示例#1
0
文件: macvlan.go 项目: aanm/cni
func createMacvlan(conf *NetConf, ifName string, netns *os.File) error {
	mode, err := modeFromString(conf.Mode)
	if err != nil {
		return err
	}

	m, err := netlink.LinkByName(conf.Master)
	if err != nil {
		return fmt.Errorf("failed to lookup master %q: %v", conf.Master, err)
	}

	// due to kernel bug we have to create with tmpName or it might
	// collide with the name on the host and error out
	tmpName, err := ip.RandomVethName()
	if err != nil {
		return err
	}

	mv := &netlink.Macvlan{
		LinkAttrs: netlink.LinkAttrs{
			MTU:         conf.MTU,
			Name:        tmpName,
			ParentIndex: m.Attrs().Index,
			Namespace:   netlink.NsFd(int(netns.Fd())),
		},
		Mode: mode,
	}

	if err := netlink.LinkAdd(mv); err != nil {
		return fmt.Errorf("failed to create macvlan: %v", err)
	}

	// TODO: duplicate following lines for ipv6 support, when it will be added in other places
	ipv4SysctlValueName := fmt.Sprintf(IPv4InterfaceArpProxySysctlTemplate, tmpName)
	if _, err := sysctl.Sysctl(ipv4SysctlValueName, "1"); err != nil {
		// remove the newly added link and ignore errors, because we already are in a failed state
		_ = netlink.LinkDel(mv)
		return fmt.Errorf("failed to set proxy_arp on newly added interface %q: %v", tmpName, err)
	}

	return ns.WithNetNS(netns, false, func(_ *os.File) error {
		err := renameLink(tmpName, ifName)
		if err != nil {
			return fmt.Errorf("failed to rename macvlan to %q: %v", ifName, err)
		}
		return nil
	})
}
示例#2
0
文件: macvlan.go 项目: NeilW/cni
func createMacvlan(conf *NetConf, ifName string, netns *os.File) error {
	mode, err := modeFromString(conf.Mode)
	if err != nil {
		return err
	}

	m, err := netlink.LinkByName(conf.Master)
	if err != nil {
		return fmt.Errorf("failed to lookup master %q: %v", conf.Master, err)
	}

	// due to kernel bug we have to create with tmpname or it might
	// collide with the name on the host and error out
	tmpName, err := ip.RandomVethName()
	if err != nil {
		return err
	}

	mv := &netlink.Macvlan{
		LinkAttrs: netlink.LinkAttrs{
			MTU:         conf.MTU,
			Name:        tmpName,
			ParentIndex: m.Attrs().Index,
			Namespace:   netlink.NsFd(int(netns.Fd())),
		},
		Mode: mode,
	}

	if err := netlink.LinkAdd(mv); err != nil {
		return fmt.Errorf("failed to create macvlan: %v", err)
	}

	return ns.WithNetNS(netns, false, func(_ *os.File) error {
		err := renameLink(tmpName, ifName)
		if err != nil {
			return fmt.Errorf("failed to rename macvlan to %q: %v", ifName, err)
		}
		return nil
	})
}