1 /*
2 * Copyright (c) 2014, Ericsson AB
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the names of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * Alternatively, this software may be distributed under the terms of the
18 * GNU General Public License ("GPL") version 2 as published by the Free
19 * Software Foundation.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include "core.h"
35 #include "bearer.h"
36 #include "link.h"
37 #include "name_table.h"
38 #include "socket.h"
39 #include "node.h"
40 #include "net.h"
41 #include <net/genetlink.h>
42 #include <linux/tipc_config.h>
43
44 /* The legacy API had an artificial message length limit called
45 * ULTRA_STRING_MAX_LEN.
46 */
47 #define ULTRA_STRING_MAX_LEN 32768
48
49 #define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN)
50
51 #define REPLY_TRUNCATED "<truncated>\n"
52
53 struct tipc_nl_compat_msg {
54 u16 cmd;
55 int rep_type;
56 int rep_size;
57 int req_type;
58 int req_size;
59 struct net *net;
60 struct sk_buff *rep;
61 struct tlv_desc *req;
62 struct sock *dst_sk;
63 };
64
65 struct tipc_nl_compat_cmd_dump {
66 int (*header)(struct tipc_nl_compat_msg *);
67 int (*dumpit)(struct sk_buff *, struct netlink_callback *);
68 int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
69 };
70
71 struct tipc_nl_compat_cmd_doit {
72 int (*doit)(struct sk_buff *skb, struct genl_info *info);
73 int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd,
74 struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
75 };
76
77 static int tipc_skb_tailroom(struct sk_buff *skb)
78 {
79 int tailroom;
80 int limit;
81
82 tailroom = skb_tailroom(skb);
83 limit = TIPC_SKB_MAX - skb->len;
84
85 if (tailroom < limit)
86 return tailroom;
87
88 return limit;
89 }
90
91 static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv)
92 {
93 return TLV_GET_LEN(tlv) - TLV_SPACE(0);
94 }
95
96 static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len)
97 {
98 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb);
99
100 if (tipc_skb_tailroom(skb) < TLV_SPACE(len))
101 return -EMSGSIZE;
102
103 skb_put(skb, TLV_SPACE(len));
104 tlv->tlv_type = htons(type);
105 tlv->tlv_len = htons(TLV_LENGTH(len));
106 if (len && data)
107 memcpy(TLV_DATA(tlv), data, len);
108
109 return 0;
110 }
111
112 static void tipc_tlv_init(struct sk_buff *skb, u16 type)
113 {
114 struct tlv_desc *tlv = (struct tlv_desc *)skb->data;
115
116 TLV_SET_LEN(tlv, 0);
117 TLV_SET_TYPE(tlv, type);
118 skb_put(skb, sizeof(struct tlv_desc));
119 }
120
121 static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...)
122 {
123 int n;
124 u16 len;
125 u32 rem;
126 char *buf;
127 struct tlv_desc *tlv;
128 va_list args;
129
130 rem = tipc_skb_tailroom(skb);
131
132 tlv = (struct tlv_desc *)skb->data;
133 len = TLV_GET_LEN(tlv);
134 buf = TLV_DATA(tlv) + len;
135
136 va_start(args, fmt);
137 n = vscnprintf(buf, rem, fmt, args);
138 va_end(args);
139
140 TLV_SET_LEN(tlv, n + len);
141 skb_put(skb, n);
142
143 return n;
144 }
145
146 static struct sk_buff *tipc_tlv_alloc(int size)
147 {
148 int hdr_len;
149 struct sk_buff *buf;
150
151 size = TLV_SPACE(size);
152 hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
153
154 buf = alloc_skb(hdr_len + size, GFP_KERNEL);
155 if (!buf)
156 return NULL;
157
158 skb_reserve(buf, hdr_len);
159
160 return buf;
161 }
162
163 static struct sk_buff *tipc_get_err_tlv(char *str)
164 {
165 int str_len = strlen(str) + 1;
166 struct sk_buff *buf;
167
168 buf = tipc_tlv_alloc(TLV_SPACE(str_len));
169 if (buf)
170 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
171
172 return buf;
173 }
174
175 static inline bool string_is_valid(char *s, int len)
176 {
177 return memchr(s, '\0', len) ? true : false;
178 }
179
180 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
181 struct tipc_nl_compat_msg *msg,
182 struct sk_buff *arg)
183 {
184 int len = 0;
185 int err;
186 struct sk_buff *buf;
187 struct nlmsghdr *nlmsg;
188 struct netlink_callback cb;
189
190 memset(&cb, 0, sizeof(cb));
191 cb.nlh = (struct nlmsghdr *)arg->data;
192 cb.skb = arg;
193
194 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
195 if (!buf)
196 return -ENOMEM;
197
198 buf->sk = msg->dst_sk;
199
200 do {
201 int rem;
202
203 len = (*cmd->dumpit)(buf, &cb);
204
205 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
206 struct nlattr **attrs;
207
208 err = tipc_nlmsg_parse(nlmsg, &attrs);
209 if (err)
210 goto err_out;
211
212 err = (*cmd->format)(msg, attrs);
213 if (err)
214 goto err_out;
215
216 if (tipc_skb_tailroom(msg->rep) <= 1) {
217 err = -EMSGSIZE;
218 goto err_out;
219 }
220 }
221
222 skb_reset_tail_pointer(buf);
223 buf->len = 0;
224
225 } while (len);
226
227 err = 0;
228
229 err_out:
230 kfree_skb(buf);
231
232 if (err == -EMSGSIZE) {
233 /* The legacy API only considered messages filling
234 * "ULTRA_STRING_MAX_LEN" to be truncated.
235 */
236 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
237 char *tail = skb_tail_pointer(msg->rep);
238
239 if (*tail != '\0')
240 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
241 REPLY_TRUNCATED);
242 }
243
244 return 0;
245 }
246
247 return err;
248 }
249
250 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
251 struct tipc_nl_compat_msg *msg)
252 {
253 struct nlmsghdr *nlh;
254 struct sk_buff *arg;
255 int err;
256
257 if (msg->req_type && (!msg->req_size ||
258 !TLV_CHECK_TYPE(msg->req, msg->req_type)))
259 return -EINVAL;
260
261 msg->rep = tipc_tlv_alloc(msg->rep_size);
262 if (!msg->rep)
263 return -ENOMEM;
264
265 if (msg->rep_type)
266 tipc_tlv_init(msg->rep, msg->rep_type);
267
268 if (cmd->header) {
269 err = (*cmd->header)(msg);
270 if (err) {
271 kfree_skb(msg->rep);
272 msg->rep = NULL;
273 return err;
274 }
275 }
276
277 arg = nlmsg_new(0, GFP_KERNEL);
278 if (!arg) {
279 kfree_skb(msg->rep);
280 msg->rep = NULL;
281 return -ENOMEM;
282 }
283
284 nlh = nlmsg_put(arg, 0, 0, tipc_genl_family.id, 0, NLM_F_MULTI);
285 if (!nlh) {
286 kfree_skb(arg);
287 kfree_skb(msg->rep);
288 msg->rep = NULL;
289 return -EMSGSIZE;
290 }
291 nlmsg_end(arg, nlh);
292
293 err = __tipc_nl_compat_dumpit(cmd, msg, arg);
294 if (err) {
295 kfree_skb(msg->rep);
296 msg->rep = NULL;
297 }
298 kfree_skb(arg);
299
300 return err;
301 }
302
303 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
304 struct tipc_nl_compat_msg *msg)
305 {
306 int err;
307 struct sk_buff *doit_buf;
308 struct sk_buff *trans_buf;
309 struct nlattr **attrbuf;
310 struct genl_info info;
311
312 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
313 if (!trans_buf)
314 return -ENOMEM;
315
316 err = (*cmd->transcode)(cmd, trans_buf, msg);
317 if (err)
318 goto trans_out;
319
320 attrbuf = kmalloc((tipc_genl_family.maxattr + 1) *
321 sizeof(struct nlattr *), GFP_KERNEL);
322 if (!attrbuf) {
323 err = -ENOMEM;
324 goto trans_out;
325 }
326
327 err = nla_parse(attrbuf, tipc_genl_family.maxattr,
328 (const struct nlattr *)trans_buf->data,
329 trans_buf->len, NULL);
330 if (err)
331 goto parse_out;
332
333 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
334 if (!doit_buf) {
335 err = -ENOMEM;
336 goto parse_out;
337 }
338
339 doit_buf->sk = msg->dst_sk;
340
341 memset(&info, 0, sizeof(info));
342 info.attrs = attrbuf;
343
344 err = (*cmd->doit)(doit_buf, &info);
345
346 kfree_skb(doit_buf);
347 parse_out:
348 kfree(attrbuf);
349 trans_out:
350 kfree_skb(trans_buf);
351
352 return err;
353 }
354
355 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
356 struct tipc_nl_compat_msg *msg)
357 {
358 int err;
359
360 if (msg->req_type && (!msg->req_size ||
361 !TLV_CHECK_TYPE(msg->req, msg->req_type)))
362 return -EINVAL;
363
364 err = __tipc_nl_compat_doit(cmd, msg);
365 if (err)
366 return err;
367
368 /* The legacy API considered an empty message a success message */
369 msg->rep = tipc_tlv_alloc(0);
370 if (!msg->rep)
371 return -ENOMEM;
372
373 return 0;
374 }
375
376 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
377 struct nlattr **attrs)
378 {
379 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
380
381 nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, attrs[TIPC_NLA_BEARER],
382 NULL);
383
384 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
385 nla_data(bearer[TIPC_NLA_BEARER_NAME]),
386 nla_len(bearer[TIPC_NLA_BEARER_NAME]));
387 }
388
389 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
390 struct sk_buff *skb,
391 struct tipc_nl_compat_msg *msg)
392 {
393 struct nlattr *prop;
394 struct nlattr *bearer;
395 struct tipc_bearer_config *b;
396 int len;
397
398 b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
399
400 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
401 if (!bearer)
402 return -EMSGSIZE;
403
404 len = TLV_GET_DATA_LEN(msg->req);
405 len -= offsetof(struct tipc_bearer_config, name);
406 if (len <= 0)
407 return -EINVAL;
408
409 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
410 if (!string_is_valid(b->name, len))
411 return -EINVAL;
412
413 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
414 return -EMSGSIZE;
415
416 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
417 return -EMSGSIZE;
418
419 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
420 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
421 if (!prop)
422 return -EMSGSIZE;
423 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
424 return -EMSGSIZE;
425 nla_nest_end(skb, prop);
426 }
427 nla_nest_end(skb, bearer);
428
429 return 0;
430 }
431
432 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
433 struct sk_buff *skb,
434 struct tipc_nl_compat_msg *msg)
435 {
436 char *name;
437 struct nlattr *bearer;
438 int len;
439
440 name = (char *)TLV_DATA(msg->req);
441
442 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
443 if (!bearer)
444 return -EMSGSIZE;
445
446 len = TLV_GET_DATA_LEN(msg->req);
447 if (len <= 0)
448 return -EINVAL;
449
450 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
451 if (!string_is_valid(name, len))
452 return -EINVAL;
453
454 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
455 return -EMSGSIZE;
456
457 nla_nest_end(skb, bearer);
458
459 return 0;
460 }
461
462 static inline u32 perc(u32 count, u32 total)
463 {
464 return (count * 100 + (total / 2)) / total;
465 }
466
467 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
468 struct nlattr *prop[], struct nlattr *stats[])
469 {
470 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
471 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
472
473 tipc_tlv_sprintf(msg->rep,
474 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
475 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
476 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
477 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
478 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
479 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
480
481 tipc_tlv_sprintf(msg->rep,
482 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
483 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
484 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
485 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
486 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
487 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
488
489 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
490 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
491 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
492 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
493
494 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
495 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
496 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
497 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
498
499 tipc_tlv_sprintf(msg->rep,
500 " Congestion link:%u Send queue max:%u avg:%u",
501 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
502 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
503 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
504 }
505
506 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
507 struct nlattr **attrs)
508 {
509 char *name;
510 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
511 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
512 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
513 int len;
514
515 nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
516
517 nla_parse_nested(prop, TIPC_NLA_PROP_MAX, link[TIPC_NLA_LINK_PROP],
518 NULL);
519
520 nla_parse_nested(stats, TIPC_NLA_STATS_MAX, link[TIPC_NLA_LINK_STATS],
521 NULL);
522
523 name = (char *)TLV_DATA(msg->req);
524
525 len = TLV_GET_DATA_LEN(msg->req);
526 if (len <= 0)
527 return -EINVAL;
528
529 len = min_t(int, len, TIPC_MAX_LINK_NAME);
530 if (!string_is_valid(name, len))
531 return -EINVAL;
532
533 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
534 return 0;
535
536 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
537 nla_data(link[TIPC_NLA_LINK_NAME]));
538
539 if (link[TIPC_NLA_LINK_BROADCAST]) {
540 __fill_bc_link_stat(msg, prop, stats);
541 return 0;
542 }
543
544 if (link[TIPC_NLA_LINK_ACTIVE])
545 tipc_tlv_sprintf(msg->rep, " ACTIVE");
546 else if (link[TIPC_NLA_LINK_UP])
547 tipc_tlv_sprintf(msg->rep, " STANDBY");
548 else
549 tipc_tlv_sprintf(msg->rep, " DEFUNCT");
550
551 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
552 nla_get_u32(link[TIPC_NLA_LINK_MTU]),
553 nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
554
555 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
556 nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
557 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
558
559 tipc_tlv_sprintf(msg->rep,
560 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
561 nla_get_u32(link[TIPC_NLA_LINK_RX]) -
562 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
563 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
564 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
565 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
566 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
567
568 tipc_tlv_sprintf(msg->rep,
569 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
570 nla_get_u32(link[TIPC_NLA_LINK_TX]) -
571 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
572 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
573 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
574 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
575 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
576
577 tipc_tlv_sprintf(msg->rep,
578 " TX profile sample:%u packets average:%u octets\n",
579 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
580 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
581 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
582
583 tipc_tlv_sprintf(msg->rep,
584 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
585 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
586 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
587 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
588 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
589 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
590 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
591 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
592 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
593
594 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
595 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
596 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
597 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
598 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
599 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
600 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
601
602 tipc_tlv_sprintf(msg->rep,
603 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
604 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
605 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
606 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
607 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
608 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
609
610 tipc_tlv_sprintf(msg->rep,
611 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
612 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
613 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
614 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
615 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
616 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
617
618 tipc_tlv_sprintf(msg->rep,
619 " Congestion link:%u Send queue max:%u avg:%u",
620 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
621 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
622 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
623
624 return 0;
625 }
626
627 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
628 struct nlattr **attrs)
629 {
630 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
631 struct tipc_link_info link_info;
632
633 nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
634
635 link_info.dest = htonl(nla_get_flag(link[TIPC_NLA_LINK_DEST]));
636 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
637 nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME],
638 TIPC_MAX_LINK_NAME);
639
640 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
641 &link_info, sizeof(link_info));
642 }
643
644 static int __tipc_add_link_prop(struct sk_buff *skb,
645 struct tipc_nl_compat_msg *msg,
646 struct tipc_link_config *lc)
647 {
648 switch (msg->cmd) {
649 case TIPC_CMD_SET_LINK_PRI:
650 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
651 case TIPC_CMD_SET_LINK_TOL:
652 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
653 case TIPC_CMD_SET_LINK_WINDOW:
654 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
655 }
656
657 return -EINVAL;
658 }
659
660 static int tipc_nl_compat_media_set(struct sk_buff *skb,
661 struct tipc_nl_compat_msg *msg)
662 {
663 struct nlattr *prop;
664 struct nlattr *media;
665 struct tipc_link_config *lc;
666 int len;
667
668 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
669
670 media = nla_nest_start(skb, TIPC_NLA_MEDIA);
671 if (!media)
672 return -EMSGSIZE;
673
674 len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME);
675 if (!string_is_valid(lc->name, len))
676 return -EINVAL;
677
678 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
679 return -EMSGSIZE;
680
681 prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP);
682 if (!prop)
683 return -EMSGSIZE;
684
685 __tipc_add_link_prop(skb, msg, lc);
686 nla_nest_end(skb, prop);
687 nla_nest_end(skb, media);
688
689 return 0;
690 }
691
692 static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
693 struct tipc_nl_compat_msg *msg)
694 {
695 struct nlattr *prop;
696 struct nlattr *bearer;
697 struct tipc_link_config *lc;
698 int len;
699
700 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
701
702 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
703 if (!bearer)
704 return -EMSGSIZE;
705
706 len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME);
707 if (!string_is_valid(lc->name, len))
708 return -EINVAL;
709
710 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
711 return -EMSGSIZE;
712
713 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
714 if (!prop)
715 return -EMSGSIZE;
716
717 __tipc_add_link_prop(skb, msg, lc);
718 nla_nest_end(skb, prop);
719 nla_nest_end(skb, bearer);
720
721 return 0;
722 }
723
724 static int __tipc_nl_compat_link_set(struct sk_buff *skb,
725 struct tipc_nl_compat_msg *msg)
726 {
727 struct nlattr *prop;
728 struct nlattr *link;
729 struct tipc_link_config *lc;
730
731 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
732
733 link = nla_nest_start(skb, TIPC_NLA_LINK);
734 if (!link)
735 return -EMSGSIZE;
736
737 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
738 return -EMSGSIZE;
739
740 prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP);
741 if (!prop)
742 return -EMSGSIZE;
743
744 __tipc_add_link_prop(skb, msg, lc);
745 nla_nest_end(skb, prop);
746 nla_nest_end(skb, link);
747
748 return 0;
749 }
750
751 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
752 struct sk_buff *skb,
753 struct tipc_nl_compat_msg *msg)
754 {
755 struct tipc_link_config *lc;
756 struct tipc_bearer *bearer;
757 struct tipc_media *media;
758 int len;
759
760 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
761
762 len = TLV_GET_DATA_LEN(msg->req);
763 len -= offsetof(struct tipc_link_config, name);
764 if (len <= 0)
765 return -EINVAL;
766
767 len = min_t(int, len, TIPC_MAX_LINK_NAME);
768 if (!string_is_valid(lc->name, len))
769 return -EINVAL;
770
771 media = tipc_media_find(lc->name);
772 if (media) {
773 cmd->doit = &tipc_nl_media_set;
774 return tipc_nl_compat_media_set(skb, msg);
775 }
776
777 bearer = tipc_bearer_find(msg->net, lc->name);
778 if (bearer) {
779 cmd->doit = &tipc_nl_bearer_set;
780 return tipc_nl_compat_bearer_set(skb, msg);
781 }
782
783 return __tipc_nl_compat_link_set(skb, msg);
784 }
785
786 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
787 struct sk_buff *skb,
788 struct tipc_nl_compat_msg *msg)
789 {
790 char *name;
791 struct nlattr *link;
792 int len;
793
794 name = (char *)TLV_DATA(msg->req);
795
796 link = nla_nest_start(skb, TIPC_NLA_LINK);
797 if (!link)
798 return -EMSGSIZE;
799
800 len = TLV_GET_DATA_LEN(msg->req);
801 if (len <= 0)
802 return -EINVAL;
803
804 len = min_t(int, len, TIPC_MAX_LINK_NAME);
805 if (!string_is_valid(name, len))
806 return -EINVAL;
807
808 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
809 return -EMSGSIZE;
810
811 nla_nest_end(skb, link);
812
813 return 0;
814 }
815
816 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
817 {
818 int i;
819 u32 depth;
820 struct tipc_name_table_query *ntq;
821 static const char * const header[] = {
822 "Type ",
823 "Lower Upper ",
824 "Port Identity ",
825 "Publication Scope"
826 };
827
828 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
829 if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query))
830 return -EINVAL;
831
832 depth = ntohl(ntq->depth);
833
834 if (depth > 4)
835 depth = 4;
836 for (i = 0; i < depth; i++)
837 tipc_tlv_sprintf(msg->rep, header[i]);
838 tipc_tlv_sprintf(msg->rep, "\n");
839
840 return 0;
841 }
842
843 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
844 struct nlattr **attrs)
845 {
846 char port_str[27];
847 struct tipc_name_table_query *ntq;
848 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
849 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
850 u32 node, depth, type, lowbound, upbound;
851 static const char * const scope_str[] = {"", " zone", " cluster",
852 " node"};
853
854 nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX,
855 attrs[TIPC_NLA_NAME_TABLE], NULL);
856
857 nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, nt[TIPC_NLA_NAME_TABLE_PUBL],
858 NULL);
859
860 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
861
862 depth = ntohl(ntq->depth);
863 type = ntohl(ntq->type);
864 lowbound = ntohl(ntq->lowbound);
865 upbound = ntohl(ntq->upbound);
866
867 if (!(depth & TIPC_NTQ_ALLTYPES) &&
868 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
869 return 0;
870 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
871 return 0;
872 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
873 return 0;
874
875 tipc_tlv_sprintf(msg->rep, "%-10u ",
876 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
877
878 if (depth == 1)
879 goto out;
880
881 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
882 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
883 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
884
885 if (depth == 2)
886 goto out;
887
888 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
889 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
890 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
891 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
892
893 if (depth == 3)
894 goto out;
895
896 tipc_tlv_sprintf(msg->rep, "%-10u %s",
897 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
898 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
899 out:
900 tipc_tlv_sprintf(msg->rep, "\n");
901
902 return 0;
903 }
904
905 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
906 struct nlattr **attrs)
907 {
908 u32 type, lower, upper;
909 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
910
911 nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL], NULL);
912
913 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
914 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
915 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
916
917 if (lower == upper)
918 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
919 else
920 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
921
922 return 0;
923 }
924
925 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
926 {
927 int err;
928 void *hdr;
929 struct nlattr *nest;
930 struct sk_buff *args;
931 struct tipc_nl_compat_cmd_dump dump;
932
933 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
934 if (!args)
935 return -ENOMEM;
936
937 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
938 TIPC_NL_PUBL_GET);
939 if (!hdr) {
940 kfree_skb(args);
941 return -EMSGSIZE;
942 }
943
944 nest = nla_nest_start(args, TIPC_NLA_SOCK);
945 if (!nest) {
946 kfree_skb(args);
947 return -EMSGSIZE;
948 }
949
950 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
951 kfree_skb(args);
952 return -EMSGSIZE;
953 }
954
955 nla_nest_end(args, nest);
956 genlmsg_end(args, hdr);
957
958 dump.dumpit = tipc_nl_publ_dump;
959 dump.format = __tipc_nl_compat_publ_dump;
960
961 err = __tipc_nl_compat_dumpit(&dump, msg, args);
962
963 kfree_skb(args);
964
965 return err;
966 }
967
968 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
969 struct nlattr **attrs)
970 {
971 int err;
972 u32 sock_ref;
973 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
974
975 nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], NULL);
976
977 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
978 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
979
980 if (sock[TIPC_NLA_SOCK_CON]) {
981 u32 node;
982 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
983
984 nla_parse_nested(con, TIPC_NLA_CON_MAX, sock[TIPC_NLA_SOCK_CON],
985 NULL);
986
987 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
988 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>",
989 tipc_zone(node),
990 tipc_cluster(node),
991 tipc_node(node),
992 nla_get_u32(con[TIPC_NLA_CON_SOCK]));
993
994 if (con[TIPC_NLA_CON_FLAG])
995 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
996 nla_get_u32(con[TIPC_NLA_CON_TYPE]),
997 nla_get_u32(con[TIPC_NLA_CON_INST]));
998 else
999 tipc_tlv_sprintf(msg->rep, "\n");
1000 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
1001 tipc_tlv_sprintf(msg->rep, " bound to");
1002
1003 err = tipc_nl_compat_publ_dump(msg, sock_ref);
1004 if (err)
1005 return err;
1006 }
1007 tipc_tlv_sprintf(msg->rep, "\n");
1008
1009 return 0;
1010 }
1011
1012 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
1013 struct nlattr **attrs)
1014 {
1015 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
1016
1017 nla_parse_nested(media, TIPC_NLA_MEDIA_MAX, attrs[TIPC_NLA_MEDIA],
1018 NULL);
1019
1020 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
1021 nla_data(media[TIPC_NLA_MEDIA_NAME]),
1022 nla_len(media[TIPC_NLA_MEDIA_NAME]));
1023 }
1024
1025 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
1026 struct nlattr **attrs)
1027 {
1028 struct tipc_node_info node_info;
1029 struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
1030
1031 nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE], NULL);
1032
1033 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1034 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1035
1036 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1037 sizeof(node_info));
1038 }
1039
1040 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1041 struct sk_buff *skb,
1042 struct tipc_nl_compat_msg *msg)
1043 {
1044 u32 val;
1045 struct nlattr *net;
1046
1047 val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1048
1049 net = nla_nest_start(skb, TIPC_NLA_NET);
1050 if (!net)
1051 return -EMSGSIZE;
1052
1053 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1054 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1055 return -EMSGSIZE;
1056 } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1057 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1058 return -EMSGSIZE;
1059 }
1060 nla_nest_end(skb, net);
1061
1062 return 0;
1063 }
1064
1065 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1066 struct nlattr **attrs)
1067 {
1068 __be32 id;
1069 struct nlattr *net[TIPC_NLA_NET_MAX + 1];
1070
1071 nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET], NULL);
1072 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1073
1074 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1075 }
1076
1077 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1078 {
1079 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1080 if (!msg->rep)
1081 return -ENOMEM;
1082
1083 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1084 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1085
1086 return 0;
1087 }
1088
1089 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1090 {
1091 struct tipc_nl_compat_cmd_dump dump;
1092 struct tipc_nl_compat_cmd_doit doit;
1093
1094 memset(&dump, 0, sizeof(dump));
1095 memset(&doit, 0, sizeof(doit));
1096
1097 switch (msg->cmd) {
1098 case TIPC_CMD_NOOP:
1099 msg->rep = tipc_tlv_alloc(0);
1100 if (!msg->rep)
1101 return -ENOMEM;
1102 return 0;
1103 case TIPC_CMD_GET_BEARER_NAMES:
1104 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1105 dump.dumpit = tipc_nl_bearer_dump;
1106 dump.format = tipc_nl_compat_bearer_dump;
1107 return tipc_nl_compat_dumpit(&dump, msg);
1108 case TIPC_CMD_ENABLE_BEARER:
1109 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1110 doit.doit = tipc_nl_bearer_enable;
1111 doit.transcode = tipc_nl_compat_bearer_enable;
1112 return tipc_nl_compat_doit(&doit, msg);
1113 case TIPC_CMD_DISABLE_BEARER:
1114 msg->req_type = TIPC_TLV_BEARER_NAME;
1115 doit.doit = tipc_nl_bearer_disable;
1116 doit.transcode = tipc_nl_compat_bearer_disable;
1117 return tipc_nl_compat_doit(&doit, msg);
1118 case TIPC_CMD_SHOW_LINK_STATS:
1119 msg->req_type = TIPC_TLV_LINK_NAME;
1120 msg->rep_size = ULTRA_STRING_MAX_LEN;
1121 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1122 dump.dumpit = tipc_nl_link_dump;
1123 dump.format = tipc_nl_compat_link_stat_dump;
1124 return tipc_nl_compat_dumpit(&dump, msg);
1125 case TIPC_CMD_GET_LINKS:
1126 msg->req_type = TIPC_TLV_NET_ADDR;
1127 msg->rep_size = ULTRA_STRING_MAX_LEN;
1128 dump.dumpit = tipc_nl_link_dump;
1129 dump.format = tipc_nl_compat_link_dump;
1130 return tipc_nl_compat_dumpit(&dump, msg);
1131 case TIPC_CMD_SET_LINK_TOL:
1132 case TIPC_CMD_SET_LINK_PRI:
1133 case TIPC_CMD_SET_LINK_WINDOW:
1134 msg->req_type = TIPC_TLV_LINK_CONFIG;
1135 doit.doit = tipc_nl_link_set;
1136 doit.transcode = tipc_nl_compat_link_set;
1137 return tipc_nl_compat_doit(&doit, msg);
1138 case TIPC_CMD_RESET_LINK_STATS:
1139 msg->req_type = TIPC_TLV_LINK_NAME;
1140 doit.doit = tipc_nl_link_reset_stats;
1141 doit.transcode = tipc_nl_compat_link_reset_stats;
1142 return tipc_nl_compat_doit(&doit, msg);
1143 case TIPC_CMD_SHOW_NAME_TABLE:
1144 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1145 msg->rep_size = ULTRA_STRING_MAX_LEN;
1146 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1147 dump.header = tipc_nl_compat_name_table_dump_header;
1148 dump.dumpit = tipc_nl_name_table_dump;
1149 dump.format = tipc_nl_compat_name_table_dump;
1150 return tipc_nl_compat_dumpit(&dump, msg);
1151 case TIPC_CMD_SHOW_PORTS:
1152 msg->rep_size = ULTRA_STRING_MAX_LEN;
1153 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1154 dump.dumpit = tipc_nl_sk_dump;
1155 dump.format = tipc_nl_compat_sk_dump;
1156 return tipc_nl_compat_dumpit(&dump, msg);
1157 case TIPC_CMD_GET_MEDIA_NAMES:
1158 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1159 dump.dumpit = tipc_nl_media_dump;
1160 dump.format = tipc_nl_compat_media_dump;
1161 return tipc_nl_compat_dumpit(&dump, msg);
1162 case TIPC_CMD_GET_NODES:
1163 msg->rep_size = ULTRA_STRING_MAX_LEN;
1164 dump.dumpit = tipc_nl_node_dump;
1165 dump.format = tipc_nl_compat_node_dump;
1166 return tipc_nl_compat_dumpit(&dump, msg);
1167 case TIPC_CMD_SET_NODE_ADDR:
1168 msg->req_type = TIPC_TLV_NET_ADDR;
1169 doit.doit = tipc_nl_net_set;
1170 doit.transcode = tipc_nl_compat_net_set;
1171 return tipc_nl_compat_doit(&doit, msg);
1172 case TIPC_CMD_SET_NETID:
1173 msg->req_type = TIPC_TLV_UNSIGNED;
1174 doit.doit = tipc_nl_net_set;
1175 doit.transcode = tipc_nl_compat_net_set;
1176 return tipc_nl_compat_doit(&doit, msg);
1177 case TIPC_CMD_GET_NETID:
1178 msg->rep_size = sizeof(u32);
1179 dump.dumpit = tipc_nl_net_dump;
1180 dump.format = tipc_nl_compat_net_dump;
1181 return tipc_nl_compat_dumpit(&dump, msg);
1182 case TIPC_CMD_SHOW_STATS:
1183 return tipc_cmd_show_stats_compat(msg);
1184 }
1185
1186 return -EOPNOTSUPP;
1187 }
1188
1189 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1190 {
1191 int err;
1192 int len;
1193 struct tipc_nl_compat_msg msg;
1194 struct nlmsghdr *req_nlh;
1195 struct nlmsghdr *rep_nlh;
1196 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1197
1198 memset(&msg, 0, sizeof(msg));
1199
1200 req_nlh = (struct nlmsghdr *)skb->data;
1201 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1202 msg.cmd = req_userhdr->cmd;
1203 msg.dst_sk = info->dst_sk;
1204 msg.net = genl_info_net(info);
1205
1206 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1207 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1208 err = -EACCES;
1209 goto send;
1210 }
1211
1212 msg.req_size = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1213 if (msg.req_size && !TLV_OK(msg.req, msg.req_size)) {
1214 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1215 err = -EOPNOTSUPP;
1216 goto send;
1217 }
1218
1219 err = tipc_nl_compat_handle(&msg);
1220 if ((err == -EOPNOTSUPP) || (err == -EPERM))
1221 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1222 else if (err == -EINVAL)
1223 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1224 send:
1225 if (!msg.rep)
1226 return err;
1227
1228 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1229 skb_push(msg.rep, len);
1230 rep_nlh = nlmsg_hdr(msg.rep);
1231 memcpy(rep_nlh, info->nlhdr, len);
1232 rep_nlh->nlmsg_len = msg.rep->len;
1233 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
1234
1235 return err;
1236 }
1237
1238 static struct genl_family tipc_genl_compat_family = {
1239 .id = GENL_ID_GENERATE,
1240 .name = TIPC_GENL_NAME,
1241 .version = TIPC_GENL_VERSION,
1242 .hdrsize = TIPC_GENL_HDRLEN,
1243 .maxattr = 0,
1244 .netnsok = true,
1245 };
1246
1247 static struct genl_ops tipc_genl_compat_ops[] = {
1248 {
1249 .cmd = TIPC_GENL_CMD,
1250 .doit = tipc_nl_compat_recv,
1251 },
1252 };
1253
1254 int tipc_netlink_compat_start(void)
1255 {
1256 int res;
1257
1258 res = genl_register_family_with_ops(&tipc_genl_compat_family,
1259 tipc_genl_compat_ops);
1260 if (res) {
1261 pr_err("Failed to register legacy compat interface\n");
1262 return res;
1263 }
1264
1265 return 0;
1266 }
1267
1268 void tipc_netlink_compat_stop(void)
1269 {
1270 genl_unregister_family(&tipc_genl_compat_family);
1271 }
1272
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