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 #include <net/netns/hash.h> 63 64 struct tipc_node; 65 struct tipc_bearer; 66 struct tipc_bc_base; 67 struct tipc_link; 68 struct tipc_name_table; 69 struct tipc_topsrv; 70 struct tipc_monitor; 71 72 #define TIPC_MOD_VER "2.0.0" 73 74 #define NODE_HTABLE_SIZE 512 75 #define MAX_BEARERS 3 76 #define TIPC_DEF_MON_THRESHOLD 32 77 #define NODE_ID_LEN 16 78 #define NODE_ID_STR_LEN (NODE_ID_LEN * 2 + 1) 79 80 extern unsigned int tipc_net_id __read_mostly; 81 extern int sysctl_tipc_rmem[3] __read_mostly; 82 extern int sysctl_tipc_named_timeout __read_mostly; 83 84 struct tipc_net { 85 u8 node_id[NODE_ID_LEN]; 86 u32 node_addr; 87 u32 trial_addr; 88 unsigned long addr_trial_end; 89 char node_id_string[NODE_ID_STR_LEN]; 90 int net_id; 91 int random; 92 bool legacy_addr_format; 93 94 /* Node table and node list */ 95 spinlock_t node_list_lock; 96 struct hlist_head node_htable[NODE_HTABLE_SIZE]; 97 struct list_head node_list; 98 u32 num_nodes; 99 u32 num_links; 100 101 /* Neighbor monitoring list */ 102 struct tipc_monitor *monitors[MAX_BEARERS]; 103 int mon_threshold; 104 105 /* Bearer list */ 106 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1]; 107 108 /* Broadcast link */ 109 spinlock_t bclock; 110 struct tipc_bc_base *bcbase; 111 struct tipc_link *bcl; 112 113 /* Socket hash table */ 114 struct rhashtable sk_rht; 115 116 /* Name table */ 117 spinlock_t nametbl_lock; 118 struct name_table *nametbl; 119 120 /* Name dist queue */ 121 struct list_head dist_queue; 122 123 /* Topology subscription server */ 124 struct tipc_topsrv *topsrv; 125 atomic_t subscription_count; 126 127 /* Cluster capabilities */ 128 u16 capabilities; 129 130 /* Tracing of node internal messages */ 131 struct packet_type loopback_pt; 132 }; 133 134 static inline struct tipc_net *tipc_net(struct net *net) 135 { 136 return net_generic(net, tipc_net_id); 137 } 138 139 static inline int tipc_netid(struct net *net) 140 { 141 return tipc_net(net)->net_id; 142 } 143 144 static inline struct list_head *tipc_nodes(struct net *net) 145 { 146 return &tipc_net(net)->node_list; 147 } 148 149 static inline struct name_table *tipc_name_table(struct net *net) 150 { 151 return tipc_net(net)->nametbl; 152 } 153 154 static inline struct tipc_topsrv *tipc_topsrv(struct net *net) 155 { 156 return tipc_net(net)->topsrv; 157 } 158 159 static inline unsigned int tipc_hashfn(u32 addr) 160 { 161 return addr & (NODE_HTABLE_SIZE - 1); 162 } 163 164 static inline u16 mod(u16 x) 165 { 166 return x & 0xffffu; 167 } 168 169 static inline int less_eq(u16 left, u16 right) 170 { 171 return mod(right - left) < 32768u; 172 } 173 174 static inline int more(u16 left, u16 right) 175 { 176 return !less_eq(left, right); 177 } 178 179 static inline int less(u16 left, u16 right) 180 { 181 return less_eq(left, right) && (mod(right) != mod(left)); 182 } 183 184 static inline int in_range(u16 val, u16 min, u16 max) 185 { 186 return !less(val, min) && !more(val, max); 187 } 188 189 static inline u32 tipc_net_hash_mixes(struct net *net, int tn_rand) 190 { 191 return net_hash_mix(&init_net) ^ net_hash_mix(net) ^ tn_rand; 192 } 193 194 #ifdef CONFIG_SYSCTL 195 int tipc_register_sysctl(void); 196 void tipc_unregister_sysctl(void); 197 #else 198 #define tipc_register_sysctl() 0 199 #define tipc_unregister_sysctl() 200 #endif 201 #endif 202