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37#include "core.h"
38#include "port.h"
39#include "name_table.h"
40#include "config.h"
41
42static u32 config_port_ref;
43
44static DEFINE_SPINLOCK(config_lock);
45
46static const void *req_tlv_area;
47static int req_tlv_space;
48static int rep_headroom;
49
50
51struct sk_buff *tipc_cfg_reply_alloc(int payload_size)
52{
53 struct sk_buff *buf;
54
55 buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC);
56 if (buf)
57 skb_reserve(buf, rep_headroom);
58 return buf;
59}
60
61int tipc_cfg_append_tlv(struct sk_buff *buf, int tlv_type,
62 void *tlv_data, int tlv_data_size)
63{
64 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(buf);
65 int new_tlv_space = TLV_SPACE(tlv_data_size);
66
67 if (skb_tailroom(buf) < new_tlv_space)
68 return 0;
69 skb_put(buf, new_tlv_space);
70 tlv->tlv_type = htons(tlv_type);
71 tlv->tlv_len = htons(TLV_LENGTH(tlv_data_size));
72 if (tlv_data_size && tlv_data)
73 memcpy(TLV_DATA(tlv), tlv_data, tlv_data_size);
74 return 1;
75}
76
77static struct sk_buff *tipc_cfg_reply_unsigned_type(u16 tlv_type, u32 value)
78{
79 struct sk_buff *buf;
80 __be32 value_net;
81
82 buf = tipc_cfg_reply_alloc(TLV_SPACE(sizeof(value)));
83 if (buf) {
84 value_net = htonl(value);
85 tipc_cfg_append_tlv(buf, tlv_type, &value_net,
86 sizeof(value_net));
87 }
88 return buf;
89}
90
91static struct sk_buff *tipc_cfg_reply_unsigned(u32 value)
92{
93 return tipc_cfg_reply_unsigned_type(TIPC_TLV_UNSIGNED, value);
94}
95
96struct sk_buff *tipc_cfg_reply_string_type(u16 tlv_type, char *string)
97{
98 struct sk_buff *buf;
99 int string_len = strlen(string) + 1;
100
101 buf = tipc_cfg_reply_alloc(TLV_SPACE(string_len));
102 if (buf)
103 tipc_cfg_append_tlv(buf, tlv_type, string, string_len);
104 return buf;
105}
106
107#define MAX_STATS_INFO 2000
108
109static struct sk_buff *tipc_show_stats(void)
110{
111 struct sk_buff *buf;
112 struct tlv_desc *rep_tlv;
113 struct print_buf pb;
114 int str_len;
115 u32 value;
116
117 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
118 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
119
120 value = ntohl(*(u32 *)TLV_DATA(req_tlv_area));
121 if (value != 0)
122 return tipc_cfg_reply_error_string("unsupported argument");
123
124 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_STATS_INFO));
125 if (buf == NULL)
126 return NULL;
127
128 rep_tlv = (struct tlv_desc *)buf->data;
129 tipc_printbuf_init(&pb, (char *)TLV_DATA(rep_tlv), MAX_STATS_INFO);
130
131 tipc_printf(&pb, "TIPC version " TIPC_MOD_VER "\n");
132
133
134
135 str_len = tipc_printbuf_validate(&pb);
136 skb_put(buf, TLV_SPACE(str_len));
137 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
138
139 return buf;
140}
141
142static struct sk_buff *cfg_enable_bearer(void)
143{
144 struct tipc_bearer_config *args;
145
146 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG))
147 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
148
149 args = (struct tipc_bearer_config *)TLV_DATA(req_tlv_area);
150 if (tipc_enable_bearer(args->name,
151 ntohl(args->disc_domain),
152 ntohl(args->priority)))
153 return tipc_cfg_reply_error_string("unable to enable bearer");
154
155 return tipc_cfg_reply_none();
156}
157
158static struct sk_buff *cfg_disable_bearer(void)
159{
160 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME))
161 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
162
163 if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area)))
164 return tipc_cfg_reply_error_string("unable to disable bearer");
165
166 return tipc_cfg_reply_none();
167}
168
169static struct sk_buff *cfg_set_own_addr(void)
170{
171 u32 addr;
172
173 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
174 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
175
176 addr = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
177 if (addr == tipc_own_addr)
178 return tipc_cfg_reply_none();
179 if (!tipc_addr_node_valid(addr))
180 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
181 " (node address)");
182 if (tipc_mode == TIPC_NET_MODE)
183 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
184 " (cannot change node address once assigned)");
185
186
187
188
189
190
191
192
193
194
195 spin_unlock_bh(&config_lock);
196 tipc_core_start_net(addr);
197 spin_lock_bh(&config_lock);
198 return tipc_cfg_reply_none();
199}
200
201static struct sk_buff *cfg_set_remote_mng(void)
202{
203 u32 value;
204
205 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
206 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
207
208 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
209 tipc_remote_management = (value != 0);
210 return tipc_cfg_reply_none();
211}
212
213static struct sk_buff *cfg_set_max_publications(void)
214{
215 u32 value;
216
217 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
218 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
219
220 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
221 if (value != delimit(value, 1, 65535))
222 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
223 " (max publications must be 1-65535)");
224 tipc_max_publications = value;
225 return tipc_cfg_reply_none();
226}
227
228static struct sk_buff *cfg_set_max_subscriptions(void)
229{
230 u32 value;
231
232 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
233 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
234
235 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
236 if (value != delimit(value, 1, 65535))
237 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
238 " (max subscriptions must be 1-65535");
239 tipc_max_subscriptions = value;
240 return tipc_cfg_reply_none();
241}
242
243static struct sk_buff *cfg_set_max_ports(void)
244{
245 u32 value;
246
247 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
248 return tipc_cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
249 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
250 if (value == tipc_max_ports)
251 return tipc_cfg_reply_none();
252 if (value != delimit(value, 127, 65535))
253 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
254 " (max ports must be 127-65535)");
255 if (tipc_mode != TIPC_NOT_RUNNING)
256 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
257 " (cannot change max ports while TIPC is active)");
258 tipc_max_ports = value;
259 return tipc_cfg_reply_none();
260}
261
262static struct sk_buff *cfg_set_netid(void)
263{
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 value = ntohl(*(__be32 *)TLV_DATA(req_tlv_area));
269 if (value == tipc_net_id)
270 return tipc_cfg_reply_none();
271 if (value != delimit(value, 1, 9999))
272 return tipc_cfg_reply_error_string(TIPC_CFG_INVALID_VALUE
273 " (network id must be 1-9999)");
274 if (tipc_mode == TIPC_NET_MODE)
275 return tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
276 " (cannot change network id once TIPC has joined a network)");
277 tipc_net_id = value;
278 return tipc_cfg_reply_none();
279}
280
281struct sk_buff *tipc_cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area,
282 int request_space, int reply_headroom)
283{
284 struct sk_buff *rep_tlv_buf;
285
286 spin_lock_bh(&config_lock);
287
288
289
290 req_tlv_area = request_area;
291 req_tlv_space = request_space;
292 rep_headroom = reply_headroom;
293
294
295
296 if (likely(orig_node == tipc_own_addr)) {
297
298 } else if (cmd >= 0x8000) {
299 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
300 " (cannot be done remotely)");
301 goto exit;
302 } else if (!tipc_remote_management) {
303 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NO_REMOTE);
304 goto exit;
305 } else if (cmd >= 0x4000) {
306 u32 domain = 0;
307
308 if ((tipc_nametbl_translate(TIPC_ZM_SRV, 0, &domain) == 0) ||
309 (domain != orig_node)) {
310 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_ZONE_MSTR);
311 goto exit;
312 }
313 }
314
315
316
317 switch (cmd) {
318 case TIPC_CMD_NOOP:
319 rep_tlv_buf = tipc_cfg_reply_none();
320 break;
321 case TIPC_CMD_GET_NODES:
322 rep_tlv_buf = tipc_node_get_nodes(req_tlv_area, req_tlv_space);
323 break;
324 case TIPC_CMD_GET_LINKS:
325 rep_tlv_buf = tipc_node_get_links(req_tlv_area, req_tlv_space);
326 break;
327 case TIPC_CMD_SHOW_LINK_STATS:
328 rep_tlv_buf = tipc_link_cmd_show_stats(req_tlv_area, req_tlv_space);
329 break;
330 case TIPC_CMD_RESET_LINK_STATS:
331 rep_tlv_buf = tipc_link_cmd_reset_stats(req_tlv_area, req_tlv_space);
332 break;
333 case TIPC_CMD_SHOW_NAME_TABLE:
334 rep_tlv_buf = tipc_nametbl_get(req_tlv_area, req_tlv_space);
335 break;
336 case TIPC_CMD_GET_BEARER_NAMES:
337 rep_tlv_buf = tipc_bearer_get_names();
338 break;
339 case TIPC_CMD_GET_MEDIA_NAMES:
340 rep_tlv_buf = tipc_media_get_names();
341 break;
342 case TIPC_CMD_SHOW_PORTS:
343 rep_tlv_buf = tipc_port_get_ports();
344 break;
345 case TIPC_CMD_SET_LOG_SIZE:
346 rep_tlv_buf = tipc_log_resize_cmd(req_tlv_area, req_tlv_space);
347 break;
348 case TIPC_CMD_DUMP_LOG:
349 rep_tlv_buf = tipc_log_dump();
350 break;
351 case TIPC_CMD_SHOW_STATS:
352 rep_tlv_buf = tipc_show_stats();
353 break;
354 case TIPC_CMD_SET_LINK_TOL:
355 case TIPC_CMD_SET_LINK_PRI:
356 case TIPC_CMD_SET_LINK_WINDOW:
357 rep_tlv_buf = tipc_link_cmd_config(req_tlv_area, req_tlv_space, cmd);
358 break;
359 case TIPC_CMD_ENABLE_BEARER:
360 rep_tlv_buf = cfg_enable_bearer();
361 break;
362 case TIPC_CMD_DISABLE_BEARER:
363 rep_tlv_buf = cfg_disable_bearer();
364 break;
365 case TIPC_CMD_SET_NODE_ADDR:
366 rep_tlv_buf = cfg_set_own_addr();
367 break;
368 case TIPC_CMD_SET_REMOTE_MNG:
369 rep_tlv_buf = cfg_set_remote_mng();
370 break;
371 case TIPC_CMD_SET_MAX_PORTS:
372 rep_tlv_buf = cfg_set_max_ports();
373 break;
374 case TIPC_CMD_SET_MAX_PUBL:
375 rep_tlv_buf = cfg_set_max_publications();
376 break;
377 case TIPC_CMD_SET_MAX_SUBSCR:
378 rep_tlv_buf = cfg_set_max_subscriptions();
379 break;
380 case TIPC_CMD_SET_NETID:
381 rep_tlv_buf = cfg_set_netid();
382 break;
383 case TIPC_CMD_GET_REMOTE_MNG:
384 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_remote_management);
385 break;
386 case TIPC_CMD_GET_MAX_PORTS:
387 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_ports);
388 break;
389 case TIPC_CMD_GET_MAX_PUBL:
390 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_publications);
391 break;
392 case TIPC_CMD_GET_MAX_SUBSCR:
393 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_max_subscriptions);
394 break;
395 case TIPC_CMD_GET_NETID:
396 rep_tlv_buf = tipc_cfg_reply_unsigned(tipc_net_id);
397 break;
398 case TIPC_CMD_NOT_NET_ADMIN:
399 rep_tlv_buf =
400 tipc_cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
401 break;
402 case TIPC_CMD_SET_MAX_ZONES:
403 case TIPC_CMD_GET_MAX_ZONES:
404 case TIPC_CMD_SET_MAX_SLAVES:
405 case TIPC_CMD_GET_MAX_SLAVES:
406 case TIPC_CMD_SET_MAX_CLUSTERS:
407 case TIPC_CMD_GET_MAX_CLUSTERS:
408 case TIPC_CMD_SET_MAX_NODES:
409 case TIPC_CMD_GET_MAX_NODES:
410 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
411 " (obsolete command)");
412 break;
413 default:
414 rep_tlv_buf = tipc_cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
415 " (unknown command)");
416 break;
417 }
418
419
420exit:
421 spin_unlock_bh(&config_lock);
422 return rep_tlv_buf;
423}
424
425static void cfg_named_msg_event(void *userdata,
426 u32 port_ref,
427 struct sk_buff **buf,
428 const unchar *msg,
429 u32 size,
430 u32 importance,
431 struct tipc_portid const *orig,
432 struct tipc_name_seq const *dest)
433{
434 struct tipc_cfg_msg_hdr *req_hdr;
435 struct tipc_cfg_msg_hdr *rep_hdr;
436 struct sk_buff *rep_buf;
437
438
439
440 req_hdr = (struct tipc_cfg_msg_hdr *)msg;
441 if ((size < sizeof(*req_hdr)) ||
442 (size != TCM_ALIGN(ntohl(req_hdr->tcm_len))) ||
443 (ntohs(req_hdr->tcm_flags) != TCM_F_REQUEST)) {
444 warn("Invalid configuration message discarded\n");
445 return;
446 }
447
448
449
450 rep_buf = tipc_cfg_do_cmd(orig->node,
451 ntohs(req_hdr->tcm_type),
452 msg + sizeof(*req_hdr),
453 size - sizeof(*req_hdr),
454 BUF_HEADROOM + MAX_H_SIZE + sizeof(*rep_hdr));
455 if (rep_buf) {
456 skb_push(rep_buf, sizeof(*rep_hdr));
457 rep_hdr = (struct tipc_cfg_msg_hdr *)rep_buf->data;
458 memcpy(rep_hdr, req_hdr, sizeof(*rep_hdr));
459 rep_hdr->tcm_len = htonl(rep_buf->len);
460 rep_hdr->tcm_flags &= htons(~TCM_F_REQUEST);
461 } else {
462 rep_buf = *buf;
463 *buf = NULL;
464 }
465
466
467 tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len);
468}
469
470int tipc_cfg_init(void)
471{
472 struct tipc_name_seq seq;
473 int res;
474
475 res = tipc_createport(NULL, TIPC_CRITICAL_IMPORTANCE,
476 NULL, NULL, NULL,
477 NULL, cfg_named_msg_event, NULL,
478 NULL, &config_port_ref);
479 if (res)
480 goto failed;
481
482 seq.type = TIPC_CFG_SRV;
483 seq.lower = seq.upper = tipc_own_addr;
484 res = tipc_nametbl_publish_rsv(config_port_ref, TIPC_ZONE_SCOPE, &seq);
485 if (res)
486 goto failed;
487
488 return 0;
489
490failed:
491 err("Unable to create configuration service\n");
492 return res;
493}
494
495void tipc_cfg_stop(void)
496{
497 if (config_port_ref) {
498 tipc_deleteport(config_port_ref);
499 config_port_ref = 0;
500 }
501}
502