Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * net/tipc/node.c: TIPC node management routines |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 3 | * |
Per Liden | 593a5f2 | 2006-01-11 19:14:19 +0100 | [diff] [blame] | 4 | * Copyright (c) 2000-2006, Ericsson AB |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -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 "config.h" |
| 39 | #include "node.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 40 | #include "name_distr.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 41 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 42 | static void node_lost_contact(struct tipc_node *n_ptr); |
| 43 | static void node_established_contact(struct tipc_node *n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 44 | |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 45 | static DEFINE_SPINLOCK(node_create_lock); |
| 46 | |
Allan Stephens | e3ec9c7 | 2010-12-31 18:59:34 +0000 | [diff] [blame^] | 47 | u32 tipc_own_tag; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 48 | |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 49 | /** |
| 50 | * tipc_node_create - create neighboring node |
| 51 | * |
| 52 | * Currently, this routine is called by neighbor discovery code, which holds |
| 53 | * net_lock for reading only. We must take node_create_lock to ensure a node |
| 54 | * isn't created twice if two different bearers discover the node at the same |
| 55 | * time. (It would be preferable to switch to holding net_lock in write mode, |
| 56 | * but this is a non-trivial change.) |
| 57 | */ |
| 58 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 59 | struct tipc_node *tipc_node_create(u32 addr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 60 | { |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 61 | struct tipc_node *n_ptr; |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 62 | u32 n_num; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 63 | |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 64 | spin_lock_bh(&node_create_lock); |
| 65 | |
Allan Stephens | 5af5479 | 2010-12-31 18:59:23 +0000 | [diff] [blame] | 66 | n_ptr = tipc_node_find(addr); |
| 67 | if (n_ptr) { |
| 68 | spin_unlock_bh(&node_create_lock); |
| 69 | return n_ptr; |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 70 | } |
| 71 | |
Allan Stephens | 5af5479 | 2010-12-31 18:59:23 +0000 | [diff] [blame] | 72 | n_ptr = kzalloc(sizeof(*n_ptr), GFP_ATOMIC); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 73 | if (!n_ptr) { |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 74 | spin_unlock_bh(&node_create_lock); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 75 | warn("Node creation failed, no memory\n"); |
| 76 | return NULL; |
| 77 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 78 | |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 79 | n_ptr->addr = addr; |
Allan Stephens | 51a8e4d | 2010-12-31 18:59:18 +0000 | [diff] [blame] | 80 | spin_lock_init(&n_ptr->lock); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 81 | INIT_LIST_HEAD(&n_ptr->nsub); |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 82 | |
| 83 | n_num = tipc_node(addr); |
| 84 | tipc_net.nodes[n_num] = n_ptr; |
| 85 | if (n_num > tipc_net.highest_node) |
| 86 | tipc_net.highest_node = n_num; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 87 | |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 88 | spin_unlock_bh(&node_create_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 89 | return n_ptr; |
| 90 | } |
| 91 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 92 | void tipc_node_delete(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 93 | { |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 94 | u32 n_num; |
| 95 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 96 | if (!n_ptr) |
| 97 | return; |
| 98 | |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 99 | n_num = tipc_node(n_ptr->addr); |
| 100 | tipc_net.nodes[n_num] = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 101 | kfree(n_ptr); |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 102 | |
| 103 | while (!tipc_net.nodes[tipc_net.highest_node]) |
| 104 | if (--tipc_net.highest_node == 0) |
| 105 | break; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | |
| 109 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 110 | * tipc_node_link_up - handle addition of link |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 111 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 112 | * Link becomes active (alone or shared) or standby, depending on its priority. |
| 113 | */ |
| 114 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 115 | void tipc_node_link_up(struct tipc_node *n_ptr, struct link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 116 | { |
| 117 | struct link **active = &n_ptr->active_links[0]; |
| 118 | |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 119 | n_ptr->working_links++; |
| 120 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 121 | info("Established link <%s> on network plane %c\n", |
| 122 | l_ptr->name, l_ptr->b_ptr->net_plane); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 123 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 124 | if (!active[0]) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 125 | active[0] = active[1] = l_ptr; |
| 126 | node_established_contact(n_ptr); |
| 127 | return; |
| 128 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 129 | if (l_ptr->priority < active[0]->priority) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 130 | info("New link <%s> becomes standby\n", l_ptr->name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 131 | return; |
| 132 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 133 | tipc_link_send_duplicate(active[0], l_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 134 | if (l_ptr->priority == active[0]->priority) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 135 | active[0] = l_ptr; |
| 136 | return; |
| 137 | } |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 138 | info("Old link <%s> becomes standby\n", active[0]->name); |
| 139 | if (active[1] != active[0]) |
| 140 | info("Old link <%s> becomes standby\n", active[1]->name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 141 | active[0] = active[1] = l_ptr; |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * node_select_active_links - select active link |
| 146 | */ |
| 147 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 148 | static void node_select_active_links(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 149 | { |
| 150 | struct link **active = &n_ptr->active_links[0]; |
| 151 | u32 i; |
| 152 | u32 highest_prio = 0; |
| 153 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 154 | active[0] = active[1] = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 155 | |
| 156 | for (i = 0; i < MAX_BEARERS; i++) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 157 | struct link *l_ptr = n_ptr->links[i]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 158 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 159 | if (!l_ptr || !tipc_link_is_up(l_ptr) || |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 160 | (l_ptr->priority < highest_prio)) |
| 161 | continue; |
| 162 | |
| 163 | if (l_ptr->priority > highest_prio) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 164 | highest_prio = l_ptr->priority; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 165 | active[0] = active[1] = l_ptr; |
| 166 | } else { |
| 167 | active[1] = l_ptr; |
| 168 | } |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 173 | * tipc_node_link_down - handle loss of link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 174 | */ |
| 175 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 176 | void tipc_node_link_down(struct tipc_node *n_ptr, struct link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 177 | { |
| 178 | struct link **active; |
| 179 | |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 180 | n_ptr->working_links--; |
| 181 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 182 | if (!tipc_link_is_active(l_ptr)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 183 | info("Lost standby link <%s> on network plane %c\n", |
| 184 | l_ptr->name, l_ptr->b_ptr->net_plane); |
| 185 | return; |
| 186 | } |
| 187 | info("Lost link <%s> on network plane %c\n", |
| 188 | l_ptr->name, l_ptr->b_ptr->net_plane); |
| 189 | |
| 190 | active = &n_ptr->active_links[0]; |
| 191 | if (active[0] == l_ptr) |
| 192 | active[0] = active[1]; |
| 193 | if (active[1] == l_ptr) |
| 194 | active[1] = active[0]; |
| 195 | if (active[0] == l_ptr) |
| 196 | node_select_active_links(n_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 197 | if (tipc_node_is_up(n_ptr)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 198 | tipc_link_changeover(l_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 199 | else |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 200 | node_lost_contact(n_ptr); |
| 201 | } |
| 202 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 203 | int tipc_node_has_active_links(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 204 | { |
Allan Stephens | 76ae0d7 | 2010-08-17 11:00:12 +0000 | [diff] [blame] | 205 | return n_ptr->active_links[0] != NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 206 | } |
| 207 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 208 | int tipc_node_has_redundant_links(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 209 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 210 | return n_ptr->working_links > 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 211 | } |
| 212 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 213 | int tipc_node_is_up(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 214 | { |
Allan Stephens | 51a8e4d | 2010-12-31 18:59:18 +0000 | [diff] [blame] | 215 | return tipc_node_has_active_links(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 216 | } |
| 217 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 218 | struct tipc_node *tipc_node_attach_link(struct link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 219 | { |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 220 | struct tipc_node *n_ptr = tipc_node_find(l_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 221 | |
| 222 | if (!n_ptr) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 223 | n_ptr = tipc_node_create(l_ptr->addr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 224 | if (n_ptr) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 225 | u32 bearer_id = l_ptr->b_ptr->identity; |
| 226 | char addr_string[16]; |
| 227 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 228 | if (n_ptr->link_cnt >= 2) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 229 | err("Attempt to create third link to %s\n", |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 230 | tipc_addr_string_fill(addr_string, n_ptr->addr)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 231 | return NULL; |
| 232 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 233 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 234 | if (!n_ptr->links[bearer_id]) { |
| 235 | n_ptr->links[bearer_id] = l_ptr; |
Allan Stephens | 51f98a8 | 2010-12-31 18:59:16 +0000 | [diff] [blame] | 236 | tipc_net.links++; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 237 | n_ptr->link_cnt++; |
| 238 | return n_ptr; |
| 239 | } |
Frans Pop | a570f09 | 2010-03-24 07:57:29 +0000 | [diff] [blame] | 240 | err("Attempt to establish second link on <%s> to %s\n", |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 241 | l_ptr->b_ptr->publ.name, |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 242 | tipc_addr_string_fill(addr_string, l_ptr->addr)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 243 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 244 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 245 | } |
| 246 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 247 | void tipc_node_detach_link(struct tipc_node *n_ptr, struct link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 248 | { |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 249 | n_ptr->links[l_ptr->b_ptr->identity] = NULL; |
Allan Stephens | 51f98a8 | 2010-12-31 18:59:16 +0000 | [diff] [blame] | 250 | tipc_net.links--; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 251 | n_ptr->link_cnt--; |
| 252 | } |
| 253 | |
| 254 | /* |
| 255 | * Routing table management - five cases to handle: |
| 256 | * |
| 257 | * 1: A link towards a zone/cluster external node comes up. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 258 | * => Send a multicast message updating routing tables of all |
| 259 | * system nodes within own cluster that the new destination |
| 260 | * can be reached via this node. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 261 | * (node.establishedContact()=>cluster.multicastNewRoute()) |
| 262 | * |
| 263 | * 2: A link towards a slave node comes up. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 264 | * => Send a multicast message updating routing tables of all |
| 265 | * system nodes within own cluster that the new destination |
| 266 | * can be reached via this node. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 267 | * (node.establishedContact()=>cluster.multicastNewRoute()) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 268 | * => Send a message to the slave node about existence |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 269 | * of all system nodes within cluster: |
| 270 | * (node.establishedContact()=>cluster.sendLocalRoutes()) |
| 271 | * |
| 272 | * 3: A new cluster local system node becomes available. |
| 273 | * => Send message(s) to this particular node containing |
| 274 | * information about all cluster external and slave |
| 275 | * nodes which can be reached via this node. |
| 276 | * (node.establishedContact()==>network.sendExternalRoutes()) |
| 277 | * (node.establishedContact()==>network.sendSlaveRoutes()) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 278 | * => Send messages to all directly connected slave nodes |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 279 | * containing information about the existence of the new node |
| 280 | * (node.establishedContact()=>cluster.multicastNewRoute()) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 281 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 282 | * 4: The link towards a zone/cluster external node or slave |
| 283 | * node goes down. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 284 | * => Send a multcast message updating routing tables of all |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 285 | * nodes within cluster that the new destination can not any |
| 286 | * longer be reached via this node. |
| 287 | * (node.lostAllLinks()=>cluster.bcastLostRoute()) |
| 288 | * |
| 289 | * 5: A cluster local system node becomes unavailable. |
| 290 | * => Remove all references to this node from the local |
| 291 | * routing tables. Note: This is a completely node |
| 292 | * local operation. |
| 293 | * (node.lostAllLinks()=>network.removeAsRouter()) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 294 | * => Send messages to all directly connected slave nodes |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 295 | * containing information about loss of the node |
| 296 | * (node.establishedContact()=>cluster.multicastLostRoute()) |
| 297 | * |
| 298 | */ |
| 299 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 300 | static void node_established_contact(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 301 | { |
Allan Stephens | 51a8e4d | 2010-12-31 18:59:18 +0000 | [diff] [blame] | 302 | tipc_k_signal((Handler)tipc_named_node_up, n_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 303 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 304 | /* Syncronize broadcast acks */ |
| 305 | n_ptr->bclink.acked = tipc_bclink_get_last_sent(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 306 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 307 | if (n_ptr->bclink.supported) { |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 308 | tipc_nmap_add(&tipc_bcast_nmap, n_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 309 | if (n_ptr->addr < tipc_own_addr) |
| 310 | tipc_own_tag++; |
| 311 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 312 | } |
| 313 | |
Allan Stephens | 5a68d5ee | 2010-08-17 11:00:16 +0000 | [diff] [blame] | 314 | static void node_cleanup_finished(unsigned long node_addr) |
| 315 | { |
| 316 | struct tipc_node *n_ptr; |
| 317 | |
| 318 | read_lock_bh(&tipc_net_lock); |
| 319 | n_ptr = tipc_node_find(node_addr); |
| 320 | if (n_ptr) { |
| 321 | tipc_node_lock(n_ptr); |
| 322 | n_ptr->cleanup_required = 0; |
| 323 | tipc_node_unlock(n_ptr); |
| 324 | } |
| 325 | read_unlock_bh(&tipc_net_lock); |
| 326 | } |
| 327 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 328 | static void node_lost_contact(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 329 | { |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 330 | struct tipc_node_subscr *ns, *tns; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 331 | char addr_string[16]; |
| 332 | u32 i; |
| 333 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 334 | /* Clean up broadcast reception remains */ |
| 335 | n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = 0; |
| 336 | while (n_ptr->bclink.deferred_head) { |
Allan Stephens | 0e65967 | 2010-12-31 18:59:32 +0000 | [diff] [blame] | 337 | struct sk_buff *buf = n_ptr->bclink.deferred_head; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 338 | n_ptr->bclink.deferred_head = buf->next; |
| 339 | buf_discard(buf); |
| 340 | } |
| 341 | if (n_ptr->bclink.defragm) { |
| 342 | buf_discard(n_ptr->bclink.defragm); |
| 343 | n_ptr->bclink.defragm = NULL; |
| 344 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 345 | |
Allan Stephens | 51a8e4d | 2010-12-31 18:59:18 +0000 | [diff] [blame] | 346 | if (n_ptr->bclink.supported) { |
Allan Stephens | 8f92df6 | 2010-12-31 18:59:19 +0000 | [diff] [blame] | 347 | tipc_bclink_acknowledge(n_ptr, |
| 348 | mod(n_ptr->bclink.acked + 10000)); |
| 349 | tipc_nmap_remove(&tipc_bcast_nmap, n_ptr->addr); |
Allan Stephens | 51a8e4d | 2010-12-31 18:59:18 +0000 | [diff] [blame] | 350 | if (n_ptr->addr < tipc_own_addr) |
| 351 | tipc_own_tag--; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 352 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 353 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 354 | info("Lost contact with %s\n", |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 355 | tipc_addr_string_fill(addr_string, n_ptr->addr)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 356 | |
| 357 | /* Abort link changeover */ |
| 358 | for (i = 0; i < MAX_BEARERS; i++) { |
| 359 | struct link *l_ptr = n_ptr->links[i]; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 360 | if (!l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 361 | continue; |
| 362 | l_ptr->reset_checkpoint = l_ptr->next_in_no; |
| 363 | l_ptr->exp_msg_count = 0; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 364 | tipc_link_reset_fragments(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 365 | } |
| 366 | |
| 367 | /* Notify subscribers */ |
| 368 | list_for_each_entry_safe(ns, tns, &n_ptr->nsub, nodesub_list) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 369 | ns->node = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 370 | list_del_init(&ns->nodesub_list); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 371 | tipc_k_signal((Handler)ns->handle_node_down, |
| 372 | (unsigned long)ns->usr_handle); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 373 | } |
Allan Stephens | 5a68d5ee | 2010-08-17 11:00:16 +0000 | [diff] [blame] | 374 | |
| 375 | /* Prevent re-contact with node until all cleanup is done */ |
| 376 | |
| 377 | n_ptr->cleanup_required = 1; |
| 378 | tipc_k_signal((Handler)node_cleanup_finished, n_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 379 | } |
| 380 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 381 | struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 382 | { |
| 383 | u32 domain; |
| 384 | struct sk_buff *buf; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 385 | struct tipc_node *n_ptr; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 386 | struct tipc_node_info node_info; |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 387 | u32 payload_size; |
Allan Stephens | 5af5479 | 2010-12-31 18:59:23 +0000 | [diff] [blame] | 388 | u32 n_num; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 389 | |
| 390 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 391 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 392 | |
Al Viro | 3e6c8cd | 2006-11-08 00:19:09 -0800 | [diff] [blame] | 393 | domain = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 394 | if (!tipc_addr_domain_valid(domain)) |
| 395 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 396 | " (network address)"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 397 | |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 398 | read_lock_bh(&tipc_net_lock); |
Allan Stephens | 5af5479 | 2010-12-31 18:59:23 +0000 | [diff] [blame] | 399 | if (!tipc_net.nodes) { |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 400 | read_unlock_bh(&tipc_net_lock); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 401 | return tipc_cfg_reply_none(); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 402 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 403 | |
Allan Stephens | 08c80e9 | 2010-12-31 18:59:17 +0000 | [diff] [blame] | 404 | /* For now, get space for all other nodes */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 405 | |
Allan Stephens | 5af5479 | 2010-12-31 18:59:23 +0000 | [diff] [blame] | 406 | payload_size = TLV_SPACE(sizeof(node_info)) * |
| 407 | (tipc_net.highest_node - 1); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 408 | if (payload_size > 32768u) { |
| 409 | read_unlock_bh(&tipc_net_lock); |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 410 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
| 411 | " (too many nodes)"); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 412 | } |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 413 | buf = tipc_cfg_reply_alloc(payload_size); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 414 | if (!buf) { |
| 415 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 416 | return NULL; |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 417 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 418 | |
| 419 | /* Add TLVs for all nodes in scope */ |
| 420 | |
Allan Stephens | 5af5479 | 2010-12-31 18:59:23 +0000 | [diff] [blame] | 421 | for (n_num = 1; n_num <= tipc_net.highest_node; n_num++) { |
| 422 | n_ptr = tipc_net.nodes[n_num]; |
| 423 | if (!n_ptr || !tipc_in_scope(domain, n_ptr->addr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 424 | continue; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 425 | node_info.addr = htonl(n_ptr->addr); |
| 426 | node_info.up = htonl(tipc_node_is_up(n_ptr)); |
| 427 | tipc_cfg_append_tlv(buf, TIPC_TLV_NODE_INFO, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 428 | &node_info, sizeof(node_info)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 429 | } |
| 430 | |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 431 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 432 | return buf; |
| 433 | } |
| 434 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 435 | struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 436 | { |
| 437 | u32 domain; |
| 438 | struct sk_buff *buf; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 439 | struct tipc_node *n_ptr; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 440 | struct tipc_link_info link_info; |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 441 | u32 payload_size; |
Allan Stephens | 5af5479 | 2010-12-31 18:59:23 +0000 | [diff] [blame] | 442 | u32 n_num; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 443 | |
| 444 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 445 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 446 | |
Al Viro | 3e6c8cd | 2006-11-08 00:19:09 -0800 | [diff] [blame] | 447 | domain = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 448 | if (!tipc_addr_domain_valid(domain)) |
| 449 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 450 | " (network address)"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 451 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 452 | if (tipc_mode != TIPC_NET_MODE) |
| 453 | return tipc_cfg_reply_none(); |
| 454 | |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 455 | read_lock_bh(&tipc_net_lock); |
| 456 | |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 457 | /* Get space for all unicast links + multicast link */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 458 | |
Allan Stephens | 51f98a8 | 2010-12-31 18:59:16 +0000 | [diff] [blame] | 459 | payload_size = TLV_SPACE(sizeof(link_info)) * (tipc_net.links + 1); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 460 | if (payload_size > 32768u) { |
| 461 | read_unlock_bh(&tipc_net_lock); |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 462 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
| 463 | " (too many links)"); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 464 | } |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 465 | buf = tipc_cfg_reply_alloc(payload_size); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 466 | if (!buf) { |
| 467 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 468 | return NULL; |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 469 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 470 | |
| 471 | /* Add TLV for broadcast link */ |
| 472 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 473 | link_info.dest = htonl(tipc_own_addr & 0xfffff00); |
| 474 | link_info.up = htonl(1); |
Stephen Hemminger | 4b704d5 | 2009-03-18 19:11:29 -0700 | [diff] [blame] | 475 | strlcpy(link_info.str, tipc_bclink_name, TIPC_MAX_LINK_NAME); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 476 | tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO, &link_info, sizeof(link_info)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 477 | |
| 478 | /* Add TLVs for any other links in scope */ |
| 479 | |
Allan Stephens | 5af5479 | 2010-12-31 18:59:23 +0000 | [diff] [blame] | 480 | for (n_num = 1; n_num <= tipc_net.highest_node; n_num++) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 481 | u32 i; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 482 | |
Allan Stephens | 5af5479 | 2010-12-31 18:59:23 +0000 | [diff] [blame] | 483 | n_ptr = tipc_net.nodes[n_num]; |
| 484 | if (!n_ptr || !tipc_in_scope(domain, n_ptr->addr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 485 | continue; |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 486 | tipc_node_lock(n_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 487 | for (i = 0; i < MAX_BEARERS; i++) { |
| 488 | if (!n_ptr->links[i]) |
| 489 | continue; |
| 490 | link_info.dest = htonl(n_ptr->addr); |
| 491 | link_info.up = htonl(tipc_link_is_up(n_ptr->links[i])); |
| 492 | strcpy(link_info.str, n_ptr->links[i]->name); |
| 493 | tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 494 | &link_info, sizeof(link_info)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 495 | } |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 496 | tipc_node_unlock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 497 | } |
| 498 | |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 499 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 500 | return buf; |
| 501 | } |