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Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/name_distr.c: TIPC name distribution code
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Erik Hugnea5325ae2014-08-28 09:08:47 +02004 * Copyright (c) 2000-2006, 2014, Ericsson AB
Allan Stephens431697e2011-02-23 13:51:15 -05005 * Copyright (c) 2005, 2010-2011, 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"
Per Lidenb97bf3f2006-01-02 19:04:38 +010038#include "link.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010039#include "name_distr.h"
40
Erik Hugnea5325ae2014-08-28 09:08:47 +020041int sysctl_tipc_named_timeout __read_mostly = 2000;
42
43/**
44 * struct tipc_dist_queue - queue holding deferred name table updates
45 */
46static struct list_head tipc_dist_queue = LIST_HEAD_INIT(tipc_dist_queue);
47
48struct distr_queue_item {
49 struct distr_item i;
50 u32 dtype;
51 u32 node;
52 unsigned long expires;
53 struct list_head next;
54};
55
Per Lidenb97bf3f2006-01-02 19:04:38 +010056/**
57 * publ_to_item - add publication info to a publication message
58 */
Per Lidenb97bf3f2006-01-02 19:04:38 +010059static void publ_to_item(struct distr_item *i, struct publication *p)
60{
61 i->type = htonl(p->type);
62 i->lower = htonl(p->lower);
63 i->upper = htonl(p->upper);
64 i->ref = htonl(p->ref);
65 i->key = htonl(p->key);
Per Lidenb97bf3f2006-01-02 19:04:38 +010066}
67
68/**
69 * named_prepare_buf - allocate & initialize a publication message
70 */
Ying Xue34747532015-01-09 15:27:10 +080071static struct sk_buff *named_prepare_buf(struct net *net, u32 type, u32 size,
72 u32 dest)
Per Lidenb97bf3f2006-01-02 19:04:38 +010073{
Allan Stephens741d9eb2011-05-31 15:03:18 -040074 struct sk_buff *buf = tipc_buf_acquire(INT_H_SIZE + size);
Per Lidenb97bf3f2006-01-02 19:04:38 +010075 struct tipc_msg *msg;
76
77 if (buf != NULL) {
78 msg = buf_msg(buf);
Ying Xue34747532015-01-09 15:27:10 +080079 tipc_msg_init(net, msg, NAME_DISTRIBUTOR, type, INT_H_SIZE,
80 dest);
Allan Stephens741d9eb2011-05-31 15:03:18 -040081 msg_set_size(msg, INT_H_SIZE + size);
Per Lidenb97bf3f2006-01-02 19:04:38 +010082 }
83 return buf;
84}
85
Ying Xuef2f98002015-01-09 15:27:05 +080086void named_cluster_distribute(struct net *net, struct sk_buff *skb)
Allan Stephens8f92df62010-12-31 18:59:19 +000087{
Ying Xuef2f98002015-01-09 15:27:05 +080088 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xuea6ca1092014-11-26 11:41:55 +080089 struct sk_buff *oskb;
Jon Paul Maloydbdf6d22014-07-16 20:40:58 -040090 struct tipc_node *node;
91 u32 dnode;
Allan Stephens8f92df62010-12-31 18:59:19 +000092
Ying Xue6c7a7622014-03-27 12:54:37 +080093 rcu_read_lock();
Ying Xuef2f98002015-01-09 15:27:05 +080094 list_for_each_entry_rcu(node, &tn->node_list, list) {
Jon Paul Maloydbdf6d22014-07-16 20:40:58 -040095 dnode = node->addr;
Ying Xue34747532015-01-09 15:27:10 +080096 if (in_own_node(net, dnode))
Jon Paul Maloydbdf6d22014-07-16 20:40:58 -040097 continue;
98 if (!tipc_node_active_links(node))
99 continue;
Ying Xuea6ca1092014-11-26 11:41:55 +0800100 oskb = skb_copy(skb, GFP_ATOMIC);
101 if (!oskb)
Jon Paul Maloydbdf6d22014-07-16 20:40:58 -0400102 break;
Ying Xuea6ca1092014-11-26 11:41:55 +0800103 msg_set_destnode(buf_msg(oskb), dnode);
Ying Xuef2f98002015-01-09 15:27:05 +0800104 tipc_link_xmit_skb(net, oskb, dnode, dnode);
Allan Stephens8f92df62010-12-31 18:59:19 +0000105 }
Ying Xue6c7a7622014-03-27 12:54:37 +0800106 rcu_read_unlock();
Allan Stephens8f92df62010-12-31 18:59:19 +0000107
Ying Xuea6ca1092014-11-26 11:41:55 +0800108 kfree_skb(skb);
Allan Stephens8f92df62010-12-31 18:59:19 +0000109}
110
Per Lidenb97bf3f2006-01-02 19:04:38 +0100111/**
Per Liden4323add2006-01-18 00:38:21 +0100112 * tipc_named_publish - tell other nodes about a new publication by this node
Per Lidenb97bf3f2006-01-02 19:04:38 +0100113 */
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800114struct sk_buff *tipc_named_publish(struct net *net, struct publication *publ)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100115{
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800116 struct tipc_net *tn = net_generic(net, tipc_net_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100117 struct sk_buff *buf;
118 struct distr_item *item;
119
Ying Xue97ede292014-12-02 15:00:30 +0800120 list_add_tail_rcu(&publ->local_list,
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800121 &tn->nametbl->publ_list[publ->scope]);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100122
Allan Stephens1110b8d2012-04-17 17:57:52 -0400123 if (publ->scope == TIPC_NODE_SCOPE)
Ying Xueeab8c0452014-04-28 18:00:10 +0800124 return NULL;
Allan Stephens1110b8d2012-04-17 17:57:52 -0400125
Ying Xue34747532015-01-09 15:27:10 +0800126 buf = named_prepare_buf(net, PUBLICATION, ITEM_SIZE, 0);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100127 if (!buf) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400128 pr_warn("Publication distribution failure\n");
Ying Xueeab8c0452014-04-28 18:00:10 +0800129 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100130 }
131
132 item = (struct distr_item *)msg_data(buf_msg(buf));
133 publ_to_item(item, publ);
Ying Xueeab8c0452014-04-28 18:00:10 +0800134 return buf;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100135}
136
137/**
Per Liden4323add2006-01-18 00:38:21 +0100138 * tipc_named_withdraw - tell other nodes about a withdrawn publication by this node
Per Lidenb97bf3f2006-01-02 19:04:38 +0100139 */
Ying Xue34747532015-01-09 15:27:10 +0800140struct sk_buff *tipc_named_withdraw(struct net *net, struct publication *publ)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100141{
142 struct sk_buff *buf;
143 struct distr_item *item;
144
145 list_del(&publ->local_list);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100146
Allan Stephens1110b8d2012-04-17 17:57:52 -0400147 if (publ->scope == TIPC_NODE_SCOPE)
Ying Xueeab8c0452014-04-28 18:00:10 +0800148 return NULL;
Allan Stephens1110b8d2012-04-17 17:57:52 -0400149
Ying Xue34747532015-01-09 15:27:10 +0800150 buf = named_prepare_buf(net, WITHDRAWAL, ITEM_SIZE, 0);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100151 if (!buf) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400152 pr_warn("Withdrawal distribution failure\n");
Ying Xueeab8c0452014-04-28 18:00:10 +0800153 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100154 }
155
156 item = (struct distr_item *)msg_data(buf_msg(buf));
157 publ_to_item(item, publ);
Ying Xueeab8c0452014-04-28 18:00:10 +0800158 return buf;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100159}
160
Jon Paul Maloydbdf6d22014-07-16 20:40:58 -0400161/**
Allan Stephense11aa052012-04-17 17:57:52 -0400162 * named_distribute - prepare name info for bulk distribution to another node
Ying Xuea6ca1092014-11-26 11:41:55 +0800163 * @list: list of messages (buffers) to be returned from this function
Jon Paul Maloydbdf6d22014-07-16 20:40:58 -0400164 * @dnode: node to be updated
165 * @pls: linked list of publication items to be packed into buffer chain
Allan Stephense11aa052012-04-17 17:57:52 -0400166 */
Ying Xuef2f98002015-01-09 15:27:05 +0800167static void named_distribute(struct net *net, struct sk_buff_head *list,
168 u32 dnode, struct list_head *pls)
Allan Stephense11aa052012-04-17 17:57:52 -0400169{
170 struct publication *publ;
Ying Xuea6ca1092014-11-26 11:41:55 +0800171 struct sk_buff *skb = NULL;
Allan Stephense11aa052012-04-17 17:57:52 -0400172 struct distr_item *item = NULL;
Ying Xuef2f98002015-01-09 15:27:05 +0800173 uint msg_dsz = (tipc_node_get_mtu(net, dnode, 0) / ITEM_SIZE) *
174 ITEM_SIZE;
Ying Xue1b61e702014-12-02 15:00:23 +0800175 uint msg_rem = msg_dsz;
Allan Stephense11aa052012-04-17 17:57:52 -0400176
Ying Xue993bfe52014-12-02 15:00:24 +0800177 list_for_each_entry(publ, pls, local_list) {
Jon Paul Maloydbdf6d22014-07-16 20:40:58 -0400178 /* Prepare next buffer: */
Ying Xuea6ca1092014-11-26 11:41:55 +0800179 if (!skb) {
Ying Xue34747532015-01-09 15:27:10 +0800180 skb = named_prepare_buf(net, PUBLICATION, msg_rem,
181 dnode);
Ying Xuea6ca1092014-11-26 11:41:55 +0800182 if (!skb) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400183 pr_warn("Bulk publication failure\n");
Allan Stephense11aa052012-04-17 17:57:52 -0400184 return;
185 }
Ying Xuea6ca1092014-11-26 11:41:55 +0800186 item = (struct distr_item *)msg_data(buf_msg(skb));
Allan Stephense11aa052012-04-17 17:57:52 -0400187 }
Jon Paul Maloydbdf6d22014-07-16 20:40:58 -0400188
189 /* Pack publication into message: */
Allan Stephense11aa052012-04-17 17:57:52 -0400190 publ_to_item(item, publ);
191 item++;
Jon Paul Maloydbdf6d22014-07-16 20:40:58 -0400192 msg_rem -= ITEM_SIZE;
193
194 /* Append full buffer to list: */
195 if (!msg_rem) {
Ying Xuea6ca1092014-11-26 11:41:55 +0800196 __skb_queue_tail(list, skb);
197 skb = NULL;
Ying Xue1b61e702014-12-02 15:00:23 +0800198 msg_rem = msg_dsz;
Allan Stephense11aa052012-04-17 17:57:52 -0400199 }
200 }
Ying Xue1b61e702014-12-02 15:00:23 +0800201 if (skb) {
202 msg_set_size(buf_msg(skb), INT_H_SIZE + (msg_dsz - msg_rem));
203 skb_trim(skb, INT_H_SIZE + (msg_dsz - msg_rem));
204 __skb_queue_tail(list, skb);
205 }
Allan Stephense11aa052012-04-17 17:57:52 -0400206}
207
Per Lidenb97bf3f2006-01-02 19:04:38 +0100208/**
Per Liden4323add2006-01-18 00:38:21 +0100209 * tipc_named_node_up - tell specified node about all publications by this node
Per Lidenb97bf3f2006-01-02 19:04:38 +0100210 */
Ying Xuef2f98002015-01-09 15:27:05 +0800211void tipc_named_node_up(struct net *net, u32 dnode)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100212{
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800213 struct tipc_net *tn = net_generic(net, tipc_net_id);
Ying Xuea6ca1092014-11-26 11:41:55 +0800214 struct sk_buff_head head;
215
216 __skb_queue_head_init(&head);
Allan Stephens9aa88c22011-05-31 13:38:02 -0400217
Ying Xue97ede292014-12-02 15:00:30 +0800218 rcu_read_lock();
Ying Xuef2f98002015-01-09 15:27:05 +0800219 named_distribute(net, &head, dnode,
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800220 &tn->nametbl->publ_list[TIPC_CLUSTER_SCOPE]);
Ying Xuef2f98002015-01-09 15:27:05 +0800221 named_distribute(net, &head, dnode,
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800222 &tn->nametbl->publ_list[TIPC_ZONE_SCOPE]);
Ying Xue97ede292014-12-02 15:00:30 +0800223 rcu_read_unlock();
Allan Stephens9aa88c22011-05-31 13:38:02 -0400224
Ying Xuef2f98002015-01-09 15:27:05 +0800225 tipc_link_xmit(net, &head, dnode, dnode);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100226}
227
Ying Xuef2f98002015-01-09 15:27:05 +0800228static void tipc_publ_subscribe(struct net *net, struct publication *publ,
229 u32 addr)
Ying Xuea8f48af2014-11-26 11:41:45 +0800230{
231 struct tipc_node *node;
232
Ying Xue34747532015-01-09 15:27:10 +0800233 if (in_own_node(net, addr))
Ying Xuea8f48af2014-11-26 11:41:45 +0800234 return;
235
Ying Xuef2f98002015-01-09 15:27:05 +0800236 node = tipc_node_find(net, addr);
Ying Xuea8f48af2014-11-26 11:41:45 +0800237 if (!node) {
238 pr_warn("Node subscription rejected, unknown node 0x%x\n",
239 addr);
240 return;
241 }
242
243 tipc_node_lock(node);
244 list_add_tail(&publ->nodesub_list, &node->publ_list);
245 tipc_node_unlock(node);
246}
247
Ying Xuef2f98002015-01-09 15:27:05 +0800248static void tipc_publ_unsubscribe(struct net *net, struct publication *publ,
249 u32 addr)
Ying Xuea8f48af2014-11-26 11:41:45 +0800250{
251 struct tipc_node *node;
252
Ying Xuef2f98002015-01-09 15:27:05 +0800253 node = tipc_node_find(net, addr);
Ying Xuea8f48af2014-11-26 11:41:45 +0800254 if (!node)
255 return;
256
257 tipc_node_lock(node);
258 list_del_init(&publ->nodesub_list);
259 tipc_node_unlock(node);
260}
261
Per Lidenb97bf3f2006-01-02 19:04:38 +0100262/**
Ying Xuea8f48af2014-11-26 11:41:45 +0800263 * tipc_publ_purge - remove publication associated with a failed node
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900264 *
265 * Invoked for each publication issued by a newly failed node.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100266 * Removes publication structure from name table & deletes it.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100267 */
Ying Xuef2f98002015-01-09 15:27:05 +0800268static void tipc_publ_purge(struct net *net, struct publication *publ, u32 addr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100269{
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800270 struct tipc_net *tn = net_generic(net, tipc_net_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100271 struct publication *p;
Allan Stephensf1310722006-06-25 23:51:37 -0700272
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800273 spin_lock_bh(&tn->nametbl_lock);
274 p = tipc_nametbl_remove_publ(net, publ->type, publ->lower,
Per Liden4323add2006-01-18 00:38:21 +0100275 publ->node, publ->ref, publ->key);
Allan Stephens431697e2011-02-23 13:51:15 -0500276 if (p)
Ying Xuef2f98002015-01-09 15:27:05 +0800277 tipc_publ_unsubscribe(net, p, addr);
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800278 spin_unlock_bh(&tn->nametbl_lock);
Allan Stephensf1310722006-06-25 23:51:37 -0700279
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900280 if (p != publ) {
Erik Hugne2cf8aa12012-06-29 00:16:37 -0400281 pr_err("Unable to remove publication from failed node\n"
282 " (type=%u, lower=%u, node=0x%x, ref=%u, key=%u)\n",
283 publ->type, publ->lower, publ->node, publ->ref,
284 publ->key);
Allan Stephensf1310722006-06-25 23:51:37 -0700285 }
286
Ying Xue97ede292014-12-02 15:00:30 +0800287 kfree_rcu(p, rcu);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100288}
289
Ying Xuef2f98002015-01-09 15:27:05 +0800290void tipc_publ_notify(struct net *net, struct list_head *nsub_list, u32 addr)
Ying Xuea8f48af2014-11-26 11:41:45 +0800291{
292 struct publication *publ, *tmp;
293
294 list_for_each_entry_safe(publ, tmp, nsub_list, nodesub_list)
Ying Xuef2f98002015-01-09 15:27:05 +0800295 tipc_publ_purge(net, publ, addr);
Ying Xuea8f48af2014-11-26 11:41:45 +0800296}
297
Per Lidenb97bf3f2006-01-02 19:04:38 +0100298/**
Erik Hugnef4ad8a42014-08-28 09:08:46 +0200299 * tipc_update_nametbl - try to process a nametable update and notify
300 * subscribers
301 *
302 * tipc_nametbl_lock must be held.
303 * Returns the publication item if successful, otherwise NULL.
304 */
Ying Xuef2f98002015-01-09 15:27:05 +0800305static bool tipc_update_nametbl(struct net *net, struct distr_item *i,
306 u32 node, u32 dtype)
Erik Hugnef4ad8a42014-08-28 09:08:46 +0200307{
308 struct publication *publ = NULL;
309
310 if (dtype == PUBLICATION) {
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800311 publ = tipc_nametbl_insert_publ(net, ntohl(i->type),
312 ntohl(i->lower),
Erik Hugnef4ad8a42014-08-28 09:08:46 +0200313 ntohl(i->upper),
314 TIPC_CLUSTER_SCOPE, node,
315 ntohl(i->ref), ntohl(i->key));
316 if (publ) {
Ying Xuef2f98002015-01-09 15:27:05 +0800317 tipc_publ_subscribe(net, publ, node);
Erik Hugne0fc4dff2014-09-10 14:02:50 +0200318 return true;
Erik Hugnef4ad8a42014-08-28 09:08:46 +0200319 }
320 } else if (dtype == WITHDRAWAL) {
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800321 publ = tipc_nametbl_remove_publ(net, ntohl(i->type),
322 ntohl(i->lower),
Erik Hugnef4ad8a42014-08-28 09:08:46 +0200323 node, ntohl(i->ref),
324 ntohl(i->key));
325 if (publ) {
Ying Xuef2f98002015-01-09 15:27:05 +0800326 tipc_publ_unsubscribe(net, publ, node);
Ying Xue97ede292014-12-02 15:00:30 +0800327 kfree_rcu(publ, rcu);
Erik Hugne0fc4dff2014-09-10 14:02:50 +0200328 return true;
Erik Hugnef4ad8a42014-08-28 09:08:46 +0200329 }
330 } else {
331 pr_warn("Unrecognized name table message received\n");
332 }
Erik Hugne0fc4dff2014-09-10 14:02:50 +0200333 return false;
Erik Hugnef4ad8a42014-08-28 09:08:46 +0200334}
335
336/**
Erik Hugnea5325ae2014-08-28 09:08:47 +0200337 * tipc_named_add_backlog - add a failed name table update to the backlog
338 *
339 */
340static void tipc_named_add_backlog(struct distr_item *i, u32 type, u32 node)
341{
342 struct distr_queue_item *e;
343 unsigned long now = get_jiffies_64();
344
345 e = kzalloc(sizeof(*e), GFP_ATOMIC);
346 if (!e)
347 return;
348 e->dtype = type;
349 e->node = node;
350 e->expires = now + msecs_to_jiffies(sysctl_tipc_named_timeout);
351 memcpy(e, i, sizeof(*i));
352 list_add_tail(&e->next, &tipc_dist_queue);
353}
354
355/**
356 * tipc_named_process_backlog - try to process any pending name table updates
357 * from the network.
358 */
Ying Xuef2f98002015-01-09 15:27:05 +0800359void tipc_named_process_backlog(struct net *net)
Erik Hugnea5325ae2014-08-28 09:08:47 +0200360{
361 struct distr_queue_item *e, *tmp;
362 char addr[16];
363 unsigned long now = get_jiffies_64();
364
365 list_for_each_entry_safe(e, tmp, &tipc_dist_queue, next) {
366 if (time_after(e->expires, now)) {
Ying Xuef2f98002015-01-09 15:27:05 +0800367 if (!tipc_update_nametbl(net, &e->i, e->node, e->dtype))
Erik Hugnea5325ae2014-08-28 09:08:47 +0200368 continue;
369 } else {
370 tipc_addr_string_fill(addr, e->node);
371 pr_warn_ratelimited("Dropping name table update (%d) of {%u, %u, %u} from %s key=%u\n",
372 e->dtype, ntohl(e->i.type),
373 ntohl(e->i.lower),
374 ntohl(e->i.upper),
375 addr, ntohl(e->i.key));
376 }
377 list_del(&e->next);
378 kfree(e);
379 }
380}
381
382/**
Ying Xue247f0f32014-02-18 16:06:46 +0800383 * tipc_named_rcv - process name table update message sent by another node
Per Lidenb97bf3f2006-01-02 19:04:38 +0100384 */
Ying Xuef2f98002015-01-09 15:27:05 +0800385void tipc_named_rcv(struct net *net, struct sk_buff *buf)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100386{
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800387 struct tipc_net *tn = net_generic(net, tipc_net_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100388 struct tipc_msg *msg = buf_msg(buf);
389 struct distr_item *item = (struct distr_item *)msg_data(msg);
390 u32 count = msg_data_sz(msg) / ITEM_SIZE;
Erik Hugnea5325ae2014-08-28 09:08:47 +0200391 u32 node = msg_orignode(msg);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100392
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800393 spin_lock_bh(&tn->nametbl_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100394 while (count--) {
Ying Xuef2f98002015-01-09 15:27:05 +0800395 if (!tipc_update_nametbl(net, item, node, msg_type(msg)))
Erik Hugnea5325ae2014-08-28 09:08:47 +0200396 tipc_named_add_backlog(item, msg_type(msg), node);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100397 item++;
398 }
Ying Xuef2f98002015-01-09 15:27:05 +0800399 tipc_named_process_backlog(net);
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800400 spin_unlock_bh(&tn->nametbl_lock);
Allan Stephens5f6d9122011-11-04 13:24:29 -0400401 kfree_skb(buf);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100402}
403
404/**
Allan Stephens1110b8d2012-04-17 17:57:52 -0400405 * tipc_named_reinit - re-initialize local publications
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900406 *
Allan Stephens945af1c2011-10-14 14:42:25 -0400407 * This routine is called whenever TIPC networking is enabled.
Allan Stephens1110b8d2012-04-17 17:57:52 -0400408 * All name table entries published by this node are updated to reflect
409 * the node's new network address.
Per Lidenb97bf3f2006-01-02 19:04:38 +0100410 */
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800411void tipc_named_reinit(struct net *net)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100412{
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800413 struct tipc_net *tn = net_generic(net, tipc_net_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100414 struct publication *publ;
Allan Stephensa9098042012-04-17 17:57:52 -0400415 int scope;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100416
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800417 spin_lock_bh(&tn->nametbl_lock);
Allan Stephens945af1c2011-10-14 14:42:25 -0400418
Allan Stephens1110b8d2012-04-17 17:57:52 -0400419 for (scope = TIPC_ZONE_SCOPE; scope <= TIPC_NODE_SCOPE; scope++)
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800420 list_for_each_entry_rcu(publ, &tn->nametbl->publ_list[scope],
Ying Xue97ede292014-12-02 15:00:30 +0800421 local_list)
Ying Xue34747532015-01-09 15:27:10 +0800422 publ->node = tn->own_addr;
Allan Stephens945af1c2011-10-14 14:42:25 -0400423
Ying Xue4ac1c8d2015-01-09 15:27:09 +0800424 spin_unlock_bh(&tn->nametbl_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100425}