/* -*- mode: c; c-basic-offset: 8; -*-
   * vim: noexpandtab sw=8 ts=8 sts=0:
   *
   * nodemanager.h
   *
   * Function prototypes
   *
   * Copyright (C) 2004 Oracle.  All rights reserved.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public
   * License as published by the Free Software Foundation; either
   * version 2 of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public
   * License along with this program; if not, write to the
   * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   * Boston, MA 021110-1307, USA.
   *
   */
  
  #ifndef O2CLUSTER_NODEMANAGER_H
  #define O2CLUSTER_NODEMANAGER_H
  
  #include "ocfs2_nodemanager.h"
  
  /* This totally doesn't belong here. */
  #include <linux/configfs.h>
  #include <linux/rbtree.h>
  
  enum o2nm_fence_method {
  	O2NM_FENCE_RESET	= 0,
  	O2NM_FENCE_PANIC,
  	O2NM_FENCE_METHODS,	/* Number of fence methods */
  };
  
  struct o2nm_node {
  	spinlock_t		nd_lock;
  	struct config_item	nd_item;
  	char			nd_name[O2NM_MAX_NAME_LEN+1]; /* replace? */
  	__u8			nd_num;
  	/* only one address per node, as attributes, for now. */
  	__be32			nd_ipv4_address;
  	__be16			nd_ipv4_port;
  	struct rb_node		nd_ip_node;
  	/* there can be only one local node for now */
  	int			nd_local;
  
  	unsigned long		nd_set_attributes;
  };
  
  struct o2nm_cluster {
  	struct config_group	cl_group;
  	unsigned		cl_has_local:1;
  	u8			cl_local_node;
  	rwlock_t		cl_nodes_lock;
  	struct o2nm_node  	*cl_nodes[O2NM_MAX_NODES];
  	struct rb_root		cl_node_ip_tree;
  	unsigned int		cl_idle_timeout_ms;
  	unsigned int		cl_keepalive_delay_ms;
  	unsigned int		cl_reconnect_delay_ms;
  	enum o2nm_fence_method	cl_fence_method;
  
  	/* this bitmap is part of a hack for disk bitmap.. will go eventually. - zab */
  	unsigned long	cl_nodes_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
  };
  
  extern struct o2nm_cluster *o2nm_single_cluster;
  
  u8 o2nm_this_node(void);
  
  int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
  struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
  struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
  void o2nm_node_get(struct o2nm_node *node);
  void o2nm_node_put(struct o2nm_node *node);
  
  int o2nm_depend_item(struct config_item *item);
  void o2nm_undepend_item(struct config_item *item);
  int o2nm_depend_this_node(void);
  void o2nm_undepend_this_node(void);
  
  #endif /* O2CLUSTER_NODEMANAGER_H */