1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * heartbeat.h 5 * 6 * Function prototypes 7 * 8 * Copyright (C) 2004 Oracle. All rights reserved. 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public 12 * License as published by the Free Software Foundation; either 13 * version 2 of the License, or (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public 21 * License along with this program; if not, write to the 22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 23 * Boston, MA 021110-1307, USA. 24 * 25 */ 26 27 #ifndef O2CLUSTER_HEARTBEAT_H 28 #define O2CLUSTER_HEARTBEAT_H 29 30 #include "ocfs2_heartbeat.h" 31 32 #define O2HB_REGION_TIMEOUT_MS 2000 33 34 #define O2HB_MAX_REGION_NAME_LEN 32 35 36 /* number of changes to be seen as live */ 37 #define O2HB_LIVE_THRESHOLD 2 38 /* number of equal samples to be seen as dead */ 39 extern unsigned int o2hb_dead_threshold; 40 #define O2HB_DEFAULT_DEAD_THRESHOLD 31 41 /* Otherwise MAX_WRITE_TIMEOUT will be zero... */ 42 #define O2HB_MIN_DEAD_THRESHOLD 2 43 #define O2HB_MAX_WRITE_TIMEOUT_MS (O2HB_REGION_TIMEOUT_MS * (o2hb_dead_threshold - 1)) 44 45 #define O2HB_CB_MAGIC 0x51d1e4ec 46 47 /* callback stuff */ 48 enum o2hb_callback_type { 49 O2HB_NODE_DOWN_CB = 0, 50 O2HB_NODE_UP_CB, 51 O2HB_NUM_CB 52 }; 53 54 struct o2nm_node; 55 typedef void (o2hb_cb_func)(struct o2nm_node *, int, void *); 56 57 struct o2hb_callback_func { 58 u32 hc_magic; 59 struct list_head hc_item; 60 o2hb_cb_func *hc_func; 61 void *hc_data; 62 int hc_priority; 63 enum o2hb_callback_type hc_type; 64 }; 65 66 struct config_group *o2hb_alloc_hb_set(void); 67 void o2hb_free_hb_set(struct config_group *group); 68 69 void o2hb_setup_callback(struct o2hb_callback_func *hc, 70 enum o2hb_callback_type type, 71 o2hb_cb_func *func, 72 void *data, 73 int priority); 74 int o2hb_register_callback(const char *region_uuid, 75 struct o2hb_callback_func *hc); 76 void o2hb_unregister_callback(const char *region_uuid, 77 struct o2hb_callback_func *hc); 78 void o2hb_fill_node_map(unsigned long *map, 79 unsigned bytes); 80 void o2hb_exit(void); 81 int o2hb_init(void); 82 int o2hb_check_node_heartbeating(u8 node_num); 83 int o2hb_check_node_heartbeating_from_callback(u8 node_num); 84 int o2hb_check_local_node_heartbeating(void); 85 void o2hb_stop_all_regions(void); 86 int o2hb_get_all_regions(char *region_uuids, u8 numregions); 87 int o2hb_global_heartbeat_active(void); 88 89 #endif /* O2CLUSTER_HEARTBEAT_H */ 90