if (conn->hdrdgst_en) iscsi_hdr_digest(conn, &ctask->headbuf, (u8*)ctask->hdrext);
handle_xmstate_r_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask){	ctask->xmstate &= ~XMSTATE_R_HDR;	if (!iscsi_sendhdr(conn, &ctask->headbuf, 0)) {		BUG_ON(ctask->xmstate != XMSTATE_IDLE);		return 0; /* wait for Data-In */	}	ctask->xmstate |= XMSTATE_R_HDR;	return -EAGAIN;}