112 	int reuse = sock_net(sk)->ipv4.sysctl_tcp_tw_reuse;  in tcp_twsk_unique()
209 	struct inet_timewait_death_row *tcp_death_row = &sock_net(sk)->ipv4.tcp_death_row;  in tcp_v4_connect()
795 	ctl_sk = this_cpu_read(*net->ipv4.tcp_sk);  in tcp_v4_send_reset()
893 	ctl_sk = this_cpu_read(*net->ipv4.tcp_sk);  in tcp_v4_send_ack()
986 		tos = sock_net(sk)->ipv4.sysctl_tcp_reflect_tos ?  in tcp_v4_send_synack()
1548 	if (sock_net(sk)->ipv4.sysctl_tcp_reflect_tos)  in tcp_v4_syn_recv_sock()
2793 	.sysctl_wmem_offset	= offsetof(struct net, ipv4.sysctl_tcp_wmem),
2794 	.sysctl_rmem_offset	= offsetof(struct net, ipv4.sysctl_tcp_rmem),
2810 	if (net->ipv4.tcp_congestion_control)  in tcp_sk_exit()
2811 		bpf_module_put(net->ipv4.tcp_congestion_control,  in tcp_sk_exit()
2812 			       net->ipv4.tcp_congestion_control->owner);  in tcp_sk_exit()
2815 		inet_ctl_sock_destroy(*per_cpu_ptr(net->ipv4.tcp_sk, cpu));  in tcp_sk_exit()
2816 	free_percpu(net->ipv4.tcp_sk);  in tcp_sk_exit()
2823 	net->ipv4.tcp_sk = alloc_percpu(struct sock *);  in tcp_sk_init()
2824 	if (!net->ipv4.tcp_sk)  in tcp_sk_init()
2841 		*per_cpu_ptr(net->ipv4.tcp_sk, cpu) = sk;  in tcp_sk_init()
2844 	net->ipv4.sysctl_tcp_ecn = 2;  in tcp_sk_init()
2845 	net->ipv4.sysctl_tcp_ecn_fallback = 1;  in tcp_sk_init()
2847 	net->ipv4.sysctl_tcp_base_mss = TCP_BASE_MSS;  in tcp_sk_init()
2848 	net->ipv4.sysctl_tcp_min_snd_mss = TCP_MIN_SND_MSS;  in tcp_sk_init()
2849 	net->ipv4.sysctl_tcp_probe_threshold = TCP_PROBE_THRESHOLD;  in tcp_sk_init()
2850 	net->ipv4.sysctl_tcp_probe_interval = TCP_PROBE_INTERVAL;  in tcp_sk_init()
2851 	net->ipv4.sysctl_tcp_mtu_probe_floor = TCP_MIN_SND_MSS;  in tcp_sk_init()
2853 	net->ipv4.sysctl_tcp_keepalive_time = TCP_KEEPALIVE_TIME;  in tcp_sk_init()
2854 	net->ipv4.sysctl_tcp_keepalive_probes = TCP_KEEPALIVE_PROBES;  in tcp_sk_init()
2855 	net->ipv4.sysctl_tcp_keepalive_intvl = TCP_KEEPALIVE_INTVL;  in tcp_sk_init()
2857 	net->ipv4.sysctl_tcp_syn_retries = TCP_SYN_RETRIES;  in tcp_sk_init()
2858 	net->ipv4.sysctl_tcp_synack_retries = TCP_SYNACK_RETRIES;  in tcp_sk_init()
2859 	net->ipv4.sysctl_tcp_syncookies = 1;  in tcp_sk_init()
2860 	net->ipv4.sysctl_tcp_reordering = TCP_FASTRETRANS_THRESH;  in tcp_sk_init()
2861 	net->ipv4.sysctl_tcp_retries1 = TCP_RETR1;  in tcp_sk_init()
2862 	net->ipv4.sysctl_tcp_retries2 = TCP_RETR2;  in tcp_sk_init()
2863 	net->ipv4.sysctl_tcp_orphan_retries = 0;  in tcp_sk_init()
2864 	net->ipv4.sysctl_tcp_fin_timeout = TCP_FIN_TIMEOUT;  in tcp_sk_init()
2865 	net->ipv4.sysctl_tcp_notsent_lowat = UINT_MAX;  in tcp_sk_init()
2866 	net->ipv4.sysctl_tcp_tw_reuse = 2;  in tcp_sk_init()
2867 	net->ipv4.sysctl_tcp_no_ssthresh_metrics_save = 1;  in tcp_sk_init()
2870 	net->ipv4.tcp_death_row.sysctl_max_tw_buckets = cnt / 2;  in tcp_sk_init()
2871 	net->ipv4.tcp_death_row.hashinfo = &tcp_hashinfo;  in tcp_sk_init()
2873 	net->ipv4.sysctl_max_syn_backlog = max(128, cnt / 128);  in tcp_sk_init()
2874 	net->ipv4.sysctl_tcp_sack = 1;  in tcp_sk_init()
2875 	net->ipv4.sysctl_tcp_window_scaling = 1;  in tcp_sk_init()
2876 	net->ipv4.sysctl_tcp_timestamps = 1;  in tcp_sk_init()
2877 	net->ipv4.sysctl_tcp_early_retrans = 3;  in tcp_sk_init()
2878 	net->ipv4.sysctl_tcp_recovery = TCP_RACK_LOSS_DETECTION;  in tcp_sk_init()
2879 	net->ipv4.sysctl_tcp_slow_start_after_idle = 1; /* By default, RFC2861 behavior.  */  in tcp_sk_init()
2880 	net->ipv4.sysctl_tcp_retrans_collapse = 1;  in tcp_sk_init()
2881 	net->ipv4.sysctl_tcp_max_reordering = 300;  in tcp_sk_init()
2882 	net->ipv4.sysctl_tcp_dsack = 1;  in tcp_sk_init()
2883 	net->ipv4.sysctl_tcp_app_win = 31;  in tcp_sk_init()
2884 	net->ipv4.sysctl_tcp_adv_win_scale = 1;  in tcp_sk_init()
2885 	net->ipv4.sysctl_tcp_frto = 2;  in tcp_sk_init()
2886 	net->ipv4.sysctl_tcp_moderate_rcvbuf = 1;  in tcp_sk_init()
2891 	net->ipv4.sysctl_tcp_tso_win_divisor = 3;  in tcp_sk_init()
2893 	net->ipv4.sysctl_tcp_limit_output_bytes = 16 * 65536;  in tcp_sk_init()
2895 	net->ipv4.sysctl_tcp_challenge_ack_limit = 1000;  in tcp_sk_init()
2896 	net->ipv4.sysctl_tcp_min_tso_segs = 2;  in tcp_sk_init()
2897 	net->ipv4.sysctl_tcp_min_rtt_wlen = 300;  in tcp_sk_init()
2898 	net->ipv4.sysctl_tcp_autocorking = 1;  in tcp_sk_init()
2899 	net->ipv4.sysctl_tcp_invalid_ratelimit = HZ/2;  in tcp_sk_init()
2900 	net->ipv4.sysctl_tcp_pacing_ss_ratio = 200;  in tcp_sk_init()
2901 	net->ipv4.sysctl_tcp_pacing_ca_ratio = 120;  in tcp_sk_init()
2903 		memcpy(net->ipv4.sysctl_tcp_rmem,  in tcp_sk_init()
2904 		       init_net.ipv4.sysctl_tcp_rmem,  in tcp_sk_init()
2905 		       sizeof(init_net.ipv4.sysctl_tcp_rmem));  in tcp_sk_init()
2906 		memcpy(net->ipv4.sysctl_tcp_wmem,  in tcp_sk_init()
2907 		       init_net.ipv4.sysctl_tcp_wmem,  in tcp_sk_init()
2908 		       sizeof(init_net.ipv4.sysctl_tcp_wmem));  in tcp_sk_init()
2910 	net->ipv4.sysctl_tcp_comp_sack_delay_ns = NSEC_PER_MSEC;  in tcp_sk_init()
2911 	net->ipv4.sysctl_tcp_comp_sack_slack_ns = 100 * NSEC_PER_USEC;  in tcp_sk_init()
2912 	net->ipv4.sysctl_tcp_comp_sack_nr = 44;  in tcp_sk_init()
2913 	net->ipv4.sysctl_tcp_fastopen = TFO_CLIENT_ENABLE;  in tcp_sk_init()
2914 	spin_lock_init(&net->ipv4.tcp_fastopen_ctx_lock);  in tcp_sk_init()
2915 	net->ipv4.sysctl_tcp_fastopen_blackhole_timeout = 60 * 60;  in tcp_sk_init()
2916 	atomic_set(&net->ipv4.tfo_active_disable_times, 0);  in tcp_sk_init()
2920 	    bpf_try_module_get(init_net.ipv4.tcp_congestion_control,  in tcp_sk_init()
2921 			       init_net.ipv4.tcp_congestion_control->owner))  in tcp_sk_init()
2922 		net->ipv4.tcp_congestion_control = init_net.ipv4.tcp_congestion_control;  in tcp_sk_init()
2924 		net->ipv4.tcp_congestion_control = &tcp_reno;  in tcp_sk_init()