// NewMacVlanLink creates macvlan network link // // It is equivalent of running: // ip link add name mc${RANDOM STRING} link ${master interface} type macvlan // NewMacVlanLink returns MacVlaner which is initialized to a pointer of type MacVlanLink if the // macvlan link was created successfully on the Linux host. Newly created link is assigned // a random name starting with "mc". It sets the macvlan mode to "bridge" mode which is a default. // It returns error if the link could not be created. func NewMacVlanLink(masterDev string) (MacVlaner, error) { macVlanDev := makeNetInterfaceName("mc") if ok, err := NetInterfaceNameValid(masterDev); !ok { return nil, err } if _, err := net.InterfaceByName(masterDev); err != nil { return nil, fmt.Errorf("Master MAC VLAN device %s does not exist on the host", masterDev) } if err := netlink.NetworkLinkAddMacVlan(masterDev, macVlanDev, default_mode); err != nil { return nil, err } macVlanIfc, err := net.InterfaceByName(macVlanDev) if err != nil { return nil, fmt.Errorf("Could not find the new interface: %s", err) } masterIfc, err := net.InterfaceByName(masterDev) if err != nil { return nil, fmt.Errorf("Could not find the new interface: %s", err) } return &MacVlanLink{ Link: Link{ ifc: macVlanIfc, }, masterIfc: masterIfc, mode: default_mode, }, nil }
// NewMacVlanLinkWithOptions creates macvlan network link and sets som of its network parameters // passed in as MacVlanOptions. // // It is equivalent of running: // ip link add name ${macvlan name} link ${master interface} address ${macaddress} type macvlan mode ${mode} // NewMacVlanLinkWithOptions returns MacVlaner which is initialized to a pointer of type MacVlanLink if the // macvlan link was created successfully on the Linux host. If particular option is empty, it sets default value if possible. // It returns error if the macvlan link could not be created or if incorrect options have been passed. func NewMacVlanLinkWithOptions(masterDev string, opts MacVlanOptions) (MacVlaner, error) { if ok, err := NetInterfaceNameValid(masterDev); !ok { return nil, err } if _, err := net.InterfaceByName(masterDev); err != nil { return nil, fmt.Errorf("Master MAC VLAN device %s does not exist on the host", masterDev) } if err := validateMacVlanOptions(&opts); err != nil { return nil, err } if err := netlink.NetworkLinkAddMacVlan(masterDev, opts.Dev, opts.Mode); err != nil { return nil, err } macVlanIfc, err := net.InterfaceByName(opts.Dev) if err != nil { return nil, fmt.Errorf("Could not find the new interface: %s", err) } if opts.MacAddr != "" { if err := netlink.NetworkSetMacAddress(macVlanIfc, opts.MacAddr); err != nil { if errDel := DeleteLink(macVlanIfc.Name); errDel != nil { return nil, fmt.Errorf("Incorrect options specified. Attempt to delete the link failed: %s", errDel) } } } masterIfc, err := net.InterfaceByName(masterDev) if err != nil { return nil, fmt.Errorf("Could not find the new interface: %s", err) } return &MacVlanLink{ Link: Link{ ifc: macVlanIfc, }, masterIfc: masterIfc, mode: opts.Mode, }, nil }