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ACPI: prevent randconfig build failure on empty ACPI_CUSTOM_DSDT_FILE
[pv_ops_mirror.git] / net / tipc / port.c
blobf508614ca59b4125fa77e94728057205bf9f8f57
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 native TIPC port
215 *
216 * Returns local port reference
217 */
218
219 u32 tipc_createport_raw(void *usr_handle,
220 u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
221 void (*wakeup)(struct tipc_port *),
222 const u32 importance)
223 {
224 struct port *p_ptr;
225 struct tipc_msg *msg;
226 u32 ref;
227
228 p_ptr = kzalloc(sizeof(*p_ptr), GFP_ATOMIC);
229 if (!p_ptr) {
230 warn("Port creation failed, no memory\n");
231 return 0;
232 }
233 ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
234 if (!ref) {
235 warn("Port creation failed, reference table exhausted\n");
236 kfree(p_ptr);
237 return 0;
238 }
239
240 tipc_port_lock(ref);
241 p_ptr->publ.usr_handle = usr_handle;
242 p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
243 p_ptr->publ.ref = ref;
244 msg = &p_ptr->publ.phdr;
245 msg_init(msg, DATA_LOW, TIPC_NAMED_MSG, TIPC_OK, LONG_H_SIZE, 0);
246 msg_set_orignode(msg, tipc_own_addr);
247 msg_set_prevnode(msg, tipc_own_addr);
248 msg_set_origport(msg, ref);
249 msg_set_importance(msg,importance);
250 p_ptr->last_in_seqno = 41;
251 p_ptr->sent = 1;
252 INIT_LIST_HEAD(&p_ptr->wait_list);
253 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
254 p_ptr->congested_link = NULL;
255 p_ptr->dispatcher = dispatcher;
256 p_ptr->wakeup = wakeup;
257 p_ptr->user_port = NULL;
258 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
259 spin_lock_bh(&tipc_port_list_lock);
260 INIT_LIST_HEAD(&p_ptr->publications);
261 INIT_LIST_HEAD(&p_ptr->port_list);
262 list_add_tail(&p_ptr->port_list, &ports);
263 spin_unlock_bh(&tipc_port_list_lock);
264 tipc_port_unlock(p_ptr);
265 return ref;
266 }
267
268 int tipc_deleteport(u32 ref)
269 {
270 struct port *p_ptr;
271 struct sk_buff *buf = NULL;
272
273 tipc_withdraw(ref, 0, NULL);
274 p_ptr = tipc_port_lock(ref);
275 if (!p_ptr)
276 return -EINVAL;
277
278 tipc_ref_discard(ref);
279 tipc_port_unlock(p_ptr);
280
281 k_cancel_timer(&p_ptr->timer);
282 if (p_ptr->publ.connected) {
283 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
284 tipc_nodesub_unsubscribe(&p_ptr->subscription);
285 }
286 if (p_ptr->user_port) {
287 tipc_reg_remove_port(p_ptr->user_port);
288 kfree(p_ptr->user_port);
289 }
290
291 spin_lock_bh(&tipc_port_list_lock);
292 list_del(&p_ptr->port_list);
293 list_del(&p_ptr->wait_list);
294 spin_unlock_bh(&tipc_port_list_lock);
295 k_term_timer(&p_ptr->timer);
296 kfree(p_ptr);
297 dbg("Deleted port %u\n", ref);
298 tipc_net_route_msg(buf);
299 return TIPC_OK;
300 }
301
302 /**
303 * tipc_get_port() - return port associated with 'ref'
304 *
305 * Note: Port is not locked.
306 */
307
308 struct tipc_port *tipc_get_port(const u32 ref)
309 {
310 return (struct tipc_port *)tipc_ref_deref(ref);
311 }
312
313 /**
314 * tipc_get_handle - return user handle associated to port 'ref'
315 */
316
317 void *tipc_get_handle(const u32 ref)
318 {
319 struct port *p_ptr;
320 void * handle;
321
322 p_ptr = tipc_port_lock(ref);
323 if (!p_ptr)
324 return NULL;
325 handle = p_ptr->publ.usr_handle;
326 tipc_port_unlock(p_ptr);
327 return handle;
328 }
329
330 static int port_unreliable(struct port *p_ptr)
331 {
332 return msg_src_droppable(&p_ptr->publ.phdr);
333 }
334
335 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
336 {
337 struct port *p_ptr;
338
339 p_ptr = tipc_port_lock(ref);
340 if (!p_ptr)
341 return -EINVAL;
342 *isunreliable = port_unreliable(p_ptr);
343 tipc_port_unlock(p_ptr);
344 return TIPC_OK;
345 }
346
347 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
348 {
349 struct port *p_ptr;
350
351 p_ptr = tipc_port_lock(ref);
352 if (!p_ptr)
353 return -EINVAL;
354 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
355 tipc_port_unlock(p_ptr);
356 return TIPC_OK;
357 }
358
359 static int port_unreturnable(struct port *p_ptr)
360 {
361 return msg_dest_droppable(&p_ptr->publ.phdr);
362 }
363
364 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
365 {
366 struct port *p_ptr;
367
368 p_ptr = tipc_port_lock(ref);
369 if (!p_ptr)
370 return -EINVAL;
371 *isunrejectable = port_unreturnable(p_ptr);
372 tipc_port_unlock(p_ptr);
373 return TIPC_OK;
374 }
375
376 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
377 {
378 struct port *p_ptr;
379
380 p_ptr = tipc_port_lock(ref);
381 if (!p_ptr)
382 return -EINVAL;
383 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
384 tipc_port_unlock(p_ptr);
385 return TIPC_OK;
386 }
387
388 /*
389 * port_build_proto_msg(): build a port level protocol
390 * or a connection abortion message. Called with
391 * tipc_port lock on.
392 */
393 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
394 u32 origport, u32 orignode,
395 u32 usr, u32 type, u32 err,
396 u32 seqno, u32 ack)
397 {
398 struct sk_buff *buf;
399 struct tipc_msg *msg;
400
401 buf = buf_acquire(LONG_H_SIZE);
402 if (buf) {
403 msg = buf_msg(buf);
404 msg_init(msg, usr, type, err, LONG_H_SIZE, destnode);
405 msg_set_destport(msg, destport);
406 msg_set_origport(msg, origport);
407 msg_set_destnode(msg, destnode);
408 msg_set_orignode(msg, orignode);
409 msg_set_transp_seqno(msg, seqno);
410 msg_set_msgcnt(msg, ack);
411 msg_dbg(msg, "PORT>SEND>:");
412 }
413 return buf;
414 }
415
416 int tipc_set_msg_option(struct tipc_port *tp_ptr, const char *opt, const u32 sz)
417 {
418 msg_expand(&tp_ptr->phdr, msg_destnode(&tp_ptr->phdr));
419 msg_set_options(&tp_ptr->phdr, opt, sz);
420 return TIPC_OK;
421 }
422
423 int tipc_reject_msg(struct sk_buff *buf, u32 err)
424 {
425 struct tipc_msg *msg = buf_msg(buf);
426 struct sk_buff *rbuf;
427 struct tipc_msg *rmsg;
428 int hdr_sz;
429 u32 imp = msg_importance(msg);
430 u32 data_sz = msg_data_sz(msg);
431
432 if (data_sz > MAX_REJECT_SIZE)
433 data_sz = MAX_REJECT_SIZE;
434 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
435 imp++;
436 msg_dbg(msg, "port->rej: ");
437
438 /* discard rejected message if it shouldn't be returned to sender */
439 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
440 buf_discard(buf);
441 return data_sz;
442 }
443
444 /* construct rejected message */
445 if (msg_mcast(msg))
446 hdr_sz = MCAST_H_SIZE;
447 else
448 hdr_sz = LONG_H_SIZE;
449 rbuf = buf_acquire(data_sz + hdr_sz);
450 if (rbuf == NULL) {
451 buf_discard(buf);
452 return data_sz;
453 }
454 rmsg = buf_msg(rbuf);
455 msg_init(rmsg, imp, msg_type(msg), err, hdr_sz, msg_orignode(msg));
456 msg_set_destport(rmsg, msg_origport(msg));
457 msg_set_prevnode(rmsg, tipc_own_addr);
458 msg_set_origport(rmsg, msg_destport(msg));
459 if (msg_short(msg))
460 msg_set_orignode(rmsg, tipc_own_addr);
461 else
462 msg_set_orignode(rmsg, msg_destnode(msg));
463 msg_set_size(rmsg, data_sz + hdr_sz);
464 msg_set_nametype(rmsg, msg_nametype(msg));
465 msg_set_nameinst(rmsg, msg_nameinst(msg));
466 skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
467
468 /* send self-abort message when rejecting on a connected port */
469 if (msg_connected(msg)) {
470 struct sk_buff *abuf = NULL;
471 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
472
473 if (p_ptr) {
474 if (p_ptr->publ.connected)
475 abuf = port_build_self_abort_msg(p_ptr, err);
476 tipc_port_unlock(p_ptr);
477 }
478 tipc_net_route_msg(abuf);
479 }
480
481 /* send rejected message */
482 buf_discard(buf);
483 tipc_net_route_msg(rbuf);
484 return data_sz;
485 }
486
487 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
488 struct iovec const *msg_sect, u32 num_sect,
489 int err)
490 {
491 struct sk_buff *buf;
492 int res;
493
494 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
495 !p_ptr->user_port, &buf);
496 if (!buf)
497 return res;
498
499 return tipc_reject_msg(buf, err);
500 }
501
502 static void port_timeout(unsigned long ref)
503 {
504 struct port *p_ptr = tipc_port_lock(ref);
505 struct sk_buff *buf = NULL;
506
507 if (!p_ptr)
508 return;
509
510 if (!p_ptr->publ.connected) {
511 tipc_port_unlock(p_ptr);
512 return;
513 }
514
515 /* Last probe answered ? */
516 if (p_ptr->probing_state == PROBING) {
517 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
518 } else {
519 buf = port_build_proto_msg(port_peerport(p_ptr),
520 port_peernode(p_ptr),
521 p_ptr->publ.ref,
522 tipc_own_addr,
523 CONN_MANAGER,
524 CONN_PROBE,
525 TIPC_OK,
526 port_out_seqno(p_ptr),
527 0);
528 port_incr_out_seqno(p_ptr);
529 p_ptr->probing_state = PROBING;
530 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
531 }
532 tipc_port_unlock(p_ptr);
533 tipc_net_route_msg(buf);
534 }
535
536
537 static void port_handle_node_down(unsigned long ref)
538 {
539 struct port *p_ptr = tipc_port_lock(ref);
540 struct sk_buff* buf = NULL;
541
542 if (!p_ptr)
543 return;
544 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
545 tipc_port_unlock(p_ptr);
546 tipc_net_route_msg(buf);
547 }
548
549
550 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
551 {
552 u32 imp = msg_importance(&p_ptr->publ.phdr);
553
554 if (!p_ptr->publ.connected)
555 return NULL;
556 if (imp < TIPC_CRITICAL_IMPORTANCE)
557 imp++;
558 return port_build_proto_msg(p_ptr->publ.ref,
559 tipc_own_addr,
560 port_peerport(p_ptr),
561 port_peernode(p_ptr),
562 imp,
563 TIPC_CONN_MSG,
564 err,
565 p_ptr->last_in_seqno + 1,
566 0);
567 }
568
569
570 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
571 {
572 u32 imp = msg_importance(&p_ptr->publ.phdr);
573
574 if (!p_ptr->publ.connected)
575 return NULL;
576 if (imp < TIPC_CRITICAL_IMPORTANCE)
577 imp++;
578 return port_build_proto_msg(port_peerport(p_ptr),
579 port_peernode(p_ptr),
580 p_ptr->publ.ref,
581 tipc_own_addr,
582 imp,
583 TIPC_CONN_MSG,
584 err,
585 port_out_seqno(p_ptr),
586 0);
587 }
588
589 void tipc_port_recv_proto_msg(struct sk_buff *buf)
590 {
591 struct tipc_msg *msg = buf_msg(buf);
592 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
593 u32 err = TIPC_OK;
594 struct sk_buff *r_buf = NULL;
595 struct sk_buff *abort_buf = NULL;
596
597 msg_dbg(msg, "PORT<RECV<:");
598
599 if (!p_ptr) {
600 err = TIPC_ERR_NO_PORT;
601 } else if (p_ptr->publ.connected) {
602 if (port_peernode(p_ptr) != msg_orignode(msg))
603 err = TIPC_ERR_NO_PORT;
604 if (port_peerport(p_ptr) != msg_origport(msg))
605 err = TIPC_ERR_NO_PORT;
606 if (!err && msg_routed(msg)) {
607 u32 seqno = msg_transp_seqno(msg);
608 u32 myno = ++p_ptr->last_in_seqno;
609 if (seqno != myno) {
610 err = TIPC_ERR_NO_PORT;
611 abort_buf = port_build_self_abort_msg(p_ptr, err);
612 }
613 }
614 if (msg_type(msg) == CONN_ACK) {
615 int wakeup = tipc_port_congested(p_ptr) &&
616 p_ptr->publ.congested &&
617 p_ptr->wakeup;
618 p_ptr->acked += msg_msgcnt(msg);
619 if (tipc_port_congested(p_ptr))
620 goto exit;
621 p_ptr->publ.congested = 0;
622 if (!wakeup)
623 goto exit;
624 p_ptr->wakeup(&p_ptr->publ);
625 goto exit;
626 }
627 } else if (p_ptr->publ.published) {
628 err = TIPC_ERR_NO_PORT;
629 }
630 if (err) {
631 r_buf = port_build_proto_msg(msg_origport(msg),
632 msg_orignode(msg),
633 msg_destport(msg),
634 tipc_own_addr,
635 DATA_HIGH,
636 TIPC_CONN_MSG,
637 err,
638 0,
639 0);
640 goto exit;
641 }
642
643 /* All is fine */
644 if (msg_type(msg) == CONN_PROBE) {
645 r_buf = port_build_proto_msg(msg_origport(msg),
646 msg_orignode(msg),
647 msg_destport(msg),
648 tipc_own_addr,
649 CONN_MANAGER,
650 CONN_PROBE_REPLY,
651 TIPC_OK,
652 port_out_seqno(p_ptr),
653 0);
654 }
655 p_ptr->probing_state = CONFIRMED;
656 port_incr_out_seqno(p_ptr);
657 exit:
658 if (p_ptr)
659 tipc_port_unlock(p_ptr);
660 tipc_net_route_msg(r_buf);
661 tipc_net_route_msg(abort_buf);
662 buf_discard(buf);
663 }
664
665 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
666 {
667 struct publication *publ;
668
669 if (full_id)
670 tipc_printf(buf, "<%u.%u.%u:%u>:",
671 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
672 tipc_node(tipc_own_addr), p_ptr->publ.ref);
673 else
674 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
675
676 if (p_ptr->publ.connected) {
677 u32 dport = port_peerport(p_ptr);
678 u32 destnode = port_peernode(p_ptr);
679
680 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
681 tipc_zone(destnode), tipc_cluster(destnode),
682 tipc_node(destnode), dport);
683 if (p_ptr->publ.conn_type != 0)
684 tipc_printf(buf, " via {%u,%u}",
685 p_ptr->publ.conn_type,
686 p_ptr->publ.conn_instance);
687 }
688 else if (p_ptr->publ.published) {
689 tipc_printf(buf, " bound to");
690 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
691 if (publ->lower == publ->upper)
692 tipc_printf(buf, " {%u,%u}", publ->type,
693 publ->lower);
694 else
695 tipc_printf(buf, " {%u,%u,%u}", publ->type,
696 publ->lower, publ->upper);
697 }
698 }
699 tipc_printf(buf, "\n");
700 }
701
702 #define MAX_PORT_QUERY 32768
703
704 struct sk_buff *tipc_port_get_ports(void)
705 {
706 struct sk_buff *buf;
707 struct tlv_desc *rep_tlv;
708 struct print_buf pb;
709 struct port *p_ptr;
710 int str_len;
711
712 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
713 if (!buf)
714 return NULL;
715 rep_tlv = (struct tlv_desc *)buf->data;
716
717 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
718 spin_lock_bh(&tipc_port_list_lock);
719 list_for_each_entry(p_ptr, &ports, port_list) {
720 spin_lock_bh(p_ptr->publ.lock);
721 port_print(p_ptr, &pb, 0);
722 spin_unlock_bh(p_ptr->publ.lock);
723 }
724 spin_unlock_bh(&tipc_port_list_lock);
725 str_len = tipc_printbuf_validate(&pb);
726
727 skb_put(buf, TLV_SPACE(str_len));
728 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
729
730 return buf;
731 }
732
733 #if 0
734
735 #define MAX_PORT_STATS 2000
736
737 struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
738 {
739 u32 ref;
740 struct port *p_ptr;
741 struct sk_buff *buf;
742 struct tlv_desc *rep_tlv;
743 struct print_buf pb;
744 int str_len;
745
746 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
747 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
748
749 ref = *(u32 *)TLV_DATA(req_tlv_area);
750 ref = ntohl(ref);
751
752 p_ptr = tipc_port_lock(ref);
753 if (!p_ptr)
754 return cfg_reply_error_string("port not found");
755
756 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
757 if (!buf) {
758 tipc_port_unlock(p_ptr);
759 return NULL;
760 }
761 rep_tlv = (struct tlv_desc *)buf->data;
762
763 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
764 port_print(p_ptr, &pb, 1);
765 /* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
766 tipc_port_unlock(p_ptr);
767 str_len = tipc_printbuf_validate(&pb);
768
769 skb_put(buf, TLV_SPACE(str_len));
770 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
771
772 return buf;
773 }
774
775 #endif
776
777 void tipc_port_reinit(void)
778 {
779 struct port *p_ptr;
780 struct tipc_msg *msg;
781
782 spin_lock_bh(&tipc_port_list_lock);
783 list_for_each_entry(p_ptr, &ports, port_list) {
784 msg = &p_ptr->publ.phdr;
785 if (msg_orignode(msg) == tipc_own_addr)
786 break;
787 msg_set_orignode(msg, tipc_own_addr);
788 }
789 spin_unlock_bh(&tipc_port_list_lock);
790 }
791
792
793 /*
794 * port_dispatcher_sigh(): Signal handler for messages destinated
795 * to the tipc_port interface.
796 */
797
798 static void port_dispatcher_sigh(void *dummy)
799 {
800 struct sk_buff *buf;
801
802 spin_lock_bh(&queue_lock);
803 buf = msg_queue_head;
804 msg_queue_head = NULL;
805 spin_unlock_bh(&queue_lock);
806
807 while (buf) {
808 struct port *p_ptr;
809 struct user_port *up_ptr;
810 struct tipc_portid orig;
811 struct tipc_name_seq dseq;
812 void *usr_handle;
813 int connected;
814 int published;
815 u32 message_type;
816
817 struct sk_buff *next = buf->next;
818 struct tipc_msg *msg = buf_msg(buf);
819 u32 dref = msg_destport(msg);
820
821 message_type = msg_type(msg);
822 if (message_type > TIPC_DIRECT_MSG)
823 goto reject; /* Unsupported message type */
824
825 p_ptr = tipc_port_lock(dref);
826 if (!p_ptr)
827 goto reject; /* Port deleted while msg in queue */
828
829 orig.ref = msg_origport(msg);
830 orig.node = msg_orignode(msg);
831 up_ptr = p_ptr->user_port;
832 usr_handle = up_ptr->usr_handle;
833 connected = p_ptr->publ.connected;
834 published = p_ptr->publ.published;
835
836 if (unlikely(msg_errcode(msg)))
837 goto err;
838
839 switch (message_type) {
840
841 case TIPC_CONN_MSG:{
842 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
843 u32 peer_port = port_peerport(p_ptr);
844 u32 peer_node = port_peernode(p_ptr);
845
846 tipc_port_unlock(p_ptr);
847 if (unlikely(!connected)) {
848 if (unlikely(published))
849 goto reject;
850 tipc_connect2port(dref,&orig);
851 }
852 if (unlikely(msg_origport(msg) != peer_port))
853 goto reject;
854 if (unlikely(msg_orignode(msg) != peer_node))
855 goto reject;
856 if (unlikely(!cb))
857 goto reject;
858 if (unlikely(++p_ptr->publ.conn_unacked >=
859 TIPC_FLOW_CONTROL_WIN))
860 tipc_acknowledge(dref,
861 p_ptr->publ.conn_unacked);
862 skb_pull(buf, msg_hdr_sz(msg));
863 cb(usr_handle, dref, &buf, msg_data(msg),
864 msg_data_sz(msg));
865 break;
866 }
867 case TIPC_DIRECT_MSG:{
868 tipc_msg_event cb = up_ptr->msg_cb;
869
870 tipc_port_unlock(p_ptr);
871 if (unlikely(connected))
872 goto reject;
873 if (unlikely(!cb))
874 goto reject;
875 skb_pull(buf, msg_hdr_sz(msg));
876 cb(usr_handle, dref, &buf, msg_data(msg),
877 msg_data_sz(msg), msg_importance(msg),
878 &orig);
879 break;
880 }
881 case TIPC_MCAST_MSG:
882 case TIPC_NAMED_MSG:{
883 tipc_named_msg_event cb = up_ptr->named_msg_cb;
884
885 tipc_port_unlock(p_ptr);
886 if (unlikely(connected))
887 goto reject;
888 if (unlikely(!cb))
889 goto reject;
890 if (unlikely(!published))
891 goto reject;
892 dseq.type = msg_nametype(msg);
893 dseq.lower = msg_nameinst(msg);
894 dseq.upper = (message_type == TIPC_NAMED_MSG)
895 ? dseq.lower : msg_nameupper(msg);
896 skb_pull(buf, msg_hdr_sz(msg));
897 cb(usr_handle, dref, &buf, msg_data(msg),
898 msg_data_sz(msg), msg_importance(msg),
899 &orig, &dseq);
900 break;
901 }
902 }
903 if (buf)
904 buf_discard(buf);
905 buf = next;
906 continue;
907 err:
908 switch (message_type) {
909
910 case TIPC_CONN_MSG:{
911 tipc_conn_shutdown_event cb =
912 up_ptr->conn_err_cb;
913 u32 peer_port = port_peerport(p_ptr);
914 u32 peer_node = port_peernode(p_ptr);
915
916 tipc_port_unlock(p_ptr);
917 if (!connected || !cb)
918 break;
919 if (msg_origport(msg) != peer_port)
920 break;
921 if (msg_orignode(msg) != peer_node)
922 break;
923 tipc_disconnect(dref);
924 skb_pull(buf, msg_hdr_sz(msg));
925 cb(usr_handle, dref, &buf, msg_data(msg),
926 msg_data_sz(msg), msg_errcode(msg));
927 break;
928 }
929 case TIPC_DIRECT_MSG:{
930 tipc_msg_err_event cb = up_ptr->err_cb;
931
932 tipc_port_unlock(p_ptr);
933 if (connected || !cb)
934 break;
935 skb_pull(buf, msg_hdr_sz(msg));
936 cb(usr_handle, dref, &buf, msg_data(msg),
937 msg_data_sz(msg), msg_errcode(msg), &orig);
938 break;
939 }
940 case TIPC_MCAST_MSG:
941 case TIPC_NAMED_MSG:{
942 tipc_named_msg_err_event cb =
943 up_ptr->named_err_cb;
944
945 tipc_port_unlock(p_ptr);
946 if (connected || !cb)
947 break;
948 dseq.type = msg_nametype(msg);
949 dseq.lower = msg_nameinst(msg);
950 dseq.upper = (message_type == TIPC_NAMED_MSG)
951 ? dseq.lower : msg_nameupper(msg);
952 skb_pull(buf, msg_hdr_sz(msg));
953 cb(usr_handle, dref, &buf, msg_data(msg),
954 msg_data_sz(msg), msg_errcode(msg), &dseq);
955 break;
956 }
957 }
958 if (buf)
959 buf_discard(buf);
960 buf = next;
961 continue;
962 reject:
963 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
964 buf = next;
965 }
966 }
967
968 /*
969 * port_dispatcher(): Dispatcher for messages destinated
970 * to the tipc_port interface. Called with port locked.
971 */
972
973 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
974 {
975 buf->next = NULL;
976 spin_lock_bh(&queue_lock);
977 if (msg_queue_head) {
978 msg_queue_tail->next = buf;
979 msg_queue_tail = buf;
980 } else {
981 msg_queue_tail = msg_queue_head = buf;
982 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
983 }
984 spin_unlock_bh(&queue_lock);
985 return TIPC_OK;
986 }
987
988 /*
989 * Wake up port after congestion: Called with port locked,
990 *
991 */
992
993 static void port_wakeup_sh(unsigned long ref)
994 {
995 struct port *p_ptr;
996 struct user_port *up_ptr;
997 tipc_continue_event cb = NULL;
998 void *uh = NULL;
999
1000 p_ptr = tipc_port_lock(ref);
1001 if (p_ptr) {
1002 up_ptr = p_ptr->user_port;
1003 if (up_ptr) {
1004 cb = up_ptr->continue_event_cb;
1005 uh = up_ptr->usr_handle;
1006 }
1007 tipc_port_unlock(p_ptr);
1008 }
1009 if (cb)
1010 cb(uh, ref);
1011 }
1012
1013
1014 static void port_wakeup(struct tipc_port *p_ptr)
1015 {
1016 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
1017 }
1018
1019 void tipc_acknowledge(u32 ref, u32 ack)
1020 {
1021 struct port *p_ptr;
1022 struct sk_buff *buf = NULL;
1023
1024 p_ptr = tipc_port_lock(ref);
1025 if (!p_ptr)
1026 return;
1027 if (p_ptr->publ.connected) {
1028 p_ptr->publ.conn_unacked -= ack;
1029 buf = port_build_proto_msg(port_peerport(p_ptr),
1030 port_peernode(p_ptr),
1031 ref,
1032 tipc_own_addr,
1033 CONN_MANAGER,
1034 CONN_ACK,
1035 TIPC_OK,
1036 port_out_seqno(p_ptr),
1037 ack);
1038 }
1039 tipc_port_unlock(p_ptr);
1040 tipc_net_route_msg(buf);
1041 }
1042
1043 /*
1044 * tipc_createport(): user level call. Will add port to
1045 * registry if non-zero user_ref.
1046 */
1047
1048 int tipc_createport(u32 user_ref,
1049 void *usr_handle,
1050 unsigned int importance,
1051 tipc_msg_err_event error_cb,
1052 tipc_named_msg_err_event named_error_cb,
1053 tipc_conn_shutdown_event conn_error_cb,
1054 tipc_msg_event msg_cb,
1055 tipc_named_msg_event named_msg_cb,
1056 tipc_conn_msg_event conn_msg_cb,
1057 tipc_continue_event continue_event_cb,/* May be zero */
1058 u32 *portref)
1059 {
1060 struct user_port *up_ptr;
1061 struct port *p_ptr;
1062 u32 ref;
1063
1064 up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
1065 if (!up_ptr) {
1066 warn("Port creation failed, no memory\n");
1067 return -ENOMEM;
1068 }
1069 ref = tipc_createport_raw(NULL, port_dispatcher, port_wakeup, importance);
1070 p_ptr = tipc_port_lock(ref);
1071 if (!p_ptr) {
1072 kfree(up_ptr);
1073 return -ENOMEM;
1074 }
1075
1076 p_ptr->user_port = up_ptr;
1077 up_ptr->user_ref = user_ref;
1078 up_ptr->usr_handle = usr_handle;
1079 up_ptr->ref = p_ptr->publ.ref;
1080 up_ptr->err_cb = error_cb;
1081 up_ptr->named_err_cb = named_error_cb;
1082 up_ptr->conn_err_cb = conn_error_cb;
1083 up_ptr->msg_cb = msg_cb;
1084 up_ptr->named_msg_cb = named_msg_cb;
1085 up_ptr->conn_msg_cb = conn_msg_cb;
1086 up_ptr->continue_event_cb = continue_event_cb;
1087 INIT_LIST_HEAD(&up_ptr->uport_list);
1088 tipc_reg_add_port(up_ptr);
1089 *portref = p_ptr->publ.ref;
1090 dbg(" tipc_createport: %x with ref %u\n", p_ptr, p_ptr->publ.ref);
1091 tipc_port_unlock(p_ptr);
1092 return TIPC_OK;
1093 }
1094
1095 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
1096 {
1097 id->ref = ref;
1098 id->node = tipc_own_addr;
1099 return TIPC_OK;
1100 }
1101
1102 int tipc_portimportance(u32 ref, unsigned int *importance)
1103 {
1104 struct port *p_ptr;
1105
1106 p_ptr = tipc_port_lock(ref);
1107 if (!p_ptr)
1108 return -EINVAL;
1109 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1110 tipc_port_unlock(p_ptr);
1111 return TIPC_OK;
1112 }
1113
1114 int tipc_set_portimportance(u32 ref, unsigned int imp)
1115 {
1116 struct port *p_ptr;
1117
1118 if (imp > TIPC_CRITICAL_IMPORTANCE)
1119 return -EINVAL;
1120
1121 p_ptr = tipc_port_lock(ref);
1122 if (!p_ptr)
1123 return -EINVAL;
1124 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1125 tipc_port_unlock(p_ptr);
1126 return TIPC_OK;
1127 }
1128
1129
1130 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1131 {
1132 struct port *p_ptr;
1133 struct publication *publ;
1134 u32 key;
1135 int res = -EINVAL;
1136
1137 p_ptr = tipc_port_lock(ref);
1138 if (!p_ptr)
1139 return -EINVAL;
1140
1141 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1142 "lower = %u, upper = %u\n",
1143 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1144 if (p_ptr->publ.connected)
1145 goto exit;
1146 if (seq->lower > seq->upper)
1147 goto exit;
1148 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1149 goto exit;
1150 key = ref + p_ptr->pub_count + 1;
1151 if (key == ref) {
1152 res = -EADDRINUSE;
1153 goto exit;
1154 }
1155 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1156 scope, p_ptr->publ.ref, key);
1157 if (publ) {
1158 list_add(&publ->pport_list, &p_ptr->publications);
1159 p_ptr->pub_count++;
1160 p_ptr->publ.published = 1;
1161 res = TIPC_OK;
1162 }
1163 exit:
1164 tipc_port_unlock(p_ptr);
1165 return res;
1166 }
1167
1168 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1169 {
1170 struct port *p_ptr;
1171 struct publication *publ;
1172 struct publication *tpubl;
1173 int res = -EINVAL;
1174
1175 p_ptr = tipc_port_lock(ref);
1176 if (!p_ptr)
1177 return -EINVAL;
1178 if (!seq) {
1179 list_for_each_entry_safe(publ, tpubl,
1180 &p_ptr->publications, pport_list) {
1181 tipc_nametbl_withdraw(publ->type, publ->lower,
1182 publ->ref, publ->key);
1183 }
1184 res = TIPC_OK;
1185 } else {
1186 list_for_each_entry_safe(publ, tpubl,
1187 &p_ptr->publications, pport_list) {
1188 if (publ->scope != scope)
1189 continue;
1190 if (publ->type != seq->type)
1191 continue;
1192 if (publ->lower != seq->lower)
1193 continue;
1194 if (publ->upper != seq->upper)
1195 break;
1196 tipc_nametbl_withdraw(publ->type, publ->lower,
1197 publ->ref, publ->key);
1198 res = TIPC_OK;
1199 break;
1200 }
1201 }
1202 if (list_empty(&p_ptr->publications))
1203 p_ptr->publ.published = 0;
1204 tipc_port_unlock(p_ptr);
1205 return res;
1206 }
1207
1208 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1209 {
1210 struct port *p_ptr;
1211 struct tipc_msg *msg;
1212 int res = -EINVAL;
1213
1214 p_ptr = tipc_port_lock(ref);
1215 if (!p_ptr)
1216 return -EINVAL;
1217 if (p_ptr->publ.published || p_ptr->publ.connected)
1218 goto exit;
1219 if (!peer->ref)
1220 goto exit;
1221
1222 msg = &p_ptr->publ.phdr;
1223 msg_set_destnode(msg, peer->node);
1224 msg_set_destport(msg, peer->ref);
1225 msg_set_orignode(msg, tipc_own_addr);
1226 msg_set_origport(msg, p_ptr->publ.ref);
1227 msg_set_transp_seqno(msg, 42);
1228 msg_set_type(msg, TIPC_CONN_MSG);
1229 if (!may_route(peer->node))
1230 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1231 else
1232 msg_set_hdr_sz(msg, LONG_H_SIZE);
1233
1234 p_ptr->probing_interval = PROBING_INTERVAL;
1235 p_ptr->probing_state = CONFIRMED;
1236 p_ptr->publ.connected = 1;
1237 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1238
1239 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1240 (void *)(unsigned long)ref,
1241 (net_ev_handler)port_handle_node_down);
1242 res = TIPC_OK;
1243 exit:
1244 tipc_port_unlock(p_ptr);
1245 p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1246 return res;
1247 }
1248
1249 /*
1250 * tipc_disconnect(): Disconnect port form peer.
1251 * This is a node local operation.
1252 */
1253
1254 int tipc_disconnect(u32 ref)
1255 {
1256 struct port *p_ptr;
1257 int res = -ENOTCONN;
1258
1259 p_ptr = tipc_port_lock(ref);
1260 if (!p_ptr)
1261 return -EINVAL;
1262 if (p_ptr->publ.connected) {
1263 p_ptr->publ.connected = 0;
1264 /* let timer expire on it's own to avoid deadlock! */
1265 tipc_nodesub_unsubscribe(&p_ptr->subscription);
1266 res = TIPC_OK;
1267 }
1268 tipc_port_unlock(p_ptr);
1269 return res;
1270 }
1271
1272 /*
1273 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1274 */
1275 int tipc_shutdown(u32 ref)
1276 {
1277 struct port *p_ptr;
1278 struct sk_buff *buf = NULL;
1279
1280 p_ptr = tipc_port_lock(ref);
1281 if (!p_ptr)
1282 return -EINVAL;
1283
1284 if (p_ptr->publ.connected) {
1285 u32 imp = msg_importance(&p_ptr->publ.phdr);
1286 if (imp < TIPC_CRITICAL_IMPORTANCE)
1287 imp++;
1288 buf = port_build_proto_msg(port_peerport(p_ptr),
1289 port_peernode(p_ptr),
1290 ref,
1291 tipc_own_addr,
1292 imp,
1293 TIPC_CONN_MSG,
1294 TIPC_CONN_SHUTDOWN,
1295 port_out_seqno(p_ptr),
1296 0);
1297 }
1298 tipc_port_unlock(p_ptr);
1299 tipc_net_route_msg(buf);
1300 return tipc_disconnect(ref);
1301 }
1302
1303 int tipc_isconnected(u32 ref, int *isconnected)
1304 {
1305 struct port *p_ptr;
1306
1307 p_ptr = tipc_port_lock(ref);
1308 if (!p_ptr)
1309 return -EINVAL;
1310 *isconnected = p_ptr->publ.connected;
1311 tipc_port_unlock(p_ptr);
1312 return TIPC_OK;
1313 }
1314
1315 int tipc_peer(u32 ref, struct tipc_portid *peer)
1316 {
1317 struct port *p_ptr;
1318 int res;
1319
1320 p_ptr = tipc_port_lock(ref);
1321 if (!p_ptr)
1322 return -EINVAL;
1323 if (p_ptr->publ.connected) {
1324 peer->ref = port_peerport(p_ptr);
1325 peer->node = port_peernode(p_ptr);
1326 res = TIPC_OK;
1327 } else
1328 res = -ENOTCONN;
1329 tipc_port_unlock(p_ptr);
1330 return res;
1331 }
1332
1333 int tipc_ref_valid(u32 ref)
1334 {
1335 /* Works irrespective of type */
1336 return !!tipc_ref_deref(ref);
1337 }
1338
1339
1340 /*
1341 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1342 * message for this node.
1343 */
1344
1345 int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1346 struct iovec const *msg_sect)
1347 {
1348 struct sk_buff *buf;
1349 int res;
1350
1351 res = msg_build(&sender->publ.phdr, msg_sect, num_sect,
1352 MAX_MSG_SIZE, !sender->user_port, &buf);
1353 if (likely(buf))
1354 tipc_port_recv_msg(buf);
1355 return res;
1356 }
1357
1358 /**
1359 * tipc_send - send message sections on connection
1360 */
1361
1362 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1363 {
1364 struct port *p_ptr;
1365 u32 destnode;
1366 int res;
1367
1368 p_ptr = tipc_port_deref(ref);
1369 if (!p_ptr || !p_ptr->publ.connected)
1370 return -EINVAL;
1371
1372 p_ptr->publ.congested = 1;
1373 if (!tipc_port_congested(p_ptr)) {
1374 destnode = port_peernode(p_ptr);
1375 if (likely(destnode != tipc_own_addr))
1376 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1377 destnode);
1378 else
1379 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1380
1381 if (likely(res != -ELINKCONG)) {
1382 port_incr_out_seqno(p_ptr);
1383 p_ptr->publ.congested = 0;
1384 p_ptr->sent++;
1385 return res;
1386 }
1387 }
1388 if (port_unreliable(p_ptr)) {
1389 p_ptr->publ.congested = 0;
1390 /* Just calculate msg length and return */
1391 return msg_calc_data_size(msg_sect, num_sect);
1392 }
1393 return -ELINKCONG;
1394 }
1395
1396 /**
1397 * tipc_send_buf - send message buffer on connection
1398 */
1399
1400 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1401 {
1402 struct port *p_ptr;
1403 struct tipc_msg *msg;
1404 u32 destnode;
1405 u32 hsz;
1406 u32 sz;
1407 u32 res;
1408
1409 p_ptr = tipc_port_deref(ref);
1410 if (!p_ptr || !p_ptr->publ.connected)
1411 return -EINVAL;
1412
1413 msg = &p_ptr->publ.phdr;
1414 hsz = msg_hdr_sz(msg);
1415 sz = hsz + dsz;
1416 msg_set_size(msg, sz);
1417 if (skb_cow(buf, hsz))
1418 return -ENOMEM;
1419
1420 skb_push(buf, hsz);
1421 skb_copy_to_linear_data(buf, msg, hsz);
1422 destnode = msg_destnode(msg);
1423 p_ptr->publ.congested = 1;
1424 if (!tipc_port_congested(p_ptr)) {
1425 if (likely(destnode != tipc_own_addr))
1426 res = tipc_send_buf_fast(buf, destnode);
1427 else {
1428 tipc_port_recv_msg(buf);
1429 res = sz;
1430 }
1431 if (likely(res != -ELINKCONG)) {
1432 port_incr_out_seqno(p_ptr);
1433 p_ptr->sent++;
1434 p_ptr->publ.congested = 0;
1435 return res;
1436 }
1437 }
1438 if (port_unreliable(p_ptr)) {
1439 p_ptr->publ.congested = 0;
1440 return dsz;
1441 }
1442 return -ELINKCONG;
1443 }
1444
1445 /**
1446 * tipc_forward2name - forward message sections to port name
1447 */
1448
1449 int tipc_forward2name(u32 ref,
1450 struct tipc_name const *name,
1451 u32 domain,
1452 u32 num_sect,
1453 struct iovec const *msg_sect,
1454 struct tipc_portid const *orig,
1455 unsigned int importance)
1456 {
1457 struct port *p_ptr;
1458 struct tipc_msg *msg;
1459 u32 destnode = domain;
1460 u32 destport = 0;
1461 int res;
1462
1463 p_ptr = tipc_port_deref(ref);
1464 if (!p_ptr || p_ptr->publ.connected)
1465 return -EINVAL;
1466
1467 msg = &p_ptr->publ.phdr;
1468 msg_set_type(msg, TIPC_NAMED_MSG);
1469 msg_set_orignode(msg, orig->node);
1470 msg_set_origport(msg, orig->ref);
1471 msg_set_hdr_sz(msg, LONG_H_SIZE);
1472 msg_set_nametype(msg, name->type);
1473 msg_set_nameinst(msg, name->instance);
1474 msg_set_lookup_scope(msg, addr_scope(domain));
1475 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1476 msg_set_importance(msg,importance);
1477 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1478 msg_set_destnode(msg, destnode);
1479 msg_set_destport(msg, destport);
1480
1481 if (likely(destport || destnode)) {
1482 p_ptr->sent++;
1483 if (likely(destnode == tipc_own_addr))
1484 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1485 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1486 destnode);
1487 if (likely(res != -ELINKCONG))
1488 return res;
1489 if (port_unreliable(p_ptr)) {
1490 /* Just calculate msg length and return */
1491 return msg_calc_data_size(msg_sect, num_sect);
1492 }
1493 return -ELINKCONG;
1494 }
1495 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1496 TIPC_ERR_NO_NAME);
1497 }
1498
1499 /**
1500 * tipc_send2name - send message sections to port name
1501 */
1502
1503 int tipc_send2name(u32 ref,
1504 struct tipc_name const *name,
1505 unsigned int domain,
1506 unsigned int num_sect,
1507 struct iovec const *msg_sect)
1508 {
1509 struct tipc_portid orig;
1510
1511 orig.ref = ref;
1512 orig.node = tipc_own_addr;
1513 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1514 TIPC_PORT_IMPORTANCE);
1515 }
1516
1517 /**
1518 * tipc_forward_buf2name - forward message buffer to port name
1519 */
1520
1521 int tipc_forward_buf2name(u32 ref,
1522 struct tipc_name const *name,
1523 u32 domain,
1524 struct sk_buff *buf,
1525 unsigned int dsz,
1526 struct tipc_portid const *orig,
1527 unsigned int importance)
1528 {
1529 struct port *p_ptr;
1530 struct tipc_msg *msg;
1531 u32 destnode = domain;
1532 u32 destport = 0;
1533 int res;
1534
1535 p_ptr = (struct port *)tipc_ref_deref(ref);
1536 if (!p_ptr || p_ptr->publ.connected)
1537 return -EINVAL;
1538
1539 msg = &p_ptr->publ.phdr;
1540 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1541 msg_set_importance(msg, importance);
1542 msg_set_type(msg, TIPC_NAMED_MSG);
1543 msg_set_orignode(msg, orig->node);
1544 msg_set_origport(msg, orig->ref);
1545 msg_set_nametype(msg, name->type);
1546 msg_set_nameinst(msg, name->instance);
1547 msg_set_lookup_scope(msg, addr_scope(domain));
1548 msg_set_hdr_sz(msg, LONG_H_SIZE);
1549 msg_set_size(msg, LONG_H_SIZE + dsz);
1550 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1551 msg_set_destnode(msg, destnode);
1552 msg_set_destport(msg, destport);
1553 msg_dbg(msg, "forw2name ==> ");
1554 if (skb_cow(buf, LONG_H_SIZE))
1555 return -ENOMEM;
1556 skb_push(buf, LONG_H_SIZE);
1557 skb_copy_to_linear_data(buf, msg, LONG_H_SIZE);
1558 msg_dbg(buf_msg(buf),"PREP:");
1559 if (likely(destport || destnode)) {
1560 p_ptr->sent++;
1561 if (destnode == tipc_own_addr)
1562 return tipc_port_recv_msg(buf);
1563 res = tipc_send_buf_fast(buf, destnode);
1564 if (likely(res != -ELINKCONG))
1565 return res;
1566 if (port_unreliable(p_ptr))
1567 return dsz;
1568 return -ELINKCONG;
1569 }
1570 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1571 }
1572
1573 /**
1574 * tipc_send_buf2name - send message buffer to port name
1575 */
1576
1577 int tipc_send_buf2name(u32 ref,
1578 struct tipc_name const *dest,
1579 u32 domain,
1580 struct sk_buff *buf,
1581 unsigned int dsz)
1582 {
1583 struct tipc_portid orig;
1584
1585 orig.ref = ref;
1586 orig.node = tipc_own_addr;
1587 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1588 TIPC_PORT_IMPORTANCE);
1589 }
1590
1591 /**
1592 * tipc_forward2port - forward message sections to port identity
1593 */
1594
1595 int tipc_forward2port(u32 ref,
1596 struct tipc_portid const *dest,
1597 unsigned int num_sect,
1598 struct iovec const *msg_sect,
1599 struct tipc_portid const *orig,
1600 unsigned int importance)
1601 {
1602 struct port *p_ptr;
1603 struct tipc_msg *msg;
1604 int res;
1605
1606 p_ptr = tipc_port_deref(ref);
1607 if (!p_ptr || p_ptr->publ.connected)
1608 return -EINVAL;
1609
1610 msg = &p_ptr->publ.phdr;
1611 msg_set_type(msg, TIPC_DIRECT_MSG);
1612 msg_set_orignode(msg, orig->node);
1613 msg_set_origport(msg, orig->ref);
1614 msg_set_destnode(msg, dest->node);
1615 msg_set_destport(msg, dest->ref);
1616 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1617 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1618 msg_set_importance(msg, importance);
1619 p_ptr->sent++;
1620 if (dest->node == tipc_own_addr)
1621 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1622 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1623 if (likely(res != -ELINKCONG))
1624 return res;
1625 if (port_unreliable(p_ptr)) {
1626 /* Just calculate msg length and return */
1627 return msg_calc_data_size(msg_sect, num_sect);
1628 }
1629 return -ELINKCONG;
1630 }
1631
1632 /**
1633 * tipc_send2port - send message sections to port identity
1634 */
1635
1636 int tipc_send2port(u32 ref,
1637 struct tipc_portid const *dest,
1638 unsigned int num_sect,
1639 struct iovec const *msg_sect)
1640 {
1641 struct tipc_portid orig;
1642
1643 orig.ref = ref;
1644 orig.node = tipc_own_addr;
1645 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1646 TIPC_PORT_IMPORTANCE);
1647 }
1648
1649 /**
1650 * tipc_forward_buf2port - forward message buffer to port identity
1651 */
1652 int tipc_forward_buf2port(u32 ref,
1653 struct tipc_portid const *dest,
1654 struct sk_buff *buf,
1655 unsigned int dsz,
1656 struct tipc_portid const *orig,
1657 unsigned int importance)
1658 {
1659 struct port *p_ptr;
1660 struct tipc_msg *msg;
1661 int res;
1662
1663 p_ptr = (struct port *)tipc_ref_deref(ref);
1664 if (!p_ptr || p_ptr->publ.connected)
1665 return -EINVAL;
1666
1667 msg = &p_ptr->publ.phdr;
1668 msg_set_type(msg, TIPC_DIRECT_MSG);
1669 msg_set_orignode(msg, orig->node);
1670 msg_set_origport(msg, orig->ref);
1671 msg_set_destnode(msg, dest->node);
1672 msg_set_destport(msg, dest->ref);
1673 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1674 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1675 msg_set_importance(msg, importance);
1676 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1677 if (skb_cow(buf, DIR_MSG_H_SIZE))
1678 return -ENOMEM;
1679
1680 skb_push(buf, DIR_MSG_H_SIZE);
1681 skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1682 msg_dbg(msg, "buf2port: ");
1683 p_ptr->sent++;
1684 if (dest->node == tipc_own_addr)
1685 return tipc_port_recv_msg(buf);
1686 res = tipc_send_buf_fast(buf, dest->node);
1687 if (likely(res != -ELINKCONG))
1688 return res;
1689 if (port_unreliable(p_ptr))
1690 return dsz;
1691 return -ELINKCONG;
1692 }
1693
1694 /**
1695 * tipc_send_buf2port - send message buffer to port identity
1696 */
1697
1698 int tipc_send_buf2port(u32 ref,
1699 struct tipc_portid const *dest,
1700 struct sk_buff *buf,
1701 unsigned int dsz)
1702 {
1703 struct tipc_portid orig;
1704
1705 orig.ref = ref;
1706 orig.node = tipc_own_addr;
1707 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1708 TIPC_PORT_IMPORTANCE);
1709 }
1710
Mirror for ia64_pv_ops.git