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Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/msg.h: Include file for TIPC message header routines
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Jon Maloy75da2162017-10-13 11:04:23 +02004 * Copyright (c) 2000-2007, 2014-2017 Ericsson AB
Allan Stephens741de3e2011-01-25 13:33:31 -05005 * Copyright (c) 2005-2008, 2010-2011, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 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.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * 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
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37#ifndef _TIPC_MSG_H
38#define _TIPC_MSG_H
39
Ying Xue1da46562015-01-09 15:27:07 +080040#include <linux/tipc.h>
Jon Paul Maloyd9992972015-07-16 16:54:31 -040041#include "core.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010042
Allan Stephenscc4c4352011-04-08 10:50:52 -040043/*
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 */
Per Lidenb97bf3f2006-01-02 19:04:38 +010048#define TIPC_VERSION 2
Jon Paul Maloyc637c102015-02-05 08:36:41 -050049struct plist;
Allan Stephens06d82c92008-03-06 15:06:55 -080050
Allan Stephensd265fef2010-11-30 12:00:53 +000051/*
Allan Stephenscc4c4352011-04-08 10:50:52 -040052 * 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 */
Jon Paul Maloye3eea1e2015-03-13 16:08:11 -040058#define TIPC_SYSTEM_IMPORTANCE 4
59
Allan Stephenscc4c4352011-04-08 10:50:52 -040060
61/*
62 * Payload message types
Allan Stephensd265fef2010-11-30 12:00:53 +000063 */
Jon Maloy75da2162017-10-13 11:04:23 +020064#define TIPC_CONN_MSG 0
65#define TIPC_MCAST_MSG 1
66#define TIPC_NAMED_MSG 2
67#define TIPC_DIRECT_MSG 3
Jon Maloyae236fb2017-10-13 11:04:25 +020068#define TIPC_GRP_MEMBER_EVT 4
69#define TIPC_GRP_BCAST_MSG 5
Jon Maloy5b8dddb2017-10-13 11:04:29 +020070#define TIPC_GRP_MCAST_MSG 6
71#define TIPC_GRP_UCAST_MSG 7
Allan Stephensd265fef2010-11-30 12:00:53 +000072
Allan Stephenscc4c4352011-04-08 10:50:52 -040073/*
Jon Paul Maloye3eea1e2015-03-13 16:08:11 -040074 * Internal message users
75 */
76#define BCAST_PROTOCOL 5
77#define MSG_BUNDLER 6
78#define LINK_PROTOCOL 7
79#define CONN_MANAGER 8
Jon Maloy75da2162017-10-13 11:04:23 +020080#define GROUP_PROTOCOL 9
Jon Paul Maloydff29b12015-04-02 09:33:01 -040081#define TUNNEL_PROTOCOL 10
Jon Paul Maloye3eea1e2015-03-13 16:08:11 -040082#define NAME_DISTRIBUTOR 11
83#define MSG_FRAGMENTER 12
84#define LINK_CONFIG 13
85#define SOCK_WAKEUP 14 /* pseudo user */
Jon Maloy14c04492017-10-13 11:04:17 +020086#define TOP_SRV 15 /* pseudo user */
Jon Paul Maloye3eea1e2015-03-13 16:08:11 -040087
88/*
Allan Stephenscc4c4352011-04-08 10:50:52 -040089 * Message header sizes
90 */
Allan Stephens741d9eb2011-05-31 15:03:18 -040091#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 */
Jon Maloy75da2162017-10-13 11:04:23 +020095#define GROUP_H_SIZE 44 /* Group payload message */
Allan Stephens06d82c92008-03-06 15:06:55 -080096#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
Per Lidenb97bf3f2006-01-02 19:04:38 +0100100#define MAX_MSG_SIZE (MAX_H_SIZE + TIPC_MAX_USER_MSG_SIZE)
Jon Maloy4c94cc22017-11-30 16:47:25 +0100101#define FB_MTU 3744
Erik Hugne91e2eb52015-02-27 08:56:57 +0100102#define TIPC_MEDIA_INFO_OFFSET 5
Allan Stephens3d749a62011-10-07 15:19:11 -0400103
Ying Xue859fc7c2015-01-09 15:27:01 +0800104struct tipc_skb_cb {
Parthasarathy Bhuvaraganba8aebe2016-11-01 14:02:37 +0100105 u32 bytes_read;
Jon Maloy31c82a22017-10-13 11:04:24 +0200106 u32 orig_member;
Ying Xue859fc7c2015-01-09 15:27:01 +0800107 struct sk_buff *tail;
Jon Paul Maloycf2157f2015-03-13 16:08:06 -0400108 bool validated;
Ying Xue859fc7c2015-01-09 15:27:01 +0800109 u16 chain_imp;
Jon Paul Maloyc1ab3f1d2015-10-22 08:51:38 -0400110 u16 ackers;
Ying Xue859fc7c2015-01-09 15:27:01 +0800111};
112
113#define TIPC_SKB_CB(__skb) ((struct tipc_skb_cb *)&((__skb)->cb[0]))
114
Allan Stephensd265fef2010-11-30 12:00:53 +0000115struct tipc_msg {
116 __be32 hdr[15];
117};
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900118
Ying Xue859fc7c2015-01-09 15:27:01 +0800119static inline struct tipc_msg *buf_msg(struct sk_buff *skb)
120{
121 return (struct tipc_msg *)skb->data;
122}
123
Allan Stephensd265fef2010-11-30 12:00:53 +0000124static inline u32 msg_word(struct tipc_msg *m, u32 pos)
125{
126 return ntohl(m->hdr[pos]);
127}
Per Lidenb97bf3f2006-01-02 19:04:38 +0100128
129static inline void msg_set_word(struct tipc_msg *m, u32 w, u32 val)
130{
131 m->hdr[w] = htonl(val);
132}
133
Allan Stephensd265fef2010-11-30 12:00:53 +0000134static inline u32 msg_bits(struct tipc_msg *m, u32 w, u32 pos, u32 mask)
135{
136 return (msg_word(m, w) >> pos) & mask;
137}
138
Per Lidenb97bf3f2006-01-02 19:04:38 +0100139static inline void msg_set_bits(struct tipc_msg *m, u32 w,
140 u32 pos, u32 mask, u32 val)
141{
Allan Stephens1f9eda72007-04-24 14:51:55 -0700142 val = (val & mask) << pos;
Al Virobecf3da2008-04-26 22:42:14 -0700143 mask = mask << pos;
144 m->hdr[w] &= ~htonl(mask);
145 m->hdr[w] |= htonl(val);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100146}
147
Allan Stephens40aecb12008-06-04 17:54:48 -0700148static inline void msg_swap_words(struct tipc_msg *msg, u32 a, u32 b)
149{
150 u32 temp = msg->hdr[a];
151
152 msg->hdr[a] = msg->hdr[b];
153 msg->hdr[b] = temp;
154}
155
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900156/*
Per Lidenb97bf3f2006-01-02 19:04:38 +0100157 * Word 0
158 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100159static inline u32 msg_version(struct tipc_msg *m)
160{
161 return msg_bits(m, 0, 29, 7);
162}
163
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900164static inline void msg_set_version(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100165{
Allan Stephens37695422008-03-06 15:07:42 -0800166 msg_set_bits(m, 0, 29, 7, TIPC_VERSION);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100167}
168
169static inline u32 msg_user(struct tipc_msg *m)
170{
171 return msg_bits(m, 0, 25, 0xf);
172}
173
174static inline u32 msg_isdata(struct tipc_msg *m)
175{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000176 return msg_user(m) <= TIPC_CRITICAL_IMPORTANCE;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100177}
178
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900179static inline void msg_set_user(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100180{
181 msg_set_bits(m, 0, 25, 0xf, n);
182}
183
Allan Stephensd265fef2010-11-30 12:00:53 +0000184static inline u32 msg_hdr_sz(struct tipc_msg *m)
185{
186 return msg_bits(m, 0, 21, 0xf) << 2;
187}
188
Allan Stephens0e659672010-12-31 18:59:32 +0000189static inline void msg_set_hdr_sz(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100190{
191 msg_set_bits(m, 0, 21, 0xf, n>>2);
192}
193
Allan Stephensd265fef2010-11-30 12:00:53 +0000194static inline u32 msg_size(struct tipc_msg *m)
195{
196 return msg_bits(m, 0, 0, 0x1ffff);
197}
198
Jon Maloy5b8dddb2017-10-13 11:04:29 +0200199static inline u32 msg_blocks(struct tipc_msg *m)
200{
201 return (msg_size(m) / 1024) + 1;
202}
203
Allan Stephensd265fef2010-11-30 12:00:53 +0000204static inline u32 msg_data_sz(struct tipc_msg *m)
205{
206 return msg_size(m) - msg_hdr_sz(m);
207}
208
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900209static inline int msg_non_seq(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100210{
211 return msg_bits(m, 0, 20, 1);
212}
213
Allan Stephens40aecb12008-06-04 17:54:48 -0700214static inline void msg_set_non_seq(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100215{
Allan Stephens40aecb12008-06-04 17:54:48 -0700216 msg_set_bits(m, 0, 20, 1, n);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100217}
218
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900219static inline int msg_dest_droppable(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100220{
221 return msg_bits(m, 0, 19, 1);
222}
223
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900224static inline void msg_set_dest_droppable(struct tipc_msg *m, u32 d)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100225{
226 msg_set_bits(m, 0, 19, 1, d);
227}
228
Jon Maloy8d6e79d2017-11-08 09:59:26 +0100229static inline int msg_is_keepalive(struct tipc_msg *m)
230{
231 return msg_bits(m, 0, 19, 1);
232}
233
234static inline void msg_set_is_keepalive(struct tipc_msg *m, u32 d)
235{
236 msg_set_bits(m, 0, 19, 1, d);
237}
238
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900239static inline int msg_src_droppable(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100240{
241 return msg_bits(m, 0, 18, 1);
242}
243
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900244static inline void msg_set_src_droppable(struct tipc_msg *m, u32 d)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100245{
246 msg_set_bits(m, 0, 18, 1, d);
247}
248
249static inline void msg_set_size(struct tipc_msg *m, u32 sz)
250{
251 m->hdr[0] = htonl((msg_word(m, 0) & ~0x1ffff) | sz);
252}
253
Jon Paul Maloy3127a022015-03-25 12:07:25 -0400254static inline unchar *msg_data(struct tipc_msg *m)
255{
256 return ((unchar *)m) + msg_hdr_sz(m);
257}
258
259static inline struct tipc_msg *msg_get_wrapped(struct tipc_msg *m)
260{
261 return (struct tipc_msg *)msg_data(m);
262}
Per Lidenb97bf3f2006-01-02 19:04:38 +0100263
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900264/*
Per Lidenb97bf3f2006-01-02 19:04:38 +0100265 * Word 1
266 */
Allan Stephensd265fef2010-11-30 12:00:53 +0000267static inline u32 msg_type(struct tipc_msg *m)
268{
269 return msg_bits(m, 1, 29, 0x7);
270}
271
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900272static inline void msg_set_type(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100273{
274 msg_set_bits(m, 1, 29, 0x7, n);
275}
276
Jon Maloy75da2162017-10-13 11:04:23 +0200277static inline int msg_in_group(struct tipc_msg *m)
278{
Jon Maloyae236fb2017-10-13 11:04:25 +0200279 int mtyp = msg_type(m);
280
Jon Maloy27bd9ec2017-10-13 11:04:27 +0200281 return mtyp >= TIPC_GRP_MEMBER_EVT && mtyp <= TIPC_GRP_UCAST_MSG;
Jon Maloyae236fb2017-10-13 11:04:25 +0200282}
283
284static inline bool msg_is_grp_evt(struct tipc_msg *m)
285{
286 return msg_type(m) == TIPC_GRP_MEMBER_EVT;
Jon Maloy75da2162017-10-13 11:04:23 +0200287}
288
Allan Stephensd265fef2010-11-30 12:00:53 +0000289static inline u32 msg_named(struct tipc_msg *m)
290{
291 return msg_type(m) == TIPC_NAMED_MSG;
292}
293
294static inline u32 msg_mcast(struct tipc_msg *m)
295{
Jon Maloy75da2162017-10-13 11:04:23 +0200296 int mtyp = msg_type(m);
297
Jon Maloy5b8dddb2017-10-13 11:04:29 +0200298 return ((mtyp == TIPC_MCAST_MSG) || (mtyp == TIPC_GRP_BCAST_MSG) ||
299 (mtyp == TIPC_GRP_MCAST_MSG));
Allan Stephensd265fef2010-11-30 12:00:53 +0000300}
301
302static inline u32 msg_connected(struct tipc_msg *m)
303{
304 return msg_type(m) == TIPC_CONN_MSG;
305}
306
307static inline u32 msg_errcode(struct tipc_msg *m)
308{
309 return msg_bits(m, 1, 25, 0xf);
310}
311
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900312static inline void msg_set_errcode(struct tipc_msg *m, u32 err)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100313{
314 msg_set_bits(m, 1, 25, 0xf, err);
315}
316
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900317static inline u32 msg_reroute_cnt(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100318{
319 return msg_bits(m, 1, 21, 0xf);
320}
321
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900322static inline void msg_incr_reroute_cnt(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100323{
324 msg_set_bits(m, 1, 21, 0xf, msg_reroute_cnt(m) + 1);
325}
326
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900327static inline void msg_reset_reroute_cnt(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100328{
329 msg_set_bits(m, 1, 21, 0xf, 0);
330}
331
332static inline u32 msg_lookup_scope(struct tipc_msg *m)
333{
334 return msg_bits(m, 1, 19, 0x3);
335}
336
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900337static inline void msg_set_lookup_scope(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100338{
339 msg_set_bits(m, 1, 19, 0x3, n);
340}
341
Jon Paul Maloye4bf4f72015-05-14 10:46:14 -0400342static inline u16 msg_bcast_ack(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100343{
344 return msg_bits(m, 1, 0, 0xffff);
345}
346
Jon Paul Maloye4bf4f72015-05-14 10:46:14 -0400347static inline void msg_set_bcast_ack(struct tipc_msg *m, u16 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100348{
349 msg_set_bits(m, 1, 0, 0xffff, n);
350}
351
352
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900353/*
Per Lidenb97bf3f2006-01-02 19:04:38 +0100354 * Word 2
355 */
Jon Paul Maloye4bf4f72015-05-14 10:46:14 -0400356static inline u16 msg_ack(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100357{
358 return msg_bits(m, 2, 16, 0xffff);
359}
360
Jon Paul Maloye4bf4f72015-05-14 10:46:14 -0400361static inline void msg_set_ack(struct tipc_msg *m, u16 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100362{
363 msg_set_bits(m, 2, 16, 0xffff, n);
364}
365
Jon Paul Maloye4bf4f72015-05-14 10:46:14 -0400366static inline u16 msg_seqno(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100367{
368 return msg_bits(m, 2, 0, 0xffff);
369}
370
Jon Paul Maloye4bf4f72015-05-14 10:46:14 -0400371static inline void msg_set_seqno(struct tipc_msg *m, u16 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100372{
373 msg_set_bits(m, 2, 0, 0xffff, n);
374}
375
Allan Stephens40aecb12008-06-04 17:54:48 -0700376/*
Per Lidenb97bf3f2006-01-02 19:04:38 +0100377 * Words 3-10
378 */
Jon Paul Maloye3eea1e2015-03-13 16:08:11 -0400379static inline u32 msg_importance(struct tipc_msg *m)
380{
Jon Paul Maloyf21e8972015-05-14 10:46:17 -0400381 int usr = msg_user(m);
382
383 if (likely((usr <= TIPC_CRITICAL_IMPORTANCE) && !msg_errcode(m)))
384 return usr;
385 if ((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER))
Jon Paul Maloydde4b5a2015-10-14 09:23:18 -0400386 return msg_bits(m, 9, 0, 0x7);
Jon Paul Maloye3eea1e2015-03-13 16:08:11 -0400387 return TIPC_SYSTEM_IMPORTANCE;
388}
389
390static inline void msg_set_importance(struct tipc_msg *m, u32 i)
391{
Jon Paul Maloyf21e8972015-05-14 10:46:17 -0400392 int usr = msg_user(m);
393
394 if (likely((usr == MSG_FRAGMENTER) || (usr == MSG_BUNDLER)))
Jon Paul Maloydde4b5a2015-10-14 09:23:18 -0400395 msg_set_bits(m, 9, 0, 0x7, i);
Jon Paul Maloyf21e8972015-05-14 10:46:17 -0400396 else if (i < TIPC_SYSTEM_IMPORTANCE)
Jon Paul Maloye3eea1e2015-03-13 16:08:11 -0400397 msg_set_user(m, i);
398 else
399 pr_warn("Trying to set illegal importance in message\n");
400}
401
Allan Stephensd265fef2010-11-30 12:00:53 +0000402static inline u32 msg_prevnode(struct tipc_msg *m)
403{
404 return msg_word(m, 3);
405}
406
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900407static inline void msg_set_prevnode(struct tipc_msg *m, u32 a)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100408{
409 msg_set_word(m, 3, a);
410}
411
Allan Stephensd265fef2010-11-30 12:00:53 +0000412static inline u32 msg_origport(struct tipc_msg *m)
413{
Jon Paul Maloy3127a022015-03-25 12:07:25 -0400414 if (msg_user(m) == MSG_FRAGMENTER)
415 m = msg_get_wrapped(m);
Allan Stephensd265fef2010-11-30 12:00:53 +0000416 return msg_word(m, 4);
417}
418
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900419static inline void msg_set_origport(struct tipc_msg *m, u32 p)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100420{
421 msg_set_word(m, 4, p);
422}
423
Allan Stephensd265fef2010-11-30 12:00:53 +0000424static inline u32 msg_destport(struct tipc_msg *m)
425{
426 return msg_word(m, 5);
427}
428
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900429static inline void msg_set_destport(struct tipc_msg *m, u32 p)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100430{
431 msg_set_word(m, 5, p);
432}
433
Allan Stephensd265fef2010-11-30 12:00:53 +0000434static inline u32 msg_mc_netid(struct tipc_msg *m)
435{
436 return msg_word(m, 5);
437}
438
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900439static inline void msg_set_mc_netid(struct tipc_msg *m, u32 p)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100440{
441 msg_set_word(m, 5, p);
442}
443
Allan Stephensd265fef2010-11-30 12:00:53 +0000444static inline int msg_short(struct tipc_msg *m)
445{
Allan Stephens741d9eb2011-05-31 15:03:18 -0400446 return msg_hdr_sz(m) == SHORT_H_SIZE;
Allan Stephensd265fef2010-11-30 12:00:53 +0000447}
448
449static inline u32 msg_orignode(struct tipc_msg *m)
450{
451 if (likely(msg_short(m)))
452 return msg_prevnode(m);
453 return msg_word(m, 6);
454}
455
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900456static inline void msg_set_orignode(struct tipc_msg *m, u32 a)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100457{
458 msg_set_word(m, 6, a);
459}
460
Allan Stephensd265fef2010-11-30 12:00:53 +0000461static inline u32 msg_destnode(struct tipc_msg *m)
462{
463 return msg_word(m, 7);
464}
465
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900466static inline void msg_set_destnode(struct tipc_msg *m, u32 a)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100467{
468 msg_set_word(m, 7, a);
469}
470
Allan Stephensd265fef2010-11-30 12:00:53 +0000471static inline u32 msg_nametype(struct tipc_msg *m)
472{
473 return msg_word(m, 8);
474}
475
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900476static inline void msg_set_nametype(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100477{
478 msg_set_word(m, 8, n);
479}
480
Allan Stephensd265fef2010-11-30 12:00:53 +0000481static inline u32 msg_nameinst(struct tipc_msg *m)
482{
483 return msg_word(m, 9);
484}
485
486static inline u32 msg_namelower(struct tipc_msg *m)
487{
488 return msg_nameinst(m);
489}
490
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900491static inline void msg_set_namelower(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100492{
493 msg_set_word(m, 9, n);
494}
495
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900496static inline void msg_set_nameinst(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100497{
498 msg_set_namelower(m, n);
499}
500
Allan Stephensd265fef2010-11-30 12:00:53 +0000501static inline u32 msg_nameupper(struct tipc_msg *m)
502{
503 return msg_word(m, 10);
504}
505
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900506static inline void msg_set_nameupper(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100507{
508 msg_set_word(m, 10, n);
509}
510
Per Lidenb97bf3f2006-01-02 19:04:38 +0100511/*
Allan Stephenscc4c4352011-04-08 10:50:52 -0400512 * Constants and routines used to read and write TIPC internal message headers
513 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100514
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900515/*
Allan Stephenscc4c4352011-04-08 10:50:52 -0400516 * Connection management protocol message types
Per Lidenb97bf3f2006-01-02 19:04:38 +0100517 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100518#define CONN_PROBE 0
519#define CONN_PROBE_REPLY 1
520#define CONN_ACK 2
521
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900522/*
Allan Stephenscc4c4352011-04-08 10:50:52 -0400523 * Name distributor message types
Per Lidenb97bf3f2006-01-02 19:04:38 +0100524 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100525#define PUBLICATION 0
526#define WITHDRAWAL 1
527
Allan Stephens92138d12011-04-08 11:04:15 -0400528/*
529 * Segmentation message types
530 */
Allan Stephens92138d12011-04-08 11:04:15 -0400531#define FIRST_FRAGMENT 0
532#define FRAGMENT 1
533#define LAST_FRAGMENT 2
534
535/*
536 * Link management protocol message types
537 */
Allan Stephens92138d12011-04-08 11:04:15 -0400538#define STATE_MSG 0
539#define RESET_MSG 1
540#define ACTIVATE_MSG 2
541
542/*
543 * Changeover tunnel message types
544 */
Jon Paul Maloydff29b12015-04-02 09:33:01 -0400545#define SYNCH_MSG 0
546#define FAILOVER_MSG 1
Allan Stephens92138d12011-04-08 11:04:15 -0400547
548/*
549 * Config protocol message types
550 */
Allan Stephens92138d12011-04-08 11:04:15 -0400551#define DSC_REQ_MSG 0
552#define DSC_RESP_MSG 1
553
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900554/*
Jon Maloy75da2162017-10-13 11:04:23 +0200555 * Group protocol message types
556 */
557#define GRP_JOIN_MSG 0
558#define GRP_LEAVE_MSG 1
Jon Maloyb7d42632017-10-13 11:04:26 +0200559#define GRP_ADV_MSG 2
Jon Maloy2f487712017-10-13 11:04:31 +0200560#define GRP_ACK_MSG 3
Jon Maloy04d7b572017-10-13 11:04:34 +0200561#define GRP_RECLAIM_MSG 4
562#define GRP_REMIT_MSG 5
Jon Maloy75da2162017-10-13 11:04:23 +0200563
564/*
Per Lidenb97bf3f2006-01-02 19:04:38 +0100565 * Word 1
566 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100567static inline u32 msg_seq_gap(struct tipc_msg *m)
568{
Allan Stephensbd784532008-06-04 17:47:30 -0700569 return msg_bits(m, 1, 16, 0x1fff);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100570}
571
572static inline void msg_set_seq_gap(struct tipc_msg *m, u32 n)
573{
Allan Stephensbd784532008-06-04 17:47:30 -0700574 msg_set_bits(m, 1, 16, 0x1fff, n);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100575}
576
Allan Stephensfc0eea62011-10-28 16:26:41 -0400577static inline u32 msg_node_sig(struct tipc_msg *m)
578{
579 return msg_bits(m, 1, 0, 0xffff);
580}
581
582static inline void msg_set_node_sig(struct tipc_msg *m, u32 n)
583{
584 msg_set_bits(m, 1, 0, 0xffff, n);
585}
586
Jon Paul Maloy7764d6e2015-03-13 16:08:05 -0400587static inline u32 msg_node_capabilities(struct tipc_msg *m)
588{
589 return msg_bits(m, 1, 15, 0x1fff);
590}
591
592static inline void msg_set_node_capabilities(struct tipc_msg *m, u32 n)
593{
594 msg_set_bits(m, 1, 15, 0x1fff, n);
595}
596
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900597/*
Per Lidenb97bf3f2006-01-02 19:04:38 +0100598 * Word 2
599 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100600static inline u32 msg_dest_domain(struct tipc_msg *m)
601{
602 return msg_word(m, 2);
603}
604
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900605static inline void msg_set_dest_domain(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100606{
607 msg_set_word(m, 2, n);
608}
609
610static inline u32 msg_bcgap_after(struct tipc_msg *m)
611{
612 return msg_bits(m, 2, 16, 0xffff);
613}
614
615static inline void msg_set_bcgap_after(struct tipc_msg *m, u32 n)
616{
617 msg_set_bits(m, 2, 16, 0xffff, n);
618}
619
620static inline u32 msg_bcgap_to(struct tipc_msg *m)
621{
622 return msg_bits(m, 2, 0, 0xffff);
623}
624
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900625static inline void msg_set_bcgap_to(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100626{
627 msg_set_bits(m, 2, 0, 0xffff, n);
628}
629
630
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900631/*
Per Lidenb97bf3f2006-01-02 19:04:38 +0100632 * Word 4
633 */
Per Lidenb97bf3f2006-01-02 19:04:38 +0100634static inline u32 msg_last_bcast(struct tipc_msg *m)
635{
636 return msg_bits(m, 4, 16, 0xffff);
637}
638
Jon Paul Maloy52666982015-10-22 08:51:41 -0400639static inline u32 msg_bc_snd_nxt(struct tipc_msg *m)
640{
641 return msg_last_bcast(m) + 1;
642}
643
Per Lidenb97bf3f2006-01-02 19:04:38 +0100644static inline void msg_set_last_bcast(struct tipc_msg *m, u32 n)
645{
646 msg_set_bits(m, 4, 16, 0xffff, n);
647}
648
Per Lidenb97bf3f2006-01-02 19:04:38 +0100649static inline void msg_set_fragm_no(struct tipc_msg *m, u32 n)
650{
651 msg_set_bits(m, 4, 16, 0xffff, n);
652}
653
654
Jon Paul Maloy6e498152015-07-30 18:24:19 -0400655static inline u16 msg_next_sent(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100656{
657 return msg_bits(m, 4, 0, 0xffff);
658}
659
Jon Paul Maloy6e498152015-07-30 18:24:19 -0400660static inline void msg_set_next_sent(struct tipc_msg *m, u16 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100661{
662 msg_set_bits(m, 4, 0, 0xffff, n);
663}
664
Per Lidenb97bf3f2006-01-02 19:04:38 +0100665static inline void msg_set_long_msgno(struct tipc_msg *m, u32 n)
666{
667 msg_set_bits(m, 4, 0, 0xffff, n);
668}
669
670static inline u32 msg_bc_netid(struct tipc_msg *m)
671{
672 return msg_word(m, 4);
673}
674
675static inline void msg_set_bc_netid(struct tipc_msg *m, u32 id)
676{
677 msg_set_word(m, 4, id);
678}
679
680static inline u32 msg_link_selector(struct tipc_msg *m)
681{
Jon Paul Maloya853e4c2017-01-18 13:50:52 -0500682 if (msg_user(m) == MSG_FRAGMENTER)
683 m = (void *)msg_data(m);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100684 return msg_bits(m, 4, 0, 1);
685}
686
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900687/*
Per Lidenb97bf3f2006-01-02 19:04:38 +0100688 * Word 5
689 */
Jon Paul Maloyd9992972015-07-16 16:54:31 -0400690static inline u16 msg_session(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100691{
692 return msg_bits(m, 5, 16, 0xffff);
693}
694
Jon Paul Maloyd9992972015-07-16 16:54:31 -0400695static inline void msg_set_session(struct tipc_msg *m, u16 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100696{
697 msg_set_bits(m, 5, 16, 0xffff, n);
698}
699
700static inline u32 msg_probe(struct tipc_msg *m)
701{
702 return msg_bits(m, 5, 0, 1);
703}
704
705static inline void msg_set_probe(struct tipc_msg *m, u32 val)
706{
Allan Stephens7eb878e2011-05-25 13:28:27 -0400707 msg_set_bits(m, 5, 0, 1, val);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100708}
709
710static inline char msg_net_plane(struct tipc_msg *m)
711{
712 return msg_bits(m, 5, 1, 7) + 'A';
713}
714
715static inline void msg_set_net_plane(struct tipc_msg *m, char n)
716{
717 msg_set_bits(m, 5, 1, 7, (n - 'A'));
718}
719
720static inline u32 msg_linkprio(struct tipc_msg *m)
721{
722 return msg_bits(m, 5, 4, 0x1f);
723}
724
725static inline void msg_set_linkprio(struct tipc_msg *m, u32 n)
726{
727 msg_set_bits(m, 5, 4, 0x1f, n);
728}
729
730static inline u32 msg_bearer_id(struct tipc_msg *m)
731{
732 return msg_bits(m, 5, 9, 0x7);
733}
734
735static inline void msg_set_bearer_id(struct tipc_msg *m, u32 n)
736{
737 msg_set_bits(m, 5, 9, 0x7, n);
738}
739
740static inline u32 msg_redundant_link(struct tipc_msg *m)
741{
742 return msg_bits(m, 5, 12, 0x1);
743}
744
Allan Stephens77f167f2011-02-28 15:30:20 -0500745static inline void msg_set_redundant_link(struct tipc_msg *m, u32 r)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100746{
Allan Stephens77f167f2011-02-28 15:30:20 -0500747 msg_set_bits(m, 5, 12, 0x1, r);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100748}
749
Jon Paul Maloy634696b2016-04-15 13:33:03 -0400750static inline u32 msg_peer_stopping(struct tipc_msg *m)
751{
752 return msg_bits(m, 5, 13, 0x1);
753}
754
755static inline void msg_set_peer_stopping(struct tipc_msg *m, u32 s)
756{
757 msg_set_bits(m, 5, 13, 0x1, s);
758}
759
Jon Paul Maloy06bd2b12016-10-27 18:51:55 -0400760static inline bool msg_bc_ack_invalid(struct tipc_msg *m)
761{
762 switch (msg_user(m)) {
763 case BCAST_PROTOCOL:
764 case NAME_DISTRIBUTOR:
765 case LINK_PROTOCOL:
766 return msg_bits(m, 5, 14, 0x1);
767 default:
768 return false;
769 }
770}
771
772static inline void msg_set_bc_ack_invalid(struct tipc_msg *m, bool invalid)
773{
774 msg_set_bits(m, 5, 14, 0x1, invalid);
775}
776
Allan Stephens3d749a62011-10-07 15:19:11 -0400777static inline char *msg_media_addr(struct tipc_msg *m)
778{
Erik Hugne91e2eb52015-02-27 08:56:57 +0100779 return (char *)&m->hdr[TIPC_MEDIA_INFO_OFFSET];
Allan Stephens3d749a62011-10-07 15:19:11 -0400780}
Per Lidenb97bf3f2006-01-02 19:04:38 +0100781
Jon Paul Maloy02d11ca2016-09-01 13:52:49 -0400782static inline u32 msg_bc_gap(struct tipc_msg *m)
783{
784 return msg_bits(m, 8, 0, 0x3ff);
785}
786
787static inline void msg_set_bc_gap(struct tipc_msg *m, u32 n)
788{
789 msg_set_bits(m, 8, 0, 0x3ff, n);
790}
791
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900792/*
Per Lidenb97bf3f2006-01-02 19:04:38 +0100793 * Word 9
794 */
Jon Paul Maloy6e498152015-07-30 18:24:19 -0400795static inline u16 msg_msgcnt(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100796{
797 return msg_bits(m, 9, 16, 0xffff);
798}
799
Jon Paul Maloy6e498152015-07-30 18:24:19 -0400800static inline void msg_set_msgcnt(struct tipc_msg *m, u16 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100801{
802 msg_set_bits(m, 9, 16, 0xffff, n);
803}
804
Jon Paul Maloy10724cc2016-05-02 11:58:47 -0400805static inline u32 msg_conn_ack(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100806{
807 return msg_bits(m, 9, 16, 0xffff);
808}
809
Jon Paul Maloy10724cc2016-05-02 11:58:47 -0400810static inline void msg_set_conn_ack(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100811{
812 msg_set_bits(m, 9, 16, 0xffff, n);
813}
814
Jon Maloyb7d42632017-10-13 11:04:26 +0200815static inline u16 msg_adv_win(struct tipc_msg *m)
Jon Paul Maloy10724cc2016-05-02 11:58:47 -0400816{
817 return msg_bits(m, 9, 0, 0xffff);
818}
819
Jon Maloyb7d42632017-10-13 11:04:26 +0200820static inline void msg_set_adv_win(struct tipc_msg *m, u16 n)
Jon Paul Maloy10724cc2016-05-02 11:58:47 -0400821{
822 msg_set_bits(m, 9, 0, 0xffff, n);
823}
824
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900825static inline u32 msg_max_pkt(struct tipc_msg *m)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100826{
Eric Dumazeta02cec22010-09-22 20:43:57 +0000827 return msg_bits(m, 9, 16, 0xffff) * 4;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100828}
829
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +0900830static inline void msg_set_max_pkt(struct tipc_msg *m, u32 n)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100831{
832 msg_set_bits(m, 9, 16, 0xffff, (n / 4));
833}
834
835static inline u32 msg_link_tolerance(struct tipc_msg *m)
836{
837 return msg_bits(m, 9, 0, 0xffff);
838}
839
840static inline void msg_set_link_tolerance(struct tipc_msg *m, u32 n)
841{
842 msg_set_bits(m, 9, 0, 0xffff, n);
843}
844
Jon Maloy75da2162017-10-13 11:04:23 +0200845static inline u16 msg_grp_bc_syncpt(struct tipc_msg *m)
846{
847 return msg_bits(m, 9, 16, 0xffff);
848}
849
850static inline void msg_set_grp_bc_syncpt(struct tipc_msg *m, u16 n)
851{
852 msg_set_bits(m, 9, 16, 0xffff, n);
853}
854
Jon Maloy2f487712017-10-13 11:04:31 +0200855static inline u16 msg_grp_bc_acked(struct tipc_msg *m)
856{
857 return msg_bits(m, 9, 16, 0xffff);
858}
859
860static inline void msg_set_grp_bc_acked(struct tipc_msg *m, u16 n)
861{
862 msg_set_bits(m, 9, 16, 0xffff, n);
863}
864
Jon Maloy04d7b572017-10-13 11:04:34 +0200865static inline u16 msg_grp_remitted(struct tipc_msg *m)
866{
867 return msg_bits(m, 9, 16, 0xffff);
868}
869
870static inline void msg_set_grp_remitted(struct tipc_msg *m, u16 n)
871{
872 msg_set_bits(m, 9, 16, 0xffff, n);
873}
874
Jon Maloy75da2162017-10-13 11:04:23 +0200875/* Word 10
876 */
Jon Maloyae236fb2017-10-13 11:04:25 +0200877static inline u16 msg_grp_evt(struct tipc_msg *m)
878{
879 return msg_bits(m, 10, 0, 0x3);
880}
881
882static inline void msg_set_grp_evt(struct tipc_msg *m, int n)
883{
884 msg_set_bits(m, 10, 0, 0x3, n);
885}
886
Jon Maloy2f487712017-10-13 11:04:31 +0200887static inline u16 msg_grp_bc_ack_req(struct tipc_msg *m)
888{
889 return msg_bits(m, 10, 0, 0x1);
890}
891
892static inline void msg_set_grp_bc_ack_req(struct tipc_msg *m, bool n)
893{
894 msg_set_bits(m, 10, 0, 0x1, n);
895}
896
Jon Maloy75da2162017-10-13 11:04:23 +0200897static inline u16 msg_grp_bc_seqno(struct tipc_msg *m)
898{
899 return msg_bits(m, 10, 16, 0xffff);
900}
901
902static inline void msg_set_grp_bc_seqno(struct tipc_msg *m, u32 n)
903{
904 msg_set_bits(m, 10, 16, 0xffff, n);
905}
906
Jon Paul Maloy6e498152015-07-30 18:24:19 -0400907static inline bool msg_peer_link_is_up(struct tipc_msg *m)
Jon Paul Maloyd9992972015-07-16 16:54:31 -0400908{
909 if (likely(msg_user(m) != LINK_PROTOCOL))
910 return true;
Jon Paul Maloy6e498152015-07-30 18:24:19 -0400911 if (msg_type(m) == STATE_MSG)
912 return true;
913 return false;
Jon Paul Maloyd9992972015-07-16 16:54:31 -0400914}
915
Jon Paul Maloy6e498152015-07-30 18:24:19 -0400916static inline bool msg_peer_node_is_up(struct tipc_msg *m)
Jon Paul Maloy1a20cc22015-07-16 16:54:30 -0400917{
Jon Paul Maloy6e498152015-07-30 18:24:19 -0400918 if (msg_peer_link_is_up(m))
919 return true;
Jon Paul Maloy1a20cc22015-07-16 16:54:30 -0400920 return msg_redundant_link(m);
921}
922
Jon Paul Maloy5b7066c2016-04-07 10:09:14 -0400923static inline bool msg_is_reset(struct tipc_msg *hdr)
924{
925 return (msg_user(hdr) == LINK_PROTOCOL) && (msg_type(hdr) == RESET_MSG);
926}
927
Parthasarathy Bhuvaragan57d5f642017-01-13 15:46:25 +0100928struct sk_buff *tipc_buf_acquire(u32 size, gfp_t gfp);
Jon Maloyd618d092017-11-15 21:23:56 +0100929bool tipc_msg_validate(struct sk_buff **_skb);
Jon Paul Maloybcd3ffd2015-07-22 10:11:19 -0400930bool tipc_msg_reverse(u32 own_addr, struct sk_buff **skb, int err);
Jon Maloy64ac5f52017-10-13 11:04:20 +0200931void tipc_skb_reject(struct net *net, int err, struct sk_buff *skb,
932 struct sk_buff_head *xmitq);
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500933void tipc_msg_init(u32 own_addr, struct tipc_msg *m, u32 user, u32 type,
Ying Xue34747532015-01-09 15:27:10 +0800934 u32 hsize, u32 destnode);
Jon Paul Maloye3a77562015-02-05 08:36:39 -0500935struct sk_buff *tipc_msg_create(uint user, uint type, uint hdr_sz,
936 uint data_sz, u32 dnode, u32 onode,
937 u32 dport, u32 oport, int errcode);
Jon Paul Maloy37e22162014-05-14 05:39:12 -0400938int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf);
Jon Paul Maloydd3f9e72015-05-14 10:46:18 -0400939bool tipc_msg_bundle(struct sk_buff *skb, struct tipc_msg *msg, u32 mtu);
940bool tipc_msg_make_bundle(struct sk_buff **skb, struct tipc_msg *msg,
941 u32 mtu, u32 dnode);
Jon Paul Maloyc637c102015-02-05 08:36:41 -0500942bool tipc_msg_extract(struct sk_buff *skb, struct sk_buff **iskb, int *pos);
Jon Paul Maloyc5898632015-02-05 08:36:36 -0500943int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m,
Ying Xue34747532015-01-09 15:27:10 +0800944 int offset, int dsz, int mtu, struct sk_buff_head *list);
Jon Paul Maloycda36962015-07-22 10:11:20 -0400945bool tipc_msg_lookup_dest(struct net *net, struct sk_buff *skb, int *err);
Jon Maloy4c94cc22017-11-30 16:47:25 +0100946bool tipc_msg_assemble(struct sk_buff_head *list);
Jon Paul Maloy2f566122015-10-22 08:51:39 -0400947bool tipc_msg_reassemble(struct sk_buff_head *list, struct sk_buff_head *rcvq);
Jon Paul Maloya853e4c2017-01-18 13:50:52 -0500948bool tipc_msg_pskb_copy(u32 dst, struct sk_buff_head *msg,
949 struct sk_buff_head *cpy);
Jon Paul Maloy8306f992015-10-15 14:52:43 -0400950void __tipc_skb_queue_sorted(struct sk_buff_head *list, u16 seqno,
951 struct sk_buff *skb);
Jon Paul Maloy078bec82014-07-16 20:41:00 -0400952
Jon Paul Maloye4bf4f72015-05-14 10:46:14 -0400953static inline u16 buf_seqno(struct sk_buff *skb)
954{
955 return msg_seqno(buf_msg(skb));
956}
957
Jon Maloyd618d092017-11-15 21:23:56 +0100958static inline int buf_roundup_len(struct sk_buff *skb)
959{
960 return (skb->len / 1024 + 1) * 1024;
961}
962
Jon Paul Maloycb1b7282015-02-05 08:36:44 -0500963/* tipc_skb_peek(): peek and reserve first buffer in list
964 * @list: list to be peeked in
965 * Returns pointer to first buffer in list, if any
966 */
967static inline struct sk_buff *tipc_skb_peek(struct sk_buff_head *list,
968 spinlock_t *lock)
969{
970 struct sk_buff *skb;
971
972 spin_lock_bh(lock);
973 skb = skb_peek(list);
974 if (skb)
975 skb_get(skb);
976 spin_unlock_bh(lock);
977 return skb;
978}
979
Jon Paul Maloyc637c102015-02-05 08:36:41 -0500980/* tipc_skb_peek_port(): find a destination port, ignoring all destinations
981 * up to and including 'filter'.
982 * Note: ignoring previously tried destinations minimizes the risk of
983 * contention on the socket lock
984 * @list: list to be peeked in
985 * @filter: last destination to be ignored from search
986 * Returns a destination port number, of applicable.
987 */
988static inline u32 tipc_skb_peek_port(struct sk_buff_head *list, u32 filter)
989{
990 struct sk_buff *skb;
991 u32 dport = 0;
992 bool ignore = true;
993
994 spin_lock_bh(&list->lock);
995 skb_queue_walk(list, skb) {
996 dport = msg_destport(buf_msg(skb));
997 if (!filter || skb_queue_is_last(list, skb))
998 break;
999 if (dport == filter)
1000 ignore = false;
1001 else if (!ignore)
1002 break;
1003 }
1004 spin_unlock_bh(&list->lock);
1005 return dport;
1006}
1007
1008/* tipc_skb_dequeue(): unlink first buffer with dest 'dport' from list
1009 * @list: list to be unlinked from
1010 * @dport: selection criteria for buffer to unlink
1011 */
1012static inline struct sk_buff *tipc_skb_dequeue(struct sk_buff_head *list,
1013 u32 dport)
1014{
1015 struct sk_buff *_skb, *tmp, *skb = NULL;
1016
1017 spin_lock_bh(&list->lock);
1018 skb_queue_walk_safe(list, _skb, tmp) {
1019 if (msg_destport(buf_msg(_skb)) == dport) {
1020 __skb_unlink(_skb, list);
1021 skb = _skb;
1022 break;
1023 }
1024 }
1025 spin_unlock_bh(&list->lock);
1026 return skb;
1027}
1028
Jon Paul Maloy598411d2015-07-30 18:24:23 -04001029/* tipc_skb_queue_splice_tail - append an skb list to lock protected list
1030 * @list: the new list to append. Not lock protected
1031 * @head: target list. Lock protected.
1032 */
1033static inline void tipc_skb_queue_splice_tail(struct sk_buff_head *list,
1034 struct sk_buff_head *head)
1035{
1036 spin_lock_bh(&head->lock);
1037 skb_queue_splice_tail(list, head);
1038 spin_unlock_bh(&head->lock);
1039}
1040
1041/* tipc_skb_queue_splice_tail_init - merge two lock protected skb lists
1042 * @list: the new list to add. Lock protected. Will be reinitialized
1043 * @head: target list. Lock protected.
1044 */
1045static inline void tipc_skb_queue_splice_tail_init(struct sk_buff_head *list,
1046 struct sk_buff_head *head)
1047{
1048 struct sk_buff_head tmp;
1049
1050 __skb_queue_head_init(&tmp);
1051
1052 spin_lock_bh(&list->lock);
1053 skb_queue_splice_tail_init(list, &tmp);
1054 spin_unlock_bh(&list->lock);
1055 tipc_skb_queue_splice_tail(&tmp, head);
1056}
1057
Per Lidenb97bf3f2006-01-02 19:04:38 +01001058#endif