Added VLAN and MAC VLAN device support to netlink
You can now create VLAN and MAC VLAN devices using netlink. I've also added tests for both VLAN and MAC VLAN stuff. Signed-off-by: Milos Gajdos <milosgajdos83@gmail.com> (github: milosgajdos83)
This commit is contained in:
Milos Gajdos
parent
267ba8f753
commit
d90daa0cf7
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@ -17,6 +17,8 @@ const (
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IFLA_INFO_KIND = 1
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IFLA_INFO_DATA = 2
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VETH_INFO_PEER = 1
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IFLA_MACVLAN_MODE = 1
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IFLA_VLAN_ID = 1
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IFLA_NET_NS_FD = 28
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IFLA_ADDRESS = 1
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SIOC_BRADDBR = 0x89a0
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@ -24,6 +26,13 @@ const (
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SIOC_BRADDIF = 0x89a2
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)
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const (
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MACVLAN_MODE_PRIVATE = 1 << iota
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MACVLAN_MODE_VEPA
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MACVLAN_MODE_BRIDGE
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MACVLAN_MODE_PASSTHRU
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)
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var nextSeqNr uint32
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type ifreqHwaddr struct {
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@ -702,6 +711,89 @@ func NetworkCreateVethPair(name1, name2 string) error {
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return s.HandleAck(wb.Seq)
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}
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// Add a new VLAN interface with masterDev as its upper device
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// This is identical to running:
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// ip link add name $name link $masterdev type vlan id $id
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func NetworkLinkAddVlan(masterDev, vlanDev string, vlanId uint16) error {
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s, err := getNetlinkSocket()
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if err != nil {
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return err
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}
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defer s.Close()
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wb := newNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK)
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masterDevIfc, err := net.InterfaceByName(masterDev)
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if err != nil {
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return err
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}
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msg := newIfInfomsg(syscall.AF_UNSPEC)
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wb.AddData(msg)
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nest1 := newRtAttr(syscall.IFLA_LINKINFO, nil)
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newRtAttrChild(nest1, IFLA_INFO_KIND, nonZeroTerminated("vlan"))
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nest2 := newRtAttrChild(nest1, IFLA_INFO_DATA, nil)
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vlanData := make([]byte, 2)
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native.PutUint16(vlanData, vlanId)
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newRtAttrChild(nest2, IFLA_VLAN_ID, vlanData)
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wb.AddData(nest1)
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wb.AddData(uint32Attr(syscall.IFLA_LINK, uint32(masterDevIfc.Index)))
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wb.AddData(newRtAttr(syscall.IFLA_IFNAME, zeroTerminated(vlanDev)))
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if err := s.Send(wb); err != nil {
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return err
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}
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return s.HandleAck(wb.Seq)
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}
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// Add MAC VLAN network interface with masterDev as its upper device
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// This is identical to running:
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// ip link add name $name link $masterdev type macvlan mode $mode
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func NetworkLinkAddMacVlan(masterDev, macVlanDev string, mode string) error {
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s, err := getNetlinkSocket()
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if err != nil {
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return err
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}
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defer s.Close()
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macVlan := map[string]uint32{
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"private": MACVLAN_MODE_PRIVATE,
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"vepa": MACVLAN_MODE_VEPA,
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"bridge": MACVLAN_MODE_BRIDGE,
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"passthru": MACVLAN_MODE_PASSTHRU,
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}
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wb := newNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK)
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masterDevIfc, err := net.InterfaceByName(masterDev)
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if err != nil {
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return err
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}
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msg := newIfInfomsg(syscall.AF_UNSPEC)
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wb.AddData(msg)
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nest1 := newRtAttr(syscall.IFLA_LINKINFO, nil)
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newRtAttrChild(nest1, IFLA_INFO_KIND, nonZeroTerminated("macvlan"))
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nest2 := newRtAttrChild(nest1, IFLA_INFO_DATA, nil)
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macVlanData := make([]byte, 4)
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native.PutUint32(macVlanData, macVlan[mode])
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newRtAttrChild(nest2, IFLA_MACVLAN_MODE, macVlanData)
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wb.AddData(nest1)
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wb.AddData(uint32Attr(syscall.IFLA_LINK, uint32(masterDevIfc.Index)))
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wb.AddData(newRtAttr(syscall.IFLA_IFNAME, zeroTerminated(macVlanDev)))
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if err := s.Send(wb); err != nil {
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return err
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}
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return s.HandleAck(wb.Seq)
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}
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func networkLinkIpAction(action, flags int, ifa IfAddr) error {
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s, err := getNetlinkSocket()
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if err != nil {
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@ -200,6 +200,54 @@ func TestNetworkChangeName(t *testing.T) {
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deleteLink(t, newName)
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}
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func TestNetworkLinkAddVlan(t *testing.T) {
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if testing.Short() {
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return
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}
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tl := struct {
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name string
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id uint16
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}{
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name: "tstVlan",
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id: 32,
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}
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masterLink := testLink{"tstEth", "dummy"}
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addLink(t, masterLink.name, masterLink.linkType)
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defer deleteLink(t, masterLink.name)
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if err := NetworkLinkAddVlan(masterLink.name, tl.name, tl.id); err != nil {
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t.Fatalf("Unable to create %#v VLAN interface: %s", tl, err)
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}
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readLink(t, tl.name)
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}
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func TestNetworkLinkAddMacVlan(t *testing.T) {
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if testing.Short() {
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return
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}
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tl := struct {
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name string
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mode string
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}{
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name: "tstVlan",
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mode: "private",
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}
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masterLink := testLink{"tstEth", "dummy"}
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addLink(t, masterLink.name, masterLink.linkType)
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defer deleteLink(t, masterLink.name)
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if err := NetworkLinkAddMacVlan(masterLink.name, tl.name, tl.mode); err != nil {
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t.Fatalf("Unable to create %#v MAC VLAN interface: %s", tl, err)
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}
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readLink(t, tl.name)
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}
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func TestAddDelNetworkIp(t *testing.T) {
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if testing.Short() {
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return
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@ -252,7 +300,7 @@ func TestCreateVethPair(t *testing.T) {
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}
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//
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// netlink package test which do not use RTNETLINK
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// netlink package tests which do not use RTNETLINK
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//
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func TestCreateBridgeWithMac(t *testing.T) {
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if testing.Short() {
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