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b97bf3fd PL |
1 | /* |
2 | * net/tipc/msg.c: TIPC message header routines | |
c4307285 | 3 | * |
593a5f22 | 4 | * Copyright (c) 2000-2006, Ericsson AB |
b97bf3fd | 5 | * Copyright (c) 2005, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
11 | * 1. Redistributions of source code must retain the above copyright |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. Neither the names of the copyright holders nor the names of its | |
17 | * contributors may be used to endorse or promote products derived from | |
18 | * this software without specific prior written permission. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
20 | * Alternatively, this software may be distributed under the terms of the |
21 | * GNU General Public License ("GPL") version 2 as published by the Free | |
22 | * Software Foundation. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | |
28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #include "core.h" | |
b97bf3fd | 38 | #include "msg.h" |
b97bf3fd | 39 | |
23461e83 AS |
40 | u32 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 | ||
54 | void 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 | ||
74 | int 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 | ||
92 | int tipc_msg_build(struct tipc_msg *hdr, | |
93 | struct iovec const *msg_sect, u32 num_sect, | |
94 | int max_size, int usrmem, struct sk_buff** buf) | |
95 | { | |
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 | ||
31e3c3f6 | 112 | *buf = tipc_buf_acquire(sz); |
23461e83 AS |
113 | 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 | } | |
b97bf3fd | 134 | |
48c97139 AS |
135 | #ifdef CONFIG_TIPC_DEBUG |
136 | ||
137 | void tipc_msg_dbg(struct print_buf *buf, struct tipc_msg *msg, const char *str) | |
b97bf3fd PL |
138 | { |
139 | u32 usr = msg_user(msg); | |
6e7e309c | 140 | tipc_printf(buf, KERN_DEBUG); |
b97bf3fd PL |
141 | 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: | |
164 | tipc_printf(buf, "UNKNOWN:%x",msg_type(msg)); | |
165 | ||
166 | } | |
167 | tipc_printf(buf, "NO(%u/%u):",msg_long_msgno(msg), | |
168 | msg_fragm_no(msg)); | |
169 | break; | |
06d82c91 AS |
170 | case TIPC_LOW_IMPORTANCE: |
171 | case TIPC_MEDIUM_IMPORTANCE: | |
172 | case TIPC_HIGH_IMPORTANCE: | |
173 | case TIPC_CRITICAL_IMPORTANCE: | |
b97bf3fd PL |
174 | 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: | |
193 | tipc_printf(buf, "UNKNOWN TYPE %u",msg_type(msg)); | |
194 | } | |
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: | |
211 | tipc_printf(buf, "UNKNOWN:%x",msg_type(msg)); | |
212 | } | |
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:"); | |
230 | tipc_printf(buf, "ACK(%u):",msg_msgcnt(msg)); | |
231 | break; | |
232 | default: | |
233 | tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); | |
234 | } | |
235 | if (msg_routed(msg)) | |
236 | tipc_printf(buf, "ROUT:"); | |
237 | if (msg_reroute_cnt(msg)) | |
238 | tipc_printf(buf, "REROUTED(%u):",msg_reroute_cnt(msg)); | |
239 | break; | |
240 | case LINK_PROTOCOL: | |
241 | tipc_printf(buf, "PROT:TIM(%u):",msg_timestamp(msg)); | |
242 | switch (msg_type(msg)) { | |
243 | case STATE_MSG: | |
244 | tipc_printf(buf, "STATE:"); | |
245 | 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)); | |
249 | break; | |
250 | case RESET_MSG: | |
251 | tipc_printf(buf, "RESET:"); | |
252 | if (msg_size(msg) != msg_hdr_sz(msg)) | |
253 | tipc_printf(buf, "BEAR:%s:",msg_data(msg)); | |
254 | break; | |
255 | case ACTIVATE_MSG: | |
256 | tipc_printf(buf, "ACTIVATE:"); | |
257 | break; | |
258 | default: | |
259 | tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); | |
260 | } | |
261 | tipc_printf(buf, "PLANE(%c):",msg_net_plane(msg)); | |
262 | tipc_printf(buf, "SESS(%u):",msg_session(msg)); | |
263 | 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:"); | |
272 | tipc_printf(buf, "EXP(%u)",msg_msgcnt(msg)); | |
273 | break; | |
274 | default: | |
275 | tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); | |
276 | } | |
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:"); | |
283 | tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); | |
284 | break; | |
285 | case LOCAL_ROUTING_TABLE: | |
286 | tipc_printf(buf, "LOCAL_TBL:"); | |
287 | tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); | |
288 | break; | |
289 | case SLAVE_ROUTING_TABLE: | |
290 | tipc_printf(buf, "DP_TBL:"); | |
291 | tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); | |
292 | break; | |
293 | case ROUTE_ADDITION: | |
294 | tipc_printf(buf, "ADD:"); | |
295 | tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); | |
296 | break; | |
297 | case ROUTE_REMOVAL: | |
298 | tipc_printf(buf, "REMOVE:"); | |
299 | tipc_printf(buf, "TO:%x:",msg_remote_node(msg)); | |
300 | break; | |
301 | default: | |
302 | tipc_printf(buf, "UNKNOWN TYPE:%x",msg_type(msg)); | |
303 | } | |
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: | |
315 | tipc_printf(buf, "UNKNOWN TYPE:%x:",msg_type(msg)); | |
316 | break; | |
317 | } | |
318 | break; | |
319 | default: | |
320 | tipc_printf(buf, "UNKNOWN USER:"); | |
321 | } | |
322 | ||
323 | switch (usr) { | |
324 | case CONN_MANAGER: | |
06d82c91 AS |
325 | case TIPC_LOW_IMPORTANCE: |
326 | case TIPC_MEDIUM_IMPORTANCE: | |
327 | case TIPC_HIGH_IMPORTANCE: | |
328 | case TIPC_CRITICAL_IMPORTANCE: | |
b97bf3fd PL |
329 | 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 | } | |
351 | default:{} | |
352 | } | |
353 | ||
354 | tipc_printf(buf, "HZ(%u):", msg_hdr_sz(msg)); | |
355 | tipc_printf(buf, "SZ(%u):", msg_size(msg)); | |
356 | tipc_printf(buf, "SQNO(%u):", msg_seqno(msg)); | |
357 | ||
358 | if (msg_non_seq(msg)) | |
359 | tipc_printf(buf, "NOSEQ:"); | |
360 | else { | |
361 | tipc_printf(buf, "ACK(%u):", msg_ack(msg)); | |
362 | } | |
363 | 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 | } | |
384 | if (msg_routed(msg) && !msg_non_seq(msg)) | |
385 | tipc_printf(buf, ":TSEQN(%u)", msg_transp_seqno(msg)); | |
386 | } | |
387 | if (msg_user(msg) == NAME_DISTRIBUTOR) { | |
388 | tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg)); | |
389 | tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg)); | |
390 | if (msg_routed(msg)) { | |
391 | tipc_printf(buf, ":CSEQN(%u)", msg_transp_seqno(msg)); | |
392 | } | |
393 | } | |
394 | ||
395 | if (msg_user(msg) == LINK_CONFIG) { | |
396 | u32* raw = (u32*)msg; | |
397 | struct tipc_media_addr* orig = (struct tipc_media_addr*)&raw[5]; | |
398 | tipc_printf(buf, ":REQL(%u):", msg_req_links(msg)); | |
399 | tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg)); | |
400 | tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg)); | |
4323add6 | 401 | tipc_media_addr_printf(buf, orig); |
b97bf3fd PL |
402 | } |
403 | if (msg_user(msg) == BCAST_PROTOCOL) { | |
404 | tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg)); | |
405 | tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg)); | |
406 | } | |
407 | tipc_printf(buf, "\n"); | |
408 | if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg))) { | |
48c97139 | 409 | tipc_msg_dbg(buf, msg_get_wrapped(msg), " /"); |
b97bf3fd PL |
410 | } |
411 | if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT)) { | |
48c97139 | 412 | tipc_msg_dbg(buf, msg_get_wrapped(msg), " /"); |
b97bf3fd PL |
413 | } |
414 | } | |
48c97139 AS |
415 | |
416 | #endif |