Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/msg.h: Include file for TIPC message header routines | |
c4307285 | 3 | * |
cf2157f8 | 4 | * Copyright (c) 2000-2007, 2014-2015 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 |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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 | |
b97bf3fd 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 | 49 | struct 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 | */ |
d265fef6 AS |
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 | ||
e3eea1eb JPM |
69 | /* |
70 | * Internal message users | |
71 | */ | |
72 | #define BCAST_PROTOCOL 5 | |
73 | #define MSG_BUNDLER 6 | |
74 | #define LINK_PROTOCOL 7 | |
75 | #define CONN_MANAGER 8 | |
dff29b1a | 76 | #define TUNNEL_PROTOCOL 10 |
e3eea1eb JPM |
77 | #define NAME_DISTRIBUTOR 11 |
78 | #define MSG_FRAGMENTER 12 | |
79 | #define LINK_CONFIG 13 | |
80 | #define SOCK_WAKEUP 14 /* pseudo user */ | |
81 | ||
cc4c4353 AS |
82 | /* |
83 | * Message header sizes | |
84 | */ | |
741d9eb7 AS |
85 | #define SHORT_H_SIZE 24 /* In-cluster basic payload message */ |
86 | #define BASIC_H_SIZE 32 /* Basic payload message */ | |
87 | #define NAMED_H_SIZE 40 /* Named payload message */ | |
88 | #define MCAST_H_SIZE 44 /* Multicast payload message */ | |
06d82c91 AS |
89 | #define INT_H_SIZE 40 /* Internal messages */ |
90 | #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */ | |
91 | #define MAX_H_SIZE 60 /* Largest possible TIPC header size */ | |
92 | ||
b97bf3fd | 93 | #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) |
b97bf3fd | 94 | |
91e2eb56 | 95 | #define TIPC_MEDIA_INFO_OFFSET 5 |
3d749a6a | 96 | |
859fc7c0 | 97 | struct tipc_skb_cb { |
ba8aebe9 | 98 | u32 bytes_read; |
859fc7c0 | 99 | struct sk_buff *tail; |
cf2157f8 | 100 | bool validated; |
859fc7c0 | 101 | u16 chain_imp; |
c1ab3f1d | 102 | u16 ackers; |
859fc7c0 YX |
103 | }; |
104 | ||
105 | #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0])) | |
106 | ||
d265fef6 AS |
107 | struct tipc_msg { |
108 | __be32 hdr[15]; | |
109 | }; | |
c4307285 | 110 | |
859fc7c0 YX |
111 | static inline struct tipc_msg *buf_msg(struct sk_buff *skb) |
112 | { | |
113 | return (struct tipc_msg *)skb->data; | |
114 | } | |
115 | ||
d265fef6 AS |
116 | static inline u32 msg_word(struct tipc_msg *m, u32 pos) |
117 | { | |
118 | return ntohl(m->hdr[pos]); | |
119 | } | |
b97bf3fd PL |
120 | |
121 | static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) | |
122 | { | |
123 | m->hdr[w] = htonl(val); | |
124 | } | |
125 | ||
d265fef6 AS |
126 | static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask) |
127 | { | |
128 | return (msg_word(m, w) >> pos) & mask; | |
129 | } | |
130 | ||
b97bf3fd PL |
131 | static inline void msg_set_bits(struct tipc_msg *m, u32 w, |
132 | u32 pos, u32 mask, u32 val) | |
133 | { | |
1f9eda7e | 134 | val = (val & mask) << pos; |
becf3da2 AV |
135 | mask = mask << pos; |
136 | m->hdr[w] &= ~htonl(mask); | |
137 | m->hdr[w] |= htonl(val); | |
b97bf3fd PL |
138 | } |
139 | ||
40aecb1b AS |
140 | static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b) |
141 | { | |
142 | u32 temp = msg->hdr[a]; | |
143 | ||
144 | msg->hdr[a] = msg->hdr[b]; | |
145 | msg->hdr[b] = temp; | |
146 | } | |
147 | ||
c4307285 | 148 | /* |
b97bf3fd PL |
149 | * Word 0 |
150 | */ | |
b97bf3fd PL |
151 | static inline u32 msg_version(struct tipc_msg *m) |
152 | { | |
153 | return msg_bits(m, 0, 29, 7); | |
154 | } | |
155 | ||
c4307285 | 156 | static inline void msg_set_version(struct tipc_msg *m) |
b97bf3fd | 157 | { |
37695420 | 158 | msg_set_bits(m, 0, 29, 7, TIPC_VERSION); |
b97bf3fd PL |
159 | } |
160 | ||
161 | static inline u32 msg_user(struct tipc_msg *m) | |
162 | { | |
163 | return msg_bits(m, 0, 25, 0xf); | |
164 | } | |
165 | ||
166 | static inline u32 msg_isdata(struct tipc_msg *m) | |
167 | { | |
a02cec21 | 168 | return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE; |
b97bf3fd PL |
169 | } |
170 | ||
c4307285 | 171 | static inline void msg_set_user(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
172 | { |
173 | msg_set_bits(m, 0, 25, 0xf, n); | |
174 | } | |
175 | ||
d265fef6 AS |
176 | static inline u32 msg_hdr_sz(struct tipc_msg *m) |
177 | { | |
178 | return msg_bits(m, 0, 21, 0xf) << 2; | |
179 | } | |
180 | ||
0e65967e | 181 | static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
182 | { |
183 | msg_set_bits(m, 0, 21, 0xf, n>>2); | |
184 | } | |
185 | ||
d265fef6 AS |
186 | static inline u32 msg_size(struct tipc_msg *m) |
187 | { | |
188 | return msg_bits(m, 0, 0, 0x1ffff); | |
189 | } | |
190 | ||
191 | static inline u32 msg_data_sz(struct tipc_msg *m) | |
192 | { | |
193 | return msg_size(m) - msg_hdr_sz(m); | |
194 | } | |
195 | ||
c4307285 | 196 | static inline int msg_non_seq(struct tipc_msg *m) |
b97bf3fd PL |
197 | { |
198 | return msg_bits(m, 0, 20, 1); | |
199 | } | |
200 | ||
40aecb1b | 201 | static inline void msg_set_non_seq(struct tipc_msg *m, u32 n) |
b97bf3fd | 202 | { |
40aecb1b | 203 | msg_set_bits(m, 0, 20, 1, n); |
b97bf3fd PL |
204 | } |
205 | ||
c4307285 | 206 | static inline int msg_dest_droppable(struct tipc_msg *m) |
b97bf3fd PL |
207 | { |
208 | return msg_bits(m, 0, 19, 1); | |
209 | } | |
210 | ||
c4307285 | 211 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
212 | { |
213 | msg_set_bits(m, 0, 19, 1, d); | |
214 | } | |
215 | ||
c4307285 | 216 | static inline int msg_src_droppable(struct tipc_msg *m) |
b97bf3fd PL |
217 | { |
218 | return msg_bits(m, 0, 18, 1); | |
219 | } | |
220 | ||
c4307285 | 221 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
222 | { |
223 | msg_set_bits(m, 0, 18, 1, d); | |
224 | } | |
225 | ||
226 | static inline void msg_set_size(struct tipc_msg *m, u32 sz) | |
227 | { | |
228 | m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); | |
229 | } | |
230 | ||
3127a020 JPM |
231 | static inline unchar *msg_data(struct tipc_msg *m) |
232 | { | |
233 | return ((unchar *)m) + msg_hdr_sz(m); | |
234 | } | |
235 | ||
236 | static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m) | |
237 | { | |
238 | return (struct tipc_msg *)msg_data(m); | |
239 | } | |
b97bf3fd | 240 | |
c4307285 | 241 | /* |
b97bf3fd PL |
242 | * Word 1 |
243 | */ | |
d265fef6 AS |
244 | static inline u32 msg_type(struct tipc_msg *m) |
245 | { | |
246 | return msg_bits(m, 1, 29, 0x7); | |
247 | } | |
248 | ||
c4307285 | 249 | static inline void msg_set_type(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
250 | { |
251 | msg_set_bits(m, 1, 29, 0x7, n); | |
252 | } | |
253 | ||
d265fef6 AS |
254 | static inline u32 msg_named(struct tipc_msg *m) |
255 | { | |
256 | return msg_type(m) == TIPC_NAMED_MSG; | |
257 | } | |
258 | ||
259 | static inline u32 msg_mcast(struct tipc_msg *m) | |
260 | { | |
261 | return msg_type(m) == TIPC_MCAST_MSG; | |
262 | } | |
263 | ||
264 | static inline u32 msg_connected(struct tipc_msg *m) | |
265 | { | |
266 | return msg_type(m) == TIPC_CONN_MSG; | |
267 | } | |
268 | ||
269 | static inline u32 msg_errcode(struct tipc_msg *m) | |
270 | { | |
271 | return msg_bits(m, 1, 25, 0xf); | |
272 | } | |
273 | ||
c4307285 | 274 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
b97bf3fd PL |
275 | { |
276 | msg_set_bits(m, 1, 25, 0xf, err); | |
277 | } | |
278 | ||
c4307285 | 279 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
280 | { |
281 | return msg_bits(m, 1, 21, 0xf); | |
282 | } | |
283 | ||
c4307285 | 284 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
285 | { |
286 | msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); | |
287 | } | |
288 | ||
c4307285 | 289 | static inline void msg_reset_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
290 | { |
291 | msg_set_bits(m, 1, 21, 0xf, 0); | |
292 | } | |
293 | ||
294 | static inline u32 msg_lookup_scope(struct tipc_msg *m) | |
295 | { | |
296 | return msg_bits(m, 1, 19, 0x3); | |
297 | } | |
298 | ||
c4307285 | 299 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
300 | { |
301 | msg_set_bits(m, 1, 19, 0x3, n); | |
302 | } | |
303 | ||
e4bf4f76 | 304 | static inline u16 msg_bcast_ack(struct tipc_msg *m) |
b97bf3fd PL |
305 | { |
306 | return msg_bits(m, 1, 0, 0xffff); | |
307 | } | |
308 | ||
e4bf4f76 | 309 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
310 | { |
311 | msg_set_bits(m, 1, 0, 0xffff, n); | |
312 | } | |
313 | ||
314 | ||
c4307285 | 315 | /* |
b97bf3fd PL |
316 | * Word 2 |
317 | */ | |
e4bf4f76 | 318 | static inline u16 msg_ack(struct tipc_msg *m) |
b97bf3fd PL |
319 | { |
320 | return msg_bits(m, 2, 16, 0xffff); | |
321 | } | |
322 | ||
e4bf4f76 | 323 | static inline void msg_set_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
324 | { |
325 | msg_set_bits(m, 2, 16, 0xffff, n); | |
326 | } | |
327 | ||
e4bf4f76 | 328 | static inline u16 msg_seqno(struct tipc_msg *m) |
b97bf3fd PL |
329 | { |
330 | return msg_bits(m, 2, 0, 0xffff); | |
331 | } | |
332 | ||
e4bf4f76 | 333 | static inline void msg_set_seqno(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
334 | { |
335 | msg_set_bits(m, 2, 0, 0xffff, n); | |
336 | } | |
337 | ||
c4307285 | 338 | /* |
b97bf3fd PL |
339 | * Words 3-10 |
340 | */ | |
e3eea1eb JPM |
341 | static inline u32 msg_importance(struct tipc_msg *m) |
342 | { | |
f21e897e JPM |
343 | int usr = msg_user(m); |
344 | ||
345 | if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m))) | |
346 | return usr; | |
347 | if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)) | |
dde4b5ae | 348 | return msg_bits(m, 9, 0, 0x7); |
e3eea1eb JPM |
349 | return TIPC_SYSTEM_IMPORTANCE; |
350 | } | |
351 | ||
352 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) | |
353 | { | |
f21e897e JPM |
354 | int usr = msg_user(m); |
355 | ||
356 | if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))) | |
dde4b5ae | 357 | msg_set_bits(m, 9, 0, 0x7, i); |
f21e897e | 358 | else if (i < TIPC_SYSTEM_IMPORTANCE) |
e3eea1eb JPM |
359 | msg_set_user(m, i); |
360 | else | |
361 | pr_warn("Trying to set illegal importance in message\n"); | |
362 | } | |
363 | ||
d265fef6 AS |
364 | static inline u32 msg_prevnode(struct tipc_msg *m) |
365 | { | |
366 | return msg_word(m, 3); | |
367 | } | |
368 | ||
c4307285 | 369 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
370 | { |
371 | msg_set_word(m, 3, a); | |
372 | } | |
373 | ||
d265fef6 AS |
374 | static inline u32 msg_origport(struct tipc_msg *m) |
375 | { | |
3127a020 JPM |
376 | if (msg_user(m) == MSG_FRAGMENTER) |
377 | m = msg_get_wrapped(m); | |
d265fef6 AS |
378 | return msg_word(m, 4); |
379 | } | |
380 | ||
c4307285 | 381 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
382 | { |
383 | msg_set_word(m, 4, p); | |
384 | } | |
385 | ||
d265fef6 AS |
386 | static inline u32 msg_destport(struct tipc_msg *m) |
387 | { | |
388 | return msg_word(m, 5); | |
389 | } | |
390 | ||
c4307285 | 391 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
392 | { |
393 | msg_set_word(m, 5, p); | |
394 | } | |
395 | ||
d265fef6 AS |
396 | static inline u32 msg_mc_netid(struct tipc_msg *m) |
397 | { | |
398 | return msg_word(m, 5); | |
399 | } | |
400 | ||
c4307285 | 401 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
402 | { |
403 | msg_set_word(m, 5, p); | |
404 | } | |
405 | ||
d265fef6 AS |
406 | static inline int msg_short(struct tipc_msg *m) |
407 | { | |
741d9eb7 | 408 | return msg_hdr_sz(m) == SHORT_H_SIZE; |
d265fef6 AS |
409 | } |
410 | ||
411 | static inline u32 msg_orignode(struct tipc_msg *m) | |
412 | { | |
413 | if (likely(msg_short(m))) | |
414 | return msg_prevnode(m); | |
415 | return msg_word(m, 6); | |
416 | } | |
417 | ||
c4307285 | 418 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
419 | { |
420 | msg_set_word(m, 6, a); | |
421 | } | |
422 | ||
d265fef6 AS |
423 | static inline u32 msg_destnode(struct tipc_msg *m) |
424 | { | |
425 | return msg_word(m, 7); | |
426 | } | |
427 | ||
c4307285 | 428 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
429 | { |
430 | msg_set_word(m, 7, a); | |
431 | } | |
432 | ||
d265fef6 AS |
433 | static inline u32 msg_nametype(struct tipc_msg *m) |
434 | { | |
435 | return msg_word(m, 8); | |
436 | } | |
437 | ||
c4307285 | 438 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
439 | { |
440 | msg_set_word(m, 8, n); | |
441 | } | |
442 | ||
d265fef6 AS |
443 | static inline u32 msg_nameinst(struct tipc_msg *m) |
444 | { | |
445 | return msg_word(m, 9); | |
446 | } | |
447 | ||
448 | static inline u32 msg_namelower(struct tipc_msg *m) | |
449 | { | |
450 | return msg_nameinst(m); | |
451 | } | |
452 | ||
c4307285 | 453 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
454 | { |
455 | msg_set_word(m, 9, n); | |
456 | } | |
457 | ||
c4307285 | 458 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
459 | { |
460 | msg_set_namelower(m, n); | |
461 | } | |
462 | ||
d265fef6 AS |
463 | static inline u32 msg_nameupper(struct tipc_msg *m) |
464 | { | |
465 | return msg_word(m, 10); | |
466 | } | |
467 | ||
c4307285 | 468 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
469 | { |
470 | msg_set_word(m, 10, n); | |
471 | } | |
472 | ||
b97bf3fd | 473 | /* |
cc4c4353 AS |
474 | * Constants and routines used to read and write TIPC internal message headers |
475 | */ | |
b97bf3fd | 476 | |
c4307285 | 477 | /* |
cc4c4353 | 478 | * Connection management protocol message types |
b97bf3fd | 479 | */ |
b97bf3fd PL |
480 | #define CONN_PROBE 0 |
481 | #define CONN_PROBE_REPLY 1 | |
482 | #define CONN_ACK 2 | |
483 | ||
c4307285 | 484 | /* |
cc4c4353 | 485 | * Name distributor message types |
b97bf3fd | 486 | */ |
b97bf3fd PL |
487 | #define PUBLICATION 0 |
488 | #define WITHDRAWAL 1 | |
489 | ||
92138d1f AS |
490 | /* |
491 | * Segmentation message types | |
492 | */ | |
92138d1f AS |
493 | #define FIRST_FRAGMENT 0 |
494 | #define FRAGMENT 1 | |
495 | #define LAST_FRAGMENT 2 | |
496 | ||
497 | /* | |
498 | * Link management protocol message types | |
499 | */ | |
92138d1f AS |
500 | #define STATE_MSG 0 |
501 | #define RESET_MSG 1 | |
502 | #define ACTIVATE_MSG 2 | |
503 | ||
504 | /* | |
505 | * Changeover tunnel message types | |
506 | */ | |
dff29b1a JPM |
507 | #define SYNCH_MSG 0 |
508 | #define FAILOVER_MSG 1 | |
92138d1f AS |
509 | |
510 | /* | |
511 | * Config protocol message types | |
512 | */ | |
92138d1f AS |
513 | #define DSC_REQ_MSG 0 |
514 | #define DSC_RESP_MSG 1 | |
515 | ||
c4307285 | 516 | /* |
b97bf3fd PL |
517 | * Word 1 |
518 | */ | |
b97bf3fd PL |
519 | static inline u32 msg_seq_gap(struct tipc_msg *m) |
520 | { | |
bd784533 | 521 | return msg_bits(m, 1, 16, 0x1fff); |
b97bf3fd PL |
522 | } |
523 | ||
524 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) | |
525 | { | |
bd784533 | 526 | msg_set_bits(m, 1, 16, 0x1fff, n); |
b97bf3fd PL |
527 | } |
528 | ||
fc0eea69 AS |
529 | static inline u32 msg_node_sig(struct tipc_msg *m) |
530 | { | |
531 | return msg_bits(m, 1, 0, 0xffff); | |
532 | } | |
533 | ||
534 | static inline void msg_set_node_sig(struct tipc_msg *m, u32 n) | |
535 | { | |
536 | msg_set_bits(m, 1, 0, 0xffff, n); | |
537 | } | |
538 | ||
7764d6e8 JPM |
539 | static inline u32 msg_node_capabilities(struct tipc_msg *m) |
540 | { | |
541 | return msg_bits(m, 1, 15, 0x1fff); | |
542 | } | |
543 | ||
544 | static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n) | |
545 | { | |
546 | msg_set_bits(m, 1, 15, 0x1fff, n); | |
547 | } | |
548 | ||
c4307285 | 549 | /* |
b97bf3fd PL |
550 | * Word 2 |
551 | */ | |
b97bf3fd PL |
552 | static inline u32 msg_dest_domain(struct tipc_msg *m) |
553 | { | |
554 | return msg_word(m, 2); | |
555 | } | |
556 | ||
c4307285 | 557 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
558 | { |
559 | msg_set_word(m, 2, n); | |
560 | } | |
561 | ||
562 | static inline u32 msg_bcgap_after(struct tipc_msg *m) | |
563 | { | |
564 | return msg_bits(m, 2, 16, 0xffff); | |
565 | } | |
566 | ||
567 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) | |
568 | { | |
569 | msg_set_bits(m, 2, 16, 0xffff, n); | |
570 | } | |
571 | ||
572 | static inline u32 msg_bcgap_to(struct tipc_msg *m) | |
573 | { | |
574 | return msg_bits(m, 2, 0, 0xffff); | |
575 | } | |
576 | ||
c4307285 | 577 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
578 | { |
579 | msg_set_bits(m, 2, 0, 0xffff, n); | |
580 | } | |
581 | ||
582 | ||
c4307285 | 583 | /* |
b97bf3fd PL |
584 | * Word 4 |
585 | */ | |
b97bf3fd PL |
586 | static inline u32 msg_last_bcast(struct tipc_msg *m) |
587 | { | |
588 | return msg_bits(m, 4, 16, 0xffff); | |
589 | } | |
590 | ||
52666986 JPM |
591 | static inline u32 msg_bc_snd_nxt(struct tipc_msg *m) |
592 | { | |
593 | return msg_last_bcast(m) + 1; | |
594 | } | |
595 | ||
b97bf3fd PL |
596 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) |
597 | { | |
598 | msg_set_bits(m, 4, 16, 0xffff, n); | |
599 | } | |
600 | ||
b97bf3fd PL |
601 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) |
602 | { | |
603 | msg_set_bits(m, 4, 16, 0xffff, n); | |
604 | } | |
605 | ||
606 | ||
6e498158 | 607 | static inline u16 msg_next_sent(struct tipc_msg *m) |
b97bf3fd PL |
608 | { |
609 | return msg_bits(m, 4, 0, 0xffff); | |
610 | } | |
611 | ||
6e498158 | 612 | static inline void msg_set_next_sent(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
613 | { |
614 | msg_set_bits(m, 4, 0, 0xffff, n); | |
615 | } | |
616 | ||
b97bf3fd PL |
617 | static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) |
618 | { | |
619 | msg_set_bits(m, 4, 0, 0xffff, n); | |
620 | } | |
621 | ||
622 | static inline u32 msg_bc_netid(struct tipc_msg *m) | |
623 | { | |
624 | return msg_word(m, 4); | |
625 | } | |
626 | ||
627 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) | |
628 | { | |
629 | msg_set_word(m, 4, id); | |
630 | } | |
631 | ||
632 | static inline u32 msg_link_selector(struct tipc_msg *m) | |
633 | { | |
a853e4c6 JPM |
634 | if (msg_user(m) == MSG_FRAGMENTER) |
635 | m = (void *)msg_data(m); | |
b97bf3fd PL |
636 | return msg_bits(m, 4, 0, 1); |
637 | } | |
638 | ||
c4307285 | 639 | /* |
b97bf3fd PL |
640 | * Word 5 |
641 | */ | |
d999297c | 642 | static inline u16 msg_session(struct tipc_msg *m) |
b97bf3fd PL |
643 | { |
644 | return msg_bits(m, 5, 16, 0xffff); | |
645 | } | |
646 | ||
d999297c | 647 | static inline void msg_set_session(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
648 | { |
649 | msg_set_bits(m, 5, 16, 0xffff, n); | |
650 | } | |
651 | ||
652 | static inline u32 msg_probe(struct tipc_msg *m) | |
653 | { | |
654 | return msg_bits(m, 5, 0, 1); | |
655 | } | |
656 | ||
657 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) | |
658 | { | |
7eb878ed | 659 | msg_set_bits(m, 5, 0, 1, val); |
b97bf3fd PL |
660 | } |
661 | ||
662 | static inline char msg_net_plane(struct tipc_msg *m) | |
663 | { | |
664 | return msg_bits(m, 5, 1, 7) + 'A'; | |
665 | } | |
666 | ||
667 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) | |
668 | { | |
669 | msg_set_bits(m, 5, 1, 7, (n - 'A')); | |
670 | } | |
671 | ||
672 | static inline u32 msg_linkprio(struct tipc_msg *m) | |
673 | { | |
674 | return msg_bits(m, 5, 4, 0x1f); | |
675 | } | |
676 | ||
677 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) | |
678 | { | |
679 | msg_set_bits(m, 5, 4, 0x1f, n); | |
680 | } | |
681 | ||
682 | static inline u32 msg_bearer_id(struct tipc_msg *m) | |
683 | { | |
684 | return msg_bits(m, 5, 9, 0x7); | |
685 | } | |
686 | ||
687 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) | |
688 | { | |
689 | msg_set_bits(m, 5, 9, 0x7, n); | |
690 | } | |
691 | ||
692 | static inline u32 msg_redundant_link(struct tipc_msg *m) | |
693 | { | |
694 | return msg_bits(m, 5, 12, 0x1); | |
695 | } | |
696 | ||
77f167fc | 697 | static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r) |
b97bf3fd | 698 | { |
77f167fc | 699 | msg_set_bits(m, 5, 12, 0x1, r); |
b97bf3fd PL |
700 | } |
701 | ||
634696b1 JPM |
702 | static inline u32 msg_peer_stopping(struct tipc_msg *m) |
703 | { | |
704 | return msg_bits(m, 5, 13, 0x1); | |
705 | } | |
706 | ||
707 | static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s) | |
708 | { | |
709 | msg_set_bits(m, 5, 13, 0x1, s); | |
710 | } | |
711 | ||
06bd2b1e JPM |
712 | static inline bool msg_bc_ack_invalid(struct tipc_msg *m) |
713 | { | |
714 | switch (msg_user(m)) { | |
715 | case BCAST_PROTOCOL: | |
716 | case NAME_DISTRIBUTOR: | |
717 | case LINK_PROTOCOL: | |
718 | return msg_bits(m, 5, 14, 0x1); | |
719 | default: | |
720 | return false; | |
721 | } | |
722 | } | |
723 | ||
724 | static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid) | |
725 | { | |
726 | msg_set_bits(m, 5, 14, 0x1, invalid); | |
727 | } | |
728 | ||
3d749a6a AS |
729 | static inline char *msg_media_addr(struct tipc_msg *m) |
730 | { | |
91e2eb56 | 731 | return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET]; |
3d749a6a | 732 | } |
b97bf3fd | 733 | |
02d11ca2 JPM |
734 | static inline u32 msg_bc_gap(struct tipc_msg *m) |
735 | { | |
736 | return msg_bits(m, 8, 0, 0x3ff); | |
737 | } | |
738 | ||
739 | static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n) | |
740 | { | |
741 | msg_set_bits(m, 8, 0, 0x3ff, n); | |
742 | } | |
743 | ||
c4307285 | 744 | /* |
b97bf3fd PL |
745 | * Word 9 |
746 | */ | |
6e498158 | 747 | static inline u16 msg_msgcnt(struct tipc_msg *m) |
b97bf3fd PL |
748 | { |
749 | return msg_bits(m, 9, 16, 0xffff); | |
750 | } | |
751 | ||
6e498158 | 752 | static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
753 | { |
754 | msg_set_bits(m, 9, 16, 0xffff, n); | |
755 | } | |
756 | ||
10724cc7 | 757 | static inline u32 msg_conn_ack(struct tipc_msg *m) |
b97bf3fd PL |
758 | { |
759 | return msg_bits(m, 9, 16, 0xffff); | |
760 | } | |
761 | ||
10724cc7 | 762 | static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
763 | { |
764 | msg_set_bits(m, 9, 16, 0xffff, n); | |
765 | } | |
766 | ||
10724cc7 JPM |
767 | static inline u32 msg_adv_win(struct tipc_msg *m) |
768 | { | |
769 | return msg_bits(m, 9, 0, 0xffff); | |
770 | } | |
771 | ||
772 | static inline void msg_set_adv_win(struct tipc_msg *m, u32 n) | |
773 | { | |
774 | msg_set_bits(m, 9, 0, 0xffff, n); | |
775 | } | |
776 | ||
c4307285 | 777 | static inline u32 msg_max_pkt(struct tipc_msg *m) |
b97bf3fd | 778 | { |
a02cec21 | 779 | return msg_bits(m, 9, 16, 0xffff) * 4; |
b97bf3fd PL |
780 | } |
781 | ||
c4307285 | 782 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
783 | { |
784 | msg_set_bits(m, 9, 16, 0xffff, (n / 4)); | |
785 | } | |
786 | ||
787 | static inline u32 msg_link_tolerance(struct tipc_msg *m) | |
788 | { | |
789 | return msg_bits(m, 9, 0, 0xffff); | |
790 | } | |
791 | ||
792 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) | |
793 | { | |
794 | msg_set_bits(m, 9, 0, 0xffff, n); | |
795 | } | |
796 | ||
6e498158 | 797 | static inline bool msg_peer_link_is_up(struct tipc_msg *m) |
1a20cc25 | 798 | { |
d999297c | 799 | if (likely(msg_user(m) != LINK_PROTOCOL)) |
1a20cc25 | 800 | return true; |
6e498158 JPM |
801 | if (msg_type(m) == STATE_MSG) |
802 | return true; | |
803 | return false; | |
d999297c JPM |
804 | } |
805 | ||
6e498158 | 806 | static inline bool msg_peer_node_is_up(struct tipc_msg *m) |
d999297c | 807 | { |
6e498158 JPM |
808 | if (msg_peer_link_is_up(m)) |
809 | return true; | |
1a20cc25 JPM |
810 | return msg_redundant_link(m); |
811 | } | |
812 | ||
5b7066c3 JPM |
813 | static inline bool msg_is_reset(struct tipc_msg *hdr) |
814 | { | |
815 | return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG); | |
816 | } | |
817 | ||
57d5f64d | 818 | struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp); |
cf2157f8 | 819 | bool tipc_msg_validate(struct sk_buff *skb); |
bcd3ffd4 | 820 | bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err); |
c5898636 | 821 | void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type, |
34747539 | 822 | u32 hsize, u32 destnode); |
e3a77561 JPM |
823 | struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, |
824 | uint data_sz, u32 dnode, u32 onode, | |
825 | u32 dport, u32 oport, int errcode); | |
37e22164 | 826 | int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf); |
dd3f9e70 JPM |
827 | bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu); |
828 | bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg, | |
829 | u32 mtu, u32 dnode); | |
c637c103 | 830 | bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos); |
c5898636 | 831 | int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, |
34747539 | 832 | int offset, int dsz, int mtu, struct sk_buff_head *list); |
cda3696d | 833 | bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err); |
2f566124 | 834 | bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq); |
a853e4c6 JPM |
835 | bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg, |
836 | struct sk_buff_head *cpy); | |
8306f99a JPM |
837 | void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno, |
838 | struct sk_buff *skb); | |
078bec82 | 839 | |
e4bf4f76 JPM |
840 | static inline u16 buf_seqno(struct sk_buff *skb) |
841 | { | |
842 | return msg_seqno(buf_msg(skb)); | |
843 | } | |
844 | ||
cb1b7280 JPM |
845 | /* tipc_skb_peek(): peek and reserve first buffer in list |
846 | * @list: list to be peeked in | |
847 | * Returns pointer to first buffer in list, if any | |
848 | */ | |
849 | static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list, | |
850 | spinlock_t *lock) | |
851 | { | |
852 | struct sk_buff *skb; | |
853 | ||
854 | spin_lock_bh(lock); | |
855 | skb = skb_peek(list); | |
856 | if (skb) | |
857 | skb_get(skb); | |
858 | spin_unlock_bh(lock); | |
859 | return skb; | |
860 | } | |
861 | ||
c637c103 JPM |
862 | /* tipc_skb_peek_port(): find a destination port, ignoring all destinations |
863 | * up to and including 'filter'. | |
864 | * Note: ignoring previously tried destinations minimizes the risk of | |
865 | * contention on the socket lock | |
866 | * @list: list to be peeked in | |
867 | * @filter: last destination to be ignored from search | |
868 | * Returns a destination port number, of applicable. | |
869 | */ | |
870 | static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter) | |
871 | { | |
872 | struct sk_buff *skb; | |
873 | u32 dport = 0; | |
874 | bool ignore = true; | |
875 | ||
876 | spin_lock_bh(&list->lock); | |
877 | skb_queue_walk(list, skb) { | |
878 | dport = msg_destport(buf_msg(skb)); | |
879 | if (!filter || skb_queue_is_last(list, skb)) | |
880 | break; | |
881 | if (dport == filter) | |
882 | ignore = false; | |
883 | else if (!ignore) | |
884 | break; | |
885 | } | |
886 | spin_unlock_bh(&list->lock); | |
887 | return dport; | |
888 | } | |
889 | ||
890 | /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list | |
891 | * @list: list to be unlinked from | |
892 | * @dport: selection criteria for buffer to unlink | |
893 | */ | |
894 | static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list, | |
895 | u32 dport) | |
896 | { | |
897 | struct sk_buff *_skb, *tmp, *skb = NULL; | |
898 | ||
899 | spin_lock_bh(&list->lock); | |
900 | skb_queue_walk_safe(list, _skb, tmp) { | |
901 | if (msg_destport(buf_msg(_skb)) == dport) { | |
902 | __skb_unlink(_skb, list); | |
903 | skb = _skb; | |
904 | break; | |
905 | } | |
906 | } | |
907 | spin_unlock_bh(&list->lock); | |
908 | return skb; | |
909 | } | |
910 | ||
598411d7 JPM |
911 | /* tipc_skb_queue_splice_tail - append an skb list to lock protected list |
912 | * @list: the new list to append. Not lock protected | |
913 | * @head: target list. Lock protected. | |
914 | */ | |
915 | static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list, | |
916 | struct sk_buff_head *head) | |
917 | { | |
918 | spin_lock_bh(&head->lock); | |
919 | skb_queue_splice_tail(list, head); | |
920 | spin_unlock_bh(&head->lock); | |
921 | } | |
922 | ||
923 | /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists | |
924 | * @list: the new list to add. Lock protected. Will be reinitialized | |
925 | * @head: target list. Lock protected. | |
926 | */ | |
927 | static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list, | |
928 | struct sk_buff_head *head) | |
929 | { | |
930 | struct sk_buff_head tmp; | |
931 | ||
932 | __skb_queue_head_init(&tmp); | |
933 | ||
934 | spin_lock_bh(&list->lock); | |
935 | skb_queue_splice_tail_init(list, &tmp); | |
936 | spin_unlock_bh(&list->lock); | |
937 | tipc_skb_queue_splice_tail(&tmp, head); | |
938 | } | |
939 | ||
b97bf3fd | 940 | #endif |