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 <asm/hardirq.h>
53 #include <linux/netdevice.h>
54 #include <linux/in.h>
55 #include <linux/list.h>
56 #include <linux/slab.h>
57 #include <linux/vmalloc.h>
58 #include <linux/rtnetlink.h>
59 #include <linux/etherdevice.h>
60 #include <net/netns/generic.h>
61 #include <linux/rhashtable.h>
62
63 struct tipc_node;
64 struct tipc_bearer;
65 struct tipc_bc_base;
66 struct tipc_link;
67 struct tipc_name_table;
68 struct tipc_server;
69
70 #define TIPC_MOD_VER "2.0.0"
71
72 #define NODE_HTABLE_SIZE 512
73 #define MAX_BEARERS 3
74
75 extern int tipc_net_id __read_mostly;
76 extern int sysctl_tipc_rmem[3] __read_mostly;
77 extern int sysctl_tipc_named_timeout __read_mostly;
78
79 struct tipc_net {
80 u32 own_addr;
81 int net_id;
82 int random;
83
84 /* Node table and node list */
85 spinlock_t node_list_lock;
86 struct hlist_head node_htable[NODE_HTABLE_SIZE];
87 struct list_head node_list;
88 u32 num_nodes;
89 u32 num_links;
90
91 /* Bearer list */
92 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
93
94 /* Broadcast link */
95 spinlock_t bclock;
96 struct tipc_bc_base *bcbase;
97 struct tipc_link *bcl;
98
99 /* Socket hash table */
100 struct rhashtable sk_rht;
101
102 /* Name table */
103 spinlock_t nametbl_lock;
104 struct name_table *nametbl;
105
106 /* Name dist queue */
107 struct list_head dist_queue;
108
109 /* Topology subscription server */
110 struct tipc_server *topsrv;
111 atomic_t subscription_count;
112 };
113
tipc_net(struct net * net)114 static inline struct tipc_net *tipc_net(struct net *net)
115 {
116 return net_generic(net, tipc_net_id);
117 }
118
tipc_netid(struct net * net)119 static inline int tipc_netid(struct net *net)
120 {
121 return tipc_net(net)->net_id;
122 }
123
mod(u16 x)124 static inline u16 mod(u16 x)
125 {
126 return x & 0xffffu;
127 }
128
less_eq(u16 left,u16 right)129 static inline int less_eq(u16 left, u16 right)
130 {
131 return mod(right - left) < 32768u;
132 }
133
more(u16 left,u16 right)134 static inline int more(u16 left, u16 right)
135 {
136 return !less_eq(left, right);
137 }
138
less(u16 left,u16 right)139 static inline int less(u16 left, u16 right)
140 {
141 return less_eq(left, right) && (mod(right) != mod(left));
142 }
143
in_range(u16 val,u16 min,u16 max)144 static inline int in_range(u16 val, u16 min, u16 max)
145 {
146 return !less(val, min) && !more(val, max);
147 }
148
149 #ifdef CONFIG_SYSCTL
150 int tipc_register_sysctl(void);
151 void tipc_unregister_sysctl(void);
152 #else
153 #define tipc_register_sysctl() 0
154 #define tipc_unregister_sysctl()
155 #endif
156 #endif
157