conf,qemu: Use type-aware switches where possible

The compiler can warn us if we add a value to the
virDomainChrSerialTargetType enumeration but forget to handle
it properly in the code. Let's take advantage of that.

This commit is best viewed with 'git diff -w'.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NPavel Hrdina <phrdina@redhat.com>

src/conf/domain_conf.c

@@ -4037,26 +4037,39 @@ virDomainDefAddConsoleCompat(virDomainDefPtr def)
             def->consoles[0]->targetType = VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL;
         }
     } else if (def->os.type == VIR_DOMAIN_OSTYPE_HVM && def->nserials > 0 &&
-               def->serials[0]->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_SERIAL &&
-               def->serials[0]->targetType == VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_ISA) {
-        /* Create a stub console to match the serial port.
-         * console[0] either does not exist
-         *                or has a different type than SERIAL or NONE.
-         */
-        virDomainChrDefPtr chr;
-        if (!(chr = virDomainChrDefNew(NULL)))
-            return -1;
+               def->serials[0]->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_SERIAL) {
 
-        if (VIR_INSERT_ELEMENT(def->consoles,
-                               0,
-                               def->nconsoles,
-                               chr) < 0) {
-            virDomainChrDefFree(chr);
-            return -1;
+        switch ((virDomainChrSerialTargetType) def->serials[0]->targetType) {
+        case VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_ISA: {
+
+            /* Create a stub console to match the serial port.
+             * console[0] either does not exist
+             *                or has a different type than SERIAL or NONE.
+             */
+            virDomainChrDefPtr chr;
+            if (!(chr = virDomainChrDefNew(NULL)))
+                return -1;
+
+            if (VIR_INSERT_ELEMENT(def->consoles,
+                                   0,
+                                   def->nconsoles,
+                                   chr) < 0) {
+                virDomainChrDefFree(chr);
+                return -1;
+            }
+
+            def->consoles[0]->deviceType = VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE;
+            def->consoles[0]->targetType = VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL;
+
+            break;
         }
 
-        def->consoles[0]->deviceType = VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE;
-        def->consoles[0]->targetType = VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_SERIAL;
+        case VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_PCI:
+        case VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_USB:
+        case VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_LAST:
+            /* Nothing to do */
+            break;
+        }
     }
 
     return 0;

src/qemu/qemu_command.c

@@ -10251,7 +10251,7 @@ qemuBuildSerialChrDeviceStr(char **deviceStr,
                               serial->info.alias);
         }
     } else {
-        switch (serial->targetType) {
+        switch ((virDomainChrSerialTargetType) serial->targetType) {
         case VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_USB:
             if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_USB_SERIAL)) {
                 virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
@@ -10290,6 +10290,11 @@ qemuBuildSerialChrDeviceStr(char **deviceStr,
                 goto error;
             }
             break;
+
+        case VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_LAST:
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("Invalid target type for serial device"));
+            goto error;
         }
 
         virBufferAsprintf(&cmd, "%s,chardev=char%s,id=%s",