+ struct udev *udev = udev_device_get_udev(parent);
+ struct udev_device *transportdev;
+ struct udev_device *sessiondev = NULL;
+ const char *target;
+ char *connname;
+ struct udev_device *conndev = NULL;
+ const char *addr;
+ const char *port;
+
+ /* find iscsi session */
+ transportdev = parent;
+ while (1) {
+ transportdev = udev_device_get_parent(transportdev);
+ if (transportdev == NULL)
+ return NULL;
+ if (strncmp(udev_device_get_sysname(transportdev), "session", 7) == 0)
+ break;
+ }
+ if (transportdev == NULL)
+ return NULL;
+
+ /* find iscsi session device */
+ sessiondev = udev_device_new_from_subsystem_sysname(udev, "iscsi_session", udev_device_get_sysname(transportdev));
+ if (sessiondev == NULL)
+ return NULL;
+ target = udev_device_get_sysattr_value(sessiondev, "targetname");
+ if (target == NULL) {
+ parent = NULL;
+ goto out;
+ }
+
+ if (asprintf(&connname, "connection%s:0", udev_device_get_sysnum(transportdev)) < 0) {
+ parent = NULL;
+ goto out;
+ }
+ conndev = udev_device_new_from_subsystem_sysname(udev, "iscsi_connection", connname);
+ free(connname);
+ if (conndev == NULL) {
+ parent = NULL;
+ goto out;
+ }
+ addr = udev_device_get_sysattr_value(conndev, "persistent_address");
+ port = udev_device_get_sysattr_value(conndev, "persistent_port");
+ if (addr == NULL || port == NULL) {
+ parent = NULL;
+ goto out;
+ }
+
+ path_prepend(path, "ip-%s:%s-iscsi-%s-lun-%s", addr, port, target, udev_device_get_sysnum(parent));
+out:
+ udev_device_unref(sessiondev);
+ udev_device_unref(conndev);