func getRequestCapacity()

in pkg/csi_driver/controller.go [273:314]
30 lines of code
11 McCabe index (conditional complexity)

func getRequestCapacity(capRange *csi.CapacityRange) (int64, error) {
	var capBytes int64
	// Default case where nothing is set
	if capRange == nil {
		capBytes = MinVolumeSizeBytes

		return capBytes, nil
	}

	rBytes := capRange.GetRequiredBytes()
	rSet := rBytes > 0
	lBytes := capRange.GetLimitBytes()
	lSet := lBytes > 0

	if lSet && rSet && lBytes < rBytes {
		return 0, fmt.Errorf("limit bytes %v is less than required bytes %v", lBytes, rBytes)
	}
	if lSet && lBytes < MinVolumeSizeBytes {
		return 0, fmt.Errorf("limit bytes %v is less than minimum volume size: %v", lBytes, MinVolumeSizeBytes)
	}

	// If Required set just set capacity to that which is Required
	if rSet {
		capBytes = rBytes
	}

	// Lustre supports a 1 TiB thin instance for testing purposes.
	// A thin instance will be created only when the capacity is set exactly to 1 TiB.
	if capBytes == thinInstanceSizeBytyes {
		return capBytes, nil
	}

	// Too large or too small.
	if capBytes < MinVolumeSizeBytes {
		capBytes = MinVolumeSizeBytes
	}
	if capBytes > MaxVolumeSizeBytes {
		capBytes = MaxVolumeSizeBytes
	}

	return capBytes, nil
}