[linux-2.6-block.git] / fs / ocfs2 / cluster / tcp.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * tcp.h
 *
 * Function prototypes
 *
 * Copyright (C) 2004 Oracle.  All rights reserved.
 */

#ifndef O2CLUSTER_TCP_H
#define O2CLUSTER_TCP_H

#include <linux/socket.h>
#ifdef __KERNEL__
#include <net/sock.h>
#include <linux/tcp.h>
#else
#include <sys/socket.h>
#endif
#include <linux/inet.h>
#include <linux/in.h>

struct o2net_msg
{
	__be16 magic;
	__be16 data_len;
	__be16 msg_type;
	__be16 pad1;
	__be32 sys_status;
	__be32 status;
	__be32 key;
	__be32 msg_num;
	__u8  buf[];
};

typedef int (o2net_msg_handler_func)(struct o2net_msg *msg, u32 len, void *data,
				     void **ret_data);
typedef void (o2net_post_msg_handler_func)(int status, void *data,
					   void *ret_data);

#define O2NET_MAX_PAYLOAD_BYTES  (4096 - sizeof(struct o2net_msg))

/* same as hb delay, we're waiting for another node to recognize our hb */
#define O2NET_RECONNECT_DELAY_MS_DEFAULT	2000

#define O2NET_KEEPALIVE_DELAY_MS_DEFAULT	2000
#define O2NET_IDLE_TIMEOUT_MS_DEFAULT		30000

#define O2NET_TCP_USER_TIMEOUT			0x7fffffff

/* TODO: figure this out.... */
static inline int o2net_link_down(int err, struct socket *sock)
{
	if (sock) {
		if (sock->sk->sk_state != TCP_ESTABLISHED &&
	    	    sock->sk->sk_state != TCP_CLOSE_WAIT)
			return 1;
	}

	if (err >= 0)
		return 0;
	switch (err) {
		/* ????????????????????????? */
		case -ERESTARTSYS:
		case -EBADF:
		/* When the server has died, an ICMP port unreachable
		 * message prompts ECONNREFUSED. */
		case -ECONNREFUSED:
		case -ENOTCONN:
		case -ECONNRESET:
		case -EPIPE:
			return 1;
	}
	return 0;
}

enum {
	O2NET_DRIVER_UNINITED,
	O2NET_DRIVER_READY,
};

int o2net_send_message(u32 msg_type, u32 key, void *data, u32 len,
		       u8 target_node, int *status);
int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *vec,
			   size_t veclen, u8 target_node, int *status);

int o2net_register_handler(u32 msg_type, u32 key, u32 max_len,
			   o2net_msg_handler_func *func, void *data,
			   o2net_post_msg_handler_func *post_func,
			   struct list_head *unreg_list);
void o2net_unregister_handler_list(struct list_head *list);

void o2net_fill_node_map(unsigned long *map, unsigned bytes);

struct o2nm_node;
int o2net_register_hb_callbacks(void);
void o2net_unregister_hb_callbacks(void);
int o2net_start_listening(struct o2nm_node *node);
void o2net_stop_listening(struct o2nm_node *node);
void o2net_disconnect_node(struct o2nm_node *node);
int o2net_num_connected_peers(void);

int o2net_init(void);
void o2net_exit(void);

struct o2net_send_tracking;
struct o2net_sock_container;

#ifdef CONFIG_DEBUG_FS
void o2net_debugfs_init(void);
void o2net_debugfs_exit(void);
void o2net_debug_add_nst(struct o2net_send_tracking *nst);
void o2net_debug_del_nst(struct o2net_send_tracking *nst);
void o2net_debug_add_sc(struct o2net_sock_container *sc);
void o2net_debug_del_sc(struct o2net_sock_container *sc);
#else
static inline void o2net_debugfs_init(void)
{
}
static inline void o2net_debugfs_exit(void)
{
}
static inline void o2net_debug_add_nst(struct o2net_send_tracking *nst)
{
}
static inline void o2net_debug_del_nst(struct o2net_send_tracking *nst)
{
}
static inline void o2net_debug_add_sc(struct o2net_sock_container *sc)
{
}
static inline void o2net_debug_del_sc(struct o2net_sock_container *sc)
{
}
#endif	/* CONFIG_DEBUG_FS */

#endif /* O2CLUSTER_TCP_H */
Commit	Line	Data
328970de	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
fa60ce2c	2	/*
98211489 ZB	3	* tcp.h
	4	*
	5	* Function prototypes
	6	*
	7	* Copyright (C) 2004 Oracle. All rights reserved.
98211489 ZB	8	*/
	9
	10	#ifndef O2CLUSTER_TCP_H
	11	#define O2CLUSTER_TCP_H
	12
	13	#include <linux/socket.h>
	14	#ifdef __KERNEL__
	15	#include <net/sock.h>
	16	#include <linux/tcp.h>
	17	#else
	18	#include <sys/socket.h>
	19	#endif
	20	#include <linux/inet.h>
	21	#include <linux/in.h>
	22
	23	struct o2net_msg
	24	{
	25	__be16 magic;
	26	__be16 data_len;
	27	__be16 msg_type;
	28	__be16 pad1;
	29	__be32 sys_status;
	30	__be32 status;
	31	__be32 key;
	32	__be32 msg_num;
fa803cf8	33	__u8 buf[];
98211489 ZB	34	};
98211489 ZB	35
d74c9803 KH	36	typedef int (o2net_msg_handler_func)(struct o2net_msg msg, u32 len, void data,
	37	void **ret_data);
	38	typedef void (o2net_post_msg_handler_func)(int status, void *data,
	39	void *ret_data);
98211489 ZB	40
	41	#define O2NET_MAX_PAYLOAD_BYTES (4096 - sizeof(struct o2net_msg))
	42
b5dd8030 JM	43	/* same as hb delay, we're waiting for another node to recognize our hb */
	44	#define O2NET_RECONNECT_DELAY_MS_DEFAULT 2000
	45
17104683 SM	46	#define O2NET_KEEPALIVE_DELAY_MS_DEFAULT 2000
17104683 SM	47	#define O2NET_IDLE_TIMEOUT_MS_DEFAULT 30000
b5dd8030	48
8e9801df	49	#define O2NET_TCP_USER_TIMEOUT 0x7fffffff
b5dd8030	50
98211489 ZB	51	/* TODO: figure this out.... */
	52	static inline int o2net_link_down(int err, struct socket *sock)
	53	{
	54	if (sock) {
	55	if (sock->sk->sk_state != TCP_ESTABLISHED &&
	56	sock->sk->sk_state != TCP_CLOSE_WAIT)
	57	return 1;
	58	}
	59
	60	if (err >= 0)
	61	return 0;
	62	switch (err) {
	63	/* ????????????????????????? */
	64	case -ERESTARTSYS:
	65	case -EBADF:
	66	/* When the server has died, an ICMP port unreachable
	67	* message prompts ECONNREFUSED. */
	68	case -ECONNREFUSED:
	69	case -ENOTCONN:
	70	case -ECONNRESET:
	71	case -EPIPE:
	72	return 1;
	73	}
	74	return 0;
	75	}
	76
	77	enum {
	78	O2NET_DRIVER_UNINITED,
	79	O2NET_DRIVER_READY,
	80	};
	81
98211489 ZB	82	int o2net_send_message(u32 msg_type, u32 key, void *data, u32 len,
	83	u8 target_node, int *status);
	84	int o2net_send_message_vec(u32 msg_type, u32 key, struct kvec *vec,
	85	size_t veclen, u8 target_node, int *status);
98211489 ZB	86
	87	int o2net_register_handler(u32 msg_type, u32 key, u32 max_len,
	88	o2net_msg_handler_func func, void data,
d74c9803	89	o2net_post_msg_handler_func *post_func,
98211489 ZB	90	struct list_head *unreg_list);
	91	void o2net_unregister_handler_list(struct list_head *list);
	92
3ba169cc SM	93	void o2net_fill_node_map(unsigned long *map, unsigned bytes);
3ba169cc SM	94
98211489 ZB	95	struct o2nm_node;
	96	int o2net_register_hb_callbacks(void);
	97	void o2net_unregister_hb_callbacks(void);
	98	int o2net_start_listening(struct o2nm_node *node);
	99	void o2net_stop_listening(struct o2nm_node *node);
	100	void o2net_disconnect_node(struct o2nm_node *node);
828ae6af	101	int o2net_num_connected_peers(void);
98211489 ZB	102
	103	int o2net_init(void);
	104	void o2net_exit(void);
98211489	105
2309e9e0 SM	106	struct o2net_send_tracking;
	107	struct o2net_sock_container;
	108
	109	#ifdef CONFIG_DEBUG_FS
e581595e	110	void o2net_debugfs_init(void);
2309e9e0 SM	111	void o2net_debugfs_exit(void);
	112	void o2net_debug_add_nst(struct o2net_send_tracking *nst);
	113	void o2net_debug_del_nst(struct o2net_send_tracking *nst);
	114	void o2net_debug_add_sc(struct o2net_sock_container *sc);
	115	void o2net_debug_del_sc(struct o2net_sock_container *sc);
	116	#else
e581595e	117	static inline void o2net_debugfs_init(void)
2309e9e0	118	{
2309e9e0	119	}
271d772d	120	static inline void o2net_debugfs_exit(void)
2309e9e0 SM	121	{
2309e9e0 SM	122	}
271d772d	123	static inline void o2net_debug_add_nst(struct o2net_send_tracking *nst)
2309e9e0 SM	124	{
2309e9e0 SM	125	}
271d772d	126	static inline void o2net_debug_del_nst(struct o2net_send_tracking *nst)
2309e9e0 SM	127	{
2309e9e0 SM	128	}
271d772d	129	static inline void o2net_debug_add_sc(struct o2net_sock_container *sc)
2309e9e0 SM	130	{
2309e9e0 SM	131	}
271d772d	132	static inline void o2net_debug_del_sc(struct o2net_sock_container *sc)
2309e9e0 SM	133	{
	134	}
	135	#endif /* CONFIG_DEBUG_FS */
	136
98211489	137	#endif /* O2CLUSTER_TCP_H */