1 | /* |
2 | * net/tipc/msg.h: Include file for TIPC message header routines |
3 | * |
4 | * Copyright (c) 2000-2007, 2014-2017 Ericsson AB |
5 | * Copyright (c) 2005-2008, 2010-2011, Wind River Systems |
6 | * All rights reserved. |
7 | * |
8 | * Redistribution and use in source and binary forms, with or without |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * |
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. |
19 | * |
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 |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ |
36 | |
37 | #ifndef _TIPC_MSG_H |
38 | #define _TIPC_MSG_H |
39 | |
40 | #include <linux/tipc.h> |
41 | #include "core.h" |
42 | |
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 | */ |
48 | #define TIPC_VERSION 2 |
49 | struct plist; |
50 | |
51 | /* |
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 | */ |
58 | #define TIPC_SYSTEM_IMPORTANCE 4 |
59 | |
60 | |
61 | /* |
62 | * Payload message types |
63 | */ |
64 | #define TIPC_CONN_MSG 0 |
65 | #define TIPC_MCAST_MSG 1 |
66 | #define TIPC_NAMED_MSG 2 |
67 | #define TIPC_DIRECT_MSG 3 |
68 | #define TIPC_GRP_MEMBER_EVT 4 |
69 | #define TIPC_GRP_BCAST_MSG 5 |
70 | #define TIPC_GRP_MCAST_MSG 6 |
71 | #define TIPC_GRP_UCAST_MSG 7 |
72 | |
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 |
80 | #define GROUP_PROTOCOL 9 |
81 | #define TUNNEL_PROTOCOL 10 |
82 | #define NAME_DISTRIBUTOR 11 |
83 | #define MSG_FRAGMENTER 12 |
84 | #define LINK_CONFIG 13 |
85 | #define MSG_CRYPTO 14 |
86 | #define SOCK_WAKEUP 14 /* pseudo user */ |
87 | #define TOP_SRV 15 /* pseudo user */ |
88 | |
89 | /* |
90 | * Message header sizes |
91 | */ |
92 | #define SHORT_H_SIZE 24 /* In-cluster basic payload message */ |
93 | #define BASIC_H_SIZE 32 /* Basic payload message */ |
94 | #define NAMED_H_SIZE 40 /* Named payload message */ |
95 | #define MCAST_H_SIZE 44 /* Multicast payload message */ |
96 | #define GROUP_H_SIZE 44 /* Group payload message */ |
97 | #define INT_H_SIZE 40 /* Internal messages */ |
98 | #define MIN_H_SIZE 24 /* Smallest legal TIPC header size */ |
99 | #define MAX_H_SIZE 60 /* Largest possible TIPC header size */ |
100 | |
101 | #define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE) |
102 | #define TIPC_MEDIA_INFO_OFFSET 5 |
103 | |
104 | extern const int one_page_mtu; |
105 | |
106 | struct tipc_skb_cb { |
107 | union { |
108 | struct { |
109 | struct sk_buff *tail; |
110 | unsigned long nxt_retr; |
111 | unsigned long retr_stamp; |
112 | u32 bytes_read; |
113 | u32 orig_member; |
114 | u16 chain_imp; |
115 | u16 ackers; |
116 | u16 retr_cnt; |
117 | } __packed; |
118 | #ifdef CONFIG_TIPC_CRYPTO |
119 | struct { |
120 | struct tipc_crypto *rx; |
121 | struct tipc_aead *last; |
122 | u8 recurs; |
123 | } tx_clone_ctx __packed; |
124 | #endif |
125 | } __packed; |
126 | union { |
127 | struct { |
128 | u8 validated:1; |
129 | #ifdef CONFIG_TIPC_CRYPTO |
130 | u8 encrypted:1; |
131 | u8 decrypted:1; |
132 | #define SKB_PROBING 1 |
133 | #define SKB_GRACING 2 |
134 | u8 xmit_type:2; |
135 | u8 tx_clone_deferred:1; |
136 | #endif |
137 | }; |
138 | u8 flags; |
139 | }; |
140 | u8 reserved; |
141 | #ifdef CONFIG_TIPC_CRYPTO |
142 | void *crypto_ctx; |
143 | #endif |
144 | } __packed; |
145 | |
146 | #define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0])) |
147 | |
148 | struct tipc_msg { |
149 | __be32 hdr[15]; |
150 | }; |
151 | |
152 | /* struct tipc_gap_ack - TIPC Gap ACK block |
153 | * @ack: seqno of the last consecutive packet in link deferdq |
154 | * @gap: number of gap packets since the last ack |
155 | * |
156 | * E.g: |
157 | * link deferdq: 1 2 3 4 10 11 13 14 15 20 |
158 | * --> Gap ACK blocks: <4, 5>, <11, 1>, <15, 4>, <20, 0> |
159 | */ |
160 | struct tipc_gap_ack { |
161 | __be16 ack; |
162 | __be16 gap; |
163 | }; |
164 | |
165 | /* struct tipc_gap_ack_blks |
166 | * @len: actual length of the record |
167 | * @ugack_cnt: number of Gap ACK blocks for unicast (following the broadcast |
168 | * ones) |
169 | * @start_index: starting index for "valid" broadcast Gap ACK blocks |
170 | * @bgack_cnt: number of Gap ACK blocks for broadcast in the record |
171 | * @gacks: array of Gap ACK blocks |
172 | * |
173 | * 31 16 15 0 |
174 | * +-------------+-------------+-------------+-------------+ |
175 | * | bgack_cnt | ugack_cnt | len | |
176 | * +-------------+-------------+-------------+-------------+ - |
177 | * | gap | ack | | |
178 | * +-------------+-------------+-------------+-------------+ > bc gacks |
179 | * : : : | |
180 | * +-------------+-------------+-------------+-------------+ - |
181 | * | gap | ack | | |
182 | * +-------------+-------------+-------------+-------------+ > uc gacks |
183 | * : : : | |
184 | * +-------------+-------------+-------------+-------------+ - |
185 | */ |
186 | struct tipc_gap_ack_blks { |
187 | __be16 len; |
188 | union { |
189 | u8 ugack_cnt; |
190 | u8 start_index; |
191 | }; |
192 | u8 bgack_cnt; |
193 | struct tipc_gap_ack gacks[]; |
194 | }; |
195 | |
196 | #define MAX_GAP_ACK_BLKS 128 |
197 | #define MAX_GAP_ACK_BLKS_SZ (sizeof(struct tipc_gap_ack_blks) + \ |
198 | sizeof(struct tipc_gap_ack) * MAX_GAP_ACK_BLKS) |
199 | |
200 | static inline struct tipc_msg *buf_msg(struct sk_buff *skb) |
201 | { |
202 | return (struct tipc_msg *)skb->data; |
203 | } |
204 | |
205 | static inline u32 msg_word(struct tipc_msg *m, u32 pos) |
206 | { |
207 | return ntohl(m->hdr[pos]); |
208 | } |
209 | |
210 | static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val) |
211 | { |
212 | m->hdr[w] = htonl(val); |
213 | } |
214 | |
215 | static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask) |
216 | { |
217 | return (msg_word(m, pos: w) >> pos) & mask; |
218 | } |
219 | |
220 | static inline void msg_set_bits(struct tipc_msg *m, u32 w, |
221 | u32 pos, u32 mask, u32 val) |
222 | { |
223 | val = (val & mask) << pos; |
224 | mask = mask << pos; |
225 | m->hdr[w] &= ~htonl(mask); |
226 | m->hdr[w] |= htonl(val); |
227 | } |
228 | |
229 | /* |
230 | * Word 0 |
231 | */ |
232 | static inline u32 msg_version(struct tipc_msg *m) |
233 | { |
234 | return msg_bits(m, w: 0, pos: 29, mask: 7); |
235 | } |
236 | |
237 | static inline void msg_set_version(struct tipc_msg *m) |
238 | { |
239 | msg_set_bits(m, w: 0, pos: 29, mask: 7, TIPC_VERSION); |
240 | } |
241 | |
242 | static inline u32 msg_user(struct tipc_msg *m) |
243 | { |
244 | return msg_bits(m, w: 0, pos: 25, mask: 0xf); |
245 | } |
246 | |
247 | static inline u32 msg_isdata(struct tipc_msg *m) |
248 | { |
249 | return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE; |
250 | } |
251 | |
252 | static inline void msg_set_user(struct tipc_msg *m, u32 n) |
253 | { |
254 | msg_set_bits(m, w: 0, pos: 25, mask: 0xf, val: n); |
255 | } |
256 | |
257 | static inline u32 msg_hdr_sz(struct tipc_msg *m) |
258 | { |
259 | return msg_bits(m, w: 0, pos: 21, mask: 0xf) << 2; |
260 | } |
261 | |
262 | static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n) |
263 | { |
264 | msg_set_bits(m, w: 0, pos: 21, mask: 0xf, val: n>>2); |
265 | } |
266 | |
267 | static inline u32 msg_size(struct tipc_msg *m) |
268 | { |
269 | return msg_bits(m, w: 0, pos: 0, mask: 0x1ffff); |
270 | } |
271 | |
272 | static inline u32 msg_blocks(struct tipc_msg *m) |
273 | { |
274 | return (msg_size(m) / 1024) + 1; |
275 | } |
276 | |
277 | static inline u32 msg_data_sz(struct tipc_msg *m) |
278 | { |
279 | return msg_size(m) - msg_hdr_sz(m); |
280 | } |
281 | |
282 | static inline int msg_non_seq(struct tipc_msg *m) |
283 | { |
284 | return msg_bits(m, w: 0, pos: 20, mask: 1); |
285 | } |
286 | |
287 | static inline void msg_set_non_seq(struct tipc_msg *m, u32 n) |
288 | { |
289 | msg_set_bits(m, w: 0, pos: 20, mask: 1, val: n); |
290 | } |
291 | |
292 | static inline int msg_is_syn(struct tipc_msg *m) |
293 | { |
294 | return msg_bits(m, w: 0, pos: 17, mask: 1); |
295 | } |
296 | |
297 | static inline void msg_set_syn(struct tipc_msg *m, u32 d) |
298 | { |
299 | msg_set_bits(m, w: 0, pos: 17, mask: 1, val: d); |
300 | } |
301 | |
302 | static inline int msg_dest_droppable(struct tipc_msg *m) |
303 | { |
304 | return msg_bits(m, w: 0, pos: 19, mask: 1); |
305 | } |
306 | |
307 | static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d) |
308 | { |
309 | msg_set_bits(m, w: 0, pos: 19, mask: 1, val: d); |
310 | } |
311 | |
312 | static inline int msg_is_keepalive(struct tipc_msg *m) |
313 | { |
314 | return msg_bits(m, w: 0, pos: 19, mask: 1); |
315 | } |
316 | |
317 | static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d) |
318 | { |
319 | msg_set_bits(m, w: 0, pos: 19, mask: 1, val: d); |
320 | } |
321 | |
322 | static inline int msg_src_droppable(struct tipc_msg *m) |
323 | { |
324 | return msg_bits(m, w: 0, pos: 18, mask: 1); |
325 | } |
326 | |
327 | static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d) |
328 | { |
329 | msg_set_bits(m, w: 0, pos: 18, mask: 1, val: d); |
330 | } |
331 | |
332 | static inline int msg_ack_required(struct tipc_msg *m) |
333 | { |
334 | return msg_bits(m, w: 0, pos: 18, mask: 1); |
335 | } |
336 | |
337 | static inline void msg_set_ack_required(struct tipc_msg *m) |
338 | { |
339 | msg_set_bits(m, w: 0, pos: 18, mask: 1, val: 1); |
340 | } |
341 | |
342 | static inline int msg_nagle_ack(struct tipc_msg *m) |
343 | { |
344 | return msg_bits(m, w: 0, pos: 18, mask: 1); |
345 | } |
346 | |
347 | static inline void msg_set_nagle_ack(struct tipc_msg *m) |
348 | { |
349 | msg_set_bits(m, w: 0, pos: 18, mask: 1, val: 1); |
350 | } |
351 | |
352 | static inline bool msg_is_rcast(struct tipc_msg *m) |
353 | { |
354 | return msg_bits(m, w: 0, pos: 18, mask: 0x1); |
355 | } |
356 | |
357 | static inline void msg_set_is_rcast(struct tipc_msg *m, bool d) |
358 | { |
359 | msg_set_bits(m, w: 0, pos: 18, mask: 0x1, val: d); |
360 | } |
361 | |
362 | static inline void msg_set_size(struct tipc_msg *m, u32 sz) |
363 | { |
364 | m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz); |
365 | } |
366 | |
367 | static inline unchar *msg_data(struct tipc_msg *m) |
368 | { |
369 | return ((unchar *)m) + msg_hdr_sz(m); |
370 | } |
371 | |
372 | static inline struct tipc_msg *msg_inner_hdr(struct tipc_msg *m) |
373 | { |
374 | return (struct tipc_msg *)msg_data(m); |
375 | } |
376 | |
377 | /* |
378 | * Word 1 |
379 | */ |
380 | static inline u32 msg_type(struct tipc_msg *m) |
381 | { |
382 | return msg_bits(m, w: 1, pos: 29, mask: 0x7); |
383 | } |
384 | |
385 | static inline void msg_set_type(struct tipc_msg *m, u32 n) |
386 | { |
387 | msg_set_bits(m, w: 1, pos: 29, mask: 0x7, val: n); |
388 | } |
389 | |
390 | static inline int msg_in_group(struct tipc_msg *m) |
391 | { |
392 | int mtyp = msg_type(m); |
393 | |
394 | return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG; |
395 | } |
396 | |
397 | static inline bool msg_is_grp_evt(struct tipc_msg *m) |
398 | { |
399 | return msg_type(m) == TIPC_GRP_MEMBER_EVT; |
400 | } |
401 | |
402 | static inline u32 msg_named(struct tipc_msg *m) |
403 | { |
404 | return msg_type(m) == TIPC_NAMED_MSG; |
405 | } |
406 | |
407 | static inline u32 msg_mcast(struct tipc_msg *m) |
408 | { |
409 | int mtyp = msg_type(m); |
410 | |
411 | return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) || |
412 | (mtyp == TIPC_GRP_MCAST_MSG)); |
413 | } |
414 | |
415 | static inline u32 msg_connected(struct tipc_msg *m) |
416 | { |
417 | return msg_type(m) == TIPC_CONN_MSG; |
418 | } |
419 | |
420 | static inline u32 msg_direct(struct tipc_msg *m) |
421 | { |
422 | return msg_type(m) == TIPC_DIRECT_MSG; |
423 | } |
424 | |
425 | static inline u32 msg_errcode(struct tipc_msg *m) |
426 | { |
427 | return msg_bits(m, w: 1, pos: 25, mask: 0xf); |
428 | } |
429 | |
430 | static inline void msg_set_errcode(struct tipc_msg *m, u32 err) |
431 | { |
432 | msg_set_bits(m, w: 1, pos: 25, mask: 0xf, val: err); |
433 | } |
434 | |
435 | static inline void msg_set_bulk(struct tipc_msg *m) |
436 | { |
437 | msg_set_bits(m, w: 1, pos: 28, mask: 0x1, val: 1); |
438 | } |
439 | |
440 | static inline u32 msg_is_bulk(struct tipc_msg *m) |
441 | { |
442 | return msg_bits(m, w: 1, pos: 28, mask: 0x1); |
443 | } |
444 | |
445 | static inline void msg_set_last_bulk(struct tipc_msg *m) |
446 | { |
447 | msg_set_bits(m, w: 1, pos: 27, mask: 0x1, val: 1); |
448 | } |
449 | |
450 | static inline u32 msg_is_last_bulk(struct tipc_msg *m) |
451 | { |
452 | return msg_bits(m, w: 1, pos: 27, mask: 0x1); |
453 | } |
454 | |
455 | static inline void msg_set_non_legacy(struct tipc_msg *m) |
456 | { |
457 | msg_set_bits(m, w: 1, pos: 26, mask: 0x1, val: 1); |
458 | } |
459 | |
460 | static inline u32 msg_is_legacy(struct tipc_msg *m) |
461 | { |
462 | return !msg_bits(m, w: 1, pos: 26, mask: 0x1); |
463 | } |
464 | |
465 | static inline u32 msg_reroute_cnt(struct tipc_msg *m) |
466 | { |
467 | return msg_bits(m, w: 1, pos: 21, mask: 0xf); |
468 | } |
469 | |
470 | static inline void msg_incr_reroute_cnt(struct tipc_msg *m) |
471 | { |
472 | msg_set_bits(m, w: 1, pos: 21, mask: 0xf, val: msg_reroute_cnt(m) + 1); |
473 | } |
474 | |
475 | static inline u32 msg_lookup_scope(struct tipc_msg *m) |
476 | { |
477 | return msg_bits(m, w: 1, pos: 19, mask: 0x3); |
478 | } |
479 | |
480 | static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n) |
481 | { |
482 | msg_set_bits(m, w: 1, pos: 19, mask: 0x3, val: n); |
483 | } |
484 | |
485 | static inline u16 msg_bcast_ack(struct tipc_msg *m) |
486 | { |
487 | return msg_bits(m, w: 1, pos: 0, mask: 0xffff); |
488 | } |
489 | |
490 | static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n) |
491 | { |
492 | msg_set_bits(m, w: 1, pos: 0, mask: 0xffff, val: n); |
493 | } |
494 | |
495 | /* Note: reusing bits in word 1 for ACTIVATE_MSG only, to re-synch |
496 | * link peer session number |
497 | */ |
498 | static inline bool msg_dest_session_valid(struct tipc_msg *m) |
499 | { |
500 | return msg_bits(m, w: 1, pos: 16, mask: 0x1); |
501 | } |
502 | |
503 | static inline void msg_set_dest_session_valid(struct tipc_msg *m, bool valid) |
504 | { |
505 | msg_set_bits(m, w: 1, pos: 16, mask: 0x1, val: valid); |
506 | } |
507 | |
508 | static inline u16 msg_dest_session(struct tipc_msg *m) |
509 | { |
510 | return msg_bits(m, w: 1, pos: 0, mask: 0xffff); |
511 | } |
512 | |
513 | static inline void msg_set_dest_session(struct tipc_msg *m, u16 n) |
514 | { |
515 | msg_set_bits(m, w: 1, pos: 0, mask: 0xffff, val: n); |
516 | } |
517 | |
518 | /* |
519 | * Word 2 |
520 | */ |
521 | static inline u16 msg_ack(struct tipc_msg *m) |
522 | { |
523 | return msg_bits(m, w: 2, pos: 16, mask: 0xffff); |
524 | } |
525 | |
526 | static inline void msg_set_ack(struct tipc_msg *m, u16 n) |
527 | { |
528 | msg_set_bits(m, w: 2, pos: 16, mask: 0xffff, val: n); |
529 | } |
530 | |
531 | static inline u16 msg_seqno(struct tipc_msg *m) |
532 | { |
533 | return msg_bits(m, w: 2, pos: 0, mask: 0xffff); |
534 | } |
535 | |
536 | static inline void msg_set_seqno(struct tipc_msg *m, u16 n) |
537 | { |
538 | msg_set_bits(m, w: 2, pos: 0, mask: 0xffff, val: n); |
539 | } |
540 | |
541 | /* |
542 | * Words 3-10 |
543 | */ |
544 | static inline u32 msg_importance(struct tipc_msg *m) |
545 | { |
546 | int usr = msg_user(m); |
547 | |
548 | if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m))) |
549 | return usr; |
550 | if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)) |
551 | return msg_bits(m, w: 9, pos: 0, mask: 0x7); |
552 | return TIPC_SYSTEM_IMPORTANCE; |
553 | } |
554 | |
555 | static inline void msg_set_importance(struct tipc_msg *m, u32 i) |
556 | { |
557 | int usr = msg_user(m); |
558 | |
559 | if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))) |
560 | msg_set_bits(m, w: 9, pos: 0, mask: 0x7, val: i); |
561 | else if (i < TIPC_SYSTEM_IMPORTANCE) |
562 | msg_set_user(m, n: i); |
563 | else |
564 | pr_warn("Trying to set illegal importance in message\n" ); |
565 | } |
566 | |
567 | static inline u32 msg_prevnode(struct tipc_msg *m) |
568 | { |
569 | return msg_word(m, pos: 3); |
570 | } |
571 | |
572 | static inline void msg_set_prevnode(struct tipc_msg *m, u32 a) |
573 | { |
574 | msg_set_word(m, w: 3, val: a); |
575 | } |
576 | |
577 | static inline u32 msg_origport(struct tipc_msg *m) |
578 | { |
579 | if (msg_user(m) == MSG_FRAGMENTER) |
580 | m = msg_inner_hdr(m); |
581 | return msg_word(m, pos: 4); |
582 | } |
583 | |
584 | static inline void msg_set_origport(struct tipc_msg *m, u32 p) |
585 | { |
586 | msg_set_word(m, w: 4, val: p); |
587 | } |
588 | |
589 | static inline u16 msg_named_seqno(struct tipc_msg *m) |
590 | { |
591 | return msg_bits(m, w: 4, pos: 0, mask: 0xffff); |
592 | } |
593 | |
594 | static inline void msg_set_named_seqno(struct tipc_msg *m, u16 n) |
595 | { |
596 | msg_set_bits(m, w: 4, pos: 0, mask: 0xffff, val: n); |
597 | } |
598 | |
599 | static inline u32 msg_destport(struct tipc_msg *m) |
600 | { |
601 | return msg_word(m, pos: 5); |
602 | } |
603 | |
604 | static inline void msg_set_destport(struct tipc_msg *m, u32 p) |
605 | { |
606 | msg_set_word(m, w: 5, val: p); |
607 | } |
608 | |
609 | static inline u32 msg_mc_netid(struct tipc_msg *m) |
610 | { |
611 | return msg_word(m, pos: 5); |
612 | } |
613 | |
614 | static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p) |
615 | { |
616 | msg_set_word(m, w: 5, val: p); |
617 | } |
618 | |
619 | static inline int msg_short(struct tipc_msg *m) |
620 | { |
621 | return msg_hdr_sz(m) == SHORT_H_SIZE; |
622 | } |
623 | |
624 | static inline u32 msg_orignode(struct tipc_msg *m) |
625 | { |
626 | if (likely(msg_short(m))) |
627 | return msg_prevnode(m); |
628 | return msg_word(m, pos: 6); |
629 | } |
630 | |
631 | static inline void msg_set_orignode(struct tipc_msg *m, u32 a) |
632 | { |
633 | msg_set_word(m, w: 6, val: a); |
634 | } |
635 | |
636 | static inline u32 msg_destnode(struct tipc_msg *m) |
637 | { |
638 | return msg_word(m, pos: 7); |
639 | } |
640 | |
641 | static inline void msg_set_destnode(struct tipc_msg *m, u32 a) |
642 | { |
643 | msg_set_word(m, w: 7, val: a); |
644 | } |
645 | |
646 | static inline u32 msg_nametype(struct tipc_msg *m) |
647 | { |
648 | return msg_word(m, pos: 8); |
649 | } |
650 | |
651 | static inline void msg_set_nametype(struct tipc_msg *m, u32 n) |
652 | { |
653 | msg_set_word(m, w: 8, val: n); |
654 | } |
655 | |
656 | static inline u32 msg_nameinst(struct tipc_msg *m) |
657 | { |
658 | return msg_word(m, pos: 9); |
659 | } |
660 | |
661 | static inline u32 msg_namelower(struct tipc_msg *m) |
662 | { |
663 | return msg_nameinst(m); |
664 | } |
665 | |
666 | static inline void msg_set_namelower(struct tipc_msg *m, u32 n) |
667 | { |
668 | msg_set_word(m, w: 9, val: n); |
669 | } |
670 | |
671 | static inline void msg_set_nameinst(struct tipc_msg *m, u32 n) |
672 | { |
673 | msg_set_namelower(m, n); |
674 | } |
675 | |
676 | static inline u32 msg_nameupper(struct tipc_msg *m) |
677 | { |
678 | return msg_word(m, pos: 10); |
679 | } |
680 | |
681 | static inline void msg_set_nameupper(struct tipc_msg *m, u32 n) |
682 | { |
683 | msg_set_word(m, w: 10, val: n); |
684 | } |
685 | |
686 | /* |
687 | * Constants and routines used to read and write TIPC internal message headers |
688 | */ |
689 | |
690 | /* |
691 | * Connection management protocol message types |
692 | */ |
693 | #define CONN_PROBE 0 |
694 | #define CONN_PROBE_REPLY 1 |
695 | #define CONN_ACK 2 |
696 | |
697 | /* |
698 | * Name distributor message types |
699 | */ |
700 | #define PUBLICATION 0 |
701 | #define WITHDRAWAL 1 |
702 | |
703 | /* |
704 | * Segmentation message types |
705 | */ |
706 | #define FIRST_FRAGMENT 0 |
707 | #define FRAGMENT 1 |
708 | #define LAST_FRAGMENT 2 |
709 | |
710 | /* |
711 | * Link management protocol message types |
712 | */ |
713 | #define STATE_MSG 0 |
714 | #define RESET_MSG 1 |
715 | #define ACTIVATE_MSG 2 |
716 | |
717 | /* |
718 | * Changeover tunnel message types |
719 | */ |
720 | #define SYNCH_MSG 0 |
721 | #define FAILOVER_MSG 1 |
722 | |
723 | /* |
724 | * Config protocol message types |
725 | */ |
726 | #define DSC_REQ_MSG 0 |
727 | #define DSC_RESP_MSG 1 |
728 | #define DSC_TRIAL_MSG 2 |
729 | #define DSC_TRIAL_FAIL_MSG 3 |
730 | |
731 | /* |
732 | * Group protocol message types |
733 | */ |
734 | #define GRP_JOIN_MSG 0 |
735 | #define GRP_LEAVE_MSG 1 |
736 | #define GRP_ADV_MSG 2 |
737 | #define GRP_ACK_MSG 3 |
738 | #define GRP_RECLAIM_MSG 4 |
739 | #define GRP_REMIT_MSG 5 |
740 | |
741 | /* Crypto message types */ |
742 | #define KEY_DISTR_MSG 0 |
743 | |
744 | /* |
745 | * Word 1 |
746 | */ |
747 | static inline u32 msg_seq_gap(struct tipc_msg *m) |
748 | { |
749 | return msg_bits(m, w: 1, pos: 16, mask: 0x1fff); |
750 | } |
751 | |
752 | static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n) |
753 | { |
754 | msg_set_bits(m, w: 1, pos: 16, mask: 0x1fff, val: n); |
755 | } |
756 | |
757 | static inline u32 msg_node_sig(struct tipc_msg *m) |
758 | { |
759 | return msg_bits(m, w: 1, pos: 0, mask: 0xffff); |
760 | } |
761 | |
762 | static inline void msg_set_node_sig(struct tipc_msg *m, u32 n) |
763 | { |
764 | msg_set_bits(m, w: 1, pos: 0, mask: 0xffff, val: n); |
765 | } |
766 | |
767 | static inline u32 msg_node_capabilities(struct tipc_msg *m) |
768 | { |
769 | return msg_bits(m, w: 1, pos: 15, mask: 0x1fff); |
770 | } |
771 | |
772 | static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n) |
773 | { |
774 | msg_set_bits(m, w: 1, pos: 15, mask: 0x1fff, val: n); |
775 | } |
776 | |
777 | /* |
778 | * Word 2 |
779 | */ |
780 | static inline u32 msg_dest_domain(struct tipc_msg *m) |
781 | { |
782 | return msg_word(m, pos: 2); |
783 | } |
784 | |
785 | static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n) |
786 | { |
787 | msg_set_word(m, w: 2, val: n); |
788 | } |
789 | |
790 | static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n) |
791 | { |
792 | msg_set_bits(m, w: 2, pos: 16, mask: 0xffff, val: n); |
793 | } |
794 | |
795 | static inline u32 msg_bcgap_to(struct tipc_msg *m) |
796 | { |
797 | return msg_bits(m, w: 2, pos: 0, mask: 0xffff); |
798 | } |
799 | |
800 | static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n) |
801 | { |
802 | msg_set_bits(m, w: 2, pos: 0, mask: 0xffff, val: n); |
803 | } |
804 | |
805 | /* |
806 | * Word 4 |
807 | */ |
808 | static inline u32 msg_last_bcast(struct tipc_msg *m) |
809 | { |
810 | return msg_bits(m, w: 4, pos: 16, mask: 0xffff); |
811 | } |
812 | |
813 | static inline u32 msg_bc_snd_nxt(struct tipc_msg *m) |
814 | { |
815 | return msg_last_bcast(m) + 1; |
816 | } |
817 | |
818 | static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n) |
819 | { |
820 | msg_set_bits(m, w: 4, pos: 16, mask: 0xffff, val: n); |
821 | } |
822 | |
823 | static inline u32 msg_nof_fragms(struct tipc_msg *m) |
824 | { |
825 | return msg_bits(m, w: 4, pos: 0, mask: 0xffff); |
826 | } |
827 | |
828 | static inline void msg_set_nof_fragms(struct tipc_msg *m, u32 n) |
829 | { |
830 | msg_set_bits(m, w: 4, pos: 0, mask: 0xffff, val: n); |
831 | } |
832 | |
833 | static inline u32 msg_fragm_no(struct tipc_msg *m) |
834 | { |
835 | return msg_bits(m, w: 4, pos: 16, mask: 0xffff); |
836 | } |
837 | |
838 | static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n) |
839 | { |
840 | msg_set_bits(m, w: 4, pos: 16, mask: 0xffff, val: n); |
841 | } |
842 | |
843 | static inline u16 msg_next_sent(struct tipc_msg *m) |
844 | { |
845 | return msg_bits(m, w: 4, pos: 0, mask: 0xffff); |
846 | } |
847 | |
848 | static inline void msg_set_next_sent(struct tipc_msg *m, u16 n) |
849 | { |
850 | msg_set_bits(m, w: 4, pos: 0, mask: 0xffff, val: n); |
851 | } |
852 | |
853 | static inline u32 msg_bc_netid(struct tipc_msg *m) |
854 | { |
855 | return msg_word(m, pos: 4); |
856 | } |
857 | |
858 | static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id) |
859 | { |
860 | msg_set_word(m, w: 4, val: id); |
861 | } |
862 | |
863 | static inline u32 msg_link_selector(struct tipc_msg *m) |
864 | { |
865 | if (msg_user(m) == MSG_FRAGMENTER) |
866 | m = (void *)msg_data(m); |
867 | return msg_bits(m, w: 4, pos: 0, mask: 1); |
868 | } |
869 | |
870 | /* |
871 | * Word 5 |
872 | */ |
873 | static inline u16 msg_session(struct tipc_msg *m) |
874 | { |
875 | return msg_bits(m, w: 5, pos: 16, mask: 0xffff); |
876 | } |
877 | |
878 | static inline void msg_set_session(struct tipc_msg *m, u16 n) |
879 | { |
880 | msg_set_bits(m, w: 5, pos: 16, mask: 0xffff, val: n); |
881 | } |
882 | |
883 | static inline u32 msg_probe(struct tipc_msg *m) |
884 | { |
885 | return msg_bits(m, w: 5, pos: 0, mask: 1); |
886 | } |
887 | |
888 | static inline void msg_set_probe(struct tipc_msg *m, u32 val) |
889 | { |
890 | msg_set_bits(m, w: 5, pos: 0, mask: 1, val); |
891 | } |
892 | |
893 | static inline char msg_net_plane(struct tipc_msg *m) |
894 | { |
895 | return msg_bits(m, w: 5, pos: 1, mask: 7) + 'A'; |
896 | } |
897 | |
898 | static inline void msg_set_net_plane(struct tipc_msg *m, char n) |
899 | { |
900 | msg_set_bits(m, w: 5, pos: 1, mask: 7, val: (n - 'A')); |
901 | } |
902 | |
903 | static inline u32 msg_linkprio(struct tipc_msg *m) |
904 | { |
905 | return msg_bits(m, w: 5, pos: 4, mask: 0x1f); |
906 | } |
907 | |
908 | static inline void msg_set_linkprio(struct tipc_msg *m, u32 n) |
909 | { |
910 | msg_set_bits(m, w: 5, pos: 4, mask: 0x1f, val: n); |
911 | } |
912 | |
913 | static inline u32 msg_bearer_id(struct tipc_msg *m) |
914 | { |
915 | return msg_bits(m, w: 5, pos: 9, mask: 0x7); |
916 | } |
917 | |
918 | static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n) |
919 | { |
920 | msg_set_bits(m, w: 5, pos: 9, mask: 0x7, val: n); |
921 | } |
922 | |
923 | static inline u32 msg_redundant_link(struct tipc_msg *m) |
924 | { |
925 | return msg_bits(m, w: 5, pos: 12, mask: 0x1); |
926 | } |
927 | |
928 | static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r) |
929 | { |
930 | msg_set_bits(m, w: 5, pos: 12, mask: 0x1, val: r); |
931 | } |
932 | |
933 | static inline u32 msg_peer_stopping(struct tipc_msg *m) |
934 | { |
935 | return msg_bits(m, w: 5, pos: 13, mask: 0x1); |
936 | } |
937 | |
938 | static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s) |
939 | { |
940 | msg_set_bits(m, w: 5, pos: 13, mask: 0x1, val: s); |
941 | } |
942 | |
943 | static inline bool msg_bc_ack_invalid(struct tipc_msg *m) |
944 | { |
945 | switch (msg_user(m)) { |
946 | case BCAST_PROTOCOL: |
947 | case NAME_DISTRIBUTOR: |
948 | case LINK_PROTOCOL: |
949 | return msg_bits(m, w: 5, pos: 14, mask: 0x1); |
950 | default: |
951 | return false; |
952 | } |
953 | } |
954 | |
955 | static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid) |
956 | { |
957 | msg_set_bits(m, w: 5, pos: 14, mask: 0x1, val: invalid); |
958 | } |
959 | |
960 | static inline char *msg_media_addr(struct tipc_msg *m) |
961 | { |
962 | return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET]; |
963 | } |
964 | |
965 | static inline u32 msg_bc_gap(struct tipc_msg *m) |
966 | { |
967 | return msg_bits(m, w: 8, pos: 0, mask: 0x3ff); |
968 | } |
969 | |
970 | static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n) |
971 | { |
972 | msg_set_bits(m, w: 8, pos: 0, mask: 0x3ff, val: n); |
973 | } |
974 | |
975 | /* |
976 | * Word 9 |
977 | */ |
978 | static inline u16 msg_msgcnt(struct tipc_msg *m) |
979 | { |
980 | return msg_bits(m, w: 9, pos: 16, mask: 0xffff); |
981 | } |
982 | |
983 | static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n) |
984 | { |
985 | msg_set_bits(m, w: 9, pos: 16, mask: 0xffff, val: n); |
986 | } |
987 | |
988 | static inline u16 msg_syncpt(struct tipc_msg *m) |
989 | { |
990 | return msg_bits(m, w: 9, pos: 16, mask: 0xffff); |
991 | } |
992 | |
993 | static inline void msg_set_syncpt(struct tipc_msg *m, u16 n) |
994 | { |
995 | msg_set_bits(m, w: 9, pos: 16, mask: 0xffff, val: n); |
996 | } |
997 | |
998 | static inline u32 msg_conn_ack(struct tipc_msg *m) |
999 | { |
1000 | return msg_bits(m, w: 9, pos: 16, mask: 0xffff); |
1001 | } |
1002 | |
1003 | static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n) |
1004 | { |
1005 | msg_set_bits(m, w: 9, pos: 16, mask: 0xffff, val: n); |
1006 | } |
1007 | |
1008 | static inline u16 msg_adv_win(struct tipc_msg *m) |
1009 | { |
1010 | return msg_bits(m, w: 9, pos: 0, mask: 0xffff); |
1011 | } |
1012 | |
1013 | static inline void msg_set_adv_win(struct tipc_msg *m, u16 n) |
1014 | { |
1015 | msg_set_bits(m, w: 9, pos: 0, mask: 0xffff, val: n); |
1016 | } |
1017 | |
1018 | static inline u32 msg_max_pkt(struct tipc_msg *m) |
1019 | { |
1020 | return msg_bits(m, w: 9, pos: 16, mask: 0xffff) * 4; |
1021 | } |
1022 | |
1023 | static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n) |
1024 | { |
1025 | msg_set_bits(m, w: 9, pos: 16, mask: 0xffff, val: (n / 4)); |
1026 | } |
1027 | |
1028 | static inline u32 msg_link_tolerance(struct tipc_msg *m) |
1029 | { |
1030 | return msg_bits(m, w: 9, pos: 0, mask: 0xffff); |
1031 | } |
1032 | |
1033 | static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n) |
1034 | { |
1035 | msg_set_bits(m, w: 9, pos: 0, mask: 0xffff, val: n); |
1036 | } |
1037 | |
1038 | static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m) |
1039 | { |
1040 | return msg_bits(m, w: 9, pos: 16, mask: 0xffff); |
1041 | } |
1042 | |
1043 | static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n) |
1044 | { |
1045 | msg_set_bits(m, w: 9, pos: 16, mask: 0xffff, val: n); |
1046 | } |
1047 | |
1048 | static inline u16 msg_grp_bc_acked(struct tipc_msg *m) |
1049 | { |
1050 | return msg_bits(m, w: 9, pos: 16, mask: 0xffff); |
1051 | } |
1052 | |
1053 | static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n) |
1054 | { |
1055 | msg_set_bits(m, w: 9, pos: 16, mask: 0xffff, val: n); |
1056 | } |
1057 | |
1058 | static inline u16 msg_grp_remitted(struct tipc_msg *m) |
1059 | { |
1060 | return msg_bits(m, w: 9, pos: 16, mask: 0xffff); |
1061 | } |
1062 | |
1063 | static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n) |
1064 | { |
1065 | msg_set_bits(m, w: 9, pos: 16, mask: 0xffff, val: n); |
1066 | } |
1067 | |
1068 | /* Word 10 |
1069 | */ |
1070 | static inline u16 msg_grp_evt(struct tipc_msg *m) |
1071 | { |
1072 | return msg_bits(m, w: 10, pos: 0, mask: 0x3); |
1073 | } |
1074 | |
1075 | static inline void msg_set_grp_evt(struct tipc_msg *m, int n) |
1076 | { |
1077 | msg_set_bits(m, w: 10, pos: 0, mask: 0x3, val: n); |
1078 | } |
1079 | |
1080 | static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m) |
1081 | { |
1082 | return msg_bits(m, w: 10, pos: 0, mask: 0x1); |
1083 | } |
1084 | |
1085 | static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n) |
1086 | { |
1087 | msg_set_bits(m, w: 10, pos: 0, mask: 0x1, val: n); |
1088 | } |
1089 | |
1090 | static inline u16 msg_grp_bc_seqno(struct tipc_msg *m) |
1091 | { |
1092 | return msg_bits(m, w: 10, pos: 16, mask: 0xffff); |
1093 | } |
1094 | |
1095 | static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n) |
1096 | { |
1097 | msg_set_bits(m, w: 10, pos: 16, mask: 0xffff, val: n); |
1098 | } |
1099 | |
1100 | static inline bool msg_peer_link_is_up(struct tipc_msg *m) |
1101 | { |
1102 | if (likely(msg_user(m) != LINK_PROTOCOL)) |
1103 | return true; |
1104 | if (msg_type(m) == STATE_MSG) |
1105 | return true; |
1106 | return false; |
1107 | } |
1108 | |
1109 | static inline bool msg_peer_node_is_up(struct tipc_msg *m) |
1110 | { |
1111 | if (msg_peer_link_is_up(m)) |
1112 | return true; |
1113 | return msg_redundant_link(m); |
1114 | } |
1115 | |
1116 | static inline bool msg_is_reset(struct tipc_msg *hdr) |
1117 | { |
1118 | return (msg_user(m: hdr) == LINK_PROTOCOL) && (msg_type(m: hdr) == RESET_MSG); |
1119 | } |
1120 | |
1121 | /* Word 13 |
1122 | */ |
1123 | static inline void msg_set_peer_net_hash(struct tipc_msg *m, u32 n) |
1124 | { |
1125 | msg_set_word(m, w: 13, val: n); |
1126 | } |
1127 | |
1128 | static inline u32 msg_peer_net_hash(struct tipc_msg *m) |
1129 | { |
1130 | return msg_word(m, pos: 13); |
1131 | } |
1132 | |
1133 | /* Word 14 |
1134 | */ |
1135 | static inline u32 msg_sugg_node_addr(struct tipc_msg *m) |
1136 | { |
1137 | return msg_word(m, pos: 14); |
1138 | } |
1139 | |
1140 | static inline void msg_set_sugg_node_addr(struct tipc_msg *m, u32 n) |
1141 | { |
1142 | msg_set_word(m, w: 14, val: n); |
1143 | } |
1144 | |
1145 | static inline void msg_set_node_id(struct tipc_msg *hdr, u8 *id) |
1146 | { |
1147 | memcpy(msg_data(hdr), id, 16); |
1148 | } |
1149 | |
1150 | static inline u8 *msg_node_id(struct tipc_msg *hdr) |
1151 | { |
1152 | return (u8 *)msg_data(m: hdr); |
1153 | } |
1154 | |
1155 | struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp); |
1156 | bool tipc_msg_validate(struct sk_buff **_skb); |
1157 | bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err); |
1158 | void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb, |
1159 | struct sk_buff_head *xmitq); |
1160 | void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type, |
1161 | u32 hsize, u32 destnode); |
1162 | struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz, |
1163 | uint data_sz, u32 dnode, u32 onode, |
1164 | u32 dport, u32 oport, int errcode); |
1165 | int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf); |
1166 | bool tipc_msg_try_bundle(struct sk_buff *tskb, struct sk_buff **skb, u32 mss, |
1167 | u32 dnode, bool *new_bundle); |
1168 | bool (struct sk_buff *skb, struct sk_buff **iskb, int *pos); |
1169 | int tipc_msg_fragment(struct sk_buff *skb, const struct tipc_msg *hdr, |
1170 | int pktmax, struct sk_buff_head *frags); |
1171 | int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, |
1172 | int offset, int dsz, int mtu, struct sk_buff_head *list); |
1173 | int tipc_msg_append(struct tipc_msg *hdr, struct msghdr *m, int dlen, |
1174 | int mss, struct sk_buff_head *txq); |
1175 | bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err); |
1176 | bool tipc_msg_assemble(struct sk_buff_head *list); |
1177 | bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq); |
1178 | bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg, |
1179 | struct sk_buff_head *cpy); |
1180 | bool __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno, |
1181 | struct sk_buff *skb); |
1182 | bool tipc_msg_skb_clone(struct sk_buff_head *msg, struct sk_buff_head *cpy); |
1183 | |
1184 | static inline u16 buf_seqno(struct sk_buff *skb) |
1185 | { |
1186 | return msg_seqno(m: buf_msg(skb)); |
1187 | } |
1188 | |
1189 | static inline int buf_roundup_len(struct sk_buff *skb) |
1190 | { |
1191 | return (skb->len / 1024 + 1) * 1024; |
1192 | } |
1193 | |
1194 | /* tipc_skb_peek(): peek and reserve first buffer in list |
1195 | * @list: list to be peeked in |
1196 | * Returns pointer to first buffer in list, if any |
1197 | */ |
1198 | static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list, |
1199 | spinlock_t *lock) |
1200 | { |
1201 | struct sk_buff *skb; |
1202 | |
1203 | spin_lock_bh(lock); |
1204 | skb = skb_peek(list_: list); |
1205 | if (skb) |
1206 | skb_get(skb); |
1207 | spin_unlock_bh(lock); |
1208 | return skb; |
1209 | } |
1210 | |
1211 | /* tipc_skb_peek_port(): find a destination port, ignoring all destinations |
1212 | * up to and including 'filter'. |
1213 | * Note: ignoring previously tried destinations minimizes the risk of |
1214 | * contention on the socket lock |
1215 | * @list: list to be peeked in |
1216 | * @filter: last destination to be ignored from search |
1217 | * Returns a destination port number, of applicable. |
1218 | */ |
1219 | static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter) |
1220 | { |
1221 | struct sk_buff *skb; |
1222 | u32 dport = 0; |
1223 | bool ignore = true; |
1224 | |
1225 | spin_lock_bh(lock: &list->lock); |
1226 | skb_queue_walk(list, skb) { |
1227 | dport = msg_destport(m: buf_msg(skb)); |
1228 | if (!filter || skb_queue_is_last(list, skb)) |
1229 | break; |
1230 | if (dport == filter) |
1231 | ignore = false; |
1232 | else if (!ignore) |
1233 | break; |
1234 | } |
1235 | spin_unlock_bh(lock: &list->lock); |
1236 | return dport; |
1237 | } |
1238 | |
1239 | /* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list |
1240 | * @list: list to be unlinked from |
1241 | * @dport: selection criteria for buffer to unlink |
1242 | */ |
1243 | static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list, |
1244 | u32 dport) |
1245 | { |
1246 | struct sk_buff *_skb, *tmp, *skb = NULL; |
1247 | |
1248 | spin_lock_bh(lock: &list->lock); |
1249 | skb_queue_walk_safe(list, _skb, tmp) { |
1250 | if (msg_destport(m: buf_msg(skb: _skb)) == dport) { |
1251 | __skb_unlink(skb: _skb, list); |
1252 | skb = _skb; |
1253 | break; |
1254 | } |
1255 | } |
1256 | spin_unlock_bh(lock: &list->lock); |
1257 | return skb; |
1258 | } |
1259 | |
1260 | /* tipc_skb_queue_splice_tail - append an skb list to lock protected list |
1261 | * @list: the new list to append. Not lock protected |
1262 | * @head: target list. Lock protected. |
1263 | */ |
1264 | static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list, |
1265 | struct sk_buff_head *head) |
1266 | { |
1267 | spin_lock_bh(lock: &head->lock); |
1268 | skb_queue_splice_tail(list, head); |
1269 | spin_unlock_bh(lock: &head->lock); |
1270 | } |
1271 | |
1272 | /* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists |
1273 | * @list: the new list to add. Lock protected. Will be reinitialized |
1274 | * @head: target list. Lock protected. |
1275 | */ |
1276 | static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list, |
1277 | struct sk_buff_head *head) |
1278 | { |
1279 | struct sk_buff_head tmp; |
1280 | |
1281 | __skb_queue_head_init(list: &tmp); |
1282 | |
1283 | spin_lock_bh(lock: &list->lock); |
1284 | skb_queue_splice_tail_init(list, head: &tmp); |
1285 | spin_unlock_bh(lock: &list->lock); |
1286 | tipc_skb_queue_splice_tail(list: &tmp, head); |
1287 | } |
1288 | |
1289 | /* __tipc_skb_dequeue() - dequeue the head skb according to expected seqno |
1290 | * @list: list to be dequeued from |
1291 | * @seqno: seqno of the expected msg |
1292 | * |
1293 | * returns skb dequeued from the list if its seqno is less than or equal to |
1294 | * the expected one, otherwise the skb is still hold |
1295 | * |
1296 | * Note: must be used with appropriate locks held only |
1297 | */ |
1298 | static inline struct sk_buff *__tipc_skb_dequeue(struct sk_buff_head *list, |
1299 | u16 seqno) |
1300 | { |
1301 | struct sk_buff *skb = skb_peek(list_: list); |
1302 | |
1303 | if (skb && less_eq(left: buf_seqno(skb), right: seqno)) { |
1304 | __skb_unlink(skb, list); |
1305 | return skb; |
1306 | } |
1307 | return NULL; |
1308 | } |
1309 | |
1310 | #endif |
1311 | |