heartbeat.h (1922B)
1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * heartbeat.h 4 * 5 * Function prototypes 6 * 7 * Copyright (C) 2004 Oracle. All rights reserved. 8 */ 9 10#ifndef O2CLUSTER_HEARTBEAT_H 11#define O2CLUSTER_HEARTBEAT_H 12 13#include "ocfs2_heartbeat.h" 14 15#define O2HB_REGION_TIMEOUT_MS 2000 16 17#define O2HB_MAX_REGION_NAME_LEN 32 18 19/* number of changes to be seen as live */ 20#define O2HB_LIVE_THRESHOLD 2 21/* number of equal samples to be seen as dead */ 22extern unsigned int o2hb_dead_threshold; 23#define O2HB_DEFAULT_DEAD_THRESHOLD 31 24/* Otherwise MAX_WRITE_TIMEOUT will be zero... */ 25#define O2HB_MIN_DEAD_THRESHOLD 2 26#define O2HB_MAX_WRITE_TIMEOUT_MS (O2HB_REGION_TIMEOUT_MS * (o2hb_dead_threshold - 1)) 27 28#define O2HB_CB_MAGIC 0x51d1e4ec 29 30/* callback stuff */ 31enum o2hb_callback_type { 32 O2HB_NODE_DOWN_CB = 0, 33 O2HB_NODE_UP_CB, 34 O2HB_NUM_CB 35}; 36 37struct o2nm_node; 38typedef void (o2hb_cb_func)(struct o2nm_node *, int, void *); 39 40struct o2hb_callback_func { 41 u32 hc_magic; 42 struct list_head hc_item; 43 o2hb_cb_func *hc_func; 44 void *hc_data; 45 int hc_priority; 46 enum o2hb_callback_type hc_type; 47}; 48 49struct config_group *o2hb_alloc_hb_set(void); 50void o2hb_free_hb_set(struct config_group *group); 51 52void o2hb_setup_callback(struct o2hb_callback_func *hc, 53 enum o2hb_callback_type type, 54 o2hb_cb_func *func, 55 void *data, 56 int priority); 57int o2hb_register_callback(const char *region_uuid, 58 struct o2hb_callback_func *hc); 59void o2hb_unregister_callback(const char *region_uuid, 60 struct o2hb_callback_func *hc); 61void o2hb_fill_node_map(unsigned long *map, 62 unsigned bytes); 63void o2hb_exit(void); 64void o2hb_init(void); 65int o2hb_check_node_heartbeating_no_sem(u8 node_num); 66int o2hb_check_node_heartbeating_from_callback(u8 node_num); 67void o2hb_stop_all_regions(void); 68int o2hb_get_all_regions(char *region_uuids, u8 numregions); 69int o2hb_global_heartbeat_active(void); 70 71#endif /* O2CLUSTER_HEARTBEAT_H */