ZFS_IOC_USERSPACE_UPGRADE
{ (uint_t)ZFS_IOC_USERSPACE_UPGRADE, "ZFS_IOC_USERSPACE_UPGRADE",
error = ioctl(zfsdevfd, ZFS_IOC_USERSPACE_UPGRADE, &zc);
CHECK(ZFS_IOC_BASE + 47 == ZFS_IOC_USERSPACE_UPGRADE);
ZFS_IOC_USERSPACE_UPGRADE,
zfs_ioctl_register_dataset_nolog(ZFS_IOC_USERSPACE_UPGRADE,