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authorPablo Neira Ayuso <pablo@netfilter.org>2020-05-06 20:34:50 +0200
committerDavid S. Miller <davem@davemloft.net>2020-05-06 20:13:10 -0700
commit16f8036086a929694c3c62f577bb5925fe4fd607 (patch)
tree23ecfc61c1efb40e0f8fb93993cd3e1a6d870b19 /net
parentb0956956bbd7b8c93112269a1e9c8309b0ceb0e7 (diff)
downloadlinux-16f8036086a929694c3c62f577bb5925fe4fd607.tar.bz2
net: flow_offload: skip hw stats check for FLOW_ACTION_HW_STATS_DONT_CARE
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@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sched/cls_api.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index c0e5b64b3caf..0a7ecc292bd3 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -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)) {