[RFC 2/2] ethdev: queue-based flow aged report

[Thomas Monjalon]

31/05/2022 13:06, Jack Min:
> On 5/31/22 00:42, Thomas Monjalon wrote:
> > 07/04/2022 07:30, Xiaoyu Min:
> >> + * If queue-based flow rule management is used and port configured with
> >> + * flag RTE_FLOW_PORT_FLAG_STRICT_QUEUE, RTE_ETH_EVENT_FLOW_AGED event
> >> + * is triggered with ret_param set to the corresponding flow queue when
> >> + * a flow queue detects new aged-out flows.
> > 
> > Are you sure it is a good idea to use ret_param for such data?
> 
> Well, it seems the only way to add queue information without add/change 
> APIs.
> 
> > ret_param of an event is supposed to be used by the driver
> > to get a confirmation from the application.
> >
> > If the application needs extra info of an event,
> > it is better to do a separate query like rte_flow_get_aged_flows().
> 
> Ok, since the *ret_param* is supposed to be used by driver, then the 
> above approach is not a good idea.
> 
> So we need a new API, something like rte_flow_get_aged_event_queues(), 
> which will return
> 
> all flow queues which has the aged flows, right?

Yes, a new function seems required.