core: expose accessors to NMManager in NMSettings, NMSettingsConnection, NMDevice

We should avoid using the NM_MANAGER_GET singleton. Everybody already
has a manager instance. Expose it and allow to use it.

src/core/devices/nm-device-private.h

@@ -29,10 +29,6 @@ enum NMActStageReturn {
 
 #define NM_DEVICE_CAP_INTERNAL_MASK 0xc0000000
 
-NMSettings *nm_device_get_settings(NMDevice *self);
-
-NMManager *nm_device_get_manager(NMDevice *self);
-
 gboolean nm_device_set_ip_ifindex(NMDevice *self, int ifindex);
 
 gboolean nm_device_set_ip_iface(NMDevice *self, const char *iface);

src/core/devices/nm-device.h

@@ -421,6 +421,10 @@ typedef struct _NMDeviceClass {
     const char *(*get_dhcp_anycast_address)(NMDevice *self);
 } NMDeviceClass;
 
+NMSettings *nm_device_get_settings(NMDevice *self);
+
+NMManager *nm_device_get_manager(NMDevice *self);
+
 GType nm_device_get_type(void);
 
 struct _NMDedupMultiIndex *nm_device_get_multi_index(NMDevice *self);

src/core/settings/nm-settings-connection.c

@@ -227,6 +227,22 @@ static guint _get_seen_bssids(NMSettingsConnection *self,
 
 /*****************************************************************************/
 
+NMSettings *
+nm_settings_connection_get_settings(NMSettingsConnection *self)
+{
+    g_return_val_if_fail(NM_IS_SETTINGS_CONNECTION(self), NULL);
+
+    return NM_SETTINGS_CONNECTION_GET_PRIVATE(self)->settings;
+}
+
+NMManager *
+nm_settings_connection_get_manager(NMSettingsConnection *self)
+{
+    return nm_settings_get_manager(nm_settings_connection_get_settings(self));
+}
+
+/*****************************************************************************/
+
 NMDevice *
 nm_settings_connection_default_wired_get_device(NMSettingsConnection *self)
 {

src/core/settings/nm-settings-connection.h

@@ -217,6 +217,10 @@ GType nm_settings_connection_get_type(void);
 
 NMSettingsConnection *nm_settings_connection_new(void);
 
+NMSettings *nm_settings_connection_get_settings(NMSettingsConnection *self);
+
+NMManager *nm_settings_connection_get_manager(NMSettingsConnection *self);
+
 NMConnection *nm_settings_connection_get_connection(NMSettingsConnection *self);
 
 void _nm_settings_connection_set_connection(NMSettingsConnection            *self,

src/core/settings/nm-settings.c

@@ -451,6 +451,16 @@ static void _startup_complete_check(NMSettings *self, gint64 now_msec);
 
 /*****************************************************************************/
 
+NMManager *
+nm_settings_get_manager(NMSettings *self)
+{
+    g_return_val_if_fail(NM_IS_SETTINGS(self), NULL);
+
+    return NM_SETTINGS_GET_PRIVATE(self)->manager;
+}
+
+/*****************************************************************************/
+
 static void
 _emit_connection_added(NMSettings *self, NMSettingsConnection *sett_conn)
 {

src/core/settings/nm-settings.h

@@ -58,6 +58,8 @@ NMSettings *nm_settings_get(void);
 
 NMSettings *nm_settings_new(NMManager *manager);
 
+NMManager *nm_settings_get_manager(NMSettings *self);
+
 gboolean nm_settings_start(NMSettings *self, GError **error);
 
 typedef void (*NMSettingsAddCallback)(NMSettings            *settings,