2 * net/tipc/core.h: Include file for TIPC global declarations
4 * Copyright (c) 2005-2006, 2013-2018 Ericsson AB
5 * Copyright (c) 2005-2007, 2010-2013, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
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.
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.
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.
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>
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>
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 #include <net/netns/hash.h>
68 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
74 struct tipc_name_table;
77 #ifdef CONFIG_TIPC_CRYPTO
81 #define TIPC_MOD_VER "2.0.0"
83 #define NODE_HTABLE_SIZE 512
85 #define TIPC_DEF_MON_THRESHOLD 32
86 #define NODE_ID_LEN 16
87 #define NODE_ID_STR_LEN (NODE_ID_LEN * 2 + 1)
89 extern unsigned int tipc_net_id __read_mostly;
90 extern int sysctl_tipc_rmem[3] __read_mostly;
91 extern int sysctl_tipc_named_timeout __read_mostly;
94 u8 node_id[NODE_ID_LEN];
97 unsigned long addr_trial_end;
98 char node_id_string[NODE_ID_STR_LEN];
101 bool legacy_addr_format;
103 /* Node table and node list */
104 spinlock_t node_list_lock;
105 struct hlist_head node_htable[NODE_HTABLE_SIZE];
106 struct list_head node_list;
110 /* Neighbor monitoring list */
111 struct tipc_monitor *monitors[MAX_BEARERS];
115 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
119 struct tipc_bc_base *bcbase;
120 struct tipc_link *bcl;
122 /* Socket hash table */
123 struct rhashtable sk_rht;
126 spinlock_t nametbl_lock;
127 struct name_table *nametbl;
129 /* Name dist queue */
130 struct list_head dist_queue;
132 /* Topology subscription server */
133 struct tipc_topsrv *topsrv;
134 atomic_t subscription_count;
136 /* Cluster capabilities */
139 /* Tracing of node internal messages */
140 struct packet_type loopback_pt;
142 #ifdef CONFIG_TIPC_CRYPTO
143 /* TX crypto handler */
144 struct tipc_crypto *crypto_tx;
146 /* Work item for net finalize */
147 struct work_struct work;
148 /* The numbers of work queues in schedule */
152 static inline struct tipc_net *tipc_net(struct net *net)
154 return net_generic(net, tipc_net_id);
157 static inline int tipc_netid(struct net *net)
159 return tipc_net(net)->net_id;
162 static inline struct list_head *tipc_nodes(struct net *net)
164 return &tipc_net(net)->node_list;
167 static inline struct name_table *tipc_name_table(struct net *net)
169 return tipc_net(net)->nametbl;
172 static inline struct tipc_topsrv *tipc_topsrv(struct net *net)
174 return tipc_net(net)->topsrv;
177 static inline unsigned int tipc_hashfn(u32 addr)
179 return addr & (NODE_HTABLE_SIZE - 1);
182 static inline u16 mod(u16 x)
187 static inline int less_eq(u16 left, u16 right)
189 return mod(right - left) < 32768u;
192 static inline int more(u16 left, u16 right)
194 return !less_eq(left, right);
197 static inline int less(u16 left, u16 right)
199 return less_eq(left, right) && (mod(right) != mod(left));
202 static inline int in_range(u16 val, u16 min, u16 max)
204 return !less(val, min) && !more(val, max);
207 static inline u32 tipc_net_hash_mixes(struct net *net, int tn_rand)
209 return net_hash_mix(&init_net) ^ net_hash_mix(net) ^ tn_rand;
213 int tipc_register_sysctl(void);
214 void tipc_unregister_sysctl(void);
216 #define tipc_register_sysctl() 0
217 #define tipc_unregister_sysctl()