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TOMOYO Linux Cross Reference
Linux/net/tipc/core.h

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

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