54 void tcp_time_wait(struct sock *sk, int state, int timeo);
262 static inline bool tcp_under_memory_pressure(const struct sock *sk)  in tcp_under_memory_pressure()
287 static inline bool tcp_out_of_memory(struct sock *sk)  in tcp_out_of_memory()
295 static inline void tcp_wmem_free_skb(struct sock *sk, struct sk_buff *skb)  in tcp_wmem_free_skb()
305 void sk_forced_mem_schedule(struct sock *sk, int size);
307 bool tcp_check_oom(struct sock *sk, int shift);
321 void tcp_shutdown(struct sock *sk, int how);
326 void tcp_remove_empty_skb(struct sock *sk);
328 int tcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
329 int tcp_sendmsg_locked(struct sock *sk, struct msghdr *msg, size_t size);
330 int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, int *copied,
332 int tcp_sendpage(struct sock *sk, struct page *page, int offset, size_t size,
334 int tcp_sendpage_locked(struct sock *sk, struct page *page, int offset,
336 ssize_t do_tcp_sendpages(struct sock *sk, struct page *page, int offset,
338 int tcp_send_mss(struct sock *sk, int *size_goal, int flags);
339 void tcp_push(struct sock *sk, int flags, int mss_now, int nonagle,
341 void tcp_release_cb(struct sock *sk);
343 void tcp_write_timer_handler(struct sock *sk);
344 void tcp_delack_timer_handler(struct sock *sk);
345 int tcp_ioctl(struct sock *sk, int cmd, unsigned long arg);
346 int tcp_rcv_state_process(struct sock *sk, struct sk_buff *skb);
347 void tcp_rcv_established(struct sock *sk, struct sk_buff *skb);
348 void tcp_rcv_space_adjust(struct sock *sk);
349 int tcp_twsk_unique(struct sock *sk, struct sock *sktw, void *twp);
350 void tcp_twsk_destructor(struct sock *sk);
355 struct sk_buff *tcp_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp,
358 void tcp_enter_quickack_mode(struct sock *sk, unsigned int max_quickacks);
359 static inline void tcp_dec_quickack_mode(struct sock *sk,  in tcp_dec_quickack_mode()
390 struct sock *tcp_check_req(struct sock *sk, struct sk_buff *skb,
393 int tcp_child_process(struct sock *parent, struct sock *child,
395 void tcp_enter_loss(struct sock *sk);
396 void tcp_cwnd_reduction(struct sock *sk, int newly_acked_sacked, int newly_lost, int flag);
398 void tcp_update_metrics(struct sock *sk);
399 void tcp_init_metrics(struct sock *sk);
402 void __tcp_close(struct sock *sk, long timeout);
403 void tcp_close(struct sock *sk, long timeout);
404 void tcp_init_sock(struct sock *sk);
405 void tcp_init_transfer(struct sock *sk, int bpf_op, struct sk_buff *skb);
406 __poll_t tcp_poll(struct file *file, struct socket *sock,
408 int do_tcp_getsockopt(struct sock *sk, int level,
410 int tcp_getsockopt(struct sock *sk, int level, int optname,
413 int do_tcp_setsockopt(struct sock *sk, int level, int optname,
415 int tcp_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
417 void tcp_set_keepalive(struct sock *sk, int val);
419 int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
421 int tcp_set_rcvlowat(struct sock *sk, int val);
422 int tcp_set_window_clamp(struct sock *sk, int val);
425 void tcp_recv_timestamp(struct msghdr *msg, const struct sock *sk,
427 void tcp_data_ready(struct sock *sk);
429 int tcp_mmap(struct file *file, struct socket *sock,
440 u16 tcp_v4_get_syncookie(struct sock *sk, struct iphdr *iph,
442 u16 tcp_v6_get_syncookie(struct sock *sk, struct ipv6hdr *iph,
447 			  struct sock *sk, struct tcphdr *th);
452 void tcp_v4_send_check(struct sock *sk, struct sk_buff *skb);
453 void tcp_v4_mtu_reduced(struct sock *sk);
454 void tcp_req_err(struct sock *sk, u32 seq, bool abort);
455 void tcp_ld_RTO_revert(struct sock *sk, u32 seq);
456 int tcp_v4_conn_request(struct sock *sk, struct sk_buff *skb);
457 struct sock *tcp_create_openreq_child(const struct sock *sk,
460 void tcp_ca_openreq_child(struct sock *sk, const struct dst_entry *dst);
461 struct sock *tcp_v4_syn_recv_sock(const struct sock *sk, struct sk_buff *skb,
466 int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb);
467 int tcp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
468 int tcp_connect(struct sock *sk);
474 struct sk_buff *tcp_make_synack(const struct sock *sk, struct dst_entry *dst,
479 int tcp_disconnect(struct sock *sk, int flags);
481 void tcp_finish_connect(struct sock *sk, struct sk_buff *skb);
482 int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size);
483 void inet_sk_rx_dst_set(struct sock *sk, const struct sk_buff *skb);
486 struct sock *tcp_get_cookie_sock(struct sock *sk, struct sk_buff *skb,
491 struct sock *cookie_v4_check(struct sock *sk, struct sk_buff *skb);
494 					    struct sock *sk, struct sk_buff *skb);
512 static inline void tcp_synq_overflow(const struct sock *sk)  in tcp_synq_overflow()
536 static inline bool tcp_synq_no_recent_overflow(const struct sock *sk)  in tcp_synq_no_recent_overflow()
586 struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb);
594 void tcp_skb_entail(struct sock *sk, struct sk_buff *skb);
596 void __tcp_push_pending_frames(struct sock *sk, unsigned int cur_mss,
598 int __tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb, int segs);
599 int tcp_retransmit_skb(struct sock *sk, struct sk_buff *skb, int segs);
600 void tcp_retransmit_timer(struct sock *sk);
601 void tcp_xmit_retransmit_queue(struct sock *);
602 void tcp_simple_retransmit(struct sock *);
603 void tcp_enter_recovery(struct sock *sk, bool ece_ack);
604 int tcp_trim_head(struct sock *, struct sk_buff *, u32);
609 int tcp_fragment(struct sock *sk, enum tcp_queue tcp_queue,
613 void tcp_send_probe0(struct sock *);
614 void tcp_send_partial(struct sock *);
615 int tcp_write_wakeup(struct sock *, int mib);
616 void tcp_send_fin(struct sock *sk);
617 void tcp_send_active_reset(struct sock *sk, gfp_t priority);
618 int tcp_send_synack(struct sock *);
619 void tcp_push_one(struct sock *, unsigned int mss_now);
620 void __tcp_send_ack(struct sock *sk, u32 rcv_nxt);
621 void tcp_send_ack(struct sock *sk);
622 void tcp_send_delayed_ack(struct sock *sk);
623 void tcp_send_loss_probe(struct sock *sk);
624 bool tcp_schedule_loss_probe(struct sock *sk, bool advancing_rto);
629 void tcp_rearm_rto(struct sock *sk);
630 void tcp_synack_rtt_meas(struct sock *sk, struct request_sock *req);
631 void tcp_reset(struct sock *sk, struct sk_buff *skb);
633 void tcp_fin(struct sock *sk);
634 void tcp_check_space(struct sock *sk);
637 void tcp_init_xmit_timers(struct sock *);
638 static inline void tcp_clear_xmit_timers(struct sock *sk)  in tcp_clear_xmit_timers()
649 unsigned int tcp_sync_mss(struct sock *sk, u32 pmtu);
650 unsigned int tcp_current_mss(struct sock *sk);
651 u32 tcp_clamp_probe0_to_user_timeout(const struct sock *sk, u32 when);
677 void tcp_get_info(struct sock *, struct tcp_info *);
680 int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
682 int tcp_read_skb(struct sock *sk, skb_read_actor_t recv_actor);
683 struct sk_buff *tcp_recv_skb(struct sock *sk, u32 seq, u32 *off);
684 void tcp_read_done(struct sock *sk, size_t len);
686 void tcp_initialize_rcv_mss(struct sock *sk);
688 int tcp_mtu_to_mss(struct sock *sk, int pmtu);
689 int tcp_mss_to_mtu(struct sock *sk, int mss);
690 void tcp_mtup_init(struct sock *sk);
692 static inline void tcp_bound_rto(const struct sock *sk)  in tcp_bound_rto()
706 	if (sk_is_mptcp((struct sock *)tp))  in __tcp_fast_path_on()
719 static inline void tcp_fast_path_check(struct sock *sk)  in tcp_fast_path_check()
731 static inline u32 tcp_rto_min(struct sock *sk)  in tcp_rto_min()
741 static inline u32 tcp_rto_min_us(struct sock *sk)  in tcp_rto_min_us()
774 u32 __tcp_select_window(struct sock *sk);
776 void tcp_send_window_probe(struct sock *sk);
946 INDIRECT_CALLABLE_DECLARE(void tcp_v6_send_check(struct sock *sk, struct sk_buff *skb));
1070 	u32 (*ssthresh)(struct sock *sk);
1073 	void (*cong_avoid)(struct sock *sk, u32 ack, u32 acked);
1076 	void (*set_state)(struct sock *sk, u8 new_state);
1079 	void (*cwnd_event)(struct sock *sk, enum tcp_ca_event ev);
1082 	void (*in_ack_event)(struct sock *sk, u32 flags);
1085 	void (*pkts_acked)(struct sock *sk, const struct ack_sample *sample);
1088 	u32 (*min_tso_segs)(struct sock *sk);
1093 	void (*cong_control)(struct sock *sk, const struct rate_sample *rs);
1097 	u32  (*undo_cwnd)(struct sock *sk);
1099 	u32 (*sndbuf_expand)(struct sock *sk);
1103 	size_t (*get_info)(struct sock *sk, u32 ext, int *attr,
1113 	void (*init)(struct sock *sk);
1115 	void (*release)(struct sock *sk);
1121 void tcp_assign_congestion_control(struct sock *sk);
1122 void tcp_init_congestion_control(struct sock *sk);
1123 void tcp_cleanup_congestion_control(struct sock *sk);
1129 int tcp_set_congestion_control(struct sock *sk, const char *name, bool load,
1134 u32 tcp_reno_ssthresh(struct sock *sk);
1135 u32 tcp_reno_undo_cwnd(struct sock *sk);
1136 void tcp_reno_cong_avoid(struct sock *sk, u32 ack, u32 acked);
1151 static inline bool tcp_ca_needs_ecn(const struct sock *sk)  in tcp_ca_needs_ecn()
1158 static inline void tcp_ca_event(struct sock *sk, const enum tcp_ca_event event)  in tcp_ca_event()
1167 void tcp_set_ca_state(struct sock *sk, const u8 ca_state);
1170 void tcp_rate_skb_sent(struct sock *sk, struct sk_buff *skb);
1171 void tcp_rate_skb_delivered(struct sock *sk, struct sk_buff *skb,
1173 void tcp_rate_gen(struct sock *sk, u32 delivered, u32 lost,
1175 void tcp_rate_check_app_limited(struct sock *sk);
1246 static inline bool tcp_in_cwnd_reduction(const struct sock *sk)  in tcp_in_cwnd_reduction()
1256 static inline __u32 tcp_current_ssthresh(const struct sock *sk)  in tcp_current_ssthresh()
1271 void tcp_enter_cwr(struct sock *sk);
1301 static inline bool tcp_is_cwnd_limited(const struct sock *sk)  in tcp_is_cwnd_limited()
1321 static inline bool tcp_needs_internal_pacing(const struct sock *sk)  in tcp_needs_internal_pacing()
1329 static inline unsigned long tcp_pacing_delay(const struct sock *sk)  in tcp_pacing_delay()
1336 static inline void tcp_reset_xmit_timer(struct sock *sk,  in tcp_reset_xmit_timer()
1351 static inline unsigned long tcp_probe0_base(const struct sock *sk)  in tcp_probe0_base()
1357 static inline unsigned long tcp_probe0_when(const struct sock *sk,  in tcp_probe0_when()
1367 static inline void tcp_check_probe_timer(struct sock *sk)  in tcp_check_probe_timer()
1399 bool tcp_add_backlog(struct sock *sk, struct sk_buff *skb,
1403 int tcp_filter(struct sock *sk, struct sk_buff *skb);
1404 void tcp_set_state(struct sock *sk, int state);
1405 void tcp_done(struct sock *sk);
1406 int tcp_abort(struct sock *sk, int err);
1414 void tcp_cwnd_restart(struct sock *sk, s32 delta);
1416 static inline void tcp_slow_start_after_idle_check(struct sock *sk)  in tcp_slow_start_after_idle_check()
1431 void tcp_select_initial_window(const struct sock *sk, int __space,
1436 static inline int tcp_win_from_space(const struct sock *sk, int space)  in tcp_win_from_space()
1446 static inline int tcp_space(const struct sock *sk)  in tcp_space()
1453 static inline int tcp_full_space(const struct sock *sk)  in tcp_full_space()
1458 static inline void tcp_adjust_rcv_ssthresh(struct sock *sk)  in tcp_adjust_rcv_ssthresh()
1469 void tcp_cleanup_rbuf(struct sock *sk, int copied);
1476 static inline bool tcp_rmem_pressure(const struct sock *sk)  in tcp_rmem_pressure()
1489 static inline bool tcp_epollin_ready(const struct sock *sk, int target)  in tcp_epollin_ready()
1502 				  const struct sock *sk_listener,
1505 void tcp_enter_memory_pressure(struct sock *sk);
1506 void tcp_leave_memory_pressure(struct sock *sk);
1510 	struct net *net = sock_net((struct sock *)tp);  in keepalive_intvl_when()
1518 	struct net *net = sock_net((struct sock *)tp);  in keepalive_time_when()
1526 	struct net *net = sock_net((struct sock *)tp);  in keepalive_probes()
1540 static inline int tcp_fin_time(const struct sock *sk)  in tcp_fin_time()
1675 			const struct sock *sk, const struct sk_buff *skb);
1676 int tcp_md5_do_add(struct sock *sk, const union tcp_md5_addr *addr,
1679 int tcp_md5_do_del(struct sock *sk, const union tcp_md5_addr *addr,
1681 struct tcp_md5sig_key *tcp_v4_md5_lookup(const struct sock *sk,
1682 					 const struct sock *addr_sk);
1687 struct tcp_md5sig_key *__tcp_md5_do_lookup(const struct sock *sk, int l3index,
1691 tcp_md5_do_lookup(const struct sock *sk, int l3index,  in tcp_md5_do_lookup()
1700 tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb,
1708 tcp_md5_do_lookup(const struct sock *sk, int l3index,  in tcp_md5_do_lookup()
1715 tcp_inbound_md5_hash(const struct sock *sk, const struct sk_buff *skb,  in tcp_inbound_md5_hash()
1738 void tcp_fastopen_cache_get(struct sock *sk, u16 *mss,
1740 void tcp_fastopen_cache_set(struct sock *sk, u16 mss,
1752 void tcp_fastopen_destroy_cipher(struct sock *sk);
1754 int tcp_fastopen_reset_cipher(struct net *net, struct sock *sk,
1758 void tcp_fastopen_add_skb(struct sock *sk, struct sk_buff *skb);
1759 struct sock *tcp_try_fastopen(struct sock *sk, struct sk_buff *skb,
1764 bool tcp_fastopen_cookie_check(struct sock *sk, u16 *mss,
1766 bool tcp_fastopen_defer_connect(struct sock *sk, int *err);
1779 void tcp_fastopen_active_disable(struct sock *sk);
1780 bool tcp_fastopen_active_should_disable(struct sock *sk);
1781 void tcp_fastopen_active_disable_ofo_check(struct sock *sk);
1782 void tcp_fastopen_active_detect_blackhole(struct sock *sk, bool expired);
1786 struct tcp_fastopen_context *tcp_fastopen_get_ctx(const struct sock *sk)  in tcp_fastopen_get_ctx()
1824 void tcp_chrono_start(struct sock *sk, const enum tcp_chrono type);
1825 void tcp_chrono_stop(struct sock *sk, const enum tcp_chrono type);
1844 void tcp_write_queue_purge(struct sock *sk);
1846 static inline struct sk_buff *tcp_rtx_queue_head(const struct sock *sk)  in tcp_rtx_queue_head()
1851 static inline struct sk_buff *tcp_rtx_queue_tail(const struct sock *sk)  in tcp_rtx_queue_tail()
1856 static inline struct sk_buff *tcp_write_queue_tail(const struct sock *sk)  in tcp_write_queue_tail()
1864 static inline struct sk_buff *tcp_send_head(const struct sock *sk)  in tcp_send_head()
1869 static inline bool tcp_skb_is_last(const struct sock *sk,  in tcp_skb_is_last()
1882 static inline bool tcp_write_queue_empty(const struct sock *sk)  in tcp_write_queue_empty()
1889 static inline bool tcp_rtx_queue_empty(const struct sock *sk)  in tcp_rtx_queue_empty()
1894 static inline bool tcp_rtx_and_write_queues_empty(const struct sock *sk)  in tcp_rtx_and_write_queues_empty()
1899 static inline void tcp_add_write_queue_tail(struct sock *sk, struct sk_buff *skb)  in tcp_add_write_queue_tail()
1911 						  struct sock *sk)  in tcp_insert_write_queue_before()
1916 static inline void tcp_unlink_write_queue(struct sk_buff *skb, struct sock *sk)  in tcp_unlink_write_queue()
1924 static inline void tcp_rtx_queue_unlink(struct sk_buff *skb, struct sock *sk)  in tcp_rtx_queue_unlink()
1930 static inline void tcp_rtx_queue_unlink_and_free(struct sk_buff *skb, struct sock *sk)  in tcp_rtx_queue_unlink_and_free()
1937 static inline void tcp_push_pending_frames(struct sock *sk)  in tcp_push_pending_frames()
1961 static inline void tcp_advance_highest_sack(struct sock *sk, struct sk_buff *skb)  in tcp_advance_highest_sack()
1966 static inline struct sk_buff *tcp_highest_sack(struct sock *sk)  in tcp_highest_sack()
1971 static inline void tcp_highest_sack_reset(struct sock *sk)  in tcp_highest_sack_reset()
1977 static inline void tcp_highest_sack_replace(struct sock *sk,  in tcp_highest_sack_replace()
1986 static inline bool inet_sk_transparent(const struct sock *sk)  in inet_sk_transparent()
2022 	struct sock		*syn_wait_sk;
2030 void tcp_v4_destroy_sock(struct sock *sk);
2045 	struct net *net = sock_net((struct sock *)tp);  in tcp_notsent_lowat()
2049 bool tcp_stream_memory_free(const struct sock *sk, int wake);
2056 int tcp_rtx_synack(const struct sock *sk, struct request_sock *req);
2059 		     struct sock *sk, struct sk_buff *skb);
2064 	struct tcp_md5sig_key	*(*md5_lookup) (const struct sock *sk,
2065 						const struct sock *addr_sk);
2068 					 const struct sock *sk,
2070 	int		(*md5_parse)(struct sock *sk,
2080 	struct tcp_md5sig_key *(*req_md5_lookup)(const struct sock *sk,
2081 						 const struct sock *addr_sk);
2084 					  const struct sock *sk,
2091 	struct dst_entry *(*route_req)(const struct sock *sk,
2097 	int (*send_synack)(const struct sock *sk, struct dst_entry *dst,
2111 					 const struct sock *sk, struct sk_buff *skb,  in cookie_init_sequence()
2120 					 const struct sock *sk, struct sk_buff *skb,  in cookie_init_sequence()
2133 void tcp_mark_skb_lost(struct sock *sk, struct sk_buff *skb);
2134 void tcp_newreno_mark_lost(struct sock *sk, bool snd_una_advanced);
2137 extern bool tcp_rack_mark_lost(struct sock *sk);
2140 extern void tcp_rack_reo_timeout(struct sock *sk);
2141 extern void tcp_rack_update_reo_wnd(struct sock *sk, struct rate_sample *rs);
2144 static inline s64 tcp_rto_delta_us(const struct sock *sk)  in tcp_rto_delta_us()
2189 static inline int tcp_inq(struct sock *sk)  in tcp_inq()
2213 int tcp_peek_len(struct socket *sock);
2236 static inline void tcp_listendrop(const struct sock *sk)  in tcp_listendrop()
2238 	atomic_inc(&((struct sock *)sk)->sk_drops);  in tcp_listendrop()
2256 	int (*init)(struct sock *sk);
2258 	void (*update)(struct sock *sk, struct proto *p,
2259 		       void (*write_space)(struct sock *sk));
2261 	void (*release)(struct sock *sk);
2263 	int (*get_info)(const struct sock *sk, struct sk_buff *skb);
2264 	size_t (*get_info_size)(const struct sock *sk);
2266 	void (*clone)(const struct request_sock *req, struct sock *newsk,
2274 int tcp_set_ulp(struct sock *sk, const char *name);
2276 void tcp_cleanup_ulp(struct sock *sk);
2277 void tcp_update_ulp(struct sock *sk, struct proto *p,
2278 		    void (*write_space)(struct sock *sk));
2289 struct proto *tcp_bpf_get_proto(struct sock *sk, struct sk_psock *psock);
2290 int tcp_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
2291 void tcp_bpf_clone(const struct sock *sk, struct sock *newsk);
2294 int tcp_bpf_sendmsg_redir(struct sock *sk, bool ingress,
2299 static inline void tcp_bpf_clone(const struct sock *sk, struct sock *newsk)  in tcp_bpf_clone()
2326 static inline int tcp_call_bpf(struct sock *sk, int op, u32 nargs, u32 *args)  in tcp_call_bpf()
2350 static inline int tcp_call_bpf_2arg(struct sock *sk, int op, u32 arg1, u32 arg2)  in tcp_call_bpf_2arg()
2357 static inline int tcp_call_bpf_3arg(struct sock *sk, int op, u32 arg1, u32 arg2,  in tcp_call_bpf_3arg()
2366 static inline int tcp_call_bpf(struct sock *sk, int op, u32 nargs, u32 *args)  in tcp_call_bpf()
2371 static inline int tcp_call_bpf_2arg(struct sock *sk, int op, u32 arg1, u32 arg2)  in tcp_call_bpf_2arg()
2376 static inline int tcp_call_bpf_3arg(struct sock *sk, int op, u32 arg1, u32 arg2,  in tcp_call_bpf_3arg()
2384 static inline u32 tcp_timeout_init(struct sock *sk)  in tcp_timeout_init()
2395 static inline u32 tcp_rwnd_init_bpf(struct sock *sk)  in tcp_rwnd_init_bpf()
2406 static inline bool tcp_bpf_ca_needs_ecn(struct sock *sk)  in tcp_bpf_ca_needs_ecn()
2411 static inline void tcp_bpf_rtt(struct sock *sk)  in tcp_bpf_rtt()
2423 			     void (*cad)(struct sock *sk, u32 ack_seq));
2439 static inline u64 tcp_transmit_time(const struct sock *sk)  in tcp_transmit_time()