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Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/core.h: Include file for TIPC global declarations
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Ying Xuec5fa7b32013-06-17 10:54:39 -04004 * Copyright (c) 2005-2006, 2013 Ericsson AB
5 * Copyright (c) 2005-2007, 2010-2013, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 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.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * 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
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#ifndef _TIPC_CORE_H
38#define _TIPC_CORE_H
39
Jon Maloy5f7c3ff2006-01-13 10:45:44 +000040#include <linux/tipc.h>
41#include <linux/tipc_config.h>
Richard Alpe0655f6a2014-11-20 10:29:07 +010042#include <linux/tipc_netlink.h>
Per Lidenb97bf3f2006-01-02 19:04:38 +010043#include <linux/types.h>
44#include <linux/kernel.h>
45#include <linux/errno.h>
46#include <linux/mm.h>
47#include <linux/timer.h>
48#include <linux/string.h>
wangweidong776a74c2013-12-12 09:36:41 +080049#include <linux/uaccess.h>
Per Lidenb97bf3f2006-01-02 19:04:38 +010050#include <linux/interrupt.h>
Arun Sharma600634972011-07-26 16:09:06 -070051#include <linux/atomic.h>
Per Lidenb97bf3f2006-01-02 19:04:38 +010052#include <asm/hardirq.h>
53#include <linux/netdevice.h>
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090054#include <linux/in.h>
Per Lidenb97bf3f2006-01-02 19:04:38 +010055#include <linux/list.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090056#include <linux/slab.h>
Per Lidenb97bf3f2006-01-02 19:04:38 +010057#include <linux/vmalloc.h>
Ying Xueef13a262014-04-21 10:55:42 +080058#include <linux/rtnetlink.h>
Jon Paul Maloy38504c22014-05-14 05:39:13 -040059#include <linux/etherdevice.h>
Ying Xuec93d3ba2015-01-09 15:27:04 +080060#include <net/netns/generic.h>
Ying Xuee05b31f2015-01-09 15:27:08 +080061#include <linux/rhashtable.h>
Allan Stephens107e7be2010-05-11 14:30:08 +000062
Jon Paul Maloya6bf70f2015-05-14 10:46:13 -040063struct tipc_node;
64struct tipc_bearer;
65struct tipc_bcbearer;
66struct tipc_bclink;
67struct tipc_link;
68struct tipc_name_table;
69struct tipc_server;
Ying Xuef2f98002015-01-09 15:27:05 +080070
Allan Stephens107e7be2010-05-11 14:30:08 +000071#define TIPC_MOD_VER "2.0.0"
72
Jon Paul Maloya6bf70f2015-05-14 10:46:13 -040073#define NODE_HTABLE_SIZE 512
74#define MAX_BEARERS 3
75
Ying Xue61cdd4d2012-08-16 12:09:12 +000076extern int tipc_net_id __read_mostly;
Ying Xuecc79dd12013-06-17 10:54:37 -040077extern int sysctl_tipc_rmem[3] __read_mostly;
Erik Hugnea5325ae2014-08-28 09:08:47 +020078extern int sysctl_tipc_named_timeout __read_mostly;
Per Lidenb97bf3f2006-01-02 19:04:38 +010079
Ying Xuec93d3ba2015-01-09 15:27:04 +080080struct tipc_net {
Ying Xue34747532015-01-09 15:27:10 +080081 u32 own_addr;
Ying Xuec93d3ba2015-01-09 15:27:04 +080082 int net_id;
Ying Xuebafa29e2015-01-09 15:27:12 +080083 int random;
Ying Xuef2f98002015-01-09 15:27:05 +080084
85 /* Node table and node list */
86 spinlock_t node_list_lock;
87 struct hlist_head node_htable[NODE_HTABLE_SIZE];
88 struct list_head node_list;
89 u32 num_nodes;
90 u32 num_links;
Ying Xue7f9f95d2015-01-09 15:27:06 +080091
92 /* Bearer list */
93 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
Ying Xue1da46562015-01-09 15:27:07 +080094
95 /* Broadcast link */
96 struct tipc_bcbearer *bcbearer;
97 struct tipc_bclink *bclink;
98 struct tipc_link *bcl;
Ying Xuee05b31f2015-01-09 15:27:08 +080099
100 /* Socket hash table */
101 struct rhashtable sk_rht;
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800102
103 /* Name table */
104 spinlock_t nametbl_lock;
105 struct name_table *nametbl;
Ying Xuea62fbcc2015-01-09 15:27:11 +0800106
107 /* Topology subscription server */
108 struct tipc_server *topsrv;
109 atomic_t subscription_count;
Ying Xuec93d3ba2015-01-09 15:27:04 +0800110};
111
Jon Paul Maloy440d8962015-07-30 18:24:26 -0400112static inline struct tipc_net *tipc_net(struct net *net)
113{
114 return net_generic(net, tipc_net_id);
115}
116
Jon Paul Maloye4bf4f72015-05-14 10:46:14 -0400117static inline u16 mod(u16 x)
118{
119 return x & 0xffffu;
120}
121
122static inline int less_eq(u16 left, u16 right)
123{
124 return mod(right - left) < 32768u;
125}
126
127static inline int more(u16 left, u16 right)
128{
129 return !less_eq(left, right);
130}
131
132static inline int less(u16 left, u16 right)
133{
134 return less_eq(left, right) && (mod(right) != mod(left));
135}
136
Jon Paul Maloyd9992972015-07-16 16:54:31 -0400137static inline int in_range(u16 val, u16 min, u16 max)
138{
139 return !less(val, min) && !more(val, max);
140}
141
Ying Xuecc79dd12013-06-17 10:54:37 -0400142#ifdef CONFIG_SYSCTL
Joe Perchesc1b12032013-10-18 13:48:25 -0700143int tipc_register_sysctl(void);
144void tipc_unregister_sysctl(void);
Ying Xuecc79dd12013-06-17 10:54:37 -0400145#else
146#define tipc_register_sysctl() 0
147#define tipc_unregister_sysctl()
148#endif
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900149#endif