fs/ocfs2/cluster/nodemanager.h

   1 /* -*- mode: c; c-basic-offset: 8; -*-
   2  * vim: noexpandtab sw=8 ts=8 sts=0:
   3  *
   4  * nodemanager.h
   5  *
   6  * Function prototypes
   7  *
   8  * Copyright (C) 2004 Oracle.  All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2 of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public
  21  * License along with this program; if not, write to the
  22  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23  * Boston, MA 021110-1307, USA.
  24  *
  25  */
  26
  27 #ifndef O2CLUSTER_NODEMANAGER_H
  28 #define O2CLUSTER_NODEMANAGER_H
  29
  30 #include "ocfs2_nodemanager.h"
  31
  32 /* This totally doesn't belong here. */
  33 #include <linux/configfs.h>
  34 #include <linux/rbtree.h>
  35
  36 enum o2nm_fence_method {
  37         O2NM_FENCE_RESET        = 0,
  38         O2NM_FENCE_PANIC,
  39         O2NM_FENCE_METHODS,     /* Number of fence methods */
  40 };
  41
  42 struct o2nm_node {
  43         spinlock_t              nd_lock;
  44         struct config_item      nd_item;
  45         char                    nd_name[O2NM_MAX_NAME_LEN+1]; /* replace? */
  46         __u8                    nd_num;
  47         /* only one address per node, as attributes, for now. */
  48         __be32                  nd_ipv4_address;
  49         __be16                  nd_ipv4_port;
  50         struct rb_node          nd_ip_node;
  51         /* there can be only one local node for now */
  52         int                     nd_local;
  53
  54         unsigned long           nd_set_attributes;
  55 };
  56
  57 struct o2nm_cluster {
  58         struct config_group     cl_group;
  59         unsigned                cl_has_local:1;
  60         u8                      cl_local_node;
  61         rwlock_t                cl_nodes_lock;
  62         struct o2nm_node        *cl_nodes[O2NM_MAX_NODES];
  63         struct rb_root          cl_node_ip_tree;
  64         unsigned int            cl_idle_timeout_ms;
  65         unsigned int            cl_keepalive_delay_ms;
  66         unsigned int            cl_reconnect_delay_ms;
  67         enum o2nm_fence_method  cl_fence_method;
  68
  69         /* this bitmap is part of a hack for disk bitmap.. will go eventually. - zab */
  70         unsigned long   cl_nodes_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
  71 };
  72
  73 extern struct o2nm_cluster *o2nm_single_cluster;
  74
  75 u8 o2nm_this_node(void);
  76
  77 int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
  78 struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
  79 struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
  80 void o2nm_node_get(struct o2nm_node *node);
  81 void o2nm_node_put(struct o2nm_node *node);
  82
  83 int o2nm_depend_item(struct config_item *item);
  84 void o2nm_undepend_item(struct config_item *item);
  85 int o2nm_depend_this_node(void);
  86 void o2nm_undepend_this_node(void);
  87
  88 #endif /* O2CLUSTER_NODEMANAGER_H */