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b97bf3fd
PL
1/*
2 * net/tipc/msg.h: Include file for TIPC message header routines
c4307285 3 *
75da2163 4 * Copyright (c) 2000-2007, 2014-2017 Ericsson AB
741de3e9 5 * Copyright (c) 2005-2008, 2010-2011, Wind River Systems
b97bf3fd
PL
6 * All rights reserved.
7 *
9ea1fd3c 8 * Redistribution and use in source and binary forms, with or without
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PL
9 * modification, are permitted provided that the following conditions are met:
10 *
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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.
b97bf3fd 19 *
9ea1fd3c
PL
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.
23 *
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
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PL
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#ifndef _TIPC_MSG_H
38#define _TIPC_MSG_H
39
1da46568 40#include <linux/tipc.h>
d999297c 41#include "core.h"
b97bf3fd 42
cc4c4353
AS
43/*
44 * Constants and routines used to read and write TIPC payload message headers
45 *
46 * Note: Some items are also used with TIPC internal message headers
47 */
b97bf3fd 48#define TIPC_VERSION 2
c637c103 49struct plist;
06d82c91 50
d265fef6 51/*
cc4c4353
AS
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
57 */
e3eea1eb
JPM
58#define TIPC_SYSTEM_IMPORTANCE 4
59
cc4c4353
AS
60
61/*
62 * Payload message types
d265fef6 63 */
75da2163
JM
64#define TIPC_CONN_MSG 0
65#define TIPC_MCAST_MSG 1
66#define TIPC_NAMED_MSG 2
67#define TIPC_DIRECT_MSG 3
ae236fb2
JM
68#define TIPC_GRP_MEMBER_EVT 4
69#define TIPC_GRP_BCAST_MSG 5
5b8dddb6
JM
70#define TIPC_GRP_MCAST_MSG 6
71#define TIPC_GRP_UCAST_MSG 7
d265fef6 72
e3eea1eb
JPM
73/*
74 * Internal message users
75 */
76#define BCAST_PROTOCOL 5
77#define MSG_BUNDLER 6
78#define LINK_PROTOCOL 7
79#define CONN_MANAGER 8
75da2163 80#define GROUP_PROTOCOL 9
dff29b1a 81#define TUNNEL_PROTOCOL 10
e3eea1eb
JPM
82#define NAME_DISTRIBUTOR 11
83#define MSG_FRAGMENTER 12
84#define LINK_CONFIG 13
1ef6f7c9 85#define MSG_CRYPTO 14
e3eea1eb 86#define SOCK_WAKEUP 14 /* pseudo user */
14c04493 87#define TOP_SRV 15 /* pseudo user */
e3eea1eb 88
cc4c4353
AS
89/*
90 * Message header sizes
91 */
741d9eb7
AS
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 */
75da2163 96#define GROUP_H_SIZE 44 /* Group payload message */
06d82c91
AS
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 */
100
b97bf3fd 101#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
4c94cc2d 102#define FB_MTU 3744
91e2eb56 103#define TIPC_MEDIA_INFO_OFFSET 5
3d749a6a 104
859fc7c0 105struct tipc_skb_cb {
fc1b6d6d
TL
106 union {
107 struct {
108 struct sk_buff *tail;
109 unsigned long nxt_retr;
110 unsigned long retr_stamp;
111 u32 bytes_read;
112 u32 orig_member;
113 u16 chain_imp;
114 u16 ackers;
115 u16 retr_cnt;
116 } __packed;
117#ifdef CONFIG_TIPC_CRYPTO
118 struct {
119 struct tipc_crypto *rx;
120 struct tipc_aead *last;
121 u8 recurs;
122 } tx_clone_ctx __packed;
123#endif
124 } __packed;
125 union {
126 struct {
127 u8 validated:1;
128#ifdef CONFIG_TIPC_CRYPTO
129 u8 encrypted:1;
130 u8 decrypted:1;
daef1ee3
TL
131#define SKB_PROBING 1
132#define SKB_GRACING 2
133 u8 xmit_type:2;
fc1b6d6d
TL
134 u8 tx_clone_deferred:1;
135#endif
136 };
137 u8 flags;
138 };
139 u8 reserved;
140#ifdef CONFIG_TIPC_CRYPTO
141 void *crypto_ctx;
142#endif
143} __packed;
859fc7c0
YX
144
145#define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
146
d265fef6
AS
147struct tipc_msg {
148 __be32 hdr[15];
149};
c4307285 150
9195948f
TL
151/* struct tipc_gap_ack - TIPC Gap ACK block
152 * @ack: seqno of the last consecutive packet in link deferdq
153 * @gap: number of gap packets since the last ack
154 *
155 * E.g:
156 * link deferdq: 1 2 3 4 10 11 13 14 15 20
157 * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0>
158 */
159struct tipc_gap_ack {
160 __be16 ack;
161 __be16 gap;
162};
163
164/* struct tipc_gap_ack_blks
165 * @len: actual length of the record
d7626b5a
TL
166 * @ugack_cnt: number of Gap ACK blocks for unicast (following the broadcast
167 * ones)
168 * @start_index: starting index for "valid" broadcast Gap ACK blocks
169 * @bgack_cnt: number of Gap ACK blocks for broadcast in the record
9195948f 170 * @gacks: array of Gap ACK blocks
d7626b5a
TL
171 *
172 * 31 16 15 0
173 * +-------------+-------------+-------------+-------------+
174 * | bgack_cnt | ugack_cnt | len |
175 * +-------------+-------------+-------------+-------------+ -
176 * | gap | ack | |
177 * +-------------+-------------+-------------+-------------+ > bc gacks
178 * : : : |
179 * +-------------+-------------+-------------+-------------+ -
180 * | gap | ack | |
181 * +-------------+-------------+-------------+-------------+ > uc gacks
182 * : : : |
183 * +-------------+-------------+-------------+-------------+ -
9195948f
TL
184 */
185struct tipc_gap_ack_blks {
186 __be16 len;
d7626b5a
TL
187 union {
188 u8 ugack_cnt;
189 u8 start_index;
190 };
191 u8 bgack_cnt;
9195948f
TL
192 struct tipc_gap_ack gacks[];
193};
194
d7626b5a 195#define MAX_GAP_ACK_BLKS 128
e034c6d2
GS
196#define MAX_GAP_ACK_BLKS_SZ (sizeof(struct tipc_gap_ack_blks) + \
197 sizeof(struct tipc_gap_ack) * MAX_GAP_ACK_BLKS)
9195948f 198
859fc7c0
YX
199static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
200{
201 return (struct tipc_msg *)skb->data;
202}
203
d265fef6
AS
204static inline u32 msg_word(struct tipc_msg *m, u32 pos)
205{
206 return ntohl(m->hdr[pos]);
207}
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PL
208
209static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
210{
211 m->hdr[w] = htonl(val);
212}
213
d265fef6
AS
214static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
215{
216 return (msg_word(m, w) >> pos) & mask;
217}
218
b97bf3fd
PL
219static inline void msg_set_bits(struct tipc_msg *m, u32 w,
220 u32 pos, u32 mask, u32 val)
221{
1f9eda7e 222 val = (val & mask) << pos;
becf3da2
AV
223 mask = mask << pos;
224 m->hdr[w] &= ~htonl(mask);
225 m->hdr[w] |= htonl(val);
b97bf3fd
PL
226}
227
40aecb1b
AS
228static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
229{
230 u32 temp = msg->hdr[a];
231
232 msg->hdr[a] = msg->hdr[b];
233 msg->hdr[b] = temp;
234}
235
c4307285 236/*
b97bf3fd
PL
237 * Word 0
238 */
b97bf3fd
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239static inline u32 msg_version(struct tipc_msg *m)
240{
241 return msg_bits(m, 0, 29, 7);
242}
243
c4307285 244static inline void msg_set_version(struct tipc_msg *m)
b97bf3fd 245{
37695420 246 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
b97bf3fd
PL
247}
248
249static inline u32 msg_user(struct tipc_msg *m)
250{
251 return msg_bits(m, 0, 25, 0xf);
252}
253
254static inline u32 msg_isdata(struct tipc_msg *m)
255{
a02cec21 256 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
b97bf3fd
PL
257}
258
c4307285 259static inline void msg_set_user(struct tipc_msg *m, u32 n)
b97bf3fd
PL
260{
261 msg_set_bits(m, 0, 25, 0xf, n);
262}
263
d265fef6
AS
264static inline u32 msg_hdr_sz(struct tipc_msg *m)
265{
266 return msg_bits(m, 0, 21, 0xf) << 2;
267}
268
0e65967e 269static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
b97bf3fd
PL
270{
271 msg_set_bits(m, 0, 21, 0xf, n>>2);
272}
273
d265fef6
AS
274static inline u32 msg_size(struct tipc_msg *m)
275{
276 return msg_bits(m, 0, 0, 0x1ffff);
277}
278
5b8dddb6
JM
279static inline u32 msg_blocks(struct tipc_msg *m)
280{
281 return (msg_size(m) / 1024) + 1;
282}
283
d265fef6
AS
284static inline u32 msg_data_sz(struct tipc_msg *m)
285{
286 return msg_size(m) - msg_hdr_sz(m);
287}
288
c4307285 289static inline int msg_non_seq(struct tipc_msg *m)
b97bf3fd
PL
290{
291 return msg_bits(m, 0, 20, 1);
292}
293
40aecb1b 294static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
b97bf3fd 295{
40aecb1b 296 msg_set_bits(m, 0, 20, 1, n);
b97bf3fd
PL
297}
298
25b9221b
JM
299static inline int msg_is_syn(struct tipc_msg *m)
300{
301 return msg_bits(m, 0, 17, 1);
302}
303
304static inline void msg_set_syn(struct tipc_msg *m, u32 d)
305{
306 msg_set_bits(m, 0, 17, 1, d);
307}
308
c4307285 309static inline int msg_dest_droppable(struct tipc_msg *m)
b97bf3fd
PL
310{
311 return msg_bits(m, 0, 19, 1);
312}
313
c4307285 314static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
b97bf3fd
PL
315{
316 msg_set_bits(m, 0, 19, 1, d);
317}
318
8d6e79d3
JM
319static inline int msg_is_keepalive(struct tipc_msg *m)
320{
321 return msg_bits(m, 0, 19, 1);
322}
323
324static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
325{
326 msg_set_bits(m, 0, 19, 1, d);
327}
328
c4307285 329static inline int msg_src_droppable(struct tipc_msg *m)
b97bf3fd
PL
330{
331 return msg_bits(m, 0, 18, 1);
332}
333
c4307285 334static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
b97bf3fd
PL
335{
336 msg_set_bits(m, 0, 18, 1, d);
337}
338
c0bceb97
JM
339static inline int msg_ack_required(struct tipc_msg *m)
340{
341 return msg_bits(m, 0, 18, 1);
342}
343
0a3e060f 344static inline void msg_set_ack_required(struct tipc_msg *m)
c0bceb97 345{
0a3e060f
TL
346 msg_set_bits(m, 0, 18, 1, 1);
347}
348
349static inline int msg_nagle_ack(struct tipc_msg *m)
350{
351 return msg_bits(m, 0, 18, 1);
352}
353
354static inline void msg_set_nagle_ack(struct tipc_msg *m)
355{
356 msg_set_bits(m, 0, 18, 1, 1);
c0bceb97
JM
357}
358
c55c8eda
HL
359static inline bool msg_is_rcast(struct tipc_msg *m)
360{
361 return msg_bits(m, 0, 18, 0x1);
362}
363
364static inline void msg_set_is_rcast(struct tipc_msg *m, bool d)
365{
366 msg_set_bits(m, 0, 18, 0x1, d);
367}
368
b97bf3fd
PL
369static inline void msg_set_size(struct tipc_msg *m, u32 sz)
370{
371 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
372}
373
3127a020
JPM
374static inline unchar *msg_data(struct tipc_msg *m)
375{
376 return ((unchar *)m) + msg_hdr_sz(m);
377}
378
a7dc51ad 379static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m)
3127a020
JPM
380{
381 return (struct tipc_msg *)msg_data(m);
382}
b97bf3fd 383
c4307285 384/*
b97bf3fd
PL
385 * Word 1
386 */
d265fef6
AS
387static inline u32 msg_type(struct tipc_msg *m)
388{
389 return msg_bits(m, 1, 29, 0x7);
390}
391
c4307285 392static inline void msg_set_type(struct tipc_msg *m, u32 n)
b97bf3fd
PL
393{
394 msg_set_bits(m, 1, 29, 0x7, n);
395}
396
75da2163
JM
397static inline int msg_in_group(struct tipc_msg *m)
398{
ae236fb2
JM
399 int mtyp = msg_type(m);
400
27bd9ec0 401 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
ae236fb2
JM
402}
403
404static inline bool msg_is_grp_evt(struct tipc_msg *m)
405{
406 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
75da2163
JM
407}
408
d265fef6
AS
409static inline u32 msg_named(struct tipc_msg *m)
410{
411 return msg_type(m) == TIPC_NAMED_MSG;
412}
413
414static inline u32 msg_mcast(struct tipc_msg *m)
415{
75da2163
JM
416 int mtyp = msg_type(m);
417
5b8dddb6
JM
418 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
419 (mtyp == TIPC_GRP_MCAST_MSG));
d265fef6
AS
420}
421
422static inline u32 msg_connected(struct tipc_msg *m)
423{
424 return msg_type(m) == TIPC_CONN_MSG;
425}
426
8b1e5b0a
HL
427static inline u32 msg_direct(struct tipc_msg *m)
428{
429 return msg_type(m) == TIPC_DIRECT_MSG;
430}
431
d265fef6
AS
432static inline u32 msg_errcode(struct tipc_msg *m)
433{
434 return msg_bits(m, 1, 25, 0xf);
435}
436
c4307285 437static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
b97bf3fd
PL
438{
439 msg_set_bits(m, 1, 25, 0xf, err);
440}
441
cad2929d
HHL
442static inline void msg_set_bulk(struct tipc_msg *m)
443{
444 msg_set_bits(m, 1, 28, 0x1, 1);
445}
446
447static inline u32 msg_is_bulk(struct tipc_msg *m)
448{
449 return msg_bits(m, 1, 28, 0x1);
450}
451
452static inline void msg_set_last_bulk(struct tipc_msg *m)
453{
454 msg_set_bits(m, 1, 27, 0x1, 1);
455}
456
457static inline u32 msg_is_last_bulk(struct tipc_msg *m)
458{
459 return msg_bits(m, 1, 27, 0x1);
460}
461
462static inline void msg_set_non_legacy(struct tipc_msg *m)
463{
464 msg_set_bits(m, 1, 26, 0x1, 1);
465}
466
467static inline u32 msg_is_legacy(struct tipc_msg *m)
468{
469 return !msg_bits(m, 1, 26, 0x1);
470}
471
c4307285 472static inline u32 msg_reroute_cnt(struct tipc_msg *m)
b97bf3fd
PL
473{
474 return msg_bits(m, 1, 21, 0xf);
475}
476
c4307285 477static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
b97bf3fd
PL
478{
479 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
480}
481
c4307285 482static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
b97bf3fd
PL
483{
484 msg_set_bits(m, 1, 21, 0xf, 0);
485}
486
487static inline u32 msg_lookup_scope(struct tipc_msg *m)
488{
489 return msg_bits(m, 1, 19, 0x3);
490}
491
c4307285 492static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
b97bf3fd
PL
493{
494 msg_set_bits(m, 1, 19, 0x3, n);
495}
496
e4bf4f76 497static inline u16 msg_bcast_ack(struct tipc_msg *m)
b97bf3fd
PL
498{
499 return msg_bits(m, 1, 0, 0xffff);
500}
501
e4bf4f76 502static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
b97bf3fd
PL
503{
504 msg_set_bits(m, 1, 0, 0xffff, n);
505}
506
91986ee1
TL
507/* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch
508 * link peer session number
509 */
510static inline bool msg_dest_session_valid(struct tipc_msg *m)
511{
512 return msg_bits(m, 1, 16, 0x1);
513}
514
515static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid)
516{
517 msg_set_bits(m, 1, 16, 0x1, valid);
518}
519
520static inline u16 msg_dest_session(struct tipc_msg *m)
521{
522 return msg_bits(m, 1, 0, 0xffff);
523}
524
525static inline void msg_set_dest_session(struct tipc_msg *m, u16 n)
526{
527 msg_set_bits(m, 1, 0, 0xffff, n);
528}
b97bf3fd 529
c4307285 530/*
b97bf3fd
PL
531 * Word 2
532 */
e4bf4f76 533static inline u16 msg_ack(struct tipc_msg *m)
b97bf3fd
PL
534{
535 return msg_bits(m, 2, 16, 0xffff);
536}
537
e4bf4f76 538static inline void msg_set_ack(struct tipc_msg *m, u16 n)
b97bf3fd
PL
539{
540 msg_set_bits(m, 2, 16, 0xffff, n);
541}
542
e4bf4f76 543static inline u16 msg_seqno(struct tipc_msg *m)
b97bf3fd
PL
544{
545 return msg_bits(m, 2, 0, 0xffff);
546}
547
e4bf4f76 548static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
b97bf3fd
PL
549{
550 msg_set_bits(m, 2, 0, 0xffff, n);
551}
552
c4307285 553/*
b97bf3fd
PL
554 * Words 3-10
555 */
e3eea1eb
JPM
556static inline u32 msg_importance(struct tipc_msg *m)
557{
f21e897e
JPM
558 int usr = msg_user(m);
559
560 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
561 return usr;
562 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
dde4b5ae 563 return msg_bits(m, 9, 0, 0x7);
e3eea1eb
JPM
564 return TIPC_SYSTEM_IMPORTANCE;
565}
566
567static inline void msg_set_importance(struct tipc_msg *m, u32 i)
568{
f21e897e
JPM
569 int usr = msg_user(m);
570
571 if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)))
dde4b5ae 572 msg_set_bits(m, 9, 0, 0x7, i);
f21e897e 573 else if (i < TIPC_SYSTEM_IMPORTANCE)
e3eea1eb
JPM
574 msg_set_user(m, i);
575 else
576 pr_warn("Trying to set illegal importance in message\n");
577}
578
d265fef6
AS
579static inline u32 msg_prevnode(struct tipc_msg *m)
580{
581 return msg_word(m, 3);
582}
583
c4307285 584static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
b97bf3fd
PL
585{
586 msg_set_word(m, 3, a);
587}
588
d265fef6
AS
589static inline u32 msg_origport(struct tipc_msg *m)
590{
3127a020 591 if (msg_user(m) == MSG_FRAGMENTER)
a7dc51ad 592 m = msg_inner_hdr(m);
d265fef6
AS
593 return msg_word(m, 4);
594}
595
c4307285 596static inline void msg_set_origport(struct tipc_msg *m, u32 p)
b97bf3fd
PL
597{
598 msg_set_word(m, 4, p);
599}
600
cad2929d
HHL
601static inline u16 msg_named_seqno(struct tipc_msg *m)
602{
603 return msg_bits(m, 4, 0, 0xffff);
604}
605
606static inline void msg_set_named_seqno(struct tipc_msg *m, u16 n)
607{
608 msg_set_bits(m, 4, 0, 0xffff, n);
609}
610
d265fef6
AS
611static inline u32 msg_destport(struct tipc_msg *m)
612{
613 return msg_word(m, 5);
614}
615
c4307285 616static inline void msg_set_destport(struct tipc_msg *m, u32 p)
b97bf3fd
PL
617{
618 msg_set_word(m, 5, p);
619}
620
d265fef6
AS
621static inline u32 msg_mc_netid(struct tipc_msg *m)
622{
623 return msg_word(m, 5);
624}
625
c4307285 626static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
b97bf3fd
PL
627{
628 msg_set_word(m, 5, p);
629}
630
d265fef6
AS
631static inline int msg_short(struct tipc_msg *m)
632{
741d9eb7 633 return msg_hdr_sz(m) == SHORT_H_SIZE;
d265fef6
AS
634}
635
636static inline u32 msg_orignode(struct tipc_msg *m)
637{
638 if (likely(msg_short(m)))
639 return msg_prevnode(m);
640 return msg_word(m, 6);
641}
642
c4307285 643static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
b97bf3fd
PL
644{
645 msg_set_word(m, 6, a);
646}
647
d265fef6
AS
648static inline u32 msg_destnode(struct tipc_msg *m)
649{
650 return msg_word(m, 7);
651}
652
c4307285 653static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
b97bf3fd
PL
654{
655 msg_set_word(m, 7, a);
656}
657
d265fef6
AS
658static inline u32 msg_nametype(struct tipc_msg *m)
659{
660 return msg_word(m, 8);
661}
662
c4307285 663static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
b97bf3fd
PL
664{
665 msg_set_word(m, 8, n);
666}
667
d265fef6
AS
668static inline u32 msg_nameinst(struct tipc_msg *m)
669{
670 return msg_word(m, 9);
671}
672
673static inline u32 msg_namelower(struct tipc_msg *m)
674{
675 return msg_nameinst(m);
676}
677
c4307285 678static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
b97bf3fd
PL
679{
680 msg_set_word(m, 9, n);
681}
682
c4307285 683static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
b97bf3fd
PL
684{
685 msg_set_namelower(m, n);
686}
687
d265fef6
AS
688static inline u32 msg_nameupper(struct tipc_msg *m)
689{
690 return msg_word(m, 10);
691}
692
c4307285 693static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
b97bf3fd
PL
694{
695 msg_set_word(m, 10, n);
696}
697
b97bf3fd 698/*
cc4c4353
AS
699 * Constants and routines used to read and write TIPC internal message headers
700 */
b97bf3fd 701
c4307285 702/*
cc4c4353 703 * Connection management protocol message types
b97bf3fd 704 */
b97bf3fd
PL
705#define CONN_PROBE 0
706#define CONN_PROBE_REPLY 1
707#define CONN_ACK 2
708
c4307285 709/*
cc4c4353 710 * Name distributor message types
b97bf3fd 711 */
b97bf3fd
PL
712#define PUBLICATION 0
713#define WITHDRAWAL 1
714
92138d1f
AS
715/*
716 * Segmentation message types
717 */
92138d1f
AS
718#define FIRST_FRAGMENT 0
719#define FRAGMENT 1
720#define LAST_FRAGMENT 2
721
722/*
723 * Link management protocol message types
724 */
92138d1f
AS
725#define STATE_MSG 0
726#define RESET_MSG 1
727#define ACTIVATE_MSG 2
728
729/*
730 * Changeover tunnel message types
731 */
dff29b1a
JPM
732#define SYNCH_MSG 0
733#define FAILOVER_MSG 1
92138d1f
AS
734
735/*
736 * Config protocol message types
737 */
92138d1f
AS
738#define DSC_REQ_MSG 0
739#define DSC_RESP_MSG 1
25b0b9c4
JM
740#define DSC_TRIAL_MSG 2
741#define DSC_TRIAL_FAIL_MSG 3
92138d1f 742
75da2163
JM
743/*
744 * Group protocol message types
745 */
746#define GRP_JOIN_MSG 0
747#define GRP_LEAVE_MSG 1
b7d42635 748#define GRP_ADV_MSG 2
2f487712 749#define GRP_ACK_MSG 3
04d7b574
JM
750#define GRP_RECLAIM_MSG 4
751#define GRP_REMIT_MSG 5
75da2163 752
1ef6f7c9
TL
753/* Crypto message types */
754#define KEY_DISTR_MSG 0
755
c4307285 756/*
b97bf3fd
PL
757 * Word 1
758 */
b97bf3fd
PL
759static inline u32 msg_seq_gap(struct tipc_msg *m)
760{
bd784533 761 return msg_bits(m, 1, 16, 0x1fff);
b97bf3fd
PL
762}
763
764static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
765{
bd784533 766 msg_set_bits(m, 1, 16, 0x1fff, n);
b97bf3fd
PL
767}
768
fc0eea69
AS
769static inline u32 msg_node_sig(struct tipc_msg *m)
770{
771 return msg_bits(m, 1, 0, 0xffff);
772}
773
774static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
775{
776 msg_set_bits(m, 1, 0, 0xffff, n);
777}
778
7764d6e8
JPM
779static inline u32 msg_node_capabilities(struct tipc_msg *m)
780{
781 return msg_bits(m, 1, 15, 0x1fff);
782}
783
784static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
785{
786 msg_set_bits(m, 1, 15, 0x1fff, n);
787}
788
c4307285 789/*
b97bf3fd
PL
790 * Word 2
791 */
b97bf3fd
PL
792static inline u32 msg_dest_domain(struct tipc_msg *m)
793{
794 return msg_word(m, 2);
795}
796
c4307285 797static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
b97bf3fd
PL
798{
799 msg_set_word(m, 2, n);
800}
801
802static inline u32 msg_bcgap_after(struct tipc_msg *m)
803{
804 return msg_bits(m, 2, 16, 0xffff);
805}
806
807static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
808{
809 msg_set_bits(m, 2, 16, 0xffff, n);
810}
811
812static inline u32 msg_bcgap_to(struct tipc_msg *m)
813{
814 return msg_bits(m, 2, 0, 0xffff);
815}
816
c4307285 817static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
b97bf3fd
PL
818{
819 msg_set_bits(m, 2, 0, 0xffff, n);
820}
821
c4307285 822/*
b97bf3fd
PL
823 * Word 4
824 */
b97bf3fd
PL
825static inline u32 msg_last_bcast(struct tipc_msg *m)
826{
827 return msg_bits(m, 4, 16, 0xffff);
828}
829
52666986
JPM
830static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
831{
832 return msg_last_bcast(m) + 1;
833}
834
b97bf3fd
PL
835static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
836{
837 msg_set_bits(m, 4, 16, 0xffff, n);
838}
839
2320bcda
TL
840static inline u32 msg_nof_fragms(struct tipc_msg *m)
841{
842 return msg_bits(m, 4, 0, 0xffff);
843}
844
845static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n)
846{
847 msg_set_bits(m, 4, 0, 0xffff, n);
848}
849
850static inline u32 msg_fragm_no(struct tipc_msg *m)
851{
852 return msg_bits(m, 4, 16, 0xffff);
853}
854
b97bf3fd
PL
855static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
856{
857 msg_set_bits(m, 4, 16, 0xffff, n);
858}
859
6e498158 860static inline u16 msg_next_sent(struct tipc_msg *m)
b97bf3fd
PL
861{
862 return msg_bits(m, 4, 0, 0xffff);
863}
864
6e498158 865static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
b97bf3fd
PL
866{
867 msg_set_bits(m, 4, 0, 0xffff, n);
868}
869
b97bf3fd
PL
870static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
871{
872 msg_set_bits(m, 4, 0, 0xffff, n);
873}
874
875static inline u32 msg_bc_netid(struct tipc_msg *m)
876{
877 return msg_word(m, 4);
878}
879
880static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
881{
882 msg_set_word(m, 4, id);
883}
884
885static inline u32 msg_link_selector(struct tipc_msg *m)
886{
a853e4c6
JPM
887 if (msg_user(m) == MSG_FRAGMENTER)
888 m = (void *)msg_data(m);
b97bf3fd
PL
889 return msg_bits(m, 4, 0, 1);
890}
891
c4307285 892/*
b97bf3fd
PL
893 * Word 5
894 */
d999297c 895static inline u16 msg_session(struct tipc_msg *m)
b97bf3fd
PL
896{
897 return msg_bits(m, 5, 16, 0xffff);
898}
899
d999297c 900static inline void msg_set_session(struct tipc_msg *m, u16 n)
b97bf3fd
PL
901{
902 msg_set_bits(m, 5, 16, 0xffff, n);
903}
904
905static inline u32 msg_probe(struct tipc_msg *m)
906{
907 return msg_bits(m, 5, 0, 1);
908}
909
910static inline void msg_set_probe(struct tipc_msg *m, u32 val)
911{
7eb878ed 912 msg_set_bits(m, 5, 0, 1, val);
b97bf3fd
PL
913}
914
915static inline char msg_net_plane(struct tipc_msg *m)
916{
917 return msg_bits(m, 5, 1, 7) + 'A';
918}
919
920static inline void msg_set_net_plane(struct tipc_msg *m, char n)
921{
922 msg_set_bits(m, 5, 1, 7, (n - 'A'));
923}
924
925static inline u32 msg_linkprio(struct tipc_msg *m)
926{
927 return msg_bits(m, 5, 4, 0x1f);
928}
929
930static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
931{
932 msg_set_bits(m, 5, 4, 0x1f, n);
933}
934
935static inline u32 msg_bearer_id(struct tipc_msg *m)
936{
937 return msg_bits(m, 5, 9, 0x7);
938}
939
940static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
941{
942 msg_set_bits(m, 5, 9, 0x7, n);
943}
944
945static inline u32 msg_redundant_link(struct tipc_msg *m)
946{
947 return msg_bits(m, 5, 12, 0x1);
948}
949
77f167fc 950static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
b97bf3fd 951{
77f167fc 952 msg_set_bits(m, 5, 12, 0x1, r);
b97bf3fd
PL
953}
954
634696b1
JPM
955static inline u32 msg_peer_stopping(struct tipc_msg *m)
956{
957 return msg_bits(m, 5, 13, 0x1);
958}
959
960static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
961{
962 msg_set_bits(m, 5, 13, 0x1, s);
963}
964
06bd2b1e
JPM
965static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
966{
967 switch (msg_user(m)) {
968 case BCAST_PROTOCOL:
969 case NAME_DISTRIBUTOR:
970 case LINK_PROTOCOL:
971 return msg_bits(m, 5, 14, 0x1);
972 default:
973 return false;
974 }
975}
976
977static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
978{
979 msg_set_bits(m, 5, 14, 0x1, invalid);
980}
981
3d749a6a
AS
982static inline char *msg_media_addr(struct tipc_msg *m)
983{
91e2eb56 984 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
3d749a6a 985}
b97bf3fd 986
02d11ca2
JPM
987static inline u32 msg_bc_gap(struct tipc_msg *m)
988{
989 return msg_bits(m, 8, 0, 0x3ff);
990}
991
992static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
993{
994 msg_set_bits(m, 8, 0, 0x3ff, n);
995}
996
c4307285 997/*
b97bf3fd
PL
998 * Word 9
999 */
6e498158 1000static inline u16 msg_msgcnt(struct tipc_msg *m)
b97bf3fd
PL
1001{
1002 return msg_bits(m, 9, 16, 0xffff);
1003}
1004
6e498158 1005static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
b97bf3fd
PL
1006{
1007 msg_set_bits(m, 9, 16, 0xffff, n);
1008}
1009
4929a932
TL
1010static inline u16 msg_syncpt(struct tipc_msg *m)
1011{
1012 return msg_bits(m, 9, 16, 0xffff);
1013}
1014
1015static inline void msg_set_syncpt(struct tipc_msg *m, u16 n)
1016{
1017 msg_set_bits(m, 9, 16, 0xffff, n);
1018}
1019
10724cc7 1020static inline u32 msg_conn_ack(struct tipc_msg *m)
b97bf3fd
PL
1021{
1022 return msg_bits(m, 9, 16, 0xffff);
1023}
1024
10724cc7 1025static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
b97bf3fd
PL
1026{
1027 msg_set_bits(m, 9, 16, 0xffff, n);
1028}
1029
b7d42635 1030static inline u16 msg_adv_win(struct tipc_msg *m)
10724cc7
JPM
1031{
1032 return msg_bits(m, 9, 0, 0xffff);
1033}
1034
b7d42635 1035static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
10724cc7
JPM
1036{
1037 msg_set_bits(m, 9, 0, 0xffff, n);
1038}
1039
c4307285 1040static inline u32 msg_max_pkt(struct tipc_msg *m)
b97bf3fd 1041{
a02cec21 1042 return msg_bits(m, 9, 16, 0xffff) * 4;
b97bf3fd
PL
1043}
1044
c4307285 1045static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
b97bf3fd
PL
1046{
1047 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
1048}
1049
1050static inline u32 msg_link_tolerance(struct tipc_msg *m)
1051{
1052 return msg_bits(m, 9, 0, 0xffff);
1053}
1054
1055static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
1056{
1057 msg_set_bits(m, 9, 0, 0xffff, n);
1058}
1059
75da2163
JM
1060static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
1061{
1062 return msg_bits(m, 9, 16, 0xffff);
1063}
1064
1065static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
1066{
1067 msg_set_bits(m, 9, 16, 0xffff, n);
1068}
1069
2f487712
JM
1070static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
1071{
1072 return msg_bits(m, 9, 16, 0xffff);
1073}
1074
1075static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
1076{
1077 msg_set_bits(m, 9, 16, 0xffff, n);
1078}
1079
04d7b574
JM
1080static inline u16 msg_grp_remitted(struct tipc_msg *m)
1081{
1082 return msg_bits(m, 9, 16, 0xffff);
1083}
1084
1085static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
1086{
1087 msg_set_bits(m, 9, 16, 0xffff, n);
1088}
1089
75da2163
JM
1090/* Word 10
1091 */
ae236fb2
JM
1092static inline u16 msg_grp_evt(struct tipc_msg *m)
1093{
1094 return msg_bits(m, 10, 0, 0x3);
1095}
1096
1097static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
1098{
1099 msg_set_bits(m, 10, 0, 0x3, n);
1100}
1101
2f487712
JM
1102static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
1103{
1104 return msg_bits(m, 10, 0, 0x1);
1105}
1106
1107static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
1108{
1109 msg_set_bits(m, 10, 0, 0x1, n);
1110}
1111
75da2163
JM
1112static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
1113{
1114 return msg_bits(m, 10, 16, 0xffff);
1115}
1116
1117static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
1118{
1119 msg_set_bits(m, 10, 16, 0xffff, n);
1120}
1121
6e498158 1122static inline bool msg_peer_link_is_up(struct tipc_msg *m)
1a20cc25 1123{
d999297c 1124 if (likely(msg_user(m) != LINK_PROTOCOL))
1a20cc25 1125 return true;
6e498158
JPM
1126 if (msg_type(m) == STATE_MSG)
1127 return true;
1128 return false;
d999297c
JPM
1129}
1130
6e498158 1131static inline bool msg_peer_node_is_up(struct tipc_msg *m)
d999297c 1132{
6e498158
JPM
1133 if (msg_peer_link_is_up(m))
1134 return true;
1a20cc25
JPM
1135 return msg_redundant_link(m);
1136}
1137
5b7066c3
JPM
1138static inline bool msg_is_reset(struct tipc_msg *hdr)
1139{
1140 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
1141}
1142
f73b1281
HL
1143/* Word 13
1144 */
1145static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n)
1146{
1147 msg_set_word(m, 13, n);
1148}
1149
1150static inline u32 msg_peer_net_hash(struct tipc_msg *m)
1151{
1152 return msg_word(m, 13);
1153}
1154
1155/* Word 14
1156 */
25b0b9c4
JM
1157static inline u32 msg_sugg_node_addr(struct tipc_msg *m)
1158{
1159 return msg_word(m, 14);
1160}
1161
1162static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n)
1163{
1164 msg_set_word(m, 14, n);
1165}
1166
1167static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id)
1168{
1169 memcpy(msg_data(hdr), id, 16);
1170}
1171
1172static inline u8 *msg_node_id(struct tipc_msg *hdr)
1173{
1174 return (u8 *)msg_data(hdr);
1175}
1176
57d5f64d 1177struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
d618d09a 1178bool tipc_msg_validate(struct sk_buff **_skb);
bcd3ffd4 1179bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
64ac5f59
JM
1180void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
1181 struct sk_buff_head *xmitq);
c5898636 1182void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
34747539 1183 u32 hsize, u32 destnode);
e3a77561
JPM
1184struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
1185 uint data_sz, u32 dnode, u32 onode,
1186 u32 dport, u32 oport, int errcode);
37e22164 1187int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
06e7c70c
TL
1188bool tipc_msg_try_bundle(struct sk_buff *tskb, struct sk_buff **skb, u32 mss,
1189 u32 dnode, bool *new_bundle);
c637c103 1190bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
2320bcda
TL
1191int tipc_msg_fragment(struct sk_buff *skb, const struct tipc_msg *hdr,
1192 int pktmax, struct sk_buff_head *frags);
c5898636 1193int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
34747539 1194 int offset, int dsz, int mtu, struct sk_buff_head *list);
c0bceb97
JM
1195int tipc_msg_append(struct tipc_msg *hdr, struct msghdr *m, int dlen,
1196 int mss, struct sk_buff_head *txq);
cda3696d 1197bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
4c94cc2d 1198bool tipc_msg_assemble(struct sk_buff_head *list);
2f566124 1199bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
a853e4c6
JPM
1200bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
1201 struct sk_buff_head *cpy);
03b6fefd 1202bool __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
8306f99a 1203 struct sk_buff *skb);
67879274 1204bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy);
078bec82 1205
e4bf4f76
JPM
1206static inline u16 buf_seqno(struct sk_buff *skb)
1207{
1208 return msg_seqno(buf_msg(skb));
1209}
1210
d618d09a
JM
1211static inline int buf_roundup_len(struct sk_buff *skb)
1212{
1213 return (skb->len / 1024 + 1) * 1024;
1214}
1215
cb1b7280
JPM
1216/* tipc_skb_peek(): peek and reserve first buffer in list
1217 * @list: list to be peeked in
1218 * Returns pointer to first buffer in list, if any
1219 */
1220static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
1221 spinlock_t *lock)
1222{
1223 struct sk_buff *skb;
1224
1225 spin_lock_bh(lock);
1226 skb = skb_peek(list);
1227 if (skb)
1228 skb_get(skb);
1229 spin_unlock_bh(lock);
1230 return skb;
1231}
1232
c637c103
JPM
1233/* tipc_skb_peek_port(): find a destination port, ignoring all destinations
1234 * up to and including 'filter'.
1235 * Note: ignoring previously tried destinations minimizes the risk of
1236 * contention on the socket lock
1237 * @list: list to be peeked in
1238 * @filter: last destination to be ignored from search
1239 * Returns a destination port number, of applicable.
1240 */
1241static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
1242{
1243 struct sk_buff *skb;
1244 u32 dport = 0;
1245 bool ignore = true;
1246
1247 spin_lock_bh(&list->lock);
1248 skb_queue_walk(list, skb) {
1249 dport = msg_destport(buf_msg(skb));
1250 if (!filter || skb_queue_is_last(list, skb))
1251 break;
1252 if (dport == filter)
1253 ignore = false;
1254 else if (!ignore)
1255 break;
1256 }
1257 spin_unlock_bh(&list->lock);
1258 return dport;
1259}
1260
1261/* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1262 * @list: list to be unlinked from
1263 * @dport: selection criteria for buffer to unlink
1264 */
1265static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1266 u32 dport)
1267{
1268 struct sk_buff *_skb, *tmp, *skb = NULL;
1269
1270 spin_lock_bh(&list->lock);
1271 skb_queue_walk_safe(list, _skb, tmp) {
1272 if (msg_destport(buf_msg(_skb)) == dport) {
1273 __skb_unlink(_skb, list);
1274 skb = _skb;
1275 break;
1276 }
1277 }
1278 spin_unlock_bh(&list->lock);
1279 return skb;
1280}
1281
598411d7
JPM
1282/* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1283 * @list: the new list to append. Not lock protected
1284 * @head: target list. Lock protected.
1285 */
1286static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1287 struct sk_buff_head *head)
1288{
1289 spin_lock_bh(&head->lock);
1290 skb_queue_splice_tail(list, head);
1291 spin_unlock_bh(&head->lock);
1292}
1293
1294/* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1295 * @list: the new list to add. Lock protected. Will be reinitialized
1296 * @head: target list. Lock protected.
1297 */
1298static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1299 struct sk_buff_head *head)
1300{
1301 struct sk_buff_head tmp;
1302
1303 __skb_queue_head_init(&tmp);
1304
1305 spin_lock_bh(&list->lock);
1306 skb_queue_splice_tail_init(list, &tmp);
1307 spin_unlock_bh(&list->lock);
1308 tipc_skb_queue_splice_tail(&tmp, head);
1309}
1310
382f598f
TL
1311/* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno
1312 * @list: list to be dequeued from
1313 * @seqno: seqno of the expected msg
1314 *
1315 * returns skb dequeued from the list if its seqno is less than or equal to
1316 * the expected one, otherwise the skb is still hold
1317 *
1318 * Note: must be used with appropriate locks held only
1319 */
1320static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list,
1321 u16 seqno)
1322{
1323 struct sk_buff *skb = skb_peek(list);
1324
1325 if (skb && less_eq(buf_seqno(skb), seqno)) {
1326 __skb_unlink(skb, list);
1327 return skb;
1328 }
1329 return NULL;
1330}
1331
b97bf3fd 1332#endif