[linux-block.git] / net / rds / tcp.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _RDS_TCP_H
#define _RDS_TCP_H

#define RDS_TCP_PORT	16385

struct rds_tcp_incoming {
	struct rds_incoming	ti_inc;
	struct sk_buff_head	ti_skb_list;
};

struct rds_tcp_connection {

	struct list_head	t_tcp_node;
	bool			t_tcp_node_detached;
	struct rds_conn_path	*t_cpath;
	/* t_conn_path_lock synchronizes the connection establishment between
	 * rds_tcp_accept_one and rds_tcp_conn_path_connect
	 */
	struct mutex		t_conn_path_lock;
	struct socket		*t_sock;
	void			*t_orig_write_space;
	void			*t_orig_data_ready;
	void			*t_orig_state_change;

	struct rds_tcp_incoming	*t_tinc;
	size_t			t_tinc_hdr_rem;
	size_t			t_tinc_data_rem;

	/* XXX error report? */
	struct work_struct	t_conn_w;
	struct work_struct	t_send_w;
	struct work_struct	t_down_w;
	struct work_struct	t_recv_w;

	/* for info exporting only */
	struct list_head	t_list_item;
	u32			t_last_sent_nxt;
	u32			t_last_expected_una;
	u32			t_last_seen_una;
};

struct rds_tcp_statistics {
	uint64_t	s_tcp_data_ready_calls;
	uint64_t	s_tcp_write_space_calls;
	uint64_t	s_tcp_sndbuf_full;
	uint64_t	s_tcp_connect_raced;
	uint64_t	s_tcp_listen_closed_stale;
};

/* tcp.c */
bool rds_tcp_tune(struct socket *sock);
void rds_tcp_set_callbacks(struct socket *sock, struct rds_conn_path *cp);
void rds_tcp_reset_callbacks(struct socket *sock, struct rds_conn_path *cp);
void rds_tcp_restore_callbacks(struct socket *sock,
			       struct rds_tcp_connection *tc);
u32 rds_tcp_write_seq(struct rds_tcp_connection *tc);
u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
extern struct rds_transport rds_tcp_transport;
void rds_tcp_accept_work(struct sock *sk);
int rds_tcp_laddr_check(struct net *net, const struct in6_addr *addr,
			__u32 scope_id);
/* tcp_connect.c */
int rds_tcp_conn_path_connect(struct rds_conn_path *cp);
void rds_tcp_conn_path_shutdown(struct rds_conn_path *conn);
void rds_tcp_state_change(struct sock *sk);

/* tcp_listen.c */
struct socket *rds_tcp_listen_init(struct net *net, bool isv6);
void rds_tcp_listen_stop(struct socket *sock, struct work_struct *acceptor);
void rds_tcp_listen_data_ready(struct sock *sk);
int rds_tcp_accept_one(struct socket *sock);
void rds_tcp_keepalive(struct socket *sock);
void *rds_tcp_listen_sock_def_readable(struct net *net);

/* tcp_recv.c */
int rds_tcp_recv_init(void);
void rds_tcp_recv_exit(void);
void rds_tcp_data_ready(struct sock *sk);
int rds_tcp_recv_path(struct rds_conn_path *cp);
void rds_tcp_inc_free(struct rds_incoming *inc);
int rds_tcp_inc_copy_to_user(struct rds_incoming *inc, struct iov_iter *to);

/* tcp_send.c */
void rds_tcp_xmit_path_prepare(struct rds_conn_path *cp);
void rds_tcp_xmit_path_complete(struct rds_conn_path *cp);
int rds_tcp_xmit(struct rds_connection *conn, struct rds_message *rm,
		 unsigned int hdr_off, unsigned int sg, unsigned int off);
void rds_tcp_write_space(struct sock *sk);

/* tcp_stats.c */
DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);
#define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)
unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
				     unsigned int avail);

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
70041088 AG	2	#ifndef _RDS_TCP_H
	3	#define _RDS_TCP_H
	4
	5	#define RDS_TCP_PORT 16385
	6
	7	struct rds_tcp_incoming {
	8	struct rds_incoming ti_inc;
	9	struct sk_buff_head ti_skb_list;
	10	};
	11
	12	struct rds_tcp_connection {
	13
	14	struct list_head t_tcp_node;
f10b4cff	15	bool t_tcp_node_detached;
02105b2c SV	16	struct rds_conn_path *t_cpath;
02105b2c SV	17	/* t_conn_path_lock synchronizes the connection establishment between
b04e8554	18	* rds_tcp_accept_one and rds_tcp_conn_path_connect
bd7c5f98	19	*/
02105b2c	20	struct mutex t_conn_path_lock;
70041088 AG	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
	43	struct 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 */
6997fbd7	52	bool rds_tcp_tune(struct socket *sock);
ea3b1ea5 SV	53	void rds_tcp_set_callbacks(struct socket sock, struct rds_conn_path cp);
ea3b1ea5 SV	54	void rds_tcp_reset_callbacks(struct socket sock, struct rds_conn_path cp);
70041088 AG	55	void rds_tcp_restore_callbacks(struct socket *sock,
70041088 AG	56	struct rds_tcp_connection *tc);
b589513e	57	u32 rds_tcp_write_seq(struct rds_tcp_connection *tc);
70041088 AG	58	u32 rds_tcp_snd_una(struct rds_tcp_connection *tc);
	59	u64 rds_tcp_map_seq(struct rds_tcp_connection *tc, u32 seq);
	60	extern struct rds_transport rds_tcp_transport;
467fa153	61	void rds_tcp_accept_work(struct sock *sk);
aced3ce5 RS	62	int rds_tcp_laddr_check(struct net net, const struct in6_addr addr,
aced3ce5 RS	63	__u32 scope_id);
70041088	64	/* tcp_connect.c */
b04e8554	65	int rds_tcp_conn_path_connect(struct rds_conn_path *cp);
226f7a7d	66	void rds_tcp_conn_path_shutdown(struct rds_conn_path *conn);
70041088 AG	67	void rds_tcp_state_change(struct sock *sk);
	68
	69	/* tcp_listen.c */
1e2b44e7	70	struct socket rds_tcp_listen_init(struct net net, bool isv6);
b21dd450	71	void rds_tcp_listen_stop(struct socket sock, struct work_struct acceptor);
676d2369	72	void rds_tcp_listen_data_ready(struct sock *sk);
467fa153	73	int rds_tcp_accept_one(struct socket *sock);
480aeb96	74	void rds_tcp_keepalive(struct socket *sock);
a93d01f5	75	void rds_tcp_listen_sock_def_readable(struct net net);
70041088 AG	76
70041088 AG	77	/* tcp_recv.c */
ef87b7ea	78	int rds_tcp_recv_init(void);
70041088	79	void rds_tcp_recv_exit(void);
676d2369	80	void rds_tcp_data_ready(struct sock *sk);
2da43c4a	81	int rds_tcp_recv_path(struct rds_conn_path *cp);
70041088	82	void rds_tcp_inc_free(struct rds_incoming *inc);
c310e72c	83	int rds_tcp_inc_copy_to_user(struct rds_incoming inc, struct iov_iter to);
70041088 AG	84
70041088 AG	85	/* tcp_send.c */
226f7a7d SV	86	void rds_tcp_xmit_path_prepare(struct rds_conn_path *cp);
226f7a7d SV	87	void rds_tcp_xmit_path_complete(struct rds_conn_path *cp);
70041088	88	int rds_tcp_xmit(struct rds_connection conn, struct rds_message rm,
5c3da57d	89	unsigned int hdr_off, unsigned int sg, unsigned int off);
70041088	90	void rds_tcp_write_space(struct sock *sk);
70041088 AG	91
	92	/* tcp_stats.c */
	93	DECLARE_PER_CPU(struct rds_tcp_statistics, rds_tcp_stats);
	94	#define rds_tcp_stats_inc(member) rds_stats_inc_which(rds_tcp_stats, member)
	95	unsigned int rds_tcp_stats_info_copy(struct rds_info_iterator *iter,
	96	unsigned int avail);
	97
	98	#endif