zpool_get_handle
if ((cbp->cb_vdev = find_vdev(zpool_get_handle(zhp), nvroot,
zpool_explain_recover(zpool_get_handle(zhp),
zpool_explain_recover(zpool_get_handle(zhp),
extern libzfs_handle_t *zpool_get_handle(zpool_handle_t *);
libzfs_handle_t *hdl = zpool_get_handle(zhp);