Lines Matching refs:sk
26 static u32 tcp_clamp_rto_to_user_timeout(const struct sock *sk) in tcp_clamp_rto_to_user_timeout() argument
28 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_clamp_rto_to_user_timeout()
32 start_ts = tcp_sk(sk)->retrans_stamp; in tcp_clamp_rto_to_user_timeout()
35 elapsed = tcp_time_stamp(tcp_sk(sk)) - start_ts; in tcp_clamp_rto_to_user_timeout()
50 static void tcp_write_err(struct sock *sk) in tcp_write_err() argument
52 sk->sk_err = sk->sk_err_soft ? : ETIMEDOUT; in tcp_write_err()
53 sk->sk_error_report(sk); in tcp_write_err()
55 tcp_write_queue_purge(sk); in tcp_write_err()
56 tcp_done(sk); in tcp_write_err()
57 __NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPABORTONTIMEOUT); in tcp_write_err()
84 static int tcp_out_of_resources(struct sock *sk, bool do_reset) in tcp_out_of_resources() argument
86 struct tcp_sock *tp = tcp_sk(sk); in tcp_out_of_resources()
95 if (sk->sk_err_soft) in tcp_out_of_resources()
98 if (tcp_check_oom(sk, shift)) { in tcp_out_of_resources()
106 tcp_send_active_reset(sk, GFP_ATOMIC); in tcp_out_of_resources()
107 tcp_done(sk); in tcp_out_of_resources()
108 __NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPABORTONMEMORY); in tcp_out_of_resources()
112 if (!check_net(sock_net(sk))) { in tcp_out_of_resources()
114 tcp_done(sk); in tcp_out_of_resources()
126 static int tcp_orphan_retries(struct sock *sk, bool alive) in tcp_orphan_retries() argument
128 int retries = sock_net(sk)->ipv4.sysctl_tcp_orphan_retries; /* May be zero. */ in tcp_orphan_retries()
131 if (sk->sk_err_soft && !alive) in tcp_orphan_retries()
142 static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk) in tcp_mtu_probing() argument
144 const struct net *net = sock_net(sk); 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()
164 static unsigned int tcp_model_timeout(struct sock *sk, in tcp_model_timeout() argument
191 static bool retransmits_timed_out(struct sock *sk, in retransmits_timed_out() argument
197 if (!inet_csk(sk)->icsk_retransmits) in retransmits_timed_out()
200 start_ts = tcp_sk(sk)->retrans_stamp; in retransmits_timed_out()
204 if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) in retransmits_timed_out()
205 rto_base = tcp_timeout_init(sk); in retransmits_timed_out()
206 timeout = tcp_model_timeout(sk, boundary, rto_base); in retransmits_timed_out()
209 return (s32)(tcp_time_stamp(tcp_sk(sk)) - start_ts - timeout) >= 0; in retransmits_timed_out()
213 static int tcp_write_timeout(struct sock *sk) in tcp_write_timeout() argument
215 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_write_timeout()
216 struct tcp_sock *tp = tcp_sk(sk); in tcp_write_timeout()
217 struct net *net = sock_net(sk); in tcp_write_timeout()
221 if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { in tcp_write_timeout()
223 dst_negative_advice(sk); in tcp_write_timeout()
225 sk_rethink_txhash(sk); in tcp_write_timeout()
227 __NET_INC_STATS(sock_net(sk), in tcp_write_timeout()
233 if (retransmits_timed_out(sk, net->ipv4.sysctl_tcp_retries1, 0)) { in tcp_write_timeout()
235 tcp_mtu_probing(icsk, sk); in tcp_write_timeout()
237 dst_negative_advice(sk); in tcp_write_timeout()
239 sk_rethink_txhash(sk); in tcp_write_timeout()
241 __NET_INC_STATS(sock_net(sk), in tcp_write_timeout()
246 if (sock_flag(sk, SOCK_DEAD)) { in tcp_write_timeout()
249 retry_until = tcp_orphan_retries(sk, alive); in tcp_write_timeout()
251 !retransmits_timed_out(sk, retry_until, 0); in tcp_write_timeout()
253 if (tcp_out_of_resources(sk, do_reset)) in tcp_write_timeout()
258 expired = retransmits_timed_out(sk, retry_until, in tcp_write_timeout()
260 tcp_fastopen_active_detect_blackhole(sk, expired); in tcp_write_timeout()
263 tcp_call_bpf_3arg(sk, BPF_SOCK_OPS_RTO_CB, in tcp_write_timeout()
269 tcp_write_err(sk); in tcp_write_timeout()
277 void tcp_delack_timer_handler(struct sock *sk) in tcp_delack_timer_handler() argument
279 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_delack_timer_handler()
281 sk_mem_reclaim_partial(sk); in tcp_delack_timer_handler()
283 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN)) || in tcp_delack_timer_handler()
288 sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout); in tcp_delack_timer_handler()
293 if (inet_csk_ack_scheduled(sk)) { in tcp_delack_timer_handler()
294 if (!inet_csk_in_pingpong_mode(sk)) { in tcp_delack_timer_handler()
301 inet_csk_exit_pingpong_mode(sk); in tcp_delack_timer_handler()
304 tcp_mstamp_refresh(tcp_sk(sk)); in tcp_delack_timer_handler()
305 tcp_send_ack(sk); in tcp_delack_timer_handler()
306 __NET_INC_STATS(sock_net(sk), LINUX_MIB_DELAYEDACKS); in tcp_delack_timer_handler()
310 if (tcp_under_memory_pressure(sk)) in tcp_delack_timer_handler()
311 sk_mem_reclaim(sk); in tcp_delack_timer_handler()
328 struct sock *sk = &icsk->icsk_inet.sk; in tcp_delack_timer() local
330 bh_lock_sock(sk); in tcp_delack_timer()
331 if (!sock_owned_by_user(sk)) { in tcp_delack_timer()
332 tcp_delack_timer_handler(sk); in tcp_delack_timer()
334 __NET_INC_STATS(sock_net(sk), LINUX_MIB_DELAYEDACKLOCKED); in tcp_delack_timer()
336 if (!test_and_set_bit(TCP_DELACK_TIMER_DEFERRED, &sk->sk_tsq_flags)) in tcp_delack_timer()
337 sock_hold(sk); in tcp_delack_timer()
339 bh_unlock_sock(sk); in tcp_delack_timer()
340 sock_put(sk); in tcp_delack_timer()
343 static void tcp_probe_timer(struct sock *sk) in tcp_probe_timer() argument
345 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_probe_timer()
346 struct sk_buff *skb = tcp_send_head(sk); in tcp_probe_timer()
347 struct tcp_sock *tp = tcp_sk(sk); in tcp_probe_timer()
364 u32 elapsed = tcp_model_timeout(sk, icsk->icsk_probes_out, in tcp_probe_timer()
365 tcp_probe0_base(sk)); in tcp_probe_timer()
371 max_probes = sock_net(sk)->ipv4.sysctl_tcp_retries2; in tcp_probe_timer()
372 if (sock_flag(sk, SOCK_DEAD)) { in tcp_probe_timer()
375 max_probes = tcp_orphan_retries(sk, alive); in tcp_probe_timer()
378 if (tcp_out_of_resources(sk, true)) in tcp_probe_timer()
383 abort: tcp_write_err(sk); in tcp_probe_timer()
386 tcp_send_probe0(sk); in tcp_probe_timer()
394 static void tcp_fastopen_synack_timer(struct sock *sk, struct request_sock *req) in tcp_fastopen_synack_timer() argument
396 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_fastopen_synack_timer()
398 sock_net(sk)->ipv4.sysctl_tcp_synack_retries + 1; /* add one more retry for fastopen */ in tcp_fastopen_synack_timer()
399 struct tcp_sock *tp = tcp_sk(sk); in tcp_fastopen_synack_timer()
404 tcp_write_err(sk); in tcp_fastopen_synack_timer()
409 tcp_enter_loss(sk); in tcp_fastopen_synack_timer()
415 inet_rtx_syn_ack(sk, req); in tcp_fastopen_synack_timer()
420 inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, in tcp_fastopen_synack_timer()
436 void tcp_retransmit_timer(struct sock *sk) in tcp_retransmit_timer() argument
438 struct tcp_sock *tp = tcp_sk(sk); in tcp_retransmit_timer()
439 struct net *net = sock_net(sk); in tcp_retransmit_timer()
440 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_retransmit_timer()
445 lockdep_sock_is_held(sk)); in tcp_retransmit_timer()
447 WARN_ON_ONCE(sk->sk_state != TCP_SYN_RECV && in tcp_retransmit_timer()
448 sk->sk_state != TCP_FIN_WAIT1); in tcp_retransmit_timer()
449 tcp_fastopen_synack_timer(sk, req); in tcp_retransmit_timer()
459 skb = tcp_rtx_queue_head(sk); in tcp_retransmit_timer()
465 if (!tp->snd_wnd && !sock_flag(sk, SOCK_DEAD) && in tcp_retransmit_timer()
466 !((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV))) { in tcp_retransmit_timer()
472 struct inet_sock *inet = inet_sk(sk); in tcp_retransmit_timer()
473 if (sk->sk_family == AF_INET) { in tcp_retransmit_timer()
481 else if (sk->sk_family == AF_INET6) { in tcp_retransmit_timer()
483 &sk->sk_v6_daddr, in tcp_retransmit_timer()
490 tcp_write_err(sk); in tcp_retransmit_timer()
493 tcp_enter_loss(sk); in tcp_retransmit_timer()
494 tcp_retransmit_skb(sk, skb, 1); in tcp_retransmit_timer()
495 __sk_dst_reset(sk); in tcp_retransmit_timer()
499 __NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPTIMEOUTS); in tcp_retransmit_timer()
500 if (tcp_write_timeout(sk)) in tcp_retransmit_timer()
521 __NET_INC_STATS(sock_net(sk), mib_idx); in tcp_retransmit_timer()
524 tcp_enter_loss(sk); in tcp_retransmit_timer()
527 if (tcp_retransmit_skb(sk, tcp_rtx_queue_head(sk), 1) > 0) { in tcp_retransmit_timer()
531 inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, in tcp_retransmit_timer()
564 if (sk->sk_state == TCP_ESTABLISHED && in tcp_retransmit_timer()
574 inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, in tcp_retransmit_timer()
575 tcp_clamp_rto_to_user_timeout(sk), TCP_RTO_MAX); in tcp_retransmit_timer()
576 if (retransmits_timed_out(sk, net->ipv4.sysctl_tcp_retries1 + 1, 0)) in tcp_retransmit_timer()
577 __sk_dst_reset(sk); in tcp_retransmit_timer()
584 void tcp_write_timer_handler(struct sock *sk) in tcp_write_timer_handler() argument
586 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_write_timer_handler()
589 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN)) || in tcp_write_timer_handler()
594 sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout); in tcp_write_timer_handler()
598 tcp_mstamp_refresh(tcp_sk(sk)); in tcp_write_timer_handler()
603 tcp_rack_reo_timeout(sk); in tcp_write_timer_handler()
606 tcp_send_loss_probe(sk); in tcp_write_timer_handler()
610 tcp_retransmit_timer(sk); in tcp_write_timer_handler()
614 tcp_probe_timer(sk); in tcp_write_timer_handler()
619 sk_mem_reclaim(sk); in tcp_write_timer_handler()
626 struct sock *sk = &icsk->icsk_inet.sk; in tcp_write_timer() local
628 bh_lock_sock(sk); in tcp_write_timer()
629 if (!sock_owned_by_user(sk)) { in tcp_write_timer()
630 tcp_write_timer_handler(sk); in tcp_write_timer()
633 if (!test_and_set_bit(TCP_WRITE_TIMER_DEFERRED, &sk->sk_tsq_flags)) in tcp_write_timer()
634 sock_hold(sk); in tcp_write_timer()
636 bh_unlock_sock(sk); in tcp_write_timer()
637 sock_put(sk); in tcp_write_timer()
648 void tcp_set_keepalive(struct sock *sk, int val) in tcp_set_keepalive() argument
650 if ((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN)) in tcp_set_keepalive()
653 if (val && !sock_flag(sk, SOCK_KEEPOPEN)) in tcp_set_keepalive()
654 inet_csk_reset_keepalive_timer(sk, keepalive_time_when(tcp_sk(sk))); in tcp_set_keepalive()
656 inet_csk_delete_keepalive_timer(sk); in tcp_set_keepalive()
663 struct sock *sk = from_timer(sk, t, sk_timer); in tcp_keepalive_timer() local
664 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_keepalive_timer()
665 struct tcp_sock *tp = tcp_sk(sk); in tcp_keepalive_timer()
669 bh_lock_sock(sk); in tcp_keepalive_timer()
670 if (sock_owned_by_user(sk)) { in tcp_keepalive_timer()
672 inet_csk_reset_keepalive_timer (sk, HZ/20); in tcp_keepalive_timer()
676 if (sk->sk_state == TCP_LISTEN) { in tcp_keepalive_timer()
682 if (sk->sk_state == TCP_FIN_WAIT2 && sock_flag(sk, SOCK_DEAD)) { in tcp_keepalive_timer()
684 const int tmo = tcp_fin_time(sk) - TCP_TIMEWAIT_LEN; in tcp_keepalive_timer()
687 tcp_time_wait(sk, TCP_FIN_WAIT2, tmo); in tcp_keepalive_timer()
691 tcp_send_active_reset(sk, GFP_ATOMIC); in tcp_keepalive_timer()
695 if (!sock_flag(sk, SOCK_KEEPOPEN) || in tcp_keepalive_timer()
696 ((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT))) in tcp_keepalive_timer()
702 if (tp->packets_out || !tcp_write_queue_empty(sk)) in tcp_keepalive_timer()
716 tcp_send_active_reset(sk, GFP_ATOMIC); in tcp_keepalive_timer()
717 tcp_write_err(sk); in tcp_keepalive_timer()
720 if (tcp_write_wakeup(sk, LINUX_MIB_TCPKEEPALIVE) <= 0) { in tcp_keepalive_timer()
734 sk_mem_reclaim(sk); in tcp_keepalive_timer()
737 inet_csk_reset_keepalive_timer (sk, elapsed); in tcp_keepalive_timer()
741 tcp_done(sk); in tcp_keepalive_timer()
744 bh_unlock_sock(sk); in tcp_keepalive_timer()
745 sock_put(sk); in tcp_keepalive_timer()
751 struct sock *sk = (struct sock *)tp; in tcp_compressed_ack_kick() local
753 bh_lock_sock(sk); in tcp_compressed_ack_kick()
754 if (!sock_owned_by_user(sk)) { in tcp_compressed_ack_kick()
761 tcp_send_ack(sk); in tcp_compressed_ack_kick()
765 &sk->sk_tsq_flags)) in tcp_compressed_ack_kick()
766 sock_hold(sk); in tcp_compressed_ack_kick()
768 bh_unlock_sock(sk); in tcp_compressed_ack_kick()
770 sock_put(sk); in tcp_compressed_ack_kick()
775 void tcp_init_xmit_timers(struct sock *sk) in tcp_init_xmit_timers() argument
777 inet_csk_init_xmit_timers(sk, &tcp_write_timer, &tcp_delack_timer, in tcp_init_xmit_timers()
779 hrtimer_init(&tcp_sk(sk)->pacing_timer, CLOCK_MONOTONIC, in tcp_init_xmit_timers()
781 tcp_sk(sk)->pacing_timer.function = tcp_pace_kick; in tcp_init_xmit_timers()
783 hrtimer_init(&tcp_sk(sk)->compressed_ack_timer, CLOCK_MONOTONIC, in tcp_init_xmit_timers()
785 tcp_sk(sk)->compressed_ack_timer.function = tcp_compressed_ack_kick; in tcp_init_xmit_timers()