From: Nate Bushman [NBushman@Legato.com]
Sent: Thursday, March 08, 2001 8:09 PM
To: NT Developers Interest List
Subject: [ntdev] DeviceExtension not getting allocated by
IoCreateDevice()...

When I use IoCreateDevice() to create a device object (for filtering
volumes), for some strange reason it's not allocating my device extension.
Here's how I'm doing it:

	status = IoCreateDevice(pDriverObject,
	                        sizeof(LOWIRQL_FILTER_EXTENION),
	                        NULL,
	                        FILE_DEVICE_DISK,
	                        0,
	                        FALSE,
	                        &pFilterDeviceObject);

LOWIRQL_FILTER_EXTENION is defined as:


typedef struct _LOWIRQL_FILTER_EXTENION {
	PDEVICE_OBJECT pThisDeviceObject;
	PDEVICE_OBJECT pLowerDeviceObject;
	ULONG          DiskNumber;
	ULONG          DiskSignature;
	ULONG          PartitionNumber;
	LONGLONG       PartitionOffset;
	LONGLONG       PartitionLength;
	BOOLEAN        bDeletePending;
} LOWIRQL_FILTER_EXTENION, *PLOWIRQL_FILTER_EXTENION;


I'm writing a driver for NT4, but I'm testing it on my W2K machines, and
DriverExtension never gets allocated.


needs NT type driver name attached in create device since this is tested
in w2k.

---
You are currently subscribed to ntdev as: GlennEverhart@FirstUSA.com
To unsubscribe send a blank email to leave-ntdev-247T@lists.osr.com