team: get configuration only when teamd appears on bus for externally added interfaces

teamd first adds the link and only then listens on the bus therefore we race
with it. Let's watch for the bus presence even for the teamd devices we didn't
add for all their lifetime and recheck for assumed connections as we see them.

src/devices/team/nm-device-team.c

@@ -169,6 +169,7 @@ update_connection (NMDevice *device, NMConnection *connection)
 {
 	NMDeviceTeam *self = NM_DEVICE_TEAM (device);
 	NMSettingTeam *s_team = nm_connection_get_setting_team (connection);
+	NMDeviceTeamPrivate *priv = NM_DEVICE_TEAM_GET_PRIVATE (self);
 
 	if (!s_team) {
 		s_team = (NMSettingTeam *) nm_setting_team_new ();
@@ -176,7 +177,7 @@ update_connection (NMDevice *device, NMConnection *connection)
 	}
 	g_object_set (G_OBJECT (s_team), NM_SETTING_TEAM_CONFIG, NULL, NULL);
 
-	if (ensure_teamd_connection (device)) {
+	if (priv->tdc) {
 		const char *config = NULL;
 		int err;
 
@@ -273,11 +274,6 @@ teamd_cleanup (NMDevice *device, gboolean device_state_failed)
 {
 	NMDeviceTeamPrivate *priv = NM_DEVICE_TEAM_GET_PRIVATE (device);
 
-	if (priv->teamd_dbus_watch) {
-		g_bus_unwatch_name (priv->teamd_dbus_watch);
-		priv->teamd_dbus_watch = 0;
-	}
-
 	if (priv->teamd_process_watch) {
 		g_source_remove (priv->teamd_process_watch);
 		priv->teamd_process_watch = 0;
@@ -333,6 +329,7 @@ teamd_dbus_appeared (GDBusConnection *connection,
 
 	_LOGI (LOGD_TEAM, "teamd appeared on D-Bus");
 	teamd_timeout_remove (device);
+	nm_device_queue_recheck_assume (device);
 
 	success = ensure_teamd_connection (device);
 	if (nm_device_get_state (device) == NM_DEVICE_STATE_PREPARE) {
@@ -355,7 +352,7 @@ teamd_dbus_vanished (GDBusConnection *connection,
 
 	g_return_if_fail (priv->teamd_dbus_watch);
 
-	if (priv->teamd_timeout) {
+	if (!priv->teamd_pid) {
 		/* g_bus_watch_name will always raise an initial signal, to indicate whether the
 		 * name exists/not exists initially. Do not take this as a failure, until the
 		 * startup timeout is over.
@@ -363,7 +360,7 @@ teamd_dbus_vanished (GDBusConnection *connection,
 		 * Note that g_bus_watch_name is guaranteed to alternate vanished/appeared signals,
 		 * so we won't hit this condition again (because the next signal is either 'appeared'
 		 * or 'timeout'). */
-		_LOGD (LOGD_TEAM, "teamd vanished from D-Bus (ignored)");
+		_LOGD (LOGD_TEAM, "teamd not on D-Bus (ignored)");
 		return;
 	}
 
@@ -403,6 +400,25 @@ teamd_child_setup (gpointer user_data G_GNUC_UNUSED)
 	nm_unblock_posix_signals (NULL);
 }
 
+static void
+nm_device_team_watch_dbus (NMDeviceTeam *self)
+{
+	NMDeviceTeamPrivate *priv = NM_DEVICE_TEAM_GET_PRIVATE (self);
+	const char *iface = nm_device_get_ip_iface (NM_DEVICE (self));
+	char *tmp_str = NULL;
+
+	/* Register D-Bus name watcher */
+	tmp_str = g_strdup_printf ("org.libteam.teamd.%s", iface);
+	priv->teamd_dbus_watch = g_bus_watch_name (G_BUS_TYPE_SYSTEM,
+	                                           tmp_str,
+	                                           G_BUS_NAME_WATCHER_FLAGS_NONE,
+	                                           teamd_dbus_appeared,
+	                                           teamd_dbus_vanished,
+	                                           NM_DEVICE (self),
+	                                           NULL);
+	g_free (tmp_str);
+}
+
 static gboolean
 teamd_start (NMDevice *device, NMSettingTeam *s_team)
 {
@@ -417,8 +433,7 @@ teamd_start (NMDevice *device, NMSettingTeam *s_team)
 	gboolean ret;
 	int status;
 
-	if (priv->teamd_dbus_watch ||
+	if (priv->teamd_process_watch ||
-	    priv->teamd_process_watch ||
 	    priv->teamd_pid > 0 ||
 	    priv->tdc ||
 	    priv->teamd_timeout)
@@ -477,17 +492,6 @@ teamd_start (NMDevice *device, NMSettingTeam *s_team)
 	/* Start a timeout for teamd to appear at D-Bus */
 	priv->teamd_timeout = g_timeout_add_seconds (5, teamd_timeout_cb, device);
 
-	/* Register D-Bus name watcher */
-	tmp_str = g_strdup_printf ("org.libteam.teamd.%s", iface);
-	priv->teamd_dbus_watch = g_bus_watch_name (G_BUS_TYPE_SYSTEM,
-	                                           tmp_str,
-	                                           G_BUS_NAME_WATCHER_FLAGS_NONE,
-	                                           teamd_dbus_appeared,
-	                                           teamd_dbus_vanished,
-	                                           device,
-	                                           NULL);
-	g_free (tmp_str);
-
 	ret = g_spawn_async ("/", (char **) argv->pdata, NULL, G_SPAWN_DO_NOT_REAP_CHILD,
 	                    &teamd_child_setup, NULL, &priv->teamd_pid, &error);
 	g_ptr_array_free (argv, TRUE);
@@ -691,6 +695,16 @@ nm_device_team_init (NMDeviceTeam * self)
 {
 }
 
+static void
+constructed (GObject *object)
+{
+	NMDeviceTeam *self = NM_DEVICE_TEAM (object);
+
+	G_OBJECT_CLASS (nm_device_team_parent_class)->constructed (object);
+
+	nm_device_team_watch_dbus (self);
+}
+
 static void
 get_property (GObject *object, guint prop_id,
               GValue *value, GParamSpec *pspec)
@@ -728,6 +742,14 @@ set_property (GObject *object, guint prop_id,
 static void
 dispose (GObject *object)
 {
+	NMDeviceTeam *self = NM_DEVICE_TEAM (object);
+	NMDeviceTeamPrivate *priv = NM_DEVICE_TEAM_GET_PRIVATE (self);
+
+	if (priv->teamd_dbus_watch) {
+		g_bus_unwatch_name (priv->teamd_dbus_watch);
+		priv->teamd_dbus_watch = 0;
+	}
+
 	teamd_cleanup (NM_DEVICE (object), FALSE);
 
 	G_OBJECT_CLASS (nm_device_team_parent_class)->dispose (object);
@@ -744,6 +766,7 @@ nm_device_team_class_init (NMDeviceTeamClass *klass)
 	parent_class->connection_type = NM_SETTING_TEAM_SETTING_NAME;
 
 	/* virtual methods */
+	object_class->constructed = constructed;
 	object_class->get_property = get_property;
 	object_class->set_property = set_property;
 	object_class->dispose = dispose;