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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 | * |
cf2157f8 | 4 | * Copyright (c) 2000-2007, 2014-2015 Ericsson AB |
741de3e9 | 5 | * Copyright (c) 2005-2008, 2010-2011, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #ifndef _TIPC_MSG_H | |
38 | #define _TIPC_MSG_H | |
39 | ||
1da46568 | 40 | #include <linux/tipc.h> |
d999297c | 41 | #include "core.h" |
b97bf3fd | 42 | |
cc4c4353 AS |
43 | /* |
44 | * Constants and routines used to read and write TIPC payload message headers | |
45 | * | |
46 | * Note: Some items are also used with TIPC internal message headers | |
47 | */ | |
b97bf3fd | 48 | #define TIPC_VERSION 2 |
c637c103 | 49 | struct plist; |
06d82c91 | 50 | |
d265fef6 | 51 | /* |
cc4c4353 AS |
52 | * Payload message users are defined in TIPC's public API: |
53 | * - TIPC_LOW_IMPORTANCE | |
54 | * - TIPC_MEDIUM_IMPORTANCE | |
55 | * - TIPC_HIGH_IMPORTANCE | |
56 | * - TIPC_CRITICAL_IMPORTANCE | |
57 | */ | |
e3eea1eb JPM |
58 | #define TIPC_SYSTEM_IMPORTANCE 4 |
59 | ||
cc4c4353 AS |
60 | |
61 | /* | |
62 | * Payload message types | |
d265fef6 | 63 | */ |
d265fef6 AS |
64 | #define TIPC_CONN_MSG 0 |
65 | #define TIPC_MCAST_MSG 1 | |
66 | #define TIPC_NAMED_MSG 2 | |
67 | #define TIPC_DIRECT_MSG 3 | |
68 | ||
e3eea1eb JPM |
69 | /* |
70 | * Internal message users | |
71 | */ | |
72 | #define BCAST_PROTOCOL 5 | |
73 | #define MSG_BUNDLER 6 | |
74 | #define LINK_PROTOCOL 7 | |
75 | #define CONN_MANAGER 8 | |
dff29b1a | 76 | #define TUNNEL_PROTOCOL 10 |
e3eea1eb JPM |
77 | #define NAME_DISTRIBUTOR 11 |
78 | #define MSG_FRAGMENTER 12 | |
79 | #define LINK_CONFIG 13 | |
80 | #define SOCK_WAKEUP 14 /* pseudo user */ | |
81 | ||
cc4c4353 AS |
82 | /* |
83 | * Message header sizes | |
84 | */ | |
741d9eb7 AS |
85 | #define SHORT_H_SIZE 24 /* In-cluster basic payload message */ |
86 | #define BASIC_H_SIZE 32 /* Basic payload message */ | |
87 | #define NAMED_H_SIZE 40 /* Named payload message */ | |
88 | #define MCAST_H_SIZE 44 /* Multicast payload message */ | |
06d82c91 AS |
89 | #define INT_H_SIZE 40 /* Internal messages */ |
90 | #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */ | |
91 | #define MAX_H_SIZE 60 /* Largest possible TIPC header size */ | |
92 | ||
b97bf3fd | 93 | #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) |
b97bf3fd | 94 | |
91e2eb56 | 95 | #define TIPC_MEDIA_INFO_OFFSET 5 |
3d749a6a | 96 | |
859fc7c0 YX |
97 | struct tipc_skb_cb { |
98 | void *handle; | |
99 | struct sk_buff *tail; | |
cf2157f8 | 100 | bool validated; |
859fc7c0 | 101 | bool wakeup_pending; |
859fc7c0 YX |
102 | u16 chain_sz; |
103 | u16 chain_imp; | |
c1ab3f1d | 104 | u16 ackers; |
859fc7c0 YX |
105 | }; |
106 | ||
107 | #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0])) | |
108 | ||
d265fef6 AS |
109 | struct tipc_msg { |
110 | __be32 hdr[15]; | |
111 | }; | |
c4307285 | 112 | |
859fc7c0 YX |
113 | static inline struct tipc_msg *buf_msg(struct sk_buff *skb) |
114 | { | |
115 | return (struct tipc_msg *)skb->data; | |
116 | } | |
117 | ||
d265fef6 AS |
118 | static inline u32 msg_word(struct tipc_msg *m, u32 pos) |
119 | { | |
120 | return ntohl(m->hdr[pos]); | |
121 | } | |
b97bf3fd PL |
122 | |
123 | static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) | |
124 | { | |
125 | m->hdr[w] = htonl(val); | |
126 | } | |
127 | ||
d265fef6 AS |
128 | static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask) |
129 | { | |
130 | return (msg_word(m, w) >> pos) & mask; | |
131 | } | |
132 | ||
b97bf3fd PL |
133 | static inline void msg_set_bits(struct tipc_msg *m, u32 w, |
134 | u32 pos, u32 mask, u32 val) | |
135 | { | |
1f9eda7e | 136 | val = (val & mask) << pos; |
becf3da2 AV |
137 | mask = mask << pos; |
138 | m->hdr[w] &= ~htonl(mask); | |
139 | m->hdr[w] |= htonl(val); | |
b97bf3fd PL |
140 | } |
141 | ||
40aecb1b AS |
142 | static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b) |
143 | { | |
144 | u32 temp = msg->hdr[a]; | |
145 | ||
146 | msg->hdr[a] = msg->hdr[b]; | |
147 | msg->hdr[b] = temp; | |
148 | } | |
149 | ||
c4307285 | 150 | /* |
b97bf3fd PL |
151 | * Word 0 |
152 | */ | |
b97bf3fd PL |
153 | static inline u32 msg_version(struct tipc_msg *m) |
154 | { | |
155 | return msg_bits(m, 0, 29, 7); | |
156 | } | |
157 | ||
c4307285 | 158 | static inline void msg_set_version(struct tipc_msg *m) |
b97bf3fd | 159 | { |
37695420 | 160 | msg_set_bits(m, 0, 29, 7, TIPC_VERSION); |
b97bf3fd PL |
161 | } |
162 | ||
163 | static inline u32 msg_user(struct tipc_msg *m) | |
164 | { | |
165 | return msg_bits(m, 0, 25, 0xf); | |
166 | } | |
167 | ||
168 | static inline u32 msg_isdata(struct tipc_msg *m) | |
169 | { | |
a02cec21 | 170 | return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE; |
b97bf3fd PL |
171 | } |
172 | ||
c4307285 | 173 | static inline void msg_set_user(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
174 | { |
175 | msg_set_bits(m, 0, 25, 0xf, n); | |
176 | } | |
177 | ||
d265fef6 AS |
178 | static inline u32 msg_hdr_sz(struct tipc_msg *m) |
179 | { | |
180 | return msg_bits(m, 0, 21, 0xf) << 2; | |
181 | } | |
182 | ||
0e65967e | 183 | static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
184 | { |
185 | msg_set_bits(m, 0, 21, 0xf, n>>2); | |
186 | } | |
187 | ||
d265fef6 AS |
188 | static inline u32 msg_size(struct tipc_msg *m) |
189 | { | |
190 | return msg_bits(m, 0, 0, 0x1ffff); | |
191 | } | |
192 | ||
193 | static inline u32 msg_data_sz(struct tipc_msg *m) | |
194 | { | |
195 | return msg_size(m) - msg_hdr_sz(m); | |
196 | } | |
197 | ||
c4307285 | 198 | static inline int msg_non_seq(struct tipc_msg *m) |
b97bf3fd PL |
199 | { |
200 | return msg_bits(m, 0, 20, 1); | |
201 | } | |
202 | ||
40aecb1b | 203 | static inline void msg_set_non_seq(struct tipc_msg *m, u32 n) |
b97bf3fd | 204 | { |
40aecb1b | 205 | msg_set_bits(m, 0, 20, 1, n); |
b97bf3fd PL |
206 | } |
207 | ||
c4307285 | 208 | static inline int msg_dest_droppable(struct tipc_msg *m) |
b97bf3fd PL |
209 | { |
210 | return msg_bits(m, 0, 19, 1); | |
211 | } | |
212 | ||
c4307285 | 213 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
214 | { |
215 | msg_set_bits(m, 0, 19, 1, d); | |
216 | } | |
217 | ||
c4307285 | 218 | static inline int msg_src_droppable(struct tipc_msg *m) |
b97bf3fd PL |
219 | { |
220 | return msg_bits(m, 0, 18, 1); | |
221 | } | |
222 | ||
c4307285 | 223 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
224 | { |
225 | msg_set_bits(m, 0, 18, 1, d); | |
226 | } | |
227 | ||
228 | static inline void msg_set_size(struct tipc_msg *m, u32 sz) | |
229 | { | |
230 | m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); | |
231 | } | |
232 | ||
3127a020 JPM |
233 | static inline unchar *msg_data(struct tipc_msg *m) |
234 | { | |
235 | return ((unchar *)m) + msg_hdr_sz(m); | |
236 | } | |
237 | ||
238 | static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m) | |
239 | { | |
240 | return (struct tipc_msg *)msg_data(m); | |
241 | } | |
b97bf3fd | 242 | |
c4307285 | 243 | /* |
b97bf3fd PL |
244 | * Word 1 |
245 | */ | |
d265fef6 AS |
246 | static inline u32 msg_type(struct tipc_msg *m) |
247 | { | |
248 | return msg_bits(m, 1, 29, 0x7); | |
249 | } | |
250 | ||
c4307285 | 251 | static inline void msg_set_type(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
252 | { |
253 | msg_set_bits(m, 1, 29, 0x7, n); | |
254 | } | |
255 | ||
d265fef6 AS |
256 | static inline u32 msg_named(struct tipc_msg *m) |
257 | { | |
258 | return msg_type(m) == TIPC_NAMED_MSG; | |
259 | } | |
260 | ||
261 | static inline u32 msg_mcast(struct tipc_msg *m) | |
262 | { | |
263 | return msg_type(m) == TIPC_MCAST_MSG; | |
264 | } | |
265 | ||
266 | static inline u32 msg_connected(struct tipc_msg *m) | |
267 | { | |
268 | return msg_type(m) == TIPC_CONN_MSG; | |
269 | } | |
270 | ||
271 | static inline u32 msg_errcode(struct tipc_msg *m) | |
272 | { | |
273 | return msg_bits(m, 1, 25, 0xf); | |
274 | } | |
275 | ||
c4307285 | 276 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
b97bf3fd PL |
277 | { |
278 | msg_set_bits(m, 1, 25, 0xf, err); | |
279 | } | |
280 | ||
c4307285 | 281 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
282 | { |
283 | return msg_bits(m, 1, 21, 0xf); | |
284 | } | |
285 | ||
c4307285 | 286 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
287 | { |
288 | msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); | |
289 | } | |
290 | ||
c4307285 | 291 | static inline void msg_reset_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
292 | { |
293 | msg_set_bits(m, 1, 21, 0xf, 0); | |
294 | } | |
295 | ||
296 | static inline u32 msg_lookup_scope(struct tipc_msg *m) | |
297 | { | |
298 | return msg_bits(m, 1, 19, 0x3); | |
299 | } | |
300 | ||
c4307285 | 301 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
302 | { |
303 | msg_set_bits(m, 1, 19, 0x3, n); | |
304 | } | |
305 | ||
e4bf4f76 | 306 | static inline u16 msg_bcast_ack(struct tipc_msg *m) |
b97bf3fd PL |
307 | { |
308 | return msg_bits(m, 1, 0, 0xffff); | |
309 | } | |
310 | ||
e4bf4f76 | 311 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
312 | { |
313 | msg_set_bits(m, 1, 0, 0xffff, n); | |
314 | } | |
315 | ||
316 | ||
c4307285 | 317 | /* |
b97bf3fd PL |
318 | * Word 2 |
319 | */ | |
e4bf4f76 | 320 | static inline u16 msg_ack(struct tipc_msg *m) |
b97bf3fd PL |
321 | { |
322 | return msg_bits(m, 2, 16, 0xffff); | |
323 | } | |
324 | ||
e4bf4f76 | 325 | static inline void msg_set_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
326 | { |
327 | msg_set_bits(m, 2, 16, 0xffff, n); | |
328 | } | |
329 | ||
e4bf4f76 | 330 | static inline u16 msg_seqno(struct tipc_msg *m) |
b97bf3fd PL |
331 | { |
332 | return msg_bits(m, 2, 0, 0xffff); | |
333 | } | |
334 | ||
e4bf4f76 | 335 | static inline void msg_set_seqno(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
336 | { |
337 | msg_set_bits(m, 2, 0, 0xffff, n); | |
338 | } | |
339 | ||
c4307285 | 340 | /* |
b97bf3fd PL |
341 | * Words 3-10 |
342 | */ | |
e3eea1eb JPM |
343 | static inline u32 msg_importance(struct tipc_msg *m) |
344 | { | |
f21e897e JPM |
345 | int usr = msg_user(m); |
346 | ||
347 | if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m))) | |
348 | return usr; | |
349 | if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)) | |
dde4b5ae | 350 | return msg_bits(m, 9, 0, 0x7); |
e3eea1eb JPM |
351 | return TIPC_SYSTEM_IMPORTANCE; |
352 | } | |
353 | ||
354 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) | |
355 | { | |
f21e897e JPM |
356 | int usr = msg_user(m); |
357 | ||
358 | if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))) | |
dde4b5ae | 359 | msg_set_bits(m, 9, 0, 0x7, i); |
f21e897e | 360 | else if (i < TIPC_SYSTEM_IMPORTANCE) |
e3eea1eb JPM |
361 | msg_set_user(m, i); |
362 | else | |
363 | pr_warn("Trying to set illegal importance in message\n"); | |
364 | } | |
365 | ||
d265fef6 AS |
366 | static inline u32 msg_prevnode(struct tipc_msg *m) |
367 | { | |
368 | return msg_word(m, 3); | |
369 | } | |
370 | ||
c4307285 | 371 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
372 | { |
373 | msg_set_word(m, 3, a); | |
374 | } | |
375 | ||
d265fef6 AS |
376 | static inline u32 msg_origport(struct tipc_msg *m) |
377 | { | |
3127a020 JPM |
378 | if (msg_user(m) == MSG_FRAGMENTER) |
379 | m = msg_get_wrapped(m); | |
d265fef6 AS |
380 | return msg_word(m, 4); |
381 | } | |
382 | ||
c4307285 | 383 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
384 | { |
385 | msg_set_word(m, 4, p); | |
386 | } | |
387 | ||
d265fef6 AS |
388 | static inline u32 msg_destport(struct tipc_msg *m) |
389 | { | |
390 | return msg_word(m, 5); | |
391 | } | |
392 | ||
c4307285 | 393 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
394 | { |
395 | msg_set_word(m, 5, p); | |
396 | } | |
397 | ||
d265fef6 AS |
398 | static inline u32 msg_mc_netid(struct tipc_msg *m) |
399 | { | |
400 | return msg_word(m, 5); | |
401 | } | |
402 | ||
c4307285 | 403 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
404 | { |
405 | msg_set_word(m, 5, p); | |
406 | } | |
407 | ||
d265fef6 AS |
408 | static inline int msg_short(struct tipc_msg *m) |
409 | { | |
741d9eb7 | 410 | return msg_hdr_sz(m) == SHORT_H_SIZE; |
d265fef6 AS |
411 | } |
412 | ||
413 | static inline u32 msg_orignode(struct tipc_msg *m) | |
414 | { | |
415 | if (likely(msg_short(m))) | |
416 | return msg_prevnode(m); | |
417 | return msg_word(m, 6); | |
418 | } | |
419 | ||
c4307285 | 420 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
421 | { |
422 | msg_set_word(m, 6, a); | |
423 | } | |
424 | ||
d265fef6 AS |
425 | static inline u32 msg_destnode(struct tipc_msg *m) |
426 | { | |
427 | return msg_word(m, 7); | |
428 | } | |
429 | ||
c4307285 | 430 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
431 | { |
432 | msg_set_word(m, 7, a); | |
433 | } | |
434 | ||
d265fef6 AS |
435 | static inline u32 msg_nametype(struct tipc_msg *m) |
436 | { | |
437 | return msg_word(m, 8); | |
438 | } | |
439 | ||
c4307285 | 440 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
441 | { |
442 | msg_set_word(m, 8, n); | |
443 | } | |
444 | ||
d265fef6 AS |
445 | static inline u32 msg_nameinst(struct tipc_msg *m) |
446 | { | |
447 | return msg_word(m, 9); | |
448 | } | |
449 | ||
450 | static inline u32 msg_namelower(struct tipc_msg *m) | |
451 | { | |
452 | return msg_nameinst(m); | |
453 | } | |
454 | ||
c4307285 | 455 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
456 | { |
457 | msg_set_word(m, 9, n); | |
458 | } | |
459 | ||
c4307285 | 460 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
461 | { |
462 | msg_set_namelower(m, n); | |
463 | } | |
464 | ||
d265fef6 AS |
465 | static inline u32 msg_nameupper(struct tipc_msg *m) |
466 | { | |
467 | return msg_word(m, 10); | |
468 | } | |
469 | ||
c4307285 | 470 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
471 | { |
472 | msg_set_word(m, 10, n); | |
473 | } | |
474 | ||
b97bf3fd | 475 | /* |
cc4c4353 AS |
476 | * Constants and routines used to read and write TIPC internal message headers |
477 | */ | |
b97bf3fd | 478 | |
c4307285 | 479 | /* |
cc4c4353 | 480 | * Connection management protocol message types |
b97bf3fd | 481 | */ |
b97bf3fd PL |
482 | #define CONN_PROBE 0 |
483 | #define CONN_PROBE_REPLY 1 | |
484 | #define CONN_ACK 2 | |
485 | ||
c4307285 | 486 | /* |
cc4c4353 | 487 | * Name distributor message types |
b97bf3fd | 488 | */ |
b97bf3fd PL |
489 | #define PUBLICATION 0 |
490 | #define WITHDRAWAL 1 | |
491 | ||
92138d1f AS |
492 | /* |
493 | * Segmentation message types | |
494 | */ | |
92138d1f AS |
495 | #define FIRST_FRAGMENT 0 |
496 | #define FRAGMENT 1 | |
497 | #define LAST_FRAGMENT 2 | |
498 | ||
499 | /* | |
500 | * Link management protocol message types | |
501 | */ | |
92138d1f AS |
502 | #define STATE_MSG 0 |
503 | #define RESET_MSG 1 | |
504 | #define ACTIVATE_MSG 2 | |
505 | ||
506 | /* | |
507 | * Changeover tunnel message types | |
508 | */ | |
dff29b1a JPM |
509 | #define SYNCH_MSG 0 |
510 | #define FAILOVER_MSG 1 | |
92138d1f AS |
511 | |
512 | /* | |
513 | * Config protocol message types | |
514 | */ | |
92138d1f AS |
515 | #define DSC_REQ_MSG 0 |
516 | #define DSC_RESP_MSG 1 | |
517 | ||
c4307285 | 518 | /* |
b97bf3fd PL |
519 | * Word 1 |
520 | */ | |
b97bf3fd PL |
521 | static inline u32 msg_seq_gap(struct tipc_msg *m) |
522 | { | |
bd784533 | 523 | return msg_bits(m, 1, 16, 0x1fff); |
b97bf3fd PL |
524 | } |
525 | ||
526 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) | |
527 | { | |
bd784533 | 528 | msg_set_bits(m, 1, 16, 0x1fff, n); |
b97bf3fd PL |
529 | } |
530 | ||
fc0eea69 AS |
531 | static inline u32 msg_node_sig(struct tipc_msg *m) |
532 | { | |
533 | return msg_bits(m, 1, 0, 0xffff); | |
534 | } | |
535 | ||
536 | static inline void msg_set_node_sig(struct tipc_msg *m, u32 n) | |
537 | { | |
538 | msg_set_bits(m, 1, 0, 0xffff, n); | |
539 | } | |
540 | ||
7764d6e8 JPM |
541 | static inline u32 msg_node_capabilities(struct tipc_msg *m) |
542 | { | |
543 | return msg_bits(m, 1, 15, 0x1fff); | |
544 | } | |
545 | ||
546 | static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n) | |
547 | { | |
548 | msg_set_bits(m, 1, 15, 0x1fff, n); | |
549 | } | |
550 | ||
c4307285 | 551 | /* |
b97bf3fd PL |
552 | * Word 2 |
553 | */ | |
b97bf3fd PL |
554 | static inline u32 msg_dest_domain(struct tipc_msg *m) |
555 | { | |
556 | return msg_word(m, 2); | |
557 | } | |
558 | ||
c4307285 | 559 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
560 | { |
561 | msg_set_word(m, 2, n); | |
562 | } | |
563 | ||
564 | static inline u32 msg_bcgap_after(struct tipc_msg *m) | |
565 | { | |
566 | return msg_bits(m, 2, 16, 0xffff); | |
567 | } | |
568 | ||
569 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) | |
570 | { | |
571 | msg_set_bits(m, 2, 16, 0xffff, n); | |
572 | } | |
573 | ||
574 | static inline u32 msg_bcgap_to(struct tipc_msg *m) | |
575 | { | |
576 | return msg_bits(m, 2, 0, 0xffff); | |
577 | } | |
578 | ||
c4307285 | 579 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
580 | { |
581 | msg_set_bits(m, 2, 0, 0xffff, n); | |
582 | } | |
583 | ||
584 | ||
c4307285 | 585 | /* |
b97bf3fd PL |
586 | * Word 4 |
587 | */ | |
b97bf3fd PL |
588 | static inline u32 msg_last_bcast(struct tipc_msg *m) |
589 | { | |
590 | return msg_bits(m, 4, 16, 0xffff); | |
591 | } | |
592 | ||
52666986 JPM |
593 | static inline u32 msg_bc_snd_nxt(struct tipc_msg *m) |
594 | { | |
595 | return msg_last_bcast(m) + 1; | |
596 | } | |
597 | ||
b97bf3fd PL |
598 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) |
599 | { | |
600 | msg_set_bits(m, 4, 16, 0xffff, n); | |
601 | } | |
602 | ||
b97bf3fd PL |
603 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) |
604 | { | |
605 | msg_set_bits(m, 4, 16, 0xffff, n); | |
606 | } | |
607 | ||
608 | ||
6e498158 | 609 | static inline u16 msg_next_sent(struct tipc_msg *m) |
b97bf3fd PL |
610 | { |
611 | return msg_bits(m, 4, 0, 0xffff); | |
612 | } | |
613 | ||
6e498158 | 614 | static inline void msg_set_next_sent(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
615 | { |
616 | msg_set_bits(m, 4, 0, 0xffff, n); | |
617 | } | |
618 | ||
b97bf3fd PL |
619 | static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) |
620 | { | |
621 | msg_set_bits(m, 4, 0, 0xffff, n); | |
622 | } | |
623 | ||
624 | static inline u32 msg_bc_netid(struct tipc_msg *m) | |
625 | { | |
626 | return msg_word(m, 4); | |
627 | } | |
628 | ||
629 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) | |
630 | { | |
631 | msg_set_word(m, 4, id); | |
632 | } | |
633 | ||
634 | static inline u32 msg_link_selector(struct tipc_msg *m) | |
635 | { | |
636 | return msg_bits(m, 4, 0, 1); | |
637 | } | |
638 | ||
639 | static inline void msg_set_link_selector(struct tipc_msg *m, u32 n) | |
640 | { | |
7eb878ed | 641 | msg_set_bits(m, 4, 0, 1, n); |
b97bf3fd PL |
642 | } |
643 | ||
c4307285 | 644 | /* |
b97bf3fd PL |
645 | * Word 5 |
646 | */ | |
d999297c | 647 | static inline u16 msg_session(struct tipc_msg *m) |
b97bf3fd PL |
648 | { |
649 | return msg_bits(m, 5, 16, 0xffff); | |
650 | } | |
651 | ||
d999297c | 652 | static inline void msg_set_session(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
653 | { |
654 | msg_set_bits(m, 5, 16, 0xffff, n); | |
655 | } | |
656 | ||
657 | static inline u32 msg_probe(struct tipc_msg *m) | |
658 | { | |
659 | return msg_bits(m, 5, 0, 1); | |
660 | } | |
661 | ||
662 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) | |
663 | { | |
7eb878ed | 664 | msg_set_bits(m, 5, 0, 1, val); |
b97bf3fd PL |
665 | } |
666 | ||
667 | static inline char msg_net_plane(struct tipc_msg *m) | |
668 | { | |
669 | return msg_bits(m, 5, 1, 7) + 'A'; | |
670 | } | |
671 | ||
672 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) | |
673 | { | |
674 | msg_set_bits(m, 5, 1, 7, (n - 'A')); | |
675 | } | |
676 | ||
677 | static inline u32 msg_linkprio(struct tipc_msg *m) | |
678 | { | |
679 | return msg_bits(m, 5, 4, 0x1f); | |
680 | } | |
681 | ||
682 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) | |
683 | { | |
684 | msg_set_bits(m, 5, 4, 0x1f, n); | |
685 | } | |
686 | ||
687 | static inline u32 msg_bearer_id(struct tipc_msg *m) | |
688 | { | |
689 | return msg_bits(m, 5, 9, 0x7); | |
690 | } | |
691 | ||
692 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) | |
693 | { | |
694 | msg_set_bits(m, 5, 9, 0x7, n); | |
695 | } | |
696 | ||
697 | static inline u32 msg_redundant_link(struct tipc_msg *m) | |
698 | { | |
699 | return msg_bits(m, 5, 12, 0x1); | |
700 | } | |
701 | ||
77f167fc | 702 | static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r) |
b97bf3fd | 703 | { |
77f167fc | 704 | msg_set_bits(m, 5, 12, 0x1, r); |
b97bf3fd PL |
705 | } |
706 | ||
634696b1 JPM |
707 | static inline u32 msg_peer_stopping(struct tipc_msg *m) |
708 | { | |
709 | return msg_bits(m, 5, 13, 0x1); | |
710 | } | |
711 | ||
712 | static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s) | |
713 | { | |
714 | msg_set_bits(m, 5, 13, 0x1, s); | |
715 | } | |
716 | ||
06bd2b1e JPM |
717 | static inline bool msg_bc_ack_invalid(struct tipc_msg *m) |
718 | { | |
719 | switch (msg_user(m)) { | |
720 | case BCAST_PROTOCOL: | |
721 | case NAME_DISTRIBUTOR: | |
722 | case LINK_PROTOCOL: | |
723 | return msg_bits(m, 5, 14, 0x1); | |
724 | default: | |
725 | return false; | |
726 | } | |
727 | } | |
728 | ||
729 | static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid) | |
730 | { | |
731 | msg_set_bits(m, 5, 14, 0x1, invalid); | |
732 | } | |
733 | ||
3d749a6a AS |
734 | static inline char *msg_media_addr(struct tipc_msg *m) |
735 | { | |
91e2eb56 | 736 | return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET]; |
3d749a6a | 737 | } |
b97bf3fd | 738 | |
02d11ca2 JPM |
739 | static inline u32 msg_bc_gap(struct tipc_msg *m) |
740 | { | |
741 | return msg_bits(m, 8, 0, 0x3ff); | |
742 | } | |
743 | ||
744 | static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n) | |
745 | { | |
746 | msg_set_bits(m, 8, 0, 0x3ff, n); | |
747 | } | |
748 | ||
c4307285 | 749 | /* |
b97bf3fd PL |
750 | * Word 9 |
751 | */ | |
6e498158 | 752 | static inline u16 msg_msgcnt(struct tipc_msg *m) |
b97bf3fd PL |
753 | { |
754 | return msg_bits(m, 9, 16, 0xffff); | |
755 | } | |
756 | ||
6e498158 | 757 | static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
758 | { |
759 | msg_set_bits(m, 9, 16, 0xffff, n); | |
760 | } | |
761 | ||
10724cc7 | 762 | static inline u32 msg_conn_ack(struct tipc_msg *m) |
b97bf3fd PL |
763 | { |
764 | return msg_bits(m, 9, 16, 0xffff); | |
765 | } | |
766 | ||
10724cc7 | 767 | static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
768 | { |
769 | msg_set_bits(m, 9, 16, 0xffff, n); | |
770 | } | |
771 | ||
10724cc7 JPM |
772 | static inline u32 msg_adv_win(struct tipc_msg *m) |
773 | { | |
774 | return msg_bits(m, 9, 0, 0xffff); | |
775 | } | |
776 | ||
777 | static inline void msg_set_adv_win(struct tipc_msg *m, u32 n) | |
778 | { | |
779 | msg_set_bits(m, 9, 0, 0xffff, n); | |
780 | } | |
781 | ||
c4307285 | 782 | static inline u32 msg_max_pkt(struct tipc_msg *m) |
b97bf3fd | 783 | { |
a02cec21 | 784 | return msg_bits(m, 9, 16, 0xffff) * 4; |
b97bf3fd PL |
785 | } |
786 | ||
c4307285 | 787 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
788 | { |
789 | msg_set_bits(m, 9, 16, 0xffff, (n / 4)); | |
790 | } | |
791 | ||
792 | static inline u32 msg_link_tolerance(struct tipc_msg *m) | |
793 | { | |
794 | return msg_bits(m, 9, 0, 0xffff); | |
795 | } | |
796 | ||
797 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) | |
798 | { | |
799 | msg_set_bits(m, 9, 0, 0xffff, n); | |
800 | } | |
801 | ||
6e498158 | 802 | static inline bool msg_peer_link_is_up(struct tipc_msg *m) |
1a20cc25 | 803 | { |
d999297c | 804 | if (likely(msg_user(m) != LINK_PROTOCOL)) |
1a20cc25 | 805 | return true; |
6e498158 JPM |
806 | if (msg_type(m) == STATE_MSG) |
807 | return true; | |
808 | return false; | |
d999297c JPM |
809 | } |
810 | ||
6e498158 | 811 | static inline bool msg_peer_node_is_up(struct tipc_msg *m) |
d999297c | 812 | { |
6e498158 JPM |
813 | if (msg_peer_link_is_up(m)) |
814 | return true; | |
1a20cc25 JPM |
815 | return msg_redundant_link(m); |
816 | } | |
817 | ||
5b7066c3 JPM |
818 | static inline bool msg_is_reset(struct tipc_msg *hdr) |
819 | { | |
820 | return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG); | |
821 | } | |
822 | ||
859fc7c0 | 823 | struct sk_buff *tipc_buf_acquire(u32 size); |
cf2157f8 | 824 | bool tipc_msg_validate(struct sk_buff *skb); |
bcd3ffd4 | 825 | bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err); |
c5898636 | 826 | void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type, |
34747539 | 827 | u32 hsize, u32 destnode); |
e3a77561 JPM |
828 | struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, |
829 | uint data_sz, u32 dnode, u32 onode, | |
830 | u32 dport, u32 oport, int errcode); | |
37e22164 | 831 | int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf); |
dd3f9e70 JPM |
832 | bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu); |
833 | bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg, | |
834 | u32 mtu, u32 dnode); | |
c637c103 | 835 | bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos); |
c5898636 | 836 | int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, |
34747539 | 837 | int offset, int dsz, int mtu, struct sk_buff_head *list); |
cda3696d | 838 | bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err); |
2f566124 | 839 | bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq); |
8306f99a JPM |
840 | void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno, |
841 | struct sk_buff *skb); | |
078bec82 | 842 | |
e4bf4f76 JPM |
843 | static inline u16 buf_seqno(struct sk_buff *skb) |
844 | { | |
845 | return msg_seqno(buf_msg(skb)); | |
846 | } | |
847 | ||
cb1b7280 JPM |
848 | /* tipc_skb_peek(): peek and reserve first buffer in list |
849 | * @list: list to be peeked in | |
850 | * Returns pointer to first buffer in list, if any | |
851 | */ | |
852 | static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list, | |
853 | spinlock_t *lock) | |
854 | { | |
855 | struct sk_buff *skb; | |
856 | ||
857 | spin_lock_bh(lock); | |
858 | skb = skb_peek(list); | |
859 | if (skb) | |
860 | skb_get(skb); | |
861 | spin_unlock_bh(lock); | |
862 | return skb; | |
863 | } | |
864 | ||
c637c103 JPM |
865 | /* tipc_skb_peek_port(): find a destination port, ignoring all destinations |
866 | * up to and including 'filter'. | |
867 | * Note: ignoring previously tried destinations minimizes the risk of | |
868 | * contention on the socket lock | |
869 | * @list: list to be peeked in | |
870 | * @filter: last destination to be ignored from search | |
871 | * Returns a destination port number, of applicable. | |
872 | */ | |
873 | static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter) | |
874 | { | |
875 | struct sk_buff *skb; | |
876 | u32 dport = 0; | |
877 | bool ignore = true; | |
878 | ||
879 | spin_lock_bh(&list->lock); | |
880 | skb_queue_walk(list, skb) { | |
881 | dport = msg_destport(buf_msg(skb)); | |
882 | if (!filter || skb_queue_is_last(list, skb)) | |
883 | break; | |
884 | if (dport == filter) | |
885 | ignore = false; | |
886 | else if (!ignore) | |
887 | break; | |
888 | } | |
889 | spin_unlock_bh(&list->lock); | |
890 | return dport; | |
891 | } | |
892 | ||
893 | /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list | |
894 | * @list: list to be unlinked from | |
895 | * @dport: selection criteria for buffer to unlink | |
896 | */ | |
897 | static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list, | |
898 | u32 dport) | |
899 | { | |
900 | struct sk_buff *_skb, *tmp, *skb = NULL; | |
901 | ||
902 | spin_lock_bh(&list->lock); | |
903 | skb_queue_walk_safe(list, _skb, tmp) { | |
904 | if (msg_destport(buf_msg(_skb)) == dport) { | |
905 | __skb_unlink(_skb, list); | |
906 | skb = _skb; | |
907 | break; | |
908 | } | |
909 | } | |
910 | spin_unlock_bh(&list->lock); | |
911 | return skb; | |
912 | } | |
913 | ||
598411d7 JPM |
914 | /* tipc_skb_queue_splice_tail - append an skb list to lock protected list |
915 | * @list: the new list to append. Not lock protected | |
916 | * @head: target list. Lock protected. | |
917 | */ | |
918 | static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list, | |
919 | struct sk_buff_head *head) | |
920 | { | |
921 | spin_lock_bh(&head->lock); | |
922 | skb_queue_splice_tail(list, head); | |
923 | spin_unlock_bh(&head->lock); | |
924 | } | |
925 | ||
926 | /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists | |
927 | * @list: the new list to add. Lock protected. Will be reinitialized | |
928 | * @head: target list. Lock protected. | |
929 | */ | |
930 | static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list, | |
931 | struct sk_buff_head *head) | |
932 | { | |
933 | struct sk_buff_head tmp; | |
934 | ||
935 | __skb_queue_head_init(&tmp); | |
936 | ||
937 | spin_lock_bh(&list->lock); | |
938 | skb_queue_splice_tail_init(list, &tmp); | |
939 | spin_unlock_bh(&list->lock); | |
940 | tipc_skb_queue_splice_tail(&tmp, head); | |
941 | } | |
942 | ||
b97bf3fd | 943 | #endif |