// CreatePort creates a port in ovs switch
func (sw *OvsSwitch) CreatePort(intfName string, cfgEp *mastercfg.CfgEndpointState, pktTag int) error {
var ovsIntfType string
// Get OVS port name
ovsPortName := getOvsPostName(intfName)
// Create Veth pairs if required
if useVethPair {
ovsIntfType = ""
// Create a Veth pair
err := createVethPair(intfName, ovsPortName)
if err != nil {
log.Errorf("Error creating veth pairs. Err: %v", err)
return err
}
// Set the OVS side of the port as up
err = setLinkUp(ovsPortName)
if err != nil {
log.Errorf("Error setting link %s up. Err: %v", ovsPortName, err)
return err
}
} else {
ovsPortName = intfName
ovsIntfType = "internal"
}
// Set the link mtu to 1450 to allow for 50 bytes vxlan encap
// (inner eth header(14) + outer IP(20) outer UDP(8) + vxlan header(8))
err := setLinkMtu(intfName, vxlanEndpointMtu)
if err != nil {
log.Errorf("Error setting link %s mtu. Err: %v", intfName, err)
return err
}
// Ask OVSDB driver to add the port
err = sw.ovsdbDriver.CreatePort(ovsPortName, ovsIntfType, cfgEp.ID, pktTag)
if err != nil {
return err
}
defer func() {
if err != nil {
sw.ovsdbDriver.DeletePort(intfName)
}
}()
// Wait a little for OVS to create the interface
time.Sleep(300 * time.Millisecond)
// Set the interface mac address
err = netutils.SetInterfaceMac(intfName, cfgEp.MacAddress)
if err != nil {
log.Errorf("Error setting interface Mac %s on port %s", cfgEp.MacAddress, intfName)
return err
}
// Add the endpoint to ofnet
// Get the openflow port number for the interface
ofpPort, err := sw.ovsdbDriver.GetOfpPortNo(ovsPortName)
if err != nil {
log.Errorf("Could not find the OVS port %s. Err: %v", ovsPortName, err)
return err
}
macAddr, _ := net.ParseMAC(cfgEp.MacAddress)
// Build the endpoint info
endpoint := ofnet.EndpointInfo{
PortNo: ofpPort,
MacAddr: macAddr,
Vlan: uint16(pktTag),
IpAddr: net.ParseIP(cfgEp.IPAddress),
EndpointGroup: cfgEp.EndpointGroupID,
}
log.Infof("Adding local endpoint: {%+v}", endpoint)
// Add the local port to ofnet
err = sw.ofnetAgent.AddLocalEndpoint(endpoint)
if err != nil {
log.Errorf("Error adding local port %s to ofnet. Err: %v", ovsPortName, err)
return err
}
return nil
}
// AddHostPort adds a host port to the OVS
func (sw *OvsSwitch) AddHostPort(intfName string, intfNum int, isHostNS bool) error {
var err error
// some error checking
if sw.netType != "host" {
log.Fatalf("Can not add host port to OVS type %s.", sw.netType)
}
if sw.hostBridge == nil {
log.Fatalf("Cannot add host port -- no host bridge")
}
ovsPortType := ""
ovsPortName := getOvsPortName(intfName, isHostNS)
if isHostNS {
ovsPortType = "internal"
} else {
// Create a Veth pair
err := createVethPair(intfName, ovsPortName)
// Set the OVS side of the port as up
err = setLinkUp(ovsPortName)
if err != nil {
log.Errorf("Error setting link %s up. Err: %v", ovsPortName, err)
return err
}
}
portID := "host" + intfName
// If the port already exists in OVS, remove it first
if sw.ovsdbDriver.IsPortNamePresent(ovsPortName) {
log.Debugf("Removing existing interface entry %s from OVS", ovsPortName)
// Delete it from ovsdb
err := sw.ovsdbDriver.DeletePort(ovsPortName)
if err != nil {
log.Errorf("Error deleting port %s from OVS. Err: %v", ovsPortName, err)
}
}
// Ask OVSDB driver to add the port as an access port
err = sw.ovsdbDriver.CreatePort(ovsPortName, ovsPortType, portID, hostVLAN, 0, 0)
if err != nil {
log.Errorf("Error adding hostport %s to OVS. Err: %v", intfName, err)
return err
}
// Get the openflow port number for the interface
ofpPort, err := sw.ovsdbDriver.GetOfpPortNo(ovsPortName)
if err != nil {
log.Errorf("Could not find the OVS port %s. Err: %v", intfName, err)
return err
}
// Assign an IP based on the intfnumber
ipStr, macStr := netutils.PortToHostIPMAC(intfNum)
mac, _ := net.ParseMAC(macStr)
ip := net.ParseIP(ipStr)
portInfo := ofnet.EndpointInfo{
PortNo: ofpPort,
MacAddr: mac,
IpAddr: ip,
}
// Add to ofnet if this is the hostNS port.
netutils.SetInterfaceMac(intfName, macStr)
netutils.SetInterfaceIP(intfName, ipStr)
err = setLinkUp(intfName)
if isHostNS {
err = sw.hostBridge.AddHostPort(portInfo)
if err != nil {
log.Errorf("Error adding host port %s. Err: %v", intfName, err)
return err
}
log.Infof("Added host port %s to OVS switch %s.", intfName, sw.bridgeName)
}
defer func() {
if err != nil {
sw.ovsdbDriver.DeletePort(intfName)
}
}()
return nil
}