Checking the Oplock State of an IRP_MJ_CLEANUP operation

The following oplock break conditions apply only when a stream is being closed.

Conditions for Level 2 and Read request types

• Always break to None. Note that other Level 2 or Read oplocks on the same stream are not affected; only the Level 2 or Read oplock associated with this FILE_OBJECT is broken.

• No acknowledgment is required; the operation proceeds immediately.

Conditions for Level 1, Batch, Filter, Read-Handle, Read-Write, and Read-Write-Handle request types

• Always break to None.

• No acknowledgment is required; the operation proceeds immediately. Note that any I/O operations (IRPs) waiting for an acknowledgment from a pending break request are completed immediately.