blob: a029cdc2df6d0663bcefa7c8a693d35f6ad819a1 [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
Per Lidenb97bf3f2006-01-02 19:04:38 +01005 * Copyright (c) 2005, 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"
38#include "addr.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010039#include "msg.h"
Per Lidenb97bf3f2006-01-02 19:04:38 +010040
Allan Stephens23461e82010-05-11 14:30:18 +000041u32 tipc_msg_tot_importance(struct tipc_msg *m)
42{
43 if (likely(msg_isdata(m))) {
44 if (likely(msg_orignode(m) == tipc_own_addr))
45 return msg_importance(m);
46 return msg_importance(m) + 4;
47 }
48 if ((msg_user(m) == MSG_FRAGMENTER) &&
49 (msg_type(m) == FIRST_FRAGMENT))
50 return msg_importance(msg_get_wrapped(m));
51 return msg_importance(m);
52}
53
54
55void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
56 u32 hsize, u32 destnode)
57{
58 memset(m, 0, hsize);
59 msg_set_version(m);
60 msg_set_user(m, user);
61 msg_set_hdr_sz(m, hsize);
62 msg_set_size(m, hsize);
63 msg_set_prevnode(m, tipc_own_addr);
64 msg_set_type(m, type);
65 if (!msg_short(m)) {
66 msg_set_orignode(m, tipc_own_addr);
67 msg_set_destnode(m, destnode);
68 }
69}
70
71/**
72 * tipc_msg_calc_data_size - determine total data size for message
73 */
74
75int tipc_msg_calc_data_size(struct iovec const *msg_sect, u32 num_sect)
76{
77 int dsz = 0;
78 int i;
79
80 for (i = 0; i < num_sect; i++)
81 dsz += msg_sect[i].iov_len;
82 return dsz;
83}
84
85/**
86 * tipc_msg_build - create message using specified header and data
87 *
88 * Note: Caller must not hold any locks in case copy_from_user() is interrupted!
89 *
90 * Returns message data size or errno
91 */
92
93int tipc_msg_build(struct tipc_msg *hdr,
94 struct iovec const *msg_sect, u32 num_sect,
95 int max_size, int usrmem, struct sk_buff** buf)
96{
97 int dsz, sz, hsz, pos, res, cnt;
98
99 dsz = tipc_msg_calc_data_size(msg_sect, num_sect);
100 if (unlikely(dsz > TIPC_MAX_USER_MSG_SIZE)) {
101 *buf = NULL;
102 return -EINVAL;
103 }
104
105 pos = hsz = msg_hdr_sz(hdr);
106 sz = hsz + dsz;
107 msg_set_size(hdr, sz);
108 if (unlikely(sz > max_size)) {
109 *buf = NULL;
110 return dsz;
111 }
112
stephen hemminger31e3c3f2010-10-13 13:20:35 +0000113 *buf = tipc_buf_acquire(sz);
Allan Stephens23461e82010-05-11 14:30:18 +0000114 if (!(*buf))
115 return -ENOMEM;
116 skb_copy_to_linear_data(*buf, hdr, hsz);
117 for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) {
118 if (likely(usrmem))
119 res = !copy_from_user((*buf)->data + pos,
120 msg_sect[cnt].iov_base,
121 msg_sect[cnt].iov_len);
122 else
123 skb_copy_to_linear_data_offset(*buf, pos,
124 msg_sect[cnt].iov_base,
125 msg_sect[cnt].iov_len);
126 pos += msg_sect[cnt].iov_len;
127 }
128 if (likely(res))
129 return dsz;
130
131 buf_discard(*buf);
132 *buf = NULL;
133 return -EFAULT;
134}
Per Lidenb97bf3f2006-01-02 19:04:38 +0100135
Allan Stephens48c97132008-05-05 01:24:06 -0700136#ifdef CONFIG_TIPC_DEBUG
137
138void tipc_msg_dbg(struct print_buf *buf, struct tipc_msg *msg, const char *str)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100139{
140 u32 usr = msg_user(msg);
Allan Stephens6e7e3092010-12-31 18:59:28 +0000141 tipc_printf(buf, KERN_DEBUG);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100142 tipc_printf(buf, str);
143
144 switch (usr) {
145 case MSG_BUNDLER:
146 tipc_printf(buf, "BNDL::");
147 tipc_printf(buf, "MSGS(%u):", msg_msgcnt(msg));
148 break;
149 case BCAST_PROTOCOL:
150 tipc_printf(buf, "BCASTP::");
151 break;
152 case MSG_FRAGMENTER:
153 tipc_printf(buf, "FRAGM::");
154 switch (msg_type(msg)) {
155 case FIRST_FRAGMENT:
156 tipc_printf(buf, "FIRST:");
157 break;
158 case FRAGMENT:
159 tipc_printf(buf, "BODY:");
160 break;
161 case LAST_FRAGMENT:
162 tipc_printf(buf, "LAST:");
163 break;
164 default:
165 tipc_printf(buf, "UNKNOWN:%x",msg_type(msg));
166
167 }
168 tipc_printf(buf, "NO(%u/%u):",msg_long_msgno(msg),
169 msg_fragm_no(msg));
170 break;
Allan Stephens06d82c92008-03-06 15:06:55 -0800171 case TIPC_LOW_IMPORTANCE:
172 case TIPC_MEDIUM_IMPORTANCE:
173 case TIPC_HIGH_IMPORTANCE:
174 case TIPC_CRITICAL_IMPORTANCE:
Per Lidenb97bf3f2006-01-02 19:04:38 +0100175 tipc_printf(buf, "DAT%u:", msg_user(msg));
176 if (msg_short(msg)) {
177 tipc_printf(buf, "CON:");
178 break;
179 }
180 switch (msg_type(msg)) {
181 case TIPC_CONN_MSG:
182 tipc_printf(buf, "CON:");
183 break;
184 case TIPC_MCAST_MSG:
185 tipc_printf(buf, "MCST:");
186 break;
187 case TIPC_NAMED_MSG:
188 tipc_printf(buf, "NAM:");
189 break;
190 case TIPC_DIRECT_MSG:
191 tipc_printf(buf, "DIR:");
192 break;
193 default:
194 tipc_printf(buf, "UNKNOWN TYPE %u",msg_type(msg));
195 }
196 if (msg_routed(msg) && !msg_non_seq(msg))
197 tipc_printf(buf, "ROUT:");
198 if (msg_reroute_cnt(msg))
199 tipc_printf(buf, "REROUTED(%u):",
200 msg_reroute_cnt(msg));
201 break;
202 case NAME_DISTRIBUTOR:
203 tipc_printf(buf, "NMD::");
204 switch (msg_type(msg)) {
205 case PUBLICATION:
206 tipc_printf(buf, "PUBL(%u):", (msg_size(msg) - msg_hdr_sz(msg)) / 20); /* Items */
207 break;
208 case WITHDRAWAL:
209 tipc_printf(buf, "WDRW:");
210 break;
211 default:
212 tipc_printf(buf, "UNKNOWN:%x",msg_type(msg));
213 }
214 if (msg_routed(msg))
215 tipc_printf(buf, "ROUT:");
216 if (msg_reroute_cnt(msg))
217 tipc_printf(buf, "REROUTED(%u):",
218 msg_reroute_cnt(msg));
219 break;
220 case CONN_MANAGER:
221 tipc_printf(buf, "CONN_MNG:");
222 switch (msg_type(msg)) {
223 case CONN_PROBE:
224 tipc_printf(buf, "PROBE:");
225 break;
226 case CONN_PROBE_REPLY:
227 tipc_printf(buf, "PROBE_REPLY:");
228 break;
229 case CONN_ACK:
230 tipc_printf(buf, "CONN_ACK:");
231 tipc_printf(buf, "ACK(%u):",msg_msgcnt(msg));
232 break;
233 default:
234 tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg));
235 }
236 if (msg_routed(msg))
237 tipc_printf(buf, "ROUT:");
238 if (msg_reroute_cnt(msg))
239 tipc_printf(buf, "REROUTED(%u):",msg_reroute_cnt(msg));
240 break;
241 case LINK_PROTOCOL:
242 tipc_printf(buf, "PROT:TIM(%u):",msg_timestamp(msg));
243 switch (msg_type(msg)) {
244 case STATE_MSG:
245 tipc_printf(buf, "STATE:");
246 tipc_printf(buf, "%s:",msg_probe(msg) ? "PRB" :"");
247 tipc_printf(buf, "NXS(%u):",msg_next_sent(msg));
248 tipc_printf(buf, "GAP(%u):",msg_seq_gap(msg));
249 tipc_printf(buf, "LSTBC(%u):",msg_last_bcast(msg));
250 break;
251 case RESET_MSG:
252 tipc_printf(buf, "RESET:");
253 if (msg_size(msg) != msg_hdr_sz(msg))
254 tipc_printf(buf, "BEAR:%s:",msg_data(msg));
255 break;
256 case ACTIVATE_MSG:
257 tipc_printf(buf, "ACTIVATE:");
258 break;
259 default:
260 tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg));
261 }
262 tipc_printf(buf, "PLANE(%c):",msg_net_plane(msg));
263 tipc_printf(buf, "SESS(%u):",msg_session(msg));
264 break;
265 case CHANGEOVER_PROTOCOL:
266 tipc_printf(buf, "TUNL:");
267 switch (msg_type(msg)) {
268 case DUPLICATE_MSG:
269 tipc_printf(buf, "DUPL:");
270 break;
271 case ORIGINAL_MSG:
272 tipc_printf(buf, "ORIG:");
273 tipc_printf(buf, "EXP(%u)",msg_msgcnt(msg));
274 break;
275 default:
276 tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg));
277 }
278 break;
279 case ROUTE_DISTRIBUTOR:
280 tipc_printf(buf, "ROUTING_MNG:");
281 switch (msg_type(msg)) {
282 case EXT_ROUTING_TABLE:
283 tipc_printf(buf, "EXT_TBL:");
284 tipc_printf(buf, "TO:%x:",msg_remote_node(msg));
285 break;
286 case LOCAL_ROUTING_TABLE:
287 tipc_printf(buf, "LOCAL_TBL:");
288 tipc_printf(buf, "TO:%x:",msg_remote_node(msg));
289 break;
290 case SLAVE_ROUTING_TABLE:
291 tipc_printf(buf, "DP_TBL:");
292 tipc_printf(buf, "TO:%x:",msg_remote_node(msg));
293 break;
294 case ROUTE_ADDITION:
295 tipc_printf(buf, "ADD:");
296 tipc_printf(buf, "TO:%x:",msg_remote_node(msg));
297 break;
298 case ROUTE_REMOVAL:
299 tipc_printf(buf, "REMOVE:");
300 tipc_printf(buf, "TO:%x:",msg_remote_node(msg));
301 break;
302 default:
303 tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg));
304 }
305 break;
306 case LINK_CONFIG:
307 tipc_printf(buf, "CFG:");
308 switch (msg_type(msg)) {
309 case DSC_REQ_MSG:
310 tipc_printf(buf, "DSC_REQ:");
311 break;
312 case DSC_RESP_MSG:
313 tipc_printf(buf, "DSC_RESP:");
314 break;
315 default:
316 tipc_printf(buf, "UNKNOWN TYPE:%x:",msg_type(msg));
317 break;
318 }
319 break;
320 default:
321 tipc_printf(buf, "UNKNOWN USER:");
322 }
323
324 switch (usr) {
325 case CONN_MANAGER:
Allan Stephens06d82c92008-03-06 15:06:55 -0800326 case TIPC_LOW_IMPORTANCE:
327 case TIPC_MEDIUM_IMPORTANCE:
328 case TIPC_HIGH_IMPORTANCE:
329 case TIPC_CRITICAL_IMPORTANCE:
Per Lidenb97bf3f2006-01-02 19:04:38 +0100330 switch (msg_errcode(msg)) {
331 case TIPC_OK:
332 break;
333 case TIPC_ERR_NO_NAME:
334 tipc_printf(buf, "NO_NAME:");
335 break;
336 case TIPC_ERR_NO_PORT:
337 tipc_printf(buf, "NO_PORT:");
338 break;
339 case TIPC_ERR_NO_NODE:
340 tipc_printf(buf, "NO_PROC:");
341 break;
342 case TIPC_ERR_OVERLOAD:
343 tipc_printf(buf, "OVERLOAD:");
344 break;
345 case TIPC_CONN_SHUTDOWN:
346 tipc_printf(buf, "SHUTDOWN:");
347 break;
348 default:
349 tipc_printf(buf, "UNKNOWN ERROR(%x):",
350 msg_errcode(msg));
351 }
352 default:{}
353 }
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:");
361 else {
362 tipc_printf(buf, "ACK(%u):", msg_ack(msg));
363 }
364 tipc_printf(buf, "BACK(%u):", msg_bcast_ack(msg));
365 tipc_printf(buf, "PRND(%x)", msg_prevnode(msg));
366
367 if (msg_isdata(msg)) {
368 if (msg_named(msg)) {
369 tipc_printf(buf, "NTYP(%u):", msg_nametype(msg));
370 tipc_printf(buf, "NINST(%u)", msg_nameinst(msg));
371 }
372 }
373
374 if ((usr != LINK_PROTOCOL) && (usr != LINK_CONFIG) &&
375 (usr != MSG_BUNDLER)) {
376 if (!msg_short(msg)) {
377 tipc_printf(buf, ":ORIG(%x:%u):",
378 msg_orignode(msg), msg_origport(msg));
379 tipc_printf(buf, ":DEST(%x:%u):",
380 msg_destnode(msg), msg_destport(msg));
381 } else {
382 tipc_printf(buf, ":OPRT(%u):", msg_origport(msg));
383 tipc_printf(buf, ":DPRT(%u):", msg_destport(msg));
384 }
385 if (msg_routed(msg) && !msg_non_seq(msg))
386 tipc_printf(buf, ":TSEQN(%u)", msg_transp_seqno(msg));
387 }
388 if (msg_user(msg) == NAME_DISTRIBUTOR) {
389 tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg));
390 tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg));
391 if (msg_routed(msg)) {
392 tipc_printf(buf, ":CSEQN(%u)", msg_transp_seqno(msg));
393 }
394 }
395
396 if (msg_user(msg) == LINK_CONFIG) {
397 u32* raw = (u32*)msg;
398 struct tipc_media_addr* orig = (struct tipc_media_addr*)&raw[5];
399 tipc_printf(buf, ":REQL(%u):", msg_req_links(msg));
400 tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg));
401 tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg));
Per Liden4323add2006-01-18 00:38:21 +0100402 tipc_media_addr_printf(buf, orig);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100403 }
404 if (msg_user(msg) == BCAST_PROTOCOL) {
405 tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg));
406 tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg));
407 }
408 tipc_printf(buf, "\n");
409 if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg))) {
Allan Stephens48c97132008-05-05 01:24:06 -0700410 tipc_msg_dbg(buf, msg_get_wrapped(msg), " /");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100411 }
412 if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT)) {
Allan Stephens48c97132008-05-05 01:24:06 -0700413 tipc_msg_dbg(buf, msg_get_wrapped(msg), " /");
Per Lidenb97bf3f2006-01-02 19:04:38 +0100414 }
415}
Allan Stephens48c97132008-05-05 01:24:06 -0700416
417#endif