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 /* number of changes to be seen as live */ 35 #define O2HB_LIVE_THRESHOLD 2 36 /* number of equal samples to be seen as dead */ 37 extern unsigned int o2hb_dead_threshold; 38 #define O2HB_DEFAULT_DEAD_THRESHOLD 31 39 /* Otherwise MAX_WRITE_TIMEOUT will be zero... */ 40 #define O2HB_MIN_DEAD_THRESHOLD 2 41 #define O2HB_MAX_WRITE_TIMEOUT_MS (O2HB_REGION_TIMEOUT_MS * (o2hb_dead_threshold - 1)) 42 43 #define O2HB_CB_MAGIC 0x51d1e4ec 44 45 /* callback stuff */ 46 enum o2hb_callback_type { 47 O2HB_NODE_DOWN_CB = 0, 48 O2HB_NODE_UP_CB, 49 O2HB_NUM_CB 50 }; 51 52 struct o2nm_node; 53 typedef void (o2hb_cb_func)(struct o2nm_node *, int, void *); 54 55 struct o2hb_callback_func { 56 u32 hc_magic; 57 struct list_head hc_item; 58 o2hb_cb_func *hc_func; 59 void *hc_data; 60 int hc_priority; 61 enum o2hb_callback_type hc_type; 62 }; 63 64 struct config_group *o2hb_alloc_hb_set(void); 65 void o2hb_free_hb_set(struct config_group *group); 66 67 void o2hb_setup_callback(struct o2hb_callback_func *hc, 68 enum o2hb_callback_type type, 69 o2hb_cb_func *func, 70 void *data, 71 int priority); 72 int o2hb_register_callback(const char *region_uuid, 73 struct o2hb_callback_func *hc); 74 void o2hb_unregister_callback(const char *region_uuid, 75 struct o2hb_callback_func *hc); 76 void o2hb_fill_node_map(unsigned long *map, 77 unsigned bytes); 78 void o2hb_exit(void); 79 int o2hb_init(void); 80 int o2hb_check_node_heartbeating(u8 node_num); 81 int o2hb_check_node_heartbeating_from_callback(u8 node_num); 82 int o2hb_check_local_node_heartbeating(void); 83 void o2hb_stop_all_regions(void); 84 85 #endif /* O2CLUSTER_HEARTBEAT_H */ 86