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net: flow_offload: skip hw stats check for FLOW_ACTION_HW_STATS_DONT_CARE

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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: 319a1d1947 ("flow_offload: check for basic action hw stats type")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso
2020-05-06 20:34:50 +02:00
committed by David S. Miller
parent b0956956bb
commit 16f8036086
3 changed files with 22 additions and 4 deletions
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14
net/sched/cls_api.c
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@@ -3523,6 +3523,16 @@ static void tcf_sample_get_group(struct flow_action_entry *entry,
#endif
}
static enum flow_action_hw_stats tc_act_hw_stats(u8 hw_stats)
{
if (WARN_ON_ONCE(hw_stats > TCA_ACT_HW_STATS_ANY))
return FLOW_ACTION_HW_STATS_DONT_CARE;
else if (!hw_stats)
return FLOW_ACTION_HW_STATS_DISABLED;
return hw_stats;
}
int tc_setup_flow_action(struct flow_action *flow_action,
const struct tcf_exts *exts)
{
@@ -3546,7 +3556,7 @@ int tc_setup_flow_action(struct flow_action *flow_action,
if (err)
goto err_out_locked;
entry->hw_stats = act->hw_stats;
entry->hw_stats = tc_act_hw_stats(act->hw_stats);
if (is_tcf_gact_ok(act)) {
entry->id = FLOW_ACTION_ACCEPT;
@@ -3614,7 +3624,7 @@ int tc_setup_flow_action(struct flow_action *flow_action,
entry->mangle.mask = tcf_pedit_mask(act, k);
entry->mangle.val = tcf_pedit_val(act, k);
entry->mangle.offset = tcf_pedit_offset(act, k);
entry->hw_stats = act->hw_stats;
entry->hw_stats = tc_act_hw_stats(act->hw_stats);
entry = &flow_action->entries[++j];
}
} else if (is_tcf_csum(act)) {