Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/discover.c |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Per Liden | 9da1c8b | 2006-01-11 18:40:41 +0100 | [diff] [blame] | 4 | * Copyright (c) 2003-2006, Ericsson AB |
Allan Stephens | 3ba07e6 | 2006-06-25 23:53:47 -0700 | [diff] [blame] | 5 | * Copyright (c) 2005-2006, Wind River Systems |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 6 | * All rights reserved. |
| 7 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 8 | * Redistribution and use in source and binary forms, with or without |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 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. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 19 | * |
Per Liden | 9ea1fd3 | 2006-01-11 13:30:43 +0100 | [diff] [blame] | 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 |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | */ |
| 36 | |
| 37 | #include "core.h" |
| 38 | #include "dbg.h" |
| 39 | #include "link.h" |
| 40 | #include "zone.h" |
| 41 | #include "discover.h" |
| 42 | #include "port.h" |
| 43 | #include "name_table.h" |
| 44 | |
| 45 | #define TIPC_LINK_REQ_INIT 125 /* min delay during bearer start up */ |
| 46 | #define TIPC_LINK_REQ_FAST 2000 /* normal delay if bearer has no links */ |
| 47 | #define TIPC_LINK_REQ_SLOW 600000 /* normal delay if bearer has links */ |
| 48 | |
| 49 | #if 0 |
| 50 | #define GET_NODE_INFO 300 |
| 51 | #define GET_NODE_INFO_RESULT 301 |
| 52 | #define FORWARD_LINK_PROBE 302 |
| 53 | #define LINK_REQUEST_REJECTED 303 |
| 54 | #define LINK_REQUEST_ACCEPTED 304 |
| 55 | #define DROP_LINK_REQUEST 305 |
| 56 | #define CHECK_LINK_COUNT 306 |
| 57 | #endif |
| 58 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 59 | /* |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 60 | * TODO: Most of the inter-cluster setup stuff should be |
| 61 | * rewritten, and be made conformant with specification. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 62 | */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 63 | |
| 64 | |
| 65 | /** |
| 66 | * struct link_req - information about an ongoing link setup request |
| 67 | * @bearer: bearer issuing requests |
| 68 | * @dest: destination address for request messages |
| 69 | * @buf: request message to be (repeatedly) sent |
| 70 | * @timer: timer governing period between requests |
| 71 | * @timer_intv: current interval between requests (in ms) |
| 72 | */ |
| 73 | struct link_req { |
| 74 | struct bearer *bearer; |
| 75 | struct tipc_media_addr dest; |
| 76 | struct sk_buff *buf; |
| 77 | struct timer_list timer; |
| 78 | unsigned int timer_intv; |
| 79 | }; |
| 80 | |
| 81 | |
| 82 | #if 0 |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 83 | int disc_create_link(const struct tipc_link_create *argv) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 84 | { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 85 | /* |
| 86 | * Code for inter cluster link setup here |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 87 | */ |
| 88 | return TIPC_OK; |
| 89 | } |
| 90 | #endif |
| 91 | |
| 92 | /* |
| 93 | * disc_lost_link(): A link has lost contact |
| 94 | */ |
| 95 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 96 | void tipc_disc_link_event(u32 addr, char *name, int up) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 97 | { |
| 98 | if (in_own_cluster(addr)) |
| 99 | return; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 100 | /* |
| 101 | * Code for inter cluster link setup here |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 102 | */ |
| 103 | } |
| 104 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 105 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 106 | * tipc_disc_init_msg - initialize a link setup message |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 107 | * @type: message type (request or response) |
| 108 | * @req_links: number of links associated with message |
| 109 | * @dest_domain: network domain of node(s) which should respond to message |
| 110 | * @b_ptr: ptr to bearer issuing message |
| 111 | */ |
| 112 | |
Adrian Bunk | 988f088 | 2006-03-20 22:37:52 -0800 | [diff] [blame] | 113 | static struct sk_buff *tipc_disc_init_msg(u32 type, |
| 114 | u32 req_links, |
| 115 | u32 dest_domain, |
| 116 | struct bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 117 | { |
| 118 | struct sk_buff *buf = buf_acquire(DSC_H_SIZE); |
| 119 | struct tipc_msg *msg; |
| 120 | |
| 121 | if (buf) { |
| 122 | msg = buf_msg(buf); |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 123 | tipc_msg_init(msg, LINK_CONFIG, type, DSC_H_SIZE, dest_domain); |
Allan Stephens | 40aecb1 | 2008-06-04 17:54:48 -0700 | [diff] [blame] | 124 | msg_set_non_seq(msg, 1); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 125 | msg_set_req_links(msg, req_links); |
| 126 | msg_set_dest_domain(msg, dest_domain); |
| 127 | msg_set_bc_netid(msg, tipc_net_id); |
| 128 | msg_set_media_addr(msg, &b_ptr->publ.addr); |
| 129 | } |
| 130 | return buf; |
| 131 | } |
| 132 | |
| 133 | /** |
Allan Stephens | e91ed0b | 2006-10-16 21:44:59 -0700 | [diff] [blame] | 134 | * disc_dupl_alert - issue node address duplication alert |
| 135 | * @b_ptr: pointer to bearer detecting duplication |
| 136 | * @node_addr: duplicated node address |
| 137 | * @media_addr: media address advertised by duplicated node |
| 138 | */ |
| 139 | |
| 140 | static void disc_dupl_alert(struct bearer *b_ptr, u32 node_addr, |
| 141 | struct tipc_media_addr *media_addr) |
| 142 | { |
| 143 | char node_addr_str[16]; |
| 144 | char media_addr_str[64]; |
| 145 | struct print_buf pb; |
| 146 | |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 147 | tipc_addr_string_fill(node_addr_str, node_addr); |
Allan Stephens | e91ed0b | 2006-10-16 21:44:59 -0700 | [diff] [blame] | 148 | tipc_printbuf_init(&pb, media_addr_str, sizeof(media_addr_str)); |
| 149 | tipc_media_addr_printf(&pb, media_addr); |
| 150 | tipc_printbuf_validate(&pb); |
| 151 | warn("Duplicate %s using %s seen on <%s>\n", |
| 152 | node_addr_str, media_addr_str, b_ptr->publ.name); |
| 153 | } |
| 154 | |
| 155 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 156 | * tipc_disc_recv_msg - handle incoming link setup message (request or response) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 157 | * @buf: buffer containing message |
Allan Stephens | 1265a02 | 2008-06-04 17:32:35 -0700 | [diff] [blame] | 158 | * @b_ptr: bearer that message arrived on |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 159 | */ |
| 160 | |
Allan Stephens | 1265a02 | 2008-06-04 17:32:35 -0700 | [diff] [blame] | 161 | void tipc_disc_recv_msg(struct sk_buff *buf, struct bearer *b_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 162 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 163 | struct link *link; |
| 164 | struct tipc_media_addr media_addr; |
| 165 | struct tipc_msg *msg = buf_msg(buf); |
| 166 | u32 dest = msg_dest_domain(msg); |
| 167 | u32 orig = msg_prevnode(msg); |
| 168 | u32 net_id = msg_bc_netid(msg); |
| 169 | u32 type = msg_type(msg); |
| 170 | |
| 171 | msg_get_media_addr(msg,&media_addr); |
| 172 | msg_dbg(msg, "RECV:"); |
| 173 | buf_discard(buf); |
| 174 | |
| 175 | if (net_id != tipc_net_id) |
| 176 | return; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 177 | if (!tipc_addr_domain_valid(dest)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 178 | return; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 179 | if (!tipc_addr_node_valid(orig)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 180 | return; |
Allan Stephens | e91ed0b | 2006-10-16 21:44:59 -0700 | [diff] [blame] | 181 | if (orig == tipc_own_addr) { |
| 182 | if (memcmp(&media_addr, &b_ptr->publ.addr, sizeof(media_addr))) |
| 183 | disc_dupl_alert(b_ptr, tipc_own_addr, &media_addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 184 | return; |
Allan Stephens | e91ed0b | 2006-10-16 21:44:59 -0700 | [diff] [blame] | 185 | } |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 186 | if (!tipc_in_scope(dest, tipc_own_addr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 187 | return; |
| 188 | if (is_slave(tipc_own_addr) && is_slave(orig)) |
| 189 | return; |
| 190 | if (is_slave(orig) && !in_own_cluster(orig)) |
| 191 | return; |
| 192 | if (in_own_cluster(orig)) { |
| 193 | /* Always accept link here */ |
| 194 | struct sk_buff *rbuf; |
| 195 | struct tipc_media_addr *addr; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 196 | struct tipc_node *n_ptr = tipc_node_find(orig); |
Allan Stephens | 2de07f6 | 2006-10-16 21:57:13 -0700 | [diff] [blame] | 197 | int link_fully_up; |
| 198 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 199 | dbg(" in own cluster\n"); |
| 200 | if (n_ptr == NULL) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 201 | n_ptr = tipc_node_create(orig); |
Allan Stephens | 811102c | 2008-05-21 14:53:34 -0700 | [diff] [blame] | 202 | if (!n_ptr) |
| 203 | return; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 204 | } |
| 205 | spin_lock_bh(&n_ptr->lock); |
| 206 | link = n_ptr->links[b_ptr->identity]; |
| 207 | if (!link) { |
| 208 | dbg("creating link\n"); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 209 | link = tipc_link_create(b_ptr, orig, &media_addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 210 | if (!link) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 211 | spin_unlock_bh(&n_ptr->lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 212 | return; |
| 213 | } |
| 214 | } |
| 215 | addr = &link->media_addr; |
| 216 | if (memcmp(addr, &media_addr, sizeof(*addr))) { |
Allan Stephens | e91ed0b | 2006-10-16 21:44:59 -0700 | [diff] [blame] | 217 | if (tipc_link_is_up(link) || (!link->started)) { |
| 218 | disc_dupl_alert(b_ptr, orig, &media_addr); |
| 219 | spin_unlock_bh(&n_ptr->lock); |
| 220 | return; |
| 221 | } |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 222 | warn("Resetting link <%s>, peer interface address changed\n", |
| 223 | link->name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 224 | memcpy(addr, &media_addr, sizeof(*addr)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 225 | tipc_link_reset(link); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 226 | } |
Allan Stephens | 01fee25 | 2010-05-11 14:30:11 +0000 | [diff] [blame] | 227 | link_fully_up = link_working_working(link); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 228 | spin_unlock_bh(&n_ptr->lock); |
Allan Stephens | 2de07f6 | 2006-10-16 21:57:13 -0700 | [diff] [blame] | 229 | if ((type == DSC_RESP_MSG) || link_fully_up) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 230 | return; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 231 | rbuf = tipc_disc_init_msg(DSC_RESP_MSG, 1, orig, b_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 232 | if (rbuf != NULL) { |
| 233 | msg_dbg(buf_msg(rbuf),"SEND:"); |
| 234 | b_ptr->media->send_msg(rbuf, &b_ptr->publ, &media_addr); |
| 235 | buf_discard(rbuf); |
| 236 | } |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 241 | * tipc_disc_stop_link_req - stop sending periodic link setup requests |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 242 | * @req: ptr to link request structure |
| 243 | */ |
| 244 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 245 | void tipc_disc_stop_link_req(struct link_req *req) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 246 | { |
| 247 | if (!req) |
| 248 | return; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 249 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 250 | k_cancel_timer(&req->timer); |
| 251 | k_term_timer(&req->timer); |
| 252 | buf_discard(req->buf); |
| 253 | kfree(req); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 254 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 255 | |
| 256 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 257 | * tipc_disc_update_link_req - update frequency of periodic link setup requests |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 258 | * @req: ptr to link request structure |
| 259 | */ |
| 260 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 261 | void tipc_disc_update_link_req(struct link_req *req) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 262 | { |
| 263 | if (!req) |
| 264 | return; |
| 265 | |
| 266 | if (req->timer_intv == TIPC_LINK_REQ_SLOW) { |
| 267 | if (!req->bearer->nodes.count) { |
| 268 | req->timer_intv = TIPC_LINK_REQ_FAST; |
| 269 | k_start_timer(&req->timer, req->timer_intv); |
| 270 | } |
| 271 | } else if (req->timer_intv == TIPC_LINK_REQ_FAST) { |
| 272 | if (req->bearer->nodes.count) { |
| 273 | req->timer_intv = TIPC_LINK_REQ_SLOW; |
| 274 | k_start_timer(&req->timer, req->timer_intv); |
| 275 | } |
| 276 | } else { |
| 277 | /* leave timer "as is" if haven't yet reached a "normal" rate */ |
| 278 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 279 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 280 | |
| 281 | /** |
| 282 | * disc_timeout - send a periodic link setup request |
| 283 | * @req: ptr to link request structure |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 284 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 285 | * Called whenever a link setup request timer associated with a bearer expires. |
| 286 | */ |
| 287 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 288 | static void disc_timeout(struct link_req *req) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 289 | { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 290 | spin_lock_bh(&req->bearer->publ.lock); |
| 291 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 292 | req->bearer->media->send_msg(req->buf, &req->bearer->publ, &req->dest); |
| 293 | |
| 294 | if ((req->timer_intv == TIPC_LINK_REQ_SLOW) || |
| 295 | (req->timer_intv == TIPC_LINK_REQ_FAST)) { |
| 296 | /* leave timer interval "as is" if already at a "normal" rate */ |
| 297 | } else { |
| 298 | req->timer_intv *= 2; |
Allan Stephens | 3ba07e6 | 2006-06-25 23:53:47 -0700 | [diff] [blame] | 299 | if (req->timer_intv > TIPC_LINK_REQ_FAST) |
| 300 | req->timer_intv = TIPC_LINK_REQ_FAST; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 301 | if ((req->timer_intv == TIPC_LINK_REQ_FAST) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 302 | (req->bearer->nodes.count)) |
| 303 | req->timer_intv = TIPC_LINK_REQ_SLOW; |
| 304 | } |
| 305 | k_start_timer(&req->timer, req->timer_intv); |
| 306 | |
| 307 | spin_unlock_bh(&req->bearer->publ.lock); |
| 308 | } |
| 309 | |
| 310 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 311 | * tipc_disc_init_link_req - start sending periodic link setup requests |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 312 | * @b_ptr: ptr to bearer issuing requests |
| 313 | * @dest: destination address for request messages |
| 314 | * @dest_domain: network domain of node(s) which should respond to message |
| 315 | * @req_links: max number of desired links |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 316 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 317 | * Returns pointer to link request structure, or NULL if unable to create. |
| 318 | */ |
| 319 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 320 | struct link_req *tipc_disc_init_link_req(struct bearer *b_ptr, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 321 | const struct tipc_media_addr *dest, |
| 322 | u32 dest_domain, |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 323 | u32 req_links) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 324 | { |
| 325 | struct link_req *req; |
| 326 | |
Panagiotis Issaris | 9df3f3d | 2006-07-21 15:52:20 -0700 | [diff] [blame] | 327 | req = kmalloc(sizeof(*req), GFP_ATOMIC); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 328 | if (!req) |
| 329 | return NULL; |
| 330 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 331 | req->buf = tipc_disc_init_msg(DSC_REQ_MSG, req_links, dest_domain, b_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 332 | if (!req->buf) { |
| 333 | kfree(req); |
| 334 | return NULL; |
| 335 | } |
| 336 | |
| 337 | memcpy(&req->dest, dest, sizeof(*dest)); |
| 338 | req->bearer = b_ptr; |
| 339 | req->timer_intv = TIPC_LINK_REQ_INIT; |
| 340 | k_init_timer(&req->timer, (Handler)disc_timeout, (unsigned long)req); |
| 341 | k_start_timer(&req->timer, req->timer_intv); |
| 342 | return req; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 343 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 344 | |