vmtypes names cannot be used as machine names

florent found a bug where he used "applehv" as a machine name.  it turns out when we use a vmtype name, esp. the active type, it really messes up directory structures for configuration and images alike.

Signed-off-by: Brent Baude <bbaude@redhat.com>

cmd/podman/machine/init.go

@@ -140,6 +140,12 @@ func initMachine(cmd *cobra.Command, args []string) error {
 		}
 		initOpts.Name = args[0]
 	}
+
+	// The vmtype names need to be reserved and cannot be used for podman machine names
+	if _, err := machine.ParseVMType(initOpts.Name, machine.UnknownVirt); err == nil {
+		return fmt.Errorf("cannot use %q for a machine name", initOpts.Name)
+	}
+
 	if _, err := provider.LoadVMByName(initOpts.Name); err == nil {
 		return fmt.Errorf("%s: %w", initOpts.Name, machine.ErrVMAlreadyExists)
 	}

pkg/machine/config.go

@@ -346,6 +346,7 @@ const (
 	WSLVirt
 	AppleHvVirt
 	HyperVVirt
+	UnknownVirt
 )
 
 func (v VMType) String() string {
@@ -383,7 +384,7 @@ func ParseVMType(input string, emptyFallback VMType) (VMType, error) {
 	case "":
 		return emptyFallback, nil
 	default:
-		return QemuVirt, fmt.Errorf("unknown VMType `%s`", input)
+		return UnknownVirt, fmt.Errorf("unknown VMType `%s`", input)
 	}
 }
 

pkg/machine/e2e/init_test.go

@@ -41,6 +41,12 @@ var _ = Describe("podman machine init", func() {
 		Expect(err).ToNot(HaveOccurred())
 		Expect(session).To(Exit(125))
 
+		reservedName := initMachine{}
+		reservedNameSession, err := mb.setName(testProvider.VMType().String()).setCmd(&reservedName).run()
+		Expect(err).ToNot(HaveOccurred())
+		Expect(reservedNameSession).To(Exit(125))
+		Expect(reservedNameSession.errorToString()).To(ContainSubstring(fmt.Sprintf("cannot use %q", testProvider.VMType().String())))
+
 		badName := "foobar"
 		bm := basicMachine{}
 		sysConn, err := mb.setCmd(bm.withPodmanCommand([]string{"system", "connection", "add", badName, "tcp://localhost:8000"})).run()