[ovs-dev] [PATCH 1/4] ofproto-dpif-xlate: Only learn MAC addresses upon handling packets.

[Ben Pfaff]

MAC learning, like flow entry learning via the "learn" action, should only
happen if a packet was actually received.

Signed-off-by: Ben Pfaff <blp at nicira.com>
---
 ofproto/ofproto-dpif-xlate.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/ofproto/ofproto-dpif-xlate.c b/ofproto/ofproto-dpif-xlate.c
index 73bb22e..dbfda08 100644
--- a/ofproto/ofproto-dpif-xlate.c
+++ b/ofproto/ofproto-dpif-xlate.c
@@ -4319,8 +4319,10 @@ xlate_push_stats(struct xlate_cache *xcache, bool may_learn,
             }
             break;
         case XC_NORMAL:
-            xlate_cache_normal(entry->u.normal.ofproto, entry->u.normal.flow,
-                               entry->u.normal.vlan);
+            if (may_learn) {
+                xlate_cache_normal(entry->u.normal.ofproto,
+                                   entry->u.normal.flow, entry->u.normal.vlan);
+            }
             break;
         case XC_FIN_TIMEOUT:
             xlate_fin_timeout__(entry->u.fin.rule, stats->tcp_flags,
-- 
1.7.10.4