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1/*
2 * net/tipc/msg.h: Include file for TIPC message header routines
3 *
4 * Copyright (c) 2000-2007, 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 "bearer.h"
41
42/*
43 * Constants and routines used to read and write TIPC payload message headers
44 *
45 * Note: Some items are also used with TIPC internal message headers
46 */
47
48#define TIPC_VERSION 2
49
50/*
51 * Payload message users are defined in TIPC's public API:
52 * - TIPC_LOW_IMPORTANCE
53 * - TIPC_MEDIUM_IMPORTANCE
54 * - TIPC_HIGH_IMPORTANCE
55 * - TIPC_CRITICAL_IMPORTANCE
56 */
57
58/*
59 * Payload message types
60 */
61
62#define TIPC_CONN_MSG 0
63#define TIPC_MCAST_MSG 1
64#define TIPC_NAMED_MSG 2
65#define TIPC_DIRECT_MSG 3
66
67/*
68 * Message header sizes
69 */
70
71#define SHORT_H_SIZE 24 /* In-cluster basic payload message */
72#define BASIC_H_SIZE 32 /* Basic payload message */
73#define NAMED_H_SIZE 40 /* Named payload message */
74#define MCAST_H_SIZE 44 /* Multicast payload message */
75#define INT_H_SIZE 40 /* Internal messages */
76#define MIN_H_SIZE 24 /* Smallest legal TIPC header size */
77#define MAX_H_SIZE 60 /* Largest possible TIPC header size */
78
79#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
80
81
82struct tipc_msg {
83 __be32 hdr[15];
84};
85
86
87static inline u32 msg_word(struct tipc_msg *m, u32 pos)
88{
89 return ntohl(m->hdr[pos]);
90}
91
92static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
93{
94 m->hdr[w] = htonl(val);
95}
96
97static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
98{
99 return (msg_word(m, w) >> pos) & mask;
100}
101
102static inline void msg_set_bits(struct tipc_msg *m, u32 w,
103 u32 pos, u32 mask, u32 val)
104{
105 val = (val & mask) << pos;
106 mask = mask << pos;
107 m->hdr[w] &= ~htonl(mask);
108 m->hdr[w] |= htonl(val);
109}
110
111static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
112{
113 u32 temp = msg->hdr[a];
114
115 msg->hdr[a] = msg->hdr[b];
116 msg->hdr[b] = temp;
117}
118
119/*
120 * Word 0
121 */
122
123static inline u32 msg_version(struct tipc_msg *m)
124{
125 return msg_bits(m, 0, 29, 7);
126}
127
128static inline void msg_set_version(struct tipc_msg *m)
129{
130 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
131}
132
133static inline u32 msg_user(struct tipc_msg *m)
134{
135 return msg_bits(m, 0, 25, 0xf);
136}
137
138static inline u32 msg_isdata(struct tipc_msg *m)
139{
140 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
141}
142
143static inline void msg_set_user(struct tipc_msg *m, u32 n)
144{
145 msg_set_bits(m, 0, 25, 0xf, n);
146}
147
148static inline u32 msg_importance(struct tipc_msg *m)
149{
150 return msg_bits(m, 0, 25, 0xf);
151}
152
153static inline void msg_set_importance(struct tipc_msg *m, u32 i)
154{
155 msg_set_user(m, i);
156}
157
158static inline u32 msg_hdr_sz(struct tipc_msg *m)
159{
160 return msg_bits(m, 0, 21, 0xf) << 2;
161}
162
163static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
164{
165 msg_set_bits(m, 0, 21, 0xf, n>>2);
166}
167
168static inline u32 msg_size(struct tipc_msg *m)
169{
170 return msg_bits(m, 0, 0, 0x1ffff);
171}
172
173static inline u32 msg_data_sz(struct tipc_msg *m)
174{
175 return msg_size(m) - msg_hdr_sz(m);
176}
177
178static inline int msg_non_seq(struct tipc_msg *m)
179{
180 return msg_bits(m, 0, 20, 1);
181}
182
183static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
184{
185 msg_set_bits(m, 0, 20, 1, n);
186}
187
188static inline int msg_dest_droppable(struct tipc_msg *m)
189{
190 return msg_bits(m, 0, 19, 1);
191}
192
193static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
194{
195 msg_set_bits(m, 0, 19, 1, d);
196}
197
198static inline int msg_src_droppable(struct tipc_msg *m)
199{
200 return msg_bits(m, 0, 18, 1);
201}
202
203static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
204{
205 msg_set_bits(m, 0, 18, 1, d);
206}
207
208static inline void msg_set_size(struct tipc_msg *m, u32 sz)
209{
210 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
211}
212
213
214/*
215 * Word 1
216 */
217
218static inline u32 msg_type(struct tipc_msg *m)
219{
220 return msg_bits(m, 1, 29, 0x7);
221}
222
223static inline void msg_set_type(struct tipc_msg *m, u32 n)
224{
225 msg_set_bits(m, 1, 29, 0x7, n);
226}
227
228static inline u32 msg_named(struct tipc_msg *m)
229{
230 return msg_type(m) == TIPC_NAMED_MSG;
231}
232
233static inline u32 msg_mcast(struct tipc_msg *m)
234{
235 return msg_type(m) == TIPC_MCAST_MSG;
236}
237
238static inline u32 msg_connected(struct tipc_msg *m)
239{
240 return msg_type(m) == TIPC_CONN_MSG;
241}
242
243static inline u32 msg_errcode(struct tipc_msg *m)
244{
245 return msg_bits(m, 1, 25, 0xf);
246}
247
248static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
249{
250 msg_set_bits(m, 1, 25, 0xf, err);
251}
252
253static inline u32 msg_reroute_cnt(struct tipc_msg *m)
254{
255 return msg_bits(m, 1, 21, 0xf);
256}
257
258static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
259{
260 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
261}
262
263static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
264{
265 msg_set_bits(m, 1, 21, 0xf, 0);
266}
267
268static inline u32 msg_lookup_scope(struct tipc_msg *m)
269{
270 return msg_bits(m, 1, 19, 0x3);
271}
272
273static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
274{
275 msg_set_bits(m, 1, 19, 0x3, n);
276}
277
278static inline u32 msg_bcast_ack(struct tipc_msg *m)
279{
280 return msg_bits(m, 1, 0, 0xffff);
281}
282
283static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n)
284{
285 msg_set_bits(m, 1, 0, 0xffff, n);
286}
287
288
289/*
290 * Word 2
291 */
292
293static inline u32 msg_ack(struct tipc_msg *m)
294{
295 return msg_bits(m, 2, 16, 0xffff);
296}
297
298static inline void msg_set_ack(struct tipc_msg *m, u32 n)
299{
300 msg_set_bits(m, 2, 16, 0xffff, n);
301}
302
303static inline u32 msg_seqno(struct tipc_msg *m)
304{
305 return msg_bits(m, 2, 0, 0xffff);
306}
307
308static inline void msg_set_seqno(struct tipc_msg *m, u32 n)
309{
310 msg_set_bits(m, 2, 0, 0xffff, n);
311}
312
313/*
314 * Words 3-10
315 */
316
317
318static inline u32 msg_prevnode(struct tipc_msg *m)
319{
320 return msg_word(m, 3);
321}
322
323static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
324{
325 msg_set_word(m, 3, a);
326}
327
328static inline u32 msg_origport(struct tipc_msg *m)
329{
330 return msg_word(m, 4);
331}
332
333static inline void msg_set_origport(struct tipc_msg *m, u32 p)
334{
335 msg_set_word(m, 4, p);
336}
337
338static inline u32 msg_destport(struct tipc_msg *m)
339{
340 return msg_word(m, 5);
341}
342
343static inline void msg_set_destport(struct tipc_msg *m, u32 p)
344{
345 msg_set_word(m, 5, p);
346}
347
348static inline u32 msg_mc_netid(struct tipc_msg *m)
349{
350 return msg_word(m, 5);
351}
352
353static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
354{
355 msg_set_word(m, 5, p);
356}
357
358static inline int msg_short(struct tipc_msg *m)
359{
360 return msg_hdr_sz(m) == SHORT_H_SIZE;
361}
362
363static inline u32 msg_orignode(struct tipc_msg *m)
364{
365 if (likely(msg_short(m)))
366 return msg_prevnode(m);
367 return msg_word(m, 6);
368}
369
370static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
371{
372 msg_set_word(m, 6, a);
373}
374
375static inline u32 msg_destnode(struct tipc_msg *m)
376{
377 return msg_word(m, 7);
378}
379
380static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
381{
382 msg_set_word(m, 7, a);
383}
384
385static inline int msg_is_dest(struct tipc_msg *m, u32 d)
386{
387 return msg_short(m) || (msg_destnode(m) == d);
388}
389
390static inline u32 msg_nametype(struct tipc_msg *m)
391{
392 return msg_word(m, 8);
393}
394
395static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
396{
397 msg_set_word(m, 8, n);
398}
399
400static inline u32 msg_nameinst(struct tipc_msg *m)
401{
402 return msg_word(m, 9);
403}
404
405static inline u32 msg_namelower(struct tipc_msg *m)
406{
407 return msg_nameinst(m);
408}
409
410static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
411{
412 msg_set_word(m, 9, n);
413}
414
415static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
416{
417 msg_set_namelower(m, n);
418}
419
420static inline u32 msg_nameupper(struct tipc_msg *m)
421{
422 return msg_word(m, 10);
423}
424
425static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
426{
427 msg_set_word(m, 10, n);
428}
429
430static inline unchar *msg_data(struct tipc_msg *m)
431{
432 return ((unchar *)m) + msg_hdr_sz(m);
433}
434
435static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
436{
437 return (struct tipc_msg *)msg_data(m);
438}
439
440
441/*
442 * Constants and routines used to read and write TIPC internal message headers
443 */
444
445/*
446 * Internal message users
447 */
448
449#define BCAST_PROTOCOL 5
450#define MSG_BUNDLER 6
451#define LINK_PROTOCOL 7
452#define CONN_MANAGER 8
453#define ROUTE_DISTRIBUTOR 9 /* obsoleted */
454#define CHANGEOVER_PROTOCOL 10
455#define NAME_DISTRIBUTOR 11
456#define MSG_FRAGMENTER 12
457#define LINK_CONFIG 13
458
459/*
460 * Connection management protocol message types
461 */
462
463#define CONN_PROBE 0
464#define CONN_PROBE_REPLY 1
465#define CONN_ACK 2
466
467/*
468 * Name distributor message types
469 */
470
471#define PUBLICATION 0
472#define WITHDRAWAL 1
473
474/*
475 * Segmentation message types
476 */
477
478#define FIRST_FRAGMENT 0
479#define FRAGMENT 1
480#define LAST_FRAGMENT 2
481
482/*
483 * Link management protocol message types
484 */
485
486#define STATE_MSG 0
487#define RESET_MSG 1
488#define ACTIVATE_MSG 2
489
490/*
491 * Changeover tunnel message types
492 */
493#define DUPLICATE_MSG 0
494#define ORIGINAL_MSG 1
495
496/*
497 * Config protocol message types
498 */
499
500#define DSC_REQ_MSG 0
501#define DSC_RESP_MSG 1
502
503
504/*
505 * Word 1
506 */
507
508static inline u32 msg_seq_gap(struct tipc_msg *m)
509{
510 return msg_bits(m, 1, 16, 0x1fff);
511}
512
513static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
514{
515 msg_set_bits(m, 1, 16, 0x1fff, n);
516}
517
518
519/*
520 * Word 2
521 */
522
523static inline u32 msg_dest_domain(struct tipc_msg *m)
524{
525 return msg_word(m, 2);
526}
527
528static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
529{
530 msg_set_word(m, 2, n);
531}
532
533static inline u32 msg_bcgap_after(struct tipc_msg *m)
534{
535 return msg_bits(m, 2, 16, 0xffff);
536}
537
538static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
539{
540 msg_set_bits(m, 2, 16, 0xffff, n);
541}
542
543static inline u32 msg_bcgap_to(struct tipc_msg *m)
544{
545 return msg_bits(m, 2, 0, 0xffff);
546}
547
548static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
549{
550 msg_set_bits(m, 2, 0, 0xffff, n);
551}
552
553
554/*
555 * Word 4
556 */
557
558static inline u32 msg_last_bcast(struct tipc_msg *m)
559{
560 return msg_bits(m, 4, 16, 0xffff);
561}
562
563static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
564{
565 msg_set_bits(m, 4, 16, 0xffff, n);
566}
567
568
569static inline u32 msg_fragm_no(struct tipc_msg *m)
570{
571 return msg_bits(m, 4, 16, 0xffff);
572}
573
574static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
575{
576 msg_set_bits(m, 4, 16, 0xffff, n);
577}
578
579
580static inline u32 msg_next_sent(struct tipc_msg *m)
581{
582 return msg_bits(m, 4, 0, 0xffff);
583}
584
585static inline void msg_set_next_sent(struct tipc_msg *m, u32 n)
586{
587 msg_set_bits(m, 4, 0, 0xffff, n);
588}
589
590
591static inline u32 msg_long_msgno(struct tipc_msg *m)
592{
593 return msg_bits(m, 4, 0, 0xffff);
594}
595
596static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
597{
598 msg_set_bits(m, 4, 0, 0xffff, n);
599}
600
601static inline u32 msg_bc_netid(struct tipc_msg *m)
602{
603 return msg_word(m, 4);
604}
605
606static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
607{
608 msg_set_word(m, 4, id);
609}
610
611static inline u32 msg_link_selector(struct tipc_msg *m)
612{
613 return msg_bits(m, 4, 0, 1);
614}
615
616static inline void msg_set_link_selector(struct tipc_msg *m, u32 n)
617{
618 msg_set_bits(m, 4, 0, 1, n);
619}
620
621/*
622 * Word 5
623 */
624
625static inline u32 msg_session(struct tipc_msg *m)
626{
627 return msg_bits(m, 5, 16, 0xffff);
628}
629
630static inline void msg_set_session(struct tipc_msg *m, u32 n)
631{
632 msg_set_bits(m, 5, 16, 0xffff, n);
633}
634
635static inline u32 msg_probe(struct tipc_msg *m)
636{
637 return msg_bits(m, 5, 0, 1);
638}
639
640static inline void msg_set_probe(struct tipc_msg *m, u32 val)
641{
642 msg_set_bits(m, 5, 0, 1, val);
643}
644
645static inline char msg_net_plane(struct tipc_msg *m)
646{
647 return msg_bits(m, 5, 1, 7) + 'A';
648}
649
650static inline void msg_set_net_plane(struct tipc_msg *m, char n)
651{
652 msg_set_bits(m, 5, 1, 7, (n - 'A'));
653}
654
655static inline u32 msg_linkprio(struct tipc_msg *m)
656{
657 return msg_bits(m, 5, 4, 0x1f);
658}
659
660static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
661{
662 msg_set_bits(m, 5, 4, 0x1f, n);
663}
664
665static inline u32 msg_bearer_id(struct tipc_msg *m)
666{
667 return msg_bits(m, 5, 9, 0x7);
668}
669
670static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
671{
672 msg_set_bits(m, 5, 9, 0x7, n);
673}
674
675static inline u32 msg_redundant_link(struct tipc_msg *m)
676{
677 return msg_bits(m, 5, 12, 0x1);
678}
679
680static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
681{
682 msg_set_bits(m, 5, 12, 0x1, r);
683}
684
685
686/*
687 * Word 9
688 */
689
690static inline u32 msg_msgcnt(struct tipc_msg *m)
691{
692 return msg_bits(m, 9, 16, 0xffff);
693}
694
695static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n)
696{
697 msg_set_bits(m, 9, 16, 0xffff, n);
698}
699
700static inline u32 msg_bcast_tag(struct tipc_msg *m)
701{
702 return msg_bits(m, 9, 16, 0xffff);
703}
704
705static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n)
706{
707 msg_set_bits(m, 9, 16, 0xffff, n);
708}
709
710static inline u32 msg_max_pkt(struct tipc_msg *m)
711{
712 return msg_bits(m, 9, 16, 0xffff) * 4;
713}
714
715static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
716{
717 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
718}
719
720static inline u32 msg_link_tolerance(struct tipc_msg *m)
721{
722 return msg_bits(m, 9, 0, 0xffff);
723}
724
725static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
726{
727 msg_set_bits(m, 9, 0, 0xffff, n);
728}
729
730u32 tipc_msg_tot_importance(struct tipc_msg *m);
731void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
732 u32 hsize, u32 destnode);
733int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
734 u32 num_sect, unsigned int total_len,
735 int max_size, int usrmem, struct sk_buff **buf);
736
737static inline void msg_set_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
738{
739 memcpy(&((int *)m)[5], a, sizeof(*a));
740}
741
742static inline void msg_get_media_addr(struct tipc_msg *m, struct tipc_media_addr *a)
743{
744 memcpy(a, &((int *)m)[5], sizeof(*a));
745}
746
747#endif
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
49struct 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
104struct 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
115struct tipc_msg {
116 __be32 hdr[15];
117};
118
119static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
120{
121 return (struct tipc_msg *)skb->data;
122}
123
124static inline u32 msg_word(struct tipc_msg *m, u32 pos)
125{
126 return ntohl(m->hdr[pos]);
127}
128
129static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
130{
131 m->hdr[w] = htonl(val);
132}
133
134static 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
139static 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
148static 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 */
159static inline u32 msg_version(struct tipc_msg *m)
160{
161 return msg_bits(m, 0, 29, 7);
162}
163
164static inline void msg_set_version(struct tipc_msg *m)
165{
166 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
167}
168
169static inline u32 msg_user(struct tipc_msg *m)
170{
171 return msg_bits(m, 0, 25, 0xf);
172}
173
174static inline u32 msg_isdata(struct tipc_msg *m)
175{
176 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
177}
178
179static inline void msg_set_user(struct tipc_msg *m, u32 n)
180{
181 msg_set_bits(m, 0, 25, 0xf, n);
182}
183
184static inline u32 msg_hdr_sz(struct tipc_msg *m)
185{
186 return msg_bits(m, 0, 21, 0xf) << 2;
187}
188
189static 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
194static inline u32 msg_size(struct tipc_msg *m)
195{
196 return msg_bits(m, 0, 0, 0x1ffff);
197}
198
199static inline u32 msg_blocks(struct tipc_msg *m)
200{
201 return (msg_size(m) / 1024) + 1;
202}
203
204static inline u32 msg_data_sz(struct tipc_msg *m)
205{
206 return msg_size(m) - msg_hdr_sz(m);
207}
208
209static inline int msg_non_seq(struct tipc_msg *m)
210{
211 return msg_bits(m, 0, 20, 1);
212}
213
214static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
215{
216 msg_set_bits(m, 0, 20, 1, n);
217}
218
219static inline int msg_dest_droppable(struct tipc_msg *m)
220{
221 return msg_bits(m, 0, 19, 1);
222}
223
224static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
225{
226 msg_set_bits(m, 0, 19, 1, d);
227}
228
229static inline int msg_is_keepalive(struct tipc_msg *m)
230{
231 return msg_bits(m, 0, 19, 1);
232}
233
234static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
235{
236 msg_set_bits(m, 0, 19, 1, d);
237}
238
239static inline int msg_src_droppable(struct tipc_msg *m)
240{
241 return msg_bits(m, 0, 18, 1);
242}
243
244static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
245{
246 msg_set_bits(m, 0, 18, 1, d);
247}
248
249static 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
254static inline unchar *msg_data(struct tipc_msg *m)
255{
256 return ((unchar *)m) + msg_hdr_sz(m);
257}
258
259static 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 */
267static inline u32 msg_type(struct tipc_msg *m)
268{
269 return msg_bits(m, 1, 29, 0x7);
270}
271
272static inline void msg_set_type(struct tipc_msg *m, u32 n)
273{
274 msg_set_bits(m, 1, 29, 0x7, n);
275}
276
277static 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
284static inline bool msg_is_grp_evt(struct tipc_msg *m)
285{
286 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
287}
288
289static inline u32 msg_named(struct tipc_msg *m)
290{
291 return msg_type(m) == TIPC_NAMED_MSG;
292}
293
294static 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
302static inline u32 msg_connected(struct tipc_msg *m)
303{
304 return msg_type(m) == TIPC_CONN_MSG;
305}
306
307static inline u32 msg_errcode(struct tipc_msg *m)
308{
309 return msg_bits(m, 1, 25, 0xf);
310}
311
312static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
313{
314 msg_set_bits(m, 1, 25, 0xf, err);
315}
316
317static inline u32 msg_reroute_cnt(struct tipc_msg *m)
318{
319 return msg_bits(m, 1, 21, 0xf);
320}
321
322static 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
327static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
328{
329 msg_set_bits(m, 1, 21, 0xf, 0);
330}
331
332static inline u32 msg_lookup_scope(struct tipc_msg *m)
333{
334 return msg_bits(m, 1, 19, 0x3);
335}
336
337static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
338{
339 msg_set_bits(m, 1, 19, 0x3, n);
340}
341
342static inline u16 msg_bcast_ack(struct tipc_msg *m)
343{
344 return msg_bits(m, 1, 0, 0xffff);
345}
346
347static 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 */
356static inline u16 msg_ack(struct tipc_msg *m)
357{
358 return msg_bits(m, 2, 16, 0xffff);
359}
360
361static inline void msg_set_ack(struct tipc_msg *m, u16 n)
362{
363 msg_set_bits(m, 2, 16, 0xffff, n);
364}
365
366static inline u16 msg_seqno(struct tipc_msg *m)
367{
368 return msg_bits(m, 2, 0, 0xffff);
369}
370
371static 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 */
379static 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
390static 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
402static inline u32 msg_prevnode(struct tipc_msg *m)
403{
404 return msg_word(m, 3);
405}
406
407static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
408{
409 msg_set_word(m, 3, a);
410}
411
412static 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
419static inline void msg_set_origport(struct tipc_msg *m, u32 p)
420{
421 msg_set_word(m, 4, p);
422}
423
424static inline u32 msg_destport(struct tipc_msg *m)
425{
426 return msg_word(m, 5);
427}
428
429static inline void msg_set_destport(struct tipc_msg *m, u32 p)
430{
431 msg_set_word(m, 5, p);
432}
433
434static inline u32 msg_mc_netid(struct tipc_msg *m)
435{
436 return msg_word(m, 5);
437}
438
439static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
440{
441 msg_set_word(m, 5, p);
442}
443
444static inline int msg_short(struct tipc_msg *m)
445{
446 return msg_hdr_sz(m) == SHORT_H_SIZE;
447}
448
449static 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
456static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
457{
458 msg_set_word(m, 6, a);
459}
460
461static inline u32 msg_destnode(struct tipc_msg *m)
462{
463 return msg_word(m, 7);
464}
465
466static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
467{
468 msg_set_word(m, 7, a);
469}
470
471static inline u32 msg_nametype(struct tipc_msg *m)
472{
473 return msg_word(m, 8);
474}
475
476static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
477{
478 msg_set_word(m, 8, n);
479}
480
481static inline u32 msg_nameinst(struct tipc_msg *m)
482{
483 return msg_word(m, 9);
484}
485
486static inline u32 msg_namelower(struct tipc_msg *m)
487{
488 return msg_nameinst(m);
489}
490
491static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
492{
493 msg_set_word(m, 9, n);
494}
495
496static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
497{
498 msg_set_namelower(m, n);
499}
500
501static inline u32 msg_nameupper(struct tipc_msg *m)
502{
503 return msg_word(m, 10);
504}
505
506static 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#define DSC_TRIAL_MSG 2
554#define DSC_TRIAL_FAIL_MSG 3
555
556/*
557 * Group protocol message types
558 */
559#define GRP_JOIN_MSG 0
560#define GRP_LEAVE_MSG 1
561#define GRP_ADV_MSG 2
562#define GRP_ACK_MSG 3
563#define GRP_RECLAIM_MSG 4
564#define GRP_REMIT_MSG 5
565
566/*
567 * Word 1
568 */
569static inline u32 msg_seq_gap(struct tipc_msg *m)
570{
571 return msg_bits(m, 1, 16, 0x1fff);
572}
573
574static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
575{
576 msg_set_bits(m, 1, 16, 0x1fff, n);
577}
578
579static inline u32 msg_node_sig(struct tipc_msg *m)
580{
581 return msg_bits(m, 1, 0, 0xffff);
582}
583
584static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
585{
586 msg_set_bits(m, 1, 0, 0xffff, n);
587}
588
589static inline u32 msg_node_capabilities(struct tipc_msg *m)
590{
591 return msg_bits(m, 1, 15, 0x1fff);
592}
593
594static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
595{
596 msg_set_bits(m, 1, 15, 0x1fff, n);
597}
598
599/*
600 * Word 2
601 */
602static inline u32 msg_dest_domain(struct tipc_msg *m)
603{
604 return msg_word(m, 2);
605}
606
607static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
608{
609 msg_set_word(m, 2, n);
610}
611
612static inline u32 msg_bcgap_after(struct tipc_msg *m)
613{
614 return msg_bits(m, 2, 16, 0xffff);
615}
616
617static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
618{
619 msg_set_bits(m, 2, 16, 0xffff, n);
620}
621
622static inline u32 msg_bcgap_to(struct tipc_msg *m)
623{
624 return msg_bits(m, 2, 0, 0xffff);
625}
626
627static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
628{
629 msg_set_bits(m, 2, 0, 0xffff, n);
630}
631
632/*
633 * Word 4
634 */
635static inline u32 msg_last_bcast(struct tipc_msg *m)
636{
637 return msg_bits(m, 4, 16, 0xffff);
638}
639
640static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
641{
642 return msg_last_bcast(m) + 1;
643}
644
645static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
646{
647 msg_set_bits(m, 4, 16, 0xffff, n);
648}
649
650static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
651{
652 msg_set_bits(m, 4, 16, 0xffff, n);
653}
654
655
656static inline u16 msg_next_sent(struct tipc_msg *m)
657{
658 return msg_bits(m, 4, 0, 0xffff);
659}
660
661static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
662{
663 msg_set_bits(m, 4, 0, 0xffff, n);
664}
665
666static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
667{
668 msg_set_bits(m, 4, 0, 0xffff, n);
669}
670
671static inline u32 msg_bc_netid(struct tipc_msg *m)
672{
673 return msg_word(m, 4);
674}
675
676static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
677{
678 msg_set_word(m, 4, id);
679}
680
681static inline u32 msg_link_selector(struct tipc_msg *m)
682{
683 if (msg_user(m) == MSG_FRAGMENTER)
684 m = (void *)msg_data(m);
685 return msg_bits(m, 4, 0, 1);
686}
687
688/*
689 * Word 5
690 */
691static inline u16 msg_session(struct tipc_msg *m)
692{
693 return msg_bits(m, 5, 16, 0xffff);
694}
695
696static inline void msg_set_session(struct tipc_msg *m, u16 n)
697{
698 msg_set_bits(m, 5, 16, 0xffff, n);
699}
700
701static inline u32 msg_probe(struct tipc_msg *m)
702{
703 return msg_bits(m, 5, 0, 1);
704}
705
706static inline void msg_set_probe(struct tipc_msg *m, u32 val)
707{
708 msg_set_bits(m, 5, 0, 1, val);
709}
710
711static inline char msg_net_plane(struct tipc_msg *m)
712{
713 return msg_bits(m, 5, 1, 7) + 'A';
714}
715
716static inline void msg_set_net_plane(struct tipc_msg *m, char n)
717{
718 msg_set_bits(m, 5, 1, 7, (n - 'A'));
719}
720
721static inline u32 msg_linkprio(struct tipc_msg *m)
722{
723 return msg_bits(m, 5, 4, 0x1f);
724}
725
726static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
727{
728 msg_set_bits(m, 5, 4, 0x1f, n);
729}
730
731static inline u32 msg_bearer_id(struct tipc_msg *m)
732{
733 return msg_bits(m, 5, 9, 0x7);
734}
735
736static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
737{
738 msg_set_bits(m, 5, 9, 0x7, n);
739}
740
741static inline u32 msg_redundant_link(struct tipc_msg *m)
742{
743 return msg_bits(m, 5, 12, 0x1);
744}
745
746static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
747{
748 msg_set_bits(m, 5, 12, 0x1, r);
749}
750
751static inline u32 msg_peer_stopping(struct tipc_msg *m)
752{
753 return msg_bits(m, 5, 13, 0x1);
754}
755
756static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
757{
758 msg_set_bits(m, 5, 13, 0x1, s);
759}
760
761static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
762{
763 switch (msg_user(m)) {
764 case BCAST_PROTOCOL:
765 case NAME_DISTRIBUTOR:
766 case LINK_PROTOCOL:
767 return msg_bits(m, 5, 14, 0x1);
768 default:
769 return false;
770 }
771}
772
773static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
774{
775 msg_set_bits(m, 5, 14, 0x1, invalid);
776}
777
778static inline char *msg_media_addr(struct tipc_msg *m)
779{
780 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
781}
782
783static inline u32 msg_bc_gap(struct tipc_msg *m)
784{
785 return msg_bits(m, 8, 0, 0x3ff);
786}
787
788static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
789{
790 msg_set_bits(m, 8, 0, 0x3ff, n);
791}
792
793/*
794 * Word 9
795 */
796static inline u16 msg_msgcnt(struct tipc_msg *m)
797{
798 return msg_bits(m, 9, 16, 0xffff);
799}
800
801static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
802{
803 msg_set_bits(m, 9, 16, 0xffff, n);
804}
805
806static inline u32 msg_conn_ack(struct tipc_msg *m)
807{
808 return msg_bits(m, 9, 16, 0xffff);
809}
810
811static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
812{
813 msg_set_bits(m, 9, 16, 0xffff, n);
814}
815
816static inline u16 msg_adv_win(struct tipc_msg *m)
817{
818 return msg_bits(m, 9, 0, 0xffff);
819}
820
821static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
822{
823 msg_set_bits(m, 9, 0, 0xffff, n);
824}
825
826static inline u32 msg_max_pkt(struct tipc_msg *m)
827{
828 return msg_bits(m, 9, 16, 0xffff) * 4;
829}
830
831static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
832{
833 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
834}
835
836static inline u32 msg_link_tolerance(struct tipc_msg *m)
837{
838 return msg_bits(m, 9, 0, 0xffff);
839}
840
841static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
842{
843 msg_set_bits(m, 9, 0, 0xffff, n);
844}
845
846static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
847{
848 return msg_bits(m, 9, 16, 0xffff);
849}
850
851static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
852{
853 msg_set_bits(m, 9, 16, 0xffff, n);
854}
855
856static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
857{
858 return msg_bits(m, 9, 16, 0xffff);
859}
860
861static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
862{
863 msg_set_bits(m, 9, 16, 0xffff, n);
864}
865
866static inline u16 msg_grp_remitted(struct tipc_msg *m)
867{
868 return msg_bits(m, 9, 16, 0xffff);
869}
870
871static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
872{
873 msg_set_bits(m, 9, 16, 0xffff, n);
874}
875
876/* Word 10
877 */
878static inline u16 msg_grp_evt(struct tipc_msg *m)
879{
880 return msg_bits(m, 10, 0, 0x3);
881}
882
883static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
884{
885 msg_set_bits(m, 10, 0, 0x3, n);
886}
887
888static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
889{
890 return msg_bits(m, 10, 0, 0x1);
891}
892
893static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
894{
895 msg_set_bits(m, 10, 0, 0x1, n);
896}
897
898static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
899{
900 return msg_bits(m, 10, 16, 0xffff);
901}
902
903static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
904{
905 msg_set_bits(m, 10, 16, 0xffff, n);
906}
907
908static inline bool msg_peer_link_is_up(struct tipc_msg *m)
909{
910 if (likely(msg_user(m) != LINK_PROTOCOL))
911 return true;
912 if (msg_type(m) == STATE_MSG)
913 return true;
914 return false;
915}
916
917static inline bool msg_peer_node_is_up(struct tipc_msg *m)
918{
919 if (msg_peer_link_is_up(m))
920 return true;
921 return msg_redundant_link(m);
922}
923
924static inline bool msg_is_reset(struct tipc_msg *hdr)
925{
926 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
927}
928
929static inline u32 msg_sugg_node_addr(struct tipc_msg *m)
930{
931 return msg_word(m, 14);
932}
933
934static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n)
935{
936 msg_set_word(m, 14, n);
937}
938
939static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id)
940{
941 memcpy(msg_data(hdr), id, 16);
942}
943
944static inline u8 *msg_node_id(struct tipc_msg *hdr)
945{
946 return (u8 *)msg_data(hdr);
947}
948
949struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
950bool tipc_msg_validate(struct sk_buff **_skb);
951bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
952void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
953 struct sk_buff_head *xmitq);
954void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
955 u32 hsize, u32 destnode);
956struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
957 uint data_sz, u32 dnode, u32 onode,
958 u32 dport, u32 oport, int errcode);
959int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
960bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu);
961bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg,
962 u32 mtu, u32 dnode);
963bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
964int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
965 int offset, int dsz, int mtu, struct sk_buff_head *list);
966bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
967bool tipc_msg_assemble(struct sk_buff_head *list);
968bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
969bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
970 struct sk_buff_head *cpy);
971void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
972 struct sk_buff *skb);
973
974static inline u16 buf_seqno(struct sk_buff *skb)
975{
976 return msg_seqno(buf_msg(skb));
977}
978
979static inline int buf_roundup_len(struct sk_buff *skb)
980{
981 return (skb->len / 1024 + 1) * 1024;
982}
983
984/* tipc_skb_peek(): peek and reserve first buffer in list
985 * @list: list to be peeked in
986 * Returns pointer to first buffer in list, if any
987 */
988static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
989 spinlock_t *lock)
990{
991 struct sk_buff *skb;
992
993 spin_lock_bh(lock);
994 skb = skb_peek(list);
995 if (skb)
996 skb_get(skb);
997 spin_unlock_bh(lock);
998 return skb;
999}
1000
1001/* tipc_skb_peek_port(): find a destination port, ignoring all destinations
1002 * up to and including 'filter'.
1003 * Note: ignoring previously tried destinations minimizes the risk of
1004 * contention on the socket lock
1005 * @list: list to be peeked in
1006 * @filter: last destination to be ignored from search
1007 * Returns a destination port number, of applicable.
1008 */
1009static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
1010{
1011 struct sk_buff *skb;
1012 u32 dport = 0;
1013 bool ignore = true;
1014
1015 spin_lock_bh(&list->lock);
1016 skb_queue_walk(list, skb) {
1017 dport = msg_destport(buf_msg(skb));
1018 if (!filter || skb_queue_is_last(list, skb))
1019 break;
1020 if (dport == filter)
1021 ignore = false;
1022 else if (!ignore)
1023 break;
1024 }
1025 spin_unlock_bh(&list->lock);
1026 return dport;
1027}
1028
1029/* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1030 * @list: list to be unlinked from
1031 * @dport: selection criteria for buffer to unlink
1032 */
1033static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1034 u32 dport)
1035{
1036 struct sk_buff *_skb, *tmp, *skb = NULL;
1037
1038 spin_lock_bh(&list->lock);
1039 skb_queue_walk_safe(list, _skb, tmp) {
1040 if (msg_destport(buf_msg(_skb)) == dport) {
1041 __skb_unlink(_skb, list);
1042 skb = _skb;
1043 break;
1044 }
1045 }
1046 spin_unlock_bh(&list->lock);
1047 return skb;
1048}
1049
1050/* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1051 * @list: the new list to append. Not lock protected
1052 * @head: target list. Lock protected.
1053 */
1054static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1055 struct sk_buff_head *head)
1056{
1057 spin_lock_bh(&head->lock);
1058 skb_queue_splice_tail(list, head);
1059 spin_unlock_bh(&head->lock);
1060}
1061
1062/* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1063 * @list: the new list to add. Lock protected. Will be reinitialized
1064 * @head: target list. Lock protected.
1065 */
1066static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1067 struct sk_buff_head *head)
1068{
1069 struct sk_buff_head tmp;
1070
1071 __skb_queue_head_init(&tmp);
1072
1073 spin_lock_bh(&list->lock);
1074 skb_queue_splice_tail_init(list, &tmp);
1075 spin_unlock_bh(&list->lock);
1076 tipc_skb_queue_splice_tail(&tmp, head);
1077}
1078
1079#endif