1 /* -*- mode: c; c-basic-offset: 8; -*-
2  * vim: noexpandtab sw=8 ts=8 sts=0:
3  *
4  * nodemanager.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_NODEMANAGER_H
28 #define O2CLUSTER_NODEMANAGER_H
29 
30 #include "ocfs2_nodemanager.h"
31 
32 /* This totally doesn't belong here. */
33 #include <linux/configfs.h>
34 #include <linux/rbtree.h>
35 
36 enum o2nm_fence_method {
37 	O2NM_FENCE_RESET	= 0,
38 	O2NM_FENCE_PANIC,
39 	O2NM_FENCE_METHODS,	/* Number of fence methods */
40 };
41 
42 struct o2nm_node {
43 	spinlock_t		nd_lock;
44 	struct config_item	nd_item;
45 	char			nd_name[O2NM_MAX_NAME_LEN+1]; /* replace? */
46 	__u8			nd_num;
47 	/* only one address per node, as attributes, for now. */
48 	__be32			nd_ipv4_address;
49 	__be16			nd_ipv4_port;
50 	struct rb_node		nd_ip_node;
51 	/* there can be only one local node for now */
52 	int			nd_local;
53 
54 	unsigned long		nd_set_attributes;
55 };
56 
57 struct o2nm_cluster {
58 	struct config_group	cl_group;
59 	unsigned		cl_has_local:1;
60 	u8			cl_local_node;
61 	rwlock_t		cl_nodes_lock;
62 	struct o2nm_node  	*cl_nodes[O2NM_MAX_NODES];
63 	struct rb_root		cl_node_ip_tree;
64 	unsigned int		cl_idle_timeout_ms;
65 	unsigned int		cl_keepalive_delay_ms;
66 	unsigned int		cl_reconnect_delay_ms;
67 	enum o2nm_fence_method	cl_fence_method;
68 
69 	/* this bitmap is part of a hack for disk bitmap.. will go eventually. - zab */
70 	unsigned long	cl_nodes_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
71 };
72 
73 extern struct o2nm_cluster *o2nm_single_cluster;
74 
75 u8 o2nm_this_node(void);
76 
77 int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
78 struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
79 struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
80 void o2nm_node_get(struct o2nm_node *node);
81 void o2nm_node_put(struct o2nm_node *node);
82 
83 int o2nm_depend_item(struct config_item *item);
84 void o2nm_undepend_item(struct config_item *item);
85 int o2nm_depend_this_node(void);
86 void o2nm_undepend_this_node(void);
87 
88 #endif /* O2CLUSTER_NODEMANAGER_H */
89