| .. SPDX-License-Identifier: GPL-2.0 |
| .. Copyright (C) 2023 Google LLC |
| |
| ========================================= |
| tcp_sock struct fast path usage breakdown |
| ========================================= |
| |
| Type Name fastpath_tx_access fastpath_rx_access Comments |
| ..struct ..tcp_sock |
| struct_inet_connection_sock inet_conn |
| u16 tcp_header_len read_mostly read_mostly tcp_bound_to_half_wnd,tcp_current_mss(tx);tcp_rcv_established(rx) |
| u16 gso_segs read_mostly - tcp_xmit_size_goal |
| __be32 pred_flags read_write read_mostly tcp_select_window(tx);tcp_rcv_established(rx) |
| u64 bytes_received - read_write tcp_rcv_nxt_update(rx) |
| u32 segs_in - read_write tcp_v6_rcv(rx) |
| u32 data_segs_in - read_write tcp_v6_rcv(rx) |
| u32 rcv_nxt read_mostly read_write tcp_cleanup_rbuf,tcp_send_ack,tcp_inq_hint,tcp_transmit_skb,tcp_receive_window(tx);tcp_v6_do_rcv,tcp_rcv_established,tcp_data_queue,tcp_receive_window,tcp_rcv_nxt_update(write)(rx) |
| u32 copied_seq - read_mostly tcp_cleanup_rbuf,tcp_rcv_space_adjust,tcp_inq_hint |
| u32 rcv_wup - read_write __tcp_cleanup_rbuf,tcp_receive_window,tcp_receive_established |
| u32 snd_nxt read_write read_mostly tcp_rate_check_app_limited,__tcp_transmit_skb,tcp_event_new_data_sent(write)(tx);tcp_rcv_established,tcp_ack,tcp_clean_rtx_queue(rx) |
| u32 segs_out read_write - __tcp_transmit_skb |
| u32 data_segs_out read_write - __tcp_transmit_skb,tcp_update_skb_after_send |
| u64 bytes_sent read_write - __tcp_transmit_skb |
| u64 bytes_acked - read_write tcp_snd_una_update/tcp_ack |
| u32 dsack_dups |
| u32 snd_una read_mostly read_write tcp_wnd_end,tcp_urg_mode,tcp_minshall_check,tcp_cwnd_validate(tx);tcp_ack,tcp_may_update_window,tcp_clean_rtx_queue(write),tcp_ack_tstamp(rx) |
| u32 snd_sml read_write - tcp_minshall_check,tcp_minshall_update |
| u32 rcv_tstamp - read_mostly tcp_ack |
| u32 lsndtime read_write - tcp_slow_start_after_idle_check,tcp_event_data_sent |
| u32 last_oow_ack_time |
| u32 compressed_ack_rcv_nxt |
| u32 tsoffset read_mostly read_mostly tcp_established_options(tx);tcp_fast_parse_options(rx) |
| struct_list_head tsq_node - - |
| struct_list_head tsorted_sent_queue read_write - tcp_update_skb_after_send |
| u32 snd_wl1 - read_mostly tcp_may_update_window |
| u32 snd_wnd read_mostly read_mostly tcp_wnd_end,tcp_tso_should_defer(tx);tcp_fast_path_on(rx) |
| u32 max_window read_mostly - tcp_bound_to_half_wnd,forced_push |
| u32 mss_cache read_mostly read_mostly tcp_rate_check_app_limited,tcp_current_mss,tcp_sync_mss,tcp_sndbuf_expand,tcp_tso_should_defer(tx);tcp_update_pacing_rate,tcp_clean_rtx_queue(rx) |
| u32 window_clamp read_mostly read_write tcp_rcv_space_adjust,__tcp_select_window |
| u32 rcv_ssthresh read_mostly - __tcp_select_window |
| u8 scaling_ratio read_mostly read_mostly tcp_win_from_space |
| struct tcp_rack |
| u16 advmss - read_mostly tcp_rcv_space_adjust |
| u8 compressed_ack |
| u8:2 dup_ack_counter |
| u8:1 tlp_retrans |
| u8:1 tcp_usec_ts read_mostly read_mostly |
| u32 chrono_start read_write - tcp_chrono_start/stop(tcp_write_xmit,tcp_cwnd_validate,tcp_send_syn_data) |
| u32[3] chrono_stat read_write - tcp_chrono_start/stop(tcp_write_xmit,tcp_cwnd_validate,tcp_send_syn_data) |
| u8:2 chrono_type read_write - tcp_chrono_start/stop(tcp_write_xmit,tcp_cwnd_validate,tcp_send_syn_data) |
| u8:1 rate_app_limited - read_write tcp_rate_gen |
| u8:1 fastopen_connect |
| u8:1 fastopen_no_cookie |
| u8:1 is_sack_reneg - read_mostly tcp_skb_entail,tcp_ack |
| u8:2 fastopen_client_fail |
| u8:4 nonagle read_write - tcp_skb_entail,tcp_push_pending_frames |
| u8:1 thin_lto |
| u8:1 recvmsg_inq |
| u8:1 repair read_mostly - tcp_write_xmit |
| u8:1 frto |
| u8 repair_queue - - |
| u8:2 save_syn |
| u8:1 syn_data |
| u8:1 syn_fastopen |
| u8:1 syn_fastopen_exp |
| u8:1 syn_fastopen_ch |
| u8:1 syn_data_acked |
| u8:1 is_cwnd_limited read_mostly - tcp_cwnd_validate,tcp_is_cwnd_limited |
| u32 tlp_high_seq - read_mostly tcp_ack |
| u32 tcp_tx_delay |
| u64 tcp_wstamp_ns read_write - tcp_pacing_check,tcp_tso_should_defer,tcp_update_skb_after_send |
| u64 tcp_clock_cache read_write read_write tcp_mstamp_refresh(tcp_write_xmit/tcp_rcv_space_adjust),__tcp_transmit_skb,tcp_tso_should_defer;timer |
| u64 tcp_mstamp read_write read_write tcp_mstamp_refresh(tcp_write_xmit/tcp_rcv_space_adjust)(tx);tcp_rcv_space_adjust,tcp_rate_gen,tcp_clean_rtx_queue,tcp_ack_update_rtt/tcp_time_stamp(rx);timer |
| u32 srtt_us read_mostly read_write tcp_tso_should_defer(tx);tcp_update_pacing_rate,__tcp_set_rto,tcp_rtt_estimator(rx) |
| u32 mdev_us read_write - tcp_rtt_estimator |
| u32 mdev_max_us |
| u32 rttvar_us - read_mostly __tcp_set_rto |
| u32 rtt_seq read_write tcp_rtt_estimator |
| struct_minmax rtt_min - read_mostly tcp_min_rtt/tcp_rate_gen,tcp_min_rtttcp_update_rtt_min |
| u32 packets_out read_write read_write tcp_packets_in_flight(tx/rx);tcp_slow_start_after_idle_check,tcp_nagle_check,tcp_rate_skb_sent,tcp_event_new_data_sent,tcp_cwnd_validate,tcp_write_xmit(tx);tcp_ack,tcp_clean_rtx_queue,tcp_update_pacing_rate(rx) |
| u32 retrans_out - read_mostly tcp_packets_in_flight,tcp_rate_check_app_limited |
| u32 max_packets_out - read_write tcp_cwnd_validate |
| u32 cwnd_usage_seq - read_write tcp_cwnd_validate |
| u16 urg_data - read_mostly tcp_fast_path_check |
| u8 ecn_flags read_write - tcp_ecn_send |
| u8 keepalive_probes |
| u32 reordering read_mostly - tcp_sndbuf_expand |
| u32 reord_seen |
| u32 snd_up read_write read_mostly tcp_mark_urg,tcp_urg_mode,__tcp_transmit_skb(tx);tcp_clean_rtx_queue(rx) |
| struct_tcp_options_received rx_opt read_mostly read_write tcp_established_options(tx);tcp_fast_path_on,tcp_ack_update_window,tcp_is_sack,tcp_data_queue,tcp_rcv_established,tcp_ack_update_rtt(rx) |
| u32 snd_ssthresh - read_mostly tcp_update_pacing_rate |
| u32 snd_cwnd read_mostly read_mostly tcp_snd_cwnd,tcp_rate_check_app_limited,tcp_tso_should_defer(tx);tcp_update_pacing_rate |
| u32 snd_cwnd_cnt |
| u32 snd_cwnd_clamp |
| u32 snd_cwnd_used |
| u32 snd_cwnd_stamp |
| u32 prior_cwnd |
| u32 prr_delivered |
| u32 prr_out read_mostly read_mostly tcp_rate_skb_sent,tcp_newly_delivered(tx);tcp_ack,tcp_rate_gen,tcp_clean_rtx_queue(rx) |
| u32 delivered read_mostly read_write tcp_rate_skb_sent, tcp_newly_delivered(tx);tcp_ack, tcp_rate_gen, tcp_clean_rtx_queue (rx) |
| u32 delivered_ce read_mostly read_write tcp_rate_skb_sent(tx);tcp_rate_gen(rx) |
| u32 lost - read_mostly tcp_ack |
| u32 app_limited read_write read_mostly tcp_rate_check_app_limited,tcp_rate_skb_sent(tx);tcp_rate_gen(rx) |
| u64 first_tx_mstamp read_write - tcp_rate_skb_sent |
| u64 delivered_mstamp read_write - tcp_rate_skb_sent |
| u32 rate_delivered - read_mostly tcp_rate_gen |
| u32 rate_interval_us - read_mostly rate_delivered,rate_app_limited |
| u32 rcv_wnd read_write read_mostly tcp_select_window,tcp_receive_window,tcp_fast_path_check |
| u32 write_seq read_write - tcp_rate_check_app_limited,tcp_write_queue_empty,tcp_skb_entail,forced_push,tcp_mark_push |
| u32 notsent_lowat read_mostly - tcp_stream_memory_free |
| u32 pushed_seq read_write - tcp_mark_push,forced_push |
| u32 lost_out read_mostly read_mostly tcp_left_out(tx);tcp_packets_in_flight(tx/rx);tcp_rate_check_app_limited(rx) |
| u32 sacked_out read_mostly read_mostly tcp_left_out(tx);tcp_packets_in_flight(tx/rx);tcp_clean_rtx_queue(rx) |
| struct_hrtimer pacing_timer |
| struct_hrtimer compressed_ack_timer |
| struct_sk_buff* lost_skb_hint read_mostly tcp_clean_rtx_queue |
| struct_sk_buff* retransmit_skb_hint read_mostly - tcp_clean_rtx_queue |
| struct_rb_root out_of_order_queue - read_mostly tcp_data_queue,tcp_fast_path_check |
| struct_sk_buff* ooo_last_skb |
| struct_tcp_sack_block[1] duplicate_sack |
| struct_tcp_sack_block[4] selective_acks |
| struct_tcp_sack_block[4] recv_sack_cache |
| struct_sk_buff* highest_sack read_write - tcp_event_new_data_sent |
| int lost_cnt_hint |
| u32 prior_ssthresh |
| u32 high_seq |
| u32 retrans_stamp |
| u32 undo_marker |
| int undo_retrans |
| u64 bytes_retrans |
| u32 total_retrans |
| u32 rto_stamp |
| u16 total_rto |
| u16 total_rto_recoveries |
| u32 total_rto_time |
| u32 urg_seq - - |
| unsigned_int keepalive_time |
| unsigned_int keepalive_intvl |
| int linger2 |
| u8 bpf_sock_ops_cb_flags |
| u8:1 bpf_chg_cc_inprogress |
| u16 timeout_rehash |
| u32 rcv_ooopack |
| u32 rcv_rtt_last_tsecr |
| struct rcv_rtt_est - read_write tcp_rcv_space_adjust,tcp_rcv_established |
| struct rcvq_space - read_write tcp_rcv_space_adjust |
| struct mtu_probe |
| u32 plb_rehash |
| u32 mtu_info |
| bool is_mptcp |
| bool smc_hs_congested |
| bool syn_smc |
| struct_tcp_sock_af_ops* af_specific |
| struct_tcp_md5sig_info* md5sig_info |
| struct_tcp_fastopen_request* fastopen_req |
| struct_request_sock* fastopen_rsk |
| struct_saved_syn* saved_syn |
