xref: /linux/fs/ocfs2/cluster/nodemanager.h (revision 8be98d2f2a0a262f8bf8a0bc1fdf522b3c7aab17)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * nodemanager.h
4  *
5  * Function prototypes
6  *
7  * Copyright (C) 2004 Oracle.  All rights reserved.
8  */
9 
10 #ifndef O2CLUSTER_NODEMANAGER_H
11 #define O2CLUSTER_NODEMANAGER_H
12 
13 #include "ocfs2_nodemanager.h"
14 
15 /* This totally doesn't belong here. */
16 #include <linux/configfs.h>
17 #include <linux/rbtree.h>
18 
19 enum o2nm_fence_method {
20 	O2NM_FENCE_RESET	= 0,
21 	O2NM_FENCE_PANIC,
22 	O2NM_FENCE_METHODS,	/* Number of fence methods */
23 };
24 
25 struct o2nm_node {
26 	spinlock_t		nd_lock;
27 	struct config_item	nd_item;
28 	char			nd_name[O2NM_MAX_NAME_LEN+1]; /* replace? */
29 	__u8			nd_num;
30 	/* only one address per node, as attributes, for now. */
31 	__be32			nd_ipv4_address;
32 	__be16			nd_ipv4_port;
33 	struct rb_node		nd_ip_node;
34 	/* there can be only one local node for now */
35 	int			nd_local;
36 
37 	unsigned long		nd_set_attributes;
38 };
39 
40 struct o2nm_cluster {
41 	struct config_group	cl_group;
42 	unsigned		cl_has_local:1;
43 	u8			cl_local_node;
44 	rwlock_t		cl_nodes_lock;
45 	struct o2nm_node  	*cl_nodes[O2NM_MAX_NODES];
46 	struct rb_root		cl_node_ip_tree;
47 	unsigned int		cl_idle_timeout_ms;
48 	unsigned int		cl_keepalive_delay_ms;
49 	unsigned int		cl_reconnect_delay_ms;
50 	enum o2nm_fence_method	cl_fence_method;
51 
52 	/* this bitmap is part of a hack for disk bitmap.. will go eventually. - zab */
53 	unsigned long	cl_nodes_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
54 };
55 
56 extern struct o2nm_cluster *o2nm_single_cluster;
57 
58 u8 o2nm_this_node(void);
59 
60 int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
61 struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
62 struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
63 void o2nm_node_get(struct o2nm_node *node);
64 void o2nm_node_put(struct o2nm_node *node);
65 
66 int o2nm_depend_item(struct config_item *item);
67 void o2nm_undepend_item(struct config_item *item);
68 int o2nm_depend_this_node(void);
69 void o2nm_undepend_this_node(void);
70 
71 #endif /* O2CLUSTER_NODEMANAGER_H */
72