summaryrefslogtreecommitdiffstats
path: root/net/tipc/msg.c
blob: 03e57bf92c732b8d278fbf1bcfb0491b23f6ac34 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
/*
 * net/tipc/msg.c: TIPC message header routines
 *
 * Copyright (c) 2000-2006, Ericsson AB
 * Copyright (c) 2005, 2010-2011, Wind River Systems
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "core.h"
#include "msg.h"

u32 tipc_msg_tot_importance(struct tipc_msg *m)
{
	if (likely(msg_isdata(m))) {
		if (likely(msg_orignode(m) == tipc_own_addr))
			return msg_importance(m);
		return msg_importance(m) + 4;
	}
	if ((msg_user(m) == MSG_FRAGMENTER)  &&
	    (msg_type(m) == FIRST_FRAGMENT))
		return msg_importance(msg_get_wrapped(m));
	return msg_importance(m);
}


void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type,
			    u32 hsize, u32 destnode)
{
	memset(m, 0, hsize);
	msg_set_version(m);
	msg_set_user(m, user);
	msg_set_hdr_sz(m, hsize);
	msg_set_size(m, hsize);
	msg_set_prevnode(m, tipc_own_addr);
	msg_set_type(m, type);
	if (!msg_short(m)) {
		msg_set_orignode(m, tipc_own_addr);
		msg_set_destnode(m, destnode);
	}
}

/**
 * tipc_msg_build - create message using specified header and data
 *
 * Note: Caller must not hold any locks in case copy_from_user() is interrupted!
 *
 * Returns message data size or errno
 */

int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
		   u32 num_sect, unsigned int total_len,
			    int max_size, int usrmem, struct sk_buff **buf)
{
	int dsz, sz, hsz, pos, res, cnt;

	dsz = total_len;
	pos = hsz = msg_hdr_sz(hdr);
	sz = hsz + dsz;
	msg_set_size(hdr, sz);
	if (unlikely(sz > max_size)) {
		*buf = NULL;
		return dsz;
	}

	*buf = tipc_buf_acquire(sz);
	if (!(*buf))
		return -ENOMEM;
	skb_copy_to_linear_data(*buf, hdr, hsz);
	for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) {
		if (likely(usrmem))
			res = !copy_from_user((*buf)->data + pos,
					      msg_sect[cnt].iov_base,
					      msg_sect[cnt].iov_len);
		else
			skb_copy_to_linear_data_offset(*buf, pos,
						       msg_sect[cnt].iov_base,
						       msg_sect[cnt].iov_len);
		pos += msg_sect[cnt].iov_len;
	}
	if (likely(res))
		return dsz;

	buf_discard(*buf);
	*buf = NULL;
	return -EFAULT;
}

#ifdef CONFIG_TIPC_DEBUG

void tipc_msg_dbg(struct print_buf *buf, struct tipc_msg *msg, const char *str)
{
	u32 usr = msg_user(msg);
	tipc_printf(buf, KERN_DEBUG);
	tipc_printf(buf, str);

	switch (usr) {
	case MSG_BUNDLER:
		tipc_printf(buf, "BNDL::");
		tipc_printf(buf, "MSGS(%u):", msg_msgcnt(msg));
		break;
	case BCAST_PROTOCOL:
		tipc_printf(buf, "BCASTP::");
		break;
	case MSG_FRAGMENTER:
		tipc_printf(buf, "FRAGM::");
		switch (msg_type(msg)) {
		case FIRST_FRAGMENT:
			tipc_printf(buf, "FIRST:");
			break;
		case FRAGMENT:
			tipc_printf(buf, "BODY:");
			break;
		case LAST_FRAGMENT:
			tipc_printf(buf, "LAST:");
			break;
		default:
			tipc_printf(buf, "UNKNOWN:%x", msg_type(msg));

		}
		tipc_printf(buf, "NO(%u/%u):", msg_long_msgno(msg),
			    msg_fragm_no(msg));
		break;
	case TIPC_LOW_IMPORTANCE:
	case TIPC_MEDIUM_IMPORTANCE:
	case TIPC_HIGH_IMPORTANCE:
	case TIPC_CRITICAL_IMPORTANCE:
		tipc_printf(buf, "DAT%u:", msg_user(msg));
		if (msg_short(msg)) {
			tipc_printf(buf, "CON:");
			break;
		}
		switch (msg_type(msg)) {
		case TIPC_CONN_MSG:
			tipc_printf(buf, "CON:");
			break;
		case TIPC_MCAST_MSG:
			tipc_printf(buf, "MCST:");
			break;
		case TIPC_NAMED_MSG:
			tipc_printf(buf, "NAM:");
			break;
		case TIPC_DIRECT_MSG:
			tipc_printf(buf, "DIR:");
			break;
		default:
			tipc_printf(buf, "UNKNOWN TYPE %u", msg_type(msg));
		}
		if (msg_reroute_cnt(msg))
			tipc_printf(buf, "REROUTED(%u):",
				    msg_reroute_cnt(msg));
		break;
	case NAME_DISTRIBUTOR:
		tipc_printf(buf, "NMD::");
		switch (msg_type(msg)) {
		case PUBLICATION:
			tipc_printf(buf, "PUBL(%u):", (msg_size(msg) - msg_hdr_sz(msg)) / 20);	/* Items */
			break;
		case WITHDRAWAL:
			tipc_printf(buf, "WDRW:");
			break;
		default:
			tipc_printf(buf, "UNKNOWN:%x", msg_type(msg));
		}
		if (msg_reroute_cnt(msg))
			tipc_printf(buf, "REROUTED(%u):",
				    msg_reroute_cnt(msg));
		break;
	case CONN_MANAGER:
		tipc_printf(buf, "CONN_MNG:");
		switch (msg_type(msg)) {
		case CONN_PROBE:
			tipc_printf(buf, "PROBE:");
			break;
		case CONN_PROBE_REPLY:
			tipc_printf(buf, "PROBE_REPLY:");
			break;
		case CONN_ACK:
			tipc_printf(buf, "CONN_ACK:");
			tipc_printf(buf, "ACK(%u):", msg_msgcnt(msg));
			break;
		default:
			tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
		}
		if (msg_reroute_cnt(msg))
			tipc_printf(buf, "REROUTED(%u):", msg_reroute_cnt(msg));
		break;
	case LINK_PROTOCOL:
		switch (msg_type(msg)) {
		case STATE_MSG:
			tipc_printf(buf, "STATE:");
			tipc_printf(buf, "%s:", msg_probe(msg) ? "PRB" : "");
			tipc_printf(buf, "NXS(%u):", msg_next_sent(msg));
			tipc_printf(buf, "GAP(%u):", msg_seq_gap(msg));
			tipc_printf(buf, "LSTBC(%u):", msg_last_bcast(msg));
			break;
		case RESET_MSG:
			tipc_printf(buf, "RESET:");
			if (msg_size(msg) != msg_hdr_sz(msg))
				tipc_printf(buf, "BEAR:%s:", msg_data(msg));
			break;
		case ACTIVATE_MSG:
			tipc_printf(buf, "ACTIVATE:");
			break;
		default:
			tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
		}
		tipc_printf(buf, "PLANE(%c):", msg_net_plane(msg));
		tipc_printf(buf, "SESS(%u):", msg_session(msg));
		break;
	case CHANGEOVER_PROTOCOL:
		tipc_printf(buf, "TUNL:");
		switch (msg_type(msg)) {
		case DUPLICATE_MSG:
			tipc_printf(buf, "DUPL:");
			break;
		case ORIGINAL_MSG:
			tipc_printf(buf, "ORIG:");
			tipc_printf(buf, "EXP(%u)", msg_msgcnt(msg));
			break;
		default:
			tipc_printf(buf, "UNKNOWN TYPE:%x", msg_type(msg));
		}
		break;
	case LINK_CONFIG:
		tipc_printf(buf, "CFG:");
		switch (msg_type(msg)) {
		case DSC_REQ_MSG:
			tipc_printf(buf, "DSC_REQ:");
			break;
		case DSC_RESP_MSG:
			tipc_printf(buf, "DSC_RESP:");
			break;
		default:
			tipc_printf(buf, "UNKNOWN TYPE:%x:", msg_type(msg));
			break;
		}
		break;
	default:
		tipc_printf(buf, "UNKNOWN USER:");
	}

	switch (usr) {
	case CONN_MANAGER:
	case TIPC_LOW_IMPORTANCE:
	case TIPC_MEDIUM_IMPORTANCE:
	case TIPC_HIGH_IMPORTANCE:
	case TIPC_CRITICAL_IMPORTANCE:
		switch (msg_errcode(msg)) {
		case TIPC_OK:
			break;
		case TIPC_ERR_NO_NAME:
			tipc_printf(buf, "NO_NAME:");
			break;
		case TIPC_ERR_NO_PORT:
			tipc_printf(buf, "NO_PORT:");
			break;
		case TIPC_ERR_NO_NODE:
			tipc_printf(buf, "NO_PROC:");
			break;
		case TIPC_ERR_OVERLOAD:
			tipc_printf(buf, "OVERLOAD:");
			break;
		case TIPC_CONN_SHUTDOWN:
			tipc_printf(buf, "SHUTDOWN:");
			break;
		default:
			tipc_printf(buf, "UNKNOWN ERROR(%x):",
				    msg_errcode(msg));
		}
	default:
		break;
	}

	tipc_printf(buf, "HZ(%u):", msg_hdr_sz(msg));
	tipc_printf(buf, "SZ(%u):", msg_size(msg));
	tipc_printf(buf, "SQNO(%u):", msg_seqno(msg));

	if (msg_non_seq(msg))
		tipc_printf(buf, "NOSEQ:");
	else
		tipc_printf(buf, "ACK(%u):", msg_ack(msg));
	tipc_printf(buf, "BACK(%u):", msg_bcast_ack(msg));
	tipc_printf(buf, "PRND(%x)", msg_prevnode(msg));

	if (msg_isdata(msg)) {
		if (msg_named(msg)) {
			tipc_printf(buf, "NTYP(%u):", msg_nametype(msg));
			tipc_printf(buf, "NINST(%u)", msg_nameinst(msg));
		}
	}

	if ((usr != LINK_PROTOCOL) && (usr != LINK_CONFIG) &&
	    (usr != MSG_BUNDLER)) {
		if (!msg_short(msg)) {
			tipc_printf(buf, ":ORIG(%x:%u):",
				    msg_orignode(msg), msg_origport(msg));
			tipc_printf(buf, ":DEST(%x:%u):",
				    msg_destnode(msg), msg_destport(msg));
		} else {
			tipc_printf(buf, ":OPRT(%u):", msg_origport(msg));
			tipc_printf(buf, ":DPRT(%u):", msg_destport(msg));
		}
	}
	if (msg_user(msg) == NAME_DISTRIBUTOR) {
		tipc_printf(buf, ":ONOD(%x):", msg_orignode(msg));
		tipc_printf(buf, ":DNOD(%x):", msg_destnode(msg));
	}

	if (msg_user(msg) ==  LINK_CONFIG) {
		u32 *raw = (u32 *)msg;
		struct tipc_media_addr *orig = (struct tipc_media_addr *)&raw[5];
		tipc_printf(buf, ":DDOM(%x):", msg_dest_domain(msg));
		tipc_printf(buf, ":NETID(%u):", msg_bc_netid(msg));
		tipc_media_addr_printf(buf, orig);
	}
	if (msg_user(msg) == BCAST_PROTOCOL) {
		tipc_printf(buf, "BCNACK:AFTER(%u):", msg_bcgap_after(msg));
		tipc_printf(buf, "TO(%u):", msg_bcgap_to(msg));
	}
	tipc_printf(buf, "\n");
	if ((usr == CHANGEOVER_PROTOCOL) && (msg_msgcnt(msg)))
		tipc_msg_dbg(buf, msg_get_wrapped(msg), "      /");
	if ((usr == MSG_FRAGMENTER) && (msg_type(msg) == FIRST_FRAGMENT))
		tipc_msg_dbg(buf, msg_get_wrapped(msg), "      /");
}

#endif
OpenPOWER on IntegriCloud