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Merge tag 'x86-entry-2021-04-26' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-jammy-kernel.git] / net / tipc / netlink_compat.c
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 __printf(2, 3) int tipc_tlv_sprintf(struct sk_buff *skb,
122 const char *fmt, ...)
123 {
124 int n;
125 u16 len;
126 u32 rem;
127 char *buf;
128 struct tlv_desc *tlv;
129 va_list args;
130
131 rem = tipc_skb_tailroom(skb);
132
133 tlv = (struct tlv_desc *)skb->data;
134 len = TLV_GET_LEN(tlv);
135 buf = TLV_DATA(tlv) + len;
136
137 va_start(args, fmt);
138 n = vscnprintf(buf, rem, fmt, args);
139 va_end(args);
140
141 TLV_SET_LEN(tlv, n + len);
142 skb_put(skb, n);
143
144 return n;
145 }
146
147 static struct sk_buff *tipc_tlv_alloc(int size)
148 {
149 int hdr_len;
150 struct sk_buff *buf;
151
152 size = TLV_SPACE(size);
153 hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
154
155 buf = alloc_skb(hdr_len + size, GFP_KERNEL);
156 if (!buf)
157 return NULL;
158
159 skb_reserve(buf, hdr_len);
160
161 return buf;
162 }
163
164 static struct sk_buff *tipc_get_err_tlv(char *str)
165 {
166 int str_len = strlen(str) + 1;
167 struct sk_buff *buf;
168
169 buf = tipc_tlv_alloc(TLV_SPACE(str_len));
170 if (buf)
171 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
172
173 return buf;
174 }
175
176 static inline bool string_is_valid(char *s, int len)
177 {
178 return memchr(s, '\0', len) ? true : false;
179 }
180
181 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
182 struct tipc_nl_compat_msg *msg,
183 struct sk_buff *arg)
184 {
185 struct genl_dumpit_info info;
186 int len = 0;
187 int err;
188 struct sk_buff *buf;
189 struct nlmsghdr *nlmsg;
190 struct netlink_callback cb;
191 struct nlattr **attrbuf;
192
193 memset(&cb, 0, sizeof(cb));
194 cb.nlh = (struct nlmsghdr *)arg->data;
195 cb.skb = arg;
196 cb.data = &info;
197
198 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
199 if (!buf)
200 return -ENOMEM;
201
202 buf->sk = msg->dst_sk;
203 if (__tipc_dump_start(&cb, msg->net)) {
204 kfree_skb(buf);
205 return -ENOMEM;
206 }
207
208 attrbuf = kcalloc(tipc_genl_family.maxattr + 1,
209 sizeof(struct nlattr *), GFP_KERNEL);
210 if (!attrbuf) {
211 err = -ENOMEM;
212 goto err_out;
213 }
214
215 info.attrs = attrbuf;
216
217 if (nlmsg_len(cb.nlh) > 0) {
218 err = nlmsg_parse_deprecated(cb.nlh, GENL_HDRLEN, attrbuf,
219 tipc_genl_family.maxattr,
220 tipc_genl_family.policy, NULL);
221 if (err)
222 goto err_out;
223 }
224 do {
225 int rem;
226
227 len = (*cmd->dumpit)(buf, &cb);
228
229 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
230 err = nlmsg_parse_deprecated(nlmsg, GENL_HDRLEN,
231 attrbuf,
232 tipc_genl_family.maxattr,
233 tipc_genl_family.policy,
234 NULL);
235 if (err)
236 goto err_out;
237
238 err = (*cmd->format)(msg, attrbuf);
239 if (err)
240 goto err_out;
241
242 if (tipc_skb_tailroom(msg->rep) <= 1) {
243 err = -EMSGSIZE;
244 goto err_out;
245 }
246 }
247
248 skb_reset_tail_pointer(buf);
249 buf->len = 0;
250
251 } while (len);
252
253 err = 0;
254
255 err_out:
256 kfree(attrbuf);
257 tipc_dump_done(&cb);
258 kfree_skb(buf);
259
260 if (err == -EMSGSIZE) {
261 /* The legacy API only considered messages filling
262 * "ULTRA_STRING_MAX_LEN" to be truncated.
263 */
264 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
265 char *tail = skb_tail_pointer(msg->rep);
266
267 if (*tail != '\0')
268 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
269 REPLY_TRUNCATED);
270 }
271
272 return 0;
273 }
274
275 return err;
276 }
277
278 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
279 struct tipc_nl_compat_msg *msg)
280 {
281 struct nlmsghdr *nlh;
282 struct sk_buff *arg;
283 int err;
284
285 if (msg->req_type && (!msg->req_size ||
286 !TLV_CHECK_TYPE(msg->req, msg->req_type)))
287 return -EINVAL;
288
289 msg->rep = tipc_tlv_alloc(msg->rep_size);
290 if (!msg->rep)
291 return -ENOMEM;
292
293 if (msg->rep_type)
294 tipc_tlv_init(msg->rep, msg->rep_type);
295
296 if (cmd->header) {
297 err = (*cmd->header)(msg);
298 if (err) {
299 kfree_skb(msg->rep);
300 msg->rep = NULL;
301 return err;
302 }
303 }
304
305 arg = nlmsg_new(0, GFP_KERNEL);
306 if (!arg) {
307 kfree_skb(msg->rep);
308 msg->rep = NULL;
309 return -ENOMEM;
310 }
311
312 nlh = nlmsg_put(arg, 0, 0, tipc_genl_family.id, 0, NLM_F_MULTI);
313 if (!nlh) {
314 kfree_skb(arg);
315 kfree_skb(msg->rep);
316 msg->rep = NULL;
317 return -EMSGSIZE;
318 }
319 nlmsg_end(arg, nlh);
320
321 err = __tipc_nl_compat_dumpit(cmd, msg, arg);
322 if (err) {
323 kfree_skb(msg->rep);
324 msg->rep = NULL;
325 }
326 kfree_skb(arg);
327
328 return err;
329 }
330
331 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
332 struct tipc_nl_compat_msg *msg)
333 {
334 int err;
335 struct sk_buff *doit_buf;
336 struct sk_buff *trans_buf;
337 struct nlattr **attrbuf;
338 struct genl_info info;
339
340 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
341 if (!trans_buf)
342 return -ENOMEM;
343
344 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1,
345 sizeof(struct nlattr *),
346 GFP_KERNEL);
347 if (!attrbuf) {
348 err = -ENOMEM;
349 goto trans_out;
350 }
351
352 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
353 if (!doit_buf) {
354 err = -ENOMEM;
355 goto attrbuf_out;
356 }
357
358 memset(&info, 0, sizeof(info));
359 info.attrs = attrbuf;
360
361 rtnl_lock();
362 err = (*cmd->transcode)(cmd, trans_buf, msg);
363 if (err)
364 goto doit_out;
365
366 err = nla_parse_deprecated(attrbuf, tipc_genl_family.maxattr,
367 (const struct nlattr *)trans_buf->data,
368 trans_buf->len, NULL, NULL);
369 if (err)
370 goto doit_out;
371
372 doit_buf->sk = msg->dst_sk;
373
374 err = (*cmd->doit)(doit_buf, &info);
375 doit_out:
376 rtnl_unlock();
377
378 kfree_skb(doit_buf);
379 attrbuf_out:
380 kfree(attrbuf);
381 trans_out:
382 kfree_skb(trans_buf);
383
384 return err;
385 }
386
387 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
388 struct tipc_nl_compat_msg *msg)
389 {
390 int err;
391
392 if (msg->req_type && (!msg->req_size ||
393 !TLV_CHECK_TYPE(msg->req, msg->req_type)))
394 return -EINVAL;
395
396 err = __tipc_nl_compat_doit(cmd, msg);
397 if (err)
398 return err;
399
400 /* The legacy API considered an empty message a success message */
401 msg->rep = tipc_tlv_alloc(0);
402 if (!msg->rep)
403 return -ENOMEM;
404
405 return 0;
406 }
407
408 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
409 struct nlattr **attrs)
410 {
411 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
412 int err;
413
414 if (!attrs[TIPC_NLA_BEARER])
415 return -EINVAL;
416
417 err = nla_parse_nested_deprecated(bearer, TIPC_NLA_BEARER_MAX,
418 attrs[TIPC_NLA_BEARER], NULL, NULL);
419 if (err)
420 return err;
421
422 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
423 nla_data(bearer[TIPC_NLA_BEARER_NAME]),
424 nla_len(bearer[TIPC_NLA_BEARER_NAME]));
425 }
426
427 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
428 struct sk_buff *skb,
429 struct tipc_nl_compat_msg *msg)
430 {
431 struct nlattr *prop;
432 struct nlattr *bearer;
433 struct tipc_bearer_config *b;
434 int len;
435
436 b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
437
438 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
439 if (!bearer)
440 return -EMSGSIZE;
441
442 len = TLV_GET_DATA_LEN(msg->req);
443 len -= offsetof(struct tipc_bearer_config, name);
444 if (len <= 0)
445 return -EINVAL;
446
447 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
448 if (!string_is_valid(b->name, len))
449 return -EINVAL;
450
451 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
452 return -EMSGSIZE;
453
454 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
455 return -EMSGSIZE;
456
457 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
458 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
459 if (!prop)
460 return -EMSGSIZE;
461 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
462 return -EMSGSIZE;
463 nla_nest_end(skb, prop);
464 }
465 nla_nest_end(skb, bearer);
466
467 return 0;
468 }
469
470 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
471 struct sk_buff *skb,
472 struct tipc_nl_compat_msg *msg)
473 {
474 char *name;
475 struct nlattr *bearer;
476 int len;
477
478 name = (char *)TLV_DATA(msg->req);
479
480 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
481 if (!bearer)
482 return -EMSGSIZE;
483
484 len = TLV_GET_DATA_LEN(msg->req);
485 if (len <= 0)
486 return -EINVAL;
487
488 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
489 if (!string_is_valid(name, len))
490 return -EINVAL;
491
492 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
493 return -EMSGSIZE;
494
495 nla_nest_end(skb, bearer);
496
497 return 0;
498 }
499
500 static inline u32 perc(u32 count, u32 total)
501 {
502 return (count * 100 + (total / 2)) / total;
503 }
504
505 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
506 struct nlattr *prop[], struct nlattr *stats[])
507 {
508 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
509 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
510
511 tipc_tlv_sprintf(msg->rep,
512 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
513 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
514 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
515 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
516 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
517 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
518
519 tipc_tlv_sprintf(msg->rep,
520 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
521 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
522 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
523 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
524 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
525 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
526
527 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
528 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
529 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
530 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
531
532 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
533 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
534 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
535 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
536
537 tipc_tlv_sprintf(msg->rep,
538 " Congestion link:%u Send queue max:%u avg:%u",
539 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
540 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
541 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
542 }
543
544 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
545 struct nlattr **attrs)
546 {
547 char *name;
548 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
549 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
550 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
551 int err;
552 int len;
553
554 if (!attrs[TIPC_NLA_LINK])
555 return -EINVAL;
556
557 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
558 attrs[TIPC_NLA_LINK], NULL, NULL);
559 if (err)
560 return err;
561
562 if (!link[TIPC_NLA_LINK_PROP])
563 return -EINVAL;
564
565 err = nla_parse_nested_deprecated(prop, TIPC_NLA_PROP_MAX,
566 link[TIPC_NLA_LINK_PROP], NULL,
567 NULL);
568 if (err)
569 return err;
570
571 if (!link[TIPC_NLA_LINK_STATS])
572 return -EINVAL;
573
574 err = nla_parse_nested_deprecated(stats, TIPC_NLA_STATS_MAX,
575 link[TIPC_NLA_LINK_STATS], NULL,
576 NULL);
577 if (err)
578 return err;
579
580 name = (char *)TLV_DATA(msg->req);
581
582 len = TLV_GET_DATA_LEN(msg->req);
583 if (len <= 0)
584 return -EINVAL;
585
586 len = min_t(int, len, TIPC_MAX_LINK_NAME);
587 if (!string_is_valid(name, len))
588 return -EINVAL;
589
590 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
591 return 0;
592
593 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
594 (char *)nla_data(link[TIPC_NLA_LINK_NAME]));
595
596 if (link[TIPC_NLA_LINK_BROADCAST]) {
597 __fill_bc_link_stat(msg, prop, stats);
598 return 0;
599 }
600
601 if (link[TIPC_NLA_LINK_ACTIVE])
602 tipc_tlv_sprintf(msg->rep, " ACTIVE");
603 else if (link[TIPC_NLA_LINK_UP])
604 tipc_tlv_sprintf(msg->rep, " STANDBY");
605 else
606 tipc_tlv_sprintf(msg->rep, " DEFUNCT");
607
608 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
609 nla_get_u32(link[TIPC_NLA_LINK_MTU]),
610 nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
611
612 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
613 nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
614 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
615
616 tipc_tlv_sprintf(msg->rep,
617 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
618 nla_get_u32(link[TIPC_NLA_LINK_RX]) -
619 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
620 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
621 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
622 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
623 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
624
625 tipc_tlv_sprintf(msg->rep,
626 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
627 nla_get_u32(link[TIPC_NLA_LINK_TX]) -
628 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
629 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
630 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
631 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
632 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
633
634 tipc_tlv_sprintf(msg->rep,
635 " TX profile sample:%u packets average:%u octets\n",
636 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
637 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
638 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
639
640 tipc_tlv_sprintf(msg->rep,
641 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
642 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
643 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
644 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
645 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
646 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
647 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
648 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
649 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
650
651 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
652 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
653 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
654 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
655 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
656 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
657 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
658
659 tipc_tlv_sprintf(msg->rep,
660 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
661 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
662 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
663 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
664 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
665 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
666
667 tipc_tlv_sprintf(msg->rep,
668 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
669 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
670 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
671 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
672 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
673 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
674
675 tipc_tlv_sprintf(msg->rep,
676 " Congestion link:%u Send queue max:%u avg:%u",
677 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
678 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
679 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
680
681 return 0;
682 }
683
684 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
685 struct nlattr **attrs)
686 {
687 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
688 struct tipc_link_info link_info;
689 int err;
690
691 if (!attrs[TIPC_NLA_LINK])
692 return -EINVAL;
693
694 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
695 attrs[TIPC_NLA_LINK], NULL, NULL);
696 if (err)
697 return err;
698
699 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
700 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
701 nla_strscpy(link_info.str, link[TIPC_NLA_LINK_NAME],
702 TIPC_MAX_LINK_NAME);
703
704 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
705 &link_info, sizeof(link_info));
706 }
707
708 static int __tipc_add_link_prop(struct sk_buff *skb,
709 struct tipc_nl_compat_msg *msg,
710 struct tipc_link_config *lc)
711 {
712 switch (msg->cmd) {
713 case TIPC_CMD_SET_LINK_PRI:
714 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
715 case TIPC_CMD_SET_LINK_TOL:
716 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
717 case TIPC_CMD_SET_LINK_WINDOW:
718 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
719 }
720
721 return -EINVAL;
722 }
723
724 static int tipc_nl_compat_media_set(struct sk_buff *skb,
725 struct tipc_nl_compat_msg *msg)
726 {
727 struct nlattr *prop;
728 struct nlattr *media;
729 struct tipc_link_config *lc;
730
731 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
732
733 media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA);
734 if (!media)
735 return -EMSGSIZE;
736
737 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
738 return -EMSGSIZE;
739
740 prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_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, media);
747
748 return 0;
749 }
750
751 static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
752 struct tipc_nl_compat_msg *msg)
753 {
754 struct nlattr *prop;
755 struct nlattr *bearer;
756 struct tipc_link_config *lc;
757
758 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
759
760 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
761 if (!bearer)
762 return -EMSGSIZE;
763
764 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
765 return -EMSGSIZE;
766
767 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
768 if (!prop)
769 return -EMSGSIZE;
770
771 __tipc_add_link_prop(skb, msg, lc);
772 nla_nest_end(skb, prop);
773 nla_nest_end(skb, bearer);
774
775 return 0;
776 }
777
778 static int __tipc_nl_compat_link_set(struct sk_buff *skb,
779 struct tipc_nl_compat_msg *msg)
780 {
781 struct nlattr *prop;
782 struct nlattr *link;
783 struct tipc_link_config *lc;
784
785 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
786
787 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
788 if (!link)
789 return -EMSGSIZE;
790
791 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
792 return -EMSGSIZE;
793
794 prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP);
795 if (!prop)
796 return -EMSGSIZE;
797
798 __tipc_add_link_prop(skb, msg, lc);
799 nla_nest_end(skb, prop);
800 nla_nest_end(skb, link);
801
802 return 0;
803 }
804
805 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
806 struct sk_buff *skb,
807 struct tipc_nl_compat_msg *msg)
808 {
809 struct tipc_link_config *lc;
810 struct tipc_bearer *bearer;
811 struct tipc_media *media;
812 int len;
813
814 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
815
816 len = TLV_GET_DATA_LEN(msg->req);
817 len -= offsetof(struct tipc_link_config, name);
818 if (len <= 0)
819 return -EINVAL;
820
821 len = min_t(int, len, TIPC_MAX_LINK_NAME);
822 if (!string_is_valid(lc->name, len))
823 return -EINVAL;
824
825 media = tipc_media_find(lc->name);
826 if (media) {
827 cmd->doit = &__tipc_nl_media_set;
828 return tipc_nl_compat_media_set(skb, msg);
829 }
830
831 bearer = tipc_bearer_find(msg->net, lc->name);
832 if (bearer) {
833 cmd->doit = &__tipc_nl_bearer_set;
834 return tipc_nl_compat_bearer_set(skb, msg);
835 }
836
837 return __tipc_nl_compat_link_set(skb, msg);
838 }
839
840 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
841 struct sk_buff *skb,
842 struct tipc_nl_compat_msg *msg)
843 {
844 char *name;
845 struct nlattr *link;
846 int len;
847
848 name = (char *)TLV_DATA(msg->req);
849
850 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
851 if (!link)
852 return -EMSGSIZE;
853
854 len = TLV_GET_DATA_LEN(msg->req);
855 if (len <= 0)
856 return -EINVAL;
857
858 len = min_t(int, len, TIPC_MAX_LINK_NAME);
859 if (!string_is_valid(name, len))
860 return -EINVAL;
861
862 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
863 return -EMSGSIZE;
864
865 nla_nest_end(skb, link);
866
867 return 0;
868 }
869
870 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
871 {
872 int i;
873 u32 depth;
874 struct tipc_name_table_query *ntq;
875 static const char * const header[] = {
876 "Type ",
877 "Lower Upper ",
878 "Port Identity ",
879 "Publication Scope"
880 };
881
882 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
883 if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query))
884 return -EINVAL;
885
886 depth = ntohl(ntq->depth);
887
888 if (depth > 4)
889 depth = 4;
890 for (i = 0; i < depth; i++)
891 tipc_tlv_sprintf(msg->rep, header[i]);
892 tipc_tlv_sprintf(msg->rep, "\n");
893
894 return 0;
895 }
896
897 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
898 struct nlattr **attrs)
899 {
900 char port_str[27];
901 struct tipc_name_table_query *ntq;
902 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
903 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
904 u32 node, depth, type, lowbound, upbound;
905 static const char * const scope_str[] = {"", " zone", " cluster",
906 " node"};
907 int err;
908
909 if (!attrs[TIPC_NLA_NAME_TABLE])
910 return -EINVAL;
911
912 err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX,
913 attrs[TIPC_NLA_NAME_TABLE], NULL,
914 NULL);
915 if (err)
916 return err;
917
918 if (!nt[TIPC_NLA_NAME_TABLE_PUBL])
919 return -EINVAL;
920
921 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
922 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL,
923 NULL);
924 if (err)
925 return err;
926
927 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
928
929 depth = ntohl(ntq->depth);
930 type = ntohl(ntq->type);
931 lowbound = ntohl(ntq->lowbound);
932 upbound = ntohl(ntq->upbound);
933
934 if (!(depth & TIPC_NTQ_ALLTYPES) &&
935 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
936 return 0;
937 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
938 return 0;
939 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
940 return 0;
941
942 tipc_tlv_sprintf(msg->rep, "%-10u ",
943 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
944
945 if (depth == 1)
946 goto out;
947
948 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
949 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
950 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
951
952 if (depth == 2)
953 goto out;
954
955 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
956 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
957 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
958 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
959
960 if (depth == 3)
961 goto out;
962
963 tipc_tlv_sprintf(msg->rep, "%-10u %s",
964 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
965 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
966 out:
967 tipc_tlv_sprintf(msg->rep, "\n");
968
969 return 0;
970 }
971
972 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
973 struct nlattr **attrs)
974 {
975 u32 type, lower, upper;
976 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
977 int err;
978
979 if (!attrs[TIPC_NLA_PUBL])
980 return -EINVAL;
981
982 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
983 attrs[TIPC_NLA_PUBL], NULL, NULL);
984 if (err)
985 return err;
986
987 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
988 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
989 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
990
991 if (lower == upper)
992 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
993 else
994 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
995
996 return 0;
997 }
998
999 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
1000 {
1001 int err;
1002 void *hdr;
1003 struct nlattr *nest;
1004 struct sk_buff *args;
1005 struct tipc_nl_compat_cmd_dump dump;
1006
1007 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1008 if (!args)
1009 return -ENOMEM;
1010
1011 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
1012 TIPC_NL_PUBL_GET);
1013 if (!hdr) {
1014 kfree_skb(args);
1015 return -EMSGSIZE;
1016 }
1017
1018 nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK);
1019 if (!nest) {
1020 kfree_skb(args);
1021 return -EMSGSIZE;
1022 }
1023
1024 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
1025 kfree_skb(args);
1026 return -EMSGSIZE;
1027 }
1028
1029 nla_nest_end(args, nest);
1030 genlmsg_end(args, hdr);
1031
1032 dump.dumpit = tipc_nl_publ_dump;
1033 dump.format = __tipc_nl_compat_publ_dump;
1034
1035 err = __tipc_nl_compat_dumpit(&dump, msg, args);
1036
1037 kfree_skb(args);
1038
1039 return err;
1040 }
1041
1042 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
1043 struct nlattr **attrs)
1044 {
1045 int err;
1046 u32 sock_ref;
1047 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
1048
1049 if (!attrs[TIPC_NLA_SOCK])
1050 return -EINVAL;
1051
1052 err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX,
1053 attrs[TIPC_NLA_SOCK], NULL, NULL);
1054 if (err)
1055 return err;
1056
1057 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
1058 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
1059
1060 if (sock[TIPC_NLA_SOCK_CON]) {
1061 u32 node;
1062 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
1063
1064 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX,
1065 sock[TIPC_NLA_SOCK_CON],
1066 NULL, NULL);
1067
1068 if (err)
1069 return err;
1070
1071 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
1072 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>",
1073 tipc_zone(node),
1074 tipc_cluster(node),
1075 tipc_node(node),
1076 nla_get_u32(con[TIPC_NLA_CON_SOCK]));
1077
1078 if (con[TIPC_NLA_CON_FLAG])
1079 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
1080 nla_get_u32(con[TIPC_NLA_CON_TYPE]),
1081 nla_get_u32(con[TIPC_NLA_CON_INST]));
1082 else
1083 tipc_tlv_sprintf(msg->rep, "\n");
1084 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
1085 tipc_tlv_sprintf(msg->rep, " bound to");
1086
1087 err = tipc_nl_compat_publ_dump(msg, sock_ref);
1088 if (err)
1089 return err;
1090 }
1091 tipc_tlv_sprintf(msg->rep, "\n");
1092
1093 return 0;
1094 }
1095
1096 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
1097 struct nlattr **attrs)
1098 {
1099 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
1100 int err;
1101
1102 if (!attrs[TIPC_NLA_MEDIA])
1103 return -EINVAL;
1104
1105 err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX,
1106 attrs[TIPC_NLA_MEDIA], NULL, NULL);
1107 if (err)
1108 return err;
1109
1110 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
1111 nla_data(media[TIPC_NLA_MEDIA_NAME]),
1112 nla_len(media[TIPC_NLA_MEDIA_NAME]));
1113 }
1114
1115 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
1116 struct nlattr **attrs)
1117 {
1118 struct tipc_node_info node_info;
1119 struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
1120 int err;
1121
1122 if (!attrs[TIPC_NLA_NODE])
1123 return -EINVAL;
1124
1125 err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX,
1126 attrs[TIPC_NLA_NODE], NULL, NULL);
1127 if (err)
1128 return err;
1129
1130 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1131 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1132
1133 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1134 sizeof(node_info));
1135 }
1136
1137 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1138 struct sk_buff *skb,
1139 struct tipc_nl_compat_msg *msg)
1140 {
1141 u32 val;
1142 struct nlattr *net;
1143
1144 val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1145
1146 net = nla_nest_start_noflag(skb, TIPC_NLA_NET);
1147 if (!net)
1148 return -EMSGSIZE;
1149
1150 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1151 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1152 return -EMSGSIZE;
1153 } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1154 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1155 return -EMSGSIZE;
1156 }
1157 nla_nest_end(skb, net);
1158
1159 return 0;
1160 }
1161
1162 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1163 struct nlattr **attrs)
1164 {
1165 __be32 id;
1166 struct nlattr *net[TIPC_NLA_NET_MAX + 1];
1167 int err;
1168
1169 if (!attrs[TIPC_NLA_NET])
1170 return -EINVAL;
1171
1172 err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX,
1173 attrs[TIPC_NLA_NET], NULL, NULL);
1174 if (err)
1175 return err;
1176
1177 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1178
1179 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1180 }
1181
1182 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1183 {
1184 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1185 if (!msg->rep)
1186 return -ENOMEM;
1187
1188 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1189 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1190
1191 return 0;
1192 }
1193
1194 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1195 {
1196 struct tipc_nl_compat_cmd_dump dump;
1197 struct tipc_nl_compat_cmd_doit doit;
1198
1199 memset(&dump, 0, sizeof(dump));
1200 memset(&doit, 0, sizeof(doit));
1201
1202 switch (msg->cmd) {
1203 case TIPC_CMD_NOOP:
1204 msg->rep = tipc_tlv_alloc(0);
1205 if (!msg->rep)
1206 return -ENOMEM;
1207 return 0;
1208 case TIPC_CMD_GET_BEARER_NAMES:
1209 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1210 dump.dumpit = tipc_nl_bearer_dump;
1211 dump.format = tipc_nl_compat_bearer_dump;
1212 return tipc_nl_compat_dumpit(&dump, msg);
1213 case TIPC_CMD_ENABLE_BEARER:
1214 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1215 doit.doit = __tipc_nl_bearer_enable;
1216 doit.transcode = tipc_nl_compat_bearer_enable;
1217 return tipc_nl_compat_doit(&doit, msg);
1218 case TIPC_CMD_DISABLE_BEARER:
1219 msg->req_type = TIPC_TLV_BEARER_NAME;
1220 doit.doit = __tipc_nl_bearer_disable;
1221 doit.transcode = tipc_nl_compat_bearer_disable;
1222 return tipc_nl_compat_doit(&doit, msg);
1223 case TIPC_CMD_SHOW_LINK_STATS:
1224 msg->req_type = TIPC_TLV_LINK_NAME;
1225 msg->rep_size = ULTRA_STRING_MAX_LEN;
1226 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1227 dump.dumpit = tipc_nl_node_dump_link;
1228 dump.format = tipc_nl_compat_link_stat_dump;
1229 return tipc_nl_compat_dumpit(&dump, msg);
1230 case TIPC_CMD_GET_LINKS:
1231 msg->req_type = TIPC_TLV_NET_ADDR;
1232 msg->rep_size = ULTRA_STRING_MAX_LEN;
1233 dump.dumpit = tipc_nl_node_dump_link;
1234 dump.format = tipc_nl_compat_link_dump;
1235 return tipc_nl_compat_dumpit(&dump, msg);
1236 case TIPC_CMD_SET_LINK_TOL:
1237 case TIPC_CMD_SET_LINK_PRI:
1238 case TIPC_CMD_SET_LINK_WINDOW:
1239 msg->req_type = TIPC_TLV_LINK_CONFIG;
1240 doit.doit = tipc_nl_node_set_link;
1241 doit.transcode = tipc_nl_compat_link_set;
1242 return tipc_nl_compat_doit(&doit, msg);
1243 case TIPC_CMD_RESET_LINK_STATS:
1244 msg->req_type = TIPC_TLV_LINK_NAME;
1245 doit.doit = tipc_nl_node_reset_link_stats;
1246 doit.transcode = tipc_nl_compat_link_reset_stats;
1247 return tipc_nl_compat_doit(&doit, msg);
1248 case TIPC_CMD_SHOW_NAME_TABLE:
1249 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1250 msg->rep_size = ULTRA_STRING_MAX_LEN;
1251 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1252 dump.header = tipc_nl_compat_name_table_dump_header;
1253 dump.dumpit = tipc_nl_name_table_dump;
1254 dump.format = tipc_nl_compat_name_table_dump;
1255 return tipc_nl_compat_dumpit(&dump, msg);
1256 case TIPC_CMD_SHOW_PORTS:
1257 msg->rep_size = ULTRA_STRING_MAX_LEN;
1258 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1259 dump.dumpit = tipc_nl_sk_dump;
1260 dump.format = tipc_nl_compat_sk_dump;
1261 return tipc_nl_compat_dumpit(&dump, msg);
1262 case TIPC_CMD_GET_MEDIA_NAMES:
1263 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1264 dump.dumpit = tipc_nl_media_dump;
1265 dump.format = tipc_nl_compat_media_dump;
1266 return tipc_nl_compat_dumpit(&dump, msg);
1267 case TIPC_CMD_GET_NODES:
1268 msg->rep_size = ULTRA_STRING_MAX_LEN;
1269 dump.dumpit = tipc_nl_node_dump;
1270 dump.format = tipc_nl_compat_node_dump;
1271 return tipc_nl_compat_dumpit(&dump, msg);
1272 case TIPC_CMD_SET_NODE_ADDR:
1273 msg->req_type = TIPC_TLV_NET_ADDR;
1274 doit.doit = __tipc_nl_net_set;
1275 doit.transcode = tipc_nl_compat_net_set;
1276 return tipc_nl_compat_doit(&doit, msg);
1277 case TIPC_CMD_SET_NETID:
1278 msg->req_type = TIPC_TLV_UNSIGNED;
1279 doit.doit = __tipc_nl_net_set;
1280 doit.transcode = tipc_nl_compat_net_set;
1281 return tipc_nl_compat_doit(&doit, msg);
1282 case TIPC_CMD_GET_NETID:
1283 msg->rep_size = sizeof(u32);
1284 dump.dumpit = tipc_nl_net_dump;
1285 dump.format = tipc_nl_compat_net_dump;
1286 return tipc_nl_compat_dumpit(&dump, msg);
1287 case TIPC_CMD_SHOW_STATS:
1288 return tipc_cmd_show_stats_compat(msg);
1289 }
1290
1291 return -EOPNOTSUPP;
1292 }
1293
1294 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1295 {
1296 int err;
1297 int len;
1298 struct tipc_nl_compat_msg msg;
1299 struct nlmsghdr *req_nlh;
1300 struct nlmsghdr *rep_nlh;
1301 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1302
1303 memset(&msg, 0, sizeof(msg));
1304
1305 req_nlh = (struct nlmsghdr *)skb->data;
1306 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1307 msg.cmd = req_userhdr->cmd;
1308 msg.net = genl_info_net(info);
1309 msg.dst_sk = skb->sk;
1310
1311 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1312 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1313 err = -EACCES;
1314 goto send;
1315 }
1316
1317 msg.req_size = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1318 if (msg.req_size && !TLV_OK(msg.req, msg.req_size)) {
1319 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1320 err = -EOPNOTSUPP;
1321 goto send;
1322 }
1323
1324 err = tipc_nl_compat_handle(&msg);
1325 if ((err == -EOPNOTSUPP) || (err == -EPERM))
1326 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1327 else if (err == -EINVAL)
1328 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1329 send:
1330 if (!msg.rep)
1331 return err;
1332
1333 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1334 skb_push(msg.rep, len);
1335 rep_nlh = nlmsg_hdr(msg.rep);
1336 memcpy(rep_nlh, info->nlhdr, len);
1337 rep_nlh->nlmsg_len = msg.rep->len;
1338 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
1339
1340 return err;
1341 }
1342
1343 static const struct genl_small_ops tipc_genl_compat_ops[] = {
1344 {
1345 .cmd = TIPC_GENL_CMD,
1346 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1347 .doit = tipc_nl_compat_recv,
1348 },
1349 };
1350
1351 static struct genl_family tipc_genl_compat_family __ro_after_init = {
1352 .name = TIPC_GENL_NAME,
1353 .version = TIPC_GENL_VERSION,
1354 .hdrsize = TIPC_GENL_HDRLEN,
1355 .maxattr = 0,
1356 .netnsok = true,
1357 .module = THIS_MODULE,
1358 .small_ops = tipc_genl_compat_ops,
1359 .n_small_ops = ARRAY_SIZE(tipc_genl_compat_ops),
1360 };
1361
1362 int __init tipc_netlink_compat_start(void)
1363 {
1364 int res;
1365
1366 res = genl_register_family(&tipc_genl_compat_family);
1367 if (res) {
1368 pr_err("Failed to register legacy compat interface\n");
1369 return res;
1370 }
1371
1372 return 0;
1373 }
1374
1375 void tipc_netlink_compat_stop(void)
1376 {
1377 genl_unregister_family(&tipc_genl_compat_family);
1378 }
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