xref: /openbmc/linux/net/rds/tcp.h (revision 5d0e4d78)
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 	struct rds_conn_path	*t_cpath;
15 	/* t_conn_path_lock synchronizes the connection establishment between
16 	 * rds_tcp_accept_one and rds_tcp_conn_path_connect
17 	 */
18 	struct mutex		t_conn_path_lock;
19 	struct socket		*t_sock;
20 	void			*t_orig_write_space;
21 	void			*t_orig_data_ready;
22 	void			*t_orig_state_change;
23 
24 	struct rds_tcp_incoming	*t_tinc;
25 	size_t			t_tinc_hdr_rem;
26 	size_t			t_tinc_data_rem;
27 
28 	/* XXX error report? */
29 	struct work_struct	t_conn_w;
30 	struct work_struct	t_send_w;
31 	struct work_struct	t_down_w;
32 	struct work_struct	t_recv_w;
33 
34 	/* for info exporting only */
35 	struct list_head	t_list_item;
36 	u32			t_last_sent_nxt;
37 	u32			t_last_expected_una;
38 	u32			t_last_seen_una;
39 };
40 
41 struct rds_tcp_statistics {
42 	uint64_t	s_tcp_data_ready_calls;
43 	uint64_t	s_tcp_write_space_calls;
44 	uint64_t	s_tcp_sndbuf_full;
45 	uint64_t	s_tcp_connect_raced;
46 	uint64_t	s_tcp_listen_closed_stale;
47 };
48 
49 /* tcp.c */
50 void rds_tcp_tune(struct socket *sock);
51 void rds_tcp_nonagle(struct socket *sock);
52 void rds_tcp_set_callbacks(struct socket *sock, struct rds_conn_path *cp);
53 void rds_tcp_reset_callbacks(struct socket *sock, struct rds_conn_path *cp);
54 void rds_tcp_restore_callbacks(struct socket *sock,
55 			       struct rds_tcp_connection *tc);
56 u32 rds_tcp_snd_nxt(struct rds_tcp_connection *tc);
57 u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
58 u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
59 extern struct rds_transport rds_tcp_transport;
60 void rds_tcp_accept_work(struct sock *sk);
61 
62 /* tcp_connect.c */
63 int rds_tcp_conn_path_connect(struct rds_conn_path *cp);
64 void rds_tcp_conn_path_shutdown(struct rds_conn_path *conn);
65 void rds_tcp_state_change(struct sock *sk);
66 
67 /* tcp_listen.c */
68 struct socket *rds_tcp_listen_init(struct net *);
69 void rds_tcp_listen_stop(struct socket *sock, struct work_struct *acceptor);
70 void rds_tcp_listen_data_ready(struct sock *sk);
71 int rds_tcp_accept_one(struct socket *sock);
72 int rds_tcp_keepalive(struct socket *sock);
73 void *rds_tcp_listen_sock_def_readable(struct net *net);
74 void rds_tcp_set_linger(struct socket *sock);
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