qemu: Preserve fakeReboot flag in domain status

Thus, when libvirtd is restarted, it will know if a domain is supposed
to be killed or reset when it shuts down.

src/qemu/qemu_domain.c

@@ -302,6 +302,9 @@ static int qemuDomainObjPrivateXMLFormat(virBufferPtr buf, void *data)
         virBufferAddLit(buf, "/>\n");
     }
 
+    if (priv->fakeReboot)
+        virBufferAsprintf(buf, "  <fakereboot/>\n");
+
     return 0;
 }
 
@@ -445,6 +448,8 @@ static int qemuDomainObjPrivateXMLParse(xmlXPathContextPtr ctxt, void *data)
         }
     }
 
+    priv->fakeReboot = virXPathBoolean("boolean(./fakereboot)", ctxt) == 1;
+
     return 0;
 
 error:
@@ -1566,3 +1571,19 @@ qemuDomainRemoveInactive(struct qemud_driver *driver,
     }
     virDomainRemoveInactive(&driver->domains, vm);
 }
+
+void
+qemuDomainSetFakeReboot(struct qemud_driver *driver,
+                        virDomainObjPtr vm,
+                        bool value)
+{
+    qemuDomainObjPrivatePtr priv = vm->privateData;
+
+    if (priv->fakeReboot == value)
+        return;
+
+    priv->fakeReboot = value;
+
+    if (virDomainSaveStatus(driver->caps, driver->stateDir, vm) < 0)
+        VIR_WARN("Failed to save status on vm %s", vm->def->name);
+}

src/qemu/qemu_domain.h

@@ -273,4 +273,8 @@ int qemuDomainSnapshotDiscardAllMetadata(struct qemud_driver *driver,
 void qemuDomainRemoveInactive(struct qemud_driver *driver,
                               virDomainObjPtr vm);
 
+void qemuDomainSetFakeReboot(struct qemud_driver *driver,
+                             virDomainObjPtr vm,
+                             bool value);
+
 #endif /* __QEMU_DOMAIN_H__ */

src/qemu/qemu_driver.c

@@ -1512,13 +1512,13 @@ static int qemuDomainShutdown(virDomainPtr dom) {
         goto endjob;
     }
 
+    qemuDomainSetFakeReboot(driver, vm, false);
+
     priv = vm->privateData;
     qemuDomainObjEnterMonitor(driver, vm);
     ret = qemuMonitorSystemPowerdown(priv->mon);
     qemuDomainObjExitMonitor(driver, vm);
 
-    priv->fakeReboot = false;
-
 endjob:
     if (qemuDomainObjEndJob(driver, vm) == 0)
         vm = NULL;
@@ -1575,7 +1575,8 @@ static int qemuDomainReboot(virDomainPtr dom, unsigned int flags) {
         ret = qemuMonitorSystemPowerdown(priv->mon);
         qemuDomainObjExitMonitor(driver, vm);
 
-        priv->fakeReboot = true;
+        if (ret == 0)
+            qemuDomainSetFakeReboot(driver, vm, true);
 
     endjob:
         if (qemuDomainObjEndJob(driver, vm) == 0)
@@ -1616,7 +1617,6 @@ qemuDomainDestroyFlags(virDomainPtr dom,
     virDomainObjPtr vm;
     int ret = -1;
     virDomainEventPtr event = NULL;
-    qemuDomainObjPrivatePtr priv;
 
     virCheckFlags(0, -1);
 
@@ -1630,8 +1630,7 @@ qemuDomainDestroyFlags(virDomainPtr dom,
         goto cleanup;
     }
 
-    priv = vm->privateData;
-    priv->fakeReboot = false;
+    qemuDomainSetFakeReboot(driver, vm, false);
 
     /* Although qemuProcessStop does this already, there may
      * be an outstanding job active. We want to make sure we

src/qemu/qemu_process.c

@@ -442,7 +442,7 @@ qemuProcessShutdownOrReboot(virDomainObjPtr vm)
 
     priv->gotShutdown = true;
     if (priv->fakeReboot) {
-        priv->fakeReboot = false;
+        qemuDomainSetFakeReboot(qemu_driver, vm, false);
         virDomainObjRef(vm);
         virThread th;
         if (virThreadCreate(&th,
@@ -2846,7 +2846,7 @@ int qemuProcessStart(virConnectPtr conn,
         goto cleanup;
 
     vm->def->id = driver->nextvmid++;
-    priv->fakeReboot = false;
+    qemuDomainSetFakeReboot(driver, vm, false);
     virDomainObjSetState(vm, VIR_DOMAIN_SHUTOFF, VIR_DOMAIN_SHUTOFF_UNKNOWN);
 
     /* Run an early hook to set-up missing devices */