dirfs_node_refcnt
int dirfs_node_refcnt(dirfs_node_t);
KKASSERT(dirfs_node_refcnt(dnp) == 0);
dnp, dirfs_fd_used, dirfs_node_refcnt(dnp));
if (dirfs_node_refcnt(dnp) == 2 && vp &&
if (dirfs_node_refcnt(dnp) == 1 && dnp->dn_vnode == NULL &&