1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _RDS_TCP_H
3 #define _RDS_TCP_H
4
5 #define RDS_TCP_PORT 16385
6
7 struct rds_tcp_incoming {
8 struct rds_incoming ti_inc;
9 struct sk_buff_head ti_skb_list;
10 };
11
12 struct rds_tcp_connection {
13
14 struct list_head t_tcp_node;
15 bool t_tcp_node_detached;
16 struct rds_conn_path *t_cpath;
17 /* t_conn_path_lock synchronizes the connection establishment between
18 * rds_tcp_accept_one and rds_tcp_conn_path_connect
19 */
20 struct mutex t_conn_path_lock;
21 struct socket *t_sock;
22 void *t_orig_write_space;
23 void *t_orig_data_ready;
24 void *t_orig_state_change;
25
26 struct rds_tcp_incoming *t_tinc;
27 size_t t_tinc_hdr_rem;
28 size_t t_tinc_data_rem;
29
30 /* XXX error report? */
31 struct work_struct t_conn_w;
32 struct work_struct t_send_w;
33 struct work_struct t_down_w;
34 struct work_struct t_recv_w;
35
36 /* for info exporting only */
37 struct list_head t_list_item;
38 u32 t_last_sent_nxt;
39 u32 t_last_expected_una;
40 u32 t_last_seen_una;
41 };
42
43 struct rds_tcp_statistics {
44 uint64_t s_tcp_data_ready_calls;
45 uint64_t s_tcp_write_space_calls;
46 uint64_t s_tcp_sndbuf_full;
47 uint64_t s_tcp_connect_raced;
48 uint64_t s_tcp_listen_closed_stale;
49 };
50
51 /* tcp.c */
52 bool rds_tcp_tune(struct socket *sock);
53 void rds_tcp_set_callbacks(struct socket *sock, struct rds_conn_path *cp);
54 void rds_tcp_reset_callbacks(struct socket *sock, struct rds_conn_path *cp);
55 void rds_tcp_restore_callbacks(struct socket *sock,
56 struct rds_tcp_connection *tc);
57 u32 rds_tcp_write_seq(struct rds_tcp_connection *tc);
58 u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
59 extern struct rds_transport rds_tcp_transport;
60 void rds_tcp_accept_work(struct sock *sk);
61 int rds_tcp_laddr_check(struct net *net, const struct in6_addr *addr,
62 __u32 scope_id);
63 /* tcp_connect.c */
64 int rds_tcp_conn_path_connect(struct rds_conn_path *cp);
65 void rds_tcp_conn_path_shutdown(struct rds_conn_path *conn);
66 void rds_tcp_state_change(struct sock *sk);
67
68 /* tcp_listen.c */
69 struct socket *rds_tcp_listen_init(struct net *net, bool isv6);
70 void rds_tcp_listen_stop(struct socket *sock, struct work_struct *acceptor);
71 void rds_tcp_listen_data_ready(struct sock *sk);
72 int rds_tcp_accept_one(struct socket *sock);
73 void rds_tcp_keepalive(struct socket *sock);
74 void *rds_tcp_listen_sock_def_readable(struct net *net);
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
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.