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Merge tag 'nfsd-4.9-2' of git://linux-nfs.org/~bfields/linux
[mirror_ubuntu-bionic-kernel.git] / net / rds / tcp.h
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 *);
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
75 /* tcp_recv.c */
76 int rds_tcp_recv_init(void);
77 void rds_tcp_recv_exit(void);
78 void rds_tcp_data_ready(struct sock *sk);
79 int rds_tcp_recv_path(struct rds_conn_path *cp);
80 void rds_tcp_inc_free(struct rds_incoming *inc);
81 int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to);
82
83 /* tcp_send.c */
84 void rds_tcp_xmit_path_prepare(struct rds_conn_path *cp);
85 void rds_tcp_xmit_path_complete(struct rds_conn_path *cp);
86 int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
87 unsigned int hdr_off, unsigned int sg, unsigned int off);
88 void rds_tcp_write_space(struct sock *sk);
89
90 /* tcp_stats.c */
91 DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);
92 #define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)
93 unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
94 unsigned int avail);
95
96 #endif