vdev_file_t
vdev_file_t *vf = vd0->vdev_tsd;
vf = vd->vdev_tsd = kmem_zalloc(sizeof (vdev_file_t), KM_SLEEP);
vdev_file_t *vf = vd->vdev_tsd;
kmem_free(vf, sizeof (vdev_file_t));
vdev_file_t *vf = vd->vdev_tsd;
vdev_file_t *vf;