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 */