Function UnmountRecursive

core/mount/mount_unix.go:33–74

UnmountRecursive unmounts the target and all mounts underneath, starting with the deepest mount first.

(target string, flags int)

// UnmountRecursive unmounts the target and all mounts underneath, starting
// with the deepest mount first.
func UnmountRecursive(target string, flags int) error {
	if target == "" {
		return nil
	}

	target, err := CanonicalizePath(target)
	if err != nil {
		if os.IsNotExist(err) {
			err = nil
		}
		return err
	}

	mounts, err := mountinfo.GetMounts(mountinfo.PrefixFilter(target))
	if err != nil {
		return err
	}

	targetSet := make(map[string]struct{})
	for _, m := range mounts {
		targetSet[m.Mountpoint] = struct{}{}
	}

	var targets []string
	for m := range targetSet {
		targets = append(targets, m)
	}

	// Make the deepest mount be first
	sort.SliceStable(targets, func(i, j int) bool {
		return len(targets[i]) > len(targets[j])
	})

	for i, target := range targets {
		if err := UnmountAll(target, flags); err != nil {
			if i == len(targets)-1 { // last mount
				return err
			}
		}
	}
	return nil
}

func unmount(target string, flags int) error {
	if isFUSE(target) {