From 2167c221011ef6389705b144a22c1a2bf52278a9 Mon Sep 17 00:00:00 2001
From: Steffen Smolka <smolkaj@google.com>
Date: Wed, 9 Feb 2022 12:27:19 -0800
Subject: [PATCH 1/2] Support for specifying type translations as part of the
 forwarding configuration.

---
 proto/p4/v1/p4runtime.proto | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/proto/p4/v1/p4runtime.proto b/proto/p4/v1/p4runtime.proto
index 1787f5ce..f9ff3fd5 100755
--- a/proto/p4/v1/p4runtime.proto
+++ b/proto/p4/v1/p4runtime.proto
@@ -714,6 +714,16 @@ message ForwardingPipelineConfig {
     uint64 cookie = 1;
   }
   Cookie cookie = 3;
+  // Optional: Translations for `@p4runtime_translation`-annotated types, keyed
+  // by the unique resource identifiers (URIs) of the types.
+  map<string, P4RuntimeTranslation> p4runtime_translation_by_uri = 4;
+}
+
+message P4RuntimeTranslation {
+  // Specifies the mapping between values in P4 and values in P4Runtime for
+  // some type annotated with a `@p4runtime_translation`. The mapping is
+  // required to be reversible (injective).
+  map<bytes, bytes> p4_value_by_p4runtime_value;
 }
 
 message GetForwardingPipelineConfigRequest {

From b9a833c0e08f113e9f62a39125929d012b54188b Mon Sep 17 00:00:00 2001
From: Steffen Smolka <smolkaj@google.com>
Date: Wed, 9 Feb 2022 15:04:37 -0800
Subject: [PATCH 2/2] Support static and dynamic p4runtime translations.

---
 proto/p4/v1/p4runtime.proto | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/proto/p4/v1/p4runtime.proto b/proto/p4/v1/p4runtime.proto
index f9ff3fd5..f014447f 100755
--- a/proto/p4/v1/p4runtime.proto
+++ b/proto/p4/v1/p4runtime.proto
@@ -721,9 +721,21 @@ message ForwardingPipelineConfig {
 
 message P4RuntimeTranslation {
   // Specifies the mapping between values in P4 and values in P4Runtime for
-  // some type annotated with a `@p4runtime_translation`. The mapping is
-  // required to be reversible (injective).
-  map<bytes, bytes> p4_value_by_p4runtime_value;
+  // some type annotated with a `@p4runtime_translation`.
+  oneof translation {
+    // Static mapping, given by an explicit, reversible (injective) map.
+    Static static = 1;
+    // Dynamic mapping, to be generated by the switch lazily at runtime.
+    // Whenever a P4Runtime value is seen by the switch for the first time, it
+    // is mapped to a fresh P4 value; this mapping is then persisted and applied
+    // to all further occurrences of the P4Runtime value.
+    Dynmaic dynamic = 2;
+  }
+
+  message Static {
+    map<bytes, bytes> p4_value_by_p4runtime_value = 1;
+  }
+  message Dynamic {}
 }
 
 message GetForwardingPipelineConfigRequest {