Golang osl.GenerateKey函數代碼示例

func (n *network) initSandbox(restore bool) error {
	n.Lock()
	n.initEpoch++
	n.Unlock()

	networkOnce.Do(networkOnceInit)

	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.
	key := ""
	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)
	}

	n.setSandbox(sbox)

	if !restore {
		n.driver.peerDbUpdateSandbox(n.id)
	}

	var nlSock *nl.NetlinkSocket
	sbox.InvokeFunc(func() {
		nlSock, err = nl.Subscribe(syscall.NETLINK_ROUTE, syscall.RTNLGRP_NEIGH)
		if err != nil {
			err = fmt.Errorf("failed to subscribe to neighbor group netlink messages")
		}
	})

	if nlSock != nil {
		go n.watchMiss(nlSock)
	}

	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) {
				// 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() error {
	n.Lock()
	n.initEpoch++
	n.Unlock()

	sbox, err := osl.NewSandbox(
		osl.GenerateKey(fmt.Sprintf("%d-", n.initEpoch)+n.id), true)
	if err != nil {
		return fmt.Errorf("could not create network sandbox: %v", err)
	}

	n.setSandbox(sbox)

	n.driver.peerDbUpdateSandbox(n.id)

	var nlSock *nl.NetlinkSocket
	sbox.InvokeFunc(func() {
		nlSock, err = nl.Subscribe(syscall.NETLINK_ROUTE, syscall.RTNLGRP_NEIGH)
		if err != nil {
			err = fmt.Errorf("failed to subscribe to neighbor group netlink messages")
		}
	})

	go n.watchMiss(nlSock)
	return nil
}

func (n *network) initSandbox() error {
	n.Lock()
	n.initEpoch++
	n.Unlock()

	sbox, err := osl.NewSandbox(
		osl.GenerateKey(fmt.Sprintf("%d-", n.initEpoch)+n.id), true)
	if err != nil {
		return fmt.Errorf("could not create network sandbox: %v", err)
	}

	// Add a bridge inside the namespace
	if err := sbox.AddInterface("bridge1", "br",
		sbox.InterfaceOptions().Address(bridgeIP),
		sbox.InterfaceOptions().Bridge(true)); err != nil {
		return fmt.Errorf("could not create bridge inside the network sandbox: %v", err)
	}

	n.setSandbox(sbox)

	var nlSock *nl.NetlinkSocket
	sbox.InvokeFunc(func() {
		nlSock, err = nl.Subscribe(syscall.NETLINK_ROUTE, syscall.RTNLGRP_NEIGH)
		if err != nil {
			err = fmt.Errorf("failed to subscribe to neighbor group netlink messages")
		}
	})

	go n.watchMiss(nlSock)
	return n.initVxlan()
}

func (n *network) initSandbox(restore bool) error {
	n.Lock()
	n.initEpoch++
	n.Unlock()

	networkOnce.Do(networkOnceInit)

	if !restore {
		// 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.
	key := ""
	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)
	}

	n.setSandbox(sbox)

	if !restore {
		n.driver.peerDbUpdateSandbox(n.id)
	}

	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) {
				syscall.Unmount(path, syscall.MNT_DETACH)
				os.Remove(path)
			}

			return nil
		})
}

func populateVNITbl() {
	filepath.Walk(filepath.Dir(osl.GenerateKey("walk")),
		func(path string, info os.FileInfo, err 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, syscall.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.Delete()

			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 (n *network) initSandbox() error {
	n.Lock()
	n.initEpoch++
	n.Unlock()

	networkOnce.Do(networkOnceInit)

	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()

	sbox, err := osl.NewSandbox(
		osl.GenerateKey(fmt.Sprintf("%d-", n.initEpoch)+n.id), !hostMode)
	if err != nil {
		return fmt.Errorf("could not create network sandbox: %v", err)
	}

	n.setSandbox(sbox)

	n.driver.peerDbUpdateSandbox(n.id)

	var nlSock *nl.NetlinkSocket
	sbox.InvokeFunc(func() {
		nlSock, err = nl.Subscribe(syscall.NETLINK_ROUTE, syscall.RTNLGRP_NEIGH)
		if err != nil {
			err = fmt.Errorf("failed to subscribe to neighbor group netlink messages")
		}
	})

	if nlSock != nil {
		go n.watchMiss(nlSock)
	}

	return nil
}

func (sb *sandbox) Key() string {
	if sb.config.useDefaultSandBox {
		return osl.GenerateKey("default")
	}
	return osl.GenerateKey(sb.id)
}