1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _RDS_TCP_H 3*4882a593Smuzhiyun #define _RDS_TCP_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #define RDS_TCP_PORT 16385 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun struct rds_tcp_incoming { 8*4882a593Smuzhiyun struct rds_incoming ti_inc; 9*4882a593Smuzhiyun struct sk_buff_head ti_skb_list; 10*4882a593Smuzhiyun }; 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun struct rds_tcp_connection { 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun struct list_head t_tcp_node; 15*4882a593Smuzhiyun bool t_tcp_node_detached; 16*4882a593Smuzhiyun struct rds_conn_path *t_cpath; 17*4882a593Smuzhiyun /* t_conn_path_lock synchronizes the connection establishment between 18*4882a593Smuzhiyun * rds_tcp_accept_one and rds_tcp_conn_path_connect 19*4882a593Smuzhiyun */ 20*4882a593Smuzhiyun struct mutex t_conn_path_lock; 21*4882a593Smuzhiyun struct socket *t_sock; 22*4882a593Smuzhiyun void *t_orig_write_space; 23*4882a593Smuzhiyun void *t_orig_data_ready; 24*4882a593Smuzhiyun void *t_orig_state_change; 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun struct rds_tcp_incoming *t_tinc; 27*4882a593Smuzhiyun size_t t_tinc_hdr_rem; 28*4882a593Smuzhiyun size_t t_tinc_data_rem; 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun /* XXX error report? */ 31*4882a593Smuzhiyun struct work_struct t_conn_w; 32*4882a593Smuzhiyun struct work_struct t_send_w; 33*4882a593Smuzhiyun struct work_struct t_down_w; 34*4882a593Smuzhiyun struct work_struct t_recv_w; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun /* for info exporting only */ 37*4882a593Smuzhiyun struct list_head t_list_item; 38*4882a593Smuzhiyun u32 t_last_sent_nxt; 39*4882a593Smuzhiyun u32 t_last_expected_una; 40*4882a593Smuzhiyun u32 t_last_seen_una; 41*4882a593Smuzhiyun }; 42*4882a593Smuzhiyun 43*4882a593Smuzhiyun struct rds_tcp_statistics { 44*4882a593Smuzhiyun uint64_t s_tcp_data_ready_calls; 45*4882a593Smuzhiyun uint64_t s_tcp_write_space_calls; 46*4882a593Smuzhiyun uint64_t s_tcp_sndbuf_full; 47*4882a593Smuzhiyun uint64_t s_tcp_connect_raced; 48*4882a593Smuzhiyun uint64_t s_tcp_listen_closed_stale; 49*4882a593Smuzhiyun }; 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun /* tcp.c */ 52*4882a593Smuzhiyun void rds_tcp_tune(struct socket *sock); 53*4882a593Smuzhiyun void rds_tcp_set_callbacks(struct socket *sock, struct rds_conn_path *cp); 54*4882a593Smuzhiyun void rds_tcp_reset_callbacks(struct socket *sock, struct rds_conn_path *cp); 55*4882a593Smuzhiyun void rds_tcp_restore_callbacks(struct socket *sock, 56*4882a593Smuzhiyun struct rds_tcp_connection *tc); 57*4882a593Smuzhiyun u32 rds_tcp_write_seq(struct rds_tcp_connection *tc); 58*4882a593Smuzhiyun u32 rds_tcp_snd_una(struct rds_tcp_connection *tc); 59*4882a593Smuzhiyun u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq); 60*4882a593Smuzhiyun extern struct rds_transport rds_tcp_transport; 61*4882a593Smuzhiyun void rds_tcp_accept_work(struct sock *sk); 62*4882a593Smuzhiyun int rds_tcp_laddr_check(struct net *net, const struct in6_addr *addr, 63*4882a593Smuzhiyun __u32 scope_id); 64*4882a593Smuzhiyun /* tcp_connect.c */ 65*4882a593Smuzhiyun int rds_tcp_conn_path_connect(struct rds_conn_path *cp); 66*4882a593Smuzhiyun void rds_tcp_conn_path_shutdown(struct rds_conn_path *conn); 67*4882a593Smuzhiyun void rds_tcp_state_change(struct sock *sk); 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun /* tcp_listen.c */ 70*4882a593Smuzhiyun struct socket *rds_tcp_listen_init(struct net *net, bool isv6); 71*4882a593Smuzhiyun void rds_tcp_listen_stop(struct socket *sock, struct work_struct *acceptor); 72*4882a593Smuzhiyun void rds_tcp_listen_data_ready(struct sock *sk); 73*4882a593Smuzhiyun int rds_tcp_accept_one(struct socket *sock); 74*4882a593Smuzhiyun void rds_tcp_keepalive(struct socket *sock); 75*4882a593Smuzhiyun void *rds_tcp_listen_sock_def_readable(struct net *net); 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun /* tcp_recv.c */ 78*4882a593Smuzhiyun int rds_tcp_recv_init(void); 79*4882a593Smuzhiyun void rds_tcp_recv_exit(void); 80*4882a593Smuzhiyun void rds_tcp_data_ready(struct sock *sk); 81*4882a593Smuzhiyun int rds_tcp_recv_path(struct rds_conn_path *cp); 82*4882a593Smuzhiyun void rds_tcp_inc_free(struct rds_incoming *inc); 83*4882a593Smuzhiyun int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to); 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun /* tcp_send.c */ 86*4882a593Smuzhiyun void rds_tcp_xmit_path_prepare(struct rds_conn_path *cp); 87*4882a593Smuzhiyun void rds_tcp_xmit_path_complete(struct rds_conn_path *cp); 88*4882a593Smuzhiyun int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm, 89*4882a593Smuzhiyun unsigned int hdr_off, unsigned int sg, unsigned int off); 90*4882a593Smuzhiyun void rds_tcp_write_space(struct sock *sk); 91*4882a593Smuzhiyun 92*4882a593Smuzhiyun /* tcp_stats.c */ 93*4882a593Smuzhiyun DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats); 94*4882a593Smuzhiyun #define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member) 95*4882a593Smuzhiyun unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter, 96*4882a593Smuzhiyun unsigned int avail); 97*4882a593Smuzhiyun 98*4882a593Smuzhiyun #endif 99