Lines Matching refs:sk
34 static void tcp_write_err(struct sock *sk) in tcp_write_err() argument
36 sk->sk_err = sk->sk_err_soft ? : ETIMEDOUT; in tcp_write_err()
37 sk->sk_error_report(sk); in tcp_write_err()
39 tcp_done(sk); in tcp_write_err()
40 __NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPABORTONTIMEOUT); in tcp_write_err()
67 static int tcp_out_of_resources(struct sock *sk, bool do_reset) in tcp_out_of_resources() argument
69 struct tcp_sock *tp = tcp_sk(sk); in tcp_out_of_resources()
78 if (sk->sk_err_soft) in tcp_out_of_resources()
81 if (tcp_check_oom(sk, shift)) { in tcp_out_of_resources()
89 tcp_send_active_reset(sk, GFP_ATOMIC); in tcp_out_of_resources()
90 tcp_done(sk); in tcp_out_of_resources()
91 __NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPABORTONMEMORY); in tcp_out_of_resources()
95 if (!check_net(sock_net(sk))) { in tcp_out_of_resources()
97 tcp_done(sk); in tcp_out_of_resources()
109 static int tcp_orphan_retries(struct sock *sk, bool alive) in tcp_orphan_retries() argument
111 int retries = sock_net(sk)->ipv4.sysctl_tcp_orphan_retries; /* May be zero. */ in tcp_orphan_retries()
114 if (sk->sk_err_soft && !alive) in tcp_orphan_retries()
125 static void tcp_mtu_probing(struct inet_connection_sock *icsk, struct sock *sk) in tcp_mtu_probing() argument
127 struct net *net = sock_net(sk); in tcp_mtu_probing()
134 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); in tcp_mtu_probing()
136 struct net *net = sock_net(sk); in tcp_mtu_probing()
137 struct tcp_sock *tp = tcp_sk(sk); in tcp_mtu_probing()
140 mss = tcp_mtu_to_mss(sk, icsk->icsk_mtup.search_low) >> 1; in tcp_mtu_probing()
143 icsk->icsk_mtup.search_low = tcp_mss_to_mtu(sk, mss); in tcp_mtu_probing()
144 tcp_sync_mss(sk, icsk->icsk_pmtu_cookie); in tcp_mtu_probing()
166 static bool retransmits_timed_out(struct sock *sk, in retransmits_timed_out() argument
174 if (!inet_csk(sk)->icsk_retransmits) in retransmits_timed_out()
177 start_ts = tcp_sk(sk)->retrans_stamp; in retransmits_timed_out()
179 start_ts = tcp_skb_timestamp(tcp_write_queue_head(sk)); in retransmits_timed_out()
194 static int tcp_write_timeout(struct sock *sk) in tcp_write_timeout() argument
196 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_write_timeout()
197 struct tcp_sock *tp = tcp_sk(sk); in tcp_write_timeout()
198 struct net *net = sock_net(sk); in tcp_write_timeout()
202 if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { in tcp_write_timeout()
204 dst_negative_advice(sk); in tcp_write_timeout()
206 tcp_fastopen_cache_set(sk, 0, NULL, true, 0); in tcp_write_timeout()
208 NET_INC_STATS(sock_net(sk), in tcp_write_timeout()
211 sk_rethink_txhash(sk); in tcp_write_timeout()
216 if (retransmits_timed_out(sk, net->ipv4.sysctl_tcp_retries1, 0, 0)) { in tcp_write_timeout()
224 tcp_fastopen_cache_set(sk, 0, NULL, true, 0); in tcp_write_timeout()
226 NET_INC_STATS(sock_net(sk), in tcp_write_timeout()
230 tcp_mtu_probing(icsk, sk); in tcp_write_timeout()
232 dst_negative_advice(sk); in tcp_write_timeout()
234 sk_rethink_txhash(sk); in tcp_write_timeout()
238 if (sock_flag(sk, SOCK_DEAD)) { in tcp_write_timeout()
241 retry_until = tcp_orphan_retries(sk, alive); in tcp_write_timeout()
243 !retransmits_timed_out(sk, retry_until, 0, 0); in tcp_write_timeout()
245 if (tcp_out_of_resources(sk, do_reset)) in tcp_write_timeout()
250 if (retransmits_timed_out(sk, retry_until, in tcp_write_timeout()
253 tcp_write_err(sk); in tcp_write_timeout()
260 void tcp_delack_timer_handler(struct sock *sk) in tcp_delack_timer_handler() argument
262 struct tcp_sock *tp = tcp_sk(sk); in tcp_delack_timer_handler()
263 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_delack_timer_handler()
265 sk_mem_reclaim_partial(sk); in tcp_delack_timer_handler()
267 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN)) || in tcp_delack_timer_handler()
272 sk_reset_timer(sk, &icsk->icsk_delack_timer, icsk->icsk_ack.timeout); in tcp_delack_timer_handler()
280 __NET_INC_STATS(sock_net(sk), LINUX_MIB_TCPSCHEDULERFAILED); in tcp_delack_timer_handler()
283 sk_backlog_rcv(sk, skb); in tcp_delack_timer_handler()
288 if (inet_csk_ack_scheduled(sk)) { in tcp_delack_timer_handler()
299 tcp_send_ack(sk); in tcp_delack_timer_handler()
300 __NET_INC_STATS(sock_net(sk), LINUX_MIB_DELAYEDACKS); in tcp_delack_timer_handler()
304 if (tcp_under_memory_pressure(sk)) in tcp_delack_timer_handler()
305 sk_mem_reclaim(sk); in tcp_delack_timer_handler()
320 struct sock *sk = (struct sock *)data; in tcp_delack_timer() local
322 bh_lock_sock(sk); in tcp_delack_timer()
323 if (!sock_owned_by_user(sk)) { in tcp_delack_timer()
324 tcp_delack_timer_handler(sk); in tcp_delack_timer()
326 inet_csk(sk)->icsk_ack.blocked = 1; in tcp_delack_timer()
327 __NET_INC_STATS(sock_net(sk), LINUX_MIB_DELAYEDACKLOCKED); in tcp_delack_timer()
329 if (!test_and_set_bit(TCP_DELACK_TIMER_DEFERRED, &tcp_sk(sk)->tsq_flags)) in tcp_delack_timer()
330 sock_hold(sk); in tcp_delack_timer()
332 bh_unlock_sock(sk); in tcp_delack_timer()
333 sock_put(sk); in tcp_delack_timer()
336 static void tcp_probe_timer(struct sock *sk) in tcp_probe_timer() argument
338 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_probe_timer()
339 struct tcp_sock *tp = tcp_sk(sk); in tcp_probe_timer()
343 if (tp->packets_out || !tcp_send_head(sk)) { in tcp_probe_timer()
356 start_ts = tcp_skb_timestamp(tcp_send_head(sk)); in tcp_probe_timer()
358 skb_mstamp_get(&tcp_send_head(sk)->skb_mstamp); in tcp_probe_timer()
363 max_probes = sock_net(sk)->ipv4.sysctl_tcp_retries2; in tcp_probe_timer()
364 if (sock_flag(sk, SOCK_DEAD)) { in tcp_probe_timer()
367 max_probes = tcp_orphan_retries(sk, alive); in tcp_probe_timer()
370 if (tcp_out_of_resources(sk, true)) in tcp_probe_timer()
375 abort: tcp_write_err(sk); in tcp_probe_timer()
378 tcp_send_probe0(sk); in tcp_probe_timer()
386 static void tcp_fastopen_synack_timer(struct sock *sk) in tcp_fastopen_synack_timer() argument
388 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_fastopen_synack_timer()
390 sock_net(sk)->ipv4.sysctl_tcp_synack_retries + 1; /* add one more retry for fastopen */ in tcp_fastopen_synack_timer()
393 req = tcp_sk(sk)->fastopen_rsk; in tcp_fastopen_synack_timer()
397 tcp_write_err(sk); in tcp_fastopen_synack_timer()
405 inet_rtx_syn_ack(sk, req); in tcp_fastopen_synack_timer()
408 inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, in tcp_fastopen_synack_timer()
424 void tcp_retransmit_timer(struct sock *sk) in tcp_retransmit_timer() argument
426 struct tcp_sock *tp = tcp_sk(sk); in tcp_retransmit_timer()
427 struct net *net = sock_net(sk); in tcp_retransmit_timer()
428 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_retransmit_timer()
431 WARN_ON_ONCE(sk->sk_state != TCP_SYN_RECV && in tcp_retransmit_timer()
432 sk->sk_state != TCP_FIN_WAIT1); in tcp_retransmit_timer()
433 tcp_fastopen_synack_timer(sk); in tcp_retransmit_timer()
442 WARN_ON(tcp_write_queue_empty(sk)); in tcp_retransmit_timer()
446 if (!tp->snd_wnd && !sock_flag(sk, SOCK_DEAD) && in tcp_retransmit_timer()
447 !((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV))) { in tcp_retransmit_timer()
453 struct inet_sock *inet = inet_sk(sk); in tcp_retransmit_timer()
454 if (sk->sk_family == AF_INET) { in tcp_retransmit_timer()
462 else if (sk->sk_family == AF_INET6) { in tcp_retransmit_timer()
464 &sk->sk_v6_daddr, in tcp_retransmit_timer()
471 tcp_write_err(sk); in tcp_retransmit_timer()
474 tcp_enter_loss(sk); in tcp_retransmit_timer()
475 tcp_retransmit_skb(sk, tcp_write_queue_head(sk), 1); in tcp_retransmit_timer()
476 __sk_dst_reset(sk); in tcp_retransmit_timer()
480 if (tcp_write_timeout(sk)) in tcp_retransmit_timer()
502 __NET_INC_STATS(sock_net(sk), mib_idx); in tcp_retransmit_timer()
505 tcp_enter_loss(sk); in tcp_retransmit_timer()
507 if (tcp_retransmit_skb(sk, tcp_write_queue_head(sk), 1) > 0) { in tcp_retransmit_timer()
513 inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, in tcp_retransmit_timer()
547 if (sk->sk_state == TCP_ESTABLISHED && in tcp_retransmit_timer()
557 inet_csk_reset_xmit_timer(sk, ICSK_TIME_RETRANS, icsk->icsk_rto, TCP_RTO_MAX); in tcp_retransmit_timer()
558 if (retransmits_timed_out(sk, net->ipv4.sysctl_tcp_retries1 + 1, 0, 0)) in tcp_retransmit_timer()
559 __sk_dst_reset(sk); in tcp_retransmit_timer()
566 void tcp_write_timer_handler(struct sock *sk) in tcp_write_timer_handler() argument
568 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_write_timer_handler()
571 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN)) || in tcp_write_timer_handler()
576 sk_reset_timer(sk, &icsk->icsk_retransmit_timer, icsk->icsk_timeout); in tcp_write_timer_handler()
584 tcp_resume_early_retransmit(sk); in tcp_write_timer_handler()
587 tcp_send_loss_probe(sk); in tcp_write_timer_handler()
591 tcp_retransmit_timer(sk); in tcp_write_timer_handler()
595 tcp_probe_timer(sk); in tcp_write_timer_handler()
600 sk_mem_reclaim(sk); in tcp_write_timer_handler()
605 struct sock *sk = (struct sock *)data; in tcp_write_timer() local
607 bh_lock_sock(sk); in tcp_write_timer()
608 if (!sock_owned_by_user(sk)) { in tcp_write_timer()
609 tcp_write_timer_handler(sk); in tcp_write_timer()
612 if (!test_and_set_bit(TCP_WRITE_TIMER_DEFERRED, &tcp_sk(sk)->tsq_flags)) in tcp_write_timer()
613 sock_hold(sk); in tcp_write_timer()
615 bh_unlock_sock(sk); in tcp_write_timer()
616 sock_put(sk); in tcp_write_timer()
627 void tcp_set_keepalive(struct sock *sk, int val) in tcp_set_keepalive() argument
629 if ((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN)) in tcp_set_keepalive()
632 if (val && !sock_flag(sk, SOCK_KEEPOPEN)) in tcp_set_keepalive()
633 inet_csk_reset_keepalive_timer(sk, keepalive_time_when(tcp_sk(sk))); in tcp_set_keepalive()
635 inet_csk_delete_keepalive_timer(sk); in tcp_set_keepalive()
641 struct sock *sk = (struct sock *) data; in tcp_keepalive_timer() local
642 struct inet_connection_sock *icsk = inet_csk(sk); in tcp_keepalive_timer()
643 struct tcp_sock *tp = tcp_sk(sk); in tcp_keepalive_timer()
647 bh_lock_sock(sk); in tcp_keepalive_timer()
648 if (sock_owned_by_user(sk)) { in tcp_keepalive_timer()
650 inet_csk_reset_keepalive_timer (sk, HZ/20); in tcp_keepalive_timer()
654 if (sk->sk_state == TCP_LISTEN) { in tcp_keepalive_timer()
659 if (sk->sk_state == TCP_FIN_WAIT2 && sock_flag(sk, SOCK_DEAD)) { in tcp_keepalive_timer()
661 const int tmo = tcp_fin_time(sk) - TCP_TIMEWAIT_LEN; in tcp_keepalive_timer()
664 tcp_time_wait(sk, TCP_FIN_WAIT2, tmo); in tcp_keepalive_timer()
668 tcp_send_active_reset(sk, GFP_ATOMIC); in tcp_keepalive_timer()
672 if (!sock_flag(sk, SOCK_KEEPOPEN) || in tcp_keepalive_timer()
673 ((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT))) in tcp_keepalive_timer()
679 if (tp->packets_out || tcp_send_head(sk)) in tcp_keepalive_timer()
693 tcp_send_active_reset(sk, GFP_ATOMIC); in tcp_keepalive_timer()
694 tcp_write_err(sk); in tcp_keepalive_timer()
697 if (tcp_write_wakeup(sk, LINUX_MIB_TCPKEEPALIVE) <= 0) { in tcp_keepalive_timer()
711 sk_mem_reclaim(sk); in tcp_keepalive_timer()
714 inet_csk_reset_keepalive_timer (sk, elapsed); in tcp_keepalive_timer()
718 tcp_done(sk); in tcp_keepalive_timer()
721 bh_unlock_sock(sk); in tcp_keepalive_timer()
722 sock_put(sk); in tcp_keepalive_timer()
725 void tcp_init_xmit_timers(struct sock *sk) in tcp_init_xmit_timers() argument
727 inet_csk_init_xmit_timers(sk, &tcp_write_timer, &tcp_delack_timer, in tcp_init_xmit_timers()