func releaseVF(conf *NetConf, ifName string, initns ns.NetNS) error {
// get VF device
vfDev, err := netlink.LinkByName(ifName)
if err != nil {
return fmt.Errorf("failed to lookup vf %d device %q: %v", conf.VF, ifName, err)
}
// device name in init netns
index := vfDev.Attrs().Index
devName := fmt.Sprintf("dev%d", index)
// shutdown VF device
if err = netlink.LinkSetDown(vfDev); err != nil {
return fmt.Errorf("failed to down vf % device: %v", conf.VF, err)
}
// rename VF device
err = renameLink(ifName, devName)
if err != nil {
return fmt.Errorf("failed to rename vf %d evice %q to %q: %v", conf.VF, ifName, devName, err)
}
// move VF device to init netns
if err = netlink.LinkSetNsFd(vfDev, int(initns.Fd())); err != nil {
return fmt.Errorf("failed to move vf %d to init netns: %v", conf.VF, err)
}
return nil
}
func createMacvlan(conf *NetConf, ifName string, netns ns.NetNS) 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 netns.Do(func(_ ns.NetNS) error {
// 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)
}
err := renameLink(tmpName, ifName)
if err != nil {
_ = netlink.LinkDel(mv)
return fmt.Errorf("failed to rename macvlan to %q: %v", ifName, err)
}
return nil
})
}
func createIpvlan(conf *NetConf, ifName string, netns ns.NetNS) 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.IPVlan{
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 ipvlan: %v", err)
}
return netns.Do(func(_ ns.NetNS) error {
err := renameLink(tmpName, ifName)
if err != nil {
return fmt.Errorf("failed to rename ipvlan to %q: %v", ifName, err)
}
return nil
})
}
// SetupVeth sets up a virtual ethernet link.
// Should be in container netns, and will switch back to hostNS to set the host
// veth end up.
func SetupVeth(contVethName string, mtu int, hostNS ns.NetNS) (hostVeth, contVeth netlink.Link, err error) {
var hostVethName string
hostVethName, contVeth, err = makeVeth(contVethName, mtu)
if err != nil {
return
}
if err = netlink.LinkSetUp(contVeth); err != nil {
err = fmt.Errorf("failed to set %q up: %v", contVethName, err)
return
}
hostVeth, err = netlink.LinkByName(hostVethName)
if err != nil {
err = fmt.Errorf("failed to lookup %q: %v", hostVethName, err)
return
}
if err = netlink.LinkSetNsFd(hostVeth, int(hostNS.Fd())); err != nil {
err = fmt.Errorf("failed to move veth to host netns: %v", err)
return
}
err = hostNS.Do(func(_ ns.NetNS) error {
hostVeth, err := netlink.LinkByName(hostVethName)
if err != nil {
return fmt.Errorf("failed to lookup %q in %q: %v", hostVethName, hostNS.Path(), err)
}
if err = netlink.LinkSetUp(hostVeth); err != nil {
return fmt.Errorf("failed to set %q up: %v", hostVethName, err)
}
return nil
})
return
}
func getInodeNS(netns ns.NetNS) (uint64, error) {
return getInodeFd(int(netns.Fd()))
}
func setupVF(conf *NetConf, ifName string, netns ns.NetNS) error {
masterName := conf.Master
vfIdx := conf.VF
m, err := netlink.LinkByName(masterName)
if err != nil {
return fmt.Errorf("failed to lookup master %q: %v", conf.Master, err)
}
vfDir := fmt.Sprintf("/sys/class/net/%s/device/virtfn%d/net", masterName, vfIdx)
if _, err := os.Lstat(vfDir); err != nil {
return err
}
infos, err := ioutil.ReadDir(vfDir)
if err != nil {
return err
}
if len(infos) != 1 {
return fmt.Errorf("Mutiple network devices in directory %s", vfDir)
}
// VF NIC name
vfDevName := infos[0].Name()
vfDev, err := netlink.LinkByName(vfDevName)
if err != nil {
return fmt.Errorf("failed to lookup vf device %q: %v", vfDevName, err)
}
// set hardware address
if conf.MAC != "" {
macAddr, err := net.ParseMAC(conf.MAC)
if err != nil {
return err
}
if err = netlink.LinkSetVfHardwareAddr(m, conf.VF, macAddr); err != nil {
return fmt.Errorf("failed to set vf %d macaddress: %v", conf.VF, err)
}
}
if conf.Vlan != 0 {
if err = netlink.LinkSetVfVlan(m, conf.VF, conf.Vlan); err != nil {
return fmt.Errorf("failed to set vf %d vlan: %v", conf.VF, err)
}
}
if err = netlink.LinkSetUp(vfDev); err != nil {
return fmt.Errorf("failed to setup vf %d device: %v", conf.VF, err)
}
// move VF device to ns
if err = netlink.LinkSetNsFd(vfDev, int(netns.Fd())); err != nil {
return fmt.Errorf("failed to move vf %d to netns: %v", conf.VF, err)
}
return netns.Do(func(_ ns.NetNS) error {
err := renameLink(vfDevName, ifName)
if err != nil {
return fmt.Errorf("failed to rename vf %d device %q to %q: %v", conf.VF, vfDevName, ifName, err)
}
return nil
})
}
