net/ipv4/tcp_timer.c

30 	const struct tcp_sock *tp = tcp_sk(sk);
38 	elapsed = tcp_time_stamp_ts(tp) - tp->retrans_stamp;
39 	if (tp->tcp_usec_ts)
111 	struct tcp_sock *tp = tcp_sk(sk);
116 	if ((s32)(tcp_jiffies32 - tp->lsndtime) > 2*TCP_RTO_MAX || !do_reset)
126 		if ((s32)(tcp_jiffies32 - tp->lsndtime) <= TCP_TIMEWAIT_LEN ||
128 		    (!tp->snd_wnd && !tp->packets_out))
221 	struct tcp_sock *tp = tcp_sk(sk);
227 	start_ts = tp->retrans_stamp;
236 	if (tp->tcp_usec_ts) {
238 		delta = tp->tcp_mstamp - start_ts + jiffies_to_usecs(1);
241 	return (s32)(tcp_time_stamp_ts(tp) - start_ts - timeout) >= 0;
248 	struct tcp_sock *tp = tcp_sk(sk);
290 	if (BPF_SOCK_OPS_TEST_FLAG(tp, BPF_SOCK_OPS_RTO_CB_FLAG))
302 		tp->timeout_rehash++;
313 	struct tcp_sock *tp = tcp_sk(sk);
319 	if (tp->compressed_ack) {
320 		tcp_mstamp_refresh(tp);
345 		tcp_mstamp_refresh(tp);
384 	struct tcp_sock *tp = tcp_sk(sk);
387 	if (tp->packets_out || !skb) {
433 	struct tcp_sock *tp = tcp_sk(sk);
436 		tp->total_rto_recoveries++;
437 		tp->rto_stamp = tcp_time_stamp_ms(tp);
440 	tp->total_rto++;
450 	struct tcp_sock *tp = tcp_sk(sk);
476 	if (!tp->retrans_stamp)
477 		tp->retrans_stamp = tcp_time_stamp_ts(tp);
486 	const struct tcp_sock *tp = tcp_sk(sk);
490 	rcv_delta = inet_csk(sk)->icsk_timeout - tp->rcv_tstamp;
510 	struct tcp_sock *tp = tcp_sk(sk);
516 	req = rcu_dereference_protected(tp->fastopen_rsk,
528 	if (!tp->packets_out)
535 	tp->tlp_high_seq = 0;
537 	if (!tp->snd_wnd && !sock_flag(sk, SOCK_DEAD) &&
547 		rtx_delta = tcp_time_stamp_ts(tp) - (tp->retrans_stamp ?:
548 				tcp_skb_timestamp_ts(tp->tcp_usec_ts, skb));
549 		if (tp->tcp_usec_ts)
555 				inet->inet_num, tp->snd_una, tp->snd_nxt,
556 				jiffies_to_msecs(jiffies - tp->rcv_tstamp),
563 				inet->inet_num, tp->snd_una, tp->snd_nxt,
564 				jiffies_to_msecs(jiffies - tp->rcv_tstamp),
586 			if (tcp_is_sack(tp))
593 			   tp->sacked_out) {
594 			if (tcp_is_sack(tp))
643 	    (tp->thin_lto || READ_ONCE(net->ipv4.sysctl_tcp_thin_linear_timeouts)) &&
644 	    tcp_stream_is_thin(tp) &&
647 		icsk->icsk_rto = clamp(__tcp_set_rto(tp),
651 		   tp->total_rto >
747 	struct tcp_sock *tp = tcp_sk(sk);
763 	tcp_mstamp_refresh(tp);
765 		if (READ_ONCE(tp->linger2) >= 0) {
781 	elapsed = keepalive_time_when(tp);
784 	if (tp->packets_out || !tcp_write_queue_empty(sk))
787 	elapsed = keepalive_time_elapsed(tp);
789 	if (elapsed >= keepalive_time_when(tp)) {
799 		    icsk->icsk_probes_out >= keepalive_probes(tp))) {
807 			elapsed = keepalive_intvl_when(tp);
815 		/* It is tp->rcv_tstamp + keepalive_time_when(tp) */
816 		elapsed = keepalive_time_when(tp) - elapsed;
833 	struct tcp_sock *tp = container_of(timer, struct tcp_sock, compressed_ack_timer);
834 	struct sock *sk = (struct sock *)tp;
838 		if (tp->compressed_ack) {
840 			 * subtract one from tp->compressed_ack to keep
843 			tp->compressed_ack--;