datapath: Use TCP flags in the flow key for stats.

We already extract the TCP flags for the key, might as well use that
for stats.

Signed-off-by: Jarno Rajahalme <jrajahalme@nicira.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>

diff --git a/datapath/flow.c b/datapath/flow.c
index e9a2a27..30e0ab8 100644 (file)
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -70,14 +70,12 @@ void ovs_flow_stats_update(struct sw_flow *flow, struct sk_buff *skb)
 
        stats = rcu_dereference(flow->stats[node]);
 
-       if ((flow->key.eth.type == htons(ETH_P_IP) ||
-            flow->key.eth.type == htons(ETH_P_IPV6)) &&
-           flow->key.ip.frag != OVS_FRAG_TYPE_LATER &&
-           flow->key.ip.proto == IPPROTO_TCP &&
-           likely(skb->len >= skb_transport_offset(skb) + sizeof(struct tcphdr))) {
-               tcp_flags = TCP_FLAGS_BE16(tcp_hdr(skb));
+       if (likely(flow->key.ip.proto == IPPROTO_TCP)) {
+               if (likely(flow->key.eth.type == htons(ETH_P_IP)))
+                       tcp_flags = flow->key.ipv4.tp.flags;
+               else if (likely(flow->key.eth.type == htons(ETH_P_IPV6)))
+                       tcp_flags = flow->key.ipv6.tp.flags;
        }
-
        /* Check if already have node-specific stats. */
        if (likely(stats)) {
                spin_lock(&stats->lock);