tree a2a16f24b4ddf730ab97e385d6f8cd32163a39c1
parent 47d902b90a32a42a3d33aef3a02170fc6f70aa23
author Josef Bacik <josef@toxicpanda.com> 1491512526 -0400
committer Jens Axboe <axboe@fb.com> 1492444722 -0600

nbd: add device refcounting

In order to support deleting the device on disconnect we need to
refcount the actual nbd_device struct.  So add the refcounting framework
and change how we free the normal devices at rmmod time so we can catch
reference leaks.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>