FltGetVolumeContext function

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NTSTATUS FLTAPI FltGetVolumeContext(
  PFLT_FILTER  Filter,
  PFLT_VOLUME  Volume,
  PFLT_CONTEXT *Context
);

Parameters

Filter

Opaque filter pointer for the caller. This parameter is required and cannot be NULL.

Volume

Opaque pointer for the volume whose context is being retrieved. This parameter is required and cannot be NULL.

Context

Pointer to a caller-allocated variable that receives the address of the requested context.

Return value

FltGetVolumeContext returns STATUS_SUCCESS or an appropriate NTSTATUS value, such as the following:

Remarks

FltGetVolumeContext increments the reference count on the context that the Context parameter points to. When this context pointer is no longer needed, the caller must decrement its reference count by calling FltReleaseContext. Thus every successful call to FltGetVolumeContext must be matched by a subsequent call to FltReleaseContext.

To set a context for a volume, call FltSetVolumeContext.

To allocate a new context, call FltAllocateContext.

To delete a volume context, call FltDeleteVolumeContext or FltDeleteContext.

Requirements