1 files changed, 20 insertions, 0 deletions
diff --git a/src/core/lib/channel/channelz.h b/src/core/lib/channel/channelz.h
index 4794a280d0..07eb73d626 100644
--- a/src/core/lib/channel/channelz.h
+++ b/src/core/lib/channel/channelz.h
@@ -68,6 +68,8 @@ class ChannelNode : public RefCounted<ChannelNode> {
   // instead of lib/
   virtual void PopulateConnectivityState(grpc_json* json);
 
+  virtual void PopulateChildRefs(grpc_json* json);
+
   ChannelTrace* trace() { return trace_.get(); }
 
   void MarkChannelDestroyed() {
@@ -102,6 +104,24 @@ class ChannelNode : public RefCounted<ChannelNode> {
   ManualConstructor<ChannelTrace> trace_;
 };
 
+// Placeholds channelz class for subchannels. All this can do now is track its
+// uuid (this information is needed by the parent channelz class).
+// TODO(ncteisen): build this out to support the GetSubchannel channelz request.
+class SubchannelNode : public RefCounted<SubchannelNode> {
+ public:
+  SubchannelNode();
+  virtual ~SubchannelNode();
+
+  intptr_t subchannel_uuid() { return subchannel_uuid_; }
+
+ protected:
+  GPRC_ALLOW_CLASS_TO_USE_NON_PUBLIC_DELETE
+  GPRC_ALLOW_CLASS_TO_USE_NON_PUBLIC_NEW
+
+ private:
+  intptr_t subchannel_uuid_;
+};
+
 // Creation functions
 
 typedef RefCountedPtr<ChannelNode> (*ChannelNodeCreationFunc)(grpc_channel*,