3 * Copyright (C) 2001, 2002 ReactOS Team
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 /* $Id: disk.c,v 1.11 2002/03/22 20:35:09 ekohl Exp $
21 * COPYRIGHT: See COPYING in the top level directory
22 * PROJECT: ReactOS kernel
23 * FILE: services/storage/disk/disk.c
24 * PURPOSE: disk class driver
25 * PROGRAMMER: Eric Kohl (ekohl@rz-online.de)
28 /* INCLUDES *****************************************************************/
30 #include <ddk/ntddk.h>
32 #include "../include/scsi.h"
33 #include "../include/class2.h"
34 #include "../include/ntddscsi.h"
39 #define VERSION "0.0.1"
42 typedef struct _DISK_DATA
45 ULONG PartitionNumber
;
47 BOOLEAN BootIndicator
;
48 BOOLEAN DriveNotReady
;
49 } DISK_DATA
, *PDISK_DATA
;
53 DiskClassFindDevices(PDRIVER_OBJECT DriverObject
,
54 PUNICODE_STRING RegistryPath
,
55 PCLASS_INIT_DATA InitializationData
,
56 PDEVICE_OBJECT PortDeviceObject
,
60 DiskClassCheckDevice(IN PINQUIRYDATA InquiryData
);
63 DiskClassCheckReadWrite(IN PDEVICE_OBJECT DeviceObject
,
68 DiskClassCreateDeviceObject(IN PDRIVER_OBJECT DriverObject
,
69 IN PUNICODE_STRING RegistryPath
, /* what's this used for? */
70 IN PDEVICE_OBJECT PortDeviceObject
,
73 IN PIO_SCSI_CAPABILITIES Capabilities
,
74 IN PSCSI_INQUIRY_DATA InquiryData
,
75 IN PCLASS_INIT_DATA InitializationData
);
78 DiskClassDeviceControl(IN PDEVICE_OBJECT DeviceObject
,
82 DiskClassShutdownFlush(IN PDEVICE_OBJECT DeviceObject
,
87 /* FUNCTIONS ****************************************************************/
92 // This function initializes the driver, locates and claims
93 // hardware resources, and creates various NT objects needed
94 // to process I/O requests.
100 // IN PDRIVER_OBJECT DriverObject System allocated Driver Object
102 // IN PUNICODE_STRING RegistryPath Name of registry driver service
109 DriverEntry(IN PDRIVER_OBJECT DriverObject
,
110 IN PUNICODE_STRING RegistryPath
)
112 CLASS_INIT_DATA InitData
;
114 DbgPrint("Disk Class Driver %s\n",
116 DPRINT("RegistryPath '%wZ'\n",
119 RtlZeroMemory(&InitData
,
120 sizeof(CLASS_INIT_DATA
));
122 InitData
.InitializationDataSize
= sizeof(CLASS_INIT_DATA
);
123 InitData
.DeviceExtensionSize
= sizeof(DEVICE_EXTENSION
) + sizeof(DISK_DATA
);
124 InitData
.DeviceType
= FILE_DEVICE_DISK
;
125 InitData
.DeviceCharacteristics
= 0;
127 InitData
.ClassError
= NULL
; // DiskClassProcessError;
128 InitData
.ClassReadWriteVerification
= DiskClassCheckReadWrite
;
129 InitData
.ClassFindDeviceCallBack
= DiskClassCheckDevice
;
130 InitData
.ClassFindDevices
= DiskClassFindDevices
;
131 InitData
.ClassDeviceControl
= DiskClassDeviceControl
;
132 InitData
.ClassShutdownFlush
= DiskClassShutdownFlush
;
133 InitData
.ClassCreateClose
= NULL
;
134 InitData
.ClassStartIo
= NULL
;
136 return(ScsiClassInitialize(DriverObject
,
142 /**********************************************************************
144 * DiskClassFindDevices
147 * This function searches for device that are attached to the
155 * System allocated Driver Object for this driver
158 * Name of registry driver service key
161 * Pointer to the main initialization data
164 * Pointer to the port Device Object
170 * TRUE: At least one disk drive was found
171 * FALSE: No disk drive found
175 DiskClassFindDevices(PDRIVER_OBJECT DriverObject
,
176 PUNICODE_STRING RegistryPath
,
177 PCLASS_INIT_DATA InitializationData
,
178 PDEVICE_OBJECT PortDeviceObject
,
181 PCONFIGURATION_INFORMATION ConfigInfo
;
182 PIO_SCSI_CAPABILITIES PortCapabilities
;
183 PSCSI_ADAPTER_BUS_INFO AdapterBusInfo
;
184 PSCSI_INQUIRY_DATA UnitInfo
;
185 PINQUIRYDATA InquiryData
;
192 DPRINT("DiskClassFindDevices() called.\n");
194 /* Get port capabilities */
195 Status
= ScsiClassGetCapabilities(PortDeviceObject
,
197 if (!NT_SUCCESS(Status
))
199 DPRINT("ScsiClassGetCapabilities() failed! (Status 0x%lX)\n", Status
);
203 DPRINT("MaximumTransferLength: %lu\n", PortCapabilities
->MaximumTransferLength
);
205 /* Get inquiry data */
206 Status
= ScsiClassGetInquiryData(PortDeviceObject
,
207 (PSCSI_ADAPTER_BUS_INFO
*)&Buffer
);
208 if (!NT_SUCCESS(Status
))
210 DPRINT("ScsiClassGetInquiryData() failed! (Status %x)\n", Status
);
214 /* Check whether there are unclaimed devices */
215 AdapterBusInfo
= (PSCSI_ADAPTER_BUS_INFO
)Buffer
;
216 DeviceCount
= ScsiClassFindUnclaimedDevices(InitializationData
,
218 if (DeviceCount
== 0)
220 DPRINT1("No unclaimed devices!\n");
224 DPRINT("Found %lu unclaimed devices!\n", DeviceCount
);
226 ConfigInfo
= IoGetConfigurationInformation();
228 /* Search each bus of this adapter */
229 for (Bus
= 0; Bus
< (ULONG
)AdapterBusInfo
->NumberOfBuses
; Bus
++)
231 DPRINT("Searching bus %lu\n", Bus
);
233 UnitInfo
= (PSCSI_INQUIRY_DATA
)(Buffer
+ AdapterBusInfo
->BusData
[Bus
].InquiryDataOffset
);
235 while (AdapterBusInfo
->BusData
[Bus
].InquiryDataOffset
)
237 InquiryData
= (PINQUIRYDATA
)UnitInfo
->InquiryData
;
239 if (((InquiryData
->DeviceType
== DIRECT_ACCESS_DEVICE
) ||
240 (InquiryData
->DeviceType
== OPTICAL_DEVICE
)) &&
241 (InquiryData
->DeviceTypeQualifier
== 0) &&
242 (UnitInfo
->DeviceClaimed
== FALSE
))
244 DPRINT("Vendor: '%.24s'\n",
245 InquiryData
->VendorId
);
247 /* Create device objects for disk */
248 Status
= DiskClassCreateDeviceObject(DriverObject
,
252 ConfigInfo
->DiskCount
,
256 if (NT_SUCCESS(Status
))
258 ConfigInfo
->DiskCount
++;
263 if (UnitInfo
->NextInquiryDataOffset
== 0)
266 UnitInfo
= (PSCSI_INQUIRY_DATA
)(Buffer
+ UnitInfo
->NextInquiryDataOffset
);
271 ExFreePool(PortCapabilities
);
273 DPRINT("DiskClassFindDevices() done\n");
279 /**********************************************************************
281 * DiskClassCheckDevice
284 * This function checks the InquiryData for the correct device
285 * type and qualifier.
292 * Pointer to the inquiry data for the device in question.
295 * TRUE: A disk device was found.
300 DiskClassCheckDevice(IN PINQUIRYDATA InquiryData
)
302 return((InquiryData
->DeviceType
== DIRECT_ACCESS_DEVICE
||
303 InquiryData
->DeviceType
== OPTICAL_DEVICE
) &&
304 InquiryData
->DeviceTypeQualifier
== 0);
308 /**********************************************************************
310 * DiskClassCheckReadWrite
313 * This function checks the given IRP for correct data.
320 * Pointer to the device.
326 * STATUS_SUCCESS: The IRP matches the requirements of the given device.
331 DiskClassCheckReadWrite(IN PDEVICE_OBJECT DeviceObject
,
334 PDEVICE_EXTENSION DeviceExtension
;
337 DPRINT1("DiskClassCheckReadWrite() called\n");
339 DeviceExtension
= DeviceObject
->DeviceExtension
;
340 DiskData
= (PDISK_DATA
)(DeviceExtension
+ 1);
342 if (DiskData
->DriveNotReady
== TRUE
)
344 Irp
->IoStatus
.Status
= STATUS_DEVICE_NOT_READY
;
345 IoSetHardErrorOrVerifyDevice(Irp
,
347 return(STATUS_INVALID_PARAMETER
);
350 return(STATUS_SUCCESS
);
354 // DiskClassCreateDeviceObject
357 // Create the raw device and any partition devices on this drive
363 // IN PDRIVER_OBJECT DriverObject The system created driver object
364 // IN PCONTROLLER_OBJECT ControllerObject
365 // IN PIDE_CONTROLLER_EXTENSION ControllerExtension
366 // The IDE controller extension for
368 // IN int DriveIdx The index of the drive on this
370 // IN int HarddiskIdx The NT device number for this
374 // TRUE Drive exists and devices were created
375 // FALSE no devices were created for this device
379 DiskClassCreateDeviceObject(IN PDRIVER_OBJECT DriverObject
,
380 IN PUNICODE_STRING RegistryPath
, /* what's this used for? */
381 IN PDEVICE_OBJECT PortDeviceObject
,
384 IN PIO_SCSI_CAPABILITIES Capabilities
,
385 IN PSCSI_INQUIRY_DATA InquiryData
,
386 IN PCLASS_INIT_DATA InitializationData
)
388 OBJECT_ATTRIBUTES ObjectAttributes
;
389 UNICODE_STRING UnicodeDeviceDirName
;
390 WCHAR NameBuffer
[80];
391 CHAR NameBuffer2
[80];
392 PDEVICE_OBJECT DiskDeviceObject
;
393 PDEVICE_OBJECT PartitionDeviceObject
;
394 PDEVICE_EXTENSION DiskDeviceExtension
; /* defined in class2.h */
395 PDEVICE_EXTENSION PartitionDeviceExtension
; /* defined in class2.h */
396 PDRIVE_LAYOUT_INFORMATION PartitionList
= NULL
;
398 PPARTITION_INFORMATION PartitionEntry
;
400 ULONG PartitionNumber
;
403 DPRINT("DiskClassCreateDeviceObject() called\n");
405 /* Create the harddisk device directory */
407 L
"\\Device\\Harddisk%lu",
409 RtlInitUnicodeString(&UnicodeDeviceDirName
,
411 InitializeObjectAttributes(&ObjectAttributes
,
412 &UnicodeDeviceDirName
,
416 Status
= ZwCreateDirectoryObject(&Handle
,
419 if (!NT_SUCCESS(Status
))
421 DbgPrint("Could not create device dir object\n");
425 /* Claim the disk device */
426 Status
= ScsiClassClaimDevice(PortDeviceObject
,
430 if (!NT_SUCCESS(Status
))
432 DbgPrint("Could not claim disk device\n");
434 ZwMakeTemporaryObject(Handle
);
440 /* Create disk device (Partition 0) */
442 "\\Device\\Harddisk%lu\\Partition0",
445 Status
= ScsiClassCreateDeviceObject(DriverObject
,
450 if (!NT_SUCCESS(Status
))
452 DPRINT1("ScsiClassCreateDeviceObject() failed (Status %x)\n", Status
);
454 /* Release (unclaim) the disk */
455 ScsiClassClaimDevice(PortDeviceObject
,
460 /* Delete the harddisk device directory */
461 ZwMakeTemporaryObject(Handle
);
467 DiskDeviceObject
->Flags
|= DO_DIRECT_IO
;
468 if (((PINQUIRYDATA
)InquiryData
->InquiryData
)->RemovableMedia
)
470 DiskDeviceObject
->Characteristics
|= FILE_REMOVABLE_MEDIA
;
472 DiskDeviceObject
->StackSize
= (CCHAR
)PortDeviceObject
->StackSize
+ 1;
474 if (PortDeviceObject
->AlignmentRequirement
> DiskDeviceObject
->AlignmentRequirement
)
476 DiskDeviceObject
->AlignmentRequirement
= PortDeviceObject
->AlignmentRequirement
;
479 DiskDeviceExtension
= DiskDeviceObject
->DeviceExtension
;
480 DiskDeviceExtension
->LockCount
= 0;
481 DiskDeviceExtension
->DeviceNumber
= DiskNumber
;
482 DiskDeviceExtension
->PortDeviceObject
= PortDeviceObject
;
483 DiskDeviceExtension
->PhysicalDevice
= DiskDeviceObject
;
485 /* FIXME: Not yet! Will cause pointer corruption! */
486 // DiskDeviceExtension->PortCapabilities = PortCapabilities;
488 DiskDeviceExtension
->StartingOffset
.QuadPart
= 0;
489 DiskDeviceExtension
->PortNumber
= (UCHAR
)PortNumber
;
490 DiskDeviceExtension
->PathId
= InquiryData
->PathId
;
491 DiskDeviceExtension
->TargetId
= InquiryData
->TargetId
;
492 DiskDeviceExtension
->Lun
= InquiryData
->Lun
;
494 /* zero-out disk data */
495 DiskData
= (PDISK_DATA
)(DiskDeviceExtension
+ 1);
496 RtlZeroMemory(DiskData
,
499 /* Get disk geometry */
500 DiskDeviceExtension
->DiskGeometry
= ExAllocatePool(NonPagedPool
,
501 sizeof(DISK_GEOMETRY
));
502 if (DiskDeviceExtension
->DiskGeometry
== NULL
)
504 DPRINT1("Failed to allocate geometry buffer!\n");
506 IoDeleteDevice(DiskDeviceObject
);
508 /* Release (unclaim) the disk */
509 ScsiClassClaimDevice(PortDeviceObject
,
514 /* Delete the harddisk device directory */
515 ZwMakeTemporaryObject(Handle
);
518 return(STATUS_INSUFFICIENT_RESOURCES
);
521 /* Read the drive's capacity */
522 Status
= ScsiClassReadDriveCapacity(DiskDeviceObject
);
523 if (!NT_SUCCESS(Status
) &&
524 (DiskDeviceObject
->Characteristics
& FILE_REMOVABLE_MEDIA
) == 0)
526 DPRINT1("Failed to retrieve drive capacity!\n");
527 return(STATUS_SUCCESS
);
531 /* Clear the verify flag for removable media drives. */
532 DiskDeviceObject
->Flags
&= ~DO_VERIFY_VOLUME
;
535 DPRINT("SectorSize: %lu\n", DiskDeviceExtension
->DiskGeometry
->BytesPerSector
);
537 /* Read partition table */
538 Status
= IoReadPartitionTable(DiskDeviceObject
,
539 DiskDeviceExtension
->DiskGeometry
->BytesPerSector
,
543 DPRINT("IoReadPartitionTable(): Status: %lx\n", Status
);
545 if ((!NT_SUCCESS(Status
) || PartitionList
->PartitionCount
== 0) &&
546 DiskDeviceObject
->Characteristics
& FILE_REMOVABLE_MEDIA
)
548 if (!NT_SUCCESS(Status
))
550 /* Drive is not ready. */
551 DPRINT1("Drive not ready\n");
552 DiskData
->DriveNotReady
= TRUE
;
556 ExFreePool(PartitionList
);
559 /* Allocate a partition list for a single entry. */
560 PartitionList
= ExAllocatePool(NonPagedPool
,
561 sizeof(DRIVE_LAYOUT_INFORMATION
));
562 if (PartitionList
!= NULL
)
564 RtlZeroMemory(PartitionList
,
565 sizeof(DRIVE_LAYOUT_INFORMATION
));
566 PartitionList
->PartitionCount
= 1;
568 Status
= STATUS_SUCCESS
;
572 if (NT_SUCCESS(Status
))
574 DPRINT("Read partition table!\n");
576 DPRINT(" Number of partitions: %u\n", PartitionList
->PartitionCount
);
578 for (PartitionNumber
= 0; PartitionNumber
< PartitionList
->PartitionCount
; PartitionNumber
++)
580 PartitionEntry
= &PartitionList
->PartitionEntry
[PartitionNumber
];
582 DPRINT("Partition %02ld: nr: %d boot: %1x type: %x offset: %I64d size: %I64d\n",
584 PartitionEntry
->PartitionNumber
,
585 PartitionEntry
->BootIndicator
,
586 PartitionEntry
->PartitionType
,
587 PartitionEntry
->StartingOffset
.QuadPart
/ 512 /*DrvParms.BytesPerSector*/,
588 PartitionEntry
->PartitionLength
.QuadPart
/ 512 /* DrvParms.BytesPerSector*/);
590 /* Create partition device object */
592 "\\Device\\Harddisk%lu\\Partition%lu",
594 PartitionNumber
+ 1);
596 Status
= ScsiClassCreateDeviceObject(DriverObject
,
599 &PartitionDeviceObject
,
601 DPRINT("ScsiClassCreateDeviceObject(): Status %x\n", Status
);
602 if (NT_SUCCESS(Status
))
604 PartitionDeviceObject
->Flags
= DiskDeviceObject
->Flags
;
605 PartitionDeviceObject
->Characteristics
= DiskDeviceObject
->Characteristics
;
606 PartitionDeviceObject
->StackSize
= DiskDeviceObject
->StackSize
;
607 PartitionDeviceObject
->AlignmentRequirement
= DiskDeviceObject
->AlignmentRequirement
;
609 PartitionDeviceExtension
= PartitionDeviceObject
->DeviceExtension
;
610 PartitionDeviceExtension
->LockCount
= 0;
611 PartitionDeviceExtension
->DeviceNumber
= DiskNumber
;
612 PartitionDeviceExtension
->PortDeviceObject
= PortDeviceObject
;
613 PartitionDeviceExtension
->DiskGeometry
= DiskDeviceExtension
->DiskGeometry
;
614 PartitionDeviceExtension
->PhysicalDevice
= DiskDeviceExtension
->PhysicalDevice
;
616 /* FIXME: Not yet! Will cause pointer corruption! */
617 // PartitionDeviceExtension->PortCapabilities = PortCapabilities;
619 PartitionDeviceExtension
->StartingOffset
.QuadPart
=
620 PartitionEntry
->StartingOffset
.QuadPart
;
621 PartitionDeviceExtension
->PartitionLength
.QuadPart
=
622 PartitionEntry
->PartitionLength
.QuadPart
;
623 PartitionDeviceExtension
->PortNumber
= (UCHAR
)PortNumber
;
624 PartitionDeviceExtension
->PathId
= InquiryData
->PathId
;
625 PartitionDeviceExtension
->TargetId
= InquiryData
->TargetId
;
626 PartitionDeviceExtension
->Lun
= InquiryData
->Lun
;
627 PartitionDeviceExtension
->SectorShift
= DiskDeviceExtension
->SectorShift
;
629 DiskData
= (PDISK_DATA
)(PartitionDeviceExtension
+ 1);
630 DiskData
->PartitionType
= PartitionEntry
->PartitionType
;
631 DiskData
->PartitionNumber
= PartitionNumber
+ 1;
632 DiskData
->HiddenSectors
= PartitionEntry
->HiddenSectors
;
633 DiskData
->BootIndicator
= PartitionEntry
->BootIndicator
;
634 DiskData
->DriveNotReady
= FALSE
;
638 DPRINT1("ScsiClassCreateDeviceObject() failed to create partition device object (Status %x)\n", Status
);
647 if (PartitionList
!= NULL
)
648 ExFreePool(PartitionList
);
650 DPRINT("DiskClassCreateDeviceObjects() done\n");
652 return(STATUS_SUCCESS
);
659 // DiskClassDeviceControl
662 // Answer requests for device control calls
668 // Standard dispatch arguments
675 DiskClassDeviceControl(IN PDEVICE_OBJECT DeviceObject
,
678 PDEVICE_EXTENSION DeviceExtension
;
679 PIO_STACK_LOCATION IrpStack
;
680 ULONG ControlCode
, InputLength
, OutputLength
;
685 DPRINT("DiskClassDeviceControl() called!\n");
687 Status
= STATUS_INVALID_DEVICE_REQUEST
;
689 IrpStack
= IoGetCurrentIrpStackLocation(Irp
);
690 ControlCode
= IrpStack
->Parameters
.DeviceIoControl
.IoControlCode
;
691 InputLength
= IrpStack
->Parameters
.DeviceIoControl
.InputBufferLength
;
692 OutputLength
= IrpStack
->Parameters
.DeviceIoControl
.OutputBufferLength
;
693 DeviceExtension
= (PDEVICE_EXTENSION
)DeviceObject
->DeviceExtension
;
694 DiskData
= (PDISK_DATA
)(DeviceExtension
+ 1);
696 /* A huge switch statement in a Windows program?! who would have thought? */
699 case IOCTL_DISK_GET_DRIVE_GEOMETRY
:
700 DPRINT("IOCTL_DISK_GET_DRIVE_GEOMETRY\n");
701 if (IrpStack
->Parameters
.DeviceIoControl
.OutputBufferLength
< sizeof(DISK_GEOMETRY
))
703 Status
= STATUS_INVALID_PARAMETER
;
705 else if (DeviceExtension
->DiskGeometry
== NULL
)
707 DPRINT1("No disk geometry available!\n");
708 Status
= STATUS_NO_SUCH_DEVICE
;
712 PDISK_GEOMETRY Geometry
;
714 Geometry
= (PDISK_GEOMETRY
) Irp
->AssociatedIrp
.SystemBuffer
;
715 RtlMoveMemory(Geometry
,
716 DeviceExtension
->DiskGeometry
,
717 sizeof(DISK_GEOMETRY
));
719 Status
= STATUS_SUCCESS
;
720 Information
= sizeof(DISK_GEOMETRY
);
724 case IOCTL_DISK_GET_PARTITION_INFO
:
725 DPRINT("IOCTL_DISK_GET_PARTITION_INFO\n");
726 if (IrpStack
->Parameters
.DeviceIoControl
.OutputBufferLength
<
727 sizeof(PARTITION_INFORMATION
))
729 Status
= STATUS_INFO_LENGTH_MISMATCH
;
731 else if (DiskData
->PartitionNumber
== 0)
733 Status
= STATUS_INVALID_DEVICE_REQUEST
;
737 PPARTITION_INFORMATION PartitionInfo
;
739 PartitionInfo
= (PPARTITION_INFORMATION
)Irp
->AssociatedIrp
.SystemBuffer
;
741 PartitionInfo
->PartitionType
= DiskData
->PartitionType
;
742 PartitionInfo
->StartingOffset
= DeviceExtension
->StartingOffset
;
743 PartitionInfo
->PartitionLength
= DeviceExtension
->PartitionLength
;
744 PartitionInfo
->HiddenSectors
= DiskData
->HiddenSectors
;
745 PartitionInfo
->PartitionNumber
= DiskData
->PartitionNumber
;
746 PartitionInfo
->BootIndicator
= DiskData
->BootIndicator
;
747 PartitionInfo
->RewritePartition
= FALSE
;
748 PartitionInfo
->RecognizedPartition
=
749 IsRecognizedPartition(DiskData
->PartitionType
);
751 Status
= STATUS_SUCCESS
;
752 Information
= sizeof(PARTITION_INFORMATION
);
756 case IOCTL_DISK_SET_PARTITION_INFO
:
757 DPRINT1("Unhandled IOCTL_DISK_SET_PARTITION_INFO\n");
758 Status
= STATUS_INVALID_DEVICE_REQUEST
;
762 case IOCTL_DISK_GET_DRIVE_LAYOUT
:
763 if (IrpStack
->Parameters
.DeviceIoControl
.OutputBufferLength
<
764 sizeof(DRIVE_LAYOUT_INFORMATION
))
766 Status
= STATUS_BUFFER_TOO_SMALL
;
770 PDRIVE_LAYOUT_INFORMATION PartitionList
;
772 Status
= IoReadPartitionTable(DeviceExtension
->PhysicalDevice
,
773 DeviceExtension
->DiskGeometry
->BytesPerSector
,
776 if (NT_SUCCESS(Status
))
780 BufferSize
= FIELD_OFFSET(DRIVE_LAYOUT_INFORMATION
,
782 BufferSize
+= PartitionList
->PartitionCount
* sizeof(PARTITION_INFORMATION
);
784 if (BufferSize
> IrpStack
->Parameters
.DeviceIoControl
.OutputBufferLength
)
786 Status
= STATUS_BUFFER_TOO_SMALL
;
790 RtlMoveMemory(Irp
->AssociatedIrp
.SystemBuffer
,
793 Status
= STATUS_SUCCESS
;
794 Information
= BufferSize
;
796 ExFreePool(PartitionList
);
801 case IOCTL_DISK_SET_DRIVE_LAYOUT
:
802 case IOCTL_DISK_VERIFY
:
803 case IOCTL_DISK_FORMAT_TRACKS
:
804 case IOCTL_DISK_PERFORMANCE
:
805 case IOCTL_DISK_IS_WRITABLE
:
806 case IOCTL_DISK_LOGGING
:
807 case IOCTL_DISK_FORMAT_TRACKS_EX
:
808 case IOCTL_DISK_HISTOGRAM_STRUCTURE
:
809 case IOCTL_DISK_HISTOGRAM_DATA
:
810 case IOCTL_DISK_HISTOGRAM_RESET
:
811 case IOCTL_DISK_REQUEST_STRUCTURE
:
812 case IOCTL_DISK_REQUEST_DATA
:
814 /* If we get here, something went wrong. inform the requestor */
816 DPRINT1("Unhandled control code: %lx\n", ControlCode
);
817 Status
= STATUS_INVALID_DEVICE_REQUEST
;
822 Irp
->IoStatus
.Status
= Status
;
823 Irp
->IoStatus
.Information
= Information
;
824 IoCompleteRequest(Irp
,
831 /**********************************************************************
833 * DiskClassShutdownFlush
836 * Answer requests for shutdown and flush calls.
843 * Pointer to the device.
853 DiskClassShutdownFlush(IN PDEVICE_OBJECT DeviceObject
,
856 DPRINT("DiskClassShutdownFlush() called!\n");
858 Irp
->IoStatus
.Status
= STATUS_SUCCESS
;
859 Irp
->IoStatus
.Information
= 0;
860 IoCompleteRequest(Irp
, IO_NO_INCREMENT
);
862 return(STATUS_SUCCESS
);