1 /* 2 * net/tipc/bearer.h: Include file for TIPC bearer code 3 * 4 * Copyright (c) 1996-2006, 2013-2014, Ericsson AB 5 * Copyright (c) 2005, 2010-2011, 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_BEARER_H 38 #define _TIPC_BEARER_H 39 40 #include "netlink.h" 41 #include <net/genetlink.h> 42 43 #define MAX_BEARERS 2 44 #define MAX_MEDIA 2 45 #define MAX_NODES 4096 46 #define WSIZE 32 47 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 52 */ 53 #define TIPC_MEDIA_ADDR_SIZE 32 54 #define TIPC_MEDIA_TYPE_OFFSET 3 55 56 /* 57 * Identifiers of supported TIPC media types 58 */ 59 #define TIPC_MEDIA_TYPE_ETH 1 60 #define TIPC_MEDIA_TYPE_IB 2 61 62 /** 63 * struct tipc_node_map - set of node identifiers 64 * @count: # of nodes in set 65 * @map: bitmap of node identifiers that are in the set 66 */ 67 struct tipc_node_map { 68 u32 count; 69 u32 map[MAX_NODES / WSIZE]; 70 }; 71 72 /** 73 * struct tipc_media_addr - destination address used by TIPC bearers 74 * @value: address info (format defined by media) 75 * @media_id: TIPC media type identifier 76 * @broadcast: non-zero if address is a broadcast address 77 */ 78 struct tipc_media_addr { 79 u8 value[TIPC_MEDIA_ADDR_SIZE]; 80 u8 media_id; 81 u8 broadcast; 82 }; 83 84 struct tipc_bearer; 85 86 /** 87 * struct tipc_media - Media specific info exposed to generic bearer layer 88 * @send_msg: routine which handles buffer transmission 89 * @enable_media: routine which enables a media 90 * @disable_media: routine which disables a media 91 * @addr2str: convert media address format to string 92 * @addr2msg: convert from media addr format to discovery msg addr format 93 * @msg2addr: convert from discovery msg addr format to media addr format 94 * @raw2addr: convert from raw addr format to media addr format 95 * @priority: default link (and bearer) priority 96 * @tolerance: default time (in ms) before declaring link failure 97 * @window: default window (in packets) before declaring link congestion 98 * @type_id: TIPC media identifier 99 * @hwaddr_len: TIPC media address len 100 * @name: media name 101 */ 102 struct tipc_media { 103 int (*send_msg)(struct net *net, struct sk_buff *buf, 104 struct tipc_bearer *b_ptr, 105 struct tipc_media_addr *dest); 106 int (*enable_media)(struct net *net, struct tipc_bearer *b_ptr); 107 void (*disable_media)(struct tipc_bearer *b_ptr); 108 int (*addr2str)(struct tipc_media_addr *addr, 109 char *strbuf, 110 int bufsz); 111 int (*addr2msg)(char *msg, struct tipc_media_addr *addr); 112 int (*msg2addr)(struct tipc_bearer *b, 113 struct tipc_media_addr *addr, 114 char *msg); 115 int (*raw2addr)(struct tipc_bearer *b, 116 struct tipc_media_addr *addr, 117 char *raw); 118 u32 priority; 119 u32 tolerance; 120 u32 window; 121 u32 type_id; 122 u32 hwaddr_len; 123 char name[TIPC_MAX_MEDIA_NAME]; 124 }; 125 126 /** 127 * struct tipc_bearer - Generic TIPC bearer structure 128 * @media_ptr: pointer to additional media-specific information about bearer 129 * @mtu: max packet size bearer can support 130 * @addr: media-specific address associated with bearer 131 * @name: bearer name (format = media:interface) 132 * @media: ptr to media structure associated with bearer 133 * @bcast_addr: media address used in broadcasting 134 * @rcu: rcu struct for tipc_bearer 135 * @priority: default link priority for bearer 136 * @window: default window size for bearer 137 * @tolerance: default link tolerance for bearer 138 * @domain: network domain to which links can be established 139 * @identity: array index of this bearer within TIPC bearer array 140 * @link_req: ptr to (optional) structure making periodic link setup requests 141 * @net_plane: network plane ('A' through 'H') currently associated with bearer 142 * @nodes: indicates which nodes in cluster can be reached through bearer 143 * 144 * Note: media-specific code is responsible for initialization of the fields 145 * indicated below when a bearer is enabled; TIPC's generic bearer code takes 146 * care of initializing all other fields. 147 */ 148 struct tipc_bearer { 149 void __rcu *media_ptr; /* initalized by media */ 150 u32 mtu; /* initalized by media */ 151 struct tipc_media_addr addr; /* initalized by media */ 152 char name[TIPC_MAX_BEARER_NAME]; 153 struct tipc_media *media; 154 struct tipc_media_addr bcast_addr; 155 struct rcu_head rcu; 156 u32 priority; 157 u32 window; 158 u32 tolerance; 159 u32 domain; 160 u32 identity; 161 struct tipc_link_req *link_req; 162 char net_plane; 163 struct tipc_node_map nodes; 164 }; 165 166 struct tipc_bearer_names { 167 char media_name[TIPC_MAX_MEDIA_NAME]; 168 char if_name[TIPC_MAX_IF_NAME]; 169 }; 170 171 /* 172 * TIPC routines available to supported media types 173 */ 174 175 void tipc_rcv(struct net *net, struct sk_buff *skb, struct tipc_bearer *b_ptr); 176 177 /* 178 * Routines made available to TIPC by supported media types 179 */ 180 extern struct tipc_media eth_media_info; 181 182 #ifdef CONFIG_TIPC_MEDIA_IB 183 extern struct tipc_media ib_media_info; 184 #endif 185 186 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info); 187 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info); 188 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb); 189 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info); 190 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info); 191 192 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb); 193 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info); 194 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info); 195 196 int tipc_media_set_priority(const char *name, u32 new_value); 197 int tipc_media_set_window(const char *name, u32 new_value); 198 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a); 199 int tipc_enable_l2_media(struct net *net, struct tipc_bearer *b); 200 void tipc_disable_l2_media(struct tipc_bearer *b); 201 int tipc_l2_send_msg(struct net *net, struct sk_buff *buf, 202 struct tipc_bearer *b, struct tipc_media_addr *dest); 203 204 void tipc_bearer_add_dest(struct net *net, u32 bearer_id, u32 dest); 205 void tipc_bearer_remove_dest(struct net *net, u32 bearer_id, u32 dest); 206 struct tipc_bearer *tipc_bearer_find(struct net *net, const char *name); 207 struct tipc_media *tipc_media_find(const char *name); 208 int tipc_bearer_setup(void); 209 void tipc_bearer_cleanup(void); 210 void tipc_bearer_stop(struct net *net); 211 void tipc_bearer_send(struct net *net, u32 bearer_id, struct sk_buff *buf, 212 struct tipc_media_addr *dest); 213 214 #endif /* _TIPC_BEARER_H */ 215