aboutsummaryrefslogtreecommitdiffstats
path: root/net/tipc/config.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/tipc/config.c')
-rw-r--r--net/tipc/config.c715
1 files changed, 715 insertions, 0 deletions
diff --git a/net/tipc/config.c b/net/tipc/config.c
new file mode 100644
index 000000000000..0f31c342d11c
--- /dev/null
+++ b/net/tipc/config.c
@@ -0,0 +1,715 @@
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
46struct subscr_data {
47 char usr_handle[8];
48 u32 domain;
49 u32 port_ref;
50 struct list_head subd_list;
51};
52
53struct 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
61static struct manager mng = { 0};
62
63static spinlock_t config_lock = SPIN_LOCK_UNLOCKED;
64
65static const void *req_tlv_area; /* request message TLV area */
66static int req_tlv_space; /* request message TLV area size */
67static int rep_headroom; /* reply message headroom to use */
68
69
70void cfg_link_event(u32 addr, char *name, int up)
71{
72 /* TIPC DOESN'T HANDLE LINK EVENT SUBSCRIPTIONS AT THE MOMENT */
73}
74
75
76struct 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
86int 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
104struct 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
118struct 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
136int 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
180static 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
250static 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
266static 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
277static 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
303static 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
316static 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
332static 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
348static 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
381static 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
397static 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
411static 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
425static 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
439static 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
453static 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
472struct 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 */
625exit:
626 spin_unlock_bh(&config_lock);
627 return rep_tlv_buf;
628}
629
630static 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
675int 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
702failed:
703 err("Unable to create configuration service\n");
704 tipc_detach(mng.user_ref);
705 mng.user_ref = 0;
706 return res;
707}
708
709void cfg_stop(void)
710{
711 if (mng.user_ref) {
712 tipc_detach(mng.user_ref);
713 mng.user_ref = 0;
714 }
715}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 23:57:56 -0500