From bd0e22ed14ca09a7b656f4603c13aac3a4066968 Mon Sep 17 00:00:00 2001
From: baude <bbaude@redhat.com>
Date: Tue, 2 Feb 2021 13:24:14 -0600
Subject: Honor network options for macvlan networks

when creating a macvlan network, we should honor gateway, subnet, and
mtu as provided by the user.

Fixes: #9167

Signed-off-by: baude <bbaude@redhat.com>
---
 libpod/network/config.go      |  5 ++++-
 libpod/network/create.go      | 15 ++++++++++++++-
 libpod/network/netconflist.go | 16 ++++++++++++++--
 3 files changed, 32 insertions(+), 4 deletions(-)

(limited to 'libpod')

diff --git a/libpod/network/config.go b/libpod/network/config.go
index ce351129e..294e23509 100644
--- a/libpod/network/config.go
+++ b/libpod/network/config.go
@@ -103,7 +103,9 @@ func (p PortMapConfig) Bytes() ([]byte, error) {
 
 // IPAMDHCP describes the ipamdhcp config
 type IPAMDHCP struct {
-	DHCP string `json:"type"`
+	DHCP   string                     `json:"type"`
+	Routes []IPAMRoute                `json:"routes,omitempty"`
+	Ranges [][]IPAMLocalHostRangeConf `json:"ranges,omitempty"`
 }
 
 // MacVLANConfig describes the macvlan config
@@ -111,6 +113,7 @@ type MacVLANConfig struct {
 	PluginType string   `json:"type"`
 	Master     string   `json:"master"`
 	IPAM       IPAMDHCP `json:"ipam"`
+	MTU        int      `json:"mtu,omitempty"`
 }
 
 // Bytes outputs the configuration as []byte
diff --git a/libpod/network/create.go b/libpod/network/create.go
index 88310a79c..deacf487a 100644
--- a/libpod/network/create.go
+++ b/libpod/network/create.go
@@ -249,6 +249,7 @@ func createBridge(name string, options entities.NetworkCreateOptions, runtimeCon
 
 func createMacVLAN(name string, options entities.NetworkCreateOptions, runtimeConfig *config.Config) (string, error) {
 	var (
+		mtu     int
 		plugins []CNIPlugins
 	)
 	liveNetNames, err := GetLiveNetworkNames()
@@ -283,7 +284,19 @@ func createMacVLAN(name string, options entities.NetworkCreateOptions, runtimeCo
 		}
 	}
 	ncList := NewNcList(name, version.Current(), options.Labels)
-	macvlan := NewMacVLANPlugin(parentNetworkDevice)
+	if val, ok := options.Options["mtu"]; ok {
+		intVal, err := strconv.Atoi(val)
+		if err != nil {
+			return "", err
+		}
+		if intVal > 0 {
+			mtu = intVal
+		}
+	}
+	macvlan, err := NewMacVLANPlugin(parentNetworkDevice, options.Gateway, &options.Range, &options.Subnet, mtu)
+	if err != nil {
+		return "", err
+	}
 	plugins = append(plugins, macvlan)
 	ncList["plugins"] = plugins
 	b, err := json.MarshalIndent(ncList, "", "   ")
diff --git a/libpod/network/netconflist.go b/libpod/network/netconflist.go
index ca6a4a70b..9be98e78f 100644
--- a/libpod/network/netconflist.go
+++ b/libpod/network/netconflist.go
@@ -172,19 +172,31 @@ func HasDNSNamePlugin(paths []string) bool {
 }
 
 // NewMacVLANPlugin creates a macvlanconfig with a given device name
-func NewMacVLANPlugin(device string) MacVLANConfig {
+func NewMacVLANPlugin(device string, gateway net.IP, ipRange *net.IPNet, subnet *net.IPNet, mtu int) (MacVLANConfig, error) {
 	i := IPAMDHCP{DHCP: "dhcp"}
+	if gateway != nil || ipRange != nil || subnet != nil {
+		ipam, err := NewIPAMLocalHostRange(subnet, ipRange, gateway)
+		if err != nil {
+			return MacVLANConfig{}, err
+		}
+		ranges := make([][]IPAMLocalHostRangeConf, 0)
+		ranges = append(ranges, ipam)
+		i.Ranges = ranges
+	}
 
 	m := MacVLANConfig{
 		PluginType: "macvlan",
 		IPAM:       i,
 	}
+	if mtu > 0 {
+		m.MTU = mtu
+	}
 	// CNI is supposed to use the default route if a
 	// parent device is not provided
 	if len(device) > 0 {
 		m.Master = device
 	}
-	return m
+	return m, nil
 }
 
 // IfPassesFilter filters NetworkListReport and returns true if the filter match the given config
-- 
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