From c9ed379e39be94b588f4b62f893760c53b2d2a4f Mon Sep 17 00:00:00 2001
From: Perttu Ahola <celeron55@gmail.com>
Date: Sat, 28 Jul 2012 03:08:09 +0300
Subject: [PATCH] Add enable_rollback_recording setting, defaulting to false

---
 minetest.conf.example   | 2 ++
 src/defaultsettings.cpp | 1 +
 src/server.cpp          | 7 +++++++
 src/server.h            | 1 +
 4 files changed, 11 insertions(+)

diff --git a/minetest.conf.example b/minetest.conf.example
index fdfbf201c..adeb3c8f6 100644
--- a/minetest.conf.example
+++ b/minetest.conf.example
@@ -160,6 +160,8 @@
 #disallow_empty_password = false
 # If true, disable cheat prevention in multiplayer
 #disable_anticheat = false
+# If true, actions are recorded for rollback
+#enable_rollback_recording = false
 
 # Profiler data print interval. #0 = disable.
 #profiler_print_interval = 0
diff --git a/src/defaultsettings.cpp b/src/defaultsettings.cpp
index dabdbb4aa..6b85feb60 100644
--- a/src/defaultsettings.cpp
+++ b/src/defaultsettings.cpp
@@ -122,6 +122,7 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("enable_pvp", "true");
 	settings->setDefault("disallow_empty_password", "false");
 	settings->setDefault("disable_anticheat", "false");
+	settings->setDefault("enable_rollback_recording", "false");
 
 	settings->setDefault("profiler_print_interval", "0");
 	settings->setDefault("enable_mapgen_debug_info", "false");
diff --git a/src/server.cpp b/src/server.cpp
index 6a126b60d..05dff06c5 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -937,6 +937,7 @@ Server::Server(
 	m_banmanager(path_world+DIR_DELIM+"ipban.txt"),
 	m_rollback(NULL),
 	m_rollback_sink_enabled(true),
+	m_enable_rollback_recording(false),
 	m_lua(NULL),
 	m_itemdef(createItemDefManager()),
 	m_nodedef(createNodeDefManager()),
@@ -1873,6 +1874,10 @@ void Server::AsyncRunStep()
 			counter = 0.0;
 			
 			m_emergethread.trigger();
+
+			// Update m_enable_rollback_recording here too
+			m_enable_rollback_recording =
+					g_settings->getBool("enable_rollback_recording");
 		}
 	}
 
@@ -4658,6 +4663,8 @@ MtEventManager* Server::getEventManager()
 }
 IRollbackReportSink* Server::getRollbackReportSink()
 {
+	if(!m_enable_rollback_recording)
+		return NULL;
 	if(!m_rollback_sink_enabled)
 		return NULL;
 	return m_rollback;
diff --git a/src/server.h b/src/server.h
index 668d42416..223c1b0ff 100644
--- a/src/server.h
+++ b/src/server.h
@@ -734,6 +734,7 @@ private:
 	// Rollback manager (behind m_env_mutex)
 	IRollbackManager *m_rollback;
 	bool m_rollback_sink_enabled;
+	bool m_enable_rollback_recording; // Updated once in a while
 
 	// Scripting
 	// Envlock and conlock should be locked when using Lua