blob: e56b9b87547d39bfd77737b72297924e50f9eb57 [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/msg.c: TIPC message header routines
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
Per Liden593a5f22006-01-11 19:14:19 +01004 * Copyright (c) 2000-2006, Ericsson AB
Allan Stephens741de3e2011-01-25 13:33:31 -05005 * Copyright (c) 2005, 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#include "core.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010038#include "msg.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010039
Allan Stephens23461e82010-05-11 14:30:18 +000040u32 tipc_msg_tot_importance(struct tipc_msg *m)
41{
42 if (likely(msg_isdata(m))) {
43 if (likely(msg_orignode(m) == tipc_own_addr))
44 return msg_importance(m);
45 return msg_importance(m) + 4;
46 }
47 if ((msg_user(m) == MSG_FRAGMENTER) &&
48 (msg_type(m) == FIRST_FRAGMENT))
49 return msg_importance(msg_get_wrapped(m));
50 return msg_importance(m);
51}
52
53
54void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
55 u32 hsize, u32 destnode)
56{
57 memset(m, 0, hsize);
58 msg_set_version(m);
59 msg_set_user(m, user);
60 msg_set_hdr_sz(m, hsize);
61 msg_set_size(m, hsize);
62 msg_set_prevnode(m, tipc_own_addr);
63 msg_set_type(m, type);
64 if (!msg_short(m)) {
65 msg_set_orignode(m, tipc_own_addr);
66 msg_set_destnode(m, destnode);
67 }
68}
69
70/**
71 * tipc_msg_calc_data_size - determine total data size for message
72 */
73
74int tipc_msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect)
75{
76 int dsz = 0;
77 int i;
78
79 for (i = 0; i < num_sect; i++)
80 dsz += msg_sect[i].iov_len;
81 return dsz;
82}
83
84/**
85 * tipc_msg_build - create message using specified header and data
86 *
87 * Note: Caller must not hold any locks in case copy_from_user() is interrupted!
88 *
89 * Returns message data size or errno
90 */
91
92int tipc_msg_build(struct tipc_msg *hdr,
93 struct iovec const *msg_sect, u32 num_sect,
Allan Stephens0e659672010-12-31 18:59:32 +000094 int max_size, int usrmem, struct sk_buff **buf)
Allan Stephens23461e82010-05-11 14:30:18 +000095{
96 int dsz, sz, hsz, pos, res, cnt;
97
98 dsz = tipc_msg_calc_data_size(msg_sect, num_sect);
99 if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) {
100 *buf = NULL;
101 return -EINVAL;
102 }
103
104 pos = hsz = msg_hdr_sz(hdr);
105 sz = hsz + dsz;
106 msg_set_size(hdr, sz);
107 if (unlikely(sz > max_size)) {
108 *buf = NULL;
109 return dsz;
110 }
111
stephen hemminger31e3c3f2010-10-13 13:20:35 +0000112 *buf = tipc_buf_acquire(sz);
Allan Stephens23461e82010-05-11 14:30:18 +0000113 if (!(*buf))
114 return -ENOMEM;
115 skb_copy_to_linear_data(*buf, hdr, hsz);
116 for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) {
117 if (likely(usrmem))
118 res = !copy_from_user((*buf)->data + pos,
119 msg_sect[cnt].iov_base,
120 msg_sect[cnt].iov_len);
121 else
122 skb_copy_to_linear_data_offset(*buf, pos,
123 msg_sect[cnt].iov_base,
124 msg_sect[cnt].iov_len);
125 pos += msg_sect[cnt].iov_len;
126 }
127 if (likely(res))
128 return dsz;
129
130 buf_discard(*buf);
131 *buf = NULL;
132 return -EFAULT;
133}
Per Lidenb97bf3f2006-01-02 19:04:38 +0100134
Allan Stephens48c97132008-05-05 01:24:06 -0700135#ifdef CONFIG_TIPC_DEBUG
136
137void tipc_msg_dbg(struct print_buf *buf, struct tipc_msg *msg, const char *str)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100138{
139 u32 usr = msg_user(msg);
Allan Stephens6e7e3092010-12-31 18:59:28 +0000140 tipc_printf(buf, KERN_DEBUG);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100141 tipc_printf(buf, str);
142
143 switch (usr) {
144 case MSG_BUNDLER:
145 tipc_printf(buf, "BNDL::");
146 tipc_printf(buf, "MSGS(%u):", msg_msgcnt(msg));
147 break;
148 case BCAST_PROTOCOL:
149 tipc_printf(buf, "BCASTP::");
150 break;
151 case MSG_FRAGMENTER:
152 tipc_printf(buf, "FRAGM::");
153 switch (msg_type(msg)) {
154 case FIRST_FRAGMENT:
155 tipc_printf(buf, "FIRST:");
156 break;
157 case FRAGMENT:
158 tipc_printf(buf, "BODY:");
159 break;
160 case LAST_FRAGMENT:
161 tipc_printf(buf, "LAST:");
162 break;
163 default:
Allan Stephens0e659672010-12-31 18:59:32 +0000164 tipc_printf(buf, "UNKNOWN:%x", msg_type(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100165
166 }
Allan Stephens0e659672010-12-31 18:59:32 +0000167 tipc_printf(buf, "NO(%u/%u):", msg_long_msgno(msg),
Per Lidenb97bf3f2006-01-02 19:04:38 +0100168 msg_fragm_no(msg));
169 break;
Allan Stephens06d82c92008-03-06 15:06:55 -0800170 case TIPC_LOW_IMPORTANCE:
171 case TIPC_MEDIUM_IMPORTANCE:
172 case TIPC_HIGH_IMPORTANCE:
173 case TIPC_CRITICAL_IMPORTANCE:
Per Lidenb97bf3f2006-01-02 19:04:38 +0100174 tipc_printf(buf, "DAT%u:", msg_user(msg));
175 if (msg_short(msg)) {
176 tipc_printf(buf, "CON:");
177 break;
178 }
179 switch (msg_type(msg)) {
180 case TIPC_CONN_MSG:
181 tipc_printf(buf, "CON:");
182 break;
183 case TIPC_MCAST_MSG:
184 tipc_printf(buf, "MCST:");
185 break;
186 case TIPC_NAMED_MSG:
187 tipc_printf(buf, "NAM:");
188 break;
189 case TIPC_DIRECT_MSG:
190 tipc_printf(buf, "DIR:");
191 break;
192 default:
Allan Stephens0e659672010-12-31 18:59:32 +0000193 tipc_printf(buf, "UNKNOWN TYPE %u", msg_type(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100194 }
195 if (msg_routed(msg) && !msg_non_seq(msg))
196 tipc_printf(buf, "ROUT:");
197 if (msg_reroute_cnt(msg))
198 tipc_printf(buf, "REROUTED(%u):",
199 msg_reroute_cnt(msg));
200 break;
201 case NAME_DISTRIBUTOR:
202 tipc_printf(buf, "NMD::");
203 switch (msg_type(msg)) {
204 case PUBLICATION:
205 tipc_printf(buf, "PUBL(%u):", (msg_size(msg) - msg_hdr_sz(msg)) / 20); /* Items */
206 break;
207 case WITHDRAWAL:
208 tipc_printf(buf, "WDRW:");
209 break;
210 default:
Allan Stephens0e659672010-12-31 18:59:32 +0000211 tipc_printf(buf, "UNKNOWN:%x", msg_type(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100212 }
213 if (msg_routed(msg))
214 tipc_printf(buf, "ROUT:");
215 if (msg_reroute_cnt(msg))
216 tipc_printf(buf, "REROUTED(%u):",
217 msg_reroute_cnt(msg));
218 break;
219 case CONN_MANAGER:
220 tipc_printf(buf, "CONN_MNG:");
221 switch (msg_type(msg)) {
222 case CONN_PROBE:
223 tipc_printf(buf, "PROBE:");
224 break;
225 case CONN_PROBE_REPLY:
226 tipc_printf(buf, "PROBE_REPLY:");
227 break;
228 case CONN_ACK:
229 tipc_printf(buf, "CONN_ACK:");
Allan Stephens0e659672010-12-31 18:59:32 +0000230 tipc_printf(buf, "ACK(%u):", msg_msgcnt(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100231 break;
232 default:
Allan Stephens0e659672010-12-31 18:59:32 +0000233 tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100234 }
235 if (msg_routed(msg))
236 tipc_printf(buf, "ROUT:");
237 if (msg_reroute_cnt(msg))
Allan Stephens0e659672010-12-31 18:59:32 +0000238 tipc_printf(buf, "REROUTED(%u):", msg_reroute_cnt(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100239 break;
240 case LINK_PROTOCOL:
Allan Stephens0e659672010-12-31 18:59:32 +0000241 tipc_printf(buf, "PROT:TIM(%u):", msg_timestamp(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100242 switch (msg_type(msg)) {
243 case STATE_MSG:
244 tipc_printf(buf, "STATE:");
Allan Stephens0e659672010-12-31 18:59:32 +0000245 tipc_printf(buf, "%s:", msg_probe(msg) ? "PRB" : "");
246 tipc_printf(buf, "NXS(%u):", msg_next_sent(msg));
247 tipc_printf(buf, "GAP(%u):", msg_seq_gap(msg));
248 tipc_printf(buf, "LSTBC(%u):", msg_last_bcast(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100249 break;
250 case RESET_MSG:
251 tipc_printf(buf, "RESET:");
252 if (msg_size(msg) != msg_hdr_sz(msg))
Allan Stephens0e659672010-12-31 18:59:32 +0000253 tipc_printf(buf, "BEAR:%s:", msg_data(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100254 break;
255 case ACTIVATE_MSG:
256 tipc_printf(buf, "ACTIVATE:");
257 break;
258 default:
Allan Stephens0e659672010-12-31 18:59:32 +0000259 tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100260 }
Allan Stephens0e659672010-12-31 18:59:32 +0000261 tipc_printf(buf, "PLANE(%c):", msg_net_plane(msg));
262 tipc_printf(buf, "SESS(%u):", msg_session(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100263 break;
264 case CHANGEOVER_PROTOCOL:
265 tipc_printf(buf, "TUNL:");
266 switch (msg_type(msg)) {
267 case DUPLICATE_MSG:
268 tipc_printf(buf, "DUPL:");
269 break;
270 case ORIGINAL_MSG:
271 tipc_printf(buf, "ORIG:");
Allan Stephens0e659672010-12-31 18:59:32 +0000272 tipc_printf(buf, "EXP(%u)", msg_msgcnt(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100273 break;
274 default:
Allan Stephens0e659672010-12-31 18:59:32 +0000275 tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100276 }
277 break;
278 case ROUTE_DISTRIBUTOR:
279 tipc_printf(buf, "ROUTING_MNG:");
280 switch (msg_type(msg)) {
281 case EXT_ROUTING_TABLE:
282 tipc_printf(buf, "EXT_TBL:");
Allan Stephens0e659672010-12-31 18:59:32 +0000283 tipc_printf(buf, "TO:%x:", msg_remote_node(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100284 break;
285 case LOCAL_ROUTING_TABLE:
286 tipc_printf(buf, "LOCAL_TBL:");
Allan Stephens0e659672010-12-31 18:59:32 +0000287 tipc_printf(buf, "TO:%x:", msg_remote_node(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100288 break;
289 case SLAVE_ROUTING_TABLE:
290 tipc_printf(buf, "DP_TBL:");
Allan Stephens0e659672010-12-31 18:59:32 +0000291 tipc_printf(buf, "TO:%x:", msg_remote_node(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100292 break;
293 case ROUTE_ADDITION:
294 tipc_printf(buf, "ADD:");
Allan Stephens0e659672010-12-31 18:59:32 +0000295 tipc_printf(buf, "TO:%x:", msg_remote_node(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100296 break;
297 case ROUTE_REMOVAL:
298 tipc_printf(buf, "REMOVE:");
Allan Stephens0e659672010-12-31 18:59:32 +0000299 tipc_printf(buf, "TO:%x:", msg_remote_node(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100300 break;
301 default:
Allan Stephens0e659672010-12-31 18:59:32 +0000302 tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100303 }
304 break;
305 case LINK_CONFIG:
306 tipc_printf(buf, "CFG:");
307 switch (msg_type(msg)) {
308 case DSC_REQ_MSG:
309 tipc_printf(buf, "DSC_REQ:");
310 break;
311 case DSC_RESP_MSG:
312 tipc_printf(buf, "DSC_RESP:");
313 break;
314 default:
Allan Stephens0e659672010-12-31 18:59:32 +0000315 tipc_printf(buf, "UNKNOWN TYPE:%x:", msg_type(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100316 break;
317 }
318 break;
319 default:
320 tipc_printf(buf, "UNKNOWN USER:");
321 }
322
323 switch (usr) {
324 case CONN_MANAGER:
Allan Stephens06d82c92008-03-06 15:06:55 -0800325 case TIPC_LOW_IMPORTANCE:
326 case TIPC_MEDIUM_IMPORTANCE:
327 case TIPC_HIGH_IMPORTANCE:
328 case TIPC_CRITICAL_IMPORTANCE:
Per Lidenb97bf3f2006-01-02 19:04:38 +0100329 switch (msg_errcode(msg)) {
330 case TIPC_OK:
331 break;
332 case TIPC_ERR_NO_NAME:
333 tipc_printf(buf, "NO_NAME:");
334 break;
335 case TIPC_ERR_NO_PORT:
336 tipc_printf(buf, "NO_PORT:");
337 break;
338 case TIPC_ERR_NO_NODE:
339 tipc_printf(buf, "NO_PROC:");
340 break;
341 case TIPC_ERR_OVERLOAD:
342 tipc_printf(buf, "OVERLOAD:");
343 break;
344 case TIPC_CONN_SHUTDOWN:
345 tipc_printf(buf, "SHUTDOWN:");
346 break;
347 default:
348 tipc_printf(buf, "UNKNOWN ERROR(%x):",
349 msg_errcode(msg));
350 }
Allan Stephensa0168922010-12-31 18:59:35 +0000351 default:
352 break;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100353 }
354
355 tipc_printf(buf, "HZ(%u):", msg_hdr_sz(msg));
356 tipc_printf(buf, "SZ(%u):", msg_size(msg));
357 tipc_printf(buf, "SQNO(%u):", msg_seqno(msg));
358
359 if (msg_non_seq(msg))
360 tipc_printf(buf, "NOSEQ:");
Allan Stephensa0168922010-12-31 18:59:35 +0000361 else
Per Lidenb97bf3f2006-01-02 19:04:38 +0100362 tipc_printf(buf, "ACK(%u):", msg_ack(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100363 tipc_printf(buf, "BACK(%u):", msg_bcast_ack(msg));
364 tipc_printf(buf, "PRND(%x)", msg_prevnode(msg));
365
366 if (msg_isdata(msg)) {
367 if (msg_named(msg)) {
368 tipc_printf(buf, "NTYP(%u):", msg_nametype(msg));
369 tipc_printf(buf, "NINST(%u)", msg_nameinst(msg));
370 }
371 }
372
373 if ((usr != LINK_PROTOCOL) && (usr != LINK_CONFIG) &&
374 (usr != MSG_BUNDLER)) {
375 if (!msg_short(msg)) {
376 tipc_printf(buf, ":ORIG(%x:%u):",
377 msg_orignode(msg), msg_origport(msg));
378 tipc_printf(buf, ":DEST(%x:%u):",
379 msg_destnode(msg), msg_destport(msg));
380 } else {
381 tipc_printf(buf, ":OPRT(%u):", msg_origport(msg));
382 tipc_printf(buf, ":DPRT(%u):", msg_destport(msg));
383 }
Per Lidenb97bf3f2006-01-02 19:04:38 +0100384 }
385 if (msg_user(msg) == NAME_DISTRIBUTOR) {
386 tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg));
387 tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg));
Per Lidenb97bf3f2006-01-02 19:04:38 +0100388 }
389
390 if (msg_user(msg) == LINK_CONFIG) {
Allan Stephens0e659672010-12-31 18:59:32 +0000391 u32 *raw = (u32 *)msg;
392 struct tipc_media_addr *orig = (struct tipc_media_addr *)&raw[5];
Per Lidenb97bf3f2006-01-02 19:04:38 +0100393 tipc_printf(buf, ":REQL(%u):", msg_req_links(msg));
394 tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg));
395 tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg));
Per Liden4323add2006-01-18 00:38:21 +0100396 tipc_media_addr_printf(buf, orig);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100397 }
398 if (msg_user(msg) == BCAST_PROTOCOL) {
399 tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg));
400 tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg));
401 }
402 tipc_printf(buf, "\n");
Allan Stephensa0168922010-12-31 18:59:35 +0000403 if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg)))
Allan Stephens48c97132008-05-05 01:24:06 -0700404 tipc_msg_dbg(buf, msg_get_wrapped(msg), " /");
Allan Stephensa0168922010-12-31 18:59:35 +0000405 if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT))
Allan Stephens48c97132008-05-05 01:24:06 -0700406 tipc_msg_dbg(buf, msg_get_wrapped(msg), " /");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100407}
Allan Stephens48c97132008-05-05 01:24:06 -0700408
409#endif