Lines Matching refs:tp
248 static void tcp_ecn_queue_cwr(struct tcp_sock *tp) in tcp_ecn_queue_cwr() argument
250 if (tp->ecn_flags & TCP_ECN_OK) in tcp_ecn_queue_cwr()
251 tp->ecn_flags |= TCP_ECN_QUEUE_CWR; in tcp_ecn_queue_cwr()
267 static void tcp_ecn_withdraw_cwr(struct tcp_sock *tp) in tcp_ecn_withdraw_cwr() argument
269 tp->ecn_flags &= ~TCP_ECN_QUEUE_CWR; in tcp_ecn_withdraw_cwr()
274 struct tcp_sock *tp = tcp_sk(sk); in __tcp_ecn_check_ce() local
282 if (tp->ecn_flags & TCP_ECN_SEEN) in __tcp_ecn_check_ce()
289 if (!(tp->ecn_flags & TCP_ECN_DEMAND_CWR)) { in __tcp_ecn_check_ce()
292 tp->ecn_flags |= TCP_ECN_DEMAND_CWR; in __tcp_ecn_check_ce()
294 tp->ecn_flags |= TCP_ECN_SEEN; in __tcp_ecn_check_ce()
299 tp->ecn_flags |= TCP_ECN_SEEN; in __tcp_ecn_check_ce()
310 static void tcp_ecn_rcv_synack(struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_synack() argument
312 if ((tp->ecn_flags & TCP_ECN_OK) && (!th->ece || th->cwr)) in tcp_ecn_rcv_synack()
313 tp->ecn_flags &= ~TCP_ECN_OK; in tcp_ecn_rcv_synack()
316 static void tcp_ecn_rcv_syn(struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_syn() argument
318 if ((tp->ecn_flags & TCP_ECN_OK) && (!th->ece || !th->cwr)) in tcp_ecn_rcv_syn()
319 tp->ecn_flags &= ~TCP_ECN_OK; in tcp_ecn_rcv_syn()
322 static bool tcp_ecn_rcv_ecn_echo(const struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_ecn_echo() argument
324 if (th->ece && !th->syn && (tp->ecn_flags & TCP_ECN_OK)) in tcp_ecn_rcv_ecn_echo()
336 const struct tcp_sock *tp = tcp_sk(sk); in tcp_sndbuf_expand() local
344 per_mss = max_t(u32, tp->rx_opt.mss_clamp, tp->mss_cache) + in tcp_sndbuf_expand()
351 nr_segs = max_t(u32, TCP_INIT_CWND, tp->snd_cwnd); in tcp_sndbuf_expand()
352 nr_segs = max_t(u32, nr_segs, tp->reordering + 1); in tcp_sndbuf_expand()
394 struct tcp_sock *tp = tcp_sk(sk); in __tcp_grow_window() local
399 while (tp->rcv_ssthresh <= window) { in __tcp_grow_window()
411 struct tcp_sock *tp = tcp_sk(sk); in tcp_grow_window() local
414 room = min_t(int, tp->window_clamp, tcp_space(sk)) - tp->rcv_ssthresh; in tcp_grow_window()
424 incr = 2 * tp->advmss; in tcp_grow_window()
430 tp->rcv_ssthresh += min(room, incr); in tcp_grow_window()
442 struct tcp_sock *tp = tcp_sk(sk); in tcp_init_buffer_space() local
448 tp->rcvq_space.space = min_t(u32, tp->rcv_wnd, TCP_INIT_CWND * tp->advmss); in tcp_init_buffer_space()
449 tcp_mstamp_refresh(tp); in tcp_init_buffer_space()
450 tp->rcvq_space.time = tp->tcp_mstamp; in tcp_init_buffer_space()
451 tp->rcvq_space.seq = tp->copied_seq; in tcp_init_buffer_space()
455 if (tp->window_clamp >= maxwin) { in tcp_init_buffer_space()
456 tp->window_clamp = maxwin; in tcp_init_buffer_space()
458 if (tcp_app_win && maxwin > 4 * tp->advmss) in tcp_init_buffer_space()
459 tp->window_clamp = max(maxwin - in tcp_init_buffer_space()
461 4 * tp->advmss); in tcp_init_buffer_space()
466 tp->window_clamp > 2 * tp->advmss && in tcp_init_buffer_space()
467 tp->window_clamp + tp->advmss > maxwin) in tcp_init_buffer_space()
468 tp->window_clamp = max(2 * tp->advmss, maxwin - tp->advmss); in tcp_init_buffer_space()
470 tp->rcv_ssthresh = min(tp->rcv_ssthresh, tp->window_clamp); in tcp_init_buffer_space()
471 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_init_buffer_space()
477 struct tcp_sock *tp = tcp_sk(sk); in tcp_clamp_window() local
492 tp->rcv_ssthresh = min(tp->window_clamp, 2U * tp->advmss); in tcp_clamp_window()
504 const struct tcp_sock *tp = tcp_sk(sk); in tcp_initialize_rcv_mss() local
505 unsigned int hint = min_t(unsigned int, tp->advmss, tp->mss_cache); in tcp_initialize_rcv_mss()
507 hint = min(hint, tp->rcv_wnd / 2); in tcp_initialize_rcv_mss()
526 static void tcp_rcv_rtt_update(struct tcp_sock *tp, u32 sample, int win_dep) in tcp_rcv_rtt_update() argument
528 u32 new_sample = tp->rcv_rtt_est.rtt_us; in tcp_rcv_rtt_update()
555 tp->rcv_rtt_est.rtt_us = new_sample; in tcp_rcv_rtt_update()
558 static inline void tcp_rcv_rtt_measure(struct tcp_sock *tp) in tcp_rcv_rtt_measure() argument
562 if (tp->rcv_rtt_est.time == 0) in tcp_rcv_rtt_measure()
564 if (before(tp->rcv_nxt, tp->rcv_rtt_est.seq)) in tcp_rcv_rtt_measure()
566 delta_us = tcp_stamp_us_delta(tp->tcp_mstamp, tp->rcv_rtt_est.time); in tcp_rcv_rtt_measure()
569 tcp_rcv_rtt_update(tp, delta_us, 1); in tcp_rcv_rtt_measure()
572 tp->rcv_rtt_est.seq = tp->rcv_nxt + tp->rcv_wnd; in tcp_rcv_rtt_measure()
573 tp->rcv_rtt_est.time = tp->tcp_mstamp; in tcp_rcv_rtt_measure()
579 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_rtt_measure_ts() local
581 if (tp->rx_opt.rcv_tsecr == tp->rcv_rtt_last_tsecr) in tcp_rcv_rtt_measure_ts()
583 tp->rcv_rtt_last_tsecr = tp->rx_opt.rcv_tsecr; in tcp_rcv_rtt_measure_ts()
587 u32 delta = tcp_time_stamp(tp) - tp->rx_opt.rcv_tsecr; in tcp_rcv_rtt_measure_ts()
594 tcp_rcv_rtt_update(tp, delta_us, 0); in tcp_rcv_rtt_measure_ts()
605 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_space_adjust() local
611 tcp_mstamp_refresh(tp); in tcp_rcv_space_adjust()
612 time = tcp_stamp_us_delta(tp->tcp_mstamp, tp->rcvq_space.time); in tcp_rcv_space_adjust()
613 if (time < (tp->rcv_rtt_est.rtt_us >> 3) || tp->rcv_rtt_est.rtt_us == 0) in tcp_rcv_space_adjust()
617 copied = tp->copied_seq - tp->rcvq_space.seq; in tcp_rcv_space_adjust()
618 if (copied <= tp->rcvq_space.space) in tcp_rcv_space_adjust()
638 rcvwin = ((u64)copied << 1) + 16 * tp->advmss; in tcp_rcv_space_adjust()
641 grow = rcvwin * (copied - tp->rcvq_space.space); in tcp_rcv_space_adjust()
642 do_div(grow, tp->rcvq_space.space); in tcp_rcv_space_adjust()
645 rcvmem = SKB_TRUESIZE(tp->advmss + MAX_TCP_HEADER); in tcp_rcv_space_adjust()
646 while (tcp_win_from_space(sk, rcvmem) < tp->advmss) in tcp_rcv_space_adjust()
649 do_div(rcvwin, tp->advmss); in tcp_rcv_space_adjust()
656 tp->window_clamp = tcp_win_from_space(sk, rcvbuf); in tcp_rcv_space_adjust()
659 tp->rcvq_space.space = copied; in tcp_rcv_space_adjust()
662 tp->rcvq_space.seq = tp->copied_seq; in tcp_rcv_space_adjust()
663 tp->rcvq_space.time = tp->tcp_mstamp; in tcp_rcv_space_adjust()
678 struct tcp_sock *tp = tcp_sk(sk); in tcp_event_data_recv() local
686 tcp_rcv_rtt_measure(tp); in tcp_event_data_recv()
733 struct tcp_sock *tp = tcp_sk(sk); in tcp_rtt_estimator() local
735 u32 srtt = tp->srtt_us; in tcp_rtt_estimator()
758 m -= (tp->mdev_us >> 2); /* similar update on mdev */ in tcp_rtt_estimator()
770 m -= (tp->mdev_us >> 2); /* similar update on mdev */ in tcp_rtt_estimator()
772 tp->mdev_us += m; /* mdev = 3/4 mdev + 1/4 new */ in tcp_rtt_estimator()
773 if (tp->mdev_us > tp->mdev_max_us) { in tcp_rtt_estimator()
774 tp->mdev_max_us = tp->mdev_us; in tcp_rtt_estimator()
775 if (tp->mdev_max_us > tp->rttvar_us) in tcp_rtt_estimator()
776 tp->rttvar_us = tp->mdev_max_us; in tcp_rtt_estimator()
778 if (after(tp->snd_una, tp->rtt_seq)) { in tcp_rtt_estimator()
779 if (tp->mdev_max_us < tp->rttvar_us) in tcp_rtt_estimator()
780 tp->rttvar_us -= (tp->rttvar_us - tp->mdev_max_us) >> 2; in tcp_rtt_estimator()
781 tp->rtt_seq = tp->snd_nxt; in tcp_rtt_estimator()
782 tp->mdev_max_us = tcp_rto_min_us(sk); in tcp_rtt_estimator()
789 tp->mdev_us = m << 1; /* make sure rto = 3*rtt */ in tcp_rtt_estimator()
790 tp->rttvar_us = max(tp->mdev_us, tcp_rto_min_us(sk)); in tcp_rtt_estimator()
791 tp->mdev_max_us = tp->rttvar_us; in tcp_rtt_estimator()
792 tp->rtt_seq = tp->snd_nxt; in tcp_rtt_estimator()
796 tp->srtt_us = max(1U, srtt); in tcp_rtt_estimator()
801 const struct tcp_sock *tp = tcp_sk(sk); in tcp_update_pacing_rate() local
805 rate = (u64)tp->mss_cache * ((USEC_PER_SEC / 100) << 3); in tcp_update_pacing_rate()
815 if (tp->snd_cwnd < tp->snd_ssthresh / 2) in tcp_update_pacing_rate()
820 rate *= max(tp->snd_cwnd, tp->packets_out); in tcp_update_pacing_rate()
822 if (likely(tp->srtt_us)) in tcp_update_pacing_rate()
823 do_div(rate, tp->srtt_us); in tcp_update_pacing_rate()
838 const struct tcp_sock *tp = tcp_sk(sk); in tcp_set_rto() local
849 inet_csk(sk)->icsk_rto = __tcp_set_rto(tp); in tcp_set_rto()
863 __u32 tcp_init_cwnd(const struct tcp_sock *tp, const struct dst_entry *dst) in tcp_init_cwnd() argument
869 return min_t(__u32, cwnd, tp->snd_cwnd_clamp); in tcp_init_cwnd()
873 static void tcp_dsack_seen(struct tcp_sock *tp) in tcp_dsack_seen() argument
875 tp->rx_opt.sack_ok |= TCP_DSACK_SEEN; in tcp_dsack_seen()
876 tp->rack.dsack_seen = 1; in tcp_dsack_seen()
877 tp->dsack_dups++; in tcp_dsack_seen()
887 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_sack_reordering() local
888 const u32 mss = tp->mss_cache; in tcp_check_sack_reordering()
891 fack = tcp_highest_sack_seq(tp); in tcp_check_sack_reordering()
896 if ((metric > tp->reordering * mss) && mss) { in tcp_check_sack_reordering()
899 tp->rx_opt.sack_ok, inet_csk(sk)->icsk_ca_state, in tcp_check_sack_reordering()
900 tp->reordering, in tcp_check_sack_reordering()
902 tp->sacked_out, in tcp_check_sack_reordering()
903 tp->undo_marker ? tp->undo_retrans : 0); in tcp_check_sack_reordering()
905 tp->reordering = min_t(u32, (metric + mss - 1) / mss, in tcp_check_sack_reordering()
910 tp->reord_seen++; in tcp_check_sack_reordering()
916 static void tcp_verify_retransmit_hint(struct tcp_sock *tp, struct sk_buff *skb) in tcp_verify_retransmit_hint() argument
918 if (!tp->retransmit_skb_hint || in tcp_verify_retransmit_hint()
920 TCP_SKB_CB(tp->retransmit_skb_hint)->seq)) in tcp_verify_retransmit_hint()
921 tp->retransmit_skb_hint = skb; in tcp_verify_retransmit_hint()
931 static void tcp_sum_lost(struct tcp_sock *tp, struct sk_buff *skb) in tcp_sum_lost() argument
937 tp->lost += tcp_skb_pcount(skb); in tcp_sum_lost()
940 static void tcp_skb_mark_lost(struct tcp_sock *tp, struct sk_buff *skb) in tcp_skb_mark_lost() argument
943 tcp_verify_retransmit_hint(tp, skb); in tcp_skb_mark_lost()
945 tp->lost_out += tcp_skb_pcount(skb); in tcp_skb_mark_lost()
946 tcp_sum_lost(tp, skb); in tcp_skb_mark_lost()
951 void tcp_skb_mark_lost_uncond_verify(struct tcp_sock *tp, struct sk_buff *skb) in tcp_skb_mark_lost_uncond_verify() argument
953 tcp_verify_retransmit_hint(tp, skb); in tcp_skb_mark_lost_uncond_verify()
955 tcp_sum_lost(tp, skb); in tcp_skb_mark_lost_uncond_verify()
957 tp->lost_out += tcp_skb_pcount(skb); in tcp_skb_mark_lost_uncond_verify()
1055 static bool tcp_is_sackblock_valid(struct tcp_sock *tp, bool is_dsack, in tcp_is_sackblock_valid() argument
1059 if (after(end_seq, tp->snd_nxt) || !before(start_seq, end_seq)) in tcp_is_sackblock_valid()
1063 if (!before(start_seq, tp->snd_nxt)) in tcp_is_sackblock_valid()
1069 if (after(start_seq, tp->snd_una)) in tcp_is_sackblock_valid()
1072 if (!is_dsack || !tp->undo_marker) in tcp_is_sackblock_valid()
1076 if (after(end_seq, tp->snd_una)) in tcp_is_sackblock_valid()
1079 if (!before(start_seq, tp->undo_marker)) in tcp_is_sackblock_valid()
1083 if (!after(end_seq, tp->undo_marker)) in tcp_is_sackblock_valid()
1089 return !before(start_seq, end_seq - tp->max_window); in tcp_is_sackblock_valid()
1096 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_dsack() local
1103 tcp_dsack_seen(tp); in tcp_check_dsack()
1112 tcp_dsack_seen(tp); in tcp_check_dsack()
1119 if (dup_sack && tp->undo_marker && tp->undo_retrans > 0 && in tcp_check_dsack()
1121 after(end_seq_0, tp->undo_marker)) in tcp_check_dsack()
1122 tp->undo_retrans--; in tcp_check_dsack()
1203 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_one() local
1207 if (tp->undo_marker && tp->undo_retrans > 0 && in tcp_sacktag_one()
1208 after(end_seq, tp->undo_marker)) in tcp_sacktag_one()
1209 tp->undo_retrans--; in tcp_sacktag_one()
1216 if (!after(end_seq, tp->snd_una)) in tcp_sacktag_one()
1220 tcp_rack_advance(tp, sacked, end_seq, xmit_time); in tcp_sacktag_one()
1229 tp->lost_out -= pcount; in tcp_sacktag_one()
1230 tp->retrans_out -= pcount; in tcp_sacktag_one()
1238 tcp_highest_sack_seq(tp)) && in tcp_sacktag_one()
1242 if (!after(end_seq, tp->high_seq)) in tcp_sacktag_one()
1251 tp->lost_out -= pcount; in tcp_sacktag_one()
1257 tp->sacked_out += pcount; in tcp_sacktag_one()
1258 tp->delivered += pcount; /* Out-of-order packets delivered */ in tcp_sacktag_one()
1261 if (tp->lost_skb_hint && in tcp_sacktag_one()
1262 before(start_seq, TCP_SKB_CB(tp->lost_skb_hint)->seq)) in tcp_sacktag_one()
1263 tp->lost_cnt_hint += pcount; in tcp_sacktag_one()
1272 tp->retrans_out -= pcount; in tcp_sacktag_one()
1287 struct tcp_sock *tp = tcp_sk(sk); in tcp_shifted_skb() local
1304 if (skb == tp->lost_skb_hint) in tcp_shifted_skb()
1305 tp->lost_cnt_hint += pcount; in tcp_shifted_skb()
1337 if (skb == tp->retransmit_skb_hint) in tcp_shifted_skb()
1338 tp->retransmit_skb_hint = prev; in tcp_shifted_skb()
1339 if (skb == tp->lost_skb_hint) { in tcp_shifted_skb()
1340 tp->lost_skb_hint = prev; in tcp_shifted_skb()
1341 tp->lost_cnt_hint -= tcp_skb_pcount(prev); in tcp_shifted_skb()
1400 struct tcp_sock *tp = tcp_sk(sk); in tcp_shift_skb_data() local
1414 if (!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una)) in tcp_shift_skb_data()
1494 if (!after(TCP_SKB_CB(skb)->seq + len, tp->snd_una)) in tcp_shift_skb_data()
1537 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_walk() local
1596 tcp_highest_sack_seq(tp))) in tcp_sacktag_walk()
1652 static int tcp_sack_cache_ok(const struct tcp_sock *tp, const struct tcp_sack_block *cache) in tcp_sack_cache_ok() argument
1654 return cache < tp->recv_sack_cache + ARRAY_SIZE(tp->recv_sack_cache); in tcp_sack_cache_ok()
1661 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_write_queue() local
1675 state->reord = tp->snd_nxt; in tcp_sacktag_write_queue()
1677 if (!tp->sacked_out) in tcp_sacktag_write_queue()
1684 tp->delivered++; /* A spurious retransmission is delivered */ in tcp_sacktag_write_queue()
1691 if (before(TCP_SKB_CB(ack_skb)->ack_seq, prior_snd_una - tp->max_window)) in tcp_sacktag_write_queue()
1694 if (!tp->packets_out) in tcp_sacktag_write_queue()
1705 if (!tcp_is_sackblock_valid(tp, dup_sack, in tcp_sacktag_write_queue()
1711 if (!tp->undo_marker) in tcp_sacktag_write_queue()
1717 if ((TCP_SKB_CB(ack_skb)->ack_seq != tp->snd_una) && in tcp_sacktag_write_queue()
1718 !after(sp[used_sacks].end_seq, tp->snd_una)) in tcp_sacktag_write_queue()
1753 if (!tp->sacked_out) { in tcp_sacktag_write_queue()
1755 cache = tp->recv_sack_cache + ARRAY_SIZE(tp->recv_sack_cache); in tcp_sacktag_write_queue()
1757 cache = tp->recv_sack_cache; in tcp_sacktag_write_queue()
1759 while (tcp_sack_cache_ok(tp, cache) && !cache->start_seq && in tcp_sacktag_write_queue()
1774 while (tcp_sack_cache_ok(tp, cache) && in tcp_sacktag_write_queue()
1779 if (tcp_sack_cache_ok(tp, cache) && !dup_sack && in tcp_sacktag_write_queue()
1801 if (tcp_highest_sack_seq(tp) == cache->end_seq) { in tcp_sacktag_write_queue()
1816 if (!before(start_seq, tcp_highest_sack_seq(tp))) { in tcp_sacktag_write_queue()
1832 for (i = 0; i < ARRAY_SIZE(tp->recv_sack_cache) - used_sacks; i++) { in tcp_sacktag_write_queue()
1833 tp->recv_sack_cache[i].start_seq = 0; in tcp_sacktag_write_queue()
1834 tp->recv_sack_cache[i].end_seq = 0; in tcp_sacktag_write_queue()
1837 tp->recv_sack_cache[i++] = sp[j]; in tcp_sacktag_write_queue()
1839 if (inet_csk(sk)->icsk_ca_state != TCP_CA_Loss || tp->undo_marker) in tcp_sacktag_write_queue()
1842 tcp_verify_left_out(tp); in tcp_sacktag_write_queue()
1846 WARN_ON((int)tp->sacked_out < 0); in tcp_sacktag_write_queue()
1847 WARN_ON((int)tp->lost_out < 0); in tcp_sacktag_write_queue()
1848 WARN_ON((int)tp->retrans_out < 0); in tcp_sacktag_write_queue()
1849 WARN_ON((int)tcp_packets_in_flight(tp) < 0); in tcp_sacktag_write_queue()
1857 static bool tcp_limit_reno_sacked(struct tcp_sock *tp) in tcp_limit_reno_sacked() argument
1861 holes = max(tp->lost_out, 1U); in tcp_limit_reno_sacked()
1862 holes = min(holes, tp->packets_out); in tcp_limit_reno_sacked()
1864 if ((tp->sacked_out + holes) > tp->packets_out) { in tcp_limit_reno_sacked()
1865 tp->sacked_out = tp->packets_out - holes; in tcp_limit_reno_sacked()
1877 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_reno_reordering() local
1879 if (!tcp_limit_reno_sacked(tp)) in tcp_check_reno_reordering()
1882 tp->reordering = min_t(u32, tp->packets_out + addend, in tcp_check_reno_reordering()
1884 tp->reord_seen++; in tcp_check_reno_reordering()
1893 struct tcp_sock *tp = tcp_sk(sk); in tcp_add_reno_sack() local
1894 u32 prior_sacked = tp->sacked_out; in tcp_add_reno_sack()
1897 tp->sacked_out += num_dupack; in tcp_add_reno_sack()
1899 delivered = tp->sacked_out - prior_sacked; in tcp_add_reno_sack()
1901 tp->delivered += delivered; in tcp_add_reno_sack()
1902 tcp_verify_left_out(tp); in tcp_add_reno_sack()
1910 struct tcp_sock *tp = tcp_sk(sk); in tcp_remove_reno_sacks() local
1914 tp->delivered += max_t(int, acked - tp->sacked_out, 1); in tcp_remove_reno_sacks()
1915 if (acked - 1 >= tp->sacked_out) in tcp_remove_reno_sacks()
1916 tp->sacked_out = 0; in tcp_remove_reno_sacks()
1918 tp->sacked_out -= acked - 1; in tcp_remove_reno_sacks()
1921 tcp_verify_left_out(tp); in tcp_remove_reno_sacks()
1924 static inline void tcp_reset_reno_sack(struct tcp_sock *tp) in tcp_reset_reno_sack() argument
1926 tp->sacked_out = 0; in tcp_reset_reno_sack()
1929 void tcp_clear_retrans(struct tcp_sock *tp) in tcp_clear_retrans() argument
1931 tp->retrans_out = 0; in tcp_clear_retrans()
1932 tp->lost_out = 0; in tcp_clear_retrans()
1933 tp->undo_marker = 0; in tcp_clear_retrans()
1934 tp->undo_retrans = -1; in tcp_clear_retrans()
1935 tp->sacked_out = 0; in tcp_clear_retrans()
1938 static inline void tcp_init_undo(struct tcp_sock *tp) in tcp_init_undo() argument
1940 tp->undo_marker = tp->snd_una; in tcp_init_undo()
1942 tp->undo_retrans = tp->retrans_out ? : -1; in tcp_init_undo()
1956 struct tcp_sock *tp = tcp_sk(sk); in tcp_timeout_mark_lost() local
1964 tp->sacked_out = 0; in tcp_timeout_mark_lost()
1966 tp->is_sack_reneg = 1; in tcp_timeout_mark_lost()
1967 } else if (tcp_is_reno(tp)) { in tcp_timeout_mark_lost()
1968 tcp_reset_reno_sack(tp); in tcp_timeout_mark_lost()
1976 tcp_rack_skb_timeout(tp, skb, 0) > 0) in tcp_timeout_mark_lost()
1980 tcp_verify_left_out(tp); in tcp_timeout_mark_lost()
1981 tcp_clear_all_retrans_hints(tp); in tcp_timeout_mark_lost()
1988 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_loss() local
1996 !after(tp->high_seq, tp->snd_una) || in tcp_enter_loss()
1998 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_enter_loss()
1999 tp->prior_cwnd = tp->snd_cwnd; in tcp_enter_loss()
2000 tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk); in tcp_enter_loss()
2002 tcp_init_undo(tp); in tcp_enter_loss()
2004 tp->snd_cwnd = tcp_packets_in_flight(tp) + 1; in tcp_enter_loss()
2005 tp->snd_cwnd_cnt = 0; in tcp_enter_loss()
2006 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_enter_loss()
2012 tp->sacked_out >= net->ipv4.sysctl_tcp_reordering) in tcp_enter_loss()
2013 tp->reordering = min_t(unsigned int, tp->reordering, in tcp_enter_loss()
2016 tp->high_seq = tp->snd_nxt; in tcp_enter_loss()
2017 tcp_ecn_queue_cwr(tp); in tcp_enter_loss()
2023 tp->frto = net->ipv4.sysctl_tcp_frto && in tcp_enter_loss()
2041 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_sack_reneging() local
2042 unsigned long delay = max(usecs_to_jiffies(tp->srtt_us >> 4), in tcp_check_sack_reneging()
2063 static inline int tcp_dupack_heuristics(const struct tcp_sock *tp) in tcp_dupack_heuristics() argument
2065 return tp->sacked_out + 1; in tcp_dupack_heuristics()
2167 struct tcp_sock *tp = tcp_sk(sk); in tcp_time_to_recover() local
2170 if (tp->lost_out) in tcp_time_to_recover()
2174 if (!tcp_is_rack(sk) && tcp_dupack_heuristics(tp) > tp->reordering) in tcp_time_to_recover()
2188 struct tcp_sock *tp = tcp_sk(sk); in tcp_mark_head_lost() local
2193 const u32 loss_high = tcp_is_sack(tp) ? tp->snd_nxt : tp->high_seq; in tcp_mark_head_lost()
2195 WARN_ON(packets > tp->packets_out); in tcp_mark_head_lost()
2196 skb = tp->lost_skb_hint; in tcp_mark_head_lost()
2199 if (mark_head && after(TCP_SKB_CB(skb)->seq, tp->snd_una)) in tcp_mark_head_lost()
2201 cnt = tp->lost_cnt_hint; in tcp_mark_head_lost()
2210 tp->lost_skb_hint = skb; in tcp_mark_head_lost()
2211 tp->lost_cnt_hint = cnt; in tcp_mark_head_lost()
2217 if (tcp_is_reno(tp) || in tcp_mark_head_lost()
2222 if (tcp_is_sack(tp) || in tcp_mark_head_lost()
2237 tcp_skb_mark_lost(tp, skb); in tcp_mark_head_lost()
2242 tcp_verify_left_out(tp); in tcp_mark_head_lost()
2249 struct tcp_sock *tp = tcp_sk(sk); in tcp_update_scoreboard() local
2251 if (tcp_is_sack(tp)) { in tcp_update_scoreboard()
2252 int sacked_upto = tp->sacked_out - tp->reordering; in tcp_update_scoreboard()
2260 static bool tcp_tsopt_ecr_before(const struct tcp_sock *tp, u32 when) in tcp_tsopt_ecr_before() argument
2262 return tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_tsopt_ecr_before()
2263 before(tp->rx_opt.rcv_tsecr, when); in tcp_tsopt_ecr_before()
2269 static bool tcp_skb_spurious_retrans(const struct tcp_sock *tp, in tcp_skb_spurious_retrans() argument
2273 tcp_tsopt_ecr_before(tp, tcp_skb_timestamp(skb)); in tcp_skb_spurious_retrans()
2279 static inline bool tcp_packet_delayed(const struct tcp_sock *tp) in tcp_packet_delayed() argument
2281 return tp->retrans_stamp && in tcp_packet_delayed()
2282 tcp_tsopt_ecr_before(tp, tp->retrans_stamp); in tcp_packet_delayed()
2303 const struct tcp_sock *tp = tcp_sk(sk); in tcp_any_retrans_done() local
2306 if (tp->retrans_out) in tcp_any_retrans_done()
2319 struct tcp_sock *tp = tcp_sk(sk); in DBGUNDO() local
2326 tp->snd_cwnd, tcp_left_out(tp), in DBGUNDO()
2327 tp->snd_ssthresh, tp->prior_ssthresh, in DBGUNDO()
2328 tp->packets_out); in DBGUNDO()
2335 tp->snd_cwnd, tcp_left_out(tp), in DBGUNDO()
2336 tp->snd_ssthresh, tp->prior_ssthresh, in DBGUNDO()
2337 tp->packets_out); in DBGUNDO()
2345 struct tcp_sock *tp = tcp_sk(sk); in tcp_undo_cwnd_reduction() local
2353 tp->lost_out = 0; in tcp_undo_cwnd_reduction()
2354 tcp_clear_all_retrans_hints(tp); in tcp_undo_cwnd_reduction()
2357 if (tp->prior_ssthresh) { in tcp_undo_cwnd_reduction()
2360 tp->snd_cwnd = icsk->icsk_ca_ops->undo_cwnd(sk); in tcp_undo_cwnd_reduction()
2362 if (tp->prior_ssthresh > tp->snd_ssthresh) { in tcp_undo_cwnd_reduction()
2363 tp->snd_ssthresh = tp->prior_ssthresh; in tcp_undo_cwnd_reduction()
2364 tcp_ecn_withdraw_cwr(tp); in tcp_undo_cwnd_reduction()
2367 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_undo_cwnd_reduction()
2368 tp->undo_marker = 0; in tcp_undo_cwnd_reduction()
2369 tp->rack.advanced = 1; /* Force RACK to re-exam losses */ in tcp_undo_cwnd_reduction()
2372 static inline bool tcp_may_undo(const struct tcp_sock *tp) in tcp_may_undo() argument
2374 return tp->undo_marker && (!tp->undo_retrans || tcp_packet_delayed(tp)); in tcp_may_undo()
2380 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_recovery() local
2382 if (tcp_may_undo(tp)) { in tcp_try_undo_recovery()
2396 } else if (tp->rack.reo_wnd_persist) { in tcp_try_undo_recovery()
2397 tp->rack.reo_wnd_persist--; in tcp_try_undo_recovery()
2399 if (tp->snd_una == tp->high_seq && tcp_is_reno(tp)) { in tcp_try_undo_recovery()
2404 tp->retrans_stamp = 0; in tcp_try_undo_recovery()
2408 tp->is_sack_reneg = 0; in tcp_try_undo_recovery()
2415 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_dsack() local
2417 if (tp->undo_marker && !tp->undo_retrans) { in tcp_try_undo_dsack()
2418 tp->rack.reo_wnd_persist = min(TCP_RACK_RECOVERY_THRESH, in tcp_try_undo_dsack()
2419 tp->rack.reo_wnd_persist + 1); in tcp_try_undo_dsack()
2431 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_loss() local
2433 if (frto_undo || tcp_may_undo(tp)) { in tcp_try_undo_loss()
2442 if (frto_undo || tcp_is_sack(tp)) { in tcp_try_undo_loss()
2444 tp->is_sack_reneg = 0; in tcp_try_undo_loss()
2462 struct tcp_sock *tp = tcp_sk(sk); in tcp_init_cwnd_reduction() local
2464 tp->high_seq = tp->snd_nxt; in tcp_init_cwnd_reduction()
2465 tp->tlp_high_seq = 0; in tcp_init_cwnd_reduction()
2466 tp->snd_cwnd_cnt = 0; in tcp_init_cwnd_reduction()
2467 tp->prior_cwnd = tp->snd_cwnd; in tcp_init_cwnd_reduction()
2468 tp->prr_delivered = 0; in tcp_init_cwnd_reduction()
2469 tp->prr_out = 0; in tcp_init_cwnd_reduction()
2470 tp->snd_ssthresh = inet_csk(sk)->icsk_ca_ops->ssthresh(sk); in tcp_init_cwnd_reduction()
2471 tcp_ecn_queue_cwr(tp); in tcp_init_cwnd_reduction()
2476 struct tcp_sock *tp = tcp_sk(sk); in tcp_cwnd_reduction() local
2478 int delta = tp->snd_ssthresh - tcp_packets_in_flight(tp); in tcp_cwnd_reduction()
2480 if (newly_acked_sacked <= 0 || WARN_ON_ONCE(!tp->prior_cwnd)) in tcp_cwnd_reduction()
2483 tp->prr_delivered += newly_acked_sacked; in tcp_cwnd_reduction()
2485 u64 dividend = (u64)tp->snd_ssthresh * tp->prr_delivered + in tcp_cwnd_reduction()
2486 tp->prior_cwnd - 1; in tcp_cwnd_reduction()
2487 sndcnt = div_u64(dividend, tp->prior_cwnd) - tp->prr_out; in tcp_cwnd_reduction()
2491 max_t(int, tp->prr_delivered - tp->prr_out, in tcp_cwnd_reduction()
2497 sndcnt = max(sndcnt, (tp->prr_out ? 0 : 1)); in tcp_cwnd_reduction()
2498 tp->snd_cwnd = tcp_packets_in_flight(tp) + sndcnt; in tcp_cwnd_reduction()
2503 struct tcp_sock *tp = tcp_sk(sk); in tcp_end_cwnd_reduction() local
2509 if (tp->snd_ssthresh < TCP_INFINITE_SSTHRESH && in tcp_end_cwnd_reduction()
2510 (inet_csk(sk)->icsk_ca_state == TCP_CA_CWR || tp->undo_marker)) { in tcp_end_cwnd_reduction()
2511 tp->snd_cwnd = tp->snd_ssthresh; in tcp_end_cwnd_reduction()
2512 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_end_cwnd_reduction()
2520 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_cwr() local
2522 tp->prior_ssthresh = 0; in tcp_enter_cwr()
2524 tp->undo_marker = 0; in tcp_enter_cwr()
2533 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_keep_open() local
2536 if (tcp_left_out(tp) || tcp_any_retrans_done(sk)) in tcp_try_keep_open()
2541 tp->high_seq = tp->snd_nxt; in tcp_try_keep_open()
2547 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_to_open() local
2549 tcp_verify_left_out(tp); in tcp_try_to_open()
2552 tp->retrans_stamp = 0; in tcp_try_to_open()
2573 struct tcp_sock *tp = tcp_sk(sk); in tcp_mtup_probe_success() local
2577 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_mtup_probe_success()
2578 tp->snd_cwnd = tp->snd_cwnd * in tcp_mtup_probe_success()
2579 tcp_mss_to_mtu(sk, tp->mss_cache) / in tcp_mtup_probe_success()
2581 tp->snd_cwnd_cnt = 0; in tcp_mtup_probe_success()
2582 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_mtup_probe_success()
2583 tp->snd_ssthresh = tcp_current_ssthresh(sk); in tcp_mtup_probe_success()
2598 struct tcp_sock *tp = tcp_sk(sk); in tcp_simple_retransmit() local
2607 tp->retrans_out -= tcp_skb_pcount(skb); in tcp_simple_retransmit()
2609 tcp_skb_mark_lost_uncond_verify(tp, skb); in tcp_simple_retransmit()
2613 tcp_clear_retrans_hints_partial(tp); in tcp_simple_retransmit()
2615 if (!tp->lost_out) in tcp_simple_retransmit()
2618 if (tcp_is_reno(tp)) in tcp_simple_retransmit()
2619 tcp_limit_reno_sacked(tp); in tcp_simple_retransmit()
2621 tcp_verify_left_out(tp); in tcp_simple_retransmit()
2629 tp->high_seq = tp->snd_nxt; in tcp_simple_retransmit()
2630 tp->snd_ssthresh = tcp_current_ssthresh(sk); in tcp_simple_retransmit()
2631 tp->prior_ssthresh = 0; in tcp_simple_retransmit()
2632 tp->undo_marker = 0; in tcp_simple_retransmit()
2641 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_recovery() local
2644 if (tcp_is_reno(tp)) in tcp_enter_recovery()
2651 tp->prior_ssthresh = 0; in tcp_enter_recovery()
2652 tcp_init_undo(tp); in tcp_enter_recovery()
2656 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_enter_recovery()
2668 struct tcp_sock *tp = tcp_sk(sk); in tcp_process_loss() local
2669 bool recovered = !before(tp->snd_una, tp->high_seq); in tcp_process_loss()
2671 if ((flag & FLAG_SND_UNA_ADVANCED || rcu_access_pointer(tp->fastopen_rsk)) && in tcp_process_loss()
2675 if (tp->frto) { /* F-RTO RFC5682 sec 3.1 (sack enhanced version). */ in tcp_process_loss()
2683 if (after(tp->snd_nxt, tp->high_seq)) { in tcp_process_loss()
2685 tp->frto = 0; /* Step 3.a. loss was real */ in tcp_process_loss()
2687 tp->high_seq = tp->snd_nxt; in tcp_process_loss()
2693 after(tcp_wnd_end(tp), tp->snd_nxt)) { in tcp_process_loss()
2697 tp->frto = 0; in tcp_process_loss()
2706 if (tcp_is_reno(tp)) { in tcp_process_loss()
2710 if (after(tp->snd_nxt, tp->high_seq) && num_dupack) in tcp_process_loss()
2713 tcp_reset_reno_sack(tp); in tcp_process_loss()
2721 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_partial() local
2723 if (tp->undo_marker && tcp_packet_delayed(tp)) { in tcp_try_undo_partial()
2734 if (tp->retrans_out) in tcp_try_undo_partial()
2738 tp->retrans_stamp = 0; in tcp_try_undo_partial()
2751 struct tcp_sock *tp = tcp_sk(sk); in tcp_identify_packet_loss() local
2756 if (unlikely(tcp_is_reno(tp))) { in tcp_identify_packet_loss()
2759 u32 prior_retrans = tp->retrans_out; in tcp_identify_packet_loss()
2762 if (prior_retrans > tp->retrans_out) in tcp_identify_packet_loss()
2769 struct tcp_sock *tp = tcp_sk(sk); in tcp_force_fast_retransmit() local
2771 return after(tcp_highest_sack_seq(tp), in tcp_force_fast_retransmit()
2772 tp->snd_una + tp->reordering * tp->mss_cache); in tcp_force_fast_retransmit()
2791 struct tcp_sock *tp = tcp_sk(sk); in tcp_fastretrans_alert() local
2796 if (!tp->packets_out && tp->sacked_out) in tcp_fastretrans_alert()
2797 tp->sacked_out = 0; in tcp_fastretrans_alert()
2802 tp->prior_ssthresh = 0; in tcp_fastretrans_alert()
2809 tcp_verify_left_out(tp); in tcp_fastretrans_alert()
2814 WARN_ON(tp->retrans_out != 0); in tcp_fastretrans_alert()
2815 tp->retrans_stamp = 0; in tcp_fastretrans_alert()
2816 } else if (!before(tp->snd_una, tp->high_seq)) { in tcp_fastretrans_alert()
2821 if (tp->snd_una != tp->high_seq) { in tcp_fastretrans_alert()
2828 if (tcp_is_reno(tp)) in tcp_fastretrans_alert()
2829 tcp_reset_reno_sack(tp); in tcp_fastretrans_alert()
2841 if (tcp_is_reno(tp)) in tcp_fastretrans_alert()
2847 do_lost = tcp_is_reno(tp) || in tcp_fastretrans_alert()
2865 if (tcp_is_reno(tp)) { in tcp_fastretrans_alert()
2867 tcp_reset_reno_sack(tp); in tcp_fastretrans_alert()
2883 tp->snd_una == tp->mtu_probe.probe_seq_start) { in tcp_fastretrans_alert()
2886 tp->snd_cwnd++; in tcp_fastretrans_alert()
2904 struct tcp_sock *tp = tcp_sk(sk); in tcp_update_rtt_min() local
2906 if ((flag & FLAG_ACK_MAYBE_DELAYED) && rtt_us > tcp_min_rtt(tp)) { in tcp_update_rtt_min()
2913 minmax_running_min(&tp->rtt_min, wlen, tcp_jiffies32, in tcp_update_rtt_min()
2921 const struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_update_rtt() local
2937 if (seq_rtt_us < 0 && tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_ack_update_rtt()
2939 u32 delta = tcp_time_stamp(tp) - tp->rx_opt.rcv_tsecr; in tcp_ack_update_rtt()
2990 struct tcp_sock *tp = tcp_sk(sk); in tcp_rearm_rto() local
2995 if (rcu_access_pointer(tp->fastopen_rsk)) in tcp_rearm_rto()
2998 if (!tp->packets_out) { in tcp_rearm_rto()
3026 struct tcp_sock *tp = tcp_sk(sk); in tcp_tso_acked() local
3029 BUG_ON(!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una)); in tcp_tso_acked()
3032 if (tcp_trim_head(sk, skb, tp->snd_una - TCP_SKB_CB(skb)->seq)) in tcp_tso_acked()
3072 struct tcp_sock *tp = tcp_sk(sk); in tcp_clean_rtx_queue() local
3073 u32 prior_sacked = tp->sacked_out; in tcp_clean_rtx_queue()
3074 u32 reord = tp->snd_nxt; /* lowest acked un-retx un-sacked seq */ in tcp_clean_rtx_queue()
3096 if (after(scb->end_seq, tp->snd_una)) { in tcp_clean_rtx_queue()
3098 !after(tp->snd_una, scb->seq)) in tcp_clean_rtx_queue()
3111 tp->retrans_out -= acked_pcount; in tcp_clean_rtx_queue()
3122 if (!after(scb->end_seq, tp->high_seq)) in tcp_clean_rtx_queue()
3127 tp->sacked_out -= acked_pcount; in tcp_clean_rtx_queue()
3128 } else if (tcp_is_sack(tp)) { in tcp_clean_rtx_queue()
3129 tp->delivered += acked_pcount; in tcp_clean_rtx_queue()
3130 if (!tcp_skb_spurious_retrans(tp, skb)) in tcp_clean_rtx_queue()
3131 tcp_rack_advance(tp, sacked, scb->end_seq, in tcp_clean_rtx_queue()
3135 tp->lost_out -= acked_pcount; in tcp_clean_rtx_queue()
3137 tp->packets_out -= acked_pcount; in tcp_clean_rtx_queue()
3152 tp->retrans_stamp = 0; in tcp_clean_rtx_queue()
3159 if (unlikely(skb == tp->retransmit_skb_hint)) in tcp_clean_rtx_queue()
3160 tp->retransmit_skb_hint = NULL; in tcp_clean_rtx_queue()
3161 if (unlikely(skb == tp->lost_skb_hint)) in tcp_clean_rtx_queue()
3162 tp->lost_skb_hint = NULL; in tcp_clean_rtx_queue()
3169 if (likely(between(tp->snd_up, prior_snd_una, tp->snd_una))) in tcp_clean_rtx_queue()
3170 tp->snd_up = tp->snd_una; in tcp_clean_rtx_queue()
3176 seq_rtt_us = tcp_stamp_us_delta(tp->tcp_mstamp, first_ackt); in tcp_clean_rtx_queue()
3177 ca_rtt_us = tcp_stamp_us_delta(tp->tcp_mstamp, last_ackt); in tcp_clean_rtx_queue()
3179 if (pkts_acked == 1 && last_in_flight < tp->mss_cache && in tcp_clean_rtx_queue()
3181 sack->rate->prior_delivered + 1 == tp->delivered && in tcp_clean_rtx_queue()
3191 sack_rtt_us = tcp_stamp_us_delta(tp->tcp_mstamp, sack->first_sackt); in tcp_clean_rtx_queue()
3192 ca_rtt_us = tcp_stamp_us_delta(tp->tcp_mstamp, sack->last_sackt); in tcp_clean_rtx_queue()
3200 !after(tp->mtu_probe.probe_seq_end, tp->snd_una))) { in tcp_clean_rtx_queue()
3204 if (tcp_is_reno(tp)) { in tcp_clean_rtx_queue()
3222 delta = prior_sacked - tp->sacked_out; in tcp_clean_rtx_queue()
3223 tp->lost_cnt_hint -= min(tp->lost_cnt_hint, delta); in tcp_clean_rtx_queue()
3226 sack_rtt_us > tcp_stamp_us_delta(tp->tcp_mstamp, in tcp_clean_rtx_queue()
3244 WARN_ON((int)tp->sacked_out < 0); in tcp_clean_rtx_queue()
3245 WARN_ON((int)tp->lost_out < 0); in tcp_clean_rtx_queue()
3246 WARN_ON((int)tp->retrans_out < 0); in tcp_clean_rtx_queue()
3247 if (!tp->packets_out && tcp_is_sack(tp)) { in tcp_clean_rtx_queue()
3249 if (tp->lost_out) { in tcp_clean_rtx_queue()
3251 tp->lost_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3252 tp->lost_out = 0; in tcp_clean_rtx_queue()
3254 if (tp->sacked_out) { in tcp_clean_rtx_queue()
3256 tp->sacked_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3257 tp->sacked_out = 0; in tcp_clean_rtx_queue()
3259 if (tp->retrans_out) { in tcp_clean_rtx_queue()
3261 tp->retrans_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3262 tp->retrans_out = 0; in tcp_clean_rtx_queue()
3273 const struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_probe() local
3278 if (!after(TCP_SKB_CB(head)->end_seq, tcp_wnd_end(tp))) { in tcp_ack_probe()
3341 static inline bool tcp_may_update_window(const struct tcp_sock *tp, in tcp_may_update_window() argument
3345 return after(ack, tp->snd_una) || in tcp_may_update_window()
3346 after(ack_seq, tp->snd_wl1) || in tcp_may_update_window()
3347 (ack_seq == tp->snd_wl1 && nwin > tp->snd_wnd); in tcp_may_update_window()
3351 static void tcp_snd_una_update(struct tcp_sock *tp, u32 ack) in tcp_snd_una_update() argument
3353 u32 delta = ack - tp->snd_una; in tcp_snd_una_update()
3355 sock_owned_by_me((struct sock *)tp); in tcp_snd_una_update()
3356 tp->bytes_acked += delta; in tcp_snd_una_update()
3357 tp->snd_una = ack; in tcp_snd_una_update()
3361 static void tcp_rcv_nxt_update(struct tcp_sock *tp, u32 seq) in tcp_rcv_nxt_update() argument
3363 u32 delta = seq - tp->rcv_nxt; in tcp_rcv_nxt_update()
3365 sock_owned_by_me((struct sock *)tp); in tcp_rcv_nxt_update()
3366 tp->bytes_received += delta; in tcp_rcv_nxt_update()
3367 WRITE_ONCE(tp->rcv_nxt, seq); in tcp_rcv_nxt_update()
3378 struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_update_window() local
3383 nwin <<= tp->rx_opt.snd_wscale; in tcp_ack_update_window()
3385 if (tcp_may_update_window(tp, ack, ack_seq, nwin)) { in tcp_ack_update_window()
3387 tcp_update_wl(tp, ack_seq); in tcp_ack_update_window()
3389 if (tp->snd_wnd != nwin) { in tcp_ack_update_window()
3390 tp->snd_wnd = nwin; in tcp_ack_update_window()
3395 tp->pred_flags = 0; in tcp_ack_update_window()
3401 if (nwin > tp->max_window) { in tcp_ack_update_window()
3402 tp->max_window = nwin; in tcp_ack_update_window()
3408 tcp_snd_una_update(tp, ack); in tcp_ack_update_window()
3454 struct tcp_sock *tp = tcp_sk(sk); in tcp_send_challenge_ack() local
3461 &tp->last_oow_ack_time)) in tcp_send_challenge_ack()
3481 static void tcp_store_ts_recent(struct tcp_sock *tp) in tcp_store_ts_recent() argument
3483 tp->rx_opt.ts_recent = tp->rx_opt.rcv_tsval; in tcp_store_ts_recent()
3484 tp->rx_opt.ts_recent_stamp = ktime_get_seconds(); in tcp_store_ts_recent()
3487 static void tcp_replace_ts_recent(struct tcp_sock *tp, u32 seq) in tcp_replace_ts_recent() argument
3489 if (tp->rx_opt.saw_tstamp && !after(seq, tp->rcv_wup)) { in tcp_replace_ts_recent()
3497 if (tcp_paws_check(&tp->rx_opt, 0)) in tcp_replace_ts_recent()
3498 tcp_store_ts_recent(tp); in tcp_replace_ts_recent()
3509 struct tcp_sock *tp = tcp_sk(sk); in tcp_process_tlp_ack() local
3511 if (before(ack, tp->tlp_high_seq)) in tcp_process_tlp_ack()
3516 tp->tlp_high_seq = 0; in tcp_process_tlp_ack()
3517 } else if (after(ack, tp->tlp_high_seq)) { in tcp_process_tlp_ack()
3530 tp->tlp_high_seq = 0; in tcp_process_tlp_ack()
3548 struct tcp_sock *tp = tcp_sk(sk); in tcp_xmit_recovery() local
3556 if (after(tp->snd_nxt, tp->high_seq)) in tcp_xmit_recovery()
3558 tp->frto = 0; in tcp_xmit_recovery()
3567 struct tcp_sock *tp = tcp_sk(sk); in tcp_newly_delivered() local
3570 delivered = tp->delivered - prior_delivered; in tcp_newly_delivered()
3573 tp->delivered_ce += delivered; in tcp_newly_delivered()
3583 struct tcp_sock *tp = tcp_sk(sk); in tcp_ack() local
3586 u32 prior_snd_una = tp->snd_una; in tcp_ack()
3587 bool is_sack_reneg = tp->is_sack_reneg; in tcp_ack()
3591 int prior_packets = tp->packets_out; in tcp_ack()
3592 u32 delivered = tp->delivered; in tcp_ack()
3593 u32 lost = tp->lost; in tcp_ack()
3608 if (before(ack, prior_snd_una - tp->max_window)) { in tcp_ack()
3619 if (after(ack, tp->snd_nxt)) in tcp_ack()
3633 prior_fack = tcp_is_sack(tp) ? tcp_highest_sack_seq(tp) : tp->snd_una; in tcp_ack()
3634 rs.prior_in_flight = tcp_packets_in_flight(tp); in tcp_ack()
3640 tcp_replace_ts_recent(tp, TCP_SKB_CB(skb)->seq); in tcp_ack()
3648 tcp_update_wl(tp, ack_seq); in tcp_ack()
3649 tcp_snd_una_update(tp, ack); in tcp_ack()
3669 if (tcp_ecn_rcv_ecn_echo(tp, tcp_hdr(skb))) { in tcp_ack()
3685 tp->rcv_tstamp = tcp_jiffies32; in tcp_ack()
3694 if (tp->tlp_high_seq) in tcp_ack()
3715 lost = tp->lost - lost; /* freshly marked lost */ in tcp_ack()
3735 if (tp->tlp_high_seq) in tcp_ack()
3952 static bool tcp_parse_aligned_timestamp(struct tcp_sock *tp, const struct tcphdr *th) in tcp_parse_aligned_timestamp() argument
3958 tp->rx_opt.saw_tstamp = 1; in tcp_parse_aligned_timestamp()
3960 tp->rx_opt.rcv_tsval = ntohl(*ptr); in tcp_parse_aligned_timestamp()
3963 tp->rx_opt.rcv_tsecr = ntohl(*ptr) - tp->tsoffset; in tcp_parse_aligned_timestamp()
3965 tp->rx_opt.rcv_tsecr = 0; in tcp_parse_aligned_timestamp()
3976 const struct tcphdr *th, struct tcp_sock *tp) in tcp_fast_parse_options() argument
3982 tp->rx_opt.saw_tstamp = 0; in tcp_fast_parse_options()
3984 } else if (tp->rx_opt.tstamp_ok && in tcp_fast_parse_options()
3986 if (tcp_parse_aligned_timestamp(tp, th)) in tcp_fast_parse_options()
3990 tcp_parse_options(net, skb, &tp->rx_opt, 1, NULL); in tcp_fast_parse_options()
3991 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr) in tcp_fast_parse_options()
3992 tp->rx_opt.rcv_tsecr -= tp->tsoffset; in tcp_fast_parse_options()
4057 const struct tcp_sock *tp = tcp_sk(sk); in tcp_disordered_ack() local
4063 (th->ack && seq == TCP_SKB_CB(skb)->end_seq && seq == tp->rcv_nxt) && in tcp_disordered_ack()
4066 ack == tp->snd_una && in tcp_disordered_ack()
4069 !tcp_may_update_window(tp, ack, seq, ntohs(th->window) << tp->rx_opt.snd_wscale) && in tcp_disordered_ack()
4072 (s32)(tp->rx_opt.ts_recent - tp->rx_opt.rcv_tsval) <= (inet_csk(sk)->icsk_rto * 1024) / HZ); in tcp_disordered_ack()
4078 const struct tcp_sock *tp = tcp_sk(sk); in tcp_paws_discard() local
4080 return !tcp_paws_check(&tp->rx_opt, TCP_PAWS_WINDOW) && in tcp_paws_discard()
4097 static inline bool tcp_sequence(const struct tcp_sock *tp, u32 seq, u32 end_seq) in tcp_sequence() argument
4099 return !before(end_seq, tp->rcv_wup) && in tcp_sequence()
4100 !after(seq, tp->rcv_nxt + tcp_receive_window(tp)); in tcp_sequence()
4147 struct tcp_sock *tp = tcp_sk(sk); in tcp_fin() local
4197 skb_rbtree_purge(&tp->out_of_order_queue); in tcp_fin()
4198 if (tcp_is_sack(tp)) in tcp_fin()
4199 tcp_sack_reset(&tp->rx_opt); in tcp_fin()
4229 struct tcp_sock *tp = tcp_sk(sk); in tcp_dsack_set() local
4231 if (tcp_is_sack(tp) && sock_net(sk)->ipv4.sysctl_tcp_dsack) { in tcp_dsack_set()
4234 if (before(seq, tp->rcv_nxt)) in tcp_dsack_set()
4241 tp->rx_opt.dsack = 1; in tcp_dsack_set()
4242 tp->duplicate_sack[0].start_seq = seq; in tcp_dsack_set()
4243 tp->duplicate_sack[0].end_seq = end_seq; in tcp_dsack_set()
4249 struct tcp_sock *tp = tcp_sk(sk); in tcp_dsack_extend() local
4251 if (!tp->rx_opt.dsack) in tcp_dsack_extend()
4254 tcp_sack_extend(tp->duplicate_sack, seq, end_seq); in tcp_dsack_extend()
4270 struct tcp_sock *tp = tcp_sk(sk); in tcp_send_dupack() local
4273 before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { in tcp_send_dupack()
4277 if (tcp_is_sack(tp) && sock_net(sk)->ipv4.sysctl_tcp_dsack) { in tcp_send_dupack()
4281 if (after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) in tcp_send_dupack()
4282 end_seq = tp->rcv_nxt; in tcp_send_dupack()
4293 static void tcp_sack_maybe_coalesce(struct tcp_sock *tp) in tcp_sack_maybe_coalesce() argument
4296 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_maybe_coalesce()
4302 for (this_sack = 1; this_sack < tp->rx_opt.num_sacks;) { in tcp_sack_maybe_coalesce()
4309 tp->rx_opt.num_sacks--; in tcp_sack_maybe_coalesce()
4310 for (i = this_sack; i < tp->rx_opt.num_sacks; i++) in tcp_sack_maybe_coalesce()
4320 struct tcp_sock *tp = tcp_sk(sk); in tcp_sack_new_ofo_skb() local
4321 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_new_ofo_skb()
4322 int cur_sacks = tp->rx_opt.num_sacks; in tcp_sack_new_ofo_skb()
4334 tcp_sack_maybe_coalesce(tp); in tcp_sack_new_ofo_skb()
4346 if (tp->compressed_ack > TCP_FASTRETRANS_THRESH) in tcp_sack_new_ofo_skb()
4349 tp->rx_opt.num_sacks--; in tcp_sack_new_ofo_skb()
4359 tp->rx_opt.num_sacks++; in tcp_sack_new_ofo_skb()
4364 static void tcp_sack_remove(struct tcp_sock *tp) in tcp_sack_remove() argument
4366 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_remove()
4367 int num_sacks = tp->rx_opt.num_sacks; in tcp_sack_remove()
4371 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in tcp_sack_remove()
4372 tp->rx_opt.num_sacks = 0; in tcp_sack_remove()
4378 if (!before(tp->rcv_nxt, sp->start_seq)) { in tcp_sack_remove()
4382 WARN_ON(before(tp->rcv_nxt, sp->end_seq)); in tcp_sack_remove()
4386 tp->selective_acks[i-1] = tp->selective_acks[i]; in tcp_sack_remove()
4393 tp->rx_opt.num_sacks = num_sacks; in tcp_sack_remove()
4475 struct tcp_sock *tp = tcp_sk(sk); in tcp_ofo_queue() local
4476 __u32 dsack_high = tp->rcv_nxt; in tcp_ofo_queue()
4481 p = rb_first(&tp->out_of_order_queue); in tcp_ofo_queue()
4484 if (after(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) in tcp_ofo_queue()
4494 rb_erase(&skb->rbnode, &tp->out_of_order_queue); in tcp_ofo_queue()
4496 if (unlikely(!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt))) { in tcp_ofo_queue()
4503 tcp_rcv_nxt_update(tp, TCP_SKB_CB(skb)->end_seq); in tcp_ofo_queue()
4542 struct tcp_sock *tp = tcp_sk(sk); in tcp_data_queue_ofo() local
4557 tp->pred_flags = 0; in tcp_data_queue_ofo()
4560 tp->rcv_ooopack += max_t(u16, 1, skb_shinfo(skb)->gso_segs); in tcp_data_queue_ofo()
4565 p = &tp->out_of_order_queue.rb_node; in tcp_data_queue_ofo()
4566 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in tcp_data_queue_ofo()
4568 if (tcp_is_sack(tp)) { in tcp_data_queue_ofo()
4569 tp->rx_opt.num_sacks = 1; in tcp_data_queue_ofo()
4570 tp->selective_acks[0].start_seq = seq; in tcp_data_queue_ofo()
4571 tp->selective_acks[0].end_seq = end_seq; in tcp_data_queue_ofo()
4574 rb_insert_color(&skb->rbnode, &tp->out_of_order_queue); in tcp_data_queue_ofo()
4575 tp->ooo_last_skb = skb; in tcp_data_queue_ofo()
4582 if (tcp_ooo_try_coalesce(sk, tp->ooo_last_skb, in tcp_data_queue_ofo()
4591 if (!before(seq, TCP_SKB_CB(tp->ooo_last_skb)->end_seq)) { in tcp_data_queue_ofo()
4592 parent = &tp->ooo_last_skb->rbnode; in tcp_data_queue_ofo()
4624 &tp->out_of_order_queue); in tcp_data_queue_ofo()
4642 rb_insert_color(&skb->rbnode, &tp->out_of_order_queue); in tcp_data_queue_ofo()
4654 rb_erase(&skb1->rbnode, &tp->out_of_order_queue); in tcp_data_queue_ofo()
4662 tp->ooo_last_skb = skb; in tcp_data_queue_ofo()
4665 if (tcp_is_sack(tp)) in tcp_data_queue_ofo()
4746 const struct tcp_sock *tp = tcp_sk(sk); in tcp_data_ready() local
4747 int avail = tp->rcv_nxt - tp->copied_seq; in tcp_data_ready()
4757 struct tcp_sock *tp = tcp_sk(sk); in tcp_data_queue() local
4770 tp->rx_opt.dsack = 0; in tcp_data_queue()
4776 if (TCP_SKB_CB(skb)->seq == tp->rcv_nxt) { in tcp_data_queue()
4777 if (tcp_receive_window(tp) == 0) { in tcp_data_queue()
4797 if (!RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in tcp_data_queue()
4803 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) in tcp_data_queue()
4807 if (tp->rx_opt.num_sacks) in tcp_data_queue()
4808 tcp_sack_remove(tp); in tcp_data_queue()
4819 if (!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) { in tcp_data_queue()
4834 if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt + tcp_receive_window(tp))) in tcp_data_queue()
4837 if (before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { in tcp_data_queue()
4839 tcp_dsack_set(sk, TCP_SKB_CB(skb)->seq, tp->rcv_nxt); in tcp_data_queue()
4844 if (!tcp_receive_window(tp)) { in tcp_data_queue()
5012 struct tcp_sock *tp = tcp_sk(sk); in tcp_collapse_ofo_queue() local
5017 skb = skb_rb_first(&tp->out_of_order_queue); in tcp_collapse_ofo_queue()
5020 tp->ooo_last_skb = skb_rb_last(&tp->out_of_order_queue); in tcp_collapse_ofo_queue()
5039 tcp_collapse(sk, NULL, &tp->out_of_order_queue, in tcp_collapse_ofo_queue()
5070 struct tcp_sock *tp = tcp_sk(sk); in tcp_prune_ofo_queue() local
5074 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) in tcp_prune_ofo_queue()
5079 node = &tp->ooo_last_skb->rbnode; in tcp_prune_ofo_queue()
5082 rb_erase(node, &tp->out_of_order_queue); in tcp_prune_ofo_queue()
5094 tp->ooo_last_skb = rb_to_skb(prev); in tcp_prune_ofo_queue()
5101 if (tp->rx_opt.sack_ok) in tcp_prune_ofo_queue()
5102 tcp_sack_reset(&tp->rx_opt); in tcp_prune_ofo_queue()
5115 struct tcp_sock *tp = tcp_sk(sk); in tcp_prune_queue() local
5122 tp->rcv_ssthresh = min(tp->rcv_ssthresh, 4U * tp->advmss); in tcp_prune_queue()
5132 tp->copied_seq, tp->rcv_nxt); in tcp_prune_queue()
5153 tp->pred_flags = 0; in tcp_prune_queue()
5159 const struct tcp_sock *tp = tcp_sk(sk); in tcp_should_expand_sndbuf() local
5176 if (tcp_packets_in_flight(tp) >= tp->snd_cwnd) in tcp_should_expand_sndbuf()
5190 struct tcp_sock *tp = tcp_sk(sk); in tcp_new_space() local
5194 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_new_space()
5226 struct tcp_sock *tp = tcp_sk(sk); in __tcp_ack_snd_check() local
5230 if (((tp->rcv_nxt - tp->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss && in __tcp_ack_snd_check()
5236 (tp->rcv_nxt - tp->copied_seq < sk->sk_rcvlowat || in __tcp_ack_snd_check()
5237 __tcp_select_window(sk) >= tp->rcv_wnd)) || in __tcp_ack_snd_check()
5247 if (!ofo_possible || RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in __tcp_ack_snd_check()
5252 if (!tcp_is_sack(tp) || in __tcp_ack_snd_check()
5253 tp->compressed_ack >= sock_net(sk)->ipv4.sysctl_tcp_comp_sack_nr) in __tcp_ack_snd_check()
5256 if (tp->compressed_ack_rcv_nxt != tp->rcv_nxt) { in __tcp_ack_snd_check()
5257 tp->compressed_ack_rcv_nxt = tp->rcv_nxt; in __tcp_ack_snd_check()
5258 if (tp->compressed_ack > TCP_FASTRETRANS_THRESH) in __tcp_ack_snd_check()
5260 tp->compressed_ack - TCP_FASTRETRANS_THRESH); in __tcp_ack_snd_check()
5261 tp->compressed_ack = 0; in __tcp_ack_snd_check()
5264 if (++tp->compressed_ack <= TCP_FASTRETRANS_THRESH) in __tcp_ack_snd_check()
5267 if (hrtimer_is_queued(&tp->compressed_ack_timer)) in __tcp_ack_snd_check()
5272 rtt = tp->rcv_rtt_est.rtt_us; in __tcp_ack_snd_check()
5273 if (tp->srtt_us && tp->srtt_us < rtt) in __tcp_ack_snd_check()
5274 rtt = tp->srtt_us; in __tcp_ack_snd_check()
5279 hrtimer_start(&tp->compressed_ack_timer, ns_to_ktime(delay), in __tcp_ack_snd_check()
5304 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_urg() local
5312 if (after(tp->copied_seq, ptr)) in tcp_check_urg()
5325 if (before(ptr, tp->rcv_nxt)) in tcp_check_urg()
5329 if (tp->urg_data && !after(ptr, tp->urg_seq)) in tcp_check_urg()
5350 if (tp->urg_seq == tp->copied_seq && tp->urg_data && in tcp_check_urg()
5351 !sock_flag(sk, SOCK_URGINLINE) && tp->copied_seq != tp->rcv_nxt) { in tcp_check_urg()
5353 tp->copied_seq++; in tcp_check_urg()
5354 if (skb && !before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq)) { in tcp_check_urg()
5360 tp->urg_data = TCP_URG_NOTYET; in tcp_check_urg()
5361 WRITE_ONCE(tp->urg_seq, ptr); in tcp_check_urg()
5364 tp->pred_flags = 0; in tcp_check_urg()
5370 struct tcp_sock *tp = tcp_sk(sk); in tcp_urg() local
5377 if (tp->urg_data == TCP_URG_NOTYET) { in tcp_urg()
5378 u32 ptr = tp->urg_seq - ntohl(th->seq) + (th->doff * 4) - in tcp_urg()
5386 tp->urg_data = TCP_URG_VALID | tmp; in tcp_urg()
5403 struct tcp_sock *tp = tcp_sk(sk); in tcp_reset_check() local
5405 return unlikely(TCP_SKB_CB(skb)->seq == (tp->rcv_nxt - 1) && in tcp_reset_check()
5416 struct tcp_sock *tp = tcp_sk(sk); in tcp_validate_incoming() local
5420 if (tcp_fast_parse_options(sock_net(sk), skb, th, tp) && in tcp_validate_incoming()
5421 tp->rx_opt.saw_tstamp && in tcp_validate_incoming()
5427 &tp->last_oow_ack_time)) in tcp_validate_incoming()
5435 if (!tcp_sequence(tp, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq)) { in tcp_validate_incoming()
5447 &tp->last_oow_ack_time)) in tcp_validate_incoming()
5466 if (TCP_SKB_CB(skb)->seq == tp->rcv_nxt || in tcp_validate_incoming()
5469 } else if (tcp_is_sack(tp) && tp->rx_opt.num_sacks > 0) { in tcp_validate_incoming()
5470 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_validate_incoming()
5474 for (this_sack = 1; this_sack < tp->rx_opt.num_sacks; in tcp_validate_incoming()
5492 if (tp->syn_fastopen && !tp->data_segs_in && in tcp_validate_incoming()
5547 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_established() local
5553 tcp_mstamp_refresh(tp); in tcp_rcv_established()
5571 tp->rx_opt.saw_tstamp = 0; in tcp_rcv_established()
5582 if ((tcp_flag_word(th) & TCP_HP_BITS) == tp->pred_flags && in tcp_rcv_established()
5583 TCP_SKB_CB(skb)->seq == tp->rcv_nxt && in tcp_rcv_established()
5584 !after(TCP_SKB_CB(skb)->ack_seq, tp->snd_nxt)) { in tcp_rcv_established()
5585 int tcp_header_len = tp->tcp_header_len; in tcp_rcv_established()
5595 if (!tcp_parse_aligned_timestamp(tp, th)) in tcp_rcv_established()
5599 if ((s32)(tp->rx_opt.rcv_tsval - tp->rx_opt.ts_recent) < 0) in tcp_rcv_established()
5618 tp->rcv_nxt == tp->rcv_wup) in tcp_rcv_established()
5619 tcp_store_ts_recent(tp); in tcp_rcv_established()
5631 tp->rcv_rtt_last_tsecr = tp->rx_opt.rcv_tsecr; in tcp_rcv_established()
5653 tp->rcv_nxt == tp->rcv_wup) in tcp_rcv_established()
5654 tcp_store_ts_recent(tp); in tcp_rcv_established()
5666 if (TCP_SKB_CB(skb)->ack_seq != tp->snd_una) { in tcp_rcv_established()
5725 struct tcp_sock *tp = tcp_sk(sk); in tcp_init_transfer() local
5737 if (tp->total_retrans > 1 && tp->undo_marker) in tcp_init_transfer()
5738 tp->snd_cwnd = 1; in tcp_init_transfer()
5740 tp->snd_cwnd = tcp_init_cwnd(tp, __sk_dst_get(sk)); in tcp_init_transfer()
5741 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_init_transfer()
5750 struct tcp_sock *tp = tcp_sk(sk); in tcp_finish_connect() local
5767 tp->lsndtime = tcp_jiffies32; in tcp_finish_connect()
5770 inet_csk_reset_keepalive_timer(sk, keepalive_time_when(tp)); in tcp_finish_connect()
5772 if (!tp->rx_opt.snd_wscale) in tcp_finish_connect()
5773 __tcp_fast_path_on(tp, tp->snd_wnd); in tcp_finish_connect()
5775 tp->pred_flags = 0; in tcp_finish_connect()
5781 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_fastopen_synack() local
5782 struct sk_buff *data = tp->syn_data ? tcp_rtx_queue_head(sk) : NULL; in tcp_rcv_fastopen_synack()
5783 u16 mss = tp->rx_opt.mss_clamp, try_exp = 0; in tcp_rcv_fastopen_synack()
5786 if (mss == tp->rx_opt.user_mss) { in tcp_rcv_fastopen_synack()
5796 if (!tp->syn_fastopen) { in tcp_rcv_fastopen_synack()
5799 } else if (tp->total_retrans) { in tcp_rcv_fastopen_synack()
5806 } else if (cookie->len < 0 && !tp->syn_data) { in tcp_rcv_fastopen_synack()
5811 try_exp = tp->syn_fastopen_exp ? 2 : 1; in tcp_rcv_fastopen_synack()
5826 tp->syn_data_acked = tp->syn_data; in tcp_rcv_fastopen_synack()
5827 if (tp->syn_data_acked) { in tcp_rcv_fastopen_synack()
5830 if (tp->delivered > 1) in tcp_rcv_fastopen_synack()
5831 --tp->delivered; in tcp_rcv_fastopen_synack()
5839 static void smc_check_reset_syn(struct tcp_sock *tp) in smc_check_reset_syn() argument
5843 if (tp->syn_smc && !tp->rx_opt.smc_ok) in smc_check_reset_syn()
5844 tp->syn_smc = 0; in smc_check_reset_syn()
5851 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_spurious_syn() local
5858 syn_stamp = tp->retrans_stamp; in tcp_try_undo_spurious_syn()
5859 if (tp->undo_marker && syn_stamp && tp->rx_opt.saw_tstamp && in tcp_try_undo_spurious_syn()
5860 syn_stamp == tp->rx_opt.rcv_tsecr) in tcp_try_undo_spurious_syn()
5861 tp->undo_marker = 0; in tcp_try_undo_spurious_syn()
5868 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_synsent_state_process() local
5870 int saved_clamp = tp->rx_opt.mss_clamp; in tcp_rcv_synsent_state_process()
5873 tcp_parse_options(sock_net(sk), skb, &tp->rx_opt, 0, &foc); in tcp_rcv_synsent_state_process()
5874 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr) in tcp_rcv_synsent_state_process()
5875 tp->rx_opt.rcv_tsecr -= tp->tsoffset; in tcp_rcv_synsent_state_process()
5886 if (!after(TCP_SKB_CB(skb)->ack_seq, tp->snd_una) || in tcp_rcv_synsent_state_process()
5887 after(TCP_SKB_CB(skb)->ack_seq, tp->snd_nxt)) in tcp_rcv_synsent_state_process()
5890 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_rcv_synsent_state_process()
5891 !between(tp->rx_opt.rcv_tsecr, tp->retrans_stamp, in tcp_rcv_synsent_state_process()
5892 tcp_time_stamp(tp))) { in tcp_rcv_synsent_state_process()
5928 tcp_ecn_rcv_synack(tp, th); in tcp_rcv_synsent_state_process()
5930 tcp_init_wl(tp, TCP_SKB_CB(skb)->seq); in tcp_rcv_synsent_state_process()
5937 WRITE_ONCE(tp->rcv_nxt, TCP_SKB_CB(skb)->seq + 1); in tcp_rcv_synsent_state_process()
5938 tp->rcv_wup = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
5943 tp->snd_wnd = ntohs(th->window); in tcp_rcv_synsent_state_process()
5945 if (!tp->rx_opt.wscale_ok) { in tcp_rcv_synsent_state_process()
5946 tp->rx_opt.snd_wscale = tp->rx_opt.rcv_wscale = 0; in tcp_rcv_synsent_state_process()
5947 tp->window_clamp = min(tp->window_clamp, 65535U); in tcp_rcv_synsent_state_process()
5950 if (tp->rx_opt.saw_tstamp) { in tcp_rcv_synsent_state_process()
5951 tp->rx_opt.tstamp_ok = 1; in tcp_rcv_synsent_state_process()
5952 tp->tcp_header_len = in tcp_rcv_synsent_state_process()
5954 tp->advmss -= TCPOLEN_TSTAMP_ALIGNED; in tcp_rcv_synsent_state_process()
5955 tcp_store_ts_recent(tp); in tcp_rcv_synsent_state_process()
5957 tp->tcp_header_len = sizeof(struct tcphdr); in tcp_rcv_synsent_state_process()
5966 WRITE_ONCE(tp->copied_seq, tp->rcv_nxt); in tcp_rcv_synsent_state_process()
5968 smc_check_reset_syn(tp); in tcp_rcv_synsent_state_process()
5974 fastopen_fail = (tp->syn_fastopen || tp->syn_data) && in tcp_rcv_synsent_state_process()
6020 if (tp->rx_opt.ts_recent_stamp && tp->rx_opt.saw_tstamp && in tcp_rcv_synsent_state_process()
6021 tcp_paws_reject(&tp->rx_opt, 0)) in tcp_rcv_synsent_state_process()
6031 if (tp->rx_opt.saw_tstamp) { in tcp_rcv_synsent_state_process()
6032 tp->rx_opt.tstamp_ok = 1; in tcp_rcv_synsent_state_process()
6033 tcp_store_ts_recent(tp); in tcp_rcv_synsent_state_process()
6034 tp->tcp_header_len = in tcp_rcv_synsent_state_process()
6037 tp->tcp_header_len = sizeof(struct tcphdr); in tcp_rcv_synsent_state_process()
6040 WRITE_ONCE(tp->rcv_nxt, TCP_SKB_CB(skb)->seq + 1); in tcp_rcv_synsent_state_process()
6041 WRITE_ONCE(tp->copied_seq, tp->rcv_nxt); in tcp_rcv_synsent_state_process()
6042 tp->rcv_wup = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
6047 tp->snd_wnd = ntohs(th->window); in tcp_rcv_synsent_state_process()
6048 tp->snd_wl1 = TCP_SKB_CB(skb)->seq; in tcp_rcv_synsent_state_process()
6049 tp->max_window = tp->snd_wnd; in tcp_rcv_synsent_state_process()
6051 tcp_ecn_rcv_syn(tp, th); in tcp_rcv_synsent_state_process()
6080 tcp_clear_options(&tp->rx_opt); in tcp_rcv_synsent_state_process()
6081 tp->rx_opt.mss_clamp = saved_clamp; in tcp_rcv_synsent_state_process()
6085 tcp_clear_options(&tp->rx_opt); in tcp_rcv_synsent_state_process()
6086 tp->rx_opt.mss_clamp = saved_clamp; in tcp_rcv_synsent_state_process()
6127 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_state_process() local
6165 tp->rx_opt.saw_tstamp = 0; in tcp_rcv_state_process()
6166 tcp_mstamp_refresh(tp); in tcp_rcv_state_process()
6178 tcp_mstamp_refresh(tp); in tcp_rcv_state_process()
6179 tp->rx_opt.saw_tstamp = 0; in tcp_rcv_state_process()
6180 req = rcu_dereference_protected(tp->fastopen_rsk, in tcp_rcv_state_process()
6211 tp->delivered++; /* SYN-ACK delivery isn't tracked in tcp_ack */ in tcp_rcv_state_process()
6212 if (!tp->srtt_us) in tcp_rcv_state_process()
6219 tp->retrans_stamp = 0; in tcp_rcv_state_process()
6221 WRITE_ONCE(tp->copied_seq, tp->rcv_nxt); in tcp_rcv_state_process()
6234 tp->snd_una = TCP_SKB_CB(skb)->ack_seq; in tcp_rcv_state_process()
6235 tp->snd_wnd = ntohs(th->window) << tp->rx_opt.snd_wscale; in tcp_rcv_state_process()
6236 tcp_init_wl(tp, TCP_SKB_CB(skb)->seq); in tcp_rcv_state_process()
6238 if (tp->rx_opt.tstamp_ok) in tcp_rcv_state_process()
6239 tp->advmss -= TCPOLEN_TSTAMP_ALIGNED; in tcp_rcv_state_process()
6245 tp->lsndtime = tcp_jiffies32; in tcp_rcv_state_process()
6248 tcp_fast_path_on(tp); in tcp_rcv_state_process()
6257 if (tp->snd_una != tp->write_seq) in tcp_rcv_state_process()
6271 if (tp->linger2 < 0) { in tcp_rcv_state_process()
6277 after(TCP_SKB_CB(skb)->end_seq - th->fin, tp->rcv_nxt)) { in tcp_rcv_state_process()
6279 if (tp->syn_fastopen && th->fin) in tcp_rcv_state_process()
6305 if (tp->snd_una == tp->write_seq) { in tcp_rcv_state_process()
6312 if (tp->snd_una == tp->write_seq) { in tcp_rcv_state_process()
6328 if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) in tcp_rcv_state_process()
6339 after(TCP_SKB_CB(skb)->end_seq - th->fin, tp->rcv_nxt)) { in tcp_rcv_state_process()
6525 struct tcp_sock *tp = tcp_sk(sk); in tcp_get_syncookie_mss() local
6540 mss = tcp_parse_mss_option(th, tp->rx_opt.user_mss); in tcp_get_syncookie_mss()
6555 struct tcp_sock *tp = tcp_sk(sk); in tcp_conn_request() local
6588 tmp_opt.user_mss = tp->rx_opt.user_mss; in tcp_conn_request()