a7f6a5fb4b
Disk based heartbeat. Configured and started from userspace, the kernel component handles I/O submission and event generation via callback mechanism. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* heartbeat.h
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*
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* Function prototypes
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*
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* Copyright (C) 2004 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*
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*/
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#ifndef O2CLUSTER_HEARTBEAT_H
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#define O2CLUSTER_HEARTBEAT_H
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#include "ocfs2_heartbeat.h"
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#define O2HB_REGION_TIMEOUT_MS 2000
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/* number of changes to be seen as live */
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#define O2HB_LIVE_THRESHOLD 2
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/* number of equal samples to be seen as dead */
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extern unsigned int o2hb_dead_threshold;
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#define O2HB_DEFAULT_DEAD_THRESHOLD 7
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/* Otherwise MAX_WRITE_TIMEOUT will be zero... */
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#define O2HB_MIN_DEAD_THRESHOLD 2
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#define O2HB_MAX_WRITE_TIMEOUT_MS (O2HB_REGION_TIMEOUT_MS * (o2hb_dead_threshold - 1))
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#define O2HB_CB_MAGIC 0x51d1e4ec
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/* callback stuff */
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enum o2hb_callback_type {
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O2HB_NODE_DOWN_CB = 0,
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O2HB_NODE_UP_CB,
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O2HB_NUM_CB
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};
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struct o2nm_node;
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typedef void (o2hb_cb_func)(struct o2nm_node *, int, void *);
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struct o2hb_callback_func {
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u32 hc_magic;
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struct list_head hc_item;
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o2hb_cb_func *hc_func;
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void *hc_data;
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int hc_priority;
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enum o2hb_callback_type hc_type;
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};
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struct config_group *o2hb_alloc_hb_set(void);
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void o2hb_free_hb_set(struct config_group *group);
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void o2hb_setup_callback(struct o2hb_callback_func *hc,
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enum o2hb_callback_type type,
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o2hb_cb_func *func,
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void *data,
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int priority);
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int o2hb_register_callback(struct o2hb_callback_func *hc);
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int o2hb_unregister_callback(struct o2hb_callback_func *hc);
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void o2hb_fill_node_map(unsigned long *map,
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unsigned bytes);
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void o2hb_init(void);
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int o2hb_check_node_heartbeating(u8 node_num);
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int o2hb_check_node_heartbeating_from_callback(u8 node_num);
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int o2hb_check_local_node_heartbeating(void);
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void o2hb_stop_all_regions(void);
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#endif /* O2CLUSTER_HEARTBEAT_H */
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