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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / tipc / port.c
1 /*
2 * net/tipc/port.c: TIPC port code
3 *
4 * Copyright (c) 1992-2007, Ericsson AB
5 * Copyright (c) 2004-2007, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 #include "core.h"
38 #include "config.h"
39 #include "dbg.h"
40 #include "port.h"
41 #include "addr.h"
42 #include "link.h"
43 #include "node.h"
44 #include "name_table.h"
45 #include "user_reg.h"
46 #include "msg.h"
47 #include "bcast.h"
48
49 /* Connection management: */
50 #define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
51 #define CONFIRMED 0
52 #define PROBING 1
53
54 #define MAX_REJECT_SIZE 1024
55
56 static struct sk_buff *msg_queue_head = NULL;
57 static struct sk_buff *msg_queue_tail = NULL;
58
59 DEFINE_SPINLOCK(tipc_port_list_lock);
60 static DEFINE_SPINLOCK(queue_lock);
61
62 static LIST_HEAD(ports);
63 static void port_handle_node_down(unsigned long ref);
64 static struct sk_buff* port_build_self_abort_msg(struct port *,u32 err);
65 static struct sk_buff* port_build_peer_abort_msg(struct port *,u32 err);
66 static void port_timeout(unsigned long ref);
67
68
69 static u32 port_peernode(struct port *p_ptr)
70 {
71 return msg_destnode(&p_ptr->publ.phdr);
72 }
73
74 static u32 port_peerport(struct port *p_ptr)
75 {
76 return msg_destport(&p_ptr->publ.phdr);
77 }
78
79 static u32 port_out_seqno(struct port *p_ptr)
80 {
81 return msg_transp_seqno(&p_ptr->publ.phdr);
82 }
83
84 static void port_incr_out_seqno(struct port *p_ptr)
85 {
86 struct tipc_msg *m = &p_ptr->publ.phdr;
87
88 if (likely(!msg_routed(m)))
89 return;
90 msg_set_transp_seqno(m, (msg_transp_seqno(m) + 1));
91 }
92
93 /**
94 * tipc_multicast - send a multicast message to local and remote destinations
95 */
96
97 int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, u32 domain,
98 u32 num_sect, struct iovec const *msg_sect)
99 {
100 struct tipc_msg *hdr;
101 struct sk_buff *buf;
102 struct sk_buff *ibuf = NULL;
103 struct port_list dports = {0, NULL, };
104 struct port *oport = tipc_port_deref(ref);
105 int ext_targets;
106 int res;
107
108 if (unlikely(!oport))
109 return -EINVAL;
110
111 /* Create multicast message */
112
113 hdr = &oport->publ.phdr;
114 msg_set_type(hdr, TIPC_MCAST_MSG);
115 msg_set_nametype(hdr, seq->type);
116 msg_set_namelower(hdr, seq->lower);
117 msg_set_nameupper(hdr, seq->upper);
118 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
119 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
120 !oport->user_port, &buf);
121 if (unlikely(!buf))
122 return res;
123
124 /* Figure out where to send multicast message */
125
126 ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
127 TIPC_NODE_SCOPE, &dports);
128
129 /* Send message to destinations (duplicate it only if necessary) */
130
131 if (ext_targets) {
132 if (dports.count != 0) {
133 ibuf = skb_copy(buf, GFP_ATOMIC);
134 if (ibuf == NULL) {
135 tipc_port_list_free(&dports);
136 buf_discard(buf);
137 return -ENOMEM;
138 }
139 }
140 res = tipc_bclink_send_msg(buf);
141 if ((res < 0) && (dports.count != 0)) {
142 buf_discard(ibuf);
143 }
144 } else {
145 ibuf = buf;
146 }
147
148 if (res >= 0) {
149 if (ibuf)
150 tipc_port_recv_mcast(ibuf, &dports);
151 } else {
152 tipc_port_list_free(&dports);
153 }
154 return res;
155 }
156
157 /**
158 * tipc_port_recv_mcast - deliver multicast message to all destination ports
159 *
160 * If there is no port list, perform a lookup to create one
161 */
162
163 void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
164 {
165 struct tipc_msg* msg;
166 struct port_list dports = {0, NULL, };
167 struct port_list *item = dp;
168 int cnt = 0;
169
170 msg = buf_msg(buf);
171
172 /* Create destination port list, if one wasn't supplied */
173
174 if (dp == NULL) {
175 tipc_nametbl_mc_translate(msg_nametype(msg),
176 msg_namelower(msg),
177 msg_nameupper(msg),
178 TIPC_CLUSTER_SCOPE,
179 &dports);
180 item = dp = &dports;
181 }
182
183 /* Deliver a copy of message to each destination port */
184
185 if (dp->count != 0) {
186 if (dp->count == 1) {
187 msg_set_destport(msg, dp->ports[0]);
188 tipc_port_recv_msg(buf);
189 tipc_port_list_free(dp);
190 return;
191 }
192 for (; cnt < dp->count; cnt++) {
193 int index = cnt % PLSIZE;
194 struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
195
196 if (b == NULL) {
197 warn("Unable to deliver multicast message(s)\n");
198 msg_dbg(msg, "LOST:");
199 goto exit;
200 }
201 if ((index == 0) && (cnt != 0)) {
202 item = item->next;
203 }
204 msg_set_destport(buf_msg(b),item->ports[index]);
205 tipc_port_recv_msg(b);
206 }
207 }
208 exit:
209 buf_discard(buf);
210 tipc_port_list_free(dp);
211 }
212
213 /**
214 * tipc_createport_raw - create a generic TIPC port
215 *
216 * Returns port reference, or 0 if unable to create it
217 *
218 * Note: The newly created port is returned in the locked state.
219 */
220
221 u32 tipc_createport_raw(void *usr_handle,
222 u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
223 void (*wakeup)(struct tipc_port *),
224 const u32 importance,
225 struct tipc_port **tp_ptr)
226 {
227 struct port *p_ptr;
228 struct tipc_msg *msg;
229 u32 ref;
230
231 p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
232 if (!p_ptr) {
233 warn("Port creation failed, no memory\n");
234 return 0;
235 }
236 ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
237 if (!ref) {
238 warn("Port creation failed, reference table exhausted\n");
239 kfree(p_ptr);
240 return 0;
241 }
242
243 p_ptr->publ.usr_handle = usr_handle;
244 p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
245 p_ptr->publ.ref = ref;
246 msg = &p_ptr->publ.phdr;
247 msg_init(msg, importance, TIPC_NAMED_MSG, LONG_H_SIZE, 0);
248 msg_set_origport(msg, ref);
249 p_ptr->last_in_seqno = 41;
250 p_ptr->sent = 1;
251 INIT_LIST_HEAD(&p_ptr->wait_list);
252 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
253 p_ptr->congested_link = NULL;
254 p_ptr->dispatcher = dispatcher;
255 p_ptr->wakeup = wakeup;
256 p_ptr->user_port = NULL;
257 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
258 spin_lock_bh(&tipc_port_list_lock);
259 INIT_LIST_HEAD(&p_ptr->publications);
260 INIT_LIST_HEAD(&p_ptr->port_list);
261 list_add_tail(&p_ptr->port_list, &ports);
262 spin_unlock_bh(&tipc_port_list_lock);
263 *tp_ptr = &p_ptr->publ;
264 return ref;
265 }
266
267 int tipc_deleteport(u32 ref)
268 {
269 struct port *p_ptr;
270 struct sk_buff *buf = NULL;
271
272 tipc_withdraw(ref, 0, NULL);
273 p_ptr = tipc_port_lock(ref);
274 if (!p_ptr)
275 return -EINVAL;
276
277 tipc_ref_discard(ref);
278 tipc_port_unlock(p_ptr);
279
280 k_cancel_timer(&p_ptr->timer);
281 if (p_ptr->publ.connected) {
282 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
283 tipc_nodesub_unsubscribe(&p_ptr->subscription);
284 }
285 if (p_ptr->user_port) {
286 tipc_reg_remove_port(p_ptr->user_port);
287 kfree(p_ptr->user_port);
288 }
289
290 spin_lock_bh(&tipc_port_list_lock);
291 list_del(&p_ptr->port_list);
292 list_del(&p_ptr->wait_list);
293 spin_unlock_bh(&tipc_port_list_lock);
294 k_term_timer(&p_ptr->timer);
295 kfree(p_ptr);
296 dbg("Deleted port %u\n", ref);
297 tipc_net_route_msg(buf);
298 return TIPC_OK;
299 }
300
301 /**
302 * tipc_get_port() - return port associated with 'ref'
303 *
304 * Note: Port is not locked.
305 */
306
307 struct tipc_port *tipc_get_port(const u32 ref)
308 {
309 return (struct tipc_port *)tipc_ref_deref(ref);
310 }
311
312 /**
313 * tipc_get_handle - return user handle associated to port 'ref'
314 */
315
316 void *tipc_get_handle(const u32 ref)
317 {
318 struct port *p_ptr;
319 void * handle;
320
321 p_ptr = tipc_port_lock(ref);
322 if (!p_ptr)
323 return NULL;
324 handle = p_ptr->publ.usr_handle;
325 tipc_port_unlock(p_ptr);
326 return handle;
327 }
328
329 static int port_unreliable(struct port *p_ptr)
330 {
331 return msg_src_droppable(&p_ptr->publ.phdr);
332 }
333
334 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
335 {
336 struct port *p_ptr;
337
338 p_ptr = tipc_port_lock(ref);
339 if (!p_ptr)
340 return -EINVAL;
341 *isunreliable = port_unreliable(p_ptr);
342 tipc_port_unlock(p_ptr);
343 return TIPC_OK;
344 }
345
346 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
347 {
348 struct port *p_ptr;
349
350 p_ptr = tipc_port_lock(ref);
351 if (!p_ptr)
352 return -EINVAL;
353 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
354 tipc_port_unlock(p_ptr);
355 return TIPC_OK;
356 }
357
358 static int port_unreturnable(struct port *p_ptr)
359 {
360 return msg_dest_droppable(&p_ptr->publ.phdr);
361 }
362
363 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
364 {
365 struct port *p_ptr;
366
367 p_ptr = tipc_port_lock(ref);
368 if (!p_ptr)
369 return -EINVAL;
370 *isunrejectable = port_unreturnable(p_ptr);
371 tipc_port_unlock(p_ptr);
372 return TIPC_OK;
373 }
374
375 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
376 {
377 struct port *p_ptr;
378
379 p_ptr = tipc_port_lock(ref);
380 if (!p_ptr)
381 return -EINVAL;
382 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
383 tipc_port_unlock(p_ptr);
384 return TIPC_OK;
385 }
386
387 /*
388 * port_build_proto_msg(): build a port level protocol
389 * or a connection abortion message. Called with
390 * tipc_port lock on.
391 */
392 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
393 u32 origport, u32 orignode,
394 u32 usr, u32 type, u32 err,
395 u32 seqno, u32 ack)
396 {
397 struct sk_buff *buf;
398 struct tipc_msg *msg;
399
400 buf = buf_acquire(LONG_H_SIZE);
401 if (buf) {
402 msg = buf_msg(buf);
403 msg_init(msg, usr, type, LONG_H_SIZE, destnode);
404 msg_set_errcode(msg, err);
405 msg_set_destport(msg, destport);
406 msg_set_origport(msg, origport);
407 msg_set_orignode(msg, orignode);
408 msg_set_transp_seqno(msg, seqno);
409 msg_set_msgcnt(msg, ack);
410 msg_dbg(msg, "PORT>SEND>:");
411 }
412 return buf;
413 }
414
415 int tipc_reject_msg(struct sk_buff *buf, u32 err)
416 {
417 struct tipc_msg *msg = buf_msg(buf);
418 struct sk_buff *rbuf;
419 struct tipc_msg *rmsg;
420 int hdr_sz;
421 u32 imp = msg_importance(msg);
422 u32 data_sz = msg_data_sz(msg);
423
424 if (data_sz > MAX_REJECT_SIZE)
425 data_sz = MAX_REJECT_SIZE;
426 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
427 imp++;
428 msg_dbg(msg, "port->rej: ");
429
430 /* discard rejected message if it shouldn't be returned to sender */
431 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
432 buf_discard(buf);
433 return data_sz;
434 }
435
436 /* construct rejected message */
437 if (msg_mcast(msg))
438 hdr_sz = MCAST_H_SIZE;
439 else
440 hdr_sz = LONG_H_SIZE;
441 rbuf = buf_acquire(data_sz + hdr_sz);
442 if (rbuf == NULL) {
443 buf_discard(buf);
444 return data_sz;
445 }
446 rmsg = buf_msg(rbuf);
447 msg_init(rmsg, imp, msg_type(msg), hdr_sz, msg_orignode(msg));
448 msg_set_errcode(rmsg, err);
449 msg_set_destport(rmsg, msg_origport(msg));
450 msg_set_origport(rmsg, msg_destport(msg));
451 if (msg_short(msg)) {
452 msg_set_orignode(rmsg, tipc_own_addr);
453 /* leave name type & instance as zeroes */
454 } else {
455 msg_set_orignode(rmsg, msg_destnode(msg));
456 msg_set_nametype(rmsg, msg_nametype(msg));
457 msg_set_nameinst(rmsg, msg_nameinst(msg));
458 }
459 msg_set_size(rmsg, data_sz + hdr_sz);
460 skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
461
462 /* send self-abort message when rejecting on a connected port */
463 if (msg_connected(msg)) {
464 struct sk_buff *abuf = NULL;
465 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
466
467 if (p_ptr) {
468 if (p_ptr->publ.connected)
469 abuf = port_build_self_abort_msg(p_ptr, err);
470 tipc_port_unlock(p_ptr);
471 }
472 tipc_net_route_msg(abuf);
473 }
474
475 /* send rejected message */
476 buf_discard(buf);
477 tipc_net_route_msg(rbuf);
478 return data_sz;
479 }
480
481 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
482 struct iovec const *msg_sect, u32 num_sect,
483 int err)
484 {
485 struct sk_buff *buf;
486 int res;
487
488 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
489 !p_ptr->user_port, &buf);
490 if (!buf)
491 return res;
492
493 return tipc_reject_msg(buf, err);
494 }
495
496 static void port_timeout(unsigned long ref)
497 {
498 struct port *p_ptr = tipc_port_lock(ref);
499 struct sk_buff *buf = NULL;
500
501 if (!p_ptr)
502 return;
503
504 if (!p_ptr->publ.connected) {
505 tipc_port_unlock(p_ptr);
506 return;
507 }
508
509 /* Last probe answered ? */
510 if (p_ptr->probing_state == PROBING) {
511 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
512 } else {
513 buf = port_build_proto_msg(port_peerport(p_ptr),
514 port_peernode(p_ptr),
515 p_ptr->publ.ref,
516 tipc_own_addr,
517 CONN_MANAGER,
518 CONN_PROBE,
519 TIPC_OK,
520 port_out_seqno(p_ptr),
521 0);
522 port_incr_out_seqno(p_ptr);
523 p_ptr->probing_state = PROBING;
524 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
525 }
526 tipc_port_unlock(p_ptr);
527 tipc_net_route_msg(buf);
528 }
529
530
531 static void port_handle_node_down(unsigned long ref)
532 {
533 struct port *p_ptr = tipc_port_lock(ref);
534 struct sk_buff* buf = NULL;
535
536 if (!p_ptr)
537 return;
538 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
539 tipc_port_unlock(p_ptr);
540 tipc_net_route_msg(buf);
541 }
542
543
544 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
545 {
546 u32 imp = msg_importance(&p_ptr->publ.phdr);
547
548 if (!p_ptr->publ.connected)
549 return NULL;
550 if (imp < TIPC_CRITICAL_IMPORTANCE)
551 imp++;
552 return port_build_proto_msg(p_ptr->publ.ref,
553 tipc_own_addr,
554 port_peerport(p_ptr),
555 port_peernode(p_ptr),
556 imp,
557 TIPC_CONN_MSG,
558 err,
559 p_ptr->last_in_seqno + 1,
560 0);
561 }
562
563
564 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
565 {
566 u32 imp = msg_importance(&p_ptr->publ.phdr);
567
568 if (!p_ptr->publ.connected)
569 return NULL;
570 if (imp < TIPC_CRITICAL_IMPORTANCE)
571 imp++;
572 return port_build_proto_msg(port_peerport(p_ptr),
573 port_peernode(p_ptr),
574 p_ptr->publ.ref,
575 tipc_own_addr,
576 imp,
577 TIPC_CONN_MSG,
578 err,
579 port_out_seqno(p_ptr),
580 0);
581 }
582
583 void tipc_port_recv_proto_msg(struct sk_buff *buf)
584 {
585 struct tipc_msg *msg = buf_msg(buf);
586 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
587 u32 err = TIPC_OK;
588 struct sk_buff *r_buf = NULL;
589 struct sk_buff *abort_buf = NULL;
590
591 msg_dbg(msg, "PORT<RECV<:");
592
593 if (!p_ptr) {
594 err = TIPC_ERR_NO_PORT;
595 } else if (p_ptr->publ.connected) {
596 if (port_peernode(p_ptr) != msg_orignode(msg))
597 err = TIPC_ERR_NO_PORT;
598 if (port_peerport(p_ptr) != msg_origport(msg))
599 err = TIPC_ERR_NO_PORT;
600 if (!err && msg_routed(msg)) {
601 u32 seqno = msg_transp_seqno(msg);
602 u32 myno = ++p_ptr->last_in_seqno;
603 if (seqno != myno) {
604 err = TIPC_ERR_NO_PORT;
605 abort_buf = port_build_self_abort_msg(p_ptr, err);
606 }
607 }
608 if (msg_type(msg) == CONN_ACK) {
609 int wakeup = tipc_port_congested(p_ptr) &&
610 p_ptr->publ.congested &&
611 p_ptr->wakeup;
612 p_ptr->acked += msg_msgcnt(msg);
613 if (tipc_port_congested(p_ptr))
614 goto exit;
615 p_ptr->publ.congested = 0;
616 if (!wakeup)
617 goto exit;
618 p_ptr->wakeup(&p_ptr->publ);
619 goto exit;
620 }
621 } else if (p_ptr->publ.published) {
622 err = TIPC_ERR_NO_PORT;
623 }
624 if (err) {
625 r_buf = port_build_proto_msg(msg_origport(msg),
626 msg_orignode(msg),
627 msg_destport(msg),
628 tipc_own_addr,
629 TIPC_HIGH_IMPORTANCE,
630 TIPC_CONN_MSG,
631 err,
632 0,
633 0);
634 goto exit;
635 }
636
637 /* All is fine */
638 if (msg_type(msg) == CONN_PROBE) {
639 r_buf = port_build_proto_msg(msg_origport(msg),
640 msg_orignode(msg),
641 msg_destport(msg),
642 tipc_own_addr,
643 CONN_MANAGER,
644 CONN_PROBE_REPLY,
645 TIPC_OK,
646 port_out_seqno(p_ptr),
647 0);
648 }
649 p_ptr->probing_state = CONFIRMED;
650 port_incr_out_seqno(p_ptr);
651 exit:
652 if (p_ptr)
653 tipc_port_unlock(p_ptr);
654 tipc_net_route_msg(r_buf);
655 tipc_net_route_msg(abort_buf);
656 buf_discard(buf);
657 }
658
659 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
660 {
661 struct publication *publ;
662
663 if (full_id)
664 tipc_printf(buf, "<%u.%u.%u:%u>:",
665 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
666 tipc_node(tipc_own_addr), p_ptr->publ.ref);
667 else
668 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
669
670 if (p_ptr->publ.connected) {
671 u32 dport = port_peerport(p_ptr);
672 u32 destnode = port_peernode(p_ptr);
673
674 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
675 tipc_zone(destnode), tipc_cluster(destnode),
676 tipc_node(destnode), dport);
677 if (p_ptr->publ.conn_type != 0)
678 tipc_printf(buf, " via {%u,%u}",
679 p_ptr->publ.conn_type,
680 p_ptr->publ.conn_instance);
681 }
682 else if (p_ptr->publ.published) {
683 tipc_printf(buf, " bound to");
684 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
685 if (publ->lower == publ->upper)
686 tipc_printf(buf, " {%u,%u}", publ->type,
687 publ->lower);
688 else
689 tipc_printf(buf, " {%u,%u,%u}", publ->type,
690 publ->lower, publ->upper);
691 }
692 }
693 tipc_printf(buf, "\n");
694 }
695
696 #define MAX_PORT_QUERY 32768
697
698 struct sk_buff *tipc_port_get_ports(void)
699 {
700 struct sk_buff *buf;
701 struct tlv_desc *rep_tlv;
702 struct print_buf pb;
703 struct port *p_ptr;
704 int str_len;
705
706 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
707 if (!buf)
708 return NULL;
709 rep_tlv = (struct tlv_desc *)buf->data;
710
711 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
712 spin_lock_bh(&tipc_port_list_lock);
713 list_for_each_entry(p_ptr, &ports, port_list) {
714 spin_lock_bh(p_ptr->publ.lock);
715 port_print(p_ptr, &pb, 0);
716 spin_unlock_bh(p_ptr->publ.lock);
717 }
718 spin_unlock_bh(&tipc_port_list_lock);
719 str_len = tipc_printbuf_validate(&pb);
720
721 skb_put(buf, TLV_SPACE(str_len));
722 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
723
724 return buf;
725 }
726
727 #if 0
728
729 #define MAX_PORT_STATS 2000
730
731 struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
732 {
733 u32 ref;
734 struct port *p_ptr;
735 struct sk_buff *buf;
736 struct tlv_desc *rep_tlv;
737 struct print_buf pb;
738 int str_len;
739
740 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
741 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
742
743 ref = *(u32 *)TLV_DATA(req_tlv_area);
744 ref = ntohl(ref);
745
746 p_ptr = tipc_port_lock(ref);
747 if (!p_ptr)
748 return cfg_reply_error_string("port not found");
749
750 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
751 if (!buf) {
752 tipc_port_unlock(p_ptr);
753 return NULL;
754 }
755 rep_tlv = (struct tlv_desc *)buf->data;
756
757 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
758 port_print(p_ptr, &pb, 1);
759 /* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
760 tipc_port_unlock(p_ptr);
761 str_len = tipc_printbuf_validate(&pb);
762
763 skb_put(buf, TLV_SPACE(str_len));
764 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
765
766 return buf;
767 }
768
769 #endif
770
771 void tipc_port_reinit(void)
772 {
773 struct port *p_ptr;
774 struct tipc_msg *msg;
775
776 spin_lock_bh(&tipc_port_list_lock);
777 list_for_each_entry(p_ptr, &ports, port_list) {
778 msg = &p_ptr->publ.phdr;
779 if (msg_orignode(msg) == tipc_own_addr)
780 break;
781 msg_set_prevnode(msg, tipc_own_addr);
782 msg_set_orignode(msg, tipc_own_addr);
783 }
784 spin_unlock_bh(&tipc_port_list_lock);
785 }
786
787
788 /*
789 * port_dispatcher_sigh(): Signal handler for messages destinated
790 * to the tipc_port interface.
791 */
792
793 static void port_dispatcher_sigh(void *dummy)
794 {
795 struct sk_buff *buf;
796
797 spin_lock_bh(&queue_lock);
798 buf = msg_queue_head;
799 msg_queue_head = NULL;
800 spin_unlock_bh(&queue_lock);
801
802 while (buf) {
803 struct port *p_ptr;
804 struct user_port *up_ptr;
805 struct tipc_portid orig;
806 struct tipc_name_seq dseq;
807 void *usr_handle;
808 int connected;
809 int published;
810 u32 message_type;
811
812 struct sk_buff *next = buf->next;
813 struct tipc_msg *msg = buf_msg(buf);
814 u32 dref = msg_destport(msg);
815
816 message_type = msg_type(msg);
817 if (message_type > TIPC_DIRECT_MSG)
818 goto reject; /* Unsupported message type */
819
820 p_ptr = tipc_port_lock(dref);
821 if (!p_ptr)
822 goto reject; /* Port deleted while msg in queue */
823
824 orig.ref = msg_origport(msg);
825 orig.node = msg_orignode(msg);
826 up_ptr = p_ptr->user_port;
827 usr_handle = up_ptr->usr_handle;
828 connected = p_ptr->publ.connected;
829 published = p_ptr->publ.published;
830
831 if (unlikely(msg_errcode(msg)))
832 goto err;
833
834 switch (message_type) {
835
836 case TIPC_CONN_MSG:{
837 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
838 u32 peer_port = port_peerport(p_ptr);
839 u32 peer_node = port_peernode(p_ptr);
840
841 tipc_port_unlock(p_ptr);
842 if (unlikely(!cb))
843 goto reject;
844 if (unlikely(!connected)) {
845 if (tipc_connect2port(dref, &orig))
846 goto reject;
847 } else if ((msg_origport(msg) != peer_port) ||
848 (msg_orignode(msg) != peer_node))
849 goto reject;
850 if (unlikely(++p_ptr->publ.conn_unacked >=
851 TIPC_FLOW_CONTROL_WIN))
852 tipc_acknowledge(dref,
853 p_ptr->publ.conn_unacked);
854 skb_pull(buf, msg_hdr_sz(msg));
855 cb(usr_handle, dref, &buf, msg_data(msg),
856 msg_data_sz(msg));
857 break;
858 }
859 case TIPC_DIRECT_MSG:{
860 tipc_msg_event cb = up_ptr->msg_cb;
861
862 tipc_port_unlock(p_ptr);
863 if (unlikely(!cb || connected))
864 goto reject;
865 skb_pull(buf, msg_hdr_sz(msg));
866 cb(usr_handle, dref, &buf, msg_data(msg),
867 msg_data_sz(msg), msg_importance(msg),
868 &orig);
869 break;
870 }
871 case TIPC_MCAST_MSG:
872 case TIPC_NAMED_MSG:{
873 tipc_named_msg_event cb = up_ptr->named_msg_cb;
874
875 tipc_port_unlock(p_ptr);
876 if (unlikely(!cb || connected || !published))
877 goto reject;
878 dseq.type = msg_nametype(msg);
879 dseq.lower = msg_nameinst(msg);
880 dseq.upper = (message_type == TIPC_NAMED_MSG)
881 ? dseq.lower : msg_nameupper(msg);
882 skb_pull(buf, msg_hdr_sz(msg));
883 cb(usr_handle, dref, &buf, msg_data(msg),
884 msg_data_sz(msg), msg_importance(msg),
885 &orig, &dseq);
886 break;
887 }
888 }
889 if (buf)
890 buf_discard(buf);
891 buf = next;
892 continue;
893 err:
894 switch (message_type) {
895
896 case TIPC_CONN_MSG:{
897 tipc_conn_shutdown_event cb =
898 up_ptr->conn_err_cb;
899 u32 peer_port = port_peerport(p_ptr);
900 u32 peer_node = port_peernode(p_ptr);
901
902 tipc_port_unlock(p_ptr);
903 if (!cb || !connected)
904 break;
905 if ((msg_origport(msg) != peer_port) ||
906 (msg_orignode(msg) != peer_node))
907 break;
908 tipc_disconnect(dref);
909 skb_pull(buf, msg_hdr_sz(msg));
910 cb(usr_handle, dref, &buf, msg_data(msg),
911 msg_data_sz(msg), msg_errcode(msg));
912 break;
913 }
914 case TIPC_DIRECT_MSG:{
915 tipc_msg_err_event cb = up_ptr->err_cb;
916
917 tipc_port_unlock(p_ptr);
918 if (!cb || connected)
919 break;
920 skb_pull(buf, msg_hdr_sz(msg));
921 cb(usr_handle, dref, &buf, msg_data(msg),
922 msg_data_sz(msg), msg_errcode(msg), &orig);
923 break;
924 }
925 case TIPC_MCAST_MSG:
926 case TIPC_NAMED_MSG:{
927 tipc_named_msg_err_event cb =
928 up_ptr->named_err_cb;
929
930 tipc_port_unlock(p_ptr);
931 if (!cb || connected)
932 break;
933 dseq.type = msg_nametype(msg);
934 dseq.lower = msg_nameinst(msg);
935 dseq.upper = (message_type == TIPC_NAMED_MSG)
936 ? dseq.lower : msg_nameupper(msg);
937 skb_pull(buf, msg_hdr_sz(msg));
938 cb(usr_handle, dref, &buf, msg_data(msg),
939 msg_data_sz(msg), msg_errcode(msg), &dseq);
940 break;
941 }
942 }
943 if (buf)
944 buf_discard(buf);
945 buf = next;
946 continue;
947 reject:
948 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
949 buf = next;
950 }
951 }
952
953 /*
954 * port_dispatcher(): Dispatcher for messages destinated
955 * to the tipc_port interface. Called with port locked.
956 */
957
958 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
959 {
960 buf->next = NULL;
961 spin_lock_bh(&queue_lock);
962 if (msg_queue_head) {
963 msg_queue_tail->next = buf;
964 msg_queue_tail = buf;
965 } else {
966 msg_queue_tail = msg_queue_head = buf;
967 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
968 }
969 spin_unlock_bh(&queue_lock);
970 return TIPC_OK;
971 }
972
973 /*
974 * Wake up port after congestion: Called with port locked,
975 *
976 */
977
978 static void port_wakeup_sh(unsigned long ref)
979 {
980 struct port *p_ptr;
981 struct user_port *up_ptr;
982 tipc_continue_event cb = NULL;
983 void *uh = NULL;
984
985 p_ptr = tipc_port_lock(ref);
986 if (p_ptr) {
987 up_ptr = p_ptr->user_port;
988 if (up_ptr) {
989 cb = up_ptr->continue_event_cb;
990 uh = up_ptr->usr_handle;
991 }
992 tipc_port_unlock(p_ptr);
993 }
994 if (cb)
995 cb(uh, ref);
996 }
997
998
999 static void port_wakeup(struct tipc_port *p_ptr)
1000 {
1001 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
1002 }
1003
1004 void tipc_acknowledge(u32 ref, u32 ack)
1005 {
1006 struct port *p_ptr;
1007 struct sk_buff *buf = NULL;
1008
1009 p_ptr = tipc_port_lock(ref);
1010 if (!p_ptr)
1011 return;
1012 if (p_ptr->publ.connected) {
1013 p_ptr->publ.conn_unacked -= ack;
1014 buf = port_build_proto_msg(port_peerport(p_ptr),
1015 port_peernode(p_ptr),
1016 ref,
1017 tipc_own_addr,
1018 CONN_MANAGER,
1019 CONN_ACK,
1020 TIPC_OK,
1021 port_out_seqno(p_ptr),
1022 ack);
1023 }
1024 tipc_port_unlock(p_ptr);
1025 tipc_net_route_msg(buf);
1026 }
1027
1028 /*
1029 * tipc_createport(): user level call. Will add port to
1030 * registry if non-zero user_ref.
1031 */
1032
1033 int tipc_createport(u32 user_ref,
1034 void *usr_handle,
1035 unsigned int importance,
1036 tipc_msg_err_event error_cb,
1037 tipc_named_msg_err_event named_error_cb,
1038 tipc_conn_shutdown_event conn_error_cb,
1039 tipc_msg_event msg_cb,
1040 tipc_named_msg_event named_msg_cb,
1041 tipc_conn_msg_event conn_msg_cb,
1042 tipc_continue_event continue_event_cb,/* May be zero */
1043 u32 *portref)
1044 {
1045 struct user_port *up_ptr;
1046 struct port *p_ptr;
1047 struct tipc_port *tp_ptr;
1048 u32 ref;
1049
1050 up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
1051 if (!up_ptr) {
1052 warn("Port creation failed, no memory\n");
1053 return -ENOMEM;
1054 }
1055 ref = tipc_createport_raw(NULL, port_dispatcher, port_wakeup,
1056 importance, &tp_ptr);
1057 if (ref == 0) {
1058 kfree(up_ptr);
1059 return -ENOMEM;
1060 }
1061 p_ptr = (struct port *)tp_ptr;
1062
1063 p_ptr->user_port = up_ptr;
1064 up_ptr->user_ref = user_ref;
1065 up_ptr->usr_handle = usr_handle;
1066 up_ptr->ref = p_ptr->publ.ref;
1067 up_ptr->err_cb = error_cb;
1068 up_ptr->named_err_cb = named_error_cb;
1069 up_ptr->conn_err_cb = conn_error_cb;
1070 up_ptr->msg_cb = msg_cb;
1071 up_ptr->named_msg_cb = named_msg_cb;
1072 up_ptr->conn_msg_cb = conn_msg_cb;
1073 up_ptr->continue_event_cb = continue_event_cb;
1074 INIT_LIST_HEAD(&up_ptr->uport_list);
1075 tipc_reg_add_port(up_ptr);
1076 *portref = p_ptr->publ.ref;
1077 dbg(" tipc_createport: %x with ref %u\n", p_ptr, p_ptr->publ.ref);
1078 tipc_port_unlock(p_ptr);
1079 return TIPC_OK;
1080 }
1081
1082 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
1083 {
1084 id->ref = ref;
1085 id->node = tipc_own_addr;
1086 return TIPC_OK;
1087 }
1088
1089 int tipc_portimportance(u32 ref, unsigned int *importance)
1090 {
1091 struct port *p_ptr;
1092
1093 p_ptr = tipc_port_lock(ref);
1094 if (!p_ptr)
1095 return -EINVAL;
1096 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1097 tipc_port_unlock(p_ptr);
1098 return TIPC_OK;
1099 }
1100
1101 int tipc_set_portimportance(u32 ref, unsigned int imp)
1102 {
1103 struct port *p_ptr;
1104
1105 if (imp > TIPC_CRITICAL_IMPORTANCE)
1106 return -EINVAL;
1107
1108 p_ptr = tipc_port_lock(ref);
1109 if (!p_ptr)
1110 return -EINVAL;
1111 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1112 tipc_port_unlock(p_ptr);
1113 return TIPC_OK;
1114 }
1115
1116
1117 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1118 {
1119 struct port *p_ptr;
1120 struct publication *publ;
1121 u32 key;
1122 int res = -EINVAL;
1123
1124 p_ptr = tipc_port_lock(ref);
1125 if (!p_ptr)
1126 return -EINVAL;
1127
1128 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1129 "lower = %u, upper = %u\n",
1130 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1131 if (p_ptr->publ.connected)
1132 goto exit;
1133 if (seq->lower > seq->upper)
1134 goto exit;
1135 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1136 goto exit;
1137 key = ref + p_ptr->pub_count + 1;
1138 if (key == ref) {
1139 res = -EADDRINUSE;
1140 goto exit;
1141 }
1142 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1143 scope, p_ptr->publ.ref, key);
1144 if (publ) {
1145 list_add(&publ->pport_list, &p_ptr->publications);
1146 p_ptr->pub_count++;
1147 p_ptr->publ.published = 1;
1148 res = TIPC_OK;
1149 }
1150 exit:
1151 tipc_port_unlock(p_ptr);
1152 return res;
1153 }
1154
1155 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1156 {
1157 struct port *p_ptr;
1158 struct publication *publ;
1159 struct publication *tpubl;
1160 int res = -EINVAL;
1161
1162 p_ptr = tipc_port_lock(ref);
1163 if (!p_ptr)
1164 return -EINVAL;
1165 if (!seq) {
1166 list_for_each_entry_safe(publ, tpubl,
1167 &p_ptr->publications, pport_list) {
1168 tipc_nametbl_withdraw(publ->type, publ->lower,
1169 publ->ref, publ->key);
1170 }
1171 res = TIPC_OK;
1172 } else {
1173 list_for_each_entry_safe(publ, tpubl,
1174 &p_ptr->publications, pport_list) {
1175 if (publ->scope != scope)
1176 continue;
1177 if (publ->type != seq->type)
1178 continue;
1179 if (publ->lower != seq->lower)
1180 continue;
1181 if (publ->upper != seq->upper)
1182 break;
1183 tipc_nametbl_withdraw(publ->type, publ->lower,
1184 publ->ref, publ->key);
1185 res = TIPC_OK;
1186 break;
1187 }
1188 }
1189 if (list_empty(&p_ptr->publications))
1190 p_ptr->publ.published = 0;
1191 tipc_port_unlock(p_ptr);
1192 return res;
1193 }
1194
1195 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1196 {
1197 struct port *p_ptr;
1198 struct tipc_msg *msg;
1199 int res = -EINVAL;
1200
1201 p_ptr = tipc_port_lock(ref);
1202 if (!p_ptr)
1203 return -EINVAL;
1204 if (p_ptr->publ.published || p_ptr->publ.connected)
1205 goto exit;
1206 if (!peer->ref)
1207 goto exit;
1208
1209 msg = &p_ptr->publ.phdr;
1210 msg_set_destnode(msg, peer->node);
1211 msg_set_destport(msg, peer->ref);
1212 msg_set_orignode(msg, tipc_own_addr);
1213 msg_set_origport(msg, p_ptr->publ.ref);
1214 msg_set_transp_seqno(msg, 42);
1215 msg_set_type(msg, TIPC_CONN_MSG);
1216 if (!may_route(peer->node))
1217 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1218 else
1219 msg_set_hdr_sz(msg, LONG_H_SIZE);
1220
1221 p_ptr->probing_interval = PROBING_INTERVAL;
1222 p_ptr->probing_state = CONFIRMED;
1223 p_ptr->publ.connected = 1;
1224 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1225
1226 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1227 (void *)(unsigned long)ref,
1228 (net_ev_handler)port_handle_node_down);
1229 res = TIPC_OK;
1230 exit:
1231 tipc_port_unlock(p_ptr);
1232 p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1233 return res;
1234 }
1235
1236 /**
1237 * tipc_disconnect_port - disconnect port from peer
1238 *
1239 * Port must be locked.
1240 */
1241
1242 int tipc_disconnect_port(struct tipc_port *tp_ptr)
1243 {
1244 int res;
1245
1246 if (tp_ptr->connected) {
1247 tp_ptr->connected = 0;
1248 /* let timer expire on it's own to avoid deadlock! */
1249 tipc_nodesub_unsubscribe(
1250 &((struct port *)tp_ptr)->subscription);
1251 res = TIPC_OK;
1252 } else {
1253 res = -ENOTCONN;
1254 }
1255 return res;
1256 }
1257
1258 /*
1259 * tipc_disconnect(): Disconnect port form peer.
1260 * This is a node local operation.
1261 */
1262
1263 int tipc_disconnect(u32 ref)
1264 {
1265 struct port *p_ptr;
1266 int res;
1267
1268 p_ptr = tipc_port_lock(ref);
1269 if (!p_ptr)
1270 return -EINVAL;
1271 res = tipc_disconnect_port((struct tipc_port *)p_ptr);
1272 tipc_port_unlock(p_ptr);
1273 return res;
1274 }
1275
1276 /*
1277 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1278 */
1279 int tipc_shutdown(u32 ref)
1280 {
1281 struct port *p_ptr;
1282 struct sk_buff *buf = NULL;
1283
1284 p_ptr = tipc_port_lock(ref);
1285 if (!p_ptr)
1286 return -EINVAL;
1287
1288 if (p_ptr->publ.connected) {
1289 u32 imp = msg_importance(&p_ptr->publ.phdr);
1290 if (imp < TIPC_CRITICAL_IMPORTANCE)
1291 imp++;
1292 buf = port_build_proto_msg(port_peerport(p_ptr),
1293 port_peernode(p_ptr),
1294 ref,
1295 tipc_own_addr,
1296 imp,
1297 TIPC_CONN_MSG,
1298 TIPC_CONN_SHUTDOWN,
1299 port_out_seqno(p_ptr),
1300 0);
1301 }
1302 tipc_port_unlock(p_ptr);
1303 tipc_net_route_msg(buf);
1304 return tipc_disconnect(ref);
1305 }
1306
1307 int tipc_isconnected(u32 ref, int *isconnected)
1308 {
1309 struct port *p_ptr;
1310
1311 p_ptr = tipc_port_lock(ref);
1312 if (!p_ptr)
1313 return -EINVAL;
1314 *isconnected = p_ptr->publ.connected;
1315 tipc_port_unlock(p_ptr);
1316 return TIPC_OK;
1317 }
1318
1319 int tipc_peer(u32 ref, struct tipc_portid *peer)
1320 {
1321 struct port *p_ptr;
1322 int res;
1323
1324 p_ptr = tipc_port_lock(ref);
1325 if (!p_ptr)
1326 return -EINVAL;
1327 if (p_ptr->publ.connected) {
1328 peer->ref = port_peerport(p_ptr);
1329 peer->node = port_peernode(p_ptr);
1330 res = TIPC_OK;
1331 } else
1332 res = -ENOTCONN;
1333 tipc_port_unlock(p_ptr);
1334 return res;
1335 }
1336
1337 int tipc_ref_valid(u32 ref)
1338 {
1339 /* Works irrespective of type */
1340 return !!tipc_ref_deref(ref);
1341 }
1342
1343
1344 /*
1345 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1346 * message for this node.
1347 */
1348
1349 int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1350 struct iovec const *msg_sect)
1351 {
1352 struct sk_buff *buf;
1353 int res;
1354
1355 res = msg_build(&sender->publ.phdr, msg_sect, num_sect,
1356 MAX_MSG_SIZE, !sender->user_port, &buf);
1357 if (likely(buf))
1358 tipc_port_recv_msg(buf);
1359 return res;
1360 }
1361
1362 /**
1363 * tipc_send - send message sections on connection
1364 */
1365
1366 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1367 {
1368 struct port *p_ptr;
1369 u32 destnode;
1370 int res;
1371
1372 p_ptr = tipc_port_deref(ref);
1373 if (!p_ptr || !p_ptr->publ.connected)
1374 return -EINVAL;
1375
1376 p_ptr->publ.congested = 1;
1377 if (!tipc_port_congested(p_ptr)) {
1378 destnode = port_peernode(p_ptr);
1379 if (likely(destnode != tipc_own_addr))
1380 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1381 destnode);
1382 else
1383 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1384
1385 if (likely(res != -ELINKCONG)) {
1386 port_incr_out_seqno(p_ptr);
1387 p_ptr->publ.congested = 0;
1388 p_ptr->sent++;
1389 return res;
1390 }
1391 }
1392 if (port_unreliable(p_ptr)) {
1393 p_ptr->publ.congested = 0;
1394 /* Just calculate msg length and return */
1395 return msg_calc_data_size(msg_sect, num_sect);
1396 }
1397 return -ELINKCONG;
1398 }
1399
1400 /**
1401 * tipc_send_buf - send message buffer on connection
1402 */
1403
1404 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1405 {
1406 struct port *p_ptr;
1407 struct tipc_msg *msg;
1408 u32 destnode;
1409 u32 hsz;
1410 u32 sz;
1411 u32 res;
1412
1413 p_ptr = tipc_port_deref(ref);
1414 if (!p_ptr || !p_ptr->publ.connected)
1415 return -EINVAL;
1416
1417 msg = &p_ptr->publ.phdr;
1418 hsz = msg_hdr_sz(msg);
1419 sz = hsz + dsz;
1420 msg_set_size(msg, sz);
1421 if (skb_cow(buf, hsz))
1422 return -ENOMEM;
1423
1424 skb_push(buf, hsz);
1425 skb_copy_to_linear_data(buf, msg, hsz);
1426 destnode = msg_destnode(msg);
1427 p_ptr->publ.congested = 1;
1428 if (!tipc_port_congested(p_ptr)) {
1429 if (likely(destnode != tipc_own_addr))
1430 res = tipc_send_buf_fast(buf, destnode);
1431 else {
1432 tipc_port_recv_msg(buf);
1433 res = sz;
1434 }
1435 if (likely(res != -ELINKCONG)) {
1436 port_incr_out_seqno(p_ptr);
1437 p_ptr->sent++;
1438 p_ptr->publ.congested = 0;
1439 return res;
1440 }
1441 }
1442 if (port_unreliable(p_ptr)) {
1443 p_ptr->publ.congested = 0;
1444 return dsz;
1445 }
1446 return -ELINKCONG;
1447 }
1448
1449 /**
1450 * tipc_forward2name - forward message sections to port name
1451 */
1452
1453 int tipc_forward2name(u32 ref,
1454 struct tipc_name const *name,
1455 u32 domain,
1456 u32 num_sect,
1457 struct iovec const *msg_sect,
1458 struct tipc_portid const *orig,
1459 unsigned int importance)
1460 {
1461 struct port *p_ptr;
1462 struct tipc_msg *msg;
1463 u32 destnode = domain;
1464 u32 destport = 0;
1465 int res;
1466
1467 p_ptr = tipc_port_deref(ref);
1468 if (!p_ptr || p_ptr->publ.connected)
1469 return -EINVAL;
1470
1471 msg = &p_ptr->publ.phdr;
1472 msg_set_type(msg, TIPC_NAMED_MSG);
1473 msg_set_orignode(msg, orig->node);
1474 msg_set_origport(msg, orig->ref);
1475 msg_set_hdr_sz(msg, LONG_H_SIZE);
1476 msg_set_nametype(msg, name->type);
1477 msg_set_nameinst(msg, name->instance);
1478 msg_set_lookup_scope(msg, addr_scope(domain));
1479 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1480 msg_set_importance(msg,importance);
1481 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1482 msg_set_destnode(msg, destnode);
1483 msg_set_destport(msg, destport);
1484
1485 if (likely(destport || destnode)) {
1486 p_ptr->sent++;
1487 if (likely(destnode == tipc_own_addr))
1488 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1489 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1490 destnode);
1491 if (likely(res != -ELINKCONG))
1492 return res;
1493 if (port_unreliable(p_ptr)) {
1494 /* Just calculate msg length and return */
1495 return msg_calc_data_size(msg_sect, num_sect);
1496 }
1497 return -ELINKCONG;
1498 }
1499 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1500 TIPC_ERR_NO_NAME);
1501 }
1502
1503 /**
1504 * tipc_send2name - send message sections to port name
1505 */
1506
1507 int tipc_send2name(u32 ref,
1508 struct tipc_name const *name,
1509 unsigned int domain,
1510 unsigned int num_sect,
1511 struct iovec const *msg_sect)
1512 {
1513 struct tipc_portid orig;
1514
1515 orig.ref = ref;
1516 orig.node = tipc_own_addr;
1517 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1518 TIPC_PORT_IMPORTANCE);
1519 }
1520
1521 /**
1522 * tipc_forward_buf2name - forward message buffer to port name
1523 */
1524
1525 int tipc_forward_buf2name(u32 ref,
1526 struct tipc_name const *name,
1527 u32 domain,
1528 struct sk_buff *buf,
1529 unsigned int dsz,
1530 struct tipc_portid const *orig,
1531 unsigned int importance)
1532 {
1533 struct port *p_ptr;
1534 struct tipc_msg *msg;
1535 u32 destnode = domain;
1536 u32 destport = 0;
1537 int res;
1538
1539 p_ptr = (struct port *)tipc_ref_deref(ref);
1540 if (!p_ptr || p_ptr->publ.connected)
1541 return -EINVAL;
1542
1543 msg = &p_ptr->publ.phdr;
1544 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1545 msg_set_importance(msg, importance);
1546 msg_set_type(msg, TIPC_NAMED_MSG);
1547 msg_set_orignode(msg, orig->node);
1548 msg_set_origport(msg, orig->ref);
1549 msg_set_nametype(msg, name->type);
1550 msg_set_nameinst(msg, name->instance);
1551 msg_set_lookup_scope(msg, addr_scope(domain));
1552 msg_set_hdr_sz(msg, LONG_H_SIZE);
1553 msg_set_size(msg, LONG_H_SIZE + dsz);
1554 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1555 msg_set_destnode(msg, destnode);
1556 msg_set_destport(msg, destport);
1557 msg_dbg(msg, "forw2name ==> ");
1558 if (skb_cow(buf, LONG_H_SIZE))
1559 return -ENOMEM;
1560 skb_push(buf, LONG_H_SIZE);
1561 skb_copy_to_linear_data(buf, msg, LONG_H_SIZE);
1562 msg_dbg(buf_msg(buf),"PREP:");
1563 if (likely(destport || destnode)) {
1564 p_ptr->sent++;
1565 if (destnode == tipc_own_addr)
1566 return tipc_port_recv_msg(buf);
1567 res = tipc_send_buf_fast(buf, destnode);
1568 if (likely(res != -ELINKCONG))
1569 return res;
1570 if (port_unreliable(p_ptr))
1571 return dsz;
1572 return -ELINKCONG;
1573 }
1574 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1575 }
1576
1577 /**
1578 * tipc_send_buf2name - send message buffer to port name
1579 */
1580
1581 int tipc_send_buf2name(u32 ref,
1582 struct tipc_name const *dest,
1583 u32 domain,
1584 struct sk_buff *buf,
1585 unsigned int dsz)
1586 {
1587 struct tipc_portid orig;
1588
1589 orig.ref = ref;
1590 orig.node = tipc_own_addr;
1591 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1592 TIPC_PORT_IMPORTANCE);
1593 }
1594
1595 /**
1596 * tipc_forward2port - forward message sections to port identity
1597 */
1598
1599 int tipc_forward2port(u32 ref,
1600 struct tipc_portid const *dest,
1601 unsigned int num_sect,
1602 struct iovec const *msg_sect,
1603 struct tipc_portid const *orig,
1604 unsigned int importance)
1605 {
1606 struct port *p_ptr;
1607 struct tipc_msg *msg;
1608 int res;
1609
1610 p_ptr = tipc_port_deref(ref);
1611 if (!p_ptr || p_ptr->publ.connected)
1612 return -EINVAL;
1613
1614 msg = &p_ptr->publ.phdr;
1615 msg_set_type(msg, TIPC_DIRECT_MSG);
1616 msg_set_orignode(msg, orig->node);
1617 msg_set_origport(msg, orig->ref);
1618 msg_set_destnode(msg, dest->node);
1619 msg_set_destport(msg, dest->ref);
1620 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1621 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1622 msg_set_importance(msg, importance);
1623 p_ptr->sent++;
1624 if (dest->node == tipc_own_addr)
1625 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1626 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1627 if (likely(res != -ELINKCONG))
1628 return res;
1629 if (port_unreliable(p_ptr)) {
1630 /* Just calculate msg length and return */
1631 return msg_calc_data_size(msg_sect, num_sect);
1632 }
1633 return -ELINKCONG;
1634 }
1635
1636 /**
1637 * tipc_send2port - send message sections to port identity
1638 */
1639
1640 int tipc_send2port(u32 ref,
1641 struct tipc_portid const *dest,
1642 unsigned int num_sect,
1643 struct iovec const *msg_sect)
1644 {
1645 struct tipc_portid orig;
1646
1647 orig.ref = ref;
1648 orig.node = tipc_own_addr;
1649 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1650 TIPC_PORT_IMPORTANCE);
1651 }
1652
1653 /**
1654 * tipc_forward_buf2port - forward message buffer to port identity
1655 */
1656 int tipc_forward_buf2port(u32 ref,
1657 struct tipc_portid const *dest,
1658 struct sk_buff *buf,
1659 unsigned int dsz,
1660 struct tipc_portid const *orig,
1661 unsigned int importance)
1662 {
1663 struct port *p_ptr;
1664 struct tipc_msg *msg;
1665 int res;
1666
1667 p_ptr = (struct port *)tipc_ref_deref(ref);
1668 if (!p_ptr || p_ptr->publ.connected)
1669 return -EINVAL;
1670
1671 msg = &p_ptr->publ.phdr;
1672 msg_set_type(msg, TIPC_DIRECT_MSG);
1673 msg_set_orignode(msg, orig->node);
1674 msg_set_origport(msg, orig->ref);
1675 msg_set_destnode(msg, dest->node);
1676 msg_set_destport(msg, dest->ref);
1677 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1678 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1679 msg_set_importance(msg, importance);
1680 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1681 if (skb_cow(buf, DIR_MSG_H_SIZE))
1682 return -ENOMEM;
1683
1684 skb_push(buf, DIR_MSG_H_SIZE);
1685 skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1686 msg_dbg(msg, "buf2port: ");
1687 p_ptr->sent++;
1688 if (dest->node == tipc_own_addr)
1689 return tipc_port_recv_msg(buf);
1690 res = tipc_send_buf_fast(buf, dest->node);
1691 if (likely(res != -ELINKCONG))
1692 return res;
1693 if (port_unreliable(p_ptr))
1694 return dsz;
1695 return -ELINKCONG;
1696 }
1697
1698 /**
1699 * tipc_send_buf2port - send message buffer to port identity
1700 */
1701
1702 int tipc_send_buf2port(u32 ref,
1703 struct tipc_portid const *dest,
1704 struct sk_buff *buf,
1705 unsigned int dsz)
1706 {
1707 struct tipc_portid orig;
1708
1709 orig.ref = ref;
1710 orig.node = tipc_own_addr;
1711 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1712 TIPC_PORT_IMPORTANCE);
1713 }
1714
kernel source for telekom puls (alcatel/mediatek)