blob: ca3544d030c7f9177fbe426e9f955c4655c157cc [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/config.c: TIPC configuration management code
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Per Liden593a5f22006-01-11 19:14:19 +01004 * Copyright (c) 2002-2006, Ericsson AB
Allan Stephens59f0c452008-05-21 14:52:30 -07005 * Copyright (c) 2004-2007, 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 "dbg.h"
39#include "bearer.h"
40#include "port.h"
41#include "link.h"
42#include "zone.h"
43#include "addr.h"
44#include "name_table.h"
45#include "node.h"
46#include "config.h"
47#include "discover.h"
48
49struct subscr_data {
50 char usr_handle[8];
51 u32 domain;
52 u32 port_ref;
53 struct list_head subd_list;
54};
55
56struct manager {
57 u32 user_ref;
58 u32 port_ref;
59 u32 subscr_ref;
60 u32 link_subscriptions;
61 struct list_head link_subscribers;
62};
63
64static struct manager mng = { 0};
65
Ingo Molnar34af9462006-06-27 02:53:55 -070066static DEFINE_SPINLOCK(config_lock);
Per Lidenb97bf3f2006-01-02 19:04:38 +010067
68static const void *req_tlv_area; /* request message TLV area */
69static int req_tlv_space; /* request message TLV area size */
70static int rep_headroom; /* reply message headroom to use */
71
72
Per Liden4323add2006-01-18 00:38:21 +010073void tipc_cfg_link_event(u32 addr, char *name, int up)
Per Lidenb97bf3f2006-01-02 19:04:38 +010074{
75 /* TIPC DOESN'T HANDLE LINK EVENT SUBSCRIPTIONS AT THE MOMENT */
76}
77
78
Per Liden4323add2006-01-18 00:38:21 +010079struct sk_buff *tipc_cfg_reply_alloc(int payload_size)
Per Lidenb97bf3f2006-01-02 19:04:38 +010080{
81 struct sk_buff *buf;
82
83 buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC);
84 if (buf)
85 skb_reserve(buf, rep_headroom);
86 return buf;
87}
88
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090089int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
Per Liden4323add2006-01-18 00:38:21 +010090 void *tlv_data, int tlv_data_size)
Per Lidenb97bf3f2006-01-02 19:04:38 +010091{
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -070092 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(buf);
Per Lidenb97bf3f2006-01-02 19:04:38 +010093 int new_tlv_space = TLV_SPACE(tlv_data_size);
94
95 if (skb_tailroom(buf) < new_tlv_space) {
Per Liden4323add2006-01-18 00:38:21 +010096 dbg("tipc_cfg_append_tlv unable to append TLV\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +010097 return 0;
98 }
99 skb_put(buf, new_tlv_space);
100 tlv->tlv_type = htons(tlv_type);
101 tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size));
102 if (tlv_data_size && tlv_data)
103 memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size);
104 return 1;
105}
106
Per Liden4323add2006-01-18 00:38:21 +0100107struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100108{
109 struct sk_buff *buf;
Al Viro3e6c8cd2006-11-08 00:19:09 -0800110 __be32 value_net;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100111
Per Liden4323add2006-01-18 00:38:21 +0100112 buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value)));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100113 if (buf) {
114 value_net = htonl(value);
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900115 tipc_cfg_append_tlv(buf, tlv_type, &value_net,
Per Liden4323add2006-01-18 00:38:21 +0100116 sizeof(value_net));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100117 }
118 return buf;
119}
120
Per Liden4323add2006-01-18 00:38:21 +0100121struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100122{
123 struct sk_buff *buf;
124 int string_len = strlen(string) + 1;
125
Per Liden4323add2006-01-18 00:38:21 +0100126 buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100127 if (buf)
Per Liden4323add2006-01-18 00:38:21 +0100128 tipc_cfg_append_tlv(buf, tlv_type, string, string_len);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100129 return buf;
130}
131
132
133
134
135#if 0
136
137/* Now obsolete code for handling commands not yet implemented the new way */
138
139int tipc_cfg_cmd(const struct tipc_cmd_msg * msg,
140 char *data,
141 u32 sz,
142 u32 *ret_size,
143 struct tipc_portid *orig)
144{
145 int rv = -EINVAL;
146 u32 cmd = msg->cmd;
147
148 *ret_size = 0;
149 switch (cmd) {
150 case TIPC_REMOVE_LINK:
151 case TIPC_CMD_BLOCK_LINK:
152 case TIPC_CMD_UNBLOCK_LINK:
153 if (!cfg_check_connection(orig))
154 rv = link_control(msg->argv.link_name, msg->cmd, 0);
155 break;
156 case TIPC_ESTABLISH:
157 {
158 int connected;
159
160 tipc_isconnected(mng.conn_port_ref, &connected);
161 if (connected || !orig) {
162 rv = TIPC_FAILURE;
163 break;
164 }
165 rv = tipc_connect2port(mng.conn_port_ref, orig);
166 if (rv == TIPC_OK)
167 orig = 0;
168 break;
169 }
170 case TIPC_GET_PEER_ADDRESS:
171 *ret_size = link_peer_addr(msg->argv.link_name, data, sz);
172 break;
173 case TIPC_GET_ROUTES:
174 rv = TIPC_OK;
175 break;
176 default: {}
177 }
178 if (*ret_size)
179 rv = TIPC_OK;
180 return rv;
181}
182
183static void cfg_cmd_event(struct tipc_cmd_msg *msg,
184 char *data,
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900185 u32 sz,
Per Lidenb97bf3f2006-01-02 19:04:38 +0100186 struct tipc_portid const *orig)
187{
188 int rv = -EINVAL;
189 struct tipc_cmd_result_msg rmsg;
190 struct iovec msg_sect[2];
191 int *arg;
192
193 msg->cmd = ntohl(msg->cmd);
194
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900195 cfg_prepare_res_msg(msg->cmd, msg->usr_handle, rv, &rmsg, msg_sect,
Per Lidenb97bf3f2006-01-02 19:04:38 +0100196 data, 0);
197 if (ntohl(msg->magic) != TIPC_MAGIC)
198 goto exit;
199
200 switch (msg->cmd) {
201 case TIPC_CREATE_LINK:
202 if (!cfg_check_connection(orig))
203 rv = disc_create_link(&msg->argv.create_link);
204 break;
205 case TIPC_LINK_SUBSCRIBE:
206 {
207 struct subscr_data *sub;
208
209 if (mng.link_subscriptions > 64)
210 break;
Robert P. J. Day5cbded52006-12-13 00:35:56 -0800211 sub = kmalloc(sizeof(*sub),
Per Lidenb97bf3f2006-01-02 19:04:38 +0100212 GFP_ATOMIC);
213 if (sub == NULL) {
214 warn("Memory squeeze; dropped remote link subscription\n");
215 break;
216 }
217 INIT_LIST_HEAD(&sub->subd_list);
218 tipc_createport(mng.user_ref,
219 (void *)sub,
220 TIPC_HIGH_IMPORTANCE,
221 0,
222 0,
223 (tipc_conn_shutdown_event)cfg_linksubscr_cancel,
224 0,
225 0,
226 (tipc_conn_msg_event)cfg_linksubscr_cancel,
227 0,
228 &sub->port_ref);
229 if (!sub->port_ref) {
230 kfree(sub);
231 break;
232 }
233 memcpy(sub->usr_handle,msg->usr_handle,
234 sizeof(sub->usr_handle));
235 sub->domain = msg->argv.domain;
236 list_add_tail(&sub->subd_list, &mng.link_subscribers);
237 tipc_connect2port(sub->port_ref, orig);
238 rmsg.retval = TIPC_OK;
239 tipc_send(sub->port_ref, 2u, msg_sect);
240 mng.link_subscriptions++;
241 return;
242 }
243 default:
244 rv = tipc_cfg_cmd(msg, data, sz, (u32 *)&msg_sect[1].iov_len, orig);
245 }
246 exit:
247 rmsg.result_len = htonl(msg_sect[1].iov_len);
248 rmsg.retval = htonl(rv);
Per Liden4323add2006-01-18 00:38:21 +0100249 tipc_cfg_respond(msg_sect, 2u, orig);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100250}
251#endif
252
253static struct sk_buff *cfg_enable_bearer(void)
254{
255 struct tipc_bearer_config *args;
256
257 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG))
Per Liden4323add2006-01-18 00:38:21 +0100258 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100259
260 args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area);
261 if (tipc_enable_bearer(args->name,
262 ntohl(args->detect_scope),
263 ntohl(args->priority)))
Per Liden4323add2006-01-18 00:38:21 +0100264 return tipc_cfg_reply_error_string("unable to enable bearer");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100265
Per Liden4323add2006-01-18 00:38:21 +0100266 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100267}
268
269static struct sk_buff *cfg_disable_bearer(void)
270{
271 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME))
Per Liden4323add2006-01-18 00:38:21 +0100272 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100273
274 if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area)))
Per Liden4323add2006-01-18 00:38:21 +0100275 return tipc_cfg_reply_error_string("unable to disable bearer");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100276
Per Liden4323add2006-01-18 00:38:21 +0100277 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100278}
279
280static struct sk_buff *cfg_set_own_addr(void)
281{
282 u32 addr;
283
284 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
Per Liden4323add2006-01-18 00:38:21 +0100285 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100286
Al Viro3e6c8cd2006-11-08 00:19:09 -0800287 addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100288 if (addr == tipc_own_addr)
Per Liden4323add2006-01-18 00:38:21 +0100289 return tipc_cfg_reply_none();
290 if (!tipc_addr_node_valid(addr))
291 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
292 " (node address)");
Allan Stephense100ae92006-06-25 23:51:08 -0700293 if (tipc_mode == TIPC_NET_MODE)
Per Liden4323add2006-01-18 00:38:21 +0100294 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
295 " (cannot change node address once assigned)");
Allan Stephense100ae92006-06-25 23:51:08 -0700296
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900297 /*
Allan Stephense100ae92006-06-25 23:51:08 -0700298 * Must release all spinlocks before calling start_net() because
299 * Linux version of TIPC calls eth_media_start() which calls
300 * register_netdevice_notifier() which may block!
301 *
302 * Temporarily releasing the lock should be harmless for non-Linux TIPC,
303 * but Linux version of eth_media_start() should really be reworked
304 * so that it can be called with spinlocks held.
305 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100306
307 spin_unlock_bh(&config_lock);
Allan Stephens03194372008-05-21 14:55:04 -0700308 tipc_core_start_net(addr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100309 spin_lock_bh(&config_lock);
Per Liden4323add2006-01-18 00:38:21 +0100310 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100311}
312
313static struct sk_buff *cfg_set_remote_mng(void)
314{
315 u32 value;
316
317 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100318 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100319
Al Viro3e6c8cd2006-11-08 00:19:09 -0800320 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100321 tipc_remote_management = (value != 0);
Per Liden4323add2006-01-18 00:38:21 +0100322 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100323}
324
325static struct sk_buff *cfg_set_max_publications(void)
326{
327 u32 value;
328
329 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100330 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100331
Al Viro3e6c8cd2006-11-08 00:19:09 -0800332 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100333 if (value != delimit(value, 1, 65535))
Per Liden4323add2006-01-18 00:38:21 +0100334 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
335 " (max publications must be 1-65535)");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100336 tipc_max_publications = value;
Per Liden4323add2006-01-18 00:38:21 +0100337 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100338}
339
340static struct sk_buff *cfg_set_max_subscriptions(void)
341{
342 u32 value;
343
344 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100345 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100346
Al Viro3e6c8cd2006-11-08 00:19:09 -0800347 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100348 if (value != delimit(value, 1, 65535))
Per Liden4323add2006-01-18 00:38:21 +0100349 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
350 " (max subscriptions must be 1-65535");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100351 tipc_max_subscriptions = value;
Per Liden4323add2006-01-18 00:38:21 +0100352 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100353}
354
355static struct sk_buff *cfg_set_max_ports(void)
356{
Per Lidenb97bf3f2006-01-02 19:04:38 +0100357 u32 value;
358
359 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100360 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Al Viro3e6c8cd2006-11-08 00:19:09 -0800361 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Allan Stephense100ae92006-06-25 23:51:08 -0700362 if (value == tipc_max_ports)
363 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100364 if (value != delimit(value, 127, 65535))
Per Liden4323add2006-01-18 00:38:21 +0100365 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
366 " (max ports must be 127-65535)");
Allan Stephense100ae92006-06-25 23:51:08 -0700367 if (tipc_mode != TIPC_NOT_RUNNING)
Per Liden4323add2006-01-18 00:38:21 +0100368 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
Allan Stephense100ae92006-06-25 23:51:08 -0700369 " (cannot change max ports while TIPC is active)");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100370 tipc_max_ports = value;
Per Liden4323add2006-01-18 00:38:21 +0100371 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100372}
373
374static struct sk_buff *cfg_set_max_zones(void)
375{
376 u32 value;
377
378 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100379 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Al Viro3e6c8cd2006-11-08 00:19:09 -0800380 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Allan Stephense100ae92006-06-25 23:51:08 -0700381 if (value == tipc_max_zones)
382 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100383 if (value != delimit(value, 1, 255))
Per Liden4323add2006-01-18 00:38:21 +0100384 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
385 " (max zones must be 1-255)");
Allan Stephense100ae92006-06-25 23:51:08 -0700386 if (tipc_mode == TIPC_NET_MODE)
387 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
388 " (cannot change max zones once TIPC has joined a network)");
389 tipc_max_zones = value;
390 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100391}
392
393static struct sk_buff *cfg_set_max_clusters(void)
394{
395 u32 value;
396
397 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100398 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Al Viro3e6c8cd2006-11-08 00:19:09 -0800399 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Allan Stephense100ae92006-06-25 23:51:08 -0700400 if (value != delimit(value, 1, 1))
401 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
Per Liden4323add2006-01-18 00:38:21 +0100402 " (max clusters fixed at 1)");
403 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100404}
405
406static struct sk_buff *cfg_set_max_nodes(void)
407{
408 u32 value;
409
410 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100411 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Al Viro3e6c8cd2006-11-08 00:19:09 -0800412 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Allan Stephense100ae92006-06-25 23:51:08 -0700413 if (value == tipc_max_nodes)
414 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100415 if (value != delimit(value, 8, 2047))
Per Liden4323add2006-01-18 00:38:21 +0100416 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
417 " (max nodes must be 8-2047)");
Allan Stephense100ae92006-06-25 23:51:08 -0700418 if (tipc_mode == TIPC_NET_MODE)
419 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
420 " (cannot change max nodes once TIPC has joined a network)");
421 tipc_max_nodes = value;
422 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100423}
424
425static struct sk_buff *cfg_set_max_slaves(void)
426{
427 u32 value;
428
429 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100430 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Al Viro3e6c8cd2006-11-08 00:19:09 -0800431 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100432 if (value != 0)
Per Liden4323add2006-01-18 00:38:21 +0100433 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
434 " (max secondary nodes fixed at 0)");
435 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100436}
437
438static struct sk_buff *cfg_set_netid(void)
439{
440 u32 value;
441
442 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
Per Liden4323add2006-01-18 00:38:21 +0100443 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
Al Viro3e6c8cd2006-11-08 00:19:09 -0800444 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
Allan Stephense100ae92006-06-25 23:51:08 -0700445 if (value == tipc_net_id)
446 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100447 if (value != delimit(value, 1, 9999))
Per Liden4323add2006-01-18 00:38:21 +0100448 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
449 " (network id must be 1-9999)");
Allan Stephense100ae92006-06-25 23:51:08 -0700450 if (tipc_mode == TIPC_NET_MODE)
Per Liden4323add2006-01-18 00:38:21 +0100451 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
Allan Stephense100ae92006-06-25 23:51:08 -0700452 " (cannot change network id once TIPC has joined a network)");
453 tipc_net_id = value;
454 return tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100455}
456
Per Liden4323add2006-01-18 00:38:21 +0100457struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area,
458 int request_space, int reply_headroom)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100459{
460 struct sk_buff *rep_tlv_buf;
461
462 spin_lock_bh(&config_lock);
463
464 /* Save request and reply details in a well-known location */
465
466 req_tlv_area = request_area;
467 req_tlv_space = request_space;
468 rep_headroom = reply_headroom;
469
470 /* Check command authorization */
471
472 if (likely(orig_node == tipc_own_addr)) {
473 /* command is permitted */
474 } else if (cmd >= 0x8000) {
Per Liden4323add2006-01-18 00:38:21 +0100475 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
476 " (cannot be done remotely)");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100477 goto exit;
478 } else if (!tipc_remote_management) {
Per Liden4323add2006-01-18 00:38:21 +0100479 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NO_REMOTE);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100480 goto exit;
481 }
482 else if (cmd >= 0x4000) {
483 u32 domain = 0;
484
Per Liden4323add2006-01-18 00:38:21 +0100485 if ((tipc_nametbl_translate(TIPC_ZM_SRV, 0, &domain) == 0) ||
Per Lidenb97bf3f2006-01-02 19:04:38 +0100486 (domain != orig_node)) {
Per Liden4323add2006-01-18 00:38:21 +0100487 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_ZONE_MSTR);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100488 goto exit;
489 }
490 }
491
492 /* Call appropriate processing routine */
493
494 switch (cmd) {
495 case TIPC_CMD_NOOP:
Per Liden4323add2006-01-18 00:38:21 +0100496 rep_tlv_buf = tipc_cfg_reply_none();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100497 break;
498 case TIPC_CMD_GET_NODES:
Per Liden4323add2006-01-18 00:38:21 +0100499 rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100500 break;
501 case TIPC_CMD_GET_LINKS:
Per Liden4323add2006-01-18 00:38:21 +0100502 rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100503 break;
504 case TIPC_CMD_SHOW_LINK_STATS:
Per Liden4323add2006-01-18 00:38:21 +0100505 rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100506 break;
507 case TIPC_CMD_RESET_LINK_STATS:
Per Liden4323add2006-01-18 00:38:21 +0100508 rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100509 break;
510 case TIPC_CMD_SHOW_NAME_TABLE:
Per Liden4323add2006-01-18 00:38:21 +0100511 rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100512 break;
513 case TIPC_CMD_GET_BEARER_NAMES:
Per Liden4323add2006-01-18 00:38:21 +0100514 rep_tlv_buf = tipc_bearer_get_names();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100515 break;
516 case TIPC_CMD_GET_MEDIA_NAMES:
Per Liden4323add2006-01-18 00:38:21 +0100517 rep_tlv_buf = tipc_media_get_names();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100518 break;
519 case TIPC_CMD_SHOW_PORTS:
Per Liden4323add2006-01-18 00:38:21 +0100520 rep_tlv_buf = tipc_port_get_ports();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100521 break;
522#if 0
523 case TIPC_CMD_SHOW_PORT_STATS:
524 rep_tlv_buf = port_show_stats(req_tlv_area, req_tlv_space);
525 break;
526 case TIPC_CMD_RESET_PORT_STATS:
Per Liden4323add2006-01-18 00:38:21 +0100527 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100528 break;
529#endif
530 case TIPC_CMD_SET_LOG_SIZE:
Allan Stephens025adbe2008-05-05 01:20:04 -0700531 rep_tlv_buf = tipc_log_resize_cmd(req_tlv_area, req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100532 break;
533 case TIPC_CMD_DUMP_LOG:
Per Liden4323add2006-01-18 00:38:21 +0100534 rep_tlv_buf = tipc_log_dump();
Per Lidenb97bf3f2006-01-02 19:04:38 +0100535 break;
536 case TIPC_CMD_SET_LINK_TOL:
537 case TIPC_CMD_SET_LINK_PRI:
538 case TIPC_CMD_SET_LINK_WINDOW:
Per Liden4323add2006-01-18 00:38:21 +0100539 rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100540 break;
541 case TIPC_CMD_ENABLE_BEARER:
542 rep_tlv_buf = cfg_enable_bearer();
543 break;
544 case TIPC_CMD_DISABLE_BEARER:
545 rep_tlv_buf = cfg_disable_bearer();
546 break;
547 case TIPC_CMD_SET_NODE_ADDR:
548 rep_tlv_buf = cfg_set_own_addr();
549 break;
550 case TIPC_CMD_SET_REMOTE_MNG:
551 rep_tlv_buf = cfg_set_remote_mng();
552 break;
553 case TIPC_CMD_SET_MAX_PORTS:
554 rep_tlv_buf = cfg_set_max_ports();
555 break;
556 case TIPC_CMD_SET_MAX_PUBL:
557 rep_tlv_buf = cfg_set_max_publications();
558 break;
559 case TIPC_CMD_SET_MAX_SUBSCR:
560 rep_tlv_buf = cfg_set_max_subscriptions();
561 break;
562 case TIPC_CMD_SET_MAX_ZONES:
563 rep_tlv_buf = cfg_set_max_zones();
564 break;
565 case TIPC_CMD_SET_MAX_CLUSTERS:
566 rep_tlv_buf = cfg_set_max_clusters();
567 break;
568 case TIPC_CMD_SET_MAX_NODES:
569 rep_tlv_buf = cfg_set_max_nodes();
570 break;
571 case TIPC_CMD_SET_MAX_SLAVES:
572 rep_tlv_buf = cfg_set_max_slaves();
573 break;
574 case TIPC_CMD_SET_NETID:
575 rep_tlv_buf = cfg_set_netid();
576 break;
577 case TIPC_CMD_GET_REMOTE_MNG:
Per Liden4323add2006-01-18 00:38:21 +0100578 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_remote_management);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100579 break;
580 case TIPC_CMD_GET_MAX_PORTS:
Per Liden4323add2006-01-18 00:38:21 +0100581 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100582 break;
583 case TIPC_CMD_GET_MAX_PUBL:
Per Liden4323add2006-01-18 00:38:21 +0100584 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_publications);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100585 break;
586 case TIPC_CMD_GET_MAX_SUBSCR:
Per Liden4323add2006-01-18 00:38:21 +0100587 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_subscriptions);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100588 break;
589 case TIPC_CMD_GET_MAX_ZONES:
Per Liden4323add2006-01-18 00:38:21 +0100590 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_zones);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100591 break;
592 case TIPC_CMD_GET_MAX_CLUSTERS:
Per Liden4323add2006-01-18 00:38:21 +0100593 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_clusters);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100594 break;
595 case TIPC_CMD_GET_MAX_NODES:
Per Liden4323add2006-01-18 00:38:21 +0100596 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_nodes);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100597 break;
598 case TIPC_CMD_GET_MAX_SLAVES:
Per Liden4323add2006-01-18 00:38:21 +0100599 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_slaves);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100600 break;
601 case TIPC_CMD_GET_NETID:
Per Liden4323add2006-01-18 00:38:21 +0100602 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100603 break;
Allan Stephens59f0c452008-05-21 14:52:30 -0700604 case TIPC_CMD_NOT_NET_ADMIN:
605 rep_tlv_buf =
606 tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
607 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100608 default:
Allan Stephens53cfd1e2006-10-16 22:00:56 -0700609 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
610 " (unknown command)");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100611 break;
612 }
613
614 /* Return reply buffer */
615exit:
616 spin_unlock_bh(&config_lock);
617 return rep_tlv_buf;
618}
619
620static void cfg_named_msg_event(void *userdata,
621 u32 port_ref,
622 struct sk_buff **buf,
623 const unchar *msg,
624 u32 size,
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900625 u32 importance,
Per Lidenb97bf3f2006-01-02 19:04:38 +0100626 struct tipc_portid const *orig,
627 struct tipc_name_seq const *dest)
628{
629 struct tipc_cfg_msg_hdr *req_hdr;
630 struct tipc_cfg_msg_hdr *rep_hdr;
631 struct sk_buff *rep_buf;
632
633 /* Validate configuration message header (ignore invalid message) */
634
635 req_hdr = (struct tipc_cfg_msg_hdr *)msg;
636 if ((size < sizeof(*req_hdr)) ||
637 (size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) ||
638 (ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) {
Allan Stephensa10bd922006-06-25 23:52:17 -0700639 warn("Invalid configuration message discarded\n");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100640 return;
641 }
642
643 /* Generate reply for request (if can't, return request) */
644
Per Liden4323add2006-01-18 00:38:21 +0100645 rep_buf = tipc_cfg_do_cmd(orig->node,
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900646 ntohs(req_hdr->tcm_type),
Per Liden4323add2006-01-18 00:38:21 +0100647 msg + sizeof(*req_hdr),
648 size - sizeof(*req_hdr),
649 BUF_HEADROOM + MAX_H_SIZE + sizeof(*rep_hdr));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100650 if (rep_buf) {
651 skb_push(rep_buf, sizeof(*rep_hdr));
652 rep_hdr = (struct tipc_cfg_msg_hdr *)rep_buf->data;
653 memcpy(rep_hdr, req_hdr, sizeof(*rep_hdr));
654 rep_hdr->tcm_len = htonl(rep_buf->len);
655 rep_hdr->tcm_flags &= htons(~TCM_F_REQUEST);
656 } else {
657 rep_buf = *buf;
658 *buf = NULL;
659 }
660
661 /* NEED TO ADD CODE TO HANDLE FAILED SEND (SUCH AS CONGESTION) */
662 tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len);
663}
664
Per Liden4323add2006-01-18 00:38:21 +0100665int tipc_cfg_init(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100666{
667 struct tipc_name_seq seq;
668 int res;
669
670 memset(&mng, 0, sizeof(mng));
671 INIT_LIST_HEAD(&mng.link_subscribers);
672
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800673 res = tipc_attach(&mng.user_ref, NULL, NULL);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100674 if (res)
675 goto failed;
676
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800677 res = tipc_createport(mng.user_ref, NULL, TIPC_CRITICAL_IMPORTANCE,
Per Lidenb97bf3f2006-01-02 19:04:38 +0100678 NULL, NULL, NULL,
679 NULL, cfg_named_msg_event, NULL,
680 NULL, &mng.port_ref);
681 if (res)
682 goto failed;
683
684 seq.type = TIPC_CFG_SRV;
685 seq.lower = seq.upper = tipc_own_addr;
Per Liden4323add2006-01-18 00:38:21 +0100686 res = tipc_nametbl_publish_rsv(mng.port_ref, TIPC_ZONE_SCOPE, &seq);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100687 if (res)
688 goto failed;
689
690 return 0;
691
692failed:
693 err("Unable to create configuration service\n");
694 tipc_detach(mng.user_ref);
695 mng.user_ref = 0;
696 return res;
697}
698
Per Liden4323add2006-01-18 00:38:21 +0100699void tipc_cfg_stop(void)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100700{
701 if (mng.user_ref) {
702 tipc_detach(mng.user_ref);
703 mng.user_ref = 0;
704 }
705}