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ov_network.go
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ov_network.go
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//go:build linux
// +build linux
package overlay
import (
"encoding/json"
"fmt"
"net"
"os"
"os/exec"
"path/filepath"
"runtime"
"strconv"
"strings"
"sync"
"github.com/docker/docker/libnetwork/datastore"
"github.com/docker/docker/libnetwork/driverapi"
"github.com/docker/docker/libnetwork/netlabel"
"github.com/docker/docker/libnetwork/netutils"
"github.com/docker/docker/libnetwork/ns"
"github.com/docker/docker/libnetwork/osl"
"github.com/docker/docker/libnetwork/resolvconf"
"github.com/docker/docker/libnetwork/types"
"github.com/docker/docker/pkg/reexec"
"github.com/hashicorp/go-multierror"
"github.com/sirupsen/logrus"
"github.com/vishvananda/netlink"
"github.com/vishvananda/netlink/nl"
"github.com/vishvananda/netns"
"golang.org/x/sys/unix"
)
var (
hostMode bool
networkOnce sync.Once
networkMu sync.Mutex
vniTbl = make(map[uint32]string)
)
type networkTable map[string]*network
type subnet struct {
sboxInit bool
vxlanName string
brName string
vni uint32
initErr error
subnetIP *net.IPNet
gwIP *net.IPNet
}
type subnetJSON struct {
SubnetIP string
GwIP string
Vni uint32
}
type network struct {
id string
dbIndex uint64
dbExists bool
sbox osl.Sandbox
nlSocket *nl.NetlinkSocket
endpoints endpointTable
driver *driver
joinCnt int
sboxInit bool
initEpoch int
initErr error
subnets []*subnet
secure bool
mtu int
sync.Mutex
}
func init() {
reexec.Register("set-default-vlan", setDefaultVlan)
}
func setDefaultVlan() {
if len(os.Args) < 3 {
logrus.Error("insufficient number of arguments")
os.Exit(1)
}
runtime.LockOSThread()
defer runtime.UnlockOSThread()
nsPath := os.Args[1]
ns, err := netns.GetFromPath(nsPath)
if err != nil {
logrus.Errorf("overlay namespace get failed, %v", err)
os.Exit(1)
}
if err = netns.Set(ns); err != nil {
logrus.Errorf("setting into overlay namespace failed, %v", err)
os.Exit(1)
}
// make sure the sysfs mount doesn't propagate back
if err = unix.Unshare(unix.CLONE_NEWNS); err != nil {
logrus.Errorf("unshare failed, %v", err)
os.Exit(1)
}
flag := unix.MS_PRIVATE | unix.MS_REC
if err = unix.Mount("", "/", "", uintptr(flag), ""); err != nil {
logrus.Errorf("root mount failed, %v", err)
os.Exit(1)
}
if err = unix.Mount("sysfs", "/sys", "sysfs", 0, ""); err != nil {
logrus.Errorf("mounting sysfs failed, %v", err)
os.Exit(1)
}
brName := os.Args[2]
path := filepath.Join("/sys/class/net", brName, "bridge/default_pvid")
data := []byte{'0', '\n'}
if err = os.WriteFile(path, data, 0644); err != nil {
logrus.Errorf("enabling default vlan on bridge %s failed %v", brName, err)
os.Exit(1)
}
os.Exit(0)
}
func (d *driver) NetworkAllocate(id string, option map[string]string, ipV4Data, ipV6Data []driverapi.IPAMData) (map[string]string, error) {
return nil, types.NotImplementedErrorf("not implemented")
}
func (d *driver) NetworkFree(id string) error {
return types.NotImplementedErrorf("not implemented")
}
func (d *driver) CreateNetwork(id string, option map[string]interface{}, nInfo driverapi.NetworkInfo, ipV4Data, ipV6Data []driverapi.IPAMData) error {
if id == "" {
return fmt.Errorf("invalid network id")
}
if len(ipV4Data) == 0 || ipV4Data[0].Pool.String() == "0.0.0.0/0" {
return types.BadRequestErrorf("ipv4 pool is empty")
}
// Since we perform lazy configuration make sure we try
// configuring the driver when we enter CreateNetwork
if err := d.configure(); err != nil {
return err
}
n := &network{
id: id,
driver: d,
endpoints: endpointTable{},
subnets: []*subnet{},
}
vnis := make([]uint32, 0, len(ipV4Data))
if gval, ok := option[netlabel.GenericData]; ok {
optMap := gval.(map[string]string)
if val, ok := optMap[netlabel.OverlayVxlanIDList]; ok {
logrus.Debugf("overlay: Received vxlan IDs: %s", val)
vniStrings := strings.Split(val, ",")
for _, vniStr := range vniStrings {
vni, err := strconv.Atoi(vniStr)
if err != nil {
return fmt.Errorf("invalid vxlan id value %q passed", vniStr)
}
vnis = append(vnis, uint32(vni))
}
}
if _, ok := optMap[secureOption]; ok {
n.secure = true
}
if val, ok := optMap[netlabel.DriverMTU]; ok {
var err error
if n.mtu, err = strconv.Atoi(val); err != nil {
return fmt.Errorf("failed to parse %v: %v", val, err)
}
if n.mtu < 0 {
return fmt.Errorf("invalid MTU value: %v", n.mtu)
}
}
}
// If we are getting vnis from libnetwork, either we get for
// all subnets or none.
if len(vnis) != 0 && len(vnis) < len(ipV4Data) {
return fmt.Errorf("insufficient vnis(%d) passed to overlay", len(vnis))
}
for i, ipd := range ipV4Data {
s := &subnet{
subnetIP: ipd.Pool,
gwIP: ipd.Gateway,
}
if len(vnis) != 0 {
s.vni = vnis[i]
}
n.subnets = append(n.subnets, s)
}
d.Lock()
defer d.Unlock()
if d.networks[n.id] != nil {
return fmt.Errorf("attempt to create overlay network %v that already exists", n.id)
}
if err := n.writeToStore(); err != nil {
return fmt.Errorf("failed to update data store for network %v: %v", n.id, err)
}
// Make sure no rule is on the way from any stale secure network
if !n.secure {
for _, vni := range vnis {
programMangle(vni, false)
programInput(vni, false)
}
}
if nInfo != nil {
if err := nInfo.TableEventRegister(ovPeerTable, driverapi.EndpointObject); err != nil {
// XXX Undo writeToStore? No method to so. Why?
return err
}
}
d.networks[id] = n
return nil
}
func (d *driver) DeleteNetwork(nid string) error {
if nid == "" {
return fmt.Errorf("invalid network id")
}
// Make sure driver resources are initialized before proceeding
if err := d.configure(); err != nil {
return err
}
d.Lock()
// Only perform a peer flush operation (if required) AFTER unlocking
// the driver lock to avoid deadlocking w/ the peerDB.
var doPeerFlush bool
defer func() {
d.Unlock()
if doPeerFlush {
d.peerFlush(nid)
}
}()
// This is similar to d.network(), but we need to keep holding the lock
// until we are done removing this network.
n, ok := d.networks[nid]
if !ok {
n = d.restoreNetworkFromStore(nid)
}
if n == nil {
return fmt.Errorf("could not find network with id %s", nid)
}
for _, ep := range n.endpoints {
if ep.ifName != "" {
if link, err := ns.NlHandle().LinkByName(ep.ifName); err == nil {
if err := ns.NlHandle().LinkDel(link); err != nil {
logrus.WithError(err).Warnf("Failed to delete interface (%s)'s link on endpoint (%s) delete", ep.ifName, ep.id)
}
}
}
if err := d.deleteEndpointFromStore(ep); err != nil {
logrus.Warnf("Failed to delete overlay endpoint %.7s from local store: %v", ep.id, err)
}
}
doPeerFlush = true
delete(d.networks, nid)
vnis, err := n.releaseVxlanID()
if err != nil {
return err
}
if n.secure {
for _, vni := range vnis {
programMangle(vni, false)
programInput(vni, false)
}
}
return nil
}
func (d *driver) ProgramExternalConnectivity(nid, eid string, options map[string]interface{}) error {
return nil
}
func (d *driver) RevokeExternalConnectivity(nid, eid string) error {
return nil
}
func (n *network) joinSandbox(s *subnet, restore bool, incJoinCount bool) error {
// If there is a race between two go routines here only one will win
// the other will wait.
networkOnce.Do(networkOnceInit)
n.Lock()
// If non-restore initialization occurred and was successful then
// tell the peerDB to initialize the sandbox with all the peers
// previously received from networkdb. But only do this after
// unlocking the network. Otherwise we could deadlock with
// on the peerDB channel while peerDB is waiting for the network lock.
var doInitPeerDB bool
defer func() {
n.Unlock()
if doInitPeerDB {
go n.driver.initSandboxPeerDB(n.id)
}
}()
if !n.sboxInit {
n.initErr = n.initSandbox(restore)
doInitPeerDB = n.initErr == nil && !restore
// If there was an error, we cannot recover it
n.sboxInit = true
}
if n.initErr != nil {
return fmt.Errorf("network sandbox join failed: %v", n.initErr)
}
subnetErr := s.initErr
if !s.sboxInit {
subnetErr = n.initSubnetSandbox(s, restore)
// We can recover from these errors, but not on restore
if restore || subnetErr == nil {
s.initErr = subnetErr
s.sboxInit = true
}
}
if subnetErr != nil {
return fmt.Errorf("subnet sandbox join failed for %q: %v", s.subnetIP.String(), subnetErr)
}
if incJoinCount {
n.joinCnt++
}
return nil
}
func (n *network) leaveSandbox() {
n.Lock()
defer n.Unlock()
n.joinCnt--
if n.joinCnt != 0 {
return
}
n.destroySandbox()
n.sboxInit = false
n.initErr = nil
for _, s := range n.subnets {
s.sboxInit = false
s.initErr = nil
}
}
// to be called while holding network lock
func (n *network) destroySandbox() {
if n.sbox != nil {
for _, iface := range n.sbox.Info().Interfaces() {
if err := iface.Remove(); err != nil {
logrus.Debugf("Remove interface %s failed: %v", iface.SrcName(), err)
}
}
for _, s := range n.subnets {
if hostMode {
if err := removeFilters(n.id[:12], s.brName); err != nil {
logrus.Warnf("Could not remove overlay filters: %v", err)
}
}
if s.vxlanName != "" {
err := deleteInterface(s.vxlanName)
if err != nil {
logrus.Warnf("could not cleanup sandbox properly: %v", err)
}
}
}
if hostMode {
if err := removeNetworkChain(n.id[:12]); err != nil {
logrus.Warnf("could not remove network chain: %v", err)
}
}
// Close the netlink socket, this will also release the watchMiss goroutine that is using it
if n.nlSocket != nil {
n.nlSocket.Close()
n.nlSocket = nil
}
n.sbox.Destroy()
n.sbox = nil
}
}
func populateVNITbl() {
filepath.Walk(filepath.Dir(osl.GenerateKey("walk")),
// NOTE(cpuguy83): The linter picked up on the fact that this walk function was not using this error argument
// That seems wrong... however I'm not familiar with this code or if that error matters
func(path string, info os.FileInfo, _ error) error {
_, fname := filepath.Split(path)
if len(strings.Split(fname, "-")) <= 1 {
return nil
}
ns, err := netns.GetFromPath(path)
if err != nil {
logrus.Errorf("Could not open namespace path %s during vni population: %v", path, err)
return nil
}
defer ns.Close()
nlh, err := netlink.NewHandleAt(ns, unix.NETLINK_ROUTE)
if err != nil {
logrus.Errorf("Could not open netlink handle during vni population for ns %s: %v", path, err)
return nil
}
defer nlh.Close()
err = nlh.SetSocketTimeout(soTimeout)
if err != nil {
logrus.Warnf("Failed to set the timeout on the netlink handle sockets for vni table population: %v", err)
}
links, err := nlh.LinkList()
if err != nil {
logrus.Errorf("Failed to list interfaces during vni population for ns %s: %v", path, err)
return nil
}
for _, l := range links {
if l.Type() == "vxlan" {
vniTbl[uint32(l.(*netlink.Vxlan).VxlanId)] = path
}
}
return nil
})
}
func networkOnceInit() {
populateVNITbl()
if os.Getenv("_OVERLAY_HOST_MODE") != "" {
hostMode = true
return
}
err := createVxlan("testvxlan", 1, 0)
if err != nil {
logrus.Errorf("Failed to create testvxlan interface: %v", err)
return
}
defer deleteInterface("testvxlan")
path := "/proc/self/ns/net"
hNs, err := netns.GetFromPath(path)
if err != nil {
logrus.Errorf("Failed to get network namespace from path %s while setting host mode: %v", path, err)
return
}
defer hNs.Close()
nlh := ns.NlHandle()
iface, err := nlh.LinkByName("testvxlan")
if err != nil {
logrus.Errorf("Failed to get link testvxlan while setting host mode: %v", err)
return
}
// If we are not able to move the vxlan interface to a namespace
// then fallback to host mode
if err := nlh.LinkSetNsFd(iface, int(hNs)); err != nil {
hostMode = true
}
}
func (n *network) generateVxlanName(s *subnet) string {
id := n.id
if len(n.id) > 5 {
id = n.id[:5]
}
return fmt.Sprintf("vx-%06x-%v", s.vni, id)
}
func (n *network) generateBridgeName(s *subnet) string {
id := n.id
if len(n.id) > 5 {
id = n.id[:5]
}
return n.getBridgeNamePrefix(s) + "-" + id
}
func (n *network) getBridgeNamePrefix(s *subnet) string {
return fmt.Sprintf("ov-%06x", s.vni)
}
func checkOverlap(nw *net.IPNet) error {
var nameservers []string
if rc, err := resolvconf.Get(); err == nil {
nameservers = resolvconf.GetNameserversAsCIDR(rc.Content)
}
if err := netutils.CheckNameserverOverlaps(nameservers, nw); err != nil {
return fmt.Errorf("overlay subnet %s failed check with nameserver: %v: %v", nw.String(), nameservers, err)
}
if err := netutils.CheckRouteOverlaps(nw); err != nil {
return fmt.Errorf("overlay subnet %s failed check with host route table: %v", nw.String(), err)
}
return nil
}
func (n *network) restoreSubnetSandbox(s *subnet, brName, vxlanName string) error {
sbox := n.sbox
// restore overlay osl sandbox
Ifaces := make(map[string][]osl.IfaceOption)
brIfaceOption := make([]osl.IfaceOption, 2)
brIfaceOption = append(brIfaceOption, sbox.InterfaceOptions().Address(s.gwIP))
brIfaceOption = append(brIfaceOption, sbox.InterfaceOptions().Bridge(true))
Ifaces[brName+"+br"] = brIfaceOption
err := sbox.Restore(Ifaces, nil, nil, nil)
if err != nil {
return err
}
Ifaces = make(map[string][]osl.IfaceOption)
vxlanIfaceOption := make([]osl.IfaceOption, 1)
vxlanIfaceOption = append(vxlanIfaceOption, sbox.InterfaceOptions().Master(brName))
Ifaces[vxlanName+"+vxlan"] = vxlanIfaceOption
return sbox.Restore(Ifaces, nil, nil, nil)
}
func (n *network) setupSubnetSandbox(s *subnet, brName, vxlanName string) error {
if hostMode {
// Try to delete stale bridge interface if it exists
if err := deleteInterface(brName); err != nil {
deleteInterfaceBySubnet(n.getBridgeNamePrefix(s), s)
}
// Try to delete the vxlan interface by vni if already present
deleteVxlanByVNI("", s.vni)
if err := checkOverlap(s.subnetIP); err != nil {
return err
}
}
if !hostMode {
// Try to find this subnet's vni is being used in some
// other namespace by looking at vniTbl that we just
// populated in the once init. If a hit is found then
// it must a stale namespace from previous
// life. Destroy it completely and reclaim resourced.
networkMu.Lock()
path, ok := vniTbl[s.vni]
networkMu.Unlock()
if ok {
deleteVxlanByVNI(path, s.vni)
if err := unix.Unmount(path, unix.MNT_FORCE); err != nil {
logrus.Errorf("unmount of %s failed: %v", path, err)
}
os.Remove(path)
networkMu.Lock()
delete(vniTbl, s.vni)
networkMu.Unlock()
}
}
// create a bridge and vxlan device for this subnet and move it to the sandbox
sbox := n.sbox
if err := sbox.AddInterface(brName, "br",
sbox.InterfaceOptions().Address(s.gwIP),
sbox.InterfaceOptions().Bridge(true)); err != nil {
return fmt.Errorf("bridge creation in sandbox failed for subnet %q: %v", s.subnetIP.String(), err)
}
err := createVxlan(vxlanName, s.vni, n.maxMTU())
if err != nil {
return err
}
if err := sbox.AddInterface(vxlanName, "vxlan",
sbox.InterfaceOptions().Master(brName)); err != nil {
// If adding vxlan device to the overlay namespace fails, remove the bridge interface we
// already added to the namespace. This allows the caller to try the setup again.
for _, iface := range sbox.Info().Interfaces() {
if iface.SrcName() == brName {
if ierr := iface.Remove(); ierr != nil {
logrus.Errorf("removing bridge failed from ov ns %v failed, %v", n.sbox.Key(), ierr)
}
}
}
// Also, delete the vxlan interface. Since a global vni id is associated
// with the vxlan interface, an orphaned vxlan interface will result in
// failure of vxlan device creation if the vni is assigned to some other
// network.
if deleteErr := deleteInterface(vxlanName); deleteErr != nil {
logrus.Warnf("could not delete vxlan interface, %s, error %v, after config error, %v", vxlanName, deleteErr, err)
}
return fmt.Errorf("vxlan interface creation failed for subnet %q: %v", s.subnetIP.String(), err)
}
if !hostMode {
var name string
for _, i := range sbox.Info().Interfaces() {
if i.Bridge() {
name = i.DstName()
}
}
cmd := &exec.Cmd{
Path: reexec.Self(),
Args: []string{"set-default-vlan", sbox.Key(), name},
Stdout: os.Stdout,
Stderr: os.Stderr,
}
if err := cmd.Run(); err != nil {
// not a fatal error
logrus.Errorf("reexec to set bridge default vlan failed %v", err)
}
}
if hostMode {
if err := addFilters(n.id[:12], brName); err != nil {
return err
}
}
return nil
}
// Must be called with the network lock
func (n *network) initSubnetSandbox(s *subnet, restore bool) error {
brName := n.generateBridgeName(s)
vxlanName := n.generateVxlanName(s)
// Program iptables rules for mandatory encryption of the secure
// network, or clean up leftover rules for a stale secure network which
// was previously assigned the same VNI.
if err := programMangle(s.vni, n.secure); err != nil {
return err
}
if err := programInput(s.vni, n.secure); err != nil {
if n.secure {
return multierror.Append(err, programMangle(s.vni, false))
}
}
if restore {
if err := n.restoreSubnetSandbox(s, brName, vxlanName); err != nil {
return err
}
} else {
if err := n.setupSubnetSandbox(s, brName, vxlanName); err != nil {
return err
}
}
s.vxlanName = vxlanName
s.brName = brName
return nil
}
func (n *network) cleanupStaleSandboxes() {
filepath.Walk(filepath.Dir(osl.GenerateKey("walk")),
func(path string, info os.FileInfo, err error) error {
_, fname := filepath.Split(path)
pList := strings.Split(fname, "-")
if len(pList) <= 1 {
return nil
}
pattern := pList[1]
if strings.Contains(n.id, pattern) {
// Delete all vnis
deleteVxlanByVNI(path, 0)
unix.Unmount(path, unix.MNT_DETACH)
os.Remove(path)
// Now that we have destroyed this
// sandbox, remove all references to
// it in vniTbl so that we don't
// inadvertently destroy the sandbox
// created in this life.
networkMu.Lock()
for vni, tblPath := range vniTbl {
if tblPath == path {
delete(vniTbl, vni)
}
}
networkMu.Unlock()
}
return nil
})
}
func (n *network) initSandbox(restore bool) error {
n.initEpoch++
if !restore {
if hostMode {
if err := addNetworkChain(n.id[:12]); err != nil {
return err
}
}
// If there are any stale sandboxes related to this network
// from previous daemon life clean it up here
n.cleanupStaleSandboxes()
}
// In the restore case network sandbox already exist; but we don't know
// what epoch number it was created with. It has to be retrieved by
// searching the net namespaces.
var key string
if restore {
key = osl.GenerateKey("-" + n.id)
} else {
key = osl.GenerateKey(fmt.Sprintf("%d-", n.initEpoch) + n.id)
}
sbox, err := osl.NewSandbox(key, !hostMode, restore)
if err != nil {
return fmt.Errorf("could not get network sandbox (oper %t): %v", restore, err)
}
// this is needed to let the peerAdd configure the sandbox
n.sbox = sbox
// If we are in swarm mode, we don't need anymore the watchMiss routine.
// This will save 1 thread and 1 netlink socket per network
if !n.driver.isSerfAlive() {
return nil
}
var nlSock *nl.NetlinkSocket
sbox.InvokeFunc(func() {
nlSock, err = nl.Subscribe(unix.NETLINK_ROUTE, unix.RTNLGRP_NEIGH)
if err != nil {
return
}
// set the receive timeout to not remain stuck on the RecvFrom if the fd gets closed
tv := unix.NsecToTimeval(soTimeout.Nanoseconds())
err = nlSock.SetReceiveTimeout(&tv)
})
n.nlSocket = nlSock
if err == nil {
go n.watchMiss(nlSock, key)
} else {
logrus.Errorf("failed to subscribe to neighbor group netlink messages for overlay network %s in sbox %s: %v",
n.id, sbox.Key(), err)
}
return nil
}
func (n *network) watchMiss(nlSock *nl.NetlinkSocket, nsPath string) {
// With the new version of the netlink library the deserialize function makes
// requests about the interface of the netlink message. This can succeed only
// if this go routine is in the target namespace. For this reason following we
// lock the thread on that namespace
runtime.LockOSThread()
defer runtime.UnlockOSThread()
newNs, err := netns.GetFromPath(nsPath)
if err != nil {
logrus.WithError(err).Errorf("failed to get the namespace %s", nsPath)
return
}
defer newNs.Close()
if err = netns.Set(newNs); err != nil {
logrus.WithError(err).Errorf("failed to enter the namespace %s", nsPath)
return
}
for {
msgs, _, err := nlSock.Receive()
if err != nil {
n.Lock()
nlFd := nlSock.GetFd()
n.Unlock()
if nlFd == -1 {
// The netlink socket got closed, simply exit to not leak this goroutine
return
}
// When the receive timeout expires the receive will return EAGAIN
if err == unix.EAGAIN {
// we continue here to avoid spam for timeouts
continue
}
logrus.Errorf("Failed to receive from netlink: %v ", err)
continue
}
for _, msg := range msgs {
if msg.Header.Type != unix.RTM_GETNEIGH && msg.Header.Type != unix.RTM_NEWNEIGH {
continue
}
neigh, err := netlink.NeighDeserialize(msg.Data)
if err != nil {
logrus.Errorf("Failed to deserialize netlink ndmsg: %v", err)
continue
}
var (
ip net.IP
mac net.HardwareAddr
l2Miss, l3Miss bool
)
if neigh.IP.To4() != nil {
ip = neigh.IP
l3Miss = true
} else if neigh.HardwareAddr != nil {
mac = []byte(neigh.HardwareAddr)
ip = net.IP(mac[2:])
l2Miss = true
} else {
continue
}
// Not any of the network's subnets. Ignore.
if !n.contains(ip) {
continue
}
if neigh.State&(netlink.NUD_STALE|netlink.NUD_INCOMPLETE) == 0 {
continue
}
logrus.Debugf("miss notification: dest IP %v, dest MAC %v", ip, mac)
mac, IPmask, vtep, err := n.driver.resolvePeer(n.id, ip)
if err != nil {
logrus.Errorf("could not resolve peer %q: %v", ip, err)
continue
}
n.driver.peerAdd(n.id, "dummy", ip, IPmask, mac, vtep, l2Miss, l3Miss, false)
}
}
}
// Restore a network from the store to the driver if it is present.
// Must be called with the driver locked!
func (d *driver) restoreNetworkFromStore(nid string) *network {
n := d.getNetworkFromStore(nid)
if n != nil {
n.driver = d
n.endpoints = endpointTable{}
d.networks[nid] = n
}
return n
}
func (d *driver) network(nid string) *network {
d.Lock()
n, ok := d.networks[nid]
if !ok {
n = d.restoreNetworkFromStore(nid)
}
d.Unlock()
return n
}
func (d *driver) getNetworkFromStore(nid string) *network {
if d.store == nil {
return nil
}
n := &network{id: nid}
if err := d.store.GetObject(datastore.Key(n.Key()...), n); err != nil {
return nil
}
return n
}
func (n *network) sandbox() osl.Sandbox {
n.Lock()
defer n.Unlock()
return n.sbox
}
func (n *network) vxlanID(s *subnet) uint32 {
n.Lock()
defer n.Unlock()
return s.vni
}
func (n *network) setVxlanID(s *subnet, vni uint32) {
n.Lock()
s.vni = vni
n.Unlock()
}
func (n *network) Key() []string {
return []string{"overlay", "network", n.id}
}
func (n *network) KeyPrefix() []string {
return []string{"overlay", "network"}
}
func (n *network) Value() []byte {
m := map[string]interface{}{}
netJSON := []*subnetJSON{}
for _, s := range n.subnets {
sj := &subnetJSON{
SubnetIP: s.subnetIP.String(),
GwIP: s.gwIP.String(),
Vni: s.vni,
}
netJSON = append(netJSON, sj)
}
m["secure"] = n.secure
m["subnets"] = netJSON
m["mtu"] = n.mtu
b, err := json.Marshal(m)
if err != nil {
return []byte{}
}
return b
}
func (n *network) Index() uint64 {
return n.dbIndex
}
func (n *network) SetIndex(index uint64) {
n.dbIndex = index
n.dbExists = true
}
func (n *network) Exists() bool {
return n.dbExists
}
func (n *network) Skip() bool {
return false
}
func (n *network) SetValue(value []byte) error {
var (
m map[string]interface{}
newNet bool
isMap = true
netJSON = []*subnetJSON{}
)
if err := json.Unmarshal(value, &m); err != nil {
err := json.Unmarshal(value, &netJSON)
if err != nil {
return err
}
isMap = false
}
if len(n.subnets) == 0 {
newNet = true
}