net/rds/tcp.h

   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