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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / net / tipc / msg.h
blobb4ba1b4f9ae7fa51aa7c58db8456c1691e2a0839
1 /*
2 * net/tipc/msg.h: Include file for TIPC message header routines
3 *
4 * Copyright (c) 2000-2007, 2014-2017 Ericsson AB
5 * Copyright (c) 2005-2008, 2010-2011, 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 #ifndef _TIPC_MSG_H
38 #define _TIPC_MSG_H
39
40 #include <linux/tipc.h>
41 #include "core.h"
42
43 /*
44 * Constants and routines used to read and write TIPC payload message headers
45 *
46 * Note: Some items are also used with TIPC internal message headers
47 */
48 #define TIPC_VERSION 2
49 struct plist;
50
51 /*
52 * Payload message users are defined in TIPC's public API:
53 * - TIPC_LOW_IMPORTANCE
54 * - TIPC_MEDIUM_IMPORTANCE
55 * - TIPC_HIGH_IMPORTANCE
56 * - TIPC_CRITICAL_IMPORTANCE
57 */
58 #define TIPC_SYSTEM_IMPORTANCE 4
59
60
61 /*
62 * Payload message types
63 */
64 #define TIPC_CONN_MSG 0
65 #define TIPC_MCAST_MSG 1
66 #define TIPC_NAMED_MSG 2
67 #define TIPC_DIRECT_MSG 3
68 #define TIPC_GRP_MEMBER_EVT 4
69 #define TIPC_GRP_BCAST_MSG 5
70 #define TIPC_GRP_MCAST_MSG 6
71 #define TIPC_GRP_UCAST_MSG 7
72
73 /*
74 * Internal message users
75 */
76 #define BCAST_PROTOCOL 5
77 #define MSG_BUNDLER 6
78 #define LINK_PROTOCOL 7
79 #define CONN_MANAGER 8
80 #define GROUP_PROTOCOL 9
81 #define TUNNEL_PROTOCOL 10
82 #define NAME_DISTRIBUTOR 11
83 #define MSG_FRAGMENTER 12
84 #define LINK_CONFIG 13
85 #define SOCK_WAKEUP 14 /* pseudo user */
86 #define TOP_SRV 15 /* pseudo user */
87
88 /*
89 * Message header sizes
90 */
91 #define SHORT_H_SIZE 24 /* In-cluster basic payload message */
92 #define BASIC_H_SIZE 32 /* Basic payload message */
93 #define NAMED_H_SIZE 40 /* Named payload message */
94 #define MCAST_H_SIZE 44 /* Multicast payload message */
95 #define GROUP_H_SIZE 44 /* Group payload message */
96 #define INT_H_SIZE 40 /* Internal messages */
97 #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */
98 #define MAX_H_SIZE 60 /* Largest possible TIPC header size */
99
100 #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
101 #define FB_MTU 3744
102 #define TIPC_MEDIA_INFO_OFFSET 5
103
104 struct tipc_skb_cb {
105 u32 bytes_read;
106 u32 orig_member;
107 struct sk_buff *tail;
108 bool validated;
109 u16 chain_imp;
110 u16 ackers;
111 };
112
113 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
114
115 struct tipc_msg {
116 __be32 hdr[15];
117 };
118
119 static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
120 {
121 return (struct tipc_msg *)skb->data;
122 }
123
124 static inline u32 msg_word(struct tipc_msg *m, u32 pos)
125 {
126 return ntohl(m->hdr[pos]);
127 }
128
129 static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
130 {
131 m->hdr[w] = htonl(val);
132 }
133
134 static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
135 {
136 return (msg_word(m, w) >> pos) & mask;
137 }
138
139 static inline void msg_set_bits(struct tipc_msg *m, u32 w,
140 u32 pos, u32 mask, u32 val)
141 {
142 val = (val & mask) << pos;
143 mask = mask << pos;
144 m->hdr[w] &= ~htonl(mask);
145 m->hdr[w] |= htonl(val);
146 }
147
148 static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
149 {
150 u32 temp = msg->hdr[a];
151
152 msg->hdr[a] = msg->hdr[b];
153 msg->hdr[b] = temp;
154 }
155
156 /*
157 * Word 0
158 */
159 static inline u32 msg_version(struct tipc_msg *m)
160 {
161 return msg_bits(m, 0, 29, 7);
162 }
163
164 static inline void msg_set_version(struct tipc_msg *m)
165 {
166 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
167 }
168
169 static inline u32 msg_user(struct tipc_msg *m)
170 {
171 return msg_bits(m, 0, 25, 0xf);
172 }
173
174 static inline u32 msg_isdata(struct tipc_msg *m)
175 {
176 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
177 }
178
179 static inline void msg_set_user(struct tipc_msg *m, u32 n)
180 {
181 msg_set_bits(m, 0, 25, 0xf, n);
182 }
183
184 static inline u32 msg_hdr_sz(struct tipc_msg *m)
185 {
186 return msg_bits(m, 0, 21, 0xf) << 2;
187 }
188
189 static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
190 {
191 msg_set_bits(m, 0, 21, 0xf, n>>2);
192 }
193
194 static inline u32 msg_size(struct tipc_msg *m)
195 {
196 return msg_bits(m, 0, 0, 0x1ffff);
197 }
198
199 static inline u32 msg_blocks(struct tipc_msg *m)
200 {
201 return (msg_size(m) / 1024) + 1;
202 }
203
204 static inline u32 msg_data_sz(struct tipc_msg *m)
205 {
206 return msg_size(m) - msg_hdr_sz(m);
207 }
208
209 static inline int msg_non_seq(struct tipc_msg *m)
210 {
211 return msg_bits(m, 0, 20, 1);
212 }
213
214 static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
215 {
216 msg_set_bits(m, 0, 20, 1, n);
217 }
218
219 static inline int msg_dest_droppable(struct tipc_msg *m)
220 {
221 return msg_bits(m, 0, 19, 1);
222 }
223
224 static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
225 {
226 msg_set_bits(m, 0, 19, 1, d);
227 }
228
229 static inline int msg_is_keepalive(struct tipc_msg *m)
230 {
231 return msg_bits(m, 0, 19, 1);
232 }
233
234 static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
235 {
236 msg_set_bits(m, 0, 19, 1, d);
237 }
238
239 static inline int msg_src_droppable(struct tipc_msg *m)
240 {
241 return msg_bits(m, 0, 18, 1);
242 }
243
244 static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
245 {
246 msg_set_bits(m, 0, 18, 1, d);
247 }
248
249 static inline void msg_set_size(struct tipc_msg *m, u32 sz)
250 {
251 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
252 }
253
254 static inline unchar *msg_data(struct tipc_msg *m)
255 {
256 return ((unchar *)m) + msg_hdr_sz(m);
257 }
258
259 static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
260 {
261 return (struct tipc_msg *)msg_data(m);
262 }
263
264 /*
265 * Word 1
266 */
267 static inline u32 msg_type(struct tipc_msg *m)
268 {
269 return msg_bits(m, 1, 29, 0x7);
270 }
271
272 static inline void msg_set_type(struct tipc_msg *m, u32 n)
273 {
274 msg_set_bits(m, 1, 29, 0x7, n);
275 }
276
277 static inline int msg_in_group(struct tipc_msg *m)
278 {
279 int mtyp = msg_type(m);
280
281 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
282 }
283
284 static inline bool msg_is_grp_evt(struct tipc_msg *m)
285 {
286 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
287 }
288
289 static inline u32 msg_named(struct tipc_msg *m)
290 {
291 return msg_type(m) == TIPC_NAMED_MSG;
292 }
293
294 static inline u32 msg_mcast(struct tipc_msg *m)
295 {
296 int mtyp = msg_type(m);
297
298 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
299 (mtyp == TIPC_GRP_MCAST_MSG));
300 }
301
302 static inline u32 msg_connected(struct tipc_msg *m)
303 {
304 return msg_type(m) == TIPC_CONN_MSG;
305 }
306
307 static inline u32 msg_errcode(struct tipc_msg *m)
308 {
309 return msg_bits(m, 1, 25, 0xf);
310 }
311
312 static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
313 {
314 msg_set_bits(m, 1, 25, 0xf, err);
315 }
316
317 static inline u32 msg_reroute_cnt(struct tipc_msg *m)
318 {
319 return msg_bits(m, 1, 21, 0xf);
320 }
321
322 static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
323 {
324 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
325 }
326
327 static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
328 {
329 msg_set_bits(m, 1, 21, 0xf, 0);
330 }
331
332 static inline u32 msg_lookup_scope(struct tipc_msg *m)
333 {
334 return msg_bits(m, 1, 19, 0x3);
335 }
336
337 static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
338 {
339 msg_set_bits(m, 1, 19, 0x3, n);
340 }
341
342 static inline u16 msg_bcast_ack(struct tipc_msg *m)
343 {
344 return msg_bits(m, 1, 0, 0xffff);
345 }
346
347 static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
348 {
349 msg_set_bits(m, 1, 0, 0xffff, n);
350 }
351
352
353 /*
354 * Word 2
355 */
356 static inline u16 msg_ack(struct tipc_msg *m)
357 {
358 return msg_bits(m, 2, 16, 0xffff);
359 }
360
361 static inline void msg_set_ack(struct tipc_msg *m, u16 n)
362 {
363 msg_set_bits(m, 2, 16, 0xffff, n);
364 }
365
366 static inline u16 msg_seqno(struct tipc_msg *m)
367 {
368 return msg_bits(m, 2, 0, 0xffff);
369 }
370
371 static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
372 {
373 msg_set_bits(m, 2, 0, 0xffff, n);
374 }
375
376 /*
377 * Words 3-10
378 */
379 static inline u32 msg_importance(struct tipc_msg *m)
380 {
381 int usr = msg_user(m);
382
383 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
384 return usr;
385 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
386 return msg_bits(m, 9, 0, 0x7);
387 return TIPC_SYSTEM_IMPORTANCE;
388 }
389
390 static inline void msg_set_importance(struct tipc_msg *m, u32 i)
391 {
392 int usr = msg_user(m);
393
394 if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)))
395 msg_set_bits(m, 9, 0, 0x7, i);
396 else if (i < TIPC_SYSTEM_IMPORTANCE)
397 msg_set_user(m, i);
398 else
399 pr_warn("Trying to set illegal importance in message\n");
400 }
401
402 static inline u32 msg_prevnode(struct tipc_msg *m)
403 {
404 return msg_word(m, 3);
405 }
406
407 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
408 {
409 msg_set_word(m, 3, a);
410 }
411
412 static inline u32 msg_origport(struct tipc_msg *m)
413 {
414 if (msg_user(m) == MSG_FRAGMENTER)
415 m = msg_get_wrapped(m);
416 return msg_word(m, 4);
417 }
418
419 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
420 {
421 msg_set_word(m, 4, p);
422 }
423
424 static inline u32 msg_destport(struct tipc_msg *m)
425 {
426 return msg_word(m, 5);
427 }
428
429 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
430 {
431 msg_set_word(m, 5, p);
432 }
433
434 static inline u32 msg_mc_netid(struct tipc_msg *m)
435 {
436 return msg_word(m, 5);
437 }
438
439 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
440 {
441 msg_set_word(m, 5, p);
442 }
443
444 static inline int msg_short(struct tipc_msg *m)
445 {
446 return msg_hdr_sz(m) == SHORT_H_SIZE;
447 }
448
449 static inline u32 msg_orignode(struct tipc_msg *m)
450 {
451 if (likely(msg_short(m)))
452 return msg_prevnode(m);
453 return msg_word(m, 6);
454 }
455
456 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
457 {
458 msg_set_word(m, 6, a);
459 }
460
461 static inline u32 msg_destnode(struct tipc_msg *m)
462 {
463 return msg_word(m, 7);
464 }
465
466 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
467 {
468 msg_set_word(m, 7, a);
469 }
470
471 static inline u32 msg_nametype(struct tipc_msg *m)
472 {
473 return msg_word(m, 8);
474 }
475
476 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
477 {
478 msg_set_word(m, 8, n);
479 }
480
481 static inline u32 msg_nameinst(struct tipc_msg *m)
482 {
483 return msg_word(m, 9);
484 }
485
486 static inline u32 msg_namelower(struct tipc_msg *m)
487 {
488 return msg_nameinst(m);
489 }
490
491 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
492 {
493 msg_set_word(m, 9, n);
494 }
495
496 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
497 {
498 msg_set_namelower(m, n);
499 }
500
501 static inline u32 msg_nameupper(struct tipc_msg *m)
502 {
503 return msg_word(m, 10);
504 }
505
506 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
507 {
508 msg_set_word(m, 10, n);
509 }
510
511 /*
512 * Constants and routines used to read and write TIPC internal message headers
513 */
514
515 /*
516 * Connection management protocol message types
517 */
518 #define CONN_PROBE 0
519 #define CONN_PROBE_REPLY 1
520 #define CONN_ACK 2
521
522 /*
523 * Name distributor message types
524 */
525 #define PUBLICATION 0
526 #define WITHDRAWAL 1
527
528 /*
529 * Segmentation message types
530 */
531 #define FIRST_FRAGMENT 0
532 #define FRAGMENT 1
533 #define LAST_FRAGMENT 2
534
535 /*
536 * Link management protocol message types
537 */
538 #define STATE_MSG 0
539 #define RESET_MSG 1
540 #define ACTIVATE_MSG 2
541
542 /*
543 * Changeover tunnel message types
544 */
545 #define SYNCH_MSG 0
546 #define FAILOVER_MSG 1
547
548 /*
549 * Config protocol message types
550 */
551 #define DSC_REQ_MSG 0
552 #define DSC_RESP_MSG 1
553
554 /*
555 * Group protocol message types
556 */
557 #define GRP_JOIN_MSG 0
558 #define GRP_LEAVE_MSG 1
559 #define GRP_ADV_MSG 2
560 #define GRP_ACK_MSG 3
561 #define GRP_RECLAIM_MSG 4
562 #define GRP_REMIT_MSG 5
563
564 /*
565 * Word 1
566 */
567 static inline u32 msg_seq_gap(struct tipc_msg *m)
568 {
569 return msg_bits(m, 1, 16, 0x1fff);
570 }
571
572 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
573 {
574 msg_set_bits(m, 1, 16, 0x1fff, n);
575 }
576
577 static inline u32 msg_node_sig(struct tipc_msg *m)
578 {
579 return msg_bits(m, 1, 0, 0xffff);
580 }
581
582 static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
583 {
584 msg_set_bits(m, 1, 0, 0xffff, n);
585 }
586
587 static inline u32 msg_node_capabilities(struct tipc_msg *m)
588 {
589 return msg_bits(m, 1, 15, 0x1fff);
590 }
591
592 static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
593 {
594 msg_set_bits(m, 1, 15, 0x1fff, n);
595 }
596
597 /*
598 * Word 2
599 */
600 static inline u32 msg_dest_domain(struct tipc_msg *m)
601 {
602 return msg_word(m, 2);
603 }
604
605 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
606 {
607 msg_set_word(m, 2, n);
608 }
609
610 static inline u32 msg_bcgap_after(struct tipc_msg *m)
611 {
612 return msg_bits(m, 2, 16, 0xffff);
613 }
614
615 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
616 {
617 msg_set_bits(m, 2, 16, 0xffff, n);
618 }
619
620 static inline u32 msg_bcgap_to(struct tipc_msg *m)
621 {
622 return msg_bits(m, 2, 0, 0xffff);
623 }
624
625 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
626 {
627 msg_set_bits(m, 2, 0, 0xffff, n);
628 }
629
630
631 /*
632 * Word 4
633 */
634 static inline u32 msg_last_bcast(struct tipc_msg *m)
635 {
636 return msg_bits(m, 4, 16, 0xffff);
637 }
638
639 static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
640 {
641 return msg_last_bcast(m) + 1;
642 }
643
644 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
645 {
646 msg_set_bits(m, 4, 16, 0xffff, n);
647 }
648
649 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
650 {
651 msg_set_bits(m, 4, 16, 0xffff, n);
652 }
653
654
655 static inline u16 msg_next_sent(struct tipc_msg *m)
656 {
657 return msg_bits(m, 4, 0, 0xffff);
658 }
659
660 static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
661 {
662 msg_set_bits(m, 4, 0, 0xffff, n);
663 }
664
665 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
666 {
667 msg_set_bits(m, 4, 0, 0xffff, n);
668 }
669
670 static inline u32 msg_bc_netid(struct tipc_msg *m)
671 {
672 return msg_word(m, 4);
673 }
674
675 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
676 {
677 msg_set_word(m, 4, id);
678 }
679
680 static inline u32 msg_link_selector(struct tipc_msg *m)
681 {
682 if (msg_user(m) == MSG_FRAGMENTER)
683 m = (void *)msg_data(m);
684 return msg_bits(m, 4, 0, 1);
685 }
686
687 /*
688 * Word 5
689 */
690 static inline u16 msg_session(struct tipc_msg *m)
691 {
692 return msg_bits(m, 5, 16, 0xffff);
693 }
694
695 static inline void msg_set_session(struct tipc_msg *m, u16 n)
696 {
697 msg_set_bits(m, 5, 16, 0xffff, n);
698 }
699
700 static inline u32 msg_probe(struct tipc_msg *m)
701 {
702 return msg_bits(m, 5, 0, 1);
703 }
704
705 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
706 {
707 msg_set_bits(m, 5, 0, 1, val);
708 }
709
710 static inline char msg_net_plane(struct tipc_msg *m)
711 {
712 return msg_bits(m, 5, 1, 7) + 'A';
713 }
714
715 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
716 {
717 msg_set_bits(m, 5, 1, 7, (n - 'A'));
718 }
719
720 static inline u32 msg_linkprio(struct tipc_msg *m)
721 {
722 return msg_bits(m, 5, 4, 0x1f);
723 }
724
725 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
726 {
727 msg_set_bits(m, 5, 4, 0x1f, n);
728 }
729
730 static inline u32 msg_bearer_id(struct tipc_msg *m)
731 {
732 return msg_bits(m, 5, 9, 0x7);
733 }
734
735 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
736 {
737 msg_set_bits(m, 5, 9, 0x7, n);
738 }
739
740 static inline u32 msg_redundant_link(struct tipc_msg *m)
741 {
742 return msg_bits(m, 5, 12, 0x1);
743 }
744
745 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
746 {
747 msg_set_bits(m, 5, 12, 0x1, r);
748 }
749
750 static inline u32 msg_peer_stopping(struct tipc_msg *m)
751 {
752 return msg_bits(m, 5, 13, 0x1);
753 }
754
755 static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
756 {
757 msg_set_bits(m, 5, 13, 0x1, s);
758 }
759
760 static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
761 {
762 switch (msg_user(m)) {
763 case BCAST_PROTOCOL:
764 case NAME_DISTRIBUTOR:
765 case LINK_PROTOCOL:
766 return msg_bits(m, 5, 14, 0x1);
767 default:
768 return false;
769 }
770 }
771
772 static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
773 {
774 msg_set_bits(m, 5, 14, 0x1, invalid);
775 }
776
777 static inline char *msg_media_addr(struct tipc_msg *m)
778 {
779 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
780 }
781
782 static inline u32 msg_bc_gap(struct tipc_msg *m)
783 {
784 return msg_bits(m, 8, 0, 0x3ff);
785 }
786
787 static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
788 {
789 msg_set_bits(m, 8, 0, 0x3ff, n);
790 }
791
792 /*
793 * Word 9
794 */
795 static inline u16 msg_msgcnt(struct tipc_msg *m)
796 {
797 return msg_bits(m, 9, 16, 0xffff);
798 }
799
800 static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
801 {
802 msg_set_bits(m, 9, 16, 0xffff, n);
803 }
804
805 static inline u32 msg_conn_ack(struct tipc_msg *m)
806 {
807 return msg_bits(m, 9, 16, 0xffff);
808 }
809
810 static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
811 {
812 msg_set_bits(m, 9, 16, 0xffff, n);
813 }
814
815 static inline u16 msg_adv_win(struct tipc_msg *m)
816 {
817 return msg_bits(m, 9, 0, 0xffff);
818 }
819
820 static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
821 {
822 msg_set_bits(m, 9, 0, 0xffff, n);
823 }
824
825 static inline u32 msg_max_pkt(struct tipc_msg *m)
826 {
827 return msg_bits(m, 9, 16, 0xffff) * 4;
828 }
829
830 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
831 {
832 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
833 }
834
835 static inline u32 msg_link_tolerance(struct tipc_msg *m)
836 {
837 return msg_bits(m, 9, 0, 0xffff);
838 }
839
840 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
841 {
842 msg_set_bits(m, 9, 0, 0xffff, n);
843 }
844
845 static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
846 {
847 return msg_bits(m, 9, 16, 0xffff);
848 }
849
850 static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
851 {
852 msg_set_bits(m, 9, 16, 0xffff, n);
853 }
854
855 static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
856 {
857 return msg_bits(m, 9, 16, 0xffff);
858 }
859
860 static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
861 {
862 msg_set_bits(m, 9, 16, 0xffff, n);
863 }
864
865 static inline u16 msg_grp_remitted(struct tipc_msg *m)
866 {
867 return msg_bits(m, 9, 16, 0xffff);
868 }
869
870 static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
871 {
872 msg_set_bits(m, 9, 16, 0xffff, n);
873 }
874
875 /* Word 10
876 */
877 static inline u16 msg_grp_evt(struct tipc_msg *m)
878 {
879 return msg_bits(m, 10, 0, 0x3);
880 }
881
882 static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
883 {
884 msg_set_bits(m, 10, 0, 0x3, n);
885 }
886
887 static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
888 {
889 return msg_bits(m, 10, 0, 0x1);
890 }
891
892 static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
893 {
894 msg_set_bits(m, 10, 0, 0x1, n);
895 }
896
897 static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
898 {
899 return msg_bits(m, 10, 16, 0xffff);
900 }
901
902 static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
903 {
904 msg_set_bits(m, 10, 16, 0xffff, n);
905 }
906
907 static inline bool msg_peer_link_is_up(struct tipc_msg *m)
908 {
909 if (likely(msg_user(m) != LINK_PROTOCOL))
910 return true;
911 if (msg_type(m) == STATE_MSG)
912 return true;
913 return false;
914 }
915
916 static inline bool msg_peer_node_is_up(struct tipc_msg *m)
917 {
918 if (msg_peer_link_is_up(m))
919 return true;
920 return msg_redundant_link(m);
921 }
922
923 static inline bool msg_is_reset(struct tipc_msg *hdr)
924 {
925 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
926 }
927
928 struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
929 bool tipc_msg_validate(struct sk_buff **_skb);
930 bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
931 void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
932 struct sk_buff_head *xmitq);
933 void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
934 u32 hsize, u32 destnode);
935 struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
936 uint data_sz, u32 dnode, u32 onode,
937 u32 dport, u32 oport, int errcode);
938 int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
939 bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu);
940 bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg,
941 u32 mtu, u32 dnode);
942 bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
943 int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
944 int offset, int dsz, int mtu, struct sk_buff_head *list);
945 bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
946 bool tipc_msg_assemble(struct sk_buff_head *list);
947 bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
948 bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
949 struct sk_buff_head *cpy);
950 void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
951 struct sk_buff *skb);
952
953 static inline u16 buf_seqno(struct sk_buff *skb)
954 {
955 return msg_seqno(buf_msg(skb));
956 }
957
958 static inline int buf_roundup_len(struct sk_buff *skb)
959 {
960 return (skb->len / 1024 + 1) * 1024;
961 }
962
963 /* tipc_skb_peek(): peek and reserve first buffer in list
964 * @list: list to be peeked in
965 * Returns pointer to first buffer in list, if any
966 */
967 static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
968 spinlock_t *lock)
969 {
970 struct sk_buff *skb;
971
972 spin_lock_bh(lock);
973 skb = skb_peek(list);
974 if (skb)
975 skb_get(skb);
976 spin_unlock_bh(lock);
977 return skb;
978 }
979
980 /* tipc_skb_peek_port(): find a destination port, ignoring all destinations
981 * up to and including 'filter'.
982 * Note: ignoring previously tried destinations minimizes the risk of
983 * contention on the socket lock
984 * @list: list to be peeked in
985 * @filter: last destination to be ignored from search
986 * Returns a destination port number, of applicable.
987 */
988 static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
989 {
990 struct sk_buff *skb;
991 u32 dport = 0;
992 bool ignore = true;
993
994 spin_lock_bh(&list->lock);
995 skb_queue_walk(list, skb) {
996 dport = msg_destport(buf_msg(skb));
997 if (!filter || skb_queue_is_last(list, skb))
998 break;
999 if (dport == filter)
1000 ignore = false;
1001 else if (!ignore)
1002 break;
1003 }
1004 spin_unlock_bh(&list->lock);
1005 return dport;
1006 }
1007
1008 /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1009 * @list: list to be unlinked from
1010 * @dport: selection criteria for buffer to unlink
1011 */
1012 static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1013 u32 dport)
1014 {
1015 struct sk_buff *_skb, *tmp, *skb = NULL;
1016
1017 spin_lock_bh(&list->lock);
1018 skb_queue_walk_safe(list, _skb, tmp) {
1019 if (msg_destport(buf_msg(_skb)) == dport) {
1020 __skb_unlink(_skb, list);
1021 skb = _skb;
1022 break;
1023 }
1024 }
1025 spin_unlock_bh(&list->lock);
1026 return skb;
1027 }
1028
1029 /* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1030 * @list: the new list to append. Not lock protected
1031 * @head: target list. Lock protected.
1032 */
1033 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1034 struct sk_buff_head *head)
1035 {
1036 spin_lock_bh(&head->lock);
1037 skb_queue_splice_tail(list, head);
1038 spin_unlock_bh(&head->lock);
1039 }
1040
1041 /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1042 * @list: the new list to add. Lock protected. Will be reinitialized
1043 * @head: target list. Lock protected.
1044 */
1045 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1046 struct sk_buff_head *head)
1047 {
1048 struct sk_buff_head tmp;
1049
1050 __skb_queue_head_init(&tmp);
1051
1052 spin_lock_bh(&list->lock);
1053 skb_queue_splice_tail_init(list, &tmp);
1054 spin_unlock_bh(&list->lock);
1055 tipc_skb_queue_splice_tail(&tmp, head);
1056 }
1057
1058 #endif
CRIS linux kernel tree