+ /* handle CDROM eject requests */
+ if (udev_device_get_property_value(dev, "DISK_EJECT_REQUEST")) {
+ pb_debug("udev: eject request\n");
+
+ /* If the device is mounted, cdrom_id's own eject request may
+ * have failed. So, we'll need to do our own here.
+ */
+ if (ddev) {
+ eject = ddev->mounted;
+ udev_handle_dev_remove(udev, dev);
+ }
+
+ if (eject)
+ cdrom_eject(node);
+
+ return true;
+ }
+
+ if (udev_device_get_property_value(dev, "DISK_MEDIA_CHANGE")) {
+ if (cdrom_media_present(node))
+ udev_handle_dev_add(udev, dev);
+ else
+ udev_handle_dev_remove(udev, dev);
+ return true;
+ }
+
+ return false;
+}
+
+static int udev_handle_dev_change(struct pb_udev *udev, struct udev_device *dev)
+{
+ struct discover_device *ddev;
+ const char *subsys;
+ const char *name;
+ int rc = 0;
+
+ name = udev_device_get_sysname(dev);
+ subsys = udev_device_get_subsystem(dev);
+
+ /* If we see a net device, check if it is ready to be used */
+ if (!strncmp(subsys, "net", strlen("net")))
+ return udev_check_interface_ready(udev->handler, dev);
+
+ ddev = device_lookup_by_id(udev->handler, name);
+
+ /* if this is a CDROM device, process eject & media change requests;
+ * these may stop further processing */
+ if (!udev_device_get_property_value(dev, "ID_CDROM")) {
+ if (udev_handle_cdrom_events(udev, dev, ddev))
+ return 0;
+ }
+
+ /* if this is a new device, treat it as an add */
+ if (!ddev)
+ rc = udev_handle_dev_add(udev, dev);
+
+ return rc;
+}
+
+static int udev_handle_dev_action(struct udev_device *dev, const char *action)
+{
+ struct pb_udev *udev = udev_get_userdata(udev_device_get_udev(dev));
+ struct udev_list_entry *list;
+ const char *name;
+
+ list = udev_device_get_properties_list_entry(dev);
+ name = udev_device_get_sysname(dev);
+
+ pb_debug("udev: action %s, device %s\n", action, name);
+ pb_debug("udev: properties:\n");
+
+ for (; list; list = udev_list_entry_get_next(list))
+ pb_debug("\t%-20s: %s\n", udev_list_entry_get_name(list),
+ udev_list_entry_get_value(list));
+
+ if (!strcmp(action, "add"))
+ return udev_handle_dev_add(udev, dev);
+
+ else if (!strcmp(action, "remove"))
+ return udev_handle_dev_remove(udev, dev);
+
+ else if (!strcmp(action, "change"))
+ return udev_handle_dev_change(udev, dev);