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