LXR linux/net/rds/tcp.h

   1#ifndef _RDS_TCP_H
   2#define _RDS_TCP_H
   3
   4#define RDS_TCP_PORT    16385
   5
   6struct rds_tcp_incoming {
   7        struct rds_incoming     ti_inc;
   8        struct sk_buff_head     ti_skb_list;
   9};
  10
  11struct rds_tcp_connection {
  12
  13        struct list_head        t_tcp_node;
  14        struct rds_conn_path    *t_cpath;
  15        /* t_conn_path_lock synchronizes the connection establishment between
  16         * rds_tcp_accept_one and rds_tcp_conn_path_connect
  17         */
  18        struct mutex            t_conn_path_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
  41struct 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 */
  50void rds_tcp_tune(struct socket *sock);
  51void rds_tcp_nonagle(struct socket *sock);
  52void rds_tcp_set_callbacks(struct socket *sock, struct rds_conn_path *cp);
  53void rds_tcp_reset_callbacks(struct socket *sock, struct rds_conn_path *cp);
  54void rds_tcp_restore_callbacks(struct socket *sock,
  55                               struct rds_tcp_connection *tc);
  56u32 rds_tcp_snd_nxt(struct rds_tcp_connection *tc);
  57u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
  58u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
  59extern struct rds_transport rds_tcp_transport;
  60void rds_tcp_accept_work(struct sock *sk);
  61
  62/* tcp_connect.c */
  63int rds_tcp_conn_path_connect(struct rds_conn_path *cp);
  64void rds_tcp_conn_path_shutdown(struct rds_conn_path *conn);
  65void rds_tcp_state_change(struct sock *sk);
  66
  67/* tcp_listen.c */
  68struct socket *rds_tcp_listen_init(struct net *);
  69void rds_tcp_listen_stop(struct socket *);
  70void rds_tcp_listen_data_ready(struct sock *sk, int bytes);
  71int rds_tcp_accept_one(struct socket *sock);
  72int rds_tcp_keepalive(struct socket *sock);
  73void *rds_tcp_listen_sock_def_readable(struct net *net);
  74
  75/* tcp_recv.c */
  76int rds_tcp_recv_init(void);
  77void rds_tcp_recv_exit(void);
  78void rds_tcp_data_ready(struct sock *sk, int bytes);
  79int rds_tcp_recv_path(struct rds_conn_path *cp);
  80void rds_tcp_inc_free(struct rds_incoming *inc);
  81int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iovec *iov,
  82                             size_t size);
  83
  84/* tcp_send.c */
  85void rds_tcp_xmit_path_prepare(struct rds_conn_path *cp);
  86void rds_tcp_xmit_path_complete(struct rds_conn_path *cp);
  87int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
  88                 unsigned int hdr_off, unsigned int sg, unsigned int off);
  89void rds_tcp_write_space(struct sock *sk);
  90
  91/* tcp_stats.c */
  92DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);
  93#define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)
  94unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
  95                                     unsigned int avail);
  96
  97#endif
  98