28 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_clamp_rto_to_user_timeout()  local
33 	user_timeout = READ_ONCE(icsk->icsk_user_timeout);  in tcp_clamp_rto_to_user_timeout()
35 		return icsk->icsk_rto;  in tcp_clamp_rto_to_user_timeout()
41 	return min_t(u32, icsk->icsk_rto, msecs_to_jiffies(remaining));  in tcp_clamp_rto_to_user_timeout()
46 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_clamp_probe0_to_user_timeout()  local
50 	user_timeout = READ_ONCE(icsk->icsk_user_timeout);  in tcp_clamp_probe0_to_user_timeout()
51 	if (!user_timeout || !icsk->icsk_probes_tstamp)  in tcp_clamp_probe0_to_user_timeout()
54 	elapsed = tcp_jiffies32 - icsk->icsk_probes_tstamp;  in tcp_clamp_probe0_to_user_timeout()
162 static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk)  in tcp_mtu_probing()  argument
171 	if (!icsk->icsk_mtup.enabled) {  in tcp_mtu_probing()
172 		icsk->icsk_mtup.enabled = 1;  in tcp_mtu_probing()
173 		icsk->icsk_mtup.probe_timestamp = tcp_jiffies32;  in tcp_mtu_probing()
175 		mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low) >> 1;  in tcp_mtu_probing()
179 		icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss);  in tcp_mtu_probing()
181 	tcp_sync_mss(sk, icsk->icsk_pmtu_cookie);  in tcp_mtu_probing()
235 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_write_timeout()  local
242 		if (icsk->icsk_retransmits)  in tcp_write_timeout()
245 		retry_until = READ_ONCE(icsk->icsk_syn_retries) ? :  in tcp_write_timeout()
252 		expired = icsk->icsk_retransmits >= max_retransmits;  in tcp_write_timeout()
256 			tcp_mtu_probing(icsk, sk);  in tcp_write_timeout()
263 			const bool alive = icsk->icsk_rto < TCP_RTO_MAX;  in tcp_write_timeout()
275 						READ_ONCE(icsk->icsk_user_timeout));  in tcp_write_timeout()
280 				  icsk->icsk_retransmits,  in tcp_write_timeout()
281 				  icsk->icsk_rto, (int)expired);  in tcp_write_timeout()
300 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_delack_timer_handler()  local
313 	if (!(icsk->icsk_ack.pending & ICSK_ACK_TIMER))  in tcp_delack_timer_handler()
316 	if (time_after(icsk->icsk_ack.timeout, jiffies)) {  in tcp_delack_timer_handler()
317 		sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout);  in tcp_delack_timer_handler()
320 	icsk->icsk_ack.pending &= ~ICSK_ACK_TIMER;  in tcp_delack_timer_handler()
325 			icsk->icsk_ack.ato = min(icsk->icsk_ack.ato << 1, icsk->icsk_rto);  in tcp_delack_timer_handler()
331 			icsk->icsk_ack.ato      = TCP_ATO_MIN;  in tcp_delack_timer_handler()
351 	struct inet_connection_sock *icsk =  in tcp_delack_timer()  local
352 			from_timer(icsk, t, icsk_delack_timer);  in tcp_delack_timer()
353 	struct sock *sk = &icsk->icsk_inet.sk;  in tcp_delack_timer()
370 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_probe_timer()  local
376 		icsk->icsk_probes_out = 0;  in tcp_probe_timer()
377 		icsk->icsk_probes_tstamp = 0;  in tcp_probe_timer()
389 	if (!icsk->icsk_probes_tstamp) {  in tcp_probe_timer()
390 		icsk->icsk_probes_tstamp = tcp_jiffies32;  in tcp_probe_timer()
392 		u32 user_timeout = READ_ONCE(icsk->icsk_user_timeout);  in tcp_probe_timer()
395 		    (s32)(tcp_jiffies32 - icsk->icsk_probes_tstamp) >=  in tcp_probe_timer()
401 		const bool alive = inet_csk_rto_backoff(icsk, TCP_RTO_MAX) < TCP_RTO_MAX;  in tcp_probe_timer()
404 		if (!alive && icsk->icsk_backoff >= max_probes)  in tcp_probe_timer()
410 	if (icsk->icsk_probes_out >= max_probes) {  in tcp_probe_timer()
424 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_fastopen_synack_timer()  local
433 	max_retries = READ_ONCE(icsk->icsk_syn_retries) ? :  in tcp_fastopen_synack_timer()
441 	if (icsk->icsk_retransmits == 1)  in tcp_fastopen_synack_timer()
450 	icsk->icsk_retransmits++;  in tcp_fastopen_synack_timer()
489 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_retransmit_timer()  local
555 	if (icsk->icsk_retransmits == 0) {  in tcp_retransmit_timer()
558 		if (icsk->icsk_ca_state == TCP_CA_Recovery) {  in tcp_retransmit_timer()
563 		} else if (icsk->icsk_ca_state == TCP_CA_Loss) {  in tcp_retransmit_timer()
565 		} else if ((icsk->icsk_ca_state == TCP_CA_Disorder) ||  in tcp_retransmit_timer()
578 	icsk->icsk_retransmits++;  in tcp_retransmit_timer()
604 	icsk->icsk_backoff++;  in tcp_retransmit_timer()
619 	    icsk->icsk_retransmits <= TCP_THIN_LINEAR_RETRIES) {  in tcp_retransmit_timer()
620 		icsk->icsk_backoff = 0;  in tcp_retransmit_timer()
621 		icsk->icsk_rto = clamp(__tcp_set_rto(tp),  in tcp_retransmit_timer()
625 		   icsk->icsk_backoff >  in tcp_retransmit_timer()
630 		icsk->icsk_rto = min(icsk->icsk_rto << 1, TCP_RTO_MAX);  in tcp_retransmit_timer()
644 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_write_timer_handler()  local
648 	    !icsk->icsk_pending)  in tcp_write_timer_handler()
651 	if (time_after(icsk->icsk_timeout, jiffies)) {  in tcp_write_timer_handler()
652 		sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout);  in tcp_write_timer_handler()
657 	event = icsk->icsk_pending;  in tcp_write_timer_handler()
667 		icsk->icsk_pending = 0;  in tcp_write_timer_handler()
671 		icsk->icsk_pending = 0;  in tcp_write_timer_handler()
679 	struct inet_connection_sock *icsk =  in tcp_write_timer()  local
680 			from_timer(icsk, t, icsk_retransmit_timer);  in tcp_write_timer()
681 	struct sock *sk = &icsk->icsk_inet.sk;  in tcp_write_timer()
719 	struct inet_connection_sock *icsk = inet_csk(sk);  in tcp_keepalive_timer()  local
763 		u32 user_timeout = READ_ONCE(icsk->icsk_user_timeout);  in tcp_keepalive_timer()
770 		    icsk->icsk_probes_out > 0) ||  in tcp_keepalive_timer()
772 		    icsk->icsk_probes_out >= keepalive_probes(tp))) {  in tcp_keepalive_timer()
778 			icsk->icsk_probes_out++;  in tcp_keepalive_timer()