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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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
86 #define SOCK_WAKEUP 14 /* pseudo user */
87 #define TOP_SRV 15 /* pseudo user */
90 * Message header sizes
92 #define SHORT_H_SIZE 24 /* In-cluster basic payload message */
93 #define BASIC_H_SIZE 32 /* Basic payload message */
94 #define NAMED_H_SIZE 40 /* Named payload message */
95 #define MCAST_H_SIZE 44 /* Multicast payload message */
96 #define GROUP_H_SIZE 44 /* Group payload message */
97 #define INT_H_SIZE 40 /* Internal messages */
98 #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */
99 #define MAX_H_SIZE 60 /* Largest possible TIPC header size */
101 #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
102 #define TIPC_MEDIA_INFO_OFFSET 5
104 extern const int one_page_mtu;
109 struct sk_buff *tail;
110 unsigned long nxt_retr;
111 unsigned long retr_stamp;
118 #ifdef CONFIG_TIPC_CRYPTO
120 struct tipc_crypto *rx;
121 struct tipc_aead *last;
123 } tx_clone_ctx __packed;
129 #ifdef CONFIG_TIPC_CRYPTO
132 #define SKB_PROBING 1
133 #define SKB_GRACING 2
135 u8 tx_clone_deferred:1;
141 #ifdef CONFIG_TIPC_CRYPTO
146 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
152 /* struct tipc_gap_ack - TIPC Gap ACK block
153 * @ack: seqno of the last consecutive packet in link deferdq
154 * @gap: number of gap packets since the last ack
157 * link deferdq: 1 2 3 4 10 11 13 14 15 20
158 * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0>
160 struct tipc_gap_ack {
165 /* struct tipc_gap_ack_blks
166 * @len: actual length of the record
167 * @ugack_cnt: number of Gap ACK blocks for unicast (following the broadcast
169 * @start_index: starting index for "valid" broadcast Gap ACK blocks
170 * @bgack_cnt: number of Gap ACK blocks for broadcast in the record
171 * @gacks: array of Gap ACK blocks
174 * +-------------+-------------+-------------+-------------+
175 * | bgack_cnt | ugack_cnt | len |
176 * +-------------+-------------+-------------+-------------+ -
178 * +-------------+-------------+-------------+-------------+ > bc gacks
180 * +-------------+-------------+-------------+-------------+ -
182 * +-------------+-------------+-------------+-------------+ > uc gacks
184 * +-------------+-------------+-------------+-------------+ -
186 struct tipc_gap_ack_blks {
193 struct tipc_gap_ack gacks[];
196 #define MAX_GAP_ACK_BLKS 128
197 #define MAX_GAP_ACK_BLKS_SZ (sizeof(struct tipc_gap_ack_blks) + \
198 sizeof(struct tipc_gap_ack) * MAX_GAP_ACK_BLKS)
200 static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
202 return (struct tipc_msg *)skb->data;
205 static inline u32 msg_word(struct tipc_msg *m, u32 pos)
207 return ntohl(m->hdr[pos]);
210 static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
212 m->hdr[w] = htonl(val);
215 static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
217 return (msg_word(m, w) >> pos) & mask;
220 static inline void msg_set_bits(struct tipc_msg *m, u32 w,
221 u32 pos, u32 mask, u32 val)
223 val = (val & mask) << pos;
225 m->hdr[w] &= ~htonl(mask);
226 m->hdr[w] |= htonl(val);
232 static inline u32 msg_version(struct tipc_msg *m)
234 return msg_bits(m, 0, 29, 7);
237 static inline void msg_set_version(struct tipc_msg *m)
239 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
242 static inline u32 msg_user(struct tipc_msg *m)
244 return msg_bits(m, 0, 25, 0xf);
247 static inline u32 msg_isdata(struct tipc_msg *m)
249 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
252 static inline void msg_set_user(struct tipc_msg *m, u32 n)
254 msg_set_bits(m, 0, 25, 0xf, n);
257 static inline u32 msg_hdr_sz(struct tipc_msg *m)
259 return msg_bits(m, 0, 21, 0xf) << 2;
262 static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
264 msg_set_bits(m, 0, 21, 0xf, n>>2);
267 static inline u32 msg_size(struct tipc_msg *m)
269 return msg_bits(m, 0, 0, 0x1ffff);
272 static inline u32 msg_blocks(struct tipc_msg *m)
274 return (msg_size(m) / 1024) + 1;
277 static inline u32 msg_data_sz(struct tipc_msg *m)
279 return msg_size(m) - msg_hdr_sz(m);
282 static inline int msg_non_seq(struct tipc_msg *m)
284 return msg_bits(m, 0, 20, 1);
287 static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
289 msg_set_bits(m, 0, 20, 1, n);
292 static inline int msg_is_syn(struct tipc_msg *m)
294 return msg_bits(m, 0, 17, 1);
297 static inline void msg_set_syn(struct tipc_msg *m, u32 d)
299 msg_set_bits(m, 0, 17, 1, d);
302 static inline int msg_dest_droppable(struct tipc_msg *m)
304 return msg_bits(m, 0, 19, 1);
307 static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
309 msg_set_bits(m, 0, 19, 1, d);
312 static inline int msg_is_keepalive(struct tipc_msg *m)
314 return msg_bits(m, 0, 19, 1);
317 static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
319 msg_set_bits(m, 0, 19, 1, d);
322 static inline int msg_src_droppable(struct tipc_msg *m)
324 return msg_bits(m, 0, 18, 1);
327 static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
329 msg_set_bits(m, 0, 18, 1, d);
332 static inline int msg_ack_required(struct tipc_msg *m)
334 return msg_bits(m, 0, 18, 1);
337 static inline void msg_set_ack_required(struct tipc_msg *m)
339 msg_set_bits(m, 0, 18, 1, 1);
342 static inline int msg_nagle_ack(struct tipc_msg *m)
344 return msg_bits(m, 0, 18, 1);
347 static inline void msg_set_nagle_ack(struct tipc_msg *m)
349 msg_set_bits(m, 0, 18, 1, 1);
352 static inline bool msg_is_rcast(struct tipc_msg *m)
354 return msg_bits(m, 0, 18, 0x1);
357 static inline void msg_set_is_rcast(struct tipc_msg *m, bool d)
359 msg_set_bits(m, 0, 18, 0x1, d);
362 static inline void msg_set_size(struct tipc_msg *m, u32 sz)
364 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
367 static inline unchar *msg_data(struct tipc_msg *m)
369 return ((unchar *)m) + msg_hdr_sz(m);
372 static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m)
374 return (struct tipc_msg *)msg_data(m);
380 static inline u32 msg_type(struct tipc_msg *m)
382 return msg_bits(m, 1, 29, 0x7);
385 static inline void msg_set_type(struct tipc_msg *m, u32 n)
387 msg_set_bits(m, 1, 29, 0x7, n);
390 static inline int msg_in_group(struct tipc_msg *m)
392 int mtyp = msg_type(m);
394 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
397 static inline bool msg_is_grp_evt(struct tipc_msg *m)
399 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
402 static inline u32 msg_named(struct tipc_msg *m)
404 return msg_type(m) == TIPC_NAMED_MSG;
407 static inline u32 msg_mcast(struct tipc_msg *m)
409 int mtyp = msg_type(m);
411 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
412 (mtyp == TIPC_GRP_MCAST_MSG));
415 static inline u32 msg_connected(struct tipc_msg *m)
417 return msg_type(m) == TIPC_CONN_MSG;
420 static inline u32 msg_direct(struct tipc_msg *m)
422 return msg_type(m) == TIPC_DIRECT_MSG;
425 static inline u32 msg_errcode(struct tipc_msg *m)
427 return msg_bits(m, 1, 25, 0xf);
430 static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
432 msg_set_bits(m, 1, 25, 0xf, err);
435 static inline void msg_set_bulk(struct tipc_msg *m)
437 msg_set_bits(m, 1, 28, 0x1, 1);
440 static inline u32 msg_is_bulk(struct tipc_msg *m)
442 return msg_bits(m, 1, 28, 0x1);
445 static inline void msg_set_last_bulk(struct tipc_msg *m)
447 msg_set_bits(m, 1, 27, 0x1, 1);
450 static inline u32 msg_is_last_bulk(struct tipc_msg *m)
452 return msg_bits(m, 1, 27, 0x1);
455 static inline void msg_set_non_legacy(struct tipc_msg *m)
457 msg_set_bits(m, 1, 26, 0x1, 1);
460 static inline u32 msg_is_legacy(struct tipc_msg *m)
462 return !msg_bits(m, 1, 26, 0x1);
465 static inline u32 msg_reroute_cnt(struct tipc_msg *m)
467 return msg_bits(m, 1, 21, 0xf);
470 static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
472 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
475 static inline u32 msg_lookup_scope(struct tipc_msg *m)
477 return msg_bits(m, 1, 19, 0x3);
480 static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
482 msg_set_bits(m, 1, 19, 0x3, n);
485 static inline u16 msg_bcast_ack(struct tipc_msg *m)
487 return msg_bits(m, 1, 0, 0xffff);
490 static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
492 msg_set_bits(m, 1, 0, 0xffff, n);
495 /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
496 * link peer session number
498 static inline bool msg_dest_session_valid(struct tipc_msg *m)
500 return msg_bits(m, 1, 16, 0x1);
503 static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid)
505 msg_set_bits(m, 1, 16, 0x1, valid);
508 static inline u16 msg_dest_session(struct tipc_msg *m)
510 return msg_bits(m, 1, 0, 0xffff);
513 static inline void msg_set_dest_session(struct tipc_msg *m, u16 n)
515 msg_set_bits(m, 1, 0, 0xffff, n);
521 static inline u16 msg_ack(struct tipc_msg *m)
523 return msg_bits(m, 2, 16, 0xffff);
526 static inline void msg_set_ack(struct tipc_msg *m, u16 n)
528 msg_set_bits(m, 2, 16, 0xffff, n);
531 static inline u16 msg_seqno(struct tipc_msg *m)
533 return msg_bits(m, 2, 0, 0xffff);
536 static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
538 msg_set_bits(m, 2, 0, 0xffff, n);
544 static inline u32 msg_importance(struct tipc_msg *m)
546 int usr = msg_user(m);
548 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
550 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
551 return msg_bits(m, 9, 0, 0x7);
552 return TIPC_SYSTEM_IMPORTANCE;
555 static inline void msg_set_importance(struct tipc_msg *m, u32 i)
557 int usr = msg_user(m);
559 if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)))
560 msg_set_bits(m, 9, 0, 0x7, i);
561 else if (i < TIPC_SYSTEM_IMPORTANCE)
564 pr_warn("Trying to set illegal importance in message\n");
567 static inline u32 msg_prevnode(struct tipc_msg *m)
569 return msg_word(m, 3);
572 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
574 msg_set_word(m, 3, a);
577 static inline u32 msg_origport(struct tipc_msg *m)
579 if (msg_user(m) == MSG_FRAGMENTER)
580 m = msg_inner_hdr(m);
581 return msg_word(m, 4);
584 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
586 msg_set_word(m, 4, p);
589 static inline u16 msg_named_seqno(struct tipc_msg *m)
591 return msg_bits(m, 4, 0, 0xffff);
594 static inline void msg_set_named_seqno(struct tipc_msg *m, u16 n)
596 msg_set_bits(m, 4, 0, 0xffff, n);
599 static inline u32 msg_destport(struct tipc_msg *m)
601 return msg_word(m, 5);
604 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
606 msg_set_word(m, 5, p);
609 static inline u32 msg_mc_netid(struct tipc_msg *m)
611 return msg_word(m, 5);
614 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
616 msg_set_word(m, 5, p);
619 static inline int msg_short(struct tipc_msg *m)
621 return msg_hdr_sz(m) == SHORT_H_SIZE;
624 static inline u32 msg_orignode(struct tipc_msg *m)
626 if (likely(msg_short(m)))
627 return msg_prevnode(m);
628 return msg_word(m, 6);
631 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
633 msg_set_word(m, 6, a);
636 static inline u32 msg_destnode(struct tipc_msg *m)
638 return msg_word(m, 7);
641 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
643 msg_set_word(m, 7, a);
646 static inline u32 msg_nametype(struct tipc_msg *m)
648 return msg_word(m, 8);
651 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
653 msg_set_word(m, 8, n);
656 static inline u32 msg_nameinst(struct tipc_msg *m)
658 return msg_word(m, 9);
661 static inline u32 msg_namelower(struct tipc_msg *m)
663 return msg_nameinst(m);
666 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
668 msg_set_word(m, 9, n);
671 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
673 msg_set_namelower(m, n);
676 static inline u32 msg_nameupper(struct tipc_msg *m)
678 return msg_word(m, 10);
681 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
683 msg_set_word(m, 10, n);
687 * Constants and routines used to read and write TIPC internal message headers
691 * Connection management protocol message types
694 #define CONN_PROBE_REPLY 1
698 * Name distributor message types
700 #define PUBLICATION 0
704 * Segmentation message types
706 #define FIRST_FRAGMENT 0
708 #define LAST_FRAGMENT 2
711 * Link management protocol message types
715 #define ACTIVATE_MSG 2
718 * Changeover tunnel message types
721 #define FAILOVER_MSG 1
724 * Config protocol message types
726 #define DSC_REQ_MSG 0
727 #define DSC_RESP_MSG 1
728 #define DSC_TRIAL_MSG 2
729 #define DSC_TRIAL_FAIL_MSG 3
732 * Group protocol message types
734 #define GRP_JOIN_MSG 0
735 #define GRP_LEAVE_MSG 1
736 #define GRP_ADV_MSG 2
737 #define GRP_ACK_MSG 3
738 #define GRP_RECLAIM_MSG 4
739 #define GRP_REMIT_MSG 5
741 /* Crypto message types */
742 #define KEY_DISTR_MSG 0
747 static inline u32 msg_seq_gap(struct tipc_msg *m)
749 return msg_bits(m, 1, 16, 0x1fff);
752 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
754 msg_set_bits(m, 1, 16, 0x1fff, n);
757 static inline u32 msg_node_sig(struct tipc_msg *m)
759 return msg_bits(m, 1, 0, 0xffff);
762 static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
764 msg_set_bits(m, 1, 0, 0xffff, n);
767 static inline u32 msg_node_capabilities(struct tipc_msg *m)
769 return msg_bits(m, 1, 15, 0x1fff);
772 static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
774 msg_set_bits(m, 1, 15, 0x1fff, n);
780 static inline u32 msg_dest_domain(struct tipc_msg *m)
782 return msg_word(m, 2);
785 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
787 msg_set_word(m, 2, n);
790 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
792 msg_set_bits(m, 2, 16, 0xffff, n);
795 static inline u32 msg_bcgap_to(struct tipc_msg *m)
797 return msg_bits(m, 2, 0, 0xffff);
800 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
802 msg_set_bits(m, 2, 0, 0xffff, n);
808 static inline u32 msg_last_bcast(struct tipc_msg *m)
810 return msg_bits(m, 4, 16, 0xffff);
813 static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
815 return msg_last_bcast(m) + 1;
818 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
820 msg_set_bits(m, 4, 16, 0xffff, n);
823 static inline u32 msg_nof_fragms(struct tipc_msg *m)
825 return msg_bits(m, 4, 0, 0xffff);
828 static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n)
830 msg_set_bits(m, 4, 0, 0xffff, n);
833 static inline u32 msg_fragm_no(struct tipc_msg *m)
835 return msg_bits(m, 4, 16, 0xffff);
838 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
840 msg_set_bits(m, 4, 16, 0xffff, n);
843 static inline u16 msg_next_sent(struct tipc_msg *m)
845 return msg_bits(m, 4, 0, 0xffff);
848 static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
850 msg_set_bits(m, 4, 0, 0xffff, n);
853 static inline u32 msg_bc_netid(struct tipc_msg *m)
855 return msg_word(m, 4);
858 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
860 msg_set_word(m, 4, id);
863 static inline u32 msg_link_selector(struct tipc_msg *m)
865 if (msg_user(m) == MSG_FRAGMENTER)
866 m = (void *)msg_data(m);
867 return msg_bits(m, 4, 0, 1);
873 static inline u16 msg_session(struct tipc_msg *m)
875 return msg_bits(m, 5, 16, 0xffff);
878 static inline void msg_set_session(struct tipc_msg *m, u16 n)
880 msg_set_bits(m, 5, 16, 0xffff, n);
883 static inline u32 msg_probe(struct tipc_msg *m)
885 return msg_bits(m, 5, 0, 1);
888 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
890 msg_set_bits(m, 5, 0, 1, val);
893 static inline char msg_net_plane(struct tipc_msg *m)
895 return msg_bits(m, 5, 1, 7) + 'A';
898 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
900 msg_set_bits(m, 5, 1, 7, (n - 'A'));
903 static inline u32 msg_linkprio(struct tipc_msg *m)
905 return msg_bits(m, 5, 4, 0x1f);
908 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
910 msg_set_bits(m, 5, 4, 0x1f, n);
913 static inline u32 msg_bearer_id(struct tipc_msg *m)
915 return msg_bits(m, 5, 9, 0x7);
918 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
920 msg_set_bits(m, 5, 9, 0x7, n);
923 static inline u32 msg_redundant_link(struct tipc_msg *m)
925 return msg_bits(m, 5, 12, 0x1);
928 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
930 msg_set_bits(m, 5, 12, 0x1, r);
933 static inline u32 msg_peer_stopping(struct tipc_msg *m)
935 return msg_bits(m, 5, 13, 0x1);
938 static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
940 msg_set_bits(m, 5, 13, 0x1, s);
943 static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
945 switch (msg_user(m)) {
947 case NAME_DISTRIBUTOR:
949 return msg_bits(m, 5, 14, 0x1);
955 static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
957 msg_set_bits(m, 5, 14, 0x1, invalid);
960 static inline char *msg_media_addr(struct tipc_msg *m)
962 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
965 static inline u32 msg_bc_gap(struct tipc_msg *m)
967 return msg_bits(m, 8, 0, 0x3ff);
970 static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
972 msg_set_bits(m, 8, 0, 0x3ff, n);
978 static inline u16 msg_msgcnt(struct tipc_msg *m)
980 return msg_bits(m, 9, 16, 0xffff);
983 static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
985 msg_set_bits(m, 9, 16, 0xffff, n);
988 static inline u16 msg_syncpt(struct tipc_msg *m)
990 return msg_bits(m, 9, 16, 0xffff);
993 static inline void msg_set_syncpt(struct tipc_msg *m, u16 n)
995 msg_set_bits(m, 9, 16, 0xffff, n);
998 static inline u32 msg_conn_ack(struct tipc_msg *m)
1000 return msg_bits(m, 9, 16, 0xffff);
1003 static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
1005 msg_set_bits(m, 9, 16, 0xffff, n);
1008 static inline u16 msg_adv_win(struct tipc_msg *m)
1010 return msg_bits(m, 9, 0, 0xffff);
1013 static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
1015 msg_set_bits(m, 9, 0, 0xffff, n);
1018 static inline u32 msg_max_pkt(struct tipc_msg *m)
1020 return msg_bits(m, 9, 16, 0xffff) * 4;
1023 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
1025 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
1028 static inline u32 msg_link_tolerance(struct tipc_msg *m)
1030 return msg_bits(m, 9, 0, 0xffff);
1033 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
1035 msg_set_bits(m, 9, 0, 0xffff, n);
1038 static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
1040 return msg_bits(m, 9, 16, 0xffff);
1043 static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
1045 msg_set_bits(m, 9, 16, 0xffff, n);
1048 static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
1050 return msg_bits(m, 9, 16, 0xffff);
1053 static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
1055 msg_set_bits(m, 9, 16, 0xffff, n);
1058 static inline u16 msg_grp_remitted(struct tipc_msg *m)
1060 return msg_bits(m, 9, 16, 0xffff);
1063 static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
1065 msg_set_bits(m, 9, 16, 0xffff, n);
1070 static inline u16 msg_grp_evt(struct tipc_msg *m)
1072 return msg_bits(m, 10, 0, 0x3);
1075 static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
1077 msg_set_bits(m, 10, 0, 0x3, n);
1080 static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
1082 return msg_bits(m, 10, 0, 0x1);
1085 static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
1087 msg_set_bits(m, 10, 0, 0x1, n);
1090 static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
1092 return msg_bits(m, 10, 16, 0xffff);
1095 static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
1097 msg_set_bits(m, 10, 16, 0xffff, n);
1100 static inline bool msg_peer_link_is_up(struct tipc_msg *m)
1102 if (likely(msg_user(m) != LINK_PROTOCOL))
1104 if (msg_type(m) == STATE_MSG)
1109 static inline bool msg_peer_node_is_up(struct tipc_msg *m)
1111 if (msg_peer_link_is_up(m))
1113 return msg_redundant_link(m);
1116 static inline bool msg_is_reset(struct tipc_msg *hdr)
1118 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
1123 static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n)
1125 msg_set_word(m, 13, n);
1128 static inline u32 msg_peer_net_hash(struct tipc_msg *m)
1130 return msg_word(m, 13);
1135 static inline u32 msg_sugg_node_addr(struct tipc_msg *m)
1137 return msg_word(m, 14);
1140 static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n)
1142 msg_set_word(m, 14, n);
1145 static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id)
1147 memcpy(msg_data(hdr), id, 16);
1150 static inline u8 *msg_node_id(struct tipc_msg *hdr)
1152 return (u8 *)msg_data(hdr);
1155 struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
1156 bool tipc_msg_validate(struct sk_buff **_skb);
1157 bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
1158 void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
1159 struct sk_buff_head *xmitq);
1160 void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
1161 u32 hsize, u32 destnode);
1162 struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
1163 uint data_sz, u32 dnode, u32 onode,
1164 u32 dport, u32 oport, int errcode);
1165 int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
1166 bool tipc_msg_try_bundle(struct sk_buff *tskb, struct sk_buff **skb, u32 mss,
1167 u32 dnode, bool *new_bundle);
1168 bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
1169 int tipc_msg_fragment(struct sk_buff *skb, const struct tipc_msg *hdr,
1170 int pktmax, struct sk_buff_head *frags);
1171 int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
1172 int offset, int dsz, int mtu, struct sk_buff_head *list);
1173 int tipc_msg_append(struct tipc_msg *hdr, struct msghdr *m, int dlen,
1174 int mss, struct sk_buff_head *txq);
1175 bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
1176 bool tipc_msg_assemble(struct sk_buff_head *list);
1177 bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
1178 bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
1179 struct sk_buff_head *cpy);
1180 bool __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
1181 struct sk_buff *skb);
1182 bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy);
1184 static inline u16 buf_seqno(struct sk_buff *skb)
1186 return msg_seqno(buf_msg(skb));
1189 static inline int buf_roundup_len(struct sk_buff *skb)
1191 return (skb->len / 1024 + 1) * 1024;
1194 /* tipc_skb_peek(): peek and reserve first buffer in list
1195 * @list: list to be peeked in
1196 * Returns pointer to first buffer in list, if any
1198 static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
1201 struct sk_buff *skb;
1204 skb = skb_peek(list);
1207 spin_unlock_bh(lock);
1211 /* tipc_skb_peek_port(): find a destination port, ignoring all destinations
1212 * up to and including 'filter'.
1213 * Note: ignoring previously tried destinations minimizes the risk of
1214 * contention on the socket lock
1215 * @list: list to be peeked in
1216 * @filter: last destination to be ignored from search
1217 * Returns a destination port number, of applicable.
1219 static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
1221 struct sk_buff *skb;
1225 spin_lock_bh(&list->lock);
1226 skb_queue_walk(list, skb) {
1227 dport = msg_destport(buf_msg(skb));
1228 if (!filter || skb_queue_is_last(list, skb))
1230 if (dport == filter)
1235 spin_unlock_bh(&list->lock);
1239 /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1240 * @list: list to be unlinked from
1241 * @dport: selection criteria for buffer to unlink
1243 static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1246 struct sk_buff *_skb, *tmp, *skb = NULL;
1248 spin_lock_bh(&list->lock);
1249 skb_queue_walk_safe(list, _skb, tmp) {
1250 if (msg_destport(buf_msg(_skb)) == dport) {
1251 __skb_unlink(_skb, list);
1256 spin_unlock_bh(&list->lock);
1260 /* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1261 * @list: the new list to append. Not lock protected
1262 * @head: target list. Lock protected.
1264 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1265 struct sk_buff_head *head)
1267 spin_lock_bh(&head->lock);
1268 skb_queue_splice_tail(list, head);
1269 spin_unlock_bh(&head->lock);
1272 /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1273 * @list: the new list to add. Lock protected. Will be reinitialized
1274 * @head: target list. Lock protected.
1276 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1277 struct sk_buff_head *head)
1279 struct sk_buff_head tmp;
1281 __skb_queue_head_init(&tmp);
1283 spin_lock_bh(&list->lock);
1284 skb_queue_splice_tail_init(list, &tmp);
1285 spin_unlock_bh(&list->lock);
1286 tipc_skb_queue_splice_tail(&tmp, head);
1289 /* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno
1290 * @list: list to be dequeued from
1291 * @seqno: seqno of the expected msg
1293 * returns skb dequeued from the list if its seqno is less than or equal to
1294 * the expected one, otherwise the skb is still hold
1296 * Note: must be used with appropriate locks held only
1298 static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list,
1301 struct sk_buff *skb = skb_peek(list);
1303 if (skb && less_eq(buf_seqno(skb), seqno)) {
1304 __skb_unlink(skb, list);