vop_reallocblks
.vop_reallocblks = (void *)vop_eopnotsupp,
DO_OPS(ops, error, &ap, vop_reallocblks);
DO_OPS(ap->a_head.a_ops, error, ap, vop_reallocblks);
vop_reallocblks(*(vp)->v_ops, vp, buflist)
int (*vop_reallocblks)(struct vop_reallocblks_args *);
int vop_reallocblks(struct vop_ops *ops, struct vnode *vp,
.vop_reallocblks = DEVFS_BADOP,
.vop_reallocblks = DEVFS_BADOP,
.vop_reallocblks = ext2_reallocblks,
.vop_reallocblks = (void *)fifo_badop,
.vop_reallocblks = ffs_reallocblks,
.vop_reallocblks = (void *)ufs_missingop,