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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" | |
35 | #include "config.h" | |
d0796d1e | 36 | #include "bearer.h" |
f2b3b2d4 | 37 | #include "link.h" |
bfb3e5dd RA |
38 | #include <net/genetlink.h> |
39 | #include <linux/tipc_config.h> | |
40 | ||
d0796d1e RA |
41 | /* The legacy API had an artificial message length limit called |
42 | * ULTRA_STRING_MAX_LEN. | |
43 | */ | |
44 | #define ULTRA_STRING_MAX_LEN 32768 | |
45 | ||
46 | #define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN) | |
47 | ||
48 | #define REPLY_TRUNCATED "<truncated>\n" | |
49 | ||
50 | struct tipc_nl_compat_msg { | |
51 | u16 cmd; | |
f2b3b2d4 | 52 | int rep_type; |
d0796d1e | 53 | int rep_size; |
9ab15465 | 54 | int req_type; |
d0796d1e RA |
55 | struct sk_buff *rep; |
56 | struct tlv_desc *req; | |
57 | struct sock *dst_sk; | |
58 | }; | |
59 | ||
60 | struct tipc_nl_compat_cmd_dump { | |
61 | int (*dumpit)(struct sk_buff *, struct netlink_callback *); | |
62 | int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs); | |
63 | }; | |
64 | ||
9ab15465 RA |
65 | struct tipc_nl_compat_cmd_doit { |
66 | int (*doit)(struct sk_buff *skb, struct genl_info *info); | |
67 | int (*transcode)(struct sk_buff *skb, struct tipc_nl_compat_msg *msg); | |
68 | }; | |
69 | ||
d0796d1e RA |
70 | static int tipc_skb_tailroom(struct sk_buff *skb) |
71 | { | |
72 | int tailroom; | |
73 | int limit; | |
74 | ||
75 | tailroom = skb_tailroom(skb); | |
76 | limit = TIPC_SKB_MAX - skb->len; | |
77 | ||
78 | if (tailroom < limit) | |
79 | return tailroom; | |
80 | ||
81 | return limit; | |
82 | } | |
83 | ||
84 | static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len) | |
85 | { | |
86 | struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb); | |
87 | ||
88 | if (tipc_skb_tailroom(skb) < TLV_SPACE(len)) | |
89 | return -EMSGSIZE; | |
90 | ||
91 | skb_put(skb, TLV_SPACE(len)); | |
92 | tlv->tlv_type = htons(type); | |
93 | tlv->tlv_len = htons(TLV_LENGTH(len)); | |
94 | if (len && data) | |
95 | memcpy(TLV_DATA(tlv), data, len); | |
96 | ||
97 | return 0; | |
98 | } | |
99 | ||
f2b3b2d4 RA |
100 | static void tipc_tlv_init(struct sk_buff *skb, u16 type) |
101 | { | |
102 | struct tlv_desc *tlv = (struct tlv_desc *)skb->data; | |
103 | ||
104 | TLV_SET_LEN(tlv, 0); | |
105 | TLV_SET_TYPE(tlv, type); | |
106 | skb_put(skb, sizeof(struct tlv_desc)); | |
107 | } | |
108 | ||
109 | static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...) | |
110 | { | |
111 | int n; | |
112 | u16 len; | |
113 | u32 rem; | |
114 | char *buf; | |
115 | struct tlv_desc *tlv; | |
116 | va_list args; | |
117 | ||
118 | rem = tipc_skb_tailroom(skb); | |
119 | ||
120 | tlv = (struct tlv_desc *)skb->data; | |
121 | len = TLV_GET_LEN(tlv); | |
122 | buf = TLV_DATA(tlv) + len; | |
123 | ||
124 | va_start(args, fmt); | |
125 | n = vscnprintf(buf, rem, fmt, args); | |
126 | va_end(args); | |
127 | ||
128 | TLV_SET_LEN(tlv, n + len); | |
129 | skb_put(skb, n); | |
130 | ||
131 | return n; | |
132 | } | |
133 | ||
d0796d1e RA |
134 | static struct sk_buff *tipc_tlv_alloc(int size) |
135 | { | |
136 | int hdr_len; | |
137 | struct sk_buff *buf; | |
138 | ||
139 | size = TLV_SPACE(size); | |
140 | hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); | |
141 | ||
142 | buf = alloc_skb(hdr_len + size, GFP_KERNEL); | |
143 | if (!buf) | |
144 | return NULL; | |
145 | ||
146 | skb_reserve(buf, hdr_len); | |
147 | ||
148 | return buf; | |
149 | } | |
150 | ||
151 | static struct sk_buff *tipc_get_err_tlv(char *str) | |
152 | { | |
153 | int str_len = strlen(str) + 1; | |
154 | struct sk_buff *buf; | |
155 | ||
156 | buf = tipc_tlv_alloc(TLV_SPACE(str_len)); | |
157 | if (buf) | |
158 | tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len); | |
159 | ||
160 | return buf; | |
161 | } | |
162 | ||
163 | static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, | |
164 | struct tipc_nl_compat_msg *msg, | |
165 | struct sk_buff *arg) | |
166 | { | |
167 | int len = 0; | |
168 | int err; | |
169 | struct sk_buff *buf; | |
170 | struct nlmsghdr *nlmsg; | |
171 | struct netlink_callback cb; | |
172 | ||
173 | memset(&cb, 0, sizeof(cb)); | |
174 | cb.nlh = (struct nlmsghdr *)arg->data; | |
175 | cb.skb = arg; | |
176 | ||
177 | buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); | |
178 | if (!buf) | |
179 | return -ENOMEM; | |
180 | ||
181 | buf->sk = msg->dst_sk; | |
182 | ||
183 | do { | |
184 | int rem; | |
185 | ||
186 | len = (*cmd->dumpit)(buf, &cb); | |
187 | ||
188 | nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) { | |
189 | struct nlattr **attrs; | |
190 | ||
191 | err = tipc_nlmsg_parse(nlmsg, &attrs); | |
192 | if (err) | |
193 | goto err_out; | |
194 | ||
195 | err = (*cmd->format)(msg, attrs); | |
196 | if (err) | |
197 | goto err_out; | |
198 | ||
199 | if (tipc_skb_tailroom(msg->rep) <= 1) { | |
200 | err = -EMSGSIZE; | |
201 | goto err_out; | |
202 | } | |
203 | } | |
204 | ||
205 | skb_reset_tail_pointer(buf); | |
206 | buf->len = 0; | |
207 | ||
208 | } while (len); | |
209 | ||
210 | err = 0; | |
211 | ||
212 | err_out: | |
213 | kfree_skb(buf); | |
214 | ||
215 | if (err == -EMSGSIZE) { | |
216 | /* The legacy API only considered messages filling | |
217 | * "ULTRA_STRING_MAX_LEN" to be truncated. | |
218 | */ | |
219 | if ((TIPC_SKB_MAX - msg->rep->len) <= 1) { | |
220 | char *tail = skb_tail_pointer(msg->rep); | |
221 | ||
222 | if (*tail != '\0') | |
223 | sprintf(tail - sizeof(REPLY_TRUNCATED) - 1, | |
224 | REPLY_TRUNCATED); | |
225 | } | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | return err; | |
231 | } | |
232 | ||
233 | static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd, | |
234 | struct tipc_nl_compat_msg *msg) | |
235 | { | |
236 | int err; | |
237 | struct sk_buff *arg; | |
238 | ||
f2b3b2d4 RA |
239 | if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type)) |
240 | return -EINVAL; | |
241 | ||
d0796d1e RA |
242 | msg->rep = tipc_tlv_alloc(msg->rep_size); |
243 | if (!msg->rep) | |
244 | return -ENOMEM; | |
245 | ||
f2b3b2d4 RA |
246 | if (msg->rep_type) |
247 | tipc_tlv_init(msg->rep, msg->rep_type); | |
248 | ||
d0796d1e RA |
249 | arg = nlmsg_new(0, GFP_KERNEL); |
250 | if (!arg) { | |
251 | kfree_skb(msg->rep); | |
252 | return -ENOMEM; | |
253 | } | |
254 | ||
255 | err = __tipc_nl_compat_dumpit(cmd, msg, arg); | |
256 | if (err) | |
257 | kfree_skb(msg->rep); | |
258 | ||
259 | kfree_skb(arg); | |
260 | ||
261 | return err; | |
262 | } | |
263 | ||
9ab15465 RA |
264 | static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, |
265 | struct tipc_nl_compat_msg *msg) | |
266 | { | |
267 | int err; | |
268 | struct sk_buff *doit_buf; | |
269 | struct sk_buff *trans_buf; | |
270 | struct nlattr **attrbuf; | |
271 | struct genl_info info; | |
272 | ||
273 | trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
274 | if (!trans_buf) | |
275 | return -ENOMEM; | |
276 | ||
277 | err = (*cmd->transcode)(trans_buf, msg); | |
278 | if (err) | |
279 | goto trans_out; | |
280 | ||
281 | attrbuf = kmalloc((tipc_genl_family.maxattr + 1) * | |
282 | sizeof(struct nlattr *), GFP_KERNEL); | |
283 | if (!attrbuf) { | |
284 | err = -ENOMEM; | |
285 | goto trans_out; | |
286 | } | |
287 | ||
288 | err = nla_parse(attrbuf, tipc_genl_family.maxattr, | |
289 | (const struct nlattr *)trans_buf->data, | |
290 | trans_buf->len, NULL); | |
291 | if (err) | |
292 | goto parse_out; | |
293 | ||
294 | doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); | |
295 | if (!doit_buf) { | |
296 | err = -ENOMEM; | |
297 | goto parse_out; | |
298 | } | |
299 | ||
300 | doit_buf->sk = msg->dst_sk; | |
301 | ||
302 | memset(&info, 0, sizeof(info)); | |
303 | info.attrs = attrbuf; | |
304 | ||
305 | err = (*cmd->doit)(doit_buf, &info); | |
306 | ||
307 | kfree_skb(doit_buf); | |
308 | parse_out: | |
309 | kfree(attrbuf); | |
310 | trans_out: | |
311 | kfree_skb(trans_buf); | |
312 | ||
313 | return err; | |
314 | } | |
315 | ||
316 | static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd, | |
317 | struct tipc_nl_compat_msg *msg) | |
318 | { | |
319 | int err; | |
320 | ||
321 | if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type)) | |
322 | return -EINVAL; | |
323 | ||
324 | err = __tipc_nl_compat_doit(cmd, msg); | |
325 | if (err) | |
326 | return err; | |
327 | ||
328 | /* The legacy API considered an empty message a success message */ | |
329 | msg->rep = tipc_tlv_alloc(0); | |
330 | if (!msg->rep) | |
331 | return -ENOMEM; | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
d0796d1e RA |
336 | static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg, |
337 | struct nlattr **attrs) | |
338 | { | |
339 | struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1]; | |
340 | ||
341 | nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, attrs[TIPC_NLA_BEARER], | |
342 | NULL); | |
343 | ||
344 | return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME, | |
345 | nla_data(bearer[TIPC_NLA_BEARER_NAME]), | |
346 | nla_len(bearer[TIPC_NLA_BEARER_NAME])); | |
347 | } | |
348 | ||
9ab15465 RA |
349 | static int tipc_nl_compat_bearer_enable(struct sk_buff *skb, |
350 | struct tipc_nl_compat_msg *msg) | |
351 | { | |
352 | struct nlattr *prop; | |
353 | struct nlattr *bearer; | |
354 | struct tipc_bearer_config *b; | |
355 | ||
356 | b = (struct tipc_bearer_config *)TLV_DATA(msg->req); | |
357 | ||
358 | bearer = nla_nest_start(skb, TIPC_NLA_BEARER); | |
359 | if (!bearer) | |
360 | return -EMSGSIZE; | |
361 | ||
362 | if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name)) | |
363 | return -EMSGSIZE; | |
364 | ||
365 | if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain))) | |
366 | return -EMSGSIZE; | |
367 | ||
368 | if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) { | |
369 | prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP); | |
370 | if (!prop) | |
371 | return -EMSGSIZE; | |
372 | if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority))) | |
373 | return -EMSGSIZE; | |
374 | nla_nest_end(skb, prop); | |
375 | } | |
376 | nla_nest_end(skb, bearer); | |
377 | ||
378 | return 0; | |
379 | } | |
380 | ||
381 | static int tipc_nl_compat_bearer_disable(struct sk_buff *skb, | |
382 | struct tipc_nl_compat_msg *msg) | |
383 | { | |
384 | char *name; | |
385 | struct nlattr *bearer; | |
386 | ||
387 | name = (char *)TLV_DATA(msg->req); | |
388 | ||
389 | bearer = nla_nest_start(skb, TIPC_NLA_BEARER); | |
390 | if (!bearer) | |
391 | return -EMSGSIZE; | |
392 | ||
393 | if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name)) | |
394 | return -EMSGSIZE; | |
395 | ||
396 | nla_nest_end(skb, bearer); | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
f2b3b2d4 RA |
401 | static inline u32 perc(u32 count, u32 total) |
402 | { | |
403 | return (count * 100 + (total / 2)) / total; | |
404 | } | |
405 | ||
406 | static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg, | |
407 | struct nlattr *prop[], struct nlattr *stats[]) | |
408 | { | |
409 | tipc_tlv_sprintf(msg->rep, " Window:%u packets\n", | |
410 | nla_get_u32(prop[TIPC_NLA_PROP_WIN])); | |
411 | ||
412 | tipc_tlv_sprintf(msg->rep, | |
413 | " RX packets:%u fragments:%u/%u bundles:%u/%u\n", | |
414 | nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), | |
415 | nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), | |
416 | nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), | |
417 | nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), | |
418 | nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); | |
419 | ||
420 | tipc_tlv_sprintf(msg->rep, | |
421 | " TX packets:%u fragments:%u/%u bundles:%u/%u\n", | |
422 | nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), | |
423 | nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), | |
424 | nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), | |
425 | nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), | |
426 | nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); | |
427 | ||
428 | tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n", | |
429 | nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), | |
430 | nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), | |
431 | nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); | |
432 | ||
433 | tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n", | |
434 | nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), | |
435 | nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), | |
436 | nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); | |
437 | ||
438 | tipc_tlv_sprintf(msg->rep, | |
439 | " Congestion link:%u Send queue max:%u avg:%u", | |
440 | nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), | |
441 | nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), | |
442 | nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); | |
443 | } | |
444 | ||
445 | static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg, | |
446 | struct nlattr **attrs) | |
447 | { | |
448 | char *name; | |
449 | struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; | |
450 | struct nlattr *prop[TIPC_NLA_PROP_MAX + 1]; | |
451 | struct nlattr *stats[TIPC_NLA_STATS_MAX + 1]; | |
452 | ||
453 | nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL); | |
454 | ||
455 | nla_parse_nested(prop, TIPC_NLA_PROP_MAX, link[TIPC_NLA_LINK_PROP], | |
456 | NULL); | |
457 | ||
458 | nla_parse_nested(stats, TIPC_NLA_STATS_MAX, link[TIPC_NLA_LINK_STATS], | |
459 | NULL); | |
460 | ||
461 | name = (char *)TLV_DATA(msg->req); | |
462 | if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0) | |
463 | return 0; | |
464 | ||
465 | tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n", | |
466 | nla_data(link[TIPC_NLA_LINK_NAME])); | |
467 | ||
468 | if (link[TIPC_NLA_LINK_BROADCAST]) { | |
469 | __fill_bc_link_stat(msg, prop, stats); | |
470 | return 0; | |
471 | } | |
472 | ||
473 | if (link[TIPC_NLA_LINK_ACTIVE]) | |
474 | tipc_tlv_sprintf(msg->rep, " ACTIVE"); | |
475 | else if (link[TIPC_NLA_LINK_UP]) | |
476 | tipc_tlv_sprintf(msg->rep, " STANDBY"); | |
477 | else | |
478 | tipc_tlv_sprintf(msg->rep, " DEFUNCT"); | |
479 | ||
480 | tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u", | |
481 | nla_get_u32(link[TIPC_NLA_LINK_MTU]), | |
482 | nla_get_u32(prop[TIPC_NLA_PROP_PRIO])); | |
483 | ||
484 | tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n", | |
485 | nla_get_u32(prop[TIPC_NLA_PROP_TOL]), | |
486 | nla_get_u32(prop[TIPC_NLA_PROP_WIN])); | |
487 | ||
488 | tipc_tlv_sprintf(msg->rep, | |
489 | " RX packets:%u fragments:%u/%u bundles:%u/%u\n", | |
490 | nla_get_u32(link[TIPC_NLA_LINK_RX]) - | |
491 | nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]), | |
492 | nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]), | |
493 | nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]), | |
494 | nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]), | |
495 | nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED])); | |
496 | ||
497 | tipc_tlv_sprintf(msg->rep, | |
498 | " TX packets:%u fragments:%u/%u bundles:%u/%u\n", | |
499 | nla_get_u32(link[TIPC_NLA_LINK_TX]) - | |
500 | nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]), | |
501 | nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]), | |
502 | nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]), | |
503 | nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]), | |
504 | nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED])); | |
505 | ||
506 | tipc_tlv_sprintf(msg->rep, | |
507 | " TX profile sample:%u packets average:%u octets\n", | |
508 | nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]), | |
509 | nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) / | |
510 | nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])); | |
511 | ||
512 | tipc_tlv_sprintf(msg->rep, | |
513 | " 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ", | |
514 | perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]), | |
515 | nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), | |
516 | perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]), | |
517 | nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), | |
518 | perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]), | |
519 | nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), | |
520 | perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]), | |
521 | nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); | |
522 | ||
523 | tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n", | |
524 | perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]), | |
525 | nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), | |
526 | perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]), | |
527 | nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])), | |
528 | perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]), | |
529 | nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]))); | |
530 | ||
531 | tipc_tlv_sprintf(msg->rep, | |
532 | " RX states:%u probes:%u naks:%u defs:%u dups:%u\n", | |
533 | nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]), | |
534 | nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]), | |
535 | nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]), | |
536 | nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]), | |
537 | nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES])); | |
538 | ||
539 | tipc_tlv_sprintf(msg->rep, | |
540 | " TX states:%u probes:%u naks:%u acks:%u dups:%u\n", | |
541 | nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]), | |
542 | nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]), | |
543 | nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]), | |
544 | nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]), | |
545 | nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED])); | |
546 | ||
547 | tipc_tlv_sprintf(msg->rep, | |
548 | " Congestion link:%u Send queue max:%u avg:%u", | |
549 | nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]), | |
550 | nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]), | |
551 | nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE])); | |
552 | ||
553 | return 0; | |
554 | } | |
555 | ||
357ebdbf RA |
556 | static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg, |
557 | struct nlattr **attrs) | |
558 | { | |
559 | struct nlattr *link[TIPC_NLA_LINK_MAX + 1]; | |
560 | struct tipc_link_info link_info; | |
561 | ||
562 | nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL); | |
563 | ||
564 | link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]); | |
565 | link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP])); | |
566 | strcpy(link_info.str, nla_data(link[TIPC_NLA_LINK_NAME])); | |
567 | ||
568 | return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO, | |
569 | &link_info, sizeof(link_info)); | |
570 | } | |
571 | ||
37e2d484 RA |
572 | static int tipc_nl_compat_link_set(struct sk_buff *skb, |
573 | struct tipc_nl_compat_msg *msg) | |
574 | { | |
575 | struct nlattr *link; | |
576 | struct nlattr *prop; | |
577 | struct tipc_link_config *lc; | |
578 | ||
579 | lc = (struct tipc_link_config *)TLV_DATA(msg->req); | |
580 | ||
581 | link = nla_nest_start(skb, TIPC_NLA_LINK); | |
582 | if (!link) | |
583 | return -EMSGSIZE; | |
584 | ||
585 | if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name)) | |
586 | return -EMSGSIZE; | |
587 | ||
588 | prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP); | |
589 | if (!prop) | |
590 | return -EMSGSIZE; | |
591 | ||
592 | if (msg->cmd == TIPC_CMD_SET_LINK_PRI) { | |
593 | if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value))) | |
594 | return -EMSGSIZE; | |
595 | } else if (msg->cmd == TIPC_CMD_SET_LINK_TOL) { | |
596 | if (nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value))) | |
597 | return -EMSGSIZE; | |
598 | } else if (msg->cmd == TIPC_CMD_SET_LINK_WINDOW) { | |
599 | if (nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value))) | |
600 | return -EMSGSIZE; | |
601 | } | |
602 | ||
603 | nla_nest_end(skb, prop); | |
604 | nla_nest_end(skb, link); | |
605 | ||
606 | return 0; | |
607 | } | |
608 | ||
1817877b RA |
609 | static int tipc_nl_compat_link_reset_stats(struct sk_buff *skb, |
610 | struct tipc_nl_compat_msg *msg) | |
611 | { | |
612 | char *name; | |
613 | struct nlattr *link; | |
614 | ||
615 | name = (char *)TLV_DATA(msg->req); | |
616 | ||
617 | link = nla_nest_start(skb, TIPC_NLA_LINK); | |
618 | if (!link) | |
619 | return -EMSGSIZE; | |
620 | ||
621 | if (nla_put_string(skb, TIPC_NLA_LINK_NAME, name)) | |
622 | return -EMSGSIZE; | |
623 | ||
624 | nla_nest_end(skb, link); | |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
d0796d1e RA |
629 | static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg) |
630 | { | |
631 | struct tipc_nl_compat_cmd_dump dump; | |
9ab15465 | 632 | struct tipc_nl_compat_cmd_doit doit; |
d0796d1e RA |
633 | |
634 | memset(&dump, 0, sizeof(dump)); | |
9ab15465 | 635 | memset(&doit, 0, sizeof(doit)); |
d0796d1e RA |
636 | |
637 | switch (msg->cmd) { | |
638 | case TIPC_CMD_GET_BEARER_NAMES: | |
639 | msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME); | |
640 | dump.dumpit = tipc_nl_bearer_dump; | |
641 | dump.format = tipc_nl_compat_bearer_dump; | |
642 | return tipc_nl_compat_dumpit(&dump, msg); | |
9ab15465 RA |
643 | case TIPC_CMD_ENABLE_BEARER: |
644 | msg->req_type = TIPC_TLV_BEARER_CONFIG; | |
645 | doit.doit = tipc_nl_bearer_enable; | |
646 | doit.transcode = tipc_nl_compat_bearer_enable; | |
647 | return tipc_nl_compat_doit(&doit, msg); | |
648 | case TIPC_CMD_DISABLE_BEARER: | |
649 | msg->req_type = TIPC_TLV_BEARER_NAME; | |
650 | doit.doit = tipc_nl_bearer_disable; | |
651 | doit.transcode = tipc_nl_compat_bearer_disable; | |
652 | return tipc_nl_compat_doit(&doit, msg); | |
f2b3b2d4 RA |
653 | case TIPC_CMD_SHOW_LINK_STATS: |
654 | msg->req_type = TIPC_TLV_LINK_NAME; | |
655 | msg->rep_size = ULTRA_STRING_MAX_LEN; | |
656 | msg->rep_type = TIPC_TLV_ULTRA_STRING; | |
657 | dump.dumpit = tipc_nl_link_dump; | |
658 | dump.format = tipc_nl_compat_link_stat_dump; | |
659 | return tipc_nl_compat_dumpit(&dump, msg); | |
357ebdbf RA |
660 | case TIPC_CMD_GET_LINKS: |
661 | msg->req_type = TIPC_TLV_NET_ADDR; | |
662 | msg->rep_size = ULTRA_STRING_MAX_LEN; | |
663 | dump.dumpit = tipc_nl_link_dump; | |
664 | dump.format = tipc_nl_compat_link_dump; | |
665 | return tipc_nl_compat_dumpit(&dump, msg); | |
37e2d484 RA |
666 | case TIPC_CMD_SET_LINK_TOL: |
667 | case TIPC_CMD_SET_LINK_PRI: | |
668 | case TIPC_CMD_SET_LINK_WINDOW: | |
669 | msg->req_type = TIPC_TLV_LINK_CONFIG; | |
670 | doit.doit = tipc_nl_link_set; | |
671 | doit.transcode = tipc_nl_compat_link_set; | |
672 | return tipc_nl_compat_doit(&doit, msg); | |
1817877b RA |
673 | case TIPC_CMD_RESET_LINK_STATS: |
674 | msg->req_type = TIPC_TLV_LINK_NAME; | |
675 | doit.doit = tipc_nl_link_reset_stats; | |
676 | doit.transcode = tipc_nl_compat_link_reset_stats; | |
677 | return tipc_nl_compat_doit(&doit, msg); | |
d0796d1e RA |
678 | } |
679 | ||
680 | return -EOPNOTSUPP; | |
681 | } | |
682 | ||
683 | static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info) | |
684 | { | |
685 | int err; | |
686 | int len; | |
687 | struct tipc_nl_compat_msg msg; | |
688 | struct nlmsghdr *req_nlh; | |
689 | struct nlmsghdr *rep_nlh; | |
690 | struct tipc_genlmsghdr *req_userhdr = info->userhdr; | |
691 | struct net *net = genl_info_net(info); | |
692 | ||
693 | memset(&msg, 0, sizeof(msg)); | |
694 | ||
695 | req_nlh = (struct nlmsghdr *)skb->data; | |
696 | msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN; | |
697 | msg.cmd = req_userhdr->cmd; | |
698 | msg.dst_sk = info->dst_sk; | |
699 | ||
700 | if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) { | |
701 | msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN); | |
702 | err = -EACCES; | |
703 | goto send; | |
704 | } | |
705 | ||
706 | len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN); | |
707 | if (TLV_GET_LEN(msg.req) && !TLV_OK(msg.req, len)) { | |
708 | msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); | |
709 | err = -EOPNOTSUPP; | |
710 | goto send; | |
711 | } | |
712 | ||
713 | err = tipc_nl_compat_handle(&msg); | |
714 | if (err == -EOPNOTSUPP) | |
715 | msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED); | |
716 | else if (err == -EINVAL) | |
717 | msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR); | |
718 | send: | |
719 | if (!msg.rep) | |
720 | return err; | |
721 | ||
722 | len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); | |
723 | skb_push(msg.rep, len); | |
724 | rep_nlh = nlmsg_hdr(msg.rep); | |
725 | memcpy(rep_nlh, info->nlhdr, len); | |
726 | rep_nlh->nlmsg_len = msg.rep->len; | |
727 | genlmsg_unicast(net, msg.rep, NETLINK_CB(skb).portid); | |
728 | ||
729 | return err; | |
730 | } | |
731 | ||
bfb3e5dd RA |
732 | static int handle_cmd(struct sk_buff *skb, struct genl_info *info) |
733 | { | |
734 | struct net *net = genl_info_net(info); | |
735 | struct sk_buff *rep_buf; | |
736 | struct nlmsghdr *rep_nlh; | |
737 | struct nlmsghdr *req_nlh = info->nlhdr; | |
738 | struct tipc_genlmsghdr *req_userhdr = info->userhdr; | |
739 | int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN); | |
740 | u16 cmd; | |
741 | ||
742 | if ((req_userhdr->cmd & 0xC000) && | |
743 | (!netlink_net_capable(skb, CAP_NET_ADMIN))) | |
744 | cmd = TIPC_CMD_NOT_NET_ADMIN; | |
745 | else | |
746 | cmd = req_userhdr->cmd; | |
747 | ||
748 | rep_buf = tipc_cfg_do_cmd(net, req_userhdr->dest, cmd, | |
749 | nlmsg_data(req_nlh) + GENL_HDRLEN + | |
750 | TIPC_GENL_HDRLEN, | |
751 | nlmsg_attrlen(req_nlh, GENL_HDRLEN + | |
752 | TIPC_GENL_HDRLEN), hdr_space); | |
753 | ||
754 | if (rep_buf) { | |
755 | skb_push(rep_buf, hdr_space); | |
756 | rep_nlh = nlmsg_hdr(rep_buf); | |
757 | memcpy(rep_nlh, req_nlh, hdr_space); | |
758 | rep_nlh->nlmsg_len = rep_buf->len; | |
759 | genlmsg_unicast(net, rep_buf, NETLINK_CB(skb).portid); | |
760 | } | |
761 | ||
762 | return 0; | |
763 | } | |
764 | ||
d0796d1e RA |
765 | /* Temporary function to keep functionality throughout the patchset |
766 | * without having to mess with the global variables and other trickery | |
767 | * of the old API. | |
768 | */ | |
769 | static int tipc_nl_compat_tmp_wrap(struct sk_buff *skb, struct genl_info *info) | |
770 | { | |
771 | struct tipc_genlmsghdr *req = info->userhdr; | |
772 | ||
773 | switch (req->cmd) { | |
774 | case TIPC_CMD_GET_BEARER_NAMES: | |
9ab15465 RA |
775 | case TIPC_CMD_ENABLE_BEARER: |
776 | case TIPC_CMD_DISABLE_BEARER: | |
f2b3b2d4 | 777 | case TIPC_CMD_SHOW_LINK_STATS: |
357ebdbf | 778 | case TIPC_CMD_GET_LINKS: |
37e2d484 RA |
779 | case TIPC_CMD_SET_LINK_TOL: |
780 | case TIPC_CMD_SET_LINK_PRI: | |
781 | case TIPC_CMD_SET_LINK_WINDOW: | |
1817877b | 782 | case TIPC_CMD_RESET_LINK_STATS: |
d0796d1e RA |
783 | return tipc_nl_compat_recv(skb, info); |
784 | } | |
785 | ||
786 | return handle_cmd(skb, info); | |
787 | } | |
788 | ||
bfb3e5dd RA |
789 | static struct genl_family tipc_genl_compat_family = { |
790 | .id = GENL_ID_GENERATE, | |
791 | .name = TIPC_GENL_NAME, | |
792 | .version = TIPC_GENL_VERSION, | |
793 | .hdrsize = TIPC_GENL_HDRLEN, | |
794 | .maxattr = 0, | |
795 | .netnsok = true, | |
796 | }; | |
797 | ||
798 | static struct genl_ops tipc_genl_compat_ops[] = { | |
799 | { | |
800 | .cmd = TIPC_GENL_CMD, | |
d0796d1e | 801 | .doit = tipc_nl_compat_tmp_wrap, |
bfb3e5dd RA |
802 | }, |
803 | }; | |
804 | ||
805 | int tipc_netlink_compat_start(void) | |
806 | { | |
807 | int res; | |
808 | ||
809 | res = genl_register_family_with_ops(&tipc_genl_compat_family, | |
810 | tipc_genl_compat_ops); | |
811 | if (res) { | |
812 | pr_err("Failed to register legacy compat interface\n"); | |
813 | return res; | |
814 | } | |
815 | ||
816 | return 0; | |
817 | } | |
818 | ||
819 | void tipc_netlink_compat_stop(void) | |
820 | { | |
821 | genl_unregister_family(&tipc_genl_compat_family); | |
822 | } |