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add debugging code
[cor.git] / net / tipc / netlink_compat.c
blob0254bb7e418bebe772bf46c7ccd997cf95528cb1
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 struct genl_dumpit_info info;
185 int len = 0;
186 int err;
187 struct sk_buff *buf;
188 struct nlmsghdr *nlmsg;
189 struct netlink_callback cb;
190 struct nlattr **attrbuf;
191
192 memset(&cb, 0, sizeof(cb));
193 cb.nlh = (struct nlmsghdr *)arg->data;
194 cb.skb = arg;
195 cb.data = &info;
196
197 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
198 if (!buf)
199 return -ENOMEM;
200
201 buf->sk = msg->dst_sk;
202 if (__tipc_dump_start(&cb, msg->net)) {
203 kfree_skb(buf);
204 return -ENOMEM;
205 }
206
207 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1,
208 sizeof(struct nlattr *), GFP_KERNEL);
209 if (!attrbuf) {
210 err = -ENOMEM;
211 goto err_out;
212 }
213
214 info.attrs = attrbuf;
215 err = nlmsg_parse_deprecated(cb.nlh, GENL_HDRLEN, attrbuf,
216 tipc_genl_family.maxattr,
217 tipc_genl_family.policy, NULL);
218 if (err)
219 goto err_out;
220
221 do {
222 int rem;
223
224 len = (*cmd->dumpit)(buf, &cb);
225
226 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
227 err = nlmsg_parse_deprecated(nlmsg, GENL_HDRLEN,
228 attrbuf,
229 tipc_genl_family.maxattr,
230 tipc_genl_family.policy,
231 NULL);
232 if (err)
233 goto err_out;
234
235 err = (*cmd->format)(msg, attrbuf);
236 if (err)
237 goto err_out;
238
239 if (tipc_skb_tailroom(msg->rep) <= 1) {
240 err = -EMSGSIZE;
241 goto err_out;
242 }
243 }
244
245 skb_reset_tail_pointer(buf);
246 buf->len = 0;
247
248 } while (len);
249
250 err = 0;
251
252 err_out:
253 kfree(attrbuf);
254 tipc_dump_done(&cb);
255 kfree_skb(buf);
256
257 if (err == -EMSGSIZE) {
258 /* The legacy API only considered messages filling
259 * "ULTRA_STRING_MAX_LEN" to be truncated.
260 */
261 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
262 char *tail = skb_tail_pointer(msg->rep);
263
264 if (*tail != '\0')
265 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
266 REPLY_TRUNCATED);
267 }
268
269 return 0;
270 }
271
272 return err;
273 }
274
275 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
276 struct tipc_nl_compat_msg *msg)
277 {
278 int err;
279 struct sk_buff *arg;
280
281 if (msg->req_type && (!msg->req_size ||
282 !TLV_CHECK_TYPE(msg->req, msg->req_type)))
283 return -EINVAL;
284
285 msg->rep = tipc_tlv_alloc(msg->rep_size);
286 if (!msg->rep)
287 return -ENOMEM;
288
289 if (msg->rep_type)
290 tipc_tlv_init(msg->rep, msg->rep_type);
291
292 if (cmd->header) {
293 err = (*cmd->header)(msg);
294 if (err) {
295 kfree_skb(msg->rep);
296 msg->rep = NULL;
297 return err;
298 }
299 }
300
301 arg = nlmsg_new(0, GFP_KERNEL);
302 if (!arg) {
303 kfree_skb(msg->rep);
304 msg->rep = NULL;
305 return -ENOMEM;
306 }
307
308 err = __tipc_nl_compat_dumpit(cmd, msg, arg);
309 if (err) {
310 kfree_skb(msg->rep);
311 msg->rep = NULL;
312 }
313 kfree_skb(arg);
314
315 return err;
316 }
317
318 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
319 struct tipc_nl_compat_msg *msg)
320 {
321 int err;
322 struct sk_buff *doit_buf;
323 struct sk_buff *trans_buf;
324 struct nlattr **attrbuf;
325 struct genl_info info;
326
327 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
328 if (!trans_buf)
329 return -ENOMEM;
330
331 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1,
332 sizeof(struct nlattr *),
333 GFP_KERNEL);
334 if (!attrbuf) {
335 err = -ENOMEM;
336 goto trans_out;
337 }
338
339 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
340 if (!doit_buf) {
341 err = -ENOMEM;
342 goto attrbuf_out;
343 }
344
345 memset(&info, 0, sizeof(info));
346 info.attrs = attrbuf;
347
348 rtnl_lock();
349 err = (*cmd->transcode)(cmd, trans_buf, msg);
350 if (err)
351 goto doit_out;
352
353 err = nla_parse_deprecated(attrbuf, tipc_genl_family.maxattr,
354 (const struct nlattr *)trans_buf->data,
355 trans_buf->len, NULL, NULL);
356 if (err)
357 goto doit_out;
358
359 doit_buf->sk = msg->dst_sk;
360
361 err = (*cmd->doit)(doit_buf, &info);
362 doit_out:
363 rtnl_unlock();
364
365 kfree_skb(doit_buf);
366 attrbuf_out:
367 kfree(attrbuf);
368 trans_out:
369 kfree_skb(trans_buf);
370
371 return err;
372 }
373
374 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
375 struct tipc_nl_compat_msg *msg)
376 {
377 int err;
378
379 if (msg->req_type && (!msg->req_size ||
380 !TLV_CHECK_TYPE(msg->req, msg->req_type)))
381 return -EINVAL;
382
383 err = __tipc_nl_compat_doit(cmd, msg);
384 if (err)
385 return err;
386
387 /* The legacy API considered an empty message a success message */
388 msg->rep = tipc_tlv_alloc(0);
389 if (!msg->rep)
390 return -ENOMEM;
391
392 return 0;
393 }
394
395 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
396 struct nlattr **attrs)
397 {
398 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
399 int err;
400
401 if (!attrs[TIPC_NLA_BEARER])
402 return -EINVAL;
403
404 err = nla_parse_nested_deprecated(bearer, TIPC_NLA_BEARER_MAX,
405 attrs[TIPC_NLA_BEARER], NULL, NULL);
406 if (err)
407 return err;
408
409 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
410 nla_data(bearer[TIPC_NLA_BEARER_NAME]),
411 nla_len(bearer[TIPC_NLA_BEARER_NAME]));
412 }
413
414 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
415 struct sk_buff *skb,
416 struct tipc_nl_compat_msg *msg)
417 {
418 struct nlattr *prop;
419 struct nlattr *bearer;
420 struct tipc_bearer_config *b;
421 int len;
422
423 b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
424
425 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
426 if (!bearer)
427 return -EMSGSIZE;
428
429 len = TLV_GET_DATA_LEN(msg->req);
430 len -= offsetof(struct tipc_bearer_config, name);
431 if (len <= 0)
432 return -EINVAL;
433
434 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
435 if (!string_is_valid(b->name, len))
436 return -EINVAL;
437
438 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
439 return -EMSGSIZE;
440
441 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
442 return -EMSGSIZE;
443
444 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
445 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
446 if (!prop)
447 return -EMSGSIZE;
448 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
449 return -EMSGSIZE;
450 nla_nest_end(skb, prop);
451 }
452 nla_nest_end(skb, bearer);
453
454 return 0;
455 }
456
457 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
458 struct sk_buff *skb,
459 struct tipc_nl_compat_msg *msg)
460 {
461 char *name;
462 struct nlattr *bearer;
463 int len;
464
465 name = (char *)TLV_DATA(msg->req);
466
467 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
468 if (!bearer)
469 return -EMSGSIZE;
470
471 len = TLV_GET_DATA_LEN(msg->req);
472 if (len <= 0)
473 return -EINVAL;
474
475 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
476 if (!string_is_valid(name, len))
477 return -EINVAL;
478
479 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
480 return -EMSGSIZE;
481
482 nla_nest_end(skb, bearer);
483
484 return 0;
485 }
486
487 static inline u32 perc(u32 count, u32 total)
488 {
489 return (count * 100 + (total / 2)) / total;
490 }
491
492 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
493 struct nlattr *prop[], struct nlattr *stats[])
494 {
495 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
496 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
497
498 tipc_tlv_sprintf(msg->rep,
499 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
500 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
501 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
502 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
503 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
504 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
505
506 tipc_tlv_sprintf(msg->rep,
507 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
508 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
509 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
510 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
511 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
512 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
513
514 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
515 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
516 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
517 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
518
519 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
520 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
521 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
522 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
523
524 tipc_tlv_sprintf(msg->rep,
525 " Congestion link:%u Send queue max:%u avg:%u",
526 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
527 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
528 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
529 }
530
531 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
532 struct nlattr **attrs)
533 {
534 char *name;
535 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
536 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
537 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
538 int err;
539 int len;
540
541 if (!attrs[TIPC_NLA_LINK])
542 return -EINVAL;
543
544 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
545 attrs[TIPC_NLA_LINK], NULL, NULL);
546 if (err)
547 return err;
548
549 if (!link[TIPC_NLA_LINK_PROP])
550 return -EINVAL;
551
552 err = nla_parse_nested_deprecated(prop, TIPC_NLA_PROP_MAX,
553 link[TIPC_NLA_LINK_PROP], NULL,
554 NULL);
555 if (err)
556 return err;
557
558 if (!link[TIPC_NLA_LINK_STATS])
559 return -EINVAL;
560
561 err = nla_parse_nested_deprecated(stats, TIPC_NLA_STATS_MAX,
562 link[TIPC_NLA_LINK_STATS], NULL,
563 NULL);
564 if (err)
565 return err;
566
567 name = (char *)TLV_DATA(msg->req);
568
569 len = TLV_GET_DATA_LEN(msg->req);
570 if (len <= 0)
571 return -EINVAL;
572
573 len = min_t(int, len, TIPC_MAX_LINK_NAME);
574 if (!string_is_valid(name, len))
575 return -EINVAL;
576
577 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
578 return 0;
579
580 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
581 nla_data(link[TIPC_NLA_LINK_NAME]));
582
583 if (link[TIPC_NLA_LINK_BROADCAST]) {
584 __fill_bc_link_stat(msg, prop, stats);
585 return 0;
586 }
587
588 if (link[TIPC_NLA_LINK_ACTIVE])
589 tipc_tlv_sprintf(msg->rep, " ACTIVE");
590 else if (link[TIPC_NLA_LINK_UP])
591 tipc_tlv_sprintf(msg->rep, " STANDBY");
592 else
593 tipc_tlv_sprintf(msg->rep, " DEFUNCT");
594
595 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
596 nla_get_u32(link[TIPC_NLA_LINK_MTU]),
597 nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
598
599 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
600 nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
601 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
602
603 tipc_tlv_sprintf(msg->rep,
604 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
605 nla_get_u32(link[TIPC_NLA_LINK_RX]) -
606 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
607 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
608 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
609 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
610 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
611
612 tipc_tlv_sprintf(msg->rep,
613 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
614 nla_get_u32(link[TIPC_NLA_LINK_TX]) -
615 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
616 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
617 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
618 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
619 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
620
621 tipc_tlv_sprintf(msg->rep,
622 " TX profile sample:%u packets average:%u octets\n",
623 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
624 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
625 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
626
627 tipc_tlv_sprintf(msg->rep,
628 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
629 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
630 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
631 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
632 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
633 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
634 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
635 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
636 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
637
638 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
639 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
640 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
641 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
642 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
643 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
644 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
645
646 tipc_tlv_sprintf(msg->rep,
647 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
648 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
649 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
650 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
651 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
652 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
653
654 tipc_tlv_sprintf(msg->rep,
655 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
656 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
657 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
658 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
659 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
660 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
661
662 tipc_tlv_sprintf(msg->rep,
663 " Congestion link:%u Send queue max:%u avg:%u",
664 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
665 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
666 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
667
668 return 0;
669 }
670
671 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
672 struct nlattr **attrs)
673 {
674 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
675 struct tipc_link_info link_info;
676 int err;
677
678 if (!attrs[TIPC_NLA_LINK])
679 return -EINVAL;
680
681 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
682 attrs[TIPC_NLA_LINK], NULL, NULL);
683 if (err)
684 return err;
685
686 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
687 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
688 nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME],
689 TIPC_MAX_LINK_NAME);
690
691 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
692 &link_info, sizeof(link_info));
693 }
694
695 static int __tipc_add_link_prop(struct sk_buff *skb,
696 struct tipc_nl_compat_msg *msg,
697 struct tipc_link_config *lc)
698 {
699 switch (msg->cmd) {
700 case TIPC_CMD_SET_LINK_PRI:
701 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
702 case TIPC_CMD_SET_LINK_TOL:
703 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
704 case TIPC_CMD_SET_LINK_WINDOW:
705 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
706 }
707
708 return -EINVAL;
709 }
710
711 static int tipc_nl_compat_media_set(struct sk_buff *skb,
712 struct tipc_nl_compat_msg *msg)
713 {
714 struct nlattr *prop;
715 struct nlattr *media;
716 struct tipc_link_config *lc;
717
718 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
719
720 media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA);
721 if (!media)
722 return -EMSGSIZE;
723
724 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
725 return -EMSGSIZE;
726
727 prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_PROP);
728 if (!prop)
729 return -EMSGSIZE;
730
731 __tipc_add_link_prop(skb, msg, lc);
732 nla_nest_end(skb, prop);
733 nla_nest_end(skb, media);
734
735 return 0;
736 }
737
738 static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
739 struct tipc_nl_compat_msg *msg)
740 {
741 struct nlattr *prop;
742 struct nlattr *bearer;
743 struct tipc_link_config *lc;
744
745 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
746
747 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
748 if (!bearer)
749 return -EMSGSIZE;
750
751 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
752 return -EMSGSIZE;
753
754 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
755 if (!prop)
756 return -EMSGSIZE;
757
758 __tipc_add_link_prop(skb, msg, lc);
759 nla_nest_end(skb, prop);
760 nla_nest_end(skb, bearer);
761
762 return 0;
763 }
764
765 static int __tipc_nl_compat_link_set(struct sk_buff *skb,
766 struct tipc_nl_compat_msg *msg)
767 {
768 struct nlattr *prop;
769 struct nlattr *link;
770 struct tipc_link_config *lc;
771
772 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
773
774 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
775 if (!link)
776 return -EMSGSIZE;
777
778 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
779 return -EMSGSIZE;
780
781 prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP);
782 if (!prop)
783 return -EMSGSIZE;
784
785 __tipc_add_link_prop(skb, msg, lc);
786 nla_nest_end(skb, prop);
787 nla_nest_end(skb, link);
788
789 return 0;
790 }
791
792 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
793 struct sk_buff *skb,
794 struct tipc_nl_compat_msg *msg)
795 {
796 struct tipc_link_config *lc;
797 struct tipc_bearer *bearer;
798 struct tipc_media *media;
799 int len;
800
801 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
802
803 len = TLV_GET_DATA_LEN(msg->req);
804 len -= offsetof(struct tipc_link_config, name);
805 if (len <= 0)
806 return -EINVAL;
807
808 len = min_t(int, len, TIPC_MAX_LINK_NAME);
809 if (!string_is_valid(lc->name, len))
810 return -EINVAL;
811
812 media = tipc_media_find(lc->name);
813 if (media) {
814 cmd->doit = &__tipc_nl_media_set;
815 return tipc_nl_compat_media_set(skb, msg);
816 }
817
818 bearer = tipc_bearer_find(msg->net, lc->name);
819 if (bearer) {
820 cmd->doit = &__tipc_nl_bearer_set;
821 return tipc_nl_compat_bearer_set(skb, msg);
822 }
823
824 return __tipc_nl_compat_link_set(skb, msg);
825 }
826
827 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
828 struct sk_buff *skb,
829 struct tipc_nl_compat_msg *msg)
830 {
831 char *name;
832 struct nlattr *link;
833 int len;
834
835 name = (char *)TLV_DATA(msg->req);
836
837 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
838 if (!link)
839 return -EMSGSIZE;
840
841 len = TLV_GET_DATA_LEN(msg->req);
842 if (len <= 0)
843 return -EINVAL;
844
845 len = min_t(int, len, TIPC_MAX_LINK_NAME);
846 if (!string_is_valid(name, len))
847 return -EINVAL;
848
849 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
850 return -EMSGSIZE;
851
852 nla_nest_end(skb, link);
853
854 return 0;
855 }
856
857 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
858 {
859 int i;
860 u32 depth;
861 struct tipc_name_table_query *ntq;
862 static const char * const header[] = {
863 "Type ",
864 "Lower Upper ",
865 "Port Identity ",
866 "Publication Scope"
867 };
868
869 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
870 if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query))
871 return -EINVAL;
872
873 depth = ntohl(ntq->depth);
874
875 if (depth > 4)
876 depth = 4;
877 for (i = 0; i < depth; i++)
878 tipc_tlv_sprintf(msg->rep, header[i]);
879 tipc_tlv_sprintf(msg->rep, "\n");
880
881 return 0;
882 }
883
884 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
885 struct nlattr **attrs)
886 {
887 char port_str[27];
888 struct tipc_name_table_query *ntq;
889 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
890 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
891 u32 node, depth, type, lowbound, upbound;
892 static const char * const scope_str[] = {"", " zone", " cluster",
893 " node"};
894 int err;
895
896 if (!attrs[TIPC_NLA_NAME_TABLE])
897 return -EINVAL;
898
899 err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX,
900 attrs[TIPC_NLA_NAME_TABLE], NULL,
901 NULL);
902 if (err)
903 return err;
904
905 if (!nt[TIPC_NLA_NAME_TABLE_PUBL])
906 return -EINVAL;
907
908 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
909 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL,
910 NULL);
911 if (err)
912 return err;
913
914 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
915
916 depth = ntohl(ntq->depth);
917 type = ntohl(ntq->type);
918 lowbound = ntohl(ntq->lowbound);
919 upbound = ntohl(ntq->upbound);
920
921 if (!(depth & TIPC_NTQ_ALLTYPES) &&
922 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
923 return 0;
924 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
925 return 0;
926 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
927 return 0;
928
929 tipc_tlv_sprintf(msg->rep, "%-10u ",
930 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
931
932 if (depth == 1)
933 goto out;
934
935 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
936 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
937 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
938
939 if (depth == 2)
940 goto out;
941
942 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
943 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
944 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
945 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
946
947 if (depth == 3)
948 goto out;
949
950 tipc_tlv_sprintf(msg->rep, "%-10u %s",
951 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
952 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
953 out:
954 tipc_tlv_sprintf(msg->rep, "\n");
955
956 return 0;
957 }
958
959 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
960 struct nlattr **attrs)
961 {
962 u32 type, lower, upper;
963 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
964 int err;
965
966 if (!attrs[TIPC_NLA_PUBL])
967 return -EINVAL;
968
969 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
970 attrs[TIPC_NLA_PUBL], NULL, NULL);
971 if (err)
972 return err;
973
974 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
975 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
976 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
977
978 if (lower == upper)
979 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
980 else
981 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
982
983 return 0;
984 }
985
986 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
987 {
988 int err;
989 void *hdr;
990 struct nlattr *nest;
991 struct sk_buff *args;
992 struct tipc_nl_compat_cmd_dump dump;
993
994 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
995 if (!args)
996 return -ENOMEM;
997
998 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
999 TIPC_NL_PUBL_GET);
1000 if (!hdr) {
1001 kfree_skb(args);
1002 return -EMSGSIZE;
1003 }
1004
1005 nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK);
1006 if (!nest) {
1007 kfree_skb(args);
1008 return -EMSGSIZE;
1009 }
1010
1011 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
1012 kfree_skb(args);
1013 return -EMSGSIZE;
1014 }
1015
1016 nla_nest_end(args, nest);
1017 genlmsg_end(args, hdr);
1018
1019 dump.dumpit = tipc_nl_publ_dump;
1020 dump.format = __tipc_nl_compat_publ_dump;
1021
1022 err = __tipc_nl_compat_dumpit(&dump, msg, args);
1023
1024 kfree_skb(args);
1025
1026 return err;
1027 }
1028
1029 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
1030 struct nlattr **attrs)
1031 {
1032 int err;
1033 u32 sock_ref;
1034 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
1035
1036 if (!attrs[TIPC_NLA_SOCK])
1037 return -EINVAL;
1038
1039 err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX,
1040 attrs[TIPC_NLA_SOCK], NULL, NULL);
1041 if (err)
1042 return err;
1043
1044 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
1045 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
1046
1047 if (sock[TIPC_NLA_SOCK_CON]) {
1048 u32 node;
1049 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
1050
1051 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX,
1052 sock[TIPC_NLA_SOCK_CON],
1053 NULL, NULL);
1054
1055 if (err)
1056 return err;
1057
1058 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
1059 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>",
1060 tipc_zone(node),
1061 tipc_cluster(node),
1062 tipc_node(node),
1063 nla_get_u32(con[TIPC_NLA_CON_SOCK]));
1064
1065 if (con[TIPC_NLA_CON_FLAG])
1066 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
1067 nla_get_u32(con[TIPC_NLA_CON_TYPE]),
1068 nla_get_u32(con[TIPC_NLA_CON_INST]));
1069 else
1070 tipc_tlv_sprintf(msg->rep, "\n");
1071 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
1072 tipc_tlv_sprintf(msg->rep, " bound to");
1073
1074 err = tipc_nl_compat_publ_dump(msg, sock_ref);
1075 if (err)
1076 return err;
1077 }
1078 tipc_tlv_sprintf(msg->rep, "\n");
1079
1080 return 0;
1081 }
1082
1083 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
1084 struct nlattr **attrs)
1085 {
1086 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
1087 int err;
1088
1089 if (!attrs[TIPC_NLA_MEDIA])
1090 return -EINVAL;
1091
1092 err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX,
1093 attrs[TIPC_NLA_MEDIA], NULL, NULL);
1094 if (err)
1095 return err;
1096
1097 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
1098 nla_data(media[TIPC_NLA_MEDIA_NAME]),
1099 nla_len(media[TIPC_NLA_MEDIA_NAME]));
1100 }
1101
1102 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
1103 struct nlattr **attrs)
1104 {
1105 struct tipc_node_info node_info;
1106 struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
1107 int err;
1108
1109 if (!attrs[TIPC_NLA_NODE])
1110 return -EINVAL;
1111
1112 err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX,
1113 attrs[TIPC_NLA_NODE], NULL, NULL);
1114 if (err)
1115 return err;
1116
1117 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1118 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1119
1120 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1121 sizeof(node_info));
1122 }
1123
1124 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1125 struct sk_buff *skb,
1126 struct tipc_nl_compat_msg *msg)
1127 {
1128 u32 val;
1129 struct nlattr *net;
1130
1131 val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1132
1133 net = nla_nest_start_noflag(skb, TIPC_NLA_NET);
1134 if (!net)
1135 return -EMSGSIZE;
1136
1137 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1138 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1139 return -EMSGSIZE;
1140 } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1141 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1142 return -EMSGSIZE;
1143 }
1144 nla_nest_end(skb, net);
1145
1146 return 0;
1147 }
1148
1149 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1150 struct nlattr **attrs)
1151 {
1152 __be32 id;
1153 struct nlattr *net[TIPC_NLA_NET_MAX + 1];
1154 int err;
1155
1156 if (!attrs[TIPC_NLA_NET])
1157 return -EINVAL;
1158
1159 err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX,
1160 attrs[TIPC_NLA_NET], NULL, NULL);
1161 if (err)
1162 return err;
1163
1164 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1165
1166 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1167 }
1168
1169 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1170 {
1171 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1172 if (!msg->rep)
1173 return -ENOMEM;
1174
1175 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1176 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1177
1178 return 0;
1179 }
1180
1181 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1182 {
1183 struct tipc_nl_compat_cmd_dump dump;
1184 struct tipc_nl_compat_cmd_doit doit;
1185
1186 memset(&dump, 0, sizeof(dump));
1187 memset(&doit, 0, sizeof(doit));
1188
1189 switch (msg->cmd) {
1190 case TIPC_CMD_NOOP:
1191 msg->rep = tipc_tlv_alloc(0);
1192 if (!msg->rep)
1193 return -ENOMEM;
1194 return 0;
1195 case TIPC_CMD_GET_BEARER_NAMES:
1196 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1197 dump.dumpit = tipc_nl_bearer_dump;
1198 dump.format = tipc_nl_compat_bearer_dump;
1199 return tipc_nl_compat_dumpit(&dump, msg);
1200 case TIPC_CMD_ENABLE_BEARER:
1201 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1202 doit.doit = __tipc_nl_bearer_enable;
1203 doit.transcode = tipc_nl_compat_bearer_enable;
1204 return tipc_nl_compat_doit(&doit, msg);
1205 case TIPC_CMD_DISABLE_BEARER:
1206 msg->req_type = TIPC_TLV_BEARER_NAME;
1207 doit.doit = __tipc_nl_bearer_disable;
1208 doit.transcode = tipc_nl_compat_bearer_disable;
1209 return tipc_nl_compat_doit(&doit, msg);
1210 case TIPC_CMD_SHOW_LINK_STATS:
1211 msg->req_type = TIPC_TLV_LINK_NAME;
1212 msg->rep_size = ULTRA_STRING_MAX_LEN;
1213 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1214 dump.dumpit = tipc_nl_node_dump_link;
1215 dump.format = tipc_nl_compat_link_stat_dump;
1216 return tipc_nl_compat_dumpit(&dump, msg);
1217 case TIPC_CMD_GET_LINKS:
1218 msg->req_type = TIPC_TLV_NET_ADDR;
1219 msg->rep_size = ULTRA_STRING_MAX_LEN;
1220 dump.dumpit = tipc_nl_node_dump_link;
1221 dump.format = tipc_nl_compat_link_dump;
1222 return tipc_nl_compat_dumpit(&dump, msg);
1223 case TIPC_CMD_SET_LINK_TOL:
1224 case TIPC_CMD_SET_LINK_PRI:
1225 case TIPC_CMD_SET_LINK_WINDOW:
1226 msg->req_type = TIPC_TLV_LINK_CONFIG;
1227 doit.doit = tipc_nl_node_set_link;
1228 doit.transcode = tipc_nl_compat_link_set;
1229 return tipc_nl_compat_doit(&doit, msg);
1230 case TIPC_CMD_RESET_LINK_STATS:
1231 msg->req_type = TIPC_TLV_LINK_NAME;
1232 doit.doit = tipc_nl_node_reset_link_stats;
1233 doit.transcode = tipc_nl_compat_link_reset_stats;
1234 return tipc_nl_compat_doit(&doit, msg);
1235 case TIPC_CMD_SHOW_NAME_TABLE:
1236 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1237 msg->rep_size = ULTRA_STRING_MAX_LEN;
1238 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1239 dump.header = tipc_nl_compat_name_table_dump_header;
1240 dump.dumpit = tipc_nl_name_table_dump;
1241 dump.format = tipc_nl_compat_name_table_dump;
1242 return tipc_nl_compat_dumpit(&dump, msg);
1243 case TIPC_CMD_SHOW_PORTS:
1244 msg->rep_size = ULTRA_STRING_MAX_LEN;
1245 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1246 dump.dumpit = tipc_nl_sk_dump;
1247 dump.format = tipc_nl_compat_sk_dump;
1248 return tipc_nl_compat_dumpit(&dump, msg);
1249 case TIPC_CMD_GET_MEDIA_NAMES:
1250 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1251 dump.dumpit = tipc_nl_media_dump;
1252 dump.format = tipc_nl_compat_media_dump;
1253 return tipc_nl_compat_dumpit(&dump, msg);
1254 case TIPC_CMD_GET_NODES:
1255 msg->rep_size = ULTRA_STRING_MAX_LEN;
1256 dump.dumpit = tipc_nl_node_dump;
1257 dump.format = tipc_nl_compat_node_dump;
1258 return tipc_nl_compat_dumpit(&dump, msg);
1259 case TIPC_CMD_SET_NODE_ADDR:
1260 msg->req_type = TIPC_TLV_NET_ADDR;
1261 doit.doit = __tipc_nl_net_set;
1262 doit.transcode = tipc_nl_compat_net_set;
1263 return tipc_nl_compat_doit(&doit, msg);
1264 case TIPC_CMD_SET_NETID:
1265 msg->req_type = TIPC_TLV_UNSIGNED;
1266 doit.doit = __tipc_nl_net_set;
1267 doit.transcode = tipc_nl_compat_net_set;
1268 return tipc_nl_compat_doit(&doit, msg);
1269 case TIPC_CMD_GET_NETID:
1270 msg->rep_size = sizeof(u32);
1271 dump.dumpit = tipc_nl_net_dump;
1272 dump.format = tipc_nl_compat_net_dump;
1273 return tipc_nl_compat_dumpit(&dump, msg);
1274 case TIPC_CMD_SHOW_STATS:
1275 return tipc_cmd_show_stats_compat(msg);
1276 }
1277
1278 return -EOPNOTSUPP;
1279 }
1280
1281 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1282 {
1283 int err;
1284 int len;
1285 struct tipc_nl_compat_msg msg;
1286 struct nlmsghdr *req_nlh;
1287 struct nlmsghdr *rep_nlh;
1288 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1289
1290 memset(&msg, 0, sizeof(msg));
1291
1292 req_nlh = (struct nlmsghdr *)skb->data;
1293 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1294 msg.cmd = req_userhdr->cmd;
1295 msg.net = genl_info_net(info);
1296 msg.dst_sk = skb->sk;
1297
1298 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1299 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1300 err = -EACCES;
1301 goto send;
1302 }
1303
1304 msg.req_size = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1305 if (msg.req_size && !TLV_OK(msg.req, msg.req_size)) {
1306 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1307 err = -EOPNOTSUPP;
1308 goto send;
1309 }
1310
1311 err = tipc_nl_compat_handle(&msg);
1312 if ((err == -EOPNOTSUPP) || (err == -EPERM))
1313 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1314 else if (err == -EINVAL)
1315 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1316 send:
1317 if (!msg.rep)
1318 return err;
1319
1320 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1321 skb_push(msg.rep, len);
1322 rep_nlh = nlmsg_hdr(msg.rep);
1323 memcpy(rep_nlh, info->nlhdr, len);
1324 rep_nlh->nlmsg_len = msg.rep->len;
1325 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
1326
1327 return err;
1328 }
1329
1330 static const struct genl_ops tipc_genl_compat_ops[] = {
1331 {
1332 .cmd = TIPC_GENL_CMD,
1333 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1334 .doit = tipc_nl_compat_recv,
1335 },
1336 };
1337
1338 static struct genl_family tipc_genl_compat_family __ro_after_init = {
1339 .name = TIPC_GENL_NAME,
1340 .version = TIPC_GENL_VERSION,
1341 .hdrsize = TIPC_GENL_HDRLEN,
1342 .maxattr = 0,
1343 .netnsok = true,
1344 .module = THIS_MODULE,
1345 .ops = tipc_genl_compat_ops,
1346 .n_ops = ARRAY_SIZE(tipc_genl_compat_ops),
1347 };
1348
1349 int __init tipc_netlink_compat_start(void)
1350 {
1351 int res;
1352
1353 res = genl_register_family(&tipc_genl_compat_family);
1354 if (res) {
1355 pr_err("Failed to register legacy compat interface\n");
1356 return res;
1357 }
1358
1359 return 0;
1360 }
1361
1362 void tipc_netlink_compat_stop(void)
1363 {
1364 genl_unregister_family(&tipc_genl_compat_family);
1365 }
connection oriented routing