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362 lines
8.9 KiB
Go
362 lines
8.9 KiB
Go
//go:build linux
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// +build linux
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package macvlan
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import (
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"encoding/json"
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"fmt"
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"net"
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"github.com/docker/docker/libnetwork/datastore"
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"github.com/docker/docker/libnetwork/discoverapi"
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"github.com/docker/docker/libnetwork/netlabel"
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"github.com/docker/docker/libnetwork/types"
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"github.com/sirupsen/logrus"
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)
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const (
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macvlanPrefix = "macvlan"
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macvlanNetworkPrefix = macvlanPrefix + "/network"
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macvlanEndpointPrefix = macvlanPrefix + "/endpoint"
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)
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// networkConfiguration for this driver's network specific configuration
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type configuration struct {
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ID string
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Mtu int
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dbIndex uint64
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dbExists bool
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Internal bool
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Parent string
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MacvlanMode string
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CreatedSlaveLink bool
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Ipv4Subnets []*ipv4Subnet
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Ipv6Subnets []*ipv6Subnet
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}
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type ipv4Subnet struct {
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SubnetIP string
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GwIP string
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}
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type ipv6Subnet struct {
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SubnetIP string
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GwIP string
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}
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// initStore drivers are responsible for caching their own persistent state
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func (d *driver) initStore(option map[string]interface{}) error {
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if data, ok := option[netlabel.LocalKVClient]; ok {
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var err error
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dsc, ok := data.(discoverapi.DatastoreConfigData)
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if !ok {
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return types.InternalErrorf("incorrect data in datastore configuration: %v", data)
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}
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d.store, err = datastore.NewDataStoreFromConfig(dsc)
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if err != nil {
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return types.InternalErrorf("macvlan driver failed to initialize data store: %v", err)
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}
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err = d.populateNetworks()
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if err != nil {
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return err
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}
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err = d.populateEndpoints()
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if err != nil {
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return err
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}
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}
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return nil
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}
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// populateNetworks is invoked at driver init to recreate persistently stored networks
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func (d *driver) populateNetworks() error {
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kvol, err := d.store.List(datastore.Key(macvlanPrefix), &configuration{})
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if err != nil && err != datastore.ErrKeyNotFound {
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return fmt.Errorf("failed to get macvlan network configurations from store: %v", err)
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}
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// If empty it simply means no macvlan networks have been created yet
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if err == datastore.ErrKeyNotFound {
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return nil
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}
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for _, kvo := range kvol {
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config := kvo.(*configuration)
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if _, err = d.createNetwork(config); err != nil {
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logrus.Warnf("Could not create macvlan network for id %s from persistent state", config.ID)
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}
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}
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return nil
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}
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func (d *driver) populateEndpoints() error {
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kvol, err := d.store.List(datastore.Key(macvlanEndpointPrefix), &endpoint{})
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if err != nil && err != datastore.ErrKeyNotFound {
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return fmt.Errorf("failed to get macvlan endpoints from store: %v", err)
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}
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if err == datastore.ErrKeyNotFound {
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return nil
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}
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for _, kvo := range kvol {
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ep := kvo.(*endpoint)
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n, ok := d.networks[ep.nid]
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if !ok {
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logrus.Debugf("Network (%.7s) not found for restored macvlan endpoint (%.7s)", ep.nid, ep.id)
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logrus.Debugf("Deleting stale macvlan endpoint (%.7s) from store", ep.id)
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if err := d.storeDelete(ep); err != nil {
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logrus.Debugf("Failed to delete stale macvlan endpoint (%.7s) from store", ep.id)
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}
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continue
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}
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n.endpoints[ep.id] = ep
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logrus.Debugf("Endpoint (%.7s) restored to network (%.7s)", ep.id, ep.nid)
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}
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return nil
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}
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// storeUpdate used to update persistent macvlan network records as they are created
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func (d *driver) storeUpdate(kvObject datastore.KVObject) error {
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if d.store == nil {
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logrus.Warnf("macvlan store not initialized. kv object %s is not added to the store", datastore.Key(kvObject.Key()...))
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return nil
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}
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if err := d.store.PutObjectAtomic(kvObject); err != nil {
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return fmt.Errorf("failed to update macvlan store for object type %T: %v", kvObject, err)
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}
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return nil
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}
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// storeDelete used to delete macvlan records from persistent cache as they are deleted
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func (d *driver) storeDelete(kvObject datastore.KVObject) error {
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if d.store == nil {
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logrus.Debugf("macvlan store not initialized. kv object %s is not deleted from store", datastore.Key(kvObject.Key()...))
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return nil
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}
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retry:
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if err := d.store.DeleteObjectAtomic(kvObject); err != nil {
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if err == datastore.ErrKeyModified {
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if err := d.store.GetObject(datastore.Key(kvObject.Key()...), kvObject); err != nil {
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return fmt.Errorf("could not update the kvobject to latest when trying to delete: %v", err)
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}
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goto retry
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}
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return err
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}
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return nil
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}
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func (config *configuration) MarshalJSON() ([]byte, error) {
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nMap := make(map[string]interface{})
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nMap["ID"] = config.ID
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nMap["Mtu"] = config.Mtu
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nMap["Parent"] = config.Parent
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nMap["MacvlanMode"] = config.MacvlanMode
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nMap["Internal"] = config.Internal
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nMap["CreatedSubIface"] = config.CreatedSlaveLink
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if len(config.Ipv4Subnets) > 0 {
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iis, err := json.Marshal(config.Ipv4Subnets)
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if err != nil {
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return nil, err
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}
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nMap["Ipv4Subnets"] = string(iis)
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}
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if len(config.Ipv6Subnets) > 0 {
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iis, err := json.Marshal(config.Ipv6Subnets)
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if err != nil {
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return nil, err
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}
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nMap["Ipv6Subnets"] = string(iis)
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}
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return json.Marshal(nMap)
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}
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func (config *configuration) UnmarshalJSON(b []byte) error {
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var (
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err error
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nMap map[string]interface{}
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)
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if err = json.Unmarshal(b, &nMap); err != nil {
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return err
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}
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config.ID = nMap["ID"].(string)
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config.Mtu = int(nMap["Mtu"].(float64))
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config.Parent = nMap["Parent"].(string)
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config.MacvlanMode = nMap["MacvlanMode"].(string)
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config.Internal = nMap["Internal"].(bool)
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config.CreatedSlaveLink = nMap["CreatedSubIface"].(bool)
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if v, ok := nMap["Ipv4Subnets"]; ok {
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if err := json.Unmarshal([]byte(v.(string)), &config.Ipv4Subnets); err != nil {
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return err
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}
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}
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if v, ok := nMap["Ipv6Subnets"]; ok {
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if err := json.Unmarshal([]byte(v.(string)), &config.Ipv6Subnets); err != nil {
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return err
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}
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}
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return nil
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}
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func (config *configuration) Key() []string {
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return []string{macvlanNetworkPrefix, config.ID}
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}
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func (config *configuration) KeyPrefix() []string {
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return []string{macvlanNetworkPrefix}
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}
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func (config *configuration) Value() []byte {
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b, err := json.Marshal(config)
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if err != nil {
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return nil
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}
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return b
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}
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func (config *configuration) SetValue(value []byte) error {
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return json.Unmarshal(value, config)
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}
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func (config *configuration) Index() uint64 {
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return config.dbIndex
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}
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func (config *configuration) SetIndex(index uint64) {
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config.dbIndex = index
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config.dbExists = true
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}
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func (config *configuration) Exists() bool {
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return config.dbExists
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}
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func (config *configuration) Skip() bool {
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return false
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}
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func (config *configuration) New() datastore.KVObject {
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return &configuration{}
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}
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func (config *configuration) CopyTo(o datastore.KVObject) error {
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dstNcfg := o.(*configuration)
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*dstNcfg = *config
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return nil
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}
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func (config *configuration) DataScope() string {
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return datastore.LocalScope
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}
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func (ep *endpoint) MarshalJSON() ([]byte, error) {
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epMap := make(map[string]interface{})
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epMap["id"] = ep.id
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epMap["nid"] = ep.nid
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epMap["SrcName"] = ep.srcName
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if len(ep.mac) != 0 {
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epMap["MacAddress"] = ep.mac.String()
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}
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if ep.addr != nil {
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epMap["Addr"] = ep.addr.String()
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}
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if ep.addrv6 != nil {
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epMap["Addrv6"] = ep.addrv6.String()
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}
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return json.Marshal(epMap)
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}
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func (ep *endpoint) UnmarshalJSON(b []byte) error {
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var (
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err error
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epMap map[string]interface{}
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)
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if err = json.Unmarshal(b, &epMap); err != nil {
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return fmt.Errorf("Failed to unmarshal to macvlan endpoint: %v", err)
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}
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if v, ok := epMap["MacAddress"]; ok {
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if ep.mac, err = net.ParseMAC(v.(string)); err != nil {
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return types.InternalErrorf("failed to decode macvlan endpoint MAC address (%s) after json unmarshal: %v", v.(string), err)
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}
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}
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if v, ok := epMap["Addr"]; ok {
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if ep.addr, err = types.ParseCIDR(v.(string)); err != nil {
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return types.InternalErrorf("failed to decode macvlan endpoint IPv4 address (%s) after json unmarshal: %v", v.(string), err)
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}
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}
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if v, ok := epMap["Addrv6"]; ok {
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if ep.addrv6, err = types.ParseCIDR(v.(string)); err != nil {
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return types.InternalErrorf("failed to decode macvlan endpoint IPv6 address (%s) after json unmarshal: %v", v.(string), err)
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}
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}
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ep.id = epMap["id"].(string)
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ep.nid = epMap["nid"].(string)
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ep.srcName = epMap["SrcName"].(string)
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return nil
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}
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func (ep *endpoint) Key() []string {
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return []string{macvlanEndpointPrefix, ep.id}
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}
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func (ep *endpoint) KeyPrefix() []string {
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return []string{macvlanEndpointPrefix}
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}
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func (ep *endpoint) Value() []byte {
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b, err := json.Marshal(ep)
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if err != nil {
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return nil
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}
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return b
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}
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func (ep *endpoint) SetValue(value []byte) error {
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return json.Unmarshal(value, ep)
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}
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func (ep *endpoint) Index() uint64 {
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return ep.dbIndex
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}
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func (ep *endpoint) SetIndex(index uint64) {
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ep.dbIndex = index
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ep.dbExists = true
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}
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func (ep *endpoint) Exists() bool {
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return ep.dbExists
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}
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func (ep *endpoint) Skip() bool {
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return false
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}
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func (ep *endpoint) New() datastore.KVObject {
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return &endpoint{}
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}
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func (ep *endpoint) CopyTo(o datastore.KVObject) error {
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dstEp := o.(*endpoint)
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*dstEp = *ep
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return nil
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}
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func (ep *endpoint) DataScope() string {
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return datastore.LocalScope
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}
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