Add virtualization framework virtiofs command line option

Signed-off-by: Frédéric Dalleau <frederic.dalleau@docker.com>

src/cmd/linuxkit/run_virtualizationframework.go

@@ -22,6 +22,7 @@ type virtualizationFramwworkConfig struct {
 	state          string
 	networking     string
 	kernelBoot     bool
+	virtiofsShares []string
 }
 
 func runVirtualizationFrameworkCmd() *cobra.Command {
@@ -31,6 +32,7 @@ func runVirtualizationFrameworkCmd() *cobra.Command {
 		state          string
 		networking     string
 		kernelBoot     bool
+		virtiofsShares []string
 	)
 
 	cmd := &cobra.Command{
@@ -51,6 +53,7 @@ func runVirtualizationFrameworkCmd() *cobra.Command {
 				state:          state,
 				networking:     networking,
 				kernelBoot:     kernelBoot,
+				virtiofsShares: virtiofsShares,
 			}
 			return runVirtualizationFramework(cfg, args[0])
 		},
@@ -63,6 +66,7 @@ func runVirtualizationFrameworkCmd() *cobra.Command {
 	cmd.Flags().StringVar(&networking, "networking", virtualizationNetworkingDefault, "Networking mode. Valid options are 'default', 'vmnet' and 'none'. 'vmnet' uses the Apple vmnet framework. 'none' disables networking.`")
 
 	cmd.Flags().BoolVar(&kernelBoot, "kernel", false, "Boot image is kernel+initrd+cmdline 'path'-kernel/-initrd/-cmdline")
+	cmd.Flags().StringArrayVar(&virtiofsShares, "virtiofs", []string{}, "Directory shared on virtiofs")
 
 	return cmd
 }

src/cmd/linuxkit/run_virtualizationframework_darwin_cgo_enabled.go

@@ -239,6 +239,30 @@ func runVirtualizationFramework(cfg virtualizationFramwworkConfig, path string)
 	config.SetSocketDevicesVirtualMachineConfiguration([]vz.SocketDeviceConfiguration{
 		socketDeviceConfiguration,
 	})
+
+	if len(cfg.virtiofsShares) > 0 {
+		var cs []vz.DirectorySharingDeviceConfiguration
+
+		for idx, share := range cfg.virtiofsShares {
+			tag := fmt.Sprintf("virtiofs%d", idx)
+			device, err := vz.NewVirtioFileSystemDeviceConfiguration(tag)
+			if err != nil {
+				log.Fatal("virtiofs device configuration failed", err)
+			}
+			dir, err := vz.NewSharedDirectory(share, false)
+			if err != nil {
+				log.Fatal("virtiofs shared directory failed", err)
+			}
+			single, err := vz.NewSingleDirectoryShare(dir)
+			if err != nil {
+				log.Fatal("virtiofs single directory share failed", err)
+			}
+			device.SetDirectoryShare(single)
+			cs = append(cs, device)
+		}
+		config.SetDirectorySharingDevicesVirtualMachineConfiguration(cs)
+	}
+
 	validated, err := config.Validate()
 	if !validated || err != nil {
 		log.Fatal("validation failed", err)