/usr/share/gocode/src/github.com/docker/libnetwork/drvregistry/drvregistry.go is in golang-github-docker-libnetwork-dev 0.8.0-dev.2+git20170202.599.45b4086-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import (
"fmt"
"strings"
"sync"
"github.com/docker/docker/pkg/plugingetter"
"github.com/docker/libnetwork/driverapi"
"github.com/docker/libnetwork/ipamapi"
"github.com/docker/libnetwork/types"
)
type driverData struct {
driver driverapi.Driver
capability driverapi.Capability
}
type ipamData struct {
driver ipamapi.Ipam
capability *ipamapi.Capability
// default address spaces are provided by ipam driver at registration time
defaultLocalAddressSpace, defaultGlobalAddressSpace string
}
type driverTable map[string]*driverData
type ipamTable map[string]*ipamData
// DrvRegistry holds the registry of all network drivers and IPAM drivers that it knows about.
type DrvRegistry struct {
sync.Mutex
drivers driverTable
ipamDrivers ipamTable
dfn DriverNotifyFunc
ifn IPAMNotifyFunc
pluginGetter plugingetter.PluginGetter
}
// Functors definition
// InitFunc defines the driver initialization function signature.
type InitFunc func(driverapi.DriverCallback, map[string]interface{}) error
// IPAMWalkFunc defines the IPAM driver table walker function signature.
type IPAMWalkFunc func(name string, driver ipamapi.Ipam, cap *ipamapi.Capability) bool
// DriverWalkFunc defines the network driver table walker function signature.
type DriverWalkFunc func(name string, driver driverapi.Driver, capability driverapi.Capability) bool
// IPAMNotifyFunc defines the notify function signature when a new IPAM driver gets registered.
type IPAMNotifyFunc func(name string, driver ipamapi.Ipam, cap *ipamapi.Capability) error
// DriverNotifyFunc defines the notify function signature when a new network driver gets registered.
type DriverNotifyFunc func(name string, driver driverapi.Driver, capability driverapi.Capability) error
// New retruns a new driver registry handle.
func New(lDs, gDs interface{}, dfn DriverNotifyFunc, ifn IPAMNotifyFunc, pg plugingetter.PluginGetter) (*DrvRegistry, error) {
r := &DrvRegistry{
drivers: make(driverTable),
ipamDrivers: make(ipamTable),
dfn: dfn,
ifn: ifn,
pluginGetter: pg,
}
return r, nil
}
// AddDriver adds a network driver to the registry.
func (r *DrvRegistry) AddDriver(ntype string, fn InitFunc, config map[string]interface{}) error {
return fn(r, config)
}
// WalkIPAMs walks the IPAM drivers registered in the registry and invokes the passed walk function and each one of them.
func (r *DrvRegistry) WalkIPAMs(ifn IPAMWalkFunc) {
type ipamVal struct {
name string
data *ipamData
}
r.Lock()
ivl := make([]ipamVal, 0, len(r.ipamDrivers))
for k, v := range r.ipamDrivers {
ivl = append(ivl, ipamVal{name: k, data: v})
}
r.Unlock()
for _, iv := range ivl {
if ifn(iv.name, iv.data.driver, iv.data.capability) {
break
}
}
}
// WalkDrivers walks the network drivers registered in the registry and invokes the passed walk function and each one of them.
func (r *DrvRegistry) WalkDrivers(dfn DriverWalkFunc) {
type driverVal struct {
name string
data *driverData
}
r.Lock()
dvl := make([]driverVal, 0, len(r.drivers))
for k, v := range r.drivers {
dvl = append(dvl, driverVal{name: k, data: v})
}
r.Unlock()
for _, dv := range dvl {
if dfn(dv.name, dv.data.driver, dv.data.capability) {
break
}
}
}
// Driver returns the actual network driver instance and its capability which registered with the passed name.
func (r *DrvRegistry) Driver(name string) (driverapi.Driver, *driverapi.Capability) {
r.Lock()
defer r.Unlock()
d, ok := r.drivers[name]
if !ok {
return nil, nil
}
return d.driver, &d.capability
}
// IPAM returns the actual IPAM driver instance and its capability which registered with the passed name.
func (r *DrvRegistry) IPAM(name string) (ipamapi.Ipam, *ipamapi.Capability) {
r.Lock()
defer r.Unlock()
i, ok := r.ipamDrivers[name]
if !ok {
return nil, nil
}
return i.driver, i.capability
}
// IPAMDefaultAddressSpaces returns the default address space strings for the passed IPAM driver name.
func (r *DrvRegistry) IPAMDefaultAddressSpaces(name string) (string, string, error) {
r.Lock()
defer r.Unlock()
i, ok := r.ipamDrivers[name]
if !ok {
return "", "", fmt.Errorf("ipam %s not found", name)
}
return i.defaultLocalAddressSpace, i.defaultGlobalAddressSpace, nil
}
// GetPluginGetter returns the plugingetter
func (r *DrvRegistry) GetPluginGetter() plugingetter.PluginGetter {
return r.pluginGetter
}
// RegisterDriver registers the network driver when it gets discovered.
func (r *DrvRegistry) RegisterDriver(ntype string, driver driverapi.Driver, capability driverapi.Capability) error {
if strings.TrimSpace(ntype) == "" {
return fmt.Errorf("network type string cannot be empty")
}
r.Lock()
dd, ok := r.drivers[ntype]
r.Unlock()
if ok && dd.driver.IsBuiltIn() {
return driverapi.ErrActiveRegistration(ntype)
}
if r.dfn != nil {
if err := r.dfn(ntype, driver, capability); err != nil {
return err
}
}
dData := &driverData{driver, capability}
r.Lock()
r.drivers[ntype] = dData
r.Unlock()
return nil
}
func (r *DrvRegistry) registerIpamDriver(name string, driver ipamapi.Ipam, caps *ipamapi.Capability) error {
if strings.TrimSpace(name) == "" {
return fmt.Errorf("ipam driver name string cannot be empty")
}
r.Lock()
dd, ok := r.ipamDrivers[name]
r.Unlock()
if ok && dd.driver.IsBuiltIn() {
return types.ForbiddenErrorf("ipam driver %q already registered", name)
}
locAS, glbAS, err := driver.GetDefaultAddressSpaces()
if err != nil {
return types.InternalErrorf("ipam driver %q failed to return default address spaces: %v", name, err)
}
if r.ifn != nil {
if err := r.ifn(name, driver, caps); err != nil {
return err
}
}
r.Lock()
r.ipamDrivers[name] = &ipamData{driver: driver, defaultLocalAddressSpace: locAS, defaultGlobalAddressSpace: glbAS, capability: caps}
r.Unlock()
return nil
}
// RegisterIpamDriver registers the IPAM driver discovered with default capabilities.
func (r *DrvRegistry) RegisterIpamDriver(name string, driver ipamapi.Ipam) error {
return r.registerIpamDriver(name, driver, &ipamapi.Capability{})
}
// RegisterIpamDriverWithCapabilities registers the IPAM driver discovered with specified capabilities.
func (r *DrvRegistry) RegisterIpamDriverWithCapabilities(name string, driver ipamapi.Ipam, caps *ipamapi.Capability) error {
return r.registerIpamDriver(name, driver, caps)
}
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