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156 lines
6.5 KiB
156 lines
6.5 KiB
/* |
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* net/tipc/name_table.h: Include file for TIPC name table code |
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* |
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* Copyright (c) 2000-2006, 2014-2018, Ericsson AB |
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* Copyright (c) 2004-2005, 2010-2011, Wind River Systems |
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* Copyright (c) 2020-2021, Red Hat Inc |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the names of the copyright holders nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* Alternatively, this software may be distributed under the terms of the |
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* GNU General Public License ("GPL") version 2 as published by the Free |
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* Software Foundation. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#ifndef _TIPC_NAME_TABLE_H |
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#define _TIPC_NAME_TABLE_H |
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struct tipc_subscription; |
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struct tipc_plist; |
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struct tipc_nlist; |
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struct tipc_group; |
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struct tipc_uaddr; |
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/* |
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* TIPC name types reserved for internal TIPC use (both current and planned) |
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*/ |
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#define TIPC_ZM_SRV 3 /* zone master service name type */ |
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#define TIPC_PUBL_SCOPE_NUM (TIPC_NODE_SCOPE + 1) |
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#define TIPC_NAMETBL_SIZE 1024 /* must be a power of 2 */ |
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#define TIPC_ANY_SCOPE 10 /* Both node and cluster scope will match */ |
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/** |
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* struct publication - info about a published service address or range |
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* @sr: service range represented by this publication |
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* @sk: address of socket bound to this publication |
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* @scope: scope of publication, TIPC_NODE_SCOPE or TIPC_CLUSTER_SCOPE |
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* @key: publication key, unique across the cluster |
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* @id: publication id |
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* @binding_node: all publications from the same node which bound this one |
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* - Remote publications: in node->publ_list; |
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* Used by node/name distr to withdraw publications when node is lost |
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* - Local/node scope publications: in name_table->node_scope list |
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* - Local/cluster scope publications: in name_table->cluster_scope list |
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* @binding_sock: all publications from the same socket which bound this one |
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* Used by socket to withdraw publications when socket is unbound/released |
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* @local_publ: list of identical publications made from this node |
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* Used by closest_first and multicast receive lookup algorithms |
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* @all_publ: all publications identical to this one, whatever node and scope |
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* Used by round-robin lookup algorithm |
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* @list: to form a list of publications in temporal order |
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* @rcu: RCU callback head used for deferred freeing |
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*/ |
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struct publication { |
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struct tipc_service_range sr; |
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struct tipc_socket_addr sk; |
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u16 scope; |
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u32 key; |
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u32 id; |
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struct list_head binding_node; |
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struct list_head binding_sock; |
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struct list_head local_publ; |
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struct list_head all_publ; |
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struct list_head list; |
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struct rcu_head rcu; |
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}; |
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/** |
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* struct name_table - table containing all existing port name publications |
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* @services: name sequence hash lists |
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* @node_scope: all local publications with node scope |
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* - used by name_distr during re-init of name table |
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* @cluster_scope: all local publications with cluster scope |
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* - used by name_distr to send bulk updates to new nodes |
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* - used by name_distr during re-init of name table |
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* @cluster_scope_lock: lock for accessing @cluster_scope |
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* @local_publ_count: number of publications issued by this node |
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* @rc_dests: destination node counter |
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* @snd_nxt: next sequence number to be used |
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*/ |
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struct name_table { |
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struct hlist_head services[TIPC_NAMETBL_SIZE]; |
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struct list_head node_scope; |
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struct list_head cluster_scope; |
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rwlock_t cluster_scope_lock; |
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u32 local_publ_count; |
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u32 rc_dests; |
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u32 snd_nxt; |
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}; |
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int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb); |
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bool tipc_nametbl_lookup_anycast(struct net *net, struct tipc_uaddr *ua, |
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struct tipc_socket_addr *sk); |
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void tipc_nametbl_lookup_mcast_sockets(struct net *net, struct tipc_uaddr *ua, |
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struct list_head *dports); |
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void tipc_nametbl_lookup_mcast_nodes(struct net *net, struct tipc_uaddr *ua, |
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struct tipc_nlist *nodes); |
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bool tipc_nametbl_lookup_group(struct net *net, struct tipc_uaddr *ua, |
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struct list_head *dsts, int *dstcnt, |
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u32 exclude, bool mcast); |
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void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp, |
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struct tipc_uaddr *ua); |
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struct publication *tipc_nametbl_publish(struct net *net, struct tipc_uaddr *ua, |
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struct tipc_socket_addr *sk, u32 key); |
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void tipc_nametbl_withdraw(struct net *net, struct tipc_uaddr *ua, |
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struct tipc_socket_addr *sk, u32 key); |
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struct publication *tipc_nametbl_insert_publ(struct net *net, |
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struct tipc_uaddr *ua, |
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struct tipc_socket_addr *sk, |
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u32 key); |
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struct publication *tipc_nametbl_remove_publ(struct net *net, |
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struct tipc_uaddr *ua, |
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struct tipc_socket_addr *sk, |
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u32 key); |
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bool tipc_nametbl_subscribe(struct tipc_subscription *s); |
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void tipc_nametbl_unsubscribe(struct tipc_subscription *s); |
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int tipc_nametbl_init(struct net *net); |
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void tipc_nametbl_stop(struct net *net); |
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struct tipc_dest { |
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struct list_head list; |
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u32 port; |
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u32 node; |
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}; |
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struct tipc_dest *tipc_dest_find(struct list_head *l, u32 node, u32 port); |
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bool tipc_dest_push(struct list_head *l, u32 node, u32 port); |
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bool tipc_dest_pop(struct list_head *l, u32 *node, u32 *port); |
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bool tipc_dest_del(struct list_head *l, u32 node, u32 port); |
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void tipc_dest_list_purge(struct list_head *l); |
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int tipc_dest_list_len(struct list_head *l); |
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#endif
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