core: add o.fd.NM.Settings.LoadConnections

Add a D-Bus method to reload connection files specified by
filename, and implement it in the ifcfg-rh and keyfile backends.

https://bugzilla.gnome.org/show_bug.cgi?id=709830

introspection/nm-settings.xml

@@ -82,6 +82,40 @@
       </arg>
     </method>
 
+    <method name="LoadConnections">
+      <tp:docstring>
+        Loads or reloads the indicated connections from disk. You
+        should call this after making changes directly to an on-disk
+        connection file to make sure that NetworkManager sees the
+        changes. (If "monitor-connection-files" in NetworkManager.conf
+        is "true", then this will have no real effect, but is
+        harmless.) As with AddConnection(), this operation does not
+        necessarily start the network connection.
+      </tp:docstring>
+      <annotation name="org.freedesktop.DBus.GLib.CSymbol" value="impl_settings_load_connections"/>
+      <annotation name="org.freedesktop.DBus.GLib.Async" value=""/>
+      <arg name="filenames" type="as" direction="in">
+        <tp:docstring>
+          Array of paths to on-disk connection profiles in directories
+          monitored by NetworkManager.
+        </tp:docstring>
+      </arg>
+      <arg name="status" type="b" direction="out">
+        <tp:docstring>
+          Success or failure of the operation as a whole. True if
+          NetworkManager at least tried to load the indicated
+          connections, even if it did not succeed. False if an error
+          occurred before trying to load the connections (eg,
+          permission denied).
+        </tp:docstring>
+      </arg>
+      <arg name="failures" type="as" direction="out">
+        <tp:docstring>
+          Paths of connection files that could not be loaded.
+        </tp:docstring>
+      </arg>
+    </method>
+
     <method name="ReloadConnections">
       <tp:docstring>
         Tells NetworkManager to reload all connection files from disk,

src/settings/nm-settings.c

@@ -104,6 +104,10 @@ static void impl_settings_add_connection_unsaved (NMSettings *self,
                                                   GHashTable *settings,
                                                   DBusGMethodInvocation *context);
 
+static void impl_settings_load_connections (NMSettings *self,
+                                            char **filenames,
+                                            DBusGMethodInvocation *context);
+
 static void impl_settings_reload_connections (NMSettings *self,
                                               DBusGMethodInvocation *context);
 
@@ -1223,22 +1227,20 @@ impl_settings_add_connection_unsaved (NMSettings *self,
 	impl_settings_add_connection_helper (self, settings, FALSE, context);
 }
 
-static void
-impl_settings_reload_connections (NMSettings *self,
-                                  DBusGMethodInvocation *context)
+static gboolean
+ensure_root (NMDBusManager         *dbus_mgr,
+             DBusGMethodInvocation *context)
 {
-	NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self);
-	GSList *iter;
 	gulong caller_uid;
 	GError *error = NULL;
 
-	if (!nm_dbus_manager_get_caller_info (priv->dbus_mgr, context, NULL, &caller_uid, NULL)) {
+	if (!nm_dbus_manager_get_caller_info (dbus_mgr, context, NULL, &caller_uid, NULL)) {
 		error = g_error_new_literal (NM_SETTINGS_ERROR,
 		                             NM_SETTINGS_ERROR_PERMISSION_DENIED,
 		                             "Unable to determine request UID.");
 		dbus_g_method_return_error (context, error);
 		g_error_free (error);
-		return;
+		return FALSE;
 	}
 	if (caller_uid != 0) {
 		error = g_error_new_literal (NM_SETTINGS_ERROR,
@@ -1246,9 +1248,57 @@ impl_settings_reload_connections (NMSettings *self,
 		                             "Permission denied");
 		dbus_g_method_return_error (context, error);
 		g_error_free (error);
-		return;
+		return FALSE;
 	}
 
+	return TRUE;
+}
+
+static void
+impl_settings_load_connections (NMSettings *self,
+                                char **filenames,
+                                DBusGMethodInvocation *context)
+{
+	NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self);
+	GPtrArray *failures;
+	GSList *iter;
+	int i;
+
+	if (!ensure_root (priv->dbus_mgr, context))
+		return;
+
+	failures = g_ptr_array_new ();
+
+	for (i = 0; filenames[i]; i++) {
+		for (iter = priv->plugins; iter; iter = g_slist_next (iter)) {
+			NMSystemConfigInterface *plugin = NM_SYSTEM_CONFIG_INTERFACE (iter->data);
+
+			if (nm_system_config_interface_load_connection (plugin, filenames[i]))
+				break;
+		}
+
+		if (!iter) {
+			if (!g_path_is_absolute (filenames[i]))
+				nm_log_warn (LOGD_SETTINGS, "Connection filename '%s' is not an absolute path", filenames[i]);
+			g_ptr_array_add (failures, (char *) filenames[i]);
+		}
+	}
+
+	g_ptr_array_add (failures, NULL);
+	dbus_g_method_return (context, failures->len == 1, failures->pdata);
+	g_ptr_array_unref (failures);
+}
+
+static void
+impl_settings_reload_connections (NMSettings *self,
+                                  DBusGMethodInvocation *context)
+{
+	NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self);
+	GSList *iter;
+
+	if (!ensure_root (priv->dbus_mgr, context))
+		return;
+
 	if (!priv->connections_loaded) {
 		load_connections (self);
 	} else {

src/settings/nm-system-config-interface.c

@@ -145,6 +145,17 @@ nm_system_config_interface_get_connections (NMSystemConfigInterface *config)
 	return NULL;
 }
 
+gboolean
+nm_system_config_interface_load_connection (NMSystemConfigInterface *config,
+                                            const char *filename)
+{
+	g_return_val_if_fail (config != NULL, NULL);
+
+	if (NM_SYSTEM_CONFIG_INTERFACE_GET_INTERFACE (config)->load_connection)
+		return NM_SYSTEM_CONFIG_INTERFACE_GET_INTERFACE (config)->load_connection (config, filename);
+	return FALSE;
+}
+
 void
 nm_system_config_interface_reload_connections (NMSystemConfigInterface *config)
 {

src/settings/nm-system-config-interface.h

@@ -90,6 +90,12 @@ struct _NMSystemConfigInterface {
 	 */
 	GSList * (*get_connections) (NMSystemConfigInterface *config);
 
+	/* Requests that the plugin load/reload a single connection, if it
+	 * recognizes the filename. Returns success or failure.
+	 */
+	gboolean (*load_connection) (NMSystemConfigInterface *config,
+	                             const char *filename);
+
 	/* Requests that the plugin reload all connection files from disk,
 	 * and emit signals reflecting new, changed, and removed connections.
 	 */
@@ -150,6 +156,8 @@ void nm_system_config_interface_init (NMSystemConfigInterface *config,
 
 GSList *nm_system_config_interface_get_connections (NMSystemConfigInterface *config);
 
+gboolean nm_system_config_interface_load_connection (NMSystemConfigInterface *config,
+                                                     const char *filename);
 void nm_system_config_interface_reload_connections (NMSystemConfigInterface *config);
 
 GSList *nm_system_config_interface_get_unmanaged_specs (NMSystemConfigInterface *config);

src/settings/plugins/ifcfg-rh/plugin.c

@@ -512,6 +512,30 @@ get_connections (NMSystemConfigInterface *config)
 	return list;
 }
 
+static gboolean
+load_connection (NMSystemConfigInterface *config,
+                 const char *filename)
+{
+	SCPluginIfcfg *plugin = SC_PLUGIN_IFCFG (config);
+	NMIfcfgConnection *connection;
+	int dir_len = strlen (IFCFG_DIR);
+
+	if (   strncmp (filename, IFCFG_DIR, dir_len) != 0
+	    || filename[dir_len] != '/'
+	    || strchr (filename + dir_len + 1, '/') != NULL)
+		return FALSE;
+
+	if (utils_should_ignore_file (filename + dir_len + 1, TRUE))
+		return FALSE;
+
+	connection = find_by_path (plugin, filename);
+	connection_new_or_changed (plugin, filename, connection, NULL);
+	if (!connection)
+		connection = find_by_path (plugin, filename);
+
+	return (connection != NULL);
+}
+
 static void
 reload_connections (NMSystemConfigInterface *config)
 {
@@ -968,6 +992,7 @@ system_config_interface_init (NMSystemConfigInterface *system_config_interface_c
 	/* interface implementation */
 	system_config_interface_class->get_connections = get_connections;
 	system_config_interface_class->add_connection = add_connection;
+	system_config_interface_class->load_connection = load_connection;
 	system_config_interface_class->reload_connections = reload_connections;
 	system_config_interface_class->get_unmanaged_specs = get_unmanaged_specs;
 	system_config_interface_class->get_unrecognized_specs = get_unrecognized_specs;

src/settings/plugins/keyfile/plugin.c

@@ -406,6 +406,33 @@ get_connections (NMSystemConfigInterface *config)
 	return list;
 }
 
+static gboolean
+load_connection (NMSystemConfigInterface *config,
+                 const char *filename)
+{
+	SCPluginKeyfile *self = SC_PLUGIN_KEYFILE (config);
+	NMKeyfileConnection *connection;
+	int dir_len = strlen (KEYFILE_DIR);
+
+	if (   strncmp (filename, KEYFILE_DIR, dir_len) != 0
+	    || filename[dir_len] != '/'
+	    || strchr (filename + dir_len + 1, '/') != NULL)
+		return FALSE;
+
+	if (nm_keyfile_plugin_utils_should_ignore_file (filename + dir_len + 1))
+		return FALSE;
+
+	connection = find_by_path (self, filename);
+	if (connection)
+		update_connection (self, connection, filename);
+	else {
+		new_connection (self, filename, NULL);
+		connection = find_by_path (self, filename);
+	}
+
+	return (connection != NULL);
+}
+
 static void
 reload_connections (NMSystemConfigInterface *config)
 {
@@ -705,6 +732,7 @@ system_config_interface_init (NMSystemConfigInterface *system_config_interface_c
 {
 	/* interface implementation */
 	system_config_interface_class->get_connections = get_connections;
+	system_config_interface_class->load_connection = load_connection;
 	system_config_interface_class->reload_connections = reload_connections;
 	system_config_interface_class->add_connection = add_connection;
 	system_config_interface_class->get_unmanaged_specs = get_unmanaged_specs;