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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / net / tipc / netlink_compat.c
blob4492cda45566503627ad20a648524fdd59e3cbde
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 struct net *net;
59 struct sk_buff *rep;
60 struct tlv_desc *req;
61 struct sock *dst_sk;
62 };
63
64 struct 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
70 struct 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
76 static 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
90 static 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
106 static 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
115 static 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
140 static 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
157 static 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
169 static 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
218 err_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
239 static 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 msg->rep = NULL;
262 return -ENOMEM;
263 }
264
265 err = __tipc_nl_compat_dumpit(cmd, msg, arg);
266 if (err) {
267 kfree_skb(msg->rep);
268 msg->rep = NULL;
269 }
270 kfree_skb(arg);
271
272 return err;
273 }
274
275 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
276 struct tipc_nl_compat_msg *msg)
277 {
278 int err;
279 struct sk_buff *doit_buf;
280 struct sk_buff *trans_buf;
281 struct nlattr **attrbuf;
282 struct genl_info info;
283
284 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
285 if (!trans_buf)
286 return -ENOMEM;
287
288 attrbuf = kmalloc((tipc_genl_family.maxattr + 1) *
289 sizeof(struct nlattr *), GFP_KERNEL);
290 if (!attrbuf) {
291 err = -ENOMEM;
292 goto trans_out;
293 }
294
295 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
296 if (!doit_buf) {
297 err = -ENOMEM;
298 goto attrbuf_out;
299 }
300
301 memset(&info, 0, sizeof(info));
302 info.attrs = attrbuf;
303
304 rtnl_lock();
305 err = (*cmd->transcode)(cmd, trans_buf, msg);
306 if (err)
307 goto doit_out;
308
309 err = nla_parse(attrbuf, tipc_genl_family.maxattr,
310 (const struct nlattr *)trans_buf->data,
311 trans_buf->len, NULL, NULL);
312 if (err)
313 goto doit_out;
314
315 doit_buf->sk = msg->dst_sk;
316
317 err = (*cmd->doit)(doit_buf, &info);
318 doit_out:
319 rtnl_unlock();
320
321 kfree_skb(doit_buf);
322 attrbuf_out:
323 kfree(attrbuf);
324 trans_out:
325 kfree_skb(trans_buf);
326
327 return err;
328 }
329
330 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
331 struct tipc_nl_compat_msg *msg)
332 {
333 int err;
334
335 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
336 return -EINVAL;
337
338 err = __tipc_nl_compat_doit(cmd, msg);
339 if (err)
340 return err;
341
342 /* The legacy API considered an empty message a success message */
343 msg->rep = tipc_tlv_alloc(0);
344 if (!msg->rep)
345 return -ENOMEM;
346
347 return 0;
348 }
349
350 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
351 struct nlattr **attrs)
352 {
353 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
354 int err;
355
356 if (!attrs[TIPC_NLA_BEARER])
357 return -EINVAL;
358
359 err = nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX,
360 attrs[TIPC_NLA_BEARER], NULL, NULL);
361 if (err)
362 return err;
363
364 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
365 nla_data(bearer[TIPC_NLA_BEARER_NAME]),
366 nla_len(bearer[TIPC_NLA_BEARER_NAME]));
367 }
368
369 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
370 struct sk_buff *skb,
371 struct tipc_nl_compat_msg *msg)
372 {
373 struct nlattr *prop;
374 struct nlattr *bearer;
375 struct tipc_bearer_config *b;
376
377 b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
378
379 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
380 if (!bearer)
381 return -EMSGSIZE;
382
383 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
384 return -EMSGSIZE;
385
386 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
387 return -EMSGSIZE;
388
389 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
390 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
391 if (!prop)
392 return -EMSGSIZE;
393 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
394 return -EMSGSIZE;
395 nla_nest_end(skb, prop);
396 }
397 nla_nest_end(skb, bearer);
398
399 return 0;
400 }
401
402 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
403 struct sk_buff *skb,
404 struct tipc_nl_compat_msg *msg)
405 {
406 char *name;
407 struct nlattr *bearer;
408
409 name = (char *)TLV_DATA(msg->req);
410
411 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
412 if (!bearer)
413 return -EMSGSIZE;
414
415 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
416 return -EMSGSIZE;
417
418 nla_nest_end(skb, bearer);
419
420 return 0;
421 }
422
423 static inline u32 perc(u32 count, u32 total)
424 {
425 return (count * 100 + (total / 2)) / total;
426 }
427
428 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
429 struct nlattr *prop[], struct nlattr *stats[])
430 {
431 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
432 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
433
434 tipc_tlv_sprintf(msg->rep,
435 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
436 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
437 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
438 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
439 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
440 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
441
442 tipc_tlv_sprintf(msg->rep,
443 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
444 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
445 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
446 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
447 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
448 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
449
450 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
451 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
452 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
453 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
454
455 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
456 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
457 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
458 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
459
460 tipc_tlv_sprintf(msg->rep,
461 " Congestion link:%u Send queue max:%u avg:%u",
462 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
463 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
464 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
465 }
466
467 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
468 struct nlattr **attrs)
469 {
470 char *name;
471 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
472 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
473 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
474 int err;
475
476 if (!attrs[TIPC_NLA_LINK])
477 return -EINVAL;
478
479 err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK],
480 NULL, NULL);
481 if (err)
482 return err;
483
484 if (!link[TIPC_NLA_LINK_PROP])
485 return -EINVAL;
486
487 err = nla_parse_nested(prop, TIPC_NLA_PROP_MAX,
488 link[TIPC_NLA_LINK_PROP], NULL, NULL);
489 if (err)
490 return err;
491
492 if (!link[TIPC_NLA_LINK_STATS])
493 return -EINVAL;
494
495 err = nla_parse_nested(stats, TIPC_NLA_STATS_MAX,
496 link[TIPC_NLA_LINK_STATS], NULL, NULL);
497 if (err)
498 return err;
499
500 name = (char *)TLV_DATA(msg->req);
501 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
502 return 0;
503
504 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
505 nla_data(link[TIPC_NLA_LINK_NAME]));
506
507 if (link[TIPC_NLA_LINK_BROADCAST]) {
508 __fill_bc_link_stat(msg, prop, stats);
509 return 0;
510 }
511
512 if (link[TIPC_NLA_LINK_ACTIVE])
513 tipc_tlv_sprintf(msg->rep, " ACTIVE");
514 else if (link[TIPC_NLA_LINK_UP])
515 tipc_tlv_sprintf(msg->rep, " STANDBY");
516 else
517 tipc_tlv_sprintf(msg->rep, " DEFUNCT");
518
519 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
520 nla_get_u32(link[TIPC_NLA_LINK_MTU]),
521 nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
522
523 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
524 nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
525 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
526
527 tipc_tlv_sprintf(msg->rep,
528 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
529 nla_get_u32(link[TIPC_NLA_LINK_RX]) -
530 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
531 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
532 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
533 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
534 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
535
536 tipc_tlv_sprintf(msg->rep,
537 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
538 nla_get_u32(link[TIPC_NLA_LINK_TX]) -
539 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
540 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
541 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
542 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
543 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
544
545 tipc_tlv_sprintf(msg->rep,
546 " TX profile sample:%u packets average:%u octets\n",
547 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
548 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
549 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
550
551 tipc_tlv_sprintf(msg->rep,
552 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
553 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
554 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
555 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
556 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
557 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
558 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
559 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
560 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
561
562 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
563 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
564 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
565 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
566 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
567 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
568 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
569
570 tipc_tlv_sprintf(msg->rep,
571 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
572 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
573 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
574 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
575 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
576 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
577
578 tipc_tlv_sprintf(msg->rep,
579 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
580 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
581 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
582 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
583 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
584 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
585
586 tipc_tlv_sprintf(msg->rep,
587 " Congestion link:%u Send queue max:%u avg:%u",
588 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
589 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
590 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
591
592 return 0;
593 }
594
595 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
596 struct nlattr **attrs)
597 {
598 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
599 struct tipc_link_info link_info;
600 int err;
601
602 if (!attrs[TIPC_NLA_LINK])
603 return -EINVAL;
604
605 err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK],
606 NULL, NULL);
607 if (err)
608 return err;
609
610 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
611 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
612 nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME],
613 TIPC_MAX_LINK_NAME);
614
615 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
616 &link_info, sizeof(link_info));
617 }
618
619 static int __tipc_add_link_prop(struct sk_buff *skb,
620 struct tipc_nl_compat_msg *msg,
621 struct tipc_link_config *lc)
622 {
623 switch (msg->cmd) {
624 case TIPC_CMD_SET_LINK_PRI:
625 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
626 case TIPC_CMD_SET_LINK_TOL:
627 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
628 case TIPC_CMD_SET_LINK_WINDOW:
629 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
630 }
631
632 return -EINVAL;
633 }
634
635 static int tipc_nl_compat_media_set(struct sk_buff *skb,
636 struct tipc_nl_compat_msg *msg)
637 {
638 struct nlattr *prop;
639 struct nlattr *media;
640 struct tipc_link_config *lc;
641
642 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
643
644 media = nla_nest_start(skb, TIPC_NLA_MEDIA);
645 if (!media)
646 return -EMSGSIZE;
647
648 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
649 return -EMSGSIZE;
650
651 prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP);
652 if (!prop)
653 return -EMSGSIZE;
654
655 __tipc_add_link_prop(skb, msg, lc);
656 nla_nest_end(skb, prop);
657 nla_nest_end(skb, media);
658
659 return 0;
660 }
661
662 static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
663 struct tipc_nl_compat_msg *msg)
664 {
665 struct nlattr *prop;
666 struct nlattr *bearer;
667 struct tipc_link_config *lc;
668
669 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
670
671 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
672 if (!bearer)
673 return -EMSGSIZE;
674
675 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
676 return -EMSGSIZE;
677
678 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
679 if (!prop)
680 return -EMSGSIZE;
681
682 __tipc_add_link_prop(skb, msg, lc);
683 nla_nest_end(skb, prop);
684 nla_nest_end(skb, bearer);
685
686 return 0;
687 }
688
689 static int __tipc_nl_compat_link_set(struct sk_buff *skb,
690 struct tipc_nl_compat_msg *msg)
691 {
692 struct nlattr *prop;
693 struct nlattr *link;
694 struct tipc_link_config *lc;
695
696 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
697
698 link = nla_nest_start(skb, TIPC_NLA_LINK);
699 if (!link)
700 return -EMSGSIZE;
701
702 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
703 return -EMSGSIZE;
704
705 prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP);
706 if (!prop)
707 return -EMSGSIZE;
708
709 __tipc_add_link_prop(skb, msg, lc);
710 nla_nest_end(skb, prop);
711 nla_nest_end(skb, link);
712
713 return 0;
714 }
715
716 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
717 struct sk_buff *skb,
718 struct tipc_nl_compat_msg *msg)
719 {
720 struct tipc_link_config *lc;
721 struct tipc_bearer *bearer;
722 struct tipc_media *media;
723
724 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
725
726 media = tipc_media_find(lc->name);
727 if (media) {
728 cmd->doit = &__tipc_nl_media_set;
729 return tipc_nl_compat_media_set(skb, msg);
730 }
731
732 bearer = tipc_bearer_find(msg->net, lc->name);
733 if (bearer) {
734 cmd->doit = &__tipc_nl_bearer_set;
735 return tipc_nl_compat_bearer_set(skb, msg);
736 }
737
738 return __tipc_nl_compat_link_set(skb, msg);
739 }
740
741 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
742 struct sk_buff *skb,
743 struct tipc_nl_compat_msg *msg)
744 {
745 char *name;
746 struct nlattr *link;
747
748 name = (char *)TLV_DATA(msg->req);
749
750 link = nla_nest_start(skb, TIPC_NLA_LINK);
751 if (!link)
752 return -EMSGSIZE;
753
754 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
755 return -EMSGSIZE;
756
757 nla_nest_end(skb, link);
758
759 return 0;
760 }
761
762 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
763 {
764 int i;
765 u32 depth;
766 struct tipc_name_table_query *ntq;
767 static const char * const header[] = {
768 "Type ",
769 "Lower Upper ",
770 "Port Identity ",
771 "Publication Scope"
772 };
773
774 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
775
776 depth = ntohl(ntq->depth);
777
778 if (depth > 4)
779 depth = 4;
780 for (i = 0; i < depth; i++)
781 tipc_tlv_sprintf(msg->rep, header[i]);
782 tipc_tlv_sprintf(msg->rep, "\n");
783
784 return 0;
785 }
786
787 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
788 struct nlattr **attrs)
789 {
790 char port_str[27];
791 struct tipc_name_table_query *ntq;
792 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
793 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
794 u32 node, depth, type, lowbound, upbound;
795 static const char * const scope_str[] = {"", " zone", " cluster",
796 " node"};
797 int err;
798
799 if (!attrs[TIPC_NLA_NAME_TABLE])
800 return -EINVAL;
801
802 err = nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX,
803 attrs[TIPC_NLA_NAME_TABLE], NULL, NULL);
804 if (err)
805 return err;
806
807 if (!nt[TIPC_NLA_NAME_TABLE_PUBL])
808 return -EINVAL;
809
810 err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX,
811 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL, NULL);
812 if (err)
813 return err;
814
815 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
816
817 depth = ntohl(ntq->depth);
818 type = ntohl(ntq->type);
819 lowbound = ntohl(ntq->lowbound);
820 upbound = ntohl(ntq->upbound);
821
822 if (!(depth & TIPC_NTQ_ALLTYPES) &&
823 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
824 return 0;
825 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
826 return 0;
827 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
828 return 0;
829
830 tipc_tlv_sprintf(msg->rep, "%-10u ",
831 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
832
833 if (depth == 1)
834 goto out;
835
836 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
837 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
838 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
839
840 if (depth == 2)
841 goto out;
842
843 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
844 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
845 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
846 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
847
848 if (depth == 3)
849 goto out;
850
851 tipc_tlv_sprintf(msg->rep, "%-10u %s",
852 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
853 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
854 out:
855 tipc_tlv_sprintf(msg->rep, "\n");
856
857 return 0;
858 }
859
860 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
861 struct nlattr **attrs)
862 {
863 u32 type, lower, upper;
864 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
865 int err;
866
867 if (!attrs[TIPC_NLA_PUBL])
868 return -EINVAL;
869
870 err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL],
871 NULL, NULL);
872 if (err)
873 return err;
874
875 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
876 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
877 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
878
879 if (lower == upper)
880 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
881 else
882 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
883
884 return 0;
885 }
886
887 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
888 {
889 int err;
890 void *hdr;
891 struct nlattr *nest;
892 struct sk_buff *args;
893 struct tipc_nl_compat_cmd_dump dump;
894
895 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
896 if (!args)
897 return -ENOMEM;
898
899 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
900 TIPC_NL_PUBL_GET);
901
902 nest = nla_nest_start(args, TIPC_NLA_SOCK);
903 if (!nest) {
904 kfree_skb(args);
905 return -EMSGSIZE;
906 }
907
908 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
909 kfree_skb(args);
910 return -EMSGSIZE;
911 }
912
913 nla_nest_end(args, nest);
914 genlmsg_end(args, hdr);
915
916 dump.dumpit = tipc_nl_publ_dump;
917 dump.format = __tipc_nl_compat_publ_dump;
918
919 err = __tipc_nl_compat_dumpit(&dump, msg, args);
920
921 kfree_skb(args);
922
923 return err;
924 }
925
926 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
927 struct nlattr **attrs)
928 {
929 int err;
930 u32 sock_ref;
931 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
932
933 if (!attrs[TIPC_NLA_SOCK])
934 return -EINVAL;
935
936 err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK],
937 NULL, NULL);
938 if (err)
939 return err;
940
941 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
942 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
943
944 if (sock[TIPC_NLA_SOCK_CON]) {
945 u32 node;
946 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
947
948 nla_parse_nested(con, TIPC_NLA_CON_MAX,
949 sock[TIPC_NLA_SOCK_CON], NULL, NULL);
950
951 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
952 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>",
953 tipc_zone(node),
954 tipc_cluster(node),
955 tipc_node(node),
956 nla_get_u32(con[TIPC_NLA_CON_SOCK]));
957
958 if (con[TIPC_NLA_CON_FLAG])
959 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
960 nla_get_u32(con[TIPC_NLA_CON_TYPE]),
961 nla_get_u32(con[TIPC_NLA_CON_INST]));
962 else
963 tipc_tlv_sprintf(msg->rep, "\n");
964 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
965 tipc_tlv_sprintf(msg->rep, " bound to");
966
967 err = tipc_nl_compat_publ_dump(msg, sock_ref);
968 if (err)
969 return err;
970 }
971 tipc_tlv_sprintf(msg->rep, "\n");
972
973 return 0;
974 }
975
976 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
977 struct nlattr **attrs)
978 {
979 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
980 int err;
981
982 if (!attrs[TIPC_NLA_MEDIA])
983 return -EINVAL;
984
985 err = nla_parse_nested(media, TIPC_NLA_MEDIA_MAX,
986 attrs[TIPC_NLA_MEDIA], NULL, NULL);
987 if (err)
988 return err;
989
990 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
991 nla_data(media[TIPC_NLA_MEDIA_NAME]),
992 nla_len(media[TIPC_NLA_MEDIA_NAME]));
993 }
994
995 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
996 struct nlattr **attrs)
997 {
998 struct tipc_node_info node_info;
999 struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
1000 int err;
1001
1002 if (!attrs[TIPC_NLA_NODE])
1003 return -EINVAL;
1004
1005 err = nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE],
1006 NULL, NULL);
1007 if (err)
1008 return err;
1009
1010 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1011 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1012
1013 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1014 sizeof(node_info));
1015 }
1016
1017 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1018 struct sk_buff *skb,
1019 struct tipc_nl_compat_msg *msg)
1020 {
1021 u32 val;
1022 struct nlattr *net;
1023
1024 val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1025
1026 net = nla_nest_start(skb, TIPC_NLA_NET);
1027 if (!net)
1028 return -EMSGSIZE;
1029
1030 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1031 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1032 return -EMSGSIZE;
1033 } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1034 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1035 return -EMSGSIZE;
1036 }
1037 nla_nest_end(skb, net);
1038
1039 return 0;
1040 }
1041
1042 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1043 struct nlattr **attrs)
1044 {
1045 __be32 id;
1046 struct nlattr *net[TIPC_NLA_NET_MAX + 1];
1047 int err;
1048
1049 if (!attrs[TIPC_NLA_NET])
1050 return -EINVAL;
1051
1052 err = nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET],
1053 NULL, NULL);
1054 if (err)
1055 return err;
1056
1057 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1058
1059 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1060 }
1061
1062 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1063 {
1064 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1065 if (!msg->rep)
1066 return -ENOMEM;
1067
1068 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1069 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1070
1071 return 0;
1072 }
1073
1074 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1075 {
1076 struct tipc_nl_compat_cmd_dump dump;
1077 struct tipc_nl_compat_cmd_doit doit;
1078
1079 memset(&dump, 0, sizeof(dump));
1080 memset(&doit, 0, sizeof(doit));
1081
1082 switch (msg->cmd) {
1083 case TIPC_CMD_NOOP:
1084 msg->rep = tipc_tlv_alloc(0);
1085 if (!msg->rep)
1086 return -ENOMEM;
1087 return 0;
1088 case TIPC_CMD_GET_BEARER_NAMES:
1089 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1090 dump.dumpit = tipc_nl_bearer_dump;
1091 dump.format = tipc_nl_compat_bearer_dump;
1092 return tipc_nl_compat_dumpit(&dump, msg);
1093 case TIPC_CMD_ENABLE_BEARER:
1094 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1095 doit.doit = __tipc_nl_bearer_enable;
1096 doit.transcode = tipc_nl_compat_bearer_enable;
1097 return tipc_nl_compat_doit(&doit, msg);
1098 case TIPC_CMD_DISABLE_BEARER:
1099 msg->req_type = TIPC_TLV_BEARER_NAME;
1100 doit.doit = __tipc_nl_bearer_disable;
1101 doit.transcode = tipc_nl_compat_bearer_disable;
1102 return tipc_nl_compat_doit(&doit, msg);
1103 case TIPC_CMD_SHOW_LINK_STATS:
1104 msg->req_type = TIPC_TLV_LINK_NAME;
1105 msg->rep_size = ULTRA_STRING_MAX_LEN;
1106 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1107 dump.dumpit = tipc_nl_node_dump_link;
1108 dump.format = tipc_nl_compat_link_stat_dump;
1109 return tipc_nl_compat_dumpit(&dump, msg);
1110 case TIPC_CMD_GET_LINKS:
1111 msg->req_type = TIPC_TLV_NET_ADDR;
1112 msg->rep_size = ULTRA_STRING_MAX_LEN;
1113 dump.dumpit = tipc_nl_node_dump_link;
1114 dump.format = tipc_nl_compat_link_dump;
1115 return tipc_nl_compat_dumpit(&dump, msg);
1116 case TIPC_CMD_SET_LINK_TOL:
1117 case TIPC_CMD_SET_LINK_PRI:
1118 case TIPC_CMD_SET_LINK_WINDOW:
1119 msg->req_type = TIPC_TLV_LINK_CONFIG;
1120 doit.doit = tipc_nl_node_set_link;
1121 doit.transcode = tipc_nl_compat_link_set;
1122 return tipc_nl_compat_doit(&doit, msg);
1123 case TIPC_CMD_RESET_LINK_STATS:
1124 msg->req_type = TIPC_TLV_LINK_NAME;
1125 doit.doit = tipc_nl_node_reset_link_stats;
1126 doit.transcode = tipc_nl_compat_link_reset_stats;
1127 return tipc_nl_compat_doit(&doit, msg);
1128 case TIPC_CMD_SHOW_NAME_TABLE:
1129 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1130 msg->rep_size = ULTRA_STRING_MAX_LEN;
1131 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1132 dump.header = tipc_nl_compat_name_table_dump_header;
1133 dump.dumpit = tipc_nl_name_table_dump;
1134 dump.format = tipc_nl_compat_name_table_dump;
1135 return tipc_nl_compat_dumpit(&dump, msg);
1136 case TIPC_CMD_SHOW_PORTS:
1137 msg->rep_size = ULTRA_STRING_MAX_LEN;
1138 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1139 dump.dumpit = tipc_nl_sk_dump;
1140 dump.format = tipc_nl_compat_sk_dump;
1141 return tipc_nl_compat_dumpit(&dump, msg);
1142 case TIPC_CMD_GET_MEDIA_NAMES:
1143 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1144 dump.dumpit = tipc_nl_media_dump;
1145 dump.format = tipc_nl_compat_media_dump;
1146 return tipc_nl_compat_dumpit(&dump, msg);
1147 case TIPC_CMD_GET_NODES:
1148 msg->rep_size = ULTRA_STRING_MAX_LEN;
1149 dump.dumpit = tipc_nl_node_dump;
1150 dump.format = tipc_nl_compat_node_dump;
1151 return tipc_nl_compat_dumpit(&dump, msg);
1152 case TIPC_CMD_SET_NODE_ADDR:
1153 msg->req_type = TIPC_TLV_NET_ADDR;
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_SET_NETID:
1158 msg->req_type = TIPC_TLV_UNSIGNED;
1159 doit.doit = __tipc_nl_net_set;
1160 doit.transcode = tipc_nl_compat_net_set;
1161 return tipc_nl_compat_doit(&doit, msg);
1162 case TIPC_CMD_GET_NETID:
1163 msg->rep_size = sizeof(u32);
1164 dump.dumpit = tipc_nl_net_dump;
1165 dump.format = tipc_nl_compat_net_dump;
1166 return tipc_nl_compat_dumpit(&dump, msg);
1167 case TIPC_CMD_SHOW_STATS:
1168 return tipc_cmd_show_stats_compat(msg);
1169 }
1170
1171 return -EOPNOTSUPP;
1172 }
1173
1174 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1175 {
1176 int err;
1177 int len;
1178 struct tipc_nl_compat_msg msg;
1179 struct nlmsghdr *req_nlh;
1180 struct nlmsghdr *rep_nlh;
1181 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1182
1183 memset(&msg, 0, sizeof(msg));
1184
1185 req_nlh = (struct nlmsghdr *)skb->data;
1186 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1187 msg.cmd = req_userhdr->cmd;
1188 msg.net = genl_info_net(info);
1189 msg.dst_sk = skb->sk;
1190
1191 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1192 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1193 err = -EACCES;
1194 goto send;
1195 }
1196
1197 len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1198 if (len && !TLV_OK(msg.req, len)) {
1199 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1200 err = -EOPNOTSUPP;
1201 goto send;
1202 }
1203
1204 err = tipc_nl_compat_handle(&msg);
1205 if ((err == -EOPNOTSUPP) || (err == -EPERM))
1206 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1207 else if (err == -EINVAL)
1208 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1209 send:
1210 if (!msg.rep)
1211 return err;
1212
1213 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1214 skb_push(msg.rep, len);
1215 rep_nlh = nlmsg_hdr(msg.rep);
1216 memcpy(rep_nlh, info->nlhdr, len);
1217 rep_nlh->nlmsg_len = msg.rep->len;
1218 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
1219
1220 return err;
1221 }
1222
1223 static const struct genl_ops tipc_genl_compat_ops[] = {
1224 {
1225 .cmd = TIPC_GENL_CMD,
1226 .doit = tipc_nl_compat_recv,
1227 },
1228 };
1229
1230 static struct genl_family tipc_genl_compat_family __ro_after_init = {
1231 .name = TIPC_GENL_NAME,
1232 .version = TIPC_GENL_VERSION,
1233 .hdrsize = TIPC_GENL_HDRLEN,
1234 .maxattr = 0,
1235 .netnsok = true,
1236 .module = THIS_MODULE,
1237 .ops = tipc_genl_compat_ops,
1238 .n_ops = ARRAY_SIZE(tipc_genl_compat_ops),
1239 };
1240
1241 int __init tipc_netlink_compat_start(void)
1242 {
1243 int res;
1244
1245 res = genl_register_family(&tipc_genl_compat_family);
1246 if (res) {
1247 pr_err("Failed to register legacy compat interface\n");
1248 return res;
1249 }
1250
1251 return 0;
1252 }
1253
1254 void tipc_netlink_compat_stop(void)
1255 {
1256 genl_unregister_family(&tipc_genl_compat_family);
1257 }
CRIS linux kernel tree