/*
* 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
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