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