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 | |
9195948f TL |
120 | /* struct tipc_gap_ack - TIPC Gap ACK block |
121 | * @ack: seqno of the last consecutive packet in link deferdq | |
122 | * @gap: number of gap packets since the last ack | |
123 | * | |
124 | * E.g: | |
125 | * link deferdq: 1 2 3 4 10 11 13 14 15 20 | |
126 | * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0> | |
127 | */ | |
128 | struct tipc_gap_ack { | |
129 | __be16 ack; | |
130 | __be16 gap; | |
131 | }; | |
132 | ||
133 | /* struct tipc_gap_ack_blks | |
134 | * @len: actual length of the record | |
135 | * @gack_cnt: number of Gap ACK blocks in the record | |
136 | * @gacks: array of Gap ACK blocks | |
137 | */ | |
138 | struct tipc_gap_ack_blks { | |
139 | __be16 len; | |
140 | u8 gack_cnt; | |
141 | u8 reserved; | |
142 | struct tipc_gap_ack gacks[]; | |
143 | }; | |
144 | ||
145 | #define tipc_gap_ack_blks_sz(n) (sizeof(struct tipc_gap_ack_blks) + \ | |
146 | sizeof(struct tipc_gap_ack) * (n)) | |
147 | ||
148 | #define MAX_GAP_ACK_BLKS 32 | |
149 | #define MAX_GAP_ACK_BLKS_SZ tipc_gap_ack_blks_sz(MAX_GAP_ACK_BLKS) | |
150 | ||
859fc7c0 YX |
151 | static inline struct tipc_msg *buf_msg(struct sk_buff *skb) |
152 | { | |
153 | return (struct tipc_msg *)skb->data; | |
154 | } | |
155 | ||
d265fef6 AS |
156 | static inline u32 msg_word(struct tipc_msg *m, u32 pos) |
157 | { | |
158 | return ntohl(m->hdr[pos]); | |
159 | } | |
b97bf3fd PL |
160 | |
161 | static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) | |
162 | { | |
163 | m->hdr[w] = htonl(val); | |
164 | } | |
165 | ||
d265fef6 AS |
166 | static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask) |
167 | { | |
168 | return (msg_word(m, w) >> pos) & mask; | |
169 | } | |
170 | ||
b97bf3fd PL |
171 | static inline void msg_set_bits(struct tipc_msg *m, u32 w, |
172 | u32 pos, u32 mask, u32 val) | |
173 | { | |
1f9eda7e | 174 | val = (val & mask) << pos; |
becf3da2 AV |
175 | mask = mask << pos; |
176 | m->hdr[w] &= ~htonl(mask); | |
177 | m->hdr[w] |= htonl(val); | |
b97bf3fd PL |
178 | } |
179 | ||
40aecb1b AS |
180 | static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b) |
181 | { | |
182 | u32 temp = msg->hdr[a]; | |
183 | ||
184 | msg->hdr[a] = msg->hdr[b]; | |
185 | msg->hdr[b] = temp; | |
186 | } | |
187 | ||
c4307285 | 188 | /* |
b97bf3fd PL |
189 | * Word 0 |
190 | */ | |
b97bf3fd PL |
191 | static inline u32 msg_version(struct tipc_msg *m) |
192 | { | |
193 | return msg_bits(m, 0, 29, 7); | |
194 | } | |
195 | ||
c4307285 | 196 | static inline void msg_set_version(struct tipc_msg *m) |
b97bf3fd | 197 | { |
37695420 | 198 | msg_set_bits(m, 0, 29, 7, TIPC_VERSION); |
b97bf3fd PL |
199 | } |
200 | ||
201 | static inline u32 msg_user(struct tipc_msg *m) | |
202 | { | |
203 | return msg_bits(m, 0, 25, 0xf); | |
204 | } | |
205 | ||
206 | static inline u32 msg_isdata(struct tipc_msg *m) | |
207 | { | |
a02cec21 | 208 | return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE; |
b97bf3fd PL |
209 | } |
210 | ||
c4307285 | 211 | static inline void msg_set_user(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
212 | { |
213 | msg_set_bits(m, 0, 25, 0xf, n); | |
214 | } | |
215 | ||
d265fef6 AS |
216 | static inline u32 msg_hdr_sz(struct tipc_msg *m) |
217 | { | |
218 | return msg_bits(m, 0, 21, 0xf) << 2; | |
219 | } | |
220 | ||
0e65967e | 221 | static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
222 | { |
223 | msg_set_bits(m, 0, 21, 0xf, n>>2); | |
224 | } | |
225 | ||
d265fef6 AS |
226 | static inline u32 msg_size(struct tipc_msg *m) |
227 | { | |
228 | return msg_bits(m, 0, 0, 0x1ffff); | |
229 | } | |
230 | ||
5b8dddb6 JM |
231 | static inline u32 msg_blocks(struct tipc_msg *m) |
232 | { | |
233 | return (msg_size(m) / 1024) + 1; | |
234 | } | |
235 | ||
d265fef6 AS |
236 | static inline u32 msg_data_sz(struct tipc_msg *m) |
237 | { | |
238 | return msg_size(m) - msg_hdr_sz(m); | |
239 | } | |
240 | ||
c4307285 | 241 | static inline int msg_non_seq(struct tipc_msg *m) |
b97bf3fd PL |
242 | { |
243 | return msg_bits(m, 0, 20, 1); | |
244 | } | |
245 | ||
40aecb1b | 246 | static inline void msg_set_non_seq(struct tipc_msg *m, u32 n) |
b97bf3fd | 247 | { |
40aecb1b | 248 | msg_set_bits(m, 0, 20, 1, n); |
b97bf3fd PL |
249 | } |
250 | ||
25b9221b JM |
251 | static inline int msg_is_syn(struct tipc_msg *m) |
252 | { | |
253 | return msg_bits(m, 0, 17, 1); | |
254 | } | |
255 | ||
256 | static inline void msg_set_syn(struct tipc_msg *m, u32 d) | |
257 | { | |
258 | msg_set_bits(m, 0, 17, 1, d); | |
259 | } | |
260 | ||
c4307285 | 261 | static inline int msg_dest_droppable(struct tipc_msg *m) |
b97bf3fd PL |
262 | { |
263 | return msg_bits(m, 0, 19, 1); | |
264 | } | |
265 | ||
c4307285 | 266 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
267 | { |
268 | msg_set_bits(m, 0, 19, 1, d); | |
269 | } | |
270 | ||
8d6e79d3 JM |
271 | static inline int msg_is_keepalive(struct tipc_msg *m) |
272 | { | |
273 | return msg_bits(m, 0, 19, 1); | |
274 | } | |
275 | ||
276 | static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d) | |
277 | { | |
278 | msg_set_bits(m, 0, 19, 1, d); | |
279 | } | |
280 | ||
c4307285 | 281 | static inline int msg_src_droppable(struct tipc_msg *m) |
b97bf3fd PL |
282 | { |
283 | return msg_bits(m, 0, 18, 1); | |
284 | } | |
285 | ||
c4307285 | 286 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
287 | { |
288 | msg_set_bits(m, 0, 18, 1, d); | |
289 | } | |
290 | ||
c55c8eda HL |
291 | static inline bool msg_is_rcast(struct tipc_msg *m) |
292 | { | |
293 | return msg_bits(m, 0, 18, 0x1); | |
294 | } | |
295 | ||
296 | static inline void msg_set_is_rcast(struct tipc_msg *m, bool d) | |
297 | { | |
298 | msg_set_bits(m, 0, 18, 0x1, d); | |
299 | } | |
300 | ||
b97bf3fd PL |
301 | static inline void msg_set_size(struct tipc_msg *m, u32 sz) |
302 | { | |
303 | m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); | |
304 | } | |
305 | ||
3127a020 JPM |
306 | static inline unchar *msg_data(struct tipc_msg *m) |
307 | { | |
308 | return ((unchar *)m) + msg_hdr_sz(m); | |
309 | } | |
310 | ||
a7dc51ad | 311 | static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m) |
3127a020 JPM |
312 | { |
313 | return (struct tipc_msg *)msg_data(m); | |
314 | } | |
b97bf3fd | 315 | |
c4307285 | 316 | /* |
b97bf3fd PL |
317 | * Word 1 |
318 | */ | |
d265fef6 AS |
319 | static inline u32 msg_type(struct tipc_msg *m) |
320 | { | |
321 | return msg_bits(m, 1, 29, 0x7); | |
322 | } | |
323 | ||
c4307285 | 324 | static inline void msg_set_type(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
325 | { |
326 | msg_set_bits(m, 1, 29, 0x7, n); | |
327 | } | |
328 | ||
75da2163 JM |
329 | static inline int msg_in_group(struct tipc_msg *m) |
330 | { | |
ae236fb2 JM |
331 | int mtyp = msg_type(m); |
332 | ||
27bd9ec0 | 333 | return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG; |
ae236fb2 JM |
334 | } |
335 | ||
336 | static inline bool msg_is_grp_evt(struct tipc_msg *m) | |
337 | { | |
338 | return msg_type(m) == TIPC_GRP_MEMBER_EVT; | |
75da2163 JM |
339 | } |
340 | ||
d265fef6 AS |
341 | static inline u32 msg_named(struct tipc_msg *m) |
342 | { | |
343 | return msg_type(m) == TIPC_NAMED_MSG; | |
344 | } | |
345 | ||
346 | static inline u32 msg_mcast(struct tipc_msg *m) | |
347 | { | |
75da2163 JM |
348 | int mtyp = msg_type(m); |
349 | ||
5b8dddb6 JM |
350 | return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) || |
351 | (mtyp == TIPC_GRP_MCAST_MSG)); | |
d265fef6 AS |
352 | } |
353 | ||
354 | static inline u32 msg_connected(struct tipc_msg *m) | |
355 | { | |
356 | return msg_type(m) == TIPC_CONN_MSG; | |
357 | } | |
358 | ||
359 | static inline u32 msg_errcode(struct tipc_msg *m) | |
360 | { | |
361 | return msg_bits(m, 1, 25, 0xf); | |
362 | } | |
363 | ||
c4307285 | 364 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
b97bf3fd PL |
365 | { |
366 | msg_set_bits(m, 1, 25, 0xf, err); | |
367 | } | |
368 | ||
c4307285 | 369 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
370 | { |
371 | return msg_bits(m, 1, 21, 0xf); | |
372 | } | |
373 | ||
c4307285 | 374 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
375 | { |
376 | msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); | |
377 | } | |
378 | ||
c4307285 | 379 | static inline void msg_reset_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
380 | { |
381 | msg_set_bits(m, 1, 21, 0xf, 0); | |
382 | } | |
383 | ||
384 | static inline u32 msg_lookup_scope(struct tipc_msg *m) | |
385 | { | |
386 | return msg_bits(m, 1, 19, 0x3); | |
387 | } | |
388 | ||
c4307285 | 389 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
390 | { |
391 | msg_set_bits(m, 1, 19, 0x3, n); | |
392 | } | |
393 | ||
e4bf4f76 | 394 | static inline u16 msg_bcast_ack(struct tipc_msg *m) |
b97bf3fd PL |
395 | { |
396 | return msg_bits(m, 1, 0, 0xffff); | |
397 | } | |
398 | ||
e4bf4f76 | 399 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
400 | { |
401 | msg_set_bits(m, 1, 0, 0xffff, n); | |
402 | } | |
403 | ||
91986ee1 TL |
404 | /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch |
405 | * link peer session number | |
406 | */ | |
407 | static inline bool msg_dest_session_valid(struct tipc_msg *m) | |
408 | { | |
409 | return msg_bits(m, 1, 16, 0x1); | |
410 | } | |
411 | ||
412 | static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid) | |
413 | { | |
414 | msg_set_bits(m, 1, 16, 0x1, valid); | |
415 | } | |
416 | ||
417 | static inline u16 msg_dest_session(struct tipc_msg *m) | |
418 | { | |
419 | return msg_bits(m, 1, 0, 0xffff); | |
420 | } | |
421 | ||
422 | static inline void msg_set_dest_session(struct tipc_msg *m, u16 n) | |
423 | { | |
424 | msg_set_bits(m, 1, 0, 0xffff, n); | |
425 | } | |
b97bf3fd | 426 | |
c4307285 | 427 | /* |
b97bf3fd PL |
428 | * Word 2 |
429 | */ | |
e4bf4f76 | 430 | static inline u16 msg_ack(struct tipc_msg *m) |
b97bf3fd PL |
431 | { |
432 | return msg_bits(m, 2, 16, 0xffff); | |
433 | } | |
434 | ||
e4bf4f76 | 435 | static inline void msg_set_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
436 | { |
437 | msg_set_bits(m, 2, 16, 0xffff, n); | |
438 | } | |
439 | ||
e4bf4f76 | 440 | static inline u16 msg_seqno(struct tipc_msg *m) |
b97bf3fd PL |
441 | { |
442 | return msg_bits(m, 2, 0, 0xffff); | |
443 | } | |
444 | ||
e4bf4f76 | 445 | static inline void msg_set_seqno(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
446 | { |
447 | msg_set_bits(m, 2, 0, 0xffff, n); | |
448 | } | |
449 | ||
c4307285 | 450 | /* |
b97bf3fd PL |
451 | * Words 3-10 |
452 | */ | |
e3eea1eb JPM |
453 | static inline u32 msg_importance(struct tipc_msg *m) |
454 | { | |
f21e897e JPM |
455 | int usr = msg_user(m); |
456 | ||
457 | if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m))) | |
458 | return usr; | |
459 | if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)) | |
dde4b5ae | 460 | return msg_bits(m, 9, 0, 0x7); |
e3eea1eb JPM |
461 | return TIPC_SYSTEM_IMPORTANCE; |
462 | } | |
463 | ||
464 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) | |
465 | { | |
f21e897e JPM |
466 | int usr = msg_user(m); |
467 | ||
468 | if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))) | |
dde4b5ae | 469 | msg_set_bits(m, 9, 0, 0x7, i); |
f21e897e | 470 | else if (i < TIPC_SYSTEM_IMPORTANCE) |
e3eea1eb JPM |
471 | msg_set_user(m, i); |
472 | else | |
473 | pr_warn("Trying to set illegal importance in message\n"); | |
474 | } | |
475 | ||
d265fef6 AS |
476 | static inline u32 msg_prevnode(struct tipc_msg *m) |
477 | { | |
478 | return msg_word(m, 3); | |
479 | } | |
480 | ||
c4307285 | 481 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
482 | { |
483 | msg_set_word(m, 3, a); | |
484 | } | |
485 | ||
d265fef6 AS |
486 | static inline u32 msg_origport(struct tipc_msg *m) |
487 | { | |
3127a020 | 488 | if (msg_user(m) == MSG_FRAGMENTER) |
a7dc51ad | 489 | m = msg_inner_hdr(m); |
d265fef6 AS |
490 | return msg_word(m, 4); |
491 | } | |
492 | ||
c4307285 | 493 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
494 | { |
495 | msg_set_word(m, 4, p); | |
496 | } | |
497 | ||
d265fef6 AS |
498 | static inline u32 msg_destport(struct tipc_msg *m) |
499 | { | |
500 | return msg_word(m, 5); | |
501 | } | |
502 | ||
c4307285 | 503 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
504 | { |
505 | msg_set_word(m, 5, p); | |
506 | } | |
507 | ||
d265fef6 AS |
508 | static inline u32 msg_mc_netid(struct tipc_msg *m) |
509 | { | |
510 | return msg_word(m, 5); | |
511 | } | |
512 | ||
c4307285 | 513 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
514 | { |
515 | msg_set_word(m, 5, p); | |
516 | } | |
517 | ||
d265fef6 AS |
518 | static inline int msg_short(struct tipc_msg *m) |
519 | { | |
741d9eb7 | 520 | return msg_hdr_sz(m) == SHORT_H_SIZE; |
d265fef6 AS |
521 | } |
522 | ||
523 | static inline u32 msg_orignode(struct tipc_msg *m) | |
524 | { | |
525 | if (likely(msg_short(m))) | |
526 | return msg_prevnode(m); | |
527 | return msg_word(m, 6); | |
528 | } | |
529 | ||
c4307285 | 530 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
531 | { |
532 | msg_set_word(m, 6, a); | |
533 | } | |
534 | ||
d265fef6 AS |
535 | static inline u32 msg_destnode(struct tipc_msg *m) |
536 | { | |
537 | return msg_word(m, 7); | |
538 | } | |
539 | ||
c4307285 | 540 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
541 | { |
542 | msg_set_word(m, 7, a); | |
543 | } | |
544 | ||
d265fef6 AS |
545 | static inline u32 msg_nametype(struct tipc_msg *m) |
546 | { | |
547 | return msg_word(m, 8); | |
548 | } | |
549 | ||
c4307285 | 550 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
551 | { |
552 | msg_set_word(m, 8, n); | |
553 | } | |
554 | ||
d265fef6 AS |
555 | static inline u32 msg_nameinst(struct tipc_msg *m) |
556 | { | |
557 | return msg_word(m, 9); | |
558 | } | |
559 | ||
560 | static inline u32 msg_namelower(struct tipc_msg *m) | |
561 | { | |
562 | return msg_nameinst(m); | |
563 | } | |
564 | ||
c4307285 | 565 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
566 | { |
567 | msg_set_word(m, 9, n); | |
568 | } | |
569 | ||
c4307285 | 570 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
571 | { |
572 | msg_set_namelower(m, n); | |
573 | } | |
574 | ||
d265fef6 AS |
575 | static inline u32 msg_nameupper(struct tipc_msg *m) |
576 | { | |
577 | return msg_word(m, 10); | |
578 | } | |
579 | ||
c4307285 | 580 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
581 | { |
582 | msg_set_word(m, 10, n); | |
583 | } | |
584 | ||
b97bf3fd | 585 | /* |
cc4c4353 AS |
586 | * Constants and routines used to read and write TIPC internal message headers |
587 | */ | |
b97bf3fd | 588 | |
c4307285 | 589 | /* |
cc4c4353 | 590 | * Connection management protocol message types |
b97bf3fd | 591 | */ |
b97bf3fd PL |
592 | #define CONN_PROBE 0 |
593 | #define CONN_PROBE_REPLY 1 | |
594 | #define CONN_ACK 2 | |
595 | ||
c4307285 | 596 | /* |
cc4c4353 | 597 | * Name distributor message types |
b97bf3fd | 598 | */ |
b97bf3fd PL |
599 | #define PUBLICATION 0 |
600 | #define WITHDRAWAL 1 | |
601 | ||
92138d1f AS |
602 | /* |
603 | * Segmentation message types | |
604 | */ | |
92138d1f AS |
605 | #define FIRST_FRAGMENT 0 |
606 | #define FRAGMENT 1 | |
607 | #define LAST_FRAGMENT 2 | |
608 | ||
609 | /* | |
610 | * Link management protocol message types | |
611 | */ | |
92138d1f AS |
612 | #define STATE_MSG 0 |
613 | #define RESET_MSG 1 | |
614 | #define ACTIVATE_MSG 2 | |
615 | ||
616 | /* | |
617 | * Changeover tunnel message types | |
618 | */ | |
dff29b1a JPM |
619 | #define SYNCH_MSG 0 |
620 | #define FAILOVER_MSG 1 | |
92138d1f AS |
621 | |
622 | /* | |
623 | * Config protocol message types | |
624 | */ | |
92138d1f AS |
625 | #define DSC_REQ_MSG 0 |
626 | #define DSC_RESP_MSG 1 | |
25b0b9c4 JM |
627 | #define DSC_TRIAL_MSG 2 |
628 | #define DSC_TRIAL_FAIL_MSG 3 | |
92138d1f | 629 | |
75da2163 JM |
630 | /* |
631 | * Group protocol message types | |
632 | */ | |
633 | #define GRP_JOIN_MSG 0 | |
634 | #define GRP_LEAVE_MSG 1 | |
b7d42635 | 635 | #define GRP_ADV_MSG 2 |
2f487712 | 636 | #define GRP_ACK_MSG 3 |
04d7b574 JM |
637 | #define GRP_RECLAIM_MSG 4 |
638 | #define GRP_REMIT_MSG 5 | |
75da2163 | 639 | |
c4307285 | 640 | /* |
b97bf3fd PL |
641 | * Word 1 |
642 | */ | |
b97bf3fd PL |
643 | static inline u32 msg_seq_gap(struct tipc_msg *m) |
644 | { | |
bd784533 | 645 | return msg_bits(m, 1, 16, 0x1fff); |
b97bf3fd PL |
646 | } |
647 | ||
648 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) | |
649 | { | |
bd784533 | 650 | msg_set_bits(m, 1, 16, 0x1fff, n); |
b97bf3fd PL |
651 | } |
652 | ||
fc0eea69 AS |
653 | static inline u32 msg_node_sig(struct tipc_msg *m) |
654 | { | |
655 | return msg_bits(m, 1, 0, 0xffff); | |
656 | } | |
657 | ||
658 | static inline void msg_set_node_sig(struct tipc_msg *m, u32 n) | |
659 | { | |
660 | msg_set_bits(m, 1, 0, 0xffff, n); | |
661 | } | |
662 | ||
7764d6e8 JPM |
663 | static inline u32 msg_node_capabilities(struct tipc_msg *m) |
664 | { | |
665 | return msg_bits(m, 1, 15, 0x1fff); | |
666 | } | |
667 | ||
668 | static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n) | |
669 | { | |
670 | msg_set_bits(m, 1, 15, 0x1fff, n); | |
671 | } | |
672 | ||
c4307285 | 673 | /* |
b97bf3fd PL |
674 | * Word 2 |
675 | */ | |
b97bf3fd PL |
676 | static inline u32 msg_dest_domain(struct tipc_msg *m) |
677 | { | |
678 | return msg_word(m, 2); | |
679 | } | |
680 | ||
c4307285 | 681 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
682 | { |
683 | msg_set_word(m, 2, n); | |
684 | } | |
685 | ||
686 | static inline u32 msg_bcgap_after(struct tipc_msg *m) | |
687 | { | |
688 | return msg_bits(m, 2, 16, 0xffff); | |
689 | } | |
690 | ||
691 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) | |
692 | { | |
693 | msg_set_bits(m, 2, 16, 0xffff, n); | |
694 | } | |
695 | ||
696 | static inline u32 msg_bcgap_to(struct tipc_msg *m) | |
697 | { | |
698 | return msg_bits(m, 2, 0, 0xffff); | |
699 | } | |
700 | ||
c4307285 | 701 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
702 | { |
703 | msg_set_bits(m, 2, 0, 0xffff, n); | |
704 | } | |
705 | ||
c4307285 | 706 | /* |
b97bf3fd PL |
707 | * Word 4 |
708 | */ | |
b97bf3fd PL |
709 | static inline u32 msg_last_bcast(struct tipc_msg *m) |
710 | { | |
711 | return msg_bits(m, 4, 16, 0xffff); | |
712 | } | |
713 | ||
52666986 JPM |
714 | static inline u32 msg_bc_snd_nxt(struct tipc_msg *m) |
715 | { | |
716 | return msg_last_bcast(m) + 1; | |
717 | } | |
718 | ||
b97bf3fd PL |
719 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) |
720 | { | |
721 | msg_set_bits(m, 4, 16, 0xffff, n); | |
722 | } | |
723 | ||
b97bf3fd PL |
724 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) |
725 | { | |
726 | msg_set_bits(m, 4, 16, 0xffff, n); | |
727 | } | |
728 | ||
729 | ||
6e498158 | 730 | static inline u16 msg_next_sent(struct tipc_msg *m) |
b97bf3fd PL |
731 | { |
732 | return msg_bits(m, 4, 0, 0xffff); | |
733 | } | |
734 | ||
6e498158 | 735 | static inline void msg_set_next_sent(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
736 | { |
737 | msg_set_bits(m, 4, 0, 0xffff, n); | |
738 | } | |
739 | ||
b97bf3fd PL |
740 | static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) |
741 | { | |
742 | msg_set_bits(m, 4, 0, 0xffff, n); | |
743 | } | |
744 | ||
745 | static inline u32 msg_bc_netid(struct tipc_msg *m) | |
746 | { | |
747 | return msg_word(m, 4); | |
748 | } | |
749 | ||
750 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) | |
751 | { | |
752 | msg_set_word(m, 4, id); | |
753 | } | |
754 | ||
755 | static inline u32 msg_link_selector(struct tipc_msg *m) | |
756 | { | |
a853e4c6 JPM |
757 | if (msg_user(m) == MSG_FRAGMENTER) |
758 | m = (void *)msg_data(m); | |
b97bf3fd PL |
759 | return msg_bits(m, 4, 0, 1); |
760 | } | |
761 | ||
c4307285 | 762 | /* |
b97bf3fd PL |
763 | * Word 5 |
764 | */ | |
d999297c | 765 | static inline u16 msg_session(struct tipc_msg *m) |
b97bf3fd PL |
766 | { |
767 | return msg_bits(m, 5, 16, 0xffff); | |
768 | } | |
769 | ||
d999297c | 770 | static inline void msg_set_session(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
771 | { |
772 | msg_set_bits(m, 5, 16, 0xffff, n); | |
773 | } | |
774 | ||
775 | static inline u32 msg_probe(struct tipc_msg *m) | |
776 | { | |
777 | return msg_bits(m, 5, 0, 1); | |
778 | } | |
779 | ||
780 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) | |
781 | { | |
7eb878ed | 782 | msg_set_bits(m, 5, 0, 1, val); |
b97bf3fd PL |
783 | } |
784 | ||
785 | static inline char msg_net_plane(struct tipc_msg *m) | |
786 | { | |
787 | return msg_bits(m, 5, 1, 7) + 'A'; | |
788 | } | |
789 | ||
790 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) | |
791 | { | |
792 | msg_set_bits(m, 5, 1, 7, (n - 'A')); | |
793 | } | |
794 | ||
795 | static inline u32 msg_linkprio(struct tipc_msg *m) | |
796 | { | |
797 | return msg_bits(m, 5, 4, 0x1f); | |
798 | } | |
799 | ||
800 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) | |
801 | { | |
802 | msg_set_bits(m, 5, 4, 0x1f, n); | |
803 | } | |
804 | ||
805 | static inline u32 msg_bearer_id(struct tipc_msg *m) | |
806 | { | |
807 | return msg_bits(m, 5, 9, 0x7); | |
808 | } | |
809 | ||
810 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) | |
811 | { | |
812 | msg_set_bits(m, 5, 9, 0x7, n); | |
813 | } | |
814 | ||
815 | static inline u32 msg_redundant_link(struct tipc_msg *m) | |
816 | { | |
817 | return msg_bits(m, 5, 12, 0x1); | |
818 | } | |
819 | ||
77f167fc | 820 | static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r) |
b97bf3fd | 821 | { |
77f167fc | 822 | msg_set_bits(m, 5, 12, 0x1, r); |
b97bf3fd PL |
823 | } |
824 | ||
634696b1 JPM |
825 | static inline u32 msg_peer_stopping(struct tipc_msg *m) |
826 | { | |
827 | return msg_bits(m, 5, 13, 0x1); | |
828 | } | |
829 | ||
830 | static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s) | |
831 | { | |
832 | msg_set_bits(m, 5, 13, 0x1, s); | |
833 | } | |
834 | ||
06bd2b1e JPM |
835 | static inline bool msg_bc_ack_invalid(struct tipc_msg *m) |
836 | { | |
837 | switch (msg_user(m)) { | |
838 | case BCAST_PROTOCOL: | |
839 | case NAME_DISTRIBUTOR: | |
840 | case LINK_PROTOCOL: | |
841 | return msg_bits(m, 5, 14, 0x1); | |
842 | default: | |
843 | return false; | |
844 | } | |
845 | } | |
846 | ||
847 | static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid) | |
848 | { | |
849 | msg_set_bits(m, 5, 14, 0x1, invalid); | |
850 | } | |
851 | ||
3d749a6a AS |
852 | static inline char *msg_media_addr(struct tipc_msg *m) |
853 | { | |
91e2eb56 | 854 | return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET]; |
3d749a6a | 855 | } |
b97bf3fd | 856 | |
02d11ca2 JPM |
857 | static inline u32 msg_bc_gap(struct tipc_msg *m) |
858 | { | |
859 | return msg_bits(m, 8, 0, 0x3ff); | |
860 | } | |
861 | ||
862 | static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n) | |
863 | { | |
864 | msg_set_bits(m, 8, 0, 0x3ff, n); | |
865 | } | |
866 | ||
c4307285 | 867 | /* |
b97bf3fd PL |
868 | * Word 9 |
869 | */ | |
6e498158 | 870 | static inline u16 msg_msgcnt(struct tipc_msg *m) |
b97bf3fd PL |
871 | { |
872 | return msg_bits(m, 9, 16, 0xffff); | |
873 | } | |
874 | ||
6e498158 | 875 | static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
876 | { |
877 | msg_set_bits(m, 9, 16, 0xffff, n); | |
878 | } | |
879 | ||
10724cc7 | 880 | static inline u32 msg_conn_ack(struct tipc_msg *m) |
b97bf3fd PL |
881 | { |
882 | return msg_bits(m, 9, 16, 0xffff); | |
883 | } | |
884 | ||
10724cc7 | 885 | static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
886 | { |
887 | msg_set_bits(m, 9, 16, 0xffff, n); | |
888 | } | |
889 | ||
b7d42635 | 890 | static inline u16 msg_adv_win(struct tipc_msg *m) |
10724cc7 JPM |
891 | { |
892 | return msg_bits(m, 9, 0, 0xffff); | |
893 | } | |
894 | ||
b7d42635 | 895 | static inline void msg_set_adv_win(struct tipc_msg *m, u16 n) |
10724cc7 JPM |
896 | { |
897 | msg_set_bits(m, 9, 0, 0xffff, n); | |
898 | } | |
899 | ||
c4307285 | 900 | static inline u32 msg_max_pkt(struct tipc_msg *m) |
b97bf3fd | 901 | { |
a02cec21 | 902 | return msg_bits(m, 9, 16, 0xffff) * 4; |
b97bf3fd PL |
903 | } |
904 | ||
c4307285 | 905 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
906 | { |
907 | msg_set_bits(m, 9, 16, 0xffff, (n / 4)); | |
908 | } | |
909 | ||
910 | static inline u32 msg_link_tolerance(struct tipc_msg *m) | |
911 | { | |
912 | return msg_bits(m, 9, 0, 0xffff); | |
913 | } | |
914 | ||
915 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) | |
916 | { | |
917 | msg_set_bits(m, 9, 0, 0xffff, n); | |
918 | } | |
919 | ||
75da2163 JM |
920 | static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m) |
921 | { | |
922 | return msg_bits(m, 9, 16, 0xffff); | |
923 | } | |
924 | ||
925 | static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n) | |
926 | { | |
927 | msg_set_bits(m, 9, 16, 0xffff, n); | |
928 | } | |
929 | ||
2f487712 JM |
930 | static inline u16 msg_grp_bc_acked(struct tipc_msg *m) |
931 | { | |
932 | return msg_bits(m, 9, 16, 0xffff); | |
933 | } | |
934 | ||
935 | static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n) | |
936 | { | |
937 | msg_set_bits(m, 9, 16, 0xffff, n); | |
938 | } | |
939 | ||
04d7b574 JM |
940 | static inline u16 msg_grp_remitted(struct tipc_msg *m) |
941 | { | |
942 | return msg_bits(m, 9, 16, 0xffff); | |
943 | } | |
944 | ||
945 | static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n) | |
946 | { | |
947 | msg_set_bits(m, 9, 16, 0xffff, n); | |
948 | } | |
949 | ||
75da2163 JM |
950 | /* Word 10 |
951 | */ | |
ae236fb2 JM |
952 | static inline u16 msg_grp_evt(struct tipc_msg *m) |
953 | { | |
954 | return msg_bits(m, 10, 0, 0x3); | |
955 | } | |
956 | ||
957 | static inline void msg_set_grp_evt(struct tipc_msg *m, int n) | |
958 | { | |
959 | msg_set_bits(m, 10, 0, 0x3, n); | |
960 | } | |
961 | ||
2f487712 JM |
962 | static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m) |
963 | { | |
964 | return msg_bits(m, 10, 0, 0x1); | |
965 | } | |
966 | ||
967 | static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n) | |
968 | { | |
969 | msg_set_bits(m, 10, 0, 0x1, n); | |
970 | } | |
971 | ||
75da2163 JM |
972 | static inline u16 msg_grp_bc_seqno(struct tipc_msg *m) |
973 | { | |
974 | return msg_bits(m, 10, 16, 0xffff); | |
975 | } | |
976 | ||
977 | static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n) | |
978 | { | |
979 | msg_set_bits(m, 10, 16, 0xffff, n); | |
980 | } | |
981 | ||
6e498158 | 982 | static inline bool msg_peer_link_is_up(struct tipc_msg *m) |
1a20cc25 | 983 | { |
d999297c | 984 | if (likely(msg_user(m) != LINK_PROTOCOL)) |
1a20cc25 | 985 | return true; |
6e498158 JPM |
986 | if (msg_type(m) == STATE_MSG) |
987 | return true; | |
988 | return false; | |
d999297c JPM |
989 | } |
990 | ||
6e498158 | 991 | static inline bool msg_peer_node_is_up(struct tipc_msg *m) |
d999297c | 992 | { |
6e498158 JPM |
993 | if (msg_peer_link_is_up(m)) |
994 | return true; | |
1a20cc25 JPM |
995 | return msg_redundant_link(m); |
996 | } | |
997 | ||
5b7066c3 JPM |
998 | static inline bool msg_is_reset(struct tipc_msg *hdr) |
999 | { | |
1000 | return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG); | |
1001 | } | |
1002 | ||
25b0b9c4 JM |
1003 | static inline u32 msg_sugg_node_addr(struct tipc_msg *m) |
1004 | { | |
1005 | return msg_word(m, 14); | |
1006 | } | |
1007 | ||
1008 | static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n) | |
1009 | { | |
1010 | msg_set_word(m, 14, n); | |
1011 | } | |
1012 | ||
1013 | static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id) | |
1014 | { | |
1015 | memcpy(msg_data(hdr), id, 16); | |
1016 | } | |
1017 | ||
1018 | static inline u8 *msg_node_id(struct tipc_msg *hdr) | |
1019 | { | |
1020 | return (u8 *)msg_data(hdr); | |
1021 | } | |
1022 | ||
57d5f64d | 1023 | struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp); |
d618d09a | 1024 | bool tipc_msg_validate(struct sk_buff **_skb); |
bcd3ffd4 | 1025 | bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err); |
64ac5f59 JM |
1026 | void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb, |
1027 | struct sk_buff_head *xmitq); | |
c5898636 | 1028 | void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type, |
34747539 | 1029 | u32 hsize, u32 destnode); |
e3a77561 JPM |
1030 | struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, |
1031 | uint data_sz, u32 dnode, u32 onode, | |
1032 | u32 dport, u32 oport, int errcode); | |
37e22164 | 1033 | int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf); |
dd3f9e70 JPM |
1034 | bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu); |
1035 | bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg, | |
1036 | u32 mtu, u32 dnode); | |
c637c103 | 1037 | bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos); |
c5898636 | 1038 | int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, |
34747539 | 1039 | int offset, int dsz, int mtu, struct sk_buff_head *list); |
cda3696d | 1040 | bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err); |
4c94cc2d | 1041 | bool tipc_msg_assemble(struct sk_buff_head *list); |
2f566124 | 1042 | bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq); |
a853e4c6 JPM |
1043 | bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg, |
1044 | struct sk_buff_head *cpy); | |
8306f99a JPM |
1045 | void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno, |
1046 | struct sk_buff *skb); | |
67879274 | 1047 | bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy); |
078bec82 | 1048 | |
e4bf4f76 JPM |
1049 | static inline u16 buf_seqno(struct sk_buff *skb) |
1050 | { | |
1051 | return msg_seqno(buf_msg(skb)); | |
1052 | } | |
1053 | ||
d618d09a JM |
1054 | static inline int buf_roundup_len(struct sk_buff *skb) |
1055 | { | |
1056 | return (skb->len / 1024 + 1) * 1024; | |
1057 | } | |
1058 | ||
cb1b7280 JPM |
1059 | /* tipc_skb_peek(): peek and reserve first buffer in list |
1060 | * @list: list to be peeked in | |
1061 | * Returns pointer to first buffer in list, if any | |
1062 | */ | |
1063 | static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list, | |
1064 | spinlock_t *lock) | |
1065 | { | |
1066 | struct sk_buff *skb; | |
1067 | ||
1068 | spin_lock_bh(lock); | |
1069 | skb = skb_peek(list); | |
1070 | if (skb) | |
1071 | skb_get(skb); | |
1072 | spin_unlock_bh(lock); | |
1073 | return skb; | |
1074 | } | |
1075 | ||
c637c103 JPM |
1076 | /* tipc_skb_peek_port(): find a destination port, ignoring all destinations |
1077 | * up to and including 'filter'. | |
1078 | * Note: ignoring previously tried destinations minimizes the risk of | |
1079 | * contention on the socket lock | |
1080 | * @list: list to be peeked in | |
1081 | * @filter: last destination to be ignored from search | |
1082 | * Returns a destination port number, of applicable. | |
1083 | */ | |
1084 | static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter) | |
1085 | { | |
1086 | struct sk_buff *skb; | |
1087 | u32 dport = 0; | |
1088 | bool ignore = true; | |
1089 | ||
1090 | spin_lock_bh(&list->lock); | |
1091 | skb_queue_walk(list, skb) { | |
1092 | dport = msg_destport(buf_msg(skb)); | |
1093 | if (!filter || skb_queue_is_last(list, skb)) | |
1094 | break; | |
1095 | if (dport == filter) | |
1096 | ignore = false; | |
1097 | else if (!ignore) | |
1098 | break; | |
1099 | } | |
1100 | spin_unlock_bh(&list->lock); | |
1101 | return dport; | |
1102 | } | |
1103 | ||
1104 | /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list | |
1105 | * @list: list to be unlinked from | |
1106 | * @dport: selection criteria for buffer to unlink | |
1107 | */ | |
1108 | static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list, | |
1109 | u32 dport) | |
1110 | { | |
1111 | struct sk_buff *_skb, *tmp, *skb = NULL; | |
1112 | ||
1113 | spin_lock_bh(&list->lock); | |
1114 | skb_queue_walk_safe(list, _skb, tmp) { | |
1115 | if (msg_destport(buf_msg(_skb)) == dport) { | |
1116 | __skb_unlink(_skb, list); | |
1117 | skb = _skb; | |
1118 | break; | |
1119 | } | |
1120 | } | |
1121 | spin_unlock_bh(&list->lock); | |
1122 | return skb; | |
1123 | } | |
1124 | ||
598411d7 JPM |
1125 | /* tipc_skb_queue_splice_tail - append an skb list to lock protected list |
1126 | * @list: the new list to append. Not lock protected | |
1127 | * @head: target list. Lock protected. | |
1128 | */ | |
1129 | static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list, | |
1130 | struct sk_buff_head *head) | |
1131 | { | |
1132 | spin_lock_bh(&head->lock); | |
1133 | skb_queue_splice_tail(list, head); | |
1134 | spin_unlock_bh(&head->lock); | |
1135 | } | |
1136 | ||
1137 | /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists | |
1138 | * @list: the new list to add. Lock protected. Will be reinitialized | |
1139 | * @head: target list. Lock protected. | |
1140 | */ | |
1141 | static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list, | |
1142 | struct sk_buff_head *head) | |
1143 | { | |
1144 | struct sk_buff_head tmp; | |
1145 | ||
1146 | __skb_queue_head_init(&tmp); | |
1147 | ||
1148 | spin_lock_bh(&list->lock); | |
1149 | skb_queue_splice_tail_init(list, &tmp); | |
1150 | spin_unlock_bh(&list->lock); | |
1151 | tipc_skb_queue_splice_tail(&tmp, head); | |
1152 | } | |
1153 | ||
382f598f TL |
1154 | /* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno |
1155 | * @list: list to be dequeued from | |
1156 | * @seqno: seqno of the expected msg | |
1157 | * | |
1158 | * returns skb dequeued from the list if its seqno is less than or equal to | |
1159 | * the expected one, otherwise the skb is still hold | |
1160 | * | |
1161 | * Note: must be used with appropriate locks held only | |
1162 | */ | |
1163 | static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list, | |
1164 | u16 seqno) | |
1165 | { | |
1166 | struct sk_buff *skb = skb_peek(list); | |
1167 | ||
1168 | if (skb && less_eq(buf_seqno(skb), seqno)) { | |
1169 | __skb_unlink(skb, list); | |
1170 | return skb; | |
1171 | } | |
1172 | return NULL; | |
1173 | } | |
1174 | ||
b97bf3fd | 1175 | #endif |