[RAMDISK] Remove support for IOCTL_CDROM_GET_LAST_SESSION (useless since r64106)
[reactos.git] / reactos / drivers / storage / class / ramdisk / ramdisk.c
1 /*
2 * PROJECT: Ramdisk Class Driver
3 * LICENSE: BSD - See COPYING.ARM in the top level directory
4 * FILE: drivers/storage/class/ramdisk/ramdisk.c
5 * PURPOSE: Main Driver Routines
6 * PROGRAMMERS: ReactOS Portable Systems Group
7 */
8
9 /* INCLUDES *******************************************************************/
10
11 #include <initguid.h>
12 #include <ntddk.h>
13 #include <ntifs.h>
14 #include <ntdddisk.h>
15 #include <ntddcdrm.h>
16 #include <scsi.h>
17 #include <ntddscsi.h>
18 #include <ntddvol.h>
19 #include <mountdev.h>
20 #include <mountmgr.h>
21 #include <ketypes.h>
22 #include <iotypes.h>
23 #include <rtlfuncs.h>
24 #include <arc/arc.h>
25 #include <reactos/drivers/ntddrdsk.h>
26 #include "../../../filesystems/fs_rec/fs_rec.h"
27 #include <stdio.h>
28 #define NDEBUG
29 #include <debug.h>
30
31 #define DO_XIP 0x00020000
32
33 /* GLOBALS ********************************************************************/
34
35 #define RAMDISK_SESSION_SIZE \
36 FIELD_OFFSET(CDROM_TOC, TrackData) + sizeof(TRACK_DATA)
37
38 #define RAMDISK_TOC_SIZE \
39 FIELD_OFFSET(CDROM_TOC, TrackData) + 2 * sizeof(TRACK_DATA)
40
41 #define TOC_DATA_TRACK (0x04)
42
43 typedef enum _RAMDISK_DEVICE_TYPE
44 {
45 RamdiskBus,
46 RamdiskDrive
47 } RAMDISK_DEVICE_TYPE;
48
49 typedef enum _RAMDISK_DEVICE_STATE
50 {
51 RamdiskStateUninitialized,
52 RamdiskStateStarted,
53 RamdiskStatePaused,
54 RamdiskStateStopped,
55 RamdiskStateRemoved,
56 RamdiskStateBusRemoved,
57 RamdiskStateEnumerated,
58 } RAMDISK_DEVICE_STATE;
59
60 DEFINE_GUID(RamdiskBusInterface,
61 0x5DC52DF0,
62 0x2F8A,
63 0x410F,
64 0x80, 0xE4, 0x05, 0xF8, 0x10, 0xE7, 0xA8, 0x8A);
65
66 typedef struct _RAMDISK_EXTENSION
67 {
68 RAMDISK_DEVICE_TYPE Type;
69 RAMDISK_DEVICE_STATE State;
70 PDEVICE_OBJECT DeviceObject;
71 PDEVICE_OBJECT PhysicalDeviceObject;
72 PDEVICE_OBJECT AttachedDevice;
73 IO_REMOVE_LOCK RemoveLock;
74 UNICODE_STRING DriveDeviceName;
75 UNICODE_STRING BusDeviceName;
76 FAST_MUTEX DiskListLock;
77 LIST_ENTRY DiskList;
78 } RAMDISK_EXTENSION, *PRAMDISK_EXTENSION;
79
80 typedef struct _RAMDISK_BUS_EXTENSION
81 {
82 RAMDISK_EXTENSION;
83 } RAMDISK_BUS_EXTENSION, *PRAMDISK_BUS_EXTENSION;
84
85 typedef struct _RAMDISK_DRIVE_EXTENSION
86 {
87 //
88 // Inherited base class
89 //
90 RAMDISK_EXTENSION;
91
92 //
93 // Data we get from the creator
94 //
95 GUID DiskGuid;
96 UNICODE_STRING GuidString;
97 UNICODE_STRING SymbolicLinkName;
98 ULONG DiskType;
99 RAMDISK_CREATE_OPTIONS DiskOptions;
100 LARGE_INTEGER DiskLength;
101 LONG DiskOffset;
102 WCHAR DriveLetter;
103 ULONG BasePage;
104
105 //
106 // Data we get from the disk
107 //
108 ULONG BytesPerSector;
109 ULONG SectorsPerTrack;
110 ULONG NumberOfHeads;
111 ULONG Cylinders;
112 ULONG HiddenSectors;
113 } RAMDISK_DRIVE_EXTENSION, *PRAMDISK_DRIVE_EXTENSION;
114
115 ULONG MaximumViewLength;
116 ULONG MaximumPerDiskViewLength;
117 ULONG ReportDetectedDevice;
118 ULONG MarkRamdisksAsRemovable;
119 ULONG MinimumViewCount;
120 ULONG DefaultViewCount;
121 ULONG MaximumViewCount;
122 ULONG MinimumViewLength;
123 ULONG DefaultViewLength;
124 UNICODE_STRING DriverRegistryPath;
125 BOOLEAN ExportBootDiskAsCd;
126 BOOLEAN IsWinPEBoot;
127 PDEVICE_OBJECT RamdiskBusFdo;
128
129 /* FUNCTIONS ******************************************************************/
130
131 VOID
132 NTAPI
133 QueryParameters(IN PUNICODE_STRING RegistryPath)
134 {
135 ULONG MinView, DefView, MinViewLength, DefViewLength, MaxViewLength;
136 RTL_QUERY_REGISTRY_TABLE QueryTable[10];
137
138 //
139 // Set defaults
140 //
141 MaximumViewLength = 0x10000000u;
142 MaximumPerDiskViewLength = 0x10000000u;
143 ReportDetectedDevice = 0;
144 MarkRamdisksAsRemovable = 0;
145 MinimumViewCount = 2;
146 DefaultViewCount = 16;
147 MaximumViewCount = 64;
148 MinimumViewLength = 0x10000u;
149 DefaultViewLength = 0x100000u;
150
151 //
152 // Setup the query table and query the registry
153 //
154 RtlZeroMemory(QueryTable, sizeof(QueryTable));
155 QueryTable[0].Flags = 1;
156 QueryTable[0].Name = L"Parameters";
157 QueryTable[1].Flags = 32;
158 QueryTable[1].Name = L"ReportDetectedDevice";
159 QueryTable[1].EntryContext = &ReportDetectedDevice;
160 QueryTable[2].Flags = 32;
161 QueryTable[2].Name = L"MarkRamdisksAsRemovable";
162 QueryTable[2].EntryContext = &MarkRamdisksAsRemovable;
163 QueryTable[3].Flags = 32;
164 QueryTable[3].Name = L"MinimumViewCount";
165 QueryTable[3].EntryContext = &MinimumViewCount;
166 QueryTable[4].Flags = 32;
167 QueryTable[4].Name = L"DefaultViewCount";
168 QueryTable[4].EntryContext = &DefaultViewCount;
169 QueryTable[5].Flags = 32;
170 QueryTable[5].Name = L"MaximumViewCount";
171 QueryTable[5].EntryContext = &MaximumViewCount;
172 QueryTable[6].Flags = 32;
173 QueryTable[6].Name = L"MinimumViewLength";
174 QueryTable[6].EntryContext = &MinimumViewLength;
175 QueryTable[7].Flags = 32;
176 QueryTable[7].Name = L"DefaultViewLength";
177 QueryTable[7].EntryContext = &DefaultViewLength;
178 QueryTable[8].Flags = 32;
179 QueryTable[8].Name = L"MaximumViewLength";
180 QueryTable[8].EntryContext = &MaximumViewLength;
181 QueryTable[9].Flags = 32;
182 QueryTable[9].Name = L"MaximumPerDiskViewLength";
183 QueryTable[9].EntryContext = &MaximumPerDiskViewLength;
184 RtlQueryRegistryValues(RTL_REGISTRY_OPTIONAL,
185 RegistryPath->Buffer,
186 QueryTable,
187 NULL,
188 NULL);
189
190 //
191 // Parse minimum view count, cannot be bigger than 256 or smaller than 2
192 //
193 MinView = MinimumViewCount;
194 if (MinimumViewCount >= 2)
195 {
196 if (MinimumViewCount > 256) MinView = 256;
197 }
198 else
199 {
200 MinView = 2;
201 }
202 MinimumViewCount = MinView;
203
204 //
205 // Parse default view count, cannot be bigger than 256 or smaller than minimum
206 //
207 DefView = DefaultViewCount;
208 if (DefaultViewCount >= MinView)
209 {
210 if (DefaultViewCount > 256) DefView = 256;
211 }
212 else
213 {
214 DefView = MinView;
215 }
216 DefaultViewCount = DefView;
217
218 //
219 // Parse maximum view count, cannot be bigger than 256 or smaller than default
220 //
221 if (MaximumViewCount >= DefView)
222 {
223 if (MaximumViewCount > 256) MaximumViewCount = 256;
224 }
225 else
226 {
227 MaximumViewCount = DefView;
228 }
229
230 //
231 // Parse minimum view length, cannot be bigger than 1GB or smaller than 64KB
232 //
233 MinViewLength = MinimumViewLength;
234 if (MinimumViewLength >= 0x10000)
235 {
236 if (MinimumViewLength > 0x40000000) MinViewLength = 0x40000000u;
237 }
238 else
239 {
240 MinViewLength = 0x10000u;
241 }
242 MinimumViewLength = MinViewLength;
243
244 //
245 // Parse default view length, cannot be bigger than 1GB or smaller than minimum
246 //
247 DefViewLength = DefaultViewLength;
248 if (DefaultViewLength >= MinViewLength)
249 {
250 if (DefaultViewLength > 0x40000000) DefViewLength = 0x40000000u;
251 }
252 else
253 {
254 DefViewLength = MinViewLength;
255 }
256 DefaultViewLength = DefViewLength;
257
258 //
259 // Parse maximum view length, cannot be bigger than 1GB or smaller than default
260 //
261 MaxViewLength = MaximumViewLength;
262 if (MaximumViewLength >= DefViewLength)
263 {
264 if (MaximumViewLength > 0x40000000) MaxViewLength = 0x40000000u;
265 }
266 else
267 {
268 MaxViewLength = DefViewLength;
269 }
270 MaximumViewLength = MaxViewLength;
271
272 //
273 // Parse maximum view length per disk, cannot be smaller than 16MB
274 //
275 if (MaximumPerDiskViewLength >= 0x1000000)
276 {
277 if (MaxViewLength > 0xFFFFFFFF) MaximumPerDiskViewLength = -1;
278 }
279 else
280 {
281 MaximumPerDiskViewLength = 0x1000000u;
282 }
283 }
284
285 PVOID
286 NTAPI
287 RamdiskMapPages(IN PRAMDISK_DRIVE_EXTENSION DeviceExtension,
288 IN LARGE_INTEGER Offset,
289 IN ULONG Length,
290 OUT PULONG OutputLength)
291 {
292 PHYSICAL_ADDRESS PhysicalAddress;
293 PVOID MappedBase;
294 ULONG PageOffset;
295 SIZE_T ActualLength;
296 LARGE_INTEGER ActualOffset;
297 LARGE_INTEGER ActualPages;
298
299 //
300 // We only support boot disks for now
301 //
302 ASSERT(DeviceExtension->DiskType == RAMDISK_BOOT_DISK);
303
304 //
305 // Calculate the actual offset in the drive
306 //
307 ActualOffset.QuadPart = DeviceExtension->DiskOffset + Offset.QuadPart;
308
309 //
310 // Convert to pages
311 //
312 ActualPages.QuadPart = ActualOffset.QuadPart >> PAGE_SHIFT;
313
314 //
315 // Now add the base page
316 //
317 ActualPages.QuadPart = DeviceExtension->BasePage + ActualPages.QuadPart;
318
319 //
320 // Calculate final amount of bytes
321 //
322 PhysicalAddress.QuadPart = ActualPages.QuadPart << PAGE_SHIFT;
323
324 //
325 // Calculate pages spanned for the mapping
326 //
327 ActualLength = ADDRESS_AND_SIZE_TO_SPAN_PAGES(ActualOffset.QuadPart, Length);
328
329 //
330 // And convert this back to bytes
331 //
332 ActualLength <<= PAGE_SHIFT;
333
334 //
335 // Get the offset within the page
336 //
337 PageOffset = BYTE_OFFSET(ActualOffset.QuadPart);
338
339 //
340 // Map the I/O Space from the loader
341 //
342 MappedBase = MmMapIoSpace(PhysicalAddress, ActualLength, MmCached);
343
344 //
345 // Return actual offset within the page as well as the length
346 //
347 if (MappedBase) MappedBase = (PVOID)((ULONG_PTR)MappedBase + PageOffset);
348 *OutputLength = Length;
349 return MappedBase;
350 }
351
352 VOID
353 NTAPI
354 RamdiskUnmapPages(IN PRAMDISK_DRIVE_EXTENSION DeviceExtension,
355 IN PVOID BaseAddress,
356 IN LARGE_INTEGER Offset,
357 IN ULONG Length)
358 {
359 LARGE_INTEGER ActualOffset;
360 SIZE_T ActualLength;
361 ULONG PageOffset;
362
363 //
364 // We only support boot disks for now
365 //
366 ASSERT(DeviceExtension->DiskType == RAMDISK_BOOT_DISK);
367
368 //
369 // Calculate the actual offset in the drive
370 //
371 ActualOffset.QuadPart = DeviceExtension->DiskOffset + Offset.QuadPart;
372
373 //
374 // Calculate pages spanned for the mapping
375 //
376 ActualLength = ADDRESS_AND_SIZE_TO_SPAN_PAGES(ActualOffset.QuadPart, Length);
377
378 //
379 // And convert this back to bytes
380 //
381 ActualLength <<= PAGE_SHIFT;
382
383 //
384 // Get the offset within the page
385 //
386 PageOffset = BYTE_OFFSET(ActualOffset.QuadPart);
387
388 //
389 // Calculate actual base address where we mapped this
390 //
391 BaseAddress = (PVOID)((ULONG_PTR)BaseAddress - PageOffset);
392
393 //
394 // Unmap the I/O space we got from the loader
395 //
396 MmUnmapIoSpace(BaseAddress, ActualLength);
397 }
398
399 NTSTATUS
400 NTAPI
401 RamdiskCreateDiskDevice(IN PRAMDISK_BUS_EXTENSION DeviceExtension,
402 IN PRAMDISK_CREATE_INPUT Input,
403 IN BOOLEAN ValidateOnly,
404 OUT PRAMDISK_DRIVE_EXTENSION *NewDriveExtension)
405 {
406 ULONG BasePage, DiskType, Length;
407 //ULONG ViewCount;
408 NTSTATUS Status;
409 PDEVICE_OBJECT DeviceObject;
410 PRAMDISK_DRIVE_EXTENSION DriveExtension;
411 PVOID Buffer;
412 WCHAR LocalBuffer[16];
413 UNICODE_STRING SymbolicLinkName, DriveString, GuidString, DeviceName;
414 PPACKED_BOOT_SECTOR BootSector;
415 BIOS_PARAMETER_BLOCK BiosBlock;
416 ULONG BytesPerSector, SectorsPerTrack, Heads, BytesRead;
417 PVOID BaseAddress;
418 LARGE_INTEGER CurrentOffset, CylinderSize, DiskLength;
419 ULONG CylinderCount, SizeByCylinders;
420
421 //
422 // Check if we're a boot RAM disk
423 //
424 DiskType = Input->DiskType;
425 if (DiskType >= RAMDISK_BOOT_DISK)
426 {
427 //
428 // Check if we're an ISO
429 //
430 if (DiskType == RAMDISK_BOOT_DISK)
431 {
432 //
433 // NTLDR mounted us somewhere
434 //
435 BasePage = Input->BasePage;
436 if (!BasePage) return STATUS_INVALID_PARAMETER;
437
438 //
439 // Sanitize disk options
440 //
441 Input->Options.Fixed = TRUE;
442 Input->Options.Readonly = Input->Options.ExportAsCd |
443 Input->Options.Readonly;
444 Input->Options.Hidden = FALSE;
445 Input->Options.NoDosDevice = FALSE;
446 Input->Options.NoDriveLetter = IsWinPEBoot ? TRUE : FALSE;
447 }
448 else
449 {
450 //
451 // The only other possibility is a WIM disk
452 //
453 if (DiskType != RAMDISK_WIM_DISK)
454 {
455 //
456 // Fail
457 //
458 return STATUS_INVALID_PARAMETER;
459 }
460
461 //
462 // Read the view count instead
463 //
464 //ViewCount = Input->ViewCount;
465
466 //
467 // Sanitize disk options
468 //
469 Input->Options.Hidden = FALSE;
470 Input->Options.NoDosDevice = FALSE;
471 Input->Options.Readonly = FALSE;
472 Input->Options.NoDriveLetter = TRUE;
473 Input->Options.Fixed = TRUE;
474 }
475
476 //
477 // Are we just validating and returning to the user?
478 //
479 if (ValidateOnly) return STATUS_SUCCESS;
480
481 //
482 // Build the GUID string
483 //
484 Status = RtlStringFromGUID(&Input->DiskGuid, &GuidString);
485 if (!(NT_SUCCESS(Status)) || !(GuidString.Buffer))
486 {
487 //
488 // Fail
489 //
490 Status = STATUS_INSUFFICIENT_RESOURCES;
491 goto FailCreate;
492 }
493
494 //
495 // Allocate our device name
496 //
497 Length = GuidString.Length + 32;
498 Buffer = ExAllocatePoolWithTag(NonPagedPool,
499 Length,
500 'dmaR');
501 if (!Buffer)
502 {
503 //
504 // Fail
505 //
506 Status = STATUS_INSUFFICIENT_RESOURCES;
507 goto FailCreate;
508 }
509
510 //
511 // Build the device name string
512 //
513 DeviceName.Buffer = Buffer;
514 DeviceName.Length = Length - 2;
515 DeviceName.MaximumLength = Length;
516 wcsncpy(Buffer, L"\\Device\\Ramdisk", Length / sizeof(WCHAR));
517 wcsncat(Buffer, GuidString.Buffer, Length / sizeof(WCHAR));
518
519 //
520 // Create the drive device
521 //
522 Status = IoCreateDevice(DeviceExtension->DeviceObject->DriverObject,
523 sizeof(RAMDISK_DRIVE_EXTENSION),
524 &DeviceName,
525 (Input->Options.ExportAsCd) ?
526 FILE_DEVICE_CD_ROM : FILE_DEVICE_DISK,
527 0,
528 0,
529 &DeviceObject);
530 if (!NT_SUCCESS(Status)) goto FailCreate;
531
532 //
533 // Grab the drive extension
534 //
535 DriveExtension = DeviceObject->DeviceExtension;
536
537 //
538 // Check if we need a DOS device
539 //
540 if (!Input->Options.NoDosDevice)
541 {
542 //
543 // Build the symbolic link name
544 //
545 SymbolicLinkName.MaximumLength = GuidString.Length + 36;
546 SymbolicLinkName.Length = GuidString.Length + 34;
547 Buffer = ExAllocatePoolWithTag(NonPagedPool,
548 SymbolicLinkName.MaximumLength,
549 'dmaR');
550 SymbolicLinkName.Buffer = Buffer;
551 if (Buffer)
552 {
553 //
554 // Create it
555 //
556 wcsncpy(Buffer,
557 L"\\GLOBAL??\\Ramdisk",
558 SymbolicLinkName.MaximumLength / sizeof(WCHAR));
559 wcsncat(Buffer,
560 GuidString.Buffer,
561 SymbolicLinkName.MaximumLength / sizeof(WCHAR));
562 Status = IoCreateSymbolicLink(&SymbolicLinkName, &DeviceName);
563 if (!NT_SUCCESS(Status))
564 {
565 //
566 // Nevermind...
567 //
568 Input->Options.NoDosDevice = TRUE;
569 ExFreePool(Buffer);
570 SymbolicLinkName.Buffer = NULL;
571 }
572 }
573 else
574 {
575 //
576 // No DOS device
577 //
578 Input->Options.NoDosDevice = TRUE;
579 }
580
581 //
582 // It this an ISO boot ramdisk?
583 //
584 if (Input->DiskType == RAMDISK_BOOT_DISK)
585 {
586 //
587 // Does it need a drive letter?
588 //
589 if (!Input->Options.NoDriveLetter)
590 {
591 //
592 // Build it and take over the existing symbolic link
593 //
594 _snwprintf(LocalBuffer,
595 30,
596 L"\\DosDevices\\%wc:",
597 Input->DriveLetter);
598 RtlInitUnicodeString(&DriveString, LocalBuffer);
599 IoDeleteSymbolicLink(&DriveString);
600 IoCreateSymbolicLink(&DriveString, &DeviceName);
601
602 //
603 // Save the drive letter
604 //
605 DriveExtension->DriveLetter = Input->DriveLetter;
606 }
607 }
608
609 }
610
611 //
612 // Setup the device object flags
613 //
614 DeviceObject->Flags |= (DO_XIP | DO_POWER_PAGABLE | DO_DIRECT_IO);
615 DeviceObject->AlignmentRequirement = 1;
616
617 //
618 // Build the drive FDO
619 //
620 *NewDriveExtension = DriveExtension;
621 DriveExtension->Type = RamdiskDrive;
622 DiskLength = Input->DiskLength;
623 ExInitializeFastMutex(&DriveExtension->DiskListLock);
624 IoInitializeRemoveLock(&DriveExtension->RemoveLock,
625 'dmaR',
626 0,
627 1);
628 DriveExtension->DriveDeviceName = DeviceName;
629 DriveExtension->SymbolicLinkName = SymbolicLinkName;
630 DriveExtension->GuidString = GuidString;
631 DriveExtension->DiskGuid = Input->DiskGuid;
632 DriveExtension->PhysicalDeviceObject = DeviceObject;
633 DriveExtension->DeviceObject = RamdiskBusFdo;
634 DriveExtension->AttachedDevice = RamdiskBusFdo;
635 DriveExtension->DiskType = Input->DiskType;
636 DriveExtension->DiskOptions = Input->Options;
637 DriveExtension->DiskLength = DiskLength;
638 DriveExtension->DiskOffset = Input->DiskOffset;
639 DriveExtension->BasePage = Input->BasePage;
640 DriveExtension->BytesPerSector = 0;
641 DriveExtension->SectorsPerTrack = 0;
642 DriveExtension->NumberOfHeads = 0;
643
644 //
645 // Make sure we don't free it later
646 //
647 DeviceName.Buffer = NULL;
648 SymbolicLinkName.Buffer = NULL;
649 GuidString.Buffer = NULL;
650
651 //
652 // Check if this is an boot disk, or a registry ram drive
653 //
654 if (!(Input->Options.ExportAsCd) &&
655 (Input->DiskType == RAMDISK_BOOT_DISK))
656 {
657 //
658 // Not an ISO boot, but it's a boot FS -- map it to figure out the
659 // drive settings
660 //
661 CurrentOffset.QuadPart = 0;
662 BaseAddress = RamdiskMapPages(DriveExtension,
663 CurrentOffset,
664 PAGE_SIZE,
665 &BytesRead);
666 if (BaseAddress)
667 {
668 //
669 // Get the data
670 //
671 BootSector = (PPACKED_BOOT_SECTOR)BaseAddress;
672 FatUnpackBios(&BiosBlock, &BootSector->PackedBpb);
673 BytesPerSector = BiosBlock.BytesPerSector;
674 SectorsPerTrack = BiosBlock.SectorsPerTrack;
675 Heads = BiosBlock.Heads;
676
677 //
678 // Save it
679 //
680 DriveExtension->BytesPerSector = BytesPerSector;
681 DriveExtension->SectorsPerTrack = SectorsPerTrack;
682 DriveExtension->NumberOfHeads = Heads;
683
684 //
685 // Unmap now
686 //
687 CurrentOffset.QuadPart = 0;
688 RamdiskUnmapPages(DriveExtension,
689 BaseAddress,
690 CurrentOffset,
691 BytesRead);
692 }
693 else
694 {
695 //
696 // Fail
697 //
698 Status = STATUS_INSUFFICIENT_RESOURCES;
699 goto FailCreate;
700 }
701 }
702
703 //
704 // Check if the drive settings haven't been set yet
705 //
706 if ((DriveExtension->BytesPerSector == 0) ||
707 (DriveExtension->SectorsPerTrack == 0) ||
708 (DriveExtension->NumberOfHeads == 0))
709 {
710 //
711 // Check if this is a CD
712 //
713 if (Input->Options.ExportAsCd)
714 {
715 //
716 // Setup partition parameters default for ISO 9660
717 //
718 DriveExtension->BytesPerSector = 2048;
719 DriveExtension->SectorsPerTrack = 32;
720 DriveExtension->NumberOfHeads = 64;
721 }
722 else
723 {
724 //
725 // Setup partition parameters default for FAT
726 //
727 DriveExtension->BytesPerSector = 512;
728 DriveExtension->SectorsPerTrack = 128;
729 DriveExtension->NumberOfHeads = 16;
730 }
731 }
732
733 //
734 // Calculate the cylinder size
735 //
736 CylinderSize.QuadPart = DriveExtension->BytesPerSector *
737 DriveExtension->SectorsPerTrack *
738 DriveExtension->NumberOfHeads;
739 CylinderCount = DiskLength.QuadPart / CylinderSize.QuadPart;
740 SizeByCylinders = CylinderSize.QuadPart * CylinderCount;
741 DriveExtension->Cylinders = CylinderCount;
742 if ((DiskLength.HighPart > 0) || (SizeByCylinders < DiskLength.LowPart))
743 {
744 //
745 // Align cylinder size up
746 //
747 DriveExtension->Cylinders++;
748 }
749
750 //
751 // Acquire the disk lock
752 //
753 KeEnterCriticalRegion();
754 ExAcquireFastMutex(&DeviceExtension->DiskListLock);
755
756 //
757 // Insert us
758 //
759 InsertTailList(&DeviceExtension->DiskList, &DriveExtension->DiskList);
760
761 //
762 // Release the lock
763 //
764 ExReleaseFastMutex(&DeviceExtension->DiskListLock);
765 KeLeaveCriticalRegion();
766
767 //
768 // Clear init flag
769 //
770 DeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
771 return STATUS_SUCCESS;
772 }
773
774 FailCreate:
775 UNIMPLEMENTED_DBGBREAK();
776 return STATUS_SUCCESS;
777 }
778
779 NTSTATUS
780 NTAPI
781 RamdiskCreateRamdisk(IN PDEVICE_OBJECT DeviceObject,
782 IN PIRP Irp,
783 IN BOOLEAN ValidateOnly)
784 {
785 PRAMDISK_CREATE_INPUT Input;
786 ULONG Length;
787 PRAMDISK_BUS_EXTENSION DeviceExtension;
788 PRAMDISK_DRIVE_EXTENSION DriveExtension;
789 ULONG DiskType;
790 PWCHAR FileNameStart, FileNameEnd;
791 NTSTATUS Status;
792 PIO_STACK_LOCATION IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
793
794 //
795 // Get the device extension and our input data
796 //
797 DeviceExtension = DeviceObject->DeviceExtension;
798 Length = IoStackLocation->Parameters.DeviceIoControl.InputBufferLength;
799 Input = (PRAMDISK_CREATE_INPUT)Irp->AssociatedIrp.SystemBuffer;
800
801 //
802 // Validate input parameters
803 //
804 if ((Length < sizeof(RAMDISK_CREATE_INPUT)) ||
805 (Input->Version != sizeof(RAMDISK_CREATE_INPUT)))
806 {
807 //
808 // Invalid input
809 //
810 return STATUS_INVALID_PARAMETER;
811 }
812
813 //
814 // Validate the disk type
815 //
816 DiskType = Input->DiskType;
817 if (DiskType == RAMDISK_WIM_DISK) return STATUS_INVALID_PARAMETER;
818
819 //
820 // Look at the disk type
821 //
822 if (DiskType == RAMDISK_BOOT_DISK)
823 {
824 //
825 // We only allow this as an early-init boot
826 //
827 if (!KeLoaderBlock) return STATUS_INVALID_PARAMETER;
828
829 //
830 // Save command-line flags
831 //
832 if (ExportBootDiskAsCd) Input->Options.ExportAsCd = TRUE;
833 if (IsWinPEBoot) Input->Options.NoDriveLetter = TRUE;
834 }
835
836 //
837 // Validate the disk type
838 //
839 if ((Input->Options.ExportAsCd) && (DiskType != RAMDISK_BOOT_DISK))
840 {
841 //
842 // If the type isn't CDFS, it has to at least be raw CD
843 //
844 if (DiskType != RAMDISK_MEMORY_MAPPED_DISK) return STATUS_INVALID_PARAMETER;
845 }
846
847 //
848 // Check if this is an actual file
849 //
850 if (DiskType <= RAMDISK_MEMORY_MAPPED_DISK)
851 {
852 //
853 // Validate the file name
854 //
855 FileNameStart = (PWCHAR)((ULONG_PTR)Input + Length);
856 FileNameEnd = Input->FileName + 1;
857 while ((FileNameEnd < FileNameStart) && *(FileNameEnd)) FileNameEnd++;
858 if (FileNameEnd == FileNameStart) return STATUS_INVALID_PARAMETER;
859 }
860
861 //
862 // Create the actual device
863 //
864 Status = RamdiskCreateDiskDevice(DeviceExtension,
865 Input,
866 ValidateOnly,
867 &DriveExtension);
868 if (NT_SUCCESS(Status))
869 {
870 //
871 // Invalidate and set success
872 //
873 IoInvalidateDeviceRelations(DeviceExtension->PhysicalDeviceObject, 0);
874 Irp->IoStatus.Information = STATUS_SUCCESS;
875 }
876
877 //
878 // We're done
879 //
880 return Status;
881 }
882
883 NTSTATUS
884 NTAPI
885 RamdiskGetPartitionInfo(IN PIRP Irp,
886 IN PRAMDISK_DRIVE_EXTENSION DeviceExtension)
887 {
888 NTSTATUS Status;
889 PPARTITION_INFORMATION PartitionInfo;
890 PVOID BaseAddress;
891 LARGE_INTEGER Zero = {{0, 0}};
892 ULONG Length;
893 PIO_STACK_LOCATION IoStackLocation;
894
895 //
896 // Validate the length
897 //
898 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
899 if (IoStackLocation->Parameters.DeviceIoControl.
900 OutputBufferLength < sizeof(PARTITION_INFORMATION))
901 {
902 //
903 // Invalid length
904 //
905 Status = STATUS_BUFFER_TOO_SMALL;
906 Irp->IoStatus.Status = Status;
907 Irp->IoStatus.Information = 0;
908 return Status;
909 }
910
911 //
912 // Map the partition table
913 //
914 BaseAddress = RamdiskMapPages(DeviceExtension, Zero, PAGE_SIZE, &Length);
915 if (!BaseAddress)
916 {
917 //
918 // No memory
919 //
920 Status = STATUS_INSUFFICIENT_RESOURCES;
921 Irp->IoStatus.Status = Status;
922 Irp->IoStatus.Information = 0;
923 return Status;
924 }
925
926 //
927 // Fill out the information
928 //
929 PartitionInfo = Irp->AssociatedIrp.SystemBuffer;
930 PartitionInfo->StartingOffset.QuadPart = DeviceExtension->BytesPerSector;
931 PartitionInfo->PartitionLength.QuadPart = DeviceExtension->BytesPerSector *
932 DeviceExtension->SectorsPerTrack *
933 DeviceExtension->NumberOfHeads *
934 DeviceExtension->Cylinders;
935 PartitionInfo->HiddenSectors = DeviceExtension->HiddenSectors;
936 PartitionInfo->PartitionNumber = 0;
937 PartitionInfo->PartitionType = *((PCHAR)BaseAddress + 450);
938 PartitionInfo->BootIndicator = (DeviceExtension->DiskType ==
939 RAMDISK_BOOT_DISK) ? TRUE: FALSE;
940 PartitionInfo->RecognizedPartition = IsRecognizedPartition(PartitionInfo->
941 PartitionType);
942 PartitionInfo->RewritePartition = FALSE;
943
944 //
945 // Unmap the partition table
946 //
947 RamdiskUnmapPages(DeviceExtension, BaseAddress, Zero, Length);
948
949 //
950 // Done
951 //
952 Irp->IoStatus.Status = STATUS_SUCCESS;
953 Irp->IoStatus.Information = sizeof(PARTITION_INFORMATION);
954 return STATUS_SUCCESS;
955 }
956
957 NTSTATUS
958 NTAPI
959 RamdiskSetPartitionInfo(IN PIRP Irp,
960 IN PRAMDISK_DRIVE_EXTENSION DeviceExtension)
961 {
962 ULONG BytesRead;
963 NTSTATUS Status;
964 PVOID BaseAddress;
965 PIO_STACK_LOCATION Stack;
966 LARGE_INTEGER Zero = {{0, 0}};
967 PPARTITION_INFORMATION PartitionInfo;
968
969 //
970 // First validate input
971 //
972 Stack = IoGetCurrentIrpStackLocation(Irp);
973 if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(PARTITION_INFORMATION))
974 {
975 Status = STATUS_INVALID_PARAMETER;
976 goto SetAndQuit;
977 }
978
979 //
980 // Map to get MBR
981 //
982 BaseAddress = RamdiskMapPages(DeviceExtension, Zero, PAGE_SIZE, &BytesRead);
983 if (BaseAddress == NULL)
984 {
985 Status = STATUS_INSUFFICIENT_RESOURCES;
986 goto SetAndQuit;
987 }
988
989 //
990 // Set the new partition type
991 // On partition 0, field system indicator
992 //
993 PartitionInfo = (PPARTITION_INFORMATION)Irp->AssociatedIrp.SystemBuffer;
994 *((PCHAR)BaseAddress + 450) = PartitionInfo->PartitionType;
995
996 //
997 // And unmap
998 //
999 RamdiskUnmapPages(DeviceExtension, BaseAddress, Zero, BytesRead);
1000 Status = STATUS_SUCCESS;
1001
1002 SetAndQuit:
1003 Irp->IoStatus.Status = Status;
1004 Irp->IoStatus.Information = 0;
1005 return Status;
1006 }
1007
1008 VOID
1009 NTAPI
1010 RamdiskWorkerThread(IN PDEVICE_OBJECT DeviceObject,
1011 IN PVOID Context)
1012 {
1013 PRAMDISK_BUS_EXTENSION DeviceExtension;
1014 NTSTATUS Status;
1015 PIO_STACK_LOCATION IoStackLocation;
1016 PIRP Irp = Context;
1017
1018 //
1019 // Get the stack location
1020 //
1021 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
1022
1023 //
1024 // Free the work item
1025 //
1026 IoFreeWorkItem(Irp->Tail.Overlay.DriverContext[0]);
1027
1028 //
1029 // Grab the device extension and lock it
1030 //
1031 DeviceExtension = DeviceObject->DeviceExtension;
1032 Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Irp);
1033 if (NT_SUCCESS(Status))
1034 {
1035 //
1036 // Discriminate by major code
1037 //
1038 switch (IoStackLocation->MajorFunction)
1039 {
1040 //
1041 // Device control
1042 //
1043 case IRP_MJ_DEVICE_CONTROL:
1044
1045 //
1046 // Let's take a look at the IOCTL
1047 //
1048 switch (IoStackLocation->Parameters.DeviceIoControl.IoControlCode)
1049 {
1050 //
1051 // Ramdisk create request
1052 //
1053 case FSCTL_CREATE_RAM_DISK:
1054
1055 //
1056 // This time we'll do it for real
1057 //
1058 Status = RamdiskCreateRamdisk(DeviceObject, Irp, FALSE);
1059 break;
1060
1061 case IOCTL_DISK_SET_PARTITION_INFO:
1062
1063 Status = RamdiskSetPartitionInfo(Irp, (PRAMDISK_DRIVE_EXTENSION)DeviceExtension);
1064 break;
1065
1066 case IOCTL_DISK_GET_DRIVE_LAYOUT:
1067
1068 UNIMPLEMENTED_DBGBREAK("Get drive layout request\n");
1069 break;
1070
1071 case IOCTL_DISK_GET_PARTITION_INFO:
1072
1073 Status = RamdiskGetPartitionInfo(Irp, (PRAMDISK_DRIVE_EXTENSION)DeviceExtension);
1074 break;
1075
1076 default:
1077
1078 UNIMPLEMENTED_DBGBREAK("Invalid request\n");
1079 break;
1080 }
1081
1082 //
1083 // We're here
1084 //
1085 break;
1086
1087 //
1088 // Read or write request
1089 //
1090 case IRP_MJ_READ:
1091 case IRP_MJ_WRITE:
1092
1093 UNIMPLEMENTED_DBGBREAK("Read/Write request\n");
1094 break;
1095
1096 //
1097 // Internal request (SCSI?)
1098 //
1099 case IRP_MJ_INTERNAL_DEVICE_CONTROL:
1100
1101 UNIMPLEMENTED_DBGBREAK("SCSI request\n");
1102 break;
1103
1104 //
1105 // Flush request
1106 //
1107 case IRP_MJ_FLUSH_BUFFERS:
1108
1109 UNIMPLEMENTED_DBGBREAK("Flush request\n");
1110 break;
1111
1112 //
1113 // Anything else
1114 //
1115 default:
1116
1117 UNIMPLEMENTED_DBGBREAK("Invalid request: %lx\n", IoStackLocation->MajorFunction);
1118 break;
1119 }
1120
1121 //
1122 // Complete the I/O
1123 //
1124 IoReleaseRemoveLock(&DeviceExtension->RemoveLock, Irp);
1125 Irp->IoStatus.Status = Status;
1126 Irp->IoStatus.Information = 0;
1127 IoCompleteRequest(Irp, IO_DISK_INCREMENT);
1128 return;
1129 }
1130
1131 //
1132 // Fail the I/O
1133 //
1134 Irp->IoStatus.Status = Status;
1135 Irp->IoStatus.Information = 0;
1136 IoCompleteRequest(Irp, IO_NO_INCREMENT);
1137 }
1138
1139 NTSTATUS
1140 NTAPI
1141 SendIrpToThread(IN PDEVICE_OBJECT DeviceObject,
1142 IN PIRP Irp)
1143 {
1144 PIO_WORKITEM WorkItem;
1145
1146 //
1147 // Mark the IRP pending
1148 //
1149 IoMarkIrpPending(Irp);
1150
1151 //
1152 // Allocate a work item
1153 //
1154 WorkItem = IoAllocateWorkItem(DeviceObject);
1155 if (WorkItem)
1156 {
1157 //
1158 // Queue it up
1159 //
1160 Irp->Tail.Overlay.DriverContext[0] = WorkItem;
1161 IoQueueWorkItem(WorkItem, RamdiskWorkerThread, DelayedWorkQueue, Irp);
1162 return STATUS_PENDING;
1163 }
1164 else
1165 {
1166 //
1167 // Fail
1168 //
1169 return STATUS_INSUFFICIENT_RESOURCES;
1170 }
1171 }
1172
1173 NTSTATUS
1174 NTAPI
1175 RamdiskReadWriteReal(IN PIRP Irp,
1176 IN PRAMDISK_DRIVE_EXTENSION DeviceExtension)
1177 {
1178 PMDL Mdl;
1179 PVOID CurrentBase, SystemVa, BaseAddress;
1180 PIO_STACK_LOCATION IoStackLocation;
1181 LARGE_INTEGER CurrentOffset;
1182 ULONG BytesRead, BytesLeft, CopyLength;
1183 PVOID Source, Destination;
1184 NTSTATUS Status;
1185
1186 //
1187 // Get the MDL and check if it's mapped
1188 //
1189 Mdl = Irp->MdlAddress;
1190 if (Mdl->MdlFlags & (MDL_MAPPED_TO_SYSTEM_VA | MDL_SOURCE_IS_NONPAGED_POOL))
1191 {
1192 //
1193 // Use the mapped address
1194 //
1195 SystemVa = Mdl->MappedSystemVa;
1196 }
1197 else
1198 {
1199 //
1200 // Map it ourselves
1201 //
1202 SystemVa = MmMapLockedPagesSpecifyCache(Mdl,
1203 0,
1204 MmCached,
1205 NULL,
1206 0,
1207 NormalPagePriority);
1208 }
1209
1210 //
1211 // Make sure we were able to map it
1212 //
1213 CurrentBase = SystemVa;
1214 if (!SystemVa) return STATUS_INSUFFICIENT_RESOURCES;
1215
1216 //
1217 // Initialize default
1218 //
1219 Irp->IoStatus.Information = 0;
1220
1221 //
1222 // Get the I/O Stack Location and capture the data
1223 //
1224 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
1225 CurrentOffset = IoStackLocation->Parameters.Read.ByteOffset;
1226 BytesLeft = IoStackLocation->Parameters.Read.Length;
1227 if (!BytesLeft) return STATUS_INVALID_PARAMETER;
1228
1229 //
1230 // Do the copy loop
1231 //
1232 while (TRUE)
1233 {
1234 //
1235 // Map the pages
1236 //
1237 BaseAddress = RamdiskMapPages(DeviceExtension,
1238 CurrentOffset,
1239 BytesLeft,
1240 &BytesRead);
1241 if (!BaseAddress) return STATUS_INSUFFICIENT_RESOURCES;
1242
1243 //
1244 // Update our lengths
1245 //
1246 Irp->IoStatus.Information += BytesRead;
1247 CopyLength = BytesRead;
1248
1249 //
1250 // Check if this was a read or write
1251 //
1252 Status = STATUS_SUCCESS;
1253 if (IoStackLocation->MajorFunction == IRP_MJ_READ)
1254 {
1255 //
1256 // Set our copy parameters
1257 //
1258 Destination = CurrentBase;
1259 Source = BaseAddress;
1260 goto DoCopy;
1261 }
1262 else if (IoStackLocation->MajorFunction == IRP_MJ_WRITE)
1263 {
1264 //
1265 // Set our copy parameters
1266 //
1267 Destination = BaseAddress;
1268 Source = CurrentBase;
1269 DoCopy:
1270 //
1271 // Copy the data
1272 //
1273 RtlCopyMemory(Destination, Source, CopyLength);
1274 }
1275 else
1276 {
1277 //
1278 // Prepare us for failure
1279 //
1280 BytesLeft = CopyLength;
1281 Status = STATUS_INVALID_PARAMETER;
1282 }
1283
1284 //
1285 // Unmap the pages
1286 //
1287 RamdiskUnmapPages(DeviceExtension,
1288 BaseAddress,
1289 CurrentOffset,
1290 BytesRead);
1291
1292 //
1293 // Update offset and bytes left
1294 //
1295 BytesLeft -= BytesRead;
1296 CurrentOffset.QuadPart += BytesRead;
1297 CurrentBase = (PVOID)((ULONG_PTR)CurrentBase + BytesRead);
1298
1299 //
1300 // Check if we're done
1301 //
1302 if (!BytesLeft) return Status;
1303 }
1304 }
1305
1306 NTSTATUS
1307 NTAPI
1308 RamdiskOpenClose(IN PDEVICE_OBJECT DeviceObject,
1309 IN PIRP Irp)
1310 {
1311 //
1312 // Complete the IRP
1313 //
1314 Irp->IoStatus.Information = 1;
1315 Irp->IoStatus.Status = STATUS_SUCCESS;
1316 IoCompleteRequest(Irp, IO_NO_INCREMENT);
1317 return STATUS_SUCCESS;
1318 }
1319
1320 NTSTATUS
1321 NTAPI
1322 RamdiskReadWrite(IN PDEVICE_OBJECT DeviceObject,
1323 IN PIRP Irp)
1324 {
1325 PRAMDISK_DRIVE_EXTENSION DeviceExtension;
1326 //ULONG Length;
1327 //LARGE_INTEGER ByteOffset;
1328 PIO_STACK_LOCATION IoStackLocation;
1329 NTSTATUS Status, ReturnStatus;
1330
1331 //
1332 // Get the device extension and make sure this isn't a bus
1333 //
1334 DeviceExtension = DeviceObject->DeviceExtension;
1335 if (DeviceExtension->Type == RamdiskBus)
1336 {
1337 //
1338 // Fail
1339 //
1340 Status = STATUS_INVALID_DEVICE_REQUEST;
1341 goto Complete;
1342 }
1343
1344 //
1345 // Capture parameters
1346 //
1347 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
1348 //Length = IoStackLocation->Parameters.Read.Length;
1349 //ByteOffset = IoStackLocation->Parameters.Read.ByteOffset;
1350
1351 //
1352 // FIXME: Validate offset
1353 //
1354
1355 //
1356 // FIXME: Validate sector
1357 //
1358
1359 //
1360 // Validate write
1361 //
1362 if ((IoStackLocation->MajorFunction == IRP_MJ_WRITE) &&
1363 (DeviceExtension->DiskOptions.Readonly))
1364 {
1365 //
1366 // Fail, this is read-only
1367 //
1368 Status = STATUS_MEDIA_WRITE_PROTECTED;
1369 goto Complete;
1370 }
1371
1372 //
1373 // See if we want to do this sync or async
1374 //
1375 if (DeviceExtension->DiskType > RAMDISK_MEMORY_MAPPED_DISK)
1376 {
1377 //
1378 // Do it sync
1379 //
1380 Status = RamdiskReadWriteReal(Irp, DeviceExtension);
1381 goto Complete;
1382 }
1383
1384 //
1385 // Queue it to the worker
1386 //
1387 Status = SendIrpToThread(DeviceObject, Irp);
1388 ReturnStatus = STATUS_PENDING;
1389
1390 //
1391 // Check if we're pending or not
1392 //
1393 if (Status != STATUS_PENDING)
1394 {
1395 Complete:
1396 //
1397 // Complete the IRP
1398 //
1399 Irp->IoStatus.Status = Status;
1400 IoCompleteRequest(Irp, IO_DISK_INCREMENT);
1401 ReturnStatus = Status;
1402 }
1403
1404 //
1405 // Return to caller
1406 //
1407 return ReturnStatus;
1408 }
1409
1410 NTSTATUS
1411 NTAPI
1412 RamdiskDeviceControl(IN PDEVICE_OBJECT DeviceObject,
1413 IN PIRP Irp)
1414 {
1415 NTSTATUS Status;
1416 PIO_STACK_LOCATION IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
1417 PRAMDISK_BUS_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
1418 PRAMDISK_DRIVE_EXTENSION DriveExtension = (PVOID)DeviceExtension;
1419 ULONG Information;
1420 PCDROM_TOC Toc;
1421 PDISK_GEOMETRY DiskGeometry;
1422
1423 //
1424 // Grab the remove lock
1425 //
1426 Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Irp);
1427 if (!NT_SUCCESS(Status))
1428 {
1429 //
1430 // Fail the IRP
1431 //
1432 Irp->IoStatus.Information = 0;
1433 Irp->IoStatus.Status = Status;
1434 IoCompleteRequest(Irp, IO_NO_INCREMENT);
1435 return Status;
1436 }
1437
1438 //
1439 // Setup some defaults
1440 //
1441 Status = STATUS_INVALID_DEVICE_REQUEST;
1442 Information = 0;
1443
1444 //
1445 // Check if this is an bus device or the drive
1446 //
1447 if (DeviceExtension->Type == RamdiskBus)
1448 {
1449 //
1450 // Check what the request is
1451 //
1452 switch (IoStackLocation->Parameters.DeviceIoControl.IoControlCode)
1453 {
1454 //
1455 // Request to create a ramdisk
1456 //
1457 case FSCTL_CREATE_RAM_DISK:
1458
1459 //
1460 // Do it
1461 //
1462 Status = RamdiskCreateRamdisk(DeviceObject, Irp, TRUE);
1463 if (!NT_SUCCESS(Status)) goto CompleteRequest;
1464 break;
1465
1466 default:
1467
1468 //
1469 // We don't handle anything else yet
1470 //
1471 UNIMPLEMENTED_DBGBREAK();
1472 }
1473 }
1474 else
1475 {
1476 //
1477 // Check what the request is
1478 //
1479 switch (IoStackLocation->Parameters.DeviceIoControl.IoControlCode)
1480 {
1481 case IOCTL_DISK_CHECK_VERIFY:
1482 case IOCTL_STORAGE_CHECK_VERIFY:
1483 case IOCTL_STORAGE_CHECK_VERIFY2:
1484 case IOCTL_CDROM_CHECK_VERIFY:
1485
1486 UNIMPLEMENTED_DBGBREAK();
1487 break;
1488
1489 case IOCTL_STORAGE_GET_MEDIA_TYPES:
1490 case IOCTL_DISK_GET_MEDIA_TYPES:
1491 case IOCTL_DISK_GET_DRIVE_GEOMETRY:
1492 case IOCTL_CDROM_GET_DRIVE_GEOMETRY:
1493
1494 //
1495 // Validate the length
1496 //
1497 if (IoStackLocation->Parameters.DeviceIoControl.
1498 OutputBufferLength < sizeof(DISK_GEOMETRY))
1499 {
1500 //
1501 // Invalid length
1502 //
1503 Status = STATUS_BUFFER_TOO_SMALL;
1504 break;
1505 }
1506
1507 //
1508 // Fill it out
1509 //
1510 DiskGeometry = Irp->AssociatedIrp.SystemBuffer;
1511 DiskGeometry->Cylinders.QuadPart = DriveExtension->Cylinders;
1512 DiskGeometry->BytesPerSector = DriveExtension->BytesPerSector;
1513 DiskGeometry->SectorsPerTrack = DriveExtension->SectorsPerTrack;
1514 DiskGeometry->TracksPerCylinder = DriveExtension->NumberOfHeads;
1515 DiskGeometry->MediaType = DriveExtension->DiskOptions.Fixed ?
1516 FixedMedia : RemovableMedia;
1517
1518 //
1519 // We're done
1520 //
1521 Status = STATUS_SUCCESS;
1522 Information = sizeof(DISK_GEOMETRY);
1523 break;
1524
1525 case IOCTL_CDROM_READ_TOC:
1526
1527 //
1528 // Validate the length
1529 //
1530 if (IoStackLocation->Parameters.DeviceIoControl.
1531 OutputBufferLength < sizeof(CDROM_TOC))
1532 {
1533 //
1534 // Invalid length
1535 //
1536 Status = STATUS_BUFFER_TOO_SMALL;
1537 break;
1538 }
1539
1540 //
1541 // Clear the TOC
1542 //
1543 Toc = Irp->AssociatedIrp.SystemBuffer;
1544 RtlZeroMemory(Toc, sizeof(CDROM_TOC));
1545
1546 //
1547 // Fill it out
1548 //
1549 Toc->Length[0] = 0;
1550 Toc->Length[1] = RAMDISK_TOC_SIZE - sizeof(Toc->Length);
1551 Toc->FirstTrack = 1;
1552 Toc->LastTrack = 1;
1553 Toc->TrackData[0].Adr = 1;
1554 Toc->TrackData[0].Control = TOC_DATA_TRACK;
1555 Toc->TrackData[0].TrackNumber = 1;
1556
1557 //
1558 // We're done
1559 //
1560 Status = STATUS_SUCCESS;
1561 Information = RAMDISK_TOC_SIZE;
1562 break;
1563
1564 case IOCTL_DISK_SET_PARTITION_INFO:
1565
1566 Status = RamdiskSetPartitionInfo(Irp, DriveExtension);
1567 break;
1568
1569 case IOCTL_DISK_GET_PARTITION_INFO:
1570
1571 //
1572 // Validate the length
1573 //
1574 if (IoStackLocation->Parameters.DeviceIoControl.
1575 OutputBufferLength < sizeof(PARTITION_INFORMATION))
1576 {
1577 //
1578 // Invalid length
1579 //
1580 Status = STATUS_BUFFER_TOO_SMALL;
1581 break;
1582 }
1583
1584 //
1585 // Check if we need to do this sync or async
1586 //
1587 if (DriveExtension->DiskType > RAMDISK_MEMORY_MAPPED_DISK)
1588 {
1589 //
1590 // Call the helper function
1591 //
1592 Status = RamdiskGetPartitionInfo(Irp, DriveExtension);
1593 }
1594 else
1595 {
1596 //
1597 // Do it asynchronously later
1598 //
1599 goto CallWorker;
1600 }
1601
1602 //
1603 // We're done
1604 //
1605 Information = Irp->IoStatus.Information;
1606 break;
1607
1608 case IOCTL_DISK_GET_DRIVE_LAYOUT:
1609
1610 UNIMPLEMENTED_DBGBREAK();
1611 break;
1612
1613 case IOCTL_DISK_GET_LENGTH_INFO:
1614
1615 UNIMPLEMENTED_DBGBREAK();
1616 break;
1617
1618 case IOCTL_DISK_IS_WRITABLE:
1619
1620 UNIMPLEMENTED_DBGBREAK();
1621 break;
1622
1623 case IOCTL_SCSI_MINIPORT:
1624
1625 UNIMPLEMENTED_DBGBREAK();
1626 break;
1627
1628 case IOCTL_STORAGE_QUERY_PROPERTY:
1629
1630 UNIMPLEMENTED_DBGBREAK();
1631 break;
1632
1633 case IOCTL_MOUNTDEV_QUERY_UNIQUE_ID:
1634
1635 UNIMPLEMENTED_DBGBREAK();
1636 break;
1637
1638 case IOCTL_MOUNTDEV_QUERY_STABLE_GUID:
1639
1640 UNIMPLEMENTED_DBGBREAK();
1641 break;
1642
1643 case IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS:
1644
1645 UNIMPLEMENTED_DBGBREAK();
1646 break;
1647
1648 case IOCTL_VOLUME_SET_GPT_ATTRIBUTES:
1649
1650 UNIMPLEMENTED_DBGBREAK();
1651 break;
1652
1653 case IOCTL_VOLUME_GET_GPT_ATTRIBUTES:
1654
1655 UNIMPLEMENTED_DBGBREAK();
1656 break;
1657
1658 case IOCTL_VOLUME_OFFLINE:
1659
1660 UNIMPLEMENTED_DBGBREAK();
1661 break;
1662
1663 default:
1664
1665 //
1666 // Drive code not emulated
1667 //
1668 DPRINT1("IOCTL: %lx\n", IoStackLocation->Parameters.DeviceIoControl.IoControlCode);
1669 break;
1670 }
1671
1672 //
1673 // If requests drop down here, we just return them complete them
1674 //
1675 goto CompleteRequest;
1676 }
1677
1678 //
1679 // Queue the request to our worker thread
1680 //
1681 CallWorker:
1682 Status = SendIrpToThread(DeviceObject, Irp);
1683
1684 CompleteRequest:
1685 //
1686 // Release the lock
1687 //
1688 IoReleaseRemoveLock(&DeviceExtension->RemoveLock, Irp);
1689 if (Status != STATUS_PENDING)
1690 {
1691 //
1692 // Complete the request
1693 //
1694 Irp->IoStatus.Status = Status;
1695 Irp->IoStatus.Information = Information;
1696 IoCompleteRequest(Irp, IO_NO_INCREMENT);
1697 }
1698
1699 //
1700 // Return status
1701 //
1702 return Status;
1703 }
1704
1705 NTSTATUS
1706 NTAPI
1707 RamdiskQueryDeviceRelations(IN DEVICE_RELATION_TYPE Type,
1708 IN PDEVICE_OBJECT DeviceObject,
1709 IN PIRP Irp)
1710 {
1711 PRAMDISK_BUS_EXTENSION DeviceExtension;
1712 PRAMDISK_DRIVE_EXTENSION DriveExtension;
1713 PDEVICE_RELATIONS DeviceRelations, OurDeviceRelations;
1714 ULONG Count, DiskCount, FinalCount;
1715 PLIST_ENTRY ListHead, NextEntry;
1716 PDEVICE_OBJECT* DriveDeviceObject;
1717 RAMDISK_DEVICE_STATE State;
1718
1719 //
1720 // Get the device extension and check if this is a drive
1721 //
1722 DeviceExtension = DeviceObject->DeviceExtension;
1723 if (DeviceExtension->Type == RamdiskDrive)
1724 {
1725 //
1726 // FIXME: TODO
1727 //
1728 UNIMPLEMENTED_DBGBREAK();
1729 }
1730
1731 //
1732 // Anything but bus relations, we don't handle
1733 //
1734 if (Type) goto PassToNext;
1735
1736 //
1737 // Acquire the disk list lock
1738 //
1739 KeEnterCriticalRegion();
1740 ExAcquireFastMutex(&DeviceExtension->DiskListLock);
1741
1742 //
1743 // Did a device already fill relations?
1744 //
1745 DeviceRelations = (PDEVICE_RELATIONS)Irp->IoStatus.Information;
1746 if (DeviceRelations)
1747 {
1748 //
1749 // Use the data
1750 //
1751 Count = DeviceRelations->Count;
1752 }
1753 else
1754 {
1755 //
1756 // We're the first
1757 //
1758 Count = 0;
1759 }
1760
1761 //
1762 // Now loop our drives
1763 //
1764 DiskCount = 0;
1765 ListHead = &DeviceExtension->DiskList;
1766 NextEntry = ListHead->Flink;
1767 while (NextEntry != ListHead)
1768 {
1769 //
1770 // As long as it wasn't removed, count it in
1771 //
1772 DriveExtension = CONTAINING_RECORD(NextEntry,
1773 RAMDISK_DRIVE_EXTENSION,
1774 DiskList);
1775 if (DriveExtension->State < RamdiskStateBusRemoved) DiskCount++;
1776
1777 //
1778 // Move to the next one
1779 //
1780 NextEntry = NextEntry->Flink;
1781 }
1782
1783 //
1784 // Now we know our final count
1785 //
1786 FinalCount = Count + DiskCount;
1787
1788 //
1789 // Allocate the structure
1790 //
1791 OurDeviceRelations = ExAllocatePoolWithTag(PagedPool,
1792 FIELD_OFFSET(DEVICE_RELATIONS,
1793 Objects) +
1794 FinalCount *
1795 sizeof(PDEVICE_OBJECT),
1796 'dmaR');
1797 if (!OurDeviceRelations)
1798 {
1799 //
1800 // Fail
1801 //
1802 ExReleaseFastMutex(&DeviceExtension->DiskListLock);
1803 KeLeaveCriticalRegion();
1804 Irp->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES;
1805 IoCompleteRequest(Irp, IO_NO_INCREMENT);
1806 return STATUS_INSUFFICIENT_RESOURCES;
1807 }
1808
1809 //
1810 // Check if we already had some relations
1811 //
1812 if (Count)
1813 {
1814 //
1815 // Copy them in
1816 //
1817 RtlCopyMemory(OurDeviceRelations->Objects,
1818 DeviceRelations->Objects,
1819 Count * sizeof(PDEVICE_OBJECT));
1820 }
1821
1822 //
1823 // Save the count
1824 //
1825 OurDeviceRelations->Count = FinalCount;
1826
1827 //
1828 // Now loop our drives again
1829 //
1830 ListHead = &DeviceExtension->DiskList;
1831 NextEntry = ListHead->Flink;
1832 while (NextEntry != ListHead)
1833 {
1834 //
1835 // Go to the end of the list
1836 //
1837 DriveDeviceObject = &OurDeviceRelations->Objects[Count];
1838
1839 //
1840 // Get the drive state
1841 //
1842 DriveExtension = CONTAINING_RECORD(NextEntry,
1843 RAMDISK_DRIVE_EXTENSION,
1844 DiskList);
1845 State = DriveExtension->State;
1846
1847 //
1848 // If it was removed or enumerated, we don't touch the device object
1849 //
1850 if (State >= RamdiskStateBusRemoved)
1851 {
1852 //
1853 // If it was removed, we still have to keep track of this though
1854 //
1855 if (State == RamdiskStateBusRemoved)
1856 {
1857 //
1858 // Mark it as enumerated now, but don't actually reference it
1859 //
1860 DriveExtension->State = RamdiskStateEnumerated;
1861 }
1862 }
1863 else
1864 {
1865 //
1866 // First time it's enumerated, reference the device object
1867 //
1868 ObReferenceObject(DriveExtension->DeviceObject);
1869
1870 //
1871 // Save the object pointer, and move on
1872 //
1873 *DriveDeviceObject++ = DriveExtension->DeviceObject;
1874 }
1875
1876 if (DriveExtension->State < RamdiskStateBusRemoved) DiskCount++;
1877
1878 //
1879 // Move to the next one
1880 //
1881 NextEntry = NextEntry->Flink;
1882 }
1883
1884 //
1885 // Release the lock
1886 //
1887 ExReleaseFastMutex(&DeviceExtension->DiskListLock);
1888 KeLeaveCriticalRegion();
1889
1890 //
1891 // Cleanup old relations
1892 //
1893 if (DeviceRelations) ExFreePool(DeviceRelations);
1894
1895 //
1896 // Complete our IRP
1897 //
1898 Irp->IoStatus.Information = (ULONG_PTR)OurDeviceRelations;
1899 Irp->IoStatus.Status = STATUS_SUCCESS;
1900
1901 //
1902 // Pass to the next driver
1903 //
1904 PassToNext:
1905 IoCopyCurrentIrpStackLocationToNext(Irp);
1906 return IoCallDriver(DeviceExtension->AttachedDevice, Irp);
1907 }
1908
1909 NTSTATUS
1910 NTAPI
1911 RamdiskDeleteDiskDevice(IN PDEVICE_OBJECT DeviceObject,
1912 IN PIRP Irp)
1913 {
1914 UNIMPLEMENTED_DBGBREAK();
1915 return STATUS_SUCCESS;
1916 }
1917
1918 NTSTATUS
1919 NTAPI
1920 RamdiskRemoveBusDevice(IN PDEVICE_OBJECT DeviceObject,
1921 IN PIRP Irp)
1922 {
1923 NTSTATUS Status;
1924 PLIST_ENTRY ListHead, NextEntry;
1925 PRAMDISK_BUS_EXTENSION DeviceExtension;
1926 PRAMDISK_DRIVE_EXTENSION DriveExtension;
1927
1928 DeviceExtension = DeviceObject->DeviceExtension;
1929
1930 //
1931 // Acquire disks list lock
1932 //
1933 KeEnterCriticalRegion();
1934 ExAcquireFastMutex(&DeviceExtension->DiskListLock);
1935
1936 //
1937 // Loop over drives
1938 //
1939 ListHead = &DeviceExtension->DiskList;
1940 NextEntry = ListHead->Flink;
1941 while (NextEntry != ListHead)
1942 {
1943 DriveExtension = CONTAINING_RECORD(NextEntry,
1944 RAMDISK_DRIVE_EXTENSION,
1945 DiskList);
1946
1947 //
1948 // Delete the disk
1949 //
1950 IoAcquireRemoveLock(&DriveExtension->RemoveLock, NULL);
1951 RamdiskDeleteDiskDevice(DriveExtension->PhysicalDeviceObject, NULL);
1952
1953 //
1954 // RamdiskDeleteDiskDevice releases list lock, so reacquire it
1955 //
1956 KeEnterCriticalRegion();
1957 ExAcquireFastMutex(&DeviceExtension->DiskListLock);
1958 }
1959
1960 //
1961 // Release disks list lock
1962 //
1963 ExReleaseFastMutex(&DeviceExtension->DiskListLock);
1964 KeLeaveCriticalRegion();
1965
1966 //
1967 // Prepare to pass to the lower driver
1968 //
1969 IoSkipCurrentIrpStackLocation(Irp);
1970 //
1971 // Here everything went fine
1972 //
1973 Irp->IoStatus.Status = STATUS_SUCCESS;
1974
1975 //
1976 // Call lower driver
1977 //
1978 Status = IoCallDriver(DeviceExtension->AttachedDevice, Irp);
1979
1980 //
1981 // Update state
1982 //
1983 DeviceExtension->State = RamdiskStateBusRemoved;
1984
1985 //
1986 // Release the lock, and ensure that everyone
1987 // has finished its job before we continue
1988 // The lock has been acquired by the dispatcher
1989 //
1990 IoReleaseRemoveLockAndWait(&DeviceExtension->RemoveLock, Irp);
1991
1992 //
1993 // If there's a drive name
1994 //
1995 if (DeviceExtension->DriveDeviceName.Buffer)
1996 {
1997 //
1998 // Inform it's going to be disabled
1999 // and free the drive name
2000 //
2001 IoSetDeviceInterfaceState(&DeviceExtension->DriveDeviceName, FALSE);
2002 RtlFreeUnicodeString(&DeviceExtension->DriveDeviceName);
2003 }
2004
2005 //
2006 // Part from the stack, detach from lower device
2007 //
2008 IoDetachDevice(DeviceExtension->AttachedDevice);
2009
2010 //
2011 // Finally, delete device
2012 //
2013 RamdiskBusFdo = NULL;
2014 IoDeleteDevice(DeviceObject);
2015
2016 //
2017 // Return status from lower driver
2018 //
2019 return Status;
2020 }
2021
2022 NTSTATUS
2023 NTAPI
2024 RamdiskPnp(IN PDEVICE_OBJECT DeviceObject,
2025 IN PIRP Irp)
2026 {
2027 PIO_STACK_LOCATION IoStackLocation;
2028 PRAMDISK_BUS_EXTENSION DeviceExtension;
2029 NTSTATUS Status;
2030 UCHAR Minor;
2031
2032 //
2033 // Get the device extension and stack location
2034 //
2035 DeviceExtension = DeviceObject->DeviceExtension;
2036 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
2037 Minor = IoStackLocation->MinorFunction;
2038
2039 //
2040 // Check if the bus is removed
2041 //
2042 if (DeviceExtension->State == RamdiskStateBusRemoved)
2043 {
2044 //
2045 // Only remove-device and query-id are allowed
2046 //
2047 if ((Minor != IRP_MN_REMOVE_DEVICE) && (Minor != IRP_MN_QUERY_ID))
2048 {
2049 //
2050 // Fail anything else
2051 //
2052 Status = STATUS_NO_SUCH_DEVICE;
2053 Irp->IoStatus.Status = Status;
2054 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2055 return Status;
2056 }
2057 }
2058
2059 //
2060 // Acquire the remove lock
2061 //
2062 Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Irp);
2063 if (!NT_SUCCESS(Status))
2064 {
2065 //
2066 // Fail the IRP
2067 //
2068 Irp->IoStatus.Information = 0;
2069 Irp->IoStatus.Status = Status;
2070 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2071 return Status;
2072 }
2073
2074 //
2075 // Query the IRP type
2076 //
2077 switch (Minor)
2078 {
2079 case IRP_MN_START_DEVICE:
2080
2081 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2082 break;
2083
2084 case IRP_MN_QUERY_STOP_DEVICE:
2085
2086 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2087 break;
2088
2089 case IRP_MN_CANCEL_STOP_DEVICE:
2090
2091 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2092 break;
2093
2094 case IRP_MN_STOP_DEVICE:
2095
2096 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2097 break;
2098
2099 case IRP_MN_QUERY_REMOVE_DEVICE:
2100
2101 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2102 break;
2103
2104 case IRP_MN_CANCEL_REMOVE_DEVICE:
2105
2106 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2107 break;
2108
2109 case IRP_MN_REMOVE_DEVICE:
2110
2111 //
2112 // Remove the proper device
2113 //
2114 if (DeviceExtension->Type == RamdiskBus)
2115 {
2116 Status = RamdiskRemoveBusDevice(DeviceObject, Irp);
2117
2118 //
2119 // Return here, lower device has already been called
2120 // And remove lock released. This is needed by the function.
2121 //
2122 return Status;
2123 }
2124 else
2125 {
2126 Status = RamdiskDeleteDiskDevice(DeviceObject, Irp);
2127
2128 //
2129 // Complete the IRP here and return
2130 // Here again we don't have to release remove lock
2131 // This has already been done by the function.
2132 //
2133 Irp->IoStatus.Status = Status;
2134 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2135 return Status;
2136 }
2137
2138 case IRP_MN_SURPRISE_REMOVAL:
2139
2140 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2141 break;
2142
2143 case IRP_MN_QUERY_ID:
2144
2145 //
2146 // Are we a drive?
2147 //
2148 if (DeviceExtension->Type == RamdiskDrive)
2149 {
2150 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2151 }
2152 break;
2153
2154 case IRP_MN_QUERY_BUS_INFORMATION:
2155
2156 //
2157 // Are we a drive?
2158 //
2159 if (DeviceExtension->Type == RamdiskDrive)
2160 {
2161 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2162 }
2163 break;
2164
2165 case IRP_MN_EJECT:
2166
2167 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2168 break;
2169
2170 case IRP_MN_QUERY_DEVICE_TEXT:
2171
2172 //
2173 // Are we a drive?
2174 //
2175 if (DeviceExtension->Type == RamdiskDrive)
2176 {
2177 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2178 }
2179 break;
2180
2181 case IRP_MN_QUERY_DEVICE_RELATIONS:
2182
2183 //
2184 // Call our main routine
2185 //
2186 Status = RamdiskQueryDeviceRelations(IoStackLocation->
2187 Parameters.
2188 QueryDeviceRelations.Type,
2189 DeviceObject,
2190 Irp);
2191 goto ReleaseAndReturn;
2192
2193 case IRP_MN_QUERY_CAPABILITIES:
2194
2195 //
2196 // Are we a drive?
2197 //
2198 if (DeviceExtension->Type == RamdiskDrive)
2199 {
2200 UNIMPLEMENTED_DBGBREAK("PnP IRP: %lx\n", Minor);
2201 }
2202 break;
2203
2204 case IRP_MN_QUERY_RESOURCES:
2205 case IRP_MN_QUERY_RESOURCE_REQUIREMENTS:
2206
2207 //
2208 // Complete immediately without touching it
2209 //
2210 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2211 goto ReleaseAndReturn;
2212
2213 default:
2214
2215 DPRINT1("Illegal IRP: %lx\n", Minor);
2216 break;
2217 }
2218
2219 //
2220 // Are we the bus?
2221 //
2222 if (DeviceExtension->Type == RamdiskBus)
2223 {
2224 //
2225 // Do we have an attached device?
2226 //
2227 if (DeviceExtension->AttachedDevice)
2228 {
2229 //
2230 // Forward the IRP
2231 //
2232 IoSkipCurrentIrpStackLocation(Irp);
2233 Status = IoCallDriver(DeviceExtension->AttachedDevice, Irp);
2234 }
2235 }
2236
2237 //
2238 // Release the lock and return status
2239 //
2240 ReleaseAndReturn:
2241 IoReleaseRemoveLock(&DeviceExtension->RemoveLock, Irp);
2242 return Status;
2243 }
2244
2245 NTSTATUS
2246 NTAPI
2247 RamdiskPower(IN PDEVICE_OBJECT DeviceObject,
2248 IN PIRP Irp)
2249 {
2250 NTSTATUS Status;
2251 PIO_STACK_LOCATION IoStackLocation;
2252 PRAMDISK_BUS_EXTENSION DeviceExtension;
2253
2254 DeviceExtension = DeviceObject->DeviceExtension;
2255
2256 //
2257 // If we have a device extension, take extra caution
2258 // with the lower driver
2259 //
2260 if (DeviceExtension != NULL)
2261 {
2262 PoStartNextPowerIrp(Irp);
2263
2264 //
2265 // Device has not been removed yet, so
2266 // pass to the attached/lower driver
2267 //
2268 if (DeviceExtension->State < RamdiskStateBusRemoved)
2269 {
2270 IoSkipCurrentIrpStackLocation(Irp);
2271 return PoCallDriver(DeviceExtension->AttachedDevice, Irp);
2272 }
2273 //
2274 // Otherwise, simply complete the IRP
2275 // Notifying that deletion is pending
2276 //
2277 else
2278 {
2279 Irp->IoStatus.Status = STATUS_DELETE_PENDING;
2280 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2281 return STATUS_DELETE_PENDING;
2282 }
2283 }
2284
2285 //
2286 // Get stack and deal with minor functions
2287 //
2288 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
2289 switch (IoStackLocation->MinorFunction)
2290 {
2291 case IRP_MN_SET_POWER:
2292 //
2293 // If setting device power state
2294 // it's all fine and return success
2295 //
2296 if (DevicePowerState)
2297 {
2298 Irp->IoStatus.Status = STATUS_SUCCESS;
2299 }
2300
2301 //
2302 // Get appropriate status for return
2303 //
2304 Status = Irp->IoStatus.Status;
2305 PoStartNextPowerIrp(Irp);
2306 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2307 break;
2308
2309 case IRP_MN_QUERY_POWER:
2310 //
2311 // We can obviously accept all states
2312 // So just return success
2313 //
2314 Status =
2315 Irp->IoStatus.Status = STATUS_SUCCESS;
2316 PoStartNextPowerIrp(Irp);
2317 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2318 break;
2319
2320 default:
2321 //
2322 // Just complete and save status for return
2323 //
2324 Status = Irp->IoStatus.Status;
2325 PoStartNextPowerIrp(Irp);
2326 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2327 break;
2328 }
2329
2330 return Status;
2331 }
2332
2333 NTSTATUS
2334 NTAPI
2335 RamdiskSystemControl(IN PDEVICE_OBJECT DeviceObject,
2336 IN PIRP Irp)
2337 {
2338 NTSTATUS Status;
2339 PRAMDISK_BUS_EXTENSION DeviceExtension;
2340
2341 DeviceExtension = DeviceObject->DeviceExtension;
2342
2343 //
2344 // If we have a device extension, forward the IRP
2345 // to the attached device
2346 //
2347 if (DeviceExtension != NULL)
2348 {
2349 IoSkipCurrentIrpStackLocation(Irp);
2350 Status = IoCallDriver(DeviceExtension->AttachedDevice, Irp);
2351 }
2352 //
2353 // Otherwise just complete the request
2354 // And return the status with which we complete it
2355 //
2356 else
2357 {
2358 Status = Irp->IoStatus.Status;
2359 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2360 }
2361
2362 return Status;
2363 }
2364
2365 NTSTATUS
2366 NTAPI
2367 RamdiskScsi(IN PDEVICE_OBJECT DeviceObject,
2368 IN PIRP Irp)
2369 {
2370 NTSTATUS Status;
2371 PRAMDISK_BUS_EXTENSION DeviceExtension;
2372
2373 DeviceExtension = DeviceObject->DeviceExtension;
2374
2375 //
2376 // Having a proper device is mandatory
2377 //
2378 if (DeviceExtension->State > RamdiskStateStopped)
2379 {
2380 Status = STATUS_DEVICE_DOES_NOT_EXIST;
2381 goto CompleteIRP;
2382 }
2383
2384 //
2385 // Acquire the remove lock
2386 //
2387 Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Irp);
2388 if (!NT_SUCCESS(Status))
2389 {
2390 goto CompleteIRP;
2391 }
2392
2393 //
2394 // Queue the IRP for worker
2395 //
2396 Status = SendIrpToThread(DeviceObject, Irp);
2397 if (Status != STATUS_PENDING)
2398 {
2399 goto CompleteIRP;
2400 }
2401
2402 //
2403 // Release the remove lock
2404 //
2405 IoReleaseRemoveLock(&DeviceExtension->RemoveLock, Irp);
2406 goto Quit;
2407
2408 CompleteIRP:
2409 Irp->IoStatus.Information = 0;
2410 Irp->IoStatus.Status = Status;
2411 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2412
2413 Quit:
2414 return Status;
2415 }
2416
2417 NTSTATUS
2418 NTAPI
2419 RamdiskFlushBuffers(IN PDEVICE_OBJECT DeviceObject,
2420 IN PIRP Irp)
2421 {
2422 NTSTATUS Status;
2423 PRAMDISK_DRIVE_EXTENSION DeviceExtension;
2424
2425 DeviceExtension = DeviceObject->DeviceExtension;
2426
2427 //
2428 // Ensure we have drive extension
2429 // Only perform flush on disks that have been created
2430 // from registry entries
2431 //
2432 if (DeviceExtension->Type != RamdiskDrive ||
2433 DeviceExtension->DiskType > RAMDISK_MEMORY_MAPPED_DISK)
2434 {
2435 Irp->IoStatus.Information = 0;
2436 Irp->IoStatus.Status = STATUS_SUCCESS;
2437 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2438 return STATUS_SUCCESS;
2439 }
2440
2441 //
2442 // Queue the IRP for worker
2443 //
2444 Status = SendIrpToThread(DeviceObject, Irp);
2445 if (Status != STATUS_PENDING)
2446 {
2447 //
2448 // Queueing failed - complete the IRP
2449 // and return failure
2450 //
2451 Irp->IoStatus.Information = 0;
2452 Irp->IoStatus.Status = Status;
2453 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2454 }
2455
2456 return Status;
2457 }
2458
2459 VOID
2460 NTAPI
2461 RamdiskUnload(IN PDRIVER_OBJECT DriverObject)
2462 {
2463 //
2464 // Just release registry path if previously allocated
2465 //
2466 if (DriverRegistryPath.Buffer)
2467 {
2468 ExFreePoolWithTag(DriverRegistryPath.Buffer, 'dmaR');
2469 }
2470 }
2471
2472 NTSTATUS
2473 NTAPI
2474 RamdiskAddDevice(IN PDRIVER_OBJECT DriverObject,
2475 IN PDEVICE_OBJECT PhysicalDeviceObject)
2476 {
2477 PRAMDISK_BUS_EXTENSION DeviceExtension;
2478 PDEVICE_OBJECT AttachedDevice;
2479 NTSTATUS Status;
2480 UNICODE_STRING DeviceName;
2481 PDEVICE_OBJECT DeviceObject;
2482
2483 //
2484 // Only create the bus FDO once
2485 //
2486 if (RamdiskBusFdo) return STATUS_DEVICE_ALREADY_ATTACHED;
2487
2488 //
2489 // Create the bus FDO
2490 //
2491 RtlInitUnicodeString(&DeviceName, L"\\Device\\Ramdisk");
2492 Status = IoCreateDevice(DriverObject,
2493 sizeof(RAMDISK_BUS_EXTENSION),
2494 &DeviceName,
2495 FILE_DEVICE_BUS_EXTENDER,
2496 FILE_DEVICE_SECURE_OPEN,
2497 0,
2498 &DeviceObject);
2499 if (NT_SUCCESS(Status))
2500 {
2501 //
2502 // Initialize the bus FDO extension
2503 //
2504 DeviceExtension = DeviceObject->DeviceExtension;
2505 RtlZeroMemory(DeviceObject->DeviceExtension,
2506 sizeof(RAMDISK_BUS_EXTENSION));
2507
2508 //
2509 // Set bus FDO flags
2510 //
2511 DeviceObject->Flags |= DO_POWER_PAGABLE | DO_DIRECT_IO;
2512
2513 //
2514 // Setup the bus FDO extension
2515 //
2516 DeviceExtension->Type = RamdiskBus;
2517 ExInitializeFastMutex(&DeviceExtension->DiskListLock);
2518 IoInitializeRemoveLock(&DeviceExtension->RemoveLock,
2519 'dmaR',
2520 0,
2521 1);
2522 InitializeListHead(&DeviceExtension->DiskList);
2523 DeviceExtension->PhysicalDeviceObject = PhysicalDeviceObject;
2524 DeviceExtension->DeviceObject = DeviceObject;
2525
2526 //
2527 // Register the RAM disk device interface
2528 //
2529 Status = IoRegisterDeviceInterface(PhysicalDeviceObject,
2530 &RamdiskBusInterface,
2531 NULL,
2532 &DeviceExtension->BusDeviceName);
2533 if (!NT_SUCCESS(Status))
2534 {
2535 //
2536 // Fail
2537 //
2538 IoDeleteDevice(DeviceObject);
2539 return Status;
2540 }
2541
2542 //
2543 // Attach us to the device stack
2544 //
2545 AttachedDevice = IoAttachDeviceToDeviceStack(DeviceObject,
2546 PhysicalDeviceObject);
2547 DeviceExtension->AttachedDevice = AttachedDevice;
2548 if (!AttachedDevice)
2549 {
2550 //
2551 // Fail
2552 //
2553 IoSetDeviceInterfaceState(&DeviceExtension->BusDeviceName, 0);
2554 RtlFreeUnicodeString(&DeviceExtension->BusDeviceName);
2555 IoDeleteDevice(DeviceObject);
2556 return STATUS_NO_SUCH_DEVICE;
2557 }
2558
2559 //
2560 // Bus FDO is initialized
2561 //
2562 RamdiskBusFdo = DeviceObject;
2563
2564 //
2565 // Loop for loader block
2566 //
2567 if (KeLoaderBlock)
2568 {
2569 //
2570 // Are we being booted from setup? Not yet supported
2571 //
2572 //ASSERT(!KeLoaderBlock->SetupLdrBlock);
2573 }
2574
2575 //
2576 // All done
2577 //
2578 DeviceObject->Flags &= DO_DEVICE_INITIALIZING;
2579 Status = STATUS_SUCCESS;
2580 }
2581
2582 //
2583 // Return status
2584 //
2585 return Status;
2586 }
2587
2588 NTSTATUS
2589 NTAPI
2590 DriverEntry(IN PDRIVER_OBJECT DriverObject,
2591 IN PUNICODE_STRING RegistryPath)
2592 {
2593 PCHAR BootDeviceName, CommandLine;
2594 PDEVICE_OBJECT PhysicalDeviceObject = NULL;
2595 NTSTATUS Status;
2596 DPRINT("RAM Disk Driver Initialized\n");
2597
2598 //
2599 // Query ramdisk parameters
2600 //
2601 QueryParameters(RegistryPath);
2602
2603 //
2604 // Save the registry path
2605 //
2606 DriverRegistryPath = *RegistryPath;
2607 DriverRegistryPath.Buffer = ExAllocatePoolWithTag(PagedPool,
2608 RegistryPath->Length +
2609 sizeof(WCHAR),
2610 'dmaR');
2611 if (!DriverRegistryPath.Buffer) return STATUS_INSUFFICIENT_RESOURCES;
2612 RtlCopyUnicodeString(&DriverRegistryPath, RegistryPath);
2613
2614 //
2615 // Set device routines
2616 //
2617 DriverObject->MajorFunction[IRP_MJ_CREATE] = RamdiskOpenClose;
2618 DriverObject->MajorFunction[IRP_MJ_CLOSE] = RamdiskOpenClose;
2619 DriverObject->MajorFunction[IRP_MJ_READ] = RamdiskReadWrite;
2620 DriverObject->MajorFunction[IRP_MJ_WRITE] = RamdiskReadWrite;
2621 DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = RamdiskDeviceControl;
2622 DriverObject->MajorFunction[IRP_MJ_PNP] = RamdiskPnp;
2623 DriverObject->MajorFunction[IRP_MJ_POWER] = RamdiskPower;
2624 DriverObject->MajorFunction[IRP_MJ_SYSTEM_CONTROL] = RamdiskSystemControl;
2625 DriverObject->MajorFunction[IRP_MJ_SCSI] = RamdiskScsi;
2626 DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = RamdiskFlushBuffers;
2627 DriverObject->DriverExtension->AddDevice = RamdiskAddDevice;
2628 DriverObject->DriverUnload = RamdiskUnload;
2629
2630 //
2631 // Check for a loader block
2632 //
2633 if (KeLoaderBlock)
2634 {
2635 //
2636 // Get the boot device name
2637 //
2638 BootDeviceName = KeLoaderBlock->ArcBootDeviceName;
2639 if (BootDeviceName)
2640 {
2641 //
2642 // Check if we're booting from ramdisk
2643 //
2644 if ((strlen(BootDeviceName) >= 10) &&
2645 !(_strnicmp(BootDeviceName, "ramdisk(0)", 10)))
2646 {
2647 //
2648 // We'll have to tell the PnP Manager
2649 //
2650 ReportDetectedDevice = TRUE;
2651
2652 //
2653 // Check for a command line
2654 //
2655 CommandLine = KeLoaderBlock->LoadOptions;
2656 if (CommandLine)
2657 {
2658 //
2659 // Check if this is an ISO boot
2660 //
2661 if (strstr(CommandLine, "RDEXPORTASCD"))
2662 {
2663 //
2664 // Remember for later
2665 //
2666 ExportBootDiskAsCd = TRUE;
2667 }
2668
2669 //
2670 // Check if this is PE boot
2671 //
2672 if (strstr(CommandLine, "MININT"))
2673 {
2674 //
2675 // Remember for later
2676 //
2677 IsWinPEBoot = TRUE;
2678 }
2679 }
2680 }
2681
2682 }
2683 }
2684
2685 //
2686 // Installing from Ramdisk isn't supported yet
2687 //
2688 //ASSERT(!KeLoaderBlock->SetupLdrBlock);
2689
2690 //
2691 // Are we reporting the device
2692 //
2693 if (ReportDetectedDevice)
2694 {
2695 //
2696 // Do it
2697 //
2698 Status = IoReportDetectedDevice(DriverObject,
2699 InterfaceTypeUndefined,
2700 0xFFFFFFFF,
2701 0xFFFFFFFF,
2702 NULL,
2703 NULL,
2704 0,
2705 &PhysicalDeviceObject);
2706 if (NT_SUCCESS(Status))
2707 {
2708 //
2709 // Create the device object
2710 //
2711 Status = RamdiskAddDevice(DriverObject, PhysicalDeviceObject);
2712 if (NT_SUCCESS(Status))
2713 {
2714 //
2715 // We're done
2716 //
2717 PhysicalDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
2718 Status = STATUS_SUCCESS;
2719 }
2720 }
2721 }
2722 else
2723 {
2724 //
2725 // Done
2726 //
2727 Status = STATUS_SUCCESS;
2728 }
2729
2730 //
2731 // Done
2732 //
2733 return Status;
2734 }