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fix get_active_super()/umount() race
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / net / tipc / port.c
blob0737680e9266021f528f5addec9ff0acefbec406
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 "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 = tipc_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 pointer to (locked) TIPC port, or NULL if unable to create it
217 */
218
219 struct tipc_port *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 NULL;
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 NULL;
238 }
239
240 p_ptr->publ.usr_handle = usr_handle;
241 p_ptr->publ.max_pkt = MAX_PKT_DEFAULT;
242 p_ptr->publ.ref = ref;
243 msg = &p_ptr->publ.phdr;
244 tipc_msg_init(msg, importance, TIPC_NAMED_MSG, LONG_H_SIZE, 0);
245 msg_set_origport(msg, ref);
246 p_ptr->last_in_seqno = 41;
247 p_ptr->sent = 1;
248 INIT_LIST_HEAD(&p_ptr->wait_list);
249 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
250 p_ptr->dispatcher = dispatcher;
251 p_ptr->wakeup = wakeup;
252 p_ptr->user_port = NULL;
253 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
254 spin_lock_bh(&tipc_port_list_lock);
255 INIT_LIST_HEAD(&p_ptr->publications);
256 INIT_LIST_HEAD(&p_ptr->port_list);
257 list_add_tail(&p_ptr->port_list, &ports);
258 spin_unlock_bh(&tipc_port_list_lock);
259 return &(p_ptr->publ);
260 }
261
262 int tipc_deleteport(u32 ref)
263 {
264 struct port *p_ptr;
265 struct sk_buff *buf = NULL;
266
267 tipc_withdraw(ref, 0, NULL);
268 p_ptr = tipc_port_lock(ref);
269 if (!p_ptr)
270 return -EINVAL;
271
272 tipc_ref_discard(ref);
273 tipc_port_unlock(p_ptr);
274
275 k_cancel_timer(&p_ptr->timer);
276 if (p_ptr->publ.connected) {
277 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
278 tipc_nodesub_unsubscribe(&p_ptr->subscription);
279 }
280 if (p_ptr->user_port) {
281 tipc_reg_remove_port(p_ptr->user_port);
282 kfree(p_ptr->user_port);
283 }
284
285 spin_lock_bh(&tipc_port_list_lock);
286 list_del(&p_ptr->port_list);
287 list_del(&p_ptr->wait_list);
288 spin_unlock_bh(&tipc_port_list_lock);
289 k_term_timer(&p_ptr->timer);
290 kfree(p_ptr);
291 dbg("Deleted port %u\n", ref);
292 tipc_net_route_msg(buf);
293 return 0;
294 }
295
296 /**
297 * tipc_get_port() - return port associated with 'ref'
298 *
299 * Note: Port is not locked.
300 */
301
302 struct tipc_port *tipc_get_port(const u32 ref)
303 {
304 return (struct tipc_port *)tipc_ref_deref(ref);
305 }
306
307 /**
308 * tipc_get_handle - return user handle associated to port 'ref'
309 */
310
311 void *tipc_get_handle(const u32 ref)
312 {
313 struct port *p_ptr;
314 void * handle;
315
316 p_ptr = tipc_port_lock(ref);
317 if (!p_ptr)
318 return NULL;
319 handle = p_ptr->publ.usr_handle;
320 tipc_port_unlock(p_ptr);
321 return handle;
322 }
323
324 static int port_unreliable(struct port *p_ptr)
325 {
326 return msg_src_droppable(&p_ptr->publ.phdr);
327 }
328
329 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
330 {
331 struct port *p_ptr;
332
333 p_ptr = tipc_port_lock(ref);
334 if (!p_ptr)
335 return -EINVAL;
336 *isunreliable = port_unreliable(p_ptr);
337 tipc_port_unlock(p_ptr);
338 return 0;
339 }
340
341 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
342 {
343 struct port *p_ptr;
344
345 p_ptr = tipc_port_lock(ref);
346 if (!p_ptr)
347 return -EINVAL;
348 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
349 tipc_port_unlock(p_ptr);
350 return 0;
351 }
352
353 static int port_unreturnable(struct port *p_ptr)
354 {
355 return msg_dest_droppable(&p_ptr->publ.phdr);
356 }
357
358 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
359 {
360 struct port *p_ptr;
361
362 p_ptr = tipc_port_lock(ref);
363 if (!p_ptr)
364 return -EINVAL;
365 *isunrejectable = port_unreturnable(p_ptr);
366 tipc_port_unlock(p_ptr);
367 return 0;
368 }
369
370 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
371 {
372 struct port *p_ptr;
373
374 p_ptr = tipc_port_lock(ref);
375 if (!p_ptr)
376 return -EINVAL;
377 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
378 tipc_port_unlock(p_ptr);
379 return 0;
380 }
381
382 /*
383 * port_build_proto_msg(): build a port level protocol
384 * or a connection abortion message. Called with
385 * tipc_port lock on.
386 */
387 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
388 u32 origport, u32 orignode,
389 u32 usr, u32 type, u32 err,
390 u32 seqno, u32 ack)
391 {
392 struct sk_buff *buf;
393 struct tipc_msg *msg;
394
395 buf = buf_acquire(LONG_H_SIZE);
396 if (buf) {
397 msg = buf_msg(buf);
398 tipc_msg_init(msg, usr, type, LONG_H_SIZE, destnode);
399 msg_set_errcode(msg, err);
400 msg_set_destport(msg, destport);
401 msg_set_origport(msg, origport);
402 msg_set_orignode(msg, orignode);
403 msg_set_transp_seqno(msg, seqno);
404 msg_set_msgcnt(msg, ack);
405 msg_dbg(msg, "PORT>SEND>:");
406 }
407 return buf;
408 }
409
410 int tipc_reject_msg(struct sk_buff *buf, u32 err)
411 {
412 struct tipc_msg *msg = buf_msg(buf);
413 struct sk_buff *rbuf;
414 struct tipc_msg *rmsg;
415 int hdr_sz;
416 u32 imp = msg_importance(msg);
417 u32 data_sz = msg_data_sz(msg);
418
419 if (data_sz > MAX_REJECT_SIZE)
420 data_sz = MAX_REJECT_SIZE;
421 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
422 imp++;
423 msg_dbg(msg, "port->rej: ");
424
425 /* discard rejected message if it shouldn't be returned to sender */
426 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
427 buf_discard(buf);
428 return data_sz;
429 }
430
431 /* construct rejected message */
432 if (msg_mcast(msg))
433 hdr_sz = MCAST_H_SIZE;
434 else
435 hdr_sz = LONG_H_SIZE;
436 rbuf = buf_acquire(data_sz + hdr_sz);
437 if (rbuf == NULL) {
438 buf_discard(buf);
439 return data_sz;
440 }
441 rmsg = buf_msg(rbuf);
442 tipc_msg_init(rmsg, imp, msg_type(msg), hdr_sz, msg_orignode(msg));
443 msg_set_errcode(rmsg, err);
444 msg_set_destport(rmsg, msg_origport(msg));
445 msg_set_origport(rmsg, msg_destport(msg));
446 if (msg_short(msg)) {
447 msg_set_orignode(rmsg, tipc_own_addr);
448 /* leave name type & instance as zeroes */
449 } else {
450 msg_set_orignode(rmsg, msg_destnode(msg));
451 msg_set_nametype(rmsg, msg_nametype(msg));
452 msg_set_nameinst(rmsg, msg_nameinst(msg));
453 }
454 msg_set_size(rmsg, data_sz + hdr_sz);
455 skb_copy_to_linear_data_offset(rbuf, hdr_sz, msg_data(msg), data_sz);
456
457 /* send self-abort message when rejecting on a connected port */
458 if (msg_connected(msg)) {
459 struct sk_buff *abuf = NULL;
460 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
461
462 if (p_ptr) {
463 if (p_ptr->publ.connected)
464 abuf = port_build_self_abort_msg(p_ptr, err);
465 tipc_port_unlock(p_ptr);
466 }
467 tipc_net_route_msg(abuf);
468 }
469
470 /* send rejected message */
471 buf_discard(buf);
472 tipc_net_route_msg(rbuf);
473 return data_sz;
474 }
475
476 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
477 struct iovec const *msg_sect, u32 num_sect,
478 int err)
479 {
480 struct sk_buff *buf;
481 int res;
482
483 res = tipc_msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
484 !p_ptr->user_port, &buf);
485 if (!buf)
486 return res;
487
488 return tipc_reject_msg(buf, err);
489 }
490
491 static void port_timeout(unsigned long ref)
492 {
493 struct port *p_ptr = tipc_port_lock(ref);
494 struct sk_buff *buf = NULL;
495
496 if (!p_ptr)
497 return;
498
499 if (!p_ptr->publ.connected) {
500 tipc_port_unlock(p_ptr);
501 return;
502 }
503
504 /* Last probe answered ? */
505 if (p_ptr->probing_state == PROBING) {
506 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
507 } else {
508 buf = port_build_proto_msg(port_peerport(p_ptr),
509 port_peernode(p_ptr),
510 p_ptr->publ.ref,
511 tipc_own_addr,
512 CONN_MANAGER,
513 CONN_PROBE,
514 TIPC_OK,
515 port_out_seqno(p_ptr),
516 0);
517 port_incr_out_seqno(p_ptr);
518 p_ptr->probing_state = PROBING;
519 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
520 }
521 tipc_port_unlock(p_ptr);
522 tipc_net_route_msg(buf);
523 }
524
525
526 static void port_handle_node_down(unsigned long ref)
527 {
528 struct port *p_ptr = tipc_port_lock(ref);
529 struct sk_buff* buf = NULL;
530
531 if (!p_ptr)
532 return;
533 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
534 tipc_port_unlock(p_ptr);
535 tipc_net_route_msg(buf);
536 }
537
538
539 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
540 {
541 u32 imp = msg_importance(&p_ptr->publ.phdr);
542
543 if (!p_ptr->publ.connected)
544 return NULL;
545 if (imp < TIPC_CRITICAL_IMPORTANCE)
546 imp++;
547 return port_build_proto_msg(p_ptr->publ.ref,
548 tipc_own_addr,
549 port_peerport(p_ptr),
550 port_peernode(p_ptr),
551 imp,
552 TIPC_CONN_MSG,
553 err,
554 p_ptr->last_in_seqno + 1,
555 0);
556 }
557
558
559 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
560 {
561 u32 imp = msg_importance(&p_ptr->publ.phdr);
562
563 if (!p_ptr->publ.connected)
564 return NULL;
565 if (imp < TIPC_CRITICAL_IMPORTANCE)
566 imp++;
567 return port_build_proto_msg(port_peerport(p_ptr),
568 port_peernode(p_ptr),
569 p_ptr->publ.ref,
570 tipc_own_addr,
571 imp,
572 TIPC_CONN_MSG,
573 err,
574 port_out_seqno(p_ptr),
575 0);
576 }
577
578 void tipc_port_recv_proto_msg(struct sk_buff *buf)
579 {
580 struct tipc_msg *msg = buf_msg(buf);
581 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
582 u32 err = TIPC_OK;
583 struct sk_buff *r_buf = NULL;
584 struct sk_buff *abort_buf = NULL;
585
586 msg_dbg(msg, "PORT<RECV<:");
587
588 if (!p_ptr) {
589 err = TIPC_ERR_NO_PORT;
590 } else if (p_ptr->publ.connected) {
591 if (port_peernode(p_ptr) != msg_orignode(msg))
592 err = TIPC_ERR_NO_PORT;
593 if (port_peerport(p_ptr) != msg_origport(msg))
594 err = TIPC_ERR_NO_PORT;
595 if (!err && msg_routed(msg)) {
596 u32 seqno = msg_transp_seqno(msg);
597 u32 myno = ++p_ptr->last_in_seqno;
598 if (seqno != myno) {
599 err = TIPC_ERR_NO_PORT;
600 abort_buf = port_build_self_abort_msg(p_ptr, err);
601 }
602 }
603 if (msg_type(msg) == CONN_ACK) {
604 int wakeup = tipc_port_congested(p_ptr) &&
605 p_ptr->publ.congested &&
606 p_ptr->wakeup;
607 p_ptr->acked += msg_msgcnt(msg);
608 if (tipc_port_congested(p_ptr))
609 goto exit;
610 p_ptr->publ.congested = 0;
611 if (!wakeup)
612 goto exit;
613 p_ptr->wakeup(&p_ptr->publ);
614 goto exit;
615 }
616 } else if (p_ptr->publ.published) {
617 err = TIPC_ERR_NO_PORT;
618 }
619 if (err) {
620 r_buf = port_build_proto_msg(msg_origport(msg),
621 msg_orignode(msg),
622 msg_destport(msg),
623 tipc_own_addr,
624 TIPC_HIGH_IMPORTANCE,
625 TIPC_CONN_MSG,
626 err,
627 0,
628 0);
629 goto exit;
630 }
631
632 /* All is fine */
633 if (msg_type(msg) == CONN_PROBE) {
634 r_buf = port_build_proto_msg(msg_origport(msg),
635 msg_orignode(msg),
636 msg_destport(msg),
637 tipc_own_addr,
638 CONN_MANAGER,
639 CONN_PROBE_REPLY,
640 TIPC_OK,
641 port_out_seqno(p_ptr),
642 0);
643 }
644 p_ptr->probing_state = CONFIRMED;
645 port_incr_out_seqno(p_ptr);
646 exit:
647 if (p_ptr)
648 tipc_port_unlock(p_ptr);
649 tipc_net_route_msg(r_buf);
650 tipc_net_route_msg(abort_buf);
651 buf_discard(buf);
652 }
653
654 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
655 {
656 struct publication *publ;
657
658 if (full_id)
659 tipc_printf(buf, "<%u.%u.%u:%u>:",
660 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
661 tipc_node(tipc_own_addr), p_ptr->publ.ref);
662 else
663 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
664
665 if (p_ptr->publ.connected) {
666 u32 dport = port_peerport(p_ptr);
667 u32 destnode = port_peernode(p_ptr);
668
669 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
670 tipc_zone(destnode), tipc_cluster(destnode),
671 tipc_node(destnode), dport);
672 if (p_ptr->publ.conn_type != 0)
673 tipc_printf(buf, " via {%u,%u}",
674 p_ptr->publ.conn_type,
675 p_ptr->publ.conn_instance);
676 }
677 else if (p_ptr->publ.published) {
678 tipc_printf(buf, " bound to");
679 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
680 if (publ->lower == publ->upper)
681 tipc_printf(buf, " {%u,%u}", publ->type,
682 publ->lower);
683 else
684 tipc_printf(buf, " {%u,%u,%u}", publ->type,
685 publ->lower, publ->upper);
686 }
687 }
688 tipc_printf(buf, "\n");
689 }
690
691 #define MAX_PORT_QUERY 32768
692
693 struct sk_buff *tipc_port_get_ports(void)
694 {
695 struct sk_buff *buf;
696 struct tlv_desc *rep_tlv;
697 struct print_buf pb;
698 struct port *p_ptr;
699 int str_len;
700
701 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
702 if (!buf)
703 return NULL;
704 rep_tlv = (struct tlv_desc *)buf->data;
705
706 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
707 spin_lock_bh(&tipc_port_list_lock);
708 list_for_each_entry(p_ptr, &ports, port_list) {
709 spin_lock_bh(p_ptr->publ.lock);
710 port_print(p_ptr, &pb, 0);
711 spin_unlock_bh(p_ptr->publ.lock);
712 }
713 spin_unlock_bh(&tipc_port_list_lock);
714 str_len = tipc_printbuf_validate(&pb);
715
716 skb_put(buf, TLV_SPACE(str_len));
717 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
718
719 return buf;
720 }
721
722 #if 0
723
724 #define MAX_PORT_STATS 2000
725
726 struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
727 {
728 u32 ref;
729 struct port *p_ptr;
730 struct sk_buff *buf;
731 struct tlv_desc *rep_tlv;
732 struct print_buf pb;
733 int str_len;
734
735 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
736 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
737
738 ref = *(u32 *)TLV_DATA(req_tlv_area);
739 ref = ntohl(ref);
740
741 p_ptr = tipc_port_lock(ref);
742 if (!p_ptr)
743 return cfg_reply_error_string("port not found");
744
745 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
746 if (!buf) {
747 tipc_port_unlock(p_ptr);
748 return NULL;
749 }
750 rep_tlv = (struct tlv_desc *)buf->data;
751
752 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
753 port_print(p_ptr, &pb, 1);
754 /* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
755 tipc_port_unlock(p_ptr);
756 str_len = tipc_printbuf_validate(&pb);
757
758 skb_put(buf, TLV_SPACE(str_len));
759 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
760
761 return buf;
762 }
763
764 #endif
765
766 void tipc_port_reinit(void)
767 {
768 struct port *p_ptr;
769 struct tipc_msg *msg;
770
771 spin_lock_bh(&tipc_port_list_lock);
772 list_for_each_entry(p_ptr, &ports, port_list) {
773 msg = &p_ptr->publ.phdr;
774 if (msg_orignode(msg) == tipc_own_addr)
775 break;
776 msg_set_prevnode(msg, tipc_own_addr);
777 msg_set_orignode(msg, tipc_own_addr);
778 }
779 spin_unlock_bh(&tipc_port_list_lock);
780 }
781
782
783 /*
784 * port_dispatcher_sigh(): Signal handler for messages destinated
785 * to the tipc_port interface.
786 */
787
788 static void port_dispatcher_sigh(void *dummy)
789 {
790 struct sk_buff *buf;
791
792 spin_lock_bh(&queue_lock);
793 buf = msg_queue_head;
794 msg_queue_head = NULL;
795 spin_unlock_bh(&queue_lock);
796
797 while (buf) {
798 struct port *p_ptr;
799 struct user_port *up_ptr;
800 struct tipc_portid orig;
801 struct tipc_name_seq dseq;
802 void *usr_handle;
803 int connected;
804 int published;
805 u32 message_type;
806
807 struct sk_buff *next = buf->next;
808 struct tipc_msg *msg = buf_msg(buf);
809 u32 dref = msg_destport(msg);
810
811 message_type = msg_type(msg);
812 if (message_type > TIPC_DIRECT_MSG)
813 goto reject; /* Unsupported message type */
814
815 p_ptr = tipc_port_lock(dref);
816 if (!p_ptr)
817 goto reject; /* Port deleted while msg in queue */
818
819 orig.ref = msg_origport(msg);
820 orig.node = msg_orignode(msg);
821 up_ptr = p_ptr->user_port;
822 usr_handle = up_ptr->usr_handle;
823 connected = p_ptr->publ.connected;
824 published = p_ptr->publ.published;
825
826 if (unlikely(msg_errcode(msg)))
827 goto err;
828
829 switch (message_type) {
830
831 case TIPC_CONN_MSG:{
832 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
833 u32 peer_port = port_peerport(p_ptr);
834 u32 peer_node = port_peernode(p_ptr);
835
836 tipc_port_unlock(p_ptr);
837 if (unlikely(!cb))
838 goto reject;
839 if (unlikely(!connected)) {
840 if (tipc_connect2port(dref, &orig))
841 goto reject;
842 } else if ((msg_origport(msg) != peer_port) ||
843 (msg_orignode(msg) != peer_node))
844 goto reject;
845 if (unlikely(++p_ptr->publ.conn_unacked >=
846 TIPC_FLOW_CONTROL_WIN))
847 tipc_acknowledge(dref,
848 p_ptr->publ.conn_unacked);
849 skb_pull(buf, msg_hdr_sz(msg));
850 cb(usr_handle, dref, &buf, msg_data(msg),
851 msg_data_sz(msg));
852 break;
853 }
854 case TIPC_DIRECT_MSG:{
855 tipc_msg_event cb = up_ptr->msg_cb;
856
857 tipc_port_unlock(p_ptr);
858 if (unlikely(!cb || connected))
859 goto reject;
860 skb_pull(buf, msg_hdr_sz(msg));
861 cb(usr_handle, dref, &buf, msg_data(msg),
862 msg_data_sz(msg), msg_importance(msg),
863 &orig);
864 break;
865 }
866 case TIPC_MCAST_MSG:
867 case TIPC_NAMED_MSG:{
868 tipc_named_msg_event cb = up_ptr->named_msg_cb;
869
870 tipc_port_unlock(p_ptr);
871 if (unlikely(!cb || connected || !published))
872 goto reject;
873 dseq.type = msg_nametype(msg);
874 dseq.lower = msg_nameinst(msg);
875 dseq.upper = (message_type == TIPC_NAMED_MSG)
876 ? dseq.lower : msg_nameupper(msg);
877 skb_pull(buf, msg_hdr_sz(msg));
878 cb(usr_handle, dref, &buf, msg_data(msg),
879 msg_data_sz(msg), msg_importance(msg),
880 &orig, &dseq);
881 break;
882 }
883 }
884 if (buf)
885 buf_discard(buf);
886 buf = next;
887 continue;
888 err:
889 switch (message_type) {
890
891 case TIPC_CONN_MSG:{
892 tipc_conn_shutdown_event cb =
893 up_ptr->conn_err_cb;
894 u32 peer_port = port_peerport(p_ptr);
895 u32 peer_node = port_peernode(p_ptr);
896
897 tipc_port_unlock(p_ptr);
898 if (!cb || !connected)
899 break;
900 if ((msg_origport(msg) != peer_port) ||
901 (msg_orignode(msg) != peer_node))
902 break;
903 tipc_disconnect(dref);
904 skb_pull(buf, msg_hdr_sz(msg));
905 cb(usr_handle, dref, &buf, msg_data(msg),
906 msg_data_sz(msg), msg_errcode(msg));
907 break;
908 }
909 case TIPC_DIRECT_MSG:{
910 tipc_msg_err_event cb = up_ptr->err_cb;
911
912 tipc_port_unlock(p_ptr);
913 if (!cb || connected)
914 break;
915 skb_pull(buf, msg_hdr_sz(msg));
916 cb(usr_handle, dref, &buf, msg_data(msg),
917 msg_data_sz(msg), msg_errcode(msg), &orig);
918 break;
919 }
920 case TIPC_MCAST_MSG:
921 case TIPC_NAMED_MSG:{
922 tipc_named_msg_err_event cb =
923 up_ptr->named_err_cb;
924
925 tipc_port_unlock(p_ptr);
926 if (!cb || connected)
927 break;
928 dseq.type = msg_nametype(msg);
929 dseq.lower = msg_nameinst(msg);
930 dseq.upper = (message_type == TIPC_NAMED_MSG)
931 ? dseq.lower : msg_nameupper(msg);
932 skb_pull(buf, msg_hdr_sz(msg));
933 cb(usr_handle, dref, &buf, msg_data(msg),
934 msg_data_sz(msg), msg_errcode(msg), &dseq);
935 break;
936 }
937 }
938 if (buf)
939 buf_discard(buf);
940 buf = next;
941 continue;
942 reject:
943 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
944 buf = next;
945 }
946 }
947
948 /*
949 * port_dispatcher(): Dispatcher for messages destinated
950 * to the tipc_port interface. Called with port locked.
951 */
952
953 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
954 {
955 buf->next = NULL;
956 spin_lock_bh(&queue_lock);
957 if (msg_queue_head) {
958 msg_queue_tail->next = buf;
959 msg_queue_tail = buf;
960 } else {
961 msg_queue_tail = msg_queue_head = buf;
962 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
963 }
964 spin_unlock_bh(&queue_lock);
965 return 0;
966 }
967
968 /*
969 * Wake up port after congestion: Called with port locked,
970 *
971 */
972
973 static void port_wakeup_sh(unsigned long ref)
974 {
975 struct port *p_ptr;
976 struct user_port *up_ptr;
977 tipc_continue_event cb = NULL;
978 void *uh = NULL;
979
980 p_ptr = tipc_port_lock(ref);
981 if (p_ptr) {
982 up_ptr = p_ptr->user_port;
983 if (up_ptr) {
984 cb = up_ptr->continue_event_cb;
985 uh = up_ptr->usr_handle;
986 }
987 tipc_port_unlock(p_ptr);
988 }
989 if (cb)
990 cb(uh, ref);
991 }
992
993
994 static void port_wakeup(struct tipc_port *p_ptr)
995 {
996 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
997 }
998
999 void tipc_acknowledge(u32 ref, u32 ack)
1000 {
1001 struct port *p_ptr;
1002 struct sk_buff *buf = NULL;
1003
1004 p_ptr = tipc_port_lock(ref);
1005 if (!p_ptr)
1006 return;
1007 if (p_ptr->publ.connected) {
1008 p_ptr->publ.conn_unacked -= ack;
1009 buf = port_build_proto_msg(port_peerport(p_ptr),
1010 port_peernode(p_ptr),
1011 ref,
1012 tipc_own_addr,
1013 CONN_MANAGER,
1014 CONN_ACK,
1015 TIPC_OK,
1016 port_out_seqno(p_ptr),
1017 ack);
1018 }
1019 tipc_port_unlock(p_ptr);
1020 tipc_net_route_msg(buf);
1021 }
1022
1023 /*
1024 * tipc_createport(): user level call. Will add port to
1025 * registry if non-zero user_ref.
1026 */
1027
1028 int tipc_createport(u32 user_ref,
1029 void *usr_handle,
1030 unsigned int importance,
1031 tipc_msg_err_event error_cb,
1032 tipc_named_msg_err_event named_error_cb,
1033 tipc_conn_shutdown_event conn_error_cb,
1034 tipc_msg_event msg_cb,
1035 tipc_named_msg_event named_msg_cb,
1036 tipc_conn_msg_event conn_msg_cb,
1037 tipc_continue_event continue_event_cb,/* May be zero */
1038 u32 *portref)
1039 {
1040 struct user_port *up_ptr;
1041 struct port *p_ptr;
1042
1043 up_ptr = kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
1044 if (!up_ptr) {
1045 warn("Port creation failed, no memory\n");
1046 return -ENOMEM;
1047 }
1048 p_ptr = (struct port *)tipc_createport_raw(NULL, port_dispatcher,
1049 port_wakeup, importance);
1050 if (!p_ptr) {
1051 kfree(up_ptr);
1052 return -ENOMEM;
1053 }
1054
1055 p_ptr->user_port = up_ptr;
1056 up_ptr->user_ref = user_ref;
1057 up_ptr->usr_handle = usr_handle;
1058 up_ptr->ref = p_ptr->publ.ref;
1059 up_ptr->err_cb = error_cb;
1060 up_ptr->named_err_cb = named_error_cb;
1061 up_ptr->conn_err_cb = conn_error_cb;
1062 up_ptr->msg_cb = msg_cb;
1063 up_ptr->named_msg_cb = named_msg_cb;
1064 up_ptr->conn_msg_cb = conn_msg_cb;
1065 up_ptr->continue_event_cb = continue_event_cb;
1066 INIT_LIST_HEAD(&up_ptr->uport_list);
1067 tipc_reg_add_port(up_ptr);
1068 *portref = p_ptr->publ.ref;
1069 tipc_port_unlock(p_ptr);
1070 return 0;
1071 }
1072
1073 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
1074 {
1075 id->ref = ref;
1076 id->node = tipc_own_addr;
1077 return 0;
1078 }
1079
1080 int tipc_portimportance(u32 ref, unsigned int *importance)
1081 {
1082 struct port *p_ptr;
1083
1084 p_ptr = tipc_port_lock(ref);
1085 if (!p_ptr)
1086 return -EINVAL;
1087 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1088 tipc_port_unlock(p_ptr);
1089 return 0;
1090 }
1091
1092 int tipc_set_portimportance(u32 ref, unsigned int imp)
1093 {
1094 struct port *p_ptr;
1095
1096 if (imp > TIPC_CRITICAL_IMPORTANCE)
1097 return -EINVAL;
1098
1099 p_ptr = tipc_port_lock(ref);
1100 if (!p_ptr)
1101 return -EINVAL;
1102 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1103 tipc_port_unlock(p_ptr);
1104 return 0;
1105 }
1106
1107
1108 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1109 {
1110 struct port *p_ptr;
1111 struct publication *publ;
1112 u32 key;
1113 int res = -EINVAL;
1114
1115 p_ptr = tipc_port_lock(ref);
1116 if (!p_ptr)
1117 return -EINVAL;
1118
1119 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1120 "lower = %u, upper = %u\n",
1121 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1122 if (p_ptr->publ.connected)
1123 goto exit;
1124 if (seq->lower > seq->upper)
1125 goto exit;
1126 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1127 goto exit;
1128 key = ref + p_ptr->pub_count + 1;
1129 if (key == ref) {
1130 res = -EADDRINUSE;
1131 goto exit;
1132 }
1133 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1134 scope, p_ptr->publ.ref, key);
1135 if (publ) {
1136 list_add(&publ->pport_list, &p_ptr->publications);
1137 p_ptr->pub_count++;
1138 p_ptr->publ.published = 1;
1139 res = 0;
1140 }
1141 exit:
1142 tipc_port_unlock(p_ptr);
1143 return res;
1144 }
1145
1146 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1147 {
1148 struct port *p_ptr;
1149 struct publication *publ;
1150 struct publication *tpubl;
1151 int res = -EINVAL;
1152
1153 p_ptr = tipc_port_lock(ref);
1154 if (!p_ptr)
1155 return -EINVAL;
1156 if (!seq) {
1157 list_for_each_entry_safe(publ, tpubl,
1158 &p_ptr->publications, pport_list) {
1159 tipc_nametbl_withdraw(publ->type, publ->lower,
1160 publ->ref, publ->key);
1161 }
1162 res = 0;
1163 } else {
1164 list_for_each_entry_safe(publ, tpubl,
1165 &p_ptr->publications, pport_list) {
1166 if (publ->scope != scope)
1167 continue;
1168 if (publ->type != seq->type)
1169 continue;
1170 if (publ->lower != seq->lower)
1171 continue;
1172 if (publ->upper != seq->upper)
1173 break;
1174 tipc_nametbl_withdraw(publ->type, publ->lower,
1175 publ->ref, publ->key);
1176 res = 0;
1177 break;
1178 }
1179 }
1180 if (list_empty(&p_ptr->publications))
1181 p_ptr->publ.published = 0;
1182 tipc_port_unlock(p_ptr);
1183 return res;
1184 }
1185
1186 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1187 {
1188 struct port *p_ptr;
1189 struct tipc_msg *msg;
1190 int res = -EINVAL;
1191
1192 p_ptr = tipc_port_lock(ref);
1193 if (!p_ptr)
1194 return -EINVAL;
1195 if (p_ptr->publ.published || p_ptr->publ.connected)
1196 goto exit;
1197 if (!peer->ref)
1198 goto exit;
1199
1200 msg = &p_ptr->publ.phdr;
1201 msg_set_destnode(msg, peer->node);
1202 msg_set_destport(msg, peer->ref);
1203 msg_set_orignode(msg, tipc_own_addr);
1204 msg_set_origport(msg, p_ptr->publ.ref);
1205 msg_set_transp_seqno(msg, 42);
1206 msg_set_type(msg, TIPC_CONN_MSG);
1207 if (!may_route(peer->node))
1208 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1209 else
1210 msg_set_hdr_sz(msg, LONG_H_SIZE);
1211
1212 p_ptr->probing_interval = PROBING_INTERVAL;
1213 p_ptr->probing_state = CONFIRMED;
1214 p_ptr->publ.connected = 1;
1215 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1216
1217 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1218 (void *)(unsigned long)ref,
1219 (net_ev_handler)port_handle_node_down);
1220 res = 0;
1221 exit:
1222 tipc_port_unlock(p_ptr);
1223 p_ptr->publ.max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1224 return res;
1225 }
1226
1227 /**
1228 * tipc_disconnect_port - disconnect port from peer
1229 *
1230 * Port must be locked.
1231 */
1232
1233 int tipc_disconnect_port(struct tipc_port *tp_ptr)
1234 {
1235 int res;
1236
1237 if (tp_ptr->connected) {
1238 tp_ptr->connected = 0;
1239 /* let timer expire on it's own to avoid deadlock! */
1240 tipc_nodesub_unsubscribe(
1241 &((struct port *)tp_ptr)->subscription);
1242 res = 0;
1243 } else {
1244 res = -ENOTCONN;
1245 }
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;
1258
1259 p_ptr = tipc_port_lock(ref);
1260 if (!p_ptr)
1261 return -EINVAL;
1262 res = tipc_disconnect_port((struct tipc_port *)p_ptr);
1263 tipc_port_unlock(p_ptr);
1264 return res;
1265 }
1266
1267 /*
1268 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1269 */
1270 int tipc_shutdown(u32 ref)
1271 {
1272 struct port *p_ptr;
1273 struct sk_buff *buf = NULL;
1274
1275 p_ptr = tipc_port_lock(ref);
1276 if (!p_ptr)
1277 return -EINVAL;
1278
1279 if (p_ptr->publ.connected) {
1280 u32 imp = msg_importance(&p_ptr->publ.phdr);
1281 if (imp < TIPC_CRITICAL_IMPORTANCE)
1282 imp++;
1283 buf = port_build_proto_msg(port_peerport(p_ptr),
1284 port_peernode(p_ptr),
1285 ref,
1286 tipc_own_addr,
1287 imp,
1288 TIPC_CONN_MSG,
1289 TIPC_CONN_SHUTDOWN,
1290 port_out_seqno(p_ptr),
1291 0);
1292 }
1293 tipc_port_unlock(p_ptr);
1294 tipc_net_route_msg(buf);
1295 return tipc_disconnect(ref);
1296 }
1297
1298 int tipc_isconnected(u32 ref, int *isconnected)
1299 {
1300 struct port *p_ptr;
1301
1302 p_ptr = tipc_port_lock(ref);
1303 if (!p_ptr)
1304 return -EINVAL;
1305 *isconnected = p_ptr->publ.connected;
1306 tipc_port_unlock(p_ptr);
1307 return 0;
1308 }
1309
1310 int tipc_peer(u32 ref, struct tipc_portid *peer)
1311 {
1312 struct port *p_ptr;
1313 int res;
1314
1315 p_ptr = tipc_port_lock(ref);
1316 if (!p_ptr)
1317 return -EINVAL;
1318 if (p_ptr->publ.connected) {
1319 peer->ref = port_peerport(p_ptr);
1320 peer->node = port_peernode(p_ptr);
1321 res = 0;
1322 } else
1323 res = -ENOTCONN;
1324 tipc_port_unlock(p_ptr);
1325 return res;
1326 }
1327
1328 int tipc_ref_valid(u32 ref)
1329 {
1330 /* Works irrespective of type */
1331 return !!tipc_ref_deref(ref);
1332 }
1333
1334
1335 /*
1336 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1337 * message for this node.
1338 */
1339
1340 int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1341 struct iovec const *msg_sect)
1342 {
1343 struct sk_buff *buf;
1344 int res;
1345
1346 res = tipc_msg_build(&sender->publ.phdr, msg_sect, num_sect,
1347 MAX_MSG_SIZE, !sender->user_port, &buf);
1348 if (likely(buf))
1349 tipc_port_recv_msg(buf);
1350 return res;
1351 }
1352
1353 /**
1354 * tipc_send - send message sections on connection
1355 */
1356
1357 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1358 {
1359 struct port *p_ptr;
1360 u32 destnode;
1361 int res;
1362
1363 p_ptr = tipc_port_deref(ref);
1364 if (!p_ptr || !p_ptr->publ.connected)
1365 return -EINVAL;
1366
1367 p_ptr->publ.congested = 1;
1368 if (!tipc_port_congested(p_ptr)) {
1369 destnode = port_peernode(p_ptr);
1370 if (likely(destnode != tipc_own_addr))
1371 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1372 destnode);
1373 else
1374 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1375
1376 if (likely(res != -ELINKCONG)) {
1377 port_incr_out_seqno(p_ptr);
1378 p_ptr->publ.congested = 0;
1379 p_ptr->sent++;
1380 return res;
1381 }
1382 }
1383 if (port_unreliable(p_ptr)) {
1384 p_ptr->publ.congested = 0;
1385 /* Just calculate msg length and return */
1386 return tipc_msg_calc_data_size(msg_sect, num_sect);
1387 }
1388 return -ELINKCONG;
1389 }
1390
1391 /**
1392 * tipc_send_buf - send message buffer on connection
1393 */
1394
1395 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1396 {
1397 struct port *p_ptr;
1398 struct tipc_msg *msg;
1399 u32 destnode;
1400 u32 hsz;
1401 u32 sz;
1402 u32 res;
1403
1404 p_ptr = tipc_port_deref(ref);
1405 if (!p_ptr || !p_ptr->publ.connected)
1406 return -EINVAL;
1407
1408 msg = &p_ptr->publ.phdr;
1409 hsz = msg_hdr_sz(msg);
1410 sz = hsz + dsz;
1411 msg_set_size(msg, sz);
1412 if (skb_cow(buf, hsz))
1413 return -ENOMEM;
1414
1415 skb_push(buf, hsz);
1416 skb_copy_to_linear_data(buf, msg, hsz);
1417 destnode = msg_destnode(msg);
1418 p_ptr->publ.congested = 1;
1419 if (!tipc_port_congested(p_ptr)) {
1420 if (likely(destnode != tipc_own_addr))
1421 res = tipc_send_buf_fast(buf, destnode);
1422 else {
1423 tipc_port_recv_msg(buf);
1424 res = sz;
1425 }
1426 if (likely(res != -ELINKCONG)) {
1427 port_incr_out_seqno(p_ptr);
1428 p_ptr->sent++;
1429 p_ptr->publ.congested = 0;
1430 return res;
1431 }
1432 }
1433 if (port_unreliable(p_ptr)) {
1434 p_ptr->publ.congested = 0;
1435 return dsz;
1436 }
1437 return -ELINKCONG;
1438 }
1439
1440 /**
1441 * tipc_forward2name - forward message sections to port name
1442 */
1443
1444 int tipc_forward2name(u32 ref,
1445 struct tipc_name const *name,
1446 u32 domain,
1447 u32 num_sect,
1448 struct iovec const *msg_sect,
1449 struct tipc_portid const *orig,
1450 unsigned int importance)
1451 {
1452 struct port *p_ptr;
1453 struct tipc_msg *msg;
1454 u32 destnode = domain;
1455 u32 destport;
1456 int res;
1457
1458 p_ptr = tipc_port_deref(ref);
1459 if (!p_ptr || p_ptr->publ.connected)
1460 return -EINVAL;
1461
1462 msg = &p_ptr->publ.phdr;
1463 msg_set_type(msg, TIPC_NAMED_MSG);
1464 msg_set_orignode(msg, orig->node);
1465 msg_set_origport(msg, orig->ref);
1466 msg_set_hdr_sz(msg, LONG_H_SIZE);
1467 msg_set_nametype(msg, name->type);
1468 msg_set_nameinst(msg, name->instance);
1469 msg_set_lookup_scope(msg, tipc_addr_scope(domain));
1470 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1471 msg_set_importance(msg,importance);
1472 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1473 msg_set_destnode(msg, destnode);
1474 msg_set_destport(msg, destport);
1475
1476 if (likely(destport || destnode)) {
1477 p_ptr->sent++;
1478 if (likely(destnode == tipc_own_addr))
1479 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1480 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1481 destnode);
1482 if (likely(res != -ELINKCONG))
1483 return res;
1484 if (port_unreliable(p_ptr)) {
1485 /* Just calculate msg length and return */
1486 return tipc_msg_calc_data_size(msg_sect, num_sect);
1487 }
1488 return -ELINKCONG;
1489 }
1490 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1491 TIPC_ERR_NO_NAME);
1492 }
1493
1494 /**
1495 * tipc_send2name - send message sections to port name
1496 */
1497
1498 int tipc_send2name(u32 ref,
1499 struct tipc_name const *name,
1500 unsigned int domain,
1501 unsigned int num_sect,
1502 struct iovec const *msg_sect)
1503 {
1504 struct tipc_portid orig;
1505
1506 orig.ref = ref;
1507 orig.node = tipc_own_addr;
1508 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1509 TIPC_PORT_IMPORTANCE);
1510 }
1511
1512 /**
1513 * tipc_forward_buf2name - forward message buffer to port name
1514 */
1515
1516 int tipc_forward_buf2name(u32 ref,
1517 struct tipc_name const *name,
1518 u32 domain,
1519 struct sk_buff *buf,
1520 unsigned int dsz,
1521 struct tipc_portid const *orig,
1522 unsigned int importance)
1523 {
1524 struct port *p_ptr;
1525 struct tipc_msg *msg;
1526 u32 destnode = domain;
1527 u32 destport;
1528 int res;
1529
1530 p_ptr = (struct port *)tipc_ref_deref(ref);
1531 if (!p_ptr || p_ptr->publ.connected)
1532 return -EINVAL;
1533
1534 msg = &p_ptr->publ.phdr;
1535 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1536 msg_set_importance(msg, importance);
1537 msg_set_type(msg, TIPC_NAMED_MSG);
1538 msg_set_orignode(msg, orig->node);
1539 msg_set_origport(msg, orig->ref);
1540 msg_set_nametype(msg, name->type);
1541 msg_set_nameinst(msg, name->instance);
1542 msg_set_lookup_scope(msg, tipc_addr_scope(domain));
1543 msg_set_hdr_sz(msg, LONG_H_SIZE);
1544 msg_set_size(msg, LONG_H_SIZE + dsz);
1545 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1546 msg_set_destnode(msg, destnode);
1547 msg_set_destport(msg, destport);
1548 msg_dbg(msg, "forw2name ==> ");
1549 if (skb_cow(buf, LONG_H_SIZE))
1550 return -ENOMEM;
1551 skb_push(buf, LONG_H_SIZE);
1552 skb_copy_to_linear_data(buf, msg, LONG_H_SIZE);
1553 msg_dbg(buf_msg(buf),"PREP:");
1554 if (likely(destport || destnode)) {
1555 p_ptr->sent++;
1556 if (destnode == tipc_own_addr)
1557 return tipc_port_recv_msg(buf);
1558 res = tipc_send_buf_fast(buf, destnode);
1559 if (likely(res != -ELINKCONG))
1560 return res;
1561 if (port_unreliable(p_ptr))
1562 return dsz;
1563 return -ELINKCONG;
1564 }
1565 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1566 }
1567
1568 /**
1569 * tipc_send_buf2name - send message buffer to port name
1570 */
1571
1572 int tipc_send_buf2name(u32 ref,
1573 struct tipc_name const *dest,
1574 u32 domain,
1575 struct sk_buff *buf,
1576 unsigned int dsz)
1577 {
1578 struct tipc_portid orig;
1579
1580 orig.ref = ref;
1581 orig.node = tipc_own_addr;
1582 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1583 TIPC_PORT_IMPORTANCE);
1584 }
1585
1586 /**
1587 * tipc_forward2port - forward message sections to port identity
1588 */
1589
1590 int tipc_forward2port(u32 ref,
1591 struct tipc_portid const *dest,
1592 unsigned int num_sect,
1593 struct iovec const *msg_sect,
1594 struct tipc_portid const *orig,
1595 unsigned int importance)
1596 {
1597 struct port *p_ptr;
1598 struct tipc_msg *msg;
1599 int res;
1600
1601 p_ptr = tipc_port_deref(ref);
1602 if (!p_ptr || p_ptr->publ.connected)
1603 return -EINVAL;
1604
1605 msg = &p_ptr->publ.phdr;
1606 msg_set_type(msg, TIPC_DIRECT_MSG);
1607 msg_set_orignode(msg, orig->node);
1608 msg_set_origport(msg, orig->ref);
1609 msg_set_destnode(msg, dest->node);
1610 msg_set_destport(msg, dest->ref);
1611 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1612 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1613 msg_set_importance(msg, importance);
1614 p_ptr->sent++;
1615 if (dest->node == tipc_own_addr)
1616 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1617 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1618 if (likely(res != -ELINKCONG))
1619 return res;
1620 if (port_unreliable(p_ptr)) {
1621 /* Just calculate msg length and return */
1622 return tipc_msg_calc_data_size(msg_sect, num_sect);
1623 }
1624 return -ELINKCONG;
1625 }
1626
1627 /**
1628 * tipc_send2port - send message sections to port identity
1629 */
1630
1631 int tipc_send2port(u32 ref,
1632 struct tipc_portid const *dest,
1633 unsigned int num_sect,
1634 struct iovec const *msg_sect)
1635 {
1636 struct tipc_portid orig;
1637
1638 orig.ref = ref;
1639 orig.node = tipc_own_addr;
1640 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1641 TIPC_PORT_IMPORTANCE);
1642 }
1643
1644 /**
1645 * tipc_forward_buf2port - forward message buffer to port identity
1646 */
1647 int tipc_forward_buf2port(u32 ref,
1648 struct tipc_portid const *dest,
1649 struct sk_buff *buf,
1650 unsigned int dsz,
1651 struct tipc_portid const *orig,
1652 unsigned int importance)
1653 {
1654 struct port *p_ptr;
1655 struct tipc_msg *msg;
1656 int res;
1657
1658 p_ptr = (struct port *)tipc_ref_deref(ref);
1659 if (!p_ptr || p_ptr->publ.connected)
1660 return -EINVAL;
1661
1662 msg = &p_ptr->publ.phdr;
1663 msg_set_type(msg, TIPC_DIRECT_MSG);
1664 msg_set_orignode(msg, orig->node);
1665 msg_set_origport(msg, orig->ref);
1666 msg_set_destnode(msg, dest->node);
1667 msg_set_destport(msg, dest->ref);
1668 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1669 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1670 msg_set_importance(msg, importance);
1671 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1672 if (skb_cow(buf, DIR_MSG_H_SIZE))
1673 return -ENOMEM;
1674
1675 skb_push(buf, DIR_MSG_H_SIZE);
1676 skb_copy_to_linear_data(buf, msg, DIR_MSG_H_SIZE);
1677 msg_dbg(msg, "buf2port: ");
1678 p_ptr->sent++;
1679 if (dest->node == tipc_own_addr)
1680 return tipc_port_recv_msg(buf);
1681 res = tipc_send_buf_fast(buf, dest->node);
1682 if (likely(res != -ELINKCONG))
1683 return res;
1684 if (port_unreliable(p_ptr))
1685 return dsz;
1686 return -ELINKCONG;
1687 }
1688
1689 /**
1690 * tipc_send_buf2port - send message buffer to port identity
1691 */
1692
1693 int tipc_send_buf2port(u32 ref,
1694 struct tipc_portid const *dest,
1695 struct sk_buff *buf,
1696 unsigned int dsz)
1697 {
1698 struct tipc_portid orig;
1699
1700 orig.ref = ref;
1701 orig.node = tipc_own_addr;
1702 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1703 TIPC_PORT_IMPORTANCE);
1704 }
1705
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