libnm: add nm_client_reload()

Introduce libnm API to reload NM configuration through the Reload()
D-Bus method.

libnm/libnm.ver

@@ -1631,6 +1631,8 @@ global:
 
 libnm_1_22_0 {
 global:
+	nm_client_reload;
+	nm_client_reload_finish;
 	nm_manager_reload_flags_get_type;
 	nm_setting_gsm_get_auto_config;
 } libnm_1_20_0;

libnm/nm-client.c

@@ -2737,6 +2737,88 @@ nm_client_checkpoint_adjust_rollback_timeout_finish (NMClient *client,
 	                                               error);
 }
 
+static void
+reload_cb (GObject *object,
+           GAsyncResult *result,
+           gpointer user_data)
+{
+	gs_unref_object GSimpleAsyncResult *simple = user_data;
+	GError *error = NULL;
+
+	if (nm_manager_reload_finish (NM_MANAGER (object), result, &error))
+		g_simple_async_result_set_op_res_gboolean (simple, TRUE);
+	else
+		g_simple_async_result_take_error (simple, error);
+
+	g_simple_async_result_complete (simple);
+}
+
+/**
+ * nm_client_reload:
+ * @client: the %NMClient
+ * @flags: flags indicating what to reload.
+ * @cancellable: a #GCancellable, or %NULL
+ * @callback: (scope async): callback to be called when the add operation completes
+ * @user_data: (closure): caller-specific data passed to @callback
+ *
+ * Reload NetworkManager's configuration and perform certain updates, like
+ * flushing caches or rewriting external state to disk. This is similar to
+ * sending SIGHUP to NetworkManager but it allows for more fine-grained control
+ * over what to reload (see @flags). It also allows non-root access via
+ * PolicyKit and contrary to signals it is synchronous.
+ *
+ * Since: 1.22
+ **/
+void
+nm_client_reload (NMClient *client,
+                  NMManagerReloadFlags flags,
+                  GCancellable *cancellable,
+                  GAsyncReadyCallback callback,
+                  gpointer user_data)
+{
+	GSimpleAsyncResult *simple;
+	GError *error = NULL;
+
+	g_return_if_fail (NM_IS_CLIENT (client));
+
+	if (!_nm_client_check_nm_running (client, &error)) {
+		g_simple_async_report_take_gerror_in_idle (G_OBJECT (client), callback, user_data, error);
+		return;
+	}
+
+	simple = g_simple_async_result_new (G_OBJECT (client), callback, user_data,
+	                                    nm_client_reload);
+	if (cancellable)
+		g_simple_async_result_set_check_cancellable (simple, cancellable);
+	nm_manager_reload (NM_CLIENT_GET_PRIVATE (client)->manager,
+	                   flags,
+	                   cancellable, reload_cb, simple);
+}
+
+/**
+ * nm_client_reload_finish:
+ * @client: an #NMClient
+ * @result: the result passed to the #GAsyncReadyCallback
+ * @error: location for a #GError, or %NULL
+ *
+ * Gets the result of a call to nm_client_reload().
+ *
+ * Returns: %TRUE on success or %FALSE on failure.
+ *
+ * Since: 1.22
+ **/
+gboolean
+nm_client_reload_finish (NMClient *client,
+                         GAsyncResult *result,
+                         GError **error)
+{
+	g_return_val_if_fail (NM_IS_CLIENT (client), FALSE);
+	g_return_val_if_fail (G_IS_SIMPLE_ASYNC_RESULT (result), FALSE);
+
+	return !g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result),
+	                                               error);
+}
+
 /****************************************************************/
 /* Object Initialization                                        */
 /****************************************************************/

libnm/nm-client.h

@@ -475,6 +475,17 @@ gboolean nm_client_checkpoint_adjust_rollback_timeout_finish (NMClient *client,
                                                               GAsyncResult *result,
                                                               GError **error);
 
+NM_AVAILABLE_IN_1_22
+void nm_client_reload (NMClient *client,
+                       NMManagerReloadFlags flags,
+                       GCancellable *cancellable,
+                       GAsyncReadyCallback callback,
+                       gpointer user_data);
+NM_AVAILABLE_IN_1_22
+gboolean nm_client_reload_finish (NMClient *client,
+                                  GAsyncResult *result,
+                                  GError **error);
+
 G_END_DECLS
 
 #endif /* __NM_CLIENT_H__ */

libnm/nm-manager.c

@@ -1684,6 +1684,64 @@ nm_manager_checkpoint_adjust_rollback_timeout_finish (NMManager *manager,
 	return !g_simple_async_result_propagate_error (simple, error);
 }
 
+static void
+reload_cb (GObject *object,
+           GAsyncResult *result,
+           gpointer user_data)
+{
+	gs_unref_object GSimpleAsyncResult *simple = user_data;
+	GError *error = NULL;
+
+	if (nmdbus_manager_call_reload_finish (NMDBUS_MANAGER (object),
+	                                       result,
+	                                       &error))
+		g_simple_async_result_set_op_res_gboolean (simple, TRUE);
+	else {
+		g_dbus_error_strip_remote_error (error);
+		g_simple_async_result_take_error (simple, error);
+	}
+	g_simple_async_result_complete (simple);
+}
+
+void
+nm_manager_reload (NMManager *manager,
+                   NMManagerReloadFlags flags,
+                   GCancellable *cancellable,
+                   GAsyncReadyCallback callback,
+                   gpointer user_data)
+{
+	GSimpleAsyncResult *simple;
+
+	g_return_if_fail (NM_IS_MANAGER (manager));
+
+	simple = g_simple_async_result_new (G_OBJECT (manager), callback, user_data,
+	                                    nm_manager_reload);
+	if (cancellable)
+		g_simple_async_result_set_check_cancellable (simple, cancellable);
+
+	nmdbus_manager_call_reload (NM_MANAGER_GET_PRIVATE (manager)->proxy,
+	                            flags,
+	                            cancellable,
+	                            reload_cb,
+	                            simple);
+
+}
+
+gboolean
+nm_manager_reload_finish (NMManager *manager,
+                          GAsyncResult *result,
+                          GError **error)
+{
+	GSimpleAsyncResult *simple;
+
+	g_return_val_if_fail (g_simple_async_result_is_valid (result, G_OBJECT (manager),
+	                                                      nm_manager_reload),
+	                      FALSE);
+
+	simple = G_SIMPLE_ASYNC_RESULT (result);
+	return !g_simple_async_result_propagate_error (simple, error);
+}
+
 /*****************************************************************************/
 
 static void

libnm/nm-manager.h

@@ -224,4 +224,13 @@ void _nm_activate_result_free (_NMActivateResult *result);
 
 /*****************************************************************************/
 
+void nm_manager_reload (NMManager *manager,
+                        NMManagerReloadFlags flags,
+                        GCancellable *cancellable,
+                        GAsyncReadyCallback callback,
+                        gpointer user_data);
+gboolean nm_manager_reload_finish (NMManager *manager,
+                                   GAsyncResult *result,
+                                   GError **error);
+
 #endif /* __NM_MANAGER_H__ */