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