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[TIPC]: Optimize stream send routine to avoid fragmentation
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / tipc / port.c
blob5d2b9ce84d0a1016ecc7fe076b31da8b232a6849
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 "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 DEFINE_SPINLOCK(tipc_port_list_lock);
61 static DEFINE_SPINLOCK(queue_lock);
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 msg = buf_msg(buf);
172
173 /* Create destination port list, if one wasn't supplied */
174
175 if (dp == NULL) {
176 tipc_nametbl_mc_translate(msg_nametype(msg),
177 msg_namelower(msg),
178 msg_nameupper(msg),
179 TIPC_CLUSTER_SCOPE,
180 &dports);
181 item = dp = &dports;
182 }
183
184 /* Deliver a copy of message to each destination port */
185
186 if (dp->count != 0) {
187 if (dp->count == 1) {
188 msg_set_destport(msg, dp->ports[0]);
189 tipc_port_recv_msg(buf);
190 tipc_port_list_free(dp);
191 return;
192 }
193 for (; cnt < dp->count; cnt++) {
194 int index = cnt % PLSIZE;
195 struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
196
197 if (b == NULL) {
198 warn("Unable to deliver multicast message(s)\n");
199 msg_dbg(msg, "LOST:");
200 goto exit;
201 }
202 if ((index == 0) && (cnt != 0)) {
203 item = item->next;
204 }
205 msg_set_destport(buf_msg(b),item->ports[index]);
206 tipc_port_recv_msg(b);
207 }
208 }
209 exit:
210 buf_discard(buf);
211 tipc_port_list_free(dp);
212 }
213
214 /**
215 * tipc_createport_raw - create a native TIPC port
216 *
217 * Returns local port reference
218 */
219
220 u32 tipc_createport_raw(void *usr_handle,
221 u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
222 void (*wakeup)(struct tipc_port *),
223 const u32 importance)
224 {
225 struct port *p_ptr;
226 struct tipc_msg *msg;
227 u32 ref;
228
229 p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
230 if (!p_ptr) {
231 warn("Port creation failed, no memory\n");
232 return 0;
233 }
234 ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
235 if (!ref) {
236 warn("Port creation failed, reference table exhausted\n");
237 kfree(p_ptr);
238 return 0;
239 }
240
241 tipc_port_lock(ref);
242 p_ptr->publ.usr_handle = usr_handle;
243 p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
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 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 spin_unlock_bh(p_ptr->publ.lock);
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 spin_unlock_bh(p_ptr->publ.lock);
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_set_msg_option(struct tipc_port *tp_ptr, const char *opt, const u32 sz)
418 {
419 msg_expand(&tp_ptr->phdr, msg_destnode(&tp_ptr->phdr));
420 msg_set_options(&tp_ptr->phdr, opt, sz);
421 return TIPC_OK;
422 }
423
424 int tipc_reject_msg(struct sk_buff *buf, u32 err)
425 {
426 struct tipc_msg *msg = buf_msg(buf);
427 struct sk_buff *rbuf;
428 struct tipc_msg *rmsg;
429 int hdr_sz;
430 u32 imp = msg_importance(msg);
431 u32 data_sz = msg_data_sz(msg);
432
433 if (data_sz > MAX_REJECT_SIZE)
434 data_sz = MAX_REJECT_SIZE;
435 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
436 imp++;
437 msg_dbg(msg, "port->rej: ");
438
439 /* discard rejected message if it shouldn't be returned to sender */
440 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
441 buf_discard(buf);
442 return data_sz;
443 }
444
445 /* construct rejected message */
446 if (msg_mcast(msg))
447 hdr_sz = MCAST_H_SIZE;
448 else
449 hdr_sz = LONG_H_SIZE;
450 rbuf = buf_acquire(data_sz + hdr_sz);
451 if (rbuf == NULL) {
452 buf_discard(buf);
453 return data_sz;
454 }
455 rmsg = buf_msg(rbuf);
456 msg_init(rmsg, imp, msg_type(msg), err, hdr_sz, msg_orignode(msg));
457 msg_set_destport(rmsg, msg_origport(msg));
458 msg_set_prevnode(rmsg, tipc_own_addr);
459 msg_set_origport(rmsg, msg_destport(msg));
460 if (msg_short(msg))
461 msg_set_orignode(rmsg, tipc_own_addr);
462 else
463 msg_set_orignode(rmsg, msg_destnode(msg));
464 msg_set_size(rmsg, data_sz + hdr_sz);
465 msg_set_nametype(rmsg, msg_nametype(msg));
466 msg_set_nameinst(rmsg, msg_nameinst(msg));
467 skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
468
469 /* send self-abort message when rejecting on a connected port */
470 if (msg_connected(msg)) {
471 struct sk_buff *abuf = NULL;
472 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
473
474 if (p_ptr) {
475 if (p_ptr->publ.connected)
476 abuf = port_build_self_abort_msg(p_ptr, err);
477 tipc_port_unlock(p_ptr);
478 }
479 tipc_net_route_msg(abuf);
480 }
481
482 /* send rejected message */
483 buf_discard(buf);
484 tipc_net_route_msg(rbuf);
485 return data_sz;
486 }
487
488 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
489 struct iovec const *msg_sect, u32 num_sect,
490 int err)
491 {
492 struct sk_buff *buf;
493 int res;
494
495 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
496 !p_ptr->user_port, &buf);
497 if (!buf)
498 return res;
499
500 return tipc_reject_msg(buf, err);
501 }
502
503 static void port_timeout(unsigned long ref)
504 {
505 struct port *p_ptr = tipc_port_lock(ref);
506 struct sk_buff *buf = NULL;
507
508 if (!p_ptr)
509 return;
510
511 if (!p_ptr->publ.connected) {
512 tipc_port_unlock(p_ptr);
513 return;
514 }
515
516 /* Last probe answered ? */
517 if (p_ptr->probing_state == PROBING) {
518 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
519 } else {
520 buf = port_build_proto_msg(port_peerport(p_ptr),
521 port_peernode(p_ptr),
522 p_ptr->publ.ref,
523 tipc_own_addr,
524 CONN_MANAGER,
525 CONN_PROBE,
526 TIPC_OK,
527 port_out_seqno(p_ptr),
528 0);
529 port_incr_out_seqno(p_ptr);
530 p_ptr->probing_state = PROBING;
531 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
532 }
533 tipc_port_unlock(p_ptr);
534 tipc_net_route_msg(buf);
535 }
536
537
538 static void port_handle_node_down(unsigned long ref)
539 {
540 struct port *p_ptr = tipc_port_lock(ref);
541 struct sk_buff* buf = NULL;
542
543 if (!p_ptr)
544 return;
545 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
546 tipc_port_unlock(p_ptr);
547 tipc_net_route_msg(buf);
548 }
549
550
551 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
552 {
553 u32 imp = msg_importance(&p_ptr->publ.phdr);
554
555 if (!p_ptr->publ.connected)
556 return NULL;
557 if (imp < TIPC_CRITICAL_IMPORTANCE)
558 imp++;
559 return port_build_proto_msg(p_ptr->publ.ref,
560 tipc_own_addr,
561 port_peerport(p_ptr),
562 port_peernode(p_ptr),
563 imp,
564 TIPC_CONN_MSG,
565 err,
566 p_ptr->last_in_seqno + 1,
567 0);
568 }
569
570
571 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
572 {
573 u32 imp = msg_importance(&p_ptr->publ.phdr);
574
575 if (!p_ptr->publ.connected)
576 return NULL;
577 if (imp < TIPC_CRITICAL_IMPORTANCE)
578 imp++;
579 return port_build_proto_msg(port_peerport(p_ptr),
580 port_peernode(p_ptr),
581 p_ptr->publ.ref,
582 tipc_own_addr,
583 imp,
584 TIPC_CONN_MSG,
585 err,
586 port_out_seqno(p_ptr),
587 0);
588 }
589
590 void tipc_port_recv_proto_msg(struct sk_buff *buf)
591 {
592 struct tipc_msg *msg = buf_msg(buf);
593 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
594 u32 err = TIPC_OK;
595 struct sk_buff *r_buf = NULL;
596 struct sk_buff *abort_buf = NULL;
597
598 msg_dbg(msg, "PORT<RECV<:");
599
600 if (!p_ptr) {
601 err = TIPC_ERR_NO_PORT;
602 } else if (p_ptr->publ.connected) {
603 if (port_peernode(p_ptr) != msg_orignode(msg))
604 err = TIPC_ERR_NO_PORT;
605 if (port_peerport(p_ptr) != msg_origport(msg))
606 err = TIPC_ERR_NO_PORT;
607 if (!err && msg_routed(msg)) {
608 u32 seqno = msg_transp_seqno(msg);
609 u32 myno = ++p_ptr->last_in_seqno;
610 if (seqno != myno) {
611 err = TIPC_ERR_NO_PORT;
612 abort_buf = port_build_self_abort_msg(p_ptr, err);
613 }
614 }
615 if (msg_type(msg) == CONN_ACK) {
616 int wakeup = tipc_port_congested(p_ptr) &&
617 p_ptr->publ.congested &&
618 p_ptr->wakeup;
619 p_ptr->acked += msg_msgcnt(msg);
620 if (tipc_port_congested(p_ptr))
621 goto exit;
622 p_ptr->publ.congested = 0;
623 if (!wakeup)
624 goto exit;
625 p_ptr->wakeup(&p_ptr->publ);
626 goto exit;
627 }
628 } else if (p_ptr->publ.published) {
629 err = TIPC_ERR_NO_PORT;
630 }
631 if (err) {
632 r_buf = port_build_proto_msg(msg_origport(msg),
633 msg_orignode(msg),
634 msg_destport(msg),
635 tipc_own_addr,
636 DATA_HIGH,
637 TIPC_CONN_MSG,
638 err,
639 0,
640 0);
641 goto exit;
642 }
643
644 /* All is fine */
645 if (msg_type(msg) == CONN_PROBE) {
646 r_buf = port_build_proto_msg(msg_origport(msg),
647 msg_orignode(msg),
648 msg_destport(msg),
649 tipc_own_addr,
650 CONN_MANAGER,
651 CONN_PROBE_REPLY,
652 TIPC_OK,
653 port_out_seqno(p_ptr),
654 0);
655 }
656 p_ptr->probing_state = CONFIRMED;
657 port_incr_out_seqno(p_ptr);
658 exit:
659 if (p_ptr)
660 tipc_port_unlock(p_ptr);
661 tipc_net_route_msg(r_buf);
662 tipc_net_route_msg(abort_buf);
663 buf_discard(buf);
664 }
665
666 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
667 {
668 struct publication *publ;
669
670 if (full_id)
671 tipc_printf(buf, "<%u.%u.%u:%u>:",
672 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
673 tipc_node(tipc_own_addr), p_ptr->publ.ref);
674 else
675 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
676
677 if (p_ptr->publ.connected) {
678 u32 dport = port_peerport(p_ptr);
679 u32 destnode = port_peernode(p_ptr);
680
681 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
682 tipc_zone(destnode), tipc_cluster(destnode),
683 tipc_node(destnode), dport);
684 if (p_ptr->publ.conn_type != 0)
685 tipc_printf(buf, " via {%u,%u}",
686 p_ptr->publ.conn_type,
687 p_ptr->publ.conn_instance);
688 }
689 else if (p_ptr->publ.published) {
690 tipc_printf(buf, " bound to");
691 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
692 if (publ->lower == publ->upper)
693 tipc_printf(buf, " {%u,%u}", publ->type,
694 publ->lower);
695 else
696 tipc_printf(buf, " {%u,%u,%u}", publ->type,
697 publ->lower, publ->upper);
698 }
699 }
700 tipc_printf(buf, "\n");
701 }
702
703 #define MAX_PORT_QUERY 32768
704
705 struct sk_buff *tipc_port_get_ports(void)
706 {
707 struct sk_buff *buf;
708 struct tlv_desc *rep_tlv;
709 struct print_buf pb;
710 struct port *p_ptr;
711 int str_len;
712
713 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
714 if (!buf)
715 return NULL;
716 rep_tlv = (struct tlv_desc *)buf->data;
717
718 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
719 spin_lock_bh(&tipc_port_list_lock);
720 list_for_each_entry(p_ptr, &ports, port_list) {
721 spin_lock_bh(p_ptr->publ.lock);
722 port_print(p_ptr, &pb, 0);
723 spin_unlock_bh(p_ptr->publ.lock);
724 }
725 spin_unlock_bh(&tipc_port_list_lock);
726 str_len = tipc_printbuf_validate(&pb);
727
728 skb_put(buf, TLV_SPACE(str_len));
729 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
730
731 return buf;
732 }
733
734 #if 0
735
736 #define MAX_PORT_STATS 2000
737
738 struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
739 {
740 u32 ref;
741 struct port *p_ptr;
742 struct sk_buff *buf;
743 struct tlv_desc *rep_tlv;
744 struct print_buf pb;
745 int str_len;
746
747 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
748 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
749
750 ref = *(u32 *)TLV_DATA(req_tlv_area);
751 ref = ntohl(ref);
752
753 p_ptr = tipc_port_lock(ref);
754 if (!p_ptr)
755 return cfg_reply_error_string("port not found");
756
757 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
758 if (!buf) {
759 tipc_port_unlock(p_ptr);
760 return NULL;
761 }
762 rep_tlv = (struct tlv_desc *)buf->data;
763
764 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
765 port_print(p_ptr, &pb, 1);
766 /* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
767 tipc_port_unlock(p_ptr);
768 str_len = tipc_printbuf_validate(&pb);
769
770 skb_put(buf, TLV_SPACE(str_len));
771 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
772
773 return buf;
774 }
775
776 #endif
777
778 void tipc_port_reinit(void)
779 {
780 struct port *p_ptr;
781 struct tipc_msg *msg;
782
783 spin_lock_bh(&tipc_port_list_lock);
784 list_for_each_entry(p_ptr, &ports, port_list) {
785 msg = &p_ptr->publ.phdr;
786 if (msg_orignode(msg) == tipc_own_addr)
787 break;
788 msg_set_orignode(msg, tipc_own_addr);
789 }
790 spin_unlock_bh(&tipc_port_list_lock);
791 }
792
793
794 /*
795 * port_dispatcher_sigh(): Signal handler for messages destinated
796 * to the tipc_port interface.
797 */
798
799 static void port_dispatcher_sigh(void *dummy)
800 {
801 struct sk_buff *buf;
802
803 spin_lock_bh(&queue_lock);
804 buf = msg_queue_head;
805 msg_queue_head = NULL;
806 spin_unlock_bh(&queue_lock);
807
808 while (buf) {
809 struct port *p_ptr;
810 struct user_port *up_ptr;
811 struct tipc_portid orig;
812 struct tipc_name_seq dseq;
813 void *usr_handle;
814 int connected;
815 int published;
816 u32 message_type;
817
818 struct sk_buff *next = buf->next;
819 struct tipc_msg *msg = buf_msg(buf);
820 u32 dref = msg_destport(msg);
821
822 message_type = msg_type(msg);
823 if (message_type > TIPC_DIRECT_MSG)
824 goto reject; /* Unsupported message type */
825
826 p_ptr = tipc_port_lock(dref);
827 if (!p_ptr)
828 goto reject; /* Port deleted while msg in queue */
829
830 orig.ref = msg_origport(msg);
831 orig.node = msg_orignode(msg);
832 up_ptr = p_ptr->user_port;
833 usr_handle = up_ptr->usr_handle;
834 connected = p_ptr->publ.connected;
835 published = p_ptr->publ.published;
836
837 if (unlikely(msg_errcode(msg)))
838 goto err;
839
840 switch (message_type) {
841
842 case TIPC_CONN_MSG:{
843 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
844 u32 peer_port = port_peerport(p_ptr);
845 u32 peer_node = port_peernode(p_ptr);
846
847 spin_unlock_bh(p_ptr->publ.lock);
848 if (unlikely(!connected)) {
849 if (unlikely(published))
850 goto reject;
851 tipc_connect2port(dref,&orig);
852 }
853 if (unlikely(msg_origport(msg) != peer_port))
854 goto reject;
855 if (unlikely(msg_orignode(msg) != peer_node))
856 goto reject;
857 if (unlikely(!cb))
858 goto reject;
859 if (unlikely(++p_ptr->publ.conn_unacked >=
860 TIPC_FLOW_CONTROL_WIN))
861 tipc_acknowledge(dref,
862 p_ptr->publ.conn_unacked);
863 skb_pull(buf, msg_hdr_sz(msg));
864 cb(usr_handle, dref, &buf, msg_data(msg),
865 msg_data_sz(msg));
866 break;
867 }
868 case TIPC_DIRECT_MSG:{
869 tipc_msg_event cb = up_ptr->msg_cb;
870
871 spin_unlock_bh(p_ptr->publ.lock);
872 if (unlikely(connected))
873 goto reject;
874 if (unlikely(!cb))
875 goto reject;
876 skb_pull(buf, msg_hdr_sz(msg));
877 cb(usr_handle, dref, &buf, msg_data(msg),
878 msg_data_sz(msg), msg_importance(msg),
879 &orig);
880 break;
881 }
882 case TIPC_MCAST_MSG:
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 = (message_type == TIPC_NAMED_MSG)
896 ? dseq.lower : msg_nameupper(msg);
897 skb_pull(buf, msg_hdr_sz(msg));
898 cb(usr_handle, dref, &buf, msg_data(msg),
899 msg_data_sz(msg), msg_importance(msg),
900 &orig, &dseq);
901 break;
902 }
903 }
904 if (buf)
905 buf_discard(buf);
906 buf = next;
907 continue;
908 err:
909 switch (message_type) {
910
911 case TIPC_CONN_MSG:{
912 tipc_conn_shutdown_event cb =
913 up_ptr->conn_err_cb;
914 u32 peer_port = port_peerport(p_ptr);
915 u32 peer_node = port_peernode(p_ptr);
916
917 spin_unlock_bh(p_ptr->publ.lock);
918 if (!connected || !cb)
919 break;
920 if (msg_origport(msg) != peer_port)
921 break;
922 if (msg_orignode(msg) != peer_node)
923 break;
924 tipc_disconnect(dref);
925 skb_pull(buf, msg_hdr_sz(msg));
926 cb(usr_handle, dref, &buf, msg_data(msg),
927 msg_data_sz(msg), msg_errcode(msg));
928 break;
929 }
930 case TIPC_DIRECT_MSG:{
931 tipc_msg_err_event cb = up_ptr->err_cb;
932
933 spin_unlock_bh(p_ptr->publ.lock);
934 if (connected || !cb)
935 break;
936 skb_pull(buf, msg_hdr_sz(msg));
937 cb(usr_handle, dref, &buf, msg_data(msg),
938 msg_data_sz(msg), msg_errcode(msg), &orig);
939 break;
940 }
941 case TIPC_MCAST_MSG:
942 case TIPC_NAMED_MSG:{
943 tipc_named_msg_err_event cb =
944 up_ptr->named_err_cb;
945
946 spin_unlock_bh(p_ptr->publ.lock);
947 if (connected || !cb)
948 break;
949 dseq.type = msg_nametype(msg);
950 dseq.lower = msg_nameinst(msg);
951 dseq.upper = (message_type == TIPC_NAMED_MSG)
952 ? dseq.lower : msg_nameupper(msg);
953 skb_pull(buf, msg_hdr_sz(msg));
954 cb(usr_handle, dref, &buf, msg_data(msg),
955 msg_data_sz(msg), msg_errcode(msg), &dseq);
956 break;
957 }
958 }
959 if (buf)
960 buf_discard(buf);
961 buf = next;
962 continue;
963 reject:
964 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
965 buf = next;
966 }
967 }
968
969 /*
970 * port_dispatcher(): Dispatcher for messages destinated
971 * to the tipc_port interface. Called with port locked.
972 */
973
974 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
975 {
976 buf->next = NULL;
977 spin_lock_bh(&queue_lock);
978 if (msg_queue_head) {
979 msg_queue_tail->next = buf;
980 msg_queue_tail = buf;
981 } else {
982 msg_queue_tail = msg_queue_head = buf;
983 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
984 }
985 spin_unlock_bh(&queue_lock);
986 return TIPC_OK;
987 }
988
989 /*
990 * Wake up port after congestion: Called with port locked,
991 *
992 */
993
994 static void port_wakeup_sh(unsigned long ref)
995 {
996 struct port *p_ptr;
997 struct user_port *up_ptr;
998 tipc_continue_event cb = NULL;
999 void *uh = NULL;
1000
1001 p_ptr = tipc_port_lock(ref);
1002 if (p_ptr) {
1003 up_ptr = p_ptr->user_port;
1004 if (up_ptr) {
1005 cb = up_ptr->continue_event_cb;
1006 uh = up_ptr->usr_handle;
1007 }
1008 tipc_port_unlock(p_ptr);
1009 }
1010 if (cb)
1011 cb(uh, ref);
1012 }
1013
1014
1015 static void port_wakeup(struct tipc_port *p_ptr)
1016 {
1017 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
1018 }
1019
1020 void tipc_acknowledge(u32 ref, u32 ack)
1021 {
1022 struct port *p_ptr;
1023 struct sk_buff *buf = NULL;
1024
1025 p_ptr = tipc_port_lock(ref);
1026 if (!p_ptr)
1027 return;
1028 if (p_ptr->publ.connected) {
1029 p_ptr->publ.conn_unacked -= ack;
1030 buf = port_build_proto_msg(port_peerport(p_ptr),
1031 port_peernode(p_ptr),
1032 ref,
1033 tipc_own_addr,
1034 CONN_MANAGER,
1035 CONN_ACK,
1036 TIPC_OK,
1037 port_out_seqno(p_ptr),
1038 ack);
1039 }
1040 tipc_port_unlock(p_ptr);
1041 tipc_net_route_msg(buf);
1042 }
1043
1044 /*
1045 * tipc_createport(): user level call. Will add port to
1046 * registry if non-zero user_ref.
1047 */
1048
1049 int tipc_createport(u32 user_ref,
1050 void *usr_handle,
1051 unsigned int importance,
1052 tipc_msg_err_event error_cb,
1053 tipc_named_msg_err_event named_error_cb,
1054 tipc_conn_shutdown_event conn_error_cb,
1055 tipc_msg_event msg_cb,
1056 tipc_named_msg_event named_msg_cb,
1057 tipc_conn_msg_event conn_msg_cb,
1058 tipc_continue_event continue_event_cb,/* May be zero */
1059 u32 *portref)
1060 {
1061 struct user_port *up_ptr;
1062 struct port *p_ptr;
1063 u32 ref;
1064
1065 up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
1066 if (!up_ptr) {
1067 warn("Port creation failed, no memory\n");
1068 return -ENOMEM;
1069 }
1070 ref = tipc_createport_raw(NULL, port_dispatcher, port_wakeup, importance);
1071 p_ptr = tipc_port_lock(ref);
1072 if (!p_ptr) {
1073 kfree(up_ptr);
1074 return -ENOMEM;
1075 }
1076
1077 p_ptr->user_port = up_ptr;
1078 up_ptr->user_ref = user_ref;
1079 up_ptr->usr_handle = usr_handle;
1080 up_ptr->ref = p_ptr->publ.ref;
1081 up_ptr->err_cb = error_cb;
1082 up_ptr->named_err_cb = named_error_cb;
1083 up_ptr->conn_err_cb = conn_error_cb;
1084 up_ptr->msg_cb = msg_cb;
1085 up_ptr->named_msg_cb = named_msg_cb;
1086 up_ptr->conn_msg_cb = conn_msg_cb;
1087 up_ptr->continue_event_cb = continue_event_cb;
1088 INIT_LIST_HEAD(&up_ptr->uport_list);
1089 tipc_reg_add_port(up_ptr);
1090 *portref = p_ptr->publ.ref;
1091 dbg(" tipc_createport: %x with ref %u\n", p_ptr, p_ptr->publ.ref);
1092 tipc_port_unlock(p_ptr);
1093 return TIPC_OK;
1094 }
1095
1096 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
1097 {
1098 id->ref = ref;
1099 id->node = tipc_own_addr;
1100 return TIPC_OK;
1101 }
1102
1103 int tipc_portimportance(u32 ref, unsigned int *importance)
1104 {
1105 struct port *p_ptr;
1106
1107 p_ptr = tipc_port_lock(ref);
1108 if (!p_ptr)
1109 return -EINVAL;
1110 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1111 spin_unlock_bh(p_ptr->publ.lock);
1112 return TIPC_OK;
1113 }
1114
1115 int tipc_set_portimportance(u32 ref, unsigned int imp)
1116 {
1117 struct port *p_ptr;
1118
1119 if (imp > TIPC_CRITICAL_IMPORTANCE)
1120 return -EINVAL;
1121
1122 p_ptr = tipc_port_lock(ref);
1123 if (!p_ptr)
1124 return -EINVAL;
1125 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1126 spin_unlock_bh(p_ptr->publ.lock);
1127 return TIPC_OK;
1128 }
1129
1130
1131 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1132 {
1133 struct port *p_ptr;
1134 struct publication *publ;
1135 u32 key;
1136 int res = -EINVAL;
1137
1138 p_ptr = tipc_port_lock(ref);
1139 if (!p_ptr)
1140 return -EINVAL;
1141
1142 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1143 "lower = %u, upper = %u\n",
1144 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1145 if (p_ptr->publ.connected)
1146 goto exit;
1147 if (seq->lower > seq->upper)
1148 goto exit;
1149 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1150 goto exit;
1151 key = ref + p_ptr->pub_count + 1;
1152 if (key == ref) {
1153 res = -EADDRINUSE;
1154 goto exit;
1155 }
1156 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1157 scope, p_ptr->publ.ref, key);
1158 if (publ) {
1159 list_add(&publ->pport_list, &p_ptr->publications);
1160 p_ptr->pub_count++;
1161 p_ptr->publ.published = 1;
1162 res = TIPC_OK;
1163 }
1164 exit:
1165 tipc_port_unlock(p_ptr);
1166 return res;
1167 }
1168
1169 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1170 {
1171 struct port *p_ptr;
1172 struct publication *publ;
1173 struct publication *tpubl;
1174 int res = -EINVAL;
1175
1176 p_ptr = tipc_port_lock(ref);
1177 if (!p_ptr)
1178 return -EINVAL;
1179 if (!seq) {
1180 list_for_each_entry_safe(publ, tpubl,
1181 &p_ptr->publications, pport_list) {
1182 tipc_nametbl_withdraw(publ->type, publ->lower,
1183 publ->ref, publ->key);
1184 }
1185 res = TIPC_OK;
1186 } else {
1187 list_for_each_entry_safe(publ, tpubl,
1188 &p_ptr->publications, pport_list) {
1189 if (publ->scope != scope)
1190 continue;
1191 if (publ->type != seq->type)
1192 continue;
1193 if (publ->lower != seq->lower)
1194 continue;
1195 if (publ->upper != seq->upper)
1196 break;
1197 tipc_nametbl_withdraw(publ->type, publ->lower,
1198 publ->ref, publ->key);
1199 res = TIPC_OK;
1200 break;
1201 }
1202 }
1203 if (list_empty(&p_ptr->publications))
1204 p_ptr->publ.published = 0;
1205 tipc_port_unlock(p_ptr);
1206 return res;
1207 }
1208
1209 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1210 {
1211 struct port *p_ptr;
1212 struct tipc_msg *msg;
1213 int res = -EINVAL;
1214
1215 p_ptr = tipc_port_lock(ref);
1216 if (!p_ptr)
1217 return -EINVAL;
1218 if (p_ptr->publ.published || p_ptr->publ.connected)
1219 goto exit;
1220 if (!peer->ref)
1221 goto exit;
1222
1223 msg = &p_ptr->publ.phdr;
1224 msg_set_destnode(msg, peer->node);
1225 msg_set_destport(msg, peer->ref);
1226 msg_set_orignode(msg, tipc_own_addr);
1227 msg_set_origport(msg, p_ptr->publ.ref);
1228 msg_set_transp_seqno(msg, 42);
1229 msg_set_type(msg, TIPC_CONN_MSG);
1230 if (!may_route(peer->node))
1231 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1232 else
1233 msg_set_hdr_sz(msg, LONG_H_SIZE);
1234
1235 p_ptr->probing_interval = PROBING_INTERVAL;
1236 p_ptr->probing_state = CONFIRMED;
1237 p_ptr->publ.connected = 1;
1238 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1239
1240 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1241 (void *)(unsigned long)ref,
1242 (net_ev_handler)port_handle_node_down);
1243 res = TIPC_OK;
1244 exit:
1245 tipc_port_unlock(p_ptr);
1246 p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1247 return res;
1248 }
1249
1250 /*
1251 * tipc_disconnect(): Disconnect port form peer.
1252 * This is a node local operation.
1253 */
1254
1255 int tipc_disconnect(u32 ref)
1256 {
1257 struct port *p_ptr;
1258 int res = -ENOTCONN;
1259
1260 p_ptr = tipc_port_lock(ref);
1261 if (!p_ptr)
1262 return -EINVAL;
1263 if (p_ptr->publ.connected) {
1264 p_ptr->publ.connected = 0;
1265 /* let timer expire on it's own to avoid deadlock! */
1266 tipc_nodesub_unsubscribe(&p_ptr->subscription);
1267 res = TIPC_OK;
1268 }
1269 tipc_port_unlock(p_ptr);
1270 return res;
1271 }
1272
1273 /*
1274 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1275 */
1276 int tipc_shutdown(u32 ref)
1277 {
1278 struct port *p_ptr;
1279 struct sk_buff *buf = NULL;
1280
1281 p_ptr = tipc_port_lock(ref);
1282 if (!p_ptr)
1283 return -EINVAL;
1284
1285 if (p_ptr->publ.connected) {
1286 u32 imp = msg_importance(&p_ptr->publ.phdr);
1287 if (imp < TIPC_CRITICAL_IMPORTANCE)
1288 imp++;
1289 buf = port_build_proto_msg(port_peerport(p_ptr),
1290 port_peernode(p_ptr),
1291 ref,
1292 tipc_own_addr,
1293 imp,
1294 TIPC_CONN_MSG,
1295 TIPC_CONN_SHUTDOWN,
1296 port_out_seqno(p_ptr),
1297 0);
1298 }
1299 tipc_port_unlock(p_ptr);
1300 tipc_net_route_msg(buf);
1301 return tipc_disconnect(ref);
1302 }
1303
1304 int tipc_isconnected(u32 ref, int *isconnected)
1305 {
1306 struct port *p_ptr;
1307
1308 p_ptr = tipc_port_lock(ref);
1309 if (!p_ptr)
1310 return -EINVAL;
1311 *isconnected = p_ptr->publ.connected;
1312 tipc_port_unlock(p_ptr);
1313 return TIPC_OK;
1314 }
1315
1316 int tipc_peer(u32 ref, struct tipc_portid *peer)
1317 {
1318 struct port *p_ptr;
1319 int res;
1320
1321 p_ptr = tipc_port_lock(ref);
1322 if (!p_ptr)
1323 return -EINVAL;
1324 if (p_ptr->publ.connected) {
1325 peer->ref = port_peerport(p_ptr);
1326 peer->node = port_peernode(p_ptr);
1327 res = TIPC_OK;
1328 } else
1329 res = -ENOTCONN;
1330 tipc_port_unlock(p_ptr);
1331 return res;
1332 }
1333
1334 int tipc_ref_valid(u32 ref)
1335 {
1336 /* Works irrespective of type */
1337 return !!tipc_ref_deref(ref);
1338 }
1339
1340
1341 /*
1342 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1343 * message for this node.
1344 */
1345
1346 int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1347 struct iovec const *msg_sect)
1348 {
1349 struct sk_buff *buf;
1350 int res;
1351
1352 res = msg_build(&sender->publ.phdr, msg_sect, num_sect,
1353 MAX_MSG_SIZE, !sender->user_port, &buf);
1354 if (likely(buf))
1355 tipc_port_recv_msg(buf);
1356 return res;
1357 }
1358
1359 /**
1360 * tipc_send - send message sections on connection
1361 */
1362
1363 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1364 {
1365 struct port *p_ptr;
1366 u32 destnode;
1367 int res;
1368
1369 p_ptr = tipc_port_deref(ref);
1370 if (!p_ptr || !p_ptr->publ.connected)
1371 return -EINVAL;
1372
1373 p_ptr->publ.congested = 1;
1374 if (!tipc_port_congested(p_ptr)) {
1375 destnode = port_peernode(p_ptr);
1376 if (likely(destnode != tipc_own_addr))
1377 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1378 destnode);
1379 else
1380 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1381
1382 if (likely(res != -ELINKCONG)) {
1383 port_incr_out_seqno(p_ptr);
1384 p_ptr->publ.congested = 0;
1385 p_ptr->sent++;
1386 return res;
1387 }
1388 }
1389 if (port_unreliable(p_ptr)) {
1390 p_ptr->publ.congested = 0;
1391 /* Just calculate msg length and return */
1392 return msg_calc_data_size(msg_sect, num_sect);
1393 }
1394 return -ELINKCONG;
1395 }
1396
1397 /**
1398 * tipc_send_buf - send message buffer on connection
1399 */
1400
1401 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1402 {
1403 struct port *p_ptr;
1404 struct tipc_msg *msg;
1405 u32 destnode;
1406 u32 hsz;
1407 u32 sz;
1408 u32 res;
1409
1410 p_ptr = tipc_port_deref(ref);
1411 if (!p_ptr || !p_ptr->publ.connected)
1412 return -EINVAL;
1413
1414 msg = &p_ptr->publ.phdr;
1415 hsz = msg_hdr_sz(msg);
1416 sz = hsz + dsz;
1417 msg_set_size(msg, sz);
1418 if (skb_cow(buf, hsz))
1419 return -ENOMEM;
1420
1421 skb_push(buf, hsz);
1422 skb_copy_to_linear_data(buf, msg, hsz);
1423 destnode = msg_destnode(msg);
1424 p_ptr->publ.congested = 1;
1425 if (!tipc_port_congested(p_ptr)) {
1426 if (likely(destnode != tipc_own_addr))
1427 res = tipc_send_buf_fast(buf, destnode);
1428 else {
1429 tipc_port_recv_msg(buf);
1430 res = sz;
1431 }
1432 if (likely(res != -ELINKCONG)) {
1433 port_incr_out_seqno(p_ptr);
1434 p_ptr->sent++;
1435 p_ptr->publ.congested = 0;
1436 return res;
1437 }
1438 }
1439 if (port_unreliable(p_ptr)) {
1440 p_ptr->publ.congested = 0;
1441 return dsz;
1442 }
1443 return -ELINKCONG;
1444 }
1445
1446 /**
1447 * tipc_forward2name - forward message sections to port name
1448 */
1449
1450 int tipc_forward2name(u32 ref,
1451 struct tipc_name const *name,
1452 u32 domain,
1453 u32 num_sect,
1454 struct iovec const *msg_sect,
1455 struct tipc_portid const *orig,
1456 unsigned int importance)
1457 {
1458 struct port *p_ptr;
1459 struct tipc_msg *msg;
1460 u32 destnode = domain;
1461 u32 destport = 0;
1462 int res;
1463
1464 p_ptr = tipc_port_deref(ref);
1465 if (!p_ptr || p_ptr->publ.connected)
1466 return -EINVAL;
1467
1468 msg = &p_ptr->publ.phdr;
1469 msg_set_type(msg, TIPC_NAMED_MSG);
1470 msg_set_orignode(msg, orig->node);
1471 msg_set_origport(msg, orig->ref);
1472 msg_set_hdr_sz(msg, LONG_H_SIZE);
1473 msg_set_nametype(msg, name->type);
1474 msg_set_nameinst(msg, name->instance);
1475 msg_set_lookup_scope(msg, addr_scope(domain));
1476 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1477 msg_set_importance(msg,importance);
1478 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1479 msg_set_destnode(msg, destnode);
1480 msg_set_destport(msg, destport);
1481
1482 if (likely(destport || destnode)) {
1483 p_ptr->sent++;
1484 if (likely(destnode == tipc_own_addr))
1485 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1486 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1487 destnode);
1488 if (likely(res != -ELINKCONG))
1489 return res;
1490 if (port_unreliable(p_ptr)) {
1491 /* Just calculate msg length and return */
1492 return msg_calc_data_size(msg_sect, num_sect);
1493 }
1494 return -ELINKCONG;
1495 }
1496 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1497 TIPC_ERR_NO_NAME);
1498 }
1499
1500 /**
1501 * tipc_send2name - send message sections to port name
1502 */
1503
1504 int tipc_send2name(u32 ref,
1505 struct tipc_name const *name,
1506 unsigned int domain,
1507 unsigned int num_sect,
1508 struct iovec const *msg_sect)
1509 {
1510 struct tipc_portid orig;
1511
1512 orig.ref = ref;
1513 orig.node = tipc_own_addr;
1514 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1515 TIPC_PORT_IMPORTANCE);
1516 }
1517
1518 /**
1519 * tipc_forward_buf2name - forward message buffer to port name
1520 */
1521
1522 int tipc_forward_buf2name(u32 ref,
1523 struct tipc_name const *name,
1524 u32 domain,
1525 struct sk_buff *buf,
1526 unsigned int dsz,
1527 struct tipc_portid const *orig,
1528 unsigned int importance)
1529 {
1530 struct port *p_ptr;
1531 struct tipc_msg *msg;
1532 u32 destnode = domain;
1533 u32 destport = 0;
1534 int res;
1535
1536 p_ptr = (struct port *)tipc_ref_deref(ref);
1537 if (!p_ptr || p_ptr->publ.connected)
1538 return -EINVAL;
1539
1540 msg = &p_ptr->publ.phdr;
1541 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1542 msg_set_importance(msg, importance);
1543 msg_set_type(msg, TIPC_NAMED_MSG);
1544 msg_set_orignode(msg, orig->node);
1545 msg_set_origport(msg, orig->ref);
1546 msg_set_nametype(msg, name->type);
1547 msg_set_nameinst(msg, name->instance);
1548 msg_set_lookup_scope(msg, addr_scope(domain));
1549 msg_set_hdr_sz(msg, LONG_H_SIZE);
1550 msg_set_size(msg, LONG_H_SIZE + dsz);
1551 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1552 msg_set_destnode(msg, destnode);
1553 msg_set_destport(msg, destport);
1554 msg_dbg(msg, "forw2name ==> ");
1555 if (skb_cow(buf, LONG_H_SIZE))
1556 return -ENOMEM;
1557 skb_push(buf, LONG_H_SIZE);
1558 skb_copy_to_linear_data(buf, msg, LONG_H_SIZE);
1559 msg_dbg(buf_msg(buf),"PREP:");
1560 if (likely(destport || destnode)) {
1561 p_ptr->sent++;
1562 if (destnode == tipc_own_addr)
1563 return tipc_port_recv_msg(buf);
1564 res = tipc_send_buf_fast(buf, destnode);
1565 if (likely(res != -ELINKCONG))
1566 return res;
1567 if (port_unreliable(p_ptr))
1568 return dsz;
1569 return -ELINKCONG;
1570 }
1571 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1572 }
1573
1574 /**
1575 * tipc_send_buf2name - send message buffer to port name
1576 */
1577
1578 int tipc_send_buf2name(u32 ref,
1579 struct tipc_name const *dest,
1580 u32 domain,
1581 struct sk_buff *buf,
1582 unsigned int dsz)
1583 {
1584 struct tipc_portid orig;
1585
1586 orig.ref = ref;
1587 orig.node = tipc_own_addr;
1588 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1589 TIPC_PORT_IMPORTANCE);
1590 }
1591
1592 /**
1593 * tipc_forward2port - forward message sections to port identity
1594 */
1595
1596 int tipc_forward2port(u32 ref,
1597 struct tipc_portid const *dest,
1598 unsigned int num_sect,
1599 struct iovec const *msg_sect,
1600 struct tipc_portid const *orig,
1601 unsigned int importance)
1602 {
1603 struct port *p_ptr;
1604 struct tipc_msg *msg;
1605 int res;
1606
1607 p_ptr = tipc_port_deref(ref);
1608 if (!p_ptr || p_ptr->publ.connected)
1609 return -EINVAL;
1610
1611 msg = &p_ptr->publ.phdr;
1612 msg_set_type(msg, TIPC_DIRECT_MSG);
1613 msg_set_orignode(msg, orig->node);
1614 msg_set_origport(msg, orig->ref);
1615 msg_set_destnode(msg, dest->node);
1616 msg_set_destport(msg, dest->ref);
1617 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1618 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1619 msg_set_importance(msg, importance);
1620 p_ptr->sent++;
1621 if (dest->node == tipc_own_addr)
1622 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1623 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1624 if (likely(res != -ELINKCONG))
1625 return res;
1626 if (port_unreliable(p_ptr)) {
1627 /* Just calculate msg length and return */
1628 return msg_calc_data_size(msg_sect, num_sect);
1629 }
1630 return -ELINKCONG;
1631 }
1632
1633 /**
1634 * tipc_send2port - send message sections to port identity
1635 */
1636
1637 int tipc_send2port(u32 ref,
1638 struct tipc_portid const *dest,
1639 unsigned int num_sect,
1640 struct iovec const *msg_sect)
1641 {
1642 struct tipc_portid orig;
1643
1644 orig.ref = ref;
1645 orig.node = tipc_own_addr;
1646 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1647 TIPC_PORT_IMPORTANCE);
1648 }
1649
1650 /**
1651 * tipc_forward_buf2port - forward message buffer to port identity
1652 */
1653 int tipc_forward_buf2port(u32 ref,
1654 struct tipc_portid const *dest,
1655 struct sk_buff *buf,
1656 unsigned int dsz,
1657 struct tipc_portid const *orig,
1658 unsigned int importance)
1659 {
1660 struct port *p_ptr;
1661 struct tipc_msg *msg;
1662 int res;
1663
1664 p_ptr = (struct port *)tipc_ref_deref(ref);
1665 if (!p_ptr || p_ptr->publ.connected)
1666 return -EINVAL;
1667
1668 msg = &p_ptr->publ.phdr;
1669 msg_set_type(msg, TIPC_DIRECT_MSG);
1670 msg_set_orignode(msg, orig->node);
1671 msg_set_origport(msg, orig->ref);
1672 msg_set_destnode(msg, dest->node);
1673 msg_set_destport(msg, dest->ref);
1674 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1675 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1676 msg_set_importance(msg, importance);
1677 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1678 if (skb_cow(buf, DIR_MSG_H_SIZE))
1679 return -ENOMEM;
1680
1681 skb_push(buf, DIR_MSG_H_SIZE);
1682 skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1683 msg_dbg(msg, "buf2port: ");
1684 p_ptr->sent++;
1685 if (dest->node == tipc_own_addr)
1686 return tipc_port_recv_msg(buf);
1687 res = tipc_send_buf_fast(buf, dest->node);
1688 if (likely(res != -ELINKCONG))
1689 return res;
1690 if (port_unreliable(p_ptr))
1691 return dsz;
1692 return -ELINKCONG;
1693 }
1694
1695 /**
1696 * tipc_send_buf2port - send message buffer to port identity
1697 */
1698
1699 int tipc_send_buf2port(u32 ref,
1700 struct tipc_portid const *dest,
1701 struct sk_buff *buf,
1702 unsigned int dsz)
1703 {
1704 struct tipc_portid orig;
1705
1706 orig.ref = ref;
1707 orig.node = tipc_own_addr;
1708 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1709 TIPC_PORT_IMPORTANCE);
1710 }
1711
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