ceph_cls_lock
ret = ceph_cls_lock(osdc, &oid, &rbd_dev->header_oloc, RBD_LOCK_NAME,
ret = ceph_cls_lock(osdc, &rbd_dev->header_oid, &rbd_dev->header_oloc,
int ceph_cls_lock(struct ceph_osd_client *osdc,
EXPORT_SYMBOL(ceph_cls_lock);