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
19enum o2nm_fence_method {
20 O2NM_FENCE_RESET = 0,
21 O2NM_FENCE_PANIC,
22 O2NM_FENCE_METHODS, /* Number of fence methods */
23};
24
25struct 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
40struct 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
56extern struct o2nm_cluster *o2nm_single_cluster;
57
58u8 o2nm_this_node(void);
59
60int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
61struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
62struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
63void o2nm_node_get(struct o2nm_node *node);
64void o2nm_node_put(struct o2nm_node *node);
65
66int o2nm_depend_item(struct config_item *item);
67void o2nm_undepend_item(struct config_item *item);
68int o2nm_depend_this_node(void);
69void o2nm_undepend_this_node(void);
70
71#endif /* O2CLUSTER_NODEMANAGER_H */
72

source code of linux/fs/ocfs2/cluster/nodemanager.h