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1/*
2 * net/tipc/core.h: Include file for TIPC global declarations
3 *
4 * Copyright (c) 2005-2006, 2013-2018 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#include <net/genetlink.h>
62
63#ifdef pr_fmt
64#undef pr_fmt
65#endif
66
67#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
68
69struct tipc_node;
70struct tipc_bearer;
71struct tipc_bc_base;
72struct tipc_link;
73struct tipc_name_table;
74struct tipc_topsrv;
75struct tipc_monitor;
76
77#define TIPC_MOD_VER "2.0.0"
78
79#define NODE_HTABLE_SIZE 512
80#define MAX_BEARERS 3
81#define TIPC_DEF_MON_THRESHOLD 32
82#define NODE_ID_LEN 16
83#define NODE_ID_STR_LEN (NODE_ID_LEN * 2 + 1)
84
85extern unsigned int tipc_net_id __read_mostly;
86extern int sysctl_tipc_rmem[3] __read_mostly;
87extern int sysctl_tipc_named_timeout __read_mostly;
88
89struct tipc_net {
90 u8 node_id[NODE_ID_LEN];
91 u32 node_addr;
92 u32 trial_addr;
93 unsigned long addr_trial_end;
94 char node_id_string[NODE_ID_STR_LEN];
95 int net_id;
96 int random;
97 bool legacy_addr_format;
98
99 /* Node table and node list */
100 spinlock_t node_list_lock;
101 struct hlist_head node_htable[NODE_HTABLE_SIZE];
102 struct list_head node_list;
103 u32 num_nodes;
104 u32 num_links;
105
106 /* Neighbor monitoring list */
107 struct tipc_monitor *monitors[MAX_BEARERS];
108 int mon_threshold;
109
110 /* Bearer list */
111 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
112
113 /* Broadcast link */
114 spinlock_t bclock;
115 struct tipc_bc_base *bcbase;
116 struct tipc_link *bcl;
117
118 /* Socket hash table */
119 struct rhashtable sk_rht;
120
121 /* Name table */
122 spinlock_t nametbl_lock;
123 struct name_table *nametbl;
124
125 /* Name dist queue */
126 struct list_head dist_queue;
127
128 /* Topology subscription server */
129 struct tipc_topsrv *topsrv;
130 atomic_t subscription_count;
131
132 /* Cluster capabilities */
133 u16 capabilities;
134
135 /* Tracing of node internal messages */
136 struct packet_type loopback_pt;
137};
138
139static inline struct tipc_net *tipc_net(struct net *net)
140{
141 return net_generic(net, tipc_net_id);
142}
143
144static inline int tipc_netid(struct net *net)
145{
146 return tipc_net(net)->net_id;
147}
148
149static inline struct list_head *tipc_nodes(struct net *net)
150{
151 return &tipc_net(net)->node_list;
152}
153
154static inline struct name_table *tipc_name_table(struct net *net)
155{
156 return tipc_net(net)->nametbl;
157}
158
159static inline struct tipc_topsrv *tipc_topsrv(struct net *net)
160{
161 return tipc_net(net)->topsrv;
162}
163
164static inline unsigned int tipc_hashfn(u32 addr)
165{
166 return addr & (NODE_HTABLE_SIZE - 1);
167}
168
169static inline u16 mod(u16 x)
170{
171 return x & 0xffffu;
172}
173
174static inline int less_eq(u16 left, u16 right)
175{
176 return mod(right - left) < 32768u;
177}
178
179static inline int more(u16 left, u16 right)
180{
181 return !less_eq(left, right);
182}
183
184static inline int less(u16 left, u16 right)
185{
186 return less_eq(left, right) && (mod(right) != mod(left));
187}
188
189static inline int in_range(u16 val, u16 min, u16 max)
190{
191 return !less(val, min) && !more(val, max);
192}
193
194#ifdef CONFIG_SYSCTL
195int tipc_register_sysctl(void);
196void tipc_unregister_sysctl(void);
197#else
198#define tipc_register_sysctl() 0
199#define tipc_unregister_sysctl()
200#endif
201#endif
1/*
2 * net/tipc/core.h: Include file for TIPC global declarations
3 *
4 * Copyright (c) 2005-2006, 2013-2018 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#include <net/genetlink.h>
62
63struct tipc_node;
64struct tipc_bearer;
65struct tipc_bc_base;
66struct tipc_link;
67struct tipc_name_table;
68struct tipc_topsrv;
69struct tipc_monitor;
70
71#define TIPC_MOD_VER "2.0.0"
72
73#define NODE_HTABLE_SIZE 512
74#define MAX_BEARERS 3
75#define TIPC_DEF_MON_THRESHOLD 32
76#define NODE_ID_LEN 16
77#define NODE_ID_STR_LEN (NODE_ID_LEN * 2 + 1)
78
79extern unsigned int tipc_net_id __read_mostly;
80extern int sysctl_tipc_rmem[3] __read_mostly;
81extern int sysctl_tipc_named_timeout __read_mostly;
82
83struct tipc_net {
84 u8 node_id[NODE_ID_LEN];
85 u32 node_addr;
86 u32 trial_addr;
87 unsigned long addr_trial_end;
88 char node_id_string[NODE_ID_STR_LEN];
89 int net_id;
90 int random;
91 bool legacy_addr_format;
92
93 /* Node table and node list */
94 spinlock_t node_list_lock;
95 struct hlist_head node_htable[NODE_HTABLE_SIZE];
96 struct list_head node_list;
97 u32 num_nodes;
98 u32 num_links;
99
100 /* Neighbor monitoring list */
101 struct tipc_monitor *monitors[MAX_BEARERS];
102 int mon_threshold;
103
104 /* Bearer list */
105 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
106
107 /* Broadcast link */
108 spinlock_t bclock;
109 struct tipc_bc_base *bcbase;
110 struct tipc_link *bcl;
111
112 /* Socket hash table */
113 struct rhashtable sk_rht;
114
115 /* Name table */
116 spinlock_t nametbl_lock;
117 struct name_table *nametbl;
118
119 /* Name dist queue */
120 struct list_head dist_queue;
121
122 /* Topology subscription server */
123 struct tipc_topsrv *topsrv;
124 atomic_t subscription_count;
125};
126
127static inline struct tipc_net *tipc_net(struct net *net)
128{
129 return net_generic(net, tipc_net_id);
130}
131
132static inline int tipc_netid(struct net *net)
133{
134 return tipc_net(net)->net_id;
135}
136
137static inline struct list_head *tipc_nodes(struct net *net)
138{
139 return &tipc_net(net)->node_list;
140}
141
142static inline struct name_table *tipc_name_table(struct net *net)
143{
144 return tipc_net(net)->nametbl;
145}
146
147static inline struct tipc_topsrv *tipc_topsrv(struct net *net)
148{
149 return tipc_net(net)->topsrv;
150}
151
152static inline unsigned int tipc_hashfn(u32 addr)
153{
154 return addr & (NODE_HTABLE_SIZE - 1);
155}
156
157static inline u16 mod(u16 x)
158{
159 return x & 0xffffu;
160}
161
162static inline int less_eq(u16 left, u16 right)
163{
164 return mod(right - left) < 32768u;
165}
166
167static inline int more(u16 left, u16 right)
168{
169 return !less_eq(left, right);
170}
171
172static inline int less(u16 left, u16 right)
173{
174 return less_eq(left, right) && (mod(right) != mod(left));
175}
176
177static inline int in_range(u16 val, u16 min, u16 max)
178{
179 return !less(val, min) && !more(val, max);
180}
181
182#ifdef CONFIG_SYSCTL
183int tipc_register_sysctl(void);
184void tipc_unregister_sysctl(void);
185#else
186#define tipc_register_sysctl() 0
187#define tipc_unregister_sysctl()
188#endif
189#endif