type DeleteVersionHandlerParams struct {
	DiskID         string        `msg:"id"`
	Volume         string        `msg:"v"`
	FilePath       string        `msg:"fp"`
	ForceDelMarker bool          `msg:"fdm"`
	Opts           DeleteOptions `msg:"do"`
	FI             FileInfo      `msg:"fi"`
}

// MetadataHandlerParams is request info for UpdateMetadataHandle and WriteMetadataHandler.
type MetadataHandlerParams struct {