ALSA: firewire-lib: code refactoring for data block calculation
[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         int req_size;
59         struct net *net;
60         struct sk_buff *rep;
61         struct tlv_desc *req;
62         struct sock *dst_sk;
63 };
64
65 struct tipc_nl_compat_cmd_dump {
66         int (*header)(struct tipc_nl_compat_msg *);
67         int (*dumpit)(struct sk_buff *, struct netlink_callback *);
68         int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
69 };
70
71 struct tipc_nl_compat_cmd_doit {
72         int (*doit)(struct sk_buff *skb, struct genl_info *info);
73         int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd,
74                          struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
75 };
76
77 static int tipc_skb_tailroom(struct sk_buff *skb)
78 {
79         int tailroom;
80         int limit;
81
82         tailroom = skb_tailroom(skb);
83         limit = TIPC_SKB_MAX - skb->len;
84
85         if (tailroom < limit)
86                 return tailroom;
87
88         return limit;
89 }
90
91 static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv)
92 {
93         return TLV_GET_LEN(tlv) - TLV_SPACE(0);
94 }
95
96 static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len)
97 {
98         struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb);
99
100         if (tipc_skb_tailroom(skb) < TLV_SPACE(len))
101                 return -EMSGSIZE;
102
103         skb_put(skb, TLV_SPACE(len));
104         tlv->tlv_type = htons(type);
105         tlv->tlv_len = htons(TLV_LENGTH(len));
106         if (len && data)
107                 memcpy(TLV_DATA(tlv), data, len);
108
109         return 0;
110 }
111
112 static void tipc_tlv_init(struct sk_buff *skb, u16 type)
113 {
114         struct tlv_desc *tlv = (struct tlv_desc *)skb->data;
115
116         TLV_SET_LEN(tlv, 0);
117         TLV_SET_TYPE(tlv, type);
118         skb_put(skb, sizeof(struct tlv_desc));
119 }
120
121 static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...)
122 {
123         int n;
124         u16 len;
125         u32 rem;
126         char *buf;
127         struct tlv_desc *tlv;
128         va_list args;
129
130         rem = tipc_skb_tailroom(skb);
131
132         tlv = (struct tlv_desc *)skb->data;
133         len = TLV_GET_LEN(tlv);
134         buf = TLV_DATA(tlv) + len;
135
136         va_start(args, fmt);
137         n = vscnprintf(buf, rem, fmt, args);
138         va_end(args);
139
140         TLV_SET_LEN(tlv, n + len);
141         skb_put(skb, n);
142
143         return n;
144 }
145
146 static struct sk_buff *tipc_tlv_alloc(int size)
147 {
148         int hdr_len;
149         struct sk_buff *buf;
150
151         size = TLV_SPACE(size);
152         hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
153
154         buf = alloc_skb(hdr_len + size, GFP_KERNEL);
155         if (!buf)
156                 return NULL;
157
158         skb_reserve(buf, hdr_len);
159
160         return buf;
161 }
162
163 static struct sk_buff *tipc_get_err_tlv(char *str)
164 {
165         int str_len = strlen(str) + 1;
166         struct sk_buff *buf;
167
168         buf = tipc_tlv_alloc(TLV_SPACE(str_len));
169         if (buf)
170                 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
171
172         return buf;
173 }
174
175 static inline bool string_is_valid(char *s, int len)
176 {
177         return memchr(s, '\0', len) ? true : false;
178 }
179
180 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
181                                    struct tipc_nl_compat_msg *msg,
182                                    struct sk_buff *arg)
183 {
184         struct genl_dumpit_info info;
185         int len = 0;
186         int err;
187         struct sk_buff *buf;
188         struct nlmsghdr *nlmsg;
189         struct netlink_callback cb;
190         struct nlattr **attrbuf;
191
192         memset(&cb, 0, sizeof(cb));
193         cb.nlh = (struct nlmsghdr *)arg->data;
194         cb.skb = arg;
195         cb.data = &info;
196
197         buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
198         if (!buf)
199                 return -ENOMEM;
200
201         buf->sk = msg->dst_sk;
202         if (__tipc_dump_start(&cb, msg->net)) {
203                 kfree_skb(buf);
204                 return -ENOMEM;
205         }
206
207         attrbuf = kcalloc(tipc_genl_family.maxattr + 1,
208                           sizeof(struct nlattr *), GFP_KERNEL);
209         if (!attrbuf) {
210                 err = -ENOMEM;
211                 goto err_out;
212         }
213
214         info.attrs = attrbuf;
215         err = nlmsg_parse_deprecated(cb.nlh, GENL_HDRLEN, attrbuf,
216                                      tipc_genl_family.maxattr,
217                                      tipc_genl_family.policy, NULL);
218         if (err)
219                 goto err_out;
220
221         do {
222                 int rem;
223
224                 len = (*cmd->dumpit)(buf, &cb);
225
226                 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
227                         err = nlmsg_parse_deprecated(nlmsg, GENL_HDRLEN,
228                                                      attrbuf,
229                                                      tipc_genl_family.maxattr,
230                                                      tipc_genl_family.policy,
231                                                      NULL);
232                         if (err)
233                                 goto err_out;
234
235                         err = (*cmd->format)(msg, attrbuf);
236                         if (err)
237                                 goto err_out;
238
239                         if (tipc_skb_tailroom(msg->rep) <= 1) {
240                                 err = -EMSGSIZE;
241                                 goto err_out;
242                         }
243                 }
244
245                 skb_reset_tail_pointer(buf);
246                 buf->len = 0;
247
248         } while (len);
249
250         err = 0;
251
252 err_out:
253         kfree(attrbuf);
254         tipc_dump_done(&cb);
255         kfree_skb(buf);
256
257         if (err == -EMSGSIZE) {
258                 /* The legacy API only considered messages filling
259                  * "ULTRA_STRING_MAX_LEN" to be truncated.
260                  */
261                 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
262                         char *tail = skb_tail_pointer(msg->rep);
263
264                         if (*tail != '\0')
265                                 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
266                                         REPLY_TRUNCATED);
267                 }
268
269                 return 0;
270         }
271
272         return err;
273 }
274
275 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
276                                  struct tipc_nl_compat_msg *msg)
277 {
278         int err;
279         struct sk_buff *arg;
280
281         if (msg->req_type && (!msg->req_size ||
282                               !TLV_CHECK_TYPE(msg->req, msg->req_type)))
283                 return -EINVAL;
284
285         msg->rep = tipc_tlv_alloc(msg->rep_size);
286         if (!msg->rep)
287                 return -ENOMEM;
288
289         if (msg->rep_type)
290                 tipc_tlv_init(msg->rep, msg->rep_type);
291
292         if (cmd->header) {
293                 err = (*cmd->header)(msg);
294                 if (err) {
295                         kfree_skb(msg->rep);
296                         msg->rep = NULL;
297                         return err;
298                 }
299         }
300
301         arg = nlmsg_new(0, GFP_KERNEL);
302         if (!arg) {
303                 kfree_skb(msg->rep);
304                 msg->rep = NULL;
305                 return -ENOMEM;
306         }
307
308         err = __tipc_nl_compat_dumpit(cmd, msg, arg);
309         if (err) {
310                 kfree_skb(msg->rep);
311                 msg->rep = NULL;
312         }
313         kfree_skb(arg);
314
315         return err;
316 }
317
318 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
319                                  struct tipc_nl_compat_msg *msg)
320 {
321         int err;
322         struct sk_buff *doit_buf;
323         struct sk_buff *trans_buf;
324         struct nlattr **attrbuf;
325         struct genl_info info;
326
327         trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
328         if (!trans_buf)
329                 return -ENOMEM;
330
331         attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1,
332                                 sizeof(struct nlattr *),
333                                 GFP_KERNEL);
334         if (!attrbuf) {
335                 err = -ENOMEM;
336                 goto trans_out;
337         }
338
339         doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
340         if (!doit_buf) {
341                 err = -ENOMEM;
342                 goto attrbuf_out;
343         }
344
345         memset(&info, 0, sizeof(info));
346         info.attrs = attrbuf;
347
348         rtnl_lock();
349         err = (*cmd->transcode)(cmd, trans_buf, msg);
350         if (err)
351                 goto doit_out;
352
353         err = nla_parse_deprecated(attrbuf, tipc_genl_family.maxattr,
354                                    (const struct nlattr *)trans_buf->data,
355                                    trans_buf->len, NULL, NULL);
356         if (err)
357                 goto doit_out;
358
359         doit_buf->sk = msg->dst_sk;
360
361         err = (*cmd->doit)(doit_buf, &info);
362 doit_out:
363         rtnl_unlock();
364
365         kfree_skb(doit_buf);
366 attrbuf_out:
367         kfree(attrbuf);
368 trans_out:
369         kfree_skb(trans_buf);
370
371         return err;
372 }
373
374 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
375                                struct tipc_nl_compat_msg *msg)
376 {
377         int err;
378
379         if (msg->req_type && (!msg->req_size ||
380                               !TLV_CHECK_TYPE(msg->req, msg->req_type)))
381                 return -EINVAL;
382
383         err = __tipc_nl_compat_doit(cmd, msg);
384         if (err)
385                 return err;
386
387         /* The legacy API considered an empty message a success message */
388         msg->rep = tipc_tlv_alloc(0);
389         if (!msg->rep)
390                 return -ENOMEM;
391
392         return 0;
393 }
394
395 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
396                                       struct nlattr **attrs)
397 {
398         struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
399         int err;
400
401         if (!attrs[TIPC_NLA_BEARER])
402                 return -EINVAL;
403
404         err = nla_parse_nested_deprecated(bearer, TIPC_NLA_BEARER_MAX,
405                                           attrs[TIPC_NLA_BEARER], NULL, NULL);
406         if (err)
407                 return err;
408
409         return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
410                             nla_data(bearer[TIPC_NLA_BEARER_NAME]),
411                             nla_len(bearer[TIPC_NLA_BEARER_NAME]));
412 }
413
414 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
415                                         struct sk_buff *skb,
416                                         struct tipc_nl_compat_msg *msg)
417 {
418         struct nlattr *prop;
419         struct nlattr *bearer;
420         struct tipc_bearer_config *b;
421         int len;
422
423         b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
424
425         bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
426         if (!bearer)
427                 return -EMSGSIZE;
428
429         len = TLV_GET_DATA_LEN(msg->req);
430         len -= offsetof(struct tipc_bearer_config, name);
431         if (len <= 0)
432                 return -EINVAL;
433
434         len = min_t(int, len, TIPC_MAX_BEARER_NAME);
435         if (!string_is_valid(b->name, len))
436                 return -EINVAL;
437
438         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
439                 return -EMSGSIZE;
440
441         if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
442                 return -EMSGSIZE;
443
444         if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
445                 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
446                 if (!prop)
447                         return -EMSGSIZE;
448                 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
449                         return -EMSGSIZE;
450                 nla_nest_end(skb, prop);
451         }
452         nla_nest_end(skb, bearer);
453
454         return 0;
455 }
456
457 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
458                                          struct sk_buff *skb,
459                                          struct tipc_nl_compat_msg *msg)
460 {
461         char *name;
462         struct nlattr *bearer;
463         int len;
464
465         name = (char *)TLV_DATA(msg->req);
466
467         bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
468         if (!bearer)
469                 return -EMSGSIZE;
470
471         len = TLV_GET_DATA_LEN(msg->req);
472         if (len <= 0)
473                 return -EINVAL;
474
475         len = min_t(int, len, TIPC_MAX_BEARER_NAME);
476         if (!string_is_valid(name, len))
477                 return -EINVAL;
478
479         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
480                 return -EMSGSIZE;
481
482         nla_nest_end(skb, bearer);
483
484         return 0;
485 }
486
487 static inline u32 perc(u32 count, u32 total)
488 {
489         return (count * 100 + (total / 2)) / total;
490 }
491
492 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
493                                 struct nlattr *prop[], struct nlattr *stats[])
494 {
495         tipc_tlv_sprintf(msg->rep, "  Window:%u packets\n",
496                          nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
497
498         tipc_tlv_sprintf(msg->rep,
499                          "  RX packets:%u fragments:%u/%u bundles:%u/%u\n",
500                          nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
501                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
502                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
503                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
504                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
505
506         tipc_tlv_sprintf(msg->rep,
507                          "  TX packets:%u fragments:%u/%u bundles:%u/%u\n",
508                          nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
509                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
510                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
511                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
512                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
513
514         tipc_tlv_sprintf(msg->rep, "  RX naks:%u defs:%u dups:%u\n",
515                          nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
516                          nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
517                          nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
518
519         tipc_tlv_sprintf(msg->rep, "  TX naks:%u acks:%u dups:%u\n",
520                          nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
521                          nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
522                          nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
523
524         tipc_tlv_sprintf(msg->rep,
525                          "  Congestion link:%u  Send queue max:%u avg:%u",
526                          nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
527                          nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
528                          nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
529 }
530
531 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
532                                          struct nlattr **attrs)
533 {
534         char *name;
535         struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
536         struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
537         struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
538         int err;
539         int len;
540
541         if (!attrs[TIPC_NLA_LINK])
542                 return -EINVAL;
543
544         err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
545                                           attrs[TIPC_NLA_LINK], NULL, NULL);
546         if (err)
547                 return err;
548
549         if (!link[TIPC_NLA_LINK_PROP])
550                 return -EINVAL;
551
552         err = nla_parse_nested_deprecated(prop, TIPC_NLA_PROP_MAX,
553                                           link[TIPC_NLA_LINK_PROP], NULL,
554                                           NULL);
555         if (err)
556                 return err;
557
558         if (!link[TIPC_NLA_LINK_STATS])
559                 return -EINVAL;
560
561         err = nla_parse_nested_deprecated(stats, TIPC_NLA_STATS_MAX,
562                                           link[TIPC_NLA_LINK_STATS], NULL,
563                                           NULL);
564         if (err)
565                 return err;
566
567         name = (char *)TLV_DATA(msg->req);
568
569         len = TLV_GET_DATA_LEN(msg->req);
570         if (len <= 0)
571                 return -EINVAL;
572
573         len = min_t(int, len, TIPC_MAX_LINK_NAME);
574         if (!string_is_valid(name, len))
575                 return -EINVAL;
576
577         if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
578                 return 0;
579
580         tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
581                          nla_data(link[TIPC_NLA_LINK_NAME]));
582
583         if (link[TIPC_NLA_LINK_BROADCAST]) {
584                 __fill_bc_link_stat(msg, prop, stats);
585                 return 0;
586         }
587
588         if (link[TIPC_NLA_LINK_ACTIVE])
589                 tipc_tlv_sprintf(msg->rep, "  ACTIVE");
590         else if (link[TIPC_NLA_LINK_UP])
591                 tipc_tlv_sprintf(msg->rep, "  STANDBY");
592         else
593                 tipc_tlv_sprintf(msg->rep, "  DEFUNCT");
594
595         tipc_tlv_sprintf(msg->rep, "  MTU:%u  Priority:%u",
596                          nla_get_u32(link[TIPC_NLA_LINK_MTU]),
597                          nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
598
599         tipc_tlv_sprintf(msg->rep, "  Tolerance:%u ms  Window:%u packets\n",
600                          nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
601                          nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
602
603         tipc_tlv_sprintf(msg->rep,
604                          "  RX packets:%u fragments:%u/%u bundles:%u/%u\n",
605                          nla_get_u32(link[TIPC_NLA_LINK_RX]) -
606                          nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
607                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
608                          nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
609                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
610                          nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
611
612         tipc_tlv_sprintf(msg->rep,
613                          "  TX packets:%u fragments:%u/%u bundles:%u/%u\n",
614                          nla_get_u32(link[TIPC_NLA_LINK_TX]) -
615                          nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
616                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
617                          nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
618                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
619                          nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
620
621         tipc_tlv_sprintf(msg->rep,
622                          "  TX profile sample:%u packets  average:%u octets\n",
623                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
624                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
625                          nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
626
627         tipc_tlv_sprintf(msg->rep,
628                          "  0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
629                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
630                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
631                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
632                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
633                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
634                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
635                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
636                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
637
638         tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
639                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
640                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
641                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
642                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
643                          perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
644                               nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
645
646         tipc_tlv_sprintf(msg->rep,
647                          "  RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
648                          nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
649                          nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
650                          nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
651                          nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
652                          nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
653
654         tipc_tlv_sprintf(msg->rep,
655                          "  TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
656                          nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
657                          nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
658                          nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
659                          nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
660                          nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
661
662         tipc_tlv_sprintf(msg->rep,
663                          "  Congestion link:%u  Send queue max:%u avg:%u",
664                          nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
665                          nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
666                          nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
667
668         return 0;
669 }
670
671 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
672                                     struct nlattr **attrs)
673 {
674         struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
675         struct tipc_link_info link_info;
676         int err;
677
678         if (!attrs[TIPC_NLA_LINK])
679                 return -EINVAL;
680
681         err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
682                                           attrs[TIPC_NLA_LINK], NULL, NULL);
683         if (err)
684                 return err;
685
686         link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
687         link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
688         nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME],
689                     TIPC_MAX_LINK_NAME);
690
691         return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
692                             &link_info, sizeof(link_info));
693 }
694
695 static int __tipc_add_link_prop(struct sk_buff *skb,
696                                 struct tipc_nl_compat_msg *msg,
697                                 struct tipc_link_config *lc)
698 {
699         switch (msg->cmd) {
700         case TIPC_CMD_SET_LINK_PRI:
701                 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
702         case TIPC_CMD_SET_LINK_TOL:
703                 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
704         case TIPC_CMD_SET_LINK_WINDOW:
705                 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
706         }
707
708         return -EINVAL;
709 }
710
711 static int tipc_nl_compat_media_set(struct sk_buff *skb,
712                                     struct tipc_nl_compat_msg *msg)
713 {
714         struct nlattr *prop;
715         struct nlattr *media;
716         struct tipc_link_config *lc;
717
718         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
719
720         media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA);
721         if (!media)
722                 return -EMSGSIZE;
723
724         if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
725                 return -EMSGSIZE;
726
727         prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_PROP);
728         if (!prop)
729                 return -EMSGSIZE;
730
731         __tipc_add_link_prop(skb, msg, lc);
732         nla_nest_end(skb, prop);
733         nla_nest_end(skb, media);
734
735         return 0;
736 }
737
738 static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
739                                      struct tipc_nl_compat_msg *msg)
740 {
741         struct nlattr *prop;
742         struct nlattr *bearer;
743         struct tipc_link_config *lc;
744
745         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
746
747         bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
748         if (!bearer)
749                 return -EMSGSIZE;
750
751         if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
752                 return -EMSGSIZE;
753
754         prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
755         if (!prop)
756                 return -EMSGSIZE;
757
758         __tipc_add_link_prop(skb, msg, lc);
759         nla_nest_end(skb, prop);
760         nla_nest_end(skb, bearer);
761
762         return 0;
763 }
764
765 static int __tipc_nl_compat_link_set(struct sk_buff *skb,
766                                      struct tipc_nl_compat_msg *msg)
767 {
768         struct nlattr *prop;
769         struct nlattr *link;
770         struct tipc_link_config *lc;
771
772         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
773
774         link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
775         if (!link)
776                 return -EMSGSIZE;
777
778         if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
779                 return -EMSGSIZE;
780
781         prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP);
782         if (!prop)
783                 return -EMSGSIZE;
784
785         __tipc_add_link_prop(skb, msg, lc);
786         nla_nest_end(skb, prop);
787         nla_nest_end(skb, link);
788
789         return 0;
790 }
791
792 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
793                                    struct sk_buff *skb,
794                                    struct tipc_nl_compat_msg *msg)
795 {
796         struct tipc_link_config *lc;
797         struct tipc_bearer *bearer;
798         struct tipc_media *media;
799         int len;
800
801         lc = (struct tipc_link_config *)TLV_DATA(msg->req);
802
803         len = TLV_GET_DATA_LEN(msg->req);
804         len -= offsetof(struct tipc_link_config, name);
805         if (len <= 0)
806                 return -EINVAL;
807
808         len = min_t(int, len, TIPC_MAX_LINK_NAME);
809         if (!string_is_valid(lc->name, len))
810                 return -EINVAL;
811
812         media = tipc_media_find(lc->name);
813         if (media) {
814                 cmd->doit = &__tipc_nl_media_set;
815                 return tipc_nl_compat_media_set(skb, msg);
816         }
817
818         bearer = tipc_bearer_find(msg->net, lc->name);
819         if (bearer) {
820                 cmd->doit = &__tipc_nl_bearer_set;
821                 return tipc_nl_compat_bearer_set(skb, msg);
822         }
823
824         return __tipc_nl_compat_link_set(skb, msg);
825 }
826
827 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
828                                            struct sk_buff *skb,
829                                            struct tipc_nl_compat_msg *msg)
830 {
831         char *name;
832         struct nlattr *link;
833         int len;
834
835         name = (char *)TLV_DATA(msg->req);
836
837         link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
838         if (!link)
839                 return -EMSGSIZE;
840
841         len = TLV_GET_DATA_LEN(msg->req);
842         if (len <= 0)
843                 return -EINVAL;
844
845         len = min_t(int, len, TIPC_MAX_LINK_NAME);
846         if (!string_is_valid(name, len))
847                 return -EINVAL;
848
849         if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
850                 return -EMSGSIZE;
851
852         nla_nest_end(skb, link);
853
854         return 0;
855 }
856
857 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
858 {
859         int i;
860         u32 depth;
861         struct tipc_name_table_query *ntq;
862         static const char * const header[] = {
863                 "Type       ",
864                 "Lower      Upper      ",
865                 "Port Identity              ",
866                 "Publication Scope"
867         };
868
869         ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
870         if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query))
871                 return -EINVAL;
872
873         depth = ntohl(ntq->depth);
874
875         if (depth > 4)
876                 depth = 4;
877         for (i = 0; i < depth; i++)
878                 tipc_tlv_sprintf(msg->rep, header[i]);
879         tipc_tlv_sprintf(msg->rep, "\n");
880
881         return 0;
882 }
883
884 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
885                                           struct nlattr **attrs)
886 {
887         char port_str[27];
888         struct tipc_name_table_query *ntq;
889         struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
890         struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
891         u32 node, depth, type, lowbound, upbound;
892         static const char * const scope_str[] = {"", " zone", " cluster",
893                                                  " node"};
894         int err;
895
896         if (!attrs[TIPC_NLA_NAME_TABLE])
897                 return -EINVAL;
898
899         err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX,
900                                           attrs[TIPC_NLA_NAME_TABLE], NULL,
901                                           NULL);
902         if (err)
903                 return err;
904
905         if (!nt[TIPC_NLA_NAME_TABLE_PUBL])
906                 return -EINVAL;
907
908         err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
909                                           nt[TIPC_NLA_NAME_TABLE_PUBL], NULL,
910                                           NULL);
911         if (err)
912                 return err;
913
914         ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
915
916         depth = ntohl(ntq->depth);
917         type = ntohl(ntq->type);
918         lowbound = ntohl(ntq->lowbound);
919         upbound = ntohl(ntq->upbound);
920
921         if (!(depth & TIPC_NTQ_ALLTYPES) &&
922             (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
923                 return 0;
924         if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
925                 return 0;
926         if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
927                 return 0;
928
929         tipc_tlv_sprintf(msg->rep, "%-10u ",
930                          nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
931
932         if (depth == 1)
933                 goto out;
934
935         tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
936                          nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
937                          nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
938
939         if (depth == 2)
940                 goto out;
941
942         node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
943         sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
944                 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
945         tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
946
947         if (depth == 3)
948                 goto out;
949
950         tipc_tlv_sprintf(msg->rep, "%-10u %s",
951                          nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
952                          scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
953 out:
954         tipc_tlv_sprintf(msg->rep, "\n");
955
956         return 0;
957 }
958
959 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
960                                       struct nlattr **attrs)
961 {
962         u32 type, lower, upper;
963         struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
964         int err;
965
966         if (!attrs[TIPC_NLA_PUBL])
967                 return -EINVAL;
968
969         err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
970                                           attrs[TIPC_NLA_PUBL], NULL, NULL);
971         if (err)
972                 return err;
973
974         type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
975         lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
976         upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
977
978         if (lower == upper)
979                 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
980         else
981                 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
982
983         return 0;
984 }
985
986 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
987 {
988         int err;
989         void *hdr;
990         struct nlattr *nest;
991         struct sk_buff *args;
992         struct tipc_nl_compat_cmd_dump dump;
993
994         args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
995         if (!args)
996                 return -ENOMEM;
997
998         hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
999                           TIPC_NL_PUBL_GET);
1000         if (!hdr) {
1001                 kfree_skb(args);
1002                 return -EMSGSIZE;
1003         }
1004
1005         nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK);
1006         if (!nest) {
1007                 kfree_skb(args);
1008                 return -EMSGSIZE;
1009         }
1010
1011         if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
1012                 kfree_skb(args);
1013                 return -EMSGSIZE;
1014         }
1015
1016         nla_nest_end(args, nest);
1017         genlmsg_end(args, hdr);
1018
1019         dump.dumpit = tipc_nl_publ_dump;
1020         dump.format = __tipc_nl_compat_publ_dump;
1021
1022         err = __tipc_nl_compat_dumpit(&dump, msg, args);
1023
1024         kfree_skb(args);
1025
1026         return err;
1027 }
1028
1029 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
1030                                   struct nlattr **attrs)
1031 {
1032         int err;
1033         u32 sock_ref;
1034         struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
1035
1036         if (!attrs[TIPC_NLA_SOCK])
1037                 return -EINVAL;
1038
1039         err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX,
1040                                           attrs[TIPC_NLA_SOCK], NULL, NULL);
1041         if (err)
1042                 return err;
1043
1044         sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
1045         tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
1046
1047         if (sock[TIPC_NLA_SOCK_CON]) {
1048                 u32 node;
1049                 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
1050
1051                 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX,
1052                                                   sock[TIPC_NLA_SOCK_CON],
1053                                                   NULL, NULL);
1054
1055                 if (err)
1056                         return err;
1057
1058                 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
1059                 tipc_tlv_sprintf(msg->rep, "  connected to <%u.%u.%u:%u>",
1060                                  tipc_zone(node),
1061                                  tipc_cluster(node),
1062                                  tipc_node(node),
1063                                  nla_get_u32(con[TIPC_NLA_CON_SOCK]));
1064
1065                 if (con[TIPC_NLA_CON_FLAG])
1066                         tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
1067                                          nla_get_u32(con[TIPC_NLA_CON_TYPE]),
1068                                          nla_get_u32(con[TIPC_NLA_CON_INST]));
1069                 else
1070                         tipc_tlv_sprintf(msg->rep, "\n");
1071         } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
1072                 tipc_tlv_sprintf(msg->rep, " bound to");
1073
1074                 err = tipc_nl_compat_publ_dump(msg, sock_ref);
1075                 if (err)
1076                         return err;
1077         }
1078         tipc_tlv_sprintf(msg->rep, "\n");
1079
1080         return 0;
1081 }
1082
1083 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
1084                                      struct nlattr **attrs)
1085 {
1086         struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
1087         int err;
1088
1089         if (!attrs[TIPC_NLA_MEDIA])
1090                 return -EINVAL;
1091
1092         err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX,
1093                                           attrs[TIPC_NLA_MEDIA], NULL, NULL);
1094         if (err)
1095                 return err;
1096
1097         return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
1098                             nla_data(media[TIPC_NLA_MEDIA_NAME]),
1099                             nla_len(media[TIPC_NLA_MEDIA_NAME]));
1100 }
1101
1102 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
1103                                     struct nlattr **attrs)
1104 {
1105         struct tipc_node_info node_info;
1106         struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
1107         int err;
1108
1109         if (!attrs[TIPC_NLA_NODE])
1110                 return -EINVAL;
1111
1112         err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX,
1113                                           attrs[TIPC_NLA_NODE], NULL, NULL);
1114         if (err)
1115                 return err;
1116
1117         node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1118         node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1119
1120         return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1121                             sizeof(node_info));
1122 }
1123
1124 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1125                                   struct sk_buff *skb,
1126                                   struct tipc_nl_compat_msg *msg)
1127 {
1128         u32 val;
1129         struct nlattr *net;
1130
1131         val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1132
1133         net = nla_nest_start_noflag(skb, TIPC_NLA_NET);
1134         if (!net)
1135                 return -EMSGSIZE;
1136
1137         if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1138                 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1139                         return -EMSGSIZE;
1140         } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1141                 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1142                         return -EMSGSIZE;
1143         }
1144         nla_nest_end(skb, net);
1145
1146         return 0;
1147 }
1148
1149 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1150                                    struct nlattr **attrs)
1151 {
1152         __be32 id;
1153         struct nlattr *net[TIPC_NLA_NET_MAX + 1];
1154         int err;
1155
1156         if (!attrs[TIPC_NLA_NET])
1157                 return -EINVAL;
1158
1159         err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX,
1160                                           attrs[TIPC_NLA_NET], NULL, NULL);
1161         if (err)
1162                 return err;
1163
1164         id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1165
1166         return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1167 }
1168
1169 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1170 {
1171         msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1172         if (!msg->rep)
1173                 return -ENOMEM;
1174
1175         tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1176         tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1177
1178         return 0;
1179 }
1180
1181 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1182 {
1183         struct tipc_nl_compat_cmd_dump dump;
1184         struct tipc_nl_compat_cmd_doit doit;
1185
1186         memset(&dump, 0, sizeof(dump));
1187         memset(&doit, 0, sizeof(doit));
1188
1189         switch (msg->cmd) {
1190         case TIPC_CMD_NOOP:
1191                 msg->rep = tipc_tlv_alloc(0);
1192                 if (!msg->rep)
1193                         return -ENOMEM;
1194                 return 0;
1195         case TIPC_CMD_GET_BEARER_NAMES:
1196                 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1197                 dump.dumpit = tipc_nl_bearer_dump;
1198                 dump.format = tipc_nl_compat_bearer_dump;
1199                 return tipc_nl_compat_dumpit(&dump, msg);
1200         case TIPC_CMD_ENABLE_BEARER:
1201                 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1202                 doit.doit = __tipc_nl_bearer_enable;
1203                 doit.transcode = tipc_nl_compat_bearer_enable;
1204                 return tipc_nl_compat_doit(&doit, msg);
1205         case TIPC_CMD_DISABLE_BEARER:
1206                 msg->req_type = TIPC_TLV_BEARER_NAME;
1207                 doit.doit = __tipc_nl_bearer_disable;
1208                 doit.transcode = tipc_nl_compat_bearer_disable;
1209                 return tipc_nl_compat_doit(&doit, msg);
1210         case TIPC_CMD_SHOW_LINK_STATS:
1211                 msg->req_type = TIPC_TLV_LINK_NAME;
1212                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1213                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1214                 dump.dumpit = tipc_nl_node_dump_link;
1215                 dump.format = tipc_nl_compat_link_stat_dump;
1216                 return tipc_nl_compat_dumpit(&dump, msg);
1217         case TIPC_CMD_GET_LINKS:
1218                 msg->req_type = TIPC_TLV_NET_ADDR;
1219                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1220                 dump.dumpit = tipc_nl_node_dump_link;
1221                 dump.format = tipc_nl_compat_link_dump;
1222                 return tipc_nl_compat_dumpit(&dump, msg);
1223         case TIPC_CMD_SET_LINK_TOL:
1224         case TIPC_CMD_SET_LINK_PRI:
1225         case TIPC_CMD_SET_LINK_WINDOW:
1226                 msg->req_type =  TIPC_TLV_LINK_CONFIG;
1227                 doit.doit = tipc_nl_node_set_link;
1228                 doit.transcode = tipc_nl_compat_link_set;
1229                 return tipc_nl_compat_doit(&doit, msg);
1230         case TIPC_CMD_RESET_LINK_STATS:
1231                 msg->req_type = TIPC_TLV_LINK_NAME;
1232                 doit.doit = tipc_nl_node_reset_link_stats;
1233                 doit.transcode = tipc_nl_compat_link_reset_stats;
1234                 return tipc_nl_compat_doit(&doit, msg);
1235         case TIPC_CMD_SHOW_NAME_TABLE:
1236                 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1237                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1238                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1239                 dump.header = tipc_nl_compat_name_table_dump_header;
1240                 dump.dumpit = tipc_nl_name_table_dump;
1241                 dump.format = tipc_nl_compat_name_table_dump;
1242                 return tipc_nl_compat_dumpit(&dump, msg);
1243         case TIPC_CMD_SHOW_PORTS:
1244                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1245                 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1246                 dump.dumpit = tipc_nl_sk_dump;
1247                 dump.format = tipc_nl_compat_sk_dump;
1248                 return tipc_nl_compat_dumpit(&dump, msg);
1249         case TIPC_CMD_GET_MEDIA_NAMES:
1250                 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1251                 dump.dumpit = tipc_nl_media_dump;
1252                 dump.format = tipc_nl_compat_media_dump;
1253                 return tipc_nl_compat_dumpit(&dump, msg);
1254         case TIPC_CMD_GET_NODES:
1255                 msg->rep_size = ULTRA_STRING_MAX_LEN;
1256                 dump.dumpit = tipc_nl_node_dump;
1257                 dump.format = tipc_nl_compat_node_dump;
1258                 return tipc_nl_compat_dumpit(&dump, msg);
1259         case TIPC_CMD_SET_NODE_ADDR:
1260                 msg->req_type = TIPC_TLV_NET_ADDR;
1261                 doit.doit = __tipc_nl_net_set;
1262                 doit.transcode = tipc_nl_compat_net_set;
1263                 return tipc_nl_compat_doit(&doit, msg);
1264         case TIPC_CMD_SET_NETID:
1265                 msg->req_type = TIPC_TLV_UNSIGNED;
1266                 doit.doit = __tipc_nl_net_set;
1267                 doit.transcode = tipc_nl_compat_net_set;
1268                 return tipc_nl_compat_doit(&doit, msg);
1269         case TIPC_CMD_GET_NETID:
1270                 msg->rep_size = sizeof(u32);
1271                 dump.dumpit = tipc_nl_net_dump;
1272                 dump.format = tipc_nl_compat_net_dump;
1273                 return tipc_nl_compat_dumpit(&dump, msg);
1274         case TIPC_CMD_SHOW_STATS:
1275                 return tipc_cmd_show_stats_compat(msg);
1276         }
1277
1278         return -EOPNOTSUPP;
1279 }
1280
1281 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1282 {
1283         int err;
1284         int len;
1285         struct tipc_nl_compat_msg msg;
1286         struct nlmsghdr *req_nlh;
1287         struct nlmsghdr *rep_nlh;
1288         struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1289
1290         memset(&msg, 0, sizeof(msg));
1291
1292         req_nlh = (struct nlmsghdr *)skb->data;
1293         msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1294         msg.cmd = req_userhdr->cmd;
1295         msg.net = genl_info_net(info);
1296         msg.dst_sk = skb->sk;
1297
1298         if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1299                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1300                 err = -EACCES;
1301                 goto send;
1302         }
1303
1304         msg.req_size = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1305         if (msg.req_size && !TLV_OK(msg.req, msg.req_size)) {
1306                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1307                 err = -EOPNOTSUPP;
1308                 goto send;
1309         }
1310
1311         err = tipc_nl_compat_handle(&msg);
1312         if ((err == -EOPNOTSUPP) || (err == -EPERM))
1313                 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1314         else if (err == -EINVAL)
1315                 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1316 send:
1317         if (!msg.rep)
1318                 return err;
1319
1320         len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1321         skb_push(msg.rep, len);
1322         rep_nlh = nlmsg_hdr(msg.rep);
1323         memcpy(rep_nlh, info->nlhdr, len);
1324         rep_nlh->nlmsg_len = msg.rep->len;
1325         genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
1326
1327         return err;
1328 }
1329
1330 static const struct genl_ops tipc_genl_compat_ops[] = {
1331         {
1332                 .cmd            = TIPC_GENL_CMD,
1333                 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
1334                 .doit           = tipc_nl_compat_recv,
1335         },
1336 };
1337
1338 static struct genl_family tipc_genl_compat_family __ro_after_init = {
1339         .name           = TIPC_GENL_NAME,
1340         .version        = TIPC_GENL_VERSION,
1341         .hdrsize        = TIPC_GENL_HDRLEN,
1342         .maxattr        = 0,
1343         .netnsok        = true,
1344         .module         = THIS_MODULE,
1345         .ops            = tipc_genl_compat_ops,
1346         .n_ops          = ARRAY_SIZE(tipc_genl_compat_ops),
1347 };
1348
1349 int __init tipc_netlink_compat_start(void)
1350 {
1351         int res;
1352
1353         res = genl_register_family(&tipc_genl_compat_family);
1354         if (res) {
1355                 pr_err("Failed to register legacy compat interface\n");
1356                 return res;
1357         }
1358
1359         return 0;
1360 }
1361
1362 void tipc_netlink_compat_stop(void)
1363 {
1364         genl_unregister_family(&tipc_genl_compat_family);
1365 }