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tcp.h
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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  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 
37 struct 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 */
46 void rds_tcp_tune(struct socket *sock);
47 void rds_tcp_nonagle(struct socket *sock);
48 void rds_tcp_set_callbacks(struct socket *sock, struct rds_connection *conn);
49 void rds_tcp_restore_callbacks(struct socket *sock,
50  struct rds_tcp_connection *tc);
51 u32 rds_tcp_snd_nxt(struct rds_tcp_connection *tc);
52 u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
53 u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
54 extern struct rds_transport rds_tcp_transport;
55 
56 /* tcp_connect.c */
57 int rds_tcp_conn_connect(struct rds_connection *conn);
58 void rds_tcp_conn_shutdown(struct rds_connection *conn);
59 void rds_tcp_state_change(struct sock *sk);
60 
61 /* tcp_listen.c */
62 int rds_tcp_listen_init(void);
63 void rds_tcp_listen_stop(void);
64 void rds_tcp_listen_data_ready(struct sock *sk, int bytes);
65 
66 /* tcp_recv.c */
67 int rds_tcp_recv_init(void);
68 void rds_tcp_recv_exit(void);
69 void rds_tcp_data_ready(struct sock *sk, int bytes);
70 int rds_tcp_recv(struct rds_connection *conn);
71 void rds_tcp_inc_free(struct rds_incoming *inc);
72 int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iovec *iov,
73  size_t size);
74 
75 /* tcp_send.c */
76 void rds_tcp_xmit_prepare(struct rds_connection *conn);
77 void rds_tcp_xmit_complete(struct rds_connection *conn);
78 int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
79  unsigned int hdr_off, unsigned int sg, unsigned int off);
80 void rds_tcp_write_space(struct sock *sk);
81 
82 /* tcp_stats.c */
83 DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);
84 #define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)
85 unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
86  unsigned int avail);
87 
88 #endif
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