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37#ifndef _TIPC_MSG_H
38#define _TIPC_MSG_H
39
40#include <linux/tipc.h>
41#include "core.h"
42
43
44
45
46
47
48#define TIPC_VERSION 2
49struct plist;
50
51
52
53
54
55
56
57
58#define TIPC_SYSTEM_IMPORTANCE 4
59
60
61
62
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
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
86#define TOP_SRV 15
87
88
89
90
91#define SHORT_H_SIZE 24
92#define BASIC_H_SIZE 32
93#define NAMED_H_SIZE 40
94#define MCAST_H_SIZE 44
95#define GROUP_H_SIZE 44
96#define INT_H_SIZE 40
97#define MIN_H_SIZE 24
98#define MAX_H_SIZE 60
99
100#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
101
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
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
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
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
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
513
514
515
516
517
518#define CONN_PROBE 0
519#define CONN_PROBE_REPLY 1
520#define CONN_ACK 2
521
522
523
524
525#define PUBLICATION 0
526#define WITHDRAWAL 1
527
528
529
530
531#define FIRST_FRAGMENT 0
532#define FRAGMENT 1
533#define LAST_FRAGMENT 2
534
535
536
537
538#define STATE_MSG 0
539#define RESET_MSG 1
540#define ACTIVATE_MSG 2
541
542
543
544
545#define SYNCH_MSG 0
546#define FAILOVER_MSG 1
547
548
549
550
551#define DSC_REQ_MSG 0
552#define DSC_RESP_MSG 1
553
554
555
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
566
567static inline u32 msg_seq_gap(struct tipc_msg *m)
568{
569 return msg_bits(m, 1, 16, 0x1fff);
570}
571
572static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
573{
574 msg_set_bits(m, 1, 16, 0x1fff, n);
575}
576
577static inline u32 msg_node_sig(struct tipc_msg *m)
578{
579 return msg_bits(m, 1, 0, 0xffff);
580}
581
582static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
583{
584 msg_set_bits(m, 1, 0, 0xffff, n);
585}
586
587static inline u32 msg_node_capabilities(struct tipc_msg *m)
588{
589 return msg_bits(m, 1, 15, 0x1fff);
590}
591
592static 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
599
600static inline u32 msg_dest_domain(struct tipc_msg *m)
601{
602 return msg_word(m, 2);
603}
604
605static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
606{
607 msg_set_word(m, 2, n);
608}
609
610static inline u32 msg_bcgap_after(struct tipc_msg *m)
611{
612 return msg_bits(m, 2, 16, 0xffff);
613}
614
615static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
616{
617 msg_set_bits(m, 2, 16, 0xffff, n);
618}
619
620static inline u32 msg_bcgap_to(struct tipc_msg *m)
621{
622 return msg_bits(m, 2, 0, 0xffff);
623}
624
625static 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
633
634static inline u32 msg_last_bcast(struct tipc_msg *m)
635{
636 return msg_bits(m, 4, 16, 0xffff);
637}
638
639static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
640{
641 return msg_last_bcast(m) + 1;
642}
643
644static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
645{
646 msg_set_bits(m, 4, 16, 0xffff, n);
647}
648
649static 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
655static inline u16 msg_next_sent(struct tipc_msg *m)
656{
657 return msg_bits(m, 4, 0, 0xffff);
658}
659
660static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
661{
662 msg_set_bits(m, 4, 0, 0xffff, n);
663}
664
665static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
666{
667 msg_set_bits(m, 4, 0, 0xffff, n);
668}
669
670static inline u32 msg_bc_netid(struct tipc_msg *m)
671{
672 return msg_word(m, 4);
673}
674
675static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
676{
677 msg_set_word(m, 4, id);
678}
679
680static 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
689
690static inline u16 msg_session(struct tipc_msg *m)
691{
692 return msg_bits(m, 5, 16, 0xffff);
693}
694
695static inline void msg_set_session(struct tipc_msg *m, u16 n)
696{
697 msg_set_bits(m, 5, 16, 0xffff, n);
698}
699
700static inline u32 msg_probe(struct tipc_msg *m)
701{
702 return msg_bits(m, 5, 0, 1);
703}
704
705static inline void msg_set_probe(struct tipc_msg *m, u32 val)
706{
707 msg_set_bits(m, 5, 0, 1, val);
708}
709
710static inline char msg_net_plane(struct tipc_msg *m)
711{
712 return msg_bits(m, 5, 1, 7) + 'A';
713}
714
715static 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
720static inline u32 msg_linkprio(struct tipc_msg *m)
721{
722 return msg_bits(m, 5, 4, 0x1f);
723}
724
725static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
726{
727 msg_set_bits(m, 5, 4, 0x1f, n);
728}
729
730static inline u32 msg_bearer_id(struct tipc_msg *m)
731{
732 return msg_bits(m, 5, 9, 0x7);
733}
734
735static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
736{
737 msg_set_bits(m, 5, 9, 0x7, n);
738}
739
740static inline u32 msg_redundant_link(struct tipc_msg *m)
741{
742 return msg_bits(m, 5, 12, 0x1);
743}
744
745static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
746{
747 msg_set_bits(m, 5, 12, 0x1, r);
748}
749
750static inline u32 msg_peer_stopping(struct tipc_msg *m)
751{
752 return msg_bits(m, 5, 13, 0x1);
753}
754
755static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
756{
757 msg_set_bits(m, 5, 13, 0x1, s);
758}
759
760static 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
772static 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
777static inline char *msg_media_addr(struct tipc_msg *m)
778{
779 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
780}
781
782static inline u32 msg_bc_gap(struct tipc_msg *m)
783{
784 return msg_bits(m, 8, 0, 0x3ff);
785}
786
787static 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
794
795static inline u16 msg_msgcnt(struct tipc_msg *m)
796{
797 return msg_bits(m, 9, 16, 0xffff);
798}
799
800static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
801{
802 msg_set_bits(m, 9, 16, 0xffff, n);
803}
804
805static inline u32 msg_conn_ack(struct tipc_msg *m)
806{
807 return msg_bits(m, 9, 16, 0xffff);
808}
809
810static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
811{
812 msg_set_bits(m, 9, 16, 0xffff, n);
813}
814
815static inline u16 msg_adv_win(struct tipc_msg *m)
816{
817 return msg_bits(m, 9, 0, 0xffff);
818}
819
820static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
821{
822 msg_set_bits(m, 9, 0, 0xffff, n);
823}
824
825static inline u32 msg_max_pkt(struct tipc_msg *m)
826{
827 return msg_bits(m, 9, 16, 0xffff) * 4;
828}
829
830static 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
835static inline u32 msg_link_tolerance(struct tipc_msg *m)
836{
837 return msg_bits(m, 9, 0, 0xffff);
838}
839
840static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
841{
842 msg_set_bits(m, 9, 0, 0xffff, n);
843}
844
845static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
846{
847 return msg_bits(m, 9, 16, 0xffff);
848}
849
850static 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
855static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
856{
857 return msg_bits(m, 9, 16, 0xffff);
858}
859
860static 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
865static inline u16 msg_grp_remitted(struct tipc_msg *m)
866{
867 return msg_bits(m, 9, 16, 0xffff);
868}
869
870static 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
876
877static inline u16 msg_grp_evt(struct tipc_msg *m)
878{
879 return msg_bits(m, 10, 0, 0x3);
880}
881
882static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
883{
884 msg_set_bits(m, 10, 0, 0x3, n);
885}
886
887static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
888{
889 return msg_bits(m, 10, 0, 0x1);
890}
891
892static 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
897static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
898{
899 return msg_bits(m, 10, 16, 0xffff);
900}
901
902static 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
907static 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
916static 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
923static inline bool msg_is_reset(struct tipc_msg *hdr)
924{
925 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
926}
927
928struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
929bool tipc_msg_validate(struct sk_buff **_skb);
930bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
931void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
932 struct sk_buff_head *xmitq);
933void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
934 u32 hsize, u32 destnode);
935struct 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);
938int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
939bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu);
940bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg,
941 u32 mtu, u32 dnode);
942bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
943int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
944 int offset, int dsz, int mtu, struct sk_buff_head *list);
945bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
946bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
947bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
948 struct sk_buff_head *cpy);
949void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
950 struct sk_buff *skb);
951
952static inline u16 buf_seqno(struct sk_buff *skb)
953{
954 return msg_seqno(buf_msg(skb));
955}
956
957static inline int buf_roundup_len(struct sk_buff *skb)
958{
959 return (skb->len / 1024 + 1) * 1024;
960}
961
962
963
964
965
966static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
967 spinlock_t *lock)
968{
969 struct sk_buff *skb;
970
971 spin_lock_bh(lock);
972 skb = skb_peek(list);
973 if (skb)
974 skb_get(skb);
975 spin_unlock_bh(lock);
976 return skb;
977}
978
979
980
981
982
983
984
985
986
987static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
988{
989 struct sk_buff *skb;
990 u32 dport = 0;
991 bool ignore = true;
992
993 spin_lock_bh(&list->lock);
994 skb_queue_walk(list, skb) {
995 dport = msg_destport(buf_msg(skb));
996 if (!filter || skb_queue_is_last(list, skb))
997 break;
998 if (dport == filter)
999 ignore = false;
1000 else if (!ignore)
1001 break;
1002 }
1003 spin_unlock_bh(&list->lock);
1004 return dport;
1005}
1006
1007
1008
1009
1010
1011static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1012 u32 dport)
1013{
1014 struct sk_buff *_skb, *tmp, *skb = NULL;
1015
1016 spin_lock_bh(&list->lock);
1017 skb_queue_walk_safe(list, _skb, tmp) {
1018 if (msg_destport(buf_msg(_skb)) == dport) {
1019 __skb_unlink(_skb, list);
1020 skb = _skb;
1021 break;
1022 }
1023 }
1024 spin_unlock_bh(&list->lock);
1025 return skb;
1026}
1027
1028
1029
1030
1031
1032static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1033 struct sk_buff_head *head)
1034{
1035 spin_lock_bh(&head->lock);
1036 skb_queue_splice_tail(list, head);
1037 spin_unlock_bh(&head->lock);
1038}
1039
1040
1041
1042
1043
1044static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1045 struct sk_buff_head *head)
1046{
1047 struct sk_buff_head tmp;
1048
1049 __skb_queue_head_init(&tmp);
1050
1051 spin_lock_bh(&list->lock);
1052 skb_queue_splice_tail_init(list, &tmp);
1053 spin_unlock_bh(&list->lock);
1054 tipc_skb_queue_splice_tail(&tmp, head);
1055}
1056
1057#endif
1058