editor: use ifname instead of UUID in slaves' master property (rh #1083186)

NetworkManager accepts both UUID and interface name in slave's master property
(identifying master). UUID is easier to use in the editor and may be more
appropriate for 'connection based' configurations. On the other hand, some
users may expect master property to be rather interface name. And this is also
the only supported option for some legacy configurations, such as initscripts
in Red Hat based distros.

We only use interface name for newly added slaves to ensure we don't change
existing connections (which would be unexpected for users).

https://bugzilla.redhat.com/show_bug.cgi?id=1083186

src/connection-editor/ce-page.c

@@ -134,6 +134,18 @@ ce_page_validate (CEPage *self, NMConnection *connection, GError **error)
 	return TRUE;
 }
 
+gboolean
+ce_page_last_update (CEPage *self, NMConnection *connection, GError **error)
+{
+	g_return_val_if_fail (CE_IS_PAGE (self), FALSE);
+	g_return_val_if_fail (NM_IS_CONNECTION (connection), FALSE);
+
+	if (CE_PAGE_GET_CLASS (self)->last_update)
+		return CE_PAGE_GET_CLASS (self)->last_update (self, connection, error);
+
+	return TRUE;
+}
+
 char **
 ce_page_get_mac_list (CEPage *self, GType device_type, const char *mac_property)
 {

src/connection-editor/ce-page.h

@@ -79,6 +79,7 @@ typedef struct {
 
 	/* Virtual functions */
 	gboolean    (*validate)     (CEPage *self, NMConnection *connection, GError **error);
+	gboolean    (*last_update)  (CEPage *self, NMConnection *connection, GError **error);
 
 	/* Signals */
 	void        (*changed)     (CEPage *self);
@@ -100,6 +101,7 @@ GtkWidget *  ce_page_get_page (CEPage *self);
 const char * ce_page_get_title (CEPage *self);
 
 gboolean ce_page_validate (CEPage *self, NMConnection *connection, GError **error);
+gboolean ce_page_last_update (CEPage *self, NMConnection *connection, GError **error);
 
 char **ce_page_get_mac_list (CEPage *self, GType device_type, const char *mac_property);
 void ce_page_setup_mac_combo (CEPage *self, GtkComboBox *combo,

src/connection-editor/nm-connection-editor.c

@@ -957,6 +957,7 @@ static void
 ok_button_clicked_cb (GtkWidget *widget, gpointer user_data)
 {
 	NMConnectionEditor *self = NM_CONNECTION_EDITOR (user_data);
+	GSList *iter;
 
 	/* If the dialog is busy waiting for authorization or something,
 	 * don't destroy it until authorization returns.
@@ -967,6 +968,10 @@ ok_button_clicked_cb (GtkWidget *widget, gpointer user_data)
 	/* Validate one last time to ensure all pages update the connection */
 	connection_editor_validate (self);
 
+	/* Perform page specific actions before the connection is saved */
+	for (iter = self->pages; iter; iter = g_slist_next (iter))
+		ce_page_last_update (CE_PAGE (iter->data), self->connection, NULL);
+
 	ok_button_clicked_save_connection (self);
 }
 

src/connection-editor/page-master.c

@@ -44,6 +44,8 @@ typedef struct {
 	GtkTreeModel *connections_model;
 	GtkButton *add, *edit, *delete;
 
+	GHashTable *new_slaves;  /* track whether some slave(s) were added */
+
 } CEPageMasterPrivate;
 
 enum {
@@ -112,6 +114,8 @@ dispose (GObject *object)
 		} while (gtk_tree_model_iter_next (priv->connections_model, &iter));
 	}
 
+	g_hash_table_destroy (priv->new_slaves);
+
 	G_OBJECT_CLASS (ce_page_master_parent_class)->dispose (object);
 }
 
@@ -343,6 +347,14 @@ connections_selection_changed_cb (GtkTreeSelection *selection, gpointer user_dat
 static void
 add_response_cb (NMConnectionEditor *editor, GtkResponseType response, gpointer user_data)
 {
+	CEPageMaster *self = user_data;
+	CEPageMasterPrivate *priv = CE_PAGE_MASTER_GET_PRIVATE (self);
+	const char *uuid;
+
+	if (response == GTK_RESPONSE_OK) {
+		uuid = nm_connection_get_uuid (editor->connection);
+		g_hash_table_add (priv->new_slaves, g_strdup (uuid));
+	}
 	g_object_unref (editor);
 }
 
@@ -473,6 +485,20 @@ connection_double_clicked_cb (GtkTreeView *tree_view,
 	edit_clicked (NULL, user_data);
 }
 
+static void
+delete_result_cb (NMRemoteConnection *connection,
+                  gboolean deleted,
+                  gpointer user_data)
+{
+	CEPageMaster *self = user_data;
+	CEPageMasterPrivate *priv = CE_PAGE_MASTER_GET_PRIVATE (self);
+
+	if (deleted) {
+		g_hash_table_remove (priv->new_slaves,
+		                     nm_connection_get_uuid (NM_CONNECTION (connection)));
+	}
+}
+
 static void
 delete_clicked (GtkButton *button, gpointer user_data)
 {
@@ -484,7 +510,7 @@ delete_clicked (GtkButton *button, gpointer user_data)
 	if (!connection)
 		return;
 
-	delete_connection (priv->toplevel, connection, NULL, NULL);
+	delete_connection (priv->toplevel, connection, delete_result_cb, self);
 }
 
 static void
@@ -592,9 +618,52 @@ validate (CEPage *page, NMConnection *connection, GError **error)
 	return TRUE;
 }
 
+static gboolean
+last_update (CEPage *page, NMConnection *connection, GError **error)
+{
+	CEPageMaster *self = CE_PAGE_MASTER (page);
+	CEPageMasterPrivate *priv = CE_PAGE_MASTER_GET_PRIVATE (self);
+	const char *interface_name, *tmp, *uuid;
+	NMSettingConnection *s_con;
+	GtkTreeIter iter;
+
+	/* No new slave added - leave master property as it is. */
+	if (g_hash_table_size (priv->new_slaves) == 0)
+		return TRUE;
+
+	/*
+	 * Set master property of all slaves to be the interface name.
+	 * Even if UUID has the advantage of being stable and thus easier to use,
+	 * users may prefer using interface name instead.
+	*/
+	interface_name = gtk_entry_get_text (priv->interface_name);
+	if (gtk_tree_model_get_iter_first (priv->connections_model, &iter)) {
+		do {
+			NMRemoteConnection *rcon = NULL;
+
+			gtk_tree_model_get (priv->connections_model, &iter,
+			                    COL_CONNECTION, &rcon,
+			                    -1);
+			tmp = nm_connection_get_interface_name (NM_CONNECTION (rcon));
+			uuid = nm_connection_get_uuid (NM_CONNECTION (rcon));
+			if (   g_hash_table_contains (priv->new_slaves, uuid)
+			    && g_strcmp0 (interface_name, tmp) != 0) {
+				s_con = nm_connection_get_setting_connection (NM_CONNECTION (rcon));
+				g_object_set (s_con, NM_SETTING_CONNECTION_MASTER, interface_name, NULL);
+				nm_remote_connection_commit_changes_async (rcon, TRUE, NULL, NULL, NULL);
+			}
+			g_object_unref (rcon);
+		} while (gtk_tree_model_iter_next (priv->connections_model, &iter));
+	}
+	return TRUE;
+}
+
 static void
 ce_page_master_init (CEPageMaster *self)
 {
+	CEPageMasterPrivate *priv = CE_PAGE_MASTER_GET_PRIVATE (self);
+
+	priv->new_slaves = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
 }
 
 static void
@@ -610,6 +679,7 @@ ce_page_master_class_init (CEPageMasterClass *master_class)
 	object_class->dispose = dispose;
 
 	parent_class->validate = validate;
+	parent_class->last_update = last_update;
 
 	/* Signals */
 	signals[CREATE_CONNECTION] =