qemu: domain: Add helper for saving config XML

Similarly to qemuDomainSaveStatus add a helper to save the config XML
named qemuDomainSaveConfig.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

src/qemu/qemu_domain.c

@@ -7259,6 +7259,28 @@ qemuDomainSaveStatus(virDomainObjPtr obj)
 }
 
 
+void
+qemuDomainSaveConfig(virDomainObjPtr obj)
+{
+    virQEMUDriverPtr driver = QEMU_DOMAIN_PRIVATE(obj)->driver;
+    VIR_AUTOUNREF(virQEMUDriverConfigPtr) cfg = NULL;
+    virDomainDefPtr def = NULL;
+
+    if (virDomainObjIsActive(obj))
+        def = obj->newDef;
+    else
+        def = obj->def;
+
+    if (!def)
+        return;
+
+    cfg = virQEMUDriverGetConfig(driver);
+
+    if (virDomainSaveConfig(cfg->configDir, driver->caps, def) < 0)
+        VIR_WARN("Failed to save config of vm %s", obj->def->name);
+}
+
+
 void
 qemuDomainObjSetJobPhase(virQEMUDriverPtr driver,
                          virDomainObjPtr obj,

src/qemu/qemu_domain.h

@@ -207,6 +207,7 @@ typedef void (*qemuDomainCleanupCallback)(virQEMUDriverPtr driver,
 #define QEMU_DOMAIN_MASTER_KEY_LEN 32  /* 32 bytes for 256 bit random key */
 
 void qemuDomainSaveStatus(virDomainObjPtr obj);
+void qemuDomainSaveConfig(virDomainObjPtr obj);
 
 
 /* helper data types for async device unplug */