7 files changed, 24 insertions, 32 deletions
diff --git a/unmaintained/load_test/load_test_meta_tail/load_test_meta_tail.go b/unmaintained/load_test/load_test_meta_tail/load_test_meta_tail.go
index c521ce33e..b89e8de51 100644
--- a/unmaintained/load_test/load_test_meta_tail/load_test_meta_tail.go
+++ b/unmaintained/load_test/load_test_meta_tail/load_test_meta_tail.go
@@ -72,8 +72,7 @@ func startGenerateMetadata() {
 
 func startSubscribeMetadata(eachEntryFunc func(event *filer_pb.SubscribeMetadataResponse) error) {
 
-	tailErr := pb.FollowMetadata(*tailFiler, grpc.WithInsecure(),	"tail",
-		*dir, 0, 0, eachEntryFunc, false)
+	tailErr := pb.FollowMetadata(*tailFiler, grpc.WithInsecure(), "tail", *dir, nil, 0, 0, eachEntryFunc, false)
 
 	if tailErr != nil {
 		fmt.Printf("tail %s: %v\n", *tailFiler, tailErr)
diff --git a/weed/command/filer_backup.go b/weed/command/filer_backup.go
index 0c450181b..f0a4bd79b 100644
--- a/weed/command/filer_backup.go
+++ b/weed/command/filer_backup.go
@@ -112,7 +112,6 @@ func doFilerBackup(grpcDialOption grpc.DialOption, backupOption *FilerBackupOpti
 		return setOffset(grpcDialOption, sourceFiler, BackupKeyPrefix, int32(sinkId), lastTsNs)
 	})
 
-	return pb.FollowMetadata(sourceFiler, grpcDialOption, "backup_"+dataSink.GetName(),
-		sourcePath, startFrom.UnixNano(), 0, processEventFnWithOffset, false)
+	return pb.FollowMetadata(sourceFiler, grpcDialOption, "backup_"+dataSink.GetName(), sourcePath, nil, startFrom.UnixNano(), 0, processEventFnWithOffset, false)
 
 }
diff --git a/weed/command/filer_meta_backup.go b/weed/command/filer_meta_backup.go
index 6fe323fba..ebc39beb1 100644
--- a/weed/command/filer_meta_backup.go
+++ b/weed/command/filer_meta_backup.go
@@ -195,8 +195,7 @@ func (metaBackup *FilerMetaBackupOptions) streamMetadataBackup() error {
 		return metaBackup.setOffset(lastTime)
 	})
 
-	return pb.FollowMetadata(*metaBackup.filerAddress, metaBackup.grpcDialOption, "meta_backup",
-		*metaBackup.filerDirectory, startTime.UnixNano(), 0, processEventFnWithOffset, false)
+	return pb.FollowMetadata(*metaBackup.filerAddress, metaBackup.grpcDialOption, "meta_backup", *metaBackup.filerDirectory, nil, startTime.UnixNano(), 0, processEventFnWithOffset, false)
 
 }
 
diff --git a/weed/command/filer_meta_tail.go b/weed/command/filer_meta_tail.go
index 28c0db99b..3b30e2b6a 100644
--- a/weed/command/filer_meta_tail.go
+++ b/weed/command/filer_meta_tail.go
@@ -103,17 +103,15 @@ func runFilerMetaTail(cmd *Command, args []string) bool {
 		}
 	}
 
-	tailErr := pb.FollowMetadata(*tailFiler, grpcDialOption, "tail",
-		*tailTarget, time.Now().Add(-*tailStart).UnixNano(), 0,
-		func(resp *filer_pb.SubscribeMetadataResponse) error {
-			if !shouldPrint(resp) {
-				return nil
-			}
-			if err := eachEntryFunc(resp); err != nil {
-				return err
-			}
+	tailErr := pb.FollowMetadata(*tailFiler, grpcDialOption, "tail", *tailTarget, nil, time.Now().Add(-*tailStart).UnixNano(), 0, func(resp *filer_pb.SubscribeMetadataResponse) error {
+		if !shouldPrint(resp) {
 			return nil
-		}, false)
+		}
+		if err := eachEntryFunc(resp); err != nil {
+			return err
+		}
+		return nil
+	}, false)
 
 	if tailErr != nil {
 		fmt.Printf("tail %s: %v\n", *tailFiler, tailErr)
diff --git a/weed/command/filer_remote_sync.go b/weed/command/filer_remote_sync.go
index 8d2719660..fd6ed23b9 100644
--- a/weed/command/filer_remote_sync.go
+++ b/weed/command/filer_remote_sync.go
@@ -210,8 +210,7 @@ func followUpdatesAndUploadToRemote(option *RemoteSyncOptions, filerSource *sour
 		return setOffset(option.grpcDialOption, *option.filerAddress, RemoteSyncKeyPrefix, int32(dirHash), lastTsNs)
 	})
 
-	return pb.FollowMetadata(*option.filerAddress, option.grpcDialOption,
-		"filer.remote.sync", mountedDir, lastOffsetTs.UnixNano(), 0, processEventFnWithOffset, false)
+	return pb.FollowMetadata(*option.filerAddress, option.grpcDialOption, "filer.remote.sync", mountedDir, nil, lastOffsetTs.UnixNano(), 0, processEventFnWithOffset, false)
 }
 
 func toRemoteStorageLocation(mountDir, sourcePath util.FullPath, remoteMountLocation *remote_pb.RemoteStorageLocation) *remote_pb.RemoteStorageLocation {
diff --git a/weed/command/filer_sync.go b/weed/command/filer_sync.go
index 5440811dd..4ebb87f71 100644
--- a/weed/command/filer_sync.go
+++ b/weed/command/filer_sync.go
@@ -170,8 +170,7 @@ func doSubscribeFilerMetaChanges(grpcDialOption grpc.DialOption, sourceFiler, so
 		return setOffset(grpcDialOption, targetFiler, SyncKeyPrefix, sourceFilerSignature, lastTsNs)
 	})
 
-	return pb.FollowMetadata(sourceFiler, grpcDialOption, "syncTo_"+targetFiler,
-		sourcePath, sourceFilerOffsetTsNs, targetFilerSignature, processEventFnWithOffset, false)
+	return pb.FollowMetadata(sourceFiler, grpcDialOption, "syncTo_"+targetFiler, sourcePath, nil, sourceFilerOffsetTsNs, targetFilerSignature, processEventFnWithOffset, false)
 
 }
 
diff --git a/weed/pb/filer_pb_tail.go b/weed/pb/filer_pb_tail.go
index 31fb62fb3..63900081c 100644
--- a/weed/pb/filer_pb_tail.go
+++ b/weed/pb/filer_pb_tail.go
@@ -12,12 +12,12 @@ import (
 
 type ProcessMetadataFunc func(resp *filer_pb.SubscribeMetadataResponse) error
 
-func FollowMetadata(filerAddress string, grpcDialOption grpc.DialOption,
-	clientName string, pathPrefix string, lastTsNs int64, selfSignature int32,
+func FollowMetadata(filerAddress string, grpcDialOption grpc.DialOption, clientName string,
+	pathPrefix string, additionalPathPrefixes []string, lastTsNs int64, selfSignature int32,
 	processEventFn ProcessMetadataFunc, fatalOnError bool) error {
 
-	err := WithFilerClient(filerAddress, grpcDialOption, makeFunc(
-		clientName, pathPrefix, lastTsNs, selfSignature, processEventFn, fatalOnError))
+	err := WithFilerClient(filerAddress, grpcDialOption, makeFunc(clientName,
+		pathPrefix, additionalPathPrefixes, lastTsNs, selfSignature, processEventFn, fatalOnError))
 	if err != nil {
 		return fmt.Errorf("subscribing filer meta change: %v", err)
 	}
@@ -28,8 +28,7 @@ func WithFilerClientFollowMetadata(filerClient filer_pb.FilerClient,
 	clientName string, pathPrefix string, lastTsNs int64, selfSignature int32,
 	processEventFn ProcessMetadataFunc, fatalOnError bool) error {
 
-	err := filerClient.WithFilerClient(makeFunc(
-		clientName, pathPrefix, lastTsNs, selfSignature, processEventFn, fatalOnError))
+	err := filerClient.WithFilerClient(makeFunc(clientName, pathPrefix, nil, lastTsNs, selfSignature, processEventFn, fatalOnError))
 	if err != nil {
 		return fmt.Errorf("subscribing filer meta change: %v", err)
 	}
@@ -37,16 +36,16 @@ func WithFilerClientFollowMetadata(filerClient filer_pb.FilerClient,
 	return nil
 }
 
-func makeFunc(clientName string, pathPrefix string, lastTsNs int64, selfSignature int32,
-	processEventFn ProcessMetadataFunc, fatalOnError bool) func(client filer_pb.SeaweedFilerClient) error {
+func makeFunc(clientName string, pathPrefix string, additionalPathPrefixes []string, lastTsNs int64, selfSignature int32, processEventFn ProcessMetadataFunc, fatalOnError bool) func(client filer_pb.SeaweedFilerClient) error {
 	return func(client filer_pb.SeaweedFilerClient) error {
 		ctx, cancel := context.WithCancel(context.Background())
 		defer cancel()
 		stream, err := client.SubscribeMetadata(ctx, &filer_pb.SubscribeMetadataRequest{
-			ClientName: clientName,
-			PathPrefix: pathPrefix,
-			SinceNs:    lastTsNs,
-			Signature:  selfSignature,
+			ClientName:   clientName,
+			PathPrefix:   pathPrefix,
+			PathPrefixes: additionalPathPrefixes,
+			SinceNs:      lastTsNs,
+			Signature:    selfSignature,
 		})
 		if err != nil {
 			return fmt.Errorf("subscribe: %v", err)