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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 | * |
75da2163 | 4 | * Copyright (c) 2000-2007, 2014-2017 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 | */ |
75da2163 JM |
64 | #define TIPC_CONN_MSG 0 |
65 | #define TIPC_MCAST_MSG 1 | |
66 | #define TIPC_NAMED_MSG 2 | |
67 | #define TIPC_DIRECT_MSG 3 | |
ae236fb2 JM |
68 | #define TIPC_GRP_MEMBER_EVT 4 |
69 | #define TIPC_GRP_BCAST_MSG 5 | |
5b8dddb6 JM |
70 | #define TIPC_GRP_MCAST_MSG 6 |
71 | #define TIPC_GRP_UCAST_MSG 7 | |
d265fef6 | 72 | |
e3eea1eb JPM |
73 | /* |
74 | * Internal message users | |
75 | */ | |
76 | #define BCAST_PROTOCOL 5 | |
77 | #define MSG_BUNDLER 6 | |
78 | #define LINK_PROTOCOL 7 | |
79 | #define CONN_MANAGER 8 | |
75da2163 | 80 | #define GROUP_PROTOCOL 9 |
dff29b1a | 81 | #define TUNNEL_PROTOCOL 10 |
e3eea1eb JPM |
82 | #define NAME_DISTRIBUTOR 11 |
83 | #define MSG_FRAGMENTER 12 | |
84 | #define LINK_CONFIG 13 | |
85 | #define SOCK_WAKEUP 14 /* pseudo user */ | |
14c04493 | 86 | #define TOP_SRV 15 /* pseudo user */ |
e3eea1eb | 87 | |
cc4c4353 AS |
88 | /* |
89 | * Message header sizes | |
90 | */ | |
741d9eb7 AS |
91 | #define SHORT_H_SIZE 24 /* In-cluster basic payload message */ |
92 | #define BASIC_H_SIZE 32 /* Basic payload message */ | |
93 | #define NAMED_H_SIZE 40 /* Named payload message */ | |
94 | #define MCAST_H_SIZE 44 /* Multicast payload message */ | |
75da2163 | 95 | #define GROUP_H_SIZE 44 /* Group payload message */ |
06d82c91 AS |
96 | #define INT_H_SIZE 40 /* Internal messages */ |
97 | #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */ | |
98 | #define MAX_H_SIZE 60 /* Largest possible TIPC header size */ | |
99 | ||
b97bf3fd | 100 | #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) |
4c94cc2d | 101 | #define FB_MTU 3744 |
91e2eb56 | 102 | #define TIPC_MEDIA_INFO_OFFSET 5 |
3d749a6a | 103 | |
859fc7c0 | 104 | struct tipc_skb_cb { |
ba8aebe9 | 105 | u32 bytes_read; |
31c82a2d | 106 | u32 orig_member; |
859fc7c0 | 107 | struct sk_buff *tail; |
31c4f4cc | 108 | unsigned long nxt_retr; |
cf2157f8 | 109 | bool validated; |
859fc7c0 | 110 | u16 chain_imp; |
c1ab3f1d | 111 | u16 ackers; |
859fc7c0 YX |
112 | }; |
113 | ||
114 | #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0])) | |
115 | ||
d265fef6 AS |
116 | struct tipc_msg { |
117 | __be32 hdr[15]; | |
118 | }; | |
c4307285 | 119 | |
859fc7c0 YX |
120 | static inline struct tipc_msg *buf_msg(struct sk_buff *skb) |
121 | { | |
122 | return (struct tipc_msg *)skb->data; | |
123 | } | |
124 | ||
d265fef6 AS |
125 | static inline u32 msg_word(struct tipc_msg *m, u32 pos) |
126 | { | |
127 | return ntohl(m->hdr[pos]); | |
128 | } | |
b97bf3fd PL |
129 | |
130 | static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) | |
131 | { | |
132 | m->hdr[w] = htonl(val); | |
133 | } | |
134 | ||
d265fef6 AS |
135 | static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask) |
136 | { | |
137 | return (msg_word(m, w) >> pos) & mask; | |
138 | } | |
139 | ||
b97bf3fd PL |
140 | static inline void msg_set_bits(struct tipc_msg *m, u32 w, |
141 | u32 pos, u32 mask, u32 val) | |
142 | { | |
1f9eda7e | 143 | val = (val & mask) << pos; |
becf3da2 AV |
144 | mask = mask << pos; |
145 | m->hdr[w] &= ~htonl(mask); | |
146 | m->hdr[w] |= htonl(val); | |
b97bf3fd PL |
147 | } |
148 | ||
40aecb1b AS |
149 | static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b) |
150 | { | |
151 | u32 temp = msg->hdr[a]; | |
152 | ||
153 | msg->hdr[a] = msg->hdr[b]; | |
154 | msg->hdr[b] = temp; | |
155 | } | |
156 | ||
c4307285 | 157 | /* |
b97bf3fd PL |
158 | * Word 0 |
159 | */ | |
b97bf3fd PL |
160 | static inline u32 msg_version(struct tipc_msg *m) |
161 | { | |
162 | return msg_bits(m, 0, 29, 7); | |
163 | } | |
164 | ||
c4307285 | 165 | static inline void msg_set_version(struct tipc_msg *m) |
b97bf3fd | 166 | { |
37695420 | 167 | msg_set_bits(m, 0, 29, 7, TIPC_VERSION); |
b97bf3fd PL |
168 | } |
169 | ||
170 | static inline u32 msg_user(struct tipc_msg *m) | |
171 | { | |
172 | return msg_bits(m, 0, 25, 0xf); | |
173 | } | |
174 | ||
175 | static inline u32 msg_isdata(struct tipc_msg *m) | |
176 | { | |
a02cec21 | 177 | return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE; |
b97bf3fd PL |
178 | } |
179 | ||
c4307285 | 180 | static inline void msg_set_user(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
181 | { |
182 | msg_set_bits(m, 0, 25, 0xf, n); | |
183 | } | |
184 | ||
d265fef6 AS |
185 | static inline u32 msg_hdr_sz(struct tipc_msg *m) |
186 | { | |
187 | return msg_bits(m, 0, 21, 0xf) << 2; | |
188 | } | |
189 | ||
0e65967e | 190 | static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
191 | { |
192 | msg_set_bits(m, 0, 21, 0xf, n>>2); | |
193 | } | |
194 | ||
d265fef6 AS |
195 | static inline u32 msg_size(struct tipc_msg *m) |
196 | { | |
197 | return msg_bits(m, 0, 0, 0x1ffff); | |
198 | } | |
199 | ||
5b8dddb6 JM |
200 | static inline u32 msg_blocks(struct tipc_msg *m) |
201 | { | |
202 | return (msg_size(m) / 1024) + 1; | |
203 | } | |
204 | ||
d265fef6 AS |
205 | static inline u32 msg_data_sz(struct tipc_msg *m) |
206 | { | |
207 | return msg_size(m) - msg_hdr_sz(m); | |
208 | } | |
209 | ||
c4307285 | 210 | static inline int msg_non_seq(struct tipc_msg *m) |
b97bf3fd PL |
211 | { |
212 | return msg_bits(m, 0, 20, 1); | |
213 | } | |
214 | ||
40aecb1b | 215 | static inline void msg_set_non_seq(struct tipc_msg *m, u32 n) |
b97bf3fd | 216 | { |
40aecb1b | 217 | msg_set_bits(m, 0, 20, 1, n); |
b97bf3fd PL |
218 | } |
219 | ||
25b9221b JM |
220 | static inline int msg_is_syn(struct tipc_msg *m) |
221 | { | |
222 | return msg_bits(m, 0, 17, 1); | |
223 | } | |
224 | ||
225 | static inline void msg_set_syn(struct tipc_msg *m, u32 d) | |
226 | { | |
227 | msg_set_bits(m, 0, 17, 1, d); | |
228 | } | |
229 | ||
c4307285 | 230 | static inline int msg_dest_droppable(struct tipc_msg *m) |
b97bf3fd PL |
231 | { |
232 | return msg_bits(m, 0, 19, 1); | |
233 | } | |
234 | ||
c4307285 | 235 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
236 | { |
237 | msg_set_bits(m, 0, 19, 1, d); | |
238 | } | |
239 | ||
8d6e79d3 JM |
240 | static inline int msg_is_keepalive(struct tipc_msg *m) |
241 | { | |
242 | return msg_bits(m, 0, 19, 1); | |
243 | } | |
244 | ||
245 | static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d) | |
246 | { | |
247 | msg_set_bits(m, 0, 19, 1, d); | |
248 | } | |
249 | ||
c4307285 | 250 | static inline int msg_src_droppable(struct tipc_msg *m) |
b97bf3fd PL |
251 | { |
252 | return msg_bits(m, 0, 18, 1); | |
253 | } | |
254 | ||
c4307285 | 255 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
256 | { |
257 | msg_set_bits(m, 0, 18, 1, d); | |
258 | } | |
259 | ||
260 | static inline void msg_set_size(struct tipc_msg *m, u32 sz) | |
261 | { | |
262 | m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); | |
263 | } | |
264 | ||
3127a020 JPM |
265 | static inline unchar *msg_data(struct tipc_msg *m) |
266 | { | |
267 | return ((unchar *)m) + msg_hdr_sz(m); | |
268 | } | |
269 | ||
270 | static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m) | |
271 | { | |
272 | return (struct tipc_msg *)msg_data(m); | |
273 | } | |
b97bf3fd | 274 | |
c4307285 | 275 | /* |
b97bf3fd PL |
276 | * Word 1 |
277 | */ | |
d265fef6 AS |
278 | static inline u32 msg_type(struct tipc_msg *m) |
279 | { | |
280 | return msg_bits(m, 1, 29, 0x7); | |
281 | } | |
282 | ||
c4307285 | 283 | static inline void msg_set_type(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
284 | { |
285 | msg_set_bits(m, 1, 29, 0x7, n); | |
286 | } | |
287 | ||
75da2163 JM |
288 | static inline int msg_in_group(struct tipc_msg *m) |
289 | { | |
ae236fb2 JM |
290 | int mtyp = msg_type(m); |
291 | ||
27bd9ec0 | 292 | return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG; |
ae236fb2 JM |
293 | } |
294 | ||
295 | static inline bool msg_is_grp_evt(struct tipc_msg *m) | |
296 | { | |
297 | return msg_type(m) == TIPC_GRP_MEMBER_EVT; | |
75da2163 JM |
298 | } |
299 | ||
d265fef6 AS |
300 | static inline u32 msg_named(struct tipc_msg *m) |
301 | { | |
302 | return msg_type(m) == TIPC_NAMED_MSG; | |
303 | } | |
304 | ||
305 | static inline u32 msg_mcast(struct tipc_msg *m) | |
306 | { | |
75da2163 JM |
307 | int mtyp = msg_type(m); |
308 | ||
5b8dddb6 JM |
309 | return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) || |
310 | (mtyp == TIPC_GRP_MCAST_MSG)); | |
d265fef6 AS |
311 | } |
312 | ||
313 | static inline u32 msg_connected(struct tipc_msg *m) | |
314 | { | |
315 | return msg_type(m) == TIPC_CONN_MSG; | |
316 | } | |
317 | ||
318 | static inline u32 msg_errcode(struct tipc_msg *m) | |
319 | { | |
320 | return msg_bits(m, 1, 25, 0xf); | |
321 | } | |
322 | ||
c4307285 | 323 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
b97bf3fd PL |
324 | { |
325 | msg_set_bits(m, 1, 25, 0xf, err); | |
326 | } | |
327 | ||
c4307285 | 328 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
329 | { |
330 | return msg_bits(m, 1, 21, 0xf); | |
331 | } | |
332 | ||
c4307285 | 333 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
334 | { |
335 | msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); | |
336 | } | |
337 | ||
c4307285 | 338 | static inline void msg_reset_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
339 | { |
340 | msg_set_bits(m, 1, 21, 0xf, 0); | |
341 | } | |
342 | ||
343 | static inline u32 msg_lookup_scope(struct tipc_msg *m) | |
344 | { | |
345 | return msg_bits(m, 1, 19, 0x3); | |
346 | } | |
347 | ||
c4307285 | 348 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
349 | { |
350 | msg_set_bits(m, 1, 19, 0x3, n); | |
351 | } | |
352 | ||
e4bf4f76 | 353 | static inline u16 msg_bcast_ack(struct tipc_msg *m) |
b97bf3fd PL |
354 | { |
355 | return msg_bits(m, 1, 0, 0xffff); | |
356 | } | |
357 | ||
e4bf4f76 | 358 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
359 | { |
360 | msg_set_bits(m, 1, 0, 0xffff, n); | |
361 | } | |
362 | ||
91986ee1 TL |
363 | /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch |
364 | * link peer session number | |
365 | */ | |
366 | static inline bool msg_dest_session_valid(struct tipc_msg *m) | |
367 | { | |
368 | return msg_bits(m, 1, 16, 0x1); | |
369 | } | |
370 | ||
371 | static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid) | |
372 | { | |
373 | msg_set_bits(m, 1, 16, 0x1, valid); | |
374 | } | |
375 | ||
376 | static inline u16 msg_dest_session(struct tipc_msg *m) | |
377 | { | |
378 | return msg_bits(m, 1, 0, 0xffff); | |
379 | } | |
380 | ||
381 | static inline void msg_set_dest_session(struct tipc_msg *m, u16 n) | |
382 | { | |
383 | msg_set_bits(m, 1, 0, 0xffff, n); | |
384 | } | |
b97bf3fd | 385 | |
c4307285 | 386 | /* |
b97bf3fd PL |
387 | * Word 2 |
388 | */ | |
e4bf4f76 | 389 | static inline u16 msg_ack(struct tipc_msg *m) |
b97bf3fd PL |
390 | { |
391 | return msg_bits(m, 2, 16, 0xffff); | |
392 | } | |
393 | ||
e4bf4f76 | 394 | static inline void msg_set_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
395 | { |
396 | msg_set_bits(m, 2, 16, 0xffff, n); | |
397 | } | |
398 | ||
e4bf4f76 | 399 | static inline u16 msg_seqno(struct tipc_msg *m) |
b97bf3fd PL |
400 | { |
401 | return msg_bits(m, 2, 0, 0xffff); | |
402 | } | |
403 | ||
e4bf4f76 | 404 | static inline void msg_set_seqno(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
405 | { |
406 | msg_set_bits(m, 2, 0, 0xffff, n); | |
407 | } | |
408 | ||
c4307285 | 409 | /* |
b97bf3fd PL |
410 | * Words 3-10 |
411 | */ | |
e3eea1eb JPM |
412 | static inline u32 msg_importance(struct tipc_msg *m) |
413 | { | |
f21e897e JPM |
414 | int usr = msg_user(m); |
415 | ||
416 | if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m))) | |
417 | return usr; | |
418 | if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)) | |
dde4b5ae | 419 | return msg_bits(m, 9, 0, 0x7); |
e3eea1eb JPM |
420 | return TIPC_SYSTEM_IMPORTANCE; |
421 | } | |
422 | ||
423 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) | |
424 | { | |
f21e897e JPM |
425 | int usr = msg_user(m); |
426 | ||
427 | if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))) | |
dde4b5ae | 428 | msg_set_bits(m, 9, 0, 0x7, i); |
f21e897e | 429 | else if (i < TIPC_SYSTEM_IMPORTANCE) |
e3eea1eb JPM |
430 | msg_set_user(m, i); |
431 | else | |
432 | pr_warn("Trying to set illegal importance in message\n"); | |
433 | } | |
434 | ||
d265fef6 AS |
435 | static inline u32 msg_prevnode(struct tipc_msg *m) |
436 | { | |
437 | return msg_word(m, 3); | |
438 | } | |
439 | ||
c4307285 | 440 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
441 | { |
442 | msg_set_word(m, 3, a); | |
443 | } | |
444 | ||
d265fef6 AS |
445 | static inline u32 msg_origport(struct tipc_msg *m) |
446 | { | |
3127a020 JPM |
447 | if (msg_user(m) == MSG_FRAGMENTER) |
448 | m = msg_get_wrapped(m); | |
d265fef6 AS |
449 | return msg_word(m, 4); |
450 | } | |
451 | ||
c4307285 | 452 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
453 | { |
454 | msg_set_word(m, 4, p); | |
455 | } | |
456 | ||
d265fef6 AS |
457 | static inline u32 msg_destport(struct tipc_msg *m) |
458 | { | |
459 | return msg_word(m, 5); | |
460 | } | |
461 | ||
c4307285 | 462 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
463 | { |
464 | msg_set_word(m, 5, p); | |
465 | } | |
466 | ||
d265fef6 AS |
467 | static inline u32 msg_mc_netid(struct tipc_msg *m) |
468 | { | |
469 | return msg_word(m, 5); | |
470 | } | |
471 | ||
c4307285 | 472 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
473 | { |
474 | msg_set_word(m, 5, p); | |
475 | } | |
476 | ||
d265fef6 AS |
477 | static inline int msg_short(struct tipc_msg *m) |
478 | { | |
741d9eb7 | 479 | return msg_hdr_sz(m) == SHORT_H_SIZE; |
d265fef6 AS |
480 | } |
481 | ||
482 | static inline u32 msg_orignode(struct tipc_msg *m) | |
483 | { | |
484 | if (likely(msg_short(m))) | |
485 | return msg_prevnode(m); | |
486 | return msg_word(m, 6); | |
487 | } | |
488 | ||
c4307285 | 489 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
490 | { |
491 | msg_set_word(m, 6, a); | |
492 | } | |
493 | ||
d265fef6 AS |
494 | static inline u32 msg_destnode(struct tipc_msg *m) |
495 | { | |
496 | return msg_word(m, 7); | |
497 | } | |
498 | ||
c4307285 | 499 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
500 | { |
501 | msg_set_word(m, 7, a); | |
502 | } | |
503 | ||
d265fef6 AS |
504 | static inline u32 msg_nametype(struct tipc_msg *m) |
505 | { | |
506 | return msg_word(m, 8); | |
507 | } | |
508 | ||
c4307285 | 509 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
510 | { |
511 | msg_set_word(m, 8, n); | |
512 | } | |
513 | ||
d265fef6 AS |
514 | static inline u32 msg_nameinst(struct tipc_msg *m) |
515 | { | |
516 | return msg_word(m, 9); | |
517 | } | |
518 | ||
519 | static inline u32 msg_namelower(struct tipc_msg *m) | |
520 | { | |
521 | return msg_nameinst(m); | |
522 | } | |
523 | ||
c4307285 | 524 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
525 | { |
526 | msg_set_word(m, 9, n); | |
527 | } | |
528 | ||
c4307285 | 529 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
530 | { |
531 | msg_set_namelower(m, n); | |
532 | } | |
533 | ||
d265fef6 AS |
534 | static inline u32 msg_nameupper(struct tipc_msg *m) |
535 | { | |
536 | return msg_word(m, 10); | |
537 | } | |
538 | ||
c4307285 | 539 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
540 | { |
541 | msg_set_word(m, 10, n); | |
542 | } | |
543 | ||
b97bf3fd | 544 | /* |
cc4c4353 AS |
545 | * Constants and routines used to read and write TIPC internal message headers |
546 | */ | |
b97bf3fd | 547 | |
c4307285 | 548 | /* |
cc4c4353 | 549 | * Connection management protocol message types |
b97bf3fd | 550 | */ |
b97bf3fd PL |
551 | #define CONN_PROBE 0 |
552 | #define CONN_PROBE_REPLY 1 | |
553 | #define CONN_ACK 2 | |
554 | ||
c4307285 | 555 | /* |
cc4c4353 | 556 | * Name distributor message types |
b97bf3fd | 557 | */ |
b97bf3fd PL |
558 | #define PUBLICATION 0 |
559 | #define WITHDRAWAL 1 | |
560 | ||
92138d1f AS |
561 | /* |
562 | * Segmentation message types | |
563 | */ | |
92138d1f AS |
564 | #define FIRST_FRAGMENT 0 |
565 | #define FRAGMENT 1 | |
566 | #define LAST_FRAGMENT 2 | |
567 | ||
568 | /* | |
569 | * Link management protocol message types | |
570 | */ | |
92138d1f AS |
571 | #define STATE_MSG 0 |
572 | #define RESET_MSG 1 | |
573 | #define ACTIVATE_MSG 2 | |
574 | ||
575 | /* | |
576 | * Changeover tunnel message types | |
577 | */ | |
dff29b1a JPM |
578 | #define SYNCH_MSG 0 |
579 | #define FAILOVER_MSG 1 | |
92138d1f AS |
580 | |
581 | /* | |
582 | * Config protocol message types | |
583 | */ | |
92138d1f AS |
584 | #define DSC_REQ_MSG 0 |
585 | #define DSC_RESP_MSG 1 | |
25b0b9c4 JM |
586 | #define DSC_TRIAL_MSG 2 |
587 | #define DSC_TRIAL_FAIL_MSG 3 | |
92138d1f | 588 | |
75da2163 JM |
589 | /* |
590 | * Group protocol message types | |
591 | */ | |
592 | #define GRP_JOIN_MSG 0 | |
593 | #define GRP_LEAVE_MSG 1 | |
b7d42635 | 594 | #define GRP_ADV_MSG 2 |
2f487712 | 595 | #define GRP_ACK_MSG 3 |
04d7b574 JM |
596 | #define GRP_RECLAIM_MSG 4 |
597 | #define GRP_REMIT_MSG 5 | |
75da2163 | 598 | |
c4307285 | 599 | /* |
b97bf3fd PL |
600 | * Word 1 |
601 | */ | |
b97bf3fd PL |
602 | static inline u32 msg_seq_gap(struct tipc_msg *m) |
603 | { | |
bd784533 | 604 | return msg_bits(m, 1, 16, 0x1fff); |
b97bf3fd PL |
605 | } |
606 | ||
607 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) | |
608 | { | |
bd784533 | 609 | msg_set_bits(m, 1, 16, 0x1fff, n); |
b97bf3fd PL |
610 | } |
611 | ||
fc0eea69 AS |
612 | static inline u32 msg_node_sig(struct tipc_msg *m) |
613 | { | |
614 | return msg_bits(m, 1, 0, 0xffff); | |
615 | } | |
616 | ||
617 | static inline void msg_set_node_sig(struct tipc_msg *m, u32 n) | |
618 | { | |
619 | msg_set_bits(m, 1, 0, 0xffff, n); | |
620 | } | |
621 | ||
7764d6e8 JPM |
622 | static inline u32 msg_node_capabilities(struct tipc_msg *m) |
623 | { | |
624 | return msg_bits(m, 1, 15, 0x1fff); | |
625 | } | |
626 | ||
627 | static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n) | |
628 | { | |
629 | msg_set_bits(m, 1, 15, 0x1fff, n); | |
630 | } | |
631 | ||
c4307285 | 632 | /* |
b97bf3fd PL |
633 | * Word 2 |
634 | */ | |
b97bf3fd PL |
635 | static inline u32 msg_dest_domain(struct tipc_msg *m) |
636 | { | |
637 | return msg_word(m, 2); | |
638 | } | |
639 | ||
c4307285 | 640 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
641 | { |
642 | msg_set_word(m, 2, n); | |
643 | } | |
644 | ||
645 | static inline u32 msg_bcgap_after(struct tipc_msg *m) | |
646 | { | |
647 | return msg_bits(m, 2, 16, 0xffff); | |
648 | } | |
649 | ||
650 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) | |
651 | { | |
652 | msg_set_bits(m, 2, 16, 0xffff, n); | |
653 | } | |
654 | ||
655 | static inline u32 msg_bcgap_to(struct tipc_msg *m) | |
656 | { | |
657 | return msg_bits(m, 2, 0, 0xffff); | |
658 | } | |
659 | ||
c4307285 | 660 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
661 | { |
662 | msg_set_bits(m, 2, 0, 0xffff, n); | |
663 | } | |
664 | ||
c4307285 | 665 | /* |
b97bf3fd PL |
666 | * Word 4 |
667 | */ | |
b97bf3fd PL |
668 | static inline u32 msg_last_bcast(struct tipc_msg *m) |
669 | { | |
670 | return msg_bits(m, 4, 16, 0xffff); | |
671 | } | |
672 | ||
52666986 JPM |
673 | static inline u32 msg_bc_snd_nxt(struct tipc_msg *m) |
674 | { | |
675 | return msg_last_bcast(m) + 1; | |
676 | } | |
677 | ||
b97bf3fd PL |
678 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) |
679 | { | |
680 | msg_set_bits(m, 4, 16, 0xffff, n); | |
681 | } | |
682 | ||
b97bf3fd PL |
683 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) |
684 | { | |
685 | msg_set_bits(m, 4, 16, 0xffff, n); | |
686 | } | |
687 | ||
688 | ||
6e498158 | 689 | static inline u16 msg_next_sent(struct tipc_msg *m) |
b97bf3fd PL |
690 | { |
691 | return msg_bits(m, 4, 0, 0xffff); | |
692 | } | |
693 | ||
6e498158 | 694 | static inline void msg_set_next_sent(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
695 | { |
696 | msg_set_bits(m, 4, 0, 0xffff, n); | |
697 | } | |
698 | ||
b97bf3fd PL |
699 | static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) |
700 | { | |
701 | msg_set_bits(m, 4, 0, 0xffff, n); | |
702 | } | |
703 | ||
704 | static inline u32 msg_bc_netid(struct tipc_msg *m) | |
705 | { | |
706 | return msg_word(m, 4); | |
707 | } | |
708 | ||
709 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) | |
710 | { | |
711 | msg_set_word(m, 4, id); | |
712 | } | |
713 | ||
714 | static inline u32 msg_link_selector(struct tipc_msg *m) | |
715 | { | |
a853e4c6 JPM |
716 | if (msg_user(m) == MSG_FRAGMENTER) |
717 | m = (void *)msg_data(m); | |
b97bf3fd PL |
718 | return msg_bits(m, 4, 0, 1); |
719 | } | |
720 | ||
c4307285 | 721 | /* |
b97bf3fd PL |
722 | * Word 5 |
723 | */ | |
d999297c | 724 | static inline u16 msg_session(struct tipc_msg *m) |
b97bf3fd PL |
725 | { |
726 | return msg_bits(m, 5, 16, 0xffff); | |
727 | } | |
728 | ||
d999297c | 729 | static inline void msg_set_session(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
730 | { |
731 | msg_set_bits(m, 5, 16, 0xffff, n); | |
732 | } | |
733 | ||
734 | static inline u32 msg_probe(struct tipc_msg *m) | |
735 | { | |
736 | return msg_bits(m, 5, 0, 1); | |
737 | } | |
738 | ||
739 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) | |
740 | { | |
7eb878ed | 741 | msg_set_bits(m, 5, 0, 1, val); |
b97bf3fd PL |
742 | } |
743 | ||
744 | static inline char msg_net_plane(struct tipc_msg *m) | |
745 | { | |
746 | return msg_bits(m, 5, 1, 7) + 'A'; | |
747 | } | |
748 | ||
749 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) | |
750 | { | |
751 | msg_set_bits(m, 5, 1, 7, (n - 'A')); | |
752 | } | |
753 | ||
754 | static inline u32 msg_linkprio(struct tipc_msg *m) | |
755 | { | |
756 | return msg_bits(m, 5, 4, 0x1f); | |
757 | } | |
758 | ||
759 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) | |
760 | { | |
761 | msg_set_bits(m, 5, 4, 0x1f, n); | |
762 | } | |
763 | ||
764 | static inline u32 msg_bearer_id(struct tipc_msg *m) | |
765 | { | |
766 | return msg_bits(m, 5, 9, 0x7); | |
767 | } | |
768 | ||
769 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) | |
770 | { | |
771 | msg_set_bits(m, 5, 9, 0x7, n); | |
772 | } | |
773 | ||
774 | static inline u32 msg_redundant_link(struct tipc_msg *m) | |
775 | { | |
776 | return msg_bits(m, 5, 12, 0x1); | |
777 | } | |
778 | ||
77f167fc | 779 | static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r) |
b97bf3fd | 780 | { |
77f167fc | 781 | msg_set_bits(m, 5, 12, 0x1, r); |
b97bf3fd PL |
782 | } |
783 | ||
634696b1 JPM |
784 | static inline u32 msg_peer_stopping(struct tipc_msg *m) |
785 | { | |
786 | return msg_bits(m, 5, 13, 0x1); | |
787 | } | |
788 | ||
789 | static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s) | |
790 | { | |
791 | msg_set_bits(m, 5, 13, 0x1, s); | |
792 | } | |
793 | ||
06bd2b1e JPM |
794 | static inline bool msg_bc_ack_invalid(struct tipc_msg *m) |
795 | { | |
796 | switch (msg_user(m)) { | |
797 | case BCAST_PROTOCOL: | |
798 | case NAME_DISTRIBUTOR: | |
799 | case LINK_PROTOCOL: | |
800 | return msg_bits(m, 5, 14, 0x1); | |
801 | default: | |
802 | return false; | |
803 | } | |
804 | } | |
805 | ||
806 | static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid) | |
807 | { | |
808 | msg_set_bits(m, 5, 14, 0x1, invalid); | |
809 | } | |
810 | ||
3d749a6a AS |
811 | static inline char *msg_media_addr(struct tipc_msg *m) |
812 | { | |
91e2eb56 | 813 | return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET]; |
3d749a6a | 814 | } |
b97bf3fd | 815 | |
02d11ca2 JPM |
816 | static inline u32 msg_bc_gap(struct tipc_msg *m) |
817 | { | |
818 | return msg_bits(m, 8, 0, 0x3ff); | |
819 | } | |
820 | ||
821 | static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n) | |
822 | { | |
823 | msg_set_bits(m, 8, 0, 0x3ff, n); | |
824 | } | |
825 | ||
c4307285 | 826 | /* |
b97bf3fd PL |
827 | * Word 9 |
828 | */ | |
6e498158 | 829 | static inline u16 msg_msgcnt(struct tipc_msg *m) |
b97bf3fd PL |
830 | { |
831 | return msg_bits(m, 9, 16, 0xffff); | |
832 | } | |
833 | ||
6e498158 | 834 | static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
835 | { |
836 | msg_set_bits(m, 9, 16, 0xffff, n); | |
837 | } | |
838 | ||
10724cc7 | 839 | static inline u32 msg_conn_ack(struct tipc_msg *m) |
b97bf3fd PL |
840 | { |
841 | return msg_bits(m, 9, 16, 0xffff); | |
842 | } | |
843 | ||
10724cc7 | 844 | static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
845 | { |
846 | msg_set_bits(m, 9, 16, 0xffff, n); | |
847 | } | |
848 | ||
b7d42635 | 849 | static inline u16 msg_adv_win(struct tipc_msg *m) |
10724cc7 JPM |
850 | { |
851 | return msg_bits(m, 9, 0, 0xffff); | |
852 | } | |
853 | ||
b7d42635 | 854 | static inline void msg_set_adv_win(struct tipc_msg *m, u16 n) |
10724cc7 JPM |
855 | { |
856 | msg_set_bits(m, 9, 0, 0xffff, n); | |
857 | } | |
858 | ||
c4307285 | 859 | static inline u32 msg_max_pkt(struct tipc_msg *m) |
b97bf3fd | 860 | { |
a02cec21 | 861 | return msg_bits(m, 9, 16, 0xffff) * 4; |
b97bf3fd PL |
862 | } |
863 | ||
c4307285 | 864 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
865 | { |
866 | msg_set_bits(m, 9, 16, 0xffff, (n / 4)); | |
867 | } | |
868 | ||
869 | static inline u32 msg_link_tolerance(struct tipc_msg *m) | |
870 | { | |
871 | return msg_bits(m, 9, 0, 0xffff); | |
872 | } | |
873 | ||
874 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) | |
875 | { | |
876 | msg_set_bits(m, 9, 0, 0xffff, n); | |
877 | } | |
878 | ||
75da2163 JM |
879 | static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m) |
880 | { | |
881 | return msg_bits(m, 9, 16, 0xffff); | |
882 | } | |
883 | ||
884 | static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n) | |
885 | { | |
886 | msg_set_bits(m, 9, 16, 0xffff, n); | |
887 | } | |
888 | ||
2f487712 JM |
889 | static inline u16 msg_grp_bc_acked(struct tipc_msg *m) |
890 | { | |
891 | return msg_bits(m, 9, 16, 0xffff); | |
892 | } | |
893 | ||
894 | static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n) | |
895 | { | |
896 | msg_set_bits(m, 9, 16, 0xffff, n); | |
897 | } | |
898 | ||
04d7b574 JM |
899 | static inline u16 msg_grp_remitted(struct tipc_msg *m) |
900 | { | |
901 | return msg_bits(m, 9, 16, 0xffff); | |
902 | } | |
903 | ||
904 | static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n) | |
905 | { | |
906 | msg_set_bits(m, 9, 16, 0xffff, n); | |
907 | } | |
908 | ||
75da2163 JM |
909 | /* Word 10 |
910 | */ | |
ae236fb2 JM |
911 | static inline u16 msg_grp_evt(struct tipc_msg *m) |
912 | { | |
913 | return msg_bits(m, 10, 0, 0x3); | |
914 | } | |
915 | ||
916 | static inline void msg_set_grp_evt(struct tipc_msg *m, int n) | |
917 | { | |
918 | msg_set_bits(m, 10, 0, 0x3, n); | |
919 | } | |
920 | ||
2f487712 JM |
921 | static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m) |
922 | { | |
923 | return msg_bits(m, 10, 0, 0x1); | |
924 | } | |
925 | ||
926 | static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n) | |
927 | { | |
928 | msg_set_bits(m, 10, 0, 0x1, n); | |
929 | } | |
930 | ||
75da2163 JM |
931 | static inline u16 msg_grp_bc_seqno(struct tipc_msg *m) |
932 | { | |
933 | return msg_bits(m, 10, 16, 0xffff); | |
934 | } | |
935 | ||
936 | static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n) | |
937 | { | |
938 | msg_set_bits(m, 10, 16, 0xffff, n); | |
939 | } | |
940 | ||
6e498158 | 941 | static inline bool msg_peer_link_is_up(struct tipc_msg *m) |
1a20cc25 | 942 | { |
d999297c | 943 | if (likely(msg_user(m) != LINK_PROTOCOL)) |
1a20cc25 | 944 | return true; |
6e498158 JPM |
945 | if (msg_type(m) == STATE_MSG) |
946 | return true; | |
947 | return false; | |
d999297c JPM |
948 | } |
949 | ||
6e498158 | 950 | static inline bool msg_peer_node_is_up(struct tipc_msg *m) |
d999297c | 951 | { |
6e498158 JPM |
952 | if (msg_peer_link_is_up(m)) |
953 | return true; | |
1a20cc25 JPM |
954 | return msg_redundant_link(m); |
955 | } | |
956 | ||
5b7066c3 JPM |
957 | static inline bool msg_is_reset(struct tipc_msg *hdr) |
958 | { | |
959 | return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG); | |
960 | } | |
961 | ||
25b0b9c4 JM |
962 | static inline u32 msg_sugg_node_addr(struct tipc_msg *m) |
963 | { | |
964 | return msg_word(m, 14); | |
965 | } | |
966 | ||
967 | static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n) | |
968 | { | |
969 | msg_set_word(m, 14, n); | |
970 | } | |
971 | ||
972 | static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id) | |
973 | { | |
974 | memcpy(msg_data(hdr), id, 16); | |
975 | } | |
976 | ||
977 | static inline u8 *msg_node_id(struct tipc_msg *hdr) | |
978 | { | |
979 | return (u8 *)msg_data(hdr); | |
980 | } | |
981 | ||
57d5f64d | 982 | struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp); |
d618d09a | 983 | bool tipc_msg_validate(struct sk_buff **_skb); |
bcd3ffd4 | 984 | bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err); |
64ac5f59 JM |
985 | void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb, |
986 | struct sk_buff_head *xmitq); | |
c5898636 | 987 | void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type, |
34747539 | 988 | u32 hsize, u32 destnode); |
e3a77561 JPM |
989 | struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, |
990 | uint data_sz, u32 dnode, u32 onode, | |
991 | u32 dport, u32 oport, int errcode); | |
37e22164 | 992 | int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf); |
dd3f9e70 JPM |
993 | bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu); |
994 | bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg, | |
995 | u32 mtu, u32 dnode); | |
c637c103 | 996 | bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos); |
c5898636 | 997 | int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, |
34747539 | 998 | int offset, int dsz, int mtu, struct sk_buff_head *list); |
cda3696d | 999 | bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err); |
4c94cc2d | 1000 | bool tipc_msg_assemble(struct sk_buff_head *list); |
2f566124 | 1001 | bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq); |
a853e4c6 JPM |
1002 | bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg, |
1003 | struct sk_buff_head *cpy); | |
8306f99a JPM |
1004 | void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno, |
1005 | struct sk_buff *skb); | |
67879274 | 1006 | bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy); |
078bec82 | 1007 | |
e4bf4f76 JPM |
1008 | static inline u16 buf_seqno(struct sk_buff *skb) |
1009 | { | |
1010 | return msg_seqno(buf_msg(skb)); | |
1011 | } | |
1012 | ||
d618d09a JM |
1013 | static inline int buf_roundup_len(struct sk_buff *skb) |
1014 | { | |
1015 | return (skb->len / 1024 + 1) * 1024; | |
1016 | } | |
1017 | ||
cb1b7280 JPM |
1018 | /* tipc_skb_peek(): peek and reserve first buffer in list |
1019 | * @list: list to be peeked in | |
1020 | * Returns pointer to first buffer in list, if any | |
1021 | */ | |
1022 | static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list, | |
1023 | spinlock_t *lock) | |
1024 | { | |
1025 | struct sk_buff *skb; | |
1026 | ||
1027 | spin_lock_bh(lock); | |
1028 | skb = skb_peek(list); | |
1029 | if (skb) | |
1030 | skb_get(skb); | |
1031 | spin_unlock_bh(lock); | |
1032 | return skb; | |
1033 | } | |
1034 | ||
c637c103 JPM |
1035 | /* tipc_skb_peek_port(): find a destination port, ignoring all destinations |
1036 | * up to and including 'filter'. | |
1037 | * Note: ignoring previously tried destinations minimizes the risk of | |
1038 | * contention on the socket lock | |
1039 | * @list: list to be peeked in | |
1040 | * @filter: last destination to be ignored from search | |
1041 | * Returns a destination port number, of applicable. | |
1042 | */ | |
1043 | static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter) | |
1044 | { | |
1045 | struct sk_buff *skb; | |
1046 | u32 dport = 0; | |
1047 | bool ignore = true; | |
1048 | ||
1049 | spin_lock_bh(&list->lock); | |
1050 | skb_queue_walk(list, skb) { | |
1051 | dport = msg_destport(buf_msg(skb)); | |
1052 | if (!filter || skb_queue_is_last(list, skb)) | |
1053 | break; | |
1054 | if (dport == filter) | |
1055 | ignore = false; | |
1056 | else if (!ignore) | |
1057 | break; | |
1058 | } | |
1059 | spin_unlock_bh(&list->lock); | |
1060 | return dport; | |
1061 | } | |
1062 | ||
1063 | /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list | |
1064 | * @list: list to be unlinked from | |
1065 | * @dport: selection criteria for buffer to unlink | |
1066 | */ | |
1067 | static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list, | |
1068 | u32 dport) | |
1069 | { | |
1070 | struct sk_buff *_skb, *tmp, *skb = NULL; | |
1071 | ||
1072 | spin_lock_bh(&list->lock); | |
1073 | skb_queue_walk_safe(list, _skb, tmp) { | |
1074 | if (msg_destport(buf_msg(_skb)) == dport) { | |
1075 | __skb_unlink(_skb, list); | |
1076 | skb = _skb; | |
1077 | break; | |
1078 | } | |
1079 | } | |
1080 | spin_unlock_bh(&list->lock); | |
1081 | return skb; | |
1082 | } | |
1083 | ||
598411d7 JPM |
1084 | /* tipc_skb_queue_splice_tail - append an skb list to lock protected list |
1085 | * @list: the new list to append. Not lock protected | |
1086 | * @head: target list. Lock protected. | |
1087 | */ | |
1088 | static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list, | |
1089 | struct sk_buff_head *head) | |
1090 | { | |
1091 | spin_lock_bh(&head->lock); | |
1092 | skb_queue_splice_tail(list, head); | |
1093 | spin_unlock_bh(&head->lock); | |
1094 | } | |
1095 | ||
1096 | /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists | |
1097 | * @list: the new list to add. Lock protected. Will be reinitialized | |
1098 | * @head: target list. Lock protected. | |
1099 | */ | |
1100 | static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list, | |
1101 | struct sk_buff_head *head) | |
1102 | { | |
1103 | struct sk_buff_head tmp; | |
1104 | ||
1105 | __skb_queue_head_init(&tmp); | |
1106 | ||
1107 | spin_lock_bh(&list->lock); | |
1108 | skb_queue_splice_tail_init(list, &tmp); | |
1109 | spin_unlock_bh(&list->lock); | |
1110 | tipc_skb_queue_splice_tail(&tmp, head); | |
1111 | } | |
1112 | ||
b97bf3fd | 1113 | #endif |