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1 | /* |
2 | * net/tipc/msg.h: Include file for TIPC message header routines | |
3 | * | |
4 | * Copyright (c) 2003-2005, Ericsson Research Canada | |
5 | * Copyright (c) 2005, Wind River Systems | |
6 | * Copyright (c) 2005-2006, Ericsson AB | |
7 | * All rights reserved. | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions are met: | |
11 | * | |
12 | * Redistributions of source code must retain the above copyright notice, this | |
13 | * list of conditions and the following disclaimer. | |
14 | * Redistributions in binary form must reproduce the above copyright notice, | |
15 | * this list of conditions and the following disclaimer in the documentation | |
16 | * and/or other materials provided with the distribution. | |
17 | * Neither the names of the copyright holders nor the names of its | |
18 | * contributors may be used to endorse or promote products derived from this | |
19 | * software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
22 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
25 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
29 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
30 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
31 | * POSSIBILITY OF SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef _TIPC_MSG_H | |
35 | #define _TIPC_MSG_H | |
36 | ||
37 | #include <net/tipc/tipc_msg.h> | |
38 | ||
39 | #define TIPC_VERSION 2 | |
40 | #define DATA_LOW TIPC_LOW_IMPORTANCE | |
41 | #define DATA_MEDIUM TIPC_MEDIUM_IMPORTANCE | |
42 | #define DATA_HIGH TIPC_HIGH_IMPORTANCE | |
43 | #define DATA_CRITICAL TIPC_CRITICAL_IMPORTANCE | |
44 | #define SHORT_H_SIZE 24 /* Connected,in cluster */ | |
45 | #define DIR_MSG_H_SIZE 32 /* Directly addressed messages */ | |
46 | #define CONN_MSG_H_SIZE 36 /* Routed connected msgs*/ | |
47 | #define LONG_H_SIZE 40 /* Named Messages */ | |
48 | #define MCAST_H_SIZE 44 /* Multicast messages */ | |
49 | #define MAX_H_SIZE 60 /* Inclusive full options */ | |
50 | #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) | |
51 | #define LINK_CONFIG 13 | |
52 | ||
53 | ||
54 | /* | |
55 | TIPC user data message header format, version 2 | |
56 | ||
57 | - Fundamental definitions available to privileged TIPC users | |
58 | are located in tipc_msg.h. | |
59 | - Remaining definitions available to TIPC internal users appear below. | |
60 | */ | |
61 | ||
62 | ||
63 | static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) | |
64 | { | |
65 | m->hdr[w] = htonl(val); | |
66 | } | |
67 | ||
68 | static inline void msg_set_bits(struct tipc_msg *m, u32 w, | |
69 | u32 pos, u32 mask, u32 val) | |
70 | { | |
71 | u32 word = msg_word(m,w) & ~(mask << pos); | |
72 | msg_set_word(m, w, (word |= (val << pos))); | |
73 | } | |
74 | ||
75 | /* | |
76 | * Word 0 | |
77 | */ | |
78 | ||
79 | static inline u32 msg_version(struct tipc_msg *m) | |
80 | { | |
81 | return msg_bits(m, 0, 29, 7); | |
82 | } | |
83 | ||
84 | static inline void msg_set_version(struct tipc_msg *m) | |
85 | { | |
86 | msg_set_bits(m, 0, 29, 0xf, TIPC_VERSION); | |
87 | } | |
88 | ||
89 | static inline u32 msg_user(struct tipc_msg *m) | |
90 | { | |
91 | return msg_bits(m, 0, 25, 0xf); | |
92 | } | |
93 | ||
94 | static inline u32 msg_isdata(struct tipc_msg *m) | |
95 | { | |
96 | return (msg_user(m) <= DATA_CRITICAL); | |
97 | } | |
98 | ||
99 | static inline void msg_set_user(struct tipc_msg *m, u32 n) | |
100 | { | |
101 | msg_set_bits(m, 0, 25, 0xf, n); | |
102 | } | |
103 | ||
104 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) | |
105 | { | |
106 | msg_set_user(m, i); | |
107 | } | |
108 | ||
109 | static inline void msg_set_hdr_sz(struct tipc_msg *m,u32 n) | |
110 | { | |
111 | msg_set_bits(m, 0, 21, 0xf, n>>2); | |
112 | } | |
113 | ||
114 | static inline int msg_non_seq(struct tipc_msg *m) | |
115 | { | |
116 | return msg_bits(m, 0, 20, 1); | |
117 | } | |
118 | ||
119 | static inline void msg_set_non_seq(struct tipc_msg *m) | |
120 | { | |
121 | msg_set_bits(m, 0, 20, 1, 1); | |
122 | } | |
123 | ||
124 | static inline int msg_dest_droppable(struct tipc_msg *m) | |
125 | { | |
126 | return msg_bits(m, 0, 19, 1); | |
127 | } | |
128 | ||
129 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) | |
130 | { | |
131 | msg_set_bits(m, 0, 19, 1, d); | |
132 | } | |
133 | ||
134 | static inline int msg_src_droppable(struct tipc_msg *m) | |
135 | { | |
136 | return msg_bits(m, 0, 18, 1); | |
137 | } | |
138 | ||
139 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) | |
140 | { | |
141 | msg_set_bits(m, 0, 18, 1, d); | |
142 | } | |
143 | ||
144 | static inline void msg_set_size(struct tipc_msg *m, u32 sz) | |
145 | { | |
146 | m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); | |
147 | } | |
148 | ||
149 | ||
150 | /* | |
151 | * Word 1 | |
152 | */ | |
153 | ||
154 | static inline void msg_set_type(struct tipc_msg *m, u32 n) | |
155 | { | |
156 | msg_set_bits(m, 1, 29, 0x7, n); | |
157 | } | |
158 | ||
159 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) | |
160 | { | |
161 | msg_set_bits(m, 1, 25, 0xf, err); | |
162 | } | |
163 | ||
164 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) | |
165 | { | |
166 | return msg_bits(m, 1, 21, 0xf); | |
167 | } | |
168 | ||
169 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) | |
170 | { | |
171 | msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); | |
172 | } | |
173 | ||
174 | static inline void msg_reset_reroute_cnt(struct tipc_msg *m) | |
175 | { | |
176 | msg_set_bits(m, 1, 21, 0xf, 0); | |
177 | } | |
178 | ||
179 | static inline u32 msg_lookup_scope(struct tipc_msg *m) | |
180 | { | |
181 | return msg_bits(m, 1, 19, 0x3); | |
182 | } | |
183 | ||
184 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) | |
185 | { | |
186 | msg_set_bits(m, 1, 19, 0x3, n); | |
187 | } | |
188 | ||
189 | static inline void msg_set_options(struct tipc_msg *m, const char *opt, u32 sz) | |
190 | { | |
191 | u32 hsz = msg_hdr_sz(m); | |
192 | char *to = (char *)&m->hdr[hsz/4]; | |
193 | ||
194 | if ((hsz < DIR_MSG_H_SIZE) || ((hsz + sz) > MAX_H_SIZE)) | |
195 | return; | |
196 | msg_set_bits(m, 1, 16, 0x7, (hsz - 28)/4); | |
197 | msg_set_hdr_sz(m, hsz + sz); | |
198 | memcpy(to, opt, sz); | |
199 | } | |
200 | ||
201 | static inline u32 msg_bcast_ack(struct tipc_msg *m) | |
202 | { | |
203 | return msg_bits(m, 1, 0, 0xffff); | |
204 | } | |
205 | ||
206 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n) | |
207 | { | |
208 | msg_set_bits(m, 1, 0, 0xffff, n); | |
209 | } | |
210 | ||
211 | ||
212 | /* | |
213 | * Word 2 | |
214 | */ | |
215 | ||
216 | static inline u32 msg_ack(struct tipc_msg *m) | |
217 | { | |
218 | return msg_bits(m, 2, 16, 0xffff); | |
219 | } | |
220 | ||
221 | static inline void msg_set_ack(struct tipc_msg *m, u32 n) | |
222 | { | |
223 | msg_set_bits(m, 2, 16, 0xffff, n); | |
224 | } | |
225 | ||
226 | static inline u32 msg_seqno(struct tipc_msg *m) | |
227 | { | |
228 | return msg_bits(m, 2, 0, 0xffff); | |
229 | } | |
230 | ||
231 | static inline void msg_set_seqno(struct tipc_msg *m, u32 n) | |
232 | { | |
233 | msg_set_bits(m, 2, 0, 0xffff, n); | |
234 | } | |
235 | ||
236 | ||
237 | /* | |
238 | * Words 3-10 | |
239 | */ | |
240 | ||
241 | ||
242 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) | |
243 | { | |
244 | msg_set_word(m, 3, a); | |
245 | } | |
246 | ||
247 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) | |
248 | { | |
249 | msg_set_word(m, 4, p); | |
250 | } | |
251 | ||
252 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) | |
253 | { | |
254 | msg_set_word(m, 5, p); | |
255 | } | |
256 | ||
257 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) | |
258 | { | |
259 | msg_set_word(m, 5, p); | |
260 | } | |
261 | ||
262 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) | |
263 | { | |
264 | msg_set_word(m, 6, a); | |
265 | } | |
266 | ||
267 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) | |
268 | { | |
269 | msg_set_word(m, 7, a); | |
270 | } | |
271 | ||
272 | static inline int msg_is_dest(struct tipc_msg *m, u32 d) | |
273 | { | |
274 | return(msg_short(m) || (msg_destnode(m) == d)); | |
275 | } | |
276 | ||
277 | static inline u32 msg_routed(struct tipc_msg *m) | |
278 | { | |
279 | if (likely(msg_short(m))) | |
280 | return 0; | |
281 | return(msg_destnode(m) ^ msg_orignode(m)) >> 11; | |
282 | } | |
283 | ||
284 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) | |
285 | { | |
286 | msg_set_word(m, 8, n); | |
287 | } | |
288 | ||
289 | static inline u32 msg_transp_seqno(struct tipc_msg *m) | |
290 | { | |
291 | return msg_word(m, 8); | |
292 | } | |
293 | ||
294 | static inline void msg_set_timestamp(struct tipc_msg *m, u32 n) | |
295 | { | |
296 | msg_set_word(m, 8, n); | |
297 | } | |
298 | ||
299 | static inline u32 msg_timestamp(struct tipc_msg *m) | |
300 | { | |
301 | return msg_word(m, 8); | |
302 | } | |
303 | ||
304 | static inline void msg_set_transp_seqno(struct tipc_msg *m, u32 n) | |
305 | { | |
306 | msg_set_word(m, 8, n); | |
307 | } | |
308 | ||
309 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) | |
310 | { | |
311 | msg_set_word(m, 9, n); | |
312 | } | |
313 | ||
314 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) | |
315 | { | |
316 | msg_set_namelower(m, n); | |
317 | } | |
318 | ||
319 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) | |
320 | { | |
321 | msg_set_word(m, 10, n); | |
322 | } | |
323 | ||
324 | static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m) | |
325 | { | |
326 | return (struct tipc_msg *)msg_data(m); | |
327 | } | |
328 | ||
329 | static inline void msg_expand(struct tipc_msg *m, u32 destnode) | |
330 | { | |
331 | if (!msg_short(m)) | |
332 | return; | |
333 | msg_set_hdr_sz(m, LONG_H_SIZE); | |
334 | msg_set_orignode(m, msg_prevnode(m)); | |
335 | msg_set_destnode(m, destnode); | |
336 | memset(&m->hdr[8], 0, 12); | |
337 | } | |
338 | ||
339 | ||
340 | ||
341 | /* | |
342 | TIPC internal message header format, version 2 | |
343 | ||
344 | 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 | |
345 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
346 | w0:|vers |msg usr|hdr sz |n|resrv| packet size | | |
347 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
348 | w1:|m typ|rsv=0| sequence gap | broadcast ack no | | |
349 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
350 | w2:| link level ack no/bc_gap_from | seq no / bcast_gap_to | | |
351 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
352 | w3:| previous node | | |
353 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
354 | w4:| next sent broadcast/fragm no | next sent pkt/ fragm msg no | | |
355 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
356 | w5:| session no |rsv=0|r|berid|link prio|netpl|p| | |
357 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
358 | w6:| originating node | | |
359 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
360 | w7:| destination node | | |
361 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
362 | w8:| transport sequence number | | |
363 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
364 | w9:| msg count / bcast tag | link tolerance | | |
365 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
366 | \ \ | |
367 | / User Specific Data / | |
368 | \ \ | |
369 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
370 | ||
371 | NB: CONN_MANAGER use data message format. LINK_CONFIG has own format. | |
372 | */ | |
373 | ||
374 | /* | |
375 | * Internal users | |
376 | */ | |
377 | ||
378 | #define BCAST_PROTOCOL 5 | |
379 | #define MSG_BUNDLER 6 | |
380 | #define LINK_PROTOCOL 7 | |
381 | #define CONN_MANAGER 8 | |
382 | #define ROUTE_DISTRIBUTOR 9 | |
383 | #define CHANGEOVER_PROTOCOL 10 | |
384 | #define NAME_DISTRIBUTOR 11 | |
385 | #define MSG_FRAGMENTER 12 | |
386 | #define LINK_CONFIG 13 | |
387 | #define INT_H_SIZE 40 | |
388 | #define DSC_H_SIZE 40 | |
389 | ||
390 | /* | |
391 | * Connection management protocol messages | |
392 | */ | |
393 | ||
394 | #define CONN_PROBE 0 | |
395 | #define CONN_PROBE_REPLY 1 | |
396 | #define CONN_ACK 2 | |
397 | ||
398 | /* | |
399 | * Name distributor messages | |
400 | */ | |
401 | ||
402 | #define PUBLICATION 0 | |
403 | #define WITHDRAWAL 1 | |
404 | ||
405 | ||
406 | /* | |
407 | * Word 1 | |
408 | */ | |
409 | ||
410 | static inline u32 msg_seq_gap(struct tipc_msg *m) | |
411 | { | |
412 | return msg_bits(m, 1, 16, 0xff); | |
413 | } | |
414 | ||
415 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) | |
416 | { | |
417 | msg_set_bits(m, 1, 16, 0xff, n); | |
418 | } | |
419 | ||
420 | static inline u32 msg_req_links(struct tipc_msg *m) | |
421 | { | |
422 | return msg_bits(m, 1, 16, 0xfff); | |
423 | } | |
424 | ||
425 | static inline void msg_set_req_links(struct tipc_msg *m, u32 n) | |
426 | { | |
427 | msg_set_bits(m, 1, 16, 0xfff, n); | |
428 | } | |
429 | ||
430 | ||
431 | /* | |
432 | * Word 2 | |
433 | */ | |
434 | ||
435 | static inline u32 msg_dest_domain(struct tipc_msg *m) | |
436 | { | |
437 | return msg_word(m, 2); | |
438 | } | |
439 | ||
440 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) | |
441 | { | |
442 | msg_set_word(m, 2, n); | |
443 | } | |
444 | ||
445 | static inline u32 msg_bcgap_after(struct tipc_msg *m) | |
446 | { | |
447 | return msg_bits(m, 2, 16, 0xffff); | |
448 | } | |
449 | ||
450 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) | |
451 | { | |
452 | msg_set_bits(m, 2, 16, 0xffff, n); | |
453 | } | |
454 | ||
455 | static inline u32 msg_bcgap_to(struct tipc_msg *m) | |
456 | { | |
457 | return msg_bits(m, 2, 0, 0xffff); | |
458 | } | |
459 | ||
460 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) | |
461 | { | |
462 | msg_set_bits(m, 2, 0, 0xffff, n); | |
463 | } | |
464 | ||
465 | ||
466 | /* | |
467 | * Word 4 | |
468 | */ | |
469 | ||
470 | static inline u32 msg_last_bcast(struct tipc_msg *m) | |
471 | { | |
472 | return msg_bits(m, 4, 16, 0xffff); | |
473 | } | |
474 | ||
475 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) | |
476 | { | |
477 | msg_set_bits(m, 4, 16, 0xffff, n); | |
478 | } | |
479 | ||
480 | ||
481 | static inline u32 msg_fragm_no(struct tipc_msg *m) | |
482 | { | |
483 | return msg_bits(m, 4, 16, 0xffff); | |
484 | } | |
485 | ||
486 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) | |
487 | { | |
488 | msg_set_bits(m, 4, 16, 0xffff, n); | |
489 | } | |
490 | ||
491 | ||
492 | static inline u32 msg_next_sent(struct tipc_msg *m) | |
493 | { | |
494 | return msg_bits(m, 4, 0, 0xffff); | |
495 | } | |
496 | ||
497 | static inline void msg_set_next_sent(struct tipc_msg *m, u32 n) | |
498 | { | |
499 | msg_set_bits(m, 4, 0, 0xffff, n); | |
500 | } | |
501 | ||
502 | ||
503 | static inline u32 msg_long_msgno(struct tipc_msg *m) | |
504 | { | |
505 | return msg_bits(m, 4, 0, 0xffff); | |
506 | } | |
507 | ||
508 | static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) | |
509 | { | |
510 | msg_set_bits(m, 4, 0, 0xffff, n); | |
511 | } | |
512 | ||
513 | static inline u32 msg_bc_netid(struct tipc_msg *m) | |
514 | { | |
515 | return msg_word(m, 4); | |
516 | } | |
517 | ||
518 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) | |
519 | { | |
520 | msg_set_word(m, 4, id); | |
521 | } | |
522 | ||
523 | static inline u32 msg_link_selector(struct tipc_msg *m) | |
524 | { | |
525 | return msg_bits(m, 4, 0, 1); | |
526 | } | |
527 | ||
528 | static inline void msg_set_link_selector(struct tipc_msg *m, u32 n) | |
529 | { | |
530 | msg_set_bits(m, 4, 0, 1, (n & 1)); | |
531 | } | |
532 | ||
533 | /* | |
534 | * Word 5 | |
535 | */ | |
536 | ||
537 | static inline u32 msg_session(struct tipc_msg *m) | |
538 | { | |
539 | return msg_bits(m, 5, 16, 0xffff); | |
540 | } | |
541 | ||
542 | static inline void msg_set_session(struct tipc_msg *m, u32 n) | |
543 | { | |
544 | msg_set_bits(m, 5, 16, 0xffff, n); | |
545 | } | |
546 | ||
547 | static inline u32 msg_probe(struct tipc_msg *m) | |
548 | { | |
549 | return msg_bits(m, 5, 0, 1); | |
550 | } | |
551 | ||
552 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) | |
553 | { | |
554 | msg_set_bits(m, 5, 0, 1, (val & 1)); | |
555 | } | |
556 | ||
557 | static inline char msg_net_plane(struct tipc_msg *m) | |
558 | { | |
559 | return msg_bits(m, 5, 1, 7) + 'A'; | |
560 | } | |
561 | ||
562 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) | |
563 | { | |
564 | msg_set_bits(m, 5, 1, 7, (n - 'A')); | |
565 | } | |
566 | ||
567 | static inline u32 msg_linkprio(struct tipc_msg *m) | |
568 | { | |
569 | return msg_bits(m, 5, 4, 0x1f); | |
570 | } | |
571 | ||
572 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) | |
573 | { | |
574 | msg_set_bits(m, 5, 4, 0x1f, n); | |
575 | } | |
576 | ||
577 | static inline u32 msg_bearer_id(struct tipc_msg *m) | |
578 | { | |
579 | return msg_bits(m, 5, 9, 0x7); | |
580 | } | |
581 | ||
582 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) | |
583 | { | |
584 | msg_set_bits(m, 5, 9, 0x7, n); | |
585 | } | |
586 | ||
587 | static inline u32 msg_redundant_link(struct tipc_msg *m) | |
588 | { | |
589 | return msg_bits(m, 5, 12, 0x1); | |
590 | } | |
591 | ||
592 | static inline void msg_set_redundant_link(struct tipc_msg *m) | |
593 | { | |
594 | msg_set_bits(m, 5, 12, 0x1, 1); | |
595 | } | |
596 | ||
597 | static inline void msg_clear_redundant_link(struct tipc_msg *m) | |
598 | { | |
599 | msg_set_bits(m, 5, 12, 0x1, 0); | |
600 | } | |
601 | ||
602 | ||
603 | /* | |
604 | * Word 9 | |
605 | */ | |
606 | ||
607 | static inline u32 msg_msgcnt(struct tipc_msg *m) | |
608 | { | |
609 | return msg_bits(m, 9, 16, 0xffff); | |
610 | } | |
611 | ||
612 | static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n) | |
613 | { | |
614 | msg_set_bits(m, 9, 16, 0xffff, n); | |
615 | } | |
616 | ||
617 | static inline u32 msg_bcast_tag(struct tipc_msg *m) | |
618 | { | |
619 | return msg_bits(m, 9, 16, 0xffff); | |
620 | } | |
621 | ||
622 | static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n) | |
623 | { | |
624 | msg_set_bits(m, 9, 16, 0xffff, n); | |
625 | } | |
626 | ||
627 | static inline u32 msg_max_pkt(struct tipc_msg *m) | |
628 | { | |
629 | return (msg_bits(m, 9, 16, 0xffff) * 4); | |
630 | } | |
631 | ||
632 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) | |
633 | { | |
634 | msg_set_bits(m, 9, 16, 0xffff, (n / 4)); | |
635 | } | |
636 | ||
637 | static inline u32 msg_link_tolerance(struct tipc_msg *m) | |
638 | { | |
639 | return msg_bits(m, 9, 0, 0xffff); | |
640 | } | |
641 | ||
642 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) | |
643 | { | |
644 | msg_set_bits(m, 9, 0, 0xffff, n); | |
645 | } | |
646 | ||
647 | /* | |
648 | * Routing table message data | |
649 | */ | |
650 | ||
651 | ||
652 | static inline u32 msg_remote_node(struct tipc_msg *m) | |
653 | { | |
654 | return msg_word(m, msg_hdr_sz(m)/4); | |
655 | } | |
656 | ||
657 | static inline void msg_set_remote_node(struct tipc_msg *m, u32 a) | |
658 | { | |
659 | msg_set_word(m, msg_hdr_sz(m)/4, a); | |
660 | } | |
661 | ||
662 | static inline int msg_dataoctet(struct tipc_msg *m, u32 pos) | |
663 | { | |
664 | return(msg_data(m)[pos + 4] != 0); | |
665 | } | |
666 | ||
667 | static inline void msg_set_dataoctet(struct tipc_msg *m, u32 pos) | |
668 | { | |
669 | msg_data(m)[pos + 4] = 1; | |
670 | } | |
671 | ||
672 | /* | |
673 | * Segmentation message types | |
674 | */ | |
675 | ||
676 | #define FIRST_FRAGMENT 0 | |
677 | #define FRAGMENT 1 | |
678 | #define LAST_FRAGMENT 2 | |
679 | ||
680 | /* | |
681 | * Link management protocol message types | |
682 | */ | |
683 | ||
684 | #define STATE_MSG 0 | |
685 | #define RESET_MSG 1 | |
686 | #define ACTIVATE_MSG 2 | |
687 | ||
688 | /* | |
689 | * Changeover tunnel message types | |
690 | */ | |
691 | #define DUPLICATE_MSG 0 | |
692 | #define ORIGINAL_MSG 1 | |
693 | ||
694 | /* | |
695 | * Routing table message types | |
696 | */ | |
697 | #define EXT_ROUTING_TABLE 0 | |
698 | #define LOCAL_ROUTING_TABLE 1 | |
699 | #define SLAVE_ROUTING_TABLE 2 | |
700 | #define ROUTE_ADDITION 3 | |
701 | #define ROUTE_REMOVAL 4 | |
702 | ||
703 | /* | |
704 | * Config protocol message types | |
705 | */ | |
706 | ||
707 | #define DSC_REQ_MSG 0 | |
708 | #define DSC_RESP_MSG 1 | |
709 | ||
710 | static inline u32 msg_tot_importance(struct tipc_msg *m) | |
711 | { | |
712 | if (likely(msg_isdata(m))) { | |
713 | if (likely(msg_orignode(m) == tipc_own_addr)) | |
714 | return msg_importance(m); | |
715 | return msg_importance(m) + 4; | |
716 | } | |
717 | if ((msg_user(m) == MSG_FRAGMENTER) && | |
718 | (msg_type(m) == FIRST_FRAGMENT)) | |
719 | return msg_importance(msg_get_wrapped(m)); | |
720 | return msg_importance(m); | |
721 | } | |
722 | ||
723 | ||
724 | static inline void msg_init(struct tipc_msg *m, u32 user, u32 type, | |
725 | u32 err, u32 hsize, u32 destnode) | |
726 | { | |
727 | memset(m, 0, hsize); | |
728 | msg_set_version(m); | |
729 | msg_set_user(m, user); | |
730 | msg_set_hdr_sz(m, hsize); | |
731 | msg_set_size(m, hsize); | |
732 | msg_set_prevnode(m, tipc_own_addr); | |
733 | msg_set_type(m, type); | |
734 | msg_set_errcode(m, err); | |
735 | if (!msg_short(m)) { | |
736 | msg_set_orignode(m, tipc_own_addr); | |
737 | msg_set_destnode(m, destnode); | |
738 | } | |
739 | } | |
740 | ||
741 | /** | |
742 | * msg_calc_data_size - determine total data size for message | |
743 | */ | |
744 | ||
745 | static inline int msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect) | |
746 | { | |
747 | int dsz = 0; | |
748 | int i; | |
749 | ||
750 | for (i = 0; i < num_sect; i++) | |
751 | dsz += msg_sect[i].iov_len; | |
752 | return dsz; | |
753 | } | |
754 | ||
755 | /** | |
756 | * msg_build - create message using specified header and data | |
757 | * | |
758 | * Note: Caller must not hold any locks in case copy_from_user() is interrupted! | |
759 | * | |
760 | * Returns message data size or errno | |
761 | */ | |
762 | ||
763 | static inline int msg_build(struct tipc_msg *hdr, | |
764 | struct iovec const *msg_sect, u32 num_sect, | |
765 | int max_size, int usrmem, struct sk_buff** buf) | |
766 | { | |
767 | int dsz, sz, hsz, pos, res, cnt; | |
768 | ||
769 | dsz = msg_calc_data_size(msg_sect, num_sect); | |
770 | if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) { | |
771 | *buf = NULL; | |
772 | return -EINVAL; | |
773 | } | |
774 | ||
775 | pos = hsz = msg_hdr_sz(hdr); | |
776 | sz = hsz + dsz; | |
777 | msg_set_size(hdr, sz); | |
778 | if (unlikely(sz > max_size)) { | |
779 | *buf = NULL; | |
780 | return dsz; | |
781 | } | |
782 | ||
783 | *buf = buf_acquire(sz); | |
784 | if (!(*buf)) | |
785 | return -ENOMEM; | |
786 | memcpy((*buf)->data, (unchar *)hdr, hsz); | |
787 | for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) { | |
788 | if (likely(usrmem)) | |
789 | res = !copy_from_user((*buf)->data + pos, | |
790 | msg_sect[cnt].iov_base, | |
791 | msg_sect[cnt].iov_len); | |
792 | else | |
793 | memcpy((*buf)->data + pos, msg_sect[cnt].iov_base, | |
794 | msg_sect[cnt].iov_len); | |
795 | pos += msg_sect[cnt].iov_len; | |
796 | } | |
797 | if (likely(res)) | |
798 | return dsz; | |
799 | ||
800 | buf_discard(*buf); | |
801 | *buf = NULL; | |
802 | return -EFAULT; | |
803 | } | |
804 | ||
805 | ||
806 | struct tipc_media_addr; | |
807 | ||
808 | extern void msg_set_media_addr(struct tipc_msg *m, | |
809 | struct tipc_media_addr *a); | |
810 | ||
811 | extern void msg_get_media_addr(struct tipc_msg *m, | |
812 | struct tipc_media_addr *a); | |
813 | ||
814 | ||
815 | #endif |