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b97bf3fd PL |
1 | /* |
2 | * net/tipc/config.c: TIPC configuration management code | |
3 | * | |
4 | * Copyright (c) 2003-2005, Ericsson Research Canada | |
5 | * Copyright (c) 2004-2005, Wind River Systems | |
6 | * Copyright (c) 2005-2006, Ericsson AB | |
7 | * All rights reserved. | |
8 | * | |
9ea1fd3c | 9 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
10 | * modification, are permitted provided that the following conditions are met: |
11 | * | |
9ea1fd3c PL |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the names of the copyright holders nor the names of its | |
18 | * contributors may be used to endorse or promote products derived from | |
19 | * this software without specific prior written permission. | |
b97bf3fd | 20 | * |
9ea1fd3c PL |
21 | * Alternatively, this software may be distributed under the terms of the |
22 | * GNU General Public License ("GPL") version 2 as published by the Free | |
23 | * Software Foundation. | |
24 | * | |
25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
35 | * POSSIBILITY OF SUCH DAMAGE. |
36 | */ | |
37 | ||
38 | #include "core.h" | |
39 | #include "dbg.h" | |
40 | #include "bearer.h" | |
41 | #include "port.h" | |
42 | #include "link.h" | |
43 | #include "zone.h" | |
44 | #include "addr.h" | |
45 | #include "name_table.h" | |
46 | #include "node.h" | |
47 | #include "config.h" | |
48 | #include "discover.h" | |
49 | ||
50 | struct subscr_data { | |
51 | char usr_handle[8]; | |
52 | u32 domain; | |
53 | u32 port_ref; | |
54 | struct list_head subd_list; | |
55 | }; | |
56 | ||
57 | struct manager { | |
58 | u32 user_ref; | |
59 | u32 port_ref; | |
60 | u32 subscr_ref; | |
61 | u32 link_subscriptions; | |
62 | struct list_head link_subscribers; | |
63 | }; | |
64 | ||
65 | static struct manager mng = { 0}; | |
66 | ||
67 | static spinlock_t config_lock = SPIN_LOCK_UNLOCKED; | |
68 | ||
69 | static const void *req_tlv_area; /* request message TLV area */ | |
70 | static int req_tlv_space; /* request message TLV area size */ | |
71 | static int rep_headroom; /* reply message headroom to use */ | |
72 | ||
73 | ||
74 | void cfg_link_event(u32 addr, char *name, int up) | |
75 | { | |
76 | /* TIPC DOESN'T HANDLE LINK EVENT SUBSCRIPTIONS AT THE MOMENT */ | |
77 | } | |
78 | ||
79 | ||
80 | struct sk_buff *cfg_reply_alloc(int payload_size) | |
81 | { | |
82 | struct sk_buff *buf; | |
83 | ||
84 | buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC); | |
85 | if (buf) | |
86 | skb_reserve(buf, rep_headroom); | |
87 | return buf; | |
88 | } | |
89 | ||
90 | int cfg_append_tlv(struct sk_buff *buf, int tlv_type, | |
91 | void *tlv_data, int tlv_data_size) | |
92 | { | |
93 | struct tlv_desc *tlv = (struct tlv_desc *)buf->tail; | |
94 | int new_tlv_space = TLV_SPACE(tlv_data_size); | |
95 | ||
96 | if (skb_tailroom(buf) < new_tlv_space) { | |
97 | dbg("cfg_append_tlv unable to append TLV\n"); | |
98 | return 0; | |
99 | } | |
100 | skb_put(buf, new_tlv_space); | |
101 | tlv->tlv_type = htons(tlv_type); | |
102 | tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size)); | |
103 | if (tlv_data_size && tlv_data) | |
104 | memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size); | |
105 | return 1; | |
106 | } | |
107 | ||
108 | struct sk_buff *cfg_reply_unsigned_type(u16 tlv_type, u32 value) | |
109 | { | |
110 | struct sk_buff *buf; | |
111 | u32 value_net; | |
112 | ||
113 | buf = cfg_reply_alloc(TLV_SPACE(sizeof(value))); | |
114 | if (buf) { | |
115 | value_net = htonl(value); | |
116 | cfg_append_tlv(buf, tlv_type, &value_net, | |
117 | sizeof(value_net)); | |
118 | } | |
119 | return buf; | |
120 | } | |
121 | ||
122 | struct sk_buff *cfg_reply_string_type(u16 tlv_type, char *string) | |
123 | { | |
124 | struct sk_buff *buf; | |
125 | int string_len = strlen(string) + 1; | |
126 | ||
127 | buf = cfg_reply_alloc(TLV_SPACE(string_len)); | |
128 | if (buf) | |
129 | cfg_append_tlv(buf, tlv_type, string, string_len); | |
130 | return buf; | |
131 | } | |
132 | ||
133 | ||
134 | ||
135 | ||
136 | #if 0 | |
137 | ||
138 | /* Now obsolete code for handling commands not yet implemented the new way */ | |
139 | ||
140 | int tipc_cfg_cmd(const struct tipc_cmd_msg * msg, | |
141 | char *data, | |
142 | u32 sz, | |
143 | u32 *ret_size, | |
144 | struct tipc_portid *orig) | |
145 | { | |
146 | int rv = -EINVAL; | |
147 | u32 cmd = msg->cmd; | |
148 | ||
149 | *ret_size = 0; | |
150 | switch (cmd) { | |
151 | case TIPC_REMOVE_LINK: | |
152 | case TIPC_CMD_BLOCK_LINK: | |
153 | case TIPC_CMD_UNBLOCK_LINK: | |
154 | if (!cfg_check_connection(orig)) | |
155 | rv = link_control(msg->argv.link_name, msg->cmd, 0); | |
156 | break; | |
157 | case TIPC_ESTABLISH: | |
158 | { | |
159 | int connected; | |
160 | ||
161 | tipc_isconnected(mng.conn_port_ref, &connected); | |
162 | if (connected || !orig) { | |
163 | rv = TIPC_FAILURE; | |
164 | break; | |
165 | } | |
166 | rv = tipc_connect2port(mng.conn_port_ref, orig); | |
167 | if (rv == TIPC_OK) | |
168 | orig = 0; | |
169 | break; | |
170 | } | |
171 | case TIPC_GET_PEER_ADDRESS: | |
172 | *ret_size = link_peer_addr(msg->argv.link_name, data, sz); | |
173 | break; | |
174 | case TIPC_GET_ROUTES: | |
175 | rv = TIPC_OK; | |
176 | break; | |
177 | default: {} | |
178 | } | |
179 | if (*ret_size) | |
180 | rv = TIPC_OK; | |
181 | return rv; | |
182 | } | |
183 | ||
184 | static void cfg_cmd_event(struct tipc_cmd_msg *msg, | |
185 | char *data, | |
186 | u32 sz, | |
187 | struct tipc_portid const *orig) | |
188 | { | |
189 | int rv = -EINVAL; | |
190 | struct tipc_cmd_result_msg rmsg; | |
191 | struct iovec msg_sect[2]; | |
192 | int *arg; | |
193 | ||
194 | msg->cmd = ntohl(msg->cmd); | |
195 | ||
196 | cfg_prepare_res_msg(msg->cmd, msg->usr_handle, rv, &rmsg, msg_sect, | |
197 | data, 0); | |
198 | if (ntohl(msg->magic) != TIPC_MAGIC) | |
199 | goto exit; | |
200 | ||
201 | switch (msg->cmd) { | |
202 | case TIPC_CREATE_LINK: | |
203 | if (!cfg_check_connection(orig)) | |
204 | rv = disc_create_link(&msg->argv.create_link); | |
205 | break; | |
206 | case TIPC_LINK_SUBSCRIBE: | |
207 | { | |
208 | struct subscr_data *sub; | |
209 | ||
210 | if (mng.link_subscriptions > 64) | |
211 | break; | |
212 | sub = (struct subscr_data *)kmalloc(sizeof(*sub), | |
213 | GFP_ATOMIC); | |
214 | if (sub == NULL) { | |
215 | warn("Memory squeeze; dropped remote link subscription\n"); | |
216 | break; | |
217 | } | |
218 | INIT_LIST_HEAD(&sub->subd_list); | |
219 | tipc_createport(mng.user_ref, | |
220 | (void *)sub, | |
221 | TIPC_HIGH_IMPORTANCE, | |
222 | 0, | |
223 | 0, | |
224 | (tipc_conn_shutdown_event)cfg_linksubscr_cancel, | |
225 | 0, | |
226 | 0, | |
227 | (tipc_conn_msg_event)cfg_linksubscr_cancel, | |
228 | 0, | |
229 | &sub->port_ref); | |
230 | if (!sub->port_ref) { | |
231 | kfree(sub); | |
232 | break; | |
233 | } | |
234 | memcpy(sub->usr_handle,msg->usr_handle, | |
235 | sizeof(sub->usr_handle)); | |
236 | sub->domain = msg->argv.domain; | |
237 | list_add_tail(&sub->subd_list, &mng.link_subscribers); | |
238 | tipc_connect2port(sub->port_ref, orig); | |
239 | rmsg.retval = TIPC_OK; | |
240 | tipc_send(sub->port_ref, 2u, msg_sect); | |
241 | mng.link_subscriptions++; | |
242 | return; | |
243 | } | |
244 | default: | |
245 | rv = tipc_cfg_cmd(msg, data, sz, (u32 *)&msg_sect[1].iov_len, orig); | |
246 | } | |
247 | exit: | |
248 | rmsg.result_len = htonl(msg_sect[1].iov_len); | |
249 | rmsg.retval = htonl(rv); | |
250 | cfg_respond(msg_sect, 2u, orig); | |
251 | } | |
252 | #endif | |
253 | ||
254 | static struct sk_buff *cfg_enable_bearer(void) | |
255 | { | |
256 | struct tipc_bearer_config *args; | |
257 | ||
258 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG)) | |
259 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
260 | ||
261 | args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area); | |
262 | if (tipc_enable_bearer(args->name, | |
263 | ntohl(args->detect_scope), | |
264 | ntohl(args->priority))) | |
265 | return cfg_reply_error_string("unable to enable bearer"); | |
266 | ||
267 | return cfg_reply_none(); | |
268 | } | |
269 | ||
270 | static struct sk_buff *cfg_disable_bearer(void) | |
271 | { | |
272 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME)) | |
273 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
274 | ||
275 | if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area))) | |
276 | return cfg_reply_error_string("unable to disable bearer"); | |
277 | ||
278 | return cfg_reply_none(); | |
279 | } | |
280 | ||
281 | static struct sk_buff *cfg_set_own_addr(void) | |
282 | { | |
283 | u32 addr; | |
284 | ||
285 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR)) | |
286 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
287 | ||
288 | addr = *(u32 *)TLV_DATA(req_tlv_area); | |
289 | addr = ntohl(addr); | |
290 | if (addr == tipc_own_addr) | |
291 | return cfg_reply_none(); | |
292 | if (!addr_node_valid(addr)) | |
293 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
294 | " (node address)"); | |
295 | if (tipc_own_addr) | |
296 | return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
297 | " (cannot change node address once assigned)"); | |
298 | ||
299 | spin_unlock_bh(&config_lock); | |
300 | stop_net(); | |
301 | tipc_own_addr = addr; | |
302 | start_net(); | |
303 | spin_lock_bh(&config_lock); | |
304 | return cfg_reply_none(); | |
305 | } | |
306 | ||
307 | static struct sk_buff *cfg_set_remote_mng(void) | |
308 | { | |
309 | u32 value; | |
310 | ||
311 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
312 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
313 | ||
314 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
315 | value = ntohl(value); | |
316 | tipc_remote_management = (value != 0); | |
317 | return cfg_reply_none(); | |
318 | } | |
319 | ||
320 | static struct sk_buff *cfg_set_max_publications(void) | |
321 | { | |
322 | u32 value; | |
323 | ||
324 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
325 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
326 | ||
327 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
328 | value = ntohl(value); | |
329 | if (value != delimit(value, 1, 65535)) | |
330 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
331 | " (max publications must be 1-65535)"); | |
332 | tipc_max_publications = value; | |
333 | return cfg_reply_none(); | |
334 | } | |
335 | ||
336 | static struct sk_buff *cfg_set_max_subscriptions(void) | |
337 | { | |
338 | u32 value; | |
339 | ||
340 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
341 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
342 | ||
343 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
344 | value = ntohl(value); | |
345 | if (value != delimit(value, 1, 65535)) | |
346 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
347 | " (max subscriptions must be 1-65535"); | |
348 | tipc_max_subscriptions = value; | |
349 | return cfg_reply_none(); | |
350 | } | |
351 | ||
352 | static struct sk_buff *cfg_set_max_ports(void) | |
353 | { | |
354 | int orig_mode; | |
355 | u32 value; | |
356 | ||
357 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
358 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
359 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
360 | value = ntohl(value); | |
361 | if (value != delimit(value, 127, 65535)) | |
362 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
363 | " (max ports must be 127-65535)"); | |
364 | ||
365 | if (value == tipc_max_ports) | |
366 | return cfg_reply_none(); | |
367 | ||
368 | if (atomic_read(&tipc_user_count) > 2) | |
369 | return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
370 | " (cannot change max ports while TIPC users exist)"); | |
371 | ||
372 | spin_unlock_bh(&config_lock); | |
373 | orig_mode = tipc_get_mode(); | |
374 | if (orig_mode == TIPC_NET_MODE) | |
375 | stop_net(); | |
376 | stop_core(); | |
377 | tipc_max_ports = value; | |
378 | start_core(); | |
379 | if (orig_mode == TIPC_NET_MODE) | |
380 | start_net(); | |
381 | spin_lock_bh(&config_lock); | |
382 | return cfg_reply_none(); | |
383 | } | |
384 | ||
385 | static struct sk_buff *set_net_max(int value, int *parameter) | |
386 | { | |
387 | int orig_mode; | |
388 | ||
389 | if (value != *parameter) { | |
390 | orig_mode = tipc_get_mode(); | |
391 | if (orig_mode == TIPC_NET_MODE) | |
392 | stop_net(); | |
393 | *parameter = value; | |
394 | if (orig_mode == TIPC_NET_MODE) | |
395 | start_net(); | |
396 | } | |
397 | ||
398 | return cfg_reply_none(); | |
399 | } | |
400 | ||
401 | static struct sk_buff *cfg_set_max_zones(void) | |
402 | { | |
403 | u32 value; | |
404 | ||
405 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
406 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
407 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
408 | value = ntohl(value); | |
409 | if (value != delimit(value, 1, 255)) | |
410 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
411 | " (max zones must be 1-255)"); | |
412 | return set_net_max(value, &tipc_max_zones); | |
413 | } | |
414 | ||
415 | static struct sk_buff *cfg_set_max_clusters(void) | |
416 | { | |
417 | u32 value; | |
418 | ||
419 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
420 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
421 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
422 | value = ntohl(value); | |
423 | if (value != 1) | |
424 | return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
425 | " (max clusters fixed at 1)"); | |
426 | return cfg_reply_none(); | |
427 | } | |
428 | ||
429 | static struct sk_buff *cfg_set_max_nodes(void) | |
430 | { | |
431 | u32 value; | |
432 | ||
433 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
434 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
435 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
436 | value = ntohl(value); | |
437 | if (value != delimit(value, 8, 2047)) | |
438 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
439 | " (max nodes must be 8-2047)"); | |
440 | return set_net_max(value, &tipc_max_nodes); | |
441 | } | |
442 | ||
443 | static struct sk_buff *cfg_set_max_slaves(void) | |
444 | { | |
445 | u32 value; | |
446 | ||
447 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
448 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
449 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
450 | value = ntohl(value); | |
451 | if (value != 0) | |
452 | return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
453 | " (max secondary nodes fixed at 0)"); | |
454 | return cfg_reply_none(); | |
455 | } | |
456 | ||
457 | static struct sk_buff *cfg_set_netid(void) | |
458 | { | |
459 | u32 value; | |
460 | ||
461 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
462 | return cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
463 | value = *(u32 *)TLV_DATA(req_tlv_area); | |
464 | value = ntohl(value); | |
465 | if (value != delimit(value, 1, 9999)) | |
466 | return cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
467 | " (network id must be 1-9999)"); | |
468 | ||
469 | if (tipc_own_addr) | |
470 | return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
471 | " (cannot change network id once part of network)"); | |
472 | ||
473 | return set_net_max(value, &tipc_net_id); | |
474 | } | |
475 | ||
476 | struct sk_buff *cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area, | |
477 | int request_space, int reply_headroom) | |
478 | { | |
479 | struct sk_buff *rep_tlv_buf; | |
480 | ||
481 | spin_lock_bh(&config_lock); | |
482 | ||
483 | /* Save request and reply details in a well-known location */ | |
484 | ||
485 | req_tlv_area = request_area; | |
486 | req_tlv_space = request_space; | |
487 | rep_headroom = reply_headroom; | |
488 | ||
489 | /* Check command authorization */ | |
490 | ||
491 | if (likely(orig_node == tipc_own_addr)) { | |
492 | /* command is permitted */ | |
493 | } else if (cmd >= 0x8000) { | |
494 | rep_tlv_buf = cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
495 | " (cannot be done remotely)"); | |
496 | goto exit; | |
497 | } else if (!tipc_remote_management) { | |
498 | rep_tlv_buf = cfg_reply_error_string(TIPC_CFG_NO_REMOTE); | |
499 | goto exit; | |
500 | } | |
501 | else if (cmd >= 0x4000) { | |
502 | u32 domain = 0; | |
503 | ||
504 | if ((nametbl_translate(TIPC_ZM_SRV, 0, &domain) == 0) || | |
505 | (domain != orig_node)) { | |
506 | rep_tlv_buf = cfg_reply_error_string(TIPC_CFG_NOT_ZONE_MSTR); | |
507 | goto exit; | |
508 | } | |
509 | } | |
510 | ||
511 | /* Call appropriate processing routine */ | |
512 | ||
513 | switch (cmd) { | |
514 | case TIPC_CMD_NOOP: | |
515 | rep_tlv_buf = cfg_reply_none(); | |
516 | break; | |
517 | case TIPC_CMD_GET_NODES: | |
518 | rep_tlv_buf = node_get_nodes(req_tlv_area, req_tlv_space); | |
519 | break; | |
520 | case TIPC_CMD_GET_LINKS: | |
521 | rep_tlv_buf = node_get_links(req_tlv_area, req_tlv_space); | |
522 | break; | |
523 | case TIPC_CMD_SHOW_LINK_STATS: | |
524 | rep_tlv_buf = link_cmd_show_stats(req_tlv_area, req_tlv_space); | |
525 | break; | |
526 | case TIPC_CMD_RESET_LINK_STATS: | |
527 | rep_tlv_buf = link_cmd_reset_stats(req_tlv_area, req_tlv_space); | |
528 | break; | |
529 | case TIPC_CMD_SHOW_NAME_TABLE: | |
530 | rep_tlv_buf = nametbl_get(req_tlv_area, req_tlv_space); | |
531 | break; | |
532 | case TIPC_CMD_GET_BEARER_NAMES: | |
533 | rep_tlv_buf = bearer_get_names(); | |
534 | break; | |
535 | case TIPC_CMD_GET_MEDIA_NAMES: | |
536 | rep_tlv_buf = media_get_names(); | |
537 | break; | |
538 | case TIPC_CMD_SHOW_PORTS: | |
539 | rep_tlv_buf = port_get_ports(); | |
540 | break; | |
541 | #if 0 | |
542 | case TIPC_CMD_SHOW_PORT_STATS: | |
543 | rep_tlv_buf = port_show_stats(req_tlv_area, req_tlv_space); | |
544 | break; | |
545 | case TIPC_CMD_RESET_PORT_STATS: | |
546 | rep_tlv_buf = cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED); | |
547 | break; | |
548 | #endif | |
549 | case TIPC_CMD_SET_LOG_SIZE: | |
550 | rep_tlv_buf = log_resize(req_tlv_area, req_tlv_space); | |
551 | break; | |
552 | case TIPC_CMD_DUMP_LOG: | |
553 | rep_tlv_buf = log_dump(); | |
554 | break; | |
555 | case TIPC_CMD_SET_LINK_TOL: | |
556 | case TIPC_CMD_SET_LINK_PRI: | |
557 | case TIPC_CMD_SET_LINK_WINDOW: | |
558 | rep_tlv_buf = link_cmd_config(req_tlv_area, req_tlv_space, cmd); | |
559 | break; | |
560 | case TIPC_CMD_ENABLE_BEARER: | |
561 | rep_tlv_buf = cfg_enable_bearer(); | |
562 | break; | |
563 | case TIPC_CMD_DISABLE_BEARER: | |
564 | rep_tlv_buf = cfg_disable_bearer(); | |
565 | break; | |
566 | case TIPC_CMD_SET_NODE_ADDR: | |
567 | rep_tlv_buf = cfg_set_own_addr(); | |
568 | break; | |
569 | case TIPC_CMD_SET_REMOTE_MNG: | |
570 | rep_tlv_buf = cfg_set_remote_mng(); | |
571 | break; | |
572 | case TIPC_CMD_SET_MAX_PORTS: | |
573 | rep_tlv_buf = cfg_set_max_ports(); | |
574 | break; | |
575 | case TIPC_CMD_SET_MAX_PUBL: | |
576 | rep_tlv_buf = cfg_set_max_publications(); | |
577 | break; | |
578 | case TIPC_CMD_SET_MAX_SUBSCR: | |
579 | rep_tlv_buf = cfg_set_max_subscriptions(); | |
580 | break; | |
581 | case TIPC_CMD_SET_MAX_ZONES: | |
582 | rep_tlv_buf = cfg_set_max_zones(); | |
583 | break; | |
584 | case TIPC_CMD_SET_MAX_CLUSTERS: | |
585 | rep_tlv_buf = cfg_set_max_clusters(); | |
586 | break; | |
587 | case TIPC_CMD_SET_MAX_NODES: | |
588 | rep_tlv_buf = cfg_set_max_nodes(); | |
589 | break; | |
590 | case TIPC_CMD_SET_MAX_SLAVES: | |
591 | rep_tlv_buf = cfg_set_max_slaves(); | |
592 | break; | |
593 | case TIPC_CMD_SET_NETID: | |
594 | rep_tlv_buf = cfg_set_netid(); | |
595 | break; | |
596 | case TIPC_CMD_GET_REMOTE_MNG: | |
597 | rep_tlv_buf = cfg_reply_unsigned(tipc_remote_management); | |
598 | break; | |
599 | case TIPC_CMD_GET_MAX_PORTS: | |
600 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_ports); | |
601 | break; | |
602 | case TIPC_CMD_GET_MAX_PUBL: | |
603 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_publications); | |
604 | break; | |
605 | case TIPC_CMD_GET_MAX_SUBSCR: | |
606 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_subscriptions); | |
607 | break; | |
608 | case TIPC_CMD_GET_MAX_ZONES: | |
609 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_zones); | |
610 | break; | |
611 | case TIPC_CMD_GET_MAX_CLUSTERS: | |
612 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_clusters); | |
613 | break; | |
614 | case TIPC_CMD_GET_MAX_NODES: | |
615 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_nodes); | |
616 | break; | |
617 | case TIPC_CMD_GET_MAX_SLAVES: | |
618 | rep_tlv_buf = cfg_reply_unsigned(tipc_max_slaves); | |
619 | break; | |
620 | case TIPC_CMD_GET_NETID: | |
621 | rep_tlv_buf = cfg_reply_unsigned(tipc_net_id); | |
622 | break; | |
623 | default: | |
624 | rep_tlv_buf = NULL; | |
625 | break; | |
626 | } | |
627 | ||
628 | /* Return reply buffer */ | |
629 | exit: | |
630 | spin_unlock_bh(&config_lock); | |
631 | return rep_tlv_buf; | |
632 | } | |
633 | ||
634 | static void cfg_named_msg_event(void *userdata, | |
635 | u32 port_ref, | |
636 | struct sk_buff **buf, | |
637 | const unchar *msg, | |
638 | u32 size, | |
639 | u32 importance, | |
640 | struct tipc_portid const *orig, | |
641 | struct tipc_name_seq const *dest) | |
642 | { | |
643 | struct tipc_cfg_msg_hdr *req_hdr; | |
644 | struct tipc_cfg_msg_hdr *rep_hdr; | |
645 | struct sk_buff *rep_buf; | |
646 | ||
647 | /* Validate configuration message header (ignore invalid message) */ | |
648 | ||
649 | req_hdr = (struct tipc_cfg_msg_hdr *)msg; | |
650 | if ((size < sizeof(*req_hdr)) || | |
651 | (size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) || | |
652 | (ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) { | |
653 | warn("discarded invalid configuration message\n"); | |
654 | return; | |
655 | } | |
656 | ||
657 | /* Generate reply for request (if can't, return request) */ | |
658 | ||
659 | rep_buf = cfg_do_cmd(orig->node, | |
660 | ntohs(req_hdr->tcm_type), | |
661 | msg + sizeof(*req_hdr), | |
662 | size - sizeof(*req_hdr), | |
663 | BUF_HEADROOM + MAX_H_SIZE + sizeof(*rep_hdr)); | |
664 | if (rep_buf) { | |
665 | skb_push(rep_buf, sizeof(*rep_hdr)); | |
666 | rep_hdr = (struct tipc_cfg_msg_hdr *)rep_buf->data; | |
667 | memcpy(rep_hdr, req_hdr, sizeof(*rep_hdr)); | |
668 | rep_hdr->tcm_len = htonl(rep_buf->len); | |
669 | rep_hdr->tcm_flags &= htons(~TCM_F_REQUEST); | |
670 | } else { | |
671 | rep_buf = *buf; | |
672 | *buf = NULL; | |
673 | } | |
674 | ||
675 | /* NEED TO ADD CODE TO HANDLE FAILED SEND (SUCH AS CONGESTION) */ | |
676 | tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len); | |
677 | } | |
678 | ||
679 | int cfg_init(void) | |
680 | { | |
681 | struct tipc_name_seq seq; | |
682 | int res; | |
683 | ||
684 | memset(&mng, 0, sizeof(mng)); | |
685 | INIT_LIST_HEAD(&mng.link_subscribers); | |
686 | ||
687 | res = tipc_attach(&mng.user_ref, 0, 0); | |
688 | if (res) | |
689 | goto failed; | |
690 | ||
691 | res = tipc_createport(mng.user_ref, 0, TIPC_CRITICAL_IMPORTANCE, | |
692 | NULL, NULL, NULL, | |
693 | NULL, cfg_named_msg_event, NULL, | |
694 | NULL, &mng.port_ref); | |
695 | if (res) | |
696 | goto failed; | |
697 | ||
698 | seq.type = TIPC_CFG_SRV; | |
699 | seq.lower = seq.upper = tipc_own_addr; | |
700 | res = nametbl_publish_rsv(mng.port_ref, TIPC_ZONE_SCOPE, &seq); | |
701 | if (res) | |
702 | goto failed; | |
703 | ||
704 | return 0; | |
705 | ||
706 | failed: | |
707 | err("Unable to create configuration service\n"); | |
708 | tipc_detach(mng.user_ref); | |
709 | mng.user_ref = 0; | |
710 | return res; | |
711 | } | |
712 | ||
713 | void cfg_stop(void) | |
714 | { | |
715 | if (mng.user_ref) { | |
716 | tipc_detach(mng.user_ref); | |
717 | mng.user_ref = 0; | |
718 | } | |
719 | } |