net/tipc/monitor.h

   1 /*
   2  * net/tipc/monitor.h
   3  *
   4  * Copyright (c) 2015, Ericsson AB
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the names of the copyright holders nor the names of its
  16  *    contributors may be used to endorse or promote products derived from
  17  *    this software without specific prior written permission.
  18  *
  19  * Alternatively, this software may be distributed under the terms of the
  20  * GNU General Public License ("GPL") version 2 as published by the Free
  21  * Software Foundation.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  27  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 #ifndef _TIPC_MONITOR_H
  37 #define _TIPC_MONITOR_H
  38
  39 #include "netlink.h"
  40
  41 /* struct tipc_mon_state: link instance's cache of monitor list and domain state
  42  * @list_gen: current generation of this node's monitor list
  43  * @gen: current generation of this node's local domain
  44  * @peer_gen: most recent domain generation received from peer
  45  * @acked_gen: most recent generation of self's domain acked by peer
  46  * @monitoring: this peer endpoint should continuously monitored
  47  * @probing: peer endpoint should be temporarily probed for potential loss
  48  * @synched: domain record's generation has been synched with peer after reset
  49  */
  50 struct tipc_mon_state {
  51         u16 list_gen;
  52         u16 peer_gen;
  53         u16 acked_gen;
  54         bool monitoring :1;
  55         bool probing    :1;
  56         bool reset      :1;
  57         bool synched    :1;
  58 };
  59
  60 int tipc_mon_create(struct net *net, int bearer_id);
  61 void tipc_mon_delete(struct net *net, int bearer_id);
  62
  63 void tipc_mon_peer_up(struct net *net, u32 addr, int bearer_id);
  64 void tipc_mon_peer_down(struct net *net, u32 addr, int bearer_id);
  65 void tipc_mon_prep(struct net *net, void *data, int *dlen,
  66                    struct tipc_mon_state *state, int bearer_id);
  67 void tipc_mon_rcv(struct net *net, void *data, u16 dlen, u32 addr,
  68                   struct tipc_mon_state *state, int bearer_id);
  69 void tipc_mon_get_state(struct net *net, u32 addr,
  70                         struct tipc_mon_state *state,
  71                         int bearer_id);
  72 void tipc_mon_remove_peer(struct net *net, u32 addr, int bearer_id);
  73
  74 int tipc_nl_monitor_set_threshold(struct net *net, u32 cluster_size);
  75 int tipc_nl_monitor_get_threshold(struct net *net);
  76 int __tipc_nl_add_monitor(struct net *net, struct tipc_nl_msg *msg,
  77                           u32 bearer_id);
  78 int tipc_nl_add_monitor_peer(struct net *net, struct tipc_nl_msg *msg,
  79                              u32 bearer_id, u32 *prev_node);
  80 void tipc_mon_reinit_self(struct net *net);
  81
  82 extern const int tipc_max_domain_size;
  83 #endif