func (c *containerLXC) setNetworkPriority() error {
	// Check that the container is running
	if !c.IsRunning() {
		return fmt.Errorf("Can't set network priority on stopped container")
	}

	// Don't bother if the cgroup controller doesn't exist
	if !c.state.OS.CGroupNetPrioController {
		return nil
	}

	// Extract the current priority
	networkPriority := c.expandedConfig["limits.network.priority"]
	if networkPriority == "" {
		networkPriority = "0"
	}

	networkInt, err := strconv.Atoi(networkPriority)
	if err != nil {
		return err
	}

	// Get all the interfaces
	netifs, err := net.Interfaces()
	if err != nil {
		return err
	}

	// Check that we at least succeeded to set an entry
	success := false
	var last_error error
	for _, netif := range netifs {
		err = c.CGroupSet("net_prio.ifpriomap", fmt.Sprintf("%s %d", netif.Name, networkInt))
		if err == nil {
			success = true
		} else {
			last_error = err
		}
	}

	if !success {
		return fmt.Errorf("Failed to set network device priority: %s", last_error)
	}

	return nil
}
func (c *containerLXC) setNetworkPriority() error {
	// Check that the container is running
	if !c.IsRunning() {
		return fmt.Errorf("Can't set network priority on stopped container")
	}

	// Don't bother if the cgroup controller doesn't exist
	if !c.state.OS.CGroupNetPrioController {
		return nil
	}

	// Extract the current priority
	networkPriority := c.expandedConfig["limits.network.priority"]
	if networkPriority == "" {
		networkPriority = "0"
	}

	networkInt, err := strconv.Atoi(networkPriority)
	if err != nil {
		return err
	}

	// Get all the interfaces
	netifs, err := net.Interfaces()
	if err != nil {
		return err
	}

	// Check that we at least succeeded to set an entry
	success := false
	var last_error error
	for _, netif := range netifs {
		err = c.CGroupSet("net_prio.ifpriomap", fmt.Sprintf("%s %d", netif.Name, networkInt))
		if err == nil {
			success = true
		} else {
			last_error = err
		}
	}

	if !success {
		return fmt.Errorf("Failed to set network device priority: %s", last_error)
	}

	return nil
}
// Network I/O limits