1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
4 *
5 * nodemanager.h
6 *
7 * Function prototypes
8 *
9 * Copyright (C) 2004 Oracle.  All rights reserved.
10 */
11
12#ifndef O2CLUSTER_NODEMANAGER_H
13#define O2CLUSTER_NODEMANAGER_H
14
15#include "ocfs2_nodemanager.h"
16
17/* This totally doesn't belong here. */
18#include <linux/configfs.h>
19#include <linux/rbtree.h>
20
21enum o2nm_fence_method {
22	O2NM_FENCE_RESET	= 0,
23	O2NM_FENCE_PANIC,
24	O2NM_FENCE_METHODS,	/* Number of fence methods */
25};
26
27struct o2nm_node {
28	spinlock_t		nd_lock;
29	struct config_item	nd_item;
30	char			nd_name[O2NM_MAX_NAME_LEN+1]; /* replace? */
31	__u8			nd_num;
32	/* only one address per node, as attributes, for now. */
33	__be32			nd_ipv4_address;
34	__be16			nd_ipv4_port;
35	struct rb_node		nd_ip_node;
36	/* there can be only one local node for now */
37	int			nd_local;
38
39	unsigned long		nd_set_attributes;
40};
41
42struct o2nm_cluster {
43	struct config_group	cl_group;
44	unsigned		cl_has_local:1;
45	u8			cl_local_node;
46	rwlock_t		cl_nodes_lock;
47	struct o2nm_node  	*cl_nodes[O2NM_MAX_NODES];
48	struct rb_root		cl_node_ip_tree;
49	unsigned int		cl_idle_timeout_ms;
50	unsigned int		cl_keepalive_delay_ms;
51	unsigned int		cl_reconnect_delay_ms;
52	enum o2nm_fence_method	cl_fence_method;
53
54	/* this bitmap is part of a hack for disk bitmap.. will go eventually. - zab */
55	unsigned long	cl_nodes_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
56};
57
58extern struct o2nm_cluster *o2nm_single_cluster;
59
60u8 o2nm_this_node(void);
61
62int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
63struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
64struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
65void o2nm_node_get(struct o2nm_node *node);
66void o2nm_node_put(struct o2nm_node *node);
67
68int o2nm_depend_item(struct config_item *item);
69void o2nm_undepend_item(struct config_item *item);
70int o2nm_depend_this_node(void);
71void o2nm_undepend_this_node(void);
72
73#endif /* O2CLUSTER_NODEMANAGER_H */
74