/*
   * net/tipc/monitor.h
   *
   * Copyright (c) 2015, Ericsson AB
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the names of the copyright holders nor the names of its
   *    contributors may be used to endorse or promote products derived from
   *    this software without specific prior written permission.
   *
   * Alternatively, this software may be distributed under the terms of the
   * GNU General Public License ("GPL") version 2 as published by the Free
   * Software Foundation.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef _TIPC_MONITOR_H
  #define _TIPC_MONITOR_H

  #include "netlink.h"

  /* struct tipc_mon_state: link instance's cache of monitor list and domain state
   * @list_gen: current generation of this node's monitor list
   * @gen: current generation of this node's local domain
   * @peer_gen: most recent domain generation received from peer
   * @acked_gen: most recent generation of self's domain acked by peer
   * @monitoring: this peer endpoint should continuously monitored
   * @probing: peer endpoint should be temporarily probed for potential loss
   * @synched: domain record's generation has been synched with peer after reset
   */
  struct tipc_mon_state {
  	u16 list_gen;
  	u16 peer_gen;
  	u16 acked_gen;
  	bool monitoring :1;
  	bool probing    :1;
  	bool reset      :1;
  	bool synched    :1;
  };
  
  int tipc_mon_create(struct net *net, int bearer_id);
  void tipc_mon_delete(struct net *net, int bearer_id);
  
  void tipc_mon_peer_up(struct net *net, u32 addr, int bearer_id);
  void tipc_mon_peer_down(struct net *net, u32 addr, int bearer_id);
  void tipc_mon_prep(struct net *net, void *data, int *dlen,
  		   struct tipc_mon_state *state, int bearer_id);
  void tipc_mon_rcv(struct net *net, void *data, u16 dlen, u32 addr,
  		  struct tipc_mon_state *state, int bearer_id);
  void tipc_mon_get_state(struct net *net, u32 addr,
  			struct tipc_mon_state *state,
  			int bearer_id);
  void tipc_mon_remove_peer(struct net *net, u32 addr, int bearer_id);

  int tipc_nl_monitor_set_threshold(struct net *net, u32 cluster_size);

  int tipc_nl_monitor_get_threshold(struct net *net);

  int __tipc_nl_add_monitor(struct net *net, struct tipc_nl_msg *msg,
  			  u32 bearer_id);
  int tipc_nl_add_monitor_peer(struct net *net, struct tipc_nl_msg *msg,
  			     u32 bearer_id, u32 *prev_node);

  extern const int tipc_max_domain_size;
  #endif