Merge tag 'imx-dt-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo...
[linux-2.6-microblaze.git] / net / tipc / netlink_compat.c
1 /*
2  * Copyright (c) 2014, Ericsson AB
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the names of the copyright holders nor the names of its
14  *    contributors may be used to endorse or promote products derived from
15  *    this software without specific prior written permission.
16  *
17  * Alternatively, this software may be distributed under the terms of the
18  * GNU General Public License ("GPL") version 2 as published by the Free
19  * Software Foundation.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31  * POSSIBILITY OF SUCH DAMAGE.
32  */
33
34 #include "core.h"
35 #include "bearer.h"
36 #include "link.h"
37 #include "name_table.h"
38 #include "socket.h"
39 #include "node.h"
40 #include "net.h"
41 #include <net/genetlink.h>
42 #include <linux/tipc_config.h>
43
44 /* The legacy API had an artificial message length limit called
45  * ULTRA_STRING_MAX_LEN.
46  */
47 #define ULTRA_STRING_MAX_LEN 32768
48
49 #define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN)
50
51 #define REPLY_TRUNCATED "<truncated>\n"
52
53 struct tipc_nl_compat_msg {
54         u16 cmd;
55         int rep_type;
56         int rep_size;
57         int req_type;
58         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 }