net: qos: add tc police offloading action with max frame size limit

Current police offloading support the 'burst'' and 'rate_bytes_ps'. Some
hardware own the capability to limit the frame size. If the frame size
larger than the setting, the frame would be dropped. For the police
action itself already accept the 'mtu' parameter in tc command. But not
extend to tc flower offloading. So extend 'mtu' to tc flower offloading.

Signed-off-by: Po Liu <Po.Liu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 00c15f1..c2ef19c 100644 (file)
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -234,6 +234,7 @@ struct flow_action_entry {
                struct {                                /* FLOW_ACTION_POLICE */
                        s64                     burst;
                        u64                     rate_bytes_ps;
+                       u32                     mtu;
                } police;
                struct {                                /* FLOW_ACTION_CT */
                        int action;

diff --git a/include/net/tc_act/tc_police.h b/include/net/tc_act/tc_police.h
index f098ad4..cd973b1 100644 (file)
--- a/include/net/tc_act/tc_police.h
+++ b/include/net/tc_act/tc_police.h
@@ -69,4 +69,14 @@ static inline s64 tcf_police_tcfp_burst(const struct tc_action *act)
        return params->tcfp_burst;
 }
 
+static inline u32 tcf_police_tcfp_mtu(const struct tc_action *act)
+{
+       struct tcf_police *police = to_police(act);
+       struct tcf_police_params *params;
+
+       params = rcu_dereference_protected(police->params,
+                                          lockdep_is_held(&police->tcf_lock));
+       return params->tcfp_mtu;
+}
+
 #endif /* __NET_TC_POLICE_H */

diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index a00a203..6aba7d5 100644 (file)
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -3658,6 +3658,7 @@ int tc_setup_flow_action(struct flow_action *flow_action,
                        entry->police.burst = tcf_police_tcfp_burst(act);
                        entry->police.rate_bytes_ps =
                                tcf_police_rate_bytes_ps(act);
+                       entry->police.mtu = tcf_police_tcfp_mtu(act);
                } else if (is_tcf_ct(act)) {
                        entry->id = FLOW_ACTION_CT;
                        entry->ct.action = tcf_ct_action(act);