netdev - [PATCH net-next v2 1/3] net/sched: add vlan push_eth and pop

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Date:   Tue, 15 Mar 2022 13:02:09 +0200
From:   Roi Dayan <roid@...dia.com>
To:     <netdev@...r.kernel.org>
CC:     Roi Dayan <roid@...dia.com>, Maor Dickman <maord@...dia.com>,
        "Jakub Kicinski" <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        "Jamal Hadi Salim" <jhs@...atatu.com>, Jiri Pirko <jiri@...dia.com>
Subject: [PATCH net-next v2 1/3] net/sched: add vlan push_eth and pop_eth action to the hardware IR

From: Maor Dickman <maord@...dia.com>

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@...dia.com>
Reviewed-by: Roi Dayan <roid@...dia.com>
---
 include/net/flow_offload.h   |  6 ++++++
 include/net/tc_act/tc_vlan.h | 10 ++++++++++
 net/sched/act_vlan.c         | 13 +++++++++++++
 3 files changed, 29 insertions(+)

diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index 92267d23083e..021778a7e1af 100644
--- a/include/net/flow_offload.h
+++ b/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;
diff --git a/include/net/tc_act/tc_vlan.h b/include/net/tc_act/tc_vlan.h
index f94b8bc26f9e..a97600f742de 100644
--- a/include/net/tc_act/tc_vlan.h
+++ b/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 */
diff --git a/net/sched/act_vlan.c b/net/sched/act_vlan.c
index 756e2dcde1cd..883454c4f921 100644
--- a/net/sched/act_vlan.c
+++ b/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;
 		}
-- 
2.34.1