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
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.
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
105 struct sk_buff *tail;
106 unsigned long nxt_retr;
107 unsigned long retr_stamp;
116 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
122 /* struct tipc_gap_ack - TIPC Gap ACK block
123 * @ack: seqno of the last consecutive packet in link deferdq
124 * @gap: number of gap packets since the last ack
127 * link deferdq: 1 2 3 4 10 11 13 14 15 20
128 * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0>
130 struct tipc_gap_ack {
135 /* struct tipc_gap_ack_blks
136 * @len: actual length of the record
137 * @gack_cnt: number of Gap ACK blocks in the record
138 * @gacks: array of Gap ACK blocks
140 struct tipc_gap_ack_blks {
144 struct tipc_gap_ack gacks[];
147 #define tipc_gap_ack_blks_sz(n) (sizeof(struct tipc_gap_ack_blks) + \
148 sizeof(struct tipc_gap_ack) * (n))
150 #define MAX_GAP_ACK_BLKS 32
151 #define MAX_GAP_ACK_BLKS_SZ tipc_gap_ack_blks_sz(MAX_GAP_ACK_BLKS)
153 static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
155 return (struct tipc_msg *)skb->data;
158 static inline u32 msg_word(struct tipc_msg *m, u32 pos)
160 return ntohl(m->hdr[pos]);
163 static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
165 m->hdr[w] = htonl(val);
168 static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
170 return (msg_word(m, w) >> pos) & mask;
173 static inline void msg_set_bits(struct tipc_msg *m, u32 w,
174 u32 pos, u32 mask, u32 val)
176 val = (val & mask) << pos;
178 m->hdr[w] &= ~htonl(mask);
179 m->hdr[w] |= htonl(val);
182 static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
184 u32 temp = msg->hdr[a];
186 msg->hdr[a] = msg->hdr[b];
193 static inline u32 msg_version(struct tipc_msg *m)
195 return msg_bits(m, 0, 29, 7);
198 static inline void msg_set_version(struct tipc_msg *m)
200 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
203 static inline u32 msg_user(struct tipc_msg *m)
205 return msg_bits(m, 0, 25, 0xf);
208 static inline u32 msg_isdata(struct tipc_msg *m)
210 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
213 static inline void msg_set_user(struct tipc_msg *m, u32 n)
215 msg_set_bits(m, 0, 25, 0xf, n);
218 static inline u32 msg_hdr_sz(struct tipc_msg *m)
220 return msg_bits(m, 0, 21, 0xf) << 2;
223 static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
225 msg_set_bits(m, 0, 21, 0xf, n>>2);
228 static inline u32 msg_size(struct tipc_msg *m)
230 return msg_bits(m, 0, 0, 0x1ffff);
233 static inline u32 msg_blocks(struct tipc_msg *m)
235 return (msg_size(m) / 1024) + 1;
238 static inline u32 msg_data_sz(struct tipc_msg *m)
240 return msg_size(m) - msg_hdr_sz(m);
243 static inline int msg_non_seq(struct tipc_msg *m)
245 return msg_bits(m, 0, 20, 1);
248 static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
250 msg_set_bits(m, 0, 20, 1, n);
253 static inline int msg_is_syn(struct tipc_msg *m)
255 return msg_bits(m, 0, 17, 1);
258 static inline void msg_set_syn(struct tipc_msg *m, u32 d)
260 msg_set_bits(m, 0, 17, 1, d);
263 static inline int msg_dest_droppable(struct tipc_msg *m)
265 return msg_bits(m, 0, 19, 1);
268 static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
270 msg_set_bits(m, 0, 19, 1, d);
273 static inline int msg_is_keepalive(struct tipc_msg *m)
275 return msg_bits(m, 0, 19, 1);
278 static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
280 msg_set_bits(m, 0, 19, 1, d);
283 static inline int msg_src_droppable(struct tipc_msg *m)
285 return msg_bits(m, 0, 18, 1);
288 static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
290 msg_set_bits(m, 0, 18, 1, d);
293 static inline bool msg_is_rcast(struct tipc_msg *m)
295 return msg_bits(m, 0, 18, 0x1);
298 static inline void msg_set_is_rcast(struct tipc_msg *m, bool d)
300 msg_set_bits(m, 0, 18, 0x1, d);
303 static inline void msg_set_size(struct tipc_msg *m, u32 sz)
305 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
308 static inline unchar *msg_data(struct tipc_msg *m)
310 return ((unchar *)m) + msg_hdr_sz(m);
313 static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m)
315 return (struct tipc_msg *)msg_data(m);
321 static inline u32 msg_type(struct tipc_msg *m)
323 return msg_bits(m, 1, 29, 0x7);
326 static inline void msg_set_type(struct tipc_msg *m, u32 n)
328 msg_set_bits(m, 1, 29, 0x7, n);
331 static inline int msg_in_group(struct tipc_msg *m)
333 int mtyp = msg_type(m);
335 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
338 static inline bool msg_is_grp_evt(struct tipc_msg *m)
340 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
343 static inline u32 msg_named(struct tipc_msg *m)
345 return msg_type(m) == TIPC_NAMED_MSG;
348 static inline u32 msg_mcast(struct tipc_msg *m)
350 int mtyp = msg_type(m);
352 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
353 (mtyp == TIPC_GRP_MCAST_MSG));
356 static inline u32 msg_connected(struct tipc_msg *m)
358 return msg_type(m) == TIPC_CONN_MSG;
361 static inline u32 msg_direct(struct tipc_msg *m)
363 return msg_type(m) == TIPC_DIRECT_MSG;
366 static inline u32 msg_errcode(struct tipc_msg *m)
368 return msg_bits(m, 1, 25, 0xf);
371 static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
373 msg_set_bits(m, 1, 25, 0xf, err);
376 static inline u32 msg_reroute_cnt(struct tipc_msg *m)
378 return msg_bits(m, 1, 21, 0xf);
381 static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
383 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
386 static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
388 msg_set_bits(m, 1, 21, 0xf, 0);
391 static inline u32 msg_lookup_scope(struct tipc_msg *m)
393 return msg_bits(m, 1, 19, 0x3);
396 static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
398 msg_set_bits(m, 1, 19, 0x3, n);
401 static inline u16 msg_bcast_ack(struct tipc_msg *m)
403 return msg_bits(m, 1, 0, 0xffff);
406 static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
408 msg_set_bits(m, 1, 0, 0xffff, n);
411 /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
412 * link peer session number
414 static inline bool msg_dest_session_valid(struct tipc_msg *m)
416 return msg_bits(m, 1, 16, 0x1);
419 static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid)
421 msg_set_bits(m, 1, 16, 0x1, valid);
424 static inline u16 msg_dest_session(struct tipc_msg *m)
426 return msg_bits(m, 1, 0, 0xffff);
429 static inline void msg_set_dest_session(struct tipc_msg *m, u16 n)
431 msg_set_bits(m, 1, 0, 0xffff, n);
437 static inline u16 msg_ack(struct tipc_msg *m)
439 return msg_bits(m, 2, 16, 0xffff);
442 static inline void msg_set_ack(struct tipc_msg *m, u16 n)
444 msg_set_bits(m, 2, 16, 0xffff, n);
447 static inline u16 msg_seqno(struct tipc_msg *m)
449 return msg_bits(m, 2, 0, 0xffff);
452 static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
454 msg_set_bits(m, 2, 0, 0xffff, n);
460 static inline u32 msg_importance(struct tipc_msg *m)
462 int usr = msg_user(m);
464 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
466 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
467 return msg_bits(m, 9, 0, 0x7);
468 return TIPC_SYSTEM_IMPORTANCE;
471 static inline void msg_set_importance(struct tipc_msg *m, u32 i)
473 int usr = msg_user(m);
475 if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)))
476 msg_set_bits(m, 9, 0, 0x7, i);
477 else if (i < TIPC_SYSTEM_IMPORTANCE)
480 pr_warn("Trying to set illegal importance in message\n");
483 static inline u32 msg_prevnode(struct tipc_msg *m)
485 return msg_word(m, 3);
488 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
490 msg_set_word(m, 3, a);
493 static inline u32 msg_origport(struct tipc_msg *m)
495 if (msg_user(m) == MSG_FRAGMENTER)
496 m = msg_inner_hdr(m);
497 return msg_word(m, 4);
500 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
502 msg_set_word(m, 4, p);
505 static inline u32 msg_destport(struct tipc_msg *m)
507 return msg_word(m, 5);
510 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
512 msg_set_word(m, 5, p);
515 static inline u32 msg_mc_netid(struct tipc_msg *m)
517 return msg_word(m, 5);
520 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
522 msg_set_word(m, 5, p);
525 static inline int msg_short(struct tipc_msg *m)
527 return msg_hdr_sz(m) == SHORT_H_SIZE;
530 static inline u32 msg_orignode(struct tipc_msg *m)
532 if (likely(msg_short(m)))
533 return msg_prevnode(m);
534 return msg_word(m, 6);
537 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
539 msg_set_word(m, 6, a);
542 static inline u32 msg_destnode(struct tipc_msg *m)
544 return msg_word(m, 7);
547 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
549 msg_set_word(m, 7, a);
552 static inline u32 msg_nametype(struct tipc_msg *m)
554 return msg_word(m, 8);
557 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
559 msg_set_word(m, 8, n);
562 static inline u32 msg_nameinst(struct tipc_msg *m)
564 return msg_word(m, 9);
567 static inline u32 msg_namelower(struct tipc_msg *m)
569 return msg_nameinst(m);
572 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
574 msg_set_word(m, 9, n);
577 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
579 msg_set_namelower(m, n);
582 static inline u32 msg_nameupper(struct tipc_msg *m)
584 return msg_word(m, 10);
587 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
589 msg_set_word(m, 10, n);
593 * Constants and routines used to read and write TIPC internal message headers
597 * Connection management protocol message types
600 #define CONN_PROBE_REPLY 1
604 * Name distributor message types
606 #define PUBLICATION 0
610 * Segmentation message types
612 #define FIRST_FRAGMENT 0
614 #define LAST_FRAGMENT 2
617 * Link management protocol message types
621 #define ACTIVATE_MSG 2
624 * Changeover tunnel message types
627 #define FAILOVER_MSG 1
630 * Config protocol message types
632 #define DSC_REQ_MSG 0
633 #define DSC_RESP_MSG 1
634 #define DSC_TRIAL_MSG 2
635 #define DSC_TRIAL_FAIL_MSG 3
638 * Group protocol message types
640 #define GRP_JOIN_MSG 0
641 #define GRP_LEAVE_MSG 1
642 #define GRP_ADV_MSG 2
643 #define GRP_ACK_MSG 3
644 #define GRP_RECLAIM_MSG 4
645 #define GRP_REMIT_MSG 5
650 static inline u32 msg_seq_gap(struct tipc_msg *m)
652 return msg_bits(m, 1, 16, 0x1fff);
655 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
657 msg_set_bits(m, 1, 16, 0x1fff, n);
660 static inline u32 msg_node_sig(struct tipc_msg *m)
662 return msg_bits(m, 1, 0, 0xffff);
665 static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
667 msg_set_bits(m, 1, 0, 0xffff, n);
670 static inline u32 msg_node_capabilities(struct tipc_msg *m)
672 return msg_bits(m, 1, 15, 0x1fff);
675 static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
677 msg_set_bits(m, 1, 15, 0x1fff, n);
683 static inline u32 msg_dest_domain(struct tipc_msg *m)
685 return msg_word(m, 2);
688 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
690 msg_set_word(m, 2, n);
693 static inline u32 msg_bcgap_after(struct tipc_msg *m)
695 return msg_bits(m, 2, 16, 0xffff);
698 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
700 msg_set_bits(m, 2, 16, 0xffff, n);
703 static inline u32 msg_bcgap_to(struct tipc_msg *m)
705 return msg_bits(m, 2, 0, 0xffff);
708 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
710 msg_set_bits(m, 2, 0, 0xffff, n);
716 static inline u32 msg_last_bcast(struct tipc_msg *m)
718 return msg_bits(m, 4, 16, 0xffff);
721 static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
723 return msg_last_bcast(m) + 1;
726 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
728 msg_set_bits(m, 4, 16, 0xffff, n);
731 static inline u32 msg_nof_fragms(struct tipc_msg *m)
733 return msg_bits(m, 4, 0, 0xffff);
736 static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n)
738 msg_set_bits(m, 4, 0, 0xffff, n);
741 static inline u32 msg_fragm_no(struct tipc_msg *m)
743 return msg_bits(m, 4, 16, 0xffff);
746 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
748 msg_set_bits(m, 4, 16, 0xffff, n);
751 static inline u16 msg_next_sent(struct tipc_msg *m)
753 return msg_bits(m, 4, 0, 0xffff);
756 static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
758 msg_set_bits(m, 4, 0, 0xffff, n);
761 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
763 msg_set_bits(m, 4, 0, 0xffff, n);
766 static inline u32 msg_bc_netid(struct tipc_msg *m)
768 return msg_word(m, 4);
771 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
773 msg_set_word(m, 4, id);
776 static inline u32 msg_link_selector(struct tipc_msg *m)
778 if (msg_user(m) == MSG_FRAGMENTER)
779 m = (void *)msg_data(m);
780 return msg_bits(m, 4, 0, 1);
786 static inline u16 msg_session(struct tipc_msg *m)
788 return msg_bits(m, 5, 16, 0xffff);
791 static inline void msg_set_session(struct tipc_msg *m, u16 n)
793 msg_set_bits(m, 5, 16, 0xffff, n);
796 static inline u32 msg_probe(struct tipc_msg *m)
798 return msg_bits(m, 5, 0, 1);
801 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
803 msg_set_bits(m, 5, 0, 1, val);
806 static inline char msg_net_plane(struct tipc_msg *m)
808 return msg_bits(m, 5, 1, 7) + 'A';
811 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
813 msg_set_bits(m, 5, 1, 7, (n - 'A'));
816 static inline u32 msg_linkprio(struct tipc_msg *m)
818 return msg_bits(m, 5, 4, 0x1f);
821 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
823 msg_set_bits(m, 5, 4, 0x1f, n);
826 static inline u32 msg_bearer_id(struct tipc_msg *m)
828 return msg_bits(m, 5, 9, 0x7);
831 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
833 msg_set_bits(m, 5, 9, 0x7, n);
836 static inline u32 msg_redundant_link(struct tipc_msg *m)
838 return msg_bits(m, 5, 12, 0x1);
841 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
843 msg_set_bits(m, 5, 12, 0x1, r);
846 static inline u32 msg_peer_stopping(struct tipc_msg *m)
848 return msg_bits(m, 5, 13, 0x1);
851 static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
853 msg_set_bits(m, 5, 13, 0x1, s);
856 static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
858 switch (msg_user(m)) {
860 case NAME_DISTRIBUTOR:
862 return msg_bits(m, 5, 14, 0x1);
868 static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
870 msg_set_bits(m, 5, 14, 0x1, invalid);
873 static inline char *msg_media_addr(struct tipc_msg *m)
875 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
878 static inline u32 msg_bc_gap(struct tipc_msg *m)
880 return msg_bits(m, 8, 0, 0x3ff);
883 static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
885 msg_set_bits(m, 8, 0, 0x3ff, n);
891 static inline u16 msg_msgcnt(struct tipc_msg *m)
893 return msg_bits(m, 9, 16, 0xffff);
896 static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
898 msg_set_bits(m, 9, 16, 0xffff, n);
901 static inline u16 msg_syncpt(struct tipc_msg *m)
903 return msg_bits(m, 9, 16, 0xffff);
906 static inline void msg_set_syncpt(struct tipc_msg *m, u16 n)
908 msg_set_bits(m, 9, 16, 0xffff, n);
911 static inline u32 msg_conn_ack(struct tipc_msg *m)
913 return msg_bits(m, 9, 16, 0xffff);
916 static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
918 msg_set_bits(m, 9, 16, 0xffff, n);
921 static inline u16 msg_adv_win(struct tipc_msg *m)
923 return msg_bits(m, 9, 0, 0xffff);
926 static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
928 msg_set_bits(m, 9, 0, 0xffff, n);
931 static inline u32 msg_max_pkt(struct tipc_msg *m)
933 return msg_bits(m, 9, 16, 0xffff) * 4;
936 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
938 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
941 static inline u32 msg_link_tolerance(struct tipc_msg *m)
943 return msg_bits(m, 9, 0, 0xffff);
946 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
948 msg_set_bits(m, 9, 0, 0xffff, n);
951 static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
953 return msg_bits(m, 9, 16, 0xffff);
956 static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
958 msg_set_bits(m, 9, 16, 0xffff, n);
961 static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
963 return msg_bits(m, 9, 16, 0xffff);
966 static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
968 msg_set_bits(m, 9, 16, 0xffff, n);
971 static inline u16 msg_grp_remitted(struct tipc_msg *m)
973 return msg_bits(m, 9, 16, 0xffff);
976 static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
978 msg_set_bits(m, 9, 16, 0xffff, n);
983 static inline u16 msg_grp_evt(struct tipc_msg *m)
985 return msg_bits(m, 10, 0, 0x3);
988 static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
990 msg_set_bits(m, 10, 0, 0x3, n);
993 static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
995 return msg_bits(m, 10, 0, 0x1);
998 static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
1000 msg_set_bits(m, 10, 0, 0x1, n);
1003 static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
1005 return msg_bits(m, 10, 16, 0xffff);
1008 static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
1010 msg_set_bits(m, 10, 16, 0xffff, n);
1013 static inline bool msg_peer_link_is_up(struct tipc_msg *m)
1015 if (likely(msg_user(m) != LINK_PROTOCOL))
1017 if (msg_type(m) == STATE_MSG)
1022 static inline bool msg_peer_node_is_up(struct tipc_msg *m)
1024 if (msg_peer_link_is_up(m))
1026 return msg_redundant_link(m);
1029 static inline bool msg_is_reset(struct tipc_msg *hdr)
1031 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
1036 static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n)
1038 msg_set_word(m, 13, n);
1041 static inline u32 msg_peer_net_hash(struct tipc_msg *m)
1043 return msg_word(m, 13);
1048 static inline u32 msg_sugg_node_addr(struct tipc_msg *m)
1050 return msg_word(m, 14);
1053 static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n)
1055 msg_set_word(m, 14, n);
1058 static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id)
1060 memcpy(msg_data(hdr), id, 16);
1063 static inline u8 *msg_node_id(struct tipc_msg *hdr)
1065 return (u8 *)msg_data(hdr);
1068 struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
1069 bool tipc_msg_validate(struct sk_buff **_skb);
1070 bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
1071 void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
1072 struct sk_buff_head *xmitq);
1073 void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
1074 u32 hsize, u32 destnode);
1075 struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
1076 uint data_sz, u32 dnode, u32 onode,
1077 u32 dport, u32 oport, int errcode);
1078 int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
1079 bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu);
1080 bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg,
1081 u32 mtu, u32 dnode);
1082 bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
1083 int tipc_msg_fragment(struct sk_buff *skb, const struct tipc_msg *hdr,
1084 int pktmax, struct sk_buff_head *frags);
1085 int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
1086 int offset, int dsz, int mtu, struct sk_buff_head *list);
1087 bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
1088 bool tipc_msg_assemble(struct sk_buff_head *list);
1089 bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
1090 bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
1091 struct sk_buff_head *cpy);
1092 void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
1093 struct sk_buff *skb);
1094 bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy);
1096 static inline u16 buf_seqno(struct sk_buff *skb)
1098 return msg_seqno(buf_msg(skb));
1101 static inline int buf_roundup_len(struct sk_buff *skb)
1103 return (skb->len / 1024 + 1) * 1024;
1106 /* tipc_skb_peek(): peek and reserve first buffer in list
1107 * @list: list to be peeked in
1108 * Returns pointer to first buffer in list, if any
1110 static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
1113 struct sk_buff *skb;
1116 skb = skb_peek(list);
1119 spin_unlock_bh(lock);
1123 /* tipc_skb_peek_port(): find a destination port, ignoring all destinations
1124 * up to and including 'filter'.
1125 * Note: ignoring previously tried destinations minimizes the risk of
1126 * contention on the socket lock
1127 * @list: list to be peeked in
1128 * @filter: last destination to be ignored from search
1129 * Returns a destination port number, of applicable.
1131 static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
1133 struct sk_buff *skb;
1137 spin_lock_bh(&list->lock);
1138 skb_queue_walk(list, skb) {
1139 dport = msg_destport(buf_msg(skb));
1140 if (!filter || skb_queue_is_last(list, skb))
1142 if (dport == filter)
1147 spin_unlock_bh(&list->lock);
1151 /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1152 * @list: list to be unlinked from
1153 * @dport: selection criteria for buffer to unlink
1155 static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1158 struct sk_buff *_skb, *tmp, *skb = NULL;
1160 spin_lock_bh(&list->lock);
1161 skb_queue_walk_safe(list, _skb, tmp) {
1162 if (msg_destport(buf_msg(_skb)) == dport) {
1163 __skb_unlink(_skb, list);
1168 spin_unlock_bh(&list->lock);
1172 /* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1173 * @list: the new list to append. Not lock protected
1174 * @head: target list. Lock protected.
1176 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1177 struct sk_buff_head *head)
1179 spin_lock_bh(&head->lock);
1180 skb_queue_splice_tail(list, head);
1181 spin_unlock_bh(&head->lock);
1184 /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1185 * @list: the new list to add. Lock protected. Will be reinitialized
1186 * @head: target list. Lock protected.
1188 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1189 struct sk_buff_head *head)
1191 struct sk_buff_head tmp;
1193 __skb_queue_head_init(&tmp);
1195 spin_lock_bh(&list->lock);
1196 skb_queue_splice_tail_init(list, &tmp);
1197 spin_unlock_bh(&list->lock);
1198 tipc_skb_queue_splice_tail(&tmp, head);
1201 /* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno
1202 * @list: list to be dequeued from
1203 * @seqno: seqno of the expected msg
1205 * returns skb dequeued from the list if its seqno is less than or equal to
1206 * the expected one, otherwise the skb is still hold
1208 * Note: must be used with appropriate locks held only
1210 static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list,
1213 struct sk_buff *skb = skb_peek(list);
1215 if (skb && less_eq(buf_seqno(skb), seqno)) {
1216 __skb_unlink(skb, list);