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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
45
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;
55 int rep_type;
56 int rep_size;
57 int req_type;
58 struct net *net;
59 struct sk_buff *rep;
60 struct tlv_desc *req;
61 struct sock *dst_sk;
62};
63
64struct tipc_nl_compat_cmd_dump {
65 int (*header)(struct tipc_nl_compat_msg *);
66 int (*dumpit)(struct sk_buff *, struct netlink_callback *);
67 int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
68};
69
70struct tipc_nl_compat_cmd_doit {
71 int (*doit)(struct sk_buff *skb, struct genl_info *info);
72 int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd,
73 struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
74};
75
76static int tipc_skb_tailroom(struct sk_buff *skb)
77{
78 int tailroom;
79 int limit;
80
81 tailroom = skb_tailroom(skb);
82 limit = TIPC_SKB_MAX - skb->len;
83
84 if (tailroom < limit)
85 return tailroom;
86
87 return limit;
88}
89
90static inline int TLV_GET_DATA_LEN(struct tlv_desc *tlv)
91{
92 return TLV_GET_LEN(tlv) - TLV_SPACE(0);
93}
94
95static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len)
96{
97 struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb);
98
99 if (tipc_skb_tailroom(skb) < TLV_SPACE(len))
100 return -EMSGSIZE;
101
102 skb_put(skb, TLV_SPACE(len));
103 tlv->tlv_type = htons(type);
104 tlv->tlv_len = htons(TLV_LENGTH(len));
105 if (len && data)
106 memcpy(TLV_DATA(tlv), data, len);
107
108 return 0;
109}
110
111static void tipc_tlv_init(struct sk_buff *skb, u16 type)
112{
113 struct tlv_desc *tlv = (struct tlv_desc *)skb->data;
114
115 TLV_SET_LEN(tlv, 0);
116 TLV_SET_TYPE(tlv, type);
117 skb_put(skb, sizeof(struct tlv_desc));
118}
119
120static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...)
121{
122 int n;
123 u16 len;
124 u32 rem;
125 char *buf;
126 struct tlv_desc *tlv;
127 va_list args;
128
129 rem = tipc_skb_tailroom(skb);
130
131 tlv = (struct tlv_desc *)skb->data;
132 len = TLV_GET_LEN(tlv);
133 buf = TLV_DATA(tlv) + len;
134
135 va_start(args, fmt);
136 n = vscnprintf(buf, rem, fmt, args);
137 va_end(args);
138
139 TLV_SET_LEN(tlv, n + len);
140 skb_put(skb, n);
141
142 return n;
143}
144
145static struct sk_buff *tipc_tlv_alloc(int size)
146{
147 int hdr_len;
148 struct sk_buff *buf;
149
150 size = TLV_SPACE(size);
151 hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
152
153 buf = alloc_skb(hdr_len + size, GFP_KERNEL);
154 if (!buf)
155 return NULL;
156
157 skb_reserve(buf, hdr_len);
158
159 return buf;
160}
161
162static struct sk_buff *tipc_get_err_tlv(char *str)
163{
164 int str_len = strlen(str) + 1;
165 struct sk_buff *buf;
166
167 buf = tipc_tlv_alloc(TLV_SPACE(str_len));
168 if (buf)
169 tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
170
171 return buf;
172}
173
174static inline bool string_is_valid(char *s, int len)
175{
176 return memchr(s, '\0', len) ? true : false;
177}
178
179static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
180 struct tipc_nl_compat_msg *msg,
181 struct sk_buff *arg)
182{
183 int len = 0;
184 int err;
185 struct sk_buff *buf;
186 struct nlmsghdr *nlmsg;
187 struct netlink_callback cb;
188
189 memset(&cb, 0, sizeof(cb));
190 cb.nlh = (struct nlmsghdr *)arg->data;
191 cb.skb = arg;
192
193 buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
194 if (!buf)
195 return -ENOMEM;
196
197 buf->sk = msg->dst_sk;
198 if (__tipc_dump_start(&cb, msg->net)) {
199 kfree_skb(buf);
200 return -ENOMEM;
201 }
202
203 do {
204 int rem;
205
206 len = (*cmd->dumpit)(buf, &cb);
207
208 nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
209 struct nlattr **attrs;
210
211 err = tipc_nlmsg_parse(nlmsg, &attrs);
212 if (err)
213 goto err_out;
214
215 err = (*cmd->format)(msg, attrs);
216 if (err)
217 goto err_out;
218
219 if (tipc_skb_tailroom(msg->rep) <= 1) {
220 err = -EMSGSIZE;
221 goto err_out;
222 }
223 }
224
225 skb_reset_tail_pointer(buf);
226 buf->len = 0;
227
228 } while (len);
229
230 err = 0;
231
232err_out:
233 tipc_dump_done(&cb);
234 kfree_skb(buf);
235
236 if (err == -EMSGSIZE) {
237
238
239
240 if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
241 char *tail = skb_tail_pointer(msg->rep);
242
243 if (*tail != '\0')
244 sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
245 REPLY_TRUNCATED);
246 }
247
248 return 0;
249 }
250
251 return err;
252}
253
254static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
255 struct tipc_nl_compat_msg *msg)
256{
257 int err;
258 struct sk_buff *arg;
259
260 if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
261 return -EINVAL;
262
263 msg->rep = tipc_tlv_alloc(msg->rep_size);
264 if (!msg->rep)
265 return -ENOMEM;
266
267 if (msg->rep_type)
268 tipc_tlv_init(msg->rep, msg->rep_type);
269
270 if (cmd->header)
271 (*cmd->header)(msg);
272
273 arg = nlmsg_new(0, GFP_KERNEL);
274 if (!arg) {
275 kfree_skb(msg->rep);
276 msg->rep = NULL;
277 return -ENOMEM;
278 }
279
280 err = __tipc_nl_compat_dumpit(cmd, msg, arg);
281 if (err) {
282 kfree_skb(msg->rep);
283 msg->rep = NULL;
284 }
285 kfree_skb(arg);
286
287 return err;
288}
289
290static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
291 struct tipc_nl_compat_msg *msg)
292{
293 int err;
294 struct sk_buff *doit_buf;
295 struct sk_buff *trans_buf;
296 struct nlattr **attrbuf;
297 struct genl_info info;
298
299 trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
300 if (!trans_buf)
301 return -ENOMEM;
302
303 attrbuf = kmalloc_array(tipc_genl_family.maxattr + 1,
304 sizeof(struct nlattr *),
305 GFP_KERNEL);
306 if (!attrbuf) {
307 err = -ENOMEM;
308 goto trans_out;
309 }
310
311 doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
312 if (!doit_buf) {
313 err = -ENOMEM;
314 goto attrbuf_out;
315 }
316
317 memset(&info, 0, sizeof(info));
318 info.attrs = attrbuf;
319
320 rtnl_lock();
321 err = (*cmd->transcode)(cmd, trans_buf, msg);
322 if (err)
323 goto doit_out;
324
325 err = nla_parse(attrbuf, tipc_genl_family.maxattr,
326 (const struct nlattr *)trans_buf->data,
327 trans_buf->len, NULL, NULL);
328 if (err)
329 goto doit_out;
330
331 doit_buf->sk = msg->dst_sk;
332
333 err = (*cmd->doit)(doit_buf, &info);
334doit_out:
335 rtnl_unlock();
336
337 kfree_skb(doit_buf);
338attrbuf_out:
339 kfree(attrbuf);
340trans_out:
341 kfree_skb(trans_buf);
342
343 return err;
344}
345
346static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
347 struct tipc_nl_compat_msg *msg)
348{
349 int err;
350
351 if (msg->req_type && !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
359 msg->rep = tipc_tlv_alloc(0);
360 if (!msg->rep)
361 return -ENOMEM;
362
363 return 0;
364}
365
366static 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
385static 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 = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_BEARER_NAME);
401 if (!string_is_valid(b->name, len))
402 return -EINVAL;
403
404 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
405 return -EMSGSIZE;
406
407 if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
408 return -EMSGSIZE;
409
410 if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
411 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
412 if (!prop)
413 return -EMSGSIZE;
414 if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
415 return -EMSGSIZE;
416 nla_nest_end(skb, prop);
417 }
418 nla_nest_end(skb, bearer);
419
420 return 0;
421}
422
423static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
424 struct sk_buff *skb,
425 struct tipc_nl_compat_msg *msg)
426{
427 char *name;
428 struct nlattr *bearer;
429 int len;
430
431 name = (char *)TLV_DATA(msg->req);
432
433 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
434 if (!bearer)
435 return -EMSGSIZE;
436
437 len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_BEARER_NAME);
438 if (!string_is_valid(name, len))
439 return -EINVAL;
440
441 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
442 return -EMSGSIZE;
443
444 nla_nest_end(skb, bearer);
445
446 return 0;
447}
448
449static inline u32 perc(u32 count, u32 total)
450{
451 return (count * 100 + (total / 2)) / total;
452}
453
454static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
455 struct nlattr *prop[], struct nlattr *stats[])
456{
457 tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
458 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
459
460 tipc_tlv_sprintf(msg->rep,
461 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
462 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
463 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
464 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
465 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
466 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
467
468 tipc_tlv_sprintf(msg->rep,
469 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
470 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
471 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
472 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
473 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
474 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
475
476 tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
477 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
478 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
479 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
480
481 tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
482 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
483 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
484 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
485
486 tipc_tlv_sprintf(msg->rep,
487 " Congestion link:%u Send queue max:%u avg:%u",
488 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
489 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
490 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
491}
492
493static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
494 struct nlattr **attrs)
495{
496 char *name;
497 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
498 struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
499 struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
500 int err;
501 int len;
502
503 if (!attrs[TIPC_NLA_LINK])
504 return -EINVAL;
505
506 err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK],
507 NULL, NULL);
508 if (err)
509 return err;
510
511 if (!link[TIPC_NLA_LINK_PROP])
512 return -EINVAL;
513
514 err = nla_parse_nested(prop, TIPC_NLA_PROP_MAX,
515 link[TIPC_NLA_LINK_PROP], NULL, NULL);
516 if (err)
517 return err;
518
519 if (!link[TIPC_NLA_LINK_STATS])
520 return -EINVAL;
521
522 err = nla_parse_nested(stats, TIPC_NLA_STATS_MAX,
523 link[TIPC_NLA_LINK_STATS], NULL, NULL);
524 if (err)
525 return err;
526
527 name = (char *)TLV_DATA(msg->req);
528
529 len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_LINK_NAME);
530 if (!string_is_valid(name, len))
531 return -EINVAL;
532
533 if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
534 return 0;
535
536 tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
537 nla_data(link[TIPC_NLA_LINK_NAME]));
538
539 if (link[TIPC_NLA_LINK_BROADCAST]) {
540 __fill_bc_link_stat(msg, prop, stats);
541 return 0;
542 }
543
544 if (link[TIPC_NLA_LINK_ACTIVE])
545 tipc_tlv_sprintf(msg->rep, " ACTIVE");
546 else if (link[TIPC_NLA_LINK_UP])
547 tipc_tlv_sprintf(msg->rep, " STANDBY");
548 else
549 tipc_tlv_sprintf(msg->rep, " DEFUNCT");
550
551 tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
552 nla_get_u32(link[TIPC_NLA_LINK_MTU]),
553 nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
554
555 tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
556 nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
557 nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
558
559 tipc_tlv_sprintf(msg->rep,
560 " RX packets:%u fragments:%u/%u bundles:%u/%u\n",
561 nla_get_u32(link[TIPC_NLA_LINK_RX]) -
562 nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
563 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
564 nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
565 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
566 nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
567
568 tipc_tlv_sprintf(msg->rep,
569 " TX packets:%u fragments:%u/%u bundles:%u/%u\n",
570 nla_get_u32(link[TIPC_NLA_LINK_TX]) -
571 nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
572 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
573 nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
574 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
575 nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
576
577 tipc_tlv_sprintf(msg->rep,
578 " TX profile sample:%u packets average:%u octets\n",
579 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
580 nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
581 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
582
583 tipc_tlv_sprintf(msg->rep,
584 " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
585 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
586 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
587 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
588 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
589 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
590 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
591 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
592 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
593
594 tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
595 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
596 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
597 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
598 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
599 perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
600 nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
601
602 tipc_tlv_sprintf(msg->rep,
603 " RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
604 nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
605 nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
606 nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
607 nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
608 nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
609
610 tipc_tlv_sprintf(msg->rep,
611 " TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
612 nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
613 nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
614 nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
615 nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
616 nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
617
618 tipc_tlv_sprintf(msg->rep,
619 " Congestion link:%u Send queue max:%u avg:%u",
620 nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
621 nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
622 nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
623
624 return 0;
625}
626
627static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
628 struct nlattr **attrs)
629{
630 struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
631 struct tipc_link_info link_info;
632 int err;
633
634 if (!attrs[TIPC_NLA_LINK])
635 return -EINVAL;
636
637 err = nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK],
638 NULL, NULL);
639 if (err)
640 return err;
641
642 link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
643 link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
644 nla_strlcpy(link_info.str, link[TIPC_NLA_LINK_NAME],
645 TIPC_MAX_LINK_NAME);
646
647 return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
648 &link_info, sizeof(link_info));
649}
650
651static int __tipc_add_link_prop(struct sk_buff *skb,
652 struct tipc_nl_compat_msg *msg,
653 struct tipc_link_config *lc)
654{
655 switch (msg->cmd) {
656 case TIPC_CMD_SET_LINK_PRI:
657 return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
658 case TIPC_CMD_SET_LINK_TOL:
659 return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
660 case TIPC_CMD_SET_LINK_WINDOW:
661 return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
662 }
663
664 return -EINVAL;
665}
666
667static int tipc_nl_compat_media_set(struct sk_buff *skb,
668 struct tipc_nl_compat_msg *msg)
669{
670 struct nlattr *prop;
671 struct nlattr *media;
672 struct tipc_link_config *lc;
673 int len;
674
675 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
676
677 media = nla_nest_start(skb, TIPC_NLA_MEDIA);
678 if (!media)
679 return -EMSGSIZE;
680
681 len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME);
682 if (!string_is_valid(lc->name, len))
683 return -EINVAL;
684
685 if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
686 return -EMSGSIZE;
687
688 prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP);
689 if (!prop)
690 return -EMSGSIZE;
691
692 __tipc_add_link_prop(skb, msg, lc);
693 nla_nest_end(skb, prop);
694 nla_nest_end(skb, media);
695
696 return 0;
697}
698
699static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
700 struct tipc_nl_compat_msg *msg)
701{
702 struct nlattr *prop;
703 struct nlattr *bearer;
704 struct tipc_link_config *lc;
705 int len;
706
707 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
708
709 bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
710 if (!bearer)
711 return -EMSGSIZE;
712
713 len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_MEDIA_NAME);
714 if (!string_is_valid(lc->name, len))
715 return -EINVAL;
716
717 if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
718 return -EMSGSIZE;
719
720 prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
721 if (!prop)
722 return -EMSGSIZE;
723
724 __tipc_add_link_prop(skb, msg, lc);
725 nla_nest_end(skb, prop);
726 nla_nest_end(skb, bearer);
727
728 return 0;
729}
730
731static int __tipc_nl_compat_link_set(struct sk_buff *skb,
732 struct tipc_nl_compat_msg *msg)
733{
734 struct nlattr *prop;
735 struct nlattr *link;
736 struct tipc_link_config *lc;
737
738 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
739
740 link = nla_nest_start(skb, TIPC_NLA_LINK);
741 if (!link)
742 return -EMSGSIZE;
743
744 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
745 return -EMSGSIZE;
746
747 prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP);
748 if (!prop)
749 return -EMSGSIZE;
750
751 __tipc_add_link_prop(skb, msg, lc);
752 nla_nest_end(skb, prop);
753 nla_nest_end(skb, link);
754
755 return 0;
756}
757
758static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
759 struct sk_buff *skb,
760 struct tipc_nl_compat_msg *msg)
761{
762 struct tipc_link_config *lc;
763 struct tipc_bearer *bearer;
764 struct tipc_media *media;
765 int len;
766
767 lc = (struct tipc_link_config *)TLV_DATA(msg->req);
768
769 len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_LINK_NAME);
770 if (!string_is_valid(lc->name, len))
771 return -EINVAL;
772
773 media = tipc_media_find(lc->name);
774 if (media) {
775 cmd->doit = &__tipc_nl_media_set;
776 return tipc_nl_compat_media_set(skb, msg);
777 }
778
779 bearer = tipc_bearer_find(msg->net, lc->name);
780 if (bearer) {
781 cmd->doit = &__tipc_nl_bearer_set;
782 return tipc_nl_compat_bearer_set(skb, msg);
783 }
784
785 return __tipc_nl_compat_link_set(skb, msg);
786}
787
788static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
789 struct sk_buff *skb,
790 struct tipc_nl_compat_msg *msg)
791{
792 char *name;
793 struct nlattr *link;
794 int len;
795
796 name = (char *)TLV_DATA(msg->req);
797
798 link = nla_nest_start(skb, TIPC_NLA_LINK);
799 if (!link)
800 return -EMSGSIZE;
801
802 len = min_t(int, TLV_GET_DATA_LEN(msg->req), TIPC_MAX_LINK_NAME);
803 if (!string_is_valid(name, len))
804 return -EINVAL;
805
806 if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name))
807 return -EMSGSIZE;
808
809 nla_nest_end(skb, link);
810
811 return 0;
812}
813
814static int tipc_nl_compat_name_table_dump_header(struct tipc_nl_compat_msg *msg)
815{
816 int i;
817 u32 depth;
818 struct tipc_name_table_query *ntq;
819 static const char * const header[] = {
820 "Type ",
821 "Lower Upper ",
822 "Port Identity ",
823 "Publication Scope"
824 };
825
826 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
827 if (TLV_GET_DATA_LEN(msg->req) < sizeof(struct tipc_name_table_query))
828 return -EINVAL;
829
830 depth = ntohl(ntq->depth);
831
832 if (depth > 4)
833 depth = 4;
834 for (i = 0; i < depth; i++)
835 tipc_tlv_sprintf(msg->rep, header[i]);
836 tipc_tlv_sprintf(msg->rep, "\n");
837
838 return 0;
839}
840
841static int tipc_nl_compat_name_table_dump(struct tipc_nl_compat_msg *msg,
842 struct nlattr **attrs)
843{
844 char port_str[27];
845 struct tipc_name_table_query *ntq;
846 struct nlattr *nt[TIPC_NLA_NAME_TABLE_MAX + 1];
847 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
848 u32 node, depth, type, lowbound, upbound;
849 static const char * const scope_str[] = {"", " zone", " cluster",
850 " node"};
851 int err;
852
853 if (!attrs[TIPC_NLA_NAME_TABLE])
854 return -EINVAL;
855
856 err = nla_parse_nested(nt, TIPC_NLA_NAME_TABLE_MAX,
857 attrs[TIPC_NLA_NAME_TABLE], NULL, NULL);
858 if (err)
859 return err;
860
861 if (!nt[TIPC_NLA_NAME_TABLE_PUBL])
862 return -EINVAL;
863
864 err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX,
865 nt[TIPC_NLA_NAME_TABLE_PUBL], NULL, NULL);
866 if (err)
867 return err;
868
869 ntq = (struct tipc_name_table_query *)TLV_DATA(msg->req);
870
871 depth = ntohl(ntq->depth);
872 type = ntohl(ntq->type);
873 lowbound = ntohl(ntq->lowbound);
874 upbound = ntohl(ntq->upbound);
875
876 if (!(depth & TIPC_NTQ_ALLTYPES) &&
877 (type != nla_get_u32(publ[TIPC_NLA_PUBL_TYPE])))
878 return 0;
879 if (lowbound && (lowbound > nla_get_u32(publ[TIPC_NLA_PUBL_UPPER])))
880 return 0;
881 if (upbound && (upbound < nla_get_u32(publ[TIPC_NLA_PUBL_LOWER])))
882 return 0;
883
884 tipc_tlv_sprintf(msg->rep, "%-10u ",
885 nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]));
886
887 if (depth == 1)
888 goto out;
889
890 tipc_tlv_sprintf(msg->rep, "%-10u %-10u ",
891 nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]),
892 nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]));
893
894 if (depth == 2)
895 goto out;
896
897 node = nla_get_u32(publ[TIPC_NLA_PUBL_NODE]);
898 sprintf(port_str, "<%u.%u.%u:%u>", tipc_zone(node), tipc_cluster(node),
899 tipc_node(node), nla_get_u32(publ[TIPC_NLA_PUBL_REF]));
900 tipc_tlv_sprintf(msg->rep, "%-26s ", port_str);
901
902 if (depth == 3)
903 goto out;
904
905 tipc_tlv_sprintf(msg->rep, "%-10u %s",
906 nla_get_u32(publ[TIPC_NLA_PUBL_KEY]),
907 scope_str[nla_get_u32(publ[TIPC_NLA_PUBL_SCOPE])]);
908out:
909 tipc_tlv_sprintf(msg->rep, "\n");
910
911 return 0;
912}
913
914static int __tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg,
915 struct nlattr **attrs)
916{
917 u32 type, lower, upper;
918 struct nlattr *publ[TIPC_NLA_PUBL_MAX + 1];
919 int err;
920
921 if (!attrs[TIPC_NLA_PUBL])
922 return -EINVAL;
923
924 err = nla_parse_nested(publ, TIPC_NLA_PUBL_MAX, attrs[TIPC_NLA_PUBL],
925 NULL, NULL);
926 if (err)
927 return err;
928
929 type = nla_get_u32(publ[TIPC_NLA_PUBL_TYPE]);
930 lower = nla_get_u32(publ[TIPC_NLA_PUBL_LOWER]);
931 upper = nla_get_u32(publ[TIPC_NLA_PUBL_UPPER]);
932
933 if (lower == upper)
934 tipc_tlv_sprintf(msg->rep, " {%u,%u}", type, lower);
935 else
936 tipc_tlv_sprintf(msg->rep, " {%u,%u,%u}", type, lower, upper);
937
938 return 0;
939}
940
941static int tipc_nl_compat_publ_dump(struct tipc_nl_compat_msg *msg, u32 sock)
942{
943 int err;
944 void *hdr;
945 struct nlattr *nest;
946 struct sk_buff *args;
947 struct tipc_nl_compat_cmd_dump dump;
948
949 args = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
950 if (!args)
951 return -ENOMEM;
952
953 hdr = genlmsg_put(args, 0, 0, &tipc_genl_family, NLM_F_MULTI,
954 TIPC_NL_PUBL_GET);
955 if (!hdr) {
956 kfree_skb(args);
957 return -EMSGSIZE;
958 }
959
960 nest = nla_nest_start(args, TIPC_NLA_SOCK);
961 if (!nest) {
962 kfree_skb(args);
963 return -EMSGSIZE;
964 }
965
966 if (nla_put_u32(args, TIPC_NLA_SOCK_REF, sock)) {
967 kfree_skb(args);
968 return -EMSGSIZE;
969 }
970
971 nla_nest_end(args, nest);
972 genlmsg_end(args, hdr);
973
974 dump.dumpit = tipc_nl_publ_dump;
975 dump.format = __tipc_nl_compat_publ_dump;
976
977 err = __tipc_nl_compat_dumpit(&dump, msg, args);
978
979 kfree_skb(args);
980
981 return err;
982}
983
984static int tipc_nl_compat_sk_dump(struct tipc_nl_compat_msg *msg,
985 struct nlattr **attrs)
986{
987 int err;
988 u32 sock_ref;
989 struct nlattr *sock[TIPC_NLA_SOCK_MAX + 1];
990
991 if (!attrs[TIPC_NLA_SOCK])
992 return -EINVAL;
993
994 err = nla_parse_nested(sock, TIPC_NLA_SOCK_MAX, attrs[TIPC_NLA_SOCK],
995 NULL, NULL);
996 if (err)
997 return err;
998
999 sock_ref = nla_get_u32(sock[TIPC_NLA_SOCK_REF]);
1000 tipc_tlv_sprintf(msg->rep, "%u:", sock_ref);
1001
1002 if (sock[TIPC_NLA_SOCK_CON]) {
1003 u32 node;
1004 struct nlattr *con[TIPC_NLA_CON_MAX + 1];
1005
1006 err = nla_parse_nested(con, TIPC_NLA_CON_MAX,
1007 sock[TIPC_NLA_SOCK_CON], NULL, NULL);
1008
1009 if (err)
1010 return err;
1011
1012 node = nla_get_u32(con[TIPC_NLA_CON_NODE]);
1013 tipc_tlv_sprintf(msg->rep, " connected to <%u.%u.%u:%u>",
1014 tipc_zone(node),
1015 tipc_cluster(node),
1016 tipc_node(node),
1017 nla_get_u32(con[TIPC_NLA_CON_SOCK]));
1018
1019 if (con[TIPC_NLA_CON_FLAG])
1020 tipc_tlv_sprintf(msg->rep, " via {%u,%u}\n",
1021 nla_get_u32(con[TIPC_NLA_CON_TYPE]),
1022 nla_get_u32(con[TIPC_NLA_CON_INST]));
1023 else
1024 tipc_tlv_sprintf(msg->rep, "\n");
1025 } else if (sock[TIPC_NLA_SOCK_HAS_PUBL]) {
1026 tipc_tlv_sprintf(msg->rep, " bound to");
1027
1028 err = tipc_nl_compat_publ_dump(msg, sock_ref);
1029 if (err)
1030 return err;
1031 }
1032 tipc_tlv_sprintf(msg->rep, "\n");
1033
1034 return 0;
1035}
1036
1037static int tipc_nl_compat_media_dump(struct tipc_nl_compat_msg *msg,
1038 struct nlattr **attrs)
1039{
1040 struct nlattr *media[TIPC_NLA_MEDIA_MAX + 1];
1041 int err;
1042
1043 if (!attrs[TIPC_NLA_MEDIA])
1044 return -EINVAL;
1045
1046 err = nla_parse_nested(media, TIPC_NLA_MEDIA_MAX,
1047 attrs[TIPC_NLA_MEDIA], NULL, NULL);
1048 if (err)
1049 return err;
1050
1051 return tipc_add_tlv(msg->rep, TIPC_TLV_MEDIA_NAME,
1052 nla_data(media[TIPC_NLA_MEDIA_NAME]),
1053 nla_len(media[TIPC_NLA_MEDIA_NAME]));
1054}
1055
1056static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
1057 struct nlattr **attrs)
1058{
1059 struct tipc_node_info node_info;
1060 struct nlattr *node[TIPC_NLA_NODE_MAX + 1];
1061 int err;
1062
1063 if (!attrs[TIPC_NLA_NODE])
1064 return -EINVAL;
1065
1066 err = nla_parse_nested(node, TIPC_NLA_NODE_MAX, attrs[TIPC_NLA_NODE],
1067 NULL, NULL);
1068 if (err)
1069 return err;
1070
1071 node_info.addr = htonl(nla_get_u32(node[TIPC_NLA_NODE_ADDR]));
1072 node_info.up = htonl(nla_get_flag(node[TIPC_NLA_NODE_UP]));
1073
1074 return tipc_add_tlv(msg->rep, TIPC_TLV_NODE_INFO, &node_info,
1075 sizeof(node_info));
1076}
1077
1078static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
1079 struct sk_buff *skb,
1080 struct tipc_nl_compat_msg *msg)
1081{
1082 u32 val;
1083 struct nlattr *net;
1084
1085 val = ntohl(*(__be32 *)TLV_DATA(msg->req));
1086
1087 net = nla_nest_start(skb, TIPC_NLA_NET);
1088 if (!net)
1089 return -EMSGSIZE;
1090
1091 if (msg->cmd == TIPC_CMD_SET_NODE_ADDR) {
1092 if (nla_put_u32(skb, TIPC_NLA_NET_ADDR, val))
1093 return -EMSGSIZE;
1094 } else if (msg->cmd == TIPC_CMD_SET_NETID) {
1095 if (nla_put_u32(skb, TIPC_NLA_NET_ID, val))
1096 return -EMSGSIZE;
1097 }
1098 nla_nest_end(skb, net);
1099
1100 return 0;
1101}
1102
1103static int tipc_nl_compat_net_dump(struct tipc_nl_compat_msg *msg,
1104 struct nlattr **attrs)
1105{
1106 __be32 id;
1107 struct nlattr *net[TIPC_NLA_NET_MAX + 1];
1108 int err;
1109
1110 if (!attrs[TIPC_NLA_NET])
1111 return -EINVAL;
1112
1113 err = nla_parse_nested(net, TIPC_NLA_NET_MAX, attrs[TIPC_NLA_NET],
1114 NULL, NULL);
1115 if (err)
1116 return err;
1117
1118 id = htonl(nla_get_u32(net[TIPC_NLA_NET_ID]));
1119
1120 return tipc_add_tlv(msg->rep, TIPC_TLV_UNSIGNED, &id, sizeof(id));
1121}
1122
1123static int tipc_cmd_show_stats_compat(struct tipc_nl_compat_msg *msg)
1124{
1125 msg->rep = tipc_tlv_alloc(ULTRA_STRING_MAX_LEN);
1126 if (!msg->rep)
1127 return -ENOMEM;
1128
1129 tipc_tlv_init(msg->rep, TIPC_TLV_ULTRA_STRING);
1130 tipc_tlv_sprintf(msg->rep, "TIPC version " TIPC_MOD_VER "\n");
1131
1132 return 0;
1133}
1134
1135static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
1136{
1137 struct tipc_nl_compat_cmd_dump dump;
1138 struct tipc_nl_compat_cmd_doit doit;
1139
1140 memset(&dump, 0, sizeof(dump));
1141 memset(&doit, 0, sizeof(doit));
1142
1143 switch (msg->cmd) {
1144 case TIPC_CMD_NOOP:
1145 msg->rep = tipc_tlv_alloc(0);
1146 if (!msg->rep)
1147 return -ENOMEM;
1148 return 0;
1149 case TIPC_CMD_GET_BEARER_NAMES:
1150 msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
1151 dump.dumpit = tipc_nl_bearer_dump;
1152 dump.format = tipc_nl_compat_bearer_dump;
1153 return tipc_nl_compat_dumpit(&dump, msg);
1154 case TIPC_CMD_ENABLE_BEARER:
1155 msg->req_type = TIPC_TLV_BEARER_CONFIG;
1156 doit.doit = __tipc_nl_bearer_enable;
1157 doit.transcode = tipc_nl_compat_bearer_enable;
1158 return tipc_nl_compat_doit(&doit, msg);
1159 case TIPC_CMD_DISABLE_BEARER:
1160 msg->req_type = TIPC_TLV_BEARER_NAME;
1161 doit.doit = __tipc_nl_bearer_disable;
1162 doit.transcode = tipc_nl_compat_bearer_disable;
1163 return tipc_nl_compat_doit(&doit, msg);
1164 case TIPC_CMD_SHOW_LINK_STATS:
1165 msg->req_type = TIPC_TLV_LINK_NAME;
1166 msg->rep_size = ULTRA_STRING_MAX_LEN;
1167 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1168 dump.dumpit = tipc_nl_node_dump_link;
1169 dump.format = tipc_nl_compat_link_stat_dump;
1170 return tipc_nl_compat_dumpit(&dump, msg);
1171 case TIPC_CMD_GET_LINKS:
1172 msg->req_type = TIPC_TLV_NET_ADDR;
1173 msg->rep_size = ULTRA_STRING_MAX_LEN;
1174 dump.dumpit = tipc_nl_node_dump_link;
1175 dump.format = tipc_nl_compat_link_dump;
1176 return tipc_nl_compat_dumpit(&dump, msg);
1177 case TIPC_CMD_SET_LINK_TOL:
1178 case TIPC_CMD_SET_LINK_PRI:
1179 case TIPC_CMD_SET_LINK_WINDOW:
1180 msg->req_type = TIPC_TLV_LINK_CONFIG;
1181 doit.doit = tipc_nl_node_set_link;
1182 doit.transcode = tipc_nl_compat_link_set;
1183 return tipc_nl_compat_doit(&doit, msg);
1184 case TIPC_CMD_RESET_LINK_STATS:
1185 msg->req_type = TIPC_TLV_LINK_NAME;
1186 doit.doit = tipc_nl_node_reset_link_stats;
1187 doit.transcode = tipc_nl_compat_link_reset_stats;
1188 return tipc_nl_compat_doit(&doit, msg);
1189 case TIPC_CMD_SHOW_NAME_TABLE:
1190 msg->req_type = TIPC_TLV_NAME_TBL_QUERY;
1191 msg->rep_size = ULTRA_STRING_MAX_LEN;
1192 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1193 dump.header = tipc_nl_compat_name_table_dump_header;
1194 dump.dumpit = tipc_nl_name_table_dump;
1195 dump.format = tipc_nl_compat_name_table_dump;
1196 return tipc_nl_compat_dumpit(&dump, msg);
1197 case TIPC_CMD_SHOW_PORTS:
1198 msg->rep_size = ULTRA_STRING_MAX_LEN;
1199 msg->rep_type = TIPC_TLV_ULTRA_STRING;
1200 dump.dumpit = tipc_nl_sk_dump;
1201 dump.format = tipc_nl_compat_sk_dump;
1202 return tipc_nl_compat_dumpit(&dump, msg);
1203 case TIPC_CMD_GET_MEDIA_NAMES:
1204 msg->rep_size = MAX_MEDIA * TLV_SPACE(TIPC_MAX_MEDIA_NAME);
1205 dump.dumpit = tipc_nl_media_dump;
1206 dump.format = tipc_nl_compat_media_dump;
1207 return tipc_nl_compat_dumpit(&dump, msg);
1208 case TIPC_CMD_GET_NODES:
1209 msg->rep_size = ULTRA_STRING_MAX_LEN;
1210 dump.dumpit = tipc_nl_node_dump;
1211 dump.format = tipc_nl_compat_node_dump;
1212 return tipc_nl_compat_dumpit(&dump, msg);
1213 case TIPC_CMD_SET_NODE_ADDR:
1214 msg->req_type = TIPC_TLV_NET_ADDR;
1215 doit.doit = __tipc_nl_net_set;
1216 doit.transcode = tipc_nl_compat_net_set;
1217 return tipc_nl_compat_doit(&doit, msg);
1218 case TIPC_CMD_SET_NETID:
1219 msg->req_type = TIPC_TLV_UNSIGNED;
1220 doit.doit = __tipc_nl_net_set;
1221 doit.transcode = tipc_nl_compat_net_set;
1222 return tipc_nl_compat_doit(&doit, msg);
1223 case TIPC_CMD_GET_NETID:
1224 msg->rep_size = sizeof(u32);
1225 dump.dumpit = tipc_nl_net_dump;
1226 dump.format = tipc_nl_compat_net_dump;
1227 return tipc_nl_compat_dumpit(&dump, msg);
1228 case TIPC_CMD_SHOW_STATS:
1229 return tipc_cmd_show_stats_compat(msg);
1230 }
1231
1232 return -EOPNOTSUPP;
1233}
1234
1235static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
1236{
1237 int err;
1238 int len;
1239 struct tipc_nl_compat_msg msg;
1240 struct nlmsghdr *req_nlh;
1241 struct nlmsghdr *rep_nlh;
1242 struct tipc_genlmsghdr *req_userhdr = info->userhdr;
1243
1244 memset(&msg, 0, sizeof(msg));
1245
1246 req_nlh = (struct nlmsghdr *)skb->data;
1247 msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
1248 msg.cmd = req_userhdr->cmd;
1249 msg.net = genl_info_net(info);
1250 msg.dst_sk = skb->sk;
1251
1252 if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
1253 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
1254 err = -EACCES;
1255 goto send;
1256 }
1257
1258 len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
1259 if (!len || !TLV_OK(msg.req, len)) {
1260 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1261 err = -EOPNOTSUPP;
1262 goto send;
1263 }
1264
1265 err = tipc_nl_compat_handle(&msg);
1266 if ((err == -EOPNOTSUPP) || (err == -EPERM))
1267 msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
1268 else if (err == -EINVAL)
1269 msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
1270send:
1271 if (!msg.rep)
1272 return err;
1273
1274 len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
1275 skb_push(msg.rep, len);
1276 rep_nlh = nlmsg_hdr(msg.rep);
1277 memcpy(rep_nlh, info->nlhdr, len);
1278 rep_nlh->nlmsg_len = msg.rep->len;
1279 genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
1280
1281 return err;
1282}
1283
1284static const struct genl_ops tipc_genl_compat_ops[] = {
1285 {
1286 .cmd = TIPC_GENL_CMD,
1287 .doit = tipc_nl_compat_recv,
1288 },
1289};
1290
1291static struct genl_family tipc_genl_compat_family __ro_after_init = {
1292 .name = TIPC_GENL_NAME,
1293 .version = TIPC_GENL_VERSION,
1294 .hdrsize = TIPC_GENL_HDRLEN,
1295 .maxattr = 0,
1296 .netnsok = true,
1297 .module = THIS_MODULE,
1298 .ops = tipc_genl_compat_ops,
1299 .n_ops = ARRAY_SIZE(tipc_genl_compat_ops),
1300};
1301
1302int __init tipc_netlink_compat_start(void)
1303{
1304 int res;
1305
1306 res = genl_register_family(&tipc_genl_compat_family);
1307 if (res) {
1308 pr_err("Failed to register legacy compat interface\n");
1309 return res;
1310 }
1311
1312 return 0;
1313}
1314
1315void tipc_netlink_compat_stop(void)
1316{
1317 genl_unregister_family(&tipc_genl_compat_family);
1318}
1319
