IRP_MJ_CREATE

Every kernel-mode driver must handle create requests in a DispatchCreate or DispatchCreateClose routine.

When Sent

Receipt of this request indicates that a user-mode protected subsystem, possibly on behalf of an application, has requested a handle for the file object that represents the target device object, or that a higher-level driver is connecting or attaching its device object to the target device object.

Input Parameters

None

Output Parameters

None

Operation

Many device and intermediate drivers merely set STATUS_SUCCESS in the I/O status block of the IRP and complete the create request. However, what a given driver does on receipt of a create request depends on the driver’s design. For example, a driver with pageable-image sections, like the system serial driver, maps in its paged-out code and allocates any resources necessary to handle subsequent I/O requests for the user-mode thread that is attempting to open the device for I/O.