kubernetes/pkg/volume/flexvolume/expander-defaults.go

type expanderDefaults …

func newExpanderDefaults(plugin *flexVolumePlugin) *expanderDefaults { … }

func (e *expanderDefaults) ExpandVolumeDevice(spec *volume.Spec, newSize resource.Quantity, oldSize resource.Quantity) (resource.Quantity, error) { … }

// the defaults for NodeExpand return a generic resize indicator that will trigger the operation executor to go ahead with
// generic filesystem resize
func (e *expanderDefaults) NodeExpand(rsOpt volume.NodeResizeOptions) (bool, error) { … }