flow_offload: reject offload for all drivers with invalid police parameters

As more police parameters are passed to flow_offload, driver can check
them to make sure hardware handles packets in the way indicated by tc.
The conform-exceed control should be drop/pipe or drop/ok. Besides,
for drop/ok, the police should be the last action. As hardware can't
configure peakrate/avrate/overhead, offload should not be supported if
any of them is configured.

Signed-off-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/sja1105/sja1105_flower.c

@@ -300,6 +300,46 @@ static int sja1105_flower_parse_key(struct sja1105_private *priv,
 	return -EOPNOTSUPP;
 }
 
+static int sja1105_policer_validate(const struct flow_action *action,
+				    const struct flow_action_entry *act,
+				    struct netlink_ext_ack *extack)
+{
+	if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when exceed action is not drop");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
+	    act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is not pipe or ok");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
+	    !flow_action_is_last_entry(action, act)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is ok, but action is not last");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.peakrate_bytes_ps ||
+	    act->police.avrate || act->police.overhead) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when peakrate/avrate/overhead is configured");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.rate_pkt_ps) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "QoS offload not support packets per second");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 int sja1105_cls_flower_add(struct dsa_switch *ds, int port,
 			   struct flow_cls_offload *cls, bool ingress)
 {
@@ -321,12 +361,9 @@ int sja1105_cls_flower_add(struct dsa_switch *ds, int port,
 	flow_action_for_each(i, act, &rule->action) {
 		switch (act->id) {
 		case FLOW_ACTION_POLICE:
-			if (act->police.rate_pkt_ps) {
-				NL_SET_ERR_MSG_MOD(extack,
-						   "QoS offload not support packets per second");
-				rc = -EOPNOTSUPP;
+			rc = sja1105_policer_validate(&rule->action, act, extack);
+			if (rc)
 				goto out;
-			}
 
 			rc = sja1105_flower_policer(priv, port, extack, cookie,
 						    &key,

drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_matchall.c

@@ -8,6 +8,46 @@
 #include "cxgb4_filter.h"
 #include "cxgb4_tc_flower.h"
 
+static int cxgb4_policer_validate(const struct flow_action *action,
+				  const struct flow_action_entry *act,
+				  struct netlink_ext_ack *extack)
+{
+	if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when exceed action is not drop");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
+	    act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is not pipe or ok");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
+	    !flow_action_is_last_entry(action, act)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is ok, but action is not last");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.peakrate_bytes_ps ||
+	    act->police.avrate || act->police.overhead) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when peakrate/avrate/overhead is configured");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.rate_pkt_ps) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "QoS offload not support packets per second");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 static int cxgb4_matchall_egress_validate(struct net_device *dev,
 					  struct tc_cls_matchall_offload *cls)
 {
@@ -48,11 +88,10 @@ static int cxgb4_matchall_egress_validate(struct net_device *dev,
 	flow_action_for_each(i, entry, actions) {
 		switch (entry->id) {
 		case FLOW_ACTION_POLICE:
-			if (entry->police.rate_pkt_ps) {
-				NL_SET_ERR_MSG_MOD(extack,
-						   "QoS offload not support packets per second");
-				return -EOPNOTSUPP;
-			}
+			ret = cxgb4_policer_validate(actions, entry, extack);
+			if (ret)
+				return ret;
+
 			/* Convert bytes per second to bits per second */
 			if (entry->police.rate_bytes_ps * 8 > max_link_rate) {
 				NL_SET_ERR_MSG_MOD(extack,
@@ -150,11 +189,11 @@ static int cxgb4_matchall_alloc_tc(struct net_device *dev,
 	flow_action_for_each(i, entry, &cls->rule->action)
 		if (entry->id == FLOW_ACTION_POLICE)
 			break;
-	if (entry->police.rate_pkt_ps) {
-		NL_SET_ERR_MSG_MOD(extack,
-				   "QoS offload not support packets per second");
-		return -EOPNOTSUPP;
-	}
+
+	ret = cxgb4_policer_validate(&cls->rule->action, entry, extack);
+	if (ret)
+		return ret;
+
 	/* Convert from bytes per second to Kbps */
 	p.u.params.maxrate = div_u64(entry->police.rate_bytes_ps * 8, 1000);
 	p.u.params.channel = pi->tx_chan;

drivers/net/ethernet/freescale/enetc/enetc_qos.c

@@ -1021,6 +1021,46 @@ static struct actions_fwd *enetc_check_flow_actions(u64 acts,
 	return NULL;
 }
 
+static int enetc_psfp_policer_validate(const struct flow_action *action,
+				       const struct flow_action_entry *act,
+				       struct netlink_ext_ack *extack)
+{
+	if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when exceed action is not drop");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
+	    act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is not pipe or ok");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
+	    !flow_action_is_last_entry(action, act)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is ok, but action is not last");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.peakrate_bytes_ps ||
+	    act->police.avrate || act->police.overhead) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when peakrate/avrate/overhead is configured");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.rate_pkt_ps) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "QoS offload not support packets per second");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 static int enetc_psfp_parse_clsflower(struct enetc_ndev_priv *priv,
 				      struct flow_cls_offload *f)
 {
@@ -1177,11 +1217,10 @@ static int enetc_psfp_parse_clsflower(struct enetc_ndev_priv *priv,
 
 	/* Flow meter and max frame size */
 	if (entryp) {
-		if (entryp->police.rate_pkt_ps) {
-			NL_SET_ERR_MSG_MOD(extack, "QoS offload not support packets per second");
-			err = -EOPNOTSUPP;
+		err = enetc_psfp_policer_validate(&rule->action, entryp, extack);
+		if (err)
 			goto free_sfi;
-		}
+
 		if (entryp->police.burst) {
 			fmi = kzalloc(sizeof(*fmi), GFP_KERNEL);
 			if (!fmi) {

drivers/net/ethernet/marvell/octeontx2/nic/otx2_tc.c

@@ -190,6 +190,40 @@ static int otx2_tc_validate_flow(struct otx2_nic *nic,
 	return 0;
 }
 
+static int otx2_policer_validate(const struct flow_action *action,
+				 const struct flow_action_entry *act,
+				 struct netlink_ext_ack *extack)
+{
+	if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when exceed action is not drop");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
+	    act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is not pipe or ok");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
+	    !flow_action_is_last_entry(action, act)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is ok, but action is not last");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.peakrate_bytes_ps ||
+	    act->police.avrate || act->police.overhead) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when peakrate/avrate/overhead is configured");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 static int otx2_tc_egress_matchall_install(struct otx2_nic *nic,
 					   struct tc_cls_matchall_offload *cls)
 {
@@ -212,6 +246,10 @@ static int otx2_tc_egress_matchall_install(struct otx2_nic *nic,
 	entry = &cls->rule->action.entries[0];
 	switch (entry->id) {
 	case FLOW_ACTION_POLICE:
+		err = otx2_policer_validate(&cls->rule->action, entry, extack);
+		if (err)
+			return err;
+
 		if (entry->police.rate_pkt_ps) {
 			NL_SET_ERR_MSG_MOD(extack, "QoS offload not support packets per second");
 			return -EOPNOTSUPP;
@@ -315,6 +353,7 @@ static int otx2_tc_parse_actions(struct otx2_nic *nic,
 	u8 nr_police = 0;
 	bool pps = false;
 	u64 rate;
+	int err;
 	int i;
 
 	if (!flow_action_has_entries(flow_action)) {
@@ -355,6 +394,10 @@ static int otx2_tc_parse_actions(struct otx2_nic *nic,
 				return -EOPNOTSUPP;
 			}
 
+			err = otx2_policer_validate(flow_action, act, extack);
+			if (err)
+				return err;
+
 			if (act->police.rate_bytes_ps > 0) {
 				rate = act->police.rate_bytes_ps * 8;
 				burst = act->police.burst;

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

@@ -4482,6 +4482,46 @@ static int apply_police_params(struct mlx5e_priv *priv, u64 rate,
 	return err;
 }
 
+static int mlx5e_policer_validate(const struct flow_action *action,
+				  const struct flow_action_entry *act,
+				  struct netlink_ext_ack *extack)
+{
+	if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when exceed action is not drop");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
+	    act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is not pipe or ok");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
+	    !flow_action_is_last_entry(action, act)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is ok, but action is not last");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.peakrate_bytes_ps ||
+	    act->police.avrate || act->police.overhead) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when peakrate/avrate/overhead is configured");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.rate_pkt_ps) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "QoS offload not support packets per second");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 static int scan_tc_matchall_fdb_actions(struct mlx5e_priv *priv,
 					struct flow_action *flow_action,
 					struct netlink_ext_ack *extack)
@@ -4509,10 +4549,10 @@ static int scan_tc_matchall_fdb_actions(struct mlx5e_priv *priv,
 	flow_action_for_each(i, act, flow_action) {
 		switch (act->id) {
 		case FLOW_ACTION_POLICE:
-			if (act->police.rate_pkt_ps) {
-				NL_SET_ERR_MSG_MOD(extack, "QoS offload not support packets per second");
-				return -EOPNOTSUPP;
-			}
+			err = mlx5e_policer_validate(flow_action, act, extack);
+			if (err)
+				return err;
+
 			err = apply_police_params(priv, act->police.rate_bytes_ps, extack);
 			if (err)
 				return err;

drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c

@@ -15,6 +15,46 @@
 #include "spectrum.h"
 #include "core_acl_flex_keys.h"
 
+static int mlxsw_sp_policer_validate(const struct flow_action *action,
+				     const struct flow_action_entry *act,
+				     struct netlink_ext_ack *extack)
+{
+	if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when exceed action is not drop");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
+	    act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is not pipe or ok");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
+	    !flow_action_is_last_entry(action, act)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is ok, but action is not last");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.peakrate_bytes_ps ||
+	    act->police.avrate || act->police.overhead) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when peakrate/avrate/overhead is configured");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.rate_pkt_ps) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "QoS offload not support packets per second");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp,
 					 struct mlxsw_sp_flow_block *block,
 					 struct mlxsw_sp_acl_rule_info *rulei,
@@ -191,10 +231,9 @@ static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp,
 				return -EOPNOTSUPP;
 			}
 
-			if (act->police.rate_pkt_ps) {
-				NL_SET_ERR_MSG_MOD(extack, "QoS offload not support packets per second");
-				return -EOPNOTSUPP;
-			}
+			err = mlxsw_sp_policer_validate(flow_action, act, extack);
+			if (err)
+				return err;
 
 			/* The kernel might adjust the requested burst size so
 			 * that it is not exactly a power of two. Re-adjust it

drivers/net/ethernet/mscc/ocelot_flower.c

@@ -6,6 +6,7 @@
 #include <net/pkt_cls.h>
 #include <net/tc_act/tc_gact.h>
 #include <soc/mscc/ocelot_vcap.h>
+#include "ocelot_police.h"
 #include "ocelot_vcap.h"
 
 /* Arbitrarily chosen constants for encoding the VCAP block and lookup number
@@ -217,6 +218,7 @@ static int ocelot_flower_parse_action(struct ocelot *ocelot, int port,
 				      bool ingress, struct flow_cls_offload *f,
 				      struct ocelot_vcap_filter *filter)
 {
+	const struct flow_action *action = &f->rule->action;
 	struct netlink_ext_ack *extack = f->common.extack;
 	bool allow_missing_goto_target = false;
 	const struct flow_action_entry *a;
@@ -244,7 +246,7 @@ static int ocelot_flower_parse_action(struct ocelot *ocelot, int port,
 	filter->goto_target = -1;
 	filter->type = OCELOT_VCAP_FILTER_DUMMY;
 
-	flow_action_for_each(i, a, &f->rule->action) {
+	flow_action_for_each(i, a, action) {
 		switch (a->id) {
 		case FLOW_ACTION_DROP:
 			if (filter->block_id != VCAP_IS2) {
@@ -297,11 +299,11 @@ static int ocelot_flower_parse_action(struct ocelot *ocelot, int port,
 						   "Last action must be GOTO");
 				return -EOPNOTSUPP;
 			}
-			if (a->police.rate_pkt_ps) {
-				NL_SET_ERR_MSG_MOD(extack,
-						   "QoS offload not support packets per second");
-				return -EOPNOTSUPP;
-			}
+
+			err = ocelot_policer_validate(action, a, extack);
+			if (err)
+				return err;
+
 			filter->action.police_ena = true;
 
 			pol_ix = a->hw_index + ocelot->vcap_pol.base;

drivers/net/ethernet/mscc/ocelot_net.c

@@ -14,6 +14,7 @@
 #include <linux/phy/phy.h>
 #include <net/pkt_cls.h>
 #include "ocelot.h"
+#include "ocelot_police.h"
 #include "ocelot_vcap.h"
 #include "ocelot_fdma.h"
 
@@ -258,11 +259,10 @@ static int ocelot_setup_tc_cls_matchall(struct ocelot_port_private *priv,
 			return -EEXIST;
 		}
 
-		if (action->police.rate_pkt_ps) {
-			NL_SET_ERR_MSG_MOD(extack,
-					   "QoS offload not support packets per second");
-			return -EOPNOTSUPP;
-		}
+		err = ocelot_policer_validate(&f->rule->action, action,
+					      extack);
+		if (err)
+			return err;
 
 		pol.rate = (u32)div_u64(action->police.rate_bytes_ps, 1000) * 8;
 		pol.burst = action->police.burst;

drivers/net/ethernet/mscc/ocelot_police.c

@@ -154,6 +154,47 @@ int qos_policer_conf_set(struct ocelot *ocelot, int port, u32 pol_ix,
 	return 0;
 }
 
+int ocelot_policer_validate(const struct flow_action *action,
+			    const struct flow_action_entry *a,
+			    struct netlink_ext_ack *extack)
+{
+	if (a->police.exceed.act_id != FLOW_ACTION_DROP) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when exceed action is not drop");
+		return -EOPNOTSUPP;
+	}
+
+	if (a->police.notexceed.act_id != FLOW_ACTION_PIPE &&
+	    a->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is not pipe or ok");
+		return -EOPNOTSUPP;
+	}
+
+	if (a->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
+	    !flow_action_is_last_entry(action, a)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is ok, but police action is not last");
+		return -EOPNOTSUPP;
+	}
+
+	if (a->police.peakrate_bytes_ps ||
+	    a->police.avrate || a->police.overhead) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when peakrate/avrate/overhead is configured");
+		return -EOPNOTSUPP;
+	}
+
+	if (a->police.rate_pkt_ps) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload does not support packets per second");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(ocelot_policer_validate);
+
 int ocelot_port_policer_add(struct ocelot *ocelot, int port,
 			    struct ocelot_policer *pol)
 {

drivers/net/ethernet/mscc/ocelot_police.h

@@ -8,6 +8,7 @@
 #define _MSCC_OCELOT_POLICE_H_
 
 #include "ocelot.h"
+#include <net/flow_offload.h>
 
 enum mscc_qos_rate_mode {
 	MSCC_QOS_RATE_MODE_DISABLED, /* Policer/shaper disabled */
@@ -33,4 +34,8 @@ struct qos_policer_conf {
 int qos_policer_conf_set(struct ocelot *ocelot, int port, u32 pol_ix,
 			 struct qos_policer_conf *conf);
 
+int ocelot_policer_validate(const struct flow_action *action,
+			    const struct flow_action_entry *a,
+			    struct netlink_ext_ack *extack);
+
 #endif /* _MSCC_OCELOT_POLICE_H_ */

drivers/net/ethernet/netronome/nfp/flower/qos_conf.c

@@ -117,6 +117,40 @@ int nfp_flower_offload_one_police(struct nfp_app *app, bool ingress,
 	return 0;
 }
 
+static int nfp_policer_validate(const struct flow_action *action,
+				const struct flow_action_entry *act,
+				struct netlink_ext_ack *extack)
+{
+	if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when exceed action is not drop");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
+	    act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is not pipe or ok");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
+	    !flow_action_is_last_entry(action, act)) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when conform action is ok, but action is not last");
+		return -EOPNOTSUPP;
+	}
+
+	if (act->police.peakrate_bytes_ps ||
+	    act->police.avrate || act->police.overhead) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Offload not supported when peakrate/avrate/overhead is configured");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 static int
 nfp_flower_install_rate_limiter(struct nfp_app *app, struct net_device *netdev,
 				struct tc_cls_matchall_offload *flow,
@@ -135,6 +169,7 @@ nfp_flower_install_rate_limiter(struct nfp_app *app, struct net_device *netdev,
 	u32 burst;
 	bool pps;
 	u64 rate;
+	int err;
 
 	if (!nfp_netdev_is_nfp_repr(netdev)) {
 		NL_SET_ERR_MSG_MOD(extack, "unsupported offload: qos rate limit offload not supported on higher level port");
@@ -181,6 +216,11 @@ nfp_flower_install_rate_limiter(struct nfp_app *app, struct net_device *netdev,
 					   "unsupported offload: qos rate limit offload requires police action");
 			return -EOPNOTSUPP;
 		}
+
+		err = nfp_policer_validate(&flow->rule->action, action, extack);
+		if (err)
+			return err;
+
 		if (action->police.rate_bytes_ps > 0) {
 			if (bps_num++) {
 				NL_SET_ERR_MSG_MOD(extack,

include/net/flow_offload.h

@@ -311,6 +311,12 @@ static inline bool flow_offload_has_one_action(const struct flow_action *action)
 	return action->num_entries == 1;
 }
 
+static inline bool flow_action_is_last_entry(const struct flow_action *action,
+					     const struct flow_action_entry *entry)
+{
+	return entry == &action->entries[action->num_entries - 1];
+}
+
 #define flow_action_for_each(__i, __act, __actions)			\
         for (__i = 0, __act = &(__actions)->entries[0];			\
 	     __i < (__actions)->num_entries;				\