Lines Matching refs:tp
340 static void tcp_ecn_queue_cwr(struct tcp_sock *tp) in tcp_ecn_queue_cwr() argument
342 if (tp->ecn_flags & TCP_ECN_OK) in tcp_ecn_queue_cwr()
343 tp->ecn_flags |= TCP_ECN_QUEUE_CWR; in tcp_ecn_queue_cwr()
360 static void tcp_ecn_withdraw_cwr(struct tcp_sock *tp) in tcp_ecn_withdraw_cwr() argument
362 tp->ecn_flags &= ~TCP_ECN_QUEUE_CWR; in tcp_ecn_withdraw_cwr()
367 struct tcp_sock *tp = tcp_sk(sk); in __tcp_ecn_check_ce() local
375 if (tp->ecn_flags & TCP_ECN_SEEN) in __tcp_ecn_check_ce()
382 if (!(tp->ecn_flags & TCP_ECN_DEMAND_CWR)) { in __tcp_ecn_check_ce()
385 tp->ecn_flags |= TCP_ECN_DEMAND_CWR; in __tcp_ecn_check_ce()
387 tp->ecn_flags |= TCP_ECN_SEEN; in __tcp_ecn_check_ce()
392 tp->ecn_flags |= TCP_ECN_SEEN; in __tcp_ecn_check_ce()
403 static void tcp_ecn_rcv_synack(struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_synack() argument
405 if ((tp->ecn_flags & TCP_ECN_OK) && (!th->ece || th->cwr)) in tcp_ecn_rcv_synack()
406 tp->ecn_flags &= ~TCP_ECN_OK; in tcp_ecn_rcv_synack()
409 static void tcp_ecn_rcv_syn(struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_syn() argument
411 if ((tp->ecn_flags & TCP_ECN_OK) && (!th->ece || !th->cwr)) in tcp_ecn_rcv_syn()
412 tp->ecn_flags &= ~TCP_ECN_OK; in tcp_ecn_rcv_syn()
415 static bool tcp_ecn_rcv_ecn_echo(const struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_ecn_echo() argument
417 if (th->ece && !th->syn && (tp->ecn_flags & TCP_ECN_OK)) in tcp_ecn_rcv_ecn_echo()
429 const struct tcp_sock *tp = tcp_sk(sk); in tcp_sndbuf_expand() local
437 per_mss = max_t(u32, tp->rx_opt.mss_clamp, tp->mss_cache) + in tcp_sndbuf_expand()
444 nr_segs = max_t(u32, TCP_INIT_CWND, tcp_snd_cwnd(tp)); in tcp_sndbuf_expand()
445 nr_segs = max_t(u32, nr_segs, tp->reordering + 1); in tcp_sndbuf_expand()
488 const struct tcp_sock *tp = tcp_sk(sk); in __tcp_grow_window() local
493 while (tp->rcv_ssthresh <= window) { in __tcp_grow_window()
525 struct tcp_sock *tp = tcp_sk(sk); in tcp_grow_window() local
528 room = min_t(int, tp->window_clamp, tcp_space(sk)) - tp->rcv_ssthresh; in tcp_grow_window()
542 incr = 2 * tp->advmss; in tcp_grow_window()
548 tp->rcv_ssthresh += min(room, incr); in tcp_grow_window()
565 struct tcp_sock *tp = tcp_sk(sk); in tcp_init_buffer_space() local
571 tcp_mstamp_refresh(tp); in tcp_init_buffer_space()
572 tp->rcvq_space.time = tp->tcp_mstamp; in tcp_init_buffer_space()
573 tp->rcvq_space.seq = tp->copied_seq; in tcp_init_buffer_space()
577 if (tp->window_clamp >= maxwin) { in tcp_init_buffer_space()
578 WRITE_ONCE(tp->window_clamp, maxwin); in tcp_init_buffer_space()
580 if (tcp_app_win && maxwin > 4 * tp->advmss) in tcp_init_buffer_space()
581 WRITE_ONCE(tp->window_clamp, in tcp_init_buffer_space()
583 4 * tp->advmss)); in tcp_init_buffer_space()
588 tp->window_clamp > 2 * tp->advmss && in tcp_init_buffer_space()
589 tp->window_clamp + tp->advmss > maxwin) in tcp_init_buffer_space()
590 WRITE_ONCE(tp->window_clamp, in tcp_init_buffer_space()
591 max(2 * tp->advmss, maxwin - tp->advmss)); in tcp_init_buffer_space()
593 tp->rcv_ssthresh = min(tp->rcv_ssthresh, tp->window_clamp); in tcp_init_buffer_space()
594 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_init_buffer_space()
595 tp->rcvq_space.space = min3(tp->rcv_ssthresh, tp->rcv_wnd, in tcp_init_buffer_space()
596 (u32)TCP_INIT_CWND * tp->advmss); in tcp_init_buffer_space()
602 struct tcp_sock *tp = tcp_sk(sk); in tcp_clamp_window() local
618 tp->rcv_ssthresh = min(tp->window_clamp, 2U * tp->advmss); in tcp_clamp_window()
630 const struct tcp_sock *tp = tcp_sk(sk); in tcp_initialize_rcv_mss() local
631 unsigned int hint = min_t(unsigned int, tp->advmss, tp->mss_cache); in tcp_initialize_rcv_mss()
633 hint = min(hint, tp->rcv_wnd / 2); in tcp_initialize_rcv_mss()
652 static void tcp_rcv_rtt_update(struct tcp_sock *tp, u32 sample, int win_dep) in tcp_rcv_rtt_update() argument
654 u32 new_sample = tp->rcv_rtt_est.rtt_us; in tcp_rcv_rtt_update()
681 tp->rcv_rtt_est.rtt_us = new_sample; in tcp_rcv_rtt_update()
684 static inline void tcp_rcv_rtt_measure(struct tcp_sock *tp) in tcp_rcv_rtt_measure() argument
688 if (tp->rcv_rtt_est.time == 0) in tcp_rcv_rtt_measure()
690 if (before(tp->rcv_nxt, tp->rcv_rtt_est.seq)) in tcp_rcv_rtt_measure()
692 delta_us = tcp_stamp_us_delta(tp->tcp_mstamp, tp->rcv_rtt_est.time); in tcp_rcv_rtt_measure()
695 tcp_rcv_rtt_update(tp, delta_us, 1); in tcp_rcv_rtt_measure()
698 tp->rcv_rtt_est.seq = tp->rcv_nxt + tp->rcv_wnd; in tcp_rcv_rtt_measure()
699 tp->rcv_rtt_est.time = tp->tcp_mstamp; in tcp_rcv_rtt_measure()
705 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_rtt_measure_ts() local
707 if (tp->rx_opt.rcv_tsecr == tp->rcv_rtt_last_tsecr) in tcp_rcv_rtt_measure_ts()
709 tp->rcv_rtt_last_tsecr = tp->rx_opt.rcv_tsecr; in tcp_rcv_rtt_measure_ts()
713 u32 delta = tcp_time_stamp(tp) - tp->rx_opt.rcv_tsecr; in tcp_rcv_rtt_measure_ts()
720 tcp_rcv_rtt_update(tp, delta_us, 0); in tcp_rcv_rtt_measure_ts()
731 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_space_adjust() local
737 tcp_mstamp_refresh(tp); in tcp_rcv_space_adjust()
738 time = tcp_stamp_us_delta(tp->tcp_mstamp, tp->rcvq_space.time); in tcp_rcv_space_adjust()
739 if (time < (tp->rcv_rtt_est.rtt_us >> 3) || tp->rcv_rtt_est.rtt_us == 0) in tcp_rcv_space_adjust()
743 copied = tp->copied_seq - tp->rcvq_space.seq; in tcp_rcv_space_adjust()
744 if (copied <= tp->rcvq_space.space) in tcp_rcv_space_adjust()
764 rcvwin = ((u64)copied << 1) + 16 * tp->advmss; in tcp_rcv_space_adjust()
767 grow = rcvwin * (copied - tp->rcvq_space.space); in tcp_rcv_space_adjust()
768 do_div(grow, tp->rcvq_space.space); in tcp_rcv_space_adjust()
777 WRITE_ONCE(tp->window_clamp, in tcp_rcv_space_adjust()
781 tp->rcvq_space.space = copied; in tcp_rcv_space_adjust()
784 tp->rcvq_space.seq = tp->copied_seq; in tcp_rcv_space_adjust()
785 tp->rcvq_space.time = tp->tcp_mstamp; in tcp_rcv_space_adjust()
800 struct tcp_sock *tp = tcp_sk(sk); in tcp_event_data_recv() local
808 tcp_rcv_rtt_measure(tp); in tcp_event_data_recv()
854 struct tcp_sock *tp = tcp_sk(sk); in tcp_rtt_estimator() local
856 u32 srtt = tp->srtt_us; in tcp_rtt_estimator()
879 m -= (tp->mdev_us >> 2); /* similar update on mdev */ in tcp_rtt_estimator()
891 m -= (tp->mdev_us >> 2); /* similar update on mdev */ in tcp_rtt_estimator()
893 tp->mdev_us += m; /* mdev = 3/4 mdev + 1/4 new */ in tcp_rtt_estimator()
894 if (tp->mdev_us > tp->mdev_max_us) { in tcp_rtt_estimator()
895 tp->mdev_max_us = tp->mdev_us; in tcp_rtt_estimator()
896 if (tp->mdev_max_us > tp->rttvar_us) in tcp_rtt_estimator()
897 tp->rttvar_us = tp->mdev_max_us; in tcp_rtt_estimator()
899 if (after(tp->snd_una, tp->rtt_seq)) { in tcp_rtt_estimator()
900 if (tp->mdev_max_us < tp->rttvar_us) in tcp_rtt_estimator()
901 tp->rttvar_us -= (tp->rttvar_us - tp->mdev_max_us) >> 2; in tcp_rtt_estimator()
902 tp->rtt_seq = tp->snd_nxt; in tcp_rtt_estimator()
903 tp->mdev_max_us = tcp_rto_min_us(sk); in tcp_rtt_estimator()
910 tp->mdev_us = m << 1; /* make sure rto = 3*rtt */ in tcp_rtt_estimator()
911 tp->rttvar_us = max(tp->mdev_us, tcp_rto_min_us(sk)); in tcp_rtt_estimator()
912 tp->mdev_max_us = tp->rttvar_us; in tcp_rtt_estimator()
913 tp->rtt_seq = tp->snd_nxt; in tcp_rtt_estimator()
917 tp->srtt_us = max(1U, srtt); in tcp_rtt_estimator()
922 const struct tcp_sock *tp = tcp_sk(sk); in tcp_update_pacing_rate() local
926 rate = (u64)tp->mss_cache * ((USEC_PER_SEC / 100) << 3); in tcp_update_pacing_rate()
936 if (tcp_snd_cwnd(tp) < tp->snd_ssthresh / 2) in tcp_update_pacing_rate()
941 rate *= max(tcp_snd_cwnd(tp), tp->packets_out); in tcp_update_pacing_rate()
943 if (likely(tp->srtt_us)) in tcp_update_pacing_rate()
944 do_div(rate, tp->srtt_us); in tcp_update_pacing_rate()
959 const struct tcp_sock *tp = tcp_sk(sk); in tcp_set_rto() local
970 inet_csk(sk)->icsk_rto = __tcp_set_rto(tp); in tcp_set_rto()
984 __u32 tcp_init_cwnd(const struct tcp_sock *tp, const struct dst_entry *dst) in tcp_init_cwnd() argument
990 return min_t(__u32, cwnd, tp->snd_cwnd_clamp); in tcp_init_cwnd()
1013 static u32 tcp_dsack_seen(struct tcp_sock *tp, u32 start_seq, in tcp_dsack_seen() argument
1023 if (seq_len > tp->max_window) in tcp_dsack_seen()
1025 if (seq_len > tp->mss_cache) in tcp_dsack_seen()
1026 dup_segs = DIV_ROUND_UP(seq_len, tp->mss_cache); in tcp_dsack_seen()
1027 else if (tp->tlp_high_seq && tp->tlp_high_seq == end_seq) in tcp_dsack_seen()
1030 tp->dsack_dups += dup_segs; in tcp_dsack_seen()
1032 if (tp->dsack_dups > tp->total_retrans) in tcp_dsack_seen()
1035 tp->rx_opt.sack_ok |= TCP_DSACK_SEEN; in tcp_dsack_seen()
1042 if (tp->reord_seen && !(state->flag & FLAG_DSACK_TLP)) in tcp_dsack_seen()
1043 tp->rack.dsack_seen = 1; in tcp_dsack_seen()
1059 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_sack_reordering() local
1060 const u32 mss = tp->mss_cache; in tcp_check_sack_reordering()
1063 fack = tcp_highest_sack_seq(tp); in tcp_check_sack_reordering()
1068 if ((metric > tp->reordering * mss) && mss) { in tcp_check_sack_reordering()
1071 tp->rx_opt.sack_ok, inet_csk(sk)->icsk_ca_state, in tcp_check_sack_reordering()
1072 tp->reordering, in tcp_check_sack_reordering()
1074 tp->sacked_out, in tcp_check_sack_reordering()
1075 tp->undo_marker ? tp->undo_retrans : 0); in tcp_check_sack_reordering()
1077 tp->reordering = min_t(u32, (metric + mss - 1) / mss, in tcp_check_sack_reordering()
1082 tp->reord_seen++; in tcp_check_sack_reordering()
1092 static void tcp_verify_retransmit_hint(struct tcp_sock *tp, struct sk_buff *skb) in tcp_verify_retransmit_hint() argument
1094 if ((!tp->retransmit_skb_hint && tp->retrans_out >= tp->lost_out) || in tcp_verify_retransmit_hint()
1095 (tp->retransmit_skb_hint && in tcp_verify_retransmit_hint()
1097 TCP_SKB_CB(tp->retransmit_skb_hint)->seq))) in tcp_verify_retransmit_hint()
1098 tp->retransmit_skb_hint = skb; in tcp_verify_retransmit_hint()
1104 static void tcp_notify_skb_loss_event(struct tcp_sock *tp, const struct sk_buff *skb) in tcp_notify_skb_loss_event() argument
1106 tp->lost += tcp_skb_pcount(skb); in tcp_notify_skb_loss_event()
1112 struct tcp_sock *tp = tcp_sk(sk); in tcp_mark_skb_lost() local
1117 tcp_verify_retransmit_hint(tp, skb); in tcp_mark_skb_lost()
1122 tp->retrans_out -= tcp_skb_pcount(skb); in tcp_mark_skb_lost()
1125 tcp_notify_skb_loss_event(tp, skb); in tcp_mark_skb_lost()
1128 tp->lost_out += tcp_skb_pcount(skb); in tcp_mark_skb_lost()
1130 tcp_notify_skb_loss_event(tp, skb); in tcp_mark_skb_lost()
1135 static void tcp_count_delivered(struct tcp_sock *tp, u32 delivered, in tcp_count_delivered() argument
1138 tp->delivered += delivered; in tcp_count_delivered()
1140 tp->delivered_ce += delivered; in tcp_count_delivered()
1236 static bool tcp_is_sackblock_valid(struct tcp_sock *tp, bool is_dsack, in tcp_is_sackblock_valid() argument
1240 if (after(end_seq, tp->snd_nxt) || !before(start_seq, end_seq)) in tcp_is_sackblock_valid()
1244 if (!before(start_seq, tp->snd_nxt)) in tcp_is_sackblock_valid()
1250 if (after(start_seq, tp->snd_una)) in tcp_is_sackblock_valid()
1253 if (!is_dsack || !tp->undo_marker) in tcp_is_sackblock_valid()
1257 if (after(end_seq, tp->snd_una)) in tcp_is_sackblock_valid()
1260 if (!before(start_seq, tp->undo_marker)) in tcp_is_sackblock_valid()
1264 if (!after(end_seq, tp->undo_marker)) in tcp_is_sackblock_valid()
1270 return !before(start_seq, end_seq - tp->max_window); in tcp_is_sackblock_valid()
1277 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_dsack() local
1295 dup_segs = tcp_dsack_seen(tp, start_seq_0, end_seq_0, state); in tcp_check_dsack()
1304 if (tp->undo_marker && tp->undo_retrans > 0 && in tcp_check_dsack()
1306 after(end_seq_0, tp->undo_marker)) in tcp_check_dsack()
1307 tp->undo_retrans = max_t(int, 0, tp->undo_retrans - dup_segs); in tcp_check_dsack()
1375 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_one() local
1379 if (tp->undo_marker && tp->undo_retrans > 0 && in tcp_sacktag_one()
1380 after(end_seq, tp->undo_marker)) in tcp_sacktag_one()
1381 tp->undo_retrans = max_t(int, 0, tp->undo_retrans - pcount); in tcp_sacktag_one()
1388 if (!after(end_seq, tp->snd_una)) in tcp_sacktag_one()
1392 tcp_rack_advance(tp, sacked, end_seq, xmit_time); in tcp_sacktag_one()
1401 tp->lost_out -= pcount; in tcp_sacktag_one()
1402 tp->retrans_out -= pcount; in tcp_sacktag_one()
1410 tcp_highest_sack_seq(tp)) && in tcp_sacktag_one()
1414 if (!after(end_seq, tp->high_seq)) in tcp_sacktag_one()
1423 tp->lost_out -= pcount; in tcp_sacktag_one()
1429 tp->sacked_out += pcount; in tcp_sacktag_one()
1434 if (tp->lost_skb_hint && in tcp_sacktag_one()
1435 before(start_seq, TCP_SKB_CB(tp->lost_skb_hint)->seq)) in tcp_sacktag_one()
1436 tp->lost_cnt_hint += pcount; in tcp_sacktag_one()
1445 tp->retrans_out -= pcount; in tcp_sacktag_one()
1460 struct tcp_sock *tp = tcp_sk(sk); in tcp_shifted_skb() local
1477 if (skb == tp->lost_skb_hint) in tcp_shifted_skb()
1478 tp->lost_cnt_hint += pcount; in tcp_shifted_skb()
1510 if (skb == tp->retransmit_skb_hint) in tcp_shifted_skb()
1511 tp->retransmit_skb_hint = prev; in tcp_shifted_skb()
1512 if (skb == tp->lost_skb_hint) { in tcp_shifted_skb()
1513 tp->lost_skb_hint = prev; in tcp_shifted_skb()
1514 tp->lost_cnt_hint -= tcp_skb_pcount(prev); in tcp_shifted_skb()
1573 struct tcp_sock *tp = tcp_sk(sk); in tcp_shift_skb_data() local
1587 if (!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una)) in tcp_shift_skb_data()
1667 if (!after(TCP_SKB_CB(skb)->seq + len, tp->snd_una)) in tcp_shift_skb_data()
1712 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_walk() local
1771 tcp_highest_sack_seq(tp))) in tcp_sacktag_walk()
1827 static int tcp_sack_cache_ok(const struct tcp_sock *tp, const struct tcp_sack_block *cache) in tcp_sack_cache_ok() argument
1829 return cache < tp->recv_sack_cache + ARRAY_SIZE(tp->recv_sack_cache); in tcp_sack_cache_ok()
1836 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_write_queue() local
1850 state->reord = tp->snd_nxt; in tcp_sacktag_write_queue()
1852 if (!tp->sacked_out) in tcp_sacktag_write_queue()
1862 if (before(TCP_SKB_CB(ack_skb)->ack_seq, prior_snd_una - tp->max_window)) in tcp_sacktag_write_queue()
1865 if (!tp->packets_out) in tcp_sacktag_write_queue()
1876 if (!tcp_is_sackblock_valid(tp, dup_sack, in tcp_sacktag_write_queue()
1882 if (!tp->undo_marker) in tcp_sacktag_write_queue()
1888 if ((TCP_SKB_CB(ack_skb)->ack_seq != tp->snd_una) && in tcp_sacktag_write_queue()
1889 !after(sp[used_sacks].end_seq, tp->snd_una)) in tcp_sacktag_write_queue()
1927 if (!tp->sacked_out) { in tcp_sacktag_write_queue()
1929 cache = tp->recv_sack_cache + ARRAY_SIZE(tp->recv_sack_cache); in tcp_sacktag_write_queue()
1931 cache = tp->recv_sack_cache; in tcp_sacktag_write_queue()
1933 while (tcp_sack_cache_ok(tp, cache) && !cache->start_seq && in tcp_sacktag_write_queue()
1948 while (tcp_sack_cache_ok(tp, cache) && in tcp_sacktag_write_queue()
1953 if (tcp_sack_cache_ok(tp, cache) && !dup_sack && in tcp_sacktag_write_queue()
1975 if (tcp_highest_sack_seq(tp) == cache->end_seq) { in tcp_sacktag_write_queue()
1990 if (!before(start_seq, tcp_highest_sack_seq(tp))) { in tcp_sacktag_write_queue()
2006 for (i = 0; i < ARRAY_SIZE(tp->recv_sack_cache) - used_sacks; i++) { in tcp_sacktag_write_queue()
2007 tp->recv_sack_cache[i].start_seq = 0; in tcp_sacktag_write_queue()
2008 tp->recv_sack_cache[i].end_seq = 0; in tcp_sacktag_write_queue()
2011 tp->recv_sack_cache[i++] = sp[j]; in tcp_sacktag_write_queue()
2013 if (inet_csk(sk)->icsk_ca_state != TCP_CA_Loss || tp->undo_marker) in tcp_sacktag_write_queue()
2016 tcp_verify_left_out(tp); in tcp_sacktag_write_queue()
2020 WARN_ON((int)tp->sacked_out < 0); in tcp_sacktag_write_queue()
2021 WARN_ON((int)tp->lost_out < 0); in tcp_sacktag_write_queue()
2022 WARN_ON((int)tp->retrans_out < 0); in tcp_sacktag_write_queue()
2023 WARN_ON((int)tcp_packets_in_flight(tp) < 0); in tcp_sacktag_write_queue()
2031 static bool tcp_limit_reno_sacked(struct tcp_sock *tp) in tcp_limit_reno_sacked() argument
2035 holes = max(tp->lost_out, 1U); in tcp_limit_reno_sacked()
2036 holes = min(holes, tp->packets_out); in tcp_limit_reno_sacked()
2038 if ((tp->sacked_out + holes) > tp->packets_out) { in tcp_limit_reno_sacked()
2039 tp->sacked_out = tp->packets_out - holes; in tcp_limit_reno_sacked()
2051 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_reno_reordering() local
2053 if (!tcp_limit_reno_sacked(tp)) in tcp_check_reno_reordering()
2056 tp->reordering = min_t(u32, tp->packets_out + addend, in tcp_check_reno_reordering()
2058 tp->reord_seen++; in tcp_check_reno_reordering()
2067 struct tcp_sock *tp = tcp_sk(sk); in tcp_add_reno_sack() local
2068 u32 prior_sacked = tp->sacked_out; in tcp_add_reno_sack()
2071 tp->sacked_out += num_dupack; in tcp_add_reno_sack()
2073 delivered = tp->sacked_out - prior_sacked; in tcp_add_reno_sack()
2075 tcp_count_delivered(tp, delivered, ece_ack); in tcp_add_reno_sack()
2076 tcp_verify_left_out(tp); in tcp_add_reno_sack()
2084 struct tcp_sock *tp = tcp_sk(sk); in tcp_remove_reno_sacks() local
2088 tcp_count_delivered(tp, max_t(int, acked - tp->sacked_out, 1), in tcp_remove_reno_sacks()
2090 if (acked - 1 >= tp->sacked_out) in tcp_remove_reno_sacks()
2091 tp->sacked_out = 0; in tcp_remove_reno_sacks()
2093 tp->sacked_out -= acked - 1; in tcp_remove_reno_sacks()
2096 tcp_verify_left_out(tp); in tcp_remove_reno_sacks()
2099 static inline void tcp_reset_reno_sack(struct tcp_sock *tp) in tcp_reset_reno_sack() argument
2101 tp->sacked_out = 0; in tcp_reset_reno_sack()
2104 void tcp_clear_retrans(struct tcp_sock *tp) in tcp_clear_retrans() argument
2106 tp->retrans_out = 0; in tcp_clear_retrans()
2107 tp->lost_out = 0; in tcp_clear_retrans()
2108 tp->undo_marker = 0; in tcp_clear_retrans()
2109 tp->undo_retrans = -1; in tcp_clear_retrans()
2110 tp->sacked_out = 0; in tcp_clear_retrans()
2111 tp->rto_stamp = 0; in tcp_clear_retrans()
2112 tp->total_rto = 0; in tcp_clear_retrans()
2113 tp->total_rto_recoveries = 0; in tcp_clear_retrans()
2114 tp->total_rto_time = 0; in tcp_clear_retrans()
2117 static inline void tcp_init_undo(struct tcp_sock *tp) in tcp_init_undo() argument
2119 tp->undo_marker = tp->snd_una; in tcp_init_undo()
2123 tp->undo_retrans = tp->retrans_out; in tcp_init_undo()
2125 if (tp->tlp_high_seq && tp->tlp_retrans) in tcp_init_undo()
2126 tp->undo_retrans++; in tcp_init_undo()
2128 if (!tp->undo_retrans) in tcp_init_undo()
2129 tp->undo_retrans = -1; in tcp_init_undo()
2144 struct tcp_sock *tp = tcp_sk(sk); in tcp_timeout_mark_lost() local
2152 tp->sacked_out = 0; in tcp_timeout_mark_lost()
2154 tp->is_sack_reneg = 1; in tcp_timeout_mark_lost()
2155 } else if (tcp_is_reno(tp)) { in tcp_timeout_mark_lost()
2156 tcp_reset_reno_sack(tp); in tcp_timeout_mark_lost()
2164 tcp_rack_skb_timeout(tp, skb, 0) > 0) in tcp_timeout_mark_lost()
2168 tcp_verify_left_out(tp); in tcp_timeout_mark_lost()
2169 tcp_clear_all_retrans_hints(tp); in tcp_timeout_mark_lost()
2176 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_loss() local
2185 !after(tp->high_seq, tp->snd_una) || in tcp_enter_loss()
2187 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_enter_loss()
2188 tp->prior_cwnd = tcp_snd_cwnd(tp); in tcp_enter_loss()
2189 tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk); in tcp_enter_loss()
2191 tcp_init_undo(tp); in tcp_enter_loss()
2193 tcp_snd_cwnd_set(tp, tcp_packets_in_flight(tp) + 1); in tcp_enter_loss()
2194 tp->snd_cwnd_cnt = 0; in tcp_enter_loss()
2195 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_enter_loss()
2202 tp->sacked_out >= reordering) in tcp_enter_loss()
2203 tp->reordering = min_t(unsigned int, tp->reordering, in tcp_enter_loss()
2207 tp->high_seq = tp->snd_nxt; in tcp_enter_loss()
2208 tp->tlp_high_seq = 0; in tcp_enter_loss()
2209 tcp_ecn_queue_cwr(tp); in tcp_enter_loss()
2215 tp->frto = READ_ONCE(net->ipv4.sysctl_tcp_frto) && in tcp_enter_loss()
2234 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_sack_reneging() local
2235 unsigned long delay = max(usecs_to_jiffies(tp->srtt_us >> 4), in tcp_check_sack_reneging()
2257 static inline int tcp_dupack_heuristics(const struct tcp_sock *tp) in tcp_dupack_heuristics() argument
2259 return tp->sacked_out + 1; in tcp_dupack_heuristics()
2361 struct tcp_sock *tp = tcp_sk(sk); in tcp_time_to_recover() local
2364 if (tp->lost_out) in tcp_time_to_recover()
2368 if (!tcp_is_rack(sk) && tcp_dupack_heuristics(tp) > tp->reordering) in tcp_time_to_recover()
2381 struct tcp_sock *tp = tcp_sk(sk); in tcp_mark_head_lost() local
2385 const u32 loss_high = tp->snd_nxt; in tcp_mark_head_lost()
2387 WARN_ON(packets > tp->packets_out); in tcp_mark_head_lost()
2388 skb = tp->lost_skb_hint; in tcp_mark_head_lost()
2391 if (mark_head && after(TCP_SKB_CB(skb)->seq, tp->snd_una)) in tcp_mark_head_lost()
2393 cnt = tp->lost_cnt_hint; in tcp_mark_head_lost()
2402 tp->lost_skb_hint = skb; in tcp_mark_head_lost()
2403 tp->lost_cnt_hint = cnt; in tcp_mark_head_lost()
2420 tcp_verify_left_out(tp); in tcp_mark_head_lost()
2427 struct tcp_sock *tp = tcp_sk(sk); in tcp_update_scoreboard() local
2429 if (tcp_is_sack(tp)) { in tcp_update_scoreboard()
2430 int sacked_upto = tp->sacked_out - tp->reordering; in tcp_update_scoreboard()
2438 static bool tcp_tsopt_ecr_before(const struct tcp_sock *tp, u32 when) in tcp_tsopt_ecr_before() argument
2440 return tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_tsopt_ecr_before()
2441 before(tp->rx_opt.rcv_tsecr, when); in tcp_tsopt_ecr_before()
2447 static bool tcp_skb_spurious_retrans(const struct tcp_sock *tp, in tcp_skb_spurious_retrans() argument
2451 tcp_tsopt_ecr_before(tp, tcp_skb_timestamp(skb)); in tcp_skb_spurious_retrans()
2457 static inline bool tcp_packet_delayed(const struct tcp_sock *tp) in tcp_packet_delayed() argument
2459 const struct sock *sk = (const struct sock *)tp; in tcp_packet_delayed()
2461 if (tp->retrans_stamp && in tcp_packet_delayed()
2462 tcp_tsopt_ecr_before(tp, tp->retrans_stamp)) in tcp_packet_delayed()
2470 if (!tp->retrans_stamp && /* no record of a retransmit/SYN? */ in tcp_packet_delayed()
2495 const struct tcp_sock *tp = tcp_sk(sk); in tcp_any_retrans_done() local
2498 if (tp->retrans_out) in tcp_any_retrans_done()
2521 struct tcp_sock *tp = tcp_sk(sk); in DBGUNDO() local
2528 tcp_snd_cwnd(tp), tcp_left_out(tp), in DBGUNDO()
2529 tp->snd_ssthresh, tp->prior_ssthresh, in DBGUNDO()
2530 tp->packets_out); in DBGUNDO()
2537 tcp_snd_cwnd(tp), tcp_left_out(tp), in DBGUNDO()
2538 tp->snd_ssthresh, tp->prior_ssthresh, in DBGUNDO()
2539 tp->packets_out); in DBGUNDO()
2547 struct tcp_sock *tp = tcp_sk(sk); in tcp_undo_cwnd_reduction() local
2555 tp->lost_out = 0; in tcp_undo_cwnd_reduction()
2556 tcp_clear_all_retrans_hints(tp); in tcp_undo_cwnd_reduction()
2559 if (tp->prior_ssthresh) { in tcp_undo_cwnd_reduction()
2562 tcp_snd_cwnd_set(tp, icsk->icsk_ca_ops->undo_cwnd(sk)); in tcp_undo_cwnd_reduction()
2564 if (tp->prior_ssthresh > tp->snd_ssthresh) { in tcp_undo_cwnd_reduction()
2565 tp->snd_ssthresh = tp->prior_ssthresh; in tcp_undo_cwnd_reduction()
2566 tcp_ecn_withdraw_cwr(tp); in tcp_undo_cwnd_reduction()
2569 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_undo_cwnd_reduction()
2570 tp->undo_marker = 0; in tcp_undo_cwnd_reduction()
2571 tp->rack.advanced = 1; /* Force RACK to re-exam losses */ in tcp_undo_cwnd_reduction()
2574 static inline bool tcp_may_undo(const struct tcp_sock *tp) in tcp_may_undo() argument
2576 return tp->undo_marker && (!tp->undo_retrans || tcp_packet_delayed(tp)); in tcp_may_undo()
2581 struct tcp_sock *tp = tcp_sk(sk); in tcp_is_non_sack_preventing_reopen() local
2583 if (tp->snd_una == tp->high_seq && tcp_is_reno(tp)) { in tcp_is_non_sack_preventing_reopen()
2588 tp->retrans_stamp = 0; in tcp_is_non_sack_preventing_reopen()
2597 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_recovery() local
2599 if (tcp_may_undo(tp)) { in tcp_try_undo_recovery()
2613 } else if (tp->rack.reo_wnd_persist) { in tcp_try_undo_recovery()
2614 tp->rack.reo_wnd_persist--; in tcp_try_undo_recovery()
2619 tp->is_sack_reneg = 0; in tcp_try_undo_recovery()
2626 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_dsack() local
2628 if (tp->undo_marker && !tp->undo_retrans) { in tcp_try_undo_dsack()
2629 tp->rack.reo_wnd_persist = min(TCP_RACK_RECOVERY_THRESH, in tcp_try_undo_dsack()
2630 tp->rack.reo_wnd_persist + 1); in tcp_try_undo_dsack()
2642 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_loss() local
2644 if (frto_undo || tcp_may_undo(tp)) { in tcp_try_undo_loss()
2655 if (frto_undo || tcp_is_sack(tp)) { in tcp_try_undo_loss()
2657 tp->is_sack_reneg = 0; in tcp_try_undo_loss()
2675 struct tcp_sock *tp = tcp_sk(sk); in tcp_init_cwnd_reduction() local
2677 tp->high_seq = tp->snd_nxt; in tcp_init_cwnd_reduction()
2678 tp->tlp_high_seq = 0; in tcp_init_cwnd_reduction()
2679 tp->snd_cwnd_cnt = 0; in tcp_init_cwnd_reduction()
2680 tp->prior_cwnd = tcp_snd_cwnd(tp); in tcp_init_cwnd_reduction()
2681 tp->prr_delivered = 0; in tcp_init_cwnd_reduction()
2682 tp->prr_out = 0; in tcp_init_cwnd_reduction()
2683 tp->snd_ssthresh = inet_csk(sk)->icsk_ca_ops->ssthresh(sk); in tcp_init_cwnd_reduction()
2684 tcp_ecn_queue_cwr(tp); in tcp_init_cwnd_reduction()
2689 struct tcp_sock *tp = tcp_sk(sk); in tcp_cwnd_reduction() local
2691 int delta = tp->snd_ssthresh - tcp_packets_in_flight(tp); in tcp_cwnd_reduction()
2693 if (newly_acked_sacked <= 0 || WARN_ON_ONCE(!tp->prior_cwnd)) in tcp_cwnd_reduction()
2696 tp->prr_delivered += newly_acked_sacked; in tcp_cwnd_reduction()
2698 u64 dividend = (u64)tp->snd_ssthresh * tp->prr_delivered + in tcp_cwnd_reduction()
2699 tp->prior_cwnd - 1; in tcp_cwnd_reduction()
2700 sndcnt = div_u64(dividend, tp->prior_cwnd) - tp->prr_out; in tcp_cwnd_reduction()
2702 sndcnt = max_t(int, tp->prr_delivered - tp->prr_out, in tcp_cwnd_reduction()
2709 sndcnt = max(sndcnt, (tp->prr_out ? 0 : 1)); in tcp_cwnd_reduction()
2710 tcp_snd_cwnd_set(tp, tcp_packets_in_flight(tp) + sndcnt); in tcp_cwnd_reduction()
2715 struct tcp_sock *tp = tcp_sk(sk); in tcp_end_cwnd_reduction() local
2721 if (tp->snd_ssthresh < TCP_INFINITE_SSTHRESH && in tcp_end_cwnd_reduction()
2722 (inet_csk(sk)->icsk_ca_state == TCP_CA_CWR || tp->undo_marker)) { in tcp_end_cwnd_reduction()
2723 tcp_snd_cwnd_set(tp, tp->snd_ssthresh); in tcp_end_cwnd_reduction()
2724 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_end_cwnd_reduction()
2732 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_cwr() local
2734 tp->prior_ssthresh = 0; in tcp_enter_cwr()
2736 tp->undo_marker = 0; in tcp_enter_cwr()
2745 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_keep_open() local
2748 if (tcp_left_out(tp) || tcp_any_retrans_done(sk)) in tcp_try_keep_open()
2753 tp->high_seq = tp->snd_nxt; in tcp_try_keep_open()
2759 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_to_open() local
2761 tcp_verify_left_out(tp); in tcp_try_to_open()
2764 tp->retrans_stamp = 0; in tcp_try_to_open()
2785 struct tcp_sock *tp = tcp_sk(sk); in tcp_mtup_probe_success() local
2789 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_mtup_probe_success()
2791 val = (u64)tcp_snd_cwnd(tp) * tcp_mss_to_mtu(sk, tp->mss_cache); in tcp_mtup_probe_success()
2794 tcp_snd_cwnd_set(tp, max_t(u32, 1U, val)); in tcp_mtup_probe_success()
2796 tp->snd_cwnd_cnt = 0; in tcp_mtup_probe_success()
2797 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_mtup_probe_success()
2798 tp->snd_ssthresh = tcp_current_ssthresh(sk); in tcp_mtup_probe_success()
2819 struct tcp_sock *tp = tcp_sk(sk); in tcp_non_congestion_loss_retransmit() local
2822 tp->high_seq = tp->snd_nxt; in tcp_non_congestion_loss_retransmit()
2823 tp->snd_ssthresh = tcp_current_ssthresh(sk); in tcp_non_congestion_loss_retransmit()
2824 tp->prior_ssthresh = 0; in tcp_non_congestion_loss_retransmit()
2825 tp->undo_marker = 0; in tcp_non_congestion_loss_retransmit()
2837 struct tcp_sock *tp = tcp_sk(sk); in tcp_simple_retransmit() local
2851 if (tp->syn_data && sk->sk_state == TCP_SYN_SENT) in tcp_simple_retransmit()
2861 tcp_clear_retrans_hints_partial(tp); in tcp_simple_retransmit()
2863 if (!tp->lost_out) in tcp_simple_retransmit()
2866 if (tcp_is_reno(tp)) in tcp_simple_retransmit()
2867 tcp_limit_reno_sacked(tp); in tcp_simple_retransmit()
2869 tcp_verify_left_out(tp); in tcp_simple_retransmit()
2882 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_recovery() local
2888 if (tcp_is_reno(tp)) in tcp_enter_recovery()
2895 tp->prior_ssthresh = 0; in tcp_enter_recovery()
2896 tcp_init_undo(tp); in tcp_enter_recovery()
2900 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_enter_recovery()
2906 static void tcp_update_rto_time(struct tcp_sock *tp) in tcp_update_rto_time() argument
2908 if (tp->rto_stamp) { in tcp_update_rto_time()
2909 tp->total_rto_time += tcp_time_stamp(tp) - tp->rto_stamp; in tcp_update_rto_time()
2910 tp->rto_stamp = 0; in tcp_update_rto_time()
2920 struct tcp_sock *tp = tcp_sk(sk); in tcp_process_loss() local
2921 bool recovered = !before(tp->snd_una, tp->high_seq); in tcp_process_loss()
2923 if ((flag & FLAG_SND_UNA_ADVANCED || rcu_access_pointer(tp->fastopen_rsk)) && in tcp_process_loss()
2927 if (tp->frto) { /* F-RTO RFC5682 sec 3.1 (sack enhanced version). */ in tcp_process_loss()
2935 if (after(tp->snd_nxt, tp->high_seq)) { in tcp_process_loss()
2937 tp->frto = 0; /* Step 3.a. loss was real */ in tcp_process_loss()
2939 tp->high_seq = tp->snd_nxt; in tcp_process_loss()
2945 after(tcp_wnd_end(tp), tp->snd_nxt)) { in tcp_process_loss()
2949 tp->frto = 0; in tcp_process_loss()
2958 if (tcp_is_reno(tp)) { in tcp_process_loss()
2962 if (after(tp->snd_nxt, tp->high_seq) && num_dupack) in tcp_process_loss()
2965 tcp_reset_reno_sack(tp); in tcp_process_loss()
2972 struct tcp_sock *tp = tcp_sk(sk); in tcp_force_fast_retransmit() local
2974 return after(tcp_highest_sack_seq(tp), in tcp_force_fast_retransmit()
2975 tp->snd_una + tp->reordering * tp->mss_cache); in tcp_force_fast_retransmit()
2982 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_partial() local
2984 if (tp->undo_marker && tcp_packet_delayed(tp)) { in tcp_try_undo_partial()
2995 if (tp->retrans_out) in tcp_try_undo_partial()
2999 tp->retrans_stamp = 0; in tcp_try_undo_partial()
3014 struct tcp_sock *tp = tcp_sk(sk); in tcp_identify_packet_loss() local
3019 if (unlikely(tcp_is_reno(tp))) { in tcp_identify_packet_loss()
3022 u32 prior_retrans = tp->retrans_out; in tcp_identify_packet_loss()
3026 if (prior_retrans > tp->retrans_out) in tcp_identify_packet_loss()
3047 struct tcp_sock *tp = tcp_sk(sk); in tcp_fastretrans_alert() local
3053 if (!tp->packets_out && tp->sacked_out) in tcp_fastretrans_alert()
3054 tp->sacked_out = 0; in tcp_fastretrans_alert()
3059 tp->prior_ssthresh = 0; in tcp_fastretrans_alert()
3066 tcp_verify_left_out(tp); in tcp_fastretrans_alert()
3071 WARN_ON(tp->retrans_out != 0 && !tp->syn_data); in tcp_fastretrans_alert()
3072 tp->retrans_stamp = 0; in tcp_fastretrans_alert()
3073 } else if (!before(tp->snd_una, tp->high_seq)) { in tcp_fastretrans_alert()
3078 if (tp->snd_una != tp->high_seq) { in tcp_fastretrans_alert()
3085 if (tcp_is_reno(tp)) in tcp_fastretrans_alert()
3086 tcp_reset_reno_sack(tp); in tcp_fastretrans_alert()
3098 if (tcp_is_reno(tp)) in tcp_fastretrans_alert()
3119 tcp_update_rto_time(tp); in tcp_fastretrans_alert()
3127 if (tcp_is_reno(tp)) { in tcp_fastretrans_alert()
3129 tcp_reset_reno_sack(tp); in tcp_fastretrans_alert()
3145 tp->snd_una == tp->mtu_probe.probe_seq_start) { in tcp_fastretrans_alert()
3148 tcp_snd_cwnd_set(tp, tcp_snd_cwnd(tp) + 1); in tcp_fastretrans_alert()
3166 struct tcp_sock *tp = tcp_sk(sk); in tcp_update_rtt_min() local
3168 if ((flag & FLAG_ACK_MAYBE_DELAYED) && rtt_us > tcp_min_rtt(tp)) { in tcp_update_rtt_min()
3175 minmax_running_min(&tp->rtt_min, wlen, tcp_jiffies32, in tcp_update_rtt_min()
3183 const struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_update_rtt() local
3199 if (seq_rtt_us < 0 && tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_ack_update_rtt()
3201 u32 delta = tcp_time_stamp(tp) - tp->rx_opt.rcv_tsecr; in tcp_ack_update_rtt()
3254 struct tcp_sock *tp = tcp_sk(sk); in tcp_rearm_rto() local
3259 if (rcu_access_pointer(tp->fastopen_rsk)) in tcp_rearm_rto()
3262 if (!tp->packets_out) { in tcp_rearm_rto()
3290 struct tcp_sock *tp = tcp_sk(sk); in tcp_tso_acked() local
3293 BUG_ON(!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una)); in tcp_tso_acked()
3296 if (tcp_trim_head(sk, skb, tp->snd_una - TCP_SKB_CB(skb)->seq)) in tcp_tso_acked()
3336 struct tcp_sock *tp = tcp_sk(sk); in tcp_clean_rtx_queue() local
3337 u32 prior_sacked = tp->sacked_out; in tcp_clean_rtx_queue()
3338 u32 reord = tp->snd_nxt; /* lowest acked un-retx un-sacked seq */ in tcp_clean_rtx_queue()
3357 if (after(scb->end_seq, tp->snd_una)) { in tcp_clean_rtx_queue()
3359 !after(tp->snd_una, scb->seq)) in tcp_clean_rtx_queue()
3372 tp->retrans_out -= acked_pcount; in tcp_clean_rtx_queue()
3382 if (!after(scb->end_seq, tp->high_seq)) in tcp_clean_rtx_queue()
3387 tp->sacked_out -= acked_pcount; in tcp_clean_rtx_queue()
3388 } else if (tcp_is_sack(tp)) { in tcp_clean_rtx_queue()
3389 tcp_count_delivered(tp, acked_pcount, ece_ack); in tcp_clean_rtx_queue()
3390 if (!tcp_skb_spurious_retrans(tp, skb)) in tcp_clean_rtx_queue()
3391 tcp_rack_advance(tp, sacked, scb->end_seq, in tcp_clean_rtx_queue()
3395 tp->lost_out -= acked_pcount; in tcp_clean_rtx_queue()
3397 tp->packets_out -= acked_pcount; in tcp_clean_rtx_queue()
3412 tp->retrans_stamp = 0; in tcp_clean_rtx_queue()
3421 if (unlikely(skb == tp->retransmit_skb_hint)) in tcp_clean_rtx_queue()
3422 tp->retransmit_skb_hint = NULL; in tcp_clean_rtx_queue()
3423 if (unlikely(skb == tp->lost_skb_hint)) in tcp_clean_rtx_queue()
3424 tp->lost_skb_hint = NULL; in tcp_clean_rtx_queue()
3432 if (likely(between(tp->snd_up, prior_snd_una, tp->snd_una))) in tcp_clean_rtx_queue()
3433 tp->snd_up = tp->snd_una; in tcp_clean_rtx_queue()
3442 seq_rtt_us = tcp_stamp_us_delta(tp->tcp_mstamp, first_ackt); in tcp_clean_rtx_queue()
3443 ca_rtt_us = tcp_stamp_us_delta(tp->tcp_mstamp, last_ackt); in tcp_clean_rtx_queue()
3446 (tp->snd_una - prior_snd_una) < tp->mss_cache && in tcp_clean_rtx_queue()
3447 sack->rate->prior_delivered + 1 == tp->delivered && in tcp_clean_rtx_queue()
3457 sack_rtt_us = tcp_stamp_us_delta(tp->tcp_mstamp, sack->first_sackt); in tcp_clean_rtx_queue()
3458 ca_rtt_us = tcp_stamp_us_delta(tp->tcp_mstamp, sack->last_sackt); in tcp_clean_rtx_queue()
3466 !after(tp->mtu_probe.probe_seq_end, tp->snd_una))) { in tcp_clean_rtx_queue()
3470 if (tcp_is_reno(tp)) { in tcp_clean_rtx_queue()
3488 delta = prior_sacked - tp->sacked_out; in tcp_clean_rtx_queue()
3489 tp->lost_cnt_hint -= min(tp->lost_cnt_hint, delta); in tcp_clean_rtx_queue()
3492 sack_rtt_us > tcp_stamp_us_delta(tp->tcp_mstamp, in tcp_clean_rtx_queue()
3505 sample.in_flight = tp->mss_cache * in tcp_clean_rtx_queue()
3506 (tp->delivered - sack->rate->prior_delivered); in tcp_clean_rtx_queue()
3511 WARN_ON((int)tp->sacked_out < 0); in tcp_clean_rtx_queue()
3512 WARN_ON((int)tp->lost_out < 0); in tcp_clean_rtx_queue()
3513 WARN_ON((int)tp->retrans_out < 0); in tcp_clean_rtx_queue()
3514 if (!tp->packets_out && tcp_is_sack(tp)) { in tcp_clean_rtx_queue()
3516 if (tp->lost_out) { in tcp_clean_rtx_queue()
3518 tp->lost_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3519 tp->lost_out = 0; in tcp_clean_rtx_queue()
3521 if (tp->sacked_out) { in tcp_clean_rtx_queue()
3523 tp->sacked_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3524 tp->sacked_out = 0; in tcp_clean_rtx_queue()
3526 if (tp->retrans_out) { in tcp_clean_rtx_queue()
3528 tp->retrans_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3529 tp->retrans_out = 0; in tcp_clean_rtx_queue()
3540 const struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_probe() local
3545 if (!after(TCP_SKB_CB(head)->end_seq, tcp_wnd_end(tp))) { in tcp_ack_probe()
3610 static inline bool tcp_may_update_window(const struct tcp_sock *tp, in tcp_may_update_window() argument
3614 return after(ack, tp->snd_una) || in tcp_may_update_window()
3615 after(ack_seq, tp->snd_wl1) || in tcp_may_update_window()
3616 (ack_seq == tp->snd_wl1 && (nwin > tp->snd_wnd || !nwin)); in tcp_may_update_window()
3620 static void tcp_snd_una_update(struct tcp_sock *tp, u32 ack) in tcp_snd_una_update() argument
3622 u32 delta = ack - tp->snd_una; in tcp_snd_una_update()
3624 sock_owned_by_me((struct sock *)tp); in tcp_snd_una_update()
3625 tp->bytes_acked += delta; in tcp_snd_una_update()
3626 tp->snd_una = ack; in tcp_snd_una_update()
3630 static void tcp_rcv_nxt_update(struct tcp_sock *tp, u32 seq) in tcp_rcv_nxt_update() argument
3632 u32 delta = seq - tp->rcv_nxt; in tcp_rcv_nxt_update()
3634 sock_owned_by_me((struct sock *)tp); in tcp_rcv_nxt_update()
3635 tp->bytes_received += delta; in tcp_rcv_nxt_update()
3636 WRITE_ONCE(tp->rcv_nxt, seq); in tcp_rcv_nxt_update()
3647 struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_update_window() local
3652 nwin <<= tp->rx_opt.snd_wscale; in tcp_ack_update_window()
3654 if (tcp_may_update_window(tp, ack, ack_seq, nwin)) { in tcp_ack_update_window()
3656 tcp_update_wl(tp, ack_seq); in tcp_ack_update_window()
3658 if (tp->snd_wnd != nwin) { in tcp_ack_update_window()
3659 tp->snd_wnd = nwin; in tcp_ack_update_window()
3664 tp->pred_flags = 0; in tcp_ack_update_window()
3670 if (nwin > tp->max_window) { in tcp_ack_update_window()
3671 tp->max_window = nwin; in tcp_ack_update_window()
3677 tcp_snd_una_update(tp, ack); in tcp_ack_update_window()
3727 struct tcp_sock *tp = tcp_sk(sk); in tcp_send_challenge_ack() local
3734 &tp->last_oow_ack_time)) in tcp_send_challenge_ack()
3759 static void tcp_store_ts_recent(struct tcp_sock *tp) in tcp_store_ts_recent() argument
3761 tp->rx_opt.ts_recent = tp->rx_opt.rcv_tsval; in tcp_store_ts_recent()
3762 tp->rx_opt.ts_recent_stamp = ktime_get_seconds(); in tcp_store_ts_recent()
3765 static void tcp_replace_ts_recent(struct tcp_sock *tp, u32 seq) in tcp_replace_ts_recent() argument
3767 if (tp->rx_opt.saw_tstamp && !after(seq, tp->rcv_wup)) { in tcp_replace_ts_recent()
3775 if (tcp_paws_check(&tp->rx_opt, 0)) in tcp_replace_ts_recent()
3776 tcp_store_ts_recent(tp); in tcp_replace_ts_recent()
3785 struct tcp_sock *tp = tcp_sk(sk); in tcp_process_tlp_ack() local
3787 if (before(ack, tp->tlp_high_seq)) in tcp_process_tlp_ack()
3790 if (!tp->tlp_retrans) { in tcp_process_tlp_ack()
3792 tp->tlp_high_seq = 0; in tcp_process_tlp_ack()
3795 tp->tlp_high_seq = 0; in tcp_process_tlp_ack()
3796 } else if (after(ack, tp->tlp_high_seq)) { in tcp_process_tlp_ack()
3809 tp->tlp_high_seq = 0; in tcp_process_tlp_ack()
3827 struct tcp_sock *tp = tcp_sk(sk); in tcp_xmit_recovery() local
3835 if (after(tp->snd_nxt, tp->high_seq)) in tcp_xmit_recovery()
3837 tp->frto = 0; in tcp_xmit_recovery()
3846 struct tcp_sock *tp = tcp_sk(sk); in tcp_newly_delivered() local
3849 delivered = tp->delivered - prior_delivered; in tcp_newly_delivered()
3861 struct tcp_sock *tp = tcp_sk(sk); in tcp_ack() local
3864 u32 prior_snd_una = tp->snd_una; in tcp_ack()
3865 bool is_sack_reneg = tp->is_sack_reneg; in tcp_ack()
3869 int prior_packets = tp->packets_out; in tcp_ack()
3870 u32 delivered = tp->delivered; in tcp_ack()
3871 u32 lost = tp->lost; in tcp_ack()
3889 max_window = min_t(u64, tp->max_window, tp->bytes_acked); in tcp_ack()
3902 if (after(ack, tp->snd_nxt)) in tcp_ack()
3916 prior_fack = tcp_is_sack(tp) ? tcp_highest_sack_seq(tp) : tp->snd_una; in tcp_ack()
3917 rs.prior_in_flight = tcp_packets_in_flight(tp); in tcp_ack()
3923 tcp_replace_ts_recent(tp, TCP_SKB_CB(skb)->seq); in tcp_ack()
3931 tcp_update_wl(tp, ack_seq); in tcp_ack()
3932 tcp_snd_una_update(tp, ack); in tcp_ack()
3952 if (tcp_ecn_rcv_ecn_echo(tp, tcp_hdr(skb))) { in tcp_ack()
3958 tcp_count_delivered(tp, sack_state.sack_delivered, in tcp_ack()
3981 tp->rcv_tstamp = tcp_jiffies32; in tcp_ack()
3991 if (tp->tlp_high_seq) in tcp_ack()
4014 lost = tp->lost - lost; /* freshly marked lost */ in tcp_ack()
4034 if (tp->tlp_high_seq) in tcp_ack()
4261 static bool tcp_parse_aligned_timestamp(struct tcp_sock *tp, const struct tcphdr *th) in tcp_parse_aligned_timestamp() argument
4267 tp->rx_opt.saw_tstamp = 1; in tcp_parse_aligned_timestamp()
4269 tp->rx_opt.rcv_tsval = ntohl(*ptr); in tcp_parse_aligned_timestamp()
4272 tp->rx_opt.rcv_tsecr = ntohl(*ptr) - tp->tsoffset; in tcp_parse_aligned_timestamp()
4274 tp->rx_opt.rcv_tsecr = 0; in tcp_parse_aligned_timestamp()
4285 const struct tcphdr *th, struct tcp_sock *tp) in tcp_fast_parse_options() argument
4291 tp->rx_opt.saw_tstamp = 0; in tcp_fast_parse_options()
4293 } else if (tp->rx_opt.tstamp_ok && in tcp_fast_parse_options()
4295 if (tcp_parse_aligned_timestamp(tp, th)) in tcp_fast_parse_options()
4299 tcp_parse_options(net, skb, &tp->rx_opt, 1, NULL); in tcp_fast_parse_options()
4300 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr) in tcp_fast_parse_options()
4301 tp->rx_opt.rcv_tsecr -= tp->tsoffset; in tcp_fast_parse_options()
4366 const struct tcp_sock *tp = tcp_sk(sk); in tcp_disordered_ack() local
4372 (th->ack && seq == TCP_SKB_CB(skb)->end_seq && seq == tp->rcv_nxt) && in tcp_disordered_ack()
4375 ack == tp->snd_una && in tcp_disordered_ack()
4378 !tcp_may_update_window(tp, ack, seq, ntohs(th->window) << tp->rx_opt.snd_wscale) && in tcp_disordered_ack()
4381 (s32)(tp->rx_opt.ts_recent - tp->rx_opt.rcv_tsval) <= (inet_csk(sk)->icsk_rto * 1024) / HZ); in tcp_disordered_ack()
4387 const struct tcp_sock *tp = tcp_sk(sk); in tcp_paws_discard() local
4389 return !tcp_paws_check(&tp->rx_opt, TCP_PAWS_WINDOW) && in tcp_paws_discard()
4406 static enum skb_drop_reason tcp_sequence(const struct tcp_sock *tp, in tcp_sequence() argument
4409 if (before(end_seq, tp->rcv_wup)) in tcp_sequence()
4412 if (after(seq, tp->rcv_nxt + tcp_receive_window(tp))) in tcp_sequence()
4478 struct tcp_sock *tp = tcp_sk(sk); in tcp_fin() local
4528 skb_rbtree_purge(&tp->out_of_order_queue); in tcp_fin()
4529 if (tcp_is_sack(tp)) in tcp_fin()
4530 tcp_sack_reset(&tp->rx_opt); in tcp_fin()
4559 struct tcp_sock *tp = tcp_sk(sk); in tcp_dsack_set() local
4561 if (tcp_is_sack(tp) && READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_dsack)) { in tcp_dsack_set()
4564 if (before(seq, tp->rcv_nxt)) in tcp_dsack_set()
4571 tp->rx_opt.dsack = 1; in tcp_dsack_set()
4572 tp->duplicate_sack[0].start_seq = seq; in tcp_dsack_set()
4573 tp->duplicate_sack[0].end_seq = end_seq; in tcp_dsack_set()
4579 struct tcp_sock *tp = tcp_sk(sk); in tcp_dsack_extend() local
4581 if (!tp->rx_opt.dsack) in tcp_dsack_extend()
4584 tcp_sack_extend(tp->duplicate_sack, seq, end_seq); in tcp_dsack_extend()
4601 struct tcp_sock *tp = tcp_sk(sk); in tcp_send_dupack() local
4604 before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { in tcp_send_dupack()
4608 if (tcp_is_sack(tp) && READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_dsack)) { in tcp_send_dupack()
4612 if (after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) in tcp_send_dupack()
4613 end_seq = tp->rcv_nxt; in tcp_send_dupack()
4624 static void tcp_sack_maybe_coalesce(struct tcp_sock *tp) in tcp_sack_maybe_coalesce() argument
4627 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_maybe_coalesce()
4633 for (this_sack = 1; this_sack < tp->rx_opt.num_sacks;) { in tcp_sack_maybe_coalesce()
4640 tp->rx_opt.num_sacks--; in tcp_sack_maybe_coalesce()
4641 for (i = this_sack; i < tp->rx_opt.num_sacks; i++) in tcp_sack_maybe_coalesce()
4652 struct tcp_sock *tp = tcp_sk(sk); in tcp_sack_compress_send_ack() local
4654 if (!tp->compressed_ack) in tcp_sack_compress_send_ack()
4657 if (hrtimer_try_to_cancel(&tp->compressed_ack_timer) == 1) in tcp_sack_compress_send_ack()
4665 tp->compressed_ack - 1); in tcp_sack_compress_send_ack()
4667 tp->compressed_ack = 0; in tcp_sack_compress_send_ack()
4679 struct tcp_sock *tp = tcp_sk(sk); in tcp_sack_new_ofo_skb() local
4680 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_new_ofo_skb()
4681 int cur_sacks = tp->rx_opt.num_sacks; in tcp_sack_new_ofo_skb()
4695 tcp_sack_maybe_coalesce(tp); in tcp_sack_new_ofo_skb()
4711 tp->rx_opt.num_sacks--; in tcp_sack_new_ofo_skb()
4721 tp->rx_opt.num_sacks++; in tcp_sack_new_ofo_skb()
4726 static void tcp_sack_remove(struct tcp_sock *tp) in tcp_sack_remove() argument
4728 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_remove()
4729 int num_sacks = tp->rx_opt.num_sacks; in tcp_sack_remove()
4733 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in tcp_sack_remove()
4734 tp->rx_opt.num_sacks = 0; in tcp_sack_remove()
4740 if (!before(tp->rcv_nxt, sp->start_seq)) { in tcp_sack_remove()
4744 WARN_ON(before(tp->rcv_nxt, sp->end_seq)); in tcp_sack_remove()
4748 tp->selective_acks[i-1] = tp->selective_acks[i]; in tcp_sack_remove()
4755 tp->rx_opt.num_sacks = num_sacks; in tcp_sack_remove()
4840 struct tcp_sock *tp = tcp_sk(sk); in tcp_ofo_queue() local
4841 __u32 dsack_high = tp->rcv_nxt; in tcp_ofo_queue()
4846 p = rb_first(&tp->out_of_order_queue); in tcp_ofo_queue()
4849 if (after(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) in tcp_ofo_queue()
4859 rb_erase(&skb->rbnode, &tp->out_of_order_queue); in tcp_ofo_queue()
4861 if (unlikely(!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt))) { in tcp_ofo_queue()
4868 tcp_rcv_nxt_update(tp, TCP_SKB_CB(skb)->end_seq); in tcp_ofo_queue()
4907 struct tcp_sock *tp = tcp_sk(sk); in tcp_data_queue_ofo() local
4923 tp->pred_flags = 0; in tcp_data_queue_ofo()
4926 tp->rcv_ooopack += max_t(u16, 1, skb_shinfo(skb)->gso_segs); in tcp_data_queue_ofo()
4931 p = &tp->out_of_order_queue.rb_node; in tcp_data_queue_ofo()
4932 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in tcp_data_queue_ofo()
4934 if (tcp_is_sack(tp)) { in tcp_data_queue_ofo()
4935 tp->rx_opt.num_sacks = 1; in tcp_data_queue_ofo()
4936 tp->selective_acks[0].start_seq = seq; in tcp_data_queue_ofo()
4937 tp->selective_acks[0].end_seq = end_seq; in tcp_data_queue_ofo()
4940 rb_insert_color(&skb->rbnode, &tp->out_of_order_queue); in tcp_data_queue_ofo()
4941 tp->ooo_last_skb = skb; in tcp_data_queue_ofo()
4948 if (tcp_ooo_try_coalesce(sk, tp->ooo_last_skb, in tcp_data_queue_ofo()
4954 if (tcp_is_sack(tp)) in tcp_data_queue_ofo()
4961 if (!before(seq, TCP_SKB_CB(tp->ooo_last_skb)->end_seq)) { in tcp_data_queue_ofo()
4962 parent = &tp->ooo_last_skb->rbnode; in tcp_data_queue_ofo()
4995 &tp->out_of_order_queue); in tcp_data_queue_ofo()
5014 rb_insert_color(&skb->rbnode, &tp->out_of_order_queue); in tcp_data_queue_ofo()
5026 rb_erase(&skb1->rbnode, &tp->out_of_order_queue); in tcp_data_queue_ofo()
5034 tp->ooo_last_skb = skb; in tcp_data_queue_ofo()
5037 if (tcp_is_sack(tp)) in tcp_data_queue_ofo()
5044 if (tcp_is_sack(tp)) in tcp_data_queue_ofo()
5128 struct tcp_sock *tp = tcp_sk(sk); in tcp_data_queue() local
5149 tp->rx_opt.dsack = 0; in tcp_data_queue()
5155 if (TCP_SKB_CB(skb)->seq == tp->rcv_nxt) { in tcp_data_queue()
5156 if (tcp_receive_window(tp) == 0) { in tcp_data_queue()
5185 if (!RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in tcp_data_queue()
5191 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) in tcp_data_queue()
5195 if (tp->rx_opt.num_sacks) in tcp_data_queue()
5196 tcp_sack_remove(tp); in tcp_data_queue()
5207 if (!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) { in tcp_data_queue()
5224 tp->rcv_nxt + tcp_receive_window(tp))) { in tcp_data_queue()
5229 if (before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { in tcp_data_queue()
5231 tcp_dsack_set(sk, TCP_SKB_CB(skb)->seq, tp->rcv_nxt); in tcp_data_queue()
5236 if (!tcp_receive_window(tp)) { in tcp_data_queue()
5407 struct tcp_sock *tp = tcp_sk(sk); in tcp_collapse_ofo_queue() local
5412 skb = skb_rb_first(&tp->out_of_order_queue); in tcp_collapse_ofo_queue()
5415 tp->ooo_last_skb = skb_rb_last(&tp->out_of_order_queue); in tcp_collapse_ofo_queue()
5434 tcp_collapse(sk, NULL, &tp->out_of_order_queue, in tcp_collapse_ofo_queue()
5467 struct tcp_sock *tp = tcp_sk(sk); in tcp_prune_ofo_queue() local
5472 if (RB_EMPTY_ROOT(&tp->out_of_order_queue)) in tcp_prune_ofo_queue()
5476 node = &tp->ooo_last_skb->rbnode; in tcp_prune_ofo_queue()
5486 rb_erase(node, &tp->out_of_order_queue); in tcp_prune_ofo_queue()
5489 tp->ooo_last_skb = rb_to_skb(prev); in tcp_prune_ofo_queue()
5506 if (tp->rx_opt.sack_ok) in tcp_prune_ofo_queue()
5507 tcp_sack_reset(&tp->rx_opt); in tcp_prune_ofo_queue()
5521 struct tcp_sock *tp = tcp_sk(sk); in tcp_prune_queue() local
5538 tp->copied_seq, tp->rcv_nxt); in tcp_prune_queue()
5558 tp->pred_flags = 0; in tcp_prune_queue()
5564 const struct tcp_sock *tp = tcp_sk(sk); in tcp_should_expand_sndbuf() local
5591 if (tcp_packets_in_flight(tp) >= tcp_snd_cwnd(tp)) in tcp_should_expand_sndbuf()
5599 struct tcp_sock *tp = tcp_sk(sk); in tcp_new_space() local
5603 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_new_space()
5642 struct tcp_sock *tp = tcp_sk(sk); in __tcp_ack_snd_check() local
5646 if (((tp->rcv_nxt - tp->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss && in __tcp_ack_snd_check()
5652 (tp->rcv_nxt - tp->copied_seq < sk->sk_rcvlowat || in __tcp_ack_snd_check()
5653 __tcp_select_window(sk) >= tp->rcv_wnd)) || in __tcp_ack_snd_check()
5663 if (!ofo_possible || RB_EMPTY_ROOT(&tp->out_of_order_queue)) { in __tcp_ack_snd_check()
5668 if (!tcp_is_sack(tp) || in __tcp_ack_snd_check()
5669 tp->compressed_ack >= READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_comp_sack_nr)) in __tcp_ack_snd_check()
5672 if (tp->compressed_ack_rcv_nxt != tp->rcv_nxt) { in __tcp_ack_snd_check()
5673 tp->compressed_ack_rcv_nxt = tp->rcv_nxt; in __tcp_ack_snd_check()
5674 tp->dup_ack_counter = 0; in __tcp_ack_snd_check()
5676 if (tp->dup_ack_counter < TCP_FASTRETRANS_THRESH) { in __tcp_ack_snd_check()
5677 tp->dup_ack_counter++; in __tcp_ack_snd_check()
5680 tp->compressed_ack++; in __tcp_ack_snd_check()
5681 if (hrtimer_is_queued(&tp->compressed_ack_timer)) in __tcp_ack_snd_check()
5686 rtt = tp->rcv_rtt_est.rtt_us; in __tcp_ack_snd_check()
5687 if (tp->srtt_us && tp->srtt_us < rtt) in __tcp_ack_snd_check()
5688 rtt = tp->srtt_us; in __tcp_ack_snd_check()
5694 hrtimer_start_range_ns(&tp->compressed_ack_timer, ns_to_ktime(delay), in __tcp_ack_snd_check()
5720 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_urg() local
5728 if (after(tp->copied_seq, ptr)) in tcp_check_urg()
5741 if (before(ptr, tp->rcv_nxt)) in tcp_check_urg()
5745 if (tp->urg_data && !after(ptr, tp->urg_seq)) in tcp_check_urg()
5766 if (tp->urg_seq == tp->copied_seq && tp->urg_data && in tcp_check_urg()
5767 !sock_flag(sk, SOCK_URGINLINE) && tp->copied_seq != tp->rcv_nxt) { in tcp_check_urg()
5769 tp->copied_seq++; in tcp_check_urg()
5770 if (skb && !before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq)) { in tcp_check_urg()
5776 WRITE_ONCE(tp->urg_data, TCP_URG_NOTYET); in tcp_check_urg()
5777 WRITE_ONCE(tp->urg_seq, ptr); in tcp_check_urg()
5780 tp->pred_flags = 0; in tcp_check_urg()
5786 struct tcp_sock *tp = tcp_sk(sk); in tcp_urg() local
5793 if (unlikely(tp->urg_data == TCP_URG_NOTYET)) { in tcp_urg()
5794 u32 ptr = tp->urg_seq - ntohl(th->seq) + (th->doff * 4) - in tcp_urg()
5802 WRITE_ONCE(tp->urg_data, TCP_URG_VALID | tmp); in tcp_urg()
5819 const struct tcp_sock *tp = tcp_sk(sk); in tcp_reset_check() local
5821 return unlikely(TCP_SKB_CB(skb)->seq == (tp->rcv_nxt - 1) && in tcp_reset_check()
5832 struct tcp_sock *tp = tcp_sk(sk); in tcp_validate_incoming() local
5836 if (tcp_fast_parse_options(sock_net(sk), skb, th, tp) && in tcp_validate_incoming()
5837 tp->rx_opt.saw_tstamp && in tcp_validate_incoming()
5845 &tp->last_oow_ack_time)) in tcp_validate_incoming()
5854 reason = tcp_sequence(tp, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq); in tcp_validate_incoming()
5867 &tp->last_oow_ack_time)) in tcp_validate_incoming()
5886 if (TCP_SKB_CB(skb)->seq == tp->rcv_nxt || in tcp_validate_incoming()
5890 if (tcp_is_sack(tp) && tp->rx_opt.num_sacks > 0) { in tcp_validate_incoming()
5891 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_validate_incoming()
5895 for (this_sack = 1; this_sack < tp->rx_opt.num_sacks; in tcp_validate_incoming()
5910 if (tp->syn_fastopen && !tp->data_segs_in && in tcp_validate_incoming()
5926 TCP_SKB_CB(skb)->seq + 1 == tp->rcv_nxt && in tcp_validate_incoming()
5927 TCP_SKB_CB(skb)->ack_seq == tp->snd_nxt) in tcp_validate_incoming()
5980 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_established() local
5986 tcp_mstamp_refresh(tp); in tcp_rcv_established()
6004 tp->rx_opt.saw_tstamp = 0; in tcp_rcv_established()
6015 if ((tcp_flag_word(th) & TCP_HP_BITS) == tp->pred_flags && in tcp_rcv_established()
6016 TCP_SKB_CB(skb)->seq == tp->rcv_nxt && in tcp_rcv_established()
6017 !after(TCP_SKB_CB(skb)->ack_seq, tp->snd_nxt)) { in tcp_rcv_established()
6018 int tcp_header_len = tp->tcp_header_len; in tcp_rcv_established()
6028 if (!tcp_parse_aligned_timestamp(tp, th)) in tcp_rcv_established()
6032 if ((s32)(tp->rx_opt.rcv_tsval - tp->rx_opt.ts_recent) < 0) in tcp_rcv_established()
6051 tp->rcv_nxt == tp->rcv_wup) in tcp_rcv_established()
6052 tcp_store_ts_recent(tp); in tcp_rcv_established()
6064 tp->rcv_rtt_last_tsecr = tp->rx_opt.rcv_tsecr; in tcp_rcv_established()
6087 tp->rcv_nxt == tp->rcv_wup) in tcp_rcv_established()
6088 tcp_store_ts_recent(tp); in tcp_rcv_established()
6101 if (TCP_SKB_CB(skb)->ack_seq != tp->snd_una) { in tcp_rcv_established()
6108 tcp_update_wl(tp, TCP_SKB_CB(skb)->seq); in tcp_rcv_established()
6168 struct tcp_sock *tp = tcp_sk(sk); in tcp_init_transfer() local
6180 if (tp->total_retrans > 1 && tp->undo_marker) in tcp_init_transfer()
6181 tcp_snd_cwnd_set(tp, 1); in tcp_init_transfer()
6183 tcp_snd_cwnd_set(tp, tcp_init_cwnd(tp, __sk_dst_get(sk))); in tcp_init_transfer()
6184 tp->snd_cwnd_stamp = tcp_jiffies32; in tcp_init_transfer()
6195 struct tcp_sock *tp = tcp_sk(sk); in tcp_finish_connect() local
6212 tp->lsndtime = tcp_jiffies32; in tcp_finish_connect()
6215 inet_csk_reset_keepalive_timer(sk, keepalive_time_when(tp)); in tcp_finish_connect()
6217 if (!tp->rx_opt.snd_wscale) in tcp_finish_connect()
6218 __tcp_fast_path_on(tp, tp->snd_wnd); in tcp_finish_connect()
6220 tp->pred_flags = 0; in tcp_finish_connect()
6226 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_fastopen_synack() local
6227 struct sk_buff *data = tp->syn_data ? tcp_rtx_queue_head(sk) : NULL; in tcp_rcv_fastopen_synack()
6228 u16 mss = tp->rx_opt.mss_clamp, try_exp = 0; in tcp_rcv_fastopen_synack()
6231 if (mss == tp->rx_opt.user_mss) { in tcp_rcv_fastopen_synack()
6241 if (!tp->syn_fastopen) { in tcp_rcv_fastopen_synack()
6244 } else if (tp->total_retrans) { in tcp_rcv_fastopen_synack()
6251 } else if (cookie->len < 0 && !tp->syn_data) { in tcp_rcv_fastopen_synack()
6256 try_exp = tp->syn_fastopen_exp ? 2 : 1; in tcp_rcv_fastopen_synack()
6262 if (tp->total_retrans) in tcp_rcv_fastopen_synack()
6263 tp->fastopen_client_fail = TFO_SYN_RETRANSMITTED; in tcp_rcv_fastopen_synack()
6265 tp->fastopen_client_fail = TFO_DATA_NOT_ACKED; in tcp_rcv_fastopen_synack()
6273 tp->syn_data_acked = tp->syn_data; in tcp_rcv_fastopen_synack()
6274 if (tp->syn_data_acked) { in tcp_rcv_fastopen_synack()
6277 if (tp->delivered > 1) in tcp_rcv_fastopen_synack()
6278 --tp->delivered; in tcp_rcv_fastopen_synack()
6286 static void smc_check_reset_syn(struct tcp_sock *tp) in smc_check_reset_syn() argument
6290 if (tp->syn_smc && !tp->rx_opt.smc_ok) in smc_check_reset_syn()
6291 tp->syn_smc = 0; in smc_check_reset_syn()
6298 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_spurious_syn() local
6305 syn_stamp = tp->retrans_stamp; in tcp_try_undo_spurious_syn()
6306 if (tp->undo_marker && syn_stamp && tp->rx_opt.saw_tstamp && in tcp_try_undo_spurious_syn()
6307 syn_stamp == tp->rx_opt.rcv_tsecr) in tcp_try_undo_spurious_syn()
6308 tp->undo_marker = 0; in tcp_try_undo_spurious_syn()
6315 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_synsent_state_process() local
6317 int saved_clamp = tp->rx_opt.mss_clamp; in tcp_rcv_synsent_state_process()
6321 tcp_parse_options(sock_net(sk), skb, &tp->rx_opt, 0, &foc); in tcp_rcv_synsent_state_process()
6322 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr) in tcp_rcv_synsent_state_process()
6323 tp->rx_opt.rcv_tsecr -= tp->tsoffset; in tcp_rcv_synsent_state_process()
6334 if (!after(TCP_SKB_CB(skb)->ack_seq, tp->snd_una) || in tcp_rcv_synsent_state_process()
6335 after(TCP_SKB_CB(skb)->ack_seq, tp->snd_nxt)) { in tcp_rcv_synsent_state_process()
6344 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_rcv_synsent_state_process()
6345 !between(tp->rx_opt.rcv_tsecr, tp->retrans_stamp, in tcp_rcv_synsent_state_process()
6346 tcp_time_stamp(tp))) { in tcp_rcv_synsent_state_process()
6385 tcp_ecn_rcv_synack(tp, th); in tcp_rcv_synsent_state_process()
6387 tcp_init_wl(tp, TCP_SKB_CB(skb)->seq); in tcp_rcv_synsent_state_process()
6394 WRITE_ONCE(tp->rcv_nxt, TCP_SKB_CB(skb)->seq + 1); in tcp_rcv_synsent_state_process()
6395 tp->rcv_wup = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
6400 tp->snd_wnd = ntohs(th->window); in tcp_rcv_synsent_state_process()
6402 if (!tp->rx_opt.wscale_ok) { in tcp_rcv_synsent_state_process()
6403 tp->rx_opt.snd_wscale = tp->rx_opt.rcv_wscale = 0; in tcp_rcv_synsent_state_process()
6404 WRITE_ONCE(tp->window_clamp, in tcp_rcv_synsent_state_process()
6405 min(tp->window_clamp, 65535U)); in tcp_rcv_synsent_state_process()
6408 if (tp->rx_opt.saw_tstamp) { in tcp_rcv_synsent_state_process()
6409 tp->rx_opt.tstamp_ok = 1; in tcp_rcv_synsent_state_process()
6410 tp->tcp_header_len = in tcp_rcv_synsent_state_process()
6412 tp->advmss -= TCPOLEN_TSTAMP_ALIGNED; in tcp_rcv_synsent_state_process()
6413 tcp_store_ts_recent(tp); in tcp_rcv_synsent_state_process()
6415 tp->tcp_header_len = sizeof(struct tcphdr); in tcp_rcv_synsent_state_process()
6424 WRITE_ONCE(tp->copied_seq, tp->rcv_nxt); in tcp_rcv_synsent_state_process()
6426 smc_check_reset_syn(tp); in tcp_rcv_synsent_state_process()
6432 fastopen_fail = (tp->syn_fastopen || tp->syn_data) && in tcp_rcv_synsent_state_process()
6474 if (tp->rx_opt.ts_recent_stamp && tp->rx_opt.saw_tstamp && in tcp_rcv_synsent_state_process()
6475 tcp_paws_reject(&tp->rx_opt, 0)) { in tcp_rcv_synsent_state_process()
6486 if (tp->rx_opt.saw_tstamp) { in tcp_rcv_synsent_state_process()
6487 tp->rx_opt.tstamp_ok = 1; in tcp_rcv_synsent_state_process()
6488 tcp_store_ts_recent(tp); in tcp_rcv_synsent_state_process()
6489 tp->tcp_header_len = in tcp_rcv_synsent_state_process()
6492 tp->tcp_header_len = sizeof(struct tcphdr); in tcp_rcv_synsent_state_process()
6495 WRITE_ONCE(tp->rcv_nxt, TCP_SKB_CB(skb)->seq + 1); in tcp_rcv_synsent_state_process()
6496 WRITE_ONCE(tp->copied_seq, tp->rcv_nxt); in tcp_rcv_synsent_state_process()
6497 tp->rcv_wup = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
6502 tp->snd_wnd = ntohs(th->window); in tcp_rcv_synsent_state_process()
6503 tp->snd_wl1 = TCP_SKB_CB(skb)->seq; in tcp_rcv_synsent_state_process()
6504 tp->max_window = tp->snd_wnd; in tcp_rcv_synsent_state_process()
6506 tcp_ecn_rcv_syn(tp, th); in tcp_rcv_synsent_state_process()
6535 tcp_clear_options(&tp->rx_opt); in tcp_rcv_synsent_state_process()
6536 tp->rx_opt.mss_clamp = saved_clamp; in tcp_rcv_synsent_state_process()
6541 tcp_clear_options(&tp->rx_opt); in tcp_rcv_synsent_state_process()
6542 tp->rx_opt.mss_clamp = saved_clamp; in tcp_rcv_synsent_state_process()
6548 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_synrecv_state_fastopen() local
6554 if (inet_csk(sk)->icsk_ca_state == TCP_CA_Loss && !tp->packets_out) in tcp_rcv_synrecv_state_fastopen()
6557 tcp_update_rto_time(tp); in tcp_rcv_synrecv_state_fastopen()
6572 req = rcu_dereference_protected(tp->fastopen_rsk, in tcp_rcv_synrecv_state_fastopen()
6596 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_state_process() local
6640 tp->rx_opt.saw_tstamp = 0; in tcp_rcv_state_process()
6641 tcp_mstamp_refresh(tp); in tcp_rcv_state_process()
6653 tcp_mstamp_refresh(tp); in tcp_rcv_state_process()
6654 tp->rx_opt.saw_tstamp = 0; in tcp_rcv_state_process()
6655 req = rcu_dereference_protected(tp->fastopen_rsk, in tcp_rcv_state_process()
6690 tp->delivered++; /* SYN-ACK delivery isn't tracked in tcp_ack */ in tcp_rcv_state_process()
6691 if (!tp->srtt_us) in tcp_rcv_state_process()
6698 tp->retrans_stamp = 0; in tcp_rcv_state_process()
6701 WRITE_ONCE(tp->copied_seq, tp->rcv_nxt); in tcp_rcv_state_process()
6714 tp->snd_una = TCP_SKB_CB(skb)->ack_seq; in tcp_rcv_state_process()
6715 tp->snd_wnd = ntohs(th->window) << tp->rx_opt.snd_wscale; in tcp_rcv_state_process()
6716 tcp_init_wl(tp, TCP_SKB_CB(skb)->seq); in tcp_rcv_state_process()
6718 if (tp->rx_opt.tstamp_ok) in tcp_rcv_state_process()
6719 tp->advmss -= TCPOLEN_TSTAMP_ALIGNED; in tcp_rcv_state_process()
6725 tp->lsndtime = tcp_jiffies32; in tcp_rcv_state_process()
6728 tcp_fast_path_on(tp); in tcp_rcv_state_process()
6739 if (tp->snd_una != tp->write_seq) in tcp_rcv_state_process()
6753 if (READ_ONCE(tp->linger2) < 0) { in tcp_rcv_state_process()
6759 after(TCP_SKB_CB(skb)->end_seq - th->fin, tp->rcv_nxt)) { in tcp_rcv_state_process()
6761 if (tp->syn_fastopen && th->fin) in tcp_rcv_state_process()
6787 if (tp->snd_una == tp->write_seq) { in tcp_rcv_state_process()
6794 if (tp->snd_una == tp->write_seq) { in tcp_rcv_state_process()
6810 if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { in tcp_rcv_state_process()
6827 after(TCP_SKB_CB(skb)->end_seq - th->fin, tp->rcv_nxt)) { in tcp_rcv_state_process()
7042 struct tcp_sock *tp = tcp_sk(sk); in tcp_get_syncookie_mss() local
7057 mss = tcp_parse_mss_option(th, tp->rx_opt.user_mss); in tcp_get_syncookie_mss()
7072 struct tcp_sock *tp = tcp_sk(sk); in tcp_conn_request() local
7111 tmp_opt.user_mss = tp->rx_opt.user_mss; in tcp_conn_request()