net/rds/tcp.h

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