227 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_measure_rcv_mss()  local
228 	const unsigned int lss = icsk->icsk_ack.last_seg_size;  in tcp_measure_rcv_mss()
231 	icsk->icsk_ack.last_seg_size = 0;  in tcp_measure_rcv_mss()
237 	if (len >= icsk->icsk_ack.rcv_mss) {  in tcp_measure_rcv_mss()
242 		if (unlikely(len != icsk->icsk_ack.rcv_mss)) {  in tcp_measure_rcv_mss()
259 		icsk->icsk_ack.rcv_mss = min_t(unsigned int, len,  in tcp_measure_rcv_mss()
262 		DO_ONCE_LITE_IF(len > icsk->icsk_ack.rcv_mss + MAX_TCP_OPTION_SPACE,  in tcp_measure_rcv_mss()
276 			icsk->icsk_ack.pending |= ICSK_ACK_PUSHED;  in tcp_measure_rcv_mss()
297 			icsk->icsk_ack.last_seg_size = len;  in tcp_measure_rcv_mss()
299 				icsk->icsk_ack.rcv_mss = len;  in tcp_measure_rcv_mss()
303 		if (icsk->icsk_ack.pending & ICSK_ACK_PUSHED)  in tcp_measure_rcv_mss()
304 			icsk->icsk_ack.pending |= ICSK_ACK_PUSHED2;  in tcp_measure_rcv_mss()
305 		icsk->icsk_ack.pending |= ICSK_ACK_PUSHED;  in tcp_measure_rcv_mss()
311 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_incr_quickack()  local
312 	unsigned int quickacks = tcp_sk(sk)->rcv_wnd / (2 * icsk->icsk_ack.rcv_mss);  in tcp_incr_quickack()
317 	if (quickacks > icsk->icsk_ack.quick)  in tcp_incr_quickack()
318 		icsk->icsk_ack.quick = quickacks;  in tcp_incr_quickack()
323 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_enter_quickack_mode()  local
327 	icsk->icsk_ack.ato = TCP_ATO_MIN;  in tcp_enter_quickack_mode()
336 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_in_quickack_mode()  local
338 	return icsk->icsk_ack.dst_quick_ack ||  in tcp_in_quickack_mode()
339 		(icsk->icsk_ack.quick && !inet_csk_in_pingpong_mode(sk));  in tcp_in_quickack_mode()
616 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_clamp_window()  local
620 	icsk->icsk_ack.quick = 0;  in tcp_clamp_window()
816 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_save_lrcv_flowlabel()  local
819 		icsk->icsk_ack.lrcv_flowlabel = ntohl(ip6_flowlabel(ipv6_hdr(skb)));  in tcp_save_lrcv_flowlabel()
836 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_event_data_recv()  local
847 	if (!icsk->icsk_ack.ato) {  in tcp_event_data_recv()
852 		icsk->icsk_ack.ato = TCP_ATO_MIN;  in tcp_event_data_recv()
854 		int m = now - icsk->icsk_ack.lrcvtime;  in tcp_event_data_recv()
858 			icsk->icsk_ack.ato = (icsk->icsk_ack.ato >> 1) + TCP_ATO_MIN / 2;  in tcp_event_data_recv()
859 		} else if (m < icsk->icsk_ack.ato) {  in tcp_event_data_recv()
860 			icsk->icsk_ack.ato = (icsk->icsk_ack.ato >> 1) + m;  in tcp_event_data_recv()
861 			if (icsk->icsk_ack.ato > icsk->icsk_rto)  in tcp_event_data_recv()
862 				icsk->icsk_ack.ato = icsk->icsk_rto;  in tcp_event_data_recv()
863 		} else if (m > icsk->icsk_rto) {  in tcp_event_data_recv()
870 	icsk->icsk_ack.lrcvtime = now;  in tcp_event_data_recv()
2202 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_enter_loss()  local
2205 	bool new_recovery = icsk->icsk_ca_state < TCP_CA_Recovery;  in tcp_enter_loss()
2211 	if (icsk->icsk_ca_state <= TCP_CA_Disorder ||  in tcp_enter_loss()
2213 	    (icsk->icsk_ca_state == TCP_CA_Loss && !icsk->icsk_retransmits)) {  in tcp_enter_loss()
2216 		tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk);  in tcp_enter_loss()
2228 	if (icsk->icsk_ca_state <= TCP_CA_Disorder &&  in tcp_enter_loss()
2243 		   (new_recovery || icsk->icsk_retransmits) &&  in tcp_enter_loss()
2586 		const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_undo_cwnd_reduction()  local
2588 		tcp_snd_cwnd_set(tp, icsk->icsk_ca_ops->undo_cwnd(sk));  in tcp_undo_cwnd_reduction()
2804 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_mtup_probe_failed()  local
2806 	icsk->icsk_mtup.search_high = icsk->icsk_mtup.probe_size - 1;  in tcp_mtup_probe_failed()
2807 	icsk->icsk_mtup.probe_size = 0;  in tcp_mtup_probe_failed()
2814 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_mtup_probe_success()  local
2820 	do_div(val, icsk->icsk_mtup.probe_size);  in tcp_mtup_probe_success()
2828 	icsk->icsk_mtup.search_low = icsk->icsk_mtup.probe_size;  in tcp_mtup_probe_success()
2829 	icsk->icsk_mtup.probe_size = 0;  in tcp_mtup_probe_success()
2830 	tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);  in tcp_mtup_probe_success()
2846 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_non_congestion_loss_retransmit()  local
2849 	if (icsk->icsk_ca_state != TCP_CA_Loss) {  in tcp_non_congestion_loss_retransmit()
3074 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_fastretrans_alert()  local
3098 	if (icsk->icsk_ca_state == TCP_CA_Open) {  in tcp_fastretrans_alert()
3102 		switch (icsk->icsk_ca_state) {  in tcp_fastretrans_alert()
3123 	switch (icsk->icsk_ca_state) {  in tcp_fastretrans_alert()
3135 		if (icsk->icsk_ca_state != TCP_CA_Recovery) {  in tcp_fastretrans_alert()
3146 		if (icsk->icsk_ca_state != TCP_CA_Loss)  in tcp_fastretrans_alert()
3149 		if (!(icsk->icsk_ca_state == TCP_CA_Open ||  in tcp_fastretrans_alert()
3161 		if (icsk->icsk_ca_state <= TCP_CA_Disorder)  in tcp_fastretrans_alert()
3171 		if (icsk->icsk_ca_state < TCP_CA_CWR &&  in tcp_fastretrans_alert()
3172 		    icsk->icsk_mtup.probe_size &&  in tcp_fastretrans_alert()
3263 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_cong_avoid()  local
3265 	icsk->icsk_ca_ops->cong_avoid(sk, ack, acked);  in tcp_cong_avoid()
3274 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_rearm_rto()  local
3288 		if (icsk->icsk_pending == ICSK_TIME_REO_TIMEOUT ||  in tcp_rearm_rto()
3289 		    icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {  in tcp_rearm_rto()
3354 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_clean_rtx_queue()  local
3485 		if (unlikely(icsk->icsk_mtup.probe_size &&  in tcp_clean_rtx_queue()
3521 	if (icsk->icsk_ca_ops->pkts_acked) {  in tcp_clean_rtx_queue()
3527 		icsk->icsk_ca_ops->pkts_acked(sk, &sample);  in tcp_clean_rtx_queue()
3535 		icsk = inet_csk(sk);  in tcp_clean_rtx_queue()
3538 				 tp->lost_out, icsk->icsk_ca_state);  in tcp_clean_rtx_queue()
3543 				 tp->sacked_out, icsk->icsk_ca_state);  in tcp_clean_rtx_queue()
3548 				 tp->retrans_out, icsk->icsk_ca_state);  in tcp_clean_rtx_queue()
3558 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_ack_probe()  local
3566 		icsk->icsk_backoff = 0;  in tcp_ack_probe()
3567 		icsk->icsk_probes_tstamp = 0;  in tcp_ack_probe()
3610 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_cong_control()  local
3612 	if (icsk->icsk_ca_ops->cong_control) {  in tcp_cong_control()
3613 		icsk->icsk_ca_ops->cong_control(sk, ack, flag, rs);  in tcp_cong_control()
3883 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_in_ack_event()  local
3885 	if (icsk->icsk_ca_ops->in_ack_event) {  in tcp_in_ack_event()
3896 		icsk->icsk_ca_ops->in_ack_event(sk, ack_ev_flags);  in tcp_in_ack_event()
3939 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_ack()  local
3986 		icsk->icsk_retransmits = 0;  in tcp_ack()
4048 	icsk->icsk_probes_out = 0;  in tcp_ack()
6331 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_init_transfer()  local
6335 	icsk->icsk_af_ops->rebuild_header(sk);  in tcp_init_transfer()
6352 	if (!icsk->icsk_ca_initialized)  in tcp_init_transfer()
6360 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_finish_connect()  local
6364 	icsk->icsk_ack.lrcvtime = tcp_jiffies32;  in tcp_finish_connect()
6367 		icsk->icsk_af_ops->sk_rx_dst_set(sk, skb);  in tcp_finish_connect()
6479 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_rcv_synsent_state_process()  local
6502 			if (icsk->icsk_retransmits == 0)  in tcp_rcv_synsent_state_process()
6584 		tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);  in tcp_rcv_synsent_state_process()
6608 		    READ_ONCE(icsk->icsk_accept_queue.rskq_defer_accept) ||  in tcp_rcv_synsent_state_process()
6685 		tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);  in tcp_rcv_synsent_state_process()
6775 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_rcv_state_process()  local
6804 			icsk->icsk_af_ops->conn_request(sk, skb);  in tcp_rcv_state_process()