From 9ec138101f8a79007bc571174976a7814ed616f8 Mon Sep 17 00:00:00 2001
From: Patrick McHardy <kaber@trash.net>
Date: Tue, 5 Feb 2008 16:21:04 -0800
Subject: [PATCH] [NET_SCHED]: cls_flow: support classification based on VLAN
 tag

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/linux/pkt_cls.h |  1 +
 net/sched/cls_flow.c    | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/include/linux/pkt_cls.h b/include/linux/pkt_cls.h
index 40fac8c455..28dfc61cf7 100644
--- a/include/linux/pkt_cls.h
+++ b/include/linux/pkt_cls.h
@@ -348,6 +348,7 @@ enum
 	FLOW_KEY_RTCLASSID,
 	FLOW_KEY_SKUID,
 	FLOW_KEY_SKGID,
+	FLOW_KEY_VLAN_TAG,
 	__FLOW_KEY_MAX,
 };
 
diff --git a/net/sched/cls_flow.c b/net/sched/cls_flow.c
index eeb223cf14..971b867e04 100644
--- a/net/sched/cls_flow.c
+++ b/net/sched/cls_flow.c
@@ -19,6 +19,7 @@
 #include <linux/in.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
+#include <linux/if_vlan.h>
 
 #include <net/pkt_cls.h>
 #include <net/ip.h>
@@ -270,6 +271,15 @@ static u32 flow_get_skgid(const struct sk_buff *skb)
 	return 0;
 }
 
+static u32 flow_get_vlan_tag(const struct sk_buff *skb)
+{
+	u16 uninitialized_var(tag);
+
+	if (vlan_get_tag(skb, &tag) < 0)
+		return 0;
+	return tag & VLAN_VID_MASK;
+}
+
 static u32 flow_key_get(const struct sk_buff *skb, int key)
 {
 	switch (key) {
@@ -305,6 +315,8 @@ static u32 flow_key_get(const struct sk_buff *skb, int key)
 		return flow_get_skuid(skb);
 	case FLOW_KEY_SKGID:
 		return flow_get_skgid(skb);
+	case FLOW_KEY_VLAN_TAG:
+		return flow_get_vlan_tag(skb);
 	default:
 		WARN_ON(1);
 		return 0;
-- 
2.39.5