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tipc: Remove obsolete inclusions of header files
[linux-2.6/cjktty.git] / net / tipc / port.c
blobe822117b79ad175cfa61626c6af9cd867465756d
1 /*
2 * net/tipc/port.c: TIPC port code
3 *
4 * Copyright (c) 1992-2007, Ericsson AB
5 * Copyright (c) 2004-2008, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 #include "core.h"
38 #include "config.h"
39 #include "port.h"
40 #include "name_table.h"
41 #include "user_reg.h"
42
43 /* Connection management: */
44 #define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
45 #define CONFIRMED 0
46 #define PROBING 1
47
48 #define MAX_REJECT_SIZE 1024
49
50 static struct sk_buff *msg_queue_head = NULL;
51 static struct sk_buff *msg_queue_tail = NULL;
52
53 DEFINE_SPINLOCK(tipc_port_list_lock);
54 static DEFINE_SPINLOCK(queue_lock);
55
56 static LIST_HEAD(ports);
57 static void port_handle_node_down(unsigned long ref);
58 static struct sk_buff* port_build_self_abort_msg(struct port *,u32 err);
59 static struct sk_buff* port_build_peer_abort_msg(struct port *,u32 err);
60 static void port_timeout(unsigned long ref);
61
62
63 static u32 port_peernode(struct port *p_ptr)
64 {
65 return msg_destnode(&p_ptr->publ.phdr);
66 }
67
68 static u32 port_peerport(struct port *p_ptr)
69 {
70 return msg_destport(&p_ptr->publ.phdr);
71 }
72
73 static u32 port_out_seqno(struct port *p_ptr)
74 {
75 return msg_transp_seqno(&p_ptr->publ.phdr);
76 }
77
78 static void port_incr_out_seqno(struct port *p_ptr)
79 {
80 struct tipc_msg *m = &p_ptr->publ.phdr;
81
82 if (likely(!msg_routed(m)))
83 return;
84 msg_set_transp_seqno(m, (msg_transp_seqno(m) + 1));
85 }
86
87 /**
88 * tipc_multicast - send a multicast message to local and remote destinations
89 */
90
91 int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, u32 domain,
92 u32 num_sect, struct iovec const *msg_sect)
93 {
94 struct tipc_msg *hdr;
95 struct sk_buff *buf;
96 struct sk_buff *ibuf = NULL;
97 struct port_list dports = {0, NULL, };
98 struct port *oport = tipc_port_deref(ref);
99 int ext_targets;
100 int res;
101
102 if (unlikely(!oport))
103 return -EINVAL;
104
105 /* Create multicast message */
106
107 hdr = &oport->publ.phdr;
108 msg_set_type(hdr, TIPC_MCAST_MSG);
109 msg_set_nametype(hdr, seq->type);
110 msg_set_namelower(hdr, seq->lower);
111 msg_set_nameupper(hdr, seq->upper);
112 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
113 res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
114 !oport->user_port, &buf);
115 if (unlikely(!buf))
116 return res;
117
118 /* Figure out where to send multicast message */
119
120 ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
121 TIPC_NODE_SCOPE, &dports);
122
123 /* Send message to destinations (duplicate it only if necessary) */
124
125 if (ext_targets) {
126 if (dports.count != 0) {
127 ibuf = skb_copy(buf, GFP_ATOMIC);
128 if (ibuf == NULL) {
129 tipc_port_list_free(&dports);
130 buf_discard(buf);
131 return -ENOMEM;
132 }
133 }
134 res = tipc_bclink_send_msg(buf);
135 if ((res < 0) && (dports.count != 0)) {
136 buf_discard(ibuf);
137 }
138 } else {
139 ibuf = buf;
140 }
141
142 if (res >= 0) {
143 if (ibuf)
144 tipc_port_recv_mcast(ibuf, &dports);
145 } else {
146 tipc_port_list_free(&dports);
147 }
148 return res;
149 }
150
151 /**
152 * tipc_port_recv_mcast - deliver multicast message to all destination ports
153 *
154 * If there is no port list, perform a lookup to create one
155 */
156
157 void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
158 {
159 struct tipc_msg* msg;
160 struct port_list dports = {0, NULL, };
161 struct port_list *item = dp;
162 int cnt = 0;
163
164 msg = buf_msg(buf);
165
166 /* Create destination port list, if one wasn't supplied */
167
168 if (dp == NULL) {
169 tipc_nametbl_mc_translate(msg_nametype(msg),
170 msg_namelower(msg),
171 msg_nameupper(msg),
172 TIPC_CLUSTER_SCOPE,
173 &dports);
174 item = dp = &dports;
175 }
176
177 /* Deliver a copy of message to each destination port */
178
179 if (dp->count != 0) {
180 if (dp->count == 1) {
181 msg_set_destport(msg, dp->ports[0]);
182 tipc_port_recv_msg(buf);
183 tipc_port_list_free(dp);
184 return;
185 }
186 for (; cnt < dp->count; cnt++) {
187 int index = cnt % PLSIZE;
188 struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
189
190 if (b == NULL) {
191 warn("Unable to deliver multicast message(s)\n");
192 msg_dbg(msg, "LOST:");
193 goto exit;
194 }
195 if ((index == 0) && (cnt != 0)) {
196 item = item->next;
197 }
198 msg_set_destport(buf_msg(b),item->ports[index]);
199 tipc_port_recv_msg(b);
200 }
201 }
202 exit:
203 buf_discard(buf);
204 tipc_port_list_free(dp);
205 }
206
207 /**
208 * tipc_createport_raw - create a generic TIPC port
209 *
210 * Returns pointer to (locked) TIPC port, or NULL if unable to create it
211 */
212
213 struct tipc_port *tipc_createport_raw(void *usr_handle,
214 u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
215 void (*wakeup)(struct tipc_port *),
216 const u32 importance)
217 {
218 struct port *p_ptr;
219 struct tipc_msg *msg;
220 u32 ref;
221
222 p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
223 if (!p_ptr) {
224 warn("Port creation failed, no memory\n");
225 return NULL;
226 }
227 ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
228 if (!ref) {
229 warn("Port creation failed, reference table exhausted\n");
230 kfree(p_ptr);
231 return NULL;
232 }
233
234 p_ptr->publ.usr_handle = usr_handle;
235 p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
236 p_ptr->publ.ref = ref;
237 msg = &p_ptr->publ.phdr;
238 tipc_msg_init(msg, importance, TIPC_NAMED_MSG, LONG_H_SIZE, 0);
239 msg_set_origport(msg, ref);
240 p_ptr->last_in_seqno = 41;
241 p_ptr->sent = 1;
242 INIT_LIST_HEAD(&p_ptr->wait_list);
243 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
244 p_ptr->dispatcher = dispatcher;
245 p_ptr->wakeup = wakeup;
246 p_ptr->user_port = NULL;
247 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
248 spin_lock_bh(&tipc_port_list_lock);
249 INIT_LIST_HEAD(&p_ptr->publications);
250 INIT_LIST_HEAD(&p_ptr->port_list);
251 list_add_tail(&p_ptr->port_list, &ports);
252 spin_unlock_bh(&tipc_port_list_lock);
253 return &(p_ptr->publ);
254 }
255
256 int tipc_deleteport(u32 ref)
257 {
258 struct port *p_ptr;
259 struct sk_buff *buf = NULL;
260
261 tipc_withdraw(ref, 0, NULL);
262 p_ptr = tipc_port_lock(ref);
263 if (!p_ptr)
264 return -EINVAL;
265
266 tipc_ref_discard(ref);
267 tipc_port_unlock(p_ptr);
268
269 k_cancel_timer(&p_ptr->timer);
270 if (p_ptr->publ.connected) {
271 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
272 tipc_nodesub_unsubscribe(&p_ptr->subscription);
273 }
274 if (p_ptr->user_port) {
275 tipc_reg_remove_port(p_ptr->user_port);
276 kfree(p_ptr->user_port);
277 }
278
279 spin_lock_bh(&tipc_port_list_lock);
280 list_del(&p_ptr->port_list);
281 list_del(&p_ptr->wait_list);
282 spin_unlock_bh(&tipc_port_list_lock);
283 k_term_timer(&p_ptr->timer);
284 kfree(p_ptr);
285 dbg("Deleted port %u\n", ref);
286 tipc_net_route_msg(buf);
287 return 0;
288 }
289
290 static int port_unreliable(struct port *p_ptr)
291 {
292 return msg_src_droppable(&p_ptr->publ.phdr);
293 }
294
295 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
296 {
297 struct port *p_ptr;
298
299 p_ptr = tipc_port_lock(ref);
300 if (!p_ptr)
301 return -EINVAL;
302 *isunreliable = port_unreliable(p_ptr);
303 tipc_port_unlock(p_ptr);
304 return 0;
305 }
306
307 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
308 {
309 struct port *p_ptr;
310
311 p_ptr = tipc_port_lock(ref);
312 if (!p_ptr)
313 return -EINVAL;
314 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
315 tipc_port_unlock(p_ptr);
316 return 0;
317 }
318
319 static int port_unreturnable(struct port *p_ptr)
320 {
321 return msg_dest_droppable(&p_ptr->publ.phdr);
322 }
323
324 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
325 {
326 struct port *p_ptr;
327
328 p_ptr = tipc_port_lock(ref);
329 if (!p_ptr)
330 return -EINVAL;
331 *isunrejectable = port_unreturnable(p_ptr);
332 tipc_port_unlock(p_ptr);
333 return 0;
334 }
335
336 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
337 {
338 struct port *p_ptr;
339
340 p_ptr = tipc_port_lock(ref);
341 if (!p_ptr)
342 return -EINVAL;
343 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
344 tipc_port_unlock(p_ptr);
345 return 0;
346 }
347
348 /*
349 * port_build_proto_msg(): build a port level protocol
350 * or a connection abortion message. Called with
351 * tipc_port lock on.
352 */
353 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
354 u32 origport, u32 orignode,
355 u32 usr, u32 type, u32 err,
356 u32 seqno, u32 ack)
357 {
358 struct sk_buff *buf;
359 struct tipc_msg *msg;
360
361 buf = tipc_buf_acquire(LONG_H_SIZE);
362 if (buf) {
363 msg = buf_msg(buf);
364 tipc_msg_init(msg, usr, type, LONG_H_SIZE, destnode);
365 msg_set_errcode(msg, err);
366 msg_set_destport(msg, destport);
367 msg_set_origport(msg, origport);
368 msg_set_orignode(msg, orignode);
369 msg_set_transp_seqno(msg, seqno);
370 msg_set_msgcnt(msg, ack);
371 msg_dbg(msg, "PORT>SEND>:");
372 }
373 return buf;
374 }
375
376 int tipc_reject_msg(struct sk_buff *buf, u32 err)
377 {
378 struct tipc_msg *msg = buf_msg(buf);
379 struct sk_buff *rbuf;
380 struct tipc_msg *rmsg;
381 int hdr_sz;
382 u32 imp = msg_importance(msg);
383 u32 data_sz = msg_data_sz(msg);
384
385 if (data_sz > MAX_REJECT_SIZE)
386 data_sz = MAX_REJECT_SIZE;
387 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
388 imp++;
389 msg_dbg(msg, "port->rej: ");
390
391 /* discard rejected message if it shouldn't be returned to sender */
392 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
393 buf_discard(buf);
394 return data_sz;
395 }
396
397 /* construct rejected message */
398 if (msg_mcast(msg))
399 hdr_sz = MCAST_H_SIZE;
400 else
401 hdr_sz = LONG_H_SIZE;
402 rbuf = tipc_buf_acquire(data_sz + hdr_sz);
403 if (rbuf == NULL) {
404 buf_discard(buf);
405 return data_sz;
406 }
407 rmsg = buf_msg(rbuf);
408 tipc_msg_init(rmsg, imp, msg_type(msg), hdr_sz, msg_orignode(msg));
409 msg_set_errcode(rmsg, err);
410 msg_set_destport(rmsg, msg_origport(msg));
411 msg_set_origport(rmsg, msg_destport(msg));
412 if (msg_short(msg)) {
413 msg_set_orignode(rmsg, tipc_own_addr);
414 /* leave name type & instance as zeroes */
415 } else {
416 msg_set_orignode(rmsg, msg_destnode(msg));
417 msg_set_nametype(rmsg, msg_nametype(msg));
418 msg_set_nameinst(rmsg, msg_nameinst(msg));
419 }
420 msg_set_size(rmsg, data_sz + hdr_sz);
421 skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
422
423 /* send self-abort message when rejecting on a connected port */
424 if (msg_connected(msg)) {
425 struct sk_buff *abuf = NULL;
426 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
427
428 if (p_ptr) {
429 if (p_ptr->publ.connected)
430 abuf = port_build_self_abort_msg(p_ptr, err);
431 tipc_port_unlock(p_ptr);
432 }
433 tipc_net_route_msg(abuf);
434 }
435
436 /* send rejected message */
437 buf_discard(buf);
438 tipc_net_route_msg(rbuf);
439 return data_sz;
440 }
441
442 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
443 struct iovec const *msg_sect, u32 num_sect,
444 int err)
445 {
446 struct sk_buff *buf;
447 int res;
448
449 res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
450 !p_ptr->user_port, &buf);
451 if (!buf)
452 return res;
453
454 return tipc_reject_msg(buf, err);
455 }
456
457 static void port_timeout(unsigned long ref)
458 {
459 struct port *p_ptr = tipc_port_lock(ref);
460 struct sk_buff *buf = NULL;
461
462 if (!p_ptr)
463 return;
464
465 if (!p_ptr->publ.connected) {
466 tipc_port_unlock(p_ptr);
467 return;
468 }
469
470 /* Last probe answered ? */
471 if (p_ptr->probing_state == PROBING) {
472 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
473 } else {
474 buf = port_build_proto_msg(port_peerport(p_ptr),
475 port_peernode(p_ptr),
476 p_ptr->publ.ref,
477 tipc_own_addr,
478 CONN_MANAGER,
479 CONN_PROBE,
480 TIPC_OK,
481 port_out_seqno(p_ptr),
482 0);
483 port_incr_out_seqno(p_ptr);
484 p_ptr->probing_state = PROBING;
485 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
486 }
487 tipc_port_unlock(p_ptr);
488 tipc_net_route_msg(buf);
489 }
490
491
492 static void port_handle_node_down(unsigned long ref)
493 {
494 struct port *p_ptr = tipc_port_lock(ref);
495 struct sk_buff* buf = NULL;
496
497 if (!p_ptr)
498 return;
499 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
500 tipc_port_unlock(p_ptr);
501 tipc_net_route_msg(buf);
502 }
503
504
505 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
506 {
507 u32 imp = msg_importance(&p_ptr->publ.phdr);
508
509 if (!p_ptr->publ.connected)
510 return NULL;
511 if (imp < TIPC_CRITICAL_IMPORTANCE)
512 imp++;
513 return port_build_proto_msg(p_ptr->publ.ref,
514 tipc_own_addr,
515 port_peerport(p_ptr),
516 port_peernode(p_ptr),
517 imp,
518 TIPC_CONN_MSG,
519 err,
520 p_ptr->last_in_seqno + 1,
521 0);
522 }
523
524
525 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
526 {
527 u32 imp = msg_importance(&p_ptr->publ.phdr);
528
529 if (!p_ptr->publ.connected)
530 return NULL;
531 if (imp < TIPC_CRITICAL_IMPORTANCE)
532 imp++;
533 return port_build_proto_msg(port_peerport(p_ptr),
534 port_peernode(p_ptr),
535 p_ptr->publ.ref,
536 tipc_own_addr,
537 imp,
538 TIPC_CONN_MSG,
539 err,
540 port_out_seqno(p_ptr),
541 0);
542 }
543
544 void tipc_port_recv_proto_msg(struct sk_buff *buf)
545 {
546 struct tipc_msg *msg = buf_msg(buf);
547 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
548 u32 err = TIPC_OK;
549 struct sk_buff *r_buf = NULL;
550 struct sk_buff *abort_buf = NULL;
551
552 msg_dbg(msg, "PORT<RECV<:");
553
554 if (!p_ptr) {
555 err = TIPC_ERR_NO_PORT;
556 } else if (p_ptr->publ.connected) {
557 if ((port_peernode(p_ptr) != msg_orignode(msg)) ||
558 (port_peerport(p_ptr) != msg_origport(msg))) {
559 err = TIPC_ERR_NO_PORT;
560 } else if (msg_type(msg) == CONN_ACK) {
561 int wakeup = tipc_port_congested(p_ptr) &&
562 p_ptr->publ.congested &&
563 p_ptr->wakeup;
564 p_ptr->acked += msg_msgcnt(msg);
565 if (tipc_port_congested(p_ptr))
566 goto exit;
567 p_ptr->publ.congested = 0;
568 if (!wakeup)
569 goto exit;
570 p_ptr->wakeup(&p_ptr->publ);
571 goto exit;
572 }
573 } else if (p_ptr->publ.published) {
574 err = TIPC_ERR_NO_PORT;
575 }
576 if (err) {
577 r_buf = port_build_proto_msg(msg_origport(msg),
578 msg_orignode(msg),
579 msg_destport(msg),
580 tipc_own_addr,
581 TIPC_HIGH_IMPORTANCE,
582 TIPC_CONN_MSG,
583 err,
584 0,
585 0);
586 goto exit;
587 }
588
589 /* All is fine */
590 if (msg_type(msg) == CONN_PROBE) {
591 r_buf = port_build_proto_msg(msg_origport(msg),
592 msg_orignode(msg),
593 msg_destport(msg),
594 tipc_own_addr,
595 CONN_MANAGER,
596 CONN_PROBE_REPLY,
597 TIPC_OK,
598 port_out_seqno(p_ptr),
599 0);
600 }
601 p_ptr->probing_state = CONFIRMED;
602 port_incr_out_seqno(p_ptr);
603 exit:
604 if (p_ptr)
605 tipc_port_unlock(p_ptr);
606 tipc_net_route_msg(r_buf);
607 tipc_net_route_msg(abort_buf);
608 buf_discard(buf);
609 }
610
611 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
612 {
613 struct publication *publ;
614
615 if (full_id)
616 tipc_printf(buf, "<%u.%u.%u:%u>:",
617 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
618 tipc_node(tipc_own_addr), p_ptr->publ.ref);
619 else
620 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
621
622 if (p_ptr->publ.connected) {
623 u32 dport = port_peerport(p_ptr);
624 u32 destnode = port_peernode(p_ptr);
625
626 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
627 tipc_zone(destnode), tipc_cluster(destnode),
628 tipc_node(destnode), dport);
629 if (p_ptr->publ.conn_type != 0)
630 tipc_printf(buf, " via {%u,%u}",
631 p_ptr->publ.conn_type,
632 p_ptr->publ.conn_instance);
633 }
634 else if (p_ptr->publ.published) {
635 tipc_printf(buf, " bound to");
636 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
637 if (publ->lower == publ->upper)
638 tipc_printf(buf, " {%u,%u}", publ->type,
639 publ->lower);
640 else
641 tipc_printf(buf, " {%u,%u,%u}", publ->type,
642 publ->lower, publ->upper);
643 }
644 }
645 tipc_printf(buf, "\n");
646 }
647
648 #define MAX_PORT_QUERY 32768
649
650 struct sk_buff *tipc_port_get_ports(void)
651 {
652 struct sk_buff *buf;
653 struct tlv_desc *rep_tlv;
654 struct print_buf pb;
655 struct port *p_ptr;
656 int str_len;
657
658 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
659 if (!buf)
660 return NULL;
661 rep_tlv = (struct tlv_desc *)buf->data;
662
663 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
664 spin_lock_bh(&tipc_port_list_lock);
665 list_for_each_entry(p_ptr, &ports, port_list) {
666 spin_lock_bh(p_ptr->publ.lock);
667 port_print(p_ptr, &pb, 0);
668 spin_unlock_bh(p_ptr->publ.lock);
669 }
670 spin_unlock_bh(&tipc_port_list_lock);
671 str_len = tipc_printbuf_validate(&pb);
672
673 skb_put(buf, TLV_SPACE(str_len));
674 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
675
676 return buf;
677 }
678
679 void tipc_port_reinit(void)
680 {
681 struct port *p_ptr;
682 struct tipc_msg *msg;
683
684 spin_lock_bh(&tipc_port_list_lock);
685 list_for_each_entry(p_ptr, &ports, port_list) {
686 msg = &p_ptr->publ.phdr;
687 if (msg_orignode(msg) == tipc_own_addr)
688 break;
689 msg_set_prevnode(msg, tipc_own_addr);
690 msg_set_orignode(msg, tipc_own_addr);
691 }
692 spin_unlock_bh(&tipc_port_list_lock);
693 }
694
695
696 /*
697 * port_dispatcher_sigh(): Signal handler for messages destinated
698 * to the tipc_port interface.
699 */
700
701 static void port_dispatcher_sigh(void *dummy)
702 {
703 struct sk_buff *buf;
704
705 spin_lock_bh(&queue_lock);
706 buf = msg_queue_head;
707 msg_queue_head = NULL;
708 spin_unlock_bh(&queue_lock);
709
710 while (buf) {
711 struct port *p_ptr;
712 struct user_port *up_ptr;
713 struct tipc_portid orig;
714 struct tipc_name_seq dseq;
715 void *usr_handle;
716 int connected;
717 int published;
718 u32 message_type;
719
720 struct sk_buff *next = buf->next;
721 struct tipc_msg *msg = buf_msg(buf);
722 u32 dref = msg_destport(msg);
723
724 message_type = msg_type(msg);
725 if (message_type > TIPC_DIRECT_MSG)
726 goto reject; /* Unsupported message type */
727
728 p_ptr = tipc_port_lock(dref);
729 if (!p_ptr)
730 goto reject; /* Port deleted while msg in queue */
731
732 orig.ref = msg_origport(msg);
733 orig.node = msg_orignode(msg);
734 up_ptr = p_ptr->user_port;
735 usr_handle = up_ptr->usr_handle;
736 connected = p_ptr->publ.connected;
737 published = p_ptr->publ.published;
738
739 if (unlikely(msg_errcode(msg)))
740 goto err;
741
742 switch (message_type) {
743
744 case TIPC_CONN_MSG:{
745 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
746 u32 peer_port = port_peerport(p_ptr);
747 u32 peer_node = port_peernode(p_ptr);
748
749 tipc_port_unlock(p_ptr);
750 if (unlikely(!cb))
751 goto reject;
752 if (unlikely(!connected)) {
753 if (tipc_connect2port(dref, &orig))
754 goto reject;
755 } else if ((msg_origport(msg) != peer_port) ||
756 (msg_orignode(msg) != peer_node))
757 goto reject;
758 if (unlikely(++p_ptr->publ.conn_unacked >=
759 TIPC_FLOW_CONTROL_WIN))
760 tipc_acknowledge(dref,
761 p_ptr->publ.conn_unacked);
762 skb_pull(buf, msg_hdr_sz(msg));
763 cb(usr_handle, dref, &buf, msg_data(msg),
764 msg_data_sz(msg));
765 break;
766 }
767 case TIPC_DIRECT_MSG:{
768 tipc_msg_event cb = up_ptr->msg_cb;
769
770 tipc_port_unlock(p_ptr);
771 if (unlikely(!cb || connected))
772 goto reject;
773 skb_pull(buf, msg_hdr_sz(msg));
774 cb(usr_handle, dref, &buf, msg_data(msg),
775 msg_data_sz(msg), msg_importance(msg),
776 &orig);
777 break;
778 }
779 case TIPC_MCAST_MSG:
780 case TIPC_NAMED_MSG:{
781 tipc_named_msg_event cb = up_ptr->named_msg_cb;
782
783 tipc_port_unlock(p_ptr);
784 if (unlikely(!cb || connected || !published))
785 goto reject;
786 dseq.type = msg_nametype(msg);
787 dseq.lower = msg_nameinst(msg);
788 dseq.upper = (message_type == TIPC_NAMED_MSG)
789 ? dseq.lower : msg_nameupper(msg);
790 skb_pull(buf, msg_hdr_sz(msg));
791 cb(usr_handle, dref, &buf, msg_data(msg),
792 msg_data_sz(msg), msg_importance(msg),
793 &orig, &dseq);
794 break;
795 }
796 }
797 if (buf)
798 buf_discard(buf);
799 buf = next;
800 continue;
801 err:
802 switch (message_type) {
803
804 case TIPC_CONN_MSG:{
805 tipc_conn_shutdown_event cb =
806 up_ptr->conn_err_cb;
807 u32 peer_port = port_peerport(p_ptr);
808 u32 peer_node = port_peernode(p_ptr);
809
810 tipc_port_unlock(p_ptr);
811 if (!cb || !connected)
812 break;
813 if ((msg_origport(msg) != peer_port) ||
814 (msg_orignode(msg) != peer_node))
815 break;
816 tipc_disconnect(dref);
817 skb_pull(buf, msg_hdr_sz(msg));
818 cb(usr_handle, dref, &buf, msg_data(msg),
819 msg_data_sz(msg), msg_errcode(msg));
820 break;
821 }
822 case TIPC_DIRECT_MSG:{
823 tipc_msg_err_event cb = up_ptr->err_cb;
824
825 tipc_port_unlock(p_ptr);
826 if (!cb || connected)
827 break;
828 skb_pull(buf, msg_hdr_sz(msg));
829 cb(usr_handle, dref, &buf, msg_data(msg),
830 msg_data_sz(msg), msg_errcode(msg), &orig);
831 break;
832 }
833 case TIPC_MCAST_MSG:
834 case TIPC_NAMED_MSG:{
835 tipc_named_msg_err_event cb =
836 up_ptr->named_err_cb;
837
838 tipc_port_unlock(p_ptr);
839 if (!cb || connected)
840 break;
841 dseq.type = msg_nametype(msg);
842 dseq.lower = msg_nameinst(msg);
843 dseq.upper = (message_type == TIPC_NAMED_MSG)
844 ? dseq.lower : msg_nameupper(msg);
845 skb_pull(buf, msg_hdr_sz(msg));
846 cb(usr_handle, dref, &buf, msg_data(msg),
847 msg_data_sz(msg), msg_errcode(msg), &dseq);
848 break;
849 }
850 }
851 if (buf)
852 buf_discard(buf);
853 buf = next;
854 continue;
855 reject:
856 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
857 buf = next;
858 }
859 }
860
861 /*
862 * port_dispatcher(): Dispatcher for messages destinated
863 * to the tipc_port interface. Called with port locked.
864 */
865
866 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
867 {
868 buf->next = NULL;
869 spin_lock_bh(&queue_lock);
870 if (msg_queue_head) {
871 msg_queue_tail->next = buf;
872 msg_queue_tail = buf;
873 } else {
874 msg_queue_tail = msg_queue_head = buf;
875 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
876 }
877 spin_unlock_bh(&queue_lock);
878 return 0;
879 }
880
881 /*
882 * Wake up port after congestion: Called with port locked,
883 *
884 */
885
886 static void port_wakeup_sh(unsigned long ref)
887 {
888 struct port *p_ptr;
889 struct user_port *up_ptr;
890 tipc_continue_event cb = NULL;
891 void *uh = NULL;
892
893 p_ptr = tipc_port_lock(ref);
894 if (p_ptr) {
895 up_ptr = p_ptr->user_port;
896 if (up_ptr) {
897 cb = up_ptr->continue_event_cb;
898 uh = up_ptr->usr_handle;
899 }
900 tipc_port_unlock(p_ptr);
901 }
902 if (cb)
903 cb(uh, ref);
904 }
905
906
907 static void port_wakeup(struct tipc_port *p_ptr)
908 {
909 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
910 }
911
912 void tipc_acknowledge(u32 ref, u32 ack)
913 {
914 struct port *p_ptr;
915 struct sk_buff *buf = NULL;
916
917 p_ptr = tipc_port_lock(ref);
918 if (!p_ptr)
919 return;
920 if (p_ptr->publ.connected) {
921 p_ptr->publ.conn_unacked -= ack;
922 buf = port_build_proto_msg(port_peerport(p_ptr),
923 port_peernode(p_ptr),
924 ref,
925 tipc_own_addr,
926 CONN_MANAGER,
927 CONN_ACK,
928 TIPC_OK,
929 port_out_seqno(p_ptr),
930 ack);
931 }
932 tipc_port_unlock(p_ptr);
933 tipc_net_route_msg(buf);
934 }
935
936 /*
937 * tipc_createport(): user level call. Will add port to
938 * registry if non-zero user_ref.
939 */
940
941 int tipc_createport(u32 user_ref,
942 void *usr_handle,
943 unsigned int importance,
944 tipc_msg_err_event error_cb,
945 tipc_named_msg_err_event named_error_cb,
946 tipc_conn_shutdown_event conn_error_cb,
947 tipc_msg_event msg_cb,
948 tipc_named_msg_event named_msg_cb,
949 tipc_conn_msg_event conn_msg_cb,
950 tipc_continue_event continue_event_cb,/* May be zero */
951 u32 *portref)
952 {
953 struct user_port *up_ptr;
954 struct port *p_ptr;
955
956 up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
957 if (!up_ptr) {
958 warn("Port creation failed, no memory\n");
959 return -ENOMEM;
960 }
961 p_ptr = (struct port *)tipc_createport_raw(NULL, port_dispatcher,
962 port_wakeup, importance);
963 if (!p_ptr) {
964 kfree(up_ptr);
965 return -ENOMEM;
966 }
967
968 p_ptr->user_port = up_ptr;
969 up_ptr->user_ref = user_ref;
970 up_ptr->usr_handle = usr_handle;
971 up_ptr->ref = p_ptr->publ.ref;
972 up_ptr->err_cb = error_cb;
973 up_ptr->named_err_cb = named_error_cb;
974 up_ptr->conn_err_cb = conn_error_cb;
975 up_ptr->msg_cb = msg_cb;
976 up_ptr->named_msg_cb = named_msg_cb;
977 up_ptr->conn_msg_cb = conn_msg_cb;
978 up_ptr->continue_event_cb = continue_event_cb;
979 INIT_LIST_HEAD(&up_ptr->uport_list);
980 tipc_reg_add_port(up_ptr);
981 *portref = p_ptr->publ.ref;
982 tipc_port_unlock(p_ptr);
983 return 0;
984 }
985
986 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
987 {
988 id->ref = ref;
989 id->node = tipc_own_addr;
990 return 0;
991 }
992
993 int tipc_portimportance(u32 ref, unsigned int *importance)
994 {
995 struct port *p_ptr;
996
997 p_ptr = tipc_port_lock(ref);
998 if (!p_ptr)
999 return -EINVAL;
1000 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1001 tipc_port_unlock(p_ptr);
1002 return 0;
1003 }
1004
1005 int tipc_set_portimportance(u32 ref, unsigned int imp)
1006 {
1007 struct port *p_ptr;
1008
1009 if (imp > TIPC_CRITICAL_IMPORTANCE)
1010 return -EINVAL;
1011
1012 p_ptr = tipc_port_lock(ref);
1013 if (!p_ptr)
1014 return -EINVAL;
1015 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1016 tipc_port_unlock(p_ptr);
1017 return 0;
1018 }
1019
1020
1021 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1022 {
1023 struct port *p_ptr;
1024 struct publication *publ;
1025 u32 key;
1026 int res = -EINVAL;
1027
1028 p_ptr = tipc_port_lock(ref);
1029 if (!p_ptr)
1030 return -EINVAL;
1031
1032 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1033 "lower = %u, upper = %u\n",
1034 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1035 if (p_ptr->publ.connected)
1036 goto exit;
1037 if (seq->lower > seq->upper)
1038 goto exit;
1039 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1040 goto exit;
1041 key = ref + p_ptr->pub_count + 1;
1042 if (key == ref) {
1043 res = -EADDRINUSE;
1044 goto exit;
1045 }
1046 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1047 scope, p_ptr->publ.ref, key);
1048 if (publ) {
1049 list_add(&publ->pport_list, &p_ptr->publications);
1050 p_ptr->pub_count++;
1051 p_ptr->publ.published = 1;
1052 res = 0;
1053 }
1054 exit:
1055 tipc_port_unlock(p_ptr);
1056 return res;
1057 }
1058
1059 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1060 {
1061 struct port *p_ptr;
1062 struct publication *publ;
1063 struct publication *tpubl;
1064 int res = -EINVAL;
1065
1066 p_ptr = tipc_port_lock(ref);
1067 if (!p_ptr)
1068 return -EINVAL;
1069 if (!seq) {
1070 list_for_each_entry_safe(publ, tpubl,
1071 &p_ptr->publications, pport_list) {
1072 tipc_nametbl_withdraw(publ->type, publ->lower,
1073 publ->ref, publ->key);
1074 }
1075 res = 0;
1076 } else {
1077 list_for_each_entry_safe(publ, tpubl,
1078 &p_ptr->publications, pport_list) {
1079 if (publ->scope != scope)
1080 continue;
1081 if (publ->type != seq->type)
1082 continue;
1083 if (publ->lower != seq->lower)
1084 continue;
1085 if (publ->upper != seq->upper)
1086 break;
1087 tipc_nametbl_withdraw(publ->type, publ->lower,
1088 publ->ref, publ->key);
1089 res = 0;
1090 break;
1091 }
1092 }
1093 if (list_empty(&p_ptr->publications))
1094 p_ptr->publ.published = 0;
1095 tipc_port_unlock(p_ptr);
1096 return res;
1097 }
1098
1099 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1100 {
1101 struct port *p_ptr;
1102 struct tipc_msg *msg;
1103 int res = -EINVAL;
1104
1105 p_ptr = tipc_port_lock(ref);
1106 if (!p_ptr)
1107 return -EINVAL;
1108 if (p_ptr->publ.published || p_ptr->publ.connected)
1109 goto exit;
1110 if (!peer->ref)
1111 goto exit;
1112
1113 msg = &p_ptr->publ.phdr;
1114 msg_set_destnode(msg, peer->node);
1115 msg_set_destport(msg, peer->ref);
1116 msg_set_orignode(msg, tipc_own_addr);
1117 msg_set_origport(msg, p_ptr->publ.ref);
1118 msg_set_transp_seqno(msg, 42);
1119 msg_set_type(msg, TIPC_CONN_MSG);
1120 if (!may_route(peer->node))
1121 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1122 else
1123 msg_set_hdr_sz(msg, LONG_H_SIZE);
1124
1125 p_ptr->probing_interval = PROBING_INTERVAL;
1126 p_ptr->probing_state = CONFIRMED;
1127 p_ptr->publ.connected = 1;
1128 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1129
1130 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1131 (void *)(unsigned long)ref,
1132 (net_ev_handler)port_handle_node_down);
1133 res = 0;
1134 exit:
1135 tipc_port_unlock(p_ptr);
1136 p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1137 return res;
1138 }
1139
1140 /**
1141 * tipc_disconnect_port - disconnect port from peer
1142 *
1143 * Port must be locked.
1144 */
1145
1146 int tipc_disconnect_port(struct tipc_port *tp_ptr)
1147 {
1148 int res;
1149
1150 if (tp_ptr->connected) {
1151 tp_ptr->connected = 0;
1152 /* let timer expire on it's own to avoid deadlock! */
1153 tipc_nodesub_unsubscribe(
1154 &((struct port *)tp_ptr)->subscription);
1155 res = 0;
1156 } else {
1157 res = -ENOTCONN;
1158 }
1159 return res;
1160 }
1161
1162 /*
1163 * tipc_disconnect(): Disconnect port form peer.
1164 * This is a node local operation.
1165 */
1166
1167 int tipc_disconnect(u32 ref)
1168 {
1169 struct port *p_ptr;
1170 int res;
1171
1172 p_ptr = tipc_port_lock(ref);
1173 if (!p_ptr)
1174 return -EINVAL;
1175 res = tipc_disconnect_port((struct tipc_port *)p_ptr);
1176 tipc_port_unlock(p_ptr);
1177 return res;
1178 }
1179
1180 /*
1181 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1182 */
1183 int tipc_shutdown(u32 ref)
1184 {
1185 struct port *p_ptr;
1186 struct sk_buff *buf = NULL;
1187
1188 p_ptr = tipc_port_lock(ref);
1189 if (!p_ptr)
1190 return -EINVAL;
1191
1192 if (p_ptr->publ.connected) {
1193 u32 imp = msg_importance(&p_ptr->publ.phdr);
1194 if (imp < TIPC_CRITICAL_IMPORTANCE)
1195 imp++;
1196 buf = port_build_proto_msg(port_peerport(p_ptr),
1197 port_peernode(p_ptr),
1198 ref,
1199 tipc_own_addr,
1200 imp,
1201 TIPC_CONN_MSG,
1202 TIPC_CONN_SHUTDOWN,
1203 port_out_seqno(p_ptr),
1204 0);
1205 }
1206 tipc_port_unlock(p_ptr);
1207 tipc_net_route_msg(buf);
1208 return tipc_disconnect(ref);
1209 }
1210
1211 /*
1212 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1213 * message for this node.
1214 */
1215
1216 static int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1217 struct iovec const *msg_sect)
1218 {
1219 struct sk_buff *buf;
1220 int res;
1221
1222 res = tipc_msg_build(&sender->publ.phdr, msg_sect, num_sect,
1223 MAX_MSG_SIZE, !sender->user_port, &buf);
1224 if (likely(buf))
1225 tipc_port_recv_msg(buf);
1226 return res;
1227 }
1228
1229 /**
1230 * tipc_send - send message sections on connection
1231 */
1232
1233 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1234 {
1235 struct port *p_ptr;
1236 u32 destnode;
1237 int res;
1238
1239 p_ptr = tipc_port_deref(ref);
1240 if (!p_ptr || !p_ptr->publ.connected)
1241 return -EINVAL;
1242
1243 p_ptr->publ.congested = 1;
1244 if (!tipc_port_congested(p_ptr)) {
1245 destnode = port_peernode(p_ptr);
1246 if (likely(destnode != tipc_own_addr))
1247 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1248 destnode);
1249 else
1250 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1251
1252 if (likely(res != -ELINKCONG)) {
1253 port_incr_out_seqno(p_ptr);
1254 p_ptr->publ.congested = 0;
1255 p_ptr->sent++;
1256 return res;
1257 }
1258 }
1259 if (port_unreliable(p_ptr)) {
1260 p_ptr->publ.congested = 0;
1261 /* Just calculate msg length and return */
1262 return tipc_msg_calc_data_size(msg_sect, num_sect);
1263 }
1264 return -ELINKCONG;
1265 }
1266
1267 /**
1268 * tipc_forward2name - forward message sections to port name
1269 */
1270
1271 static int tipc_forward2name(u32 ref,
1272 struct tipc_name const *name,
1273 u32 domain,
1274 u32 num_sect,
1275 struct iovec const *msg_sect,
1276 struct tipc_portid const *orig,
1277 unsigned int importance)
1278 {
1279 struct port *p_ptr;
1280 struct tipc_msg *msg;
1281 u32 destnode = domain;
1282 u32 destport;
1283 int res;
1284
1285 p_ptr = tipc_port_deref(ref);
1286 if (!p_ptr || p_ptr->publ.connected)
1287 return -EINVAL;
1288
1289 msg = &p_ptr->publ.phdr;
1290 msg_set_type(msg, TIPC_NAMED_MSG);
1291 msg_set_orignode(msg, orig->node);
1292 msg_set_origport(msg, orig->ref);
1293 msg_set_hdr_sz(msg, LONG_H_SIZE);
1294 msg_set_nametype(msg, name->type);
1295 msg_set_nameinst(msg, name->instance);
1296 msg_set_lookup_scope(msg, tipc_addr_scope(domain));
1297 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1298 msg_set_importance(msg,importance);
1299 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1300 msg_set_destnode(msg, destnode);
1301 msg_set_destport(msg, destport);
1302
1303 if (likely(destport)) {
1304 p_ptr->sent++;
1305 if (likely(destnode == tipc_own_addr))
1306 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1307 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1308 destnode);
1309 if (likely(res != -ELINKCONG))
1310 return res;
1311 if (port_unreliable(p_ptr)) {
1312 /* Just calculate msg length and return */
1313 return tipc_msg_calc_data_size(msg_sect, num_sect);
1314 }
1315 return -ELINKCONG;
1316 }
1317 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1318 TIPC_ERR_NO_NAME);
1319 }
1320
1321 /**
1322 * tipc_send2name - send message sections to port name
1323 */
1324
1325 int tipc_send2name(u32 ref,
1326 struct tipc_name const *name,
1327 unsigned int domain,
1328 unsigned int num_sect,
1329 struct iovec const *msg_sect)
1330 {
1331 struct tipc_portid orig;
1332
1333 orig.ref = ref;
1334 orig.node = tipc_own_addr;
1335 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1336 TIPC_PORT_IMPORTANCE);
1337 }
1338
1339 /**
1340 * tipc_forward2port - forward message sections to port identity
1341 */
1342
1343 static int tipc_forward2port(u32 ref,
1344 struct tipc_portid const *dest,
1345 unsigned int num_sect,
1346 struct iovec const *msg_sect,
1347 struct tipc_portid const *orig,
1348 unsigned int importance)
1349 {
1350 struct port *p_ptr;
1351 struct tipc_msg *msg;
1352 int res;
1353
1354 p_ptr = tipc_port_deref(ref);
1355 if (!p_ptr || p_ptr->publ.connected)
1356 return -EINVAL;
1357
1358 msg = &p_ptr->publ.phdr;
1359 msg_set_type(msg, TIPC_DIRECT_MSG);
1360 msg_set_orignode(msg, orig->node);
1361 msg_set_origport(msg, orig->ref);
1362 msg_set_destnode(msg, dest->node);
1363 msg_set_destport(msg, dest->ref);
1364 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1365 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1366 msg_set_importance(msg, importance);
1367 p_ptr->sent++;
1368 if (dest->node == tipc_own_addr)
1369 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1370 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1371 if (likely(res != -ELINKCONG))
1372 return res;
1373 if (port_unreliable(p_ptr)) {
1374 /* Just calculate msg length and return */
1375 return tipc_msg_calc_data_size(msg_sect, num_sect);
1376 }
1377 return -ELINKCONG;
1378 }
1379
1380 /**
1381 * tipc_send2port - send message sections to port identity
1382 */
1383
1384 int tipc_send2port(u32 ref,
1385 struct tipc_portid const *dest,
1386 unsigned int num_sect,
1387 struct iovec const *msg_sect)
1388 {
1389 struct tipc_portid orig;
1390
1391 orig.ref = ref;
1392 orig.node = tipc_own_addr;
1393 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1394 TIPC_PORT_IMPORTANCE);
1395 }
1396
1397 /**
1398 * tipc_forward_buf2port - forward message buffer to port identity
1399 */
1400 static int tipc_forward_buf2port(u32 ref,
1401 struct tipc_portid const *dest,
1402 struct sk_buff *buf,
1403 unsigned int dsz,
1404 struct tipc_portid const *orig,
1405 unsigned int importance)
1406 {
1407 struct port *p_ptr;
1408 struct tipc_msg *msg;
1409 int res;
1410
1411 p_ptr = (struct port *)tipc_ref_deref(ref);
1412 if (!p_ptr || p_ptr->publ.connected)
1413 return -EINVAL;
1414
1415 msg = &p_ptr->publ.phdr;
1416 msg_set_type(msg, TIPC_DIRECT_MSG);
1417 msg_set_orignode(msg, orig->node);
1418 msg_set_origport(msg, orig->ref);
1419 msg_set_destnode(msg, dest->node);
1420 msg_set_destport(msg, dest->ref);
1421 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1422 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1423 msg_set_importance(msg, importance);
1424 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1425 if (skb_cow(buf, DIR_MSG_H_SIZE))
1426 return -ENOMEM;
1427
1428 skb_push(buf, DIR_MSG_H_SIZE);
1429 skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1430 msg_dbg(msg, "buf2port: ");
1431 p_ptr->sent++;
1432 if (dest->node == tipc_own_addr)
1433 return tipc_port_recv_msg(buf);
1434 res = tipc_send_buf_fast(buf, dest->node);
1435 if (likely(res != -ELINKCONG))
1436 return res;
1437 if (port_unreliable(p_ptr))
1438 return dsz;
1439 return -ELINKCONG;
1440 }
1441
1442 /**
1443 * tipc_send_buf2port - send message buffer to port identity
1444 */
1445
1446 int tipc_send_buf2port(u32 ref,
1447 struct tipc_portid const *dest,
1448 struct sk_buff *buf,
1449 unsigned int dsz)
1450 {
1451 struct tipc_portid orig;
1452
1453 orig.ref = ref;
1454 orig.node = tipc_own_addr;
1455 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1456 TIPC_PORT_IMPORTANCE);
1457 }
1458
CJK support for tty framebuffer vt