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-Impl. IoGetRelatedDeviceObject

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-Impl. IoAttachDevice

svn path=/trunk/; revision=4839
This commit is contained in:
Gunnar Dalsnes 2003-06-04 21:35:37 +00:00
parent ffe18386b5
commit 08b9eddcc0
1 changed files with 36 additions and 4 deletions
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40
reactos/ntoskrnl/io/device.c
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@ -1,4 +1,4 @@
/* $Id: device.c,v 1.52 2003/05/13 21:28:26 chorns Exp $
/* $Id: device.c,v 1.53 2003/06/04 21:35:37 gdalsnes Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -96,7 +96,21 @@ IoGetRelatedDeviceObject (
IN PFILE_OBJECT FileObject
)
{
return (FileObject->DeviceObject);
/*Win NT File System Internals, page 633-634*/
/*get logical volume mounted on a physical/virtual/logical device*/
if (FileObject->Vpb && FileObject->Vpb->DeviceObject)
{
return IoGetAttachedDevice(FileObject->Vpb->DeviceObject);
}
/*check if fileobject has an associated device object mounted by some other file system*/
if (FileObject->DeviceObject->Vpb && FileObject->DeviceObject->Vpb->DeviceObject)
{
return IoGetAttachedDevice(FileObject->DeviceObject->Vpb->DeviceObject);
}
return IoGetAttachedDevice(FileObject->DeviceObject);
}
@ -548,7 +562,7 @@ IopInitializeDriver(PDRIVER_INITIALIZE DriverEntry,
NTSTATUS STDCALL
IoAttachDevice(PDEVICE_OBJECT SourceDevice,
PUNICODE_STRING TargetDevice,
PUNICODE_STRING TargetDeviceName,
PDEVICE_OBJECT* AttachedDevice)
/*
* FUNCTION: Layers a device over the highest device in a device stack
@ -558,7 +572,25 @@ IoAttachDevice(PDEVICE_OBJECT SourceDevice,
* AttachedDevice (OUT) = Caller storage for the device attached to
*/
{
UNIMPLEMENTED;
NTSTATUS Status;
PFILE_OBJECT FileObject;
PDEVICE_OBJECT TargetDevice;
Status = IoGetDeviceObjectPointer(TargetDeviceName,
FILE_READ_ATTRIBUTES,
&FileObject,
&TargetDevice);
if (!NT_SUCCESS(Status))
{
return Status;
}
*AttachedDevice = IoAttachDeviceToDeviceStack(SourceDevice,
TargetDevice);
ObDereferenceObject(FileObject);
return STATUS_SUCCESS;
}