42b94c9b0a06ad0d952511fbc09c4c3256bec714
[reactos.git] / 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;
776 while (TRUE);
777 return STATUS_SUCCESS;
778 }
779
780 NTSTATUS
781 NTAPI
782 RamdiskCreateRamdisk(IN PDEVICE_OBJECT DeviceObject,
783 IN PIRP Irp,
784 IN BOOLEAN ValidateOnly)
785 {
786 PRAMDISK_CREATE_INPUT Input;
787 ULONG Length;
788 PRAMDISK_BUS_EXTENSION DeviceExtension;
789 PRAMDISK_DRIVE_EXTENSION DriveExtension;
790 ULONG DiskType;
791 PWCHAR FileNameStart, FileNameEnd;
792 NTSTATUS Status;
793 PIO_STACK_LOCATION IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
794
795 //
796 // Get the device extension and our input data
797 //
798 DeviceExtension = DeviceObject->DeviceExtension;
799 Length = IoStackLocation->Parameters.DeviceIoControl.InputBufferLength;
800 Input = (PRAMDISK_CREATE_INPUT)Irp->AssociatedIrp.SystemBuffer;
801
802 //
803 // Validate input parameters
804 //
805 if ((Length < sizeof(RAMDISK_CREATE_INPUT)) ||
806 (Input->Version != sizeof(RAMDISK_CREATE_INPUT)))
807 {
808 //
809 // Invalid input
810 //
811 return STATUS_INVALID_PARAMETER;
812 }
813
814 //
815 // Validate the disk type
816 //
817 DiskType = Input->DiskType;
818 if (DiskType == RAMDISK_WIM_DISK) return STATUS_INVALID_PARAMETER;
819
820 //
821 // Look at the disk type
822 //
823 if (DiskType == RAMDISK_BOOT_DISK)
824 {
825 //
826 // We only allow this as an early-init boot
827 //
828 if (!KeLoaderBlock) return STATUS_INVALID_PARAMETER;
829
830 //
831 // Save command-line flags
832 //
833 if (ExportBootDiskAsCd) Input->Options.ExportAsCd = TRUE;
834 if (IsWinPEBoot) Input->Options.NoDriveLetter = TRUE;
835 }
836
837 //
838 // Validate the disk type
839 //
840 if ((Input->Options.ExportAsCd) && (DiskType != RAMDISK_BOOT_DISK))
841 {
842 //
843 // If the type isn't CDFS, it has to at least be raw CD
844 //
845 if (DiskType != RAMDISK_MEMORY_MAPPED_DISK) return STATUS_INVALID_PARAMETER;
846 }
847
848 //
849 // Check if this is an actual file
850 //
851 if (DiskType <= RAMDISK_MEMORY_MAPPED_DISK)
852 {
853 //
854 // Validate the file name
855 //
856 FileNameStart = (PWCHAR)((ULONG_PTR)Input + Length);
857 FileNameEnd = Input->FileName + 1;
858 while ((FileNameEnd < FileNameStart) && *(FileNameEnd)) FileNameEnd++;
859 if (FileNameEnd == FileNameStart) return STATUS_INVALID_PARAMETER;
860 }
861
862 //
863 // Create the actual device
864 //
865 Status = RamdiskCreateDiskDevice(DeviceExtension,
866 Input,
867 ValidateOnly,
868 &DriveExtension);
869 if (NT_SUCCESS(Status))
870 {
871 //
872 // Invalidate and set success
873 //
874 IoInvalidateDeviceRelations(DeviceExtension->PhysicalDeviceObject, 0);
875 Irp->IoStatus.Information = STATUS_SUCCESS;
876 }
877
878 //
879 // We're done
880 //
881 return Status;
882 }
883
884 NTSTATUS
885 NTAPI
886 RamdiskGetPartitionInfo(IN PIRP Irp,
887 IN PRAMDISK_DRIVE_EXTENSION DeviceExtension)
888 {
889 NTSTATUS Status;
890 PPARTITION_INFORMATION PartitionInfo;
891 PVOID BaseAddress;
892 LARGE_INTEGER Zero = {{0, 0}};
893 ULONG Length;
894 PIO_STACK_LOCATION IoStackLocation;
895
896 //
897 // Validate the length
898 //
899 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
900 if (IoStackLocation->Parameters.DeviceIoControl.
901 OutputBufferLength < sizeof(PARTITION_INFORMATION))
902 {
903 //
904 // Invalid length
905 //
906 Status = STATUS_BUFFER_TOO_SMALL;
907 Irp->IoStatus.Status = Status;
908 Irp->IoStatus.Information = 0;
909 return Status;
910 }
911
912 //
913 // Map the partition table
914 //
915 BaseAddress = RamdiskMapPages(DeviceExtension, Zero, PAGE_SIZE, &Length);
916 if (!BaseAddress)
917 {
918 //
919 // No memory
920 //
921 Status = STATUS_INSUFFICIENT_RESOURCES;
922 Irp->IoStatus.Status = Status;
923 Irp->IoStatus.Information = 0;
924 return Status;
925 }
926
927 //
928 // Fill out the information
929 //
930 PartitionInfo = Irp->AssociatedIrp.SystemBuffer;
931 PartitionInfo->StartingOffset.QuadPart = DeviceExtension->BytesPerSector;
932 PartitionInfo->PartitionLength.QuadPart = DeviceExtension->BytesPerSector *
933 DeviceExtension->SectorsPerTrack *
934 DeviceExtension->NumberOfHeads *
935 DeviceExtension->Cylinders;
936 PartitionInfo->HiddenSectors = DeviceExtension->HiddenSectors;
937 PartitionInfo->PartitionNumber = 0;
938 PartitionInfo->PartitionType = *((PCHAR)BaseAddress + 450);
939 PartitionInfo->BootIndicator = (DeviceExtension->DiskType ==
940 RAMDISK_BOOT_DISK) ? TRUE: FALSE;
941 PartitionInfo->RecognizedPartition = IsRecognizedPartition(PartitionInfo->
942 PartitionType);
943 PartitionInfo->RewritePartition = FALSE;
944
945 //
946 // Unmap the partition table
947 //
948 RamdiskUnmapPages(DeviceExtension, BaseAddress, Zero, Length);
949
950 //
951 // Done
952 //
953 Irp->IoStatus.Status = STATUS_SUCCESS;
954 Irp->IoStatus.Information = sizeof(PARTITION_INFORMATION);
955 return STATUS_SUCCESS;
956 }
957
958 NTSTATUS
959 NTAPI
960 RamdiskSetPartitionInfo(IN PIRP Irp,
961 IN PRAMDISK_DRIVE_EXTENSION DeviceExtension)
962 {
963 ULONG BytesRead;
964 NTSTATUS Status;
965 PVOID BaseAddress;
966 PIO_STACK_LOCATION Stack;
967 LARGE_INTEGER Zero = {{0, 0}};
968 PPARTITION_INFORMATION PartitionInfo;
969
970 //
971 // First validate input
972 //
973 Stack = IoGetCurrentIrpStackLocation(Irp);
974 if (Stack->Parameters.DeviceIoControl.InputBufferLength < sizeof(PARTITION_INFORMATION))
975 {
976 Status = STATUS_INVALID_PARAMETER;
977 goto SetAndQuit;
978 }
979
980 //
981 // Map to get MBR
982 //
983 BaseAddress = RamdiskMapPages(DeviceExtension, Zero, PAGE_SIZE, &BytesRead);
984 if (BaseAddress == NULL)
985 {
986 Status = STATUS_INSUFFICIENT_RESOURCES;
987 goto SetAndQuit;
988 }
989
990 //
991 // Set the new partition type
992 // On partition 0, field system indicator
993 //
994 PartitionInfo = (PPARTITION_INFORMATION)Irp->AssociatedIrp.SystemBuffer;
995 *((PCHAR)BaseAddress + 450) = PartitionInfo->PartitionType;
996
997 //
998 // And unmap
999 //
1000 RamdiskUnmapPages(DeviceExtension, BaseAddress, Zero, BytesRead);
1001 Status = STATUS_SUCCESS;
1002
1003 SetAndQuit:
1004 Irp->IoStatus.Status = Status;
1005 Irp->IoStatus.Information = 0;
1006 return Status;
1007 }
1008
1009 VOID
1010 NTAPI
1011 RamdiskWorkerThread(IN PDEVICE_OBJECT DeviceObject,
1012 IN PVOID Context)
1013 {
1014 PRAMDISK_BUS_EXTENSION DeviceExtension;
1015 NTSTATUS Status;
1016 PIO_STACK_LOCATION IoStackLocation;
1017 PIRP Irp = Context;
1018
1019 //
1020 // Get the stack location
1021 //
1022 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
1023
1024 //
1025 // Free the work item
1026 //
1027 IoFreeWorkItem(Irp->Tail.Overlay.DriverContext[0]);
1028
1029 //
1030 // Grab the device extension and lock it
1031 //
1032 DeviceExtension = DeviceObject->DeviceExtension;
1033 Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Irp);
1034 if (NT_SUCCESS(Status))
1035 {
1036 //
1037 // Discriminate by major code
1038 //
1039 switch (IoStackLocation->MajorFunction)
1040 {
1041 //
1042 // Device control
1043 //
1044 case IRP_MJ_DEVICE_CONTROL:
1045
1046 //
1047 // Let's take a look at the IOCTL
1048 //
1049 switch (IoStackLocation->Parameters.DeviceIoControl.IoControlCode)
1050 {
1051 //
1052 // Ramdisk create request
1053 //
1054 case FSCTL_CREATE_RAM_DISK:
1055
1056 //
1057 // This time we'll do it for real
1058 //
1059 Status = RamdiskCreateRamdisk(DeviceObject, Irp, FALSE);
1060 break;
1061
1062 case IOCTL_DISK_SET_PARTITION_INFO:
1063
1064 Status = RamdiskSetPartitionInfo(Irp, (PRAMDISK_DRIVE_EXTENSION)DeviceExtension);
1065 break;
1066
1067 case IOCTL_DISK_GET_DRIVE_LAYOUT:
1068
1069 DPRINT1("Get drive layout request\n");
1070 UNIMPLEMENTED;
1071 while (TRUE);
1072 break;
1073
1074 case IOCTL_DISK_GET_PARTITION_INFO:
1075
1076 Status = RamdiskGetPartitionInfo(Irp, (PRAMDISK_DRIVE_EXTENSION)DeviceExtension);
1077 break;
1078
1079 default:
1080
1081 DPRINT1("Invalid request\n");
1082 UNIMPLEMENTED;
1083 while (TRUE);
1084 break;
1085 }
1086
1087 //
1088 // We're here
1089 //
1090 break;
1091
1092 //
1093 // Read or write request
1094 //
1095 case IRP_MJ_READ:
1096 case IRP_MJ_WRITE:
1097
1098 DPRINT1("Read/Write request\n");
1099 UNIMPLEMENTED;
1100 while (TRUE);
1101 break;
1102
1103 //
1104 // Internal request (SCSI?)
1105 //
1106 case IRP_MJ_INTERNAL_DEVICE_CONTROL:
1107
1108 DPRINT1("SCSI request\n");
1109 UNIMPLEMENTED;
1110 while (TRUE);
1111 break;
1112
1113 //
1114 // Flush request
1115 //
1116 case IRP_MJ_FLUSH_BUFFERS:
1117
1118 DPRINT1("Flush request\n");
1119 UNIMPLEMENTED;
1120 while (TRUE);
1121 break;
1122
1123 //
1124 // Anything else
1125 //
1126 default:
1127
1128 DPRINT1("Invalid request: %lx\n", IoStackLocation->MajorFunction);
1129 UNIMPLEMENTED;
1130 while (TRUE);
1131 break;
1132 }
1133
1134 //
1135 // Complete the I/O
1136 //
1137 IoReleaseRemoveLock(&DeviceExtension->RemoveLock, Irp);
1138 Irp->IoStatus.Status = Status;
1139 Irp->IoStatus.Information = 0;
1140 IoCompleteRequest(Irp, IO_DISK_INCREMENT);
1141 return;
1142 }
1143
1144 //
1145 // Fail the I/O
1146 //
1147 Irp->IoStatus.Status = Status;
1148 Irp->IoStatus.Information = 0;
1149 IoCompleteRequest(Irp, IO_NO_INCREMENT);
1150 }
1151
1152 NTSTATUS
1153 NTAPI
1154 SendIrpToThread(IN PDEVICE_OBJECT DeviceObject,
1155 IN PIRP Irp)
1156 {
1157 PIO_WORKITEM WorkItem;
1158
1159 //
1160 // Mark the IRP pending
1161 //
1162 IoMarkIrpPending(Irp);
1163
1164 //
1165 // Allocate a work item
1166 //
1167 WorkItem = IoAllocateWorkItem(DeviceObject);
1168 if (WorkItem)
1169 {
1170 //
1171 // Queue it up
1172 //
1173 Irp->Tail.Overlay.DriverContext[0] = WorkItem;
1174 IoQueueWorkItem(WorkItem, RamdiskWorkerThread, DelayedWorkQueue, Irp);
1175 return STATUS_PENDING;
1176 }
1177 else
1178 {
1179 //
1180 // Fail
1181 //
1182 return STATUS_INSUFFICIENT_RESOURCES;
1183 }
1184 }
1185
1186 NTSTATUS
1187 NTAPI
1188 RamdiskReadWriteReal(IN PIRP Irp,
1189 IN PRAMDISK_DRIVE_EXTENSION DeviceExtension)
1190 {
1191 PMDL Mdl;
1192 PVOID CurrentBase, SystemVa, BaseAddress;
1193 PIO_STACK_LOCATION IoStackLocation;
1194 LARGE_INTEGER CurrentOffset;
1195 ULONG BytesRead, BytesLeft, CopyLength;
1196 PVOID Source, Destination;
1197 NTSTATUS Status;
1198
1199 //
1200 // Get the MDL and check if it's mapped
1201 //
1202 Mdl = Irp->MdlAddress;
1203 if (Mdl->MdlFlags & (MDL_MAPPED_TO_SYSTEM_VA | MDL_SOURCE_IS_NONPAGED_POOL))
1204 {
1205 //
1206 // Use the mapped address
1207 //
1208 SystemVa = Mdl->MappedSystemVa;
1209 }
1210 else
1211 {
1212 //
1213 // Map it ourselves
1214 //
1215 SystemVa = MmMapLockedPagesSpecifyCache(Mdl,
1216 0,
1217 MmCached,
1218 NULL,
1219 0,
1220 NormalPagePriority);
1221 }
1222
1223 //
1224 // Make sure we were able to map it
1225 //
1226 CurrentBase = SystemVa;
1227 if (!SystemVa) return STATUS_INSUFFICIENT_RESOURCES;
1228
1229 //
1230 // Initialize default
1231 //
1232 Irp->IoStatus.Information = 0;
1233
1234 //
1235 // Get the I/O Stack Location and capture the data
1236 //
1237 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
1238 CurrentOffset = IoStackLocation->Parameters.Read.ByteOffset;
1239 BytesLeft = IoStackLocation->Parameters.Read.Length;
1240 if (!BytesLeft) return STATUS_INVALID_PARAMETER;
1241
1242 //
1243 // Do the copy loop
1244 //
1245 while (TRUE)
1246 {
1247 //
1248 // Map the pages
1249 //
1250 BaseAddress = RamdiskMapPages(DeviceExtension,
1251 CurrentOffset,
1252 BytesLeft,
1253 &BytesRead);
1254 if (!BaseAddress) return STATUS_INSUFFICIENT_RESOURCES;
1255
1256 //
1257 // Update our lengths
1258 //
1259 Irp->IoStatus.Information += BytesRead;
1260 CopyLength = BytesRead;
1261
1262 //
1263 // Check if this was a read or write
1264 //
1265 Status = STATUS_SUCCESS;
1266 if (IoStackLocation->MajorFunction == IRP_MJ_READ)
1267 {
1268 //
1269 // Set our copy parameters
1270 //
1271 Destination = CurrentBase;
1272 Source = BaseAddress;
1273 goto DoCopy;
1274 }
1275 else if (IoStackLocation->MajorFunction == IRP_MJ_WRITE)
1276 {
1277 //
1278 // Set our copy parameters
1279 //
1280 Destination = BaseAddress;
1281 Source = CurrentBase;
1282 DoCopy:
1283 //
1284 // Copy the data
1285 //
1286 RtlCopyMemory(Destination, Source, CopyLength);
1287 }
1288 else
1289 {
1290 //
1291 // Prepare us for failure
1292 //
1293 BytesLeft = CopyLength;
1294 Status = STATUS_INVALID_PARAMETER;
1295 }
1296
1297 //
1298 // Unmap the pages
1299 //
1300 RamdiskUnmapPages(DeviceExtension,
1301 BaseAddress,
1302 CurrentOffset,
1303 BytesRead);
1304
1305 //
1306 // Update offset and bytes left
1307 //
1308 BytesLeft -= BytesRead;
1309 CurrentOffset.QuadPart += BytesRead;
1310 CurrentBase = (PVOID)((ULONG_PTR)CurrentBase + BytesRead);
1311
1312 //
1313 // Check if we're done
1314 //
1315 if (!BytesLeft) return Status;
1316 }
1317 }
1318
1319 NTSTATUS
1320 NTAPI
1321 RamdiskOpenClose(IN PDEVICE_OBJECT DeviceObject,
1322 IN PIRP Irp)
1323 {
1324 //
1325 // Complete the IRP
1326 //
1327 Irp->IoStatus.Information = 1;
1328 Irp->IoStatus.Status = STATUS_SUCCESS;
1329 IoCompleteRequest(Irp, IO_NO_INCREMENT);
1330 return STATUS_SUCCESS;
1331 }
1332
1333 NTSTATUS
1334 NTAPI
1335 RamdiskReadWrite(IN PDEVICE_OBJECT DeviceObject,
1336 IN PIRP Irp)
1337 {
1338 PRAMDISK_DRIVE_EXTENSION DeviceExtension;
1339 //ULONG Length;
1340 //LARGE_INTEGER ByteOffset;
1341 PIO_STACK_LOCATION IoStackLocation;
1342 NTSTATUS Status, ReturnStatus;
1343
1344 //
1345 // Get the device extension and make sure this isn't a bus
1346 //
1347 DeviceExtension = DeviceObject->DeviceExtension;
1348 if (DeviceExtension->Type == RamdiskBus)
1349 {
1350 //
1351 // Fail
1352 //
1353 Status = STATUS_INVALID_DEVICE_REQUEST;
1354 goto Complete;
1355 }
1356
1357 //
1358 // Capture parameters
1359 //
1360 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
1361 //Length = IoStackLocation->Parameters.Read.Length;
1362 //ByteOffset = IoStackLocation->Parameters.Read.ByteOffset;
1363
1364 //
1365 // FIXME: Validate offset
1366 //
1367
1368 //
1369 // FIXME: Validate sector
1370 //
1371
1372 //
1373 // Validate write
1374 //
1375 if ((IoStackLocation->MajorFunction == IRP_MJ_WRITE) &&
1376 (DeviceExtension->DiskOptions.Readonly))
1377 {
1378 //
1379 // Fail, this is read-only
1380 //
1381 Status = STATUS_MEDIA_WRITE_PROTECTED;
1382 goto Complete;
1383 }
1384
1385 //
1386 // See if we want to do this sync or async
1387 //
1388 if (DeviceExtension->DiskType > RAMDISK_MEMORY_MAPPED_DISK)
1389 {
1390 //
1391 // Do it sync
1392 //
1393 Status = RamdiskReadWriteReal(Irp, DeviceExtension);
1394 goto Complete;
1395 }
1396
1397 //
1398 // Queue it to the worker
1399 //
1400 Status = SendIrpToThread(DeviceObject, Irp);
1401 ReturnStatus = STATUS_PENDING;
1402
1403 //
1404 // Check if we're pending or not
1405 //
1406 if (Status != STATUS_PENDING)
1407 {
1408 Complete:
1409 //
1410 // Complete the IRP
1411 //
1412 Irp->IoStatus.Status = Status;
1413 IoCompleteRequest(Irp, IO_DISK_INCREMENT);
1414 ReturnStatus = Status;
1415 }
1416
1417 //
1418 // Return to caller
1419 //
1420 return ReturnStatus;
1421 }
1422
1423 NTSTATUS
1424 NTAPI
1425 RamdiskDeviceControl(IN PDEVICE_OBJECT DeviceObject,
1426 IN PIRP Irp)
1427 {
1428 NTSTATUS Status;
1429 PIO_STACK_LOCATION IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
1430 PRAMDISK_BUS_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
1431 PRAMDISK_DRIVE_EXTENSION DriveExtension = (PVOID)DeviceExtension;
1432 ULONG Information;
1433 PCDROM_TOC Toc;
1434 PDISK_GEOMETRY DiskGeometry;
1435
1436 //
1437 // Grab the remove lock
1438 //
1439 Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Irp);
1440 if (!NT_SUCCESS(Status))
1441 {
1442 //
1443 // Fail the IRP
1444 //
1445 Irp->IoStatus.Information = 0;
1446 Irp->IoStatus.Status = Status;
1447 IoCompleteRequest(Irp, IO_NO_INCREMENT);
1448 return Status;
1449 }
1450
1451 //
1452 // Setup some defaults
1453 //
1454 Status = STATUS_INVALID_DEVICE_REQUEST;
1455 Information = 0;
1456
1457 //
1458 // Check if this is an bus device or the drive
1459 //
1460 if (DeviceExtension->Type == RamdiskBus)
1461 {
1462 //
1463 // Check what the request is
1464 //
1465 switch (IoStackLocation->Parameters.DeviceIoControl.IoControlCode)
1466 {
1467 //
1468 // Request to create a ramdisk
1469 //
1470 case FSCTL_CREATE_RAM_DISK:
1471
1472 //
1473 // Do it
1474 //
1475 Status = RamdiskCreateRamdisk(DeviceObject, Irp, TRUE);
1476 if (!NT_SUCCESS(Status)) goto CompleteRequest;
1477 break;
1478
1479 default:
1480
1481 //
1482 // We don't handle anything else yet
1483 //
1484 ASSERT(FALSE);
1485 while (TRUE);
1486 }
1487 }
1488 else
1489 {
1490 //
1491 // Check what the request is
1492 //
1493 switch (IoStackLocation->Parameters.DeviceIoControl.IoControlCode)
1494 {
1495 case IOCTL_DISK_CHECK_VERIFY:
1496 case IOCTL_STORAGE_CHECK_VERIFY:
1497 case IOCTL_STORAGE_CHECK_VERIFY2:
1498 case IOCTL_CDROM_CHECK_VERIFY:
1499
1500 UNIMPLEMENTED;
1501 while (TRUE);
1502 break;
1503
1504 case IOCTL_STORAGE_GET_MEDIA_TYPES:
1505 case IOCTL_DISK_GET_MEDIA_TYPES:
1506 case IOCTL_DISK_GET_DRIVE_GEOMETRY:
1507 case IOCTL_CDROM_GET_DRIVE_GEOMETRY:
1508
1509 //
1510 // Validate the length
1511 //
1512 if (IoStackLocation->Parameters.DeviceIoControl.
1513 OutputBufferLength < sizeof(DISK_GEOMETRY))
1514 {
1515 //
1516 // Invalid length
1517 //
1518 Status = STATUS_BUFFER_TOO_SMALL;
1519 break;
1520 }
1521
1522 //
1523 // Fill it out
1524 //
1525 DiskGeometry = Irp->AssociatedIrp.SystemBuffer;
1526 DiskGeometry->Cylinders.QuadPart = DriveExtension->Cylinders;
1527 DiskGeometry->BytesPerSector = DriveExtension->BytesPerSector;
1528 DiskGeometry->SectorsPerTrack = DriveExtension->SectorsPerTrack;
1529 DiskGeometry->TracksPerCylinder = DriveExtension->NumberOfHeads;
1530 DiskGeometry->MediaType = DriveExtension->DiskOptions.Fixed ?
1531 FixedMedia : RemovableMedia;
1532
1533 //
1534 // We're done
1535 //
1536 Status = STATUS_SUCCESS;
1537 Information = sizeof(DISK_GEOMETRY);
1538 break;
1539
1540 //
1541 // Hack to support ReactOS's broken CDFS
1542 //
1543 case IOCTL_CDROM_GET_LAST_SESSION:
1544
1545 //
1546 // Validate the length
1547 //
1548 if (IoStackLocation->Parameters.DeviceIoControl.
1549 OutputBufferLength < RAMDISK_SESSION_SIZE)
1550 {
1551 //
1552 // Invalid length
1553 //
1554 Status = STATUS_BUFFER_TOO_SMALL;
1555 break;
1556 }
1557
1558 //
1559 // Fill out the TOC
1560 //
1561 Toc = Irp->AssociatedIrp.SystemBuffer;
1562 Toc->Length[0] = 0;
1563 Toc->Length[1] = RAMDISK_SESSION_SIZE - sizeof(Toc->Length);
1564 Toc->FirstTrack = 1;
1565 Toc->LastTrack = 1;
1566 Toc->TrackData[0].Adr = 1;
1567 Toc->TrackData[0].Control = TOC_DATA_TRACK;
1568 Toc->TrackData[0].TrackNumber = 1;
1569 Toc->TrackData[0].Address[0] =
1570 Toc->TrackData[0].Address[1] =
1571 Toc->TrackData[0].Address[2] =
1572 Toc->TrackData[0].Address[3] = 0;
1573
1574 //
1575 // We're done
1576 //
1577 Status = STATUS_SUCCESS;
1578 Information = RAMDISK_SESSION_SIZE;
1579 break;
1580
1581 case IOCTL_CDROM_READ_TOC:
1582
1583 //
1584 // Validate the length
1585 //
1586 if (IoStackLocation->Parameters.DeviceIoControl.
1587 OutputBufferLength < sizeof(CDROM_TOC))
1588 {
1589 //
1590 // Invalid length
1591 //
1592 Status = STATUS_BUFFER_TOO_SMALL;
1593 break;
1594 }
1595
1596 //
1597 // Clear the TOC
1598 //
1599 Toc = Irp->AssociatedIrp.SystemBuffer;
1600 RtlZeroMemory(Toc, sizeof(CDROM_TOC));
1601
1602 //
1603 // Fill it out
1604 //
1605 Toc->Length[0] = 0;
1606 Toc->Length[1] = RAMDISK_TOC_SIZE - sizeof(Toc->Length);
1607 Toc->FirstTrack = 1;
1608 Toc->LastTrack = 1;
1609 Toc->TrackData[0].Adr = 1;
1610 Toc->TrackData[0].Control = TOC_DATA_TRACK;
1611 Toc->TrackData[0].TrackNumber = 1;
1612
1613 //
1614 // We're done
1615 //
1616 Status = STATUS_SUCCESS;
1617 Information = RAMDISK_TOC_SIZE;
1618 break;
1619
1620 case IOCTL_DISK_SET_PARTITION_INFO:
1621
1622 Status = RamdiskSetPartitionInfo(Irp, DriveExtension);
1623 break;
1624
1625 case IOCTL_DISK_GET_PARTITION_INFO:
1626
1627 //
1628 // Validate the length
1629 //
1630 if (IoStackLocation->Parameters.DeviceIoControl.
1631 OutputBufferLength < sizeof(PARTITION_INFORMATION))
1632 {
1633 //
1634 // Invalid length
1635 //
1636 Status = STATUS_BUFFER_TOO_SMALL;
1637 break;
1638 }
1639
1640 //
1641 // Check if we need to do this sync or async
1642 //
1643 if (DriveExtension->DiskType > RAMDISK_MEMORY_MAPPED_DISK)
1644 {
1645 //
1646 // Call the helper function
1647 //
1648 Status = RamdiskGetPartitionInfo(Irp, DriveExtension);
1649 }
1650 else
1651 {
1652 //
1653 // Do it asynchronously later
1654 //
1655 goto CallWorker;
1656 }
1657
1658 //
1659 // We're done
1660 //
1661 Information = Irp->IoStatus.Information;
1662 break;
1663
1664 case IOCTL_DISK_GET_DRIVE_LAYOUT:
1665
1666 UNIMPLEMENTED;
1667 while (TRUE);
1668 break;
1669
1670 case IOCTL_DISK_GET_LENGTH_INFO:
1671
1672 UNIMPLEMENTED;
1673 while (TRUE);
1674 break;
1675
1676 case IOCTL_DISK_IS_WRITABLE:
1677
1678 UNIMPLEMENTED;
1679 while (TRUE);
1680 break;
1681
1682 case IOCTL_SCSI_MINIPORT:
1683
1684 UNIMPLEMENTED;
1685 while (TRUE);
1686 break;
1687
1688 case IOCTL_STORAGE_QUERY_PROPERTY:
1689
1690 UNIMPLEMENTED;
1691 while (TRUE);
1692 break;
1693
1694 case IOCTL_MOUNTDEV_QUERY_UNIQUE_ID:
1695
1696 UNIMPLEMENTED;
1697 while (TRUE);
1698 break;
1699
1700 case IOCTL_MOUNTDEV_QUERY_STABLE_GUID:
1701
1702 UNIMPLEMENTED;
1703 while (TRUE);
1704 break;
1705
1706 case IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS:
1707
1708 UNIMPLEMENTED;
1709 while (TRUE);
1710 break;
1711
1712 case IOCTL_VOLUME_SET_GPT_ATTRIBUTES:
1713
1714 UNIMPLEMENTED;
1715 while (TRUE);
1716 break;
1717
1718 case IOCTL_VOLUME_GET_GPT_ATTRIBUTES:
1719
1720 UNIMPLEMENTED;
1721 while (TRUE);
1722 break;
1723
1724 case IOCTL_VOLUME_OFFLINE:
1725
1726 UNIMPLEMENTED;
1727 while (TRUE);
1728 break;
1729
1730 default:
1731
1732 //
1733 // Drive code not emulated
1734 //
1735 DPRINT1("IOCTL: %lx\n", IoStackLocation->Parameters.DeviceIoControl.IoControlCode);
1736 break;
1737 }
1738
1739 //
1740 // If requests drop down here, we just return them complete them
1741 //
1742 goto CompleteRequest;
1743 }
1744
1745 //
1746 // Queue the request to our worker thread
1747 //
1748 CallWorker:
1749 Status = SendIrpToThread(DeviceObject, Irp);
1750
1751 CompleteRequest:
1752 //
1753 // Release the lock
1754 //
1755 IoReleaseRemoveLock(&DeviceExtension->RemoveLock, Irp);
1756 if (Status != STATUS_PENDING)
1757 {
1758 //
1759 // Complete the request
1760 //
1761 Irp->IoStatus.Status = Status;
1762 Irp->IoStatus.Information = Information;
1763 IoCompleteRequest(Irp, IO_NO_INCREMENT);
1764 }
1765
1766 //
1767 // Return status
1768 //
1769 return Status;
1770 }
1771
1772 NTSTATUS
1773 NTAPI
1774 RamdiskQueryDeviceRelations(IN DEVICE_RELATION_TYPE Type,
1775 IN PDEVICE_OBJECT DeviceObject,
1776 IN PIRP Irp)
1777 {
1778 PRAMDISK_BUS_EXTENSION DeviceExtension;
1779 PRAMDISK_DRIVE_EXTENSION DriveExtension;
1780 PDEVICE_RELATIONS DeviceRelations, OurDeviceRelations;
1781 ULONG Count, DiskCount, FinalCount;
1782 PLIST_ENTRY ListHead, NextEntry;
1783 PDEVICE_OBJECT* DriveDeviceObject;
1784 RAMDISK_DEVICE_STATE State;
1785
1786 //
1787 // Get the device extension and check if this is a drive
1788 //
1789 DeviceExtension = DeviceObject->DeviceExtension;
1790 if (DeviceExtension->Type == RamdiskDrive)
1791 {
1792 //
1793 // FIXME: TODO
1794 //
1795 UNIMPLEMENTED;
1796 while (TRUE);
1797 }
1798
1799 //
1800 // Anything but bus relations, we don't handle
1801 //
1802 if (Type) goto PassToNext;
1803
1804 //
1805 // Acquire the disk list lock
1806 //
1807 KeEnterCriticalRegion();
1808 ExAcquireFastMutex(&DeviceExtension->DiskListLock);
1809
1810 //
1811 // Did a device already fill relations?
1812 //
1813 DeviceRelations = (PDEVICE_RELATIONS)Irp->IoStatus.Information;
1814 if (DeviceRelations)
1815 {
1816 //
1817 // Use the data
1818 //
1819 Count = DeviceRelations->Count;
1820 }
1821 else
1822 {
1823 //
1824 // We're the first
1825 //
1826 Count = 0;
1827 }
1828
1829 //
1830 // Now loop our drives
1831 //
1832 DiskCount = 0;
1833 ListHead = &DeviceExtension->DiskList;
1834 NextEntry = ListHead->Flink;
1835 while (NextEntry != ListHead)
1836 {
1837 //
1838 // As long as it wasn't removed, count it in
1839 //
1840 DriveExtension = CONTAINING_RECORD(NextEntry,
1841 RAMDISK_DRIVE_EXTENSION,
1842 DiskList);
1843 if (DriveExtension->State < RamdiskStateBusRemoved) DiskCount++;
1844
1845 //
1846 // Move to the next one
1847 //
1848 NextEntry = NextEntry->Flink;
1849 }
1850
1851 //
1852 // Now we know our final count
1853 //
1854 FinalCount = Count + DiskCount;
1855
1856 //
1857 // Allocate the structure
1858 //
1859 OurDeviceRelations = ExAllocatePoolWithTag(PagedPool,
1860 FIELD_OFFSET(DEVICE_RELATIONS,
1861 Objects) +
1862 FinalCount *
1863 sizeof(PDEVICE_OBJECT),
1864 'dmaR');
1865 if (!OurDeviceRelations)
1866 {
1867 //
1868 // Fail
1869 //
1870 ExReleaseFastMutex(&DeviceExtension->DiskListLock);
1871 KeLeaveCriticalRegion();
1872 Irp->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES;
1873 IoCompleteRequest(Irp, IO_NO_INCREMENT);
1874 return STATUS_INSUFFICIENT_RESOURCES;
1875 }
1876
1877 //
1878 // Check if we already had some relations
1879 //
1880 if (Count)
1881 {
1882 //
1883 // Copy them in
1884 //
1885 RtlCopyMemory(OurDeviceRelations->Objects,
1886 DeviceRelations->Objects,
1887 Count * sizeof(PDEVICE_OBJECT));
1888 }
1889
1890 //
1891 // Save the count
1892 //
1893 OurDeviceRelations->Count = FinalCount;
1894
1895 //
1896 // Now loop our drives again
1897 //
1898 ListHead = &DeviceExtension->DiskList;
1899 NextEntry = ListHead->Flink;
1900 while (NextEntry != ListHead)
1901 {
1902 //
1903 // Go to the end of the list
1904 //
1905 DriveDeviceObject = &OurDeviceRelations->Objects[Count];
1906
1907 //
1908 // Get the drive state
1909 //
1910 DriveExtension = CONTAINING_RECORD(NextEntry,
1911 RAMDISK_DRIVE_EXTENSION,
1912 DiskList);
1913 State = DriveExtension->State;
1914
1915 //
1916 // If it was removed or enumerated, we don't touch the device object
1917 //
1918 if (State >= RamdiskStateBusRemoved)
1919 {
1920 //
1921 // If it was removed, we still have to keep track of this though
1922 //
1923 if (State == RamdiskStateBusRemoved)
1924 {
1925 //
1926 // Mark it as enumerated now, but don't actually reference it
1927 //
1928 DriveExtension->State = RamdiskStateEnumerated;
1929 }
1930 }
1931 else
1932 {
1933 //
1934 // First time it's enumerated, reference the device object
1935 //
1936 ObReferenceObject(DriveExtension->DeviceObject);
1937
1938 //
1939 // Save the object pointer, and move on
1940 //
1941 *DriveDeviceObject++ = DriveExtension->DeviceObject;
1942 }
1943
1944 if (DriveExtension->State < RamdiskStateBusRemoved) DiskCount++;
1945
1946 //
1947 // Move to the next one
1948 //
1949 NextEntry = NextEntry->Flink;
1950 }
1951
1952 //
1953 // Release the lock
1954 //
1955 ExReleaseFastMutex(&DeviceExtension->DiskListLock);
1956 KeLeaveCriticalRegion();
1957
1958 //
1959 // Cleanup old relations
1960 //
1961 if (DeviceRelations) ExFreePool(DeviceRelations);
1962
1963 //
1964 // Complete our IRP
1965 //
1966 Irp->IoStatus.Information = (ULONG_PTR)OurDeviceRelations;
1967 Irp->IoStatus.Status = STATUS_SUCCESS;
1968
1969 //
1970 // Pass to the next driver
1971 //
1972 PassToNext:
1973 IoCopyCurrentIrpStackLocationToNext(Irp);
1974 return IoCallDriver(DeviceExtension->AttachedDevice, Irp);
1975 }
1976
1977 NTSTATUS
1978 NTAPI
1979 RamdiskDeleteDiskDevice(IN PDEVICE_OBJECT DeviceObject,
1980 IN PIRP Irp)
1981 {
1982 UNIMPLEMENTED;
1983 while (TRUE);
1984 return STATUS_SUCCESS;
1985 }
1986
1987 NTSTATUS
1988 NTAPI
1989 RamdiskRemoveBusDevice(IN PDEVICE_OBJECT DeviceObject,
1990 IN PIRP Irp)
1991 {
1992 NTSTATUS Status;
1993 PLIST_ENTRY ListHead, NextEntry;
1994 PRAMDISK_BUS_EXTENSION DeviceExtension;
1995 PRAMDISK_DRIVE_EXTENSION DriveExtension;
1996
1997 DeviceExtension = DeviceObject->DeviceExtension;
1998
1999 //
2000 // Acquire disks list lock
2001 //
2002 KeEnterCriticalRegion();
2003 ExAcquireFastMutex(&DeviceExtension->DiskListLock);
2004
2005 //
2006 // Loop over drives
2007 //
2008 ListHead = &DeviceExtension->DiskList;
2009 NextEntry = ListHead->Flink;
2010 while (NextEntry != ListHead)
2011 {
2012 DriveExtension = CONTAINING_RECORD(NextEntry,
2013 RAMDISK_DRIVE_EXTENSION,
2014 DiskList);
2015
2016 //
2017 // Delete the disk
2018 //
2019 IoAcquireRemoveLock(&DriveExtension->RemoveLock, NULL);
2020 RamdiskDeleteDiskDevice(DriveExtension->PhysicalDeviceObject, NULL);
2021
2022 //
2023 // RamdiskDeleteDiskDevice releases list lock, so reacquire it
2024 //
2025 KeEnterCriticalRegion();
2026 ExAcquireFastMutex(&DeviceExtension->DiskListLock);
2027 }
2028
2029 //
2030 // Release disks list lock
2031 //
2032 ExReleaseFastMutex(&DeviceExtension->DiskListLock);
2033 KeLeaveCriticalRegion();
2034
2035 //
2036 // Prepare to pass to the lower driver
2037 //
2038 IoSkipCurrentIrpStackLocation(Irp);
2039 //
2040 // Here everything went fine
2041 //
2042 Irp->IoStatus.Status = STATUS_SUCCESS;
2043
2044 //
2045 // Call lower driver
2046 //
2047 Status = IoCallDriver(DeviceExtension->AttachedDevice, Irp);
2048
2049 //
2050 // Update state
2051 //
2052 DeviceExtension->State = RamdiskStateBusRemoved;
2053
2054 //
2055 // Release the lock, and ensure that everyone
2056 // has finished its job before we continue
2057 // The lock has been acquired by the dispatcher
2058 //
2059 IoReleaseRemoveLockAndWait(&DeviceExtension->RemoveLock, Irp);
2060
2061 //
2062 // If there's a drive name
2063 //
2064 if (DeviceExtension->DriveDeviceName.Buffer)
2065 {
2066 //
2067 // Inform it's going to be disabled
2068 // and free the drive name
2069 //
2070 IoSetDeviceInterfaceState(&DeviceExtension->DriveDeviceName, FALSE);
2071 RtlFreeUnicodeString(&DeviceExtension->DriveDeviceName);
2072 }
2073
2074 //
2075 // Part from the stack, detach from lower device
2076 //
2077 IoDetachDevice(DeviceExtension->AttachedDevice);
2078
2079 //
2080 // Finally, delete device
2081 //
2082 RamdiskBusFdo = NULL;
2083 IoDeleteDevice(DeviceObject);
2084
2085 //
2086 // Return status from lower driver
2087 //
2088 return Status;
2089 }
2090
2091 NTSTATUS
2092 NTAPI
2093 RamdiskPnp(IN PDEVICE_OBJECT DeviceObject,
2094 IN PIRP Irp)
2095 {
2096 PIO_STACK_LOCATION IoStackLocation;
2097 PRAMDISK_BUS_EXTENSION DeviceExtension;
2098 NTSTATUS Status;
2099 UCHAR Minor;
2100
2101 //
2102 // Get the device extension and stack location
2103 //
2104 DeviceExtension = DeviceObject->DeviceExtension;
2105 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
2106 Minor = IoStackLocation->MinorFunction;
2107
2108 //
2109 // Check if the bus is removed
2110 //
2111 if (DeviceExtension->State == RamdiskStateBusRemoved)
2112 {
2113 //
2114 // Only remove-device and query-id are allowed
2115 //
2116 if ((Minor != IRP_MN_REMOVE_DEVICE) && (Minor != IRP_MN_QUERY_ID))
2117 {
2118 //
2119 // Fail anything else
2120 //
2121 Status = STATUS_NO_SUCH_DEVICE;
2122 Irp->IoStatus.Status = Status;
2123 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2124 return Status;
2125 }
2126 }
2127
2128 //
2129 // Acquire the remove lock
2130 //
2131 Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Irp);
2132 if (!NT_SUCCESS(Status))
2133 {
2134 //
2135 // Fail the IRP
2136 //
2137 Irp->IoStatus.Information = 0;
2138 Irp->IoStatus.Status = Status;
2139 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2140 return Status;
2141 }
2142
2143 //
2144 // Query the IRP type
2145 //
2146 switch (Minor)
2147 {
2148 case IRP_MN_START_DEVICE:
2149
2150 DPRINT1("PnP IRP: %lx\n", Minor);
2151 while (TRUE);
2152 break;
2153
2154 case IRP_MN_QUERY_STOP_DEVICE:
2155
2156 DPRINT1("PnP IRP: %lx\n", Minor);
2157 while (TRUE);
2158 break;
2159
2160 case IRP_MN_CANCEL_STOP_DEVICE:
2161
2162 DPRINT1("PnP IRP: %lx\n", Minor);
2163 while (TRUE);
2164 break;
2165
2166 case IRP_MN_STOP_DEVICE:
2167
2168 DPRINT1("PnP IRP: %lx\n", Minor);
2169 while (TRUE);
2170 break;
2171
2172 case IRP_MN_QUERY_REMOVE_DEVICE:
2173
2174 DPRINT1("PnP IRP: %lx\n", Minor);
2175 while (TRUE);
2176 break;
2177
2178 case IRP_MN_CANCEL_REMOVE_DEVICE:
2179
2180 DPRINT1("PnP IRP: %lx\n", Minor);
2181 while (TRUE);
2182 break;
2183
2184 case IRP_MN_REMOVE_DEVICE:
2185
2186 //
2187 // Remove the proper device
2188 //
2189 if (DeviceExtension->Type == RamdiskBus)
2190 {
2191 Status = RamdiskRemoveBusDevice(DeviceObject, Irp);
2192
2193 //
2194 // Return here, lower device has already been called
2195 // And remove lock released. This is needed by the function.
2196 //
2197 return Status;
2198 }
2199 else
2200 {
2201 Status = RamdiskDeleteDiskDevice(DeviceObject, Irp);
2202
2203 //
2204 // Complete the IRP here and return
2205 // Here again we don't have to release remove lock
2206 // This has already been done by the function.
2207 //
2208 Irp->IoStatus.Status = Status;
2209 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2210 return Status;
2211 }
2212
2213 case IRP_MN_SURPRISE_REMOVAL:
2214
2215 DPRINT1("PnP IRP: %lx\n", Minor);
2216 while (TRUE);
2217 break;
2218
2219 case IRP_MN_QUERY_ID:
2220
2221 //
2222 // Are we a drive?
2223 //
2224 if (DeviceExtension->Type == RamdiskDrive)
2225 {
2226 DPRINT1("PnP IRP: %lx\n", Minor);
2227 while (TRUE);
2228 }
2229 break;
2230
2231 case IRP_MN_QUERY_BUS_INFORMATION:
2232
2233 //
2234 // Are we a drive?
2235 //
2236 if (DeviceExtension->Type == RamdiskDrive)
2237 {
2238 DPRINT1("PnP IRP: %lx\n", Minor);
2239 while (TRUE);
2240 }
2241 break;
2242
2243 case IRP_MN_EJECT:
2244
2245 DPRINT1("PnP IRP: %lx\n", Minor);
2246 while (TRUE);
2247 break;
2248
2249 case IRP_MN_QUERY_DEVICE_TEXT:
2250
2251 //
2252 // Are we a drive?
2253 //
2254 if (DeviceExtension->Type == RamdiskDrive)
2255 {
2256 DPRINT1("PnP IRP: %lx\n", Minor);
2257 while (TRUE);
2258 }
2259 break;
2260
2261 case IRP_MN_QUERY_DEVICE_RELATIONS:
2262
2263 //
2264 // Call our main routine
2265 //
2266 Status = RamdiskQueryDeviceRelations(IoStackLocation->
2267 Parameters.
2268 QueryDeviceRelations.Type,
2269 DeviceObject,
2270 Irp);
2271 goto ReleaseAndReturn;
2272
2273 case IRP_MN_QUERY_CAPABILITIES:
2274
2275 //
2276 // Are we a drive?
2277 //
2278 if (DeviceExtension->Type == RamdiskDrive)
2279 {
2280 DPRINT1("PnP IRP: %lx\n", Minor);
2281 while (TRUE);
2282 }
2283 break;
2284
2285 case IRP_MN_QUERY_RESOURCES:
2286 case IRP_MN_QUERY_RESOURCE_REQUIREMENTS:
2287
2288 //
2289 // Complete immediately without touching it
2290 //
2291 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2292 goto ReleaseAndReturn;
2293
2294 default:
2295
2296 DPRINT1("Illegal IRP: %lx\n", Minor);
2297 break;
2298 }
2299
2300 //
2301 // Are we the bus?
2302 //
2303 if (DeviceExtension->Type == RamdiskBus)
2304 {
2305 //
2306 // Do we have an attached device?
2307 //
2308 if (DeviceExtension->AttachedDevice)
2309 {
2310 //
2311 // Forward the IRP
2312 //
2313 IoSkipCurrentIrpStackLocation(Irp);
2314 Status = IoCallDriver(DeviceExtension->AttachedDevice, Irp);
2315 }
2316 }
2317
2318 //
2319 // Release the lock and return status
2320 //
2321 ReleaseAndReturn:
2322 IoReleaseRemoveLock(&DeviceExtension->RemoveLock, Irp);
2323 return Status;
2324 }
2325
2326 NTSTATUS
2327 NTAPI
2328 RamdiskPower(IN PDEVICE_OBJECT DeviceObject,
2329 IN PIRP Irp)
2330 {
2331 NTSTATUS Status;
2332 PIO_STACK_LOCATION IoStackLocation;
2333 PRAMDISK_BUS_EXTENSION DeviceExtension;
2334
2335 DeviceExtension = DeviceObject->DeviceExtension;
2336
2337 //
2338 // If we have a device extension, take extra caution
2339 // with the lower driver
2340 //
2341 if (DeviceExtension != NULL)
2342 {
2343 PoStartNextPowerIrp(Irp);
2344
2345 //
2346 // Device has not been removed yet, so
2347 // pass to the attached/lower driver
2348 //
2349 if (DeviceExtension->State < RamdiskStateBusRemoved)
2350 {
2351 IoSkipCurrentIrpStackLocation(Irp);
2352 return PoCallDriver(DeviceExtension->AttachedDevice, Irp);
2353 }
2354 //
2355 // Otherwise, simply complete the IRP
2356 // Notifying that deletion is pending
2357 //
2358 else
2359 {
2360 Irp->IoStatus.Status = STATUS_DELETE_PENDING;
2361 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2362 return STATUS_DELETE_PENDING;
2363 }
2364 }
2365
2366 //
2367 // Get stack and deal with minor functions
2368 //
2369 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
2370 switch (IoStackLocation->MinorFunction)
2371 {
2372 case IRP_MN_SET_POWER:
2373 //
2374 // If setting device power state
2375 // it's all fine and return success
2376 //
2377 if (DevicePowerState)
2378 {
2379 Irp->IoStatus.Status = STATUS_SUCCESS;
2380 }
2381
2382 //
2383 // Get appropriate status for return
2384 //
2385 Status = Irp->IoStatus.Status;
2386 PoStartNextPowerIrp(Irp);
2387 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2388 break;
2389
2390 case IRP_MN_QUERY_POWER:
2391 //
2392 // We can obviously accept all states
2393 // So just return success
2394 //
2395 Status =
2396 Irp->IoStatus.Status = STATUS_SUCCESS;
2397 PoStartNextPowerIrp(Irp);
2398 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2399 break;
2400
2401 default:
2402 //
2403 // Just complete and save status for return
2404 //
2405 Status = Irp->IoStatus.Status;
2406 PoStartNextPowerIrp(Irp);
2407 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2408 break;
2409 }
2410
2411 return Status;
2412 }
2413
2414 NTSTATUS
2415 NTAPI
2416 RamdiskSystemControl(IN PDEVICE_OBJECT DeviceObject,
2417 IN PIRP Irp)
2418 {
2419 NTSTATUS Status;
2420 PRAMDISK_BUS_EXTENSION DeviceExtension;
2421
2422 DeviceExtension = DeviceObject->DeviceExtension;
2423
2424 //
2425 // If we have a device extension, forward the IRP
2426 // to the attached device
2427 //
2428 if (DeviceExtension != NULL)
2429 {
2430 IoSkipCurrentIrpStackLocation(Irp);
2431 Status = IoCallDriver(DeviceExtension->AttachedDevice, Irp);
2432 }
2433 //
2434 // Otherwise just complete the request
2435 // And return the status with which we complete it
2436 //
2437 else
2438 {
2439 Status = Irp->IoStatus.Status;
2440 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2441 }
2442
2443 return Status;
2444 }
2445
2446 NTSTATUS
2447 NTAPI
2448 RamdiskScsi(IN PDEVICE_OBJECT DeviceObject,
2449 IN PIRP Irp)
2450 {
2451 NTSTATUS Status;
2452 PRAMDISK_BUS_EXTENSION DeviceExtension;
2453
2454 DeviceExtension = DeviceObject->DeviceExtension;
2455
2456 //
2457 // Having a proper device is mandatory
2458 //
2459 if (DeviceExtension->State > RamdiskStateStopped)
2460 {
2461 Status = STATUS_DEVICE_DOES_NOT_EXIST;
2462 goto CompleteIRP;
2463 }
2464
2465 //
2466 // Acquire the remove lock
2467 //
2468 Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Irp);
2469 if (!NT_SUCCESS(Status))
2470 {
2471 goto CompleteIRP;
2472 }
2473
2474 //
2475 // Queue the IRP for worker
2476 //
2477 Status = SendIrpToThread(DeviceObject, Irp);
2478 if (Status != STATUS_PENDING)
2479 {
2480 goto CompleteIRP;
2481 }
2482
2483 //
2484 // Release the remove lock
2485 //
2486 IoReleaseRemoveLock(&DeviceExtension->RemoveLock, Irp);
2487 goto Quit;
2488
2489 CompleteIRP:
2490 Irp->IoStatus.Information = 0;
2491 Irp->IoStatus.Status = Status;
2492 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2493
2494 Quit:
2495 return Status;
2496 }
2497
2498 NTSTATUS
2499 NTAPI
2500 RamdiskFlushBuffers(IN PDEVICE_OBJECT DeviceObject,
2501 IN PIRP Irp)
2502 {
2503 NTSTATUS Status;
2504 PRAMDISK_DRIVE_EXTENSION DeviceExtension;
2505
2506 DeviceExtension = DeviceObject->DeviceExtension;
2507
2508 //
2509 // Ensure we have drive extension
2510 // Only perform flush on disks that have been created
2511 // from registry entries
2512 //
2513 if (DeviceExtension->Type != RamdiskDrive ||
2514 DeviceExtension->DiskType > RAMDISK_MEMORY_MAPPED_DISK)
2515 {
2516 Irp->IoStatus.Information = 0;
2517 Irp->IoStatus.Status = STATUS_SUCCESS;
2518 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2519 return STATUS_SUCCESS;
2520 }
2521
2522 //
2523 // Queue the IRP for worker
2524 //
2525 Status = SendIrpToThread(DeviceObject, Irp);
2526 if (Status != STATUS_PENDING)
2527 {
2528 //
2529 // Queueing failed - complete the IRP
2530 // and return failure
2531 //
2532 Irp->IoStatus.Information = 0;
2533 Irp->IoStatus.Status = Status;
2534 IoCompleteRequest(Irp, IO_NO_INCREMENT);
2535 }
2536
2537 return Status;
2538 }
2539
2540 VOID
2541 NTAPI
2542 RamdiskUnload(IN PDRIVER_OBJECT DriverObject)
2543 {
2544 //
2545 // Just release registry path if previously allocated
2546 //
2547 if (DriverRegistryPath.Buffer)
2548 {
2549 ExFreePoolWithTag(DriverRegistryPath.Buffer, 'dmaR');
2550 }
2551 }
2552
2553 NTSTATUS
2554 NTAPI
2555 RamdiskAddDevice(IN PDRIVER_OBJECT DriverObject,
2556 IN PDEVICE_OBJECT PhysicalDeviceObject)
2557 {
2558 PRAMDISK_BUS_EXTENSION DeviceExtension;
2559 PDEVICE_OBJECT AttachedDevice;
2560 NTSTATUS Status;
2561 UNICODE_STRING DeviceName;
2562 PDEVICE_OBJECT DeviceObject;
2563
2564 //
2565 // Only create the bus FDO once
2566 //
2567 if (RamdiskBusFdo) return STATUS_DEVICE_ALREADY_ATTACHED;
2568
2569 //
2570 // Create the bus FDO
2571 //
2572 RtlInitUnicodeString(&DeviceName, L"\\Device\\Ramdisk");
2573 Status = IoCreateDevice(DriverObject,
2574 sizeof(RAMDISK_BUS_EXTENSION),
2575 &DeviceName,
2576 FILE_DEVICE_BUS_EXTENDER,
2577 FILE_DEVICE_SECURE_OPEN,
2578 0,
2579 &DeviceObject);
2580 if (NT_SUCCESS(Status))
2581 {
2582 //
2583 // Initialize the bus FDO extension
2584 //
2585 DeviceExtension = DeviceObject->DeviceExtension;
2586 RtlZeroMemory(DeviceObject->DeviceExtension,
2587 sizeof(RAMDISK_BUS_EXTENSION));
2588
2589 //
2590 // Set bus FDO flags
2591 //
2592 DeviceObject->Flags |= DO_POWER_PAGABLE | DO_DIRECT_IO;
2593
2594 //
2595 // Setup the bus FDO extension
2596 //
2597 DeviceExtension->Type = RamdiskBus;
2598 ExInitializeFastMutex(&DeviceExtension->DiskListLock);
2599 IoInitializeRemoveLock(&DeviceExtension->RemoveLock,
2600 'dmaR',
2601 0,
2602 1);
2603 InitializeListHead(&DeviceExtension->DiskList);
2604 DeviceExtension->PhysicalDeviceObject = PhysicalDeviceObject;
2605 DeviceExtension->DeviceObject = DeviceObject;
2606
2607 //
2608 // Register the RAM disk device interface
2609 //
2610 Status = IoRegisterDeviceInterface(PhysicalDeviceObject,
2611 &RamdiskBusInterface,
2612 NULL,
2613 &DeviceExtension->BusDeviceName);
2614 if (!NT_SUCCESS(Status))
2615 {
2616 //
2617 // Fail
2618 //
2619 IoDeleteDevice(DeviceObject);
2620 return Status;
2621 }
2622
2623 //
2624 // Attach us to the device stack
2625 //
2626 AttachedDevice = IoAttachDeviceToDeviceStack(DeviceObject,
2627 PhysicalDeviceObject);
2628 DeviceExtension->AttachedDevice = AttachedDevice;
2629 if (!AttachedDevice)
2630 {
2631 //
2632 // Fail
2633 //
2634 IoSetDeviceInterfaceState(&DeviceExtension->BusDeviceName, 0);
2635 RtlFreeUnicodeString(&DeviceExtension->BusDeviceName);
2636 IoDeleteDevice(DeviceObject);
2637 return STATUS_NO_SUCH_DEVICE;
2638 }
2639
2640 //
2641 // Bus FDO is initialized
2642 //
2643 RamdiskBusFdo = DeviceObject;
2644
2645 //
2646 // Loop for loader block
2647 //
2648 if (KeLoaderBlock)
2649 {
2650 //
2651 // Are we being booted from setup? Not yet supported
2652 //
2653 //ASSERT(!KeLoaderBlock->SetupLdrBlock);
2654 }
2655
2656 //
2657 // All done
2658 //
2659 DeviceObject->Flags &= DO_DEVICE_INITIALIZING;
2660 Status = STATUS_SUCCESS;
2661 }
2662
2663 //
2664 // Return status
2665 //
2666 return Status;
2667 }
2668
2669 NTSTATUS
2670 NTAPI
2671 DriverEntry(IN PDRIVER_OBJECT DriverObject,
2672 IN PUNICODE_STRING RegistryPath)
2673 {
2674 PCHAR BootDeviceName, CommandLine;
2675 PDEVICE_OBJECT PhysicalDeviceObject = NULL;
2676 NTSTATUS Status;
2677 DPRINT("RAM Disk Driver Initialized\n");
2678
2679 //
2680 // Query ramdisk parameters
2681 //
2682 QueryParameters(RegistryPath);
2683
2684 //
2685 // Save the registry path
2686 //
2687 DriverRegistryPath = *RegistryPath;
2688 DriverRegistryPath.Buffer = ExAllocatePoolWithTag(PagedPool,
2689 RegistryPath->Length +
2690 sizeof(WCHAR),
2691 'dmaR');
2692 if (!DriverRegistryPath.Buffer) return STATUS_INSUFFICIENT_RESOURCES;
2693 RtlCopyUnicodeString(&DriverRegistryPath, RegistryPath);
2694
2695 //
2696 // Set device routines
2697 //
2698 DriverObject->MajorFunction[IRP_MJ_CREATE] = RamdiskOpenClose;
2699 DriverObject->MajorFunction[IRP_MJ_CLOSE] = RamdiskOpenClose;
2700 DriverObject->MajorFunction[IRP_MJ_READ] = RamdiskReadWrite;
2701 DriverObject->MajorFunction[IRP_MJ_WRITE] = RamdiskReadWrite;
2702 DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = RamdiskDeviceControl;
2703 DriverObject->MajorFunction[IRP_MJ_PNP] = RamdiskPnp;
2704 DriverObject->MajorFunction[IRP_MJ_POWER] = RamdiskPower;
2705 DriverObject->MajorFunction[IRP_MJ_SYSTEM_CONTROL] = RamdiskSystemControl;
2706 DriverObject->MajorFunction[IRP_MJ_SCSI] = RamdiskScsi;
2707 DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = RamdiskFlushBuffers;
2708 DriverObject->DriverExtension->AddDevice = RamdiskAddDevice;
2709 DriverObject->DriverUnload = RamdiskUnload;
2710
2711 //
2712 // Check for a loader block
2713 //
2714 if (KeLoaderBlock)
2715 {
2716 //
2717 // Get the boot device name
2718 //
2719 BootDeviceName = KeLoaderBlock->ArcBootDeviceName;
2720 if (BootDeviceName)
2721 {
2722 //
2723 // Check if we're booting from ramdisk
2724 //
2725 if ((strlen(BootDeviceName) >= 10) &&
2726 !(_strnicmp(BootDeviceName, "ramdisk(0)", 10)))
2727 {
2728 //
2729 // We'll have to tell the PnP Manager
2730 //
2731 ReportDetectedDevice = TRUE;
2732
2733 //
2734 // Check for a command line
2735 //
2736 CommandLine = KeLoaderBlock->LoadOptions;
2737 if (CommandLine)
2738 {
2739 //
2740 // Check if this is an ISO boot
2741 //
2742 if (strstr(CommandLine, "RDEXPORTASCD"))
2743 {
2744 //
2745 // Remember for later
2746 //
2747 ExportBootDiskAsCd = TRUE;
2748 }
2749
2750 //
2751 // Check if this is PE boot
2752 //
2753 if (strstr(CommandLine, "MININT"))
2754 {
2755 //
2756 // Remember for later
2757 //
2758 IsWinPEBoot = TRUE;
2759 }
2760 }
2761 }
2762
2763 }
2764 }
2765
2766 //
2767 // Installing from Ramdisk isn't supported yet
2768 //
2769 //ASSERT(!KeLoaderBlock->SetupLdrBlock);
2770
2771 //
2772 // Are we reporting the device
2773 //
2774 if (ReportDetectedDevice)
2775 {
2776 //
2777 // Do it
2778 //
2779 Status = IoReportDetectedDevice(DriverObject,
2780 InterfaceTypeUndefined,
2781 0xFFFFFFFF,
2782 0xFFFFFFFF,
2783 NULL,
2784 NULL,
2785 0,
2786 &PhysicalDeviceObject);
2787 if (NT_SUCCESS(Status))
2788 {
2789 //
2790 // Create the device object
2791 //
2792 Status = RamdiskAddDevice(DriverObject, PhysicalDeviceObject);
2793 if (NT_SUCCESS(Status))
2794 {
2795 //
2796 // We're done
2797 //
2798 PhysicalDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
2799 Status = STATUS_SUCCESS;
2800 }
2801 }
2802 }
2803 else
2804 {
2805 //
2806 // Done
2807 //
2808 Status = STATUS_SUCCESS;
2809 }
2810
2811 //
2812 // Done
2813 //
2814 return Status;
2815 }