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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 |
741de3e9 | 5 | * Copyright (c) 2005, 2010-2011, 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, | |
0e65967e | 94 | int max_size, int usrmem, struct sk_buff **buf) |
23461e83 AS |
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: | |
0e65967e | 164 | tipc_printf(buf, "UNKNOWN:%x", msg_type(msg)); |
b97bf3fd PL |
165 | |
166 | } | |
0e65967e | 167 | tipc_printf(buf, "NO(%u/%u):", msg_long_msgno(msg), |
b97bf3fd PL |
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: | |
0e65967e | 193 | tipc_printf(buf, "UNKNOWN TYPE %u", msg_type(msg)); |
b97bf3fd | 194 | } |
b97bf3fd PL |
195 | if (msg_reroute_cnt(msg)) |
196 | tipc_printf(buf, "REROUTED(%u):", | |
197 | msg_reroute_cnt(msg)); | |
198 | break; | |
199 | case NAME_DISTRIBUTOR: | |
200 | tipc_printf(buf, "NMD::"); | |
201 | switch (msg_type(msg)) { | |
202 | case PUBLICATION: | |
203 | tipc_printf(buf, "PUBL(%u):", (msg_size(msg) - msg_hdr_sz(msg)) / 20); /* Items */ | |
204 | break; | |
205 | case WITHDRAWAL: | |
206 | tipc_printf(buf, "WDRW:"); | |
207 | break; | |
208 | default: | |
0e65967e | 209 | tipc_printf(buf, "UNKNOWN:%x", msg_type(msg)); |
b97bf3fd | 210 | } |
b97bf3fd PL |
211 | if (msg_reroute_cnt(msg)) |
212 | tipc_printf(buf, "REROUTED(%u):", | |
213 | msg_reroute_cnt(msg)); | |
214 | break; | |
215 | case CONN_MANAGER: | |
216 | tipc_printf(buf, "CONN_MNG:"); | |
217 | switch (msg_type(msg)) { | |
218 | case CONN_PROBE: | |
219 | tipc_printf(buf, "PROBE:"); | |
220 | break; | |
221 | case CONN_PROBE_REPLY: | |
222 | tipc_printf(buf, "PROBE_REPLY:"); | |
223 | break; | |
224 | case CONN_ACK: | |
225 | tipc_printf(buf, "CONN_ACK:"); | |
0e65967e | 226 | tipc_printf(buf, "ACK(%u):", msg_msgcnt(msg)); |
b97bf3fd PL |
227 | break; |
228 | default: | |
0e65967e | 229 | tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg)); |
b97bf3fd | 230 | } |
b97bf3fd | 231 | if (msg_reroute_cnt(msg)) |
0e65967e | 232 | tipc_printf(buf, "REROUTED(%u):", msg_reroute_cnt(msg)); |
b97bf3fd PL |
233 | break; |
234 | case LINK_PROTOCOL: | |
b97bf3fd PL |
235 | switch (msg_type(msg)) { |
236 | case STATE_MSG: | |
237 | tipc_printf(buf, "STATE:"); | |
0e65967e AS |
238 | tipc_printf(buf, "%s:", msg_probe(msg) ? "PRB" : ""); |
239 | tipc_printf(buf, "NXS(%u):", msg_next_sent(msg)); | |
240 | tipc_printf(buf, "GAP(%u):", msg_seq_gap(msg)); | |
241 | tipc_printf(buf, "LSTBC(%u):", msg_last_bcast(msg)); | |
b97bf3fd PL |
242 | break; |
243 | case RESET_MSG: | |
244 | tipc_printf(buf, "RESET:"); | |
245 | if (msg_size(msg) != msg_hdr_sz(msg)) | |
0e65967e | 246 | tipc_printf(buf, "BEAR:%s:", msg_data(msg)); |
b97bf3fd PL |
247 | break; |
248 | case ACTIVATE_MSG: | |
249 | tipc_printf(buf, "ACTIVATE:"); | |
250 | break; | |
251 | default: | |
0e65967e | 252 | tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg)); |
b97bf3fd | 253 | } |
0e65967e AS |
254 | tipc_printf(buf, "PLANE(%c):", msg_net_plane(msg)); |
255 | tipc_printf(buf, "SESS(%u):", msg_session(msg)); | |
b97bf3fd PL |
256 | break; |
257 | case CHANGEOVER_PROTOCOL: | |
258 | tipc_printf(buf, "TUNL:"); | |
259 | switch (msg_type(msg)) { | |
260 | case DUPLICATE_MSG: | |
261 | tipc_printf(buf, "DUPL:"); | |
262 | break; | |
263 | case ORIGINAL_MSG: | |
264 | tipc_printf(buf, "ORIG:"); | |
0e65967e | 265 | tipc_printf(buf, "EXP(%u)", msg_msgcnt(msg)); |
b97bf3fd PL |
266 | break; |
267 | default: | |
0e65967e | 268 | tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg)); |
b97bf3fd PL |
269 | } |
270 | break; | |
b97bf3fd PL |
271 | case LINK_CONFIG: |
272 | tipc_printf(buf, "CFG:"); | |
273 | switch (msg_type(msg)) { | |
274 | case DSC_REQ_MSG: | |
275 | tipc_printf(buf, "DSC_REQ:"); | |
276 | break; | |
277 | case DSC_RESP_MSG: | |
278 | tipc_printf(buf, "DSC_RESP:"); | |
279 | break; | |
280 | default: | |
0e65967e | 281 | tipc_printf(buf, "UNKNOWN TYPE:%x:", msg_type(msg)); |
b97bf3fd PL |
282 | break; |
283 | } | |
284 | break; | |
285 | default: | |
286 | tipc_printf(buf, "UNKNOWN USER:"); | |
287 | } | |
288 | ||
289 | switch (usr) { | |
290 | case CONN_MANAGER: | |
06d82c91 AS |
291 | case TIPC_LOW_IMPORTANCE: |
292 | case TIPC_MEDIUM_IMPORTANCE: | |
293 | case TIPC_HIGH_IMPORTANCE: | |
294 | case TIPC_CRITICAL_IMPORTANCE: | |
b97bf3fd PL |
295 | switch (msg_errcode(msg)) { |
296 | case TIPC_OK: | |
297 | break; | |
298 | case TIPC_ERR_NO_NAME: | |
299 | tipc_printf(buf, "NO_NAME:"); | |
300 | break; | |
301 | case TIPC_ERR_NO_PORT: | |
302 | tipc_printf(buf, "NO_PORT:"); | |
303 | break; | |
304 | case TIPC_ERR_NO_NODE: | |
305 | tipc_printf(buf, "NO_PROC:"); | |
306 | break; | |
307 | case TIPC_ERR_OVERLOAD: | |
308 | tipc_printf(buf, "OVERLOAD:"); | |
309 | break; | |
310 | case TIPC_CONN_SHUTDOWN: | |
311 | tipc_printf(buf, "SHUTDOWN:"); | |
312 | break; | |
313 | default: | |
314 | tipc_printf(buf, "UNKNOWN ERROR(%x):", | |
315 | msg_errcode(msg)); | |
316 | } | |
a016892c AS |
317 | default: |
318 | break; | |
b97bf3fd PL |
319 | } |
320 | ||
321 | tipc_printf(buf, "HZ(%u):", msg_hdr_sz(msg)); | |
322 | tipc_printf(buf, "SZ(%u):", msg_size(msg)); | |
323 | tipc_printf(buf, "SQNO(%u):", msg_seqno(msg)); | |
324 | ||
325 | if (msg_non_seq(msg)) | |
326 | tipc_printf(buf, "NOSEQ:"); | |
a016892c | 327 | else |
b97bf3fd | 328 | tipc_printf(buf, "ACK(%u):", msg_ack(msg)); |
b97bf3fd PL |
329 | tipc_printf(buf, "BACK(%u):", msg_bcast_ack(msg)); |
330 | tipc_printf(buf, "PRND(%x)", msg_prevnode(msg)); | |
331 | ||
332 | if (msg_isdata(msg)) { | |
333 | if (msg_named(msg)) { | |
334 | tipc_printf(buf, "NTYP(%u):", msg_nametype(msg)); | |
335 | tipc_printf(buf, "NINST(%u)", msg_nameinst(msg)); | |
336 | } | |
337 | } | |
338 | ||
339 | if ((usr != LINK_PROTOCOL) && (usr != LINK_CONFIG) && | |
340 | (usr != MSG_BUNDLER)) { | |
341 | if (!msg_short(msg)) { | |
342 | tipc_printf(buf, ":ORIG(%x:%u):", | |
343 | msg_orignode(msg), msg_origport(msg)); | |
344 | tipc_printf(buf, ":DEST(%x:%u):", | |
345 | msg_destnode(msg), msg_destport(msg)); | |
346 | } else { | |
347 | tipc_printf(buf, ":OPRT(%u):", msg_origport(msg)); | |
348 | tipc_printf(buf, ":DPRT(%u):", msg_destport(msg)); | |
349 | } | |
b97bf3fd PL |
350 | } |
351 | if (msg_user(msg) == NAME_DISTRIBUTOR) { | |
352 | tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg)); | |
353 | tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg)); | |
b97bf3fd PL |
354 | } |
355 | ||
356 | if (msg_user(msg) == LINK_CONFIG) { | |
0e65967e AS |
357 | u32 *raw = (u32 *)msg; |
358 | struct tipc_media_addr *orig = (struct tipc_media_addr *)&raw[5]; | |
b97bf3fd PL |
359 | tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg)); |
360 | tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg)); | |
4323add6 | 361 | tipc_media_addr_printf(buf, orig); |
b97bf3fd PL |
362 | } |
363 | if (msg_user(msg) == BCAST_PROTOCOL) { | |
364 | tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg)); | |
365 | tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg)); | |
366 | } | |
367 | tipc_printf(buf, "\n"); | |
a016892c | 368 | if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg))) |
48c97139 | 369 | tipc_msg_dbg(buf, msg_get_wrapped(msg), " /"); |
a016892c | 370 | if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT)) |
48c97139 | 371 | tipc_msg_dbg(buf, msg_get_wrapped(msg), " /"); |
b97bf3fd | 372 | } |
48c97139 AS |
373 | |
374 | #endif |