Root/net/rds/tcp.h

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 */
46int __init rds_tcp_init(void);
47void rds_tcp_exit(void);
48void rds_tcp_tune(struct socket *sock);
49void rds_tcp_nonagle(struct socket *sock);
50void rds_tcp_set_callbacks(struct socket *sock, struct rds_connection *conn);
51void rds_tcp_restore_callbacks(struct socket *sock,
52                   struct rds_tcp_connection *tc);
53u32 rds_tcp_snd_nxt(struct rds_tcp_connection *tc);
54u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
55u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
56extern struct rds_transport rds_tcp_transport;
57
58/* tcp_connect.c */
59int rds_tcp_conn_connect(struct rds_connection *conn);
60void rds_tcp_conn_shutdown(struct rds_connection *conn);
61void rds_tcp_state_change(struct sock *sk);
62
63/* tcp_listen.c */
64int __init rds_tcp_listen_init(void);
65void rds_tcp_listen_stop(void);
66void rds_tcp_listen_data_ready(struct sock *sk, int bytes);
67
68/* tcp_recv.c */
69int __init rds_tcp_recv_init(void);
70void rds_tcp_recv_exit(void);
71void rds_tcp_data_ready(struct sock *sk, int bytes);
72int rds_tcp_recv(struct rds_connection *conn);
73void rds_tcp_inc_purge(struct rds_incoming *inc);
74void rds_tcp_inc_free(struct rds_incoming *inc);
75int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iovec *iov,
76                 size_t size);
77
78/* tcp_send.c */
79void rds_tcp_xmit_prepare(struct rds_connection *conn);
80void rds_tcp_xmit_complete(struct rds_connection *conn);
81int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
82             unsigned int hdr_off, unsigned int sg, unsigned int off);
83void rds_tcp_write_space(struct sock *sk);
84int rds_tcp_xmit_cong_map(struct rds_connection *conn,
85              struct rds_cong_map *map, unsigned long offset);
86
87/* tcp_stats.c */
88DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);
89#define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)
90unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
91                     unsigned int avail);
92
93#endif
94

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