From: Jesse Gross <jesse@nicira.com>
Date: Fri, 6 Nov 2009 22:18:58 +0000 (-0800)
Subject: udatapath: Implement ZERO_TCP_FLAGS option.
X-Git-Tag: v0.99.0~48
X-Git-Url: http://git.onelab.eu/?a=commitdiff_plain;h=fde05aded2906e113d02aa13d207d9a6e3e0ea99;p=sliver-openvswitch.git

udatapath: Implement ZERO_TCP_FLAGS option.

An option to zero the TCP flags when querying flow stats was added
to the kernel datapath to support NetFlow active timeouts.  This
adds that same support to the user datapath.
---

diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
index 4c25f1393..35724d9bf 100644
--- a/lib/dpif-netdev.c
+++ b/lib/dpif-netdev.c
@@ -665,7 +665,7 @@ dp_netdev_lookup_flow(const struct dp_netdev *dp, const flow_t *key)
 }
 
 static void
-answer_flow_query(const struct dp_netdev_flow *flow,
+answer_flow_query(struct dp_netdev_flow *flow, uint32_t query_flags,
                   struct odp_flow *odp_flow)
 {
     if (flow) {
@@ -683,6 +683,11 @@ answer_flow_query(const struct dp_netdev_flow *flow,
                    n * sizeof *odp_flow->actions);
             odp_flow->n_actions = flow->n_actions;
         }
+
+        if (query_flags & ODPFF_ZERO_TCP_FLAGS) {
+            flow->tcp_ctl = 0;
+        }
+
     } else {
         odp_flow->stats.error = ENOENT;
     }
@@ -696,7 +701,8 @@ dpif_netdev_flow_get(const struct dpif *dpif, struct odp_flow flows[], int n)
 
     for (i = 0; i < n; i++) {
         struct odp_flow *odp_flow = &flows[i];
-        answer_flow_query(dp_netdev_lookup_flow(dp, &odp_flow->key), odp_flow);
+        answer_flow_query(dp_netdev_lookup_flow(dp, &odp_flow->key),
+                          odp_flow->flags, odp_flow);
     }
     return 0;
 }
@@ -852,7 +858,7 @@ dpif_netdev_flow_del(struct dpif *dpif, struct odp_flow *odp_flow)
 
     flow = dp_netdev_lookup_flow(dp, &odp_flow->key);
     if (flow) {
-        answer_flow_query(flow, odp_flow);
+        answer_flow_query(flow, 0, odp_flow);
         dp_netdev_free_flow(dp, flow);
         return 0;
     } else {
@@ -872,7 +878,7 @@ dpif_netdev_flow_list(const struct dpif *dpif, struct odp_flow flows[], int n)
         if (i >= n) {
             break;
         }
-        answer_flow_query(flow, &flows[i++]);
+        answer_flow_query(flow, 0, &flows[i++]);
     }
     return hmap_count(&dp->flow_table);
 }