DeviceIoControl to a filter,the APP how to CreateFile?

NTFSD
1

the filter driver create a CDO,named “pkfilter”,
in the Application,I want to use CreateFile to get a handle to the filter
CDO,then use DeviceIoControl.But what first parameter in the CreateFile?

2

use “\\.\pkfilter”

Manish

cnmmd wrote:
the filter driver create a CDO,named “pkfilter”,
in the Application,I want to use CreateFile to get a handle to the filter
CDO,then use DeviceIoControl.But what first parameter in the CreateFile?

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3

Use the device interface reference strings.

Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
xxxxx@storagecraft.com
http://www.storagecraft.com

----- Original Message -----
From: “cnmmd”
Newsgroups: ntfsd
To: “Windows File Systems Devs Interest List”
Sent: Monday, July 12, 2004 5:52 AM
Subject: [ntfsd] DeviceIoControl to a filter,the APP how to CreateFile?

> the filter driver create a CDO,named “pkfilter”,
> in the Application,I want to use CreateFile to get a handle to the filter
> CDO,then use DeviceIoControl.But what first parameter in the CreateFile?
>
>
>
> —
> Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com

4

The following is my filter driver code for Create the Control Device Object
(CDO)
Then how to use CreateFile?

//
// Create the Control Device Object (CDO). This object represents
this
// driver. Note that it does not have a device extension.
//

RtlInitUnicodeString( &nameString,
L"\FileSystem\Filters\PkFilter" );

status = IoCreateDevice( DriverObject, 0, //has no device extension
&nameString, FILE_DEVICE_DISK_FILE_SYSTEM,
FILE_DEVICE_SECURE_OPEN, FALSE, &gPadLockFilter_ControlDeviceObject );

if ( status == STATUS_OBJECT_PATH_NOT_FOUND )
{

//
// This must be a version of the OS that doesn’t have the
Filters
// path in its namespace. This was added in Windows XP.
//
// We will try just putting our control device object in
the \FileSystem
// portion of the object name space.
//

RtlInitUnicodeString( &nameString,
L"\FileSystem\PkFilterCDO" );

status = IoCreateDevice( DriverObject, 0, //has no device
extension
&nameString, FILE_DEVICE_DISK_FILE_SYSTEM,
FILE_DEVICE_SECURE_OPEN, FALSE, &gPadLockFilter_ControlDeviceObject );

if ( !NT_SUCCESS( status ) )
{

KdPrint( ( “PkFilter!DriverEntry: Error creating
control device object "%wZ", status=%08x\n”, &nameString, status ) );
return status;
}

}
else if ( !NT_SUCCESS( status ) )
{

KdPrint( ( “PkFilter!DriverEntry: Error creating control
device object "%wZ", status=%08x\n”, &nameString, status ) );
return status;
}

Use the device interface reference strings.

Maxim Shatskih, Windows DDK MVP
StorageCraft Corporation
xxxxx@storagecraft.com
http://www.storagecraft.com

----- Original Message -----
From: “cnmmd”
Newsgroups: ntfsd
To: “Windows File Systems Devs Interest List”
Sent: Monday, July 12, 2004 5:52 AM
Subject: [ntfsd] DeviceIoControl to a filter,the APP how to CreateFile?

> the filter driver create a CDO,named “pkfilter”,
> in the Application,I want to use CreateFile to get a handle to the filter
> CDO,then use DeviceIoControl.But what first parameter in the CreateFile?
>
>
>
> —
> Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17
>
> You are currently subscribed to ntfsd as: xxxxx@storagecraft.com
> To unsubscribe send a blank email to xxxxx@lists.osr.com

—
Questions? First check the IFS FAQ at
https://www.osronline.com/article.cfm?id=17

You are currently subscribed to ntfsd as: xxxxx@viatech.com.cn
To unsubscribe send a blank email to xxxxx@lists.osr.com