net_sched: cls_flow: add key rxhash

We can use rxhash to classify the traffic into flows. As rxhash maybe supplied by NIC or RPS, it is cheaper. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>

net_sched: cls_flow: add key rxhash
We can use rxhash to classify the traffic into flows. As rxhash maybe supplied by NIC or RPS, it is cheaper. Signed-off-by: Changli Gao <xiaosuo@gmail.com> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
Changli Gao · David S. Miller
1 parent 81ce790bd7
Showing 2 changed files with 8 additions and 0 deletions Side-by-side Diff
include/linux/pkt_cls.h
net/sched/cls_flow.c
@@ -332,6 +332,7 @@
 	FLOW_KEY_SKUID,
 	FLOW_KEY_SKGID,
 	FLOW_KEY_VLAN_TAG,
+	FLOW_KEY_RXHASH,
 	__FLOW_KEY_MAX,
 };
  
@@ -306,6 +306,11 @@
 	return tag & VLAN_VID_MASK;
 }
  
+static u32 flow_get_rxhash(struct sk_buff *skb)
+{
+	return skb_get_rxhash(skb);
+}
+
 static u32 flow_key_get(struct sk_buff *skb, int key)
 {
 	switch (key) {
@@ -343,6 +348,8 @@
 		return flow_get_skgid(skb);
 	case FLOW_KEY_VLAN_TAG:
 		return flow_get_vlan_tag(skb);
+	case FLOW_KEY_RXHASH:
+		return flow_get_rxhash(skb);
 	default:
 		WARN_ON(1);
 		return 0;
...	...	@@ -332,6 +332,7 @@
332	332	FLOW_KEY_SKUID,
333	333	FLOW_KEY_SKGID,
334	334	FLOW_KEY_VLAN_TAG,
	335	+ FLOW_KEY_RXHASH,
335	336	__FLOW_KEY_MAX,
336	337	};
337	338
...	...	@@ -306,6 +306,11 @@
306	306	return tag & VLAN_VID_MASK;
307	307	}
308	308
	309	+static u32 flow_get_rxhash(struct sk_buff *skb)
	310	+{
	311	+ return skb_get_rxhash(skb);
	312	+}
	313	+
309	314	static u32 flow_key_get(struct sk_buff *skb, int key)
310	315	{
311	316	switch (key) {
...	...	@@ -343,6 +348,8 @@
343	348	return flow_get_skgid(skb);
344	349	case FLOW_KEY_VLAN_TAG:
345	350	return flow_get_vlan_tag(skb);
	351	+ case FLOW_KEY_RXHASH:
	352	+ return flow_get_rxhash(skb);
346	353	default:
347	354	WARN_ON(1);
348	355	return 0;