2 * net/tipc/config.c: TIPC configuration management code
4 * Copyright (c) 2003-2005, Ericsson Research Canada
5 * Copyright (c) 2004-2005, Wind River Systems
6 * Copyright (c) 2005-2006, Ericsson AB
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
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.
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.
41 #include "name_table.h"
50 struct list_head subd_list;
57 u32 link_subscriptions;
58 struct list_head link_subscribers;
61 static struct manager mng = { 0};
63 static spinlock_t config_lock = SPIN_LOCK_UNLOCKED;
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 */
70 void cfg_link_event(u32 addr, char *name, int up)
72 /* TIPC DOESN'T HANDLE LINK EVENT SUBSCRIPTIONS AT THE MOMENT */
76 struct sk_buff *cfg_reply_alloc(int payload_size)
80 buf = alloc_skb(rep_headroom + payload_size, GFP_ATOMIC);
82 skb_reserve(buf, rep_headroom);
86 int cfg_append_tlv(struct sk_buff *buf, int tlv_type,
87 void *tlv_data, int tlv_data_size)
89 struct tlv_desc *tlv = (struct tlv_desc *)buf->tail;
90 int new_tlv_space = TLV_SPACE(tlv_data_size);
92 if (skb_tailroom(buf) < new_tlv_space) {
93 dbg("cfg_append_tlv unable to append TLV\n");
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);
104 struct sk_buff *cfg_reply_unsigned_type(u16 tlv_type, u32 value)
109 buf = cfg_reply_alloc(TLV_SPACE(sizeof(value)));
111 value_net = htonl(value);
112 cfg_append_tlv(buf, tlv_type, &value_net,
118 struct sk_buff *cfg_reply_string_type(u16 tlv_type, char *string)
121 int string_len = strlen(string) + 1;
123 buf = cfg_reply_alloc(TLV_SPACE(string_len));
125 cfg_append_tlv(buf, tlv_type, string, string_len);
134 /* Now obsolete code for handling commands not yet implemented the new way */
136 int tipc_cfg_cmd(const struct tipc_cmd_msg * msg,
140 struct tipc_portid *orig)
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);
157 tipc_isconnected(mng.conn_port_ref, &connected);
158 if (connected || !orig) {
162 rv = tipc_connect2port(mng.conn_port_ref, orig);
167 case TIPC_GET_PEER_ADDRESS:
168 *ret_size = link_peer_addr(msg->argv.link_name, data, sz);
170 case TIPC_GET_ROUTES:
180 static void cfg_cmd_event(struct tipc_cmd_msg *msg,
183 struct tipc_portid const *orig)
186 struct tipc_cmd_result_msg rmsg;
187 struct iovec msg_sect[2];
190 msg->cmd = ntohl(msg->cmd);
192 cfg_prepare_res_msg(msg->cmd, msg->usr_handle, rv, &rmsg, msg_sect,
194 if (ntohl(msg->magic) != TIPC_MAGIC)
198 case TIPC_CREATE_LINK:
199 if (!cfg_check_connection(orig))
200 rv = disc_create_link(&msg->argv.create_link);
202 case TIPC_LINK_SUBSCRIBE:
204 struct subscr_data *sub;
206 if (mng.link_subscriptions > 64)
208 sub = (struct subscr_data *)kmalloc(sizeof(*sub),
211 warn("Memory squeeze; dropped remote link subscription\n");
214 INIT_LIST_HEAD(&sub->subd_list);
215 tipc_createport(mng.user_ref,
217 TIPC_HIGH_IMPORTANCE,
220 (tipc_conn_shutdown_event)cfg_linksubscr_cancel,
223 (tipc_conn_msg_event)cfg_linksubscr_cancel,
226 if (!sub->port_ref) {
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++;
241 rv = tipc_cfg_cmd(msg, data, sz, (u32 *)&msg_sect[1].iov_len, orig);
244 rmsg.result_len = htonl(msg_sect[1].iov_len);
245 rmsg.retval = htonl(rv);
246 cfg_respond(msg_sect, 2u, orig);
250 static struct sk_buff *cfg_enable_bearer(void)
252 struct tipc_bearer_config *args;
254 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_CONFIG))
255 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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");
263 return cfg_reply_none();
266 static struct sk_buff *cfg_disable_bearer(void)
268 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_BEARER_NAME))
269 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
271 if (tipc_disable_bearer((char *)TLV_DATA(req_tlv_area)))
272 return cfg_reply_error_string("unable to disable bearer");
274 return cfg_reply_none();
277 static struct sk_buff *cfg_set_own_addr(void)
281 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_NET_ADDR))
282 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
284 addr = *(u32 *)TLV_DATA(req_tlv_area);
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
292 return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
293 " (cannot change node address once assigned)");
295 spin_unlock_bh(&config_lock);
297 tipc_own_addr = addr;
299 spin_lock_bh(&config_lock);
300 return cfg_reply_none();
303 static struct sk_buff *cfg_set_remote_mng(void)
307 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
308 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
310 value = *(u32 *)TLV_DATA(req_tlv_area);
311 value = ntohl(value);
312 tipc_remote_management = (value != 0);
313 return cfg_reply_none();
316 static struct sk_buff *cfg_set_max_publications(void)
320 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
321 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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();
332 static struct sk_buff *cfg_set_max_subscriptions(void)
336 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_UNSIGNED))
337 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
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();
348 static struct sk_buff *cfg_set_max_ports(void)
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)");
361 if (value == tipc_max_ports)
362 return cfg_reply_none();
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)");
368 spin_unlock_bh(&config_lock);
369 orig_mode = tipc_get_mode();
370 if (orig_mode == TIPC_NET_MODE)
373 tipc_max_ports = value;
375 if (orig_mode == TIPC_NET_MODE)
377 spin_lock_bh(&config_lock);
378 return cfg_reply_none();
381 static struct sk_buff *set_net_max(int value, int *parameter)
385 if (value != *parameter) {
386 orig_mode = tipc_get_mode();
387 if (orig_mode == TIPC_NET_MODE)
390 if (orig_mode == TIPC_NET_MODE)
394 return cfg_reply_none();
397 static struct sk_buff *cfg_set_max_zones(void)
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);
411 static struct sk_buff *cfg_set_max_clusters(void)
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);
420 return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
421 " (max clusters fixed at 1)");
422 return cfg_reply_none();
425 static struct sk_buff *cfg_set_max_nodes(void)
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);
439 static struct sk_buff *cfg_set_max_slaves(void)
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);
448 return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
449 " (max secondary nodes fixed at 0)");
450 return cfg_reply_none();
453 static struct sk_buff *cfg_set_netid(void)
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)");
466 return cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED
467 " (cannot change network id once part of network)");
469 return set_net_max(value, &tipc_net_id);
472 struct sk_buff *cfg_do_cmd(u32 orig_node, u16 cmd, const void *request_area,
473 int request_space, int reply_headroom)
475 struct sk_buff *rep_tlv_buf;
477 spin_lock_bh(&config_lock);
479 /* Save request and reply details in a well-known location */
481 req_tlv_area = request_area;
482 req_tlv_space = request_space;
483 rep_headroom = reply_headroom;
485 /* Check command authorization */
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)");
493 } else if (!tipc_remote_management) {
494 rep_tlv_buf = cfg_reply_error_string(TIPC_CFG_NO_REMOTE);
497 else if (cmd >= 0x4000) {
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);
507 /* Call appropriate processing routine */
511 rep_tlv_buf = cfg_reply_none();
513 case TIPC_CMD_GET_NODES:
514 rep_tlv_buf = node_get_nodes(req_tlv_area, req_tlv_space);
516 case TIPC_CMD_GET_LINKS:
517 rep_tlv_buf = node_get_links(req_tlv_area, req_tlv_space);
519 case TIPC_CMD_SHOW_LINK_STATS:
520 rep_tlv_buf = link_cmd_show_stats(req_tlv_area, req_tlv_space);
522 case TIPC_CMD_RESET_LINK_STATS:
523 rep_tlv_buf = link_cmd_reset_stats(req_tlv_area, req_tlv_space);
525 case TIPC_CMD_SHOW_NAME_TABLE:
526 rep_tlv_buf = nametbl_get(req_tlv_area, req_tlv_space);
528 case TIPC_CMD_GET_BEARER_NAMES:
529 rep_tlv_buf = bearer_get_names();
531 case TIPC_CMD_GET_MEDIA_NAMES:
532 rep_tlv_buf = media_get_names();
534 case TIPC_CMD_SHOW_PORTS:
535 rep_tlv_buf = port_get_ports();
538 case TIPC_CMD_SHOW_PORT_STATS:
539 rep_tlv_buf = port_show_stats(req_tlv_area, req_tlv_space);
541 case TIPC_CMD_RESET_PORT_STATS:
542 rep_tlv_buf = cfg_reply_error_string(TIPC_CFG_NOT_SUPPORTED);
545 case TIPC_CMD_SET_LOG_SIZE:
546 rep_tlv_buf = log_resize(req_tlv_area, req_tlv_space);
548 case TIPC_CMD_DUMP_LOG:
549 rep_tlv_buf = log_dump();
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);
556 case TIPC_CMD_ENABLE_BEARER:
557 rep_tlv_buf = cfg_enable_bearer();
559 case TIPC_CMD_DISABLE_BEARER:
560 rep_tlv_buf = cfg_disable_bearer();
562 case TIPC_CMD_SET_NODE_ADDR:
563 rep_tlv_buf = cfg_set_own_addr();
565 case TIPC_CMD_SET_REMOTE_MNG:
566 rep_tlv_buf = cfg_set_remote_mng();
568 case TIPC_CMD_SET_MAX_PORTS:
569 rep_tlv_buf = cfg_set_max_ports();
571 case TIPC_CMD_SET_MAX_PUBL:
572 rep_tlv_buf = cfg_set_max_publications();
574 case TIPC_CMD_SET_MAX_SUBSCR:
575 rep_tlv_buf = cfg_set_max_subscriptions();
577 case TIPC_CMD_SET_MAX_ZONES:
578 rep_tlv_buf = cfg_set_max_zones();
580 case TIPC_CMD_SET_MAX_CLUSTERS:
581 rep_tlv_buf = cfg_set_max_clusters();
583 case TIPC_CMD_SET_MAX_NODES:
584 rep_tlv_buf = cfg_set_max_nodes();
586 case TIPC_CMD_SET_MAX_SLAVES:
587 rep_tlv_buf = cfg_set_max_slaves();
589 case TIPC_CMD_SET_NETID:
590 rep_tlv_buf = cfg_set_netid();
592 case TIPC_CMD_GET_REMOTE_MNG:
593 rep_tlv_buf = cfg_reply_unsigned(tipc_remote_management);
595 case TIPC_CMD_GET_MAX_PORTS:
596 rep_tlv_buf = cfg_reply_unsigned(tipc_max_ports);
598 case TIPC_CMD_GET_MAX_PUBL:
599 rep_tlv_buf = cfg_reply_unsigned(tipc_max_publications);
601 case TIPC_CMD_GET_MAX_SUBSCR:
602 rep_tlv_buf = cfg_reply_unsigned(tipc_max_subscriptions);
604 case TIPC_CMD_GET_MAX_ZONES:
605 rep_tlv_buf = cfg_reply_unsigned(tipc_max_zones);
607 case TIPC_CMD_GET_MAX_CLUSTERS:
608 rep_tlv_buf = cfg_reply_unsigned(tipc_max_clusters);
610 case TIPC_CMD_GET_MAX_NODES:
611 rep_tlv_buf = cfg_reply_unsigned(tipc_max_nodes);
613 case TIPC_CMD_GET_MAX_SLAVES:
614 rep_tlv_buf = cfg_reply_unsigned(tipc_max_slaves);
616 case TIPC_CMD_GET_NETID:
617 rep_tlv_buf = cfg_reply_unsigned(tipc_net_id);
624 /* Return reply buffer */
626 spin_unlock_bh(&config_lock);
630 static void cfg_named_msg_event(void *userdata,
632 struct sk_buff **buf,
636 struct tipc_portid const *orig,
637 struct tipc_name_seq const *dest)
639 struct tipc_cfg_msg_hdr *req_hdr;
640 struct tipc_cfg_msg_hdr *rep_hdr;
641 struct sk_buff *rep_buf;
643 /* Validate configuration message header (ignore invalid message) */
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");
653 /* Generate reply for request (if can't, return request) */
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));
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);
671 /* NEED TO ADD CODE TO HANDLE FAILED SEND (SUCH AS CONGESTION) */
672 tipc_send_buf2port(port_ref, orig, rep_buf, rep_buf->len);
677 struct tipc_name_seq seq;
680 memset(&mng, 0, sizeof(mng));
681 INIT_LIST_HEAD(&mng.link_subscribers);
683 res = tipc_attach(&mng.user_ref, 0, 0);
687 res = tipc_createport(mng.user_ref, 0, TIPC_CRITICAL_IMPORTANCE,
689 NULL, cfg_named_msg_event, NULL,
690 NULL, &mng.port_ref);
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);
703 err("Unable to create configuration service\n");
704 tipc_detach(mng.user_ref);
712 tipc_detach(mng.user_ref);