/* * net/tipc/name_table.h: Include file for TIPC name table code * * Copyright (c) 2000-2006, 2014-2018, Ericsson AB * Copyright (c) 2004-2005, 2010-2011, Wind River Systems * Copyright (c) 2020-2021, Red Hat Inc * 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_NAME_TABLE_H#define _TIPC_NAME_TABLE_H struct tipc_subscription;struct tipc_plist;struct tipc_nlist;struct tipc_group;struct tipc_uaddr; /* * TIPC name types reserved for internal TIPC use (both current and planned) */#define TIPC_ZM_SRV		3	/* zone master service name type */#define TIPC_PUBL_SCOPE_NUM	(TIPC_NODE_SCOPE + 1)#define TIPC_NAMETBL_SIZE	1024	/* must be a power of 2 */ #define TIPC_ANY_SCOPE 10      /* Both node and cluster scope will match */ /** * struct publication - info about a published service address or range * @sr: service range represented by this publication * @sk: address of socket bound to this publication * @scope: scope of publication, TIPC_NODE_SCOPE or TIPC_CLUSTER_SCOPE * @key: publication key, unique across the cluster * @id: publication id * @binding_node: all publications from the same node which bound this one * - Remote publications: in node->publ_list; * Used by node/name distr to withdraw publications when node is lost * - Local/node scope publications: in name_table->node_scope list * - Local/cluster scope publications: in name_table->cluster_scope list * @binding_sock: all publications from the same socket which bound this one *   Used by socket to withdraw publications when socket is unbound/released * @local_publ: list of identical publications made from this node *   Used by closest_first and multicast receive lookup algorithms * @all_publ: all publications identical to this one, whatever node and scope *   Used by round-robin lookup algorithm * @list: to form a list of publications in temporal order * @rcu: RCU callback head used for deferred freeing */struct publication {	struct tipc_service_range sr;	struct tipc_socket_addr sk;	u16 scope;	u32 key;	u32 id;	struct list_head binding_node;	struct list_head binding_sock;	struct list_head local_publ;	struct list_head all_publ;	struct list_head list;	struct rcu_head rcu;}; /** * struct name_table - table containing all existing port name publications * @rcu: RCU callback head used for deferred freeing * @services: name sequence hash lists * @node_scope: all local publications with node scope *               - used by name_distr during re-init of name table * @cluster_scope: all local publications with cluster scope *               - used by name_distr to send bulk updates to new nodes *               - used by name_distr during re-init of name table * @cluster_scope_lock: lock for accessing @cluster_scope * @local_publ_count: number of publications issued by this node * @rc_dests: destination node counter * @snd_nxt: next sequence number to be used */struct name_table {	struct rcu_head rcu;	struct hlist_head services[TIPC_NAMETBL_SIZE];	struct list_head node_scope;	struct list_head cluster_scope;	rwlock_t cluster_scope_lock;	u32 local_publ_count;	u32 rc_dests;	u32 snd_nxt;}; int tipc_nl_name_table_dump(struct sk_buff *skb, struct netlink_callback *cb);bool tipc_nametbl_lookup_anycast(struct net *net, struct tipc_uaddr *ua,				 struct tipc_socket_addr *sk);void tipc_nametbl_lookup_mcast_sockets(struct net *net, struct tipc_uaddr *ua,				       struct list_head *dports);void tipc_nametbl_lookup_mcast_nodes(struct net *net, struct tipc_uaddr *ua,				     struct tipc_nlist *nodes);bool tipc_nametbl_lookup_group(struct net *net, struct tipc_uaddr *ua,			       struct list_head *dsts, int *dstcnt,			       u32 exclude, bool mcast);void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp,			      struct tipc_uaddr *ua);struct publication *tipc_nametbl_publish(struct net *net, struct tipc_uaddr *ua,					 struct tipc_socket_addr *sk, u32 key);void tipc_nametbl_withdraw(struct net *net, struct tipc_uaddr *ua,			   struct tipc_socket_addr *sk, u32 key);struct publication *tipc_nametbl_insert_publ(struct net *net,					     struct tipc_uaddr *ua,					     struct tipc_socket_addr *sk,					     u32 key);struct publication *tipc_nametbl_remove_publ(struct net *net,					     struct tipc_uaddr *ua,					     struct tipc_socket_addr *sk,					     u32 key);bool tipc_nametbl_subscribe(struct tipc_subscription *s);void tipc_nametbl_unsubscribe(struct tipc_subscription *s);int tipc_nametbl_init(struct net *net);void tipc_nametbl_stop(struct net *net); struct tipc_dest {	struct list_head list;	u32 port;	u32 node;}; struct tipc_dest *tipc_dest_find(struct list_head *l, u32 node, u32 port);bool tipc_dest_push(struct list_head *l, u32 node, u32 port);bool tipc_dest_pop(struct list_head *l, u32 *node, u32 *port);bool tipc_dest_del(struct list_head *l, u32 node, u32 port);void tipc_dest_list_purge(struct list_head *l); #endif