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 "bcast.h" 41 #include "netlink.h" 42 #include <net/genetlink.h> 43 44 #define MAX_BEARERS 2 45 #define MAX_MEDIA 2 46 47 /* Identifiers associated with TIPC message header media address info 48 * - address info field is 32 bytes long 49 * - the field's actual content and length is defined per media 50 * - remaining unused bytes in the field are set to zero 51 */ 52 #define TIPC_MEDIA_ADDR_SIZE 32 53 #define TIPC_MEDIA_TYPE_OFFSET 3 54 55 /* 56 * Identifiers of supported TIPC media types 57 */ 58 #define TIPC_MEDIA_TYPE_ETH 1 59 #define TIPC_MEDIA_TYPE_IB 2 60 61 /** 62 * struct tipc_media_addr - destination address used by TIPC bearers 63 * @value: address info (format defined by media) 64 * @media_id: TIPC media type identifier 65 * @broadcast: non-zero if address is a broadcast address 66 */ 67 struct tipc_media_addr { 68 u8 value[TIPC_MEDIA_ADDR_SIZE]; 69 u8 media_id; 70 u8 broadcast; 71 }; 72 73 struct tipc_bearer; 74 75 /** 76 * struct tipc_media - Media specific info exposed to generic bearer layer 77 * @send_msg: routine which handles buffer transmission 78 * @enable_media: routine which enables a media 79 * @disable_media: routine which disables a media 80 * @addr2str: convert media address format to string 81 * @addr2msg: convert from media addr format to discovery msg addr format 82 * @msg2addr: convert from discovery msg addr format to media addr format 83 * @raw2addr: convert from raw addr format to media addr format 84 * @priority: default link (and bearer) priority 85 * @tolerance: default time (in ms) before declaring link failure 86 * @window: default window (in packets) before declaring link congestion 87 * @type_id: TIPC media identifier 88 * @hwaddr_len: TIPC media address len 89 * @name: media name 90 */ 91 struct tipc_media { 92 int (*send_msg)(struct sk_buff *buf, 93 struct tipc_bearer *b_ptr, 94 struct tipc_media_addr *dest); 95 int (*enable_media)(struct tipc_bearer *b_ptr); 96 void (*disable_media)(struct tipc_bearer *b_ptr); 97 int (*addr2str)(struct tipc_media_addr *addr, 98 char *strbuf, 99 int bufsz); 100 int (*addr2msg)(char *msg, struct tipc_media_addr *addr); 101 int (*msg2addr)(struct tipc_bearer *b, 102 struct tipc_media_addr *addr, 103 char *msg); 104 int (*raw2addr)(struct tipc_bearer *b, 105 struct tipc_media_addr *addr, 106 char *raw); 107 u32 priority; 108 u32 tolerance; 109 u32 window; 110 u32 type_id; 111 u32 hwaddr_len; 112 char name[TIPC_MAX_MEDIA_NAME]; 113 }; 114 115 /** 116 * struct tipc_bearer - Generic TIPC bearer structure 117 * @media_ptr: pointer to additional media-specific information about bearer 118 * @mtu: max packet size bearer can support 119 * @addr: media-specific address associated with bearer 120 * @name: bearer name (format = media:interface) 121 * @media: ptr to media structure associated with bearer 122 * @bcast_addr: media address used in broadcasting 123 * @rcu: rcu struct for tipc_bearer 124 * @priority: default link priority for bearer 125 * @window: default window size for bearer 126 * @tolerance: default link tolerance for bearer 127 * @domain: network domain to which links can be established 128 * @identity: array index of this bearer within TIPC bearer array 129 * @link_req: ptr to (optional) structure making periodic link setup requests 130 * @net_plane: network plane ('A' through 'H') currently associated with bearer 131 * @nodes: indicates which nodes in cluster can be reached through bearer 132 * 133 * Note: media-specific code is responsible for initialization of the fields 134 * indicated below when a bearer is enabled; TIPC's generic bearer code takes 135 * care of initializing all other fields. 136 */ 137 struct tipc_bearer { 138 void __rcu *media_ptr; /* initalized by media */ 139 u32 mtu; /* initalized by media */ 140 struct tipc_media_addr addr; /* initalized by media */ 141 char name[TIPC_MAX_BEARER_NAME]; 142 struct tipc_media *media; 143 struct tipc_media_addr bcast_addr; 144 struct rcu_head rcu; 145 u32 priority; 146 u32 window; 147 u32 tolerance; 148 u32 domain; 149 u32 identity; 150 struct tipc_link_req *link_req; 151 char net_plane; 152 struct tipc_node_map nodes; 153 }; 154 155 struct tipc_bearer_names { 156 char media_name[TIPC_MAX_MEDIA_NAME]; 157 char if_name[TIPC_MAX_IF_NAME]; 158 }; 159 160 struct tipc_link; 161 162 extern struct tipc_bearer __rcu *bearer_list[]; 163 164 /* 165 * TIPC routines available to supported media types 166 */ 167 168 void tipc_rcv(struct sk_buff *skb, struct tipc_bearer *tb_ptr); 169 int tipc_enable_bearer(const char *bearer_name, u32 disc_domain, u32 priority); 170 int tipc_disable_bearer(const char *name); 171 172 /* 173 * Routines made available to TIPC by supported media types 174 */ 175 extern struct tipc_media eth_media_info; 176 177 #ifdef CONFIG_TIPC_MEDIA_IB 178 extern struct tipc_media ib_media_info; 179 #endif 180 181 int tipc_nl_bearer_disable(struct sk_buff *skb, struct genl_info *info); 182 int tipc_nl_bearer_enable(struct sk_buff *skb, struct genl_info *info); 183 int tipc_nl_bearer_dump(struct sk_buff *skb, struct netlink_callback *cb); 184 int tipc_nl_bearer_get(struct sk_buff *skb, struct genl_info *info); 185 int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info); 186 187 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb); 188 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info); 189 int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info); 190 191 int tipc_media_set_priority(const char *name, u32 new_value); 192 int tipc_media_set_window(const char *name, u32 new_value); 193 void tipc_media_addr_printf(char *buf, int len, struct tipc_media_addr *a); 194 struct sk_buff *tipc_media_get_names(void); 195 int tipc_enable_l2_media(struct tipc_bearer *b); 196 void tipc_disable_l2_media(struct tipc_bearer *b); 197 int tipc_l2_send_msg(struct sk_buff *buf, struct tipc_bearer *b, 198 struct tipc_media_addr *dest); 199 200 struct sk_buff *tipc_bearer_get_names(void); 201 void tipc_bearer_add_dest(u32 bearer_id, u32 dest); 202 void tipc_bearer_remove_dest(u32 bearer_id, u32 dest); 203 struct tipc_bearer *tipc_bearer_find(const char *name); 204 struct tipc_media *tipc_media_find(const char *name); 205 int tipc_bearer_setup(void); 206 void tipc_bearer_cleanup(void); 207 void tipc_bearer_stop(void); 208 void tipc_bearer_send(u32 bearer_id, struct sk_buff *buf, 209 struct tipc_media_addr *dest); 210 211 #endif /* _TIPC_BEARER_H */ 212