CNI: network create support macvlan modes

Support setting the macvlan mode with `podman network create -d macvlan
--opt mode=bridge`. This will correctly set the specified macvlan mode
in the cni conflist file.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

docs/source/markdown/podman-network-create.1.md

@@ -32,9 +32,14 @@ As rootless the `macvlan` driver has no access to the host network interfaces be
 
 Set driver specific options.
 
-For the `bridge` driver the following options are supported: `mtu` and `vlan`.
+All drivers accept the `mtu` option. The `mtu` option sets the Maximum Transmission Unit (MTU) and takes an integer value.
-The `mtu` option sets the Maximum Transmission Unit (MTU) and takes an integer value.
+
-The `vlan` option assign VLAN tag and enables vlan\_filtering. Defaults to none.
+Additionally the `bridge` driver supports the following option:
+- `vlan`: This option assign VLAN tag and enables vlan\_filtering. Defaults to none.
+
+The `macvlan` driver supports the following options:
+- `parent`: The host device which should be used for the macvlan interface. Defaults to the default route interface.
+- `mode`: This options sets the specified macvlan mode on the interface. Supported values are `bridge`, `private`, `vepa`, `passthru`. Defaults to `bridge`.
 
 #### **--gateway**
 

libpod/network/cni/cni_conversion.go

@@ -94,6 +94,10 @@ func createNetworkFromCNIConfigList(conf *libcni.NetworkConfigList, confPath str
 			network.Options["mtu"] = strconv.Itoa(macvlan.MTU)
 		}
 
+		if macvlan.Mode != "" {
+			network.Options["mode"] = macvlan.Mode
+		}
+
 		err = convertIPAMConfToNetwork(&network, macvlan.IPAM, confPath)
 		if err != nil {
 			return nil, err
@@ -237,6 +241,7 @@ func (n *cniNetwork) createCNIConfigListFromNetwork(network *types.Network, writ
 
 	vlan := 0
 	mtu := 0
+	macvlanMode := ""
 	for k, v := range network.Options {
 		switch k {
 		case "mtu":
@@ -251,6 +256,12 @@ func (n *cniNetwork) createCNIConfigListFromNetwork(network *types.Network, writ
 				return nil, "", err
 			}
 
+		case "mode":
+			if !pkgutil.StringInSlice(v, []string{"", "bridge", "private", "vepa", "passthru"}) {
+				return nil, "", errors.Errorf("unknown macvlan mode %q", v)
+			}
+			macvlanMode = v
+
 		default:
 			return nil, "", errors.Errorf("unsupported network option %s", k)
 		}
@@ -281,7 +292,7 @@ func (n *cniNetwork) createCNIConfigListFromNetwork(network *types.Network, writ
 		}
 
 	case types.MacVLANNetworkDriver:
-		plugins = append(plugins, newMacVLANPlugin(network.NetworkInterface, mtu, ipamConf))
+		plugins = append(plugins, newMacVLANPlugin(network.NetworkInterface, macvlanMode, mtu, ipamConf))
 
 	default:
 		return nil, "", errors.Errorf("driver %q is not supported by cni", network.Driver)

libpod/network/cni/cni_types.go

@@ -50,7 +50,7 @@ type hostLocalBridge struct {
 	PromiscMode  bool            `json:"promiscMode,omitempty"`
 	Vlan         int             `json:"vlan,omitempty"`
 	IPAM         ipamConfig      `json:"ipam"`
-	Capabilities map[string]bool `json:"capabilities"`
+	Capabilities map[string]bool `json:"capabilities,omitempty"`
 }
 
 // ipamConfig describes an IPAM configuration
@@ -88,7 +88,8 @@ type macVLANConfig struct {
 	Master       string          `json:"master"`
 	IPAM         ipamConfig      `json:"ipam"`
 	MTU          int             `json:"mtu,omitempty"`
-	Capabilities map[string]bool `json:"capabilities"`
+	Mode         string          `json:"mode,omitempty"`
+	Capabilities map[string]bool `json:"capabilities,omitempty"`
 }
 
 // firewallConfig describes the firewall plugin
@@ -260,7 +261,7 @@ func hasDNSNamePlugin(paths []string) bool {
 }
 
 // newMacVLANPlugin creates a macvlanconfig with a given device name
-func newMacVLANPlugin(device string, mtu int, ipam ipamConfig) macVLANConfig {
+func newMacVLANPlugin(device, mode string, mtu int, ipam ipamConfig) macVLANConfig {
 	m := macVLANConfig{
 		PluginType: "macvlan",
 		IPAM:       ipam,
@@ -268,6 +269,9 @@ func newMacVLANPlugin(device string, mtu int, ipam ipamConfig) macVLANConfig {
 	if mtu > 0 {
 		m.MTU = mtu
 	}
+	if len(mode) > 0 {
+		m.Mode = mode
+	}
 	// CNI is supposed to use the default route if a
 	// parent device is not provided
 	if len(device) > 0 {

libpod/network/cni/config_test.go

@@ -250,6 +250,39 @@ var _ = Describe("Config", func() {
 			grepInFile(path, `"type": "host-local"`)
 		})
 
+		It("create macvlan config with mode", func() {
+			for _, mode := range []string{"bridge", "private", "vepa", "passthru"} {
+				network := types.Network{
+					Driver: "macvlan",
+					Options: map[string]string{
+						"mode": mode,
+					},
+				}
+				network1, err := libpodNet.NetworkCreate(network)
+				Expect(err).To(BeNil())
+				Expect(network1.Name).ToNot(BeEmpty())
+				path := filepath.Join(cniConfDir, network1.Name+".conflist")
+				Expect(path).To(BeARegularFile())
+				Expect(network1.Driver).To(Equal("macvlan"))
+				Expect(network1.Options).To(HaveKeyWithValue("mode", mode))
+				Expect(network1.IPAMOptions).ToNot(BeEmpty())
+				Expect(network1.IPAMOptions).To(HaveKeyWithValue("driver", "dhcp"))
+				grepInFile(path, `"mode": "`+mode+`"`)
+			}
+		})
+
+		It("create macvlan config with invalid mode", func() {
+			network := types.Network{
+				Driver: "macvlan",
+				Options: map[string]string{
+					"mode": "test",
+				},
+			}
+			_, err := libpodNet.NetworkCreate(network)
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring(`unknown macvlan mode "test"`))
+		})
+
 		It("create macvlan config with invalid device", func() {
 			network := types.Network{
 				Driver:           "macvlan",