The following patches made over linus's current tree (also apply over Martin's 5.9 scsi queue branch) add a configfs interface to export LIO's sessions. With Hannes not liking the refcounting/tricks in the sysfs approach I took another stab at configfs. This approach works similar to the loop/vhost/usb/xen nexus interface where there is a special file that allows userspace to add/remove sessions. Because the kernel is making sessions for most drivers, we do not have mkdir/rmdir support for the session dir, but using the special file approach we can still remove children session in the correct order and avoid the issues I hit before. The interface is a little odd configfs wise because we use the special file, but it has the benefit everything is in the one interface so it's easy to update the tools. If this approach is preferred over the sysfs one then I can repost with some other fixes, the transport id patches and the iscsi conversion one.
