Tue, May 05, 2020 at 08:46:16PM CEST, kuba@xxxxxxxxxx wrote:
>On Tue, 5 May 2020 20:36:43 +0200 Jiri Pirko wrote:
>> Tue, May 05, 2020 at 07:47:36PM CEST, pablo@xxxxxxxxxxxxx wrote:
>> >This patch adds FLOW_ACTION_HW_STATS_DONT_CARE which tells the driver
>> >that the frontend does not need counters, this hw stats type request
>> >never fails. The FLOW_ACTION_HW_STATS_DISABLED type explicitly requests
>> >the driver to disable the stats, however, if the driver cannot disable
>> >counters, it bails out.
>> >
>> >TCA_ACT_HW_STATS_* maintains the 1:1 mapping with FLOW_ACTION_HW_STATS_*
>> >except by disabled which is mapped to FLOW_ACTION_HW_STATS_DISABLED
>> >(this is 0 in tc). Add tc_act_hw_stats() to perform the mapping between
>> >TCA_ACT_HW_STATS_* and FLOW_ACTION_HW_STATS_*.
>> >
>> >Fixes: 319a1d19471e ("flow_offload: check for basic action hw stats type")
>> >Signed-off-by: Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>
>>
>> Looks great. Thanks!
>>
>> Reviewed-by: Jiri Pirko <jiri@xxxxxxxxxxxx>
>
>Is this going to "just work" for mlxsw?
>
> act = flow_action_first_entry_get(flow_action);
> if (act->hw_stats == FLOW_ACTION_HW_STATS_ANY ||
> act->hw_stats == FLOW_ACTION_HW_STATS_IMMEDIATE) {
> /* Count action is inserted first */
> err = mlxsw_sp_acl_rulei_act_count(mlxsw_sp, rulei, extack);
> if (err)
> return err;
> } else if (act->hw_stats != FLOW_ACTION_HW_STATS_DISABLED) {
> NL_SET_ERR_MSG_MOD(extack, "Unsupported action HW stats type");
> return -EOPNOTSUPP;
> }
>
>if hw_stats is 0 we'll get into the else and bail.
>
>That doesn't deliver on the "don't care" promise, no?
Yeah, we need to handle dontcare there, you are right.
