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b97bf3fd PL |
1 | /* |
2 | * net/tipc/msg.h: Include file for TIPC message header routines | |
3 | * | |
593a5f22 | 4 | * Copyright (c) 2000-2006, Ericsson AB |
b97bf3fd | 5 | * Copyright (c) 2005, 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 | ||
40 | #include <net/tipc/tipc_msg.h> | |
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 | |
59 | ||
60 | - Fundamental definitions available to privileged TIPC users | |
61 | are located in tipc_msg.h. | |
62 | - Remaining definitions available to TIPC internal users appear below. | |
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 | { | |
74 | u32 word = msg_word(m,w) & ~(mask << pos); | |
75 | msg_set_word(m, w, (word |= (val << pos))); | |
76 | } | |
77 | ||
78 | /* | |
79 | * Word 0 | |
80 | */ | |
81 | ||
82 | static inline u32 msg_version(struct tipc_msg *m) | |
83 | { | |
84 | return msg_bits(m, 0, 29, 7); | |
85 | } | |
86 | ||
87 | static inline void msg_set_version(struct tipc_msg *m) | |
88 | { | |
89 | msg_set_bits(m, 0, 29, 0xf, TIPC_VERSION); | |
90 | } | |
91 | ||
92 | static inline u32 msg_user(struct tipc_msg *m) | |
93 | { | |
94 | return msg_bits(m, 0, 25, 0xf); | |
95 | } | |
96 | ||
97 | static inline u32 msg_isdata(struct tipc_msg *m) | |
98 | { | |
99 | return (msg_user(m) <= DATA_CRITICAL); | |
100 | } | |
101 | ||
102 | static inline void msg_set_user(struct tipc_msg *m, u32 n) | |
103 | { | |
104 | msg_set_bits(m, 0, 25, 0xf, n); | |
105 | } | |
106 | ||
107 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) | |
108 | { | |
109 | msg_set_user(m, i); | |
110 | } | |
111 | ||
112 | static inline void msg_set_hdr_sz(struct tipc_msg *m,u32 n) | |
113 | { | |
114 | msg_set_bits(m, 0, 21, 0xf, n>>2); | |
115 | } | |
116 | ||
117 | static inline int msg_non_seq(struct tipc_msg *m) | |
118 | { | |
119 | return msg_bits(m, 0, 20, 1); | |
120 | } | |
121 | ||
122 | static inline void msg_set_non_seq(struct tipc_msg *m) | |
123 | { | |
124 | msg_set_bits(m, 0, 20, 1, 1); | |
125 | } | |
126 | ||
127 | static inline int msg_dest_droppable(struct tipc_msg *m) | |
128 | { | |
129 | return msg_bits(m, 0, 19, 1); | |
130 | } | |
131 | ||
132 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) | |
133 | { | |
134 | msg_set_bits(m, 0, 19, 1, d); | |
135 | } | |
136 | ||
137 | static inline int msg_src_droppable(struct tipc_msg *m) | |
138 | { | |
139 | return msg_bits(m, 0, 18, 1); | |
140 | } | |
141 | ||
142 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) | |
143 | { | |
144 | msg_set_bits(m, 0, 18, 1, d); | |
145 | } | |
146 | ||
147 | static inline void msg_set_size(struct tipc_msg *m, u32 sz) | |
148 | { | |
149 | m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); | |
150 | } | |
151 | ||
152 | ||
153 | /* | |
154 | * Word 1 | |
155 | */ | |
156 | ||
157 | static inline void msg_set_type(struct tipc_msg *m, u32 n) | |
158 | { | |
159 | msg_set_bits(m, 1, 29, 0x7, n); | |
160 | } | |
161 | ||
162 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) | |
163 | { | |
164 | msg_set_bits(m, 1, 25, 0xf, err); | |
165 | } | |
166 | ||
167 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) | |
168 | { | |
169 | return msg_bits(m, 1, 21, 0xf); | |
170 | } | |
171 | ||
172 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) | |
173 | { | |
174 | msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); | |
175 | } | |
176 | ||
177 | static inline void msg_reset_reroute_cnt(struct tipc_msg *m) | |
178 | { | |
179 | msg_set_bits(m, 1, 21, 0xf, 0); | |
180 | } | |
181 | ||
182 | static inline u32 msg_lookup_scope(struct tipc_msg *m) | |
183 | { | |
184 | return msg_bits(m, 1, 19, 0x3); | |
185 | } | |
186 | ||
187 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) | |
188 | { | |
189 | msg_set_bits(m, 1, 19, 0x3, n); | |
190 | } | |
191 | ||
192 | static inline void msg_set_options(struct tipc_msg *m, const char *opt, u32 sz) | |
193 | { | |
194 | u32 hsz = msg_hdr_sz(m); | |
195 | char *to = (char *)&m->hdr[hsz/4]; | |
196 | ||
197 | if ((hsz < DIR_MSG_H_SIZE) || ((hsz + sz) > MAX_H_SIZE)) | |
198 | return; | |
199 | msg_set_bits(m, 1, 16, 0x7, (hsz - 28)/4); | |
200 | msg_set_hdr_sz(m, hsz + sz); | |
201 | memcpy(to, opt, sz); | |
202 | } | |
203 | ||
204 | static inline u32 msg_bcast_ack(struct tipc_msg *m) | |
205 | { | |
206 | return msg_bits(m, 1, 0, 0xffff); | |
207 | } | |
208 | ||
209 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n) | |
210 | { | |
211 | msg_set_bits(m, 1, 0, 0xffff, n); | |
212 | } | |
213 | ||
214 | ||
215 | /* | |
216 | * Word 2 | |
217 | */ | |
218 | ||
219 | static inline u32 msg_ack(struct tipc_msg *m) | |
220 | { | |
221 | return msg_bits(m, 2, 16, 0xffff); | |
222 | } | |
223 | ||
224 | static inline void msg_set_ack(struct tipc_msg *m, u32 n) | |
225 | { | |
226 | msg_set_bits(m, 2, 16, 0xffff, n); | |
227 | } | |
228 | ||
229 | static inline u32 msg_seqno(struct tipc_msg *m) | |
230 | { | |
231 | return msg_bits(m, 2, 0, 0xffff); | |
232 | } | |
233 | ||
234 | static inline void msg_set_seqno(struct tipc_msg *m, u32 n) | |
235 | { | |
236 | msg_set_bits(m, 2, 0, 0xffff, n); | |
237 | } | |
238 | ||
239 | ||
240 | /* | |
241 | * Words 3-10 | |
242 | */ | |
243 | ||
244 | ||
245 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) | |
246 | { | |
247 | msg_set_word(m, 3, a); | |
248 | } | |
249 | ||
250 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) | |
251 | { | |
252 | msg_set_word(m, 4, p); | |
253 | } | |
254 | ||
255 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) | |
256 | { | |
257 | msg_set_word(m, 5, p); | |
258 | } | |
259 | ||
260 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) | |
261 | { | |
262 | msg_set_word(m, 5, p); | |
263 | } | |
264 | ||
265 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) | |
266 | { | |
267 | msg_set_word(m, 6, a); | |
268 | } | |
269 | ||
270 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) | |
271 | { | |
272 | msg_set_word(m, 7, a); | |
273 | } | |
274 | ||
275 | static inline int msg_is_dest(struct tipc_msg *m, u32 d) | |
276 | { | |
277 | return(msg_short(m) || (msg_destnode(m) == d)); | |
278 | } | |
279 | ||
280 | static inline u32 msg_routed(struct tipc_msg *m) | |
281 | { | |
282 | if (likely(msg_short(m))) | |
283 | return 0; | |
284 | return(msg_destnode(m) ^ msg_orignode(m)) >> 11; | |
285 | } | |
286 | ||
287 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) | |
288 | { | |
289 | msg_set_word(m, 8, n); | |
290 | } | |
291 | ||
292 | static inline u32 msg_transp_seqno(struct tipc_msg *m) | |
293 | { | |
294 | return msg_word(m, 8); | |
295 | } | |
296 | ||
297 | static inline void msg_set_timestamp(struct tipc_msg *m, u32 n) | |
298 | { | |
299 | msg_set_word(m, 8, n); | |
300 | } | |
301 | ||
302 | static inline u32 msg_timestamp(struct tipc_msg *m) | |
303 | { | |
304 | return msg_word(m, 8); | |
305 | } | |
306 | ||
307 | static inline void msg_set_transp_seqno(struct tipc_msg *m, u32 n) | |
308 | { | |
309 | msg_set_word(m, 8, n); | |
310 | } | |
311 | ||
312 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) | |
313 | { | |
314 | msg_set_word(m, 9, n); | |
315 | } | |
316 | ||
317 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) | |
318 | { | |
319 | msg_set_namelower(m, n); | |
320 | } | |
321 | ||
322 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) | |
323 | { | |
324 | msg_set_word(m, 10, n); | |
325 | } | |
326 | ||
327 | static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m) | |
328 | { | |
329 | return (struct tipc_msg *)msg_data(m); | |
330 | } | |
331 | ||
332 | static inline void msg_expand(struct tipc_msg *m, u32 destnode) | |
333 | { | |
334 | if (!msg_short(m)) | |
335 | return; | |
336 | msg_set_hdr_sz(m, LONG_H_SIZE); | |
337 | msg_set_orignode(m, msg_prevnode(m)); | |
338 | msg_set_destnode(m, destnode); | |
339 | memset(&m->hdr[8], 0, 12); | |
340 | } | |
341 | ||
342 | ||
343 | ||
344 | /* | |
345 | TIPC internal message header format, version 2 | |
346 | ||
347 | 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 | |
348 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
349 | w0:|vers |msg usr|hdr sz |n|resrv| packet size | | |
350 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
351 | w1:|m typ|rsv=0| sequence gap | broadcast ack no | | |
352 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
353 | w2:| link level ack no/bc_gap_from | seq no / bcast_gap_to | | |
354 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
355 | w3:| previous node | | |
356 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
357 | w4:| next sent broadcast/fragm no | next sent pkt/ fragm msg no | | |
358 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
359 | w5:| session no |rsv=0|r|berid|link prio|netpl|p| | |
360 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
361 | w6:| originating node | | |
362 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
363 | w7:| destination node | | |
364 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
365 | w8:| transport sequence number | | |
366 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
367 | w9:| msg count / bcast tag | link tolerance | | |
368 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
369 | \ \ | |
370 | / User Specific Data / | |
371 | \ \ | |
372 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
373 | ||
374 | NB: CONN_MANAGER use data message format. LINK_CONFIG has own format. | |
375 | */ | |
376 | ||
377 | /* | |
378 | * Internal users | |
379 | */ | |
380 | ||
381 | #define BCAST_PROTOCOL 5 | |
382 | #define MSG_BUNDLER 6 | |
383 | #define LINK_PROTOCOL 7 | |
384 | #define CONN_MANAGER 8 | |
385 | #define ROUTE_DISTRIBUTOR 9 | |
386 | #define CHANGEOVER_PROTOCOL 10 | |
387 | #define NAME_DISTRIBUTOR 11 | |
388 | #define MSG_FRAGMENTER 12 | |
389 | #define LINK_CONFIG 13 | |
390 | #define INT_H_SIZE 40 | |
391 | #define DSC_H_SIZE 40 | |
392 | ||
393 | /* | |
394 | * Connection management protocol messages | |
395 | */ | |
396 | ||
397 | #define CONN_PROBE 0 | |
398 | #define CONN_PROBE_REPLY 1 | |
399 | #define CONN_ACK 2 | |
400 | ||
401 | /* | |
402 | * Name distributor messages | |
403 | */ | |
404 | ||
405 | #define PUBLICATION 0 | |
406 | #define WITHDRAWAL 1 | |
407 | ||
408 | ||
409 | /* | |
410 | * Word 1 | |
411 | */ | |
412 | ||
413 | static inline u32 msg_seq_gap(struct tipc_msg *m) | |
414 | { | |
415 | return msg_bits(m, 1, 16, 0xff); | |
416 | } | |
417 | ||
418 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) | |
419 | { | |
420 | msg_set_bits(m, 1, 16, 0xff, n); | |
421 | } | |
422 | ||
423 | static inline u32 msg_req_links(struct tipc_msg *m) | |
424 | { | |
425 | return msg_bits(m, 1, 16, 0xfff); | |
426 | } | |
427 | ||
428 | static inline void msg_set_req_links(struct tipc_msg *m, u32 n) | |
429 | { | |
430 | msg_set_bits(m, 1, 16, 0xfff, n); | |
431 | } | |
432 | ||
433 | ||
434 | /* | |
435 | * Word 2 | |
436 | */ | |
437 | ||
438 | static inline u32 msg_dest_domain(struct tipc_msg *m) | |
439 | { | |
440 | return msg_word(m, 2); | |
441 | } | |
442 | ||
443 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) | |
444 | { | |
445 | msg_set_word(m, 2, n); | |
446 | } | |
447 | ||
448 | static inline u32 msg_bcgap_after(struct tipc_msg *m) | |
449 | { | |
450 | return msg_bits(m, 2, 16, 0xffff); | |
451 | } | |
452 | ||
453 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) | |
454 | { | |
455 | msg_set_bits(m, 2, 16, 0xffff, n); | |
456 | } | |
457 | ||
458 | static inline u32 msg_bcgap_to(struct tipc_msg *m) | |
459 | { | |
460 | return msg_bits(m, 2, 0, 0xffff); | |
461 | } | |
462 | ||
463 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) | |
464 | { | |
465 | msg_set_bits(m, 2, 0, 0xffff, n); | |
466 | } | |
467 | ||
468 | ||
469 | /* | |
470 | * Word 4 | |
471 | */ | |
472 | ||
473 | static inline u32 msg_last_bcast(struct tipc_msg *m) | |
474 | { | |
475 | return msg_bits(m, 4, 16, 0xffff); | |
476 | } | |
477 | ||
478 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) | |
479 | { | |
480 | msg_set_bits(m, 4, 16, 0xffff, n); | |
481 | } | |
482 | ||
483 | ||
484 | static inline u32 msg_fragm_no(struct tipc_msg *m) | |
485 | { | |
486 | return msg_bits(m, 4, 16, 0xffff); | |
487 | } | |
488 | ||
489 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) | |
490 | { | |
491 | msg_set_bits(m, 4, 16, 0xffff, n); | |
492 | } | |
493 | ||
494 | ||
495 | static inline u32 msg_next_sent(struct tipc_msg *m) | |
496 | { | |
497 | return msg_bits(m, 4, 0, 0xffff); | |
498 | } | |
499 | ||
500 | static inline void msg_set_next_sent(struct tipc_msg *m, u32 n) | |
501 | { | |
502 | msg_set_bits(m, 4, 0, 0xffff, n); | |
503 | } | |
504 | ||
505 | ||
506 | static inline u32 msg_long_msgno(struct tipc_msg *m) | |
507 | { | |
508 | return msg_bits(m, 4, 0, 0xffff); | |
509 | } | |
510 | ||
511 | static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) | |
512 | { | |
513 | msg_set_bits(m, 4, 0, 0xffff, n); | |
514 | } | |
515 | ||
516 | static inline u32 msg_bc_netid(struct tipc_msg *m) | |
517 | { | |
518 | return msg_word(m, 4); | |
519 | } | |
520 | ||
521 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) | |
522 | { | |
523 | msg_set_word(m, 4, id); | |
524 | } | |
525 | ||
526 | static inline u32 msg_link_selector(struct tipc_msg *m) | |
527 | { | |
528 | return msg_bits(m, 4, 0, 1); | |
529 | } | |
530 | ||
531 | static inline void msg_set_link_selector(struct tipc_msg *m, u32 n) | |
532 | { | |
533 | msg_set_bits(m, 4, 0, 1, (n & 1)); | |
534 | } | |
535 | ||
536 | /* | |
537 | * Word 5 | |
538 | */ | |
539 | ||
540 | static inline u32 msg_session(struct tipc_msg *m) | |
541 | { | |
542 | return msg_bits(m, 5, 16, 0xffff); | |
543 | } | |
544 | ||
545 | static inline void msg_set_session(struct tipc_msg *m, u32 n) | |
546 | { | |
547 | msg_set_bits(m, 5, 16, 0xffff, n); | |
548 | } | |
549 | ||
550 | static inline u32 msg_probe(struct tipc_msg *m) | |
551 | { | |
552 | return msg_bits(m, 5, 0, 1); | |
553 | } | |
554 | ||
555 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) | |
556 | { | |
557 | msg_set_bits(m, 5, 0, 1, (val & 1)); | |
558 | } | |
559 | ||
560 | static inline char msg_net_plane(struct tipc_msg *m) | |
561 | { | |
562 | return msg_bits(m, 5, 1, 7) + 'A'; | |
563 | } | |
564 | ||
565 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) | |
566 | { | |
567 | msg_set_bits(m, 5, 1, 7, (n - 'A')); | |
568 | } | |
569 | ||
570 | static inline u32 msg_linkprio(struct tipc_msg *m) | |
571 | { | |
572 | return msg_bits(m, 5, 4, 0x1f); | |
573 | } | |
574 | ||
575 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) | |
576 | { | |
577 | msg_set_bits(m, 5, 4, 0x1f, n); | |
578 | } | |
579 | ||
580 | static inline u32 msg_bearer_id(struct tipc_msg *m) | |
581 | { | |
582 | return msg_bits(m, 5, 9, 0x7); | |
583 | } | |
584 | ||
585 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) | |
586 | { | |
587 | msg_set_bits(m, 5, 9, 0x7, n); | |
588 | } | |
589 | ||
590 | static inline u32 msg_redundant_link(struct tipc_msg *m) | |
591 | { | |
592 | return msg_bits(m, 5, 12, 0x1); | |
593 | } | |
594 | ||
595 | static inline void msg_set_redundant_link(struct tipc_msg *m) | |
596 | { | |
597 | msg_set_bits(m, 5, 12, 0x1, 1); | |
598 | } | |
599 | ||
600 | static inline void msg_clear_redundant_link(struct tipc_msg *m) | |
601 | { | |
602 | msg_set_bits(m, 5, 12, 0x1, 0); | |
603 | } | |
604 | ||
605 | ||
606 | /* | |
607 | * Word 9 | |
608 | */ | |
609 | ||
610 | static inline u32 msg_msgcnt(struct tipc_msg *m) | |
611 | { | |
612 | return msg_bits(m, 9, 16, 0xffff); | |
613 | } | |
614 | ||
615 | static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n) | |
616 | { | |
617 | msg_set_bits(m, 9, 16, 0xffff, n); | |
618 | } | |
619 | ||
620 | static inline u32 msg_bcast_tag(struct tipc_msg *m) | |
621 | { | |
622 | return msg_bits(m, 9, 16, 0xffff); | |
623 | } | |
624 | ||
625 | static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n) | |
626 | { | |
627 | msg_set_bits(m, 9, 16, 0xffff, n); | |
628 | } | |
629 | ||
630 | static inline u32 msg_max_pkt(struct tipc_msg *m) | |
631 | { | |
632 | return (msg_bits(m, 9, 16, 0xffff) * 4); | |
633 | } | |
634 | ||
635 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) | |
636 | { | |
637 | msg_set_bits(m, 9, 16, 0xffff, (n / 4)); | |
638 | } | |
639 | ||
640 | static inline u32 msg_link_tolerance(struct tipc_msg *m) | |
641 | { | |
642 | return msg_bits(m, 9, 0, 0xffff); | |
643 | } | |
644 | ||
645 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) | |
646 | { | |
647 | msg_set_bits(m, 9, 0, 0xffff, n); | |
648 | } | |
649 | ||
650 | /* | |
651 | * Routing table message data | |
652 | */ | |
653 | ||
654 | ||
655 | static inline u32 msg_remote_node(struct tipc_msg *m) | |
656 | { | |
657 | return msg_word(m, msg_hdr_sz(m)/4); | |
658 | } | |
659 | ||
660 | static inline void msg_set_remote_node(struct tipc_msg *m, u32 a) | |
661 | { | |
662 | msg_set_word(m, msg_hdr_sz(m)/4, a); | |
663 | } | |
664 | ||
665 | static inline int msg_dataoctet(struct tipc_msg *m, u32 pos) | |
666 | { | |
667 | return(msg_data(m)[pos + 4] != 0); | |
668 | } | |
669 | ||
670 | static inline void msg_set_dataoctet(struct tipc_msg *m, u32 pos) | |
671 | { | |
672 | msg_data(m)[pos + 4] = 1; | |
673 | } | |
674 | ||
675 | /* | |
676 | * Segmentation message types | |
677 | */ | |
678 | ||
679 | #define FIRST_FRAGMENT 0 | |
680 | #define FRAGMENT 1 | |
681 | #define LAST_FRAGMENT 2 | |
682 | ||
683 | /* | |
684 | * Link management protocol message types | |
685 | */ | |
686 | ||
687 | #define STATE_MSG 0 | |
688 | #define RESET_MSG 1 | |
689 | #define ACTIVATE_MSG 2 | |
690 | ||
691 | /* | |
692 | * Changeover tunnel message types | |
693 | */ | |
694 | #define DUPLICATE_MSG 0 | |
695 | #define ORIGINAL_MSG 1 | |
696 | ||
697 | /* | |
698 | * Routing table message types | |
699 | */ | |
700 | #define EXT_ROUTING_TABLE 0 | |
701 | #define LOCAL_ROUTING_TABLE 1 | |
702 | #define SLAVE_ROUTING_TABLE 2 | |
703 | #define ROUTE_ADDITION 3 | |
704 | #define ROUTE_REMOVAL 4 | |
705 | ||
706 | /* | |
707 | * Config protocol message types | |
708 | */ | |
709 | ||
710 | #define DSC_REQ_MSG 0 | |
711 | #define DSC_RESP_MSG 1 | |
712 | ||
713 | static inline u32 msg_tot_importance(struct tipc_msg *m) | |
714 | { | |
715 | if (likely(msg_isdata(m))) { | |
716 | if (likely(msg_orignode(m) == tipc_own_addr)) | |
717 | return msg_importance(m); | |
718 | return msg_importance(m) + 4; | |
719 | } | |
720 | if ((msg_user(m) == MSG_FRAGMENTER) && | |
721 | (msg_type(m) == FIRST_FRAGMENT)) | |
722 | return msg_importance(msg_get_wrapped(m)); | |
723 | return msg_importance(m); | |
724 | } | |
725 | ||
726 | ||
727 | static inline void msg_init(struct tipc_msg *m, u32 user, u32 type, | |
728 | u32 err, u32 hsize, u32 destnode) | |
729 | { | |
730 | memset(m, 0, hsize); | |
731 | msg_set_version(m); | |
732 | msg_set_user(m, user); | |
733 | msg_set_hdr_sz(m, hsize); | |
734 | msg_set_size(m, hsize); | |
735 | msg_set_prevnode(m, tipc_own_addr); | |
736 | msg_set_type(m, type); | |
737 | msg_set_errcode(m, err); | |
738 | if (!msg_short(m)) { | |
739 | msg_set_orignode(m, tipc_own_addr); | |
740 | msg_set_destnode(m, destnode); | |
741 | } | |
742 | } | |
743 | ||
744 | /** | |
745 | * msg_calc_data_size - determine total data size for message | |
746 | */ | |
747 | ||
748 | static inline int msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect) | |
749 | { | |
750 | int dsz = 0; | |
751 | int i; | |
752 | ||
753 | for (i = 0; i < num_sect; i++) | |
754 | dsz += msg_sect[i].iov_len; | |
755 | return dsz; | |
756 | } | |
757 | ||
758 | /** | |
759 | * msg_build - create message using specified header and data | |
760 | * | |
761 | * Note: Caller must not hold any locks in case copy_from_user() is interrupted! | |
762 | * | |
763 | * Returns message data size or errno | |
764 | */ | |
765 | ||
766 | static inline int msg_build(struct tipc_msg *hdr, | |
767 | struct iovec const *msg_sect, u32 num_sect, | |
768 | int max_size, int usrmem, struct sk_buff** buf) | |
769 | { | |
770 | int dsz, sz, hsz, pos, res, cnt; | |
771 | ||
772 | dsz = msg_calc_data_size(msg_sect, num_sect); | |
773 | if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) { | |
774 | *buf = NULL; | |
775 | return -EINVAL; | |
776 | } | |
777 | ||
778 | pos = hsz = msg_hdr_sz(hdr); | |
779 | sz = hsz + dsz; | |
780 | msg_set_size(hdr, sz); | |
781 | if (unlikely(sz > max_size)) { | |
782 | *buf = NULL; | |
783 | return dsz; | |
784 | } | |
785 | ||
786 | *buf = buf_acquire(sz); | |
787 | if (!(*buf)) | |
788 | return -ENOMEM; | |
789 | memcpy((*buf)->data, (unchar *)hdr, hsz); | |
790 | for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) { | |
791 | if (likely(usrmem)) | |
792 | res = !copy_from_user((*buf)->data + pos, | |
793 | msg_sect[cnt].iov_base, | |
794 | msg_sect[cnt].iov_len); | |
795 | else | |
796 | memcpy((*buf)->data + pos, msg_sect[cnt].iov_base, | |
797 | msg_sect[cnt].iov_len); | |
798 | pos += msg_sect[cnt].iov_len; | |
799 | } | |
800 | if (likely(res)) | |
801 | return dsz; | |
802 | ||
803 | buf_discard(*buf); | |
804 | *buf = NULL; | |
805 | return -EFAULT; | |
806 | } | |
807 | ||
808 | ||
809 | struct tipc_media_addr; | |
810 | ||
811 | extern void msg_set_media_addr(struct tipc_msg *m, | |
812 | struct tipc_media_addr *a); | |
813 | ||
814 | extern void msg_get_media_addr(struct tipc_msg *m, | |
815 | struct tipc_media_addr *a); | |
816 | ||
817 | ||
818 | #endif |