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1 #ifndef _RDS_TCP_H
2 #define _RDS_TCP_H
3 
4 #define RDS_TCP_PORT	16385
5 
6 struct rds_tcp_incoming {
7 	struct rds_incoming	ti_inc;
8 	struct sk_buff_head	ti_skb_list;
9 };
10 
11 struct rds_tcp_connection {
12 
13 	struct list_head	t_tcp_node;
14 	bool			t_tcp_node_detached;
15 	struct rds_conn_path	*t_cpath;
16 	/* t_conn_path_lock synchronizes the connection establishment between
17 	 * rds_tcp_accept_one and rds_tcp_conn_path_connect
18 	 */
19 	struct mutex		t_conn_path_lock;
20 	struct socket		*t_sock;
21 	void			*t_orig_write_space;
22 	void			*t_orig_data_ready;
23 	void			*t_orig_state_change;
24 
25 	struct rds_tcp_incoming	*t_tinc;
26 	size_t			t_tinc_hdr_rem;
27 	size_t			t_tinc_data_rem;
28 
29 	/* XXX error report? */
30 	struct work_struct	t_conn_w;
31 	struct work_struct	t_send_w;
32 	struct work_struct	t_down_w;
33 	struct work_struct	t_recv_w;
34 
35 	/* for info exporting only */
36 	struct list_head	t_list_item;
37 	u32			t_last_sent_nxt;
38 	u32			t_last_expected_una;
39 	u32			t_last_seen_una;
40 };
41 
42 struct rds_tcp_statistics {
43 	uint64_t	s_tcp_data_ready_calls;
44 	uint64_t	s_tcp_write_space_calls;
45 	uint64_t	s_tcp_sndbuf_full;
46 	uint64_t	s_tcp_connect_raced;
47 	uint64_t	s_tcp_listen_closed_stale;
48 };
49 
50 /* tcp.c */
51 void rds_tcp_tune(struct socket *sock);
52 void rds_tcp_nonagle(struct socket *sock);
53 void rds_tcp_set_callbacks(struct socket *sock, struct rds_conn_path *cp);
54 void rds_tcp_reset_callbacks(struct socket *sock, struct rds_conn_path *cp);
55 void rds_tcp_restore_callbacks(struct socket *sock,
56 			       struct rds_tcp_connection *tc);
57 u32 rds_tcp_snd_nxt(struct rds_tcp_connection *tc);
58 u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
59 u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
60 extern struct rds_transport rds_tcp_transport;
61 void rds_tcp_accept_work(struct sock *sk);
62 
63 /* tcp_connect.c */
64 int rds_tcp_conn_path_connect(struct rds_conn_path *cp);
65 void rds_tcp_conn_path_shutdown(struct rds_conn_path *conn);
66 void rds_tcp_state_change(struct sock *sk);
67 
68 /* tcp_listen.c */
69 struct socket *rds_tcp_listen_init(struct net *);
70 void rds_tcp_listen_stop(struct socket *sock, struct work_struct *acceptor);
71 void rds_tcp_listen_data_ready(struct sock *sk);
72 int rds_tcp_accept_one(struct socket *sock);
73 int rds_tcp_keepalive(struct socket *sock);
74 void *rds_tcp_listen_sock_def_readable(struct net *net);
75 
76 /* tcp_recv.c */
77 int rds_tcp_recv_init(void);
78 void rds_tcp_recv_exit(void);
79 void rds_tcp_data_ready(struct sock *sk);
80 int rds_tcp_recv_path(struct rds_conn_path *cp);
81 void rds_tcp_inc_free(struct rds_incoming *inc);
82 int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to);
83 
84 /* tcp_send.c */
85 void rds_tcp_xmit_path_prepare(struct rds_conn_path *cp);
86 void rds_tcp_xmit_path_complete(struct rds_conn_path *cp);
87 int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
88 		 unsigned int hdr_off, unsigned int sg, unsigned int off);
89 void rds_tcp_write_space(struct sock *sk);
90 
91 /* tcp_stats.c */
92 DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);
93 #define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)
94 unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
95 				     unsigned int avail);
96 
97 #endif
98