192 struct tcp_sock {  struct
202 	__cacheline_group_begin(tcp_sock_read_tx);  argument
211 	__cacheline_group_end(tcp_sock_read_tx);  argument
229 	__cacheline_group_end(tcp_sock_read_txrx);  argument
247 	__cacheline_group_end(tcp_sock_read_rx);  argument
251 	u32	segs_out;	/* RFC4898 tcpEStatsPerfSegsOut
276 	__cacheline_group_end(tcp_sock_write_tx);  argument
304 	__cacheline_group_end(tcp_sock_write_txrx);  argument
308 	u64	bytes_received;
313 	u32	segs_in;	/* RFC4898 tcpEStatsPerfSegsIn
316 	u32	data_segs_in;	/* RFC4898 tcpEStatsPerfDataSegsIn
342 	__cacheline_group_end(tcp_sock_write_rx);  argument
350 	u32	dsack_dups;	/* RFC4898 tcpEStatsStackDSACKDups
353 	u32	compressed_ack_rcv_nxt;
354 	struct list_head tsq_node; /* anchor in tsq_tasklet.head list */
357 	struct tcp_rack {
367 	} rack;
368 	u8	compressed_ack;
369 	u8	dup_ack_counter:2,
370 		tlp_retrans:1,	/* TLP is a retransmission */
371 		unused:5;
372 	u8	thin_lto    : 1,/* Use linear timeouts for thin streams */
373 		fastopen_connect:1, /* FASTOPEN_CONNECT sockopt */
374 		fastopen_no_cookie:1, /* Allow send/recv SYN+data without a cookie */
375 		fastopen_client_fail:2, /* reason why fastopen failed */
376 		frto        : 1;/* F-RTO (RFC5682) activated in CA_Loss */
377 	u8	repair_queue;
378 	u8	save_syn:2,	/* Save headers of SYN packet */
379 		syn_data:1,	/* SYN includes data */
380 		syn_fastopen:1,	/* SYN includes Fast Open option */
381 		syn_fastopen_exp:1,/* SYN includes Fast Open exp. option */
382 		syn_fastopen_ch:1, /* Active TFO re-enabling probe */
383 		syn_data_acked:1;/* data in SYN is acked by SYN-ACK */
385 	u8	keepalive_probes; /* num of allowed keep alive probes	*/
386 	u32	tcp_tx_delay;	/* delay (in usec) added to TX packets */
389 	u32	mdev_max_us;	/* maximal mdev for the last rtt period	*/
391 	u32	reord_seen;	/* number of data packet reordering events */
396 	u32	snd_cwnd_cnt;	/* Linear increase counter		*/
397 	u32	snd_cwnd_clamp; /* Do not allow snd_cwnd to grow above this */
398 	u32	snd_cwnd_used;
399 	u32	snd_cwnd_stamp;
400 	u32	prior_cwnd;	/* cwnd right before starting loss recovery */
401 	u32	prr_delivered;	/* Number of newly delivered packets to
403 	u32	last_oow_ack_time;  /* timestamp of last out-of-window ACK */
405 	struct hrtimer	pacing_timer;
406 	struct hrtimer	compressed_ack_timer;
408 	struct sk_buff	*ooo_last_skb; /* cache rb_last(out_of_order_queue) */
411 	struct tcp_sack_block duplicate_sack[1]; /* D-SACK block */
412 	struct tcp_sack_block selective_acks[4]; /* The SACKS themselves*/
414 	struct tcp_sack_block recv_sack_cache[4];
416 	int     lost_cnt_hint;
418 	u32	prior_ssthresh; /* ssthresh saved at recovery start	*/
419 	u32	high_seq;	/* snd_nxt at onset of congestion	*/
421 	u32	retrans_stamp;	/* Timestamp of the last retransmit,
424 	u32	undo_marker;	/* snd_una upon a new recovery episode. */
425 	int	undo_retrans;	/* number of undoable retransmissions. */
426 	u64	bytes_retrans;	/* RFC4898 tcpEStatsPerfOctetsRetrans
429 	u32	total_retrans;	/* Total retransmits for entire connection */
430 	u32	rto_stamp;	/* Start time (ms) of last CA_Loss recovery */
431 	u16	total_rto;	/* Total number of RTO timeouts, including
434 	u16	total_rto_recoveries;	/* Total number of RTO recoveries,
437 	u32	total_rto_time;	/* ms spent in (completed) RTO recoveries. */
439 	u32	urg_seq;	/* Seq of received urgent pointer */
440 	unsigned int		keepalive_time;	  /* time before keep alive takes place */
441 	unsigned int		keepalive_intvl;  /* time interval between keep alive probes */
443 	int			linger2;
448 	u8	bpf_sock_ops_cb_flags;  /* Control calling BPF programs
451 	u8	bpf_chg_cc_inprogress:1; /* In the middle of
485 	const struct tcp_sock_af_ops	*af_specific;  argument
489 	struct tcp_md5sig_info	__rcu *md5sig_info;
492 	struct tcp_ao_info	__rcu *ao_info;
497 	struct tcp_fastopen_request *fastopen_req;
501 	struct request_sock __rcu *fastopen_rsk;
502 	struct saved_syn *saved_syn;