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/net/tipc/name_table.h

http://github.com/torvalds/linux
C Header | 152 lines | 70 code | 10 blank | 72 comment | 0 complexity | ac9877371cd0f1aa3ebde1d1f096613b MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
  1. /*
  2. * net/tipc/name_table.h: Include file for TIPC name table code
  3. *
  4. * Copyright (c) 2000-2006, 2014-2018, 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. #ifndef _TIPC_NAME_TABLE_H
  37. #define _TIPC_NAME_TABLE_H
  38. struct tipc_subscription;
  39. struct tipc_plist;
  40. struct tipc_nlist;
  41. struct tipc_group;
  42. /*
  43. * TIPC name types reserved for internal TIPC use (both current and planned)
  44. */
  45. #define TIPC_ZM_SRV 3 /* zone master service name type */
  46. #define TIPC_PUBL_SCOPE_NUM (TIPC_NODE_SCOPE + 1)
  47. #define TIPC_NAMETBL_SIZE 1024 /* must be a power of 2 */
  48. /**
  49. * struct publication - info about a published (name or) name sequence
  50. * @type: name sequence type
  51. * @lower: name sequence lower bound
  52. * @upper: name sequence upper bound
  53. * @scope: scope of publication, TIPC_NODE_SCOPE or TIPC_CLUSTER_SCOPE
  54. * @node: network address of publishing socket's node
  55. * @port: publishing port
  56. * @key: publication key, unique across the cluster
  57. * @id: publication id
  58. * @binding_node: all publications from the same node which bound this one
  59. * - Remote publications: in node->publ_list
  60. * Used by node/name distr to withdraw publications when node is lost
  61. * - Local/node scope publications: in name_table->node_scope list
  62. * - Local/cluster scope publications: in name_table->cluster_scope list
  63. * @binding_sock: all publications from the same socket which bound this one
  64. * Used by socket to withdraw publications when socket is unbound/released
  65. * @local_publ: list of identical publications made from this node
  66. * Used by closest_first and multicast receive lookup algorithms
  67. * @all_publ: all publications identical to this one, whatever node and scope
  68. * Used by round-robin lookup algorithm
  69. * @list: to form a list of publications in temporal order
  70. * @rcu: RCU callback head used for deferred freeing
  71. */
  72. struct publication {
  73. u32 type;
  74. u32 lower;
  75. u32 upper;
  76. u32 scope;
  77. u32 node;
  78. u32 port;
  79. u32 key;
  80. u32 id;
  81. struct list_head binding_node;
  82. struct list_head binding_sock;
  83. struct list_head local_publ;
  84. struct list_head all_publ;
  85. struct list_head list;
  86. struct rcu_head rcu;
  87. };
  88. /**
  89. * struct name_table - table containing all existing port name publications
  90. * @seq_hlist: name sequence hash lists
  91. * @node_scope: all local publications with node scope
  92. * - used by name_distr during re-init of name table
  93. * @cluster_scope: all local publications with cluster scope
  94. * - used by name_distr to send bulk updates to new nodes
  95. * - used by name_distr during re-init of name table
  96. * @local_publ_count: number of publications issued by this node
  97. */
  98. struct name_table {
  99. struct hlist_head services[TIPC_NAMETBL_SIZE];
  100. struct list_head node_scope;
  101. struct list_head cluster_scope;
  102. rwlock_t cluster_scope_lock;
  103. u32 local_publ_count;
  104. };
  105. int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb);
  106. u32 tipc_nametbl_translate(struct net *net, u32 type, u32 instance, u32 *node);
  107. void tipc_nametbl_mc_lookup(struct net *net, u32 type, u32 lower, u32 upper,
  108. u32 scope, bool exact, struct list_head *dports);
  109. void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp,
  110. u32 type, u32 domain);
  111. void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower,
  112. u32 upper, struct tipc_nlist *nodes);
  113. bool tipc_nametbl_lookup(struct net *net, u32 type, u32 instance, u32 domain,
  114. struct list_head *dsts, int *dstcnt, u32 exclude,
  115. bool all);
  116. struct publication *tipc_nametbl_publish(struct net *net, u32 type, u32 lower,
  117. u32 upper, u32 scope, u32 port,
  118. u32 key);
  119. int tipc_nametbl_withdraw(struct net *net, u32 type, u32 lower, u32 upper,
  120. u32 key);
  121. struct publication *tipc_nametbl_insert_publ(struct net *net, u32 type,
  122. u32 lower, u32 upper, u32 scope,
  123. u32 node, u32 ref, u32 key);
  124. struct publication *tipc_nametbl_remove_publ(struct net *net, u32 type,
  125. u32 lower, u32 upper,
  126. u32 node, u32 key);
  127. bool tipc_nametbl_subscribe(struct tipc_subscription *s);
  128. void tipc_nametbl_unsubscribe(struct tipc_subscription *s);
  129. int tipc_nametbl_init(struct net *net);
  130. void tipc_nametbl_stop(struct net *net);
  131. struct tipc_dest {
  132. struct list_head list;
  133. u32 port;
  134. u32 node;
  135. };
  136. struct tipc_dest *tipc_dest_find(struct list_head *l, u32 node, u32 port);
  137. bool tipc_dest_push(struct list_head *l, u32 node, u32 port);
  138. bool tipc_dest_pop(struct list_head *l, u32 *node, u32 *port);
  139. bool tipc_dest_del(struct list_head *l, u32 node, u32 port);
  140. void tipc_dest_list_purge(struct list_head *l);
  141. int tipc_dest_list_len(struct list_head *l);
  142. #endif