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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/string_helpers.h>
43#include <linux/tipc_config.h>
44
45/* The legacy API had an artificial message length limit called
46 * ULTRA_STRING_MAX_LEN.
47 */
48#define ULTRA_STRING_MAX_LEN 32768
49
50#define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN)
51
52#define REPLY_TRUNCATED "<truncated>\n"
53
54struct tipc_nl_compat_msg {
55 u16 cmd;
56 int rep_type;
57 int rep_size;
58 int req_type;
59 int req_size;
60 struct net *net;
61 struct sk_buff *rep;
62 struct tlv_desc *req;
63 struct sock *dst_sk;
64};
65
66struct tipc_nl_compat_cmd_dump {
67 int (*header)(struct tipc_nl_compat_msg *);
68 int (*dumpit)(struct sk_buff *, struct netlink_callback *);
69 int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
70};
71
72struct tipc_nl_compat_cmd_doit {
73 int (*doit)(struct sk_buff *skb, struct genl_info *info);
74 int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd,
75 struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
76};
77
78static int tipc_skb_tailroom(struct sk_buff *skb)
79{
80 int tailroom;
81 int limit;
82
83 tailroom = skb_tailroom(skb);
84 limit = TIPC_SKB_MAX - skb->len;
85
86 if (tailroom < limit)
87 return tailroom;
88
89 return limit;
90}
91
92static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv)
93{
94 return TLV_GET_LEN(tlv) - TLV_SPACE(0);
95}
96
97static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len)
98{
99 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb);
100
101 if (tipc_skb_tailroom(skb) < TLV_SPACE(len))
102 return -EMSGSIZE;
103
104 skb_put(skb, TLV_SPACE(len));
105 memset(tlv, 0, TLV_SPACE(len));
106 tlv->tlv_type = htons(type);
107 tlv->tlv_len = htons(TLV_LENGTH(len));
108 if (len && data)
109 memcpy(TLV_DATA(tlv), data, len);
110
111 return 0;
112}
113
114static void tipc_tlv_init(struct sk_buff *skb, u16 type)
115{
116 struct tlv_desc *tlv = (struct tlv_desc *)skb->data;
117
118 TLV_SET_LEN(tlv, 0);
119 TLV_SET_TYPE(tlv, type);
120 skb_put(skb, sizeof(struct tlv_desc));
121}
122
123static __printf(2, 3) int tipc_tlv_sprintf(struct sk_buff *skb,
124 const char *fmt, ...)
125{
126 int n;
127 u16 len;
128 u32 rem;
129 char *buf;
130 struct tlv_desc *tlv;
131 va_list args;
132
133 rem = tipc_skb_tailroom(skb);
134
135 tlv = (struct tlv_desc *)skb->data;
136 len = TLV_GET_LEN(tlv);
137 buf = TLV_DATA(tlv) + len;
138
139 va_start(args, fmt);
140 n = vscnprintf(buf, rem, fmt, args);
141 va_end(args);
142
143 TLV_SET_LEN(tlv, n + len);
144 skb_put(skb, n);
145
146 return n;
147}
148
149static struct sk_buff *tipc_tlv_alloc(int size)
150{
151 int hdr_len;
152 struct sk_buff *buf;
153
154 size = TLV_SPACE(size);
155 hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
156
157 buf = alloc_skb(hdr_len + size, GFP_KERNEL);
158 if (!buf)
159 return NULL;
160
161 skb_reserve(buf, hdr_len);
162
163 return buf;
164}
165
166static struct sk_buff *tipc_get_err_tlv(char *str)
167{
168 int str_len = strlen(str) + 1;
169 struct sk_buff *buf;
170
171 buf = tipc_tlv_alloc(str_len);
172 if (buf)
173 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
174
175 return buf;
176}
177
178static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
179 struct tipc_nl_compat_msg *msg,
180 struct sk_buff *arg)
181{
182 struct genl_dumpit_info info;
183 int len = 0;
184 int err;
185 struct sk_buff *buf;
186 struct nlmsghdr *nlmsg;
187 struct netlink_callback cb;
188 struct nlattr **attrbuf;
189
190 memset(&cb, 0, sizeof(cb));
191 cb.nlh = (struct nlmsghdr *)arg->data;
192 cb.skb = arg;
193 cb.data = &info;
194
195 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
196 if (!buf)
197 return -ENOMEM;
198
199 buf->sk = msg->dst_sk;
200 if (__tipc_dump_start(&cb, msg->net)) {
201 kfree_skb(buf);
202 return -ENOMEM;
203 }
204
205 attrbuf = kzalloc_objs(struct nlattr *, tipc_genl_family.maxattr + 1);
206 if (!attrbuf) {
207 err = -ENOMEM;
208 goto err_out;
209 }
210
211 info.info.attrs = attrbuf;
212
213 if (nlmsg_len(cb.nlh) > 0) {
214 err = nlmsg_parse_deprecated(cb.nlh, GENL_HDRLEN, attrbuf,
215 tipc_genl_family.maxattr,
216 tipc_genl_family.policy, NULL);
217 if (err)
218 goto err_out;
219 }
220 do {
221 int rem;
222
223 len = (*cmd->dumpit)(buf, &cb);
224 if (len < 0) {
225 err = len;
226 goto err_out;
227 }
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
255err_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
278static 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
331static 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_objs(struct nlattr *, tipc_genl_family.maxattr + 1);
345 if (!attrbuf) {
346 err = -ENOMEM;
347 goto trans_out;
348 }
349
350 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
351 if (!doit_buf) {
352 err = -ENOMEM;
353 goto attrbuf_out;
354 }
355
356 memset(&info, 0, sizeof(info));
357 info.attrs = attrbuf;
358
359 rtnl_lock();
360 err = (*cmd->transcode)(cmd, trans_buf, msg);
361 if (err)
362 goto doit_out;
363
364 err = nla_parse_deprecated(attrbuf, tipc_genl_family.maxattr,
365 (const struct nlattr *)trans_buf->data,
366 trans_buf->len, NULL, NULL);
367 if (err)
368 goto doit_out;
369
370 doit_buf->sk = msg->dst_sk;
371
372 err = (*cmd->doit)(doit_buf, &info);
373doit_out:
374 rtnl_unlock();
375
376 kfree_skb(doit_buf);
377attrbuf_out:
378 kfree(attrbuf);
379trans_out:
380 kfree_skb(trans_buf);
381
382 return err;
383}
384
385static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
386 struct tipc_nl_compat_msg *msg)
387{
388 int err;
389
390 if (msg->req_type && (!msg->req_size ||
391 !TLV_CHECK_TYPE(msg->req, msg->req_type)))
392 return -EINVAL;
393
394 err = __tipc_nl_compat_doit(cmd, msg);
395 if (err)
396 return err;
397
398 /* The legacy API considered an empty message a success message */
399 msg->rep = tipc_tlv_alloc(0);
400 if (!msg->rep)
401 return -ENOMEM;
402
403 return 0;
404}
405
406static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
407 struct nlattr **attrs)
408{
409 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
410 int err;
411
412 if (!attrs[TIPC_NLA_BEARER])
413 return -EINVAL;
414
415 err = nla_parse_nested_deprecated(bearer, TIPC_NLA_BEARER_MAX,
416 attrs[TIPC_NLA_BEARER], NULL, NULL);
417 if (err)
418 return err;
419
420 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
421 nla_data(bearer[TIPC_NLA_BEARER_NAME]),
422 nla_len(bearer[TIPC_NLA_BEARER_NAME]));
423}
424
425static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
426 struct sk_buff *skb,
427 struct tipc_nl_compat_msg *msg)
428{
429 struct nlattr *prop;
430 struct nlattr *bearer;
431 struct tipc_bearer_config *b;
432 int len;
433
434 b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
435
436 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
437 if (!bearer)
438 return -EMSGSIZE;
439
440 len = TLV_GET_DATA_LEN(msg->req);
441 len -= offsetof(struct tipc_bearer_config, name);
442 if (len <= 0)
443 return -EINVAL;
444
445 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
446 if (!string_is_terminated(b->name, len))
447 return -EINVAL;
448
449 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
450 return -EMSGSIZE;
451
452 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
453 return -EMSGSIZE;
454
455 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
456 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
457 if (!prop)
458 return -EMSGSIZE;
459 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
460 return -EMSGSIZE;
461 nla_nest_end(skb, prop);
462 }
463 nla_nest_end(skb, bearer);
464
465 return 0;
466}
467
468static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
469 struct sk_buff *skb,
470 struct tipc_nl_compat_msg *msg)
471{
472 char *name;
473 struct nlattr *bearer;
474 int len;
475
476 name = (char *)TLV_DATA(msg->req);
477
478 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
479 if (!bearer)
480 return -EMSGSIZE;
481
482 len = TLV_GET_DATA_LEN(msg->req);
483 if (len <= 0)
484 return -EINVAL;
485
486 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
487 if (!string_is_terminated(name, len))
488 return -EINVAL;
489
490 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
491 return -EMSGSIZE;
492
493 nla_nest_end(skb, bearer);
494
495 return 0;
496}
497
498static inline u32 perc(u32 count, u32 total)
499{
500 return (count * 100 + (total / 2)) / total;
501}
502
503static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
504 struct nlattr *prop[], struct nlattr *stats[])
505{
506 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
507 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
508
509 tipc_tlv_sprintf(msg->rep,
510 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
511 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
512 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
513 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
514 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
515 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
516
517 tipc_tlv_sprintf(msg->rep,
518 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
519 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
520 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
521 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
522 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
523 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
524
525 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
526 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
527 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
528 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
529
530 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
531 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
532 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
533 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
534
535 tipc_tlv_sprintf(msg->rep,
536 " Congestion link:%u Send queue max:%u avg:%u",
537 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
538 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
539 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
540}
541
542static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
543 struct nlattr **attrs)
544{
545 char *name;
546 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
547 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
548 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
549 int err;
550 int len;
551
552 if (!attrs[TIPC_NLA_LINK])
553 return -EINVAL;
554
555 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
556 attrs[TIPC_NLA_LINK], NULL, NULL);
557 if (err)
558 return err;
559
560 if (!link[TIPC_NLA_LINK_PROP])
561 return -EINVAL;
562
563 err = nla_parse_nested_deprecated(prop, TIPC_NLA_PROP_MAX,
564 link[TIPC_NLA_LINK_PROP], NULL,
565 NULL);
566 if (err)
567 return err;
568
569 if (!link[TIPC_NLA_LINK_STATS])
570 return -EINVAL;
571
572 err = nla_parse_nested_deprecated(stats, TIPC_NLA_STATS_MAX,
573 link[TIPC_NLA_LINK_STATS], NULL,
574 NULL);
575 if (err)
576 return err;
577
578 name = (char *)TLV_DATA(msg->req);
579
580 len = TLV_GET_DATA_LEN(msg->req);
581 if (len <= 0)
582 return -EINVAL;
583
584 len = min_t(int, len, TIPC_MAX_LINK_NAME);
585 if (!string_is_terminated(name, len))
586 return -EINVAL;
587
588 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
589 return 0;
590
591 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
592 (char *)nla_data(link[TIPC_NLA_LINK_NAME]));
593
594 if (link[TIPC_NLA_LINK_BROADCAST]) {
595 __fill_bc_link_stat(msg, prop, stats);
596 return 0;
597 }
598
599 if (link[TIPC_NLA_LINK_ACTIVE])
600 tipc_tlv_sprintf(msg->rep, " ACTIVE");
601 else if (link[TIPC_NLA_LINK_UP])
602 tipc_tlv_sprintf(msg->rep, " STANDBY");
603 else
604 tipc_tlv_sprintf(msg->rep, " DEFUNCT");
605
606 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
607 nla_get_u32(link[TIPC_NLA_LINK_MTU]),
608 nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
609
610 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
611 nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
612 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
613
614 tipc_tlv_sprintf(msg->rep,
615 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
616 nla_get_u32(link[TIPC_NLA_LINK_RX]) -
617 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
618 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
619 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
620 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
621 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
622
623 tipc_tlv_sprintf(msg->rep,
624 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
625 nla_get_u32(link[TIPC_NLA_LINK_TX]) -
626 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
627 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
628 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
629 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
630 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
631
632 tipc_tlv_sprintf(msg->rep,
633 " TX profile sample:%u packets average:%u octets\n",
634 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
635 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
636 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
637
638 tipc_tlv_sprintf(msg->rep,
639 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
640 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
641 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
642 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
643 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
644 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
645 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
646 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
647 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
648
649 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
650 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
651 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
652 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
653 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
654 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
655 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
656
657 tipc_tlv_sprintf(msg->rep,
658 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
659 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
660 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
661 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
662 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
663 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
664
665 tipc_tlv_sprintf(msg->rep,
666 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
667 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
668 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
669 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
670 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
671 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
672
673 tipc_tlv_sprintf(msg->rep,
674 " Congestion link:%u Send queue max:%u avg:%u",
675 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
676 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
677 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
678
679 return 0;
680}
681
682static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
683 struct nlattr **attrs)
684{
685 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
686 struct tipc_link_info link_info;
687 int err;
688
689 if (!attrs[TIPC_NLA_LINK])
690 return -EINVAL;
691
692 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
693 attrs[TIPC_NLA_LINK], NULL, NULL);
694 if (err)
695 return err;
696
697 link_info.dest = htonl(nla_get_flag(link[TIPC_NLA_LINK_DEST]));
698 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
699 nla_strscpy(link_info.str, link[TIPC_NLA_LINK_NAME],
700 TIPC_MAX_LINK_NAME);
701
702 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
703 &link_info, sizeof(link_info));
704}
705
706static int __tipc_add_link_prop(struct sk_buff *skb,
707 struct tipc_nl_compat_msg *msg,
708 struct tipc_link_config *lc)
709{
710 switch (msg->cmd) {
711 case TIPC_CMD_SET_LINK_PRI:
712 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
713 case TIPC_CMD_SET_LINK_TOL:
714 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
715 case TIPC_CMD_SET_LINK_WINDOW:
716 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
717 }
718
719 return -EINVAL;
720}
721
722static int tipc_nl_compat_media_set(struct sk_buff *skb,
723 struct tipc_nl_compat_msg *msg)
724{
725 struct nlattr *prop;
726 struct nlattr *media;
727 struct tipc_link_config *lc;
728
729 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
730
731 media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA);
732 if (!media)
733 return -EMSGSIZE;
734
735 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
736 return -EMSGSIZE;
737
738 prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_PROP);
739 if (!prop)
740 return -EMSGSIZE;
741
742 __tipc_add_link_prop(skb, msg, lc);
743 nla_nest_end(skb, prop);
744 nla_nest_end(skb, media);
745
746 return 0;
747}
748
749static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
750 struct tipc_nl_compat_msg *msg)
751{
752 struct nlattr *prop;
753 struct nlattr *bearer;
754 struct tipc_link_config *lc;
755
756 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
757
758 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
759 if (!bearer)
760 return -EMSGSIZE;
761
762 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
763 return -EMSGSIZE;
764
765 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
766 if (!prop)
767 return -EMSGSIZE;
768
769 __tipc_add_link_prop(skb, msg, lc);
770 nla_nest_end(skb, prop);
771 nla_nest_end(skb, bearer);
772
773 return 0;
774}
775
776static int __tipc_nl_compat_link_set(struct sk_buff *skb,
777 struct tipc_nl_compat_msg *msg)
778{
779 struct nlattr *prop;
780 struct nlattr *link;
781 struct tipc_link_config *lc;
782
783 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
784
785 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
786 if (!link)
787 return -EMSGSIZE;
788
789 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
790 return -EMSGSIZE;
791
792 prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP);
793 if (!prop)
794 return -EMSGSIZE;
795
796 __tipc_add_link_prop(skb, msg, lc);
797 nla_nest_end(skb, prop);
798 nla_nest_end(skb, link);
799
800 return 0;
801}
802
803static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
804 struct sk_buff *skb,
805 struct tipc_nl_compat_msg *msg)
806{
807 struct tipc_link_config *lc;
808 struct tipc_bearer *bearer;
809 struct tipc_media *media;
810 int len;
811
812 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
813
814 len = TLV_GET_DATA_LEN(msg->req);
815 len -= offsetof(struct tipc_link_config, name);
816 if (len <= 0)
817 return -EINVAL;
818
819 len = min_t(int, len, TIPC_MAX_LINK_NAME);
820 if (!string_is_terminated(lc->name, len))
821 return -EINVAL;
822
823 media = tipc_media_find(lc->name);
824 if (media) {
825 cmd->doit = &__tipc_nl_media_set;
826 return tipc_nl_compat_media_set(skb, msg);
827 }
828
829 bearer = tipc_bearer_find(msg->net, lc->name);
830 if (bearer) {
831 cmd->doit = &__tipc_nl_bearer_set;
832 return tipc_nl_compat_bearer_set(skb, msg);
833 }
834
835 return __tipc_nl_compat_link_set(skb, msg);
836}
837
838static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
839 struct sk_buff *skb,
840 struct tipc_nl_compat_msg *msg)
841{
842 char *name;
843 struct nlattr *link;
844 int len;
845
846 name = (char *)TLV_DATA(msg->req);
847
848 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
849 if (!link)
850 return -EMSGSIZE;
851
852 len = TLV_GET_DATA_LEN(msg->req);
853 if (len <= 0)
854 return -EINVAL;
855
856 len = min_t(int, len, TIPC_MAX_LINK_NAME);
857 if (!string_is_terminated(name, len))
858 return -EINVAL;
859
860 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
861 return -EMSGSIZE;
862
863 nla_nest_end(skb, link);
864
865 return 0;
866}
867
868static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
869{
870 int i;
871 u32 depth;
872 struct tipc_name_table_query *ntq;
873 static const char * const header[] = {
874 "Type ",
875 "Lower Upper ",
876 "Port Identity ",
877 "Publication Scope"
878 };
879
880 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
881 if (TLV_GET_DATA_LEN(msg->req) < (int)sizeof(struct tipc_name_table_query))
882 return -EINVAL;
883
884 depth = ntohl(ntq->depth);
885
886 if (depth > 4)
887 depth = 4;
888 for (i = 0; i < depth; i++)
889 tipc_tlv_sprintf(msg->rep, header[i]);
890 tipc_tlv_sprintf(msg->rep, "\n");
891
892 return 0;
893}
894
895static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
896 struct nlattr **attrs)
897{
898 char port_str[27];
899 struct tipc_name_table_query *ntq;
900 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
901 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
902 u32 node, depth, type, lowbound, upbound;
903 static const char * const scope_str[] = {"", " zone", " cluster",
904 " node"};
905 int err;
906
907 if (!attrs[TIPC_NLA_NAME_TABLE])
908 return -EINVAL;
909
910 err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX,
911 attrs[TIPC_NLA_NAME_TABLE], NULL,
912 NULL);
913 if (err)
914 return err;
915
916 if (!nt[TIPC_NLA_NAME_TABLE_PUBL])
917 return -EINVAL;
918
919 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
920 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL,
921 NULL);
922 if (err)
923 return err;
924
925 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
926
927 depth = ntohl(ntq->depth);
928 type = ntohl(ntq->type);
929 lowbound = ntohl(ntq->lowbound);
930 upbound = ntohl(ntq->upbound);
931
932 if (!(depth & TIPC_NTQ_ALLTYPES) &&
933 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
934 return 0;
935 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
936 return 0;
937 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
938 return 0;
939
940 tipc_tlv_sprintf(msg->rep, "%-10u ",
941 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
942
943 if (depth == 1)
944 goto out;
945
946 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
947 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
948 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
949
950 if (depth == 2)
951 goto out;
952
953 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
954 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
955 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
956 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
957
958 if (depth == 3)
959 goto out;
960
961 tipc_tlv_sprintf(msg->rep, "%-10u %s",
962 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
963 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
964out:
965 tipc_tlv_sprintf(msg->rep, "\n");
966
967 return 0;
968}
969
970static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
971 struct nlattr **attrs)
972{
973 u32 type, lower, upper;
974 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
975 int err;
976
977 if (!attrs[TIPC_NLA_PUBL])
978 return -EINVAL;
979
980 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
981 attrs[TIPC_NLA_PUBL], NULL, NULL);
982 if (err)
983 return err;
984
985 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
986 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
987 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
988
989 if (lower == upper)
990 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
991 else
992 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
993
994 return 0;
995}
996
997static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
998{
999 int err;
1000 void *hdr;
1001 struct nlattr *nest;
1002 struct sk_buff *args;
1003 struct tipc_nl_compat_cmd_dump dump;
1004
1005 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
1006 if (!args)
1007 return -ENOMEM;
1008
1009 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
1010 TIPC_NL_PUBL_GET);
1011 if (!hdr) {
1012 kfree_skb(args);
1013 return -EMSGSIZE;
1014 }
1015
1016 nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK);
1017 if (!nest) {
1018 kfree_skb(args);
1019 return -EMSGSIZE;
1020 }
1021
1022 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
1023 kfree_skb(args);
1024 return -EMSGSIZE;
1025 }
1026
1027 nla_nest_end(args, nest);
1028 genlmsg_end(args, hdr);
1029
1030 dump.dumpit = tipc_nl_publ_dump;
1031 dump.format = __tipc_nl_compat_publ_dump;
1032
1033 err = __tipc_nl_compat_dumpit(&dump, msg, args);
1034
1035 kfree_skb(args);
1036
1037 return err;
1038}
1039
1040static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
1041 struct nlattr **attrs)
1042{
1043 int err;
1044 u32 sock_ref;
1045 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
1046
1047 if (!attrs[TIPC_NLA_SOCK])
1048 return -EINVAL;
1049
1050 err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX,
1051 attrs[TIPC_NLA_SOCK], NULL, NULL);
1052 if (err)
1053 return err;
1054
1055 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
1056 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
1057
1058 if (sock[TIPC_NLA_SOCK_CON]) {
1059 u32 node;
1060 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
1061
1062 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX,
1063 sock[TIPC_NLA_SOCK_CON],
1064 NULL, NULL);
1065
1066 if (err)
1067 return err;
1068
1069 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
1070 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>",
1071 tipc_zone(node),
1072 tipc_cluster(node),
1073 tipc_node(node),
1074 nla_get_u32(con[TIPC_NLA_CON_SOCK]));
1075
1076 if (con[TIPC_NLA_CON_FLAG])
1077 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
1078 nla_get_u32(con[TIPC_NLA_CON_TYPE]),
1079 nla_get_u32(con[TIPC_NLA_CON_INST]));
1080 else
1081 tipc_tlv_sprintf(msg->rep, "\n");
1082 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
1083 tipc_tlv_sprintf(msg->rep, " bound to");
1084
1085 err = tipc_nl_compat_publ_dump(msg, sock_ref);
1086 if (err)
1087 return err;
1088 }
1089 tipc_tlv_sprintf(msg->rep, "\n");
1090
1091 return 0;
1092}
1093
1094static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
1095 struct nlattr **attrs)
1096{
1097 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
1098 int err;
1099
1100 if (!attrs[TIPC_NLA_MEDIA])
1101 return -EINVAL;
1102
1103 err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX,
1104 attrs[TIPC_NLA_MEDIA], NULL, NULL);
1105 if (err)
1106 return err;
1107
1108 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
1109 nla_data(media[TIPC_NLA_MEDIA_NAME]),
1110 nla_len(media[TIPC_NLA_MEDIA_NAME]));
1111}
1112
1113static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
1114 struct nlattr **attrs)
1115{
1116 struct tipc_node_info node_info;
1117 struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
1118 int err;
1119
1120 if (!attrs[TIPC_NLA_NODE])
1121 return -EINVAL;
1122
1123 err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX,
1124 attrs[TIPC_NLA_NODE], NULL, NULL);
1125 if (err)
1126 return err;
1127
1128 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1129 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1130
1131 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1132 sizeof(node_info));
1133}
1134
1135static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1136 struct sk_buff *skb,
1137 struct tipc_nl_compat_msg *msg)
1138{
1139 u32 val;
1140 struct nlattr *net;
1141
1142 val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1143
1144 net = nla_nest_start_noflag(skb, TIPC_NLA_NET);
1145 if (!net)
1146 return -EMSGSIZE;
1147
1148 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1149 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1150 return -EMSGSIZE;
1151 } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1152 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1153 return -EMSGSIZE;
1154 }
1155 nla_nest_end(skb, net);
1156
1157 return 0;
1158}
1159
1160static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1161 struct nlattr **attrs)
1162{
1163 __be32 id;
1164 struct nlattr *net[TIPC_NLA_NET_MAX + 1];
1165 int err;
1166
1167 if (!attrs[TIPC_NLA_NET])
1168 return -EINVAL;
1169
1170 err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX,
1171 attrs[TIPC_NLA_NET], NULL, NULL);
1172 if (err)
1173 return err;
1174
1175 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1176
1177 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1178}
1179
1180static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1181{
1182 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1183 if (!msg->rep)
1184 return -ENOMEM;
1185
1186 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1187 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1188
1189 return 0;
1190}
1191
1192static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1193{
1194 struct tipc_nl_compat_cmd_dump dump;
1195 struct tipc_nl_compat_cmd_doit doit;
1196
1197 memset(&dump, 0, sizeof(dump));
1198 memset(&doit, 0, sizeof(doit));
1199
1200 switch (msg->cmd) {
1201 case TIPC_CMD_NOOP:
1202 msg->rep = tipc_tlv_alloc(0);
1203 if (!msg->rep)
1204 return -ENOMEM;
1205 return 0;
1206 case TIPC_CMD_GET_BEARER_NAMES:
1207 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1208 dump.dumpit = tipc_nl_bearer_dump;
1209 dump.format = tipc_nl_compat_bearer_dump;
1210 return tipc_nl_compat_dumpit(&dump, msg);
1211 case TIPC_CMD_ENABLE_BEARER:
1212 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1213 doit.doit = __tipc_nl_bearer_enable;
1214 doit.transcode = tipc_nl_compat_bearer_enable;
1215 return tipc_nl_compat_doit(&doit, msg);
1216 case TIPC_CMD_DISABLE_BEARER:
1217 msg->req_type = TIPC_TLV_BEARER_NAME;
1218 doit.doit = __tipc_nl_bearer_disable;
1219 doit.transcode = tipc_nl_compat_bearer_disable;
1220 return tipc_nl_compat_doit(&doit, msg);
1221 case TIPC_CMD_SHOW_LINK_STATS:
1222 msg->req_type = TIPC_TLV_LINK_NAME;
1223 msg->rep_size = ULTRA_STRING_MAX_LEN;
1224 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1225 dump.dumpit = tipc_nl_node_dump_link;
1226 dump.format = tipc_nl_compat_link_stat_dump;
1227 return tipc_nl_compat_dumpit(&dump, msg);
1228 case TIPC_CMD_GET_LINKS:
1229 msg->req_type = TIPC_TLV_NET_ADDR;
1230 msg->rep_size = ULTRA_STRING_MAX_LEN;
1231 dump.dumpit = tipc_nl_node_dump_link;
1232 dump.format = tipc_nl_compat_link_dump;
1233 return tipc_nl_compat_dumpit(&dump, msg);
1234 case TIPC_CMD_SET_LINK_TOL:
1235 case TIPC_CMD_SET_LINK_PRI:
1236 case TIPC_CMD_SET_LINK_WINDOW:
1237 msg->req_type = TIPC_TLV_LINK_CONFIG;
1238 doit.doit = tipc_nl_node_set_link;
1239 doit.transcode = tipc_nl_compat_link_set;
1240 return tipc_nl_compat_doit(&doit, msg);
1241 case TIPC_CMD_RESET_LINK_STATS:
1242 msg->req_type = TIPC_TLV_LINK_NAME;
1243 doit.doit = tipc_nl_node_reset_link_stats;
1244 doit.transcode = tipc_nl_compat_link_reset_stats;
1245 return tipc_nl_compat_doit(&doit, msg);
1246 case TIPC_CMD_SHOW_NAME_TABLE:
1247 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1248 msg->rep_size = ULTRA_STRING_MAX_LEN;
1249 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1250 dump.header = tipc_nl_compat_name_table_dump_header;
1251 dump.dumpit = tipc_nl_name_table_dump;
1252 dump.format = tipc_nl_compat_name_table_dump;
1253 return tipc_nl_compat_dumpit(&dump, msg);
1254 case TIPC_CMD_SHOW_PORTS:
1255 msg->rep_size = ULTRA_STRING_MAX_LEN;
1256 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1257 dump.dumpit = tipc_nl_sk_dump;
1258 dump.format = tipc_nl_compat_sk_dump;
1259 return tipc_nl_compat_dumpit(&dump, msg);
1260 case TIPC_CMD_GET_MEDIA_NAMES:
1261 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1262 dump.dumpit = tipc_nl_media_dump;
1263 dump.format = tipc_nl_compat_media_dump;
1264 return tipc_nl_compat_dumpit(&dump, msg);
1265 case TIPC_CMD_GET_NODES:
1266 msg->rep_size = ULTRA_STRING_MAX_LEN;
1267 dump.dumpit = tipc_nl_node_dump;
1268 dump.format = tipc_nl_compat_node_dump;
1269 return tipc_nl_compat_dumpit(&dump, msg);
1270 case TIPC_CMD_SET_NODE_ADDR:
1271 msg->req_type = TIPC_TLV_NET_ADDR;
1272 doit.doit = __tipc_nl_net_set;
1273 doit.transcode = tipc_nl_compat_net_set;
1274 return tipc_nl_compat_doit(&doit, msg);
1275 case TIPC_CMD_SET_NETID:
1276 msg->req_type = TIPC_TLV_UNSIGNED;
1277 doit.doit = __tipc_nl_net_set;
1278 doit.transcode = tipc_nl_compat_net_set;
1279 return tipc_nl_compat_doit(&doit, msg);
1280 case TIPC_CMD_GET_NETID:
1281 msg->rep_size = sizeof(u32);
1282 dump.dumpit = tipc_nl_net_dump;
1283 dump.format = tipc_nl_compat_net_dump;
1284 return tipc_nl_compat_dumpit(&dump, msg);
1285 case TIPC_CMD_SHOW_STATS:
1286 return tipc_cmd_show_stats_compat(msg);
1287 }
1288
1289 return -EOPNOTSUPP;
1290}
1291
1292static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1293{
1294 int err;
1295 int len;
1296 struct tipc_nl_compat_msg msg;
1297 struct nlmsghdr *req_nlh;
1298 struct nlmsghdr *rep_nlh;
1299 struct tipc_genlmsghdr *req_userhdr = genl_info_userhdr(info);
1300
1301 memset(&msg, 0, sizeof(msg));
1302
1303 req_nlh = (struct nlmsghdr *)skb->data;
1304 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1305 msg.cmd = req_userhdr->cmd;
1306 msg.net = genl_info_net(info);
1307 msg.dst_sk = skb->sk;
1308
1309 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1310 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1311 err = -EACCES;
1312 goto send;
1313 }
1314
1315 msg.req_size = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1316 if (msg.req_size && !TLV_OK(msg.req, msg.req_size)) {
1317 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1318 err = -EOPNOTSUPP;
1319 goto send;
1320 }
1321
1322 err = tipc_nl_compat_handle(&msg);
1323 if ((err == -EOPNOTSUPP) || (err == -EPERM))
1324 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1325 else if (err == -EINVAL)
1326 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1327send:
1328 if (!msg.rep)
1329 return err;
1330
1331 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1332 skb_push(msg.rep, len);
1333 rep_nlh = nlmsg_hdr(msg.rep);
1334 memcpy(rep_nlh, info->nlhdr, len);
1335 rep_nlh->nlmsg_len = msg.rep->len;
1336 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
1337
1338 return err;
1339}
1340
1341static const struct genl_small_ops tipc_genl_compat_ops[] = {
1342 {
1343 .cmd = TIPC_GENL_CMD,
1344 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1345 .doit = tipc_nl_compat_recv,
1346 },
1347};
1348
1349static struct genl_family tipc_genl_compat_family __ro_after_init = {
1350 .name = TIPC_GENL_NAME,
1351 .version = TIPC_GENL_VERSION,
1352 .hdrsize = TIPC_GENL_HDRLEN,
1353 .maxattr = 0,
1354 .netnsok = true,
1355 .module = THIS_MODULE,
1356 .small_ops = tipc_genl_compat_ops,
1357 .n_small_ops = ARRAY_SIZE(tipc_genl_compat_ops),
1358 .resv_start_op = TIPC_GENL_CMD + 1,
1359};
1360
1361int __init tipc_netlink_compat_start(void)
1362{
1363 int res;
1364
1365 res = genl_register_family(&tipc_genl_compat_family);
1366 if (res) {
1367 pr_err("Failed to register legacy compat interface\n");
1368 return res;
1369 }
1370
1371 return 0;
1372}
1373
1374void tipc_netlink_compat_stop(void)
1375{
1376 genl_unregister_family(&tipc_genl_compat_family);
1377}