libxl: Remove some goto labels in libxlDomainShutdownThread

There are too many goto labels in libxlDomainShutdownThread. Convert the
'destroy' and 'restart' labels to helper functions, leaving only the
commonly used pattern of 'endjob' and 'cleanup' labels.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>
ACKed-by: NMichal Privoznik <mprivozn@redhat.com>

src/libxl/libxl_domain.c

@@ -430,6 +430,30 @@ virDomainDefParserConfig libxlDomainDefParserConfig = {
 };
 
 
+static void
+libxlDomainShutdownHandleDestroy(libxlDriverPrivatePtr driver,
+                                 virDomainObjPtr vm)
+{
+    libxlDomainDestroyInternal(driver, vm);
+    libxlDomainCleanup(driver, vm);
+    if (!vm->persistent)
+        virDomainObjListRemove(driver->domains, vm);
+}
+
+
+static void
+libxlDomainShutdownHandleRestart(libxlDriverPrivatePtr driver,
+                                 virDomainObjPtr vm)
+{
+    libxlDomainDestroyInternal(driver, vm);
+    libxlDomainCleanup(driver, vm);
+    if (libxlDomainStartNew(driver, vm, false) < 0) {
+        VIR_ERROR(_("Failed to restart VM '%s': %s"),
+                  vm->def->name, virGetLastErrorMessage());
+    }
+}
+
+
 struct libxlShutdownThreadInfo
 {
     libxlDriverPrivatePtr driver;
@@ -468,10 +492,12 @@ libxlDomainShutdownThread(void *opaque)
                                            VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN);
         switch ((virDomainLifecycleAction) vm->def->onPoweroff) {
         case VIR_DOMAIN_LIFECYCLE_ACTION_DESTROY:
-            goto destroy;
+            libxlDomainShutdownHandleDestroy(driver, vm);
+            goto endjob;
         case VIR_DOMAIN_LIFECYCLE_ACTION_RESTART:
         case VIR_DOMAIN_LIFECYCLE_ACTION_RESTART_RENAME:
-            goto restart;
+            libxlDomainShutdownHandleRestart(driver, vm);
+            goto endjob;
         case VIR_DOMAIN_LIFECYCLE_ACTION_PRESERVE:
         case VIR_DOMAIN_LIFECYCLE_ACTION_COREDUMP_DESTROY:
         case VIR_DOMAIN_LIFECYCLE_ACTION_COREDUMP_RESTART:
@@ -487,19 +513,23 @@ libxlDomainShutdownThread(void *opaque)
                                            VIR_DOMAIN_EVENT_STOPPED_CRASHED);
         switch ((virDomainLifecycleAction) vm->def->onCrash) {
         case VIR_DOMAIN_LIFECYCLE_ACTION_DESTROY:
-            goto destroy;
+            libxlDomainShutdownHandleDestroy(driver, vm);
+            goto endjob;
         case VIR_DOMAIN_LIFECYCLE_ACTION_RESTART:
         case VIR_DOMAIN_LIFECYCLE_ACTION_RESTART_RENAME:
-            goto restart;
+            libxlDomainShutdownHandleRestart(driver, vm);
+            goto endjob;
         case VIR_DOMAIN_LIFECYCLE_ACTION_PRESERVE:
         case VIR_DOMAIN_LIFECYCLE_ACTION_LAST:
             goto endjob;
         case VIR_DOMAIN_LIFECYCLE_ACTION_COREDUMP_DESTROY:
             libxlDomainAutoCoreDump(driver, vm);
-            goto destroy;
+            libxlDomainShutdownHandleDestroy(driver, vm);
+            goto endjob;
         case VIR_DOMAIN_LIFECYCLE_ACTION_COREDUMP_RESTART:
             libxlDomainAutoCoreDump(driver, vm);
-            goto restart;
+            libxlDomainShutdownHandleRestart(driver, vm);
+            goto endjob;
         }
     } else if (xl_reason == LIBXL_SHUTDOWN_REASON_REBOOT) {
         virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF,
@@ -510,10 +540,12 @@ libxlDomainShutdownThread(void *opaque)
                                            VIR_DOMAIN_EVENT_STOPPED_SHUTDOWN);
         switch ((virDomainLifecycleAction) vm->def->onReboot) {
         case VIR_DOMAIN_LIFECYCLE_ACTION_DESTROY:
-            goto destroy;
+            libxlDomainShutdownHandleDestroy(driver, vm);
+            goto endjob;
         case VIR_DOMAIN_LIFECYCLE_ACTION_RESTART:
         case VIR_DOMAIN_LIFECYCLE_ACTION_RESTART_RENAME:
-            goto restart;
+            libxlDomainShutdownHandleRestart(driver, vm);
+            goto endjob;
         case VIR_DOMAIN_LIFECYCLE_ACTION_PRESERVE:
         case VIR_DOMAIN_LIFECYCLE_ACTION_COREDUMP_DESTROY:
         case VIR_DOMAIN_LIFECYCLE_ACTION_COREDUMP_RESTART:
@@ -531,26 +563,8 @@ libxlDomainShutdownThread(void *opaque)
          * Similar to the xl implementation, ignore SUSPEND.  Any actions needed
          * after calling libxl_domain_suspend() are handled by it's callers.
          */
-        goto endjob;
     } else {
         VIR_INFO("Unhandled shutdown_reason %d", xl_reason);
-        goto endjob;
-    }
-
- destroy:
-    libxlDomainDestroyInternal(driver, vm);
-    libxlDomainCleanup(driver, vm);
-    if (!vm->persistent)
-        virDomainObjListRemove(driver->domains, vm);
-
-    goto endjob;
-
- restart:
-    libxlDomainDestroyInternal(driver, vm);
-    libxlDomainCleanup(driver, vm);
-    if (libxlDomainStartNew(driver, vm, false) < 0) {
-        VIR_ERROR(_("Failed to restart VM '%s': %s"),
-                  vm->def->name, virGetLastErrorMessage());
     }
 
  endjob: