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 void rds_tcp_tune(struct socket *sock); 53 void rds_tcp_nonagle(struct socket *sock); 54 void rds_tcp_set_callbacks(struct socket *sock, struct rds_conn_path *cp); 55 void rds_tcp_reset_callbacks(struct socket *sock, struct rds_conn_path *cp); 56 void rds_tcp_restore_callbacks(struct socket *sock, 57 struct rds_tcp_connection *tc); 58 u32 rds_tcp_write_seq(struct rds_tcp_connection *tc); 59 u32 rds_tcp_snd_una(struct rds_tcp_connection *tc); 60 u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq); 61 extern struct rds_transport rds_tcp_transport; 62 void rds_tcp_accept_work(struct sock *sk); 63 64 /* tcp_connect.c */ 65 int rds_tcp_conn_path_connect(struct rds_conn_path *cp); 66 void rds_tcp_conn_path_shutdown(struct rds_conn_path *conn); 67 void rds_tcp_state_change(struct sock *sk); 68 69 /* tcp_listen.c */ 70 struct socket *rds_tcp_listen_init(struct net *net, bool isv6); 71 void rds_tcp_listen_stop(struct socket *sock, struct work_struct *acceptor); 72 void rds_tcp_listen_data_ready(struct sock *sk); 73 int rds_tcp_accept_one(struct socket *sock); 74 int rds_tcp_keepalive(struct socket *sock); 75 void *rds_tcp_listen_sock_def_readable(struct net *net); 76 void rds_tcp_set_linger(struct socket *sock); 77 78 /* tcp_recv.c */ 79 int rds_tcp_recv_init(void); 80 void rds_tcp_recv_exit(void); 81 void rds_tcp_data_ready(struct sock *sk); 82 int rds_tcp_recv_path(struct rds_conn_path *cp); 83 void rds_tcp_inc_free(struct rds_incoming *inc); 84 int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to); 85 86 /* tcp_send.c */ 87 void rds_tcp_xmit_path_prepare(struct rds_conn_path *cp); 88 void rds_tcp_xmit_path_complete(struct rds_conn_path *cp); 89 int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm, 90 unsigned int hdr_off, unsigned int sg, unsigned int off); 91 void rds_tcp_write_space(struct sock *sk); 92 93 /* tcp_stats.c */ 94 DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats); 95 #define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member) 96 unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter, 97 unsigned int avail); 98 99 #endif 100