FltGetIoPriorityHintFromCallbackData function (fltkernel.h)
The FltGetIoPriorityHintFromCallbackData routine is used by a minifilter driver to get IO priority information from callback data.
Syntax
IO_PRIORITY_HINT FLTAPI FltGetIoPriorityHintFromCallbackData(
[in] PFLT_CALLBACK_DATA Data
);
Parameters
[in] Data
A pointer to a FLT_CALLBACK_DATA structure that represents an I/O operation. This parameter is required and cannot be NULL.
Return value
The FltGetIoPriorityHintFromCallbackData routine returns an IO priority hint retrieved from the DataFLT_CALLBACK_DATA structure.
If the FLT_CALLBACK_DATA structure does not have an IO priority, the routine returns IoPriorityNormal.
If an error occurs retrieving the hint, the routine returns IoPriorityNormal.
Remarks
This routine is NONPAGED and can be called from paging IO paths.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Available in Windows Vista and later Windows operating systems. |
| Target Platform | Universal |
| Header | fltkernel.h (include FltKernel.h) |
| Library | FltMgr.lib |
| DLL | Fltmgr.sys |
| IRQL | <= DISPATCH_LEVEL |
See also
FltGetIoPriorityHintFromFileObject
FltGetIoPriorityHintFromThread
FltSetIoPriorityHintIntoCallbackData
FltSetIoPriorityHintIntoFileObject