Fork TLogServer into TLogServer_6_2

This prepares us for incoming modifications to the TLog that can't
easily coexist with our current on-disk state.

fdbserver/CMakeLists.txt

@@ -53,6 +53,7 @@ set(FDBSERVER_SRCS
   NetworkTest.h
   OldTLogServer_4_6.actor.cpp
   OldTLogServer_6_0.actor.cpp
+  OldTLogServer_6_2.actor.cpp
   Orderer.actor.h
   pubsub.actor.cpp
   pubsub.h

fdbserver/WorkerInterface.actor.h

@@ -467,6 +467,12 @@ ACTOR Future<Void> tLog(IKeyValueStore* persistentData, IDiskQueue* persistentQu
                         PromiseStream<InitializeTLogRequest> tlogRequests, UID tlogId, bool restoreFromDisk,
                         Promise<Void> oldLog, Promise<Void> recovered, std::string folder, Reference<AsyncVar<bool>> degraded);
 }
+namespace oldTLog_6_2 {
+ACTOR Future<Void> tLog(IKeyValueStore* persistentData, IDiskQueue* persistentQueue,
+                        Reference<AsyncVar<ServerDBInfo>> db, LocalityData locality,
+                        PromiseStream<InitializeTLogRequest> tlogRequests, UID tlogId, bool restoreFromDisk,
+                        Promise<Void> oldLog, Promise<Void> recovered, std::string folder, Reference<AsyncVar<bool>> degraded);
+}
 
 typedef decltype(&tLog) TLogFn;
 

fdbserver/fdbserver.vcxproj

@@ -68,6 +68,7 @@
     <ClCompile Include="LatencyBandConfig.cpp" />
     <ActorCompiler Include="OldTLogServer_4_6.actor.cpp" />
     <ActorCompiler Include="OldTLogServer_6_0.actor.cpp" />
+    <ActorCompiler Include="OldTLogServer_6_2.actor.cpp" />
     <ClCompile Include="SkipList.cpp" />
     <ActorCompiler Include="WaitFailure.actor.cpp" />
     <ActorCompiler Include="tester.actor.cpp" />

fdbserver/worker.actor.cpp

@@ -309,7 +309,7 @@ TLogFn tLogFnForOptions( TLogOptions options ) {
 			ASSERT(false);
 		case TLogVersion::V3:
 		case TLogVersion::V4:
-			return tLog;
+			return oldTLog_6_2::tLog;
 		default:
 			ASSERT(false);
 		}