[PATCH v6 1/2] ethdev: add query_update sync and async function calls

[Andrew Rybchenko]

On 1/20/23 13:46, Gregory Etelson wrote:
>>> and it's async version `rte_flow_async_action_handle_query_update`
>>> to atomically query and update flow action.
>>
>> Sorry, may be I'm missing something, but after reading previous
>> discussion I have a feeling that update could be queried data
>> dependent. However, I don't understand how it could be possible
>> with API below. Just my misunderstanding?
>>
> 
> The goal of `rte_flow_action_handle_query_update()` is to execute query and update actions atomically.
> The function guaranties that action state will not change by any event before both update and query complete.
> If the function was called with the ` RTE_FLOW_QU_QUERY_FIRST ` `mode` argument, then update execution can depend
> on query result. That's up to query format, PMD implementation and hardware capabilities.
> I hope that answered your question.

Sorry, I'm still confused. Could you explain a bit more,
please. How update could depend on query result?
Caller already specified update structure...