2 * net/tipc/msg.h: Include file for TIPC message header routines
4 * Copyright (c) 2000-2007, 2014-2017 Ericsson AB
5 * Copyright (c) 2005-2008, 2010-2011, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
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.
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.
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
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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.
40 #include <linux/tipc.h>
44 * Constants and routines used to read and write TIPC payload message headers
46 * Note: Some items are also used with TIPC internal message headers
48 #define TIPC_VERSION 2
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
58 #define TIPC_SYSTEM_IMPORTANCE 4
62 * Payload message types
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
74 * Internal message users
76 #define BCAST_PROTOCOL 5
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 */
89 * Message header sizes
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 */
100 #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
102 #define TIPC_MEDIA_INFO_OFFSET 5
107 struct sk_buff *tail;
108 unsigned long nxt_retr;
114 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
120 static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
122 return (struct tipc_msg *)skb->data;
125 static inline u32 msg_word(struct tipc_msg *m, u32 pos)
127 return ntohl(m->hdr[pos]);
130 static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
132 m->hdr[w] = htonl(val);
135 static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
137 return (msg_word(m, w) >> pos) & mask;
140 static inline void msg_set_bits(struct tipc_msg *m, u32 w,
141 u32 pos, u32 mask, u32 val)
143 val = (val & mask) << pos;
145 m->hdr[w] &= ~htonl(mask);
146 m->hdr[w] |= htonl(val);
149 static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
151 u32 temp = msg->hdr[a];
153 msg->hdr[a] = msg->hdr[b];
160 static inline u32 msg_version(struct tipc_msg *m)
162 return msg_bits(m, 0, 29, 7);
165 static inline void msg_set_version(struct tipc_msg *m)
167 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
170 static inline u32 msg_user(struct tipc_msg *m)
172 return msg_bits(m, 0, 25, 0xf);
175 static inline u32 msg_isdata(struct tipc_msg *m)
177 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
180 static inline void msg_set_user(struct tipc_msg *m, u32 n)
182 msg_set_bits(m, 0, 25, 0xf, n);
185 static inline u32 msg_hdr_sz(struct tipc_msg *m)
187 return msg_bits(m, 0, 21, 0xf) << 2;
190 static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
192 msg_set_bits(m, 0, 21, 0xf, n>>2);
195 static inline u32 msg_size(struct tipc_msg *m)
197 return msg_bits(m, 0, 0, 0x1ffff);
200 static inline u32 msg_blocks(struct tipc_msg *m)
202 return (msg_size(m) / 1024) + 1;
205 static inline u32 msg_data_sz(struct tipc_msg *m)
207 return msg_size(m) - msg_hdr_sz(m);
210 static inline int msg_non_seq(struct tipc_msg *m)
212 return msg_bits(m, 0, 20, 1);
215 static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
217 msg_set_bits(m, 0, 20, 1, n);
220 static inline int msg_is_syn(struct tipc_msg *m)
222 return msg_bits(m, 0, 17, 1);
225 static inline void msg_set_syn(struct tipc_msg *m, u32 d)
227 msg_set_bits(m, 0, 17, 1, d);
230 static inline int msg_dest_droppable(struct tipc_msg *m)
232 return msg_bits(m, 0, 19, 1);
235 static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
237 msg_set_bits(m, 0, 19, 1, d);
240 static inline int msg_is_keepalive(struct tipc_msg *m)
242 return msg_bits(m, 0, 19, 1);
245 static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
247 msg_set_bits(m, 0, 19, 1, d);
250 static inline int msg_src_droppable(struct tipc_msg *m)
252 return msg_bits(m, 0, 18, 1);
255 static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
257 msg_set_bits(m, 0, 18, 1, d);
260 static inline void msg_set_size(struct tipc_msg *m, u32 sz)
262 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
265 static inline unchar *msg_data(struct tipc_msg *m)
267 return ((unchar *)m) + msg_hdr_sz(m);
270 static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
272 return (struct tipc_msg *)msg_data(m);
278 static inline u32 msg_type(struct tipc_msg *m)
280 return msg_bits(m, 1, 29, 0x7);
283 static inline void msg_set_type(struct tipc_msg *m, u32 n)
285 msg_set_bits(m, 1, 29, 0x7, n);
288 static inline int msg_in_group(struct tipc_msg *m)
290 int mtyp = msg_type(m);
292 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
295 static inline bool msg_is_grp_evt(struct tipc_msg *m)
297 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
300 static inline u32 msg_named(struct tipc_msg *m)
302 return msg_type(m) == TIPC_NAMED_MSG;
305 static inline u32 msg_mcast(struct tipc_msg *m)
307 int mtyp = msg_type(m);
309 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
310 (mtyp == TIPC_GRP_MCAST_MSG));
313 static inline u32 msg_connected(struct tipc_msg *m)
315 return msg_type(m) == TIPC_CONN_MSG;
318 static inline u32 msg_errcode(struct tipc_msg *m)
320 return msg_bits(m, 1, 25, 0xf);
323 static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
325 msg_set_bits(m, 1, 25, 0xf, err);
328 static inline u32 msg_reroute_cnt(struct tipc_msg *m)
330 return msg_bits(m, 1, 21, 0xf);
333 static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
335 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
338 static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
340 msg_set_bits(m, 1, 21, 0xf, 0);
343 static inline u32 msg_lookup_scope(struct tipc_msg *m)
345 return msg_bits(m, 1, 19, 0x3);
348 static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
350 msg_set_bits(m, 1, 19, 0x3, n);
353 static inline u16 msg_bcast_ack(struct tipc_msg *m)
355 return msg_bits(m, 1, 0, 0xffff);
358 static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
360 msg_set_bits(m, 1, 0, 0xffff, n);
363 /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
364 * link peer session number
366 static inline bool msg_dest_session_valid(struct tipc_msg *m)
368 return msg_bits(m, 1, 16, 0x1);
371 static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid)
373 msg_set_bits(m, 1, 16, 0x1, valid);
376 static inline u16 msg_dest_session(struct tipc_msg *m)
378 return msg_bits(m, 1, 0, 0xffff);
381 static inline void msg_set_dest_session(struct tipc_msg *m, u16 n)
383 msg_set_bits(m, 1, 0, 0xffff, n);
389 static inline u16 msg_ack(struct tipc_msg *m)
391 return msg_bits(m, 2, 16, 0xffff);
394 static inline void msg_set_ack(struct tipc_msg *m, u16 n)
396 msg_set_bits(m, 2, 16, 0xffff, n);
399 static inline u16 msg_seqno(struct tipc_msg *m)
401 return msg_bits(m, 2, 0, 0xffff);
404 static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
406 msg_set_bits(m, 2, 0, 0xffff, n);
412 static inline u32 msg_importance(struct tipc_msg *m)
414 int usr = msg_user(m);
416 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
418 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
419 return msg_bits(m, 9, 0, 0x7);
420 return TIPC_SYSTEM_IMPORTANCE;
423 static inline void msg_set_importance(struct tipc_msg *m, u32 i)
425 int usr = msg_user(m);
427 if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)))
428 msg_set_bits(m, 9, 0, 0x7, i);
429 else if (i < TIPC_SYSTEM_IMPORTANCE)
432 pr_warn("Trying to set illegal importance in message\n");
435 static inline u32 msg_prevnode(struct tipc_msg *m)
437 return msg_word(m, 3);
440 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
442 msg_set_word(m, 3, a);
445 static inline u32 msg_origport(struct tipc_msg *m)
447 if (msg_user(m) == MSG_FRAGMENTER)
448 m = msg_get_wrapped(m);
449 return msg_word(m, 4);
452 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
454 msg_set_word(m, 4, p);
457 static inline u32 msg_destport(struct tipc_msg *m)
459 return msg_word(m, 5);
462 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
464 msg_set_word(m, 5, p);
467 static inline u32 msg_mc_netid(struct tipc_msg *m)
469 return msg_word(m, 5);
472 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
474 msg_set_word(m, 5, p);
477 static inline int msg_short(struct tipc_msg *m)
479 return msg_hdr_sz(m) == SHORT_H_SIZE;
482 static inline u32 msg_orignode(struct tipc_msg *m)
484 if (likely(msg_short(m)))
485 return msg_prevnode(m);
486 return msg_word(m, 6);
489 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
491 msg_set_word(m, 6, a);
494 static inline u32 msg_destnode(struct tipc_msg *m)
496 return msg_word(m, 7);
499 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
501 msg_set_word(m, 7, a);
504 static inline u32 msg_nametype(struct tipc_msg *m)
506 return msg_word(m, 8);
509 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
511 msg_set_word(m, 8, n);
514 static inline u32 msg_nameinst(struct tipc_msg *m)
516 return msg_word(m, 9);
519 static inline u32 msg_namelower(struct tipc_msg *m)
521 return msg_nameinst(m);
524 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
526 msg_set_word(m, 9, n);
529 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
531 msg_set_namelower(m, n);
534 static inline u32 msg_nameupper(struct tipc_msg *m)
536 return msg_word(m, 10);
539 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
541 msg_set_word(m, 10, n);
545 * Constants and routines used to read and write TIPC internal message headers
549 * Connection management protocol message types
552 #define CONN_PROBE_REPLY 1
556 * Name distributor message types
558 #define PUBLICATION 0
562 * Segmentation message types
564 #define FIRST_FRAGMENT 0
566 #define LAST_FRAGMENT 2
569 * Link management protocol message types
573 #define ACTIVATE_MSG 2
576 * Changeover tunnel message types
579 #define FAILOVER_MSG 1
582 * Config protocol message types
584 #define DSC_REQ_MSG 0
585 #define DSC_RESP_MSG 1
586 #define DSC_TRIAL_MSG 2
587 #define DSC_TRIAL_FAIL_MSG 3
590 * Group protocol message types
592 #define GRP_JOIN_MSG 0
593 #define GRP_LEAVE_MSG 1
594 #define GRP_ADV_MSG 2
595 #define GRP_ACK_MSG 3
596 #define GRP_RECLAIM_MSG 4
597 #define GRP_REMIT_MSG 5
602 static inline u32 msg_seq_gap(struct tipc_msg *m)
604 return msg_bits(m, 1, 16, 0x1fff);
607 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
609 msg_set_bits(m, 1, 16, 0x1fff, n);
612 static inline u32 msg_node_sig(struct tipc_msg *m)
614 return msg_bits(m, 1, 0, 0xffff);
617 static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
619 msg_set_bits(m, 1, 0, 0xffff, n);
622 static inline u32 msg_node_capabilities(struct tipc_msg *m)
624 return msg_bits(m, 1, 15, 0x1fff);
627 static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
629 msg_set_bits(m, 1, 15, 0x1fff, n);
635 static inline u32 msg_dest_domain(struct tipc_msg *m)
637 return msg_word(m, 2);
640 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
642 msg_set_word(m, 2, n);
645 static inline u32 msg_bcgap_after(struct tipc_msg *m)
647 return msg_bits(m, 2, 16, 0xffff);
650 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
652 msg_set_bits(m, 2, 16, 0xffff, n);
655 static inline u32 msg_bcgap_to(struct tipc_msg *m)
657 return msg_bits(m, 2, 0, 0xffff);
660 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
662 msg_set_bits(m, 2, 0, 0xffff, n);
668 static inline u32 msg_last_bcast(struct tipc_msg *m)
670 return msg_bits(m, 4, 16, 0xffff);
673 static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
675 return msg_last_bcast(m) + 1;
678 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
680 msg_set_bits(m, 4, 16, 0xffff, n);
683 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
685 msg_set_bits(m, 4, 16, 0xffff, n);
689 static inline u16 msg_next_sent(struct tipc_msg *m)
691 return msg_bits(m, 4, 0, 0xffff);
694 static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
696 msg_set_bits(m, 4, 0, 0xffff, n);
699 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
701 msg_set_bits(m, 4, 0, 0xffff, n);
704 static inline u32 msg_bc_netid(struct tipc_msg *m)
706 return msg_word(m, 4);
709 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
711 msg_set_word(m, 4, id);
714 static inline u32 msg_link_selector(struct tipc_msg *m)
716 if (msg_user(m) == MSG_FRAGMENTER)
717 m = (void *)msg_data(m);
718 return msg_bits(m, 4, 0, 1);
724 static inline u16 msg_session(struct tipc_msg *m)
726 return msg_bits(m, 5, 16, 0xffff);
729 static inline void msg_set_session(struct tipc_msg *m, u16 n)
731 msg_set_bits(m, 5, 16, 0xffff, n);
734 static inline u32 msg_probe(struct tipc_msg *m)
736 return msg_bits(m, 5, 0, 1);
739 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
741 msg_set_bits(m, 5, 0, 1, val);
744 static inline char msg_net_plane(struct tipc_msg *m)
746 return msg_bits(m, 5, 1, 7) + 'A';
749 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
751 msg_set_bits(m, 5, 1, 7, (n - 'A'));
754 static inline u32 msg_linkprio(struct tipc_msg *m)
756 return msg_bits(m, 5, 4, 0x1f);
759 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
761 msg_set_bits(m, 5, 4, 0x1f, n);
764 static inline u32 msg_bearer_id(struct tipc_msg *m)
766 return msg_bits(m, 5, 9, 0x7);
769 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
771 msg_set_bits(m, 5, 9, 0x7, n);
774 static inline u32 msg_redundant_link(struct tipc_msg *m)
776 return msg_bits(m, 5, 12, 0x1);
779 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
781 msg_set_bits(m, 5, 12, 0x1, r);
784 static inline u32 msg_peer_stopping(struct tipc_msg *m)
786 return msg_bits(m, 5, 13, 0x1);
789 static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
791 msg_set_bits(m, 5, 13, 0x1, s);
794 static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
796 switch (msg_user(m)) {
798 case NAME_DISTRIBUTOR:
800 return msg_bits(m, 5, 14, 0x1);
806 static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
808 msg_set_bits(m, 5, 14, 0x1, invalid);
811 static inline char *msg_media_addr(struct tipc_msg *m)
813 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
816 static inline u32 msg_bc_gap(struct tipc_msg *m)
818 return msg_bits(m, 8, 0, 0x3ff);
821 static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
823 msg_set_bits(m, 8, 0, 0x3ff, n);
829 static inline u16 msg_msgcnt(struct tipc_msg *m)
831 return msg_bits(m, 9, 16, 0xffff);
834 static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
836 msg_set_bits(m, 9, 16, 0xffff, n);
839 static inline u32 msg_conn_ack(struct tipc_msg *m)
841 return msg_bits(m, 9, 16, 0xffff);
844 static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
846 msg_set_bits(m, 9, 16, 0xffff, n);
849 static inline u16 msg_adv_win(struct tipc_msg *m)
851 return msg_bits(m, 9, 0, 0xffff);
854 static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
856 msg_set_bits(m, 9, 0, 0xffff, n);
859 static inline u32 msg_max_pkt(struct tipc_msg *m)
861 return msg_bits(m, 9, 16, 0xffff) * 4;
864 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
866 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
869 static inline u32 msg_link_tolerance(struct tipc_msg *m)
871 return msg_bits(m, 9, 0, 0xffff);
874 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
876 msg_set_bits(m, 9, 0, 0xffff, n);
879 static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
881 return msg_bits(m, 9, 16, 0xffff);
884 static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
886 msg_set_bits(m, 9, 16, 0xffff, n);
889 static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
891 return msg_bits(m, 9, 16, 0xffff);
894 static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
896 msg_set_bits(m, 9, 16, 0xffff, n);
899 static inline u16 msg_grp_remitted(struct tipc_msg *m)
901 return msg_bits(m, 9, 16, 0xffff);
904 static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
906 msg_set_bits(m, 9, 16, 0xffff, n);
911 static inline u16 msg_grp_evt(struct tipc_msg *m)
913 return msg_bits(m, 10, 0, 0x3);
916 static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
918 msg_set_bits(m, 10, 0, 0x3, n);
921 static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
923 return msg_bits(m, 10, 0, 0x1);
926 static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
928 msg_set_bits(m, 10, 0, 0x1, n);
931 static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
933 return msg_bits(m, 10, 16, 0xffff);
936 static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
938 msg_set_bits(m, 10, 16, 0xffff, n);
941 static inline bool msg_peer_link_is_up(struct tipc_msg *m)
943 if (likely(msg_user(m) != LINK_PROTOCOL))
945 if (msg_type(m) == STATE_MSG)
950 static inline bool msg_peer_node_is_up(struct tipc_msg *m)
952 if (msg_peer_link_is_up(m))
954 return msg_redundant_link(m);
957 static inline bool msg_is_reset(struct tipc_msg *hdr)
959 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
962 static inline u32 msg_sugg_node_addr(struct tipc_msg *m)
964 return msg_word(m, 14);
967 static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n)
969 msg_set_word(m, 14, n);
972 static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id)
974 memcpy(msg_data(hdr), id, 16);
977 static inline u8 *msg_node_id(struct tipc_msg *hdr)
979 return (u8 *)msg_data(hdr);
982 struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
983 bool tipc_msg_validate(struct sk_buff **_skb);
984 bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
985 void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
986 struct sk_buff_head *xmitq);
987 void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
988 u32 hsize, u32 destnode);
989 struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
990 uint data_sz, u32 dnode, u32 onode,
991 u32 dport, u32 oport, int errcode);
992 int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
993 bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu);
994 bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg,
996 bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
997 int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
998 int offset, int dsz, int mtu, struct sk_buff_head *list);
999 bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
1000 bool tipc_msg_assemble(struct sk_buff_head *list);
1001 bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
1002 bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
1003 struct sk_buff_head *cpy);
1004 void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
1005 struct sk_buff *skb);
1006 bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy);
1008 static inline u16 buf_seqno(struct sk_buff *skb)
1010 return msg_seqno(buf_msg(skb));
1013 static inline int buf_roundup_len(struct sk_buff *skb)
1015 return (skb->len / 1024 + 1) * 1024;
1018 /* tipc_skb_peek(): peek and reserve first buffer in list
1019 * @list: list to be peeked in
1020 * Returns pointer to first buffer in list, if any
1022 static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
1025 struct sk_buff *skb;
1028 skb = skb_peek(list);
1031 spin_unlock_bh(lock);
1035 /* tipc_skb_peek_port(): find a destination port, ignoring all destinations
1036 * up to and including 'filter'.
1037 * Note: ignoring previously tried destinations minimizes the risk of
1038 * contention on the socket lock
1039 * @list: list to be peeked in
1040 * @filter: last destination to be ignored from search
1041 * Returns a destination port number, of applicable.
1043 static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
1045 struct sk_buff *skb;
1049 spin_lock_bh(&list->lock);
1050 skb_queue_walk(list, skb) {
1051 dport = msg_destport(buf_msg(skb));
1052 if (!filter || skb_queue_is_last(list, skb))
1054 if (dport == filter)
1059 spin_unlock_bh(&list->lock);
1063 /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1064 * @list: list to be unlinked from
1065 * @dport: selection criteria for buffer to unlink
1067 static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1070 struct sk_buff *_skb, *tmp, *skb = NULL;
1072 spin_lock_bh(&list->lock);
1073 skb_queue_walk_safe(list, _skb, tmp) {
1074 if (msg_destport(buf_msg(_skb)) == dport) {
1075 __skb_unlink(_skb, list);
1080 spin_unlock_bh(&list->lock);
1084 /* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1085 * @list: the new list to append. Not lock protected
1086 * @head: target list. Lock protected.
1088 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1089 struct sk_buff_head *head)
1091 spin_lock_bh(&head->lock);
1092 skb_queue_splice_tail(list, head);
1093 spin_unlock_bh(&head->lock);
1096 /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1097 * @list: the new list to add. Lock protected. Will be reinitialized
1098 * @head: target list. Lock protected.
1100 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1101 struct sk_buff_head *head)
1103 struct sk_buff_head tmp;
1105 __skb_queue_head_init(&tmp);
1107 spin_lock_bh(&list->lock);
1108 skb_queue_splice_tail_init(list, &tmp);
1109 spin_unlock_bh(&list->lock);
1110 tipc_skb_queue_splice_tail(&tmp, head);