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