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 struct rds_conn_path *t_cpath; 16 /* t_conn_path_lock synchronizes the connection establishment between 17 * rds_tcp_accept_one and rds_tcp_conn_path_connect 18 */ 19 struct mutex t_conn_path_lock; 20 struct socket *t_sock; 21 void *t_orig_write_space; 22 void *t_orig_data_ready; 23 void *t_orig_state_change; 24 25 struct rds_tcp_incoming *t_tinc; 26 size_t t_tinc_hdr_rem; 27 size_t t_tinc_data_rem; 28 29 /* XXX error report? */ 30 struct work_struct t_conn_w; 31 struct work_struct t_send_w; 32 struct work_struct t_down_w; 33 struct work_struct t_recv_w; 34 35 /* for info exporting only */ 36 struct list_head t_list_item; 37 u32 t_last_sent_nxt; 38 u32 t_last_expected_una; 39 u32 t_last_seen_una; 40 }; 41 42 struct rds_tcp_statistics { 43 uint64_t s_tcp_data_ready_calls; 44 uint64_t s_tcp_write_space_calls; 45 uint64_t s_tcp_sndbuf_full; 46 uint64_t s_tcp_connect_raced; 47 uint64_t s_tcp_listen_closed_stale; 48 }; 49 50 /* tcp.c */ 51 void rds_tcp_tune(struct socket *sock); 52 void rds_tcp_nonagle(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_snd_nxt(struct rds_tcp_connection *tc); 58 u32 rds_tcp_snd_una(struct rds_tcp_connection *tc); 59 u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq); 60 extern struct rds_transport rds_tcp_transport; 61 void rds_tcp_accept_work(struct sock *sk); 62 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 *); 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 int rds_tcp_keepalive(struct socket *sock); 74 void *rds_tcp_listen_sock_def_readable(struct net *net); 75 void rds_tcp_set_linger(struct socket *sock); 76 77 /* tcp_recv.c */ 78 int rds_tcp_recv_init(void); 79 void rds_tcp_recv_exit(void); 80 void rds_tcp_data_ready(struct sock *sk); 81 int rds_tcp_recv_path(struct rds_conn_path *cp); 82 void rds_tcp_inc_free(struct rds_incoming *inc); 83 int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to); 84 85 /* tcp_send.c */ 86 void rds_tcp_xmit_path_prepare(struct rds_conn_path *cp); 87 void rds_tcp_xmit_path_complete(struct rds_conn_path *cp); 88 int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm, 89 unsigned int hdr_off, unsigned int sg, unsigned int off); 90 void rds_tcp_write_space(struct sock *sk); 91 92 /* tcp_stats.c */ 93 DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats); 94 #define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member) 95 unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter, 96 unsigned int avail); 97 98 #endif 99