1 files changed, 12 insertions, 1 deletions
diff --git a/src/core/ext/client_config/lb_policy_factory.h b/src/core/ext/client_config/lb_policy_factory.h
index da1de3579a..7191ca7d89 100644
--- a/src/core/ext/client_config/lb_policy_factory.h
+++ b/src/core/ext/client_config/lb_policy_factory.h
@@ -47,8 +47,19 @@ struct grpc_lb_policy_factory {
   const grpc_lb_policy_factory_vtable *vtable;
 };
 
+/** A resolved address alongside any LB related information associated with it.
+ * \a user_data, if not NULL, contains opaque data meant to be consumed by the
+ * gRPC LB policy. Note that no all LB policies support \a user_data as input.
+ * Those who don't will simply ignore it and will correspondingly return NULL in
+ * their namesake pick() output argument. */
+typedef struct grpc_lb_address {
+  grpc_resolved_address *resolved_address;
+  void *user_data;
+} grpc_lb_address;
+
 typedef struct grpc_lb_policy_args {
-  grpc_resolved_addresses *addresses;
+  grpc_lb_address *addresses;
+  size_t num_addresses;
   grpc_client_channel_factory *client_channel_factory;
 } grpc_lb_policy_args;