PFLT_TRANSACTION_NOTIFICATION_CALLBACK callback function (fltkernel.h)
A minifilter driver can register a routine of type PFLT_TRANSACTION_NOTIFICATION_CALLBACK as its TransactionNotificationCallback routine.
Syntax
PFLT_TRANSACTION_NOTIFICATION_CALLBACK PfltTransactionNotificationCallback;
NTSTATUS PfltTransactionNotificationCallback(
[in] PCFLT_RELATED_OBJECTS FltObjects,
[in] PFLT_CONTEXT TransactionContext,
[in] ULONG NotificationMask
)
{...}
Parameters
[in] FltObjects
Pointer to an FLT_RELATED_OBJECTS structure that contains opaque pointers for the objects related to the current operation.
[in] TransactionContext
Pointer to the minifilter driver's transaction context.
[in] NotificationMask
Specifies the type of notifications that the filter manager is sending to the minifilter driver, as one of the following values.
| Value | Meaning |
|---|---|
| TRANSACTION_NOTIFY_COMMIT | This notification is sent when the transaction is being committed. |
| TRANSACTION_NOTIFY_COMMIT_FINALIZE | For Windows Vista SP1 and later, this notification is sent when the transaction is fully committed (that is, when all of the resource managers associated with the transaction, such as TxF, have committed). |
| TRANSACTION_NOTIFY_PREPARE | This notification is sent when the transaction enters the prepare for commit phase. |
| TRANSACTION_NOTIFY_PREPREPARE | This notification is sent when the transaction enters the pre-prepare for commit phase. |
| TRANSACTION_NOTIFY_ROLLBACK | This notification is sent when the transaction is being rolled back or aborted. |
Return value
The PFLT_TRANSACTION_NOTIFICATION_CALLBACK routine returns one of the following NTSTATUS values:
| Return code | Description |
|---|---|
|
Returning this status value indicates that the minifilter driver is finished with the transaction. This is a success code. |
|
Returning this status value indicates that the minifilter driver is not yet finished with the transaction. This is a success code. |
Remarks
When a minifilter driver registers itself by calling FltRegisterFilter from its DriverEntry routine, it can register a routine of type PFLT_TRANSACTION_NOTIFICATION_CALLBACK as the minifilter's TransactionNotificationCallback routine.
To register the TransactionNotificationCallback routine, the 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.
The filter manager calls this routine to notify the minifilter driver about the status of a transaction that the minifilter driver is enlisted in.
If the minifilter driver returns STATUS_PENDING from this callback routine, it must eventually call one of the following routines to indicate that it has finished processing the notification:
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | The PFLT_TRANSACTION_NOTIFICATION_CALLBACK routine is available on Windows Vista and later. |
| Target Platform | Desktop |
| Header | fltkernel.h (include Fltkernel.h) |
| IRQL | PASSIVE_LEVEL |