The FltPrepareComplete routine acknowledges a TRANSACTION_NOTIFY_PREPARE notification.
NTSTATUS FltPrepareComplete( _In_ PFLT_INSTANCE Instance, _In_ PKTRANSACTION Transaction, _In_opt_ PFLT_CONTEXT TransactionContext );
- Instance [in]
Opaque instance pointer for the caller.
- Transaction [in]
Opaque transaction pointer for the transaction.
- TransactionContext [in, optional]
Pointer to the minifilter driver's transaction context.
FltPrepareComplete returns STATUS_SUCCESS or an appropriate NTSTATUS value, such as the following:
The minifilter driver did not set a context on the transaction. This is an error code.
A minifilter driver that is enlisted in a transaction can receive a TRANSACTION_NOTIFY_PREPARE notification when the transaction enters the prepare for commit phase. To send the notification to the minifilter driver, the filter manager calls the minifilter driver's TransactionNotificationCallback routine. The minifilter driver acknowledges this notification in one of two ways:
The minifilter driver's TransactionNotificationCallback routine performs any needed processing and returns STATUS_SUCCESS. In this case, the minifilter driver does not call FltPrepareComplete.
The minifilter driver's TransactionNotificationCallback routine posts any needed processing to a worker thread and returns STATUS_PENDING. After performing the processing asynchronously, the minifilter driver's work routine must call FltPrepareComplete to indicate that it has finished this processing. If the minifilter driver's work routine does not call FltPrepareComplete, the transaction prepare operation cannot be completed by the kernel transaction manager.
To register a TransactionNotificationCallback routine, a minifilter driver stores the address of a routine of type PFLT_TRANSACTION_NOTIFICATION_CALLBACK in the TransactionNotificationCallback member of the FLT_REGISTRATION structure that the minifilter driver passes as the Registration parameter of FltRegisterFilter.
To enlist in a transaction, call FltEnlistInTransaction.
To allocate a new transaction context, call FltAllocateContext.
To retrieve a transaction context, call FltGetTransactionContext.
To set a transaction context, call FltSetTransactionContext.
|The FltPrepareComplete routine is available on Windows Vista and later.|