ofproto-dpif-xlate: Allow translating without side-effects.

Extend 'may_learn' attribute to also control the treatment of
FIN_TIMEOUT action and asynchronous messages (packet ins,
continuations), so that when 'may_learn' is 'false' and
'resubmit_stats' is 'NULL', no OpenFlow-visible side effects are
generated by the translation.

Correspondingly, add support for one-time asynchronous messages to
xlate cache, so that all side-effects of the translation may be
executed at a later stage.  This will be useful for bundle commits.

Signed-off-by: Jarno Rajahalme <jarno@ovn.org>
Acked-by: Ben Pfaff <blp@ovn.org>

1 files changed, 7 insertions, 2 deletions

diff --git a/ofproto/ofproto-dpif-xlate-cache.h b/ofproto/ofproto-dpif-xlate-cache.h
index 3643177f0..4b30181a7 100644
--- a/ofproto/ofproto-dpif-xlate-cache.h
+++ b/ofproto/ofproto-dpif-xlate-cache.h
@@ -46,11 +46,12 @@ enum xc_type {
     XC_NETDEV,
     XC_NETFLOW,
     XC_MIRROR,
-    XC_LEARN,
+    XC_LEARN,            /* Calls back to ofproto. */
     XC_NORMAL,
-    XC_FIN_TIMEOUT,
+    XC_FIN_TIMEOUT,      /* Calls back to ofproto. */
     XC_GROUP,
     XC_TNL_NEIGH,
+    XC_CONTROLLER,
 };
 
 /* xlate_cache entries hold enough information to perform the side effects of
@@ -113,6 +114,10 @@ struct xc_entry {
             char br_name[IFNAMSIZ];
             struct in6_addr d_ipv6;
         } tnl_neigh_cache;
+        struct {
+            struct ofproto_dpif *ofproto;
+            struct ofproto_async_msg *am;
+        } controller;
     };
 };