blob: 1d3a4999a70ff96a751f3908d0d8e274af63a962 [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/node.c: TIPC node management routines
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Jon Maloyc64f7a62012-11-16 13:51:31 +08004 * Copyright (c) 2000-2006, 2012 Ericsson AB
Ying Xue46651c52014-03-27 12:54:36 +08005 * Copyright (c) 2005-2006, 2010-2014, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 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 Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * 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 Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#include "core.h"
38#include "config.h"
39#include "node.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010040#include "name_distr.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010041
Allan Stephensa635b462011-11-04 11:54:43 -040042#define NODE_HTABLE_SIZE 512
43
David S. Miller6c000552008-09-02 23:38:32 -070044static void node_lost_contact(struct tipc_node *n_ptr);
45static void node_established_contact(struct tipc_node *n_ptr);
Per Lidenb97bf3f2006-01-02 19:04:38 +010046
Allan Stephens672d99e2011-02-25 18:42:52 -050047static struct hlist_head node_htable[NODE_HTABLE_SIZE];
48LIST_HEAD(tipc_node_list);
49static u32 tipc_num_nodes;
Ying Xuedde20262014-03-27 12:54:39 +080050static u32 tipc_num_links;
Ying Xue46651c52014-03-27 12:54:36 +080051static DEFINE_SPINLOCK(node_list_lock);
Allan Stephens34e46252011-02-25 19:11:25 -050052
Allan Stephens1ec2bb02011-10-27 15:03:24 -040053/*
Allan Stephensa635b462011-11-04 11:54:43 -040054 * A trivial power-of-two bitmask technique is used for speed, since this
55 * operation is done for every incoming TIPC packet. The number of hash table
56 * entries has been chosen so that no hash chain exceeds 8 nodes and will
57 * usually be much smaller (typically only a single node).
58 */
Paul Gortmaker872f24d2012-04-23 04:49:13 +000059static unsigned int tipc_hashfn(u32 addr)
Allan Stephensa635b462011-11-04 11:54:43 -040060{
61 return addr & (NODE_HTABLE_SIZE - 1);
62}
63
64/*
Allan Stephens672d99e2011-02-25 18:42:52 -050065 * tipc_node_find - locate specified node object, if it exists
66 */
Allan Stephens672d99e2011-02-25 18:42:52 -050067struct tipc_node *tipc_node_find(u32 addr)
68{
69 struct tipc_node *node;
Allan Stephens672d99e2011-02-25 18:42:52 -050070
Allan Stephens336ebf52012-04-17 18:02:01 -040071 if (unlikely(!in_own_cluster_exact(addr)))
Allan Stephens672d99e2011-02-25 18:42:52 -050072 return NULL;
73
Ying Xue6c7a7622014-03-27 12:54:37 +080074 rcu_read_lock();
75 hlist_for_each_entry_rcu(node, &node_htable[tipc_hashfn(addr)], hash) {
Ying Xue46651c52014-03-27 12:54:36 +080076 if (node->addr == addr) {
Ying Xue6c7a7622014-03-27 12:54:37 +080077 rcu_read_unlock();
Allan Stephens672d99e2011-02-25 18:42:52 -050078 return node;
Ying Xue46651c52014-03-27 12:54:36 +080079 }
Allan Stephens672d99e2011-02-25 18:42:52 -050080 }
Ying Xue6c7a7622014-03-27 12:54:37 +080081 rcu_read_unlock();
Allan Stephens672d99e2011-02-25 18:42:52 -050082 return NULL;
83}
84
David S. Miller6c000552008-09-02 23:38:32 -070085struct tipc_node *tipc_node_create(u32 addr)
Per Lidenb97bf3f2006-01-02 19:04:38 +010086{
Allan Stephens672d99e2011-02-25 18:42:52 -050087 struct tipc_node *n_ptr, *temp_node;
Per Lidenb97bf3f2006-01-02 19:04:38 +010088
Ying Xue46651c52014-03-27 12:54:36 +080089 spin_lock_bh(&node_list_lock);
Allan Stephens2ecb0922008-05-21 14:53:00 -070090
Allan Stephens5af54792010-12-31 18:59:23 +000091 n_ptr = kzalloc(sizeof(*n_ptr), GFP_ATOMIC);
Allan Stephensa10bd922006-06-25 23:52:17 -070092 if (!n_ptr) {
Ying Xue46651c52014-03-27 12:54:36 +080093 spin_unlock_bh(&node_list_lock);
Erik Hugne2cf8aa12012-06-29 00:16:37 -040094 pr_warn("Node creation failed, no memory\n");
Allan Stephensa10bd922006-06-25 23:52:17 -070095 return NULL;
96 }
Per Lidenb97bf3f2006-01-02 19:04:38 +010097
Allan Stephensa10bd922006-06-25 23:52:17 -070098 n_ptr->addr = addr;
Allan Stephens51a8e4d2010-12-31 18:59:18 +000099 spin_lock_init(&n_ptr->lock);
Allan Stephens672d99e2011-02-25 18:42:52 -0500100 INIT_HLIST_NODE(&n_ptr->hash);
101 INIT_LIST_HEAD(&n_ptr->list);
Allan Stephensa10bd922006-06-25 23:52:17 -0700102 INIT_LIST_HEAD(&n_ptr->nsub);
Allan Stephens8f92df62010-12-31 18:59:19 +0000103
Ying Xue6c7a7622014-03-27 12:54:37 +0800104 hlist_add_head_rcu(&n_ptr->hash, &node_htable[tipc_hashfn(addr)]);
Allan Stephens672d99e2011-02-25 18:42:52 -0500105
Ying Xue6c7a7622014-03-27 12:54:37 +0800106 list_for_each_entry_rcu(temp_node, &tipc_node_list, list) {
Allan Stephens672d99e2011-02-25 18:42:52 -0500107 if (n_ptr->addr < temp_node->addr)
108 break;
109 }
Ying Xue6c7a7622014-03-27 12:54:37 +0800110 list_add_tail_rcu(&n_ptr->list, &temp_node->list);
Allan Stephensb4b56102011-05-27 11:00:51 -0400111 n_ptr->block_setup = WAIT_PEER_DOWN;
Allan Stephensfc0eea62011-10-28 16:26:41 -0400112 n_ptr->signature = INVALID_NODE_SIG;
Allan Stephens672d99e2011-02-25 18:42:52 -0500113
114 tipc_num_nodes++;
Allan Stephensa10bd922006-06-25 23:52:17 -0700115
Ying Xue46651c52014-03-27 12:54:36 +0800116 spin_unlock_bh(&node_list_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100117 return n_ptr;
118}
119
Ying Xue46651c52014-03-27 12:54:36 +0800120static void tipc_node_delete(struct tipc_node *n_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100121{
Ying Xue6c7a7622014-03-27 12:54:37 +0800122 list_del_rcu(&n_ptr->list);
123 hlist_del_rcu(&n_ptr->hash);
124 kfree_rcu(n_ptr, rcu);
Allan Stephens8f92df62010-12-31 18:59:19 +0000125
Allan Stephens672d99e2011-02-25 18:42:52 -0500126 tipc_num_nodes--;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100127}
128
Ying Xue46651c52014-03-27 12:54:36 +0800129void tipc_node_stop(void)
130{
131 struct tipc_node *node, *t_node;
132
133 spin_lock_bh(&node_list_lock);
134 list_for_each_entry_safe(node, t_node, &tipc_node_list, list)
135 tipc_node_delete(node);
136 spin_unlock_bh(&node_list_lock);
137}
138
Per Lidenb97bf3f2006-01-02 19:04:38 +0100139/**
Per Liden4323add2006-01-18 00:38:21 +0100140 * tipc_node_link_up - handle addition of link
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900141 *
Per Lidenb97bf3f2006-01-02 19:04:38 +0100142 * Link becomes active (alone or shared) or standby, depending on its priority.
143 */
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500144void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100145{
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500146 struct tipc_link **active = &n_ptr->active_links[0];
Per Lidenb97bf3f2006-01-02 19:04:38 +0100147
Allan Stephens5392d642006-06-25 23:52:50 -0700148 n_ptr->working_links++;
149
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400150 pr_info("Established link <%s> on network plane %c\n",
151 l_ptr->name, l_ptr->b_ptr->net_plane);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900152
Per Lidenb97bf3f2006-01-02 19:04:38 +0100153 if (!active[0]) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100154 active[0] = active[1] = l_ptr;
155 node_established_contact(n_ptr);
156 return;
157 }
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900158 if (l_ptr->priority < active[0]->priority) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400159 pr_info("New link <%s> becomes standby\n", l_ptr->name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100160 return;
161 }
Ying Xue247f0f32014-02-18 16:06:46 +0800162 tipc_link_dup_queue_xmit(active[0], l_ptr);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900163 if (l_ptr->priority == active[0]->priority) {
Per Lidenb97bf3f2006-01-02 19:04:38 +0100164 active[0] = l_ptr;
165 return;
166 }
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400167 pr_info("Old link <%s> becomes standby\n", active[0]->name);
Allan Stephensa10bd922006-06-25 23:52:17 -0700168 if (active[1] != active[0])
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400169 pr_info("Old link <%s> becomes standby\n", active[1]->name);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100170 active[0] = active[1] = l_ptr;
171}
172
173/**
174 * node_select_active_links - select active link
175 */
David S. Miller6c000552008-09-02 23:38:32 -0700176static void node_select_active_links(struct tipc_node *n_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100177{
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500178 struct tipc_link **active = &n_ptr->active_links[0];
Per Lidenb97bf3f2006-01-02 19:04:38 +0100179 u32 i;
180 u32 highest_prio = 0;
181
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900182 active[0] = active[1] = NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100183
184 for (i = 0; i < MAX_BEARERS; i++) {
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500185 struct tipc_link *l_ptr = n_ptr->links[i];
Per Lidenb97bf3f2006-01-02 19:04:38 +0100186
Per Liden4323add2006-01-18 00:38:21 +0100187 if (!l_ptr || !tipc_link_is_up(l_ptr) ||
Per Lidenb97bf3f2006-01-02 19:04:38 +0100188 (l_ptr->priority < highest_prio))
189 continue;
190
191 if (l_ptr->priority > highest_prio) {
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900192 highest_prio = l_ptr->priority;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100193 active[0] = active[1] = l_ptr;
194 } else {
195 active[1] = l_ptr;
196 }
197 }
198}
199
200/**
Per Liden4323add2006-01-18 00:38:21 +0100201 * tipc_node_link_down - handle loss of link
Per Lidenb97bf3f2006-01-02 19:04:38 +0100202 */
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500203void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100204{
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500205 struct tipc_link **active;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100206
Allan Stephens5392d642006-06-25 23:52:50 -0700207 n_ptr->working_links--;
208
Per Liden4323add2006-01-18 00:38:21 +0100209 if (!tipc_link_is_active(l_ptr)) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400210 pr_info("Lost standby link <%s> on network plane %c\n",
211 l_ptr->name, l_ptr->b_ptr->net_plane);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100212 return;
213 }
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400214 pr_info("Lost link <%s> on network plane %c\n",
Per Lidenb97bf3f2006-01-02 19:04:38 +0100215 l_ptr->name, l_ptr->b_ptr->net_plane);
216
217 active = &n_ptr->active_links[0];
218 if (active[0] == l_ptr)
219 active[0] = active[1];
220 if (active[1] == l_ptr)
221 active[1] = active[0];
222 if (active[0] == l_ptr)
223 node_select_active_links(n_ptr);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900224 if (tipc_node_is_up(n_ptr))
Jon Paul Maloy170b3922014-01-07 17:02:41 -0500225 tipc_link_failover_send_queue(l_ptr);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900226 else
Per Lidenb97bf3f2006-01-02 19:04:38 +0100227 node_lost_contact(n_ptr);
228}
229
Paul Gortmaker8f19afb2011-02-28 11:36:21 -0400230int tipc_node_active_links(struct tipc_node *n_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100231{
Allan Stephens76ae0d72010-08-17 11:00:12 +0000232 return n_ptr->active_links[0] != NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100233}
234
David S. Miller6c000552008-09-02 23:38:32 -0700235int tipc_node_is_up(struct tipc_node *n_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100236{
Paul Gortmaker8f19afb2011-02-28 11:36:21 -0400237 return tipc_node_active_links(n_ptr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100238}
239
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500240void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100241{
Allan Stephens37b9c082011-02-28 11:32:27 -0500242 n_ptr->links[l_ptr->b_ptr->identity] = l_ptr;
Ying Xuedde20262014-03-27 12:54:39 +0800243 spin_lock_bh(&node_list_lock);
244 tipc_num_links++;
245 spin_unlock_bh(&node_list_lock);
Allan Stephens37b9c082011-02-28 11:32:27 -0500246 n_ptr->link_cnt++;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100247}
248
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500249void tipc_node_detach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100250{
Jon Paul Maloy7d339392014-02-13 17:29:16 -0500251 int i;
252
253 for (i = 0; i < MAX_BEARERS; i++) {
Jon Paul Maloy074bb432014-02-14 16:40:43 -0500254 if (l_ptr != n_ptr->links[i])
255 continue;
256 n_ptr->links[i] = NULL;
Ying Xuedde20262014-03-27 12:54:39 +0800257 spin_lock_bh(&node_list_lock);
258 tipc_num_links--;
259 spin_unlock_bh(&node_list_lock);
Jon Paul Maloy074bb432014-02-14 16:40:43 -0500260 n_ptr->link_cnt--;
Jon Paul Maloy7d339392014-02-13 17:29:16 -0500261 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100262}
263
David S. Miller6c000552008-09-02 23:38:32 -0700264static void node_established_contact(struct tipc_node *n_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100265{
Allan Stephens51a8e4d2010-12-31 18:59:18 +0000266 tipc_k_signal((Handler)tipc_named_node_up, n_ptr->addr);
Jon Maloyc64f7a62012-11-16 13:51:31 +0800267 n_ptr->bclink.oos_state = 0;
Ying Xue818f4da2012-11-16 13:51:29 +0800268 n_ptr->bclink.acked = tipc_bclink_get_last_sent();
269 tipc_bclink_add_node(n_ptr->addr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100270}
271
Allan Stephensb4b56102011-05-27 11:00:51 -0400272static void node_name_purge_complete(unsigned long node_addr)
Allan Stephens5a68d5e2010-08-17 11:00:16 +0000273{
274 struct tipc_node *n_ptr;
275
276 read_lock_bh(&tipc_net_lock);
277 n_ptr = tipc_node_find(node_addr);
278 if (n_ptr) {
279 tipc_node_lock(n_ptr);
Allan Stephensb4b56102011-05-27 11:00:51 -0400280 n_ptr->block_setup &= ~WAIT_NAMES_GONE;
Allan Stephens5a68d5e2010-08-17 11:00:16 +0000281 tipc_node_unlock(n_ptr);
282 }
283 read_unlock_bh(&tipc_net_lock);
284}
285
David S. Miller6c000552008-09-02 23:38:32 -0700286static void node_lost_contact(struct tipc_node *n_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100287{
Per Lidenb97bf3f2006-01-02 19:04:38 +0100288 char addr_string[16];
289 u32 i;
290
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400291 pr_info("Lost contact with %s\n",
292 tipc_addr_string_fill(addr_string, n_ptr->addr));
Allan Stephensc5bd4d82011-04-07 11:58:08 -0400293
294 /* Flush broadcast link info associated with lost node */
Ying Xue389dd9b2012-11-16 13:51:30 +0800295 if (n_ptr->bclink.recv_permitted) {
Ying Xued77b3832013-12-10 20:45:38 -0800296 kfree_skb_list(n_ptr->bclink.deferred_head);
Allan Stephens7a54d4a2011-10-27 14:17:53 -0400297 n_ptr->bclink.deferred_size = 0;
Allan Stephensc5bd4d82011-04-07 11:58:08 -0400298
Erik Hugne40ba3cd2013-11-06 09:28:06 +0100299 if (n_ptr->bclink.reasm_head) {
300 kfree_skb(n_ptr->bclink.reasm_head);
301 n_ptr->bclink.reasm_head = NULL;
302 n_ptr->bclink.reasm_tail = NULL;
Allan Stephensc5bd4d82011-04-07 11:58:08 -0400303 }
304
Allan Stephenscd3decd2011-10-24 11:18:12 -0400305 tipc_bclink_remove_node(n_ptr->addr);
Allan Stephens365595912011-10-24 15:26:24 -0400306 tipc_bclink_acknowledge(n_ptr, INVALID_LINK_SEQ);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100307
Ying Xue389dd9b2012-11-16 13:51:30 +0800308 n_ptr->bclink.recv_permitted = false;
Allan Stephensc5bd4d82011-04-07 11:58:08 -0400309 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100310
311 /* Abort link changeover */
312 for (i = 0; i < MAX_BEARERS; i++) {
Paul Gortmakera18c4bc2011-12-29 20:58:42 -0500313 struct tipc_link *l_ptr = n_ptr->links[i];
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900314 if (!l_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100315 continue;
316 l_ptr->reset_checkpoint = l_ptr->next_in_no;
317 l_ptr->exp_msg_count = 0;
Per Liden4323add2006-01-18 00:38:21 +0100318 tipc_link_reset_fragments(l_ptr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100319 }
320
321 /* Notify subscribers */
Allan Stephensf1379172011-02-23 14:13:41 -0500322 tipc_nodesub_notify(n_ptr);
Allan Stephens5a68d5e2010-08-17 11:00:16 +0000323
Allan Stephensb4b56102011-05-27 11:00:51 -0400324 /* Prevent re-contact with node until cleanup is done */
Allan Stephensb4b56102011-05-27 11:00:51 -0400325 n_ptr->block_setup = WAIT_PEER_DOWN | WAIT_NAMES_GONE;
326 tipc_k_signal((Handler)node_name_purge_complete, n_ptr->addr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100327}
328
Per Liden4323add2006-01-18 00:38:21 +0100329struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100330{
331 u32 domain;
332 struct sk_buff *buf;
David S. Miller6c000552008-09-02 23:38:32 -0700333 struct tipc_node *n_ptr;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900334 struct tipc_node_info node_info;
Allan Stephensea138472006-06-29 12:33:20 -0700335 u32 payload_size;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100336
337 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
Per Liden4323add2006-01-18 00:38:21 +0100338 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100339
Al Viro3e6c8cd2006-11-08 00:19:09 -0800340 domain = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Per Liden4323add2006-01-18 00:38:21 +0100341 if (!tipc_addr_domain_valid(domain))
342 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
343 " (network address)");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100344
Ying Xue46651c52014-03-27 12:54:36 +0800345 spin_lock_bh(&node_list_lock);
Allan Stephens672d99e2011-02-25 18:42:52 -0500346 if (!tipc_num_nodes) {
Ying Xue46651c52014-03-27 12:54:36 +0800347 spin_unlock_bh(&node_list_lock);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900348 return tipc_cfg_reply_none();
Allan Stephens1aad72d2008-07-14 22:44:58 -0700349 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100350
Allan Stephens08c80e92010-12-31 18:59:17 +0000351 /* For now, get space for all other nodes */
Allan Stephens672d99e2011-02-25 18:42:52 -0500352 payload_size = TLV_SPACE(sizeof(node_info)) * tipc_num_nodes;
Allan Stephens1aad72d2008-07-14 22:44:58 -0700353 if (payload_size > 32768u) {
Ying Xue46651c52014-03-27 12:54:36 +0800354 spin_unlock_bh(&node_list_lock);
Allan Stephensea138472006-06-29 12:33:20 -0700355 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
356 " (too many nodes)");
Allan Stephens1aad72d2008-07-14 22:44:58 -0700357 }
Ying Xue22206462014-03-27 12:54:38 +0800358 spin_unlock_bh(&node_list_lock);
359
Allan Stephensea138472006-06-29 12:33:20 -0700360 buf = tipc_cfg_reply_alloc(payload_size);
Ying Xue22206462014-03-27 12:54:38 +0800361 if (!buf)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100362 return NULL;
363
364 /* Add TLVs for all nodes in scope */
Ying Xue6c7a7622014-03-27 12:54:37 +0800365 rcu_read_lock();
366 list_for_each_entry_rcu(n_ptr, &tipc_node_list, list) {
Allan Stephens672d99e2011-02-25 18:42:52 -0500367 if (!tipc_in_scope(domain, n_ptr->addr))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100368 continue;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900369 node_info.addr = htonl(n_ptr->addr);
370 node_info.up = htonl(tipc_node_is_up(n_ptr));
371 tipc_cfg_append_tlv(buf, TIPC_TLV_NODE_INFO,
Per Liden4323add2006-01-18 00:38:21 +0100372 &node_info, sizeof(node_info));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100373 }
Ying Xue6c7a7622014-03-27 12:54:37 +0800374 rcu_read_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100375 return buf;
376}
377
Per Liden4323add2006-01-18 00:38:21 +0100378struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100379{
380 u32 domain;
381 struct sk_buff *buf;
David S. Miller6c000552008-09-02 23:38:32 -0700382 struct tipc_node *n_ptr;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900383 struct tipc_link_info link_info;
Allan Stephensea138472006-06-29 12:33:20 -0700384 u32 payload_size;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100385
386 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
Per Liden4323add2006-01-18 00:38:21 +0100387 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100388
Al Viro3e6c8cd2006-11-08 00:19:09 -0800389 domain = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Per Liden4323add2006-01-18 00:38:21 +0100390 if (!tipc_addr_domain_valid(domain))
391 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
392 " (network address)");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100393
Allan Stephensb58343f2011-11-08 13:48:28 -0500394 if (!tipc_own_addr)
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900395 return tipc_cfg_reply_none();
396
Ying Xue46651c52014-03-27 12:54:36 +0800397 spin_lock_bh(&node_list_lock);
Allan Stephens7a54d4a2011-10-27 14:17:53 -0400398 /* Get space for all unicast links + broadcast link */
Ying Xuedde20262014-03-27 12:54:39 +0800399 payload_size = TLV_SPACE((sizeof(link_info)) * (tipc_num_links + 1));
Allan Stephens1aad72d2008-07-14 22:44:58 -0700400 if (payload_size > 32768u) {
Ying Xue46651c52014-03-27 12:54:36 +0800401 spin_unlock_bh(&node_list_lock);
Allan Stephensea138472006-06-29 12:33:20 -0700402 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
403 " (too many links)");
Allan Stephens1aad72d2008-07-14 22:44:58 -0700404 }
Ying Xuedde20262014-03-27 12:54:39 +0800405 spin_unlock_bh(&node_list_lock);
406
Allan Stephensea138472006-06-29 12:33:20 -0700407 buf = tipc_cfg_reply_alloc(payload_size);
Ying Xuedde20262014-03-27 12:54:39 +0800408 if (!buf)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100409 return NULL;
410
411 /* Add TLV for broadcast link */
Allan Stephensa3796f82011-02-23 11:44:49 -0500412 link_info.dest = htonl(tipc_cluster_mask(tipc_own_addr));
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900413 link_info.up = htonl(1);
Stephen Hemminger4b704d52009-03-18 19:11:29 -0700414 strlcpy(link_info.str, tipc_bclink_name, TIPC_MAX_LINK_NAME);
Per Liden4323add2006-01-18 00:38:21 +0100415 tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO, &link_info, sizeof(link_info));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100416
417 /* Add TLVs for any other links in scope */
Ying Xue6c7a7622014-03-27 12:54:37 +0800418 rcu_read_lock();
419 list_for_each_entry_rcu(n_ptr, &tipc_node_list, list) {
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900420 u32 i;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100421
Allan Stephens672d99e2011-02-25 18:42:52 -0500422 if (!tipc_in_scope(domain, n_ptr->addr))
Per Lidenb97bf3f2006-01-02 19:04:38 +0100423 continue;
Allan Stephens1aad72d2008-07-14 22:44:58 -0700424 tipc_node_lock(n_ptr);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900425 for (i = 0; i < MAX_BEARERS; i++) {
426 if (!n_ptr->links[i])
427 continue;
428 link_info.dest = htonl(n_ptr->addr);
429 link_info.up = htonl(tipc_link_is_up(n_ptr->links[i]));
430 strcpy(link_info.str, n_ptr->links[i]->name);
431 tipc_cfg_append_tlv(buf, TIPC_TLV_LINK_INFO,
Per Liden4323add2006-01-18 00:38:21 +0100432 &link_info, sizeof(link_info));
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900433 }
Allan Stephens1aad72d2008-07-14 22:44:58 -0700434 tipc_node_unlock(n_ptr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100435 }
Ying Xue6c7a7622014-03-27 12:54:37 +0800436 rcu_read_unlock();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100437 return buf;
438}