Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/config.c: TIPC configuration management code | |
3 | * | |
593a5f22 | 4 | * Copyright (c) 2002-2006, Ericsson AB |
53cfd1e1 | 5 | * Copyright (c) 2004-2006, 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" | |
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 | ||
49 | struct subscr_data { | |
50 | char usr_handle[8]; | |
51 | u32 domain; | |
52 | u32 port_ref; | |
53 | struct list_head subd_list; | |
54 | }; | |
55 | ||
56 | struct 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 | ||
64 | static struct manager mng = { 0}; | |
65 | ||
34af946a | 66 | static DEFINE_SPINLOCK(config_lock); |
b97bf3fd PL |
67 | |
68 | static const void *req_tlv_area; /* request message TLV area */ | |
69 | static int req_tlv_space; /* request message TLV area size */ | |
70 | static int rep_headroom; /* reply message headroom to use */ | |
71 | ||
72 | ||
4323add6 | 73 | void tipc_cfg_link_event(u32 addr, char *name, int up) |
b97bf3fd PL |
74 | { |
75 | /* TIPC DOESN'T HANDLE LINK EVENT SUBSCRIPTIONS AT THE MOMENT */ | |
76 | } | |
77 | ||
78 | ||
4323add6 | 79 | struct sk_buff *tipc_cfg_reply_alloc(int payload_size) |
b97bf3fd PL |
80 | { |
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 | ||
4323add6 PL |
89 | int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type, |
90 | void *tlv_data, int tlv_data_size) | |
b97bf3fd PL |
91 | { |
92 | struct tlv_desc *tlv = (struct tlv_desc *)buf->tail; | |
93 | int new_tlv_space = TLV_SPACE(tlv_data_size); | |
94 | ||
95 | if (skb_tailroom(buf) < new_tlv_space) { | |
4323add6 | 96 | dbg("tipc_cfg_append_tlv unable to append TLV\n"); |
b97bf3fd PL |
97 | 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 | ||
4323add6 | 107 | struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value) |
b97bf3fd PL |
108 | { |
109 | struct sk_buff *buf; | |
3e6c8cd5 | 110 | __be32 value_net; |
b97bf3fd | 111 | |
4323add6 | 112 | buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value))); |
b97bf3fd PL |
113 | if (buf) { |
114 | value_net = htonl(value); | |
4323add6 PL |
115 | tipc_cfg_append_tlv(buf, tlv_type, &value_net, |
116 | sizeof(value_net)); | |
b97bf3fd PL |
117 | } |
118 | return buf; | |
119 | } | |
120 | ||
4323add6 | 121 | struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string) |
b97bf3fd PL |
122 | { |
123 | struct sk_buff *buf; | |
124 | int string_len = strlen(string) + 1; | |
125 | ||
4323add6 | 126 | buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len)); |
b97bf3fd | 127 | if (buf) |
4323add6 | 128 | tipc_cfg_append_tlv(buf, tlv_type, string, string_len); |
b97bf3fd PL |
129 | 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 | ||
139 | int 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 | ||
183 | static void cfg_cmd_event(struct tipc_cmd_msg *msg, | |
184 | char *data, | |
185 | u32 sz, | |
186 | 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 | ||
195 | cfg_prepare_res_msg(msg->cmd, msg->usr_handle, rv, &rmsg, msg_sect, | |
196 | 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; | |
5cbded58 | 211 | sub = kmalloc(sizeof(*sub), |
b97bf3fd PL |
212 | 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); | |
4323add6 | 249 | tipc_cfg_respond(msg_sect, 2u, orig); |
b97bf3fd PL |
250 | } |
251 | #endif | |
252 | ||
253 | static 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)) | |
4323add6 | 258 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
259 | |
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))) | |
4323add6 | 264 | return tipc_cfg_reply_error_string("unable to enable bearer"); |
b97bf3fd | 265 | |
4323add6 | 266 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
267 | } |
268 | ||
269 | static struct sk_buff *cfg_disable_bearer(void) | |
270 | { | |
271 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME)) | |
4323add6 | 272 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
273 | |
274 | if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area))) | |
4323add6 | 275 | return tipc_cfg_reply_error_string("unable to disable bearer"); |
b97bf3fd | 276 | |
4323add6 | 277 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
278 | } |
279 | ||
280 | static 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)) | |
4323add6 | 285 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd | 286 | |
3e6c8cd5 | 287 | addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 288 | if (addr == tipc_own_addr) |
4323add6 PL |
289 | 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)"); | |
e100ae92 | 293 | if (tipc_mode == TIPC_NET_MODE) |
4323add6 PL |
294 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
295 | " (cannot change node address once assigned)"); | |
e100ae92 AS |
296 | tipc_own_addr = addr; |
297 | ||
298 | /* | |
299 | * Must release all spinlocks before calling start_net() because | |
300 | * Linux version of TIPC calls eth_media_start() which calls | |
301 | * register_netdevice_notifier() which may block! | |
302 | * | |
303 | * Temporarily releasing the lock should be harmless for non-Linux TIPC, | |
304 | * but Linux version of eth_media_start() should really be reworked | |
305 | * so that it can be called with spinlocks held. | |
306 | */ | |
b97bf3fd PL |
307 | |
308 | spin_unlock_bh(&config_lock); | |
4323add6 | 309 | tipc_core_start_net(); |
b97bf3fd | 310 | spin_lock_bh(&config_lock); |
4323add6 | 311 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
312 | } |
313 | ||
314 | static struct sk_buff *cfg_set_remote_mng(void) | |
315 | { | |
316 | u32 value; | |
317 | ||
318 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 319 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd | 320 | |
3e6c8cd5 | 321 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 322 | tipc_remote_management = (value != 0); |
4323add6 | 323 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
324 | } |
325 | ||
326 | static struct sk_buff *cfg_set_max_publications(void) | |
327 | { | |
328 | u32 value; | |
329 | ||
330 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 331 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd | 332 | |
3e6c8cd5 | 333 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 334 | if (value != delimit(value, 1, 65535)) |
4323add6 PL |
335 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
336 | " (max publications must be 1-65535)"); | |
b97bf3fd | 337 | tipc_max_publications = value; |
4323add6 | 338 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
339 | } |
340 | ||
341 | static struct sk_buff *cfg_set_max_subscriptions(void) | |
342 | { | |
343 | u32 value; | |
344 | ||
345 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 346 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd | 347 | |
3e6c8cd5 | 348 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 349 | if (value != delimit(value, 1, 65535)) |
4323add6 PL |
350 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
351 | " (max subscriptions must be 1-65535"); | |
b97bf3fd | 352 | tipc_max_subscriptions = value; |
4323add6 | 353 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
354 | } |
355 | ||
356 | static struct sk_buff *cfg_set_max_ports(void) | |
357 | { | |
b97bf3fd PL |
358 | u32 value; |
359 | ||
360 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 361 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 362 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
363 | if (value == tipc_max_ports) |
364 | return tipc_cfg_reply_none(); | |
b97bf3fd | 365 | if (value != delimit(value, 127, 65535)) |
4323add6 PL |
366 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
367 | " (max ports must be 127-65535)"); | |
e100ae92 | 368 | if (tipc_mode != TIPC_NOT_RUNNING) |
4323add6 | 369 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
e100ae92 | 370 | " (cannot change max ports while TIPC is active)"); |
b97bf3fd | 371 | tipc_max_ports = value; |
4323add6 | 372 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
373 | } |
374 | ||
375 | static struct sk_buff *cfg_set_max_zones(void) | |
376 | { | |
377 | u32 value; | |
378 | ||
379 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 380 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 381 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
382 | if (value == tipc_max_zones) |
383 | return tipc_cfg_reply_none(); | |
b97bf3fd | 384 | if (value != delimit(value, 1, 255)) |
4323add6 PL |
385 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
386 | " (max zones must be 1-255)"); | |
e100ae92 AS |
387 | if (tipc_mode == TIPC_NET_MODE) |
388 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
389 | " (cannot change max zones once TIPC has joined a network)"); | |
390 | tipc_max_zones = value; | |
391 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
392 | } |
393 | ||
394 | static struct sk_buff *cfg_set_max_clusters(void) | |
395 | { | |
396 | u32 value; | |
397 | ||
398 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 399 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 400 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
401 | if (value != delimit(value, 1, 1)) |
402 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
4323add6 PL |
403 | " (max clusters fixed at 1)"); |
404 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
405 | } |
406 | ||
407 | static struct sk_buff *cfg_set_max_nodes(void) | |
408 | { | |
409 | u32 value; | |
410 | ||
411 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 412 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 413 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
414 | if (value == tipc_max_nodes) |
415 | return tipc_cfg_reply_none(); | |
b97bf3fd | 416 | if (value != delimit(value, 8, 2047)) |
4323add6 PL |
417 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
418 | " (max nodes must be 8-2047)"); | |
e100ae92 AS |
419 | if (tipc_mode == TIPC_NET_MODE) |
420 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
421 | " (cannot change max nodes once TIPC has joined a network)"); | |
422 | tipc_max_nodes = value; | |
423 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
424 | } |
425 | ||
426 | static struct sk_buff *cfg_set_max_slaves(void) | |
427 | { | |
428 | u32 value; | |
429 | ||
430 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 431 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 432 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 433 | if (value != 0) |
4323add6 PL |
434 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
435 | " (max secondary nodes fixed at 0)"); | |
436 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
437 | } |
438 | ||
439 | static struct sk_buff *cfg_set_netid(void) | |
440 | { | |
441 | u32 value; | |
442 | ||
443 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 444 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 445 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
446 | if (value == tipc_net_id) |
447 | return tipc_cfg_reply_none(); | |
b97bf3fd | 448 | if (value != delimit(value, 1, 9999)) |
4323add6 PL |
449 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
450 | " (network id must be 1-9999)"); | |
e100ae92 | 451 | if (tipc_mode == TIPC_NET_MODE) |
4323add6 | 452 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
e100ae92 AS |
453 | " (cannot change network id once TIPC has joined a network)"); |
454 | tipc_net_id = value; | |
455 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
456 | } |
457 | ||
4323add6 PL |
458 | struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area, |
459 | int request_space, int reply_headroom) | |
b97bf3fd PL |
460 | { |
461 | struct sk_buff *rep_tlv_buf; | |
462 | ||
463 | spin_lock_bh(&config_lock); | |
464 | ||
465 | /* Save request and reply details in a well-known location */ | |
466 | ||
467 | req_tlv_area = request_area; | |
468 | req_tlv_space = request_space; | |
469 | rep_headroom = reply_headroom; | |
470 | ||
471 | /* Check command authorization */ | |
472 | ||
473 | if (likely(orig_node == tipc_own_addr)) { | |
474 | /* command is permitted */ | |
475 | } else if (cmd >= 0x8000) { | |
4323add6 PL |
476 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
477 | " (cannot be done remotely)"); | |
b97bf3fd PL |
478 | goto exit; |
479 | } else if (!tipc_remote_management) { | |
4323add6 | 480 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NO_REMOTE); |
b97bf3fd PL |
481 | goto exit; |
482 | } | |
483 | else if (cmd >= 0x4000) { | |
484 | u32 domain = 0; | |
485 | ||
4323add6 | 486 | if ((tipc_nametbl_translate(TIPC_ZM_SRV, 0, &domain) == 0) || |
b97bf3fd | 487 | (domain != orig_node)) { |
4323add6 | 488 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_ZONE_MSTR); |
b97bf3fd PL |
489 | goto exit; |
490 | } | |
491 | } | |
492 | ||
493 | /* Call appropriate processing routine */ | |
494 | ||
495 | switch (cmd) { | |
496 | case TIPC_CMD_NOOP: | |
4323add6 | 497 | rep_tlv_buf = tipc_cfg_reply_none(); |
b97bf3fd PL |
498 | break; |
499 | case TIPC_CMD_GET_NODES: | |
4323add6 | 500 | rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
501 | break; |
502 | case TIPC_CMD_GET_LINKS: | |
4323add6 | 503 | rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
504 | break; |
505 | case TIPC_CMD_SHOW_LINK_STATS: | |
4323add6 | 506 | rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
507 | break; |
508 | case TIPC_CMD_RESET_LINK_STATS: | |
4323add6 | 509 | rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
510 | break; |
511 | case TIPC_CMD_SHOW_NAME_TABLE: | |
4323add6 | 512 | rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
513 | break; |
514 | case TIPC_CMD_GET_BEARER_NAMES: | |
4323add6 | 515 | rep_tlv_buf = tipc_bearer_get_names(); |
b97bf3fd PL |
516 | break; |
517 | case TIPC_CMD_GET_MEDIA_NAMES: | |
4323add6 | 518 | rep_tlv_buf = tipc_media_get_names(); |
b97bf3fd PL |
519 | break; |
520 | case TIPC_CMD_SHOW_PORTS: | |
4323add6 | 521 | rep_tlv_buf = tipc_port_get_ports(); |
b97bf3fd PL |
522 | break; |
523 | #if 0 | |
524 | case TIPC_CMD_SHOW_PORT_STATS: | |
525 | rep_tlv_buf = port_show_stats(req_tlv_area, req_tlv_space); | |
526 | break; | |
527 | case TIPC_CMD_RESET_PORT_STATS: | |
4323add6 | 528 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED); |
b97bf3fd PL |
529 | break; |
530 | #endif | |
531 | case TIPC_CMD_SET_LOG_SIZE: | |
4323add6 | 532 | rep_tlv_buf = tipc_log_resize(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
533 | break; |
534 | case TIPC_CMD_DUMP_LOG: | |
4323add6 | 535 | rep_tlv_buf = tipc_log_dump(); |
b97bf3fd PL |
536 | break; |
537 | case TIPC_CMD_SET_LINK_TOL: | |
538 | case TIPC_CMD_SET_LINK_PRI: | |
539 | case TIPC_CMD_SET_LINK_WINDOW: | |
4323add6 | 540 | rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd); |
b97bf3fd PL |
541 | break; |
542 | case TIPC_CMD_ENABLE_BEARER: | |
543 | rep_tlv_buf = cfg_enable_bearer(); | |
544 | break; | |
545 | case TIPC_CMD_DISABLE_BEARER: | |
546 | rep_tlv_buf = cfg_disable_bearer(); | |
547 | break; | |
548 | case TIPC_CMD_SET_NODE_ADDR: | |
549 | rep_tlv_buf = cfg_set_own_addr(); | |
550 | break; | |
551 | case TIPC_CMD_SET_REMOTE_MNG: | |
552 | rep_tlv_buf = cfg_set_remote_mng(); | |
553 | break; | |
554 | case TIPC_CMD_SET_MAX_PORTS: | |
555 | rep_tlv_buf = cfg_set_max_ports(); | |
556 | break; | |
557 | case TIPC_CMD_SET_MAX_PUBL: | |
558 | rep_tlv_buf = cfg_set_max_publications(); | |
559 | break; | |
560 | case TIPC_CMD_SET_MAX_SUBSCR: | |
561 | rep_tlv_buf = cfg_set_max_subscriptions(); | |
562 | break; | |
563 | case TIPC_CMD_SET_MAX_ZONES: | |
564 | rep_tlv_buf = cfg_set_max_zones(); | |
565 | break; | |
566 | case TIPC_CMD_SET_MAX_CLUSTERS: | |
567 | rep_tlv_buf = cfg_set_max_clusters(); | |
568 | break; | |
569 | case TIPC_CMD_SET_MAX_NODES: | |
570 | rep_tlv_buf = cfg_set_max_nodes(); | |
571 | break; | |
572 | case TIPC_CMD_SET_MAX_SLAVES: | |
573 | rep_tlv_buf = cfg_set_max_slaves(); | |
574 | break; | |
575 | case TIPC_CMD_SET_NETID: | |
576 | rep_tlv_buf = cfg_set_netid(); | |
577 | break; | |
578 | case TIPC_CMD_GET_REMOTE_MNG: | |
4323add6 | 579 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_remote_management); |
b97bf3fd PL |
580 | break; |
581 | case TIPC_CMD_GET_MAX_PORTS: | |
4323add6 | 582 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports); |
b97bf3fd PL |
583 | break; |
584 | case TIPC_CMD_GET_MAX_PUBL: | |
4323add6 | 585 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_publications); |
b97bf3fd PL |
586 | break; |
587 | case TIPC_CMD_GET_MAX_SUBSCR: | |
4323add6 | 588 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_subscriptions); |
b97bf3fd PL |
589 | break; |
590 | case TIPC_CMD_GET_MAX_ZONES: | |
4323add6 | 591 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_zones); |
b97bf3fd PL |
592 | break; |
593 | case TIPC_CMD_GET_MAX_CLUSTERS: | |
4323add6 | 594 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_clusters); |
b97bf3fd PL |
595 | break; |
596 | case TIPC_CMD_GET_MAX_NODES: | |
4323add6 | 597 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_nodes); |
b97bf3fd PL |
598 | break; |
599 | case TIPC_CMD_GET_MAX_SLAVES: | |
4323add6 | 600 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_slaves); |
b97bf3fd PL |
601 | break; |
602 | case TIPC_CMD_GET_NETID: | |
4323add6 | 603 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id); |
b97bf3fd PL |
604 | break; |
605 | default: | |
53cfd1e1 AS |
606 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
607 | " (unknown command)"); | |
b97bf3fd PL |
608 | break; |
609 | } | |
610 | ||
611 | /* Return reply buffer */ | |
612 | exit: | |
613 | spin_unlock_bh(&config_lock); | |
614 | return rep_tlv_buf; | |
615 | } | |
616 | ||
617 | static void cfg_named_msg_event(void *userdata, | |
618 | u32 port_ref, | |
619 | struct sk_buff **buf, | |
620 | const unchar *msg, | |
621 | u32 size, | |
622 | u32 importance, | |
623 | struct tipc_portid const *orig, | |
624 | struct tipc_name_seq const *dest) | |
625 | { | |
626 | struct tipc_cfg_msg_hdr *req_hdr; | |
627 | struct tipc_cfg_msg_hdr *rep_hdr; | |
628 | struct sk_buff *rep_buf; | |
629 | ||
630 | /* Validate configuration message header (ignore invalid message) */ | |
631 | ||
632 | req_hdr = (struct tipc_cfg_msg_hdr *)msg; | |
633 | if ((size < sizeof(*req_hdr)) || | |
634 | (size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) || | |
635 | (ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) { | |
a10bd924 | 636 | warn("Invalid configuration message discarded\n"); |
b97bf3fd PL |
637 | return; |
638 | } | |
639 | ||
640 | /* Generate reply for request (if can't, return request) */ | |
641 | ||
4323add6 PL |
642 | rep_buf = tipc_cfg_do_cmd(orig->node, |
643 | ntohs(req_hdr->tcm_type), | |
644 | msg + sizeof(*req_hdr), | |
645 | size - sizeof(*req_hdr), | |
646 | BUF_HEADROOM + MAX_H_SIZE + sizeof(*rep_hdr)); | |
b97bf3fd PL |
647 | if (rep_buf) { |
648 | skb_push(rep_buf, sizeof(*rep_hdr)); | |
649 | rep_hdr = (struct tipc_cfg_msg_hdr *)rep_buf->data; | |
650 | memcpy(rep_hdr, req_hdr, sizeof(*rep_hdr)); | |
651 | rep_hdr->tcm_len = htonl(rep_buf->len); | |
652 | rep_hdr->tcm_flags &= htons(~TCM_F_REQUEST); | |
653 | } else { | |
654 | rep_buf = *buf; | |
655 | *buf = NULL; | |
656 | } | |
657 | ||
658 | /* NEED TO ADD CODE TO HANDLE FAILED SEND (SUCH AS CONGESTION) */ | |
659 | tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len); | |
660 | } | |
661 | ||
4323add6 | 662 | int tipc_cfg_init(void) |
b97bf3fd PL |
663 | { |
664 | struct tipc_name_seq seq; | |
665 | int res; | |
666 | ||
667 | memset(&mng, 0, sizeof(mng)); | |
668 | INIT_LIST_HEAD(&mng.link_subscribers); | |
669 | ||
1fc54d8f | 670 | res = tipc_attach(&mng.user_ref, NULL, NULL); |
b97bf3fd PL |
671 | if (res) |
672 | goto failed; | |
673 | ||
1fc54d8f | 674 | res = tipc_createport(mng.user_ref, NULL, TIPC_CRITICAL_IMPORTANCE, |
b97bf3fd PL |
675 | NULL, NULL, NULL, |
676 | NULL, cfg_named_msg_event, NULL, | |
677 | NULL, &mng.port_ref); | |
678 | if (res) | |
679 | goto failed; | |
680 | ||
681 | seq.type = TIPC_CFG_SRV; | |
682 | seq.lower = seq.upper = tipc_own_addr; | |
4323add6 | 683 | res = tipc_nametbl_publish_rsv(mng.port_ref, TIPC_ZONE_SCOPE, &seq); |
b97bf3fd PL |
684 | if (res) |
685 | goto failed; | |
686 | ||
687 | return 0; | |
688 | ||
689 | failed: | |
690 | err("Unable to create configuration service\n"); | |
691 | tipc_detach(mng.user_ref); | |
692 | mng.user_ref = 0; | |
693 | return res; | |
694 | } | |
695 | ||
4323add6 | 696 | void tipc_cfg_stop(void) |
b97bf3fd PL |
697 | { |
698 | if (mng.user_ref) { | |
699 | tipc_detach(mng.user_ref); | |
700 | mng.user_ref = 0; | |
701 | } | |
702 | } |