1/* 2 * net/tipc/core.h: Include file for TIPC global declarations 3 * 4 * Copyright (c) 2005-2006, 2013 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 <asm/hardirq.h> 53#include <linux/netdevice.h> 54#include <linux/in.h> 55#include <linux/list.h> 56#include <linux/slab.h> 57#include <linux/vmalloc.h> 58#include <linux/rtnetlink.h> 59#include <linux/etherdevice.h> 60#include <net/netns/generic.h> 61#include <linux/rhashtable.h> 62 63struct tipc_node; 64struct tipc_bearer; 65struct tipc_bc_base; 66struct tipc_link; 67struct tipc_name_table; 68struct tipc_server; 69 70#define TIPC_MOD_VER "2.0.0" 71 72#define NODE_HTABLE_SIZE 512 73#define MAX_BEARERS 3 74 75extern int tipc_net_id __read_mostly; 76extern int sysctl_tipc_rmem[3] __read_mostly; 77extern int sysctl_tipc_named_timeout __read_mostly; 78 79struct tipc_net { 80 u32 own_addr; 81 int net_id; 82 int random; 83 84 /* Node table and node list */ 85 spinlock_t node_list_lock; 86 struct hlist_head node_htable[NODE_HTABLE_SIZE]; 87 struct list_head node_list; 88 u32 num_nodes; 89 u32 num_links; 90 91 /* Bearer list */ 92 struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1]; 93 94 /* Broadcast link */ 95 spinlock_t bclock; 96 struct tipc_bc_base *bcbase; 97 struct tipc_link *bcl; 98 99 /* Socket hash table */ 100 struct rhashtable sk_rht; 101 102 /* Name table */ 103 spinlock_t nametbl_lock; 104 struct name_table *nametbl; 105 106 /* Topology subscription server */ 107 struct tipc_server *topsrv; 108 atomic_t subscription_count; 109}; 110 111static inline struct tipc_net *tipc_net(struct net *net) 112{ 113 return net_generic(net, tipc_net_id); 114} 115 116static inline int tipc_netid(struct net *net) 117{ 118 return tipc_net(net)->net_id; 119} 120 121static inline u16 mod(u16 x) 122{ 123 return x & 0xffffu; 124} 125 126static inline int less_eq(u16 left, u16 right) 127{ 128 return mod(right - left) < 32768u; 129} 130 131static inline int more(u16 left, u16 right) 132{ 133 return !less_eq(left, right); 134} 135 136static inline int less(u16 left, u16 right) 137{ 138 return less_eq(left, right) && (mod(right) != mod(left)); 139} 140 141static inline int in_range(u16 val, u16 min, u16 max) 142{ 143 return !less(val, min) && !more(val, max); 144} 145 146#ifdef CONFIG_SYSCTL 147int tipc_register_sysctl(void); 148void tipc_unregister_sysctl(void); 149#else 150#define tipc_register_sysctl() 0 151#define tipc_unregister_sysctl() 152#endif 153#endif 154