133 	const unsigned int lss = icsk->icsk_ack.last_seg_size;  in tcp_measure_rcv_mss()
136 	icsk->icsk_ack.last_seg_size = 0;  in tcp_measure_rcv_mss()
142 	if (len >= icsk->icsk_ack.rcv_mss) {  in tcp_measure_rcv_mss()
143 		icsk->icsk_ack.rcv_mss = len;  in tcp_measure_rcv_mss()
164 			icsk->icsk_ack.last_seg_size = len;  in tcp_measure_rcv_mss()
166 				icsk->icsk_ack.rcv_mss = len;  in tcp_measure_rcv_mss()
170 		if (icsk->icsk_ack.pending & ICSK_ACK_PUSHED)  in tcp_measure_rcv_mss()
171 			icsk->icsk_ack.pending |= ICSK_ACK_PUSHED2;  in tcp_measure_rcv_mss()
172 		icsk->icsk_ack.pending |= ICSK_ACK_PUSHED;  in tcp_measure_rcv_mss()
179 	unsigned int quickacks = tcp_sk(sk)->rcv_wnd / (2 * icsk->icsk_ack.rcv_mss);  in tcp_incr_quickack()
183 	if (quickacks > icsk->icsk_ack.quick)  in tcp_incr_quickack()
184 		icsk->icsk_ack.quick = min(quickacks, TCP_MAX_QUICKACKS);  in tcp_incr_quickack()
191 	icsk->icsk_ack.pingpong = 0;  in tcp_enter_quickack_mode()
192 	icsk->icsk_ack.ato = TCP_ATO_MIN;  in tcp_enter_quickack_mode()
203 	return icsk->icsk_ack.quick && !icsk->icsk_ack.pingpong;  in tcp_in_quickack_mode()
347 			return 2 * inet_csk(sk)->icsk_ack.rcv_mss;  in __tcp_grow_window()
377 			inet_csk(sk)->icsk_ack.quick |= 1;  in tcp_grow_window()
445 	icsk->icsk_ack.quick = 0;  in tcp_clamp_window()
474 	inet_csk(sk)->icsk_ack.rcv_mss = hint;  in tcp_initialize_rcv_mss()
544 	     TCP_SKB_CB(skb)->seq >= inet_csk(sk)->icsk_ack.rcv_mss))  in tcp_rcv_rtt_measure_ts()
642 	if (!icsk->icsk_ack.ato) {  in tcp_event_data_recv()
647 		icsk->icsk_ack.ato = TCP_ATO_MIN;  in tcp_event_data_recv()
649 		int m = now - icsk->icsk_ack.lrcvtime;  in tcp_event_data_recv()
653 			icsk->icsk_ack.ato = (icsk->icsk_ack.ato >> 1) + TCP_ATO_MIN / 2;  in tcp_event_data_recv()
654 		} else if (m < icsk->icsk_ack.ato) {  in tcp_event_data_recv()
655 			icsk->icsk_ack.ato = (icsk->icsk_ack.ato >> 1) + m;  in tcp_event_data_recv()
656 			if (icsk->icsk_ack.ato > icsk->icsk_rto)  in tcp_event_data_recv()
657 				icsk->icsk_ack.ato = icsk->icsk_rto;  in tcp_event_data_recv()
666 	icsk->icsk_ack.lrcvtime = now;  in tcp_event_data_recv()
3968 			inet_csk(sk)->icsk_ack.pingpong = 1;  in tcp_fin()
4552 				inet_csk(sk)->icsk_ack.pingpong = 0;  in tcp_data_queue()
4909 	if (((tp->rcv_nxt - tp->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss &&  in __tcp_ack_snd_check()
5584 		    icsk->icsk_ack.pingpong) {  in tcp_rcv_synsent_state_process()
5593 			icsk->icsk_ack.lrcvtime = tcp_time_stamp;  in tcp_rcv_synsent_state_process()