ntoskrnl/io/xhaldrv.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            ntoskrnl/io/xhaldrv.c
   6  * PURPOSE:         Hal drive routines
   7  * PROGRAMMER:      Eric Kohl (ekohl@rz-online.de)
   8  * UPDATE HISTORY:
   9  *                  Created 19/06/2000
  10  */
  11
  12 /* INCLUDES *****************************************************************/
  13
  14 #include <ddk/ntddk.h>
  15 #include <internal/xhal.h>
  16
  17 #define NDEBUG
  18 #include <internal/debug.h>
  19
  20 /* LOCAL MACROS and TYPES ***************************************************/
  21
  22 #define  AUTO_DRIVE         ((ULONG)-1)
  23
  24 #define  PARTITION_MAGIC    0xaa55
  25 #define  PART_MAGIC_OFFSET  0x01fe
  26 #define  PARTITION_OFFSET   0x01be
  27 #define  SIGNATURE_OFFSET   0x01b8
  28 #define  PARTITION_TBL_SIZE 4
  29
  30
  31 typedef struct _PARTITION
  32 {
  33   unsigned char   BootFlags;
  34   unsigned char   StartingHead;
  35   unsigned char   StartingSector;
  36   unsigned char   StartingCylinder;
  37   unsigned char   PartitionType;
  38   unsigned char   EndingHead;
  39   unsigned char   EndingSector;
  40   unsigned char   EndingCylinder;
  41   unsigned int  StartingBlock;
  42   unsigned int  SectorCount;
  43 } PARTITION, *PPARTITION;
  44
  45 typedef struct _PARTITION_TABLE
  46 {
  47   PARTITION Partition[PARTITION_TBL_SIZE];
  48   unsigned short Magic;
  49 } PARTITION_TABLE, *PPARTITION_TABLE;
  50
  51 /* FUNCTIONS *****************************************************************/
  52
  53 NTSTATUS
  54 xHalQueryDriveLayout(IN PUNICODE_STRING DeviceName,
  55                      OUT PDRIVE_LAYOUT_INFORMATION *LayoutInfo)
  56 {
  57   IO_STATUS_BLOCK StatusBlock;
  58   DISK_GEOMETRY DiskGeometry;
  59   PDEVICE_OBJECT DeviceObject = NULL;
  60   PFILE_OBJECT FileObject;
  61   KEVENT Event;
  62   PIRP Irp;
  63   NTSTATUS Status;
  64
  65   DPRINT("xHalpQueryDriveLayout %wZ %p\n",
  66          DeviceName,
  67          LayoutInfo);
  68
  69   /* Get the drives sector size */
  70   Status = IoGetDeviceObjectPointer(DeviceName,
  71                                     FILE_READ_DATA,
  72                                     &FileObject,
  73                                     &DeviceObject);
  74   if (!NT_SUCCESS(Status))
  75     {
  76       DPRINT("Status %x\n",Status);
  77       return(Status);
  78     }
  79
  80   KeInitializeEvent(&Event,
  81                     NotificationEvent,
  82                     FALSE);
  83
  84   Irp = IoBuildDeviceIoControlRequest(IOCTL_DISK_GET_DRIVE_GEOMETRY,
  85                                       DeviceObject,
  86                                       NULL,
  87                                       0,
  88                                       &DiskGeometry,
  89                                       sizeof(DISK_GEOMETRY),
  90                                       FALSE,
  91                                       &Event,
  92                                       &StatusBlock);
  93   if (Irp == NULL)
  94     {
  95       ObDereferenceObject(FileObject);
  96       return(STATUS_INSUFFICIENT_RESOURCES);
  97     }
  98
  99   Status = IoCallDriver(DeviceObject,
 100                         Irp);
 101   if (Status == STATUS_PENDING)
 102     {
 103       KeWaitForSingleObject(&Event,
 104                             Executive,
 105                             KernelMode,
 106                             FALSE,
 107                             NULL);
 108       Status = StatusBlock.Status;
 109     }
 110   if (!NT_SUCCESS(Status))
 111     {
 112       if (DeviceObject->Characteristics & FILE_REMOVABLE_MEDIA)
 113         {
 114           DiskGeometry.BytesPerSector = 512;
 115         }
 116       else
 117         {
 118           ObDereferenceObject(FileObject);
 119           return(Status);
 120         }
 121     }
 122
 123   DPRINT("DiskGeometry.BytesPerSector: %d\n",
 124          DiskGeometry.BytesPerSector);
 125
 126   /* read the partition table */
 127   Status = IoReadPartitionTable(DeviceObject,
 128                                 DiskGeometry.BytesPerSector,
 129                                 FALSE,
 130                                 LayoutInfo);
 131
 132   if ((!NT_SUCCESS(Status) || (*LayoutInfo)->PartitionCount == 0) &&
 133       DeviceObject->Characteristics & FILE_REMOVABLE_MEDIA)
 134     {
 135       PDRIVE_LAYOUT_INFORMATION Buffer;
 136
 137       if (NT_SUCCESS(Status))
 138         {
 139           ExFreePool(*LayoutInfo);
 140         }
 141
 142       /* Allocate a partition list for a single entry. */
 143       Buffer = ExAllocatePool(NonPagedPool,
 144                               sizeof(DRIVE_LAYOUT_INFORMATION));
 145       if (Buffer != NULL)
 146         {
 147           RtlZeroMemory(Buffer,
 148                         sizeof(DRIVE_LAYOUT_INFORMATION));
 149           Buffer->PartitionCount = 1;
 150           *LayoutInfo = Buffer;
 151
 152           Status = STATUS_SUCCESS;
 153         }
 154     }
 155
 156   ObDereferenceObject(FileObject);
 157
 158   return(Status);
 159 }
 160
 161
 162 VOID FASTCALL
 163 xHalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
 164                IN ULONG SectorSize,
 165                IN ULONG MBRTypeIdentifier,
 166                OUT PVOID *Buffer)
 167 {
 168   KEVENT Event;
 169   IO_STATUS_BLOCK StatusBlock;
 170   LARGE_INTEGER Offset;
 171   PUCHAR LocalBuffer;
 172   PIRP Irp;
 173   NTSTATUS Status;
 174
 175   DPRINT("xHalExamineMBR()\n");
 176   *Buffer = NULL;
 177
 178   if (SectorSize < 512)
 179     SectorSize = 512;
 180   if (SectorSize > 4096)
 181     SectorSize = 4096;
 182
 183   LocalBuffer = (PUCHAR)ExAllocatePool(PagedPool,
 184                                        SectorSize);
 185   if (LocalBuffer == NULL)
 186     return;
 187
 188   KeInitializeEvent(&Event,
 189                     NotificationEvent,
 190                     FALSE);
 191
 192   Offset.QuadPart = 0;
 193
 194   Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
 195                                      DeviceObject,
 196                                      LocalBuffer,
 197                                      SectorSize,
 198                                      &Offset,
 199                                      &Event,
 200                                      &StatusBlock);
 201
 202   Status = IoCallDriver(DeviceObject,
 203                         Irp);
 204   if (Status == STATUS_PENDING)
 205     {
 206       KeWaitForSingleObject(&Event,
 207                             Executive,
 208                             KernelMode,
 209                             FALSE,
 210                             NULL);
 211       Status = StatusBlock.Status;
 212     }
 213
 214   if (!NT_SUCCESS(Status))
 215     {
 216       DPRINT("xHalExamineMBR failed (Status = 0x%08lx)\n",
 217              Status);
 218       ExFreePool(LocalBuffer);
 219       return;
 220     }
 221
 222   if (LocalBuffer[0x1FE] != 0x55 || LocalBuffer[0x1FF] != 0xAA)
 223     {
 224       DPRINT("xHalExamineMBR: invalid MBR signature\n");
 225       ExFreePool(LocalBuffer);
 226       return;
 227     }
 228
 229   if (LocalBuffer[0x1C2] != MBRTypeIdentifier)
 230     {
 231       DPRINT("xHalExamineMBR: invalid MBRTypeIdentifier\n");
 232       ExFreePool(LocalBuffer);
 233       return;
 234     }
 235
 236   *Buffer = (PVOID)LocalBuffer;
 237 }
 238
 239
 240 static VOID
 241 HalpAssignDrive(IN PUNICODE_STRING PartitionName,
 242                 IN ULONG DriveNumber,
 243                 IN UCHAR DriveType)
 244 {
 245   WCHAR DriveNameBuffer[8];
 246   UNICODE_STRING DriveName;
 247   ULONG i;
 248
 249   DPRINT("HalpAssignDrive()\n");
 250
 251   if ((DriveNumber != AUTO_DRIVE) && (DriveNumber < 24))
 252     {
 253       /* Force assignment */
 254       if ((SharedUserData->DosDeviceMap & (1 << DriveNumber)) != 0)
 255         {
 256           DbgPrint("Drive letter already used!\n");
 257           return;
 258         }
 259     }
 260   else
 261     {
 262       /* Automatic assignment */
 263       DriveNumber = AUTO_DRIVE;
 264
 265       for (i = 2; i < 24; i++)
 266         {
 267           if ((SharedUserData->DosDeviceMap & (1 << i)) == 0)
 268             {
 269               DriveNumber = i;
 270               break;
 271             }
 272         }
 273
 274       if (DriveNumber == AUTO_DRIVE)
 275         {
 276           DbgPrint("No drive letter available!\n");
 277           return;
 278         }
 279     }
 280
 281   DPRINT("DriveNumber %d\n", DriveNumber);
 282
 283   /* Update the shared user page */
 284   SharedUserData->DosDeviceMap |= (1 << DriveNumber);
 285   SharedUserData->DosDeviceDriveType[DriveNumber] = DriveType;
 286
 287   /* Build drive name */
 288   swprintf(DriveNameBuffer,
 289            L"\\??\\%C:",
 290            'A' + DriveNumber);
 291   RtlInitUnicodeString(&DriveName,
 292                        DriveNameBuffer);
 293
 294   DPRINT("  %wZ ==> %wZ\n",
 295          &DriveName,
 296          PartitionName);
 297
 298   /* Create symbolic link */
 299   IoCreateSymbolicLink(&DriveName,
 300                        PartitionName);
 301 }
 302
 303
 304 VOID FASTCALL
 305 xHalIoAssignDriveLetters(IN PLOADER_PARAMETER_BLOCK LoaderBlock,
 306                          IN PSTRING NtDeviceName,
 307                          OUT PUCHAR NtSystemPath,
 308                          OUT PSTRING NtSystemPathString)
 309 {
 310   PDRIVE_LAYOUT_INFORMATION *LayoutArray;
 311   PCONFIGURATION_INFORMATION ConfigInfo;
 312   OBJECT_ATTRIBUTES ObjectAttributes;
 313   IO_STATUS_BLOCK StatusBlock;
 314   UNICODE_STRING UnicodeString1;
 315   UNICODE_STRING UnicodeString2;
 316   HANDLE FileHandle;
 317   PWSTR Buffer1;
 318   PWSTR Buffer2;
 319   ULONG i;
 320   NTSTATUS Status;
 321   ULONG j;
 322
 323   DPRINT("xHalIoAssignDriveLetters()\n");
 324
 325   ConfigInfo = IoGetConfigurationInformation();
 326
 327   Buffer1 = (PWSTR)ExAllocatePool(PagedPool,
 328                                   64 * sizeof(WCHAR));
 329   Buffer2 = (PWSTR)ExAllocatePool(PagedPool,
 330                                   32 * sizeof(WCHAR));
 331
 332   /* Create PhysicalDrive links */
 333   DPRINT("Physical disk drives: %d\n", ConfigInfo->DiskCount);
 334   for (i = 0; i < ConfigInfo->DiskCount; i++)
 335     {
 336       swprintf(Buffer1,
 337                L"\\Device\\Harddisk%d\\Partition0",
 338                 i);
 339       RtlInitUnicodeString(&UnicodeString1,
 340                            Buffer1);
 341
 342       InitializeObjectAttributes(&ObjectAttributes,
 343                                  &UnicodeString1,
 344                                  0,
 345                                  NULL,
 346                                  NULL);
 347
 348       Status = NtOpenFile(&FileHandle,
 349                           0x10001,
 350                           &ObjectAttributes,
 351                           &StatusBlock,
 352                           1,
 353                           FILE_SYNCHRONOUS_IO_NONALERT);
 354       if (NT_SUCCESS(Status))
 355         {
 356           NtClose(FileHandle);
 357
 358           swprintf(Buffer2,
 359                    L"\\??\\PhysicalDrive%d",
 360                    i);
 361           RtlInitUnicodeString(&UnicodeString2,
 362                                Buffer2);
 363
 364           DPRINT("Creating link: %S ==> %S\n",
 365                  Buffer2,
 366                  Buffer1);
 367
 368           IoCreateSymbolicLink(&UnicodeString2,
 369                                &UnicodeString1);
 370         }
 371     }
 372
 373   /* Initialize layout array */
 374   LayoutArray = ExAllocatePool(NonPagedPool,
 375                                ConfigInfo->DiskCount * sizeof(PDRIVE_LAYOUT_INFORMATION));
 376   RtlZeroMemory(LayoutArray,
 377                 ConfigInfo->DiskCount * sizeof(PDRIVE_LAYOUT_INFORMATION));
 378   for (i = 0; i < ConfigInfo->DiskCount; i++)
 379     {
 380       swprintf(Buffer1,
 381                L"\\Device\\Harddisk%d\\Partition0",
 382                i);
 383       RtlInitUnicodeString(&UnicodeString1,
 384                            Buffer1);
 385
 386       Status = xHalQueryDriveLayout(&UnicodeString1,
 387                                     &LayoutArray[i]);
 388       if (!NT_SUCCESS(Status))
 389         {
 390           DbgPrint("xHalQueryDriveLayout() failed (Status = 0x%lx)\n",
 391                    Status);
 392           LayoutArray[i] = NULL;
 393           continue;
 394         }
 395     }
 396
 397 #ifndef NDEBUG
 398   /* Dump layout array */
 399   for (i = 0; i < ConfigInfo->DiskCount; i++)
 400     {
 401       DPRINT("Harddisk %d:\n",
 402              i);
 403
 404       if (LayoutArray[i] == NULL)
 405         continue;
 406
 407       DPRINT("Logical partitions: %d\n",
 408              LayoutArray[i]->PartitionCount);
 409
 410       for (j = 0; j < LayoutArray[i]->PartitionCount; j++)
 411         {
 412           DPRINT("  %d: nr:%x boot:%x type:%x startblock:%I64u count:%I64u\n",
 413                  j,
 414                  LayoutArray[i]->PartitionEntry[j].PartitionNumber,
 415                  LayoutArray[i]->PartitionEntry[j].BootIndicator,
 416                  LayoutArray[i]->PartitionEntry[j].PartitionType,
 417                  LayoutArray[i]->PartitionEntry[j].StartingOffset.QuadPart,
 418                  LayoutArray[i]->PartitionEntry[j].PartitionLength.QuadPart);
 419         }
 420     }
 421 #endif
 422
 423   /* Assign pre-assigned (registry) partitions */
 424
 425
 426   /* Assign bootable partition on first harddisk */
 427   DPRINT("Assigning bootable primary partition on first harddisk:\n");
 428   if (ConfigInfo->DiskCount > 0)
 429     {
 430       /* Search for bootable partition */
 431       for (j = 0; j < LayoutArray[0]->PartitionCount; j++)
 432         {
 433           if ((LayoutArray[0]->PartitionEntry[j].BootIndicator == TRUE) &&
 434               IsRecognizedPartition(LayoutArray[0]->PartitionEntry[j].PartitionType))
 435             {
 436               swprintf(Buffer2,
 437                        L"\\Device\\Harddisk0\\Partition%d",
 438                        LayoutArray[0]->PartitionEntry[j].PartitionNumber);
 439               RtlInitUnicodeString(&UnicodeString2,
 440                                    Buffer2);
 441
 442               /* Assign drive */
 443               DPRINT("  %wZ\n", &UnicodeString2);
 444               HalpAssignDrive(&UnicodeString2,
 445                               AUTO_DRIVE,
 446                               DOSDEVICE_DRIVE_FIXED);
 447             }
 448         }
 449     }
 450
 451   /* Assign remaining  primary partitions */
 452   DPRINT("Assigning remaining primary partitions:\n");
 453   for (i = 0; i < ConfigInfo->DiskCount; i++)
 454     {
 455       /* Search for primary partitions */
 456       for (j = 0; (j < PARTITION_TBL_SIZE) && (j < LayoutArray[i]->PartitionCount); j++)
 457         {
 458           if ((i == 0) && (LayoutArray[i]->PartitionEntry[j].BootIndicator == TRUE))
 459             continue;
 460
 461           if (IsRecognizedPartition(LayoutArray[i]->PartitionEntry[j].PartitionType))
 462             {
 463               swprintf(Buffer2,
 464                        L"\\Device\\Harddisk%d\\Partition%d",
 465                        i,
 466                        LayoutArray[i]->PartitionEntry[j].PartitionNumber);
 467               RtlInitUnicodeString(&UnicodeString2,
 468                                    Buffer2);
 469
 470               /* Assign drive */
 471               DPRINT("  %wZ\n",
 472                      &UnicodeString2);
 473               HalpAssignDrive(&UnicodeString2,
 474                               AUTO_DRIVE,
 475                               DOSDEVICE_DRIVE_FIXED);
 476             }
 477         }
 478     }
 479
 480   /* Assign extended (logical) partitions */
 481   DPRINT("Assigning extended (logical) partitions:\n");
 482   for (i = 0; i < ConfigInfo->DiskCount; i++)
 483     {
 484       if (LayoutArray[i])
 485         {
 486           /* Search for extended partitions */
 487           for (j = PARTITION_TBL_SIZE; j < LayoutArray[i]->PartitionCount; j++)
 488             {
 489               if (IsRecognizedPartition(LayoutArray[i]->PartitionEntry[j].PartitionType) &&
 490                   (LayoutArray[i]->PartitionEntry[j].PartitionNumber != 0))
 491                 {
 492                   swprintf(Buffer2,
 493                            L"\\Device\\Harddisk%d\\Partition%d",
 494                            i,
 495                            LayoutArray[i]->PartitionEntry[j].PartitionNumber);
 496                   RtlInitUnicodeString(&UnicodeString2,
 497                                        Buffer2);
 498
 499                   /* Assign drive */
 500                   DPRINT("  %wZ\n",
 501                          &UnicodeString2);
 502                   HalpAssignDrive(&UnicodeString2,
 503                                   AUTO_DRIVE,
 504                                   DOSDEVICE_DRIVE_FIXED);
 505                 }
 506             }
 507         }
 508     }
 509
 510   /* Assign removable disk drives */
 511   DPRINT("Assigning removable disk drives:\n");
 512   for (i = 0; i < ConfigInfo->DiskCount; i++)
 513     {
 514       /* Search for virtual partitions */
 515       if (LayoutArray[i]->PartitionCount == 1 &&
 516           LayoutArray[i]->PartitionEntry[0].PartitionType == 0)
 517         {
 518           swprintf(Buffer2,
 519                    L"\\Device\\Harddisk%d\\Partition1",
 520                    i);
 521           RtlInitUnicodeString(&UnicodeString2,
 522                                Buffer2);
 523
 524           /* Assign drive */
 525           DPRINT("  %wZ\n",
 526                  &UnicodeString2);
 527           HalpAssignDrive(&UnicodeString2,
 528                           AUTO_DRIVE,
 529                           DOSDEVICE_DRIVE_REMOVABLE);
 530         }
 531     }
 532
 533   /* Free layout array */
 534   for (i = 0; i < ConfigInfo->DiskCount; i++)
 535     {
 536       if (LayoutArray[i] != NULL)
 537         ExFreePool(LayoutArray[i]);
 538     }
 539   ExFreePool(LayoutArray);
 540
 541   /* Assign floppy drives */
 542   DPRINT("Floppy drives: %d\n", ConfigInfo->FloppyCount);
 543   for (i = 0; i < ConfigInfo->FloppyCount; i++)
 544     {
 545       swprintf(Buffer1,
 546                L"\\Device\\Floppy%d",
 547                i);
 548       RtlInitUnicodeString(&UnicodeString1,
 549                            Buffer1);
 550
 551       /* Assign drive letters A: or B: or first free drive letter */
 552       DPRINT("  %wZ\n",
 553              &UnicodeString1);
 554       HalpAssignDrive(&UnicodeString1,
 555                       (i < 2) ? i : AUTO_DRIVE,
 556                       DOSDEVICE_DRIVE_REMOVABLE);
 557     }
 558
 559   /* Assign cdrom drives */
 560   DPRINT("CD-Rom drives: %d\n", ConfigInfo->CDRomCount);
 561   for (i = 0; i < ConfigInfo->CDRomCount; i++)
 562     {
 563       swprintf(Buffer1,
 564                L"\\Device\\CdRom%d",
 565                i);
 566       RtlInitUnicodeString(&UnicodeString1,
 567                            Buffer1);
 568
 569       /* Assign first free drive letter */
 570       DPRINT("  %wZ\n", &UnicodeString1);
 571       HalpAssignDrive(&UnicodeString1,
 572                       AUTO_DRIVE,
 573                       DOSDEVICE_DRIVE_CDROM);
 574     }
 575
 576   /* Anything else ?? */
 577
 578   ExFreePool(Buffer2);
 579   ExFreePool(Buffer1);
 580 }
 581
 582
 583 NTSTATUS FASTCALL
 584 xHalIoReadPartitionTable(PDEVICE_OBJECT DeviceObject,
 585                          ULONG SectorSize,
 586                          BOOLEAN ReturnRecognizedPartitions,
 587                          PDRIVE_LAYOUT_INFORMATION *PartitionBuffer)
 588 {
 589   KEVENT Event;
 590   IO_STATUS_BLOCK StatusBlock;
 591   ULARGE_INTEGER PartitionOffset;
 592   ULARGE_INTEGER  nextPartitionOffset;
 593   ULARGE_INTEGER  containerOffset;
 594   PUCHAR SectorBuffer;
 595   PIRP Irp;
 596   NTSTATUS Status;
 597   PPARTITION_TABLE PartitionTable;
 598   PDRIVE_LAYOUT_INFORMATION LayoutBuffer;
 599   ULONG i;
 600   ULONG Count = 0;
 601   ULONG Number = 1;
 602   BOOLEAN ExtendedFound = FALSE;
 603
 604   DPRINT("xHalIoReadPartitionTable(%p %lu %x %p)\n",
 605          DeviceObject,
 606          SectorSize,
 607          ReturnRecognizedPartitions,
 608          PartitionBuffer);
 609
 610   *PartitionBuffer = NULL;
 611
 612   SectorBuffer = (PUCHAR)ExAllocatePool(PagedPool,
 613                                         SectorSize);
 614   if (SectorBuffer == NULL)
 615     {
 616       return(STATUS_INSUFFICIENT_RESOURCES);
 617     }
 618
 619   LayoutBuffer = (PDRIVE_LAYOUT_INFORMATION)ExAllocatePool(NonPagedPool,
 620                                                            0x1000);
 621   if (LayoutBuffer == NULL)
 622     {
 623       ExFreePool(SectorBuffer);
 624       return(STATUS_INSUFFICIENT_RESOURCES);
 625     }
 626
 627   RtlZeroMemory(LayoutBuffer,
 628                 0x1000);
 629
 630   PartitionOffset.QuadPart = 0;
 631   containerOffset.QuadPart = 0;
 632
 633   do
 634     {
 635       KeInitializeEvent(&Event,
 636                         NotificationEvent,
 637                         FALSE);
 638
 639       DPRINT("PartitionOffset: %I64u\n", PartitionOffset.QuadPart / SectorSize);
 640
 641       Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
 642                                          DeviceObject,
 643                                          SectorBuffer,
 644                                          SectorSize,
 645                                          (PLARGE_INTEGER)&PartitionOffset,
 646                                          &Event,
 647                                          &StatusBlock);
 648       Status = IoCallDriver(DeviceObject,
 649                             Irp);
 650       if (Status == STATUS_PENDING)
 651         {
 652           KeWaitForSingleObject(&Event,
 653                                 Executive,
 654                                 KernelMode,
 655                                 FALSE,
 656                                 NULL);
 657           Status = StatusBlock.Status;
 658         }
 659
 660       if (!NT_SUCCESS(Status))
 661         {
 662           DPRINT("Failed to read partition table sector (Status = 0x%08lx)\n",
 663                  Status);
 664           ExFreePool(SectorBuffer);
 665           ExFreePool(LayoutBuffer);
 666           return(Status);
 667         }
 668
 669       PartitionTable = (PPARTITION_TABLE)(SectorBuffer + PARTITION_OFFSET);
 670
 671       /* check the boot sector id */
 672       DPRINT("Magic %x\n", PartitionTable->Magic);
 673       if (PartitionTable->Magic != PARTITION_MAGIC)
 674         {
 675           DbgPrint("Invalid partition table magic\n");
 676           ExFreePool(SectorBuffer);
 677           *PartitionBuffer = LayoutBuffer;
 678           return(STATUS_SUCCESS);
 679         }
 680
 681 #ifndef NDEBUG
 682       for (i = 0; i < PARTITION_TBL_SIZE; i++)
 683         {
 684           DPRINT1("  %d: flags:%2x type:%x start:%d:%d:%d end:%d:%d:%d stblk:%d count:%d\n",
 685                   i,
 686                   PartitionTable->Partition[i].BootFlags,
 687                   PartitionTable->Partition[i].PartitionType,
 688                   PartitionTable->Partition[i].StartingHead,
 689                   PartitionTable->Partition[i].StartingSector & 0x3f,
 690                   (((PartitionTable->Partition[i].StartingSector) & 0xc0) << 2) +
 691                      PartitionTable->Partition[i].StartingCylinder,
 692                   PartitionTable->Partition[i].EndingHead,
 693                   PartitionTable->Partition[i].EndingSector,
 694                   PartitionTable->Partition[i].EndingCylinder,
 695                   PartitionTable->Partition[i].StartingBlock,
 696                   PartitionTable->Partition[i].SectorCount);
 697         }
 698 #endif
 699
 700       if (ExtendedFound == FALSE);
 701         {
 702           LayoutBuffer->Signature = *((PULONG)(SectorBuffer + SIGNATURE_OFFSET));
 703         }
 704
 705       ExtendedFound = FALSE;
 706
 707       for (i = 0; i < PARTITION_TBL_SIZE; i++)
 708         {
 709           if ((ReturnRecognizedPartitions == FALSE) ||
 710                ((ReturnRecognizedPartitions == TRUE) &&
 711                 IsRecognizedPartition(PartitionTable->Partition[i].PartitionType)))
 712             {
 713               /* handle normal partition */
 714               DPRINT("Partition %u: Normal Partition\n", i);
 715               Count = LayoutBuffer->PartitionCount;
 716               DPRINT("Logical Partition %u\n", Count);
 717               if (PartitionTable->Partition[i].StartingBlock == 0)
 718                 {
 719                   LayoutBuffer->PartitionEntry[Count].StartingOffset.QuadPart = 0;
 720                 }
 721               else if (IsContainerPartition(PartitionTable->Partition[i].PartitionType))
 722                 {
 723                   LayoutBuffer->PartitionEntry[Count].StartingOffset.QuadPart =
 724                     (ULONGLONG)PartitionOffset.QuadPart;
 725                 }
 726               else
 727                 {
 728                   LayoutBuffer->PartitionEntry[Count].StartingOffset.QuadPart =
 729                     (ULONGLONG)PartitionOffset.QuadPart +
 730                     ((ULONGLONG)PartitionTable->Partition[i].StartingBlock * (ULONGLONG)SectorSize);
 731                 }
 732               LayoutBuffer->PartitionEntry[Count].PartitionLength.QuadPart =
 733                 (ULONGLONG)PartitionTable->Partition[i].SectorCount * (ULONGLONG)SectorSize;
 734               LayoutBuffer->PartitionEntry[Count].HiddenSectors = 0;
 735
 736               if (IsRecognizedPartition(PartitionTable->Partition[i].PartitionType))
 737                 {
 738                   LayoutBuffer->PartitionEntry[Count].PartitionNumber = Number;
 739                   Number++;
 740                 }
 741               else
 742                 {
 743                   LayoutBuffer->PartitionEntry[Count].PartitionNumber = 0;
 744                 }
 745
 746               LayoutBuffer->PartitionEntry[Count].PartitionType =
 747                 PartitionTable->Partition[i].PartitionType;
 748               LayoutBuffer->PartitionEntry[Count].BootIndicator =
 749                 (PartitionTable->Partition[i].BootFlags & 0x80)?TRUE:FALSE;
 750               LayoutBuffer->PartitionEntry[Count].RecognizedPartition =
 751                 IsRecognizedPartition (PartitionTable->Partition[i].PartitionType);
 752               LayoutBuffer->PartitionEntry[Count].RewritePartition = FALSE;
 753
 754               DPRINT(" %ld: nr: %d boot: %1x type: %x start: 0x%I64x count: 0x%I64x\n",
 755                      Count,
 756                      LayoutBuffer->PartitionEntry[Count].PartitionNumber,
 757                      LayoutBuffer->PartitionEntry[Count].BootIndicator,
 758                      LayoutBuffer->PartitionEntry[Count].PartitionType,
 759                      LayoutBuffer->PartitionEntry[Count].StartingOffset.QuadPart,
 760                      LayoutBuffer->PartitionEntry[Count].PartitionLength.QuadPart);
 761
 762               LayoutBuffer->PartitionCount++;
 763             }
 764
 765           if (IsContainerPartition(PartitionTable->Partition[i].PartitionType))
 766             {
 767               ExtendedFound = TRUE;
 768               if ((ULONGLONG) containerOffset.QuadPart == (ULONGLONG) 0)
 769                 {
 770                   containerOffset = PartitionOffset;
 771                 }
 772               nextPartitionOffset.QuadPart = (ULONGLONG) containerOffset.QuadPart +
 773                 (ULONGLONG) PartitionTable->Partition[i].StartingBlock *
 774                 (ULONGLONG) SectorSize;
 775             }
 776         }
 777       PartitionOffset = nextPartitionOffset;
 778     }
 779   while (ExtendedFound == TRUE);
 780
 781   *PartitionBuffer = LayoutBuffer;
 782   ExFreePool(SectorBuffer);
 783
 784   return(STATUS_SUCCESS);
 785 }
 786
 787
 788 NTSTATUS FASTCALL
 789 xHalIoSetPartitionInformation(IN PDEVICE_OBJECT DeviceObject,
 790                               IN ULONG SectorSize,
 791                               IN ULONG PartitionNumber,
 792                               IN ULONG PartitionType)
 793 {
 794   return(STATUS_NOT_IMPLEMENTED);
 795 }
 796
 797
 798 NTSTATUS FASTCALL
 799 xHalIoWritePartitionTable(IN PDEVICE_OBJECT DeviceObject,
 800                           IN ULONG SectorSize,
 801                           IN ULONG SectorsPerTrack,
 802                           IN ULONG NumberOfHeads,
 803                           IN PDRIVE_LAYOUT_INFORMATION PartitionBuffer)
 804 {
 805   return(STATUS_NOT_IMPLEMENTED);
 806 }
 807
 808 /* EOF */