Lines Matching refs:tp
210 static void tcp_ecn_queue_cwr(struct tcp_sock *tp) in tcp_ecn_queue_cwr() argument
212 if (tp->ecn_flags & TCP_ECN_OK) in tcp_ecn_queue_cwr()
213 tp->ecn_flags |= TCP_ECN_QUEUE_CWR; in tcp_ecn_queue_cwr()
216 static void tcp_ecn_accept_cwr(struct tcp_sock *tp, const struct sk_buff *skb) in tcp_ecn_accept_cwr() argument
219 tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR; in tcp_ecn_accept_cwr()
222 static void tcp_ecn_withdraw_cwr(struct tcp_sock *tp) in tcp_ecn_withdraw_cwr() argument
224 tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR; in tcp_ecn_withdraw_cwr()
227 static void __tcp_ecn_check_ce(struct tcp_sock *tp, const struct sk_buff *skb) in __tcp_ecn_check_ce() argument
235 if (tp->ecn_flags & TCP_ECN_SEEN) in __tcp_ecn_check_ce()
236 tcp_enter_quickack_mode((struct sock *)tp); in __tcp_ecn_check_ce()
239 if (tcp_ca_needs_ecn((struct sock *)tp)) in __tcp_ecn_check_ce()
240 tcp_ca_event((struct sock *)tp, CA_EVENT_ECN_IS_CE); in __tcp_ecn_check_ce()
242 if (!(tp->ecn_flags & TCP_ECN_DEMAND_CWR)) { in __tcp_ecn_check_ce()
244 tcp_enter_quickack_mode((struct sock *)tp); in __tcp_ecn_check_ce()
245 tp->ecn_flags |= TCP_ECN_DEMAND_CWR; in __tcp_ecn_check_ce()
247 tp->ecn_flags |= TCP_ECN_SEEN; in __tcp_ecn_check_ce()
250 if (tcp_ca_needs_ecn((struct sock *)tp)) in __tcp_ecn_check_ce()
251 tcp_ca_event((struct sock *)tp, CA_EVENT_ECN_NO_CE); in __tcp_ecn_check_ce()
252 tp->ecn_flags |= TCP_ECN_SEEN; in __tcp_ecn_check_ce()
257 static void tcp_ecn_check_ce(struct tcp_sock *tp, const struct sk_buff *skb) in tcp_ecn_check_ce() argument
259 if (tp->ecn_flags & TCP_ECN_OK) in tcp_ecn_check_ce()
260 __tcp_ecn_check_ce(tp, skb); in tcp_ecn_check_ce()
263 static void tcp_ecn_rcv_synack(struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_synack() argument
265 if ((tp->ecn_flags & TCP_ECN_OK) && (!th->ece || th->cwr)) in tcp_ecn_rcv_synack()
266 tp->ecn_flags &= ~TCP_ECN_OK; in tcp_ecn_rcv_synack()
269 static void tcp_ecn_rcv_syn(struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_syn() argument
271 if ((tp->ecn_flags & TCP_ECN_OK) && (!th->ece || !th->cwr)) in tcp_ecn_rcv_syn()
272 tp->ecn_flags &= ~TCP_ECN_OK; in tcp_ecn_rcv_syn()
275 static bool tcp_ecn_rcv_ecn_echo(const struct tcp_sock *tp, const struct tcphdr *th) in tcp_ecn_rcv_ecn_echo() argument
277 if (th->ece && !th->syn && (tp->ecn_flags & TCP_ECN_OK)) in tcp_ecn_rcv_ecn_echo()
289 const struct tcp_sock *tp = tcp_sk(sk); in tcp_sndbuf_expand() local
296 per_mss = max_t(u32, tp->rx_opt.mss_clamp, tp->mss_cache) + in tcp_sndbuf_expand()
303 nr_segs = max_t(u32, TCP_INIT_CWND, tp->snd_cwnd); in tcp_sndbuf_expand()
304 nr_segs = max_t(u32, nr_segs, tp->reordering + 1); in tcp_sndbuf_expand()
344 struct tcp_sock *tp = tcp_sk(sk); in __tcp_grow_window() local
349 while (tp->rcv_ssthresh <= window) { in __tcp_grow_window()
361 struct tcp_sock *tp = tcp_sk(sk); in tcp_grow_window() local
364 if (tp->rcv_ssthresh < tp->window_clamp && in tcp_grow_window()
365 (int)tp->rcv_ssthresh < tcp_space(sk) && in tcp_grow_window()
373 incr = 2 * tp->advmss; in tcp_grow_window()
379 tp->rcv_ssthresh = min(tp->rcv_ssthresh + incr, in tcp_grow_window()
380 tp->window_clamp); in tcp_grow_window()
410 struct tcp_sock *tp = tcp_sk(sk); in tcp_init_buffer_space() local
418 tp->rcvq_space.space = tp->rcv_wnd; in tcp_init_buffer_space()
419 tp->rcvq_space.time = tcp_time_stamp; in tcp_init_buffer_space()
420 tp->rcvq_space.seq = tp->copied_seq; in tcp_init_buffer_space()
424 if (tp->window_clamp >= maxwin) { in tcp_init_buffer_space()
425 tp->window_clamp = maxwin; in tcp_init_buffer_space()
427 if (sysctl_tcp_app_win && maxwin > 4 * tp->advmss) in tcp_init_buffer_space()
428 tp->window_clamp = max(maxwin - in tcp_init_buffer_space()
430 4 * tp->advmss); in tcp_init_buffer_space()
435 tp->window_clamp > 2 * tp->advmss && in tcp_init_buffer_space()
436 tp->window_clamp + tp->advmss > maxwin) in tcp_init_buffer_space()
437 tp->window_clamp = max(2 * tp->advmss, maxwin - tp->advmss); in tcp_init_buffer_space()
439 tp->rcv_ssthresh = min(tp->rcv_ssthresh, tp->window_clamp); in tcp_init_buffer_space()
440 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_init_buffer_space()
446 struct tcp_sock *tp = tcp_sk(sk); in tcp_clamp_window() local
459 tp->rcv_ssthresh = min(tp->window_clamp, 2U * tp->advmss); in tcp_clamp_window()
471 const struct tcp_sock *tp = tcp_sk(sk); in tcp_initialize_rcv_mss() local
472 unsigned int hint = min_t(unsigned int, tp->advmss, tp->mss_cache); in tcp_initialize_rcv_mss()
474 hint = min(hint, tp->rcv_wnd / 2); in tcp_initialize_rcv_mss()
493 static void tcp_rcv_rtt_update(struct tcp_sock *tp, u32 sample, int win_dep) in tcp_rcv_rtt_update() argument
495 u32 new_sample = tp->rcv_rtt_est.rtt; in tcp_rcv_rtt_update()
525 if (tp->rcv_rtt_est.rtt != new_sample) in tcp_rcv_rtt_update()
526 tp->rcv_rtt_est.rtt = new_sample; in tcp_rcv_rtt_update()
529 static inline void tcp_rcv_rtt_measure(struct tcp_sock *tp) in tcp_rcv_rtt_measure() argument
531 if (tp->rcv_rtt_est.time == 0) in tcp_rcv_rtt_measure()
533 if (before(tp->rcv_nxt, tp->rcv_rtt_est.seq)) in tcp_rcv_rtt_measure()
535 tcp_rcv_rtt_update(tp, tcp_time_stamp - tp->rcv_rtt_est.time, 1); in tcp_rcv_rtt_measure()
538 tp->rcv_rtt_est.seq = tp->rcv_nxt + tp->rcv_wnd; in tcp_rcv_rtt_measure()
539 tp->rcv_rtt_est.time = tcp_time_stamp; in tcp_rcv_rtt_measure()
545 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_rtt_measure_ts() local
546 if (tp->rx_opt.rcv_tsecr && in tcp_rcv_rtt_measure_ts()
549 tcp_rcv_rtt_update(tp, tcp_time_stamp - tp->rx_opt.rcv_tsecr, 0); in tcp_rcv_rtt_measure_ts()
558 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_space_adjust() local
562 time = tcp_time_stamp - tp->rcvq_space.time; in tcp_rcv_space_adjust()
563 if (time < (tp->rcv_rtt_est.rtt >> 3) || tp->rcv_rtt_est.rtt == 0) in tcp_rcv_space_adjust()
567 copied = tp->copied_seq - tp->rcvq_space.seq; in tcp_rcv_space_adjust()
568 if (copied <= tp->rcvq_space.space) in tcp_rcv_space_adjust()
587 rcvwin = (copied << 1) + 16 * tp->advmss; in tcp_rcv_space_adjust()
595 tp->rcvq_space.space + (tp->rcvq_space.space >> 2)) { in tcp_rcv_space_adjust()
597 tp->rcvq_space.space + (tp->rcvq_space.space >> 1)) in tcp_rcv_space_adjust()
603 rcvmem = SKB_TRUESIZE(tp->advmss + MAX_TCP_HEADER); in tcp_rcv_space_adjust()
604 while (tcp_win_from_space(rcvmem) < tp->advmss) in tcp_rcv_space_adjust()
607 rcvbuf = min(rcvwin / tp->advmss * rcvmem, sysctl_tcp_rmem[2]); in tcp_rcv_space_adjust()
612 tp->window_clamp = rcvwin; in tcp_rcv_space_adjust()
615 tp->rcvq_space.space = copied; in tcp_rcv_space_adjust()
618 tp->rcvq_space.seq = tp->copied_seq; in tcp_rcv_space_adjust()
619 tp->rcvq_space.time = tcp_time_stamp; in tcp_rcv_space_adjust()
634 struct tcp_sock *tp = tcp_sk(sk); in tcp_event_data_recv() local
642 tcp_rcv_rtt_measure(tp); in tcp_event_data_recv()
672 tcp_ecn_check_ce(tp, skb); in tcp_event_data_recv()
689 struct tcp_sock *tp = tcp_sk(sk); in tcp_rtt_estimator() local
691 u32 srtt = tp->srtt_us; in tcp_rtt_estimator()
714 m -= (tp->mdev_us >> 2); /* similar update on mdev */ in tcp_rtt_estimator()
726 m -= (tp->mdev_us >> 2); /* similar update on mdev */ in tcp_rtt_estimator()
728 tp->mdev_us += m; /* mdev = 3/4 mdev + 1/4 new */ in tcp_rtt_estimator()
729 if (tp->mdev_us > tp->mdev_max_us) { in tcp_rtt_estimator()
730 tp->mdev_max_us = tp->mdev_us; in tcp_rtt_estimator()
731 if (tp->mdev_max_us > tp->rttvar_us) in tcp_rtt_estimator()
732 tp->rttvar_us = tp->mdev_max_us; in tcp_rtt_estimator()
734 if (after(tp->snd_una, tp->rtt_seq)) { in tcp_rtt_estimator()
735 if (tp->mdev_max_us < tp->rttvar_us) in tcp_rtt_estimator()
736 tp->rttvar_us -= (tp->rttvar_us - tp->mdev_max_us) >> 2; in tcp_rtt_estimator()
737 tp->rtt_seq = tp->snd_nxt; in tcp_rtt_estimator()
738 tp->mdev_max_us = tcp_rto_min_us(sk); in tcp_rtt_estimator()
743 tp->mdev_us = m << 1; /* make sure rto = 3*rtt */ in tcp_rtt_estimator()
744 tp->rttvar_us = max(tp->mdev_us, tcp_rto_min_us(sk)); in tcp_rtt_estimator()
745 tp->mdev_max_us = tp->rttvar_us; in tcp_rtt_estimator()
746 tp->rtt_seq = tp->snd_nxt; in tcp_rtt_estimator()
748 tp->srtt_us = max(1U, srtt); in tcp_rtt_estimator()
762 const struct tcp_sock *tp = tcp_sk(sk); in tcp_update_pacing_rate() local
766 rate = (u64)tp->mss_cache * ((USEC_PER_SEC / 100) << 3); in tcp_update_pacing_rate()
776 if (tp->snd_cwnd < tp->snd_ssthresh / 2) in tcp_update_pacing_rate()
781 rate *= max(tp->snd_cwnd, tp->packets_out); in tcp_update_pacing_rate()
783 if (likely(tp->srtt_us)) in tcp_update_pacing_rate()
784 do_div(rate, tp->srtt_us); in tcp_update_pacing_rate()
799 const struct tcp_sock *tp = tcp_sk(sk); in tcp_set_rto() local
810 inet_csk(sk)->icsk_rto = __tcp_set_rto(tp); in tcp_set_rto()
824 __u32 tcp_init_cwnd(const struct tcp_sock *tp, const struct dst_entry *dst) in tcp_init_cwnd() argument
830 return min_t(__u32, cwnd, tp->snd_cwnd_clamp); in tcp_init_cwnd()
837 void tcp_disable_fack(struct tcp_sock *tp) in tcp_disable_fack() argument
840 if (tcp_is_fack(tp)) in tcp_disable_fack()
841 tp->lost_skb_hint = NULL; in tcp_disable_fack()
842 tp->rx_opt.sack_ok &= ~TCP_FACK_ENABLED; in tcp_disable_fack()
846 static void tcp_dsack_seen(struct tcp_sock *tp) in tcp_dsack_seen() argument
848 tp->rx_opt.sack_ok |= TCP_DSACK_SEEN; in tcp_dsack_seen()
854 struct tcp_sock *tp = tcp_sk(sk); in tcp_update_reordering() local
855 if (metric > tp->reordering) { in tcp_update_reordering()
858 tp->reordering = min(sysctl_tcp_max_reordering, metric); in tcp_update_reordering()
863 else if (tcp_is_reno(tp)) in tcp_update_reordering()
865 else if (tcp_is_fack(tp)) in tcp_update_reordering()
873 tp->rx_opt.sack_ok, inet_csk(sk)->icsk_ca_state, in tcp_update_reordering()
874 tp->reordering, in tcp_update_reordering()
875 tp->fackets_out, in tcp_update_reordering()
876 tp->sacked_out, in tcp_update_reordering()
877 tp->undo_marker ? tp->undo_retrans : 0); in tcp_update_reordering()
879 tcp_disable_fack(tp); in tcp_update_reordering()
883 tcp_disable_early_retrans(tp); in tcp_update_reordering()
884 tp->rack.reord = 1; in tcp_update_reordering()
888 static void tcp_verify_retransmit_hint(struct tcp_sock *tp, struct sk_buff *skb) in tcp_verify_retransmit_hint() argument
890 if (!tp->retransmit_skb_hint || in tcp_verify_retransmit_hint()
892 TCP_SKB_CB(tp->retransmit_skb_hint)->seq)) in tcp_verify_retransmit_hint()
893 tp->retransmit_skb_hint = skb; in tcp_verify_retransmit_hint()
895 if (!tp->lost_out || in tcp_verify_retransmit_hint()
896 after(TCP_SKB_CB(skb)->end_seq, tp->retransmit_high)) in tcp_verify_retransmit_hint()
897 tp->retransmit_high = TCP_SKB_CB(skb)->end_seq; in tcp_verify_retransmit_hint()
900 static void tcp_skb_mark_lost(struct tcp_sock *tp, struct sk_buff *skb) in tcp_skb_mark_lost() argument
903 tcp_verify_retransmit_hint(tp, skb); in tcp_skb_mark_lost()
905 tp->lost_out += tcp_skb_pcount(skb); in tcp_skb_mark_lost()
910 void tcp_skb_mark_lost_uncond_verify(struct tcp_sock *tp, struct sk_buff *skb) in tcp_skb_mark_lost_uncond_verify() argument
912 tcp_verify_retransmit_hint(tp, skb); in tcp_skb_mark_lost_uncond_verify()
915 tp->lost_out += tcp_skb_pcount(skb); in tcp_skb_mark_lost_uncond_verify()
1014 static bool tcp_is_sackblock_valid(struct tcp_sock *tp, bool is_dsack, in tcp_is_sackblock_valid() argument
1018 if (after(end_seq, tp->snd_nxt) || !before(start_seq, end_seq)) in tcp_is_sackblock_valid()
1022 if (!before(start_seq, tp->snd_nxt)) in tcp_is_sackblock_valid()
1028 if (after(start_seq, tp->snd_una)) in tcp_is_sackblock_valid()
1031 if (!is_dsack || !tp->undo_marker) in tcp_is_sackblock_valid()
1035 if (after(end_seq, tp->snd_una)) in tcp_is_sackblock_valid()
1038 if (!before(start_seq, tp->undo_marker)) in tcp_is_sackblock_valid()
1042 if (!after(end_seq, tp->undo_marker)) in tcp_is_sackblock_valid()
1048 return !before(start_seq, end_seq - tp->max_window); in tcp_is_sackblock_valid()
1055 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_dsack() local
1062 tcp_dsack_seen(tp); in tcp_check_dsack()
1071 tcp_dsack_seen(tp); in tcp_check_dsack()
1078 if (dup_sack && tp->undo_marker && tp->undo_retrans > 0 && in tcp_check_dsack()
1080 after(end_seq_0, tp->undo_marker)) in tcp_check_dsack()
1081 tp->undo_retrans--; in tcp_check_dsack()
1159 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_one() local
1164 if (tp->undo_marker && tp->undo_retrans > 0 && in tcp_sacktag_one()
1165 after(end_seq, tp->undo_marker)) in tcp_sacktag_one()
1166 tp->undo_retrans--; in tcp_sacktag_one()
1172 if (!after(end_seq, tp->snd_una)) in tcp_sacktag_one()
1176 tcp_rack_advance(tp, xmit_time, sacked); in tcp_sacktag_one()
1185 tp->lost_out -= pcount; in tcp_sacktag_one()
1186 tp->retrans_out -= pcount; in tcp_sacktag_one()
1194 tcp_highest_sack_seq(tp))) in tcp_sacktag_one()
1197 if (!after(end_seq, tp->high_seq)) in tcp_sacktag_one()
1206 tp->lost_out -= pcount; in tcp_sacktag_one()
1212 tp->sacked_out += pcount; in tcp_sacktag_one()
1217 if (!tcp_is_fack(tp) && tp->lost_skb_hint && in tcp_sacktag_one()
1218 before(start_seq, TCP_SKB_CB(tp->lost_skb_hint)->seq)) in tcp_sacktag_one()
1219 tp->lost_cnt_hint += pcount; in tcp_sacktag_one()
1221 if (fack_count > tp->fackets_out) in tcp_sacktag_one()
1222 tp->fackets_out = fack_count; in tcp_sacktag_one()
1231 tp->retrans_out -= pcount; in tcp_sacktag_one()
1245 struct tcp_sock *tp = tcp_sk(sk); in tcp_shifted_skb() local
1262 if (skb == tp->lost_skb_hint) in tcp_shifted_skb()
1263 tp->lost_cnt_hint += pcount; in tcp_shifted_skb()
1295 if (skb == tp->retransmit_skb_hint) in tcp_shifted_skb()
1296 tp->retransmit_skb_hint = prev; in tcp_shifted_skb()
1297 if (skb == tp->lost_skb_hint) { in tcp_shifted_skb()
1298 tp->lost_skb_hint = prev; in tcp_shifted_skb()
1299 tp->lost_cnt_hint -= tcp_skb_pcount(prev); in tcp_shifted_skb()
1339 struct tcp_sock *tp = tcp_sk(sk); in tcp_shift_skb_data() local
1356 if (!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una)) in tcp_shift_skb_data()
1433 if (!after(TCP_SKB_CB(skb)->seq + len, tp->snd_una)) in tcp_shift_skb_data()
1478 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_walk() local
1537 tcp_highest_sack_seq(tp))) in tcp_sacktag_walk()
1584 static int tcp_sack_cache_ok(const struct tcp_sock *tp, const struct tcp_sack_block *cache) in tcp_sack_cache_ok() argument
1586 return cache < tp->recv_sack_cache + ARRAY_SIZE(tp->recv_sack_cache); in tcp_sack_cache_ok()
1593 struct tcp_sock *tp = tcp_sk(sk); in tcp_sacktag_write_queue() local
1607 state->reord = tp->packets_out; in tcp_sacktag_write_queue()
1609 if (!tp->sacked_out) { in tcp_sacktag_write_queue()
1610 if (WARN_ON(tp->fackets_out)) in tcp_sacktag_write_queue()
1611 tp->fackets_out = 0; in tcp_sacktag_write_queue()
1624 if (before(TCP_SKB_CB(ack_skb)->ack_seq, prior_snd_una - tp->max_window)) in tcp_sacktag_write_queue()
1627 if (!tp->packets_out) in tcp_sacktag_write_queue()
1638 if (!tcp_is_sackblock_valid(tp, dup_sack, in tcp_sacktag_write_queue()
1644 if (!tp->undo_marker) in tcp_sacktag_write_queue()
1650 if ((TCP_SKB_CB(ack_skb)->ack_seq != tp->snd_una) && in tcp_sacktag_write_queue()
1651 !after(sp[used_sacks].end_seq, tp->snd_una)) in tcp_sacktag_write_queue()
1686 if (!tp->sacked_out) { in tcp_sacktag_write_queue()
1688 cache = tp->recv_sack_cache + ARRAY_SIZE(tp->recv_sack_cache); in tcp_sacktag_write_queue()
1690 cache = tp->recv_sack_cache; in tcp_sacktag_write_queue()
1692 while (tcp_sack_cache_ok(tp, cache) && !cache->start_seq && in tcp_sacktag_write_queue()
1707 while (tcp_sack_cache_ok(tp, cache) && in tcp_sacktag_write_queue()
1712 if (tcp_sack_cache_ok(tp, cache) && !dup_sack && in tcp_sacktag_write_queue()
1735 if (tcp_highest_sack_seq(tp) == cache->end_seq) { in tcp_sacktag_write_queue()
1740 state->fack_count = tp->fackets_out; in tcp_sacktag_write_queue()
1751 if (!before(start_seq, tcp_highest_sack_seq(tp))) { in tcp_sacktag_write_queue()
1755 state->fack_count = tp->fackets_out; in tcp_sacktag_write_queue()
1768 for (i = 0; i < ARRAY_SIZE(tp->recv_sack_cache) - used_sacks; i++) { in tcp_sacktag_write_queue()
1769 tp->recv_sack_cache[i].start_seq = 0; in tcp_sacktag_write_queue()
1770 tp->recv_sack_cache[i].end_seq = 0; in tcp_sacktag_write_queue()
1773 tp->recv_sack_cache[i++] = sp[j]; in tcp_sacktag_write_queue()
1775 if ((state->reord < tp->fackets_out) && in tcp_sacktag_write_queue()
1776 ((inet_csk(sk)->icsk_ca_state != TCP_CA_Loss) || tp->undo_marker)) in tcp_sacktag_write_queue()
1777 tcp_update_reordering(sk, tp->fackets_out - state->reord, 0); in tcp_sacktag_write_queue()
1779 tcp_verify_left_out(tp); in tcp_sacktag_write_queue()
1783 WARN_ON((int)tp->sacked_out < 0); in tcp_sacktag_write_queue()
1784 WARN_ON((int)tp->lost_out < 0); in tcp_sacktag_write_queue()
1785 WARN_ON((int)tp->retrans_out < 0); in tcp_sacktag_write_queue()
1786 WARN_ON((int)tcp_packets_in_flight(tp) < 0); in tcp_sacktag_write_queue()
1794 static bool tcp_limit_reno_sacked(struct tcp_sock *tp) in tcp_limit_reno_sacked() argument
1798 holes = max(tp->lost_out, 1U); in tcp_limit_reno_sacked()
1799 holes = min(holes, tp->packets_out); in tcp_limit_reno_sacked()
1801 if ((tp->sacked_out + holes) > tp->packets_out) { in tcp_limit_reno_sacked()
1802 tp->sacked_out = tp->packets_out - holes; in tcp_limit_reno_sacked()
1814 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_reno_reordering() local
1815 if (tcp_limit_reno_sacked(tp)) in tcp_check_reno_reordering()
1816 tcp_update_reordering(sk, tp->packets_out + addend, 0); in tcp_check_reno_reordering()
1823 struct tcp_sock *tp = tcp_sk(sk); in tcp_add_reno_sack() local
1824 tp->sacked_out++; in tcp_add_reno_sack()
1826 tcp_verify_left_out(tp); in tcp_add_reno_sack()
1833 struct tcp_sock *tp = tcp_sk(sk); in tcp_remove_reno_sacks() local
1837 if (acked - 1 >= tp->sacked_out) in tcp_remove_reno_sacks()
1838 tp->sacked_out = 0; in tcp_remove_reno_sacks()
1840 tp->sacked_out -= acked - 1; in tcp_remove_reno_sacks()
1843 tcp_verify_left_out(tp); in tcp_remove_reno_sacks()
1846 static inline void tcp_reset_reno_sack(struct tcp_sock *tp) in tcp_reset_reno_sack() argument
1848 tp->sacked_out = 0; in tcp_reset_reno_sack()
1851 void tcp_clear_retrans(struct tcp_sock *tp) in tcp_clear_retrans() argument
1853 tp->retrans_out = 0; in tcp_clear_retrans()
1854 tp->lost_out = 0; in tcp_clear_retrans()
1855 tp->undo_marker = 0; in tcp_clear_retrans()
1856 tp->undo_retrans = -1; in tcp_clear_retrans()
1857 tp->fackets_out = 0; in tcp_clear_retrans()
1858 tp->sacked_out = 0; in tcp_clear_retrans()
1861 static inline void tcp_init_undo(struct tcp_sock *tp) in tcp_init_undo() argument
1863 tp->undo_marker = tp->snd_una; in tcp_init_undo()
1865 tp->undo_retrans = tp->retrans_out ? : -1; in tcp_init_undo()
1875 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_loss() local
1882 !after(tp->high_seq, tp->snd_una) || in tcp_enter_loss()
1884 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_enter_loss()
1885 tp->snd_ssthresh = icsk->icsk_ca_ops->ssthresh(sk); in tcp_enter_loss()
1887 tcp_init_undo(tp); in tcp_enter_loss()
1889 tp->snd_cwnd = 1; in tcp_enter_loss()
1890 tp->snd_cwnd_cnt = 0; in tcp_enter_loss()
1891 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_enter_loss()
1893 tp->retrans_out = 0; in tcp_enter_loss()
1894 tp->lost_out = 0; in tcp_enter_loss()
1896 if (tcp_is_reno(tp)) in tcp_enter_loss()
1897 tcp_reset_reno_sack(tp); in tcp_enter_loss()
1903 tp->sacked_out = 0; in tcp_enter_loss()
1904 tp->fackets_out = 0; in tcp_enter_loss()
1906 tcp_clear_all_retrans_hints(tp); in tcp_enter_loss()
1916 tp->lost_out += tcp_skb_pcount(skb); in tcp_enter_loss()
1917 tp->retransmit_high = TCP_SKB_CB(skb)->end_seq; in tcp_enter_loss()
1920 tcp_verify_left_out(tp); in tcp_enter_loss()
1926 tp->sacked_out >= sysctl_tcp_reordering) in tcp_enter_loss()
1927 tp->reordering = min_t(unsigned int, tp->reordering, in tcp_enter_loss()
1930 tp->high_seq = tp->snd_nxt; in tcp_enter_loss()
1931 tcp_ecn_queue_cwr(tp); in tcp_enter_loss()
1937 tp->frto = sysctl_tcp_frto && in tcp_enter_loss()
1955 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_sack_reneging() local
1956 unsigned long delay = max(usecs_to_jiffies(tp->srtt_us >> 4), in tcp_check_sack_reneging()
1966 static inline int tcp_fackets_out(const struct tcp_sock *tp) in tcp_fackets_out() argument
1968 return tcp_is_reno(tp) ? tp->sacked_out + 1 : tp->fackets_out; in tcp_fackets_out()
1986 static inline int tcp_dupack_heuristics(const struct tcp_sock *tp) in tcp_dupack_heuristics() argument
1988 return tcp_is_fack(tp) ? tp->fackets_out : tp->sacked_out + 1; in tcp_dupack_heuristics()
1993 struct tcp_sock *tp = tcp_sk(sk); in tcp_pause_early_retransmit() local
2001 (flag & FLAG_ECE) || !tp->srtt_us) in tcp_pause_early_retransmit()
2004 delay = max(usecs_to_jiffies(tp->srtt_us >> 5), in tcp_pause_early_retransmit()
2110 struct tcp_sock *tp = tcp_sk(sk); in tcp_time_to_recover() local
2114 if (tp->lost_out) in tcp_time_to_recover()
2118 if (tcp_dupack_heuristics(tp) > tp->reordering) in tcp_time_to_recover()
2124 packets_out = tp->packets_out; in tcp_time_to_recover()
2125 if (packets_out <= tp->reordering && in tcp_time_to_recover()
2126 tp->sacked_out >= max_t(__u32, packets_out/2, sysctl_tcp_reordering) && in tcp_time_to_recover()
2139 if ((tp->thin_dupack || sysctl_tcp_thin_dupack) && in tcp_time_to_recover()
2140 tcp_stream_is_thin(tp) && tcp_dupack_heuristics(tp) > 1 && in tcp_time_to_recover()
2141 tcp_is_sack(tp) && !tcp_send_head(sk)) in tcp_time_to_recover()
2149 if (tp->do_early_retrans && !tp->retrans_out && tp->sacked_out && in tcp_time_to_recover()
2150 (tp->packets_out >= (tp->sacked_out + 1) && tp->packets_out < 4) && in tcp_time_to_recover()
2165 struct tcp_sock *tp = tcp_sk(sk); in tcp_mark_head_lost() local
2171 const u32 loss_high = tcp_is_sack(tp) ? tp->snd_nxt : tp->high_seq; in tcp_mark_head_lost()
2173 WARN_ON(packets > tp->packets_out); in tcp_mark_head_lost()
2174 if (tp->lost_skb_hint) { in tcp_mark_head_lost()
2175 skb = tp->lost_skb_hint; in tcp_mark_head_lost()
2176 cnt = tp->lost_cnt_hint; in tcp_mark_head_lost()
2190 tp->lost_skb_hint = skb; in tcp_mark_head_lost()
2191 tp->lost_cnt_hint = cnt; in tcp_mark_head_lost()
2197 if (tcp_is_fack(tp) || tcp_is_reno(tp) || in tcp_mark_head_lost()
2202 if ((tcp_is_sack(tp) && !tcp_is_fack(tp)) || in tcp_mark_head_lost()
2215 tcp_skb_mark_lost(tp, skb); in tcp_mark_head_lost()
2220 tcp_verify_left_out(tp); in tcp_mark_head_lost()
2227 struct tcp_sock *tp = tcp_sk(sk); in tcp_update_scoreboard() local
2229 if (tcp_is_reno(tp)) { in tcp_update_scoreboard()
2231 } else if (tcp_is_fack(tp)) { in tcp_update_scoreboard()
2232 int lost = tp->fackets_out - tp->reordering; in tcp_update_scoreboard()
2237 int sacked_upto = tp->sacked_out - tp->reordering; in tcp_update_scoreboard()
2248 static inline void tcp_moderate_cwnd(struct tcp_sock *tp) in tcp_moderate_cwnd() argument
2250 tp->snd_cwnd = min(tp->snd_cwnd, in tcp_moderate_cwnd()
2251 tcp_packets_in_flight(tp) + tcp_max_burst(tp)); in tcp_moderate_cwnd()
2252 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_moderate_cwnd()
2255 static bool tcp_tsopt_ecr_before(const struct tcp_sock *tp, u32 when) in tcp_tsopt_ecr_before() argument
2257 return tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_tsopt_ecr_before()
2258 before(tp->rx_opt.rcv_tsecr, when); in tcp_tsopt_ecr_before()
2264 static bool tcp_skb_spurious_retrans(const struct tcp_sock *tp, in tcp_skb_spurious_retrans() argument
2268 tcp_tsopt_ecr_before(tp, tcp_skb_timestamp(skb)); in tcp_skb_spurious_retrans()
2274 static inline bool tcp_packet_delayed(const struct tcp_sock *tp) in tcp_packet_delayed() argument
2276 return !tp->retrans_stamp || in tcp_packet_delayed()
2277 tcp_tsopt_ecr_before(tp, tp->retrans_stamp); in tcp_packet_delayed()
2298 const struct tcp_sock *tp = tcp_sk(sk); in tcp_any_retrans_done() local
2301 if (tp->retrans_out) in tcp_any_retrans_done()
2314 struct tcp_sock *tp = tcp_sk(sk); in DBGUNDO() local
2321 tp->snd_cwnd, tcp_left_out(tp), in DBGUNDO()
2322 tp->snd_ssthresh, tp->prior_ssthresh, in DBGUNDO()
2323 tp->packets_out); in DBGUNDO()
2331 tp->snd_cwnd, tcp_left_out(tp), in DBGUNDO()
2332 tp->snd_ssthresh, tp->prior_ssthresh, in DBGUNDO()
2333 tp->packets_out); in DBGUNDO()
2343 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()
2361 tp->snd_cwnd = icsk->icsk_ca_ops->undo_cwnd(sk); in tcp_undo_cwnd_reduction()
2363 tp->snd_cwnd = max(tp->snd_cwnd, tp->snd_ssthresh << 1); in tcp_undo_cwnd_reduction()
2365 if (tp->prior_ssthresh > tp->snd_ssthresh) { in tcp_undo_cwnd_reduction()
2366 tp->snd_ssthresh = tp->prior_ssthresh; in tcp_undo_cwnd_reduction()
2367 tcp_ecn_withdraw_cwr(tp); in tcp_undo_cwnd_reduction()
2370 tp->snd_cwnd = max(tp->snd_cwnd, tp->snd_ssthresh); in tcp_undo_cwnd_reduction()
2372 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_undo_cwnd_reduction()
2373 tp->undo_marker = 0; in tcp_undo_cwnd_reduction()
2376 static inline bool tcp_may_undo(const struct tcp_sock *tp) in tcp_may_undo() argument
2378 return tp->undo_marker && (!tp->undo_retrans || tcp_packet_delayed(tp)); in tcp_may_undo()
2384 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_recovery() local
2386 if (tcp_may_undo(tp)) { in tcp_try_undo_recovery()
2401 if (tp->snd_una == tp->high_seq && tcp_is_reno(tp)) { in tcp_try_undo_recovery()
2405 tcp_moderate_cwnd(tp); in tcp_try_undo_recovery()
2407 tp->retrans_stamp = 0; in tcp_try_undo_recovery()
2417 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_dsack() local
2419 if (tp->undo_marker && !tp->undo_retrans) { 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()
2460 struct tcp_sock *tp = tcp_sk(sk); in tcp_init_cwnd_reduction() local
2462 tp->high_seq = tp->snd_nxt; in tcp_init_cwnd_reduction()
2463 tp->tlp_high_seq = 0; in tcp_init_cwnd_reduction()
2464 tp->snd_cwnd_cnt = 0; in tcp_init_cwnd_reduction()
2465 tp->prior_cwnd = tp->snd_cwnd; in tcp_init_cwnd_reduction()
2466 tp->prr_delivered = 0; in tcp_init_cwnd_reduction()
2467 tp->prr_out = 0; in tcp_init_cwnd_reduction()
2468 tp->snd_ssthresh = inet_csk(sk)->icsk_ca_ops->ssthresh(sk); in tcp_init_cwnd_reduction()
2469 tcp_ecn_queue_cwr(tp); in tcp_init_cwnd_reduction()
2475 struct tcp_sock *tp = tcp_sk(sk); in tcp_cwnd_reduction() local
2477 int delta = tp->snd_ssthresh - tcp_packets_in_flight(tp); in tcp_cwnd_reduction()
2479 (tp->packets_out - tp->sacked_out); in tcp_cwnd_reduction()
2481 if (newly_acked_sacked <= 0 || WARN_ON_ONCE(!tp->prior_cwnd)) in tcp_cwnd_reduction()
2484 tp->prr_delivered += newly_acked_sacked; in tcp_cwnd_reduction()
2486 u64 dividend = (u64)tp->snd_ssthresh * tp->prr_delivered + in tcp_cwnd_reduction()
2487 tp->prior_cwnd - 1; in tcp_cwnd_reduction()
2488 sndcnt = div_u64(dividend, tp->prior_cwnd) - tp->prr_out; in tcp_cwnd_reduction()
2492 max_t(int, tp->prr_delivered - tp->prr_out, 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
2507 (tp->undo_marker && tp->snd_ssthresh < TCP_INFINITE_SSTHRESH)) { in tcp_end_cwnd_reduction()
2508 tp->snd_cwnd = tp->snd_ssthresh; in tcp_end_cwnd_reduction()
2509 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_end_cwnd_reduction()
2517 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_cwr() local
2519 tp->prior_ssthresh = 0; in tcp_enter_cwr()
2521 tp->undo_marker = 0; in tcp_enter_cwr()
2530 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_keep_open() local
2533 if (tcp_left_out(tp) || tcp_any_retrans_done(sk)) in tcp_try_keep_open()
2538 tp->high_seq = tp->snd_nxt; in tcp_try_keep_open()
2544 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_to_open() local
2546 tcp_verify_left_out(tp); in tcp_try_to_open()
2549 tp->retrans_stamp = 0; in tcp_try_to_open()
2572 struct tcp_sock *tp = tcp_sk(sk); in tcp_mtup_probe_success() local
2576 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_mtup_probe_success()
2577 tp->snd_cwnd = tp->snd_cwnd * in tcp_mtup_probe_success()
2578 tcp_mss_to_mtu(sk, tp->mss_cache) / in tcp_mtup_probe_success()
2580 tp->snd_cwnd_cnt = 0; in tcp_mtup_probe_success()
2581 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_mtup_probe_success()
2582 tp->snd_ssthresh = tcp_current_ssthresh(sk); in tcp_mtup_probe_success()
2597 struct tcp_sock *tp = tcp_sk(sk); in tcp_simple_retransmit() local
2600 u32 prior_lost = tp->lost_out; in tcp_simple_retransmit()
2609 tp->retrans_out -= tcp_skb_pcount(skb); in tcp_simple_retransmit()
2611 tcp_skb_mark_lost_uncond_verify(tp, skb); in tcp_simple_retransmit()
2615 tcp_clear_retrans_hints_partial(tp); in tcp_simple_retransmit()
2617 if (prior_lost == tp->lost_out) in tcp_simple_retransmit()
2620 if (tcp_is_reno(tp)) in tcp_simple_retransmit()
2621 tcp_limit_reno_sacked(tp); in tcp_simple_retransmit()
2623 tcp_verify_left_out(tp); in tcp_simple_retransmit()
2631 tp->high_seq = tp->snd_nxt; in tcp_simple_retransmit()
2632 tp->snd_ssthresh = tcp_current_ssthresh(sk); in tcp_simple_retransmit()
2633 tp->prior_ssthresh = 0; in tcp_simple_retransmit()
2634 tp->undo_marker = 0; in tcp_simple_retransmit()
2643 struct tcp_sock *tp = tcp_sk(sk); in tcp_enter_recovery() local
2646 if (tcp_is_reno(tp)) in tcp_enter_recovery()
2653 tp->prior_ssthresh = 0; in tcp_enter_recovery()
2654 tcp_init_undo(tp); in tcp_enter_recovery()
2658 tp->prior_ssthresh = tcp_current_ssthresh(sk); in tcp_enter_recovery()
2669 struct tcp_sock *tp = tcp_sk(sk); in tcp_process_loss() local
2670 bool recovered = !before(tp->snd_una, tp->high_seq); in tcp_process_loss()
2676 if (tp->frto) { /* F-RTO RFC5682 sec 3.1 (sack enhanced version). */ in tcp_process_loss()
2684 if (after(tp->snd_nxt, tp->high_seq)) { in tcp_process_loss()
2686 tp->frto = 0; /* Step 3.a. loss was real */ in tcp_process_loss()
2688 tp->high_seq = tp->snd_nxt; in tcp_process_loss()
2691 if (after(tp->snd_nxt, tp->high_seq)) in tcp_process_loss()
2693 tp->frto = 0; in tcp_process_loss()
2702 if (tcp_is_reno(tp)) { in tcp_process_loss()
2706 if (after(tp->snd_nxt, tp->high_seq) && is_dupack) in tcp_process_loss()
2709 tcp_reset_reno_sack(tp); in tcp_process_loss()
2718 struct tcp_sock *tp = tcp_sk(sk); in tcp_try_undo_partial() local
2720 if (tp->undo_marker && tcp_packet_delayed(tp)) { in tcp_try_undo_partial()
2724 tcp_update_reordering(sk, tcp_fackets_out(tp) + acked, 1); in tcp_try_undo_partial()
2731 if (tp->retrans_out) { in tcp_try_undo_partial()
2737 tp->retrans_stamp = 0; in tcp_try_undo_partial()
2764 struct tcp_sock *tp = tcp_sk(sk); in tcp_fastretrans_alert() local
2766 (tcp_fackets_out(tp) > tp->reordering)); in tcp_fastretrans_alert()
2769 if (WARN_ON(!tp->packets_out && tp->sacked_out)) in tcp_fastretrans_alert()
2770 tp->sacked_out = 0; in tcp_fastretrans_alert()
2771 if (WARN_ON(!tp->sacked_out && tp->fackets_out)) in tcp_fastretrans_alert()
2772 tp->fackets_out = 0; in tcp_fastretrans_alert()
2777 tp->prior_ssthresh = 0; in tcp_fastretrans_alert()
2784 tcp_verify_left_out(tp); in tcp_fastretrans_alert()
2789 WARN_ON(tp->retrans_out != 0); in tcp_fastretrans_alert()
2790 tp->retrans_stamp = 0; in tcp_fastretrans_alert()
2791 } else if (!before(tp->snd_una, tp->high_seq)) { in tcp_fastretrans_alert()
2796 if (tp->snd_una != tp->high_seq) { in tcp_fastretrans_alert()
2803 if (tcp_is_reno(tp)) in tcp_fastretrans_alert()
2804 tcp_reset_reno_sack(tp); in tcp_fastretrans_alert()
2821 if (tcp_is_reno(tp) && is_dupack) in tcp_fastretrans_alert()
2827 do_lost = tcp_is_reno(tp) || in tcp_fastretrans_alert()
2828 tcp_fackets_out(tp) > tp->reordering; in tcp_fastretrans_alert()
2842 if (tcp_is_reno(tp)) { in tcp_fastretrans_alert()
2844 tcp_reset_reno_sack(tp); in tcp_fastretrans_alert()
2860 tp->snd_una == tp->mtu_probe.probe_seq_start) { in tcp_fastretrans_alert()
2863 tp->snd_cwnd++; in tcp_fastretrans_alert()
2943 const struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_update_rtt() local
2959 if (seq_rtt_us < 0 && tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_ack_update_rtt()
2962 tp->rx_opt.rcv_tsecr); in tcp_ack_update_rtt()
3009 struct tcp_sock *tp = tcp_sk(sk); in tcp_rearm_rto() local
3014 if (tp->fastopen_rsk) in tcp_rearm_rto()
3017 if (!tp->packets_out) { in tcp_rearm_rto()
3044 struct tcp_sock *tp = tcp_sk(sk); in tcp_resume_early_retransmit() local
3049 if (!tp->do_early_retrans) in tcp_resume_early_retransmit()
3060 struct tcp_sock *tp = tcp_sk(sk); in tcp_tso_acked() local
3063 BUG_ON(!after(TCP_SKB_CB(skb)->end_seq, tp->snd_una)); in tcp_tso_acked()
3066 if (tcp_trim_head(sk, skb, tp->snd_una - TCP_SKB_CB(skb)->seq)) in tcp_tso_acked()
3103 struct tcp_sock *tp = tcp_sk(sk); in tcp_clean_rtx_queue() local
3104 u32 prior_sacked = tp->sacked_out; in tcp_clean_rtx_queue()
3105 u32 reord = tp->packets_out; in tcp_clean_rtx_queue()
3125 if (after(scb->end_seq, tp->snd_una)) { in tcp_clean_rtx_queue()
3127 !after(tp->snd_una, scb->seq)) in tcp_clean_rtx_queue()
3143 tp->retrans_out -= acked_pcount; in tcp_clean_rtx_queue()
3152 if (!after(scb->end_seq, tp->high_seq)) in tcp_clean_rtx_queue()
3157 tp->sacked_out -= acked_pcount; in tcp_clean_rtx_queue()
3158 else if (tcp_is_sack(tp) && !tcp_skb_spurious_retrans(tp, skb)) in tcp_clean_rtx_queue()
3159 tcp_rack_advance(tp, &skb->skb_mstamp, sacked); in tcp_clean_rtx_queue()
3161 tp->lost_out -= acked_pcount; in tcp_clean_rtx_queue()
3163 tp->packets_out -= acked_pcount; in tcp_clean_rtx_queue()
3177 tp->retrans_stamp = 0; in tcp_clean_rtx_queue()
3185 if (unlikely(skb == tp->retransmit_skb_hint)) in tcp_clean_rtx_queue()
3186 tp->retransmit_skb_hint = NULL; in tcp_clean_rtx_queue()
3187 if (unlikely(skb == tp->lost_skb_hint)) in tcp_clean_rtx_queue()
3188 tp->lost_skb_hint = NULL; in tcp_clean_rtx_queue()
3191 if (likely(between(tp->snd_up, prior_snd_una, tp->snd_una))) in tcp_clean_rtx_queue()
3192 tp->snd_up = tp->snd_una; in tcp_clean_rtx_queue()
3213 !after(tp->mtu_probe.probe_seq_end, tp->snd_una))) { in tcp_clean_rtx_queue()
3217 if (tcp_is_reno(tp)) { in tcp_clean_rtx_queue()
3224 tcp_update_reordering(sk, tp->fackets_out - reord, 0); in tcp_clean_rtx_queue()
3226 delta = tcp_is_fack(tp) ? pkts_acked : in tcp_clean_rtx_queue()
3227 prior_sacked - tp->sacked_out; in tcp_clean_rtx_queue()
3228 tp->lost_cnt_hint -= min(tp->lost_cnt_hint, delta); in tcp_clean_rtx_queue()
3231 tp->fackets_out -= min(pkts_acked, tp->fackets_out); in tcp_clean_rtx_queue()
3246 WARN_ON((int)tp->sacked_out < 0); in tcp_clean_rtx_queue()
3247 WARN_ON((int)tp->lost_out < 0); in tcp_clean_rtx_queue()
3248 WARN_ON((int)tp->retrans_out < 0); in tcp_clean_rtx_queue()
3249 if (!tp->packets_out && tcp_is_sack(tp)) { in tcp_clean_rtx_queue()
3251 if (tp->lost_out) { in tcp_clean_rtx_queue()
3253 tp->lost_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3254 tp->lost_out = 0; in tcp_clean_rtx_queue()
3256 if (tp->sacked_out) { in tcp_clean_rtx_queue()
3258 tp->sacked_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3259 tp->sacked_out = 0; in tcp_clean_rtx_queue()
3261 if (tp->retrans_out) { in tcp_clean_rtx_queue()
3263 tp->retrans_out, icsk->icsk_ca_state); in tcp_clean_rtx_queue()
3264 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(tcp_send_head(sk))->end_seq, tcp_wnd_end(tp))) { in tcp_ack_probe()
3319 static inline bool tcp_may_update_window(const struct tcp_sock *tp, in tcp_may_update_window() argument
3323 return after(ack, tp->snd_una) || in tcp_may_update_window()
3324 after(ack_seq, tp->snd_wl1) || in tcp_may_update_window()
3325 (ack_seq == tp->snd_wl1 && nwin > tp->snd_wnd); in tcp_may_update_window()
3329 static void tcp_snd_una_update(struct tcp_sock *tp, u32 ack) in tcp_snd_una_update() argument
3331 u32 delta = ack - tp->snd_una; in tcp_snd_una_update()
3333 u64_stats_update_begin(&tp->syncp); in tcp_snd_una_update()
3334 tp->bytes_acked += delta; in tcp_snd_una_update()
3335 u64_stats_update_end(&tp->syncp); in tcp_snd_una_update()
3336 tp->snd_una = ack; in tcp_snd_una_update()
3340 static void tcp_rcv_nxt_update(struct tcp_sock *tp, u32 seq) in tcp_rcv_nxt_update() argument
3342 u32 delta = seq - tp->rcv_nxt; in tcp_rcv_nxt_update()
3344 u64_stats_update_begin(&tp->syncp); in tcp_rcv_nxt_update()
3345 tp->bytes_received += delta; in tcp_rcv_nxt_update()
3346 u64_stats_update_end(&tp->syncp); in tcp_rcv_nxt_update()
3347 tp->rcv_nxt = seq; in tcp_rcv_nxt_update()
3358 struct tcp_sock *tp = tcp_sk(sk); in tcp_ack_update_window() local
3363 nwin <<= tp->rx_opt.snd_wscale; in tcp_ack_update_window()
3365 if (tcp_may_update_window(tp, ack, ack_seq, nwin)) { in tcp_ack_update_window()
3367 tcp_update_wl(tp, ack_seq); in tcp_ack_update_window()
3369 if (tp->snd_wnd != nwin) { in tcp_ack_update_window()
3370 tp->snd_wnd = nwin; in tcp_ack_update_window()
3375 tp->pred_flags = 0; in tcp_ack_update_window()
3381 if (nwin > tp->max_window) { in tcp_ack_update_window()
3382 tp->max_window = nwin; in tcp_ack_update_window()
3388 tcp_snd_una_update(tp, ack); in tcp_ack_update_window()
3429 struct tcp_sock *tp = tcp_sk(sk); in tcp_send_challenge_ack() local
3435 &tp->last_oow_ack_time)) in tcp_send_challenge_ack()
3450 static void tcp_store_ts_recent(struct tcp_sock *tp) in tcp_store_ts_recent() argument
3452 tp->rx_opt.ts_recent = tp->rx_opt.rcv_tsval; in tcp_store_ts_recent()
3453 tp->rx_opt.ts_recent_stamp = get_seconds(); in tcp_store_ts_recent()
3456 static void tcp_replace_ts_recent(struct tcp_sock *tp, u32 seq) in tcp_replace_ts_recent() argument
3458 if (tp->rx_opt.saw_tstamp && !after(seq, tp->rcv_wup)) { in tcp_replace_ts_recent()
3466 if (tcp_paws_check(&tp->rx_opt, 0)) in tcp_replace_ts_recent()
3467 tcp_store_ts_recent(tp); in tcp_replace_ts_recent()
3478 struct tcp_sock *tp = tcp_sk(sk); in tcp_process_tlp_ack() local
3480 if (before(ack, tp->tlp_high_seq)) in tcp_process_tlp_ack()
3485 tp->tlp_high_seq = 0; in tcp_process_tlp_ack()
3486 } else if (after(ack, tp->tlp_high_seq)) { in tcp_process_tlp_ack()
3499 tp->tlp_high_seq = 0; in tcp_process_tlp_ack()
3515 struct tcp_sock *tp = tcp_sk(sk); in tcp_ack() local
3517 u32 prior_snd_una = tp->snd_una; in tcp_ack()
3522 int prior_packets = tp->packets_out; in tcp_ack()
3523 const int prior_unsacked = tp->packets_out - tp->sacked_out; in tcp_ack()
3536 if (before(ack, prior_snd_una - tp->max_window)) { in tcp_ack()
3546 if (after(ack, tp->snd_nxt)) in tcp_ack()
3558 prior_fackets = tp->fackets_out; in tcp_ack()
3564 tcp_replace_ts_recent(tp, TCP_SKB_CB(skb)->seq); in tcp_ack()
3571 tcp_update_wl(tp, ack_seq); in tcp_ack()
3572 tcp_snd_una_update(tp, ack); in tcp_ack()
3592 if (tcp_ecn_rcv_ecn_echo(tp, tcp_hdr(skb))) { in tcp_ack()
3608 tp->rcv_tstamp = tcp_time_stamp; in tcp_ack()
3613 acked = tp->packets_out; in tcp_ack()
3616 acked -= tp->packets_out; in tcp_ack()
3623 if (tp->tlp_high_seq) in tcp_ack()
3653 if (tp->tlp_high_seq) in tcp_ack()
3658 SOCK_DEBUG(sk, "Ack %u after %u:%u\n", ack, tp->snd_una, tp->snd_nxt); in tcp_ack()
3672 SOCK_DEBUG(sk, "Ack %u before %u:%u\n", ack, tp->snd_una, tp->snd_nxt); in tcp_ack()
3808 static bool tcp_parse_aligned_timestamp(struct tcp_sock *tp, const struct tcphdr *th) in tcp_parse_aligned_timestamp() argument
3814 tp->rx_opt.saw_tstamp = 1; in tcp_parse_aligned_timestamp()
3816 tp->rx_opt.rcv_tsval = ntohl(*ptr); in tcp_parse_aligned_timestamp()
3819 tp->rx_opt.rcv_tsecr = ntohl(*ptr) - tp->tsoffset; in tcp_parse_aligned_timestamp()
3821 tp->rx_opt.rcv_tsecr = 0; in tcp_parse_aligned_timestamp()
3831 const struct tcphdr *th, struct tcp_sock *tp) in tcp_fast_parse_options() argument
3837 tp->rx_opt.saw_tstamp = 0; in tcp_fast_parse_options()
3839 } else if (tp->rx_opt.tstamp_ok && in tcp_fast_parse_options()
3841 if (tcp_parse_aligned_timestamp(tp, th)) in tcp_fast_parse_options()
3845 tcp_parse_options(skb, &tp->rx_opt, 1, NULL); in tcp_fast_parse_options()
3846 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr) in tcp_fast_parse_options()
3847 tp->rx_opt.rcv_tsecr -= tp->tsoffset; in tcp_fast_parse_options()
3915 const struct tcp_sock *tp = tcp_sk(sk); in tcp_disordered_ack() local
3921 (th->ack && seq == TCP_SKB_CB(skb)->end_seq && seq == tp->rcv_nxt) && in tcp_disordered_ack()
3924 ack == tp->snd_una && in tcp_disordered_ack()
3927 !tcp_may_update_window(tp, ack, seq, ntohs(th->window) << tp->rx_opt.snd_wscale) && in tcp_disordered_ack()
3930 (s32)(tp->rx_opt.ts_recent - tp->rx_opt.rcv_tsval) <= (inet_csk(sk)->icsk_rto * 1024) / HZ); in tcp_disordered_ack()
3936 const struct tcp_sock *tp = tcp_sk(sk); in tcp_paws_discard() local
3938 return !tcp_paws_check(&tp->rx_opt, TCP_PAWS_WINDOW) && in tcp_paws_discard()
3955 static inline bool tcp_sequence(const struct tcp_sock *tp, u32 seq, u32 end_seq) in tcp_sequence() argument
3957 return !before(end_seq, tp->rcv_wup) && in tcp_sequence()
3958 !after(seq, tp->rcv_nxt + tcp_receive_window(tp)); in tcp_sequence()
4002 struct tcp_sock *tp = tcp_sk(sk); in tcp_fin() local
4052 __skb_queue_purge(&tp->out_of_order_queue); in tcp_fin()
4053 if (tcp_is_sack(tp)) in tcp_fin()
4054 tcp_sack_reset(&tp->rx_opt); in tcp_fin()
4084 struct tcp_sock *tp = tcp_sk(sk); in tcp_dsack_set() local
4086 if (tcp_is_sack(tp) && sysctl_tcp_dsack) { in tcp_dsack_set()
4089 if (before(seq, tp->rcv_nxt)) in tcp_dsack_set()
4096 tp->rx_opt.dsack = 1; in tcp_dsack_set()
4097 tp->duplicate_sack[0].start_seq = seq; in tcp_dsack_set()
4098 tp->duplicate_sack[0].end_seq = end_seq; in tcp_dsack_set()
4104 struct tcp_sock *tp = tcp_sk(sk); in tcp_dsack_extend() local
4106 if (!tp->rx_opt.dsack) in tcp_dsack_extend()
4109 tcp_sack_extend(tp->duplicate_sack, seq, end_seq); in tcp_dsack_extend()
4114 struct tcp_sock *tp = tcp_sk(sk); in tcp_send_dupack() local
4117 before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { in tcp_send_dupack()
4121 if (tcp_is_sack(tp) && sysctl_tcp_dsack) { in tcp_send_dupack()
4124 if (after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) in tcp_send_dupack()
4125 end_seq = tp->rcv_nxt; in tcp_send_dupack()
4136 static void tcp_sack_maybe_coalesce(struct tcp_sock *tp) in tcp_sack_maybe_coalesce() argument
4139 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_maybe_coalesce()
4145 for (this_sack = 1; this_sack < tp->rx_opt.num_sacks;) { in tcp_sack_maybe_coalesce()
4152 tp->rx_opt.num_sacks--; in tcp_sack_maybe_coalesce()
4153 for (i = this_sack; i < tp->rx_opt.num_sacks; i++) in tcp_sack_maybe_coalesce()
4163 struct tcp_sock *tp = tcp_sk(sk); in tcp_sack_new_ofo_skb() local
4164 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_new_ofo_skb()
4165 int cur_sacks = tp->rx_opt.num_sacks; in tcp_sack_new_ofo_skb()
4177 tcp_sack_maybe_coalesce(tp); in tcp_sack_new_ofo_skb()
4190 tp->rx_opt.num_sacks--; in tcp_sack_new_ofo_skb()
4200 tp->rx_opt.num_sacks++; in tcp_sack_new_ofo_skb()
4205 static void tcp_sack_remove(struct tcp_sock *tp) in tcp_sack_remove() argument
4207 struct tcp_sack_block *sp = &tp->selective_acks[0]; in tcp_sack_remove()
4208 int num_sacks = tp->rx_opt.num_sacks; in tcp_sack_remove()
4212 if (skb_queue_empty(&tp->out_of_order_queue)) { in tcp_sack_remove()
4213 tp->rx_opt.num_sacks = 0; in tcp_sack_remove()
4219 if (!before(tp->rcv_nxt, sp->start_seq)) { in tcp_sack_remove()
4223 WARN_ON(before(tp->rcv_nxt, sp->end_seq)); in tcp_sack_remove()
4227 tp->selective_acks[i-1] = tp->selective_acks[i]; in tcp_sack_remove()
4234 tp->rx_opt.num_sacks = num_sacks; in tcp_sack_remove()
4280 struct tcp_sock *tp = tcp_sk(sk); in tcp_ofo_queue() local
4281 __u32 dsack_high = tp->rcv_nxt; in tcp_ofo_queue()
4285 while ((skb = skb_peek(&tp->out_of_order_queue)) != NULL) { in tcp_ofo_queue()
4286 if (after(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) in tcp_ofo_queue()
4296 __skb_unlink(skb, &tp->out_of_order_queue); in tcp_ofo_queue()
4297 if (!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) { in tcp_ofo_queue()
4303 tp->rcv_nxt, TCP_SKB_CB(skb)->seq, in tcp_ofo_queue()
4308 tcp_rcv_nxt_update(tp, TCP_SKB_CB(skb)->end_seq); in tcp_ofo_queue()
4343 struct tcp_sock *tp = tcp_sk(sk); in tcp_data_queue_ofo() local
4347 tcp_ecn_check_ce(tp, skb); in tcp_data_queue_ofo()
4356 tp->pred_flags = 0; in tcp_data_queue_ofo()
4361 tp->rcv_nxt, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq); in tcp_data_queue_ofo()
4363 skb1 = skb_peek_tail(&tp->out_of_order_queue); in tcp_data_queue_ofo()
4366 if (tcp_is_sack(tp)) { in tcp_data_queue_ofo()
4367 tp->rx_opt.num_sacks = 1; in tcp_data_queue_ofo()
4368 tp->selective_acks[0].start_seq = TCP_SKB_CB(skb)->seq; in tcp_data_queue_ofo()
4369 tp->selective_acks[0].end_seq = in tcp_data_queue_ofo()
4372 __skb_queue_head(&tp->out_of_order_queue, skb); in tcp_data_queue_ofo()
4383 __skb_queue_after(&tp->out_of_order_queue, skb1, skb); in tcp_data_queue_ofo()
4390 if (!tp->rx_opt.num_sacks || in tcp_data_queue_ofo()
4391 tp->selective_acks[0].end_seq != seq) in tcp_data_queue_ofo()
4395 tp->selective_acks[0].end_seq = end_seq; in tcp_data_queue_ofo()
4403 if (skb_queue_is_first(&tp->out_of_order_queue, skb1)) { in tcp_data_queue_ofo()
4407 skb1 = skb_queue_prev(&tp->out_of_order_queue, skb1); in tcp_data_queue_ofo()
4425 if (skb_queue_is_first(&tp->out_of_order_queue, in tcp_data_queue_ofo()
4430 &tp->out_of_order_queue, in tcp_data_queue_ofo()
4435 __skb_queue_head(&tp->out_of_order_queue, skb); in tcp_data_queue_ofo()
4437 __skb_queue_after(&tp->out_of_order_queue, skb1, skb); in tcp_data_queue_ofo()
4440 while (!skb_queue_is_last(&tp->out_of_order_queue, skb)) { in tcp_data_queue_ofo()
4441 skb1 = skb_queue_next(&tp->out_of_order_queue, skb); in tcp_data_queue_ofo()
4450 __skb_unlink(skb1, &tp->out_of_order_queue); in tcp_data_queue_ofo()
4458 if (tcp_is_sack(tp)) in tcp_data_queue_ofo()
4536 struct tcp_sock *tp = tcp_sk(sk); in tcp_data_queue() local
4546 tcp_ecn_accept_cwr(tp, skb); in tcp_data_queue()
4548 tp->rx_opt.dsack = 0; in tcp_data_queue()
4554 if (TCP_SKB_CB(skb)->seq == tp->rcv_nxt) { in tcp_data_queue()
4555 if (tcp_receive_window(tp) == 0) in tcp_data_queue()
4559 if (tp->ucopy.task == current && in tcp_data_queue()
4560 tp->copied_seq == tp->rcv_nxt && tp->ucopy.len && in tcp_data_queue()
4561 sock_owned_by_user(sk) && !tp->urg_data) { in tcp_data_queue()
4563 tp->ucopy.len); in tcp_data_queue()
4568 if (!skb_copy_datagram_msg(skb, 0, tp->ucopy.msg, chunk)) { in tcp_data_queue()
4569 tp->ucopy.len -= chunk; in tcp_data_queue()
4570 tp->copied_seq += chunk; in tcp_data_queue()
4587 tcp_rcv_nxt_update(tp, TCP_SKB_CB(skb)->end_seq); in tcp_data_queue()
4593 if (!skb_queue_empty(&tp->out_of_order_queue)) { in tcp_data_queue()
4599 if (skb_queue_empty(&tp->out_of_order_queue)) in tcp_data_queue()
4603 if (tp->rx_opt.num_sacks) in tcp_data_queue()
4604 tcp_sack_remove(tp); in tcp_data_queue()
4615 if (!after(TCP_SKB_CB(skb)->end_seq, tp->rcv_nxt)) { in tcp_data_queue()
4629 if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt + tcp_receive_window(tp))) in tcp_data_queue()
4634 if (before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) { in tcp_data_queue()
4637 tp->rcv_nxt, TCP_SKB_CB(skb)->seq, in tcp_data_queue()
4640 tcp_dsack_set(sk, TCP_SKB_CB(skb)->seq, tp->rcv_nxt); in tcp_data_queue()
4645 if (!tcp_receive_window(tp)) in tcp_data_queue()
4771 struct tcp_sock *tp = tcp_sk(sk); in tcp_collapse_ofo_queue() local
4772 struct sk_buff *skb = skb_peek(&tp->out_of_order_queue); in tcp_collapse_ofo_queue()
4786 if (!skb_queue_is_last(&tp->out_of_order_queue, skb)) in tcp_collapse_ofo_queue()
4787 next = skb_queue_next(&tp->out_of_order_queue, skb); in tcp_collapse_ofo_queue()
4795 tcp_collapse(sk, &tp->out_of_order_queue, in tcp_collapse_ofo_queue()
4818 struct tcp_sock *tp = tcp_sk(sk); in tcp_prune_ofo_queue() local
4821 if (!skb_queue_empty(&tp->out_of_order_queue)) { in tcp_prune_ofo_queue()
4823 __skb_queue_purge(&tp->out_of_order_queue); in tcp_prune_ofo_queue()
4830 if (tp->rx_opt.sack_ok) in tcp_prune_ofo_queue()
4831 tcp_sack_reset(&tp->rx_opt); in tcp_prune_ofo_queue()
4847 struct tcp_sock *tp = tcp_sk(sk); in tcp_prune_queue() local
4849 SOCK_DEBUG(sk, "prune_queue: c=%x\n", tp->copied_seq); in tcp_prune_queue()
4856 tp->rcv_ssthresh = min(tp->rcv_ssthresh, 4U * tp->advmss); in tcp_prune_queue()
4863 tp->copied_seq, tp->rcv_nxt); in tcp_prune_queue()
4884 tp->pred_flags = 0; in tcp_prune_queue()
4890 const struct tcp_sock *tp = tcp_sk(sk); in tcp_should_expand_sndbuf() local
4907 if (tcp_packets_in_flight(tp) >= tp->snd_cwnd) in tcp_should_expand_sndbuf()
4921 struct tcp_sock *tp = tcp_sk(sk); in tcp_new_space() local
4925 tp->snd_cwnd_stamp = tcp_time_stamp; in tcp_new_space()
4954 struct tcp_sock *tp = tcp_sk(sk); in __tcp_ack_snd_check() local
4957 if (((tp->rcv_nxt - tp->rcv_wup) > inet_csk(sk)->icsk_ack.rcv_mss && in __tcp_ack_snd_check()
4961 __tcp_select_window(sk) >= tp->rcv_wnd) || in __tcp_ack_snd_check()
4965 (ofo_possible && skb_peek(&tp->out_of_order_queue))) { in __tcp_ack_snd_check()
4995 struct tcp_sock *tp = tcp_sk(sk); in tcp_check_urg() local
5003 if (after(tp->copied_seq, ptr)) in tcp_check_urg()
5016 if (before(ptr, tp->rcv_nxt)) in tcp_check_urg()
5020 if (tp->urg_data && !after(ptr, tp->urg_seq)) in tcp_check_urg()
5041 if (tp->urg_seq == tp->copied_seq && tp->urg_data && in tcp_check_urg()
5042 !sock_flag(sk, SOCK_URGINLINE) && tp->copied_seq != tp->rcv_nxt) { in tcp_check_urg()
5044 tp->copied_seq++; in tcp_check_urg()
5045 if (skb && !before(tp->copied_seq, TCP_SKB_CB(skb)->end_seq)) { in tcp_check_urg()
5051 tp->urg_data = TCP_URG_NOTYET; in tcp_check_urg()
5052 tp->urg_seq = ptr; in tcp_check_urg()
5055 tp->pred_flags = 0; in tcp_check_urg()
5061 struct tcp_sock *tp = tcp_sk(sk); in tcp_urg() local
5068 if (tp->urg_data == TCP_URG_NOTYET) { in tcp_urg()
5069 u32 ptr = tp->urg_seq - ntohl(th->seq) + (th->doff * 4) - in tcp_urg()
5077 tp->urg_data = TCP_URG_VALID | tmp; in tcp_urg()
5086 struct tcp_sock *tp = tcp_sk(sk); in tcp_copy_to_iovec() local
5092 err = skb_copy_datagram_msg(skb, hlen, tp->ucopy.msg, chunk); in tcp_copy_to_iovec()
5094 err = skb_copy_and_csum_datagram_msg(skb, hlen, tp->ucopy.msg); in tcp_copy_to_iovec()
5097 tp->ucopy.len -= chunk; in tcp_copy_to_iovec()
5098 tp->copied_seq += chunk; in tcp_copy_to_iovec()
5134 struct tcp_sock *tp = tcp_sk(sk); in tcp_validate_incoming() local
5137 if (tcp_fast_parse_options(skb, th, tp) && tp->rx_opt.saw_tstamp && in tcp_validate_incoming()
5143 &tp->last_oow_ack_time)) in tcp_validate_incoming()
5151 if (!tcp_sequence(tp, TCP_SKB_CB(skb)->seq, TCP_SKB_CB(skb)->end_seq)) { in tcp_validate_incoming()
5163 &tp->last_oow_ack_time)) in tcp_validate_incoming()
5177 if (TCP_SKB_CB(skb)->seq == tp->rcv_nxt) in tcp_validate_incoming()
5231 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_established() local
5250 tp->rx_opt.saw_tstamp = 0; in tcp_rcv_established()
5261 if ((tcp_flag_word(th) & TCP_HP_BITS) == tp->pred_flags && in tcp_rcv_established()
5262 TCP_SKB_CB(skb)->seq == tp->rcv_nxt && in tcp_rcv_established()
5263 !after(TCP_SKB_CB(skb)->ack_seq, tp->snd_nxt)) { in tcp_rcv_established()
5264 int tcp_header_len = tp->tcp_header_len; in tcp_rcv_established()
5274 if (!tcp_parse_aligned_timestamp(tp, th)) in tcp_rcv_established()
5278 if ((s32)(tp->rx_opt.rcv_tsval - tp->rx_opt.ts_recent) < 0) in tcp_rcv_established()
5297 tp->rcv_nxt == tp->rcv_wup) in tcp_rcv_established()
5298 tcp_store_ts_recent(tp); in tcp_rcv_established()
5315 if (tp->ucopy.task == current && in tcp_rcv_established()
5316 tp->copied_seq == tp->rcv_nxt && in tcp_rcv_established()
5317 len - tcp_header_len <= tp->ucopy.len && in tcp_rcv_established()
5329 tp->rcv_nxt == tp->rcv_wup) in tcp_rcv_established()
5330 tcp_store_ts_recent(tp); in tcp_rcv_established()
5335 tcp_rcv_nxt_update(tp, TCP_SKB_CB(skb)->end_seq); in tcp_rcv_established()
5353 tp->rcv_nxt == tp->rcv_wup) in tcp_rcv_established()
5354 tcp_store_ts_recent(tp); in tcp_rcv_established()
5367 if (TCP_SKB_CB(skb)->ack_seq != tp->snd_una) { in tcp_rcv_established()
5425 struct tcp_sock *tp = tcp_sk(sk); in tcp_finish_connect() local
5445 tp->lsndtime = tcp_time_stamp; in tcp_finish_connect()
5450 inet_csk_reset_keepalive_timer(sk, keepalive_time_when(tp)); in tcp_finish_connect()
5452 if (!tp->rx_opt.snd_wscale) in tcp_finish_connect()
5453 __tcp_fast_path_on(tp, tp->snd_wnd); in tcp_finish_connect()
5455 tp->pred_flags = 0; in tcp_finish_connect()
5466 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_fastopen_synack() local
5467 struct sk_buff *data = tp->syn_data ? tcp_write_queue_head(sk) : NULL; in tcp_rcv_fastopen_synack()
5468 u16 mss = tp->rx_opt.mss_clamp, try_exp = 0; in tcp_rcv_fastopen_synack()
5471 if (mss == tp->rx_opt.user_mss) { in tcp_rcv_fastopen_synack()
5481 if (!tp->syn_fastopen) { in tcp_rcv_fastopen_synack()
5484 } else if (tp->total_retrans) { in tcp_rcv_fastopen_synack()
5491 } else if (cookie->len < 0 && !tp->syn_data) { in tcp_rcv_fastopen_synack()
5496 try_exp = tp->syn_fastopen_exp ? 2 : 1; in tcp_rcv_fastopen_synack()
5511 tp->syn_data_acked = tp->syn_data; in tcp_rcv_fastopen_synack()
5512 if (tp->syn_data_acked) in tcp_rcv_fastopen_synack()
5521 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_synsent_state_process() local
5523 int saved_clamp = tp->rx_opt.mss_clamp; in tcp_rcv_synsent_state_process()
5525 tcp_parse_options(skb, &tp->rx_opt, 0, &foc); in tcp_rcv_synsent_state_process()
5526 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr) in tcp_rcv_synsent_state_process()
5527 tp->rx_opt.rcv_tsecr -= tp->tsoffset; in tcp_rcv_synsent_state_process()
5538 if (!after(TCP_SKB_CB(skb)->ack_seq, tp->snd_una) || in tcp_rcv_synsent_state_process()
5539 after(TCP_SKB_CB(skb)->ack_seq, tp->snd_nxt)) in tcp_rcv_synsent_state_process()
5542 if (tp->rx_opt.saw_tstamp && tp->rx_opt.rcv_tsecr && in tcp_rcv_synsent_state_process()
5543 !between(tp->rx_opt.rcv_tsecr, tp->retrans_stamp, in tcp_rcv_synsent_state_process()
5579 tcp_ecn_rcv_synack(tp, th); in tcp_rcv_synsent_state_process()
5581 tcp_init_wl(tp, TCP_SKB_CB(skb)->seq); in tcp_rcv_synsent_state_process()
5587 tp->rcv_nxt = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
5588 tp->rcv_wup = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
5593 tp->snd_wnd = ntohs(th->window); in tcp_rcv_synsent_state_process()
5595 if (!tp->rx_opt.wscale_ok) { in tcp_rcv_synsent_state_process()
5596 tp->rx_opt.snd_wscale = tp->rx_opt.rcv_wscale = 0; in tcp_rcv_synsent_state_process()
5597 tp->window_clamp = min(tp->window_clamp, 65535U); in tcp_rcv_synsent_state_process()
5600 if (tp->rx_opt.saw_tstamp) { in tcp_rcv_synsent_state_process()
5601 tp->rx_opt.tstamp_ok = 1; in tcp_rcv_synsent_state_process()
5602 tp->tcp_header_len = in tcp_rcv_synsent_state_process()
5604 tp->advmss -= TCPOLEN_TSTAMP_ALIGNED; in tcp_rcv_synsent_state_process()
5605 tcp_store_ts_recent(tp); in tcp_rcv_synsent_state_process()
5607 tp->tcp_header_len = sizeof(struct tcphdr); in tcp_rcv_synsent_state_process()
5610 if (tcp_is_sack(tp) && sysctl_tcp_fack) in tcp_rcv_synsent_state_process()
5611 tcp_enable_fack(tp); in tcp_rcv_synsent_state_process()
5620 tp->copied_seq = tp->rcv_nxt; in tcp_rcv_synsent_state_process()
5626 if ((tp->syn_fastopen || tp->syn_data) && in tcp_rcv_synsent_state_process()
5668 if (tp->rx_opt.ts_recent_stamp && tp->rx_opt.saw_tstamp && in tcp_rcv_synsent_state_process()
5669 tcp_paws_reject(&tp->rx_opt, 0)) in tcp_rcv_synsent_state_process()
5679 if (tp->rx_opt.saw_tstamp) { in tcp_rcv_synsent_state_process()
5680 tp->rx_opt.tstamp_ok = 1; in tcp_rcv_synsent_state_process()
5681 tcp_store_ts_recent(tp); in tcp_rcv_synsent_state_process()
5682 tp->tcp_header_len = in tcp_rcv_synsent_state_process()
5685 tp->tcp_header_len = sizeof(struct tcphdr); in tcp_rcv_synsent_state_process()
5688 tp->rcv_nxt = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
5689 tp->copied_seq = tp->rcv_nxt; in tcp_rcv_synsent_state_process()
5690 tp->rcv_wup = TCP_SKB_CB(skb)->seq + 1; in tcp_rcv_synsent_state_process()
5695 tp->snd_wnd = ntohs(th->window); in tcp_rcv_synsent_state_process()
5696 tp->snd_wl1 = TCP_SKB_CB(skb)->seq; in tcp_rcv_synsent_state_process()
5697 tp->max_window = tp->snd_wnd; in tcp_rcv_synsent_state_process()
5699 tcp_ecn_rcv_syn(tp, th); in tcp_rcv_synsent_state_process()
5728 tcp_clear_options(&tp->rx_opt); in tcp_rcv_synsent_state_process()
5729 tp->rx_opt.mss_clamp = saved_clamp; in tcp_rcv_synsent_state_process()
5733 tcp_clear_options(&tp->rx_opt); in tcp_rcv_synsent_state_process()
5734 tp->rx_opt.mss_clamp = saved_clamp; in tcp_rcv_synsent_state_process()
5747 struct tcp_sock *tp = tcp_sk(sk); in tcp_rcv_state_process() local
5754 tp->rx_opt.saw_tstamp = 0; in tcp_rcv_state_process()
5807 req = tp->fastopen_rsk; in tcp_rcv_state_process()
5831 if (!tp->srtt_us) in tcp_rcv_state_process()
5838 tp->total_retrans = req->num_retrans; in tcp_rcv_state_process()
5846 tp->copied_seq = tp->rcv_nxt; in tcp_rcv_state_process()
5860 tp->snd_una = TCP_SKB_CB(skb)->ack_seq; in tcp_rcv_state_process()
5861 tp->snd_wnd = ntohs(th->window) << tp->rx_opt.snd_wscale; in tcp_rcv_state_process()
5862 tcp_init_wl(tp, TCP_SKB_CB(skb)->seq); in tcp_rcv_state_process()
5864 if (tp->rx_opt.tstamp_ok) in tcp_rcv_state_process()
5865 tp->advmss -= TCPOLEN_TSTAMP_ALIGNED; in tcp_rcv_state_process()
5883 tp->lsndtime = tcp_time_stamp; in tcp_rcv_state_process()
5886 tcp_fast_path_on(tp); in tcp_rcv_state_process()
5911 if (tp->snd_una != tp->write_seq) in tcp_rcv_state_process()
5927 if (tp->linger2 < 0 || in tcp_rcv_state_process()
5929 after(TCP_SKB_CB(skb)->end_seq - th->fin, tp->rcv_nxt))) { in tcp_rcv_state_process()
5954 if (tp->snd_una == tp->write_seq) { in tcp_rcv_state_process()
5961 if (tp->snd_una == tp->write_seq) { in tcp_rcv_state_process()
5977 if (!before(TCP_SKB_CB(skb)->seq, tp->rcv_nxt)) in tcp_rcv_state_process()
5987 after(TCP_SKB_CB(skb)->end_seq - th->fin, tp->rcv_nxt)) { in tcp_rcv_state_process()
6163 struct tcp_sock *tp = tcp_sk(sk); in tcp_conn_request() local
6200 tmp_opt.user_mss = tp->rx_opt.user_mss; in tcp_conn_request()