EVT_WDF_IO_QUEUE_IO_DEFAULT - NtDoc
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// wdfio.h
EVT_WDF_IO_QUEUE_IO_DEFAULT EvtWdfIoQueueIoDefault;
VOID EvtWdfIoQueueIoDefault(
[in] WDFQUEUE Queue,
[in] WDFREQUEST Request
)
{...}
View the official Windows Driver Kit DDI referenceNo description available.
[Applies to KMDF and UMDF]
A driver's EvtIoDefault event callback function processes a specified I/O request.
Queue [in]A handle to the framework queue object that is associated with the I/O request.
Request [in]A handle to a framework request object.
A driver registers an EvtIoDefault callback function when it calls WdfIoQueueCreate. For more information about calling WdfIoQueueCreate, see Creating I/O Queues.
If a driver has registered an EvtIoDefault callback function for a device's I/O queue, the callback function receives every I/O request from the queue, unless request-specific callback functions have also been registered. For more information about request-specific callback functions, see Request Handlers.
A driver's EvtIoDefault callback function can also receive file creation requests. For more information about receiving file creation requests, see Framework File Objects.
The EvtIoDefault callback function must process each received I/O request in some manner. For more information, see Processing I/O Requests.
Most I/O operations require an input buffer, an output buffer, or both. For information about how the driver can access a request's buffers, see Accessing Data Buffers in Framework-Based Drivers.
This callback function can be called at IRQL <= DISPATCH_LEVEL, unless the ExecutionLevel member of the device or driver's WDF_OBJECT_ATTRIBUTES structure is set to WdfExecutionLevelPassive.
If the IRQL is PASSIVE_LEVEL, the framework calls the callback function within a critical region.
For more information about IRQL levels for request handlers, see Using Automatic Synchronization.
A driver's EvtIoDefault callback function should not call the following queue object methods: