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 struct tipc_node; 64 struct tipc_bearer; 65 struct tipc_bc_base; 66 struct tipc_link; 67 struct tipc_name_table; 68 struct tipc_topsrv; 69 struct 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 79 extern unsigned int tipc_net_id __read_mostly; 80 extern int sysctl_tipc_rmem[3] __read_mostly; 81 extern int sysctl_tipc_named_timeout __read_mostly; 82 83 struct 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 /* Cluster capabilities */ 127 u16 capabilities; 128 }; 129 130 static inline struct tipc_net *tipc_net(struct net *net) 131 { 132 return net_generic(net, tipc_net_id); 133 } 134 135 static inline int tipc_netid(struct net *net) 136 { 137 return tipc_net(net)->net_id; 138 } 139 140 static inline struct list_head *tipc_nodes(struct net *net) 141 { 142 return &tipc_net(net)->node_list; 143 } 144 145 static inline struct name_table *tipc_name_table(struct net *net) 146 { 147 return tipc_net(net)->nametbl; 148 } 149 150 static inline struct tipc_topsrv *tipc_topsrv(struct net *net) 151 { 152 return tipc_net(net)->topsrv; 153 } 154 155 static inline unsigned int tipc_hashfn(u32 addr) 156 { 157 return addr & (NODE_HTABLE_SIZE - 1); 158 } 159 160 static inline u16 mod(u16 x) 161 { 162 return x & 0xffffu; 163 } 164 165 static inline int less_eq(u16 left, u16 right) 166 { 167 return mod(right - left) < 32768u; 168 } 169 170 static inline int more(u16 left, u16 right) 171 { 172 return !less_eq(left, right); 173 } 174 175 static inline int less(u16 left, u16 right) 176 { 177 return less_eq(left, right) && (mod(right) != mod(left)); 178 } 179 180 static inline int in_range(u16 val, u16 min, u16 max) 181 { 182 return !less(val, min) && !more(val, max); 183 } 184 185 #ifdef CONFIG_SYSCTL 186 int tipc_register_sysctl(void); 187 void tipc_unregister_sysctl(void); 188 #else 189 #define tipc_register_sysctl() 0 190 #define tipc_unregister_sysctl() 191 #endif 192 #endif 193