filer: fs.configure should try to read from entry.content also

related to https://github.com/chrislusf/seaweedfs/issues/1792

weed/filer/filer_conf.go

@@ -46,17 +46,19 @@ func (fc *FilerConf) loadFromFiler(filer *Filer) (err error) {
 		return fc.LoadFromBytes(entry.Content)
 	}
 
-	return fc.loadFromChunks(filer, entry.Chunks)
+	return fc.loadFromChunks(filer, entry.Content, entry.Chunks)
 }
 
-func (fc *FilerConf) loadFromChunks(filer *Filer, chunks []*filer_pb.FileChunk) (err error) {
-	data, err := filer.readEntry(chunks)
-	if err != nil {
-		glog.Errorf("read filer conf content: %v", err)
-		return
+func (fc *FilerConf) loadFromChunks(filer *Filer, content []byte, chunks []*filer_pb.FileChunk) (err error) {
+	if len(content) == 0 {
+		content, err = filer.readEntry(chunks)
+		if err != nil {
+			glog.Errorf("read filer conf content: %v", err)
+			return
+		}
 	}
 
-	return fc.LoadFromBytes(data)
+	return fc.LoadFromBytes(content)
 }
 
 func (fc *FilerConf) LoadFromBytes(data []byte) (err error) {

weed/filer/filer_on_meta_event.go

@@ -40,7 +40,7 @@ func (f *Filer) readEntry(chunks []*filer_pb.FileChunk) ([]byte, error) {
 
 func (f *Filer) reloadFilerConfiguration(entry *filer_pb.Entry) {
 	fc := NewFilerConf()
-	err := fc.loadFromChunks(f, entry.Chunks)
+	err := fc.loadFromChunks(f, entry.Content, entry.Chunks)
 	if err != nil {
 		glog.Errorf("read filer conf chunks: %v", err)
 		return