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         struct socket           *t_sock;
  16         void                    *t_orig_write_space;
  17         void                    *t_orig_data_ready;
  18         void                    *t_orig_state_change;
  19
  20         struct rds_tcp_incoming *t_tinc;
  21         size_t                  t_tinc_hdr_rem;
  22         size_t                  t_tinc_data_rem;
  23
  24         /* XXX error report? */
  25         struct work_struct      t_conn_w;
  26         struct work_struct      t_send_w;
  27         struct work_struct      t_down_w;
  28         struct work_struct      t_recv_w;
  29
  30         /* for info exporting only */
  31         struct list_head        t_list_item;
  32         u32                     t_last_sent_nxt;
  33         u32                     t_last_expected_una;
  34         u32                     t_last_seen_una;
  35 };
  36
  37 struct rds_tcp_statistics {
  38         uint64_t        s_tcp_data_ready_calls;
  39         uint64_t        s_tcp_write_space_calls;
  40         uint64_t        s_tcp_sndbuf_full;
  41         uint64_t        s_tcp_connect_raced;
  42         uint64_t        s_tcp_listen_closed_stale;
  43 };
  44
  45 /* tcp.c */
  46 void rds_tcp_tune(struct socket *sock);
  47 void rds_tcp_nonagle(struct socket *sock);
  48 void rds_tcp_set_callbacks(struct socket *sock, struct rds_connection *conn);
  49 void rds_tcp_restore_callbacks(struct socket *sock,
  50                                struct rds_tcp_connection *tc);
  51 u32 rds_tcp_snd_nxt(struct rds_tcp_connection *tc);
  52 u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
  53 u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
  54 extern struct rds_transport rds_tcp_transport;
  55
  56 /* tcp_connect.c */
  57 int rds_tcp_conn_connect(struct rds_connection *conn);
  58 void rds_tcp_conn_shutdown(struct rds_connection *conn);
  59 void rds_tcp_state_change(struct sock *sk);
  60
  61 /* tcp_listen.c */
  62 int rds_tcp_listen_init(void);
  63 void rds_tcp_listen_stop(void);
  64 void rds_tcp_listen_data_ready(struct sock *sk, int bytes);
  65
  66 /* tcp_recv.c */
  67 int rds_tcp_recv_init(void);
  68 void rds_tcp_recv_exit(void);
  69 void rds_tcp_data_ready(struct sock *sk, int bytes);
  70 int rds_tcp_recv(struct rds_connection *conn);
  71 void rds_tcp_inc_free(struct rds_incoming *inc);
  72 int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iovec *iov,
  73                              size_t size);
  74
  75 /* tcp_send.c */
  76 void rds_tcp_xmit_prepare(struct rds_connection *conn);
  77 void rds_tcp_xmit_complete(struct rds_connection *conn);
  78 int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
  79                  unsigned int hdr_off, unsigned int sg, unsigned int off);
  80 void rds_tcp_write_space(struct sock *sk);
  81
  82 /* tcp_stats.c */
  83 DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);
  84 #define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)
  85 unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
  86                                      unsigned int avail);
  87
  88 #endif