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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / net / tipc / port.c
blobcd3837111e2dc4c9e65b9739e75f6d44da9471b1
1 /*
2 * net/tipc/port.c: TIPC port code
3 *
4 * Copyright (c) 1992-2007, Ericsson AB
5 * Copyright (c) 2004-2008, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
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.
19 *
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
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 #include "core.h"
38 #include "config.h"
39 #include "dbg.h"
40 #include "port.h"
41 #include "addr.h"
42 #include "link.h"
43 #include "node.h"
44 #include "name_table.h"
45 #include "user_reg.h"
46 #include "msg.h"
47 #include "bcast.h"
48
49 /* Connection management: */
50 #define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
51 #define CONFIRMED 0
52 #define PROBING 1
53
54 #define MAX_REJECT_SIZE 1024
55
56 static struct sk_buff *msg_queue_head = NULL;
57 static struct sk_buff *msg_queue_tail = NULL;
58
59 DEFINE_SPINLOCK(tipc_port_list_lock);
60 static DEFINE_SPINLOCK(queue_lock);
61
62 static LIST_HEAD(ports);
63 static void port_handle_node_down(unsigned long ref);
64 static struct sk_buff* port_build_self_abort_msg(struct port *,u32 err);
65 static struct sk_buff* port_build_peer_abort_msg(struct port *,u32 err);
66 static void port_timeout(unsigned long ref);
67
68
69 static u32 port_peernode(struct port *p_ptr)
70 {
71 return msg_destnode(&p_ptr->publ.phdr);
72 }
73
74 static u32 port_peerport(struct port *p_ptr)
75 {
76 return msg_destport(&p_ptr->publ.phdr);
77 }
78
79 static u32 port_out_seqno(struct port *p_ptr)
80 {
81 return msg_transp_seqno(&p_ptr->publ.phdr);
82 }
83
84 static void port_incr_out_seqno(struct port *p_ptr)
85 {
86 struct tipc_msg *m = &p_ptr->publ.phdr;
87
88 if (likely(!msg_routed(m)))
89 return;
90 msg_set_transp_seqno(m, (msg_transp_seqno(m) + 1));
91 }
92
93 /**
94 * tipc_multicast - send a multicast message to local and remote destinations
95 */
96
97 int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, u32 domain,
98 u32 num_sect, struct iovec const *msg_sect)
99 {
100 struct tipc_msg *hdr;
101 struct sk_buff *buf;
102 struct sk_buff *ibuf = NULL;
103 struct port_list dports = {0, NULL, };
104 struct port *oport = tipc_port_deref(ref);
105 int ext_targets;
106 int res;
107
108 if (unlikely(!oport))
109 return -EINVAL;
110
111 /* Create multicast message */
112
113 hdr = &oport->publ.phdr;
114 msg_set_type(hdr, TIPC_MCAST_MSG);
115 msg_set_nametype(hdr, seq->type);
116 msg_set_namelower(hdr, seq->lower);
117 msg_set_nameupper(hdr, seq->upper);
118 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
119 res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
120 !oport->user_port, &buf);
121 if (unlikely(!buf))
122 return res;
123
124 /* Figure out where to send multicast message */
125
126 ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
127 TIPC_NODE_SCOPE, &dports);
128
129 /* Send message to destinations (duplicate it only if necessary) */
130
131 if (ext_targets) {
132 if (dports.count != 0) {
133 ibuf = skb_copy(buf, GFP_ATOMIC);
134 if (ibuf == NULL) {
135 tipc_port_list_free(&dports);
136 buf_discard(buf);
137 return -ENOMEM;
138 }
139 }
140 res = tipc_bclink_send_msg(buf);
141 if ((res < 0) && (dports.count != 0)) {
142 buf_discard(ibuf);
143 }
144 } else {
145 ibuf = buf;
146 }
147
148 if (res >= 0) {
149 if (ibuf)
150 tipc_port_recv_mcast(ibuf, &dports);
151 } else {
152 tipc_port_list_free(&dports);
153 }
154 return res;
155 }
156
157 /**
158 * tipc_port_recv_mcast - deliver multicast message to all destination ports
159 *
160 * If there is no port list, perform a lookup to create one
161 */
162
163 void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
164 {
165 struct tipc_msg* msg;
166 struct port_list dports = {0, NULL, };
167 struct port_list *item = dp;
168 int cnt = 0;
169
170 msg = buf_msg(buf);
171
172 /* Create destination port list, if one wasn't supplied */
173
174 if (dp == NULL) {
175 tipc_nametbl_mc_translate(msg_nametype(msg),
176 msg_namelower(msg),
177 msg_nameupper(msg),
178 TIPC_CLUSTER_SCOPE,
179 &dports);
180 item = dp = &dports;
181 }
182
183 /* Deliver a copy of message to each destination port */
184
185 if (dp->count != 0) {
186 if (dp->count == 1) {
187 msg_set_destport(msg, dp->ports[0]);
188 tipc_port_recv_msg(buf);
189 tipc_port_list_free(dp);
190 return;
191 }
192 for (; cnt < dp->count; cnt++) {
193 int index = cnt % PLSIZE;
194 struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
195
196 if (b == NULL) {
197 warn("Unable to deliver multicast message(s)\n");
198 msg_dbg(msg, "LOST:");
199 goto exit;
200 }
201 if ((index == 0) && (cnt != 0)) {
202 item = item->next;
203 }
204 msg_set_destport(buf_msg(b),item->ports[index]);
205 tipc_port_recv_msg(b);
206 }
207 }
208 exit:
209 buf_discard(buf);
210 tipc_port_list_free(dp);
211 }
212
213 /**
214 * tipc_createport_raw - create a generic TIPC port
215 *
216 * Returns pointer to (locked) TIPC port, or NULL if unable to create it
217 */
218
219 struct tipc_port *tipc_createport_raw(void *usr_handle,
220 u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
221 void (*wakeup)(struct tipc_port *),
222 const u32 importance)
223 {
224 struct port *p_ptr;
225 struct tipc_msg *msg;
226 u32 ref;
227
228 p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
229 if (!p_ptr) {
230 warn("Port creation failed, no memory\n");
231 return NULL;
232 }
233 ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
234 if (!ref) {
235 warn("Port creation failed, reference table exhausted\n");
236 kfree(p_ptr);
237 return NULL;
238 }
239
240 p_ptr->publ.usr_handle = usr_handle;
241 p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
242 p_ptr->publ.ref = ref;
243 msg = &p_ptr->publ.phdr;
244 tipc_msg_init(msg, importance, TIPC_NAMED_MSG, LONG_H_SIZE, 0);
245 msg_set_origport(msg, ref);
246 p_ptr->last_in_seqno = 41;
247 p_ptr->sent = 1;
248 INIT_LIST_HEAD(&p_ptr->wait_list);
249 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
250 p_ptr->dispatcher = dispatcher;
251 p_ptr->wakeup = wakeup;
252 p_ptr->user_port = NULL;
253 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
254 spin_lock_bh(&tipc_port_list_lock);
255 INIT_LIST_HEAD(&p_ptr->publications);
256 INIT_LIST_HEAD(&p_ptr->port_list);
257 list_add_tail(&p_ptr->port_list, &ports);
258 spin_unlock_bh(&tipc_port_list_lock);
259 return &(p_ptr->publ);
260 }
261
262 int tipc_deleteport(u32 ref)
263 {
264 struct port *p_ptr;
265 struct sk_buff *buf = NULL;
266
267 tipc_withdraw(ref, 0, NULL);
268 p_ptr = tipc_port_lock(ref);
269 if (!p_ptr)
270 return -EINVAL;
271
272 tipc_ref_discard(ref);
273 tipc_port_unlock(p_ptr);
274
275 k_cancel_timer(&p_ptr->timer);
276 if (p_ptr->publ.connected) {
277 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
278 tipc_nodesub_unsubscribe(&p_ptr->subscription);
279 }
280 if (p_ptr->user_port) {
281 tipc_reg_remove_port(p_ptr->user_port);
282 kfree(p_ptr->user_port);
283 }
284
285 spin_lock_bh(&tipc_port_list_lock);
286 list_del(&p_ptr->port_list);
287 list_del(&p_ptr->wait_list);
288 spin_unlock_bh(&tipc_port_list_lock);
289 k_term_timer(&p_ptr->timer);
290 kfree(p_ptr);
291 dbg("Deleted port %u\n", ref);
292 tipc_net_route_msg(buf);
293 return 0;
294 }
295
296 /**
297 * tipc_get_port() - return port associated with 'ref'
298 *
299 * Note: Port is not locked.
300 */
301
302 struct tipc_port *tipc_get_port(const u32 ref)
303 {
304 return (struct tipc_port *)tipc_ref_deref(ref);
305 }
306
307 /**
308 * tipc_get_handle - return user handle associated to port 'ref'
309 */
310
311 void *tipc_get_handle(const u32 ref)
312 {
313 struct port *p_ptr;
314 void * handle;
315
316 p_ptr = tipc_port_lock(ref);
317 if (!p_ptr)
318 return NULL;
319 handle = p_ptr->publ.usr_handle;
320 tipc_port_unlock(p_ptr);
321 return handle;
322 }
323
324 static int port_unreliable(struct port *p_ptr)
325 {
326 return msg_src_droppable(&p_ptr->publ.phdr);
327 }
328
329 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
330 {
331 struct port *p_ptr;
332
333 p_ptr = tipc_port_lock(ref);
334 if (!p_ptr)
335 return -EINVAL;
336 *isunreliable = port_unreliable(p_ptr);
337 tipc_port_unlock(p_ptr);
338 return 0;
339 }
340
341 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
342 {
343 struct port *p_ptr;
344
345 p_ptr = tipc_port_lock(ref);
346 if (!p_ptr)
347 return -EINVAL;
348 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
349 tipc_port_unlock(p_ptr);
350 return 0;
351 }
352
353 static int port_unreturnable(struct port *p_ptr)
354 {
355 return msg_dest_droppable(&p_ptr->publ.phdr);
356 }
357
358 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
359 {
360 struct port *p_ptr;
361
362 p_ptr = tipc_port_lock(ref);
363 if (!p_ptr)
364 return -EINVAL;
365 *isunrejectable = port_unreturnable(p_ptr);
366 tipc_port_unlock(p_ptr);
367 return 0;
368 }
369
370 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
371 {
372 struct port *p_ptr;
373
374 p_ptr = tipc_port_lock(ref);
375 if (!p_ptr)
376 return -EINVAL;
377 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
378 tipc_port_unlock(p_ptr);
379 return 0;
380 }
381
382 /*
383 * port_build_proto_msg(): build a port level protocol
384 * or a connection abortion message. Called with
385 * tipc_port lock on.
386 */
387 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
388 u32 origport, u32 orignode,
389 u32 usr, u32 type, u32 err,
390 u32 seqno, u32 ack)
391 {
392 struct sk_buff *buf;
393 struct tipc_msg *msg;
394
395 buf = buf_acquire(LONG_H_SIZE);
396 if (buf) {
397 msg = buf_msg(buf);
398 tipc_msg_init(msg, usr, type, LONG_H_SIZE, destnode);
399 msg_set_errcode(msg, err);
400 msg_set_destport(msg, destport);
401 msg_set_origport(msg, origport);
402 msg_set_orignode(msg, orignode);
403 msg_set_transp_seqno(msg, seqno);
404 msg_set_msgcnt(msg, ack);
405 msg_dbg(msg, "PORT>SEND>:");
406 }
407 return buf;
408 }
409
410 int tipc_reject_msg(struct sk_buff *buf, u32 err)
411 {
412 struct tipc_msg *msg = buf_msg(buf);
413 struct sk_buff *rbuf;
414 struct tipc_msg *rmsg;
415 int hdr_sz;
416 u32 imp = msg_importance(msg);
417 u32 data_sz = msg_data_sz(msg);
418
419 if (data_sz > MAX_REJECT_SIZE)
420 data_sz = MAX_REJECT_SIZE;
421 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
422 imp++;
423 msg_dbg(msg, "port->rej: ");
424
425 /* discard rejected message if it shouldn't be returned to sender */
426 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
427 buf_discard(buf);
428 return data_sz;
429 }
430
431 /* construct rejected message */
432 if (msg_mcast(msg))
433 hdr_sz = MCAST_H_SIZE;
434 else
435 hdr_sz = LONG_H_SIZE;
436 rbuf = buf_acquire(data_sz + hdr_sz);
437 if (rbuf == NULL) {
438 buf_discard(buf);
439 return data_sz;
440 }
441 rmsg = buf_msg(rbuf);
442 tipc_msg_init(rmsg, imp, msg_type(msg), hdr_sz, msg_orignode(msg));
443 msg_set_errcode(rmsg, err);
444 msg_set_destport(rmsg, msg_origport(msg));
445 msg_set_origport(rmsg, msg_destport(msg));
446 if (msg_short(msg)) {
447 msg_set_orignode(rmsg, tipc_own_addr);
448 /* leave name type & instance as zeroes */
449 } else {
450 msg_set_orignode(rmsg, msg_destnode(msg));
451 msg_set_nametype(rmsg, msg_nametype(msg));
452 msg_set_nameinst(rmsg, msg_nameinst(msg));
453 }
454 msg_set_size(rmsg, data_sz + hdr_sz);
455 skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
456
457 /* send self-abort message when rejecting on a connected port */
458 if (msg_connected(msg)) {
459 struct sk_buff *abuf = NULL;
460 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
461
462 if (p_ptr) {
463 if (p_ptr->publ.connected)
464 abuf = port_build_self_abort_msg(p_ptr, err);
465 tipc_port_unlock(p_ptr);
466 }
467 tipc_net_route_msg(abuf);
468 }
469
470 /* send rejected message */
471 buf_discard(buf);
472 tipc_net_route_msg(rbuf);
473 return data_sz;
474 }
475
476 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
477 struct iovec const *msg_sect, u32 num_sect,
478 int err)
479 {
480 struct sk_buff *buf;
481 int res;
482
483 res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
484 !p_ptr->user_port, &buf);
485 if (!buf)
486 return res;
487
488 return tipc_reject_msg(buf, err);
489 }
490
491 static void port_timeout(unsigned long ref)
492 {
493 struct port *p_ptr = tipc_port_lock(ref);
494 struct sk_buff *buf = NULL;
495
496 if (!p_ptr)
497 return;
498
499 if (!p_ptr->publ.connected) {
500 tipc_port_unlock(p_ptr);
501 return;
502 }
503
504 /* Last probe answered ? */
505 if (p_ptr->probing_state == PROBING) {
506 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
507 } else {
508 buf = port_build_proto_msg(port_peerport(p_ptr),
509 port_peernode(p_ptr),
510 p_ptr->publ.ref,
511 tipc_own_addr,
512 CONN_MANAGER,
513 CONN_PROBE,
514 TIPC_OK,
515 port_out_seqno(p_ptr),
516 0);
517 port_incr_out_seqno(p_ptr);
518 p_ptr->probing_state = PROBING;
519 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
520 }
521 tipc_port_unlock(p_ptr);
522 tipc_net_route_msg(buf);
523 }
524
525
526 static void port_handle_node_down(unsigned long ref)
527 {
528 struct port *p_ptr = tipc_port_lock(ref);
529 struct sk_buff* buf = NULL;
530
531 if (!p_ptr)
532 return;
533 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
534 tipc_port_unlock(p_ptr);
535 tipc_net_route_msg(buf);
536 }
537
538
539 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
540 {
541 u32 imp = msg_importance(&p_ptr->publ.phdr);
542
543 if (!p_ptr->publ.connected)
544 return NULL;
545 if (imp < TIPC_CRITICAL_IMPORTANCE)
546 imp++;
547 return port_build_proto_msg(p_ptr->publ.ref,
548 tipc_own_addr,
549 port_peerport(p_ptr),
550 port_peernode(p_ptr),
551 imp,
552 TIPC_CONN_MSG,
553 err,
554 p_ptr->last_in_seqno + 1,
555 0);
556 }
557
558
559 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
560 {
561 u32 imp = msg_importance(&p_ptr->publ.phdr);
562
563 if (!p_ptr->publ.connected)
564 return NULL;
565 if (imp < TIPC_CRITICAL_IMPORTANCE)
566 imp++;
567 return port_build_proto_msg(port_peerport(p_ptr),
568 port_peernode(p_ptr),
569 p_ptr->publ.ref,
570 tipc_own_addr,
571 imp,
572 TIPC_CONN_MSG,
573 err,
574 port_out_seqno(p_ptr),
575 0);
576 }
577
578 void tipc_port_recv_proto_msg(struct sk_buff *buf)
579 {
580 struct tipc_msg *msg = buf_msg(buf);
581 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
582 u32 err = TIPC_OK;
583 struct sk_buff *r_buf = NULL;
584 struct sk_buff *abort_buf = NULL;
585
586 msg_dbg(msg, "PORT<RECV<:");
587
588 if (!p_ptr) {
589 err = TIPC_ERR_NO_PORT;
590 } else if (p_ptr->publ.connected) {
591 if (port_peernode(p_ptr) != msg_orignode(msg))
592 err = TIPC_ERR_NO_PORT;
593 if (port_peerport(p_ptr) != msg_origport(msg))
594 err = TIPC_ERR_NO_PORT;
595 if (!err && msg_routed(msg)) {
596 u32 seqno = msg_transp_seqno(msg);
597 u32 myno = ++p_ptr->last_in_seqno;
598 if (seqno != myno) {
599 err = TIPC_ERR_NO_PORT;
600 abort_buf = port_build_self_abort_msg(p_ptr, err);
601 }
602 }
603 if (msg_type(msg) == CONN_ACK) {
604 int wakeup = tipc_port_congested(p_ptr) &&
605 p_ptr->publ.congested &&
606 p_ptr->wakeup;
607 p_ptr->acked += msg_msgcnt(msg);
608 if (tipc_port_congested(p_ptr))
609 goto exit;
610 p_ptr->publ.congested = 0;
611 if (!wakeup)
612 goto exit;
613 p_ptr->wakeup(&p_ptr->publ);
614 goto exit;
615 }
616 } else if (p_ptr->publ.published) {
617 err = TIPC_ERR_NO_PORT;
618 }
619 if (err) {
620 r_buf = port_build_proto_msg(msg_origport(msg),
621 msg_orignode(msg),
622 msg_destport(msg),
623 tipc_own_addr,
624 TIPC_HIGH_IMPORTANCE,
625 TIPC_CONN_MSG,
626 err,
627 0,
628 0);
629 goto exit;
630 }
631
632 /* All is fine */
633 if (msg_type(msg) == CONN_PROBE) {
634 r_buf = port_build_proto_msg(msg_origport(msg),
635 msg_orignode(msg),
636 msg_destport(msg),
637 tipc_own_addr,
638 CONN_MANAGER,
639 CONN_PROBE_REPLY,
640 TIPC_OK,
641 port_out_seqno(p_ptr),
642 0);
643 }
644 p_ptr->probing_state = CONFIRMED;
645 port_incr_out_seqno(p_ptr);
646 exit:
647 if (p_ptr)
648 tipc_port_unlock(p_ptr);
649 tipc_net_route_msg(r_buf);
650 tipc_net_route_msg(abort_buf);
651 buf_discard(buf);
652 }
653
654 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
655 {
656 struct publication *publ;
657
658 if (full_id)
659 tipc_printf(buf, "<%u.%u.%u:%u>:",
660 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
661 tipc_node(tipc_own_addr), p_ptr->publ.ref);
662 else
663 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
664
665 if (p_ptr->publ.connected) {
666 u32 dport = port_peerport(p_ptr);
667 u32 destnode = port_peernode(p_ptr);
668
669 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
670 tipc_zone(destnode), tipc_cluster(destnode),
671 tipc_node(destnode), dport);
672 if (p_ptr->publ.conn_type != 0)
673 tipc_printf(buf, " via {%u,%u}",
674 p_ptr->publ.conn_type,
675 p_ptr->publ.conn_instance);
676 }
677 else if (p_ptr->publ.published) {
678 tipc_printf(buf, " bound to");
679 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
680 if (publ->lower == publ->upper)
681 tipc_printf(buf, " {%u,%u}", publ->type,
682 publ->lower);
683 else
684 tipc_printf(buf, " {%u,%u,%u}", publ->type,
685 publ->lower, publ->upper);
686 }
687 }
688 tipc_printf(buf, "\n");
689 }
690
691 #define MAX_PORT_QUERY 32768
692
693 struct sk_buff *tipc_port_get_ports(void)
694 {
695 struct sk_buff *buf;
696 struct tlv_desc *rep_tlv;
697 struct print_buf pb;
698 struct port *p_ptr;
699 int str_len;
700
701 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
702 if (!buf)
703 return NULL;
704 rep_tlv = (struct tlv_desc *)buf->data;
705
706 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
707 spin_lock_bh(&tipc_port_list_lock);
708 list_for_each_entry(p_ptr, &ports, port_list) {
709 spin_lock_bh(p_ptr->publ.lock);
710 port_print(p_ptr, &pb, 0);
711 spin_unlock_bh(p_ptr->publ.lock);
712 }
713 spin_unlock_bh(&tipc_port_list_lock);
714 str_len = tipc_printbuf_validate(&pb);
715
716 skb_put(buf, TLV_SPACE(str_len));
717 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
718
719 return buf;
720 }
721
722
723 void tipc_port_reinit(void)
724 {
725 struct port *p_ptr;
726 struct tipc_msg *msg;
727
728 spin_lock_bh(&tipc_port_list_lock);
729 list_for_each_entry(p_ptr, &ports, port_list) {
730 msg = &p_ptr->publ.phdr;
731 if (msg_orignode(msg) == tipc_own_addr)
732 break;
733 msg_set_prevnode(msg, tipc_own_addr);
734 msg_set_orignode(msg, tipc_own_addr);
735 }
736 spin_unlock_bh(&tipc_port_list_lock);
737 }
738
739
740 /*
741 * port_dispatcher_sigh(): Signal handler for messages destinated
742 * to the tipc_port interface.
743 */
744
745 static void port_dispatcher_sigh(void *dummy)
746 {
747 struct sk_buff *buf;
748
749 spin_lock_bh(&queue_lock);
750 buf = msg_queue_head;
751 msg_queue_head = NULL;
752 spin_unlock_bh(&queue_lock);
753
754 while (buf) {
755 struct port *p_ptr;
756 struct user_port *up_ptr;
757 struct tipc_portid orig;
758 struct tipc_name_seq dseq;
759 void *usr_handle;
760 int connected;
761 int published;
762 u32 message_type;
763
764 struct sk_buff *next = buf->next;
765 struct tipc_msg *msg = buf_msg(buf);
766 u32 dref = msg_destport(msg);
767
768 message_type = msg_type(msg);
769 if (message_type > TIPC_DIRECT_MSG)
770 goto reject; /* Unsupported message type */
771
772 p_ptr = tipc_port_lock(dref);
773 if (!p_ptr)
774 goto reject; /* Port deleted while msg in queue */
775
776 orig.ref = msg_origport(msg);
777 orig.node = msg_orignode(msg);
778 up_ptr = p_ptr->user_port;
779 usr_handle = up_ptr->usr_handle;
780 connected = p_ptr->publ.connected;
781 published = p_ptr->publ.published;
782
783 if (unlikely(msg_errcode(msg)))
784 goto err;
785
786 switch (message_type) {
787
788 case TIPC_CONN_MSG:{
789 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
790 u32 peer_port = port_peerport(p_ptr);
791 u32 peer_node = port_peernode(p_ptr);
792
793 tipc_port_unlock(p_ptr);
794 if (unlikely(!cb))
795 goto reject;
796 if (unlikely(!connected)) {
797 if (tipc_connect2port(dref, &orig))
798 goto reject;
799 } else if ((msg_origport(msg) != peer_port) ||
800 (msg_orignode(msg) != peer_node))
801 goto reject;
802 if (unlikely(++p_ptr->publ.conn_unacked >=
803 TIPC_FLOW_CONTROL_WIN))
804 tipc_acknowledge(dref,
805 p_ptr->publ.conn_unacked);
806 skb_pull(buf, msg_hdr_sz(msg));
807 cb(usr_handle, dref, &buf, msg_data(msg),
808 msg_data_sz(msg));
809 break;
810 }
811 case TIPC_DIRECT_MSG:{
812 tipc_msg_event cb = up_ptr->msg_cb;
813
814 tipc_port_unlock(p_ptr);
815 if (unlikely(!cb || connected))
816 goto reject;
817 skb_pull(buf, msg_hdr_sz(msg));
818 cb(usr_handle, dref, &buf, msg_data(msg),
819 msg_data_sz(msg), msg_importance(msg),
820 &orig);
821 break;
822 }
823 case TIPC_MCAST_MSG:
824 case TIPC_NAMED_MSG:{
825 tipc_named_msg_event cb = up_ptr->named_msg_cb;
826
827 tipc_port_unlock(p_ptr);
828 if (unlikely(!cb || connected || !published))
829 goto reject;
830 dseq.type = msg_nametype(msg);
831 dseq.lower = msg_nameinst(msg);
832 dseq.upper = (message_type == TIPC_NAMED_MSG)
833 ? dseq.lower : msg_nameupper(msg);
834 skb_pull(buf, msg_hdr_sz(msg));
835 cb(usr_handle, dref, &buf, msg_data(msg),
836 msg_data_sz(msg), msg_importance(msg),
837 &orig, &dseq);
838 break;
839 }
840 }
841 if (buf)
842 buf_discard(buf);
843 buf = next;
844 continue;
845 err:
846 switch (message_type) {
847
848 case TIPC_CONN_MSG:{
849 tipc_conn_shutdown_event cb =
850 up_ptr->conn_err_cb;
851 u32 peer_port = port_peerport(p_ptr);
852 u32 peer_node = port_peernode(p_ptr);
853
854 tipc_port_unlock(p_ptr);
855 if (!cb || !connected)
856 break;
857 if ((msg_origport(msg) != peer_port) ||
858 (msg_orignode(msg) != peer_node))
859 break;
860 tipc_disconnect(dref);
861 skb_pull(buf, msg_hdr_sz(msg));
862 cb(usr_handle, dref, &buf, msg_data(msg),
863 msg_data_sz(msg), msg_errcode(msg));
864 break;
865 }
866 case TIPC_DIRECT_MSG:{
867 tipc_msg_err_event cb = up_ptr->err_cb;
868
869 tipc_port_unlock(p_ptr);
870 if (!cb || connected)
871 break;
872 skb_pull(buf, msg_hdr_sz(msg));
873 cb(usr_handle, dref, &buf, msg_data(msg),
874 msg_data_sz(msg), msg_errcode(msg), &orig);
875 break;
876 }
877 case TIPC_MCAST_MSG:
878 case TIPC_NAMED_MSG:{
879 tipc_named_msg_err_event cb =
880 up_ptr->named_err_cb;
881
882 tipc_port_unlock(p_ptr);
883 if (!cb || connected)
884 break;
885 dseq.type = msg_nametype(msg);
886 dseq.lower = msg_nameinst(msg);
887 dseq.upper = (message_type == TIPC_NAMED_MSG)
888 ? dseq.lower : msg_nameupper(msg);
889 skb_pull(buf, msg_hdr_sz(msg));
890 cb(usr_handle, dref, &buf, msg_data(msg),
891 msg_data_sz(msg), msg_errcode(msg), &dseq);
892 break;
893 }
894 }
895 if (buf)
896 buf_discard(buf);
897 buf = next;
898 continue;
899 reject:
900 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
901 buf = next;
902 }
903 }
904
905 /*
906 * port_dispatcher(): Dispatcher for messages destinated
907 * to the tipc_port interface. Called with port locked.
908 */
909
910 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
911 {
912 buf->next = NULL;
913 spin_lock_bh(&queue_lock);
914 if (msg_queue_head) {
915 msg_queue_tail->next = buf;
916 msg_queue_tail = buf;
917 } else {
918 msg_queue_tail = msg_queue_head = buf;
919 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
920 }
921 spin_unlock_bh(&queue_lock);
922 return 0;
923 }
924
925 /*
926 * Wake up port after congestion: Called with port locked,
927 *
928 */
929
930 static void port_wakeup_sh(unsigned long ref)
931 {
932 struct port *p_ptr;
933 struct user_port *up_ptr;
934 tipc_continue_event cb = NULL;
935 void *uh = NULL;
936
937 p_ptr = tipc_port_lock(ref);
938 if (p_ptr) {
939 up_ptr = p_ptr->user_port;
940 if (up_ptr) {
941 cb = up_ptr->continue_event_cb;
942 uh = up_ptr->usr_handle;
943 }
944 tipc_port_unlock(p_ptr);
945 }
946 if (cb)
947 cb(uh, ref);
948 }
949
950
951 static void port_wakeup(struct tipc_port *p_ptr)
952 {
953 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
954 }
955
956 void tipc_acknowledge(u32 ref, u32 ack)
957 {
958 struct port *p_ptr;
959 struct sk_buff *buf = NULL;
960
961 p_ptr = tipc_port_lock(ref);
962 if (!p_ptr)
963 return;
964 if (p_ptr->publ.connected) {
965 p_ptr->publ.conn_unacked -= ack;
966 buf = port_build_proto_msg(port_peerport(p_ptr),
967 port_peernode(p_ptr),
968 ref,
969 tipc_own_addr,
970 CONN_MANAGER,
971 CONN_ACK,
972 TIPC_OK,
973 port_out_seqno(p_ptr),
974 ack);
975 }
976 tipc_port_unlock(p_ptr);
977 tipc_net_route_msg(buf);
978 }
979
980 /*
981 * tipc_createport(): user level call. Will add port to
982 * registry if non-zero user_ref.
983 */
984
985 int tipc_createport(u32 user_ref,
986 void *usr_handle,
987 unsigned int importance,
988 tipc_msg_err_event error_cb,
989 tipc_named_msg_err_event named_error_cb,
990 tipc_conn_shutdown_event conn_error_cb,
991 tipc_msg_event msg_cb,
992 tipc_named_msg_event named_msg_cb,
993 tipc_conn_msg_event conn_msg_cb,
994 tipc_continue_event continue_event_cb,/* May be zero */
995 u32 *portref)
996 {
997 struct user_port *up_ptr;
998 struct port *p_ptr;
999
1000 up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
1001 if (!up_ptr) {
1002 warn("Port creation failed, no memory\n");
1003 return -ENOMEM;
1004 }
1005 p_ptr = (struct port *)tipc_createport_raw(NULL, port_dispatcher,
1006 port_wakeup, importance);
1007 if (!p_ptr) {
1008 kfree(up_ptr);
1009 return -ENOMEM;
1010 }
1011
1012 p_ptr->user_port = up_ptr;
1013 up_ptr->user_ref = user_ref;
1014 up_ptr->usr_handle = usr_handle;
1015 up_ptr->ref = p_ptr->publ.ref;
1016 up_ptr->err_cb = error_cb;
1017 up_ptr->named_err_cb = named_error_cb;
1018 up_ptr->conn_err_cb = conn_error_cb;
1019 up_ptr->msg_cb = msg_cb;
1020 up_ptr->named_msg_cb = named_msg_cb;
1021 up_ptr->conn_msg_cb = conn_msg_cb;
1022 up_ptr->continue_event_cb = continue_event_cb;
1023 INIT_LIST_HEAD(&up_ptr->uport_list);
1024 tipc_reg_add_port(up_ptr);
1025 *portref = p_ptr->publ.ref;
1026 tipc_port_unlock(p_ptr);
1027 return 0;
1028 }
1029
1030 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
1031 {
1032 id->ref = ref;
1033 id->node = tipc_own_addr;
1034 return 0;
1035 }
1036
1037 int tipc_portimportance(u32 ref, unsigned int *importance)
1038 {
1039 struct port *p_ptr;
1040
1041 p_ptr = tipc_port_lock(ref);
1042 if (!p_ptr)
1043 return -EINVAL;
1044 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1045 tipc_port_unlock(p_ptr);
1046 return 0;
1047 }
1048
1049 int tipc_set_portimportance(u32 ref, unsigned int imp)
1050 {
1051 struct port *p_ptr;
1052
1053 if (imp > TIPC_CRITICAL_IMPORTANCE)
1054 return -EINVAL;
1055
1056 p_ptr = tipc_port_lock(ref);
1057 if (!p_ptr)
1058 return -EINVAL;
1059 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1060 tipc_port_unlock(p_ptr);
1061 return 0;
1062 }
1063
1064
1065 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1066 {
1067 struct port *p_ptr;
1068 struct publication *publ;
1069 u32 key;
1070 int res = -EINVAL;
1071
1072 p_ptr = tipc_port_lock(ref);
1073 if (!p_ptr)
1074 return -EINVAL;
1075
1076 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1077 "lower = %u, upper = %u\n",
1078 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1079 if (p_ptr->publ.connected)
1080 goto exit;
1081 if (seq->lower > seq->upper)
1082 goto exit;
1083 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1084 goto exit;
1085 key = ref + p_ptr->pub_count + 1;
1086 if (key == ref) {
1087 res = -EADDRINUSE;
1088 goto exit;
1089 }
1090 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1091 scope, p_ptr->publ.ref, key);
1092 if (publ) {
1093 list_add(&publ->pport_list, &p_ptr->publications);
1094 p_ptr->pub_count++;
1095 p_ptr->publ.published = 1;
1096 res = 0;
1097 }
1098 exit:
1099 tipc_port_unlock(p_ptr);
1100 return res;
1101 }
1102
1103 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1104 {
1105 struct port *p_ptr;
1106 struct publication *publ;
1107 struct publication *tpubl;
1108 int res = -EINVAL;
1109
1110 p_ptr = tipc_port_lock(ref);
1111 if (!p_ptr)
1112 return -EINVAL;
1113 if (!seq) {
1114 list_for_each_entry_safe(publ, tpubl,
1115 &p_ptr->publications, pport_list) {
1116 tipc_nametbl_withdraw(publ->type, publ->lower,
1117 publ->ref, publ->key);
1118 }
1119 res = 0;
1120 } else {
1121 list_for_each_entry_safe(publ, tpubl,
1122 &p_ptr->publications, pport_list) {
1123 if (publ->scope != scope)
1124 continue;
1125 if (publ->type != seq->type)
1126 continue;
1127 if (publ->lower != seq->lower)
1128 continue;
1129 if (publ->upper != seq->upper)
1130 break;
1131 tipc_nametbl_withdraw(publ->type, publ->lower,
1132 publ->ref, publ->key);
1133 res = 0;
1134 break;
1135 }
1136 }
1137 if (list_empty(&p_ptr->publications))
1138 p_ptr->publ.published = 0;
1139 tipc_port_unlock(p_ptr);
1140 return res;
1141 }
1142
1143 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1144 {
1145 struct port *p_ptr;
1146 struct tipc_msg *msg;
1147 int res = -EINVAL;
1148
1149 p_ptr = tipc_port_lock(ref);
1150 if (!p_ptr)
1151 return -EINVAL;
1152 if (p_ptr->publ.published || p_ptr->publ.connected)
1153 goto exit;
1154 if (!peer->ref)
1155 goto exit;
1156
1157 msg = &p_ptr->publ.phdr;
1158 msg_set_destnode(msg, peer->node);
1159 msg_set_destport(msg, peer->ref);
1160 msg_set_orignode(msg, tipc_own_addr);
1161 msg_set_origport(msg, p_ptr->publ.ref);
1162 msg_set_transp_seqno(msg, 42);
1163 msg_set_type(msg, TIPC_CONN_MSG);
1164 if (!may_route(peer->node))
1165 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1166 else
1167 msg_set_hdr_sz(msg, LONG_H_SIZE);
1168
1169 p_ptr->probing_interval = PROBING_INTERVAL;
1170 p_ptr->probing_state = CONFIRMED;
1171 p_ptr->publ.connected = 1;
1172 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1173
1174 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1175 (void *)(unsigned long)ref,
1176 (net_ev_handler)port_handle_node_down);
1177 res = 0;
1178 exit:
1179 tipc_port_unlock(p_ptr);
1180 p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1181 return res;
1182 }
1183
1184 /**
1185 * tipc_disconnect_port - disconnect port from peer
1186 *
1187 * Port must be locked.
1188 */
1189
1190 int tipc_disconnect_port(struct tipc_port *tp_ptr)
1191 {
1192 int res;
1193
1194 if (tp_ptr->connected) {
1195 tp_ptr->connected = 0;
1196 /* let timer expire on it's own to avoid deadlock! */
1197 tipc_nodesub_unsubscribe(
1198 &((struct port *)tp_ptr)->subscription);
1199 res = 0;
1200 } else {
1201 res = -ENOTCONN;
1202 }
1203 return res;
1204 }
1205
1206 /*
1207 * tipc_disconnect(): Disconnect port form peer.
1208 * This is a node local operation.
1209 */
1210
1211 int tipc_disconnect(u32 ref)
1212 {
1213 struct port *p_ptr;
1214 int res;
1215
1216 p_ptr = tipc_port_lock(ref);
1217 if (!p_ptr)
1218 return -EINVAL;
1219 res = tipc_disconnect_port((struct tipc_port *)p_ptr);
1220 tipc_port_unlock(p_ptr);
1221 return res;
1222 }
1223
1224 /*
1225 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1226 */
1227 int tipc_shutdown(u32 ref)
1228 {
1229 struct port *p_ptr;
1230 struct sk_buff *buf = NULL;
1231
1232 p_ptr = tipc_port_lock(ref);
1233 if (!p_ptr)
1234 return -EINVAL;
1235
1236 if (p_ptr->publ.connected) {
1237 u32 imp = msg_importance(&p_ptr->publ.phdr);
1238 if (imp < TIPC_CRITICAL_IMPORTANCE)
1239 imp++;
1240 buf = port_build_proto_msg(port_peerport(p_ptr),
1241 port_peernode(p_ptr),
1242 ref,
1243 tipc_own_addr,
1244 imp,
1245 TIPC_CONN_MSG,
1246 TIPC_CONN_SHUTDOWN,
1247 port_out_seqno(p_ptr),
1248 0);
1249 }
1250 tipc_port_unlock(p_ptr);
1251 tipc_net_route_msg(buf);
1252 return tipc_disconnect(ref);
1253 }
1254
1255 int tipc_isconnected(u32 ref, int *isconnected)
1256 {
1257 struct port *p_ptr;
1258
1259 p_ptr = tipc_port_lock(ref);
1260 if (!p_ptr)
1261 return -EINVAL;
1262 *isconnected = p_ptr->publ.connected;
1263 tipc_port_unlock(p_ptr);
1264 return 0;
1265 }
1266
1267 int tipc_peer(u32 ref, struct tipc_portid *peer)
1268 {
1269 struct port *p_ptr;
1270 int res;
1271
1272 p_ptr = tipc_port_lock(ref);
1273 if (!p_ptr)
1274 return -EINVAL;
1275 if (p_ptr->publ.connected) {
1276 peer->ref = port_peerport(p_ptr);
1277 peer->node = port_peernode(p_ptr);
1278 res = 0;
1279 } else
1280 res = -ENOTCONN;
1281 tipc_port_unlock(p_ptr);
1282 return res;
1283 }
1284
1285 int tipc_ref_valid(u32 ref)
1286 {
1287 /* Works irrespective of type */
1288 return !!tipc_ref_deref(ref);
1289 }
1290
1291
1292 /*
1293 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1294 * message for this node.
1295 */
1296
1297 int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1298 struct iovec const *msg_sect)
1299 {
1300 struct sk_buff *buf;
1301 int res;
1302
1303 res = tipc_msg_build(&sender->publ.phdr, msg_sect, num_sect,
1304 MAX_MSG_SIZE, !sender->user_port, &buf);
1305 if (likely(buf))
1306 tipc_port_recv_msg(buf);
1307 return res;
1308 }
1309
1310 /**
1311 * tipc_send - send message sections on connection
1312 */
1313
1314 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1315 {
1316 struct port *p_ptr;
1317 u32 destnode;
1318 int res;
1319
1320 p_ptr = tipc_port_deref(ref);
1321 if (!p_ptr || !p_ptr->publ.connected)
1322 return -EINVAL;
1323
1324 p_ptr->publ.congested = 1;
1325 if (!tipc_port_congested(p_ptr)) {
1326 destnode = port_peernode(p_ptr);
1327 if (likely(destnode != tipc_own_addr))
1328 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1329 destnode);
1330 else
1331 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1332
1333 if (likely(res != -ELINKCONG)) {
1334 port_incr_out_seqno(p_ptr);
1335 p_ptr->publ.congested = 0;
1336 p_ptr->sent++;
1337 return res;
1338 }
1339 }
1340 if (port_unreliable(p_ptr)) {
1341 p_ptr->publ.congested = 0;
1342 /* Just calculate msg length and return */
1343 return tipc_msg_calc_data_size(msg_sect, num_sect);
1344 }
1345 return -ELINKCONG;
1346 }
1347
1348 /**
1349 * tipc_send_buf - send message buffer on connection
1350 */
1351
1352 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1353 {
1354 struct port *p_ptr;
1355 struct tipc_msg *msg;
1356 u32 destnode;
1357 u32 hsz;
1358 u32 sz;
1359 u32 res;
1360
1361 p_ptr = tipc_port_deref(ref);
1362 if (!p_ptr || !p_ptr->publ.connected)
1363 return -EINVAL;
1364
1365 msg = &p_ptr->publ.phdr;
1366 hsz = msg_hdr_sz(msg);
1367 sz = hsz + dsz;
1368 msg_set_size(msg, sz);
1369 if (skb_cow(buf, hsz))
1370 return -ENOMEM;
1371
1372 skb_push(buf, hsz);
1373 skb_copy_to_linear_data(buf, msg, hsz);
1374 destnode = msg_destnode(msg);
1375 p_ptr->publ.congested = 1;
1376 if (!tipc_port_congested(p_ptr)) {
1377 if (likely(destnode != tipc_own_addr))
1378 res = tipc_send_buf_fast(buf, destnode);
1379 else {
1380 tipc_port_recv_msg(buf);
1381 res = sz;
1382 }
1383 if (likely(res != -ELINKCONG)) {
1384 port_incr_out_seqno(p_ptr);
1385 p_ptr->sent++;
1386 p_ptr->publ.congested = 0;
1387 return res;
1388 }
1389 }
1390 if (port_unreliable(p_ptr)) {
1391 p_ptr->publ.congested = 0;
1392 return dsz;
1393 }
1394 return -ELINKCONG;
1395 }
1396
1397 /**
1398 * tipc_forward2name - forward message sections to port name
1399 */
1400
1401 int tipc_forward2name(u32 ref,
1402 struct tipc_name const *name,
1403 u32 domain,
1404 u32 num_sect,
1405 struct iovec const *msg_sect,
1406 struct tipc_portid const *orig,
1407 unsigned int importance)
1408 {
1409 struct port *p_ptr;
1410 struct tipc_msg *msg;
1411 u32 destnode = domain;
1412 u32 destport;
1413 int res;
1414
1415 p_ptr = tipc_port_deref(ref);
1416 if (!p_ptr || p_ptr->publ.connected)
1417 return -EINVAL;
1418
1419 msg = &p_ptr->publ.phdr;
1420 msg_set_type(msg, TIPC_NAMED_MSG);
1421 msg_set_orignode(msg, orig->node);
1422 msg_set_origport(msg, orig->ref);
1423 msg_set_hdr_sz(msg, LONG_H_SIZE);
1424 msg_set_nametype(msg, name->type);
1425 msg_set_nameinst(msg, name->instance);
1426 msg_set_lookup_scope(msg, tipc_addr_scope(domain));
1427 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1428 msg_set_importance(msg,importance);
1429 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1430 msg_set_destnode(msg, destnode);
1431 msg_set_destport(msg, destport);
1432
1433 if (likely(destport || destnode)) {
1434 p_ptr->sent++;
1435 if (likely(destnode == tipc_own_addr))
1436 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1437 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1438 destnode);
1439 if (likely(res != -ELINKCONG))
1440 return res;
1441 if (port_unreliable(p_ptr)) {
1442 /* Just calculate msg length and return */
1443 return tipc_msg_calc_data_size(msg_sect, num_sect);
1444 }
1445 return -ELINKCONG;
1446 }
1447 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1448 TIPC_ERR_NO_NAME);
1449 }
1450
1451 /**
1452 * tipc_send2name - send message sections to port name
1453 */
1454
1455 int tipc_send2name(u32 ref,
1456 struct tipc_name const *name,
1457 unsigned int domain,
1458 unsigned int num_sect,
1459 struct iovec const *msg_sect)
1460 {
1461 struct tipc_portid orig;
1462
1463 orig.ref = ref;
1464 orig.node = tipc_own_addr;
1465 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1466 TIPC_PORT_IMPORTANCE);
1467 }
1468
1469 /**
1470 * tipc_forward_buf2name - forward message buffer to port name
1471 */
1472
1473 int tipc_forward_buf2name(u32 ref,
1474 struct tipc_name const *name,
1475 u32 domain,
1476 struct sk_buff *buf,
1477 unsigned int dsz,
1478 struct tipc_portid const *orig,
1479 unsigned int importance)
1480 {
1481 struct port *p_ptr;
1482 struct tipc_msg *msg;
1483 u32 destnode = domain;
1484 u32 destport;
1485 int res;
1486
1487 p_ptr = (struct port *)tipc_ref_deref(ref);
1488 if (!p_ptr || p_ptr->publ.connected)
1489 return -EINVAL;
1490
1491 msg = &p_ptr->publ.phdr;
1492 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1493 msg_set_importance(msg, importance);
1494 msg_set_type(msg, TIPC_NAMED_MSG);
1495 msg_set_orignode(msg, orig->node);
1496 msg_set_origport(msg, orig->ref);
1497 msg_set_nametype(msg, name->type);
1498 msg_set_nameinst(msg, name->instance);
1499 msg_set_lookup_scope(msg, tipc_addr_scope(domain));
1500 msg_set_hdr_sz(msg, LONG_H_SIZE);
1501 msg_set_size(msg, LONG_H_SIZE + dsz);
1502 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1503 msg_set_destnode(msg, destnode);
1504 msg_set_destport(msg, destport);
1505 msg_dbg(msg, "forw2name ==> ");
1506 if (skb_cow(buf, LONG_H_SIZE))
1507 return -ENOMEM;
1508 skb_push(buf, LONG_H_SIZE);
1509 skb_copy_to_linear_data(buf, msg, LONG_H_SIZE);
1510 msg_dbg(buf_msg(buf),"PREP:");
1511 if (likely(destport || destnode)) {
1512 p_ptr->sent++;
1513 if (destnode == tipc_own_addr)
1514 return tipc_port_recv_msg(buf);
1515 res = tipc_send_buf_fast(buf, destnode);
1516 if (likely(res != -ELINKCONG))
1517 return res;
1518 if (port_unreliable(p_ptr))
1519 return dsz;
1520 return -ELINKCONG;
1521 }
1522 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1523 }
1524
1525 /**
1526 * tipc_send_buf2name - send message buffer to port name
1527 */
1528
1529 int tipc_send_buf2name(u32 ref,
1530 struct tipc_name const *dest,
1531 u32 domain,
1532 struct sk_buff *buf,
1533 unsigned int dsz)
1534 {
1535 struct tipc_portid orig;
1536
1537 orig.ref = ref;
1538 orig.node = tipc_own_addr;
1539 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1540 TIPC_PORT_IMPORTANCE);
1541 }
1542
1543 /**
1544 * tipc_forward2port - forward message sections to port identity
1545 */
1546
1547 int tipc_forward2port(u32 ref,
1548 struct tipc_portid const *dest,
1549 unsigned int num_sect,
1550 struct iovec const *msg_sect,
1551 struct tipc_portid const *orig,
1552 unsigned int importance)
1553 {
1554 struct port *p_ptr;
1555 struct tipc_msg *msg;
1556 int res;
1557
1558 p_ptr = tipc_port_deref(ref);
1559 if (!p_ptr || p_ptr->publ.connected)
1560 return -EINVAL;
1561
1562 msg = &p_ptr->publ.phdr;
1563 msg_set_type(msg, TIPC_DIRECT_MSG);
1564 msg_set_orignode(msg, orig->node);
1565 msg_set_origport(msg, orig->ref);
1566 msg_set_destnode(msg, dest->node);
1567 msg_set_destport(msg, dest->ref);
1568 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1569 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1570 msg_set_importance(msg, importance);
1571 p_ptr->sent++;
1572 if (dest->node == tipc_own_addr)
1573 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1574 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1575 if (likely(res != -ELINKCONG))
1576 return res;
1577 if (port_unreliable(p_ptr)) {
1578 /* Just calculate msg length and return */
1579 return tipc_msg_calc_data_size(msg_sect, num_sect);
1580 }
1581 return -ELINKCONG;
1582 }
1583
1584 /**
1585 * tipc_send2port - send message sections to port identity
1586 */
1587
1588 int tipc_send2port(u32 ref,
1589 struct tipc_portid const *dest,
1590 unsigned int num_sect,
1591 struct iovec const *msg_sect)
1592 {
1593 struct tipc_portid orig;
1594
1595 orig.ref = ref;
1596 orig.node = tipc_own_addr;
1597 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1598 TIPC_PORT_IMPORTANCE);
1599 }
1600
1601 /**
1602 * tipc_forward_buf2port - forward message buffer to port identity
1603 */
1604 int tipc_forward_buf2port(u32 ref,
1605 struct tipc_portid const *dest,
1606 struct sk_buff *buf,
1607 unsigned int dsz,
1608 struct tipc_portid const *orig,
1609 unsigned int importance)
1610 {
1611 struct port *p_ptr;
1612 struct tipc_msg *msg;
1613 int res;
1614
1615 p_ptr = (struct port *)tipc_ref_deref(ref);
1616 if (!p_ptr || p_ptr->publ.connected)
1617 return -EINVAL;
1618
1619 msg = &p_ptr->publ.phdr;
1620 msg_set_type(msg, TIPC_DIRECT_MSG);
1621 msg_set_orignode(msg, orig->node);
1622 msg_set_origport(msg, orig->ref);
1623 msg_set_destnode(msg, dest->node);
1624 msg_set_destport(msg, dest->ref);
1625 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1626 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1627 msg_set_importance(msg, importance);
1628 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1629 if (skb_cow(buf, DIR_MSG_H_SIZE))
1630 return -ENOMEM;
1631
1632 skb_push(buf, DIR_MSG_H_SIZE);
1633 skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1634 msg_dbg(msg, "buf2port: ");
1635 p_ptr->sent++;
1636 if (dest->node == tipc_own_addr)
1637 return tipc_port_recv_msg(buf);
1638 res = tipc_send_buf_fast(buf, dest->node);
1639 if (likely(res != -ELINKCONG))
1640 return res;
1641 if (port_unreliable(p_ptr))
1642 return dsz;
1643 return -ELINKCONG;
1644 }
1645
1646 /**
1647 * tipc_send_buf2port - send message buffer to port identity
1648 */
1649
1650 int tipc_send_buf2port(u32 ref,
1651 struct tipc_portid const *dest,
1652 struct sk_buff *buf,
1653 unsigned int dsz)
1654 {
1655 struct tipc_portid orig;
1656
1657 orig.ref = ref;
1658 orig.node = tipc_own_addr;
1659 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1660 TIPC_PORT_IMPORTANCE);
1661 }
Tomato firmware and modifications.