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1 | /** @file\r |
| 8a7d75b0 |
2 | Decode a hard disk partitioned with the GPT scheme in the UEFI 2.0\r |
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3 | specification.\r |
| 4 | \r |
| 490b5ea1 |
5 | Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>\r |
| e5eed7d3 |
6 | This program and the accompanying materials\r |
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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 |
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13 | \r |
| 14 | **/\r |
| 15 | \r |
| 16 | \r |
| 17 | #include "Partition.h"\r |
| 18 | \r |
| a8d0c20e |
19 | /**\r |
| 20 | Install child handles if the Handle supports GPT partition structure.\r |
| 21 | \r |
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22 | @param[in] BlockIo Parent BlockIo interface.\r |
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23 | @param[in] DiskIo Disk Io protocol.\r |
| 24 | @param[in] Lba The starting Lba of the Partition Table\r |
| 25 | @param[out] PartHeader Stores the partition table that is read\r |
| 26 | \r |
| 27 | @retval TRUE The partition table is valid\r |
| 28 | @retval FALSE The partition table is not valid\r |
| 29 | \r |
| 30 | **/\r |
| adbcbf8f |
31 | BOOLEAN\r |
| 32 | PartitionValidGptTable (\r |
| 33 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 34 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 35 | IN EFI_LBA Lba,\r |
| 36 | OUT EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 37 | );\r |
| 38 | \r |
| a8d0c20e |
39 | /**\r |
| 40 | Check if the CRC field in the Partition table header is valid\r |
| 41 | for Partition entry array.\r |
| 42 | \r |
| 43 | @param[in] BlockIo Parent BlockIo interface\r |
| 44 | @param[in] DiskIo Disk Io Protocol.\r |
| 45 | @param[in] PartHeader Partition table header structure\r |
| 46 | \r |
| 47 | @retval TRUE the CRC is valid\r |
| 48 | @retval FALSE the CRC is invalid\r |
| 49 | \r |
| 50 | **/\r |
| adbcbf8f |
51 | BOOLEAN\r |
| 52 | PartitionCheckGptEntryArrayCRC (\r |
| 53 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 54 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 55 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 56 | );\r |
| 57 | \r |
| 58 | \r |
| a8d0c20e |
59 | /**\r |
| 60 | Restore Partition Table to its alternate place\r |
| 490b5ea1 |
61 | (Primary -> Backup or Backup -> Primary).\r |
| a8d0c20e |
62 | \r |
| 490b5ea1 |
63 | @param[in] BlockIo Parent BlockIo interface.\r |
| a8d0c20e |
64 | @param[in] DiskIo Disk Io Protocol.\r |
| 490b5ea1 |
65 | @param[in] PartHeader Partition table header structure.\r |
| a8d0c20e |
66 | \r |
| 67 | @retval TRUE Restoring succeeds\r |
| 68 | @retval FALSE Restoring failed\r |
| 69 | \r |
| 70 | **/\r |
| adbcbf8f |
71 | BOOLEAN\r |
| 72 | PartitionRestoreGptTable (\r |
| 73 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 74 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 75 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 76 | );\r |
| 77 | \r |
| 78 | \r |
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79 | /**\r |
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80 | Restore Partition Table to its alternate place.\r |
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81 | (Primary -> Backup or Backup -> Primary)\r |
| 82 | \r |
| 83 | @param[in] PartHeader Partition table header structure\r |
| 84 | @param[in] PartEntry The partition entry array\r |
| 85 | @param[out] PEntryStatus the partition entry status array \r |
| 86 | recording the status of each partition\r |
| 87 | \r |
| 88 | **/\r |
| adbcbf8f |
89 | VOID\r |
| 90 | PartitionCheckGptEntry (\r |
| 91 | IN EFI_PARTITION_TABLE_HEADER *PartHeader,\r |
| 92 | IN EFI_PARTITION_ENTRY *PartEntry,\r |
| 93 | OUT EFI_PARTITION_ENTRY_STATUS *PEntryStatus\r |
| 94 | );\r |
| 95 | \r |
| 96 | \r |
| a8d0c20e |
97 | /**\r |
| ea7cb08c |
98 | Checks the CRC32 value in the table header.\r |
| a8d0c20e |
99 | \r |
| 100 | @param MaxSize Max Size limit\r |
| 101 | @param Size The size of the table\r |
| 102 | @param Hdr Table to check\r |
| 103 | \r |
| 104 | @return TRUE CRC Valid\r |
| 105 | @return FALSE CRC Invalid\r |
| 106 | \r |
| 107 | **/\r |
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108 | BOOLEAN\r |
| 109 | PartitionCheckCrcAltSize (\r |
| 110 | IN UINTN MaxSize,\r |
| 111 | IN UINTN Size,\r |
| 112 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 113 | );\r |
| 114 | \r |
| 115 | \r |
| a8d0c20e |
116 | /**\r |
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117 | Checks the CRC32 value in the table header.\r |
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118 | \r |
| 119 | @param MaxSize Max Size limit\r |
| 120 | @param Hdr Table to check\r |
| 121 | \r |
| 122 | @return TRUE CRC Valid\r |
| 123 | @return FALSE CRC Invalid\r |
| 124 | \r |
| 125 | **/\r |
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126 | BOOLEAN\r |
| 127 | PartitionCheckCrc (\r |
| 128 | IN UINTN MaxSize,\r |
| 129 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 130 | );\r |
| 131 | \r |
| 132 | \r |
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133 | /**\r |
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134 | Updates the CRC32 value in the table header.\r |
| a8d0c20e |
135 | \r |
| 136 | @param Size The size of the table\r |
| 137 | @param Hdr Table to update\r |
| 138 | \r |
| 139 | **/\r |
| adbcbf8f |
140 | VOID\r |
| 141 | PartitionSetCrcAltSize (\r |
| 142 | IN UINTN Size,\r |
| 143 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 144 | );\r |
| 145 | \r |
| 146 | \r |
| a8d0c20e |
147 | /**\r |
| ea7cb08c |
148 | Updates the CRC32 value in the table header.\r |
| a8d0c20e |
149 | \r |
| 150 | @param Hdr Table to update\r |
| 151 | \r |
| 152 | **/\r |
| adbcbf8f |
153 | VOID\r |
| 154 | PartitionSetCrc (\r |
| 155 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 156 | );\r |
| 157 | \r |
| 158 | /**\r |
| 159 | Install child handles if the Handle supports GPT partition structure.\r |
| 160 | \r |
| 490b5ea1 |
161 | @param[in] This Calling context.\r |
| 162 | @param[in] Handle Parent Handle.\r |
| 163 | @param[in] DiskIo Parent DiskIo interface.\r |
| 164 | @param[in] BlockIo Parent BlockIo interface.\r |
| 165 | @param[in] BlockIo2 Parent BlockIo2 interface.\r |
| 166 | @param[in] DevicePath Parent Device Path.\r |
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167 | \r |
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168 | @retval EFI_SUCCESS Valid GPT disk.\r |
| 169 | @retval EFI_MEDIA_CHANGED Media changed Detected.\r |
| 170 | @retval other Not a valid GPT disk.\r |
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171 | \r |
| 172 | **/\r |
| 173 | EFI_STATUS\r |
| 174 | PartitionInstallGptChildHandles (\r |
| 175 | IN EFI_DRIVER_BINDING_PROTOCOL *This,\r |
| 176 | IN EFI_HANDLE Handle,\r |
| 177 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 178 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 490b5ea1 |
179 | IN EFI_BLOCK_IO2_PROTOCOL *BlockIo2,\r |
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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 |
| 490b5ea1 |
194 | UINT32 MediaId;\r |
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195 | \r |
| 196 | ProtectiveMbr = NULL;\r |
| 197 | PrimaryHeader = NULL;\r |
| 198 | BackupHeader = NULL;\r |
| 199 | PartEntry = NULL;\r |
| 200 | PEntryStatus = NULL;\r |
| 201 | \r |
| 202 | BlockSize = BlockIo->Media->BlockSize;\r |
| 203 | LastBlock = BlockIo->Media->LastBlock;\r |
| 490b5ea1 |
204 | MediaId = BlockIo->Media->MediaId;\r |
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205 | \r |
| 206 | DEBUG ((EFI_D_INFO, " BlockSize : %d \n", BlockSize));\r |
| 7df7393f |
207 | DEBUG ((EFI_D_INFO, " LastBlock : %lx \n", LastBlock));\r |
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208 | \r |
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209 | GptValidStatus = EFI_NOT_FOUND;\r |
| adbcbf8f |
210 | \r |
| 211 | //\r |
| 212 | // Allocate a buffer for the Protective MBR\r |
| 213 | //\r |
| 214 | ProtectiveMbr = AllocatePool (BlockSize);\r |
| 215 | if (ProtectiveMbr == NULL) {\r |
| 216 | return EFI_NOT_FOUND;\r |
| 217 | }\r |
| 218 | \r |
| 219 | //\r |
| 220 | // Read the Protective MBR from LBA #0\r |
| 221 | //\r |
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222 | Status = DiskIo->ReadDisk (\r |
| 223 | DiskIo,\r |
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224 | MediaId,\r |
| 96f99e1d |
225 | 0,\r |
| 490b5ea1 |
226 | BlockSize,\r |
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227 | ProtectiveMbr\r |
| 228 | );\r |
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229 | if (EFI_ERROR (Status)) {\r |
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230 | GptValidStatus = Status;\r |
| adbcbf8f |
231 | goto Done;\r |
| 232 | }\r |
| 490b5ea1 |
233 | \r |
| adbcbf8f |
234 | //\r |
| 235 | // Verify that the Protective MBR is valid\r |
| 236 | //\r |
| 339c754a |
237 | for (Index = 0; Index < MAX_MBR_PARTITIONS; Index++) {\r |
| 238 | if (ProtectiveMbr->Partition[Index].BootIndicator == 0x00 &&\r |
| 239 | ProtectiveMbr->Partition[Index].OSIndicator == PMBR_GPT_PARTITION &&\r |
| 240 | UNPACK_UINT32 (ProtectiveMbr->Partition[Index].StartingLBA) == 1\r |
| 241 | ) {\r |
| 242 | break;\r |
| 243 | }\r |
| 244 | }\r |
| 245 | if (Index == MAX_MBR_PARTITIONS) {\r |
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246 | goto Done;\r |
| 247 | }\r |
| 248 | \r |
| 249 | //\r |
| 250 | // Allocate the GPT structures\r |
| 251 | //\r |
| 252 | PrimaryHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));\r |
| 253 | if (PrimaryHeader == NULL) {\r |
| 254 | goto Done;\r |
| 255 | }\r |
| 256 | \r |
| 257 | BackupHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));\r |
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258 | if (BackupHeader == NULL) {\r |
| 259 | goto Done;\r |
| 260 | }\r |
| 261 | \r |
| 262 | //\r |
| 263 | // Check primary and backup partition tables\r |
| 264 | //\r |
| 265 | if (!PartitionValidGptTable (BlockIo, DiskIo, PRIMARY_PART_HEADER_LBA, PrimaryHeader)) {\r |
| 266 | DEBUG ((EFI_D_INFO, " Not Valid primary partition table\n"));\r |
| 267 | \r |
| 268 | if (!PartitionValidGptTable (BlockIo, DiskIo, LastBlock, BackupHeader)) {\r |
| 269 | DEBUG ((EFI_D_INFO, " Not Valid backup partition table\n"));\r |
| 270 | goto Done;\r |
| 271 | } else {\r |
| 272 | DEBUG ((EFI_D_INFO, " Valid backup partition table\n"));\r |
| 273 | DEBUG ((EFI_D_INFO, " Restore primary partition table by the backup\n"));\r |
| 274 | if (!PartitionRestoreGptTable (BlockIo, DiskIo, BackupHeader)) {\r |
| 275 | DEBUG ((EFI_D_INFO, " Restore primary partition table error\n"));\r |
| 276 | }\r |
| 277 | \r |
| 278 | if (PartitionValidGptTable (BlockIo, DiskIo, BackupHeader->AlternateLBA, PrimaryHeader)) {\r |
| 279 | DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));\r |
| 280 | }\r |
| 281 | }\r |
| 282 | } else if (!PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {\r |
| 283 | DEBUG ((EFI_D_INFO, " Valid primary and !Valid backup partition table\n"));\r |
| 284 | DEBUG ((EFI_D_INFO, " Restore backup partition table by the primary\n"));\r |
| 285 | if (!PartitionRestoreGptTable (BlockIo, DiskIo, PrimaryHeader)) {\r |
| 286 | DEBUG ((EFI_D_INFO, " Restore backup partition table error\n"));\r |
| 287 | }\r |
| 288 | \r |
| 289 | if (PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {\r |
| 290 | DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));\r |
| 291 | }\r |
| 292 | \r |
| 293 | }\r |
| 294 | \r |
| 295 | DEBUG ((EFI_D_INFO, " Valid primary and Valid backup partition table\n"));\r |
| 296 | \r |
| 297 | //\r |
| 298 | // Read the EFI Partition Entries\r |
| 299 | //\r |
| 300 | PartEntry = AllocatePool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY));\r |
| 301 | if (PartEntry == NULL) {\r |
| 302 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r |
| 303 | goto Done;\r |
| 304 | }\r |
| 305 | \r |
| 306 | Status = DiskIo->ReadDisk (\r |
| 7059dad9 |
307 | DiskIo,\r |
| 490b5ea1 |
308 | MediaId,\r |
| 7059dad9 |
309 | MultU64x32(PrimaryHeader->PartitionEntryLBA, BlockSize),\r |
| 310 | PrimaryHeader->NumberOfPartitionEntries * (PrimaryHeader->SizeOfPartitionEntry),\r |
| 311 | PartEntry\r |
| 312 | );\r |
| adbcbf8f |
313 | if (EFI_ERROR (Status)) {\r |
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314 | GptValidStatus = Status;\r |
| 96f99e1d |
315 | DEBUG ((EFI_D_ERROR, " Partition Entry ReadDisk error\n"));\r |
| adbcbf8f |
316 | goto Done;\r |
| 317 | }\r |
| 318 | \r |
| 319 | DEBUG ((EFI_D_INFO, " Partition entries read block success\n"));\r |
| 320 | \r |
| 321 | DEBUG ((EFI_D_INFO, " Number of partition entries: %d\n", PrimaryHeader->NumberOfPartitionEntries));\r |
| 322 | \r |
| 323 | PEntryStatus = AllocateZeroPool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY_STATUS));\r |
| 324 | if (PEntryStatus == NULL) {\r |
| 325 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r |
| 326 | goto Done;\r |
| 327 | }\r |
| 328 | \r |
| 329 | //\r |
| 330 | // Check the integrity of partition entries\r |
| 331 | //\r |
| 332 | PartitionCheckGptEntry (PrimaryHeader, PartEntry, PEntryStatus);\r |
| 333 | \r |
| 334 | //\r |
| 335 | // If we got this far the GPT layout of the disk is valid and we should return true\r |
| 336 | //\r |
| ff61847d |
337 | GptValidStatus = EFI_SUCCESS;\r |
| adbcbf8f |
338 | \r |
| 339 | //\r |
| 340 | // Create child device handles\r |
| 341 | //\r |
| 342 | for (Index = 0; Index < PrimaryHeader->NumberOfPartitionEntries; Index++) {\r |
| 343 | if (CompareGuid (&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeUnusedGuid) ||\r |
| 344 | PEntryStatus[Index].OutOfRange ||\r |
| 47e1a80b |
345 | PEntryStatus[Index].Overlap ||\r |
| 346 | PEntryStatus[Index].OsSpecific\r |
| adbcbf8f |
347 | ) {\r |
| 348 | //\r |
| 47e1a80b |
349 | // Don't use null EFI Partition Entries, Invalid Partition Entries or OS specific\r |
| 350 | // partition Entries\r |
| adbcbf8f |
351 | //\r |
| 352 | continue;\r |
| 353 | }\r |
| 354 | \r |
| 355 | ZeroMem (&HdDev, sizeof (HdDev));\r |
| 356 | HdDev.Header.Type = MEDIA_DEVICE_PATH;\r |
| 357 | HdDev.Header.SubType = MEDIA_HARDDRIVE_DP;\r |
| 358 | SetDevicePathNodeLength (&HdDev.Header, sizeof (HdDev));\r |
| 359 | \r |
| 360 | HdDev.PartitionNumber = (UINT32) Index + 1;\r |
| 361 | HdDev.MBRType = MBR_TYPE_EFI_PARTITION_TABLE_HEADER;\r |
| 362 | HdDev.SignatureType = SIGNATURE_TYPE_GUID;\r |
| 363 | HdDev.PartitionStart = PartEntry[Index].StartingLBA;\r |
| 364 | HdDev.PartitionSize = PartEntry[Index].EndingLBA - PartEntry[Index].StartingLBA + 1;\r |
| 365 | CopyMem (HdDev.Signature, &PartEntry[Index].UniquePartitionGUID, sizeof (EFI_GUID));\r |
| 366 | \r |
| ff61847d |
367 | DEBUG ((EFI_D_INFO, " Index : %d\n", (UINT32) Index));\r |
| 368 | DEBUG ((EFI_D_INFO, " Start LBA : %lx\n", (UINT64) HdDev.PartitionStart));\r |
| 369 | DEBUG ((EFI_D_INFO, " End LBA : %lx\n", (UINT64) PartEntry[Index].EndingLBA));\r |
| 370 | DEBUG ((EFI_D_INFO, " Partition size: %lx\n", (UINT64) HdDev.PartitionSize));\r |
| 371 | DEBUG ((EFI_D_INFO, " Start : %lx", MultU64x32 (PartEntry[Index].StartingLBA, BlockSize)));\r |
| 372 | DEBUG ((EFI_D_INFO, " End : %lx\n", MultU64x32 (PartEntry[Index].EndingLBA, BlockSize)));\r |
| adbcbf8f |
373 | \r |
| 374 | Status = PartitionInstallChildHandle (\r |
| 490b5ea1 |
375 | This,\r |
| 376 | Handle,\r |
| 377 | DiskIo,\r |
| 378 | BlockIo,\r |
| 379 | BlockIo2,\r |
| 380 | DevicePath,\r |
| 381 | (EFI_DEVICE_PATH_PROTOCOL *) &HdDev,\r |
| 382 | PartEntry[Index].StartingLBA,\r |
| 383 | PartEntry[Index].EndingLBA,\r |
| 384 | BlockSize,\r |
| 385 | CompareGuid(&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeSystemPartGuid)\r |
| 386 | );\r |
| adbcbf8f |
387 | }\r |
| 388 | \r |
| 389 | DEBUG ((EFI_D_INFO, "Prepare to Free Pool\n"));\r |
| 390 | \r |
| 391 | Done:\r |
| 392 | if (ProtectiveMbr != NULL) {\r |
| 393 | FreePool (ProtectiveMbr);\r |
| 394 | }\r |
| 395 | if (PrimaryHeader != NULL) {\r |
| 396 | FreePool (PrimaryHeader);\r |
| 397 | }\r |
| 398 | if (BackupHeader != NULL) {\r |
| 399 | FreePool (BackupHeader);\r |
| 400 | }\r |
| 401 | if (PartEntry != NULL) {\r |
| 402 | FreePool (PartEntry);\r |
| 403 | }\r |
| 404 | if (PEntryStatus != NULL) {\r |
| 405 | FreePool (PEntryStatus);\r |
| 406 | }\r |
| 407 | \r |
| ff61847d |
408 | return GptValidStatus;\r |
| adbcbf8f |
409 | }\r |
| 410 | \r |
| adbcbf8f |
411 | /**\r |
| 412 | Install child handles if the Handle supports GPT partition structure.\r |
| 413 | \r |
| 490b5ea1 |
414 | @param[in] BlockIo Parent BlockIo interface.\r |
| adbcbf8f |
415 | @param[in] DiskIo Disk Io protocol.\r |
| 416 | @param[in] Lba The starting Lba of the Partition Table\r |
| a8d0c20e |
417 | @param[out] PartHeader Stores the partition table that is read\r |
| adbcbf8f |
418 | \r |
| 419 | @retval TRUE The partition table is valid\r |
| 420 | @retval FALSE The partition table is not valid\r |
| 421 | \r |
| 422 | **/\r |
| 423 | BOOLEAN\r |
| 424 | PartitionValidGptTable (\r |
| 425 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 426 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 427 | IN EFI_LBA Lba,\r |
| 428 | OUT EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 429 | )\r |
| 430 | {\r |
| 431 | EFI_STATUS Status;\r |
| 432 | UINT32 BlockSize;\r |
| 433 | EFI_PARTITION_TABLE_HEADER *PartHdr;\r |
| 490b5ea1 |
434 | UINT32 MediaId;\r |
| adbcbf8f |
435 | \r |
| 436 | BlockSize = BlockIo->Media->BlockSize;\r |
| 490b5ea1 |
437 | MediaId = BlockIo->Media->MediaId;\r |
| adbcbf8f |
438 | PartHdr = AllocateZeroPool (BlockSize);\r |
| 439 | \r |
| 440 | if (PartHdr == NULL) {\r |
| 441 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r |
| 442 | return FALSE;\r |
| 443 | }\r |
| 444 | //\r |
| 445 | // Read the EFI Partition Table Header\r |
| 446 | //\r |
| 96f99e1d |
447 | Status = DiskIo->ReadDisk (\r |
| 448 | DiskIo,\r |
| 490b5ea1 |
449 | MediaId,\r |
| 7059dad9 |
450 | MultU64x32 (Lba, BlockSize),\r |
| 96f99e1d |
451 | BlockSize,\r |
| 452 | PartHdr\r |
| 453 | );\r |
| adbcbf8f |
454 | if (EFI_ERROR (Status)) {\r |
| 455 | FreePool (PartHdr);\r |
| 456 | return FALSE;\r |
| 457 | }\r |
| 458 | \r |
| cd2d8468 |
459 | if ((PartHdr->Header.Signature != EFI_PTAB_HEADER_ID) ||\r |
| adbcbf8f |
460 | !PartitionCheckCrc (BlockSize, &PartHdr->Header) ||\r |
| 461 | PartHdr->MyLBA != Lba\r |
| 462 | ) {\r |
| ff61847d |
463 | DEBUG ((EFI_D_INFO, "Invalid efi partition table header\n"));\r |
| adbcbf8f |
464 | FreePool (PartHdr);\r |
| 465 | return FALSE;\r |
| 466 | }\r |
| 467 | \r |
| 468 | CopyMem (PartHeader, PartHdr, sizeof (EFI_PARTITION_TABLE_HEADER));\r |
| 469 | if (!PartitionCheckGptEntryArrayCRC (BlockIo, DiskIo, PartHeader)) {\r |
| 470 | FreePool (PartHdr);\r |
| 471 | return FALSE;\r |
| 472 | }\r |
| 473 | \r |
| 474 | DEBUG ((EFI_D_INFO, " Valid efi partition table header\n"));\r |
| 475 | FreePool (PartHdr);\r |
| 476 | return TRUE;\r |
| 477 | }\r |
| 478 | \r |
| adbcbf8f |
479 | /**\r |
| 480 | Check if the CRC field in the Partition table header is valid\r |
| 481 | for Partition entry array.\r |
| 482 | \r |
| 483 | @param[in] BlockIo Parent BlockIo interface\r |
| 484 | @param[in] DiskIo Disk Io Protocol.\r |
| 485 | @param[in] PartHeader Partition table header structure\r |
| 486 | \r |
| 487 | @retval TRUE the CRC is valid\r |
| 488 | @retval FALSE the CRC is invalid\r |
| 489 | \r |
| 490 | **/\r |
| 491 | BOOLEAN\r |
| 492 | PartitionCheckGptEntryArrayCRC (\r |
| 493 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 494 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 495 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 496 | )\r |
| 497 | {\r |
| 498 | EFI_STATUS Status;\r |
| 499 | UINT8 *Ptr;\r |
| 500 | UINT32 Crc;\r |
| 501 | UINTN Size;\r |
| 502 | \r |
| 503 | //\r |
| 504 | // Read the EFI Partition Entries\r |
| 505 | //\r |
| 506 | Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);\r |
| 507 | if (Ptr == NULL) {\r |
| 508 | DEBUG ((EFI_D_ERROR, " Allocate pool error\n"));\r |
| 509 | return FALSE;\r |
| 510 | }\r |
| 511 | \r |
| 512 | Status = DiskIo->ReadDisk (\r |
| 513 | DiskIo,\r |
| 514 | BlockIo->Media->MediaId,\r |
| 515 | MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),\r |
| 516 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r |
| 517 | Ptr\r |
| 518 | );\r |
| 519 | if (EFI_ERROR (Status)) {\r |
| 520 | FreePool (Ptr);\r |
| 521 | return FALSE;\r |
| 522 | }\r |
| 523 | \r |
| 524 | Size = PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry;\r |
| 525 | \r |
| 526 | Status = gBS->CalculateCrc32 (Ptr, Size, &Crc);\r |
| 527 | if (EFI_ERROR (Status)) {\r |
| 528 | DEBUG ((EFI_D_ERROR, "CheckPEntryArrayCRC: Crc calculation failed\n"));\r |
| 529 | FreePool (Ptr);\r |
| 530 | return FALSE;\r |
| 531 | }\r |
| 532 | \r |
| 533 | FreePool (Ptr);\r |
| 534 | \r |
| 535 | return (BOOLEAN) (PartHeader->PartitionEntryArrayCRC32 == Crc);\r |
| 536 | }\r |
| 537 | \r |
| 538 | \r |
| 539 | /**\r |
| 540 | Restore Partition Table to its alternate place\r |
| 490b5ea1 |
541 | (Primary -> Backup or Backup -> Primary).\r |
| adbcbf8f |
542 | \r |
| 490b5ea1 |
543 | @param[in] BlockIo Parent BlockIo interface.\r |
| adbcbf8f |
544 | @param[in] DiskIo Disk Io Protocol.\r |
| 490b5ea1 |
545 | @param[in] PartHeader Partition table header structure.\r |
| adbcbf8f |
546 | \r |
| 547 | @retval TRUE Restoring succeeds\r |
| 548 | @retval FALSE Restoring failed\r |
| 549 | \r |
| 550 | **/\r |
| 551 | BOOLEAN\r |
| 552 | PartitionRestoreGptTable (\r |
| 553 | IN EFI_BLOCK_IO_PROTOCOL *BlockIo,\r |
| 554 | IN EFI_DISK_IO_PROTOCOL *DiskIo,\r |
| 555 | IN EFI_PARTITION_TABLE_HEADER *PartHeader\r |
| 556 | )\r |
| 557 | {\r |
| 558 | EFI_STATUS Status;\r |
| 559 | UINTN BlockSize;\r |
| 560 | EFI_PARTITION_TABLE_HEADER *PartHdr;\r |
| 561 | EFI_LBA PEntryLBA;\r |
| 562 | UINT8 *Ptr;\r |
| 490b5ea1 |
563 | UINT32 MediaId;\r |
| adbcbf8f |
564 | \r |
| 565 | PartHdr = NULL;\r |
| 566 | Ptr = NULL;\r |
| 567 | \r |
| 568 | BlockSize = BlockIo->Media->BlockSize;\r |
| 490b5ea1 |
569 | MediaId = BlockIo->Media->MediaId;\r |
| adbcbf8f |
570 | \r |
| 571 | PartHdr = AllocateZeroPool (BlockSize);\r |
| 572 | \r |
| 573 | if (PartHdr == NULL) {\r |
| 574 | DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));\r |
| 575 | return FALSE;\r |
| 576 | }\r |
| 577 | \r |
| 578 | PEntryLBA = (PartHeader->MyLBA == PRIMARY_PART_HEADER_LBA) ? \\r |
| 579 | (PartHeader->LastUsableLBA + 1) : \\r |
| 580 | (PRIMARY_PART_HEADER_LBA + 1);\r |
| 581 | \r |
| 582 | CopyMem (PartHdr, PartHeader, sizeof (EFI_PARTITION_TABLE_HEADER));\r |
| 583 | \r |
| 584 | PartHdr->MyLBA = PartHeader->AlternateLBA;\r |
| 585 | PartHdr->AlternateLBA = PartHeader->MyLBA;\r |
| 586 | PartHdr->PartitionEntryLBA = PEntryLBA;\r |
| 587 | PartitionSetCrc ((EFI_TABLE_HEADER *) PartHdr);\r |
| 588 | \r |
| 071b7221 |
589 | Status = DiskIo->WriteDisk (\r |
| 590 | DiskIo,\r |
| 490b5ea1 |
591 | MediaId,\r |
| 592 | MultU64x32 (PartHdr->MyLBA, (UINT32) BlockSize),\r |
| 071b7221 |
593 | BlockSize,\r |
| 594 | PartHdr\r |
| 595 | );\r |
| adbcbf8f |
596 | if (EFI_ERROR (Status)) {\r |
| 597 | goto Done;\r |
| 598 | }\r |
| 599 | \r |
| 600 | Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);\r |
| 601 | if (Ptr == NULL) {\r |
| 071b7221 |
602 | DEBUG ((EFI_D_ERROR, " Allocate pool error\n"));\r |
| adbcbf8f |
603 | Status = EFI_OUT_OF_RESOURCES;\r |
| 604 | goto Done;\r |
| 605 | }\r |
| 606 | \r |
| 607 | Status = DiskIo->ReadDisk (\r |
| 608 | DiskIo,\r |
| 490b5ea1 |
609 | MediaId,\r |
| 610 | MultU64x32(PartHeader->PartitionEntryLBA, (UINT32) BlockSize),\r |
| adbcbf8f |
611 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r |
| 612 | Ptr\r |
| 613 | );\r |
| 614 | if (EFI_ERROR (Status)) {\r |
| 615 | goto Done;\r |
| 616 | }\r |
| 617 | \r |
| 618 | Status = DiskIo->WriteDisk (\r |
| 619 | DiskIo,\r |
| 490b5ea1 |
620 | MediaId,\r |
| 621 | MultU64x32(PEntryLBA, (UINT32) BlockSize),\r |
| adbcbf8f |
622 | PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,\r |
| 623 | Ptr\r |
| 624 | );\r |
| 625 | \r |
| 626 | Done:\r |
| 627 | FreePool (PartHdr);\r |
| ff61847d |
628 | \r |
| 629 | if (Ptr != NULL) {\r |
| 630 | FreePool (Ptr);\r |
| 631 | }\r |
| adbcbf8f |
632 | \r |
| 633 | if (EFI_ERROR (Status)) {\r |
| 634 | return FALSE;\r |
| 635 | }\r |
| 636 | \r |
| 637 | return TRUE;\r |
| 638 | }\r |
| 639 | \r |
| 640 | \r |
| 641 | /**\r |
| ea7cb08c |
642 | Restore Partition Table to its alternate place.\r |
| adbcbf8f |
643 | (Primary -> Backup or Backup -> Primary)\r |
| 644 | \r |
| 645 | @param[in] PartHeader Partition table header structure\r |
| 646 | @param[in] PartEntry The partition entry array\r |
| 647 | @param[out] PEntryStatus the partition entry status array \r |
| 648 | recording the status of each partition\r |
| a8d0c20e |
649 | \r |
| adbcbf8f |
650 | **/\r |
| 651 | VOID\r |
| 652 | PartitionCheckGptEntry (\r |
| 653 | IN EFI_PARTITION_TABLE_HEADER *PartHeader,\r |
| 654 | IN EFI_PARTITION_ENTRY *PartEntry,\r |
| 655 | OUT EFI_PARTITION_ENTRY_STATUS *PEntryStatus\r |
| 656 | )\r |
| 657 | {\r |
| 658 | EFI_LBA StartingLBA;\r |
| 659 | EFI_LBA EndingLBA;\r |
| 660 | UINTN Index1;\r |
| 661 | UINTN Index2;\r |
| 47e1a80b |
662 | UINT64 Attributes;\r |
| adbcbf8f |
663 | \r |
| 664 | DEBUG ((EFI_D_INFO, " start check partition entries\n"));\r |
| 665 | for (Index1 = 0; Index1 < PartHeader->NumberOfPartitionEntries; Index1++) {\r |
| 666 | if (CompareGuid (&PartEntry[Index1].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {\r |
| 667 | continue;\r |
| 668 | }\r |
| 669 | \r |
| 670 | StartingLBA = PartEntry[Index1].StartingLBA;\r |
| 671 | EndingLBA = PartEntry[Index1].EndingLBA;\r |
| 672 | if (StartingLBA > EndingLBA ||\r |
| 673 | StartingLBA < PartHeader->FirstUsableLBA ||\r |
| 674 | StartingLBA > PartHeader->LastUsableLBA ||\r |
| 675 | EndingLBA < PartHeader->FirstUsableLBA ||\r |
| 676 | EndingLBA > PartHeader->LastUsableLBA\r |
| 677 | ) {\r |
| 678 | PEntryStatus[Index1].OutOfRange = TRUE;\r |
| 679 | continue;\r |
| 680 | }\r |
| 681 | \r |
| 682 | for (Index2 = Index1 + 1; Index2 < PartHeader->NumberOfPartitionEntries; Index2++) {\r |
| 683 | \r |
| 684 | if (CompareGuid (&PartEntry[Index2].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {\r |
| 685 | continue;\r |
| 686 | }\r |
| 687 | \r |
| 688 | if (PartEntry[Index2].EndingLBA >= StartingLBA && PartEntry[Index2].StartingLBA <= EndingLBA) {\r |
| 689 | //\r |
| 690 | // This region overlaps with the Index1'th region\r |
| 691 | //\r |
| 692 | PEntryStatus[Index1].Overlap = TRUE;\r |
| 693 | PEntryStatus[Index2].Overlap = TRUE;\r |
| 694 | continue;\r |
| 695 | \r |
| 696 | }\r |
| 697 | }\r |
| 47e1a80b |
698 | \r |
| 699 | Attributes = PartEntry[Index1].Attributes;\r |
| 700 | if ((Attributes & BIT1) != 0) {\r |
| 701 | //\r |
| 702 | // If Bit 1 is set, this indicate that this is an OS specific GUID partition. \r |
| 703 | //\r |
| 704 | PEntryStatus[Index1].OsSpecific = TRUE;\r |
| 705 | }\r |
| adbcbf8f |
706 | }\r |
| 707 | \r |
| 708 | DEBUG ((EFI_D_INFO, " End check partition entries\n"));\r |
| 709 | }\r |
| 710 | \r |
| 711 | \r |
| 712 | /**\r |
| ea7cb08c |
713 | Updates the CRC32 value in the table header.\r |
| adbcbf8f |
714 | \r |
| a8d0c20e |
715 | @param Hdr Table to update\r |
| adbcbf8f |
716 | \r |
| 717 | **/\r |
| 718 | VOID\r |
| 719 | PartitionSetCrc (\r |
| 720 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 721 | )\r |
| 722 | {\r |
| 723 | PartitionSetCrcAltSize (Hdr->HeaderSize, Hdr);\r |
| 724 | }\r |
| 725 | \r |
| 726 | \r |
| 727 | /**\r |
| ea7cb08c |
728 | Updates the CRC32 value in the table header.\r |
| adbcbf8f |
729 | \r |
| a8d0c20e |
730 | @param Size The size of the table\r |
| 731 | @param Hdr Table to update\r |
| adbcbf8f |
732 | \r |
| 733 | **/\r |
| 734 | VOID\r |
| 735 | PartitionSetCrcAltSize (\r |
| 736 | IN UINTN Size,\r |
| 737 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 738 | )\r |
| adbcbf8f |
739 | {\r |
| 740 | UINT32 Crc;\r |
| 741 | \r |
| 742 | Hdr->CRC32 = 0;\r |
| 743 | gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);\r |
| 744 | Hdr->CRC32 = Crc;\r |
| 745 | }\r |
| 746 | \r |
| 747 | \r |
| 748 | /**\r |
| ea7cb08c |
749 | Checks the CRC32 value in the table header.\r |
| adbcbf8f |
750 | \r |
| a8d0c20e |
751 | @param MaxSize Max Size limit\r |
| 752 | @param Hdr Table to check\r |
| adbcbf8f |
753 | \r |
| a8d0c20e |
754 | @return TRUE CRC Valid\r |
| 755 | @return FALSE CRC Invalid\r |
| adbcbf8f |
756 | \r |
| 757 | **/\r |
| 758 | BOOLEAN\r |
| 759 | PartitionCheckCrc (\r |
| 760 | IN UINTN MaxSize,\r |
| 761 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 762 | )\r |
| 763 | {\r |
| 764 | return PartitionCheckCrcAltSize (MaxSize, Hdr->HeaderSize, Hdr);\r |
| 765 | }\r |
| 766 | \r |
| 767 | \r |
| 768 | /**\r |
| ea7cb08c |
769 | Checks the CRC32 value in the table header.\r |
| adbcbf8f |
770 | \r |
| a8d0c20e |
771 | @param MaxSize Max Size limit\r |
| 772 | @param Size The size of the table\r |
| 773 | @param Hdr Table to check\r |
| adbcbf8f |
774 | \r |
| 775 | @return TRUE CRC Valid\r |
| 776 | @return FALSE CRC Invalid\r |
| 777 | \r |
| 778 | **/\r |
| 779 | BOOLEAN\r |
| 780 | PartitionCheckCrcAltSize (\r |
| 781 | IN UINTN MaxSize,\r |
| 782 | IN UINTN Size,\r |
| 783 | IN OUT EFI_TABLE_HEADER *Hdr\r |
| 784 | )\r |
| 785 | {\r |
| 786 | UINT32 Crc;\r |
| 787 | UINT32 OrgCrc;\r |
| 788 | EFI_STATUS Status;\r |
| 789 | \r |
| 790 | Crc = 0;\r |
| 791 | \r |
| 792 | if (Size == 0) {\r |
| 793 | //\r |
| 794 | // If header size is 0 CRC will pass so return FALSE here\r |
| 795 | //\r |
| 796 | return FALSE;\r |
| 797 | }\r |
| 798 | \r |
| ea7cb08c |
799 | if ((MaxSize != 0) && (Size > MaxSize)) {\r |
| adbcbf8f |
800 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Size > MaxSize\n"));\r |
| 801 | return FALSE;\r |
| 802 | }\r |
| 803 | //\r |
| 804 | // clear old crc from header\r |
| 805 | //\r |
| 806 | OrgCrc = Hdr->CRC32;\r |
| 807 | Hdr->CRC32 = 0;\r |
| 808 | \r |
| 809 | Status = gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);\r |
| 810 | if (EFI_ERROR (Status)) {\r |
| 811 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc calculation failed\n"));\r |
| 812 | return FALSE;\r |
| 813 | }\r |
| 814 | //\r |
| 815 | // set results\r |
| 816 | //\r |
| 817 | Hdr->CRC32 = Crc;\r |
| 818 | \r |
| 819 | //\r |
| 820 | // return status\r |
| 821 | //\r |
| 822 | DEBUG_CODE_BEGIN ();\r |
| 823 | if (OrgCrc != Crc) {\r |
| 824 | DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc check failed\n"));\r |
| 825 | }\r |
| 826 | DEBUG_CODE_END ();\r |
| 827 | \r |
| 828 | return (BOOLEAN) (OrgCrc == Crc);\r |
| 829 | }\r |
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