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tipc: fix unlimited bundling of small messages
[linux-2.6-block.git] / net / tipc / netlink_compat.c
CommitLineData
bfb3e5dd
RA		 1/*
2 * Copyright (c) 2014, Ericsson AB
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the names of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * Alternatively, this software may be distributed under the terms of the
18 * GNU General Public License ("GPL") version 2 as published by the Free
19 * Software Foundation.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34#include "core.h"
d0796d1e 35#include "bearer.h"
f2b3b2d4 36#include "link.h"
44a8ae94 37#include "name_table.h"
487d2a3a 38#include "socket.h"
4b28cb58 39#include "node.h"
964f9501 40#include "net.h"
bfb3e5dd
RA		 41#include <net/genetlink.h>
42#include <linux/tipc_config.h>
43
d0796d1e
RA		 44/* The legacy API had an artificial message length limit called
45 * ULTRA_STRING_MAX_LEN.
46 */
47#define ULTRA_STRING_MAX_LEN 32768
48
49#define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN)
50
51#define REPLY_TRUNCATED "<truncated>\n"
52
53struct tipc_nl_compat_msg {
54 u16 cmd;
f2b3b2d4 55 int rep_type;
d0796d1e 56 int rep_size;
9ab15465 57 int req_type;
4da5f001 58 int req_size;
c3d6fb85 59 struct net *net;
d0796d1e
RA		 60 struct sk_buff *rep;
61 struct tlv_desc *req;
62 struct sock *dst_sk;
63};
64
65struct tipc_nl_compat_cmd_dump {
44a8ae94 66 int (*header)(struct tipc_nl_compat_msg *);
d0796d1e
RA		 67 int (*dumpit)(struct sk_buff *, struct netlink_callback *);
68 int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
69};
70
9ab15465
RA		 71struct tipc_nl_compat_cmd_doit {
72 int (*doit)(struct sk_buff *skb, struct genl_info *info);
c3d6fb85
RA		 73 int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd,
74 struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
9ab15465
RA		 75};
76
d0796d1e
RA		 77static 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
8b66fee7
YX		 91static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv)
92{
93 return TLV_GET_LEN(tlv) - TLV_SPACE(0);
94}
95
d0796d1e
RA		 96static 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
f2b3b2d4
RA		 112static 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
121static 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
d0796d1e
RA		 146static 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
163static 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
8b66fee7
YX		 175static inline bool string_is_valid(char *s, int len)
176{
177 return memchr(s, '\0', len) ? true : false;
178}
179
d0796d1e
RA		 180static 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;
12a78b02
CW		 199 if (__tipc_dump_start(&cb, msg->net)) {
200 kfree_skb(buf);
201 return -ENOMEM;
202 }
d0796d1e
RA		 203
204 do {
205 int rem;
206
207 len = (*cmd->dumpit)(buf, &cb);
208
209 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
210 struct nlattr **attrs;
211
212 err = tipc_nlmsg_parse(nlmsg, &attrs);
213 if (err)
214 goto err_out;
215
216 err = (*cmd->format)(msg, attrs);
217 if (err)
218 goto err_out;
219
220 if (tipc_skb_tailroom(msg->rep) <= 1) {
221 err = -EMSGSIZE;
222 goto err_out;
223 }
224 }
225
226 skb_reset_tail_pointer(buf);
227 buf->len = 0;
228
229 } while (len);
230
231 err = 0;
232
233err_out:
8f5c5fcf 234 tipc_dump_done(&cb);
d0796d1e
RA		 235 kfree_skb(buf);
236
237 if (err == -EMSGSIZE) {
238 /* The legacy API only considered messages filling
239 * "ULTRA_STRING_MAX_LEN" to be truncated.
240 */
241 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
242 char *tail = skb_tail_pointer(msg->rep);
243
244 if (*tail != '\0')
245 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
246 REPLY_TRUNCATED);
247 }
248
249 return 0;
250 }
251
252 return err;
253}
254
255static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
256 struct tipc_nl_compat_msg *msg)
257{
258 int err;
259 struct sk_buff *arg;
260
4da5f001
TK		 261 if (msg->req_type && (!msg->req_size ||
262 !TLV_CHECK_TYPE(msg->req, msg->req_type)))
f2b3b2d4
RA		 263 return -EINVAL;
264
d0796d1e
RA		 265 msg->rep = tipc_tlv_alloc(msg->rep_size);
266 if (!msg->rep)
267 return -ENOMEM;
268
f2b3b2d4
RA		 269 if (msg->rep_type)
270 tipc_tlv_init(msg->rep, msg->rep_type);
271
2ac695d1
XL		 272 if (cmd->header) {
273 err = (*cmd->header)(msg);
274 if (err) {
275 kfree_skb(msg->rep);
276 msg->rep = NULL;
277 return err;
278 }
279 }
44a8ae94 280
d0796d1e
RA		 281 arg = nlmsg_new(0, GFP_KERNEL);
282 if (!arg) {
283 kfree_skb(msg->rep);
5bfd37b4 284 msg->rep = NULL;
d0796d1e
RA		 285 return -ENOMEM;
286 }
287
288 err = __tipc_nl_compat_dumpit(cmd, msg, arg);
5bfd37b4 289 if (err) {
d0796d1e 290 kfree_skb(msg->rep);
5bfd37b4
ED		 291 msg->rep = NULL;
292 }
d0796d1e
RA		 293 kfree_skb(arg);
294
295 return err;
296}
297
9ab15465
RA		 298static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
299 struct tipc_nl_compat_msg *msg)
300{
301 int err;
302 struct sk_buff *doit_buf;
303 struct sk_buff *trans_buf;
304 struct nlattr **attrbuf;
305 struct genl_info info;
306
307 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
308 if (!trans_buf)
309 return -ENOMEM;
310
6da2ec56
KC		 311 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1,
312 sizeof(struct nlattr *),
313 GFP_KERNEL);
9ab15465
RA		 314 if (!attrbuf) {
315 err = -ENOMEM;
316 goto trans_out;
317 }
318
9ab15465
RA		 319 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
320 if (!doit_buf) {
321 err = -ENOMEM;
e5d1a1ee 322 goto attrbuf_out;
9ab15465
RA		 323 }
324
9ab15465
RA		 325 memset(&info, 0, sizeof(info));
326 info.attrs = attrbuf;
327
ed4ffdfe 328 rtnl_lock();
e5d1a1ee
YX		 329 err = (*cmd->transcode)(cmd, trans_buf, msg);
330 if (err)
331 goto doit_out;
332
8cb08174
JB		 333 err = nla_parse_deprecated(attrbuf, tipc_genl_family.maxattr,
334 (const struct nlattr *)trans_buf->data,
335 trans_buf->len, NULL, NULL);
e5d1a1ee
YX		 336 if (err)
337 goto doit_out;
338
339 doit_buf->sk = msg->dst_sk;
340
9ab15465 341 err = (*cmd->doit)(doit_buf, &info);
e5d1a1ee 342doit_out:
ed4ffdfe 343 rtnl_unlock();
9ab15465
RA		 344
345 kfree_skb(doit_buf);
e5d1a1ee 346attrbuf_out:
9ab15465
RA		 347 kfree(attrbuf);
348trans_out:
349 kfree_skb(trans_buf);
350
351 return err;
352}
353
354static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
355 struct tipc_nl_compat_msg *msg)
356{
357 int err;
358
4da5f001
TK		 359 if (msg->req_type && (!msg->req_size ||
360 !TLV_CHECK_TYPE(msg->req, msg->req_type)))
9ab15465
RA		 361 return -EINVAL;
362
363 err = __tipc_nl_compat_doit(cmd, msg);
364 if (err)
365 return err;
366
367 /* The legacy API considered an empty message a success message */
368 msg->rep = tipc_tlv_alloc(0);
369 if (!msg->rep)
370 return -ENOMEM;
371
372 return 0;
373}
374
d0796d1e
RA		 375static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
376 struct nlattr **attrs)
377{
378 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
297f7d2c
BD		 379 int err;
380
381 if (!attrs[TIPC_NLA_BEARER])
382 return -EINVAL;
d0796d1e 383
8cb08174
JB		 384 err = nla_parse_nested_deprecated(bearer, TIPC_NLA_BEARER_MAX,
385 attrs[TIPC_NLA_BEARER], NULL, NULL);
297f7d2c
BD		 386 if (err)
387 return err;
d0796d1e
RA		 388
389 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
390 nla_data(bearer[TIPC_NLA_BEARER_NAME]),
391 nla_len(bearer[TIPC_NLA_BEARER_NAME]));
392}
393
c3d6fb85
RA		 394static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
395 struct sk_buff *skb,
9ab15465
RA		 396 struct tipc_nl_compat_msg *msg)
397{
398 struct nlattr *prop;
399 struct nlattr *bearer;
400 struct tipc_bearer_config *b;
0762216c 401 int len;
9ab15465
RA		 402
403 b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
404
ae0be8de 405 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
9ab15465
RA		 406 if (!bearer)
407 return -EMSGSIZE;
408
6f07e5f0
XL		 409 len = TLV_GET_DATA_LEN(msg->req);
410 len -= offsetof(struct tipc_bearer_config, name);
411 if (len <= 0)
412 return -EINVAL;
413
414 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
0762216c
YX		 415 if (!string_is_valid(b->name, len))
416 return -EINVAL;
417
9ab15465
RA		 418 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
419 return -EMSGSIZE;
420
421 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
422 return -EMSGSIZE;
423
424 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
ae0be8de 425 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
9ab15465
RA		 426 if (!prop)
427 return -EMSGSIZE;
428 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
429 return -EMSGSIZE;
430 nla_nest_end(skb, prop);
431 }
432 nla_nest_end(skb, bearer);
433
434 return 0;
435}
436
c3d6fb85
RA		 437static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
438 struct sk_buff *skb,
9ab15465
RA		 439 struct tipc_nl_compat_msg *msg)
440{
441 char *name;
442 struct nlattr *bearer;
0762216c 443 int len;
9ab15465
RA		 444
445 name = (char *)TLV_DATA(msg->req);
446
ae0be8de 447 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
9ab15465
RA		 448 if (!bearer)
449 return -EMSGSIZE;
450
4f07b80c
XL		 451 len = TLV_GET_DATA_LEN(msg->req);
452 if (len <= 0)
453 return -EINVAL;
454
455 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
0762216c
YX		 456 if (!string_is_valid(name, len))
457 return -EINVAL;
458
9ab15465
RA		 459 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
460 return -EMSGSIZE;
461
462 nla_nest_end(skb, bearer);
463
464 return 0;
465}
466
f2b3b2d4
RA		 467static inline u32 perc(u32 count, u32 total)
468{
469 return (count * 100 + (total / 2)) / total;
470}
471
472static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
473 struct nlattr *prop[], struct nlattr *stats[])
474{
475 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
476 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
477
478 tipc_tlv_sprintf(msg->rep,
479 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
480 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
481 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
482 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
483 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
484 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
485
486 tipc_tlv_sprintf(msg->rep,
487 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
488 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
489 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
490 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
491 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
492 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
493
494 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
495 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
496 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
497 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
498
499 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
500 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
501 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
502 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
503
504 tipc_tlv_sprintf(msg->rep,
505 " Congestion link:%u Send queue max:%u avg:%u",
506 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
507 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
508 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
509}
510
511static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
512 struct nlattr **attrs)
513{
514 char *name;
515 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
516 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
517 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
297f7d2c 518 int err;
0762216c 519 int len;
f2b3b2d4 520
297f7d2c
BD		 521 if (!attrs[TIPC_NLA_LINK])
522 return -EINVAL;
f2b3b2d4 523
8cb08174
JB		 524 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
525 attrs[TIPC_NLA_LINK], NULL, NULL);
297f7d2c
BD		 526 if (err)
527 return err;
528
529 if (!link[TIPC_NLA_LINK_PROP])
530 return -EINVAL;
f2b3b2d4 531
8cb08174
JB		 532 err = nla_parse_nested_deprecated(prop, TIPC_NLA_PROP_MAX,
533 link[TIPC_NLA_LINK_PROP], NULL,
534 NULL);
297f7d2c
BD		 535 if (err)
536 return err;
537
538 if (!link[TIPC_NLA_LINK_STATS])
539 return -EINVAL;
540
8cb08174
JB		 541 err = nla_parse_nested_deprecated(stats, TIPC_NLA_STATS_MAX,
542 link[TIPC_NLA_LINK_STATS], NULL,
543 NULL);
297f7d2c
BD		 544 if (err)
545 return err;
f2b3b2d4
RA		 546
547 name = (char *)TLV_DATA(msg->req);
0762216c 548
4f07b80c
XL		 549 len = TLV_GET_DATA_LEN(msg->req);
550 if (len <= 0)
551 return -EINVAL;
552
553 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
0762216c
YX		 554 if (!string_is_valid(name, len))
555 return -EINVAL;
556
f2b3b2d4
RA		 557 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
558 return 0;
559
560 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
561 nla_data(link[TIPC_NLA_LINK_NAME]));
562
563 if (link[TIPC_NLA_LINK_BROADCAST]) {
564 __fill_bc_link_stat(msg, prop, stats);
565 return 0;
566 }
567
568 if (link[TIPC_NLA_LINK_ACTIVE])
569 tipc_tlv_sprintf(msg->rep, " ACTIVE");
570 else if (link[TIPC_NLA_LINK_UP])
571 tipc_tlv_sprintf(msg->rep, " STANDBY");
572 else
573 tipc_tlv_sprintf(msg->rep, " DEFUNCT");
574
575 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
576 nla_get_u32(link[TIPC_NLA_LINK_MTU]),
577 nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
578
579 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
580 nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
581 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
582
583 tipc_tlv_sprintf(msg->rep,
584 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
585 nla_get_u32(link[TIPC_NLA_LINK_RX]) -
586 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
587 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
588 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
589 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
590 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
591
592 tipc_tlv_sprintf(msg->rep,
593 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
594 nla_get_u32(link[TIPC_NLA_LINK_TX]) -
595 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
596 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
597 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
598 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
599 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
600
601 tipc_tlv_sprintf(msg->rep,
602 " TX profile sample:%u packets average:%u octets\n",
603 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
604 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
605 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
606
607 tipc_tlv_sprintf(msg->rep,
608 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
609 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
610 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
611 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
612 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
613 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
614 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
615 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
616 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
617
618 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
619 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
620 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
621 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
622 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
623 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
624 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
625
626 tipc_tlv_sprintf(msg->rep,
627 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
628 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
629 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
630 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
631 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
632 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
633
634 tipc_tlv_sprintf(msg->rep,
635 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
636 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
637 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
638 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
639 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
640 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
641
642 tipc_tlv_sprintf(msg->rep,
643 " Congestion link:%u Send queue max:%u avg:%u",
644 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
645 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
646 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
647
648 return 0;
649}
650
357ebdbf
RA		 651static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
652 struct nlattr **attrs)
653{
654 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
655 struct tipc_link_info link_info;
297f7d2c 656 int err;
357ebdbf 657
297f7d2c
BD		 658 if (!attrs[TIPC_NLA_LINK])
659 return -EINVAL;
660
8cb08174
JB		 661 err = nla_parse_nested_deprecated(link, TIPC_NLA_LINK_MAX,
662 attrs[TIPC_NLA_LINK], NULL, NULL);
297f7d2c
BD		 663 if (err)
664 return err;
357ebdbf
RA		 665
666 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
667 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
55e77a3e 668 nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME],
5d2be142 669 TIPC_MAX_LINK_NAME);
357ebdbf
RA		 670
671 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
672 &link_info, sizeof(link_info));
673}
674
c3d6fb85
RA		 675static int __tipc_add_link_prop(struct sk_buff *skb,
676 struct tipc_nl_compat_msg *msg,
677 struct tipc_link_config *lc)
678{
679 switch (msg->cmd) {
680 case TIPC_CMD_SET_LINK_PRI:
681 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
682 case TIPC_CMD_SET_LINK_TOL:
683 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
684 case TIPC_CMD_SET_LINK_WINDOW:
685 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
686 }
687
688 return -EINVAL;
689}
690
691static int tipc_nl_compat_media_set(struct sk_buff *skb,
692 struct tipc_nl_compat_msg *msg)
37e2d484 693{
37e2d484 694 struct nlattr *prop;
c3d6fb85
RA		 695 struct nlattr *media;
696 struct tipc_link_config *lc;
697
698 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
699
ae0be8de 700 media = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA);
c3d6fb85
RA		 701 if (!media)
702 return -EMSGSIZE;
703
704 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
705 return -EMSGSIZE;
706
ae0be8de 707 prop = nla_nest_start_noflag(skb, TIPC_NLA_MEDIA_PROP);
c3d6fb85
RA		 708 if (!prop)
709 return -EMSGSIZE;
710
711 __tipc_add_link_prop(skb, msg, lc);
712 nla_nest_end(skb, prop);
713 nla_nest_end(skb, media);
714
715 return 0;
716}
717
718static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
719 struct tipc_nl_compat_msg *msg)
720{
721 struct nlattr *prop;
722 struct nlattr *bearer;
723 struct tipc_link_config *lc;
724
725 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
726
ae0be8de 727 bearer = nla_nest_start_noflag(skb, TIPC_NLA_BEARER);
c3d6fb85
RA		 728 if (!bearer)
729 return -EMSGSIZE;
730
731 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
732 return -EMSGSIZE;
733
ae0be8de 734 prop = nla_nest_start_noflag(skb, TIPC_NLA_BEARER_PROP);
c3d6fb85
RA		 735 if (!prop)
736 return -EMSGSIZE;
737
738 __tipc_add_link_prop(skb, msg, lc);
739 nla_nest_end(skb, prop);
740 nla_nest_end(skb, bearer);
741
742 return 0;
743}
744
745static int __tipc_nl_compat_link_set(struct sk_buff *skb,
746 struct tipc_nl_compat_msg *msg)
747{
748 struct nlattr *prop;
749 struct nlattr *link;
37e2d484
RA		 750 struct tipc_link_config *lc;
751
752 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
753
ae0be8de 754 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
37e2d484
RA		 755 if (!link)
756 return -EMSGSIZE;
757
758 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
759 return -EMSGSIZE;
760
ae0be8de 761 prop = nla_nest_start_noflag(skb, TIPC_NLA_LINK_PROP);
37e2d484
RA		 762 if (!prop)
763 return -EMSGSIZE;
764
c3d6fb85 765 __tipc_add_link_prop(skb, msg, lc);
37e2d484
RA		 766 nla_nest_end(skb, prop);
767 nla_nest_end(skb, link);
768
769 return 0;
770}
771
c3d6fb85
RA		 772static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
773 struct sk_buff *skb,
774 struct tipc_nl_compat_msg *msg)
775{
776 struct tipc_link_config *lc;
777 struct tipc_bearer *bearer;
778 struct tipc_media *media;
edf5ff04 779 int len;
c3d6fb85
RA		 780
781 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
782
8c63bf9a
XL		 783 len = TLV_GET_DATA_LEN(msg->req);
784 len -= offsetof(struct tipc_link_config, name);
785 if (len <= 0)
786 return -EINVAL;
787
788 len = min_t(int, len, TIPC_MAX_LINK_NAME);
edf5ff04
YX		 789 if (!string_is_valid(lc->name, len))
790 return -EINVAL;
791
c3d6fb85
RA		 792 media = tipc_media_find(lc->name);
793 if (media) {
ed4ffdfe 794 cmd->doit = &__tipc_nl_media_set;
c3d6fb85
RA		 795 return tipc_nl_compat_media_set(skb, msg);
796 }
797
798 bearer = tipc_bearer_find(msg->net, lc->name);
799 if (bearer) {
ed4ffdfe 800 cmd->doit = &__tipc_nl_bearer_set;
c3d6fb85
RA		 801 return tipc_nl_compat_bearer_set(skb, msg);
802 }
803
804 return __tipc_nl_compat_link_set(skb, msg);
805}
806
807static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
808 struct sk_buff *skb,
1817877b
RA		 809 struct tipc_nl_compat_msg *msg)
810{
811 char *name;
812 struct nlattr *link;
8b66fee7 813 int len;
1817877b
RA		 814
815 name = (char *)TLV_DATA(msg->req);
816
ae0be8de 817 link = nla_nest_start_noflag(skb, TIPC_NLA_LINK);
1817877b
RA		 818 if (!link)
819 return -EMSGSIZE;
820
4f07b80c
XL		 821 len = TLV_GET_DATA_LEN(msg->req);
822 if (len <= 0)
823 return -EINVAL;
824
825 len = min_t(int, len, TIPC_MAX_BEARER_NAME);
8b66fee7
YX		 826 if (!string_is_valid(name, len))
827 return -EINVAL;
828
1817877b
RA		 829 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
830 return -EMSGSIZE;
831
832 nla_nest_end(skb, link);
833
834 return 0;
835}
836
44a8ae94
RA		 837static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
838{
839 int i;
840 u32 depth;
841 struct tipc_name_table_query *ntq;
842 static const char * const header[] = {
843 "Type ",
844 "Lower Upper ",
845 "Port Identity ",
846 "Publication Scope"
847 };
848
849 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
974cb0e3
YX		 850 if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query))
851 return -EINVAL;
44a8ae94
RA		 852
853 depth = ntohl(ntq->depth);
854
855 if (depth > 4)
856 depth = 4;
857 for (i = 0; i < depth; i++)
858 tipc_tlv_sprintf(msg->rep, header[i]);
859 tipc_tlv_sprintf(msg->rep, "\n");
860
861 return 0;
862}
863
864static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
865 struct nlattr **attrs)
866{
867 char port_str[27];
868 struct tipc_name_table_query *ntq;
869 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
870 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
871 u32 node, depth, type, lowbound, upbound;
872 static const char * const scope_str[] = {"", " zone", " cluster",
873 " node"};
297f7d2c 874 int err;
44a8ae94 875
297f7d2c
BD		 876 if (!attrs[TIPC_NLA_NAME_TABLE])
877 return -EINVAL;
44a8ae94 878
8cb08174
JB		 879 err = nla_parse_nested_deprecated(nt, TIPC_NLA_NAME_TABLE_MAX,
880 attrs[TIPC_NLA_NAME_TABLE], NULL,
881 NULL);
297f7d2c
BD		 882 if (err)
883 return err;
884
885 if (!nt[TIPC_NLA_NAME_TABLE_PUBL])
886 return -EINVAL;
887
8cb08174
JB		 888 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
889 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL,
890 NULL);
297f7d2c
BD		 891 if (err)
892 return err;
44a8ae94
RA		 893
894 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
895
896 depth = ntohl(ntq->depth);
897 type = ntohl(ntq->type);
898 lowbound = ntohl(ntq->lowbound);
899 upbound = ntohl(ntq->upbound);
900
901 if (!(depth & TIPC_NTQ_ALLTYPES) &&
902 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
903 return 0;
904 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
905 return 0;
906 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
907 return 0;
908
909 tipc_tlv_sprintf(msg->rep, "%-10u ",
910 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
911
912 if (depth == 1)
913 goto out;
914
915 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
916 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
917 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
918
919 if (depth == 2)
920 goto out;
921
922 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
923 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
924 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
925 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
926
927 if (depth == 3)
928 goto out;
929
930 tipc_tlv_sprintf(msg->rep, "%-10u %s",
03aaaa9b 931 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
44a8ae94
RA		 932 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
933out:
934 tipc_tlv_sprintf(msg->rep, "\n");
935
936 return 0;
937}
938
487d2a3a
RA		 939static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
940 struct nlattr **attrs)
941{
942 u32 type, lower, upper;
943 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
297f7d2c 944 int err;
487d2a3a 945
297f7d2c
BD		 946 if (!attrs[TIPC_NLA_PUBL])
947 return -EINVAL;
948
8cb08174
JB		 949 err = nla_parse_nested_deprecated(publ, TIPC_NLA_PUBL_MAX,
950 attrs[TIPC_NLA_PUBL], NULL, NULL);
297f7d2c
BD		 951 if (err)
952 return err;
487d2a3a
RA		 953
954 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
955 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
956 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
957
958 if (lower == upper)
959 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
960 else
961 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
962
963 return 0;
964}
965
966static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
967{
968 int err;
969 void *hdr;
970 struct nlattr *nest;
971 struct sk_buff *args;
972 struct tipc_nl_compat_cmd_dump dump;
973
974 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
975 if (!args)
976 return -ENOMEM;
977
978 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
979 TIPC_NL_PUBL_GET);
f87d8ad9
GS		 980 if (!hdr) {
981 kfree_skb(args);
46273cf7 982 return -EMSGSIZE;
f87d8ad9 983 }
487d2a3a 984
ae0be8de 985 nest = nla_nest_start_noflag(args, TIPC_NLA_SOCK);
487d2a3a
RA		 986 if (!nest) {
987 kfree_skb(args);
988 return -EMSGSIZE;
989 }
990
991 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
992 kfree_skb(args);
993 return -EMSGSIZE;
994 }
995
996 nla_nest_end(args, nest);
997 genlmsg_end(args, hdr);
998
999 dump.dumpit = tipc_nl_publ_dump;
1000 dump.format = __tipc_nl_compat_publ_dump;
1001
1002 err = __tipc_nl_compat_dumpit(&dump, msg, args);
1003
1004 kfree_skb(args);
1005
1006 return err;
1007}
1008
1009static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
1010 struct nlattr **attrs)
1011{
1012 int err;
1013 u32 sock_ref;
1014 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
1015
297f7d2c
BD		 1016 if (!attrs[TIPC_NLA_SOCK])
1017 return -EINVAL;
1018
8cb08174
JB		 1019 err = nla_parse_nested_deprecated(sock, TIPC_NLA_SOCK_MAX,
1020 attrs[TIPC_NLA_SOCK], NULL, NULL);
297f7d2c
BD		 1021 if (err)
1022 return err;
487d2a3a
RA		 1023
1024 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
1025 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
1026
1027 if (sock[TIPC_NLA_SOCK_CON]) {
1028 u32 node;
1029 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
1030
8cb08174
JB		 1031 err = nla_parse_nested_deprecated(con, TIPC_NLA_CON_MAX,
1032 sock[TIPC_NLA_SOCK_CON],
1033 NULL, NULL);
89dfd008
AP		 1034
1035 if (err)
1036 return err;
487d2a3a
RA		 1037
1038 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
1039 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>",
1040 tipc_zone(node),
1041 tipc_cluster(node),
1042 tipc_node(node),
1043 nla_get_u32(con[TIPC_NLA_CON_SOCK]));
1044
1045 if (con[TIPC_NLA_CON_FLAG])
1046 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
1047 nla_get_u32(con[TIPC_NLA_CON_TYPE]),
1048 nla_get_u32(con[TIPC_NLA_CON_INST]));
1049 else
1050 tipc_tlv_sprintf(msg->rep, "\n");
1051 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
1052 tipc_tlv_sprintf(msg->rep, " bound to");
1053
1054 err = tipc_nl_compat_publ_dump(msg, sock_ref);
1055 if (err)
1056 return err;
1057 }
1058 tipc_tlv_sprintf(msg->rep, "\n");
1059
1060 return 0;
1061}
1062
5bfc335a
RA		 1063static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
1064 struct nlattr **attrs)
1065{
1066 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
297f7d2c
BD		 1067 int err;
1068
1069 if (!attrs[TIPC_NLA_MEDIA])
1070 return -EINVAL;
5bfc335a 1071
8cb08174
JB		 1072 err = nla_parse_nested_deprecated(media, TIPC_NLA_MEDIA_MAX,
1073 attrs[TIPC_NLA_MEDIA], NULL, NULL);
297f7d2c
BD		 1074 if (err)
1075 return err;
5bfc335a
RA		 1076
1077 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
1078 nla_data(media[TIPC_NLA_MEDIA_NAME]),
1079 nla_len(media[TIPC_NLA_MEDIA_NAME]));
1080}
1081
4b28cb58
RA		 1082static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
1083 struct nlattr **attrs)
1084{
1085 struct tipc_node_info node_info;
1086 struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
297f7d2c 1087 int err;
4b28cb58 1088
297f7d2c
BD		 1089 if (!attrs[TIPC_NLA_NODE])
1090 return -EINVAL;
1091
8cb08174
JB		 1092 err = nla_parse_nested_deprecated(node, TIPC_NLA_NODE_MAX,
1093 attrs[TIPC_NLA_NODE], NULL, NULL);
297f7d2c
BD		 1094 if (err)
1095 return err;
4b28cb58
RA		 1096
1097 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1098 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1099
1100 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1101 sizeof(node_info));
1102}
1103
c3d6fb85
RA		 1104static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1105 struct sk_buff *skb,
d7cc75d3
RA		 1106 struct tipc_nl_compat_msg *msg)
1107{
1108 u32 val;
1109 struct nlattr *net;
1110
1111 val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1112
ae0be8de 1113 net = nla_nest_start_noflag(skb, TIPC_NLA_NET);
d7cc75d3
RA		 1114 if (!net)
1115 return -EMSGSIZE;
1116
964f9501
RA		 1117 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1118 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1119 return -EMSGSIZE;
1120 } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1121 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1122 return -EMSGSIZE;
1123 }
d7cc75d3
RA		 1124 nla_nest_end(skb, net);
1125
1126 return 0;
1127}
1128
3c26181c
RA		 1129static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1130 struct nlattr **attrs)
1131{
1132 __be32 id;
1133 struct nlattr *net[TIPC_NLA_NET_MAX + 1];
297f7d2c
BD		 1134 int err;
1135
1136 if (!attrs[TIPC_NLA_NET])
1137 return -EINVAL;
1138
8cb08174
JB		 1139 err = nla_parse_nested_deprecated(net, TIPC_NLA_NET_MAX,
1140 attrs[TIPC_NLA_NET], NULL, NULL);
297f7d2c
BD		 1141 if (err)
1142 return err;
3c26181c 1143
3c26181c
RA		 1144 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1145
1146 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1147}
1148
5a81a637
RA		 1149static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1150{
1151 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1152 if (!msg->rep)
1153 return -ENOMEM;
1154
1155 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1156 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1157
1158 return 0;
1159}
1160
d0796d1e
RA		 1161static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1162{
1163 struct tipc_nl_compat_cmd_dump dump;
9ab15465 1164 struct tipc_nl_compat_cmd_doit doit;
d0796d1e
RA		 1165
1166 memset(&dump, 0, sizeof(dump));
9ab15465 1167 memset(&doit, 0, sizeof(doit));
d0796d1e
RA		 1168
1169 switch (msg->cmd) {
22ae7cff
RA		 1170 case TIPC_CMD_NOOP:
1171 msg->rep = tipc_tlv_alloc(0);
1172 if (!msg->rep)
1173 return -ENOMEM;
1174 return 0;
d0796d1e
RA		 1175 case TIPC_CMD_GET_BEARER_NAMES:
1176 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1177 dump.dumpit = tipc_nl_bearer_dump;
1178 dump.format = tipc_nl_compat_bearer_dump;
1179 return tipc_nl_compat_dumpit(&dump, msg);
9ab15465
RA		 1180 case TIPC_CMD_ENABLE_BEARER:
1181 msg->req_type = TIPC_TLV_BEARER_CONFIG;
ed4ffdfe 1182 doit.doit = __tipc_nl_bearer_enable;
9ab15465
RA		 1183 doit.transcode = tipc_nl_compat_bearer_enable;
1184 return tipc_nl_compat_doit(&doit, msg);
1185 case TIPC_CMD_DISABLE_BEARER:
1186 msg->req_type = TIPC_TLV_BEARER_NAME;
ed4ffdfe 1187 doit.doit = __tipc_nl_bearer_disable;
9ab15465
RA		 1188 doit.transcode = tipc_nl_compat_bearer_disable;
1189 return tipc_nl_compat_doit(&doit, msg);
f2b3b2d4
RA		 1190 case TIPC_CMD_SHOW_LINK_STATS:
1191 msg->req_type = TIPC_TLV_LINK_NAME;
1192 msg->rep_size = ULTRA_STRING_MAX_LEN;
1193 msg->rep_type = TIPC_TLV_ULTRA_STRING;
38206d59 1194 dump.dumpit = tipc_nl_node_dump_link;
f2b3b2d4
RA		 1195 dump.format = tipc_nl_compat_link_stat_dump;
1196 return tipc_nl_compat_dumpit(&dump, msg);
357ebdbf
RA		 1197 case TIPC_CMD_GET_LINKS:
1198 msg->req_type = TIPC_TLV_NET_ADDR;
1199 msg->rep_size = ULTRA_STRING_MAX_LEN;
38206d59 1200 dump.dumpit = tipc_nl_node_dump_link;
357ebdbf
RA		 1201 dump.format = tipc_nl_compat_link_dump;
1202 return tipc_nl_compat_dumpit(&dump, msg);
37e2d484
RA		 1203 case TIPC_CMD_SET_LINK_TOL:
1204 case TIPC_CMD_SET_LINK_PRI:
1205 case TIPC_CMD_SET_LINK_WINDOW:
1206 msg->req_type = TIPC_TLV_LINK_CONFIG;
5be9c086 1207 doit.doit = tipc_nl_node_set_link;
37e2d484
RA		 1208 doit.transcode = tipc_nl_compat_link_set;
1209 return tipc_nl_compat_doit(&doit, msg);
1817877b
RA		 1210 case TIPC_CMD_RESET_LINK_STATS:
1211 msg->req_type = TIPC_TLV_LINK_NAME;
5be9c086 1212 doit.doit = tipc_nl_node_reset_link_stats;
1817877b
RA		 1213 doit.transcode = tipc_nl_compat_link_reset_stats;
1214 return tipc_nl_compat_doit(&doit, msg);
44a8ae94
RA		 1215 case TIPC_CMD_SHOW_NAME_TABLE:
1216 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1217 msg->rep_size = ULTRA_STRING_MAX_LEN;
1218 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1219 dump.header = tipc_nl_compat_name_table_dump_header;
1220 dump.dumpit = tipc_nl_name_table_dump;
1221 dump.format = tipc_nl_compat_name_table_dump;
1222 return tipc_nl_compat_dumpit(&dump, msg);
487d2a3a
RA		 1223 case TIPC_CMD_SHOW_PORTS:
1224 msg->rep_size = ULTRA_STRING_MAX_LEN;
1225 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1226 dump.dumpit = tipc_nl_sk_dump;
1227 dump.format = tipc_nl_compat_sk_dump;
1228 return tipc_nl_compat_dumpit(&dump, msg);
5bfc335a
RA		 1229 case TIPC_CMD_GET_MEDIA_NAMES:
1230 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1231 dump.dumpit = tipc_nl_media_dump;
1232 dump.format = tipc_nl_compat_media_dump;
1233 return tipc_nl_compat_dumpit(&dump, msg);
4b28cb58
RA		 1234 case TIPC_CMD_GET_NODES:
1235 msg->rep_size = ULTRA_STRING_MAX_LEN;
1236 dump.dumpit = tipc_nl_node_dump;
1237 dump.format = tipc_nl_compat_node_dump;
1238 return tipc_nl_compat_dumpit(&dump, msg);
d7cc75d3
RA		 1239 case TIPC_CMD_SET_NODE_ADDR:
1240 msg->req_type = TIPC_TLV_NET_ADDR;
ed4ffdfe 1241 doit.doit = __tipc_nl_net_set;
d7cc75d3
RA		 1242 doit.transcode = tipc_nl_compat_net_set;
1243 return tipc_nl_compat_doit(&doit, msg);
964f9501
RA		 1244 case TIPC_CMD_SET_NETID:
1245 msg->req_type = TIPC_TLV_UNSIGNED;
ed4ffdfe 1246 doit.doit = __tipc_nl_net_set;
964f9501
RA		 1247 doit.transcode = tipc_nl_compat_net_set;
1248 return tipc_nl_compat_doit(&doit, msg);
3c26181c
RA		 1249 case TIPC_CMD_GET_NETID:
1250 msg->rep_size = sizeof(u32);
1251 dump.dumpit = tipc_nl_net_dump;
1252 dump.format = tipc_nl_compat_net_dump;
1253 return tipc_nl_compat_dumpit(&dump, msg);
5a81a637
RA		 1254 case TIPC_CMD_SHOW_STATS:
1255 return tipc_cmd_show_stats_compat(msg);
d0796d1e
RA		 1256 }
1257
1258 return -EOPNOTSUPP;
1259}
1260
1261static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1262{
1263 int err;
1264 int len;
1265 struct tipc_nl_compat_msg msg;
1266 struct nlmsghdr *req_nlh;
1267 struct nlmsghdr *rep_nlh;
1268 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
d0796d1e
RA		 1269
1270 memset(&msg, 0, sizeof(msg));
1271
1272 req_nlh = (struct nlmsghdr *)skb->data;
1273 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1274 msg.cmd = req_userhdr->cmd;
c3d6fb85 1275 msg.net = genl_info_net(info);
619b1745 1276 msg.dst_sk = skb->sk;
d0796d1e
RA		 1277
1278 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1279 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1280 err = -EACCES;
1281 goto send;
1282 }
1283
4da5f001
TK		 1284 msg.req_size = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1285 if (msg.req_size && !TLV_OK(msg.req, msg.req_size)) {
d0796d1e
RA		 1286 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1287 err = -EOPNOTSUPP;
1288 goto send;
1289 }
1290
1291 err = tipc_nl_compat_handle(&msg);
b063bc5e 1292 if ((err == -EOPNOTSUPP) || (err == -EPERM))
d0796d1e
RA		 1293 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1294 else if (err == -EINVAL)
1295 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1296send:
1297 if (!msg.rep)
1298 return err;
1299
1300 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1301 skb_push(msg.rep, len);
1302 rep_nlh = nlmsg_hdr(msg.rep);
1303 memcpy(rep_nlh, info->nlhdr, len);
1304 rep_nlh->nlmsg_len = msg.rep->len;
c3d6fb85 1305 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
d0796d1e
RA		 1306
1307 return err;
1308}
1309
042a9010 1310static const struct genl_ops tipc_genl_compat_ops[] = {
489111e5
JB		 1311 {
1312 .cmd = TIPC_GENL_CMD,
ef6243ac 1313 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
489111e5
JB		 1314 .doit = tipc_nl_compat_recv,
1315 },
1316};
1317
56989f6d 1318static struct genl_family tipc_genl_compat_family __ro_after_init = {
bfb3e5dd
RA		 1319 .name = TIPC_GENL_NAME,
1320 .version = TIPC_GENL_VERSION,
1321 .hdrsize = TIPC_GENL_HDRLEN,
1322 .maxattr = 0,
1323 .netnsok = true,
489111e5
JB		 1324 .module = THIS_MODULE,
1325 .ops = tipc_genl_compat_ops,
1326 .n_ops = ARRAY_SIZE(tipc_genl_compat_ops),
bfb3e5dd
RA		 1327};
1328
56989f6d 1329int __init tipc_netlink_compat_start(void)
bfb3e5dd
RA		 1330{
1331 int res;
1332
489111e5 1333 res = genl_register_family(&tipc_genl_compat_family);
bfb3e5dd
RA		 1334 if (res) {
1335 pr_err("Failed to register legacy compat interface\n");
1336 return res;
1337 }
1338
1339 return 0;
1340}
1341
1342void tipc_netlink_compat_stop(void)
1343{
1344 genl_unregister_family(&tipc_genl_compat_family);
1345}
Linux 6.x block layer and io_uring tree(s)