| Mark Fasheh | a7f6a5f | 2005-12-15 14:31:23 -0800 | [diff] [blame] | 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 7 |
| 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); |
| Joel Becker | 1482942 | 2007-06-14 21:40:49 -0700 | [diff] [blame] | 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); |
| Mark Fasheh | a7f6a5f | 2005-12-15 14:31:23 -0800 | [diff] [blame] | 76 | void o2hb_fill_node_map(unsigned long *map, |
| 77 | unsigned bytes); |
| 78 | void o2hb_init(void); |
| 79 | int o2hb_check_node_heartbeating(u8 node_num); |
| 80 | int o2hb_check_node_heartbeating_from_callback(u8 node_num); |
| 81 | int o2hb_check_local_node_heartbeating(void); |
| 82 | void o2hb_stop_all_regions(void); |
| 83 | |
| 84 | #endif /* O2CLUSTER_HEARTBEAT_H */ |