net/sched: add vlan push_eth and pop_eth action to the hardware IR

Add vlan push_eth and pop_eth action to the hardware intermediate
representation model which would subsequently allow it to be used
by drivers for offload.

Signed-off-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

include/net/flow_offload.h

@@ -150,6 +150,8 @@ enum flow_action_id {
 	FLOW_ACTION_PPPOE_PUSH,
 	FLOW_ACTION_JUMP,
 	FLOW_ACTION_PIPE,
+	FLOW_ACTION_VLAN_PUSH_ETH,
+	FLOW_ACTION_VLAN_POP_ETH,
 	NUM_FLOW_ACTIONS,
 };
 
@@ -211,6 +213,10 @@ struct flow_action_entry {
 			__be16		proto;
 			u8		prio;
 		} vlan;
+		struct {				/* FLOW_ACTION_VLAN_PUSH_ETH */
+			unsigned char dst[ETH_ALEN];
+			unsigned char src[ETH_ALEN];
+		} vlan_push_eth;
 		struct {				/* FLOW_ACTION_MANGLE */
 							/* FLOW_ACTION_ADD */
 			enum flow_action_mangle_base htype;

include/net/tc_act/tc_vlan.h

@@ -78,4 +78,14 @@ static inline u8 tcf_vlan_push_prio(const struct tc_action *a)
 
 	return tcfv_push_prio;
 }
+
+static inline void tcf_vlan_push_eth(unsigned char *src, unsigned char *dest,
+				     const struct tc_action *a)
+{
+	rcu_read_lock();
+	memcpy(dest, rcu_dereference(to_vlan(a)->vlan_p)->tcfv_push_dst, ETH_ALEN);
+	memcpy(dest, rcu_dereference(to_vlan(a)->vlan_p)->tcfv_push_src, ETH_ALEN);
+	rcu_read_unlock();
+}
+
 #endif /* __NET_TC_VLAN_H */

net/sched/act_vlan.c

@@ -390,6 +390,13 @@ static int tcf_vlan_offload_act_setup(struct tc_action *act, void *entry_data,
 			entry->vlan.proto = tcf_vlan_push_proto(act);
 			entry->vlan.prio = tcf_vlan_push_prio(act);
 			break;
+		case TCA_VLAN_ACT_POP_ETH:
+			entry->id = FLOW_ACTION_VLAN_POP_ETH;
+			break;
+		case TCA_VLAN_ACT_PUSH_ETH:
+			entry->id = FLOW_ACTION_VLAN_PUSH_ETH;
+			tcf_vlan_push_eth(entry->vlan_push_eth.src, entry->vlan_push_eth.dst, act);
+			break;
 		default:
 			return -EOPNOTSUPP;
 		}
@@ -407,6 +414,12 @@ static int tcf_vlan_offload_act_setup(struct tc_action *act, void *entry_data,
 		case TCA_VLAN_ACT_MODIFY:
 			fl_action->id = FLOW_ACTION_VLAN_MANGLE;
 			break;
+		case TCA_VLAN_ACT_POP_ETH:
+			fl_action->id = FLOW_ACTION_VLAN_POP_ETH;
+			break;
+		case TCA_VLAN_ACT_PUSH_ETH:
+			fl_action->id = FLOW_ACTION_VLAN_PUSH_ETH;
+			break;
 		default:
 			return -EOPNOTSUPP;
 		}