135 	const unsigned int lss = icsk->icsk_ack.last_seg_size;  in tcp_measure_rcv_mss()
138 	icsk->icsk_ack.last_seg_size = 0;  in tcp_measure_rcv_mss()
144 	if (len >= icsk->icsk_ack.rcv_mss) {  in tcp_measure_rcv_mss()
145 		icsk->icsk_ack.rcv_mss = len;  in tcp_measure_rcv_mss()
166 			icsk->icsk_ack.last_seg_size = len;  in tcp_measure_rcv_mss()
168 				icsk->icsk_ack.rcv_mss = len;  in tcp_measure_rcv_mss()
172 		if (icsk->icsk_ack.pending & ICSK_ACK_PUSHED)  in tcp_measure_rcv_mss()
173 			icsk->icsk_ack.pending |= ICSK_ACK_PUSHED2;  in tcp_measure_rcv_mss()
174 		icsk->icsk_ack.pending |= ICSK_ACK_PUSHED;  in tcp_measure_rcv_mss()
181 	unsigned int quickacks = tcp_sk(sk)->rcv_wnd / (2 * icsk->icsk_ack.rcv_mss);  in tcp_incr_quickack()
185 	if (quickacks > icsk->icsk_ack.quick)  in tcp_incr_quickack()
186 		icsk->icsk_ack.quick = min(quickacks, TCP_MAX_QUICKACKS);  in tcp_incr_quickack()
193 	icsk->icsk_ack.pingpong = 0;  in tcp_enter_quickack_mode()
194 	icsk->icsk_ack.ato = TCP_ATO_MIN;  in tcp_enter_quickack_mode()
207 		(icsk->icsk_ack.quick && !icsk->icsk_ack.pingpong);  in tcp_in_quickack_mode()
351 			return 2 * inet_csk(sk)->icsk_ack.rcv_mss;  in __tcp_grow_window()
381 			inet_csk(sk)->icsk_ack.quick |= 1;  in tcp_grow_window()
449 	icsk->icsk_ack.quick = 0;  in tcp_clamp_window()
478 	inet_csk(sk)->icsk_ack.rcv_mss = hint;  in tcp_initialize_rcv_mss()
548 	     TCP_SKB_CB(skb)->seq >= inet_csk(sk)->icsk_ack.rcv_mss))  in tcp_rcv_rtt_measure_ts()
646 	if (!icsk->icsk_ack.ato) {  in tcp_event_data_recv()
651 		icsk->icsk_ack.ato = TCP_ATO_MIN;  in tcp_event_data_recv()
653 		int m = now - icsk->icsk_ack.lrcvtime;  in tcp_event_data_recv()
657 			icsk->icsk_ack.ato = (icsk->icsk_ack.ato >> 1) + TCP_ATO_MIN / 2;  in tcp_event_data_recv()
658 		} else if (m < icsk->icsk_ack.ato) {  in tcp_event_data_recv()
659 			icsk->icsk_ack.ato = (icsk->icsk_ack.ato >> 1) + m;  in tcp_event_data_recv()
660 			if (icsk->icsk_ack.ato > icsk->icsk_rto)  in tcp_event_data_recv()
661 				icsk->icsk_ack.ato = icsk->icsk_rto;  in tcp_event_data_recv()
670 	icsk->icsk_ack.lrcvtime = now;  in tcp_event_data_recv()
4014 		inet_csk(sk)->icsk_ack.pingpong = 1;  in tcp_fin()
4600 				inet_csk(sk)->icsk_ack.pingpong = 0;  in tcp_data_queue()
4957 	if (((tp->rcv_nxt - tp->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss &&  in __tcp_ack_snd_check()
5632 		    icsk->icsk_ack.pingpong) {  in tcp_rcv_synsent_state_process()
5641 			icsk->icsk_ack.lrcvtime = tcp_time_stamp;  in tcp_rcv_synsent_state_process()