core: add and indicate NM_CAPABILITY_OVS capability on D-Bus

https://bugzilla.redhat.com/show_bug.cgi?id=1785147
(cherry picked from commit 785da51d83)

libnm-core/nm-dbus-interface.h

@@ -89,7 +89,10 @@
 
 /**
  * NMCapability:
- * @NM_CAPABILITY_TEAM: Teams can be managed
+ * @NM_CAPABILITY_TEAM: Teams can be managed. This means the team device plugin
+ *   is loaded.
+ * @NM_CAPABILITY_OVS: OpenVSwitch can be managed. This means the OVS device plugin
+ *   is loaded. Since: 1.24, 1.22.2
  *
  * #NMCapability names the numbers in the Capabilities property.
  * Capabilities are positive numbers. They are part of stable API
@@ -101,6 +104,7 @@
  */
 typedef enum {
 	NM_CAPABILITY_TEAM = 1,
+	NM_CAPABILITY_OVS  = 2,
 } NMCapability;
 
 /**

shared/nm-libnm-core-intern/nm-libnm-core-utils.h

@@ -95,4 +95,8 @@ nm_setting_ip_config_get_addr_family (NMSettingIPConfig *s_ip)
  * depends on other factors. */
 #define NM_INFINIBAND_MAX_MTU ((guint) 65520)
 
+/*****************************************************************************/
+
+#define _NM_CAPABILITY_MAX NM_CAPABILITY_OVS
+
 #endif /* __NM_LIBNM_SHARED_UTILS_H__ */

src/devices/ovs/nm-ovs-factory.c

@@ -59,6 +59,7 @@ NM_DEVICE_FACTORY_DECLARE_TYPES (
 G_MODULE_EXPORT NMDeviceFactory *
 nm_device_factory_create (GError **error)
 {
+	nm_manager_set_capability (NM_MANAGER_GET, NM_CAPABILITY_OVS);
 	return (NMDeviceFactory *) g_object_new (NM_TYPE_OVS_FACTORY, NULL);
 }
 

src/nm-manager.c

@@ -7357,7 +7357,7 @@ nm_manager_set_capability (NMManager *self,
 	gssize idx;
 
 	g_return_if_fail (NM_IS_MANAGER (self));
-	if (cap < 1 || cap > NM_CAPABILITY_TEAM)
+	if (cap < 1 || cap > _NM_CAPABILITY_MAX)
 		g_return_if_reached ();
 
 	cap_i = (guint32) cap;