Add podman network create option for bridge vlan

Signed-off-by: Anders F Björklund <anders.f.bjorklund@gmail.com>

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

@@ -30,8 +30,9 @@ Driver to manage the network (default "bridge").  Currently only `bridge` is sup
 
 Set driver specific options.
 
-For the `bridge` driver the following options are supported: `mtu`.
+For the `bridge` driver the following options are supported: `mtu` and `vlan`.
 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.
 
 #### **--gateway**
 

libpod/network/create.go

@@ -92,6 +92,14 @@ func parseMTU(mtu string) (int, error) {
 	return m, nil
 }
 
+// parseVlan parses the vlan option
+func parseVlan(vlan string) (int, error) {
+	if vlan == "" {
+		return 0, nil // default
+	}
+	return strconv.Atoi(vlan)
+}
+
 // createBridge creates a CNI network
 func createBridge(name string, options entities.NetworkCreateOptions, runtimeConfig *config.Config) (string, error) {
 	var (
@@ -170,6 +178,11 @@ func createBridge(name string, options entities.NetworkCreateOptions, runtimeCon
 		return "", err
 	}
 
+	vlan, err := parseVlan(options.Options["vlan"])
+	if err != nil {
+		return "", err
+	}
+
 	// obtain host bridge name
 	bridgeDeviceName, err := GetFreeDeviceName(runtimeConfig)
 	if err != nil {
@@ -193,7 +206,7 @@ func createBridge(name string, options entities.NetworkCreateOptions, runtimeCon
 	ncList := NewNcList(name, version.Current(), options.Labels)
 	var plugins []CNIPlugins
 	// TODO need to iron out the role of isDefaultGW and IPMasq
-	bridge := NewHostLocalBridge(bridgeDeviceName, isGateway, false, ipMasq, mtu, ipamConfig)
+	bridge := NewHostLocalBridge(bridgeDeviceName, isGateway, false, ipMasq, mtu, vlan, ipamConfig)
 	plugins = append(plugins, bridge)
 	plugins = append(plugins, NewPortMapPlugin())
 	plugins = append(plugins, NewFirewallPlugin())

libpod/network/netconflist.go

@@ -41,13 +41,14 @@ func NewNcList(name, version string, labels NcLabels) NcList {
 }
 
 // NewHostLocalBridge creates a new LocalBridge for host-local
-func NewHostLocalBridge(name string, isGateWay, isDefaultGW, ipMasq bool, mtu int, ipamConf IPAMHostLocalConf) *HostLocalBridge {
+func NewHostLocalBridge(name string, isGateWay, isDefaultGW, ipMasq bool, mtu int, vlan int, ipamConf IPAMHostLocalConf) *HostLocalBridge {
 	hostLocalBridge := HostLocalBridge{
 		PluginType:  "bridge",
 		BrName:      name,
 		IPMasq:      ipMasq,
 		MTU:         mtu,
 		HairpinMode: true,
+		Vlan:        vlan,
 		IPAM:        ipamConf,
 	}
 	if isGateWay {