Symbol: ZFS_ROOT_OBJ
stand/libsa/zfs/zfsimpl.c
3850
rc = zap_lookup(spa, &dn, ZFS_ROOT_OBJ, sizeof(objnum), 1, &objnum);
usr.sbin/makefs/zfs/fs.c
1046
zap_add_uint64(masterzap, ZFS_ROOT_OBJ, rootdirid);