Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/name_distr.c: TIPC name distribution code | |
c4307285 | 3 | * |
a5325ae5 | 4 | * Copyright (c) 2000-2006, 2014, Ericsson AB |
431697eb | 5 | * Copyright (c) 2005, 2010-2011, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #include "core.h" | |
b97bf3fd | 38 | #include "link.h" |
b97bf3fd PL |
39 | #include "name_distr.h" |
40 | ||
a5325ae5 EH |
41 | int sysctl_tipc_named_timeout __read_mostly = 2000; |
42 | ||
a5325ae5 EH |
43 | struct distr_queue_item { |
44 | struct distr_item i; | |
45 | u32 dtype; | |
46 | u32 node; | |
47 | unsigned long expires; | |
48 | struct list_head next; | |
49 | }; | |
50 | ||
b97bf3fd PL |
51 | /** |
52 | * publ_to_item - add publication info to a publication message | |
53 | */ | |
b97bf3fd PL |
54 | static void publ_to_item(struct distr_item *i, struct publication *p) |
55 | { | |
56 | i->type = htonl(p->type); | |
57 | i->lower = htonl(p->lower); | |
58 | i->upper = htonl(p->upper); | |
e50e73e1 | 59 | i->port = htonl(p->port); |
b97bf3fd | 60 | i->key = htonl(p->key); |
b97bf3fd PL |
61 | } |
62 | ||
63 | /** | |
64 | * named_prepare_buf - allocate & initialize a publication message | |
d2f394dc PB |
65 | * |
66 | * The buffer returned is of size INT_H_SIZE + payload size | |
b97bf3fd | 67 | */ |
34747539 YX |
68 | static struct sk_buff *named_prepare_buf(struct net *net, u32 type, u32 size, |
69 | u32 dest) | |
b97bf3fd | 70 | { |
57d5f64d | 71 | struct sk_buff *buf = tipc_buf_acquire(INT_H_SIZE + size, GFP_ATOMIC); |
23fd3eac | 72 | u32 self = tipc_own_addr(net); |
b97bf3fd PL |
73 | struct tipc_msg *msg; |
74 | ||
75 | if (buf != NULL) { | |
76 | msg = buf_msg(buf); | |
23fd3eac JM |
77 | tipc_msg_init(self, msg, NAME_DISTRIBUTOR, |
78 | type, INT_H_SIZE, dest); | |
741d9eb7 | 79 | msg_set_size(msg, INT_H_SIZE + size); |
b97bf3fd PL |
80 | } |
81 | return buf; | |
82 | } | |
83 | ||
84 | /** | |
4323add6 | 85 | * tipc_named_publish - tell other nodes about a new publication by this node |
b97bf3fd | 86 | */ |
4ac1c8d0 | 87 | struct sk_buff *tipc_named_publish(struct net *net, struct publication *publ) |
b97bf3fd | 88 | { |
64a52b26 | 89 | struct name_table *nt = tipc_name_table(net); |
b97bf3fd | 90 | struct distr_item *item; |
64a52b26 | 91 | struct sk_buff *skb; |
b97bf3fd | 92 | |
64a52b26 | 93 | if (publ->scope == TIPC_NODE_SCOPE) { |
935439cc | 94 | list_add_tail_rcu(&publ->binding_node, &nt->node_scope); |
eab8c045 | 95 | return NULL; |
64a52b26 | 96 | } |
988f3f16 JM |
97 | write_lock_bh(&nt->cluster_scope_lock); |
98 | list_add_tail(&publ->binding_node, &nt->cluster_scope); | |
99 | write_unlock_bh(&nt->cluster_scope_lock); | |
64a52b26 JM |
100 | skb = named_prepare_buf(net, PUBLICATION, ITEM_SIZE, 0); |
101 | if (!skb) { | |
2cf8aa19 | 102 | pr_warn("Publication distribution failure\n"); |
eab8c045 | 103 | return NULL; |
b97bf3fd PL |
104 | } |
105 | ||
64a52b26 | 106 | item = (struct distr_item *)msg_data(buf_msg(skb)); |
b97bf3fd | 107 | publ_to_item(item, publ); |
64a52b26 | 108 | return skb; |
b97bf3fd PL |
109 | } |
110 | ||
111 | /** | |
4323add6 | 112 | * tipc_named_withdraw - tell other nodes about a withdrawn publication by this node |
b97bf3fd | 113 | */ |
34747539 | 114 | struct sk_buff *tipc_named_withdraw(struct net *net, struct publication *publ) |
b97bf3fd | 115 | { |
988f3f16 | 116 | struct name_table *nt = tipc_name_table(net); |
b97bf3fd PL |
117 | struct sk_buff *buf; |
118 | struct distr_item *item; | |
119 | ||
988f3f16 JM |
120 | write_lock_bh(&nt->cluster_scope_lock); |
121 | list_del(&publ->binding_node); | |
122 | write_unlock_bh(&nt->cluster_scope_lock); | |
1110b8d3 | 123 | if (publ->scope == TIPC_NODE_SCOPE) |
eab8c045 | 124 | return NULL; |
1110b8d3 | 125 | |
34747539 | 126 | buf = named_prepare_buf(net, WITHDRAWAL, ITEM_SIZE, 0); |
b97bf3fd | 127 | if (!buf) { |
2cf8aa19 | 128 | pr_warn("Withdrawal distribution failure\n"); |
eab8c045 | 129 | return NULL; |
b97bf3fd PL |
130 | } |
131 | ||
132 | item = (struct distr_item *)msg_data(buf_msg(buf)); | |
133 | publ_to_item(item, publ); | |
eab8c045 | 134 | return buf; |
b97bf3fd PL |
135 | } |
136 | ||
dbdf6d24 | 137 | /** |
e11aa059 | 138 | * named_distribute - prepare name info for bulk distribution to another node |
a6ca1094 | 139 | * @list: list of messages (buffers) to be returned from this function |
dbdf6d24 JPM |
140 | * @dnode: node to be updated |
141 | * @pls: linked list of publication items to be packed into buffer chain | |
e11aa059 | 142 | */ |
f2f9800d YX |
143 | static void named_distribute(struct net *net, struct sk_buff_head *list, |
144 | u32 dnode, struct list_head *pls) | |
e11aa059 AS |
145 | { |
146 | struct publication *publ; | |
a6ca1094 | 147 | struct sk_buff *skb = NULL; |
e11aa059 | 148 | struct distr_item *item = NULL; |
d2f394dc PB |
149 | u32 msg_dsz = ((tipc_node_get_mtu(net, dnode, 0) - INT_H_SIZE) / |
150 | ITEM_SIZE) * ITEM_SIZE; | |
151 | u32 msg_rem = msg_dsz; | |
e11aa059 | 152 | |
988f3f16 | 153 | list_for_each_entry(publ, pls, binding_node) { |
dbdf6d24 | 154 | /* Prepare next buffer: */ |
a6ca1094 | 155 | if (!skb) { |
34747539 YX |
156 | skb = named_prepare_buf(net, PUBLICATION, msg_rem, |
157 | dnode); | |
a6ca1094 | 158 | if (!skb) { |
2cf8aa19 | 159 | pr_warn("Bulk publication failure\n"); |
e11aa059 AS |
160 | return; |
161 | } | |
06bd2b1e | 162 | msg_set_bc_ack_invalid(buf_msg(skb), true); |
a6ca1094 | 163 | item = (struct distr_item *)msg_data(buf_msg(skb)); |
e11aa059 | 164 | } |
dbdf6d24 JPM |
165 | |
166 | /* Pack publication into message: */ | |
e11aa059 AS |
167 | publ_to_item(item, publ); |
168 | item++; | |
dbdf6d24 JPM |
169 | msg_rem -= ITEM_SIZE; |
170 | ||
171 | /* Append full buffer to list: */ | |
172 | if (!msg_rem) { | |
a6ca1094 YX |
173 | __skb_queue_tail(list, skb); |
174 | skb = NULL; | |
1b61e70a | 175 | msg_rem = msg_dsz; |
e11aa059 AS |
176 | } |
177 | } | |
1b61e70a YX |
178 | if (skb) { |
179 | msg_set_size(buf_msg(skb), INT_H_SIZE + (msg_dsz - msg_rem)); | |
180 | skb_trim(skb, INT_H_SIZE + (msg_dsz - msg_rem)); | |
181 | __skb_queue_tail(list, skb); | |
182 | } | |
e11aa059 AS |
183 | } |
184 | ||
b97bf3fd | 185 | /** |
4323add6 | 186 | * tipc_named_node_up - tell specified node about all publications by this node |
b97bf3fd | 187 | */ |
f2f9800d | 188 | void tipc_named_node_up(struct net *net, u32 dnode) |
b97bf3fd | 189 | { |
64a52b26 | 190 | struct name_table *nt = tipc_name_table(net); |
a6ca1094 YX |
191 | struct sk_buff_head head; |
192 | ||
193 | __skb_queue_head_init(&head); | |
9aa88c2a | 194 | |
988f3f16 | 195 | read_lock_bh(&nt->cluster_scope_lock); |
64a52b26 | 196 | named_distribute(net, &head, dnode, &nt->cluster_scope); |
c49a0a84 | 197 | tipc_node_xmit(net, &head, dnode, 0); |
988f3f16 | 198 | read_unlock_bh(&nt->cluster_scope_lock); |
b97bf3fd PL |
199 | } |
200 | ||
201 | /** | |
a8f48af5 | 202 | * tipc_publ_purge - remove publication associated with a failed node |
c4307285 YH |
203 | * |
204 | * Invoked for each publication issued by a newly failed node. | |
b97bf3fd | 205 | * Removes publication structure from name table & deletes it. |
b97bf3fd | 206 | */ |
f2f9800d | 207 | static void tipc_publ_purge(struct net *net, struct publication *publ, u32 addr) |
b97bf3fd | 208 | { |
37922ea4 | 209 | struct tipc_net *tn = tipc_net(net); |
b97bf3fd | 210 | struct publication *p; |
f131072c | 211 | |
4ac1c8d0 | 212 | spin_lock_bh(&tn->nametbl_lock); |
37922ea4 JM |
213 | p = tipc_nametbl_remove_publ(net, publ->type, publ->lower, publ->upper, |
214 | publ->node, publ->key); | |
431697eb | 215 | if (p) |
935439cc | 216 | tipc_node_unsubscribe(net, &p->binding_node, addr); |
4ac1c8d0 | 217 | spin_unlock_bh(&tn->nametbl_lock); |
f131072c | 218 | |
c4307285 | 219 | if (p != publ) { |
2cf8aa19 | 220 | pr_err("Unable to remove publication from failed node\n" |
e50e73e1 JM |
221 | " (type=%u, lower=%u, node=0x%x, port=%u, key=%u)\n", |
222 | publ->type, publ->lower, publ->node, publ->port, | |
2cf8aa19 | 223 | publ->key); |
f131072c AS |
224 | } |
225 | ||
97ede29e | 226 | kfree_rcu(p, rcu); |
b97bf3fd PL |
227 | } |
228 | ||
ddb1d339 EH |
229 | /** |
230 | * tipc_dist_queue_purge - remove deferred updates from a node that went down | |
231 | */ | |
232 | static void tipc_dist_queue_purge(struct net *net, u32 addr) | |
233 | { | |
234 | struct tipc_net *tn = net_generic(net, tipc_net_id); | |
235 | struct distr_queue_item *e, *tmp; | |
236 | ||
237 | spin_lock_bh(&tn->nametbl_lock); | |
238 | list_for_each_entry_safe(e, tmp, &tn->dist_queue, next) { | |
239 | if (e->node != addr) | |
240 | continue; | |
241 | list_del(&e->next); | |
242 | kfree(e); | |
243 | } | |
244 | spin_unlock_bh(&tn->nametbl_lock); | |
245 | } | |
246 | ||
f2f9800d | 247 | void tipc_publ_notify(struct net *net, struct list_head *nsub_list, u32 addr) |
a8f48af5 YX |
248 | { |
249 | struct publication *publ, *tmp; | |
250 | ||
935439cc | 251 | list_for_each_entry_safe(publ, tmp, nsub_list, binding_node) |
f2f9800d | 252 | tipc_publ_purge(net, publ, addr); |
ddb1d339 | 253 | tipc_dist_queue_purge(net, addr); |
a8f48af5 YX |
254 | } |
255 | ||
f4ad8a4b EH |
256 | /** |
257 | * tipc_update_nametbl - try to process a nametable update and notify | |
258 | * subscribers | |
259 | * | |
260 | * tipc_nametbl_lock must be held. | |
261 | * Returns the publication item if successful, otherwise NULL. | |
262 | */ | |
f2f9800d YX |
263 | static bool tipc_update_nametbl(struct net *net, struct distr_item *i, |
264 | u32 node, u32 dtype) | |
f4ad8a4b | 265 | { |
37922ea4 JM |
266 | struct publication *p = NULL; |
267 | u32 lower = ntohl(i->lower); | |
268 | u32 upper = ntohl(i->upper); | |
269 | u32 type = ntohl(i->type); | |
270 | u32 port = ntohl(i->port); | |
271 | u32 key = ntohl(i->key); | |
f4ad8a4b EH |
272 | |
273 | if (dtype == PUBLICATION) { | |
37922ea4 JM |
274 | p = tipc_nametbl_insert_publ(net, type, lower, upper, |
275 | TIPC_CLUSTER_SCOPE, node, | |
276 | port, key); | |
277 | if (p) { | |
278 | tipc_node_subscribe(net, &p->binding_node, node); | |
0fc4dffa | 279 | return true; |
f4ad8a4b EH |
280 | } |
281 | } else if (dtype == WITHDRAWAL) { | |
37922ea4 JM |
282 | p = tipc_nametbl_remove_publ(net, type, lower, |
283 | upper, node, key); | |
284 | if (p) { | |
285 | tipc_node_unsubscribe(net, &p->binding_node, node); | |
286 | kfree_rcu(p, rcu); | |
0fc4dffa | 287 | return true; |
f4ad8a4b | 288 | } |
37922ea4 JM |
289 | pr_warn_ratelimited("Failed to remove binding %u,%u from %x\n", |
290 | type, lower, node); | |
f4ad8a4b EH |
291 | } else { |
292 | pr_warn("Unrecognized name table message received\n"); | |
293 | } | |
0fc4dffa | 294 | return false; |
f4ad8a4b EH |
295 | } |
296 | ||
b97bf3fd | 297 | /** |
c637c103 | 298 | * tipc_named_rcv - process name table update messages sent by another node |
b97bf3fd | 299 | */ |
c637c103 | 300 | void tipc_named_rcv(struct net *net, struct sk_buff_head *inputq) |
b97bf3fd | 301 | { |
4ac1c8d0 | 302 | struct tipc_net *tn = net_generic(net, tipc_net_id); |
c637c103 JPM |
303 | struct tipc_msg *msg; |
304 | struct distr_item *item; | |
305 | uint count; | |
306 | u32 node; | |
307 | struct sk_buff *skb; | |
308 | int mtype; | |
b97bf3fd | 309 | |
4ac1c8d0 | 310 | spin_lock_bh(&tn->nametbl_lock); |
c637c103 | 311 | for (skb = skb_dequeue(inputq); skb; skb = skb_dequeue(inputq)) { |
c7cad0d6 | 312 | skb_linearize(skb); |
c637c103 JPM |
313 | msg = buf_msg(skb); |
314 | mtype = msg_type(msg); | |
315 | item = (struct distr_item *)msg_data(msg); | |
316 | count = msg_data_sz(msg) / ITEM_SIZE; | |
317 | node = msg_orignode(msg); | |
318 | while (count--) { | |
37922ea4 | 319 | tipc_update_nametbl(net, item, node, mtype); |
c637c103 JPM |
320 | item++; |
321 | } | |
322 | kfree_skb(skb); | |
b97bf3fd | 323 | } |
4ac1c8d0 | 324 | spin_unlock_bh(&tn->nametbl_lock); |
b97bf3fd PL |
325 | } |
326 | ||
327 | /** | |
1110b8d3 | 328 | * tipc_named_reinit - re-initialize local publications |
c4307285 | 329 | * |
945af1c3 | 330 | * This routine is called whenever TIPC networking is enabled. |
1110b8d3 AS |
331 | * All name table entries published by this node are updated to reflect |
332 | * the node's new network address. | |
b97bf3fd | 333 | */ |
4ac1c8d0 | 334 | void tipc_named_reinit(struct net *net) |
b97bf3fd | 335 | { |
64a52b26 JM |
336 | struct name_table *nt = tipc_name_table(net); |
337 | struct tipc_net *tn = tipc_net(net); | |
b97bf3fd | 338 | struct publication *publ; |
23fd3eac | 339 | u32 self = tipc_own_addr(net); |
b97bf3fd | 340 | |
4ac1c8d0 | 341 | spin_lock_bh(&tn->nametbl_lock); |
945af1c3 | 342 | |
935439cc | 343 | list_for_each_entry_rcu(publ, &nt->node_scope, binding_node) |
23fd3eac | 344 | publ->node = self; |
935439cc | 345 | list_for_each_entry_rcu(publ, &nt->cluster_scope, binding_node) |
23fd3eac | 346 | publ->node = self; |
945af1c3 | 347 | |
4ac1c8d0 | 348 | spin_unlock_bh(&tn->nametbl_lock); |
b97bf3fd | 349 | } |