74 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_event_new_data_sent()  local
82 	if (!prior_packets || icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS ||  in tcp_event_new_data_sent()
83 	    icsk->icsk_pending == ICSK_TIME_LOSS_PROBE) {  in tcp_event_new_data_sent()
164 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_event_data_sent()  local
169 	    (!tp->packets_out && (s32)(now - tp->lsndtime) > icsk->icsk_rto))  in tcp_event_data_sent()
177 	if ((u32)(now - icsk->icsk_ack.lrcvtime) < icsk->icsk_ack.ato &&  in tcp_event_data_sent()
179 			icsk->icsk_ack.pingpong = 1;  in tcp_event_data_sent()
909 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_transmit_skb()  local
1009 	icsk->icsk_af_ops->send_check(sk, skb);  in tcp_transmit_skb()
1031 	err = icsk->icsk_af_ops->queue_xmit(sk, skb, &inet->cork.fl);  in tcp_transmit_skb()
1299 	const struct inet_connection_sock *icsk = inet_csk(sk);  in __tcp_mtu_to_mss()  local
1305 	mss_now = pmtu - icsk->icsk_af_ops->net_header_len - sizeof(struct tcphdr);  in __tcp_mtu_to_mss()
1308 	if (icsk->icsk_af_ops->net_frag_header_len) {  in __tcp_mtu_to_mss()
1312 			mss_now -= icsk->icsk_af_ops->net_frag_header_len;  in __tcp_mtu_to_mss()
1320 	mss_now -= icsk->icsk_ext_hdr_len;  in __tcp_mtu_to_mss()
1340 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_mss_to_mtu()  local
1345 	      icsk->icsk_ext_hdr_len +  in tcp_mss_to_mtu()
1346 	      icsk->icsk_af_ops->net_header_len;  in tcp_mss_to_mtu()
1349 	if (icsk->icsk_af_ops->net_frag_header_len) {  in tcp_mss_to_mtu()
1353 			mtu += icsk->icsk_af_ops->net_frag_header_len;  in tcp_mss_to_mtu()
1362 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_mtup_init()  local
1365 	icsk->icsk_mtup.enabled = net->ipv4.sysctl_tcp_mtu_probing > 1;  in tcp_mtup_init()
1366 	icsk->icsk_mtup.search_high = tp->rx_opt.mss_clamp + sizeof(struct tcphdr) +  in tcp_mtup_init()
1367 			       icsk->icsk_af_ops->net_header_len;  in tcp_mtup_init()
1368 	icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, net->ipv4.sysctl_tcp_base_mss);  in tcp_mtup_init()
1369 	icsk->icsk_mtup.probe_size = 0;  in tcp_mtup_init()
1370 	if (icsk->icsk_mtup.enabled)  in tcp_mtup_init()
1371 		icsk->icsk_mtup.probe_timestamp = tcp_time_stamp;  in tcp_mtup_init()
1400 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_sync_mss()  local
1403 	if (icsk->icsk_mtup.search_high > pmtu)  in tcp_sync_mss()
1404 		icsk->icsk_mtup.search_high = pmtu;  in tcp_sync_mss()
1410 	icsk->icsk_pmtu_cookie = pmtu;  in tcp_sync_mss()
1411 	if (icsk->icsk_mtup.enabled)  in tcp_sync_mss()
1412 		mss_now = min(mss_now, tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low));  in tcp_sync_mss()
1770 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_tso_should_defer()  local
1780 	if (!((1 << icsk->icsk_ca_state) & (TCPF_CA_Open | TCPF_CA_CWR)))  in tcp_tso_should_defer()
1848 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_mtu_check_reprobe()  local
1855 	delta = tcp_time_stamp - icsk->icsk_mtup.probe_timestamp;  in tcp_mtu_check_reprobe()
1860 		icsk->icsk_mtup.probe_size = 0;  in tcp_mtu_check_reprobe()
1861 		icsk->icsk_mtup.search_high = tp->rx_opt.mss_clamp +  in tcp_mtu_check_reprobe()
1863 			icsk->icsk_af_ops->net_header_len;  in tcp_mtu_check_reprobe()
1864 		icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);  in tcp_mtu_check_reprobe()
1867 		icsk->icsk_mtup.probe_timestamp = tcp_time_stamp;  in tcp_mtu_check_reprobe()
1883 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_mtu_probe()  local
1897 	if (!icsk->icsk_mtup.enabled ||  in tcp_mtu_probe()
1898 	    icsk->icsk_mtup.probe_size ||  in tcp_mtu_probe()
1909 	probe_size = tcp_mtu_to_mss(sk, (icsk->icsk_mtup.search_high +  in tcp_mtu_probe()
1910 				    icsk->icsk_mtup.search_low) >> 1);  in tcp_mtu_probe()
1912 	interval = icsk->icsk_mtup.search_high - icsk->icsk_mtup.search_low;  in tcp_mtu_probe()
1917 	if (probe_size > tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_high) ||  in tcp_mtu_probe()
2008 		icsk->icsk_mtup.probe_size = tcp_mss_to_mtu(sk, nskb->len);  in tcp_mtu_probe()
2160 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_schedule_loss_probe()  local
2165 	if (WARN_ON(icsk->icsk_pending == ICSK_TIME_EARLY_RETRANS))  in tcp_schedule_loss_probe()
2168 	if (WARN_ON(icsk->icsk_pending == ICSK_TIME_LOSS_PROBE)) {  in tcp_schedule_loss_probe()
2179 	if (icsk->icsk_pending != ICSK_TIME_RETRANS)  in tcp_schedule_loss_probe()
2375 	struct inet_connection_sock *icsk = inet_csk(sk);  in __tcp_select_window()  local
2383 	int mss = icsk->icsk_ack.rcv_mss;  in __tcp_select_window()
2393 		icsk->icsk_ack.quick = 0;  in __tcp_select_window()
2564 	struct inet_connection_sock *icsk = inet_csk(sk);  in __tcp_retransmit_skb()  local
2569 	if (icsk->icsk_mtup.probe_size) {  in __tcp_retransmit_skb()
2570 		icsk->icsk_mtup.probe_size = 0;  in __tcp_retransmit_skb()
2688 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_can_forward_retransmit()  local
2692 	if (icsk->icsk_ca_state != TCP_CA_Recovery)  in tcp_can_forward_retransmit()
2723 	const struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_xmit_retransmit_queue()  local
2791 			if (icsk->icsk_ca_state != TCP_CA_Loss)  in tcp_xmit_retransmit_queue()
3032 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_ca_dst_init()  local
3042 		module_put(icsk->icsk_ca_ops->owner);  in tcp_ca_dst_init()
3043 		icsk->icsk_ca_dst_locked = tcp_ca_dst_locked(dst);  in tcp_ca_dst_init()
3044 		icsk->icsk_ca_ops = ca;  in tcp_ca_dst_init()
3281 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_send_delayed_ack()  local
3282 	int ato = icsk->icsk_ack.ato;  in tcp_send_delayed_ack()
3291 		if (icsk->icsk_ack.pingpong ||  in tcp_send_delayed_ack()
3292 		    (icsk->icsk_ack.pending & ICSK_ACK_PUSHED))  in tcp_send_delayed_ack()
3316 	if (icsk->icsk_ack.pending & ICSK_ACK_TIMER) {  in tcp_send_delayed_ack()
3320 		if (icsk->icsk_ack.blocked ||  in tcp_send_delayed_ack()
3321 		    time_before_eq(icsk->icsk_ack.timeout, jiffies + (ato >> 2))) {  in tcp_send_delayed_ack()
3326 		if (!time_before(timeout, icsk->icsk_ack.timeout))  in tcp_send_delayed_ack()
3327 			timeout = icsk->icsk_ack.timeout;  in tcp_send_delayed_ack()
3329 	icsk->icsk_ack.pending |= ICSK_ACK_SCHED | ICSK_ACK_TIMER;  in tcp_send_delayed_ack()
3330 	icsk->icsk_ack.timeout = timeout;  in tcp_send_delayed_ack()
3331 	sk_reset_timer(sk, &icsk->icsk_delack_timer, timeout);  in tcp_send_delayed_ack()
3464 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_send_probe0()  local
3473 		icsk->icsk_probes_out = 0;  in tcp_send_probe0()
3474 		icsk->icsk_backoff = 0;  in tcp_send_probe0()
3479 		if (icsk->icsk_backoff < sysctl_tcp_retries2)  in tcp_send_probe0()
3480 			icsk->icsk_backoff++;  in tcp_send_probe0()
3481 		icsk->icsk_probes_out++;  in tcp_send_probe0()
3490 		if (!icsk->icsk_probes_out)  in tcp_send_probe0()
3491 			icsk->icsk_probes_out = 1;  in tcp_send_probe0()
3495 				  inet_csk_rto_backoff(icsk, probe_max),  in tcp_send_probe0()