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 "port.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 41 | #include "name_distr.h" |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 42 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 43 | static void node_lost_contact(struct tipc_node *n_ptr); |
| 44 | static void node_established_contact(struct tipc_node *n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 45 | |
stephen hemminger | 31e3c3f | 2010-10-13 13:20:35 +0000 | [diff] [blame] | 46 | /* sorted list of nodes within cluster */ |
| 47 | static struct tipc_node *tipc_nodes = NULL; |
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 | static DEFINE_SPINLOCK(node_create_lock); |
| 50 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 51 | u32 tipc_own_tag = 0; |
| 52 | |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 53 | /** |
| 54 | * tipc_node_create - create neighboring node |
| 55 | * |
| 56 | * Currently, this routine is called by neighbor discovery code, which holds |
| 57 | * net_lock for reading only. We must take node_create_lock to ensure a node |
| 58 | * isn't created twice if two different bearers discover the node at the same |
| 59 | * time. (It would be preferable to switch to holding net_lock in write mode, |
| 60 | * but this is a non-trivial change.) |
| 61 | */ |
| 62 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 63 | struct tipc_node *tipc_node_create(u32 addr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 64 | { |
| 65 | struct cluster *c_ptr; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 66 | struct tipc_node *n_ptr; |
| 67 | struct tipc_node **curr_node; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 68 | |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 69 | spin_lock_bh(&node_create_lock); |
| 70 | |
| 71 | for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) { |
| 72 | if (addr < n_ptr->addr) |
| 73 | break; |
| 74 | if (addr == n_ptr->addr) { |
| 75 | spin_unlock_bh(&node_create_lock); |
| 76 | return n_ptr; |
| 77 | } |
| 78 | } |
| 79 | |
Arnaldo Carvalho de Melo | 2710b57 | 2006-11-21 01:22:12 -0200 | [diff] [blame] | 80 | n_ptr = kzalloc(sizeof(*n_ptr),GFP_ATOMIC); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 81 | if (!n_ptr) { |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 82 | spin_unlock_bh(&node_create_lock); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 83 | warn("Node creation failed, no memory\n"); |
| 84 | return NULL; |
| 85 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 86 | |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 87 | c_ptr = tipc_cltr_find(addr); |
| 88 | if (!c_ptr) { |
| 89 | c_ptr = tipc_cltr_create(addr); |
| 90 | } |
| 91 | if (!c_ptr) { |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 92 | spin_unlock_bh(&node_create_lock); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 93 | kfree(n_ptr); |
| 94 | return NULL; |
| 95 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 96 | |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 97 | n_ptr->addr = addr; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 98 | spin_lock_init(&n_ptr->lock); |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 99 | INIT_LIST_HEAD(&n_ptr->nsub); |
| 100 | n_ptr->owner = c_ptr; |
| 101 | tipc_cltr_attach_node(c_ptr, n_ptr); |
| 102 | n_ptr->last_router = -1; |
| 103 | |
| 104 | /* Insert node into ordered list */ |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 105 | for (curr_node = &tipc_nodes; *curr_node; |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 106 | curr_node = &(*curr_node)->next) { |
| 107 | if (addr < (*curr_node)->addr) { |
| 108 | n_ptr->next = *curr_node; |
| 109 | break; |
| 110 | } |
| 111 | } |
| 112 | (*curr_node) = n_ptr; |
Allan Stephens | 2ecb092 | 2008-05-21 14:53:00 -0700 | [diff] [blame] | 113 | spin_unlock_bh(&node_create_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 114 | return n_ptr; |
| 115 | } |
| 116 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 117 | void tipc_node_delete(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 118 | { |
| 119 | if (!n_ptr) |
| 120 | return; |
| 121 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 122 | dbg("node %x deleted\n", n_ptr->addr); |
| 123 | kfree(n_ptr); |
| 124 | } |
| 125 | |
| 126 | |
| 127 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 128 | * tipc_node_link_up - handle addition of link |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 129 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 130 | * Link becomes active (alone or shared) or standby, depending on its priority. |
| 131 | */ |
| 132 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 133 | 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] | 134 | { |
| 135 | struct link **active = &n_ptr->active_links[0]; |
| 136 | |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 137 | n_ptr->working_links++; |
| 138 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 139 | info("Established link <%s> on network plane %c\n", |
| 140 | l_ptr->name, l_ptr->b_ptr->net_plane); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 141 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 142 | if (!active[0]) { |
| 143 | dbg(" link %x into %x/%x\n", l_ptr, &active[0], &active[1]); |
| 144 | active[0] = active[1] = l_ptr; |
| 145 | node_established_contact(n_ptr); |
| 146 | return; |
| 147 | } |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 148 | if (l_ptr->priority < active[0]->priority) { |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 149 | info("New link <%s> becomes standby\n", l_ptr->name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 150 | return; |
| 151 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 152 | tipc_link_send_duplicate(active[0], l_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 153 | if (l_ptr->priority == active[0]->priority) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 154 | active[0] = l_ptr; |
| 155 | return; |
| 156 | } |
Allan Stephens | a10bd92 | 2006-06-25 23:52:17 -0700 | [diff] [blame] | 157 | info("Old link <%s> becomes standby\n", active[0]->name); |
| 158 | if (active[1] != active[0]) |
| 159 | info("Old link <%s> becomes standby\n", active[1]->name); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 160 | active[0] = active[1] = l_ptr; |
| 161 | } |
| 162 | |
| 163 | /** |
| 164 | * node_select_active_links - select active link |
| 165 | */ |
| 166 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 167 | static void node_select_active_links(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 168 | { |
| 169 | struct link **active = &n_ptr->active_links[0]; |
| 170 | u32 i; |
| 171 | u32 highest_prio = 0; |
| 172 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 173 | active[0] = active[1] = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 174 | |
| 175 | for (i = 0; i < MAX_BEARERS; i++) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 176 | struct link *l_ptr = n_ptr->links[i]; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 177 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 178 | if (!l_ptr || !tipc_link_is_up(l_ptr) || |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 179 | (l_ptr->priority < highest_prio)) |
| 180 | continue; |
| 181 | |
| 182 | if (l_ptr->priority > highest_prio) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 183 | highest_prio = l_ptr->priority; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 184 | active[0] = active[1] = l_ptr; |
| 185 | } else { |
| 186 | active[1] = l_ptr; |
| 187 | } |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 192 | * tipc_node_link_down - handle loss of link |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 193 | */ |
| 194 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 195 | 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] | 196 | { |
| 197 | struct link **active; |
| 198 | |
Allan Stephens | 5392d64 | 2006-06-25 23:52:50 -0700 | [diff] [blame] | 199 | n_ptr->working_links--; |
| 200 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 201 | if (!tipc_link_is_active(l_ptr)) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 202 | info("Lost standby link <%s> on network plane %c\n", |
| 203 | l_ptr->name, l_ptr->b_ptr->net_plane); |
| 204 | return; |
| 205 | } |
| 206 | info("Lost link <%s> on network plane %c\n", |
| 207 | l_ptr->name, l_ptr->b_ptr->net_plane); |
| 208 | |
| 209 | active = &n_ptr->active_links[0]; |
| 210 | if (active[0] == l_ptr) |
| 211 | active[0] = active[1]; |
| 212 | if (active[1] == l_ptr) |
| 213 | active[1] = active[0]; |
| 214 | if (active[0] == l_ptr) |
| 215 | node_select_active_links(n_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 216 | if (tipc_node_is_up(n_ptr)) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 217 | tipc_link_changeover(l_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 218 | else |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 219 | node_lost_contact(n_ptr); |
| 220 | } |
| 221 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 222 | int tipc_node_has_active_links(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 223 | { |
Allan Stephens | 76ae0d7 | 2010-08-17 11:00:12 +0000 | [diff] [blame] | 224 | return n_ptr->active_links[0] != NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 225 | } |
| 226 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 227 | int tipc_node_has_redundant_links(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 228 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 229 | return n_ptr->working_links > 1; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 230 | } |
| 231 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 232 | static int tipc_node_has_active_routes(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 233 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 234 | return n_ptr && (n_ptr->last_router >= 0); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 235 | } |
| 236 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 237 | int tipc_node_is_up(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 238 | { |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 239 | return tipc_node_has_active_links(n_ptr) || tipc_node_has_active_routes(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 240 | } |
| 241 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 242 | struct tipc_node *tipc_node_attach_link(struct link *l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 243 | { |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 244 | struct tipc_node *n_ptr = tipc_node_find(l_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 245 | |
| 246 | if (!n_ptr) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 247 | n_ptr = tipc_node_create(l_ptr->addr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 248 | if (n_ptr) { |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 249 | u32 bearer_id = l_ptr->b_ptr->identity; |
| 250 | char addr_string[16]; |
| 251 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 252 | if (n_ptr->link_cnt >= 2) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 253 | err("Attempt to create third link to %s\n", |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 254 | tipc_addr_string_fill(addr_string, n_ptr->addr)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 255 | return NULL; |
| 256 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 257 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 258 | if (!n_ptr->links[bearer_id]) { |
| 259 | n_ptr->links[bearer_id] = l_ptr; |
Allan Stephens | 51f98a8 | 2010-12-31 18:59:16 +0000 | [diff] [blame] | 260 | tipc_net.links++; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 261 | n_ptr->link_cnt++; |
| 262 | return n_ptr; |
| 263 | } |
Frans Pop | a570f09 | 2010-03-24 07:57:29 +0000 | [diff] [blame] | 264 | err("Attempt to establish second link on <%s> to %s\n", |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 265 | l_ptr->b_ptr->publ.name, |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 266 | tipc_addr_string_fill(addr_string, l_ptr->addr)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 267 | } |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 268 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 269 | } |
| 270 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 271 | 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] | 272 | { |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 273 | n_ptr->links[l_ptr->b_ptr->identity] = NULL; |
Allan Stephens | 51f98a8 | 2010-12-31 18:59:16 +0000 | [diff] [blame] | 274 | tipc_net.links--; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 275 | n_ptr->link_cnt--; |
| 276 | } |
| 277 | |
| 278 | /* |
| 279 | * Routing table management - five cases to handle: |
| 280 | * |
| 281 | * 1: A link towards a zone/cluster external node comes up. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 282 | * => Send a multicast message updating routing tables of all |
| 283 | * system nodes within own cluster that the new destination |
| 284 | * can be reached via this node. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 285 | * (node.establishedContact()=>cluster.multicastNewRoute()) |
| 286 | * |
| 287 | * 2: A link towards a slave node comes up. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 288 | * => Send a multicast message updating routing tables of all |
| 289 | * system nodes within own cluster that the new destination |
| 290 | * can be reached via this node. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 291 | * (node.establishedContact()=>cluster.multicastNewRoute()) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 292 | * => Send a message to the slave node about existence |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 293 | * of all system nodes within cluster: |
| 294 | * (node.establishedContact()=>cluster.sendLocalRoutes()) |
| 295 | * |
| 296 | * 3: A new cluster local system node becomes available. |
| 297 | * => Send message(s) to this particular node containing |
| 298 | * information about all cluster external and slave |
| 299 | * nodes which can be reached via this node. |
| 300 | * (node.establishedContact()==>network.sendExternalRoutes()) |
| 301 | * (node.establishedContact()==>network.sendSlaveRoutes()) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 302 | * => Send messages to all directly connected slave nodes |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 303 | * containing information about the existence of the new node |
| 304 | * (node.establishedContact()=>cluster.multicastNewRoute()) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 305 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 306 | * 4: The link towards a zone/cluster external node or slave |
| 307 | * node goes down. |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 308 | * => Send a multcast message updating routing tables of all |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 309 | * nodes within cluster that the new destination can not any |
| 310 | * longer be reached via this node. |
| 311 | * (node.lostAllLinks()=>cluster.bcastLostRoute()) |
| 312 | * |
| 313 | * 5: A cluster local system node becomes unavailable. |
| 314 | * => Remove all references to this node from the local |
| 315 | * routing tables. Note: This is a completely node |
| 316 | * local operation. |
| 317 | * (node.lostAllLinks()=>network.removeAsRouter()) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 318 | * => Send messages to all directly connected slave nodes |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 319 | * containing information about loss of the node |
| 320 | * (node.establishedContact()=>cluster.multicastLostRoute()) |
| 321 | * |
| 322 | */ |
| 323 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 324 | static void node_established_contact(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 325 | { |
| 326 | struct cluster *c_ptr; |
| 327 | |
| 328 | dbg("node_established_contact:-> %x\n", n_ptr->addr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 329 | if (!tipc_node_has_active_routes(n_ptr) && in_own_cluster(n_ptr->addr)) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 330 | tipc_k_signal((Handler)tipc_named_node_up, n_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 331 | } |
| 332 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 333 | /* Syncronize broadcast acks */ |
| 334 | n_ptr->bclink.acked = tipc_bclink_get_last_sent(); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 335 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 336 | if (!in_own_cluster(n_ptr->addr)) { |
| 337 | /* Usage case 1 (see above) */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 338 | c_ptr = tipc_cltr_find(tipc_own_addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 339 | if (!c_ptr) |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 340 | c_ptr = tipc_cltr_create(tipc_own_addr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 341 | if (c_ptr) |
| 342 | tipc_cltr_bcast_new_route(c_ptr, n_ptr->addr, 1, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 343 | tipc_max_nodes); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 344 | return; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 345 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 346 | |
| 347 | c_ptr = n_ptr->owner; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 348 | if (n_ptr->bclink.supported) { |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 349 | tipc_nmap_add(&tipc_cltr_bcast_nodes, n_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 350 | if (n_ptr->addr < tipc_own_addr) |
| 351 | tipc_own_tag++; |
| 352 | } |
| 353 | |
| 354 | /* Case 3 (see above) */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 355 | tipc_net_send_external_routes(n_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 356 | } |
| 357 | |
Allan Stephens | 5a68d5e | 2010-08-17 11:00:16 +0000 | [diff] [blame] | 358 | static void node_cleanup_finished(unsigned long node_addr) |
| 359 | { |
| 360 | struct tipc_node *n_ptr; |
| 361 | |
| 362 | read_lock_bh(&tipc_net_lock); |
| 363 | n_ptr = tipc_node_find(node_addr); |
| 364 | if (n_ptr) { |
| 365 | tipc_node_lock(n_ptr); |
| 366 | n_ptr->cleanup_required = 0; |
| 367 | tipc_node_unlock(n_ptr); |
| 368 | } |
| 369 | read_unlock_bh(&tipc_net_lock); |
| 370 | } |
| 371 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 372 | static void node_lost_contact(struct tipc_node *n_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 373 | { |
| 374 | struct cluster *c_ptr; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 375 | struct tipc_node_subscr *ns, *tns; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 376 | char addr_string[16]; |
| 377 | u32 i; |
| 378 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 379 | /* Clean up broadcast reception remains */ |
| 380 | n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = 0; |
| 381 | while (n_ptr->bclink.deferred_head) { |
| 382 | struct sk_buff* buf = n_ptr->bclink.deferred_head; |
| 383 | n_ptr->bclink.deferred_head = buf->next; |
| 384 | buf_discard(buf); |
| 385 | } |
| 386 | if (n_ptr->bclink.defragm) { |
| 387 | buf_discard(n_ptr->bclink.defragm); |
| 388 | n_ptr->bclink.defragm = NULL; |
| 389 | } |
| 390 | if (in_own_cluster(n_ptr->addr) && n_ptr->bclink.supported) { |
| 391 | tipc_bclink_acknowledge(n_ptr, mod(n_ptr->bclink.acked + 10000)); |
| 392 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 393 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 394 | /* Update routing tables */ |
Allan Stephens | 08c80e9 | 2010-12-31 18:59:17 +0000 | [diff] [blame^] | 395 | if (!in_own_cluster(n_ptr->addr)) { |
| 396 | /* Case 4 (see above) */ |
| 397 | c_ptr = tipc_cltr_find(tipc_own_addr); |
| 398 | tipc_cltr_bcast_lost_route(c_ptr, n_ptr->addr, 1, |
| 399 | tipc_max_nodes); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 400 | } else { |
Allan Stephens | 08c80e9 | 2010-12-31 18:59:17 +0000 | [diff] [blame^] | 401 | /* Case 5 (see above) */ |
| 402 | c_ptr = tipc_cltr_find(n_ptr->addr); |
| 403 | if (n_ptr->bclink.supported) { |
| 404 | tipc_nmap_remove(&tipc_cltr_bcast_nodes, n_ptr->addr); |
| 405 | if (n_ptr->addr < tipc_own_addr) |
| 406 | tipc_own_tag--; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 407 | } |
Allan Stephens | 08c80e9 | 2010-12-31 18:59:17 +0000 | [diff] [blame^] | 408 | tipc_net_remove_as_router(n_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 409 | } |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 410 | if (tipc_node_has_active_routes(n_ptr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 411 | return; |
| 412 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 413 | info("Lost contact with %s\n", |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 414 | tipc_addr_string_fill(addr_string, n_ptr->addr)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 415 | |
| 416 | /* Abort link changeover */ |
| 417 | for (i = 0; i < MAX_BEARERS; i++) { |
| 418 | struct link *l_ptr = n_ptr->links[i]; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 419 | if (!l_ptr) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 420 | continue; |
| 421 | l_ptr->reset_checkpoint = l_ptr->next_in_no; |
| 422 | l_ptr->exp_msg_count = 0; |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 423 | tipc_link_reset_fragments(l_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 424 | } |
| 425 | |
| 426 | /* Notify subscribers */ |
| 427 | list_for_each_entry_safe(ns, tns, &n_ptr->nsub, nodesub_list) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 428 | ns->node = NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 429 | list_del_init(&ns->nodesub_list); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 430 | tipc_k_signal((Handler)ns->handle_node_down, |
| 431 | (unsigned long)ns->usr_handle); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 432 | } |
Allan Stephens | 5a68d5e | 2010-08-17 11:00:16 +0000 | [diff] [blame] | 433 | |
| 434 | /* Prevent re-contact with node until all cleanup is done */ |
| 435 | |
| 436 | n_ptr->cleanup_required = 1; |
| 437 | tipc_k_signal((Handler)node_cleanup_finished, n_ptr->addr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 441 | * tipc_node_select_next_hop - find the next-hop node for a message |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 442 | * |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 443 | * Called by when cluster local lookup has failed. |
| 444 | */ |
| 445 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 446 | struct tipc_node *tipc_node_select_next_hop(u32 addr, u32 selector) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 447 | { |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 448 | struct tipc_node *n_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 449 | u32 router_addr; |
| 450 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 451 | if (!tipc_addr_domain_valid(addr)) |
| 452 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 453 | |
| 454 | /* Look for direct link to destination processsor */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 455 | n_ptr = tipc_node_find(addr); |
| 456 | if (n_ptr && tipc_node_has_active_links(n_ptr)) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 457 | return n_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 458 | |
| 459 | /* Cluster local system nodes *must* have direct links */ |
Allan Stephens | 08c80e9 | 2010-12-31 18:59:17 +0000 | [diff] [blame^] | 460 | if (in_own_cluster(addr)) |
Sam Ravnborg | 1fc54d8 | 2006-03-20 22:36:47 -0800 | [diff] [blame] | 461 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 462 | |
| 463 | /* Look for cluster local router with direct link to node */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 464 | router_addr = tipc_node_select_router(n_ptr, selector); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 465 | if (router_addr) |
| 466 | return tipc_node_select(router_addr, selector); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 467 | |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 468 | /* Inter zone/cluster -- find any direct link to remote cluster */ |
| 469 | addr = tipc_addr(tipc_zone(addr), tipc_cluster(addr), 0); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 470 | n_ptr = tipc_net_select_remote_node(addr, selector); |
| 471 | if (n_ptr && tipc_node_has_active_links(n_ptr)) |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 472 | return n_ptr; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 473 | |
| 474 | /* Last resort -- look for any router to anywhere in remote zone */ |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 475 | router_addr = tipc_net_select_router(addr, selector); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 476 | if (router_addr) |
| 477 | return tipc_node_select(router_addr, selector); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 478 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 479 | return NULL; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 480 | } |
| 481 | |
| 482 | /** |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 483 | * tipc_node_select_router - select router to reach specified node |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 484 | * |
| 485 | * Uses a deterministic and fair algorithm for selecting router node. |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 486 | */ |
| 487 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 488 | u32 tipc_node_select_router(struct tipc_node *n_ptr, u32 ref) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 489 | { |
| 490 | u32 ulim; |
| 491 | u32 mask; |
| 492 | u32 start; |
| 493 | u32 r; |
| 494 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 495 | if (!n_ptr) |
| 496 | return 0; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 497 | |
| 498 | if (n_ptr->last_router < 0) |
| 499 | return 0; |
| 500 | ulim = ((n_ptr->last_router + 1) * 32) - 1; |
| 501 | |
| 502 | /* Start entry must be random */ |
| 503 | mask = tipc_max_nodes; |
| 504 | while (mask > ulim) |
| 505 | mask >>= 1; |
| 506 | start = ref & mask; |
| 507 | r = start; |
| 508 | |
| 509 | /* Lookup upwards with wrap-around */ |
| 510 | do { |
| 511 | if (((n_ptr->routers[r / 32]) >> (r % 32)) & 1) |
| 512 | break; |
| 513 | } while (++r <= ulim); |
| 514 | if (r > ulim) { |
| 515 | r = 1; |
| 516 | do { |
| 517 | if (((n_ptr->routers[r / 32]) >> (r % 32)) & 1) |
| 518 | break; |
| 519 | } while (++r < start); |
| 520 | assert(r != start); |
| 521 | } |
| 522 | assert(r && (r <= ulim)); |
| 523 | return tipc_addr(own_zone(), own_cluster(), r); |
| 524 | } |
| 525 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 526 | void tipc_node_add_router(struct tipc_node *n_ptr, u32 router) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 527 | { |
| 528 | u32 r_num = tipc_node(router); |
| 529 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 530 | n_ptr->routers[r_num / 32] = |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 531 | ((1 << (r_num % 32)) | n_ptr->routers[r_num / 32]); |
| 532 | n_ptr->last_router = tipc_max_nodes / 32; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 533 | while ((--n_ptr->last_router >= 0) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 534 | !n_ptr->routers[n_ptr->last_router]); |
| 535 | } |
| 536 | |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 537 | void tipc_node_remove_router(struct tipc_node *n_ptr, u32 router) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 538 | { |
| 539 | u32 r_num = tipc_node(router); |
| 540 | |
| 541 | if (n_ptr->last_router < 0) |
| 542 | return; /* No routes */ |
| 543 | |
| 544 | n_ptr->routers[r_num / 32] = |
| 545 | ((~(1 << (r_num % 32))) & (n_ptr->routers[r_num / 32])); |
| 546 | n_ptr->last_router = tipc_max_nodes / 32; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 547 | while ((--n_ptr->last_router >= 0) && |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 548 | !n_ptr->routers[n_ptr->last_router]); |
| 549 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 550 | if (!tipc_node_is_up(n_ptr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 551 | node_lost_contact(n_ptr); |
| 552 | } |
| 553 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 554 | 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] | 555 | { |
| 556 | u32 domain; |
| 557 | struct sk_buff *buf; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 558 | struct tipc_node *n_ptr; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 559 | struct tipc_node_info node_info; |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 560 | u32 payload_size; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 561 | |
| 562 | 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] | 563 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 564 | |
Al Viro | 3e6c8cd | 2006-11-08 00:19:09 -0800 | [diff] [blame] | 565 | domain = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 566 | if (!tipc_addr_domain_valid(domain)) |
| 567 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 568 | " (network address)"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 569 | |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 570 | read_lock_bh(&tipc_net_lock); |
| 571 | if (!tipc_nodes) { |
| 572 | read_unlock_bh(&tipc_net_lock); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 573 | return tipc_cfg_reply_none(); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 574 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 575 | |
Allan Stephens | 08c80e9 | 2010-12-31 18:59:17 +0000 | [diff] [blame^] | 576 | /* For now, get space for all other nodes */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 577 | |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 578 | payload_size = TLV_SPACE(sizeof(node_info)) * (tipc_max_nodes - 1); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 579 | if (payload_size > 32768u) { |
| 580 | read_unlock_bh(&tipc_net_lock); |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 581 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
| 582 | " (too many nodes)"); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 583 | } |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 584 | buf = tipc_cfg_reply_alloc(payload_size); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 585 | if (!buf) { |
| 586 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 587 | return NULL; |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 588 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 589 | |
| 590 | /* Add TLVs for all nodes in scope */ |
| 591 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 592 | for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) { |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 593 | if (!tipc_in_scope(domain, n_ptr->addr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 594 | continue; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 595 | node_info.addr = htonl(n_ptr->addr); |
| 596 | node_info.up = htonl(tipc_node_is_up(n_ptr)); |
| 597 | tipc_cfg_append_tlv(buf, TIPC_TLV_NODE_INFO, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 598 | &node_info, sizeof(node_info)); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 599 | } |
| 600 | |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 601 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 602 | return buf; |
| 603 | } |
| 604 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 605 | 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] | 606 | { |
| 607 | u32 domain; |
| 608 | struct sk_buff *buf; |
David S. Miller | 6c00055 | 2008-09-02 23:38:32 -0700 | [diff] [blame] | 609 | struct tipc_node *n_ptr; |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 610 | struct tipc_link_info link_info; |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 611 | u32 payload_size; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 612 | |
| 613 | 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] | 614 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 615 | |
Al Viro | 3e6c8cd | 2006-11-08 00:19:09 -0800 | [diff] [blame] | 616 | domain = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 617 | if (!tipc_addr_domain_valid(domain)) |
| 618 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
| 619 | " (network address)"); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 620 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 621 | if (tipc_mode != TIPC_NET_MODE) |
| 622 | return tipc_cfg_reply_none(); |
| 623 | |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 624 | read_lock_bh(&tipc_net_lock); |
| 625 | |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 626 | /* Get space for all unicast links + multicast link */ |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 627 | |
Allan Stephens | 51f98a8 | 2010-12-31 18:59:16 +0000 | [diff] [blame] | 628 | payload_size = TLV_SPACE(sizeof(link_info)) * (tipc_net.links + 1); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 629 | if (payload_size > 32768u) { |
| 630 | read_unlock_bh(&tipc_net_lock); |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 631 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
| 632 | " (too many links)"); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 633 | } |
Allan Stephens | ea13847 | 2006-06-29 12:33:20 -0700 | [diff] [blame] | 634 | buf = tipc_cfg_reply_alloc(payload_size); |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 635 | if (!buf) { |
| 636 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 637 | return NULL; |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 638 | } |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 639 | |
| 640 | /* Add TLV for broadcast link */ |
| 641 | |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 642 | link_info.dest = htonl(tipc_own_addr & 0xfffff00); |
| 643 | link_info.up = htonl(1); |
Stephen Hemminger | 4b704d5 | 2009-03-18 19:11:29 -0700 | [diff] [blame] | 644 | strlcpy(link_info.str, tipc_bclink_name, TIPC_MAX_LINK_NAME); |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 645 | 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] | 646 | |
| 647 | /* Add TLVs for any other links in scope */ |
| 648 | |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 649 | for (n_ptr = tipc_nodes; n_ptr; n_ptr = n_ptr->next) { |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 650 | u32 i; |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 651 | |
Allan Stephens | c68ca7b | 2010-05-11 14:30:12 +0000 | [diff] [blame] | 652 | if (!tipc_in_scope(domain, n_ptr->addr)) |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 653 | continue; |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 654 | tipc_node_lock(n_ptr); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 655 | for (i = 0; i < MAX_BEARERS; i++) { |
| 656 | if (!n_ptr->links[i]) |
| 657 | continue; |
| 658 | link_info.dest = htonl(n_ptr->addr); |
| 659 | link_info.up = htonl(tipc_link_is_up(n_ptr->links[i])); |
| 660 | strcpy(link_info.str, n_ptr->links[i]->name); |
| 661 | tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO, |
Per Liden | 4323add | 2006-01-18 00:38:21 +0100 | [diff] [blame] | 662 | &link_info, sizeof(link_info)); |
YOSHIFUJI Hideaki | c430728 | 2007-02-09 23:25:21 +0900 | [diff] [blame] | 663 | } |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 664 | tipc_node_unlock(n_ptr); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 665 | } |
| 666 | |
Allan Stephens | 1aad72d | 2008-07-14 22:44:58 -0700 | [diff] [blame] | 667 | read_unlock_bh(&tipc_net_lock); |
Per Liden | b97bf3f | 2006-01-02 19:04:38 +0100 | [diff] [blame] | 668 | return buf; |
| 669 | } |