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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* heartbeat.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_HEARTBEAT_H
#define O2CLUSTER_HEARTBEAT_H
#include "ocfs2_heartbeat.h"
#define O2HB_REGION_TIMEOUT_MS 2000
/* number of changes to be seen as live */
#define O2HB_LIVE_THRESHOLD 2
/* number of equal samples to be seen as dead */
extern unsigned int o2hb_dead_threshold;
#define O2HB_DEFAULT_DEAD_THRESHOLD 7
/* Otherwise MAX_WRITE_TIMEOUT will be zero... */
#define O2HB_MIN_DEAD_THRESHOLD 2
#define O2HB_MAX_WRITE_TIMEOUT_MS (O2HB_REGION_TIMEOUT_MS * (o2hb_dead_threshold - 1))
#define O2HB_CB_MAGIC 0x51d1e4ec
/* callback stuff */
enum o2hb_callback_type {
O2HB_NODE_DOWN_CB = 0,
O2HB_NODE_UP_CB,
O2HB_NUM_CB
};
struct o2nm_node;
typedef void (o2hb_cb_func)(struct o2nm_node *, int, void *);
struct o2hb_callback_func {
u32 hc_magic;
struct list_head hc_item;
o2hb_cb_func *hc_func;
void *hc_data;
int hc_priority;
enum o2hb_callback_type hc_type;
};
struct config_group *o2hb_alloc_hb_set(void);
void o2hb_free_hb_set(struct config_group *group);
void o2hb_setup_callback(struct o2hb_callback_func *hc,
enum o2hb_callback_type type,
o2hb_cb_func *func,
void *data,
int priority);
int o2hb_register_callback(struct o2hb_callback_func *hc);
void o2hb_unregister_callback(struct o2hb_callback_func *hc);
void o2hb_fill_node_map(unsigned long *map,
unsigned bytes);
void o2hb_init(void);
int o2hb_check_node_heartbeating(u8 node_num);
int o2hb_check_node_heartbeating_from_callback(u8 node_num);
int o2hb_check_local_node_heartbeating(void);
void o2hb_stop_all_regions(void);
#endif /* O2CLUSTER_HEARTBEAT_H */
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