tcp.h revision ff51bf841587c75b58d25ed77263158619784dd3 
1#ifndef _RDS_TCP_H
2#define _RDS_TCP_H
3
4#define RDS_TCP_PORT	16385
5
6struct rds_tcp_incoming {
7	struct rds_incoming	ti_inc;
8	struct sk_buff_head	ti_skb_list;
9};
10
11struct rds_tcp_connection {
12
13	struct list_head	t_tcp_node;
14	struct rds_connection   *conn;
15	struct socket		*t_sock;
16	void			*t_orig_write_space;
17	void			*t_orig_data_ready;
18	void			*t_orig_state_change;
19
20	struct rds_tcp_incoming	*t_tinc;
21	size_t			t_tinc_hdr_rem;
22	size_t			t_tinc_data_rem;
23
24	/* XXX error report? */
25	struct work_struct	t_conn_w;
26	struct work_struct	t_send_w;
27	struct work_struct	t_down_w;
28	struct work_struct	t_recv_w;
29
30	/* for info exporting only */
31	struct list_head	t_list_item;
32	u32			t_last_sent_nxt;
33	u32			t_last_expected_una;
34	u32			t_last_seen_una;
35};
36
37struct rds_tcp_statistics {
38	uint64_t	s_tcp_data_ready_calls;
39	uint64_t	s_tcp_write_space_calls;
40	uint64_t	s_tcp_sndbuf_full;
41	uint64_t	s_tcp_connect_raced;
42	uint64_t	s_tcp_listen_closed_stale;
43};
44
45/* tcp.c */
46void rds_tcp_tune(struct socket *sock);
47void rds_tcp_nonagle(struct socket *sock);
48void rds_tcp_set_callbacks(struct socket *sock, struct rds_connection *conn);
49void rds_tcp_restore_callbacks(struct socket *sock,
50			       struct rds_tcp_connection *tc);
51u32 rds_tcp_snd_nxt(struct rds_tcp_connection *tc);
52u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
53u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
54extern struct rds_transport rds_tcp_transport;
55
56/* tcp_connect.c */
57int rds_tcp_conn_connect(struct rds_connection *conn);
58void rds_tcp_conn_shutdown(struct rds_connection *conn);
59void rds_tcp_state_change(struct sock *sk);
60
61/* tcp_listen.c */
62int rds_tcp_listen_init(void);
63void rds_tcp_listen_stop(void);
64void rds_tcp_listen_data_ready(struct sock *sk, int bytes);
65
66/* tcp_recv.c */
67int rds_tcp_recv_init(void);
68void rds_tcp_recv_exit(void);
69void rds_tcp_data_ready(struct sock *sk, int bytes);
70int rds_tcp_recv(struct rds_connection *conn);
71void rds_tcp_inc_free(struct rds_incoming *inc);
72int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iovec *iov,
73			     size_t size);
74
75/* tcp_send.c */
76void rds_tcp_xmit_prepare(struct rds_connection *conn);
77void rds_tcp_xmit_complete(struct rds_connection *conn);
78int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
79	         unsigned int hdr_off, unsigned int sg, unsigned int off);
80void rds_tcp_write_space(struct sock *sk);
81
82/* tcp_stats.c */
83DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);
84#define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)
85unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
86				     unsigned int avail);
87
88#endif
89