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)
}
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
}
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)
}
