Commit | Line | Data |
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b97bf3fd PL |
1 | /* |
2 | * net/tipc/msg.h: Include file for TIPC message header routines | |
c4307285 | 3 | * |
1f9eda7e AS |
4 | * Copyright (c) 2000-2007, Ericsson AB |
5 | * Copyright (c) 2005-2007, 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 | ||
5f7c3ff6 | 40 | #include "core.h" |
b97bf3fd PL |
41 | |
42 | #define TIPC_VERSION 2 | |
43 | #define DATA_LOW TIPC_LOW_IMPORTANCE | |
44 | #define DATA_MEDIUM TIPC_MEDIUM_IMPORTANCE | |
45 | #define DATA_HIGH TIPC_HIGH_IMPORTANCE | |
46 | #define DATA_CRITICAL TIPC_CRITICAL_IMPORTANCE | |
47 | #define SHORT_H_SIZE 24 /* Connected,in cluster */ | |
48 | #define DIR_MSG_H_SIZE 32 /* Directly addressed messages */ | |
49 | #define CONN_MSG_H_SIZE 36 /* Routed connected msgs*/ | |
50 | #define LONG_H_SIZE 40 /* Named Messages */ | |
51 | #define MCAST_H_SIZE 44 /* Multicast messages */ | |
52 | #define MAX_H_SIZE 60 /* Inclusive full options */ | |
53 | #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) | |
54 | #define LINK_CONFIG 13 | |
55 | ||
56 | ||
57 | /* | |
58 | TIPC user data message header format, version 2 | |
c4307285 | 59 | |
b97bf3fd PL |
60 | - Fundamental definitions available to privileged TIPC users |
61 | are located in tipc_msg.h. | |
c4307285 | 62 | - Remaining definitions available to TIPC internal users appear below. |
b97bf3fd PL |
63 | */ |
64 | ||
65 | ||
66 | static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) | |
67 | { | |
68 | m->hdr[w] = htonl(val); | |
69 | } | |
70 | ||
71 | static inline void msg_set_bits(struct tipc_msg *m, u32 w, | |
72 | u32 pos, u32 mask, u32 val) | |
73 | { | |
1f9eda7e | 74 | val = (val & mask) << pos; |
582ee43d AV |
75 | m->hdr[w] &= ~htonl(mask << pos); |
76 | m->hdr[w] |= htonl(val); | |
b97bf3fd PL |
77 | } |
78 | ||
c4307285 | 79 | /* |
b97bf3fd PL |
80 | * Word 0 |
81 | */ | |
82 | ||
83 | static inline u32 msg_version(struct tipc_msg *m) | |
84 | { | |
85 | return msg_bits(m, 0, 29, 7); | |
86 | } | |
87 | ||
c4307285 | 88 | static inline void msg_set_version(struct tipc_msg *m) |
b97bf3fd PL |
89 | { |
90 | msg_set_bits(m, 0, 29, 0xf, TIPC_VERSION); | |
91 | } | |
92 | ||
93 | static inline u32 msg_user(struct tipc_msg *m) | |
94 | { | |
95 | return msg_bits(m, 0, 25, 0xf); | |
96 | } | |
97 | ||
98 | static inline u32 msg_isdata(struct tipc_msg *m) | |
99 | { | |
100 | return (msg_user(m) <= DATA_CRITICAL); | |
101 | } | |
102 | ||
c4307285 | 103 | static inline void msg_set_user(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
104 | { |
105 | msg_set_bits(m, 0, 25, 0xf, n); | |
106 | } | |
107 | ||
c4307285 | 108 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) |
b97bf3fd PL |
109 | { |
110 | msg_set_user(m, i); | |
111 | } | |
112 | ||
c4307285 | 113 | static inline void msg_set_hdr_sz(struct tipc_msg *m,u32 n) |
b97bf3fd PL |
114 | { |
115 | msg_set_bits(m, 0, 21, 0xf, n>>2); | |
116 | } | |
117 | ||
c4307285 | 118 | static inline int msg_non_seq(struct tipc_msg *m) |
b97bf3fd PL |
119 | { |
120 | return msg_bits(m, 0, 20, 1); | |
121 | } | |
122 | ||
c4307285 | 123 | static inline void msg_set_non_seq(struct tipc_msg *m) |
b97bf3fd PL |
124 | { |
125 | msg_set_bits(m, 0, 20, 1, 1); | |
126 | } | |
127 | ||
c4307285 | 128 | static inline int msg_dest_droppable(struct tipc_msg *m) |
b97bf3fd PL |
129 | { |
130 | return msg_bits(m, 0, 19, 1); | |
131 | } | |
132 | ||
c4307285 | 133 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
134 | { |
135 | msg_set_bits(m, 0, 19, 1, d); | |
136 | } | |
137 | ||
c4307285 | 138 | static inline int msg_src_droppable(struct tipc_msg *m) |
b97bf3fd PL |
139 | { |
140 | return msg_bits(m, 0, 18, 1); | |
141 | } | |
142 | ||
c4307285 | 143 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
144 | { |
145 | msg_set_bits(m, 0, 18, 1, d); | |
146 | } | |
147 | ||
148 | static inline void msg_set_size(struct tipc_msg *m, u32 sz) | |
149 | { | |
150 | m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); | |
151 | } | |
152 | ||
153 | ||
c4307285 | 154 | /* |
b97bf3fd PL |
155 | * Word 1 |
156 | */ | |
157 | ||
c4307285 | 158 | static inline void msg_set_type(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
159 | { |
160 | msg_set_bits(m, 1, 29, 0x7, n); | |
161 | } | |
162 | ||
c4307285 | 163 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
b97bf3fd PL |
164 | { |
165 | msg_set_bits(m, 1, 25, 0xf, err); | |
166 | } | |
167 | ||
c4307285 | 168 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
169 | { |
170 | return msg_bits(m, 1, 21, 0xf); | |
171 | } | |
172 | ||
c4307285 | 173 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
174 | { |
175 | msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); | |
176 | } | |
177 | ||
c4307285 | 178 | static inline void msg_reset_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
179 | { |
180 | msg_set_bits(m, 1, 21, 0xf, 0); | |
181 | } | |
182 | ||
183 | static inline u32 msg_lookup_scope(struct tipc_msg *m) | |
184 | { | |
185 | return msg_bits(m, 1, 19, 0x3); | |
186 | } | |
187 | ||
c4307285 | 188 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
189 | { |
190 | msg_set_bits(m, 1, 19, 0x3, n); | |
191 | } | |
192 | ||
b97bf3fd PL |
193 | static inline u32 msg_bcast_ack(struct tipc_msg *m) |
194 | { | |
195 | return msg_bits(m, 1, 0, 0xffff); | |
196 | } | |
197 | ||
c4307285 | 198 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
199 | { |
200 | msg_set_bits(m, 1, 0, 0xffff, n); | |
201 | } | |
202 | ||
203 | ||
c4307285 | 204 | /* |
b97bf3fd PL |
205 | * Word 2 |
206 | */ | |
207 | ||
208 | static inline u32 msg_ack(struct tipc_msg *m) | |
209 | { | |
210 | return msg_bits(m, 2, 16, 0xffff); | |
211 | } | |
212 | ||
c4307285 | 213 | static inline void msg_set_ack(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
214 | { |
215 | msg_set_bits(m, 2, 16, 0xffff, n); | |
216 | } | |
217 | ||
218 | static inline u32 msg_seqno(struct tipc_msg *m) | |
219 | { | |
220 | return msg_bits(m, 2, 0, 0xffff); | |
221 | } | |
222 | ||
c4307285 | 223 | static inline void msg_set_seqno(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
224 | { |
225 | msg_set_bits(m, 2, 0, 0xffff, n); | |
226 | } | |
227 | ||
228 | ||
c4307285 | 229 | /* |
b97bf3fd PL |
230 | * Words 3-10 |
231 | */ | |
232 | ||
233 | ||
c4307285 | 234 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
235 | { |
236 | msg_set_word(m, 3, a); | |
237 | } | |
238 | ||
c4307285 | 239 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
240 | { |
241 | msg_set_word(m, 4, p); | |
242 | } | |
243 | ||
c4307285 | 244 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
245 | { |
246 | msg_set_word(m, 5, p); | |
247 | } | |
248 | ||
c4307285 | 249 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
250 | { |
251 | msg_set_word(m, 5, p); | |
252 | } | |
253 | ||
c4307285 | 254 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
255 | { |
256 | msg_set_word(m, 6, a); | |
257 | } | |
258 | ||
c4307285 | 259 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
260 | { |
261 | msg_set_word(m, 7, a); | |
262 | } | |
263 | ||
c4307285 | 264 | static inline int msg_is_dest(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
265 | { |
266 | return(msg_short(m) || (msg_destnode(m) == d)); | |
267 | } | |
268 | ||
269 | static inline u32 msg_routed(struct tipc_msg *m) | |
270 | { | |
271 | if (likely(msg_short(m))) | |
272 | return 0; | |
273 | return(msg_destnode(m) ^ msg_orignode(m)) >> 11; | |
274 | } | |
275 | ||
c4307285 | 276 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
277 | { |
278 | msg_set_word(m, 8, n); | |
279 | } | |
280 | ||
281 | static inline u32 msg_transp_seqno(struct tipc_msg *m) | |
282 | { | |
283 | return msg_word(m, 8); | |
284 | } | |
285 | ||
286 | static inline void msg_set_timestamp(struct tipc_msg *m, u32 n) | |
287 | { | |
288 | msg_set_word(m, 8, n); | |
289 | } | |
290 | ||
291 | static inline u32 msg_timestamp(struct tipc_msg *m) | |
292 | { | |
293 | return msg_word(m, 8); | |
294 | } | |
295 | ||
296 | static inline void msg_set_transp_seqno(struct tipc_msg *m, u32 n) | |
297 | { | |
298 | msg_set_word(m, 8, n); | |
299 | } | |
300 | ||
c4307285 | 301 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
302 | { |
303 | msg_set_word(m, 9, n); | |
304 | } | |
305 | ||
c4307285 | 306 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
307 | { |
308 | msg_set_namelower(m, n); | |
309 | } | |
310 | ||
c4307285 | 311 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
312 | { |
313 | msg_set_word(m, 10, n); | |
314 | } | |
315 | ||
316 | static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m) | |
317 | { | |
318 | return (struct tipc_msg *)msg_data(m); | |
319 | } | |
320 | ||
b97bf3fd PL |
321 | |
322 | /* | |
323 | TIPC internal message header format, version 2 | |
324 | ||
c4307285 | 325 | 1 0 9 8 7 6 5 4|3 2 1 0 9 8 7 6|5 4 3 2 1 0 9 8|7 6 5 4 3 2 1 0 |
b97bf3fd PL |
326 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
327 | w0:|vers |msg usr|hdr sz |n|resrv| packet size | | |
328 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
329 | w1:|m typ|rsv=0| sequence gap | broadcast ack no | | |
330 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
331 | w2:| link level ack no/bc_gap_from | seq no / bcast_gap_to | | |
332 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
333 | w3:| previous node | | |
334 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
335 | w4:| next sent broadcast/fragm no | next sent pkt/ fragm msg no | | |
336 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
337 | w5:| session no |rsv=0|r|berid|link prio|netpl|p| | |
338 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
339 | w6:| originating node | | |
340 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
341 | w7:| destination node | | |
342 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
343 | w8:| transport sequence number | | |
344 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
345 | w9:| msg count / bcast tag | link tolerance | | |
346 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
347 | \ \ | |
348 | / User Specific Data / | |
349 | \ \ | |
350 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
351 | ||
352 | NB: CONN_MANAGER use data message format. LINK_CONFIG has own format. | |
c4307285 | 353 | */ |
b97bf3fd | 354 | |
c4307285 | 355 | /* |
b97bf3fd PL |
356 | * Internal users |
357 | */ | |
358 | ||
359 | #define BCAST_PROTOCOL 5 | |
360 | #define MSG_BUNDLER 6 | |
361 | #define LINK_PROTOCOL 7 | |
362 | #define CONN_MANAGER 8 | |
363 | #define ROUTE_DISTRIBUTOR 9 | |
364 | #define CHANGEOVER_PROTOCOL 10 | |
365 | #define NAME_DISTRIBUTOR 11 | |
366 | #define MSG_FRAGMENTER 12 | |
367 | #define LINK_CONFIG 13 | |
368 | #define INT_H_SIZE 40 | |
369 | #define DSC_H_SIZE 40 | |
370 | ||
c4307285 | 371 | /* |
b97bf3fd PL |
372 | * Connection management protocol messages |
373 | */ | |
374 | ||
375 | #define CONN_PROBE 0 | |
376 | #define CONN_PROBE_REPLY 1 | |
377 | #define CONN_ACK 2 | |
378 | ||
c4307285 | 379 | /* |
b97bf3fd PL |
380 | * Name distributor messages |
381 | */ | |
382 | ||
383 | #define PUBLICATION 0 | |
384 | #define WITHDRAWAL 1 | |
385 | ||
386 | ||
c4307285 | 387 | /* |
b97bf3fd PL |
388 | * Word 1 |
389 | */ | |
390 | ||
391 | static inline u32 msg_seq_gap(struct tipc_msg *m) | |
392 | { | |
393 | return msg_bits(m, 1, 16, 0xff); | |
394 | } | |
395 | ||
396 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) | |
397 | { | |
398 | msg_set_bits(m, 1, 16, 0xff, n); | |
399 | } | |
400 | ||
401 | static inline u32 msg_req_links(struct tipc_msg *m) | |
402 | { | |
403 | return msg_bits(m, 1, 16, 0xfff); | |
404 | } | |
405 | ||
c4307285 | 406 | static inline void msg_set_req_links(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
407 | { |
408 | msg_set_bits(m, 1, 16, 0xfff, n); | |
409 | } | |
410 | ||
411 | ||
c4307285 | 412 | /* |
b97bf3fd PL |
413 | * Word 2 |
414 | */ | |
415 | ||
416 | static inline u32 msg_dest_domain(struct tipc_msg *m) | |
417 | { | |
418 | return msg_word(m, 2); | |
419 | } | |
420 | ||
c4307285 | 421 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
422 | { |
423 | msg_set_word(m, 2, n); | |
424 | } | |
425 | ||
426 | static inline u32 msg_bcgap_after(struct tipc_msg *m) | |
427 | { | |
428 | return msg_bits(m, 2, 16, 0xffff); | |
429 | } | |
430 | ||
431 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) | |
432 | { | |
433 | msg_set_bits(m, 2, 16, 0xffff, n); | |
434 | } | |
435 | ||
436 | static inline u32 msg_bcgap_to(struct tipc_msg *m) | |
437 | { | |
438 | return msg_bits(m, 2, 0, 0xffff); | |
439 | } | |
440 | ||
c4307285 | 441 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
442 | { |
443 | msg_set_bits(m, 2, 0, 0xffff, n); | |
444 | } | |
445 | ||
446 | ||
c4307285 | 447 | /* |
b97bf3fd PL |
448 | * Word 4 |
449 | */ | |
450 | ||
451 | static inline u32 msg_last_bcast(struct tipc_msg *m) | |
452 | { | |
453 | return msg_bits(m, 4, 16, 0xffff); | |
454 | } | |
455 | ||
456 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) | |
457 | { | |
458 | msg_set_bits(m, 4, 16, 0xffff, n); | |
459 | } | |
460 | ||
461 | ||
462 | static inline u32 msg_fragm_no(struct tipc_msg *m) | |
463 | { | |
464 | return msg_bits(m, 4, 16, 0xffff); | |
465 | } | |
466 | ||
467 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) | |
468 | { | |
469 | msg_set_bits(m, 4, 16, 0xffff, n); | |
470 | } | |
471 | ||
472 | ||
473 | static inline u32 msg_next_sent(struct tipc_msg *m) | |
474 | { | |
475 | return msg_bits(m, 4, 0, 0xffff); | |
476 | } | |
477 | ||
478 | static inline void msg_set_next_sent(struct tipc_msg *m, u32 n) | |
479 | { | |
480 | msg_set_bits(m, 4, 0, 0xffff, n); | |
481 | } | |
482 | ||
483 | ||
484 | static inline u32 msg_long_msgno(struct tipc_msg *m) | |
485 | { | |
486 | return msg_bits(m, 4, 0, 0xffff); | |
487 | } | |
488 | ||
489 | static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) | |
490 | { | |
491 | msg_set_bits(m, 4, 0, 0xffff, n); | |
492 | } | |
493 | ||
494 | static inline u32 msg_bc_netid(struct tipc_msg *m) | |
495 | { | |
496 | return msg_word(m, 4); | |
497 | } | |
498 | ||
499 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) | |
500 | { | |
501 | msg_set_word(m, 4, id); | |
502 | } | |
503 | ||
504 | static inline u32 msg_link_selector(struct tipc_msg *m) | |
505 | { | |
506 | return msg_bits(m, 4, 0, 1); | |
507 | } | |
508 | ||
509 | static inline void msg_set_link_selector(struct tipc_msg *m, u32 n) | |
510 | { | |
511 | msg_set_bits(m, 4, 0, 1, (n & 1)); | |
512 | } | |
513 | ||
c4307285 | 514 | /* |
b97bf3fd PL |
515 | * Word 5 |
516 | */ | |
517 | ||
518 | static inline u32 msg_session(struct tipc_msg *m) | |
519 | { | |
520 | return msg_bits(m, 5, 16, 0xffff); | |
521 | } | |
522 | ||
523 | static inline void msg_set_session(struct tipc_msg *m, u32 n) | |
524 | { | |
525 | msg_set_bits(m, 5, 16, 0xffff, n); | |
526 | } | |
527 | ||
528 | static inline u32 msg_probe(struct tipc_msg *m) | |
529 | { | |
530 | return msg_bits(m, 5, 0, 1); | |
531 | } | |
532 | ||
533 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) | |
534 | { | |
535 | msg_set_bits(m, 5, 0, 1, (val & 1)); | |
536 | } | |
537 | ||
538 | static inline char msg_net_plane(struct tipc_msg *m) | |
539 | { | |
540 | return msg_bits(m, 5, 1, 7) + 'A'; | |
541 | } | |
542 | ||
543 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) | |
544 | { | |
545 | msg_set_bits(m, 5, 1, 7, (n - 'A')); | |
546 | } | |
547 | ||
548 | static inline u32 msg_linkprio(struct tipc_msg *m) | |
549 | { | |
550 | return msg_bits(m, 5, 4, 0x1f); | |
551 | } | |
552 | ||
553 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) | |
554 | { | |
555 | msg_set_bits(m, 5, 4, 0x1f, n); | |
556 | } | |
557 | ||
558 | static inline u32 msg_bearer_id(struct tipc_msg *m) | |
559 | { | |
560 | return msg_bits(m, 5, 9, 0x7); | |
561 | } | |
562 | ||
563 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) | |
564 | { | |
565 | msg_set_bits(m, 5, 9, 0x7, n); | |
566 | } | |
567 | ||
568 | static inline u32 msg_redundant_link(struct tipc_msg *m) | |
569 | { | |
570 | return msg_bits(m, 5, 12, 0x1); | |
571 | } | |
572 | ||
573 | static inline void msg_set_redundant_link(struct tipc_msg *m) | |
574 | { | |
575 | msg_set_bits(m, 5, 12, 0x1, 1); | |
576 | } | |
577 | ||
578 | static inline void msg_clear_redundant_link(struct tipc_msg *m) | |
579 | { | |
580 | msg_set_bits(m, 5, 12, 0x1, 0); | |
581 | } | |
582 | ||
583 | ||
c4307285 | 584 | /* |
b97bf3fd PL |
585 | * Word 9 |
586 | */ | |
587 | ||
588 | static inline u32 msg_msgcnt(struct tipc_msg *m) | |
589 | { | |
590 | return msg_bits(m, 9, 16, 0xffff); | |
591 | } | |
592 | ||
593 | static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n) | |
594 | { | |
595 | msg_set_bits(m, 9, 16, 0xffff, n); | |
596 | } | |
597 | ||
598 | static inline u32 msg_bcast_tag(struct tipc_msg *m) | |
599 | { | |
600 | return msg_bits(m, 9, 16, 0xffff); | |
601 | } | |
602 | ||
603 | static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n) | |
604 | { | |
605 | msg_set_bits(m, 9, 16, 0xffff, n); | |
606 | } | |
607 | ||
c4307285 | 608 | static inline u32 msg_max_pkt(struct tipc_msg *m) |
b97bf3fd PL |
609 | { |
610 | return (msg_bits(m, 9, 16, 0xffff) * 4); | |
611 | } | |
612 | ||
c4307285 | 613 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
614 | { |
615 | msg_set_bits(m, 9, 16, 0xffff, (n / 4)); | |
616 | } | |
617 | ||
618 | static inline u32 msg_link_tolerance(struct tipc_msg *m) | |
619 | { | |
620 | return msg_bits(m, 9, 0, 0xffff); | |
621 | } | |
622 | ||
623 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) | |
624 | { | |
625 | msg_set_bits(m, 9, 0, 0xffff, n); | |
626 | } | |
627 | ||
c4307285 | 628 | /* |
b97bf3fd PL |
629 | * Routing table message data |
630 | */ | |
631 | ||
632 | ||
633 | static inline u32 msg_remote_node(struct tipc_msg *m) | |
634 | { | |
635 | return msg_word(m, msg_hdr_sz(m)/4); | |
636 | } | |
637 | ||
638 | static inline void msg_set_remote_node(struct tipc_msg *m, u32 a) | |
639 | { | |
640 | msg_set_word(m, msg_hdr_sz(m)/4, a); | |
641 | } | |
642 | ||
b97bf3fd PL |
643 | static inline void msg_set_dataoctet(struct tipc_msg *m, u32 pos) |
644 | { | |
645 | msg_data(m)[pos + 4] = 1; | |
646 | } | |
647 | ||
c4307285 | 648 | /* |
b97bf3fd PL |
649 | * Segmentation message types |
650 | */ | |
651 | ||
652 | #define FIRST_FRAGMENT 0 | |
653 | #define FRAGMENT 1 | |
654 | #define LAST_FRAGMENT 2 | |
655 | ||
c4307285 | 656 | /* |
b97bf3fd PL |
657 | * Link management protocol message types |
658 | */ | |
659 | ||
660 | #define STATE_MSG 0 | |
661 | #define RESET_MSG 1 | |
662 | #define ACTIVATE_MSG 2 | |
663 | ||
c4307285 | 664 | /* |
b97bf3fd PL |
665 | * Changeover tunnel message types |
666 | */ | |
667 | #define DUPLICATE_MSG 0 | |
668 | #define ORIGINAL_MSG 1 | |
669 | ||
c4307285 | 670 | /* |
b97bf3fd PL |
671 | * Routing table message types |
672 | */ | |
673 | #define EXT_ROUTING_TABLE 0 | |
674 | #define LOCAL_ROUTING_TABLE 1 | |
675 | #define SLAVE_ROUTING_TABLE 2 | |
676 | #define ROUTE_ADDITION 3 | |
677 | #define ROUTE_REMOVAL 4 | |
678 | ||
c4307285 | 679 | /* |
b97bf3fd PL |
680 | * Config protocol message types |
681 | */ | |
682 | ||
683 | #define DSC_REQ_MSG 0 | |
684 | #define DSC_RESP_MSG 1 | |
685 | ||
686 | static inline u32 msg_tot_importance(struct tipc_msg *m) | |
687 | { | |
688 | if (likely(msg_isdata(m))) { | |
689 | if (likely(msg_orignode(m) == tipc_own_addr)) | |
690 | return msg_importance(m); | |
691 | return msg_importance(m) + 4; | |
692 | } | |
693 | if ((msg_user(m) == MSG_FRAGMENTER) && | |
694 | (msg_type(m) == FIRST_FRAGMENT)) | |
695 | return msg_importance(msg_get_wrapped(m)); | |
696 | return msg_importance(m); | |
697 | } | |
698 | ||
699 | ||
c4307285 | 700 | static inline void msg_init(struct tipc_msg *m, u32 user, u32 type, |
b97bf3fd PL |
701 | u32 err, u32 hsize, u32 destnode) |
702 | { | |
703 | memset(m, 0, hsize); | |
704 | msg_set_version(m); | |
705 | msg_set_user(m, user); | |
706 | msg_set_hdr_sz(m, hsize); | |
707 | msg_set_size(m, hsize); | |
708 | msg_set_prevnode(m, tipc_own_addr); | |
709 | msg_set_type(m, type); | |
710 | msg_set_errcode(m, err); | |
711 | if (!msg_short(m)) { | |
712 | msg_set_orignode(m, tipc_own_addr); | |
713 | msg_set_destnode(m, destnode); | |
714 | } | |
715 | } | |
716 | ||
c4307285 | 717 | /** |
b97bf3fd PL |
718 | * msg_calc_data_size - determine total data size for message |
719 | */ | |
720 | ||
721 | static inline int msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect) | |
722 | { | |
723 | int dsz = 0; | |
724 | int i; | |
725 | ||
726 | for (i = 0; i < num_sect; i++) | |
727 | dsz += msg_sect[i].iov_len; | |
728 | return dsz; | |
729 | } | |
730 | ||
c4307285 | 731 | /** |
b97bf3fd | 732 | * msg_build - create message using specified header and data |
c4307285 | 733 | * |
b97bf3fd | 734 | * Note: Caller must not hold any locks in case copy_from_user() is interrupted! |
c4307285 | 735 | * |
b97bf3fd PL |
736 | * Returns message data size or errno |
737 | */ | |
738 | ||
c4307285 | 739 | static inline int msg_build(struct tipc_msg *hdr, |
b97bf3fd PL |
740 | struct iovec const *msg_sect, u32 num_sect, |
741 | int max_size, int usrmem, struct sk_buff** buf) | |
742 | { | |
743 | int dsz, sz, hsz, pos, res, cnt; | |
744 | ||
745 | dsz = msg_calc_data_size(msg_sect, num_sect); | |
746 | if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) { | |
747 | *buf = NULL; | |
748 | return -EINVAL; | |
749 | } | |
750 | ||
751 | pos = hsz = msg_hdr_sz(hdr); | |
752 | sz = hsz + dsz; | |
753 | msg_set_size(hdr, sz); | |
754 | if (unlikely(sz > max_size)) { | |
755 | *buf = NULL; | |
756 | return dsz; | |
757 | } | |
758 | ||
759 | *buf = buf_acquire(sz); | |
760 | if (!(*buf)) | |
761 | return -ENOMEM; | |
27d7ff46 | 762 | skb_copy_to_linear_data(*buf, hdr, hsz); |
b97bf3fd PL |
763 | for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) { |
764 | if (likely(usrmem)) | |
c4307285 YH |
765 | res = !copy_from_user((*buf)->data + pos, |
766 | msg_sect[cnt].iov_base, | |
b97bf3fd PL |
767 | msg_sect[cnt].iov_len); |
768 | else | |
27d7ff46 ACM |
769 | skb_copy_to_linear_data_offset(*buf, pos, |
770 | msg_sect[cnt].iov_base, | |
771 | msg_sect[cnt].iov_len); | |
b97bf3fd PL |
772 | pos += msg_sect[cnt].iov_len; |
773 | } | |
774 | if (likely(res)) | |
775 | return dsz; | |
776 | ||
777 | buf_discard(*buf); | |
778 | *buf = NULL; | |
779 | return -EFAULT; | |
780 | } | |
781 | ||
4323add6 PL |
782 | static inline void msg_set_media_addr(struct tipc_msg *m, struct tipc_media_addr *a) |
783 | { | |
784 | memcpy(&((int *)m)[5], a, sizeof(*a)); | |
785 | } | |
b97bf3fd | 786 | |
4323add6 PL |
787 | static inline void msg_get_media_addr(struct tipc_msg *m, struct tipc_media_addr *a) |
788 | { | |
789 | memcpy(a, &((int*)m)[5], sizeof(*a)); | |
790 | } | |
b97bf3fd PL |
791 | |
792 | #endif |