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