net/tipc/name_table.h

   1 /*
   2  * net/tipc/name_table.h: Include file for TIPC name table code
   3  *
   4  * Copyright (c) 2000-2006, 2014-2015, Ericsson AB
   5  * Copyright (c) 2004-2005, 2010-2011, Wind River Systems
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the names of the copyright holders nor the names of its
  17  *    contributors may be used to endorse or promote products derived from
  18  *    this software without specific prior written permission.
  19  *
  20  * Alternatively, this software may be distributed under the terms of the
  21  * GNU General Public License ("GPL") version 2 as published by the Free
  22  * Software Foundation.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  32  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  33  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  34  * POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 #ifndef _TIPC_NAME_TABLE_H
  38 #define _TIPC_NAME_TABLE_H
  39
  40 struct tipc_subscription;
  41 struct tipc_plist;
  42 struct tipc_nlist;
  43 struct tipc_group;
  44
  45 /*
  46  * TIPC name types reserved for internal TIPC use (both current and planned)
  47  */
  48 #define TIPC_ZM_SRV             3       /* zone master service name type */
  49 #define TIPC_PUBL_SCOPE_NUM     (TIPC_NODE_SCOPE + 1)
  50 #define TIPC_NAMETBL_SIZE       1024    /* must be a power of 2 */
  51
  52 /**
  53  * struct publication - info about a published (name or) name sequence
  54  * @type: name sequence type
  55  * @lower: name sequence lower bound
  56  * @upper: name sequence upper bound
  57  * @scope: scope of publication
  58  * @node: network address of publishing port's node
  59  * @ref: publishing port
  60  * @key: publication key
  61  * @nodesub_list: subscription to "node down" event (off-node publication only)
  62  * @local_list: adjacent entries in list of publications made by this node
  63  * @pport_list: adjacent entries in list of publications made by this port
  64  * @node_list: adjacent matching name seq publications with >= node scope
  65  * @cluster_list: adjacent matching name seq publications with >= cluster scope
  66  * @zone_list: adjacent matching name seq publications with >= zone scope
  67  * @rcu: RCU callback head used for deferred freeing
  68  *
  69  * Note that the node list, cluster list, and zone list are circular lists.
  70  */
  71 struct publication {
  72         u32 type;
  73         u32 lower;
  74         u32 upper;
  75         u32 scope;
  76         u32 node;
  77         u32 ref;
  78         u32 key;
  79         struct list_head nodesub_list;
  80         struct list_head local_list;
  81         struct list_head pport_list;
  82         struct list_head node_list;
  83         struct list_head cluster_list;
  84         struct list_head zone_list;
  85         struct rcu_head rcu;
  86 };
  87
  88 /**
  89  * struct name_table - table containing all existing port name publications
  90  * @seq_hlist: name sequence hash lists
  91  * @publ_list: pulication lists
  92  * @local_publ_count: number of publications issued by this node
  93  */
  94 struct name_table {
  95         struct hlist_head seq_hlist[TIPC_NAMETBL_SIZE];
  96         struct list_head publ_list[TIPC_PUBL_SCOPE_NUM];
  97         u32 local_publ_count;
  98 };
  99
 100 int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb);
 101
 102 u32 tipc_nametbl_translate(struct net *net, u32 type, u32 instance, u32 *node);
 103 int tipc_nametbl_mc_lookup(struct net *net, u32 type, u32 lower, u32 upper,
 104                            u32 scope, bool exact, struct list_head *dports);
 105 void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp,
 106                               u32 type, u32 domain);
 107 void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower,
 108                                    u32 upper, struct tipc_nlist *nodes);
 109 bool tipc_nametbl_lookup(struct net *net, u32 type, u32 instance, u32 domain,
 110                          struct list_head *dsts, int *dstcnt, u32 exclude,
 111                          bool all);
 112 struct publication *tipc_nametbl_publish(struct net *net, u32 type, u32 lower,
 113                                          u32 upper, u32 scope, u32 port_ref,
 114                                          u32 key);
 115 int tipc_nametbl_withdraw(struct net *net, u32 type, u32 lower, u32 ref,
 116                           u32 key);
 117 struct publication *tipc_nametbl_insert_publ(struct net *net, u32 type,
 118                                              u32 lower, u32 upper, u32 scope,
 119                                              u32 node, u32 ref, u32 key);
 120 struct publication *tipc_nametbl_remove_publ(struct net *net, u32 type,
 121                                              u32 lower, u32 node, u32 ref,
 122                                              u32 key);
 123 void tipc_nametbl_subscribe(struct tipc_subscription *s, bool status);
 124 void tipc_nametbl_unsubscribe(struct tipc_subscription *s);
 125 int tipc_nametbl_init(struct net *net);
 126 void tipc_nametbl_stop(struct net *net);
 127
 128 struct tipc_dest {
 129         struct list_head list;
 130         union {
 131                 struct {
 132                         u32 port;
 133                         u32 node;
 134                 };
 135                 u64 value;
 136         };
 137 };
 138
 139 struct tipc_dest *tipc_dest_find(struct list_head *l, u32 node, u32 port);
 140 bool tipc_dest_push(struct list_head *l, u32 node, u32 port);
 141 bool tipc_dest_pop(struct list_head *l, u32 *node, u32 *port);
 142 bool tipc_dest_del(struct list_head *l, u32 node, u32 port);
 143 void tipc_dest_list_purge(struct list_head *l);
 144 int tipc_dest_list_len(struct list_head *l);
 145
 146 #endif