les: remove delayed les server starting

eth/backend.go

@@ -105,7 +105,6 @@ type Config struct {
 
 type LesServer interface {
 	Start(srvr *p2p.Server)
-	Synced()
 	Stop()
 	Protocols() []p2p.Protocol
 }

eth/handler.go

@@ -173,7 +173,7 @@ func NewProtocolManager(config *params.ChainConfig, fastSync bool, networkId int
 		return blockchain.CurrentBlock().NumberU64()
 	}
 	inserter := func(blocks types.Blocks) (int, error) {
-		manager.setSynced() // Mark initial sync done on any fetcher import
+		atomic.StoreUint32(&manager.synced, 1) // Mark initial sync done on any fetcher import
 		return manager.insertChain(blocks)
 	}
 	manager.fetcher = fetcher.New(blockchain.GetBlockByHash, validator, manager.BroadcastBlock, heighter, inserter, manager.removePeer)

eth/sync.go

@@ -181,7 +181,7 @@ func (pm *ProtocolManager) synchronise(peer *peer) {
 	if err := pm.downloader.Synchronise(peer.id, pHead, pTd, mode); err != nil {
 		return
 	}
-	pm.setSynced() // Mark initial sync done
+	atomic.StoreUint32(&pm.synced, 1) // Mark initial sync done
 
 	// If fast sync was enabled, and we synced up, disable it
 	if atomic.LoadUint32(&pm.fastSync) == 1 {
@@ -192,10 +192,3 @@ func (pm *ProtocolManager) synchronise(peer *peer) {
 		}
 	}
 }
-
-// setSynced sets the synced flag and notifies the light server if present
-func (pm *ProtocolManager) setSynced() {
-	if atomic.SwapUint32(&pm.synced, 1) == 0 && pm.lesServer != nil {
-		pm.lesServer.Synced()
-	}
-}

les/server.go

@@ -42,9 +42,7 @@ type LesServer struct {
 	fcManager       *flowcontrol.ClientManager // nil if our node is client only
 	fcCostStats     *requestCostStats
 	defParams       *flowcontrol.ServerParams
-	srvr            *p2p.Server
+	stopped         bool
-	synced, stopped bool
-	lock            sync.Mutex
 }
 
 func NewLesServer(eth *eth.Ethereum, config *eth.Config) (*LesServer, error) {
@@ -70,35 +68,13 @@ func (s *LesServer) Protocols() []p2p.Protocol {
 	return s.protocolManager.SubProtocols
 }
 
-// Start only starts the actual service if the ETH protocol has already been synced,
+// Start starts the LES server
-// otherwise it will be started by Synced()
 func (s *LesServer) Start(srvr *p2p.Server) {
-	s.lock.Lock()
+	s.protocolManager.Start(srvr)
-	defer s.lock.Unlock()
-
-	s.srvr = srvr
-	if s.synced {
-		s.protocolManager.Start(s.srvr)
-	}
-}
-
-// Synced notifies the server that the ETH protocol has been synced and LES service can be started
-func (s *LesServer) Synced() {
-	s.lock.Lock()
-	defer s.lock.Unlock()
-
-	s.synced = true
-	if s.srvr != nil && !s.stopped {
-		s.protocolManager.Start(s.srvr)
-	}
 }
 
 // Stop stops the LES service
 func (s *LesServer) Stop() {
-	s.lock.Lock()
-	defer s.lock.Unlock()
-
-	s.stopped = true
 	s.fcCostStats.store()
 	s.fcManager.Stop()
 	go func() {