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/fs/ocfs2/cluster/nodemanager.h

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C Header | 88 lines | 46 code | 13 blank | 29 comment | 0 complexity | 8a32275a93c68f7e8cd04c66d9ef2d4b MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
 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
36enum o2nm_fence_method {
37	O2NM_FENCE_RESET	= 0,
38	O2NM_FENCE_PANIC,
39	O2NM_FENCE_METHODS,	/* Number of fence methods */
40};
41
42struct 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
57struct 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
73extern struct o2nm_cluster *o2nm_single_cluster;
74
75u8 o2nm_this_node(void);
76
77int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
78struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
79struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
80void o2nm_node_get(struct o2nm_node *node);
81void o2nm_node_put(struct o2nm_node *node);
82
83int o2nm_depend_item(struct config_item *item);
84void o2nm_undepend_item(struct config_item *item);
85int o2nm_depend_this_node(void);
86void o2nm_undepend_this_node(void);
87
88#endif /* O2CLUSTER_NODEMANAGER_H */