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Merge branch 'for-4.3/upstream' into for-4.3/wacom
[mirror_ubuntu-artful-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 sk_buff *rep;
59 struct tlv_desc *req;
60 struct sock *dst_sk;
61 };
62
63 struct tipc_nl_compat_cmd_dump {
64 int (*header)(struct tipc_nl_compat_msg *);
65 int (*dumpit)(struct sk_buff *, struct netlink_callback *);
66 int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
67 };
68
69 struct tipc_nl_compat_cmd_doit {
70 int (*doit)(struct sk_buff *skb, struct genl_info *info);
71 int (*transcode)(struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
72 };
73
74 static int tipc_skb_tailroom(struct sk_buff *skb)
75 {
76 int tailroom;
77 int limit;
78
79 tailroom = skb_tailroom(skb);
80 limit = TIPC_SKB_MAX - skb->len;
81
82 if (tailroom < limit)
83 return tailroom;
84
85 return limit;
86 }
87
88 static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len)
89 {
90 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb);
91
92 if (tipc_skb_tailroom(skb) < TLV_SPACE(len))
93 return -EMSGSIZE;
94
95 skb_put(skb, TLV_SPACE(len));
96 tlv->tlv_type = htons(type);
97 tlv->tlv_len = htons(TLV_LENGTH(len));
98 if (len && data)
99 memcpy(TLV_DATA(tlv), data, len);
100
101 return 0;
102 }
103
104 static void tipc_tlv_init(struct sk_buff *skb, u16 type)
105 {
106 struct tlv_desc *tlv = (struct tlv_desc *)skb->data;
107
108 TLV_SET_LEN(tlv, 0);
109 TLV_SET_TYPE(tlv, type);
110 skb_put(skb, sizeof(struct tlv_desc));
111 }
112
113 static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...)
114 {
115 int n;
116 u16 len;
117 u32 rem;
118 char *buf;
119 struct tlv_desc *tlv;
120 va_list args;
121
122 rem = tipc_skb_tailroom(skb);
123
124 tlv = (struct tlv_desc *)skb->data;
125 len = TLV_GET_LEN(tlv);
126 buf = TLV_DATA(tlv) + len;
127
128 va_start(args, fmt);
129 n = vscnprintf(buf, rem, fmt, args);
130 va_end(args);
131
132 TLV_SET_LEN(tlv, n + len);
133 skb_put(skb, n);
134
135 return n;
136 }
137
138 static struct sk_buff *tipc_tlv_alloc(int size)
139 {
140 int hdr_len;
141 struct sk_buff *buf;
142
143 size = TLV_SPACE(size);
144 hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
145
146 buf = alloc_skb(hdr_len + size, GFP_KERNEL);
147 if (!buf)
148 return NULL;
149
150 skb_reserve(buf, hdr_len);
151
152 return buf;
153 }
154
155 static struct sk_buff *tipc_get_err_tlv(char *str)
156 {
157 int str_len = strlen(str) + 1;
158 struct sk_buff *buf;
159
160 buf = tipc_tlv_alloc(TLV_SPACE(str_len));
161 if (buf)
162 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
163
164 return buf;
165 }
166
167 static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
168 struct tipc_nl_compat_msg *msg,
169 struct sk_buff *arg)
170 {
171 int len = 0;
172 int err;
173 struct sk_buff *buf;
174 struct nlmsghdr *nlmsg;
175 struct netlink_callback cb;
176
177 memset(&cb, 0, sizeof(cb));
178 cb.nlh = (struct nlmsghdr *)arg->data;
179 cb.skb = arg;
180
181 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
182 if (!buf)
183 return -ENOMEM;
184
185 buf->sk = msg->dst_sk;
186
187 do {
188 int rem;
189
190 len = (*cmd->dumpit)(buf, &cb);
191
192 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
193 struct nlattr **attrs;
194
195 err = tipc_nlmsg_parse(nlmsg, &attrs);
196 if (err)
197 goto err_out;
198
199 err = (*cmd->format)(msg, attrs);
200 if (err)
201 goto err_out;
202
203 if (tipc_skb_tailroom(msg->rep) <= 1) {
204 err = -EMSGSIZE;
205 goto err_out;
206 }
207 }
208
209 skb_reset_tail_pointer(buf);
210 buf->len = 0;
211
212 } while (len);
213
214 err = 0;
215
216 err_out:
217 kfree_skb(buf);
218
219 if (err == -EMSGSIZE) {
220 /* The legacy API only considered messages filling
221 * "ULTRA_STRING_MAX_LEN" to be truncated.
222 */
223 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
224 char *tail = skb_tail_pointer(msg->rep);
225
226 if (*tail != '\0')
227 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
228 REPLY_TRUNCATED);
229 }
230
231 return 0;
232 }
233
234 return err;
235 }
236
237 static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
238 struct tipc_nl_compat_msg *msg)
239 {
240 int err;
241 struct sk_buff *arg;
242
243 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
244 return -EINVAL;
245
246 msg->rep = tipc_tlv_alloc(msg->rep_size);
247 if (!msg->rep)
248 return -ENOMEM;
249
250 if (msg->rep_type)
251 tipc_tlv_init(msg->rep, msg->rep_type);
252
253 if (cmd->header)
254 (*cmd->header)(msg);
255
256 arg = nlmsg_new(0, GFP_KERNEL);
257 if (!arg) {
258 kfree_skb(msg->rep);
259 return -ENOMEM;
260 }
261
262 err = __tipc_nl_compat_dumpit(cmd, msg, arg);
263 if (err)
264 kfree_skb(msg->rep);
265
266 kfree_skb(arg);
267
268 return err;
269 }
270
271 static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
272 struct tipc_nl_compat_msg *msg)
273 {
274 int err;
275 struct sk_buff *doit_buf;
276 struct sk_buff *trans_buf;
277 struct nlattr **attrbuf;
278 struct genl_info info;
279
280 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
281 if (!trans_buf)
282 return -ENOMEM;
283
284 err = (*cmd->transcode)(trans_buf, msg);
285 if (err)
286 goto trans_out;
287
288 attrbuf = kmalloc((tipc_genl_family.maxattr + 1) *
289 sizeof(struct nlattr *), GFP_KERNEL);
290 if (!attrbuf) {
291 err = -ENOMEM;
292 goto trans_out;
293 }
294
295 err = nla_parse(attrbuf, tipc_genl_family.maxattr,
296 (const struct nlattr *)trans_buf->data,
297 trans_buf->len, NULL);
298 if (err)
299 goto parse_out;
300
301 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
302 if (!doit_buf) {
303 err = -ENOMEM;
304 goto parse_out;
305 }
306
307 doit_buf->sk = msg->dst_sk;
308
309 memset(&info, 0, sizeof(info));
310 info.attrs = attrbuf;
311
312 err = (*cmd->doit)(doit_buf, &info);
313
314 kfree_skb(doit_buf);
315 parse_out:
316 kfree(attrbuf);
317 trans_out:
318 kfree_skb(trans_buf);
319
320 return err;
321 }
322
323 static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
324 struct tipc_nl_compat_msg *msg)
325 {
326 int err;
327
328 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
329 return -EINVAL;
330
331 err = __tipc_nl_compat_doit(cmd, msg);
332 if (err)
333 return err;
334
335 /* The legacy API considered an empty message a success message */
336 msg->rep = tipc_tlv_alloc(0);
337 if (!msg->rep)
338 return -ENOMEM;
339
340 return 0;
341 }
342
343 static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
344 struct nlattr **attrs)
345 {
346 struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
347
348 nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, attrs[TIPC_NLA_BEARER],
349 NULL);
350
351 return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
352 nla_data(bearer[TIPC_NLA_BEARER_NAME]),
353 nla_len(bearer[TIPC_NLA_BEARER_NAME]));
354 }
355
356 static int tipc_nl_compat_bearer_enable(struct sk_buff *skb,
357 struct tipc_nl_compat_msg *msg)
358 {
359 struct nlattr *prop;
360 struct nlattr *bearer;
361 struct tipc_bearer_config *b;
362
363 b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
364
365 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
366 if (!bearer)
367 return -EMSGSIZE;
368
369 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
370 return -EMSGSIZE;
371
372 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
373 return -EMSGSIZE;
374
375 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
376 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
377 if (!prop)
378 return -EMSGSIZE;
379 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
380 return -EMSGSIZE;
381 nla_nest_end(skb, prop);
382 }
383 nla_nest_end(skb, bearer);
384
385 return 0;
386 }
387
388 static int tipc_nl_compat_bearer_disable(struct sk_buff *skb,
389 struct tipc_nl_compat_msg *msg)
390 {
391 char *name;
392 struct nlattr *bearer;
393
394 name = (char *)TLV_DATA(msg->req);
395
396 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
397 if (!bearer)
398 return -EMSGSIZE;
399
400 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
401 return -EMSGSIZE;
402
403 nla_nest_end(skb, bearer);
404
405 return 0;
406 }
407
408 static inline u32 perc(u32 count, u32 total)
409 {
410 return (count * 100 + (total / 2)) / total;
411 }
412
413 static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
414 struct nlattr *prop[], struct nlattr *stats[])
415 {
416 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
417 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
418
419 tipc_tlv_sprintf(msg->rep,
420 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
421 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
422 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
423 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
424 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
425 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
426
427 tipc_tlv_sprintf(msg->rep,
428 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
429 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
430 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
431 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
432 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
433 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
434
435 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
436 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
437 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
438 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
439
440 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
441 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
442 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
443 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
444
445 tipc_tlv_sprintf(msg->rep,
446 " Congestion link:%u Send queue max:%u avg:%u",
447 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
448 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
449 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
450 }
451
452 static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
453 struct nlattr **attrs)
454 {
455 char *name;
456 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
457 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
458 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
459
460 nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
461
462 nla_parse_nested(prop, TIPC_NLA_PROP_MAX, link[TIPC_NLA_LINK_PROP],
463 NULL);
464
465 nla_parse_nested(stats, TIPC_NLA_STATS_MAX, link[TIPC_NLA_LINK_STATS],
466 NULL);
467
468 name = (char *)TLV_DATA(msg->req);
469 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
470 return 0;
471
472 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
473 nla_data(link[TIPC_NLA_LINK_NAME]));
474
475 if (link[TIPC_NLA_LINK_BROADCAST]) {
476 __fill_bc_link_stat(msg, prop, stats);
477 return 0;
478 }
479
480 if (link[TIPC_NLA_LINK_ACTIVE])
481 tipc_tlv_sprintf(msg->rep, " ACTIVE");
482 else if (link[TIPC_NLA_LINK_UP])
483 tipc_tlv_sprintf(msg->rep, " STANDBY");
484 else
485 tipc_tlv_sprintf(msg->rep, " DEFUNCT");
486
487 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
488 nla_get_u32(link[TIPC_NLA_LINK_MTU]),
489 nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
490
491 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
492 nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
493 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
494
495 tipc_tlv_sprintf(msg->rep,
496 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
497 nla_get_u32(link[TIPC_NLA_LINK_RX]) -
498 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
499 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
500 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
501 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
502 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
503
504 tipc_tlv_sprintf(msg->rep,
505 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
506 nla_get_u32(link[TIPC_NLA_LINK_TX]) -
507 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
508 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
509 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
510 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
511 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
512
513 tipc_tlv_sprintf(msg->rep,
514 " TX profile sample:%u packets average:%u octets\n",
515 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
516 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
517 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
518
519 tipc_tlv_sprintf(msg->rep,
520 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
521 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
522 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
523 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
524 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
525 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
526 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
527 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
528 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
529
530 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
531 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
532 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
533 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
534 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
535 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
536 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
537
538 tipc_tlv_sprintf(msg->rep,
539 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
540 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
541 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
542 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
543 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
544 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
545
546 tipc_tlv_sprintf(msg->rep,
547 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
548 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
549 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
550 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
551 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
552 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
553
554 tipc_tlv_sprintf(msg->rep,
555 " Congestion link:%u Send queue max:%u avg:%u",
556 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
557 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
558 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
559
560 return 0;
561 }
562
563 static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
564 struct nlattr **attrs)
565 {
566 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
567 struct tipc_link_info link_info;
568
569 nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
570
571 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
572 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
573 strcpy(link_info.str, nla_data(link[TIPC_NLA_LINK_NAME]));
574
575 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
576 &link_info, sizeof(link_info));
577 }
578
579 static int tipc_nl_compat_link_set(struct sk_buff *skb,
580 struct tipc_nl_compat_msg *msg)
581 {
582 struct nlattr *link;
583 struct nlattr *prop;
584 struct tipc_link_config *lc;
585
586 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
587
588 link = nla_nest_start(skb, TIPC_NLA_LINK);
589 if (!link)
590 return -EMSGSIZE;
591
592 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
593 return -EMSGSIZE;
594
595 prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP);
596 if (!prop)
597 return -EMSGSIZE;
598
599 if (msg->cmd == TIPC_CMD_SET_LINK_PRI) {
600 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)))
601 return -EMSGSIZE;
602 } else if (msg->cmd == TIPC_CMD_SET_LINK_TOL) {
603 if (nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)))
604 return -EMSGSIZE;
605 } else if (msg->cmd == TIPC_CMD_SET_LINK_WINDOW) {
606 if (nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)))
607 return -EMSGSIZE;
608 }
609
610 nla_nest_end(skb, prop);
611 nla_nest_end(skb, link);
612
613 return 0;
614 }
615
616 static int tipc_nl_compat_link_reset_stats(struct sk_buff *skb,
617 struct tipc_nl_compat_msg *msg)
618 {
619 char *name;
620 struct nlattr *link;
621
622 name = (char *)TLV_DATA(msg->req);
623
624 link = nla_nest_start(skb, TIPC_NLA_LINK);
625 if (!link)
626 return -EMSGSIZE;
627
628 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
629 return -EMSGSIZE;
630
631 nla_nest_end(skb, link);
632
633 return 0;
634 }
635
636 static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
637 {
638 int i;
639 u32 depth;
640 struct tipc_name_table_query *ntq;
641 static const char * const header[] = {
642 "Type ",
643 "Lower Upper ",
644 "Port Identity ",
645 "Publication Scope"
646 };
647
648 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
649
650 depth = ntohl(ntq->depth);
651
652 if (depth > 4)
653 depth = 4;
654 for (i = 0; i < depth; i++)
655 tipc_tlv_sprintf(msg->rep, header[i]);
656 tipc_tlv_sprintf(msg->rep, "\n");
657
658 return 0;
659 }
660
661 static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
662 struct nlattr **attrs)
663 {
664 char port_str[27];
665 struct tipc_name_table_query *ntq;
666 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
667 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
668 u32 node, depth, type, lowbound, upbound;
669 static const char * const scope_str[] = {"", " zone", " cluster",
670 " node"};
671
672 nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX,
673 attrs[TIPC_NLA_NAME_TABLE], NULL);
674
675 nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, nt[TIPC_NLA_NAME_TABLE_PUBL],
676 NULL);
677
678 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
679
680 depth = ntohl(ntq->depth);
681 type = ntohl(ntq->type);
682 lowbound = ntohl(ntq->lowbound);
683 upbound = ntohl(ntq->upbound);
684
685 if (!(depth & TIPC_NTQ_ALLTYPES) &&
686 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
687 return 0;
688 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
689 return 0;
690 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
691 return 0;
692
693 tipc_tlv_sprintf(msg->rep, "%-10u ",
694 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
695
696 if (depth == 1)
697 goto out;
698
699 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
700 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
701 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
702
703 if (depth == 2)
704 goto out;
705
706 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
707 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
708 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
709 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
710
711 if (depth == 3)
712 goto out;
713
714 tipc_tlv_sprintf(msg->rep, "%-10u %s",
715 nla_get_u32(publ[TIPC_NLA_PUBL_REF]),
716 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
717 out:
718 tipc_tlv_sprintf(msg->rep, "\n");
719
720 return 0;
721 }
722
723 static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
724 struct nlattr **attrs)
725 {
726 u32 type, lower, upper;
727 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
728
729 nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL], NULL);
730
731 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
732 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
733 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
734
735 if (lower == upper)
736 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
737 else
738 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
739
740 return 0;
741 }
742
743 static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
744 {
745 int err;
746 void *hdr;
747 struct nlattr *nest;
748 struct sk_buff *args;
749 struct tipc_nl_compat_cmd_dump dump;
750
751 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
752 if (!args)
753 return -ENOMEM;
754
755 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
756 TIPC_NL_PUBL_GET);
757
758 nest = nla_nest_start(args, TIPC_NLA_SOCK);
759 if (!nest) {
760 kfree_skb(args);
761 return -EMSGSIZE;
762 }
763
764 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
765 kfree_skb(args);
766 return -EMSGSIZE;
767 }
768
769 nla_nest_end(args, nest);
770 genlmsg_end(args, hdr);
771
772 dump.dumpit = tipc_nl_publ_dump;
773 dump.format = __tipc_nl_compat_publ_dump;
774
775 err = __tipc_nl_compat_dumpit(&dump, msg, args);
776
777 kfree_skb(args);
778
779 return err;
780 }
781
782 static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
783 struct nlattr **attrs)
784 {
785 int err;
786 u32 sock_ref;
787 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
788
789 nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK], NULL);
790
791 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
792 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
793
794 if (sock[TIPC_NLA_SOCK_CON]) {
795 u32 node;
796 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
797
798 nla_parse_nested(con, TIPC_NLA_CON_MAX, sock[TIPC_NLA_SOCK_CON],
799 NULL);
800
801 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
802 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>",
803 tipc_zone(node),
804 tipc_cluster(node),
805 tipc_node(node),
806 nla_get_u32(con[TIPC_NLA_CON_SOCK]));
807
808 if (con[TIPC_NLA_CON_FLAG])
809 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
810 nla_get_u32(con[TIPC_NLA_CON_TYPE]),
811 nla_get_u32(con[TIPC_NLA_CON_INST]));
812 else
813 tipc_tlv_sprintf(msg->rep, "\n");
814 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
815 tipc_tlv_sprintf(msg->rep, " bound to");
816
817 err = tipc_nl_compat_publ_dump(msg, sock_ref);
818 if (err)
819 return err;
820 }
821 tipc_tlv_sprintf(msg->rep, "\n");
822
823 return 0;
824 }
825
826 static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
827 struct nlattr **attrs)
828 {
829 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
830
831 nla_parse_nested(media, TIPC_NLA_MEDIA_MAX, attrs[TIPC_NLA_MEDIA],
832 NULL);
833
834 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
835 nla_data(media[TIPC_NLA_MEDIA_NAME]),
836 nla_len(media[TIPC_NLA_MEDIA_NAME]));
837 }
838
839 static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
840 struct nlattr **attrs)
841 {
842 struct tipc_node_info node_info;
843 struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
844
845 nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE], NULL);
846
847 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
848 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
849
850 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
851 sizeof(node_info));
852 }
853
854 static int tipc_nl_compat_net_set(struct sk_buff *skb,
855 struct tipc_nl_compat_msg *msg)
856 {
857 u32 val;
858 struct nlattr *net;
859
860 val = ntohl(*(__be32 *)TLV_DATA(msg->req));
861
862 net = nla_nest_start(skb, TIPC_NLA_NET);
863 if (!net)
864 return -EMSGSIZE;
865
866 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
867 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
868 return -EMSGSIZE;
869 } else if (msg->cmd == TIPC_CMD_SET_NETID) {
870 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
871 return -EMSGSIZE;
872 }
873 nla_nest_end(skb, net);
874
875 return 0;
876 }
877
878 static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
879 struct nlattr **attrs)
880 {
881 __be32 id;
882 struct nlattr *net[TIPC_NLA_NET_MAX + 1];
883
884 nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET], NULL);
885 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
886
887 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
888 }
889
890 static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
891 {
892 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
893 if (!msg->rep)
894 return -ENOMEM;
895
896 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
897 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
898
899 return 0;
900 }
901
902 static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
903 {
904 struct tipc_nl_compat_cmd_dump dump;
905 struct tipc_nl_compat_cmd_doit doit;
906
907 memset(&dump, 0, sizeof(dump));
908 memset(&doit, 0, sizeof(doit));
909
910 switch (msg->cmd) {
911 case TIPC_CMD_NOOP:
912 msg->rep = tipc_tlv_alloc(0);
913 if (!msg->rep)
914 return -ENOMEM;
915 return 0;
916 case TIPC_CMD_GET_BEARER_NAMES:
917 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
918 dump.dumpit = tipc_nl_bearer_dump;
919 dump.format = tipc_nl_compat_bearer_dump;
920 return tipc_nl_compat_dumpit(&dump, msg);
921 case TIPC_CMD_ENABLE_BEARER:
922 msg->req_type = TIPC_TLV_BEARER_CONFIG;
923 doit.doit = tipc_nl_bearer_enable;
924 doit.transcode = tipc_nl_compat_bearer_enable;
925 return tipc_nl_compat_doit(&doit, msg);
926 case TIPC_CMD_DISABLE_BEARER:
927 msg->req_type = TIPC_TLV_BEARER_NAME;
928 doit.doit = tipc_nl_bearer_disable;
929 doit.transcode = tipc_nl_compat_bearer_disable;
930 return tipc_nl_compat_doit(&doit, msg);
931 case TIPC_CMD_SHOW_LINK_STATS:
932 msg->req_type = TIPC_TLV_LINK_NAME;
933 msg->rep_size = ULTRA_STRING_MAX_LEN;
934 msg->rep_type = TIPC_TLV_ULTRA_STRING;
935 dump.dumpit = tipc_nl_link_dump;
936 dump.format = tipc_nl_compat_link_stat_dump;
937 return tipc_nl_compat_dumpit(&dump, msg);
938 case TIPC_CMD_GET_LINKS:
939 msg->req_type = TIPC_TLV_NET_ADDR;
940 msg->rep_size = ULTRA_STRING_MAX_LEN;
941 dump.dumpit = tipc_nl_link_dump;
942 dump.format = tipc_nl_compat_link_dump;
943 return tipc_nl_compat_dumpit(&dump, msg);
944 case TIPC_CMD_SET_LINK_TOL:
945 case TIPC_CMD_SET_LINK_PRI:
946 case TIPC_CMD_SET_LINK_WINDOW:
947 msg->req_type = TIPC_TLV_LINK_CONFIG;
948 doit.doit = tipc_nl_link_set;
949 doit.transcode = tipc_nl_compat_link_set;
950 return tipc_nl_compat_doit(&doit, msg);
951 case TIPC_CMD_RESET_LINK_STATS:
952 msg->req_type = TIPC_TLV_LINK_NAME;
953 doit.doit = tipc_nl_link_reset_stats;
954 doit.transcode = tipc_nl_compat_link_reset_stats;
955 return tipc_nl_compat_doit(&doit, msg);
956 case TIPC_CMD_SHOW_NAME_TABLE:
957 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
958 msg->rep_size = ULTRA_STRING_MAX_LEN;
959 msg->rep_type = TIPC_TLV_ULTRA_STRING;
960 dump.header = tipc_nl_compat_name_table_dump_header;
961 dump.dumpit = tipc_nl_name_table_dump;
962 dump.format = tipc_nl_compat_name_table_dump;
963 return tipc_nl_compat_dumpit(&dump, msg);
964 case TIPC_CMD_SHOW_PORTS:
965 msg->rep_size = ULTRA_STRING_MAX_LEN;
966 msg->rep_type = TIPC_TLV_ULTRA_STRING;
967 dump.dumpit = tipc_nl_sk_dump;
968 dump.format = tipc_nl_compat_sk_dump;
969 return tipc_nl_compat_dumpit(&dump, msg);
970 case TIPC_CMD_GET_MEDIA_NAMES:
971 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
972 dump.dumpit = tipc_nl_media_dump;
973 dump.format = tipc_nl_compat_media_dump;
974 return tipc_nl_compat_dumpit(&dump, msg);
975 case TIPC_CMD_GET_NODES:
976 msg->rep_size = ULTRA_STRING_MAX_LEN;
977 dump.dumpit = tipc_nl_node_dump;
978 dump.format = tipc_nl_compat_node_dump;
979 return tipc_nl_compat_dumpit(&dump, msg);
980 case TIPC_CMD_SET_NODE_ADDR:
981 msg->req_type = TIPC_TLV_NET_ADDR;
982 doit.doit = tipc_nl_net_set;
983 doit.transcode = tipc_nl_compat_net_set;
984 return tipc_nl_compat_doit(&doit, msg);
985 case TIPC_CMD_SET_NETID:
986 msg->req_type = TIPC_TLV_UNSIGNED;
987 doit.doit = tipc_nl_net_set;
988 doit.transcode = tipc_nl_compat_net_set;
989 return tipc_nl_compat_doit(&doit, msg);
990 case TIPC_CMD_GET_NETID:
991 msg->rep_size = sizeof(u32);
992 dump.dumpit = tipc_nl_net_dump;
993 dump.format = tipc_nl_compat_net_dump;
994 return tipc_nl_compat_dumpit(&dump, msg);
995 case TIPC_CMD_SHOW_STATS:
996 return tipc_cmd_show_stats_compat(msg);
997 }
998
999 return -EOPNOTSUPP;
1000 }
1001
1002 static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1003 {
1004 int err;
1005 int len;
1006 struct tipc_nl_compat_msg msg;
1007 struct nlmsghdr *req_nlh;
1008 struct nlmsghdr *rep_nlh;
1009 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1010 struct net *net = genl_info_net(info);
1011
1012 memset(&msg, 0, sizeof(msg));
1013
1014 req_nlh = (struct nlmsghdr *)skb->data;
1015 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1016 msg.cmd = req_userhdr->cmd;
1017 msg.dst_sk = info->dst_sk;
1018
1019 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1020 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1021 err = -EACCES;
1022 goto send;
1023 }
1024
1025 len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1026 if (TLV_GET_LEN(msg.req) && !TLV_OK(msg.req, len)) {
1027 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1028 err = -EOPNOTSUPP;
1029 goto send;
1030 }
1031
1032 err = tipc_nl_compat_handle(&msg);
1033 if (err == -EOPNOTSUPP)
1034 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1035 else if (err == -EINVAL)
1036 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1037 send:
1038 if (!msg.rep)
1039 return err;
1040
1041 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1042 skb_push(msg.rep, len);
1043 rep_nlh = nlmsg_hdr(msg.rep);
1044 memcpy(rep_nlh, info->nlhdr, len);
1045 rep_nlh->nlmsg_len = msg.rep->len;
1046 genlmsg_unicast(net, msg.rep, NETLINK_CB(skb).portid);
1047
1048 return err;
1049 }
1050
1051 static struct genl_family tipc_genl_compat_family = {
1052 .id = GENL_ID_GENERATE,
1053 .name = TIPC_GENL_NAME,
1054 .version = TIPC_GENL_VERSION,
1055 .hdrsize = TIPC_GENL_HDRLEN,
1056 .maxattr = 0,
1057 .netnsok = true,
1058 };
1059
1060 static struct genl_ops tipc_genl_compat_ops[] = {
1061 {
1062 .cmd = TIPC_GENL_CMD,
1063 .doit = tipc_nl_compat_recv,
1064 },
1065 };
1066
1067 int tipc_netlink_compat_start(void)
1068 {
1069 int res;
1070
1071 res = genl_register_family_with_ops(&tipc_genl_compat_family,
1072 tipc_genl_compat_ops);
1073 if (res) {
1074 pr_err("Failed to register legacy compat interface\n");
1075 return res;
1076 }
1077
1078 return 0;
1079 }
1080
1081 void tipc_netlink_compat_stop(void)
1082 {
1083 genl_unregister_family(&tipc_genl_compat_family);
1084 }
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