1 /* 1
2 * net/tipc/name_table.h: Include file for TIP
3 *
4 * Copyright (c) 2000-2006, 2014-2018, Ericsso
5 * Copyright (c) 2004-2005, 2010-2011, Wind Ri
6 * Copyright (c) 2020-2021, Red Hat Inc
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary
10 * modification, are permitted provided that t
11 *
12 * 1. Redistributions of source code must reta
13 * notice, this list of conditions and the
14 * 2. Redistributions in binary form must repr
15 * notice, this list of conditions and the
16 * documentation and/or other materials pro
17 * 3. Neither the names of the copyright holde
18 * contributors may be used to endorse or p
19 * this software without specific prior wri
20 *
21 * Alternatively, this software may be distrib
22 * GNU General Public License ("GPL") version
23 * Software Foundation.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCL
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND F
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYR
29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT L
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THE
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUD
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS S
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #ifndef _TIPC_NAME_TABLE_H
39 #define _TIPC_NAME_TABLE_H
40
41 struct tipc_subscription;
42 struct tipc_plist;
43 struct tipc_nlist;
44 struct tipc_group;
45 struct tipc_uaddr;
46
47 /*
48 * TIPC name types reserved for internal TIPC
49 */
50 #define TIPC_ZM_SRV 3 /* zon
51 #define TIPC_PUBL_SCOPE_NUM (TIPC_NODE_SCO
52 #define TIPC_NAMETBL_SIZE 1024 /* mus
53
54 #define TIPC_ANY_SCOPE 10 /* Both node an
55
56 /**
57 * struct publication - info about a published
58 * @sr: service range represented by this publ
59 * @sk: address of socket bound to this public
60 * @scope: scope of publication, TIPC_NODE_SCO
61 * @key: publication key, unique across the cl
62 * @id: publication id
63 * @binding_node: all publications from the sa
64 * - Remote publications: in node->publ_list;
65 * Used by node/name distr to withdraw publica
66 * - Local/node scope publications: in name_ta
67 * - Local/cluster scope publications: in name
68 * @binding_sock: all publications from the sa
69 * Used by socket to withdraw publications w
70 * @local_publ: list of identical publications
71 * Used by closest_first and multicast recei
72 * @all_publ: all publications identical to th
73 * Used by round-robin lookup algorithm
74 * @list: to form a list of publications in te
75 * @rcu: RCU callback head used for deferred f
76 */
77 struct publication {
78 struct tipc_service_range sr;
79 struct tipc_socket_addr sk;
80 u16 scope;
81 u32 key;
82 u32 id;
83 struct list_head binding_node;
84 struct list_head binding_sock;
85 struct list_head local_publ;
86 struct list_head all_publ;
87 struct list_head list;
88 struct rcu_head rcu;
89 };
90
91 /**
92 * struct name_table - table containing all ex
93 * @services: name sequence hash lists
94 * @node_scope: all local publications with no
95 * - used by name_distr during r
96 * @cluster_scope: all local publications with
97 * - used by name_distr to send
98 * - used by name_distr during r
99 * @cluster_scope_lock: lock for accessing @cl
100 * @local_publ_count: number of publications i
101 * @rc_dests: destination node counter
102 * @snd_nxt: next sequence number to be used
103 */
104 struct name_table {
105 struct hlist_head services[TIPC_NAMETB
106 struct list_head node_scope;
107 struct list_head cluster_scope;
108 rwlock_t cluster_scope_lock;
109 u32 local_publ_count;
110 u32 rc_dests;
111 u32 snd_nxt;
112 };
113
114 int tipc_nl_name_table_dump(struct sk_buff *sk
115 bool tipc_nametbl_lookup_anycast(struct net *n
116 struct tipc_s
117 void tipc_nametbl_lookup_mcast_sockets(struct
118 struct
119 void tipc_nametbl_lookup_mcast_nodes(struct ne
120 struct ti
121 bool tipc_nametbl_lookup_group(struct net *net
122 struct list_hea
123 u32 exclude, bo
124 void tipc_nametbl_build_group(struct net *net,
125 struct tipc_uadd
126 struct publication *tipc_nametbl_publish(struc
127 struc
128 void tipc_nametbl_withdraw(struct net *net, st
129 struct tipc_socket_
130 struct publication *tipc_nametbl_insert_publ(s
131 s
132 s
133 u
134 struct publication *tipc_nametbl_remove_publ(s
135 s
136 s
137 u
138 bool tipc_nametbl_subscribe(struct tipc_subscr
139 void tipc_nametbl_unsubscribe(struct tipc_subs
140 int tipc_nametbl_init(struct net *net);
141 void tipc_nametbl_stop(struct net *net);
142
143 struct tipc_dest {
144 struct list_head list;
145 u32 port;
146 u32 node;
147 };
148
149 struct tipc_dest *tipc_dest_find(struct list_h
150 bool tipc_dest_push(struct list_head *l, u32 n
151 bool tipc_dest_pop(struct list_head *l, u32 *n
152 bool tipc_dest_del(struct list_head *l, u32 no
153 void tipc_dest_list_purge(struct list_head *l)
154
155 #endif
156
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