LXR linux/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
  36enum o2nm_fence_method {
  37        O2NM_FENCE_RESET        = 0,
  38        O2NM_FENCE_PANIC,
  39        O2NM_FENCE_METHODS,     /* Number of fence methods */
  40};
  41
  42struct 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
  57struct 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
  73extern struct o2nm_cluster *o2nm_single_cluster;
  74
  75u8 o2nm_this_node(void);
  76
  77int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
  78struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
  79struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
  80void o2nm_node_get(struct o2nm_node *node);
  81void o2nm_node_put(struct o2nm_node *node);
  82
  83int o2nm_depend_item(struct config_item *item);
  84void o2nm_undepend_item(struct config_item *item);
  85int o2nm_depend_this_node(void);
  86void o2nm_undepend_this_node(void);
  87
  88#endif /* O2CLUSTER_NODEMANAGER_H */
  89