]>
Commit | Line | Data |
---|---|---|
b97bf3fd PL |
1 | /* |
2 | * net/tipc/bearer.h: Include file for TIPC bearer code | |
c4307285 | 3 | * |
593a5f22 | 4 | * Copyright (c) 1996-2006, Ericsson AB |
2d627b92 | 5 | * Copyright (c) 2005, 2010-2011, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #ifndef _TIPC_BEARER_H | |
38 | #define _TIPC_BEARER_H | |
39 | ||
b97bf3fd PL |
40 | #include "bcast.h" |
41 | ||
909234cd AS |
42 | #define MAX_BEARERS 2 |
43 | #define MAX_MEDIA 2 | |
b97bf3fd | 44 | |
4d163a32 AS |
45 | /* |
46 | * Identifiers associated with TIPC message header media address info | |
47 | * | |
48 | * - address info field is 20 bytes long | |
49 | * - media type identifier located at offset 3 | |
50 | * - remaining bytes vary according to media type | |
51 | */ | |
52 | ||
53 | #define TIPC_MEDIA_ADDR_SIZE 20 | |
54 | #define TIPC_MEDIA_TYPE_OFFSET 3 | |
55 | ||
d265fef6 AS |
56 | /* |
57 | * Identifiers of supported TIPC media types | |
58 | */ | |
59 | #define TIPC_MEDIA_TYPE_ETH 1 | |
60 | ||
61 | /* | |
3d749a6a AS |
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 | |
d265fef6 | 66 | */ |
3d749a6a | 67 | |
d265fef6 | 68 | struct tipc_media_addr { |
3d749a6a AS |
69 | u8 value[TIPC_MEDIA_ADDR_SIZE]; |
70 | u8 media_id; | |
71 | u8 broadcast; | |
d265fef6 AS |
72 | }; |
73 | ||
2d627b92 | 74 | struct tipc_bearer; |
b97bf3fd PL |
75 | |
76 | /** | |
77 | * struct media - TIPC media information available to internal users | |
78 | * @send_msg: routine which handles buffer transmission | |
79 | * @enable_bearer: routine which enables a bearer | |
80 | * @disable_bearer: routine which disables a bearer | |
4d163a32 AS |
81 | * @addr2str: routine which converts media address to string |
82 | * @str2addr: routine which converts media address from string | |
83 | * @addr2msg: routine which converts media address to protocol message area | |
84 | * @msg2addr: routine which converts media address from protocol message area | |
b97bf3fd | 85 | * @bcast_addr: media address used in broadcasting |
b97bf3fd PL |
86 | * @priority: default link (and bearer) priority |
87 | * @tolerance: default time (in ms) before declaring link failure | |
88 | * @window: default window (in packets) before declaring link congestion | |
d265fef6 | 89 | * @type_id: TIPC media identifier |
b97bf3fd PL |
90 | * @name: media name |
91 | */ | |
c4307285 | 92 | |
b97bf3fd | 93 | struct media { |
c4307285 | 94 | int (*send_msg)(struct sk_buff *buf, |
b97bf3fd PL |
95 | struct tipc_bearer *b_ptr, |
96 | struct tipc_media_addr *dest); | |
97 | int (*enable_bearer)(struct tipc_bearer *b_ptr); | |
98 | void (*disable_bearer)(struct tipc_bearer *b_ptr); | |
c61b666e | 99 | int (*addr2str)(struct tipc_media_addr *a, char *str_buf, int str_size); |
4d163a32 AS |
100 | int (*str2addr)(struct tipc_media_addr *a, char *str_buf); |
101 | int (*addr2msg)(struct tipc_media_addr *a, char *msg_area); | |
102 | int (*msg2addr)(struct tipc_media_addr *a, char *msg_area); | |
b97bf3fd | 103 | struct tipc_media_addr bcast_addr; |
b97bf3fd PL |
104 | u32 priority; |
105 | u32 tolerance; | |
106 | u32 window; | |
107 | u32 type_id; | |
108 | char name[TIPC_MAX_MEDIA_NAME]; | |
109 | }; | |
110 | ||
111 | /** | |
2d627b92 AS |
112 | * struct tipc_bearer - TIPC bearer structure |
113 | * @usr_handle: pointer to additional media-specific information about bearer | |
114 | * @mtu: max packet size bearer can support | |
115 | * @blocked: non-zero if bearer is blocked | |
116 | * @lock: spinlock for controlling access to bearer | |
117 | * @addr: media-specific address associated with bearer | |
118 | * @name: bearer name (format = media:interface) | |
b97bf3fd PL |
119 | * @media: ptr to media structure associated with bearer |
120 | * @priority: default link priority for bearer | |
b97bf3fd PL |
121 | * @identity: array index of this bearer within TIPC bearer array |
122 | * @link_req: ptr to (optional) structure making periodic link setup requests | |
123 | * @links: list of non-congested links associated with bearer | |
124 | * @cong_links: list of congested links associated with bearer | |
b97bf3fd PL |
125 | * @active: non-zero if bearer structure is represents a bearer |
126 | * @net_plane: network plane ('A' through 'H') currently associated with bearer | |
127 | * @nodes: indicates which nodes in cluster can be reached through bearer | |
2d627b92 AS |
128 | * |
129 | * Note: media-specific code is responsible for initialization of the fields | |
130 | * indicated below when a bearer is enabled; TIPC's generic bearer code takes | |
131 | * care of initializing all other fields. | |
b97bf3fd | 132 | */ |
2d627b92 AS |
133 | struct tipc_bearer { |
134 | void *usr_handle; /* initalized by media */ | |
135 | u32 mtu; /* initalized by media */ | |
136 | int blocked; /* initalized by media */ | |
137 | struct tipc_media_addr addr; /* initalized by media */ | |
138 | char name[TIPC_MAX_BEARER_NAME]; | |
139 | spinlock_t lock; | |
b97bf3fd PL |
140 | struct media *media; |
141 | u32 priority; | |
b97bf3fd PL |
142 | u32 identity; |
143 | struct link_req *link_req; | |
144 | struct list_head links; | |
145 | struct list_head cong_links; | |
b97bf3fd PL |
146 | int active; |
147 | char net_plane; | |
6c00055a | 148 | struct tipc_node_map nodes; |
b97bf3fd PL |
149 | }; |
150 | ||
151 | struct bearer_name { | |
152 | char media_name[TIPC_MAX_MEDIA_NAME]; | |
153 | char if_name[TIPC_MAX_IF_NAME]; | |
154 | }; | |
155 | ||
156 | struct link; | |
157 | ||
2d627b92 | 158 | extern struct tipc_bearer tipc_bearers[]; |
b97bf3fd | 159 | |
d265fef6 AS |
160 | /* |
161 | * TIPC routines available to supported media types | |
162 | */ | |
706767da | 163 | int tipc_register_media(struct media *m_ptr); |
d265fef6 AS |
164 | |
165 | void tipc_recv_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr); | |
166 | ||
167 | int tipc_block_bearer(const char *name); | |
168 | void tipc_continue(struct tipc_bearer *tb_ptr); | |
169 | ||
50d3e639 | 170 | int tipc_enable_bearer(const char *bearer_name, u32 disc_domain, u32 priority); |
d265fef6 AS |
171 | int tipc_disable_bearer(const char *name); |
172 | ||
173 | /* | |
174 | * Routines made available to TIPC by supported media types | |
175 | */ | |
176 | int tipc_eth_media_start(void); | |
177 | void tipc_eth_media_stop(void); | |
178 | ||
4323add6 PL |
179 | void tipc_media_addr_printf(struct print_buf *pb, struct tipc_media_addr *a); |
180 | struct sk_buff *tipc_media_get_names(void); | |
b97bf3fd | 181 | |
4323add6 | 182 | struct sk_buff *tipc_bearer_get_names(void); |
2d627b92 AS |
183 | void tipc_bearer_add_dest(struct tipc_bearer *b_ptr, u32 dest); |
184 | void tipc_bearer_remove_dest(struct tipc_bearer *b_ptr, u32 dest); | |
185 | void tipc_bearer_schedule(struct tipc_bearer *b_ptr, struct link *l_ptr); | |
186 | struct tipc_bearer *tipc_bearer_find_interface(const char *if_name); | |
187 | int tipc_bearer_resolve_congestion(struct tipc_bearer *b_ptr, struct link *l_ptr); | |
188 | int tipc_bearer_congested(struct tipc_bearer *b_ptr, struct link *l_ptr); | |
4323add6 | 189 | void tipc_bearer_stop(void); |
2d627b92 | 190 | void tipc_bearer_lock_push(struct tipc_bearer *b_ptr); |
b97bf3fd PL |
191 | |
192 | ||
193 | /** | |
c4307285 YH |
194 | * tipc_bearer_send- sends buffer to destination over bearer |
195 | * | |
b97bf3fd | 196 | * Returns true (1) if successful, or false (0) if unable to send |
c4307285 | 197 | * |
b97bf3fd PL |
198 | * IMPORTANT: |
199 | * The media send routine must not alter the buffer being passed in | |
200 | * as it may be needed for later retransmission! | |
c4307285 YH |
201 | * |
202 | * If the media send routine returns a non-zero value (indicating that | |
b97bf3fd PL |
203 | * it was unable to send the buffer), it must: |
204 | * 1) mark the bearer as blocked, | |
205 | * 2) call tipc_continue() once the bearer is able to send again. | |
206 | * Media types that are unable to meet these two critera must ensure their | |
207 | * send routine always returns success -- even if the buffer was not sent -- | |
c4307285 | 208 | * and let TIPC's link code deal with the undelivered message. |
b97bf3fd PL |
209 | */ |
210 | ||
2d627b92 AS |
211 | static inline int tipc_bearer_send(struct tipc_bearer *b_ptr, |
212 | struct sk_buff *buf, | |
4323add6 | 213 | struct tipc_media_addr *dest) |
b97bf3fd | 214 | { |
2d627b92 | 215 | return !b_ptr->media->send_msg(buf, b_ptr, dest); |
b97bf3fd PL |
216 | } |
217 | ||
b274f4ab | 218 | #endif /* _TIPC_BEARER_H */ |