Lines Matching refs:tp
215 static void tcp_ecn_queue_cwr(struct tcp_sock *tp) in tcp_ecn_queue_cwr() argument
217 if (tp->ecn_flags & TCP_ECN_OK) in tcp_ecn_queue_cwr()
218 tp->ecn_flags |= TCP_ECN_QUEUE_CWR; in tcp_ecn_queue_cwr()
221 static void tcp_ecn_accept_cwr(struct tcp_sock *tp, const struct sk_buff *skb) in tcp_ecn_accept_cwr() argument
224 tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR; in tcp_ecn_accept_cwr()
227 static void tcp_ecn_withdraw_cwr(struct tcp_sock *tp) in tcp_ecn_withdraw_cwr() argument
229 tp->ecn_flags &= ~TCP_ECN_QUEUE_CWR; in tcp_ecn_withdraw_cwr()
234 struct tcp_sock *tp = tcp_sk(sk); in __tcp_ecn_check_ce() local
242 if (tp->ecn_flags & TCP_ECN_SEEN) in __tcp_ecn_check_ce()
249 if (!(tp->ecn_flags & TCP_ECN_DEMAND_CWR)) { in __tcp_ecn_check_ce()
252 tp->ecn_flags |= TCP_ECN_DEMAND_CWR; in __tcp_ecn_check_ce()
254 tp->ecn_flags |= TCP_ECN_SEEN; in __tcp_ecn_check_ce()
259 tp->ecn_flags |= TCP_ECN_SEEN; in __tcp_ecn_check_ce()
270 static void tcp_ecn_rcv_synack(struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_synack() argument
272 if ((tp->ecn_flags & TCP_ECN_OK) && (!th->ece || th->cwr)) in tcp_ecn_rcv_synack()
273 tp->ecn_flags &= ~TCP_ECN_OK; in tcp_ecn_rcv_synack()
276 static void tcp_ecn_rcv_syn(struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_syn() argument
278 if ((tp->ecn_flags & TCP_ECN_OK) && (!th->ece || !th->cwr)) in tcp_ecn_rcv_syn()
279 tp->ecn_flags &= ~TCP_ECN_OK; in tcp_ecn_rcv_syn()
282 static bool tcp_ecn_rcv_ecn_echo(const struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_ecn_echo() argument
284 if (th->ece && !th->syn && (tp->ecn_flags & TCP_ECN_OK)) in tcp_ecn_rcv_ecn_echo()
296 const struct tcp_sock *tp = tcp_sk(sk); in tcp_sndbuf_expand() local
303 per_mss = max_t(u32, tp->rx_opt.mss_clamp, tp->mss_cache) + in tcp_sndbuf_expand()
310 nr_segs = max_t(u32, TCP_INIT_CWND, tp->snd_cwnd); in tcp_sndbuf_expand()
311 nr_segs = max_t(u32, nr_segs, tp->reordering + 1); in tcp_sndbuf_expand()
351 struct tcp_sock *tp = tcp_sk(sk); in __tcp_grow_window() local
356 while (tp->rcv_ssthresh <= window) { in __tcp_grow_window()
368 struct tcp_sock *tp = tcp_sk(sk); in tcp_grow_window() local
371 room = min_t(int, tp->window_clamp, tcp_space(sk)) - tp->rcv_ssthresh; in tcp_grow_window()
381 incr = 2 * tp->advmss; in tcp_grow_window()
387 tp->rcv_ssthresh += min(room, incr); in tcp_grow_window()
417 struct tcp_sock *tp = tcp_sk(sk); in tcp_init_buffer_space() local
425 tp->rcvq_space.space = tp->rcv_wnd; in tcp_init_buffer_space()
426 tp->rcvq_space.time = tcp_time_stamp; in tcp_init_buffer_space()
427 tp->rcvq_space.seq = tp->copied_seq; in tcp_init_buffer_space()
431 if (tp->window_clamp >= maxwin) { in tcp_init_buffer_space()
432 tp->window_clamp = maxwin; in tcp_init_buffer_space()
434 if (sysctl_tcp_app_win && maxwin > 4 * tp->advmss) in tcp_init_buffer_space()
435 tp->window_clamp = max(maxwin - in tcp_init_buffer_space()
437 4 * tp->advmss); in tcp_init_buffer_space()
442 tp->window_clamp > 2 * tp->advmss && in tcp_init_buffer_space()
443 tp->window_clamp + tp->advmss > maxwin) in tcp_init_buffer_space()
444 tp->window_clamp = max(2 * tp->advmss, maxwin - tp->advmss); in tcp_init_buffer_space()
446 tp->rcv_ssthresh = min(tp->rcv_ssthresh, tp->window_clamp); in tcp_init_buffer_space()
447 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_init_buffer_space()
453 struct tcp_sock *tp = tcp_sk(sk); in tcp_clamp_window() local
466 tp->rcv_ssthresh = min(tp->window_clamp, 2U * tp->advmss); in tcp_clamp_window()
478 const struct tcp_sock *tp = tcp_sk(sk); in tcp_initialize_rcv_mss() local
479 unsigned int hint = min_t(unsigned int, tp->advmss, tp->mss_cache); in tcp_initialize_rcv_mss()
481 hint = min(hint, tp->rcv_wnd / 2); in tcp_initialize_rcv_mss()
500 static void tcp_rcv_rtt_update(struct tcp_sock *tp, u32 sample, int win_dep) in tcp_rcv_rtt_update() argument
502 u32 new_sample = tp->rcv_rtt_est.rtt; in tcp_rcv_rtt_update()
532 if (tp->rcv_rtt_est.rtt != new_sample) in tcp_rcv_rtt_update()
533 tp->rcv_rtt_est.rtt = new_sample; in tcp_rcv_rtt_update()
536 static inline void tcp_rcv_rtt_measure(struct tcp_sock *tp) in tcp_rcv_rtt_measure() argument
538 if (tp->rcv_rtt_est.time == 0) in tcp_rcv_rtt_measure()
540 if (before(tp->rcv_nxt, tp->rcv_rtt_est.seq)) in tcp_rcv_rtt_measure()
542 tcp_rcv_rtt_update(tp, tcp_time_stamp - tp->rcv_rtt_est.time, 1); in tcp_rcv_rtt_measure()
545 tp->rcv_rtt_est.seq = tp->rcv_nxt + tp->rcv_wnd; in tcp_rcv_rtt_measure()
546 tp->rcv_rtt_est.time = tcp_time_stamp; in tcp_rcv_rtt_measure()
552 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_rtt_measure_ts() local
553 if (tp->rx_opt.rcv_tsecr && in tcp_rcv_rtt_measure_ts()
556 tcp_rcv_rtt_update(tp, tcp_time_stamp - tp->rx_opt.rcv_tsecr, 0); in tcp_rcv_rtt_measure_ts()
565 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_space_adjust() local
569 time = tcp_time_stamp - tp->rcvq_space.time; in tcp_rcv_space_adjust()
570 if (time < (tp->rcv_rtt_est.rtt >> 3) || tp->rcv_rtt_est.rtt == 0) in tcp_rcv_space_adjust()
574 copied = tp->copied_seq - tp->rcvq_space.seq; in tcp_rcv_space_adjust()
575 if (copied <= tp->rcvq_space.space) in tcp_rcv_space_adjust()
595 rcvwin = ((u64)copied << 1) + 16 * tp->advmss; in tcp_rcv_space_adjust()
603 tp->rcvq_space.space + (tp->rcvq_space.space >> 2)) { in tcp_rcv_space_adjust()
605 tp->rcvq_space.space + (tp->rcvq_space.space >> 1)) in tcp_rcv_space_adjust()
611 rcvmem = SKB_TRUESIZE(tp->advmss + MAX_TCP_HEADER); in tcp_rcv_space_adjust()
612 while (tcp_win_from_space(rcvmem) < tp->advmss) in tcp_rcv_space_adjust()
615 do_div(rcvwin, tp->advmss); in tcp_rcv_space_adjust()
621 tp->window_clamp = tcp_win_from_space(rcvbuf); in tcp_rcv_space_adjust()
624 tp->rcvq_space.space = copied; in tcp_rcv_space_adjust()
627 tp->rcvq_space.seq = tp->copied_seq; in tcp_rcv_space_adjust()
628 tp->rcvq_space.time = tcp_time_stamp; in tcp_rcv_space_adjust()
643 struct tcp_sock *tp = tcp_sk(sk); in tcp_event_data_recv() local
651 tcp_rcv_rtt_measure(tp); in tcp_event_data_recv()
698 struct tcp_sock *tp = tcp_sk(sk); in tcp_rtt_estimator() local
700 u32 srtt = tp->srtt_us; in tcp_rtt_estimator()
723 m -= (tp->mdev_us >> 2); /* similar update on mdev */ in tcp_rtt_estimator()
735 m -= (tp->mdev_us >> 2); /* similar update on mdev */ in tcp_rtt_estimator()
737 tp->mdev_us += m; /* mdev = 3/4 mdev + 1/4 new */ in tcp_rtt_estimator()
738 if (tp->mdev_us > tp->mdev_max_us) { in tcp_rtt_estimator()
739 tp->mdev_max_us = tp->mdev_us; in tcp_rtt_estimator()
740 if (tp->mdev_max_us > tp->rttvar_us) in tcp_rtt_estimator()
741 tp->rttvar_us = tp->mdev_max_us; in tcp_rtt_estimator()
743 if (after(tp->snd_una, tp->rtt_seq)) { in tcp_rtt_estimator()
744 if (tp->mdev_max_us < tp->rttvar_us) in tcp_rtt_estimator()
745 tp->rttvar_us -= (tp->rttvar_us - tp->mdev_max_us) >> 2; in tcp_rtt_estimator()
746 tp->rtt_seq = tp->snd_nxt; in tcp_rtt_estimator()
747 tp->mdev_max_us = tcp_rto_min_us(sk); in tcp_rtt_estimator()
752 tp->mdev_us = m << 1; /* make sure rto = 3*rtt */ in tcp_rtt_estimator()
753 tp->rttvar_us = max(tp->mdev_us, tcp_rto_min_us(sk)); in tcp_rtt_estimator()
754 tp->mdev_max_us = tp->rttvar_us; in tcp_rtt_estimator()
755 tp->rtt_seq = tp->snd_nxt; in tcp_rtt_estimator()
757 tp->srtt_us = max(1U, srtt); in tcp_rtt_estimator()
771 const struct tcp_sock *tp = tcp_sk(sk); in tcp_update_pacing_rate() local
775 rate = (u64)tp->mss_cache * ((USEC_PER_SEC / 100) << 3); in tcp_update_pacing_rate()
785 if (tp->snd_cwnd < tp->snd_ssthresh / 2) in tcp_update_pacing_rate()
790 rate *= max(tp->snd_cwnd, tp->packets_out); in tcp_update_pacing_rate()
792 if (likely(tp->srtt_us)) in tcp_update_pacing_rate()
793 do_div(rate, tp->srtt_us); in tcp_update_pacing_rate()
808 const struct tcp_sock *tp = tcp_sk(sk); in tcp_set_rto() local
819 inet_csk(sk)->icsk_rto = __tcp_set_rto(tp); in tcp_set_rto()
833 __u32 tcp_init_cwnd(const struct tcp_sock *tp, const struct dst_entry *dst) in tcp_init_cwnd() argument
839 return min_t(__u32, cwnd, tp->snd_cwnd_clamp); in tcp_init_cwnd()
846 void tcp_disable_fack(struct tcp_sock *tp) in tcp_disable_fack() argument
849 if (tcp_is_fack(tp)) in tcp_disable_fack()
850 tp->lost_skb_hint = NULL; in tcp_disable_fack()
851 tp->rx_opt.sack_ok &= ~TCP_FACK_ENABLED; in tcp_disable_fack()
855 static void tcp_dsack_seen(struct tcp_sock *tp) in tcp_dsack_seen() argument
857 tp->rx_opt.sack_ok |= TCP_DSACK_SEEN; in tcp_dsack_seen()
863 struct tcp_sock *tp = tcp_sk(sk); in tcp_update_reordering() local
864 if (metric > tp->reordering) { in tcp_update_reordering()
867 tp->reordering = min(sysctl_tcp_max_reordering, metric); in tcp_update_reordering()
872 else if (tcp_is_reno(tp)) in tcp_update_reordering()
874 else if (tcp_is_fack(tp)) in tcp_update_reordering()
882 tp->rx_opt.sack_ok, inet_csk(sk)->icsk_ca_state, in tcp_update_reordering()
883 tp->reordering, in tcp_update_reordering()
884 tp->fackets_out, in tcp_update_reordering()
885 tp->sacked_out, in tcp_update_reordering()
886 tp->undo_marker ? tp->undo_retrans : 0); in tcp_update_reordering()
888 tcp_disable_fack(tp); in tcp_update_reordering()
892 tcp_disable_early_retrans(tp); in tcp_update_reordering()
893 tp->rack.reord = 1; in tcp_update_reordering()
897 static void tcp_verify_retransmit_hint(struct tcp_sock *tp, struct sk_buff *skb) in tcp_verify_retransmit_hint() argument
899 if ((!tp->retransmit_skb_hint && tp->retrans_out >= tp->lost_out) || in tcp_verify_retransmit_hint()
900 (tp->retransmit_skb_hint && in tcp_verify_retransmit_hint()
902 TCP_SKB_CB(tp->retransmit_skb_hint)->seq))) in tcp_verify_retransmit_hint()
903 tp->retransmit_skb_hint = skb; in tcp_verify_retransmit_hint()
905 if (!tp->lost_out || in tcp_verify_retransmit_hint()
906 after(TCP_SKB_CB(skb)->end_seq, tp->retransmit_high)) in tcp_verify_retransmit_hint()
907 tp->retransmit_high = TCP_SKB_CB(skb)->end_seq; in tcp_verify_retransmit_hint()
910 static void tcp_skb_mark_lost(struct tcp_sock *tp, struct sk_buff *skb) in tcp_skb_mark_lost() argument
913 tcp_verify_retransmit_hint(tp, skb); in tcp_skb_mark_lost()
915 tp->lost_out += tcp_skb_pcount(skb); in tcp_skb_mark_lost()
920 void tcp_skb_mark_lost_uncond_verify(struct tcp_sock *tp, struct sk_buff *skb) in tcp_skb_mark_lost_uncond_verify() argument
922 tcp_verify_retransmit_hint(tp, skb); in tcp_skb_mark_lost_uncond_verify()
925 tp->lost_out += tcp_skb_pcount(skb); in tcp_skb_mark_lost_uncond_verify()
1024 static bool tcp_is_sackblock_valid(struct tcp_sock *tp, bool is_dsack, in tcp_is_sackblock_valid() argument
1028 if (after(end_seq, tp->snd_nxt) || !before(start_seq, end_seq)) in tcp_is_sackblock_valid()
1032 if (!before(start_seq, tp->snd_nxt)) in tcp_is_sackblock_valid()
1038 if (after(start_seq, tp->snd_una)) in tcp_is_sackblock_valid()
1041 if (!is_dsack || !tp->undo_marker) in tcp_is_sackblock_valid()
1045 if (after(end_seq, tp->snd_una)) in tcp_is_sackblock_valid()
1048 if (!before(start_seq, tp->undo_marker)) in tcp_is_sackblock_valid()
1052 if (!after(end_seq, tp->undo_marker)) in tcp_is_sackblock_valid()
1058 return !before(start_seq, end_seq - tp->max_window); in tcp_is_sackblock_valid()
1065 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_dsack() local
1072 tcp_dsack_seen(tp); in tcp_check_dsack()
1081 tcp_dsack_seen(tp); in tcp_check_dsack()
1088 if (dup_sack && tp->undo_marker && tp->undo_retrans > 0 && in tcp_check_dsack()
1090 after(end_seq_0, tp->undo_marker)) in tcp_check_dsack()
1091 tp->undo_retrans--; in tcp_check_dsack()
1170 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_one() local
1175 if (tp->undo_marker && tp->undo_retrans > 0 && in tcp_sacktag_one()
1176 after(end_seq, tp->undo_marker)) in tcp_sacktag_one()
1177 tp->undo_retrans--; in tcp_sacktag_one()
1183 if (!after(end_seq, tp->snd_una)) in tcp_sacktag_one()
1187 tcp_rack_advance(tp, xmit_time, sacked); in tcp_sacktag_one()
1196 tp->lost_out -= pcount; in tcp_sacktag_one()
1197 tp->retrans_out -= pcount; in tcp_sacktag_one()
1205 tcp_highest_sack_seq(tp))) in tcp_sacktag_one()
1208 if (!after(end_seq, tp->high_seq)) in tcp_sacktag_one()
1217 tp->lost_out -= pcount; in tcp_sacktag_one()
1223 tp->sacked_out += pcount; in tcp_sacktag_one()
1228 if (!tcp_is_fack(tp) && tp->lost_skb_hint && in tcp_sacktag_one()
1229 before(start_seq, TCP_SKB_CB(tp->lost_skb_hint)->seq)) in tcp_sacktag_one()
1230 tp->lost_cnt_hint += pcount; in tcp_sacktag_one()
1232 if (fack_count > tp->fackets_out) in tcp_sacktag_one()
1233 tp->fackets_out = fack_count; in tcp_sacktag_one()
1242 tp->retrans_out -= pcount; in tcp_sacktag_one()
1256 struct tcp_sock *tp = tcp_sk(sk); in tcp_shifted_skb() local
1273 if (skb == tp->lost_skb_hint) in tcp_shifted_skb()
1274 tp->lost_cnt_hint += pcount; in tcp_shifted_skb()
1306 if (skb == tp->retransmit_skb_hint) in tcp_shifted_skb()
1307 tp->retransmit_skb_hint = prev; in tcp_shifted_skb()
1308 if (skb == tp->lost_skb_hint) { in tcp_shifted_skb()
1309 tp->lost_skb_hint = prev; in tcp_shifted_skb()
1310 tp->lost_cnt_hint -= tcp_skb_pcount(prev); in tcp_shifted_skb()
1365 struct tcp_sock *tp = tcp_sk(sk); in tcp_shift_skb_data() local
1383 if (!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una)) in tcp_shift_skb_data()
1460 if (!after(TCP_SKB_CB(skb)->seq + len, tp->snd_una)) in tcp_shift_skb_data()
1505 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_walk() local
1564 tcp_highest_sack_seq(tp))) in tcp_sacktag_walk()
1611 static int tcp_sack_cache_ok(const struct tcp_sock *tp, const struct tcp_sack_block *cache) in tcp_sack_cache_ok() argument
1613 return cache < tp->recv_sack_cache + ARRAY_SIZE(tp->recv_sack_cache); in tcp_sack_cache_ok()
1620 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_write_queue() local
1634 state->reord = tp->packets_out; in tcp_sacktag_write_queue()
1636 if (!tp->sacked_out) { in tcp_sacktag_write_queue()
1637 if (WARN_ON(tp->fackets_out)) in tcp_sacktag_write_queue()
1638 tp->fackets_out = 0; in tcp_sacktag_write_queue()
1651 if (before(TCP_SKB_CB(ack_skb)->ack_seq, prior_snd_una - tp->max_window)) in tcp_sacktag_write_queue()
1654 if (!tp->packets_out) in tcp_sacktag_write_queue()
1665 if (!tcp_is_sackblock_valid(tp, dup_sack, in tcp_sacktag_write_queue()
1671 if (!tp->undo_marker) in tcp_sacktag_write_queue()
1677 if ((TCP_SKB_CB(ack_skb)->ack_seq != tp->snd_una) && in tcp_sacktag_write_queue()
1678 !after(sp[used_sacks].end_seq, tp->snd_una)) in tcp_sacktag_write_queue()
1716 if (!tp->sacked_out) { in tcp_sacktag_write_queue()
1718 cache = tp->recv_sack_cache + ARRAY_SIZE(tp->recv_sack_cache); in tcp_sacktag_write_queue()
1720 cache = tp->recv_sack_cache; in tcp_sacktag_write_queue()
1722 while (tcp_sack_cache_ok(tp, cache) && !cache->start_seq && in tcp_sacktag_write_queue()
1737 while (tcp_sack_cache_ok(tp, cache) && in tcp_sacktag_write_queue()
1742 if (tcp_sack_cache_ok(tp, cache) && !dup_sack && in tcp_sacktag_write_queue()
1765 if (tcp_highest_sack_seq(tp) == cache->end_seq) { in tcp_sacktag_write_queue()
1770 state->fack_count = tp->fackets_out; in tcp_sacktag_write_queue()
1781 if (!before(start_seq, tcp_highest_sack_seq(tp))) { in tcp_sacktag_write_queue()
1785 state->fack_count = tp->fackets_out; in tcp_sacktag_write_queue()
1798 for (i = 0; i < ARRAY_SIZE(tp->recv_sack_cache) - used_sacks; i++) { in tcp_sacktag_write_queue()
1799 tp->recv_sack_cache[i].start_seq = 0; in tcp_sacktag_write_queue()
1800 tp->recv_sack_cache[i].end_seq = 0; in tcp_sacktag_write_queue()
1803 tp->recv_sack_cache[i++] = sp[j]; in tcp_sacktag_write_queue()
1805 if ((state->reord < tp->fackets_out) && in tcp_sacktag_write_queue()
1806 ((inet_csk(sk)->icsk_ca_state != TCP_CA_Loss) || tp->undo_marker)) in tcp_sacktag_write_queue()
1807 tcp_update_reordering(sk, tp->fackets_out - state->reord, 0); in tcp_sacktag_write_queue()
1809 tcp_verify_left_out(tp); in tcp_sacktag_write_queue()
1813 WARN_ON((int)tp->sacked_out < 0); in tcp_sacktag_write_queue()
1814 WARN_ON((int)tp->lost_out < 0); in tcp_sacktag_write_queue()
1815 WARN_ON((int)tp->retrans_out < 0); in tcp_sacktag_write_queue()
1816 WARN_ON((int)tcp_packets_in_flight(tp) < 0); in tcp_sacktag_write_queue()
1824 static bool tcp_limit_reno_sacked(struct tcp_sock *tp) in tcp_limit_reno_sacked() argument
1828 holes = max(tp->lost_out, 1U); in tcp_limit_reno_sacked()
1829 holes = min(holes, tp->packets_out); in tcp_limit_reno_sacked()
1831 if ((tp->sacked_out + holes) > tp->packets_out) { in tcp_limit_reno_sacked()
1832 tp->sacked_out = tp->packets_out - holes; in tcp_limit_reno_sacked()
1844 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_reno_reordering() local
1845 if (tcp_limit_reno_sacked(tp)) in tcp_check_reno_reordering()
1846 tcp_update_reordering(sk, tp->packets_out + addend, 0); in tcp_check_reno_reordering()
1853 struct tcp_sock *tp = tcp_sk(sk); in tcp_add_reno_sack() local
1854 tp->sacked_out++; in tcp_add_reno_sack()
1856 tcp_verify_left_out(tp); in tcp_add_reno_sack()
1863 struct tcp_sock *tp = tcp_sk(sk); in tcp_remove_reno_sacks() local
1867 if (acked - 1 >= tp->sacked_out) in tcp_remove_reno_sacks()
1868 tp->sacked_out = 0; in tcp_remove_reno_sacks()
1870 tp->sacked_out -= acked - 1; in tcp_remove_reno_sacks()
1873 tcp_verify_left_out(tp); in tcp_remove_reno_sacks()
1876 static inline void tcp_reset_reno_sack(struct tcp_sock *tp) in tcp_reset_reno_sack() argument
1878 tp->sacked_out = 0; in tcp_reset_reno_sack()
1881 void tcp_clear_retrans(struct tcp_sock *tp) in tcp_clear_retrans() argument
1883 tp->retrans_out = 0; in tcp_clear_retrans()
1884 tp->lost_out = 0; in tcp_clear_retrans()
1885 tp->undo_marker = 0; in tcp_clear_retrans()
1886 tp->undo_retrans = -1; in tcp_clear_retrans()
1887 tp->fackets_out = 0; in tcp_clear_retrans()
1888 tp->sacked_out = 0; in tcp_clear_retrans()
1891 static inline void tcp_init_undo(struct tcp_sock *tp) in tcp_init_undo() argument
1893 tp->undo_marker = tp->snd_una; in tcp_init_undo()
1895 tp->undo_retrans = tp->retrans_out ? : -1; in tcp_init_undo()
1905 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_loss() local
1912 !after(tp->high_seq, tp->snd_una) || in tcp_enter_loss()
1914 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_enter_loss()
1915 tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk); in tcp_enter_loss()
1917 tcp_init_undo(tp); in tcp_enter_loss()
1919 tp->snd_cwnd = 1; in tcp_enter_loss()
1920 tp->snd_cwnd_cnt = 0; in tcp_enter_loss()
1921 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_enter_loss()
1923 tp->retrans_out = 0; in tcp_enter_loss()
1924 tp->lost_out = 0; in tcp_enter_loss()
1926 if (tcp_is_reno(tp)) in tcp_enter_loss()
1927 tcp_reset_reno_sack(tp); in tcp_enter_loss()
1933 tp->sacked_out = 0; in tcp_enter_loss()
1934 tp->fackets_out = 0; in tcp_enter_loss()
1936 tcp_clear_all_retrans_hints(tp); in tcp_enter_loss()
1946 tp->lost_out += tcp_skb_pcount(skb); in tcp_enter_loss()
1947 tp->retransmit_high = TCP_SKB_CB(skb)->end_seq; in tcp_enter_loss()
1950 tcp_verify_left_out(tp); in tcp_enter_loss()
1956 tp->sacked_out >= sysctl_tcp_reordering) in tcp_enter_loss()
1957 tp->reordering = min_t(unsigned int, tp->reordering, in tcp_enter_loss()
1960 tp->high_seq = tp->snd_nxt; in tcp_enter_loss()
1961 tcp_ecn_queue_cwr(tp); in tcp_enter_loss()
1967 tp->frto = sysctl_tcp_frto && in tcp_enter_loss()
1985 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_sack_reneging() local
1986 unsigned long delay = max(usecs_to_jiffies(tp->srtt_us >> 4), in tcp_check_sack_reneging()
1996 static inline int tcp_fackets_out(const struct tcp_sock *tp) in tcp_fackets_out() argument
1998 return tcp_is_reno(tp) ? tp->sacked_out + 1 : tp->fackets_out; in tcp_fackets_out()
2016 static inline int tcp_dupack_heuristics(const struct tcp_sock *tp) in tcp_dupack_heuristics() argument
2018 return tcp_is_fack(tp) ? tp->fackets_out : tp->sacked_out + 1; in tcp_dupack_heuristics()
2023 struct tcp_sock *tp = tcp_sk(sk); in tcp_pause_early_retransmit() local
2031 (flag & FLAG_ECE) || !tp->srtt_us) in tcp_pause_early_retransmit()
2034 delay = max(usecs_to_jiffies(tp->srtt_us >> 5), in tcp_pause_early_retransmit()
2140 struct tcp_sock *tp = tcp_sk(sk); in tcp_time_to_recover() local
2144 if (tp->lost_out) in tcp_time_to_recover()
2148 if (tcp_dupack_heuristics(tp) > tp->reordering) in tcp_time_to_recover()
2154 packets_out = tp->packets_out; in tcp_time_to_recover()
2155 if (packets_out <= tp->reordering && in tcp_time_to_recover()
2156 tp->sacked_out >= max_t(__u32, packets_out/2, sysctl_tcp_reordering) && in tcp_time_to_recover()
2169 if ((tp->thin_dupack || sysctl_tcp_thin_dupack) && in tcp_time_to_recover()
2170 tcp_stream_is_thin(tp) && tcp_dupack_heuristics(tp) > 1 && in tcp_time_to_recover()
2171 tcp_is_sack(tp) && !tcp_send_head(sk)) in tcp_time_to_recover()
2179 if (tp->do_early_retrans && !tp->retrans_out && tp->sacked_out && in tcp_time_to_recover()
2180 (tp->packets_out >= (tp->sacked_out + 1) && tp->packets_out < 4) && in tcp_time_to_recover()
2195 struct tcp_sock *tp = tcp_sk(sk); in tcp_mark_head_lost() local
2200 const u32 loss_high = tcp_is_sack(tp) ? tp->snd_nxt : tp->high_seq; in tcp_mark_head_lost()
2202 WARN_ON(packets > tp->packets_out); in tcp_mark_head_lost()
2203 if (tp->lost_skb_hint) { in tcp_mark_head_lost()
2204 skb = tp->lost_skb_hint; in tcp_mark_head_lost()
2205 cnt = tp->lost_cnt_hint; in tcp_mark_head_lost()
2219 tp->lost_skb_hint = skb; in tcp_mark_head_lost()
2220 tp->lost_cnt_hint = cnt; in tcp_mark_head_lost()
2226 if (tcp_is_fack(tp) || tcp_is_reno(tp) || in tcp_mark_head_lost()
2231 if ((tcp_is_sack(tp) && !tcp_is_fack(tp)) || in tcp_mark_head_lost()
2245 tcp_skb_mark_lost(tp, skb); in tcp_mark_head_lost()
2250 tcp_verify_left_out(tp); in tcp_mark_head_lost()
2257 struct tcp_sock *tp = tcp_sk(sk); in tcp_update_scoreboard() local
2259 if (tcp_is_reno(tp)) { in tcp_update_scoreboard()
2261 } else if (tcp_is_fack(tp)) { in tcp_update_scoreboard()
2262 int lost = tp->fackets_out - tp->reordering; in tcp_update_scoreboard()
2267 int sacked_upto = tp->sacked_out - tp->reordering; in tcp_update_scoreboard()
2278 static inline void tcp_moderate_cwnd(struct tcp_sock *tp) in tcp_moderate_cwnd() argument
2280 tp->snd_cwnd = min(tp->snd_cwnd, in tcp_moderate_cwnd()
2281 tcp_packets_in_flight(tp) + tcp_max_burst(tp)); in tcp_moderate_cwnd()
2282 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_moderate_cwnd()
2285 static bool tcp_tsopt_ecr_before(const struct tcp_sock *tp, u32 when) in tcp_tsopt_ecr_before() argument
2287 return tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_tsopt_ecr_before()
2288 before(tp->rx_opt.rcv_tsecr, when); in tcp_tsopt_ecr_before()
2294 static bool tcp_skb_spurious_retrans(const struct tcp_sock *tp, in tcp_skb_spurious_retrans() argument
2298 tcp_tsopt_ecr_before(tp, tcp_skb_timestamp(skb)); in tcp_skb_spurious_retrans()
2304 static inline bool tcp_packet_delayed(const struct tcp_sock *tp) in tcp_packet_delayed() argument
2306 return !tp->retrans_stamp || in tcp_packet_delayed()
2307 tcp_tsopt_ecr_before(tp, tp->retrans_stamp); in tcp_packet_delayed()
2328 const struct tcp_sock *tp = tcp_sk(sk); in tcp_any_retrans_done() local
2331 if (tp->retrans_out) in tcp_any_retrans_done()
2344 struct tcp_sock *tp = tcp_sk(sk); in DBGUNDO() local
2351 tp->snd_cwnd, tcp_left_out(tp), in DBGUNDO()
2352 tp->snd_ssthresh, tp->prior_ssthresh, in DBGUNDO()
2353 tp->packets_out); in DBGUNDO()
2360 tp->snd_cwnd, tcp_left_out(tp), in DBGUNDO()
2361 tp->snd_ssthresh, tp->prior_ssthresh, in DBGUNDO()
2362 tp->packets_out); in DBGUNDO()
2372 struct tcp_sock *tp = tcp_sk(sk); in tcp_undo_cwnd_reduction() local
2382 tp->lost_out = 0; in tcp_undo_cwnd_reduction()
2383 tcp_clear_all_retrans_hints(tp); in tcp_undo_cwnd_reduction()
2386 if (tp->prior_ssthresh) { in tcp_undo_cwnd_reduction()
2390 tp->snd_cwnd = icsk->icsk_ca_ops->undo_cwnd(sk); in tcp_undo_cwnd_reduction()
2392 tp->snd_cwnd = max(tp->snd_cwnd, tp->snd_ssthresh << 1); in tcp_undo_cwnd_reduction()
2394 if (tp->prior_ssthresh > tp->snd_ssthresh) { in tcp_undo_cwnd_reduction()
2395 tp->snd_ssthresh = tp->prior_ssthresh; in tcp_undo_cwnd_reduction()
2396 tcp_ecn_withdraw_cwr(tp); in tcp_undo_cwnd_reduction()
2399 tp->snd_cwnd = max(tp->snd_cwnd, tp->snd_ssthresh); in tcp_undo_cwnd_reduction()
2401 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_undo_cwnd_reduction()
2402 tp->undo_marker = 0; in tcp_undo_cwnd_reduction()
2405 static inline bool tcp_may_undo(const struct tcp_sock *tp) in tcp_may_undo() argument
2407 return tp->undo_marker && (!tp->undo_retrans || tcp_packet_delayed(tp)); in tcp_may_undo()
2413 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_recovery() local
2415 if (tcp_may_undo(tp)) { in tcp_try_undo_recovery()
2430 if (tp->snd_una == tp->high_seq && tcp_is_reno(tp)) { in tcp_try_undo_recovery()
2434 tcp_moderate_cwnd(tp); in tcp_try_undo_recovery()
2436 tp->retrans_stamp = 0; in tcp_try_undo_recovery()
2446 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_dsack() local
2448 if (tp->undo_marker && !tp->undo_retrans) { in tcp_try_undo_dsack()
2460 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_loss() local
2462 if (frto_undo || tcp_may_undo(tp)) { in tcp_try_undo_loss()
2471 if (frto_undo || tcp_is_sack(tp)) in tcp_try_undo_loss()
2489 struct tcp_sock *tp = tcp_sk(sk); in tcp_init_cwnd_reduction() local
2491 tp->high_seq = tp->snd_nxt; in tcp_init_cwnd_reduction()
2492 tp->tlp_high_seq = 0; in tcp_init_cwnd_reduction()
2493 tp->snd_cwnd_cnt = 0; in tcp_init_cwnd_reduction()
2494 tp->prior_cwnd = tp->snd_cwnd; in tcp_init_cwnd_reduction()
2495 tp->prr_delivered = 0; in tcp_init_cwnd_reduction()
2496 tp->prr_out = 0; in tcp_init_cwnd_reduction()
2497 tp->snd_ssthresh = inet_csk(sk)->icsk_ca_ops->ssthresh(sk); in tcp_init_cwnd_reduction()
2498 tcp_ecn_queue_cwr(tp); in tcp_init_cwnd_reduction()
2504 struct tcp_sock *tp = tcp_sk(sk); in tcp_cwnd_reduction() local
2506 int delta = tp->snd_ssthresh - tcp_packets_in_flight(tp); in tcp_cwnd_reduction()
2508 (tp->packets_out - tp->sacked_out); in tcp_cwnd_reduction()
2510 if (newly_acked_sacked <= 0 || WARN_ON_ONCE(!tp->prior_cwnd)) in tcp_cwnd_reduction()
2513 tp->prr_delivered += newly_acked_sacked; in tcp_cwnd_reduction()
2515 u64 dividend = (u64)tp->snd_ssthresh * tp->prr_delivered + in tcp_cwnd_reduction()
2516 tp->prior_cwnd - 1; in tcp_cwnd_reduction()
2517 sndcnt = div_u64(dividend, tp->prior_cwnd) - tp->prr_out; in tcp_cwnd_reduction()
2521 max_t(int, tp->prr_delivered - tp->prr_out, in tcp_cwnd_reduction()
2527 tp->snd_cwnd = tcp_packets_in_flight(tp) + sndcnt; in tcp_cwnd_reduction()
2532 struct tcp_sock *tp = tcp_sk(sk); in tcp_end_cwnd_reduction() local
2535 if (tp->snd_ssthresh < TCP_INFINITE_SSTHRESH && in tcp_end_cwnd_reduction()
2536 (inet_csk(sk)->icsk_ca_state == TCP_CA_CWR || tp->undo_marker)) { in tcp_end_cwnd_reduction()
2537 tp->snd_cwnd = tp->snd_ssthresh; in tcp_end_cwnd_reduction()
2538 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_end_cwnd_reduction()
2546 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_cwr() local
2548 tp->prior_ssthresh = 0; in tcp_enter_cwr()
2550 tp->undo_marker = 0; in tcp_enter_cwr()
2559 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_keep_open() local
2562 if (tcp_left_out(tp) || tcp_any_retrans_done(sk)) in tcp_try_keep_open()
2567 tp->high_seq = tp->snd_nxt; in tcp_try_keep_open()
2573 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_to_open() local
2575 tcp_verify_left_out(tp); in tcp_try_to_open()
2578 tp->retrans_stamp = 0; in tcp_try_to_open()
2601 struct tcp_sock *tp = tcp_sk(sk); in tcp_mtup_probe_success() local
2605 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_mtup_probe_success()
2606 tp->snd_cwnd = tp->snd_cwnd * in tcp_mtup_probe_success()
2607 tcp_mss_to_mtu(sk, tp->mss_cache) / in tcp_mtup_probe_success()
2609 tp->snd_cwnd_cnt = 0; in tcp_mtup_probe_success()
2610 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_mtup_probe_success()
2611 tp->snd_ssthresh = tcp_current_ssthresh(sk); in tcp_mtup_probe_success()
2626 struct tcp_sock *tp = tcp_sk(sk); in tcp_simple_retransmit() local
2629 u32 prior_lost = tp->lost_out; in tcp_simple_retransmit()
2638 tp->retrans_out -= tcp_skb_pcount(skb); in tcp_simple_retransmit()
2640 tcp_skb_mark_lost_uncond_verify(tp, skb); in tcp_simple_retransmit()
2644 tcp_clear_retrans_hints_partial(tp); in tcp_simple_retransmit()
2646 if (prior_lost == tp->lost_out) in tcp_simple_retransmit()
2649 if (tcp_is_reno(tp)) in tcp_simple_retransmit()
2650 tcp_limit_reno_sacked(tp); in tcp_simple_retransmit()
2652 tcp_verify_left_out(tp); in tcp_simple_retransmit()
2660 tp->high_seq = tp->snd_nxt; in tcp_simple_retransmit()
2661 tp->snd_ssthresh = tcp_current_ssthresh(sk); in tcp_simple_retransmit()
2662 tp->prior_ssthresh = 0; in tcp_simple_retransmit()
2663 tp->undo_marker = 0; in tcp_simple_retransmit()
2672 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_recovery() local
2675 if (tcp_is_reno(tp)) in tcp_enter_recovery()
2682 tp->prior_ssthresh = 0; in tcp_enter_recovery()
2683 tcp_init_undo(tp); in tcp_enter_recovery()
2687 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_enter_recovery()
2698 struct tcp_sock *tp = tcp_sk(sk); in tcp_process_loss() local
2699 bool recovered = !before(tp->snd_una, tp->high_seq); in tcp_process_loss()
2705 if (tp->frto) { /* F-RTO RFC5682 sec 3.1 (sack enhanced version). */ in tcp_process_loss()
2713 if (after(tp->snd_nxt, tp->high_seq)) { in tcp_process_loss()
2715 tp->frto = 0; /* Step 3.a. loss was real */ in tcp_process_loss()
2717 tp->high_seq = tp->snd_nxt; in tcp_process_loss()
2720 if (after(tp->snd_nxt, tp->high_seq)) in tcp_process_loss()
2722 tp->frto = 0; in tcp_process_loss()
2731 if (tcp_is_reno(tp)) { in tcp_process_loss()
2735 if (after(tp->snd_nxt, tp->high_seq) && is_dupack) in tcp_process_loss()
2738 tcp_reset_reno_sack(tp); in tcp_process_loss()
2747 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_partial() local
2749 if (tp->undo_marker && tcp_packet_delayed(tp)) { in tcp_try_undo_partial()
2753 tcp_update_reordering(sk, tcp_fackets_out(tp) + acked, 1); in tcp_try_undo_partial()
2760 if (tp->retrans_out) { in tcp_try_undo_partial()
2766 tp->retrans_stamp = 0; in tcp_try_undo_partial()
2793 struct tcp_sock *tp = tcp_sk(sk); in tcp_fastretrans_alert() local
2795 (tcp_fackets_out(tp) > tp->reordering)); in tcp_fastretrans_alert()
2798 if (WARN_ON(!tp->packets_out && tp->sacked_out)) in tcp_fastretrans_alert()
2799 tp->sacked_out = 0; in tcp_fastretrans_alert()
2800 if (WARN_ON(!tp->sacked_out && tp->fackets_out)) in tcp_fastretrans_alert()
2801 tp->fackets_out = 0; in tcp_fastretrans_alert()
2806 tp->prior_ssthresh = 0; in tcp_fastretrans_alert()
2813 tcp_verify_left_out(tp); in tcp_fastretrans_alert()
2818 WARN_ON(tp->retrans_out != 0); in tcp_fastretrans_alert()
2819 tp->retrans_stamp = 0; in tcp_fastretrans_alert()
2820 } else if (!before(tp->snd_una, tp->high_seq)) { in tcp_fastretrans_alert()
2825 if (tp->snd_una != tp->high_seq) { in tcp_fastretrans_alert()
2832 if (tcp_is_reno(tp)) in tcp_fastretrans_alert()
2833 tcp_reset_reno_sack(tp); in tcp_fastretrans_alert()
2850 if (tcp_is_reno(tp) && is_dupack) in tcp_fastretrans_alert()
2856 do_lost = tcp_is_reno(tp) || in tcp_fastretrans_alert()
2857 tcp_fackets_out(tp) > tp->reordering; in tcp_fastretrans_alert()
2871 if (tcp_is_reno(tp)) { in tcp_fastretrans_alert()
2873 tcp_reset_reno_sack(tp); in tcp_fastretrans_alert()
2889 tp->snd_una == tp->mtu_probe.probe_seq_start) { in tcp_fastretrans_alert()
2892 tp->snd_cwnd++; in tcp_fastretrans_alert()
2975 const struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_update_rtt() local
2991 if (seq_rtt_us < 0 && tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_ack_update_rtt()
2994 tp->rx_opt.rcv_tsecr); in tcp_ack_update_rtt()
3041 struct tcp_sock *tp = tcp_sk(sk); in tcp_rearm_rto() local
3046 if (tp->fastopen_rsk) in tcp_rearm_rto()
3049 if (!tp->packets_out) { in tcp_rearm_rto()
3075 struct tcp_sock *tp = tcp_sk(sk); in tcp_resume_early_retransmit() local
3080 if (!tp->do_early_retrans) in tcp_resume_early_retransmit()
3091 struct tcp_sock *tp = tcp_sk(sk); in tcp_tso_acked() local
3094 BUG_ON(!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una)); in tcp_tso_acked()
3097 if (tcp_trim_head(sk, skb, tp->snd_una - TCP_SKB_CB(skb)->seq)) in tcp_tso_acked()
3134 struct tcp_sock *tp = tcp_sk(sk); in tcp_clean_rtx_queue() local
3135 u32 prior_sacked = tp->sacked_out; in tcp_clean_rtx_queue()
3136 u32 reord = tp->packets_out; in tcp_clean_rtx_queue()
3156 if (after(scb->end_seq, tp->snd_una)) { in tcp_clean_rtx_queue()
3158 !after(tp->snd_una, scb->seq)) in tcp_clean_rtx_queue()
3174 tp->retrans_out -= acked_pcount; in tcp_clean_rtx_queue()
3183 if (!after(scb->end_seq, tp->high_seq)) in tcp_clean_rtx_queue()
3188 tp->sacked_out -= acked_pcount; in tcp_clean_rtx_queue()
3189 else if (tcp_is_sack(tp) && !tcp_skb_spurious_retrans(tp, skb)) in tcp_clean_rtx_queue()
3190 tcp_rack_advance(tp, &skb->skb_mstamp, sacked); in tcp_clean_rtx_queue()
3192 tp->lost_out -= acked_pcount; in tcp_clean_rtx_queue()
3194 tp->packets_out -= acked_pcount; in tcp_clean_rtx_queue()
3208 tp->retrans_stamp = 0; in tcp_clean_rtx_queue()
3216 if (unlikely(skb == tp->retransmit_skb_hint)) in tcp_clean_rtx_queue()
3217 tp->retransmit_skb_hint = NULL; in tcp_clean_rtx_queue()
3218 if (unlikely(skb == tp->lost_skb_hint)) in tcp_clean_rtx_queue()
3219 tp->lost_skb_hint = NULL; in tcp_clean_rtx_queue()
3222 if (likely(between(tp->snd_up, prior_snd_una, tp->snd_una))) in tcp_clean_rtx_queue()
3223 tp->snd_up = tp->snd_una; in tcp_clean_rtx_queue()
3244 !after(tp->mtu_probe.probe_seq_end, tp->snd_una))) { in tcp_clean_rtx_queue()
3248 if (tcp_is_reno(tp)) { in tcp_clean_rtx_queue()
3263 if (reord < prior_fackets && reord <= tp->fackets_out) in tcp_clean_rtx_queue()
3264 tcp_update_reordering(sk, tp->fackets_out - reord, 0); in tcp_clean_rtx_queue()
3266 delta = tcp_is_fack(tp) ? pkts_acked : in tcp_clean_rtx_queue()
3267 prior_sacked - tp->sacked_out; in tcp_clean_rtx_queue()
3268 tp->lost_cnt_hint -= min(tp->lost_cnt_hint, delta); in tcp_clean_rtx_queue()
3271 tp->fackets_out -= min(pkts_acked, tp->fackets_out); in tcp_clean_rtx_queue()
3286 WARN_ON((int)tp->sacked_out < 0); in tcp_clean_rtx_queue()
3287 WARN_ON((int)tp->lost_out < 0); in tcp_clean_rtx_queue()
3288 WARN_ON((int)tp->retrans_out < 0); in tcp_clean_rtx_queue()
3289 if (!tp->packets_out && tcp_is_sack(tp)) { in tcp_clean_rtx_queue()
3291 if (tp->lost_out) { in tcp_clean_rtx_queue()
3293 tp->lost_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3294 tp->lost_out = 0; in tcp_clean_rtx_queue()
3296 if (tp->sacked_out) { in tcp_clean_rtx_queue()
3298 tp->sacked_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3299 tp->sacked_out = 0; in tcp_clean_rtx_queue()
3301 if (tp->retrans_out) { in tcp_clean_rtx_queue()
3303 tp->retrans_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3304 tp->retrans_out = 0; in tcp_clean_rtx_queue()
3313 const struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_probe() local
3318 if (!after(TCP_SKB_CB(tcp_send_head(sk))->end_seq, tcp_wnd_end(tp))) { in tcp_ack_probe()
3359 static inline bool tcp_may_update_window(const struct tcp_sock *tp, in tcp_may_update_window() argument
3363 return after(ack, tp->snd_una) || in tcp_may_update_window()
3364 after(ack_seq, tp->snd_wl1) || in tcp_may_update_window()
3365 (ack_seq == tp->snd_wl1 && nwin > tp->snd_wnd); in tcp_may_update_window()
3369 static void tcp_snd_una_update(struct tcp_sock *tp, u32 ack) in tcp_snd_una_update() argument
3371 u32 delta = ack - tp->snd_una; in tcp_snd_una_update()
3373 u64_stats_update_begin(&tp->syncp); in tcp_snd_una_update()
3374 tp->bytes_acked += delta; in tcp_snd_una_update()
3375 u64_stats_update_end(&tp->syncp); in tcp_snd_una_update()
3376 tp->snd_una = ack; in tcp_snd_una_update()
3380 static void tcp_rcv_nxt_update(struct tcp_sock *tp, u32 seq) in tcp_rcv_nxt_update() argument
3382 u32 delta = seq - tp->rcv_nxt; in tcp_rcv_nxt_update()
3384 u64_stats_update_begin(&tp->syncp); in tcp_rcv_nxt_update()
3385 tp->bytes_received += delta; in tcp_rcv_nxt_update()
3386 u64_stats_update_end(&tp->syncp); in tcp_rcv_nxt_update()
3387 tp->rcv_nxt = seq; in tcp_rcv_nxt_update()
3398 struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_update_window() local
3403 nwin <<= tp->rx_opt.snd_wscale; in tcp_ack_update_window()
3405 if (tcp_may_update_window(tp, ack, ack_seq, nwin)) { in tcp_ack_update_window()
3407 tcp_update_wl(tp, ack_seq); in tcp_ack_update_window()
3409 if (tp->snd_wnd != nwin) { in tcp_ack_update_window()
3410 tp->snd_wnd = nwin; in tcp_ack_update_window()
3415 tp->pred_flags = 0; in tcp_ack_update_window()
3421 if (nwin > tp->max_window) { in tcp_ack_update_window()
3422 tp->max_window = nwin; in tcp_ack_update_window()
3428 tcp_snd_una_update(tp, ack); in tcp_ack_update_window()
3474 struct tcp_sock *tp = tcp_sk(sk); in tcp_send_challenge_ack() local
3480 &tp->last_oow_ack_time)) in tcp_send_challenge_ack()
3500 static void tcp_store_ts_recent(struct tcp_sock *tp) in tcp_store_ts_recent() argument
3502 tp->rx_opt.ts_recent = tp->rx_opt.rcv_tsval; in tcp_store_ts_recent()
3503 tp->rx_opt.ts_recent_stamp = get_seconds(); in tcp_store_ts_recent()
3506 static void tcp_replace_ts_recent(struct tcp_sock *tp, u32 seq) in tcp_replace_ts_recent() argument
3508 if (tp->rx_opt.saw_tstamp && !after(seq, tp->rcv_wup)) { in tcp_replace_ts_recent()
3516 if (tcp_paws_check(&tp->rx_opt, 0)) in tcp_replace_ts_recent()
3517 tcp_store_ts_recent(tp); in tcp_replace_ts_recent()
3526 struct tcp_sock *tp = tcp_sk(sk); in tcp_process_tlp_ack() local
3528 if (before(ack, tp->tlp_high_seq)) in tcp_process_tlp_ack()
3531 if (!tp->tlp_retrans) { in tcp_process_tlp_ack()
3533 tp->tlp_high_seq = 0; in tcp_process_tlp_ack()
3536 tp->tlp_high_seq = 0; in tcp_process_tlp_ack()
3537 } else if (after(ack, tp->tlp_high_seq)) { in tcp_process_tlp_ack()
3550 tp->tlp_high_seq = 0; in tcp_process_tlp_ack()
3566 struct tcp_sock *tp = tcp_sk(sk); in tcp_ack() local
3568 u32 prior_snd_una = tp->snd_una; in tcp_ack()
3573 int prior_packets = tp->packets_out; in tcp_ack()
3574 const int prior_unsacked = tp->packets_out - tp->sacked_out; in tcp_ack()
3587 if (before(ack, prior_snd_una - tp->max_window)) { in tcp_ack()
3598 if (after(ack, tp->snd_nxt)) in tcp_ack()
3610 prior_fackets = tp->fackets_out; in tcp_ack()
3616 tcp_replace_ts_recent(tp, TCP_SKB_CB(skb)->seq); in tcp_ack()
3623 tcp_update_wl(tp, ack_seq); in tcp_ack()
3624 tcp_snd_una_update(tp, ack); in tcp_ack()
3644 if (tcp_ecn_rcv_ecn_echo(tp, tcp_hdr(skb))) { in tcp_ack()
3660 tp->rcv_tstamp = tcp_time_stamp; in tcp_ack()
3665 acked = tp->packets_out; in tcp_ack()
3668 acked -= tp->packets_out; in tcp_ack()
3675 if (tp->tlp_high_seq) in tcp_ack()
3705 if (tp->tlp_high_seq) in tcp_ack()
3710 SOCK_DEBUG(sk, "Ack %u after %u:%u\n", ack, tp->snd_una, tp->snd_nxt); in tcp_ack()
3724 SOCK_DEBUG(sk, "Ack %u before %u:%u\n", ack, tp->snd_una, tp->snd_nxt); in tcp_ack()
3860 static bool tcp_parse_aligned_timestamp(struct tcp_sock *tp, const struct tcphdr *th) in tcp_parse_aligned_timestamp() argument
3866 tp->rx_opt.saw_tstamp = 1; in tcp_parse_aligned_timestamp()
3868 tp->rx_opt.rcv_tsval = ntohl(*ptr); in tcp_parse_aligned_timestamp()
3871 tp->rx_opt.rcv_tsecr = ntohl(*ptr) - tp->tsoffset; in tcp_parse_aligned_timestamp()
3873 tp->rx_opt.rcv_tsecr = 0; in tcp_parse_aligned_timestamp()
3883 const struct tcphdr *th, struct tcp_sock *tp) in tcp_fast_parse_options() argument
3889 tp->rx_opt.saw_tstamp = 0; in tcp_fast_parse_options()
3891 } else if (tp->rx_opt.tstamp_ok && in tcp_fast_parse_options()
3893 if (tcp_parse_aligned_timestamp(tp, th)) in tcp_fast_parse_options()
3897 tcp_parse_options(skb, &tp->rx_opt, 1, NULL); in tcp_fast_parse_options()
3898 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr) in tcp_fast_parse_options()
3899 tp->rx_opt.rcv_tsecr -= tp->tsoffset; in tcp_fast_parse_options()
3964 const struct tcp_sock *tp = tcp_sk(sk); in tcp_disordered_ack() local
3970 (th->ack && seq == TCP_SKB_CB(skb)->end_seq && seq == tp->rcv_nxt) && in tcp_disordered_ack()
3973 ack == tp->snd_una && in tcp_disordered_ack()
3976 !tcp_may_update_window(tp, ack, seq, ntohs(th->window) << tp->rx_opt.snd_wscale) && in tcp_disordered_ack()
3979 (s32)(tp->rx_opt.ts_recent - tp->rx_opt.rcv_tsval) <= (inet_csk(sk)->icsk_rto * 1024) / HZ); in tcp_disordered_ack()
3985 const struct tcp_sock *tp = tcp_sk(sk); in tcp_paws_discard() local
3987 return !tcp_paws_check(&tp->rx_opt, TCP_PAWS_WINDOW) && in tcp_paws_discard()
4004 static inline bool tcp_sequence(const struct tcp_sock *tp, u32 seq, u32 end_seq) in tcp_sequence() argument
4006 return !before(end_seq, tp->rcv_wup) && in tcp_sequence()
4007 !after(seq, tp->rcv_nxt + tcp_receive_window(tp)); in tcp_sequence()
4051 struct tcp_sock *tp = tcp_sk(sk); in tcp_fin() local
4101 skb_rbtree_purge(&tp->out_of_order_queue); in tcp_fin()
4102 if (tcp_is_sack(tp)) in tcp_fin()
4103 tcp_sack_reset(&tp->rx_opt); in tcp_fin()
4133 struct tcp_sock *tp = tcp_sk(sk); in tcp_dsack_set() local
4135 if (tcp_is_sack(tp) && sysctl_tcp_dsack) { in tcp_dsack_set()
4138 if (before(seq, tp->rcv_nxt)) in tcp_dsack_set()
4145 tp->rx_opt.dsack = 1; in tcp_dsack_set()
4146 tp->duplicate_sack[0].start_seq = seq; in tcp_dsack_set()
4147 tp->duplicate_sack[0].end_seq = end_seq; in tcp_dsack_set()
4153 struct tcp_sock *tp = tcp_sk(sk); in tcp_dsack_extend() local
4155 if (!tp->rx_opt.dsack) in tcp_dsack_extend()
4158 tcp_sack_extend(tp->duplicate_sack, seq, end_seq); in tcp_dsack_extend()
4163 struct tcp_sock *tp = tcp_sk(sk); in tcp_send_dupack() local
4166 before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { in tcp_send_dupack()
4170 if (tcp_is_sack(tp) && sysctl_tcp_dsack) { in tcp_send_dupack()
4173 if (after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) in tcp_send_dupack()
4174 end_seq = tp->rcv_nxt; in tcp_send_dupack()
4185 static void tcp_sack_maybe_coalesce(struct tcp_sock *tp) in tcp_sack_maybe_coalesce() argument
4188 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_maybe_coalesce()
4194 for (this_sack = 1; this_sack < tp->rx_opt.num_sacks;) { in tcp_sack_maybe_coalesce()
4201 tp->rx_opt.num_sacks--; in tcp_sack_maybe_coalesce()
4202 for (i = this_sack; i < tp->rx_opt.num_sacks; i++) in tcp_sack_maybe_coalesce()
4212 struct tcp_sock *tp = tcp_sk(sk); in tcp_sack_new_ofo_skb() local
4213 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_new_ofo_skb()
4214 int cur_sacks = tp->rx_opt.num_sacks; in tcp_sack_new_ofo_skb()
4226 tcp_sack_maybe_coalesce(tp); in tcp_sack_new_ofo_skb()
4239 tp->rx_opt.num_sacks--; in tcp_sack_new_ofo_skb()
4249 tp->rx_opt.num_sacks++; in tcp_sack_new_ofo_skb()
4254 static void tcp_sack_remove(struct tcp_sock *tp) in tcp_sack_remove() argument
4256 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_remove()
4257 int num_sacks = tp->rx_opt.num_sacks; in tcp_sack_remove()
4261 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in tcp_sack_remove()
4262 tp->rx_opt.num_sacks = 0; in tcp_sack_remove()
4268 if (!before(tp->rcv_nxt, sp->start_seq)) { in tcp_sack_remove()
4272 WARN_ON(before(tp->rcv_nxt, sp->end_seq)); in tcp_sack_remove()
4276 tp->selective_acks[i-1] = tp->selective_acks[i]; in tcp_sack_remove()
4283 tp->rx_opt.num_sacks = num_sacks; in tcp_sack_remove()
4352 struct tcp_sock *tp = tcp_sk(sk); in tcp_ofo_queue() local
4353 __u32 dsack_high = tp->rcv_nxt; in tcp_ofo_queue()
4358 p = rb_first(&tp->out_of_order_queue); in tcp_ofo_queue()
4361 if (after(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) in tcp_ofo_queue()
4371 rb_erase(&skb->rbnode, &tp->out_of_order_queue); in tcp_ofo_queue()
4373 if (unlikely(!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt))) { in tcp_ofo_queue()
4379 tp->rcv_nxt, TCP_SKB_CB(skb)->seq, in tcp_ofo_queue()
4384 tcp_rcv_nxt_update(tp, TCP_SKB_CB(skb)->end_seq); in tcp_ofo_queue()
4426 struct tcp_sock *tp = tcp_sk(sk); in tcp_data_queue_ofo() local
4441 tp->pred_flags = 0; in tcp_data_queue_ofo()
4448 tp->rcv_nxt, seq, end_seq); in tcp_data_queue_ofo()
4450 p = &tp->out_of_order_queue.rb_node; in tcp_data_queue_ofo()
4451 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in tcp_data_queue_ofo()
4453 if (tcp_is_sack(tp)) { in tcp_data_queue_ofo()
4454 tp->rx_opt.num_sacks = 1; in tcp_data_queue_ofo()
4455 tp->selective_acks[0].start_seq = seq; in tcp_data_queue_ofo()
4456 tp->selective_acks[0].end_seq = end_seq; in tcp_data_queue_ofo()
4459 rb_insert_color(&skb->rbnode, &tp->out_of_order_queue); in tcp_data_queue_ofo()
4460 tp->ooo_last_skb = skb; in tcp_data_queue_ofo()
4467 if (tcp_ooo_try_coalesce(sk, tp->ooo_last_skb, in tcp_data_queue_ofo()
4473 if (tcp_is_sack(tp)) in tcp_data_queue_ofo()
4508 &tp->out_of_order_queue); in tcp_data_queue_ofo()
4526 rb_insert_color(&skb->rbnode, &tp->out_of_order_queue); in tcp_data_queue_ofo()
4539 rb_erase(&skb1->rbnode, &tp->out_of_order_queue); in tcp_data_queue_ofo()
4547 tp->ooo_last_skb = skb; in tcp_data_queue_ofo()
4550 if (tcp_is_sack(tp)) in tcp_data_queue_ofo()
4557 if (tcp_is_sack(tp)) in tcp_data_queue_ofo()
4632 struct tcp_sock *tp = tcp_sk(sk); in tcp_data_queue() local
4643 tcp_ecn_accept_cwr(tp, skb); in tcp_data_queue()
4645 tp->rx_opt.dsack = 0; in tcp_data_queue()
4651 if (TCP_SKB_CB(skb)->seq == tp->rcv_nxt) { in tcp_data_queue()
4652 if (tcp_receive_window(tp) == 0) in tcp_data_queue()
4656 if (tp->ucopy.task == current && in tcp_data_queue()
4657 tp->copied_seq == tp->rcv_nxt && tp->ucopy.len && in tcp_data_queue()
4658 sock_owned_by_user(sk) && !tp->urg_data) { in tcp_data_queue()
4660 tp->ucopy.len); in tcp_data_queue()
4665 if (!skb_copy_datagram_msg(skb, 0, tp->ucopy.msg, chunk)) { in tcp_data_queue()
4666 tp->ucopy.len -= chunk; in tcp_data_queue()
4667 tp->copied_seq += chunk; in tcp_data_queue()
4684 tcp_rcv_nxt_update(tp, TCP_SKB_CB(skb)->end_seq); in tcp_data_queue()
4690 if (!RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in tcp_data_queue()
4696 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) in tcp_data_queue()
4700 if (tp->rx_opt.num_sacks) in tcp_data_queue()
4701 tcp_sack_remove(tp); in tcp_data_queue()
4712 if (!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) { in tcp_data_queue()
4726 if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt + tcp_receive_window(tp))) in tcp_data_queue()
4729 if (before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { in tcp_data_queue()
4732 tp->rcv_nxt, TCP_SKB_CB(skb)->seq, in tcp_data_queue()
4735 tcp_dsack_set(sk, TCP_SKB_CB(skb)->seq, tp->rcv_nxt); in tcp_data_queue()
4740 if (!tcp_receive_window(tp)) in tcp_data_queue()
4899 struct tcp_sock *tp = tcp_sk(sk); in tcp_collapse_ofo_queue() local
4905 p = rb_first(&tp->out_of_order_queue); in tcp_collapse_ofo_queue()
4909 p = rb_last(&tp->out_of_order_queue); in tcp_collapse_ofo_queue()
4914 tp->ooo_last_skb = rb_entry(p, struct sk_buff, rbnode); in tcp_collapse_ofo_queue()
4933 tcp_collapse(sk, NULL, &tp->out_of_order_queue, in tcp_collapse_ofo_queue()
4959 struct tcp_sock *tp = tcp_sk(sk); in tcp_prune_ofo_queue() local
4963 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) in tcp_prune_ofo_queue()
4968 node = &tp->ooo_last_skb->rbnode; in tcp_prune_ofo_queue()
4971 rb_erase(node, &tp->out_of_order_queue); in tcp_prune_ofo_queue()
4984 tp->ooo_last_skb = rb_entry(prev, struct sk_buff, rbnode); in tcp_prune_ofo_queue()
4991 if (tp->rx_opt.sack_ok) in tcp_prune_ofo_queue()
4992 tcp_sack_reset(&tp->rx_opt); in tcp_prune_ofo_queue()
5006 struct tcp_sock *tp = tcp_sk(sk); in tcp_prune_queue() local
5008 SOCK_DEBUG(sk, "prune_queue: c=%x\n", tp->copied_seq); in tcp_prune_queue()
5015 tp->rcv_ssthresh = min(tp->rcv_ssthresh, 4U * tp->advmss); in tcp_prune_queue()
5025 tp->copied_seq, tp->rcv_nxt); in tcp_prune_queue()
5046 tp->pred_flags = 0; in tcp_prune_queue()
5052 const struct tcp_sock *tp = tcp_sk(sk); in tcp_should_expand_sndbuf() local
5069 if (tcp_packets_in_flight(tp) >= tp->snd_cwnd) in tcp_should_expand_sndbuf()
5083 struct tcp_sock *tp = tcp_sk(sk); in tcp_new_space() local
5087 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_new_space()
5116 struct tcp_sock *tp = tcp_sk(sk); in __tcp_ack_snd_check() local
5119 if (((tp->rcv_nxt - tp->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss && in __tcp_ack_snd_check()
5123 __tcp_select_window(sk) >= tp->rcv_wnd) || in __tcp_ack_snd_check()
5127 (ofo_possible && !RB_EMPTY_ROOT(&tp->out_of_order_queue))) { in __tcp_ack_snd_check()
5157 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_urg() local
5165 if (after(tp->copied_seq, ptr)) in tcp_check_urg()
5178 if (before(ptr, tp->rcv_nxt)) in tcp_check_urg()
5182 if (tp->urg_data && !after(ptr, tp->urg_seq)) in tcp_check_urg()
5203 if (tp->urg_seq == tp->copied_seq && tp->urg_data && in tcp_check_urg()
5204 !sock_flag(sk, SOCK_URGINLINE) && tp->copied_seq != tp->rcv_nxt) { in tcp_check_urg()
5206 tp->copied_seq++; in tcp_check_urg()
5207 if (skb && !before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq)) { in tcp_check_urg()
5213 tp->urg_data = TCP_URG_NOTYET; in tcp_check_urg()
5214 tp->urg_seq = ptr; in tcp_check_urg()
5217 tp->pred_flags = 0; in tcp_check_urg()
5223 struct tcp_sock *tp = tcp_sk(sk); in tcp_urg() local
5230 if (tp->urg_data == TCP_URG_NOTYET) { in tcp_urg()
5231 u32 ptr = tp->urg_seq - ntohl(th->seq) + (th->doff * 4) - in tcp_urg()
5239 tp->urg_data = TCP_URG_VALID | tmp; in tcp_urg()
5248 struct tcp_sock *tp = tcp_sk(sk); in tcp_copy_to_iovec() local
5254 err = skb_copy_datagram_msg(skb, hlen, tp->ucopy.msg, chunk); in tcp_copy_to_iovec()
5256 err = skb_copy_and_csum_datagram_msg(skb, hlen, tp->ucopy.msg); in tcp_copy_to_iovec()
5259 tp->ucopy.len -= chunk; in tcp_copy_to_iovec()
5260 tp->copied_seq += chunk; in tcp_copy_to_iovec()
5296 struct tcp_sock *tp = tcp_sk(sk); in tcp_validate_incoming() local
5299 if (tcp_fast_parse_options(skb, th, tp) && tp->rx_opt.saw_tstamp && in tcp_validate_incoming()
5305 &tp->last_oow_ack_time)) in tcp_validate_incoming()
5313 if (!tcp_sequence(tp, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq)) { in tcp_validate_incoming()
5325 &tp->last_oow_ack_time)) in tcp_validate_incoming()
5339 if (TCP_SKB_CB(skb)->seq == tp->rcv_nxt) in tcp_validate_incoming()
5393 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_established() local
5412 tp->rx_opt.saw_tstamp = 0; in tcp_rcv_established()
5423 if ((tcp_flag_word(th) & TCP_HP_BITS) == tp->pred_flags && in tcp_rcv_established()
5424 TCP_SKB_CB(skb)->seq == tp->rcv_nxt && in tcp_rcv_established()
5425 !after(TCP_SKB_CB(skb)->ack_seq, tp->snd_nxt)) { in tcp_rcv_established()
5426 int tcp_header_len = tp->tcp_header_len; in tcp_rcv_established()
5436 if (!tcp_parse_aligned_timestamp(tp, th)) in tcp_rcv_established()
5440 if ((s32)(tp->rx_opt.rcv_tsval - tp->rx_opt.ts_recent) < 0) in tcp_rcv_established()
5459 tp->rcv_nxt == tp->rcv_wup) in tcp_rcv_established()
5460 tcp_store_ts_recent(tp); in tcp_rcv_established()
5477 if (tp->ucopy.task == current && in tcp_rcv_established()
5478 tp->copied_seq == tp->rcv_nxt && in tcp_rcv_established()
5479 len - tcp_header_len <= tp->ucopy.len && in tcp_rcv_established()
5491 tp->rcv_nxt == tp->rcv_wup) in tcp_rcv_established()
5492 tcp_store_ts_recent(tp); in tcp_rcv_established()
5497 tcp_rcv_nxt_update(tp, TCP_SKB_CB(skb)->end_seq); in tcp_rcv_established()
5515 tp->rcv_nxt == tp->rcv_wup) in tcp_rcv_established()
5516 tcp_store_ts_recent(tp); in tcp_rcv_established()
5529 if (TCP_SKB_CB(skb)->ack_seq != tp->snd_una) { in tcp_rcv_established()
5536 tcp_update_wl(tp, TCP_SKB_CB(skb)->seq); in tcp_rcv_established()
5589 struct tcp_sock *tp = tcp_sk(sk); in tcp_finish_connect() local
5610 tp->lsndtime = tcp_time_stamp; in tcp_finish_connect()
5615 inet_csk_reset_keepalive_timer(sk, keepalive_time_when(tp)); in tcp_finish_connect()
5617 if (!tp->rx_opt.snd_wscale) in tcp_finish_connect()
5618 __tcp_fast_path_on(tp, tp->snd_wnd); in tcp_finish_connect()
5620 tp->pred_flags = 0; in tcp_finish_connect()
5627 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_fastopen_synack() local
5628 struct sk_buff *data = tp->syn_data ? tcp_write_queue_head(sk) : NULL; in tcp_rcv_fastopen_synack()
5629 u16 mss = tp->rx_opt.mss_clamp, try_exp = 0; in tcp_rcv_fastopen_synack()
5632 if (mss == tp->rx_opt.user_mss) { in tcp_rcv_fastopen_synack()
5642 if (!tp->syn_fastopen) { in tcp_rcv_fastopen_synack()
5645 } else if (tp->total_retrans) { in tcp_rcv_fastopen_synack()
5652 } else if (cookie->len < 0 && !tp->syn_data) { in tcp_rcv_fastopen_synack()
5657 try_exp = tp->syn_fastopen_exp ? 2 : 1; in tcp_rcv_fastopen_synack()
5672 tp->syn_data_acked = tp->syn_data; in tcp_rcv_fastopen_synack()
5673 if (tp->syn_data_acked) in tcp_rcv_fastopen_synack()
5682 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_synsent_state_process() local
5684 int saved_clamp = tp->rx_opt.mss_clamp; in tcp_rcv_synsent_state_process()
5687 tcp_parse_options(skb, &tp->rx_opt, 0, &foc); in tcp_rcv_synsent_state_process()
5688 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr) in tcp_rcv_synsent_state_process()
5689 tp->rx_opt.rcv_tsecr -= tp->tsoffset; in tcp_rcv_synsent_state_process()
5700 if (!after(TCP_SKB_CB(skb)->ack_seq, tp->snd_una) || in tcp_rcv_synsent_state_process()
5701 after(TCP_SKB_CB(skb)->ack_seq, tp->snd_nxt)) in tcp_rcv_synsent_state_process()
5704 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_rcv_synsent_state_process()
5705 !between(tp->rx_opt.rcv_tsecr, tp->retrans_stamp, in tcp_rcv_synsent_state_process()
5741 tcp_ecn_rcv_synack(tp, th); in tcp_rcv_synsent_state_process()
5743 tcp_init_wl(tp, TCP_SKB_CB(skb)->seq); in tcp_rcv_synsent_state_process()
5749 tp->rcv_nxt = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
5750 tp->rcv_wup = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
5755 tp->snd_wnd = ntohs(th->window); in tcp_rcv_synsent_state_process()
5757 if (!tp->rx_opt.wscale_ok) { in tcp_rcv_synsent_state_process()
5758 tp->rx_opt.snd_wscale = tp->rx_opt.rcv_wscale = 0; in tcp_rcv_synsent_state_process()
5759 tp->window_clamp = min(tp->window_clamp, 65535U); in tcp_rcv_synsent_state_process()
5762 if (tp->rx_opt.saw_tstamp) { in tcp_rcv_synsent_state_process()
5763 tp->rx_opt.tstamp_ok = 1; in tcp_rcv_synsent_state_process()
5764 tp->tcp_header_len = in tcp_rcv_synsent_state_process()
5766 tp->advmss -= TCPOLEN_TSTAMP_ALIGNED; in tcp_rcv_synsent_state_process()
5767 tcp_store_ts_recent(tp); in tcp_rcv_synsent_state_process()
5769 tp->tcp_header_len = sizeof(struct tcphdr); in tcp_rcv_synsent_state_process()
5772 if (tcp_is_sack(tp) && sysctl_tcp_fack) in tcp_rcv_synsent_state_process()
5773 tcp_enable_fack(tp); in tcp_rcv_synsent_state_process()
5782 tp->copied_seq = tp->rcv_nxt; in tcp_rcv_synsent_state_process()
5788 fastopen_fail = (tp->syn_fastopen || tp->syn_data) && in tcp_rcv_synsent_state_process()
5834 if (tp->rx_opt.ts_recent_stamp && tp->rx_opt.saw_tstamp && in tcp_rcv_synsent_state_process()
5835 tcp_paws_reject(&tp->rx_opt, 0)) in tcp_rcv_synsent_state_process()
5845 if (tp->rx_opt.saw_tstamp) { in tcp_rcv_synsent_state_process()
5846 tp->rx_opt.tstamp_ok = 1; in tcp_rcv_synsent_state_process()
5847 tcp_store_ts_recent(tp); in tcp_rcv_synsent_state_process()
5848 tp->tcp_header_len = in tcp_rcv_synsent_state_process()
5851 tp->tcp_header_len = sizeof(struct tcphdr); in tcp_rcv_synsent_state_process()
5854 tp->rcv_nxt = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
5855 tp->copied_seq = tp->rcv_nxt; in tcp_rcv_synsent_state_process()
5856 tp->rcv_wup = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
5861 tp->snd_wnd = ntohs(th->window); in tcp_rcv_synsent_state_process()
5862 tp->snd_wl1 = TCP_SKB_CB(skb)->seq; in tcp_rcv_synsent_state_process()
5863 tp->max_window = tp->snd_wnd; in tcp_rcv_synsent_state_process()
5865 tcp_ecn_rcv_syn(tp, th); in tcp_rcv_synsent_state_process()
5894 tcp_clear_options(&tp->rx_opt); in tcp_rcv_synsent_state_process()
5895 tp->rx_opt.mss_clamp = saved_clamp; in tcp_rcv_synsent_state_process()
5899 tcp_clear_options(&tp->rx_opt); in tcp_rcv_synsent_state_process()
5900 tp->rx_opt.mss_clamp = saved_clamp; in tcp_rcv_synsent_state_process()
5913 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_state_process() local
5920 tp->rx_opt.saw_tstamp = 0; in tcp_rcv_state_process()
5973 req = tp->fastopen_rsk; in tcp_rcv_state_process()
6001 if (!tp->srtt_us) in tcp_rcv_state_process()
6008 tp->total_retrans = req->num_retrans; in tcp_rcv_state_process()
6016 tp->copied_seq = tp->rcv_nxt; in tcp_rcv_state_process()
6030 tp->snd_una = TCP_SKB_CB(skb)->ack_seq; in tcp_rcv_state_process()
6031 tp->snd_wnd = ntohs(th->window) << tp->rx_opt.snd_wscale; in tcp_rcv_state_process()
6032 tcp_init_wl(tp, TCP_SKB_CB(skb)->seq); in tcp_rcv_state_process()
6034 if (tp->rx_opt.tstamp_ok) in tcp_rcv_state_process()
6035 tp->advmss -= TCPOLEN_TSTAMP_ALIGNED; in tcp_rcv_state_process()
6053 tp->lsndtime = tcp_time_stamp; in tcp_rcv_state_process()
6056 tcp_fast_path_on(tp); in tcp_rcv_state_process()
6073 if (tp->snd_una != tp->write_seq) in tcp_rcv_state_process()
6089 if (tp->linger2 < 0 || in tcp_rcv_state_process()
6091 after(TCP_SKB_CB(skb)->end_seq - th->fin, tp->rcv_nxt))) { in tcp_rcv_state_process()
6116 if (tp->snd_una == tp->write_seq) { in tcp_rcv_state_process()
6123 if (tp->snd_una == tp->write_seq) { in tcp_rcv_state_process()
6139 if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) in tcp_rcv_state_process()
6149 after(TCP_SKB_CB(skb)->end_seq - th->fin, tp->rcv_nxt)) { in tcp_rcv_state_process()
6325 struct tcp_sock *tp = tcp_sk(sk); in tcp_conn_request() local
6356 tmp_opt.user_mss = tp->rx_opt.user_mss; in tcp_conn_request()