qemu: Factor out body of qemuDomainSetMetadata for universal use

The function implemented common behavior that can be reused for other
hypervisor drivers that use the virDomainObj data structures. Factor out
the core into a separate helper func.

src/conf/domain_conf.c

@@ -18586,3 +18586,88 @@ virDomainObjGetMetadata(virDomainObjPtr vm,
 cleanup:
     return ret;
 }
+
+int
+virDomainObjSetMetadata(virDomainObjPtr vm,
+                        int type,
+                        const char *metadata,
+                        const char *key ATTRIBUTE_UNUSED,
+                        const char *uri ATTRIBUTE_UNUSED,
+                        virCapsPtr caps,
+                        virDomainXMLOptionPtr xmlopt,
+                        const char *configDir,
+                        unsigned int flags)
+{
+    virDomainDefPtr persistentDef;
+    int ret = -1;
+
+    virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
+                  VIR_DOMAIN_AFFECT_CONFIG, -1);
+
+    if (virDomainLiveConfigHelperMethod(caps, xmlopt, vm, &flags,
+                                        &persistentDef) < 0)
+        goto cleanup;
+
+    if (flags & VIR_DOMAIN_AFFECT_LIVE) {
+        switch ((virDomainMetadataType) type) {
+        case VIR_DOMAIN_METADATA_DESCRIPTION:
+            VIR_FREE(vm->def->description);
+            if (VIR_STRDUP(vm->def->description, metadata) < 0)
+                goto cleanup;
+            break;
+
+        case VIR_DOMAIN_METADATA_TITLE:
+            VIR_FREE(vm->def->title);
+            if (VIR_STRDUP(vm->def->title, metadata) < 0)
+                goto cleanup;
+            break;
+
+        case VIR_DOMAIN_METADATA_ELEMENT:
+            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
+                           _("<metadata> element is not supported"));
+            goto cleanup;
+            break;
+
+        default:
+            virReportError(VIR_ERR_INVALID_ARG, "%s",
+                           _("unknown metadata type"));
+            goto cleanup;
+            break;
+        }
+    }
+
+    if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
+        switch ((virDomainMetadataType) type) {
+        case VIR_DOMAIN_METADATA_DESCRIPTION:
+            VIR_FREE(persistentDef->description);
+            if (VIR_STRDUP(persistentDef->description, metadata) < 0)
+                goto cleanup;
+            break;
+
+        case VIR_DOMAIN_METADATA_TITLE:
+            VIR_FREE(persistentDef->title);
+            if (VIR_STRDUP(persistentDef->title, metadata) < 0)
+                goto cleanup;
+            break;
+
+        case VIR_DOMAIN_METADATA_ELEMENT:
+            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
+                           _("<metadata> element is not supported"));
+            goto cleanup;
+
+         default:
+            virReportError(VIR_ERR_INVALID_ARG, "%s",
+                           _("unknown metadata type"));
+            goto cleanup;
+            break;
+        }
+
+        if (virDomainSaveConfig(configDir, persistentDef) < 0)
+            goto cleanup;
+    }
+
+    ret = 0;
+
+cleanup:
+    return ret;
+}

src/conf/domain_conf.h

@@ -2745,4 +2745,14 @@ char *virDomainObjGetMetadata(virDomainObjPtr vm,
                               virDomainXMLOptionPtr xmlopt,
                               unsigned int flags);
 
+int virDomainObjSetMetadata(virDomainObjPtr vm,
+                            int type,
+                            const char *metadata,
+                            const char *key,
+                            const char *uri,
+                            virCapsPtr caps,
+                            virDomainXMLOptionPtr xmlopt,
+                            const char *configDir,
+                            unsigned int flags);
+
 #endif /* __DOMAIN_CONF_H */

src/libvirt_private.syms

@@ -327,6 +327,7 @@ virDomainObjListRemove;
 virDomainObjListRemoveLocked;
 virDomainObjNew;
 virDomainObjSetDefTransient;
+virDomainObjSetMetadata;
 virDomainObjSetState;
 virDomainObjTaint;
 virDomainPausedReasonTypeFromString;

src/qemu/qemu_driver.c

@@ -15022,22 +15022,21 @@ static int
 qemuDomainSetMetadata(virDomainPtr dom,
                       int type,
                       const char *metadata,
-                      const char *key ATTRIBUTE_UNUSED,
-                      const char *uri ATTRIBUTE_UNUSED,
+                      const char *key,
+                      const char *uri,
                       unsigned int flags)
 {
     virQEMUDriverPtr driver = dom->conn->privateData;
     virDomainObjPtr vm;
-    virDomainDefPtr persistentDef;
-    int ret = -1;
     virQEMUDriverConfigPtr cfg = NULL;
     virCapsPtr caps = NULL;
+    int ret = -1;
 
     virCheckFlags(VIR_DOMAIN_AFFECT_LIVE |
                   VIR_DOMAIN_AFFECT_CONFIG, -1);
 
     if (!(vm = qemuDomObjFromDomain(dom)))
-        goto cleanup;
+        return -1;
 
     cfg = virQEMUDriverGetConfig(driver);
 
@@ -15047,68 +15046,10 @@ qemuDomainSetMetadata(virDomainPtr dom,
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
         goto cleanup;
 
-    if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
-                                        &persistentDef) < 0)
-        goto cleanup;
-
-    if (flags & VIR_DOMAIN_AFFECT_LIVE) {
-        switch ((virDomainMetadataType) type) {
-        case VIR_DOMAIN_METADATA_DESCRIPTION:
-            VIR_FREE(vm->def->description);
-            if (VIR_STRDUP(vm->def->description, metadata) < 0)
-                goto cleanup;
-            break;
-        case VIR_DOMAIN_METADATA_TITLE:
-            VIR_FREE(vm->def->title);
-            if (VIR_STRDUP(vm->def->title, metadata) < 0)
-                goto cleanup;
-            break;
-        case VIR_DOMAIN_METADATA_ELEMENT:
-            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
-                           _("QEmu driver does not support modifying "
-                             "<metadata> element"));
-            goto cleanup;
-            break;
-        default:
-            virReportError(VIR_ERR_INVALID_ARG, "%s",
-                           _("unknown metadata type"));
-            goto cleanup;
-            break;
-        }
-    }
-
-    if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
-        switch ((virDomainMetadataType) type) {
-        case VIR_DOMAIN_METADATA_DESCRIPTION:
-            VIR_FREE(persistentDef->description);
-            if (VIR_STRDUP(persistentDef->description, metadata) < 0)
-                goto cleanup;
-            break;
-        case VIR_DOMAIN_METADATA_TITLE:
-            VIR_FREE(persistentDef->title);
-            if (VIR_STRDUP(persistentDef->title, metadata) < 0)
-                goto cleanup;
-            break;
-        case VIR_DOMAIN_METADATA_ELEMENT:
-            virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
-                           _("QEMU driver does not support "
-                             "<metadata> element"));
-            goto cleanup;
-         default:
-            virReportError(VIR_ERR_INVALID_ARG, "%s",
-                           _("unknown metadata type"));
-            goto cleanup;
-            break;
-        }
-
-        if (virDomainSaveConfig(cfg->configDir, persistentDef) < 0)
-            goto cleanup;
-    }
-
-    ret = 0;
+    ret = virDomainObjSetMetadata(vm, type, metadata, key, uri, caps,
+                                  driver->xmlopt, cfg->configDir, flags);
 
 cleanup:
-    if (vm)
     virObjectUnlock(vm);
     virObjectUnref(caps);
     virObjectUnref(cfg);