1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
8 * Copyright (C) 2004 Oracle. All rights reserved.
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.
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.
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.
27 #ifndef R2CLUSTER_HEARTBEAT_H
28 #define R2CLUSTER_HEARTBEAT_H
30 #define R2HB_REGION_TIMEOUT_MS 2000
32 #define R2HB_MAX_REGION_NAME_LEN 32
34 /* number of changes to be seen as live */
35 #define R2HB_LIVE_THRESHOLD 2
36 /* number of equal samples to be seen as dead */
37 extern unsigned int r2hb_dead_threshold;
38 #define R2HB_DEFAULT_DEAD_THRESHOLD 31
39 /* Otherwise MAX_WRITE_TIMEOUT will be zero... */
40 #define R2HB_MIN_DEAD_THRESHOLD 2
41 #define R2HB_MAX_WRITE_TIMEOUT_MS \
42 (R2HB_REGION_TIMEOUT_MS * (r2hb_dead_threshold - 1))
44 #define R2HB_CB_MAGIC 0x51d1e4ec
47 enum r2hb_callback_type {
48 R2HB_NODE_DOWN_CB = 0,
54 typedef void (r2hb_cb_func)(struct r2nm_node *, int, void *);
56 struct r2hb_callback_func {
58 struct list_head hc_item;
59 r2hb_cb_func *hc_func;
62 enum r2hb_callback_type hc_type;
65 struct config_group *r2hb_alloc_hb_set(void);
66 void r2hb_free_hb_set(struct config_group *group);
68 void r2hb_setup_callback(struct r2hb_callback_func *hc,
69 enum r2hb_callback_type type,
73 int r2hb_register_callback(const char *region_uuid,
74 struct r2hb_callback_func *hc);
75 void r2hb_unregister_callback(const char *region_uuid,
76 struct r2hb_callback_func *hc);
77 void r2hb_fill_node_map(unsigned long *map,
81 int r2hb_check_node_heartbeating_from_callback(u8 node_num);
82 void r2hb_stop_all_regions(void);
83 int r2hb_get_all_regions(char *region_uuids, u8 numregions);
84 int r2hb_global_heartbeat_active(void);
85 void r2hb_manual_set_node_heartbeating(int);
87 #endif /* R2CLUSTER_HEARTBEAT_H */