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