core_tpg_alloc_lun
lun = core_tpg_alloc_lun(se_tpg, unpacked_lun);
struct se_lun *core_tpg_alloc_lun(struct se_portal_group *, u64);
se_tpg->tpg_virt_lun0 = core_tpg_alloc_lun(se_tpg, 0);