1328970deSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-or-later */ 2fa60ce2cSMasahiro Yamada /* 3a7f6a5fbSMark Fasheh * heartbeat.h 4a7f6a5fbSMark Fasheh * 5a7f6a5fbSMark Fasheh * Function prototypes 6a7f6a5fbSMark Fasheh * 7a7f6a5fbSMark Fasheh * Copyright (C) 2004 Oracle. All rights reserved. 8a7f6a5fbSMark Fasheh */ 9a7f6a5fbSMark Fasheh 10a7f6a5fbSMark Fasheh #ifndef O2CLUSTER_HEARTBEAT_H 11a7f6a5fbSMark Fasheh #define O2CLUSTER_HEARTBEAT_H 12a7f6a5fbSMark Fasheh 13a7f6a5fbSMark Fasheh #include "ocfs2_heartbeat.h" 14a7f6a5fbSMark Fasheh 15a7f6a5fbSMark Fasheh #define O2HB_REGION_TIMEOUT_MS 2000 16a7f6a5fbSMark Fasheh 17b3c85c4cSSunil Mushran #define O2HB_MAX_REGION_NAME_LEN 32 18b3c85c4cSSunil Mushran 19a7f6a5fbSMark Fasheh /* number of changes to be seen as live */ 20a7f6a5fbSMark Fasheh #define O2HB_LIVE_THRESHOLD 2 21a7f6a5fbSMark Fasheh /* number of equal samples to be seen as dead */ 22a7f6a5fbSMark Fasheh extern unsigned int o2hb_dead_threshold; 2317104683SSunil Mushran #define O2HB_DEFAULT_DEAD_THRESHOLD 31 24a7f6a5fbSMark Fasheh /* Otherwise MAX_WRITE_TIMEOUT will be zero... */ 25a7f6a5fbSMark Fasheh #define O2HB_MIN_DEAD_THRESHOLD 2 26a7f6a5fbSMark Fasheh #define O2HB_MAX_WRITE_TIMEOUT_MS (O2HB_REGION_TIMEOUT_MS * (o2hb_dead_threshold - 1)) 27a7f6a5fbSMark Fasheh 28a7f6a5fbSMark Fasheh #define O2HB_CB_MAGIC 0x51d1e4ec 29a7f6a5fbSMark Fasheh 30a7f6a5fbSMark Fasheh /* callback stuff */ 31a7f6a5fbSMark Fasheh enum o2hb_callback_type { 32a7f6a5fbSMark Fasheh O2HB_NODE_DOWN_CB = 0, 33a7f6a5fbSMark Fasheh O2HB_NODE_UP_CB, 34a7f6a5fbSMark Fasheh O2HB_NUM_CB 35a7f6a5fbSMark Fasheh }; 36a7f6a5fbSMark Fasheh 37a7f6a5fbSMark Fasheh struct o2nm_node; 38a7f6a5fbSMark Fasheh typedef void (o2hb_cb_func)(struct o2nm_node *, int, void *); 39a7f6a5fbSMark Fasheh 40a7f6a5fbSMark Fasheh struct o2hb_callback_func { 41a7f6a5fbSMark Fasheh u32 hc_magic; 42a7f6a5fbSMark Fasheh struct list_head hc_item; 43a7f6a5fbSMark Fasheh o2hb_cb_func *hc_func; 44a7f6a5fbSMark Fasheh void *hc_data; 45a7f6a5fbSMark Fasheh int hc_priority; 46a7f6a5fbSMark Fasheh enum o2hb_callback_type hc_type; 47a7f6a5fbSMark Fasheh }; 48a7f6a5fbSMark Fasheh 49a7f6a5fbSMark Fasheh struct config_group *o2hb_alloc_hb_set(void); 50a7f6a5fbSMark Fasheh void o2hb_free_hb_set(struct config_group *group); 51a7f6a5fbSMark Fasheh 52a7f6a5fbSMark Fasheh void o2hb_setup_callback(struct o2hb_callback_func *hc, 53a7f6a5fbSMark Fasheh enum o2hb_callback_type type, 54a7f6a5fbSMark Fasheh o2hb_cb_func *func, 55a7f6a5fbSMark Fasheh void *data, 56a7f6a5fbSMark Fasheh int priority); 5714829422SJoel Becker int o2hb_register_callback(const char *region_uuid, 5814829422SJoel Becker struct o2hb_callback_func *hc); 5914829422SJoel Becker void o2hb_unregister_callback(const char *region_uuid, 6014829422SJoel Becker struct o2hb_callback_func *hc); 61a7f6a5fbSMark Fasheh void o2hb_fill_node_map(unsigned long *map, 62*6d4a93b6SJoseph Qi unsigned int bits); 6387d3d3f3SSunil Mushran void o2hb_exit(void); 64e581595eSGreg Kroah-Hartman void o2hb_init(void); 6570e82a12SJoseph Qi int o2hb_check_node_heartbeating_no_sem(u8 node_num); 66a7f6a5fbSMark Fasheh int o2hb_check_node_heartbeating_from_callback(u8 node_num); 67a7f6a5fbSMark Fasheh void o2hb_stop_all_regions(void); 68b3c85c4cSSunil Mushran int o2hb_get_all_regions(char *region_uuids, u8 numregions); 69b3c85c4cSSunil Mushran int o2hb_global_heartbeat_active(void); 70a7f6a5fbSMark Fasheh 71a7f6a5fbSMark Fasheh #endif /* O2CLUSTER_HEARTBEAT_H */ 72