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#ifdef pr_fmt 65#undef pr_fmt 66#endif 67 68#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 69 70struct tipc_node; 71struct tipc_bearer; 72struct tipc_bc_base; 73struct tipc_link; 74struct tipc_name_table; 75struct tipc_topsrv; 76struct tipc_monitor; 77#ifdef CONFIG_TIPC_CRYPTO 78struct tipc_crypto; 79#endif 80 81#define TIPC_MOD_VER "2.0.0" 82 83#define NODE_HTABLE_SIZE 512 84#define MAX_BEARERS 3 85#define TIPC_DEF_MON_THRESHOLD 32 86#define NODE_ID_LEN 16 87#define NODE_ID_STR_LEN (NODE_ID_LEN * 2 + 1) 88 89extern unsigned int tipc_net_id __read_mostly; 90extern int sysctl_tipc_rmem[3] __read_mostly; 91extern int sysctl_tipc_named_timeout __read_mostly; 92 93struct tipc_net { 94 u8 node_id[NODE_ID_LEN]; 95 u32 node_addr; 96 u32 trial_addr; 97 unsigned long addr_trial_end; 98 char node_id_string[NODE_ID_STR_LEN]; 99 int net_id; 100 int random; 101 bool legacy_addr_format; 102 103 /* 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; 107 u32 num_nodes; 108 u32 num_links; 109 110 /* Neighbor monitoring list */ 111 struct tipc_monitor *monitors[MAX_BEARERS]; 112 int mon_threshold; 113 114 /* Bearer list */ 115 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1]; 116 117 /* Broadcast link */ 118 spinlock_t bclock; 119 struct tipc_bc_base *bcbase; 120 struct tipc_link *bcl; 121 122 /* Socket hash table */ 123 struct rhashtable sk_rht; 124 125 /* Name table */ 126 spinlock_t nametbl_lock; 127 struct name_table *nametbl; 128 129 /* Name dist queue */ 130 struct list_head dist_queue; 131 132 /* Topology subscription server */ 133 struct tipc_topsrv *topsrv; 134 atomic_t subscription_count; 135 136 /* Cluster capabilities */ 137 u16 capabilities; 138 139 /* Tracing of node internal messages */ 140 struct packet_type loopback_pt; 141 142#ifdef CONFIG_TIPC_CRYPTO 143 /* TX crypto handler */ 144 struct tipc_crypto *crypto_tx; 145#endif 146 /* Work item for net finalize */ 147 struct work_struct work; 148 /* The numbers of work queues in schedule */ 149 atomic_t wq_count; 150}; 151 152static inline struct tipc_net *tipc_net(struct net *net) 153{ 154 return net_generic(net, tipc_net_id); 155} 156 157static inline int tipc_netid(struct net *net) 158{ 159 return tipc_net(net)->net_id; 160} 161 162static inline struct list_head *tipc_nodes(struct net *net) 163{ 164 return &tipc_net(net)->node_list; 165} 166 167static inline struct name_table *tipc_name_table(struct net *net) 168{ 169 return tipc_net(net)->nametbl; 170} 171 172static inline struct tipc_topsrv *tipc_topsrv(struct net *net) 173{ 174 return tipc_net(net)->topsrv; 175} 176 177static inline unsigned int tipc_hashfn(u32 addr) 178{ 179 return addr & (NODE_HTABLE_SIZE - 1); 180} 181 182static inline u16 mod(u16 x) 183{ 184 return x & 0xffffu; 185} 186 187static inline int less_eq(u16 left, u16 right) 188{ 189 return mod(right - left) < 32768u; 190} 191 192static inline int more(u16 left, u16 right) 193{ 194 return !less_eq(left, right); 195} 196 197static inline int less(u16 left, u16 right) 198{ 199 return less_eq(left, right) && (mod(right) != mod(left)); 200} 201 202static inline int in_range(u16 val, u16 min, u16 max) 203{ 204 return !less(val, min) && !more(val, max); 205} 206 207static inline u32 tipc_net_hash_mixes(struct net *net, int tn_rand) 208{ 209 return net_hash_mix(&init_net) ^ net_hash_mix(net) ^ tn_rand; 210} 211 212#ifdef CONFIG_SYSCTL 213int tipc_register_sysctl(void); 214void tipc_unregister_sysctl(void); 215#else 216#define tipc_register_sysctl() 0 217#define tipc_unregister_sysctl() 218#endif 219#endif 220