41 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_clamp_rto_to_user_timeout()  local
45 	if (!icsk->icsk_user_timeout || !start_ts)  in tcp_clamp_rto_to_user_timeout()
46 		return icsk->icsk_rto;  in tcp_clamp_rto_to_user_timeout()
48 	if (elapsed >= icsk->icsk_user_timeout)  in tcp_clamp_rto_to_user_timeout()
51 		return min_t(u32, icsk->icsk_rto, msecs_to_jiffies(icsk->icsk_user_timeout - elapsed));  in tcp_clamp_rto_to_user_timeout()
153 static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk)  in tcp_mtu_probing()  argument
162 	if (!icsk->icsk_mtup.enabled) {  in tcp_mtu_probing()
163 		icsk->icsk_mtup.enabled = 1;  in tcp_mtu_probing()
164 		icsk->icsk_mtup.probe_timestamp = tcp_jiffies32;  in tcp_mtu_probing()
166 		mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low) >> 1;  in tcp_mtu_probing()
169 		icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);  in tcp_mtu_probing()
171 	tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);  in tcp_mtu_probing()
218 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_write_timeout()  local
225 		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()
244 			const bool alive = icsk->icsk_rto < TCP_RTO_MAX;  in tcp_write_timeout()
254 						icsk->icsk_user_timeout);  in tcp_write_timeout()
260 				  icsk->icsk_retransmits,  in tcp_write_timeout()
261 				  icsk->icsk_rto, (int)expired);  in tcp_write_timeout()
275 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_delack_timer_handler()  local
280 	    !(icsk->icsk_ack.pending & ICSK_ACK_TIMER))  in tcp_delack_timer_handler()
283 	if (time_after(icsk->icsk_ack.timeout, jiffies)) {  in tcp_delack_timer_handler()
284 		sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);  in tcp_delack_timer_handler()
287 	icsk->icsk_ack.pending &= ~ICSK_ACK_TIMER;  in tcp_delack_timer_handler()
290 		if (!icsk->icsk_ack.pingpong) {  in tcp_delack_timer_handler()
292 			icsk->icsk_ack.ato = min(icsk->icsk_ack.ato << 1, icsk->icsk_rto);  in tcp_delack_timer_handler()
297 			icsk->icsk_ack.pingpong = 0;  in tcp_delack_timer_handler()
298 			icsk->icsk_ack.ato      = TCP_ATO_MIN;  in tcp_delack_timer_handler()
322 	struct inet_connection_sock *icsk =  in tcp_delack_timer()  local
323 			from_timer(icsk, t, icsk_delack_timer);  in tcp_delack_timer()
324 	struct sock *sk = &icsk->icsk_inet.sk;  in tcp_delack_timer()
330 		icsk->icsk_ack.blocked = 1;  in tcp_delack_timer()
342 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_probe_timer()  local
349 		icsk->icsk_probes_out = 0;  in tcp_probe_timer()
364 	else if (icsk->icsk_user_timeout &&  in tcp_probe_timer()
365 		 (s32)(tcp_time_stamp(tp) - start_ts) > icsk->icsk_user_timeout)  in tcp_probe_timer()
370 		const bool alive = inet_csk_rto_backoff(icsk, TCP_RTO_MAX) < TCP_RTO_MAX;  in tcp_probe_timer()
373 		if (!alive && icsk->icsk_backoff >= max_probes)  in tcp_probe_timer()
379 	if (icsk->icsk_probes_out > max_probes) {  in tcp_probe_timer()
393 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_fastopen_synack_timer()  local
394 	int max_retries = icsk->icsk_syn_retries ? :  in tcp_fastopen_synack_timer()
412 	icsk->icsk_retransmits++;  in tcp_fastopen_synack_timer()
433 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_retransmit_timer()  local
488 	if (icsk->icsk_retransmits == 0) {  in tcp_retransmit_timer()
491 		if (icsk->icsk_ca_state == TCP_CA_Recovery) {  in tcp_retransmit_timer()
496 		} else if (icsk->icsk_ca_state == TCP_CA_Loss) {  in tcp_retransmit_timer()
498 		} else if ((icsk->icsk_ca_state == TCP_CA_Disorder) ||  in tcp_retransmit_timer()
516 		if (!icsk->icsk_retransmits)  in tcp_retransmit_timer()
517 			icsk->icsk_retransmits = 1;  in tcp_retransmit_timer()
519 					  min(icsk->icsk_rto, TCP_RESOURCE_PROBE_INTERVAL),  in tcp_retransmit_timer()
539 	icsk->icsk_backoff++;  in tcp_retransmit_timer()
540 	icsk->icsk_retransmits++;  in tcp_retransmit_timer()
555 	    icsk->icsk_retransmits <= TCP_THIN_LINEAR_RETRIES) {  in tcp_retransmit_timer()
556 		icsk->icsk_backoff = 0;  in tcp_retransmit_timer()
557 		icsk->icsk_rto = min(__tcp_set_rto(tp), TCP_RTO_MAX);  in tcp_retransmit_timer()
560 		icsk->icsk_rto = min(icsk->icsk_rto << 1, TCP_RTO_MAX);  in tcp_retransmit_timer()
574 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_write_timer_handler()  local
578 	    !icsk->icsk_pending)  in tcp_write_timer_handler()
581 	if (time_after(icsk->icsk_timeout, jiffies)) {  in tcp_write_timer_handler()
582 		sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);  in tcp_write_timer_handler()
587 	event = icsk->icsk_pending;  in tcp_write_timer_handler()
597 		icsk->icsk_pending = 0;  in tcp_write_timer_handler()
601 		icsk->icsk_pending = 0;  in tcp_write_timer_handler()
612 	struct inet_connection_sock *icsk =  in tcp_write_timer()  local
613 			from_timer(icsk, t, icsk_retransmit_timer);  in tcp_write_timer()
614 	struct sock *sk = &icsk->icsk_inet.sk;  in tcp_write_timer()
652 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_keepalive_timer()  local
699 		if ((icsk->icsk_user_timeout != 0 &&  in tcp_keepalive_timer()
700 		    elapsed >= msecs_to_jiffies(icsk->icsk_user_timeout) &&  in tcp_keepalive_timer()
701 		    icsk->icsk_probes_out > 0) ||  in tcp_keepalive_timer()
702 		    (icsk->icsk_user_timeout == 0 &&  in tcp_keepalive_timer()
703 		    icsk->icsk_probes_out >= keepalive_probes(tp))) {  in tcp_keepalive_timer()
709 			icsk->icsk_probes_out++;  in tcp_keepalive_timer()