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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 | |
06d82c91 AS |
43 | |
44 | #define SHORT_H_SIZE 24 /* Connected, in-cluster messages */ | |
b97bf3fd | 45 | #define DIR_MSG_H_SIZE 32 /* Directly addressed messages */ |
06d82c91 | 46 | #define LONG_H_SIZE 40 /* Named messages */ |
b97bf3fd | 47 | #define MCAST_H_SIZE 44 /* Multicast messages */ |
06d82c91 AS |
48 | #define INT_H_SIZE 40 /* Internal messages */ |
49 | #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */ | |
50 | #define MAX_H_SIZE 60 /* Largest possible TIPC header size */ | |
51 | ||
b97bf3fd | 52 | #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) |
b97bf3fd PL |
53 | |
54 | ||
55 | /* | |
56 | TIPC user data message header format, version 2 | |
c4307285 | 57 | |
b97bf3fd PL |
58 | - Fundamental definitions available to privileged TIPC users |
59 | are located in tipc_msg.h. | |
c4307285 | 60 | - Remaining definitions available to TIPC internal users appear below. |
b97bf3fd PL |
61 | */ |
62 | ||
63 | ||
64 | static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) | |
65 | { | |
66 | m->hdr[w] = htonl(val); | |
67 | } | |
68 | ||
69 | static inline void msg_set_bits(struct tipc_msg *m, u32 w, | |
70 | u32 pos, u32 mask, u32 val) | |
71 | { | |
1f9eda7e | 72 | val = (val & mask) << pos; |
becf3da2 AV |
73 | mask = mask << pos; |
74 | m->hdr[w] &= ~htonl(mask); | |
75 | m->hdr[w] |= htonl(val); | |
b97bf3fd PL |
76 | } |
77 | ||
c4307285 | 78 | /* |
b97bf3fd PL |
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 | ||
c4307285 | 87 | static inline void msg_set_version(struct tipc_msg *m) |
b97bf3fd | 88 | { |
37695420 | 89 | msg_set_bits(m, 0, 29, 7, TIPC_VERSION); |
b97bf3fd PL |
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 | { | |
06d82c91 | 99 | return (msg_user(m) <= TIPC_CRITICAL_IMPORTANCE); |
b97bf3fd PL |
100 | } |
101 | ||
c4307285 | 102 | static inline void msg_set_user(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
103 | { |
104 | msg_set_bits(m, 0, 25, 0xf, n); | |
105 | } | |
106 | ||
c4307285 | 107 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) |
b97bf3fd PL |
108 | { |
109 | msg_set_user(m, i); | |
110 | } | |
111 | ||
c4307285 | 112 | static inline void msg_set_hdr_sz(struct tipc_msg *m,u32 n) |
b97bf3fd PL |
113 | { |
114 | msg_set_bits(m, 0, 21, 0xf, n>>2); | |
115 | } | |
116 | ||
c4307285 | 117 | static inline int msg_non_seq(struct tipc_msg *m) |
b97bf3fd PL |
118 | { |
119 | return msg_bits(m, 0, 20, 1); | |
120 | } | |
121 | ||
c4307285 | 122 | static inline void msg_set_non_seq(struct tipc_msg *m) |
b97bf3fd PL |
123 | { |
124 | msg_set_bits(m, 0, 20, 1, 1); | |
125 | } | |
126 | ||
c4307285 | 127 | static inline int msg_dest_droppable(struct tipc_msg *m) |
b97bf3fd PL |
128 | { |
129 | return msg_bits(m, 0, 19, 1); | |
130 | } | |
131 | ||
c4307285 | 132 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
133 | { |
134 | msg_set_bits(m, 0, 19, 1, d); | |
135 | } | |
136 | ||
c4307285 | 137 | static inline int msg_src_droppable(struct tipc_msg *m) |
b97bf3fd PL |
138 | { |
139 | return msg_bits(m, 0, 18, 1); | |
140 | } | |
141 | ||
c4307285 | 142 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
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 | ||
c4307285 | 153 | /* |
b97bf3fd PL |
154 | * Word 1 |
155 | */ | |
156 | ||
c4307285 | 157 | static inline void msg_set_type(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
158 | { |
159 | msg_set_bits(m, 1, 29, 0x7, n); | |
160 | } | |
161 | ||
c4307285 | 162 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
b97bf3fd PL |
163 | { |
164 | msg_set_bits(m, 1, 25, 0xf, err); | |
165 | } | |
166 | ||
c4307285 | 167 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
168 | { |
169 | return msg_bits(m, 1, 21, 0xf); | |
170 | } | |
171 | ||
c4307285 | 172 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
173 | { |
174 | msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); | |
175 | } | |
176 | ||
c4307285 | 177 | static inline void msg_reset_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
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 | ||
c4307285 | 187 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
188 | { |
189 | msg_set_bits(m, 1, 19, 0x3, n); | |
190 | } | |
191 | ||
b97bf3fd PL |
192 | static inline u32 msg_bcast_ack(struct tipc_msg *m) |
193 | { | |
194 | return msg_bits(m, 1, 0, 0xffff); | |
195 | } | |
196 | ||
c4307285 | 197 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
198 | { |
199 | msg_set_bits(m, 1, 0, 0xffff, n); | |
200 | } | |
201 | ||
202 | ||
c4307285 | 203 | /* |
b97bf3fd PL |
204 | * Word 2 |
205 | */ | |
206 | ||
207 | static inline u32 msg_ack(struct tipc_msg *m) | |
208 | { | |
209 | return msg_bits(m, 2, 16, 0xffff); | |
210 | } | |
211 | ||
c4307285 | 212 | static inline void msg_set_ack(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
213 | { |
214 | msg_set_bits(m, 2, 16, 0xffff, n); | |
215 | } | |
216 | ||
217 | static inline u32 msg_seqno(struct tipc_msg *m) | |
218 | { | |
219 | return msg_bits(m, 2, 0, 0xffff); | |
220 | } | |
221 | ||
c4307285 | 222 | static inline void msg_set_seqno(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
223 | { |
224 | msg_set_bits(m, 2, 0, 0xffff, n); | |
225 | } | |
226 | ||
227 | ||
c4307285 | 228 | /* |
b97bf3fd PL |
229 | * Words 3-10 |
230 | */ | |
231 | ||
232 | ||
c4307285 | 233 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
234 | { |
235 | msg_set_word(m, 3, a); | |
236 | } | |
237 | ||
c4307285 | 238 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
239 | { |
240 | msg_set_word(m, 4, p); | |
241 | } | |
242 | ||
c4307285 | 243 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
244 | { |
245 | msg_set_word(m, 5, p); | |
246 | } | |
247 | ||
c4307285 | 248 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
249 | { |
250 | msg_set_word(m, 5, p); | |
251 | } | |
252 | ||
c4307285 | 253 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
254 | { |
255 | msg_set_word(m, 6, a); | |
256 | } | |
257 | ||
c4307285 | 258 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
259 | { |
260 | msg_set_word(m, 7, a); | |
261 | } | |
262 | ||
c4307285 | 263 | static inline int msg_is_dest(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
264 | { |
265 | return(msg_short(m) || (msg_destnode(m) == d)); | |
266 | } | |
267 | ||
268 | static inline u32 msg_routed(struct tipc_msg *m) | |
269 | { | |
270 | if (likely(msg_short(m))) | |
271 | return 0; | |
272 | return(msg_destnode(m) ^ msg_orignode(m)) >> 11; | |
273 | } | |
274 | ||
c4307285 | 275 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
276 | { |
277 | msg_set_word(m, 8, n); | |
278 | } | |
279 | ||
280 | static inline u32 msg_transp_seqno(struct tipc_msg *m) | |
281 | { | |
282 | return msg_word(m, 8); | |
283 | } | |
284 | ||
285 | static inline void msg_set_timestamp(struct tipc_msg *m, u32 n) | |
286 | { | |
287 | msg_set_word(m, 8, n); | |
288 | } | |
289 | ||
290 | static inline u32 msg_timestamp(struct tipc_msg *m) | |
291 | { | |
292 | return msg_word(m, 8); | |
293 | } | |
294 | ||
295 | static inline void msg_set_transp_seqno(struct tipc_msg *m, u32 n) | |
296 | { | |
297 | msg_set_word(m, 8, n); | |
298 | } | |
299 | ||
c4307285 | 300 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
301 | { |
302 | msg_set_word(m, 9, n); | |
303 | } | |
304 | ||
c4307285 | 305 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
306 | { |
307 | msg_set_namelower(m, n); | |
308 | } | |
309 | ||
c4307285 | 310 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
311 | { |
312 | msg_set_word(m, 10, n); | |
313 | } | |
314 | ||
315 | static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m) | |
316 | { | |
317 | return (struct tipc_msg *)msg_data(m); | |
318 | } | |
319 | ||
b97bf3fd PL |
320 | |
321 | /* | |
322 | TIPC internal message header format, version 2 | |
323 | ||
c4307285 | 324 | 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 |
325 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
326 | w0:|vers |msg usr|hdr sz |n|resrv| packet size | | |
327 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
328 | w1:|m typ|rsv=0| sequence gap | broadcast ack no | | |
329 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
330 | w2:| link level ack no/bc_gap_from | seq no / bcast_gap_to | | |
331 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
332 | w3:| previous node | | |
333 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
334 | w4:| next sent broadcast/fragm no | next sent pkt/ fragm msg no | | |
335 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
336 | w5:| session no |rsv=0|r|berid|link prio|netpl|p| | |
337 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
338 | w6:| originating node | | |
339 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
340 | w7:| destination node | | |
341 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
342 | w8:| transport sequence number | | |
343 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
344 | w9:| msg count / bcast tag | link tolerance | | |
345 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
346 | \ \ | |
347 | / User Specific Data / | |
348 | \ \ | |
349 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
350 | ||
351 | NB: CONN_MANAGER use data message format. LINK_CONFIG has own format. | |
c4307285 | 352 | */ |
b97bf3fd | 353 | |
c4307285 | 354 | /* |
b97bf3fd PL |
355 | * Internal users |
356 | */ | |
357 | ||
358 | #define BCAST_PROTOCOL 5 | |
359 | #define MSG_BUNDLER 6 | |
360 | #define LINK_PROTOCOL 7 | |
361 | #define CONN_MANAGER 8 | |
362 | #define ROUTE_DISTRIBUTOR 9 | |
363 | #define CHANGEOVER_PROTOCOL 10 | |
364 | #define NAME_DISTRIBUTOR 11 | |
365 | #define MSG_FRAGMENTER 12 | |
366 | #define LINK_CONFIG 13 | |
b97bf3fd PL |
367 | #define DSC_H_SIZE 40 |
368 | ||
c4307285 | 369 | /* |
b97bf3fd PL |
370 | * Connection management protocol messages |
371 | */ | |
372 | ||
373 | #define CONN_PROBE 0 | |
374 | #define CONN_PROBE_REPLY 1 | |
375 | #define CONN_ACK 2 | |
376 | ||
c4307285 | 377 | /* |
b97bf3fd PL |
378 | * Name distributor messages |
379 | */ | |
380 | ||
381 | #define PUBLICATION 0 | |
382 | #define WITHDRAWAL 1 | |
383 | ||
384 | ||
c4307285 | 385 | /* |
b97bf3fd PL |
386 | * Word 1 |
387 | */ | |
388 | ||
389 | static inline u32 msg_seq_gap(struct tipc_msg *m) | |
390 | { | |
391 | return msg_bits(m, 1, 16, 0xff); | |
392 | } | |
393 | ||
394 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) | |
395 | { | |
396 | msg_set_bits(m, 1, 16, 0xff, n); | |
397 | } | |
398 | ||
399 | static inline u32 msg_req_links(struct tipc_msg *m) | |
400 | { | |
401 | return msg_bits(m, 1, 16, 0xfff); | |
402 | } | |
403 | ||
c4307285 | 404 | static inline void msg_set_req_links(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
405 | { |
406 | msg_set_bits(m, 1, 16, 0xfff, n); | |
407 | } | |
408 | ||
409 | ||
c4307285 | 410 | /* |
b97bf3fd PL |
411 | * Word 2 |
412 | */ | |
413 | ||
414 | static inline u32 msg_dest_domain(struct tipc_msg *m) | |
415 | { | |
416 | return msg_word(m, 2); | |
417 | } | |
418 | ||
c4307285 | 419 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
420 | { |
421 | msg_set_word(m, 2, n); | |
422 | } | |
423 | ||
424 | static inline u32 msg_bcgap_after(struct tipc_msg *m) | |
425 | { | |
426 | return msg_bits(m, 2, 16, 0xffff); | |
427 | } | |
428 | ||
429 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) | |
430 | { | |
431 | msg_set_bits(m, 2, 16, 0xffff, n); | |
432 | } | |
433 | ||
434 | static inline u32 msg_bcgap_to(struct tipc_msg *m) | |
435 | { | |
436 | return msg_bits(m, 2, 0, 0xffff); | |
437 | } | |
438 | ||
c4307285 | 439 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
440 | { |
441 | msg_set_bits(m, 2, 0, 0xffff, n); | |
442 | } | |
443 | ||
444 | ||
c4307285 | 445 | /* |
b97bf3fd PL |
446 | * Word 4 |
447 | */ | |
448 | ||
449 | static inline u32 msg_last_bcast(struct tipc_msg *m) | |
450 | { | |
451 | return msg_bits(m, 4, 16, 0xffff); | |
452 | } | |
453 | ||
454 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) | |
455 | { | |
456 | msg_set_bits(m, 4, 16, 0xffff, n); | |
457 | } | |
458 | ||
459 | ||
460 | static inline u32 msg_fragm_no(struct tipc_msg *m) | |
461 | { | |
462 | return msg_bits(m, 4, 16, 0xffff); | |
463 | } | |
464 | ||
465 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) | |
466 | { | |
467 | msg_set_bits(m, 4, 16, 0xffff, n); | |
468 | } | |
469 | ||
470 | ||
471 | static inline u32 msg_next_sent(struct tipc_msg *m) | |
472 | { | |
473 | return msg_bits(m, 4, 0, 0xffff); | |
474 | } | |
475 | ||
476 | static inline void msg_set_next_sent(struct tipc_msg *m, u32 n) | |
477 | { | |
478 | msg_set_bits(m, 4, 0, 0xffff, n); | |
479 | } | |
480 | ||
481 | ||
482 | static inline u32 msg_long_msgno(struct tipc_msg *m) | |
483 | { | |
484 | return msg_bits(m, 4, 0, 0xffff); | |
485 | } | |
486 | ||
487 | static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) | |
488 | { | |
489 | msg_set_bits(m, 4, 0, 0xffff, n); | |
490 | } | |
491 | ||
492 | static inline u32 msg_bc_netid(struct tipc_msg *m) | |
493 | { | |
494 | return msg_word(m, 4); | |
495 | } | |
496 | ||
497 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) | |
498 | { | |
499 | msg_set_word(m, 4, id); | |
500 | } | |
501 | ||
502 | static inline u32 msg_link_selector(struct tipc_msg *m) | |
503 | { | |
504 | return msg_bits(m, 4, 0, 1); | |
505 | } | |
506 | ||
507 | static inline void msg_set_link_selector(struct tipc_msg *m, u32 n) | |
508 | { | |
509 | msg_set_bits(m, 4, 0, 1, (n & 1)); | |
510 | } | |
511 | ||
c4307285 | 512 | /* |
b97bf3fd PL |
513 | * Word 5 |
514 | */ | |
515 | ||
516 | static inline u32 msg_session(struct tipc_msg *m) | |
517 | { | |
518 | return msg_bits(m, 5, 16, 0xffff); | |
519 | } | |
520 | ||
521 | static inline void msg_set_session(struct tipc_msg *m, u32 n) | |
522 | { | |
523 | msg_set_bits(m, 5, 16, 0xffff, n); | |
524 | } | |
525 | ||
526 | static inline u32 msg_probe(struct tipc_msg *m) | |
527 | { | |
528 | return msg_bits(m, 5, 0, 1); | |
529 | } | |
530 | ||
531 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) | |
532 | { | |
533 | msg_set_bits(m, 5, 0, 1, (val & 1)); | |
534 | } | |
535 | ||
536 | static inline char msg_net_plane(struct tipc_msg *m) | |
537 | { | |
538 | return msg_bits(m, 5, 1, 7) + 'A'; | |
539 | } | |
540 | ||
541 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) | |
542 | { | |
543 | msg_set_bits(m, 5, 1, 7, (n - 'A')); | |
544 | } | |
545 | ||
546 | static inline u32 msg_linkprio(struct tipc_msg *m) | |
547 | { | |
548 | return msg_bits(m, 5, 4, 0x1f); | |
549 | } | |
550 | ||
551 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) | |
552 | { | |
553 | msg_set_bits(m, 5, 4, 0x1f, n); | |
554 | } | |
555 | ||
556 | static inline u32 msg_bearer_id(struct tipc_msg *m) | |
557 | { | |
558 | return msg_bits(m, 5, 9, 0x7); | |
559 | } | |
560 | ||
561 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) | |
562 | { | |
563 | msg_set_bits(m, 5, 9, 0x7, n); | |
564 | } | |
565 | ||
566 | static inline u32 msg_redundant_link(struct tipc_msg *m) | |
567 | { | |
568 | return msg_bits(m, 5, 12, 0x1); | |
569 | } | |
570 | ||
571 | static inline void msg_set_redundant_link(struct tipc_msg *m) | |
572 | { | |
573 | msg_set_bits(m, 5, 12, 0x1, 1); | |
574 | } | |
575 | ||
576 | static inline void msg_clear_redundant_link(struct tipc_msg *m) | |
577 | { | |
578 | msg_set_bits(m, 5, 12, 0x1, 0); | |
579 | } | |
580 | ||
581 | ||
c4307285 | 582 | /* |
b97bf3fd PL |
583 | * Word 9 |
584 | */ | |
585 | ||
586 | static inline u32 msg_msgcnt(struct tipc_msg *m) | |
587 | { | |
588 | return msg_bits(m, 9, 16, 0xffff); | |
589 | } | |
590 | ||
591 | static inline void msg_set_msgcnt(struct tipc_msg *m, u32 n) | |
592 | { | |
593 | msg_set_bits(m, 9, 16, 0xffff, n); | |
594 | } | |
595 | ||
596 | static inline u32 msg_bcast_tag(struct tipc_msg *m) | |
597 | { | |
598 | return msg_bits(m, 9, 16, 0xffff); | |
599 | } | |
600 | ||
601 | static inline void msg_set_bcast_tag(struct tipc_msg *m, u32 n) | |
602 | { | |
603 | msg_set_bits(m, 9, 16, 0xffff, n); | |
604 | } | |
605 | ||
c4307285 | 606 | static inline u32 msg_max_pkt(struct tipc_msg *m) |
b97bf3fd PL |
607 | { |
608 | return (msg_bits(m, 9, 16, 0xffff) * 4); | |
609 | } | |
610 | ||
c4307285 | 611 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
612 | { |
613 | msg_set_bits(m, 9, 16, 0xffff, (n / 4)); | |
614 | } | |
615 | ||
616 | static inline u32 msg_link_tolerance(struct tipc_msg *m) | |
617 | { | |
618 | return msg_bits(m, 9, 0, 0xffff); | |
619 | } | |
620 | ||
621 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) | |
622 | { | |
623 | msg_set_bits(m, 9, 0, 0xffff, n); | |
624 | } | |
625 | ||
c4307285 | 626 | /* |
b97bf3fd PL |
627 | * Routing table message data |
628 | */ | |
629 | ||
630 | ||
631 | static inline u32 msg_remote_node(struct tipc_msg *m) | |
632 | { | |
633 | return msg_word(m, msg_hdr_sz(m)/4); | |
634 | } | |
635 | ||
636 | static inline void msg_set_remote_node(struct tipc_msg *m, u32 a) | |
637 | { | |
638 | msg_set_word(m, msg_hdr_sz(m)/4, a); | |
639 | } | |
640 | ||
b97bf3fd PL |
641 | static inline void msg_set_dataoctet(struct tipc_msg *m, u32 pos) |
642 | { | |
643 | msg_data(m)[pos + 4] = 1; | |
644 | } | |
645 | ||
c4307285 | 646 | /* |
b97bf3fd PL |
647 | * Segmentation message types |
648 | */ | |
649 | ||
650 | #define FIRST_FRAGMENT 0 | |
651 | #define FRAGMENT 1 | |
652 | #define LAST_FRAGMENT 2 | |
653 | ||
c4307285 | 654 | /* |
b97bf3fd PL |
655 | * Link management protocol message types |
656 | */ | |
657 | ||
658 | #define STATE_MSG 0 | |
659 | #define RESET_MSG 1 | |
660 | #define ACTIVATE_MSG 2 | |
661 | ||
c4307285 | 662 | /* |
b97bf3fd PL |
663 | * Changeover tunnel message types |
664 | */ | |
665 | #define DUPLICATE_MSG 0 | |
666 | #define ORIGINAL_MSG 1 | |
667 | ||
c4307285 | 668 | /* |
b97bf3fd PL |
669 | * Routing table message types |
670 | */ | |
671 | #define EXT_ROUTING_TABLE 0 | |
672 | #define LOCAL_ROUTING_TABLE 1 | |
673 | #define SLAVE_ROUTING_TABLE 2 | |
674 | #define ROUTE_ADDITION 3 | |
675 | #define ROUTE_REMOVAL 4 | |
676 | ||
c4307285 | 677 | /* |
b97bf3fd PL |
678 | * Config protocol message types |
679 | */ | |
680 | ||
681 | #define DSC_REQ_MSG 0 | |
682 | #define DSC_RESP_MSG 1 | |
683 | ||
684 | static inline u32 msg_tot_importance(struct tipc_msg *m) | |
685 | { | |
686 | if (likely(msg_isdata(m))) { | |
687 | if (likely(msg_orignode(m) == tipc_own_addr)) | |
688 | return msg_importance(m); | |
689 | return msg_importance(m) + 4; | |
690 | } | |
691 | if ((msg_user(m) == MSG_FRAGMENTER) && | |
692 | (msg_type(m) == FIRST_FRAGMENT)) | |
693 | return msg_importance(msg_get_wrapped(m)); | |
694 | return msg_importance(m); | |
695 | } | |
696 | ||
697 | ||
c4307285 | 698 | static inline void msg_init(struct tipc_msg *m, u32 user, u32 type, |
b97bf3fd PL |
699 | u32 err, u32 hsize, u32 destnode) |
700 | { | |
701 | memset(m, 0, hsize); | |
702 | msg_set_version(m); | |
703 | msg_set_user(m, user); | |
704 | msg_set_hdr_sz(m, hsize); | |
705 | msg_set_size(m, hsize); | |
706 | msg_set_prevnode(m, tipc_own_addr); | |
707 | msg_set_type(m, type); | |
708 | msg_set_errcode(m, err); | |
709 | if (!msg_short(m)) { | |
710 | msg_set_orignode(m, tipc_own_addr); | |
711 | msg_set_destnode(m, destnode); | |
712 | } | |
713 | } | |
714 | ||
c4307285 | 715 | /** |
b97bf3fd PL |
716 | * msg_calc_data_size - determine total data size for message |
717 | */ | |
718 | ||
719 | static inline int msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect) | |
720 | { | |
721 | int dsz = 0; | |
722 | int i; | |
723 | ||
724 | for (i = 0; i < num_sect; i++) | |
725 | dsz += msg_sect[i].iov_len; | |
726 | return dsz; | |
727 | } | |
728 | ||
c4307285 | 729 | /** |
b97bf3fd | 730 | * msg_build - create message using specified header and data |
c4307285 | 731 | * |
b97bf3fd | 732 | * Note: Caller must not hold any locks in case copy_from_user() is interrupted! |
c4307285 | 733 | * |
b97bf3fd PL |
734 | * Returns message data size or errno |
735 | */ | |
736 | ||
c4307285 | 737 | static inline int msg_build(struct tipc_msg *hdr, |
b97bf3fd PL |
738 | struct iovec const *msg_sect, u32 num_sect, |
739 | int max_size, int usrmem, struct sk_buff** buf) | |
740 | { | |
741 | int dsz, sz, hsz, pos, res, cnt; | |
742 | ||
743 | dsz = msg_calc_data_size(msg_sect, num_sect); | |
744 | if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) { | |
745 | *buf = NULL; | |
746 | return -EINVAL; | |
747 | } | |
748 | ||
749 | pos = hsz = msg_hdr_sz(hdr); | |
750 | sz = hsz + dsz; | |
751 | msg_set_size(hdr, sz); | |
752 | if (unlikely(sz > max_size)) { | |
753 | *buf = NULL; | |
754 | return dsz; | |
755 | } | |
756 | ||
757 | *buf = buf_acquire(sz); | |
758 | if (!(*buf)) | |
759 | return -ENOMEM; | |
27d7ff46 | 760 | skb_copy_to_linear_data(*buf, hdr, hsz); |
b97bf3fd PL |
761 | for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) { |
762 | if (likely(usrmem)) | |
c4307285 YH |
763 | res = !copy_from_user((*buf)->data + pos, |
764 | msg_sect[cnt].iov_base, | |
b97bf3fd PL |
765 | msg_sect[cnt].iov_len); |
766 | else | |
27d7ff46 ACM |
767 | skb_copy_to_linear_data_offset(*buf, pos, |
768 | msg_sect[cnt].iov_base, | |
769 | msg_sect[cnt].iov_len); | |
b97bf3fd PL |
770 | pos += msg_sect[cnt].iov_len; |
771 | } | |
772 | if (likely(res)) | |
773 | return dsz; | |
774 | ||
775 | buf_discard(*buf); | |
776 | *buf = NULL; | |
777 | return -EFAULT; | |
778 | } | |
779 | ||
4323add6 PL |
780 | static inline void msg_set_media_addr(struct tipc_msg *m, struct tipc_media_addr *a) |
781 | { | |
782 | memcpy(&((int *)m)[5], a, sizeof(*a)); | |
783 | } | |
b97bf3fd | 784 | |
4323add6 PL |
785 | static inline void msg_get_media_addr(struct tipc_msg *m, struct tipc_media_addr *a) |
786 | { | |
787 | memcpy(a, &((int*)m)[5], sizeof(*a)); | |
788 | } | |
b97bf3fd PL |
789 | |
790 | #endif |