示例#1
0
// mkdirWithACL creates a new directory. If there is an error, it will be of
// type *PathError. .
//
// This is a modified and combined version of os.Mkdir and syscall.Mkdir
// in golang to cater for creating a directory am ACL permitting full
// access, with inheritance, to any subfolder/file for Built-in Administrators
// and Local System.
func mkdirWithACL(name string) error {
	sa := syscall.SecurityAttributes{Length: 0}
	sddl := "D:P(A;OICI;GA;;;BA)(A;OICI;GA;;;SY)"
	sd, err := winio.SddlToSecurityDescriptor(sddl)
	if err != nil {
		return &os.PathError{"mkdir", name, err}
	}
	sa.Length = uint32(unsafe.Sizeof(sa))
	sa.InheritHandle = 1
	sa.SecurityDescriptor = uintptr(unsafe.Pointer(&sd[0]))

	namep, err := syscall.UTF16PtrFromString(name)
	if err != nil {
		return &os.PathError{"mkdir", name, err}
	}

	e := syscall.CreateDirectory(namep, &sa)
	if e != nil {
		return &os.PathError{"mkdir", name, e}
	}
	return nil
}
示例#2
0
func (d *Driver) create(id, parent, mountLabel string, readOnly bool, storageOpt map[string]string) error {
	if len(storageOpt) != 0 {
		return fmt.Errorf("--storage-opt is not supported for windows")
	}

	rPId, err := d.resolveID(parent)
	if err != nil {
		return err
	}

	parentChain, err := d.getLayerChain(rPId)
	if err != nil {
		return err
	}

	var layerChain []string

	if rPId != "" {
		parentPath, err := hcsshim.GetLayerMountPath(d.info, rPId)
		if err != nil {
			return err
		}
		if _, err := os.Stat(filepath.Join(parentPath, "Files")); err == nil {
			// This is a legitimate parent layer (not the empty "-init" layer),
			// so include it in the layer chain.
			layerChain = []string{parentPath}
		}
	}

	layerChain = append(layerChain, parentChain...)

	if readOnly {
		if err := hcsshim.CreateLayer(d.info, id, rPId); err != nil {
			return err
		}
	} else {
		var parentPath string
		if len(layerChain) != 0 {
			parentPath = layerChain[0]
		}

		if isTP5OrOlder() {
			// Pre-create the layer directory, providing an ACL to give the Hyper-V Virtual Machines
			// group access. This is necessary to ensure that Hyper-V containers can access the
			// virtual machine data. This is not necessary post-TP5.
			path, err := syscall.UTF16FromString(filepath.Join(d.info.HomeDir, id))
			if err != nil {
				return err
			}
			// Give system and administrators full control, and VMs read, write, and execute.
			// Mark these ACEs as inherited.
			sd, err := winio.SddlToSecurityDescriptor("D:(A;OICI;FA;;;SY)(A;OICI;FA;;;BA)(A;OICI;FRFWFX;;;S-1-5-83-0)")
			if err != nil {
				return err
			}
			err = syscall.CreateDirectory(&path[0], &syscall.SecurityAttributes{
				Length:             uint32(unsafe.Sizeof(syscall.SecurityAttributes{})),
				SecurityDescriptor: uintptr(unsafe.Pointer(&sd[0])),
			})
			if err != nil {
				return err
			}
		}

		if err := hcsshim.CreateSandboxLayer(d.info, id, parentPath, layerChain); err != nil {
			return err
		}
	}

	if _, err := os.Lstat(d.dir(parent)); err != nil {
		if err2 := hcsshim.DestroyLayer(d.info, id); err2 != nil {
			logrus.Warnf("Failed to DestroyLayer %s: %s", id, err2)
		}
		return fmt.Errorf("Cannot create layer with missing parent %s: %s", parent, err)
	}

	if err := d.setLayerChain(id, layerChain); err != nil {
		if err2 := hcsshim.DestroyLayer(d.info, id); err2 != nil {
			logrus.Warnf("Failed to DestroyLayer %s: %s", id, err2)
		}
		return err
	}

	return nil
}