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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/net/rds/tcp.h
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#ifndef _RDS_TCP_H

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#define _RDS_TCP_H

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#define RDS_TCP_PORT	16385

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struct rds_tcp_incoming {

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	struct rds_incoming	ti_inc;

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	struct sk_buff_head	ti_skb_list;

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};

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struct rds_tcp_connection {

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	struct list_head	t_tcp_node;

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	struct rds_connection   *conn;

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	struct socket		*t_sock;

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	void			*t_orig_write_space;

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	void			*t_orig_data_ready;

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	void			*t_orig_state_change;

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	struct rds_tcp_incoming	*t_tinc;

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	size_t			t_tinc_hdr_rem;

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	size_t			t_tinc_data_rem;

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	/* XXX error report? */

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	struct work_struct	t_conn_w;

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	struct work_struct	t_send_w;

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	struct work_struct	t_down_w;

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	struct work_struct	t_recv_w;

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	/* for info exporting only */

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	struct list_head	t_list_item;

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	u32			t_last_sent_nxt;

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	u32			t_last_expected_una;

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	u32			t_last_seen_una;

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};

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struct rds_tcp_statistics {

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	uint64_t	s_tcp_data_ready_calls;

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	uint64_t	s_tcp_write_space_calls;

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	uint64_t	s_tcp_sndbuf_full;

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	uint64_t	s_tcp_connect_raced;

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	uint64_t	s_tcp_listen_closed_stale;

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};

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/* tcp.c */

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void rds_tcp_tune(struct socket *sock);

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void rds_tcp_nonagle(struct socket *sock);

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void rds_tcp_set_callbacks(struct socket *sock, struct rds_connection *conn);

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void rds_tcp_restore_callbacks(struct socket *sock,

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			       struct rds_tcp_connection *tc);

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u32 rds_tcp_snd_nxt(struct rds_tcp_connection *tc);

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u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);

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u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);

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extern struct rds_transport rds_tcp_transport;

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/* tcp_connect.c */

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int rds_tcp_conn_connect(struct rds_connection *conn);

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void rds_tcp_conn_shutdown(struct rds_connection *conn);

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void rds_tcp_state_change(struct sock *sk);

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/* tcp_listen.c */

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int rds_tcp_listen_init(void);

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void rds_tcp_listen_stop(void);

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void rds_tcp_listen_data_ready(struct sock *sk, int bytes);

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/* tcp_recv.c */

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int rds_tcp_recv_init(void);

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void rds_tcp_recv_exit(void);

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void rds_tcp_data_ready(struct sock *sk, int bytes);

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int rds_tcp_recv(struct rds_connection *conn);

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void rds_tcp_inc_free(struct rds_incoming *inc);

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int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iovec *iov,

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			     size_t size);

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/* tcp_send.c */

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void rds_tcp_xmit_prepare(struct rds_connection *conn);

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void rds_tcp_xmit_complete(struct rds_connection *conn);

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int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,

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	         unsigned int hdr_off, unsigned int sg, unsigned int off);

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void rds_tcp_write_space(struct sock *sk);

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/* tcp_stats.c */

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DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);

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#define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)

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unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,

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				     unsigned int avail);

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#endif

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