Merge tag 'selinux-pr-20190702' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-2.6-microblaze.git] / fs / ocfs2 / cluster / nodemanager.h
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* -*- mode: c; c-basic-offset: 8; -*-
3  * vim: noexpandtab sw=8 ts=8 sts=0:
4  *
5  * nodemanager.h
6  *
7  * Function prototypes
8  *
9  * Copyright (C) 2004 Oracle.  All rights reserved.
10  */
11
12 #ifndef O2CLUSTER_NODEMANAGER_H
13 #define O2CLUSTER_NODEMANAGER_H
14
15 #include "ocfs2_nodemanager.h"
16
17 /* This totally doesn't belong here. */
18 #include <linux/configfs.h>
19 #include <linux/rbtree.h>
20
21 enum o2nm_fence_method {
22         O2NM_FENCE_RESET        = 0,
23         O2NM_FENCE_PANIC,
24         O2NM_FENCE_METHODS,     /* Number of fence methods */
25 };
26
27 struct o2nm_node {
28         spinlock_t              nd_lock;
29         struct config_item      nd_item;
30         char                    nd_name[O2NM_MAX_NAME_LEN+1]; /* replace? */
31         __u8                    nd_num;
32         /* only one address per node, as attributes, for now. */
33         __be32                  nd_ipv4_address;
34         __be16                  nd_ipv4_port;
35         struct rb_node          nd_ip_node;
36         /* there can be only one local node for now */
37         int                     nd_local;
38
39         unsigned long           nd_set_attributes;
40 };
41
42 struct o2nm_cluster {
43         struct config_group     cl_group;
44         unsigned                cl_has_local:1;
45         u8                      cl_local_node;
46         rwlock_t                cl_nodes_lock;
47         struct o2nm_node        *cl_nodes[O2NM_MAX_NODES];
48         struct rb_root          cl_node_ip_tree;
49         unsigned int            cl_idle_timeout_ms;
50         unsigned int            cl_keepalive_delay_ms;
51         unsigned int            cl_reconnect_delay_ms;
52         enum o2nm_fence_method  cl_fence_method;
53
54         /* this bitmap is part of a hack for disk bitmap.. will go eventually. - zab */
55         unsigned long   cl_nodes_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
56 };
57
58 extern struct o2nm_cluster *o2nm_single_cluster;
59
60 u8 o2nm_this_node(void);
61
62 int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
63 struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
64 struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
65 void o2nm_node_get(struct o2nm_node *node);
66 void o2nm_node_put(struct o2nm_node *node);
67
68 int o2nm_depend_item(struct config_item *item);
69 void o2nm_undepend_item(struct config_item *item);
70 int o2nm_depend_this_node(void);
71 void o2nm_undepend_this_node(void);
72
73 #endif /* O2CLUSTER_NODEMANAGER_H */