2 * net/tipc/bearer.h: Include file for TIPC bearer code
4 * Copyright (c) 1996-2006, 2013-2014, Ericsson AB
5 * Copyright (c) 2005, 2010-2011, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
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.
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.
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.
37 #ifndef _TIPC_BEARER_H
38 #define _TIPC_BEARER_H
42 #include <net/genetlink.h>
45 #define MAX_NODES 4096
48 /* Identifiers associated with TIPC message header media address info
49 * - address info field is 32 bytes long
50 * - the field's actual content and length is defined per media
51 * - remaining unused bytes in the field are set to zero
53 #define TIPC_MEDIA_INFO_SIZE 32
54 #define TIPC_MEDIA_TYPE_OFFSET 3
55 #define TIPC_MEDIA_ADDR_OFFSET 4
58 * Identifiers of supported TIPC media types
60 #define TIPC_MEDIA_TYPE_ETH 1
61 #define TIPC_MEDIA_TYPE_IB 2
62 #define TIPC_MEDIA_TYPE_UDP 3
65 * struct tipc_node_map - set of node identifiers
66 * @count: # of nodes in set
67 * @map: bitmap of node identifiers that are in the set
69 struct tipc_node_map {
71 u32 map[MAX_NODES / WSIZE];
75 * struct tipc_media_addr - destination address used by TIPC bearers
76 * @value: address info (format defined by media)
77 * @media_id: TIPC media type identifier
78 * @broadcast: non-zero if address is a broadcast address
80 struct tipc_media_addr {
81 u8 value[TIPC_MEDIA_INFO_SIZE];
89 * struct tipc_media - Media specific info exposed to generic bearer layer
90 * @send_msg: routine which handles buffer transmission
91 * @enable_media: routine which enables a media
92 * @disable_media: routine which disables a media
93 * @addr2str: convert media address format to string
94 * @addr2msg: convert from media addr format to discovery msg addr format
95 * @msg2addr: convert from discovery msg addr format to media addr format
96 * @raw2addr: convert from raw addr format to media addr format
97 * @priority: default link (and bearer) priority
98 * @tolerance: default time (in ms) before declaring link failure
99 * @window: default window (in packets) before declaring link congestion
100 * @type_id: TIPC media identifier
101 * @hwaddr_len: TIPC media address len
105 int (*send_msg)(struct net *net, struct sk_buff *buf,
106 struct tipc_bearer *b_ptr,
107 struct tipc_media_addr *dest);
108 int (*enable_media)(struct net *net, struct tipc_bearer *b_ptr,
109 struct nlattr *attr[]);
110 void (*disable_media)(struct tipc_bearer *b_ptr);
111 int (*addr2str)(struct tipc_media_addr *addr,
114 int (*addr2msg)(char *msg, struct tipc_media_addr *addr);
115 int (*msg2addr)(struct tipc_bearer *b,
116 struct tipc_media_addr *addr,
118 int (*raw2addr)(struct tipc_bearer *b,
119 struct tipc_media_addr *addr,
126 char name[TIPC_MAX_MEDIA_NAME];
130 * struct tipc_bearer - Generic TIPC bearer structure
131 * @media_ptr: pointer to additional media-specific information about bearer
132 * @mtu: max packet size bearer can support
133 * @addr: media-specific address associated with bearer
134 * @name: bearer name (format = media:interface)
135 * @media: ptr to media structure associated with bearer
136 * @bcast_addr: media address used in broadcasting
137 * @rcu: rcu struct for tipc_bearer
138 * @priority: default link priority for bearer
139 * @window: default window size for bearer
140 * @tolerance: default link tolerance for bearer
141 * @domain: network domain to which links can be established
142 * @identity: array index of this bearer within TIPC bearer array
143 * @link_req: ptr to (optional) structure making periodic link setup requests
144 * @net_plane: network plane ('A' through 'H') currently associated with bearer
145 * @nodes: indicates which nodes in cluster can be reached through bearer
147 * Note: media-specific code is responsible for initialization of the fields
148 * indicated below when a bearer is enabled; TIPC's generic bearer code takes
149 * care of initializing all other fields.
152 void __rcu *media_ptr; /* initalized by media */
153 u32 mtu; /* initalized by media */
154 struct tipc_media_addr addr; /* initalized by media */
155 char name[TIPC_MAX_BEARER_NAME];
156 struct tipc_media *media;
157 struct tipc_media_addr bcast_addr;
164 struct tipc_link_req *link_req;
166 struct tipc_node_map nodes;
169 struct tipc_bearer_names {
170 char media_name[TIPC_MAX_MEDIA_NAME];
171 char if_name[TIPC_MAX_IF_NAME];
175 * TIPC routines available to supported media types
178 void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr);
181 * Routines made available to TIPC by supported media types
183 extern struct tipc_media eth_media_info;
185 #ifdef CONFIG_TIPC_MEDIA_IB
186 extern struct tipc_media ib_media_info;
188 #ifdef CONFIG_TIPC_MEDIA_UDP
189 extern struct tipc_media udp_media_info;
192 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info);
193 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info);
194 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb);
195 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info);
196 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info);
198 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb);
199 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info);
200 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info);
202 int tipc_media_set_priority(const char *name, u32 new_value);
203 int tipc_media_set_window(const char *name, u32 new_value);
204 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a);
205 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b,
206 struct nlattr *attrs[]);
207 void tipc_disable_l2_media(struct tipc_bearer *b);
208 int tipc_l2_send_msg(struct net *net, struct sk_buff *buf,
209 struct tipc_bearer *b, struct tipc_media_addr *dest);
211 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest);
212 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest);
213 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name);
214 struct tipc_media *tipc_media_find(const char *name);
215 int tipc_bearer_setup(void);
216 void tipc_bearer_cleanup(void);
217 void tipc_bearer_stop(struct net *net);
218 void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf,
219 struct tipc_media_addr *dest);
221 #endif /* _TIPC_BEARER_H */