |
| 694 | Attributes = PartEntry[Index1].Attributes;\r | |
| 695 | if ((Attributes & BIT1) != 0) {\r | |
| 696 | //\r | |
| 697 | // If Bit 1 is set, this indicate that this is an OS specific GUID partition. \r | |
| 698 | //\r | |
| 699 | PEntryStatus[Index1].OsSpecific = TRUE;\r | |
| 700 | }\r | |
| adbcbf8f | 701 | }\r |
| 702 | \r | |
| 703 | DEBUG ((EFI_D_INFO, " End check partition entries\n"));\r | |
| 704 | }\r | |
| 705 | \r | |
| 706 | \r | |
| 707 | /**\r | |
| ea7cb08c | 708 | Updates the CRC32 value in the table header.\r |
| adbcbf8f | 709 | \r |
| a8d0c20e | 710 | @param Hdr Table to update\r |
| adbcbf8f | 711 | \r |
| 712 | **/\r | |
| 713 | VOID\r | |
| 714 | PartitionSetCrc (\r | |
| 715 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
| 716 | )\r | |
| 717 | {\r | |
| 718 | PartitionSetCrcAltSize (Hdr->HeaderSize, Hdr);\r | |
| 719 | }\r | |
| 720 | \r | |
| 721 | \r | |
| 722 | /**\r | |
| ea7cb08c | 723 | Updates the CRC32 value in the table header.\r |
| adbcbf8f | 724 | \r |
| a8d0c20e | 725 | @param Size The size of the table\r |
| 726 | @param Hdr Table to update\r | |
| adbcbf8f | 727 | \r |
| 728 | **/\r | |
| 729 | VOID\r | |
| 730 | PartitionSetCrcAltSize (\r | |
| 731 | IN UINTN Size,\r | |
| 732 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
| 733 | )\r | |
| adbcbf8f | 734 | {\r |
| 735 | UINT32 Crc;\r | |
| 736 | \r | |
| 737 | Hdr->CRC32 = 0;\r | |
| 738 | gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);\r | |
| 739 | Hdr->CRC32 = Crc;\r | |
| 740 | }\r | |
| 741 | \r | |
| 742 | \r | |
| 743 | /**\r | |
| ea7cb08c | 744 | Checks the CRC32 value in the table header.\r |
| adbcbf8f | 745 | \r |
| a8d0c20e | 746 | @param MaxSize Max Size limit\r |
| 747 | @param Hdr Table to check\r | |
| adbcbf8f | 748 | \r |
| a8d0c20e | 749 | @return TRUE CRC Valid\r |
| 750 | @return FALSE CRC Invalid\r | |
| adbcbf8f | 751 | \r |
| 752 | **/\r | |
| 753 | BOOLEAN\r | |
| 754 | PartitionCheckCrc (\r | |
| 755 | IN UINTN MaxSize,\r | |
| 756 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
| 757 | )\r | |
| 758 | {\r | |
| 759 | return PartitionCheckCrcAltSize (MaxSize, Hdr->HeaderSize, Hdr);\r | |
| 760 | }\r | |
| 761 | \r | |
| 762 | \r | |
| 763 | /**\r | |
| ea7cb08c | 764 | Checks the CRC32 value in the table header.\r |
| adbcbf8f | 765 | \r |
| a8d0c20e | 766 | @param MaxSize Max Size limit\r |
| 767 | @param Size The size of the table\r | |
| 768 | @param Hdr Table to check\r | |
| adbcbf8f | 769 | \r |
| 770 | @return TRUE CRC Valid\r | |
| 771 | @return FALSE CRC Invalid\r | |
| 772 | \r | |
| 773 | **/\r | |
| 774 | BOOLEAN\r | |
| 775 | PartitionCheckCrcAltSize (\r | |
| 776 | IN UINTN MaxSize,\r | |
| 777 | IN UINTN Size,\r | |
| 778 | IN OUT EFI_TABLE_HEADER *Hdr\r | |
| 779 | )\r | |
| 780 | {\r | |
| 781 | UINT32 Crc;\r | |
| 782 | UINT32 OrgCrc;\r | |
| 783 | EFI_STATUS Status;\r | |
| 784 | \r | |
| 785 | Crc = 0;\r | |
| 786 | \r | |
| 787 | if (Size == 0) {\r | |
| 788 | //\r | |
| 789 | // If header size is 0 CRC will pass so return FALSE here\r | |
| 790 | //\r | |
| 791 | return FALSE;\r | |
| 792 | }\r | |
| 793 | \r | |
| ea7cb08c | 794 | if ((MaxSize != 0) && (Size > MaxSize)) {\r |
| adbcbf8f | 795 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Size > MaxSize\n"));\r |
| 796 | return FALSE;\r | |
| 797 | }\r | |
| 798 | //\r | |
| 799 | // clear old crc from header\r | |
| 800 | //\r | |
| 801 | OrgCrc = Hdr->CRC32;\r | |
| 802 | Hdr->CRC32 = 0;\r | |
| 803 | \r | |
| 804 | Status = gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);\r | |
| 805 | if (EFI_ERROR (Status)) {\r | |
| 806 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc calculation failed\n"));\r | |
| 807 | return FALSE;\r | |
| 808 | }\r | |
| 809 | //\r | |
| 810 | // set results\r | |
| 811 | //\r | |
| 812 | Hdr->CRC32 = Crc;\r | |
| 813 | \r | |
| 814 | //\r | |
| 815 | // return status\r | |
| 816 | //\r | |
| 817 | DEBUG_CODE_BEGIN ();\r | |
| 818 | if (OrgCrc != Crc) {\r | |
| 819 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc check failed\n"));\r | |
| 820 | }\r | |
| 821 | DEBUG_CODE_END ();\r | |
| 822 | \r | |
| 823 | return (BOOLEAN) (OrgCrc == Crc);\r | |
| 824 | }\r |