1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * heartbeat.h 6 * 7 * Function prototypes 8 * 9 * Copyright (C) 2004 Oracle. All rights reserved. 10 */ 11 12 #ifndef O2CLUSTER_HEARTBEAT_H 13 #define O2CLUSTER_HEARTBEAT_H 14 15 #include "ocfs2_heartbeat.h" 16 17 #define O2HB_REGION_TIMEOUT_MS 2000 18 19 #define O2HB_MAX_REGION_NAME_LEN 32 20 21 /* number of changes to be seen as live */ 22 #define O2HB_LIVE_THRESHOLD 2 23 /* number of equal samples to be seen as dead */ 24 extern unsigned int o2hb_dead_threshold; 25 #define O2HB_DEFAULT_DEAD_THRESHOLD 31 26 /* Otherwise MAX_WRITE_TIMEOUT will be zero... */ 27 #define O2HB_MIN_DEAD_THRESHOLD 2 28 #define O2HB_MAX_WRITE_TIMEOUT_MS (O2HB_REGION_TIMEOUT_MS * (o2hb_dead_threshold - 1)) 29 30 #define O2HB_CB_MAGIC 0x51d1e4ec 31 32 /* callback stuff */ 33 enum o2hb_callback_type { 34 O2HB_NODE_DOWN_CB = 0, 35 O2HB_NODE_UP_CB, 36 O2HB_NUM_CB 37 }; 38 39 struct o2nm_node; 40 typedef void (o2hb_cb_func)(struct o2nm_node *, int, void *); 41 42 struct o2hb_callback_func { 43 u32 hc_magic; 44 struct list_head hc_item; 45 o2hb_cb_func *hc_func; 46 void *hc_data; 47 int hc_priority; 48 enum o2hb_callback_type hc_type; 49 }; 50 51 struct config_group *o2hb_alloc_hb_set(void); 52 void o2hb_free_hb_set(struct config_group *group); 53 54 void o2hb_setup_callback(struct o2hb_callback_func *hc, 55 enum o2hb_callback_type type, 56 o2hb_cb_func *func, 57 void *data, 58 int priority); 59 int o2hb_register_callback(const char *region_uuid, 60 struct o2hb_callback_func *hc); 61 void o2hb_unregister_callback(const char *region_uuid, 62 struct o2hb_callback_func *hc); 63 void o2hb_fill_node_map(unsigned long *map, 64 unsigned bytes); 65 void o2hb_exit(void); 66 void o2hb_init(void); 67 int o2hb_check_node_heartbeating_no_sem(u8 node_num); 68 int o2hb_check_node_heartbeating_from_callback(u8 node_num); 69 void o2hb_stop_all_regions(void); 70 int o2hb_get_all_regions(char *region_uuids, u8 numregions); 71 int o2hb_global_heartbeat_active(void); 72 73 #endif /* O2CLUSTER_HEARTBEAT_H */ 74