ISCSI_LOGIN_NEXT_STAGE
ISCSI_LOGIN_NEXT_STAGE(lh->flags);
ISCSI_LOGIN_NEXT_STAGE(lh_req->flags);
(ISCSI_LOGIN_NEXT_STAGE(lh_resp->flags) ==
(ISCSI_LOGIN_NEXT_STAGE(login_rsp->flags) ==
(ISCSI_LOGIN_NEXT_STAGE(flags) == \