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[SPARC64]: Fix 2 bugs in huge page support.
[linux-2.6/verdex.git] / net / tipc / port.c
blob72aae52bfec1849902d4293c3ddc447f38b96190
1 /*
2 * net/tipc/port.c: TIPC port code
3 *
4 * Copyright (c) 1992-2006, Ericsson AB
5 * Copyright (c) 2004-2005, Wind River Systems
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the names of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * Alternatively, this software may be distributed under the terms of the
21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 #include "core.h"
38 #include "config.h"
39 #include "dbg.h"
40 #include "port.h"
41 #include "addr.h"
42 #include "link.h"
43 #include "node.h"
44 #include "port.h"
45 #include "name_table.h"
46 #include "user_reg.h"
47 #include "msg.h"
48 #include "bcast.h"
49
50 /* Connection management: */
51 #define PROBING_INTERVAL 3600000 /* [ms] => 1 h */
52 #define CONFIRMED 0
53 #define PROBING 1
54
55 #define MAX_REJECT_SIZE 1024
56
57 static struct sk_buff *msg_queue_head = 0;
58 static struct sk_buff *msg_queue_tail = 0;
59
60 spinlock_t tipc_port_list_lock = SPIN_LOCK_UNLOCKED;
61 static spinlock_t queue_lock = SPIN_LOCK_UNLOCKED;
62
63 static LIST_HEAD(ports);
64 static void port_handle_node_down(unsigned long ref);
65 static struct sk_buff* port_build_self_abort_msg(struct port *,u32 err);
66 static struct sk_buff* port_build_peer_abort_msg(struct port *,u32 err);
67 static void port_timeout(unsigned long ref);
68
69
70 static inline u32 port_peernode(struct port *p_ptr)
71 {
72 return msg_destnode(&p_ptr->publ.phdr);
73 }
74
75 static inline u32 port_peerport(struct port *p_ptr)
76 {
77 return msg_destport(&p_ptr->publ.phdr);
78 }
79
80 static inline u32 port_out_seqno(struct port *p_ptr)
81 {
82 return msg_transp_seqno(&p_ptr->publ.phdr);
83 }
84
85 static inline void port_set_out_seqno(struct port *p_ptr, u32 seqno)
86 {
87 msg_set_transp_seqno(&p_ptr->publ.phdr,seqno);
88 }
89
90 static inline void port_incr_out_seqno(struct port *p_ptr)
91 {
92 struct tipc_msg *m = &p_ptr->publ.phdr;
93
94 if (likely(!msg_routed(m)))
95 return;
96 msg_set_transp_seqno(m, (msg_transp_seqno(m) + 1));
97 }
98
99 /**
100 * tipc_multicast - send a multicast message to local and remote destinations
101 */
102
103 int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, u32 domain,
104 u32 num_sect, struct iovec const *msg_sect)
105 {
106 struct tipc_msg *hdr;
107 struct sk_buff *buf;
108 struct sk_buff *ibuf = NULL;
109 struct port_list dports = {0, NULL, };
110 struct port *oport = tipc_port_deref(ref);
111 int ext_targets;
112 int res;
113
114 if (unlikely(!oport))
115 return -EINVAL;
116
117 /* Create multicast message */
118
119 hdr = &oport->publ.phdr;
120 msg_set_type(hdr, TIPC_MCAST_MSG);
121 msg_set_nametype(hdr, seq->type);
122 msg_set_namelower(hdr, seq->lower);
123 msg_set_nameupper(hdr, seq->upper);
124 msg_set_hdr_sz(hdr, MCAST_H_SIZE);
125 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
126 !oport->user_port, &buf);
127 if (unlikely(!buf))
128 return res;
129
130 /* Figure out where to send multicast message */
131
132 ext_targets = tipc_nametbl_mc_translate(seq->type, seq->lower, seq->upper,
133 TIPC_NODE_SCOPE, &dports);
134
135 /* Send message to destinations (duplicate it only if necessary) */
136
137 if (ext_targets) {
138 if (dports.count != 0) {
139 ibuf = skb_copy(buf, GFP_ATOMIC);
140 if (ibuf == NULL) {
141 tipc_port_list_free(&dports);
142 buf_discard(buf);
143 return -ENOMEM;
144 }
145 }
146 res = tipc_bclink_send_msg(buf);
147 if ((res < 0) && (dports.count != 0)) {
148 buf_discard(ibuf);
149 }
150 } else {
151 ibuf = buf;
152 }
153
154 if (res >= 0) {
155 if (ibuf)
156 tipc_port_recv_mcast(ibuf, &dports);
157 } else {
158 tipc_port_list_free(&dports);
159 }
160 return res;
161 }
162
163 /**
164 * tipc_port_recv_mcast - deliver multicast message to all destination ports
165 *
166 * If there is no port list, perform a lookup to create one
167 */
168
169 void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp)
170 {
171 struct tipc_msg* msg;
172 struct port_list dports = {0, NULL, };
173 struct port_list *item = dp;
174 int cnt = 0;
175
176 assert(buf);
177 msg = buf_msg(buf);
178
179 /* Create destination port list, if one wasn't supplied */
180
181 if (dp == NULL) {
182 tipc_nametbl_mc_translate(msg_nametype(msg),
183 msg_namelower(msg),
184 msg_nameupper(msg),
185 TIPC_CLUSTER_SCOPE,
186 &dports);
187 item = dp = &dports;
188 }
189
190 /* Deliver a copy of message to each destination port */
191
192 if (dp->count != 0) {
193 if (dp->count == 1) {
194 msg_set_destport(msg, dp->ports[0]);
195 tipc_port_recv_msg(buf);
196 tipc_port_list_free(dp);
197 return;
198 }
199 for (; cnt < dp->count; cnt++) {
200 int index = cnt % PLSIZE;
201 struct sk_buff *b = skb_clone(buf, GFP_ATOMIC);
202
203 if (b == NULL) {
204 warn("Buffer allocation failure\n");
205 msg_dbg(msg, "LOST:");
206 goto exit;
207 }
208 if ((index == 0) && (cnt != 0)) {
209 item = item->next;
210 }
211 msg_set_destport(buf_msg(b),item->ports[index]);
212 tipc_port_recv_msg(b);
213 }
214 }
215 exit:
216 buf_discard(buf);
217 tipc_port_list_free(dp);
218 }
219
220 /**
221 * tipc_createport_raw - create a native TIPC port
222 *
223 * Returns local port reference
224 */
225
226 u32 tipc_createport_raw(void *usr_handle,
227 u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
228 void (*wakeup)(struct tipc_port *),
229 const u32 importance)
230 {
231 struct port *p_ptr;
232 struct tipc_msg *msg;
233 u32 ref;
234
235 p_ptr = kmalloc(sizeof(*p_ptr), GFP_ATOMIC);
236 if (p_ptr == NULL) {
237 warn("Memory squeeze; failed to create port\n");
238 return 0;
239 }
240 memset(p_ptr, 0, sizeof(*p_ptr));
241 ref = tipc_ref_acquire(p_ptr, &p_ptr->publ.lock);
242 if (!ref) {
243 warn("Reference Table Exhausted\n");
244 kfree(p_ptr);
245 return 0;
246 }
247
248 tipc_port_lock(ref);
249 p_ptr->publ.ref = ref;
250 msg = &p_ptr->publ.phdr;
251 msg_init(msg, DATA_LOW, TIPC_NAMED_MSG, TIPC_OK, LONG_H_SIZE, 0);
252 msg_set_orignode(msg, tipc_own_addr);
253 msg_set_prevnode(msg, tipc_own_addr);
254 msg_set_origport(msg, ref);
255 msg_set_importance(msg,importance);
256 p_ptr->last_in_seqno = 41;
257 p_ptr->sent = 1;
258 p_ptr->publ.usr_handle = usr_handle;
259 INIT_LIST_HEAD(&p_ptr->wait_list);
260 INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
261 p_ptr->congested_link = 0;
262 p_ptr->max_pkt = MAX_PKT_DEFAULT;
263 p_ptr->dispatcher = dispatcher;
264 p_ptr->wakeup = wakeup;
265 p_ptr->user_port = 0;
266 k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
267 spin_lock_bh(&tipc_port_list_lock);
268 INIT_LIST_HEAD(&p_ptr->publications);
269 INIT_LIST_HEAD(&p_ptr->port_list);
270 list_add_tail(&p_ptr->port_list, &ports);
271 spin_unlock_bh(&tipc_port_list_lock);
272 tipc_port_unlock(p_ptr);
273 return ref;
274 }
275
276 int tipc_deleteport(u32 ref)
277 {
278 struct port *p_ptr;
279 struct sk_buff *buf = 0;
280
281 tipc_withdraw(ref, 0, 0);
282 p_ptr = tipc_port_lock(ref);
283 if (!p_ptr)
284 return -EINVAL;
285
286 tipc_ref_discard(ref);
287 tipc_port_unlock(p_ptr);
288
289 k_cancel_timer(&p_ptr->timer);
290 if (p_ptr->publ.connected) {
291 buf = port_build_peer_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
292 tipc_nodesub_unsubscribe(&p_ptr->subscription);
293 }
294 if (p_ptr->user_port) {
295 tipc_reg_remove_port(p_ptr->user_port);
296 kfree(p_ptr->user_port);
297 }
298
299 spin_lock_bh(&tipc_port_list_lock);
300 list_del(&p_ptr->port_list);
301 list_del(&p_ptr->wait_list);
302 spin_unlock_bh(&tipc_port_list_lock);
303 k_term_timer(&p_ptr->timer);
304 kfree(p_ptr);
305 dbg("Deleted port %u\n", ref);
306 tipc_net_route_msg(buf);
307 return TIPC_OK;
308 }
309
310 /**
311 * tipc_get_port() - return port associated with 'ref'
312 *
313 * Note: Port is not locked.
314 */
315
316 struct tipc_port *tipc_get_port(const u32 ref)
317 {
318 return (struct tipc_port *)tipc_ref_deref(ref);
319 }
320
321 /**
322 * tipc_get_handle - return user handle associated to port 'ref'
323 */
324
325 void *tipc_get_handle(const u32 ref)
326 {
327 struct port *p_ptr;
328 void * handle;
329
330 p_ptr = tipc_port_lock(ref);
331 if (!p_ptr)
332 return 0;
333 handle = p_ptr->publ.usr_handle;
334 tipc_port_unlock(p_ptr);
335 return handle;
336 }
337
338 static inline int port_unreliable(struct port *p_ptr)
339 {
340 return msg_src_droppable(&p_ptr->publ.phdr);
341 }
342
343 int tipc_portunreliable(u32 ref, unsigned int *isunreliable)
344 {
345 struct port *p_ptr;
346
347 p_ptr = tipc_port_lock(ref);
348 if (!p_ptr)
349 return -EINVAL;
350 *isunreliable = port_unreliable(p_ptr);
351 spin_unlock_bh(p_ptr->publ.lock);
352 return TIPC_OK;
353 }
354
355 int tipc_set_portunreliable(u32 ref, unsigned int isunreliable)
356 {
357 struct port *p_ptr;
358
359 p_ptr = tipc_port_lock(ref);
360 if (!p_ptr)
361 return -EINVAL;
362 msg_set_src_droppable(&p_ptr->publ.phdr, (isunreliable != 0));
363 tipc_port_unlock(p_ptr);
364 return TIPC_OK;
365 }
366
367 static inline int port_unreturnable(struct port *p_ptr)
368 {
369 return msg_dest_droppable(&p_ptr->publ.phdr);
370 }
371
372 int tipc_portunreturnable(u32 ref, unsigned int *isunrejectable)
373 {
374 struct port *p_ptr;
375
376 p_ptr = tipc_port_lock(ref);
377 if (!p_ptr)
378 return -EINVAL;
379 *isunrejectable = port_unreturnable(p_ptr);
380 spin_unlock_bh(p_ptr->publ.lock);
381 return TIPC_OK;
382 }
383
384 int tipc_set_portunreturnable(u32 ref, unsigned int isunrejectable)
385 {
386 struct port *p_ptr;
387
388 p_ptr = tipc_port_lock(ref);
389 if (!p_ptr)
390 return -EINVAL;
391 msg_set_dest_droppable(&p_ptr->publ.phdr, (isunrejectable != 0));
392 tipc_port_unlock(p_ptr);
393 return TIPC_OK;
394 }
395
396 /*
397 * port_build_proto_msg(): build a port level protocol
398 * or a connection abortion message. Called with
399 * tipc_port lock on.
400 */
401 static struct sk_buff *port_build_proto_msg(u32 destport, u32 destnode,
402 u32 origport, u32 orignode,
403 u32 usr, u32 type, u32 err,
404 u32 seqno, u32 ack)
405 {
406 struct sk_buff *buf;
407 struct tipc_msg *msg;
408
409 buf = buf_acquire(LONG_H_SIZE);
410 if (buf) {
411 msg = buf_msg(buf);
412 msg_init(msg, usr, type, err, LONG_H_SIZE, destnode);
413 msg_set_destport(msg, destport);
414 msg_set_origport(msg, origport);
415 msg_set_destnode(msg, destnode);
416 msg_set_orignode(msg, orignode);
417 msg_set_transp_seqno(msg, seqno);
418 msg_set_msgcnt(msg, ack);
419 msg_dbg(msg, "PORT>SEND>:");
420 }
421 return buf;
422 }
423
424 int tipc_set_msg_option(struct tipc_port *tp_ptr, const char *opt, const u32 sz)
425 {
426 msg_expand(&tp_ptr->phdr, msg_destnode(&tp_ptr->phdr));
427 msg_set_options(&tp_ptr->phdr, opt, sz);
428 return TIPC_OK;
429 }
430
431 int tipc_reject_msg(struct sk_buff *buf, u32 err)
432 {
433 struct tipc_msg *msg = buf_msg(buf);
434 struct sk_buff *rbuf;
435 struct tipc_msg *rmsg;
436 int hdr_sz;
437 u32 imp = msg_importance(msg);
438 u32 data_sz = msg_data_sz(msg);
439
440 if (data_sz > MAX_REJECT_SIZE)
441 data_sz = MAX_REJECT_SIZE;
442 if (msg_connected(msg) && (imp < TIPC_CRITICAL_IMPORTANCE))
443 imp++;
444 msg_dbg(msg, "port->rej: ");
445
446 /* discard rejected message if it shouldn't be returned to sender */
447 if (msg_errcode(msg) || msg_dest_droppable(msg)) {
448 buf_discard(buf);
449 return data_sz;
450 }
451
452 /* construct rejected message */
453 if (msg_mcast(msg))
454 hdr_sz = MCAST_H_SIZE;
455 else
456 hdr_sz = LONG_H_SIZE;
457 rbuf = buf_acquire(data_sz + hdr_sz);
458 if (rbuf == NULL) {
459 buf_discard(buf);
460 return data_sz;
461 }
462 rmsg = buf_msg(rbuf);
463 msg_init(rmsg, imp, msg_type(msg), err, hdr_sz, msg_orignode(msg));
464 msg_set_destport(rmsg, msg_origport(msg));
465 msg_set_prevnode(rmsg, tipc_own_addr);
466 msg_set_origport(rmsg, msg_destport(msg));
467 if (msg_short(msg))
468 msg_set_orignode(rmsg, tipc_own_addr);
469 else
470 msg_set_orignode(rmsg, msg_destnode(msg));
471 msg_set_size(rmsg, data_sz + hdr_sz);
472 msg_set_nametype(rmsg, msg_nametype(msg));
473 msg_set_nameinst(rmsg, msg_nameinst(msg));
474 memcpy(rbuf->data + hdr_sz, msg_data(msg), data_sz);
475
476 /* send self-abort message when rejecting on a connected port */
477 if (msg_connected(msg)) {
478 struct sk_buff *abuf = 0;
479 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
480
481 if (p_ptr) {
482 if (p_ptr->publ.connected)
483 abuf = port_build_self_abort_msg(p_ptr, err);
484 tipc_port_unlock(p_ptr);
485 }
486 tipc_net_route_msg(abuf);
487 }
488
489 /* send rejected message */
490 buf_discard(buf);
491 tipc_net_route_msg(rbuf);
492 return data_sz;
493 }
494
495 int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
496 struct iovec const *msg_sect, u32 num_sect,
497 int err)
498 {
499 struct sk_buff *buf;
500 int res;
501
502 res = msg_build(hdr, msg_sect, num_sect, MAX_MSG_SIZE,
503 !p_ptr->user_port, &buf);
504 if (!buf)
505 return res;
506
507 return tipc_reject_msg(buf, err);
508 }
509
510 static void port_timeout(unsigned long ref)
511 {
512 struct port *p_ptr = tipc_port_lock(ref);
513 struct sk_buff *buf = 0;
514
515 if (!p_ptr || !p_ptr->publ.connected)
516 return;
517
518 /* Last probe answered ? */
519 if (p_ptr->probing_state == PROBING) {
520 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_PORT);
521 } else {
522 buf = port_build_proto_msg(port_peerport(p_ptr),
523 port_peernode(p_ptr),
524 p_ptr->publ.ref,
525 tipc_own_addr,
526 CONN_MANAGER,
527 CONN_PROBE,
528 TIPC_OK,
529 port_out_seqno(p_ptr),
530 0);
531 port_incr_out_seqno(p_ptr);
532 p_ptr->probing_state = PROBING;
533 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
534 }
535 tipc_port_unlock(p_ptr);
536 tipc_net_route_msg(buf);
537 }
538
539
540 static void port_handle_node_down(unsigned long ref)
541 {
542 struct port *p_ptr = tipc_port_lock(ref);
543 struct sk_buff* buf = 0;
544
545 if (!p_ptr)
546 return;
547 buf = port_build_self_abort_msg(p_ptr, TIPC_ERR_NO_NODE);
548 tipc_port_unlock(p_ptr);
549 tipc_net_route_msg(buf);
550 }
551
552
553 static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
554 {
555 u32 imp = msg_importance(&p_ptr->publ.phdr);
556
557 if (!p_ptr->publ.connected)
558 return 0;
559 if (imp < TIPC_CRITICAL_IMPORTANCE)
560 imp++;
561 return port_build_proto_msg(p_ptr->publ.ref,
562 tipc_own_addr,
563 port_peerport(p_ptr),
564 port_peernode(p_ptr),
565 imp,
566 TIPC_CONN_MSG,
567 err,
568 p_ptr->last_in_seqno + 1,
569 0);
570 }
571
572
573 static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
574 {
575 u32 imp = msg_importance(&p_ptr->publ.phdr);
576
577 if (!p_ptr->publ.connected)
578 return 0;
579 if (imp < TIPC_CRITICAL_IMPORTANCE)
580 imp++;
581 return port_build_proto_msg(port_peerport(p_ptr),
582 port_peernode(p_ptr),
583 p_ptr->publ.ref,
584 tipc_own_addr,
585 imp,
586 TIPC_CONN_MSG,
587 err,
588 port_out_seqno(p_ptr),
589 0);
590 }
591
592 void tipc_port_recv_proto_msg(struct sk_buff *buf)
593 {
594 struct tipc_msg *msg = buf_msg(buf);
595 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
596 u32 err = TIPC_OK;
597 struct sk_buff *r_buf = 0;
598 struct sk_buff *abort_buf = 0;
599
600 msg_dbg(msg, "PORT<RECV<:");
601
602 if (!p_ptr) {
603 err = TIPC_ERR_NO_PORT;
604 } else if (p_ptr->publ.connected) {
605 if (port_peernode(p_ptr) != msg_orignode(msg))
606 err = TIPC_ERR_NO_PORT;
607 if (port_peerport(p_ptr) != msg_origport(msg))
608 err = TIPC_ERR_NO_PORT;
609 if (!err && msg_routed(msg)) {
610 u32 seqno = msg_transp_seqno(msg);
611 u32 myno = ++p_ptr->last_in_seqno;
612 if (seqno != myno) {
613 err = TIPC_ERR_NO_PORT;
614 abort_buf = port_build_self_abort_msg(p_ptr, err);
615 }
616 }
617 if (msg_type(msg) == CONN_ACK) {
618 int wakeup = tipc_port_congested(p_ptr) &&
619 p_ptr->publ.congested &&
620 p_ptr->wakeup;
621 p_ptr->acked += msg_msgcnt(msg);
622 if (tipc_port_congested(p_ptr))
623 goto exit;
624 p_ptr->publ.congested = 0;
625 if (!wakeup)
626 goto exit;
627 p_ptr->wakeup(&p_ptr->publ);
628 goto exit;
629 }
630 } else if (p_ptr->publ.published) {
631 err = TIPC_ERR_NO_PORT;
632 }
633 if (err) {
634 r_buf = port_build_proto_msg(msg_origport(msg),
635 msg_orignode(msg),
636 msg_destport(msg),
637 tipc_own_addr,
638 DATA_HIGH,
639 TIPC_CONN_MSG,
640 err,
641 0,
642 0);
643 goto exit;
644 }
645
646 /* All is fine */
647 if (msg_type(msg) == CONN_PROBE) {
648 r_buf = port_build_proto_msg(msg_origport(msg),
649 msg_orignode(msg),
650 msg_destport(msg),
651 tipc_own_addr,
652 CONN_MANAGER,
653 CONN_PROBE_REPLY,
654 TIPC_OK,
655 port_out_seqno(p_ptr),
656 0);
657 }
658 p_ptr->probing_state = CONFIRMED;
659 port_incr_out_seqno(p_ptr);
660 exit:
661 if (p_ptr)
662 tipc_port_unlock(p_ptr);
663 tipc_net_route_msg(r_buf);
664 tipc_net_route_msg(abort_buf);
665 buf_discard(buf);
666 }
667
668 static void port_print(struct port *p_ptr, struct print_buf *buf, int full_id)
669 {
670 struct publication *publ;
671
672 if (full_id)
673 tipc_printf(buf, "<%u.%u.%u:%u>:",
674 tipc_zone(tipc_own_addr), tipc_cluster(tipc_own_addr),
675 tipc_node(tipc_own_addr), p_ptr->publ.ref);
676 else
677 tipc_printf(buf, "%-10u:", p_ptr->publ.ref);
678
679 if (p_ptr->publ.connected) {
680 u32 dport = port_peerport(p_ptr);
681 u32 destnode = port_peernode(p_ptr);
682
683 tipc_printf(buf, " connected to <%u.%u.%u:%u>",
684 tipc_zone(destnode), tipc_cluster(destnode),
685 tipc_node(destnode), dport);
686 if (p_ptr->publ.conn_type != 0)
687 tipc_printf(buf, " via {%u,%u}",
688 p_ptr->publ.conn_type,
689 p_ptr->publ.conn_instance);
690 }
691 else if (p_ptr->publ.published) {
692 tipc_printf(buf, " bound to");
693 list_for_each_entry(publ, &p_ptr->publications, pport_list) {
694 if (publ->lower == publ->upper)
695 tipc_printf(buf, " {%u,%u}", publ->type,
696 publ->lower);
697 else
698 tipc_printf(buf, " {%u,%u,%u}", publ->type,
699 publ->lower, publ->upper);
700 }
701 }
702 tipc_printf(buf, "\n");
703 }
704
705 #define MAX_PORT_QUERY 32768
706
707 struct sk_buff *tipc_port_get_ports(void)
708 {
709 struct sk_buff *buf;
710 struct tlv_desc *rep_tlv;
711 struct print_buf pb;
712 struct port *p_ptr;
713 int str_len;
714
715 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_QUERY));
716 if (!buf)
717 return NULL;
718 rep_tlv = (struct tlv_desc *)buf->data;
719
720 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_QUERY);
721 spin_lock_bh(&tipc_port_list_lock);
722 list_for_each_entry(p_ptr, &ports, port_list) {
723 spin_lock_bh(p_ptr->publ.lock);
724 port_print(p_ptr, &pb, 0);
725 spin_unlock_bh(p_ptr->publ.lock);
726 }
727 spin_unlock_bh(&tipc_port_list_lock);
728 str_len = tipc_printbuf_validate(&pb);
729
730 skb_put(buf, TLV_SPACE(str_len));
731 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
732
733 return buf;
734 }
735
736 #if 0
737
738 #define MAX_PORT_STATS 2000
739
740 struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space)
741 {
742 u32 ref;
743 struct port *p_ptr;
744 struct sk_buff *buf;
745 struct tlv_desc *rep_tlv;
746 struct print_buf pb;
747 int str_len;
748
749 if (!TLV_CHECK(req_tlv_area, req_tlv_space, TIPC_TLV_PORT_REF))
750 return cfg_reply_error_string(TIPC_CFG_TLV_ERROR);
751
752 ref = *(u32 *)TLV_DATA(req_tlv_area);
753 ref = ntohl(ref);
754
755 p_ptr = tipc_port_lock(ref);
756 if (!p_ptr)
757 return cfg_reply_error_string("port not found");
758
759 buf = tipc_cfg_reply_alloc(TLV_SPACE(MAX_PORT_STATS));
760 if (!buf) {
761 tipc_port_unlock(p_ptr);
762 return NULL;
763 }
764 rep_tlv = (struct tlv_desc *)buf->data;
765
766 tipc_printbuf_init(&pb, TLV_DATA(rep_tlv), MAX_PORT_STATS);
767 port_print(p_ptr, &pb, 1);
768 /* NEED TO FILL IN ADDITIONAL PORT STATISTICS HERE */
769 tipc_port_unlock(p_ptr);
770 str_len = tipc_printbuf_validate(&pb);
771
772 skb_put(buf, TLV_SPACE(str_len));
773 TLV_SET(rep_tlv, TIPC_TLV_ULTRA_STRING, NULL, str_len);
774
775 return buf;
776 }
777
778 #endif
779
780 void tipc_port_reinit(void)
781 {
782 struct port *p_ptr;
783 struct tipc_msg *msg;
784
785 spin_lock_bh(&tipc_port_list_lock);
786 list_for_each_entry(p_ptr, &ports, port_list) {
787 msg = &p_ptr->publ.phdr;
788 if (msg_orignode(msg) == tipc_own_addr)
789 break;
790 msg_set_orignode(msg, tipc_own_addr);
791 }
792 spin_unlock_bh(&tipc_port_list_lock);
793 }
794
795
796 /*
797 * port_dispatcher_sigh(): Signal handler for messages destinated
798 * to the tipc_port interface.
799 */
800
801 static void port_dispatcher_sigh(void *dummy)
802 {
803 struct sk_buff *buf;
804
805 spin_lock_bh(&queue_lock);
806 buf = msg_queue_head;
807 msg_queue_head = 0;
808 spin_unlock_bh(&queue_lock);
809
810 while (buf) {
811 struct port *p_ptr;
812 struct user_port *up_ptr;
813 struct tipc_portid orig;
814 struct tipc_name_seq dseq;
815 void *usr_handle;
816 int connected;
817 int published;
818
819 struct sk_buff *next = buf->next;
820 struct tipc_msg *msg = buf_msg(buf);
821 u32 dref = msg_destport(msg);
822
823 p_ptr = tipc_port_lock(dref);
824 if (!p_ptr) {
825 /* Port deleted while msg in queue */
826 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
827 buf = next;
828 continue;
829 }
830 orig.ref = msg_origport(msg);
831 orig.node = msg_orignode(msg);
832 up_ptr = p_ptr->user_port;
833 usr_handle = up_ptr->usr_handle;
834 connected = p_ptr->publ.connected;
835 published = p_ptr->publ.published;
836
837 if (unlikely(msg_errcode(msg)))
838 goto err;
839
840 switch (msg_type(msg)) {
841
842 case TIPC_CONN_MSG:{
843 tipc_conn_msg_event cb = up_ptr->conn_msg_cb;
844 u32 peer_port = port_peerport(p_ptr);
845 u32 peer_node = port_peernode(p_ptr);
846
847 spin_unlock_bh(p_ptr->publ.lock);
848 if (unlikely(!connected)) {
849 if (unlikely(published))
850 goto reject;
851 tipc_connect2port(dref,&orig);
852 }
853 if (unlikely(msg_origport(msg) != peer_port))
854 goto reject;
855 if (unlikely(msg_orignode(msg) != peer_node))
856 goto reject;
857 if (unlikely(!cb))
858 goto reject;
859 if (unlikely(++p_ptr->publ.conn_unacked >=
860 TIPC_FLOW_CONTROL_WIN))
861 tipc_acknowledge(dref,
862 p_ptr->publ.conn_unacked);
863 skb_pull(buf, msg_hdr_sz(msg));
864 cb(usr_handle, dref, &buf, msg_data(msg),
865 msg_data_sz(msg));
866 break;
867 }
868 case TIPC_DIRECT_MSG:{
869 tipc_msg_event cb = up_ptr->msg_cb;
870
871 spin_unlock_bh(p_ptr->publ.lock);
872 if (unlikely(connected))
873 goto reject;
874 if (unlikely(!cb))
875 goto reject;
876 skb_pull(buf, msg_hdr_sz(msg));
877 cb(usr_handle, dref, &buf, msg_data(msg),
878 msg_data_sz(msg), msg_importance(msg),
879 &orig);
880 break;
881 }
882 case TIPC_NAMED_MSG:{
883 tipc_named_msg_event cb = up_ptr->named_msg_cb;
884
885 spin_unlock_bh(p_ptr->publ.lock);
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 = dseq.lower;
895 skb_pull(buf, msg_hdr_sz(msg));
896 cb(usr_handle, dref, &buf, msg_data(msg),
897 msg_data_sz(msg), msg_importance(msg),
898 &orig, &dseq);
899 break;
900 }
901 }
902 if (buf)
903 buf_discard(buf);
904 buf = next;
905 continue;
906 err:
907 switch (msg_type(msg)) {
908
909 case TIPC_CONN_MSG:{
910 tipc_conn_shutdown_event cb =
911 up_ptr->conn_err_cb;
912 u32 peer_port = port_peerport(p_ptr);
913 u32 peer_node = port_peernode(p_ptr);
914
915 spin_unlock_bh(p_ptr->publ.lock);
916 if (!connected || !cb)
917 break;
918 if (msg_origport(msg) != peer_port)
919 break;
920 if (msg_orignode(msg) != peer_node)
921 break;
922 tipc_disconnect(dref);
923 skb_pull(buf, msg_hdr_sz(msg));
924 cb(usr_handle, dref, &buf, msg_data(msg),
925 msg_data_sz(msg), msg_errcode(msg));
926 break;
927 }
928 case TIPC_DIRECT_MSG:{
929 tipc_msg_err_event cb = up_ptr->err_cb;
930
931 spin_unlock_bh(p_ptr->publ.lock);
932 if (connected || !cb)
933 break;
934 skb_pull(buf, msg_hdr_sz(msg));
935 cb(usr_handle, dref, &buf, msg_data(msg),
936 msg_data_sz(msg), msg_errcode(msg), &orig);
937 break;
938 }
939 case TIPC_NAMED_MSG:{
940 tipc_named_msg_err_event cb =
941 up_ptr->named_err_cb;
942
943 spin_unlock_bh(p_ptr->publ.lock);
944 if (connected || !cb)
945 break;
946 dseq.type = msg_nametype(msg);
947 dseq.lower = msg_nameinst(msg);
948 dseq.upper = dseq.lower;
949 skb_pull(buf, msg_hdr_sz(msg));
950 cb(usr_handle, dref, &buf, msg_data(msg),
951 msg_data_sz(msg), msg_errcode(msg), &dseq);
952 break;
953 }
954 }
955 if (buf)
956 buf_discard(buf);
957 buf = next;
958 continue;
959 reject:
960 tipc_reject_msg(buf, TIPC_ERR_NO_PORT);
961 buf = next;
962 }
963 }
964
965 /*
966 * port_dispatcher(): Dispatcher for messages destinated
967 * to the tipc_port interface. Called with port locked.
968 */
969
970 static u32 port_dispatcher(struct tipc_port *dummy, struct sk_buff *buf)
971 {
972 buf->next = NULL;
973 spin_lock_bh(&queue_lock);
974 if (msg_queue_head) {
975 msg_queue_tail->next = buf;
976 msg_queue_tail = buf;
977 } else {
978 msg_queue_tail = msg_queue_head = buf;
979 tipc_k_signal((Handler)port_dispatcher_sigh, 0);
980 }
981 spin_unlock_bh(&queue_lock);
982 return TIPC_OK;
983 }
984
985 /*
986 * Wake up port after congestion: Called with port locked,
987 *
988 */
989
990 static void port_wakeup_sh(unsigned long ref)
991 {
992 struct port *p_ptr;
993 struct user_port *up_ptr;
994 tipc_continue_event cb = 0;
995 void *uh = 0;
996
997 p_ptr = tipc_port_lock(ref);
998 if (p_ptr) {
999 up_ptr = p_ptr->user_port;
1000 if (up_ptr) {
1001 cb = up_ptr->continue_event_cb;
1002 uh = up_ptr->usr_handle;
1003 }
1004 tipc_port_unlock(p_ptr);
1005 }
1006 if (cb)
1007 cb(uh, ref);
1008 }
1009
1010
1011 static void port_wakeup(struct tipc_port *p_ptr)
1012 {
1013 tipc_k_signal((Handler)port_wakeup_sh, p_ptr->ref);
1014 }
1015
1016 void tipc_acknowledge(u32 ref, u32 ack)
1017 {
1018 struct port *p_ptr;
1019 struct sk_buff *buf = 0;
1020
1021 p_ptr = tipc_port_lock(ref);
1022 if (!p_ptr)
1023 return;
1024 if (p_ptr->publ.connected) {
1025 p_ptr->publ.conn_unacked -= ack;
1026 buf = port_build_proto_msg(port_peerport(p_ptr),
1027 port_peernode(p_ptr),
1028 ref,
1029 tipc_own_addr,
1030 CONN_MANAGER,
1031 CONN_ACK,
1032 TIPC_OK,
1033 port_out_seqno(p_ptr),
1034 ack);
1035 }
1036 tipc_port_unlock(p_ptr);
1037 tipc_net_route_msg(buf);
1038 }
1039
1040 /*
1041 * tipc_createport(): user level call. Will add port to
1042 * registry if non-zero user_ref.
1043 */
1044
1045 int tipc_createport(u32 user_ref,
1046 void *usr_handle,
1047 unsigned int importance,
1048 tipc_msg_err_event error_cb,
1049 tipc_named_msg_err_event named_error_cb,
1050 tipc_conn_shutdown_event conn_error_cb,
1051 tipc_msg_event msg_cb,
1052 tipc_named_msg_event named_msg_cb,
1053 tipc_conn_msg_event conn_msg_cb,
1054 tipc_continue_event continue_event_cb,/* May be zero */
1055 u32 *portref)
1056 {
1057 struct user_port *up_ptr;
1058 struct port *p_ptr;
1059 u32 ref;
1060
1061 up_ptr = (struct user_port *)kmalloc(sizeof(*up_ptr), GFP_ATOMIC);
1062 if (up_ptr == NULL) {
1063 return -ENOMEM;
1064 }
1065 ref = tipc_createport_raw(0, port_dispatcher, port_wakeup, importance);
1066 p_ptr = tipc_port_lock(ref);
1067 if (!p_ptr) {
1068 kfree(up_ptr);
1069 return -ENOMEM;
1070 }
1071
1072 p_ptr->user_port = up_ptr;
1073 up_ptr->user_ref = user_ref;
1074 up_ptr->usr_handle = usr_handle;
1075 up_ptr->ref = p_ptr->publ.ref;
1076 up_ptr->err_cb = error_cb;
1077 up_ptr->named_err_cb = named_error_cb;
1078 up_ptr->conn_err_cb = conn_error_cb;
1079 up_ptr->msg_cb = msg_cb;
1080 up_ptr->named_msg_cb = named_msg_cb;
1081 up_ptr->conn_msg_cb = conn_msg_cb;
1082 up_ptr->continue_event_cb = continue_event_cb;
1083 INIT_LIST_HEAD(&up_ptr->uport_list);
1084 tipc_reg_add_port(up_ptr);
1085 *portref = p_ptr->publ.ref;
1086 dbg(" tipc_createport: %x with ref %u\n", p_ptr, p_ptr->publ.ref);
1087 tipc_port_unlock(p_ptr);
1088 return TIPC_OK;
1089 }
1090
1091 int tipc_ownidentity(u32 ref, struct tipc_portid *id)
1092 {
1093 id->ref = ref;
1094 id->node = tipc_own_addr;
1095 return TIPC_OK;
1096 }
1097
1098 int tipc_portimportance(u32 ref, unsigned int *importance)
1099 {
1100 struct port *p_ptr;
1101
1102 p_ptr = tipc_port_lock(ref);
1103 if (!p_ptr)
1104 return -EINVAL;
1105 *importance = (unsigned int)msg_importance(&p_ptr->publ.phdr);
1106 spin_unlock_bh(p_ptr->publ.lock);
1107 return TIPC_OK;
1108 }
1109
1110 int tipc_set_portimportance(u32 ref, unsigned int imp)
1111 {
1112 struct port *p_ptr;
1113
1114 if (imp > TIPC_CRITICAL_IMPORTANCE)
1115 return -EINVAL;
1116
1117 p_ptr = tipc_port_lock(ref);
1118 if (!p_ptr)
1119 return -EINVAL;
1120 msg_set_importance(&p_ptr->publ.phdr, (u32)imp);
1121 spin_unlock_bh(p_ptr->publ.lock);
1122 return TIPC_OK;
1123 }
1124
1125
1126 int tipc_publish(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1127 {
1128 struct port *p_ptr;
1129 struct publication *publ;
1130 u32 key;
1131 int res = -EINVAL;
1132
1133 p_ptr = tipc_port_lock(ref);
1134 dbg("tipc_publ %u, p_ptr = %x, conn = %x, scope = %x, "
1135 "lower = %u, upper = %u\n",
1136 ref, p_ptr, p_ptr->publ.connected, scope, seq->lower, seq->upper);
1137 if (!p_ptr)
1138 return -EINVAL;
1139 if (p_ptr->publ.connected)
1140 goto exit;
1141 if (seq->lower > seq->upper)
1142 goto exit;
1143 if ((scope < TIPC_ZONE_SCOPE) || (scope > TIPC_NODE_SCOPE))
1144 goto exit;
1145 key = ref + p_ptr->pub_count + 1;
1146 if (key == ref) {
1147 res = -EADDRINUSE;
1148 goto exit;
1149 }
1150 publ = tipc_nametbl_publish(seq->type, seq->lower, seq->upper,
1151 scope, p_ptr->publ.ref, key);
1152 if (publ) {
1153 list_add(&publ->pport_list, &p_ptr->publications);
1154 p_ptr->pub_count++;
1155 p_ptr->publ.published = 1;
1156 res = TIPC_OK;
1157 }
1158 exit:
1159 tipc_port_unlock(p_ptr);
1160 return res;
1161 }
1162
1163 int tipc_withdraw(u32 ref, unsigned int scope, struct tipc_name_seq const *seq)
1164 {
1165 struct port *p_ptr;
1166 struct publication *publ;
1167 struct publication *tpubl;
1168 int res = -EINVAL;
1169
1170 p_ptr = tipc_port_lock(ref);
1171 if (!p_ptr)
1172 return -EINVAL;
1173 if (!p_ptr->publ.published)
1174 goto exit;
1175 if (!seq) {
1176 list_for_each_entry_safe(publ, tpubl,
1177 &p_ptr->publications, pport_list) {
1178 tipc_nametbl_withdraw(publ->type, publ->lower,
1179 publ->ref, publ->key);
1180 }
1181 res = TIPC_OK;
1182 } else {
1183 list_for_each_entry_safe(publ, tpubl,
1184 &p_ptr->publications, pport_list) {
1185 if (publ->scope != scope)
1186 continue;
1187 if (publ->type != seq->type)
1188 continue;
1189 if (publ->lower != seq->lower)
1190 continue;
1191 if (publ->upper != seq->upper)
1192 break;
1193 tipc_nametbl_withdraw(publ->type, publ->lower,
1194 publ->ref, publ->key);
1195 res = TIPC_OK;
1196 break;
1197 }
1198 }
1199 if (list_empty(&p_ptr->publications))
1200 p_ptr->publ.published = 0;
1201 exit:
1202 tipc_port_unlock(p_ptr);
1203 return res;
1204 }
1205
1206 int tipc_connect2port(u32 ref, struct tipc_portid const *peer)
1207 {
1208 struct port *p_ptr;
1209 struct tipc_msg *msg;
1210 int res = -EINVAL;
1211
1212 p_ptr = tipc_port_lock(ref);
1213 if (!p_ptr)
1214 return -EINVAL;
1215 if (p_ptr->publ.published || p_ptr->publ.connected)
1216 goto exit;
1217 if (!peer->ref)
1218 goto exit;
1219
1220 msg = &p_ptr->publ.phdr;
1221 msg_set_destnode(msg, peer->node);
1222 msg_set_destport(msg, peer->ref);
1223 msg_set_orignode(msg, tipc_own_addr);
1224 msg_set_origport(msg, p_ptr->publ.ref);
1225 msg_set_transp_seqno(msg, 42);
1226 msg_set_type(msg, TIPC_CONN_MSG);
1227 if (!may_route(peer->node))
1228 msg_set_hdr_sz(msg, SHORT_H_SIZE);
1229 else
1230 msg_set_hdr_sz(msg, LONG_H_SIZE);
1231
1232 p_ptr->probing_interval = PROBING_INTERVAL;
1233 p_ptr->probing_state = CONFIRMED;
1234 p_ptr->publ.connected = 1;
1235 k_start_timer(&p_ptr->timer, p_ptr->probing_interval);
1236
1237 tipc_nodesub_subscribe(&p_ptr->subscription,peer->node,
1238 (void *)(unsigned long)ref,
1239 (net_ev_handler)port_handle_node_down);
1240 res = TIPC_OK;
1241 exit:
1242 tipc_port_unlock(p_ptr);
1243 p_ptr->max_pkt = tipc_link_get_max_pkt(peer->node, ref);
1244 return res;
1245 }
1246
1247 /*
1248 * tipc_disconnect(): Disconnect port form peer.
1249 * This is a node local operation.
1250 */
1251
1252 int tipc_disconnect(u32 ref)
1253 {
1254 struct port *p_ptr;
1255 int res = -ENOTCONN;
1256
1257 p_ptr = tipc_port_lock(ref);
1258 if (!p_ptr)
1259 return -EINVAL;
1260 if (p_ptr->publ.connected) {
1261 p_ptr->publ.connected = 0;
1262 /* let timer expire on it's own to avoid deadlock! */
1263 tipc_nodesub_unsubscribe(&p_ptr->subscription);
1264 res = TIPC_OK;
1265 }
1266 tipc_port_unlock(p_ptr);
1267 return res;
1268 }
1269
1270 /*
1271 * tipc_shutdown(): Send a SHUTDOWN msg to peer and disconnect
1272 */
1273 int tipc_shutdown(u32 ref)
1274 {
1275 struct port *p_ptr;
1276 struct sk_buff *buf = 0;
1277
1278 p_ptr = tipc_port_lock(ref);
1279 if (!p_ptr)
1280 return -EINVAL;
1281
1282 if (p_ptr->publ.connected) {
1283 u32 imp = msg_importance(&p_ptr->publ.phdr);
1284 if (imp < TIPC_CRITICAL_IMPORTANCE)
1285 imp++;
1286 buf = port_build_proto_msg(port_peerport(p_ptr),
1287 port_peernode(p_ptr),
1288 ref,
1289 tipc_own_addr,
1290 imp,
1291 TIPC_CONN_MSG,
1292 TIPC_CONN_SHUTDOWN,
1293 port_out_seqno(p_ptr),
1294 0);
1295 }
1296 tipc_port_unlock(p_ptr);
1297 tipc_net_route_msg(buf);
1298 return tipc_disconnect(ref);
1299 }
1300
1301 int tipc_isconnected(u32 ref, int *isconnected)
1302 {
1303 struct port *p_ptr;
1304
1305 p_ptr = tipc_port_lock(ref);
1306 if (!p_ptr)
1307 return -EINVAL;
1308 *isconnected = p_ptr->publ.connected;
1309 tipc_port_unlock(p_ptr);
1310 return TIPC_OK;
1311 }
1312
1313 int tipc_peer(u32 ref, struct tipc_portid *peer)
1314 {
1315 struct port *p_ptr;
1316 int res;
1317
1318 p_ptr = tipc_port_lock(ref);
1319 if (!p_ptr)
1320 return -EINVAL;
1321 if (p_ptr->publ.connected) {
1322 peer->ref = port_peerport(p_ptr);
1323 peer->node = port_peernode(p_ptr);
1324 res = TIPC_OK;
1325 } else
1326 res = -ENOTCONN;
1327 tipc_port_unlock(p_ptr);
1328 return res;
1329 }
1330
1331 int tipc_ref_valid(u32 ref)
1332 {
1333 /* Works irrespective of type */
1334 return !!tipc_ref_deref(ref);
1335 }
1336
1337
1338 /*
1339 * tipc_port_recv_sections(): Concatenate and deliver sectioned
1340 * message for this node.
1341 */
1342
1343 int tipc_port_recv_sections(struct port *sender, unsigned int num_sect,
1344 struct iovec const *msg_sect)
1345 {
1346 struct sk_buff *buf;
1347 int res;
1348
1349 res = msg_build(&sender->publ.phdr, msg_sect, num_sect,
1350 MAX_MSG_SIZE, !sender->user_port, &buf);
1351 if (likely(buf))
1352 tipc_port_recv_msg(buf);
1353 return res;
1354 }
1355
1356 /**
1357 * tipc_send - send message sections on connection
1358 */
1359
1360 int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect)
1361 {
1362 struct port *p_ptr;
1363 u32 destnode;
1364 int res;
1365
1366 p_ptr = tipc_port_deref(ref);
1367 if (!p_ptr || !p_ptr->publ.connected)
1368 return -EINVAL;
1369
1370 p_ptr->publ.congested = 1;
1371 if (!tipc_port_congested(p_ptr)) {
1372 destnode = port_peernode(p_ptr);
1373 if (likely(destnode != tipc_own_addr))
1374 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1375 destnode);
1376 else
1377 res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1378
1379 if (likely(res != -ELINKCONG)) {
1380 port_incr_out_seqno(p_ptr);
1381 p_ptr->publ.congested = 0;
1382 p_ptr->sent++;
1383 return res;
1384 }
1385 }
1386 if (port_unreliable(p_ptr)) {
1387 p_ptr->publ.congested = 0;
1388 /* Just calculate msg length and return */
1389 return msg_calc_data_size(msg_sect, num_sect);
1390 }
1391 return -ELINKCONG;
1392 }
1393
1394 /**
1395 * tipc_send_buf - send message buffer on connection
1396 */
1397
1398 int tipc_send_buf(u32 ref, struct sk_buff *buf, unsigned int dsz)
1399 {
1400 struct port *p_ptr;
1401 struct tipc_msg *msg;
1402 u32 destnode;
1403 u32 hsz;
1404 u32 sz;
1405 u32 res;
1406
1407 p_ptr = tipc_port_deref(ref);
1408 if (!p_ptr || !p_ptr->publ.connected)
1409 return -EINVAL;
1410
1411 msg = &p_ptr->publ.phdr;
1412 hsz = msg_hdr_sz(msg);
1413 sz = hsz + dsz;
1414 msg_set_size(msg, sz);
1415 if (skb_cow(buf, hsz))
1416 return -ENOMEM;
1417
1418 skb_push(buf, hsz);
1419 memcpy(buf->data, (unchar *)msg, hsz);
1420 destnode = msg_destnode(msg);
1421 p_ptr->publ.congested = 1;
1422 if (!tipc_port_congested(p_ptr)) {
1423 if (likely(destnode != tipc_own_addr))
1424 res = tipc_send_buf_fast(buf, destnode);
1425 else {
1426 tipc_port_recv_msg(buf);
1427 res = sz;
1428 }
1429 if (likely(res != -ELINKCONG)) {
1430 port_incr_out_seqno(p_ptr);
1431 p_ptr->sent++;
1432 p_ptr->publ.congested = 0;
1433 return res;
1434 }
1435 }
1436 if (port_unreliable(p_ptr)) {
1437 p_ptr->publ.congested = 0;
1438 return dsz;
1439 }
1440 return -ELINKCONG;
1441 }
1442
1443 /**
1444 * tipc_forward2name - forward message sections to port name
1445 */
1446
1447 int tipc_forward2name(u32 ref,
1448 struct tipc_name const *name,
1449 u32 domain,
1450 u32 num_sect,
1451 struct iovec const *msg_sect,
1452 struct tipc_portid const *orig,
1453 unsigned int importance)
1454 {
1455 struct port *p_ptr;
1456 struct tipc_msg *msg;
1457 u32 destnode = domain;
1458 u32 destport = 0;
1459 int res;
1460
1461 p_ptr = tipc_port_deref(ref);
1462 if (!p_ptr || p_ptr->publ.connected)
1463 return -EINVAL;
1464
1465 msg = &p_ptr->publ.phdr;
1466 msg_set_type(msg, TIPC_NAMED_MSG);
1467 msg_set_orignode(msg, orig->node);
1468 msg_set_origport(msg, orig->ref);
1469 msg_set_hdr_sz(msg, LONG_H_SIZE);
1470 msg_set_nametype(msg, name->type);
1471 msg_set_nameinst(msg, name->instance);
1472 msg_set_lookup_scope(msg, addr_scope(domain));
1473 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1474 msg_set_importance(msg,importance);
1475 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1476 msg_set_destnode(msg, destnode);
1477 msg_set_destport(msg, destport);
1478
1479 if (likely(destport || destnode)) {
1480 p_ptr->sent++;
1481 if (likely(destnode == tipc_own_addr))
1482 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1483 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect,
1484 destnode);
1485 if (likely(res != -ELINKCONG))
1486 return res;
1487 if (port_unreliable(p_ptr)) {
1488 /* Just calculate msg length and return */
1489 return msg_calc_data_size(msg_sect, num_sect);
1490 }
1491 return -ELINKCONG;
1492 }
1493 return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect,
1494 TIPC_ERR_NO_NAME);
1495 }
1496
1497 /**
1498 * tipc_send2name - send message sections to port name
1499 */
1500
1501 int tipc_send2name(u32 ref,
1502 struct tipc_name const *name,
1503 unsigned int domain,
1504 unsigned int num_sect,
1505 struct iovec const *msg_sect)
1506 {
1507 struct tipc_portid orig;
1508
1509 orig.ref = ref;
1510 orig.node = tipc_own_addr;
1511 return tipc_forward2name(ref, name, domain, num_sect, msg_sect, &orig,
1512 TIPC_PORT_IMPORTANCE);
1513 }
1514
1515 /**
1516 * tipc_forward_buf2name - forward message buffer to port name
1517 */
1518
1519 int tipc_forward_buf2name(u32 ref,
1520 struct tipc_name const *name,
1521 u32 domain,
1522 struct sk_buff *buf,
1523 unsigned int dsz,
1524 struct tipc_portid const *orig,
1525 unsigned int importance)
1526 {
1527 struct port *p_ptr;
1528 struct tipc_msg *msg;
1529 u32 destnode = domain;
1530 u32 destport = 0;
1531 int res;
1532
1533 p_ptr = (struct port *)tipc_ref_deref(ref);
1534 if (!p_ptr || p_ptr->publ.connected)
1535 return -EINVAL;
1536
1537 msg = &p_ptr->publ.phdr;
1538 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1539 msg_set_importance(msg, importance);
1540 msg_set_type(msg, TIPC_NAMED_MSG);
1541 msg_set_orignode(msg, orig->node);
1542 msg_set_origport(msg, orig->ref);
1543 msg_set_nametype(msg, name->type);
1544 msg_set_nameinst(msg, name->instance);
1545 msg_set_lookup_scope(msg, addr_scope(domain));
1546 msg_set_hdr_sz(msg, LONG_H_SIZE);
1547 msg_set_size(msg, LONG_H_SIZE + dsz);
1548 destport = tipc_nametbl_translate(name->type, name->instance, &destnode);
1549 msg_set_destnode(msg, destnode);
1550 msg_set_destport(msg, destport);
1551 msg_dbg(msg, "forw2name ==> ");
1552 if (skb_cow(buf, LONG_H_SIZE))
1553 return -ENOMEM;
1554 skb_push(buf, LONG_H_SIZE);
1555 memcpy(buf->data, (unchar *)msg, LONG_H_SIZE);
1556 msg_dbg(buf_msg(buf),"PREP:");
1557 if (likely(destport || destnode)) {
1558 p_ptr->sent++;
1559 if (destnode == tipc_own_addr)
1560 return tipc_port_recv_msg(buf);
1561 res = tipc_send_buf_fast(buf, destnode);
1562 if (likely(res != -ELINKCONG))
1563 return res;
1564 if (port_unreliable(p_ptr))
1565 return dsz;
1566 return -ELINKCONG;
1567 }
1568 return tipc_reject_msg(buf, TIPC_ERR_NO_NAME);
1569 }
1570
1571 /**
1572 * tipc_send_buf2name - send message buffer to port name
1573 */
1574
1575 int tipc_send_buf2name(u32 ref,
1576 struct tipc_name const *dest,
1577 u32 domain,
1578 struct sk_buff *buf,
1579 unsigned int dsz)
1580 {
1581 struct tipc_portid orig;
1582
1583 orig.ref = ref;
1584 orig.node = tipc_own_addr;
1585 return tipc_forward_buf2name(ref, dest, domain, buf, dsz, &orig,
1586 TIPC_PORT_IMPORTANCE);
1587 }
1588
1589 /**
1590 * tipc_forward2port - forward message sections to port identity
1591 */
1592
1593 int tipc_forward2port(u32 ref,
1594 struct tipc_portid const *dest,
1595 unsigned int num_sect,
1596 struct iovec const *msg_sect,
1597 struct tipc_portid const *orig,
1598 unsigned int importance)
1599 {
1600 struct port *p_ptr;
1601 struct tipc_msg *msg;
1602 int res;
1603
1604 p_ptr = tipc_port_deref(ref);
1605 if (!p_ptr || p_ptr->publ.connected)
1606 return -EINVAL;
1607
1608 msg = &p_ptr->publ.phdr;
1609 msg_set_type(msg, TIPC_DIRECT_MSG);
1610 msg_set_orignode(msg, orig->node);
1611 msg_set_origport(msg, orig->ref);
1612 msg_set_destnode(msg, dest->node);
1613 msg_set_destport(msg, dest->ref);
1614 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1615 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1616 msg_set_importance(msg, importance);
1617 p_ptr->sent++;
1618 if (dest->node == tipc_own_addr)
1619 return tipc_port_recv_sections(p_ptr, num_sect, msg_sect);
1620 res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, dest->node);
1621 if (likely(res != -ELINKCONG))
1622 return res;
1623 if (port_unreliable(p_ptr)) {
1624 /* Just calculate msg length and return */
1625 return msg_calc_data_size(msg_sect, num_sect);
1626 }
1627 return -ELINKCONG;
1628 }
1629
1630 /**
1631 * tipc_send2port - send message sections to port identity
1632 */
1633
1634 int tipc_send2port(u32 ref,
1635 struct tipc_portid const *dest,
1636 unsigned int num_sect,
1637 struct iovec const *msg_sect)
1638 {
1639 struct tipc_portid orig;
1640
1641 orig.ref = ref;
1642 orig.node = tipc_own_addr;
1643 return tipc_forward2port(ref, dest, num_sect, msg_sect, &orig,
1644 TIPC_PORT_IMPORTANCE);
1645 }
1646
1647 /**
1648 * tipc_forward_buf2port - forward message buffer to port identity
1649 */
1650 int tipc_forward_buf2port(u32 ref,
1651 struct tipc_portid const *dest,
1652 struct sk_buff *buf,
1653 unsigned int dsz,
1654 struct tipc_portid const *orig,
1655 unsigned int importance)
1656 {
1657 struct port *p_ptr;
1658 struct tipc_msg *msg;
1659 int res;
1660
1661 p_ptr = (struct port *)tipc_ref_deref(ref);
1662 if (!p_ptr || p_ptr->publ.connected)
1663 return -EINVAL;
1664
1665 msg = &p_ptr->publ.phdr;
1666 msg_set_type(msg, TIPC_DIRECT_MSG);
1667 msg_set_orignode(msg, orig->node);
1668 msg_set_origport(msg, orig->ref);
1669 msg_set_destnode(msg, dest->node);
1670 msg_set_destport(msg, dest->ref);
1671 msg_set_hdr_sz(msg, DIR_MSG_H_SIZE);
1672 if (importance <= TIPC_CRITICAL_IMPORTANCE)
1673 msg_set_importance(msg, importance);
1674 msg_set_size(msg, DIR_MSG_H_SIZE + dsz);
1675 if (skb_cow(buf, DIR_MSG_H_SIZE))
1676 return -ENOMEM;
1677
1678 skb_push(buf, DIR_MSG_H_SIZE);
1679 memcpy(buf->data, (unchar *)msg, DIR_MSG_H_SIZE);
1680 msg_dbg(msg, "buf2port: ");
1681 p_ptr->sent++;
1682 if (dest->node == tipc_own_addr)
1683 return tipc_port_recv_msg(buf);
1684 res = tipc_send_buf_fast(buf, dest->node);
1685 if (likely(res != -ELINKCONG))
1686 return res;
1687 if (port_unreliable(p_ptr))
1688 return dsz;
1689 return -ELINKCONG;
1690 }
1691
1692 /**
1693 * tipc_send_buf2port - send message buffer to port identity
1694 */
1695
1696 int tipc_send_buf2port(u32 ref,
1697 struct tipc_portid const *dest,
1698 struct sk_buff *buf,
1699 unsigned int dsz)
1700 {
1701 struct tipc_portid orig;
1702
1703 orig.ref = ref;
1704 orig.node = tipc_own_addr;
1705 return tipc_forward_buf2port(ref, dest, buf, dsz, &orig,
1706 TIPC_PORT_IMPORTANCE);
1707 }
1708
Verdex Pro support