/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* tcp.h
*
* Function prototypes
*
* Copyright (C) 2004 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*
*/
#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[0];
};
typedef int (o2net_msg_handler_func)(struct o2net_msg *msg, u32 len, void *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 5000
#define O2NET_IDLE_TIMEOUT_MS_DEFAULT 10000
/* 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,
struct list_head *unreg_list);
void o2net_unregister_handler_list(struct list_head *list);
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);
#endif /* O2CLUSTER_TCP_H */
