1b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer/* -*- mode: c; c-basic-offset: 8; -*- 2b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * vim: noexpandtab sw=8 ts=8 sts=0: 3b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * 4b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * heartbeat.h 5b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * 6b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * Function prototypes 7b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * 8b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * Copyright (C) 2004 Oracle. All rights reserved. 9b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * 10b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * This program is free software; you can redistribute it and/or 11b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * modify it under the terms of the GNU General Public 12b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * License as published by the Free Software Foundation; either 13b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * version 2 of the License, or (at your option) any later version. 14b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * 15b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * This program is distributed in the hope that it will be useful, 16b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * but WITHOUT ANY WARRANTY; without even the implied warranty of 17b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * General Public License for more details. 19b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * 20b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * You should have received a copy of the GNU General Public 21b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * License along with this program; if not, write to the 22b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * Boston, MA 021110-1307, USA. 24b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer * 25b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer */ 26b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 27b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer#ifndef R2CLUSTER_HEARTBEAT_H 28b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer#define R2CLUSTER_HEARTBEAT_H 29b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 30b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer#define R2HB_REGION_TIMEOUT_MS 2000 31b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 32b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer#define R2HB_MAX_REGION_NAME_LEN 32 33b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 34b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer/* number of changes to be seen as live */ 35b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer#define R2HB_LIVE_THRESHOLD 2 36b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer/* number of equal samples to be seen as dead */ 37b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimerextern unsigned int r2hb_dead_threshold; 38b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer#define R2HB_DEFAULT_DEAD_THRESHOLD 31 39b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer/* Otherwise MAX_WRITE_TIMEOUT will be zero... */ 40b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer#define R2HB_MIN_DEAD_THRESHOLD 2 41b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer#define R2HB_MAX_WRITE_TIMEOUT_MS \ 42b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer (R2HB_REGION_TIMEOUT_MS * (r2hb_dead_threshold - 1)) 43b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 44b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer#define R2HB_CB_MAGIC 0x51d1e4ec 45b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 46b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer/* callback stuff */ 47b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimerenum r2hb_callback_type { 48b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer R2HB_NODE_DOWN_CB = 0, 49b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer R2HB_NODE_UP_CB, 50b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer R2HB_NUM_CB 51b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer}; 52b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 53b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimerstruct r2nm_node; 54b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimertypedef void (r2hb_cb_func)(struct r2nm_node *, int, void *); 55b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 56b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimerstruct r2hb_callback_func { 57b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer u32 hc_magic; 58b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer struct list_head hc_item; 59b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer r2hb_cb_func *hc_func; 60b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer void *hc_data; 61b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer int hc_priority; 62b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer enum r2hb_callback_type hc_type; 63b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer}; 64b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 65b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimerstruct config_group *r2hb_alloc_hb_set(void); 66b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimervoid r2hb_free_hb_set(struct config_group *group); 67b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 68b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimervoid r2hb_setup_callback(struct r2hb_callback_func *hc, 69b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer enum r2hb_callback_type type, 70b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer r2hb_cb_func *func, 71b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer void *data, 72b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer int priority); 73b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimerint r2hb_register_callback(const char *region_uuid, 74b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer struct r2hb_callback_func *hc); 75b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimervoid r2hb_unregister_callback(const char *region_uuid, 76b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer struct r2hb_callback_func *hc); 77b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimervoid r2hb_fill_node_map(unsigned long *map, 78b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer unsigned bytes); 79b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimervoid r2hb_exit(void); 80b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimerint r2hb_init(void); 81b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimerint r2hb_check_node_heartbeating_from_callback(u8 node_num); 82b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimervoid r2hb_stop_all_regions(void); 83b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimerint r2hb_get_all_regions(char *region_uuids, u8 numregions); 84b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimerint r2hb_global_heartbeat_active(void); 85b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimervoid r2hb_manual_set_node_heartbeating(int); 86b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer 87b605c9621e57e72cbd45d59fd93d97b4a75c3597Dan Magenheimer#endif /* R2CLUSTER_HEARTBEAT_H */ 88