func getDevicesFromPath(deviceMapping containertypes.DeviceMapping) (devs []specs.Device, devPermissions []specs.DeviceCgroup, err error) {
	resolvedPathOnHost := deviceMapping.PathOnHost

	// check if it is a symbolic link
	if src, e := os.Lstat(deviceMapping.PathOnHost); e == nil && src.Mode()&os.ModeSymlink == os.ModeSymlink {
		if linkedPathOnHost, e := filepath.EvalSymlinks(deviceMapping.PathOnHost); e == nil {
			resolvedPathOnHost = linkedPathOnHost
		}
	}

	device, err := devices.DeviceFromPath(resolvedPathOnHost, deviceMapping.CgroupPermissions)
	// if there was no error, return the device
	if err == nil {
		device.Path = deviceMapping.PathInContainer
		return append(devs, specDevice(device)), append(devPermissions, specDeviceCgroup(device)), nil
	}

	// if the device is not a device node
	// try to see if it's a directory holding many devices
	if err == devices.ErrNotADevice {

		// check if it is a directory
		if src, e := os.Stat(resolvedPathOnHost); e == nil && src.IsDir() {

			// mount the internal devices recursively
			filepath.Walk(resolvedPathOnHost, func(dpath string, f os.FileInfo, e error) error {
				childDevice, e := devices.DeviceFromPath(dpath, deviceMapping.CgroupPermissions)
				if e != nil {
					// ignore the device
					return nil
				}

				// add the device to userSpecified devices
				childDevice.Path = strings.Replace(dpath, resolvedPathOnHost, deviceMapping.PathInContainer, 1)
				devs = append(devs, specDevice(childDevice))
				devPermissions = append(devPermissions, specDeviceCgroup(childDevice))

				return nil
			})
		}
	}

	if len(devs) > 0 {
		return devs, devPermissions, nil
	}

	return devs, devPermissions, fmt.Errorf("error gathering device information while adding custom device %q: %s", deviceMapping.PathOnHost, err)
}
Beispiel #2
0
func createDevices(spec *LinuxSpec, config *configs.Config) error {
	for _, name := range spec.Devices {
		d, err := devices.DeviceFromPath(filepath.Join("/dev", name), "rwm")
		if err != nil {
			return err
		}
		config.Devices = append(config.Devices, d)
	}
	return nil
}
Beispiel #3
0
func getDevicesFromPath(deviceMapping runconfig.DeviceMapping) (devs []*configs.Device, err error) {
	device, err := devices.DeviceFromPath(deviceMapping.PathOnHost, deviceMapping.CgroupPermissions)
	// if there was no error, return the device
	if err == nil {
		device.Path = deviceMapping.PathInContainer
		return append(devs, device), nil
	}

	// if the device is not a device node
	// try to see if it's a directory holding many devices
	if err == devices.ErrNotADevice {

		// check if it is a directory
		if src, e := os.Stat(deviceMapping.PathOnHost); e == nil && src.IsDir() {

			// mount the internal devices recursively
			filepath.Walk(deviceMapping.PathOnHost, func(dpath string, f os.FileInfo, e error) error {
				childDevice, e := devices.DeviceFromPath(dpath, deviceMapping.CgroupPermissions)
				if e != nil {
					// ignore the device
					return nil
				}

				// add the device to userSpecified devices
				childDevice.Path = strings.Replace(dpath, deviceMapping.PathOnHost, deviceMapping.PathInContainer, 1)
				devs = append(devs, childDevice)

				return nil
			})
		}
	}

	if len(devs) > 0 {
		return devs, nil
	}

	return devs, derr.ErrorCodeDeviceInfo.WithArgs(deviceMapping.PathOnHost, err)
}