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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
;
113 #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
119 static inline struct tipc_msg
*buf_msg(struct sk_buff
*skb
)
121 return (struct tipc_msg
*)skb
->data
;
124 static inline u32
msg_word(struct tipc_msg
*m
, u32 pos
)
126 return ntohl(m
->hdr
[pos
]);
129 static inline void msg_set_word(struct tipc_msg
*m
, u32 w
, u32 val
)
131 m
->hdr
[w
] = htonl(val
);
134 static inline u32
msg_bits(struct tipc_msg
*m
, u32 w
, u32 pos
, u32 mask
)
136 return (msg_word(m
, w
) >> pos
) & mask
;
139 static inline void msg_set_bits(struct tipc_msg
*m
, u32 w
,
140 u32 pos
, u32 mask
, u32 val
)
142 val
= (val
& mask
) << pos
;
144 m
->hdr
[w
] &= ~htonl(mask
);
145 m
->hdr
[w
] |= htonl(val
);
148 static inline void msg_swap_words(struct tipc_msg
*msg
, u32 a
, u32 b
)
150 u32 temp
= msg
->hdr
[a
];
152 msg
->hdr
[a
] = msg
->hdr
[b
];
159 static inline u32
msg_version(struct tipc_msg
*m
)
161 return msg_bits(m
, 0, 29, 7);
164 static inline void msg_set_version(struct tipc_msg
*m
)
166 msg_set_bits(m
, 0, 29, 7, TIPC_VERSION
);
169 static inline u32
msg_user(struct tipc_msg
*m
)
171 return msg_bits(m
, 0, 25, 0xf);
174 static inline u32
msg_isdata(struct tipc_msg
*m
)
176 return msg_user(m
) <= TIPC_CRITICAL_IMPORTANCE
;
179 static inline void msg_set_user(struct tipc_msg
*m
, u32 n
)
181 msg_set_bits(m
, 0, 25, 0xf, n
);
184 static inline u32
msg_hdr_sz(struct tipc_msg
*m
)
186 return msg_bits(m
, 0, 21, 0xf) << 2;
189 static inline void msg_set_hdr_sz(struct tipc_msg
*m
, u32 n
)
191 msg_set_bits(m
, 0, 21, 0xf, n
>>2);
194 static inline u32
msg_size(struct tipc_msg
*m
)
196 return msg_bits(m
, 0, 0, 0x1ffff);
199 static inline u32
msg_blocks(struct tipc_msg
*m
)
201 return (msg_size(m
) / 1024) + 1;
204 static inline u32
msg_data_sz(struct tipc_msg
*m
)
206 return msg_size(m
) - msg_hdr_sz(m
);
209 static inline int msg_non_seq(struct tipc_msg
*m
)
211 return msg_bits(m
, 0, 20, 1);
214 static inline void msg_set_non_seq(struct tipc_msg
*m
, u32 n
)
216 msg_set_bits(m
, 0, 20, 1, n
);
219 static inline int msg_dest_droppable(struct tipc_msg
*m
)
221 return msg_bits(m
, 0, 19, 1);
224 static inline void msg_set_dest_droppable(struct tipc_msg
*m
, u32 d
)
226 msg_set_bits(m
, 0, 19, 1, d
);
229 static inline int msg_src_droppable(struct tipc_msg
*m
)
231 return msg_bits(m
, 0, 18, 1);
234 static inline void msg_set_src_droppable(struct tipc_msg
*m
, u32 d
)
236 msg_set_bits(m
, 0, 18, 1, d
);
239 static inline void msg_set_size(struct tipc_msg
*m
, u32 sz
)
241 m
->hdr
[0] = htonl((msg_word(m
, 0) & ~0x1ffff) | sz
);
244 static inline unchar
*msg_data(struct tipc_msg
*m
)
246 return ((unchar
*)m
) + msg_hdr_sz(m
);
249 static inline struct tipc_msg
*msg_get_wrapped(struct tipc_msg
*m
)
251 return (struct tipc_msg
*)msg_data(m
);
257 static inline u32
msg_type(struct tipc_msg
*m
)
259 return msg_bits(m
, 1, 29, 0x7);
262 static inline void msg_set_type(struct tipc_msg
*m
, u32 n
)
264 msg_set_bits(m
, 1, 29, 0x7, n
);
267 static inline int msg_in_group(struct tipc_msg
*m
)
269 int mtyp
= msg_type(m
);
271 return mtyp
>= TIPC_GRP_MEMBER_EVT
&& mtyp
<= TIPC_GRP_UCAST_MSG
;
274 static inline bool msg_is_grp_evt(struct tipc_msg
*m
)
276 return msg_type(m
) == TIPC_GRP_MEMBER_EVT
;
279 static inline u32
msg_named(struct tipc_msg
*m
)
281 return msg_type(m
) == TIPC_NAMED_MSG
;
284 static inline u32
msg_mcast(struct tipc_msg
*m
)
286 int mtyp
= msg_type(m
);
288 return ((mtyp
== TIPC_MCAST_MSG
) || (mtyp
== TIPC_GRP_BCAST_MSG
) ||
289 (mtyp
== TIPC_GRP_MCAST_MSG
));
292 static inline u32
msg_connected(struct tipc_msg
*m
)
294 return msg_type(m
) == TIPC_CONN_MSG
;
297 static inline u32
msg_errcode(struct tipc_msg
*m
)
299 return msg_bits(m
, 1, 25, 0xf);
302 static inline void msg_set_errcode(struct tipc_msg
*m
, u32 err
)
304 msg_set_bits(m
, 1, 25, 0xf, err
);
307 static inline u32
msg_reroute_cnt(struct tipc_msg
*m
)
309 return msg_bits(m
, 1, 21, 0xf);
312 static inline void msg_incr_reroute_cnt(struct tipc_msg
*m
)
314 msg_set_bits(m
, 1, 21, 0xf, msg_reroute_cnt(m
) + 1);
317 static inline void msg_reset_reroute_cnt(struct tipc_msg
*m
)
319 msg_set_bits(m
, 1, 21, 0xf, 0);
322 static inline u32
msg_lookup_scope(struct tipc_msg
*m
)
324 return msg_bits(m
, 1, 19, 0x3);
327 static inline void msg_set_lookup_scope(struct tipc_msg
*m
, u32 n
)
329 msg_set_bits(m
, 1, 19, 0x3, n
);
332 static inline u16
msg_bcast_ack(struct tipc_msg
*m
)
334 return msg_bits(m
, 1, 0, 0xffff);
337 static inline void msg_set_bcast_ack(struct tipc_msg
*m
, u16 n
)
339 msg_set_bits(m
, 1, 0, 0xffff, n
);
346 static inline u16
msg_ack(struct tipc_msg
*m
)
348 return msg_bits(m
, 2, 16, 0xffff);
351 static inline void msg_set_ack(struct tipc_msg
*m
, u16 n
)
353 msg_set_bits(m
, 2, 16, 0xffff, n
);
356 static inline u16
msg_seqno(struct tipc_msg
*m
)
358 return msg_bits(m
, 2, 0, 0xffff);
361 static inline void msg_set_seqno(struct tipc_msg
*m
, u16 n
)
363 msg_set_bits(m
, 2, 0, 0xffff, n
);
369 static inline u32
msg_importance(struct tipc_msg
*m
)
371 int usr
= msg_user(m
);
373 if (likely((usr
<= TIPC_CRITICAL_IMPORTANCE
) && !msg_errcode(m
)))
375 if ((usr
== MSG_FRAGMENTER
) || (usr
== MSG_BUNDLER
))
376 return msg_bits(m
, 9, 0, 0x7);
377 return TIPC_SYSTEM_IMPORTANCE
;
380 static inline void msg_set_importance(struct tipc_msg
*m
, u32 i
)
382 int usr
= msg_user(m
);
384 if (likely((usr
== MSG_FRAGMENTER
) || (usr
== MSG_BUNDLER
)))
385 msg_set_bits(m
, 9, 0, 0x7, i
);
386 else if (i
< TIPC_SYSTEM_IMPORTANCE
)
389 pr_warn("Trying to set illegal importance in message\n");
392 static inline u32
msg_prevnode(struct tipc_msg
*m
)
394 return msg_word(m
, 3);
397 static inline void msg_set_prevnode(struct tipc_msg
*m
, u32 a
)
399 msg_set_word(m
, 3, a
);
402 static inline u32
msg_origport(struct tipc_msg
*m
)
404 if (msg_user(m
) == MSG_FRAGMENTER
)
405 m
= msg_get_wrapped(m
);
406 return msg_word(m
, 4);
409 static inline void msg_set_origport(struct tipc_msg
*m
, u32 p
)
411 msg_set_word(m
, 4, p
);
414 static inline u32
msg_destport(struct tipc_msg
*m
)
416 return msg_word(m
, 5);
419 static inline void msg_set_destport(struct tipc_msg
*m
, u32 p
)
421 msg_set_word(m
, 5, p
);
424 static inline u32
msg_mc_netid(struct tipc_msg
*m
)
426 return msg_word(m
, 5);
429 static inline void msg_set_mc_netid(struct tipc_msg
*m
, u32 p
)
431 msg_set_word(m
, 5, p
);
434 static inline int msg_short(struct tipc_msg
*m
)
436 return msg_hdr_sz(m
) == SHORT_H_SIZE
;
439 static inline u32
msg_orignode(struct tipc_msg
*m
)
441 if (likely(msg_short(m
)))
442 return msg_prevnode(m
);
443 return msg_word(m
, 6);
446 static inline void msg_set_orignode(struct tipc_msg
*m
, u32 a
)
448 msg_set_word(m
, 6, a
);
451 static inline u32
msg_destnode(struct tipc_msg
*m
)
453 return msg_word(m
, 7);
456 static inline void msg_set_destnode(struct tipc_msg
*m
, u32 a
)
458 msg_set_word(m
, 7, a
);
461 static inline u32
msg_nametype(struct tipc_msg
*m
)
463 return msg_word(m
, 8);
466 static inline void msg_set_nametype(struct tipc_msg
*m
, u32 n
)
468 msg_set_word(m
, 8, n
);
471 static inline u32
msg_nameinst(struct tipc_msg
*m
)
473 return msg_word(m
, 9);
476 static inline u32
msg_namelower(struct tipc_msg
*m
)
478 return msg_nameinst(m
);
481 static inline void msg_set_namelower(struct tipc_msg
*m
, u32 n
)
483 msg_set_word(m
, 9, n
);
486 static inline void msg_set_nameinst(struct tipc_msg
*m
, u32 n
)
488 msg_set_namelower(m
, n
);
491 static inline u32
msg_nameupper(struct tipc_msg
*m
)
493 return msg_word(m
, 10);
496 static inline void msg_set_nameupper(struct tipc_msg
*m
, u32 n
)
498 msg_set_word(m
, 10, n
);
502 * Constants and routines used to read and write TIPC internal message headers
506 * Connection management protocol message types
509 #define CONN_PROBE_REPLY 1
513 * Name distributor message types
515 #define PUBLICATION 0
519 * Segmentation message types
521 #define FIRST_FRAGMENT 0
523 #define LAST_FRAGMENT 2
526 * Link management protocol message types
530 #define ACTIVATE_MSG 2
533 * Changeover tunnel message types
536 #define FAILOVER_MSG 1
539 * Config protocol message types
541 #define DSC_REQ_MSG 0
542 #define DSC_RESP_MSG 1
545 * Group protocol message types
547 #define GRP_JOIN_MSG 0
548 #define GRP_LEAVE_MSG 1
549 #define GRP_ADV_MSG 2
550 #define GRP_ACK_MSG 3
551 #define GRP_RECLAIM_MSG 4
552 #define GRP_REMIT_MSG 5
557 static inline u32
msg_seq_gap(struct tipc_msg
*m
)
559 return msg_bits(m
, 1, 16, 0x1fff);
562 static inline void msg_set_seq_gap(struct tipc_msg
*m
, u32 n
)
564 msg_set_bits(m
, 1, 16, 0x1fff, n
);
567 static inline u32
msg_node_sig(struct tipc_msg
*m
)
569 return msg_bits(m
, 1, 0, 0xffff);
572 static inline void msg_set_node_sig(struct tipc_msg
*m
, u32 n
)
574 msg_set_bits(m
, 1, 0, 0xffff, n
);
577 static inline u32
msg_node_capabilities(struct tipc_msg
*m
)
579 return msg_bits(m
, 1, 15, 0x1fff);
582 static inline void msg_set_node_capabilities(struct tipc_msg
*m
, u32 n
)
584 msg_set_bits(m
, 1, 15, 0x1fff, n
);
590 static inline u32
msg_dest_domain(struct tipc_msg
*m
)
592 return msg_word(m
, 2);
595 static inline void msg_set_dest_domain(struct tipc_msg
*m
, u32 n
)
597 msg_set_word(m
, 2, n
);
600 static inline u32
msg_bcgap_after(struct tipc_msg
*m
)
602 return msg_bits(m
, 2, 16, 0xffff);
605 static inline void msg_set_bcgap_after(struct tipc_msg
*m
, u32 n
)
607 msg_set_bits(m
, 2, 16, 0xffff, n
);
610 static inline u32
msg_bcgap_to(struct tipc_msg
*m
)
612 return msg_bits(m
, 2, 0, 0xffff);
615 static inline void msg_set_bcgap_to(struct tipc_msg
*m
, u32 n
)
617 msg_set_bits(m
, 2, 0, 0xffff, n
);
624 static inline u32
msg_last_bcast(struct tipc_msg
*m
)
626 return msg_bits(m
, 4, 16, 0xffff);
629 static inline u32
msg_bc_snd_nxt(struct tipc_msg
*m
)
631 return msg_last_bcast(m
) + 1;
634 static inline void msg_set_last_bcast(struct tipc_msg
*m
, u32 n
)
636 msg_set_bits(m
, 4, 16, 0xffff, n
);
639 static inline void msg_set_fragm_no(struct tipc_msg
*m
, u32 n
)
641 msg_set_bits(m
, 4, 16, 0xffff, n
);
645 static inline u16
msg_next_sent(struct tipc_msg
*m
)
647 return msg_bits(m
, 4, 0, 0xffff);
650 static inline void msg_set_next_sent(struct tipc_msg
*m
, u16 n
)
652 msg_set_bits(m
, 4, 0, 0xffff, n
);
655 static inline void msg_set_long_msgno(struct tipc_msg
*m
, u32 n
)
657 msg_set_bits(m
, 4, 0, 0xffff, n
);
660 static inline u32
msg_bc_netid(struct tipc_msg
*m
)
662 return msg_word(m
, 4);
665 static inline void msg_set_bc_netid(struct tipc_msg
*m
, u32 id
)
667 msg_set_word(m
, 4, id
);
670 static inline u32
msg_link_selector(struct tipc_msg
*m
)
672 if (msg_user(m
) == MSG_FRAGMENTER
)
673 m
= (void *)msg_data(m
);
674 return msg_bits(m
, 4, 0, 1);
680 static inline u16
msg_session(struct tipc_msg
*m
)
682 return msg_bits(m
, 5, 16, 0xffff);
685 static inline void msg_set_session(struct tipc_msg
*m
, u16 n
)
687 msg_set_bits(m
, 5, 16, 0xffff, n
);
690 static inline u32
msg_probe(struct tipc_msg
*m
)
692 return msg_bits(m
, 5, 0, 1);
695 static inline void msg_set_probe(struct tipc_msg
*m
, u32 val
)
697 msg_set_bits(m
, 5, 0, 1, val
);
700 static inline char msg_net_plane(struct tipc_msg
*m
)
702 return msg_bits(m
, 5, 1, 7) + 'A';
705 static inline void msg_set_net_plane(struct tipc_msg
*m
, char n
)
707 msg_set_bits(m
, 5, 1, 7, (n
- 'A'));
710 static inline u32
msg_linkprio(struct tipc_msg
*m
)
712 return msg_bits(m
, 5, 4, 0x1f);
715 static inline void msg_set_linkprio(struct tipc_msg
*m
, u32 n
)
717 msg_set_bits(m
, 5, 4, 0x1f, n
);
720 static inline u32
msg_bearer_id(struct tipc_msg
*m
)
722 return msg_bits(m
, 5, 9, 0x7);
725 static inline void msg_set_bearer_id(struct tipc_msg
*m
, u32 n
)
727 msg_set_bits(m
, 5, 9, 0x7, n
);
730 static inline u32
msg_redundant_link(struct tipc_msg
*m
)
732 return msg_bits(m
, 5, 12, 0x1);
735 static inline void msg_set_redundant_link(struct tipc_msg
*m
, u32 r
)
737 msg_set_bits(m
, 5, 12, 0x1, r
);
740 static inline u32
msg_peer_stopping(struct tipc_msg
*m
)
742 return msg_bits(m
, 5, 13, 0x1);
745 static inline void msg_set_peer_stopping(struct tipc_msg
*m
, u32 s
)
747 msg_set_bits(m
, 5, 13, 0x1, s
);
750 static inline bool msg_bc_ack_invalid(struct tipc_msg
*m
)
752 switch (msg_user(m
)) {
754 case NAME_DISTRIBUTOR
:
756 return msg_bits(m
, 5, 14, 0x1);
762 static inline void msg_set_bc_ack_invalid(struct tipc_msg
*m
, bool invalid
)
764 msg_set_bits(m
, 5, 14, 0x1, invalid
);
767 static inline char *msg_media_addr(struct tipc_msg
*m
)
769 return (char *)&m
->hdr
[TIPC_MEDIA_INFO_OFFSET
];
772 static inline u32
msg_bc_gap(struct tipc_msg
*m
)
774 return msg_bits(m
, 8, 0, 0x3ff);
777 static inline void msg_set_bc_gap(struct tipc_msg
*m
, u32 n
)
779 msg_set_bits(m
, 8, 0, 0x3ff, n
);
785 static inline u16
msg_msgcnt(struct tipc_msg
*m
)
787 return msg_bits(m
, 9, 16, 0xffff);
790 static inline void msg_set_msgcnt(struct tipc_msg
*m
, u16 n
)
792 msg_set_bits(m
, 9, 16, 0xffff, n
);
795 static inline u32
msg_conn_ack(struct tipc_msg
*m
)
797 return msg_bits(m
, 9, 16, 0xffff);
800 static inline void msg_set_conn_ack(struct tipc_msg
*m
, u32 n
)
802 msg_set_bits(m
, 9, 16, 0xffff, n
);
805 static inline u16
msg_adv_win(struct tipc_msg
*m
)
807 return msg_bits(m
, 9, 0, 0xffff);
810 static inline void msg_set_adv_win(struct tipc_msg
*m
, u16 n
)
812 msg_set_bits(m
, 9, 0, 0xffff, n
);
815 static inline u32
msg_max_pkt(struct tipc_msg
*m
)
817 return msg_bits(m
, 9, 16, 0xffff) * 4;
820 static inline void msg_set_max_pkt(struct tipc_msg
*m
, u32 n
)
822 msg_set_bits(m
, 9, 16, 0xffff, (n
/ 4));
825 static inline u32
msg_link_tolerance(struct tipc_msg
*m
)
827 return msg_bits(m
, 9, 0, 0xffff);
830 static inline void msg_set_link_tolerance(struct tipc_msg
*m
, u32 n
)
832 msg_set_bits(m
, 9, 0, 0xffff, n
);
835 static inline u16
msg_grp_bc_syncpt(struct tipc_msg
*m
)
837 return msg_bits(m
, 9, 16, 0xffff);
840 static inline void msg_set_grp_bc_syncpt(struct tipc_msg
*m
, u16 n
)
842 msg_set_bits(m
, 9, 16, 0xffff, n
);
845 static inline u16
msg_grp_bc_acked(struct tipc_msg
*m
)
847 return msg_bits(m
, 9, 16, 0xffff);
850 static inline void msg_set_grp_bc_acked(struct tipc_msg
*m
, u16 n
)
852 msg_set_bits(m
, 9, 16, 0xffff, n
);
855 static inline u16
msg_grp_remitted(struct tipc_msg
*m
)
857 return msg_bits(m
, 9, 16, 0xffff);
860 static inline void msg_set_grp_remitted(struct tipc_msg
*m
, u16 n
)
862 msg_set_bits(m
, 9, 16, 0xffff, n
);
867 static inline u16
msg_grp_evt(struct tipc_msg
*m
)
869 return msg_bits(m
, 10, 0, 0x3);
872 static inline void msg_set_grp_evt(struct tipc_msg
*m
, int n
)
874 msg_set_bits(m
, 10, 0, 0x3, n
);
877 static inline u16
msg_grp_bc_ack_req(struct tipc_msg
*m
)
879 return msg_bits(m
, 10, 0, 0x1);
882 static inline void msg_set_grp_bc_ack_req(struct tipc_msg
*m
, bool n
)
884 msg_set_bits(m
, 10, 0, 0x1, n
);
887 static inline u16
msg_grp_bc_seqno(struct tipc_msg
*m
)
889 return msg_bits(m
, 10, 16, 0xffff);
892 static inline void msg_set_grp_bc_seqno(struct tipc_msg
*m
, u32 n
)
894 msg_set_bits(m
, 10, 16, 0xffff, n
);
897 static inline bool msg_peer_link_is_up(struct tipc_msg
*m
)
899 if (likely(msg_user(m
) != LINK_PROTOCOL
))
901 if (msg_type(m
) == STATE_MSG
)
906 static inline bool msg_peer_node_is_up(struct tipc_msg
*m
)
908 if (msg_peer_link_is_up(m
))
910 return msg_redundant_link(m
);
913 static inline bool msg_is_reset(struct tipc_msg
*hdr
)
915 return (msg_user(hdr
) == LINK_PROTOCOL
) && (msg_type(hdr
) == RESET_MSG
);
918 struct sk_buff
*tipc_buf_acquire(u32 size
, gfp_t gfp
);
919 bool tipc_msg_validate(struct sk_buff
*skb
);
920 bool tipc_msg_reverse(u32 own_addr
, struct sk_buff
**skb
, int err
);
921 void tipc_skb_reject(struct net
*net
, int err
, struct sk_buff
*skb
,
922 struct sk_buff_head
*xmitq
);
923 void tipc_msg_init(u32 own_addr
, struct tipc_msg
*m
, u32 user
, u32 type
,
924 u32 hsize
, u32 destnode
);
925 struct sk_buff
*tipc_msg_create(uint user
, uint type
, uint hdr_sz
,
926 uint data_sz
, u32 dnode
, u32 onode
,
927 u32 dport
, u32 oport
, int errcode
);
928 int tipc_buf_append(struct sk_buff
**headbuf
, struct sk_buff
**buf
);
929 bool tipc_msg_bundle(struct sk_buff
*skb
, struct tipc_msg
*msg
, u32 mtu
);
930 bool tipc_msg_make_bundle(struct sk_buff
**skb
, struct tipc_msg
*msg
,
932 bool tipc_msg_extract(struct sk_buff
*skb
, struct sk_buff
**iskb
, int *pos
);
933 int tipc_msg_build(struct tipc_msg
*mhdr
, struct msghdr
*m
,
934 int offset
, int dsz
, int mtu
, struct sk_buff_head
*list
);
935 bool tipc_msg_lookup_dest(struct net
*net
, struct sk_buff
*skb
, int *err
);
936 bool tipc_msg_reassemble(struct sk_buff_head
*list
, struct sk_buff_head
*rcvq
);
937 bool tipc_msg_pskb_copy(u32 dst
, struct sk_buff_head
*msg
,
938 struct sk_buff_head
*cpy
);
939 void __tipc_skb_queue_sorted(struct sk_buff_head
*list
, u16 seqno
,
940 struct sk_buff
*skb
);
942 static inline u16
buf_seqno(struct sk_buff
*skb
)
944 return msg_seqno(buf_msg(skb
));
947 /* tipc_skb_peek(): peek and reserve first buffer in list
948 * @list: list to be peeked in
949 * Returns pointer to first buffer in list, if any
951 static inline struct sk_buff
*tipc_skb_peek(struct sk_buff_head
*list
,
957 skb
= skb_peek(list
);
960 spin_unlock_bh(lock
);
964 /* tipc_skb_peek_port(): find a destination port, ignoring all destinations
965 * up to and including 'filter'.
966 * Note: ignoring previously tried destinations minimizes the risk of
967 * contention on the socket lock
968 * @list: list to be peeked in
969 * @filter: last destination to be ignored from search
970 * Returns a destination port number, of applicable.
972 static inline u32
tipc_skb_peek_port(struct sk_buff_head
*list
, u32 filter
)
978 spin_lock_bh(&list
->lock
);
979 skb_queue_walk(list
, skb
) {
980 dport
= msg_destport(buf_msg(skb
));
981 if (!filter
|| skb_queue_is_last(list
, skb
))
988 spin_unlock_bh(&list
->lock
);
992 /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
993 * @list: list to be unlinked from
994 * @dport: selection criteria for buffer to unlink
996 static inline struct sk_buff
*tipc_skb_dequeue(struct sk_buff_head
*list
,
999 struct sk_buff
*_skb
, *tmp
, *skb
= NULL
;
1001 spin_lock_bh(&list
->lock
);
1002 skb_queue_walk_safe(list
, _skb
, tmp
) {
1003 if (msg_destport(buf_msg(_skb
)) == dport
) {
1004 __skb_unlink(_skb
, list
);
1009 spin_unlock_bh(&list
->lock
);
1013 /* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1014 * @list: the new list to append. Not lock protected
1015 * @head: target list. Lock protected.
1017 static inline void tipc_skb_queue_splice_tail(struct sk_buff_head
*list
,
1018 struct sk_buff_head
*head
)
1020 spin_lock_bh(&head
->lock
);
1021 skb_queue_splice_tail(list
, head
);
1022 spin_unlock_bh(&head
->lock
);
1025 /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1026 * @list: the new list to add. Lock protected. Will be reinitialized
1027 * @head: target list. Lock protected.
1029 static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head
*list
,
1030 struct sk_buff_head
*head
)
1032 struct sk_buff_head tmp
;
1034 __skb_queue_head_init(&tmp
);
1036 spin_lock_bh(&list
->lock
);
1037 skb_queue_splice_tail_init(list
, &tmp
);
1038 spin_unlock_bh(&list
->lock
);
1039 tipc_skb_queue_splice_tail(&tmp
, head
);