ncl_doio
int ncl_doio(struct vnode *, struct buf *, struct ucred *, struct thread *,
error = ncl_doio(vp, bp, cred, td, 0);
error = ncl_doio(vp, bp, cred, td, 0);
error = ncl_doio(vp, bp, cred, td, 0);
error = ncl_doio(vp, bp, cred, td, 0);
error = ncl_doio(vp, bp, cred, td, 0);
(void) ncl_doio(bp->b_vp, bp, bp->b_rcred,
(void) ncl_doio(bp->b_vp, bp, bp->b_wcred,
(void) ncl_doio(vp, bp, cr, curthread, 1);