refacotring

weed/remote_storage/mount_mapping.go

@@ -5,6 +5,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/filer"
 	"github.com/chrislusf/seaweedfs/weed/pb"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/golang/protobuf/proto"
 	"google.golang.org/grpc"
 )
 
@@ -24,3 +25,22 @@ func ReadMountMappings(grpcDialOption grpc.DialOption, filerAddress string) (map
 
 	return
 }
+
+func ReadRemoteStorageConf(grpcDialOption grpc.DialOption, filerAddress string, storageName string) (conf *filer_pb.RemoteConf, readErr error) {
+	var oldContent []byte
+	if readErr = pb.WithFilerClient(filerAddress, grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
+		oldContent, readErr = filer.ReadInsideFiler(client, filer.DirectoryEtcRemote, storageName+filer.REMOTE_STORAGE_CONF_SUFFIX)
+		return readErr
+	}); readErr != nil {
+		return nil, readErr
+	}
+
+	// unmarshal storage configuration
+	conf = &filer_pb.RemoteConf{}
+	if unMarshalErr := proto.Unmarshal(oldContent, conf); unMarshalErr != nil {
+		readErr = fmt.Errorf("unmarshal %s/%s: %v", filer.DirectoryEtcRemote, storageName+filer.REMOTE_STORAGE_CONF_SUFFIX, unMarshalErr)
+		return
+	}
+
+	return
+}