From fc37cc4a02ed13d1a73b941a9f80975600fd1b99 Mon Sep 17 00:00:00 2001 From: David Foerster Date: Tue, 10 May 2016 20:20:14 +0200 Subject: Normalize all line terminators --- src/Driver/VolumeFilter.c | 598 +++++++++++++++++++++++----------------------- 1 file changed, 299 insertions(+), 299 deletions(-) (limited to 'src/Driver/VolumeFilter.c') diff --git a/src/Driver/VolumeFilter.c b/src/Driver/VolumeFilter.c index 78b2d7b9..8cb675f6 100644 --- a/src/Driver/VolumeFilter.c +++ b/src/Driver/VolumeFilter.c @@ -1,299 +1,299 @@ -/* - Derived from source code of TrueCrypt 7.1a, which is - Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed - by the TrueCrypt License 3.0. - - Modifications and additions to the original source code (contained in this file) - and all other portions of this file are Copyright (c) 2013-2016 IDRIX - and are governed by the Apache License 2.0 the full text of which is - contained in the file License.txt included in VeraCrypt binary and source - code distribution packages. -*/ - -#include "TCdefs.h" -#include "Ntdriver.h" -#include "Ntvol.h" -#include "DriveFilter.h" -#include "VolumeFilter.h" - -typedef DriveFilterExtension VolumeFilterExtension; - -// Number of times the filter driver answered that an unencrypted volume -// is read-only (or mounted an outer/normal TrueCrypt volume as read only) -uint32 HiddenSysLeakProtectionCount = 0; - - -NTSTATUS VolumeFilterAddDevice (PDRIVER_OBJECT driverObject, PDEVICE_OBJECT pdo) -{ - VolumeFilterExtension *Extension; - NTSTATUS status; - PDEVICE_OBJECT filterDeviceObject = NULL; - PDEVICE_OBJECT attachedDeviceObject; - - Dump ("VolumeFilterAddDevice pdo=%p\n", pdo); - - attachedDeviceObject = IoGetAttachedDeviceReference (pdo); - status = IoCreateDevice (driverObject, sizeof (VolumeFilterExtension), NULL, attachedDeviceObject->DeviceType, 0, FALSE, &filterDeviceObject); - - ObDereferenceObject (attachedDeviceObject); - - if (!NT_SUCCESS (status)) - { - filterDeviceObject = NULL; - goto err; - } - - Extension = (VolumeFilterExtension *) filterDeviceObject->DeviceExtension; - memset (Extension, 0, sizeof (VolumeFilterExtension)); - - status = IoAttachDeviceToDeviceStackSafe (filterDeviceObject, pdo, &(Extension->LowerDeviceObject)); - if (status != STATUS_SUCCESS) - { - goto err; - } - - if (!Extension->LowerDeviceObject) - { - status = STATUS_DEVICE_REMOVED; - goto err; - } - - Extension->IsVolumeFilterDevice = TRUE; - Extension->DeviceObject = filterDeviceObject; - Extension->Pdo = pdo; - - IoInitializeRemoveLock (&Extension->Queue.RemoveLock, 'LRCV', 0, 0); - - filterDeviceObject->Flags |= Extension->LowerDeviceObject->Flags & (DO_DIRECT_IO | DO_BUFFERED_IO | DO_POWER_PAGABLE); - filterDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING; - - return status; - -err: - if (filterDeviceObject) - { - if (Extension->LowerDeviceObject) - IoDetachDevice (Extension->LowerDeviceObject); - - IoDeleteDevice (filterDeviceObject); - } - - return status; -} - - -static NTSTATUS PassIrp (PDEVICE_OBJECT deviceObject, PIRP irp) -{ - IoSkipCurrentIrpStackLocation (irp); - return IoCallDriver (deviceObject, irp); -} - - -static NTSTATUS PassFilteredIrp (PDEVICE_OBJECT deviceObject, PIRP irp, PIO_COMPLETION_ROUTINE completionRoutine, PVOID completionRoutineArg) -{ - IoCopyCurrentIrpStackLocationToNext (irp); - - if (completionRoutine) - IoSetCompletionRoutine (irp, completionRoutine, completionRoutineArg, TRUE, TRUE, TRUE); - - return IoCallDriver (deviceObject, irp); -} - - -static NTSTATUS OnDeviceUsageNotificationCompleted (PDEVICE_OBJECT filterDeviceObject, PIRP Irp, VolumeFilterExtension *Extension) -{ - if (Irp->PendingReturned) - IoMarkIrpPending (Irp); - - if (!(Extension->LowerDeviceObject->Flags & DO_POWER_PAGABLE)) - filterDeviceObject->Flags &= ~DO_POWER_PAGABLE; - - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - return STATUS_CONTINUE_COMPLETION; -} - - -static NTSTATUS OnStartDeviceCompleted (PDEVICE_OBJECT filterDeviceObject, PIRP Irp, VolumeFilterExtension *Extension) -{ - if (Irp->PendingReturned) - IoMarkIrpPending (Irp); - - if (Extension->LowerDeviceObject->Characteristics & FILE_REMOVABLE_MEDIA) - filterDeviceObject->Characteristics |= FILE_REMOVABLE_MEDIA; - - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - return STATUS_CONTINUE_COMPLETION; -} - - -static NTSTATUS DispatchControl (PDEVICE_OBJECT DeviceObject, PIRP Irp, VolumeFilterExtension *Extension, PIO_STACK_LOCATION irpSp) -{ - NTSTATUS status = IoAcquireRemoveLock (&Extension->Queue.RemoveLock, Irp); - if (!NT_SUCCESS (status)) - return TCCompleteIrp (Irp, status, 0); - - if (IsHiddenSystemRunning()) - { - switch (irpSp->Parameters.DeviceIoControl.IoControlCode) - { - case IOCTL_DISK_IS_WRITABLE: - { - // All volumes except the system volume must be read-only - - DriveFilterExtension *bootDriveExtension = GetBootDriveFilterExtension(); - STORAGE_DEVICE_NUMBER storageDeviceNumber; - - if (!bootDriveExtension->SystemStorageDeviceNumberValid) - TC_BUG_CHECK (STATUS_INVALID_PARAMETER); - - status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &storageDeviceNumber, sizeof (storageDeviceNumber)); - - if (NT_SUCCESS (status) && bootDriveExtension->SystemStorageDeviceNumber == storageDeviceNumber.DeviceNumber) - { - PARTITION_INFORMATION_EX partition; - status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, IOCTL_DISK_GET_PARTITION_INFO_EX, NULL, 0, &partition, sizeof (partition)); - - if (NT_SUCCESS (status) && partition.StartingOffset.QuadPart == bootDriveExtension->ConfiguredEncryptedAreaStart) - { - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - return TCCompleteDiskIrp (Irp, STATUS_SUCCESS, 0); - } - } - - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - - ++HiddenSysLeakProtectionCount; - return TCCompleteDiskIrp (Irp, STATUS_MEDIA_WRITE_PROTECTED, 0); - } - - case TC_IOCTL_DISK_IS_WRITABLE: - Dump ("TC_IOCTL_DISK_IS_WRITABLE pdo=%p\n", Extension->Pdo); - - if (!ProbingHostDeviceForWrite) - break; - - // Probe the real state of the device as the user is mounting a TrueCrypt volume. - - // Volume filter may be attached to a merged drive+volume PDO. First test if TC_IOCTL_DISK_IS_WRITABLE works for the underlying device. - status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, TC_IOCTL_DISK_IS_WRITABLE, NULL, 0, NULL, 0); - - if (NT_SUCCESS (status) || status == STATUS_MEDIA_WRITE_PROTECTED) - { - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - return TCCompleteDiskIrp (Irp, status, 0); - } - - status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, IOCTL_DISK_IS_WRITABLE, NULL, 0, NULL, 0); - - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - return TCCompleteDiskIrp (Irp, status, 0); - - case IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES: - - // Filter IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES to enable potential future use of hidden systems on drives that use the trim operation but not wear-leveling (if any appear in future). The documentation forbids users to create hidden volumes/systems on drives that use wear-leveling and consequently also on drives that use trim (as trim is used only by drives that use wear-leveling, as of 2010). - - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - return TCCompleteDiskIrp (Irp, STATUS_SUCCESS, 0); - } - } - - status = PassIrp (Extension->LowerDeviceObject, Irp); - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - return status; -} - - -static NTSTATUS DispatchPnp (PDEVICE_OBJECT DeviceObject, PIRP Irp, VolumeFilterExtension *Extension, PIO_STACK_LOCATION irpSp) -{ - NTSTATUS status; - - status = IoAcquireRemoveLock (&Extension->Queue.RemoveLock, Irp); - if (!NT_SUCCESS (status)) - return TCCompleteIrp (Irp, status, 0); - - switch (irpSp->MinorFunction) - { - case IRP_MN_START_DEVICE: - Dump ("IRP_MN_START_DEVICE volume pdo=%p\n", Extension->Pdo); - return PassFilteredIrp (Extension->LowerDeviceObject, Irp, OnStartDeviceCompleted, Extension); - - case IRP_MN_DEVICE_USAGE_NOTIFICATION: - { - PDEVICE_OBJECT attachedDevice = IoGetAttachedDeviceReference (DeviceObject); - - if (attachedDevice == DeviceObject || (attachedDevice->Flags & DO_POWER_PAGABLE)) - DeviceObject->Flags |= DO_POWER_PAGABLE; - - ObDereferenceObject (attachedDevice); - } - - return PassFilteredIrp (Extension->LowerDeviceObject, Irp, OnDeviceUsageNotificationCompleted, Extension); - - - case IRP_MN_REMOVE_DEVICE: - Dump ("IRP_MN_REMOVE_DEVICE volume pdo=%p\n", Extension->Pdo); - - IoReleaseRemoveLockAndWait (&Extension->Queue.RemoveLock, Irp); - status = PassIrp (Extension->LowerDeviceObject, Irp); - - IoDetachDevice (Extension->LowerDeviceObject); - - IoDeleteDevice (DeviceObject); - return status; - - default: - status = PassIrp (Extension->LowerDeviceObject, Irp); - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - } - - return status; -} - - -static NTSTATUS DispatchPower (PDEVICE_OBJECT DeviceObject, PIRP Irp, VolumeFilterExtension *Extension, PIO_STACK_LOCATION irpSp) -{ - NTSTATUS status; - PoStartNextPowerIrp (Irp); - - status = IoAcquireRemoveLock (&Extension->Queue.RemoveLock, Irp); - if (!NT_SUCCESS (status)) - return TCCompleteIrp (Irp, status, 0); - - IoSkipCurrentIrpStackLocation (Irp); - status = PoCallDriver (Extension->LowerDeviceObject, Irp); - - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - return status; -} - - -NTSTATUS VolumeFilterDispatchIrp (PDEVICE_OBJECT DeviceObject, PIRP Irp) -{ - VolumeFilterExtension *Extension = (VolumeFilterExtension *) DeviceObject->DeviceExtension; - PIO_STACK_LOCATION irpSp = IoGetCurrentIrpStackLocation (Irp); - NTSTATUS status; - - ASSERT (!Extension->bRootDevice && Extension->IsVolumeFilterDevice); - - switch (irpSp->MajorFunction) - { - case IRP_MJ_DEVICE_CONTROL: - return DispatchControl (DeviceObject, Irp, Extension, irpSp); - - case IRP_MJ_PNP: - return DispatchPnp (DeviceObject, Irp, Extension, irpSp); - - case IRP_MJ_POWER: - return DispatchPower (DeviceObject, Irp, Extension, irpSp); - - default: - status = IoAcquireRemoveLock (&Extension->Queue.RemoveLock, Irp); - if (!NT_SUCCESS (status)) - return TCCompleteIrp (Irp, status, 0); - - status = PassIrp (Extension->LowerDeviceObject, Irp); - - IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); - return status; - } -} +/* + Derived from source code of TrueCrypt 7.1a, which is + Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed + by the TrueCrypt License 3.0. + + Modifications and additions to the original source code (contained in this file) + and all other portions of this file are Copyright (c) 2013-2016 IDRIX + and are governed by the Apache License 2.0 the full text of which is + contained in the file License.txt included in VeraCrypt binary and source + code distribution packages. +*/ + +#include "TCdefs.h" +#include "Ntdriver.h" +#include "Ntvol.h" +#include "DriveFilter.h" +#include "VolumeFilter.h" + +typedef DriveFilterExtension VolumeFilterExtension; + +// Number of times the filter driver answered that an unencrypted volume +// is read-only (or mounted an outer/normal TrueCrypt volume as read only) +uint32 HiddenSysLeakProtectionCount = 0; + + +NTSTATUS VolumeFilterAddDevice (PDRIVER_OBJECT driverObject, PDEVICE_OBJECT pdo) +{ + VolumeFilterExtension *Extension; + NTSTATUS status; + PDEVICE_OBJECT filterDeviceObject = NULL; + PDEVICE_OBJECT attachedDeviceObject; + + Dump ("VolumeFilterAddDevice pdo=%p\n", pdo); + + attachedDeviceObject = IoGetAttachedDeviceReference (pdo); + status = IoCreateDevice (driverObject, sizeof (VolumeFilterExtension), NULL, attachedDeviceObject->DeviceType, 0, FALSE, &filterDeviceObject); + + ObDereferenceObject (attachedDeviceObject); + + if (!NT_SUCCESS (status)) + { + filterDeviceObject = NULL; + goto err; + } + + Extension = (VolumeFilterExtension *) filterDeviceObject->DeviceExtension; + memset (Extension, 0, sizeof (VolumeFilterExtension)); + + status = IoAttachDeviceToDeviceStackSafe (filterDeviceObject, pdo, &(Extension->LowerDeviceObject)); + if (status != STATUS_SUCCESS) + { + goto err; + } + + if (!Extension->LowerDeviceObject) + { + status = STATUS_DEVICE_REMOVED; + goto err; + } + + Extension->IsVolumeFilterDevice = TRUE; + Extension->DeviceObject = filterDeviceObject; + Extension->Pdo = pdo; + + IoInitializeRemoveLock (&Extension->Queue.RemoveLock, 'LRCV', 0, 0); + + filterDeviceObject->Flags |= Extension->LowerDeviceObject->Flags & (DO_DIRECT_IO | DO_BUFFERED_IO | DO_POWER_PAGABLE); + filterDeviceObject->Flags &= ~DO_DEVICE_INITIALIZING; + + return status; + +err: + if (filterDeviceObject) + { + if (Extension->LowerDeviceObject) + IoDetachDevice (Extension->LowerDeviceObject); + + IoDeleteDevice (filterDeviceObject); + } + + return status; +} + + +static NTSTATUS PassIrp (PDEVICE_OBJECT deviceObject, PIRP irp) +{ + IoSkipCurrentIrpStackLocation (irp); + return IoCallDriver (deviceObject, irp); +} + + +static NTSTATUS PassFilteredIrp (PDEVICE_OBJECT deviceObject, PIRP irp, PIO_COMPLETION_ROUTINE completionRoutine, PVOID completionRoutineArg) +{ + IoCopyCurrentIrpStackLocationToNext (irp); + + if (completionRoutine) + IoSetCompletionRoutine (irp, completionRoutine, completionRoutineArg, TRUE, TRUE, TRUE); + + return IoCallDriver (deviceObject, irp); +} + + +static NTSTATUS OnDeviceUsageNotificationCompleted (PDEVICE_OBJECT filterDeviceObject, PIRP Irp, VolumeFilterExtension *Extension) +{ + if (Irp->PendingReturned) + IoMarkIrpPending (Irp); + + if (!(Extension->LowerDeviceObject->Flags & DO_POWER_PAGABLE)) + filterDeviceObject->Flags &= ~DO_POWER_PAGABLE; + + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return STATUS_CONTINUE_COMPLETION; +} + + +static NTSTATUS OnStartDeviceCompleted (PDEVICE_OBJECT filterDeviceObject, PIRP Irp, VolumeFilterExtension *Extension) +{ + if (Irp->PendingReturned) + IoMarkIrpPending (Irp); + + if (Extension->LowerDeviceObject->Characteristics & FILE_REMOVABLE_MEDIA) + filterDeviceObject->Characteristics |= FILE_REMOVABLE_MEDIA; + + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return STATUS_CONTINUE_COMPLETION; +} + + +static NTSTATUS DispatchControl (PDEVICE_OBJECT DeviceObject, PIRP Irp, VolumeFilterExtension *Extension, PIO_STACK_LOCATION irpSp) +{ + NTSTATUS status = IoAcquireRemoveLock (&Extension->Queue.RemoveLock, Irp); + if (!NT_SUCCESS (status)) + return TCCompleteIrp (Irp, status, 0); + + if (IsHiddenSystemRunning()) + { + switch (irpSp->Parameters.DeviceIoControl.IoControlCode) + { + case IOCTL_DISK_IS_WRITABLE: + { + // All volumes except the system volume must be read-only + + DriveFilterExtension *bootDriveExtension = GetBootDriveFilterExtension(); + STORAGE_DEVICE_NUMBER storageDeviceNumber; + + if (!bootDriveExtension->SystemStorageDeviceNumberValid) + TC_BUG_CHECK (STATUS_INVALID_PARAMETER); + + status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, IOCTL_STORAGE_GET_DEVICE_NUMBER, NULL, 0, &storageDeviceNumber, sizeof (storageDeviceNumber)); + + if (NT_SUCCESS (status) && bootDriveExtension->SystemStorageDeviceNumber == storageDeviceNumber.DeviceNumber) + { + PARTITION_INFORMATION_EX partition; + status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, IOCTL_DISK_GET_PARTITION_INFO_EX, NULL, 0, &partition, sizeof (partition)); + + if (NT_SUCCESS (status) && partition.StartingOffset.QuadPart == bootDriveExtension->ConfiguredEncryptedAreaStart) + { + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return TCCompleteDiskIrp (Irp, STATUS_SUCCESS, 0); + } + } + + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + + ++HiddenSysLeakProtectionCount; + return TCCompleteDiskIrp (Irp, STATUS_MEDIA_WRITE_PROTECTED, 0); + } + + case TC_IOCTL_DISK_IS_WRITABLE: + Dump ("TC_IOCTL_DISK_IS_WRITABLE pdo=%p\n", Extension->Pdo); + + if (!ProbingHostDeviceForWrite) + break; + + // Probe the real state of the device as the user is mounting a TrueCrypt volume. + + // Volume filter may be attached to a merged drive+volume PDO. First test if TC_IOCTL_DISK_IS_WRITABLE works for the underlying device. + status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, TC_IOCTL_DISK_IS_WRITABLE, NULL, 0, NULL, 0); + + if (NT_SUCCESS (status) || status == STATUS_MEDIA_WRITE_PROTECTED) + { + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return TCCompleteDiskIrp (Irp, status, 0); + } + + status = SendDeviceIoControlRequest (Extension->LowerDeviceObject, IOCTL_DISK_IS_WRITABLE, NULL, 0, NULL, 0); + + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return TCCompleteDiskIrp (Irp, status, 0); + + case IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES: + + // Filter IOCTL_STORAGE_MANAGE_DATA_SET_ATTRIBUTES to enable potential future use of hidden systems on drives that use the trim operation but not wear-leveling (if any appear in future). The documentation forbids users to create hidden volumes/systems on drives that use wear-leveling and consequently also on drives that use trim (as trim is used only by drives that use wear-leveling, as of 2010). + + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return TCCompleteDiskIrp (Irp, STATUS_SUCCESS, 0); + } + } + + status = PassIrp (Extension->LowerDeviceObject, Irp); + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return status; +} + + +static NTSTATUS DispatchPnp (PDEVICE_OBJECT DeviceObject, PIRP Irp, VolumeFilterExtension *Extension, PIO_STACK_LOCATION irpSp) +{ + NTSTATUS status; + + status = IoAcquireRemoveLock (&Extension->Queue.RemoveLock, Irp); + if (!NT_SUCCESS (status)) + return TCCompleteIrp (Irp, status, 0); + + switch (irpSp->MinorFunction) + { + case IRP_MN_START_DEVICE: + Dump ("IRP_MN_START_DEVICE volume pdo=%p\n", Extension->Pdo); + return PassFilteredIrp (Extension->LowerDeviceObject, Irp, OnStartDeviceCompleted, Extension); + + case IRP_MN_DEVICE_USAGE_NOTIFICATION: + { + PDEVICE_OBJECT attachedDevice = IoGetAttachedDeviceReference (DeviceObject); + + if (attachedDevice == DeviceObject || (attachedDevice->Flags & DO_POWER_PAGABLE)) + DeviceObject->Flags |= DO_POWER_PAGABLE; + + ObDereferenceObject (attachedDevice); + } + + return PassFilteredIrp (Extension->LowerDeviceObject, Irp, OnDeviceUsageNotificationCompleted, Extension); + + + case IRP_MN_REMOVE_DEVICE: + Dump ("IRP_MN_REMOVE_DEVICE volume pdo=%p\n", Extension->Pdo); + + IoReleaseRemoveLockAndWait (&Extension->Queue.RemoveLock, Irp); + status = PassIrp (Extension->LowerDeviceObject, Irp); + + IoDetachDevice (Extension->LowerDeviceObject); + + IoDeleteDevice (DeviceObject); + return status; + + default: + status = PassIrp (Extension->LowerDeviceObject, Irp); + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + } + + return status; +} + + +static NTSTATUS DispatchPower (PDEVICE_OBJECT DeviceObject, PIRP Irp, VolumeFilterExtension *Extension, PIO_STACK_LOCATION irpSp) +{ + NTSTATUS status; + PoStartNextPowerIrp (Irp); + + status = IoAcquireRemoveLock (&Extension->Queue.RemoveLock, Irp); + if (!NT_SUCCESS (status)) + return TCCompleteIrp (Irp, status, 0); + + IoSkipCurrentIrpStackLocation (Irp); + status = PoCallDriver (Extension->LowerDeviceObject, Irp); + + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return status; +} + + +NTSTATUS VolumeFilterDispatchIrp (PDEVICE_OBJECT DeviceObject, PIRP Irp) +{ + VolumeFilterExtension *Extension = (VolumeFilterExtension *) DeviceObject->DeviceExtension; + PIO_STACK_LOCATION irpSp = IoGetCurrentIrpStackLocation (Irp); + NTSTATUS status; + + ASSERT (!Extension->bRootDevice && Extension->IsVolumeFilterDevice); + + switch (irpSp->MajorFunction) + { + case IRP_MJ_DEVICE_CONTROL: + return DispatchControl (DeviceObject, Irp, Extension, irpSp); + + case IRP_MJ_PNP: + return DispatchPnp (DeviceObject, Irp, Extension, irpSp); + + case IRP_MJ_POWER: + return DispatchPower (DeviceObject, Irp, Extension, irpSp); + + default: + status = IoAcquireRemoveLock (&Extension->Queue.RemoveLock, Irp); + if (!NT_SUCCESS (status)) + return TCCompleteIrp (Irp, status, 0); + + status = PassIrp (Extension->LowerDeviceObject, Irp); + + IoReleaseRemoveLock (&Extension->Queue.RemoveLock, Irp); + return status; + } +} -- cgit v1.2.3