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[VCDROM] Implement the virtual CD-ROM class driver.
[reactos.git] / ntoskrnl / fstub / disksup.c
1 /*
2 * PROJECT: ReactOS Kernel
3 * LICENSE: GPL - See COPYING in the top level directory
4 * FILE: ntoskrnl/fstub/disksup.c
5 * PURPOSE: I/O HAL Routines for Disk Access
6 * PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
7 * Eric Kohl
8 * Casper S. Hornstrup (chorns@users.sourceforge.net)
9 */
10
11 /* INCLUDES ******************************************************************/
12
13 #include <ntoskrnl.h>
14 #define NDEBUG
15 #include <debug.h>
16 #include <internal/hal.h>
17
18 /* DEPRECATED FUNCTIONS ******************************************************/
19
20 #if 1
21 const WCHAR DiskMountString[] = L"\\DosDevices\\%C:";
22
23 #define AUTO_DRIVE MAXULONG
24
25 #define PARTITION_MAGIC 0xaa55
26
27 #define EFI_PMBR_OSTYPE_EFI 0xEE
28
29 #include <pshpack1.h>
30
31 typedef struct _REG_DISK_MOUNT_INFO
32 {
33 ULONG Signature;
34 LARGE_INTEGER StartingOffset;
35 } REG_DISK_MOUNT_INFO, *PREG_DISK_MOUNT_INFO;
36
37 #include <poppack.h>
38
39 typedef enum _DISK_MANAGER
40 {
41 NoDiskManager,
42 OntrackDiskManager,
43 EZ_Drive
44 } DISK_MANAGER;
45
46 static BOOLEAN
47 HalpAssignDrive(IN PUNICODE_STRING PartitionName,
48 IN ULONG DriveNumber,
49 IN UCHAR DriveType,
50 IN ULONG Signature,
51 IN LARGE_INTEGER StartingOffset,
52 IN HANDLE hKey,
53 IN PUNICODE_STRING BootDevice,
54 OUT PUCHAR NtSystemPath)
55 {
56 WCHAR DriveNameBuffer[16];
57 UNICODE_STRING DriveName;
58 ULONG i;
59 NTSTATUS Status;
60 REG_DISK_MOUNT_INFO DiskMountInfo;
61
62 DPRINT("HalpAssignDrive()\n");
63
64 if ((DriveNumber != AUTO_DRIVE) && (DriveNumber < 26))
65 {
66 /* Force assignment */
67 KeAcquireGuardedMutex(&ObpDeviceMapLock);
68 if ((ObSystemDeviceMap->DriveMap & (1 << DriveNumber)) != 0)
69 {
70 DbgPrint("Drive letter already used!\n");
71 KeReleaseGuardedMutex(&ObpDeviceMapLock);
72 return FALSE;
73 }
74 KeReleaseGuardedMutex(&ObpDeviceMapLock);
75 }
76 else
77 {
78 /* Automatic assignment */
79 DriveNumber = AUTO_DRIVE;
80 KeAcquireGuardedMutex(&ObpDeviceMapLock);
81 for (i = 2; i < 26; i++)
82 {
83 if ((ObSystemDeviceMap->DriveMap & (1 << i)) == 0)
84 {
85 DriveNumber = i;
86 break;
87 }
88 }
89 KeReleaseGuardedMutex(&ObpDeviceMapLock);
90
91 if (DriveNumber == AUTO_DRIVE)
92 {
93 DbgPrint("No drive letter available!\n");
94 return FALSE;
95 }
96 }
97
98 DPRINT("DriveNumber %lu\n", DriveNumber);
99
100 /* Build drive name */
101 swprintf(DriveNameBuffer,
102 L"\\??\\%C:",
103 'A' + DriveNumber);
104 RtlInitUnicodeString(&DriveName,
105 DriveNameBuffer);
106
107 DPRINT(" %wZ ==> %wZ\n",
108 &DriveName,
109 PartitionName);
110
111 /* Create symbolic link */
112 Status = IoCreateSymbolicLink(&DriveName,
113 PartitionName);
114
115 if (hKey &&
116 DriveType == DOSDEVICE_DRIVE_FIXED &&
117 Signature)
118 {
119 DiskMountInfo.Signature = Signature;
120 DiskMountInfo.StartingOffset = StartingOffset;
121 swprintf(DriveNameBuffer, DiskMountString, L'A' + DriveNumber);
122 RtlInitUnicodeString(&DriveName, DriveNameBuffer);
123
124 Status = ZwSetValueKey(hKey,
125 &DriveName,
126 0,
127 REG_BINARY,
128 &DiskMountInfo,
129 sizeof(DiskMountInfo));
130 if (!NT_SUCCESS(Status))
131 {
132 DPRINT1("ZwCreateValueKey failed for %wZ, status=%x\n", &DriveName, Status);
133 }
134 }
135
136 /* Check if this is a boot partition */
137 if (RtlCompareUnicodeString(PartitionName, BootDevice, FALSE) == 0)
138 {
139 /* Set NtSystemPath to that partition's disk letter */
140 *NtSystemPath = (UCHAR)('A' + DriveNumber);
141 }
142
143 return TRUE;
144 }
145
146 ULONG
147 xHalpGetRDiskCount(VOID)
148 {
149 NTSTATUS Status;
150 UNICODE_STRING ArcName;
151 PWCHAR ArcNameBuffer;
152 OBJECT_ATTRIBUTES ObjectAttributes;
153 HANDLE DirectoryHandle;
154 POBJECT_DIRECTORY_INFORMATION DirectoryInfo;
155 ULONG Skip;
156 ULONG ResultLength;
157 ULONG CurrentRDisk;
158 ULONG RDiskCount;
159 BOOLEAN First = TRUE;
160 ULONG Count;
161
162 DirectoryInfo = ExAllocatePoolWithTag(PagedPool, 2 * PAGE_SIZE, TAG_FILE_SYSTEM);
163 if (DirectoryInfo == NULL)
164 {
165 return 0;
166 }
167
168 RtlInitUnicodeString(&ArcName, L"\\ArcName");
169 InitializeObjectAttributes(&ObjectAttributes,
170 &ArcName,
171 0,
172 NULL,
173 NULL);
174
175 Status = ZwOpenDirectoryObject (&DirectoryHandle,
176 DIRECTORY_ALL_ACCESS,
177 &ObjectAttributes);
178 if (!NT_SUCCESS(Status))
179 {
180 DPRINT1("ZwOpenDirectoryObject for %wZ failed, status=%lx\n", &ArcName, Status);
181 ExFreePoolWithTag(DirectoryInfo, TAG_FILE_SYSTEM);
182 return 0;
183 }
184
185 RDiskCount = 0;
186 Skip = 0;
187 while (NT_SUCCESS(Status))
188 {
189 Status = ZwQueryDirectoryObject (DirectoryHandle,
190 DirectoryInfo,
191 2 * PAGE_SIZE,
192 FALSE,
193 First,
194 &Skip,
195 &ResultLength);
196 First = FALSE;
197 if (NT_SUCCESS(Status))
198 {
199 Count = 0;
200 while (DirectoryInfo[Count].Name.Buffer)
201 {
202 DPRINT("Count %x\n", Count);
203 DirectoryInfo[Count].Name.Buffer[DirectoryInfo[Count].Name.Length / sizeof(WCHAR)] = 0;
204 ArcNameBuffer = DirectoryInfo[Count].Name.Buffer;
205 if (DirectoryInfo[Count].Name.Length >= sizeof(L"multi(0)disk(0)rdisk(0)") - sizeof(WCHAR) &&
206 !_wcsnicmp(ArcNameBuffer, L"multi(0)disk(0)rdisk(", (sizeof(L"multi(0)disk(0)rdisk(") - sizeof(WCHAR)) / sizeof(WCHAR)))
207 {
208 DPRINT("%S\n", ArcNameBuffer);
209 ArcNameBuffer += (sizeof(L"multi(0)disk(0)rdisk(") - sizeof(WCHAR)) / sizeof(WCHAR);
210 CurrentRDisk = 0;
211 while (iswdigit(*ArcNameBuffer))
212 {
213 CurrentRDisk = CurrentRDisk * 10 + *ArcNameBuffer - L'0';
214 ArcNameBuffer++;
215 }
216 if (!_wcsicmp(ArcNameBuffer, L")") &&
217 CurrentRDisk >= RDiskCount)
218 {
219 RDiskCount = CurrentRDisk + 1;
220 }
221 }
222 Count++;
223 }
224 }
225 }
226
227 ZwClose(DirectoryHandle);
228
229 ExFreePoolWithTag(DirectoryInfo, TAG_FILE_SYSTEM);
230 return RDiskCount;
231 }
232
233 NTSTATUS
234 xHalpGetDiskNumberFromRDisk(ULONG RDisk, PULONG DiskNumber)
235 {
236 WCHAR NameBuffer[80];
237 UNICODE_STRING ArcName;
238 UNICODE_STRING LinkName;
239 OBJECT_ATTRIBUTES ObjectAttributes;
240 HANDLE LinkHandle;
241 NTSTATUS Status;
242
243 swprintf(NameBuffer,
244 L"\\ArcName\\multi(0)disk(0)rdisk(%lu)",
245 RDisk);
246
247 RtlInitUnicodeString(&ArcName, NameBuffer);
248 InitializeObjectAttributes(&ObjectAttributes,
249 &ArcName,
250 0,
251 NULL,
252 NULL);
253 Status = ZwOpenSymbolicLinkObject(&LinkHandle,
254 SYMBOLIC_LINK_ALL_ACCESS,
255 &ObjectAttributes);
256 if (!NT_SUCCESS(Status))
257 {
258 DPRINT1("ZwOpenSymbolicLinkObject failed for %wZ, status=%lx\n", &ArcName, Status);
259 return Status;
260 }
261
262 LinkName.Buffer = NameBuffer;
263 LinkName.Length = 0;
264 LinkName.MaximumLength = sizeof(NameBuffer);
265 Status = ZwQuerySymbolicLinkObject(LinkHandle,
266 &LinkName,
267 NULL);
268 ZwClose(LinkHandle);
269 if (!NT_SUCCESS(Status))
270 {
271 DPRINT1("ZwQuerySymbolicLinkObject failed, status=%lx\n", Status);
272 return Status;
273 }
274 if (LinkName.Length < sizeof(L"\\Device\\Harddisk0\\Partition0") - sizeof(WCHAR) ||
275 LinkName.Length >= sizeof(NameBuffer))
276 {
277 return STATUS_UNSUCCESSFUL;
278 }
279
280 NameBuffer[LinkName.Length / sizeof(WCHAR)] = 0;
281 if (_wcsnicmp(NameBuffer, L"\\Device\\Harddisk", (sizeof(L"\\Device\\Harddisk") - sizeof(WCHAR)) / sizeof(WCHAR)))
282 {
283 return STATUS_UNSUCCESSFUL;
284 }
285 LinkName.Buffer += (sizeof(L"\\Device\\Harddisk") - sizeof(WCHAR)) / sizeof(WCHAR);
286
287 if (!iswdigit(*LinkName.Buffer))
288 {
289 return STATUS_UNSUCCESSFUL;
290 }
291 *DiskNumber = 0;
292 while (iswdigit(*LinkName.Buffer))
293 {
294 *DiskNumber = *DiskNumber * 10 + *LinkName.Buffer - L'0';
295 LinkName.Buffer++;
296 }
297 if (_wcsicmp(LinkName.Buffer, L"\\Partition0"))
298 {
299 return STATUS_UNSUCCESSFUL;
300 }
301 return STATUS_SUCCESS;
302 }
303
304 NTSTATUS
305 FASTCALL
306 xHalQueryDriveLayout(IN PUNICODE_STRING DeviceName,
307 OUT PDRIVE_LAYOUT_INFORMATION *LayoutInfo)
308 {
309 IO_STATUS_BLOCK StatusBlock;
310 DISK_GEOMETRY DiskGeometry;
311 PDEVICE_OBJECT DeviceObject = NULL;
312 PFILE_OBJECT FileObject;
313 KEVENT Event;
314 PIRP Irp;
315 NTSTATUS Status;
316
317 DPRINT("xHalpQueryDriveLayout %wZ %p\n",
318 DeviceName,
319 LayoutInfo);
320
321 /* Get the drives sector size */
322 Status = IoGetDeviceObjectPointer(DeviceName,
323 FILE_READ_ATTRIBUTES,
324 &FileObject,
325 &DeviceObject);
326 if (!NT_SUCCESS(Status))
327 {
328 DPRINT("Status %x\n", Status);
329 return(Status);
330 }
331
332 KeInitializeEvent(&Event,
333 NotificationEvent,
334 FALSE);
335
336 Irp = IoBuildDeviceIoControlRequest(IOCTL_DISK_GET_DRIVE_GEOMETRY,
337 DeviceObject,
338 NULL,
339 0,
340 &DiskGeometry,
341 sizeof(DISK_GEOMETRY),
342 FALSE,
343 &Event,
344 &StatusBlock);
345 if (Irp == NULL)
346 {
347 ObDereferenceObject(FileObject);
348 return(STATUS_INSUFFICIENT_RESOURCES);
349 }
350
351 Status = IoCallDriver(DeviceObject,
352 Irp);
353 if (Status == STATUS_PENDING)
354 {
355 KeWaitForSingleObject(&Event,
356 Executive,
357 KernelMode,
358 FALSE,
359 NULL);
360 Status = StatusBlock.Status;
361 }
362 if (!NT_SUCCESS(Status))
363 {
364 if (DeviceObject->Characteristics & FILE_REMOVABLE_MEDIA)
365 {
366 DiskGeometry.BytesPerSector = 512;
367 }
368 else
369 {
370 ObDereferenceObject(FileObject);
371 return(Status);
372 }
373 }
374
375 DPRINT("DiskGeometry.BytesPerSector: %lu\n",
376 DiskGeometry.BytesPerSector);
377
378 if (DeviceObject->Characteristics & FILE_REMOVABLE_MEDIA)
379 {
380 PDRIVE_LAYOUT_INFORMATION Buffer;
381
382 /* Allocate a partition list for a single entry. */
383 Buffer = ExAllocatePoolWithTag(NonPagedPool,
384 sizeof(DRIVE_LAYOUT_INFORMATION), TAG_FILE_SYSTEM);
385 if (Buffer != NULL)
386 {
387 RtlZeroMemory(Buffer,
388 sizeof(DRIVE_LAYOUT_INFORMATION));
389 Buffer->PartitionCount = 1;
390 *LayoutInfo = Buffer;
391
392 Status = STATUS_SUCCESS;
393 }
394 else
395 {
396 Status = STATUS_UNSUCCESSFUL;
397 }
398 }
399 else
400 {
401 /* Read the partition table */
402 Status = IoReadPartitionTable(DeviceObject,
403 DiskGeometry.BytesPerSector,
404 TRUE,
405 LayoutInfo);
406 }
407
408 ObDereferenceObject(FileObject);
409
410 return(Status);
411 }
412
413 VOID
414 FASTCALL
415 xHalIoAssignDriveLetters(IN PLOADER_PARAMETER_BLOCK LoaderBlock,
416 IN PSTRING NtDeviceName,
417 OUT PUCHAR NtSystemPath,
418 OUT PSTRING NtSystemPathString)
419 {
420 PDRIVE_LAYOUT_INFORMATION *LayoutArray;
421 PCONFIGURATION_INFORMATION ConfigInfo;
422 OBJECT_ATTRIBUTES ObjectAttributes;
423 IO_STATUS_BLOCK StatusBlock;
424 UNICODE_STRING UnicodeString1;
425 UNICODE_STRING UnicodeString2;
426 HANDLE FileHandle;
427 PWSTR Buffer1;
428 PWSTR Buffer2;
429 ULONG i, j, k;
430 ULONG DiskNumber;
431 ULONG RDisk;
432 NTSTATUS Status;
433 HANDLE hKey;
434 ULONG Length;
435 PKEY_VALUE_PARTIAL_INFORMATION PartialInformation;
436 PREG_DISK_MOUNT_INFO DiskMountInfo;
437 ULONG RDiskCount;
438 UNICODE_STRING BootDevice;
439
440 Status = RtlAnsiStringToUnicodeString(&BootDevice,
441 NtDeviceName,
442 TRUE);
443
444 DPRINT("xHalIoAssignDriveLetters()\n");
445
446 ConfigInfo = IoGetConfigurationInformation();
447
448 RDiskCount = xHalpGetRDiskCount();
449
450 DPRINT("RDiskCount %lu\n", RDiskCount);
451
452 Buffer1 = ExAllocatePoolWithTag(PagedPool,
453 64 * sizeof(WCHAR),
454 TAG_FILE_SYSTEM);
455 if (!Buffer1) return;
456
457 Buffer2 = ExAllocatePoolWithTag(PagedPool,
458 32 * sizeof(WCHAR),
459 TAG_FILE_SYSTEM);
460 if (!Buffer2)
461 {
462 ExFreePoolWithTag(Buffer1, TAG_FILE_SYSTEM);
463 return;
464 }
465
466 PartialInformation = ExAllocatePoolWithTag(PagedPool,
467 sizeof(KEY_VALUE_PARTIAL_INFORMATION) + sizeof(REG_DISK_MOUNT_INFO),
468 TAG_FILE_SYSTEM);
469 if (!PartialInformation)
470 {
471 ExFreePoolWithTag(Buffer2, TAG_FILE_SYSTEM);
472 ExFreePoolWithTag(Buffer1, TAG_FILE_SYSTEM);
473 return;
474 }
475
476 DiskMountInfo = (PREG_DISK_MOUNT_INFO) PartialInformation->Data;
477
478 /* Create or open the 'MountedDevices' key */
479 RtlInitUnicodeString(&UnicodeString1, L"\\Registry\\Machine\\SYSTEM\\MountedDevices");
480 InitializeObjectAttributes(&ObjectAttributes,
481 &UnicodeString1,
482 OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
483 NULL,
484 NULL);
485 Status = ZwCreateKey(&hKey,
486 KEY_ALL_ACCESS,
487 &ObjectAttributes,
488 0,
489 NULL,
490 REG_OPTION_NON_VOLATILE,
491 NULL);
492 if (!NT_SUCCESS(Status))
493 {
494 hKey = NULL;
495 DPRINT("ZwCreateKey failed for %wZ, status=%x\n", &UnicodeString1, Status);
496 }
497
498 /* Create PhysicalDrive links */
499 DPRINT("Physical disk drives: %lu\n", ConfigInfo->DiskCount);
500 for (i = 0; i < ConfigInfo->DiskCount; i++)
501 {
502 swprintf(Buffer1, L"\\Device\\Harddisk%lu\\Partition0", i);
503 RtlInitUnicodeString(&UnicodeString1, Buffer1);
504
505 InitializeObjectAttributes(&ObjectAttributes,
506 &UnicodeString1,
507 0,
508 NULL,
509 NULL);
510
511 Status = ZwOpenFile(&FileHandle,
512 FILE_READ_DATA | SYNCHRONIZE,
513 &ObjectAttributes,
514 &StatusBlock,
515 FILE_SHARE_READ,
516 FILE_SYNCHRONOUS_IO_NONALERT);
517 if (NT_SUCCESS(Status))
518 {
519 ZwClose(FileHandle);
520
521 swprintf(Buffer2, L"\\??\\PhysicalDrive%lu", i);
522 RtlInitUnicodeString(&UnicodeString2, Buffer2);
523
524 DPRINT("Creating link: %S ==> %S\n",
525 Buffer2,
526 Buffer1);
527
528 IoCreateSymbolicLink(&UnicodeString2,
529 &UnicodeString1);
530 }
531 }
532
533 /* Initialize layout array */
534 if (ConfigInfo->DiskCount == 0)
535 goto end_assign_disks;
536 LayoutArray = ExAllocatePoolWithTag(NonPagedPool,
537 ConfigInfo->DiskCount * sizeof(PDRIVE_LAYOUT_INFORMATION), TAG_FILE_SYSTEM);
538 if (!LayoutArray)
539 {
540 ExFreePoolWithTag(PartialInformation, TAG_FILE_SYSTEM);
541 ExFreePoolWithTag(Buffer2, TAG_FILE_SYSTEM);
542 ExFreePoolWithTag(Buffer1, TAG_FILE_SYSTEM);
543 if (hKey) ObCloseHandle(hKey, KernelMode);
544 return;
545 }
546
547 RtlZeroMemory(LayoutArray,
548 ConfigInfo->DiskCount * sizeof(PDRIVE_LAYOUT_INFORMATION));
549 for (i = 0; i < ConfigInfo->DiskCount; i++)
550 {
551 swprintf(Buffer1, L"\\Device\\Harddisk%lu\\Partition0", i);
552 RtlInitUnicodeString(&UnicodeString1, Buffer1);
553
554 Status = xHalQueryDriveLayout(&UnicodeString1, &LayoutArray[i]);
555 if (!NT_SUCCESS(Status))
556 {
557 DbgPrint("xHalQueryDriveLayout() failed (Status = 0x%lx)\n",
558 Status);
559 LayoutArray[i] = NULL;
560 continue;
561 }
562 /* We don't use the RewritePartition value while mounting the disks.
563 * We use this value for marking pre-assigned (registry) partitions.
564 */
565 for (j = 0; j < LayoutArray[i]->PartitionCount; j++)
566 {
567 LayoutArray[i]->PartitionEntry[j].RewritePartition = FALSE;
568 }
569 }
570
571 #ifndef NDEBUG
572 /* Dump layout array */
573 for (i = 0; i < ConfigInfo->DiskCount; i++)
574 {
575 DPRINT("Harddisk %d:\n",
576 i);
577
578 if (LayoutArray[i] == NULL)
579 continue;
580
581 DPRINT("Logical partitions: %d\n",
582 LayoutArray[i]->PartitionCount);
583
584 for (j = 0; j < LayoutArray[i]->PartitionCount; j++)
585 {
586 DPRINT(" %d: nr:%x boot:%x type:%x startblock:%I64u count:%I64u\n",
587 j,
588 LayoutArray[i]->PartitionEntry[j].PartitionNumber,
589 LayoutArray[i]->PartitionEntry[j].BootIndicator,
590 LayoutArray[i]->PartitionEntry[j].PartitionType,
591 LayoutArray[i]->PartitionEntry[j].StartingOffset.QuadPart,
592 LayoutArray[i]->PartitionEntry[j].PartitionLength.QuadPart);
593 }
594 }
595 #endif
596
597 /* Assign pre-assigned (registry) partitions */
598 if (hKey)
599 {
600 for (k = 2; k < 26; k++)
601 {
602 swprintf(Buffer1, DiskMountString, L'A' + k);
603 RtlInitUnicodeString(&UnicodeString1, Buffer1);
604 Status = ZwQueryValueKey(hKey,
605 &UnicodeString1,
606 KeyValuePartialInformation,
607 PartialInformation,
608 sizeof(KEY_VALUE_PARTIAL_INFORMATION) + sizeof(REG_DISK_MOUNT_INFO),
609 &Length);
610 if (NT_SUCCESS(Status) &&
611 PartialInformation->Type == REG_BINARY &&
612 PartialInformation->DataLength == sizeof(REG_DISK_MOUNT_INFO))
613 {
614 DPRINT("%wZ => %08x:%08x%08x\n", &UnicodeString1, DiskMountInfo->Signature,
615 DiskMountInfo->StartingOffset.u.HighPart, DiskMountInfo->StartingOffset.u.LowPart);
616 {
617 BOOLEAN Found = FALSE;
618 for (i = 0; i < ConfigInfo->DiskCount; i++)
619 {
620 DPRINT("%x\n", LayoutArray[i]->Signature);
621 if (LayoutArray[i] &&
622 LayoutArray[i]->Signature &&
623 LayoutArray[i]->Signature == DiskMountInfo->Signature)
624 {
625 for (j = 0; j < LayoutArray[i]->PartitionCount; j++)
626 {
627 if (LayoutArray[i]->PartitionEntry[j].StartingOffset.QuadPart == DiskMountInfo->StartingOffset.QuadPart)
628 {
629 if (IsRecognizedPartition(LayoutArray[i]->PartitionEntry[j].PartitionType) &&
630 LayoutArray[i]->PartitionEntry[j].RewritePartition == FALSE)
631 {
632 swprintf(Buffer2,
633 L"\\Device\\Harddisk%lu\\Partition%lu",
634 i,
635 LayoutArray[i]->PartitionEntry[j].PartitionNumber);
636 RtlInitUnicodeString(&UnicodeString2, Buffer2);
637
638 /* Assign drive */
639 DPRINT(" %wZ\n", &UnicodeString2);
640 Found = HalpAssignDrive(&UnicodeString2,
641 k,
642 DOSDEVICE_DRIVE_FIXED,
643 DiskMountInfo->Signature,
644 DiskMountInfo->StartingOffset,
645 NULL,
646 &BootDevice,
647 NtSystemPath);
648 /* Mark the partition as assigned */
649 LayoutArray[i]->PartitionEntry[j].RewritePartition = TRUE;
650 }
651 break;
652 }
653 }
654 }
655 }
656 if (Found == FALSE)
657 {
658 /* We didn't find a partition for this entry, remove them. */
659 Status = ZwDeleteValueKey(hKey, &UnicodeString1);
660 }
661 }
662 }
663 }
664 }
665
666 /* Assign bootable partition on first harddisk */
667 DPRINT("Assigning bootable primary partition on first harddisk:\n");
668 if (RDiskCount > 0)
669 {
670 Status = xHalpGetDiskNumberFromRDisk(0, &DiskNumber);
671 if (NT_SUCCESS(Status) &&
672 DiskNumber < ConfigInfo->DiskCount &&
673 LayoutArray[DiskNumber])
674 {
675 /* Search for bootable partition */
676 for (j = 0; j < NUM_PARTITION_TABLE_ENTRIES && j < LayoutArray[DiskNumber]->PartitionCount; j++)
677 {
678 if ((LayoutArray[DiskNumber]->PartitionEntry[j].BootIndicator != FALSE) &&
679 IsRecognizedPartition(LayoutArray[DiskNumber]->PartitionEntry[j].PartitionType))
680 {
681 if (LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition == FALSE)
682 {
683 swprintf(Buffer2,
684 L"\\Device\\Harddisk%lu\\Partition%lu",
685 DiskNumber,
686 LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber);
687 RtlInitUnicodeString(&UnicodeString2, Buffer2);
688
689 /* Assign drive */
690 DPRINT(" %wZ\n", &UnicodeString2);
691 HalpAssignDrive(&UnicodeString2,
692 AUTO_DRIVE,
693 DOSDEVICE_DRIVE_FIXED,
694 LayoutArray[DiskNumber]->Signature,
695 LayoutArray[DiskNumber]->PartitionEntry[j].StartingOffset,
696 hKey,
697 &BootDevice,
698 NtSystemPath);
699 /* Mark the partition as assigned */
700 LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition = TRUE;
701 }
702 break;
703 }
704 }
705 }
706 }
707
708 /* Assign remaining primary partitions */
709 DPRINT("Assigning remaining primary partitions:\n");
710 for (RDisk = 0; RDisk < RDiskCount; RDisk++)
711 {
712 Status = xHalpGetDiskNumberFromRDisk(RDisk, &DiskNumber);
713 if (NT_SUCCESS(Status) &&
714 DiskNumber < ConfigInfo->DiskCount &&
715 LayoutArray[DiskNumber])
716 {
717 /* Search for primary partitions */
718 for (j = 0; (j < NUM_PARTITION_TABLE_ENTRIES) && (j < LayoutArray[DiskNumber]->PartitionCount); j++)
719 {
720 if (LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition == FALSE &&
721 IsRecognizedPartition(LayoutArray[DiskNumber]->PartitionEntry[j].PartitionType))
722 {
723 swprintf(Buffer2,
724 L"\\Device\\Harddisk%lu\\Partition%lu",
725 DiskNumber,
726 LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber);
727 RtlInitUnicodeString(&UnicodeString2, Buffer2);
728
729 /* Assign drive */
730 DPRINT(" %wZ\n",
731 &UnicodeString2);
732 HalpAssignDrive(&UnicodeString2,
733 AUTO_DRIVE,
734 DOSDEVICE_DRIVE_FIXED,
735 LayoutArray[DiskNumber]->Signature,
736 LayoutArray[DiskNumber]->PartitionEntry[j].StartingOffset,
737 hKey,
738 &BootDevice,
739 NtSystemPath);
740 /* Mark the partition as assigned */
741 LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition = TRUE;
742 }
743 }
744 }
745 }
746
747 /* Assign extended (logical) partitions */
748 DPRINT("Assigning extended (logical) partitions:\n");
749 for (RDisk = 0; RDisk < RDiskCount; RDisk++)
750 {
751 Status = xHalpGetDiskNumberFromRDisk(RDisk, &DiskNumber);
752 if (NT_SUCCESS(Status) &&
753 DiskNumber < ConfigInfo->DiskCount &&
754 LayoutArray[DiskNumber])
755 {
756 /* Search for extended partitions */
757 for (j = NUM_PARTITION_TABLE_ENTRIES; j < LayoutArray[DiskNumber]->PartitionCount; j++)
758 {
759 if (IsRecognizedPartition(LayoutArray[DiskNumber]->PartitionEntry[j].PartitionType) &&
760 LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition == FALSE &&
761 LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber != 0)
762 {
763 swprintf(Buffer2,
764 L"\\Device\\Harddisk%lu\\Partition%lu",
765 DiskNumber,
766 LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber);
767 RtlInitUnicodeString(&UnicodeString2, Buffer2);
768
769 /* Assign drive */
770 DPRINT(" %wZ\n",
771 &UnicodeString2);
772 HalpAssignDrive(&UnicodeString2,
773 AUTO_DRIVE,
774 DOSDEVICE_DRIVE_FIXED,
775 LayoutArray[DiskNumber]->Signature,
776 LayoutArray[DiskNumber]->PartitionEntry[j].StartingOffset,
777 hKey,
778 &BootDevice,
779 NtSystemPath);
780 /* Mark the partition as assigned */
781 LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition = TRUE;
782 }
783 }
784 }
785 }
786
787 /* Assign remaining primary partitions without an arc-name */
788 DPRINT("Assigning remaining primary partitions:\n");
789 for (DiskNumber = 0; DiskNumber < ConfigInfo->DiskCount; DiskNumber++)
790 {
791 if (LayoutArray[DiskNumber])
792 {
793 /* Search for primary partitions */
794 for (j = 0; (j < NUM_PARTITION_TABLE_ENTRIES) && (j < LayoutArray[DiskNumber]->PartitionCount); j++)
795 {
796 if (LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition == FALSE &&
797 IsRecognizedPartition(LayoutArray[DiskNumber]->PartitionEntry[j].PartitionType))
798 {
799 swprintf(Buffer2,
800 L"\\Device\\Harddisk%lu\\Partition%lu",
801 DiskNumber,
802 LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber);
803 RtlInitUnicodeString(&UnicodeString2, Buffer2);
804
805 /* Assign drive */
806 DPRINT(" %wZ\n",
807 &UnicodeString2);
808 HalpAssignDrive(&UnicodeString2,
809 AUTO_DRIVE,
810 DOSDEVICE_DRIVE_FIXED,
811 LayoutArray[DiskNumber]->Signature,
812 LayoutArray[DiskNumber]->PartitionEntry[j].StartingOffset,
813 hKey,
814 &BootDevice,
815 NtSystemPath);
816 /* Mark the partition as assigned */
817 LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition = TRUE;
818 }
819 }
820 }
821 }
822
823 /* Assign extended (logical) partitions without an arc-name */
824 DPRINT("Assigning extended (logical) partitions:\n");
825 for (DiskNumber = 0; DiskNumber < ConfigInfo->DiskCount; DiskNumber++)
826 {
827 if (LayoutArray[DiskNumber])
828 {
829 /* Search for extended partitions */
830 for (j = NUM_PARTITION_TABLE_ENTRIES; j < LayoutArray[DiskNumber]->PartitionCount; j++)
831 {
832 if (IsRecognizedPartition(LayoutArray[DiskNumber]->PartitionEntry[j].PartitionType) &&
833 LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition == FALSE &&
834 LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber != 0)
835 {
836 swprintf(Buffer2,
837 L"\\Device\\Harddisk%lu\\Partition%lu",
838 DiskNumber,
839 LayoutArray[DiskNumber]->PartitionEntry[j].PartitionNumber);
840 RtlInitUnicodeString(&UnicodeString2, Buffer2);
841
842 /* Assign drive */
843 DPRINT(" %wZ\n",
844 &UnicodeString2);
845 HalpAssignDrive(&UnicodeString2,
846 AUTO_DRIVE,
847 DOSDEVICE_DRIVE_FIXED,
848 LayoutArray[DiskNumber]->Signature,
849 LayoutArray[DiskNumber]->PartitionEntry[j].StartingOffset,
850 hKey,
851 &BootDevice,
852 NtSystemPath);
853 /* Mark the partition as assigned */
854 LayoutArray[DiskNumber]->PartitionEntry[j].RewritePartition = TRUE;
855 }
856 }
857 }
858 }
859
860 /* Assign removable disk drives */
861 DPRINT("Assigning removable disk drives:\n");
862 for (i = 0; i < ConfigInfo->DiskCount; i++)
863 {
864 if (LayoutArray[i])
865 {
866 /* Search for virtual partitions */
867 if (LayoutArray[i]->PartitionCount == 1 &&
868 LayoutArray[i]->PartitionEntry[0].PartitionType == 0)
869 {
870 swprintf(Buffer2, L"\\Device\\Harddisk%lu\\Partition1", i);
871 RtlInitUnicodeString(&UnicodeString2, Buffer2);
872
873 /* Assign drive */
874 DPRINT(" %wZ\n",
875 &UnicodeString2);
876 HalpAssignDrive(&UnicodeString2,
877 AUTO_DRIVE,
878 DOSDEVICE_DRIVE_REMOVABLE,
879 0,
880 RtlConvertLongToLargeInteger(0),
881 hKey,
882 &BootDevice,
883 NtSystemPath);
884 }
885 }
886 }
887
888 /* Free layout array */
889 for (i = 0; i < ConfigInfo->DiskCount; i++)
890 {
891 if (LayoutArray[i] != NULL)
892 ExFreePoolWithTag(LayoutArray[i], TAG_FILE_SYSTEM);
893 }
894 ExFreePoolWithTag(LayoutArray, TAG_FILE_SYSTEM);
895 end_assign_disks:
896
897 /* Assign floppy drives */
898 DPRINT("Floppy drives: %lu\n", ConfigInfo->FloppyCount);
899 for (i = 0; i < ConfigInfo->FloppyCount; i++)
900 {
901 swprintf(Buffer1, L"\\Device\\Floppy%lu", i);
902 RtlInitUnicodeString(&UnicodeString1, Buffer1);
903
904 /* Assign drive letters A: or B: or first free drive letter */
905 DPRINT(" %wZ\n",
906 &UnicodeString1);
907 HalpAssignDrive(&UnicodeString1,
908 (i < 2) ? i : AUTO_DRIVE,
909 DOSDEVICE_DRIVE_REMOVABLE,
910 0,
911 RtlConvertLongToLargeInteger(0),
912 hKey,
913 &BootDevice,
914 NtSystemPath);
915 }
916
917 /* Assign cdrom drives */
918 DPRINT("CD-Rom drives: %lu\n", ConfigInfo->CdRomCount);
919 for (i = 0; i < ConfigInfo->CdRomCount; i++)
920 {
921 swprintf(Buffer1, L"\\Device\\CdRom%lu", i);
922 RtlInitUnicodeString(&UnicodeString1, Buffer1);
923
924 /* Assign first free drive letter */
925 DPRINT(" %wZ\n", &UnicodeString1);
926 HalpAssignDrive(&UnicodeString1,
927 AUTO_DRIVE,
928 DOSDEVICE_DRIVE_CDROM,
929 0,
930 RtlConvertLongToLargeInteger(0),
931 hKey,
932 &BootDevice,
933 NtSystemPath);
934 }
935
936 /* Anything else to do? */
937
938 ExFreePoolWithTag(PartialInformation, TAG_FILE_SYSTEM);
939 ExFreePoolWithTag(Buffer2, TAG_FILE_SYSTEM);
940 ExFreePoolWithTag(Buffer1, TAG_FILE_SYSTEM);
941 if (hKey) ObCloseHandle(hKey, KernelMode);
942 }
943
944 #endif
945
946 /* PRIVATE FUNCTIONS *********************************************************/
947
948 NTSTATUS
949 NTAPI
950 HalpGetFullGeometry(IN PDEVICE_OBJECT DeviceObject,
951 IN PDISK_GEOMETRY Geometry,
952 OUT PULONGLONG RealSectorCount)
953 {
954 PIRP Irp;
955 IO_STATUS_BLOCK IoStatusBlock;
956 PKEVENT Event;
957 NTSTATUS Status;
958 PARTITION_INFORMATION PartitionInfo;
959 PAGED_CODE();
960
961 /* Allocate a non-paged event */
962 Event = ExAllocatePoolWithTag(NonPagedPool,
963 sizeof(KEVENT),
964 TAG_FILE_SYSTEM);
965 if (!Event) return STATUS_INSUFFICIENT_RESOURCES;
966
967 /* Initialize it */
968 KeInitializeEvent(Event, NotificationEvent, FALSE);
969
970 /* Build the IRP */
971 Irp = IoBuildDeviceIoControlRequest(IOCTL_DISK_GET_DRIVE_GEOMETRY,
972 DeviceObject,
973 NULL,
974 0UL,
975 Geometry,
976 sizeof(DISK_GEOMETRY),
977 FALSE,
978 Event,
979 &IoStatusBlock);
980 if (!Irp)
981 {
982 /* Fail, free the event */
983 ExFreePoolWithTag(Event, TAG_FILE_SYSTEM);
984 return STATUS_INSUFFICIENT_RESOURCES;
985 }
986
987 /* Call the driver and check if it's pending */
988 Status = IoCallDriver(DeviceObject, Irp);
989 if (Status == STATUS_PENDING)
990 {
991 /* Wait on the driver */
992 KeWaitForSingleObject(Event, Executive, KernelMode, FALSE, NULL);
993 Status = IoStatusBlock.Status;
994 }
995
996 /* Check if the driver returned success */
997 if(NT_SUCCESS(Status))
998 {
999 /* Build another IRP */
1000 Irp = IoBuildDeviceIoControlRequest(IOCTL_DISK_GET_PARTITION_INFO,
1001 DeviceObject,
1002 NULL,
1003 0UL,
1004 &PartitionInfo,
1005 sizeof(PARTITION_INFORMATION),
1006 FALSE,
1007 Event,
1008 &IoStatusBlock);
1009 if (!Irp)
1010 {
1011 /* Fail, free the event */
1012 ExFreePoolWithTag(Event, TAG_FILE_SYSTEM);
1013 return STATUS_INSUFFICIENT_RESOURCES;
1014 }
1015
1016 /* Reset event */
1017 KeResetEvent(Event);
1018
1019 /* Call the driver and check if it's pending */
1020 Status = IoCallDriver(DeviceObject, Irp);
1021 if (Status == STATUS_PENDING)
1022 {
1023 /* Wait on the driver */
1024 KeWaitForSingleObject(Event, Executive, KernelMode, FALSE, NULL);
1025 Status = IoStatusBlock.Status;
1026 }
1027
1028 /* Check if the driver returned success */
1029 if(NT_SUCCESS(Status))
1030 {
1031 /* Get the number of sectors */
1032 *RealSectorCount = (PartitionInfo.PartitionLength.QuadPart /
1033 Geometry->BytesPerSector);
1034 }
1035 }
1036
1037 /* Free the event and return the Status */
1038 ExFreePoolWithTag(Event, TAG_FILE_SYSTEM);
1039 return Status;
1040 }
1041
1042 BOOLEAN
1043 NTAPI
1044 HalpIsValidPartitionEntry(IN PPARTITION_DESCRIPTOR Entry,
1045 IN ULONGLONG MaxOffset,
1046 IN ULONGLONG MaxSector)
1047 {
1048 ULONGLONG EndingSector;
1049 PAGED_CODE();
1050
1051 /* Unused partitions are considered valid */
1052 if (Entry->PartitionType == PARTITION_ENTRY_UNUSED) return TRUE;
1053
1054 /* Get the last sector of the partition */
1055 EndingSector = GET_STARTING_SECTOR(Entry) + GET_PARTITION_LENGTH(Entry);
1056
1057 /* Check if it's more then the maximum sector */
1058 if (EndingSector > MaxSector)
1059 {
1060 /* Invalid partition */
1061 DPRINT1("FSTUB: entry is invalid\n");
1062 DPRINT1("FSTUB: offset %#08lx\n", GET_STARTING_SECTOR(Entry));
1063 DPRINT1("FSTUB: length %#08lx\n", GET_PARTITION_LENGTH(Entry));
1064 DPRINT1("FSTUB: end %#I64x\n", EndingSector);
1065 DPRINT1("FSTUB: max %#I64x\n", MaxSector);
1066 return FALSE;
1067 }
1068 else if(GET_STARTING_SECTOR(Entry) > MaxOffset)
1069 {
1070 /* Invalid partition */
1071 DPRINT1("FSTUB: entry is invalid\n");
1072 DPRINT1("FSTUB: offset %#08lx\n", GET_STARTING_SECTOR(Entry));
1073 DPRINT1("FSTUB: length %#08lx\n", GET_PARTITION_LENGTH(Entry));
1074 DPRINT1("FSTUB: end %#I64x\n", EndingSector);
1075 DPRINT1("FSTUB: maxOffset %#I64x\n", MaxOffset);
1076 return FALSE;
1077 }
1078
1079 /* It's fine, return success */
1080 return TRUE;
1081 }
1082
1083 VOID
1084 NTAPI
1085 HalpCalculateChsValues(IN PLARGE_INTEGER PartitionOffset,
1086 IN PLARGE_INTEGER PartitionLength,
1087 IN CCHAR ShiftCount,
1088 IN ULONG SectorsPerTrack,
1089 IN ULONG NumberOfTracks,
1090 IN ULONG ConventionalCylinders,
1091 OUT PPARTITION_DESCRIPTOR PartitionDescriptor)
1092 {
1093 LARGE_INTEGER FirstSector, SectorCount;
1094 ULONG LastSector, Remainder, SectorsPerCylinder;
1095 ULONG StartingCylinder, EndingCylinder;
1096 ULONG StartingTrack, EndingTrack;
1097 ULONG StartingSector, EndingSector;
1098 PAGED_CODE();
1099
1100 /* Calculate the number of sectors for each cylinder */
1101 SectorsPerCylinder = SectorsPerTrack * NumberOfTracks;
1102
1103 /* Calculate the first sector, and the sector count */
1104 FirstSector.QuadPart = PartitionOffset->QuadPart >> ShiftCount;
1105 SectorCount.QuadPart = PartitionLength->QuadPart >> ShiftCount;
1106
1107 /* Now calculate the last sector */
1108 LastSector = FirstSector.LowPart + SectorCount.LowPart - 1;
1109
1110 /* Calculate the first and last cylinders */
1111 StartingCylinder = FirstSector.LowPart / SectorsPerCylinder;
1112 EndingCylinder = LastSector / SectorsPerCylinder;
1113
1114 /* Set the default number of cylinders */
1115 if (!ConventionalCylinders) ConventionalCylinders = 1024;
1116
1117 /* Normalize the values */
1118 if (StartingCylinder >= ConventionalCylinders)
1119 {
1120 /* Set the maximum to 1023 */
1121 StartingCylinder = ConventionalCylinders - 1;
1122 }
1123 if (EndingCylinder >= ConventionalCylinders)
1124 {
1125 /* Set the maximum to 1023 */
1126 EndingCylinder = ConventionalCylinders - 1;
1127 }
1128
1129 /* Calculate the starting head and sector that still remain */
1130 Remainder = FirstSector.LowPart % SectorsPerCylinder;
1131 StartingTrack = Remainder / SectorsPerTrack;
1132 StartingSector = Remainder % SectorsPerTrack;
1133
1134 /* Calculate the ending head and sector that still remain */
1135 Remainder = LastSector % SectorsPerCylinder;
1136 EndingTrack = Remainder / SectorsPerTrack;
1137 EndingSector = Remainder % SectorsPerTrack;
1138
1139 /* Set cylinder data for the MSB */
1140 PartitionDescriptor->StartingCylinderMsb = (UCHAR)StartingCylinder;
1141 PartitionDescriptor->EndingCylinderMsb = (UCHAR)EndingCylinder;
1142
1143 /* Set the track data */
1144 PartitionDescriptor->StartingTrack = (UCHAR)StartingTrack;
1145 PartitionDescriptor->EndingTrack = (UCHAR)EndingTrack;
1146
1147 /* Update cylinder data for the LSB */
1148 StartingCylinder = ((StartingSector + 1) & 0x3F) |
1149 ((StartingCylinder >> 2) & 0xC0);
1150 EndingCylinder = ((EndingSector + 1) & 0x3F) |
1151 ((EndingCylinder >> 2) & 0xC0);
1152
1153 /* Set the cylinder data for the LSB */
1154 PartitionDescriptor->StartingCylinderLsb = (UCHAR)StartingCylinder;
1155 PartitionDescriptor->EndingCylinderLsb = (UCHAR)EndingCylinder;
1156 }
1157
1158 VOID
1159 FASTCALL
1160 xHalGetPartialGeometry(IN PDEVICE_OBJECT DeviceObject,
1161 IN PULONG ConventionalCylinders,
1162 IN PLONGLONG DiskSize)
1163 {
1164 PDISK_GEOMETRY DiskGeometry = NULL;
1165 PIO_STATUS_BLOCK IoStatusBlock = NULL;
1166 PKEVENT Event = NULL;
1167 PIRP Irp;
1168 NTSTATUS Status;
1169
1170 /* Set defaults */
1171 *ConventionalCylinders = 0;
1172 *DiskSize = 0;
1173
1174 /* Allocate the structure in nonpaged pool */
1175 DiskGeometry = ExAllocatePoolWithTag(NonPagedPool,
1176 sizeof(DISK_GEOMETRY),
1177 TAG_FILE_SYSTEM);
1178 if (!DiskGeometry) goto Cleanup;
1179
1180 /* Allocate the status block in nonpaged pool */
1181 IoStatusBlock = ExAllocatePoolWithTag(NonPagedPool,
1182 sizeof(IO_STATUS_BLOCK),
1183 TAG_FILE_SYSTEM);
1184 if (!IoStatusBlock) goto Cleanup;
1185
1186 /* Allocate the event in nonpaged pool too */
1187 Event = ExAllocatePoolWithTag(NonPagedPool,
1188 sizeof(KEVENT),
1189 TAG_FILE_SYSTEM);
1190 if (!Event) goto Cleanup;
1191
1192 /* Initialize the event */
1193 KeInitializeEvent(Event, NotificationEvent, FALSE);
1194
1195 /* Build the IRP */
1196 Irp = IoBuildDeviceIoControlRequest(IOCTL_DISK_GET_DRIVE_GEOMETRY,
1197 DeviceObject,
1198 NULL,
1199 0,
1200 DiskGeometry,
1201 sizeof(DISK_GEOMETRY),
1202 FALSE,
1203 Event,
1204 IoStatusBlock);
1205 if (!Irp) goto Cleanup;
1206
1207 /* Now call the driver */
1208 Status = IoCallDriver(DeviceObject, Irp);
1209 if (Status == STATUS_PENDING)
1210 {
1211 /* Wait for it to complete */
1212 KeWaitForSingleObject(Event, Executive, KernelMode, FALSE, NULL);
1213 Status = IoStatusBlock->Status;
1214 }
1215
1216 /* Check driver status */
1217 if (NT_SUCCESS(Status))
1218 {
1219 /* Return the cylinder count */
1220 *ConventionalCylinders = DiskGeometry->Cylinders.LowPart;
1221
1222 /* Make sure it's not larger then 1024 */
1223 if (DiskGeometry->Cylinders.LowPart >= 1024)
1224 {
1225 /* Otherwise, normalize the value */
1226 *ConventionalCylinders = 1024;
1227 }
1228
1229 /* Calculate the disk size */
1230 *DiskSize = DiskGeometry->Cylinders.QuadPart *
1231 DiskGeometry->TracksPerCylinder *
1232 DiskGeometry->SectorsPerTrack *
1233 DiskGeometry->BytesPerSector;
1234 }
1235
1236 Cleanup:
1237 /* Free all the pointers */
1238 if (Event) ExFreePoolWithTag(Event, TAG_FILE_SYSTEM);
1239 if (IoStatusBlock) ExFreePoolWithTag(IoStatusBlock, TAG_FILE_SYSTEM);
1240 if (DiskGeometry) ExFreePoolWithTag(DiskGeometry, TAG_FILE_SYSTEM);
1241 return;
1242 }
1243
1244 VOID
1245 FASTCALL
1246 xHalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
1247 IN ULONG SectorSize,
1248 IN ULONG MbrTypeIdentifier,
1249 OUT PVOID *MbrBuffer)
1250 {
1251 LARGE_INTEGER Offset;
1252 PUCHAR Buffer;
1253 ULONG BufferSize;
1254 KEVENT Event;
1255 IO_STATUS_BLOCK IoStatusBlock;
1256 PIRP Irp;
1257 PPARTITION_DESCRIPTOR PartitionDescriptor;
1258 NTSTATUS Status;
1259 PIO_STACK_LOCATION IoStackLocation;
1260 Offset.QuadPart = 0;
1261
1262 /* Assume failure */
1263 *MbrBuffer = NULL;
1264
1265 /* Normalize the buffer size */
1266 BufferSize = max(SectorSize, 512);
1267
1268 /* Allocate the buffer */
1269 Buffer = ExAllocatePoolWithTag(NonPagedPool,
1270 PAGE_SIZE > BufferSize ?
1271 PAGE_SIZE : BufferSize,
1272 TAG_FILE_SYSTEM);
1273 if (!Buffer) return;
1274
1275 /* Initialize the Event */
1276 KeInitializeEvent(&Event, NotificationEvent, FALSE);
1277
1278 /* Build the IRP */
1279 Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
1280 DeviceObject,
1281 Buffer,
1282 BufferSize,
1283 &Offset,
1284 &Event,
1285 &IoStatusBlock);
1286 if (!Irp)
1287 {
1288 /* Failed */
1289 ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
1290 return;
1291 }
1292
1293 /* Make sure to override volume verification */
1294 IoStackLocation = IoGetNextIrpStackLocation(Irp);
1295 IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
1296
1297 /* Call the driver */
1298 Status = IoCallDriver(DeviceObject, Irp);
1299 if (Status == STATUS_PENDING)
1300 {
1301 /* Wait for completion */
1302 KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
1303 Status = IoStatusBlock.Status;
1304 }
1305
1306 /* Check driver Status */
1307 if (NT_SUCCESS(Status))
1308 {
1309 /* Validate the MBR Signature */
1310 if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
1311 {
1312 /* Failed */
1313 ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
1314 return;
1315 }
1316
1317 /* Get the partition entry */
1318 PartitionDescriptor = (PPARTITION_DESCRIPTOR)
1319 &(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
1320
1321 /* Make sure it's what the caller wanted */
1322 if (PartitionDescriptor->PartitionType != MbrTypeIdentifier)
1323 {
1324 /* It's not, free our buffer */
1325 ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
1326 }
1327 else
1328 {
1329 /* Check if this is a secondary entry */
1330 if (PartitionDescriptor->PartitionType == 0x54)
1331 {
1332 /* Return our buffer, but at sector 63 */
1333 *(PULONG)Buffer = 63;
1334 *MbrBuffer = Buffer;
1335 }
1336 else if (PartitionDescriptor->PartitionType == 0x55)
1337 {
1338 /* EZ Drive, return the buffer directly */
1339 *MbrBuffer = Buffer;
1340 }
1341 else
1342 {
1343 /* Otherwise crash on debug builds */
1344 ASSERT(PartitionDescriptor->PartitionType == 0x55);
1345 }
1346 }
1347 }
1348 }
1349
1350 VOID
1351 NTAPI
1352 FstubFixupEfiPartition(IN PPARTITION_DESCRIPTOR PartitionDescriptor,
1353 IN ULONGLONG MaxOffset)
1354 {
1355 ULONG PartitionMaxOffset, PartitionLength;
1356 PAGED_CODE();
1357
1358 /* Compute partition length (according to MBR entry) */
1359 PartitionMaxOffset = GET_STARTING_SECTOR(PartitionDescriptor) + GET_PARTITION_LENGTH(PartitionDescriptor);
1360 /* In case the partition length goes beyond disk size... */
1361 if (PartitionMaxOffset > MaxOffset)
1362 {
1363 /* Resize partition to its maximum real length */
1364 PartitionLength = (ULONG)(PartitionMaxOffset - GET_STARTING_SECTOR(PartitionDescriptor));
1365 SET_PARTITION_LENGTH(PartitionDescriptor, PartitionLength);
1366 }
1367 }
1368
1369 NTSTATUS
1370 FASTCALL
1371 xHalIoReadPartitionTable(IN PDEVICE_OBJECT DeviceObject,
1372 IN ULONG SectorSize,
1373 IN BOOLEAN ReturnRecognizedPartitions,
1374 IN OUT PDRIVE_LAYOUT_INFORMATION *PartitionBuffer)
1375 {
1376 KEVENT Event;
1377 IO_STATUS_BLOCK IoStatusBlock;
1378 PIRP Irp;
1379 PPARTITION_DESCRIPTOR PartitionDescriptor;
1380 CCHAR Entry;
1381 NTSTATUS Status;
1382 PPARTITION_INFORMATION PartitionInfo;
1383 PUCHAR Buffer = NULL;
1384 ULONG BufferSize = 2048, InputSize;
1385 PDRIVE_LAYOUT_INFORMATION DriveLayoutInfo = NULL;
1386 LONG j = -1, i = -1, k;
1387 DISK_GEOMETRY DiskGeometry;
1388 LONGLONG EndSector, MaxSector, StartOffset;
1389 ULONGLONG MaxOffset;
1390 LARGE_INTEGER Offset, VolumeOffset;
1391 BOOLEAN IsPrimary = TRUE, IsEzDrive = FALSE, MbrFound = FALSE;
1392 BOOLEAN IsValid, IsEmpty = TRUE;
1393 PVOID MbrBuffer;
1394 PIO_STACK_LOCATION IoStackLocation;
1395 PBOOT_SECTOR_INFO BootSectorInfo = (PBOOT_SECTOR_INFO)Buffer;
1396 UCHAR PartitionType;
1397 LARGE_INTEGER HiddenSectors64;
1398 VolumeOffset.QuadPart = Offset.QuadPart = 0;
1399 PAGED_CODE();
1400
1401 /* Allocate the buffer */
1402 *PartitionBuffer = ExAllocatePoolWithTag(NonPagedPool,
1403 BufferSize,
1404 TAG_FILE_SYSTEM);
1405 if (!(*PartitionBuffer)) return STATUS_INSUFFICIENT_RESOURCES;
1406
1407 /* Normalize the buffer size */
1408 InputSize = max(512, SectorSize);
1409
1410 /* Check for EZ Drive */
1411 HalExamineMBR(DeviceObject, InputSize, 0x55, &MbrBuffer);
1412 if (MbrBuffer)
1413 {
1414 /* EZ Drive found, bias the offset */
1415 IsEzDrive = TRUE;
1416 ExFreePoolWithTag(MbrBuffer, TAG_FILE_SYSTEM);
1417 Offset.QuadPart = 512;
1418 }
1419
1420 /* Get drive geometry */
1421 Status = HalpGetFullGeometry(DeviceObject, &DiskGeometry, &MaxOffset);
1422 if (!NT_SUCCESS(Status))
1423 {
1424 ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
1425 *PartitionBuffer = NULL;
1426 return Status;
1427 }
1428
1429 /* Get the end and maximum sector */
1430 EndSector = MaxOffset;
1431 MaxSector = MaxOffset << 1;
1432 DPRINT("FSTUB: MaxOffset = %#I64x, MaxSector = %#I64x\n",
1433 MaxOffset, MaxSector);
1434
1435 /* Allocate our buffer */
1436 Buffer = ExAllocatePoolWithTag(NonPagedPool, InputSize, TAG_FILE_SYSTEM);
1437 if (!Buffer)
1438 {
1439 /* Fail, free the input buffer */
1440 ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
1441 *PartitionBuffer = NULL;
1442 return STATUS_INSUFFICIENT_RESOURCES;
1443 }
1444
1445 /* Start partition loop */
1446 do
1447 {
1448 /* Assume the partition is valid */
1449 IsValid = TRUE;
1450
1451 /* Initialize the event */
1452 KeInitializeEvent(&Event, NotificationEvent, FALSE);
1453
1454 /* Clear the buffer and build the IRP */
1455 RtlZeroMemory(Buffer, InputSize);
1456 Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
1457 DeviceObject,
1458 Buffer,
1459 InputSize,
1460 &Offset,
1461 &Event,
1462 &IoStatusBlock);
1463 if (!Irp)
1464 {
1465 /* Failed */
1466 Status = STATUS_INSUFFICIENT_RESOURCES;
1467 break;
1468 }
1469
1470 /* Make sure to disable volume verification */
1471 IoStackLocation = IoGetNextIrpStackLocation(Irp);
1472 IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
1473
1474 /* Call the driver */
1475 Status = IoCallDriver(DeviceObject, Irp);
1476 if (Status == STATUS_PENDING)
1477 {
1478 /* Wait for completion */
1479 KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
1480 Status = IoStatusBlock.Status;
1481 }
1482
1483 /* Normalize status code and check for failure */
1484 if (Status == STATUS_NO_DATA_DETECTED) Status = STATUS_SUCCESS;
1485 if (!NT_SUCCESS(Status)) break;
1486
1487 /* If we biased for EZ-Drive, unbias now */
1488 if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
1489
1490 /* Make sure this is a valid MBR */
1491 if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
1492 {
1493 /* It's not, fail */
1494 DPRINT1("FSTUB: (IoReadPartitionTable) No 0xaa55 found in "
1495 "partition table %d\n", j + 1);
1496 break;
1497 }
1498
1499 /* At this point we have a valid MBR */
1500 MbrFound = TRUE;
1501
1502 /* Check if we weren't given an offset */
1503 if (!Offset.QuadPart)
1504 {
1505 /* Then read the signature off the disk */
1506 (*PartitionBuffer)->Signature = ((PULONG)Buffer)
1507 [PARTITION_TABLE_OFFSET / 2 - 1];
1508 }
1509
1510 /* Get the partition descriptor array */
1511 PartitionDescriptor = (PPARTITION_DESCRIPTOR)
1512 &(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
1513
1514 /* Start looping partitions */
1515 j++;
1516 DPRINT("FSTUB: Partition Table %d:\n", j);
1517 for (Entry = 1, k = 0; Entry <= 4; Entry++, PartitionDescriptor++)
1518 {
1519 /* Get the partition type */
1520 PartitionType = PartitionDescriptor->PartitionType;
1521
1522 /* Print debug messages */
1523 DPRINT("Partition Entry %d,%d: type %#x %s\n",
1524 j,
1525 Entry,
1526 PartitionType,
1527 (PartitionDescriptor->ActiveFlag) ? "Active" : "");
1528 DPRINT("\tOffset %#08lx for %#08lx Sectors\n",
1529 GET_STARTING_SECTOR(PartitionDescriptor),
1530 GET_PARTITION_LENGTH(PartitionDescriptor));
1531
1532 /* Check whether we're facing a protective MBR */
1533 if (PartitionType == EFI_PMBR_OSTYPE_EFI)
1534 {
1535 /* Partition length might be bigger than disk size */
1536 FstubFixupEfiPartition(PartitionDescriptor,
1537 MaxOffset);
1538 }
1539
1540 /* Make sure that the partition is valid, unless it's the first */
1541 if (!(HalpIsValidPartitionEntry(PartitionDescriptor,
1542 MaxOffset,
1543 MaxSector)) && !(j))
1544 {
1545 /* It's invalid, so fail */
1546 IsValid = FALSE;
1547 break;
1548 }
1549
1550 /* Check if it's a container */
1551 if (IsContainerPartition(PartitionType))
1552 {
1553 /* Increase the count of containers */
1554 if (++k != 1)
1555 {
1556 /* More then one table is invalid */
1557 DPRINT1("FSTUB: Multiple container partitions found in "
1558 "partition table %d\n - table is invalid\n",
1559 j);
1560 IsValid = FALSE;
1561 break;
1562 }
1563 }
1564
1565 /* Check if the partition is supposedly empty */
1566 if (IsEmpty)
1567 {
1568 /* But check if it actually has a start and/or length */
1569 if ((GET_STARTING_SECTOR(PartitionDescriptor)) ||
1570 (GET_PARTITION_LENGTH(PartitionDescriptor)))
1571 {
1572 /* So then it's not really empty */
1573 IsEmpty = FALSE;
1574 }
1575 }
1576
1577 /* Check if the caller wanted only recognized partitions */
1578 if (ReturnRecognizedPartitions)
1579 {
1580 /* Then check if this one is unused, or a container */
1581 if ((PartitionType == PARTITION_ENTRY_UNUSED) ||
1582 IsContainerPartition(PartitionType))
1583 {
1584 /* Skip it, since the caller doesn't want it */
1585 continue;
1586 }
1587 }
1588
1589 /* Increase the structure count and check if they can fit */
1590 if ((sizeof(DRIVE_LAYOUT_INFORMATION) +
1591 (++i * sizeof(PARTITION_INFORMATION))) >
1592 BufferSize)
1593 {
1594 /* Allocate a new buffer that's twice as big */
1595 DriveLayoutInfo = ExAllocatePoolWithTag(NonPagedPool,
1596 BufferSize << 1,
1597 TAG_FILE_SYSTEM);
1598 if (!DriveLayoutInfo)
1599 {
1600 /* Out of memory, unto this extra structure */
1601 --i;
1602 Status = STATUS_INSUFFICIENT_RESOURCES;
1603 break;
1604 }
1605
1606 /* Copy the contents of the old buffer */
1607 RtlMoveMemory(DriveLayoutInfo,
1608 *PartitionBuffer,
1609 BufferSize);
1610
1611 /* Free the old buffer and set this one as the new one */
1612 ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
1613 *PartitionBuffer = DriveLayoutInfo;
1614
1615 /* Double the size */
1616 BufferSize <<= 1;
1617 }
1618
1619 /* Now get the current structure being filled and initialize it */
1620 PartitionInfo = &(*PartitionBuffer)->PartitionEntry[i];
1621 PartitionInfo->PartitionType = PartitionType;
1622 PartitionInfo->RewritePartition = FALSE;
1623
1624 /* Check if we're dealing with a partition that's in use */
1625 if (PartitionType != PARTITION_ENTRY_UNUSED)
1626 {
1627 /* Check if it's bootable */
1628 PartitionInfo->BootIndicator = PartitionDescriptor->
1629 ActiveFlag & 0x80 ?
1630 TRUE : FALSE;
1631
1632 /* Check if its' a container */
1633 if (IsContainerPartition(PartitionType))
1634 {
1635 /* Then don't recognize it and use the volume offset */
1636 PartitionInfo->RecognizedPartition = FALSE;
1637 StartOffset = VolumeOffset.QuadPart;
1638 }
1639 else
1640 {
1641 /* Then recognize it and use the partition offset */
1642 PartitionInfo->RecognizedPartition = TRUE;
1643 StartOffset = Offset.QuadPart;
1644 }
1645
1646 /* Get the starting offset */
1647 PartitionInfo->StartingOffset.QuadPart =
1648 StartOffset +
1649 UInt32x32To64(GET_STARTING_SECTOR(PartitionDescriptor),
1650 SectorSize);
1651
1652 /* Calculate the number of hidden sectors */
1653 HiddenSectors64.QuadPart = (PartitionInfo->
1654 StartingOffset.QuadPart -
1655 StartOffset) /
1656 SectorSize;
1657 PartitionInfo->HiddenSectors = HiddenSectors64.LowPart;
1658
1659 /* Get the partition length */
1660 PartitionInfo->PartitionLength.QuadPart =
1661 UInt32x32To64(GET_PARTITION_LENGTH(PartitionDescriptor),
1662 SectorSize);
1663
1664 /* Get the partition number */
1665 PartitionInfo->PartitionNumber = (!IsContainerPartition(PartitionType)) ? i + 1 : 0;
1666 }
1667 else
1668 {
1669 /* Otherwise, clear all the relevant fields */
1670 PartitionInfo->BootIndicator = FALSE;
1671 PartitionInfo->RecognizedPartition = FALSE;
1672 PartitionInfo->StartingOffset.QuadPart = 0;
1673 PartitionInfo->PartitionLength.QuadPart = 0;
1674 PartitionInfo->HiddenSectors = 0;
1675
1676 PartitionInfo->PartitionNumber = 0;
1677 }
1678 }
1679
1680 /* Finish debug log, and check for failure */
1681 DPRINT("\n");
1682 if (!NT_SUCCESS(Status)) break;
1683
1684 /* Also check if we hit an invalid entry here */
1685 if (!IsValid)
1686 {
1687 /* We did, so break out of the loop minus one entry */
1688 j--;
1689 break;
1690 }
1691
1692 /* Reset the offset */
1693 Offset.QuadPart = 0;
1694
1695 /* Go back to the descriptor array and loop it */
1696 PartitionDescriptor = (PPARTITION_DESCRIPTOR)
1697 &(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
1698 for (Entry = 1; Entry <= 4; Entry++, PartitionDescriptor++)
1699 {
1700 /* Check if this is a container partition, since we skipped them */
1701 if (IsContainerPartition(PartitionDescriptor->PartitionType))
1702 {
1703 /* Get its offset */
1704 Offset.QuadPart = VolumeOffset.QuadPart +
1705 UInt32x32To64(
1706 GET_STARTING_SECTOR(PartitionDescriptor),
1707 SectorSize);
1708
1709 /* If this is a primary partition, this is the volume offset */
1710 if (IsPrimary) VolumeOffset = Offset;
1711
1712 /* Also update the maximum sector */
1713 MaxSector = GET_PARTITION_LENGTH(PartitionDescriptor);
1714 DPRINT1("FSTUB: MaxSector now = %I64d\n", MaxSector);
1715 break;
1716 }
1717 }
1718
1719 /* Loop the next partitions, which are not primary anymore */
1720 IsPrimary = FALSE;
1721 } while (Offset.HighPart | Offset.LowPart);
1722
1723 /* Check if this is a removable device that's probably a super-floppy */
1724 if ((DiskGeometry.MediaType == RemovableMedia) &&
1725 !(j) &&
1726 (MbrFound) &&
1727 (IsEmpty))
1728 {
1729 /* Read the jump bytes to detect super-floppy */
1730 if ((BootSectorInfo->JumpByte[0] == 0xeb) ||
1731 (BootSectorInfo->JumpByte[0] == 0xe9))
1732 {
1733 /* Super floppes don't have typical MBRs, so skip them */
1734 DPRINT1("FSTUB: Jump byte %#x found along with empty partition "
1735 "table - disk is a super floppy and has no valid MBR\n",
1736 BootSectorInfo->JumpByte);
1737 j = -1;
1738 }
1739 }
1740
1741 /* Check if we're still at partition -1 */
1742 if (j == -1)
1743 {
1744 /* The likely cause is the super floppy detection above */
1745 if ((MbrFound) || (DiskGeometry.MediaType == RemovableMedia))
1746 {
1747 /* Print out debugging information */
1748 DPRINT1("FSTUB: Drive %#p has no valid MBR. Make it into a "
1749 "super-floppy\n",
1750 DeviceObject);
1751 DPRINT1("FSTUB: Drive has %I64d sectors and is %#016I64x "
1752 "bytes large\n",
1753 EndSector, EndSector * DiskGeometry.BytesPerSector);
1754
1755 /* We should at least have some sectors */
1756 if (EndSector > 0)
1757 {
1758 /* Get the entry we'll use */
1759 PartitionInfo = &(*PartitionBuffer)->PartitionEntry[0];
1760
1761 /* Fill it out with data for a super-floppy */
1762 PartitionInfo->RewritePartition = FALSE;
1763 PartitionInfo->RecognizedPartition = TRUE;
1764 PartitionInfo->PartitionType = PARTITION_FAT_16;
1765 PartitionInfo->BootIndicator = FALSE;
1766 PartitionInfo->HiddenSectors = 0;
1767 PartitionInfo->StartingOffset.QuadPart = 0;
1768 PartitionInfo->PartitionLength.QuadPart = (EndSector *
1769 DiskGeometry.
1770 BytesPerSector);
1771
1772 /* FIXME: REACTOS HACK */
1773 PartitionInfo->PartitionNumber = 0;
1774
1775 /* Set the signature and set the count back to 0 */
1776 (*PartitionBuffer)->Signature = 1;
1777 i = 0;
1778 }
1779 }
1780 else
1781 {
1782 /* Otherwise, this isn't a super floppy, so set an invalid count */
1783 i = -1;
1784 }
1785 }
1786
1787 /* Set the partition count */
1788 (*PartitionBuffer)->PartitionCount = ++i;
1789
1790 /* If we have no count, delete the signature */
1791 if (!i) (*PartitionBuffer)->Signature = 0;
1792
1793 /* Free the buffer and check for success */
1794 if (Buffer) ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
1795 if (!NT_SUCCESS(Status))
1796 {
1797 ExFreePoolWithTag(*PartitionBuffer, TAG_FILE_SYSTEM);
1798 *PartitionBuffer = NULL;
1799 }
1800
1801 /* Return status */
1802 return Status;
1803 }
1804
1805 NTSTATUS
1806 FASTCALL
1807 xHalIoSetPartitionInformation(IN PDEVICE_OBJECT DeviceObject,
1808 IN ULONG SectorSize,
1809 IN ULONG PartitionNumber,
1810 IN ULONG PartitionType)
1811 {
1812 PIRP Irp;
1813 KEVENT Event;
1814 IO_STATUS_BLOCK IoStatusBlock;
1815 NTSTATUS Status;
1816 LARGE_INTEGER Offset, VolumeOffset;
1817 PUCHAR Buffer = NULL;
1818 ULONG BufferSize;
1819 ULONG i = 0;
1820 ULONG Entry;
1821 PPARTITION_DESCRIPTOR PartitionDescriptor;
1822 BOOLEAN IsPrimary = TRUE, IsEzDrive = FALSE;
1823 PVOID MbrBuffer;
1824 PIO_STACK_LOCATION IoStackLocation;
1825 VolumeOffset.QuadPart = Offset.QuadPart = 0;
1826 PAGED_CODE();
1827
1828 /* Normalize the buffer size */
1829 BufferSize = max(512, SectorSize);
1830
1831 /* Check for EZ Drive */
1832 HalExamineMBR(DeviceObject, BufferSize, 0x55, &MbrBuffer);
1833 if (MbrBuffer)
1834 {
1835 /* EZ Drive found, bias the offset */
1836 IsEzDrive = TRUE;
1837 ExFreePoolWithTag(MbrBuffer, TAG_FILE_SYSTEM);
1838 Offset.QuadPart = 512;
1839 }
1840
1841 /* Allocate our partition buffer */
1842 Buffer = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE, TAG_FILE_SYSTEM);
1843 if (!Buffer) return STATUS_INSUFFICIENT_RESOURCES;
1844
1845 /* Initialize the event we'll use and loop partitions */
1846 KeInitializeEvent(&Event, NotificationEvent, FALSE);
1847 do
1848 {
1849 /* Reset the event since we reuse it */
1850 KeResetEvent(&Event);
1851
1852 /* Build the read IRP */
1853 Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
1854 DeviceObject,
1855 Buffer,
1856 BufferSize,
1857 &Offset,
1858 &Event,
1859 &IoStatusBlock);
1860 if (!Irp)
1861 {
1862 /* Fail */
1863 Status = STATUS_INSUFFICIENT_RESOURCES;
1864 break;
1865 }
1866
1867 /* Make sure to disable volume verification */
1868 IoStackLocation = IoGetNextIrpStackLocation(Irp);
1869 IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
1870
1871 /* Call the driver */
1872 Status = IoCallDriver(DeviceObject, Irp);
1873 if (Status == STATUS_PENDING)
1874 {
1875 /* Wait for completion */
1876 KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
1877 Status = IoStatusBlock.Status;
1878 }
1879
1880 /* Check for failure */
1881 if (!NT_SUCCESS(Status)) break;
1882
1883 /* If we biased for EZ-Drive, unbias now */
1884 if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
1885
1886 /* Make sure this is a valid MBR */
1887 if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
1888 {
1889 /* It's not, fail */
1890 Status = STATUS_BAD_MASTER_BOOT_RECORD;
1891 break;
1892 }
1893
1894 /* Get the partition descriptors and loop them */
1895 PartitionDescriptor = (PPARTITION_DESCRIPTOR)
1896 &(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
1897 for (Entry = 1; Entry <= 4; Entry++, PartitionDescriptor++)
1898 {
1899 /* Check if it's unused or a container partition */
1900 if ((PartitionDescriptor->PartitionType ==
1901 PARTITION_ENTRY_UNUSED) ||
1902 (IsContainerPartition(PartitionDescriptor->PartitionType)))
1903 {
1904 /* Go to the next one */
1905 continue;
1906 }
1907
1908 /* It's a valid partition, so increase the partition count */
1909 if (++i == PartitionNumber)
1910 {
1911 /* We found a match, set the type */
1912 PartitionDescriptor->PartitionType = (UCHAR)PartitionType;
1913
1914 /* Reset the reusable event */
1915 KeResetEvent(&Event);
1916
1917 /* Build the write IRP */
1918 Irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
1919 DeviceObject,
1920 Buffer,
1921 BufferSize,
1922 &Offset,
1923 &Event,
1924 &IoStatusBlock);
1925 if (!Irp)
1926 {
1927 /* Fail */
1928 Status = STATUS_INSUFFICIENT_RESOURCES;
1929 break;
1930 }
1931
1932 /* Disable volume verification */
1933 IoStackLocation = IoGetNextIrpStackLocation(Irp);
1934 IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
1935
1936 /* Call the driver */
1937 Status = IoCallDriver(DeviceObject, Irp);
1938 if (Status == STATUS_PENDING)
1939 {
1940 /* Wait for completion */
1941 KeWaitForSingleObject(&Event,
1942 Executive,
1943 KernelMode,
1944 FALSE,
1945 NULL);
1946 Status = IoStatusBlock.Status;
1947 }
1948
1949 /* We're done, break out of the loop */
1950 break;
1951 }
1952 }
1953
1954 /* If we looped all the partitions, break out */
1955 if (Entry <= NUM_PARTITION_TABLE_ENTRIES) break;
1956
1957 /* Nothing found yet, get the partition array again */
1958 PartitionDescriptor = (PPARTITION_DESCRIPTOR)
1959 &(((PUSHORT)Buffer)[PARTITION_TABLE_OFFSET]);
1960 for (Entry = 1; Entry <= 4; Entry++, PartitionDescriptor++)
1961 {
1962 /* Check if this was a container partition (we skipped these) */
1963 if (IsContainerPartition(PartitionDescriptor->PartitionType))
1964 {
1965 /* Update the partition offset */
1966 Offset.QuadPart = VolumeOffset.QuadPart +
1967 GET_STARTING_SECTOR(PartitionDescriptor) *
1968 SectorSize;
1969
1970 /* If this was the primary partition, update the volume too */
1971 if (IsPrimary) VolumeOffset = Offset;
1972 break;
1973 }
1974 }
1975
1976 /* Check if we already searched all the partitions */
1977 if (Entry > NUM_PARTITION_TABLE_ENTRIES)
1978 {
1979 /* Then we failed to find a good MBR */
1980 Status = STATUS_BAD_MASTER_BOOT_RECORD;
1981 break;
1982 }
1983
1984 /* Loop the next partitions, which are not primary anymore */
1985 IsPrimary = FALSE;
1986 } while (i < PartitionNumber);
1987
1988 /* Everything done, cleanup */
1989 if (Buffer) ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
1990 return Status;
1991 }
1992
1993 NTSTATUS
1994 FASTCALL
1995 xHalIoWritePartitionTable(IN PDEVICE_OBJECT DeviceObject,
1996 IN ULONG SectorSize,
1997 IN ULONG SectorsPerTrack,
1998 IN ULONG NumberOfHeads,
1999 IN PDRIVE_LAYOUT_INFORMATION PartitionBuffer)
2000 {
2001 KEVENT Event;
2002 IO_STATUS_BLOCK IoStatusBlock;
2003 PIRP Irp;
2004 NTSTATUS Status = STATUS_SUCCESS;
2005 ULONG BufferSize;
2006 PUSHORT Buffer;
2007 PPTE Entry;
2008 PPARTITION_TABLE PartitionTable;
2009 LARGE_INTEGER Offset, NextOffset, ExtendedOffset, SectorOffset;
2010 LARGE_INTEGER StartOffset, PartitionLength;
2011 ULONG i, j;
2012 CCHAR k;
2013 BOOLEAN IsEzDrive = FALSE, IsSuperFloppy = FALSE, DoRewrite = FALSE, IsMbr;
2014 ULONG ConventionalCylinders;
2015 LONGLONG DiskSize;
2016 PDISK_LAYOUT DiskLayout = (PDISK_LAYOUT)PartitionBuffer;
2017 PVOID MbrBuffer;
2018 UCHAR PartitionType;
2019 PIO_STACK_LOCATION IoStackLocation;
2020 PPARTITION_INFORMATION PartitionInfo = PartitionBuffer->PartitionEntry;
2021 PPARTITION_INFORMATION TableEntry;
2022 ExtendedOffset.QuadPart = NextOffset.QuadPart = Offset.QuadPart = 0;
2023 PAGED_CODE();
2024
2025 /* Normalize the buffer size */
2026 BufferSize = max(512, SectorSize);
2027
2028 /* Get the partial drive geometry */
2029 xHalGetPartialGeometry(DeviceObject, &ConventionalCylinders, &DiskSize);
2030
2031 /* Check for EZ Drive */
2032 HalExamineMBR(DeviceObject, BufferSize, 0x55, &MbrBuffer);
2033 if (MbrBuffer)
2034 {
2035 /* EZ Drive found, bias the offset */
2036 IsEzDrive = TRUE;
2037 ExFreePoolWithTag(MbrBuffer, TAG_FILE_SYSTEM);
2038 Offset.QuadPart = 512;
2039 }
2040
2041 /* Get the number of bits to shift to multiply by the sector size */
2042 for (k = 0; k < 32; k++) if ((SectorSize >> k) == 1) break;
2043
2044 /* Check if there's only one partition */
2045 if (PartitionBuffer->PartitionCount == 1)
2046 {
2047 /* Check if it has no starting offset or hidden sectors */
2048 if (!(PartitionInfo->StartingOffset.QuadPart) &&
2049 !(PartitionInfo->HiddenSectors))
2050 {
2051 /* Then it's a super floppy */
2052 IsSuperFloppy = TRUE;
2053
2054 /* Which also means it must be non-bootable FAT-16 */
2055 if ((PartitionInfo->PartitionNumber) ||
2056 (PartitionInfo->PartitionType != PARTITION_FAT_16) ||
2057 (PartitionInfo->BootIndicator))
2058 {
2059 /* It's not, so we fail */
2060 return STATUS_INVALID_PARAMETER;
2061 }
2062
2063 /* Check if it needs a rewrite, and disable EZ drive for sure */
2064 if (PartitionInfo->RewritePartition) DoRewrite = TRUE;
2065 IsEzDrive = FALSE;
2066 }
2067 }
2068
2069 /* Count the number of partition tables */
2070 DiskLayout->TableCount = (PartitionBuffer->PartitionCount + 4 - 1) / 4;
2071
2072 /* Allocate our partition buffer */
2073 Buffer = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE, TAG_FILE_SYSTEM);
2074 if (!Buffer) return STATUS_INSUFFICIENT_RESOURCES;
2075
2076 /* Loop the entries */
2077 Entry = (PPTE)&Buffer[PARTITION_TABLE_OFFSET];
2078 for (i = 0; i < DiskLayout->TableCount; i++)
2079 {
2080 /* Set if this is the MBR partition */
2081 IsMbr= (BOOLEAN)!i;
2082
2083 /* Initialize th event */
2084 KeInitializeEvent(&Event, NotificationEvent, FALSE);
2085
2086 /* Build the read IRP */
2087 Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
2088 DeviceObject,
2089 Buffer,
2090 BufferSize,
2091 &Offset,
2092 &Event,
2093 &IoStatusBlock);
2094 if (!Irp)
2095 {
2096 /* Fail */
2097 Status = STATUS_INSUFFICIENT_RESOURCES;
2098 break;
2099 }
2100
2101 /* Make sure to disable volume verification */
2102 IoStackLocation = IoGetNextIrpStackLocation(Irp);
2103 IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
2104
2105 /* Call the driver */
2106 Status = IoCallDriver(DeviceObject, Irp);
2107 if (Status == STATUS_PENDING)
2108 {
2109 /* Wait for completion */
2110 KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
2111 Status = IoStatusBlock.Status;
2112 }
2113
2114 /* Check for failure */
2115 if (!NT_SUCCESS(Status)) break;
2116
2117 /* If we biased for EZ-Drive, unbias now */
2118 if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
2119
2120 /* Check if this is a normal disk */
2121 if (!IsSuperFloppy)
2122 {
2123 /* Set the boot record signature */
2124 Buffer[BOOT_SIGNATURE_OFFSET] = BOOT_RECORD_SIGNATURE;
2125
2126 /* By default, don't require a rewrite */
2127 DoRewrite = FALSE;
2128
2129 /* Check if we don't have an offset */
2130 if (!Offset.QuadPart)
2131 {
2132 /* Check if the signature doesn't match */
2133 if (((PULONG)Buffer)[PARTITION_TABLE_OFFSET / 2 - 1] !=
2134 PartitionBuffer->Signature)
2135 {
2136 /* Then write the signature and now w need a rewrite */
2137 ((PULONG)Buffer)[PARTITION_TABLE_OFFSET / 2 - 1] =
2138 PartitionBuffer->Signature;
2139 DoRewrite = TRUE;
2140 }
2141 }
2142
2143 /* Loop the partition table entries */
2144 PartitionTable = &DiskLayout->PartitionTable[i];
2145 for (j = 0; j < 4; j++)
2146 {
2147 /* Get the current entry and type */
2148 TableEntry = &PartitionTable->PartitionEntry[j];
2149 PartitionType = TableEntry->PartitionType;
2150
2151 /* Check if the entry needs a rewrite */
2152 if (TableEntry->RewritePartition)
2153 {
2154 /* Then we need one too */
2155 DoRewrite = TRUE;
2156
2157 /* Save the type and if it's a bootable partition */
2158 Entry[j].PartitionType = TableEntry->PartitionType;
2159 Entry[j].ActiveFlag = TableEntry->BootIndicator ? 0x80 : 0;
2160
2161 /* Make sure it's used */
2162 if (PartitionType != PARTITION_ENTRY_UNUSED)
2163 {
2164 /* Make sure it's not a container (unless primary) */
2165 if ((IsMbr) || !(IsContainerPartition(PartitionType)))
2166 {
2167 /* Use the partition offset */
2168 StartOffset.QuadPart = Offset.QuadPart;
2169 }
2170 else
2171 {
2172 /* Use the extended logical partition offset */
2173 StartOffset.QuadPart = ExtendedOffset.QuadPart;
2174 }
2175
2176 /* Set the sector offset */
2177 SectorOffset.QuadPart = TableEntry->
2178 StartingOffset.QuadPart -
2179 StartOffset.QuadPart;
2180
2181 /* Now calculate the starting sector */
2182 StartOffset.QuadPart = SectorOffset.QuadPart >> k;
2183 Entry[j].StartingSector = StartOffset.LowPart;
2184
2185 /* As well as the length */
2186 PartitionLength.QuadPart = TableEntry->PartitionLength.
2187 QuadPart >> k;
2188 Entry[j].PartitionLength = PartitionLength.LowPart;
2189
2190 /* Calculate the CHS values */
2191 HalpCalculateChsValues(&TableEntry->StartingOffset,
2192 &TableEntry->PartitionLength,
2193 k,
2194 SectorsPerTrack,
2195 NumberOfHeads,
2196 ConventionalCylinders,
2197 (PPARTITION_DESCRIPTOR)
2198 &Entry[j]);
2199 }
2200 else
2201 {
2202 /* Otherwise set up an empty entry */
2203 Entry[j].StartingSector = 0;
2204 Entry[j].PartitionLength = 0;
2205 Entry[j].StartingTrack = 0;
2206 Entry[j].EndingTrack = 0;
2207 Entry[j].StartingCylinder = 0;
2208 Entry[j].EndingCylinder = 0;
2209 }
2210 }
2211
2212 /* Check if this is a container partition */
2213 if (IsContainerPartition(PartitionType))
2214 {
2215 /* Then update the offset to use */
2216 NextOffset = TableEntry->StartingOffset;
2217 }
2218 }
2219 }
2220
2221 /* Check if we need to write back the buffer */
2222 if (DoRewrite)
2223 {
2224 /* We don't need to do this again */
2225 DoRewrite = FALSE;
2226
2227 /* Initialize the event */
2228 KeInitializeEvent(&Event, NotificationEvent, FALSE);
2229
2230 /* If we unbiased for EZ-Drive, rebias now */
2231 if ((IsEzDrive) && !(Offset.QuadPart)) Offset.QuadPart = 512;
2232
2233 /* Build the write IRP */
2234 Irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
2235 DeviceObject,
2236 Buffer,
2237 BufferSize,
2238 &Offset,
2239 &Event,
2240 &IoStatusBlock);
2241 if (!Irp)
2242 {
2243 /* Fail */
2244 Status = STATUS_INSUFFICIENT_RESOURCES;
2245 break;
2246 }
2247
2248 /* Make sure to disable volume verification */
2249 IoStackLocation = IoGetNextIrpStackLocation(Irp);
2250 IoStackLocation->Flags |= SL_OVERRIDE_VERIFY_VOLUME;
2251
2252 /* Call the driver */
2253 Status = IoCallDriver(DeviceObject, Irp);
2254 if (Status == STATUS_PENDING)
2255 {
2256 /* Wait for completion */
2257 KeWaitForSingleObject(&Event,
2258 Executive,
2259 KernelMode,
2260 FALSE,
2261 NULL);
2262 Status = IoStatusBlock.Status;
2263 }
2264
2265 /* Check for failure */
2266 if (!NT_SUCCESS(Status)) break;
2267
2268 /* If we biased for EZ-Drive, unbias now */
2269 if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
2270 }
2271
2272 /* Update the partition offset and set the extended offset if needed */
2273 Offset = NextOffset;
2274 if (IsMbr) ExtendedOffset = NextOffset;
2275 }
2276
2277 /* If we had a buffer, free it, then return status */
2278 if (Buffer) ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
2279 return Status;
2280 }
2281
2282 /* PUBLIC FUNCTIONS **********************************************************/
2283
2284 /*
2285 * @implemented
2286 */
2287 VOID
2288 FASTCALL
2289 HalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
2290 IN ULONG SectorSize,
2291 IN ULONG MbrTypeIdentifier,
2292 OUT PVOID *MbrBuffer)
2293 {
2294 HALDISPATCH->HalExamineMBR(DeviceObject,
2295 SectorSize,
2296 MbrTypeIdentifier,
2297 MbrBuffer);
2298 }
2299
2300 /*
2301 * @implemented
2302 */
2303 NTSTATUS
2304 FASTCALL
2305 IoReadPartitionTable(IN PDEVICE_OBJECT DeviceObject,
2306 IN ULONG SectorSize,
2307 IN BOOLEAN ReturnRecognizedPartitions,
2308 IN OUT PDRIVE_LAYOUT_INFORMATION *PartitionBuffer)
2309 {
2310 return HALDISPATCH->HalIoReadPartitionTable(DeviceObject,
2311 SectorSize,
2312 ReturnRecognizedPartitions,
2313 PartitionBuffer);
2314 }
2315
2316 /*
2317 * @implemented
2318 */
2319 NTSTATUS
2320 FASTCALL
2321 IoSetPartitionInformation(IN PDEVICE_OBJECT DeviceObject,
2322 IN ULONG SectorSize,
2323 IN ULONG PartitionNumber,
2324 IN ULONG PartitionType)
2325 {
2326 return HALDISPATCH->HalIoSetPartitionInformation(DeviceObject,
2327 SectorSize,
2328 PartitionNumber,
2329 PartitionType);
2330 }
2331
2332 /*
2333 * @implemented
2334 */
2335 NTSTATUS
2336 FASTCALL
2337 IoWritePartitionTable(IN PDEVICE_OBJECT DeviceObject,
2338 IN ULONG SectorSize,
2339 IN ULONG SectorsPerTrack,
2340 IN ULONG NumberOfHeads,
2341 IN PDRIVE_LAYOUT_INFORMATION PartitionBuffer)
2342 {
2343 return HALDISPATCH->HalIoWritePartitionTable(DeviceObject,
2344 SectorSize,
2345 SectorsPerTrack,
2346 NumberOfHeads,
2347 PartitionBuffer);
2348 }
2349
2350 /*
2351 * @implemented
2352 */
2353 VOID
2354 FASTCALL
2355 IoAssignDriveLetters(IN PLOADER_PARAMETER_BLOCK LoaderBlock,
2356 IN PSTRING NtDeviceName,
2357 OUT PUCHAR NtSystemPath,
2358 OUT PSTRING NtSystemPathString)
2359 {
2360 HALDISPATCH->HalIoAssignDriveLetters(LoaderBlock,
2361 NtDeviceName,
2362 NtSystemPath,
2363 NtSystemPathString);
2364 }
2365
2366 /* EOF */
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