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
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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
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 * @ugack_cnt: number of Gap ACK blocks for unicast (following the broadcast
165 * @start_index: starting index for "valid" broadcast Gap ACK blocks
166 * @bgack_cnt: number of Gap ACK blocks for broadcast in the record
167 * @gacks: array of Gap ACK blocks
170 * +-------------+-------------+-------------+-------------+
171 * | bgack_cnt | ugack_cnt | len |
172 * +-------------+-------------+-------------+-------------+ -
174 * +-------------+-------------+-------------+-------------+ > bc gacks
176 * +-------------+-------------+-------------+-------------+ -
178 * +-------------+-------------+-------------+-------------+ > uc gacks
180 * +-------------+-------------+-------------+-------------+ -
182 struct tipc_gap_ack_blks {
189 struct tipc_gap_ack gacks[];
192 #define MAX_GAP_ACK_BLKS 128
193 #define MAX_GAP_ACK_BLKS_SZ (sizeof(struct tipc_gap_ack_blks) + \
194 sizeof(struct tipc_gap_ack) * MAX_GAP_ACK_BLKS)
196 static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
198 return (struct tipc_msg *)skb->data;
201 static inline u32 msg_word(struct tipc_msg *m, u32 pos)
203 return ntohl(m->hdr[pos]);
206 static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
208 m->hdr[w] = htonl(val);
211 static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
213 return (msg_word(m, w) >> pos) & mask;
216 static inline void msg_set_bits(struct tipc_msg *m, u32 w,
217 u32 pos, u32 mask, u32 val)
219 val = (val & mask) << pos;
221 m->hdr[w] &= ~htonl(mask);
222 m->hdr[w] |= htonl(val);
225 static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
227 u32 temp = msg->hdr[a];
229 msg->hdr[a] = msg->hdr[b];
236 static inline u32 msg_version(struct tipc_msg *m)
238 return msg_bits(m, 0, 29, 7);
241 static inline void msg_set_version(struct tipc_msg *m)
243 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
246 static inline u32 msg_user(struct tipc_msg *m)
248 return msg_bits(m, 0, 25, 0xf);
251 static inline u32 msg_isdata(struct tipc_msg *m)
253 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
256 static inline void msg_set_user(struct tipc_msg *m, u32 n)
258 msg_set_bits(m, 0, 25, 0xf, n);
261 static inline u32 msg_hdr_sz(struct tipc_msg *m)
263 return msg_bits(m, 0, 21, 0xf) << 2;
266 static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
268 msg_set_bits(m, 0, 21, 0xf, n>>2);
271 static inline u32 msg_size(struct tipc_msg *m)
273 return msg_bits(m, 0, 0, 0x1ffff);
276 static inline u32 msg_blocks(struct tipc_msg *m)
278 return (msg_size(m) / 1024) + 1;
281 static inline u32 msg_data_sz(struct tipc_msg *m)
283 return msg_size(m) - msg_hdr_sz(m);
286 static inline int msg_non_seq(struct tipc_msg *m)
288 return msg_bits(m, 0, 20, 1);
291 static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
293 msg_set_bits(m, 0, 20, 1, n);
296 static inline int msg_is_syn(struct tipc_msg *m)
298 return msg_bits(m, 0, 17, 1);
301 static inline void msg_set_syn(struct tipc_msg *m, u32 d)
303 msg_set_bits(m, 0, 17, 1, d);
306 static inline int msg_dest_droppable(struct tipc_msg *m)
308 return msg_bits(m, 0, 19, 1);
311 static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
313 msg_set_bits(m, 0, 19, 1, d);
316 static inline int msg_is_keepalive(struct tipc_msg *m)
318 return msg_bits(m, 0, 19, 1);
321 static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
323 msg_set_bits(m, 0, 19, 1, d);
326 static inline int msg_src_droppable(struct tipc_msg *m)
328 return msg_bits(m, 0, 18, 1);
331 static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
333 msg_set_bits(m, 0, 18, 1, d);
336 static inline int msg_ack_required(struct tipc_msg *m)
338 return msg_bits(m, 0, 18, 1);
341 static inline void msg_set_ack_required(struct tipc_msg *m)
343 msg_set_bits(m, 0, 18, 1, 1);
346 static inline int msg_nagle_ack(struct tipc_msg *m)
348 return msg_bits(m, 0, 18, 1);
351 static inline void msg_set_nagle_ack(struct tipc_msg *m)
353 msg_set_bits(m, 0, 18, 1, 1);
356 static inline bool msg_is_rcast(struct tipc_msg *m)
358 return msg_bits(m, 0, 18, 0x1);
361 static inline void msg_set_is_rcast(struct tipc_msg *m, bool d)
363 msg_set_bits(m, 0, 18, 0x1, d);
366 static inline void msg_set_size(struct tipc_msg *m, u32 sz)
368 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
371 static inline unchar *msg_data(struct tipc_msg *m)
373 return ((unchar *)m) + msg_hdr_sz(m);
376 static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m)
378 return (struct tipc_msg *)msg_data(m);
384 static inline u32 msg_type(struct tipc_msg *m)
386 return msg_bits(m, 1, 29, 0x7);
389 static inline void msg_set_type(struct tipc_msg *m, u32 n)
391 msg_set_bits(m, 1, 29, 0x7, n);
394 static inline int msg_in_group(struct tipc_msg *m)
396 int mtyp = msg_type(m);
398 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
401 static inline bool msg_is_grp_evt(struct tipc_msg *m)
403 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
406 static inline u32 msg_named(struct tipc_msg *m)
408 return msg_type(m) == TIPC_NAMED_MSG;
411 static inline u32 msg_mcast(struct tipc_msg *m)
413 int mtyp = msg_type(m);
415 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
416 (mtyp == TIPC_GRP_MCAST_MSG));
419 static inline u32 msg_connected(struct tipc_msg *m)
421 return msg_type(m) == TIPC_CONN_MSG;
424 static inline u32 msg_direct(struct tipc_msg *m)
426 return msg_type(m) == TIPC_DIRECT_MSG;
429 static inline u32 msg_errcode(struct tipc_msg *m)
431 return msg_bits(m, 1, 25, 0xf);
434 static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
436 msg_set_bits(m, 1, 25, 0xf, err);
439 static inline void msg_set_bulk(struct tipc_msg *m)
441 msg_set_bits(m, 1, 28, 0x1, 1);
444 static inline u32 msg_is_bulk(struct tipc_msg *m)
446 return msg_bits(m, 1, 28, 0x1);
449 static inline void msg_set_last_bulk(struct tipc_msg *m)
451 msg_set_bits(m, 1, 27, 0x1, 1);
454 static inline u32 msg_is_last_bulk(struct tipc_msg *m)
456 return msg_bits(m, 1, 27, 0x1);
459 static inline void msg_set_non_legacy(struct tipc_msg *m)
461 msg_set_bits(m, 1, 26, 0x1, 1);
464 static inline u32 msg_is_legacy(struct tipc_msg *m)
466 return !msg_bits(m, 1, 26, 0x1);
469 static inline u32 msg_reroute_cnt(struct tipc_msg *m)
471 return msg_bits(m, 1, 21, 0xf);
474 static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
476 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
479 static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
481 msg_set_bits(m, 1, 21, 0xf, 0);
484 static inline u32 msg_lookup_scope(struct tipc_msg *m)
486 return msg_bits(m, 1, 19, 0x3);
489 static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
491 msg_set_bits(m, 1, 19, 0x3, n);
494 static inline u16 msg_bcast_ack(struct tipc_msg *m)
496 return msg_bits(m, 1, 0, 0xffff);
499 static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
501 msg_set_bits(m, 1, 0, 0xffff, n);
504 /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
505 * link peer session number
507 static inline bool msg_dest_session_valid(struct tipc_msg *m)
509 return msg_bits(m, 1, 16, 0x1);
512 static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid)
514 msg_set_bits(m, 1, 16, 0x1, valid);
517 static inline u16 msg_dest_session(struct tipc_msg *m)
519 return msg_bits(m, 1, 0, 0xffff);
522 static inline void msg_set_dest_session(struct tipc_msg *m, u16 n)
524 msg_set_bits(m, 1, 0, 0xffff, n);
530 static inline u16 msg_ack(struct tipc_msg *m)
532 return msg_bits(m, 2, 16, 0xffff);
535 static inline void msg_set_ack(struct tipc_msg *m, u16 n)
537 msg_set_bits(m, 2, 16, 0xffff, n);
540 static inline u16 msg_seqno(struct tipc_msg *m)
542 return msg_bits(m, 2, 0, 0xffff);
545 static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
547 msg_set_bits(m, 2, 0, 0xffff, n);
553 static inline u32 msg_importance(struct tipc_msg *m)
555 int usr = msg_user(m);
557 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
559 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
560 return msg_bits(m, 9, 0, 0x7);
561 return TIPC_SYSTEM_IMPORTANCE;
564 static inline void msg_set_importance(struct tipc_msg *m, u32 i)
566 int usr = msg_user(m);
568 if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)))
569 msg_set_bits(m, 9, 0, 0x7, i);
570 else if (i < TIPC_SYSTEM_IMPORTANCE)
573 pr_warn("Trying to set illegal importance in message\n");
576 static inline u32 msg_prevnode(struct tipc_msg *m)
578 return msg_word(m, 3);
581 static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
583 msg_set_word(m, 3, a);
586 static inline u32 msg_origport(struct tipc_msg *m)
588 if (msg_user(m) == MSG_FRAGMENTER)
589 m = msg_inner_hdr(m);
590 return msg_word(m, 4);
593 static inline void msg_set_origport(struct tipc_msg *m, u32 p)
595 msg_set_word(m, 4, p);
598 static inline u16 msg_named_seqno(struct tipc_msg *m)
600 return msg_bits(m, 4, 0, 0xffff);
603 static inline void msg_set_named_seqno(struct tipc_msg *m, u16 n)
605 msg_set_bits(m, 4, 0, 0xffff, n);
608 static inline u32 msg_destport(struct tipc_msg *m)
610 return msg_word(m, 5);
613 static inline void msg_set_destport(struct tipc_msg *m, u32 p)
615 msg_set_word(m, 5, p);
618 static inline u32 msg_mc_netid(struct tipc_msg *m)
620 return msg_word(m, 5);
623 static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
625 msg_set_word(m, 5, p);
628 static inline int msg_short(struct tipc_msg *m)
630 return msg_hdr_sz(m) == SHORT_H_SIZE;
633 static inline u32 msg_orignode(struct tipc_msg *m)
635 if (likely(msg_short(m)))
636 return msg_prevnode(m);
637 return msg_word(m, 6);
640 static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
642 msg_set_word(m, 6, a);
645 static inline u32 msg_destnode(struct tipc_msg *m)
647 return msg_word(m, 7);
650 static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
652 msg_set_word(m, 7, a);
655 static inline u32 msg_nametype(struct tipc_msg *m)
657 return msg_word(m, 8);
660 static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
662 msg_set_word(m, 8, n);
665 static inline u32 msg_nameinst(struct tipc_msg *m)
667 return msg_word(m, 9);
670 static inline u32 msg_namelower(struct tipc_msg *m)
672 return msg_nameinst(m);
675 static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
677 msg_set_word(m, 9, n);
680 static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
682 msg_set_namelower(m, n);
685 static inline u32 msg_nameupper(struct tipc_msg *m)
687 return msg_word(m, 10);
690 static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
692 msg_set_word(m, 10, n);
696 * Constants and routines used to read and write TIPC internal message headers
700 * Connection management protocol message types
703 #define CONN_PROBE_REPLY 1
707 * Name distributor message types
709 #define PUBLICATION 0
713 * Segmentation message types
715 #define FIRST_FRAGMENT 0
717 #define LAST_FRAGMENT 2
720 * Link management protocol message types
724 #define ACTIVATE_MSG 2
727 * Changeover tunnel message types
730 #define FAILOVER_MSG 1
733 * Config protocol message types
735 #define DSC_REQ_MSG 0
736 #define DSC_RESP_MSG 1
737 #define DSC_TRIAL_MSG 2
738 #define DSC_TRIAL_FAIL_MSG 3
741 * Group protocol message types
743 #define GRP_JOIN_MSG 0
744 #define GRP_LEAVE_MSG 1
745 #define GRP_ADV_MSG 2
746 #define GRP_ACK_MSG 3
747 #define GRP_RECLAIM_MSG 4
748 #define GRP_REMIT_MSG 5
753 static inline u32 msg_seq_gap(struct tipc_msg *m)
755 return msg_bits(m, 1, 16, 0x1fff);
758 static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
760 msg_set_bits(m, 1, 16, 0x1fff, n);
763 static inline u32 msg_node_sig(struct tipc_msg *m)
765 return msg_bits(m, 1, 0, 0xffff);
768 static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
770 msg_set_bits(m, 1, 0, 0xffff, n);
773 static inline u32 msg_node_capabilities(struct tipc_msg *m)
775 return msg_bits(m, 1, 15, 0x1fff);
778 static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
780 msg_set_bits(m, 1, 15, 0x1fff, n);
786 static inline u32 msg_dest_domain(struct tipc_msg *m)
788 return msg_word(m, 2);
791 static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
793 msg_set_word(m, 2, n);
796 static inline u32 msg_bcgap_after(struct tipc_msg *m)
798 return msg_bits(m, 2, 16, 0xffff);
801 static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
803 msg_set_bits(m, 2, 16, 0xffff, n);
806 static inline u32 msg_bcgap_to(struct tipc_msg *m)
808 return msg_bits(m, 2, 0, 0xffff);
811 static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
813 msg_set_bits(m, 2, 0, 0xffff, n);
819 static inline u32 msg_last_bcast(struct tipc_msg *m)
821 return msg_bits(m, 4, 16, 0xffff);
824 static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
826 return msg_last_bcast(m) + 1;
829 static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
831 msg_set_bits(m, 4, 16, 0xffff, n);
834 static inline u32 msg_nof_fragms(struct tipc_msg *m)
836 return msg_bits(m, 4, 0, 0xffff);
839 static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n)
841 msg_set_bits(m, 4, 0, 0xffff, n);
844 static inline u32 msg_fragm_no(struct tipc_msg *m)
846 return msg_bits(m, 4, 16, 0xffff);
849 static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
851 msg_set_bits(m, 4, 16, 0xffff, n);
854 static inline u16 msg_next_sent(struct tipc_msg *m)
856 return msg_bits(m, 4, 0, 0xffff);
859 static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
861 msg_set_bits(m, 4, 0, 0xffff, n);
864 static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
866 msg_set_bits(m, 4, 0, 0xffff, n);
869 static inline u32 msg_bc_netid(struct tipc_msg *m)
871 return msg_word(m, 4);
874 static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
876 msg_set_word(m, 4, id);
879 static inline u32 msg_link_selector(struct tipc_msg *m)
881 if (msg_user(m) == MSG_FRAGMENTER)
882 m = (void *)msg_data(m);
883 return msg_bits(m, 4, 0, 1);
889 static inline u16 msg_session(struct tipc_msg *m)
891 return msg_bits(m, 5, 16, 0xffff);
894 static inline void msg_set_session(struct tipc_msg *m, u16 n)
896 msg_set_bits(m, 5, 16, 0xffff, n);
899 static inline u32 msg_probe(struct tipc_msg *m)
901 return msg_bits(m, 5, 0, 1);
904 static inline void msg_set_probe(struct tipc_msg *m, u32 val)
906 msg_set_bits(m, 5, 0, 1, val);
909 static inline char msg_net_plane(struct tipc_msg *m)
911 return msg_bits(m, 5, 1, 7) + 'A';
914 static inline void msg_set_net_plane(struct tipc_msg *m, char n)
916 msg_set_bits(m, 5, 1, 7, (n - 'A'));
919 static inline u32 msg_linkprio(struct tipc_msg *m)
921 return msg_bits(m, 5, 4, 0x1f);
924 static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
926 msg_set_bits(m, 5, 4, 0x1f, n);
929 static inline u32 msg_bearer_id(struct tipc_msg *m)
931 return msg_bits(m, 5, 9, 0x7);
934 static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
936 msg_set_bits(m, 5, 9, 0x7, n);
939 static inline u32 msg_redundant_link(struct tipc_msg *m)
941 return msg_bits(m, 5, 12, 0x1);
944 static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
946 msg_set_bits(m, 5, 12, 0x1, r);
949 static inline u32 msg_peer_stopping(struct tipc_msg *m)
951 return msg_bits(m, 5, 13, 0x1);
954 static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
956 msg_set_bits(m, 5, 13, 0x1, s);
959 static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
961 switch (msg_user(m)) {
963 case NAME_DISTRIBUTOR:
965 return msg_bits(m, 5, 14, 0x1);
971 static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
973 msg_set_bits(m, 5, 14, 0x1, invalid);
976 static inline char *msg_media_addr(struct tipc_msg *m)
978 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
981 static inline u32 msg_bc_gap(struct tipc_msg *m)
983 return msg_bits(m, 8, 0, 0x3ff);
986 static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
988 msg_set_bits(m, 8, 0, 0x3ff, n);
994 static inline u16 msg_msgcnt(struct tipc_msg *m)
996 return msg_bits(m, 9, 16, 0xffff);
999 static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
1001 msg_set_bits(m, 9, 16, 0xffff, n);
1004 static inline u16 msg_syncpt(struct tipc_msg *m)
1006 return msg_bits(m, 9, 16, 0xffff);
1009 static inline void msg_set_syncpt(struct tipc_msg *m, u16 n)
1011 msg_set_bits(m, 9, 16, 0xffff, n);
1014 static inline u32 msg_conn_ack(struct tipc_msg *m)
1016 return msg_bits(m, 9, 16, 0xffff);
1019 static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
1021 msg_set_bits(m, 9, 16, 0xffff, n);
1024 static inline u16 msg_adv_win(struct tipc_msg *m)
1026 return msg_bits(m, 9, 0, 0xffff);
1029 static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
1031 msg_set_bits(m, 9, 0, 0xffff, n);
1034 static inline u32 msg_max_pkt(struct tipc_msg *m)
1036 return msg_bits(m, 9, 16, 0xffff) * 4;
1039 static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
1041 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
1044 static inline u32 msg_link_tolerance(struct tipc_msg *m)
1046 return msg_bits(m, 9, 0, 0xffff);
1049 static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
1051 msg_set_bits(m, 9, 0, 0xffff, n);
1054 static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
1056 return msg_bits(m, 9, 16, 0xffff);
1059 static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
1061 msg_set_bits(m, 9, 16, 0xffff, n);
1064 static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
1066 return msg_bits(m, 9, 16, 0xffff);
1069 static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
1071 msg_set_bits(m, 9, 16, 0xffff, n);
1074 static inline u16 msg_grp_remitted(struct tipc_msg *m)
1076 return msg_bits(m, 9, 16, 0xffff);
1079 static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
1081 msg_set_bits(m, 9, 16, 0xffff, n);
1086 static inline u16 msg_grp_evt(struct tipc_msg *m)
1088 return msg_bits(m, 10, 0, 0x3);
1091 static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
1093 msg_set_bits(m, 10, 0, 0x3, n);
1096 static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
1098 return msg_bits(m, 10, 0, 0x1);
1101 static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
1103 msg_set_bits(m, 10, 0, 0x1, n);
1106 static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
1108 return msg_bits(m, 10, 16, 0xffff);
1111 static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
1113 msg_set_bits(m, 10, 16, 0xffff, n);
1116 static inline bool msg_peer_link_is_up(struct tipc_msg *m)
1118 if (likely(msg_user(m) != LINK_PROTOCOL))
1120 if (msg_type(m) == STATE_MSG)
1125 static inline bool msg_peer_node_is_up(struct tipc_msg *m)
1127 if (msg_peer_link_is_up(m))
1129 return msg_redundant_link(m);
1132 static inline bool msg_is_reset(struct tipc_msg *hdr)
1134 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
1139 static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n)
1141 msg_set_word(m, 13, n);
1144 static inline u32 msg_peer_net_hash(struct tipc_msg *m)
1146 return msg_word(m, 13);
1151 static inline u32 msg_sugg_node_addr(struct tipc_msg *m)
1153 return msg_word(m, 14);
1156 static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n)
1158 msg_set_word(m, 14, n);
1161 static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id)
1163 memcpy(msg_data(hdr), id, 16);
1166 static inline u8 *msg_node_id(struct tipc_msg *hdr)
1168 return (u8 *)msg_data(hdr);
1171 struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
1172 bool tipc_msg_validate(struct sk_buff **_skb);
1173 bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
1174 void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
1175 struct sk_buff_head *xmitq);
1176 void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
1177 u32 hsize, u32 destnode);
1178 struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
1179 uint data_sz, u32 dnode, u32 onode,
1180 u32 dport, u32 oport, int errcode);
1181 int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
1182 bool tipc_msg_try_bundle(struct sk_buff *tskb, struct sk_buff **skb, u32 mss,
1183 u32 dnode, bool *new_bundle);
1184 bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
1185 int tipc_msg_fragment(struct sk_buff *skb, const struct tipc_msg *hdr,
1186 int pktmax, struct sk_buff_head *frags);
1187 int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
1188 int offset, int dsz, int mtu, struct sk_buff_head *list);
1189 int tipc_msg_append(struct tipc_msg *hdr, struct msghdr *m, int dlen,
1190 int mss, struct sk_buff_head *txq);
1191 bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
1192 bool tipc_msg_assemble(struct sk_buff_head *list);
1193 bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
1194 bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
1195 struct sk_buff_head *cpy);
1196 bool __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
1197 struct sk_buff *skb);
1198 bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy);
1200 static inline u16 buf_seqno(struct sk_buff *skb)
1202 return msg_seqno(buf_msg(skb));
1205 static inline int buf_roundup_len(struct sk_buff *skb)
1207 return (skb->len / 1024 + 1) * 1024;
1210 /* tipc_skb_peek(): peek and reserve first buffer in list
1211 * @list: list to be peeked in
1212 * Returns pointer to first buffer in list, if any
1214 static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
1217 struct sk_buff *skb;
1220 skb = skb_peek(list);
1223 spin_unlock_bh(lock);
1227 /* tipc_skb_peek_port(): find a destination port, ignoring all destinations
1228 * up to and including 'filter'.
1229 * Note: ignoring previously tried destinations minimizes the risk of
1230 * contention on the socket lock
1231 * @list: list to be peeked in
1232 * @filter: last destination to be ignored from search
1233 * Returns a destination port number, of applicable.
1235 static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
1237 struct sk_buff *skb;
1241 spin_lock_bh(&list->lock);
1242 skb_queue_walk(list, skb) {
1243 dport = msg_destport(buf_msg(skb));
1244 if (!filter || skb_queue_is_last(list, skb))
1246 if (dport == filter)
1251 spin_unlock_bh(&list->lock);
1255 /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1256 * @list: list to be unlinked from
1257 * @dport: selection criteria for buffer to unlink
1259 static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1262 struct sk_buff *_skb, *tmp, *skb = NULL;
1264 spin_lock_bh(&list->lock);
1265 skb_queue_walk_safe(list, _skb, tmp) {
1266 if (msg_destport(buf_msg(_skb)) == dport) {
1267 __skb_unlink(_skb, list);
1272 spin_unlock_bh(&list->lock);
1276 /* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1277 * @list: the new list to append. Not lock protected
1278 * @head: target list. Lock protected.
1280 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1281 struct sk_buff_head *head)
1283 spin_lock_bh(&head->lock);
1284 skb_queue_splice_tail(list, head);
1285 spin_unlock_bh(&head->lock);
1288 /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1289 * @list: the new list to add. Lock protected. Will be reinitialized
1290 * @head: target list. Lock protected.
1292 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1293 struct sk_buff_head *head)
1295 struct sk_buff_head tmp;
1297 __skb_queue_head_init(&tmp);
1299 spin_lock_bh(&list->lock);
1300 skb_queue_splice_tail_init(list, &tmp);
1301 spin_unlock_bh(&list->lock);
1302 tipc_skb_queue_splice_tail(&tmp, head);
1305 /* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno
1306 * @list: list to be dequeued from
1307 * @seqno: seqno of the expected msg
1309 * returns skb dequeued from the list if its seqno is less than or equal to
1310 * the expected one, otherwise the skb is still hold
1312 * Note: must be used with appropriate locks held only
1314 static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list,
1317 struct sk_buff *skb = skb_peek(list);
1319 if (skb && less_eq(buf_seqno(skb), seqno)) {
1320 __skb_unlink(skb, list);