// ntifs.h
VOID FsRtlAcknowledgeEcp(
[in] PVOID EcpContext
);
View the official Windows Driver Kit DDI referenceNo description available.
The FsRtlAcknowledgeEcp routine marks an extra create parameter (ECP) context structure as acknowledged.
EcpContext [in]A pointer to the ECP to mark as acknowledged.
When FsRtlAcknowledgeEcp marks an ECP as acknowledged, it could indicate whether the ECP has been looked at, used, processed, or any other condition of the ECP.
You can use the FltIsEcpAcknowledged routine to determine if a particular ECP has been marked as acknowledged.
FltAllocateExtraCreateParameterFromLookasideList