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