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 |
b97bf3fd | 5 | * Copyright (c) 2004-2005, 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; | |
110 | u32 value_net; | |
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; | |
211 | sub = (struct subscr_data *)kmalloc(sizeof(*sub), | |
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 PL |
286 | |
287 | addr = *(u32 *)TLV_DATA(req_tlv_area); | |
288 | addr = ntohl(addr); | |
289 | if (addr == tipc_own_addr) | |
4323add6 PL |
290 | return tipc_cfg_reply_none(); |
291 | if (!tipc_addr_node_valid(addr)) | |
292 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
293 | " (node address)"); | |
e100ae92 | 294 | if (tipc_mode == TIPC_NET_MODE) |
4323add6 PL |
295 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
296 | " (cannot change node address once assigned)"); | |
e100ae92 AS |
297 | tipc_own_addr = addr; |
298 | ||
299 | /* | |
300 | * Must release all spinlocks before calling start_net() because | |
301 | * Linux version of TIPC calls eth_media_start() which calls | |
302 | * register_netdevice_notifier() which may block! | |
303 | * | |
304 | * Temporarily releasing the lock should be harmless for non-Linux TIPC, | |
305 | * but Linux version of eth_media_start() should really be reworked | |
306 | * so that it can be called with spinlocks held. | |
307 | */ | |
b97bf3fd PL |
308 | |
309 | spin_unlock_bh(&config_lock); | |
4323add6 | 310 | tipc_core_start_net(); |
b97bf3fd | 311 | spin_lock_bh(&config_lock); |
4323add6 | 312 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
313 | } |
314 | ||
315 | static struct sk_buff *cfg_set_remote_mng(void) | |
316 | { | |
317 | u32 value; | |
318 | ||
319 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 320 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
321 | |
322 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
323 | value = ntohl(value); | |
324 | tipc_remote_management = (value != 0); | |
4323add6 | 325 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
326 | } |
327 | ||
328 | static struct sk_buff *cfg_set_max_publications(void) | |
329 | { | |
330 | u32 value; | |
331 | ||
332 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 333 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
334 | |
335 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
336 | value = ntohl(value); | |
337 | if (value != delimit(value, 1, 65535)) | |
4323add6 PL |
338 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
339 | " (max publications must be 1-65535)"); | |
b97bf3fd | 340 | tipc_max_publications = value; |
4323add6 | 341 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
342 | } |
343 | ||
344 | static struct sk_buff *cfg_set_max_subscriptions(void) | |
345 | { | |
346 | u32 value; | |
347 | ||
348 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 349 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
350 | |
351 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
352 | value = ntohl(value); | |
353 | if (value != delimit(value, 1, 65535)) | |
4323add6 PL |
354 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
355 | " (max subscriptions must be 1-65535"); | |
b97bf3fd | 356 | tipc_max_subscriptions = value; |
4323add6 | 357 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
358 | } |
359 | ||
360 | static struct sk_buff *cfg_set_max_ports(void) | |
361 | { | |
b97bf3fd PL |
362 | u32 value; |
363 | ||
364 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 365 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
366 | value = *(u32 *)TLV_DATA(req_tlv_area); |
367 | value = ntohl(value); | |
e100ae92 AS |
368 | if (value == tipc_max_ports) |
369 | return tipc_cfg_reply_none(); | |
b97bf3fd | 370 | if (value != delimit(value, 127, 65535)) |
4323add6 PL |
371 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
372 | " (max ports must be 127-65535)"); | |
e100ae92 | 373 | if (tipc_mode != TIPC_NOT_RUNNING) |
4323add6 | 374 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
e100ae92 | 375 | " (cannot change max ports while TIPC is active)"); |
b97bf3fd | 376 | tipc_max_ports = value; |
4323add6 | 377 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
378 | } |
379 | ||
380 | static struct sk_buff *cfg_set_max_zones(void) | |
381 | { | |
382 | u32 value; | |
383 | ||
384 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 385 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
386 | value = *(u32 *)TLV_DATA(req_tlv_area); |
387 | value = ntohl(value); | |
e100ae92 AS |
388 | if (value == tipc_max_zones) |
389 | return tipc_cfg_reply_none(); | |
b97bf3fd | 390 | if (value != delimit(value, 1, 255)) |
4323add6 PL |
391 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
392 | " (max zones must be 1-255)"); | |
e100ae92 AS |
393 | if (tipc_mode == TIPC_NET_MODE) |
394 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
395 | " (cannot change max zones once TIPC has joined a network)"); | |
396 | tipc_max_zones = value; | |
397 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
398 | } |
399 | ||
400 | static struct sk_buff *cfg_set_max_clusters(void) | |
401 | { | |
402 | u32 value; | |
403 | ||
404 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 405 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
406 | value = *(u32 *)TLV_DATA(req_tlv_area); |
407 | value = ntohl(value); | |
e100ae92 AS |
408 | if (value != delimit(value, 1, 1)) |
409 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
4323add6 PL |
410 | " (max clusters fixed at 1)"); |
411 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
412 | } |
413 | ||
414 | static struct sk_buff *cfg_set_max_nodes(void) | |
415 | { | |
416 | u32 value; | |
417 | ||
418 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 419 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
420 | value = *(u32 *)TLV_DATA(req_tlv_area); |
421 | value = ntohl(value); | |
e100ae92 AS |
422 | if (value == tipc_max_nodes) |
423 | return tipc_cfg_reply_none(); | |
b97bf3fd | 424 | if (value != delimit(value, 8, 2047)) |
4323add6 PL |
425 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
426 | " (max nodes must be 8-2047)"); | |
e100ae92 AS |
427 | if (tipc_mode == TIPC_NET_MODE) |
428 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
429 | " (cannot change max nodes once TIPC has joined a network)"); | |
430 | tipc_max_nodes = value; | |
431 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
432 | } |
433 | ||
434 | static struct sk_buff *cfg_set_max_slaves(void) | |
435 | { | |
436 | u32 value; | |
437 | ||
438 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 439 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
440 | value = *(u32 *)TLV_DATA(req_tlv_area); |
441 | value = ntohl(value); | |
442 | if (value != 0) | |
4323add6 PL |
443 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
444 | " (max secondary nodes fixed at 0)"); | |
445 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
446 | } |
447 | ||
448 | static struct sk_buff *cfg_set_netid(void) | |
449 | { | |
450 | u32 value; | |
451 | ||
452 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 453 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
454 | value = *(u32 *)TLV_DATA(req_tlv_area); |
455 | value = ntohl(value); | |
e100ae92 AS |
456 | if (value == tipc_net_id) |
457 | return tipc_cfg_reply_none(); | |
b97bf3fd | 458 | if (value != delimit(value, 1, 9999)) |
4323add6 PL |
459 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
460 | " (network id must be 1-9999)"); | |
e100ae92 | 461 | if (tipc_mode == TIPC_NET_MODE) |
4323add6 | 462 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
e100ae92 AS |
463 | " (cannot change network id once TIPC has joined a network)"); |
464 | tipc_net_id = value; | |
465 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
466 | } |
467 | ||
4323add6 PL |
468 | struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area, |
469 | int request_space, int reply_headroom) | |
b97bf3fd PL |
470 | { |
471 | struct sk_buff *rep_tlv_buf; | |
472 | ||
473 | spin_lock_bh(&config_lock); | |
474 | ||
475 | /* Save request and reply details in a well-known location */ | |
476 | ||
477 | req_tlv_area = request_area; | |
478 | req_tlv_space = request_space; | |
479 | rep_headroom = reply_headroom; | |
480 | ||
481 | /* Check command authorization */ | |
482 | ||
483 | if (likely(orig_node == tipc_own_addr)) { | |
484 | /* command is permitted */ | |
485 | } else if (cmd >= 0x8000) { | |
4323add6 PL |
486 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
487 | " (cannot be done remotely)"); | |
b97bf3fd PL |
488 | goto exit; |
489 | } else if (!tipc_remote_management) { | |
4323add6 | 490 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NO_REMOTE); |
b97bf3fd PL |
491 | goto exit; |
492 | } | |
493 | else if (cmd >= 0x4000) { | |
494 | u32 domain = 0; | |
495 | ||
4323add6 | 496 | if ((tipc_nametbl_translate(TIPC_ZM_SRV, 0, &domain) == 0) || |
b97bf3fd | 497 | (domain != orig_node)) { |
4323add6 | 498 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_ZONE_MSTR); |
b97bf3fd PL |
499 | goto exit; |
500 | } | |
501 | } | |
502 | ||
503 | /* Call appropriate processing routine */ | |
504 | ||
505 | switch (cmd) { | |
506 | case TIPC_CMD_NOOP: | |
4323add6 | 507 | rep_tlv_buf = tipc_cfg_reply_none(); |
b97bf3fd PL |
508 | break; |
509 | case TIPC_CMD_GET_NODES: | |
4323add6 | 510 | rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
511 | break; |
512 | case TIPC_CMD_GET_LINKS: | |
4323add6 | 513 | rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
514 | break; |
515 | case TIPC_CMD_SHOW_LINK_STATS: | |
4323add6 | 516 | rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
517 | break; |
518 | case TIPC_CMD_RESET_LINK_STATS: | |
4323add6 | 519 | rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
520 | break; |
521 | case TIPC_CMD_SHOW_NAME_TABLE: | |
4323add6 | 522 | rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
523 | break; |
524 | case TIPC_CMD_GET_BEARER_NAMES: | |
4323add6 | 525 | rep_tlv_buf = tipc_bearer_get_names(); |
b97bf3fd PL |
526 | break; |
527 | case TIPC_CMD_GET_MEDIA_NAMES: | |
4323add6 | 528 | rep_tlv_buf = tipc_media_get_names(); |
b97bf3fd PL |
529 | break; |
530 | case TIPC_CMD_SHOW_PORTS: | |
4323add6 | 531 | rep_tlv_buf = tipc_port_get_ports(); |
b97bf3fd PL |
532 | break; |
533 | #if 0 | |
534 | case TIPC_CMD_SHOW_PORT_STATS: | |
535 | rep_tlv_buf = port_show_stats(req_tlv_area, req_tlv_space); | |
536 | break; | |
537 | case TIPC_CMD_RESET_PORT_STATS: | |
4323add6 | 538 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED); |
b97bf3fd PL |
539 | break; |
540 | #endif | |
541 | case TIPC_CMD_SET_LOG_SIZE: | |
4323add6 | 542 | rep_tlv_buf = tipc_log_resize(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
543 | break; |
544 | case TIPC_CMD_DUMP_LOG: | |
4323add6 | 545 | rep_tlv_buf = tipc_log_dump(); |
b97bf3fd PL |
546 | break; |
547 | case TIPC_CMD_SET_LINK_TOL: | |
548 | case TIPC_CMD_SET_LINK_PRI: | |
549 | case TIPC_CMD_SET_LINK_WINDOW: | |
4323add6 | 550 | rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd); |
b97bf3fd PL |
551 | break; |
552 | case TIPC_CMD_ENABLE_BEARER: | |
553 | rep_tlv_buf = cfg_enable_bearer(); | |
554 | break; | |
555 | case TIPC_CMD_DISABLE_BEARER: | |
556 | rep_tlv_buf = cfg_disable_bearer(); | |
557 | break; | |
558 | case TIPC_CMD_SET_NODE_ADDR: | |
559 | rep_tlv_buf = cfg_set_own_addr(); | |
560 | break; | |
561 | case TIPC_CMD_SET_REMOTE_MNG: | |
562 | rep_tlv_buf = cfg_set_remote_mng(); | |
563 | break; | |
564 | case TIPC_CMD_SET_MAX_PORTS: | |
565 | rep_tlv_buf = cfg_set_max_ports(); | |
566 | break; | |
567 | case TIPC_CMD_SET_MAX_PUBL: | |
568 | rep_tlv_buf = cfg_set_max_publications(); | |
569 | break; | |
570 | case TIPC_CMD_SET_MAX_SUBSCR: | |
571 | rep_tlv_buf = cfg_set_max_subscriptions(); | |
572 | break; | |
573 | case TIPC_CMD_SET_MAX_ZONES: | |
574 | rep_tlv_buf = cfg_set_max_zones(); | |
575 | break; | |
576 | case TIPC_CMD_SET_MAX_CLUSTERS: | |
577 | rep_tlv_buf = cfg_set_max_clusters(); | |
578 | break; | |
579 | case TIPC_CMD_SET_MAX_NODES: | |
580 | rep_tlv_buf = cfg_set_max_nodes(); | |
581 | break; | |
582 | case TIPC_CMD_SET_MAX_SLAVES: | |
583 | rep_tlv_buf = cfg_set_max_slaves(); | |
584 | break; | |
585 | case TIPC_CMD_SET_NETID: | |
586 | rep_tlv_buf = cfg_set_netid(); | |
587 | break; | |
588 | case TIPC_CMD_GET_REMOTE_MNG: | |
4323add6 | 589 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_remote_management); |
b97bf3fd PL |
590 | break; |
591 | case TIPC_CMD_GET_MAX_PORTS: | |
4323add6 | 592 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports); |
b97bf3fd PL |
593 | break; |
594 | case TIPC_CMD_GET_MAX_PUBL: | |
4323add6 | 595 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_publications); |
b97bf3fd PL |
596 | break; |
597 | case TIPC_CMD_GET_MAX_SUBSCR: | |
4323add6 | 598 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_subscriptions); |
b97bf3fd PL |
599 | break; |
600 | case TIPC_CMD_GET_MAX_ZONES: | |
4323add6 | 601 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_zones); |
b97bf3fd PL |
602 | break; |
603 | case TIPC_CMD_GET_MAX_CLUSTERS: | |
4323add6 | 604 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_clusters); |
b97bf3fd PL |
605 | break; |
606 | case TIPC_CMD_GET_MAX_NODES: | |
4323add6 | 607 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_nodes); |
b97bf3fd PL |
608 | break; |
609 | case TIPC_CMD_GET_MAX_SLAVES: | |
4323add6 | 610 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_slaves); |
b97bf3fd PL |
611 | break; |
612 | case TIPC_CMD_GET_NETID: | |
4323add6 | 613 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id); |
b97bf3fd PL |
614 | break; |
615 | default: | |
616 | rep_tlv_buf = NULL; | |
617 | break; | |
618 | } | |
619 | ||
620 | /* Return reply buffer */ | |
621 | exit: | |
622 | spin_unlock_bh(&config_lock); | |
623 | return rep_tlv_buf; | |
624 | } | |
625 | ||
626 | static void cfg_named_msg_event(void *userdata, | |
627 | u32 port_ref, | |
628 | struct sk_buff **buf, | |
629 | const unchar *msg, | |
630 | u32 size, | |
631 | u32 importance, | |
632 | struct tipc_portid const *orig, | |
633 | struct tipc_name_seq const *dest) | |
634 | { | |
635 | struct tipc_cfg_msg_hdr *req_hdr; | |
636 | struct tipc_cfg_msg_hdr *rep_hdr; | |
637 | struct sk_buff *rep_buf; | |
638 | ||
639 | /* Validate configuration message header (ignore invalid message) */ | |
640 | ||
641 | req_hdr = (struct tipc_cfg_msg_hdr *)msg; | |
642 | if ((size < sizeof(*req_hdr)) || | |
643 | (size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) || | |
644 | (ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) { | |
a10bd924 | 645 | warn("Invalid configuration message discarded\n"); |
b97bf3fd PL |
646 | return; |
647 | } | |
648 | ||
649 | /* Generate reply for request (if can't, return request) */ | |
650 | ||
4323add6 PL |
651 | rep_buf = tipc_cfg_do_cmd(orig->node, |
652 | ntohs(req_hdr->tcm_type), | |
653 | msg + sizeof(*req_hdr), | |
654 | size - sizeof(*req_hdr), | |
655 | BUF_HEADROOM + MAX_H_SIZE + sizeof(*rep_hdr)); | |
b97bf3fd PL |
656 | if (rep_buf) { |
657 | skb_push(rep_buf, sizeof(*rep_hdr)); | |
658 | rep_hdr = (struct tipc_cfg_msg_hdr *)rep_buf->data; | |
659 | memcpy(rep_hdr, req_hdr, sizeof(*rep_hdr)); | |
660 | rep_hdr->tcm_len = htonl(rep_buf->len); | |
661 | rep_hdr->tcm_flags &= htons(~TCM_F_REQUEST); | |
662 | } else { | |
663 | rep_buf = *buf; | |
664 | *buf = NULL; | |
665 | } | |
666 | ||
667 | /* NEED TO ADD CODE TO HANDLE FAILED SEND (SUCH AS CONGESTION) */ | |
668 | tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len); | |
669 | } | |
670 | ||
4323add6 | 671 | int tipc_cfg_init(void) |
b97bf3fd PL |
672 | { |
673 | struct tipc_name_seq seq; | |
674 | int res; | |
675 | ||
676 | memset(&mng, 0, sizeof(mng)); | |
677 | INIT_LIST_HEAD(&mng.link_subscribers); | |
678 | ||
1fc54d8f | 679 | res = tipc_attach(&mng.user_ref, NULL, NULL); |
b97bf3fd PL |
680 | if (res) |
681 | goto failed; | |
682 | ||
1fc54d8f | 683 | res = tipc_createport(mng.user_ref, NULL, TIPC_CRITICAL_IMPORTANCE, |
b97bf3fd PL |
684 | NULL, NULL, NULL, |
685 | NULL, cfg_named_msg_event, NULL, | |
686 | NULL, &mng.port_ref); | |
687 | if (res) | |
688 | goto failed; | |
689 | ||
690 | seq.type = TIPC_CFG_SRV; | |
691 | seq.lower = seq.upper = tipc_own_addr; | |
4323add6 | 692 | res = tipc_nametbl_publish_rsv(mng.port_ref, TIPC_ZONE_SCOPE, &seq); |
b97bf3fd PL |
693 | if (res) |
694 | goto failed; | |
695 | ||
696 | return 0; | |
697 | ||
698 | failed: | |
699 | err("Unable to create configuration service\n"); | |
700 | tipc_detach(mng.user_ref); | |
701 | mng.user_ref = 0; | |
702 | return res; | |
703 | } | |
704 | ||
4323add6 | 705 | void tipc_cfg_stop(void) |
b97bf3fd PL |
706 | { |
707 | if (mng.user_ref) { | |
708 | tipc_detach(mng.user_ref); | |
709 | mng.user_ref = 0; | |
710 | } | |
711 | } |