discovery+graph: track job set dependencies in vb

discovery/gossiper.go

@@ -517,6 +517,9 @@ type AuthenticatedGossiper struct {
 	// AuthenticatedGossiper lock.
 	chanUpdateRateLimiter map[uint64][2]*rate.Limiter
 
+	// vb is used to enforce job dependency ordering of gossip messages.
+	vb *ValidationBarrier
+
 	sync.Mutex
 }
 
@@ -542,6 +545,8 @@ func New(cfg Config, selfKeyDesc *keychain.KeyDescriptor) *AuthenticatedGossiper
 		banman:                newBanman(),
 	}
 
+	gossiper.vb = NewValidationBarrier(1000, gossiper.quit)
+
 	gossiper.syncMgr = newSyncManager(&SyncManagerCfg{
 		ChainHash:               cfg.ChainHash,
 		ChanSeries:              cfg.ChanSeries,
@@ -1409,10 +1414,6 @@ func (d *AuthenticatedGossiper) networkHandler() {
 		log.Errorf("Unable to rebroadcast stale announcements: %v", err)
 	}
 
-	// We'll use this validation to ensure that we process jobs in their
-	// dependency order during parallel validation.
-	validationBarrier := graph.NewValidationBarrier(1000, d.quit)
-
 	for {
 		select {
 		// A new policy update has arrived. We'll commit it to the
@@ -1481,11 +1482,17 @@ func (d *AuthenticatedGossiper) networkHandler() {
 			// We'll set up any dependent, and wait until a free
 			// slot for this job opens up, this allow us to not
 			// have thousands of goroutines active.
-			validationBarrier.InitJobDependencies(announcement.msg)
+			annJobID, err := d.vb.InitJobDependencies(
+				announcement.msg,
+			)
+			if err != nil {
+				announcement.err <- err
+				continue
+			}
 
 			d.wg.Add(1)
 			go d.handleNetworkMessages(
-				announcement, &announcements, validationBarrier,
+				announcement, &announcements, annJobID,
 			)
 
 		// The trickle timer has ticked, which indicates we should
@@ -1536,28 +1543,23 @@ func (d *AuthenticatedGossiper) networkHandler() {
 //
 // NOTE: must be run as a goroutine.
 func (d *AuthenticatedGossiper) handleNetworkMessages(nMsg *networkMsg,
-	deDuped *deDupedAnnouncements, vb *graph.ValidationBarrier) {
+	deDuped *deDupedAnnouncements, jobID JobID) {
 
 	defer d.wg.Done()
-	defer vb.CompleteJob()
+	defer d.vb.CompleteJob()
 
 	// We should only broadcast this message forward if it originated from
 	// us or it wasn't received as part of our initial historical sync.
 	shouldBroadcast := !nMsg.isRemote || d.syncMgr.IsGraphSynced()
 
 	// If this message has an existing dependency, then we'll wait until
 	// that has been fully validated before we proceed.
-	err := vb.WaitForDependants(nMsg.msg)
+	err := d.vb.WaitForParents(jobID, nMsg.msg)
 	if err != nil {
 		log.Debugf("Validating network message %s got err: %v",
 			nMsg.msg.MsgType(), err)
 
-		if !graph.IsError(
-			err,
-			graph.ErrVBarrierShuttingDown,
-			graph.ErrParentValidationFailed,
-		) {
-
+		if errors.Is(err, ErrVBarrierShuttingDown) {
 			log.Warnf("unexpected error during validation "+
 				"barrier shutdown: %v", err)
 		}
@@ -1577,7 +1579,16 @@ func (d *AuthenticatedGossiper) handleNetworkMessages(nMsg *networkMsg,
 
 	// If this message had any dependencies, then we can now signal them to
 	// continue.
-	vb.SignalDependants(nMsg.msg, allow)
+	err = d.vb.SignalDependents(nMsg.msg, jobID)
+	if err != nil {
+		// Something is wrong if SignalDependents returns an error.
+		log.Errorf("SignalDependents returned error for msg=%v with "+
+			"JobID=%v", spew.Sdump(nMsg.msg), jobID)
+
+		nMsg.err <- err
+
+		return
+	}
 
 	// If the announcement was accepted, then add the emitted announcements
 	// to our announce batch to be broadcast once the trickle timer ticks
@@ -2407,7 +2418,6 @@ func (d *AuthenticatedGossiper) handleNodeAnnouncement(nMsg *networkMsg,
 			err,
 			graph.ErrOutdated,
 			graph.ErrIgnored,
-			graph.ErrVBarrierShuttingDown,
 		) {
 
 			log.Error(err)
@@ -3148,7 +3158,6 @@ func (d *AuthenticatedGossiper) handleChanUpdate(nMsg *networkMsg,
 		if graph.IsError(
 			err, graph.ErrOutdated,
 			graph.ErrIgnored,
-			graph.ErrVBarrierShuttingDown,
 		) {
 
 			log.Debugf("Update edge for short_chan_id(%v) got: %v",