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[TIPC] License header update
[deliverable/linux.git] / net / tipc / port.c
1 /*
2 * net/tipc/port.c: TIPC port code
3 *
4 * Copyright (c) 2003-2005, Ericsson Research Canada
5 * Copyright (c) 2004-2005, Wind River Systems
6 * Copyright (c) 2005-2006, Ericsson AB
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the names of the copyright holders nor the names of its
18 * contributors may be used to endorse or promote products derived from
19 * this software without specific prior written permission.
20 *
21 * Alternatively, this software may be distributed under the terms of the
22 * GNU General Public License ("GPL") version 2 as published by the Free
23 * Software Foundation.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
29 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include "core.h"
39 #include "config.h"
40 #include "dbg.h"
41 #include "port.h"
42 #include "addr.h"
43 #include "link.h"
44 #include "node.h"
45 #include "port.h"
46 #include "name_table.h"
47 #include "user_reg.h"
48 #include "msg.h"
49 #include "bcast.h"
50
51 /* Connection management: */
52 #define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
53 #define CONFIRMED 0
54 #define PROBING 1
55
56 #define MAX_REJECT_SIZE 1024
57
58 static struct sk_buff *msg_queue_head = 0;
59 static struct sk_buff *msg_queue_tail = 0;
60
61 spinlock_t port_list_lock = SPIN_LOCK_UNLOCKED;
62 static spinlock_t queue_lock = SPIN_LOCK_UNLOCKED;
63
64 LIST_HEAD(ports);
65 static void port_handle_node_down(unsigned long ref);
66 static struct sk_buff* port_build_self_abort_msg(struct port *,u32 err);
67 static struct sk_buff* port_build_peer_abort_msg(struct port *,u32 err);
68 static void port_timeout(unsigned long ref);
69
70
71 static inline u32 port_peernode(struct port *p_ptr)
72 {
73 return msg_destnode(&p_ptr->publ.phdr);
74 }
75
76 static inline u32 port_peerport(struct port *p_ptr)
77 {
78 return msg_destport(&p_ptr->publ.phdr);
79 }
80
81 static inline u32 port_out_seqno(struct port *p_ptr)
82 {
83 return msg_transp_seqno(&p_ptr->publ.phdr);
84 }
85
86 static inline void port_set_out_seqno(struct port *p_ptr, u32 seqno)
87 {
88 msg_set_transp_seqno(&p_ptr->publ.phdr,seqno);
89 }
90
91 static inline void port_incr_out_seqno(struct port *p_ptr)
92 {
93 struct tipc_msg *m = &p_ptr->publ.phdr;
94
95 if (likely(!msg_routed(m)))
96 return;
97 msg_set_transp_seqno(m, (msg_transp_seqno(m) + 1));
98 }
99
100 /**
101 * tipc_multicast - send a multicast message to local and remote destinations
102 */
103
104 int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, u32 domain,
105 u32 num_sect, struct iovec const *msg_sect)
106 {
107 struct tipc_msg *hdr;
108 struct sk_buff *buf;
109 struct sk_buff *ibuf = NULL;
110 struct port_list dports = {0, NULL, };
111 struct port *oport = port_deref(ref);
112 int ext_targets;
113 int res;
114
115 if (unlikely(!oport))
116 return -EINVAL;
117
118 /* Create multicast message */
119
120 hdr = &oport->publ.phdr;
121 msg_set_type(hdr, TIPC_MCAST_MSG);
122 msg_set_nametype(hdr, seq->type);
123 msg_set_namelower(hdr, seq->lower);
124 msg_set_nameupper(hdr, seq->upper);
125 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
126 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
127 !oport->user_port, &buf);
128 if (unlikely(!buf))
129 return res;
130
131 /* Figure out where to send multicast message */
132
133 ext_targets = nametbl_mc_translate(seq->type, seq->lower, seq->upper,
134 TIPC_NODE_SCOPE, &dports);
135
136 /* Send message to destinations (duplicate it only if necessary) */
137
138 if (ext_targets) {
139 if (dports.count != 0) {
140 ibuf = skb_copy(buf, GFP_ATOMIC);
141 if (ibuf == NULL) {
142 port_list_free(&dports);
143 buf_discard(buf);
144 return -ENOMEM;
145 }
146 }
147 res = bclink_send_msg(buf);
148 if ((res < 0) && (dports.count != 0)) {
149 buf_discard(ibuf);
150 }
151 } else {
152 ibuf = buf;
153 }
154
155 if (res >= 0) {
156 if (ibuf)
157 port_recv_mcast(ibuf, &dports);
158 } else {
159 port_list_free(&dports);
160 }
161 return res;
162 }
163
164 /**
165 * port_recv_mcast - deliver multicast message to all destination ports
166 *
167 * If there is no port list, perform a lookup to create one
168 */
169
170 void port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
171 {
172 struct tipc_msg* msg;
173 struct port_list dports = {0, NULL, };
174 struct port_list *item = dp;
175 int cnt = 0;
176
177 assert(buf);
178 msg = buf_msg(buf);
179
180 /* Create destination port list, if one wasn't supplied */
181
182 if (dp == NULL) {
183 nametbl_mc_translate(msg_nametype(msg),
184 msg_namelower(msg),
185 msg_nameupper(msg),
186 TIPC_CLUSTER_SCOPE,
187 &dports);
188 item = dp = &dports;
189 }
190
191 /* Deliver a copy of message to each destination port */
192
193 if (dp->count != 0) {
194 if (dp->count == 1) {
195 msg_set_destport(msg, dp->ports[0]);
196 port_recv_msg(buf);
197 port_list_free(dp);
198 return;
199 }
200 for (; cnt < dp->count; cnt++) {
201 int index = cnt % PLSIZE;
202 struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
203
204 if (b == NULL) {
205 warn("Buffer allocation failure\n");
206 msg_dbg(msg, "LOST:");
207 goto exit;
208 }
209 if ((index == 0) && (cnt != 0)) {
210 item = item->next;
211 }
212 msg_set_destport(buf_msg(b),item->ports[index]);
213 port_recv_msg(b);
214 }
215 }
216 exit:
217 buf_discard(buf);
218 port_list_free(dp);
219 }
220
221 /**
222 * tipc_createport_raw - create a native TIPC port
223 *
224 * Returns local port reference
225 */
226
227 u32 tipc_createport_raw(void *usr_handle,
228 u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
229 void (*wakeup)(struct tipc_port *),
230 const u32 importance)
231 {
232 struct port *p_ptr;
233 struct tipc_msg *msg;
234 u32 ref;
235
236 p_ptr = kmalloc(sizeof(*p_ptr), GFP_ATOMIC);
237 if (p_ptr == NULL) {
238 warn("Memory squeeze; failed to create port\n");
239 return 0;
240 }
241 memset(p_ptr, 0, sizeof(*p_ptr));
242 ref = ref_acquire(p_ptr, &p_ptr->publ.lock);
243 if (!ref) {
244 warn("Reference Table Exhausted\n");
245 kfree(p_ptr);
246 return 0;
247 }
248
249 port_lock(ref);
250 p_ptr->publ.ref = ref;
251 msg = &p_ptr->publ.phdr;
252 msg_init(msg, DATA_LOW, TIPC_NAMED_MSG, TIPC_OK, LONG_H_SIZE, 0);
253 msg_set_orignode(msg, tipc_own_addr);
254 msg_set_prevnode(msg, tipc_own_addr);
255 msg_set_origport(msg, ref);
256 msg_set_importance(msg,importance);
257 p_ptr->last_in_seqno = 41;
258 p_ptr->sent = 1;
259 p_ptr->publ.usr_handle = usr_handle;
260 INIT_LIST_HEAD(&p_ptr->wait_list);
261 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
262 p_ptr->congested_link = 0;
263 p_ptr->max_pkt = MAX_PKT_DEFAULT;
264 p_ptr->dispatcher = dispatcher;
265 p_ptr->wakeup = wakeup;
266 p_ptr->user_port = 0;
267 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
268 spin_lock_bh(&port_list_lock);
269 INIT_LIST_HEAD(&p_ptr->publications);
270 INIT_LIST_HEAD(&p_ptr->port_list);
271 list_add_tail(&p_ptr->port_list, &ports);
272 spin_unlock_bh(&port_list_lock);
273 port_unlock(p_ptr);
274 return ref;
275 }
276
277 int tipc_deleteport(u32 ref)
278 {
279 struct port *p_ptr;
280 struct sk_buff *buf = 0;
281
282 tipc_withdraw(ref, 0, 0);
283 p_ptr = port_lock(ref);
284 if (!p_ptr)
285 return -EINVAL;
286
287 ref_discard(ref);
288 port_unlock(p_ptr);
289
290 k_cancel_timer(&p_ptr->timer);
291 if (p_ptr->publ.connected) {
292 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
293 nodesub_unsubscribe(&p_ptr->subscription);
294 }
295 if (p_ptr->user_port) {
296 reg_remove_port(p_ptr->user_port);
297 kfree(p_ptr->user_port);
298 }
299
300 spin_lock_bh(&port_list_lock);
301 list_del(&p_ptr->port_list);
302 list_del(&p_ptr->wait_list);
303 spin_unlock_bh(&port_list_lock);
304 k_term_timer(&p_ptr->timer);
305 kfree(p_ptr);
306 dbg("Deleted port %u\n", ref);
307 net_route_msg(buf);
308 return TIPC_OK;
309 }
310
311 /**
312 * tipc_get_port() - return port associated with 'ref'
313 *
314 * Note: Port is not locked.
315 */
316
317 struct tipc_port *tipc_get_port(const u32 ref)
318 {
319 return (struct tipc_port *)ref_deref(ref);
320 }
321
322 /**
323 * tipc_get_handle - return user handle associated to port 'ref'
324 */
325
326 void *tipc_get_handle(const u32 ref)
327 {
328 struct port *p_ptr;
329 void * handle;
330
331 p_ptr = port_lock(ref);
332 if (!p_ptr)
333 return 0;
334 handle = p_ptr->publ.usr_handle;
335 port_unlock(p_ptr);
336 return handle;
337 }
338
339 static inline int port_unreliable(struct port *p_ptr)
340 {
341 return msg_src_droppable(&p_ptr->publ.phdr);
342 }
343
344 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
345 {
346 struct port *p_ptr;
347
348 p_ptr = port_lock(ref);
349 if (!p_ptr)
350 return -EINVAL;
351 *isunreliable = port_unreliable(p_ptr);
352 spin_unlock_bh(p_ptr->publ.lock);
353 return TIPC_OK;
354 }
355
356 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
357 {
358 struct port *p_ptr;
359
360 p_ptr = port_lock(ref);
361 if (!p_ptr)
362 return -EINVAL;
363 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
364 port_unlock(p_ptr);
365 return TIPC_OK;
366 }
367
368 static inline int port_unreturnable(struct port *p_ptr)
369 {
370 return msg_dest_droppable(&p_ptr->publ.phdr);
371 }
372
373 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
374 {
375 struct port *p_ptr;
376
377 p_ptr = port_lock(ref);
378 if (!p_ptr)
379 return -EINVAL;
380 *isunrejectable = port_unreturnable(p_ptr);
381 spin_unlock_bh(p_ptr->publ.lock);
382 return TIPC_OK;
383 }
384
385 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
386 {
387 struct port *p_ptr;
388
389 p_ptr = port_lock(ref);
390 if (!p_ptr)
391 return -EINVAL;
392 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
393 port_unlock(p_ptr);
394 return TIPC_OK;
395 }
396
397 /*
398 * port_build_proto_msg(): build a port level protocol
399 * or a connection abortion message. Called with
400 * tipc_port lock on.
401 */
402 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
403 u32 origport, u32 orignode,
404 u32 usr, u32 type, u32 err,
405 u32 seqno, u32 ack)
406 {
407 struct sk_buff *buf;
408 struct tipc_msg *msg;
409
410 buf = buf_acquire(LONG_H_SIZE);
411 if (buf) {
412 msg = buf_msg(buf);
413 msg_init(msg, usr, type, err, LONG_H_SIZE, destnode);
414 msg_set_destport(msg, destport);
415 msg_set_origport(msg, origport);
416 msg_set_destnode(msg, destnode);
417 msg_set_orignode(msg, orignode);
418 msg_set_transp_seqno(msg, seqno);
419 msg_set_msgcnt(msg, ack);
420 msg_dbg(msg, "PORT>SEND>:");
421 }
422 return buf;
423 }
424
425 int tipc_set_msg_option(struct tipc_port *tp_ptr, const char *opt, const u32 sz)
426 {
427 msg_expand(&tp_ptr->phdr, msg_destnode(&tp_ptr->phdr));
428 msg_set_options(&tp_ptr->phdr, opt, sz);
429 return TIPC_OK;
430 }
431
432 int tipc_reject_msg(struct sk_buff *buf, u32 err)
433 {
434 struct tipc_msg *msg = buf_msg(buf);
435 struct sk_buff *rbuf;
436 struct tipc_msg *rmsg;
437 int hdr_sz;
438 u32 imp = msg_importance(msg);
439 u32 data_sz = msg_data_sz(msg);
440
441 if (data_sz > MAX_REJECT_SIZE)
442 data_sz = MAX_REJECT_SIZE;
443 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
444 imp++;
445 msg_dbg(msg, "port->rej: ");
446
447 /* discard rejected message if it shouldn't be returned to sender */
448 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
449 buf_discard(buf);
450 return data_sz;
451 }
452
453 /* construct rejected message */
454 if (msg_mcast(msg))
455 hdr_sz = MCAST_H_SIZE;
456 else
457 hdr_sz = LONG_H_SIZE;
458 rbuf = buf_acquire(data_sz + hdr_sz);
459 if (rbuf == NULL) {
460 buf_discard(buf);
461 return data_sz;
462 }
463 rmsg = buf_msg(rbuf);
464 msg_init(rmsg, imp, msg_type(msg), err, hdr_sz, msg_orignode(msg));
465 msg_set_destport(rmsg, msg_origport(msg));
466 msg_set_prevnode(rmsg, tipc_own_addr);
467 msg_set_origport(rmsg, msg_destport(msg));
468 if (msg_short(msg))
469 msg_set_orignode(rmsg, tipc_own_addr);
470 else
471 msg_set_orignode(rmsg, msg_destnode(msg));
472 msg_set_size(rmsg, data_sz + hdr_sz);
473 msg_set_nametype(rmsg, msg_nametype(msg));
474 msg_set_nameinst(rmsg, msg_nameinst(msg));
475 memcpy(rbuf->data + hdr_sz, msg_data(msg), data_sz);
476
477 /* send self-abort message when rejecting on a connected port */
478 if (msg_connected(msg)) {
479 struct sk_buff *abuf = 0;
480 struct port *p_ptr = port_lock(msg_destport(msg));
481
482 if (p_ptr) {
483 if (p_ptr->publ.connected)
484 abuf = port_build_self_abort_msg(p_ptr, err);
485 port_unlock(p_ptr);
486 }
487 net_route_msg(abuf);
488 }
489
490 /* send rejected message */
491 buf_discard(buf);
492 net_route_msg(rbuf);
493 return data_sz;
494 }
495
496 int port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
497 struct iovec const *msg_sect, u32 num_sect,
498 int err)
499 {
500 struct sk_buff *buf;
501 int res;
502
503 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
504 !p_ptr->user_port, &buf);
505 if (!buf)
506 return res;
507
508 return tipc_reject_msg(buf, err);
509 }
510
511 static void port_timeout(unsigned long ref)
512 {
513 struct port *p_ptr = port_lock(ref);
514 struct sk_buff *buf = 0;
515
516 if (!p_ptr || !p_ptr->publ.connected)
517 return;
518
519 /* Last probe answered ? */
520 if (p_ptr->probing_state == PROBING) {
521 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
522 } else {
523 buf = port_build_proto_msg(port_peerport(p_ptr),
524 port_peernode(p_ptr),
525 p_ptr->publ.ref,
526 tipc_own_addr,
527 CONN_MANAGER,
528 CONN_PROBE,
529 TIPC_OK,
530 port_out_seqno(p_ptr),
531 0);
532 port_incr_out_seqno(p_ptr);
533 p_ptr->probing_state = PROBING;
534 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
535 }
536 port_unlock(p_ptr);
537 net_route_msg(buf);
538 }
539
540
541 static void port_handle_node_down(unsigned long ref)
542 {
543 struct port *p_ptr = port_lock(ref);
544 struct sk_buff* buf = 0;
545
546 if (!p_ptr)
547 return;
548 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
549 port_unlock(p_ptr);
550 net_route_msg(buf);
551 }
552
553
554 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
555 {
556 u32 imp = msg_importance(&p_ptr->publ.phdr);
557
558 if (!p_ptr->publ.connected)
559 return 0;
560 if (imp < TIPC_CRITICAL_IMPORTANCE)
561 imp++;
562 return port_build_proto_msg(p_ptr->publ.ref,
563 tipc_own_addr,
564 port_peerport(p_ptr),
565 port_peernode(p_ptr),
566 imp,
567 TIPC_CONN_MSG,
568 err,
569 p_ptr->last_in_seqno + 1,
570 0);
571 }
572
573
574 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
575 {
576 u32 imp = msg_importance(&p_ptr->publ.phdr);
577
578 if (!p_ptr->publ.connected)
579 return 0;
580 if (imp < TIPC_CRITICAL_IMPORTANCE)
581 imp++;
582 return port_build_proto_msg(port_peerport(p_ptr),
583 port_peernode(p_ptr),
584 p_ptr->publ.ref,
585 tipc_own_addr,
586 imp,
587 TIPC_CONN_MSG,
588 err,
589 port_out_seqno(p_ptr),
590 0);
591 }
592
593 void port_recv_proto_msg(struct sk_buff *buf)
594 {
595 struct tipc_msg *msg = buf_msg(buf);
596 struct port *p_ptr = port_lock(msg_destport(msg));
597 u32 err = TIPC_OK;
598 struct sk_buff *r_buf = 0;
599 struct sk_buff *abort_buf = 0;
600
601 msg_dbg(msg, "PORT<RECV<:");
602
603 if (!p_ptr) {
604 err = TIPC_ERR_NO_PORT;
605 } else if (p_ptr->publ.connected) {
606 if (port_peernode(p_ptr) != msg_orignode(msg))
607 err = TIPC_ERR_NO_PORT;
608 if (port_peerport(p_ptr) != msg_origport(msg))
609 err = TIPC_ERR_NO_PORT;
610 if (!err && msg_routed(msg)) {
611 u32 seqno = msg_transp_seqno(msg);
612 u32 myno = ++p_ptr->last_in_seqno;
613 if (seqno != myno) {
614 err = TIPC_ERR_NO_PORT;
615 abort_buf = port_build_self_abort_msg(p_ptr, err);
616 }
617 }
618 if (msg_type(msg) == CONN_ACK) {
619 int wakeup = port_congested(p_ptr) &&
620 p_ptr->publ.congested &&
621 p_ptr->wakeup;
622 p_ptr->acked += msg_msgcnt(msg);
623 if (port_congested(p_ptr))
624 goto exit;
625 p_ptr->publ.congested = 0;
626 if (!wakeup)
627 goto exit;
628 p_ptr->wakeup(&p_ptr->publ);
629 goto exit;
630 }
631 } else if (p_ptr->publ.published) {
632 err = TIPC_ERR_NO_PORT;
633 }
634 if (err) {
635 r_buf = port_build_proto_msg(msg_origport(msg),
636 msg_orignode(msg),
637 msg_destport(msg),
638 tipc_own_addr,
639 DATA_HIGH,
640 TIPC_CONN_MSG,
641 err,
642 0,
643 0);
644 goto exit;
645 }
646
647 /* All is fine */
648 if (msg_type(msg) == CONN_PROBE) {
649 r_buf = port_build_proto_msg(msg_origport(msg),
650 msg_orignode(msg),
651 msg_destport(msg),
652 tipc_own_addr,
653 CONN_MANAGER,
654 CONN_PROBE_REPLY,
655 TIPC_OK,
656 port_out_seqno(p_ptr),
657 0);
658 }
659 p_ptr->probing_state = CONFIRMED;
660 port_incr_out_seqno(p_ptr);
661 exit:
662 if (p_ptr)
663 port_unlock(p_ptr);
664 net_route_msg(r_buf);
665 net_route_msg(abort_buf);
666 buf_discard(buf);
667 }
668
669 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
670 {
671 struct publication *publ;
672
673 if (full_id)
674 tipc_printf(buf, "<%u.%u.%u:%u>:",
675 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
676 tipc_node(tipc_own_addr), p_ptr->publ.ref);
677 else
678 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
679
680 if (p_ptr->publ.connected) {
681 u32 dport = port_peerport(p_ptr);
682 u32 destnode = port_peernode(p_ptr);
683
684 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
685 tipc_zone(destnode), tipc_cluster(destnode),
686 tipc_node(destnode), dport);
687 if (p_ptr->publ.conn_type != 0)
688 tipc_printf(buf, " via {%u,%u}",
689 p_ptr->publ.conn_type,
690 p_ptr->publ.conn_instance);
691 }
692 else if (p_ptr->publ.published) {
693 tipc_printf(buf, " bound to");
694 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
695 if (publ->lower == publ->upper)
696 tipc_printf(buf, " {%u,%u}", publ->type,
697 publ->lower);
698 else
699 tipc_printf(buf, " {%u,%u,%u}", publ->type,
700 publ->lower, publ->upper);
701 }
702 }
703 tipc_printf(buf, "\n");
704 }
705
706 #define MAX_PORT_QUERY 32768
707
708 struct sk_buff *port_get_ports(void)
709 {
710 struct sk_buff *buf;
711 struct tlv_desc *rep_tlv;
712 struct print_buf pb;
713 struct port *p_ptr;
714 int str_len;
715
716 buf = cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
717 if (!buf)
718 return NULL;
719 rep_tlv = (struct tlv_desc *)buf->data;
720
721 printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
722 spin_lock_bh(&port_list_lock);
723 list_for_each_entry(p_ptr, &ports, port_list) {
724 spin_lock_bh(p_ptr->publ.lock);
725 port_print(p_ptr, &pb, 0);
726 spin_unlock_bh(p_ptr->publ.lock);
727 }
728 spin_unlock_bh(&port_list_lock);
729 str_len = printbuf_validate(&pb);
730
731 skb_put(buf, TLV_SPACE(str_len));
732 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
733
734 return buf;
735 }
736
737 #if 0
738
739 #define MAX_PORT_STATS 2000
740
741 struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
742 {
743 u32 ref;
744 struct port *p_ptr;
745 struct sk_buff *buf;
746 struct tlv_desc *rep_tlv;
747 struct print_buf pb;
748 int str_len;
749
750 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
751 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
752
753 ref = *(u32 *)TLV_DATA(req_tlv_area);
754 ref = ntohl(ref);
755
756 p_ptr = port_lock(ref);
757 if (!p_ptr)
758 return cfg_reply_error_string("port not found");
759
760 buf = cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
761 if (!buf) {
762 port_unlock(p_ptr);
763 return NULL;
764 }
765 rep_tlv = (struct tlv_desc *)buf->data;
766
767 printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
768 port_print(p_ptr, &pb, 1);
769 /* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
770 port_unlock(p_ptr);
771 str_len = printbuf_validate(&pb);
772
773 skb_put(buf, TLV_SPACE(str_len));
774 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
775
776 return buf;
777 }
778
779 #endif
780
781 void port_reinit(void)
782 {
783 struct port *p_ptr;
784 struct tipc_msg *msg;
785
786 spin_lock_bh(&port_list_lock);
787 list_for_each_entry(p_ptr, &ports, port_list) {
788 msg = &p_ptr->publ.phdr;
789 if (msg_orignode(msg) == tipc_own_addr)
790 break;
791 msg_set_orignode(msg, tipc_own_addr);
792 }
793 spin_unlock_bh(&port_list_lock);
794 }
795
796
797 /*
798 * port_dispatcher_sigh(): Signal handler for messages destinated
799 * to the tipc_port interface.
800 */
801
802 static void port_dispatcher_sigh(void *dummy)
803 {
804 struct sk_buff *buf;
805
806 spin_lock_bh(&queue_lock);
807 buf = msg_queue_head;
808 msg_queue_head = 0;
809 spin_unlock_bh(&queue_lock);
810
811 while (buf) {
812 struct port *p_ptr;
813 struct user_port *up_ptr;
814 struct tipc_portid orig;
815 struct tipc_name_seq dseq;
816 void *usr_handle;
817 int connected;
818 int published;
819
820 struct sk_buff *next = buf->next;
821 struct tipc_msg *msg = buf_msg(buf);
822 u32 dref = msg_destport(msg);
823
824 p_ptr = port_lock(dref);
825 if (!p_ptr) {
826 /* Port deleted while msg in queue */
827 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
828 buf = next;
829 continue;
830 }
831 orig.ref = msg_origport(msg);
832 orig.node = msg_orignode(msg);
833 up_ptr = p_ptr->user_port;
834 usr_handle = up_ptr->usr_handle;
835 connected = p_ptr->publ.connected;
836 published = p_ptr->publ.published;
837
838 if (unlikely(msg_errcode(msg)))
839 goto err;
840
841 switch (msg_type(msg)) {
842
843 case TIPC_CONN_MSG:{
844 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
845 u32 peer_port = port_peerport(p_ptr);
846 u32 peer_node = port_peernode(p_ptr);
847
848 spin_unlock_bh(p_ptr->publ.lock);
849 if (unlikely(!connected)) {
850 if (unlikely(published))
851 goto reject;
852 tipc_connect2port(dref,&orig);
853 }
854 if (unlikely(msg_origport(msg) != peer_port))
855 goto reject;
856 if (unlikely(msg_orignode(msg) != peer_node))
857 goto reject;
858 if (unlikely(!cb))
859 goto reject;
860 if (unlikely(++p_ptr->publ.conn_unacked >=
861 TIPC_FLOW_CONTROL_WIN))
862 tipc_acknowledge(dref,
863 p_ptr->publ.conn_unacked);
864 skb_pull(buf, msg_hdr_sz(msg));
865 cb(usr_handle, dref, &buf, msg_data(msg),
866 msg_data_sz(msg));
867 break;
868 }
869 case TIPC_DIRECT_MSG:{
870 tipc_msg_event cb = up_ptr->msg_cb;
871
872 spin_unlock_bh(p_ptr->publ.lock);
873 if (unlikely(connected))
874 goto reject;
875 if (unlikely(!cb))
876 goto reject;
877 skb_pull(buf, msg_hdr_sz(msg));
878 cb(usr_handle, dref, &buf, msg_data(msg),
879 msg_data_sz(msg), msg_importance(msg),
880 &orig);
881 break;
882 }
883 case TIPC_NAMED_MSG:{
884 tipc_named_msg_event cb = up_ptr->named_msg_cb;
885
886 spin_unlock_bh(p_ptr->publ.lock);
887 if (unlikely(connected))
888 goto reject;
889 if (unlikely(!cb))
890 goto reject;
891 if (unlikely(!published))
892 goto reject;
893 dseq.type = msg_nametype(msg);
894 dseq.lower = msg_nameinst(msg);
895 dseq.upper = dseq.lower;
896 skb_pull(buf, msg_hdr_sz(msg));
897 cb(usr_handle, dref, &buf, msg_data(msg),
898 msg_data_sz(msg), msg_importance(msg),
899 &orig, &dseq);
900 break;
901 }
902 }
903 if (buf)
904 buf_discard(buf);
905 buf = next;
906 continue;
907 err:
908 switch (msg_type(msg)) {
909
910 case TIPC_CONN_MSG:{
911 tipc_conn_shutdown_event cb =
912 up_ptr->conn_err_cb;
913 u32 peer_port = port_peerport(p_ptr);
914 u32 peer_node = port_peernode(p_ptr);
915
916 spin_unlock_bh(p_ptr->publ.lock);
917 if (!connected || !cb)
918 break;
919 if (msg_origport(msg) != peer_port)
920 break;
921 if (msg_orignode(msg) != peer_node)
922 break;
923 tipc_disconnect(dref);
924 skb_pull(buf, msg_hdr_sz(msg));
925 cb(usr_handle, dref, &buf, msg_data(msg),
926 msg_data_sz(msg), msg_errcode(msg));
927 break;
928 }
929 case TIPC_DIRECT_MSG:{
930 tipc_msg_err_event cb = up_ptr->err_cb;
931
932 spin_unlock_bh(p_ptr->publ.lock);
933 if (connected || !cb)
934 break;
935 skb_pull(buf, msg_hdr_sz(msg));
936 cb(usr_handle, dref, &buf, msg_data(msg),
937 msg_data_sz(msg), msg_errcode(msg), &orig);
938 break;
939 }
940 case TIPC_NAMED_MSG:{
941 tipc_named_msg_err_event cb =
942 up_ptr->named_err_cb;
943
944 spin_unlock_bh(p_ptr->publ.lock);
945 if (connected || !cb)
946 break;
947 dseq.type = msg_nametype(msg);
948 dseq.lower = msg_nameinst(msg);
949 dseq.upper = dseq.lower;
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 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 = 0;
996 void *uh = 0;
997
998 p_ptr = 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 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 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 = 0;
1021
1022 p_ptr = 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 port_unlock(p_ptr);
1038 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(0, port_dispatcher, port_wakeup, importance);
1067 p_ptr = 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 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 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 = 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 = 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 = 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 = 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 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 = 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 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 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 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 = 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 nodesub_subscribe(&p_ptr->subscription,peer->node, (void *)ref,
1239 (net_ev_handler)port_handle_node_down);
1240 res = TIPC_OK;
1241 exit:
1242 port_unlock(p_ptr);
1243 p_ptr->max_pkt = link_get_max_pkt(peer->node, ref);
1244 return res;
1245 }
1246
1247 /*
1248 * tipc_disconnect(): Disconnect port form peer.
1249 * This is a node local operation.
1250 */
1251
1252 int tipc_disconnect(u32 ref)
1253 {
1254 struct port *p_ptr;
1255 int res = -ENOTCONN;
1256
1257 p_ptr = port_lock(ref);
1258 if (!p_ptr)
1259 return -EINVAL;
1260 if (p_ptr->publ.connected) {
1261 p_ptr->publ.connected = 0;
1262 /* let timer expire on it's own to avoid deadlock! */
1263 nodesub_unsubscribe(&p_ptr->subscription);
1264 res = TIPC_OK;
1265 }
1266 port_unlock(p_ptr);
1267 return res;
1268 }
1269
1270 /*
1271 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1272 */
1273 int tipc_shutdown(u32 ref)
1274 {
1275 struct port *p_ptr;
1276 struct sk_buff *buf = 0;
1277
1278 p_ptr = port_lock(ref);
1279 if (!p_ptr)
1280 return -EINVAL;
1281
1282 if (p_ptr->publ.connected) {
1283 u32 imp = msg_importance(&p_ptr->publ.phdr);
1284 if (imp < TIPC_CRITICAL_IMPORTANCE)
1285 imp++;
1286 buf = port_build_proto_msg(port_peerport(p_ptr),
1287 port_peernode(p_ptr),
1288 ref,
1289 tipc_own_addr,
1290 imp,
1291 TIPC_CONN_MSG,
1292 TIPC_CONN_SHUTDOWN,
1293 port_out_seqno(p_ptr),
1294 0);
1295 }
1296 port_unlock(p_ptr);
1297 net_route_msg(buf);
1298 return tipc_disconnect(ref);
1299 }
1300
1301 int tipc_isconnected(u32 ref, int *isconnected)
1302 {
1303 struct port *p_ptr;
1304
1305 p_ptr = port_lock(ref);
1306 if (!p_ptr)
1307 return -EINVAL;
1308 *isconnected = p_ptr->publ.connected;
1309 port_unlock(p_ptr);
1310 return TIPC_OK;
1311 }
1312
1313 int tipc_peer(u32 ref, struct tipc_portid *peer)
1314 {
1315 struct port *p_ptr;
1316 int res;
1317
1318 p_ptr = port_lock(ref);
1319 if (!p_ptr)
1320 return -EINVAL;
1321 if (p_ptr->publ.connected) {
1322 peer->ref = port_peerport(p_ptr);
1323 peer->node = port_peernode(p_ptr);
1324 res = TIPC_OK;
1325 } else
1326 res = -ENOTCONN;
1327 port_unlock(p_ptr);
1328 return res;
1329 }
1330
1331 int tipc_ref_valid(u32 ref)
1332 {
1333 /* Works irrespective of type */
1334 return !!ref_deref(ref);
1335 }
1336
1337
1338 /*
1339 * port_recv_sections(): Concatenate and deliver sectioned
1340 * message for this node.
1341 */
1342
1343 int port_recv_sections(struct port *sender, unsigned int num_sect,
1344 struct iovec const *msg_sect)
1345 {
1346 struct sk_buff *buf;
1347 int res;
1348
1349 res = msg_build(&sender->publ.phdr, msg_sect, num_sect,
1350 MAX_MSG_SIZE, !sender->user_port, &buf);
1351 if (likely(buf))
1352 port_recv_msg(buf);
1353 return res;
1354 }
1355
1356 /**
1357 * tipc_send - send message sections on connection
1358 */
1359
1360 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1361 {
1362 struct port *p_ptr;
1363 u32 destnode;
1364 int res;
1365
1366 p_ptr = port_deref(ref);
1367 if (!p_ptr || !p_ptr->publ.connected)
1368 return -EINVAL;
1369
1370 p_ptr->publ.congested = 1;
1371 if (!port_congested(p_ptr)) {
1372 destnode = port_peernode(p_ptr);
1373 if (likely(destnode != tipc_own_addr))
1374 res = link_send_sections_fast(p_ptr, msg_sect, num_sect,
1375 destnode);
1376 else
1377 res = port_recv_sections(p_ptr, num_sect, msg_sect);
1378
1379 if (likely(res != -ELINKCONG)) {
1380 port_incr_out_seqno(p_ptr);
1381 p_ptr->publ.congested = 0;
1382 p_ptr->sent++;
1383 return res;
1384 }
1385 }
1386 if (port_unreliable(p_ptr)) {
1387 p_ptr->publ.congested = 0;
1388 /* Just calculate msg length and return */
1389 return msg_calc_data_size(msg_sect, num_sect);
1390 }
1391 return -ELINKCONG;
1392 }
1393
1394 /**
1395 * tipc_send_buf - send message buffer on connection
1396 */
1397
1398 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1399 {
1400 struct port *p_ptr;
1401 struct tipc_msg *msg;
1402 u32 destnode;
1403 u32 hsz;
1404 u32 sz;
1405 u32 res;
1406
1407 p_ptr = port_deref(ref);
1408 if (!p_ptr || !p_ptr->publ.connected)
1409 return -EINVAL;
1410
1411 msg = &p_ptr->publ.phdr;
1412 hsz = msg_hdr_sz(msg);
1413 sz = hsz + dsz;
1414 msg_set_size(msg, sz);
1415 if (skb_cow(buf, hsz))
1416 return -ENOMEM;
1417
1418 skb_push(buf, hsz);
1419 memcpy(buf->data, (unchar *)msg, hsz);
1420 destnode = msg_destnode(msg);
1421 p_ptr->publ.congested = 1;
1422 if (!port_congested(p_ptr)) {
1423 if (likely(destnode != tipc_own_addr))
1424 res = tipc_send_buf_fast(buf, destnode);
1425 else {
1426 port_recv_msg(buf);
1427 res = sz;
1428 }
1429 if (likely(res != -ELINKCONG)) {
1430 port_incr_out_seqno(p_ptr);
1431 p_ptr->sent++;
1432 p_ptr->publ.congested = 0;
1433 return res;
1434 }
1435 }
1436 if (port_unreliable(p_ptr)) {
1437 p_ptr->publ.congested = 0;
1438 return dsz;
1439 }
1440 return -ELINKCONG;
1441 }
1442
1443 /**
1444 * tipc_forward2name - forward message sections to port name
1445 */
1446
1447 int tipc_forward2name(u32 ref,
1448 struct tipc_name const *name,
1449 u32 domain,
1450 u32 num_sect,
1451 struct iovec const *msg_sect,
1452 struct tipc_portid const *orig,
1453 unsigned int importance)
1454 {
1455 struct port *p_ptr;
1456 struct tipc_msg *msg;
1457 u32 destnode = domain;
1458 u32 destport = 0;
1459 int res;
1460
1461 p_ptr = port_deref(ref);
1462 if (!p_ptr || p_ptr->publ.connected)
1463 return -EINVAL;
1464
1465 msg = &p_ptr->publ.phdr;
1466 msg_set_type(msg, TIPC_NAMED_MSG);
1467 msg_set_orignode(msg, orig->node);
1468 msg_set_origport(msg, orig->ref);
1469 msg_set_hdr_sz(msg, LONG_H_SIZE);
1470 msg_set_nametype(msg, name->type);
1471 msg_set_nameinst(msg, name->instance);
1472 msg_set_lookup_scope(msg, addr_scope(domain));
1473 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1474 msg_set_importance(msg,importance);
1475 destport = nametbl_translate(name->type, name->instance, &destnode);
1476 msg_set_destnode(msg, destnode);
1477 msg_set_destport(msg, destport);
1478
1479 if (likely(destport || destnode)) {
1480 p_ptr->sent++;
1481 if (likely(destnode == tipc_own_addr))
1482 return port_recv_sections(p_ptr, num_sect, msg_sect);
1483 res = link_send_sections_fast(p_ptr, msg_sect, num_sect,
1484 destnode);
1485 if (likely(res != -ELINKCONG))
1486 return res;
1487 if (port_unreliable(p_ptr)) {
1488 /* Just calculate msg length and return */
1489 return msg_calc_data_size(msg_sect, num_sect);
1490 }
1491 return -ELINKCONG;
1492 }
1493 return port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1494 TIPC_ERR_NO_NAME);
1495 }
1496
1497 /**
1498 * tipc_send2name - send message sections to port name
1499 */
1500
1501 int tipc_send2name(u32 ref,
1502 struct tipc_name const *name,
1503 unsigned int domain,
1504 unsigned int num_sect,
1505 struct iovec const *msg_sect)
1506 {
1507 struct tipc_portid orig;
1508
1509 orig.ref = ref;
1510 orig.node = tipc_own_addr;
1511 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1512 TIPC_PORT_IMPORTANCE);
1513 }
1514
1515 /**
1516 * tipc_forward_buf2name - forward message buffer to port name
1517 */
1518
1519 int tipc_forward_buf2name(u32 ref,
1520 struct tipc_name const *name,
1521 u32 domain,
1522 struct sk_buff *buf,
1523 unsigned int dsz,
1524 struct tipc_portid const *orig,
1525 unsigned int importance)
1526 {
1527 struct port *p_ptr;
1528 struct tipc_msg *msg;
1529 u32 destnode = domain;
1530 u32 destport = 0;
1531 int res;
1532
1533 p_ptr = (struct port *)ref_deref(ref);
1534 if (!p_ptr || p_ptr->publ.connected)
1535 return -EINVAL;
1536
1537 msg = &p_ptr->publ.phdr;
1538 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1539 msg_set_importance(msg, importance);
1540 msg_set_type(msg, TIPC_NAMED_MSG);
1541 msg_set_orignode(msg, orig->node);
1542 msg_set_origport(msg, orig->ref);
1543 msg_set_nametype(msg, name->type);
1544 msg_set_nameinst(msg, name->instance);
1545 msg_set_lookup_scope(msg, addr_scope(domain));
1546 msg_set_hdr_sz(msg, LONG_H_SIZE);
1547 msg_set_size(msg, LONG_H_SIZE + dsz);
1548 destport = nametbl_translate(name->type, name->instance, &destnode);
1549 msg_set_destnode(msg, destnode);
1550 msg_set_destport(msg, destport);
1551 msg_dbg(msg, "forw2name ==> ");
1552 if (skb_cow(buf, LONG_H_SIZE))
1553 return -ENOMEM;
1554 skb_push(buf, LONG_H_SIZE);
1555 memcpy(buf->data, (unchar *)msg, LONG_H_SIZE);
1556 msg_dbg(buf_msg(buf),"PREP:");
1557 if (likely(destport || destnode)) {
1558 p_ptr->sent++;
1559 if (destnode == tipc_own_addr)
1560 return port_recv_msg(buf);
1561 res = tipc_send_buf_fast(buf, destnode);
1562 if (likely(res != -ELINKCONG))
1563 return res;
1564 if (port_unreliable(p_ptr))
1565 return dsz;
1566 return -ELINKCONG;
1567 }
1568 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1569 }
1570
1571 /**
1572 * tipc_send_buf2name - send message buffer to port name
1573 */
1574
1575 int tipc_send_buf2name(u32 ref,
1576 struct tipc_name const *dest,
1577 u32 domain,
1578 struct sk_buff *buf,
1579 unsigned int dsz)
1580 {
1581 struct tipc_portid orig;
1582
1583 orig.ref = ref;
1584 orig.node = tipc_own_addr;
1585 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1586 TIPC_PORT_IMPORTANCE);
1587 }
1588
1589 /**
1590 * tipc_forward2port - forward message sections to port identity
1591 */
1592
1593 int tipc_forward2port(u32 ref,
1594 struct tipc_portid const *dest,
1595 unsigned int num_sect,
1596 struct iovec const *msg_sect,
1597 struct tipc_portid const *orig,
1598 unsigned int importance)
1599 {
1600 struct port *p_ptr;
1601 struct tipc_msg *msg;
1602 int res;
1603
1604 p_ptr = port_deref(ref);
1605 if (!p_ptr || p_ptr->publ.connected)
1606 return -EINVAL;
1607
1608 msg = &p_ptr->publ.phdr;
1609 msg_set_type(msg, TIPC_DIRECT_MSG);
1610 msg_set_orignode(msg, orig->node);
1611 msg_set_origport(msg, orig->ref);
1612 msg_set_destnode(msg, dest->node);
1613 msg_set_destport(msg, dest->ref);
1614 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1615 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1616 msg_set_importance(msg, importance);
1617 p_ptr->sent++;
1618 if (dest->node == tipc_own_addr)
1619 return port_recv_sections(p_ptr, num_sect, msg_sect);
1620 res = link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1621 if (likely(res != -ELINKCONG))
1622 return res;
1623 if (port_unreliable(p_ptr)) {
1624 /* Just calculate msg length and return */
1625 return msg_calc_data_size(msg_sect, num_sect);
1626 }
1627 return -ELINKCONG;
1628 }
1629
1630 /**
1631 * tipc_send2port - send message sections to port identity
1632 */
1633
1634 int tipc_send2port(u32 ref,
1635 struct tipc_portid const *dest,
1636 unsigned int num_sect,
1637 struct iovec const *msg_sect)
1638 {
1639 struct tipc_portid orig;
1640
1641 orig.ref = ref;
1642 orig.node = tipc_own_addr;
1643 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1644 TIPC_PORT_IMPORTANCE);
1645 }
1646
1647 /**
1648 * tipc_forward_buf2port - forward message buffer to port identity
1649 */
1650 int tipc_forward_buf2port(u32 ref,
1651 struct tipc_portid const *dest,
1652 struct sk_buff *buf,
1653 unsigned int dsz,
1654 struct tipc_portid const *orig,
1655 unsigned int importance)
1656 {
1657 struct port *p_ptr;
1658 struct tipc_msg *msg;
1659 int res;
1660
1661 p_ptr = (struct port *)ref_deref(ref);
1662 if (!p_ptr || p_ptr->publ.connected)
1663 return -EINVAL;
1664
1665 msg = &p_ptr->publ.phdr;
1666 msg_set_type(msg, TIPC_DIRECT_MSG);
1667 msg_set_orignode(msg, orig->node);
1668 msg_set_origport(msg, orig->ref);
1669 msg_set_destnode(msg, dest->node);
1670 msg_set_destport(msg, dest->ref);
1671 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1672 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1673 msg_set_importance(msg, importance);
1674 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1675 if (skb_cow(buf, DIR_MSG_H_SIZE))
1676 return -ENOMEM;
1677
1678 skb_push(buf, DIR_MSG_H_SIZE);
1679 memcpy(buf->data, (unchar *)msg, DIR_MSG_H_SIZE);
1680 msg_dbg(msg, "buf2port: ");
1681 p_ptr->sent++;
1682 if (dest->node == tipc_own_addr)
1683 return port_recv_msg(buf);
1684 res = tipc_send_buf_fast(buf, dest->node);
1685 if (likely(res != -ELINKCONG))
1686 return res;
1687 if (port_unreliable(p_ptr))
1688 return dsz;
1689 return -ELINKCONG;
1690 }
1691
1692 /**
1693 * tipc_send_buf2port - send message buffer to port identity
1694 */
1695
1696 int tipc_send_buf2port(u32 ref,
1697 struct tipc_portid const *dest,
1698 struct sk_buff *buf,
1699 unsigned int dsz)
1700 {
1701 struct tipc_portid orig;
1702
1703 orig.ref = ref;
1704 orig.node = tipc_own_addr;
1705 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1706 TIPC_PORT_IMPORTANCE);
1707 }
1708
Linux kernel - Deliverables
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