Function unmount

tests/dmflakey/dmflakey_test.go:173–188

(target string)

}

func unmount(target string) error {
	for i := 0; i < 50; i++ {
		if err := unix.Unmount(target, 0); err != nil {
			switch err {
			case unix.EBUSY:
				time.Sleep(500 * time.Millisecond)
				continue
			case unix.EINVAL:
			default:
				return fmt.Errorf("failed to umount %s: %w", target, err)
			}
		}
		return nil
	}
	return unix.EBUSY
}