28 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_clamp_rto_to_user_timeout()  local
33 	if (!icsk->icsk_user_timeout)  in tcp_clamp_rto_to_user_timeout()
34 		return icsk->icsk_rto;  in tcp_clamp_rto_to_user_timeout()
36 	remaining = icsk->icsk_user_timeout - elapsed;  in tcp_clamp_rto_to_user_timeout()
40 	return min_t(u32, icsk->icsk_rto, msecs_to_jiffies(remaining));  in tcp_clamp_rto_to_user_timeout()
142 static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk)  in tcp_mtu_probing()  argument
151 	if (!icsk->icsk_mtup.enabled) {  in tcp_mtu_probing()
152 		icsk->icsk_mtup.enabled = 1;  in tcp_mtu_probing()
153 		icsk->icsk_mtup.probe_timestamp = tcp_jiffies32;  in tcp_mtu_probing()
155 		mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low) >> 1;  in tcp_mtu_probing()
159 		icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);  in tcp_mtu_probing()
161 	tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);  in tcp_mtu_probing()
215 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_write_timeout()  local
222 		if (icsk->icsk_retransmits) {  in tcp_write_timeout()
230 		retry_until = icsk->icsk_syn_retries ? : net->ipv4.sysctl_tcp_syn_retries;  in tcp_write_timeout()
231 		expired = icsk->icsk_retransmits >= retry_until;  in tcp_write_timeout()
235 			tcp_mtu_probing(icsk, sk);  in tcp_write_timeout()
247 			const bool alive = icsk->icsk_rto < TCP_RTO_MAX;  in tcp_write_timeout()
259 						icsk->icsk_user_timeout);  in tcp_write_timeout()
264 				  icsk->icsk_retransmits,  in tcp_write_timeout()
265 				  icsk->icsk_rto, (int)expired);  in tcp_write_timeout()
279 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_delack_timer_handler()  local
284 	    !(icsk->icsk_ack.pending & ICSK_ACK_TIMER))  in tcp_delack_timer_handler()
287 	if (time_after(icsk->icsk_ack.timeout, jiffies)) {  in tcp_delack_timer_handler()
288 		sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);  in tcp_delack_timer_handler()
291 	icsk->icsk_ack.pending &= ~ICSK_ACK_TIMER;  in tcp_delack_timer_handler()
296 			icsk->icsk_ack.ato = min(icsk->icsk_ack.ato << 1, icsk->icsk_rto);  in tcp_delack_timer_handler()
302 			icsk->icsk_ack.ato      = TCP_ATO_MIN;  in tcp_delack_timer_handler()
326 	struct inet_connection_sock *icsk =  in tcp_delack_timer()  local
327 			from_timer(icsk, t, icsk_delack_timer);  in tcp_delack_timer()
328 	struct sock *sk = &icsk->icsk_inet.sk;  in tcp_delack_timer()
345 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_probe_timer()  local
351 		icsk->icsk_probes_out = 0;  in tcp_probe_timer()
363 	if (icsk->icsk_user_timeout) {  in tcp_probe_timer()
364 		u32 elapsed = tcp_model_timeout(sk, icsk->icsk_probes_out,  in tcp_probe_timer()
367 		if (elapsed >= icsk->icsk_user_timeout)  in tcp_probe_timer()
373 		const bool alive = inet_csk_rto_backoff(icsk, TCP_RTO_MAX) < TCP_RTO_MAX;  in tcp_probe_timer()
376 		if (!alive && icsk->icsk_backoff >= max_probes)  in tcp_probe_timer()
382 	if (icsk->icsk_probes_out >= max_probes) {  in tcp_probe_timer()
396 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_fastopen_synack_timer()  local
397 	int max_retries = icsk->icsk_syn_retries ? :  in tcp_fastopen_synack_timer()
408 	if (icsk->icsk_retransmits == 1)  in tcp_fastopen_synack_timer()
417 	icsk->icsk_retransmits++;  in tcp_fastopen_synack_timer()
440 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_retransmit_timer()  local
503 	if (icsk->icsk_retransmits == 0) {  in tcp_retransmit_timer()
506 		if (icsk->icsk_ca_state == TCP_CA_Recovery) {  in tcp_retransmit_timer()
511 		} else if (icsk->icsk_ca_state == TCP_CA_Loss) {  in tcp_retransmit_timer()
513 		} else if ((icsk->icsk_ca_state == TCP_CA_Disorder) ||  in tcp_retransmit_timer()
526 	icsk->icsk_retransmits++;  in tcp_retransmit_timer()
552 	icsk->icsk_backoff++;  in tcp_retransmit_timer()
567 	    icsk->icsk_retransmits <= TCP_THIN_LINEAR_RETRIES) {  in tcp_retransmit_timer()
568 		icsk->icsk_backoff = 0;  in tcp_retransmit_timer()
569 		icsk->icsk_rto = min(__tcp_set_rto(tp), TCP_RTO_MAX);  in tcp_retransmit_timer()
572 		icsk->icsk_rto = min(icsk->icsk_rto << 1, TCP_RTO_MAX);  in tcp_retransmit_timer()
586 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_write_timer_handler()  local
590 	    !icsk->icsk_pending)  in tcp_write_timer_handler()
593 	if (time_after(icsk->icsk_timeout, jiffies)) {  in tcp_write_timer_handler()
594 		sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);  in tcp_write_timer_handler()
599 	event = icsk->icsk_pending;  in tcp_write_timer_handler()
609 		icsk->icsk_pending = 0;  in tcp_write_timer_handler()
613 		icsk->icsk_pending = 0;  in tcp_write_timer_handler()
624 	struct inet_connection_sock *icsk =  in tcp_write_timer()  local
625 			from_timer(icsk, t, icsk_retransmit_timer);  in tcp_write_timer()
626 	struct sock *sk = &icsk->icsk_inet.sk;  in tcp_write_timer()
664 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_keepalive_timer()  local
711 		if ((icsk->icsk_user_timeout != 0 &&  in tcp_keepalive_timer()
712 		    elapsed >= msecs_to_jiffies(icsk->icsk_user_timeout) &&  in tcp_keepalive_timer()
713 		    icsk->icsk_probes_out > 0) ||  in tcp_keepalive_timer()
714 		    (icsk->icsk_user_timeout == 0 &&  in tcp_keepalive_timer()
715 		    icsk->icsk_probes_out >= keepalive_probes(tp))) {  in tcp_keepalive_timer()
721 			icsk->icsk_probes_out++;  in tcp_keepalive_timer()