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Linux 5.7.7
[linux/fpc-iii.git] / net / tipc / msg.h
blob871feadbbc1916adc1de3f78ae921f5aac1e712b
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 union {
106 struct {
107 struct sk_buff *tail;
108 unsigned long nxt_retr;
109 unsigned long retr_stamp;
110 u32 bytes_read;
111 u32 orig_member;
112 u16 chain_imp;
113 u16 ackers;
114 u16 retr_cnt;
115 } __packed;
116 #ifdef CONFIG_TIPC_CRYPTO
117 struct {
118 struct tipc_crypto *rx;
119 struct tipc_aead *last;
120 u8 recurs;
121 } tx_clone_ctx __packed;
122 #endif
123 } __packed;
124 union {
125 struct {
126 u8 validated:1;
127 #ifdef CONFIG_TIPC_CRYPTO
128 u8 encrypted:1;
129 u8 decrypted:1;
130 u8 probe:1;
131 u8 tx_clone_deferred:1;
132 #endif
133 };
134 u8 flags;
135 };
136 u8 reserved;
137 #ifdef CONFIG_TIPC_CRYPTO
138 void *crypto_ctx;
139 #endif
140 } __packed;
141
142 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
143
144 struct tipc_msg {
145 __be32 hdr[15];
146 };
147
148 /* struct tipc_gap_ack - TIPC Gap ACK block
149 * @ack: seqno of the last consecutive packet in link deferdq
150 * @gap: number of gap packets since the last ack
151 *
152 * E.g:
153 * link deferdq: 1 2 3 4 10 11 13 14 15 20
154 * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0>
155 */
156 struct tipc_gap_ack {
157 __be16 ack;
158 __be16 gap;
159 };
160
161 /* struct tipc_gap_ack_blks
162 * @len: actual length of the record
163 * @gack_cnt: number of Gap ACK blocks in the record
164 * @gacks: array of Gap ACK blocks
165 */
166 struct tipc_gap_ack_blks {
167 __be16 len;
168 u8 gack_cnt;
169 u8 reserved;
170 struct tipc_gap_ack gacks[];
171 };
172
173 #define tipc_gap_ack_blks_sz(n) (sizeof(struct tipc_gap_ack_blks) + \
174 sizeof(struct tipc_gap_ack) * (n))
175
176 #define MAX_GAP_ACK_BLKS 32
177 #define MAX_GAP_ACK_BLKS_SZ tipc_gap_ack_blks_sz(MAX_GAP_ACK_BLKS)
178
179 static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
180 {
181 return (struct tipc_msg *)skb->data;
182 }
183
184 static inline u32 msg_word(struct tipc_msg *m, u32 pos)
185 {
186 return ntohl(m->hdr[pos]);
187 }
188
189 static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
190 {
191 m->hdr[w] = htonl(val);
192 }
193
194 static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
195 {
196 return (msg_word(m, w) >> pos) & mask;
197 }
198
199 static inline void msg_set_bits(struct tipc_msg *m, u32 w,
200 u32 pos, u32 mask, u32 val)
201 {
202 val = (val & mask) << pos;
203 mask = mask << pos;
204 m->hdr[w] &= ~htonl(mask);
205 m->hdr[w] |= htonl(val);
206 }
207
208 static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
209 {
210 u32 temp = msg->hdr[a];
211
212 msg->hdr[a] = msg->hdr[b];
213 msg->hdr[b] = temp;
214 }
215
216 /*
217 * Word 0
218 */
219 static inline u32 msg_version(struct tipc_msg *m)
220 {
221 return msg_bits(m, 0, 29, 7);
222 }
223
224 static inline void msg_set_version(struct tipc_msg *m)
225 {
226 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
227 }
228
229 static inline u32 msg_user(struct tipc_msg *m)
230 {
231 return msg_bits(m, 0, 25, 0xf);
232 }
233
234 static inline u32 msg_isdata(struct tipc_msg *m)
235 {
236 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
237 }
238
239 static inline void msg_set_user(struct tipc_msg *m, u32 n)
240 {
241 msg_set_bits(m, 0, 25, 0xf, n);
242 }
243
244 static inline u32 msg_hdr_sz(struct tipc_msg *m)
245 {
246 return msg_bits(m, 0, 21, 0xf) << 2;
247 }
248
249 static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
250 {
251 msg_set_bits(m, 0, 21, 0xf, n>>2);
252 }
253
254 static inline u32 msg_size(struct tipc_msg *m)
255 {
256 return msg_bits(m, 0, 0, 0x1ffff);
257 }
258
259 static inline u32 msg_blocks(struct tipc_msg *m)
260 {
261 return (msg_size(m) / 1024) + 1;
262 }
263
264 static inline u32 msg_data_sz(struct tipc_msg *m)
265 {
266 return msg_size(m) - msg_hdr_sz(m);
267 }
268
269 static inline int msg_non_seq(struct tipc_msg *m)
270 {
271 return msg_bits(m, 0, 20, 1);
272 }
273
274 static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
275 {
276 msg_set_bits(m, 0, 20, 1, n);
277 }
278
279 static inline int msg_is_syn(struct tipc_msg *m)
280 {
281 return msg_bits(m, 0, 17, 1);
282 }
283
284 static inline void msg_set_syn(struct tipc_msg *m, u32 d)
285 {
286 msg_set_bits(m, 0, 17, 1, d);
287 }
288
289 static inline int msg_dest_droppable(struct tipc_msg *m)
290 {
291 return msg_bits(m, 0, 19, 1);
292 }
293
294 static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
295 {
296 msg_set_bits(m, 0, 19, 1, d);
297 }
298
299 static inline int msg_is_keepalive(struct tipc_msg *m)
300 {
301 return msg_bits(m, 0, 19, 1);
302 }
303
304 static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
305 {
306 msg_set_bits(m, 0, 19, 1, d);
307 }
308
309 static inline int msg_src_droppable(struct tipc_msg *m)
310 {
311 return msg_bits(m, 0, 18, 1);
312 }
313
314 static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
315 {
316 msg_set_bits(m, 0, 18, 1, d);
317 }
318
319 static inline int msg_ack_required(struct tipc_msg *m)
320 {
321 return msg_bits(m, 0, 18, 1);
322 }
323
324 static inline void msg_set_ack_required(struct tipc_msg *m, u32 d)
325 {
326 msg_set_bits(m, 0, 18, 1, d);
327 }
328
329 static inline bool msg_is_rcast(struct tipc_msg *m)
330 {
331 return msg_bits(m, 0, 18, 0x1);
332 }
333
334 static inline void msg_set_is_rcast(struct tipc_msg *m, bool d)
335 {
336 msg_set_bits(m, 0, 18, 0x1, d);
337 }
338
339 static inline void msg_set_size(struct tipc_msg *m, u32 sz)
340 {
341 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
342 }
343
344 static inline unchar *msg_data(struct tipc_msg *m)
345 {
346 return ((unchar *)m) + msg_hdr_sz(m);
347 }
348
349 static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m)
350 {
351 return (struct tipc_msg *)msg_data(m);
352 }
353
354 /*
355 * Word 1
356 */
357 static inline u32 msg_type(struct tipc_msg *m)
358 {
359 return msg_bits(m, 1, 29, 0x7);
360 }
361
362 static inline void msg_set_type(struct tipc_msg *m, u32 n)
363 {
364 msg_set_bits(m, 1, 29, 0x7, n);
365 }
366
367 static inline int msg_in_group(struct tipc_msg *m)
368 {
369 int mtyp = msg_type(m);
370
371 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
372 }
373
374 static inline bool msg_is_grp_evt(struct tipc_msg *m)
375 {
376 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
377 }
378
379 static inline u32 msg_named(struct tipc_msg *m)
380 {
381 return msg_type(m) == TIPC_NAMED_MSG;
382 }
383
384 static inline u32 msg_mcast(struct tipc_msg *m)
385 {
386 int mtyp = msg_type(m);
387
388 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
389 (mtyp == TIPC_GRP_MCAST_MSG));
390 }
391
392 static inline u32 msg_connected(struct tipc_msg *m)
393 {
394 return msg_type(m) == TIPC_CONN_MSG;
395 }
396
397 static inline u32 msg_direct(struct tipc_msg *m)
398 {
399 return msg_type(m) == TIPC_DIRECT_MSG;
400 }
401
402 static inline u32 msg_errcode(struct tipc_msg *m)
403 {
404 return msg_bits(m, 1, 25, 0xf);
405 }
406
407 static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
408 {
409 msg_set_bits(m, 1, 25, 0xf, err);
410 }
411
412 static inline u32 msg_reroute_cnt(struct tipc_msg *m)
413 {
414 return msg_bits(m, 1, 21, 0xf);
415 }
416
417 static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
418 {
419 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
420 }
421
422 static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
423 {
424 msg_set_bits(m, 1, 21, 0xf, 0);
425 }
426
427 static inline u32 msg_lookup_scope(struct tipc_msg *m)
428 {
429 return msg_bits(m, 1, 19, 0x3);
430 }
431
432 static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
433 {
434 msg_set_bits(m, 1, 19, 0x3, n);
435 }
436
437 static inline u16 msg_bcast_ack(struct tipc_msg *m)
438 {
439 return msg_bits(m, 1, 0, 0xffff);
440 }
441
442 static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
443 {
444 msg_set_bits(m, 1, 0, 0xffff, n);
445 }
446
447 /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
448 * link peer session number
449 */
450 static inline bool msg_dest_session_valid(struct tipc_msg *m)
451 {
452 return msg_bits(m, 1, 16, 0x1);
453 }
454
455 static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid)
456 {
457 msg_set_bits(m, 1, 16, 0x1, valid);
458 }
459
460 static inline u16 msg_dest_session(struct tipc_msg *m)
461 {
462 return msg_bits(m, 1, 0, 0xffff);
463 }
464
465 static inline void msg_set_dest_session(struct tipc_msg *m, u16 n)
466 {
467 msg_set_bits(m, 1, 0, 0xffff, n);
468 }
469
470 /*
471 * Word 2
472 */
473 static inline u16 msg_ack(struct tipc_msg *m)
474 {
475 return msg_bits(m, 2, 16, 0xffff);
476 }
477
478 static inline void msg_set_ack(struct tipc_msg *m, u16 n)
479 {
480 msg_set_bits(m, 2, 16, 0xffff, n);
481 }
482
483 static inline u16 msg_seqno(struct tipc_msg *m)
484 {
485 return msg_bits(m, 2, 0, 0xffff);
486 }
487
488 static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
489 {
490 msg_set_bits(m, 2, 0, 0xffff, n);
491 }
492
493 /*
494 * Words 3-10
495 */
496 static inline u32 msg_importance(struct tipc_msg *m)
497 {
498 int usr = msg_user(m);
499
500 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
501 return usr;
502 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
503 return msg_bits(m, 9, 0, 0x7);
504 return TIPC_SYSTEM_IMPORTANCE;
505 }
506
507 static inline void msg_set_importance(struct tipc_msg *m, u32 i)
508 {
509 int usr = msg_user(m);
510
511 if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)))
512 msg_set_bits(m, 9, 0, 0x7, i);
513 else if (i < TIPC_SYSTEM_IMPORTANCE)
514 msg_set_user(m, i);
515 else
516 pr_warn("Trying to set illegal importance in message\n");
517 }
518
519 static inline u32 msg_prevnode(struct tipc_msg *m)
520 {
521 return msg_word(m, 3);
522 }
523
524 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
525 {
526 msg_set_word(m, 3, a);
527 }
528
529 static inline u32 msg_origport(struct tipc_msg *m)
530 {
531 if (msg_user(m) == MSG_FRAGMENTER)
532 m = msg_inner_hdr(m);
533 return msg_word(m, 4);
534 }
535
536 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
537 {
538 msg_set_word(m, 4, p);
539 }
540
541 static inline u32 msg_destport(struct tipc_msg *m)
542 {
543 return msg_word(m, 5);
544 }
545
546 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
547 {
548 msg_set_word(m, 5, p);
549 }
550
551 static inline u32 msg_mc_netid(struct tipc_msg *m)
552 {
553 return msg_word(m, 5);
554 }
555
556 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
557 {
558 msg_set_word(m, 5, p);
559 }
560
561 static inline int msg_short(struct tipc_msg *m)
562 {
563 return msg_hdr_sz(m) == SHORT_H_SIZE;
564 }
565
566 static inline u32 msg_orignode(struct tipc_msg *m)
567 {
568 if (likely(msg_short(m)))
569 return msg_prevnode(m);
570 return msg_word(m, 6);
571 }
572
573 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
574 {
575 msg_set_word(m, 6, a);
576 }
577
578 static inline u32 msg_destnode(struct tipc_msg *m)
579 {
580 return msg_word(m, 7);
581 }
582
583 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
584 {
585 msg_set_word(m, 7, a);
586 }
587
588 static inline u32 msg_nametype(struct tipc_msg *m)
589 {
590 return msg_word(m, 8);
591 }
592
593 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
594 {
595 msg_set_word(m, 8, n);
596 }
597
598 static inline u32 msg_nameinst(struct tipc_msg *m)
599 {
600 return msg_word(m, 9);
601 }
602
603 static inline u32 msg_namelower(struct tipc_msg *m)
604 {
605 return msg_nameinst(m);
606 }
607
608 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
609 {
610 msg_set_word(m, 9, n);
611 }
612
613 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
614 {
615 msg_set_namelower(m, n);
616 }
617
618 static inline u32 msg_nameupper(struct tipc_msg *m)
619 {
620 return msg_word(m, 10);
621 }
622
623 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
624 {
625 msg_set_word(m, 10, n);
626 }
627
628 /*
629 * Constants and routines used to read and write TIPC internal message headers
630 */
631
632 /*
633 * Connection management protocol message types
634 */
635 #define CONN_PROBE 0
636 #define CONN_PROBE_REPLY 1
637 #define CONN_ACK 2
638
639 /*
640 * Name distributor message types
641 */
642 #define PUBLICATION 0
643 #define WITHDRAWAL 1
644
645 /*
646 * Segmentation message types
647 */
648 #define FIRST_FRAGMENT 0
649 #define FRAGMENT 1
650 #define LAST_FRAGMENT 2
651
652 /*
653 * Link management protocol message types
654 */
655 #define STATE_MSG 0
656 #define RESET_MSG 1
657 #define ACTIVATE_MSG 2
658
659 /*
660 * Changeover tunnel message types
661 */
662 #define SYNCH_MSG 0
663 #define FAILOVER_MSG 1
664
665 /*
666 * Config protocol message types
667 */
668 #define DSC_REQ_MSG 0
669 #define DSC_RESP_MSG 1
670 #define DSC_TRIAL_MSG 2
671 #define DSC_TRIAL_FAIL_MSG 3
672
673 /*
674 * Group protocol message types
675 */
676 #define GRP_JOIN_MSG 0
677 #define GRP_LEAVE_MSG 1
678 #define GRP_ADV_MSG 2
679 #define GRP_ACK_MSG 3
680 #define GRP_RECLAIM_MSG 4
681 #define GRP_REMIT_MSG 5
682
683 /*
684 * Word 1
685 */
686 static inline u32 msg_seq_gap(struct tipc_msg *m)
687 {
688 return msg_bits(m, 1, 16, 0x1fff);
689 }
690
691 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
692 {
693 msg_set_bits(m, 1, 16, 0x1fff, n);
694 }
695
696 static inline u32 msg_node_sig(struct tipc_msg *m)
697 {
698 return msg_bits(m, 1, 0, 0xffff);
699 }
700
701 static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
702 {
703 msg_set_bits(m, 1, 0, 0xffff, n);
704 }
705
706 static inline u32 msg_node_capabilities(struct tipc_msg *m)
707 {
708 return msg_bits(m, 1, 15, 0x1fff);
709 }
710
711 static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
712 {
713 msg_set_bits(m, 1, 15, 0x1fff, n);
714 }
715
716 /*
717 * Word 2
718 */
719 static inline u32 msg_dest_domain(struct tipc_msg *m)
720 {
721 return msg_word(m, 2);
722 }
723
724 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
725 {
726 msg_set_word(m, 2, n);
727 }
728
729 static inline u32 msg_bcgap_after(struct tipc_msg *m)
730 {
731 return msg_bits(m, 2, 16, 0xffff);
732 }
733
734 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
735 {
736 msg_set_bits(m, 2, 16, 0xffff, n);
737 }
738
739 static inline u32 msg_bcgap_to(struct tipc_msg *m)
740 {
741 return msg_bits(m, 2, 0, 0xffff);
742 }
743
744 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
745 {
746 msg_set_bits(m, 2, 0, 0xffff, n);
747 }
748
749 /*
750 * Word 4
751 */
752 static inline u32 msg_last_bcast(struct tipc_msg *m)
753 {
754 return msg_bits(m, 4, 16, 0xffff);
755 }
756
757 static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
758 {
759 return msg_last_bcast(m) + 1;
760 }
761
762 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
763 {
764 msg_set_bits(m, 4, 16, 0xffff, n);
765 }
766
767 static inline u32 msg_nof_fragms(struct tipc_msg *m)
768 {
769 return msg_bits(m, 4, 0, 0xffff);
770 }
771
772 static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n)
773 {
774 msg_set_bits(m, 4, 0, 0xffff, n);
775 }
776
777 static inline u32 msg_fragm_no(struct tipc_msg *m)
778 {
779 return msg_bits(m, 4, 16, 0xffff);
780 }
781
782 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
783 {
784 msg_set_bits(m, 4, 16, 0xffff, n);
785 }
786
787 static inline u16 msg_next_sent(struct tipc_msg *m)
788 {
789 return msg_bits(m, 4, 0, 0xffff);
790 }
791
792 static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
793 {
794 msg_set_bits(m, 4, 0, 0xffff, n);
795 }
796
797 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
798 {
799 msg_set_bits(m, 4, 0, 0xffff, n);
800 }
801
802 static inline u32 msg_bc_netid(struct tipc_msg *m)
803 {
804 return msg_word(m, 4);
805 }
806
807 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
808 {
809 msg_set_word(m, 4, id);
810 }
811
812 static inline u32 msg_link_selector(struct tipc_msg *m)
813 {
814 if (msg_user(m) == MSG_FRAGMENTER)
815 m = (void *)msg_data(m);
816 return msg_bits(m, 4, 0, 1);
817 }
818
819 /*
820 * Word 5
821 */
822 static inline u16 msg_session(struct tipc_msg *m)
823 {
824 return msg_bits(m, 5, 16, 0xffff);
825 }
826
827 static inline void msg_set_session(struct tipc_msg *m, u16 n)
828 {
829 msg_set_bits(m, 5, 16, 0xffff, n);
830 }
831
832 static inline u32 msg_probe(struct tipc_msg *m)
833 {
834 return msg_bits(m, 5, 0, 1);
835 }
836
837 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
838 {
839 msg_set_bits(m, 5, 0, 1, val);
840 }
841
842 static inline char msg_net_plane(struct tipc_msg *m)
843 {
844 return msg_bits(m, 5, 1, 7) + 'A';
845 }
846
847 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
848 {
849 msg_set_bits(m, 5, 1, 7, (n - 'A'));
850 }
851
852 static inline u32 msg_linkprio(struct tipc_msg *m)
853 {
854 return msg_bits(m, 5, 4, 0x1f);
855 }
856
857 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
858 {
859 msg_set_bits(m, 5, 4, 0x1f, n);
860 }
861
862 static inline u32 msg_bearer_id(struct tipc_msg *m)
863 {
864 return msg_bits(m, 5, 9, 0x7);
865 }
866
867 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
868 {
869 msg_set_bits(m, 5, 9, 0x7, n);
870 }
871
872 static inline u32 msg_redundant_link(struct tipc_msg *m)
873 {
874 return msg_bits(m, 5, 12, 0x1);
875 }
876
877 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
878 {
879 msg_set_bits(m, 5, 12, 0x1, r);
880 }
881
882 static inline u32 msg_peer_stopping(struct tipc_msg *m)
883 {
884 return msg_bits(m, 5, 13, 0x1);
885 }
886
887 static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
888 {
889 msg_set_bits(m, 5, 13, 0x1, s);
890 }
891
892 static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
893 {
894 switch (msg_user(m)) {
895 case BCAST_PROTOCOL:
896 case NAME_DISTRIBUTOR:
897 case LINK_PROTOCOL:
898 return msg_bits(m, 5, 14, 0x1);
899 default:
900 return false;
901 }
902 }
903
904 static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
905 {
906 msg_set_bits(m, 5, 14, 0x1, invalid);
907 }
908
909 static inline char *msg_media_addr(struct tipc_msg *m)
910 {
911 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
912 }
913
914 static inline u32 msg_bc_gap(struct tipc_msg *m)
915 {
916 return msg_bits(m, 8, 0, 0x3ff);
917 }
918
919 static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
920 {
921 msg_set_bits(m, 8, 0, 0x3ff, n);
922 }
923
924 /*
925 * Word 9
926 */
927 static inline u16 msg_msgcnt(struct tipc_msg *m)
928 {
929 return msg_bits(m, 9, 16, 0xffff);
930 }
931
932 static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
933 {
934 msg_set_bits(m, 9, 16, 0xffff, n);
935 }
936
937 static inline u16 msg_syncpt(struct tipc_msg *m)
938 {
939 return msg_bits(m, 9, 16, 0xffff);
940 }
941
942 static inline void msg_set_syncpt(struct tipc_msg *m, u16 n)
943 {
944 msg_set_bits(m, 9, 16, 0xffff, n);
945 }
946
947 static inline u32 msg_conn_ack(struct tipc_msg *m)
948 {
949 return msg_bits(m, 9, 16, 0xffff);
950 }
951
952 static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
953 {
954 msg_set_bits(m, 9, 16, 0xffff, n);
955 }
956
957 static inline u16 msg_adv_win(struct tipc_msg *m)
958 {
959 return msg_bits(m, 9, 0, 0xffff);
960 }
961
962 static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
963 {
964 msg_set_bits(m, 9, 0, 0xffff, n);
965 }
966
967 static inline u32 msg_max_pkt(struct tipc_msg *m)
968 {
969 return msg_bits(m, 9, 16, 0xffff) * 4;
970 }
971
972 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
973 {
974 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
975 }
976
977 static inline u32 msg_link_tolerance(struct tipc_msg *m)
978 {
979 return msg_bits(m, 9, 0, 0xffff);
980 }
981
982 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
983 {
984 msg_set_bits(m, 9, 0, 0xffff, n);
985 }
986
987 static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
988 {
989 return msg_bits(m, 9, 16, 0xffff);
990 }
991
992 static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
993 {
994 msg_set_bits(m, 9, 16, 0xffff, n);
995 }
996
997 static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
998 {
999 return msg_bits(m, 9, 16, 0xffff);
1000 }
1001
1002 static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
1003 {
1004 msg_set_bits(m, 9, 16, 0xffff, n);
1005 }
1006
1007 static inline u16 msg_grp_remitted(struct tipc_msg *m)
1008 {
1009 return msg_bits(m, 9, 16, 0xffff);
1010 }
1011
1012 static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
1013 {
1014 msg_set_bits(m, 9, 16, 0xffff, n);
1015 }
1016
1017 /* Word 10
1018 */
1019 static inline u16 msg_grp_evt(struct tipc_msg *m)
1020 {
1021 return msg_bits(m, 10, 0, 0x3);
1022 }
1023
1024 static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
1025 {
1026 msg_set_bits(m, 10, 0, 0x3, n);
1027 }
1028
1029 static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
1030 {
1031 return msg_bits(m, 10, 0, 0x1);
1032 }
1033
1034 static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
1035 {
1036 msg_set_bits(m, 10, 0, 0x1, n);
1037 }
1038
1039 static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
1040 {
1041 return msg_bits(m, 10, 16, 0xffff);
1042 }
1043
1044 static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
1045 {
1046 msg_set_bits(m, 10, 16, 0xffff, n);
1047 }
1048
1049 static inline bool msg_peer_link_is_up(struct tipc_msg *m)
1050 {
1051 if (likely(msg_user(m) != LINK_PROTOCOL))
1052 return true;
1053 if (msg_type(m) == STATE_MSG)
1054 return true;
1055 return false;
1056 }
1057
1058 static inline bool msg_peer_node_is_up(struct tipc_msg *m)
1059 {
1060 if (msg_peer_link_is_up(m))
1061 return true;
1062 return msg_redundant_link(m);
1063 }
1064
1065 static inline bool msg_is_reset(struct tipc_msg *hdr)
1066 {
1067 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
1068 }
1069
1070 /* Word 13
1071 */
1072 static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n)
1073 {
1074 msg_set_word(m, 13, n);
1075 }
1076
1077 static inline u32 msg_peer_net_hash(struct tipc_msg *m)
1078 {
1079 return msg_word(m, 13);
1080 }
1081
1082 /* Word 14
1083 */
1084 static inline u32 msg_sugg_node_addr(struct tipc_msg *m)
1085 {
1086 return msg_word(m, 14);
1087 }
1088
1089 static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n)
1090 {
1091 msg_set_word(m, 14, n);
1092 }
1093
1094 static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id)
1095 {
1096 memcpy(msg_data(hdr), id, 16);
1097 }
1098
1099 static inline u8 *msg_node_id(struct tipc_msg *hdr)
1100 {
1101 return (u8 *)msg_data(hdr);
1102 }
1103
1104 struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
1105 bool tipc_msg_validate(struct sk_buff **_skb);
1106 bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
1107 void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
1108 struct sk_buff_head *xmitq);
1109 void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
1110 u32 hsize, u32 destnode);
1111 struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
1112 uint data_sz, u32 dnode, u32 onode,
1113 u32 dport, u32 oport, int errcode);
1114 int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
1115 bool tipc_msg_try_bundle(struct sk_buff *tskb, struct sk_buff **skb, u32 mss,
1116 u32 dnode, bool *new_bundle);
1117 bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
1118 int tipc_msg_fragment(struct sk_buff *skb, const struct tipc_msg *hdr,
1119 int pktmax, struct sk_buff_head *frags);
1120 int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
1121 int offset, int dsz, int mtu, struct sk_buff_head *list);
1122 int tipc_msg_append(struct tipc_msg *hdr, struct msghdr *m, int dlen,
1123 int mss, struct sk_buff_head *txq);
1124 bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
1125 bool tipc_msg_assemble(struct sk_buff_head *list);
1126 bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
1127 bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
1128 struct sk_buff_head *cpy);
1129 void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
1130 struct sk_buff *skb);
1131 bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy);
1132
1133 static inline u16 buf_seqno(struct sk_buff *skb)
1134 {
1135 return msg_seqno(buf_msg(skb));
1136 }
1137
1138 static inline int buf_roundup_len(struct sk_buff *skb)
1139 {
1140 return (skb->len / 1024 + 1) * 1024;
1141 }
1142
1143 /* tipc_skb_peek(): peek and reserve first buffer in list
1144 * @list: list to be peeked in
1145 * Returns pointer to first buffer in list, if any
1146 */
1147 static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
1148 spinlock_t *lock)
1149 {
1150 struct sk_buff *skb;
1151
1152 spin_lock_bh(lock);
1153 skb = skb_peek(list);
1154 if (skb)
1155 skb_get(skb);
1156 spin_unlock_bh(lock);
1157 return skb;
1158 }
1159
1160 /* tipc_skb_peek_port(): find a destination port, ignoring all destinations
1161 * up to and including 'filter'.
1162 * Note: ignoring previously tried destinations minimizes the risk of
1163 * contention on the socket lock
1164 * @list: list to be peeked in
1165 * @filter: last destination to be ignored from search
1166 * Returns a destination port number, of applicable.
1167 */
1168 static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
1169 {
1170 struct sk_buff *skb;
1171 u32 dport = 0;
1172 bool ignore = true;
1173
1174 spin_lock_bh(&list->lock);
1175 skb_queue_walk(list, skb) {
1176 dport = msg_destport(buf_msg(skb));
1177 if (!filter || skb_queue_is_last(list, skb))
1178 break;
1179 if (dport == filter)
1180 ignore = false;
1181 else if (!ignore)
1182 break;
1183 }
1184 spin_unlock_bh(&list->lock);
1185 return dport;
1186 }
1187
1188 /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1189 * @list: list to be unlinked from
1190 * @dport: selection criteria for buffer to unlink
1191 */
1192 static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1193 u32 dport)
1194 {
1195 struct sk_buff *_skb, *tmp, *skb = NULL;
1196
1197 spin_lock_bh(&list->lock);
1198 skb_queue_walk_safe(list, _skb, tmp) {
1199 if (msg_destport(buf_msg(_skb)) == dport) {
1200 __skb_unlink(_skb, list);
1201 skb = _skb;
1202 break;
1203 }
1204 }
1205 spin_unlock_bh(&list->lock);
1206 return skb;
1207 }
1208
1209 /* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1210 * @list: the new list to append. Not lock protected
1211 * @head: target list. Lock protected.
1212 */
1213 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1214 struct sk_buff_head *head)
1215 {
1216 spin_lock_bh(&head->lock);
1217 skb_queue_splice_tail(list, head);
1218 spin_unlock_bh(&head->lock);
1219 }
1220
1221 /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1222 * @list: the new list to add. Lock protected. Will be reinitialized
1223 * @head: target list. Lock protected.
1224 */
1225 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1226 struct sk_buff_head *head)
1227 {
1228 struct sk_buff_head tmp;
1229
1230 __skb_queue_head_init(&tmp);
1231
1232 spin_lock_bh(&list->lock);
1233 skb_queue_splice_tail_init(list, &tmp);
1234 spin_unlock_bh(&list->lock);
1235 tipc_skb_queue_splice_tail(&tmp, head);
1236 }
1237
1238 /* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno
1239 * @list: list to be dequeued from
1240 * @seqno: seqno of the expected msg
1241 *
1242 * returns skb dequeued from the list if its seqno is less than or equal to
1243 * the expected one, otherwise the skb is still hold
1244 *
1245 * Note: must be used with appropriate locks held only
1246 */
1247 static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list,
1248 u16 seqno)
1249 {
1250 struct sk_buff *skb = skb_peek(list);
1251
1252 if (skb && less_eq(buf_seqno(skb), seqno)) {
1253 __skb_unlink(skb, list);
1254 return skb;
1255 }
1256 return NULL;
1257 }
1258
1259 #endif
Linux with added FPC-III support