[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>

diff --git a/include/linux/pkt_cls.h b/include/linux/pkt_cls.h
index 40fac8c..28dfc61 100644 (file)
--- 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 eeb223c..971b867 100644 (file)
--- 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;