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Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/config.c: TIPC configuration management code | |
c4307285 | 3 | * |
593a5f22 | 4 | * Copyright (c) 2002-2006, Ericsson AB |
59f0c452 | 5 | * Copyright (c) 2004-2007, 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; | |
b97bf3fd PL |
59 | }; |
60 | ||
61 | static struct manager mng = { 0}; | |
62 | ||
34af946a | 63 | static DEFINE_SPINLOCK(config_lock); |
b97bf3fd PL |
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 | ||
4323add6 | 70 | struct sk_buff *tipc_cfg_reply_alloc(int payload_size) |
b97bf3fd PL |
71 | { |
72 | struct sk_buff *buf; | |
73 | ||
74 | buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC); | |
75 | if (buf) | |
76 | skb_reserve(buf, rep_headroom); | |
77 | return buf; | |
78 | } | |
79 | ||
c4307285 | 80 | int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type, |
4323add6 | 81 | void *tlv_data, int tlv_data_size) |
b97bf3fd | 82 | { |
27a884dc | 83 | struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(buf); |
b97bf3fd PL |
84 | int new_tlv_space = TLV_SPACE(tlv_data_size); |
85 | ||
86 | if (skb_tailroom(buf) < new_tlv_space) { | |
4323add6 | 87 | dbg("tipc_cfg_append_tlv unable to append TLV\n"); |
b97bf3fd PL |
88 | return 0; |
89 | } | |
90 | skb_put(buf, new_tlv_space); | |
91 | tlv->tlv_type = htons(tlv_type); | |
92 | tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size)); | |
93 | if (tlv_data_size && tlv_data) | |
94 | memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size); | |
95 | return 1; | |
96 | } | |
97 | ||
4323add6 | 98 | struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value) |
b97bf3fd PL |
99 | { |
100 | struct sk_buff *buf; | |
3e6c8cd5 | 101 | __be32 value_net; |
b97bf3fd | 102 | |
4323add6 | 103 | buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value))); |
b97bf3fd PL |
104 | if (buf) { |
105 | value_net = htonl(value); | |
c4307285 | 106 | tipc_cfg_append_tlv(buf, tlv_type, &value_net, |
4323add6 | 107 | sizeof(value_net)); |
b97bf3fd PL |
108 | } |
109 | return buf; | |
110 | } | |
111 | ||
4323add6 | 112 | struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string) |
b97bf3fd PL |
113 | { |
114 | struct sk_buff *buf; | |
115 | int string_len = strlen(string) + 1; | |
116 | ||
4323add6 | 117 | buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len)); |
b97bf3fd | 118 | if (buf) |
4323add6 | 119 | tipc_cfg_append_tlv(buf, tlv_type, string, string_len); |
b97bf3fd PL |
120 | return buf; |
121 | } | |
122 | ||
123 | ||
b97bf3fd PL |
124 | #if 0 |
125 | ||
126 | /* Now obsolete code for handling commands not yet implemented the new way */ | |
127 | ||
289464e4 AS |
128 | /* |
129 | * Some of this code assumed that the manager structure contains two added | |
130 | * fields: | |
131 | * u32 link_subscriptions; | |
132 | * struct list_head link_subscribers; | |
133 | * which are currently not present. These fields may need to be re-introduced | |
134 | * if and when support for link subscriptions is added. | |
135 | */ | |
136 | ||
137 | void tipc_cfg_link_event(u32 addr, char *name, int up) | |
138 | { | |
139 | /* TIPC DOESN'T HANDLE LINK EVENT SUBSCRIPTIONS AT THE MOMENT */ | |
140 | } | |
141 | ||
b97bf3fd PL |
142 | int tipc_cfg_cmd(const struct tipc_cmd_msg * msg, |
143 | char *data, | |
144 | u32 sz, | |
145 | u32 *ret_size, | |
146 | struct tipc_portid *orig) | |
147 | { | |
148 | int rv = -EINVAL; | |
149 | u32 cmd = msg->cmd; | |
150 | ||
151 | *ret_size = 0; | |
152 | switch (cmd) { | |
153 | case TIPC_REMOVE_LINK: | |
154 | case TIPC_CMD_BLOCK_LINK: | |
155 | case TIPC_CMD_UNBLOCK_LINK: | |
156 | if (!cfg_check_connection(orig)) | |
157 | rv = link_control(msg->argv.link_name, msg->cmd, 0); | |
158 | break; | |
159 | case TIPC_ESTABLISH: | |
160 | { | |
161 | int connected; | |
162 | ||
163 | tipc_isconnected(mng.conn_port_ref, &connected); | |
164 | if (connected || !orig) { | |
165 | rv = TIPC_FAILURE; | |
166 | break; | |
167 | } | |
168 | rv = tipc_connect2port(mng.conn_port_ref, orig); | |
169 | if (rv == TIPC_OK) | |
170 | orig = 0; | |
171 | break; | |
172 | } | |
173 | case TIPC_GET_PEER_ADDRESS: | |
174 | *ret_size = link_peer_addr(msg->argv.link_name, data, sz); | |
175 | break; | |
176 | case TIPC_GET_ROUTES: | |
177 | rv = TIPC_OK; | |
178 | break; | |
179 | default: {} | |
180 | } | |
181 | if (*ret_size) | |
182 | rv = TIPC_OK; | |
183 | return rv; | |
184 | } | |
185 | ||
186 | static void cfg_cmd_event(struct tipc_cmd_msg *msg, | |
187 | char *data, | |
c4307285 | 188 | u32 sz, |
b97bf3fd PL |
189 | struct tipc_portid const *orig) |
190 | { | |
191 | int rv = -EINVAL; | |
192 | struct tipc_cmd_result_msg rmsg; | |
193 | struct iovec msg_sect[2]; | |
194 | int *arg; | |
195 | ||
196 | msg->cmd = ntohl(msg->cmd); | |
197 | ||
c4307285 | 198 | cfg_prepare_res_msg(msg->cmd, msg->usr_handle, rv, &rmsg, msg_sect, |
b97bf3fd PL |
199 | data, 0); |
200 | if (ntohl(msg->magic) != TIPC_MAGIC) | |
201 | goto exit; | |
202 | ||
203 | switch (msg->cmd) { | |
204 | case TIPC_CREATE_LINK: | |
205 | if (!cfg_check_connection(orig)) | |
206 | rv = disc_create_link(&msg->argv.create_link); | |
207 | break; | |
208 | case TIPC_LINK_SUBSCRIBE: | |
209 | { | |
210 | struct subscr_data *sub; | |
211 | ||
212 | if (mng.link_subscriptions > 64) | |
213 | break; | |
5cbded58 | 214 | sub = kmalloc(sizeof(*sub), |
b97bf3fd PL |
215 | GFP_ATOMIC); |
216 | if (sub == NULL) { | |
217 | warn("Memory squeeze; dropped remote link subscription\n"); | |
218 | break; | |
219 | } | |
220 | INIT_LIST_HEAD(&sub->subd_list); | |
221 | tipc_createport(mng.user_ref, | |
222 | (void *)sub, | |
223 | TIPC_HIGH_IMPORTANCE, | |
224 | 0, | |
225 | 0, | |
226 | (tipc_conn_shutdown_event)cfg_linksubscr_cancel, | |
227 | 0, | |
228 | 0, | |
229 | (tipc_conn_msg_event)cfg_linksubscr_cancel, | |
230 | 0, | |
231 | &sub->port_ref); | |
232 | if (!sub->port_ref) { | |
233 | kfree(sub); | |
234 | break; | |
235 | } | |
236 | memcpy(sub->usr_handle,msg->usr_handle, | |
237 | sizeof(sub->usr_handle)); | |
238 | sub->domain = msg->argv.domain; | |
239 | list_add_tail(&sub->subd_list, &mng.link_subscribers); | |
240 | tipc_connect2port(sub->port_ref, orig); | |
241 | rmsg.retval = TIPC_OK; | |
242 | tipc_send(sub->port_ref, 2u, msg_sect); | |
243 | mng.link_subscriptions++; | |
244 | return; | |
245 | } | |
246 | default: | |
247 | rv = tipc_cfg_cmd(msg, data, sz, (u32 *)&msg_sect[1].iov_len, orig); | |
248 | } | |
107e7be6 | 249 | exit: |
b97bf3fd PL |
250 | rmsg.result_len = htonl(msg_sect[1].iov_len); |
251 | rmsg.retval = htonl(rv); | |
4323add6 | 252 | tipc_cfg_respond(msg_sect, 2u, orig); |
b97bf3fd PL |
253 | } |
254 | #endif | |
255 | ||
107e7be6 AS |
256 | #define MAX_STATS_INFO 2000 |
257 | ||
258 | static struct sk_buff *tipc_show_stats(void) | |
259 | { | |
260 | struct sk_buff *buf; | |
261 | struct tlv_desc *rep_tlv; | |
262 | struct print_buf pb; | |
263 | int str_len; | |
264 | u32 value; | |
265 | ||
266 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
267 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); | |
268 | ||
269 | value = ntohl(*(u32 *)TLV_DATA(req_tlv_area)); | |
270 | if (value != 0) | |
271 | return tipc_cfg_reply_error_string("unsupported argument"); | |
272 | ||
273 | buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_STATS_INFO)); | |
274 | if (buf == NULL) | |
275 | return NULL; | |
276 | ||
277 | rep_tlv = (struct tlv_desc *)buf->data; | |
278 | tipc_printbuf_init(&pb, (char *)TLV_DATA(rep_tlv), MAX_STATS_INFO); | |
279 | ||
280 | tipc_printf(&pb, "TIPC version " TIPC_MOD_VER "\n"); | |
281 | ||
282 | /* Use additional tipc_printf()'s to return more info ... */ | |
283 | ||
284 | str_len = tipc_printbuf_validate(&pb); | |
285 | skb_put(buf, TLV_SPACE(str_len)); | |
286 | TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len); | |
287 | ||
288 | return buf; | |
289 | } | |
290 | ||
b97bf3fd PL |
291 | static struct sk_buff *cfg_enable_bearer(void) |
292 | { | |
293 | struct tipc_bearer_config *args; | |
294 | ||
295 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG)) | |
4323add6 | 296 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
297 | |
298 | args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area); | |
299 | if (tipc_enable_bearer(args->name, | |
300 | ntohl(args->detect_scope), | |
301 | ntohl(args->priority))) | |
4323add6 | 302 | return tipc_cfg_reply_error_string("unable to enable bearer"); |
b97bf3fd | 303 | |
4323add6 | 304 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
305 | } |
306 | ||
307 | static struct sk_buff *cfg_disable_bearer(void) | |
308 | { | |
309 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME)) | |
4323add6 | 310 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd PL |
311 | |
312 | if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area))) | |
4323add6 | 313 | return tipc_cfg_reply_error_string("unable to disable bearer"); |
b97bf3fd | 314 | |
4323add6 | 315 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
316 | } |
317 | ||
318 | static struct sk_buff *cfg_set_own_addr(void) | |
319 | { | |
320 | u32 addr; | |
321 | ||
322 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR)) | |
4323add6 | 323 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd | 324 | |
3e6c8cd5 | 325 | addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 326 | if (addr == tipc_own_addr) |
4323add6 PL |
327 | return tipc_cfg_reply_none(); |
328 | if (!tipc_addr_node_valid(addr)) | |
329 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
330 | " (node address)"); | |
e100ae92 | 331 | if (tipc_mode == TIPC_NET_MODE) |
4323add6 PL |
332 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
333 | " (cannot change node address once assigned)"); | |
e100ae92 | 334 | |
c4307285 | 335 | /* |
e100ae92 AS |
336 | * Must release all spinlocks before calling start_net() because |
337 | * Linux version of TIPC calls eth_media_start() which calls | |
338 | * register_netdevice_notifier() which may block! | |
339 | * | |
340 | * Temporarily releasing the lock should be harmless for non-Linux TIPC, | |
341 | * but Linux version of eth_media_start() should really be reworked | |
342 | * so that it can be called with spinlocks held. | |
343 | */ | |
b97bf3fd PL |
344 | |
345 | spin_unlock_bh(&config_lock); | |
03194379 | 346 | tipc_core_start_net(addr); |
b97bf3fd | 347 | spin_lock_bh(&config_lock); |
4323add6 | 348 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
349 | } |
350 | ||
351 | static struct sk_buff *cfg_set_remote_mng(void) | |
352 | { | |
353 | u32 value; | |
354 | ||
355 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 356 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd | 357 | |
3e6c8cd5 | 358 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 359 | tipc_remote_management = (value != 0); |
4323add6 | 360 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
361 | } |
362 | ||
363 | static struct sk_buff *cfg_set_max_publications(void) | |
364 | { | |
365 | u32 value; | |
366 | ||
367 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 368 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd | 369 | |
3e6c8cd5 | 370 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 371 | if (value != delimit(value, 1, 65535)) |
4323add6 PL |
372 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
373 | " (max publications must be 1-65535)"); | |
b97bf3fd | 374 | tipc_max_publications = value; |
4323add6 | 375 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
376 | } |
377 | ||
378 | static struct sk_buff *cfg_set_max_subscriptions(void) | |
379 | { | |
380 | u32 value; | |
381 | ||
382 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 383 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
b97bf3fd | 384 | |
3e6c8cd5 | 385 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 386 | if (value != delimit(value, 1, 65535)) |
4323add6 PL |
387 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
388 | " (max subscriptions must be 1-65535"); | |
b97bf3fd | 389 | tipc_max_subscriptions = value; |
4323add6 | 390 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
391 | } |
392 | ||
393 | static struct sk_buff *cfg_set_max_ports(void) | |
394 | { | |
b97bf3fd PL |
395 | u32 value; |
396 | ||
397 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 398 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 399 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
400 | if (value == tipc_max_ports) |
401 | return tipc_cfg_reply_none(); | |
b97bf3fd | 402 | if (value != delimit(value, 127, 65535)) |
4323add6 PL |
403 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
404 | " (max ports must be 127-65535)"); | |
e100ae92 | 405 | if (tipc_mode != TIPC_NOT_RUNNING) |
4323add6 | 406 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
e100ae92 | 407 | " (cannot change max ports while TIPC is active)"); |
b97bf3fd | 408 | tipc_max_ports = value; |
4323add6 | 409 | return tipc_cfg_reply_none(); |
b97bf3fd PL |
410 | } |
411 | ||
412 | static struct sk_buff *cfg_set_max_zones(void) | |
413 | { | |
414 | u32 value; | |
415 | ||
416 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 417 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 418 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
419 | if (value == tipc_max_zones) |
420 | return tipc_cfg_reply_none(); | |
b97bf3fd | 421 | if (value != delimit(value, 1, 255)) |
4323add6 PL |
422 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
423 | " (max zones must be 1-255)"); | |
e100ae92 AS |
424 | if (tipc_mode == TIPC_NET_MODE) |
425 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
426 | " (cannot change max zones once TIPC has joined a network)"); | |
427 | tipc_max_zones = value; | |
428 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
429 | } |
430 | ||
431 | static struct sk_buff *cfg_set_max_clusters(void) | |
432 | { | |
433 | u32 value; | |
434 | ||
435 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 436 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 437 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
438 | if (value != delimit(value, 1, 1)) |
439 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE | |
4323add6 PL |
440 | " (max clusters fixed at 1)"); |
441 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
442 | } |
443 | ||
444 | static struct sk_buff *cfg_set_max_nodes(void) | |
445 | { | |
446 | u32 value; | |
447 | ||
448 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 449 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 450 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
451 | if (value == tipc_max_nodes) |
452 | return tipc_cfg_reply_none(); | |
b97bf3fd | 453 | if (value != delimit(value, 8, 2047)) |
4323add6 PL |
454 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
455 | " (max nodes must be 8-2047)"); | |
e100ae92 AS |
456 | if (tipc_mode == TIPC_NET_MODE) |
457 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED | |
458 | " (cannot change max nodes once TIPC has joined a network)"); | |
459 | tipc_max_nodes = value; | |
460 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
461 | } |
462 | ||
463 | static struct sk_buff *cfg_set_max_slaves(void) | |
464 | { | |
465 | u32 value; | |
466 | ||
467 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 468 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 469 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
b97bf3fd | 470 | if (value != 0) |
4323add6 PL |
471 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
472 | " (max secondary nodes fixed at 0)"); | |
473 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
474 | } |
475 | ||
476 | static struct sk_buff *cfg_set_netid(void) | |
477 | { | |
478 | u32 value; | |
479 | ||
480 | if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED)) | |
4323add6 | 481 | return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR); |
3e6c8cd5 | 482 | value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area)); |
e100ae92 AS |
483 | if (value == tipc_net_id) |
484 | return tipc_cfg_reply_none(); | |
b97bf3fd | 485 | if (value != delimit(value, 1, 9999)) |
4323add6 PL |
486 | return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE |
487 | " (network id must be 1-9999)"); | |
e100ae92 | 488 | if (tipc_mode == TIPC_NET_MODE) |
4323add6 | 489 | return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
e100ae92 AS |
490 | " (cannot change network id once TIPC has joined a network)"); |
491 | tipc_net_id = value; | |
492 | return tipc_cfg_reply_none(); | |
b97bf3fd PL |
493 | } |
494 | ||
4323add6 PL |
495 | struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area, |
496 | int request_space, int reply_headroom) | |
b97bf3fd PL |
497 | { |
498 | struct sk_buff *rep_tlv_buf; | |
499 | ||
500 | spin_lock_bh(&config_lock); | |
501 | ||
502 | /* Save request and reply details in a well-known location */ | |
503 | ||
504 | req_tlv_area = request_area; | |
505 | req_tlv_space = request_space; | |
506 | rep_headroom = reply_headroom; | |
507 | ||
508 | /* Check command authorization */ | |
509 | ||
510 | if (likely(orig_node == tipc_own_addr)) { | |
511 | /* command is permitted */ | |
512 | } else if (cmd >= 0x8000) { | |
4323add6 PL |
513 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
514 | " (cannot be done remotely)"); | |
b97bf3fd PL |
515 | goto exit; |
516 | } else if (!tipc_remote_management) { | |
4323add6 | 517 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NO_REMOTE); |
b97bf3fd PL |
518 | goto exit; |
519 | } | |
520 | else if (cmd >= 0x4000) { | |
521 | u32 domain = 0; | |
522 | ||
4323add6 | 523 | if ((tipc_nametbl_translate(TIPC_ZM_SRV, 0, &domain) == 0) || |
b97bf3fd | 524 | (domain != orig_node)) { |
4323add6 | 525 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_ZONE_MSTR); |
b97bf3fd PL |
526 | goto exit; |
527 | } | |
528 | } | |
529 | ||
530 | /* Call appropriate processing routine */ | |
531 | ||
532 | switch (cmd) { | |
533 | case TIPC_CMD_NOOP: | |
4323add6 | 534 | rep_tlv_buf = tipc_cfg_reply_none(); |
b97bf3fd PL |
535 | break; |
536 | case TIPC_CMD_GET_NODES: | |
4323add6 | 537 | rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
538 | break; |
539 | case TIPC_CMD_GET_LINKS: | |
4323add6 | 540 | rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
541 | break; |
542 | case TIPC_CMD_SHOW_LINK_STATS: | |
4323add6 | 543 | rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
544 | break; |
545 | case TIPC_CMD_RESET_LINK_STATS: | |
4323add6 | 546 | rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
547 | break; |
548 | case TIPC_CMD_SHOW_NAME_TABLE: | |
4323add6 | 549 | rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
550 | break; |
551 | case TIPC_CMD_GET_BEARER_NAMES: | |
4323add6 | 552 | rep_tlv_buf = tipc_bearer_get_names(); |
b97bf3fd PL |
553 | break; |
554 | case TIPC_CMD_GET_MEDIA_NAMES: | |
4323add6 | 555 | rep_tlv_buf = tipc_media_get_names(); |
b97bf3fd PL |
556 | break; |
557 | case TIPC_CMD_SHOW_PORTS: | |
4323add6 | 558 | rep_tlv_buf = tipc_port_get_ports(); |
b97bf3fd PL |
559 | break; |
560 | #if 0 | |
561 | case TIPC_CMD_SHOW_PORT_STATS: | |
562 | rep_tlv_buf = port_show_stats(req_tlv_area, req_tlv_space); | |
563 | break; | |
564 | case TIPC_CMD_RESET_PORT_STATS: | |
4323add6 | 565 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED); |
b97bf3fd PL |
566 | break; |
567 | #endif | |
568 | case TIPC_CMD_SET_LOG_SIZE: | |
025adbe8 | 569 | rep_tlv_buf = tipc_log_resize_cmd(req_tlv_area, req_tlv_space); |
b97bf3fd PL |
570 | break; |
571 | case TIPC_CMD_DUMP_LOG: | |
4323add6 | 572 | rep_tlv_buf = tipc_log_dump(); |
b97bf3fd | 573 | break; |
107e7be6 AS |
574 | case TIPC_CMD_SHOW_STATS: |
575 | rep_tlv_buf = tipc_show_stats(); | |
576 | break; | |
b97bf3fd PL |
577 | case TIPC_CMD_SET_LINK_TOL: |
578 | case TIPC_CMD_SET_LINK_PRI: | |
579 | case TIPC_CMD_SET_LINK_WINDOW: | |
4323add6 | 580 | rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd); |
b97bf3fd PL |
581 | break; |
582 | case TIPC_CMD_ENABLE_BEARER: | |
583 | rep_tlv_buf = cfg_enable_bearer(); | |
584 | break; | |
585 | case TIPC_CMD_DISABLE_BEARER: | |
586 | rep_tlv_buf = cfg_disable_bearer(); | |
587 | break; | |
588 | case TIPC_CMD_SET_NODE_ADDR: | |
589 | rep_tlv_buf = cfg_set_own_addr(); | |
590 | break; | |
591 | case TIPC_CMD_SET_REMOTE_MNG: | |
592 | rep_tlv_buf = cfg_set_remote_mng(); | |
593 | break; | |
594 | case TIPC_CMD_SET_MAX_PORTS: | |
595 | rep_tlv_buf = cfg_set_max_ports(); | |
596 | break; | |
597 | case TIPC_CMD_SET_MAX_PUBL: | |
598 | rep_tlv_buf = cfg_set_max_publications(); | |
599 | break; | |
600 | case TIPC_CMD_SET_MAX_SUBSCR: | |
601 | rep_tlv_buf = cfg_set_max_subscriptions(); | |
602 | break; | |
603 | case TIPC_CMD_SET_MAX_ZONES: | |
604 | rep_tlv_buf = cfg_set_max_zones(); | |
605 | break; | |
606 | case TIPC_CMD_SET_MAX_CLUSTERS: | |
607 | rep_tlv_buf = cfg_set_max_clusters(); | |
608 | break; | |
609 | case TIPC_CMD_SET_MAX_NODES: | |
610 | rep_tlv_buf = cfg_set_max_nodes(); | |
611 | break; | |
612 | case TIPC_CMD_SET_MAX_SLAVES: | |
613 | rep_tlv_buf = cfg_set_max_slaves(); | |
614 | break; | |
615 | case TIPC_CMD_SET_NETID: | |
616 | rep_tlv_buf = cfg_set_netid(); | |
617 | break; | |
618 | case TIPC_CMD_GET_REMOTE_MNG: | |
4323add6 | 619 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_remote_management); |
b97bf3fd PL |
620 | break; |
621 | case TIPC_CMD_GET_MAX_PORTS: | |
4323add6 | 622 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports); |
b97bf3fd PL |
623 | break; |
624 | case TIPC_CMD_GET_MAX_PUBL: | |
4323add6 | 625 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_publications); |
b97bf3fd PL |
626 | break; |
627 | case TIPC_CMD_GET_MAX_SUBSCR: | |
4323add6 | 628 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_subscriptions); |
b97bf3fd PL |
629 | break; |
630 | case TIPC_CMD_GET_MAX_ZONES: | |
4323add6 | 631 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_zones); |
b97bf3fd PL |
632 | break; |
633 | case TIPC_CMD_GET_MAX_CLUSTERS: | |
4323add6 | 634 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_clusters); |
b97bf3fd PL |
635 | break; |
636 | case TIPC_CMD_GET_MAX_NODES: | |
4323add6 | 637 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_nodes); |
b97bf3fd PL |
638 | break; |
639 | case TIPC_CMD_GET_MAX_SLAVES: | |
4323add6 | 640 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_slaves); |
b97bf3fd PL |
641 | break; |
642 | case TIPC_CMD_GET_NETID: | |
4323add6 | 643 | rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id); |
b97bf3fd | 644 | break; |
59f0c452 AS |
645 | case TIPC_CMD_NOT_NET_ADMIN: |
646 | rep_tlv_buf = | |
647 | tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN); | |
648 | break; | |
b97bf3fd | 649 | default: |
53cfd1e1 AS |
650 | rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED |
651 | " (unknown command)"); | |
b97bf3fd PL |
652 | break; |
653 | } | |
654 | ||
655 | /* Return reply buffer */ | |
656 | exit: | |
657 | spin_unlock_bh(&config_lock); | |
658 | return rep_tlv_buf; | |
659 | } | |
660 | ||
661 | static void cfg_named_msg_event(void *userdata, | |
662 | u32 port_ref, | |
663 | struct sk_buff **buf, | |
664 | const unchar *msg, | |
665 | u32 size, | |
c4307285 | 666 | u32 importance, |
b97bf3fd PL |
667 | struct tipc_portid const *orig, |
668 | struct tipc_name_seq const *dest) | |
669 | { | |
670 | struct tipc_cfg_msg_hdr *req_hdr; | |
671 | struct tipc_cfg_msg_hdr *rep_hdr; | |
672 | struct sk_buff *rep_buf; | |
673 | ||
674 | /* Validate configuration message header (ignore invalid message) */ | |
675 | ||
676 | req_hdr = (struct tipc_cfg_msg_hdr *)msg; | |
677 | if ((size < sizeof(*req_hdr)) || | |
678 | (size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) || | |
679 | (ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) { | |
a10bd924 | 680 | warn("Invalid configuration message discarded\n"); |
b97bf3fd PL |
681 | return; |
682 | } | |
683 | ||
684 | /* Generate reply for request (if can't, return request) */ | |
685 | ||
4323add6 | 686 | rep_buf = tipc_cfg_do_cmd(orig->node, |
c4307285 | 687 | ntohs(req_hdr->tcm_type), |
4323add6 PL |
688 | msg + sizeof(*req_hdr), |
689 | size - sizeof(*req_hdr), | |
690 | BUF_HEADROOM + MAX_H_SIZE + sizeof(*rep_hdr)); | |
b97bf3fd PL |
691 | if (rep_buf) { |
692 | skb_push(rep_buf, sizeof(*rep_hdr)); | |
693 | rep_hdr = (struct tipc_cfg_msg_hdr *)rep_buf->data; | |
694 | memcpy(rep_hdr, req_hdr, sizeof(*rep_hdr)); | |
695 | rep_hdr->tcm_len = htonl(rep_buf->len); | |
696 | rep_hdr->tcm_flags &= htons(~TCM_F_REQUEST); | |
697 | } else { | |
698 | rep_buf = *buf; | |
699 | *buf = NULL; | |
700 | } | |
701 | ||
702 | /* NEED TO ADD CODE TO HANDLE FAILED SEND (SUCH AS CONGESTION) */ | |
703 | tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len); | |
704 | } | |
705 | ||
4323add6 | 706 | int tipc_cfg_init(void) |
b97bf3fd PL |
707 | { |
708 | struct tipc_name_seq seq; | |
709 | int res; | |
710 | ||
1fc54d8f | 711 | res = tipc_attach(&mng.user_ref, NULL, NULL); |
b97bf3fd PL |
712 | if (res) |
713 | goto failed; | |
714 | ||
1fc54d8f | 715 | res = tipc_createport(mng.user_ref, NULL, TIPC_CRITICAL_IMPORTANCE, |
b97bf3fd PL |
716 | NULL, NULL, NULL, |
717 | NULL, cfg_named_msg_event, NULL, | |
718 | NULL, &mng.port_ref); | |
719 | if (res) | |
720 | goto failed; | |
721 | ||
722 | seq.type = TIPC_CFG_SRV; | |
723 | seq.lower = seq.upper = tipc_own_addr; | |
4323add6 | 724 | res = tipc_nametbl_publish_rsv(mng.port_ref, TIPC_ZONE_SCOPE, &seq); |
b97bf3fd PL |
725 | if (res) |
726 | goto failed; | |
727 | ||
728 | return 0; | |
729 | ||
730 | failed: | |
731 | err("Unable to create configuration service\n"); | |
732 | tipc_detach(mng.user_ref); | |
733 | mng.user_ref = 0; | |
734 | return res; | |
735 | } | |
736 | ||
4323add6 | 737 | void tipc_cfg_stop(void) |
b97bf3fd PL |
738 | { |
739 | if (mng.user_ref) { | |
740 | tipc_detach(mng.user_ref); | |
741 | mng.user_ref = 0; | |
742 | } | |
743 | } |