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Merge branch 'am335x-phy-fixes' into omap-for-v5.0/fixes-v2
[mirror_ubuntu-eoan-kernel.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 if (__tipc_dump_start(&cb, msg->net)) {
189 kfree_skb(buf);
190 return -ENOMEM;
191 }
192
193 do {
194 int rem;
195
196 len = (*cmd->dumpit)(buf, &cb);
197
198 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
199 struct nlattr **attrs;
200
201 err = tipc_nlmsg_parse(nlmsg, &attrs);
202 if (err)
203 goto err_out;
204
205 err = (*cmd->format)(msg, attrs);
206 if (err)
207 goto err_out;
208
209 if (tipc_skb_tailroom(msg->rep) <= 1) {
210 err = -EMSGSIZE;
211 goto err_out;
212 }
213 }
214
215 skb_reset_tail_pointer(buf);
216 buf->len = 0;
217
218 } while (len);
219
220 err = 0;
221
222 err_out:
223 tipc_dump_done(&cb);
224 kfree_skb(buf);
225
226 if (err == -EMSGSIZE) {
227 /* The legacy API only considered messages filling
228 * "ULTRA_STRING_MAX_LEN" to be truncated.
229 */
230 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
231 char *tail = skb_tail_pointer(msg->rep);
232
233 if (*tail != '\0')
234 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
235 REPLY_TRUNCATED);
236 }
237
238 return 0;
239 }
240
241 return err;
242 }
243
244 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
245 struct tipc_nl_compat_msg *msg)
246 {
247 int err;
248 struct sk_buff *arg;
249
250 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
251 return -EINVAL;
252
253 msg->rep = tipc_tlv_alloc(msg->rep_size);
254 if (!msg->rep)
255 return -ENOMEM;
256
257 if (msg->rep_type)
258 tipc_tlv_init(msg->rep, msg->rep_type);
259
260 if (cmd->header)
261 (*cmd->header)(msg);
262
263 arg = nlmsg_new(0, GFP_KERNEL);
264 if (!arg) {
265 kfree_skb(msg->rep);
266 msg->rep = NULL;
267 return -ENOMEM;
268 }
269
270 err = __tipc_nl_compat_dumpit(cmd, msg, arg);
271 if (err) {
272 kfree_skb(msg->rep);
273 msg->rep = NULL;
274 }
275 kfree_skb(arg);
276
277 return err;
278 }
279
280 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
281 struct tipc_nl_compat_msg *msg)
282 {
283 int err;
284 struct sk_buff *doit_buf;
285 struct sk_buff *trans_buf;
286 struct nlattr **attrbuf;
287 struct genl_info info;
288
289 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
290 if (!trans_buf)
291 return -ENOMEM;
292
293 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1,
294 sizeof(struct nlattr *),
295 GFP_KERNEL);
296 if (!attrbuf) {
297 err = -ENOMEM;
298 goto trans_out;
299 }
300
301 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
302 if (!doit_buf) {
303 err = -ENOMEM;
304 goto attrbuf_out;
305 }
306
307 memset(&info, 0, sizeof(info));
308 info.attrs = attrbuf;
309
310 rtnl_lock();
311 err = (*cmd->transcode)(cmd, trans_buf, msg);
312 if (err)
313 goto doit_out;
314
315 err = nla_parse(attrbuf, tipc_genl_family.maxattr,
316 (const struct nlattr *)trans_buf->data,
317 trans_buf->len, NULL, NULL);
318 if (err)
319 goto doit_out;
320
321 doit_buf->sk = msg->dst_sk;
322
323 err = (*cmd->doit)(doit_buf, &info);
324 doit_out:
325 rtnl_unlock();
326
327 kfree_skb(doit_buf);
328 attrbuf_out:
329 kfree(attrbuf);
330 trans_out:
331 kfree_skb(trans_buf);
332
333 return err;
334 }
335
336 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
337 struct tipc_nl_compat_msg *msg)
338 {
339 int err;
340
341 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
342 return -EINVAL;
343
344 err = __tipc_nl_compat_doit(cmd, msg);
345 if (err)
346 return err;
347
348 /* The legacy API considered an empty message a success message */
349 msg->rep = tipc_tlv_alloc(0);
350 if (!msg->rep)
351 return -ENOMEM;
352
353 return 0;
354 }
355
356 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
357 struct nlattr **attrs)
358 {
359 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
360 int err;
361
362 if (!attrs[TIPC_NLA_BEARER])
363 return -EINVAL;
364
365 err = nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX,
366 attrs[TIPC_NLA_BEARER], NULL, NULL);
367 if (err)
368 return err;
369
370 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
371 nla_data(bearer[TIPC_NLA_BEARER_NAME]),
372 nla_len(bearer[TIPC_NLA_BEARER_NAME]));
373 }
374
375 static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
376 struct sk_buff *skb,
377 struct tipc_nl_compat_msg *msg)
378 {
379 struct nlattr *prop;
380 struct nlattr *bearer;
381 struct tipc_bearer_config *b;
382
383 b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
384
385 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
386 if (!bearer)
387 return -EMSGSIZE;
388
389 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
390 return -EMSGSIZE;
391
392 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
393 return -EMSGSIZE;
394
395 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
396 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
397 if (!prop)
398 return -EMSGSIZE;
399 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
400 return -EMSGSIZE;
401 nla_nest_end(skb, prop);
402 }
403 nla_nest_end(skb, bearer);
404
405 return 0;
406 }
407
408 static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
409 struct sk_buff *skb,
410 struct tipc_nl_compat_msg *msg)
411 {
412 char *name;
413 struct nlattr *bearer;
414
415 name = (char *)TLV_DATA(msg->req);
416
417 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
418 if (!bearer)
419 return -EMSGSIZE;
420
421 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
422 return -EMSGSIZE;
423
424 nla_nest_end(skb, bearer);
425
426 return 0;
427 }
428
429 static inline u32 perc(u32 count, u32 total)
430 {
431 return (count * 100 + (total / 2)) / total;
432 }
433
434 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
435 struct nlattr *prop[], struct nlattr *stats[])
436 {
437 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
438 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
439
440 tipc_tlv_sprintf(msg->rep,
441 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
442 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
443 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
444 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
445 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
446 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
447
448 tipc_tlv_sprintf(msg->rep,
449 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
450 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
451 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
452 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
453 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
454 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
455
456 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
457 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
458 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
459 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
460
461 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
462 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
463 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
464 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
465
466 tipc_tlv_sprintf(msg->rep,
467 " Congestion link:%u Send queue max:%u avg:%u",
468 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
469 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
470 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
471 }
472
473 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
474 struct nlattr **attrs)
475 {
476 char *name;
477 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
478 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
479 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
480 int err;
481
482 if (!attrs[TIPC_NLA_LINK])
483 return -EINVAL;
484
485 err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK],
486 NULL, NULL);
487 if (err)
488 return err;
489
490 if (!link[TIPC_NLA_LINK_PROP])
491 return -EINVAL;
492
493 err = nla_parse_nested(prop, TIPC_NLA_PROP_MAX,
494 link[TIPC_NLA_LINK_PROP], NULL, NULL);
495 if (err)
496 return err;
497
498 if (!link[TIPC_NLA_LINK_STATS])
499 return -EINVAL;
500
501 err = nla_parse_nested(stats, TIPC_NLA_STATS_MAX,
502 link[TIPC_NLA_LINK_STATS], NULL, NULL);
503 if (err)
504 return err;
505
506 name = (char *)TLV_DATA(msg->req);
507 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
508 return 0;
509
510 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
511 nla_data(link[TIPC_NLA_LINK_NAME]));
512
513 if (link[TIPC_NLA_LINK_BROADCAST]) {
514 __fill_bc_link_stat(msg, prop, stats);
515 return 0;
516 }
517
518 if (link[TIPC_NLA_LINK_ACTIVE])
519 tipc_tlv_sprintf(msg->rep, " ACTIVE");
520 else if (link[TIPC_NLA_LINK_UP])
521 tipc_tlv_sprintf(msg->rep, " STANDBY");
522 else
523 tipc_tlv_sprintf(msg->rep, " DEFUNCT");
524
525 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
526 nla_get_u32(link[TIPC_NLA_LINK_MTU]),
527 nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
528
529 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
530 nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
531 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
532
533 tipc_tlv_sprintf(msg->rep,
534 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
535 nla_get_u32(link[TIPC_NLA_LINK_RX]) -
536 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
537 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
538 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
539 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
540 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
541
542 tipc_tlv_sprintf(msg->rep,
543 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
544 nla_get_u32(link[TIPC_NLA_LINK_TX]) -
545 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
546 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
547 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
548 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
549 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
550
551 tipc_tlv_sprintf(msg->rep,
552 " TX profile sample:%u packets average:%u octets\n",
553 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
554 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
555 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
556
557 tipc_tlv_sprintf(msg->rep,
558 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
559 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
560 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
561 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
562 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
563 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
564 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
565 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
566 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
567
568 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
569 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
570 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
571 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
572 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
573 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
574 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
575
576 tipc_tlv_sprintf(msg->rep,
577 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
578 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
579 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
580 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
581 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
582 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
583
584 tipc_tlv_sprintf(msg->rep,
585 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
586 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
587 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
588 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
589 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
590 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
591
592 tipc_tlv_sprintf(msg->rep,
593 " Congestion link:%u Send queue max:%u avg:%u",
594 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
595 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
596 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
597
598 return 0;
599 }
600
601 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
602 struct nlattr **attrs)
603 {
604 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
605 struct tipc_link_info link_info;
606 int err;
607
608 if (!attrs[TIPC_NLA_LINK])
609 return -EINVAL;
610
611 err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK],
612 NULL, NULL);
613 if (err)
614 return err;
615
616 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
617 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
618 nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME],
619 TIPC_MAX_LINK_NAME);
620
621 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
622 &link_info, sizeof(link_info));
623 }
624
625 static int __tipc_add_link_prop(struct sk_buff *skb,
626 struct tipc_nl_compat_msg *msg,
627 struct tipc_link_config *lc)
628 {
629 switch (msg->cmd) {
630 case TIPC_CMD_SET_LINK_PRI:
631 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
632 case TIPC_CMD_SET_LINK_TOL:
633 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
634 case TIPC_CMD_SET_LINK_WINDOW:
635 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
636 }
637
638 return -EINVAL;
639 }
640
641 static int tipc_nl_compat_media_set(struct sk_buff *skb,
642 struct tipc_nl_compat_msg *msg)
643 {
644 struct nlattr *prop;
645 struct nlattr *media;
646 struct tipc_link_config *lc;
647
648 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
649
650 media = nla_nest_start(skb, TIPC_NLA_MEDIA);
651 if (!media)
652 return -EMSGSIZE;
653
654 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
655 return -EMSGSIZE;
656
657 prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP);
658 if (!prop)
659 return -EMSGSIZE;
660
661 __tipc_add_link_prop(skb, msg, lc);
662 nla_nest_end(skb, prop);
663 nla_nest_end(skb, media);
664
665 return 0;
666 }
667
668 static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
669 struct tipc_nl_compat_msg *msg)
670 {
671 struct nlattr *prop;
672 struct nlattr *bearer;
673 struct tipc_link_config *lc;
674
675 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
676
677 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
678 if (!bearer)
679 return -EMSGSIZE;
680
681 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
682 return -EMSGSIZE;
683
684 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
685 if (!prop)
686 return -EMSGSIZE;
687
688 __tipc_add_link_prop(skb, msg, lc);
689 nla_nest_end(skb, prop);
690 nla_nest_end(skb, bearer);
691
692 return 0;
693 }
694
695 static int __tipc_nl_compat_link_set(struct sk_buff *skb,
696 struct tipc_nl_compat_msg *msg)
697 {
698 struct nlattr *prop;
699 struct nlattr *link;
700 struct tipc_link_config *lc;
701
702 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
703
704 link = nla_nest_start(skb, TIPC_NLA_LINK);
705 if (!link)
706 return -EMSGSIZE;
707
708 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
709 return -EMSGSIZE;
710
711 prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP);
712 if (!prop)
713 return -EMSGSIZE;
714
715 __tipc_add_link_prop(skb, msg, lc);
716 nla_nest_end(skb, prop);
717 nla_nest_end(skb, link);
718
719 return 0;
720 }
721
722 static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
723 struct sk_buff *skb,
724 struct tipc_nl_compat_msg *msg)
725 {
726 struct tipc_link_config *lc;
727 struct tipc_bearer *bearer;
728 struct tipc_media *media;
729
730 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
731
732 media = tipc_media_find(lc->name);
733 if (media) {
734 cmd->doit = &__tipc_nl_media_set;
735 return tipc_nl_compat_media_set(skb, msg);
736 }
737
738 bearer = tipc_bearer_find(msg->net, lc->name);
739 if (bearer) {
740 cmd->doit = &__tipc_nl_bearer_set;
741 return tipc_nl_compat_bearer_set(skb, msg);
742 }
743
744 return __tipc_nl_compat_link_set(skb, msg);
745 }
746
747 static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
748 struct sk_buff *skb,
749 struct tipc_nl_compat_msg *msg)
750 {
751 char *name;
752 struct nlattr *link;
753
754 name = (char *)TLV_DATA(msg->req);
755
756 link = nla_nest_start(skb, TIPC_NLA_LINK);
757 if (!link)
758 return -EMSGSIZE;
759
760 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
761 return -EMSGSIZE;
762
763 nla_nest_end(skb, link);
764
765 return 0;
766 }
767
768 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
769 {
770 int i;
771 u32 depth;
772 struct tipc_name_table_query *ntq;
773 static const char * const header[] = {
774 "Type ",
775 "Lower Upper ",
776 "Port Identity ",
777 "Publication Scope"
778 };
779
780 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
781
782 depth = ntohl(ntq->depth);
783
784 if (depth > 4)
785 depth = 4;
786 for (i = 0; i < depth; i++)
787 tipc_tlv_sprintf(msg->rep, header[i]);
788 tipc_tlv_sprintf(msg->rep, "\n");
789
790 return 0;
791 }
792
793 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
794 struct nlattr **attrs)
795 {
796 char port_str[27];
797 struct tipc_name_table_query *ntq;
798 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
799 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
800 u32 node, depth, type, lowbound, upbound;
801 static const char * const scope_str[] = {"", " zone", " cluster",
802 " node"};
803 int err;
804
805 if (!attrs[TIPC_NLA_NAME_TABLE])
806 return -EINVAL;
807
808 err = nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX,
809 attrs[TIPC_NLA_NAME_TABLE], NULL, NULL);
810 if (err)
811 return err;
812
813 if (!nt[TIPC_NLA_NAME_TABLE_PUBL])
814 return -EINVAL;
815
816 err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX,
817 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL, NULL);
818 if (err)
819 return err;
820
821 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
822
823 depth = ntohl(ntq->depth);
824 type = ntohl(ntq->type);
825 lowbound = ntohl(ntq->lowbound);
826 upbound = ntohl(ntq->upbound);
827
828 if (!(depth & TIPC_NTQ_ALLTYPES) &&
829 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
830 return 0;
831 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
832 return 0;
833 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
834 return 0;
835
836 tipc_tlv_sprintf(msg->rep, "%-10u ",
837 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
838
839 if (depth == 1)
840 goto out;
841
842 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
843 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
844 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
845
846 if (depth == 2)
847 goto out;
848
849 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
850 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
851 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
852 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
853
854 if (depth == 3)
855 goto out;
856
857 tipc_tlv_sprintf(msg->rep, "%-10u %s",
858 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
859 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
860 out:
861 tipc_tlv_sprintf(msg->rep, "\n");
862
863 return 0;
864 }
865
866 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
867 struct nlattr **attrs)
868 {
869 u32 type, lower, upper;
870 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
871 int err;
872
873 if (!attrs[TIPC_NLA_PUBL])
874 return -EINVAL;
875
876 err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL],
877 NULL, NULL);
878 if (err)
879 return err;
880
881 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
882 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
883 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
884
885 if (lower == upper)
886 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
887 else
888 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
889
890 return 0;
891 }
892
893 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
894 {
895 int err;
896 void *hdr;
897 struct nlattr *nest;
898 struct sk_buff *args;
899 struct tipc_nl_compat_cmd_dump dump;
900
901 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
902 if (!args)
903 return -ENOMEM;
904
905 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
906 TIPC_NL_PUBL_GET);
907 if (!hdr)
908 return -EMSGSIZE;
909
910 nest = nla_nest_start(args, TIPC_NLA_SOCK);
911 if (!nest) {
912 kfree_skb(args);
913 return -EMSGSIZE;
914 }
915
916 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
917 kfree_skb(args);
918 return -EMSGSIZE;
919 }
920
921 nla_nest_end(args, nest);
922 genlmsg_end(args, hdr);
923
924 dump.dumpit = tipc_nl_publ_dump;
925 dump.format = __tipc_nl_compat_publ_dump;
926
927 err = __tipc_nl_compat_dumpit(&dump, msg, args);
928
929 kfree_skb(args);
930
931 return err;
932 }
933
934 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
935 struct nlattr **attrs)
936 {
937 int err;
938 u32 sock_ref;
939 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
940
941 if (!attrs[TIPC_NLA_SOCK])
942 return -EINVAL;
943
944 err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK],
945 NULL, NULL);
946 if (err)
947 return err;
948
949 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
950 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
951
952 if (sock[TIPC_NLA_SOCK_CON]) {
953 u32 node;
954 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
955
956 err = nla_parse_nested(con, TIPC_NLA_CON_MAX,
957 sock[TIPC_NLA_SOCK_CON], NULL, NULL);
958
959 if (err)
960 return err;
961
962 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
963 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>",
964 tipc_zone(node),
965 tipc_cluster(node),
966 tipc_node(node),
967 nla_get_u32(con[TIPC_NLA_CON_SOCK]));
968
969 if (con[TIPC_NLA_CON_FLAG])
970 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
971 nla_get_u32(con[TIPC_NLA_CON_TYPE]),
972 nla_get_u32(con[TIPC_NLA_CON_INST]));
973 else
974 tipc_tlv_sprintf(msg->rep, "\n");
975 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
976 tipc_tlv_sprintf(msg->rep, " bound to");
977
978 err = tipc_nl_compat_publ_dump(msg, sock_ref);
979 if (err)
980 return err;
981 }
982 tipc_tlv_sprintf(msg->rep, "\n");
983
984 return 0;
985 }
986
987 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
988 struct nlattr **attrs)
989 {
990 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
991 int err;
992
993 if (!attrs[TIPC_NLA_MEDIA])
994 return -EINVAL;
995
996 err = nla_parse_nested(media, TIPC_NLA_MEDIA_MAX,
997 attrs[TIPC_NLA_MEDIA], NULL, NULL);
998 if (err)
999 return err;
1000
1001 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
1002 nla_data(media[TIPC_NLA_MEDIA_NAME]),
1003 nla_len(media[TIPC_NLA_MEDIA_NAME]));
1004 }
1005
1006 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
1007 struct nlattr **attrs)
1008 {
1009 struct tipc_node_info node_info;
1010 struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
1011 int err;
1012
1013 if (!attrs[TIPC_NLA_NODE])
1014 return -EINVAL;
1015
1016 err = nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE],
1017 NULL, NULL);
1018 if (err)
1019 return err;
1020
1021 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1022 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1023
1024 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1025 sizeof(node_info));
1026 }
1027
1028 static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1029 struct sk_buff *skb,
1030 struct tipc_nl_compat_msg *msg)
1031 {
1032 u32 val;
1033 struct nlattr *net;
1034
1035 val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1036
1037 net = nla_nest_start(skb, TIPC_NLA_NET);
1038 if (!net)
1039 return -EMSGSIZE;
1040
1041 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1042 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1043 return -EMSGSIZE;
1044 } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1045 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1046 return -EMSGSIZE;
1047 }
1048 nla_nest_end(skb, net);
1049
1050 return 0;
1051 }
1052
1053 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1054 struct nlattr **attrs)
1055 {
1056 __be32 id;
1057 struct nlattr *net[TIPC_NLA_NET_MAX + 1];
1058 int err;
1059
1060 if (!attrs[TIPC_NLA_NET])
1061 return -EINVAL;
1062
1063 err = nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET],
1064 NULL, NULL);
1065 if (err)
1066 return err;
1067
1068 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1069
1070 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1071 }
1072
1073 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1074 {
1075 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1076 if (!msg->rep)
1077 return -ENOMEM;
1078
1079 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1080 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1081
1082 return 0;
1083 }
1084
1085 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1086 {
1087 struct tipc_nl_compat_cmd_dump dump;
1088 struct tipc_nl_compat_cmd_doit doit;
1089
1090 memset(&dump, 0, sizeof(dump));
1091 memset(&doit, 0, sizeof(doit));
1092
1093 switch (msg->cmd) {
1094 case TIPC_CMD_NOOP:
1095 msg->rep = tipc_tlv_alloc(0);
1096 if (!msg->rep)
1097 return -ENOMEM;
1098 return 0;
1099 case TIPC_CMD_GET_BEARER_NAMES:
1100 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1101 dump.dumpit = tipc_nl_bearer_dump;
1102 dump.format = tipc_nl_compat_bearer_dump;
1103 return tipc_nl_compat_dumpit(&dump, msg);
1104 case TIPC_CMD_ENABLE_BEARER:
1105 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1106 doit.doit = __tipc_nl_bearer_enable;
1107 doit.transcode = tipc_nl_compat_bearer_enable;
1108 return tipc_nl_compat_doit(&doit, msg);
1109 case TIPC_CMD_DISABLE_BEARER:
1110 msg->req_type = TIPC_TLV_BEARER_NAME;
1111 doit.doit = __tipc_nl_bearer_disable;
1112 doit.transcode = tipc_nl_compat_bearer_disable;
1113 return tipc_nl_compat_doit(&doit, msg);
1114 case TIPC_CMD_SHOW_LINK_STATS:
1115 msg->req_type = TIPC_TLV_LINK_NAME;
1116 msg->rep_size = ULTRA_STRING_MAX_LEN;
1117 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1118 dump.dumpit = tipc_nl_node_dump_link;
1119 dump.format = tipc_nl_compat_link_stat_dump;
1120 return tipc_nl_compat_dumpit(&dump, msg);
1121 case TIPC_CMD_GET_LINKS:
1122 msg->req_type = TIPC_TLV_NET_ADDR;
1123 msg->rep_size = ULTRA_STRING_MAX_LEN;
1124 dump.dumpit = tipc_nl_node_dump_link;
1125 dump.format = tipc_nl_compat_link_dump;
1126 return tipc_nl_compat_dumpit(&dump, msg);
1127 case TIPC_CMD_SET_LINK_TOL:
1128 case TIPC_CMD_SET_LINK_PRI:
1129 case TIPC_CMD_SET_LINK_WINDOW:
1130 msg->req_type = TIPC_TLV_LINK_CONFIG;
1131 doit.doit = tipc_nl_node_set_link;
1132 doit.transcode = tipc_nl_compat_link_set;
1133 return tipc_nl_compat_doit(&doit, msg);
1134 case TIPC_CMD_RESET_LINK_STATS:
1135 msg->req_type = TIPC_TLV_LINK_NAME;
1136 doit.doit = tipc_nl_node_reset_link_stats;
1137 doit.transcode = tipc_nl_compat_link_reset_stats;
1138 return tipc_nl_compat_doit(&doit, msg);
1139 case TIPC_CMD_SHOW_NAME_TABLE:
1140 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1141 msg->rep_size = ULTRA_STRING_MAX_LEN;
1142 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1143 dump.header = tipc_nl_compat_name_table_dump_header;
1144 dump.dumpit = tipc_nl_name_table_dump;
1145 dump.format = tipc_nl_compat_name_table_dump;
1146 return tipc_nl_compat_dumpit(&dump, msg);
1147 case TIPC_CMD_SHOW_PORTS:
1148 msg->rep_size = ULTRA_STRING_MAX_LEN;
1149 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1150 dump.dumpit = tipc_nl_sk_dump;
1151 dump.format = tipc_nl_compat_sk_dump;
1152 return tipc_nl_compat_dumpit(&dump, msg);
1153 case TIPC_CMD_GET_MEDIA_NAMES:
1154 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1155 dump.dumpit = tipc_nl_media_dump;
1156 dump.format = tipc_nl_compat_media_dump;
1157 return tipc_nl_compat_dumpit(&dump, msg);
1158 case TIPC_CMD_GET_NODES:
1159 msg->rep_size = ULTRA_STRING_MAX_LEN;
1160 dump.dumpit = tipc_nl_node_dump;
1161 dump.format = tipc_nl_compat_node_dump;
1162 return tipc_nl_compat_dumpit(&dump, msg);
1163 case TIPC_CMD_SET_NODE_ADDR:
1164 msg->req_type = TIPC_TLV_NET_ADDR;
1165 doit.doit = __tipc_nl_net_set;
1166 doit.transcode = tipc_nl_compat_net_set;
1167 return tipc_nl_compat_doit(&doit, msg);
1168 case TIPC_CMD_SET_NETID:
1169 msg->req_type = TIPC_TLV_UNSIGNED;
1170 doit.doit = __tipc_nl_net_set;
1171 doit.transcode = tipc_nl_compat_net_set;
1172 return tipc_nl_compat_doit(&doit, msg);
1173 case TIPC_CMD_GET_NETID:
1174 msg->rep_size = sizeof(u32);
1175 dump.dumpit = tipc_nl_net_dump;
1176 dump.format = tipc_nl_compat_net_dump;
1177 return tipc_nl_compat_dumpit(&dump, msg);
1178 case TIPC_CMD_SHOW_STATS:
1179 return tipc_cmd_show_stats_compat(msg);
1180 }
1181
1182 return -EOPNOTSUPP;
1183 }
1184
1185 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1186 {
1187 int err;
1188 int len;
1189 struct tipc_nl_compat_msg msg;
1190 struct nlmsghdr *req_nlh;
1191 struct nlmsghdr *rep_nlh;
1192 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1193
1194 memset(&msg, 0, sizeof(msg));
1195
1196 req_nlh = (struct nlmsghdr *)skb->data;
1197 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1198 msg.cmd = req_userhdr->cmd;
1199 msg.net = genl_info_net(info);
1200 msg.dst_sk = skb->sk;
1201
1202 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1203 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1204 err = -EACCES;
1205 goto send;
1206 }
1207
1208 len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1209 if (len && !TLV_OK(msg.req, len)) {
1210 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1211 err = -EOPNOTSUPP;
1212 goto send;
1213 }
1214
1215 err = tipc_nl_compat_handle(&msg);
1216 if ((err == -EOPNOTSUPP) || (err == -EPERM))
1217 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1218 else if (err == -EINVAL)
1219 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1220 send:
1221 if (!msg.rep)
1222 return err;
1223
1224 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1225 skb_push(msg.rep, len);
1226 rep_nlh = nlmsg_hdr(msg.rep);
1227 memcpy(rep_nlh, info->nlhdr, len);
1228 rep_nlh->nlmsg_len = msg.rep->len;
1229 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
1230
1231 return err;
1232 }
1233
1234 static const struct genl_ops tipc_genl_compat_ops[] = {
1235 {
1236 .cmd = TIPC_GENL_CMD,
1237 .doit = tipc_nl_compat_recv,
1238 },
1239 };
1240
1241 static struct genl_family tipc_genl_compat_family __ro_after_init = {
1242 .name = TIPC_GENL_NAME,
1243 .version = TIPC_GENL_VERSION,
1244 .hdrsize = TIPC_GENL_HDRLEN,
1245 .maxattr = 0,
1246 .netnsok = true,
1247 .module = THIS_MODULE,
1248 .ops = tipc_genl_compat_ops,
1249 .n_ops = ARRAY_SIZE(tipc_genl_compat_ops),
1250 };
1251
1252 int __init tipc_netlink_compat_start(void)
1253 {
1254 int res;
1255
1256 res = genl_register_family(&tipc_genl_compat_family);
1257 if (res) {
1258 pr_err("Failed to register legacy compat interface\n");
1259 return res;
1260 }
1261
1262 return 0;
1263 }
1264
1265 void tipc_netlink_compat_stop(void)
1266 {
1267 genl_unregister_family(&tipc_genl_compat_family);
1268 }
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