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
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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;
109 unsigned long retr_stamp;
116 #ifdef CONFIG_TIPC_CRYPTO
118 struct tipc_crypto *rx;
119 struct tipc_aead *last;
121 } tx_clone_ctx __packed;
127 #ifdef CONFIG_TIPC_CRYPTO
131 u8 tx_clone_deferred:1;
137 #ifdef CONFIG_TIPC_CRYPTO
142 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
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
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>
156 struct tipc_gap_ack {
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
166 struct tipc_gap_ack_blks {
170 struct tipc_gap_ack gacks[];
173 #define tipc_gap_ack_blks_sz(n) (sizeof(struct tipc_gap_ack_blks) + \
174 sizeof(struct tipc_gap_ack) * (n))
176 #define MAX_GAP_ACK_BLKS 32
177 #define MAX_GAP_ACK_BLKS_SZ tipc_gap_ack_blks_sz(MAX_GAP_ACK_BLKS)
179 static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
181 return (struct tipc_msg *)skb->data;
184 static inline u32 msg_word(struct tipc_msg *m, u32 pos)
186 return ntohl(m->hdr[pos]);
189 static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
191 m->hdr[w] = htonl(val);
194 static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
196 return (msg_word(m, w) >> pos) & mask;
199 static inline void msg_set_bits(struct tipc_msg *m, u32 w,
200 u32 pos, u32 mask, u32 val)
202 val = (val & mask) << pos;
204 m->hdr[w] &= ~htonl(mask);
205 m->hdr[w] |= htonl(val);
208 static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
210 u32 temp = msg->hdr[a];
212 msg->hdr[a] = msg->hdr[b];
219 static inline u32 msg_version(struct tipc_msg *m)
221 return msg_bits(m, 0, 29, 7);
224 static inline void msg_set_version(struct tipc_msg *m)
226 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
229 static inline u32 msg_user(struct tipc_msg *m)
231 return msg_bits(m, 0, 25, 0xf);
234 static inline u32 msg_isdata(struct tipc_msg *m)
236 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
239 static inline void msg_set_user(struct tipc_msg *m, u32 n)
241 msg_set_bits(m, 0, 25, 0xf, n);
244 static inline u32 msg_hdr_sz(struct tipc_msg *m)
246 return msg_bits(m, 0, 21, 0xf) << 2;
249 static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
251 msg_set_bits(m, 0, 21, 0xf, n>>2);
254 static inline u32 msg_size(struct tipc_msg *m)
256 return msg_bits(m, 0, 0, 0x1ffff);
259 static inline u32 msg_blocks(struct tipc_msg *m)
261 return (msg_size(m) / 1024) + 1;
264 static inline u32 msg_data_sz(struct tipc_msg *m)
266 return msg_size(m) - msg_hdr_sz(m);
269 static inline int msg_non_seq(struct tipc_msg *m)
271 return msg_bits(m, 0, 20, 1);
274 static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
276 msg_set_bits(m, 0, 20, 1, n);
279 static inline int msg_is_syn(struct tipc_msg *m)
281 return msg_bits(m, 0, 17, 1);
284 static inline void msg_set_syn(struct tipc_msg *m, u32 d)
286 msg_set_bits(m, 0, 17, 1, d);
289 static inline int msg_dest_droppable(struct tipc_msg *m)
291 return msg_bits(m, 0, 19, 1);
294 static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
296 msg_set_bits(m, 0, 19, 1, d);
299 static inline int msg_is_keepalive(struct tipc_msg *m)
301 return msg_bits(m, 0, 19, 1);
304 static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
306 msg_set_bits(m, 0, 19, 1, d);
309 static inline int msg_src_droppable(struct tipc_msg *m)
311 return msg_bits(m, 0, 18, 1);
314 static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
316 msg_set_bits(m, 0, 18, 1, d);
319 static inline int msg_ack_required(struct tipc_msg *m)
321 return msg_bits(m, 0, 18, 1);
324 static inline void msg_set_ack_required(struct tipc_msg *m, u32 d)
326 msg_set_bits(m, 0, 18, 1, d);
329 static inline bool msg_is_rcast(struct tipc_msg *m)
331 return msg_bits(m, 0, 18, 0x1);
334 static inline void msg_set_is_rcast(struct tipc_msg *m, bool d)
336 msg_set_bits(m, 0, 18, 0x1, d);
339 static inline void msg_set_size(struct tipc_msg *m, u32 sz)
341 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
344 static inline unchar *msg_data(struct tipc_msg *m)
346 return ((unchar *)m) + msg_hdr_sz(m);
349 static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m)
351 return (struct tipc_msg *)msg_data(m);
357 static inline u32 msg_type(struct tipc_msg *m)
359 return msg_bits(m, 1, 29, 0x7);
362 static inline void msg_set_type(struct tipc_msg *m, u32 n)
364 msg_set_bits(m, 1, 29, 0x7, n);
367 static inline int msg_in_group(struct tipc_msg *m)
369 int mtyp = msg_type(m);
371 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
374 static inline bool msg_is_grp_evt(struct tipc_msg *m)
376 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
379 static inline u32 msg_named(struct tipc_msg *m)
381 return msg_type(m) == TIPC_NAMED_MSG;
384 static inline u32 msg_mcast(struct tipc_msg *m)
386 int mtyp = msg_type(m);
388 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
389 (mtyp == TIPC_GRP_MCAST_MSG));
392 static inline u32 msg_connected(struct tipc_msg *m)
394 return msg_type(m) == TIPC_CONN_MSG;
397 static inline u32 msg_direct(struct tipc_msg *m)
399 return msg_type(m) == TIPC_DIRECT_MSG;
402 static inline u32 msg_errcode(struct tipc_msg *m)
404 return msg_bits(m, 1, 25, 0xf);
407 static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
409 msg_set_bits(m, 1, 25, 0xf, err);
412 static inline u32 msg_reroute_cnt(struct tipc_msg *m)
414 return msg_bits(m, 1, 21, 0xf);
417 static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
419 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
422 static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
424 msg_set_bits(m, 1, 21, 0xf, 0);
427 static inline u32 msg_lookup_scope(struct tipc_msg *m)
429 return msg_bits(m, 1, 19, 0x3);
432 static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
434 msg_set_bits(m, 1, 19, 0x3, n);
437 static inline u16 msg_bcast_ack(struct tipc_msg *m)
439 return msg_bits(m, 1, 0, 0xffff);
442 static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
444 msg_set_bits(m, 1, 0, 0xffff, n);
447 /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
448 * link peer session number
450 static inline bool msg_dest_session_valid(struct tipc_msg *m)
452 return msg_bits(m, 1, 16, 0x1);
455 static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid)
457 msg_set_bits(m, 1, 16, 0x1, valid);
460 static inline u16 msg_dest_session(struct tipc_msg *m)
462 return msg_bits(m, 1, 0, 0xffff);
465 static inline void msg_set_dest_session(struct tipc_msg *m, u16 n)
467 msg_set_bits(m, 1, 0, 0xffff, n);
473 static inline u16 msg_ack(struct tipc_msg *m)
475 return msg_bits(m, 2, 16, 0xffff);
478 static inline void msg_set_ack(struct tipc_msg *m, u16 n)
480 msg_set_bits(m, 2, 16, 0xffff, n);
483 static inline u16 msg_seqno(struct tipc_msg *m)
485 return msg_bits(m, 2, 0, 0xffff);
488 static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
490 msg_set_bits(m, 2, 0, 0xffff, n);
496 static inline u32 msg_importance(struct tipc_msg *m)
498 int usr = msg_user(m);
500 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
502 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
503 return msg_bits(m, 9, 0, 0x7);
504 return TIPC_SYSTEM_IMPORTANCE;
507 static inline void msg_set_importance(struct tipc_msg *m, u32 i)
509 int usr = msg_user(m);
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)
516 pr_warn("Trying to set illegal importance in message\n");
519 static inline u32 msg_prevnode(struct tipc_msg *m)
521 return msg_word(m, 3);
524 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
526 msg_set_word(m, 3, a);
529 static inline u32 msg_origport(struct tipc_msg *m)
531 if (msg_user(m) == MSG_FRAGMENTER)
532 m = msg_inner_hdr(m);
533 return msg_word(m, 4);
536 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
538 msg_set_word(m, 4, p);
541 static inline u32 msg_destport(struct tipc_msg *m)
543 return msg_word(m, 5);
546 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
548 msg_set_word(m, 5, p);
551 static inline u32 msg_mc_netid(struct tipc_msg *m)
553 return msg_word(m, 5);
556 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
558 msg_set_word(m, 5, p);
561 static inline int msg_short(struct tipc_msg *m)
563 return msg_hdr_sz(m) == SHORT_H_SIZE;
566 static inline u32 msg_orignode(struct tipc_msg *m)
568 if (likely(msg_short(m)))
569 return msg_prevnode(m);
570 return msg_word(m, 6);
573 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
575 msg_set_word(m, 6, a);
578 static inline u32 msg_destnode(struct tipc_msg *m)
580 return msg_word(m, 7);
583 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
585 msg_set_word(m, 7, a);
588 static inline u32 msg_nametype(struct tipc_msg *m)
590 return msg_word(m, 8);
593 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
595 msg_set_word(m, 8, n);
598 static inline u32 msg_nameinst(struct tipc_msg *m)
600 return msg_word(m, 9);
603 static inline u32 msg_namelower(struct tipc_msg *m)
605 return msg_nameinst(m);
608 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
610 msg_set_word(m, 9, n);
613 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
615 msg_set_namelower(m, n);
618 static inline u32 msg_nameupper(struct tipc_msg *m)
620 return msg_word(m, 10);
623 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
625 msg_set_word(m, 10, n);
629 * Constants and routines used to read and write TIPC internal message headers
633 * Connection management protocol message types
636 #define CONN_PROBE_REPLY 1
640 * Name distributor message types
642 #define PUBLICATION 0
646 * Segmentation message types
648 #define FIRST_FRAGMENT 0
650 #define LAST_FRAGMENT 2
653 * Link management protocol message types
657 #define ACTIVATE_MSG 2
660 * Changeover tunnel message types
663 #define FAILOVER_MSG 1
666 * Config protocol message types
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
674 * Group protocol message types
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
686 static inline u32 msg_seq_gap(struct tipc_msg *m)
688 return msg_bits(m, 1, 16, 0x1fff);
691 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
693 msg_set_bits(m, 1, 16, 0x1fff, n);
696 static inline u32 msg_node_sig(struct tipc_msg *m)
698 return msg_bits(m, 1, 0, 0xffff);
701 static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
703 msg_set_bits(m, 1, 0, 0xffff, n);
706 static inline u32 msg_node_capabilities(struct tipc_msg *m)
708 return msg_bits(m, 1, 15, 0x1fff);
711 static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
713 msg_set_bits(m, 1, 15, 0x1fff, n);
719 static inline u32 msg_dest_domain(struct tipc_msg *m)
721 return msg_word(m, 2);
724 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
726 msg_set_word(m, 2, n);
729 static inline u32 msg_bcgap_after(struct tipc_msg *m)
731 return msg_bits(m, 2, 16, 0xffff);
734 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
736 msg_set_bits(m, 2, 16, 0xffff, n);
739 static inline u32 msg_bcgap_to(struct tipc_msg *m)
741 return msg_bits(m, 2, 0, 0xffff);
744 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
746 msg_set_bits(m, 2, 0, 0xffff, n);
752 static inline u32 msg_last_bcast(struct tipc_msg *m)
754 return msg_bits(m, 4, 16, 0xffff);
757 static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
759 return msg_last_bcast(m) + 1;
762 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
764 msg_set_bits(m, 4, 16, 0xffff, n);
767 static inline u32 msg_nof_fragms(struct tipc_msg *m)
769 return msg_bits(m, 4, 0, 0xffff);
772 static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n)
774 msg_set_bits(m, 4, 0, 0xffff, n);
777 static inline u32 msg_fragm_no(struct tipc_msg *m)
779 return msg_bits(m, 4, 16, 0xffff);
782 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
784 msg_set_bits(m, 4, 16, 0xffff, n);
787 static inline u16 msg_next_sent(struct tipc_msg *m)
789 return msg_bits(m, 4, 0, 0xffff);
792 static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
794 msg_set_bits(m, 4, 0, 0xffff, n);
797 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
799 msg_set_bits(m, 4, 0, 0xffff, n);
802 static inline u32 msg_bc_netid(struct tipc_msg *m)
804 return msg_word(m, 4);
807 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
809 msg_set_word(m, 4, id);
812 static inline u32 msg_link_selector(struct tipc_msg *m)
814 if (msg_user(m) == MSG_FRAGMENTER)
815 m = (void *)msg_data(m);
816 return msg_bits(m, 4, 0, 1);
822 static inline u16 msg_session(struct tipc_msg *m)
824 return msg_bits(m, 5, 16, 0xffff);
827 static inline void msg_set_session(struct tipc_msg *m, u16 n)
829 msg_set_bits(m, 5, 16, 0xffff, n);
832 static inline u32 msg_probe(struct tipc_msg *m)
834 return msg_bits(m, 5, 0, 1);
837 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
839 msg_set_bits(m, 5, 0, 1, val);
842 static inline char msg_net_plane(struct tipc_msg *m)
844 return msg_bits(m, 5, 1, 7) + 'A';
847 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
849 msg_set_bits(m, 5, 1, 7, (n - 'A'));
852 static inline u32 msg_linkprio(struct tipc_msg *m)
854 return msg_bits(m, 5, 4, 0x1f);
857 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
859 msg_set_bits(m, 5, 4, 0x1f, n);
862 static inline u32 msg_bearer_id(struct tipc_msg *m)
864 return msg_bits(m, 5, 9, 0x7);
867 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
869 msg_set_bits(m, 5, 9, 0x7, n);
872 static inline u32 msg_redundant_link(struct tipc_msg *m)
874 return msg_bits(m, 5, 12, 0x1);
877 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
879 msg_set_bits(m, 5, 12, 0x1, r);
882 static inline u32 msg_peer_stopping(struct tipc_msg *m)
884 return msg_bits(m, 5, 13, 0x1);
887 static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
889 msg_set_bits(m, 5, 13, 0x1, s);
892 static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
894 switch (msg_user(m)) {
896 case NAME_DISTRIBUTOR:
898 return msg_bits(m, 5, 14, 0x1);
904 static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
906 msg_set_bits(m, 5, 14, 0x1, invalid);
909 static inline char *msg_media_addr(struct tipc_msg *m)
911 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
914 static inline u32 msg_bc_gap(struct tipc_msg *m)
916 return msg_bits(m, 8, 0, 0x3ff);
919 static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
921 msg_set_bits(m, 8, 0, 0x3ff, n);
927 static inline u16 msg_msgcnt(struct tipc_msg *m)
929 return msg_bits(m, 9, 16, 0xffff);
932 static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
934 msg_set_bits(m, 9, 16, 0xffff, n);
937 static inline u16 msg_syncpt(struct tipc_msg *m)
939 return msg_bits(m, 9, 16, 0xffff);
942 static inline void msg_set_syncpt(struct tipc_msg *m, u16 n)
944 msg_set_bits(m, 9, 16, 0xffff, n);
947 static inline u32 msg_conn_ack(struct tipc_msg *m)
949 return msg_bits(m, 9, 16, 0xffff);
952 static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
954 msg_set_bits(m, 9, 16, 0xffff, n);
957 static inline u16 msg_adv_win(struct tipc_msg *m)
959 return msg_bits(m, 9, 0, 0xffff);
962 static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
964 msg_set_bits(m, 9, 0, 0xffff, n);
967 static inline u32 msg_max_pkt(struct tipc_msg *m)
969 return msg_bits(m, 9, 16, 0xffff) * 4;
972 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
974 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
977 static inline u32 msg_link_tolerance(struct tipc_msg *m)
979 return msg_bits(m, 9, 0, 0xffff);
982 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
984 msg_set_bits(m, 9, 0, 0xffff, n);
987 static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
989 return msg_bits(m, 9, 16, 0xffff);
992 static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
994 msg_set_bits(m, 9, 16, 0xffff, n);
997 static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
999 return msg_bits(m, 9, 16, 0xffff);
1002 static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
1004 msg_set_bits(m, 9, 16, 0xffff, n);
1007 static inline u16 msg_grp_remitted(struct tipc_msg *m)
1009 return msg_bits(m, 9, 16, 0xffff);
1012 static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
1014 msg_set_bits(m, 9, 16, 0xffff, n);
1019 static inline u16 msg_grp_evt(struct tipc_msg *m)
1021 return msg_bits(m, 10, 0, 0x3);
1024 static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
1026 msg_set_bits(m, 10, 0, 0x3, n);
1029 static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
1031 return msg_bits(m, 10, 0, 0x1);
1034 static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
1036 msg_set_bits(m, 10, 0, 0x1, n);
1039 static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
1041 return msg_bits(m, 10, 16, 0xffff);
1044 static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
1046 msg_set_bits(m, 10, 16, 0xffff, n);
1049 static inline bool msg_peer_link_is_up(struct tipc_msg *m)
1051 if (likely(msg_user(m) != LINK_PROTOCOL))
1053 if (msg_type(m) == STATE_MSG)
1058 static inline bool msg_peer_node_is_up(struct tipc_msg *m)
1060 if (msg_peer_link_is_up(m))
1062 return msg_redundant_link(m);
1065 static inline bool msg_is_reset(struct tipc_msg *hdr)
1067 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
1072 static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n)
1074 msg_set_word(m, 13, n);
1077 static inline u32 msg_peer_net_hash(struct tipc_msg *m)
1079 return msg_word(m, 13);
1084 static inline u32 msg_sugg_node_addr(struct tipc_msg *m)
1086 return msg_word(m, 14);
1089 static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n)
1091 msg_set_word(m, 14, n);
1094 static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id)
1096 memcpy(msg_data(hdr), id, 16);
1099 static inline u8 *msg_node_id(struct tipc_msg *hdr)
1101 return (u8 *)msg_data(hdr);
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);
1133 static inline u16 buf_seqno(struct sk_buff *skb)
1135 return msg_seqno(buf_msg(skb));
1138 static inline int buf_roundup_len(struct sk_buff *skb)
1140 return (skb->len / 1024 + 1) * 1024;
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
1147 static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
1150 struct sk_buff *skb;
1153 skb = skb_peek(list);
1156 spin_unlock_bh(lock);
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.
1168 static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
1170 struct sk_buff *skb;
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))
1179 if (dport == filter)
1184 spin_unlock_bh(&list->lock);
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
1192 static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1195 struct sk_buff *_skb, *tmp, *skb = NULL;
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);
1205 spin_unlock_bh(&list->lock);
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.
1213 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1214 struct sk_buff_head *head)
1216 spin_lock_bh(&head->lock);
1217 skb_queue_splice_tail(list, head);
1218 spin_unlock_bh(&head->lock);
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.
1225 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1226 struct sk_buff_head *head)
1228 struct sk_buff_head tmp;
1230 __skb_queue_head_init(&tmp);
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);
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
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
1245 * Note: must be used with appropriate locks held only
1247 static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list,
1250 struct sk_buff *skb = skb_peek(list);
1252 if (skb && less_eq(buf_seqno(skb), seqno)) {
1253 __skb_unlink(skb, list);