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tipc: add broadcast link window set/get to nl api
[linux.git] / net / tipc / netlink_compat.c
CommitLineData
bfb3e5dd
RA		 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"
d0796d1e 35#include "bearer.h"
f2b3b2d4 36#include "link.h"
44a8ae94 37#include "name_table.h"
487d2a3a 38#include "socket.h"
4b28cb58 39#include "node.h"
964f9501 40#include "net.h"
bfb3e5dd
RA		 41#include <net/genetlink.h>
42#include <linux/tipc_config.h>
43
d0796d1e
RA		 44/* The legacy API had an artificial message length limit called
45 * ULTRA_STRING_MAX_LEN.
46 */
47#define ULTRA_STRING_MAX_LEN 32768
48
49#define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN)
50
51#define REPLY_TRUNCATED "<truncated>\n"
52
53struct tipc_nl_compat_msg {
54 u16 cmd;
f2b3b2d4 55 int rep_type;
d0796d1e 56 int rep_size;
9ab15465 57 int req_type;
c3d6fb85 58 struct net *net;
d0796d1e
RA		 59 struct sk_buff *rep;
60 struct tlv_desc *req;
61 struct sock *dst_sk;
62};
63
64struct tipc_nl_compat_cmd_dump {
44a8ae94 65 int (*header)(struct tipc_nl_compat_msg *);
d0796d1e
RA		 66 int (*dumpit)(struct sk_buff *, struct netlink_callback *);
67 int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
68};
69
9ab15465
RA		 70struct tipc_nl_compat_cmd_doit {
71 int (*doit)(struct sk_buff *skb, struct genl_info *info);
c3d6fb85
RA		 72 int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd,
73 struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
9ab15465
RA		 74};
75
d0796d1e
RA		 76static int tipc_skb_tailroom(struct sk_buff *skb)
77{
78 int tailroom;
79 int limit;
80
81 tailroom = skb_tailroom(skb);
82 limit = TIPC_SKB_MAX - skb->len;
83
84 if (tailroom < limit)
85 return tailroom;
86
87 return limit;
88}
89
90static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len)
91{
92 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb);
93
94 if (tipc_skb_tailroom(skb) < TLV_SPACE(len))
95 return -EMSGSIZE;
96
97 skb_put(skb, TLV_SPACE(len));
98 tlv->tlv_type = htons(type);
99 tlv->tlv_len = htons(TLV_LENGTH(len));
100 if (len && data)
101 memcpy(TLV_DATA(tlv), data, len);
102
103 return 0;
104}
105
f2b3b2d4
RA		 106static void tipc_tlv_init(struct sk_buff *skb, u16 type)
107{
108 struct tlv_desc *tlv = (struct tlv_desc *)skb->data;
109
110 TLV_SET_LEN(tlv, 0);
111 TLV_SET_TYPE(tlv, type);
112 skb_put(skb, sizeof(struct tlv_desc));
113}
114
115static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...)
116{
117 int n;
118 u16 len;
119 u32 rem;
120 char *buf;
121 struct tlv_desc *tlv;
122 va_list args;
123
124 rem = tipc_skb_tailroom(skb);
125
126 tlv = (struct tlv_desc *)skb->data;
127 len = TLV_GET_LEN(tlv);
128 buf = TLV_DATA(tlv) + len;
129
130 va_start(args, fmt);
131 n = vscnprintf(buf, rem, fmt, args);
132 va_end(args);
133
134 TLV_SET_LEN(tlv, n + len);
135 skb_put(skb, n);
136
137 return n;
138}
139
d0796d1e
RA		 140static struct sk_buff *tipc_tlv_alloc(int size)
141{
142 int hdr_len;
143 struct sk_buff *buf;
144
145 size = TLV_SPACE(size);
146 hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
147
148 buf = alloc_skb(hdr_len + size, GFP_KERNEL);
149 if (!buf)
150 return NULL;
151
152 skb_reserve(buf, hdr_len);
153
154 return buf;
155}
156
157static struct sk_buff *tipc_get_err_tlv(char *str)
158{
159 int str_len = strlen(str) + 1;
160 struct sk_buff *buf;
161
162 buf = tipc_tlv_alloc(TLV_SPACE(str_len));
163 if (buf)
164 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
165
166 return buf;
167}
168
169static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
170 struct tipc_nl_compat_msg *msg,
171 struct sk_buff *arg)
172{
173 int len = 0;
174 int err;
175 struct sk_buff *buf;
176 struct nlmsghdr *nlmsg;
177 struct netlink_callback cb;
178
179 memset(&cb, 0, sizeof(cb));
180 cb.nlh = (struct nlmsghdr *)arg->data;
181 cb.skb = arg;
182
183 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
184 if (!buf)
185 return -ENOMEM;
186
187 buf->sk = msg->dst_sk;
188
189 do {
190 int rem;
191
192 len = (*cmd->dumpit)(buf, &cb);
193
194 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
195 struct nlattr **attrs;
196
197 err = tipc_nlmsg_parse(nlmsg, &attrs);
198 if (err)
199 goto err_out;
200
201 err = (*cmd->format)(msg, attrs);
202 if (err)
203 goto err_out;
204
205 if (tipc_skb_tailroom(msg->rep) <= 1) {
206 err = -EMSGSIZE;
207 goto err_out;
208 }
209 }
210
211 skb_reset_tail_pointer(buf);
212 buf->len = 0;
213
214 } while (len);
215
216 err = 0;
217
218err_out:
219 kfree_skb(buf);
220
221 if (err == -EMSGSIZE) {
222 /* The legacy API only considered messages filling
223 * "ULTRA_STRING_MAX_LEN" to be truncated.
224 */
225 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
226 char *tail = skb_tail_pointer(msg->rep);
227
228 if (*tail != '\0')
229 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
230 REPLY_TRUNCATED);
231 }
232
233 return 0;
234 }
235
236 return err;
237}
238
239static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
240 struct tipc_nl_compat_msg *msg)
241{
242 int err;
243 struct sk_buff *arg;
244
f2b3b2d4
RA		 245 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
246 return -EINVAL;
247
d0796d1e
RA		 248 msg->rep = tipc_tlv_alloc(msg->rep_size);
249 if (!msg->rep)
250 return -ENOMEM;
251
f2b3b2d4
RA		 252 if (msg->rep_type)
253 tipc_tlv_init(msg->rep, msg->rep_type);
254
44a8ae94
RA		 255 if (cmd->header)
256 (*cmd->header)(msg);
257
d0796d1e
RA		 258 arg = nlmsg_new(0, GFP_KERNEL);
259 if (!arg) {
260 kfree_skb(msg->rep);
261 return -ENOMEM;
262 }
263
264 err = __tipc_nl_compat_dumpit(cmd, msg, arg);
265 if (err)
266 kfree_skb(msg->rep);
267
268 kfree_skb(arg);
269
270 return err;
271}
272
9ab15465
RA		 273static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
274 struct tipc_nl_compat_msg *msg)
275{
276 int err;
277 struct sk_buff *doit_buf;
278 struct sk_buff *trans_buf;
279 struct nlattr **attrbuf;
280 struct genl_info info;
281
282 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
283 if (!trans_buf)
284 return -ENOMEM;
285
c3d6fb85 286 err = (*cmd->transcode)(cmd, trans_buf, msg);
9ab15465
RA		 287 if (err)
288 goto trans_out;
289
290 attrbuf = kmalloc((tipc_genl_family.maxattr + 1) *
291 sizeof(struct nlattr *), GFP_KERNEL);
292 if (!attrbuf) {
293 err = -ENOMEM;
294 goto trans_out;
295 }
296
297 err = nla_parse(attrbuf, tipc_genl_family.maxattr,
298 (const struct nlattr *)trans_buf->data,
299 trans_buf->len, NULL);
300 if (err)
301 goto parse_out;
302
303 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
304 if (!doit_buf) {
305 err = -ENOMEM;
306 goto parse_out;
307 }
308
309 doit_buf->sk = msg->dst_sk;
310
311 memset(&info, 0, sizeof(info));
312 info.attrs = attrbuf;
313
314 err = (*cmd->doit)(doit_buf, &info);
315
316 kfree_skb(doit_buf);
317parse_out:
318 kfree(attrbuf);
319trans_out:
320 kfree_skb(trans_buf);
321
322 return err;
323}
324
325static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
326 struct tipc_nl_compat_msg *msg)
327{
328 int err;
329
330 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
331 return -EINVAL;
332
333 err = __tipc_nl_compat_doit(cmd, msg);
334 if (err)
335 return err;
336
337 /* The legacy API considered an empty message a success message */
338 msg->rep = tipc_tlv_alloc(0);
339 if (!msg->rep)
340 return -ENOMEM;
341
342 return 0;
343}
344
d0796d1e
RA		 345static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
346 struct nlattr **attrs)
347{
348 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
349
350 nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, attrs[TIPC_NLA_BEARER],
351 NULL);
352
353 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
354 nla_data(bearer[TIPC_NLA_BEARER_NAME]),
355 nla_len(bearer[TIPC_NLA_BEARER_NAME]));
356}
357
c3d6fb85
RA		 358static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
359 struct sk_buff *skb,
9ab15465
RA		 360 struct tipc_nl_compat_msg *msg)
361{
362 struct nlattr *prop;
363 struct nlattr *bearer;
364 struct tipc_bearer_config *b;
365
366 b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
367
368 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
369 if (!bearer)
370 return -EMSGSIZE;
371
372 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
373 return -EMSGSIZE;
374
375 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
376 return -EMSGSIZE;
377
378 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
379 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
380 if (!prop)
381 return -EMSGSIZE;
382 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
383 return -EMSGSIZE;
384 nla_nest_end(skb, prop);
385 }
386 nla_nest_end(skb, bearer);
387
388 return 0;
389}
390
c3d6fb85
RA		 391static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
392 struct sk_buff *skb,
9ab15465
RA		 393 struct tipc_nl_compat_msg *msg)
394{
395 char *name;
396 struct nlattr *bearer;
397
398 name = (char *)TLV_DATA(msg->req);
399
400 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
401 if (!bearer)
402 return -EMSGSIZE;
403
404 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
405 return -EMSGSIZE;
406
407 nla_nest_end(skb, bearer);
408
409 return 0;
410}
411
f2b3b2d4
RA		 412static inline u32 perc(u32 count, u32 total)
413{
414 return (count * 100 + (total / 2)) / total;
415}
416
417static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
418 struct nlattr *prop[], struct nlattr *stats[])
419{
420 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
421 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
422
423 tipc_tlv_sprintf(msg->rep,
424 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
425 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
426 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
427 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
428 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
429 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
430
431 tipc_tlv_sprintf(msg->rep,
432 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
433 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
434 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
435 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
436 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
437 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
438
439 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
440 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
441 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
442 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
443
444 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
445 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
446 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
447 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
448
449 tipc_tlv_sprintf(msg->rep,
450 " Congestion link:%u Send queue max:%u avg:%u",
451 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
452 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
453 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
454}
455
456static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
457 struct nlattr **attrs)
458{
459 char *name;
460 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
461 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
462 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
463
464 nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
465
466 nla_parse_nested(prop, TIPC_NLA_PROP_MAX, link[TIPC_NLA_LINK_PROP],
467 NULL);
468
469 nla_parse_nested(stats, TIPC_NLA_STATS_MAX, link[TIPC_NLA_LINK_STATS],
470 NULL);
471
472 name = (char *)TLV_DATA(msg->req);
473 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
474 return 0;
475
476 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
477 nla_data(link[TIPC_NLA_LINK_NAME]));
478
479 if (link[TIPC_NLA_LINK_BROADCAST]) {
480 __fill_bc_link_stat(msg, prop, stats);
481 return 0;
482 }
483
484 if (link[TIPC_NLA_LINK_ACTIVE])
485 tipc_tlv_sprintf(msg->rep, " ACTIVE");
486 else if (link[TIPC_NLA_LINK_UP])
487 tipc_tlv_sprintf(msg->rep, " STANDBY");
488 else
489 tipc_tlv_sprintf(msg->rep, " DEFUNCT");
490
491 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
492 nla_get_u32(link[TIPC_NLA_LINK_MTU]),
493 nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
494
495 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
496 nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
497 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
498
499 tipc_tlv_sprintf(msg->rep,
500 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
501 nla_get_u32(link[TIPC_NLA_LINK_RX]) -
502 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
503 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
504 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
505 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
506 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
507
508 tipc_tlv_sprintf(msg->rep,
509 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
510 nla_get_u32(link[TIPC_NLA_LINK_TX]) -
511 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
512 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
513 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
514 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
515 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
516
517 tipc_tlv_sprintf(msg->rep,
518 " TX profile sample:%u packets average:%u octets\n",
519 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
520 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
521 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
522
523 tipc_tlv_sprintf(msg->rep,
524 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
525 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
526 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
527 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
528 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
529 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
530 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
531 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
532 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
533
534 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
535 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
536 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
537 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
538 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
539 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
540 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
541
542 tipc_tlv_sprintf(msg->rep,
543 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
544 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
545 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
546 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
547 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
548 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
549
550 tipc_tlv_sprintf(msg->rep,
551 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
552 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
553 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
554 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
555 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
556 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
557
558 tipc_tlv_sprintf(msg->rep,
559 " Congestion link:%u Send queue max:%u avg:%u",
560 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
561 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
562 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
563
564 return 0;
565}
566
357ebdbf
RA		 567static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
568 struct nlattr **attrs)
569{
570 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
571 struct tipc_link_info link_info;
572
573 nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
574
575 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
576 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
577 strcpy(link_info.str, nla_data(link[TIPC_NLA_LINK_NAME]));
578
579 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
580 &link_info, sizeof(link_info));
581}
582
c3d6fb85
RA		 583static int __tipc_add_link_prop(struct sk_buff *skb,
584 struct tipc_nl_compat_msg *msg,
585 struct tipc_link_config *lc)
586{
587 switch (msg->cmd) {
588 case TIPC_CMD_SET_LINK_PRI:
589 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
590 case TIPC_CMD_SET_LINK_TOL:
591 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
592 case TIPC_CMD_SET_LINK_WINDOW:
593 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
594 }
595
596 return -EINVAL;
597}
598
599static int tipc_nl_compat_media_set(struct sk_buff *skb,
600 struct tipc_nl_compat_msg *msg)
37e2d484 601{
37e2d484 602 struct nlattr *prop;
c3d6fb85
RA		 603 struct nlattr *media;
604 struct tipc_link_config *lc;
605
606 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
607
608 media = nla_nest_start(skb, TIPC_NLA_MEDIA);
609 if (!media)
610 return -EMSGSIZE;
611
612 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
613 return -EMSGSIZE;
614
615 prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP);
616 if (!prop)
617 return -EMSGSIZE;
618
619 __tipc_add_link_prop(skb, msg, lc);
620 nla_nest_end(skb, prop);
621 nla_nest_end(skb, media);
622
623 return 0;
624}
625
626static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
627 struct tipc_nl_compat_msg *msg)
628{
629 struct nlattr *prop;
630 struct nlattr *bearer;
631 struct tipc_link_config *lc;
632
633 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
634
635 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
636 if (!bearer)
637 return -EMSGSIZE;
638
639 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
640 return -EMSGSIZE;
641
642 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
643 if (!prop)
644 return -EMSGSIZE;
645
646 __tipc_add_link_prop(skb, msg, lc);
647 nla_nest_end(skb, prop);
648 nla_nest_end(skb, bearer);
649
650 return 0;
651}
652
653static int __tipc_nl_compat_link_set(struct sk_buff *skb,
654 struct tipc_nl_compat_msg *msg)
655{
656 struct nlattr *prop;
657 struct nlattr *link;
37e2d484
RA		 658 struct tipc_link_config *lc;
659
660 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
661
662 link = nla_nest_start(skb, TIPC_NLA_LINK);
663 if (!link)
664 return -EMSGSIZE;
665
666 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
667 return -EMSGSIZE;
668
669 prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP);
670 if (!prop)
671 return -EMSGSIZE;
672
c3d6fb85 673 __tipc_add_link_prop(skb, msg, lc);
37e2d484
RA		 674 nla_nest_end(skb, prop);
675 nla_nest_end(skb, link);
676
677 return 0;
678}
679
c3d6fb85
RA		 680static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
681 struct sk_buff *skb,
682 struct tipc_nl_compat_msg *msg)
683{
684 struct tipc_link_config *lc;
685 struct tipc_bearer *bearer;
686 struct tipc_media *media;
687
688 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
689
690 media = tipc_media_find(lc->name);
691 if (media) {
692 cmd->doit = &tipc_nl_media_set;
693 return tipc_nl_compat_media_set(skb, msg);
694 }
695
696 bearer = tipc_bearer_find(msg->net, lc->name);
697 if (bearer) {
698 cmd->doit = &tipc_nl_bearer_set;
699 return tipc_nl_compat_bearer_set(skb, msg);
700 }
701
702 return __tipc_nl_compat_link_set(skb, msg);
703}
704
705static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
706 struct sk_buff *skb,
1817877b
RA		 707 struct tipc_nl_compat_msg *msg)
708{
709 char *name;
710 struct nlattr *link;
711
712 name = (char *)TLV_DATA(msg->req);
713
714 link = nla_nest_start(skb, TIPC_NLA_LINK);
715 if (!link)
716 return -EMSGSIZE;
717
718 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
719 return -EMSGSIZE;
720
721 nla_nest_end(skb, link);
722
723 return 0;
724}
725
44a8ae94
RA		 726static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
727{
728 int i;
729 u32 depth;
730 struct tipc_name_table_query *ntq;
731 static const char * const header[] = {
732 "Type ",
733 "Lower Upper ",
734 "Port Identity ",
735 "Publication Scope"
736 };
737
738 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
739
740 depth = ntohl(ntq->depth);
741
742 if (depth > 4)
743 depth = 4;
744 for (i = 0; i < depth; i++)
745 tipc_tlv_sprintf(msg->rep, header[i]);
746 tipc_tlv_sprintf(msg->rep, "\n");
747
748 return 0;
749}
750
751static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
752 struct nlattr **attrs)
753{
754 char port_str[27];
755 struct tipc_name_table_query *ntq;
756 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
757 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
758 u32 node, depth, type, lowbound, upbound;
759 static const char * const scope_str[] = {"", " zone", " cluster",
760 " node"};
761
762 nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX,
763 attrs[TIPC_NLA_NAME_TABLE], NULL);
764
765 nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, nt[TIPC_NLA_NAME_TABLE_PUBL],
766 NULL);
767
768 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
769
770 depth = ntohl(ntq->depth);
771 type = ntohl(ntq->type);
772 lowbound = ntohl(ntq->lowbound);
773 upbound = ntohl(ntq->upbound);
774
775 if (!(depth & TIPC_NTQ_ALLTYPES) &&
776 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
777 return 0;
778 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
779 return 0;
780 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
781 return 0;
782
783 tipc_tlv_sprintf(msg->rep, "%-10u ",
784 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
785
786 if (depth == 1)
787 goto out;
788
789 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
790 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
791 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
792
793 if (depth == 2)
794 goto out;
795
796 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
797 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
798 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
799 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
800
801 if (depth == 3)
802 goto out;
803
804 tipc_tlv_sprintf(msg->rep, "%-10u %s",
805 nla_get_u32(publ[TIPC_NLA_PUBL_REF]),
806 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
807out:
808 tipc_tlv_sprintf(msg->rep, "\n");
809
810 return 0;
811}
812
487d2a3a
RA		 813static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
814 struct nlattr **attrs)
815{
816 u32 type, lower, upper;
817 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
818
819 nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL], NULL);
820
821 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
822 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
823 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
824
825 if (lower == upper)
826 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
827 else
828 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
829
830 return 0;
831}
832
833static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
834{
835 int err;
836 void *hdr;
837 struct nlattr *nest;
838 struct sk_buff *args;
839 struct tipc_nl_compat_cmd_dump dump;
840
841 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
842 if (!args)
843 return -ENOMEM;
844
845 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
846 TIPC_NL_PUBL_GET);
847
848 nest = nla_nest_start(args, TIPC_NLA_SOCK);
849 if (!nest) {
850 kfree_skb(args);
851 return -EMSGSIZE;
852 }
853
854 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
855 kfree_skb(args);
856 return -EMSGSIZE;
857 }
858
859 nla_nest_end(args, nest);
860 genlmsg_end(args, hdr);
861
862 dump.dumpit = tipc_nl_publ_dump;
863 dump.format = __tipc_nl_compat_publ_dump;
864
865 err = __tipc_nl_compat_dumpit(&dump, msg, args);
866
867 kfree_skb(args);
868
869 return err;
870}
871
872static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
873 struct nlattr **attrs)
874{
875 int err;
876 u32 sock_ref;
877 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
878
879 nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], NULL);
880
881 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
882 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
883
884 if (sock[TIPC_NLA_SOCK_CON]) {
885 u32 node;
886 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
887
888 nla_parse_nested(con, TIPC_NLA_CON_MAX, sock[TIPC_NLA_SOCK_CON],
889 NULL);
890
891 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
892 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>",
893 tipc_zone(node),
894 tipc_cluster(node),
895 tipc_node(node),
896 nla_get_u32(con[TIPC_NLA_CON_SOCK]));
897
898 if (con[TIPC_NLA_CON_FLAG])
899 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
900 nla_get_u32(con[TIPC_NLA_CON_TYPE]),
901 nla_get_u32(con[TIPC_NLA_CON_INST]));
902 else
903 tipc_tlv_sprintf(msg->rep, "\n");
904 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
905 tipc_tlv_sprintf(msg->rep, " bound to");
906
907 err = tipc_nl_compat_publ_dump(msg, sock_ref);
908 if (err)
909 return err;
910 }
911 tipc_tlv_sprintf(msg->rep, "\n");
912
913 return 0;
914}
915
5bfc335a
RA		 916static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
917 struct nlattr **attrs)
918{
919 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
920
921 nla_parse_nested(media, TIPC_NLA_MEDIA_MAX, attrs[TIPC_NLA_MEDIA],
922 NULL);
923
924 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
925 nla_data(media[TIPC_NLA_MEDIA_NAME]),
926 nla_len(media[TIPC_NLA_MEDIA_NAME]));
927}
928
4b28cb58
RA		 929static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
930 struct nlattr **attrs)
931{
932 struct tipc_node_info node_info;
933 struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
934
935 nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE], NULL);
936
937 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
938 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
939
940 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
941 sizeof(node_info));
942}
943
c3d6fb85
RA		 944static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
945 struct sk_buff *skb,
d7cc75d3
RA		 946 struct tipc_nl_compat_msg *msg)
947{
948 u32 val;
949 struct nlattr *net;
950
951 val = ntohl(*(__be32 *)TLV_DATA(msg->req));
952
953 net = nla_nest_start(skb, TIPC_NLA_NET);
954 if (!net)
955 return -EMSGSIZE;
956
964f9501
RA		 957 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
958 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
959 return -EMSGSIZE;
960 } else if (msg->cmd == TIPC_CMD_SET_NETID) {
961 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
962 return -EMSGSIZE;
963 }
d7cc75d3
RA		 964 nla_nest_end(skb, net);
965
966 return 0;
967}
968
3c26181c
RA		 969static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
970 struct nlattr **attrs)
971{
972 __be32 id;
973 struct nlattr *net[TIPC_NLA_NET_MAX + 1];
974
975 nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET], NULL);
976 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
977
978 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
979}
980
5a81a637
RA		 981static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
982{
983 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
984 if (!msg->rep)
985 return -ENOMEM;
986
987 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
988 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
989
990 return 0;
991}
992
d0796d1e
RA		 993static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
994{
995 struct tipc_nl_compat_cmd_dump dump;
9ab15465 996 struct tipc_nl_compat_cmd_doit doit;
d0796d1e
RA		 997
998 memset(&dump, 0, sizeof(dump));
9ab15465 999 memset(&doit, 0, sizeof(doit));
d0796d1e
RA		 1000
1001 switch (msg->cmd) {
22ae7cff
RA		 1002 case TIPC_CMD_NOOP:
1003 msg->rep = tipc_tlv_alloc(0);
1004 if (!msg->rep)
1005 return -ENOMEM;
1006 return 0;
d0796d1e
RA		 1007 case TIPC_CMD_GET_BEARER_NAMES:
1008 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1009 dump.dumpit = tipc_nl_bearer_dump;
1010 dump.format = tipc_nl_compat_bearer_dump;
1011 return tipc_nl_compat_dumpit(&dump, msg);
9ab15465
RA		 1012 case TIPC_CMD_ENABLE_BEARER:
1013 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1014 doit.doit = tipc_nl_bearer_enable;
1015 doit.transcode = tipc_nl_compat_bearer_enable;
1016 return tipc_nl_compat_doit(&doit, msg);
1017 case TIPC_CMD_DISABLE_BEARER:
1018 msg->req_type = TIPC_TLV_BEARER_NAME;
1019 doit.doit = tipc_nl_bearer_disable;
1020 doit.transcode = tipc_nl_compat_bearer_disable;
1021 return tipc_nl_compat_doit(&doit, msg);
f2b3b2d4
RA		 1022 case TIPC_CMD_SHOW_LINK_STATS:
1023 msg->req_type = TIPC_TLV_LINK_NAME;
1024 msg->rep_size = ULTRA_STRING_MAX_LEN;
1025 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1026 dump.dumpit = tipc_nl_link_dump;
1027 dump.format = tipc_nl_compat_link_stat_dump;
1028 return tipc_nl_compat_dumpit(&dump, msg);
357ebdbf
RA		 1029 case TIPC_CMD_GET_LINKS:
1030 msg->req_type = TIPC_TLV_NET_ADDR;
1031 msg->rep_size = ULTRA_STRING_MAX_LEN;
1032 dump.dumpit = tipc_nl_link_dump;
1033 dump.format = tipc_nl_compat_link_dump;
1034 return tipc_nl_compat_dumpit(&dump, msg);
37e2d484
RA		 1035 case TIPC_CMD_SET_LINK_TOL:
1036 case TIPC_CMD_SET_LINK_PRI:
1037 case TIPC_CMD_SET_LINK_WINDOW:
1038 msg->req_type = TIPC_TLV_LINK_CONFIG;
1039 doit.doit = tipc_nl_link_set;
1040 doit.transcode = tipc_nl_compat_link_set;
1041 return tipc_nl_compat_doit(&doit, msg);
1817877b
RA		 1042 case TIPC_CMD_RESET_LINK_STATS:
1043 msg->req_type = TIPC_TLV_LINK_NAME;
1044 doit.doit = tipc_nl_link_reset_stats;
1045 doit.transcode = tipc_nl_compat_link_reset_stats;
1046 return tipc_nl_compat_doit(&doit, msg);
44a8ae94
RA		 1047 case TIPC_CMD_SHOW_NAME_TABLE:
1048 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1049 msg->rep_size = ULTRA_STRING_MAX_LEN;
1050 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1051 dump.header = tipc_nl_compat_name_table_dump_header;
1052 dump.dumpit = tipc_nl_name_table_dump;
1053 dump.format = tipc_nl_compat_name_table_dump;
1054 return tipc_nl_compat_dumpit(&dump, msg);
487d2a3a
RA		 1055 case TIPC_CMD_SHOW_PORTS:
1056 msg->rep_size = ULTRA_STRING_MAX_LEN;
1057 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1058 dump.dumpit = tipc_nl_sk_dump;
1059 dump.format = tipc_nl_compat_sk_dump;
1060 return tipc_nl_compat_dumpit(&dump, msg);
5bfc335a
RA		 1061 case TIPC_CMD_GET_MEDIA_NAMES:
1062 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1063 dump.dumpit = tipc_nl_media_dump;
1064 dump.format = tipc_nl_compat_media_dump;
1065 return tipc_nl_compat_dumpit(&dump, msg);
4b28cb58
RA		 1066 case TIPC_CMD_GET_NODES:
1067 msg->rep_size = ULTRA_STRING_MAX_LEN;
1068 dump.dumpit = tipc_nl_node_dump;
1069 dump.format = tipc_nl_compat_node_dump;
1070 return tipc_nl_compat_dumpit(&dump, msg);
d7cc75d3
RA		 1071 case TIPC_CMD_SET_NODE_ADDR:
1072 msg->req_type = TIPC_TLV_NET_ADDR;
1073 doit.doit = tipc_nl_net_set;
1074 doit.transcode = tipc_nl_compat_net_set;
1075 return tipc_nl_compat_doit(&doit, msg);
964f9501
RA		 1076 case TIPC_CMD_SET_NETID:
1077 msg->req_type = TIPC_TLV_UNSIGNED;
1078 doit.doit = tipc_nl_net_set;
1079 doit.transcode = tipc_nl_compat_net_set;
1080 return tipc_nl_compat_doit(&doit, msg);
3c26181c
RA		 1081 case TIPC_CMD_GET_NETID:
1082 msg->rep_size = sizeof(u32);
1083 dump.dumpit = tipc_nl_net_dump;
1084 dump.format = tipc_nl_compat_net_dump;
1085 return tipc_nl_compat_dumpit(&dump, msg);
5a81a637
RA		 1086 case TIPC_CMD_SHOW_STATS:
1087 return tipc_cmd_show_stats_compat(msg);
d0796d1e
RA		 1088 }
1089
1090 return -EOPNOTSUPP;
1091}
1092
1093static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1094{
1095 int err;
1096 int len;
1097 struct tipc_nl_compat_msg msg;
1098 struct nlmsghdr *req_nlh;
1099 struct nlmsghdr *rep_nlh;
1100 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
d0796d1e
RA		 1101
1102 memset(&msg, 0, sizeof(msg));
1103
1104 req_nlh = (struct nlmsghdr *)skb->data;
1105 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1106 msg.cmd = req_userhdr->cmd;
1107 msg.dst_sk = info->dst_sk;
c3d6fb85 1108 msg.net = genl_info_net(info);
d0796d1e
RA		 1109
1110 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1111 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1112 err = -EACCES;
1113 goto send;
1114 }
1115
1116 len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1117 if (TLV_GET_LEN(msg.req) && !TLV_OK(msg.req, len)) {
1118 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1119 err = -EOPNOTSUPP;
1120 goto send;
1121 }
1122
1123 err = tipc_nl_compat_handle(&msg);
1124 if (err == -EOPNOTSUPP)
1125 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1126 else if (err == -EINVAL)
1127 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1128send:
1129 if (!msg.rep)
1130 return err;
1131
1132 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1133 skb_push(msg.rep, len);
1134 rep_nlh = nlmsg_hdr(msg.rep);
1135 memcpy(rep_nlh, info->nlhdr, len);
1136 rep_nlh->nlmsg_len = msg.rep->len;
c3d6fb85 1137 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
d0796d1e
RA		 1138
1139 return err;
1140}
1141
bfb3e5dd
RA		 1142static struct genl_family tipc_genl_compat_family = {
1143 .id = GENL_ID_GENERATE,
1144 .name = TIPC_GENL_NAME,
1145 .version = TIPC_GENL_VERSION,
1146 .hdrsize = TIPC_GENL_HDRLEN,
1147 .maxattr = 0,
1148 .netnsok = true,
1149};
1150
1151static struct genl_ops tipc_genl_compat_ops[] = {
1152 {
1153 .cmd = TIPC_GENL_CMD,
22ae7cff 1154 .doit = tipc_nl_compat_recv,
bfb3e5dd
RA		 1155 },
1156};
1157
1158int tipc_netlink_compat_start(void)
1159{
1160 int res;
1161
1162 res = genl_register_family_with_ops(&tipc_genl_compat_family,
1163 tipc_genl_compat_ops);
1164 if (res) {
1165 pr_err("Failed to register legacy compat interface\n");
1166 return res;
1167 }
1168
1169 return 0;
1170}
1171
1172void tipc_netlink_compat_stop(void)
1173{
1174 genl_unregister_family(&tipc_genl_compat_family);
1175}
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