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Linux 2.6.26-rc5
[linux-2.6/openmoko-kernel/knife-kernel.git] / net / tipc / port.c
blob2f5806410c644b5b970998a17c9630d5ccf8f5af
1 /*
2 * net/tipc/port.c: TIPC port code
3 *
4 * Copyright (c) 1992-2007, Ericsson AB
5 * Copyright (c) 2004-2007, 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 = 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 native TIPC port
215 *
216 * Returns local port reference
217 */
218
219 u32 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 0;
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 0;
238 }
239
240 tipc_port_lock(ref);
241 p_ptr->publ.usr_handle = usr_handle;
242 p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
243 p_ptr->publ.ref = ref;
244 msg = &p_ptr->publ.phdr;
245 msg_init(msg, TIPC_LOW_IMPORTANCE, TIPC_NAMED_MSG, TIPC_OK, LONG_H_SIZE,
246 0);
247 msg_set_orignode(msg, tipc_own_addr);
248 msg_set_prevnode(msg, tipc_own_addr);
249 msg_set_origport(msg, ref);
250 msg_set_importance(msg,importance);
251 p_ptr->last_in_seqno = 41;
252 p_ptr->sent = 1;
253 INIT_LIST_HEAD(&p_ptr->wait_list);
254 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
255 p_ptr->congested_link = NULL;
256 p_ptr->dispatcher = dispatcher;
257 p_ptr->wakeup = wakeup;
258 p_ptr->user_port = NULL;
259 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
260 spin_lock_bh(&tipc_port_list_lock);
261 INIT_LIST_HEAD(&p_ptr->publications);
262 INIT_LIST_HEAD(&p_ptr->port_list);
263 list_add_tail(&p_ptr->port_list, &ports);
264 spin_unlock_bh(&tipc_port_list_lock);
265 tipc_port_unlock(p_ptr);
266 return ref;
267 }
268
269 int tipc_deleteport(u32 ref)
270 {
271 struct port *p_ptr;
272 struct sk_buff *buf = NULL;
273
274 tipc_withdraw(ref, 0, NULL);
275 p_ptr = tipc_port_lock(ref);
276 if (!p_ptr)
277 return -EINVAL;
278
279 tipc_ref_discard(ref);
280 tipc_port_unlock(p_ptr);
281
282 k_cancel_timer(&p_ptr->timer);
283 if (p_ptr->publ.connected) {
284 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
285 tipc_nodesub_unsubscribe(&p_ptr->subscription);
286 }
287 if (p_ptr->user_port) {
288 tipc_reg_remove_port(p_ptr->user_port);
289 kfree(p_ptr->user_port);
290 }
291
292 spin_lock_bh(&tipc_port_list_lock);
293 list_del(&p_ptr->port_list);
294 list_del(&p_ptr->wait_list);
295 spin_unlock_bh(&tipc_port_list_lock);
296 k_term_timer(&p_ptr->timer);
297 kfree(p_ptr);
298 dbg("Deleted port %u\n", ref);
299 tipc_net_route_msg(buf);
300 return TIPC_OK;
301 }
302
303 /**
304 * tipc_get_port() - return port associated with 'ref'
305 *
306 * Note: Port is not locked.
307 */
308
309 struct tipc_port *tipc_get_port(const u32 ref)
310 {
311 return (struct tipc_port *)tipc_ref_deref(ref);
312 }
313
314 /**
315 * tipc_get_handle - return user handle associated to port 'ref'
316 */
317
318 void *tipc_get_handle(const u32 ref)
319 {
320 struct port *p_ptr;
321 void * handle;
322
323 p_ptr = tipc_port_lock(ref);
324 if (!p_ptr)
325 return NULL;
326 handle = p_ptr->publ.usr_handle;
327 tipc_port_unlock(p_ptr);
328 return handle;
329 }
330
331 static int port_unreliable(struct port *p_ptr)
332 {
333 return msg_src_droppable(&p_ptr->publ.phdr);
334 }
335
336 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
337 {
338 struct port *p_ptr;
339
340 p_ptr = tipc_port_lock(ref);
341 if (!p_ptr)
342 return -EINVAL;
343 *isunreliable = port_unreliable(p_ptr);
344 tipc_port_unlock(p_ptr);
345 return TIPC_OK;
346 }
347
348 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
349 {
350 struct port *p_ptr;
351
352 p_ptr = tipc_port_lock(ref);
353 if (!p_ptr)
354 return -EINVAL;
355 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
356 tipc_port_unlock(p_ptr);
357 return TIPC_OK;
358 }
359
360 static int port_unreturnable(struct port *p_ptr)
361 {
362 return msg_dest_droppable(&p_ptr->publ.phdr);
363 }
364
365 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
366 {
367 struct port *p_ptr;
368
369 p_ptr = tipc_port_lock(ref);
370 if (!p_ptr)
371 return -EINVAL;
372 *isunrejectable = port_unreturnable(p_ptr);
373 tipc_port_unlock(p_ptr);
374 return TIPC_OK;
375 }
376
377 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
378 {
379 struct port *p_ptr;
380
381 p_ptr = tipc_port_lock(ref);
382 if (!p_ptr)
383 return -EINVAL;
384 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
385 tipc_port_unlock(p_ptr);
386 return TIPC_OK;
387 }
388
389 /*
390 * port_build_proto_msg(): build a port level protocol
391 * or a connection abortion message. Called with
392 * tipc_port lock on.
393 */
394 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
395 u32 origport, u32 orignode,
396 u32 usr, u32 type, u32 err,
397 u32 seqno, u32 ack)
398 {
399 struct sk_buff *buf;
400 struct tipc_msg *msg;
401
402 buf = buf_acquire(LONG_H_SIZE);
403 if (buf) {
404 msg = buf_msg(buf);
405 msg_init(msg, usr, type, err, LONG_H_SIZE, destnode);
406 msg_set_destport(msg, destport);
407 msg_set_origport(msg, origport);
408 msg_set_destnode(msg, destnode);
409 msg_set_orignode(msg, orignode);
410 msg_set_transp_seqno(msg, seqno);
411 msg_set_msgcnt(msg, ack);
412 msg_dbg(msg, "PORT>SEND>:");
413 }
414 return buf;
415 }
416
417 int tipc_reject_msg(struct sk_buff *buf, u32 err)
418 {
419 struct tipc_msg *msg = buf_msg(buf);
420 struct sk_buff *rbuf;
421 struct tipc_msg *rmsg;
422 int hdr_sz;
423 u32 imp = msg_importance(msg);
424 u32 data_sz = msg_data_sz(msg);
425
426 if (data_sz > MAX_REJECT_SIZE)
427 data_sz = MAX_REJECT_SIZE;
428 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
429 imp++;
430 msg_dbg(msg, "port->rej: ");
431
432 /* discard rejected message if it shouldn't be returned to sender */
433 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
434 buf_discard(buf);
435 return data_sz;
436 }
437
438 /* construct rejected message */
439 if (msg_mcast(msg))
440 hdr_sz = MCAST_H_SIZE;
441 else
442 hdr_sz = LONG_H_SIZE;
443 rbuf = buf_acquire(data_sz + hdr_sz);
444 if (rbuf == NULL) {
445 buf_discard(buf);
446 return data_sz;
447 }
448 rmsg = buf_msg(rbuf);
449 msg_init(rmsg, imp, msg_type(msg), err, hdr_sz, msg_orignode(msg));
450 msg_set_destport(rmsg, msg_origport(msg));
451 msg_set_prevnode(rmsg, tipc_own_addr);
452 msg_set_origport(rmsg, msg_destport(msg));
453 if (msg_short(msg))
454 msg_set_orignode(rmsg, tipc_own_addr);
455 else
456 msg_set_orignode(rmsg, msg_destnode(msg));
457 msg_set_size(rmsg, data_sz + hdr_sz);
458 msg_set_nametype(rmsg, msg_nametype(msg));
459 msg_set_nameinst(rmsg, msg_nameinst(msg));
460 skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
461
462 /* send self-abort message when rejecting on a connected port */
463 if (msg_connected(msg)) {
464 struct sk_buff *abuf = NULL;
465 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
466
467 if (p_ptr) {
468 if (p_ptr->publ.connected)
469 abuf = port_build_self_abort_msg(p_ptr, err);
470 tipc_port_unlock(p_ptr);
471 }
472 tipc_net_route_msg(abuf);
473 }
474
475 /* send rejected message */
476 buf_discard(buf);
477 tipc_net_route_msg(rbuf);
478 return data_sz;
479 }
480
481 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
482 struct iovec const *msg_sect, u32 num_sect,
483 int err)
484 {
485 struct sk_buff *buf;
486 int res;
487
488 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
489 !p_ptr->user_port, &buf);
490 if (!buf)
491 return res;
492
493 return tipc_reject_msg(buf, err);
494 }
495
496 static void port_timeout(unsigned long ref)
497 {
498 struct port *p_ptr = tipc_port_lock(ref);
499 struct sk_buff *buf = NULL;
500
501 if (!p_ptr)
502 return;
503
504 if (!p_ptr->publ.connected) {
505 tipc_port_unlock(p_ptr);
506 return;
507 }
508
509 /* Last probe answered ? */
510 if (p_ptr->probing_state == PROBING) {
511 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
512 } else {
513 buf = port_build_proto_msg(port_peerport(p_ptr),
514 port_peernode(p_ptr),
515 p_ptr->publ.ref,
516 tipc_own_addr,
517 CONN_MANAGER,
518 CONN_PROBE,
519 TIPC_OK,
520 port_out_seqno(p_ptr),
521 0);
522 port_incr_out_seqno(p_ptr);
523 p_ptr->probing_state = PROBING;
524 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
525 }
526 tipc_port_unlock(p_ptr);
527 tipc_net_route_msg(buf);
528 }
529
530
531 static void port_handle_node_down(unsigned long ref)
532 {
533 struct port *p_ptr = tipc_port_lock(ref);
534 struct sk_buff* buf = NULL;
535
536 if (!p_ptr)
537 return;
538 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
539 tipc_port_unlock(p_ptr);
540 tipc_net_route_msg(buf);
541 }
542
543
544 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
545 {
546 u32 imp = msg_importance(&p_ptr->publ.phdr);
547
548 if (!p_ptr->publ.connected)
549 return NULL;
550 if (imp < TIPC_CRITICAL_IMPORTANCE)
551 imp++;
552 return port_build_proto_msg(p_ptr->publ.ref,
553 tipc_own_addr,
554 port_peerport(p_ptr),
555 port_peernode(p_ptr),
556 imp,
557 TIPC_CONN_MSG,
558 err,
559 p_ptr->last_in_seqno + 1,
560 0);
561 }
562
563
564 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
565 {
566 u32 imp = msg_importance(&p_ptr->publ.phdr);
567
568 if (!p_ptr->publ.connected)
569 return NULL;
570 if (imp < TIPC_CRITICAL_IMPORTANCE)
571 imp++;
572 return port_build_proto_msg(port_peerport(p_ptr),
573 port_peernode(p_ptr),
574 p_ptr->publ.ref,
575 tipc_own_addr,
576 imp,
577 TIPC_CONN_MSG,
578 err,
579 port_out_seqno(p_ptr),
580 0);
581 }
582
583 void tipc_port_recv_proto_msg(struct sk_buff *buf)
584 {
585 struct tipc_msg *msg = buf_msg(buf);
586 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
587 u32 err = TIPC_OK;
588 struct sk_buff *r_buf = NULL;
589 struct sk_buff *abort_buf = NULL;
590
591 msg_dbg(msg, "PORT<RECV<:");
592
593 if (!p_ptr) {
594 err = TIPC_ERR_NO_PORT;
595 } else if (p_ptr->publ.connected) {
596 if (port_peernode(p_ptr) != msg_orignode(msg))
597 err = TIPC_ERR_NO_PORT;
598 if (port_peerport(p_ptr) != msg_origport(msg))
599 err = TIPC_ERR_NO_PORT;
600 if (!err && msg_routed(msg)) {
601 u32 seqno = msg_transp_seqno(msg);
602 u32 myno = ++p_ptr->last_in_seqno;
603 if (seqno != myno) {
604 err = TIPC_ERR_NO_PORT;
605 abort_buf = port_build_self_abort_msg(p_ptr, err);
606 }
607 }
608 if (msg_type(msg) == CONN_ACK) {
609 int wakeup = tipc_port_congested(p_ptr) &&
610 p_ptr->publ.congested &&
611 p_ptr->wakeup;
612 p_ptr->acked += msg_msgcnt(msg);
613 if (tipc_port_congested(p_ptr))
614 goto exit;
615 p_ptr->publ.congested = 0;
616 if (!wakeup)
617 goto exit;
618 p_ptr->wakeup(&p_ptr->publ);
619 goto exit;
620 }
621 } else if (p_ptr->publ.published) {
622 err = TIPC_ERR_NO_PORT;
623 }
624 if (err) {
625 r_buf = port_build_proto_msg(msg_origport(msg),
626 msg_orignode(msg),
627 msg_destport(msg),
628 tipc_own_addr,
629 TIPC_HIGH_IMPORTANCE,
630 TIPC_CONN_MSG,
631 err,
632 0,
633 0);
634 goto exit;
635 }
636
637 /* All is fine */
638 if (msg_type(msg) == CONN_PROBE) {
639 r_buf = port_build_proto_msg(msg_origport(msg),
640 msg_orignode(msg),
641 msg_destport(msg),
642 tipc_own_addr,
643 CONN_MANAGER,
644 CONN_PROBE_REPLY,
645 TIPC_OK,
646 port_out_seqno(p_ptr),
647 0);
648 }
649 p_ptr->probing_state = CONFIRMED;
650 port_incr_out_seqno(p_ptr);
651 exit:
652 if (p_ptr)
653 tipc_port_unlock(p_ptr);
654 tipc_net_route_msg(r_buf);
655 tipc_net_route_msg(abort_buf);
656 buf_discard(buf);
657 }
658
659 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
660 {
661 struct publication *publ;
662
663 if (full_id)
664 tipc_printf(buf, "<%u.%u.%u:%u>:",
665 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
666 tipc_node(tipc_own_addr), p_ptr->publ.ref);
667 else
668 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
669
670 if (p_ptr->publ.connected) {
671 u32 dport = port_peerport(p_ptr);
672 u32 destnode = port_peernode(p_ptr);
673
674 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
675 tipc_zone(destnode), tipc_cluster(destnode),
676 tipc_node(destnode), dport);
677 if (p_ptr->publ.conn_type != 0)
678 tipc_printf(buf, " via {%u,%u}",
679 p_ptr->publ.conn_type,
680 p_ptr->publ.conn_instance);
681 }
682 else if (p_ptr->publ.published) {
683 tipc_printf(buf, " bound to");
684 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
685 if (publ->lower == publ->upper)
686 tipc_printf(buf, " {%u,%u}", publ->type,
687 publ->lower);
688 else
689 tipc_printf(buf, " {%u,%u,%u}", publ->type,
690 publ->lower, publ->upper);
691 }
692 }
693 tipc_printf(buf, "\n");
694 }
695
696 #define MAX_PORT_QUERY 32768
697
698 struct sk_buff *tipc_port_get_ports(void)
699 {
700 struct sk_buff *buf;
701 struct tlv_desc *rep_tlv;
702 struct print_buf pb;
703 struct port *p_ptr;
704 int str_len;
705
706 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
707 if (!buf)
708 return NULL;
709 rep_tlv = (struct tlv_desc *)buf->data;
710
711 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
712 spin_lock_bh(&tipc_port_list_lock);
713 list_for_each_entry(p_ptr, &ports, port_list) {
714 spin_lock_bh(p_ptr->publ.lock);
715 port_print(p_ptr, &pb, 0);
716 spin_unlock_bh(p_ptr->publ.lock);
717 }
718 spin_unlock_bh(&tipc_port_list_lock);
719 str_len = tipc_printbuf_validate(&pb);
720
721 skb_put(buf, TLV_SPACE(str_len));
722 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
723
724 return buf;
725 }
726
727 #if 0
728
729 #define MAX_PORT_STATS 2000
730
731 struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
732 {
733 u32 ref;
734 struct port *p_ptr;
735 struct sk_buff *buf;
736 struct tlv_desc *rep_tlv;
737 struct print_buf pb;
738 int str_len;
739
740 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
741 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
742
743 ref = *(u32 *)TLV_DATA(req_tlv_area);
744 ref = ntohl(ref);
745
746 p_ptr = tipc_port_lock(ref);
747 if (!p_ptr)
748 return cfg_reply_error_string("port not found");
749
750 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
751 if (!buf) {
752 tipc_port_unlock(p_ptr);
753 return NULL;
754 }
755 rep_tlv = (struct tlv_desc *)buf->data;
756
757 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
758 port_print(p_ptr, &pb, 1);
759 /* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
760 tipc_port_unlock(p_ptr);
761 str_len = tipc_printbuf_validate(&pb);
762
763 skb_put(buf, TLV_SPACE(str_len));
764 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
765
766 return buf;
767 }
768
769 #endif
770
771 void tipc_port_reinit(void)
772 {
773 struct port *p_ptr;
774 struct tipc_msg *msg;
775
776 spin_lock_bh(&tipc_port_list_lock);
777 list_for_each_entry(p_ptr, &ports, port_list) {
778 msg = &p_ptr->publ.phdr;
779 if (msg_orignode(msg) == tipc_own_addr)
780 break;
781 msg_set_orignode(msg, tipc_own_addr);
782 }
783 spin_unlock_bh(&tipc_port_list_lock);
784 }
785
786
787 /*
788 * port_dispatcher_sigh(): Signal handler for messages destinated
789 * to the tipc_port interface.
790 */
791
792 static void port_dispatcher_sigh(void *dummy)
793 {
794 struct sk_buff *buf;
795
796 spin_lock_bh(&queue_lock);
797 buf = msg_queue_head;
798 msg_queue_head = NULL;
799 spin_unlock_bh(&queue_lock);
800
801 while (buf) {
802 struct port *p_ptr;
803 struct user_port *up_ptr;
804 struct tipc_portid orig;
805 struct tipc_name_seq dseq;
806 void *usr_handle;
807 int connected;
808 int published;
809 u32 message_type;
810
811 struct sk_buff *next = buf->next;
812 struct tipc_msg *msg = buf_msg(buf);
813 u32 dref = msg_destport(msg);
814
815 message_type = msg_type(msg);
816 if (message_type > TIPC_DIRECT_MSG)
817 goto reject; /* Unsupported message type */
818
819 p_ptr = tipc_port_lock(dref);
820 if (!p_ptr)
821 goto reject; /* Port deleted while msg in queue */
822
823 orig.ref = msg_origport(msg);
824 orig.node = msg_orignode(msg);
825 up_ptr = p_ptr->user_port;
826 usr_handle = up_ptr->usr_handle;
827 connected = p_ptr->publ.connected;
828 published = p_ptr->publ.published;
829
830 if (unlikely(msg_errcode(msg)))
831 goto err;
832
833 switch (message_type) {
834
835 case TIPC_CONN_MSG:{
836 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
837 u32 peer_port = port_peerport(p_ptr);
838 u32 peer_node = port_peernode(p_ptr);
839
840 tipc_port_unlock(p_ptr);
841 if (unlikely(!connected)) {
842 if (unlikely(published))
843 goto reject;
844 tipc_connect2port(dref,&orig);
845 }
846 if (unlikely(msg_origport(msg) != peer_port))
847 goto reject;
848 if (unlikely(msg_orignode(msg) != peer_node))
849 goto reject;
850 if (unlikely(!cb))
851 goto reject;
852 if (unlikely(++p_ptr->publ.conn_unacked >=
853 TIPC_FLOW_CONTROL_WIN))
854 tipc_acknowledge(dref,
855 p_ptr->publ.conn_unacked);
856 skb_pull(buf, msg_hdr_sz(msg));
857 cb(usr_handle, dref, &buf, msg_data(msg),
858 msg_data_sz(msg));
859 break;
860 }
861 case TIPC_DIRECT_MSG:{
862 tipc_msg_event cb = up_ptr->msg_cb;
863
864 tipc_port_unlock(p_ptr);
865 if (unlikely(connected))
866 goto reject;
867 if (unlikely(!cb))
868 goto reject;
869 skb_pull(buf, msg_hdr_sz(msg));
870 cb(usr_handle, dref, &buf, msg_data(msg),
871 msg_data_sz(msg), msg_importance(msg),
872 &orig);
873 break;
874 }
875 case TIPC_MCAST_MSG:
876 case TIPC_NAMED_MSG:{
877 tipc_named_msg_event cb = up_ptr->named_msg_cb;
878
879 tipc_port_unlock(p_ptr);
880 if (unlikely(connected))
881 goto reject;
882 if (unlikely(!cb))
883 goto reject;
884 if (unlikely(!published))
885 goto reject;
886 dseq.type = msg_nametype(msg);
887 dseq.lower = msg_nameinst(msg);
888 dseq.upper = (message_type == TIPC_NAMED_MSG)
889 ? dseq.lower : msg_nameupper(msg);
890 skb_pull(buf, msg_hdr_sz(msg));
891 cb(usr_handle, dref, &buf, msg_data(msg),
892 msg_data_sz(msg), msg_importance(msg),
893 &orig, &dseq);
894 break;
895 }
896 }
897 if (buf)
898 buf_discard(buf);
899 buf = next;
900 continue;
901 err:
902 switch (message_type) {
903
904 case TIPC_CONN_MSG:{
905 tipc_conn_shutdown_event cb =
906 up_ptr->conn_err_cb;
907 u32 peer_port = port_peerport(p_ptr);
908 u32 peer_node = port_peernode(p_ptr);
909
910 tipc_port_unlock(p_ptr);
911 if (!connected || !cb)
912 break;
913 if (msg_origport(msg) != peer_port)
914 break;
915 if (msg_orignode(msg) != peer_node)
916 break;
917 tipc_disconnect(dref);
918 skb_pull(buf, msg_hdr_sz(msg));
919 cb(usr_handle, dref, &buf, msg_data(msg),
920 msg_data_sz(msg), msg_errcode(msg));
921 break;
922 }
923 case TIPC_DIRECT_MSG:{
924 tipc_msg_err_event cb = up_ptr->err_cb;
925
926 tipc_port_unlock(p_ptr);
927 if (connected || !cb)
928 break;
929 skb_pull(buf, msg_hdr_sz(msg));
930 cb(usr_handle, dref, &buf, msg_data(msg),
931 msg_data_sz(msg), msg_errcode(msg), &orig);
932 break;
933 }
934 case TIPC_MCAST_MSG:
935 case TIPC_NAMED_MSG:{
936 tipc_named_msg_err_event cb =
937 up_ptr->named_err_cb;
938
939 tipc_port_unlock(p_ptr);
940 if (connected || !cb)
941 break;
942 dseq.type = msg_nametype(msg);
943 dseq.lower = msg_nameinst(msg);
944 dseq.upper = (message_type == TIPC_NAMED_MSG)
945 ? dseq.lower : msg_nameupper(msg);
946 skb_pull(buf, msg_hdr_sz(msg));
947 cb(usr_handle, dref, &buf, msg_data(msg),
948 msg_data_sz(msg), msg_errcode(msg), &dseq);
949 break;
950 }
951 }
952 if (buf)
953 buf_discard(buf);
954 buf = next;
955 continue;
956 reject:
957 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
958 buf = next;
959 }
960 }
961
962 /*
963 * port_dispatcher(): Dispatcher for messages destinated
964 * to the tipc_port interface. Called with port locked.
965 */
966
967 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
968 {
969 buf->next = NULL;
970 spin_lock_bh(&queue_lock);
971 if (msg_queue_head) {
972 msg_queue_tail->next = buf;
973 msg_queue_tail = buf;
974 } else {
975 msg_queue_tail = msg_queue_head = buf;
976 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
977 }
978 spin_unlock_bh(&queue_lock);
979 return TIPC_OK;
980 }
981
982 /*
983 * Wake up port after congestion: Called with port locked,
984 *
985 */
986
987 static void port_wakeup_sh(unsigned long ref)
988 {
989 struct port *p_ptr;
990 struct user_port *up_ptr;
991 tipc_continue_event cb = NULL;
992 void *uh = NULL;
993
994 p_ptr = tipc_port_lock(ref);
995 if (p_ptr) {
996 up_ptr = p_ptr->user_port;
997 if (up_ptr) {
998 cb = up_ptr->continue_event_cb;
999 uh = up_ptr->usr_handle;
1000 }
1001 tipc_port_unlock(p_ptr);
1002 }
1003 if (cb)
1004 cb(uh, ref);
1005 }
1006
1007
1008 static void port_wakeup(struct tipc_port *p_ptr)
1009 {
1010 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
1011 }
1012
1013 void tipc_acknowledge(u32 ref, u32 ack)
1014 {
1015 struct port *p_ptr;
1016 struct sk_buff *buf = NULL;
1017
1018 p_ptr = tipc_port_lock(ref);
1019 if (!p_ptr)
1020 return;
1021 if (p_ptr->publ.connected) {
1022 p_ptr->publ.conn_unacked -= ack;
1023 buf = port_build_proto_msg(port_peerport(p_ptr),
1024 port_peernode(p_ptr),
1025 ref,
1026 tipc_own_addr,
1027 CONN_MANAGER,
1028 CONN_ACK,
1029 TIPC_OK,
1030 port_out_seqno(p_ptr),
1031 ack);
1032 }
1033 tipc_port_unlock(p_ptr);
1034 tipc_net_route_msg(buf);
1035 }
1036
1037 /*
1038 * tipc_createport(): user level call. Will add port to
1039 * registry if non-zero user_ref.
1040 */
1041
1042 int tipc_createport(u32 user_ref,
1043 void *usr_handle,
1044 unsigned int importance,
1045 tipc_msg_err_event error_cb,
1046 tipc_named_msg_err_event named_error_cb,
1047 tipc_conn_shutdown_event conn_error_cb,
1048 tipc_msg_event msg_cb,
1049 tipc_named_msg_event named_msg_cb,
1050 tipc_conn_msg_event conn_msg_cb,
1051 tipc_continue_event continue_event_cb,/* May be zero */
1052 u32 *portref)
1053 {
1054 struct user_port *up_ptr;
1055 struct port *p_ptr;
1056 u32 ref;
1057
1058 up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
1059 if (!up_ptr) {
1060 warn("Port creation failed, no memory\n");
1061 return -ENOMEM;
1062 }
1063 ref = tipc_createport_raw(NULL, port_dispatcher, port_wakeup, importance);
1064 p_ptr = tipc_port_lock(ref);
1065 if (!p_ptr) {
1066 kfree(up_ptr);
1067 return -ENOMEM;
1068 }
1069
1070 p_ptr->user_port = up_ptr;
1071 up_ptr->user_ref = user_ref;
1072 up_ptr->usr_handle = usr_handle;
1073 up_ptr->ref = p_ptr->publ.ref;
1074 up_ptr->err_cb = error_cb;
1075 up_ptr->named_err_cb = named_error_cb;
1076 up_ptr->conn_err_cb = conn_error_cb;
1077 up_ptr->msg_cb = msg_cb;
1078 up_ptr->named_msg_cb = named_msg_cb;
1079 up_ptr->conn_msg_cb = conn_msg_cb;
1080 up_ptr->continue_event_cb = continue_event_cb;
1081 INIT_LIST_HEAD(&up_ptr->uport_list);
1082 tipc_reg_add_port(up_ptr);
1083 *portref = p_ptr->publ.ref;
1084 dbg(" tipc_createport: %x with ref %u\n", p_ptr, p_ptr->publ.ref);
1085 tipc_port_unlock(p_ptr);
1086 return TIPC_OK;
1087 }
1088
1089 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
1090 {
1091 id->ref = ref;
1092 id->node = tipc_own_addr;
1093 return TIPC_OK;
1094 }
1095
1096 int tipc_portimportance(u32 ref, unsigned int *importance)
1097 {
1098 struct port *p_ptr;
1099
1100 p_ptr = tipc_port_lock(ref);
1101 if (!p_ptr)
1102 return -EINVAL;
1103 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1104 tipc_port_unlock(p_ptr);
1105 return TIPC_OK;
1106 }
1107
1108 int tipc_set_portimportance(u32 ref, unsigned int imp)
1109 {
1110 struct port *p_ptr;
1111
1112 if (imp > TIPC_CRITICAL_IMPORTANCE)
1113 return -EINVAL;
1114
1115 p_ptr = tipc_port_lock(ref);
1116 if (!p_ptr)
1117 return -EINVAL;
1118 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1119 tipc_port_unlock(p_ptr);
1120 return TIPC_OK;
1121 }
1122
1123
1124 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1125 {
1126 struct port *p_ptr;
1127 struct publication *publ;
1128 u32 key;
1129 int res = -EINVAL;
1130
1131 p_ptr = tipc_port_lock(ref);
1132 if (!p_ptr)
1133 return -EINVAL;
1134
1135 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1136 "lower = %u, upper = %u\n",
1137 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1138 if (p_ptr->publ.connected)
1139 goto exit;
1140 if (seq->lower > seq->upper)
1141 goto exit;
1142 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1143 goto exit;
1144 key = ref + p_ptr->pub_count + 1;
1145 if (key == ref) {
1146 res = -EADDRINUSE;
1147 goto exit;
1148 }
1149 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1150 scope, p_ptr->publ.ref, key);
1151 if (publ) {
1152 list_add(&publ->pport_list, &p_ptr->publications);
1153 p_ptr->pub_count++;
1154 p_ptr->publ.published = 1;
1155 res = TIPC_OK;
1156 }
1157 exit:
1158 tipc_port_unlock(p_ptr);
1159 return res;
1160 }
1161
1162 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1163 {
1164 struct port *p_ptr;
1165 struct publication *publ;
1166 struct publication *tpubl;
1167 int res = -EINVAL;
1168
1169 p_ptr = tipc_port_lock(ref);
1170 if (!p_ptr)
1171 return -EINVAL;
1172 if (!seq) {
1173 list_for_each_entry_safe(publ, tpubl,
1174 &p_ptr->publications, pport_list) {
1175 tipc_nametbl_withdraw(publ->type, publ->lower,
1176 publ->ref, publ->key);
1177 }
1178 res = TIPC_OK;
1179 } else {
1180 list_for_each_entry_safe(publ, tpubl,
1181 &p_ptr->publications, pport_list) {
1182 if (publ->scope != scope)
1183 continue;
1184 if (publ->type != seq->type)
1185 continue;
1186 if (publ->lower != seq->lower)
1187 continue;
1188 if (publ->upper != seq->upper)
1189 break;
1190 tipc_nametbl_withdraw(publ->type, publ->lower,
1191 publ->ref, publ->key);
1192 res = TIPC_OK;
1193 break;
1194 }
1195 }
1196 if (list_empty(&p_ptr->publications))
1197 p_ptr->publ.published = 0;
1198 tipc_port_unlock(p_ptr);
1199 return res;
1200 }
1201
1202 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1203 {
1204 struct port *p_ptr;
1205 struct tipc_msg *msg;
1206 int res = -EINVAL;
1207
1208 p_ptr = tipc_port_lock(ref);
1209 if (!p_ptr)
1210 return -EINVAL;
1211 if (p_ptr->publ.published || p_ptr->publ.connected)
1212 goto exit;
1213 if (!peer->ref)
1214 goto exit;
1215
1216 msg = &p_ptr->publ.phdr;
1217 msg_set_destnode(msg, peer->node);
1218 msg_set_destport(msg, peer->ref);
1219 msg_set_orignode(msg, tipc_own_addr);
1220 msg_set_origport(msg, p_ptr->publ.ref);
1221 msg_set_transp_seqno(msg, 42);
1222 msg_set_type(msg, TIPC_CONN_MSG);
1223 if (!may_route(peer->node))
1224 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1225 else
1226 msg_set_hdr_sz(msg, LONG_H_SIZE);
1227
1228 p_ptr->probing_interval = PROBING_INTERVAL;
1229 p_ptr->probing_state = CONFIRMED;
1230 p_ptr->publ.connected = 1;
1231 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1232
1233 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1234 (void *)(unsigned long)ref,
1235 (net_ev_handler)port_handle_node_down);
1236 res = TIPC_OK;
1237 exit:
1238 tipc_port_unlock(p_ptr);
1239 p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1240 return res;
1241 }
1242
1243 /**
1244 * tipc_disconnect_port - disconnect port from peer
1245 *
1246 * Port must be locked.
1247 */
1248
1249 int tipc_disconnect_port(struct tipc_port *tp_ptr)
1250 {
1251 int res;
1252
1253 if (tp_ptr->connected) {
1254 tp_ptr->connected = 0;
1255 /* let timer expire on it's own to avoid deadlock! */
1256 tipc_nodesub_unsubscribe(
1257 &((struct port *)tp_ptr)->subscription);
1258 res = TIPC_OK;
1259 } else {
1260 res = -ENOTCONN;
1261 }
1262 return res;
1263 }
1264
1265 /*
1266 * tipc_disconnect(): Disconnect port form peer.
1267 * This is a node local operation.
1268 */
1269
1270 int tipc_disconnect(u32 ref)
1271 {
1272 struct port *p_ptr;
1273 int res;
1274
1275 p_ptr = tipc_port_lock(ref);
1276 if (!p_ptr)
1277 return -EINVAL;
1278 res = tipc_disconnect_port((struct tipc_port *)p_ptr);
1279 tipc_port_unlock(p_ptr);
1280 return res;
1281 }
1282
1283 /*
1284 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1285 */
1286 int tipc_shutdown(u32 ref)
1287 {
1288 struct port *p_ptr;
1289 struct sk_buff *buf = NULL;
1290
1291 p_ptr = tipc_port_lock(ref);
1292 if (!p_ptr)
1293 return -EINVAL;
1294
1295 if (p_ptr->publ.connected) {
1296 u32 imp = msg_importance(&p_ptr->publ.phdr);
1297 if (imp < TIPC_CRITICAL_IMPORTANCE)
1298 imp++;
1299 buf = port_build_proto_msg(port_peerport(p_ptr),
1300 port_peernode(p_ptr),
1301 ref,
1302 tipc_own_addr,
1303 imp,
1304 TIPC_CONN_MSG,
1305 TIPC_CONN_SHUTDOWN,
1306 port_out_seqno(p_ptr),
1307 0);
1308 }
1309 tipc_port_unlock(p_ptr);
1310 tipc_net_route_msg(buf);
1311 return tipc_disconnect(ref);
1312 }
1313
1314 int tipc_isconnected(u32 ref, int *isconnected)
1315 {
1316 struct port *p_ptr;
1317
1318 p_ptr = tipc_port_lock(ref);
1319 if (!p_ptr)
1320 return -EINVAL;
1321 *isconnected = p_ptr->publ.connected;
1322 tipc_port_unlock(p_ptr);
1323 return TIPC_OK;
1324 }
1325
1326 int tipc_peer(u32 ref, struct tipc_portid *peer)
1327 {
1328 struct port *p_ptr;
1329 int res;
1330
1331 p_ptr = tipc_port_lock(ref);
1332 if (!p_ptr)
1333 return -EINVAL;
1334 if (p_ptr->publ.connected) {
1335 peer->ref = port_peerport(p_ptr);
1336 peer->node = port_peernode(p_ptr);
1337 res = TIPC_OK;
1338 } else
1339 res = -ENOTCONN;
1340 tipc_port_unlock(p_ptr);
1341 return res;
1342 }
1343
1344 int tipc_ref_valid(u32 ref)
1345 {
1346 /* Works irrespective of type */
1347 return !!tipc_ref_deref(ref);
1348 }
1349
1350
1351 /*
1352 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1353 * message for this node.
1354 */
1355
1356 int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1357 struct iovec const *msg_sect)
1358 {
1359 struct sk_buff *buf;
1360 int res;
1361
1362 res = msg_build(&sender->publ.phdr, msg_sect, num_sect,
1363 MAX_MSG_SIZE, !sender->user_port, &buf);
1364 if (likely(buf))
1365 tipc_port_recv_msg(buf);
1366 return res;
1367 }
1368
1369 /**
1370 * tipc_send - send message sections on connection
1371 */
1372
1373 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1374 {
1375 struct port *p_ptr;
1376 u32 destnode;
1377 int res;
1378
1379 p_ptr = tipc_port_deref(ref);
1380 if (!p_ptr || !p_ptr->publ.connected)
1381 return -EINVAL;
1382
1383 p_ptr->publ.congested = 1;
1384 if (!tipc_port_congested(p_ptr)) {
1385 destnode = port_peernode(p_ptr);
1386 if (likely(destnode != tipc_own_addr))
1387 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1388 destnode);
1389 else
1390 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1391
1392 if (likely(res != -ELINKCONG)) {
1393 port_incr_out_seqno(p_ptr);
1394 p_ptr->publ.congested = 0;
1395 p_ptr->sent++;
1396 return res;
1397 }
1398 }
1399 if (port_unreliable(p_ptr)) {
1400 p_ptr->publ.congested = 0;
1401 /* Just calculate msg length and return */
1402 return msg_calc_data_size(msg_sect, num_sect);
1403 }
1404 return -ELINKCONG;
1405 }
1406
1407 /**
1408 * tipc_send_buf - send message buffer on connection
1409 */
1410
1411 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1412 {
1413 struct port *p_ptr;
1414 struct tipc_msg *msg;
1415 u32 destnode;
1416 u32 hsz;
1417 u32 sz;
1418 u32 res;
1419
1420 p_ptr = tipc_port_deref(ref);
1421 if (!p_ptr || !p_ptr->publ.connected)
1422 return -EINVAL;
1423
1424 msg = &p_ptr->publ.phdr;
1425 hsz = msg_hdr_sz(msg);
1426 sz = hsz + dsz;
1427 msg_set_size(msg, sz);
1428 if (skb_cow(buf, hsz))
1429 return -ENOMEM;
1430
1431 skb_push(buf, hsz);
1432 skb_copy_to_linear_data(buf, msg, hsz);
1433 destnode = msg_destnode(msg);
1434 p_ptr->publ.congested = 1;
1435 if (!tipc_port_congested(p_ptr)) {
1436 if (likely(destnode != tipc_own_addr))
1437 res = tipc_send_buf_fast(buf, destnode);
1438 else {
1439 tipc_port_recv_msg(buf);
1440 res = sz;
1441 }
1442 if (likely(res != -ELINKCONG)) {
1443 port_incr_out_seqno(p_ptr);
1444 p_ptr->sent++;
1445 p_ptr->publ.congested = 0;
1446 return res;
1447 }
1448 }
1449 if (port_unreliable(p_ptr)) {
1450 p_ptr->publ.congested = 0;
1451 return dsz;
1452 }
1453 return -ELINKCONG;
1454 }
1455
1456 /**
1457 * tipc_forward2name - forward message sections to port name
1458 */
1459
1460 int tipc_forward2name(u32 ref,
1461 struct tipc_name const *name,
1462 u32 domain,
1463 u32 num_sect,
1464 struct iovec const *msg_sect,
1465 struct tipc_portid const *orig,
1466 unsigned int importance)
1467 {
1468 struct port *p_ptr;
1469 struct tipc_msg *msg;
1470 u32 destnode = domain;
1471 u32 destport = 0;
1472 int res;
1473
1474 p_ptr = tipc_port_deref(ref);
1475 if (!p_ptr || p_ptr->publ.connected)
1476 return -EINVAL;
1477
1478 msg = &p_ptr->publ.phdr;
1479 msg_set_type(msg, TIPC_NAMED_MSG);
1480 msg_set_orignode(msg, orig->node);
1481 msg_set_origport(msg, orig->ref);
1482 msg_set_hdr_sz(msg, LONG_H_SIZE);
1483 msg_set_nametype(msg, name->type);
1484 msg_set_nameinst(msg, name->instance);
1485 msg_set_lookup_scope(msg, addr_scope(domain));
1486 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1487 msg_set_importance(msg,importance);
1488 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1489 msg_set_destnode(msg, destnode);
1490 msg_set_destport(msg, destport);
1491
1492 if (likely(destport || destnode)) {
1493 p_ptr->sent++;
1494 if (likely(destnode == tipc_own_addr))
1495 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1496 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1497 destnode);
1498 if (likely(res != -ELINKCONG))
1499 return res;
1500 if (port_unreliable(p_ptr)) {
1501 /* Just calculate msg length and return */
1502 return msg_calc_data_size(msg_sect, num_sect);
1503 }
1504 return -ELINKCONG;
1505 }
1506 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1507 TIPC_ERR_NO_NAME);
1508 }
1509
1510 /**
1511 * tipc_send2name - send message sections to port name
1512 */
1513
1514 int tipc_send2name(u32 ref,
1515 struct tipc_name const *name,
1516 unsigned int domain,
1517 unsigned int num_sect,
1518 struct iovec const *msg_sect)
1519 {
1520 struct tipc_portid orig;
1521
1522 orig.ref = ref;
1523 orig.node = tipc_own_addr;
1524 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1525 TIPC_PORT_IMPORTANCE);
1526 }
1527
1528 /**
1529 * tipc_forward_buf2name - forward message buffer to port name
1530 */
1531
1532 int tipc_forward_buf2name(u32 ref,
1533 struct tipc_name const *name,
1534 u32 domain,
1535 struct sk_buff *buf,
1536 unsigned int dsz,
1537 struct tipc_portid const *orig,
1538 unsigned int importance)
1539 {
1540 struct port *p_ptr;
1541 struct tipc_msg *msg;
1542 u32 destnode = domain;
1543 u32 destport = 0;
1544 int res;
1545
1546 p_ptr = (struct port *)tipc_ref_deref(ref);
1547 if (!p_ptr || p_ptr->publ.connected)
1548 return -EINVAL;
1549
1550 msg = &p_ptr->publ.phdr;
1551 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1552 msg_set_importance(msg, importance);
1553 msg_set_type(msg, TIPC_NAMED_MSG);
1554 msg_set_orignode(msg, orig->node);
1555 msg_set_origport(msg, orig->ref);
1556 msg_set_nametype(msg, name->type);
1557 msg_set_nameinst(msg, name->instance);
1558 msg_set_lookup_scope(msg, addr_scope(domain));
1559 msg_set_hdr_sz(msg, LONG_H_SIZE);
1560 msg_set_size(msg, LONG_H_SIZE + dsz);
1561 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1562 msg_set_destnode(msg, destnode);
1563 msg_set_destport(msg, destport);
1564 msg_dbg(msg, "forw2name ==> ");
1565 if (skb_cow(buf, LONG_H_SIZE))
1566 return -ENOMEM;
1567 skb_push(buf, LONG_H_SIZE);
1568 skb_copy_to_linear_data(buf, msg, LONG_H_SIZE);
1569 msg_dbg(buf_msg(buf),"PREP:");
1570 if (likely(destport || destnode)) {
1571 p_ptr->sent++;
1572 if (destnode == tipc_own_addr)
1573 return tipc_port_recv_msg(buf);
1574 res = tipc_send_buf_fast(buf, destnode);
1575 if (likely(res != -ELINKCONG))
1576 return res;
1577 if (port_unreliable(p_ptr))
1578 return dsz;
1579 return -ELINKCONG;
1580 }
1581 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1582 }
1583
1584 /**
1585 * tipc_send_buf2name - send message buffer to port name
1586 */
1587
1588 int tipc_send_buf2name(u32 ref,
1589 struct tipc_name const *dest,
1590 u32 domain,
1591 struct sk_buff *buf,
1592 unsigned int dsz)
1593 {
1594 struct tipc_portid orig;
1595
1596 orig.ref = ref;
1597 orig.node = tipc_own_addr;
1598 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1599 TIPC_PORT_IMPORTANCE);
1600 }
1601
1602 /**
1603 * tipc_forward2port - forward message sections to port identity
1604 */
1605
1606 int tipc_forward2port(u32 ref,
1607 struct tipc_portid const *dest,
1608 unsigned int num_sect,
1609 struct iovec const *msg_sect,
1610 struct tipc_portid const *orig,
1611 unsigned int importance)
1612 {
1613 struct port *p_ptr;
1614 struct tipc_msg *msg;
1615 int res;
1616
1617 p_ptr = tipc_port_deref(ref);
1618 if (!p_ptr || p_ptr->publ.connected)
1619 return -EINVAL;
1620
1621 msg = &p_ptr->publ.phdr;
1622 msg_set_type(msg, TIPC_DIRECT_MSG);
1623 msg_set_orignode(msg, orig->node);
1624 msg_set_origport(msg, orig->ref);
1625 msg_set_destnode(msg, dest->node);
1626 msg_set_destport(msg, dest->ref);
1627 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1628 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1629 msg_set_importance(msg, importance);
1630 p_ptr->sent++;
1631 if (dest->node == tipc_own_addr)
1632 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1633 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1634 if (likely(res != -ELINKCONG))
1635 return res;
1636 if (port_unreliable(p_ptr)) {
1637 /* Just calculate msg length and return */
1638 return msg_calc_data_size(msg_sect, num_sect);
1639 }
1640 return -ELINKCONG;
1641 }
1642
1643 /**
1644 * tipc_send2port - send message sections to port identity
1645 */
1646
1647 int tipc_send2port(u32 ref,
1648 struct tipc_portid const *dest,
1649 unsigned int num_sect,
1650 struct iovec const *msg_sect)
1651 {
1652 struct tipc_portid orig;
1653
1654 orig.ref = ref;
1655 orig.node = tipc_own_addr;
1656 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1657 TIPC_PORT_IMPORTANCE);
1658 }
1659
1660 /**
1661 * tipc_forward_buf2port - forward message buffer to port identity
1662 */
1663 int tipc_forward_buf2port(u32 ref,
1664 struct tipc_portid const *dest,
1665 struct sk_buff *buf,
1666 unsigned int dsz,
1667 struct tipc_portid const *orig,
1668 unsigned int importance)
1669 {
1670 struct port *p_ptr;
1671 struct tipc_msg *msg;
1672 int res;
1673
1674 p_ptr = (struct port *)tipc_ref_deref(ref);
1675 if (!p_ptr || p_ptr->publ.connected)
1676 return -EINVAL;
1677
1678 msg = &p_ptr->publ.phdr;
1679 msg_set_type(msg, TIPC_DIRECT_MSG);
1680 msg_set_orignode(msg, orig->node);
1681 msg_set_origport(msg, orig->ref);
1682 msg_set_destnode(msg, dest->node);
1683 msg_set_destport(msg, dest->ref);
1684 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1685 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1686 msg_set_importance(msg, importance);
1687 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1688 if (skb_cow(buf, DIR_MSG_H_SIZE))
1689 return -ENOMEM;
1690
1691 skb_push(buf, DIR_MSG_H_SIZE);
1692 skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1693 msg_dbg(msg, "buf2port: ");
1694 p_ptr->sent++;
1695 if (dest->node == tipc_own_addr)
1696 return tipc_port_recv_msg(buf);
1697 res = tipc_send_buf_fast(buf, dest->node);
1698 if (likely(res != -ELINKCONG))
1699 return res;
1700 if (port_unreliable(p_ptr))
1701 return dsz;
1702 return -ELINKCONG;
1703 }
1704
1705 /**
1706 * tipc_send_buf2port - send message buffer to port identity
1707 */
1708
1709 int tipc_send_buf2port(u32 ref,
1710 struct tipc_portid const *dest,
1711 struct sk_buff *buf,
1712 unsigned int dsz)
1713 {
1714 struct tipc_portid orig;
1715
1716 orig.ref = ref;
1717 orig.node = tipc_own_addr;
1718 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1719 TIPC_PORT_IMPORTANCE);
1720 }
1721
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