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1/*
2 * net/tipc/core.h: Include file for TIPC global declarations
3 *
4 * Copyright (c) 2005-2006, 2013 Ericsson AB
5 * Copyright (c) 2005-2007, 2010-2013, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 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.
19 *
20 * 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
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#ifndef _TIPC_CORE_H
38#define _TIPC_CORE_H
39
40#include <linux/tipc.h>
41#include <linux/tipc_config.h>
42#include <linux/tipc_netlink.h>
43#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>
49#include <linux/uaccess.h>
50#include <linux/interrupt.h>
51#include <linux/atomic.h>
52#include <linux/netdevice.h>
53#include <linux/in.h>
54#include <linux/list.h>
55#include <linux/slab.h>
56#include <linux/vmalloc.h>
57#include <linux/rtnetlink.h>
58#include <linux/etherdevice.h>
59#include <net/netns/generic.h>
60#include <linux/rhashtable.h>
61
62struct tipc_node;
63struct tipc_bearer;
64struct tipc_bc_base;
65struct tipc_link;
66struct tipc_name_table;
67struct tipc_server;
68struct tipc_monitor;
69
70#define TIPC_MOD_VER "2.0.0"
71
72#define NODE_HTABLE_SIZE 512
73#define MAX_BEARERS 3
74#define TIPC_DEF_MON_THRESHOLD 32
75
76extern unsigned int tipc_net_id __read_mostly;
77extern int sysctl_tipc_rmem[3] __read_mostly;
78extern int sysctl_tipc_named_timeout __read_mostly;
79
80struct tipc_net {
81 u32 own_addr;
82 int net_id;
83 int random;
84
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;
91
92 /* Neighbor monitoring list */
93 struct tipc_monitor *monitors[MAX_BEARERS];
94 int mon_threshold;
95
96 /* Bearer list */
97 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
98
99 /* Broadcast link */
100 spinlock_t bclock;
101 struct tipc_bc_base *bcbase;
102 struct tipc_link *bcl;
103
104 /* Socket hash table */
105 struct rhashtable sk_rht;
106
107 /* Name table */
108 spinlock_t nametbl_lock;
109 struct name_table *nametbl;
110
111 /* Name dist queue */
112 struct list_head dist_queue;
113
114 /* Topology subscription server */
115 struct tipc_server *topsrv;
116 atomic_t subscription_count;
117};
118
119static inline struct tipc_net *tipc_net(struct net *net)
120{
121 return net_generic(net, tipc_net_id);
122}
123
124static inline int tipc_netid(struct net *net)
125{
126 return tipc_net(net)->net_id;
127}
128
129static inline struct list_head *tipc_nodes(struct net *net)
130{
131 return &tipc_net(net)->node_list;
132}
133
134static inline struct tipc_server *tipc_topsrv(struct net *net)
135{
136 return tipc_net(net)->topsrv;
137}
138
139static inline unsigned int tipc_hashfn(u32 addr)
140{
141 return addr & (NODE_HTABLE_SIZE - 1);
142}
143
144static inline u16 mod(u16 x)
145{
146 return x & 0xffffu;
147}
148
149static inline int less_eq(u16 left, u16 right)
150{
151 return mod(right - left) < 32768u;
152}
153
154static inline int more(u16 left, u16 right)
155{
156 return !less_eq(left, right);
157}
158
159static inline int less(u16 left, u16 right)
160{
161 return less_eq(left, right) && (mod(right) != mod(left));
162}
163
164static inline int in_range(u16 val, u16 min, u16 max)
165{
166 return !less(val, min) && !more(val, max);
167}
168
169#ifdef CONFIG_SYSCTL
170int tipc_register_sysctl(void);
171void tipc_unregister_sysctl(void);
172#else
173#define tipc_register_sysctl() 0
174#define tipc_unregister_sysctl()
175#endif
176#endif