vdev_stat_ex_t
extern void vdev_get_stats_ex(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx);
vdev_stat_ex_t vdev_stat_ex; /* extended statistics */
vdev_get_child_stat_ex(vdev_t *cvd, vdev_stat_ex_t *vsx, vdev_stat_ex_t *cvsx)
vdev_get_stats_ex_impl(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx)
vdev_stat_ex_t *cvsx = &cvd->vdev_stat_ex;
vdev_get_stats_ex(vdev_t *vd, vdev_stat_t *vs, vdev_stat_ex_t *vsx)
vdev_stat_ex_t *vsx = &vd->vdev_stat_ex;
vdev_stat_ex_t *vsx;