OS_BOOTONCE
if (zfs_get_bootonce(&currdev, OS_BOOTONCE, bootonce,
if (zfs_get_bootonce(bdev, OS_BOOTONCE, cmd,
rv = nvlist_lookup_string(nv, OS_BOOTONCE, &val);
if (nvlist_exists(nv, OS_BOOTONCE))
fnvlist_remove(nv, OS_BOOTONCE);
fnvlist_add_string(nv, OS_BOOTONCE, device);
fnvlist_add_string(nv, OS_BOOTONCE, descriptor);