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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 { |
859fc7c0 | 105 | struct sk_buff *tail; |
31c4f4cc | 106 | unsigned long nxt_retr; |
71204231 TL |
107 | unsigned long retr_stamp; |
108 | u32 bytes_read; | |
109 | u32 orig_member; | |
859fc7c0 | 110 | u16 chain_imp; |
c1ab3f1d | 111 | u16 ackers; |
71204231 TL |
112 | u16 retr_cnt; |
113 | bool validated; | |
859fc7c0 YX |
114 | }; |
115 | ||
116 | #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0])) | |
117 | ||
d265fef6 AS |
118 | struct tipc_msg { |
119 | __be32 hdr[15]; | |
120 | }; | |
c4307285 | 121 | |
9195948f TL |
122 | /* struct tipc_gap_ack - TIPC Gap ACK block |
123 | * @ack: seqno of the last consecutive packet in link deferdq | |
124 | * @gap: number of gap packets since the last ack | |
125 | * | |
126 | * E.g: | |
127 | * link deferdq: 1 2 3 4 10 11 13 14 15 20 | |
128 | * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0> | |
129 | */ | |
130 | struct tipc_gap_ack { | |
131 | __be16 ack; | |
132 | __be16 gap; | |
133 | }; | |
134 | ||
135 | /* struct tipc_gap_ack_blks | |
136 | * @len: actual length of the record | |
137 | * @gack_cnt: number of Gap ACK blocks in the record | |
138 | * @gacks: array of Gap ACK blocks | |
139 | */ | |
140 | struct tipc_gap_ack_blks { | |
141 | __be16 len; | |
142 | u8 gack_cnt; | |
143 | u8 reserved; | |
144 | struct tipc_gap_ack gacks[]; | |
145 | }; | |
146 | ||
147 | #define tipc_gap_ack_blks_sz(n) (sizeof(struct tipc_gap_ack_blks) + \ | |
148 | sizeof(struct tipc_gap_ack) * (n)) | |
149 | ||
150 | #define MAX_GAP_ACK_BLKS 32 | |
151 | #define MAX_GAP_ACK_BLKS_SZ tipc_gap_ack_blks_sz(MAX_GAP_ACK_BLKS) | |
152 | ||
859fc7c0 YX |
153 | static inline struct tipc_msg *buf_msg(struct sk_buff *skb) |
154 | { | |
155 | return (struct tipc_msg *)skb->data; | |
156 | } | |
157 | ||
d265fef6 AS |
158 | static inline u32 msg_word(struct tipc_msg *m, u32 pos) |
159 | { | |
160 | return ntohl(m->hdr[pos]); | |
161 | } | |
b97bf3fd PL |
162 | |
163 | static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) | |
164 | { | |
165 | m->hdr[w] = htonl(val); | |
166 | } | |
167 | ||
d265fef6 AS |
168 | static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask) |
169 | { | |
170 | return (msg_word(m, w) >> pos) & mask; | |
171 | } | |
172 | ||
b97bf3fd PL |
173 | static inline void msg_set_bits(struct tipc_msg *m, u32 w, |
174 | u32 pos, u32 mask, u32 val) | |
175 | { | |
1f9eda7e | 176 | val = (val & mask) << pos; |
becf3da2 AV |
177 | mask = mask << pos; |
178 | m->hdr[w] &= ~htonl(mask); | |
179 | m->hdr[w] |= htonl(val); | |
b97bf3fd PL |
180 | } |
181 | ||
40aecb1b AS |
182 | static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b) |
183 | { | |
184 | u32 temp = msg->hdr[a]; | |
185 | ||
186 | msg->hdr[a] = msg->hdr[b]; | |
187 | msg->hdr[b] = temp; | |
188 | } | |
189 | ||
c4307285 | 190 | /* |
b97bf3fd PL |
191 | * Word 0 |
192 | */ | |
b97bf3fd PL |
193 | static inline u32 msg_version(struct tipc_msg *m) |
194 | { | |
195 | return msg_bits(m, 0, 29, 7); | |
196 | } | |
197 | ||
c4307285 | 198 | static inline void msg_set_version(struct tipc_msg *m) |
b97bf3fd | 199 | { |
37695420 | 200 | msg_set_bits(m, 0, 29, 7, TIPC_VERSION); |
b97bf3fd PL |
201 | } |
202 | ||
203 | static inline u32 msg_user(struct tipc_msg *m) | |
204 | { | |
205 | return msg_bits(m, 0, 25, 0xf); | |
206 | } | |
207 | ||
208 | static inline u32 msg_isdata(struct tipc_msg *m) | |
209 | { | |
a02cec21 | 210 | return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE; |
b97bf3fd PL |
211 | } |
212 | ||
c4307285 | 213 | static inline void msg_set_user(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
214 | { |
215 | msg_set_bits(m, 0, 25, 0xf, n); | |
216 | } | |
217 | ||
d265fef6 AS |
218 | static inline u32 msg_hdr_sz(struct tipc_msg *m) |
219 | { | |
220 | return msg_bits(m, 0, 21, 0xf) << 2; | |
221 | } | |
222 | ||
0e65967e | 223 | static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
224 | { |
225 | msg_set_bits(m, 0, 21, 0xf, n>>2); | |
226 | } | |
227 | ||
d265fef6 AS |
228 | static inline u32 msg_size(struct tipc_msg *m) |
229 | { | |
230 | return msg_bits(m, 0, 0, 0x1ffff); | |
231 | } | |
232 | ||
5b8dddb6 JM |
233 | static inline u32 msg_blocks(struct tipc_msg *m) |
234 | { | |
235 | return (msg_size(m) / 1024) + 1; | |
236 | } | |
237 | ||
d265fef6 AS |
238 | static inline u32 msg_data_sz(struct tipc_msg *m) |
239 | { | |
240 | return msg_size(m) - msg_hdr_sz(m); | |
241 | } | |
242 | ||
c4307285 | 243 | static inline int msg_non_seq(struct tipc_msg *m) |
b97bf3fd PL |
244 | { |
245 | return msg_bits(m, 0, 20, 1); | |
246 | } | |
247 | ||
40aecb1b | 248 | static inline void msg_set_non_seq(struct tipc_msg *m, u32 n) |
b97bf3fd | 249 | { |
40aecb1b | 250 | msg_set_bits(m, 0, 20, 1, n); |
b97bf3fd PL |
251 | } |
252 | ||
25b9221b JM |
253 | static inline int msg_is_syn(struct tipc_msg *m) |
254 | { | |
255 | return msg_bits(m, 0, 17, 1); | |
256 | } | |
257 | ||
258 | static inline void msg_set_syn(struct tipc_msg *m, u32 d) | |
259 | { | |
260 | msg_set_bits(m, 0, 17, 1, d); | |
261 | } | |
262 | ||
c4307285 | 263 | static inline int msg_dest_droppable(struct tipc_msg *m) |
b97bf3fd PL |
264 | { |
265 | return msg_bits(m, 0, 19, 1); | |
266 | } | |
267 | ||
c4307285 | 268 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
269 | { |
270 | msg_set_bits(m, 0, 19, 1, d); | |
271 | } | |
272 | ||
8d6e79d3 JM |
273 | static inline int msg_is_keepalive(struct tipc_msg *m) |
274 | { | |
275 | return msg_bits(m, 0, 19, 1); | |
276 | } | |
277 | ||
278 | static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d) | |
279 | { | |
280 | msg_set_bits(m, 0, 19, 1, d); | |
281 | } | |
282 | ||
c4307285 | 283 | static inline int msg_src_droppable(struct tipc_msg *m) |
b97bf3fd PL |
284 | { |
285 | return msg_bits(m, 0, 18, 1); | |
286 | } | |
287 | ||
c4307285 | 288 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
b97bf3fd PL |
289 | { |
290 | msg_set_bits(m, 0, 18, 1, d); | |
291 | } | |
292 | ||
c55c8eda HL |
293 | static inline bool msg_is_rcast(struct tipc_msg *m) |
294 | { | |
295 | return msg_bits(m, 0, 18, 0x1); | |
296 | } | |
297 | ||
298 | static inline void msg_set_is_rcast(struct tipc_msg *m, bool d) | |
299 | { | |
300 | msg_set_bits(m, 0, 18, 0x1, d); | |
301 | } | |
302 | ||
b97bf3fd PL |
303 | static inline void msg_set_size(struct tipc_msg *m, u32 sz) |
304 | { | |
305 | m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); | |
306 | } | |
307 | ||
3127a020 JPM |
308 | static inline unchar *msg_data(struct tipc_msg *m) |
309 | { | |
310 | return ((unchar *)m) + msg_hdr_sz(m); | |
311 | } | |
312 | ||
a7dc51ad | 313 | static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m) |
3127a020 JPM |
314 | { |
315 | return (struct tipc_msg *)msg_data(m); | |
316 | } | |
b97bf3fd | 317 | |
c4307285 | 318 | /* |
b97bf3fd PL |
319 | * Word 1 |
320 | */ | |
d265fef6 AS |
321 | static inline u32 msg_type(struct tipc_msg *m) |
322 | { | |
323 | return msg_bits(m, 1, 29, 0x7); | |
324 | } | |
325 | ||
c4307285 | 326 | static inline void msg_set_type(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
327 | { |
328 | msg_set_bits(m, 1, 29, 0x7, n); | |
329 | } | |
330 | ||
75da2163 JM |
331 | static inline int msg_in_group(struct tipc_msg *m) |
332 | { | |
ae236fb2 JM |
333 | int mtyp = msg_type(m); |
334 | ||
27bd9ec0 | 335 | return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG; |
ae236fb2 JM |
336 | } |
337 | ||
338 | static inline bool msg_is_grp_evt(struct tipc_msg *m) | |
339 | { | |
340 | return msg_type(m) == TIPC_GRP_MEMBER_EVT; | |
75da2163 JM |
341 | } |
342 | ||
d265fef6 AS |
343 | static inline u32 msg_named(struct tipc_msg *m) |
344 | { | |
345 | return msg_type(m) == TIPC_NAMED_MSG; | |
346 | } | |
347 | ||
348 | static inline u32 msg_mcast(struct tipc_msg *m) | |
349 | { | |
75da2163 JM |
350 | int mtyp = msg_type(m); |
351 | ||
5b8dddb6 JM |
352 | return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) || |
353 | (mtyp == TIPC_GRP_MCAST_MSG)); | |
d265fef6 AS |
354 | } |
355 | ||
356 | static inline u32 msg_connected(struct tipc_msg *m) | |
357 | { | |
358 | return msg_type(m) == TIPC_CONN_MSG; | |
359 | } | |
360 | ||
361 | static inline u32 msg_errcode(struct tipc_msg *m) | |
362 | { | |
363 | return msg_bits(m, 1, 25, 0xf); | |
364 | } | |
365 | ||
c4307285 | 366 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
b97bf3fd PL |
367 | { |
368 | msg_set_bits(m, 1, 25, 0xf, err); | |
369 | } | |
370 | ||
c4307285 | 371 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
372 | { |
373 | return msg_bits(m, 1, 21, 0xf); | |
374 | } | |
375 | ||
c4307285 | 376 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
377 | { |
378 | msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1); | |
379 | } | |
380 | ||
c4307285 | 381 | static inline void msg_reset_reroute_cnt(struct tipc_msg *m) |
b97bf3fd PL |
382 | { |
383 | msg_set_bits(m, 1, 21, 0xf, 0); | |
384 | } | |
385 | ||
386 | static inline u32 msg_lookup_scope(struct tipc_msg *m) | |
387 | { | |
388 | return msg_bits(m, 1, 19, 0x3); | |
389 | } | |
390 | ||
c4307285 | 391 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
392 | { |
393 | msg_set_bits(m, 1, 19, 0x3, n); | |
394 | } | |
395 | ||
e4bf4f76 | 396 | static inline u16 msg_bcast_ack(struct tipc_msg *m) |
b97bf3fd PL |
397 | { |
398 | return msg_bits(m, 1, 0, 0xffff); | |
399 | } | |
400 | ||
e4bf4f76 | 401 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
402 | { |
403 | msg_set_bits(m, 1, 0, 0xffff, n); | |
404 | } | |
405 | ||
91986ee1 TL |
406 | /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch |
407 | * link peer session number | |
408 | */ | |
409 | static inline bool msg_dest_session_valid(struct tipc_msg *m) | |
410 | { | |
411 | return msg_bits(m, 1, 16, 0x1); | |
412 | } | |
413 | ||
414 | static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid) | |
415 | { | |
416 | msg_set_bits(m, 1, 16, 0x1, valid); | |
417 | } | |
418 | ||
419 | static inline u16 msg_dest_session(struct tipc_msg *m) | |
420 | { | |
421 | return msg_bits(m, 1, 0, 0xffff); | |
422 | } | |
423 | ||
424 | static inline void msg_set_dest_session(struct tipc_msg *m, u16 n) | |
425 | { | |
426 | msg_set_bits(m, 1, 0, 0xffff, n); | |
427 | } | |
b97bf3fd | 428 | |
c4307285 | 429 | /* |
b97bf3fd PL |
430 | * Word 2 |
431 | */ | |
e4bf4f76 | 432 | static inline u16 msg_ack(struct tipc_msg *m) |
b97bf3fd PL |
433 | { |
434 | return msg_bits(m, 2, 16, 0xffff); | |
435 | } | |
436 | ||
e4bf4f76 | 437 | static inline void msg_set_ack(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
438 | { |
439 | msg_set_bits(m, 2, 16, 0xffff, n); | |
440 | } | |
441 | ||
e4bf4f76 | 442 | static inline u16 msg_seqno(struct tipc_msg *m) |
b97bf3fd PL |
443 | { |
444 | return msg_bits(m, 2, 0, 0xffff); | |
445 | } | |
446 | ||
e4bf4f76 | 447 | static inline void msg_set_seqno(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
448 | { |
449 | msg_set_bits(m, 2, 0, 0xffff, n); | |
450 | } | |
451 | ||
c4307285 | 452 | /* |
b97bf3fd PL |
453 | * Words 3-10 |
454 | */ | |
e3eea1eb JPM |
455 | static inline u32 msg_importance(struct tipc_msg *m) |
456 | { | |
f21e897e JPM |
457 | int usr = msg_user(m); |
458 | ||
459 | if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m))) | |
460 | return usr; | |
461 | if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)) | |
dde4b5ae | 462 | return msg_bits(m, 9, 0, 0x7); |
e3eea1eb JPM |
463 | return TIPC_SYSTEM_IMPORTANCE; |
464 | } | |
465 | ||
466 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) | |
467 | { | |
f21e897e JPM |
468 | int usr = msg_user(m); |
469 | ||
470 | if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))) | |
dde4b5ae | 471 | msg_set_bits(m, 9, 0, 0x7, i); |
f21e897e | 472 | else if (i < TIPC_SYSTEM_IMPORTANCE) |
e3eea1eb JPM |
473 | msg_set_user(m, i); |
474 | else | |
475 | pr_warn("Trying to set illegal importance in message\n"); | |
476 | } | |
477 | ||
d265fef6 AS |
478 | static inline u32 msg_prevnode(struct tipc_msg *m) |
479 | { | |
480 | return msg_word(m, 3); | |
481 | } | |
482 | ||
c4307285 | 483 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
484 | { |
485 | msg_set_word(m, 3, a); | |
486 | } | |
487 | ||
d265fef6 AS |
488 | static inline u32 msg_origport(struct tipc_msg *m) |
489 | { | |
3127a020 | 490 | if (msg_user(m) == MSG_FRAGMENTER) |
a7dc51ad | 491 | m = msg_inner_hdr(m); |
d265fef6 AS |
492 | return msg_word(m, 4); |
493 | } | |
494 | ||
c4307285 | 495 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
496 | { |
497 | msg_set_word(m, 4, p); | |
498 | } | |
499 | ||
d265fef6 AS |
500 | static inline u32 msg_destport(struct tipc_msg *m) |
501 | { | |
502 | return msg_word(m, 5); | |
503 | } | |
504 | ||
c4307285 | 505 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
506 | { |
507 | msg_set_word(m, 5, p); | |
508 | } | |
509 | ||
d265fef6 AS |
510 | static inline u32 msg_mc_netid(struct tipc_msg *m) |
511 | { | |
512 | return msg_word(m, 5); | |
513 | } | |
514 | ||
c4307285 | 515 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
b97bf3fd PL |
516 | { |
517 | msg_set_word(m, 5, p); | |
518 | } | |
519 | ||
d265fef6 AS |
520 | static inline int msg_short(struct tipc_msg *m) |
521 | { | |
741d9eb7 | 522 | return msg_hdr_sz(m) == SHORT_H_SIZE; |
d265fef6 AS |
523 | } |
524 | ||
525 | static inline u32 msg_orignode(struct tipc_msg *m) | |
526 | { | |
527 | if (likely(msg_short(m))) | |
528 | return msg_prevnode(m); | |
529 | return msg_word(m, 6); | |
530 | } | |
531 | ||
c4307285 | 532 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
533 | { |
534 | msg_set_word(m, 6, a); | |
535 | } | |
536 | ||
d265fef6 AS |
537 | static inline u32 msg_destnode(struct tipc_msg *m) |
538 | { | |
539 | return msg_word(m, 7); | |
540 | } | |
541 | ||
c4307285 | 542 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
b97bf3fd PL |
543 | { |
544 | msg_set_word(m, 7, a); | |
545 | } | |
546 | ||
d265fef6 AS |
547 | static inline u32 msg_nametype(struct tipc_msg *m) |
548 | { | |
549 | return msg_word(m, 8); | |
550 | } | |
551 | ||
c4307285 | 552 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
553 | { |
554 | msg_set_word(m, 8, n); | |
555 | } | |
556 | ||
d265fef6 AS |
557 | static inline u32 msg_nameinst(struct tipc_msg *m) |
558 | { | |
559 | return msg_word(m, 9); | |
560 | } | |
561 | ||
562 | static inline u32 msg_namelower(struct tipc_msg *m) | |
563 | { | |
564 | return msg_nameinst(m); | |
565 | } | |
566 | ||
c4307285 | 567 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
568 | { |
569 | msg_set_word(m, 9, n); | |
570 | } | |
571 | ||
c4307285 | 572 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
573 | { |
574 | msg_set_namelower(m, n); | |
575 | } | |
576 | ||
d265fef6 AS |
577 | static inline u32 msg_nameupper(struct tipc_msg *m) |
578 | { | |
579 | return msg_word(m, 10); | |
580 | } | |
581 | ||
c4307285 | 582 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
583 | { |
584 | msg_set_word(m, 10, n); | |
585 | } | |
586 | ||
b97bf3fd | 587 | /* |
cc4c4353 AS |
588 | * Constants and routines used to read and write TIPC internal message headers |
589 | */ | |
b97bf3fd | 590 | |
c4307285 | 591 | /* |
cc4c4353 | 592 | * Connection management protocol message types |
b97bf3fd | 593 | */ |
b97bf3fd PL |
594 | #define CONN_PROBE 0 |
595 | #define CONN_PROBE_REPLY 1 | |
596 | #define CONN_ACK 2 | |
597 | ||
c4307285 | 598 | /* |
cc4c4353 | 599 | * Name distributor message types |
b97bf3fd | 600 | */ |
b97bf3fd PL |
601 | #define PUBLICATION 0 |
602 | #define WITHDRAWAL 1 | |
603 | ||
92138d1f AS |
604 | /* |
605 | * Segmentation message types | |
606 | */ | |
92138d1f AS |
607 | #define FIRST_FRAGMENT 0 |
608 | #define FRAGMENT 1 | |
609 | #define LAST_FRAGMENT 2 | |
610 | ||
611 | /* | |
612 | * Link management protocol message types | |
613 | */ | |
92138d1f AS |
614 | #define STATE_MSG 0 |
615 | #define RESET_MSG 1 | |
616 | #define ACTIVATE_MSG 2 | |
617 | ||
618 | /* | |
619 | * Changeover tunnel message types | |
620 | */ | |
dff29b1a JPM |
621 | #define SYNCH_MSG 0 |
622 | #define FAILOVER_MSG 1 | |
92138d1f AS |
623 | |
624 | /* | |
625 | * Config protocol message types | |
626 | */ | |
92138d1f AS |
627 | #define DSC_REQ_MSG 0 |
628 | #define DSC_RESP_MSG 1 | |
25b0b9c4 JM |
629 | #define DSC_TRIAL_MSG 2 |
630 | #define DSC_TRIAL_FAIL_MSG 3 | |
92138d1f | 631 | |
75da2163 JM |
632 | /* |
633 | * Group protocol message types | |
634 | */ | |
635 | #define GRP_JOIN_MSG 0 | |
636 | #define GRP_LEAVE_MSG 1 | |
b7d42635 | 637 | #define GRP_ADV_MSG 2 |
2f487712 | 638 | #define GRP_ACK_MSG 3 |
04d7b574 JM |
639 | #define GRP_RECLAIM_MSG 4 |
640 | #define GRP_REMIT_MSG 5 | |
75da2163 | 641 | |
c4307285 | 642 | /* |
b97bf3fd PL |
643 | * Word 1 |
644 | */ | |
b97bf3fd PL |
645 | static inline u32 msg_seq_gap(struct tipc_msg *m) |
646 | { | |
bd784533 | 647 | return msg_bits(m, 1, 16, 0x1fff); |
b97bf3fd PL |
648 | } |
649 | ||
650 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) | |
651 | { | |
bd784533 | 652 | msg_set_bits(m, 1, 16, 0x1fff, n); |
b97bf3fd PL |
653 | } |
654 | ||
fc0eea69 AS |
655 | static inline u32 msg_node_sig(struct tipc_msg *m) |
656 | { | |
657 | return msg_bits(m, 1, 0, 0xffff); | |
658 | } | |
659 | ||
660 | static inline void msg_set_node_sig(struct tipc_msg *m, u32 n) | |
661 | { | |
662 | msg_set_bits(m, 1, 0, 0xffff, n); | |
663 | } | |
664 | ||
7764d6e8 JPM |
665 | static inline u32 msg_node_capabilities(struct tipc_msg *m) |
666 | { | |
667 | return msg_bits(m, 1, 15, 0x1fff); | |
668 | } | |
669 | ||
670 | static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n) | |
671 | { | |
672 | msg_set_bits(m, 1, 15, 0x1fff, n); | |
673 | } | |
674 | ||
c4307285 | 675 | /* |
b97bf3fd PL |
676 | * Word 2 |
677 | */ | |
b97bf3fd PL |
678 | static inline u32 msg_dest_domain(struct tipc_msg *m) |
679 | { | |
680 | return msg_word(m, 2); | |
681 | } | |
682 | ||
c4307285 | 683 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
684 | { |
685 | msg_set_word(m, 2, n); | |
686 | } | |
687 | ||
688 | static inline u32 msg_bcgap_after(struct tipc_msg *m) | |
689 | { | |
690 | return msg_bits(m, 2, 16, 0xffff); | |
691 | } | |
692 | ||
693 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) | |
694 | { | |
695 | msg_set_bits(m, 2, 16, 0xffff, n); | |
696 | } | |
697 | ||
698 | static inline u32 msg_bcgap_to(struct tipc_msg *m) | |
699 | { | |
700 | return msg_bits(m, 2, 0, 0xffff); | |
701 | } | |
702 | ||
c4307285 | 703 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
704 | { |
705 | msg_set_bits(m, 2, 0, 0xffff, n); | |
706 | } | |
707 | ||
c4307285 | 708 | /* |
b97bf3fd PL |
709 | * Word 4 |
710 | */ | |
b97bf3fd PL |
711 | static inline u32 msg_last_bcast(struct tipc_msg *m) |
712 | { | |
713 | return msg_bits(m, 4, 16, 0xffff); | |
714 | } | |
715 | ||
52666986 JPM |
716 | static inline u32 msg_bc_snd_nxt(struct tipc_msg *m) |
717 | { | |
718 | return msg_last_bcast(m) + 1; | |
719 | } | |
720 | ||
b97bf3fd PL |
721 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) |
722 | { | |
723 | msg_set_bits(m, 4, 16, 0xffff, n); | |
724 | } | |
725 | ||
b97bf3fd PL |
726 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) |
727 | { | |
728 | msg_set_bits(m, 4, 16, 0xffff, n); | |
729 | } | |
730 | ||
731 | ||
6e498158 | 732 | static inline u16 msg_next_sent(struct tipc_msg *m) |
b97bf3fd PL |
733 | { |
734 | return msg_bits(m, 4, 0, 0xffff); | |
735 | } | |
736 | ||
6e498158 | 737 | static inline void msg_set_next_sent(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
738 | { |
739 | msg_set_bits(m, 4, 0, 0xffff, n); | |
740 | } | |
741 | ||
b97bf3fd PL |
742 | static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n) |
743 | { | |
744 | msg_set_bits(m, 4, 0, 0xffff, n); | |
745 | } | |
746 | ||
747 | static inline u32 msg_bc_netid(struct tipc_msg *m) | |
748 | { | |
749 | return msg_word(m, 4); | |
750 | } | |
751 | ||
752 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) | |
753 | { | |
754 | msg_set_word(m, 4, id); | |
755 | } | |
756 | ||
757 | static inline u32 msg_link_selector(struct tipc_msg *m) | |
758 | { | |
a853e4c6 JPM |
759 | if (msg_user(m) == MSG_FRAGMENTER) |
760 | m = (void *)msg_data(m); | |
b97bf3fd PL |
761 | return msg_bits(m, 4, 0, 1); |
762 | } | |
763 | ||
c4307285 | 764 | /* |
b97bf3fd PL |
765 | * Word 5 |
766 | */ | |
d999297c | 767 | static inline u16 msg_session(struct tipc_msg *m) |
b97bf3fd PL |
768 | { |
769 | return msg_bits(m, 5, 16, 0xffff); | |
770 | } | |
771 | ||
d999297c | 772 | static inline void msg_set_session(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
773 | { |
774 | msg_set_bits(m, 5, 16, 0xffff, n); | |
775 | } | |
776 | ||
777 | static inline u32 msg_probe(struct tipc_msg *m) | |
778 | { | |
779 | return msg_bits(m, 5, 0, 1); | |
780 | } | |
781 | ||
782 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) | |
783 | { | |
7eb878ed | 784 | msg_set_bits(m, 5, 0, 1, val); |
b97bf3fd PL |
785 | } |
786 | ||
787 | static inline char msg_net_plane(struct tipc_msg *m) | |
788 | { | |
789 | return msg_bits(m, 5, 1, 7) + 'A'; | |
790 | } | |
791 | ||
792 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) | |
793 | { | |
794 | msg_set_bits(m, 5, 1, 7, (n - 'A')); | |
795 | } | |
796 | ||
797 | static inline u32 msg_linkprio(struct tipc_msg *m) | |
798 | { | |
799 | return msg_bits(m, 5, 4, 0x1f); | |
800 | } | |
801 | ||
802 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) | |
803 | { | |
804 | msg_set_bits(m, 5, 4, 0x1f, n); | |
805 | } | |
806 | ||
807 | static inline u32 msg_bearer_id(struct tipc_msg *m) | |
808 | { | |
809 | return msg_bits(m, 5, 9, 0x7); | |
810 | } | |
811 | ||
812 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) | |
813 | { | |
814 | msg_set_bits(m, 5, 9, 0x7, n); | |
815 | } | |
816 | ||
817 | static inline u32 msg_redundant_link(struct tipc_msg *m) | |
818 | { | |
819 | return msg_bits(m, 5, 12, 0x1); | |
820 | } | |
821 | ||
77f167fc | 822 | static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r) |
b97bf3fd | 823 | { |
77f167fc | 824 | msg_set_bits(m, 5, 12, 0x1, r); |
b97bf3fd PL |
825 | } |
826 | ||
634696b1 JPM |
827 | static inline u32 msg_peer_stopping(struct tipc_msg *m) |
828 | { | |
829 | return msg_bits(m, 5, 13, 0x1); | |
830 | } | |
831 | ||
832 | static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s) | |
833 | { | |
834 | msg_set_bits(m, 5, 13, 0x1, s); | |
835 | } | |
836 | ||
06bd2b1e JPM |
837 | static inline bool msg_bc_ack_invalid(struct tipc_msg *m) |
838 | { | |
839 | switch (msg_user(m)) { | |
840 | case BCAST_PROTOCOL: | |
841 | case NAME_DISTRIBUTOR: | |
842 | case LINK_PROTOCOL: | |
843 | return msg_bits(m, 5, 14, 0x1); | |
844 | default: | |
845 | return false; | |
846 | } | |
847 | } | |
848 | ||
849 | static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid) | |
850 | { | |
851 | msg_set_bits(m, 5, 14, 0x1, invalid); | |
852 | } | |
853 | ||
3d749a6a AS |
854 | static inline char *msg_media_addr(struct tipc_msg *m) |
855 | { | |
91e2eb56 | 856 | return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET]; |
3d749a6a | 857 | } |
b97bf3fd | 858 | |
02d11ca2 JPM |
859 | static inline u32 msg_bc_gap(struct tipc_msg *m) |
860 | { | |
861 | return msg_bits(m, 8, 0, 0x3ff); | |
862 | } | |
863 | ||
864 | static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n) | |
865 | { | |
866 | msg_set_bits(m, 8, 0, 0x3ff, n); | |
867 | } | |
868 | ||
c4307285 | 869 | /* |
b97bf3fd PL |
870 | * Word 9 |
871 | */ | |
6e498158 | 872 | static inline u16 msg_msgcnt(struct tipc_msg *m) |
b97bf3fd PL |
873 | { |
874 | return msg_bits(m, 9, 16, 0xffff); | |
875 | } | |
876 | ||
6e498158 | 877 | static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n) |
b97bf3fd PL |
878 | { |
879 | msg_set_bits(m, 9, 16, 0xffff, n); | |
880 | } | |
881 | ||
10724cc7 | 882 | static inline u32 msg_conn_ack(struct tipc_msg *m) |
b97bf3fd PL |
883 | { |
884 | return msg_bits(m, 9, 16, 0xffff); | |
885 | } | |
886 | ||
10724cc7 | 887 | static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
888 | { |
889 | msg_set_bits(m, 9, 16, 0xffff, n); | |
890 | } | |
891 | ||
b7d42635 | 892 | static inline u16 msg_adv_win(struct tipc_msg *m) |
10724cc7 JPM |
893 | { |
894 | return msg_bits(m, 9, 0, 0xffff); | |
895 | } | |
896 | ||
b7d42635 | 897 | static inline void msg_set_adv_win(struct tipc_msg *m, u16 n) |
10724cc7 JPM |
898 | { |
899 | msg_set_bits(m, 9, 0, 0xffff, n); | |
900 | } | |
901 | ||
c4307285 | 902 | static inline u32 msg_max_pkt(struct tipc_msg *m) |
b97bf3fd | 903 | { |
a02cec21 | 904 | return msg_bits(m, 9, 16, 0xffff) * 4; |
b97bf3fd PL |
905 | } |
906 | ||
c4307285 | 907 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
b97bf3fd PL |
908 | { |
909 | msg_set_bits(m, 9, 16, 0xffff, (n / 4)); | |
910 | } | |
911 | ||
912 | static inline u32 msg_link_tolerance(struct tipc_msg *m) | |
913 | { | |
914 | return msg_bits(m, 9, 0, 0xffff); | |
915 | } | |
916 | ||
917 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) | |
918 | { | |
919 | msg_set_bits(m, 9, 0, 0xffff, n); | |
920 | } | |
921 | ||
75da2163 JM |
922 | static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m) |
923 | { | |
924 | return msg_bits(m, 9, 16, 0xffff); | |
925 | } | |
926 | ||
927 | static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n) | |
928 | { | |
929 | msg_set_bits(m, 9, 16, 0xffff, n); | |
930 | } | |
931 | ||
2f487712 JM |
932 | static inline u16 msg_grp_bc_acked(struct tipc_msg *m) |
933 | { | |
934 | return msg_bits(m, 9, 16, 0xffff); | |
935 | } | |
936 | ||
937 | static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n) | |
938 | { | |
939 | msg_set_bits(m, 9, 16, 0xffff, n); | |
940 | } | |
941 | ||
04d7b574 JM |
942 | static inline u16 msg_grp_remitted(struct tipc_msg *m) |
943 | { | |
944 | return msg_bits(m, 9, 16, 0xffff); | |
945 | } | |
946 | ||
947 | static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n) | |
948 | { | |
949 | msg_set_bits(m, 9, 16, 0xffff, n); | |
950 | } | |
951 | ||
75da2163 JM |
952 | /* Word 10 |
953 | */ | |
ae236fb2 JM |
954 | static inline u16 msg_grp_evt(struct tipc_msg *m) |
955 | { | |
956 | return msg_bits(m, 10, 0, 0x3); | |
957 | } | |
958 | ||
959 | static inline void msg_set_grp_evt(struct tipc_msg *m, int n) | |
960 | { | |
961 | msg_set_bits(m, 10, 0, 0x3, n); | |
962 | } | |
963 | ||
2f487712 JM |
964 | static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m) |
965 | { | |
966 | return msg_bits(m, 10, 0, 0x1); | |
967 | } | |
968 | ||
969 | static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n) | |
970 | { | |
971 | msg_set_bits(m, 10, 0, 0x1, n); | |
972 | } | |
973 | ||
75da2163 JM |
974 | static inline u16 msg_grp_bc_seqno(struct tipc_msg *m) |
975 | { | |
976 | return msg_bits(m, 10, 16, 0xffff); | |
977 | } | |
978 | ||
979 | static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n) | |
980 | { | |
981 | msg_set_bits(m, 10, 16, 0xffff, n); | |
982 | } | |
983 | ||
6e498158 | 984 | static inline bool msg_peer_link_is_up(struct tipc_msg *m) |
1a20cc25 | 985 | { |
d999297c | 986 | if (likely(msg_user(m) != LINK_PROTOCOL)) |
1a20cc25 | 987 | return true; |
6e498158 JPM |
988 | if (msg_type(m) == STATE_MSG) |
989 | return true; | |
990 | return false; | |
d999297c JPM |
991 | } |
992 | ||
6e498158 | 993 | static inline bool msg_peer_node_is_up(struct tipc_msg *m) |
d999297c | 994 | { |
6e498158 JPM |
995 | if (msg_peer_link_is_up(m)) |
996 | return true; | |
1a20cc25 JPM |
997 | return msg_redundant_link(m); |
998 | } | |
999 | ||
5b7066c3 JPM |
1000 | static inline bool msg_is_reset(struct tipc_msg *hdr) |
1001 | { | |
1002 | return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG); | |
1003 | } | |
1004 | ||
25b0b9c4 JM |
1005 | static inline u32 msg_sugg_node_addr(struct tipc_msg *m) |
1006 | { | |
1007 | return msg_word(m, 14); | |
1008 | } | |
1009 | ||
1010 | static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n) | |
1011 | { | |
1012 | msg_set_word(m, 14, n); | |
1013 | } | |
1014 | ||
1015 | static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id) | |
1016 | { | |
1017 | memcpy(msg_data(hdr), id, 16); | |
1018 | } | |
1019 | ||
1020 | static inline u8 *msg_node_id(struct tipc_msg *hdr) | |
1021 | { | |
1022 | return (u8 *)msg_data(hdr); | |
1023 | } | |
1024 | ||
57d5f64d | 1025 | struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp); |
d618d09a | 1026 | bool tipc_msg_validate(struct sk_buff **_skb); |
bcd3ffd4 | 1027 | bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err); |
64ac5f59 JM |
1028 | void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb, |
1029 | struct sk_buff_head *xmitq); | |
c5898636 | 1030 | void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type, |
34747539 | 1031 | u32 hsize, u32 destnode); |
e3a77561 JPM |
1032 | struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, |
1033 | uint data_sz, u32 dnode, u32 onode, | |
1034 | u32 dport, u32 oport, int errcode); | |
37e22164 | 1035 | int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf); |
dd3f9e70 JPM |
1036 | bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu); |
1037 | bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg, | |
1038 | u32 mtu, u32 dnode); | |
c637c103 | 1039 | bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos); |
c5898636 | 1040 | int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, |
34747539 | 1041 | int offset, int dsz, int mtu, struct sk_buff_head *list); |
cda3696d | 1042 | bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err); |
4c94cc2d | 1043 | bool tipc_msg_assemble(struct sk_buff_head *list); |
2f566124 | 1044 | bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq); |
a853e4c6 JPM |
1045 | bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg, |
1046 | struct sk_buff_head *cpy); | |
8306f99a JPM |
1047 | void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno, |
1048 | struct sk_buff *skb); | |
67879274 | 1049 | bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy); |
078bec82 | 1050 | |
e4bf4f76 JPM |
1051 | static inline u16 buf_seqno(struct sk_buff *skb) |
1052 | { | |
1053 | return msg_seqno(buf_msg(skb)); | |
1054 | } | |
1055 | ||
d618d09a JM |
1056 | static inline int buf_roundup_len(struct sk_buff *skb) |
1057 | { | |
1058 | return (skb->len / 1024 + 1) * 1024; | |
1059 | } | |
1060 | ||
cb1b7280 JPM |
1061 | /* tipc_skb_peek(): peek and reserve first buffer in list |
1062 | * @list: list to be peeked in | |
1063 | * Returns pointer to first buffer in list, if any | |
1064 | */ | |
1065 | static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list, | |
1066 | spinlock_t *lock) | |
1067 | { | |
1068 | struct sk_buff *skb; | |
1069 | ||
1070 | spin_lock_bh(lock); | |
1071 | skb = skb_peek(list); | |
1072 | if (skb) | |
1073 | skb_get(skb); | |
1074 | spin_unlock_bh(lock); | |
1075 | return skb; | |
1076 | } | |
1077 | ||
c637c103 JPM |
1078 | /* tipc_skb_peek_port(): find a destination port, ignoring all destinations |
1079 | * up to and including 'filter'. | |
1080 | * Note: ignoring previously tried destinations minimizes the risk of | |
1081 | * contention on the socket lock | |
1082 | * @list: list to be peeked in | |
1083 | * @filter: last destination to be ignored from search | |
1084 | * Returns a destination port number, of applicable. | |
1085 | */ | |
1086 | static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter) | |
1087 | { | |
1088 | struct sk_buff *skb; | |
1089 | u32 dport = 0; | |
1090 | bool ignore = true; | |
1091 | ||
1092 | spin_lock_bh(&list->lock); | |
1093 | skb_queue_walk(list, skb) { | |
1094 | dport = msg_destport(buf_msg(skb)); | |
1095 | if (!filter || skb_queue_is_last(list, skb)) | |
1096 | break; | |
1097 | if (dport == filter) | |
1098 | ignore = false; | |
1099 | else if (!ignore) | |
1100 | break; | |
1101 | } | |
1102 | spin_unlock_bh(&list->lock); | |
1103 | return dport; | |
1104 | } | |
1105 | ||
1106 | /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list | |
1107 | * @list: list to be unlinked from | |
1108 | * @dport: selection criteria for buffer to unlink | |
1109 | */ | |
1110 | static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list, | |
1111 | u32 dport) | |
1112 | { | |
1113 | struct sk_buff *_skb, *tmp, *skb = NULL; | |
1114 | ||
1115 | spin_lock_bh(&list->lock); | |
1116 | skb_queue_walk_safe(list, _skb, tmp) { | |
1117 | if (msg_destport(buf_msg(_skb)) == dport) { | |
1118 | __skb_unlink(_skb, list); | |
1119 | skb = _skb; | |
1120 | break; | |
1121 | } | |
1122 | } | |
1123 | spin_unlock_bh(&list->lock); | |
1124 | return skb; | |
1125 | } | |
1126 | ||
598411d7 JPM |
1127 | /* tipc_skb_queue_splice_tail - append an skb list to lock protected list |
1128 | * @list: the new list to append. Not lock protected | |
1129 | * @head: target list. Lock protected. | |
1130 | */ | |
1131 | static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list, | |
1132 | struct sk_buff_head *head) | |
1133 | { | |
1134 | spin_lock_bh(&head->lock); | |
1135 | skb_queue_splice_tail(list, head); | |
1136 | spin_unlock_bh(&head->lock); | |
1137 | } | |
1138 | ||
1139 | /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists | |
1140 | * @list: the new list to add. Lock protected. Will be reinitialized | |
1141 | * @head: target list. Lock protected. | |
1142 | */ | |
1143 | static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list, | |
1144 | struct sk_buff_head *head) | |
1145 | { | |
1146 | struct sk_buff_head tmp; | |
1147 | ||
1148 | __skb_queue_head_init(&tmp); | |
1149 | ||
1150 | spin_lock_bh(&list->lock); | |
1151 | skb_queue_splice_tail_init(list, &tmp); | |
1152 | spin_unlock_bh(&list->lock); | |
1153 | tipc_skb_queue_splice_tail(&tmp, head); | |
1154 | } | |
1155 | ||
382f598f TL |
1156 | /* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno |
1157 | * @list: list to be dequeued from | |
1158 | * @seqno: seqno of the expected msg | |
1159 | * | |
1160 | * returns skb dequeued from the list if its seqno is less than or equal to | |
1161 | * the expected one, otherwise the skb is still hold | |
1162 | * | |
1163 | * Note: must be used with appropriate locks held only | |
1164 | */ | |
1165 | static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list, | |
1166 | u16 seqno) | |
1167 | { | |
1168 | struct sk_buff *skb = skb_peek(list); | |
1169 | ||
1170 | if (skb && less_eq(buf_seqno(skb), seqno)) { | |
1171 | __skb_unlink(skb, list); | |
1172 | return skb; | |
1173 | } | |
1174 | return NULL; | |
1175 | } | |
1176 | ||
b97bf3fd | 1177 | #endif |