netdev - [PATCH net-next 2/5] net/sched: flower: Add support for matching on vlan ethertype

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Message-Id: <20180630095317.5691-3-jianbol@mellanox.com>
Date:   Sat, 30 Jun 2018 09:53:14 +0000
From:   Jianbo Liu <jianbol@...lanox.com>
To:     netdev@...r.kernel.org, davem@...emloft.net, jiri@...nulli.us
Cc:     Jianbo Liu <jianbol@...lanox.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>
Subject: [PATCH net-next 2/5] net/sched: flower: Add support for matching on vlan ethertype

As flow dissector stores vlan ethertype, tc flower now can match on that.
It is to make preparation for supporting QinQ.

Signed-off-by: Jianbo Liu <jianbol@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
---
 net/sched/cls_flower.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 4e74508..e6774af 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -483,6 +483,7 @@ static int fl_set_key_mpls(struct nlattr **tb,
 }
 
 static void fl_set_key_vlan(struct nlattr **tb,
+			    __be16 ethertype,
 			    struct flow_dissector_key_vlan *key_val,
 			    struct flow_dissector_key_vlan *key_mask)
 {
@@ -499,6 +500,8 @@ static void fl_set_key_vlan(struct nlattr **tb,
 			VLAN_PRIORITY_MASK;
 		key_mask->vlan_priority = VLAN_PRIORITY_MASK;
 	}
+	key_val->vlan_tpid = ethertype;
+	key_mask->vlan_tpid = cpu_to_be16(~0);
 }
 
 static void fl_set_key_flag(u32 flower_key, u32 flower_mask,
@@ -575,8 +578,8 @@ static int fl_set_key(struct net *net, struct nlattr **tb,
 	if (tb[TCA_FLOWER_KEY_ETH_TYPE]) {
 		ethertype = nla_get_be16(tb[TCA_FLOWER_KEY_ETH_TYPE]);
 
-		if (ethertype == htons(ETH_P_8021Q)) {
-			fl_set_key_vlan(tb, &key->vlan, &mask->vlan);
+		if (eth_type_vlan(ethertype)) {
+			fl_set_key_vlan(tb, ethertype, &key->vlan, &mask->vlan);
 			fl_set_key_val(tb, &key->basic.n_proto,
 				       TCA_FLOWER_KEY_VLAN_ETH_TYPE,
 				       &mask->basic.n_proto, TCA_FLOWER_UNSPEC,
-- 
2.9.5