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[TIPC]: Allow ports to receive multicast messages through native API.
[deliverable/linux.git] / net / tipc / port.c
1 /*
2 * net/tipc/port.c: TIPC port code
3 *
4 * Copyright (c) 1992-2006, Ericsson AB
5 * Copyright (c) 2004-2005, 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 "port.h"
45 #include "name_table.h"
46 #include "user_reg.h"
47 #include "msg.h"
48 #include "bcast.h"
49
50 /* Connection management: */
51 #define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
52 #define CONFIRMED 0
53 #define PROBING 1
54
55 #define MAX_REJECT_SIZE 1024
56
57 static struct sk_buff *msg_queue_head = NULL;
58 static struct sk_buff *msg_queue_tail = NULL;
59
60 spinlock_t tipc_port_list_lock = SPIN_LOCK_UNLOCKED;
61 static spinlock_t queue_lock = SPIN_LOCK_UNLOCKED;
62
63 static LIST_HEAD(ports);
64 static void port_handle_node_down(unsigned long ref);
65 static struct sk_buff* port_build_self_abort_msg(struct port *,u32 err);
66 static struct sk_buff* port_build_peer_abort_msg(struct port *,u32 err);
67 static void port_timeout(unsigned long ref);
68
69
70 static u32 port_peernode(struct port *p_ptr)
71 {
72 return msg_destnode(&p_ptr->publ.phdr);
73 }
74
75 static u32 port_peerport(struct port *p_ptr)
76 {
77 return msg_destport(&p_ptr->publ.phdr);
78 }
79
80 static u32 port_out_seqno(struct port *p_ptr)
81 {
82 return msg_transp_seqno(&p_ptr->publ.phdr);
83 }
84
85 static void port_incr_out_seqno(struct port *p_ptr)
86 {
87 struct tipc_msg *m = &p_ptr->publ.phdr;
88
89 if (likely(!msg_routed(m)))
90 return;
91 msg_set_transp_seqno(m, (msg_transp_seqno(m) + 1));
92 }
93
94 /**
95 * tipc_multicast - send a multicast message to local and remote destinations
96 */
97
98 int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, u32 domain,
99 u32 num_sect, struct iovec const *msg_sect)
100 {
101 struct tipc_msg *hdr;
102 struct sk_buff *buf;
103 struct sk_buff *ibuf = NULL;
104 struct port_list dports = {0, NULL, };
105 struct port *oport = tipc_port_deref(ref);
106 int ext_targets;
107 int res;
108
109 if (unlikely(!oport))
110 return -EINVAL;
111
112 /* Create multicast message */
113
114 hdr = &oport->publ.phdr;
115 msg_set_type(hdr, TIPC_MCAST_MSG);
116 msg_set_nametype(hdr, seq->type);
117 msg_set_namelower(hdr, seq->lower);
118 msg_set_nameupper(hdr, seq->upper);
119 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
120 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
121 !oport->user_port, &buf);
122 if (unlikely(!buf))
123 return res;
124
125 /* Figure out where to send multicast message */
126
127 ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
128 TIPC_NODE_SCOPE, &dports);
129
130 /* Send message to destinations (duplicate it only if necessary) */
131
132 if (ext_targets) {
133 if (dports.count != 0) {
134 ibuf = skb_copy(buf, GFP_ATOMIC);
135 if (ibuf == NULL) {
136 tipc_port_list_free(&dports);
137 buf_discard(buf);
138 return -ENOMEM;
139 }
140 }
141 res = tipc_bclink_send_msg(buf);
142 if ((res < 0) && (dports.count != 0)) {
143 buf_discard(ibuf);
144 }
145 } else {
146 ibuf = buf;
147 }
148
149 if (res >= 0) {
150 if (ibuf)
151 tipc_port_recv_mcast(ibuf, &dports);
152 } else {
153 tipc_port_list_free(&dports);
154 }
155 return res;
156 }
157
158 /**
159 * tipc_port_recv_mcast - deliver multicast message to all destination ports
160 *
161 * If there is no port list, perform a lookup to create one
162 */
163
164 void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
165 {
166 struct tipc_msg* msg;
167 struct port_list dports = {0, NULL, };
168 struct port_list *item = dp;
169 int cnt = 0;
170
171 assert(buf);
172 msg = buf_msg(buf);
173
174 /* Create destination port list, if one wasn't supplied */
175
176 if (dp == NULL) {
177 tipc_nametbl_mc_translate(msg_nametype(msg),
178 msg_namelower(msg),
179 msg_nameupper(msg),
180 TIPC_CLUSTER_SCOPE,
181 &dports);
182 item = dp = &dports;
183 }
184
185 /* Deliver a copy of message to each destination port */
186
187 if (dp->count != 0) {
188 if (dp->count == 1) {
189 msg_set_destport(msg, dp->ports[0]);
190 tipc_port_recv_msg(buf);
191 tipc_port_list_free(dp);
192 return;
193 }
194 for (; cnt < dp->count; cnt++) {
195 int index = cnt % PLSIZE;
196 struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
197
198 if (b == NULL) {
199 warn("Buffer allocation failure\n");
200 msg_dbg(msg, "LOST:");
201 goto exit;
202 }
203 if ((index == 0) && (cnt != 0)) {
204 item = item->next;
205 }
206 msg_set_destport(buf_msg(b),item->ports[index]);
207 tipc_port_recv_msg(b);
208 }
209 }
210 exit:
211 buf_discard(buf);
212 tipc_port_list_free(dp);
213 }
214
215 /**
216 * tipc_createport_raw - create a native TIPC port
217 *
218 * Returns local port reference
219 */
220
221 u32 tipc_createport_raw(void *usr_handle,
222 u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
223 void (*wakeup)(struct tipc_port *),
224 const u32 importance)
225 {
226 struct port *p_ptr;
227 struct tipc_msg *msg;
228 u32 ref;
229
230 p_ptr = kmalloc(sizeof(*p_ptr), GFP_ATOMIC);
231 if (p_ptr == NULL) {
232 warn("Memory squeeze; failed to create port\n");
233 return 0;
234 }
235 memset(p_ptr, 0, sizeof(*p_ptr));
236 ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
237 if (!ref) {
238 warn("Reference Table Exhausted\n");
239 kfree(p_ptr);
240 return 0;
241 }
242
243 tipc_port_lock(ref);
244 p_ptr->publ.ref = ref;
245 msg = &p_ptr->publ.phdr;
246 msg_init(msg, DATA_LOW, TIPC_NAMED_MSG, TIPC_OK, LONG_H_SIZE, 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 p_ptr->publ.usr_handle = usr_handle;
254 INIT_LIST_HEAD(&p_ptr->wait_list);
255 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
256 p_ptr->congested_link = NULL;
257 p_ptr->max_pkt = MAX_PKT_DEFAULT;
258 p_ptr->dispatcher = dispatcher;
259 p_ptr->wakeup = wakeup;
260 p_ptr->user_port = NULL;
261 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
262 spin_lock_bh(&tipc_port_list_lock);
263 INIT_LIST_HEAD(&p_ptr->publications);
264 INIT_LIST_HEAD(&p_ptr->port_list);
265 list_add_tail(&p_ptr->port_list, &ports);
266 spin_unlock_bh(&tipc_port_list_lock);
267 tipc_port_unlock(p_ptr);
268 return ref;
269 }
270
271 int tipc_deleteport(u32 ref)
272 {
273 struct port *p_ptr;
274 struct sk_buff *buf = NULL;
275
276 tipc_withdraw(ref, 0, NULL);
277 p_ptr = tipc_port_lock(ref);
278 if (!p_ptr)
279 return -EINVAL;
280
281 tipc_ref_discard(ref);
282 tipc_port_unlock(p_ptr);
283
284 k_cancel_timer(&p_ptr->timer);
285 if (p_ptr->publ.connected) {
286 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
287 tipc_nodesub_unsubscribe(&p_ptr->subscription);
288 }
289 if (p_ptr->user_port) {
290 tipc_reg_remove_port(p_ptr->user_port);
291 kfree(p_ptr->user_port);
292 }
293
294 spin_lock_bh(&tipc_port_list_lock);
295 list_del(&p_ptr->port_list);
296 list_del(&p_ptr->wait_list);
297 spin_unlock_bh(&tipc_port_list_lock);
298 k_term_timer(&p_ptr->timer);
299 kfree(p_ptr);
300 dbg("Deleted port %u\n", ref);
301 tipc_net_route_msg(buf);
302 return TIPC_OK;
303 }
304
305 /**
306 * tipc_get_port() - return port associated with 'ref'
307 *
308 * Note: Port is not locked.
309 */
310
311 struct tipc_port *tipc_get_port(const u32 ref)
312 {
313 return (struct tipc_port *)tipc_ref_deref(ref);
314 }
315
316 /**
317 * tipc_get_handle - return user handle associated to port 'ref'
318 */
319
320 void *tipc_get_handle(const u32 ref)
321 {
322 struct port *p_ptr;
323 void * handle;
324
325 p_ptr = tipc_port_lock(ref);
326 if (!p_ptr)
327 return NULL;
328 handle = p_ptr->publ.usr_handle;
329 tipc_port_unlock(p_ptr);
330 return handle;
331 }
332
333 static int port_unreliable(struct port *p_ptr)
334 {
335 return msg_src_droppable(&p_ptr->publ.phdr);
336 }
337
338 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
339 {
340 struct port *p_ptr;
341
342 p_ptr = tipc_port_lock(ref);
343 if (!p_ptr)
344 return -EINVAL;
345 *isunreliable = port_unreliable(p_ptr);
346 spin_unlock_bh(p_ptr->publ.lock);
347 return TIPC_OK;
348 }
349
350 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
351 {
352 struct port *p_ptr;
353
354 p_ptr = tipc_port_lock(ref);
355 if (!p_ptr)
356 return -EINVAL;
357 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
358 tipc_port_unlock(p_ptr);
359 return TIPC_OK;
360 }
361
362 static int port_unreturnable(struct port *p_ptr)
363 {
364 return msg_dest_droppable(&p_ptr->publ.phdr);
365 }
366
367 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
368 {
369 struct port *p_ptr;
370
371 p_ptr = tipc_port_lock(ref);
372 if (!p_ptr)
373 return -EINVAL;
374 *isunrejectable = port_unreturnable(p_ptr);
375 spin_unlock_bh(p_ptr->publ.lock);
376 return TIPC_OK;
377 }
378
379 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
380 {
381 struct port *p_ptr;
382
383 p_ptr = tipc_port_lock(ref);
384 if (!p_ptr)
385 return -EINVAL;
386 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
387 tipc_port_unlock(p_ptr);
388 return TIPC_OK;
389 }
390
391 /*
392 * port_build_proto_msg(): build a port level protocol
393 * or a connection abortion message. Called with
394 * tipc_port lock on.
395 */
396 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
397 u32 origport, u32 orignode,
398 u32 usr, u32 type, u32 err,
399 u32 seqno, u32 ack)
400 {
401 struct sk_buff *buf;
402 struct tipc_msg *msg;
403
404 buf = buf_acquire(LONG_H_SIZE);
405 if (buf) {
406 msg = buf_msg(buf);
407 msg_init(msg, usr, type, err, LONG_H_SIZE, destnode);
408 msg_set_destport(msg, destport);
409 msg_set_origport(msg, origport);
410 msg_set_destnode(msg, destnode);
411 msg_set_orignode(msg, orignode);
412 msg_set_transp_seqno(msg, seqno);
413 msg_set_msgcnt(msg, ack);
414 msg_dbg(msg, "PORT>SEND>:");
415 }
416 return buf;
417 }
418
419 int tipc_set_msg_option(struct tipc_port *tp_ptr, const char *opt, const u32 sz)
420 {
421 msg_expand(&tp_ptr->phdr, msg_destnode(&tp_ptr->phdr));
422 msg_set_options(&tp_ptr->phdr, opt, sz);
423 return TIPC_OK;
424 }
425
426 int tipc_reject_msg(struct sk_buff *buf, u32 err)
427 {
428 struct tipc_msg *msg = buf_msg(buf);
429 struct sk_buff *rbuf;
430 struct tipc_msg *rmsg;
431 int hdr_sz;
432 u32 imp = msg_importance(msg);
433 u32 data_sz = msg_data_sz(msg);
434
435 if (data_sz > MAX_REJECT_SIZE)
436 data_sz = MAX_REJECT_SIZE;
437 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
438 imp++;
439 msg_dbg(msg, "port->rej: ");
440
441 /* discard rejected message if it shouldn't be returned to sender */
442 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
443 buf_discard(buf);
444 return data_sz;
445 }
446
447 /* construct rejected message */
448 if (msg_mcast(msg))
449 hdr_sz = MCAST_H_SIZE;
450 else
451 hdr_sz = LONG_H_SIZE;
452 rbuf = buf_acquire(data_sz + hdr_sz);
453 if (rbuf == NULL) {
454 buf_discard(buf);
455 return data_sz;
456 }
457 rmsg = buf_msg(rbuf);
458 msg_init(rmsg, imp, msg_type(msg), err, hdr_sz, msg_orignode(msg));
459 msg_set_destport(rmsg, msg_origport(msg));
460 msg_set_prevnode(rmsg, tipc_own_addr);
461 msg_set_origport(rmsg, msg_destport(msg));
462 if (msg_short(msg))
463 msg_set_orignode(rmsg, tipc_own_addr);
464 else
465 msg_set_orignode(rmsg, msg_destnode(msg));
466 msg_set_size(rmsg, data_sz + hdr_sz);
467 msg_set_nametype(rmsg, msg_nametype(msg));
468 msg_set_nameinst(rmsg, msg_nameinst(msg));
469 memcpy(rbuf->data + hdr_sz, msg_data(msg), data_sz);
470
471 /* send self-abort message when rejecting on a connected port */
472 if (msg_connected(msg)) {
473 struct sk_buff *abuf = NULL;
474 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
475
476 if (p_ptr) {
477 if (p_ptr->publ.connected)
478 abuf = port_build_self_abort_msg(p_ptr, err);
479 tipc_port_unlock(p_ptr);
480 }
481 tipc_net_route_msg(abuf);
482 }
483
484 /* send rejected message */
485 buf_discard(buf);
486 tipc_net_route_msg(rbuf);
487 return data_sz;
488 }
489
490 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
491 struct iovec const *msg_sect, u32 num_sect,
492 int err)
493 {
494 struct sk_buff *buf;
495 int res;
496
497 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
498 !p_ptr->user_port, &buf);
499 if (!buf)
500 return res;
501
502 return tipc_reject_msg(buf, err);
503 }
504
505 static void port_timeout(unsigned long ref)
506 {
507 struct port *p_ptr = tipc_port_lock(ref);
508 struct sk_buff *buf = NULL;
509
510 if (!p_ptr || !p_ptr->publ.connected)
511 return;
512
513 /* Last probe answered ? */
514 if (p_ptr->probing_state == PROBING) {
515 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
516 } else {
517 buf = port_build_proto_msg(port_peerport(p_ptr),
518 port_peernode(p_ptr),
519 p_ptr->publ.ref,
520 tipc_own_addr,
521 CONN_MANAGER,
522 CONN_PROBE,
523 TIPC_OK,
524 port_out_seqno(p_ptr),
525 0);
526 port_incr_out_seqno(p_ptr);
527 p_ptr->probing_state = PROBING;
528 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
529 }
530 tipc_port_unlock(p_ptr);
531 tipc_net_route_msg(buf);
532 }
533
534
535 static void port_handle_node_down(unsigned long ref)
536 {
537 struct port *p_ptr = tipc_port_lock(ref);
538 struct sk_buff* buf = NULL;
539
540 if (!p_ptr)
541 return;
542 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
543 tipc_port_unlock(p_ptr);
544 tipc_net_route_msg(buf);
545 }
546
547
548 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
549 {
550 u32 imp = msg_importance(&p_ptr->publ.phdr);
551
552 if (!p_ptr->publ.connected)
553 return NULL;
554 if (imp < TIPC_CRITICAL_IMPORTANCE)
555 imp++;
556 return port_build_proto_msg(p_ptr->publ.ref,
557 tipc_own_addr,
558 port_peerport(p_ptr),
559 port_peernode(p_ptr),
560 imp,
561 TIPC_CONN_MSG,
562 err,
563 p_ptr->last_in_seqno + 1,
564 0);
565 }
566
567
568 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
569 {
570 u32 imp = msg_importance(&p_ptr->publ.phdr);
571
572 if (!p_ptr->publ.connected)
573 return NULL;
574 if (imp < TIPC_CRITICAL_IMPORTANCE)
575 imp++;
576 return port_build_proto_msg(port_peerport(p_ptr),
577 port_peernode(p_ptr),
578 p_ptr->publ.ref,
579 tipc_own_addr,
580 imp,
581 TIPC_CONN_MSG,
582 err,
583 port_out_seqno(p_ptr),
584 0);
585 }
586
587 void tipc_port_recv_proto_msg(struct sk_buff *buf)
588 {
589 struct tipc_msg *msg = buf_msg(buf);
590 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
591 u32 err = TIPC_OK;
592 struct sk_buff *r_buf = NULL;
593 struct sk_buff *abort_buf = NULL;
594
595 msg_dbg(msg, "PORT<RECV<:");
596
597 if (!p_ptr) {
598 err = TIPC_ERR_NO_PORT;
599 } else if (p_ptr->publ.connected) {
600 if (port_peernode(p_ptr) != msg_orignode(msg))
601 err = TIPC_ERR_NO_PORT;
602 if (port_peerport(p_ptr) != msg_origport(msg))
603 err = TIPC_ERR_NO_PORT;
604 if (!err && msg_routed(msg)) {
605 u32 seqno = msg_transp_seqno(msg);
606 u32 myno = ++p_ptr->last_in_seqno;
607 if (seqno != myno) {
608 err = TIPC_ERR_NO_PORT;
609 abort_buf = port_build_self_abort_msg(p_ptr, err);
610 }
611 }
612 if (msg_type(msg) == CONN_ACK) {
613 int wakeup = tipc_port_congested(p_ptr) &&
614 p_ptr->publ.congested &&
615 p_ptr->wakeup;
616 p_ptr->acked += msg_msgcnt(msg);
617 if (tipc_port_congested(p_ptr))
618 goto exit;
619 p_ptr->publ.congested = 0;
620 if (!wakeup)
621 goto exit;
622 p_ptr->wakeup(&p_ptr->publ);
623 goto exit;
624 }
625 } else if (p_ptr->publ.published) {
626 err = TIPC_ERR_NO_PORT;
627 }
628 if (err) {
629 r_buf = port_build_proto_msg(msg_origport(msg),
630 msg_orignode(msg),
631 msg_destport(msg),
632 tipc_own_addr,
633 DATA_HIGH,
634 TIPC_CONN_MSG,
635 err,
636 0,
637 0);
638 goto exit;
639 }
640
641 /* All is fine */
642 if (msg_type(msg) == CONN_PROBE) {
643 r_buf = port_build_proto_msg(msg_origport(msg),
644 msg_orignode(msg),
645 msg_destport(msg),
646 tipc_own_addr,
647 CONN_MANAGER,
648 CONN_PROBE_REPLY,
649 TIPC_OK,
650 port_out_seqno(p_ptr),
651 0);
652 }
653 p_ptr->probing_state = CONFIRMED;
654 port_incr_out_seqno(p_ptr);
655 exit:
656 if (p_ptr)
657 tipc_port_unlock(p_ptr);
658 tipc_net_route_msg(r_buf);
659 tipc_net_route_msg(abort_buf);
660 buf_discard(buf);
661 }
662
663 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
664 {
665 struct publication *publ;
666
667 if (full_id)
668 tipc_printf(buf, "<%u.%u.%u:%u>:",
669 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
670 tipc_node(tipc_own_addr), p_ptr->publ.ref);
671 else
672 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
673
674 if (p_ptr->publ.connected) {
675 u32 dport = port_peerport(p_ptr);
676 u32 destnode = port_peernode(p_ptr);
677
678 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
679 tipc_zone(destnode), tipc_cluster(destnode),
680 tipc_node(destnode), dport);
681 if (p_ptr->publ.conn_type != 0)
682 tipc_printf(buf, " via {%u,%u}",
683 p_ptr->publ.conn_type,
684 p_ptr->publ.conn_instance);
685 }
686 else if (p_ptr->publ.published) {
687 tipc_printf(buf, " bound to");
688 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
689 if (publ->lower == publ->upper)
690 tipc_printf(buf, " {%u,%u}", publ->type,
691 publ->lower);
692 else
693 tipc_printf(buf, " {%u,%u,%u}", publ->type,
694 publ->lower, publ->upper);
695 }
696 }
697 tipc_printf(buf, "\n");
698 }
699
700 #define MAX_PORT_QUERY 32768
701
702 struct sk_buff *tipc_port_get_ports(void)
703 {
704 struct sk_buff *buf;
705 struct tlv_desc *rep_tlv;
706 struct print_buf pb;
707 struct port *p_ptr;
708 int str_len;
709
710 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
711 if (!buf)
712 return NULL;
713 rep_tlv = (struct tlv_desc *)buf->data;
714
715 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
716 spin_lock_bh(&tipc_port_list_lock);
717 list_for_each_entry(p_ptr, &ports, port_list) {
718 spin_lock_bh(p_ptr->publ.lock);
719 port_print(p_ptr, &pb, 0);
720 spin_unlock_bh(p_ptr->publ.lock);
721 }
722 spin_unlock_bh(&tipc_port_list_lock);
723 str_len = tipc_printbuf_validate(&pb);
724
725 skb_put(buf, TLV_SPACE(str_len));
726 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
727
728 return buf;
729 }
730
731 #if 0
732
733 #define MAX_PORT_STATS 2000
734
735 struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
736 {
737 u32 ref;
738 struct port *p_ptr;
739 struct sk_buff *buf;
740 struct tlv_desc *rep_tlv;
741 struct print_buf pb;
742 int str_len;
743
744 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
745 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
746
747 ref = *(u32 *)TLV_DATA(req_tlv_area);
748 ref = ntohl(ref);
749
750 p_ptr = tipc_port_lock(ref);
751 if (!p_ptr)
752 return cfg_reply_error_string("port not found");
753
754 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
755 if (!buf) {
756 tipc_port_unlock(p_ptr);
757 return NULL;
758 }
759 rep_tlv = (struct tlv_desc *)buf->data;
760
761 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
762 port_print(p_ptr, &pb, 1);
763 /* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
764 tipc_port_unlock(p_ptr);
765 str_len = tipc_printbuf_validate(&pb);
766
767 skb_put(buf, TLV_SPACE(str_len));
768 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
769
770 return buf;
771 }
772
773 #endif
774
775 void tipc_port_reinit(void)
776 {
777 struct port *p_ptr;
778 struct tipc_msg *msg;
779
780 spin_lock_bh(&tipc_port_list_lock);
781 list_for_each_entry(p_ptr, &ports, port_list) {
782 msg = &p_ptr->publ.phdr;
783 if (msg_orignode(msg) == tipc_own_addr)
784 break;
785 msg_set_orignode(msg, tipc_own_addr);
786 }
787 spin_unlock_bh(&tipc_port_list_lock);
788 }
789
790
791 /*
792 * port_dispatcher_sigh(): Signal handler for messages destinated
793 * to the tipc_port interface.
794 */
795
796 static void port_dispatcher_sigh(void *dummy)
797 {
798 struct sk_buff *buf;
799
800 spin_lock_bh(&queue_lock);
801 buf = msg_queue_head;
802 msg_queue_head = NULL;
803 spin_unlock_bh(&queue_lock);
804
805 while (buf) {
806 struct port *p_ptr;
807 struct user_port *up_ptr;
808 struct tipc_portid orig;
809 struct tipc_name_seq dseq;
810 void *usr_handle;
811 int connected;
812 int published;
813 u32 message_type;
814
815 struct sk_buff *next = buf->next;
816 struct tipc_msg *msg = buf_msg(buf);
817 u32 dref = msg_destport(msg);
818
819 message_type = msg_type(msg);
820 if (message_type > TIPC_DIRECT_MSG)
821 goto reject; /* Unsupported message type */
822
823 p_ptr = tipc_port_lock(dref);
824 if (!p_ptr)
825 goto reject; /* Port deleted while msg in queue */
826
827 orig.ref = msg_origport(msg);
828 orig.node = msg_orignode(msg);
829 up_ptr = p_ptr->user_port;
830 usr_handle = up_ptr->usr_handle;
831 connected = p_ptr->publ.connected;
832 published = p_ptr->publ.published;
833
834 if (unlikely(msg_errcode(msg)))
835 goto err;
836
837 switch (message_type) {
838
839 case TIPC_CONN_MSG:{
840 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
841 u32 peer_port = port_peerport(p_ptr);
842 u32 peer_node = port_peernode(p_ptr);
843
844 spin_unlock_bh(p_ptr->publ.lock);
845 if (unlikely(!connected)) {
846 if (unlikely(published))
847 goto reject;
848 tipc_connect2port(dref,&orig);
849 }
850 if (unlikely(msg_origport(msg) != peer_port))
851 goto reject;
852 if (unlikely(msg_orignode(msg) != peer_node))
853 goto reject;
854 if (unlikely(!cb))
855 goto reject;
856 if (unlikely(++p_ptr->publ.conn_unacked >=
857 TIPC_FLOW_CONTROL_WIN))
858 tipc_acknowledge(dref,
859 p_ptr->publ.conn_unacked);
860 skb_pull(buf, msg_hdr_sz(msg));
861 cb(usr_handle, dref, &buf, msg_data(msg),
862 msg_data_sz(msg));
863 break;
864 }
865 case TIPC_DIRECT_MSG:{
866 tipc_msg_event cb = up_ptr->msg_cb;
867
868 spin_unlock_bh(p_ptr->publ.lock);
869 if (unlikely(connected))
870 goto reject;
871 if (unlikely(!cb))
872 goto reject;
873 skb_pull(buf, msg_hdr_sz(msg));
874 cb(usr_handle, dref, &buf, msg_data(msg),
875 msg_data_sz(msg), msg_importance(msg),
876 &orig);
877 break;
878 }
879 case TIPC_MCAST_MSG:
880 case TIPC_NAMED_MSG:{
881 tipc_named_msg_event cb = up_ptr->named_msg_cb;
882
883 spin_unlock_bh(p_ptr->publ.lock);
884 if (unlikely(connected))
885 goto reject;
886 if (unlikely(!cb))
887 goto reject;
888 if (unlikely(!published))
889 goto reject;
890 dseq.type = msg_nametype(msg);
891 dseq.lower = msg_nameinst(msg);
892 dseq.upper = (message_type == TIPC_NAMED_MSG)
893 ? dseq.lower : msg_nameupper(msg);
894 skb_pull(buf, msg_hdr_sz(msg));
895 cb(usr_handle, dref, &buf, msg_data(msg),
896 msg_data_sz(msg), msg_importance(msg),
897 &orig, &dseq);
898 break;
899 }
900 }
901 if (buf)
902 buf_discard(buf);
903 buf = next;
904 continue;
905 err:
906 switch (message_type) {
907
908 case TIPC_CONN_MSG:{
909 tipc_conn_shutdown_event cb =
910 up_ptr->conn_err_cb;
911 u32 peer_port = port_peerport(p_ptr);
912 u32 peer_node = port_peernode(p_ptr);
913
914 spin_unlock_bh(p_ptr->publ.lock);
915 if (!connected || !cb)
916 break;
917 if (msg_origport(msg) != peer_port)
918 break;
919 if (msg_orignode(msg) != peer_node)
920 break;
921 tipc_disconnect(dref);
922 skb_pull(buf, msg_hdr_sz(msg));
923 cb(usr_handle, dref, &buf, msg_data(msg),
924 msg_data_sz(msg), msg_errcode(msg));
925 break;
926 }
927 case TIPC_DIRECT_MSG:{
928 tipc_msg_err_event cb = up_ptr->err_cb;
929
930 spin_unlock_bh(p_ptr->publ.lock);
931 if (connected || !cb)
932 break;
933 skb_pull(buf, msg_hdr_sz(msg));
934 cb(usr_handle, dref, &buf, msg_data(msg),
935 msg_data_sz(msg), msg_errcode(msg), &orig);
936 break;
937 }
938 case TIPC_MCAST_MSG:
939 case TIPC_NAMED_MSG:{
940 tipc_named_msg_err_event cb =
941 up_ptr->named_err_cb;
942
943 spin_unlock_bh(p_ptr->publ.lock);
944 if (connected || !cb)
945 break;
946 dseq.type = msg_nametype(msg);
947 dseq.lower = msg_nameinst(msg);
948 dseq.upper = (message_type == TIPC_NAMED_MSG)
949 ? dseq.lower : msg_nameupper(msg);
950 skb_pull(buf, msg_hdr_sz(msg));
951 cb(usr_handle, dref, &buf, msg_data(msg),
952 msg_data_sz(msg), msg_errcode(msg), &dseq);
953 break;
954 }
955 }
956 if (buf)
957 buf_discard(buf);
958 buf = next;
959 continue;
960 reject:
961 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
962 buf = next;
963 }
964 }
965
966 /*
967 * port_dispatcher(): Dispatcher for messages destinated
968 * to the tipc_port interface. Called with port locked.
969 */
970
971 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
972 {
973 buf->next = NULL;
974 spin_lock_bh(&queue_lock);
975 if (msg_queue_head) {
976 msg_queue_tail->next = buf;
977 msg_queue_tail = buf;
978 } else {
979 msg_queue_tail = msg_queue_head = buf;
980 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
981 }
982 spin_unlock_bh(&queue_lock);
983 return TIPC_OK;
984 }
985
986 /*
987 * Wake up port after congestion: Called with port locked,
988 *
989 */
990
991 static void port_wakeup_sh(unsigned long ref)
992 {
993 struct port *p_ptr;
994 struct user_port *up_ptr;
995 tipc_continue_event cb = NULL;
996 void *uh = NULL;
997
998 p_ptr = tipc_port_lock(ref);
999 if (p_ptr) {
1000 up_ptr = p_ptr->user_port;
1001 if (up_ptr) {
1002 cb = up_ptr->continue_event_cb;
1003 uh = up_ptr->usr_handle;
1004 }
1005 tipc_port_unlock(p_ptr);
1006 }
1007 if (cb)
1008 cb(uh, ref);
1009 }
1010
1011
1012 static void port_wakeup(struct tipc_port *p_ptr)
1013 {
1014 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
1015 }
1016
1017 void tipc_acknowledge(u32 ref, u32 ack)
1018 {
1019 struct port *p_ptr;
1020 struct sk_buff *buf = NULL;
1021
1022 p_ptr = tipc_port_lock(ref);
1023 if (!p_ptr)
1024 return;
1025 if (p_ptr->publ.connected) {
1026 p_ptr->publ.conn_unacked -= ack;
1027 buf = port_build_proto_msg(port_peerport(p_ptr),
1028 port_peernode(p_ptr),
1029 ref,
1030 tipc_own_addr,
1031 CONN_MANAGER,
1032 CONN_ACK,
1033 TIPC_OK,
1034 port_out_seqno(p_ptr),
1035 ack);
1036 }
1037 tipc_port_unlock(p_ptr);
1038 tipc_net_route_msg(buf);
1039 }
1040
1041 /*
1042 * tipc_createport(): user level call. Will add port to
1043 * registry if non-zero user_ref.
1044 */
1045
1046 int tipc_createport(u32 user_ref,
1047 void *usr_handle,
1048 unsigned int importance,
1049 tipc_msg_err_event error_cb,
1050 tipc_named_msg_err_event named_error_cb,
1051 tipc_conn_shutdown_event conn_error_cb,
1052 tipc_msg_event msg_cb,
1053 tipc_named_msg_event named_msg_cb,
1054 tipc_conn_msg_event conn_msg_cb,
1055 tipc_continue_event continue_event_cb,/* May be zero */
1056 u32 *portref)
1057 {
1058 struct user_port *up_ptr;
1059 struct port *p_ptr;
1060 u32 ref;
1061
1062 up_ptr = (struct user_port *)kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
1063 if (up_ptr == NULL) {
1064 return -ENOMEM;
1065 }
1066 ref = tipc_createport_raw(NULL, port_dispatcher, port_wakeup, importance);
1067 p_ptr = tipc_port_lock(ref);
1068 if (!p_ptr) {
1069 kfree(up_ptr);
1070 return -ENOMEM;
1071 }
1072
1073 p_ptr->user_port = up_ptr;
1074 up_ptr->user_ref = user_ref;
1075 up_ptr->usr_handle = usr_handle;
1076 up_ptr->ref = p_ptr->publ.ref;
1077 up_ptr->err_cb = error_cb;
1078 up_ptr->named_err_cb = named_error_cb;
1079 up_ptr->conn_err_cb = conn_error_cb;
1080 up_ptr->msg_cb = msg_cb;
1081 up_ptr->named_msg_cb = named_msg_cb;
1082 up_ptr->conn_msg_cb = conn_msg_cb;
1083 up_ptr->continue_event_cb = continue_event_cb;
1084 INIT_LIST_HEAD(&up_ptr->uport_list);
1085 tipc_reg_add_port(up_ptr);
1086 *portref = p_ptr->publ.ref;
1087 dbg(" tipc_createport: %x with ref %u\n", p_ptr, p_ptr->publ.ref);
1088 tipc_port_unlock(p_ptr);
1089 return TIPC_OK;
1090 }
1091
1092 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
1093 {
1094 id->ref = ref;
1095 id->node = tipc_own_addr;
1096 return TIPC_OK;
1097 }
1098
1099 int tipc_portimportance(u32 ref, unsigned int *importance)
1100 {
1101 struct port *p_ptr;
1102
1103 p_ptr = tipc_port_lock(ref);
1104 if (!p_ptr)
1105 return -EINVAL;
1106 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1107 spin_unlock_bh(p_ptr->publ.lock);
1108 return TIPC_OK;
1109 }
1110
1111 int tipc_set_portimportance(u32 ref, unsigned int imp)
1112 {
1113 struct port *p_ptr;
1114
1115 if (imp > TIPC_CRITICAL_IMPORTANCE)
1116 return -EINVAL;
1117
1118 p_ptr = tipc_port_lock(ref);
1119 if (!p_ptr)
1120 return -EINVAL;
1121 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1122 spin_unlock_bh(p_ptr->publ.lock);
1123 return TIPC_OK;
1124 }
1125
1126
1127 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1128 {
1129 struct port *p_ptr;
1130 struct publication *publ;
1131 u32 key;
1132 int res = -EINVAL;
1133
1134 p_ptr = tipc_port_lock(ref);
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)
1139 return -EINVAL;
1140 if (p_ptr->publ.connected)
1141 goto exit;
1142 if (seq->lower > seq->upper)
1143 goto exit;
1144 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1145 goto exit;
1146 key = ref + p_ptr->pub_count + 1;
1147 if (key == ref) {
1148 res = -EADDRINUSE;
1149 goto exit;
1150 }
1151 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1152 scope, p_ptr->publ.ref, key);
1153 if (publ) {
1154 list_add(&publ->pport_list, &p_ptr->publications);
1155 p_ptr->pub_count++;
1156 p_ptr->publ.published = 1;
1157 res = TIPC_OK;
1158 }
1159 exit:
1160 tipc_port_unlock(p_ptr);
1161 return res;
1162 }
1163
1164 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1165 {
1166 struct port *p_ptr;
1167 struct publication *publ;
1168 struct publication *tpubl;
1169 int res = -EINVAL;
1170
1171 p_ptr = tipc_port_lock(ref);
1172 if (!p_ptr)
1173 return -EINVAL;
1174 if (!p_ptr->publ.published)
1175 goto exit;
1176 if (!seq) {
1177 list_for_each_entry_safe(publ, tpubl,
1178 &p_ptr->publications, pport_list) {
1179 tipc_nametbl_withdraw(publ->type, publ->lower,
1180 publ->ref, publ->key);
1181 }
1182 res = TIPC_OK;
1183 } else {
1184 list_for_each_entry_safe(publ, tpubl,
1185 &p_ptr->publications, pport_list) {
1186 if (publ->scope != scope)
1187 continue;
1188 if (publ->type != seq->type)
1189 continue;
1190 if (publ->lower != seq->lower)
1191 continue;
1192 if (publ->upper != seq->upper)
1193 break;
1194 tipc_nametbl_withdraw(publ->type, publ->lower,
1195 publ->ref, publ->key);
1196 res = TIPC_OK;
1197 break;
1198 }
1199 }
1200 if (list_empty(&p_ptr->publications))
1201 p_ptr->publ.published = 0;
1202 exit:
1203 tipc_port_unlock(p_ptr);
1204 return res;
1205 }
1206
1207 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1208 {
1209 struct port *p_ptr;
1210 struct tipc_msg *msg;
1211 int res = -EINVAL;
1212
1213 p_ptr = tipc_port_lock(ref);
1214 if (!p_ptr)
1215 return -EINVAL;
1216 if (p_ptr->publ.published || p_ptr->publ.connected)
1217 goto exit;
1218 if (!peer->ref)
1219 goto exit;
1220
1221 msg = &p_ptr->publ.phdr;
1222 msg_set_destnode(msg, peer->node);
1223 msg_set_destport(msg, peer->ref);
1224 msg_set_orignode(msg, tipc_own_addr);
1225 msg_set_origport(msg, p_ptr->publ.ref);
1226 msg_set_transp_seqno(msg, 42);
1227 msg_set_type(msg, TIPC_CONN_MSG);
1228 if (!may_route(peer->node))
1229 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1230 else
1231 msg_set_hdr_sz(msg, LONG_H_SIZE);
1232
1233 p_ptr->probing_interval = PROBING_INTERVAL;
1234 p_ptr->probing_state = CONFIRMED;
1235 p_ptr->publ.connected = 1;
1236 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1237
1238 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1239 (void *)(unsigned long)ref,
1240 (net_ev_handler)port_handle_node_down);
1241 res = TIPC_OK;
1242 exit:
1243 tipc_port_unlock(p_ptr);
1244 p_ptr->max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1245 return res;
1246 }
1247
1248 /*
1249 * tipc_disconnect(): Disconnect port form peer.
1250 * This is a node local operation.
1251 */
1252
1253 int tipc_disconnect(u32 ref)
1254 {
1255 struct port *p_ptr;
1256 int res = -ENOTCONN;
1257
1258 p_ptr = tipc_port_lock(ref);
1259 if (!p_ptr)
1260 return -EINVAL;
1261 if (p_ptr->publ.connected) {
1262 p_ptr->publ.connected = 0;
1263 /* let timer expire on it's own to avoid deadlock! */
1264 tipc_nodesub_unsubscribe(&p_ptr->subscription);
1265 res = TIPC_OK;
1266 }
1267 tipc_port_unlock(p_ptr);
1268 return res;
1269 }
1270
1271 /*
1272 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1273 */
1274 int tipc_shutdown(u32 ref)
1275 {
1276 struct port *p_ptr;
1277 struct sk_buff *buf = NULL;
1278
1279 p_ptr = tipc_port_lock(ref);
1280 if (!p_ptr)
1281 return -EINVAL;
1282
1283 if (p_ptr->publ.connected) {
1284 u32 imp = msg_importance(&p_ptr->publ.phdr);
1285 if (imp < TIPC_CRITICAL_IMPORTANCE)
1286 imp++;
1287 buf = port_build_proto_msg(port_peerport(p_ptr),
1288 port_peernode(p_ptr),
1289 ref,
1290 tipc_own_addr,
1291 imp,
1292 TIPC_CONN_MSG,
1293 TIPC_CONN_SHUTDOWN,
1294 port_out_seqno(p_ptr),
1295 0);
1296 }
1297 tipc_port_unlock(p_ptr);
1298 tipc_net_route_msg(buf);
1299 return tipc_disconnect(ref);
1300 }
1301
1302 int tipc_isconnected(u32 ref, int *isconnected)
1303 {
1304 struct port *p_ptr;
1305
1306 p_ptr = tipc_port_lock(ref);
1307 if (!p_ptr)
1308 return -EINVAL;
1309 *isconnected = p_ptr->publ.connected;
1310 tipc_port_unlock(p_ptr);
1311 return TIPC_OK;
1312 }
1313
1314 int tipc_peer(u32 ref, struct tipc_portid *peer)
1315 {
1316 struct port *p_ptr;
1317 int res;
1318
1319 p_ptr = tipc_port_lock(ref);
1320 if (!p_ptr)
1321 return -EINVAL;
1322 if (p_ptr->publ.connected) {
1323 peer->ref = port_peerport(p_ptr);
1324 peer->node = port_peernode(p_ptr);
1325 res = TIPC_OK;
1326 } else
1327 res = -ENOTCONN;
1328 tipc_port_unlock(p_ptr);
1329 return res;
1330 }
1331
1332 int tipc_ref_valid(u32 ref)
1333 {
1334 /* Works irrespective of type */
1335 return !!tipc_ref_deref(ref);
1336 }
1337
1338
1339 /*
1340 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1341 * message for this node.
1342 */
1343
1344 int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1345 struct iovec const *msg_sect)
1346 {
1347 struct sk_buff *buf;
1348 int res;
1349
1350 res = msg_build(&sender->publ.phdr, msg_sect, num_sect,
1351 MAX_MSG_SIZE, !sender->user_port, &buf);
1352 if (likely(buf))
1353 tipc_port_recv_msg(buf);
1354 return res;
1355 }
1356
1357 /**
1358 * tipc_send - send message sections on connection
1359 */
1360
1361 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1362 {
1363 struct port *p_ptr;
1364 u32 destnode;
1365 int res;
1366
1367 p_ptr = tipc_port_deref(ref);
1368 if (!p_ptr || !p_ptr->publ.connected)
1369 return -EINVAL;
1370
1371 p_ptr->publ.congested = 1;
1372 if (!tipc_port_congested(p_ptr)) {
1373 destnode = port_peernode(p_ptr);
1374 if (likely(destnode != tipc_own_addr))
1375 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1376 destnode);
1377 else
1378 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1379
1380 if (likely(res != -ELINKCONG)) {
1381 port_incr_out_seqno(p_ptr);
1382 p_ptr->publ.congested = 0;
1383 p_ptr->sent++;
1384 return res;
1385 }
1386 }
1387 if (port_unreliable(p_ptr)) {
1388 p_ptr->publ.congested = 0;
1389 /* Just calculate msg length and return */
1390 return msg_calc_data_size(msg_sect, num_sect);
1391 }
1392 return -ELINKCONG;
1393 }
1394
1395 /**
1396 * tipc_send_buf - send message buffer on connection
1397 */
1398
1399 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1400 {
1401 struct port *p_ptr;
1402 struct tipc_msg *msg;
1403 u32 destnode;
1404 u32 hsz;
1405 u32 sz;
1406 u32 res;
1407
1408 p_ptr = tipc_port_deref(ref);
1409 if (!p_ptr || !p_ptr->publ.connected)
1410 return -EINVAL;
1411
1412 msg = &p_ptr->publ.phdr;
1413 hsz = msg_hdr_sz(msg);
1414 sz = hsz + dsz;
1415 msg_set_size(msg, sz);
1416 if (skb_cow(buf, hsz))
1417 return -ENOMEM;
1418
1419 skb_push(buf, hsz);
1420 memcpy(buf->data, (unchar *)msg, hsz);
1421 destnode = msg_destnode(msg);
1422 p_ptr->publ.congested = 1;
1423 if (!tipc_port_congested(p_ptr)) {
1424 if (likely(destnode != tipc_own_addr))
1425 res = tipc_send_buf_fast(buf, destnode);
1426 else {
1427 tipc_port_recv_msg(buf);
1428 res = sz;
1429 }
1430 if (likely(res != -ELINKCONG)) {
1431 port_incr_out_seqno(p_ptr);
1432 p_ptr->sent++;
1433 p_ptr->publ.congested = 0;
1434 return res;
1435 }
1436 }
1437 if (port_unreliable(p_ptr)) {
1438 p_ptr->publ.congested = 0;
1439 return dsz;
1440 }
1441 return -ELINKCONG;
1442 }
1443
1444 /**
1445 * tipc_forward2name - forward message sections to port name
1446 */
1447
1448 int tipc_forward2name(u32 ref,
1449 struct tipc_name const *name,
1450 u32 domain,
1451 u32 num_sect,
1452 struct iovec const *msg_sect,
1453 struct tipc_portid const *orig,
1454 unsigned int importance)
1455 {
1456 struct port *p_ptr;
1457 struct tipc_msg *msg;
1458 u32 destnode = domain;
1459 u32 destport = 0;
1460 int res;
1461
1462 p_ptr = tipc_port_deref(ref);
1463 if (!p_ptr || p_ptr->publ.connected)
1464 return -EINVAL;
1465
1466 msg = &p_ptr->publ.phdr;
1467 msg_set_type(msg, TIPC_NAMED_MSG);
1468 msg_set_orignode(msg, orig->node);
1469 msg_set_origport(msg, orig->ref);
1470 msg_set_hdr_sz(msg, LONG_H_SIZE);
1471 msg_set_nametype(msg, name->type);
1472 msg_set_nameinst(msg, name->instance);
1473 msg_set_lookup_scope(msg, addr_scope(domain));
1474 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1475 msg_set_importance(msg,importance);
1476 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1477 msg_set_destnode(msg, destnode);
1478 msg_set_destport(msg, destport);
1479
1480 if (likely(destport || destnode)) {
1481 p_ptr->sent++;
1482 if (likely(destnode == tipc_own_addr))
1483 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1484 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1485 destnode);
1486 if (likely(res != -ELINKCONG))
1487 return res;
1488 if (port_unreliable(p_ptr)) {
1489 /* Just calculate msg length and return */
1490 return msg_calc_data_size(msg_sect, num_sect);
1491 }
1492 return -ELINKCONG;
1493 }
1494 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1495 TIPC_ERR_NO_NAME);
1496 }
1497
1498 /**
1499 * tipc_send2name - send message sections to port name
1500 */
1501
1502 int tipc_send2name(u32 ref,
1503 struct tipc_name const *name,
1504 unsigned int domain,
1505 unsigned int num_sect,
1506 struct iovec const *msg_sect)
1507 {
1508 struct tipc_portid orig;
1509
1510 orig.ref = ref;
1511 orig.node = tipc_own_addr;
1512 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1513 TIPC_PORT_IMPORTANCE);
1514 }
1515
1516 /**
1517 * tipc_forward_buf2name - forward message buffer to port name
1518 */
1519
1520 int tipc_forward_buf2name(u32 ref,
1521 struct tipc_name const *name,
1522 u32 domain,
1523 struct sk_buff *buf,
1524 unsigned int dsz,
1525 struct tipc_portid const *orig,
1526 unsigned int importance)
1527 {
1528 struct port *p_ptr;
1529 struct tipc_msg *msg;
1530 u32 destnode = domain;
1531 u32 destport = 0;
1532 int res;
1533
1534 p_ptr = (struct port *)tipc_ref_deref(ref);
1535 if (!p_ptr || p_ptr->publ.connected)
1536 return -EINVAL;
1537
1538 msg = &p_ptr->publ.phdr;
1539 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1540 msg_set_importance(msg, importance);
1541 msg_set_type(msg, TIPC_NAMED_MSG);
1542 msg_set_orignode(msg, orig->node);
1543 msg_set_origport(msg, orig->ref);
1544 msg_set_nametype(msg, name->type);
1545 msg_set_nameinst(msg, name->instance);
1546 msg_set_lookup_scope(msg, addr_scope(domain));
1547 msg_set_hdr_sz(msg, LONG_H_SIZE);
1548 msg_set_size(msg, LONG_H_SIZE + dsz);
1549 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1550 msg_set_destnode(msg, destnode);
1551 msg_set_destport(msg, destport);
1552 msg_dbg(msg, "forw2name ==> ");
1553 if (skb_cow(buf, LONG_H_SIZE))
1554 return -ENOMEM;
1555 skb_push(buf, LONG_H_SIZE);
1556 memcpy(buf->data, (unchar *)msg, LONG_H_SIZE);
1557 msg_dbg(buf_msg(buf),"PREP:");
1558 if (likely(destport || destnode)) {
1559 p_ptr->sent++;
1560 if (destnode == tipc_own_addr)
1561 return tipc_port_recv_msg(buf);
1562 res = tipc_send_buf_fast(buf, destnode);
1563 if (likely(res != -ELINKCONG))
1564 return res;
1565 if (port_unreliable(p_ptr))
1566 return dsz;
1567 return -ELINKCONG;
1568 }
1569 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1570 }
1571
1572 /**
1573 * tipc_send_buf2name - send message buffer to port name
1574 */
1575
1576 int tipc_send_buf2name(u32 ref,
1577 struct tipc_name const *dest,
1578 u32 domain,
1579 struct sk_buff *buf,
1580 unsigned int dsz)
1581 {
1582 struct tipc_portid orig;
1583
1584 orig.ref = ref;
1585 orig.node = tipc_own_addr;
1586 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1587 TIPC_PORT_IMPORTANCE);
1588 }
1589
1590 /**
1591 * tipc_forward2port - forward message sections to port identity
1592 */
1593
1594 int tipc_forward2port(u32 ref,
1595 struct tipc_portid const *dest,
1596 unsigned int num_sect,
1597 struct iovec const *msg_sect,
1598 struct tipc_portid const *orig,
1599 unsigned int importance)
1600 {
1601 struct port *p_ptr;
1602 struct tipc_msg *msg;
1603 int res;
1604
1605 p_ptr = tipc_port_deref(ref);
1606 if (!p_ptr || p_ptr->publ.connected)
1607 return -EINVAL;
1608
1609 msg = &p_ptr->publ.phdr;
1610 msg_set_type(msg, TIPC_DIRECT_MSG);
1611 msg_set_orignode(msg, orig->node);
1612 msg_set_origport(msg, orig->ref);
1613 msg_set_destnode(msg, dest->node);
1614 msg_set_destport(msg, dest->ref);
1615 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1616 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1617 msg_set_importance(msg, importance);
1618 p_ptr->sent++;
1619 if (dest->node == tipc_own_addr)
1620 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1621 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1622 if (likely(res != -ELINKCONG))
1623 return res;
1624 if (port_unreliable(p_ptr)) {
1625 /* Just calculate msg length and return */
1626 return msg_calc_data_size(msg_sect, num_sect);
1627 }
1628 return -ELINKCONG;
1629 }
1630
1631 /**
1632 * tipc_send2port - send message sections to port identity
1633 */
1634
1635 int tipc_send2port(u32 ref,
1636 struct tipc_portid const *dest,
1637 unsigned int num_sect,
1638 struct iovec const *msg_sect)
1639 {
1640 struct tipc_portid orig;
1641
1642 orig.ref = ref;
1643 orig.node = tipc_own_addr;
1644 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1645 TIPC_PORT_IMPORTANCE);
1646 }
1647
1648 /**
1649 * tipc_forward_buf2port - forward message buffer to port identity
1650 */
1651 int tipc_forward_buf2port(u32 ref,
1652 struct tipc_portid const *dest,
1653 struct sk_buff *buf,
1654 unsigned int dsz,
1655 struct tipc_portid const *orig,
1656 unsigned int importance)
1657 {
1658 struct port *p_ptr;
1659 struct tipc_msg *msg;
1660 int res;
1661
1662 p_ptr = (struct port *)tipc_ref_deref(ref);
1663 if (!p_ptr || p_ptr->publ.connected)
1664 return -EINVAL;
1665
1666 msg = &p_ptr->publ.phdr;
1667 msg_set_type(msg, TIPC_DIRECT_MSG);
1668 msg_set_orignode(msg, orig->node);
1669 msg_set_origport(msg, orig->ref);
1670 msg_set_destnode(msg, dest->node);
1671 msg_set_destport(msg, dest->ref);
1672 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1673 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1674 msg_set_importance(msg, importance);
1675 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1676 if (skb_cow(buf, DIR_MSG_H_SIZE))
1677 return -ENOMEM;
1678
1679 skb_push(buf, DIR_MSG_H_SIZE);
1680 memcpy(buf->data, (unchar *)msg, DIR_MSG_H_SIZE);
1681 msg_dbg(msg, "buf2port: ");
1682 p_ptr->sent++;
1683 if (dest->node == tipc_own_addr)
1684 return tipc_port_recv_msg(buf);
1685 res = tipc_send_buf_fast(buf, dest->node);
1686 if (likely(res != -ELINKCONG))
1687 return res;
1688 if (port_unreliable(p_ptr))
1689 return dsz;
1690 return -ELINKCONG;
1691 }
1692
1693 /**
1694 * tipc_send_buf2port - send message buffer to port identity
1695 */
1696
1697 int tipc_send_buf2port(u32 ref,
1698 struct tipc_portid const *dest,
1699 struct sk_buff *buf,
1700 unsigned int dsz)
1701 {
1702 struct tipc_portid orig;
1703
1704 orig.ref = ref;
1705 orig.node = tipc_own_addr;
1706 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1707 TIPC_PORT_IMPORTANCE);
1708 }
1709
Linux kernel - Deliverables
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