X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=datapath%2Fflow.c;h=eb67cf4503ec08f84647792bfb0e8b60f17c5af6;hb=6767a2cce9a6412b3a41a927c4d56b9f0e1ec36f;hp=e90b36a93b5a37f2171d540216a1f277b6f7cd52;hpb=37a1300c3ca05a97160d44dc34298c447b50ed9d;p=openvswitch

diff --git a/datapath/flow.c b/datapath/flow.c
index e90b36a9..eb67cf45 100644
--- a/datapath/flow.c
+++ b/datapath/flow.c
@@ -82,6 +82,20 @@ static inline bool icmphdr_ok(struct sk_buff *skb)
 	return skb->len >= skb_transport_offset(skb) + sizeof(struct icmphdr);
 }
 
+u64 flow_used_time(unsigned long flow_jiffies)
+{
+	struct timespec cur_ts;
+	u64 cur_ms, idle_ms;
+
+	ktime_get_ts(&cur_ts);
+	idle_ms = jiffies_to_msecs(jiffies - flow_jiffies);
+	cur_ms = (u64)cur_ts.tv_sec * MSEC_PER_SEC +
+		 cur_ts.tv_nsec / NSEC_PER_MSEC;
+
+	return cur_ms - idle_ms;
+}
+
+
 #define TCP_FLAGS_OFFSET 13
 #define TCP_FLAG_MASK 0x3f